Schemes for synchronization block design and related issues
Novel synchronization block designs with alternative SSB structures and patterns address the challenges of low SNR and large CFO in NTN, enhancing synchronization signal detection and cell search for reliable communication.
Patent Information
- Application Number
- PCT/CN2024/087457
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-04-12
- Publication Date
- 2025-10-16
AI Technical Summary
In scenarios like Non-Terrestrial Networks (NTN) with lower workable Signal-to-Noise Ratio (SNR) and larger Carrier Frequency Offset (CFO), existing synchronization methods face challenges in quick cell search and synchronization signal detection.
Proposed novel synchronization block designs with alternative SSB structures and patterns, including different repetitions and beam sweeping/hopping strategies for PSS, SSS, and PBCH blocks, along with specific bit configurations to enhance detection efficiency and reliability.
Enables efficient and reliable communication by improving synchronization signal detection and cell search in challenging environments, ensuring better communication system performance.
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Figure CN2024087457_16102025_PF_FP_ABST
Abstract
Description
SCHEMES FOR SYNCHRONIZATION BLOCK DESIGN AND RELATED ISSUESFIELD
[0001] The invention discussed below relates generally to wireless communication, and more particularly, to methods for schemes for synchronization block design and related issues.BACKGROUND
[0002] In communication system, the initial access procedure is designed to enable a new user equipment (UE) to establish a connection with the network, acquire synchronization, and obtain the necessary resources to initiate communication. However, in some scenarios, like NTN, where there are lower workable SNR and larger CFO and quick cell search procedure, there are challenges for PSS, PBCH wi / o SSS. This disclosure addresses these challenges by proposing schemes for synchronization block design and related issues, ensuring efficient and reliable communication between networks and UEs in the communication network.SUMMARY
[0003] The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a preclude to the more detailed description that is presented later.
[0004] In one aspect, the methods of novel synchronization block design are proposed.
[0005] Considering some scenarios, like NTN, where there are lower workable SNR and larger CFO. However, to ensure quick cell search in such scenarios, novel initial access procedure and schemes for synchronization block design and related issues are necessary. This disclosure proposes methods for enabling UE to quickly cell search and detect the synchronization signal and information, so that to ensure better communication system.
[0006] To the accomplishment of the foregoing and related ends, the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed figures set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed, and this description is intended to include all such aspects and their equivalents.BRIEF DESCRIPTION OF THE DRAWINGS
[0007] FIG. 1 illustrates an exemplary diagram of New SSB structure.
[0008] FIG. 2 illustrates an exemplary diagram of New SSB structure.
[0009] FIG. 3 illustrates an exemplary diagram of New SSB structure.
[0010] FIG. 4 illustrates an exemplary diagram of New SSB structure.
[0011] FIG. 5 illustrates an exemplary diagram of New SSB structure.
[0012] FIG. 6 illustrates an exemplary diagram of New SSB structure.
[0013] FIG. 7 illustrates an exemplary diagram of New SSB structure.
[0014] FIG. 8 illustrates an exemplary diagram of New SSB structure.
[0015] FIG. 9 illustrates an exemplary diagram of New SSB structure.
[0016] FIG. 10 illustrates an exemplary diagram of New SSB structure.
[0017] FIG. 11 illustrates an exemplary diagram of New SSB structure.
[0018] FIG. 12 illustrates an exemplary diagram of New SSB structure.
[0019] FIG. 13 illustrates an exemplary diagram of New SSB structure.
[0020] FIG. 14 illustrates an exemplary diagram of New SSB structure.DETAILED DESCRIPTION
[0021] The detailed description set forth below in connection with the appended drawings is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well known structures and components are shown in block diagram form in order to avoid obscuring such concepts.
[0022] Several aspects of telecommunication systems will now be presented with reference to various apparatus and methods. These apparatus and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as “elements” ) . These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.
[0023] The schemes for synchronization block design and related issues mentioned in this disclosure represents the new synchronization block structure and new synchronization block pattern used. Moreover, synchronization Signal / PBCH block information & PBCH payload are proposed, where different PSS and / or SSS pattern can be utilized to transmit related information.
