Systems and methods for network coverage enhancement
Patent Information
- Application Number
- PCT/CN2024/073502
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-01-22
- Publication Date
- 2025-07-31
Smart Images

Figure CN2024073502_31072025_PF_FP_ABST
Abstract
Description
SYSTEMS AND METHODS FOR NETWORK COVERAGE ENHANCEMENTTECHNICAL FIELD
[0001] The disclosure relates generally to wireless communications, including but not limited to systems and methods for network 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.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. A wireless communication device (e.g., UE) can send / provide / transmit / communicate / signal a message to a wireless communication node (e.g., base station (BS) , gNB, or transmission and reception point (TRP) ) , indicating a capability of the wireless communication device for performing physical uplink shared channel (PUSCH) repetition, or comprising a request for performing the PUSCH repetition. The PUSCH repetition can comprise at least one repetition of PUSCH transmission.
[0005] In some implementations, the PUSCH transmission can comprise at least one of: a PUSCH transmission scheduled by specific signaling, and / or a PUSCH transmission containing specific information. In some implementations, the specific signaling can comprise at least one of a downlink control information (DCI) signaling and / or a higher layer signaling.
[0006] In some implementations, the specific information can comprise an indication of at least one of a RRC Setup Complete, a RRC re-establishment complete, and / or a RRC Resume Complete. In some implementations, at least one of: the wireless communication device can determine a reference signal received power (RSRP) threshold for triggering the PUSCH repetition, to be: (i) same as a RSRP threshold for triggering repetition for a defined transmission, (ii) obtained by multiplying a scaling factor to the RSRP threshold for triggering repetition for the defined transmission, (iii) obtained from the RSRP threshold for triggering repetition for the defined transmission by adding or subtracting an offset, and / or (iv) a RSRP threshold configured by a higher layer signaling, and / or the wireless communication device may use some or all of RSRP thresholds for triggering the repetition of the defined transmission, and / or one or more RSRP thresholds configured by the higher layer signaling, to determine some or all of RSRP thresholds for triggering the PUSCH repetition. The defined transmission can comprise a physical random access channel (PRACH) transmission, Msg3 transmission, and / or physical uplink control channel (PUCCH) transmission for Msg4 hybrid automatic request acknowledgement (HARQ-ACK) . The Msg3 transmission can comprise a second message transmitted on an uplink shared channel (UL-SCH) containing a cell radio network temporary identifier (C-RNTI) media access control control element (MAC CE) and / or common control channel (CCCH) service data unit (SDU) , from upper layer and associated with a UE Contention Resolution Identity, as part of a random access procedure.
[0007] In some implementations, the some of the RSRP thresholds for triggering the PUSCH repetition can comprise at least one of: a highest threshold, a lowest threshold, a first threshold, and / or a second threshold of the RSRP thresholds for triggering repetition of the PRACH transmission. In some implementations, at least one of: the wireless communication device may receive / acquire / obtain a first signaling comprising an indication of at least one of: one or more scaling factors for scaling a repetition factor, one or more offsets for adjusting a repetition factor, and / or one or more repetition factors for the PUSCH repetition, from the wireless communication node. The first signaling can comprise at least one of a higher layer signaling, among other signalings.
[0008] In some implementations, at least one of: the wireless communication device can determine the repetition factor for PUSCH repetition by at least one of: determining the repetition factor for PUSCH repetition to be same as a repetition factor of the defined transmission, if only one repetition factor is configured in the first signaling, determining the repetition factor configured in the first signaling as the PUSCH repetition factor; if only one scaling factor is configured in the first signaling, determining the repetition factor for PUSCH repetition by multiplying the scaling factor configured in the first signaling to the repetition factor for the defined transmission; if only one offset is configured in the first signaling, determining the repetition factor for PUSCH repetition by adding or subtracting the offset configured in the first signaling to the repetition factor for the defined transmission; if a plurality of repetition factors are configured in the first signaling: determining, one of the plurality of repetition factors through a second signaling, as the repetition factor for PUSCH repetition; if a plurality of scaling factors are configured in the first signaling: determining, a scaling factor from the plurality of scaling factors through the second signaling, and determining the repetition factor for PUSCH repetition by multiplying the determined scaling factor to the repetition factor for the defined transmission; and / or if a plurality of offsets are configured in the first signaling: determining, an offset from the plurality of offsets through the second signaling, and determining the repetition factor for PUSCH repetition by adding or subtracting the determined offset to the repetition factor for the defined transmission. The wireless communication device can perform the PUSCH repetition according to the determined repetition factor for PUSCH repetition. The second signaling can comprise at least one of: a random access response (RAR) transmission, or a downlink control information (DCI) signaling for scheduling a Msg4, PUSCH, and / or RAR transmission.
[0009] In some implementations, each of the RSRP thresholds for triggering repetition of the defined transmission can correspond to a respective repetition factor of the PUSCH repetition. In some implementations, each repetition factor of the PUSCH repetition can correspond to a respective resource. The respective resource can comprise a respective random access channel (RACH) occasion (RO) and / or a respective preamble.
[0010] In some implementations, the wireless communication device may send the message for performing the PUSCH repetition via a first indication, when a condition is satisfied. The condition can comprise at least one of: a measured reference signal received power (RSRP) is lower than a determined RSRP threshold, multiple repetition factors are configured by a first signaling, multiple scaling factors are configured by the first signaling, multiple offsets are configured by the first signaling, and / or if a RSRP threshold for triggering the PUSCH repetition is not configured or determined. The first indication can comprise at least one of: the respective resource, a Msg3 transmission, and / or a physical uplink control channel (PUCCH) transmission for Msg4 hybrid automatic request acknowledgement (HARQ-ACK) .
[0011] In some implementations, at least one of: the wireless communication device may determine that a measured reference signal received power (RSRP) is lower than a RSRP threshold for triggering the PUSCH repetition; the wireless communication device may send, via / through a third indication responsive to the determination, the message indicating the capability of the wireless communication device for performing the PUSCH repetition, and / or comprising the request for performing the PUSCH repetition, and an indication of a repetition factor for the PUSCH repetition; and / or the wireless communication device may perform the PUSCH repetition according to the repetition factor. The third indication can comprise at least one of: a corresponding resource of respective resource, a corresponding signaling in Msg3 transmission, and / or a corresponding signaling in physical uplink control channel (PUCCH) transmission for Msg4 hybrid automatic request acknowledgement (HARQ-ACK) .
[0012] In some implementations, a plurality of repetition factors may be configured for a plurality of enhanced channel repetitions. The plurality of repetition factors can be associated with a group of random access channel (RACH) occasions (ROs) and / or preambles.
[0013] In some implementations, the wireless communication device can send a second message indicating a capability of the wireless communication device for performing at least one of the enhanced channel repetitions, through a corresponding one of the ROs or preambles, a corresponding Msg3 transmission, and / or a corresponding physical uplink control channel (PUCCH) transmission for Msg4 hybrid automatic request acknowledgement (HARQ-ACK) , when a condition is satisfied. The condition can comprise at least one of: only one reference signal received power (RSRP) threshold is configured for the plurality of enhanced channel repetitions, and the measured RSRP threshold is lower than the configured RSRP threshold, and / or no RSRP threshold has been configured. The enhanced channel repetitions can comprise repetition of at least one of: a physical random access channel (PRACH) transmission, a Msg3 transmission, a PUCCH transmission for Msg4 HARQ-ACK, and / or the PUSCH transmission.
[0014] In some implementations, if the one of the enhanced channel repetitions is PUCCH repetition, the capability for performing the PUCCH repetition can be reported in a Msg3 transmission. In some cases, if the one of the enhanced channel repetitions is PUSCH repetition, the capability for performing the PUSCH repetition can be reported in a Msg3 transmission or a PUCCH transmission for Msg4 hybrid automatic request acknowledgement (HARQ-ACK) .
[0015] At least one aspect is directed to a system, method, apparatus, or a computer-readable medium of the following. A wireless communication node can receive / acquire / obtain a message from a wireless communication device, indicating a capability of the wireless communication device for performing PUSCH repetition, and / or comprising a request for performing the PUSCH repetition. The PUSCH repetition can comprise at least one repetition of PUSCH transmission.
[0016] The systems and methods presented herein include a novel approach for network coverage enhancement (e.g., coverage enhancement in a non-terrestrial network (NTN) , or coverage enhancement in a terrestrial network (TN) ) . Specifically, the systems and methods presented herein discuss a novel solution for one or more coverage enhancement methods for at least one of Msg1 repetition, Msg3 repetition, physical uplink control channel (PUCCH) repetition for Msg4 hybrid automatic request acknowledgment (HARQ-ACK) , Msg5 (e.g., RRCSetupComplete, RRCResumeComplete, etc. ) repetition, among others. In some cases, Msg1 can include or correspond to at least one of a PRACH transmission or a preamble transmission. In some cases, Msg3 can include or be a message transmitted on an uplink shared channel (UL-SCH) including / containing a cell radio network temporary identifier (C-RNTI) media access control control element (MAC CE) and / or common control channel (CCCH) service date unit (SDU) , from upper layer and associated with a UE contention resolution identity, as part of a random access procedure. In some cases, Msg5 can include or correspond to a PUSCH transmission scheduled by DCI signaling and / or higher layer signaling, and / or containing specific information, such as RRCSetupComplete signaling, RRCResumeComplete signaling, or other types of signalings. In various implementations, the systems and methods can include sending a message for Msg5 repetition. The message can include, for instance, a capability report, request repetition, or other resources.
[0017] In various implementations, the systems and methods of the technical solution discussed herein can include receiving at least one reference signal received power (RSRP) threshold, where the RSRP may be or correspond to at least one of Msg1, Msg3, Msg5, etc. In some arrangements, the systems and methods can include repetition factors for at least one of Msg1, Msg3, Msg5, and / or PUCCH, among others. The systems and methods can perform dynamic indication (or repetition) . The systems and methods can include sending the message for Msg5 repetition via a signaling, for instance, when a condition is satisfied. The condition can include / comprise at least one of but not limited to one or more repetition numbers are configured by system information block (SIB) signaling, and / or a measured RSRP is lower / less than a configured or predetermined threshold. The systems and methods can include determining the repetition number for the Msg5 repetition according to an indication in higher layer signaling, downlink control information (DCI) and / or random access response (RAR) , among others, when at least one condition is satisfied / met. The condition can include / comprise at least one of but not limited to multiple repetition numbers are configured by system information block (SIB) signaling, the message for PUCCH repetition is sent by the wireless communication device (e.g., UE) , and / or a measured reference signal received power (RSRP) is lower than a configured threshold.BRIEF DESCRIPTION OF THE DRAWINGS
[0018] 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.
[0019] 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;
[0020] 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;
[0021] FIG. 3 illustrates an example implementation of a non-terrestrial network (NTN) , in accordance with some embodiments of the present disclosure;
[0022] FIG. 4 illustrates an example process for random access channel (RACH) and radio resource control (RRC) connection establishment, in accordance with some embodiments of the present disclosure;
[0023] FIG. 5 illustrates an example mechanism for scrambling a cyclic redundant check (CRC) with information on the number of PUCCH repetitions, in accordance with some embodiments of the present disclosure; and
[0024] FIG. 6 illustrates a flow diagram of an example method for network coverage enhancement, in accordance with an embodiment of the present disclosure.DETAILED DESCRIPTION
[0025] 1. Mobile Communication Technology and Environment
[0026] 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 FIG. 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.
[0027] 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.
[0028] 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 FIG. 1, as described above.
[0029] 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.
[0030] 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 FIG. 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.
[0031] 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.
[0032] 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.
[0033] In accordance with various embodiments, the BS 202 may be an evolved node B (eNB) , a serving eNB, a target eNB, 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.
[0034] 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.
[0035] 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.
[0036] 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.
[0037] 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.
