WO2025199680A1 - Methods of synchronization block design - Google Patents
Methods of synchronization block designInfo
- Publication number
- WO2025199680A1 WO2025199680A1 PCT/CN2024/083571 CN2024083571W WO2025199680A1 WO 2025199680 A1 WO2025199680 A1 WO 2025199680A1 CN 2024083571 W CN2024083571 W CN 2024083571W WO 2025199680 A1 WO2025199680 A1 WO 2025199680A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- syncblock
- shot
- pss
- pbch
- sss
- 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
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/0015—Synchronization between nodes one node acting as a reference for the others
Definitions
- the invention discussed below relates generally to wireless communication, and more particularly, to methods for synchronization block pattern design.
- the signal-to-noise ratio received by the receiver from the transmitter is often low due to poor background environment or long communication distances.
- time or frequency domain signal accumulation techniques are employed.
- the transmitter repeats the transmission of a segment of the same signal, while the receiver accumulates all the repeated signals for detection, demodulation, or decoding, or accumulates the detection or demodulation results of each repeated signal segment as the final result.
- this patent proposes a method for synchronization signal and information pattern design sent by the transmitter to enhance the success rate of detection or decoding at the receiver.
- the method of synchronization block (SyncBlock) design including the SyncBlock content, periodicity, location in time domain, size in time domain and resource.
- PSS/SSS/PBCH shot pattern design within a SyncBlock including the shot definition, shot size, shot location in time domain and shot content.
- FIG. 3 illustrates another exemplary diagram of PSS, SSS and PBCH shot pattern design.
- the SyncBlock periodicity start symbol is the SyncBlock location reference point in time domain
- SyncBlock One or multiple SyncBlock (s) is within a SyncBlock periodicity, and each SyncBlock can be described using the method of alternative#1.
- the one or multiple SyncBlock (s) within the same SyncBlock periodicity is transmitted by the transmitter via the same beam or different beam.
- the one or multiple SyncBlock (s) within the same SyncBlock periodicity have the same structure and/or pattern, and have different time domain locations.
- FIG. 1 an exemplary diagram of SyncBlock design is descripted.
- Both SyncBlock 1 and SyncBlock 2 occurs periodically according to the SyncBlock periodicity.
- PSS PSS, SSS or PBCH shot pattern
- the shot content of each PSS, SSS or PBCH shot within the same SyncBlock can be the same or different.
- the payload of the 1 st PBCH shot and 2 nd PBCH shot can be the same or different.
- the shot pattern design in the alternative#2 can be applied for all of PSS, SSS and PBCH.
- FIG. 2 For example, as is shown is Figure 2, an exemplary diagram of shot pattern design within a SyncBlock is descripted. There are 3 PSS shots, 4 PBCH shots and 3 SSS shots within the SyncBlock.
- an exemplary diagram of shot pattern design within a SyncBlock is descripted.
- PSS shots and PBCH shots occur within the same SyncBlock.
- 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.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Due to different background environment, communication distances and country/region regulations, different pattern of synchronization signal and information need to proposed. In one aspect, the method of synchronization block (SyncBlock) design is proposed, including the SyncBlock content, periodicity, location in time domain, size in time domain and resource. In another aspect, PSS/SSS/PBCH shot pattern design within a SyncBlock is proposed, including the shot definition, shot size, shot location in time domain and shot content. In another aspect of the disclosure, the method of PSS shot pattern design for detection performance enhancement is proposed. The aim of the PSS shot pattern design is to let the gap between the PSS shot(s) within the SyncBlock(s) be different from each other. Several typical examples are shown in the disclosure..
Description
The invention discussed below relates generally to wireless communication, and more particularly, to methods for synchronization block pattern design.
In wireless communication, the signal-to-noise ratio received by the receiver from the transmitter is often low due to poor background environment or long communication distances. To address the issue of low signal-to-noise ratio leading to low success rates in signal detection, demodulation, and decoding at the receiver, time or frequency domain signal accumulation techniques are employed. The transmitter repeats the transmission of a segment of the same signal, while the receiver accumulates all the repeated signals for detection, demodulation, or decoding, or accumulates the detection or demodulation results of each repeated signal segment as the final result.
