WO2021027694A1

WO2021027694A1 - Ssb candidate position index indication method and apparatus, ssb candidate position index receiving method and apparatus, storage medium, base station, and user equipment

Info

Publication number: WO2021027694A1
Application number: PCT/CN2020/107602
Authority: WO
Inventors: 周欢
Original assignee: 北京紫光展锐通信技术有限公司
Priority date: 2019-08-09
Filing date: 2020-08-07
Publication date: 2021-02-18
Also published as: CN110336655A; CN110336655B

Abstract

An SSB candidate position index indication method and apparatus, an SSB candidate position index receiving method and apparatus, a storage medium, a base station, and a user equipment. The SSB candidate position index indication method comprises: determining the maximum number of SSB candidate position indexes capable of being sent in a DRS transmission window under the current subcarrier space; determining the number of bits occupied for sending the SSB candidate position indexes according to the maximum number of the SSB candidate position indexes; determining to indicate the SSB candidate position indexes by adopting the highest P bits in a PBCH payload and a sequence of a DMRS according to the number of bits, or indicate the SSB candidate position indexes by adopting original SSB index bits and newly added index bits in the PBCH load, wherein the sequence of the DMRS occupies Q bits, and P is a difference between the number of bits and Q; and sending an SSB, the SSB comprising the PBCH payload. According to the technical solution of the present invention, the SSB candidate position index can be indicated in an unlicensed frequency band higher than 6 GHz.

Description

SSB candidate position index indication, receiving method and device, storage medium, base station, user equipment

This application requires the priority of a Chinese patent application filed with the Chinese Patent Office on August 9, 2019, the application number is 2019107345674, and the invention title is "SSB candidate position index indication, receiving method and device, storage medium, base station, user equipment". The entire content is incorporated into this application by reference.

Technical field

The present invention relates to the field of communication technology, and in particular to an SSB candidate position index indication, a receiving method and device, a storage medium, a base station, and user equipment.

Background technique

The 3rd Generation Partnership Project (3rd Generation Partnership Project, 3GPP) New Radio (NR) system in the time domain length of 10ms radio frame, each radio frame is divided into 10 the same size of the length of 1ms Each subframe may include multiple slots (slots) according to different subcarrier intervals. Each time slot consists of a certain number of symbols, and the number of symbols is determined by the type of cyclic prefix (CP). The NR system supports multi-beam synchronization signal (Synchronzation Signal, SS), secondary synchronization signal and physical broadcast channel (Physical Broadcast Channel, PBCH) transmission. A synchronization signal block (Synchronzation Signal, SSB) (also called SS/PBCH block) usually occupies 4 OFDM symbols, and its position within the search window is related to the sub-carrier space (SCS) and the number of beams L. Multiple SSBs form an SSB set, and the maximum number of SSBs that can be sent in the SSB set is recorded as Lmax. Lmax=4 in the frequency band below 3GHz, Lmax=8 in the frequency band below 5GHz, and Lmax=64 in the frequency band above 5GHz.

The PBCH payload (payload) consists of 2 parts, one part is the master information block (Master Information Block, MIB) payload, a total of 24 bits (bit); the other part is 8 bits, including the 4-bit system frame number (System Frame Number, SFN) ) Low 4 bits

1bit half frame indication

3bit

The index of the SSB candidate position. The MIB payload information includes system frame number, subcarrier spacing, SSB subcarrier offset, demodulation reference signal (DMRS) type A (type A) position, and SIB1 physical downlink control channel (Physical Downlink Control Channel). , PDCCH) configuration, whether the cell is forbidden, co-frequency reselection and 1bit reservation. And the SIB1PDCCH configuration includes two parts of information: control resource set 0 and search space 0 information.

3GPP NR-U (unlicense, unlicensed) technology is to study how to apply NR system in unlicensed frequency bands, among which, due to the discontinuous transmission of unlicensed cells, it is necessary to design a discovery reference signal (Discover Reference Signal, DRS) to undertake cell identification and synchronization With the function of Radio Resource Management (RRM) measurement, NR-U is designed in the unlicensed frequency band below 6GHz, and the maximum length of a DRS transmission window is 5ms. Multiple SSB candidate positions can be sent in one discovery reference signal window, and can be more than the Lmax value in the licensed spectrum. For example, when the subcarrier spacing is 15kHz, there are 10 candidate positions; there are 20 candidate positions in 30kHz. These SSB candidate position indexes are jointly indicated by the 8 sequences of PBCH DMRS and 1 bit or 2 bits in the original 3bit SSB candidate position index of the PBCH payload.

However, in unlicensed frequency bands higher than 6 GHz, NR-U has not yet determined the length of the DRS transmission window and how to indicate the SSB candidate position index.

Summary of the invention

The technical problem solved by the present invention is how to indicate the SSB candidate position index in an unlicensed frequency band higher than 6 GHz.

In order to solve the above technical problem, an embodiment of the present invention provides a method for indicating an SSB candidate position index. The method for indicating an SSB candidate position index includes: determining the maximum number of SSB candidate position indexes that can be sent in the DRS transmission window under the current subcarrier interval; Determine the number of bits occupied by sending the SSB candidate position index according to the maximum number of the SSB candidate position index; use the highest P bit in the PBCH payload and the sequence of DMRS to indicate the SSB candidate position index according to the number of bits, or use The original SSB index bit and the newly added index bit in the PBCH load indicate the SSB candidate position index, where the sequence of the DMRS occupies Q bits, and P is the difference between the number of bits and Q; the SSB is sent, so The SSB includes the PBCH payload.

