Method for detecting and prioritizing closed access group mobile IAB cells

Abstract

In accordance with an example embodiment of the present invention there is at least one method and an apparatus for performing: determining, by an apparatus, information of a list of ranges in a communications network in which at least one closed access group cell is likely to be found and in which at least one mobile integrated access and backhaul cell is likely to be found; scanning the synchronization signal block to find a physical cell identifier of the candidate cell, the physical cell identifier being found in both at least one system information block closed access group list or range and at least one system information block mobile integrated access and backhaul list or range; based on the scanning, decoding system information at the candidate cell to verify that the candidate cell is a mobile integrated access and backhaul cell and a closed access group cell; and based on the decoding, enabling the apparatus to access a candidate cell for cell reselection.

Description

Technical Field

[0001] Teachings according to example embodiments of the present invention generally relate to reducing the set of cells on which a UE searches, and more specifically to reducing the set of cells on which a UE searches for mobile IAB and CAG cells for improved cell reselection prioritization. Background Art

[0002] This section is intended to provide a background or context to the invention set forth in the claims. The description herein may include concepts that may be pursued, but not necessarily concepts previously conceived or pursued. Therefore, unless otherwise indicated herein, what is described in this section is not prior art to the description and claims in this application and is not admitted to be prior art by virtue of inclusion in this section.

[0003] Certain abbreviations that may appear in the specification and / or drawings are defined as follows:

[0004] AS: Access layer

[0005] CAG: Closed Access Group

[0006] IAB: Integrated Access and Postbacks

[0007] MBSR: Mobile Base Station Relay

[0008] NAS: Non-Access Stratum

[0009] PLMN: Public Land Mobile Network

[0010] PNI-NPN: Public Network Integrated Non-Public Network

[0011] PCI: Physical Cell Identifier

[0012] SIB: System Information Block

[0013] SSB: Synchronization Signal Block

[0014] UE: User Equipment

[0015] VMR: Vehicle-mounted relay

[0016] 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 restrictive regulations. In the same urban environment, combined with a high density of users, one can also expect the presence and availability of many vehicles around, such as for public / private passenger transportation, goods delivery, food trucks, etc., which often travel at low / walking speeds (or temporarily stationary).

[0017] These vehicles do provide a convenient and efficient place to install a vehicle-mounted base station (or base station element) as a relay for providing 5G coverage and connectivity to neighboring UEs outside the vehicle. The relay will use a 5G wireless backhaul towards a macro network (fixed donor base station) connected to the 5G core. In other scenarios, for example, during outdoor sports games or pedestrian events, a vehicle equipped with a relay can conveniently move with users or devices outside the vehicle and provide services to them. In some cases, such as in medical emergencies or when an area lacks adequate coverage, vehicle relays can enable improved connectivity and data delivery.

[0018] At the time of this application, the corresponding architecture enhancement research (FS_VMR) is mainly focused on the following areas:

[0019] - Provisioning, policies and mechanisms for, for example, managing relay configuration, geographic restrictions, QoS, authorizing and controlling UE access via mobile base station relays, etc.;

[0020] - Support roaming of mobile base station relays (including roaming of MT and DU components) to support regulatory requirements (e.g., emergency, priority services, public safety), and

[0021] Supports location services for UE accessing mobile base station relays.

[0022] Example embodiments of the present invention propose improved operations to enhance control of UE access to mobile base station relays, including the use of closed access group (CAG) cells and / or CAG-like enhancement mechanisms. Summary of the invention

[0023] This section includes examples of possible implementations and is not meant to be limiting.

[0024] In another exemplary aspect of the present invention, there is a device, such as a user equipment side device, comprising: at least one processor; and at least one non-volatile memory storing instructions, which instructions, when executed by the at least one processor, cause the device to at least: determine, by the device, information of a range list in a communication network, in which at least one closed access group cell may be found and in which at least one mobile integrated access and backhaul cell may be found; scan synchronization signal blocks to find a physical cell identifier of a candidate cell, which physical cell identifier is found in at least one system information block closed access group list or range, and at least one system information block mobile integrated access and backhaul list or range; based on the scanning, decode the system information at the candidate cell to verify that the candidate cell is a mobile integrated access and backhaul cell and a closed access group cell; and based on the decoding, enable the device to access the candidate cell for cell reselection.

[0025] In another exemplary aspect of the present invention, a method is provided, the method comprising: determining, by a device, information of a range list in a communication network, in which at least one closed access group cell may be found, and in which at least one mobile integrated access and backhaul cell may be found; scanning synchronization signal blocks to find a physical cell identifier of a candidate cell, which physical cell identifier is found in both at least one system information block closed access group list or range, and at least one system information block mobile integrated access and backhaul list or range; and based on the scanning, decoding the system information at the candidate cell to verify that the candidate cell is a mobile integrated access and backhaul cell and a closed access group cell; and based on the decoding, enabling the device to access the candidate cell for cell reselection.

[0026] Another example embodiment is an apparatus and method comprising the apparatus and method of the preceding paragraphs, wherein the determining is based on: a broadcast of information in at least one system information block of a cell from a communication network, wherein the scanning comprises: scanning synchronization signal blocks to find a physical cell identifier of a candidate cell that is found in at least one system information block neighbor cell list or range in the intersection of set C3 or set C4 and set M3 or set M4. Wherein based on a list or range of adjacent physical cell identifiers between frequencies: C4 represents a list, range, or range list of adjacent closed access group cells between frequencies; and M4 represents a list, range, or range list of adjacent mobile integrated access and backhaul cells between frequencies, wherein scanning is performed for physical cell identifiers in the intersection of C4 and M4, wherein based on a list or range of adjacent physical cell identifiers within a frequency: C3 represents a list, range, or range list of adjacent closed access group cells within a frequency; and M3 represents a list, range, or range list of adjacent mobile integrated access and backhaul cells within a frequency, wherein scanning is performed for physical cell identifiers in the intersection of C3 and M3, wherein the device is configured by a communication network with one or A plurality of closed access group identifiers, wherein based on the scanning, a cell of the communication network is determined as a candidate cell having system information to be decoded, wherein based on the determination, at least one system information block is received from the cell of the communication network, the at least one system information block indicating that the cell is a closed access group cell and a mobile integrated access and backhaul cell, wherein based on the reception, system information block 1 is decoded; the cell of the communication network is detected as a closed access group cell and a mobile integrated access and backhaul in a range list in the communication network; it is verified that the closed access group identifier of the detected cell is in a configuration set of the closed access group list or range of the device; and based on the verification, the cell of the communication network is reselected, wherein the reselection does not take into account the dedicated frequency priority of the cell.