In the scenario of time domain signal repetition at the transmitter, the repetition of signals at different intervals by the transmitter can impact the success rate of detection or decoding at the receiver. Based on this, this patent proposes a method for synchronization signal and information pattern design sent by the transmitter to enhance the success rate of detection or decoding at the receiver.
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.
In one aspect, the method of synchronization block (SyncBlock) design is proposed, including the SyncBlock content, periodicity, location in time domain, size in time domain and resource.
In another aspect, PSS/SSS/PBCH shot pattern design within a SyncBlock is proposed, including the shot definition, shot size, shot location in time domain and shot content.
In another aspect of the disclosure, the method of PSS shot pattern design for detection performance enhancement is proposed. The aim of the PSS shot pattern design is to let the gap between the PSS shot (s) within the SyncBlock (s) be different from each other. Several typical examples are shown in the disclosure.
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.
FIG. 1 illustrates an exemplary diagram of SyncBlock pattern design.
FIG. 2 illustrates an exemplary diagram of PSS, SSS and PBCH shot pattern design.
FIG. 3 illustrates another exemplary diagram of PSS, SSS and PBCH shot pattern design.
FIG. 4 illustrates an exemplary diagram of the method of PSS shot pattern design for detection performance enhancement.
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.
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.
In one aspect of the disclosure, the synchronization block (SyncBlock) design is proposed. More specifically, we propose to consider the following alternatives:
Alternative#1: SyncBlock design
1. Content:
a) the content of the SyncBlock is at least one of the following: PSS (s) , SSS (s) , PBCH (s)
b) aside from the PSS (s) , SSS (s) and/or PBCH (s) symbols, there can be one or multiple symbols within the SyncBlock that is empty, or used for other transmitting contents (e.g., signals other than PSS and SSS, channels other than PBCH, etc. ) .
c) the (pre-) defined content of the SyncBlock can be different for different SCS, and/or bandwidth part (BW) , and/or different frequency band.
2. Periodicity:
a) The SyncBlock periodicity is (pre-) defined
b) The SyncBlock periodicity start symbol is the SyncBlock location reference point in time domain
c) The SyncBlock periodicity start symbol is described by a offset value to a reference symbol, and/or slot, and/or frame, and/or half frame, and/or SFN, etc.
3. Location in time domain:
a) The location of the SyncBlock in time domain within a SyncBlock periodicity is described by a offset value to the SyncBlock periodicity start symbol, (i.e., SyncBlock location reference point)
4. SyncBlock size in time domain:
a) The SyncBlock size is either one or multiple symbols, or slots.
b) The first and last symbol of the SyncBlock is either PSS, SSS, PBCH symbol, an empty symbol, or a symbol for other transmission purpose.
5. Resource:
a) Frequency resource: the SyncBlock can occupy different (pre-) defined frequency bandwidth for different SCS, and/or bandwidth part (BW) , and/or different frequency band; the SyncBlock frequency center location in frequency domain can be different for different SCS, and/or bandwidth part (BW) , and/or different frequency band.
b) Time resource: the (pre-) defined time resource (e.g., the SyncBlock periodicity, and/or size, location within the periodicity, etc. ) of the SyncBlock can be different for different SCS, and/or bandwidth part (BW) , and/or different frequency band.
Note for alternative 1:
- One or multiple SyncBlock (s) is within a SyncBlock periodicity, and each SyncBlock can be described using the method of alternative#1.
- The one or multiple SyncBlock (s) within the same SyncBlock periodicity is transmitted by the transmitter via the same beam or different beam.
- The one or multiple SyncBlock (s) within the same SyncBlock periodicity have the same structure and/or pattern, and have different time domain locations.