Optionally, the determining the maximum number of SSB candidate position indexes that can be sent in the DRS transmission window under the current subcarrier interval includes: determining the length of the DRS transmission window; calculating the number coefficient under the current subcarrier interval, The number coefficient is the number of time units included in the time unit used by the DRS transmission window; the maximum number of the SSB candidate position index is determined according to the length of the DRS transmission window, wherein the SSB candidate position index The maximum number M is the product of the length of the DRS transmission window, the number of SSBs contained in the time unit, and the number coefficient.

Optionally, the determining according to the number of bits to use the highest P bit in the PBCH payload and a sequence of DMRS to indicate the SSB candidate position index includes: if the number of bits is Q+4, then using the highest P bit in the PBCH payload The highest four bits and the sequence of the DMRS indicate the SSB candidate position index; if the number of bits is Q+5, the highest five bits in the PBCH payload and the sequence of the DMRS are used to indicate the SSB candidate Location index.

Optionally, the highest four bits in the PBCH payload include the original SSB index bit and the half-frame indicator bit; the highest five bits in the PBCH payload include the original SSB index bit, the half-frame indicator bit, and the lowest system frame number Bit.

Optionally, the SSB candidate position index indication method further includes: using the original values of the half-frame indicator bits in the PBCH payload and the lowest bit of the system frame number to use idle bits in the main information block payload. Instructions.

Optionally, the idle bits in the payload of the master information block are selected from: part of the idle bits in the search space 0 in the physical downlink control channel configuration field of the system information block 1, reserved bits, and bits occupied by subcarrier interval indication.

Optionally, the SSB candidate position index indication method further includes: configuring the original value of the half-frame indicator bit and the lowest bit of the system frame number in the PBCH payload to a fixed value.

Optionally, when the highest four bits in the PBCH payload and the sequence of the DMRS are used to indicate the SSB candidate position index, the period of the DRS is greater than 5 milliseconds; the highest five bits in the PBCH payload and the When the DMRS sequence indicates the SSB candidate position index, the period of the DRS is greater than 10 milliseconds.

Optionally, the determining according to the number of bits to use the original SSB index bits and the newly added index bits in the PBCH load to indicate the SSB candidate position index includes: according to the number of bits and the original SSB index bits occupied The number of bits determines the number of bits occupied by the newly added index bits, where the number of bits occupied by the original SSB index bits is 3; the 3 bits occupied by the original SSB index bits and the bit indication occupied by the newly added index bits are used The SSB candidate position index.

In order to solve the above technical problem, the embodiment of the present invention also discloses a method for receiving SSB candidate position index. The method for receiving SSB candidate position index includes: receiving SSB, the SSB includes the PBCH payload; determining that the current subcarrier interval can be used in DRS The maximum number of SSB candidate position indexes sent in the transmission window; determine the number of bits occupied by sending the SSB candidate position index according to the maximum number of the SSB candidate position indexes; determine the highest P in the PBCH payload according to the number of bits Bit, and determine the SSB candidate position index according to the highest P bit in the PBCH payload and the sequence of DMRS, or determine the SSB candidate position index according to the original SSB index bit in the PBCH payload and the newly added index bit, P Is the difference between the number of bits and Q.

In order to solve the above technical problem, the embodiment of the present invention also discloses an SSB candidate position index indicating device. The SSB candidate position index indicating device includes: a maximum number determining module to determine whether it can be sent in the DRS transmission window under the current subcarrier interval The maximum number of SSB candidate position indexes of the SSB; the bit number determining module is used to determine the number of bits occupied by sending the SSB candidate position index according to the maximum number of the SSB candidate position indexes; the indicating module is used to determine the The highest P bit in the PBCH payload and the sequence of the DMRS are used to indicate the SSB candidate position index, or the original SSB index bit and the newly added index bit in the PBCH load are used to indicate the SSB candidate position index, where the sequence of the DMRS Occupies Q bits, and P is the difference between the number of bits and Q; the SSB sending module is used to send the SSB, and the SSB includes the PBCH payload.

The embodiment of the present invention also discloses an SSB candidate position index receiving device. The SSB candidate position index receiving device includes: an SSB receiving module to receive the SSB, the SSB including the PBCH payload; and a maximum number determining module to determine the current The maximum number of SSB candidate position indexes that can be sent in the DRS transmission window under the subcarrier interval; the bit number determining module is used to determine the number of bits occupied by sending the SSB candidate position index according to the maximum number of SSB candidate position indexes; SSB The candidate position index determination module is configured to determine the highest P bit in the PBCH payload according to the number of bits, and determine the SSB candidate position index according to the highest P bit in the PBCH payload and the sequence of DMRS, or The SSB candidate position index is determined according to the original SSB index bit and the newly added index bit in the PBCH load, and P is the difference between the number of bits and Q.

The embodiment of the present invention also discloses a storage medium on which computer instructions are stored, and the computer instructions execute the steps of the SSB candidate position index indication method or execute the steps of the SSB candidate position index receiving method when the computer instructions are run.

