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WO2025223174A1 - Procédés et appareil pour des améliorations concernant des conceptions de structure et de motif d'un bloc de synchronisation dans des communications sans fil - Google Patents

Procédés et appareil pour des améliorations concernant des conceptions de structure et de motif d'un bloc de synchronisation dans des communications sans fil

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Publication number
WO2025223174A1
WO2025223174A1 PCT/CN2025/087069 CN2025087069W WO2025223174A1 WO 2025223174 A1 WO2025223174 A1 WO 2025223174A1 CN 2025087069 W CN2025087069 W CN 2025087069W WO 2025223174 A1 WO2025223174 A1 WO 2025223174A1
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WO
WIPO (PCT)
Prior art keywords
syncblock
sss
pss
instances
pbch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2025/087069
Other languages
English (en)
Inventor
Wen Tang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MediaTek Singapore Pte Ltd
Original Assignee
MediaTek Singapore Pte Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MediaTek Singapore Pte Ltd filed Critical MediaTek Singapore Pte Ltd
Publication of WO2025223174A1 publication Critical patent/WO2025223174A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
    • H04J11/0073—Acquisition of primary synchronisation channel, e.g. detection of cell-ID within cell-ID group
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
    • H04J11/0076—Acquisition of secondary synchronisation channel, e.g. detection of cell-ID group
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/06—Airborne or Satellite Networks

Definitions

  • the present disclosure is generally related to wireless communications and, more particularly, to enhancements on structure and pattern designs of synchronization block in wireless communications.
  • LTE long-term evolution
  • 4G 4 th generation
  • UMTS universal mobile telecommunication system
  • E-UTRAN evolved universal terrestrial radio access network
  • eNodeBs or eNBs evolved Node-Bs
  • UE user equipment
  • 3GPP 3 rd generation partner project
  • the next generation mobile network (NGMN) board has decided to focus the future NGMN activities on defining the end-to-end requirements for 5 th generation (5G) new radio (NR) systems and 6G systems.
  • 5G 5 th generation
  • NR new radio
  • low signal-to-noise (SNR) ratio received at the receiver e.g., UE
  • SNR signal-to-noise
  • NTN non-terrestrial network
  • the distance between the UE and the satellite is quite long and the radio condition of the communications therebetween may vary rapidly due to satellite and UE movements. Consequently, low SNR ratio will lead to low success rates in signal detection, demodulation, and/or decoding at the receiver.
  • One objective of the present disclosure is proposing schemes, concepts, designs, systems, methods and apparatus pertaining to enhancements on structure and pattern designs of synchronization block in wireless communications. It is believed that the above-described issue would be avoided or otherwise alleviated by implementing one or more of the proposed schemes described herein.
  • a method may involve an apparatus receiving a synchronization block (SyncBlock) from a network node, wherein the SyncBlock comprises one or more instances of at least one of a primary synchronization signal (PSS) , a physical broadcast channel (PBCH) , and a secondary synchronization signal (SSS) that is multiplexed into the PBCH in frequency domain.
  • the method may also involve the apparatus accumulating the one or more instances of the at least one of the PSS, the PBCH, and the SSS within the SyncBlock.
  • the method may further involve the apparatus performing a synchronization with the network node based on the accumulation.
  • a method may involve a network node generating a SyncBlock comprising one or more instances of at least one of a PSS, a PBCH, and an SSS that is multiplexed into the PBCH in frequency domain.
  • the method may also involve the network node transmitting the SyncBlock to an apparatus.
  • an apparatus may comprise a transceiver which, during operation, wirelessly communicates with a network node.
  • the apparatus may also comprise a processor communicatively coupled to the transceiver.
  • the processor may perform operations comprising receiving, via the transceiver, a SyncBlock from the network node, wherein the SyncBlock comprises one or more instances of at least one of a PSS, a PBCH, and an SSS that is multiplexed into the PBCH in frequency domain.
  • the processor may also perform operations comprising accumulating the one or multiple instances of the at least one of the PSS, the PBCH, and the SSS within the SyncBlock.
  • the processor may further perform operations comprising performing a synchronization with the network node based on the accumulation.
