CN108809497B

CN108809497B - Bearing method of time index, detection method and device, storage medium, base station and terminal

Info

Publication number: CN108809497B
Application number: CN201710313774.3A
Authority: CN
Inventors: 周化雨; 赵东鹤; 贾亚男
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2017-05-05
Filing date: 2017-05-05
Publication date: 2021-11-02
Anticipated expiration: 2037-05-05
Also published as: CN108809497A

Abstract

A bearing method, a detection method and a device, a storage medium, a base station and a terminal of time index are provided, wherein the bearing method comprises the following steps: coding information bits carried on a truly transmitted PBCH block, wherein the information bits comprise a first time index, and the first time index comprises at least part of information in system frame number information; scrambling the encoded information bits based on a really transmitted scrambling code subsequence selected from a set of pre-set scrambling code subsequences. The technical scheme provided by the invention can ensure that PBCH designed by the base station in the 5G system can support one-time detection and multiple detections.

Description

Bearing method of time index, detection method and device, storage medium, base station and terminal

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a time index bearing method, a time index detection method and apparatus, a storage medium, a base station, and a terminal.

Background

In the fifth Generation mobile communication technology (5th-Generation, abbreviated as 5G) system, a Physical Broadcast Channel (PBCH) is included in a synchronization signal block for transmission. The physical broadcast channel may be used to carry part of Minimum System Information (MSI), and may also be used to carry SS-block index (SS-block index) Information of a synchronization signal block and part or all of System Frame Number (SFN) Information. The index information and the system frame number information of the synchronization signal block may be collectively referred to as a time index indication (also referred to as a time index). Further, the physical broadcast channel may have other names in the 5G system, such as NR-PBCH, etc.

However, the existing protocol does not specify the specific bearer manner of the time index in the PBCH in the 5G system, and accordingly, the ue side cannot accurately and quickly obtain the required time index based on PBCH detection.

Disclosure of Invention

The technical problem solved by the invention is how to design PBCH in 5G system to ensure that the PBCH can support one detection and multiple detections.

To solve the foregoing technical problem, an embodiment of the present invention provides a method for bearing a time index, including: coding information bits carried on a truly transmitted PBCH block, wherein the information bits comprise a first time index, and the first time index comprises at least part of information in system frame number information; scrambling the encoded information bits based on a really transmitted scrambling code subsequence selected from a set of pre-set scrambling code subsequences.

An embodiment of the present invention further provides a time index bearing apparatus, including: an encoding module, configured to encode information bits carried on a actually sent PBCH block, where the information bits include a first time index, and the first time index includes at least a part of information in system frame number information; and the scrambling module is used for scrambling the coded information bits based on the really transmitted scrambling code subsequence, wherein the really transmitted scrambling code subsequence is selected from a preset scrambling code subsequence set.

The embodiment of the invention also provides a detection method of the time index, which comprises the following steps: sequentially selecting at least one preset scrambling code subsequence from a preset scrambling code subsequence set according to at least one detected PBCH block, wherein the at least one detected PBCH block carries information bits, the information bits comprise a first time index, and the first time index comprises at least part of information in system frame number information; for each of the at least one preset scrambling code subsequence, descrambling the detected at least one PBCH block based on the preset scrambling code subsequence; combining and decoding the descrambled at least one PBCH block; and when the decoding is successful, for each preset scrambling code subsequence, acquiring an index of a really transmitted scrambling code subsequence corresponding to the at least one PBCH block based on the preset scrambling code subsequence, wherein the index of the really transmitted scrambling code subsequence comprises the index of the really transmitted synchronization signal block and the rest information bits except the at least part of information in the system frame number information.

An embodiment of the present invention further provides a device for detecting a time index, including: a selecting module, configured to sequentially select at least one preset scrambling code subsequence from a preset scrambling code subsequence set according to at least one detected PBCH block, where the at least one detected PBCH block carries information bits, where the information bits include a first time index, and the first time index includes at least a part of information in system frame number information; a descrambling module configured to descramble the detected at least one PBCH block based on each of the at least one predetermined scrambling code subsequence; a merging decoding module, configured to merge and decode at least one PBCH block after descrambling; and a first obtaining module, configured to, for each preset scrambling subsequence, obtain, based on the preset scrambling subsequence, an index of a truly transmitted scrambling subsequence corresponding to the at least one PBCH block, where the index of the truly transmitted scrambling subsequence includes an index of a truly transmitted synchronization signal block and remaining information bits in the system frame number information except for the at least part of information.

The embodiment of the invention also provides a storage medium, wherein computer instructions are stored on the storage medium, and the computer instructions execute the steps of the method when running.

The embodiment of the present invention further provides a base station, which includes a memory and a processor, where the memory stores computer instructions capable of being executed on the processor, and the processor executes the steps of the method when executing the computer instructions.

The embodiment of the present invention further provides a terminal, which includes a memory and a processor, where the memory stores computer instructions capable of running on the processor, and the processor executes the steps of the method when executing the computer instructions.

Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:

a base station side encodes information bits carried on a PBCH block which is really sent, wherein the information bits comprise a first time index, and the first time index comprises at least part of information in system frame number information; scrambling the encoded information bits based on a really transmitted scrambling code subsequence selected from a set of pre-set scrambling code subsequences. Compared with the scheme of scrambling the carried information bits based on the unique scrambling code sequence in the prior art, the technical scheme of the embodiment of the invention selects the proper actually-transmitted scrambling code subsequence from the actually-transmitted scrambling code subsequence set to scramble the coded information bits so as to specifically encode and scramble the currently actually-transmitted PBCH block, so that the PBCH designed by the technical scheme of the embodiment of the invention can be more suitable for the idea of transmitting information based on the synchronous signal block in a 5G system.