The embodiment of the present invention also discloses a base station, including a memory and a processor. The memory stores computer instructions that can run on the processor. The processor executes the SSB candidate when the computer instructions are executed. The position index indicates the steps of the method.

The embodiment of the present invention also discloses a user equipment, including a memory and a processor. The memory stores computer instructions that can run on the processor. The processor executes the SSB when the computer instructions are executed. The steps of the candidate location index receiving method.

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

In the technical solution of the present invention, by determining the maximum number of SSB candidate position indexes that can be sent in the DRS transmission window under the current subcarrier interval, the number of bits required to send the SSB candidate position index can be determined, and the PBCH is effective according to the number of bits. The highest P bit in the payload and the sequence of the DMRS indicate the SSB candidate position index, or the original SSB index bit and the newly added index bit in the PBCH payload are used to indicate the SSB candidate position index. The technical solution of the present invention directly adds index bits in the PBCH, and combines the newly added index bits and the original SSB index bits to indicate the SSB candidate position index, which can meet the need to indicate more SSB candidate positions in the unlicensed frequency band higher than 6GHz Index requirements; in addition, the highest P bit in the PBCH payload and the sequence of DMRS can also be used to jointly indicate the SSB candidate position index. On the basis of meeting the requirement of indicating more SSB candidate position indexes, it can also avoid the increase PBCH load, so as to avoid affecting the transmission performance of PBCH.

Further, the highest four bits in the PBCH payload include the original SSB index bit and the half-frame indicator bit; the highest five bits in the PBCH payload include the original SSB index bit, the half-frame indicator bit, and the lowest bit of the system frame number . The original values of the half-frame indicator bits in the PBCH payload and the lowest bit of the system frame number are indicated by idle bits in the main information block payload. In the technical solution of the present invention, since indicating more candidate position indexes will occupy the half-frame indicator bit or the lowest bit of the system frame number in the PBCH load, the original value of the half-frame indicator bit or the lowest bit of the system frame number can be adopted as the main information The idle bit in the block payload is indicated, so that the original function of the PBCH can be guaranteed on the basis of meeting the requirement of indicating more SSB candidate position indexes, and thus the transmission performance between the base station and the user equipment.

Further, the original values of the half-frame indicator bit and the lowest bit of the system frame number in the PBCH payload are configured to be fixed values. In the technical solution of the present invention, since indicating more candidate position indexes will occupy the half-frame indicator bit or the lowest bit of the system frame number in the PBCH load, the original value of the frame indicator bit or the lowest bit of the system frame number can be fixed directly. On the one hand, the original function of the PBCH is guaranteed, and on the other hand, it can avoid occupying the effective load of the main information block, which further ensures the transmission performance.

Description of the drawings

FIG. 1 is a flowchart of a method for indicating SSB candidate position indexes according to an embodiment of the present invention;

FIG. 2 is a flowchart of a specific implementation of step S101 shown in FIG. 1;

FIG. 3 is a flowchart of a specific implementation of step S103 shown in FIG. 1;

FIG. 4 is a flowchart of another specific implementation of step S103 shown in FIG. 1;

FIG. 5 is a flowchart of a method for receiving an SSB candidate position index according to an embodiment of the present invention;

6 is a schematic structural diagram of an SSB candidate position index indicating device according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an apparatus for receiving an SSB candidate position index according to an embodiment of the present invention.

detailed description

As described in the background art, in the unlicensed frequency band higher than 6 GHz, NR-U has not yet determined the length of the DRS transmission window and how to indicate the SSB candidate position index.

The inventor of the present application has discovered through research that if the DRS transmission window with a length of 5ms is still used in the NR-U frequency band above 5GHz and the subcarrier interval is 60kHz, a maximum of 40 SSB candidate position indexes need to be sent, and a maximum of 6bit is required; When the carrier interval is 120KHz, a maximum of 80 SSB candidate position indexes need to be sent, and a maximum of 7 bits are required; when the subcarrier interval is 240KHz, a maximum of 160 SSB candidate position indexes need to be sent, and a maximum of 8 bits are required. However, the SSB candidate position index in the payload of PBCH, DMRS and PBCH is up to 6 bits.

In the technical solution of the present invention, since indicating more candidate position indexes will occupy the half-frame indicator bit or the lowest bit of the system frame number in the PBCH load, the original value of the half-frame indicator bit or the lowest bit of the system frame number can be adopted as the main information The idle bit in the block payload is indicated, so that the original function of the PBCH can be guaranteed on the basis of meeting the requirement of indicating more SSB candidate position indexes, and thus the transmission performance between the base station and the user equipment.

In order to make the above objectives, features and advantages of the present invention more obvious and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 is a flowchart of a method for indicating SSB candidate position indexes according to an embodiment of the present invention.

The SSB candidate position index indication method may be executed by a network side device, for example, a base station may execute each step shown in FIG. 1.

The SSB candidate position index indication method may specifically include the following steps:

Step S101: Determine the maximum number of SSB candidate position indexes that can be sent in the DRS transmission window under the current subcarrier interval;

Step S102: Determine the number of bits occupied by sending the SSB candidate position index according to the maximum number of the SSB candidate position index;

Step S103: Determine according to the number of bits to use the highest P bit in the PBCH payload and the sequence of DMRS to indicate the SSB candidate position index, or use the original SSB index bit and the newly added index bit in the PBCH payload to indicate the SSB candidate Position index, where the DMRS sequence occupies Q bits, and P is the difference between the number of bits and Q;

Step S104: Send an SSB, where the SSB includes the PBCH payload.

