CN112566234A

CN112566234A - Synchronous broadcast signal configuration method, device, node and storage medium

Info

Publication number: CN112566234A
Application number: CN202011333998.9A
Authority: CN
Inventors: 徐汉青; 田力; 杨玲; 栗子阳; 赵亚军
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-03-26
Also published as: WO2022111432A1

Abstract

The application discloses a method, a device, a node and a storage medium for configuring a synchronous broadcast signal, wherein the method comprises the following steps: the user equipment receives a first SSB transmitted by the base station, wherein the pattern of the first SSB supports at least one of SCS above 120kHz, 240kHz and 240kHz, and the user equipment performs cell synchronization according to the first SSB. In this way, 120kHz and 240kHz SSB compatibility with higher SCS control channels or data channels can be achieved.

Description

Synchronous broadcast signal configuration method, device, node and storage medium

Technical Field

The present application relates to the field of wireless communication technologies, and in particular, to a method, an apparatus, a node, and a storage medium for configuring a synchronization broadcast signal.

Background

After a User Equipment (UE) is powered on, it needs to obtain a cell Identity (ID) and time-frequency synchronization through cell search. A New Radio (NR) of a fifth generation mobile communication technology (5th generation wireless systems, 5G) defines a New reference Signal as a Synchronization Signal physical broadcast channel block (SS/PBCH block, SSB), and the UE can perform cell search by detecting the SSB and perform Radio resource management measurement and Radio link management based on a Secondary Synchronization Signal (SSs) in the SSB.

For 5G NR Release-15/16FR2, SSB patterns Case D and Case E support 120kHz and 240kHz, respectively, since a Control Channel or a data Channel (e.g., a Physical Downlink Control Channel (PDCCH), a Physical Uplink Control Channel (PUCCH), a Physical Downlink Shared Channel (PDSCH), a Physical Uplink Shared Channel (PUSCH)) supports a Subcarrier Spacing (SCS) of 120kHz at maximum, and thus only SSB and the Control Channel or the data Channel of 120kHz or 60kHz are considered for the patterns Case D and Case E. However, if the control channel or data channel or signal supports a 240kHz, 480kHz or even higher SCS in the high frequency band (e.g., above 52.6GHz), the 120kHz and 240kHz SSB needs to consider compatibility issues with the higher SCS control channel or data channel. Also, at high frequency bands, even though the SSB SCS at 120kHz and 240kHz has very little performance difference from using a higher SSB SCS (such as 480/960kHz), some simulation results show that: some gain was still achieved with higher SSB SCS compared to the SSB SCS at 120/240 kHz. In order for a New Radio High Frequency (NR HF) to coexist friendly with Institute of Electrical and Electronics Engineers (IEEE) 802.11ad/ay, the NR HF has a High probability of supporting a carrier nominal bandwidth of 2.16 GHz. To support such a large bandwidth, the data channel and/or the control channel need to support SCS of 480kHz, 960kHz or higher, and thus SSB needs to use SCS matching with the data channel and/or the control channel, and then pattern design problem of SSB of 480kHz or 960kHz is faced.

Disclosure of Invention

The main purpose of the embodiments of the present application is to provide a method, an apparatus, a node and a storage medium for configuring a synchronous broadcast signal, which enable the compatibility of SSBs of 120kHz and 240kHz with higher SCS control channels or data channels.

In order to achieve the above object, an embodiment of the present application provides a method for configuring a synchronization broadcast signal, where the method includes:

the user equipment receives a first SSB sent by a base station;

the user equipment carries out cell synchronization according to the first SSB;

the pattern of the first SSB supports at least one of 120kHz, 240kHz, and SCS above 240 kHz.

To achieve the above object, an embodiment of the present invention provides a device for configuring a synchronized broadcast signal, including:

a receiving module, configured to receive a first SSB sent by a base station;

a synchronization module, configured to perform cell synchronization according to the first SSB;

In order to achieve the above object, an embodiment of the present invention provides a network node, where the node includes a memory, a processor, a program stored in the memory and executable on the processor, and a data bus for implementing connection communication between the processor and the memory, and the program, when executed by the processor, implements the synchronization broadcast signal configuration method provided in the embodiment of the present application.

To achieve the above object, an embodiment of the present invention provides a readable and writable storage medium for computer storage, where the storage medium stores one or more programs, and the one or more programs are executable by one or more processors to implement a method for configuring a synchronized broadcast signal provided in an embodiment of the present application.

The embodiment of the application provides a method, a device, a node and a storage medium for configuring a synchronous broadcast signal, wherein the method comprises the following steps: the user equipment receives a first SSB transmitted by the base station, wherein the pattern of the first SSB supports at least one of SCS above 120kHz, 240kHz and 240kHz, and the user equipment performs cell synchronization according to the first SSB. In this way, 120kHz and 240kHz SSB compatibility with higher SCS control channels or data channels can be achieved.

Drawings

FIG. 1 is a diagram of a prior art 5G NR SS/PBCH block pattern.

Fig. 2 is a schematic diagram of a transmission pattern of an SSB in the prior art.