- For example, as is shown in Figure 1, an exemplary diagram of SyncBlock design is descripted. The SyncBlock location reference point is the start symbol of the SyncBlock periodicity in the diagram, which is represented as t=0. The SyncBlock 1’s location in time domain is represented as t=offset 1, the SyncBlock 2’s location in time domain is represented as t=offset 2. Both SyncBlock 1 and SyncBlock 2 occurs periodically according to the SyncBlock periodicity.
Alternative#2: PSS/SSS/PBCH shot pattern design within a SyncBlock
1. Shot definition:
a) a PSS/SSS/PBCH shot represents for a PSS signal, SSS signal, or PBCH channel (as well as the embedded reference signal) respectively.
2. Shot size:
a) the size/length of a shot is (pre-) defined, and can be one or multiple symbols.
b) The length of the PSS, SSS and PBCH shot is independent with each other, i.e., length of the PSS, SSS and PBCH shot with in the same SyncBlock is either same or different
3. Shot location in time domain:
a) The location of the first symbol of a shot in time domain within a SyncBlock is described by a offset value to the SyncBlock start symbol, (i.e., shot location reference point)
b) The location of all the PSS, SSS or PBCH shots in time domain within a SyncBlock is called the PSS, SSS or PBCH shot pattern.
c) The location of the PSS, SSS and PBCH shots within the same SyncBlock is independent with each other
d) The location of the PSS shots, SSS shots and PBCH shots within the same SyncBlock will not overlap with each other
4. Shot content:
a) The shot content of each PSS, SSS or PBCH shot within the same SyncBlock can be the same or different. For example, the payload of the 1st PBCH shot and 2nd PBCH shot can be the same or different.
Note for alternative 2:
- The shot pattern design in the alternative#2 can be applied for all of PSS, SSS and PBCH.
- The PSS/SSS/PBCH shot pattern within different SyncBlocks in the same SyncBlock periodicity is the same.
- At least one of the PSS shot (s) , SSS shot (s) and PBCH shot (s) occur within a SyncBlock.
- For example, as is shown is Figure 2, an exemplary diagram of shot pattern design within a SyncBlock is descripted. There are 3 PSS shots, 4 PBCH shots and 3 SSS shots within the SyncBlock.
- For another example, as is shown in Figure 3, an exemplary diagram of shot pattern design within a SyncBlock is descripted. There are 4 PSS shots and 4 PBCH shots within the SyncBlock. The shot location reference point is the start symbol of the SyncBlock periodicity in the diagram, which is represented as t=0. The PSS shot 1’s location in time domain is represented as t=offset 1, the PSS shot 2’s location in time domain is represented as t=offset 2, the PSS shot 3’s location in time domain is represented as t=offset 3, the PSS shot 4’s location in time domain is represented as t=offset 4. Similarly, the PBCH shot 1, shot 2, shot 3 and shot 4’s location in time domain is represented as t=offset a, t=offset b, t=offset c and t=offset d
respectively. Both PSS shots and PBCH shots occur within the same SyncBlock.
- The PSS shot (s) , SSS shot (s) and PBCH shot (s) occur within the same SyncBlock is transmitted by the same beam of the transmitter.
In another aspect of the disclosure, the method of PSS shot pattern design for detection performance enhancement is proposed. In case of time domain signal repetition at the transmitter, the repetition of signals at different intervals by the transmitter can impact the success rate of detection or decoding at the receiver. Based on this, the aim of the PSS shot pattern design is to let the gap between the PSS shot (s) within the SyncBlock (s) be different from each other. To describe the problem in a simpler way, we can simplify the problem scenario as: to find a sequence made of 0 and 1 that has the best correlation property with its time delayed version (e.g., different lags) , and the length of the sequence is the same as the SyncBlock size in time domain. The first symbol of each shot within the SyncBlock can be represented as the non-zero element position of the sequence.
More specifically, we propose to consider the following alternatives:
Alternative#3: method of PSS shot pattern design for detection performance enhancement The non-zero elements position within the sequence S can be represented as:
Idx= {a1, a2, …, aN}
Idx= {a1, a2, …, aN}
Where the length of the Idx is N, equal to the number of the PSS shots within the SyncBlock.
