Systems and methods for flexible beam power sharing
By using configuration information and beam-specific DTX/DRX configurations, the system ensures that only UEs capable of downlink coverage enhancements access and prioritize cells with these capabilities, optimizing power allocation and reducing signaling overhead in wireless communication systems.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2026-04-02
AI Technical Summary
Existing wireless communication systems face challenges in efficiently allocating downlink power across satellite beams, particularly in non-terrestrial networks, leading to issues with UEs that do not support downlink coverage enhancements accessing cells that do support these enhancements, and the need for effective cell and beam-specific power sharing strategies.
Implementing configuration information for UEs to differentiate between cells supporting and not supporting downlink coverage enhancements through new indications, using barred bits and separate lists for cell selection/reselection, and providing beam-specific DTX/DRX configurations to manage power sharing effectively.
This approach ensures that only UEs capable of supporting downlink coverage enhancements access and prioritize cells with these capabilities, optimizing power allocation and reducing signaling overhead, thereby enhancing cell load balancing and power efficiency.
Smart Images

Figure CN2024122649_02042026_PF_FP_ABST
Abstract
Description
SYSTEMS AND METHODS FOR FLEXIBLE BEAM POWER SHARINGTECHNICAL FIELD
[0001] The disclosure relates generally to wireless communications, including but not limited to systems and methods for flexible beam power sharing or coverage enhancement.BACKGROUND
[0002] The standardization organization Third Generation Partnership Project (3GPP) is currently in the process of specifying a new Radio Interface called 5G New Radio (5G NR) as well as a Next Generation Packet Core Network (NG-CN or NGC) . The 5G NR will have three main components: a 5G Access Network (5G-AN) , a 5G Core Network (5GC) , and a User Equipment (UE) . In order to facilitate the enablement of different data services and requirements, the elements of the 5GC, also called Network Functions, have been simplified with some of them being software based, and some being hardware based, so that they could be adapted according to need. Communication via satellite is one of the typical scenarios of the non-terrestrial networks in 3GPP standardization.SUMMARY
[0003] The example embodiments disclosed herein are directed to solving the issues relating to one or more of the problems presented in the prior art, as well as providing additional features that will become readily apparent by reference to the following detailed description when taken in conjunction with the accompany drawings. In accordance with various embodiments, example systems, methods, devices and computer program products are disclosed herein. It is understood, however, that these embodiments are presented by way of example and are not limiting, and it will be apparent to those of ordinary skill in the art who read the present disclosure that various modifications to the disclosed embodiments can be made while remaining within the scope of this disclosure.
[0004] At least one aspect is directed to a system, method, apparatus, or a computer-readable medium of the following. In some embodiments, a wireless communication device (e.g., a user equipment (UE) ) may receive configuration information from a wireless communication node (e.g., a base station, or a network) . The configuration information can be for downlink (DL) coverage enhancement (CE) .
[0005] In some embodiments, the configuration information may include a first indication. The first indication can be used to indicate / determine whether the wireless communication device is barred from accessing a serving cell, when the wireless communication device does not support the DL coverage enhancement (CE) (e.g., a UE that does not support the DL CE) . In some embodiments, the configuration information may include a second indication. The second indication can be used to indicate / determine whether the wireless communication device is barred from accessing a serving cell, when the wireless communication device supports the DL coverage enhancement (e.g., a UE that supports the DL CE) . The present application addresses the case where both old UEs and new UEs (e.g., with enhanced capabilities) exist in a system, and how to bar (e.g., prevent, block) UEs that cannot support a new feature (in this case, DL coverage enhancement solutions) from accessing the cell. In such cases, some bits can be used to bar UEs that cannot support DL CE, while UEs supporting the new DL CE can ignore the bits and can rely on one or more newly introduced barred bits. In some embodiments, the configuration information can be received via at least one of: a system information message (e.g., master information block (MIB) , system information block 1 (SIB1) , or system information block 19 (SIB19) ) , or a radio resource control (RRC) message.
[0006] In some embodiments, the configuration information may include a list of neighboring cells that are excluded from cell selection / reselection for the wireless communication device supporting the DL coverage enhancement. In some embodiments, the wireless communication device supporting the DL coverage enhancement may ignore an existing list of neighboring cells that is excluded from the cell selection / reselection for at least one user equipment (UE) not supporting the DL coverage enhancement. The wireless communication device supporting the DL coverage enhancement may determine which cells are excluded from the cell selection / reselection according to the list of neighboring cells that are excluded from the cell selection / reselection for the wireless communication device supporting the DL coverage enhancement. The present application can prevent UEs that do not support DL CE from reselecting to cells that enable DL CE. To achieve this, the network can add those cells to the existing excluded cell list. Meanwhile, UEs that support DL CE may ignore the existing list and can use a new excluded cell list, specifically dedicated to UEs supporting DL CE, to determine which cells are excluded from selection / reselection.
[0007] In some embodiments, the configuration information may include a third indication. The third indication can be used to indicate / determine whether a neighboring cell supports the DL coverage enhancement. The wireless communication device supporting the DL coverage enhancement may determine to prioritize (e.g., to select / reselect) cells that support the DL coverage enhancement according to the third indication. The present application can be applicable for UEs supporting DL CE. Since the third indication is newly introduced, it cannot be recognized by UEs not supporting DL CE. The third indication can be used for UEs supporting DL CE to prioritize selection / reselection to cells supporting DL CE. One of the benefits is cell load balancing. Since only UEs supporting DL CE can access cells that support DL CE, prioritizing UEs that support DL CE to reselect to cells with DL CE helps preserve / save cells without DL CE for UEs that do not support DL CE. In some embodiments, the list of neighboring cells can be for at least one of: intra-frequency, inter-frequency, or inter-frequency inter radio access technology (RAT) neighboring cells.
[0008] In some embodiments, the configuration information may include information associated with at least one SSB (SS / PBCH block) Measurement Timing Configuration (SMTC) . The information may include at least one of: an identifier (ID) for a discontinuous transmission (DTX) or a discontinuous reception (DRX) configuration; a validity duration for a SSB measurement timing configuration; or a validity area for the SSB measurement timing configuration. The present application can associate measurement configuration with beam DTX / DRX configuration. In a cell with DL CE, a measurement periodicity associated with different synchronization signal blocks (SSBs) can have different periodicities, which can be also associated with different DTX / DRX patterns. Therefore, the identifier can be used to associate with a DRX / DTX pattern with the corresponding measurement configuration. Due to movement of satellite and beam hopping mechanism for efficient power sharing among satellite beams, the beam pattern associated the same beam can be different in different time / period or areas. In such case, validity area / time can be used to provide the configuration in advance. A UE can be based on such configuration to decide / determine whether the measurement configuration is applicable which saves the overhead of frequent signaling update.
[0009] In some embodiments, the configuration information may include beam information for a discontinuous transmission (DTX) or a discontinuous reception (DRX) . In some embodiments, the beam information may include at least one of: a list of beam indexes or a bitmap, wherein the list of beam indexes or the bitmap may indicate whether a beam is associated with the DTX or the DRX; a beam type associated with the DTX or the DRX; an identifier (ID) for the DTX or the DRX; a validity duration for the DTX or the DRX; a validity area for the DTX or the DRX; information for the wireless communication device to determine whether the DTX or the DRX is cell specific or beam specific; an ID for a measurement configuration; or an ID for a measurement gap configuration. The present application provides beam specific DTX / DRX configuration. Unlike cell specific DTX / DRX, the configuration may include beams associated with DTX / DRX. Another way to associate DRX / DTX can be to include an identifier of measurement configuration in the DRX / DTX configuration.
[0010] In some embodiments, a wireless communication node (e.g., a base station, or a network) may transmit configuration information to a wireless communication device (e.g., a user equipment (UE) ) . The configuration information can be for downlink (DL) coverage enhancement (CE) . In some embodiments, the first wireless communication node may receive configuration information related to DL coverage enhancement of a second wireless communication node from the second wireless communication node.BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Various example embodiments of the present solution are described in detail below with reference to the following figures or drawings. The drawings are provided for purposes of illustration only and merely depict example embodiments of the present solution to facilitate the reader's understanding of the present solution. Therefore, the drawings should not be considered limiting of the breadth, scope, or applicability of the present solution. It should be noted that for clarity and ease of illustration, these drawings are not necessarily drawn to scale.
[0012] FIG. 1 illustrates an example cellular communication network in which techniques disclosed herein may be implemented, in accordance with an embodiment of the present disclosure;
[0013] FIG. 2 illustrates a block diagram of an example base station and a user equipment device, in accordance with some embodiments of the present disclosure;
[0014] FIG. 3 illustrates a flow diagram of an example method for flexible beam power sharing or coverage enhancement, in accordance with some embodiments of the present disclosure; and
[0015] FIG. 4 illustrates a flow diagram of an example method for flexible beam power sharing or coverage enhancement, in accordance with an embodiment of the present disclosure.DETAILED DESCRIPTION
[0016] 1. Mobile Communication Technology and Environment
[0017] FIG. 1 illustrates an example wireless communication network, and / or system, 100 in which techniques disclosed herein may be implemented, in accordance with an embodiment of the present disclosure. In the following discussion, the wireless communication network 100 may be any wireless network, such as a cellular network or a narrowband Internet of things (NB-IoT) network, and is herein referred to as “network 100. ” Such an example network 100 includes a base station 102 (hereinafter “BS 102” ; also referred to as wireless communication node) and a user equipment device 104 (hereinafter “UE 104” ; also referred to as wireless communication device) that can communicate with each other via a communication link 110 (e.g., a wireless communication channel) , and a cluster of cells 126, 130, 132, 134, 136, 138 and 140 overlaying a geographical area 101. In Figure 1, the BS 102 and UE 104 are contained within a respective geographic boundary of cell 126. Each of the other cells 130, 132, 134, 136, 138 and 140 may include at least one base station operating at its allocated bandwidth to provide adequate radio coverage to its intended users.
[0018] For example, the BS 102 may operate at an allocated channel transmission bandwidth to provide adequate coverage to the UE 104. The BS 102 and the UE 104 may communicate via a downlink radio frame 118, and an uplink radio frame 124 respectively. Each radio frame 118 / 124 may be further divided into sub-frames 120 / 127 which may include data symbols 122 / 128. In the present disclosure, the BS 102 and UE 104 are described herein as non-limiting examples of “communication nodes, ” generally, which can practice the methods disclosed herein. Such communication nodes may be capable of wireless and / or wired communications, in accordance with various embodiments of the present solution.
[0019] FIG. 2 illustrates a block diagram of an example wireless communication system 200 for transmitting and receiving wireless communication signals (e.g., OFDM / OFDMA signals) in accordance with some embodiments of the present solution. The system 200 may include components and elements configured to support known or conventional operating features that need not be described in detail herein. In one illustrative embodiment, system 200 can be used to communicate (e.g., transmit and receive) data symbols in a wireless communication environment such as the wireless communication environment 100 of Figure 1, as described above.
[0020] System 200 generally includes a base station 202 (hereinafter “BS 202” ) and a user equipment device 204 (hereinafter “UE 204” ) . The BS 202 includes a BS (base station) transceiver module 210, a BS antenna 212, a BS processor module 214, a BS memory module 216, and a network communication module 218, each module being coupled and interconnected with one another as necessary via a data communication bus 220. The UE 204 includes a UE (user equipment) transceiver module 230, a UE antenna 232, a UE memory module 234, and a UE processor module 236, each module being coupled and interconnected with one another as necessary via a data communication bus 240. The BS 202 communicates with the UE 204 via a communication channel 250, which can be any wireless channel or other medium suitable for transmission of data as described herein.
[0021] As would be understood by persons of ordinary skill in the art, system 200 may further include any number of modules other than the modules shown in Figure 2. Those skilled in the art will understand that the various illustrative blocks, modules, circuits, and processing logic described in connection with the embodiments disclosed herein may be implemented in hardware, computer-readable software, firmware, or any practical combination thereof. To clearly illustrate this interchangeability and compatibility of hardware, firmware, and software, various illustrative components, blocks, modules, circuits, and steps are described generally in terms of their functionality. Whether such functionality is implemented as hardware, firmware, or software can depend upon the particular application and design constraints imposed on the overall system. Those familiar with the concepts described herein may implement such functionality in a suitable manner for each particular application, but such implementation decisions should not be interpreted as limiting the scope of the present disclosure
[0022] In accordance with some embodiments, the UE transceiver 230 may be referred to herein as an "uplink" transceiver 230 that includes a radio frequency (RF) transmitter and a RF receiver each comprising circuitry that is coupled to the antenna 232. A duplex switch (not shown) may alternatively couple the uplink transmitter or receiver to the uplink antenna in time duplex fashion. Similarly, in accordance with some embodiments, the BS transceiver 210 may be referred to herein as a "downlink" transceiver 210 that includes a RF transmitter and a RF receiver each comprising circuity that is coupled to the antenna 212. A downlink duplex switch may alternatively couple the downlink transmitter or receiver to the downlink antenna 212 in time duplex fashion. The operations of the two transceiver modules 210 and 230 may be coordinated in time such that the uplink receiver circuitry is coupled to the uplink antenna 232 for reception of transmissions over the wireless transmission link 250 at the same time that the downlink transmitter is coupled to the downlink antenna 212. Conversely, the operations of the two transceivers 210 and 230 may be coordinated in time such that the downlink receiver is coupled to the downlink antenna 212 for reception of transmissions over the wireless transmission link 250 at the same time that the uplink transmitter is coupled to the uplink antenna 232. In some embodiments, there is close time synchronization with a minimal guard time between changes in duplex direction.
