Cell reselection procedure for hard cell identification change

Abstract

A wireless terminal of a cellular telecommunications system communicates with a first cell served by a mobile base station repeater. The wireless terminal includes a receiver circuit and a processor circuit. The receiver circuit is configured to receive cell identification change information from a first cell, the cell identification change information comprising: (1) second cell information comprising a cell identification of a second cell; and (2) an activation time after which the second cell may be measured. The processor circuit is configured to perform a cell reselection procedure based on the cell identification change information to reselect a second cell at or after the activation time.

Description

Technical Field

[0001] The present technology relates to wireless communications, and in particular to mobile base stations and their operation. Background Art

[0002] The radio access network typically resides between a wireless device (such as a user equipment (UE), a mobile phone, a mobile station, or any other device with a wireless terminal) and the core network. Examples of radio access network types include: GRAN, which is the GSM radio access network; GERAN, which includes EDGE packet radio service; UTRAN, which is the UMTS radio access network; E-UTRAN, which includes long term evolution; and g-UTRAN, which is new radio (NR).

[0003] The radio access network may include one or more access nodes, such as base station nodes, which facilitate wireless communications or otherwise provide an interface between a wireless terminal and a telecommunications system. Non-limiting examples of base stations may include Node B ("NB"), enhanced Node B ("eNB"), Home eNB ("HeNB"), gNB (for New Radio ["NR"] technology systems), or some other similar terminology, depending on the radio access technology type.

[0004] The 3rd Generation Partnership Project ("3GPP") is a group that develops collaborative agreements, such as 3GPP standards, that are intended to establish globally applicable technical specifications and technical reports for wireless communication systems. Various 3GPP documents may describe certain aspects of radio access networks. The overall architecture of fifth generation systems (e.g., 5G systems, also referred to as "NR" or "new radio", and "NG" or "next generation") is described in Fig.51 , and is also described in 3GPP TS 38.300. The 5G NR network consists of NG RAN (next generation radio access network) and 5GC (5G core network). As shown in the figure, NGRAN consists of gNB (e.g., 5G base station) and ng-eNB (i.e., LTE base station). The Xn interface exists between gNB-gNB, between (gNB)-(ng-eNB), and between (ng-eNB)-(ng-eNB). Xn is the network interface between NG-RAN nodes. Xn-U represents the Xn user plane interface, and Xn-C represents the Xn control plane interface. The NG interface exists between 5GC and base stations (i.e., gNB and ng-eNB). The gNB node provides NR user plane and control plane protocol terminals to the UE and is connected to the 5GC via the NG interface. The 5G NR (new radio) gNB is connected to the AMF (access and mobility management function) and UPF (user plane function) in the 5GC (5G core network).

[0005] In some urban environments, installing additional base stations on buildings or other infrastructure sites may face typical deployment challenges and burdens, such as real estate availability and cost, or binding regulations. In the same urban environment, combined with the high density of users, the presence and availability of many vehicles around can also be expected, such as for public / private passenger transportation, goods delivery, food trucks, etc., which usually move at low / pedestrian speeds (or temporarily stationary). Some of these vehicles may follow a certain known / predictable route (e.g., bus or tram, etc.), or be located in a specific location (e.g., outside a stadium), passing through or around areas where additional cellular coverage and capacity will be required. These vehicles will actually provide a convenient and effective venue at which to install a vehicle-mounted base station acting as a relay to provide 5G network coverage and connectivity to adjacent UEs outside the vehicle. Vehicle relays are obviously very suitable and optimal for connecting users or devices inside the vehicle itself, not only in urban areas, but also adapting to other environments and vehicle speeds, such as for passengers in buses, cars / taxi or trains. In other scenarios, such as during outdoor sporting events or pedestrian events, a vehicle equipped with a relay can conveniently move with and provide services to users or devices outside the vehicle.

[0006] Technical benefits of using vehicle relays may include, among other things, the ability of vehicle relays to obtain better macro coverage than nearby UEs due to better RF / antenna capabilities, thereby providing the UE with a better link to the macro network. Additionally, vehicle relays are expected to have looser power or battery constraints than UEs.

[0007] In the 3rd Generation Partnership Project 3GPP, research on vehicle-mounted repeaters (VMRs) has begun to analyze the gap between existing functions and required functions. During the study, it is assumed that the VMR will provide a 5G radio interface to the UE, namely the NR-Uu interface. This means that the VMR will be equipped with a base station (e.g., gNB) function to serve one or more cells, and the coverage of the one or more cells can be geographically mobile.

[0008] What are needed are methods, apparatus and / or techniques that address the challenges caused by the mobility of base stations. Summary of the invention

[0009] In one example, a wireless terminal of a cellular telecommunication system, the wireless terminal communicating with a first cell served by a mobile base station repeater, the wireless terminal comprising: a receiver circuit configured to receive cell identification change information from the first cell, the cell identification change information comprising: second cell information including a cell identification of the second cell; and an activation time after which the second cell can be measured; and a processor circuit configured to perform a cell reselection process based on the cell identification change information to reselect the second cell at or after the activation time.

[0010] In one example, a mobile base station repeater of a cellular telecommunication system, the mobile base station repeater serving a wireless terminal via a first cell, the mobile base station repeater comprising: a processor circuit configured to generate cell identification change information, the cell identification change information comprising: second cell information, the second cell information comprising a cell identification of a second cell; and an activation time after which the second cell can be measured; a transmitter circuit configured to transmit the cell identification change information to the wireless terminal, and wherein the cell identification change information is configured for use by the wireless terminal to perform a cell reselection process to reselect the second cell at or after the activation time.

[0011] In one example, a method for a wireless terminal of a cellular telecommunication system, the wireless terminal communicating with a first cell served by a mobile base station repeater, the method comprising: receiving cell identification change information from the first cell, the cell identification change information comprising: second cell information, the second cell information comprising a cell identification of the second cell; and an activation time after which the second cell can be measured; performing a cell reselection process based on the cell identification change information to reselect the second cell at or after the activation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The foregoing and other objects, features, and advantages of the technology disclosed herein will be apparent from the following more particular description of preferred embodiments as illustrated in the accompanying drawings, in which reference numerals refer to the same parts in the various views. The accompanying drawings are not necessarily drawn to scale, emphasis instead being placed on illustrating the principles of the technology disclosed herein. [ Figure 1 ] Figure 1 is a diagrammatic view of a communication system showing both a core network and a radio access network, wherein the radio access network includes a mobile base station relay. [ Figure 2 ] Figure 2 According to example implementations and modes Figure 1 A schematic diagram of nodes of a communication system including an example carrier node, an example mobile base station relay node, and a wireless terminal node. [ Figure 3 ] Figure 3 is a diagrammatic view of a communication system showing both a core network and a radio access network, wherein the radio access network includes a mobile base station relay that transmits serving cell mobility information. [ Figure 4 ] Figure 4 is an example communication system (such as Figure 3 A schematic diagram of an example structure and function of a communication system) in which a mobile base station relay node provides serving cell mobility information to one or more wireless terminals. [ Figure 5 ] Figure 5 It is shown by Figure 3 Flowchart of representative example steps or actions performed by a wireless terminal of a communication system of example embodiments and modes. [ Figure 6 ] Figure 6 It is shown by Figure 3 Flowchart of representative example steps or actions performed by a mobile base station relay node of a communication system of example embodiments and modes. [ Figure 7 ] Figure 7 is a diagrammatic view of a communication system showing both a core network and a radio access network, wherein the radio access network includes a carrier gNB node that transmits neighboring cell mobility information to wireless terminals. [ Figure 8 ] Figure 8 yes Figure 7 Schematic diagram of example architecture and functionality of an example communication system of example implementation schemes and modes, including a carrier gNB for transmitting neighboring cell mobility information. [ Fig. 9 ] Fig. 9 It is shown by Figure 7 Flowchart of representative example steps or actions performed by a wireless terminal of a communication system of example embodiments and modes. [ Fig.10 ] Fig.10 It is shown by Figure 7 A flowchart of representative example steps or actions performed by a gNB base station node of a communication system of example implementation schemes and modes. [ Fig.11 ] Fig.11 is a diagrammatic view of a communication system showing both a core network and a radio access network, wherein one or both of a carrier gNB node and a mobile base station relay transmits cell mobility information and a cell reselection configuration to a wireless terminal that can perform a cell reselection determination or process. [ Fig.12 ] Fig.12is a schematic diagram of an example embodiment and mode of a communication system, showing Fig.11 Example structures and functions of carrier gNBs, mobile base station relays and wireless terminals of example implementation schemes. [ Fig.13 ] Fig.13 It is shown by Fig.11 Flowchart of representative example steps or actions performed by a wireless terminal of a communication system of example embodiments and modes. [ Fig.14 ] Fig.14 It is shown by Fig.11 A flowchart of representative example steps or actions performed by either or both of a gNB base station node and a mobile base station relay of a communication system of example implementation schemes and modes. [ Fig.15 ] Fig.15 is a diagrammatic view of a communication system showing a mobile base station relay transmitting both neighbor cell relative mobility information and an optional cell reselection configuration to a wireless terminal that may perform a cell reselection determination or procedure. [ Fig.16 ] Fig.16 is a schematic diagram of an example embodiment and mode communication system, showing Fig.15 Example structures and functions of mobile base station repeaters and wireless terminals of example embodiments. [ Fig.17 ] Fig.17 It is shown by Fig.15 Flowchart of representative example steps or actions performed by a wireless terminal of a communication system of example embodiments and modes. [ Fig.18 ] Fig.18 It is shown by Fig.15 Flowchart of representative example steps or actions performed by a mobile base station repeater of a communication system of example embodiments and modes. [ Fig.19 ] Fig.19 is a diagrammatic view of a communication system showing both a core network and a radio access network, wherein the radio access network includes a mobile base station repeater that transmits vehicle identification information. [ Fig. 20 ] Fig. 20 is a schematic diagram of an embodiment and mode communication system, showing Fig.19 Example structures and functions of carrier gNBs, mobile base station relays and wireless terminals of example implementation schemes. [ Fig.21 ] Fig.21 is a schematic diagram showing a mobile base station repeater transmitting vehicle identification information to a wireless terminal, and wherein the wireless terminal uses the received vehicle information to perform manual VMR selection. [ Fig.22A ] Fig.22A is a diagrammatic view illustrating an example scenario in which a wireless terminal receives vehicle information indicating a vehicle in which a user is riding, thereby providing the user with an opportunity to confirm or affirm the vehicle information, thereby also affecting a cell selection or reselection process, and the wireless terminal is stationed on a mobile base station repeater carried by the vehicle in which the user of the wireless terminal is riding. [ Fig. 22B ] Fig. 22B is a diagrammatic view illustrating an example scenario in which a wireless terminal receives vehicle information indicating a vehicle other than the vehicle in which a user of the wireless terminal is riding, thereby providing the user with an opportunity to reject or negatively confirm the vehicle information, thereby also affecting the cell selection or reselection process, and the wireless terminal is resident on a mobile base station repeater carried by the other vehicle. [ Fig.23 ] Fig.23 is a schematic diagram showing a mobile base station repeater transmitting vehicle identification information to a wireless terminal, and wherein the wireless terminal uses the received vehicle information in automatic cell selection / reselection utilizing predicted / scheduled mobility. [ Fig.24 ] Fig.24 is a schematic diagram of a communication system in which a wireless terminal obtains segmented vehicle information from one or more sources. [ Fig.25 ] Fig.25 It is shown by Fig.19 Flowchart of representative example steps or actions performed by a wireless terminal of a communication system of example embodiments and modes. [ Fig.26 ] Fig.26 It is shown by Fig.19 Flowchart of representative example steps or actions performed by a mobile base station repeater of a communication system of example embodiments and modes. [ Fig. 27 ] Fig. 27 is a diagrammatic view of a communication system showing both a core network and a radio access network, and illustrating an example representative scenario in which the communication network invites a soft cell identity change of a cell served by a mobile relay base station. [ Fig.28 ] Fig.28 is a two-dimensional graph depicting the change in soft cell identity of a cell served by a mobile relay base station as a function of time and distance. [ Fig.29 ] Fig.29 is a schematic diagram of an example embodiment and mode communication system, showing Fig. 27 Example structures and functions of core network nodes, carrier gNBs, mobile base station relays and wireless terminals of example implementation schemes. [ Fig.30 ] Fig.30 It is shown for Fig. 27 communication systems and Fig.28 A diagrammatic view of an example message flow and associated events for a scenario. [ Fig.31 ] Fig.31 It is shown by Fig. 27 Flowcharts of representative example steps or actions performed by example network entities of a communication system of example embodiments and modes. [ Fig.32 ] Fig.32 It is shown by Fig. 27 Flowchart of representative example steps or actions performed by an example wireless terminal of a communication system of example embodiments and modes. [ Fig.33 ] Fig.33 It is shown by Fig. 27 Flowchart of representative example steps or actions performed by an example mobile station relay of a communication system of example embodiments and modes. [ Fig.34 ] Fig.34 is a schematic diagram of an example embodiment and mode communication system, showing example structures and functions of core network nodes, mobile base station relays and wireless terminals, which communication system performs a cell reselection process that depends on whether a newly discovered neighboring cell is a replacement cell. [ Fig.35 ] Fig.35 It shows that according to Fig.34 Flowchart of representative example steps or actions performed by a cell reselection process of example embodiments and modes. [ Fig.36 ] Fig.36 It is shown by Fig.34 Flowchart of representative example steps or actions performed by an example wireless terminal of a communication system of example embodiments and modes. [ Fig.37 ] Fig.37 It is shown by Fig.34 Flowchart of representative example steps or actions performed by an example mobile station relay of a communication system of example embodiments and modes. [ Fig.38 ] Fig.38 is a diagrammatic view of a communication system showing both a core network and a radio access network, and illustrating an example representative scenario in which the communication network invites a soft cell identity change of a cell served by a mobile relay base station, wherein the cell replacing the serving cell operates on a frequency different from that of the serving cell. [ Fig.39 ] Fig.39is a diagrammatic view of a communication system showing both a core network and a radio access network, and illustrating an example representative scenario in which a wireless terminal may invalidate / discard a stored cell reselection priority configured by dedicated signaling upon receiving system information indicating a soft cell identity change to transition to a new cell operating on a frequency different from that of a serving cell. [ Fig.40 ] Fig.40 is a diagrammatic view showing example representative information elements included in the inter-frequency neighbor cell information 900. [ Fig.41 ] Fig.41 is used for Fig.39 An example flow chart of a cell reselection process for a wireless terminal according to an example implementation scheme and mode. [ Fig.42 ] Fig.42 It is shown by Fig.39 Flowchart of representative example steps or actions performed by an example wireless terminal of a communication system of example embodiments and modes. [ Fig.43 ] Fig.43 It is shown by Fig.39 Flowchart of representative example steps or actions performed by an example mobile station relay of a communication system of example embodiments and modes. [ Fig.44 ] Fig.44 is a schematic diagram illustrating a communication system of both a core network and a radio access network, the communication system providing an enhanced method for optimizing a cell reselection procedure for hard cell identity change. [ Fig.45 ] Fig.45 is used for Fig.44 A diagrammatic view of a first example scenario of a hard cell identity change for a communication system of FIG. [ Fig.46 ] Fig.46 is used for Fig.44 A diagrammatic view of a second example scenario of a hard cell identity change for a communication system of FIG. [ Fig.47 ] Fig.47 is used for Fig.44 A diagrammatic view of an example message flow and associated events for a communication system of FIG. [ Fig.48 ] Fig.48 It is shown by Fig.44 Flowchart of representative example steps or actions performed by an example wireless terminal of a communication system of example embodiments and modes. [ Fig.49 ] Fig.49 It is shown by Fig.44Flowchart of representative example steps or actions performed by an example mobile station relay of a communication system of example embodiments and modes. [ Fig.50 ] Fig.50 is a diagrammatic view showing example elements making up electronic machinery that may make up a wireless terminal, a radio access node and a core network node according to example embodiments and modes. [ Fig.51 ] Fig.51 is a diagrammatic view of the overall architecture of the 5G New Radio system. DETAILED DESCRIPTION

[0013] In one aspect of the various aspects, the technology disclosed herein relates to a wireless terminal of a cellular telecommunication system. The wireless terminal communicates with a first cell served by a mobile base station repeater. In an exemplary embodiment and mode, the wireless terminal includes a receiver circuit and a processor circuit. The receiver circuit is configured to receive cell identity change information from the first cell, the cell identity change information including: (1) second cell information, the second cell information including a cell identity of the second cell; and (2) an activation time, after which the second cell can be measured. The processor circuit is configured to perform a cell reselection process based on the cell identity change information to reselect the second cell at or after the activation time. A method of operating such a wireless terminal is also provided.

[0014] In another aspect of the example aspects, the technology disclosed herein relates to a mobile base station repeater of a cellular telecommunication system serving a wireless terminal via a serving cell. In a basic example implementation and mode, the mobile base station repeater includes a processor circuit and a transmitter circuit. The processor circuit is configured to generate cell identification change information, the cell identification change information including: (1) second cell information, the second cell information including a cell identification of a second cell; and (2) an activation time, after which the second cell can be measured. The transmitter circuit is configured to transmit the cell identification change information to the wireless terminal. The cell identification change information is configured for use by the wireless terminal to perform a cell reselection process to reselect the second cell at or after the activation time. An operating method of such a mobile base station repeater node is also provided.

[0015] For ease of explanation and not limitation, specific details such as specific architectures, interfaces, technologies, etc. are proposed in the following description so as to thoroughly understand the technology disclosed herein. However, it is obvious to those skilled in the art that the technology disclosed herein can also be implemented in other embodiments different from these specific details. That is, those skilled in the art can conceive of various arrangements, although these arrangements are not explicitly described or shown in this article, they still embody the principles of the technology disclosed herein and are included in its spirit and scope. In some cases, detailed descriptions of well-known devices, circuits, and methods are omitted so that the description of the technology disclosed herein will not be obscure due to unnecessary details. All statements of the principles, aspects, and embodiments of the technology disclosed herein and their specific examples are described herein and are intended to cover their structural and functional equivalents. In addition, it is intended that such equivalents include currently known equivalents and equivalents developed in the future, that is, any element developed to perform the same function, regardless of the structure.

[0016] Thus, for example, those skilled in the art will appreciate that the block diagrams herein can represent conceptual views of exemplary circuits or other functional units that embody technical principles. Similarly, it will be appreciated that any flow charts, state transition diagrams, pseudo codes, etc. represent various processes that can be substantially represented in a computer-readable medium and thus executed by a computer or processor, regardless of whether such a computer or processor is explicitly shown. 1.0 Introduction: General Network Architecture and Operations

[0017] Figure 1 A system diagram of an example 5G network 100 including an onboard repeater is shown. The 5G network 100 also includes a core network 102 connected to one or more radio access network (RAN) nodes, such as a carrier gNB 104a and a carrier gNB 104b, which are connected to the core network 102 via lines 106a and 106b, respectively. The carrier gNB 104a serves at least one cell 108a. Similarly, the carrier gNB 104b serves at least one cell 108b.

[0018] Figure 1 Also shown is a mobile base station relay 112, which may be mounted on a vehicle. The mobile base station relay is shown as an example under or within the network coverage of the cell 108a and is connected to the carrier node 104b via a wireless backhaul link 110. The mobile base station relay 112 serves at least one cell 114. A wireless terminal 116 is served via a wireless access link 118. The wireless terminal 116 may be, for example, a user equipment (UE), an integrated access and backhaul (IAB) node, or another mobile base station relay.

[0019] As used herein, the term "telecommunication system" or "communication system" may refer to any network of devices for transmitting information. Non-limiting examples of telecommunication systems are cellular networks or other wireless communication systems. As used herein, the term "cellular network" or "cellular radio access network" may refer to a network distributed over cells, each cell being served by at least one fixed-position transceiver such as a base station. A "cell" may be any communication channel. All or a portion of a cell may be adopted by 3GPP as a licensed frequency band (e.g., frequency band) to be used for communication between a base station (such as a Node B) and a UE terminal. A cellular network using a frequency band may include configured cells. A configured cell may include a cell that a UE terminal is aware of and is permitted by a base station to transmit or receive information. Examples of cellular radio access networks include E-UTRAN or New Radio (NR) and any successor networks thereof (e.g., NUTRAN).

[0020] A core network CN, such as a core network (CN) 102, may include many servers, routers, and other devices. As used herein, the term "core network" may refer to a device, a group of devices, or a subsystem in a telecommunications network that provides services to telecommunications network users. Examples of services provided by a core network include aggregation, authentication, call switching, service invocation, gateways to other networks, and the like. For example, a core network (CN) 102 may include one or more management entities, which may be access and mobility management functions AMFs.

[0021] A radio access network RAN ​​usually includes multiple access nodes. Figure 1 Some example access nodes 104a, 104b, and 112 are shown in FIG. As used herein, the term "access node," "node," or "base station" may refer to any device or group of devices that facilitates wireless communication or otherwise provides an interface between a wireless terminal and a telecommunications system. In the 3GPP specifications, non-limiting examples of base stations may include Node B ("NB"), enhanced Node B ("eNB"), Home eNB ("HeNB"), gNB (for New Radio ["NR"] technology systems), or some other similar terminology.

[0022] As used herein, for a UE in idle mode, a "serving cell" is a cell in which a wireless terminal in idle mode resides. See, for example, 3GPP TS 38.304. For a UE in RRC_CONNECTED that is not configured with carrier aggregation (CA) / dual connectivity (DC), there is only one serving cell including the primary cell. For a UE in RRC_CONNECTED that is configured with CA / DC, the term "serving cell" is used to refer to a set of cells consisting of a special cell and all secondary cells. See, for example, 3GPP TS 38.331.

[0023] As used herein, the term "wireless terminal" may refer to any electronic device used to transmit voice and / or data via a telecommunication system, such as, but not limited to, a cellular network. Other terms used to refer to a wireless terminal and non-limiting examples of such devices may include a user equipment terminal, UE, mobile station, mobile device, access terminal, subscriber station, mobile terminal, remote station, user terminal, terminal, subscriber unit, cellular phone, smart phone, personal digital assistant ("PDA"), laptop computer, tablet computer, netbook, e-reader, wireless modem, etc.

[0024] A wireless terminal communicates with its serving radio access network over a radio or air interface. Communications between a radio access network (RAN) 22 and a wireless terminal over a radio interface are performed using "resources". Any reference to "resources" herein refers to "radio resources" unless it is clear from the context that another meaning is intended. Generally speaking, as used herein, a radio resource ("resource") is a time-frequency unit that can carry information (e.g., signal information or data information) over a radio interface.

[0025] An example of radio resources occurs in the context of a "frame" of information that is typically formatted and written by a node, for example. In Long Term Evolution (LTE), a frame that may have one or more downlink parts and one or more uplink parts is transmitted between a base station and a wireless terminal. Each LTE frame may include multiple subframes. For example, in the time domain, a 10ms frame consists of ten one-millisecond subframes. An LTE subframe is divided into two time slots (thus making 20 time slots in a frame). The signal transmitted in each time slot is described by a resource grid consisting of resource elements (REs). Each column of the two-dimensional grid represents a symbol (e.g., an OFDM symbol on a downlink (DL) from a node to a wireless terminal; an SC-FDMA symbol in an uplink (UL) frame from a wireless terminal to a node). Each row of the grid represents a subcarrier. A resource element RE is the smallest time-frequency unit used for downlink transmission in a subframe. That is, a symbol on a subcarrier in a subframe includes a resource element (RE) uniquely defined by an index pair (k, l) in the time slot (where k and l are indices in the frequency domain and time domain, respectively). In other words, one symbol on one subcarrier is a resource element (RE). Each symbol includes multiple subcarriers in the frequency domain, and the specific number depends on the channel bandwidth and configuration. The minimum frequency resource supported by today's standards is a collection of multiple subcarriers and multiple symbols (e.g., multiple resource elements (RE)), and is called a resource block (RB). In the case of a canonical cyclic prefix, a resource block may include, for example, 84 resource elements, i.e., 12 subcarriers and 7 symbols.

[0026] In 5G New Radio ("NR"), a frame consists of 10ms duration. A frame consists of 10 subframes, each with 1ms duration, similar to LTE. Each subframe consists of 2 μ timeslots. Each timeslot can have 14 (normal CP) or 12 (extended CP) OFDM symbols. A timeslot is a typical unit used for transmission by a scheduling mechanism. NR allows transmission to start at any OFDM symbol and only lasts for the number of symbols required for communication. This is called "microslot" transmission. This facilitates very low latency for critical data communications and minimizes interference to other RF links. Microslots help achieve lower latency in the 5G NR architecture. Unlike timeslots, microslots are not associated with a frame structure. It helps to truncate existing frames without waiting for scheduling. See, for example, https: / / www.rfwireless-world.com / 5G / 5G-NR-Mini-Slot.html, which is incorporated herein by reference.

[0027] As will be appreciated from the foregoing, the radio access network in turn communicates with one or more core networks (CNs) 102 via a RAN-CN interface (eg, N2 interface).

[0028] In a typical deployment scenario, the cell 108a or 108b may be a macro cell and thus may cover a relatively large area if so desired or planned. On the other hand, the coverage of the cell 114 served by the mobile base station repeater 112 may be smaller, for example, limited to the interior and / or vicinity of a vehicle, for example.