The sequence S can be represented as:
Where M is the sequence length. The sequence S should aim at obtain a C, and maximize the distance between the max value of C and the second max value of C:
C (i) =S (m) *S (m+i) ′, i=-M+1, …M-1
C (i) =S (m) *S (m+i) ′, i=-M+1, …M-1
Where S′ represents the transpose of S, and/or the sequence S should aim at a C2, and maximize the distance between the max value of C2 and the second max value of C2:
C2 (i) =Sq (m) *S (m) ′, q=-M+1, …M-1
C2 (i) =Sq (m) *S (m) ′, q=-M+1, …M-1
Where Sq (m) represents the cyclic shift version of S, q represents the cyclic shift length.
Note for alternative 3:
- For example, as is shown in Figure 4, the sequence S= {1 1 0 1 0 0 0 1} , Idx= {0 1 3 7} , C= {1 1 0 1 1 1 1 4 1 1 1 1 0 1 1} . There are 4 PSS shots within the SyncBlock, and the position of the first symbol of each PSS shot can be represented as: {0 1 3 7} +offset 1, where the offset 1 represents for the offset value of the first symbol of PSS shot 1 and the start symbol of the SyncBlock.
- For another example, some of the possible sequence S and PSS pattern within a SyncBlock is in the following table:
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. ”
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 (19)
- A method of synchronization block design, wherein the synchronization block design includes (SyncBlock) .
- The method of claim 1, wherein the SyncBlock content is at least one of the following: PSS (s) , SSS (s) , PBCH (s) and there can be one or multiple symbols within the SyncBlock that is empty, or used for other transmitting contents, the (pre-) defined content of the SyncBlock can be different for different SCS, and/or bandwidth part (BW) , and/or different frequency band.
- The method of claim 1, wherein the SyncBlock periodicity is (pre-) defined, the start symbol of the SyncBlock is the SyncBlock location reference point in time domain, and the SyncBlock periodicity start symbol is described by an offset value to a reference symbol, and/or slot, and/or frame, and/or half frame, and/or SFN, etc.
- The method of claim 1, wherein the location of the SyncBlock in time domain within a SyncBlock periodicity is described by an offset value to the SyncBlock periodicity start symbol.
- The method of claim 1, wherein SyncBlock size in time domain is either one or multiple symbols, or slots, the first and last symbol of the SyncBlock is either PSS, SSS, PBCH symbol, an empty symbol, or a symbol for other transmission purpose.
- The method of claim 1, wherein the SyncBlock occupies different (pre-) defined frequency bandwidth for different SCS, and/or bandwidth part (BW) , and/or different frequency band; the SyncBlock frequency center location in frequency domain can be different for different SCS, and/or bandwidth part (BW) , and/or different frequency band.
- The method of claim 1, wherein the (pre-) defined time resource of the SyncBlock is different for different SCS, and/or bandwidth part (BW) , and/or different frequency band.
- The method of claim 1, wherein one or multiple SyncBlock (s) is within a SyncBlock periodicity, and each SyncBlock can be described using the method of alternative#1, the one or multiple SyncBlock (s) within the same SyncBlock periodicity is transmitted by the transmitter via the same beam or different beam, the one or multiple SyncBlock (s) within the same SyncBlock periodicity have the same structure and/or pattern, and have different time domain locations.
- The method of claim 1, wherein the PSS/SSS/PBCH shot pattern design within a SyncBlock.
- The method of claim 9, wherein a PSS/SSS/PBCH shot represents for a PSS signal, SSS signal, or PBCH channel (as well as the embedded reference signal) respectively.
- The method of claim 9, wherein the size/length of a shot is (pre-) defined, and is one or multiple symbols, the length of the PSS, SSS and PBCH shot is independent with each other, i.e., length of the PSS, SSS and PBCH shot with in the same SyncBlock is either same or different.