  • LTE Long-Term Evolution
  • LTE-Advanced Long-Term Evolution-Advanced
  • LTE-Advanced Pro 5th Generation
  • NR New Radio
  • IoT Internet-of-Things
  • NB-IoT Narrow Band Internet of Things
  • IIoT Industrial Internet of Things
  • B5G beyond 5G
  • 6G 6th Generation
  • the proposed concepts, schemes and any variation (s) /derivative (s) thereof may be implemented in, for and by other types of radio access technologies, networks and network topologies.
  • the scope of the present disclosure is not limited to the examples described herein.
  • FIG. 1 is a diagram depicting an example scenario of the time-frequency structure of a synchronization signal block (SSB) in 5G NR.
  • SSB synchronization signal block
  • FIG. 2 is a diagram depicting an example scenario of a communication environment in which various solutions and schemes in accordance with the present disclosure may be implemented.
  • FIG. 3 is a diagram depicting an example scenario of the enhanced SyncBlock structure w in accordance with an implementation of the present disclosure.
  • FIG. 4 is a diagram depicting another example scenario of the enhanced SyncBlock structure in accordance with an implementation of the present disclosure.
  • FIG. 5 is a diagram depicting another three example scenarios of the enhanced SyncBlock structure in accordance with an implementation of the present disclosure.
  • FIG. 6 is a diagram depicting two more example scenarios of the enhanced SyncBlock structure in accordance with an implementation of the present disclosure.
  • FIG. 7 is a block diagram of an example communication system in accordance with an implementation of the present disclosure.
  • FIG. 8 is a flowchart of an example process in accordance with an implementation of the present disclosure.
  • FIG. 9 is a flowchart of another example process in accordance with an implementation of the present disclosure. DETAILED DESCRIPTION OF PREFERRED IMPLEMENTATIONS
  • Implementations in accordance with the present disclosure relate to various techniques, methods, schemes and/or solutions pertaining to enhancements on structure and pattern designs of synchronization block in wireless communications.
  • a number of possible solutions may be implemented separately or jointly. That is, although these possible solutions may be described below separately, two or more of these possible solutions may be implemented in one combination or another.
  • NTN refers to a network that uses radio frequency (RF) and information processing resources carried on high, medium and low orbit satellites or other high-altitude communication platforms to provide communication services for UEs.
  • RF radio frequency
  • the satellite According to the load capacity on the satellite, there are two typical scenarios, namely: transparent payload and regenerative payload.
  • transparent payload mode the satellite does not process the signal and waveform in the communication service but, rather, only functions as an RF amplifier to forward data.
  • regenerative payload mode the satellite, other than RF amplification, also has the processing capabilities of modulation/demodulation, coding/decoding, switching, routing and so on.
  • FIG. 1 illustrates an example scenario 100 of the time-frequency structure of an SSB in 5G NR.
  • an SSB may consist of primary and secondary synchronization signals (PSS, SSS) , each occupying 1 symbol and 127 subcarriers, and a PBCH spanning across 3 orthogonal frequency-division multiplexing (OFDM) symbols and 240 subcarriers.
  • PSS primary and secondary synchronization signals
  • SSS primary and secondary synchronization signals
  • OFDM orthogonal frequency-division multiplexing
  • some time or frequency domain signal accumulation techniques may be employed.
  • the transmitter e.g., base station (BS)
  • the receiver e.g., UE
  • the transmitter may repeat the transmission of the same signal (e.g., SSB)
  • the receiver e.g., UE
  • the repetition of signals at different time intervals by the transmitter may impact the success rate of signal detection, demodulating, and/or decoding at the receiver, which influence the DL synchronization procedure.
  • a SyncBlock may include one or more instances (or called repetitions or shots) of at least one of a PSS, a PBCH, and an SSS that is multiplexed into the PBCH in frequency domain, such that the receiver (e.g., UE) may accumulate the instances of the PSS, the PBCH, and/or the SSS within one SyncBlock to perform synchronization with the transmitter (e.g., BS) .
  • the receiver e.g., UE
  • the transmitter e.g., BS
  • the maximum SyncBlock length is increased/extended to occupy N symbols (the maximum values of N>4) to carry the multiple instances of the PSS, the PBCH, and/or the SSS.
  • the SyncBlock is allowed to include a plurality of items selected from the group consisting of PSS, PBCH, and SSS. Accordingly, by applying the schemes of the present disclosure, the success rate of signal detection, demodulating, and/or decoding at the receiver may be enhanced to achieve quick initial cell search and ensure better communication performance.