[0027] A non-transitory computer readable medium storing program code, the program code being executed by at least one processor to perform at least the method described in the preceding paragraphs.

[0028] In another exemplary aspect of the present invention, there is a device comprising: a component for determining, by the device, information of a range list in a communication network, in which at least one closed access group cell may be found, and in which at least one mobile integrated access and backhaul cell may be found; a component for scanning synchronization signal blocks to find a physical cell identifier of a candidate cell, which physical cell identifier is found in both at least one system information block closed access group list or range and at least one system information block mobile integrated access and backhaul list or range; a component for decoding system information at the candidate cell based on the scanning to verify that the candidate cell is a mobile integrated access and backhaul cell and a closed access group cell; and a component for enabling the device to access the candidate cell for cell reselection based on the decoding.

[0029] According to the example embodiments described in the above paragraphs, at least means for determining, scanning and decoding include a network interface and a computer program code stored on a computer readable medium and executed by at least one processor.

[0030] A communication system includes the above-mentioned device as a network-side device or a user equipment-side device for performing the above-mentioned operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and other aspects, features and benefits of various embodiments of the present disclosure will become more apparent through the following detailed description with reference to the accompanying drawings, in which the same reference numerals are used to represent the same or equivalent elements. The accompanying drawings are illustrated to facilitate a better understanding of the embodiments of the present disclosure, and the drawings are not necessarily drawn to scale. In the drawings:

[0032] Figure 1 Detection and prioritization of mobile IAB+CAG cells using SIB4 assistance information according to an example embodiment of the present invention is shown;

[0033] Figure 2 Detection and prioritization of mobile IAB+CAG cells using SIB3 assistance information according to an example embodiment of the present invention is shown;

[0034] Figure 3 shows high-level block diagrams of various devices used to perform various aspects of the present invention; and

[0035] Figure 4 A method according to an exemplary embodiment of the present invention is shown, which may be performed by an apparatus. DETAILED DESCRIPTION

[0036] In exemplary embodiments of the present invention, at least a method and apparatus for reducing a set of cells on which a UE searches for mobile IAB and CAG cells for cell reselection prioritization is proposed.

[0037] Mobile IAB (Integrated Access and Backhaul), MBSR (Mobile Base Station Relay), VMR (Vehicle-Mounted Relay), Closed Access Group (CAG)

[0038] Example embodiments of the present invention relate to standards-based mobile integrated access and backhaul (Mobile IAB) including vehicle mounted relay (VMR), also known as mobile base station relay (MBSR).

[0039] Here is some relevant background on VMR and / or mobile IAB standards:

[0040] Enhanced mobility of IAB nodes and served UEs, including aspects related to group mobility. No optimization for surrounding UEs. [RAN3, RAN2].

[0041] Background of the Closed Access Group (CAG) concept:

[0042] A public network integrated NPN is an NPN [non-public network] available via a PLMN, for example, by means of a dedicated DNN, or through one (or more) network slice instances allocated for the NPN. Currently, the existing network slicing functionality applies. When a PNI-NPN is available via a PLMN, the UE shall subscribe to the PLMN to facilitate access to the PNI-NPN.

[0043] Note that since network slicing cannot prevent the possibility of a UE attempting to access the network in an area where the UE is not allowed to use the network slice allocated for the NPN, access control can optionally be applied using closed access groups.

[0044] The closed access group identifies a group of users that are allowed to access one or more CAG cells associated with the CAG.

[0045] CAG is used for PNI-NPN to prevent UE(s) that are not allowed to access the NPN via the associated cell(s) from automatically selecting and accessing the associated CAG cell(s).

[0046] According to the standards at the time of this application, the following markings are required:

[0047] - The CAG is identified by a CAG identifier that is unique within the scope of the PLMN ID; and

[0048] - A CAG cell broadcasts one or more CAG identifiers for each PLMN.

[0049] For more background on CAG, see TS 23.501 section 5.30.3. Details related to UE reselection to CAG cells are specified in TS 38.304, and the related access stratum (AS) CAG indication from the network to the UE is specified in TS 38.331.

[0050] In the standards at the time of this application, it has been agreed to use CAG as a method for controlling UE access to MBSR.

[0051] Currently, the CAG identifier is used to control UE access via MBSR (i.e., mobile IAB node), and the existing CAG mechanism can be used to manage UE access to MBSR, but the following additional considerations are required:

[0052] When the MBSR is allowed to operate as an IAB node of a PLMN, the MBSR is configured with a CAG identifier that is unique within the PLMN during communication with the serving PLMN OAM or during a (pre) configuration mechanism. If the MBSR is (pre) configured with a list of PLMNs in which the MBSR is allowed to operate as an MBSR, the corresponding CAG identifier of each PLMN is also configured in the MBSR.

[0053] Note that the CAG of MBSR is part of the PNI-NPN concept.

[0054] NG-RAN and 5GC support UE access control based on the CAG identifier associated with the MBSR cell and the allowed CAG identifiers of UEs supporting the CAG function.