[0029] In some configurations, the 5G system 100 may perform mobility management functions for the wireless backhaul link 110 of the mobile base station relay 112. Such mobility management functions may include, for example, handover and connection establishment / reestablishment operations, such as connection establishment / reestablishment. Figure 1 In the mobility scenario shown in , when the mobile base station repeater 112 moves from the coverage of cell 108a toward the coverage of cell 108b as depicted by arrow 120, the mobile base station repeater 112 may report a measurement report that includes information about the absolute / relative signal strength / quality of the signals from the carrier gNB 104a and the carrier gNB 104b. Based on the measurement report, the carrier gNB 104a may initiate a handover procedure to handover the mobile base station repeater 112 to the carrier gNB 104b as the target gNB. At the same time, while the wireless terminal 116 remains close to the mobile base station repeater 112, the wireless terminal 116 may be unaware of the handover on the wireless backhaul link 110. An example of the wireless terminal 116 remaining close to the mobile base station repeater 112 is that the wireless terminal 116 is inside a vehicle.

[0030] Figure 2 Shows such as Figure 1 Example implementations and modes of the example representative universal mobile base station relay 112 and the example representative wireless terminal 116 or UE depicted in FIG. Figure 2 As shown, mobile station relay 112 may include one or more mobile station relay processors or mobile station processor circuits, generally shown as mobile station relay processor 200 .

[0031] In addition, the mobile base station relay 112 may include a gNB function 201, a relay function 202, and a mobile terminal (MT) function 204. The gNB function 201 may also be referred to as a gNB controller 201 in this document; the relay function 202 may also be referred to as a relay controller 202 in this document; and the mobile terminal (MT) function 204 may also be referred to as a mobile terminal (MT) controller 204 in this document.

[0032] The MT function 204 may also include transmitter circuitry and receiver circuitry, such as a transmitter 206 and a receiver 208 for an upstream link. For example, an uplink flow may be a wireless backhaul link 110 to a cell 114. The MT function 204 may be responsible for maintaining communication with a carrier gNB 114 (e.g., Figure 1 gNB 114a or 114b), for which Figure 2 The carrier gNB is generally labeled as gNB 114. In the case where the aforementioned NR-Uu interface is used for the wireless backhaul link 110, the functionality of the MT function 204 can be similar to the functionality of the UE.

[0033] The gNB function 201 may also include at least one transmit and receive point (TRP) 222. The transmit and receive point (TRP) 222 may also include transmitter circuitry and receiver circuitry, such as at least one transmitter 224, at least one receiver 226, and one or more antennas 228 for a downstream link (e.g., a radio access link 118). The gNB function 201 may behave like a conventional gNB and may be responsible for managing the cell 114 to serve the wireless terminal 116. The relay function 202 may perform relaying of user data and / or signaling traffic from a downstream link to an upstream link and vice versa.

[0034] Figure 2 Also shown are various example components and functionality of wireless terminal 116. For example, Figure 2 The wireless terminal 116 is shown as including a transceiver circuit 276. The transceiver circuit 276 may in turn include a transmitter circuit 277 and a receiver circuit 278. The transceiver circuit 276 may include an antenna 279 for wireless transmission. The transmitter circuit 277 may include, for example, amplifiers, modulation circuits, and other conventional transmission equipment. The receiver circuit 278 may include, for example, amplifiers, demodulation circuits, and other conventional receiver equipment.

[0035] Figure 2 Also shown is a wireless terminal 116, which also includes wireless terminal processor circuitry, such as one or more wireless terminal processors 290. The wireless terminal 116 (e.g., wireless terminal processor 290) may include a frame / message generator / handler 294. As will be appreciated by those skilled in the art, in some telecommunication systems, messages, signals and / or data are transmitted over a radio or air interface using one or more "resources" (e.g., "radio resources").

[0036] The wireless terminal 116 may also include an interface 292, including one or more user interfaces. Such user interfaces may be used for user input and output operations, and may include, for example, a screen such as a touch screen that may display information to a user and receive information input by the user. For example, the user interface 292 may also include other types of devices, such as a speaker, a microphone, or a tactile feedback device.

[0037] It should be understood that the mobility of the cell 114 means that at least one TRP 222 serving the cell 114 moves geographically at least at a certain point in time, for example, the mobile base station repeater 112 and its transmit and receive point (TRP) 222 need not always be in a fixed location. When the mobile base station repeater 112 moves, the mobility of the TRP 222 causes the coverage area of ​​the cell 114 to move. This mobility may not include changes in the cell range when the TRP is in a fixed location. 2.0 Serving Cell Mobility Information: Overview

[0038] Figure 3 Exemplary scenarios of example embodiments and modes are shown. Figure 4 Shows that you can participate Figure 3 The structure and functionality of the nodes of the example scene. Figure 3 and Figure 4 The structure and function of the exemplary embodiments and modes are Figure 1 and Figure 2 The structures and functions shown by corresponding reference numerals in the figure are substantially the same, unless otherwise specified or obvious from the context. In a conventional cellular system such as Long Term Evolution (LTE), the cells served by a base station are designed to be stationary. Based on this principle, a wireless terminal performs various processes including cell selection / reselection, measurement, registration, and handover. For example, by referring to Figure 1 and Figure 2 The method of understanding introduces mobile base station repeaters (such as Figure 3 and Figure 4 The mobility of the cell may affect the wireless terminal (such as the mobile base station relay 112). Figure 3 and Figure 4 behavior of the wireless terminal 116).

[0039] exist Figure 3 and Figure 4 In an example embodiment and mode of the present invention, the mobile base station relay 112 includes a mobility state information generator 300. The mobile base station relay 112 can use its mobility state information generator 300 to inform the wireless terminal 116 about its mobility (e.g., the mobility of the mobile base station relay 112). The information about the mobility of the mobile base station relay 112 provided by the cell 114 through the mobile base station relay 112 is referred to herein as "serving cell mobility information" or "serving cell mobility information 320". Specifically, Figure 3 The cell 114 may transmit serving cell mobility information 320 to the wireless terminal 116. Figure 4 As shown, the mobile station relay 112 may include a mobility state information generator 300 that generates and / or stores serving cell mobility information provided by the mobile station relay 112 to the wireless terminal 116. The mobility state information generator 300 may be implemented as part of the mobile station relay processor 200 or by the processor, such as by the relay controller 202. The mobility state information generator 300 may obtain the serving cell mobility information, which the generator transmits in one or more of several ways. For example, the mobility state information generator 300 may obtain the serving cell mobility information from pre-configured information, from configuration information received from a carrier gNB or core network, or from a device equipped in a vehicle that detects and / or monitors mobility and optionally other parameters or characteristics of the vehicle and its travel.

[0040] When wireless terminal 116 receives serving cell mobility information 320, wireless terminal 116 may use the information to determine the mobility state of the cell on which wireless terminal 116 is camping or attempting to camp. Figure 4 The wireless terminal 116 is also shown to include a mobility state determination controller 330. The mobility state determination controller 330 may process and may act on the serving cell mobility information received by the wireless terminal 116 via the transceiver circuit 276. For example, the serving cell mobility information 320 may also be used by applications and / or processes running on the wireless terminal 116. For example, one example of the use of the cell mobility information is disclosed in a cell reselection determination or process, as shown in reference Figures 11 to 14 Example embodiments and modes are described. 2.1 Serving cell mobility information: transmission method

[0041] The serving cell mobility information 320 may be broadcast in the cell 114 via system information. In this case, in accordance with 3GPP TS 38.331, the serving cell mobility information 320 may be included in a master information block (MIB), a system information block type 1 (SIB1), and / or other system information blocks (SIBs). See, for example, 3rd Generation Partnership Project 3GPP TS 38.331 V16.2.0 (2020-09); Technical Specification Group Radio Access Network; NR; Radio Resource Control (RRC) Protocol Specification (Release 16), which is incorporated herein by reference in its entirety and hereinafter also referred to as "3GPP TS 38.331".

[0042] Additionally or alternatively, the serving cell mobility information 320 may be transmitted to the wireless terminal 116 via dedicated signaling, such as radio resource control (RRC) signaling in accordance with 3GPP TS 38.331. In the case of RRC dedicated signaling, an RRC message such as an RRCReconfiguration message or an RRCRelease message may be used. Other types of signaling may also be used. 2.2 Serving cell mobility information: content

[0043] The serving cell mobility information 320 may include one or more attributes or elements indicating the mobility state of the serving cell. These attributes may be included in the information elements of the message transmitting the serving cell mobility information 320.

[0044] In an example implementation, one of these attributes may be a cell mobility indicator as a Boolean value, which indicates whether the cell is "mobile". For example, a base station installed on a vehicle to be moved (such as a bus, train, and taxi) may be set to a value or symbol indicating that the cell is "mobile", for example, the cell mobility indicator may be set to "mobile". For a fixed base station, or a base station installed on a vehicle but not moving (stationary), such as a temporary base station equipped in a truck used for an activity, the cell mobility indicator may be set to "stationary" (or "fixed" or "not moving"), or alternatively, the cell mobility indicator may not be present in the system information. Listing 1 shows an example implementation of an example cell mobility indicator cellMobilityIndicator included in the MIB, for example, the indicator may be included in a master information block (MIB). The wireless terminal 116 receiving the MIB may determine whether the cell is "mobile", for example, served by a mobile base station relay, based on the cell mobility indicator.

[0045]

[0046] In another example implementation, preferably using the MIB, the serving cell mobility information 320 may include a series of physical cell identifiers PCIs. In a 5G cellular system, 1008 unique PCIs are provided in the system, and one of the PCIs is encoded in the primary synchronization signal (PSS) and the secondary synchronization signal (SSS) broadcast in the cell. In this implementation, a selected set of PCIs or a series of PCIs may be reserved for mobile base station repeaters, referred to herein as "reserved PCIs". After selecting a cell, the wireless terminal 116 may decode the PSS and SSS to obtain the PCI of the cell, and then determine whether the PCI is included in the reserved PCI. If the determination is positive, the wireless terminal 116 may consider the cell to be "mobile", otherwise the cell is "stationary", such as a regular cell. In an example implementation, the reserved PCI may be predetermined or pre-configured to the wireless terminal 116. In another example implementation, the list of reserved PCIs may be broadcast in system information (such as MIB, SIB1, and / or other SIBs) and thereby received and known by wireless terminals 116.

[0047] In addition, the one or more attributes representing the mobility state of the serving cell may also include, but are not limited to, one or more of the following: (1) Current movement status, such as currently moving, currently not moving, able to move, etc.; (2) speed, such as speed in a certain direction, or speed level, such as high, medium, or low; (3) direction of movement; and (4) The current location of the cell, such as the location of the TRP.

[0048] A stationary cell, such as cell 108a and cell 108b, may choose to broadcast or not broadcast its own serving cell mobility information 320. In the event that such a stationary cell chooses to broadcast its own serving cell mobility information, the serving cell mobility information 320 may indicate a mobility state as "stationary". In the event that such a stationary cell chooses not to broadcast, a wireless terminal (e.g. Figure 3 The wireless terminal 116 may consider the cell to be "stationary" even if no specific cell mobility information is received. 2.3 Serving Cell Mobility Information: Operation

[0049] Figure 5 It is shown by Figure 3 Flowchart of example representative general basic steps or actions performed by a wireless terminal of an example embodiment and mode of the invention. Action 5-1 comprises receiving serving cell mobility information from a cell, such as Figure 3320 of the serving cell mobility information. In one example implementation, the serving cell mobility information may be included in a signal broadcast by the cell, such as a master information block (MIB), a system information block (SIB), and / or a primary / secondary synchronization signal (PSS / SSS). In another example implementation, the serving cell mobility information may be included in dedicated signaling, such as a radio resource control (RRC) message. Action 5-2 includes determining a mobility state of the cell based on the serving cell mobility information. The mobility state determination of action 5-2 may be performed by the mobile station relay processor 200 (e.g., by the mobility state determination controller 300). The mobility state of the cell may indicate whether at least one transmit and receive point (TRP) serving the cell is geographically mobile. For example, in a case where the base station serving the cell is a mobile base station relay, the cell mobility information of the serving cell may be set to "mobile". In a case where the base station serving the cell is a fixed base station (e.g., a fixed TRP), the cell mobility information of the serving cell may be set to "stationary". Although not in Figure 5 Specific examples are shown in FIG. 1 , but it should be understood that the wireless terminal 116 may perform further operations based on the received serving cell mobility information. For example, such further operations may include, for example, referring to Figures 11 to 14 The cell reselection determination / process is described in detail with reference to example embodiments and modes.

[0050] Figure 6 It is shown by Figure 3 Example embodiments and modes of access nodes (e.g., Figure 3 A mobile base station repeater 112 or such as Figure 3 Flowchart of example representative general basic steps or actions performed by a stationary / fixed base station of a carrier gNB 104a / 104b. Action 6-1 includes generating serving cell mobility information, such as Figure 3320 of serving cell mobility information. Action 6-2 includes transmitting the serving cell mobility information via a cell served by the access node. As described above, in one example implementation, the serving cell mobility information may be included in a signal broadcast by the cell, such as a master information block (MIB), a system information block (SIB), and / or a primary / secondary synchronization signal (PSS / SSS). In another example implementation, the serving cell mobility information may be included in dedicated signaling, such as a radio resource control (RRC) message. The wireless terminal 116 may use the serving cell mobility information to determine the mobility state of the cell. The mobility state of the cell may indicate whether at least one transmit and receive point (TRP) serving the cell is geographically mobile. For example, in the case where the access node serving the cell is a mobile base station repeater, the serving cell mobility information may be set to "mobile". In the case where the access node serving the cell is a fixed base station (e.g., a fixed TRP), the serving cell mobility information may be set to "stationary". 3.0 Neighboring Cell Mobility Information: Overview

[0051] In previous embodiments (e.g. Figures 3 to 6 In the exemplary implementation scheme and mode of the present invention, the serving cell mobility information is intended to indicate the mobility state of the cell broadcasting the cell mobility information, such as "mobile" or "stationary". Figures 7 to 10 In the communication system 100(7) of the example implementation and mode of the present invention, the serving cell may provide one or more instances of mobility information of neighboring cells. Such instances of mobility information of neighboring cells may be referred to herein as "neighboring cell mobility information". Each of the one or more instances of neighboring cell mobility information may be associated with a corresponding neighboring cell. Similar to Figures 3 to 6 Example implementations and modes of, when received from a serving cell, Figures 7 to 10 The wireless terminal of the example embodiments and modes may use one or more instances of neighbor cell mobility information for applications and / or processes, such as cell reselection. Preferably, the neighbor cell mobility information may be transmitted to the wireless terminal and received by the wireless terminal via system information, but other signaling and transmissions may also be utilized, such as the dedicated signaling disclosed in the previous example embodiments and modes. 3.1 Neighboring Cell Mobility Information: Example Scenario

[0052] Figure 7 Exemplary operations and scenarios of example implementations and modes in which neighboring cell mobility information is transmitted are shown. Figure 7As shown, the wireless terminal 116 resides on a cell 108a served by a carrier gNB 104a via a wireless access link 402. The wireless terminal can obtain a list 400 of neighboring cells via the cell 108a. The list 400 of neighboring cells is preferably included in one or more system information blocks (SIBs) broadcast by the cell 108a, such as SIB3, SIB4, and SIB5. The list 400 of neighboring cells may include one or more identifiers (e.g., physical cell identifiers PCIs) of neighboring cells (such as cell 108b), and preferably may also include a radio band / frequency associated with each of some neighboring cells operating in an inter-frequency band. Figure 7 At the time when the mobile base station repeater 112 is shown by the dashed line, the mobile base station repeater 112 is not in the vicinity, for example, not yet in the coverage area of ​​the cell 108a, so the list 400 of neighboring cells may not include the identification of the cell 114. When the vehicle equipped with the mobile base station repeater 112 approaches the cell 108a, such as Figure 7 At the moment when the mobile base station relay 112 is depicted in solid lines, the mobile base station relay 112 may establish a wireless backhaul link 110 to the carrier gNB 104a. The establishment of the wireless backhaul link 110 may trigger the carrier gNB 104a to update the list of neighboring cells 400, thereby generating an updated list of neighboring cells 400' and starting to broadcast the updated list of neighboring cells 400'.

[0053] The updating of the list of neighboring cells may include adding the identity of cell 114 to the list of neighboring cells 400', as well as removing or adding any other cell identities that may be appropriate at the time. In some cases, the list of neighboring cells 400 may include only one neighboring cell, e.g. Figure 7 A cell 114 of a mobile base station repeater 112 is shown.

[0054] exist Figure 7 In a specific implementation of the example embodiments and modes of the present invention, the list of neighboring cells may be associated with one or more instances of neighboring cell mobility information 406 to indicate the mobility status of one or more corresponding neighboring cells. For example, one or more of the cells listed in the list of neighboring cells 400' may be mobile cells, such as cells having mobile base station relays 112, and for each such mobile cell, the list may include or point to neighboring cell mobility information 406, such as Figure 7 As shown and described below with reference to the example in Listing 2.

[0055] Alternatively or additionally, the carrier gNB 104a may transmit (e.g., broadcast) neighbor cell mobility information in other forms, such as without utilizing a neighbor cell list. For example, the carrier gNB 104a may send a signal or SSB to the wireless terminal 116 that provides neighbor cell mobility information for the cell 114 served by the mobile base station relay 112 without reference to other cells. 3.2 Neighbor Cell Mobility Information: Example Node

[0056] Figure 8 An example implementation and mode communication system 100(7) is shown, in which a carrier gNB is shown, for example, which transmits neighbor cell mobility information in the form of a list 400 of neighbor cells or otherwise. Figure 7 and Figure 8 The structure and function of the exemplary embodiments and modes are Figure 1 and Figure 2 The structures and functions shown by corresponding reference numerals in the drawings are substantially the same, unless otherwise specified or obvious from the context. Figure 7 and Figure 8 In an example embodiment and mode of the present invention, the carrier gNB 104a includes a neighbor cell mobility state information generator 410. Using its neighbor cell mobility state information generator 410, the carrier gNB 104a can inform the wireless terminal 116 of information about the mobility of one or more neighbor cells. Specifically, the carrier gNB 104a can transmit the neighbor cell mobility information 406 to the wireless terminal 116. Figure 8 As shown, the neighbor cell mobility state information generator 410 of the carrier gNB 104a may be implemented as part of or by the carrier gNB 104a processor 424, as described below. The carrier gNB 104a preferably obtains the neighbor cell mobility information it transmits from the core network.

[0057] Figure 8A wireless access node, such as a carrier gNB 104a, is shown, which in one example implementation includes a central unit 420 and a distributed unit 422. The centralized unit 420 and the distributed unit 422 may be implemented by, for example, one or more processor circuits (e.g., a node processor 424), such as being composed of or including one or more processor circuits. The centralized unit 420 and the distributed unit 422 may share one or more node processors 424, or each of the centralized unit 420 and the distributed unit 422 may include one or more node processors 424. In addition, the centralized unit 420 and the distributed unit 422 may be co-located at the same node site, or alternatively, one or more distributed units 422 may be located at a site remote from the centralized unit 420 and connected thereto via a packet network. The distributed unit 422 may include a transceiver circuit 426, which in turn may include a transmitter circuit 427 and a receiver circuit 428. The transceiver circuit 426 may include an antenna for wireless transmission. The transmitter circuit 427 may include, for example, an amplifier, a modulation circuit, and other conventional transmission equipment. Receiver circuit 428 may include, for example, amplifiers, demodulation circuits, and other conventional receiver equipment. Figure 8 As further shown, the node processor 424 of the gNB 104a may include a neighboring cell mobility state information generator 410.

[0058] Figure 8 The wireless terminal processor 290 is shown as including a neighbor cell mobility state determination controller 430. The neighbor cell mobility state determination controller 430 may process and may act upon neighbor cell mobility information 406 received by the wireless terminal 116 via the transceiver circuitry 276. For example, the neighbor cell mobility information 406 may also be used by applications and / or processes running on the wireless terminal 116. One example of the use of the neighbor cell mobility information 406 is cell reselection. 3.3 Neighboring Cell Mobility Information: Example Information Content

[0059] In an example implementation, the neighbor cell mobility information 406 may include one or more attributes, elements, or attributes representing mobility states, such as Figures 3 to 6 That is, the one or more attributes or elements may include the aforementioned cell mobility indicator, and may also include other attributes such as speed, direction and location.

[0060] Listing 2 shows an example implementation in which SIB3 provides information about intra-frequency neighbor cells, where an optional information element cellMobilityInfo may be associated with each of a number of neighbor cells listed in intraFreqNeighCellList. The information element cellMobilityInfo may be included in Figures 3 to 6 The cell mobility indicator cellMobilityIndicator disclosed in the example implementation and mode of , and may also include the cell mobility speed class cellMobilitySpeedClass, direction cellMobilityDirection and position cellPosition of the cell. This example implementation can be applied in a similar manner to SIB4 (although not shown as such) providing a list of inter-frequency neighboring cells and / or SIB5 (also shown) providing a list of inter-radio access technology RAT neighboring cells.

[0061]

[0062] In this example embodiment, after updating the list of neighboring cells, the carrier gNB 104a may add an instance of IntraFreqNeighCellInfo to the IntraFreqNeighCellList, where the instance may include a physCellId set to the PCI of the cell 114 and a cellMobilityInfo including a cellMobilityIndicator set to "mobile", and may also include other optional attributes, elements. When the mobile base station relay 112 moves away from the cell 108a, the carrier gNB 104a may remove the instance of IntraFreqNeighCellInfo from the IntraFreqNeighCellList.

[0063] It should be understood that Figures 7 and 8 Example implementations and modes can be used as Figures 3 to 6 For example, the MIB may include serving cell mobility information with only a cell mobility indicator, while one or more SIBs may include neighboring cell mobility information with other attributes (e.g., speed, direction, etc.). For example, in the case where the reserved PCI cannot be allocated, Figures 7 and 8 The example embodiments and modes can also be used as Figures 3 to 6 Example embodiments and mode alternatives. 3.4 Neighboring Cell Mobility Information: Example Operation

[0064] Fig. 9 It is shown by Figures 7 and 8Flowchart of example representative steps or actions performed by wireless terminal 116 of example embodiments and modes of the present invention. Action 9-1 includes receiving neighboring cell mobility information from a serving cell, such as Figure 7 and Figure 8 The neighboring cell mobility information 406, wherein the neighboring cell mobility information may be associated with the neighboring cell identifier (such as Figure 7 Such identification of the neighboring cell may be included in Figure 7 In a list 400 of neighboring cells. In one example implementation, the neighboring cell mobility information may be included in one or more system information blocks (SIBs). In another configuration, the neighboring cell mobility information may be included in dedicated signaling, such as a radio resource control (RRC) message.

[0065] Action 9-2 includes determining a mobility state of a neighboring cell based on the neighboring cell mobility information. The mobility state may include an indication of whether at least one transmit and receive point (TRP) serving the neighboring cell is geographically mobile. For example, in the case where the base station serving the neighboring cell is a mobile base station repeater, the cell mobility indicator may be set to "mobile". In the case where the base station serving the neighboring cell is a fixed base station (e.g., a fixed TRP), the cell mobility indicator may be set to "stationary". The mobility state may also include the speed, direction and / or position of the neighboring cell.

[0066] Fig.10 is a diagram showing an access node (eg, Figure 7 A mobile base station repeater 112 or such as Figure 7 Flowchart of example representative steps or actions performed by a stationary / fixed base station of a carrier gNB 104a / 104b. Action 10-1 includes generating neighboring cell mobility information, such as Figure 7 The neighboring cell mobility information 406, wherein the neighboring cell mobility information may be associated with the neighboring cell identifier (such as Figure 7 Such identification of the neighboring cell may be included in Figure 7 In the list 400 of neighboring cells.

[0067] Action 10-2 includes sending a signal to a wireless terminal (eg, Figure 7The wireless terminal 116) transmits neighboring cell mobility information. In one example implementation, the neighboring cell mobility information may be included in one or more system information blocks (SIBs). In another example implementation, the neighboring cell mobility information may be included in dedicated signaling, such as a radio resource control (RRC) message. The wireless terminal may use the neighboring cell mobility information to determine the mobility state of the neighboring cell. The mobility state may include an indication of whether at least one transmit and receive point (TRP) serving the neighboring cell is geographically mobile. For example, in the case where the base station serving the neighboring cell is a mobile base station repeater, the cell mobility indicator may be set to "mobile". In the case where the base station serving the neighboring cell is a fixed base station (e.g., a fixed TRP), the cell mobility indicator may be set to "stationary". The mobility state may also include the speed, direction and / or position of the neighboring cell. 4.0 Cell Reselection Based on Cell Mobility Information: Overview

[0068] Figures 11 to 14 Example embodiments and modes of the present invention describe example uses of cell mobility information for a wireless terminal to perform a cell reselection procedure, which are referenced in Figures 3 to 6 The serving cell mobility information disclosed in the example embodiments and modes of Figures 7 to 10 Any or both of the neighboring cell mobility information disclosed in the example embodiments and modes of Figures 11 to 14 , the terms "mobility information" and "cell mobility information" which may be used interchangeably cover either or both of serving cell mobility information and neighboring cell mobility information.