  • FIG. 2 illustrates an example scenario 200 of a communication environment in which various solutions and schemes in accordance with the present disclosure may be implemented.
  • Scenario 200 involves a UE 210 in wireless communication with a network 220 (e.g., a wireless network including an NTN and a TN) via a terrestrial network node 222 (e.g., a BS such as an eNB, a Next Generation Node-B (gNB) , a transmission/reception point (TRP) , or a gateway) and/or a non-terrestrial network node 224 (e.g., a satellite) .
  • a network 220 e.g., a wireless network including an NTN and a TN
  • a terrestrial network node 222 e.g., a BS such as an eNB, a Next Generation Node-B (gNB) , a transmission/reception point (TRP) , or a gateway
  • gNB Next Generation Node-B
  • the terrestrial network node 222 and the non-terrestrial network node 224 may form an NTN serving cell for wireless communication with the UE 210.
  • the UE 210, the network 220, and the terrestrial network node 222 and/or the non-terrestrial network node 224 may implement various schemes pertaining to enhancements on structure and pattern designs of synchronization block in wireless communications in accordance with the present disclosure, as described below. It is noteworthy that, while the various proposed schemes may be individually or separately described below, in actual implementations some or all of the proposed schemes may be utilized or otherwise implemented jointly. Of course, each of the proposed schemes may be utilized or otherwise implemented individually or separately.
  • one SyncBlock may also include one or more symbols that are empty or include contents other than the PSS, the PBCH, and the SSS.
  • FIG. 3 illustrates an example scenario 300 of the enhanced SyncBlock structure in accordance with an implementation of the present disclosure.
  • Scenario 300 depicts the case where one SyncBlock occupies 28 symbols (i.e., 2 slots) and within the SyncBlock, there are 8 PSS instances each occupying 1 symbol, 4 SSS instances each occupying 3 symbol, and 4 PBCH instances each occupying 3 symbols.
  • the SSS instances occupy the same symbols as the PBCH instances, and are frequency multiplexed within the PBCH instances.
  • the SSS sequence may be mapped to every several (e.g., 3 or 4) subcarrier in each PBCH symbol (e.g., to replace the demodulation reference signal (DMRS) in each PBCH symbol) , and the SSS may be used for (fine) frequency-offset estimation and channel estimation for PBCH decoding.
  • one (or more) of these 8 PSS instances may include negative PSS (i.e., the sign reversal of PSS) , and an example of the sign set of thee PSS instances is ⁇ 1, 1, -1, 1, 1, 1, 1, 1 ⁇ as shown in FIG. 3.
  • different sign sets of the PSS instances may be used for M SSB repetitions (e.g., without beam sweeping) within one SyncBlock period (or called periodicity) .
  • M SyncBlock repetitions e.g., without beam sweeping
  • the same SyncBlock index corresponding to the same beam may be used for the M repetitions.
  • the SyncBlock periodicity may be 40 milli-seconds (ms) .
  • FIG. 4 illustrates an example scenario 400 of the enhanced SyncBlock structure in accordance with an implementation of the present disclosure.
  • Scenario 400 depicts the case where one SyncBlock occupies 14 symbols (i.e., 1 slot) and within the SyncBlock, there are 4 PSS instances each occupying 1 symbol, 3 SSS instances each occupying 3 symbols, and 3 PBCH instances each occupying 3 symbols.
  • the SSS instances occupy the same symbols as the PBCH instances, and are frequency multiplexed within the PBCH instances.
  • the SSS sequence may be mapped to every several (e.g., 3 or 4) subcarrier in each PBCH symbol (e.g., to replace the DMRS in each PBCH symbol) , and the SSS may be used for (fine) frequency-offset estimation and channel estimation for PBCH decoding.
  • one (or more) of these 4 PSS instances may include negative PSS (i.e., the sign reversal of PSS) , and an example of the sign set of the PSS instances is ⁇ 1, -1, 1, 1 ⁇ as shown in FIG. 4.
  • different sign sets of the PSS instances may be used for M SSB repetitions (e.g., without beam sweeping) within one SyncBlock periodicity.
  • SyncBlock periodicity there may be M SyncBlock repetitions (e.g., without beam sweeping) within one SyncBlock periodicity, and the same SyncBlock index corresponding to the same beam may be used for the M repetitions.