[0038] 2. Systems and Methods for Network Coverage Enhancement
[0039] In certain communication systems, non-terrestrial networks (NTNs) can be supported or provided for network communication. The network coverage performance for the NTNs can be pertinent for operators and network communication. The NTNs can involve a relatively higher standard (e.g., for operating performance) to provide or maintain a relatively high user experience rates and / or cell edge rates, for example. In certain communication systems, physical random access channel (PRACH) coverage enhancement may be specified / indicated or configured as new radio (NR) enhancement, such as PRACH (e.g., Msg1) repetition. In certain communication systems, uplink (UL) coverage enhancements may be specified as part of NR NTN enhancements, such as PUCCH repetitions for Msg4 hybrid automatic request acknowledgement (HARQ-ACK) and / or physical uplink shared channel (PUSCH) (e.g., Msg3) repetition. However, in certain systems, PUSCH transmission scheduled by DCI format 0_0 with cyclic redundant check (CRC) scrambled / mixed by cell radio network temporary identifier (C-RNTI) (e.g., Msg5) , in some cases, may not support repetition transmission / signaling, and the payload of Msg5 (e.g., RRCSetupComplete, RRCResumeComplete, RRC re-establishment complete, etc. ) may include a value relatively greater / larger than the payload of Msg3 (e.g., the payload of Msg5 may be around 984 bits) . For example, the PUSCH transmission may be scheduled by a specific signaling (e.g., DCI format 0_0 with CRC) and / or the PUSCH transmission can contain / include specific information (e.g., C-RNTI) . In such cases, there may be a coverage bottleneck in this channel. Therefore, the systems and methods of the technical solution discussed herein can provide enhancement for Msg5 repetition. In various aspects, the systems and methods can provide at least configuration or indication of the RSRP threshold (s) with or without RSRP threshold offset (s) , repetition factor (s) or repetition scaling factor (s) with offset (s) for Msg5 repetition, a capability report of Msg5 repetition and / or repetition request for at least one of Msg1, Msg3, Msg5, and / or PUCCH for Msg4 HARQ-ACK, etc.
[0040] FIG. 3 illustrates an example structure of a transparent NTN, in accordance with some embodiments of the present disclosure. A link between a UE (e.g., a user equipment, the UE 104, the UE 204, a mobile device, a wireless communication device, a terminal, etc. ) and a satellite can be a service link. A link between a BS (e.g., a base station, the BS 102, the BS 202, a gNB, an eNB, a wireless communication node, etc. ) and a satellite can be a feeder link and can be common for all UEs within the same cell.
[0041] FIG. 4 illustrates an example process 400 for random access channel (RACH) and radio resource control (RRC) connection establishment, in accordance with some embodiments of the present disclosure. The process 400 can include or correspond to a 4-step RACH procedure. For example, in process 400, the UE 104 can send / transmit / provide at least one PRACH preamble with random access radio network temporary identifier (RA-RNTI) to the BS 102 (e.g., wireless communication node, gNB, transmission and reception point (TRP) , etc. ) if the one or more conditions for PRACH transmission is satisfied / met. The PRACH preamble may be a part of Msg1, for example. The BS 102 can send a downlink control information (DCI) scrambled with RA-RNTI value to the UE 104 (or other UEs 104 in communication with the BS 102) . The UE 104 can perform / execute or attempt detection of a physical downlink control channel (PDCCH) (e.g., DCI signaling) with the corresponding RA-RNTI within a period (e.g., time period) of random access response (RAR) -window. In cases when the UE 104 successfully decoded the PDCCH, the UE 104 can decode the physical downlink shared channel (PDSCH) carrying RAR data. After / subsequent to decoding the RAR data, the UE 104 can identify / check whether the random access preamble identifier (RAPID) in RAR matches or is the same as the RAPID assigned to the UE 104.
[0042] Subsequently, still referring to process 400, the UE 104 can transmit Msg3 PUSCH on the same serving cell to which the UE 104 sent PRACH. The UE 104 can send the Msg3 to the BS 102. If the UE 104 includes or is associated with a unique identity, such as a cell radio network temporary identifier (C-RNTI) , the C-RNTI can be carried / included in Msg3. Otherwise, the core network identity (ID) can be carried in Msg3.
[0043] If the BS 102 receives / obtains / acquires the C-RNTI that is carried in Msg3, the BS 102 can use / utilize the C-RNTI to scramble the PDCCH. Otherwise, the BS 102 may use a temporary cell radio network temporary identifier (TC-RNTI) to scramble the PDCCH. In some cases, the UE 104 may be associated with a unique identifier C-RNTI) . In such cases, the UE 140 can monitor to decode PDCCH (from the BS 102) with the C-RNTI. In response to successfully decoding the PDCCH, the UE 104 can declare / indicate / notify / signal that random access is successful (e.g., by sending a signal to the BS 102) . In some other cases, the UE may not be associated with the unique identifier C-RNTI (e.g., UE 104 without unique identity C-RNTI) . In such cases, the UE 104 can monitor to decode the PDCCH with TC-RNTI. If the PDCCH is successfully decoded, the UE 104 can decode PDSCH carrying / including medium access control control element (MAC CE) and compare the ID in the MAC CE with the ID sent in Msg3. Subsequently, the UE 104 can set / configure C-RNTI to TC-RNTI if the IDs (e.g., MAC CE ID and ID in Msg3) match or are consistent with each other.
[0044] In response to the UE 104 successfully decoding the Msg4 (e.g., contention resolution message or PDSCH) , the UE 104 can send a HARQ-ACK to the BS 102 for the carrying Msg4, for instance, to acknowledge successfully decoding the Msg4 from the BS 102. The contention resolution message may include at least one of the PDSCH transmission, DL-SCH transmission mapped to the PDSCH, etc. When the UE 104 is resuming or re-establishing an RRC connection, and the network (e.g., the BS 102) is not able to retrieve / obtain / acquire or verify the UE context, the UE 104 may receive an RRCSetup. The UE 104 can respond / reply with a RRCSetupComplete message (e.g., Msg5) .
[0045] Msg1 Repetition (e.g., preamble repetition or PRACH repetition)
[0046] In various implementations, for Msg1 repetition (e.g., preamble repetition, PRACH repetition, etc. ) , the network (e.g., BS 102) can configure / set a RSRP threshold to determine the number of PRACH transmissions, e.g., sometimes referred to as repetition factors, for a transmission scheme to differentiate between multiple PRACH transmissions with different numbers. For example, multiple PRACH transmissions with different numbers can be transmitted on different / separate random access channel (RACH) occasions (ROs) , or multiple PRACH transmissions with different numbers can be transmitted with separate preamble on one or more shared ROs. The PRACH transmissions may refer to Msg1 repetition. For multiple PRACH transmissions with the same transmission (Tx) beam, an RO group can be assumed for multiple PRACH transmissions with a separate preamble on shared ROs and / or multiple PRACH transmissions on separate ROs. One RO group can include or consist of valid RO (s) for a specific number of multiple PRACH transmissions. If one value (e.g., number of PRACH transmissions) is configured for the multiple PRACH transmissions (e.g., repetition) , the number of valid ROs in the RO group can be equal to the one value. If multiple values are configured for multiple PRACH transmissions, for each value, the number of valid ROs in the RO group can be equal to the corresponding number of multiple PRACH transmissions.
[0047] Msg3 Repetition
[0048] In some implementations, for Msg3 repetition, the network (e.g., BS 102) can configure the RSRP threshold used to determine whether to request at least one of Msg3 repetition (e.g., configured by RSRP ThresholdMsg3) , set (s) of random access resources (e.g., preamble) with or without msg3-Repetitions, a repetition factor (e.g., if configured, indicated by numberOfMsg3 RepetitionsList) , RACH occasions, and / or other messages. The threshold range can include {0... 127} .
[0049] In some cases, if the bandwidth part (BWP) selected for the random access procedure is configured with one or more sets of random access resources with msg3-Repetitions set / configured to true and one or more sets of random access resources without msg3-Repetitions set to true and the RSRP of the downlink pathloss reference is less / lower than rsrp-ThresholdMsg3; or if the BWP selected for the random access procedure is configured with the one or more sets of random access resources with msg3-Repetitions set to true, the UE 104 can determine that Msg3 repetition is applicable for the current random access procedure. In such cases, the UE 104 can send a specific preamble (e.g., preamble used to trigger a repetition) at the configured PRACH transmission resource to the BS 102.
[0050] When the specific preamble is received / detected by the network (e.g., the BS 102) , the BS 102 can determine that the corresponding UE 104 sends a Msg3 repetition request. For instance, the specific preamble can indicate or be associated with the Msg3 repetition request. The BS 102 can determine / decide whether to schedule the Msg3 repeat transmission (e.g., repetition) and indicate the number of repetitions (which can be 1) according to or by using the 2 most significant bits (MSBs) of the modulation and coding scheme (MCS) information field of the RAR UL grant. The remaining bits of the MCS field may be used to indicate the MCS index, among other indications or information. The UE 104 can obtain the Msg3 transmission configuration, e.g., information for Msg3 transmission, by decoding the DCI (e.g., used for) scheduling RAR and / or decoding RAR message, and performing Msg3 transmission according to the corresponding configuration, for example.
[0051] PUCCH Repetition for Msg4 HARQ-ACK
[0052] For PUCCH repetition for Msg4 HARQ-ACK, the network (e.g., BS 102) can configure the RSRP threshold used to determine whether to report at least one of PUCCH repetition for Msg4 HARQ-ACK, the repetition factor, and / or resource information, among others. The threshold range can include or be {0... 127} . The repetition factor can include at least one of {1, 2, 4, 8} , as an example.
[0053] If an RSRP threshold is configured / set, the UE 104 can measure whether the RSRP of the downlink signal is lower / less than the configured RSRP threshold, e.g., according to a comparison between the RSRP to the configured threshold. If the RSRP is lower than the threshold, the UE 104 can report the capability of PUCCH repetition in the Msg3 message to the BS 102. In some cases, if the RSRP threshold is not configured, the UE 104 can report PUCCH repetition capability in the Msg3 message to the BS 102.
[0054] In some cases, when detecting Msg3 on the network side, at least one of the following rules / criteria / conditions can be applied or followed to determine / decide whether to perform PUCCH repetition:
[0055] ● If one repetition factor is configured via system information block (SIB) signaling (or other types of signalings) , the UE 104 can perform PUCCH repetition transmission according to the configured repetition factor.
[0056] ● If multiple repetition factors are configured via the SIB signaling (or other types of signalings) , the BS 102 can decide whether to schedule PUCCH repetition and indicate the number of repeated transmissions by the 2 bits of the downlink assignment index (DAI) information field in the DCI scheduling Msg4. Subsequently, the UE 104 can decode the DCI to obtain the PUCCH transmission configuration and perform the PUCCH transmission according to the corresponding configuration.
[0057] In various configurations, to enhance the coverage performance of Msg5, the systems and methods of the technical solution can utilize, execute, perform, incorporate, or apply at least one of the example methods or implementations discussed herein.
[0058] Example Implementation 1: Msg5 Repetition Configuration Coupled with Previous Repetition
[0059] In some implementations, if at least one previous signal has been configured or utilized for repetition, such as Msg1 (e.g., preamble, PRACH, etc. ) repetition (e.g., preamble repetition, PRACH repetition, etc. ) , Msg3 repetition, and / or PUCCH repetition for Msg4 HARQ-ACK, the RSRP threshold can be reused / repurposed / reutilized. The repetition factor can be reused with the repetition factor of Msg1, Msg3, and / or PUCCH for Msg4 HARQ-ACK, and / or a scaling repetition factor of the repetition factor for Msg1, Msg3, and / or PUCCH for Msg4 HARQ-ACK. At least one of but not limited to the following example configurations can be considered or applied for reusing the RSRP threshold and / or the repetition factor.
[0060] Example Configuration 1 of Example Implementation 1
[0061] In some configurations, the RSRP threshold (s) for Msg1 repetition can be reused / repurposed as the RSRP threshold (s) for Msg5. Each RSRP threshold may correspond to a respective repetition factor for Msg1. Each repetition factor may correspond to a specific resource (e.g., sometimes referred to as specific ROs or specific preambles on shared RO) .
[0062] a) In some cases, one or more RSRP thresholds may be configured. If the RSRP threshold (s) is configured, the UE 104 can measure or determine whether the RSRP of the downlink signal is lower / less than the configured threshold (s) . If the RSRP is lower than the threshold (s) , the UE 104 can perform Msg1 repetition transmission according to the configured repetition factor (e.g., to determine the repetition factor for PUSCH repetition) corresponding to the specific resource and report the capability of Msg5 repetition and / or implicitly request Msg5 repetition through / via specific resource, for the repetition factor of Msg5.