Fig. 3 is a flowchart of a method for configuring a synchronization broadcast signal according to an embodiment of the present application.

Fig. 4 is a schematic diagram of pattern translation in the embodiment of the present application.

Fig. 5 is a schematic structural diagram of an apparatus for configuring a synchronization broadcast signal according to an embodiment of the present application.

Fig. 6 is a schematic structural diagram of a network node according to an embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

In addition, in the embodiments of the present application, the words "optionally" or "exemplarily" are used for indicating as examples, illustrations or explanations. Any embodiment or design described herein as "optionally" or "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the words "optionally" or "exemplarily" etc. is intended to present the relevant concepts in a concrete fashion.

In order to facilitate a clearer understanding of the solutions provided in the embodiments of the present application, the related concepts related to the embodiments of the present application are explained herein, specifically as follows:

the synchronization signal physical broadcast channel block includes a primary synchronization signal/secondary synchronization signal (PSS/SSS) and a Physical Broadcast Channel (PBCH).

As shown in FIG. 1, the 5G NR existing SS/PBCH block pattern includes 5 cases of Case A, Case B, Case C, Case D, Case E (refer to 3GPP TS 38.213Release-15/16), Case A is 15kHz, and Case B and Case C are 30 kHz. Case D was 120kHz and Case E was 240 kHz. Cases A, B, C are for carrier frequencies below 7GHz (FR1), and cases D and E are for carrier frequencies above 24GHz (FR 2). The main difference between Case B and Case C is that the patterns of 4 SSBs in each 1ms (2 slots) are different, and each SSB in the five cases occupies 4 Orthogonal Frequency Division Multiplexing (OFDM) symbols.

As shown in FIG. 2, the SSB transmission patterns are shown in the cases of FIG. 1 within the time granularity of 1ms (for Case A, Case B, Case C) and 0.25ms (for Case D, Case E).

On the basis of the above concept, the embodiment of the present application provides a flowchart of a method for configuring a synchronization broadcast signal, which may include, but is not limited to, the following steps as shown in fig. 3:

s301, the user equipment receives a first SSB sent by the base station.

Illustratively, the pattern of the first SSB transmitted by the base station may support at least one of SCS above 120kHz, 240kHz, and 240 kHz.

S302, the user equipment carries out cell synchronization according to the first SSB.

Since the pattern of the first SSB acquired by the user equipment can support at least one of the SCS of 120kHz, 240kHz, and above 240kHz, cell synchronization by the user equipment according to the first SSB can solve the problem of compatibility of the SSBs of 120kHz and 240kHz with higher SCS control channels or data channels.

The embodiment of the application provides a method for configuring a synchronization broadcast signal, which may include a user equipment receiving a first SSB sent by a base station, wherein a pattern of the first SSB supports at least one of SCS of 120kHz, 240kHz, and above 240kHz, and the user equipment performs cell synchronization according to the first SSB. In this way, 120kHz and 240kHz SSB compatibility with higher SCS control channels or data channels can be achieved.

In one example, the pattern of the first SSB includes the presence of multiple candidate SSBs within the window, the first symbol of the multiple candidate SSBs having a sequence number of {2, 8} +14 n; where n denotes a slot number, and every 8 consecutive slots are spaced by 2 slots, or every 16 consecutive slots are spaced by 4 slots.

For example, taking the SSB Case D1 at 120kHz as an example, the pattern of Case D1 can support coexistence of the 120kHz SSB with control channels of a SCS of 120kHz or higher (e.g., 240 kHz). The pattern of Case D1 is to contain two alternative SSBs in 1 slot (1 slot includes 14 symbols, the same below), each alternative SSB includes 4 symbols, and the starting symbols of the two alternative SSBs in the slot are {2, 8}, respectively. Case D1 leaves blank symbols at both the beginning and end of the half slot (7 symbols) that can send either PDCCH or PUCCH when SSB coexists with the same or higher SCS control channel. Assuming that there are 64 candidate SSBs in the window, the 64 candidate SSBs are located in 32 slots, and each 8 consecutive slots are separated by 2 slots, i.e., n has a value of 0, 1, 2, 3,4, 5, 6, 7, 10, 11, 12, 13, 14, 15, 16, 17, 20, 21, 22, 23, 24, 25, 26, 27, 30, 31, 32, 33, 34, 35, 36, 37.

Alternatively, assuming that the first SSB pattern includes an SSB Case E2 pattern, the SSB Case E2 pattern may support control channel coexistence of 240kHz with SCS 240kHz or higher (e.g., 480 kHz). The pattern of Case E2 is to contain two alternative SSBs in 1 time slot, each alternative SSB includes 4 symbols, and the starting symbols of the two alternative SSBs in the time slot are {2, 8}, respectively. Case E2 leaves blank symbols at both the beginning and end of the half slot (7 symbols) which can send PDCCH or PUCCH when SSB coexists with the same or higher SCS control channel. Assuming that there are 64 candidate SSBs in the window, the 64 candidate SSBs are located in 32 slots, and each 16 consecutive slots are separated by 4 slots, i.e., n has a value of 0, 1, 2, 3,4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35.