  • SyncBlock numbers e.g., with beam sweeping
  • different SyncBlock indices corresponding to different beams may be used for different SyncBlocks.
  • the SyncBlock periodicity may be 40 ms.
  • FIG. 5 illustrates three example scenarios 510-530 of the enhanced SyncBlock structure in accordance with an implementation of the present disclosure. All scenarios 510-530 depict the case where one SyncBlock occupies 14 symbols (i.e., 1 slot) and within the SyncBlock, there are 8 PSS instances each occupying 1 symbol, 2 SSS instances each occupying 2 symbols, and 2 PBCH instances each occupying 2 symbols. Specifically, the SSS instances occupy the same symbols as the PBCH instances, and are frequency multiplexed within the PBCH instances.
  • the SSS sequence may be mapped to every several (e.g., 3 or 4) subcarrier in each PBCH symbol (e.g., to replace the DMRS in each PBCH symbol) , and the SSS may be used for (fine) frequency-offset estimation and channel estimation for PBCH decoding.
  • one (or more) of these 8 PSS instances may include negative PSS (i.e., the sign reversal of PSS) , and an example of the sign set of the PSS instances is ⁇ 1, 1, -1, 1, 1, 1, 1, 1 ⁇ as shown in FIG. 5.
  • different sign sets of the PSS instances may be used for M SSB repetitions (e.g., without beam sweeping) within one SyncBlock periodicity.
  • SyncBlock periodicity there may be M SyncBlock repetitions (e.g., without beam sweeping) within one SyncBlock periodicity, and the same SyncBlock index corresponding to the same beam may be used for the M repetitions.
  • SyncBlock numbers e.g., with beam sweeping
  • the SyncBlock periodicity may be 20 ms.
  • FIG. 6 illustrates two example scenarios 610 and 620 of the enhanced SyncBlock structure in accordance with an implementation of the present disclosure.
  • the SSS instance occupies the same symbols as the PBCH instance, and are frequency multiplexed within the PBCH instances.
  • the SSS sequence may be mapped to every several (e.g., 3 or 4) subcarrier in each PBCH symbol (e.g., to replace the DMRS in each PBCH symbol) , and the SSS may be used for (fine) frequency-offset estimation and channel estimation for PBCH decoding.
  • one (or more) of these P PSS instances may include negative PSS (i.e., the sign reversal of PSS) , and an example of the sign set of the PSS instances is ⁇ 1, -1 ⁇ as shown in FIG. 6.
  • different sign sets of the PSS instances may be used for M SSB repetitions (e.g., without beam sweeping) within one SyncBlock periodicity.
  • the sign set ⁇ 1, 1 ⁇ is used for repetition_1 within one SyncBlock periodicity
  • the sign set ⁇ 1, -1 ⁇ is used for repetition_2 within one SyncBlock periodicity.
  • M e.g., M ⁇ 8
  • SyncBlock repetitions e.g., without beam sweeping
  • the same SyncBlock index corresponding to the same beam may be used for the M repetitions.
  • different values of P may be used for different network systems, sub-carrier spacings (SCSs) , or frequency ranges/bands.
  • SCSs sub-carrier spacings
  • a method for determination of the values of P and M is proposed for the case (e.g., scenario 610 or 620) where one SyncBlock occupies 7 symbols with P PSS instances each occupying 1 symbol.
  • the method may include multiple steps as follows.
  • the UE may accumulate the absolute value of PSS correlation with M ⁇ 8, to find PSS peaks and the first PSS (symbol boundary) .
  • the UE may accumulate the absolute value of SSS correlation with M ⁇ 8, to find SSS peaks and first SSS (symbol boundary) .
  • the UE may find the symbol gap between first PSS and first SSS, and decide PSS repetition number within one SyncBlock, which is used to determine the value of P.
  • the UE may determine the scope of M based on the value of P, and find out the final value of M based on the absolute value of PSS correlation within M SyncBlock repetitions.
  • a method for determination of the value of N (i.e., symbol number) is proposed.
  • the method may include multiple steps as follows.
  • step 1 the UE may decode PBCH to find out the SyncBlock index.
  • step 2 the UE may find out the first SyncBlock repetition for the SyncBlock index, where the sign set of PSS instances within the first SyncBlock repetition for the SyncBlock index should be all positive, which means the PSS correlation values are not reverse within one SyncBlock.