[0055] For cell reselection to a CAG cell, the standard provisions of the present invention are as follows:

[0056] In addition to normal cell reselection, the UE may optionally use the autonomous search function to detect CAG cells on both serving and non-serving frequencies. However, the UE shall follow the cell reselection criteria based on dedicated frequency priority and shall follow the autonomous cell search result only if the result also meets the existing cell reselection criteria based on dedicated frequency priority.

[0057] Furthermore, the standard at the time of the invention states that a cell may broadcast a list of neighboring intra-frequency / inter-frequency PCIs where CAG cells may be found in SIB3 and SIB4, respectively.

[0058] Meanwhile, the UE's reselection behavior towards a mobile IAB cell has been discussed according to the standards at the time of the present invention, and it has been agreed that the UE can increase the priority of inter-frequency reselection towards a mobile IAB cell (i.e., independent of the dedicated frequency priority of the mobile IAB cell). Under the same agenda item, RAN2 has discussed whether to add new auxiliary information to the SIB4 message to indicate the neighboring frequencies and / or neighboring cells where the mobile IAB cell can be found to assist the UE in searching for a mobile IAB cell for cell reselection. RAN2 has also discussed the issue of adding a "Mobile IAB Indication" to the SIB1 message to let the UE know that the cell is a "mobile" IAB cell.

[0059] Since the standard requires the UE to reselect CAG cells to follow the dedicated frequency priority, it is observed that there may be contradictions / ambiguities if RAN2 agrees to allow the UE to increase the priority of mobile IAB cells for cell reselection, and these mobile IAB cells are also configured as CAG cells.

[0060] As initially observed, if a mobile IAB cell is configured as a CAG cell, it is unclear whether the requirement in the standard regarding dedicated frequency priority for CAG cells still applies if the UE is also allowed to provide priority for the mobile IAB cell.

[0061] If the UE is expected to respect the dedicated frequency priority when the mobile IAB cell is configured as a CAG cell, this may conflict with the original intended result of allowing the UE to increase the priority of the mobile IAB cell in the first case, for example, when a restricted class of UEs intends to operate on the mobile IAB node, such as in public safety applications, urban air traffic, etc., especially in cases where the dedicated frequency priority of the mobile IAB CAG cell may be lower (for example, to minimize access from UEs that do not have CAG capabilities).

[0062] On the other hand, if the UE is simply allowed to ignore the dedicated frequency priority when the mobile IAB node is configured as a CAG cell, this may cause UEs that wish to increase the priority of the mobile IAB CAG cell to continuously search and decode the system information of neighboring cells until they find a cell that meets the mobile IAB+CAG conditions, which may unnecessarily consume a lot of power of the UE.

[0063] Therefore, it would be beneficial if a UE that wishes to increase the priority of a mobile IAB+CAG cell for reselection could search on a reduced set of candidate cells, ie, only decode system information of cells that may be mobile IAB+CAG.

[0064] Example embodiments of the present invention at least provide a method for reducing a set of cells on which a UE searches for a mobile IAB+CAG cell for cell reselection prioritization.

[0065] Before describing in detail the exemplary embodiments disclosed herein, please refer to Figure 3 , Figure 3 Illustrated are simplified block diagrams of various electronic devices that are suitable for practicing the example embodiments of this invention.

[0066] Figure 3 A block diagram of one possible and non-limiting exemplary system in which example embodiments may be practiced is shown. Figure 3 In the embodiment, user equipment (UE) 10 performs wireless communication with a wireless network 1 or a network 1, such as Figure 3 As shown. Figure 3 The wireless network 1 or network 1 shown may include a communication network, such as a mobile network, for example the mobile network 1 or the first mobile network disclosed herein. Figure 3 Any reference to wireless network 1 in the specification may be considered a reference to any wireless network disclosed herein. Figure 3 The wireless network 1 shown may also include hard-wired functions that may be required by the communication network. UE is a wireless device that can access a wireless network, usually a mobile device. For example, UE can be a mobile phone (or "cell" phone) and / or a computer with mobile terminal functions. For example, UE or mobile terminal can also be a portable, pocket, handheld, computer embedded or vehicle-mounted mobile device, and performs voice signaling and / or data exchange with RAN.

[0067] UE 10 comprises one or more processors DP 10A, one or more memories MEM 10B and one or more transceivers TRANS 10D interconnected by one or more buses. Each transceiver in the one or more transceivers TRANS10D comprises a receiver and a transmitter. The one or more buses may be address, data or control buses and may comprise any interconnection mechanism, such as a series of lines on a motherboard or integrated circuit, optical fiber or other optical communication devices, etc. The one or more transceivers TRANS10D may optionally be connected to one or more antennas for communication with NN 12. The one or more memories MEM 10B comprise computer program code PROG 10C. UE 10 communicates with NN 12 via wireless link 11 or 16.

[0068] NN 12 (NR / 5G Node B, Evolved NB or LTE equipment) is connected to the Figure 3A network node, such as a primary or secondary node base station (e.g., for NR or LTE long term evolution), with which a wireless device such as a UE 10 communicates. The NN 12 provides access to a wireless network 1 to wireless devices such as the UE 10. The NN 12 includes one or more processors DP 12A, one or more memories MEM 12B, and one or more transceivers TRANS12D interconnected by one or more buses. According to an example embodiment, these TRANS12D may include an X2 and / or Xn interface for performing an example embodiment. Each of the one or more transceivers TRANS12D includes a receiver and a transmitter. The one or more transceivers TRANS12D may optionally be connected to one or more antennas for communication with the UE 10 via at least a link 11. The one or more memories MEM 12B and the computer program code PROG 12C are configured to cause the NN 12 to perform one or more of the operations described herein together with the one or more processors DP 12A. The NN 12 may communicate with another gNB or eNB, such as via a link 16. In addition, link 11, link 16 and / or any other link may be wired or wireless or both, and may implement, for example, an X2 or Xn interface. In addition, link 11 and / or link 16 may pass through other network devices, such as but not limited to Figure 3 The NN 12 may include NCE / MME / SGW / UDM / PCF / AMF / SMF 14 devices in the NN. The NN 12 may perform functions of an MME (Mobility Management Entity) or an SGW (Serving Gateway) (such as a user plane function) and / or access management functions of LTE and similar functions of 5G.