[0023] The UE transceiver 230 and the base station transceiver 210 are configured to communicate via the wireless data communication link 250, and cooperate with a suitably configured RF antenna arrangement 212 / 232 that can support a particular wireless communication protocol and modulation scheme. In some illustrative embodiments, the UE transceiver 210 and the base station transceiver 210 are configured to support industry standards such as the Long Term Evolution (LTE) and emerging 5G standards, and the like. It is understood, however, that the present disclosure is not necessarily limited in application to a particular standard and associated protocols. Rather, the UE transceiver 230 and the base station transceiver 210 may be configured to support alternate, or additional, wireless data communication protocols, including future standards or variations thereof.
[0024] In accordance with various embodiments, the BS 202 may be an evolved node B (eNB) / next generation Node B (gNB) , a serving eNB / gNB, a target eNB / gNB, a femto station, or a pico station, for example. In some embodiments, the UE 204 may be embodied in various types of user devices such as a mobile phone, a smart phone, a personal digital assistant (PDA) , tablet, laptop computer, wearable computing device, etc. The processor modules 214 and 236 may be implemented, or realized, with a general purpose processor, a content addressable memory, a digital signal processor, an application specific integrated circuit, a field programmable gate array, any suitable programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described herein. In this manner, a processor may be realized as a microprocessor, a controller, a microcontroller, a state machine, or the like. A processor may also be implemented as a combination of computing devices, e.g., a combination of a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other such configuration.
[0025] Furthermore, the steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in firmware, in a software module executed by processor modules 214 and 236, respectively, or in any practical combination thereof. The memory modules 216 and 234 may be realized as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. In this regard, memory modules 216 and 234 may be coupled to the processor modules 210 and 230, respectively, such that the processors modules 210 and 230 can read information from, and write information to, memory modules 216 and 234, respectively. The memory modules 216 and 234 may also be integrated into their respective processor modules 210 and 230. In some embodiments, the memory modules 216 and 234 may each include a cache memory for storing temporary variables or other intermediate information during execution of instructions to be executed by processor modules 210 and 230, respectively. Memory modules 216 and 234 may also each include non-volatile memory for storing instructions to be executed by the processor modules 210 and 230, respectively.
[0026] The network communication module 218 generally represents the hardware, software, firmware, processing logic, and / or other components of the base station 202 that enable bi-directional communication between base station transceiver 210 and other network components and communication nodes configured to communication with the base station 202. For example, network communication module 218 may be configured to support internet or WiMAX traffic. In a typical deployment, without limitation, network communication module 218 provides an 802.3 Ethernet interface such that base station transceiver 210 can communicate with a conventional Ethernet based computer network. In this manner, the network communication module 218 may include a physical interface for connection to the computer network (e.g., Mobile Switching Center (MSC) ) . The terms “configured for, ” “configured to” and conjugations thereof, as used herein with respect to a specified operation or function, refer to a device, component, circuit, structure, machine, signal, etc., that is physically constructed, programmed, formatted and / or arranged to perform the specified operation or function.
[0027] The Open Systems Interconnection (OSI) Model (referred to herein as, “open system interconnection model” ) is a conceptual and logical layout that defines network communication used by systems (e.g., wireless communication device, wireless communication node) open to interconnection and communication with other systems. The model is broken into seven subcomponents, or layers, each of which represents a conceptual collection of services provided to the layers above and below it. The OSI Model also defines a logical network and effectively describes computer packet transfer by using different layer protocols. The OSI Model may also be referred to as the seven-layer OSI Model or the seven-layer model. In some embodiments, a first layer may be a physical layer. In some embodiments, a second layer may be a Medium Access Control (MAC) layer. In some embodiments, a third layer may be a Radio Link Control (RLC) layer. In some embodiments, a fourth layer may be a Packet Data Convergence Protocol (PDCP) layer. In some embodiments, a fifth layer may be a Radio Resource Control (RRC) layer. In some embodiments, a sixth layer may be a Non Access Stratum (NAS) layer or an Internet Protocol (IP) layer, and the seventh layer being the other layer.
[0028] Various example embodiments of the present solution are described below with reference to the accompanying figures to enable a person of ordinary skill in the art to make and use the present solution. As would be apparent to those of ordinary skill in the art, after reading the present disclosure, various changes or modifications to the examples described herein can be made without departing from the scope of the present solution. Thus, the present solution is not limited to the example embodiments and applications described and illustrated herein. Additionally, the specific order or hierarchy of steps in the methods disclosed herein are merely example approaches. Based upon design preferences, the specific order or hierarchy of steps of the disclosed methods or processes can be re-arranged while remaining within the scope of the present solution. Thus, those of ordinary skill in the art will understand that the methods and techniques disclosed herein present various steps or acts in a sample order, and the present solution is not limited to the specific order or hierarchy presented unless expressly stated otherwise.
[0029] 2. Systems and Methods for Flexible Beam Power Sharing or Coverage Enhancement
[0030] Due to implementation limitations, it can be challenging for a satellite to allocate sufficient power for downlink (DL) transmission across all satellite beams. Some methods (e.g., beam hopping, beam sweeping) can be used to allocate power to selected sets of satellite beams over a specific time period. There are options to address power sharing issues, including: beam pattern adaptation when synchronization signal block (SSB) periodicity is extended; cell / beam-specific discontinuous transmission (DTX) / discontinuous reception (DRX) configurations, including user equipment (UE) behaviors when SSB periodicity extension and / or cell / beam, DTX / DRX is configured, and / or how to prevent UEs that cannot support DL coverage enhancement solutions from accessing the network.
[0031] In some embodiments, camping restrictions can be introduced using new indications to inform UEs that supports DL coverage enhancements (CE) whether the cell is barred or not. In the present application, new solutions are proposed to explore how to use these new indications together with barred bits. In some embodiments, the present application discusses how to handle cell priority or prevent cells supporting DL CE from being considered by UEs that do not support DL CE during cell selection and / or cell selection / reselection. In some embodiments, the present application discusses the impact on UE measurement configuration and behavior when SSB periodicity is increased, including the selection of measurement configurations and the association between measurement configurations and beam / cell DTX / DRX. In some embodiments, the present application provides details of beam-specific DTX / DRX configurations, including solutions to address at least one of following sub-issues: how to associate the corresponding DTX / DRX configurations with one or more beams, how UEs determine which beam-specific DTX / DRX configuration can be used, or co-existence of cell-specific and beam-specific configurations, including how UEs determine whether the DTX / DRX is beam-specific or cell-specific.
[0032] In some embodiments, the symbol “ / ” in the present application denotes "and" or "or. " Although the issues and solutions are discussed in the context of Non-Terrestrial Networks (NTN) , these solutions and issues are not limited to NTN but can also be applied to other communication systems, such as terrestrial networks (TN) , air-to-ground (ATG) , or unmanned aerial vehicles (UAV) . In the present application, the term "cell with downlink coverage enhancement (DL CE) " may refer to a cell that supports at least one of the following features: enhanced beam pattern (e.g., extended beam periodicity) , cell / beam-specific DRX for DL coverage enhancement, cell / beam DTX for DL coverage enhancement, or UE-specific DRX / DTX, among others. The term "cell with downlink coverage enhancement (DL CE) " can be an example; other terminologies, such as or similar to "cell with (satellite) beam power sharing, " "cell enabling beam power sharing, " or "cell operating with DL coverage enhancements, " may also be used. In the present application, the term "UE capable of / supports downlink coverage enhancement (DL CE) " may refer to a UE that supports at least one of the following features: enhanced beam pattern (e.g., extended beam periodicity) , cell / beam-specific DRX for DL coverage enhancement, cell / beam DTX for DL coverage enhancement, or UE-specific DRX / DTX, among others.
[0033] In some embodiments, the satellite beam / beam power-sharing solutions discussed in the present application can be part of the strategies to improve coverage in at least one of downlink (DL) and / or uplink (UL) . The beams discussed herein can include at least one of the following: a synchronization signal block (SSB) , a synchronization signal (SS) , a physical broadcast channel (PBCH) block, a channel state information reference signal (CSI-RS) , a CSI-RS for tracking (TRS) , a sounding reference signal (SRS) , a positioning reference signal (PRS) , or other reference signals used in wireless communication systems. In the present application, the terms "cell / beam DRX" and "cell / beam DTX" may refer to DRX and DTX for DL coverage enhancements unless otherwise stated. Examples of possible enhancements that facilitate DL coverage improvements are provided in the following section. Please note that the term "beam power sharing" can be considered equivalent to "DL coverage enhancement" as used in the present application. In the present application, the term SSB measurement timing configuration is used, which can be equivalent to SS / PBCH block measurement timing configuration.
[0034] Implementation Example 1: Barred Restrictions
[0035] In some embodiments, a wireless communication device (e.g., a user equipment (UE) ) may receive at least one configuration information from a wireless communication node (e.g., a base station, or a network) . The at least one configuration information can be for downlink (DL) coverage enhancement (CE) .
[0036] FIG. 3 illustrates a flow diagram of an example method for flexible beam power sharing, in accordance with some embodiments of the present disclosure. The present application discusses how a user equipment (UE) can determine whether a cell operating with downlink (DL) coverage enhancement (CE) can be allowed for access or not based on a barred indication (e.g., cellBarredNTN) and at least one new introduced indication. A cell operating with DL coverage enhancements may refer to a cell that supports at least one of the solutions defined for DL coverage enhancements, and / or for beam power sharing, e.g., extended SSB periodicity, cell / beam DTX / DRX for DL coverage enhancements / beam power sharing.
[0037] An example can be given assuming a wireless communication system is a non-terrestrial network (NTN) network (NW) . cellBarredNTN can be an indication which is used for / by s UE to decide / determine whether a current cell is barred for NTN access or not. An NTN capable UE may determine / consider that the cell is barred for NTN access when the indication is not present or when the indication indicates a value for “barred” . This function can be ported to later release of NTN wireless communication system. Due to the introduction of new features discussed in the present application for DL coverage enhancements, the network may want to bar UEs that cannot support these new features from accessing the current cell. The UEs may include both new UEs and old UEs (those implemented based on prior releases of the specification) . Since old UEs cannot recognize new indication (s) , the network can only use the old indication (s) to restrict access for these old UEs. For example, if a UE is connected to an NTN network, the network can use the cellBarredNTN indication to prevent old UEs from accessing the NTN cell. In contrast, new UEs supporting new features (e.g., new UEs that support DL coverage enhancements) can read the new indication (s) to determine whether the cell is barred when cellBarredNTN is set to barred or is absent. An example is provided in the table below, assuming the wireless communication system is NTN.
[0038] Table 1
[0039] In some embodiments, the at least one configuration information may include a first indication (e.g., cellBarredNTN) . The first indication can be used to indicate / determine whether the wireless communication device (e.g., an old UE) is barred from accessing a serving cell, when the wireless communication device does not support the DL coverage enhancement (CE) (e.g., an old UE, a UE that does not support the DL CE) .
[0040] In some embodiments, the at least one configuration information may include a second indication (e.g., new indication (s) ) . The second indication can be used to indicate / determine whether the wireless communication device (e.g., a new UE) is barred from accessing a serving cell, when the wireless communication device supports the DL coverage enhancement (e.g., a new UE, a UE that supports the DL CE) . The present application addresses the case where both old UEs and new UEs exist in a system, and how to bar UEs that cannot support a new feature (in this case, DL coverage enhancement solutions) from accessing the cell. In such cases, some bits can be used to bar UEs that cannot support DL CE, while UEs supporting the new DL CE can ignore the bits and may rely on one or more newly introduced barred bits.
[0041] In some embodiments, the new indication (s) can be optionally present when the cellBarredNTN is included with a value of barred or is absent. In certain embodiments, the new indication (s) can be absent. In some embodiments, new UEs capable of DL coverage enhancements can read / recognize the new indication (s) to determine / decide whether the cell is barred or not. In certain embodiments, a UE not supporting DL coverage enhancement may not read / recognize the new indication (s) . A UE not supporting DL coverage enhancement may depend on existing bit (s) to decide if the cell is barred or not. In some embodiments, the at least one configuration information can be received via at least one of: a system information message (e.g., master information block (MIB) , system information block 1 (SIB1) , or system information block 19 (SIB19) ) , or a radio resource control (RRC) message. For example, the new indication (s) can be in at least one of: system information (e.g., MIB, SIB1, or SIB19) or a RRC configuration message.