  • the UE may determine the symbol number N of the first SyncBlock repetition for the SyncBlock index based on the SyncBlock index, SyncBlock periodicity, and the value of M.
  • the number of subsequential PSS instances and/or the sign set of PSS instances within one SyncBlock or one specific duration may be used to indicate satellite position assistance information (e.g., minimum or maximum elevation for one beam index) .
  • satellite position assistance information e.g., minimum or maximum elevation for one beam index
  • the sign sets of PSS instances may indicate the information as shown in table 1 and table 2 below. Table 1. Table 2.
  • enhanced PSS and/or SSS pattern of transmissions are proposed to deliver certain information.
  • the resource elements (REs) of the PSS and/or SSS may be transmitted with different power levels (e.g., different positions for the maximum PSS/SSS RE power) to indicate M SyncBlock repetitions (e.g., without beam sweeping) , where M is the SyncBlock repetition number (without beam sweeping) for one SyncBlock index.
  • PSS and/or SSS have 12 REs with index ⁇ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ⁇ for example.
  • the PSS and/or SSS REs with index ⁇ 1, 2, 3 ⁇ for the 1 st SyncBlock repetition may (be detected by the UE to) have larger received power (e.g., 3 times) than the PSS and/or SSS REs with index ⁇ 4, 5, 6, 7, 8, 9, 10, 11, 12 ⁇ .
  • the PSS and/or SSS REs with index ⁇ 4, 5, 6 ⁇ for the 2 nd SyncBlock repetition may have larger received power (e.g., 3 times) than the PSS and/or SSS REs with index ⁇ 1, 2, 3, 7, 8, 9, 10, 11, 12 ⁇ .
  • the PSS and/or SSS REs with index ⁇ 7, 8, 9 ⁇ for the 3 rd SSB repetition may have larger received power (e.g., 3 times) than the PSS and/or SSS REs with index ⁇ 1, 2, 3, 4, 5, 6, 10, 11, 12 ⁇ .
  • the PSS and/or SSS REs with index ⁇ 10, 11, 12 ⁇ for the 4 th SSB repetition may have larger received power (e.g. 3 times) than the PSS and/or SSS REs with index ⁇ 1, 2, 3, 4, 5, 6, 7, 8, 9 ⁇ .
  • FIG. 7 illustrates an example communication system 700 having an example communication apparatus 710 and an example network apparatus 720 in accordance with an implementation of the present disclosure.
  • Each of communication apparatus 710 and network apparatus 720 may perform various functions to implement schemes, techniques, processes and methods described herein pertaining to enhancements on structure and pattern designs of synchronization block in wireless communications, including scenarios/schemes described above as well as processes 800 and 900 described below.
  • Communication apparatus 710 may be a part of an electronic apparatus, which may be a UE such as a portable or mobile apparatus, a wearable apparatus, a wireless communication apparatus or a computing apparatus.
  • communication apparatus 710 may be implemented in a smartphone, a smartwatch, a personal digital assistant, an electronic control unit (ECU) in a vehicle, a digital camera, or a computing equipment such as a tablet computer, a laptop computer or a notebook computer.
  • Communication apparatus 710 may also be a part of a machine type apparatus, which may be an IoT, NB-IoT, or IIoT UE such as an immobile or a stationary apparatus, a home apparatus, a roadside unit (RSU) , a wire communication apparatus or a computing apparatus.
  • communication apparatus 710 may be implemented in a smart thermostat, a smart fridge, a smart door lock, a wireless speaker or a home control center.
  • communication apparatus 710 may be implemented in the form of one or more integrated-circuit (IC) chips such as, for example and without limitation, one or more single-core processors, one or more multi-core processors, one or more reduced-instruction set computing (RISC) processors, or one or more complex-instruction-set-computing (CISC) processors.
  • IC integrated-circuit
  • RISC reduced-instruction set computing
  • CISC complex-instruction-set-computing
  • Communication apparatus 710 may further include one or more other components not pertinent to the proposed scheme of the present disclosure (e.g., internal power supply, display device and/or user interface device) , and, thus, such component (s) of communication apparatus 710 are neither shown in FIG. 7 nor described below in the interest of simplicity and brevity.
  • other components e.g., internal power supply, display device and/or user interface device
  • Network apparatus 720 may be a part of an electronic apparatus, which may be a network node such as a satellite, a BS, a cell, a router or a gateway of a 4G/5G/B5G/6G, NR, IoT, NB-IoT, IIoT, or NTN network.