It should be pointed out that the sequence number of each step in this embodiment does not represent a limitation on the execution order of each step.

In the specific implementation of step S101, in an unlicensed frequency band higher than 6 GHz, the maximum number of SSB candidate position indexes that can be sent in the DRS transmission window under the current subcarrier interval can be determined. The maximum number is positively correlated with the size of the current subcarrier interval and the time length of the DRS transmission window.

The SSB candidate position index may indicate the position of the SSB in the time domain, for example, it may indicate which slot the SSB is located in.

For example, the length of the DRS transmission window still uses the 5ms in the prior art. When the current subcarrier interval is 60kHz, the maximum number of SSB candidate position indexes can be 80; the length of the DRS transmission window still uses the 5ms in the prior art. When the subcarrier spacing is 120kHz, the maximum number of SSB candidate position indexes can be 160.

In a specific embodiment of the present invention, please refer to FIG. 2. Step S101 shown in FIG. 1 may include the following steps:

Step S201: Determine the length of the DRS transmission window;

Step S202: Calculate a quantity coefficient under the current subcarrier interval, where the quantity coefficient is the number of time units included in the time unit used by the DRS transmission window;

Step S203: Determine the maximum number of SSB candidate position indexes according to the length of the DRS transmission window, where the maximum number M of the SSB candidate position indexes is the length of the DRS transmission window and the time unit contained The product of the number of SSBs and the number coefficient.

In the specific implementation of step S201, the unit of the length of the DRS transmission window may be a time unit, for example, may be milliseconds. Specifically, it can be determined that the length of the DRS transmission window is N milliseconds.

In the unlicensed frequency band higher than 6 GHz, the length of the DRS transmission window may be 5 ms in the prior art. In the prior art, when the length of the DRS transmission window is 5 ms and the subcarrier interval is 15 kHz, 10 SSB candidate position indexes can be provided. As the sub-carrier spacing increases, the number of time slots increases, and the candidate position indexes that can be provided also increase. The quantity coefficient is the number of time units included in the time unit used by the DRS transmission window, where the time unit may be a frame (for example, 1 ms), and the time unit may be a time slot. The quantity coefficient under the current subcarrier interval can be obtained by calculating the current subcarrier interval and the multiple of the subcarrier interval 15kHz.

That is, in step S202, the number coefficient S=R/15 is calculated, where R is the current subcarrier interval.

Those skilled in the art should understand that, in the NR system, the time length of the time slot may vary with the subcarrier interval, for example, it may be 0.5 ms, 0.2 ms, etc., which is not limited in the embodiment of the present invention.

Furthermore, in step S203, the maximum number of SSB candidate position indexes M is calculated, where M=2×N×S, where 2 represents the number of SSBs contained in the time unit, that is, the number of SSBs contained in a single time slot The number of SSB is 2.

It should be noted that the length of the DRS transmission window can also be any other implementable value. For example, when the subcarrier spacing is 240kHz, the length of the DRS transmission window may be reduced. When 80 candidate position indexes need to be provided, The time length of the DRS transmission window can be 2.5 ms; when 128 candidate position indexes need to be provided, the time length of the DRS transmission window can be 4 ms.

1, in the specific implementation of step S102, the number of bits occupied for sending the SSB candidate position index can be determined according to the maximum number of the SSB candidate position index. That is, the number of SSB candidate position indexes that can be indicated by the number of bits is greater than or equal to the maximum number. For example, the maximum number<=2 ^T , where T is the number of bits, and 2 ^T represents the number of SSB candidate position indexes that can be indicated when the number of bits is T.

For example, when the maximum number M is 80, the number of bits T to be occupied may be 7; when the maximum number M is 160, the number of bits T to be occupied may be 8.

As described in the background art, the SSB candidate position index in the PBCH, DMRS and PBCH payload in the prior art is up to 6 bits, but the number of bits T determined in step S102 that needs to be occupied may be greater than 6, for example, 7 bits or 8 bits. Therefore, in the specific implementation of step S103, the highest P bit in the PBCH payload and the sequence of DMRS can be used to indicate the SSB candidate position index, or the original SSB index bit and the newly added index bit in the PBCH payload can be used to indicate the SSB Candidate position index.

Specifically, the sequence of the DMRS occupies Q bits, and the value of Q may be 3.

The embodiment of the present invention directly adds an index bit in the PBCH, and combines the newly added index bit and the original SSB index bit to indicate the SSB candidate position index, which can satisfy the need to indicate more SSB candidate positions in the unlicensed frequency band higher than 6 GHz. Index requirements; in addition, the highest P bit in the PBCH payload and the sequence of DMRS can also be used to jointly indicate the SSB candidate position index. On the basis of meeting the requirement of indicating more SSB candidate position indexes, it can also avoid the increase PBCH load, so as to avoid affecting the transmission performance of PBCH.

In a non-limiting embodiment of the present invention, please refer to FIG. 3. Step S103 shown in FIG. 1 may include the following steps:

Step S301: If the number of bits is Q+4, the highest four bits in the PBCH payload and the sequence of the DMRS are used to indicate the SSB candidate position index;

Step S302: If the number of bits is Q+5, the highest five bits in the PBCH payload and the sequence of the DMRS are used to indicate the SSB candidate position index.