It should be noted that the window in the embodiment of the present application may be a transmission window, a reception window, or a measurement window, and the window is not limited to only having 64 alternative SSBs, and there may be more alternative SSBs. Further, the window length may be 5ms, 4ms, 3ms, 2ms, 1ms, 0.5ms, 0.25ms, 0.125ms, 62.5us, 31.25us, 15.625us, etc., which is not limited in the embodiments of the present application. For convenience of description, in the embodiment of the present application, it is assumed that the window length is half frame (5 ms).

In one example, the sequence number of the first symbol of the multiple candidate SSBs may also be {4, 8, 16, 20} +28n, where n denotes a slot pair sequence number, and each 8 consecutive slot pairs are separated by 4 slots. For example, a design may support a Case E1 pattern with coexistence of 240kHz SSB with control channels of SCS 240kHz or lower (e.g., 120 kHz). The Case E1 pattern may contain 4 alternative SSBs in 2 time slots, each alternative SSB including 4 symbols, and the starting symbols of the 4 alternative SSBs in the 2 time slots (i.e., 28 symbols) are {4, 8, 16, 20}, respectively. Case E1 leaves blank symbols at both the beginning and end of 2 slots, which can send PDCCH or PUCCH when SSB coexists with higher SCS control channel. Case E1 may also leave blank symbols at the beginning and end of each of the 2 slots, which may send PDCCH or PUCCH when SSB coexists with the same SCS control channel. Similarly, assuming that the Case E1 pattern is that there are 64 candidate SSBs in the window, the 64 candidate SSBs are located in 32 slots, i.e., 16 slot pairs, and if there are 4 slots between every 8 consecutive slot pairs, n takes on the

value

0, 1, 2, 3,4, 5, 6, 7, 10, 11, 12, 13, 14, 15, 16, 17.

In one scenario, for example, at high frequency bands (e.g., above 52.6GHz), even though the SSB SCS at 120/240kHz is very slightly different from using a higher SSB SCS (e.g., 480/960kHz), some simulation results show that: some gain can still be achieved with higher SSB SCS (e.g., 480/960kHz) than with the 120/240kHz SSB SCS. Also, the NR HF has a high probability of supporting a carrier nominal bandwidth of 2.16GHz, and in order for the NR HF to be able to coexist friendly with IEEE 802.11ad/ay, the data channel and/or the control channel needs to support SCS of 480kHz, 960kHz or more, and the SSB preferably uses SCS matched with the data channel and/or the control channel. Furthermore, the larger the SCS, the lower the frequency offset estimation complexity. Then, in this case, the pattern of the first SSB may be designed as follows, for example:

the pattern of the first SSB includes a plurality of candidate SSBs existing within the window, and a sequence number of a first symbol of the plurality of candidate SSBs is {4, 8, 16, 20} +28 n; where n denotes a slot pair number, and multiple candidate SSBs are located in consecutive slots, or every 4 consecutive slot pairs are separated by 2 slots, or every 8 consecutive slot pairs are separated by 4 slots.

Taking the SSB Case F1 at 480kHz as an example, this pattern can support the coexistence of 480kHz SSB with control channels of SCS 480kHz or lower SCS (e.g., 240 kHz). Case F1 contains 4 candidate SSBs in 2 slots, each candidate SSB includes 4 symbols, and the starting symbols of these 4 candidate SSBs in 2 slots (28 symbols) are {4, 8, 16, 20}, respectively. Case F1 leaves blank symbols at both the beginning and end of 2 slots, which can send PDCCH or PUCCH when SSB coexists with higher SCS control channel. Case F1 may also leave blank symbols at the beginning and end of each slot of 2 slots, which may send PDCCH or PUCCH when SSB coexists with the same SCS control channel. Assuming that 64 candidate SSBs exist in the window, the 64 candidate SSBs may be located in 32 consecutive timeslots, that is, 16 consecutive timeslot pairs, and at this time, n may take a value of 0, 1, 2, 3,4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15. Alternatively, the 64 alternative SSBs may be located in 32 slots, that is, 16 slot pairs, and each 4 consecutive slot pairs are separated by 2 slots, so that n may have a value of 0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18, or each 8 consecutive slot pairs are separated by 4 slots, and at this time, n has a value of 0, 1, 2, 3,4, 5, 6, 7, 10, 11, 12, 13, 14, 15, 16, 17.