[0069] As mentioned above, the conventional cell reselection process may be designed based on the assumption that the cell is stationary. When a cell is "stationary", the TRP of the stationary cell does not move. However, in cases where this assumption does not hold, such as when the cell is physically / geographically mobile, the cell reselection process may need to take into account the mobility of the cell. 4.1 Cell Reselection Based on Cell Mobility Information: Example Scenario

[0070] Fig.11 An example scenario of this situation is shown, where a wireless terminal 116 in an idle state (e.g., RRC_IDLE) or in an inactive state (e.g., RRC_INACTIVE) may first camp on the cell 108a. Fig.11 is shown as a stationary cell. Fig.11In the embodiment of the present invention, mobile base station repeater 112 is carried by or mounted on a vehicle. When a vehicle equipped with mobile base station repeater 112 approaches wireless terminal 116, wireless terminal 116 may discover cell 114 served by mobile base station repeater 112. The likelihood that wireless terminal 116 is expected to reselect cell 114 can be configured based on the mobility of cell 114, e.g., depending on the degree and nature of the mobility of cell 114. For example, in some cases, it may be expected that wireless terminal 116 is more likely to reselect cell 114 if wireless terminal 116 is riding in a vehicle carrying mobile base station repeater 112. In other cases, it may be expected that wireless terminal 116 is more likely to stay on cell 108a (stationary macrocell) while wireless terminal 116 is not in a vehicle carrying mobile base station repeater 112, particularly when the vehicle carrying mobile base station repeater 112 is moving at high speed.

[0071] exist Fig.11 In the exemplary embodiment and mode of the present invention, the mobile base station repeater 112 (specifically, Figure 2 The transmitter 224 of the wireless access link 118 may broadcast the cell mobility information of the cell 114. The cell mobility information is transmitted on the wireless access link 118. Fig.11 In an example embodiment and mode of the present invention, it may be preferable to use MIB or PSS / SSS to carry the cell mobility information of cell 114, because such signals are first detected when wireless terminal 116 discovers the cell. Wireless terminal 116 that receives the cell mobility information may use the mobility indicator included in the cell mobility information to change the cell reselection process, as disclosed below. 4.2 Cell Reselection Based on Cell Mobility Information: Example Node

[0072] Fig.12 Shows Fig.11 Example embodiments and example structures and functions of a communication system 100 (11) are shown in which a radio access network includes a carrier gNB node 104 and a mobile base station relay 112, either of which can transmit cell mobility information and cell reselection configuration information. Fig.11 and Fig.12 The structure and function of the exemplary embodiments and modes are substantially the same as those shown by corresponding reference numerals in the preceding figures, unless otherwise specified or apparent from the context. Fig.11 and Fig.12In an example implementation and mode, the carrier gNB 104a includes a cell mobility state information generator 500A and a cell reselection configuration information generator 502A. One or more (and preferably both) of the cell mobility state information generator 500A and the cell reselection configuration information generator 502A may be implemented as part of or by the node processor 424 of the carrier gNB 104a. Specifically, the carrier gNB 104a may transmit the cell mobility information 508 generated by the cell mobility state information generator 500A to the wireless terminal 116 as cell mobility state information 508A, and transmit the cell reselection configuration generated by the cell reselection configuration information generator 502A to the wireless terminal 116 as cell reselection configuration 510A.

[0073] Fig.11 and Fig.12 The mobile base station relay 112 is also shown as including a cell mobility state information generator 500B and a cell reselection configuration information generator 502B. One or more (and preferably both) of the cell mobility state information generator 500B and the cell reselection configuration information generator 502B of the mobile base station relay 112 may be implemented as part of or by the mobile station relay processor 200, such as by the relay controller 202. The mobile base station relay 112 may transmit the cell mobility information generated by the cell mobility state information generator 500B to the wireless terminal 116 as cell mobility state information 508B, and transmit the cell reselection configuration generated by the cell reselection configuration information generator 502B to the wireless terminal 116 as cell reselection configuration 510B.

[0074] like Fig.12 As shown, the wireless terminal 116 may receive either or both of the cell mobility state information 508A and the cell mobility state information 508B generated by the carrier gNB 104a and the mobile base station relay 112, respectively, and / or either or both of the cell reselection configuration 510A and the cell reselection configuration 510B generated by the carrier gNB 104a and the mobile base station relay 112, respectively. As used herein, the cell mobility state information 508 generally refers to either or both of the cell mobility state information 508A or the cell mobility state information 508B; and the cell reselection configuration 510 generally refers to either or both of the cell reselection configuration 510A or the cell reselection configuration 510B.

[0075] The wireless terminal 116 includes a cell reselection controller 530. The cell reselection controller 530 may use the cell mobility state information 508 and the cell reselection configuration 510 to perform a cell reselection procedure as described herein. The cell reselection controller 530 may be part of or implemented by the wireless terminal processor 290. 4.3 Cell Reselection Based on Cell Mobility Information: Example Operation

[0076] Fig.11 The example scenario depicts a situation where the wireless terminal 116 reselects the mobile cell 114 from the stationary cell 108a, for example, when the wireless terminal 116 is in the stationary cell 108a but is about to leave the stationary cell. First, the wireless terminal 116 can obtain the current serving cell, the cell reselection configuration 510 from the cell 108a via the system information broadcast on the wireless access link 518. The cell reselection configuration 510 may include parameters to be used to evaluate candidate cells, such as thresholds, offset values, timer values, and / or counter values. In addition, Figures 11 to 14 The cell reselection configuration 510 of the example implementation and mode may also include a set of parameters designated for evaluating cells with a mobility state of "mobile". This set of parameters, referred to as "reselection parameters for mobile cells", may take effect when the wireless terminal 116 discovers a "mobile" cell such as cell 114, but on the other hand, this set of parameters may not take effect when the wireless terminal 116 discovers a "non-mobile" cell (e.g., a "stationary" or "fixed" cell) such as cell 108b. Fig.11 In the scenario, the wireless terminal 116 residing on the cell 108a may (1) eventually discover that the "mobile" cell 114 is approaching the wireless terminal 116, (2) receive a broadcast signal on the wireless access link 118, (3) obtain cell mobility information indicating that the cell is "mobile", (4) evaluate the cell 114 based on the cell reselection configuration and the reselection parameters of the mobile cell, and (5) ultimately make a decision whether to reselect the cell 114.

[0077] like Fig.11 As shown, the cell mobility information may be transmitted from the mobile base station relay 112 to the wireless terminal 116 via the cell mobility information 522A. The cell mobility information 522A transmitted from the mobile base station relay 112 may be transmitted in Figures 3 to 6 The serving cell mobility information disclosed in the example embodiments and modes of the present invention provides the mobility status of the serving cell, which in this illustration is cell 114. Additionally or alternatively, the cell mobility information may also be transmitted from the carrier gNB 104a. The cell mobility information transmitted from the carrier gNB 104a is transmitted in Fig.11 is shown as cell mobility configuration 522B and may be in Figures 7 to 10 The neighbor cell mobility information disclosed in the example embodiments and modes of the present invention also indicates the mobility status of a neighbor cell (eg, cell 104 served by mobile base station relay 112).

[0078] In a typical cellular network, cell reselection may be performed based on predetermined / preconfigured criteria. For example, 3rd Generation Partnership Project 3GPP TS 38.304 V16.2.0 (2020-09); Technical Specification Group Radio Access Network; NR; User Equipment (UE) Procedures in Idle Mode and RRC, Inactive State (Release 16) (hereinafter "3GPP TS 38.304", which is incorporated herein by reference) specifies the cell ranking criteria as shown in Listing 3.

[0079] List 3 The cell ranking criterion R for serving cells s and R for neighboring cells n Defined by: in, R s =Q meas,s +Q hyst -Qoffset temp R n =Q meas,n -Qoffset-Qoffset temp in, The UE shall perform ranking on all cells that satisfy the cell selection criterion S, which is defined in Section 5.2.3.2 of 3GPP TS 38.304. By exporting Q meas,n and Q meas,s The average RSRP result is used to calculate the R value and rank the cells according to the R criteria specified above. If rangeToBestCell is not configured, the UE shall perform cell reselection to the highest ranked cell. If this cell is found unsuitable, the UE shall operate in accordance with clause 5.2.4.4 of 3GPP TS 38.304. If rangeToBestCell is configured, the UE shall perform cell reselection to the cell with the highest number of beams above the threshold (i.e., absThreshSS-BlocksConsolidation) among the cells whose R value is within the ToBestCell range of the R value of the highest ranked cell. If there are multiple such cells, the UE shall perform cell reselection to the highest ranked cell among them. If the cell is found to be unsuitable, the UE shall operate in accordance with clause 5.2.4.4 of 3GPP TS 38.304. In all cases, the UE will reselect a new cell only if the following conditions are met: -Treselection in time interval RAT During this period, the new cell is better than the serving cell according to the cell reselection criteria specified above; - More than 1 second has passed since the UE camped on the current serving cell. NOTE: If rangeToBestCell is configured on an NR frequency but absThreshSS-BlocksConsolidation is not configured, the UE considers that there is one beam above the threshold for each cell on that frequency. Treselection RAT This specifies the cell reselection timer value. For each target NR frequency and for each RAT other than NR, a specific value of the cell reselection timer is defined, which applies when evaluating reselection within NR or towards other RATs, e.g. Treselection for NR RAT Treselection NR , for E-UTRAN it is Treselection EUTRA . Note: TreselectionRAT is not broadcast in system information, but is used by the UE in the reselection rules for each RAT. Treselection NR This specifies the cell reselection timer value Treselection for NR RAT This parameter may be set for each NR frequency as specified in 3GPP TS 38.331[3].

[0080] As Figures 11 to 14 In an exemplary embodiment and exemplary implementation of the mode, the reselection parameters of the mobile cell may include a timer value T reselectionVMR The timer can be used to distinguish between the possibility of reselecting a mobile cell and the possibility of reselecting a stationary cell. The timer can also be used to distinguish between the possibility of a wireless terminal in a vehicle reselecting a mobile cell installed on the vehicle carrying the wireless terminal and the possibility of a wireless terminal not in the vehicle reselecting the mobile cell. Fig.11 In the scenario of T, if the wireless terminal 116 is on and stays in the vehicle carrying the mobile base station repeater 112, it is expected that the signal from the mobile base station repeater 112 can be stable for a relatively long time, while when the wireless terminal 116 is outside the vehicle carrying the mobile base station repeater 112, the wireless terminal 116 will eventually lose the signal as the vehicle moves away.reselectionVMR Set to T reselectionNR or T reselectionEUTRA longer, thereby encouraging wireless terminals in the vehicle to reselect the "mobile" cell, while discouraging wireless terminals outside the vehicle.

[0081] In another exemplary implementation, the reselection parameters for the mobile cell may include one or more offset values. For example, in the case where a neighboring cell is "mobile" (e.g., cell 114) while the wireless terminal is camped on cell 104a, the offset value Q may be set to VMRn The following applies to the cell reselection criteria R in List 1: n : R n =Q meas,n -Qoffset-Qoffset temp -Qv MRn

[0082] Therefore, wireless terminal 116 may reselect a "mobile" cell only if the signal strength / quality from that cell is strong enough.

[0083] Additionally or alternatively, in the case where the serving cell is mobile (e.g., cell 114 is the serving cell of wireless terminal 116), one or more offset values ​​for encouraging wireless terminal 116 to stay on the mobile serving cell (e.g., cell 114) may be configured as part of the reselection parameters for the mobile cell. For example, the offset value Q VMR The cell reselection criteria R in List 1 can be used as follows s : R s =Q meas,s +Q hyst -Qoffset temp +Q MRs

[0084] In doing so, once wireless terminal 116 reselects cell 114, it is likely to remain camped on cell 114.

[0085] Fig.13 It is shown by Figures 11 to 14Flowchart of example representative steps or actions performed by a wireless terminal 116 of an example embodiment and mode of the present invention. Action 13-1 includes camping on a serving cell. Action 13-2 includes receiving a cell reselection configuration from a serving cell. Action 13-3 includes receiving cell mobility information, the cell mobility information including an indication of whether at least one transmit and receive point (TRP) serving a corresponding cell is geographically mobile. Action 13-4 includes performing a cell reselection process to determine whether to reselect a neighboring cell based on the cell reselection configuration and the cell mobility information. Action 13-4 may be performed by a cell reselection controller 530. In one example implementation, the corresponding cell is a serving cell. In this example implementation where the corresponding cell is a serving cell, cell mobility information may be received from the serving cell. In another example implementation, the corresponding cell is a neighboring cell. In this example implementation where the corresponding cell is a neighboring cell, cell mobility information may be received from the serving cell or the neighboring cell. In addition, the cell reselection configuration may include one or more parameters designated for evaluating the corresponding cell during the cell reselection process.

[0086] Fig.14 is shown by an access node (such as Fig.11 A mobile base station repeater 112 or such as Fig.11 Flowchart of example representative steps or actions performed by a stationary / fixed base station (such as a carrier gNB104a / 104b) that communicates with a wireless terminal (such as Fig.11 Action 14-1 includes generating a cell reselection configuration and cell mobility information. The cell mobility information may be as described in Figures 3 to 6 The serving cell mobility information disclosed in the example embodiments and modes of Figures 7 to 10 Any or both of the neighboring cell mobility information disclosed in the example embodiments and modes of . The information of action 14-1 may be generated by the cell mobility state information generator 500A and the cell reselection configuration information generator 502A at the carrier gNB 104a, and / or by the cell mobility state information generator 500B and the cell reselection configuration information generator 502B at the mobile base station relay 112.

[0087] Action 14-2 includes transmitting a cell reselection configuration and cell mobility information in a serving cell. The wireless terminal may use the cell reselection configuration and the cell mobility information to perform a cell reselection procedure to determine whether the wireless terminal reselects a neighboring cell. In other words, the cell reselection configuration and the cell mobility information are configured to be used by the wireless terminal to perform a cell reselection procedure to determine whether the wireless terminal reselects a neighboring cell. In addition, the mobility state may include an indication of whether at least one transmit and receive point (TRP) serving the corresponding cell is geographically mobile. The corresponding cell may be a serving cell or a neighboring cell. In addition, the cell reselection configuration may include one or more parameters designated for evaluating the corresponding cell during the cell reselection procedure. 5.0 Relative mobility information of adjacent cells

[0088] The aforementioned embodiments (e.g. Figures 11 to 14 The example embodiments and modes of the present invention focus on scenarios and operations in which cell mobility information indicates the mobility state of a cell of interest. The cell mobility information of the aforementioned embodiments may be of two types, namely serving cell mobility information or neighboring cell mobility information. Of these two types, the serving cell mobility information indicates the mobility state of a serving cell (e.g., a cell broadcasting the serving cell mobility information), while the neighboring cell mobility information indicates the mobility state of a neighboring cell. In principle, the "mobility state" means a mobility state relative to the ground (e.g., relative to a fixed geographic or land coordinate).

[0089] exist Figures 15 to 18 In an example embodiment and mode of the present invention, information indicating relative movement between two cells is disclosed. This information may be transmitted by a serving cell to one or more wireless terminals camped on the serving cell, explicitly or implicitly, to indicate, for example, relative mobility / movement of a neighboring cell. In this document, such information indicating relative movement between two cells is referred to as "neighboring cell relative mobility information". 5.1 Cell Reselection Based on Relative Mobility Information of Neighboring Cells: Example Scenario

[0090] Fig.15 An example scenario in which the relative mobility information of neighboring cells may be employed is shown. Fig.15 Similar to previously disclosed scenarios such as Figure 3 , Figure 7 and Fig.11 However, in Fig.15In the example deployment scenario, two mobile base station repeaters 112A and 112B move together, such as moving together or moving together, and serve cells 114A and 114B, respectively. For example, the two mobile base station repeaters 112A and 112B move at the same speed in the direction depicted by arrow 120. In the example deployment scenario, the mobile base station repeaters 112A and 112B can be deployed in different cars of the same train. Fig.15 In the scenario of FIG. 1 , the wireless terminal 116 initially camps on the cell 114A, where the wireless terminal may receive (1) the aforementioned list of neighboring cells 400; (2) the cell reselection configuration 510; and (3) cell mobility information 600. The cell mobility information 600 may include the serving cell mobility information 320 and / or the neighboring cell mobility information 406. In addition, the wireless terminal 116 of this embodiment and mode may also receive (4) neighboring cell relative mobility information 602 from the cell 114A via the wireless access link 118A, which may indicate the relative mobility / movement of each neighboring cell (such as cell 114B and cell 114C). Cell 114C is shown as being served by a mobile base station repeater 112C, which is shown as traveling in a direction 120′ that is different from the direction 120. The transmission and reception of cell reselection configurations, cell mobility information, and neighbor cell relative mobility information may occur in a number of ways, for example, one or more of such configurations / information being included in the list 400 of neighbor cells. 5.2 Cell Reselection Based on Relative Mobility Information of Neighboring Cells: Example Node

[0091] Fig.16 Shows Fig.15 An example structure and functionality of an example implementation and mode communication system 100 (15) is shown in which a radio access network includes a carrier gNB node 104, a mobile base station relay 112 and a wireless terminal 116. Fig.16 The mobile base station repeater 112 shown may represent Fig.15 Any one of the mobile base station repeaters, such as mobile base station repeater 112A, mobile base station repeater 112B and mobile base station repeater 112C. Fig.15 and Fig.16 The structure and function of the example embodiments and modes are substantially the same as those shown by corresponding reference numerals in the preceding figures, unless otherwise stated or apparent from the context.

[0092] As in the previous embodiments and modes, the mobile base station relay 112 includes a gNB controller 201; a relay controller 202; and a mobile terminal (MT) function 204. The gNB controller includes a transmit and receive point (TRP) 222, which in turn includes a transmitter 224 and a receiver 226.

[0093] exist Fig.15 and Fig.16 In an example embodiment and mode of the present invention, the mobile base station relay 112 includes a neighboring cell relative mobility information generator 612 and a cell reselection configuration generator 614. The cell reselection configuration 510 generated by the cell reselection configuration generator 614 may include one or more cell reselection parameters. One or both of the neighboring cell relative mobility information generator 612 and the cell reselection configuration generator 614 may be implemented as part of or by the node processor 200 of the mobile base station relay 112. Specifically, the mobile base station relay 112 may transmit the neighboring cell relative mobility information 602 generated by the neighboring cell relative mobility information generator 612 to the wireless terminal 116. The mobile base station relay 112 may optionally transmit the cell reselection configuration 510 generated by the cell reselection configuration generator 614 to the wireless terminal 116.

[0094] exist Fig.15 and Fig.16 In an example embodiment and mode of the present invention, the node processor 200 of the mobile base station relay 112 is configured to generate at least one message including an identification of a neighboring cell and neighboring cell relative mobility information indicating a mobility state of the neighboring cell relative to the serving cell. The transmitter 224 is configured to transmit the message from the serving cell to the wireless terminal. As explained herein, the wireless terminal uses the neighboring cell relative mobility information to perform a cell reselection process. This cell reselection process may result in reselection of a neighboring cell.

[0095] The mobile base station relay 112 may transmit the neighbor cell relative mobility information 602 in a broadcast signal or in system information, such as in a master information block, MIB, or in one or more other system information blocks (SIBs).

[0096] As in the previous embodiments and modes, the wireless terminal 116 includes a transceiver circuit 276 and a node processor 290. The transceiver circuit 276 includes a terminal transmitter circuit 277 and a terminal receiver circuit 278.

[0097] exist Figures 15 to 18 In an embodiment and mode of the present invention, the wireless terminal 116 includes a cell reselection controller 630. The cell reselection controller 630 can use the neighbor cell relative mobility information 602 to perform a cell reselection process as described herein. The cell reselection controller 630 can be implemented as part of the wireless terminal processor 290 or by the processor.

[0098] exist Figure 15 to Figure 16In an embodiment and mode of the present invention, the receiver circuit 278 is configured to receive at least one message from the serving cell, the at least one message including an identification of a neighboring cell and neighboring cell relative mobility information indicating a mobility state of the neighboring cell relative to the serving cell. The node processor 290 (e.g., the cell reselection controller 630) is configured to perform a cell reselection process based on the neighboring cell relative mobility information, as explained herein. Such a cell reselection process may result in reselection of a neighboring cell.

[0099] In an example implementation, a neighboring cell may be mobile relative to a serving cell if at least one transmit and receive point TRP 222 of the neighboring cell moves relative to at least one TRP 222 of the serving cell. Conversely, a neighboring cell may be considered stationary relative to a serving cell if at least one transmit and receive point TRP 222 of the neighboring cell does not move relative to at least one TRP 222 of the serving cell. 5.3 Cell Reselection Based on Relative Mobility Information of Neighboring Cells: Example Operation

[0100] In one example implementation, the neighboring cell relative mobility information 602 transmitted by the mobile base station repeater 112A via the cell 114A may include an indication, such as a relative mobility indication, regarding each of some or all of the cells included in the list 400 of neighboring cells. Such relative mobility indications may represent or indicate whether each of some or all of the neighboring cells is stationary or moving relative to the cell 114A. For example, a relative mobility indication of a cell 114B served by a mobile base station repeater 112B that moves with the mobile base station repeater 112A may indicate that the cell 114B is stationary relative to the cell 114A. On the other hand, a relative mobility indication of a cell 114C served by a mobile base station repeater 112C installed in a different vehicle may indicate that the cell 112C is relatively moving relative to the cell 114A.

[0101] As an exemplary implementation, a relative mobility indicator of each of some or all of the cells included in the list of neighboring cells (e.g., the list of neighboring cells 400) may be included as part of the above-mentioned neighboring cell mobility information 406. Listing 4 shows an example format of a system information block such as a system information block SIB3. In the example format of SIB3 shown in Listing 4, for each neighboring cell in the list of neighboring cells 400, the cell mobility information 600 optionally includes neighboring cell relative mobility information 602. For example, in Listing 4, each cell is represented by an information element IntraFreqNeighCellInfo, the list of neighboring cells 400 is represented by an information element IntraFreqNeighCellList, the cell mobility information 600 is represented by an information element CellMobilityInfo, and the optional field neighboring cell relative mobility information 602 is represented by an information element cellRelativeMobilityIndicator. In the example format of Listing 4, the information element cellRelativeMobilityIndicator indicates whether the cell specified by IntraFreqNeighCellInfo is relatively stationary or moving relative to the serving cell broadcasting SIB3.

[0102]

[0103] In the format shown in Listing 4, the indicator "cellRelativeMobilityIndicator" may be relevant only when both the serving cell and the corresponding neighboring cell are moving. Therefore, the neighboring cell relative mobility information 602 of the corresponding neighboring cell may be optionally present, for example, it may be present only when the serving cell mobility information indicates that the serving cell is moving and the neighboring cell mobility information also indicates that the neighboring cell is moving.

[0104] Table 1 shows the Fig.15The serving cell mobility information 320 may indicate that the serving cell 114A is moving, while the neighboring cell mobility information 602 may indicate that the two neighboring cells (cell 114B and cell 114C) are moving, and may also indicate that the cells 108a and 108b are stationary, for example, relative to the ground. In addition, the indicator cellRelativeMobilityIndicator expressed as "relative mobility" in Table 1 and also referred to as the neighboring cell relative mobility information 602 herein may indicate that the cell 114B, which moves together with the cell 114A, is relatively stationary, while the cell 114C is relatively moving because the cell 114C also moves but not together with the cell 114A, for example, the cell 114C moves differently from the cell 114A. In "differently" moving, the cell 114C moves at a different rate or in a different direction than the reference cell (e.g., the cell 114A). An indicator (eg, neighbor cell relative mobility information 602) for cell 108a or cell 108b may not be present, eg, may be omitted, because they are stationary cells.

[0105] Table 1 Community Mobility Relative mobility Cell 114A (serving cell) move not applicable Cell 114B (neighboring cell) move still Cell 114C (neighboring cell) move move Cell 108a (neighboring cell) still Does not exist Cell 108b (neighboring cell) still Does not exist

[0106] In a similar manner, Table 2 shows Fig.15 The cell 114C broadcasts information about cell mobility (eg, cell mobility information 600), where “mobile” neighboring cells (eg, cells 114A and 114B) move relative to the cell 114C.

[0107] Table 2 Community Mobility Relative mobility Cell 114C (serving cell) move not applicable Cell 114A (neighboring cell) move move Cell 114B (neighboring cell) move move Cell 108a (neighboring cell) still Does not exist Cell 108b (neighboring cell) still Does not exist

[0108] In another configuration, neighbor cell relative mobility information (such as Fig.15 The neighboring cell relative mobility information 602 may also include additional parameters about the mobility / movement of the neighboring cell relative to the serving cell. For example, such parameters may include the relative speed / speed in a certain direction and / or speed level (e.g., high / medium / low) between the serving cell and the neighboring cell.

[0109] As an example implementation, when the wireless terminal is in an idle state (e.g., RRC_IDLE) or an inactive state (e.g., RRC_INACTIVE), the wireless terminal may use the neighbor cell relative mobility information 602 to improve the performance of the cell reselection process. Fig.15In the illustrated scenario, the wireless terminal 116 is camped on the cell 114A. The cell 114A may utilize the neighbor cell list 400 and the cell reselection configuration 510 (preferably together with the cell mobility information 600) to configure the wireless terminal 116 to perform a cell reselection procedure according to one or more of the previously disclosed embodiments. Figures 15 to 18 In an example implementation of the example embodiments and modes, the wireless terminal 116 may be further configured with neighboring cell relative mobility information 602. Thus, the wireless terminal may obtain the information shown in Table 1, which indicates that (1) the serving cell (e.g., cell 114A) is moving, (2) the neighboring cell 114B is moving and relatively stationary, (3) the neighboring cell 114C is moving but not relatively stationary, and (4) the other neighboring cells 108a and 108b are stationary. Based on information such as Table 1, the wireless terminal may treat cell 114B in a special or different manner during the cell reselection process. That is, the wireless terminal 116 may use the neighboring cell relative mobility information 602 as a factor in evaluating candidate cells for cell reselection. For example, the neighboring cell relative mobility information 602 may indicate that a candidate cell that moves relative to the serving cell and therefore may also move toward the wireless terminal 116 may be a better candidate than another cell that moves with the serving cell. In another example, the neighboring cell relative mobility information may be used to prioritize a candidate cell that moves with the serving cell over another candidate cell that moves relative to the serving cell. Example cell reselection scenarios and / or evaluation criteria for cell reselection scenarios are described below.