[0069] LMF 13 (NR / 5G, Evolved NB or LTE equipment) is a network device such as a device including a location management function device (e.g., for NR or LTE long term evolution) that is used with a network device such as Figure 3The LMF 13 may be associated with a mobility function device such as an AMF or an SMF. In addition, the LMF 13 may also communicate with devices such as the NN 12 and / or the UE 10 and / or the wireless network 1. The LMF 13 includes one or more processors DP 13A, one or more memories MEM 13B, one or more network interfaces and one or more transceivers TRANS13D interconnected by one or more buses. According to an exemplary embodiment, these network interfaces of the LMF 13 may include X2 and / or Xn interfaces for executing the exemplary embodiment. Each of the one or more transceivers TRANS13D includes a receiver and a transmitter, which may be optionally connected to one or more antennas. The one or more memories MEM 13B include a computer program code PROG 13C. For example, the one or more memories MEM 13B and the computer program code PROG 13C are configured to cause the LMF 13 to perform one or more of the operations described herein together with the one or more processors DP 13A. The LMF 13 may communicate with another mobility function device and / or an eNB (eg, NN 12 and UE 10) or any other device or NCE / MME / SGW / UDM / PCF / AMF / SMF 14 using, for example, link 11 or link 16 or another link. Figure 3 The link 16 shown may be used for communication between NN 12 and NN 13. These links may be wired or wireless or both, and may implement, for example, an X2 or Xn interface. In addition, as described above, link 11 and / or link 16 may pass through other network devices, such as but not limited to NCE / MME / SGW devices, such as Figure 3 NCE / MME / SGW / UDM / PCF / AMF / SMF 14.

[0070] Figure 3 The one or more buses of the device may be address, data, or control buses and may include any interconnection mechanism such as a series of wires on a motherboard or integrated circuit, optical fiber or other optical communication device, wireless channel, etc. For example, one or more transceivers TRANS12D, TRANS13D and / or TRANS10D may be implemented as a remote radio head (RRH) where the other elements of the NN 12 are physically located at a different location from the RRH, and the devices may include one or more buses that may be partially implemented as fiber optic cables to connect the other elements of the NN 12 to the RRH.

[0071] Note that although Figure 3A network node such as NN 12 is shown, but the node may incorporate or be incorporated into an eNodeB, eNB, or gNB, such as for LTE and NR, and may still be configured to perform the example embodiments.

[0072] Note also that the description herein indicates that a "cell" performs functions, but it should be clear that the gNB, and / or user equipment, and / or mobility management function device forming the cell will perform these functions. In addition, a cell forms part of a gNB, and each gNB can have multiple cells.

[0073] The wireless network 1 or any network it may represent may or may not include NCE / MME / SGW / UDM / PCF / AMF / SMF 14, which NCE / MME / SGW / UDM / PCF / AMF / SMF 14 may include NCE (network control element function), MME (mobility management entity) / SGW (serving gateway) function, and / or serving gateway (SGW), and / or MME (mobility management entity) and / or SGW (serving gateway) function, and / or user data management function (UDM), and / or PCF (policy control) function, and / or access and mobility management function (AMF) function, and / or session management (SMF) function, and / or location management function (LMF), and / or authentication server (AUSF) function, and provide connection to another network, such as a telephone network and / or a data communication network (e.g., the Internet), and is configured to perform any 5G and / or NR operations as a supplement or alternative to other standard operations at the time of this application. NCE / MME / SGW / UDM / PCF / AMF / SMF 14 may be configured to perform operations according to the example embodiments in LTE, NR, 5G, and / or any standard-based communication technology implemented or discussed at the time of this application. In addition, it is noted that operations according to the example embodiments (such as those performed by NN 12 and / or LMF 13) may also be performed at NCE / MME / SGW / UDM / PCF / AMF / SMF 14.

[0074] The NCE / MME / SGW / UDM / PCF / AMF / SMF 14 includes one or more processors DP 14A, one or more memories MEM 14B, and one or more network interfaces (N / WI / F) interconnected by one or more buses coupled to the link 13 and / or the link 16. According to an exemplary embodiment, these network interfaces may include X2 and / or Xn interfaces for performing the exemplary embodiment. The one or more memories MEM 14B include computer program code PROG 14C. The one or more memories MEM 14B and the computer program code PROG 14C are configured to cause the NCE / MME / SGW / UDM / PCF / AMF / SMF 14 to perform one or more operations together with the one or more processors DP 14A, which may be required to support the operation according to the exemplary embodiment.

[0075] Note that the NN 12 and / or LMF 13 and / or UE 10 may be configured (e.g., based on standard implementations, etc.) to perform location management function (LMF) functions. The LMF functions may be implemented in any of these network devices or other devices associated with these devices. In addition, the functions of the LMF (such as LMF 13) may be co-located with the UE 10 to communicate with the LMF 13. Figure 3 The NN 12 and / or LMF 13 are separated to perform operations according to the example embodiments disclosed herein.

[0076] The wireless network 1 can implement network virtualization, which is a process of combining hardware and software network resources and network functions into a single software-based management entity (i.e., a virtual network). Network virtualization involves platform virtualization (which is usually combined with resource virtualization). Network virtualization is divided into two categories: one is external, which combines many networks or network parts into virtual units; the other is internal, which provides network-like functions for software containers on a single system. Note that the virtualized entities generated by network virtualization are still implemented to some extent using hardware such as processors DP10, DP12A, DP13A and / or DP14A and memories MEM 10B, MEM 12B, MEM 13B and / or MEM 14B, and such virtualized entities also produce technical effects.