[0063] i. The repetition factor for Msg5 (e.g., the PUSCH repetition factor) may be the same as the repetition factor of Msg1 transmission (e.g., the repetition factor of the defined transmission) or the repetition factor configured in a first signaling. For example, if one repetition factor is configured in the first signaling (e.g., higher layer signaling) or provided in the defined transmission, the repetition factor configured in the first signaling or the repetition factor of the defined transmission may be determined as the PUSCH repetition factor. The UE 104 can perform Msg5 transmission repetition according to the repetition factor.
[0064] ii. The repetition factor (s) for Msg5 may be at least one scaling factor for multiplying the repetition factor (s) for Msg1, and / or at least one offset applied to the repetition factor (s) for Msg1 (e.g., the repetition factor plus or minus the at least one offset) . For example, the UE 104 can receive a first signaling from the BS 102 including / comprising an indication of at least one of: one or more scaling factors for scaling a repetition factor, one or more offsets for adjusting a repetition factor, and / or one or more repetition factors for the PUSCH repetition (e.g., Msg5 repetition) . The at least one scaling factor or offset can include or correspond to one or more values configured by a higher layer signaling (e.g., SIB signaling) or other types of signalings. The higher layer signaling can be the first signaling received by the UE 104 from the BS 102.
[0065] 1. If one scaling factor or offset is configured, such as in the first signaling, the repetition factor may be determined for Msg5 repetition (e.g., PUSCH repetition) by multiplying the scaling factor configured in the first signaling to the repetition factor of Msg1 transmission (e.g., defined transmission) or by adding or subtracting the offset configured in the first signaling to the repetition factor for the Msg1 transmission (e.g., the repetition factor plus or minus the configured offset) . The UE 104 can perform the Msg5 repetition transmission according to the repetition factor.
[0066] 2. If multiple scaling factors or offsets are configured (e.g., in the first signaling) , the specific scaling factor or offset can be indicated in a DCI signaling for scheduling at least one of RAR, Msg4, Msg5, and / or PUSCH or random access response (RAR) transmission. At least one of the DCI signaling for scheduling at least one of RAR, Msg4, Msg5, and / or PUSCH or RAR transmission can correspond to or be a part of a second signaling. Then, the repetition factor of Msg5 can be the multiplication of the repetition factor of Msg1 transmission by the indicated scaling factor or plus (or minus) the indicated offset. For example, the repetition factor can be determined for the PUSCH repetition by multiplying the determined scaling factor or the determined offset by the repetition factor for the defined transmission (e.g., Msg1 transmission) . The UE 104 can perform Msg5 repetition transmission according to the repetition factor.
[0067] iii. The repetition factor of Msg5 can include or correspond to multiple reused / redefined repetition factors configured via higher layer signaling (e.g., SIB signaling or the first signaling) . Each repetition factor can correspond to each RSRP threshold or is indicated in a DCI for scheduling RAR, Msg4, Msg5 or RAR. UE performs Msg5 repetition transmission according to the repetition factor corresponding to the RSRP threshold or the repetition factor indicated in the DCI signaling or other types of signalings.
[0068] b) If the RSRP threshold (s) for triggering the Msg5 repetition is not configured, the UE 104 may report / send / provide a message indicating the capability the UE 104 for performing the Msg5 repetition and / or including a request for performing the Msg5 repetition through / via a respective specific resource (e.g., specific ROs, or specific preamble, etc. ) . The repetition factor of Msg5 can include or be one or more redefined repetition factors.
[0069] i. If one repetition factor is configured, the UE 104 can perform Msg5 repetition transmission (e.g., sometimes referred to as Msg5 transmission repetition procedure) according to the configured repetition factor.
[0070] ii. If multiple repetition factors are configured, at least one of the following can be performed or applied:
[0071] 1. Associate each repetition factor with at least one specific resource. The UE 104 can perform the Msg5 repetition transmission according to the repetition factor indicated by the specific resource.
[0072] 2. The specific repetition factor can be indicated in DCI scheduling at least one of RAR, Msg4, Msg5, and / or RAR transmission, the UE 104 can perform the Msg5 repetition transmission according to the repetition factor indicated by the DCI signaling and / or RAR transmission, among other types of signalings or transmissions.
[0073] Example Configuration 2 of Example Implementation 1
[0074] In some configurations, the one or more thresholds for Msg1 repetition can be reused plus (or with adding) one or more offsets as the RSRP threshold (s) for Msg5 repetition. For example, if one offset is configured, the Msg5 RSRP threshold (s) can correspond to or equal to the Msg1 RSRP threshold (s) plus or minus the offset. If multiple offsets are configured, the Msg5 RSRP threshold (s) can be determined as the Msg1 RSRP threshold (s) plus or minus the corresponding offset (s) , such as a respective Msg1 RSRP threshold (s) sequentially plus or minus the corresponding offset (s) . The resource can implicitly represent the repetition indication, such as separate ROs corresponding to each repetition factor (s) or separate preamble corresponding to each repetition factor (s) . For instance, the each repetition factor of the Msg 5 repetition can correspond to a respective resource. The resource can include at least one of but not limited to a respective RO or a respective preamble. The resource can be fragmented to represent at least one or both of the Msg1 repetition with a configured repetition factor and / or Msg5 repetition.
[0075] a) In some implementations, if at least one RSRP threshold is configured, at least one of the following can apply:
[0076] i. The UE 104 can measure, determine, or identify whether the RSRP of the downlink signal is lower than the predetermined or configured threshold_A (e.g., RSRP threshold) . If the RSRP is lower than the threshold_A, the UE 104 can perform Msg1 repetition transmission according to the configured repetition factor corresponding to the specific resource and report the capability of Msg5 repetition and / or request Msg5 repetition via / through at least one specific resource (e.g., RO or preamble) . The repetition factor of Msg5 may be similar to at least one of the repetition factors discussed herein, such as in a) -i, ii, and / or iii of the example configuration 1 of example implementation 1.
[0077] ii. The UE 104 can measure whether the RSRP of the downlink signal is lower / less than the configured threshold_B. If the RSRP is lower than the threshold_B, the UE 104 can report the capability of Msg5 repetition and / or request Msg5 repetition via / through the specific resource, e.g., without performing the Msg1 repetition transmission. The repetition factor of Msg5 can be similar to at least a) -i, ii, and / or iii of the example configuration 1 of example implementation 1, for example.
[0078] iii. The UE 104 can measure whether the RSRP of the downlink signal is lower than the configured threshold_C. if the RSRP is lower than the threshold_C, the UE 104 can perform Msg1 repetition transmission according to the configured repetition factor corresponding to the specific resource. In such cases, the Msg5 repetition may not be performed / executed / initiated.
[0079] b) If the RSRP threshold (s) and / or the offset (s) are not configured, the UE 104 can report the capability of Msg5 repetition and / or request Msg5 repetition via the specific resource (e.g., specific ROs, specific preamble, etc. ) . The repetition factor of Msg5 can be one or more redefined / repurposed / reused repetition factors. For example, the repetition factor of Msg5 may be similar to b) -i and / or ii of the example configuration 1 of example implementation 1.
[0080] Example Configuration 3 of Example Implementation 1
[0081] In some configurations, certain threshold (s) for Msg1 repetition may be reused. For example, the highest RSRP threshold, the lowest RSRP threshold, the first RSRP threshold, and / or the second RSRP threshold, etc., may be reused as the RSRP threshold (s) for Msg5 repetition. The highest RSRP threshold, the lowest RSRP threshold, the first RSRP threshold, and / or the second RSRP threshold, etc., may correspond to or be associated with RSRP thresholds for triggering Msg1 repetition.
[0082] a) In some cases, if the RSRP threshold (s) is configured / set / provided, the UE 104 may measure or determine whether the RSRP of the downlink signal is lower than the configured threshold (s) for Msg5 (e.g., by way of comparison) . If the RSRP is lower than the threshold (s) , the UE 104 can perform the Msg1 repetition transmission according to the configured repetition factor corresponding to the specific resource and responsively report the capability of Msg5 repetition and / or request Msg5 repetition via the specific resource. The repetition factor of Msg5 may be the same with the repetition factors from a) -i, ii, and / or iii of the example configuration 1 of example implementation 1, for example.
[0083] b) If the RSRP threshold (s) is not configured, the UE 104 can report the capability of Msg5 repetition and / or request Msg5 repetition via the specific resource (e.g., specific ROs, specific preamble, etc. ) . The repetition factor of Msg5 can be one or multiple redefined / reused / repurposed repetition factors. For example, the repetition factor of Msg5 may be similar to or the same as those discussed in, but not limited to, b) -i and / or ii of the example configuration 1 of example implementation 1.
[0084] Example Configuration 4 of Example Implementation 1
[0085] In some configurations, certain threshold (s) for Msg1 repetition, including or plus an offset, can be reused / repurposed / redefined as the RSRP threshold (s) for Msg5 repetition. For example, one or more thresholds for Msg1 repetition, such as the highest RSRP threshold, the lowest RSRP threshold, the first RSRP threshold, and / or the second RSRP threshold, etc., added with an offset, can be used as the one or more RSRP thresholds for Msg5 repetition. The resource may implicitly represent the repetition indication, such as separate ROs corresponding to each repetition factor (s) , separate preambles corresponding to each repetition factor (s) , etc., can be fragmented to represent one or both of the Msg1 repetition with configured repetition factor and / or the Msg5 repetition.
[0086] a) In some cases, if the RSRP threshold (s) is configured, the UE 104 can measure whether the RSRP of the downlink signal is lower than the configured threshold (s) . If the RSRP is lower than the threshold (s) , the UE 104 can perform Msg1 repetition transmission according to the configured repetition factor corresponding to the specific resource and report the capability of Msg5 repetition and / or request Msg5 repetition via the specific resource. The repetition factor of Msg5 can correspond to or be similar to the repetition factor as described in conjunction with but not limited to a) -i, ii, and / or iii of the example configuration 1 of example implementation 1, for example.
[0087] b) If the RSRP threshold (s) and / or the offset (s) are not configured, the UE 104 can report the capability of Msg5 repetition and / or request Msg5 repetition via / through the specific resource (e.g., specific ROs, or specific preamble, etc. ) . The repetition factor of Msg5 can be one or multiple redefined repetition factors. The repetition factor of Msg5 can be similarly described as in b) -i and / or ii of the example configuration 1 of example implementation 1, among others, for example.
[0088] Example Configuration 5 of Example Implementation 1
[0089] In some configurations, the RSRP threshold for Msg3 repetition can be reused as the RSRP threshold for Msg5, such as similarly to the reuse of the RSRP threshold for Msg1 repetition as the RSRP threshold for Msg5, for example. For example, the resource assuming repetition, such as set (s) of random access resources with msg3-Repetitions, can be reused.
[0090] a) In some cases, if the BWP selected for the random access procedure is configured with the set (s) of random access resources with msg3-Repetitions set to true and / or the set (s) of random access resources without msg3-Repetitions set to true, and the RSRP of the downlink pathloss reference is less than rsrp-ThresholdMsg3; and / or if the BWP selected for random access procedure is configured with the set (s) of random access resources with msg3-Repetitions set to true, in such cases, the UE 104 can consider or assume that the Msg5 repetition is applicable. In this case, responsively, the UE 104 can send a specific preamble at the configured PRACH transmission resource. For the repetition factor for Msg5, at least one of the following can be considered:
[0091] a. The repetition factor for Msg5 can be the same as the repetition factor of Msg3 transmission, which may be indicated in RAR transmission (or PUSCH transmission) , in some cases. The PUSCH and / or RAR transmission can be a part of the second signaling. The UE 104 can perform Msg5 repetition transmission according to the repetition factor for Msg3.
[0092] b. The repetition factor for Msg5 can be obtained by multiplying the scaling factor (s) to the repetition factor (s) for Msg3 or by adding or subtracting the repetition factor (s) for Msg3 by an offset (s) . The scaling factor (s) and / or offset (s) can be one or more values configured by the higher layer signaling (e.g., SIB signaling or the first signaling) .
[0093] i. If one scaling factor and / or offset is configured, the repetition factor of Msg5 can be obtained by multiplying the repetition factor of Msg3 transmission to the configured scaling factor or adding or subtracting the repetition factor of Msg3 by the configured offset. The UE 104 can perform Msg5 repetition transmission according to or based on the repetition factor.