Further, the user equipment side sequentially selects at least one preset scrambling subsequence from a preset scrambling subsequence set according to the detected at least one PBCH block, wherein the detected at least one PBCH block carries information bits, the information bits comprise a first time index, and the first time index comprises at least part of information in system frame number information; for each of the at least one preset scrambling code subsequence, descrambling the detected at least one PBCH block based on the preset scrambling code subsequence; combining and decoding the descrambled at least one PBCH block; and when the decoding is successful, for each preset scrambling code subsequence, acquiring an index of a really transmitted scrambling code subsequence corresponding to the at least one PBCH block based on the preset scrambling code subsequence, wherein the index of the really transmitted scrambling code subsequence comprises the index of the really transmitted synchronization signal block and the rest information bits except the at least part of information in the system frame number information. Those skilled in the art understand that, for a user equipment that needs to perform detection once, the technical solution of the embodiment of the present invention can acquire a required time index (for example, the index of the synchronization signal block) based on one PBCH block, and for a user equipment that needs to perform detection multiple times, the technical solution of the embodiment of the present invention can also acquire the time index (for example, information included in the first time index and the index of the actually transmitted scrambling code subsequence) based on multiple PBCH blocks. Therefore, the PBCH designed by the technical scheme of the embodiment of the invention can simultaneously meet the diversified detection requirements of the user equipment under a 5G system.

Drawings

Fig. 1 is a flowchart of a time-indexed bearer method according to a first embodiment of the present invention;

fig. 2 is a schematic diagram of a configuration of a synchronization signal block in a time slot according to a first embodiment of the present invention;

fig. 3 is a schematic diagram of another arrangement of synchronization signal blocks in time slots according to the first embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a time-indexed carrier according to a second embodiment of the present invention;

FIG. 5 is a flowchart of a method for detecting a time index according to a third embodiment of the present invention;

fig. 6 is a schematic structural diagram of a time index detection apparatus according to a fourth embodiment of the present invention.

Detailed Description

In the fifth Generation mobile communication technology (5th-Generation, abbreviated as 5G) system, a Physical Broadcast Channel (PBCH) is included in a synchronization signal block for transmission. The PBCH may be used to carry Minimum System Information (MSI) of a part, and may also be used to carry index (SS-block index) Information of a synchronization signal block.

Based on the existing protocol, the time domain position of the possible synchronization signal block in a period is fixed, so that when a User Equipment (UE) detects the index information of the synchronization signal block, the timing information in the period can be derived (for example, the timing information may include the number of slots where the synchronization signal block starts in the period and the number of symbols in the slot).

For example, when the period is 10ms, the time domain position of the possible sync signal block within 10ms is fixed, and when the ue detects the index information of the sync signal block, the timing information within 10ms (including the number of slots where the sync signal block starts within 10ms and the number of symbols within the slot) can be derived.

The PBCH may also be used to carry System Frame Number (SFN) information. For example, based on the existing protocol, the system frame number has 1024 values, wherein each system frame takes 10 milliseconds (i.e., 10 information bits). Based on the PBCH bearer SFN, an implicit plus explicit manner may be adopted, for example, in Long-Term Evolution (Long-Term Evolution, LTE for short), the PBCH may be divided into 4 PBCH blocks (chunk) within one transmission time interval (e.g., 40ms) and sent, each PBCH block is sent within a certain subframe within 10ms, when a user equipment blindly detects the 4 PBCH blocks, the lowest two information bits of the SFN may be determined, and the remaining 8 information bits of the SFN are carried in a load (payload) or information bits of the PBCH. In a 5G system, the PBCH block may be a PBCH time-frequency resource within one synchronization signal block.

In summary, the PBCH may be used to carry the index of the synchronization signal block and the information of SFN (possibly part). In general, the index of the sync signal block and the indication of the SFN may be collectively referred to as a time index indication (time index indication), because the SFN may also be regarded as an index of a system frame, which is also time-dependent. Therefore, the PBCH may be used to carry a time index or indicate a time index.

Generally, the PBCH is required to support combining gain (combining gain). In LTE, PBCH is transmitted in 4 PBCH blocks within 40ms, each PBCH block being transmitted within a certain subframe within 10ms, which 4 PBCH blocks may be combined to improve the signal-to-noise ratio of the signal. In the 5G system, the Transmission Time Interval (TTI) of the PBCH is 80ms, and all PBCH blocks in the transmitted synchronization signal blocks can be combined within the 80 ms.

On the other hand, in cell handover, the user equipment needs to quickly obtain partial timing information of the target cell, such as an index of a synchronization signal block within 10ms, so that the user equipment knows at what time to initiate Random Access (RA).

It should be noted that the ue does not necessarily need to obtain all timing information, because in some scenarios the ue can know at what time to initiate random access without obtaining the SFN of the target cell. Therefore, for the situation that the user equipment needs to obtain the partial timing information of the target cell quickly, the user equipment needs to be able to solve the partial timing information of the target cell through one PBCH block of the target cell, such a PBCH detection manner is called one-shot detection (one-shot detection), and a detection manner combining multiple PBCH blocks is called multiple-shot detection (multi-shot detection).

However, the prior art does not provide a suitable scheme for enabling the PBCH in the 5G system to support both one detection and multiple detections.