[0042] A newly introduced indication can be used by a UE to determine / decide whether a cell is barred or not for the UE supporting DL coverage enhancement (e.g., cell or beam DTX / DRX, or extended SSB periodicity) . For example, the indication can indicate whether a current cell is barred or not for UEs capable of supporting DL coverage enhancement solutions. In some embodiments, the UE may determine a barred status of the cell when the UE is in (or has) a status of RRC_IDLE or in a status of RRC_INACTIVE, or when the UE is in a status of RRC_CONNECTED.
[0043] In some embodiments, the indication can have a value of not barred, which may indicate that the cell is not barred for UEs supporting DL coverage enhancements. In some embodiments, the absence of the indication may indicate that the cell is barred for UEs supporting DL coverage enhancements. In such case, the present application can reduce signaling overhead for cell (s) that typically / commonly do not supporting DL coverage enhancements, since the cell only provides the indication when the cell wants to support DL coverage enhancements.
[0044] In some embodiments, the indication can have a value of barred, which may indicate that the cell is barred for UEs supporting DL coverage enhancements. In some embodiments, the absence of the indication may indicate that the cell is not barred for UEs supporting DL coverage enhancements. Compared to the previous example, this example can reduce some signaling overhead for cell (s) that typically / usually / commonly supports DL coverage enhancements, since the cell only provides the indication when the cell does not support DL coverage enhancements.
[0045] In some embodiments, the indication can have two values, barred and not barred. Barred may mean / indicate that the cell is barred for UE supporting DL coverage enhancements. Not barred may mean / indicate that the cell is not barred for UE supporting DL coverage enhancements. In some embodiments, the absence of the indication may mean / indicate that the cell is barred for UE supporting DL coverage enhancements.
[0046] In some embodiments, the indication can indicate if a current cell supports DL coverage enhancements. In some embodiments, the indication can have two values. One value may indicate that a current cell supports DL coverage enhancements. Another value may indicate that a current cell does not support DL coverage enhancements. In some embodiments, the absence of the indication may indicate that the current cell does not support DL coverage enhancements. When the cell indicates support of DL coverage enhancements, the cell can be considered as not barred for the UE if the UE supports DL coverage enhancements. Otherwise, the UE may consider the cell as barred.
[0047] In some embodiments, a cell with DL coverage enhancements can be a cell that enables at least one of the solutions discussed in the present application, e.g., cell / beam DTX / DRX for DL coverage enhancements or extended beam (e.g., SSB) periodicity. A UE that supports DL coverage enhancements can be a UE that supports at least one of the solutions discussed in the present application, e.g., cell / beam DTX / DRX for DL coverage enhancements or extended beam (e.g., SSB) periodicity. In certain embodiments, separate indication (s) can be introduced for each DL coverage enhancements solutions, e.g., one for cell / beam DTX / DRX, one for enhanced beam pattern (e.g., extended SSB periodicity) . In some embodiments, a UE may consider a cell to be not barred when the UE is capable of supporting all the indicated features that are not barred for the cell. In some embodiments, only one indication can be introduced for DL coverage enhancements.
[0048] In some embodiments, at least one of the below options can be considered for the UE to decide if the cell is barred or not. In option 1, a UE may determine / consider a cell to be not barred if the UE supports all the features related to DL coverage enhancements. This option is beneficial when all features introduced for DL coverage enhancements are important. If the UE cannot support even one of these features, it can significantly degrade system performance. In option 2, a UE may determine / consider that a cell is not barred if the UE is capable of all the essential features of DL coverage enhancements. In some embodiments, the typical essential features may include cell / beam DTX / DRX and / or an enhanced beam pattern (e.g., extended SSB periodicity) . The non-essential features may involve reporting UE (s) that are interested in DL coverage enhancements, using a UE assisting information message. The latter feature may not impact system performance when the UE does not support it. Therefore, the UE cannot take it into account when deciding / determining whether a cell is barred or not.
[0049] The present application provides a solution where the handling of existing barred bits is different. In some embodiments, the indication can be optionally provided in an NTN. For a UE capable of DL coverage enhancements, the UE may determine / consider the cell to be not barred when the cell is not barred for NTN access and may indicate support for DL coverage enhancements.
[0050] Implementation Example 2: Neighboring Cell Reselections Enhancements
[0051] In some embodiments, a wireless communication device (e.g., a user equipment (UE) ) may receive at least one configuration information from a wireless communication node (e.g., a base station, or a network) . The at least one configuration information can be for downlink (DL) coverage enhancement (CE) .
[0052] The present application discusses how to handle the cell priority or decide candidate neighbor cells during cell selection or cell reselection. For example, when a serving cell is a cell that does not support / enable DL coverage enhancements, both UEs support or cannot support DL CE can be existed in the serving cell. In this case, a network (NW) can provide a list of neighboring cells for a UE to consider for (re) selection during cell (re) selection procedure. Some of the cells may be a cell operating with DL coverage enhancements. For example, a UE that is not capable of DL CE can exclude cells supporting / enabling with DL CE from the cell (re) selection procedures or de-prioritize the cells supporting / enabling DL CE. To achieve this purpose, at least one of the following options can be considered.
[0053] Option 1: An excluded neighboring cell list can be defined for UE (s) supporting DL coverage enhancements. In some embodiments, the at least one configuration information may include a list of neighboring cells that are excluded from cell selection / reselection for a wireless communication device (e.g., UE) supporting DL coverage enhancement. In some embodiments, the wireless communication device supporting the DL coverage enhancement may ignore an existing list of neighboring cells that is excluded from the cell selection / reselection for at least one user equipment (UE) not supporting DL coverage enhancement. The wireless communication device supporting DL coverage enhancement may determine which cells are excluded from the cell selection / reselection according to the list of neighboring cells that are excluded from the cell selection / reselection for the wireless communication device supporting the DL coverage enhancement. The present application can prevent UEs that do not support DL CE from selecting / reselecting to cells that enable DL CE. To achieve this, the network can add those cells enabling DL CE to the existing excluded cell list. Meanwhile, UEs that support DL CE may ignore the existing list and can use a new excluded cell list, specifically dedicated to UEs supporting DL CE, to determine which cells are excluded from cell selection / reselection.
[0054] For a UE that is capable of DL coverage enhancements, the UE may utilize the excluded neighboring cell list defined for UE supporting DL coverage enhancements, to determine / decide whether a cell is excluded from cell selection / reselection or not. Similar to what has been discussed above, old UEs cannot recognize the new lists that have been introduced. Therefore, to exclude the cells operating with DL CE, the network can include such cells in a excluded neighboring cells list, which is not defined for UEs supporting DL CE. Based on this, a UE not capable of DL CE may not consider these cells as candidate neighboring cells. Meanwhile, for DL CE-capable UEs, at least one of the following can be considered for the UE to decide whether a cell is excluded or not. In some embodiments, “exclude the cells” may mean UE does not consider the cells as candidate cells for cell selection / reselection. When a neighboring cell is excluded from the cell selection / reselection, UE can perform at least one of the actions: not performing neighboring cell measurements on the neighboring cells in the excluded neighboring cell list; not considering the neighboring cells in the excluded neighboring cell list as candidate cells for cell selection / reselection; not selecting the SMTC configuration only associated with the cells in the excluded neighboring cell list.
[0055] (1) When the excluded neighboring cell list defined for DL CE is provided, a DL CE-capable UE may ignore the excluded cell list that is not for UEs capable of DL CE, if any. The UE can exclude the cells included in the excluded neighboring cell list defined for UEs capable of DL CE during cell (re) selection. A maximum number of excluded neighboring cells can be defined to limit the number of neighboring cells considered by the UE. For example, an example value can be 16, but other values are also possible.
[0056] (2) A DL CE-capable UE may determine / decide on which cells are excluded neighboring cells based on both lists provided. For example, to improve signaling efficiency, the excluded neighboring cell list defined for UEs supporting DL CE can be represented as a bitmap, where each bit of the bit map may correspond to one entry in the existing excluded neighboring cell list. The first bit (or leftmost bit) may correspond to the first entry of the existing excluded neighboring cell list, the second bit may correspond to the second entry of the existing excluded neighboring cell list, and so on. When a bit is set to 1, it may indicate that the cell included in the excluded neighboring cell list is an excluded neighboring cell for UEs capable of DL CE, while a bit set to 0 may mean that the cell included in the existing excluded neighboring cell list is not an excluded neighboring cell for UEs capable of DL CE.
[0057] In some examples, the bitmap may have a variable length that matches the number of entries in the excluded neighboring cell list. In some embodiments, the bitmap may have a fixed length equal to the maximum number (e.g., Nmax) of entries allowed in the excluded neighboring cell list. In such case, if the actual excluded neighboring cell list includes fewer entries than the allowed maximum number (e.g., N1) , the UE can still consider the first bit corresponding to the first entry of the list, and so forth, until it reaches the actual number (e.g., the N1-1 bit if the first number starts with zero, or the N1 bit if the first number starts with 1) , while setting the remaining bits to zero. The above signaling overhead improvement approach can be useful when the neighboring cells are highly overlapped for UEs capable and not capable of DL CE. However, it can be less flexible when the network wants to provide different neighboring cells for UEs capable and not capable of DL CE. In such case, directly providing a separate excluded neighboring cell list for UE capable of DL CE can be more straightforward.
[0058] Option 2: An allowed cell list can be defined for UE supporting DL coverage enhancements. In some embodiments, the at least one configuration information may include a list of neighboring cells that are allowed for a cell selection / reselection for the wireless communication device supports the DL coverage enhancement. For a UE capable of DL coverage enhancements, the UE may utilize the allowed neighboring cell list defined for UEs supporting DL coverage enhancements to determine whether a cell is permissible for selection / reselection. In some embodiments, “when deciding a cell is allowed for cell (re) selection” may mean UE can consider the cell as candidate cells for cell (re) selection. When a neighboring cell is allowed for the cell (re) selection, a UE can perform at least one of the actions: initiating neighboring cell measurements on the neighboring cells in the allowed neighboring cell list; considering the neighboring cells in the allowed neighboring cell list as candidate cells for cell selection / reselection; selecting the SMTC being associated with the cells in the allowed neighboring cell list.
[0059] As discussed above, some UEs cannot recognize the newly introduced lists. Therefore, to exclude cells operating with DL CE, the network can include such cells in the excluded neighboring cells list, which is not defined for DL CE. Consequently, a UE not capable of DL CE may not consider these cells as candidate cells. In contrast, DL CE-capable UEs can ignore the provided excluded list and can utilize the allowed cell list defined for DL CE to identify permissible neighboring cells. A maximum number of allowed neighboring cells can be defined to limit the number of neighboring cells considered by the UE. For example, an example value can be 16, but other values are also possible.
[0060] In some examples, to improve signaling efficiency, the allowed cell list for UEs supporting DL coverage enhancements can be represented as a bitmap. Each bit of the bit map may correspond to an entry in the legacy allowed cell list. The first bit may correspond to the first entry of the allowed cell list. When a bit is set to 1, it may indicate that the cell included in the legacy allowed neighboring cell list is permitted for DL CE, while a bit set to 0 may mean that the cell is not permitted for DL CE. In some embodiments, the bitmap may have a variable length, corresponding to the number of entries in the legacy allowed neighboring cell list. In some embodiments, the bitmap may have a fixed length equal to the maximum number (e.g., Nmax) of entries allowed in the legacy allowed neighboring cell list. In such a case, if the actual allowed neighboring cell list includes fewer entries than the allowed maximum number (e.g., N1) , the UE may still consider the first bit corresponding to the first entry of the list, and so forth, until it reaches the actual number (e.g., the N1-1 bit if the first number starts with zero, or the N1 bit if the first number starts with 1) , setting the remaining bits to zero. The above signaling overhead improvement approach is useful when neighboring cells are highly overlapping for both DL CE-capable and non-capable UEs. However, it can be less flexible when the network wants to provide different neighboring cells for UEs capable of DL CE and those that are not. In this situation, directly providing a separate allowed neighboring cell list for DL CE is more straightforward.