  • network apparatus 720 may be implemented in a satellite or an eNB/gNB/TRP in a 4G/5G, NR, IoT, NB-IoT, IIoT, or NTN network.
  • network apparatus 720 may be implemented in the form of one or more IC chips such as, for example and without limitation, one or more single-core processors, one or more multi-core processors, or one or more RISC or CISC processors.
  • Network apparatus 720 may include at least some of those components shown in FIG. 7 such as a processor 722, for example.
  • Network apparatus 720 may further include one or more other components not pertinent to the proposed scheme of the present disclosure (e.g., internal power supply, display device and/or user interface device) , and, thus, such component (s) of network apparatus 720 are neither shown in FIG. 7 nor described below in the interest of simplicity and brevity.
  • each of processor 712 and processor 722 may be implemented in the form of one or more single-core processors, one or more multi-core processors, or one or more CISC processors. That is, even though a singular term “aprocessor” is used herein to refer to processor 712 and processor 722, each of processor 712 and processor 722 may include multiple processors in some implementations and a single processor in other implementations in accordance with the present disclosure.
  • each of processor 712 and processor 722 may be implemented in the form of hardware (and, optionally, firmware) with electronic components including, for example and without limitation, one or more transistors, one or more diodes, one or more capacitors, one or more resistors, one or more inductors, one or more memristors and/or one or more varactors that are configured and arranged to achieve specific purposes in accordance with the present disclosure.
  • each of processor 712 and processor 722 is a special-purpose machine specifically designed, arranged and configured to perform specific tasks in a device (e.g., as represented by communication apparatus 710) and a network node (e.g., as represented by network apparatus 720) in accordance with various implementations of the present disclosure.
  • communication apparatus 710 may also include a transceiver 716 coupled to processor 712 and capable of wirelessly transmitting and receiving data.
  • transceiver 716 may be capable of wirelessly communicating with different types of UEs and/or wireless networks of different RATs.
  • transceiver 716 may be equipped with a plurality of antenna ports (not shown) such as, for example, four antenna ports. That is, transceiver 716 may be equipped with multiple transmit antennas and multiple receive antennas for beamforming and multiple-input multiple-output (MIMO) wireless communications.
  • network apparatus 720 may also include a transceiver 726 coupled to processor 722.
  • Transceiver 726 may include a transceiver capable of wirelessly transmitting and receiving data.
  • transceiver 726 may be capable of wirelessly communicating with different types of UEs of different RATs.
  • transceiver 726 may be equipped with a plurality of antenna ports (not shown) such as, for example, four antenna ports. That is, transceiver 726 may be equipped with multiple transmit antennas and multiple receive antennas for beamforming and MIMO wireless communications.
  • communication apparatus 710 may further include a memory 714 coupled to processor 712 and capable of being accessed by processor 712 and storing data therein.
  • network apparatus 720 may further include a memory 724 coupled to processor 722 and capable of being accessed by processor 722 and storing data therein.
  • RAM random-access memory
  • DRAM dynamic RAM
  • SRAM static RAM
  • T-RAM thyristor RAM
  • Z-RAM zero-capacitor RAM
  • each of memory 714 and memory 724 may include a type of read-only memory (ROM) such as mask ROM, programmable ROM (PROM) , erasable programmable ROM (EPROM) and/or electrically erasable programmable ROM (EEPROM) .
  • ROM read-only memory
  • PROM programmable ROM
  • EPROM erasable programmable ROM
  • EEPROM electrically erasable programmable ROM
  • each of memory 714 and memory 724 may include a type of non-volatile random-access memory (NVRAM) such as flash memory, solid-state memory, ferroelectric RAM (FeRAM) , magnetoresistive RAM (MRAM) and/or phase-change memory.
  • NVRAM non-volatile random-access memory
  • Each of communication apparatus 710 and network apparatus 720 may be a communication entity capable of communicating with each other using various proposed schemes in accordance with the present disclosure.
  • a description of capabilities of communication apparatus 710, as a UE, and network apparatus 720, as a network node, is provided below with processes 700 and 700.
  • FIG. 8 illustrates an example process 800 in accordance with an implementation of the present disclosure.
  • Process 800 may be an example implementation of above scenarios/schemes, whether partially or completely, with respect to enhancements on structure and pattern designs of synchronization block in wireless communications.