In order to solve the technical problem, a base station side encodes information bits carried on a truly transmitted PBCH block, wherein the information bits comprise a first time index, and the first time index comprises at least part of information in system frame number information; scrambling the encoded information bits based on a really transmitted scrambling code subsequence selected from a set of pre-set scrambling code subsequences. Those skilled in the art understand that, in the technical solution of the embodiment of the present invention, a suitable actually transmitted scrambling code subsequence is selected from the actually transmitted scrambling code subsequence set to scramble the encoded information bits, so as to encode and scramble the currently actually transmitted PBCH block in a targeted manner, so that the PBCH designed by the technical solution of the embodiment of the present invention can be more suitable for the concept of transmitting information based on the synchronization signal block in the 5G system.

Further, the user equipment side sequentially selects at least one preset scrambling code subsequence from a preset scrambling code subsequence set according to at least one detected PBCH block, wherein the at least one detected PBCH block carries information bits, the information bits comprise a first time index, and the first time index comprises at least one part of information in system frame number information; for each of the at least one preset scrambling code subsequence, descrambling the detected at least one PBCH block based on the preset scrambling code subsequence; combining and decoding the descrambled at least one PBCH block; and when the decoding is successful, for each preset scrambling code subsequence, acquiring an index of a really transmitted scrambling code subsequence corresponding to the at least one PBCH block based on the preset scrambling code subsequence, wherein the index of the really transmitted scrambling code subsequence comprises the index of the really transmitted synchronization signal block and the rest information bits except the at least part of information in the system frame number information.

Those skilled in the art understand that, for a user equipment that needs to perform detection once, the technical solution of the embodiment of the present invention can acquire a required time index (for example, the index of the synchronization signal block) based on one PBCH block, and for a user equipment that needs to perform detection multiple times, the technical solution of the embodiment of the present invention can also acquire the time index (for example, information included in the first time index and the index of the actually transmitted scrambling code subsequence) based on multiple PBCH blocks. Therefore, the PBCH designed by the technical scheme of the embodiment of the invention can simultaneously meet the diversified detection requirements of the user equipment under a 5G system.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Fig. 1 is a flowchart of a time-indexed bearer method according to a first embodiment of the present invention.

Specifically, in this embodiment, the method for carrying a time index may be implemented according to the following steps:

s101, encoding information bits carried on a PBCH block that is actually sent, where the information bits include a first time index, and the first time index includes at least a part of information in system frame number information (hereinafter referred to as SFN).

S102, scrambling the coded information bits based on the really transmitted scrambling code subsequence selected from a preset scrambling code subsequence set.

Further, the information bits carried on the actually transmitted PBCH block may further include a bandwidth and an antenna number.

In a preferred example, when one transmission time interval is 40ms (e.g., when applied to a base station of LTE), at least a portion of the information in the SFN included in the first time index may be the information bits of the highest eight bits in the SFN. In one variation, when one transmission time interval is 80ms (e.g., when applied to a base station of NR), at least a portion of the system frame number information (hereinafter referred to as SFN) included in the first time index may be the information bits of the highest seven bits in the SFN. Those skilled in the art can change the embodiments according to actual needs, and detailed description is omitted here.

Further, the time index may be an index of the really transmitted PBCH block associated with an index of the really transmitted scrambling code subsequence. For example, the index of the truly transmitted PBCH block may be the same as the index of the truly transmitted scrambling code subsequence.

In a preferred embodiment, the index of the actually transmitted scrambling code subsequence may include an index of an actually transmitted synchronization signal block, so that the user equipment can complete random access (e.g. cell handover) according to the index of the actually transmitted synchronization signal block after detecting the actually transmitted PBCH block.

As a variation, the index of the really transmitted scrambling code subsequence may further comprise the remaining information bits in the SFN in addition to the at least part of the information. For example, when one transmission time interval is 40ms, the remaining information bits of the SFN excluding the at least part of the information may be the lowest two information bits of the SFN. Alternatively, when one transmission time interval is 80ms, the remaining information bits in the SFN excluding the at least part of the information may be the information bits of the highest three bits in the SFN.

Further, the really transmitted scrambling subsequences may be selected from a set of really transmitted scrambling subsequences, which may be a subset of the set of pre-set scrambling subsequences.

Further, the indexes of all the predetermined scrambling subsequences in the predetermined scrambling subsequence set are associated with the indexes of all the predetermined PBCH blocks in a predetermined period (i.e. all the PBCH blocks that may be transmitted in the predetermined period). For example, the indexes of all the preset PBCH blocks in the preset period may be respectively associated with the indexes of the preset scrambling code subsequences in the preset scrambling code subsequences set, and preferably, the association may be the same, that is, the indexes of all the preset PBCH blocks in the preset period may respectively find the indexes of the same preset scrambling code subsequences in the preset scrambling code subsequences set.

In a preferred embodiment, the preset scrambling code subsequence in the preset scrambling code subsequence set is obtained by dividing a preset scrambling code sequence (also referred to as a scrambling code sequence), wherein the length of the scrambling code of the preset scrambling code sequence is equal to the number of coded bits carried on all preset PBCH blocks in the preset period. Further, after the base station generates the preset scrambling code sequence based on the length of the scrambling code, the preset scrambling code sequence is divided into multiple parts (i.e., divided into multiple preset scrambling code subsequences), where the divided parts are determined according to the number of all preset PBCH blocks in the preset period, the multiple divided scrambling code subsequences form the preset scrambling code subsequence set, and an index of each scrambling code subsequence can be determined according to an index of one preset PBCH block in all preset PBCH blocks in the preset period, so that the operation of associating the indexes of all preset scrambling code subsequences included in the preset scrambling code subsequence set with the indexes of all preset PBCH blocks in the preset period is completed.