Optionally, the first SSB may also be designed as SSB Case G1 at 960kHz, and this Case G1 pattern may be used to support coexistence of the 960kHz SSB with control channels of SCS 960kHz or lower (e.g., 480 kHz). Case G1 contains 4 candidate SSBs in 2 slots, each candidate SSB includes 4 symbols, and the starting symbols of the 4 candidate SSBs in the 2 slots (28 symbols) are {4, 8, 16, 20}, respectively. Case G1 leaves blank symbols at both the beginning and end of 2 slots, which can send PDCCH or PUCCH when SSB coexists with higher SCS control channel. Case G1 may also be left with blank symbols at the beginning and end of each slot of 2 slots, which may send PDCCH or PUCCH when SSB coexists with the same SCS control channel. Similarly, assuming that the Case G1 pattern is that there are 64 candidate SSBs in the window, the 64 candidate SSBs may be located in 32 consecutive time slots, i.e., 16 consecutive time slot pairs, and in this Case, n may take a value of 0, 1, 2, 3,4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15. Alternatively, the 64 alternative SSBs may be located in 32 slots, i.e., 16 slot pairs, and each 4 consecutive slot pairs are separated by 2 slots, so that n may have a value of 0, 1, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 18, or each 8 consecutive slot pairs are separated by 4 slots, and at this time, n has a value of 0, 1, 2, 3,4, 5, 6, 7, 10, 11, 12, 13, 14, 15, 16, 17.

In another case, the sequence number of the first symbol of the multiple candidate SSBs existing in the window may also be {2, 8} +14 n; where n denotes a slot number, and the multiple candidate SSBs are located in consecutive slots, or spaced by 2 slots between every 8 consecutive slots, or spaced by 4 slots between every 16 slots.

For example, for the example of SSB Case F2 at 480kHz, the Case F2 pattern can support the coexistence of control channels at 480kHz SSB and SCS at 480kHz or higher SCS (e.g., 960 kHz). Case F2 contains two alternative SSBs in 1 slot, each alternative SSB includes 4 symbols, and the starting symbols of the two alternative SSBs in the slot are {2, 8}, respectively. Case F2 leaves blank symbols at both the beginning and end of the half slot (7 symbols) that can send either PDCCH or PUCCH when SSB coexists with the same or higher SCS control channel. Assuming that there are 64 candidate SSBs in the window, the 64 candidate SSBs may be located in 32 consecutive slots, i.e., n has a value of 0, 1, 2, 3,4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31. Alternatively, the 64 candidates are located in 32 slots, and each 8 consecutive slots are separated by 2 slots, then n is 0, 1, 2, 3,4, 5, 6, 7, 10, 11, 12, 13, 14, 15, 16, 17, 20, 21, 22, 23, 24, 25, 26, 27, 30, 31, 32, 33, 34, 35, 36, 37. Alternatively, the 64 candidate SSBs are located in 32 slots, and each 16 slots are separated by 4 slots, that is, n has a value of 0, 1, 2, 3,4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35.

Optionally, the first SSB may also be designed as SSB Case G2 at 960kHz, and the Case G2 pattern may support coexistence of the 960kHz SSB with control channels of SCS 960kHz or higher (e.g., 1920 kHz). Case G2 contains two alternative SSBs in 1 slot, each alternative SSB includes 4 symbols, and the starting symbols of the two alternative SSBs in the slot are {2, 8}, respectively. Case G2 leaves blank symbols at both the beginning and end of the half slot (7 symbols) which can send PDCCH or PUCCH when SSB coexists with the same or higher SCS control channel. Assuming that there are 64 SSBs in the window, the 64 candidate SSBs may be located in 32 consecutive timeslots, i.e. n has a value of 0, 1, 2, 3,4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31. Alternatively, the 64 candidates are located in 32 slots, each 8 consecutive slots are separated by 2 slots, and correspondingly, n has a value of 0, 1, 2, 3,4, 5, 6, 7, 10, 11, 12, 13, 14, 15, 16, 17, 20, 21, 22, 23, 24, 25, 26, 27, 30, 31, 32, 33, 34, 35, 36, 37. Alternatively, the 64 candidate SSBs are located in 32 slots, and each 16 slots are separated by 4 slots, where n is equal to 0, 1, 2, 3,4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35.

In another scenario, in conventional FR2, Case D and Case E do not have a time interval of at least one symbol or more between each SSB, and many SSBs in Case D and Case E are continuously transmitted. Since the length of the Normal Cyclic Prefix (Normal CP) corresponding to the 240kHz SCS is 293ns (the CP corresponding to the 120kHz SCS is longer), in most scenarios, this length is greater than the sum of the lengths of the delay spread, the beam (beam) switching time, and the like. Thus, beam switching can be performed in the CP, i.e., if the SSBs maintain the current SCS (120/240kHz) unchanged, there is no need to leave an explicit beam switching gap (beam switching gap) between the SSBs. However, if the SSB employs SCS of 480kHz, 960kHz or higher, at this time the normal CP length is only 146ns, 73ns or even lower, the CP can only meet the requirement of delay spread, and the beam switching operation cannot be performed therein. In this case, there is a need to leave a beam handover time between SSBs during which the user equipment does not receive any data. Furthermore, if there is no time interval between two SSBs, if the first SSB is successfully transmitted, then Listen Before Talk (LBT) cannot be performed Before the second SSB.

Based on the problems in the above scenario, the pattern of the first SSB may include a pattern of at least one of Case a, Case C, Case D1, Case E2, Case f2, and Case G2 in one time slot or two time slots, and at least 2 or more symbol intervals may be reserved between every two SSBs in Case a, Case C, Case D1, Case E2, Case f2, and Case G2.