[0024] More specifically, we propose to consider the following alternatives:
[0025] Proposal#1: new synchronization block structure
[0026] Alternative #1 (One SSB occupies 28 symbols)
[0027] ● One SSB occupies 28 symbols (2 slot)
[0028] ● PSS with 8-time repetitions occupies 8 symbol, one repetition occupies one symbol
[0029] ● SSS with 2-time repetitions occupies 2 symbol, one repetition occupies one symbol
[0030] ● PBCH with 4-time repetitions occupies 8 / 12 symbol, one repetition occupies 2 / 3 symbols
[0031] ● M SSB repetitions (w / o beam sweeping / hopping) within one period
[0032] ■ Use the same SSB index for M repetitions corresponding to the same beam
[0033] ● Maximum N SSB numbers (with beam sweeping / hopping) within one SSB periodicity
[0034] ■ Use the different SSB index for different SSB corresponding to the different beam
[0035] ● FR1: N=16; FR2: N=64; FR3: N=256
[0036] ● SSB periodicity: 160 ms
[0037] Alternative #2 (One SSB occupies 14 symbols)
[0038] ● One SSB occupies 14 symbols (1 slot)
[0039] ● PSS with 4-time repetitions occupies 4 symbol, one repetition occupies one symbol
[0040] ● SSS with 1-time repetitions occupies 1 symbol, one repetition occupies one symbol
[0041] ● PBCH with 2-time repetitions occupies 4 / 6 symbol, one repetition occupies 2 / 3 symbols
[0042] ● M SSB repetitions (w / o beam sweeping / hopping) within one period
[0043] ■ Use the same SSB index for M repetitions corresponding to the same beam
[0044] ● Maximum N SSB numbers (with beam sweeping / hopping) within one SSB periodicity
[0045] ■ Use the different SSB index for different SSB corresponding to the different beam
[0046] ● FR1: N=16; FR2: N=64; FR3: N=256
[0047] ● SSB periodicity: 160 ms SSB periodicity: 160 ms
[0048] Alternative #3 (One SSB occupies 28 symbols)
[0049] ● One SSB occupies 28 symbols (2 slot)
[0050] ● PSS with 4-time repetitions occupies 8 symbol, one repetition occupies 2 symbols
[0051] ● SSS with 1-time repetitions occupies 2 symbol, one repetition occupies 2 symbols
[0052] ● PBCH with 4-time repetitions occupies 8 / 12 symbol, one repetition occupies 2 / 3 symbols
[0053] ● M SSB repetitions (w / o beam sweeping / hopping) within one period
[0054] ■ Use the same SSB index for M repetitions corresponding to the same beam
[0055] ● Maximum N SSB numbers (with beam sweeping / hopping) within one SSB periodicity
[0056] ■ Use the different SSB index for different SSB corresponding to the different beam
[0057] ● FR1: N=16; FR2: N=64; FR3: N=256
[0058] ● SSB periodicity: 160 ms
[0059] Alternative #4 (One SSB occupies 14 symbols)
[0060] ● One SSB occupies 14 symbols (1 slot)
[0061] ● PSS with 2-time repetitions occupies 4 symbol, one repetition occupies 2 symbols
[0062] ● SSS with 1-time repetitions occupies 1 symbol, one repetition occupies one symbol
[0063] ● PBCH with 2-time repetitions occupies 4 / 6 symbol, one repetition occupies 2 / 3 symbols
[0064] ● M SSB repetitions (w / o beam sweeping / hopping) within one period
[0065] ■ Use the same SSB index for M repetitions corresponding to the same beam
[0066] ● Maximum N SSB numbers (with beam sweeping / hopping) within one SSB periodicity
[0067] ■ Use the different SSB index for different SSB corresponding to the different beam
[0068] ● FR1: N=16; FR2: N=64; FR3: N=256
[0069] ● SSB periodicity: 160 ms
[0070] Alternative #5 (One SSB occupies 28 symbols)
[0071] ● One SSB occupies 28 symbols (2 slot) as illustrated in figure 1 and 2.
[0072] ● PSS with 8-time repetitions occupies 8 symbol, one repetition occupies one symbol
[0073] ● The sign set of 8 PSS repetitions is one of the candidate sign set from Proposal #2.
[0074] ● SSS with 2-time repetitions occupies 6 symbol, one repetition occupies 3 symbol
[0075] ● PBCH with 4-time repetitions occupies 12 symbol, one repetition occupies 3 symbols
[0076] ● M SSB repetitions (w / o beam sweeping) within one period
[0077] ■ Use the same SSB index for M repetitions corresponding to the same beam
[0078] ● Maximum N SSB numbers (with beam sweeping) within one SSB periodicity
[0079] ■ Use the different SSB index for different SSB corresponding to the different beam
[0080] ● FR1: N=16; FR2: N=64; FR3: N=256
[0081] ● SSB periodicity: 160 ms
[0082] Alternative #6 (One SSB occupies 14 symbols)
[0083] ● One SSB occupies 14 symbols (1 slot) as illustrated in figure 3 and 4.