It should be noted that one of step S301 and step S302 can be selectively executed according to actual application scenarios.

In specific implementation, the number of DMRS sequences is 8, occupying 3 bits in total. When the number of bits occupied by the SSB candidate position index is 7, in addition to the 3 bits occupied by the DMRS sequence, four bits are required, and the highest four bits in the PBCH payload can be used. For example, combining the sequence of DMRS and the PBCH payload

Commonly indicates the SSB candidate position index.

Similarly, when the number of bits occupied by the SSB candidate position index is 8, in addition to the 3 bits occupied by the DMRS sequence, five bits are required, and the highest five bits in the PBCH payload can be used. For example, combining the sequence of DMRS and the PBCH payload

Commonly indicates the SSB candidate position index.

Further, the highest four bits in the PBCH payload include the original SSB index bit and the half-frame indicator bit; the highest five bits in the PBCH payload include the original SSB index bit, the half-frame indicator bit, and the lowest bit of the system frame number .

As mentioned earlier, in the payload of the PBCH, the original SSB index occupies 3 bits, that is

The field indicator bit is

The highest four bits in the PBCH payload

Including 3-bit original SSB index bit and 1-bit field indicator bit.

In the payload of PBCH, the lower four bits of the system frame number are

The highest five bits in the PBCH payload are

That is, the highest five bits in the PBCH payload include a 3-bit original SSB index bit, a 1-bit half-frame indicator bit, and a 1-bit system frame number least significant bit.

In a preferred embodiment of the present invention, the method shown in FIG. 1 may further include the following steps: adopt the primary information block payload as the original value of the half-frame indicator bit and the lowest bit of the system frame number in the PBCH payload The idle bit in the indicator.

In this embodiment, because indicating more candidate position indexes will occupy the field indicator bit or the lowest bit of the system frame number in the PBCH load, the original value of the field indicator bit or the lowest bit of the system frame number can be used as the main information block The idle bits in the payload are indicated. In other words, it is necessary to use the Master Information Block (MIB) payload (payload) in the PBCH payload to indicate the information carried by the above occupied bits.

For example, when the field indicator bit and the lowest bit of the system frame number are occupied to indicate the SSB candidate position index, the original values of the field indicator bit and the lowest bit of the system frame number are 0 and 1, respectively. The two original values can be indicated by the idle bits in the MIB.

The embodiment of the present invention can ensure the original function of the PBCH on the basis of satisfying the requirement of indicating more SSB candidate position indexes, thereby ensuring the transmission performance between the base station and the user equipment.

Furthermore, when the highest four bits in the PBCH payload and the sequence of the DMRS are used to indicate the SSB candidate position index, the period of the DRS is greater than 5 milliseconds; the highest five bits in the PBCH payload and the When the DMRS sequence indicates the SSB candidate position index, the period of the DRS is greater than 10 milliseconds.

In a specific application scenario, when the SSB candidate position index requires 7 bits, the original SSb index and the field indicator bit are used to indicate the SSB candidate position index. At this time, the information indicated by the field indicator bit is indicated by the bit in the MIB payload. Since the transmission time interval (TTI) of the MIB payload is 80ms, if the information indicated by the half-frame indicator bit (that is, whether the SSB is in the first half of a frame or the second half of a frame) is placed in the MIB payload, The transmission period of the information indicated by the half-frame indicator bit will also be 80ms, that is, within the time length of 80ms, the information indicated by the half-frame indicator bit remains unchanged, so it is necessary to limit the DRS period to >5ms, such as 10ms, 20ms or 40ms, etc., to ensure that the SSB is always in the first half or the second half of a frame within the time length of 80ms, so that the existing PBCH decoding process may not be affected.

In another specific application scenario, when the SSB candidate position index requires 8 bits, the original SSb index, the field indicator bit, and the lowest bit of the SFN are combined to indicate the SSB candidate position index. At this time, the information indicated by the half-frame indicator bit and the information indicated by the lowest bit of the SFN are indicated by the bits in the MIB payload. As mentioned earlier, the TTI of the MIB payload is 80ms. If the information indicated by the half-frame indicator bit and the information indicated by the lowest bit of SFN are placed in the MIB payload, the information indicated by the half-frame indicator bit and the lowest bit of SFN The transmission period of the indicated information will also be 80ms, that is, within the time length of 80ms, the information indicated by the half-frame indicator bit and the information indicated by the lowest bit of the SFN remain unchanged, so the DRS period needs to be limited to >10ms, such as 20ms Or 40ms, etc., to ensure that the SSB is always in the first half or second half of a frame within the time length of 80ms, and always in the first or second frame of every two frames, so as not to affect the existing PBCH Decoding process.

Further, the idle bits in the payload of the main information block are selected from: part of the idle bits in search space 0 in the physical downlink control channel (Physical Downlink Control Channel, PDCCH) configuration field of the system information block (System Information Block, SIB) 1 Bits, reserved bits, and subcarrier spacing indicate occupied bits.

In specific implementation, the search space 0 in the PDCCH configuration field of the SIB1 in the MIB has idle bits, such as the highest two bits, so it can be used to carry the original value of the half-frame indicator bit and the lowest bit of the system frame number.