Alternatively, the existing Case D pattern may be translated, and the translated pattern may be used as the first SSB pattern. Illustratively, the translating may include translating forward a previous SSB of two consecutive SSBs within the same time slot in the Case D class, and/or translating backward a next SSB.

For example, a preceding SSB in an even number of slots (e.g.,

slots

0, 2, 4, … …) in the Case D pattern is shifted forward by at least one symbol and/or a following SSB in an odd number of slots (e.g.,

slots

1, 3, 5, … …) is shifted backward by at least one symbol.

As shown in fig. 4, with reference to (a) in fig. 4, if the previous SSB in the even number of slots (slot 0) in Case D is shifted forward by one symbol and the next SSB in the odd number of slots (slot 1) is shifted backward by one symbol, the new SSB pattern contains 4 alternative SSBs in 2 slots, each of which comprises 4 symbols, and the starting symbols of the 4 alternative SSBs in the 2 slots (28 symbols) are {3, 8, 16, 21}, respectively, as shown in the first pattern in (b) in fig. 4. If the previous SSB in the even number of slots (slot 0) of Case D is shifted forward by two symbols and the next SSB in the odd number of slots (slot 1) is shifted backward by two symbols, the starting symbols of the shifted 4 alternative SSBs in these 2 slots are {2, 8, 16, 22} respectively, as shown in the second pattern in (b) of fig. 4.

In the prior art, there are 2 alternative SSBs per slot, for example, 64 SSBs in a Case D pattern at 120kHz almost fill half a half-half a half frame window, and 64 SSBs in a Case E pattern at 240kHz are nearly full. However, since the slot length is shortened due to the increase of SCS, there is enough space in the half frame to accommodate the transmission of 64 SSBs, so only one alternative SSB may be defined in one slot, or only one SSB may be defined in one slot to transmit on one beam, or it is assumed that the ue receives at most one SSB on one beam in one slot, that is, the SSB index, Quasi Co-location (QCL) index, and the beam index are the same, so that it can be ensured that there is enough time for beam handover. And, only one alternative SSB is defined in one slot, which is also beneficial for coexistence with lower order, same order, or higher order SCS PDCCH.

Illustratively, the first SSB pattern may be located in the middle or approximately in the middle of the slot. For example, the alternative SSB start symbol is located in any one of symbol 0 to symbol 8 in the slot. In order to ensure coverage and detection performance of the SSBs, each candidate SSB may occupy 4 symbols or more (i.e., each candidate SSB occupies 4 or more symbols and 14 or less). For example, PSS in one SSB occupies 2 symbols or 4 symbols, and/or SSS in one SSB occupies 2 symbols or 4 symbols, and/or PBCH in one SSB occupies at least 3 symbols (e.g., occupies 3 symbols, 4 symbols, or more).

Further, the plurality of candidate SSBs within the window may be divided into a plurality of groups, with each group being separated by at least one symbol, or at least one slot. For example, it is assumed that X candidate SSBs coexist in a window, and the X candidate SSBs are divided into X groups, that is, each group includes one candidate SSB, and the X candidate SSBs are distributed over X consecutive timeslots, or two timeslots consecutively carrying the candidate SSBs are separated by one timeslot or multiple timeslots. Alternatively, assuming that X candidate SSBs coexist in the window, the X candidate SSBs may be divided into Y groups, and two consecutive groups are separated by one time slot or multiple time slots.

Optionally, the pattern of the first SSB may also be defined to include at least two candidate SSBs in one slot, but a plurality of consecutive candidate SSBs are defined to have the same first index, and the first index includes at least one of an SSB index, a QCL index, and a beam index. For example, consecutive 2 (such as odd and even) or 4 candidate SSBs have the same SSB index, QCL index, beam index; or all the alternative SSBs in the same slot or two slots have the same SSB index, QCL index, beam index. For example, the first candidate SSB and the second candidate SSB have the same SSB index, QCL index, and beam index, the third candidate SSB and the fourth candidate SSB have the same SSB index, QCL index, and beam index, and so on.

It should be noted that, in the embodiment of the present application, the SSB index, the QCL index, and the beam index that are the same indicate that one or more of the SSB index, the QCL index, and the beam index are the same.

Optionally, in an example, the base station may transmit one of two alternative SSBs in the same time slot to the user equipment, or the base station may transmit the SSBs to the user equipment only on the same beam in one time slot.

Alternatively, the candidate SSB indexes (candidate SSB indexes) in the two candidate SSBs in the same slot may be different but have the same SSB index, or QCL index, or beam index. The base station may transmit the SSB on only one beam in one slot, where the same beam may be defined by the same SSB index, QCL index, and beam index, i.e., the base station may not transmit the SSB on multiple beams in one slot. For example, if the base station successfully transmits the SSB on beam 0 on symbols 4-7, then no SSB may be transmitted on symbols 8-11 of the same slot, and if transmission is required, then the SSB may continue on beam 0. Alternatively, on symbols 4-7, due to LBT failure, i.e., failure to transmit SSB on beam 0, SSB may continue to be transmitted on beam 0 based on symbols 8-11.