[0084] ● PSS with 4-time repetitions occupies 8 symbol, one repetition occupies one symbol
[0085] ● The sign set of 4 PSS repetitions is one of the candidate sign set from Proposal #2.
[0086] ● SSS with 1-time repetitions occupies 3 symbol, one repetition occupies 3 symbol
[0087] ● PBCH with 2-time repetitions occupies 6 symbol, one repetition occupies 3 symbols
[0088] ● M SSB repetitions (w / o beam sweeping) within one period
[0089] ■ Use the same SSB index for M repetitions corresponding to the same beam
[0090] ● Maximum N SSB numbers (with beam sweeping) within one SSB periodicity
[0091] ■ Use the different SSB index for different SSB corresponding to the different beam
[0092] ● FR1: N=16; FR2: N=64; FR3: N=256
[0093] ● SSB periodicity: 160 ms
[0094] Proposal #2-1: New SSB pattern
[0095] One negative (sign reversal) PSS can be applied within one SSB, if 4 / 8 PSS repetitions are considered within one SSB to achieve better detection performance and improve detection efficiency.
[0096] Alternative #1 (One SSB with 8-time PSS repetitions)
[0097] ● PSS with 8-time repetitions
[0098] ● PSS repetition can be sequential symbols or not sequential symbols
[0099] ● The sign set of 8 PSS repetitions can be at least one candidate set of the following: {1, 1, -1, 1, 1, 1, 1, 1} or {1, 1, 1, -1, 1, 1, 1, 1} or {1, 1, 1, 1, -1, 1, 1, 1} or {1, 1, 1, 1, 1, -1, 1, 1} with maximum PSS peak value 8 and second maximum PSS peak value is not larger than 3, as illustrated in figure 5.
[0100] ● Different sign set can be utilized for different systems or SCS or frequency or band.
[0101] Alternative #2 (One SSB with 4-time PSS repetitions)
[0102] ● PSS with 4-time repetitions
[0103] ● PSS repetition can be sequential symbols or not sequential symbols
[0104] ● The sign set of 4 PSS repetitions can be at least one candidate set of the following: {1, -1, 1, 1} with maximum PSS peak value 4 and second maximum PSS peak value 1, as illustrated in figure 6.
[0105] ● Different sign set can be utilized for different systems or SCS or frequency or band.
[0106] Proposal #2-2: New SSB pattern
[0107] Two negative (sign reversal) PSS can be applied within one SSB, if 4 / 8 PSS repetitions are considered within one SSB to achieve better detection performance and improve detection efficiency.
[0108] Alternative #1 (One SSB with 8-time PSS repetitions)
[0109] ● PSS with 8-time repetitions
[0110] ● PSS repetition can be sequential symbols or not sequential symbols
[0111] ● The sign set of 8 PSS repetitions can be at least one candidate set of the following: {1, -1, 1, 1, - 1, 1, 1, 1} or {1, -1, 1, 1, 1, 1, 1, -1} or {1, 1, -1, -1, 1, 1, 1, 1} or {1, 1, -1, 1, -1, 1, 1, 1} or {1, 1, -1, 1, 1, 1, 1, -1} or {-1, 1, 1, -1, 1, 1, 1, 1} or {-1, 1, 1, 1, 1, -1, 1, 1} or {-1, 1, 1, 1, 1, 1, 1, -1} or {1, 1, 1, -1, -1, 1, 1, 1} or {1, 1, 1, -1, 1, -1, 1, 1} or {1, 1, 1, -1, 1, 1, -1, 1} or {1, 1, 1, 1, -1, -1, 1, 1} or {1, 1, 1, 1, -1, 1, 1, -1} or {1, 1, 1, 1, 1, -1, -1, 1} with maximum PSS peak value 8 and second maximum PSS peak value is not larger than 3, as illustrated in figure 7.
[0112] ● Different sign set can be utilized for different systems or SCS or frequency or band.
[0113] Alternative #2 (One SSB with 4-time PSS repetitions)
[0114] ● PSS with 4-time repetitions
[0115] ● PSS repetition can be sequential symbols or not sequential symbols
[0116] ● The sign set of 8 PSS repetitions can be at least one candidate set of the following: {-1, -1, 1, 1} or {-1, 1, 1, -1} or {1, -1, -1, 1} or {1, 1, -1, -1} with maximum PSS peak value 4 and second maximum PSS peak value is not larger than 2, as illustrated in figure 8.