[0094] ii. If multiple scaling factors and / or offsets is / are configured, the specific scaling factor and / or offset can be indicated in the DCI scheduling RAR, Msg4, Msg5, and / or RAR (or PUSCH) transmission. Then or subsequently, the repetition factor of Msg5 can be obtained by multiplying the repetition factor of Msg3 transmission by the indicated scaling factor and / or adding the indicated offset to the repetition factor of Msg3. The UE 104 can perform Msg5 repetition transmission according to the repetition factor.
[0095] c. The repetition factor of Msg5 can include or be one or multiple redefined repetition factors via the higher layer signaling (e.g., SIB signaling) , among other signalings.
[0096] i. For example, if one repetition factor is configured, the UE 104 can perform Msg5 repetition transmission according to the configured repetition factor.
[0097] ii. In another example, if multiple repetition factors are configured, the repetition factor for Msg5 can be indicated in the DCI signaling for scheduling RAR, Msg4, Msg5, and / or RAR transmission, among other transmissions or messages. The UE 104 can perform Msg5 repetition transmission according to the indicated repetition factor.
[0098] b) If the BWP selected for random access procedure is configured with the set (s) of random access resources with msg3-Repetitions set to true and the set (s) of random access resources without msg3-Repetitions set to true, but the RSRP threshold is not configured: the UE 104 can determine (or assume) that the Msg5 repetition is applicable and send / transmit / provide / communicate / signal a specific preamble at the configured PRACH transmission resource. To obtain the repetition factor for Msg5, at least one of the following can be applied or considered:
[0099] a. The repetition factor of Msg5 can be one or more redefined / repurposed / reused repetition factors via the higher layer signaling (e.g., SIB signaling, etc. ) .
[0100] i. If one repetition factor is configured, the UE 104 can perform Msg5 repetition transmission according to the configured repetition factor.
[0101] ii. If multiple repetition factors are configured, the repetition factor for Msg5 can be indicated in the DCI signaling for scheduling RAR, Msg4, Msg5, and / or RAR transmission, etc. The UE 104 can perform Msg5 repetition transmission according to the indicated repetition factor.
[0102] Example Configuration 6 of Example Implementation 1
[0103] In some configurations, the threshold for Msg3 repetition can be reused / repurposed and added with at least one offset to obtain / determine the RSRP threshold for Msg5 repetition. The resource representing the request repetition indication, such as set (s) of random access resources with msg3-Repetitions, can be fragmented to represent the Msg3 repetition, the Msg5 repetition (e.g., separate sets of resources used for Msg3 repetition and Msg5 repetition, respectively) , or both the Msg3 repetition and Msg5 repetition, for example.
[0104] a) If the BWP selected for random access procedure is configured with set (s) of random access resources with msg3-Repetitions set to true, set (s) of random access resources without msg3-Repetitions set to true, set (s) of random access resources with msg5-repetitions set to true, and the RSRP of the downlink pathloss reference is less than rsrp-ThresholdMsg_A, the UE 104 can determine that Msg3 and / or Msg5 repetition is applicable. In response to the determination, the UE 104 can send a specific preamble at the configured PRACH transmission resource. In some cases, the repetition factor for Msg5 may be the same as the repetition factor as described in conjunction with a) -a, b, and / or c of the example configuration 5 of example implementation 1, for example.
[0105] b) If the BWP selected for random access procedure is configured with the set (s) of random access resources with msg3-Repetitions set to true, set (s) of random access resources without msg3-Repetitions set to true, set (s) of random access resources with msg5-repetitions set to true, and the RSRP of the downlink pathloss reference is less than rsrp-ThresholdMsg_B; or if the BWP selected for random access procedure is configured with the set (s) of random access resources with msg5-Repetitions set to true: the UE 104 can determine that the Msg5 repetition is applicable and send a specific preamble at the configured PRACH transmission resource. The repetition factor for Msg5 may correspond to or be described in conjunction with a) -a, b, and / or c of the example configuration 5 of example implementation 1, for example.
[0106] c) If the BWP selected for random access procedure is configured with the set (s) of random access resources with msg3-Repetitions set to true, set (s) of random access resources without msg3-Repetitions set to true, set (s) of random access resources with msg5-Repetitions set to true, and the RSRP of the downlink pathloss reference is less than rsrp-ThresholdMsg_C; or if the BWP selected for random access procedure is configured with the set (s) of random access resources with msg3-Repetitions set to true, the UE 104 can determine that the Msg3 repetition is applicable and send a specific preamble at the configured PRACH transmission resource. In such cases, the Msg5 repetition may not be performed / executed / initiated.
[0107] Example Configuration 7 of Example Implementation 1
[0108] In some configurations, the RSRP threshold for PUCCH repetition for Msg4 HARQ-ACK can be reused / repurposed as the RSRP threshold for Msg5.
[0109] a) If the RSRP is configured, the UE 104 can measure or determine the RSRP of the downlink signal. If the RSRP is lower than the configured RSRP threshold, the UE 104 can report the capability of Msg5 repetition and / or request the Msg5 repetition via at least one of the following methods, techniques, or implementations.
[0110] a. The repetition capability and / or the request report for Msg5 can be provided / signaled similarly to the capability report of PUCCH (e.g., included in the same report) for Msg4 HARQ-ACK. For example, the UE 104 can send a message indicating the capability of the UE 104 for performing the Msg5 repetition and / or including a request for performing the Msg5 repetition with a capability report of the PUCCH transmission for Msg4 HARQ-ACK. The UE 104 can report the capability of at least one of the Msg3 and / or Msg5 repetition and / or request the Msg5 repetition through / via the higher layer signaling (e.g., the first signaling) in Msg3, for the repetition factor.
[0111] i. If one repetition factor is configured, the UE 104 may perform Msg5 repetition transmission according to the configured repetition factor.
[0112] ii. If multiple repetition factors are configured via higher layer signaling (e.g., SIB signaling, etc. ) :
[0113] 1. The repetition factor for Msg5 can be the same as the repetition factor of PUCCH for Msg4 HARQ-ACK, which may be indicated by the 2 bits downlink assignment index (DAI) field in the DCI signaling for scheduling the Msg4. The UE 104 can perform Msg5 repetition transmission according to the repetition factor.
[0114] 2. The BS 102 may determine / decide whether to schedule Msg5 repetition and indicate the number of repeated transmissions in the DCI signaling used for scheduling the Msg4 and / or the Msg5.
[0115] iii. The repetition factor (s) for Msg5 can correspond to or equal to a scaling factor (s) multiplied by the repetition factor (s) for PUCCH for Msg4 HARQ-ACK and / or an offset (s) plus or minus the repetition factor (s) for PUCCH. The scaling factor (s) and / or offset (s) can be one or more values configured by the higher layer signaling (e.g., SIB signaling) , or other types of signalings.
[0116] 1. If one scaling factor and / or one offset is configured, the repetition factor of Msg5 can be obtained by multiplying the repetition factor of PUCCH transmission by the configured scaling factor, or adding or subtracting the configured offset to the repetition factor. In response to obtaining the repetition factor, the UE 104 can perform Msg5 repetition transmission according to the repetition factor.
[0117] 2. If multiple scaling factors and / or offsets are configured, the specific scaling factor and / or offset can be indicated in the DCI signaling used for scheduling Msg4 and / or Msg5. The repetition factor of Msg5 can then be obtained as the product of the repetition factor of PUCCH transmission multiplied by the indicated scaling factor or the indicated offset plus or minus the repetition factor. The UE 104 can perform Msg5 repetition transmission according to the repetition factor.
[0118] iv. The repetition factor of Msg5 can include or correspond to multiple redefined / reused repetition factors indicated via the higher layer signaling (e.g., SIB signaling, etc. ) , which can be indicated in DCI scheduling Msg4, Msg5, etc. The UE 104 can perform Msg5 repetition transmission according to the indicated repetition factor.
[0119] b. The repetition capability and / or the request report for Msg5 can be different from the capability report of PUCCH for Msg4 HARQ-ACK, for example,
[0120] i. The UE 104 can report the capability of Msg5 repetition and / or request the Msg5 repetition via the specific resource (e.g., specific ROs, specific preamble, etc. ) , for the repetition factor.
[0121] 1. If one repetition factor is configured, the UE 104 can perform Msg5 repetition transmission according to the configured repetition factor.
[0122] 2. If multiple repetition factors are configured, such as via the higher layer signaling (e.g., SIB signaling, etc. ) :
[0123] a. The repetition factor for Msg5 can be the same as the repetition factor of PUCCH for Msg4 HARQ-ACK, which may be indicated by the 2 bits DAI field in the DCI signaling for scheduling the Msg4. The UE 104 can perform Msg5 repetition transmission according to the repetition factor.
[0124] b. The BS 102 can determine / decide whether to schedule Msg5 repetition and / or indicate the number of repeated transmissions in the DCI signaling scheduling RAR, Msg4, Msg5, and / or RAR transmission (or PUSCH transmission) , among others. The UE 104 can perform Msg5 repetition transmission according to the repetition factor.
[0125] 3. In some cases, the repetition factor (s) for Msg5 can be the scaling factor (s) multiplied by the repetition factor (s) for PUCCH for Msg4 HARQ-ACK and / or an offset (s) plus or minus the repetition factor (s) for PUCCH. The scaling factor (s) and / or offset (s) can be one or more values configured by the higher layer signaling (e.g., SIB signaling, etc. ) .
[0126] a. If one scaling factor and / or offset is configured, the repetition factor of Msg5 can be the product of multiplying the repetition factor of PUCCH transmission by the configured scaling factor or the result of adding or subtracting (e.g., plus or minus) the configured offset to the repetition factor of the PUCCH transmission. The UE 104 can perform Msg5 repetition transmission according to the repetition factor.
[0127] b. If multiple scaling factors and / or offsets are configured, the specific scaling factor and / or offset can be indicated in DCI signaling for scheduling RAR, Msg4, Msg5, and / or RAR transmission, among other messages or transmission. In this case, the repetition factor of Msg5 can be obtained as the repetition factor of PUCCH transmission multiplied by the indicated scaling factor and / or the indicated offset plus or minus the repetition factor of the PUCCH transmission. The UE 104 can perform Msg5 repetition transmission according to the repetition factor.
[0128] 4. The repetition factor of Msg5 can be multiple redefined / repurposed / reused repetition factors indicated or configured via the higher layer signaling (e.g., SIB signaling, etc. ) , which can be indicated in the DCI (e.g., the second signaling) scheduling RAR, Msg4, Msg5, and / or RAR transmission, etc. The UE 104 can perform Msg5 repetition transmission according to the indicated repetition factor.
[0129] ii. The UE 104 can report the capability of Msg5 repetition and / or request the Msg5 repetition in Msg3. In various cases, the repetition factor may be determined or obtained similarly to the repetition factor discussed in conjunction with but not limited to a) -a-i, ii, iii, and / or iv of the example configuration 7 of example implementation 1, for example.
[0130] iii. The UE 104 can report the capability of Msg5 repetition and / or request the Msg5 repetition in PUCCH for Msg4 HARQ-ACK, for the repetition factor.
[0131] 1. If one repetition factor is configured, the UE 104 can perform Msg5 repetition transmission according to the configured repetition factor.
[0132] 2. If multiple repetition factors are configured via the higher layer signaling (e.g., SIB signaling, etc. ) .
[0133] a. The repetition factor for Msg5 can be similar to or correspond to the repetition factor of PUCCH for Msg4 HARQ-ACK indicated by the 2 bits DAI field in the DCI scheduling Msg4. The UE 104 can perform / execute Msg5 repetition transmission according to the repetition factor.
[0134] b. The BS 102 can determine / decide whether to schedule Msg5 repetition and / or indicate the number of repeated transmissions in the DCI scheduling Msg5. The UE 104 can perform Msg5 repetition transmission according to the indicated repetition factor.
[0135] 3. The repetition factor (s) for Msg5 can include or correspond to a scaling factor (s) multiplied by the repetition factor (s) for PUCCH for Msg4 HARQ-ACK and / or an offset (s) plus or minus the repetition factor (s) for PUCCH. The scaling factor (s) and / or offset (s) can be one or more values configured by the higher layer signaling (e.g., SIB signaling) , among other signalings.
[0136] a. If one scaling factor and / or offset is configured, the repetition factor of Msg5 can be the multiplication of the repetition factor of PUCCH transmission by the configured scaling factor or the addition or subtraction of the configured offset and the repetition factor. The UE 104 can perform Msg5 repetition transmission according to the repetition factor.