[0061] Option 3: An indication for indicating whether a cell is a DL CE cell. In some embodiments, the at least one configuration information may include a third indication. The third indication can be used to indicate / determine whether a cell (e.g., neighboring cell or serving cell) supports the DL coverage enhancement. The wireless communication device supporting the DL coverage enhancement may determine to prioritize cells that support the DL coverage enhancement according to the third indication. The present application can be applicable for new UEs, including both UEs supporting or not supporting DL CE. Since the third indication is newly introduced, it cannot be recognized by old UEs. The third indication can be used for UE supporting DL CE to prioritize selection / reselection to cells supporting DL CE. The third indication can be used for UE not supporting DL CE to de-prioritize selection / reselection to cells supporting DL CE. One of the benefits is cell load balancing. Since only UEs supporting DL CE can access cells that support DL CE, prioritizing UEs that support DL CE to reselect to cells with DL CE helps preserve / save cells without DL CE for UEs that do not support DL CE.
[0062] In some embodiments, an indication that identifies the cell as a DL CE cell can be provided. A DL CE-capable UE may consider the cell to be allowed for (re) selection when the cell indicates that the cell supports DL CE, while a UE that does not support DL CE can exclude cells indicating support for DL CE from consideration for (re) selection. This approach is not applicable for legacy UEs, as they cannot recognize the new indications introduced. Therefore, the above options may be useful / integral to exclude cells with DL CE for UEs that are not capable of DL CE. However, such indications can still be useful when the network wants to provide UEs with more detailed information about whether a cell supports DL CE. In some embodiments, a UE capable of DL CE can prioritize cells that support DL CE during the cell (re) selection process. For instance, if a cell with or without DL CE has the same priority based on network-provided configurations, the UE supporting DL CE can prioritize selection / reselection to a cell with DL CE. In some embodiments, the list of neighboring cells can be for at least one of: intra-frequency, inter-frequency, or inter-frequency inter radio access technology (RAT) neighboring cells.
[0063] In some embodiments, for the above-discussed excluded / allowed neighboring cell list for UE capable of DL CE / indication, they can be separately provided for at least one of: intra-frequency, inter-frequency, or inter-frequency inter RAT neighboring cells. The list can be provided to a UE via at least one of the below methods: system information (e.g., SIB2 / 3 / 4 / 19) or a RRC configuration message (e.g., in measurement configuration) . In a 5G network, "inter-frequency inter-RAT neighboring cells" may refer to neighboring cells that operate on different frequencies and / or belong to different radio access technologies (RATs) . The above-discussed excluded / allowed neighboring cell list for DL CE can include at least one of: a list of physical cell ids (PCIs) , frequencies, PCI ranges, or Cell Global Identifiers (CGI) .
[0064] The DL CE capable UE may not consider any exclude-listed cells for UEs capable of DL CE as candidate cells for cell selection / reselection. The DL CE capable UE can consider the allow-listed cells defined for UEs capable of DL CE, if configured, as candidates for cell selection / reselection. In some embodiments, a DL CE capable UE cannot initiate neighboring cell measurements on excluded neighboring cells as discussed in above. For above mentioned options, when deciding a cell is excluded by the UEs for cell selection / reselection, the UEs can perform at least one of the below actions: not initiating neighboring cell measurements on the neighboring cells in the excluded neighboring cell list; not considering the neighboring cells in the excluded neighboring cell list as candidate cells for cell selection / reselection; not selecting the SSB measurement timing configuration (SMTC) being only associated with the cells in the excluded neighboring cell list.
[0065] In some embodiments, in order to help serving cells to configure properly the neighboring cells configurations, cell assisting information related to DL CE configuration of the cell (e.g., whether the cells is operating with DL CE) can be exchanged between NW interfaces. The NW can be at least one of: base station (BS) , core network (CN) , BS central unit (CU) , BS distributed unit (DU) , or other NW functional entity (e.g., Access and Mobility Management
[0066] Function (AMF) , User Plane Function (UPF) , Operations Administration and Management (OAM) ) . The example NW interface can be at least one of Xn , X2, F1 or NG interface. Xn / X2 interface can be example interface for information exchanges between base stations. NG interface can be example interface for information exchanges between base stations and core networks. F1 can be example interface for information exchanges between BS CU and DUs. In some embodiments, the cell assisting information related to DL CE configuration can be at least one of:
[0067] ● An indication indicating cell is operating with DL CE or not. In some embodiments, presence of such indication indicates cell is operating with DL CE otherwise it is absent. In some embodiments, the indication may have two values. One may indicate the cell is operating in DL CE. Another may indicate the cell is not operating in DL CE.
[0068] ● A configuration of SSB of the cell. The configuration of SSB of the cell can be at least one of the parameters as discussed for beam configurations in this applicant. For example, SSB periodicity, SSB position in time domain, SSB index.
[0069] ● An indication indicating SSB periodicity is extended to over 160 ms or not. In some embodiments, presence of such indication indicates the SSB periodicity can be extended to over 160 ms otherwise it is absent.
[0070] ● A configuration of beam DTX / DRX. The configuration of beam DTX / DRX can be at
[0071] least one of the parameters as discussed for beam DTX / DRX in the present application.
[0072] ● A configuration of cell DTX / DRX. The configuration of cell DTX / DRX can be at least one of the parameters as discussed for cell DTX / DRX in the present application.
[0073] The information can be exchanged between NW nodes using existing message or new message defined for proving cell assisting information relevant to DL CE. The existing messages can be at least one of: NG-RAN NODE CONFIGURATION UPDATE message, MOBILITY CHANGE REQUEST message, or HANDOVER REQUEST message.
[0074] Implementation Example 3: Impact on Extended Beam Periodicity
[0075] In some embodiments, a wireless communication device (e.g., a user equipment (UE) ) may receive at least one configuration information from a wireless communication node (e.g., a base station, or a network) . The at least one configuration information can be for downlink (DL) coverage enhancement (CE) .
[0076] In some embodiments, the at least one configuration information may include information associated with at least one measurement configuration (e.g., enhanced SMTC configuration) . The information may include at least one of: an identifier (ID) for a discontinuous transmission (DTX) or a discontinuous reception (DRX) configuration; a validity duration for a measurement configuration (e.g., enhanced SMTC configuration) ; or a validity area for the measurement configuration (e.g., enhanced SMTC configuration) . The present application can associate measurement configuration (e.g., enhanced SMTC configuration) with cell / beam DTX / DRX configuration. In a cell with DL CE, a measurement periodicity associated with different synchronization signal blocks (SSBs) can have different periodicities, which can also be associated with different DTX / DRX patterns. Therefore, the identifier can be used to associate with a DRX / DTX pattern with the corresponding measurement configuration (e.g., SMTC configuration) . Due to movement of satellite and beam hopping mechanism for efficient power sharing among satellite beams, the beam pattern associated with the same beam can be different in different time / periods or areas. In such case, validity area / time can be used to provide / set / determine the configuration in advance. A UE can use / determine such configuration to decide / determine whether the measurement configuration is applicable which reduces the overhead of frequent signaling update.
[0077] In some embodiments, the beam pattern (e.g., SSB periodicity extension) may be enhanced to achieve full coverage of the NTN network. In this context, the SSB periodicity can be extended to over 160 ms, e.g., up to 320ms, 640 ms or larger, while the existing SSB periodicity supports a maximum of only 160 ms. The significantly larger beam periodicity can impact UE measurements based on beams (e.g., SSB) , including the time window for UEs to measure beams, the number of beams to measure, and the measurement periodicity, among others. Furthermore, it is possible that some neighboring cells support extended beam periodicity while others do not. Therefore, methods can be defined to prevent UEs not capable of DL CE from measuring on cells that support DL CEs.
[0078] Due to DL CE solutions introduced (e.g., extended SSB periodicity) , an enhanced SS / PBCH block measurement timing configuration (SMTC) can be introduced, which may include at least one of the following parameters.
[0079] · The beams associated with the SMTC configurations. In some embodiments, the parameter can be a list of beam indexes. In some embodiments, the parameter can be a bitmap. In some embodiments, each bit of the bitmap may correspond to a beam index, where the first bit may correspond to beam 0, the second bit corresponds to beam 1 and so on. The bit can be set to 1 to indicate that the beam (e.g., SSB) is considered for measurement, while the bit can be set to zero to indicate that the beam (e.g., SSB) is not considered for measurement. In some embodiments, the parameter can include indication indicating beams that with odd index or even index is considered for the measurement. For example, the indication can have two values, one can be used to indicate beams with odd indexes are considered for the measurement, while the other can be used to indicate that beams with even indexes are considered for the measurement.
[0080] · The beam types associated with the SMTC configurations. The beam type can be at least one of: the SSB, CSI-RS, or other reference signal defined.
[0081] · Associated frequencies. The associated frequencies may indicate frequencies to be measured.
[0082] · Associated physical cell identities (PCIs) . The associated PCI may indicate the PCI list to be measured.
[0083] · Associated satellite information. The associated satellite information may include at least one of: the satellite ephemeris information, epochTime, common TA parameters, or Kmac. The satellite information can be used by the UE to derive the UE to NW propagation delay, which can be used to adjust measurement timing configurations (e.g., SSB based measurement timing configuration (SMTC) ) .
[0084] · Offset configurations. The offset configurations may indicate an offset of the measurement window in which to receive SS / PBCH blocks.
[0085] · Measurement duration. The measurement duration may indicate a duration of the measurement window in which to receive SS / PBCH blocks.
[0086] · Periodicity of the measurement window. The periodicity of the beams may indicate a periodicity of the measurement window in which to receive beams. In some embodiments, the periodicity of the SMTC can be the same among SMTC associated for the same cell when the beam (e.g., SSB) periodicity of the same cell is the same. In some embodiments, due to dynamic beam power sharing the beam (e.g., SSB) periodicity of the same cell can be different. Therefore, periodicity of SMTC window for SSB measurement can be different. In some embodiments, SMTC can also be associated with different beams. Based on the offset and periodicity together with the measurement duration UE can decide whether at which SFN, which subframe UE can be expected to measure SSB.
[0087] · An index / identifier of beam / cell DTX / DRX configuration for DL CE. The index / identifier can be used to identify a beam / cell DTX / DRX configuration for DL CE. With the extended beam periodicity, the applicable cell / beam DTX / DRX for DL CE can be different. By including such index / identifier, it allows to associate the measurement configuration with a beam / cell DTX / DRX configuration. When a cell / beam DTX / DRX is activated for the UE, the UE can perform measurements based on measurement configuration associated with the beam / cell DTX / DRX. In some embodiments, the index / identifier of beam / cell DTX / DRX can be associated with measurement configurations instead of SMTC configuration.
[0088] · An index / identifier of SMTC configuration. The index / identifier can be used to identify a SMTC configuration.
[0089] · A validity duration for the SMTC configuration. The validity duration may indicate a validity duration of the SMTC configurations. In some embodiments, the validity duration can include at least one of: a start time or a duration which is for a UE to determine / decide whether the SMTC configuration is valid for use. The UE may consider the SMTC configuration is valid since the start time and may keep valid until exceeding the validity duration.
[0090] · A validity area for the SMCT configuration. The validity area may indicate an area for which the SMTC configuration is applicable. A UE based on its location to determine / decide which SMTC configuration to be used. For example, a UE can use the SMTC configurations when the UE is within the validity area associated with the SMTC configurations. For example, a UE cannot use the SMTC configurations when the UE is outside the validity area associated with the SMTC configurations. The validity areas can be presented in at least one of: circular areas with a reference point and a radius, polygon shapes, or a list of tracking areas (TAs) . When a list of TAs is used, the UE may use the measurement configuration associated with the TAs, for the cell to broadcast the TAs. In some embodiments, an index / identifier can be used to identify a validity area. The validity area information provided for a measurement configuration can include / provide the index / identifier (s) of the validity areas. A method for UE to decide it is outside the area of the SMTCs can be the distance between the UEs and the reference location of the cell associated with SMTC is larger (or in another example is larger or equal to) a configured threshold. A method for UE to decide it is inside the area of the SMTCs can be the distance between the UEs and the reference location of the cell associated with SMTC is smaller (or in another example is smaller or equal to) a configured threshold. In some embodiments, hysteresis parameter can be configured, when configured, UE decides it is inside the area of the SMTC when the distance between the UEs and the reference location of the cell associated with the SMTC plus the hysteresis is smaller (or in another example is smaller or equal to) than a configured threshold. The UE may decide it is outside the area of the SMTC when the distance between the UEs and the reference location of the cell associated with the SMTC minus the hysteresis is larger (or in another example is larger or equal to) than a configured threshold. In some embodiments, when both validity areas and validity duration is configured, the UE may consider a SMTC is applicable for measurement when both configured conditions are fulfilled.