[0117] ● Different sign set can be utilized for different systems or SCS or frequency or band.
[0118] Proposal #2-3: New SSB pattern
[0119] Three negative (sign reversal) PSS can be applied within one SSB, if 4 / 8 PSS repetitions are considered within one SSB to achieve better detection performance and improve detection efficiency.
[0120] Alternative #1 (One SSB with 8-time PSS repetitions)
[0121] ● PSS with 8-time repetitions
[0122] ● PSS repetition can be sequential symbols or not sequential symbols
[0123] ● The sign set of 8 PSS repetitions can be at least one candidate set of the following: {-1, -1, 1, -1, 1, 1, 1, 1} or {-1, -1, 1, 1, -1, 1, 1, 1} or {-1, -1, 1, 1, 1, -1, 1, 1} or {-1, -1, 1, 1, 1, 1, -1, 1} or {-1, -1, 1, 1, 1, 1, 1, -1} or {-1, 1, -1, -1, 1, 1, 1, 1} or {-1, 1, -1, 1, 1, -1, 1, 1} or {-1, 1, -1, 1, 1, 1, -1, 1} or {-1, 1, -1, 1, 1, 1, 1, -1} or {-1, 1, 1, -1, 1, -1, 1, 1} or {-1, 1, 1, -1, 1, 1, 1, -1} or {-1, 1, 1, 1, -1, 1, -1, 1} or {-1, 1, 1, 1, -1, 1, 1, -1} or {-1, 1, 1, 1, 1, -1, -1, 1} or {-1, 1, 1, 1, 1, -1, 1, -1} or {-1, 1, 1, 1, 1, 1, -1, -1} or {1, -1, -1, -1, 1, 1, 1, 1} or {1, -1, -1, 1, -1, 1, 1, 1} or {1, -1, -1, 1, 1, 1, -1, 1} or {1, -1, -1, 1, 1, 1, 1, -1} or {1, -1, 1, -1, -1, 1, 1, 1} or {1, -1, 1, -1, 1, 1, 1, -1} or {1, -1, 1, 1, 1, -1, -1, 1} or {1, -1, 1, 1, 1, -1, 1, -1} or {1, -1, 1, 1, 1, 1, -1, -1} or {1, 1, -1, -1, 1, -1, 1, 1} or {1, 1, -1, 1, -1, -1, 1, 1} or {1, 1, -1, 1, -1, 1, 1, -1} or {1, 1, -1, 1, 1, -1, 1, -1} or {1, 1, -1, 1, 1, 1, -1, -1} or {1, 1, 1, -1, -1, 1, -1, 1} or {1, 1, 1, -1, 1, -1, -1, 1} or {1, 1, 1, -1, 1, 1, -1, -1} or {1, 1, 1, 1, -1, -1, -1, 1} or {1, 1, 1, 1, -1, -1, 1, -1} or {1, 1, 1, 1, -1, 1, -1, -1} with maximum PSS peak value 8 and second maximum PSS peak value is not larger than 3, as illustrated in figure 9.
[0124] ● Different sign set can be utilized for different systems or SCS or frequency or band.
[0125] Alternative #2 (One SSB with 4-time PSS repetitions)
[0126] ● PSS with 4-time repetitions
[0127] ● PSS repetition can be sequential symbols or not sequential symbols
[0128] ● The sign set of 8 PSS repetitions can be at least one candidate set of the following: {-1, -1, -1, 1} or {-1, -1, 1, -1} or {1, -1, -1, -1} with maximum PSS peak value 4 and second maximum PSS peak value is not larger than 1, as illustrated in figure 10.
[0129] ● Different sign set can be utilized for different systems or SCS or frequency or band.
[0130] Proposal #2-4: New SSB pattern
[0131] Four negative (sign reversal) PSS can be applied within one SSB, if 4 / 8 PSS repetitions are considered within one SSB to achieve better detection performance and improve detection efficiency.