[0110] For example, the above embodiment discloses using a timer T reselectionVMR The timer can also be used to distinguish the possibility of a wireless terminal in a vehicle reselecting a mobile cell installed in the vehicle from the possibility of a wireless terminal not in the vehicle reselecting the mobile cell. Figures 15 to 18 In an example implementation of the example embodiments and modes, a wireless terminal configured by a serving cell with multiple timer configurations may select and invoke an appropriate timer based on the mobility of the current serving cell (e.g., serving cell mobility information 320) and the mobility of the neighboring cells (e.g., mobility to the ground and / or relative mobility) when evaluating neighboring cells. Five example scenarios are described below.

[0111] Case 1: The serving cell is stationary and the neighboring cell is also stationary, for example, stationary relative to the ground. In this case 1, a method such as T reselectionNR or T reselectionEUTRA The regular reselection timer is used to reselect a stationary neighboring cell. This is for example Figure 7, where the wireless terminal 116 camping on the cell 108a uses the conventional reselection timer T when evaluating the cell 108b. reselectionNR or T reselectionEUTRA .

[0112] Case 2: The serving cell is stationary and the neighboring cell is moving, for example, relative to the ground. In this case, the timer T reselectionVMR For example, a stationary cell 108a Fig.11 The wireless terminal 116 can use T reselectionVMR To evaluate the cell 114. As disclosed in the previous implementation, it can be assumed that T reselectionVMR T reselectionNR or T reselectionEUTRA Longer to prevent the wireless terminal from reselecting the moving neighboring cell unless the wireless terminal is bound to move with the moving neighboring cell.

[0113] Case 3: The serving cell is mobile and the neighboring cell is stationary, for example, stationary relative to the ground. In one example scenario, the timer T reselectionVMR Can be used to encourage wireless terminals inside vehicles covered by a serving cell to stay on the serving cell. In this case, for example, a wireless terminal stationed on a mobile cell 114 Figure 3 The wireless terminal 116 may use the timer T reselectionVMR To evaluate the stationary cell 108a or 108b. In another example scenario of the same situation, the wireless terminal may be configured to use a conventional timer T reselectionNR or T reselectionEUTRA This is based on the consideration that as long as the wireless terminal stays on the vehicle, the mobile service cell should be stable, so a shorter timer value is suitable for timely detecting that the wireless terminal leaves the vehicle.

[0114] Case 4: The serving cell moves, and the neighboring cell moves (e.g., moves relative to the ground) and moves relatively from the serving cell. In this case, the timer T reselectionVMR can be used for the same reasons as described in case 2, for example, to prevent camping on a neighboring cell. Fig.15 The wireless terminal 116 can use T reselectionVMR To evaluate cell 114C.

[0115] Case 5: The serving cell moves, and the neighboring cell moves (e.g., moves relative to the ground), but is relatively stationary relative to the serving cell. This case is similar to case 1 in terms of the relationship between the two cells, so the conventional reselection timer T can be used. reselectionNR or T reselectionEUTRA For example, a mobile cell 114A Fig.15The wireless terminal 116 can use T reselectionNR or T reselectionEUTRA To evaluate mobile cell 114B that co-moves with cell 114A.

[0116] Table 3 shows a summary of the above five cases, describing example timer configurations for cell reselection based on the mobility states of the serving cell and the neighboring cells and the relative mobility of the neighboring cells.

[0117] Table 3

[0118] In one example implementation, the cell selection timer to be used for each case of Table 3 may be predetermined or preconfigured to the wireless terminal. In another example implementation, the cell selection timer to be used for each case of Table 3 may be network configured by a base station serving the serving cell via system information broadcast. In this latter example implementation, the serving cell may include information indicating the cell reselection timer configuration in one or more master / system information blocks MIB / SIB, such as Table 3. Using the predetermined, preconfigured or network-configured cell reselection timer configuration, the wireless terminal may select and apply an appropriate timer when evaluating neighboring cells based on the mobility states of the serving cell and the neighboring cells and the relative mobility of the neighboring cells.

[0119] In addition, the group of cell reselection timers need not be limited to the above-mentioned timers, for example, need not be limited to T reselectionNR , T reselectionEUTRA and T reselectionVMR That is, in each case of Table 3, the predetermined, preconfigured or network configured cell reselection timer configuration may have the flexibility to assign any timer value. For example, a different timer configuration may be assigned to each case.

[0120] Thus, in general, neighbor cell relative mobility information, such as neighbor cell relative mobility information 602, can be used to differentiate the behavior / performance of the cell reselection process. For example, the wireless terminal can be configured with at least two groups of cell reselection configuration parameters: a first group can be used to evaluate neighbor cells whose relative mobility is stationary (e.g., co-mobile), and one or more other groups can be used to evaluate neighbor cells in other situations. Each group may include a cell reselection timer configuration, such as T reselectionVMR or T reselectionNR or T reselectionEUTRA , as disclosed above, and may also include cell reselection parameters, such as thresholds, offsets, etc., such as the previously disclosed Q meas,s , Q hyst , Q offsettemp and / or Q VMRn The values ​​of these parameters may differ between each group. If a neighboring cell (e.g. Fig.15 114B) and a serving cell (eg, Fig.15 If the wireless terminal moves together with the cell 114A of the wireless terminal, the cell reselection parameters in the first group may be used. Otherwise, a different set of cell reselection parameters may be used. The at least two sets of cell reselection parameters may be predetermined, preconfigured to the wireless terminal, or configured to the wireless terminal from the network, for example, through system information broadcast.

[0121] Fig.17 is shown by a wireless terminal such as Fig.15 17-1 includes receiving at least one message including an identification of a neighboring cell and relative mobility information of the neighboring cell from a serving cell. The relative mobility information of the neighboring cell indicates a mobility state of the neighboring cell relative to the serving cell. In one configuration, the mobility state includes an indication of whether the neighboring cell is stationary or moving relative to the serving cell. In another configuration, the mobility state also includes a speed or speed level of the neighboring cell relative to the serving cell. Action 17-2 includes performing a cell reselection process based on the relative mobility information of the neighboring cell. The cell reselection process may result in reselection of a neighboring cell. During the cell reselection process, a set of cell reselection parameters to be used for evaluating the neighboring cell may be determined based on the relative mobility information of the neighboring cell. The set of cell reselection parameters may include a timer configuration, a threshold value, or an offset value. The set of reselection parameters may be predetermined, preconfigured to the wireless terminal, or configured to the wireless terminal from the network.

[0122] Fig.18 is shown by an access node (e.g., Fig.15 18-1 includes generating at least one message including an identification of a neighboring cell and relative mobility information of the neighboring cell. The relative mobility information of the neighboring cell indicates a mobility state of the neighboring cell relative to the serving cell. In one configuration, the mobility state includes an indication of whether the neighboring cell is stationary or moving relative to the serving cell. In another configuration, the mobility state also includes a speed or speed level of the neighboring cell relative to the serving cell. Action 18-2 includes transmitting the message from the serving cell to the wireless terminal. The wireless terminal uses the relative mobility information of the neighboring cell to perform a cell reselection process. The cell reselection process may result in reselection of a neighboring cell. During the cell reselection process, a set of cell reselection parameters to be used for evaluating the neighboring cell may be determined based on the relative mobility information of the neighboring cell. The set of cell reselection parameters may include a timer configuration, a threshold value, or an offset value. The set of reselection parameters may be predetermined, preconfigured to the wireless terminal, or configured to the wireless terminal from the network. 6.0 Vehicle information of vehicle repeater

[0123] exist Figures 19 to 26 In the example embodiments and modes, "vehicle information" is provided by the vehicle-mounted repeater VMR to the wireless terminal served by the VMR. For the purpose of distinguishing VMRs and / or identifying a specific VMR, the vehicle information may be intended (e.g., selected, chosen, generated or formatted, etc.) to provide information representing a vehicle, a carrier or any other type of object on which the VMR is installed. "Vehicle information" is also referred to herein as vehicle-mounted repeater VMR vehicle information or "VMR vehicle information" because the vehicle information may belong to a vehicle carrying or installing a mobile base station repeater. As used herein, the expression "mobile base station repeater installed" also covers situations where the mobile base station repeater is carried on a vehicle or installed / carried in a vehicle. Vehicle information may also be referred to as vehicle identification information. Vehicle information may include, but is not limited to, one or a combination of the parameters / information elements listed in List 5.

[0124] List 5 The owner or operator of the vehicle, such as an individual name, company name, generic operator name, etc. Vehicle identification, such as train number, bus number, vehicle number such as vehicle identification number (VIN), etc. ·Vehicle routes, such as origin, destination, route number, timetable, etc. Type of vehicle, e.g. "train", "bus", "taxi", "private", etc. Vehicle route attributes, such as "fixed route", "non-fixed route", etc.

[0125] Fig.19 An example scenario is shown in which a vehicle-mounted repeater (VMR) provides "vehicle information" to a wireless terminal served by the VMR. For example, Fig.19 Shown based on Figure 1 An example communication system 100 (19) is shown in which vehicle information may be used. Specifically, Fig.19 The mobile station repeater 112 ( 19 ) is shown providing vehicle information 700 to a wireless terminal 116 ( 19 ) that is within the coverage area of ​​the cell 114 .

[0126] Fig. 20 Shows Fig.19 Example embodiments and modes of communication system 100(19) include example structures and functions. Fig. 20 A radio access network is shown, for example, including a carrier gNB node 104, a mobile base station relay 112 (19) and a wireless terminal 116 (19). Fig.19 The structure and function of the example embodiments and modes are substantially the same as those shown by corresponding reference numerals in the preceding figures, unless otherwise stated or apparent from the context.

[0127] As in the previous embodiments and modes, the mobile base station relay 112 (19) includes a gNB controller 201; a relay controller 202; and a mobile terminal (MT) function 204. The gNB controller includes a transmit and receive point (TRP) 222, which in turn includes a transmitter 224 and a receiver 226.

[0128] exist Fig.19 In the example embodiments and modes of Fig. 20 As shown in more detail, the mobile base station repeater 112 (19) includes a vehicle information memory 702 and a vehicle message generator 704. For example, the vehicle information memory 702 and / or the vehicle information message generator 704 may be implemented as part of or by the node processor 200 of the mobile base station repeater 112 (19), or may be implemented as a node processor 200 as described herein. Fig.26 The vehicle information 700 stored in the vehicle information memory 702 may be configured in the vehicle information memory 702, for example, pre-configured or input / stored therein via an interface (such as a user input device), or configured during use, such as by downloading or wirelessly receiving from another node or entity. The vehicle information message generator 704 is configured and operative to access the contents or data of the vehicle information memory 702 to generate a vehicle information message, for example Fig. 20 In various modes and embodiments, the vehicle information message generator 704 may include the vehicle information in a vehicle information message 706, which may take the form of a dedicated message, a broadcast signal, or system information, such as in a master information block MIB or in one or more other system information blocks (SIBs).

[0129] Fig. 20 The wireless terminal 116 (19) is shown as including a transceiver circuit 276. The transceiver circuit 276 may in turn include a transmitter circuit 277 and a receiver circuit 278. The transceiver circuit 276 may include an antenna 279 for wireless transmission. The transmitter circuit 277 may include, for example, amplifiers, modulation circuits, and other conventional transmission equipment. The receiver circuit 278 may include, for example, amplifiers, demodulation circuits, and other conventional receiver equipment.

[0130] Fig. 20The wireless terminal 116 (19) is also shown to include wireless terminal processor circuitry, such as one or more wireless terminal processors 290. The wireless terminal 116 (19) (e.g., wireless terminal processor 290) may include a frame / message generator / handler 294. The wireless terminal 116 (19) may also include an interface 292, including one or more user interfaces. Such user interfaces may be used for user input and output operations, and may include, for example, a screen such as a touch screen that may display information to a user and receive information input by a user. For example, the user interface 292 may also include other types of devices, such as a speaker, a microphone, or a tactile feedback device.

[0131] exist Figures 19 to 26 In an embodiment and mode of the present invention, the wireless terminal 116 (19) includes a cell (re)selection controller 630 (19). The cell (re)selection controller 630 (19) can use the vehicle information 700 to perform a cell selection process or a reselection process as described herein. In this document, "using" the vehicle information 700 to perform a cell selection process or a reselection process may include using the vehicle information as a standard input for the cell selection process or the reselection process. Since the controller 630 (19) can perform a cell selection process or a reselection process according to specific circumstances, the controller 630 (19) is referred to as a cell (re)selection controller 630 (19), where "(re)" indicates that a cell reselection can be performed if a cell has been previously selected. The cell (re)selection controller 630 (19) can be part of the wireless terminal processor 290 or implemented by the processor.

[0132] exist Figures 19 to 26 In an embodiment and mode of the present invention, the receiver circuit 278 is configured to receive vehicle information 700 from a serving cell, for example, at least one message including the vehicle information 700, such as a vehicle information message 706. The node processor 290 (e.g., the cell (re)selection controller 630 (19)) is configured to perform a cell reselection process based on the vehicle information 700, as explained herein. Such a cell reselection process may result in reselection of a neighboring cell. 6.1 Vehicle Information for Manual VMR Selection

[0133] Fig.21 An example implementation and mode and an example use case scenario are shown in which a wireless terminal can use vehicle information to perform manual VMR selection. Fig.21Specifically, the user interface 292 of the wireless terminal 116 (19) is shown to include a display such as a touch panel display on which vehicle identification information received from the mobile base station repeater 112 (19) is provided or represented in a user-discernible form (e.g., visually), as shown by the text "Display of VMR Vehicle Information" depicted in the display area 710 of the user interface 292. The display of VMR vehicle information may allow a user 712 of the wireless terminal to confirm / acknowledge the user's intention to use a VMR installed in a particular vehicle. In this use case, the wireless terminal 116 (19) may use its user interface 292 to present the vehicle information in text, graphics, or other audio / visual manner, and receive confirmation / acknowledgement from the user. Fig.21 The user 712 is shown selecting between options for a particular VMR shown in the “Confirm” or “Reject” area 710, whose vehicle identification information is shown in area 710. For example, the user 712 may select between a “Confirm” touch area 714 and a “Reject” touch area 716 on the touch screen of the user interface 292. Fig.21 As shown, the cell (re)selection controller 630 (19) may be connected to a display interface 718 that drives the display of vehicle identification information on area 710 and senses the touch or activation of the confirmation touch area 714 or the rejection touch area 716. The "confirmation" or "rejection" input by the user 712 is not limited to input via a touch screen, but may also be performed through other input devices, such as a keyboard or even voice recognition.

[0134] For example, as referenced Fig.21 The manual VMR selection described above is used in Fig.22A and Fig. 22B This may be useful in the scenario depicted in FIG. 7 , where there are two vehicles located nearby, namely, vehicle 730-1 and vehicle 730-2. Vehicle 730-1 and vehicle 730-2 are equipped with mobile base station repeaters 112(19)-1 and 112(19)-2, respectively. Fig.22A and Fig. 22B In both, the wireless terminal 116 (19) is located inside the vehicle 730-1 (19), for example, located in the vehicle or carried by the vehicle.

[0135] Fig.22A The wireless terminal 116 (19) resides on the mobile base station repeater 112 (19)-1, and the wireless terminal 116 (19) obtains the vehicle information 700-1 from the mobile base station repeater. Fig.22A In the scenario of FIG. 700 - 1 , the wireless terminal 116 ( 19 ) may display a human-readable representation of the vehicle information 700 - 1 , such as a bus number, and / or a destination of the vehicle 730 - 1 . Such display of a human-readable representation of the vehicle information 700 - 1 may be, for example, displayed on a Fig.21 700-1 is provided in the display area 710 of the wireless terminal 116 (19). The display of the human-recognizable representation of the vehicle information 700-1 can help the user of the wireless terminal 116 (19) manually recognize or confirm the mobile base station repeater 112 (19)-1. The user can recognize that the vehicle information 700-1 presented by the user interface 292 of the wireless terminal 116 (19) matches the user's identification of the vehicle in which the user is currently located (i.e., vehicle 730-1), and the user can take an affirmative action on the user interface, such as confirming or making an acknowledgment, such as confirming the displayed vehicle information, as described above, for example in conjunction with Fig.21 Therefore, Fig.22A An example scenario is shown in which a wireless terminal 116 (19) receives vehicle information 700-1 indicating a vehicle 730-1 in which a user is riding, thereby providing the user with an opportunity to confirm or affirm the vehicle information 700-1, thereby also affecting the cell selection or reselection process of the wireless terminal 116 (19), which is resident on a mobile base station repeater 112 (19)-1 carried by the vehicle 730-1 in which the user of the wireless terminal is riding.

[0136] Fig. 22B Another scenario is shown in which the wireless terminal 116 (19) resides on the mobile base station repeater 112 (19)-2, from which the wireless terminal 116 (19) obtains vehicle information 700-2. Fig. 22B In the scenario of , the wireless terminal 116 (19) may display a human-recognizable representation of the vehicle information 700-2, such as a bus number, and / or a destination of the vehicle 730-2. In this case, the user may recognize or realize that the vehicle information 700-2 presented by the user interface of the wireless terminal 116 (19) does not match the user's identification of the vehicle currently occupied or riding in the user (i.e., vehicle 730-1), and the user may take a negative action (e.g., a rejection or negative confirmation) on the user interface 292, such as by activating or selecting a button such as Fig.21 The rejection area 716 shown is used to reject the displayed vehicle information. Fig. 22B An example scenario is shown in which a wireless terminal 116 (19) receives vehicle information 700-2 indicating a vehicle 730-2 other than the vehicle 730-1 in which a user of the wireless terminal 116 (19) is riding, thereby providing the user with an opportunity to reject or negatively confirm the vehicle information 700-2, thereby also affecting the cell selection or reselection process of the wireless terminal 116 (19) residing on a mobile base station repeater 112 (19)-2 carried by the other vehicle 730-2.

[0137] Fig.21 , Fig.22A and Fig. 22BThe wireless terminal 116 (19) of the example embodiments and modes may change its behavior with respect to the cell selection / reselection process depending on user actions. For example, in Fig.22A In the depicted scenario, the user's action of confirming the vehicle information presented on the wireless terminal 116 (i.e., an affirmative action) may permit or cause the wireless terminal 116 (19) to treat the cell 114-1 served by the mobile base station repeater 112 (19)-1 as a mobile cell, as in Figures 11 to 14 Example implementations and modes and / or disclosed in Section 4.3 of this document. For example, in this case, wireless terminal 116 (19) may VMR Application to R s to ensure that the wireless terminal is likely to remain camped on cell 114-1.

[0138] On the other hand, Fig. 22B In the scenario depicted in FIG. 1 , preferably based on the user's negative action, the wireless terminal 116 (19) may adopt the same Fig.22A The cell 114-2 in which the wireless terminal 116 (19) resides may be handled differently from the scenario of the cell 114-1. In one implementation, the wireless terminal 116 (19) may treat the cell 114-2 as a non-mobile cell, for example, ignoring the Figure 3 and Figure 4 and / or the cellMobilityIndicator disclosed in Section 2.2 of this document, and / or ignoring the example implementations and modes of Figures 7 to 10 3.3 herein. Such processing may mean that the wireless terminal may treat cell 114-1 as a regular cell and may not perform special processing. In another specific implementation, the wireless terminal 116 (19) may apply one or more specified cell reselection parameters / criteria for cell 114-2. For example, the R s It can be derived from expression [1].

[0139] Expression [1]: R s =Q meas,s +Q hyst -Qoffset temp -Q unselected

[0140] In expression [1], Q unselected is an offset value intended to reduce the likelihood that wireless terminal 116(19) will stay on cell 114-2. unselected It may be pre-configured to the wireless terminal 116 (19), or configured to the wireless terminal via signaling such as system information from the mobile base station relay 112 (19)-2. 6.2 Vehicle Information for Automatic Cell Selection

[0141] As another use case or example implementation, vehicle information may be used for automatic cell selection / reselection of wireless terminals using predicted / scheduled mobility. Such wireless terminals may be equipped with learning / prediction algorithms such as machine learning and artificial intelligence with training data. For example, Fig.23 As shown, the processor 290 of the wireless terminal 116 (19) can execute instructions stored on a non-transitory processor-readable medium, including a learning / prediction algorithm 740. The learning / prediction algorithm generates an inference of whether the wireless terminal is likely to be associated with a vehicle based on vehicle information and learning data. As used herein, a wireless terminal "associated with a vehicle" includes the wireless terminal and the vehicle being in close proximity and / or having common mobility. For example, a wireless terminal that resides in a vehicle and moves with the vehicle can be considered to be associated with the vehicle. Therefore, a cell served by a mobile base station repeater carried in or on the vehicle is likely to be considered a cell for selection or reselection by the wireless terminal. The learning / prediction algorithm 740 can be executed by the cell (re)selection controller 630 (21) of the wireless terminal 116 (19). The training data that can be utilized can be, for example, a schedule for each day of the week, a commuting route, and / or public transportation usage. The learning algorithm 740 can generate inferences to help the wireless terminal 116 (19) determine whether to select / reselect a cell served by a mobile base station repeater. For example, in the case where the learning algorithm 740 infers that the cell being camped on is likely to match the user's predicted behavior, the wireless terminal 116(19) may treat this inference as a positive action as disclosed above. In another case where the learning algorithm 740 infers that the cell being camped on is unlikely to match the user's predicted behavior, the wireless terminal 116(19) may treat this inference as a negative action as disclosed above. 6.3 Vehicle Information Coding

[0142] Figures 18 to 26 The vehicle information of any of the exemplary embodiments of the present invention may be encoded in one or a combination of multiple methods. One of the multiple methods may utilize predefined values / codes. Table 4 shows example predefined values ​​for the elements of the vehicle information listed in Listing 5. In the case where the vehicle information is to be displayed in a user interface, the wireless terminal may convert these predefined values ​​into a human-readable format.

[0143] Table 5

[0144] Another method for encoding is that the vehicle information can be encoded in a human-readable text format, such as "Owner A, bus number 213, town a->town b". This human-readable text can be directly used for display. 6.4 Vehicle Information Message Types

[0145] In one example configuration, the vehicle information 700 of one or more embodiments described herein may be broadcast by a mobile base station repeater via its serving cell. Fig.22A or Fig. 22B In the scenario, vehicle information 700-1 and vehicle information 700-2 may be broadcasted by mobile base station relay 112(19)-1 and mobile base station relay 112(19)-2, respectively. The vehicle information may be included in a master information block MIB, a system information block 1 SIB1, one or more other SIBs, or a combination thereof.

[0146] In another alternative or additional configuration, the vehicle information 700 of one or more embodiments described herein may be transmitted to the wireless terminal by the mobile base station relay via dedicated signaling (e.g., RRC message or non-access layer NAS message). In this configuration, the vehicle information may be provided to the wireless terminal when in the radio resource control_Connected state (i.e., RRC_Connected state). 6.5 Vehicle Information: Multiple Sources

[0147] In yet another alternative or additional configuration, the vehicle information may be segmented, fragmented, or broken down into portions such that portions of the segmented portions of the vehicle information may be provided by one or more network entities. For example, some portions of the vehicle information may be provided by a first network entity, while the remaining portions may be provided by a second network entity. Fig.24 As shown in the example scenario of FIG. 1 , a first portion or set of vehicle information 700A may be stored in a vehicle information memory 702. The first portion or set of vehicle information 700A (such as a train number, which may be a small portion of the vehicle information) may be broadcast by a mobile base station repeater via system information. Fig.24 The vehicle information message generator 704 (24) is shown as a system information generator that includes a first portion 700A of the vehicle information in the system information. Fig.24 The first part or first set 700A of the system information block depicted in 706(24) is received. Fig.24 The wireless terminal 116 (19) may use the first portion 700A of the vehicle information to initiate a query, such as an on-demand request, to the second network entity. Fig.24 The cell (re)selection controller 630 (24) is shown as receiving / obtaining a first portion or set 700A of vehicle information from a first source (e.g., mobile base station repeater 112 (19)), and then generating a query requesting a second portion 700B or set of vehicle information. For example, Fig.24The cell (re)selection controller 630 (24) is shown as generating a query (e.g., query 744) to a second source of vehicle information (such as an application server 746) as depicted by arrow 744 to obtain a second portion or set 700B of vehicle information (e.g., the remaining portion, such as origin, destination, company, etc.). The bidirectional arrow 744 represents both the query for the second portion 700B and the response providing the second portion 700B to the wireless terminal 116 (19). For this case, the first portion 700A may also include an address of the application server 746, such as a URL. Alternatively or additionally, the first portion may include a tag / token / reference number representing the vehicle information, which may be used in the query.