  • Process 800 may represent an aspect of implementation of features of communication apparatus 710.
  • Process 800 may include one or more operations, actions, or functions as illustrated by one or more of blocks 810 to 830. Although illustrated as discrete blocks, various blocks of process 800 may be divided into additional blocks, combined into fewer blocks, or eliminated, depending on the desired implementation. Moreover, the blocks of process 800 may be executed in the order shown in FIG. 8 or, alternatively, in a different order.
  • Process 800 may be implemented by or in communication apparatus 710 or any suitable UE or machine type devices. Solely for illustrative purposes and without limitation, process 800 is described below in the context of communication apparatus 710, as a UE, and network apparatus 720, as a network node. Process 800 may begin at block 810.
  • process 800 may involve processor 712 of communication apparatus 710, receiving, via transceiver 716, a SyncBlock from network apparatus 720, wherein the SyncBlock comprises one or more instances of at least one of a PSS, a PBCH, and an SSS that is multiplexed into the PBCH in frequency domain.
  • Process 800 may proceed from block 810 to block 820.
  • process 800 may involve processor 712 accumulating the one or multiple instances of the at least one of the PSS, the PBCH, and the SSS within the SyncBlock. Process 800 may proceed from block 820 to block 830.
  • process 800 may involve processor 712 performing a synchronization with network apparatus 720 based on the accumulation.
  • process 800 may further involve processor 712 performing at least one of a frequency-offset estimation and a channel estimation based on the SSS, and performing PBCH decoding based on the at least one of the frequency-offset estimation and the channel estimation.
  • the SyncBlock may occupy 7, 14, or 28 symbols.
  • the SyncBlock may include at least one of the following: (i) one or more PSS instances, each occupies one or more symbols; (ii) one or more PBCH instances, each occupies multiple symbols; and (iii) one or more SSS instances, each occupies the multiple symbols of one of the one or more PBCH instances; and (iv) one or more symbols that are empty or comprise contents other than the PSS, the PBCH, and the SSS .
  • each of the SSS instance may include an SSS sequence that is mapped to every several subcarriers in each symbol occupied by the PBCH instance.
  • one or more of the PSS or SSS instances may each include a sign reversal of a PSS or SSS, while rest of the PSS or SSS instances may each include the PSS or SSS.
  • one or more repetitions of the SyncBlock may be transmitted by network apparatus 720 within a period, and a sign set of the PSS instances in each of the repetitions may be different.
  • one or more repetitions of the SyncBlock may be transmitted by network apparatus 720 within a period, and the one or more repetitions of the SyncBlock within the period may be associated with a same SyncBlock index corresponding to a same beam or may be associated with different SyncBlock indices corresponding to different beams, or a maximum number of the one or more repetitions of the SyncBlock within the period is different per FR.
  • process 800 may further involve processor 712 determining satellite position assistance information based on a sign set of the PSS or SSS instances, wherein the satellite position assistance information may include a minimum or maximum elevation for one beam index.
  • process 800 may further involve processor 712 determining one or more of multiple REs within the PSS or the SSS, that have a higher received power than rest of the REs within the PSS or the SSS, and determining a number of repetitions of the SyncBlock within a period based on a number of the one or more determined REs within the PSS or the SSS.
  • FIG. 9 illustrates an example process 900 in accordance with an implementation of the present disclosure.
  • Process 900 may be an example implementation of above scenarios/schemes, whether partially or completely, with respect to enhancements on structure and pattern designs of synchronization block in wireless communications.
  • Process 900 may represent an aspect of implementation of features of network apparatus 720.
  • Process 900 may include one or more operations, actions, or functions as illustrated by one or more of blocks 910 and 920. Although illustrated as discrete blocks, various blocks of process 900 may be divided into additional blocks, combined into fewer blocks, or eliminated, depending on the desired implementation. Moreover, the blocks of process 900 may be executed in the order shown in FIG. 9 or, alternatively, in a different order.
  • Process 900 may be implemented by or in network apparatus 720 as well as any variations thereof. Solely for illustrative purposes and without limitation, process 900 is described below in the context of communication apparatus 710, as a UE, and network apparatus 720, as a network node. Process 900 may begin at block
  • process 900 may involve processor 722 of network apparatus 720 generating a SyncBlock comprising one or more instances of at least one of a PSS, a PBCH, and an SSS that is multiplexed into the PBCH in frequency domain.