[0132] Alternative #1 (One SSB with 8-time PSS repetitions)
[0133] ● PSS with 8-time repetitions
[0134] ● PSS repetition can be sequential symbols or not sequential symbols
[0135] ● The sign set of 8 PSS repetitions can be at least one candidate set of the following: {-1, -1, -1, 1, -1, 1, 1, 1} or {-1, -1, -1, 1, 1, -1, 1, 1} or {-1, -1, -1, 1, 1, 1, -1, 1} or {-1, -1, 1, -1, -1, 1, 1, 1} or {-1, -1, 1, -1, 1, -1, 1, 1} or {-1, -1, 1, -1, 1, 1, 1, -1} or {-1, -1, 1, 1, -1, 1, -1, 1} or {-1, -1, 1, 1, 1, -1, 1, -1} or {-1, 1, -1, -1, -1, 1, 1, 1} or {-1, 1, -1, -1, 1, 1, -1, 1} or {-1, 1, -1, -1, 1, 1, 1, -1} or {-1, 1, -1, 1, -1, -1, 1, 1} or {-1, 1, -1, 1, 1, -1, -1, 1} or {-1, 1, -1, 1, 1, 1, -1, -1} or {-1, 1, 1, -1, -1, 1, -1, 1} or {-1, 1, 1, 1, -1, -1, 1, -1} or {-1, 1, 1, 1, -1, 1, -1, -1} or {1, -1, -1, -1, 1, -1, 1, 1} or {1, -1, -1, -1, 1, 1, -1, 1} or {1, -1, -1, 1, 1, -1, 1, -1} or {1, -1, 1, -1, -1, -1, 1, 1} or {1, -1, 1, -1, -1, 1, 1, -1} or {1, -1, 1, -1, 1, 1, -1, -1} or {1, -1, 1, 1, -1, -1, -1, 1} or {1, -1, 1, 1, -1, -1, 1, -1} or {1, -1, 1, 1, 1, -1, -1, -1} or {1, 1, -1, -1, -1, 1, -1, 1} or {1, 1, -1, -1, 1, -1, 1, -1} or {1, 1, -1, 1, -1, -1, -1, 1} or {1, 1, -1, 1, -1, 1, -1, -1} or {1, 1, -1, 1, 1, -1, -1, -1} or {1, 1, 1, -1, -1, -1, 1, -1} or {1, 1, 1, -1, -1, 1, -1, -1} or {1, 1, 1, - 1, 1, -1, -1, -1} with maximum PSS peak value 8 and second maximum PSS peak value is not larger than 3, as illustrated in figure 11.
[0136] ● Different sign set can be utilized for different systems or SCS or frequency or band.
[0137] Proposal #2-5: New SSB pattern
[0138] Five negative (sign reversal) PSS can be applied within one SSB, if 4 / 8 PSS repetitions are considered within one SSB to achieve better detection performance and improve detection efficiency.
[0139] Alternative #1 (One SSB with 8-time PSS repetitions)
[0140] ● PSS with 8-time repetitions
[0141] ● PSS repetition can be sequential symbols or not sequential symbols
[0142] ● The sign set of 8 PSS repetitions can be at least one candidate set of the following: {-1, -1, -1, -1, 1, -1, 1, 1} or {-1, -1, -1, -1, 1, 1, -1, 1} or {-1, -1, -1, -1, 1, 1, 1, -1} or {-1, -1, -1, 1, -1, -1, 1, 1} or {-1, -1, -1, 1, -1, 1, 1, -1} or {-1, -1, -1, 1, 1, -1, 1, -1} or {-1, -1, 1, -1, -1, -1, 1, 1} or {-1, -1, 1, -1, -1, 1, -1, 1} or {-1, -1, 1, -1, 1, -1, -1, 1} or {-1, -1, 1, -1, 1, 1, -1, -1} or {-1, -1, 1, 1, -1, 1, -1, -1} or {-1, 1, -1, -1, -1, -1, 1, 1} or {-1, 1, -1, -1, -1, 1, -1, 1} or {-1, 1, -1, -1, -1, 1, 1, -1} or {-1, 1, -1, 1, -1, -1, -1, 1} or {-1, 1, -1, 1, 1, -1, -1, -1} or {-1, 1, 1, -1, -1, -1, -1, 1} or {-1, 1, 1, -1, -1, -1, 1, -1} or {-1, 1, 1, -1, 1, -1, -1, -1} or {-1, 1, 1, 1, -1, -1, -1, -1} or {1, -1, -1, -1, -1, -1, 1, 1} or {1, -1, -1, -1, -1, 1, -1, 1} or {1, -1, -1, -1, -1, 1, 1, -1} or {1, -1, -1, -1, 1, -1, -1, 1} or {1, -1, -1, -1, 1, -1, 1, -1} or {1, -1, -1, 1, -1, -1, -1, 1} or {1, -1, -1, 1, -1, 1, -1, -1} or {1, -1, 1, -1, -1, -1, -1, 1} or {1, -1, 1, -1, -1, -1, 1, -1} or {1, -1, 1, -1, -1, 1, -1, -1} or {1, -1, 1, 1, -1, -1, -1, -1} or {1, 1, -1, -1, -1, -1, -1, 1} or {1, 1, -1, -1, -1, -1, 1, -1} or {1, 1, -1, -1, -1, 1, -1, -1} or {1, 1, -1, -1, 1, -1, -1, -1} or {1, 1, -1, 1, -1, -1, -1, -1} with maximum PSS peak value 8 and second maximum PSS peak value is not larger than 3, as illustrated in figure 12.