Preferably, the number of coded bits carried on all the preset PBCH blocks in the preset period may be determined according to the number of Resource elements (RE for short) occupied by all the preset PBCH blocks in the preset period. For example, the number of resource elements multiplied by a preset factor may be used as the coded bit number carried on all the preset PBCH blocks in the preset period. When the PBCH is Quadrature Phase Shift Keying (QPSK) modulated, the predetermined factor is 2.

Preferably, the index of the preset PBCH block may include an index of a preset synchronization signal block and remaining information bits of the SFN excluding the at least part of information. The preset synchronization signal block may be a synchronization signal block that may be transmitted in the preset period.

Further, the total length of the scrambling codes of the actually transmitted scrambling code subsequence may be equal to the number of coded bits carried on all actually transmitted PBCH blocks in the preset period. For example, after the base station determines all PBCH blocks really transmitted in the preset period, for each PBCH block really transmitted, an index of a preset scrambling subsequence associated with the index of the PBCH block really transmitted is selected from the preset scrambling subsequence set, and the PBCH block really transmitted is scrambled based on the preset scrambling subsequence, and at this time, the preset scrambling subsequence becomes the scrambling subsequence really transmitted.

In a typical application scenario, a base station may transmit one or more actually transmitted PBCH blocks within a preset period (e.g., a transmission time interval), and then the base station may select one or more scrambling subsequences corresponding to the one or more actually transmitted PBCH blocks from the preset scrambling subsequence set to form the actually transmitted scrambling subsequence set, and scramble the encoded information bits based on the actually transmitted scrambling subsequence set.

Further, the ue may obtain an index of the synchronization signal block, or the index of the synchronization signal block and all or part of the information of the SFN from the detected at least one PBCH block, thereby completing operations such as random access. Further, the truly transmitted PBCH block may be a PBCH time-frequency resource in the truly transmitted synchronization signal block, and an index of the truly transmitted synchronization signal block is included in an index of the truly transmitted PBCH block, so that when the ue detects and obtains the index of the at least one PBCH block, it is equivalent to obtaining the index of the detected at least one synchronization signal block.

Further, the number of synchronization signal blocks actually transmitted by the base station in the preset period may be less than or equal to the number of preset synchronization signal blocks that the base station may possibly transmit. For example, the number of synchronization signal blocks that the base station may possibly transmit in one transmission time interval is 8, but the number of synchronization signal blocks that the base station really transmits in the current transmission time interval may be 4.

Further, the first time index may be independently encoded and resource mapped to at least one resource subset of the truly transmitted PBCH block. Further, the frequency domain Resource occupied by the at least one Resource subset is a Physical Resource Block (Physical Resource Block, PRB) aligned with a Secondary Synchronization Signal (SSS). Preferably, the truly transmitted PBCH block may include 24 physical resource blocks in the frequency domain, wherein each 6 consecutive physical resource blocks constitute the physical resource block group.

For example, the base station may independently encode the high-order information bits (e.g., the highest eight information bits) in the SFN and take the result of the independent encoding as a payload, and then scramble the information bits in the payload based on the really transmitted scrambling code sub-sequence when performing the step S102.

In a preferred example, the time domain resource occupied by the resource subset may be one or two Orthogonal Frequency Division Multiplexing (OFDM) symbols close to the SSS. Preferably, the SSS may be a reference signal for channel estimation of sub-channels of the SFN and an index of the actually transmitted synchronization signal block.

Referring to fig. 2, the configuration of the Synchronization Signal block in the time slot may be as shown in fig. 2, and in a typical application scenario, the time-frequency resource of the actually transmitted Synchronization Signal block may include a Primary Synchronization Signal (PSS) block a1, a secondary Synchronization Signal block a2, and an actually transmitted PBCH block a 5. The time-frequency resource occupied by the secondary synchronization Signal a2 may also be frequency-division multiplexed with a Mobility Reference Signal (MRS) block a 3.

Further, the truly transmitted PBCH block a5 may occupy 24 PRBs in the frequency domain, the 24 PRBs may be equally divided into 4 physical resource block groups (not shown in the figure), each physical resource block group occupies 6 consecutive PRBs, and then the index of the truly transmitted PBCH block a5 may be rate matched and resource mapped to any one or any plurality of the 4 physical resource block groups. For example, in the synchronization signal block shown in fig. 2, the index a4 of the actually transmitted PBCH block a5 may be rate matched and resource mapped to the middle two physical resource block groups of the 4 physical resource block groups. Preferably, in the time domain, the index a4 of the actually transmitted PBCH block a5 may occupy one symbol after the secondary synchronization signal block a 2.

As a variation, referring to fig. 3, the index a4 of the true transmitted PBCH block a5 may also occupy two symbols after the secondary synchronization signal block a2 in the time domain.

In a variation of this embodiment, the information bits carried on the actually transmitted PBCH block may further include a Cyclic Redundancy Check (CRC) Check code, where the CRC Check code carries a mask, and the mask is associated with an index of the actually transmitted PBCH block. Specifically, before executing the step S101, the following steps may also be executed: and performing a masking operation on the CRC check code to increase the system robustness.

Fig. 4 is a schematic structural diagram of a time-indexed carrier according to a second embodiment of the present invention. Those skilled in the art understand that the carrying device 4 of the present embodiment is used for implementing the technical solutions of the methods described in the embodiments shown in fig. 1 to fig. 3. Specifically, in this embodiment, the carrying apparatus 4 includes an encoding module 42, configured to encode information bits carried on a actually transmitted PBCH block, where the information bits include a first time index, and the first time index includes at least a part of information in system frame number information; a scrambling module 43 for scrambling the encoded information bits based on a really transmitted scrambling subsequence selected from a set of preset scrambling subsequences.