[0077] The computer-readable memories MEM 12B, MEM 13B, and MEM 14B may be of any type suitable for the local technical environment and may be implemented using any suitable data storage technology, such as semiconductor-based memory devices, flash memory, magnetic memory devices and systems, optical memory devices and systems, fixed memory, and removable memory. The computer-readable memories MEM 12B, MEM 13B, and MEM 14B may be components for performing storage functions. The processors DP10, DP12A, DP13A, and DP14A may be of any type suitable for the local technical environment and, as non-limiting examples, may include one or more of a general-purpose computer, a special-purpose computer, a microprocessor, a digital signal processor (DSP), and a processor based on a multi-core processor architecture. The processors DP10, DP12A, DP13A, and DP14A may be components for performing functions, such as controlling UE 10, NN 12, LMF 13, and other functions described herein.

[0078] In general, various embodiments of any of these devices may include, but are not limited to, a cellular telephone (such as a smart phone), a tablet computer, a personal digital assistant (PDA) with wireless communication capabilities, a portable computer with wireless communication capabilities, an image capture device with wireless communication capabilities (such as a digital camera), a gaming device with wireless communication capabilities, a music storage and playback device with wireless communication capabilities, an Internet device allowing wireless Internet access and browsing, a tablet computer with radio communication capabilities, and a portable unit or terminal incorporating a combination of such functionality.

[0079] In addition, various embodiments of any of these devices may be used with a UE vehicle, an aerial platform station, or any other such type of node associated with a ground network or any drone type radio or radio in an aircraft or other airborne vehicle or water-borne vessel (such as a ship).

[0080] As described above, exemplary embodiments of the present invention at least provide a method for reducing a set of cells on which a UE searches for a mobile IAB+CAG cell for cell reselection prioritization. Some notable features are underlined below. Levy .

[0081] Assuming that the UE has been configured by NAS with a set of one or more CAG identifiers, this enables the UE to access a CAG cell.

[0082] The cell broadcasts in SIB4 a list of inter-frequency adjacent PCI ranges where CAG cells can be found. The community is The SIB4 additionally broadcasts a list, or range, or range of inter-frequency neighboring PCIs where the mobile IAB cell can be found. List .

[0083] The cell broadcasts in SIB3 a list of intra-frequency neighboring PCI ranges where CAG cells can be found. The community is The SIB3 additionally broadcasts a list, or range, or range of intra-frequency neighboring PCIs where the mobile IAB cell can be found. List .

[0084] UE scans SSBs for SIBs found in both SIB4 CAG list / range and SIB4 Mobile IAB list / range Candidate cell PCI, or UE scans SSB to find both SIB3 CAG list / range and SIB3 mobile IAB list / range The UE decodes the system information at the candidate cell(s) to verify that the cell is a mobile IAB cell and CAG cell. UE verifies the CAG of the cell Logo In the set of CAG identifiers configured at the UE by the NAS to which the UE is allowed to access. The UE may increase the priority of candidate cells that meet such cell reselection criteria, ignoring the dedicated intra-frequency or inter-frequency priority class .

[0085] In one possible deployment scenario, UE's access to a mobile cell may be restricted by the CAG allowing only subscription to that specific cell. This also applies to neighboring cells, which may be both mobile cells and CAG cells that the UE should increase reselection. In this case, the cells in which the SI will be decoded are the mAB and CAG cells. .

[0086] Figure 1 Detection and prioritization of mobile IAB+CAG cells using SIB4 assistance information according to an example embodiment of the present invention is shown.

[0087] Figure 1 UE (such as Figure 3 UE10 in cell A and cell B (such as Figure 3 NN12 and / or NN13) Communication between. Figure 1 The steps according to an exemplary embodiment of the present invention are shown in IAB+CAG priority for cell reselection enables UEs to more efficiently search for those cells at inter-frequency neighbors (based on SIB4 auxiliary information) .

[0088] Figure 2 Detection and prioritization of mobile IAB+CAG cells using SIB3 assistance information according to an example embodiment of the present invention is shown.

[0089] Figure 2 Also shown is a UE (such as Figure 3 UE 10 in cell A and cell C (such as Figure 3 NN12 and / or NN13) for communication. Figure 2 The steps of an exemplary embodiment according to the present invention are shown, which are related to making it desirable to optimize The UE that first considers mobile IAB+CAG for cell reselection can more efficiently search for cells in the adjacent frequency (base (in SIB3 auxiliary information) .

[0090] Note that according to an exemplary embodiment of the present invention, The deployment does not rely on broadcasting SIB4 and SIB3 information. Example embodiments may be used with Figure 1 and / or Figure 2 Either or both scenarios work together .

[0091] Note that Figure 1 and Figure 2 In the context of , the term "set" refers to a list, a range, or a list of ranges.

[0092] like Figure 1 As shown in step 1 of , the UE is configured with one or more closed access group (CAG) identifiers by the non-access stratum (NAS). Figure 1 As shown in step 2 of , the UE receives a system information block 4 (SIB4) indicating an inter-frequency adjacent CAG PCI (set C4) and an inter-frequency adjacent mobile integrated access and backhaul (IAB) physical cell identifier (PCI) (set M4) from cell A. Figure 1As shown in step 3 of , the UE scans the synchronization signal block (SSB) to find the PCI in the intersection of set C4 and set M4. Figure 1 As shown in step 4 of , the UE receives at least one SSB having a PCI in set C4 and set M4 from cell B. Figure 1 As shown in step 5 of , the UE determines cell B as a candidate cell having system information to be decoded. Figure 1 As shown in step 6 of , the UE receives a system information block 1 (SIB1) from cell B, where SIB1 indicates that cell B is a closed access group (CAG) cell and a mobile integrated access and backhaul (IAB) cell. Then, as Figure 1 As shown in step 7, the UE decodes SIB1 and detects cell B as a mobile IAB and CAG cell in the UE CAG list; reselects cell B and ignores the dedicated frequency priority of the cell.