[0148] although Fig.24 The wireless terminal 116 (19) is shown as obtaining segmented vehicle information from multiple sources (i.e., from the mobile base station repeater 112 (19)), but it should be understood that the wireless terminal 116 (19) may alternatively obtain the segmented vehicle information from a single source, i.e., obtaining a first segment from the mobile base station repeater 112 (19) via a first message and thereafter receiving a second segment of the vehicle information from the mobile base station repeater 112 (19) in another message upon request. 6.6 Vehicle Information: Wireless Terminal Operation

[0149] Fig.25 is a diagram showing a wireless terminal (eg Figures 19 to 26 Flowchart of example representative steps or actions performed by wireless terminal 116 (19)) of example embodiments and modes.

[0150] Action 25-1 includes receiving vehicle information from a service cell served by a mobile base station repeater, the vehicle information including information of a vehicle on which the mobile base station repeater is installed. The vehicle information may be included in system information transmitted by the mobile base station repeater. Alternatively or additionally, the vehicle information may be included in one or more messages dedicated to the wireless terminal. The vehicle information may include one or more information elements. Some of the one or more information elements may be encoded using predetermined values, while other of the one or more information elements may be encoded in human-readable text. A first portion of the first set of the one or more information elements may be provided by the mobile base station repeater, and a second portion of the second set of the one or more information elements may be provided by one or more network entities. The second set may be provided upon request from the wireless terminal to the one or more network entities based on the provision of the first set of the one or more information elements.

[0151] Action 25-2 includes performing a cell selection / reselection process based on the vehicle information. During the cell selection / reselection process, a determination may be made as to whether the wireless terminal is likely to be associated with the vehicle, and the cell selection / reselection process may be performed based on the determination. Specifically, in the case where the determination determines that the wireless terminal is likely to be associated with the vehicle, a first set of parameters may be applied to the cell selection / reselection process, and in the case where the determination determines that the wireless terminal is unlikely to be associated with the vehicle, a second set of parameters different from the first set of parameters may be applied to the cell selection / reselection process. In one specific implementation, the wireless terminal may be equipped with a user interface device for presenting vehicle information in a human-recognizable manner and receiving confirmation / negative confirmation of the presented vehicle information. In this specific implementation, if the user interface receives a confirmation, the determination may determine that the wireless terminal is likely to be associated with the vehicle. On the other hand, if the user interface receives a negative confirmation, the determination may determine that the wireless terminal is unlikely to be associated with the vehicle. In another specific implementation, the wireless terminal may have a learning / prediction algorithm that may generate an inference of whether the wireless terminal is likely to be associated with the vehicle based on the vehicle information and the learning data. 6.7 Vehicle Information: Node Operation

[0152] Fig.26 is a diagram showing the transmission of a signal by a mobile base station repeater (such as Figures 19 to 26 An example flow chart of example representative steps or actions performed by a mobile base station repeater 112 (19)) of an example implementation scheme and mode.

[0153] Action 26-1 includes generating vehicle information including information of the vehicle in which the mobile base station repeater is installed, wherein the vehicle information can be used by the wireless terminal to perform a cell selection / reselection process. The cell selection / reselection process can be performed by the wireless terminal based on a determination of whether the wireless terminal may be associated with a vehicle. The vehicle information can be included in system information transmitted by the mobile base station repeater. Alternatively or additionally, the vehicle information can be included in one or more messages dedicated to the wireless terminal. The vehicle information can include one or more information elements. Some of the one or more information elements can be encoded using predetermined values, while other of the one or more information elements can be encoded in human-readable text.

[0154] Action 26-2 includes transmitting the vehicle information to a wireless terminal via a serving cell served by the mobile base station repeater. 7.0 Soft cell identification on vehicle repeater changed

[0155] In a typical cellular communication system (such as the 5G NR system driven by 3GPP), at least one cell identity may be assigned to a cell. A first type of cell identity may be (1) uniquely assigned globally, or (2) uniquely assigned within specific boundaries such as a country and a network operator (e.g., PLMN). An example of a first type of cell identity is the NR cell global cell identifier NCGI.

[0156] The second type of cell identity is a cell identity with a limited code space that is used without defining boundaries. The second type of cell identity can be allocated in a way that ensures that nearby cells do not use the same cell identity. The physical cell ID PCI is an example of a second type of cell identity.

[0157] For example, the NR cell global cell identifier NCGI and physical cell ID PCI are described in 3rd Generation Partnership Project 3GPP TS 38.300 V16.8.0 (2021-12); Technical Specification Group Radio Access Network; NR; NR and NG-RAN overall description; Stage 2, (Release 16), which is incorporated herein by reference.

[0158] When deploying cells, network operators can assign PCIs to cells operating on the same frequency in a way that avoids potential conflicts. For example, PCIs can be assigned so that at a given location and at a given time, a wireless terminal (e.g., a user equipment UE) is unlikely to detect that two cells share the same PCI. The PCI of a cell can be encoded in a broadcast signal sent by a base station serving the cell, such as a primary synchronization signal PSS and / or a secondary synchronization signal SSS.

[0159] There may be problems with assigning a second type of cell identity to a mobile cell served by a vehicle mounted repeater (VMR) such as a mobile base station repeater disclosed in the previous embodiments. For example, problems may arise because an assignment made at a certain moment in time does not guarantee that conflicts will be avoided later. For example, a mobile cell served by a mobile base station installed on a moving bus may travel and may eventually approach a fixed cell or another mobile cell having the same PCI.

[0160] In order to avoid confusion of the PCI by the wireless terminal, the network should prevent two adjacent cells from sharing the same second type cell identifier. Figures 27 to 33 In the exemplary embodiments and modes of the present invention, when two or more mobile cells having the same second type cell identity are close to each other, at least one of the two or more mobile cells may have to change its second type cell identity. Figures 27 to 33 Detecting a possible conflict between two or more mobile cells and triggering a second type of cell identity change are discussed with reference to example embodiments and modes of the present invention. 7.1 Soft Cell Identity Change: Example Scenario

[0161] Fig. 27 An example communication system 100 (27) is shown in which two mobile cells (cell 114a and cell 114b) are served by mobile station relay 112a (27) and mobile station relay 112b (27), respectively. The two mobile station relays (mobile station relay 112a (27) and mobile station relay 112b (27)) are connected to carrier gNB 104a and carrier gNB 104b, respectively, via wireless backhaul link 110a and wireless backhaul link 110b, respectively. Fig. 27 In the example described herein, the same PCI is initially assigned to cell 114a and cell 114b. However, as the two mobile base station repeaters (mobile station repeater 112a (27) and mobile station repeater 112b (27)) move closer to each other, a decision may be made to change the PCI of one of the cells. In the example described herein, a decision is made to change the PCI of cell 114a.

[0162] There are several ways to change a cell identity, such as changing a second type cell identity. One such way is to shut down / deactivate a cell with a current or old cell identity and then start / activate a new cell with a different cell identity. This way may be referred to as a "hard cell identity change". Another way is to start / activate a new cell with a different cell identity before shutting down / deactivating a cell with an old cell identity, which may be referred to as a "soft cell identity change". Figures 27 to 33 Example embodiments and modes disclose methods and apparatus for soft cell identity change of a cell served by a mobile relay base station.

[0163] Fig.28 Shows Fig. 27 An example scenario of soft cell identity change of a communication system is depicted in FIG. At time T1, cell 114a and cell 114b, both of which are assigned PCI x, are located at a distance that is still sufficient to avoid PCI conflicts. As time passes, the two cells approach each other. At time T2, a PCI conflict is expected to occur. In response to the expected conflict, the network entity makes a decision to change the PCI of one of the two cells, e.g. Fig.28 This decision may result in that at time T3, Fig. 27 The mobile base station repeater 112a (27) starts / activates a new cell with a different PCI (i.e., PCI y), i.e. Fig.28 Thus, from time T3 onwards, mobile base station repeater 112a (27) serves both cell 114a and cell 114c. Then, at time T4, mobile base station repeater turns off / deactivates cell 114a.

[0164] The detection of possible PCI conflicts may be performed by a network entity, such as the Access and Mobility Management Function (AMF) of the core network, which manages the location of mobile base station relays under its control. Example network entities are shown as Fig. 27 The access and mobility management function (AMF) is merely one example node of the core network 102 (27) that may determine that two mobile relay base stations serving two respective cells having a common cell identity are or will be in a predetermined proximity and also initiate a soft change of the cell identity of one of the two respective cells. In addition to the access and mobility management function (AMF), further examples of other core network nodes that may act as nodes of the core network 102 (27) include the mobility management entity (MME) of the evolved packet core (EPC). Examples of other nodes or entities that may not be in the core network that may make the same or similar determination and initiate a soft change of cell identity include one of the carrier gNBs involved in a possible PCI conflict, such as Fig. 27 In this case, carrier gNB 104a and carrier gNB 104b may communicate via an inter-gNB protocol (such as the XnAP protocol in accordance with 3GPP TS 38.423) to exchange information of their serving cells, and one of these carrier gNBs may make a decision regarding the soft change of the cell identity. 7.2 Soft Cell Identity Changes: Network Architecture and Functions

[0165] Fig.29 Shows Fig. 27 Example embodiments and modes of communication system 100 (27) include example structures and functions of portions thereof. Fig.29 For example, a core network 102 (27) and a radio access network are shown. The radio access network includes a carrier gNB node 104a, such as Fig.28 The scenario involves a mobile base station repeater 112a (27), a mobile base station repeater, and a wireless terminal 116a (27). Fig. 27 The structure and function of the example embodiments and modes are substantially the same as those shown by corresponding reference numerals in the preceding figures, unless otherwise stated or apparent from the context.

[0166] exist Fig. 27 In the example embodiments and modes of Fig.29As shown in more detail, the core network 102 (27) includes one or more core network servers 746 (27), which may include one or more processors. The core network server 746 (27) includes a mobile relay base station manager 750. The mobile relay base station manager 750 in turn includes a mobile relay base station conflict avoidance detector 752 and a cell identification manager, such as a cell ID manager 754. The core network 102 (27) and / or the core network server 746 (27) communicate with other entities or networks via an interface 756. In addition, network entities (e.g., nodes of the core network 102 (27), and in particular the mobile relay base station conflict avoidance detector 752) may access information about mobile station relays, such as a database or memory including information about the location, direction of travel and speed, and / or route, scheduled mobility of the mobile base station relay 112a (27) and the mobile base station relay 112b (27). The network entity may collect information about the mobile station relays by each mobile station relay reporting its location, direction and speed of travel, and / or route to the network entity in a periodic manner. The network entity may consider such information in order to predict possible PCI conflicts in advance. Fig.29 As shown, the core network 102 ( 27 ) communicates with the radio access network via interface 756 .

[0167] The node of the core network 102 (27) is an example of a node (e.g., a network entity) of a communication network that can determine that two mobile relay base stations serving two respective cells having a common cell identity are or will be in a predetermined proximity and also initiate a soft change of the cell identity of one of the two respective cells. Fig.29 In an example embodiment and mode of the invention, the mobile relay base station conflict avoidance detector 752 may determine that two mobile relay base stations serving two respective cells having a common cell identity are or will be in a predetermined proximity. Fig.28 An example manner of making such a determination is described in the scenario of FIG. 75. After making such a possible conflict determination, the cell ID manager 754 may initiate a soft change of the cell identity of one of the two corresponding cells. Through the interface 756, the node may transmit one or more messages 758 including information that the mobile relay base station serving one of the two corresponding cells implements the soft change of the cell identity.

[0168] As in the previous embodiments and modes, the mobile base station relay mobile station relay 112a (27) includes a gNB controller 201; a relay controller 202; and a mobile terminal (MT) function 204. The gNB controller includes a transmit and receive point (TRP) 222, which in turn includes a transmitter 224 and a receiver 226.

[0169] exist Fig. 27 In the example embodiments and modes of Fig.29 As shown in more detail, the mobile station relay 112a (27) includes a cell ID controller 760, a soft cell ID change message generator 762, and a system information generator 704 (27). For example, the cell ID controller 760, the soft cell ID change message generator 762, and the system information generator 704 (27) may be implemented as part of or by the node processor 200 of the mobile station relay 112a (27), or may be implemented as described herein. Fig.50 A soft cell ID change notification 758 may be received by receiver circuit 208 from a network entity, such as a node of core network 102 (27). Soft cell ID change notification 758 may cause cell ID controller 760 to activate and deactivate cells, as described below, for example with reference to Fig.30 In addition, and as described herein, the soft cell ID change message generator 762 may generate one or more messages to the wireless terminal 116a (27) in conjunction with a determination by the core network 102 (27) (e.g., the mobile relay base station manager 750 of the core network 102 (27)) that the cell ID of the mobile relay base station should be changed to avoid a cell ID conflict.

[0170] Fig.29 The wireless terminal 116a (27) is shown as including a transceiver circuit 276. The transceiver circuit 276 may in turn include a transmitter circuit 277 and a receiver circuit 278. The transceiver circuit 276 may include an antenna 279 for wireless transmission. The transmitter circuit 277 may include, for example, amplifiers, modulation circuits, and other conventional transmission equipment. The receiver circuit 278 may include, for example, amplifiers, demodulation circuits, and other conventional receiver equipment.

[0171] Fig.29 The wireless terminal 116(27) is also shown to include wireless terminal processor circuitry, such as one or more wireless terminal processors 290. The wireless terminal 116(27) (e.g., wireless terminal processor 290) may include a frame / message generator / handler 294 and a cell (re)selection controller 630(27). The cell (re)selection controller 630(27) includes a soft cell ID change cell selector 770 that the wireless terminal 116a(27) utilizes to perform cell (re)selection based on a soft cell ID change.

[0172] The wireless terminal 116 (27) may also include an interface 292, including one or more user interfaces. Such user interfaces may be used for user input and output operations, and may include, for example, a screen such as a touch screen that may display information to a user and receive information input by the user. For example, the user interface 292 may also include other types of devices, such as a speaker, a microphone, or a tactile feedback device.

[0173] exist Figures 27 to 33 In an embodiment and mode of the present invention, the receiver circuit 278 is configured to receive one or more messages 772 from the mobile station relay 112a (27) that provide information 772 suitable for performing soft cell ID change reselection to the wireless terminal 116a (27) as described herein. The node processor 290 (e.g., the soft cell ID change cell selector 770) is configured to perform a cell reselection process based on the soft cell ID change instructions / information provided in the message 772. 7.3 Soft cell identity change: message sent to repeater

[0174] exist Fig.28 In an example scenario, a network entity such as a node of the core network 102 (27) may determine at time T2 to change the PCI of the cell 114a from PCIx to PCIy based on the reduced distance between the mobile station relay 112a (27) and the mobile base station 112b (27). The network entity may transmit one or more messages 758 to the mobile base station 112a (27) via the carrier gNB 110a, the message including instructions for starting / activating the cell 114c with PCIy.

[0175] In one configuration, the instructions may also configure when to activate cell 114c and / or when to deactivate / deactivate cell 114a. In other words, the instructions may configure the deactivation timer to specify a timing of T4.

[0176] In another configuration, the network entity may transmit another message with instructions to shut down / deactivate cell 114a after time T3 and before time T4. 7.4 Soft cell identity change: message sent to the terminal

[0177] When a soft cell identity change occurs on a mobile cell (i.e., an old cell) served by a mobile base station relay, a wireless terminal 116a (27) that is idle (e.g., RRC_IDLE) or inactive (e.g., RRC_INACTIVE) on the mobile cell may need to reselect another cell, preferably a new cell to be started / activated by the same mobile base station relay. Such cell reselection may be performed by a soft cell ID change cell selector 770 and should occur after the new cell is started / activated and before the old cell is shut down / deactivated. In order for such cell reselection to occur, it may be necessary for the old cell to notify the wireless terminal 116a (27) that a soft cell identity change is about to occur. In addition, the wireless terminal 116a (27) may also need to receive additional information about the new cell that the wireless terminal 116a (27) is expected to reselect. In this regard, and in example embodiments and modes, a notification message broadcast from the old cell may be used to trigger the wireless terminal to acquire system information also broadcast from the old cell. Fig.29 One or more messages including the aforementioned notification message and system information transmitted from the mobile station relay 112a (27) to the wireless terminal 116a (27) in conjunction with the soft cell ID change are depicted as arrow 772. The system information may include an indication of the soft cell identification change, and / or information that the new cell is a neighbor cell.

[0178] In a first example implementation, the notification message may be a short message in accordance with 3GPP TS 38.331 as shown in Table 6-1. The short message of Table 6-1 is a short message of 3GPP TS 38.331 V16.7.0 (2021-12); 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Radio Resource Control (RRC) Protocol Specification (Release 16), which is incorporated herein by reference. In the short message of Table 6-1, the first bit may be set to 1 to indicate that some of the system information blocks (SIBs) other than SIB6, SIB7, and SIB8 are updated, which triggers the wireless terminal to acquire the SIBs after the next modification boundary. When receiving the short message with the first bit set to 1, the wireless terminal may acquire SIB1 and may further acquire other SIBs.

[0179] Table 6-1

[0180] In a first example implementation, a first system information block SIB may include an indication of a soft cell identity change, and a second SIB may include information about the new cell. For example, SIB1 of Listing 6 includes a "pciChange" information element that indicates whether the old cell (the cell transmitting the SIB1) is in the process of changing the soft cell identity. If it is in the process, SIB3 of Listing 7 may indicate which of the neighboring cells listed in SIB3 is the new cell, i.e., the cell that eventually replaces the old cell, through an optional field "newCellForPCIChange". As shown in Listing 7, the newCellForPCIChange information element may be associated with a physCellId information element that provides the PCI of the new cell.

[0181]

[0182] In a second example implementation, the short message may include an additional information bit indicating whether the old cell (i.e., the cell transmitting the short message) is in the process of changing the soft cell identity, as shown in the 4th bit of Table 6-2. This additional information may be logically equivalent to the pciChange of the first implementation. However, the 4th bit of Table 6-2 being set to 1 may further indicate that the recipient of the short message may be required to immediately acquire the SIB (at least SIB1 and preferably other SIBs) without waiting for the boundary of the next modification period boundary. In this document, the modification period is a period configured by SIB1, during which the contents of SIB1 and other SIBs are guaranteed not to change. In the second implementation, the pciChange information element in SIB1 may not be required, but information of the new cell may be used, such as newCellForPCIChange in Listing 7.

[0183] Table 6-2 7.5 Soft Cell Identity Change: Node Operation

[0184] Fig.30 Shown for Fig. 27 communication systems and Fig.28 Example message flow and associated events for a scenario.

[0185] Action 30-0 includes the wireless terminal 116a (27) being in the RRC_IDLE or RRC_INACTIVE state.

[0186] Action 30-1 includes: wireless terminal 116a (27) at Fig.28The mobile station resides at cell 114a (PCI x) served by mobile station repeater 112a (27) for time T1.

[0187] Action 30-2 depicts the Fig.28 At time T2, the network entity decides to activate cell 114c with PCI y and transmits a cell activation message to mobile base station relay 112a (27). In other words, action 30-2 includes: the network entity (e.g., mobile relay base station conflict avoidance detector 752) determines that two mobile relay base stations serving two respective cells with a common cell identity are or will be in a predetermined proximity, and sends a cell activation message that will initiate a soft change of the cell identity of one of the two respective cells.

[0188] Action 30-3 includes: Fig.28 At time T3, the mobile station repeater activates cell 114c with PCI y, and cell 114c begins transmitting broadcast signals, such as system information. Cell ID controller 760 of mobile station repeater 112a (27) may activate cell 114c, and soft cell ID change message generator 762 may generate information to be included by system information generator 704 (27) in system information that may be broadcast by transmitter circuit 224.

[0189] Action 30 - 4 , which is performed in parallel with or after action 30 - 3 , includes the cell 114 a broadcasting a short message, such as one of Table 6-1 or Table 6-2 . The short message is transmitted by the transmitter circuit 224 .

[0190] Action 30-5 includes receiving the short message triggering a system information acquisition process at the wireless terminal 116a (27) to acquire the latest system information from the cell 114a. The short message is received by the receiver circuit 278 and processed by the frame / message handler / generator 294. The wireless terminal processor 290 performs the system information acquisition process.

[0191] Action 30 - 6 includes the wireless terminal 116 a ( 27 ) acquiring system information including SIB1 and other related SIBs (eg, SIB3 of List 7 ).

[0192] Action 30-7 includes the wireless terminal 116a (27) performing a cell reselection procedure. Based on the received system information, the wireless terminal 116a (27) identifies the cell 114c as a cell to reselect. The cell reselection procedure may be performed by the cell (re)selection controller 630 (27).

[0193] Action 30-8 includes wireless terminal 116a (27) acquiring system information from cell 114c and camping on cell 114c.

[0194] Action 30-9 includes the network entity deciding to deactivate cell 114a and sending a cell deactivation message (27) to mobile base station relay 112a.

[0195] exist Fig.28 Action 30 - 10 performed at time T4 includes: the mobile base station relay 112 a ( 27 ) deactivating the cell 114 a . The deactivation may be managed by the cell ID controller 760 .

[0196] Fig.31 1 is a flow chart showing example representative actions or steps performed by a network entity according to example embodiments and modes. As previously mentioned, the network entity may be an access and mobility management function (AMF) or another core network node implementing functionality, or even a non-core network node. The network entity may include a processor and a memory, the processor working together with the memory to execute Fig.31 and other actions described herein.

[0197] Action 31-1 comprises: the entity makes a determination that two mobile relay base stations serving two respective cells having a common cell identity are or will be in a predetermined proximity. Action 31-2 comprises: the entity initiates a soft change of a cell identity of one of the two respective cells. Action 31-3 comprises transmitting a message comprising information that a mobile relay base station serving one of the two respective cells implements a soft change of a cell identity.

[0198] Fig.32 is a diagram showing a wireless terminal (such as Fig. 27 and Fig.28 Flowchart of example representative steps or actions performed by a wireless terminal 116a (27)). The wireless terminal may include a processor and a memory, the processor working together with the memory to execute Fig.32 and other actions described herein.

[0199] Action 32-1 includes: receiving an indication indicating that the first cell is to be deactivated, an instruction for reselecting a second cell, and a cell identifier of the second cell from a first cell served by a mobile relay base station. The cell identifier of the second cell may be different from the cell identifier of the first cell. The second cell may be served by a mobile base station relay. In addition, the second cell may be activated upon or before receiving the indication, and replace the first cell after the first cell is deactivated. In one specific implementation, the indication is included in a first system information block (SIB). In this specific implementation, the wireless terminal may receive a first notification message that triggers the acquisition of a first SIB, and the first SIB further triggers the acquisition of a second SIB, wherein the second SIB may include the instruction and the cell identifier of the second cell. In another specific implementation, the indication may be included in a second notification message that triggers the acquisition of a second SIB, wherein the second SIB may include the instruction and the cell identifier of the second cell.

[0200] Action 32-2 includes performing a cell selection / reselection procedure to reselect a second cell based on the indication and the instruction.

[0201] Fig.33 is a diagram showing a mobile base station repeater (such as Fig. 27 and Fig.28 A flowchart of example representative steps or actions performed by a mobile base station repeater 112a (27) of the present invention. The mobile station repeater may include a processor and a memory, the processor and the memory working together to perform Fig.33 and other actions as described herein.

[0202] Action 33-1 includes generating an indication indicating that the first cell is to be deactivated, an instruction for reselecting the second cell, and a cell identifier of the second cell. The cell identifier of the second cell may be different from the cell identifier of the first cell. The second cell may be served by a mobile base station repeater. In addition, the second cell may be activated upon or before receiving the indication and replace the first cell after the first cell is deactivated. In one specific implementation, the indication is included in a first system information block (SIB). In this specific implementation, the mobile base station repeater may transmit a first notification message that triggers the wireless terminal to acquire the first SIB, and the first SIB further triggers the acquisition of the second SIB, wherein the second SIB may include the instruction and the cell identifier of the second cell. In another specific implementation, the indication may be included in a second notification message that triggers the wireless terminal to acquire the second SIB, wherein the second SIB may include the instruction and the cell identifier of the second cell.

[0203] Action 33-3 includes transmitting the indication, the instruction, and the cell identity of the second cell to the wireless terminal. The wireless terminal may use the indication and the instruction to reselect the second cell. 8.0 Enhanced cell reselection procedure for soft cell identity change on vehicle-mounted repeaters

[0204] In a conventional cell reselection process, such as that specified in 3GPP TS 38.304, a wireless terminal may determine (1) whether to trigger measurements for discovering intra-frequency neighbor cells, and when such measurements are triggered, (2) whether to reselect the discovered cell. An intra-frequency neighbor cell is a neighbor cell operating on the frequency of the current serving cell.

[0205] TS 38.304 specifies the triggering conditions for measurements to discover intra-frequency neighbor cells as shown in Listing 8. TS 38.304 states that intra-frequency measurements will not be triggered if the serving cell is stronger than the threshold configured by the serving cell.