[0143] ● Different sign set can be utilized for different systems or SCS or frequency or band.
[0144] Proposal #2-6: New SSB pattern
[0145] Six negative (sign reversal) PSS can be applied within one SSB, if 4 / 8 PSS repetitions are considered within one SSB to achieve better detection performance and improve detection efficiency.
[0146] Alternative #1 (One SSB with 8-time PSS repetitions)
[0147] ● PSS with 8-time repetitions
[0148] ● PSS repetition can be sequential symbols or not sequential symbols
[0149] ● The sign set of 8 PSS repetitions can be at least one candidate set of the following: {-1, -1, -1, -1, -1, 1, 1, -1} or {-1, -1, -1, -1, 1, -1, -1, 1} or {-1, -1, -1, -1, 1, 1, -1, -1} or {-1, -1, -1, 1, -1, -1, 1, -1} or {-1, -1, -1, 1, -1, 1, -1, -1} or {-1, -1, -1, 1, 1, -1, -1, -1} or {-1, -1, 1, -1, -1, -1, -1, 1} or {-1, -1, 1, -1, 1, -1, -1, -1} or {-1, -1, 1, 1, -1, -1, -1, -1} or {-1, 1, -1, -1, 1, -1, -1, 1} or {-1, 1, -1, -1, -1, -1, 1, -1} or {-1, 1, -1, -1, 1, -1, -1, -1} or {-1, 1, 1, -1, -1, -1, -1, -1} or {1, -1, -1, -1, -1, -1, -1, 1} or {1, -1, -1, -1, -1, -1, 1, -1} or {1, -1, -1, -1, -1, 1, -1, -1} or {1, -1, -1, 1, -1, -1, -1, -1} with maximum PSS peak value 8 and second maximum PSS peak value is not larger than 3, as illustrated in figure 13.
[0150] ● Different sign set can be utilized for different systems or SCS or frequency or band.
[0151] Proposal #2-7: New SSB pattern
[0152] Seven negative (sign reversal) PSS can be applied within one SSB, if 4 / 8 PSS repetitions are considered within one SSB to achieve better detection performance and improve detection efficiency.
[0153] Alternative #1 (One SSB with 8-time PSS repetitions)
[0154] ● PSS with 8-time repetitions
[0155] ● PSS repetition can be sequential symbols or not sequential symbols
[0156] ● The sign set of 8 PSS repetitions can be at least one candidate set of the following: {-1, -1, -1, -1, -1, 1, -1, -1} or {-1, -1, -1, -1, 1, -1, -1, -1} or {-1, -1, -1, 1, -1, -1, -1, -1} or {-1, -1, 1, -1, -1, -1, -1, -1} with maximum PSS peak value 8 and second maximum PSS peak value is not larger than 3, as illustrated in figure 14.
[0157] ● Different sign set can be utilized for different systems or SCS or frequency or band.
[0158] Proposal #3: Synchronization Signal / PBCH block information & PBCH payload
[0159] The PBCH has at least one of the following bits in table 1:
[0160] Table 1
[0161] Note 1: 24 bits CRC need to be added for total PBCH payload calculation.
[0162] Note 2: At least one of the following information, part of the information bits or whole information bits, can be delivered by different PSS and / or SSS pattern within one Synchronization Signal / PBCH block / one specific duration (e.g. 2 slots / 28 symbols) : systemFrameNumber, subCarrierSpacingCommon, ssb-SubcarrierOffset, partEARFCN, pdcch-ConfigSIB1, cellBarred, intraFreqReselection, Synchronization Signal / PBCH block index.