[0093] like Figure 2 As shown in step 1 of , the UE is configured with one or more closed access group (CAG) identifiers by the non-access stratum (NAS). Figure 2 As shown in step 2, the UE receives system information block 3 (SIB3) from cell A, where SIB3 indicates the intra-frequency adjacent CAG PCI (set C3) and the intra-frequency adjacent mobile integrated access and backhaul (IAB) physical cell identifier (PCI) (set M3). Figure 2 As shown in step 3 of , the UE scans the synchronization signal block (SSB) to find the PCI in the intersection of set C3 and set M3. Figure 2 As shown in step 4 of , the UE receives at least one SSB having a PCI in set C3 and set M3 from cell B. Figure 2 As shown in step 5 of , the UE determines cell B as a candidate cell having system information to be decoded. Figure 2 As shown in step 6 of , the UE receives a system information block 1 (SIB1) from cell B, where SIB1 indicates that cell B is a closed access group (CAG) cell and a mobile integrated access and backhaul (IAB) cell. Then, as Figure 2 As shown in step 7, the UE decodes SIB1 and detects cell C as a mobile IAB and CAG cell in the UE CAG list; reselects cell B and ignores the dedicated frequency priority of the cell.

[0094] According to an exemplary embodiment of the present invention, any one of cell A, cell B and / or cell C may be both or one of a closed access group (CAG) cell and / or a mobile integrated access and backhaul (IAB) cell. In addition, according to an exemplary embodiment of the present invention, cell A, cell B and / or cell C may not be a closed access group (CAG) cell and / or a mobile integrated access and backhaul (IAB) cell.

[0095] Figure 4 A method according to an exemplary embodiment of the present invention is shown, which may be performed by an apparatus.

[0096] Figure 4 The diagram shows that the network device (e.g., Figure 3 Operations performed by devices such as UE 10 in FIG. Figure 4 As shown in block 410 of , the device determines information of a list of ranges in the communication network, in which at least one closed access group cell may be found, and in which at least one mobile integrated access and backhaul cell may be found. Figure 4 As shown in block 420 of , the synchronization signal blocks are scanned to find a physical cell identifier of a candidate cell, which physical cell identifier is found in both at least one system information block closed access group list or range and at least one system information block mobile integrated access and backhaul list or range. Figure 4 As shown in block 430 of , based on the scan, the system information at the candidate cell is decoded to verify that the candidate cell is a mobile integrated access and backhaul cell and a closed access group cell. Figure 4 As shown in block 440 of , based on the decoding, the apparatus is enabled to access a candidate cell for cell reselection.

[0097] According to the example embodiments described in the above paragraphs, wherein the determination is based on information in at least one system information block of a cell from the communication network is broadcast.

[0098] According to the example embodiment described in the above paragraph, the scanning includes: scanning the synchronization signal block to find the physical cell identifier of the candidate cell, which is found in at least one system information block neighbor cell list or range in the intersection of set C3 or set C4 and set M3 or set M4.

[0099] According to the example embodiment described in the above paragraphs, based on a list or range of inter-frequency adjacent physical cell identifiers: C4 represents a list, range, or range list of inter-frequency adjacent closed access group cells; and M4 represents a list, range, or range list of inter-frequency adjacent mobile integrated access and backhaul cells, wherein scanning is performed for physical cell identifiers in the intersection of C4 and M4.

[0100] According to the example embodiment described in the above paragraphs, based on a list or range of adjacent physical cell identifiers within a frequency: C3 represents a list, range, or range list of adjacent closed access group cells within a frequency; and M3 represents a list, range, or range list of adjacent mobile integrated access and backhaul cells within a frequency, wherein scanning is performed for physical cell identifiers in the intersection of C3 and M3.

[0101] According to the example embodiments described in the above paragraphs, the apparatus is configured with one or more closed access group identifiers by the communication network.

[0102] According to the example embodiments described in the above paragraphs, based on the scanning, a cell of the communication network is determined as a candidate cell having system information to be decoded.

[0103] According to the example embodiments described in the above paragraphs, based on the determination, at least one system information block is received from a cell of the communication network, the at least one system information block indicating that the cell is a closed access group cell and a mobile integrated access and backhaul cell.

[0104] According to the example embodiment described in the above paragraphs, based on the reception: decoding system information block 1; detecting a cell of the communication network as a closed access group cell and a mobile integrated access and backhaul cell in a range list in the communication network; verifying that the closed access group identifier of the detected cell is in a configuration set of the closed access group list or range of the device; and based on the verification, reselecting the cell of the communication network, wherein the reselection does not take into account the dedicated frequency priority of the cell.

[0105] A non-transitory computer readable medium (such as Figure 3 MEM 10B) stores program code (such as Figure 3 PROG 10C shown), the program code is executed by at least one processor (such as Figure 3 The DP 10A) shown is executed to perform at least the operations described in the above paragraphs.

[0106] According to an exemplary embodiment of the present invention as described above, there is an apparatus comprising: a device (such as Figure 3 UE 10 in Figure 3 a component for providing information of a list of ranges in a communication network in which at least one closed access group cell may be found and at least one mobile integrated access and backhaul cell may be found; and for scanning (e.g., Figure 3 One or more transceivers 10D, MEM 10B, PROG 10C and DP 10A in the system information block to find the physical cell identifier of the candidate cell found in at least one system information block closed access group list or range, and at least one system information block mobile integrated access and backhaul list or range; and a component for decoding (such as) based on the scanning Figure 3One or more transceivers 10D in; MEM 10B; PROG 10C; and DP 10A) system information at the candidate cell to verify that the candidate cell is a component of a mobile integrated access and backhaul cell and a closed access group cell; and a component for enabling the device to access the candidate cell for cell reselection based on the decoding.