Accordingly, the step S301 may be that the ue receives at most one SSB in one timeslot, or the ue does not receive two SSBs with the same SSB index, QCL index, and beam index in one timeslot. That is, the ue assumes that it receives at most one SSB in one slot, or the ue does not assume that it receives two SSBs with the same SSB index, QCL index, and beam index in one slot.

Based on such a design, not only the time problem of beam switching but also the problem that there is no time interval between two consecutive SSBs to perform LBT (for example, patterns of Case B, Case D, Case E1, Case F1, Case G1) can be solved, and at the same time, this design can also be applied to the Case where two SSBs are not continuous within one time slot in patterns of Case a, Case C, Case D1, Case E2, Case F2, and Case G2.

In one example, in a scenario of a carrier with FR2 frequency (24.25GHz-52.6GHz) and a carrier with frequency above FR2 (e.g., 52.6GHz-71GHz), 64 beams are generally supported for transmission, and accordingly, 64 candidate SSBs defined in a window can meet the requirement. However, to increase the chance of SSBs being transmitted within a window, especially for unlicensed scenarios, more alternative SSBs may be defined within the window.

For example, for SSB with 240kHz SCS, 128 alternative SSBs can be defined in the half frame window, and the number of the alternative SSBs is 0-127 respectively.

For SSB of 480kHz SCS, 256 alternative SSBs can be defined in a half frame window, and the number of the alternative SSBs is 0-255 respectively.

For SSB with 960kHz SCS, 512 alternative SSBs can be defined in a half frame window, and the number of the alternative SSBs is 0-511 respectively.

Alternatively, for an SSB of 240/480/960kHz SCS, 64 or more alternative SSBs (e.g., X) are defined within a smaller window (e.g., 1ms, 0.5ms, etc.) than the half frame window, each numbered 0- (X-1).

Similarly, the window length may be 5ms, 4ms, 3ms, 2ms, 1ms, 0.5ms, 0.25ms, 0.125ms, 62.5us, 31.25us, 15.625us, etc., and is assumed to be half frame (5ms) for convenience of description.

In one example, the first index may be calculated according to a first algorithm. For example, the first algorithm may include dividing the second index by X and rounding down to obtain a calculation result, and performing a modulo calculation based on the calculation result and Q. Wherein the second index includes a candidate SSB index (candidate SSB index) or a demodulation reference signal sequence index (DMRS index), X denotes the number of consecutive SSBs having the same first index, and Q denotes the number of beams or the number of quasi-co-site relations (e.g., defined in 3GPP TS 38.213 v16.3.0)

And may also be defined as the number of quasi co-site relationships of the SSB).

It should be noted that the above-mentioned candidate SSB index is not equivalent to an SSB index (SSB index), the candidate SSB index is carried in an SSB sent by the base station, and the user equipment may calculate the SSB index according to the candidate SSB index demodulated from the SSB. However, the SSB index may be equivalent to a quasi co-site index (QCL index) and a Beam index (Beam index) to some extent.

For example, if 2 consecutive candidate SSBs in the same slot or two slots have the same first index, the first index may be calculated as follows:

taking the SSB index as an example,

alternatively, assuming that the consecutive 4 candidate SSBs have the same first index, for example, candate SSB 0, candate SSB1, candate SSB 2, and candate SSB 3 have the same QCL relationship, the SSB index is calculated as follows:

it should be noted that QCL refers to a large scale parameter of a channel experienced by a symbol on one antenna port that can be inferred from a channel experienced by a symbol on another antenna port. The large-scale parameters may include one or more of delay spread, average delay, doppler spread, doppler shift, average gain, and spatial reception parameters, among others. SSBs having the same SSB index or QCL index or Beam index are QCL-specific, e.g., in terms of average gain, QCL-type A, and QCL-type D.

In an example, the implementation manner of step S301 may include that the user equipment acquires the candidate SSB index according to the first SSB sent by the base station.

Illustratively, the above-mentioned alternative SSB index may be carried on the DMRS sequence. The formula for initializing the DMRS sequence scrambling is as follows:

wherein the content of the first and second substances,

the minimum 4 bits (bit), 5 bits or 6 bits of the candidate SSB index are represented, i.e., the 4 bits or 5 bits need to be carried by 16 or 32 DMRS sequences.

Optionally, the candidate SSB index may also be carried in a PBCH payload (non-Master Information Block, MIB)), and since 1bit of 8 bits of the PBCH payload is currently used to send the low-frequency candidate SSB index, no spare bit is available for the high-frequency scene. Therefore, the number of bits for sending the candidate SSB index is redefined in the PBCH payload for carrying the candidate SSB index, for example, 1bit or 2 bits are additionally defined for sending the candidate SSB index.

For example, assume that the number of SSB indexes indicated is equal to 64 in PBCH payload

All used, then the alternative SSB index may be sent with a new definition of 1bit or 2bit or 3bit in the PBCH payload, e.g., the new definition

And/or

It should be noted that, the increase of the number of bits of the PBCH payload does not affect the process of scrambling and Cyclic Redundancy Check (CRC), and 1bit, 2bit or 3bit is correspondingly added after scrambling and CRC Check. The 512bit output of the Polar code (Polar) code is unchanged. Therefore, the subsequent process of Polar coding and even the resource element mapping process are not affected.