[0091] In some embodiments, UE can take into account also excluded neighbor cell list or allowed neighbor cell list as discussed in this applicant or cell / frequencies priorities with or without utilizing the validity duration / or validity time information of the SMTC configuration to select proper SMTC for measurement. In some embodiments, when UE decides a set of SMTCs as applicable (e.g., when its location is within validity areas or when it is within the validity time or when both conditions are satisfied) , the UE may not select SMTCs is only associated with cells (e.g., PCIs) / frequencies that is included in the excluded neighboring cells list. In some embodiments, when UE decides a set of SMTCs as applicable (e.g., when its location is within validity areas or when it is within the validity time or when both conditions are satisfied) , the UE can prioritize selection of SMTCs that associated with cells (e.g., PCIs) / frequencies that have higher priorities. In some embodiments, if they have the the same priorities, the UE can select either of them based on its implementation. For instance, when UE decides there are 6 SMTCs are applicable, but UE is only able to perform measurements based on 4 SMTCs, then UE can prioritize the SMTCs that are associated with cells / frequencies that has higher priorities. In some embodiments, when UE decides a set of SMTCs as applicable (e.g., when its location is within validity areas or when it is within the validity time or when both conditions are satisfied) , the UE can select the SMTCs that are associated with cells (e.g., PCIs) / frequencies that is included in allowed cell list among the applicable SMTC list. In some embodiments, when there is no validity areas / validity duration configured, the UE can select SMTCs taking into account the excluded neighbor cell list or allowed neighbor cell list as discussed in the application or cell / frequencies priorities. For example, in some embodiments, when UE receives a set of SMTCs, the UE may not select SMTCs is only associated with cells (e.g., PCIs) / frequencies that is included in the excluded neighboring cells list. In some embodiments, this behavior can be enabled by indication from NW, e.g., UE exclude SMTCs is only associated with cells (e.g., PCIs) / frequencies that is included in the excluded neighboring cells list when receives indication indicating this is allowed from NW. The indications can be provided to UE in at least one of system information or in UE dedicated signaling (e.g., RRC messages) . In some embodiments, when UE receives a set of SMTC configurations, the UE can prioritize selection of SMTCs that associated with cells (e.g., PCIs) / frequencies that have higher priorities. In some embodiments, if they have the same priorities, the UE can select either of them based on its implementation. In some embodiments, this behavior can be enabled by indication from NW, e.g., UE prioritize selection of SMTCs associated with cells (e.g., PCIs) / frequencies with higher priorities when receives indication indicating this is allowed from NW. The indications can be provided to UE in at least one of system information or in UE dedicated signaling (e.g., RRC messages) . For instance, when UE receives 6 SMTCs, but UE is only able to perform measurements based on 4 SMTCs, the UE can prioritize the SMTCs that are associated with cells (e.g., PCIs) / frequencies that has higher priorities. In some embodiments, when UE receives a set of SMTCs, the UE can select the SMTCs that are associated with cells (e.g., PCIs) / frequencies that is included in allowed cell list among the received SMTC list. In some embodiments, this behavior can be enabled by indication from NW, e.g., UE select the SMTCs that are associated with cells (e.g., PCIs) / frequencies that is included in allowed cell list among the received SMTC list when receives indication indicating this is allowed from NW. The indications can be provided to UE in at least one of system information or in UE dedicated signaling (e.g., RRC messages) .
[0092] In some embodiments, the validity time / areas can be introduced to handle the movement of satellites, e.g., for moving cell scenarios. For a static UE, the satellite can be continuously moving and the available beams for measurement can have different transmission pattern (e.g., different periodicity) . Therefore, the applicable measurement configuration can also be different. In such a case, the validity time and / or areas can be used for UE to autonomously select the applicable SMTC configurations.
[0093] In some embodiments, the above discussed enhanced SMTC configurations can be included in measurement configurations provided to UE via dedicated signaling (e.g., in RRC message) for serving or neighboring cell measurement. In some embodiments, the above discussed enhanced SMTC configurations can be provided to UE via system information (e.g., SIB2 / 3 / 4 / 19) for neighboring cell measurement.
[0094] Implementation Example 4: Beam DTX / DRX for DL CE
[0095] In some embodiments, a wireless communication device (e.g., a user equipment (UE) ) may receive at least one configuration information from a wireless communication node (e.g., a base station, or a network) . The at least one configuration information can be for downlink (DL) coverage enhancement (CE) .
[0096] In some embodiments, the at least one configuration information may include beam information for a discontinuous transmission (DTX) or a discontinuous reception (DRX) . In some embodiments, the beam information may include at least one of: a list of beam indexes or a bitmap, wherein the list of beam indexes or the bitmap may indicate whether a beam is associated with the DTX or the DRX; a beam type associated with the DTX or the DRX; an identifier (ID) for the DTX or the DRX; a validity duration for the DTX or the DRX; a validity area for the DTX or the DRX; information for the wireless communication device to determine whether the DTX or the DRX is cell specific or beam specific; an ID for a measurement configuration; or an ID for a measurement gap configuration. The present application provides beam specific DTX / DRX configuration. Unlike cell specific DTX / DRX, the configuration may include beams associated with DTX / DRX. Another way to associate DRX / DTX can be to include an identifier of measurement configuration in the DRX / DTX configuration.
[0097] In some embodiments, both beam and cell DTX / DRX can be utilized for a cell supporting DL coverage enhancements. In this implementation example, more details are provided to help the UE decide which beams are associated with the beam DTX / DRX. Additionally, information is introduced to allow differentiation between cell / beam DTX / DRX. The beam DTX / DRX can include at least one of the following pieces of information.
[0098] · The beams associated with the beam DTX / DRX. In some embodiments, the information can be a list of beam index (e.g., SSB index) . In some embodiments, the information can be a bitmap wherein the first / leftmost bit may correspond to beam index 0, the second bit may correspond to beam index 1, and so on. Value 0 in the bitmap may indicate that the corresponding beam is not associated with the beam DTX / DRX while value 1 may indicate that the corresponding beam is associated with the beam DTX / DRX or vice versa. In some embodiments, the parameter can include indication indicating beams that with odd index or even index is considered for beam DTX / DRX. For example, the indication can have two values, one can be used to indicate beams with odd indexes are considered for the beam DTX / DRX, while the other can be used to indicate that beams with even indexes are considered for the beam DTX / DRX. The beam can be at least one of: a SSB, a SSB, a CSI-RS or other reference signal that is supported. In some embodiments, a UE may decide / determine, based on the used / scheduled beams, which beam DTX / DRX is used. For example, a UE can use the activated beam DTX / DRX for the beams that is currently used / scheduled for the UE. For example, if beam DTX / DRX 1 is associated with beam 1, 2, 3 and beam DTX / DRX 2 is associated with beam 4, 5, 6, and beam DTX / DRX 3 is associated with beam 1, 4, 5, and beam DTX / DRX 1 / 2 is activated while beam DTX / DRX 3 is not activated. In such a case, if the UE is using / scheduled with beam 4, the UE can use beam DTX / DRX 2. In some embodiments, absence of the associated beam information can implicitly imply that the DTX / DRX is for the whole cell.
[0099] · The beam types. The beam type may indicate a beam type associated with the beam DTX / DRX. It can be at least one of: an SSB, a CSI-RS, or other reference signal supported.
[0100] · The index / identifier of beam DTX / DRX configuration for DL CE. The index / identifier can be used to identify a beam DTX / DRX configuration for DL CE. The indication can also include for cell DTX / DRX which can be used to identify a cell DTX / DRX configuration for DL CE.
[0101] · A validity duration for beam DTX / DRX. The validity duration may indicate a validity duration of the DTX / DRX. In some embodiments, the validity duration can include at least one of: a start time or a duration which is for UE to decide whether the beam DTX / DRX is valid for use. The UE may consider the beam DTX / DRX is valid since the start time and may keep valid until exceeding the validity duration.
[0102] · A validity area for the beam DTX / DRX. The validity area may indicate an area the beam DTX / DRX being applicable. The UE can be based on its location to decide which beam DTX / DRX to be used. For example, the UE may use the beam DTX / DRX when the UE is within the validity area associated with the beam DTX / DRX. The validity areas can be presented / arranged / defined in / as at least one of: circular areas with a reference point and a radius, polygon shapes, or a list of tracking areas (TAs) . When a list of TAs is used, the UE may use the beam DTX / DRX associated with the TAs for the cell to broadcast the TAs. In some embodiments, an index / identifier can be used to identify a validity area. The validity area information provided for a beam DTX / DRX can indicate the index / identifier (s) of the validity areas. A method for UE to decide it is outside the validity area of the beam DTX / DRX can be the distance between the UEs and the reference location of the beam DTX / DRX is larger (or in another example is larger or equal to) than a configured threshold. A method for UE to decide it is inside the area of the beam DTX / DRX can be the distance between the UEs and the reference location of the beam DTX / DRX is smaller (or in another example is smaller or equal to) than a configured threshold. In some embodiments, hysteresis parameter can be configured, when configured, the UE may decide it is inside the area of the beam DTX / DRX when the distance between the UEs and the reference location of the beam DTX / DRX plus the hysteresis is smaller (or in another example is smaller or equal to) than a configured threshold. The UE may decide it is outside the area of the beam DTX / DRX when the distance between the UEs and the reference location of the beam DTX / DRX minus the hysteresis is s larger (or in another example is larger or equal to) than a configured threshold. In some embodiments, when both validity areas and validity duration is configured, the UE may consider a SMTC is applicable for measurement when both configured conditions are fulfilled.
[0103] · Information for a UE to determine whether the DTX / DRX is cell specific or beam specific. In some embodiments, the information can be implicit based on presence of beam associated with the DTX / DRX for DL CE. When the DTX / DRX for DL CE is not associated with a subsets of beams, it may imply that the DTX / DRX is for the whole cell. In some embodiments, the information can be an type indication. In some embodiments, the information can be the type of indication indicating whether the DTX / DRX is cell specific or not. When the indication indicates that the DTX / DRX is for a cell, then it is for a cell, otherwise it is beam specific. In certain embodiments, the information can be a type indication indicating whether the DTX / DRX is beam specific or not. When the indication indicates that DTX / DRX is for a subsets of beams, then it is beam specific, otherwise it is cell specific. In some embodiments, the type indication can have two values. One value may indicate the DTX / DRX is for cell. Another value may indicate that the DTX / DRX is for a subset of beams.
[0104] · The index / identifiers of measurement configurations. The index / identifiers of measurement configurations can be associated with a measurement configuration. Based on this information, the index / identifiers can associate the beam DTX / DRX pattern with the measurement configurations. For example, if a UE is configured with an activated beam DTX / DRX, and the beam DTX / DRX includes a list of index / identifiers of measurement configurations, the UE can utilize the measurement configuration associated with the index / identifiers to perform measurements. In some embodiments, the indication can be at least one of the measId (s) specified in the standards.
[0105] · The index / identifiers of SMTC configurations. The index / identifiers of SMTC configurations can be associated with a SMTC configuration. Based on this information, the index / identifiers can associate the beam DTX / DRX pattern with the SMTC configurations. For example, if a UE is configured with an activated beam DTX / DRX, and the beam DTX / DRX includes a list of index / identifiers of SMTC configurations, the UE can utilize the SMTC configuration associated with the index / identifiers to perform measurements.
[0106] · The index / identifiers of measurement gap configurations. The index / identifiers of measurement configurations can be associated with a measurement gap configuration. Based on this information, the index / identifiers can associate the beam DTX / DRX pattern with the measurement gap configurations. For example, if a UE is configured with an activated beam DTX / DRX, and the beam DTX / DRX includes a list of index / identifiers of measurement gap configurations, the UE can utilize the measurement gap configuration associated with the index / identifiers to perform measurements. In some embodiments, the indication can be MeasGapId as specified in the standards.
[0107] · The information to indicate the applicable RRC modes for the DTX or DRX configuration. Based on this information UE can know whether the DTX / DRX is applicable to which RRC modes. The RRC modes can include at least one of RRC_IDLE, RRC_INACTIVE OR RRC_CONNECTED modes. In some embodiments, the information can have multiple values where each values indicate one RRC modes. Furthermore, in some examples, a value (e.g., all) can indicate the DTX / DRX is applicable for all RRC modes. In some embodiments, the information can have multiple values, one can be for non-connected node, which may indicate the DTX / DRX is applicable to RRC_IDLE or RRC_INACTIVE mode, on is for non-connected node, which may indicate the DTX / DRX is applicable to RRC_CONNECTED mode. Furthermore, in some examples, a value (e.g., all) can indicate the DTX / DRX is applicable for all RRC modes.
[0108] · An on duration to indicate the duration of activated time. In some examples, it can also be called as active time, on duration, on period, in which DL transmission and / or UL transmission is allowed. If the duration is configured for DL transmission then DL transmission is allowed during this time period. If the duration is configured for UL transmission, the UL transmission can be allowed during this time period.
[0109] · A starting position in time domain to indicate the start timing of the on duration. In some examples, the starting time can be in slot level, or in frame level or in seconds level or in milliseconds level.