[0137] b. If multiple scaling factors and / or offsets are configured, the specific scaling factor and / or offset can be indicated in DCI scheduling Msg5 and / or RAR transmission, etc. In such cases, the repetition factor of Msg5 can be obtained by multiplying the repetition factor of PUCCH transmission by the indicated scaling factor or adding or subtracting the repetition factor of PUCCH transmission by the indicated offset. The UE 104 can perform Msg5 repetition transmission according to the repetition factor resulting from the computation.
[0138] 4. The repetition factor of Msg5 can be multiple redefined / repurposed / reused repetition factors via the higher layer signaling (e.g., SIB signaling, etc. ) , which can be indicated in the DCI scheduling Msg5 and / or RAR transmission, among other signalings or messages. The UE 104 can perform Msg5 repetition transmission according to the indicated repetition factor.
[0139] b) If the RSRP threshold is not configured, the UE 104 can report / provide / inform the capability of Msg5 repetition and / or request the Msg5 repetition via at least one method or operation described in conjunction with but not limited to a) -a and / or b of the example configuration 7 of example implementation 1, for example.
[0140] Example Configuration 8 of Example Implementation 1
[0141] In some configurations, the threshold for PUCCH repetition for Msg4 HARQ-ACK can be reused / repurposed, with an addition of an offset, as the RSRP threshold for Msg5 repetition.
[0142] a) For example, if the RSRP is configured, the UE 104 can measure / determine the RSRP of the downlink signal. If the RSRP is lower than the configured RSRP threshold, the UE 104 can report the capability of Msg5 repetition and / or request the Msg5 repetition via / through at least one method or operation as described in conjunction with but not limited to a) -b-i, ii, and / or iii of the example configuration 7 of example implementation 1, for example.
[0143] b) If the RSRP threshold and / or the offset is not configured, the UE 104 can report / provide the capability of Msg5 repetition and / or request the Msg5 repetition via at least one method or operation as described in conjunction with but not limited to a) -a and / or b of the example configuration 7 of example implementation 1, for example.
[0144] The dynamic repetition scaling factor, the offsets, and / or the repetition factor in DCI for scheduling RAR, Msg4, Msg5, RAR transmission, etc., can be indicated or described as at least one of the following.
[0145] 1) Reusing existing bit field in the DCI (e.g., scrambled by random access radio network temporary identifier (RA-RNTI) , cell radio network temporary identifier (C-RNTI) or temporary cell radio network temporary identifier (TC-RNTI) , etc. ) or other DCI scheduling UL and / or DL transmission to indicate the repetition scaling factor or repetition factor for Msg5 repetition, such as at least one of the following non-limiting examples:
[0146] a. Modulation and coding scheme (MCS) field: the 2 bits in the MCS field can be the highest two bits or the lowest two bits.
[0147] b. PUCCH resource indicator field: 4 states may be indicated in the PUCCH resource indicator field.
[0148] c. HARQ process number field: 4 states may be indicated in the HARQ process number field.
[0149] d. Physical downlink shared channel (PDSCH) -to-HARQ_feedback timing indicator field: 4 states may be indicated in the PDSCH-to-HARQ_feedback timing indicator field.
[0150] e. Reserved bits field: 2 bits can be in the reserved bits field.
[0151] 2) New defined / configured field:
[0152] a. 2 bits in the DCI used for scheduling RAR, Msg4, and / or Msg5, etc.
[0153] 3) CRC scrambling of DCI scheduling the RAR, Msg4, and / or Msg5. The mechanism for scrambling the CRC can be described in conjunction with at least FIG. 5. For example, FIG. 5 illustrates an example mechanism 500 for scrambling a cyclic redundant check (CRC) with information on the number of PUCCH repetitions, in accordance with some embodiments of the present disclosure. As shown, in part, in FIG. 5:
[0154] a. 2 CRC bits other than the bits scrambled by TC-RNTI and / or C-RNTI can be used for the dynamic indication to indicate the repetition factor for PUCCH repetition on at least one common PUCCH resource.
[0155] i. The first 2 MSB bits of the CRC may be scrambled with the information content on the number of PUCCH repetitions. The UE 104 can retrieve / acquire / obtain the information via descrambling, such as in a similar manner or technique as for the TC-RNTI.
[0156] For the above indication, the mapping rules for 2 bits can be described or configured as, for example: the 1st, 2nd, 3rd, and 4th configured repetition factors that can be mapped to “00” , “01” , “10” , and “11” of the 2 bits field, respectively. In cases when the 3rd and / or the 4th repetition factors and / or repetition scaling factor is / are not configured, the corresponding codepoint (s) (e.g., “10” and / or “11” ) may not be used, such as described in conjunction with at least one of but not limited to example Table 1 and / or example Table 3. The mapping rules for 4 states can be described as, for example: the 1st, 2nd, 3rd, and 4th configured repetition factors that can be mapped to “state 1” , “state 2” , “state 3” , “state 4” of the 4 states indicated in PUCCH resource indicator field, HARQ process number field, and PDSCH-to-HARQ_feedback timing indicator field, respectively. When the 3rd and / or the 4th repetition factors and / or repetition scaling factor is / are not configured, the corresponding codepoint (s) (e.g., “10” and / or “11” ) may not be used, such as at least one of but not limited to the example Table 2 and / or example Table 4. It should be noted that the non-limiting example Tables 1 to 4 provided herein do not limit the configurations or the alternative configurations thereof.
[0157] Example Table 1: 2 bits of MCS field, reserved field, new defined field, and / or 2 bits CRC if multiple scaling factors or offsets.
[0158] Example Table 2: 4 states indicated in HARQ process number field and / or PUCCH resource indicator field if multiple scaling factors or offsets.
[0159] Example Table 3: 2 bits of MCS field, reserved field, new defined field, and / or 2 bits field if multiple repetition factors.
[0160] Example Table 4: 4 states indicated in HARQ process number field and / or PUCCH resource indicator field if multiple factors.
[0161] For the capability report of Msg5 repetition and / or Msg5 repetition request indicated in the specific resource, Msg3, and / or PUCCH for Msg4 HARQ-ACK, among others, at least one of but not limited to the following methods or configurations can be configured or provided.
[0162] 1) PRACH preamble and / or occasion can be configured or provided as the container of the capability report of Msg5 repetition and / or Msg5 repetition request.
[0163] a. Specific preamble.
[0164] b. Specific RO.
[0165] 2) Higher layer signaling in Msg3 PUSCH can be configured as the container of capability report of Msg5 repetition and / or Msg5 repetition request.
[0166] a. Logical channel ID (LCID) codepoints, and / or
[0167] b. Reserved codepoint in the MAC subheader, where the reserved codepoint can represent a value (e.g., corresponding to or representing the repetition factor) .
[0168] 3) Physical layer signaling in Msg3 PUSCH can be configured as the container of capability report of Msg5 repetition and / or Msg5 repetition request.
[0169] a. Demodulation reference signal (DMRS) ports.
[0170] b. Scramble the payload of the Msg3 with specific values of TC-RNTI.
[0171] 4) PUCCH for Msg4 HARQ-ACK can be configured as the container of capability report of Msg5 repetition and / or Msg5 repetition request.
[0172] a. PUCCH signal characteristics, e.g., PUCCH DMRS pattern.
[0173] b. PUCCH content.
[0174] Example Implementation 2: Msg5 Repetition Configuration
[0175] In various implementations, to enhance the coverage performance of Msg5, one or more of the following methods, features, operations, or configurations can be considered. The dynamic repetition scaling factor or the repetition factor indicated by the BS 102 and / or the container of the capability report of the Msg5 repetition and / or Msg5 repetition request mentioned above can be reused / repurposed / redefined. In some cases, the BS 102 (e.g., gNB, TRP, wireless communication node) can define / indicate / provide one or more RSRP thresholds.
[0176] Example Configuration 1 of Example Implementation 2
[0177] In some configurations, one RSRP threshold used / utilized to determine whether to report Msg5 repetition can be defined, and the one or more repetition factors can be defined. For example, the threshold range can include {0... 127} , and the repetition factor can include or correspond to at least one of {1, 2, 4, 8, etc. } , to provide an example.
[0178] a) If the RSRP threshold is configured / provided, the UE 104 can measure whether the RSRP of the downlink signal is lower than the configured threshold.
[0179] a. If the measured RSRP is lower than the configured RSRP threshold, the UE 104 can report / notify the capability of Msg5 repetition and / or Msg5 repetition request in the specific resource (e.g., specific ROs, specific preamble, etc. ) .
[0180] i. If one repetition factor is configured via the SIB signaling or other (e.g., higher layer) signalings, the repetition-capable UE 104 can perform Msg5 repetition transmission according to the configured repetition factor.
[0181] ii. If multiple repetition factors are configured via SIB signaling, or other types of signalings, the BS 102 can determine / decide whether to schedule Msg5 repetition and indicate the repetition factor of Msg5 transmissions in the DCI signaling used for scheduling RAR, Msg4, Msg5, and / or RAR transmission, etc. Subsequently, the UE 104 can decode the DCI signaling to obtain the Msg5 transmission configuration. The UE 104 can perform Msg5 transmission according to the corresponding configuration.
[0182] b. In some cases, the specific resource can be associated with the repetition factor of Msg5. For example, if the measured RSRP threshold is lower than the configured RSRP threshold, the UE 104 can determine the specific repetition factor and report the capability of Msg5 repetition and / or Msg5 repetition request in the specific resource (e.g., specific ROs, specific preamble, etc. ) .
[0183] i. The UE 104 can perform Msg5 repetition according to the repetition factor corresponding to the specific resource.
[0184] ii. In some cases, the BS 102 can determine whether to schedule Msg5 repetition.
[0185] 1. If BS 102 does not indicate / provide the repetition factor, the UE 104 can perform Msg5 repetition according to the repetition factor corresponding to the specific resource.
[0186] 2. If BS 102 indicates the repetition factor of Msg5 transmission in the DCI scheduling RAR, Msg4, Msg5, and / or RAR transmission, etc., the indicated repetition factor can override / replace the repetition factor determined by the UE 104. In this case, the UE 104 can perform Msg5 repetition according to the indicated repetition factor corresponding to the specific resource and report the capability of Msg5 repetition and / or request Msg5 repetition via the specific resource.
[0187] c. If the measured RSRP threshold is lower than the configured RSRP threshold, the UE 104 can report the capability of Msg5 repetition and / or Msg5 repetition request in Msg3. For example, the UE 104 can determine that the RSRP is lower than the RSRP threshold for triggering the Msg5 repetition. In this example, the UE 104 may send, in the Msg3 responsive to the determination, the message indicating the capability of the UE 104 to perform the Msg5 repetition and / or include the request for performing the Msg5 repetition in the message.
[0188] i. If one repetition factor is configured, such as via SIB signaling, the capable (e.g., repetition-capable) UE 104 can perform Msg5 repetition transmission according to the configured repetition factor.
[0189] ii. If multiple repetition factors are configured via SIB signaling, the BS 102 may determine whether to schedule Msg5 repetition and indicate the number of repeated transmissions in the DCI used for scheduling at least one of the Msg4 and / or the Msg5, among others. In this case, the UE 104 can decode the DCI signaling to obtain the Msg5 transmission configuration. For instance, the UE 104 can determine one of the multiple repetition configurations from the DCI signaling for scheduling Msg4 and / or Msg5, etc. In response to the determination, the UE 104 can perform Msg5 repetition transmission according to the corresponding configuration (of the various repetition configurations) .
[0190] d. In some cases, the UE 104 may determine that the RSRP is lower than the configured RSRP threshold for triggering the PUSCH repetition (e.g., Msg5 repetition) . If the measured RSRP threshold is lower than the configured RSRP threshold, the UE 104 can report (or send a message including) the capability of Msg5 repetition and / or the Msg5 repetition request and indicate the specific repetition factor in or via / through Msg3, for instance, for PUSCH repetition, in response to the determination.
[0191] i. The UE 104 can perform Msg5 repetition according to the repetition factor reported in Msg3.
[0192] ii. In some cases, the BS 102 may determine / decide whether to schedule the Msg5 repetition.
[0193] 1. If the BS 102 does not indicate the repetition factor, the UE 104 can perform Msg5 repetition according to the repetition factor indicated in Msg3.
[0194] 2. If the BS 102 indicates / provides the repetition factor of Msg5 transmission in the DCI scheduling Msg4 and / or Msg5, etc., the repetition factor indicated in DCI scheduling Msg4 and / or Msg5 can be used instead of (e.g., override) the repetition factor reported in Msg3. In such cases, the UE 104 can perform Msg5 repetition according to the repetition factor indicated in DCI scheduling Msg4 and / or Msg5.