In one example, the alternative SSB index may also be carried in the MIB, and the alternative SSB index is sent via the defined or undefined information bit in the MIB, for example, via subcarrierspacechingmon, SSB-subcarriersoffset, or pdcch-ConfigSIB1, or spare in the MIB. These information bits may be idle in the 5G high frequency or unlicensed carrier scenario and thus may be used to send alternative SSB indices. Alternatively, the alternative SSB index may be carried in a System message Block (SIB), for example, the alternative SSB index is transmitted through SIB1 or OSI (i.e., other Information bits, such as SIB2, SIB3, etc.).

Fig. 5 is a device for configuring a synchronized broadcast signal according to an embodiment of the present application, and as shown in fig. 5, the device may include: a receiving module 501 and a synchronization module 502;

the receiving module is used for receiving a first SSB sent by a base station;

wherein the first SSB pattern supports at least one of 120kHz, 240kHz, and SCS above 240 kHz.

In an example, the pattern of the first SSB includes that a plurality of candidate SSBs exist in a window, and a sequence number of a first symbol of the plurality of candidate SSBs is {2, 8} +14 n; where n denotes a slot number, and every 8 consecutive slots are spaced by 2 slots, or every 16 consecutive slots are spaced by 4 slots.

Or, the pattern of the first SSB includes that a plurality of candidate SSBs exist in the window, and the sequence number of the first symbol of the plurality of candidate SSBs is {4, 8, 16, 20} +28 n; where n represents the slot pair number, with 4 slots between every 8 consecutive slot pairs.

In one example, the pattern of the first SSB may include the presence of multiple candidate SSBs within the window, the first symbol of the multiple candidate SSBs having a sequence number of {4, 8, 16, 20} +28 n; where n denotes a slot pair number, and multiple candidate SSBs are located in consecutive slots, or every 4 consecutive slot pairs are separated by 2 slots, or every 8 consecutive slot pairs are separated by 4 slots.

Or, the pattern of the first SSB includes that multiple candidate SSBs exist in the window, and the sequence number of the first symbol of the multiple candidate SSBs is {2, 8} +14 n; where n denotes a slot number, and multiple candidate SSBs are located in consecutive slots, or spaced every 2 slots between every 8 consecutive slots, or spaced every 4 slots between every 16 slots.

In one example, the pattern of the first SSB may include a pattern translated from a pattern of the Case D class, the translation including translating a previous SSB of two consecutive SSBs within the same time slot of the Case D class forward and/or translating a next SSB backward.

Optionally, the pattern of the first SSB may include that one candidate SSB exists in one slot, the one candidate SSB occupies at least 4 symbols, and a starting symbol of the one candidate SSB is located in any one of symbol 0 to symbol 8 in the one slot.

Further, the plurality of candidate SSBs within the window may be divided into a plurality of groups, each group being separated by at least one symbol, or each group being separated by at least one slot.

In one example, the pattern of the first SSB includes at least two candidate SSBs existing in one slot, and consecutive candidate SSBs have the same first index, and the first index includes at least one of an SSB index, a quasi-co-site index, and a beam index.

Illustratively, the first index may be calculated according to a first algorithm, which may include, for example: and dividing the second index by X, rounding down to obtain a calculation result, and performing modular calculation according to the calculation result and Q.

Wherein, the second index includes an alternative SSB index or a DMRS index, X denotes the number of consecutive SSBs having the same first index, and Q denotes the number of beams or the number of quasi-co-site relations.

Optionally, the receiving module may be further configured to obtain an alternative SSB index according to the first SSB sent by the base station.

Exemplarily, the above alternative SSB index may be carried on the DMRS sequence;

or, the candidate SSB index is carried in a PBCH payload, where the number of bits for sending the candidate SSB index is redefined;

alternatively, the alternate SSB index is carried in the master information block;

alternatively, the alternate SSB index is carried in a system message block.

The apparatus for configuring a synchronization broadcast signal provided in this embodiment is used to implement the method for configuring a synchronization broadcast signal according to the embodiment shown in fig. 3, and the implementation principle and the technical effect are similar, which are not described herein again.

Fig. 6 is a schematic structural diagram of a network node according to an embodiment, as shown in fig. 6, the network node includes a processor 601 and a memory 602; the number of processors 601 in the node may be one or more, and one processor 601 is taken as an example in fig. 6; the processor 601 and the memory 602 in the node may be connected by a bus or other means, and the connection by the bus is taken as an example in fig. 6.

The memory 602 is used as a computer-readable storage medium for storing software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the synchronization broadcast signal configuration method in the embodiment of fig. 3 (for example, the receiving module 501 and the synchronization module 502 in the synchronization broadcast signal configuration apparatus). The processor 601 implements the above-described synchronized broadcast signal configuration method by running software programs, instructions, and modules stored in the memory 602.