In addition, the reserved bits in the MIB can also be used to carry the original value of the half-frame indicator bit and the lowest bit of the system frame number. The bits occupied by the subcarrier interval indicator are also free in the unlicensed high frequency band, so the original value of the indicator half frame indicator bit and the lowest bit of the system frame number can also be used.

In a preferred embodiment of the present invention, the method shown in FIG. 1 may further include the following steps: configuring the original value of the half-frame indicator bit and the lowest bit of the system frame number in the PBCH payload to a fixed value.

Different from the foregoing embodiment, the embodiment of the present invention does not use the idle bit in the main information block payload to indicate the original value of the half-frame indicator bit in the PBCH payload and the lowest bit of the system frame number. , But configure the above original value as a fixed value.

For example, when the half-frame indicator bit in the extra 1-bit PBCH load is occupied, the DRS transmission window is directly fixed and sent in the first half frame; when the extra 2bit half-frame indicator bit and the lowest bit of the system frame number are occupied, the DRS transmission window is directly fixed at The first half of the first frame is sent every 20ms.

The embodiment of the present invention directly configures the original value of the frame indicator bit or the lowest bit of the system frame number to a fixed value. On the one hand, the original function of the PBCH is guaranteed, and on the other hand, it can avoid occupying the payload of the main information block and further ensure the transmission performance.

In a non-limiting embodiment of the present invention, please refer to FIG. 4. Step S103 shown in FIG. 1 may further include the following steps:

Step S401: Determine the number of bits occupied by the newly added index bits according to the number of bits and the number of bits occupied by the original SSB index bits, where the number of bits occupied by the original SSB index bits is 3;

Step S402: Use the 3 bits occupied by the original SSB index bits and the bits occupied by the newly added index bits to indicate the SSB candidate position index.

In this embodiment, in order to indicate more SSB candidate position indexes, a new bit can be directly added to the original SSB index bit of the PBCH payload, that is, a new index bit is added, for example, 3 or 4 bits are added to directly adopt The 3 bits occupied by the original SSB index bit and the bit occupied by the newly added index bit indicate the SSB candidate position index.

If the 3 bits occupied by the DMRS sequence can be used to continue to indicate the SSB candidate position index, then 1 or 2 bits can be added to the original SSB index bits of the PBCH payload to adopt the DMRS sequence, the original SSB index bits and the new index The bits collectively indicate the SSB candidate position index.

Referring to FIG. 5, the method for receiving the SSB candidate position index may be used on the user equipment side, that is, the user equipment may execute the steps shown in FIG. 5.

The method for receiving the SSB candidate position index may include the following steps:

Step S501: Receive an SSB, where the SSB includes the PBCH payload;

Step S502: Determine the maximum number of SSB candidate position indexes that can be sent in the DRS transmission window under the current subcarrier interval;

Step S503: Determine the number of bits occupied by sending the SSB candidate position index according to the maximum number of the SSB candidate position index;

Step S504: Determine the highest P bit in the PBCH payload according to the number of bits, and determine the SSB candidate position index according to the highest P bit in the PBCH payload and the sequence of DMRS, or according to the PBCH load The central plain SSB index bit and the newly added index bit determine the SSB candidate position index, and P is the difference between the number of bits and Q.

Referring to FIG. 6, the SSB candidate position index receiving device 60 may include:

The maximum number determining module 601 is used to determine the maximum number of SSB candidate position indexes that can be sent in the DRS transmission window under the current subcarrier interval;

The bit number determining module 602 is configured to determine the number of bits occupied by sending the SSB candidate position index according to the maximum number of the SSB candidate position index;

The indication module 603 is configured to determine according to the number of bits to use the highest P bit in the PBCH payload and the sequence of DMRS to indicate the SSB candidate position index, or to use the original SSB index bit and the newly added index bit in the PBCH payload to indicate all The SSB candidate position index, wherein the DMRS sequence occupies Q bits, and P is the difference between the number of bits and Q;

The SSB sending module 604 is used to send an SSB, where the SSB includes the PBCH payload.

For more details about the working principle and working mode of the SSB candidate position index receiving device 60, reference may be made to the related descriptions in FIG. 1 to FIG. 4, which will not be repeated here.

Referring to FIG. 7, the SSB candidate position index receiving device 70 may include:

The SSB receiving module 701 is configured to receive SSB, where the SSB includes a PBCH payload;

The maximum number determining module 702 is used to determine the maximum number of SSB candidate position indexes that can be sent in the DRS transmission window under the current subcarrier interval;

The bit number determining module 703 is configured to determine the number of bits occupied by sending the SSB candidate position index according to the maximum number of the SSB candidate position index;

The SSB candidate position index determination module 704 is configured to determine the highest P bit in the PBCH payload according to the number of bits, and determine the SSB candidate position index according to the highest P bit in the PBCH payload and the sequence of DMRS , Or determine the SSB candidate position index according to the original SSB index bit and the newly added index bit in the PBCH load, and P is the difference between the number of bits and Q.

For more details on the working principle and working mode of the SSB candidate position index receiving device 70, reference may be made to the related description in the foregoing embodiment, and details are not repeated here.

The embodiment of the present invention also discloses a storage medium on which computer instructions are stored, and the computer instructions can execute the steps of the methods shown in FIGS. 1 to 4 when the computer instructions are run. The storage medium may include ROM, RAM, magnetic disk or optical disk, etc. The storage medium may also include non-volatile memory (non-volatile) or non-transitory memory, etc.