[0107] In an exemplary aspect of the invention according to the above paragraphs, wherein at least the means for determining, scanning and decoding comprises a non-transitory computer readable medium [such as Figure 3 MEM 10B], the medium is used by at least one processor [such as Figure 3 DP10A] executable computer program [such as Figure 3 PROG 10C] coding in.

[0108] In addition, according to an exemplary embodiment of the present invention, there is a circuit system for performing operations according to the exemplary embodiment of the present invention disclosed herein. The circuit system may include any type of circuit system, including content encoding circuit system, content decoding circuit system, processing circuit system, image generation circuit system, data analysis circuit system, etc. In addition, the circuit system may include a discrete circuit system, an application-specific integrated circuit system (ASIC) and / or a field programmable gate array circuit system (FPGA), etc., and a processor specially configured by software to perform corresponding functions, or a dual-core processor with software and a corresponding digital signal processor, etc. In addition, the necessary inputs and outputs of the circuit system, the functions performed by the circuit system, and the interconnection of the circuit system with other components that may include other circuit systems (possibly via inputs and outputs) are provided to perform the exemplary embodiments of the present invention described herein.

[0109] According to an exemplary embodiment of the present invention disclosed in this application, the provided “circuitry system” may include at least one or more or all of the following:

[0110] (a) Hardware circuit implementation only (such as implementation in analog and / or digital circuit systems only)

[0111] now);

[0112] (b) a combination of hardware circuitry and software such as (where applicable):

[0113] (i) a combination of analog and / or digital hardware circuits and software / firmware; and

[0114] (ii) any portion of a hardware processor(s) with software, including digital signal processor(s), software and memory(s) that work together to cause a device such as a mobile phone or server to perform various functions, such as those described herein

[0115] The functions or operations of the example embodiments of the present invention disclosed in; and

[0116] (c) Hardware circuit(s) and / or processor(s), such as microprocessor(s) or portion(s) of microprocessor(s), that require software (e.g., firmware) to operate, but where the software may not be present, for operation.

[0117] According to an exemplary embodiment of the present invention, there is sufficient circuitry to perform at least the novel operations disclosed in this application according to the exemplary embodiment of the present invention, and "circuitry" as used herein refers to at least the following:

[0118] (a) Hardware circuit implementation only (such as implementation only in analog and / or digital circuit systems)

[0119] now); and

[0120] (b) a combination of circuitry and software (and / or firmware) such as (where applicable):

[0121] (i) a combination of processors, or

[0122] (ii) Processor / software components, including digital signal processor(s), software and memory(s), which work together to cause a mobile phone, for example

[0123] Devices such as telephones or servers perform various functions; and

[0124] (c) Circuitry, such as microprocessor(s) or portion(s) of microprocessor(s), that requires software or firmware to operate, even if the software or firmware is not physically present.

[0125] This definition of “circuitry” applies to all uses of this term in this application, including in any claims. As another example, as used in this application, the term “circuitry” would also cover an implementation of merely a processor (or multiple processors) or portion of a processor and its accompanying software and / or firmware. For example, the term “circuitry” would also cover a baseband integrated circuit or application processor integrated circuit for a mobile phone, or a similar integrated circuit in a server, cellular network device, or other network device, if applicable to the particular claim element.

[0126] In general, various embodiments may be implemented in hardware or dedicated circuits, software, logic, or any combination thereof. For example, some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software, which may be executed by a controller, microprocessor, or other computing device, but the invention is not limited thereto. Although various aspects of the invention may be illustrated and described with block diagrams, flow charts, or using some other graphical representation, it is well understood that, as non-limiting examples, the blocks, devices, systems, techniques, or methods described herein may be implemented in hardware, software, firmware, dedicated circuits or logic, general purpose hardware or controllers or other computing devices, or some combination thereof.

[0127] Embodiments of the present invention may be implemented in various components such as integrated circuit modules. The design of integrated circuits is generally a highly automated process. Complex and powerful software tools are available to convert logic level designs into semiconductor circuit designs for etching and formation on semiconductor substrates.

[0128] The word "exemplary" as used herein means "serving as an example, instance, or illustration". Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred over other embodiments. All embodiments described in this detailed description are exemplary embodiments intended to enable those skilled in the art to make or use the invention, rather than to limit the scope of the invention which is defined by the claims.

[0129] The above description provides a complete and informative description of the best method and apparatus presently contemplated by the inventors for carrying out the present invention by way of exemplary and non-limiting examples. However, various modifications and adaptations may be apparent to those skilled in the relevant art in view of the above description when read in conjunction with the accompanying drawings and the appended claims. However, all such and similar modifications of the teachings of the exemplary embodiments of the present invention will still fall within the scope of the present invention.

[0130] It should be noted that the terms "connected," "coupled," or any variations thereof, refer to any direct or indirect connection or coupling between two or more elements, and may encompass the presence of one or more intermediate elements between two elements that are "connected" or "coupled" together. The coupling or connection between elements may be physical, logical, or a combination thereof. As used herein, as several non-limiting and non-exhaustive examples, two elements may be considered to be "connected" or "coupled" together by using one or more wires, cables, and / or printed electrical connections, as well as by using electromagnetic energy, such as electromagnetic energy having wavelengths in the radio frequency region, microwave region, and optical (both visible and invisible) region.

[0131] Furthermore, some of the features of the preferred embodiments of the present invention may be used to advantage without the corresponding use of other features.Thus, the above description should be regarded as merely illustrative of the principles of the present invention, and not in limitation thereof.