[0206] List 8 - If the serving cell satisfies Srxlev>S IntraSearchP And Squal>S IntraSearchQ , the UE may choose not to perform intra-frequency measurements. - Otherwise, the UE shall perform intra-frequency measurements. - The UE shall apply the following rules for the NR inter-frequencies and inter-RAT frequencies with priority indicated in the system information, as defined in 5.2.4.1: - For an inter-NR frequency or inter-RAT frequency with a higher reselection priority than the current NR frequency, the UE shall perform measurements of the higher priority inter-NR frequency or inter-RAT frequency according to TS 38.133 [8]. - For inter-NR frequencies with a reselection priority equal to or lower than the reselection priority of the current NR frequency, and for inter-RAT frequencies with a reselection priority lower than the reselection priority of the current NR frequency: - If the serving cell satisfies Srxlev>S nonIntraSearchP And Squal>S nonIntraSearchQ , the UE may choose not to perform measurements on NR inter-frequency or inter-RAT frequency cells of equal or lower priority; Otherwise, the UE shall perform measurements on NR inter-frequency or inter-RAT frequency cells of equal or lower priority according to TS 38.133 [8]. - If the UE supports relaxed measurements and relaxedMeasurement is present in SIB2, the UE may further relax the required measurements as specified in clause 5.2.4.9.

[0207] Likewise, TS 38.304 also specifies criteria for reselecting a discovered new cell to determine whether to reselect a discovered cell. For example, see List 3 in Section 4.3 of this document, where the wireless terminal only reselects a discovered cell during a time interval T. reselectionRAT During this period, a new intra-frequency cell is reselected only if the new cell is better than the serving cell according to the cell reselection criteria. This means that even if intra-frequency measurements are triggered and neighboring cells are discovered, cell reselection will not occur if the serving cell is strong enough compared to the neighboring cell.

[0208] exist Fig. 27 and Fig.28 In the illustrated scenario, cell 114a, which is an old cell, remains in service until it is deactivated. During the period from time T3 to time T4, intra-frequency measurements may not be triggered because cell 114a is still active and may be accessible to wireless terminals (including Fig. 27 and Fig.28 The wireless terminal 116a) is strong enough. Fig.30 The intra-frequency measurements during the cell reselection process shown in action 30-7 may not occur during the period T3-T4. Instead, the intra-frequency measurements may occur after the cell 114a is turned off at time T4. This may cause Fig.30 The purpose of the notification shown in action 30-4 fails. The purpose of the notification (short message) in action 30-4 is to trigger the system information acquisition process at the wireless terminal so as to acquire the latest system information from the cell 114a.

[0209] The embodiments of Section 8.0 of this document disclose a method for a wireless terminal (such as a Fig. 27 The enhanced cell reselection process of the wireless terminal 116a (27)) is performed by the serving cell, wherein the soft cell identity change is performed as disclosed in the implementation scheme of Section 7.0 of this document.

[0210] In the implementation of Section 7.0, the wireless terminal may receive a notification of a soft cell identity change, such as receiving SIB1 with the pciChange field populated in List 6, receiving a short message with bit 4 of Table 6-2 set to 1, and / or receiving SIB3 with newCellForPCIChange in IntraFreqNeighCellInfo. However, in the case of receiving a notification of a soft cell identity change, the wireless terminal of the implementation and mode of Section 8.0 is enhanced because the wireless terminal may change the cell reselection process. Specifically, for example, in the case of receiving a notification of a soft cell identity change, the wireless terminal may attempt to obtain information about a new cell (e.g., cell 114c, a neighboring cell associated with newCellForPCIChange) that will replace the old cell (e.g., cell 114a), and may obtain a cell identity (e.g., PCI) of the new cell. Such acquired or obtained information may, for example, come from system information as disclosed in Section 7.0, such as SIB1 and SIB3 of List 6 and List 7, respectively. The wireless terminal may then initiate intra-frequency measurements regardless of the strength of the current serving cell. During the measurement, if the wireless terminal finds a new cell (a cell designated as a cell to replace the old cell), the wireless terminal may reselect the new cell regardless of the cell reselection criteria of List 3. Conversely, if the wireless terminal finds another neighboring cell that does not replace the old cell (such as a cell not associated with newCellForPCIChange), the cell reselection criteria of List 3 may be applied.

[0211] Implementations of Section 8.0 therefore include a wireless terminal performing a cell reselection process that depends on whether a newly discovered neighboring cell is a replacement cell, such as whether to perform intra-frequency measurements and reselection of a new cell based on whether a soft cell identity change has been notified. As used herein, "replacement" of a serving cell means that the cell being reselected is a cell that has undergone a soft cell identity change, rather than another neighboring cell. Therefore, the cell reselection process of the wireless terminal of Section 8.0 may depend on neighboring cell replacement information received by the wireless terminal. Reference Figure 34 to Figure 37 To illustrate the implementation of Section 8.0. 8.1 General Architecture and Operations

[0212] Fig.34 Example structure and functionality of portions of an example embodiment and mode communication system 100 (34) are shown. Fig.34 For example, a core network 102 (34) and a radio access network are shown. The radio access network includes a carrier gNB node 104a, a mobile base station relay such as a mobile base station relay 112a (34), and a wireless terminal 116a (34). The wireless terminal 116a (34) is capable of communicating with Fig. 27The wireless terminal 116a (27) is located in the network in a similar manner and may also be referred to as the wireless terminal 116 (34). Fig.34 The structure, function, and operation of the example embodiments and modes are substantially the same as those shown by corresponding reference numerals in the preceding figures, unless otherwise specified or apparent from the context.

[0213] exist Fig.34 In an example embodiment and mode, the core network 102 (34) includes one or more core network servers 746 (34), which may include one or more processors. The core network server 746 (34) includes a mobile relay base station manager 750. The core network 102 (34) and / or the core network server 746 (34) communicate with other entities or networks via an interface 756. Fig.34 As shown, the core network 102 ( 34 ) communicates with the radio access network via interface 756 .

[0214] The node of the core network 102 (34) is an example of a node of a communication network (e.g., a network entity) that can determine that two mobile relay base stations serving two corresponding cells having a common cell identity are or will be in a predetermined proximity and also initiate a soft change of the cell identity of one of the two corresponding cells.

[0215] As in the previous embodiments and modes, the mobile base station relay mobile station relay 112 (34) includes a gNB controller 201; a relay controller 202; and a mobile terminal (MT) function 204. The gNB controller includes a transmit and receive point (TRP) 222, which in turn includes a transmitter 224 and a receiver 226.

[0216] exist Fig.34 In an example embodiment and mode of the present invention, the mobile station relay 112 (34) includes a system information generator 704 (34) and a memory or generator for neighboring cell information 800. The neighboring cell information 800 includes a cell identifier of a neighboring cell and an indication associated with the cell identifier of the neighboring cell. The indication associated with the cell identifier of the neighboring cell indicates whether the serving cell is to be replaced by the neighboring cell. The system information generator 704 (34) may include the neighboring cell information 800 in the system information.

[0217] Fig.34The wireless terminal 116a (34) is shown as including a transceiver circuit 276. The transceiver circuit 276 may in turn include a transmitter circuit 277 and a receiver circuit 278. The transceiver circuit 276 may include an antenna 279 for wireless transmission. The transmitter circuit 277 may include, for example, amplifiers, modulation circuits, and other conventional transmission equipment. The receiver circuit 278 may include, for example, amplifiers, demodulation circuits, and other conventional receiver equipment.

[0218] Fig.34 Also shown is a wireless terminal 116a (34), which is shown to also include wireless terminal processor circuitry, such as one or more wireless terminal processors 290. The wireless terminal 116a (34) (e.g., wireless terminal processor 290 (34)) may include a frame / message generator / handler 294 and a cell (re)selection controller 630 (34). The (re)selection controller 630 (34) may also be referred to as a neighbor cell replacement information dependent cell reselection controller 290 (34) because, as described above, the wireless terminal 116a (34) performs a cell reselection process that depends on whether the newly discovered neighbor cell is a replacement cell.

[0219] The wireless terminal 116a (34) may also include an interface 292, including one or more user interfaces. Such a user interface may be used for both user input and output operations. For example, the user interface may include a screen, such as a touch screen, that may display information to a user and receive information input by the user. For example, the user interface 292 may also include other types of devices, such as a speaker, a microphone, or a tactile feedback device.

[0220] exist Figure 34 to Figure 37 In an embodiment and mode of the present invention, the receiver circuit 278 is configured to receive one or more messages 802 from the mobile station repeater 112 (34), as described herein, which provide the wireless terminal 116 (34) with neighboring cell information 800. As described above, the neighboring cell information 800 includes a cell identity of the neighboring cell and an indication associated with the cell identity of the neighboring cell. The indication associated with the cell identity of the neighboring cell indicates whether the serving cell is to be replaced by the neighboring cell, for example, whether a soft cell identity change is notified.

[0221] Fig.35 It is used for Figure 34 to Figure 37 An example flow chart of a cell reselection process for a wireless terminal of the example implementation and mode of Section 8.0 is shown. As described above, the cell reselection process of Section 8.0 depends on whether the serving cell is to be replaced by a replacement cell and whether the newly discovered neighboring cell is a replacement cell. Fig.35 Example actions or steps are shown for the cell (re)selection procedure for wireless terminal 116A (34) of Section 8.0.

[0222] Action 35-0 includes the wireless terminal being in the RRC_IDLE or RRC_INACIVE state. Action 35-1: includes the wireless terminal determining whether there is a newCellForPCIChange associated with at least one entry of IntraFreqNeighCellInfo in the received SIB3, that is, whether the cell in the neighbor cell list is indicated as having undergone a soft identification change. It should be understood that the indication of the neighbor cell list and the soft identification change can be indicated in other ways, such as by information elements of other names or in other ways. If the determination of action 35-1 is affirmative, the cell reselection process continues to action 35-2. Otherwise, the cell reselection process continues to action 35-6. The reception of SIB3 may have been triggered by the method disclosed in Section 7, such as, for example, by receiving a short message.

[0223] Action 35-2 comprises the wireless terminal performing an intra-frequency measurement. Then, as action 35-3, the wireless terminal checks whether a new cell has been found due to the intra-frequency measurement. If the check of action 35-3 is positive, the wireless terminal proceeds to action 35-4. Otherwise, if the check of action 35-3 is negative, the wireless terminal again performs action 35-2, for example, performing an intra-frequency measurement.

[0224] Action 35-4 includes the wireless terminal further checking whether the new cell is a cell indicated by at least one entry of IntraFreqNeighCellInfo associated with newCellForPCIChange. If the check of action 35-4 is positive, the wireless terminal proceeds to action 35-5. Action 35-5 includes the wireless terminal reselecting the new cell. Otherwise, if the check of action 35-4 is negative, the wireless terminal proceeds to action 35-7.

[0225] When there is no newCellForPCIChange associated with at least one entry of IntraFreqNeighCellInfo in the received SIB3, action 35-6 is performed. Action 35-6 includes the wireless terminal checking whether the condition for triggering the intra-frequency measurement is met. If the check of action 35-6 is positive, the wireless terminal performs action 35-2 to perform the intra-frequency measurement triggered as determined at action 35-6. Otherwise, if the check of action 35-6 is negative, the wireless terminal loops back to perform action 35-1.

[0226] When the wireless terminal has determined at action 35-4 that the new cell is not a cell associated with newCellForPCIChange (e.g., the new cell is not a replacement cell caused by a soft identity change), action 35-7 is performed. Action 35-7 includes the wireless terminal checking whether a cell reselection condition is met for the new cell. If the check of action 35-7 is positive, e.g., if the cell reselection condition is met, the wireless terminal continues to perform action 35-5, e.g., to reselect the new cell. Otherwise, if the check of action 35-7 is negative, the wireless terminal continues the intra-frequency measurement depicted by action 35-2.

[0227] Fig.35 Action 35-4, action 35-5, and action 35-7 of show that if the new cell is a cell associated with newCellForPCIChange, for example, if the new cell is replacing the serving cell due to a soft PCI change, the new cell may be reselected unconditionally. As an alternative to reselecting the new cell unconditionally, another set of cell reselection conditions may be applied even if the new cell is associated with newCellForPCIChange, i.e., even if the new cell is replacing the serving cell. Another set of cell reselection conditions that may be different from the cell reselection conditions used in action 35-7 may be configured by the serving cell via system information to ensure that the cell replacing the serving cell has a minimum level of strength and / or quality.

[0228] Therefore, as an example in Figure 35 to Figure 37 The example implementation scheme and mode shown in Section 8.0 include a wireless terminal of a cellular telecommunications system, which communicates with a serving cell served by a mobile base station repeater. In the example implementation scheme and mode, the wireless terminal includes a receiver circuit and a processor circuit. The receiver circuit is configured to receive neighboring cell information from the serving cell, the neighboring cell information including a cell identifier of the neighboring cell and an indication associated with the cell identifier of the neighboring cell. The indication associated with the cell identifier of the neighboring cell indicates whether the serving cell will be replaced by the neighboring cell. The processor circuit is configured to perform a cell reselection process based on the neighboring cell information. During the cell reselection process, (1) one or more measurements are performed based on the indication to find a neighboring cell; and (2) a decision is made based on the indication whether to reselect the neighboring cell.

[0229] As an example in Figure 35 to Figure 37The example implementation scheme and mode shown in Section 8.0 also include a mobile base station repeater of a cellular telecommunications system. The mobile base station repeater serves a wireless terminal via a serving cell. The mobile base station repeater includes a processor circuit and a transmitter circuit. The processor circuit is configured to generate neighboring cell information, which includes a cell identifier of a neighboring cell and an indication associated with the cell identifier of the neighboring cell. The indication associated with the cell identifier of the neighboring cell indicates whether the serving cell will be replaced by the neighboring cell. The wireless terminal uses the neighboring cell information to perform a cell reselection process. The transmitter circuit is configured to transmit the neighboring cell information to the wireless terminal. The indication associated with the cell identifier of the neighboring cell is configured to be used by the wireless terminal during the cell reselection process to: (1) determine whether to perform one or more measurements to find a neighboring cell; and (2) make a decision whether to reselect a neighboring cell.

[0230] Fig.36 It is shown by Fig.34 A flowchart of general, basic, example, representative steps or actions performed by the wireless terminal 116 (34).

[0231] Action 36-1 includes receiving neighboring cell information from a serving cell. The neighboring cell information includes a cell identity of the neighboring cell and an indication associated with the cell identity of the neighboring cell. The indication associated with the cell identity of the neighboring cell indicates whether the serving cell will be replaced by the neighboring cell. In some example implementations, the neighboring information is included in a system information block (SIB). Typically, the serving cell will be replaced by the neighboring cell to avoid a conflict between the cell identity of the serving cell and another cell assigned the same cell identity. The neighboring cell may operate at a frequency at which the serving cell operates.

[0232] Action 36-2 includes the wireless terminal performing a cell reselection procedure based on the neighbor cell information. During the cell reselection procedure, (1) one or more measurements are performed based on the indication to find a neighbor cell, and (2) a decision to reselect a neighbor cell is performed based on the indication.

[0233] In case the indication indicates that the serving cell is to be replaced by a neighboring cell, the one or more measurements are performed. In addition, when a neighboring cell is found during the one or more measurements, the neighboring cell that has been indicated as replacing the serving cell is reselected.

[0234] On the other hand, in the case where the indication does not indicate that the serving cell will be replaced by a neighboring cell, the one or more measurements are performed based on the measurement conditions configured by the serving cell. For example, as discussed above with respect to action 35-6, the measurement of action 35-2 may be performed or not performed based on whether the measurement is triggered by a measurement triggering condition. The measurement triggering condition may include a threshold. In the case where the signal strength / quality of the serving cell is greater than the threshold, the one or more measurements of action 35-2 may not be performed. Otherwise, the one or more measurements may be triggered, and in the case where the one or more measurements of action 35-2 result in the finding of a neighboring cell, the neighboring cell may be reselected based on the reselection conditions configured by the serving cell, as reflected in action 35-7. That is, according to the cell reselection conditions, in the case where the neighboring cell is not better than the serving cell, the neighboring cell may not be reselected.

[0235] Fig.37 is shown by a mobile base station repeater (e.g., Fig.34 A flowchart of basic, example, representative steps or actions performed by a mobile base station repeater 112 (34)).

[0236] Action 37-1 includes generating or obtaining neighboring cell information. The neighboring cell information includes a cell identifier of the neighboring cell and an indication associated with the cell identifier of the neighboring cell. The indication associated with the cell identifier of the neighboring cell indicates whether the serving cell served by the mobile base station relay will be replaced by the neighboring cell. In some specific implementations, the neighboring information is included in a system information block (SIB). Typically, the serving cell will be replaced by the neighboring cell to avoid a conflict between the cell identifier of the serving cell and another cell assigned the same cell identifier. The neighboring cell may operate at a frequency at which the serving cell operates. The neighboring cell information may be configured to be used by the wireless terminal to perform a cell reselection process, wherein (1) one or more measurements may be performed based on the indication to find a neighboring cell, and (2) a decision to reselect a neighboring cell may be performed based on the indication. In the case where the indication indicates that the serving cell will be replaced by the neighboring cell, the one or more measurements are performed, and when a neighboring cell is found during the one or more measurements, the neighboring cell is reselected. On the other hand, in the case where the indication does not indicate that the serving cell will be replaced by the neighboring cell, the one or more measurements are performed based on a measurement condition configured by the serving cell. The measurement condition may include a threshold. If the signal strength / quality of the serving cell is greater than the threshold, the one or more measurements may not be performed. Otherwise, the one or more measurements may be triggered, and if the one or more measurements enable the neighboring cell to be found, the neighboring cell may be reselected based on the reselection condition configured by the serving cell. That is, according to the cell reselection condition, if the neighboring cell is not better than the serving cell, the neighboring cell may not be reselected.

[0237] Action 37-2 includes transmitting neighbor cell information to the wireless terminal.

[0238] As an example in Figure 34 to Figure 37 The techniques of the example implementations and modes of Section 8.0 of this document shown in also cover non-transitory computer-readable media encoded with a computer program that, when executed by a computer or processor of a wireless terminal described herein, causes the computer to implement the actions described herein (e.g., Fig.35 and Fig.36 ), and / or a non-transitory computer readable medium encoded with a computer program, which, when executed by a computer or processor of the mobile base station repeater described herein, causes the computer to implement Fig.37 action. 8.2 Example Measurement Rules and Cell Selection Criteria

[0239] Listing 9 and Listing 10 respectively show the examples of Figure 34 to Figure 37 The example procedures for measurement rules and cell reselection criteria of the example implementation and mode of Section 8.0 are shown in . In Listing 9 and Listing 10, SIB3 may refer to SIB3 of Listing 7.

[0240] List 9 - If newCellForPCIChange is included in the received IntraFreqNeighCellInfo of SIB3, the UE shall perform intra-frequency measurements. - Or, if the serving cell satisfies Srxlev>S IntraSearchP And Squal>S IntraSearchQ , the UE may choose not to perform intra-frequency measurements. - Otherwise, the UE shall perform intra-frequency measurements. - The UE shall apply the following rules for the NR inter-frequencies and inter-RAT frequencies with priority indicated in the system information, as defined in 5.2.4.1: - For an inter-NR frequency or inter-RAT frequency with a higher reselection priority than the current NR frequency, the UE shall perform measurements of the higher priority inter-NR frequency or inter-RAT frequency according to TS 38.133 [8]. - For inter-NR frequencies with a reselection priority equal to or lower than the reselection priority of the current NR frequency, and for inter-RAT frequencies with a reselection priority lower than the reselection priority of the current NR frequency: - If the serving cell satisfies Srxlev>S nonintraSearchP And Squal>S nonintraSearchQ , the UE may choose not to perform measurements on NR inter-frequency or inter-RAT frequency cells of equal or lower priority; Otherwise, the UE shall perform measurements on NR inter-frequency or inter-RAT frequency cells of equal or lower priority according to TS 38.133 [8]. - If the UE supports relaxed measurements and relaxedMeasurement is present in SIB2, the UE may further relax the required measurements as specified in clause 5.2.4.9. List 10 The cell ranking criterion R for serving cells s and R for neighboring cells n Defined by: R s =Q meas,s +Qhyst-Qoffset temp R n =Q meas,n -Qoffset-Qoffset temp in, The UE shall perform a ranking of all cells that satisfy the cell selection criterion S as defined in Section 5.2.3.2. By exporting Q meas,n and Q meas,s The average RSRP result is used to calculate the R value and rank the cells according to the R criteria specified above. If rangeToBestCell is not configured, the UE shall perform cell reselection to the highest ranked cell. If this cell is found not suitable, the UE shall act according to clause 5.2.4.4. If rangeToBestCell is configured, the UE shall perform cell reselection to the cell with the highest number of beams above the threshold (i.e., absThreshSS-BlocksConsolidation) among the cells with R values ​​within the ToBestCell range of the highest ranked cell's R value. If there are multiple such cells, the UE shall perform cell reselection to the highest ranked cell among them. If the cell is found to be unsuitable, the UE shall operate in accordance with clause 5.2.4.4. If the new cell is associated with newCellForPCIChange included in the received IntraFreqNeighCellInfo of SIB3, the UE may reselect the new cell. Otherwise, the UE will reselect a new cell only if the following conditions are met: -Treselection in time interval RATDuring this period, the new cell is better than the serving cell according to the cell reselection criteria specified above; - More than 1 second has passed since the UE camped on the current serving cell. NOTE: If rangeToBestCell is configured on an NR frequency but absThreshSS-BlocksConsolidation is not configured, the UE considers that there is one beam above the threshold for each cell on that frequency. … Treselection RAT This specifies the cell reselection timer value. For each target NR frequency and for each RAT other than NR, a specific value of the cell reselection timer is defined that applies when evaluating reselection within NR or towards other RATs (i.e., Treselection RAT Treselection NR , for E-UTRAN it is Treselection EUTRA ). Note: Treselection RAT Not broadcast in system information, but used by the UE in reselection rules for each RAT. Treselection NR This specifies the cell reselection timer value Treselection for NR RAT This parameter may be set for each NR frequency as specified in TS 38.331[3]. 9.0 Inter-frequency cell reselection process for soft cell identity change on vehicle-mounted repeaters

[0241] The example implementation scheme and mode of Section 9.0 discloses an inter-frequency cell reselection process for a wireless terminal camped on a serving cell served by a vehicle-mounted repeater VMR, wherein the serving cell may perform a soft cell identity change as disclosed in Section 7.0, wherein the new neighbor cell operates at a frequency different from that of the old cell, i.e., the case of inter-frequency neighbor cells.

[0242] In a conventional cell reselection procedure, such as that specified in 3GPP TS 38.304, a wireless terminal may determine (1) whether to trigger measurements for discovering inter-frequency neighboring cells, and when such measurements are triggered, (2) whether to reselect the discovered cells. Listing 11 shows an example procedure for inter-frequency cell reselection described in TS 38.304.

[0243] List 11 The absolute priority of different NR frequencies or inter-RAT frequencies may be provided to the UE in the system information in the RRCRelease message or by inheritance from another RAT in inter-RAT cell (re)selection. In the case of system information, NR frequencies or inter-RAT frequencies may be listed without providing a priority (i.e., the field cellReselectionPriority does not exist for that frequency). If any field with cellReselectionPriority is provided in dedicated signaling, the UE shall ignore any field with cellReselectionPriority and any slice reselection information provided in the system information. If slice reselection information is provided in dedicated signaling, the UE shall ignore the slice reselection information provided in the system information. - The UE shall apply the following rules for the NR inter-frequencies and inter-RAT frequencies with priority indicated in the system information, as defined in 5.2.4.1: - For an inter-NR frequency or inter-RAT frequency with a higher reselection priority than the current NR frequency, the UE shall perform measurements of the higher priority inter-NR frequency or inter-RAT frequency according to TS 38.133 [8]. - For inter-NR frequencies with a reselection priority equal to or lower than the reselection priority of the current NR frequency, and for inter-RAT frequencies with a reselection priority lower than the reselection priority of the current NR frequency: - If the serving cell satisfies Srxlev>S nonIntraSearchP And Squal>S nonIntraSearch Q: - If distanceThresh is broadcasted in SIBxx and if the UE supports location based measurement initiation and has valid UE location information: - If the distance between the UE and the serving cell reference location is shorter than distanceThresh, the UE may choose not to perform measurements on NR inter-frequency cells of equal or lower priority or on inter-RAT frequency cells of lower priority; - Otherwise, the UE shall perform measurements on NR inter-frequency cells of equal or lower priority or on inter-RAT frequency cells of lower priority according to TS 38.133 [8]; - Otherwise, the UE may choose not to perform measurements on NR inter-frequency cells of equal or lower priority or on inter-RAT frequency cells of lower priority; Otherwise, the UE shall perform measurements on NR inter-frequency cells of equal or lower priority or on inter-RAT frequency cells of lower priority according to TS 38.133 [8].

[0244] As indicated in Listing 11, the operation of the inter-frequency cell reselection process may be based on the frequency priority configured for the wireless terminal. That is, if a frequency is assigned a higher priority than the priority of the serving cell frequency, the inter-frequency measurement on the frequency may be triggered unconditionally, otherwise the inter-frequency measurement on the frequency may be triggered based on the signal strength / quality of the serving cell. Listing 11 also indicates that: (i) the priority of the frequency may be given through system information (referred to as common cell reselection priority information) and / or through dedicated signaling (such as RRCRelease message) (referred to as dedicated cell reselection priority information), and (ii) if the priority of the frequency is provided by dedicated signaling, any priority provided by the system information may be ignored.

[0245] Listing 12 shows an example format of an RRCRelease message including an information element cellReselectionPriorities, which may include a list of frequencies and associated priority information for each of these frequencies. In Listing 12, timer T320 may indicate a duration from receipt of the RRCRelease message during which the priority given by the system information may be ignored. Once the timer expires, the priority provided by the RRCRelease message may be discarded.