[0195] e. In some cases, the UE 104 can determine that the measured RSRP is less / lower than the RSRP threshold for triggering the Msg5 repetition. In this case, in response to determining that the measured RSRP threshold is lower than the configured RSRP threshold, the UE 104 can report or send the capability of Msg5 repetition and / or Msg5 repetition request in PUCCH transmission for Msg4 HARQ-ACK.
[0196] i. If one repetition factor is configured via the SIB signaling (or other signalings) , the capable UE 104 can perform Msg5 repetition transmission according to the configured repetition factor.
[0197] ii. If multiple repetition factors are configured via the SIB signaling, among others, the BS 102 can determine whether to schedule Msg5 repetition and indicate the repetition factor of Msg5 in the DCI scheduling Msg5. In such cases, according to the determination by the BS 102, the UE 104 can decode the DCI signaling to obtain the Msg5 transmission configuration and perform Msg5 transmission according to the corresponding configuration.
[0198] b) If the RSRP threshold is not configured:
[0199] a. The UE 104 can report the capability of Msg5 repetition and / or send the Msg5 repetition request in the specific resource (e.g., specific ROs, specific preamble, etc. ) . The determination of the repetition factor for Msg5 can be described in conjunction with but not limited to a) -a-i and / or ii of the example configuration 1 of example implementation 2, for example.
[0200] b. In some cases, the specific resource can be associated with the repetition factor of Msg5. The UE 104 can determine the specific repetition factor and report the capability of Msg5 repetition and / or Msg5 repetition request in the specific resource (e.g., specific ROs, specific preamble, etc. ) . The determination of the repetition factor for Msg5 can be described in conjunction with or determined according to, for instance, at least a) -b-i and / or ii of example configuration 1 of example implementation 2, among other example configurations.
[0201] c. The UE 104 can report / send the capability of Msg5 repetition and / or Msg5 repetition request in Msg3. The determination of the repetition factor for Msg5 can be described in conjunction with but not limited to a) -c-i and / or ii of example configuration 1 of example implementation 2.
[0202] d. In some cases, the UE 104 can report the capability of Msg5 repetition and / or Msg5 repetition request and indicate the specific repetition factor in Msg3. The determination of the repetition factor for Msg5 may be described in conjunction with, for example, at least a) -d-i and / or ii of example configuration 1 of example implementation 2.
[0203] e. The UE 104 can report the capability of Msg5 repetition and / or Msg5 repetition request in the PUCCH transmission for Msg4 HARQ-ACK. The determination of the repetition factor for Msg5 may be described in conjunction with, for example, at least a) -e-i and / or ii of example configuration 1 of example implementation 2.
[0204] Example Configuration 2 of Example Implementation 2
[0205] In some configurations, multiple RSRP thresholds used for determining whether to report Msg5 repetition can define or represent multiple repetition factors. The threshold range can include at least {0... 127} , and the repetition factor can include at least one of {1, 2, 4, 8, etc. } , for example.
[0206] a) If the multiple RSRP thresholds are configured, the UE 104 can measure / determine whether the RSRP of the downlink signal is lower than the configured threshold.
[0207] a. In some cases, the RSRP threshold can be associated with the repetition factor. The specific resource can be associated with the repetition factor of Msg5. If the measured RSRP threshold is lower / less than the configured RSRP threshold, the UE 104 can determine the specific repetition factor and report the capability of Msg5 repetition and / or Msg5 repetition request in the specific resource (e.g., specific ROs, specific preamble, etc. ) .
[0208] i. The UE 104 can perform Msg5 repetition according to the repetition factor corresponding to the specific resource.
[0209] ii. In some cases, the BS 102 can determine whether to schedule Msg5 repetition.
[0210] 1. If the BS 102 does not indicate the repetition factor, The UE 104 can perform Msg5 repetition according to the repetition factor corresponding to the specific resource.
[0211] 2. If the BS 102 indicates or provides an indication of the repetition factor of Msg5 transmission in the DCI scheduling RAR, Msg4, Msg5, and / or RAR transmission, the indicated repetition factor can override the repetition factor determined by the UE 104. Then, the UE 104 can perform Msg5 repetition according to the indicated repetition factor corresponding to the specific resource and report the capability of Msg5 repetition and / or request Msg5 repetition via the specific resource.
[0212] b. If the RSRP threshold is not configured.
[0213] i. The RSRP threshold may be associated with repetition factor. The specific resource may be associated with repetition factor of Msg5. The UE 104 can determine the specific repetition factor and report the capability of Msg5 repetition and / or Msg5 repetition request in the specific resource (e.g., specific ROs, specific preamble, etc. ) . In various cases, the determination of the repetition factor for Msg5 can be described in conjunction with at least a) -a-i and / or ii of the example configuration 2 of example implementation 2, for example.
[0214] For the repetition factor determined by the UE 104, the information can be defined / carried / indicated in at least one of the following example configurations.
[0215] 1) PRACH preamble and / or occasion can be configured as the container of repetition factor.
[0216] a. Specific preamble.
[0217] b. Specific RO.
[0218] 2) Higher layer signaling in Msg3 PUSCH can be configured as the container of repetition factor.
[0219] a. LCID codepoints, and / or
[0220] b. Reserved codepoints in the MAC subheader.
[0221] 3) Physical layer signaling in Msg3 PUSCH can be configured as the container of repetition factor.
[0222] a. DMRS ports.
[0223] b. Scramble the payload of the Msg3 with specific values of TC-RNTI.
[0224] Example Implementation 3: Configuration of Msg5 Repetition Coupled with Other Signal Repetition
[0225] In some implementations, one common RSRP threshold or multiple RSRP thresholds can be defined. The capability of the enhanced channel (e.g., Msg1, Msg3, PUCCH transmission for Msg4 HARQ-ACK, Msg5, etc. ) repetition can be reported / provided / indicated in one common signaling (e.g., separate ROs or separate preamble on shared ROs, etc. ) or different signaling (e.g., separate ROs, separate preamble on shared ROs, higher layer signaling in Msg3, or signaling in PUCCH for Msg4 HARQ-ACK, etc. ) . The repetition factor of the enhanced channel can be configured as one or more repetition factors, such as at least described in conjunction with the non-limiting example configurations herein. In various cases, the BS 102 may define or configure / set the one or more RSRP thresholds.
[0226] Example Configuration 1 of Example Implementation 3
[0227] If one common RSRP threshold is provided / defined:
[0228] a) If the RSRP threshold is configured.
[0229] a. The UE 104 can measure / determine whether the RSRP of the downlink signal is lower than the configured RSRP threshold. If the RSRP is lower than the threshold:
[0230] i. If one repetition factor is configured via the SIB signaling (or other types of signalings) , the UE 104 can report the capability of each enhanced channel repetition via the specific resource, such as a specific RO or a specific preamble on shared RO. Subsequently, the UE 104 can perform the enhanced channel repetition transmission according to the configured repetition factor on the specific resource, in response to the reporting.
[0231] ii. If multiple repetition factors are configured via the SIB signaling, etc.:
[0232] 1. Multiple repetition factors for the enhanced channel can be associated with a specific RO group or a specific preamble group. In this case, the UE 104 can report the capability of enhanced channel repetition via the specific RO or specific preamble. The UE 104 can perform enhanced channel repetition transmission according to the configured repetition factor corresponding to the specific resource.
[0233] a. The enhanced channel can include similar repetition factor selected by the UE 104, for example.
[0234] 2. In some cases, multiple repetition factors can be associated with a specific RO group or a specific preamble group for Msg1. In this case, the UE 104 can report the capability of enhanced channel repetition (e.g., Msg1, Msg3, PUCCH for Msg4 HARQ-ACK, Msg5, etc. ) via the specific RO or specific preamble. The UE 104 can perform Msg1 repetition transmission according to the configured repetition factor corresponding to the specific resource, for other enhanced channel repetition factors (e.g., Msg3, PUCCH for Msg4 HARQ-ACK, Msg5, etc. ) .
[0235] a. The BS 102 may determine / decide whether to schedule Msg3 repetition and indicate the number of repeated transmissions by the 2 bits of the MCS information field in RAR. The UE 104 can decode the RAR to obtain the Msg3 transmission configuration and perform Msg3 transmission according to the corresponding configuration.
[0236] b. The BS 102 may determine whether to schedule PUCCH repetition and indicate the number of repeated transmissions by the 2 bits of the DAI information field in the DCI scheduling Msg4. In this case, the UE 104 can decode the DCI to obtain the PUCCH transmission configuration and perform PUCCH transmission according to the corresponding configuration.
[0237] c. The BS 102 can determine whether to schedule Msg5 repetition and indicate the number of repeated transmissions by the 2 bits of the MCS information field in the DCI scheduling Msg5. Subsequently, the UE 104 can decode the DCI to obtain the Msg5 transmission configuration and perform Msg5 transmission according to the corresponding configuration.
[0238] 3. In some cases, multiple repetition factors may be associated with the specific RO group or specific preamble group for Msg1. The UE 104 can report the capability of at least one certain enhanced channel (e.g., Msg1, Msg3, etc. ) repetition via / through a corresponding specific RO or specific preamble, and perform Msg1 repetition transmission according to the configured repetition factor corresponding to the specific resource, for the repetition factor of other enhanced channels (e.g., Msg3, PUCCH for Msg4 HARQ-ACK, Msg5, etc. ) .
[0239] a. The BS 102 may determine whether to schedule Msg3 repetition and indicate the number of repeated transmissions by the 2 bits of the MCS information field in RAR. In this case, the UE 104 can decode the RAR to obtain the Msg3 transmission configuration and perform Msg3 transmission according to the corresponding configuration.
[0240] b. The capability of PUCCH repetition may be reported in the Msg3 message, e.g., PUCCH repetition capability report or request may be indicated independently. The BS 102 can determine whether to schedule PUCCH repetition and indicate the number of repeated transmissions by the 2 bits of the DAI information field in the DCI scheduling Msg4. The UE 104 can decode the DCI to obtain the PUCCH transmission configuration and perform PUCCH transmission according to the corresponding configuration.
[0241] c. The capability of Msg5 repetition may be reported in the Msg3 message and / or PUCCH for Msg4 HARQ-ACK, among other messages or transmissions. For instance, the PUSCH repetition capability report or request may be indicated independently. The BS 102 can determine whether to schedule Msg5 repetition and indicate the number of repeated transmissions by the 2 bits of the MCS information field in the DCI scheduling Msg5. Then, the UE 104 can decode the DCI to obtain the Msg5 transmission configuration and perform Msg5 transmission according to the corresponding configuration.
[0242] b) If the RSRP is not configured:
[0243] a. If one repetition factor is configured via the SIB signaling (or other types of signalings) , the UE 104 can report the capability of enhanced channel repetition via / through specific RO and / or specific preamble on the shared RO. In response to the reporting, the UE 104 can perform enhanced channel repetition transmission according to the configured repetition factor on the specific resource.
[0244] b. If multiple repetition factors are configured via the SIB signaling:
[0245] i. Multiple repetition factors for the enhanced channel can be associated with at least one specific RO group and / or at least one specific preamble group. The UE 104 can report the capability of the enhanced channel repetition via the specific RO or specific preamble and perform enhanced channel repetition transmission according to the configured repetition factor corresponding to the specific resource.
[0246] 1. The enhanced channel may include a similar repetition factor selected by the UE 104.
[0247] ii. In some cases, multiple repetition factors may be associated with the specific RO group or specific preamble group for Msg1. The UE 104 can report the capability of enhanced channel repetition via the specific RO or specific preamble, and perform Msg1 repetition transmission according to the configured repetition factor corresponding to the specific resource, for other enhanced channel repetition factors (e.g., Msg3, PUCCH for Msg4 HARQ-ACK, Msg5, etc. ) .
[0248] 1. The BS 102 may determine whether to schedule Msg3 repetition and indicate the number of repeated transmissions by the 2 bits of the MCS information field in RAR for the UE 104. Subsequently, the UE 104 can decode the RAR to obtain the Msg3 transmission configuration and perform Msg3 transmission according to the corresponding configuration.