[0163] Proposal #4: Different PSS and / or SSS pattern to transmit information
[0164] 1. Different PSS repetition numbers within one Synchronization Signal / PBCH block / one specific duration (e.g. 2 slots / 28 symbols) can be utilized to distinguish different systems (NTN / FR2 TN / LP / TN / …) . For example, there are L PSS peaks within one Synchronization Signal / PBCH block / one specific duration (e.g. 2 slots / 28 symbols) , after PSS correlation calculation, two PSS peak can be seen as two PSS repetition,
[0165] ● if Thr_2<L<= Thr_1, it is A system (e.g. IoT NTN) ;
[0166] ● if Thr_3<L<= Thr_2, it is B system (e.g. NR NTN) ;
[0167] ● if Thr_4<L<= Thr_3, it is C system (e.g. LP) ;
[0168] ● else, it is D system (e.g. TN)
[0169] Note 1: Thr_1 / 2 / 3 / 4 can be predefined value and Thr_1 / 2 / 3 / 4 can be default.
[0170] Note 2: A / B / C system can be consisted of one or more systems. For example, if Thr_2<L<= Thr_1, it is NTN or FR2 TN systems.
[0171] 2. Different subsequential PSS repetition numbers within one Synchronization Signal / PBCH block / one specific duration (e.g. 2 slots / 28 symbols) can be utilized to distinguish different systems (NTN / FR2 TN / LP / TN / …) or inidcate partial / full bits of systemFrameNumber, subCarrierSpacingCommon, ssb-SubcarrierOffset, partEARFCN, pdcch-ConfigSIB1, cellBarred, intraFreqReselection, Synchronization Signal / PBCH block index. For example, there are P subsequential PSS peaks within one Synchronization Signal / PBCH block / one specific duration (e.g. 2 slots / 28 symbols) , after PSS correlation calculation, two PSS peak can be seen as two PSS repetition, the information as indicated in the following table 2:
[0172] Table 2
[0173] 3. Different number of negative (sign reversal) PSS peaks within one Synchronization Signal / PBCH block / one specific duration (e.g. 2 slots / 28 symbols) can be utilized to utilized to distinguish different systems (NTN / FR2 TN / LP / TN / …) or inidcate partial / full bits of systemFrameNumber, subCarrierSpacingCommon, ssb-SubcarrierOffset, partEARFCN, pdcch-ConfigSIB1, cellBarred, intraFreqReselection, Synchronization Signal / PBCH block index. For example, there are Q negative PSS peaks within one Synchronization Signal / PBCH block / one specific duration (e.g. 2 slots / 28 symbols) , after PSS correlation calculation, two PSS peak can be seen as two PSS repetition, the information as indicated in the following table 3:
[0174] Table 3
[0175] 4. Different positions of SSS within one Synchronization Signal / PBCH block / one specific duration (e.g. 2 slots / 28 symbols) can be utilized to utilized to inidcate partial / full bits of systemFrameNumber, subCarrierSpacingCommon, ssb-SubcarrierOffset, partEARFCN, pdcch-ConfigSIB1, cellBarred, intraFreqReselection, Synchronization Signal / PBCH block index
[0176] The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown herein, but is to be accorded the full scope consistent with the language claims, wherein reference to an element in the singular is not intended to mean “one and only one” unless specifically so stated, but rather “one or more. ” The word “exemplary” is used herein to mean “serving as an example, instance, or illustration. ” Any aspect described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other aspects. Unless specifically stated otherwise, the term “some” refers to one or more. Combinations such as “at least one of A, B, or C, ” “one or more of A, B, or C, ” “at least one of A, B, and C, ” “one or more of A, B, and C, ” and “A, B, C, or any combination thereof” include any combination of A, B, and / or C, and may include multiples of A, multiples of B, or multiples of C. Specifically, combinations such as “at least one of A, B, or C, ” “one or more of A, B, or C, ” “at least one of A, B, and C, ” “one or more of A, B, and C, ” and “A, B, C, or any combination thereof” may be A only, B only, C only, A and B, A and C, B and C, or A and B and C, where any such combinations may contain one or more member or members of A, B, or C. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims. The words “module, ” “mechanism, ” “element, ” “UE, ” and the like may not be a substitute for the word “means. ” As such, no claim element is to be construed as a means plus function unless the element is expressly recited using the phrase “means for. ”
[0177] While aspects of the present disclosure have been described in conjunction with the specific embodiments thereof that are proposed as examples, alternatives, modifications, and variations to the examples may be made. Accordingly, embodiments as set forth herein are intended to be illustrative and not limiting. There are changes that may be made without departing from the scope of the claims set forth below.