Further, the PBCH block that is actually transmitted is a PBCH time-frequency resource in the synchronization signal block that is actually transmitted.

Further, the time index may be an index of the really transmitted PBCH block, wherein the index of the really transmitted PBCH block is associated with an index of the really transmitted scrambling code subsequence.

Preferably, the index of the actually transmitted scrambling code subsequence comprises an index of an actually transmitted synchronization signal block.

Preferably, the index of the actually transmitted scrambling code subsequence further includes remaining information bits in the system frame number information except for the at least part of information.

Further, the indexes of all the preset scrambling subsequences in the preset scrambling subsequence set are associated with the indexes of all the preset PBCH blocks in a preset period.

Further, the preset scrambling code subsequence in the preset scrambling code subsequence set is formed by dividing a preset scrambling code sequence, wherein the length of the scrambling code of the preset scrambling code sequence is equal to the number of coded bits carried on all preset PBCH blocks in the preset period.

Further, the total length of the scrambling codes of the actually transmitted scrambling code subsequence is equal to the number of coded bits carried on all the actually transmitted PBCH blocks in the preset period.

Further, the first time index is independently encoded and resource mapped to at least one resource subset of the truly transmitted PBCH block.

Further, the frequency domain resources occupied by the at least one subset of resources are physical resource block groups aligned with the secondary synchronization signal, the physical resource block groups including at least one physical resource block.

Preferably, the physical resource block group including at least one physical resource block means: the actually transmitted PBCH block includes 24 physical resource blocks in the frequency domain, wherein each 6 consecutive physical resource blocks constitute the physical resource block group.

Further, the information bits carried on the PBCH block that is actually sent include a CRC check code, where the CRC check code carries a mask, and the mask is associated with the index of the PBCH block that is actually sent, and the carrying device 4 further includes a processing module 41, configured to perform a masking operation on the CRC check code before encoding the information bits carried on the PBCH block that is actually sent.

For more details on the working principle and the working mode of the carrying device 4, reference may be made to the relevant descriptions in fig. 1 to fig. 3, which are not described herein again.

Fig. 5 is a flowchart of a method for detecting a time index according to a third embodiment of the present invention. The time index may be carried in a synchronization signal block sent by a base station; when the user equipment executes the technical scheme of the embodiment, the user equipment can be in a blind detection state. Further, the time index may be carried on PBCH time-frequency resources in the synchronization signal block. Further, the base station carries the time index on the PBCH time-frequency resource based on the technical solution of the method in the embodiments shown in fig. 1 to fig. 3.

Specifically, in this embodiment, the method for detecting the time index may be implemented as follows:

s201, according to at least one detected PBCH block, sequentially selecting at least one preset scrambling subsequence from a preset scrambling subsequence set, wherein the at least one detected PBCH block carries information bits, the information bits comprise a first time index, and the first time index comprises at least one part of information in system frame number information.

S202, for each preset scrambling code subsequence in the at least one preset scrambling code subsequence, descrambling the detected at least one PBCH block based on the preset scrambling code subsequence.

And S203, merging and decoding the at least one PBCH block after descrambling.

And S204, when the decoding is successful, for each preset scrambling code subsequence, acquiring an index of a really transmitted scrambling code subsequence corresponding to the at least one PBCH block based on the preset scrambling code subsequence, wherein the index of the really transmitted scrambling code subsequence comprises an index of a really transmitted synchronization signal block and residual information bits except the at least part of information in the system frame number information.

Further, the preset scrambling code subsequence set is determined by the base station, and indexes of all preset scrambling code subsequences included in the preset scrambling code subsequence set are associated with indexes of all preset PBCH blocks in a preset period. In a preferred embodiment, the preset scrambling code subsequence set can be determined by the base station and then informed to the user equipment in advance; alternatively, the set of predetermined scrambling subsequences may be transmitted by the base station together with the at least one PBCH block.

Further, the preset scrambling code subsequence in the preset scrambling code subsequence set is formed by dividing a preset scrambling code sequence, wherein the length of the scrambling code of the preset scrambling code sequence is equal to the number of coded bits carried on all preset PBCH blocks in the preset period. More specifically, those skilled in the art may refer to the description related to the embodiment shown in fig. 1, which is not repeated herein.

In a preferred example, the technical solution of the embodiment of the present invention may further include the steps of: obtaining the first time index from the decoded at least one PBCH block.

In a typical application scenario, the ue needs to acquire the index of the synchronization signal block based on one detection, and after detecting a PBCH block, the ue may decode the PBCH block by assuming all possible scrambling code subsequences, for example, selecting a scrambling code subsequence from the preset scrambling code subsequence set to descramble the detected PBCH block one by one (e.g., descrambling the detected PBCH block starting from a first scrambling code subsequence in the preset scrambling code subsequence set), and when descrambling is successful, indicating that the scrambling code subsequence currently used for descrambling is a scrambling code subsequence used by the base station to scramble the PBCH block, that is, the index of the scrambling code subsequence currently used for descrambling is the index of the detected PBCH block, and then decoding the detected PBCH block (in the application scenario, only one PBCH block is detected, so merging processing may not be performed), and the index of the synchronization signal block detected this time may be obtained after decoding is successful.

In another application scenario, when the ue needs to acquire the index of the synchronization signal block based on multiple detections, the ue may, after detecting multiple PBCH blocks, descramble the multiple PBCH blocks by assuming a combination of all possible scrambling subsequences, and combine and decode the descrambled multiple PBCH blocks, thereby acquiring the index information of each of the multiple PBCH blocks.