The memory 602 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function; the storage data area may store data created according to use of the set-top box, and the like. Further, the memory 602 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device.

The present application further provides a readable and writable storage medium for computer storage, where one or more programs are stored, and the one or more programs are executable by one or more processors to perform a method for configuring a synchronized broadcast signal in the foregoing embodiments.

It will be understood by those of ordinary skill in the art that all or some of the steps of the methods disclosed above, functional modules/units in the devices, may be implemented as software, firmware, hardware, and suitable combinations thereof.

In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.

The foregoing description of the exemplary embodiments of the present application with reference to the accompanying drawings is merely illustrative and not intended to limit the scope of the application. Any modifications, equivalents and improvements which may occur to those skilled in the art without departing from the scope and spirit of the present application are intended to be within the scope of the claims of the present application.

Claims

1. A method for configuring a synchronized broadcast signal, comprising:

the user equipment receives a first synchronous signal physical broadcast channel block SSB sent by a base station;

the user equipment carries out cell synchronization according to the first SSB;

the pattern of the first SSB supports at least one of subcarrier spacing of 120kHz, 240kHz, and above 240 kHz.

2. The method of claim 1, wherein the pattern of the first SSB comprises a plurality of candidate SSBs existing within a window, and wherein a first symbol of the plurality of candidate SSBs has a sequence number of {2, 8} +14 n;

where n denotes a slot number, and every 8 consecutive slots are spaced by 2 slots, or every 16 consecutive slots are spaced by 4 slots.

3. The method of claim 1, wherein the pattern of the first SSB comprises a plurality of candidate SSBs existing within a window, and wherein a first symbol of the plurality of candidate SSBs has a sequence number of {4, 8, 16, 20} +28 n;

where n represents the slot pair number, with 4 slots between every 8 consecutive slot pairs.

4. The method of claim 1, wherein the pattern of the first SSB comprises a plurality of candidate SSBs existing within a window, and wherein a first symbol of the plurality of candidate SSBs has a sequence number of {4, 8, 16, 20} +28 n;

wherein n represents a slot pair number, and the plurality of candidate SSBs are located in consecutive slots, or spaced by 2 slots between every 4 consecutive slot pairs, or spaced by 4 slots between every 8 consecutive slot pairs.

5. The method of claim 1, wherein the pattern of the first SSB comprises a plurality of candidate SSBs existing within a window, and wherein a first symbol of the plurality of candidate SSBs has a sequence number of {2, 8} +14 n;

wherein n represents a slot number, and the plurality of candidate SSBs are located in consecutive slots, or spaced by 2 slots between every 8 consecutive slots, or spaced by 4 slots between every 16 slots.

6. The method of claim 1, wherein the pattern of the first SSB comprises a translated pattern of a Case D-like pattern;

the translation comprises forward translation of a former SSB and/or backward translation of a latter SSB in two consecutive SSBs in the same time slot in the Case D class.

7. The method of claim 1, wherein the pattern of the first SSB comprises one candidate SSB existing in one slot, wherein the one candidate SSB occupies at least 4 symbols, and a starting symbol of the one candidate SSB is located in any one of symbol 0 to symbol 8 in the one slot.

8. The method of claim 7, wherein the plurality of candidate SSBs in a window are grouped into a plurality of groups, each group separated by at least one symbol, or each group separated by at least one slot.

9. The method of claim 1, wherein the pattern of the first SSB comprises at least two candidate SSBs in a slot, and wherein consecutive candidate SSBs have a same first index, and wherein the first index comprises at least one of an SSB index, a quasi co-site index, and a beam index.

10. The method of claim 9, wherein the first index is calculated according to a first algorithm comprising: dividing the second index by X, rounding down to obtain a calculation result, and performing modular calculation according to the calculation result and Q;

wherein the second index comprises an alternative SSB index or a demodulation reference signal sequence index, X represents the number of consecutive SSBs with the same first index, and Q represents the number of beams or the number of quasi-co-site relations.

11. The method of claim 1, wherein the receiving, by the ue, the first SSB transmitted by the base station comprises:

and the user equipment acquires the alternative SSB index according to the first SSB sent by the base station.

12. The method of claim 11, wherein the alternative SSB index is carried on a demodulation reference signal sequence;

or, the candidate SSB index is carried in a physical broadcast channel payload, and the physical broadcast channel payload redefines the number of bits for transmitting the candidate SSB index.

13. The method of claim 11, wherein the alternate SSB index is carried in a master information block;

alternatively, the alternative SSB index is carried in a system message block.

14. A synchronized broadcast signal configuration apparatus, comprising:

a receiving module, configured to receive a first synchronization signal physical broadcast channel block SSB sent by a base station;

15. A network node, comprising: memory, a processor, a program stored on the memory and executable on the processor, and a data bus for enabling connection communication between the processor and the memory, the program, when executed by the processor, implementing the synchronized broadcast signal configuration method of any one of claims 1-13.

16. A readable and writable storage medium for computer storage, the storage medium storing one or more programs, the one or more programs being executable by one or more processors to implement the synchronized broadcast signal configuration method of any one of claims 1-13.