The embodiment of the present invention also discloses a user equipment. The user equipment may include a memory and a processor, and the memory stores computer instructions that can run on the processor. The processor may execute the steps of the method shown in FIG. 5 when running the computer instructions. The user equipment includes but is not limited to terminal equipment such as mobile phones, computers, and tablets.

The user equipment in the embodiments of the present invention can be any implementable access terminal, user unit, user station, mobile station, mobile station (mobile station, built MS), remote station, remote terminal, mobile device, user terminal, terminal Equipment (terminal equipment), wireless communication equipment, user agent or user device. The user equipment can also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), Handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in the future 5G network or future evolution of the public land mobile network (Public Land Mobile Network, referred to as The terminal equipment in the PLMN) is not limited in the embodiment of the present application.

The base station (base station, BS for short) in the embodiments of the present application may also be referred to as base station equipment, and is a device deployed on a radio access network (RAN) to provide wireless communication functions. For example, the equipment that provides the base station function in the 2G network includes a base transceiver station (English: base transceiver station, referred to as BTS), the equipment that provides the base station function in the 3G network includes the NodeB (NodeB), and the equipment that provides the base station function in the 4G network Including evolved NodeB (eNB), in wireless local area networks (WLAN), the equipment that provides base station function is access point (AP), 5G new radio (New Radio) , Referred to as NR) in the gNB that provides base station functions, and the evolving Node B (ng-eNB), where the gNB and the terminal use NR technology for communication, and the ng-eNB and the terminal use E-UTRA (Evolved Universal Terrestrial Radio Access) technology for communication, both gNB and ng-eNB can be connected to the 5G core network. The base station in the embodiment of the present application also includes equipment that provides base station functions in a new communication system in the future. It should be understood that the term "and/or" in this text is only an association relationship describing associated objects, which means that there can be three types of relationships. For example, A and/or B can mean that A alone exists, and both A and B exist. , There are three cases of B alone. In addition, the character "/" in this text indicates that the associated objects before and after are in an "or" relationship.

The "plurality" in the embodiments of the present application refers to two or more.

It should be understood that, in the embodiment of the present application, the processor may be a central processing unit (central processing unit, CPU for short), and the processor may also be other general-purpose processors or digital signal processors (DSP for short). , Application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.

It should also be understood that the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory may be read-only memory (read-only memory, ROM for short), programmable read-only memory (programmable ROM, PROM for short), erasable PROM (EPROM for short) , Electrically Erasable Programmable Read-Only Memory (EPROM, EEPROM for short) or flash memory. The volatile memory may be a random access memory (random access memory, RAM for short), which is used as an external cache. By way of exemplary but not restrictive description, many forms of random access memory (random access memory, RAM for short) are available, such as static RAM (SRAM), dynamic random access memory (DRAM), and synchronous Dynamic random access memory (synchronous DRAM, referred to as SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, referred to as DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, referred to as ESDRAM), Synchronously connect dynamic random access memory (synchlink DRAM, referred to as SLDRAM) and direct memory bus random access memory (direct rambus RAM, referred to as DR RAM).

The above-mentioned embodiments in this application can be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented by software, the above-mentioned embodiments may be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server or data center via wired or wireless means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more sets of available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium. The semiconductor medium may be a solid state drive.

It should be understood that, in the various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, rather than corresponding to the embodiments of the present application. The implementation process constitutes any limitation.

In the several embodiments provided in this application, it should be understood that the disclosed method, device, and system can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for example, the division of the units is only a logical function division, and there may be other divisions in actual implementation; for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, the functional units in the various embodiments of the present invention may be integrated into one processing unit, or each unit may be separately physically included, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units.

The above-mentioned integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The above-mentioned software function unit is stored in a storage medium, and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device, etc.) to execute part of the steps of the method described in each embodiment of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disks or optical disks, etc., which can store program codes Medium.

Although the present invention is disclosed as above, the present invention is not limited to this. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims.

Claims

An SSB candidate position index indication method, characterized in that it comprises:

Determine the maximum number of SSB candidate position indexes that can be sent in the DRS transmission window under the current subcarrier interval;

Determine the number of bits occupied by sending the SSB candidate position index according to the maximum number of the SSB candidate position index;

It is determined according to the number of bits to use the highest P bit in the PBCH payload and the sequence of the DMRS to indicate the SSB candidate position index, or to use the original SSB index bit and the newly added index bit in the PBCH payload to indicate the SSB candidate position index, Wherein, the sequence of the DMRS occupies Q bits, and P is the difference between the number of bits and Q;

Send an SSB, the SSB including the PBCH payload.
The SSB candidate position index indication method according to claim 1, wherein the determining the maximum number of SSB candidate position indexes that can be sent in the DRS transmission window under the current subcarrier interval comprises:

Determining the length of the DRS transmission window;

Calculating a quantity coefficient under the current subcarrier interval, where the quantity coefficient is the number of time units included in the time unit used by the DRS transmission window;