Preferably, when performing descrambling operation, the ue may select one preset scrambling code subsequence from the set of preset scrambling code subsequences as a first preset scrambling code subsequence in the at least one preset scrambling code subsequence; and then selecting one or more preset scrambling code subsequences from the preset scrambling code subsequences set according to the detected relative sequence among the PBCH blocks, and forming the at least one preset scrambling code subsequences with the first preset scrambling code subsequences. For example, since the ue is in a blind detection state, it needs to acquire the indexes of the detected 5 PBCH blocks to determine the timing information in the preset period, and since the relative sequence between each of the 5 PBCH blocks is determined (e.g. the 5 PBCH blocks are sent in time domain sequence and detected by the ue, and each PBCH block is separated by one symbol), the ue may select a preset scrambling code subsequence (corresponding to number 1) arranged at a first position in the preset scrambling code subsequence set as a first preset scrambling code subsequence in the at least one preset scrambling code subsequence, and then select four scrambling code subsequences (corresponding to numbers of 3, 5, 7, and 9, respectively) arranged at the first position from the preset scrambling code subsequence arranged at intervals of one preset scrambling code subsequence, where the numbers of 1, 9, or a combination thereof, 3. 5, 7, 9 to form at least one preset scrambling subsequence.

Further, when the decoding is successful, that is, the combination of the at least one scrambling code subsequence is the combination of the scrambling code subsequences used when the base station scrambles the plurality of PBCH blocks, the index of the detected plurality of synchronization signal blocks can be deduced.

Further, when the preset period is long enough, for example, a transmission time interval (80ms) in a 5G system is taken as the preset period, the ue determines the scrambling code subsequence or the combination of the scrambling code subsequences according to one or more detections, and then may determine the index of the synchronization signal block and a part of the SFN according to the index of the scrambling code subsequence.

In a variation, the user equipment may process the at least one subset of resources separately to obtain the first time index when the base station independently encodes and resource maps the first time index to the at least one subset of resources of the detected at least one PBCH block. For example, the base station may encode the high-order information bits of the SFN to serve as a load, and then scramble the encoded information bits (the technical solution of the method in the embodiment shown in fig. 1 may be adopted), and the user equipment detects and obtains the first time index from the load through the technical solution of this embodiment. Further, the ue may further detect and obtain the index of the actually transmitted scrambling code subsequence from other resource subsets of the PBCH block through the technical solution of this embodiment, and the set of the index of the actually transmitted scrambling code subsequence and the first time index may be all time indexes that can be carried by the base station.

In another variation, the information bits carried on the at least one PBCH block may further include a CRC check code, where the CRC check code carries a mask, and the mask is associated with an index of the at least one PBCH block, and the technical solution of this embodiment may further include the steps of: performing a CRC check code masking operation on the at least one PBCH block when decoding of the at least one PBCH block is successful.

In yet another variation, when the at least one preset scrambling code subsequence selected in the step S201 fails to descramble the detected at least one PBCH block, the ue may repeatedly perform the step S201 to select another one or more preset scrambling code subsequences from the set of preset scrambling code subsequences to form a new at least one scrambling code subsequence, and perform the descrambling operation of the step S202 based on the new at least one scrambling code subsequence until the descrambling operation is successful, and then perform the step S203.

Fig. 6 is a schematic structural diagram of a time index detection apparatus according to a fourth embodiment of the present invention. Those skilled in the art understand that the detecting device 6 of the present embodiment is used to implement the method technical solution described in the embodiment shown in fig. 5. Specifically, in this embodiment, the detecting device 6 includes a selecting module 61, configured to sequentially select at least one preset scrambling code subsequence from a preset scrambling code subsequence set according to at least one detected PBCH block, where the at least one detected PBCH block carries information bits, where the information bits include a first time index, and the first time index includes at least a part of information in system frame number information; a descrambling module 62 configured to descramble the detected at least one PBCH block based on each of the at least one predetermined scrambling subsequence; a merging and decoding module 63, configured to merge and decode at least one PBCH block after descrambling; a first obtaining module 65, configured to, when the decoding is successful, obtain, for each preset scrambling subsequence, an index of a really transmitted scrambling subsequence corresponding to the at least one PBCH block based on the preset scrambling subsequence, where the index of the really transmitted scrambling subsequence includes an index of a really transmitted synchronization signal block and remaining information bits in the system frame number information except for the at least part of information.

Further, the preset scrambling code subsequence set is determined by the base station, and indexes of all preset scrambling code subsequences included in the preset scrambling code subsequence set are associated with indexes of all preset PBCH blocks in a preset period.

Further, the detecting device 6 further includes a second obtaining module 66, configured to obtain the first time index from the decoded at least one PBCH block.

In a preferred embodiment, the number of the at least one preset scrambling code subsequence is greater than one, and the selecting module 61 includes a selecting sub-module 611, configured to select one preset scrambling code subsequence from the set of preset scrambling code subsequences as a first preset scrambling code subsequence of the at least one preset scrambling code subsequence; a selecting and combining sub-module 612, configured to select one or more preset scrambling code subsequences from the set of preset scrambling code subsequences according to the detected relative order between PBCH blocks, and form the at least one preset scrambling code subsequence with the first preset scrambling code subsequence.

In a variation, the information bits carried on the at least one PBCH block further include a CRC check code, where the CRC check code carries a mask, and the mask is associated with an index of the at least one PBCH block, and the detection apparatus 6 further includes a de-masking module 64, where when the decoding of the at least one PBCH block is successful, the de-CRC check code masking operation is performed on the at least one PBCH block.

For more details of the operation principle and the operation mode of the detection device 6, reference may be made to the description in fig. 5, which is not described herein again.