- The method of claim 9, wherein the location of the first symbol of a shot in time domain within a SyncBlock is described by an offset value to the SyncBlock start symbol, (i.e., shot location reference point) , the location of all the PSS, SSS or PBCH shots in time domain within a SyncBlock is called the PSS, SSS or PBCH shot pattern, the location of the PSS, SSS and PBCH shots within the same SyncBlock is independent with each other, the location of the PSS shots, SSS shots and PBCH shots within the same SyncBlock will not overlap with each other.
- The method of claim 9, wherein the shot content of each PSS, SSS or PBCH shot within the same SyncBlock is the same or different.
- The method of claim 9, wherein the PSS/SSS/PBCH shot pattern within different SyncBlocks in the same SyncBlock periodicity is the same, at least one of the PSS shot (s) , SSS shot (s) and PBCH shot (s) occur within a SyncBlock.
- The method of claim 9, wherein the PSS shot (s) , SSS shot (s) and PBCH shot (s) occur within the same SyncBlock is transmitted by the same beam of the transmitter.
- The method of claim 1, wherein the method of PSS shot pattern design for detection performance enhancement.
- The method of claim 16, wherein the aim of the PSS shot pattern design is to let the gap between the PSS shot (s) within the SyncBlock (s) be different from each other.
- The method of claim 16, wherein the first symbol of each shot within the SyncBlock is represented as the non-zero element position of the sequence.
- The method of claim 16, wherein the sequence S should aim at obtain a C, and maximize the distance between the max value and the second max value of C: C (i) =S (m) *S (m+i) ′, i=-M+1, …M-1 , and/or the sequence S should aim at a C2, and maximize the distance between the max value and the second max value of C2: C2 (i) =Sq (m) *S (m) ′, q=-M+1, …M-1.
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| PCT/CN2024/083571 WO2025199680A1 (en) | 2024-03-25 | 2024-03-25 | Methods of synchronization block design |
| PCT/CN2025/081533 WO2025201010A1 (en) | 2024-03-25 | 2025-03-10 | Methods for enhanced synchronization block design in wireless communications |
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| PCT/CN2024/083571 WO2025199680A1 (en) | 2024-03-25 | 2024-03-25 | Methods of synchronization block design |
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| PCT/CN2025/081533 Pending WO2025201010A1 (en) | 2024-03-25 | 2025-03-10 | Methods for enhanced synchronization block design in wireless communications |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180302182A1 (en) * | 2017-04-14 | 2018-10-18 | Qualcomm Incorporated | Synchronization signal block designs for wireless communication |
| CN111194570A (en) * | 2017-10-06 | 2020-05-22 | 高通股份有限公司 | Techniques and Devices for Synchronized Design |
| WO2020142999A1 (en) * | 2019-01-10 | 2020-07-16 | Mediatek Singapore Pte. Ltd. | Nr v2x sidelink synchronization signal block |
| CN111885696A (en) * | 2020-07-07 | 2020-11-03 | 武汉虹信通信技术有限责任公司 | 5G NR clock frequency synchronization method and device |
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| US10356737B2 (en) * | 2015-04-27 | 2019-07-16 | Telefonaktiebolaget Lm Ericsson (Publ) | Cell search procedure frame format |
| US11399356B2 (en) * | 2018-06-26 | 2022-07-26 | Qualcomm Incorporated | Synchronization signal block (SSB)-based positioning measurement signals |
| CN116349172A (en) * | 2020-10-12 | 2023-06-27 | 联想（新加坡）私人有限公司 | Receive SSB structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180302182A1 (en) * | 2017-04-14 | 2018-10-18 | Qualcomm Incorporated | Synchronization signal block designs for wireless communication |
| CN111194570A (en) * | 2017-10-06 | 2020-05-22 | 高通股份有限公司 | Techniques and Devices for Synchronized Design |
| WO2020142999A1 (en) * | 2019-01-10 | 2020-07-16 | Mediatek Singapore Pte. Ltd. | Nr v2x sidelink synchronization signal block |
| CN111885696A (en) * | 2020-07-07 | 2020-11-03 | 武汉虹信通信技术有限责任公司 | 5G NR clock frequency synchronization method and device |
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