[0110] · A periodicity within the on duration, which may indicate the periodicity UE expects to monitoring scheduling information (e.g., PDCCH) . In some embodiments, the UE may consider the activated time is in time instance indicated by the periodicity. In some examples, the periodicity can be optionally configured, when not configured, the UE may monitor PDCCH during the on duration, e.g., the active time is the whole on duration.
[0111] · An offset used to determine the beginning of the on duration time. If configured, the UE can delay the monitoring time during on duration by the offset configured, e.g., UE consider that, in some examples, the offset can be optionally configured. When not configured, the UE may not consider the offset when deciding the starting timing of the active time.
[0112] · An off duration to indicate the duration of deactivated time. In some examples, the off duration can be counted right after the end of on duration. In some examples, it can also be called as deactivation time, off duration, off period, in which DL transmission and / or UL transmission is not allowed. If the duration is configured for DL transmission, the DL transmission may not be allowed during this time period. If the duration is configured for UL transmission, the UL transmission may not be allowed during this time period.
[0113] · A cycle to indicate the periodicity of a DRX or DTX. In some examples, the cycle consists of an on duration and an off duration, therefore it can be derived based on on-duration and off duration configuration. In some examples, the off duration can be derived based on cycle configuration and on-duration configuration. In some examples, the on duration can be derived based on cycle configuration and off-duration configuration.
[0114] · Parameter to indicate whether the configuration is for DTX, or for DRX.
[0115] · In some examples, different Information Elements (IEs) can be used to configure DRX for beam power sharing and DTX for beam power sharing. The differentiation of configuration type can be done by the IE name.
[0116] · In some examples, the indication can have three values, to indicate it is a configuration for DRX, for DRX or for both.
[0117] · In some examples, the indication can have two values, to indicate it is a configuration for DRX or for DRX
[0118] · A status indication to indicate whether the DTX / DRX configuration associated with the indication is activated or not. In some examples, the indication can have two values, which one value indicates that the DTX / DRX is activated, which one value indicates that the DTX / DRX is deactivated. In some examples, the indication has only one value indicating the cell DTX / DRX is activated while the absence of the indication indicates the DTX / DRX is deactivated. In some examples, the indication has only one value indicating the cell DTX / DRX is deactivated while the absence of the indication indicates the DTX / DRX is activated.
[0119] · An RNTI value for scrambling the CRC used for the DCI for activating or deactivating the DRX / DTX configuration.
[0120] · An RNTI value for scrambling the CRC used for the DCI for activating or deactivating CHO indication for DL coverage enhancement.
[0121] · In some examples, only one RNTI value is used to scrambling the CRC used for the DCI for activating or deactivating the DRX / DTX configuration and / or CHO indication for DL coverage enhancement. . In such case, the same DCI format is used to activate / deactivate the DRX / DTX configuration and / or CHO indication for DL coverage enhancement..
[0122] In some embodiments, the above information discussed for beam DTX / DRX and UE behaviors can apply to cell DTX / DRX. For example, the index / identifiers of SMTC configurations / measurement configurations can be associated with cell DTX / DRX, for which UE can decide which SMTC configuration / measurement configuration is considered for measurement during when the activated cell DTX / DRX is used by the UE. Apart from the UE behaviors discussed here, a UE can also perform at least one of the following behaviors when UE is configured with cell / beam DTX / DRX, including RACH adaption, adaption to radio link monitoring, or measurements.
[0123] UE actions when DTX is configured and activated
[0124] ● During activated time for DL transmission (e.g., activated time of cell / beam DTX, or activated time for a cell or activated time for a beam) , at least one of below actions can be considered at UE side:
[0125] ■ Monitor PDCCH in the serving cell (s) , using the beams associated with the DTX configurations if only subset of beams are configured for the DTX configuration, otherwise using all beams configured for the cell, where the configuration is activated.
[0126] ■ Receive DL assignment if configured in the serving cell (s) using the beams associated with the DTX configurations if only subset of beams are configured for the DTX configuration, otherwise using all beams configured for the cell, where the configuration is activated.
[0127] ■ Restart the random access response (RAR) window, if previously suspended. In some embodiments, the UE may start the RAR window if the RAR window has not been started since last preamble / MsgA transmission. In some embodiments, the RAR window can be at least one of RAR window of 4 step RACH or MsgB response window (e.g., msgB-ResponseWindow) for 2 step RACH. In some embodiments, UE may restart the RAR window in case the beams used to transmit the first message of RACH (e.g., Msg1 of 4step RACH or MsgA of 2step RACH) is associated with the activated DTX configuration.
[0128] ■ Extend the RAR window length. In some embodiments, the RAR window length can be extended by the cycle of DTX using the beams associated with the DTX configurations if only subset of beams are configured for the DTX configuration, otherwise using all beams configured for the cell, , e.g., if RAR window equals to x before extension, when DTX is configured and activated, the extended RAR window equals to x plus DTX cycle. In some embodiments, a UE may not monitor the PDCCH when entering deactivated time and the RAR window is running. The RAR window can be RAR window for 4-stepRACH or MsgB response window of 2-step RACH.
[0129] ■ Restart the contention resolution timer if previously suspended for 4 step RACH. In some embodiments, the UE may start contention resolution timer if the contention resolution timer has not been started since last Msg3 transmission. In some embodiments, UE restarts the contention resolution timer in case the beams used to transmits the Msg3 is associated with the activated DTX configuration.
[0130] ■ Extend the contention resolution timer length. In some embodiments, the contention resolution timer length can be extended by the cycle of DTX. e.g., if contention resolution timer equals to y before extension, when DTX is configured and activated, the extended contention resolution timer equals to y plus DTX cycle. In some embodiments, the UE may not monitor the PDCCH when entering deactivated time and the contention resolution timer is running.
[0131] ■ Restart the DRX retransmission timer if previously suspended. The retransmission timer may include at least one of drx-RetransmissionTimerDL, drx-RetransmissionTimerUL or drx-RetransmissionTimerSL.
[0132] ■ Perform measurements on serving cell based on configuration provided by NW using the beams associated with the DTX configurations if only subset of beams are configured for the DTX configuration, otherwise using all beams configured for the cell.
[0133] ■ Perform neighboring cells / neighboring frequencies based on configuration provided by NW using the beams associated with the DTX configurations if only subset of beams are configured for the DTX configuration, otherwise using all beams configured for the cell.
[0134] ■ Acquire system information (e.g., MIB, SIB1, SIB19) using the beams associated with the DTX configurations if only subset of beams are configured for the DTX configuration, otherwise using all beams configured for the cell.
[0135] ◆ In some examples, a validity duration can be associated with a system information which specify the period UE is not required to reacquire the system information. If during the activated time, the system information can be considered as valid based on the validity duration, the UE may not acquire to reacquire the system information.
[0136] ◆ In some examples, a timer can be configured for a system information, if the timer expires or the timer is suspended during activated time, the UE can reacquire the corresponding system information.
[0137] ■ Perform at least one of below actions related to radio link monitoring using the beams associated with the DTX configurations if only subset of beams are configured for the DTX configuration, otherwise using all beams configured for the cell.
[0138] ◆ In some examples, if the timer configured for radio link monitoring (e.g., T310, T312) has been suspended during deactivated period, the UE can reset the timer when back to activated period.
[0139] ◆ Perform radio link monitoring (RLM) , or resume performing RLM if the action has been suspended before.
[0140] ◆ Perform detection of physical layer synchronization status. In some examples, the UE can reset the counter used to count the out-of-sync indications when comes back to activated time from deactivated time.
[0141] ■ Perform at least one of below adaption for TAT (timeAlignmentTimer) timer:
[0142] ◆ Restart TAT timer if it has been suspended previously.
[0143] ◆ Extend the TAT timer length. In some examples, the TAT timer length can be extended by the DTX cycle.
[0144] In case the DTX configuration is configured for a cell, the UE may apply at least one of actions in activated time as descried above for the cell associated with the activated DTX configuration. In case the DTX configuration is configured for a beam, the UE may apply at least one of actions in activated time as descried above for the beam associated with the activated DTX configuration.
[0145] ● During deactivated time for DL transmission (e.g., deactivated time of cell / beam DTX, or deactivated time for a cell or deactivated time for a beam) , at least one of below actions can be considered at UE side:
[0146] ■ Not monitor PDCCH in the beams associated with the DTX configurations if only subset of beams are configured for the DTX configuration, otherwise if the DTX configuration is for a cell, not monitor PDCCH in the cell .
[0147] ◆ In some examples, the UE may not monitor the PDCCH regardless whether UE is considered as in Active Time based on running of other timers or based on DRX timers, when there is on-going RACH-less procedure, when there is pending SR or when a PDCCH indicating a new transmission addressed to the C-RNTI (radio network temporary identifier) of the MAC entity has not been received after successful reception of a Random Access Response for the Random Access Preamble not selected by the MAC entity among the contention-based Random Access Preamble. The other timers may include at least one of RAR window of RACH procedure (e.g., ra-ResponseWindow, msgB-ResponseWindow) , contention resolution timer of RACH procedure, retransmission timers specified for DRX (e.g., drx-RetransmissionTimerDL, drx-RetransmissionTimerUL or drx-RetransmissionTimerSL) , drx-onDurationTimer or drx-InactivityTimer.
[0148] ■ Not instruct the physical layer to receive transport block on the DL-SCH of this Serving Cell according to a configured downlink assignment for SPS in the beams associated with the DTX configurations if only subset of beams are configured for the DTX configuration, otherwise if the DTX configuration is for a cell, not Not instruct the physical layer to receive transport block on the DL-SCH of this serving Cell according to a configured downlink assignment for SPS in the cell .
[0149] ■ Not indicate the presence of a configured downlink assignment and deliver the stored HARQ (hybrid automatic repeat request) information to the HARQ entity. In some embodiments, the UE may not indicate the presence of a configured downlink assignment and deliver the stored HARQ (hybrid automatic repeat request) information to the HARQ entity in the beams associated with the DTX when the DTX configurations is associated a subset of beams.
[0150] ■ Not set the HARQ Process ID to the HARQ Process ID associated with the PDSCH (physical downlink shared channel) duration of a configured downlink assignment. In some embodiments, the UE may not set the HARQ Process ID to the HARQ Process ID associated with the PDSCH (physical downlink shared channel) duration of a configured downlink assignment associated with the beams associated with the DTX, when the DTX configurations is associated with a subset of beams.
[0151] ■ Not consider the NDI bit for the HARQ process corresponding to the PDSCH duration of a configured downlink assignment to have been toggled for the configured downlink assignment. In some embodiments, the UE may not consider the NDI bit for the HARQ process corresponding to the PDSCH duration of a configured downlink assignment to have been toggled if the beams associated with the configured downlink assignment are associated with the beams associated with the DTX, when the DTX configurations is associated with a subset of beams.
[0152] ■ Perform at least one of below adaptions for timers / windows specified in RACH procedure, the RACH procedure can be 2step RACH or 4step RACH.
[0153] ◆ Suspend the running of RAR window, if running. The RAR window can be at least one of RAR window of 4step RACH or MsgB response window (e.g., msgB-ResponseWindow) for 2 step RACH. In some embodiments, UE may suspend the running of RAR window in case the beams used to transmit the first message of RACH (e.g., Msg1 of 4step RACH or MsgA of 2step RACH) is associated with the activated DTX configuration.
[0154] ◆ Suspend the running of contention resolution timer if running for 4 step RACH. In some embodiments, UE may suspend the contention resolution timer in case the beams used to transmit the Msg3 is associated with the activated DTX configuration.
[0155] One of the intentions of suspending the timer as discussed above is to avoid the corresponding timer / window from expiry and trigger unnecessary retransmission of UL message of RACH procedure, since it is possible that NW has already received the previous PUSCH / Preamble transmission, but the transmission of corresponding response in the DL cannot happen due to the cell is on deactivated time of cell / beam DTX. A NW may resume transmission of the corresponding DL transmission when the cell is in activated time of cell / beam DTX.
[0156] ◆ In some examples, if the timer / window of RACH procedure as discussed above is not suspended, then at least one of below behaviors can be considered at UE’s side:
[0157] · UE may not consider the contention resolution as fails when RA contention resolution timer expires.
[0158] · UE may not consider the RA response reception as fails when RAR window expires.
[0159] · UE may not consider the MsgB reception as fails when MsgB response window (e.g., msgB-ResponseWindow) expires.
[0160] ◆ In some examples, the RAR window or MsgB response window (e.g., msgB-ResponseWindow) or RA contention resolution timer can be extended by a period of time to avoid the timer or window from expiry during deactivated period. In some examples the window length (e.g., RAR window length, MsgB response window length) or the timer length (e.g., contention resolution timer length) can be extended by DTX cycle.
[0161] ■ Perform at least one of below adaptions for DRX retransmission timers
[0162] ◆ Suspend the running of DRX retransmission timer if running. The retransmission timers specified for DRX can be at least one of drx-RetransmissionTimerDL, drx-RetransmissionTimerUL or drx-RetransmissionTimerSL.