Further, the embodiment of the present invention also discloses a storage medium, on which computer instructions are stored, and when the computer instructions are executed, the method technical solutions described in the embodiments shown in fig. 1 to fig. 3 and fig. 5 are executed. Preferably, the storage medium may include a computer-readable storage medium. The storage medium may include ROM, RAM, magnetic or optical disks, etc.

Further, the embodiment of the present invention also discloses a base station, which includes a memory and a processor, where the memory stores computer instructions capable of running on the processor, and the processor executes the computer instructions to execute the technical solutions of the methods in the embodiments shown in fig. 1 to fig. 3.

Further, an embodiment of the present invention further discloses a terminal, which includes a memory and a processor, where the memory stores a computer instruction capable of running on the processor, and the processor executes the method technical solution in the embodiment shown in fig. 5 when running the computer instruction. Preferably, the terminal may be the user equipment.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A time index bearing method is characterized by comprising the following steps:

coding information bits carried on a truly transmitted PBCH block, wherein the information bits comprise a first time index, and the first time index comprises at least part of information in system frame number information;

scrambling the encoded information bits based on a really transmitted scrambling code subsequence, wherein the really transmitted scrambling code subsequence is selected from a preset scrambling code subsequence set, an index of the really transmitted scrambling code subsequence comprises an index of a really transmitted synchronization signal block, and the index of the really transmitted scrambling code subsequence further comprises residual information bits except the at least part of information in the system frame number information.

2. The bearer method according to claim 1, wherein the PBCH block actually transmitted is a PBCH time-frequency resource in a synchronization signal block actually transmitted.

3. The bearer method according to claim 1, wherein the time index is: an index of the really transmitted PBCH block, wherein the index of the really transmitted PBCH block is associated with an index of the really transmitted scrambling code subsequence.

4. The bearer method according to claim 1, wherein the indexes of all the predetermined scrambling subsequences in the predetermined set of scrambling subsequences are associated with the indexes of all the predetermined PBCH blocks in a predetermined period.

5. The carrying method according to claim 4, wherein the preset scrambling code subsequences in the preset scrambling code subsequences set are obtained by dividing preset scrambling code sequences, wherein the length of the scrambling codes of the preset scrambling code sequences is equal to the number of coded bits carried on all preset PBCH blocks in the preset period.

6. The bearer method according to claim 4, wherein the total length of the scrambling codes of the actually transmitted scrambling code sub-sequence is equal to the number of coded bits carried on all actually transmitted PBCH blocks in the preset period.

7. The bearer method of claim 1, wherein the first time index is independently encoded and resource mapped to at least a subset of resources of the truly transmitted PBCH block.

8. The bearer according to claim 7, wherein the frequency domain resources occupied by the at least one subset of resources are a physical resource block group aligned with the secondary synchronization signal, and wherein the physical resource block group comprises at least one physical resource block.

9. The bearer method according to claim 8, wherein the physical resource block group including at least one physical resource block refers to: the actually transmitted PBCH block includes 24 physical resource blocks in the frequency domain, wherein each 6 consecutive physical resource blocks constitute the physical resource block group.

10. The bearer method according to claim 1, wherein the information bits carried on the actually transmitted PBCH block further include a CRC check code, and wherein the CRC check code carries a mask, and wherein the mask is associated with the index of the actually transmitted PBCH block, and before encoding the information bits carried on the actually transmitted PBCH block, the method further includes:

and performing a masking operation on the CRC check code.

11. A time-indexed bearer, comprising:

an encoding module, configured to encode information bits carried on a actually sent PBCH block, where the information bits include a first time index, and the first time index includes at least a part of information in system frame number information;

and a scrambling module, configured to scramble the encoded information bits based on a really transmitted scrambling code subsequence, where the really transmitted scrambling code subsequence is selected from a preset scrambling code subsequence set, an index of the really transmitted scrambling code subsequence includes an index of a really transmitted synchronization signal block, and the index of the really transmitted scrambling code subsequence further includes remaining information bits in the system frame number information except for the at least part of information.

12. The bearer apparatus of claim 11, wherein the true transmitted PBCH block is a PBCH time-frequency resource in a true transmitted synchronization signal block.

13. The carrier device of claim 11, wherein the time index is: an index of the really transmitted PBCH block, wherein the index of the really transmitted PBCH block is associated with an index of the really transmitted scrambling code subsequence.

14. The carrier apparatus of claim 11, wherein indexes of all the predetermined scrambling subsequences in the set of predetermined scrambling subsequences are associated with indexes of all predetermined PBCH blocks in a predetermined period.

15. The carrying apparatus according to claim 14, wherein the preset scrambling subsequences in the preset scrambling subsequence set are obtained by dividing a preset scrambling sequence, wherein a length of a scrambling code of the preset scrambling sequence is equal to a number of coded bits carried on all preset PBCH blocks in the preset period.

16. The bearer apparatus of claim 14, wherein a total length of the scrambling codes of the actually transmitted scrambling code sub-sequence is equal to the number of coded bits carried on all actually transmitted PBCH blocks in the preset period.

17. The bearer apparatus of claim 11, wherein the first time index is independently encoded and resource mapped to at least a subset of resources of the true transmitted PBCH block.

18. The carrier of claim 17, wherein the frequency domain resources occupied by the at least one subset of resources are a physical resource block group aligned with a secondary synchronization signal, and wherein the physical resource block group comprises at least one physical resource block.

19. The carrier apparatus according to claim 18, wherein the physical resource block group including at least one physical resource block refers to: the actually transmitted PBCH block includes 24 physical resource blocks in the frequency domain, wherein each 6 consecutive physical resource blocks constitute the physical resource block group.