Claims

1. A device for communication, comprising: at least one processor; as well as at least one non-transitory memory storing instructions that, when executed by the at least one processor, cause the apparatus to at least: determining information of a list of ranges in a communications network in which at least one closed access group cell may be found and in which at least one mobile integrated access and backhaul cell may be found; scanning synchronization signal blocks for a physical cell identifier of a candidate cell, the physical cell identifier being found in both at least one system information block closed access group list or range, and at least one system information block mobile integrated access and backhaul list or range; Based on the scanning, decoding system information at the candidate cell to verify that the candidate cell is a mobile integrated access and backhaul cell and a closed access group cell; as well as Based on the decoding, the device is enabled to access the candidate cell for cell reselection.

2. The apparatus of claim 1, wherein the determination is based on a broadcast of the information in at least one system information block from a cell of the communication network.

3. The apparatus of claim 1, wherein the scanning comprises: The synchronization signal blocks are scanned for a physical cell identifier of the candidate cell that is found in both at least one system information block neighbor cell list or range in the intersection of set C3 or set C4 and set M3 or set M4.

4. The apparatus of claim 3, wherein based on an inter-frequency neighboring physical cell identifier list or range: C4 represents a list, range, or range list of inter-frequency adjacent closed access group cells; and M4 represents a list, range, or range list of inter-frequency adjacent mobile integrated access and backhaul cells, Wherein the scanning is performed for physical cell identifiers in the intersection of C4 and M4.

5. The apparatus of claim 3, wherein based on an intra-frequency neighbor physical cell identifier list or range: C3 represents a list, range, or range list of intra-frequency adjacent closed access group cells; and M3 represents a list, range, or range list of adjacent mobile integrated access and backhaul cells within the frequency. Wherein the scanning is performed for physical cell identifiers in the intersection of C3 and M3.

6. The apparatus of claim 3, wherein the apparatus is configured with the one or more closed access group identifiers by the communications network.

7. The apparatus of claim 1 , wherein the at least one non-transitory memory stores instructions that are executed by the at least one processor to cause the apparatus to at least: Based on the scanning, cells of the communication network are determined as candidate cells having system information to be decoded.

8. The apparatus of claim 7, wherein the at least one non-transitory memory stores instructions that are executable by the at least one processor to cause the apparatus to at least: Based on the determination, at least one system information block is received from a cell of the communication network, the at least one system information block indicating that the cell is a closed access group cell and a mobile integrated access and backhaul cell.

9. The apparatus of claim 8, wherein the at least one non-transitory memory stores instructions that are executed by the at least one processor to cause the apparatus to at least: Based on the received: Decode system information block 1; detecting cells of the communication network as closed access group cells and mobile integrated access and backhaul cells in the list of ranges in the communication network; verifying that the detected closed access group identifier of the cell is in a configuration set of a closed access group list or range of the device; as well as Based on the verification, a cell of the communication network is reselected, wherein the reselection does not take into account a dedicated frequency priority of the cell.

10. A method of communication, comprising: determining, by the apparatus, information of a list of ranges in the communication network in which at least one closed access group cell may be found and in which at least one mobile integrated access and backhaul cell may be found; scanning synchronization signal blocks for a physical cell identifier of a candidate cell, the physical cell identifier being found in both at least one system information block closed access group list or range, and at least one system information block mobile integrated access and backhaul list or range; Based on the scanning, decoding system information at the candidate cell to verify that the candidate cell is a mobile integrated access and backhaul cell and a closed access group cell; as well as Based on the decoding, the device is enabled to access the candidate cell for cell reselection.

11. The method of claim 10, wherein the determination is based on a broadcast of the information in at least one system information block from a cell of the communication network.

12. The method of claim 10, wherein the scanning comprises: The synchronization signal blocks are scanned for a physical cell identifier of the candidate cell that is found in both at least one system information block neighbor cell list or range in the intersection of set C3 or set C4 and set M3 or set M4.

13. The method of claim 12, wherein based on an inter-frequency neighboring physical cell identifier list or range: C4 represents a list, range, or range list of inter-frequency adjacent closed access group cells; and M4 represents a list, range, or range list of inter-frequency adjacent mobile integrated access and backhaul cells, Wherein the scanning is performed for physical cell identifiers in the intersection of C4 and M4.

14. The method of claim 12, wherein based on an intra-frequency neighbor physical cell identifier list or range: C3 represents a list, range, or range list of intra-frequency adjacent closed access group cells; and M3 represents a list, range, or range list of adjacent mobile integrated access and backhaul cells within the frequency. Wherein the scanning is performed for physical cell identifiers in the intersection of C3 and M3.

15. The method of claim 12, wherein the apparatus is configured with the one or more closed access group identifiers by the communications network.

16. The method of claim 10, wherein the at least one non-transitory memory stores instructions that are executed by the at least one processor to cause the apparatus to at least: Based on the scanning, cells of the communication network are determined as candidate cells having system information to be decoded.

17. The method according to claim 16, comprising: Based on the determination, at least one system information block is received from a cell of the communication network, the at least one system information block indicating that the cell is a closed access group cell and a mobile integrated access and backhaul cell.

18. The method according to claim 17, comprising: Based on the received: Decode system information block 1; detecting cells of the communication network as closed access group cells and mobile integrated access and backhaul in the list of ranges in the communication network; verifying that the detected closed access group identifier of the cell is in a configuration set of a closed access group list or range of the device; as well as Based on the verification, a cell of the communication network is reselected, wherein the reselection does not take into account a dedicated frequency priority of the cell.

19. An apparatus for communication, comprising: means for determining, by the apparatus, information of a list of ranges in the communications network in which at least one closed access group cell is likely to be found and in which at least one mobile integrated access and backhaul cell is likely to be found; means for scanning synchronization signal blocks for a physical cell identifier of a candidate cell, the physical cell identifier being found in both at least one system information block closed access group list or range, and at least one system information block mobile integrated access and backhaul list or range; as well as for decoding system information at the candidate cell based on the scanning to verify that the candidate cell is a component of a mobile integrated access and backhaul cell and a closed access group cell; as well as Means for enabling the apparatus to access the candidate cell for cell reselection based on the decoding.

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