[0163] ■ Not trigger RACH in the beams associated with the DTX configurations if only subset of beams are configured for the DTX configuration, otherwise not trigger RACH in all beams configured for the cell, when the configuration is activated.
[0164] ■ Not perform measurements on serving cell or not perform measurements in the beams associated with the DTX configurations if only subset of beams are configured for the DTX configuration.
[0165] ■ Not perform measurements on configured neighboring cell / neighboring frequencies or not perform measurements on configured neighboring cell / neighboring frequencies in the beams associated with the DTX configurations if only subset of beams are configured for the DTX configuration.
[0166] ■ Perform at least one of the actions related to system information acquisition:
[0167] ◆ Not acquire system information (e.g., MIB, SIB1) , or not acquire system information (e.g., MIB, SIB1) , in the beams associated with the DTX configurations if only subset of beams are configured for the DTX configuration.
[0168] ◆ In some embodiment if a validity duration has been configured for a system information, at least one of below can be considered.
[0169] ● If the validity duration expires while UE is on deactivated duration of the cell / beam DTX, UE doesn’ t reacquire the system information during the deactivated period.
[0170] ● If a timer has been specified for a system information to count the validity duration of the system information, suspend or stop the timer if it is running during the deactivated period / when UE enters deactivated period. By doing so, it can avoid triggering reacquiring the system information.
[0171] ■ Perform at least one of adaptions relevant to RLM.
[0172] ◆ In some examples, if the timer configured for radio link monitoring (e.g., T310, T312) is running when UE enters deactivated period, UE can suspend the timer or stop the timer. Or in some examples, if the timer expires during the deactivated period, UE doesn’ t trigger radio link recovery procedure. Or in some examples the length of the timer configured for radio link monitoring can be extended by DTX cycle.
[0173] ◆ Does not perform radio link monitoring, or suspend performing RLM. In some embodiments, the UE may not perform radio link monitoring, or suspends performing RLM in the beams associated with the DTX configurations if only subset of beams are configured for the DTX configuration.
[0174] ◆ Does not perform or suspend detection of physical layer synchronization status. In some embodiments, the UE may not perform or suspend detection of physical layer synchronization status in the beams associated with the DTX configurations if only subset of beams are configured for the DTX configuration.
[0175] In case the DTX configuration is configured for a cell, the UE may apply at least one of actions in deactivated time as descried above for the cell associated with the activated DTX configuration. In case the DTX configuration is configured for a beam, the UE may apply at least one of actions in deactivated time as descried above for the beam associated with the activated DTX configuration.
[0176] UE actions when DRX is configured and activated
[0177] ● During activated time for UL transmission (e.g., activated time of cell DRX or activated time for a cell or activated time for a beam) , at least one of below actions can be considered at UE side.
[0178] ■ Perform PUSCH transmission based on valid UL grant. The UL grant can be at least one of the grants received in response of random access procedure (e.g., RA response of 4step RACH or MsgB of 2 step RACH) . In some embodiments, the UE may consider the UL grant as valid when it is associated with beams associated with the DRX configuration.
[0179] ■ Trigger RACH when corresponding triggering condition is fulfilled. In some embodiments, the UE may only trigger RACH in the beams associated with the DRX configuration.
[0180] ■ Trigger Scheduling Request (SR) when corresponding triggering condition is fulfilled. In some embodiments, the UE may only trigger SR in the beams associated with the DRX configuration.
[0181] ■ Performing PUCCH (physical uplink control channel) transmission, e.g., for CSI-report. In some embodiments, the UE may only perform PUCCH transmission in the beams associated with the DRX configuration.
[0182] ■ Perform at least one of below adaption for TAT timer.
[0183] ◆ Restart TAT timer if it has been suspended previously.
[0184] ◆ Extend the TAT timer length. In some examples, the TAT timer length can be extended by the DRX cycle.
[0185] In case the DRX configuration is configured for a cell, the UE may apply at least one of actions in activated time as descried above for the cell associated with the activated DRX configuration. In case the DRX configuration is configured for a beam, the may UE apply at least one of actions in activated time as descried above for the beam associated with the activated DRX configuration.
[0186] ● During deactivated time of cell / beam specific DRX, at least one of below actions can be considered at UE side:
[0187] ■ Not instruct the physical layer to signal a SR on a PUCCH resource for SR.
[0188] ■ Not increment the SR_COUNTER for a SR.
[0189] ■ Not start the sr-ProhibitTimer for a SR.
[0190] ■ Not deliver any configured uplink grant and the associated HARQ information to the HARQ entity.
[0191] ■ Not instruct a HARQ process associated with a configured uplink grant to trigger a new transmission or a retransmission.
[0192] ■ Not report periodic CSI on PUCCH and semi-persistent CSI configured on PUSCH.
[0193] ■ Delay the triggering of RACH procedure due to an emergency service is initiated by upper layers in SpCell to until UE enters activated time of cell DRX.
[0194] ■ Not trigger RACH procedure regardless of whether the triggering conditions is fulfilled or not.
[0195] ■ Not trigger SR regardless of whether the triggering conditions is fulfilled or not.
[0196] ■ Not perform Physical Uplink Shared Channel (PUSCH) transmission.
[0197] ■ Not perform PUCCH transmission.
[0198] ■ In some examples, the UE may not perform any UL transmission.
[0199] ■ Flush HARQ buffer.
[0200] ■ Perform at least one of below adaption for TAT timer:
[0201] ◆ Suspend TAT timer if it is running.
[0202] ◆ Extend the TAT timer length. In some examples, the TAT timer length can be extended by the DRX cycle.
[0203] In case the DRX configuration is configured for a cell, the UE may apply at least one of actions in deactivated time as descried above for the cell associated with the activated DRX configuration. In case the DRX configuration is configured for a beam, the UE may apply at least one of actions in deactivated time as descried above for the beam associated with the activated DRX configuration.
[0204] In some embodiments, the applicable modes of beam DRX / DTX for DL CE can include at least one of: IDLE, RRC_INACTIVE, or RRC_CONNECTED modes. In some embodiments, one set of beam DRX / DTX can be used for all RRC modes. In some embodiments, separate beam DRX / DTX configurations can be configured for each RRC mode. In some embodiments, one set of beam DRX / DTX configuration can be configured for RRC_CONNECTED mode, while one set of beam DRX / DTX configurations can be configured for IDLE / RRC_INACTIVE mode.
[0205] Signaling to configure or update configuration of DRX / DTX
[0206] The beam DRX / DTX configuration can be provided from the NW to the UE in at least one of the below signalings: in system information, in dedicated signaling, in group signaling. Dedicated signaling may indicate that the signaling is from NW to one UE. Group signaling may indicate that the signaling is from the NW to a group of UEs. In certain embodiments, the group of UEs may only include one UE.
[0207] The message used in dedicated signaling or group signaling can be at least one RRC message. The RRC message may include at least one of: a RRC reconfiguration message, a RRC resume message, a RRC set up message, or a RRC Release message. For example, the NW can configuration or update the configuration for UE in RRC_CONNECTED mode using RRC Reconfiguration message. For example, the NW can configuration or update the configuration UE received in connected mode when moving UE to RRC_INACCTIVE / IDLE mode using RRC Release message. For example, the NW can configuration for UE when setting up RRC connections. The update of configuration may include releasing the beam DRX / DTX configuration.
[0208] In some embodiments, combination of above signaling options can be considered, e.g., one beam DTX / DRX can be provided in system information, and / or NW can update the beam DRX and / or cell DTX configuration for one or more UEs via either dedicated signaling or group signaling. In such case, the beam DRX / DTX configuration received via dedicated signaling or group signaling may overwrite the ones configured in system information.
[0209] Further UE power saving during RACH
[0210] It has been introduced in NTN that UE can delay monitoring PDCCH for next scheduling by UE-BS round trip delay (RTT) , after transmission of feedback to NW. Because the NW needs to wait for receiving feedback so that it can schedule another transmission to UE, where the transmission of the feedback in the UL and PDCCH in the downlink will takes one UE-BS RTT. Yet there are some exceptions, for example above behavior can only apply to UE when it has configured with DTX / DRX configurations. When random access based small data transmission (SDT) is initiated, a UE shall continue to monitor PDCCH after RA completion until SDT is completed. For example, when it is successfully completed after the UE is directed to RRC_IDLE (via RRCRelease) or to continue in RRC_INACTIVE (via RRCRelease or RRCReject) or to RRC_CONNECTED (via RRCResume or RRCSetup) . The new issue with current mechanism is that for some case the BS can be on-broad of satellite, in such case it is possible that during RACH procedure when NW receives scheduled Msg3, the UE contention resolution timer is close to expire while NW on-board of satellite has not yet receives RRC message (e.g., RRCSetup) or data from ground stations, in such case a possible configuration is for NW to provide only contention resolution MAC CE in Msg4 to avoid contention resolution timer from expiry. NW can schedule subsequent transmission (e.g., Msg5 containing data or RRC message) after another offset time, e.g., UE-BS RTT or a NW configured offset. In such case, UE can delay monitoring PDCCH by the offset time (e.g., UE-BS RTT or a NW configured offset time) after sending feedback of Msg4, which can save some UE power consumption.
[0211] Such enhancements are applicable when only partial function of NW is on aboard satellite (e.g., gNB on satellite while CN is at ground) , therefore they will be additional delays caused due to propagation delay between NW function entity on broad of satellite and in ground. However, such deployment is not known to UEs, which means UE cannot know when to delay the monitoring PDCCH by the offset time (e.g., UE-BS RTT or a NW configured offset time) after sending feedback of Msg4. Moreover, in case contention resolution timer is long enough, even with the deployment mentioned here, it is possible in some case NW can wait until receiving RRC message or data, and send them together with the contention resolution MAC CEs or in subsequent scheduling which depends of availability of PDSCH resource. In such case delaying monitoring PDCCH might lead to missing NW scheduled PDCCH.
[0212] Therefore, in order to achieve the gain of delaying monitoring PDCCH while not missing possible NW scheduling, a possible solution could be to make this behavior controllable by NW. When NW indicates to UE this is allowed, UE will delay monitoring PDCCH by the offset time (e.g., UE-BS RTT or a NW configured offset time) after sending feedback of Msg4 of RACH procedure. The information may provide to UE to enable this behavior can be at least one of below:
[0213] ● An indication indicating that UE can delay monitoring PDCCH by the offset time (e.g., UE-BS RTT or a NW configured offset time) after sending feedback of Msg4 of RACH procedure. For example, for RA-SDT. In some embodiments, presence of indication can means that UE can delay monitoring PDCCH by the offset time (e.g., UE-BS RTT or a NW configured offset time) after sending feedback of Msg4 of RACH, before receiving Msg5 containing RRC messages and / or data. Otherwise, the indication can be absent.
[0214] ● In some embodiments, the offset time can be UE-BS RTT. In some embodiments, the offset time is configurable by NW. In some embodiments, presence of the offset time may mean UE can delay the monitoring PDCCH by the configured offset time after sending feedback of Msg4 of RACH procedure. Otherwise, the offset time may not be present.
[0215] The indication can be provided to UE in at least one of the dedicated signaling (e.g., RRC message) , system information or MIB. Considering the use cases mentioned here. e.g., SDT, such indication can be included in system information (e.g., SIB1 / SIB19) , so that UE in idle / inactive can knows if it needs to delay monitoring PDCCH by the offset time (e.g., UE-BS RTT or a NW configured offset time) after sending feedback of Msg4 of RACH, before receiving Msg5 containing RRC messages and / or data. Taking SDT as an example, if UE receives from NW (e.g., via system information or RRC message) information indicating delay monitoring PDCCH as discussed above is enabled and if RA-SDT is initiated. After RA completion while SDT is not terminated, UE delay the monitoring of PDCCH by offset time (e.g., UE-BS RTT or a NW configured offset time) after sending feedback of Msg4 of RACH procedure, before receiving Msg5 containing RRC messages and / or data. If information indicating delay monitoring PDCCH as discussed above is not enabled, the UE may keep monitoring PDCCH after RA completion while SDT is not terminated. In some embodiments, the UE-BS RTT mentioned can be UE-gNB RTT as defined in standards.
[0216] The present application provides useful solutions for wireless communication with extensive coverage (e.g., NTN) , which can resolve the negative impacts to powering sharing among satellite beams while minimizing the impact on UE, including further power saving at UE side.
[0217] It should be understood that one or more features from the above / following implementation examples are not exclusive to the specific implementation examples, but can be combined in any manner (e.g., in any priority and / or order, concurrently or otherwise) .