20. The bearer apparatus of claim 11, wherein the information bits carried on the truly transmitted PBCH block further include a CRC check code, and wherein the CRC check code carries a mask, and wherein the mask is associated with an index of the truly transmitted PBCH block, the bearer apparatus further comprising: and the processing module is used for performing a masking operation on the CRC check code before coding the information bits carried on the PBCH block which is really sent.

21. A method for detecting a time index, comprising:

sequentially selecting at least one preset scrambling code subsequence from a preset scrambling code subsequence set according to at least one detected PBCH block, wherein the at least one detected PBCH block carries information bits, the information bits comprise a first time index, and the first time index comprises at least part of information in system frame number information;

for each of the at least one preset scrambling code subsequence, descrambling the detected at least one PBCH block based on the preset scrambling code subsequence;

combining and decoding the descrambled at least one PBCH block;

and when the decoding is successful, for each preset scrambling code subsequence, acquiring an index of a really transmitted scrambling code subsequence corresponding to the at least one PBCH block based on the preset scrambling code subsequence, wherein the index of the really transmitted scrambling code subsequence comprises the index of the really transmitted synchronization signal block and the rest information bits except the at least part of information in the system frame number information.

22. The detecting method according to claim 21, wherein the set of predetermined scrambling subsequences is determined by a base station, and wherein the indexes of all predetermined scrambling subsequences included in the set of predetermined scrambling subsequences are associated with the indexes of all predetermined PBCH blocks in a predetermined period.

23. The detecting method according to claim 22, wherein the preset scrambling subsequences in the preset scrambling subsequence set are obtained by dividing preset scrambling sequences, wherein the length of the scrambling codes of the preset scrambling sequences is equal to the number of coded bits carried on all preset PBCH blocks in the preset period.

24. The detection method according to claim 21, further comprising:

obtaining the first time index from the decoded at least one PBCH block.

25. The detecting method according to claim 21, wherein the number of the at least one predetermined scrambling subsequence is greater than one, and said sequentially selecting at least one predetermined scrambling subsequence from the predetermined scrambling subsequence set comprises:

selecting a preset scrambling code subsequence from the preset scrambling code subsequence set as a first preset scrambling code subsequence in the at least one preset scrambling code subsequence;

and selecting one or more preset scrambling code subsequences from the preset scrambling code subsequences set according to the detected relative sequence among the PBCH blocks, and forming at least one preset scrambling code subsequences with the first preset scrambling code subsequences.

26. The method of claim 21, wherein the information bits carried on the at least one PBCH block further include a CRC check code, wherein the CRC check code carries a mask, wherein the mask is associated with an index of the at least one PBCH block, and wherein when the decoding of the at least one PBCH block is successful, the method further comprises:

and performing a CRC check code masking operation on the at least one PBCH block.

27. A time-indexed detection apparatus, comprising:

a selecting module, configured to sequentially select at least one preset scrambling code subsequence from a preset scrambling code subsequence set according to at least one detected PBCH block, where the at least one detected PBCH block carries information bits, where the information bits include a first time index, and the first time index includes at least a part of information in system frame number information;

a descrambling module configured to descramble the detected at least one PBCH block based on each of the at least one predetermined scrambling code subsequence;

a merging decoding module, configured to merge and decode at least one PBCH block after descrambling;

and a first obtaining module, configured to, for each preset scrambling subsequence, obtain, based on the preset scrambling subsequence, an index of a truly transmitted scrambling subsequence corresponding to the at least one PBCH block, where the index of the truly transmitted scrambling subsequence includes an index of a truly transmitted synchronization signal block and remaining information bits in the system frame number information except for the at least part of information.

28. The apparatus of claim 27, wherein the set of predetermined scrambling subsequences is determined by a base station, and wherein indexes of all predetermined scrambling subsequences included in the set of predetermined scrambling subsequences are associated with indexes of all predetermined PBCH blocks in a predetermined period.

29. The apparatus according to claim 28, wherein the predetermined scrambling subsequences in the predetermined scrambling subsequences set are obtained by dividing predetermined scrambling sequences, and wherein the length of the scrambling codes of the predetermined scrambling sequences is equal to the number of coded bits carried on all predetermined PBCH blocks in the predetermined period.

30. The detection device of claim 27, further comprising:

a second obtaining module, configured to obtain the first time index from the decoded at least one PBCH block.

31. The detecting device according to claim 27, wherein the number of the at least one predetermined scrambling subsequence is greater than one, and the selecting module comprises:

a selecting sub-module, configured to select a preset scrambling code sub-sequence from the preset scrambling code sub-sequence set as a first preset scrambling code sub-sequence in the at least one preset scrambling code sub-sequence;

and the selection combination sub-module is used for selecting one or more preset scrambling code sub-sequences from the preset scrambling code sub-sequence set according to the detected relative sequence among the PBCH blocks, and the selection combination sub-module and the first preset scrambling code sub-sequence form at least one preset scrambling code sub-sequence.

32. The apparatus of claim 27, wherein the information bits carried on the at least one PBCH block further comprise a CRC check code, wherein the CRC check code carries a mask, and wherein the mask is associated with an index of the at least one PBCH block, the apparatus further comprising:

and the de-masking module is used for performing de-CRC check code masking operation on the at least one PBCH block when the decoding of the at least one PBCH block is successful.

33. A storage medium having stored thereon computer instructions, which when executed by a processor, perform the steps of the method of any one of claims 1 to 10 or 21 to 26.

34. A base station comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the method of any one of claims 1 to 10.

35. A terminal comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the method of any one of claims 21 to 26.