[0249] 2. The BS 102 can determine whether to schedule PUCCH repetition and indicate the number of repeated transmissions by the 2 bits of the DAI information field in the DCI scheduling Msg4. The UE 104 can decode the DCI to obtain the PUCCH transmission configuration and perform PUCCH transmission according to the corresponding configuration.
[0250] 3. The BS 102 can determine whether to schedule Msg5 repetition and indicate the number of repeated transmissions by the 2 bits of the MCS information field in the DCI scheduling Msg5. The UE 104 can then decode the DCI to obtain the Msg5 transmission configuration and perform Msg5 transmission according to the corresponding configuration.
[0251] iii. In some cases, multiple repetition factors may be associated with a specific RO group or specific preamble group for Msg1. The UE 104 can report the capability of the at least one certain enhanced channel (e.g., Msg1, Msg3, etc. ) repetition through the specific RO or specific preamble, and perform Msg1 repetition transmission according to the configured repetition factor corresponding to the specific resource, for other enhanced channel repetition factor (e.g., Msg3, PUCCH for Msg4 HARQ-ACK, Msg5, etc. ) .
[0252] 1. The BS 102 can decide whether to schedule Msg3 repetition and indicate the number of repeated transmissions by the 2 bits of the MCS information field in RAR. In response to receiving the RAR, the UE 104 can decode the RAR to obtain the Msg3 transmission configuration. The UE 104 can perform Msg3 transmission according to the corresponding configuration obtained from decoding the RAR.
[0253] 2. The capability of performing the PUCCH repetition may be reported in the Msg3 message, for example, if one of the enhanced channel repetitions is PUCCH repetition. In this case, the PUCCH repetition capability report or request may be indicated independently, for example. The BS 102 can determine whether to schedule PUCCH repetition and indicate the number of repeated transmissions by the 2 bits of the DAI information field in the DCI scheduling Msg4. The UE 104 can decode the DCI to obtain the PUCCH transmission configuration and perform PUCCH transmission according to the corresponding configuration.
[0254] 3. The capability of Msg5 repetition may be reported in the Msg3 message and / or PUCCH for Msg4 HARQ-ACK, for example, if one of the enhanced channel repetitions is PUCCH repetition. In this case, the PUSCH repetition capability report or request may be indicated independently. The BS 102 may decide whether to schedule Msg5 repetition and indicate the number of repeated transmissions by the 2 bits of the MCS information field in the DCI scheduling Msg5. The UE 104 can decode the DCI to obtain the Msg5 transmission configuration and perform Msg5 transmission according to the corresponding configuration.
[0255] c. In some arrangements, repetition may not be performed / executed.
[0256] Example Configuration 2 of Example Implementation 3
[0257] In some configurations, if multiple RSRP thresholds are configured:
[0258] a) If the multiple RSRP thresholds and one repetition factor are configured, multiple RSRP thresholds can be associated with the Msg1 repetition, Msg3 repetition, PUCCH repetition for Msg4 HARQ-ACK, and / or Msg5 repetition. In this case, the UE 104 can measure whether the RSRP of the downlink signal is lower than the configured thresholds.
[0259] a. If the RSRP is lower than the threshold_A, the UE 104 can report the capability of enhanced channel repetition via the specific RO or specific preamble on shared RO and perform enhanced channel repetition transmission according to the configured repetition factor on the specific resource.
[0260] b. If the RSRP is lower than the threshold_B, the UE 104 can report the capability of at least one certain enhanced channel (e.g., Msg1, Msg3, PUCCH for Msg4 HARQ-ACK, or Msg5, etc. ) repetition via the specific RO and / or specific preamble on shared RO, and perform certain enhanced channel repetition transmission according to the configured repetition factor on the specific resource.
[0261] b) If the multiple RSRP thresholds and multiple repetition factors are configured, multiple RSRP thresholds can be associated with multiple repetition factors.
[0262] a. Multiple repetition factors can be associated with at least one specific RO group and / or specific preamble group for Msg1. The UE 104 can measure whether the RSRP of the downlink signal is less / lower than the configured threshold (s) . If the RSRP is lower than the threshold (s) , the UE 104 can report the capability of enhanced channel repetition via the specific RO or specific preamble. Subsequently, the UE 104 can perform / execute enhanced channel repetition transmission according to the configured repetition factor corresponding to the specific resource.
[0263] i. The enhanced channel may include a similar repetition factor selected by the UE 104.
[0264] b. In some cases, multiple repetition factors may be associated with the specific RO group or specific preamble group for Msg1. The UE 104 can measure whether the RSRP of the downlink signal is lower than the configured threshold (s) . If the RSRP is lower than the threshold (s) , the UE 104 can report the capability of enhanced channel repetition through the specific RO or specific preamble, and perform Msg1 repetition transmission according to the configured repetition factor corresponding to the specific resource, for other enhanced channel repetition factors (e.g., Msg3, PUCCH for Msg4 HARQ-ACK, or Msg5, among others) .
[0265] i. The BS 102 may determine whether to schedule Msg3 repetition and indicate the number of repeated transmissions by the 2 bits of the MCS information field in RAR. The UE 104 can decode the RAR to obtain the Msg3 transmission configuration and perform Msg3 transmission according to the corresponding configuration.
[0266] ii. The BS 102 may determine whether to schedule PUCCH repetition and indicate the number of repeated transmissions by the 2 bits of the DAI information field in the DCI scheduling Msg4. Then, the UE 104 can decode the DCI to obtain the PUCCH transmission configuration and perform PUCCH transmission according to the corresponding configuration.
[0267] iii. The BS 102 may determine whether to schedule Msg5 repetition and indicate the number of repeated transmissions by the 2 bits of the MCS information field in the DCI scheduling Msg5. Then, the UE 104 can decode the DCI to obtain the Msg5 transmission configuration and perform Msg5 transmission according to the corresponding configuration.
[0268] c. In some other cases, multiple repetition factors can be associated with at least one specific RO group or specific preamble group for Msg1 repetition and Msg3 repetition capability report. The UE 104 can measure whether the RSRP of the downlink signal is lower than the configured threshold (s) . If the RSRP is lower than the threshold (s) , the UE 104 can report the capability of at least one certain enhanced channel (e.g., Msg1, Msg3, etc. ) repetition via the specific RO or specific preamble. Afterward, the UE 104 can perform Msg1 repetition transmission according to the configured repetition factor corresponding to the specific resource, for other enhanced channels repetition factor (e.g., Msg3, PUCCH for Msg4 HARQ-ACK, Msg5, etc. ) . In some aspects, the at least one certain enhanced channel repetition capability report or request may be indicated independent of, for instance, the associated request (e.g., the request for the at least one certain enhanced channel repetition) .
[0269] i. The BS 102 may determine whether to schedule Msg3 repetition and indicate the number of repeated transmissions by the 2 bits of the MCS information field in RAR. Then, the UE 104 can decode the RAR to obtain the Msg3 transmission configuration and perform Msg3 transmission according to the corresponding configuration.
[0270] ii. The capability of PUCCH repetition is reported in the Msg3 message, the BS 102 may determine whether to schedule PUCCH repetition and indicate the number of repeated transmissions by the 2 bits of the DAI information field in the DCI scheduling Msg4. The PUCCH repetition capability report may be indicated independently of the PUCCH repetition request, for example. Then, the UE 104 can decode the DCI to obtain the PUCCH transmission configuration and perform PUCCH transmission according to the corresponding configuration.
[0271] iii. The capability of Msg5 repetition is reported in the Msg3 message or PUCCH for Msg4 HARQ-ACK, the BS 102 may determine whether to schedule Msg5 repetition and indicate the number of repeated transmissions by the 2 bits of the MCS information field in the DCI scheduling Msg5. The PUSCH repetition capability report or request may be indicated independently. Then, the UE 104 can decode the DCI to obtain the Msg5 transmission configuration and perform Msg5 transmission according to the corresponding configuration.
[0272] c) In some aspects, if the multiple RSRP thresholds are not configured, the UE 104 may not perform repetition, for example.
[0273] FIG. 6 illustrates a flow diagram of an example method 600 for network coverage enhancement (e.g., coverage enhancement in NTN) . The method 600 may be implemented using any one or more of the components and devices detailed herein in conjunction with FIGs. 1 to 5. In brief overview, the method 600 may be performed by at least one wireless communication device (e.g., a UE or terminal device) , at least one wireless communication node (e.g., a BS, gNB, TRP, or access network equipment) , at least one satellite, etc., in some embodiments. Additional, fewer, or different operations may be performed in the method 600 depending on the embodiment. At least one aspect of the operations is directed to a system, method, apparatus, or a computer-readable medium.
[0274] At operation 602, a wireless communication device can send / transmit / provide / communicate / forward / signal a message to / for a wireless communication node. At operation 604, the wireless communication node can receive / obtain / acquire the message from the wireless communication device. The message can indicate a capability of the wireless communication device for performing physical uplink shared channel (PUSCH) repetition, and / or can include / comprise a request for performing the PUSCH repetition (e.g., Msg5 repetition) . The PUSCH repetition can include at least one repetition of PUSCH transmission.
[0275] In some implementations, the PUSCH transmission can comprise at least one of: a PUSCH transmission scheduled by specific signaling, such as specific DCI signaling, and / or a PUSCH transmission containing specific information, such as C-RNTI, for example. In some implementations, the specific signaling can comprise at least one of a downlink control information (DCI) signaling and / or a higher layer signaling.
[0276] In some implementations, the specific information can comprise an indication (e.g., specific information) of at least one of a RRC Setup Complete (e.g., RRCSetupComplete message) , a RRC re-establishment complete, and / or a RRC Resume Complete (e.g., RRCResumeComplete) , etc. In some implementations, the at least one of: the wireless communication device may determine or select a reference signal received power (RSRP) threshold for triggering the PUSCH repetition, to be: (i) same as a RSRP threshold for triggering repetition for a defined transmission, (ii) obtained by multiplying a scaling factor to the RSRP threshold for triggering repetition for the defined transmission, (iii) obtained from the RSRP threshold for triggering repetition for the defined transmission by adding or subtracting an offset, and / or (iv) a RSRP threshold configured by a higher layer signaling, or the wireless communication device may utilize / use some or all of RSRP thresholds for triggering the repetition of the defined transmission, and / or one or more RSRP thresholds configured by the higher layer signaling, to determine some or all of RSRP thresholds for triggering the PUSCH repetition. In various cases, the defined transmission can comprise a physical random access channel (PRACH) transmission, Msg3 transmission, and / or physical uplink control channel (PUCCH) transmission for Msg4 hybrid automatic request acknowledgement (HARQ-ACK) , for example. The Msg3 transmission can comprise a second message transmitted on an uplink shared channel (UL-SCH) containing a cell radio network temporary identifier (C-RNTI) media access control control element (MAC CE) , and / or common control channel (CCCH) service data unit (SDU) , from upper layer and associated with a UE Contention Resolution Identity, as part of a random access procedure.
[0277] In some implementations, some of the RSRP thresholds for triggering the PUSCH repetition may comprise or correspond to at least one of: a highest threshold, a lowest threshold, a first threshold, and / or a second threshold of the RSRP thresholds for triggering repetition of the PRACH transmission. In some implementations, at least one of: the wireless communication device may receive / acquire / obtain a first signaling from the wireless communication node, where the first signaling can comprise an indication (e.g., repetition factor-related indication) of at least one of: one or more scaling factors for scaling a repetition factor, one or more offsets for adjusting a repetition factor, and / or one or more repetition factors for the PUSCH repetition. The first signaling can comprise at least one of a higher layer signaling.
[0278] In some implementations, at least one of: the wireless communication device can determine the repetition factor for PUSCH repetition by at least one of: determining the repetition factor for PUSCH repetition to be the same as a repetition factor of the defined transmission, if (e.g., only) one repetition factor is configured in the first signaling, determining the repetition factor configured in the first signaling as the PUSCH repetition factor; if (e.g., only) one scaling factor is configured in the first signaling, determining the repetition factor for PUSCH repetition by multiplying the scaling factor configured in the first signaling to the repetition factor for the defined transmission; if (e.g., only) one offset is configured in the first signaling, determining the repetition factor for PUSCH repetition by adding or subtracting the offset configured in the first signaling to the repetition factor for the defined transmission; if a plurality of repetition factors are configured in the first signaling: determining, one of the plurality of repetition factors through a second signaling, as the repetition factor for PUSCH repetition; if a plurality of scaling factors are configured in the first signaling: determining, a scaling factor from the plurality of scaling factors through the second signaling, and determining the repetition factor for PUSCH repetition by multiplying the determined scaling factor to the repetition factor for the defined transmission; and / or if a plurality of offsets are configured in the first signaling: determining, an offset from the plurality of offsets through the second signaling, and determining the repetition factor for PUSCH repetition by adding or subtracting the determined offset to the repetition factor for the defined transmission. The wireless communication device can perform the PUSCH repetition according to the determined repetition factor for PUSCH repetition. The second signaling can comprise at least one of: a random access response (RAR) transmission, and / or a downlink control information (DCI) signaling for scheduling a Msg4, PUSCH, and / or RAR transmission, among others.