[0246]

[0247] 38 shows the Fig. 27 However, in Fig.38 In the scenario of , cell 114c operates at a frequency Freq_c that is different from the frequency Freq_a of cell 114a. Fig.30 The process is applied to Fig.38 When the scene Fig.30 In act 30-6, wireless terminal 116a may receive an indication that a cell (i.e., cell 114c) is replacing a serving cell (i.e., cell 114a). Fig.38 In the scenario, since Freq_a and Freq_c are different, an indication such as newCellForPCIChange may be included in InterFreqNeighCellInfo of SIB4 as shown in Listing 13. As shown in Listing 13, an inter-frequency cell identified by a physCellId having newCellForPCIChange filled in may be considered as a new cell replacing a serving cell or an old cell, and dl-CarrierFreq and / or frequencyBandList associated with the physCellId may provide the frequency of the new cell.

[0248]

[0249] As disclosed in the example implementation scheme and mode of Section 8.0, in the case of a soft PCI change, it is desirable to ensure that the wireless terminal quickly triggers neighbor cell measurements on the frequency at which the new cell operates. In other words, measurements of the frequency of the new cell should take precedence over measurements of other frequencies. This can be achieved, for example, by assigning a higher priority than the serving cell or the highest priority among other cells including the serving cell to the frequency of the new cell (i.e., the phyCellId in the InterFreqNeigh-CellInfo filled with newCellForPCIChange). In one specific implementation, the priority of the new cell may be explicitly given by cellRelelectionPriority and / or cellReselection-SubPriority. In another specific implementation, a higher / highest priority may be implicitly indicated for the new cell.

[0250] If the wireless terminal is entering Fig.30 If dedicated signaling for cell reselection priority (such as the RRCRelease message of List 12) is received and stored before action 30-0 of , and if the stored cell reselection priority is still effective / valid (for example, timer T320 has not expired), then when the system information is acquired (for example, at action 30-6), an undesirable situation or operation may occur in the traditional cell reselection process. An undesirable operation that may occur in the traditional cell reselection process is that the cell reselection priority given by the dedicated signaling overrides the cell reselection priority configured by the system information. For example, the priority value of the frequency of the new cell in SIB4 received in action 30-6 may be overridden or ignored by the dedicated signaling, and therefore the new cell may not be reselected.

[0251] Thus, in the example implementation and mode of Section 9.0, the wireless terminal may invalidate / discard the stored cell reselection priority configured by dedicated signaling upon receiving system information indicating a soft cell identity change to transition to a new cell operating at a frequency different from that of the serving cell (e.g., the serving cell). In doing so, the wireless terminal is able to reselect the new cell in a timely manner, thereby eliminating the impact of the stored dedicated cell reselection priority. Reference Figure 39 to Figure 43 To illustrate the implementation of Section 8.0.

[0252] Fig.39 Example structure and functionality of portions of an example embodiment and mode communication system 100 (39) are shown. Fig.39For example, a core network 102 (39) and a radio access network are shown. The radio access network includes a carrier gNB node 104a, a mobile base station relay such as a mobile base station relay 112a (39), and a wireless terminal 116a (39). The wireless terminal 116a (39) is capable of communicating with Fig. 27 The wireless terminal 116a (27) or Fig.34 The wireless terminal 116a (34) is located in the network in a similar manner and may also be referred to as the wireless terminal 116 (39). Fig.39 The structure, function, and operation of the example embodiments and modes are substantially the same as those shown by corresponding reference numerals in the preceding figures, unless otherwise specified or apparent from the context.

[0253] exist Fig.39 In an example embodiment and mode, the core network 102 (39) includes one or more core network servers 746 (39), which may include one or more processors. The core network server 746 (39) includes a mobile relay base station manager 750. The core network 102 (39) and / or the core network server 746 (39) communicate with other entities or networks via an interface 756. Fig.39 As shown, the core network 102 ( 39 ) communicates with the radio access network via interface 756 .

[0254] The node of the core network 102 (39) is an example of a node of a communication network (e.g., a network entity) that can determine that two mobile relay base stations serving two respective cells having a common cell identity are or will be in a predetermined proximity and / or initiate a soft change of the cell identity of one of the two respective cells.

[0255] As in the previous embodiments and modes, the mobile base station relay mobile station relay 112 (39) includes a gNB controller 201; a relay controller 202; and a mobile terminal (MT) function 204. The gNB controller includes a transmit and receive point (TRP) 222, which in turn includes a transmitter 224 and a receiver 226.

[0256] exist Fig.39 In an example embodiment and mode of the present invention, the mobile station relay 112 (39) includes a system information generator 704 (39) and a memory or generator for inter-frequency neighbor cell information 900. Fig.40As shown, inter-frequency neighbor cell information 900 may include: (1) a cell identifier 901 of a neighbor cell; (2) a radio frequency 902 of a neighbor cell; (3) common cell reselection priority information 903 associated with the radio frequency of the neighbor cell, and (4) an indication 904 associated with the cell identifier of the neighbor cell. Indication 904 is used to indicate whether the serving cell will be replaced by the neighbor cell.

[0257] Fig.39 The wireless terminal 116a (39) is shown as including a transceiver circuit 276. The transceiver circuit 276 may in turn include a transmitter circuit 277 and a receiver circuit 278. The transceiver circuit 276 may include an antenna 279 for wireless transmission. The transmitter circuit 277 may include, for example, amplifiers, modulation circuits, and other conventional transmission equipment. The receiver circuit 278 may include, for example, amplifiers, demodulation circuits, and other conventional receiver equipment.

[0258] Fig.39 Also shown is a wireless terminal 116a (39), which is shown to also include wireless terminal processor circuitry, such as one or more wireless terminal processors 290 (39). The wireless terminal 116a (39) (e.g., wireless terminal processor 290 (39)) may include a frame / message generator / handler 294 and a cell (re)selection controller 630 (39). The (re)selection controller 630 (39) may also be referred to as a dedicated signaling priority override selection controller because, as described above, the cell (re)selection controller 630 (39) may invalidate / discard stored cell reselection priorities configured by dedicated signaling upon receiving system information indicating a soft cell identity change to transition to a new cell operating at a frequency different from that of a serving cell (e.g., a serving cell). In doing so, the wireless terminal is able to reselect a new cell in a timely manner, thereby eliminating the effects of the stored cell reselection priorities. In an example, illustrative, non-limiting example implementation and mode, the cell (re)selection controller 630 (39) may also include a serving cell replacement checker 910, a priority information memory 912, a priority information selector 914 and a cell (re)selector 916. 912 may store both dedicated cell reselection priority information DCRPI that can be received via dedicated signaling and inter-frequency neighbor cell information 900IFNCI received from the serving cell.

[0259] The wireless terminal 116a (39) may also include an interface 292, including one or more user interfaces. Such a user interface may be used for both user input and output operations. For example, the user interface may include a screen, such as a touch screen, that may display information to a user and receive information input by the user. For example, the user interface 292 may also include other types of devices, such as a speaker, a microphone, or a tactile feedback device.

[0260] exist Figure 39 to Figure 43 In the embodiment and mode of the invention, the receiver circuit 278 is configured to receive both the dedicated cell reselection priority information DCRPI and the inter-frequency neighbor cell information 900IFNCI via dedicated signaling. The inter-frequency neighbor cell information 900 may be included in a system information block. As indicated by arrow 920, Fig.39 It is shown that the inter-frequency neighbor cell information 900 is transmitted in a system information block SIB and is stored in a priority information memory 912. Dedicated cell reselection priority information DCRPI received through dedicated signaling is also stored in the priority information memory 912.

[0261] As described herein, the processor circuit 290 (which may include or be implemented by the cell (re)selection controller 630 (39)) stores dedicated cell reselection priority information, for example, in 912. In addition, the processor circuit 290 performs a cell reselection procedure based on the inter-frequency neighbor cell information. In the cell reselection procedure, in the case where the indication 904 indicates that the serving cell is to be replaced by a neighbor cell, the cell (re)selection controller 630 (39) does not use the dedicated cell reselection priority information in the cell reselection procedure. At this point, the serving cell replacement checker 910 determines whether the situation is such that the indication 904 indicates that the serving cell is to be replaced by a neighbor cell. Depending on the check performed by the serving cell replacement checker 910, the priority information selector 914 selects the dedicated cell reselection priority information DCRPI or the inter-frequency neighbor cell information 900IFNCI from the priority information stored in the priority information storage 912. The cell selection performed by the cell (re)selector 916 utilizes the priority information selected by the priority information selector 914.

[0262] Fig.41 It is used for Section 9.0 and Figure 39 to Figure 43 An example flow chart of a cell reselection process for a wireless terminal according to an example implementation scheme and mode. Fig.41 Examples, representative and non-limiting examples of activities performed by a wireless terminal are shown. It should be understood that Fig.41 Concerning specific, non-limiting illustrations, the general actions of the wireless terminal are as described elsewhere herein. Action 41-0 comprises the wireless terminal being in the RRC_IDLE or RRC_INACIVE state.

[0263] Action 41-1 includes the wireless terminal receiving SIB4 and determining whether there is newCellForPCIChange associated with at least one entry of InterFreqNeighCellInfo in the received SIB4. The determination of action 41-1 may be performed by the serving cell replacement checker 910. If yes, the wireless terminal proceeds to action 41-2, otherwise the wireless terminal proceeds to action 41-8. The reception of SIB4 may have been triggered by the method disclosed in Section 7.0, such as receiving a short message.

[0264] Action 41 - 2 includes the wireless terminal discarding the stored cell reselection priority configured by dedicated signaling, for example, discarding SIB4 of list 13 (if any).

[0265] Action 41 - 3 comprises the wireless terminal performing inter-frequency measurements based on the cell frequency priorities provided by SIB4.

[0266] Action 41-4 includes the wireless terminal checking whether a cell has been found due to inter-frequency measurement. If yes, execution of the process continues at action 41-5, otherwise, Fig.41 Repeat the process of action 41-3.

[0267] Action 41-5 includes the wireless terminal further checking whether the cell is a cell indicated by at least one entry of InterFreqNeighCellInfo associated with newCellForPCIChange. If the check of action 41-5 is positive, the wireless terminal proceeds to action 41-6. Otherwise, the wireless terminal proceeds to action 41-7.

[0268] Action 41 - 6 includes the wireless terminal reselecting a cell.

[0269] When the cell is not the cell associated with newCellForPCIChange, action 41-7 is performed. Action 41-7 includes the wireless terminal checking whether the cell reselection condition is met for the cell. If the check of action 41-7 is positive, the wireless terminal continues to perform action 41-6. Otherwise, the wireless terminal continues the inter-frequency measurement shown in action 41-3.

[0270] Action 41 - 8 includes the wireless terminal performing a conventional inter-frequency cell reselection procedure as shown in Listing 11 .

[0271] Fig.42 is a flow chart illustrating example representative steps or actions performed by a wireless terminal, such as, for example, wireless terminal 116a (39).

[0272] Action 42-1 comprises receiving dedicated cell reselection priority information via dedicated signaling. The dedicated cell reselection priority may comprise a priority of at least one radio frequency for a cell reselection procedure. The dedicated cell reselection priority information may be included in a radio resource control (RRC) release message.

[0273] Action 42 - 2 includes storing the dedicated cell reselection priority information in the wireless terminal. For example, the dedicated cell reselection priority information may be stored in the priority information memory 912 .

[0274] Action 42-3 includes receiving inter-frequency neighbor cell information 900 from the serving cell. As described above, the inter-frequency neighbor cell information 900 includes a cell identity 901 of the neighbor cell, a radio frequency 902 of the neighbor cell, common cell reselection priority information 903 associated with the radio frequency of the neighbor cell, and an indication 904 associated with the cell identity of the neighbor cell, the indication indicating whether the serving cell is to be replaced by the neighbor cell. The common cell reselection priority information 903 may include a priority of the radio frequency of the neighbor cell for the cell reselection process. The inter-cell neighbor information may be included in a system information block (SIB). Action 42-4 includes performing a cell reselection procedure based on the inter-frequency neighbor cell information. During the cell reselection procedure, in the event that the indication 104 indicates that the serving cell will be replaced by a neighbor cell, the dedicated cell reselection priority information may be invalidated and / or discarded as determined by the serving cell replacement checker 910. In other words, in the event that the indication 104 indicates that the serving cell will be replaced by a neighbor cell, the processor circuit of the wireless terminal does not use the dedicated cell reselection priority information. In the event that the indication does not indicate that the serving cell will be replaced by a neighbor cell, for example, the dedicated cell reselection priority information as stored in the priority information memory 912 may be used for the cell reselection procedure, and the public cell reselection priority information may be ignored.

[0275] Fig.43 is shown by a mobile base station repeater (e.g., Fig.39 A flowchart of example representative steps or actions performed by a mobile base station repeater 112a (39)).

[0276] Action 43-1 includes generating inter-frequency neighbor cell information 900. As described above, the inter-frequency neighbor cell information 900 may include a cell identity 901 of a neighbor cell, a radio frequency 902 of the neighbor cell, public cell reselection priority information 903 associated with the radio frequency of the neighbor cell, and an indication 904 associated with the cell identity of the neighbor cell. Indication 904 indicates whether the serving cell is to be replaced by the neighbor cell. Public cell reselection priority information 903 may include a priority of the radio frequency of the neighbor cell for the cell reselection process. Inter-cell neighbor information 900 may be included in a system information block (SIB). The wireless terminal may use the inter-frequency neighbor cell information to perform a cell reselection process.

[0277] Action 43-2 includes transmitting inter-frequency neighbor cell information. Fig.39 904 indicates that the serving cell will be replaced by a neighboring cell, and if the wireless terminal stores dedicated cell reselection priority information, the dedicated cell reselection priority information may be invalidated and discarded. The dedicated cell reselection priority information may include a priority of at least one radio frequency for the cell reselection process. In the case where the indication does not indicate that the serving cell will be replaced by a neighboring cell, the dedicated cell reselection priority information may be used for the cell reselection process, and the public cell reselection priority information may be ignored. The dedicated cell reselection priority information may be included in a radio resource control (RRC) release message. 10.0 Cell Reselection Procedure for Hard Cell Identity Change

[0278] Section 7.0 of this document defines "hard cell identity change" as the operation of a mobile base station repeater serving a cell (i.e., serving an old cell) to change the cell identity of a cell by shutting down / deactivating the old cell and then starting / activating a new cell with a different cell identity. In a conventional cellular communication system such as the 5G New Radio (NR) system standardized by 3GPP, when the old cell is shut down, a wireless terminal residing on the old cell will eventually detect that the network coverage of the old cell is lost, and a cell reselection process may then be initiated to attempt to discover a suitable neighboring cell. The detection of the cell of the lost network and the discovery of a suitable neighboring cell may take some time, which may potentially result in lost paging and / or delayed initiation of network service. In addition, the cell reselection process may discover cells other than the new cell, i.e., cells other than the cell that is replacing the old cell. This discovery of another cell may not be ideal for a wireless terminal carried on or located on a vehicle that also accommodates a mobile base station repeater.

[0279] Figures 44 to 49The example embodiments and modes of and Section 10.0 of this document disclose an enhanced method to optimize the cell reselection process for such hard cell identity changes. Fig.44 An example implementation and mode of the communication system 20 (44) is shown in which an enhanced method for optimizing the cell reselection process for such hard cell identity changes may be implemented. Fig.45 Shows Fig.44 An example scenario of a hard cell identity change for a communication system is depicted in FIG. Fig.45 The scenario shown is similar to Fig.28 The scene shown, but in Fig.45 In FIG. 1 , after cell 11a with PCI x is deactivated at time T4, cell 114c with PCI y will not be activated until time T5. Time T5 may also be considered as the time at which the wireless terminal may begin triggering measurements to discover cell 114c.

[0280] Fig.46 yes Fig.45 Another view of the scenario shown, where network coverage 3100 of cell 114a continues on frequency F1 until time T4, and network coverage 3102 of cell 114c begins on frequency F2 at time T5. The period between T4 and T5 can be considered a network coverage gap caused by a hard cell identity (PCI) change of mobile base station relay 112a. Frequency F2 can be the same or different from frequency F1. If F1 and F2 are the same, PCI x and PCI y must be different to avoid conflicts, otherwise, PCI x and PCI y can be the same or different.

[0281] In such Figures 44 to 49 In the example implementation and mode shown in Section 10.0, after the network makes a decision to change the cell identity of a cell served by a mobile base station relay and before the cell is deactivated, the wireless terminal may be configured with information related to the hard cell identity change. 10.1 Example General Architecture

[0282] Fig.44 Example structure and functionality of portions of an example embodiment and mode communication system 100 (34) are shown. Fig.44 For example, a core network 102 (44) and a radio access network are shown. The radio access network includes a carrier gNB node 104a, a mobile base station relay such as a mobile base station relay 112a (44), and a wireless terminal 116a (44). The wireless terminal 116a (44) is capable of communicating with Fig. 27 The wireless terminal 116a (27) is located in the network in a similar manner and may also be referred to as the wireless terminal 116 (44). Fig.44The structure, function, and operation of the example embodiments and modes are substantially the same as those shown by corresponding reference numerals in the preceding figures, unless otherwise specified or apparent from the context.

[0283] exist Fig.44 In an example embodiment and mode, the core network 102 (44) includes one or more core network servers 746 (44), which may include one or more processors. The core network server 746 (44) includes a mobile relay base station manager 750. The core network 102 (44) and / or the core network server 746 (44) communicate with other entities or networks via an interface 756. Fig.44 As shown, the core network 102 ( 44 ) communicates with the radio access network via interface 756 .

[0284] A node of the core network 102 (44) is an example of a node of a communication network (eg, a network entity) that may make a determination to change the cell identity of a cell served by a mobile base station relay.

[0285] As in the previous embodiments and modes, the mobile base station relay 112 (44) includes a gNB controller 201; a relay controller 202; and a mobile terminal (MT) function 204. The mobile base station relay 112a (44) may include one or more mobile station relay processors or mobile station processor circuits, generally shown as a mobile station relay processor 200, which may in turn include or host at least part of one or more of the gNB controller 201, the relay controller 202, and the mobile terminal (MT) function 204.

[0286] The mobile terminal (MT) function 204 includes a transmitter circuit 206 and a receiver circuit 208. The gNB controller includes a transmit and receive point (TRP) 222, which in turn includes a transmitter 224 and a receiver 226. Figure 2 As shown, the mobile base station repeater 112 exist Fig.44In an example embodiment and mode of the present invention, the mobile station relay 112 (44) includes a cell identity change information generator / memory 940. The cell identity change information generator / memory 940 may be part of or hosted by the mobile station relay processor 200 or any other memory device. The cell identity change information includes: (1) second cell information, including a cell identity and operating frequency of the second cell; and (2) an activation time, after which the second cell can be measured. The cell identity change information is configured for use by the wireless terminal to perform a cell reselection process to reselect the second cell at or after the activation time. The mobile station relay processor 200 may also include a configuration information message generator 942 and / or other functionality shown in one or more other embodiments described herein. The configuration information message generator 942 is configured to and used to generate one or more configuration messages 944, which include, for example, cell identity change information.

[0287] Fig.44 The wireless terminal 116a (44) is shown as including a transceiver circuit 276. The transceiver circuit 276 may in turn include a transmitter circuit 277 and a receiver circuit 278. The transceiver circuit 276 may include an antenna 279 for wireless transmission. The transmitter circuit 277 may include, for example, amplifiers, modulation circuits, and other conventional transmission equipment. The receiver circuit 278 may include, for example, amplifiers, demodulation circuits, and other conventional receiver equipment.

[0288] Fig.44 Also shown is a wireless terminal 116a (44), which is shown to also include wireless terminal processor circuitry, such as one or more wireless terminal processors 290. The wireless terminal 116a (44) (e.g., wireless terminal processor 290 (44)) may include a frame / message generator / handler 294 and a cell (re)selection controller 630 (44). Fig.44 The (re)selection controller 630 (44) further includes a hard cell identity change reselection controller 950. The hard cell identity change reselection controller 950, which may be implemented or hosted by the wireless terminal processor 290, is configured and used to perform a cell reselection process to reselect a second cell at or after the activation time. The cell reselection process is performed based on the cell identity change information provided in the message generated by the configuration information message generator 942. The wireless terminal 116a (44) may also include an interface 292, including one or more user interfaces. Such a user interface may be used for both user input and output operations. For example, the user interface may include a screen, such as a touch screen, that may display information to a user and receive information input by the user. For example, the user interface 292 may also include other types of devices, such as a speaker, a microphone, or a tactile feedback device. 10.2 Example Operation

[0289] As mentioned above, in Figures 44 to 49 In the example implementation and mode shown in Section 10.0, after the network makes a decision to change the cell identity of a cell served by a mobile base station relay and before the cell is deactivated, the wireless terminal may be configured with information related to the hard cell identity change. Fig.45 or Fig.46 In time T3, Fig.46 The mobile station relay 112a (44) may signal a configuration message 944, which may include an indication of, for example, (1) a hard PCI change, (2) a time T4, (3) a time T5, and (4) information about the cell 114c. The configuration message 944 may be carried by system information, a MAC control element, or physical layer signaling (such as a PDCCH). The information about the cell 114c may include at least sufficient information to perform measurements and discover the cell 114c, such as frequency and a cell identity (e.g., PCI).

[0290] The wireless terminal 116 (44) receiving the configuration message 944 may perform the following actions: During time T3 to T4: the wireless terminal may attempt to remain resident on cell 114a. In the typical case where the wireless terminal is in a vehicle covered by cell 114a, the wireless terminal may not reselect another cell because the network coverage of the old cell may be stable. However, if a passenger with a wireless terminal leaves the vehicle during T3 to T4, the network coverage of cell 114a may weaken, which may trigger measurements for cell reselection, and the new cell 114c may not yet be available during cell reselection. The wireless terminal of the example implementation scheme and mode of Section 10 may therefore perform a conventional cell reselection process, such as the process shown in Section 4, except that during this time period, measurements based on information about the new cell (e.g., cell 114c) may not be performed. In other words, during T3 to T4, the wireless terminal will not attempt to discover cell 114c. During time T4 to T5: If the wireless terminal remains camped on cell 114a until time T4, the wireless terminal may wait for time T5. During this time period, the wireless terminal may not perform measurements on the old cell (i.e., cell 114a) or the new cell (e.g., cell 114c). If the wireless terminal leaves cell 114a before time T4, a conventional cell reselection process may be performed, but similar to the situation from T3 to T4, measurements on the new cell (e.g., cell 114c) may not be performed. • At time T5 and later: the wireless terminal may perform measurements on cell 114c. During this time period, measurements on cell 114c may be triggered unconditionally; the old cell 114a is not measured. At time 5, the old cell 114a has been deactivated.

[0291] In one example implementation, the aforementioned configuration message 944 may be one or more system information blocks (SIBs) broadcast from the mobile base station relay via its serving cell, such as the cell 114a served by the mobile base station relay 112a (44). For example, if Fig.45 If cell 114c operates on the same frequency as cell 114a, SIB3 of List 7 may be used, wherein IntraFreqNeighCellInfo is replaced by IntraFreqNeighCellInfo of List 14; otherwise SIB4 of List 13 may be used, wherein InterFreqNeighCellInfo is replaced by InterFreqNeighCellInfo of List 14. Similar to List 7 or List 13, List 14 shows that the presence of the optional field newCellForPCIChange indicates that a cell identity (e.g., PCI) change will occur. In addition, the presence of the optional field HardPCIChangeConfig indicates that the cell identity change may be a hard cell identity change. If HardPCIChangeConfig does not exist, the cell identity change may be a soft cell identity change as disclosed in Section 7.0. HardPCIChangeConfig may include deactivationTime (absolute time for deactivating the old cell 114a, Fig.45 and Fig.46 time T4) and gapDuration (the gap between deactivationTime and the time when the wireless terminal can start measuring the new cell 114c, such as the period T4 to T5).

[0292]

[0293] It should be noted that configuring times T4 and T5 may be accomplished in a manner different from that shown in Listing 14. For example, the absolute time (deactivationTIme of Listing 14) may be replaced by a time value relative to the SIB3 / SIB4 transmission time. The example implementations and modes of Section 10.0 are intended to cover any other alternative ways of specifying times T4 and T5.

[0294] Fig.47 Shown for Fig.44 communication systems and e.g. Fig.45 The following describes an example message flow and associated events for a scenario. Fig.47 Actions: Action 47-0: The wireless terminal 116a (44) is in the RRC_IDLE or RRC_INACTIVE state.

[0295] Action 47-1: In Fig.45 At time T1, wireless terminal 116a (44) resides in cell 114a (PCI x) served by mobile base station repeater 112a (44).

[0296] Action 47-2: In Fig.45 At time T2, network entity 746 (44) decides to deactivate cell 114a and sends a cell deactivation message to mobile station relay 112a (44).

[0297] Action 47-3: In Fig.45 At time T3, or at a time between T3 and T5, the network entity decides to activate cell 114c (PCI y) and sends a cell activation message (144) to the mobile base station repeater 112a. Note that action 47-2 and action 47-3 may occur simultaneously. In this case, the cell deactivation message and the cell activation message may be sent in the same container (e.g., packet). In addition, the network may or may not specify times T4 and T5 in the deactivation / activation message; if not specified, the wireless terminal 116a (44) may decide to determine times T4 and T5. The mobile base station repeater activates cell 114c with PCI y. Cell 114c begins transmitting broadcast signals, such as system information.