The maximum number of SSB candidate position indexes is determined according to the length of the DRS transmission window, wherein the maximum number M of the SSB candidate position indexes is the length of the DRS transmission window and the SSB contained in the time unit The product of the quantity and the coefficient of the quantity.
The method for indicating an SSB candidate position index according to claim 1, wherein the determining according to the number of bits to use the highest P bit in the PBCH payload and a sequence of DMRS to indicate the SSB candidate position index comprises:

If the number of bits is Q+4, the highest four bits in the PBCH payload and the sequence of the DMRS are used to indicate the SSB candidate position index;

If the number of bits is Q+5, the highest five bits in the PBCH payload and the sequence of the DMRS are used to indicate the SSB candidate position index.
The SSB candidate position index indication method of claim 3, wherein the highest four bits in the PBCH payload include the original SSB index bit and the half-frame indicator bit; the highest five bits in the PBCH payload include The original SSB index bit, field indicator bit and the lowest bit of the system frame number.
The SSB candidate position index indication method according to claim 4, further comprising:

The original values of the half-frame indicator bits in the PBCH payload and the lowest bit of the system frame number are indicated by idle bits in the main information block payload.
The SSB candidate position index indication method according to claim 5, wherein the idle bits in the payload of the main information block are selected from: part of the idle bits in the search space 0 in the physical downlink control channel configuration field of the system information block 1. Bits, reserved bits, and subcarrier spacing indicate occupied bits.
The SSB candidate position index indication method according to claim 4, further comprising:

The original value of the half-frame indicator bit and the lowest bit of the system frame number in the PBCH payload is configured to be fixed values.
The SSB candidate position index indication method according to claim 4, wherein when the highest four bits in the PBCH payload and the sequence of the DMRS are used to indicate the SSB candidate position index, the period of the DRS is greater than 5 millisecond;

When the highest five bits in the PBCH payload and the sequence of the DMRS are used to indicate the SSB candidate position index, the period of the DRS is greater than 10 milliseconds.
The SSB candidate position index indication method according to claim 1, wherein the determining according to the number of bits to use the original SSB index bit and the newly added index bit in the PBCH load to indicate the SSB candidate position index comprises:

Determine the number of bits occupied by the newly added index bit according to the number of bits and the number of bits occupied by the original SSB index bit, where the number of bits occupied by the original SSB index bit is 3;

The 3 bits occupied by the original SSB index bits and the bits occupied by the newly added index bits are used to indicate the SSB candidate position index, or the 3 bits occupied by the original SSB index bits and the newly added index bits are used The occupied bits and the sequence of the DMRS indicate the SSB candidate position index.
A method for receiving SSB candidate position index, which is characterized in that it includes:

Receiving the SSB, the SSB including the PBCH payload;

Determine the maximum number of SSB candidate position indexes that can be sent in the DRS transmission window under the current subcarrier interval;

Determine the number of bits occupied by sending the SSB candidate position index according to the maximum number of the SSB candidate position index;

Determine the highest P bit in the PBCH payload according to the number of bits, and determine the SSB candidate position index according to the highest P bit in the PBCH payload and the sequence of DMRS, or according to the original SSB index in the PBCH payload Bits and newly added index bits determine the SSB candidate position index, the DMRS sequence occupies Q bits, and P is the difference between the number of bits and Q.
An SSB candidate position index indicating device, characterized in that it comprises:

The maximum number determining module is used to determine the maximum number of SSB candidate position indexes that can be sent in the DRS transmission window under the current subcarrier interval;

A bit number determining module, configured to determine the number of bits occupied by sending the SSB candidate position index according to the maximum number of the SSB candidate position index;

The indication module is configured to determine according to the number of bits to use the highest P bit in the PBCH payload and the sequence of DMRS to indicate the SSB candidate position index, or to use the original SSB index bit and the newly added index bit in the PBCH payload to indicate the SSB candidate position index, where the DMRS sequence occupies Q bits, and P is the difference between the number of bits and Q;

The SSB sending module is used to send an SSB, where the SSB includes the PBCH payload.
An SSB candidate position index receiving device, characterized in that it comprises:

The SSB receiving module is used to receive SSB, where the SSB includes the PBCH payload;

The maximum number determining module is used to determine the maximum number of SSB candidate position indexes that can be sent in the DRS transmission window under the current subcarrier interval;

A bit number determining module, configured to determine the number of bits occupied by sending the SSB candidate position index according to the maximum number of the SSB candidate position index;

The SSB candidate position index determination module is configured to determine the highest P bit in the PBCH payload according to the number of bits, and determine the SSB candidate position index according to the highest P bit in the PBCH payload and the sequence of DMRS, Or the SSB candidate position index is determined according to the original SSB index bit and the newly added index bit in the PBCH load, the sequence of the DMRS occupies Q bits, and P is the difference between the number of bits and Q.
A storage medium having computer instructions stored thereon, wherein the computer instructions execute the steps of the SSB candidate position index indication method of any one of claims 1 to 9 when the computer instructions are executed, or execute the method described in claim 10 The steps of the SSB candidate location index receiving method.
A base station, comprising a memory and a processor, the memory stores computer instructions that can run on the processor, wherein the processor executes any of claims 1 to 9 when the computer instructions are executed. One of the steps of the SSB candidate position index indication method.
A user equipment, comprising a memory and a processor, the memory stores computer instructions that can be run on the processor, wherein the processor executes the computer instructions described in claim 10 when the computer instructions are executed. SSB candidate position index receiving method steps.