Claims
1.A method of new synchronization structure and pattern to ensure quick initial cell search.2.The method of claim 1, wherein the new synchronization structure including one synchronization block (SSB) occupies 28 symbols or 14 symbols.3.The method of claim 1, wherein M SSB repetitions (w / o beam sweeping / hopping) within one period.4.The method of claim 3, wherein the same SSB index for M repetitions are used to the same beam.5.The method of claim 1, wherein there are Maximum N SSB numbers (with beam sweeping / hopping) within one SSB periodicity.6.The method of claim 5, wherein different SSB indexes are used for different SSB corresponding to the different beam.7.The method of claim 5, wherein for FR1: N=16; for FR2: N=64; for FR3: N=256.8.The method of claim 1, wherein the synchronization block periodicity is 160ms.9.The method of claim 2, if one synchronization block occupies 28 symbols, PSS with 8-time repetitions occupies 8 symbol, one repetition occupies one symbol, SSS with 2-time repetitions occupies 2 symbol, one repetition occupies one symbol, PBCH with 4-time repetitions occupies 8 / 12 symbol, one repetition occupies 2 / 3 symbols;or PSS with 4-time repetitions occupies 8 symbol, one repetition occupies 2 symbols,SSS with 1-time repetitions occupies 2 symbol, one repetition occupies 2 symbols,PBCH with 4-time repetitions occupies 8 / 12 symbol, one repetition occupies 2 / 3 symbols.10.The method of claim 2, if one synchronization block occupies 14 symbols, PSS with 4-time repetitions occupies 4 symbol, one repetition occupies one symbol, SSS with 1-time repetitions occupies 1 symbol, one repetition occupies one symbol, PBCH with 2-time repetitions occupies 4 / 6 symbol, one repetition occupies 2 / 3 symbols;or PSS with 2-time repetitions occupies 4 symbol, one repetition occupies 2 symbols,SSS with 1-time repetitions occupies 1 symbol, one repetition occupies one symbol,PBCH with 2-time repetitions occupies 4 / 6 symbol, one repetition occupies 2 / 3 symbols.11.The method of claim 1, wherein the new synchronization block pattern includes at least one negative (sign reversal) PSS within one SSB.12.The method of claim 11, wherein the Different sign set can be utilized for different systems or SCS or frequency or band.13.The method of claim 1, wherein the Synchronization Signal / PBCH block information &PBCH payload has at least one of the following parameters:systemFrameNumber, subCarrierSpacingCommon, ssb-SubcarrierOffset, partEARFCN, pdcch-ConfigSIB1, cellBarred, intraFreqReselection, Synchronization Signal / PBCH block index, spare.14.The method of claim 13, wherein at least one of the following information, part of the information bits or whole information bits, can be delivered by different PSS and / or SSS pattern within one Synchronization Signal / PBCH block / one specific duration: systemFrameNumber, subCarrierSpacingCommon, ssb-SubcarrierOffset, partEARFCN, pdcch-ConfigSIB1, cellBarred, intraFreqReselection, Synchronization Signal / PBCH block index.15.The method of claim 13, wherein subcarrier spacing for SIB1, Msg. 2 / 4 and MsgB for initial access, paging and broadcast SI-messages; {15 or 60 or 30, 30 or 120 or 60} corresponds to FR1: 15 / 30, FR2: 60 / 120, FR3: 30 / 60; Alternatively, {15 or 120 or 30, 30 or 240 or 60} corresponds to FR1: 15 / 30, FR2: 120 / 240, FR3: 30 / 60.16.The method of claim 1, wherein different PSS repetition numbers within one Synchronization Signal / PBCH block / one specific duration are utilized to distinguish different systems.17.The method of claim 1, wherein different subsequential PSS repetition numbers within one Synchronization Signal / PBCH block / one specific duration are utilized to distinguish different systems or inidcate partial / full bits of systemFrameNumber, subCarrierSpacingCommon, ssb-SubcarrierOffset, partEARFCN, pdcch-ConfigSIB1, cellBarred, intraFreqReselection, Synchronization Signal / PBCH block index.18.The method of claim 1, wherein different number of negative (sign reversal) PSS peaks within one Synchronization Signal / PBCH block / one specific duration are utilized to utilized to distinguish different systems or inidcate partial / full bits of systemFrameNumber, subCarrierSpacingCommon, ssb-SubcarrierOffset, partEARFCN, pdcch-ConfigSIB1, cellBarred, intraFreqReselection, Synchronization Signal / PBCH block index.19.The method of claim 1, wherein different positions of SSS within one Synchronization Signal / PBCH block / one specific duration are utilized to utilized to inidcate partial / full bits of systemFrameNumber, subCarrierSpacingCommon, ssb-SubcarrierOffset, partEARFCN, pdcch-ConfigSIB1, cellBarred, intraFreqReselection, Synchronization Signal / PBCH block index.
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