[0218] FIG. 4 illustrates a flow diagram of a method 400 for flexible beam power sharing. The method 400 may be implemented using any one or more of the components and devices detailed herein in conjunction with FIGs. 1–3. In overview, the method 400 may be performed by a wireless communication device, in some embodiments. Additional, fewer, or different operations may be performed in the method 400 depending on the embodiment. At least one aspect of the operations is directed to a system, method, apparatus, or a computer-readable medium.
[0219] In some embodiments, a wireless communication device (e.g., a user equipment (UE) ) may receive at least one configuration information from a wireless communication node (e.g., a base station, or a network) . The at least one configuration information can be for downlink (DL) coverage enhancement (CE) .
[0220] In some embodiments, the at least one configuration information may include a first indication. The first indication can be used to indicate / determine whether the wireless communication device is barred from accessing a serving cell, when the wireless communication device does not support the DL coverage enhancement (CE) (e.g., a UE that does not support the DL CE) . In some embodiments, the at least one configuration information may include a second indication. The second indication can be used to indicate / determine whether the wireless communication device is barred from accessing a serving cell, when the wireless communication device supports the DL coverage enhancement (e.g., a UE that supports the DL CE) . The present application addresses the case where both old UEs and new UEs exist in a system, and how to bar UEs that cannot support a new feature (in this case, DL coverage enhancement solutions) from accessing the cell. In such cases, some bits can be used to bar UEs that cannot support DL CE, while UEs supporting the new DL CE can ignore the bits and may rely on one or more newly introduced barred bits. In some embodiments, the at least one configuration information can be received via at least one of: a system information message (e.g., master information block (MIB) , system information block 1 (SIB1) , or system information block 19 (SIB19) ) , or a radio resource control (RRC) message.
[0221] In some embodiments, the at least one configuration information may include a list of neighboring cells that are excluded from cell selection / reselection for the wireless communication device supporting the DL coverage enhancement. In some embodiments, the wireless communication device supporting the DL coverage enhancement may ignore an existing list of neighboring cells that is excluded from the cell selection / reselection for at least one user equipment (UE) not supporting the DL coverage enhancement. The wireless communication device supporting the DL coverage enhancement may determine which cells are excluded from the cell selection / reselection according to the list of neighboring cells that are excluded from the cell selection / reselection for the wireless communication device supporting the DL coverage enhancement. The present application can prevent UEs that do not support DL CE from reselecting to cells that enable DL CE. To achieve this, the network can add those cells to the existing excluded cell list. Meanwhile, UEs that support DL CE may ignore the existing list and use a new excluded cell list, specifically dedicated to UEs supporting DL CE, to determine which cells are excluded from selection / reselection.
[0222] In some embodiments, the at least one configuration information may include a third indication. The third indication can be used to indicate / determine whether a neighboring cell supports the DL coverage enhancement. The wireless communication device supporting the DL coverage enhancement may determine to prioritize cells that support the DL coverage enhancement according to the third indication. The present application can be applicable for UEs supporting DL CE. Since the third indication is newly introduced, it cannot be recognized by UEs not supporting DL CE. The third indication can be used for UE supporting DL CE to prioritize selection / reselection to cells supporting DL CE. One of the benefits is cell load balancing. Since only UEs supporting DL CE can access cells that support DL CE, prioritizing UEs that support DL CE to reselect to cells with DL CE helps preserve / save cells without DL CE for UEs that do not support DL CE. In some embodiments, the list of neighboring cells can be for at least one of: intra-frequency, inter-frequency, or inter-frequency inter radio access technology (RAT) neighboring cells.
[0223] In some embodiments, the configuration information may include information associated with at least one SSB Measurement Timing Configuration (SMTC) . The information may include at least one of: an identifier (ID) for a discontinuous transmission (DTX) or a discontinuous reception (DRX) configuration; a validity duration for a SSB measurement timing configuration; or a validity area for the SSB measurement timing configuration. The present application can associate measurement configuration with beam DTX / DRX configuration. In a cell with DL CE, a measurement periodicity associated with different synchronization signal blocks (SSBs) can have different periodicities, which can be also associated with different DTX / DRX patterns. Therefore, the identifier can be used to associate with a DRX / DTX pattern with the corresponding measurement configuration. Due to movement of satellite and beam hopping mechanism for efficient power sharing among satellite beams, the beam pattern associated the same beam can be different in different time / period or areas. In such case, validity area / time can be used to determine / provide the configuration in advance. A UE can be based on such a configuration to decide / determine whether the measurement configuration is applicable which reduces / avoids the overhead of frequent signaling update.
[0224] In some embodiments, the at least one configuration information may include beam information for a discontinuous transmission (DTX) or a discontinuous reception (DRX) . In some embodiments, the beam information may include at least one of: a list of beam indexes or a bitmap, wherein the list of beam indexes or the bitmap may indicate whether a beam is associated with the DTX or the DRX; a beam type associated with the DTX or the DRX; an identifier (ID) for the DTX or the DRX; a validity duration for the DTX or the DRX; a validity area for the DTX or the DRX; information for the wireless communication device to determine whether the DTX or the DRX is cell specific or beam specific; an ID for a measurement configuration; or an ID for a measurement gap configuration. The present application provides beam specific DTX / DRX configuration. Unlike cell specific DTX / DRX, the configuration may include beams associated with DTX / DRX. Another way to associate DRX / DTX can be to include an identifier of measurement configuration in the DRX / DTX configuration.
[0225] In some embodiments, a wireless communication node (e.g., a base station, or a network) may transmit at least one configuration information to a wireless communication device (e.g., a user equipment (UE) ) . The at least one configuration information can be for downlink (DL) coverage enhancement (CE) . In some embodiments, the first wireless communication node may receive configuration information related to DL coverage enhancement of a second wireless communication node from the second wireless communication node.
[0226] While various embodiments of the present solution have been described above, it should be understood that they have been presented by way of example only, and not by way of limitation. Likewise, the various diagrams may depict an example architectural or configuration, which are provided to enable persons of ordinary skill in the art to understand example features and functions of the present solution. Such persons would understand, however, that the solution is not restricted to the illustrated example architectures or configurations, but can be implemented using a variety of alternative architectures and configurations. Additionally, as would be understood by persons of ordinary skill in the art, one or more features of one embodiment can be combined with one or more features of another embodiment described herein. Thus, the breadth and scope of the present disclosure should not be limited by any of the above-described illustrative embodiments.
[0227] It is also understood that any reference to an element herein using a designation such as "first, " "second, " and so forth does not generally limit the quantity or order of those elements. Rather, these designations can be used herein as a convenient means of distinguishing between two or more elements or instances of an element. Thus, a reference to first and second elements does not mean that only two elements can be employed, or that the first element must precede the second element in some manner.
[0228] Additionally, a person having ordinary skill in the art would understand that information and signals can be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits and symbols, for example, which may be referenced in the above description can be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
[0229] A person of ordinary skill in the art would further appreciate that any of the various illustrative logical blocks, modules, processors, means, circuits, methods and functions described in connection with the aspects disclosed herein can be implemented by electronic hardware (e.g., a digital implementation, an analog implementation, or a combination of the two) , firmware, various forms of program or design code incorporating instructions (which can be referred to herein, for convenience, as "software" or a "software module) , or any combination of these techniques. To clearly illustrate this interchangeability of hardware, firmware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware, firmware or software, or a combination of these techniques, depends upon the particular application and design constraints imposed on the overall system. Skilled artisans can implement the described functionality in various ways for each particular application, but such implementation decisions do not cause a departure from the scope of the present disclosure.
[0230] Furthermore, a person of ordinary skill in the art would understand that various illustrative logical blocks, modules, devices, components and circuits described herein can be implemented within or performed by an integrated circuit (IC) that can include a general purpose processor, a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a field programmable gate array (FPGA) or other programmable logic device, or any combination thereof. The logical blocks, modules, and circuits can further include antennas and / or transceivers to communicate with various components within the network or within the device. A general purpose processor can be a microprocessor, but in the alternative, the processor can be any conventional processor, controller, or state machine. A processor can also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other suitable configuration to perform the functions described herein.
[0231] If implemented in software, the functions can be stored as one or more instructions or code on a computer-readable medium. Thus, the steps of a method or algorithm disclosed herein can be implemented as software stored on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that can be enabled to transfer a computer program or code from one place to another. A storage media can be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer.
[0232] In this document, the term "module" as used herein, refers to software, firmware, hardware, and any combination of these elements for performing the associated functions described herein. Additionally, for purpose of discussion, the various modules are described as discrete modules; however, as would be apparent to one of ordinary skill in the art, two or more modules may be combined to form a single module that performs the associated functions according embodiments of the present solution.
[0233] Additionally, memory or other storage, as well as communication components, may be employed in embodiments of the present solution. It will be appreciated that, for clarity purposes, the above description has described embodiments of the present solution with reference to different functional units and processors. However, it will be apparent that any suitable distribution of functionality between different functional units, processing logic elements or domains may be used without detracting from the present solution. For example, functionality illustrated to be performed by separate processing logic elements, or controllers, may be performed by the same processing logic element, or controller. Hence, references to specific functional units are only references to a suitable means for providing the described functionality, rather than indicative of a strict logical or physical structure or organization.
[0234] Various modifications to the embodiments described in this disclosure will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the scope of this disclosure. Thus, the disclosure is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the novel features and principles disclosed herein, as recited in the claims below.
Claims
1.A method for wireless communication, comprising:receiving, by a wireless communication device from a wireless communication node, configuration information,wherein the configuration information is for downlink (DL) coverage enhancement.2.A method for wireless communication, comprising:transmitting, by a first wireless communication node to a wireless communication device, configuration information,wherein the configuration information is for downlink (DL) coverage enhancement.3.The method of claim 1 or 2, wherein the configuration information includes a first indication, and the first indication is used to indicate whether the wireless communication device is barred from accessing a serving cell, when the wireless communication device does not support the DL coverage enhancement.4.The method of any one of claims 1-3, wherein the configuration information includes a second indication, and the second indication is used to indicate whether the wireless communication device is barred from accessing a serving cell, when the wireless communication device supports the DL coverage enhancement.5.The method of any one of claims 1 to 4, wherein the configuration information is received via at least one of: a system information message, or a radio resource control (RRC) message.6.The method of claim 1, wherein the configuration information includes a list of neighboring cells that are excluded from cell reselection for the wireless communication device supporting the DL coverage enhancement.7.The method of claim 6, comprising:ignoring, by the wireless communication device supporting the DL coverage enhancement, an existing list of neighboring cells that is excluded from the cell reselection for at least one user equipment (UE) not supporting the DL coverage enhancement; anddetermining, by the wireless communication device supporting the DL coverage enhancement, which cells are excluded from the cell reselection according to the list of neighboring cells that are excluded from the cell reselection for the wireless communication device supporting the DL coverage enhancement.8.The method of claim 1, wherein the configuration information includes a third indication, and the third indication is used to indicate whether a neighboring cell supports the DL coverage enhancement, and the method comprises:determining, by the wireless communication device supporting the DL coverage enhancement, to prioritize cells that support the DL coverage enhancement according to the third indication.9.The method of claims 6 or 8, wherein the list of neighboring cells is for at least one of:intra-frequency, inter-frequency, or inter-frequency inter radio access technology (RAT) neighboring cells.10.The method of claim 1, wherein the configuration information includes information associated with at least one SSB Measurement Timing Configuration (SMTC) , wherein the information includes at least one of:an identifier (ID) for a discontinuous transmission (DTX) or a discontinuous reception (DRX) configuration;a validity duration for a SSB measurement timing configuration; ora validity area for the SSB measurement timing configuration.11.The method of claim 1, wherein the configuration information includes beam information for a discontinuous transmission (DTX) or a discontinuous reception (DRX) .12.The method of claim 11, wherein the beam information includes at least one of:a list of beam indexes or a bitmap, wherein the list of beam indexes or the bitmap indicates whether a beam is associated with the DTX or the DRX;a beam type associated with the DTX or the DRX;an identifier (ID) for the DTX or the DRX;a validity duration for the DTX or the DRX;a validity area for the DTX or the DRX;information for the wireless communication device to determine whether the DTX or the DRX is cell specific or beam specific;an ID for a measurement configuration; oran ID for a measurement gap configuration.13.The method of claim 2, comprising:receiving, by the first wireless communication node from a second wireless communication node, configuration information related to DL coverage enhancement of the second wireless communication node.14.A non-transitory computer readable medium storing instructions, which when executed by at least one processor of a wireless communication device, cause the at least one processor to perform the method of claim 1 or any one of claims 3-13, or, when executed by at least one processor of a first wireless communication node, cause the at least one processor to perform the method of any one of claims 1-5 or claims 8-11.15.An apparatus comprising:at least one processor configured to perform the method of any one of claims 1-13.
Citation Information
Patent Citations
Cell barring procedure in NTN
CN117099406A
Network access method, device and system
CN118714628A
Apparatus and method for barring a UE access in a wireless communication system
WO2024096372A1