[0279] In some implementations, each of the RSRP thresholds for triggering repetition of the defined transmission can correspond to a respective repetition factor of the PUSCH repetition. In some implementations, each repetition factor of the PUSCH repetition can correspond to a respective resource, the respective resource comprising a respective random access channel (RACH) occasion (RO) and / or a respective preamble. In some cases, the resource may implicitly represent the repetition indication, such as separate ROs corresponding to each repetition factor (s) , separate preamble corresponding to each repetition factor (s) , etc.
[0280] In some implementations, the wireless communication device may send / provide the message for performing the PUSCH repetition via a first indication, when at least one condition (e.g., condition for sending request or report message) is satisfied / met. In this case, sending the message can include reporting the capability of Msg5 repetition and / or requesting Msg5 repetition through at least one specific resource implicitly, for example. The condition can comprise at least one of but not limited to a measured reference signal received power (RSRP) is lower than a determined RSRP threshold, multiple repetition factors are configured by a first signaling, multiple scaling factors are configured by the first signaling, multiple offsets are configured by the first signaling, and / or if a RSRP threshold for triggering the PUSCH repetition is not configured or determined. The first indication can comprise at least one of: the respective resource, a Msg3 transmission, and / or a physical uplink control channel (PUCCH) transmission for Msg4 hybrid automatic request acknowledgement (HARQ-ACK) , etc. The message for performing the PUSCH can be configured / set via the Msg3 transmission and / or the PUCCH transmission.
[0281] In some implementations, at least one of: the wireless communication device can determine that a measured reference signal received power (RSRP) is lower than a RSRP threshold for triggering the PUSCH repetition; the wireless communication device can send, via / through a third indication responsive to the determination, the message indicating the capability of the wireless communication device for performing the PUSCH repetition, and / or comprising the request for performing the PUSCH repetition, and an indication of a repetition factor for the PUSCH repetition; and / or the wireless communication device can perform the PUSCH repetition according to the repetition factor. The third indication can comprise / include at least one of: a corresponding resource of respective resource, a corresponding signaling in Msg3 transmission, and / or a corresponding signaling in physical uplink control channel (PUCCH) transmission for Msg4 hybrid automatic request acknowledgement (HARQ-ACK) , etc.
[0282] In some implementations, a plurality of repetition factors may be configured for a plurality of enhanced channel repetitions, for instance, as part of a configuration (e.g., repetition factor configuration) for Msg5 repetition coupled with other signal repetition. The plurality of repetition factors can be associated with a group of random access channel (RACH) occasions (ROs) and / or preambles.
[0283] In some implementations, the wireless communication device can send a second message indicating a capability of the wireless communication device for performing at least one of the enhanced channel repetitions, through a corresponding one of the ROs or preambles, a corresponding Msg3 transmission, and / or a corresponding physical uplink control channel (PUCCH) transmission for Msg4 hybrid automatic request acknowledgement (HARQ-ACK) , such as when a condition is satisfied. The condition can comprise at least one of: (e.g., only) one reference signal received power (RSRP) threshold is configured for the plurality of enhanced channel repetitions, and the measured RSRP threshold is lower than the configured RSRP threshold, and / or no RSRP threshold has been configured. The enhanced channel repetitions can comprise repetition of at least one of: a physical random access channel (PRACH) transmission, a Msg3 transmission, a PUCCH transmission for Msg4 HARQ-ACK, and / or the PUSCH transmission.
[0284] In some implementations, if the one of the enhanced channel repetitions is PUCCH repetition, the capability for performing the PUCCH repetition can be reported in a Msg3 transmission. If the one of the enhanced channel repetitions is PUSCH repetition, the capability for performing the PUSCH repetition can be reported in a Msg3 transmission and / or a PUCCH transmission for Msg4 hybrid automatic request acknowledgement (HARQ-ACK) .
[0285] 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.
[0286] 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.
[0287] 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.
[0288] 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.
[0289] 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.
[0290] 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.
[0291] 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 to embodiments of the present solution.
[0292] 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.
[0293] 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 comprising:sending, by a wireless communication device to a wireless communication node, a message indicating a capability of the wireless communication device for performing physical uplink shared channel (PUSCH) repetition, or comprising a request for performing the PUSCH repetition,wherein the PUSCH repetition comprises at least one repetition of PUSCH transmission.2.The method of claim 1, wherein the PUSCH transmission comprises at least one of:a PUSCH transmission scheduled by specific signaling, ora PUSCH transmission containing specific information.3.The method of claim 2, wherein the specific signaling comprises at least one of a downlink control information (DCI) signaling or a higher layer signaling.4.The method of claim 2, wherein the specific information comprises an indication of at least one of a RRC Setup Complete, a RRC re-establishment complete, or a RRC Resume Complete.5.The method of claim 1, comprising at least one of:determining, by the wireless communication device, a reference signal received power (RSRP) threshold for triggering the PUSCH repetition, to be: (i) same as a RSRP threshold for triggering repetition for a defined transmission, (ii) obtained by multiplying a scaling factor to the RSRP threshold for triggering repetition for the defined transmission, (iii) obtained from the RSRP threshold for triggering repetition for the defined transmission by adding or subtracting an offset, or (iv) a RSRP threshold configured by a higher layer signaling, orusing, by the wireless communication device, some or all of RSRP thresholds for triggering the repetition of the defined transmission, or one or more RSRP thresholds configured by the higher layer signaling, to determine some or all of RSRP thresholds for triggering the PUSCH repetition,wherein the defined transmission comprises a physical random access channel (PRACH) transmission, Msg3 transmission, or physical uplink control channel (PUCCH) transmission for Msg4 hybrid automatic request acknowledgement (HARQ-ACK) , andwherein the Msg3 transmission comprises a second message transmitted on an uplink shared channel (UL-SCH) containing a cell radio network temporary identifier (C-RNTI) media access control control element (MAC CE) or common control channel (CCCH) service data unit (SDU) , from upper layer and associated with a UE Contention Resolution Identity, as part of a random access procedure.6.The method of claim 5, wherein the some of the RSRP thresholds for triggering the PUSCH repetition comprise at least one of: a highest threshold, a lowest threshold, a first threshold, or a second threshold of the RSRP thresholds for triggering repetition of the PRACH transmission.7.The method of claim 5, comprising at least one of:receiving, by the wireless communication device from the wireless communication node, a first signaling comprising an indication of at least one of: one or more scaling factors for scaling a repetition factor, one or more offsets for adjusting a repetition factor, or one or more repetition factors for the PUSCH repetition,wherein the first signaling comprising at least one of a higher layer signaling.8.The method of claim 7, comprising at least one of:determining, by the wireless communication device, the repetition factor for PUSCH repetition by at least one of:determining the repetition factor for PUSCH repetition to be same as a repetition factor of the defined transmission,if only one repetition factor is configured in the first signaling, determining the repetition factor configured in the first signaling as the PUSCH repetition factor;if only one scaling factor is configured in the first signaling, determining the repetition factor for PUSCH repetition by multiplying the scaling factor configured in the first signaling to the repetition factor for the defined transmission;if only one offset is configured in the first signaling, determining the repetition factor for PUSCH repetition by adding or subtracting the offset configured in the first signaling to the repetition factor for the defined transmission;if a plurality of repetition factors are configured in the first signaling:determining, one of the plurality of repetition factors through a second signaling, as the repetition factor for PUSCH repetition;if a plurality of scaling factors are configured in the first signaling:determining, a scaling factor from the plurality of scaling factors through the second signaling, and determining the repetition factor for PUSCH repetition by multiplying the determined scaling factor to the repetition factor for the defined transmission; orif a plurality of offsets are configured in the first signaling:determining, an offset from the plurality of offsets through the second signaling, and determining the repetition factor for PUSCH repetition by adding or subtracting the determined offset to the repetition factor for the defined transmission; andperforming, by the wireless communication device, the PUSCH repetition according to the determined repetition factor for PUSCH repetition,wherein the second signaling comprises at least one of: a random access response (RAR) transmission, or a downlink control information (DCI) signaling for scheduling a Msg4, PUSCH, or RAR transmission.9.The method of claim 5, whereineach of the RSRP thresholds for triggering repetition of the defined transmission corresponds to a respective repetition factor of the PUSCH repetition.10.The method of claim 9, wherein each repetition factor of the PUSCH repetition corresponds to a respective resource, the respective resource comprising a respective random access channel (RACH) occasion (RO) or a respective preamble.11.The method of claim 10, comprising:sending, by the wireless communication device, the message for performing the PUSCH repetition via a first indication, when a condition is satisfied, wherein the condition comprises at least one of:a measured reference signal received power (RSRP) is lower than a determined RSRP threshold,multiple repetition factors are configured by a first signaling,multiple scaling factors are configured by the first signaling,multiple offsets are configured by the first signaling, orif a RSRP threshold for triggering the PUSCH repetition is not configured or determined,wherein the first indication comprises at least one of: the respective resource, a Msg3 transmission, or a physical uplink control channel (PUCCH) transmission for Msg4 hybrid automatic request acknowledgement (HARQ-ACK) .12.The method of claim 1, comprising at least one of:determining, by the wireless communication device, that a measured reference signal received power (RSRP) is lower than a RSRP threshold for triggering the PUSCH repetition;sending, by the wireless communication device through a third indication responsive to the determination, the message indicating the capability of the wireless communication device for performing the PUSCH repetition, or comprising the request for performing the PUSCH repetition, and an indication of a repetition factor for the PUSCH repetition; orperforming, by the wireless communication device, the PUSCH repetition according to the repetition factor,wherein the third indication comprises at least one of: a corresponding resource of respective resource, a corresponding signaling in Msg3 transmission, or a corresponding signaling in physical uplink control channel (PUCCH) transmission for Msg4 hybrid automatic request acknowledgement (HARQ-ACK) .13.The method of claim 1, wherein a plurality of repetition factors are configured for a plurality of enhanced channel repetitions, andthe plurality of repetition factors is associated with a group of random access channel (RACH) occasions (ROs) or preambles.14.The method of claim 13, comprisingsending, by the wireless communication device, a second message indicating a capability of the wireless communication device for performing at least one of the enhanced channel repetitions, through a corresponding one of the ROs or preambles, a corresponding Msg3 transmission, or a corresponding physical uplink control channel (PUCCH) transmission for Msg4 hybrid automatic request acknowledgement (HARQ-ACK) , when a condition is satisfied, wherein the condition comprises at least one of:only one reference signal received power (RSRP) threshold is configured for the plurality of enhanced channel repetitions, and the measured RSRP threshold is lower than the configured RSRP threshold, orno RSRP threshold has been configured,wherein the enhanced channel repetitions comprise repetition of at least one of: a physical random access channel (PRACH) transmission, a Msg3 transmission, a PUCCH transmission for Msg4 HARQ-ACK, or the PUSCH transmission.15.The method of claim 13, wherein:if the one of the enhanced channel repetitions is PUCCH repetition, the capability for performing the PUCCH repetition is reported in a Msg3 transmission; andif the one of the enhanced channel repetitions is PUSCH repetition, the capability for performing the PUSCH repetition is reported in a Msg3 transmission or a PUCCH transmission for Msg4 hybrid automatic request acknowledgement (HARQ-ACK) .16.A method comprising:receiving, by to a wireless communication node from a wireless communication device a message indicating a capability of the wireless communication device for performing PUSCH repetition, or comprising a request for performing the PUSCH repetition,wherein the PUSCH repetition comprises at least one repetition of PUSCH transmission.17.A non-transitory computer readable medium storing instructions, which when executed by at least one processor, cause the at least one processor to perform the method of any one of claims 1 to 16.18.An apparatus comprising:at least one processor configured to perform the method of any one of claims 1 to 16.
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