[0298] Action 47-4: Cell 114a broadcasts a short message, such as the short message of Table 6-1 or Table 6-2.

[0299] Action 47-5: The short message of action 47-4 triggers a system information acquisition process at the wireless terminal 116a (44) to acquire the latest system information from the cell 114a.

[0300] Action 47 - 6 : The wireless terminal 116 a ( 44 ) acquires system information, including SIB1 and other related SIBs, such as SIB3 of List 7 and / or SIB4 of List 13 with the modification shown in List 14 .

[0301] Action 47-7: At time T4, mobile base station relay 112a (44) deactivates cell 114a. Wireless terminal 116a (44) may stop measuring / evaluating cell 114a and wait for time T5.

[0302] Action 47-8: At or before time T5, the mobile base station repeater activates cell 114c with PCI y. Cell 114c begins transmitting broadcast signals, such as system information.

[0303] Action 47-9: At time T5 specified in the system information received in action 47-6, the wireless terminal 116a (44) performs a cell reselection procedure. Based on the system information, the wireless terminal 116a (44) starts measurements on the cell 114c and eventually reselects the cell 114c.

[0304] Action 47-10: The wireless terminal 116a (44) acquires system information from the cell 114c and camps on the cell 114c.

[0305] Fig.48 is a wireless terminal (e.g., Fig.44 Flowchart of example representative steps or actions performed by a wireless terminal 116a (44)) communicating with a first cell served by a mobile base station relay.

[0306] Action 48-1 includes: receiving cell identity change information from the first cell. The cell identity change information may include: second cell information, the second cell information including the cell identity of the second cell; and an activation time, after which the second cell can be measured. The cell identity change information may also include a deactivation time, at which the first cell will be deactivated. The deactivation time may be equal to or earlier than the activation time. In an example implementation, the second cell information may also optionally include an operating frequency of the second cell. The cell identity of the second cell may be different from the cell identity of the first cell. The second cell may also be served by a mobile base station repeater. The cell identity change information may be included in one or more system information blocks (SIBs).

[0307] Action 49-2 includes: performing a cell reselection process based on the cell identity change information to reselect the second cell at or after the activation time. After the deactivation time, the wireless terminal may stop evaluating the first cell. In addition, before the activation time, the wireless terminal may prevent the use of the second cell information to perform measurements.

[0308] Fig.49 is a mobile base station repeater (e.g., Fig.45 Flowchart of example representative steps or actions performed by a mobile base station repeater 112a (44)) of FIG. 1 that serves a wireless terminal via a first cell.

[0309] Action 49-1 includes: generating cell identity change information. The cell identity change information may include: second cell information, the second cell information including the cell identity of the second cell; and an activation time, after which the second cell can be measured. The cell identity change information may also include a deactivation time, at which the first cell will be deactivated. The deactivation time may be equal to or earlier than the activation time. In an example implementation, the second cell information may also optionally include an operating frequency of the second cell. The cell identity of the second cell may be different from the cell identity of the first cell. The second cell may also be served by a mobile base station repeater. The cell identity change information may be included in one or more system information blocks (SIBs).

[0310] Action 34-2 includes transmitting cell identity change information to the wireless terminal. The cell identity change information may be used by the wireless terminal to perform a cell reselection procedure to reselect a second cell at or after the activation time. 11.0 Other Notes

[0311] Thus, in some example aspects, the technology disclosed herein relates to the structure and operation of mobile base station relays and nodes operating in conjunction therewith, including but not limited to the following: The access node serving the cell transmits serving cell mobility information including the mobility status of the cell. The wireless terminal uses the serving cell mobility information to detect the mobility of the cell. • The access node serving the cell transmits neighbor cell mobility information including the mobility status of the neighbor cells. The wireless terminal uses the neighbor cell mobility information to detect the mobility of the neighbor cells. · Serving cell mobility information and / or neighboring cell mobility information is used for cell reselection process based on the mobility status of the serving cell and / or neighboring cell. The neighbor cell relative mobility information is configured by the serving cell to the wireless terminal. The neighbor cell relative mobility information indicates the mobility state of the neighbor cell relative to the serving cell. A cell reselection process is performed on the neighbor cell based on the neighbor cell relative mobility information. The mobile base station repeater installed on the vehicle transmits vehicle information including information about the vehicle to the wireless terminal. The wireless terminal can perform cell selection / reselection using the vehicle information. The mobile base station relay provides the wireless terminal with a notification of the soft cell identity change and information about the new cell that will replace the current cell via the current cell. The wireless terminal can reselect the new cell based on the notification and the information. • During the cell reselection process, intra-frequency measurements and reselection of a new cell are performed based on whether the soft cell identity change is notified. Upon receiving information indicating a soft cell identity change for replacing a serving cell with an inter-frequency cell, the dedicated cell reselection priority configured by dedicated signaling may be discarded / invalidated. The mobile base station relay provides the wireless terminal with a notification of the hard cell identity change and information about a new cell that will replace the current cell after the current cell is deactivated via the current cell. The wireless terminal reselects the new cell based on the notification and the information.

[0312] It should be understood that various of the foregoing example embodiments and modes may be used in combination with one or more of the other example embodiments and modes described herein.

[0313] Certain units and functions of system 100 may be implemented by electronic machinery. For example, electronic machinery may refer to processor circuits described herein, such as terminal processor circuit 290, mobile station relay processor 200, and node processor 424. In addition, the term "processor circuit" is not limited to meaning one processor, but may include multiple processors, where multiple processors operate at one or more sites. In addition, as used herein, the term "server" is not limited to one server unit, but may cover multiple servers and / or other electronic equipment, and may be located at one site or distributed to different sites. Based on these understandings, Fig.50 An example of an electronic machine (e.g., a processor circuit) is shown as including one or more processors 1090, a program instruction memory 1092; other memory 1094 (e.g., RAM, cache, etc.); input / output interfaces 1096 and 1097, a peripheral interface 1098; support circuits 1099, and a bus 1400 for communication between the aforementioned units. The processor 1090 may include the processor circuits described herein, such as the terminal processor circuit 290, the node processor circuit 424, and the mobile station relay processor 200, or any processor of a network entity of the core network.

[0314] The memory or registers described herein may be depicted as memory 394 or any computer readable medium, which may be one or more of readily available memory such as random access memory (RAM), read-only memory (ROM), floppy disk, hard disk, flash memory, or any other form of digital storage (local or remote), and preferably has non-volatile properties, and thus may include memory. Support circuits 1099 are coupled to processor 1090 to support the processor in a conventional manner. These circuits include caches, power supplies, clock circuits, input / output circuits and subsystems, etc.

[0315] The term "configured" may relate to the capabilities of a device, whether the device is in an operational or non-operational state. "Configured" may also refer to specific settings in a device that implement operational characteristics of the device, whether the device is in an operational or non-operational state. In other words, hardware, software, firmware, registers, memory values, etc. may be "configured" within a device to provide specific characteristics for the device, whether the device is in an operational or non-operational state.

[0316] The interface may be a hardware interface, a firmware interface, a software interface, and / or a combination thereof. The hardware interface may include connectors, wires, electronic devices such as drivers, amplifiers, and the like. The software interface may include code stored in a memory device to implement protocols, protocol layers, communication drivers, device drivers, combinations thereof, and the like. The firmware interface may include a combination of embedded hardware and code stored in and / or in communication with a memory device to implement connections, electronic device operations, protocols, protocol layers, communication drivers, device drivers, hardware operations, combinations thereof, and the like.

[0317] Although the processes and methods of the disclosed embodiments may be discussed as being implemented as software routines, some of the method steps disclosed therein may be performed in hardware and by a processor running the software. Thus, the embodiments may be implemented in software executed on a computer system, in hardware such as an application specific integrated circuit or other type of hardware implementation, or in a combination of software and hardware. The software routines of the disclosed embodiments can be executed on any computer operating system and can be executed using any CPU architecture.

[0318] The functions of the various elements including functional blocks (including but not limited to those labeled or described as "computers", "processors" or "controllers") may be provided through the use of hardware such as circuit hardware and / or hardware capable of executing software in the form of programming instructions stored on computer-readable media. Therefore, such functions and illustrated functional blocks should be understood to be hardware-implemented and / or computer-implemented, and therefore machine-implemented.

[0319] In terms of hardware implementation, the functional blocks may include or encompass, but are not limited to, digital signal processor (DSP) hardware, a reduced instruction set processor, hardware (e.g., digital or analog) circuits, including but not limited to one or more application specific integrated circuits [ASICs] and / or one or more field programmable gate arrays (FPGAs), and (where appropriate) state machines capable of performing such functions.

[0320] In terms of computer implementation, a computer is generally understood to include one or more processors or one or more controllers, and the terms computer and processor and controller are used interchangeably herein. When provided by a computer or processor or controller, these functions may be provided by a single dedicated computer or processor or controller, by a single shared computer or processor or controller, or by multiple separate computers or processors or controllers (some of which may be shared or distributed). In addition, the use of the term "processor" or "controller" may also be interpreted to refer to other hardware capable of performing such functions and / or executing software, such as the exemplary hardware described above.

[0321] Nodes that communicate using the air interface also have suitable radio communication circuits.In addition, the technology disclosed herein may be further considered to be fully embodied in any form of computer-readable memory, such as a solid-state memory, a magnetic disk, or an optical disk containing a suitable set of computer instructions that will cause a processor to perform the technology described herein.

[0322] The technology of the example embodiments and modes described herein covers a non-transitory computer-readable medium encoded with a computer program that, when executed by a computer or processor of a wireless terminal described herein, causes the computer to implement the actions described herein, and / or a non-transitory computer-readable medium encoded with a computer program that, when executed by a computer or processor of a mobile base station repeater described herein, causes the computer to implement the actions described herein.

[0323] In addition, each functional block or various features of the wireless terminal and node adopted in each of the above-mentioned embodiments can be implemented or executed by a circuit (which is generally an integrated circuit or multiple integrated circuits). The circuit designed to perform the functions described in this specification may include a general-purpose processor, a digital signal processor (DSP), a dedicated or general-purpose integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices or discrete hardware components or a combination thereof. The general-purpose processor can be a microprocessor, or alternatively, the processor can be a conventional processor, a controller, a microcontroller or a state machine. The general-purpose processor or each of the above-mentioned circuits can be configured by a digital circuit, or can be configured by an analog circuit. In addition, when the technology of making an integrated circuit that replaces the current integrated circuit appears due to the progress of semiconductor technology, the integrated circuit produced by the technology can also be used.

[0324] It should be understood that the technology disclosed herein is intended to solve problems centered on radio communications and must be rooted in computer technology and overcome problems that specifically occur in radio communications. In addition, the technology disclosed herein improves cell selection in a communication system and can do so by considering neighboring cell relative mobility information.

[0325] The technology disclosed herein encompasses one or more of the following non-limiting, non-exclusive exemplary embodiments and modes: Example implementation scheme 1: A wireless terminal of a cellular telecommunication system, the wireless terminal communicating with a first cell served by a mobile base station repeater, the wireless terminal comprising: a receiver circuit, the receiver circuit being configured to receive cell identification change information from the first cell, the cell identification change information comprising: second cell information, the second cell information comprising a cell identification of the second cell; and an activation time, after which the second cell can be measured; a processor circuit, the processor circuit being configured to perform a cell reselection process based on the cell identification change information to reselect the second cell at or after the activation time.

[0326] Example implementation 2: The wireless terminal according to example implementation 1, wherein the cell identity change information further includes a deactivation time, at which the first cell is to be deactivated.

[0327] Example implementation 3: A wireless terminal according to example implementation 2, wherein the deactivation time is equal to or earlier than the activation time.

[0328] Example Implementation 4: A wireless terminal according to Example Implementation 2, wherein after the deactivation time, the processor circuit is further configured to stop evaluating the first cell.

[0329] Example Implementation 5: The wireless terminal according to Example Implementation 1, wherein the cell identifier of the second cell is different from the cell identifier of the first cell.

[0330] Example Implementation 6: The wireless terminal of Example Implementation 1, wherein the second cell is served by the mobile base station relay.

[0331] Example Implementation 7: A wireless terminal according to Example Implementation 1, wherein the cell identity change information is included in one or more system information blocks (SIBs).

[0332] Example embodiment 8: The wireless terminal according to example embodiment 1, wherein before the activation time, the processor circuit is further configured to prevent the use of the second cell information to perform measurements.

[0333] Example implementation 9: A wireless terminal according to example implementation 1, wherein the second cell information includes an operating frequency of the second cell.

[0334] Example implementation scheme 10: A mobile base station repeater of a cellular telecommunication system, the mobile base station repeater serving a wireless terminal via a first cell, the mobile base station repeater comprising: a processor circuit, the processor circuit being configured to generate cell identification change information, the cell identification change information comprising: second cell information, the second cell information comprising a cell identification of a second cell; and an activation time, after which the second cell can be measured; a transmitter circuit, the transmitter circuit being configured to transmit the cell identification change information to the wireless terminal, and wherein the cell identification change information is configured for use by the wireless terminal to perform a cell reselection process to reselect the second cell at or after the activation time.

[0335] Example embodiment 11: The mobile base station relay according to example embodiment 10, wherein the cell identity change information further includes a deactivation time, at which the first cell is to be deactivated.

[0336] Example embodiment 12: The mobile base station relay according to example embodiment 11, wherein the deactivation time is equal to or earlier than the activation time.

[0337] Example embodiment 13: The mobile base station relay according to example embodiment 10, wherein the cell identifier of the second cell is different from the cell identifier of the first cell.

[0338] Example Implementation 14: The mobile base station relay of Example Implementation 10, wherein the second cell is served by the mobile base station relay.

[0339] Example embodiment 15: The mobile base station relay according to example embodiment 10, wherein the cell identity change information is included in one or more system information blocks (SIBs).

[0340] Example embodiment 15: The mobile base station repeater according to example embodiment 10, wherein the second cell information includes an operating frequency of the second cell.

[0341] Example implementation 17: A method for a wireless terminal of a cellular telecommunication system, the wireless terminal communicating with a first cell served by a mobile base station repeater, the method comprising: receiving cell identification change information from the first cell, the cell identification change information comprising: second cell information, the second cell information comprising a cell identification of the second cell; and an activation time, after which the second cell can be measured; performing a cell reselection process based on the cell identification change information to reselect the second cell at or after the activation time.

[0342] Example embodiment 18: The method according to example embodiment 17, wherein the cell identity change information further includes a deactivation time, and the first cell is to be deactivated at the deactivation time.

[0343] Example embodiment 19: The method according to example embodiment 18, wherein the deactivation time is equal to or earlier than the activation time.

[0344] Example Implementation 20: The method according to Example Implementation 18 further includes: stopping evaluating the first cell after the deactivation time.

[0345] Example Implementation 21: The method of Example Implementation 17, wherein the cell identifier of the second cell is different from the cell identifier of the first cell.

[0346] Example Implementation 21: The method of Example Implementation 17, wherein the second cell is served by the mobile base station relay.

[0347] Example Implementation 23: The method of Example Implementation 17, wherein the cell identity change information is included in one or more system information blocks (SIBs).

[0348] Example Implementation 24: The method according to Example Implementation 17 further includes: preventing the use of the second cell information to perform measurements before the activation time.

[0349] Example Implementation 25: The method of Example Implementation 17, wherein the second cell information includes an operating frequency of the second cell.

[0350] Example implementation 26: A method for a mobile base station repeater for a cellular telecommunication system, the mobile base station repeater serving a wireless terminal via a first cell, the method comprising: generating cell identification change information, the cell identification change information comprising: second cell information, the second cell information comprising a cell identification of a second cell; and a second value indicating an activation time, after which the second cell can be measured; transmitting the cell identification change information to the wireless terminal, and wherein the cell identification change information is configured for use by the wireless terminal in performing a cell reselection process to reselect the second cell at or after the activation time.

[0351] Example embodiment 27: The method according to example embodiment 26, wherein the cell identity change information further includes a deactivation time, and the first cell is to be deactivated at the deactivation time.

[0352] Example embodiment 28: The method according to example embodiment 27, wherein the deactivation time is equal to or earlier than the activation time.

[0353] Example Implementation 29: The method of Example Implementation 26, wherein the cell identifier of the second cell is different from the cell identifier of the first cell.

[0354] Example Implementation 30: The method of Example Implementation 26, wherein the second cell is served by the mobile base station relay.

[0355] Example Implementation 31: A method according to Example Implementation 26, wherein the cell identity change information is included in one or more system information blocks (SIBs).

[0356] Example Implementation 32: The method of Example Implementation 26, wherein the second cell information includes an operating frequency of the second cell.

[0357] One or more of the following documents may be relevant to the technology disclosed herein (all of which are incorporated herein by reference in their entirety): 3GPP TS 38.304 v16.1.0 3GPP TS 38.331 v16.1.0 3GPP TR 22.839 v18.1.0 Although the above description contains many specific instructions, these should not be interpreted as limiting the scope of the technology disclosed herein, but only as providing illustrations for some current preferred embodiments of the technology disclosed herein. Therefore, the scope of the technology disclosed herein should be determined by the attached claims and their legal equivalents. Therefore, it should be understood that the scope of the technology disclosed herein fully encompasses other embodiments that may become obvious to those skilled in the art, and therefore the scope of the technology disclosed herein is limited only by the attached claims, in which the reference element in the singular form does not mean "only one" (unless explicitly stated as such), but refers to "one or more". The above embodiments can be combined with each other. All structural, chemical and functional equivalents of the elements of the above preferred embodiments known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be covered by the present claims. In addition, a device or method does not necessarily solve every problem that the technology disclosed herein seeks to solve, because it will be covered by the present claims. In addition, the elements, components or method steps of the present disclosure are not intended to be dedicated to the public, regardless of whether the elements, components or method steps are explicitly stated in the claims.

[0358] In one example, a wireless terminal of a cellular telecommunication system, the wireless terminal communicating with a first cell served by a mobile base station repeater, the wireless terminal comprising: a receiver circuit configured to receive cell identification change information from the first cell, the cell identification change information comprising: second cell information, the second cell information comprising a cell identification of the second cell; and an activation time after which the second cell can be measured; and a processor circuit configured to perform a cell reselection process based on the cell identification change information to reselect the second cell at or after the activation time.

[0359] In one example, according to the wireless terminal, the cell identity change information further includes a deactivation time, and the first cell will be deactivated at the deactivation time.

[0360] In one example, according to the wireless terminal, the deactivation time is equal to or earlier than the activation time.

[0361] In one example, according to the wireless terminal, wherein after the deactivation time, the processor circuit is further configured to stop evaluating the first cell.

[0362] In one example, according to the wireless terminal, the cell identifier of the second cell is different from the cell identifier of the first cell.

[0363] In one example, according to the wireless terminal, the second cell is served by the mobile base station relay.

[0364] In one example, according to the wireless terminal, the cell identity change information is included in one or more system information blocks (SIBs).

[0365] In one example, according to the wireless terminal, wherein before the activation time, the processor circuit is further configured to prevent performing measurements using the second cell information.

[0366] In one example, according to the wireless terminal, the second cell information includes an operating frequency of the second cell.

[0367] In one example, a mobile base station repeater of a cellular telecommunication system, the mobile base station repeater serving a wireless terminal via a first cell, the mobile base station repeater comprising: a processor circuit, the processor circuit being configured to generate cell identification change information, the cell identification change information comprising: second cell information, the second cell information comprising a cell identification of a second cell; and an activation time, after which the second cell can be measured; a transmitter circuit, the transmitter circuit being configured to transmit the cell identification change information to the wireless terminal, and wherein the cell identification change information is configured for use by the wireless terminal to perform a cell reselection process to reselect the second cell at or after the activation time.

[0368] In one example, according to the mobile base station relay, the cell identity change information further includes a deactivation time, and the first cell will be deactivated at the deactivation time.

[0369] In one example, according to the mobile base station relay, the deactivation time is equal to or earlier than the activation time.

[0370] In one example, according to the mobile base station relay, the cell identifier of the second cell is different from the cell identifier of the first cell.

[0371] In one example, according to the mobile base station relay, the second cell is served by the mobile base station relay.

[0372] In one example, according to the mobile base station relay, the cell identity change information is included in one or more system information blocks (SIBs).

[0373] In one example, according to the mobile base station repeater, the second cell information includes an operating frequency of the second cell.

[0374] In one example, a method for a wireless terminal of a cellular telecommunication system, the wireless terminal communicating with a first cell served by a mobile base station repeater, the method comprising: receiving cell identification change information from the first cell, the cell identification change information comprising: second cell information, the second cell information comprising a cell identification of the second cell; and an activation time after which the second cell can be measured; and performing a cell reselection process based on the cell identification change information to reselect the second cell at or after the activation time.

[0375] In one example, according to the method, the cell identity change information further includes a deactivation time, and the first cell will be deactivated at the deactivation time.

[0376] In one example, according to the method, the deactivation time is equal to or earlier than the activation time.

[0377] In one example, according to the method, it also includes: after the deactivation time, stopping evaluating the first cell.

[0378] In one example, according to the method, the cell identifier of the second cell is different from the cell identifier of the first cell.

[0379] In one example, according to the method, the second cell is served by the mobile base station relay.

[0380] In one example, according to the method, the cell identity change information is included in one or more system information blocks (SIBs).

[0381] In one example, according to the method, the further step includes: before the activation time, preventing the use of the second cell information to perform measurement.

[0382] In one example, according to the method, the second cell information includes an operating frequency of the second cell.

[0383] In one example, a method for a mobile base station repeater of a cellular telecommunication system, the mobile base station repeater serving a wireless terminal via a first cell, the method comprising: generating cell identification change information, the cell identification change information comprising: second cell information, the second cell information comprising a cell identification of a second cell; and a second value indicating an activation time, after which the second cell can be measured; transmitting the cell identification change information to the wireless terminal, and wherein the cell identification change information is configured for use by the wireless terminal to perform a cell reselection process to reselect the second cell at or after the activation time.

[0384] In one example, according to the method, the cell identity change information further includes a deactivation time, and the first cell will be deactivated at the deactivation time.

[0385] In one example, according to the method, the deactivation time is equal to or earlier than the activation time.

[0386] In one example, according to the method, the cell identifier of the second cell is different from the cell identifier of the first cell.

[0387] In one example, according to the method, the second cell is served by the mobile base station relay.

[0388] In one example, according to the method, the cell identity change information is included in one or more system information blocks (SIBs).

[0389] In one example, according to the method, the second cell information includes an operating frequency of the second cell. <Cross Reference>

[0390] This non-provisional application claims priority under 35 U.S.C. 119 to provisional application No. 63 / 376,376 filed on September 20, 2022, the entire contents of which are hereby incorporated by reference.

Claims

1. A wireless terminal of a cellular telecommunication system, the wireless terminal communicating with a first cell served by a mobile base station relay, the wireless terminal comprising: A receiver circuit is configured to receive cell identity change information from the first cell, the cell identity change information comprising: Second cell information, the second cell information including a cell identifier of the second cell; and an activation time, after which the second cell may be measured; A processor circuit is configured to perform a cell reselection process based on the cell identity change information to reselect the second cell at or after the activation time. 2 . The wireless terminal according to claim 1 , wherein the cell identity change information further includes a deactivation time, at which the first cell will be deactivated. The wireless terminal according to claim 2 , wherein the deactivation time is equal to or earlier than the activation time.

4. The wireless terminal of claim 2, wherein after the deactivation time, the processor circuit is further configured to stop evaluating the first cell.

5. The wireless terminal of claim 1, wherein the second cell is served by the mobile base station relay.

6. The wireless terminal of claim 1, wherein the cell identity change information is included in one or more system information blocks (SIBs).

7. The wireless terminal of claim 1, wherein prior to the activation time, the processor circuit is further configured to refrain from performing measurements using the second cell information. The wireless terminal according to claim 1 , wherein the second cell information includes an operating frequency of the second cell.

9. A mobile base station repeater of a cellular telecommunication system, the mobile base station repeater serving a wireless terminal via a first cell, the mobile base station repeater comprising: a processor circuit configured to generate cell identity change information, the cell identity change information comprising: second cell information, the second cell information comprising a cell identity of a second cell; and an activation time after which the second cell can be measured; a transmitter circuit configured to transmit the cell identity change information to the wireless terminal, and wherein the cell identity change information is configured for use by the wireless terminal to perform a cell reselection process to reselect the second cell at or after the activation time.

10. The mobile base station relay according to claim 9, wherein the cell identity change information further comprises a deactivation time, and the first cell will be deactivated at the deactivation time.

11. The mobile base station repeater of claim 10, wherein the deactivation time is equal to or earlier than the activation time.

12. The mobile base station repeater of claim 9, wherein the second cell is served by the mobile base station repeater.

13. The mobile base station relay of claim 9, wherein the cell identity change information is included in one or more system information blocks (SIBs).

14. The mobile base station repeater of claim 9, wherein the second cell information includes an operating frequency of the second cell.

15. A method for a wireless terminal of a cellular telecommunication system, the wireless terminal communicating with a first cell served by a mobile base station repeater, the method comprising: Receiving cell identity change information from the first cell, the cell identity change information comprising: second cell information, the second cell information comprising a cell identity of the second cell; and an activation time, after which the second cell can be measured; and performing a cell reselection process based on the cell identity change information to reselect the second cell at or after the activation time.

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