  • Process 900 may proceed from block 910 to block 920.
  • process 900 may involve processor 722 transmitting, via transceiver 726, the SyncBlock to communication apparatus 710.
  • the SyncBlock may occupy 7, 14, or 28 symbols.
  • the SyncBlock may include at least one of the following: (i) one or more PSS instances, each occupies one or more symbols; (ii) one or more PBCH instances, each occupies multiple symbols; (iii) one or more SSS instances, each occupies the multiple symbols of one of the one or more PBCH instances; and (iv) one or more symbols that are empty or comprise contents other than the PSS, the PBCH, and the SSS.
  • each of the SSS instance may include an SSS sequence that is mapped to every several subcarriers in each symbol occupied by the PBCH instance.
  • one or more of the PSS or SSS instances may each include a sign reversal of a PSS or SSS, while rest of the PSS or SSS instances may each include the PSS or SSS.
  • one or more repetitions of the SyncBlock may be transmitted by network apparatus 720 within a period, and a sign set of the PSS instances in each of the repetitions may be different.
  • process 900 may further involve processor 722 transmitting, via transceiver 726, one or more repetitions of the SyncBlock within a period, wherein the one or more repetitions of the SyncBlock within the period may be associated with a same SyncBlock index corresponding to a same beam or may be associated with different SyncBlock indices corresponding to different beams, or a maximum number of the one or more repetitions of the SyncBlock within the period is different per FR.
  • a sign set of the PSS or SSS instances may indicate satellite position assistance information including a minimum or maximum elevation for one beam index.
  • one or more of multiple REs within the PSS or the SSS may be transmitted with a higher transmission power than rest of the REs within the PSS or the SSS, and a number of the one or more REs transmitted with the higher transmission power may correspond to a number of repetitions of the SyncBlock within a period. Additional Notes
  • any two components so associated can also be viewed as being “operably connected” , or “operably coupled” , to each other to achieve the desired functionality, and any two components capable of being so associated can also be viewed as being “operably couplable” , to each other to achieve the desired functionality.
  • operably couplable include but are not limited to physically mateable and/or physically interacting components and/or wirelessly interactable and/or wirelessly interacting components and/or logically interacting and/or logically interactable components.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne diverses solutions pour des améliorations sur la structure et des conceptions de motif de bloc de synchronisation dans des communications sans fil. Un appareil peut recevoir un bloc de synchronisation (SyncBlock) en provenance d'un nœud de réseau. Le SyncBlock peut comprendre une ou plusieurs instances d'un signal de synchronisation primaire (PSS) et/ou d'un canal de diffusion physique (PBCH) et/ou d'un signal de synchronisation secondaire (SSS) qui est multiplexé dans le PBCH dans le domaine fréquentiel. L'appareil peut accumuler la ou les instances du PSS et/ou du PBCH et/ou du SSS dans le SyncBlock. Ensuite, l'appareil peut effectuer une synchronisation avec le nœud de réseau sur la base de l'accumulation.
PCT/CN2025/087069 2024-04-24 2025-04-03 Procédés et appareil pour des améliorations concernant des conceptions de structure et de motif d'un bloc de synchronisation dans des communications sans fil Pending WO2025223174A1 (fr)

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CNPCT/CN2024/089639 2024-04-24
PCT/CN2024/089639 WO2025222418A1 (fr) 2024-04-24 2024-04-24 Schémas de recherche de cellule initiale

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PCT/CN2025/087069 Pending WO2025223174A1 (fr) 2024-04-24 2025-04-03 Procédés et appareil pour des améliorations concernant des conceptions de structure et de motif d'un bloc de synchronisation dans des communications sans fil

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US8665799B2 (en) * 2006-09-14 2014-03-04 Qualcomm Incorporated Beacon assisted cell search in a wireless communication system
US11997589B2 (en) * 2019-01-21 2024-05-28 Telefonaktiebolaget Lm Ericsson (Publ) IAB initial access
CN111294187B (zh) * 2019-07-05 2023-02-17 北京紫光展锐通信技术有限公司 初始接入方法及用户设备、计算机可读存储介质
US11705979B2 (en) * 2021-09-24 2023-07-18 Apple Inc. Joint detection for primary synchronization signal (PSS) and other synchronization signal symbols in target cell search

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