CN110336655B - SSB candidate position index indication and receiving method and device, storage medium, base station and user equipment - Google Patents
SSB candidate position index indication and receiving method and device, storage medium, base station and user equipment Download PDFInfo
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- CN110336655B CN110336655B CN201910734567.4A CN201910734567A CN110336655B CN 110336655 B CN110336655 B CN 110336655B CN 201910734567 A CN201910734567 A CN 201910734567A CN 110336655 B CN110336655 B CN 110336655B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
- H04L5/0094—Indication of how sub-channels of the path are allocated
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
Abstract
An SSB candidate position index indication method, a receiving method and a device, a storage medium, a base station and user equipment are provided, wherein the SSB candidate position index indication method comprises the following steps: determining the maximum number of SSB candidate position indexes which can be sent in a DRS transmission window under the current subcarrier interval; determining the bit number occupied by sending the SSB candidate position index according to the maximum number of the SSB candidate position indexes; determining to use the highest P bit in a PBCH effective load and a sequence of DMRS to indicate an SSB candidate position index according to the bit number, or to use the original SSB index bit and a newly added index bit in the PBCH load to indicate the SSB candidate position index, wherein the sequence of DMRS occupies Q bits, and P is the difference value between the bit number and Q; sending an SSB, the SSB comprising the PBCH payload. The technical scheme of the invention can indicate the SSB candidate position index in the unauthorized frequency band higher than 6 GHz.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an SSB candidate location index indication method, an SSB candidate location index reception device, a storage medium, a base station, and a user equipment.
Background
In a 3rd Generation Partnership Project (3 GPP) New Radio (NR) system, each Radio frame is divided into 10 equally sized subframes of 1ms length in 10ms time domain, and each subframe may include a plurality of slots (slots) according to a subcarrier spacing. Each slot is formed of a certain number of symbols, and the number of symbols is determined by a Cyclic Prefix (CP) type. The NR system supports multi-beam Synchronization Signal (SS), secondary synchronization Signal, and Physical Broadcast Channel (PBCH) transmission. A Synchronization Signal Block (SSB) (which may also be referred to as SS/PBCH block) typically occupies 4OFDM symbols, whose position within the search window is related to Sub-Carrier Space (SCS) and the number of beams L. The SSBs form an SSB set, and the maximum number of SSBs that can be transmitted in the SSB set is denoted as Lmax. Lmax is 4 in the frequency band below 3GHz, Lmax is 8 in the frequency band below 5GHz, and Lmax is 64 in the frequency band above 5 GHz.
The PBCH payload (payload) contains 2 parts, one of which is a Master information block (Master)Information Block, MIB) payload, of 24 bits (bit) in total; the other part is 8 bits, and comprises 4 lower bits of System Frame Number (SFN) with 4 bits
1bit field indication
3bit
The SSB candidate location index of. The information of the MIB payload includes a system frame number, a subcarrier interval, an SSB subcarrier offset, a Demodulation Reference Signal (DMRS) type a (type a) position, a SIB1 Physical Downlink Control Channel (PDCCH) configuration, whether a cell is forbidden, common frequency reselection, and 1bit reservation. And the SIB1PDCCH configuration contains two parts of information: information of control resource set 0 and search space 0.
The 3GPP NR-U (unlicensed) technology is to study how to apply an NR system in an unlicensed band, wherein since an unlicensed cell discontinuously transmits, a Discovery Reference Signal (DRS) needs to be designed to perform functions of cell identification, synchronization, and Radio Resource Management (RRM) measurement, an unlicensed band below 6GHz is designed in the NR-U, and a maximum length of a DRS transmission window (transmission window) is 5 ms. Multiple SSB candidate locations may be transmitted within one discovery reference signal window and may be more than the Lmax value within the licensed spectrum. If the subcarrier spacing is 15kHz, 10 candidate positions exist; there are 20 candidate positions in 30 kHz. The SSB candidate position indexes are jointly indicated by 8 sequences of PBCH DMRS and 1bit or 2bit in the original 3-bit SSB candidate position index of the PBCH payload.
However, in unlicensed bands above 6GHz, the NR-U has not determined the length of the DRS transmission window and how to indicate the SSB candidate location index.
Disclosure of Invention
The technical problem solved by the invention is how to indicate the SSB candidate position index in the unlicensed frequency band higher than 6 GHz.
To solve the foregoing technical problem, an embodiment of the present invention provides an SSB candidate location index indicating method, where the SSB candidate location index indicating method includes: determining the maximum number of SSB candidate position indexes which can be sent in a DRS transmission window under the current subcarrier interval; determining the bit number occupied by sending the SSB candidate position index according to the maximum number of the SSB candidate position indexes; determining to use the highest P bit in a PBCH effective load and a sequence of DMRS to indicate an SSB candidate position index according to the bit number, or to use the original SSB index bit and a newly added index bit in the PBCH load to indicate the SSB candidate position index, wherein the sequence of DMRS occupies Q bits, and P is the difference value between the bit number and Q; sending an SSB, the SSB comprising the PBCH payload.
Optionally, the determining the maximum number of SSB candidate position indexes that can be sent in the DRS transmission window in the current subcarrier spacing includes: determining a length of the DRS transmission window; calculating a quantity coefficient under the current subcarrier interval, wherein the quantity coefficient is the quantity of time units contained in a time unit used by the DRS transmission window; and determining the maximum number of the SSB candidate position indexes according to the length of the DRS transmission window, wherein the maximum number M of the SSB candidate position indexes 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 indicate the SSB candidate position index by using the highest P bit in the PBCH payload and the sequence of the DMRS includes: if the bit number is Q +4, indicating the SSB candidate position index by adopting the highest four bits in a PBCH effective load and the sequence of the DMRS; if the number of bits is Q +5, indicating the SSB candidate position index by using the highest five bits in PBCH payload and the sequence of the DMRS.
Optionally, the highest four bits in the PBCH payload include an original SSB index bit and a half frame indicator bit; the top five bits of the PBCH payload comprise the original SSB index bit, the half-frame indication bit and the lowest bit of the system frame number.
Optionally, the SSB candidate location index indication method further includes: indicating the original values of the field indication bits and the lowest bits of the system frame number in the PBCH payload with idle bits in a Master information Block payload.
Optionally, the idle bits in the payload of the master information block are selected from: and searching partial idle bits, reserved bits and bits occupied by subcarrier spacing indication of space 0 in a physical downlink control channel configuration field of the system information block 1.
Optionally, the SSB candidate location index indication method further includes: configuring the original values of the field indication bits and the lowest bits of the system frame number in the PBCH payload as fixed values.
Optionally, when the SSB candidate location index is indicated by using the highest four bits in a PBCH payload and the sequence of the DMRS, the period of the DRS is greater than 5 milliseconds; when the SSB candidate position index is indicated by adopting the highest five bits in PBCH payload and the sequence of the DMRS, the period of the DRS is more than 10 milliseconds.
Optionally, the determining, according to the number of bits, to indicate the SSB candidate position index by using the original SSB index bit and the newly added index bit in the PBCH load includes: determining 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, wherein the number of bits occupied by the original SSB index bits is 3; and indicating the SSB candidate position index by adopting 3 bits occupied by the original SSB index bit and the bit occupied by the newly added index bit.
In order to solve the above technical problem, an embodiment of the present invention further discloses an SSB candidate position index receiving method, where the SSB candidate position index receiving method includes: receiving an SSB, the SSB comprising a PBCH payload; determining the maximum number of SSB candidate position indexes which can be sent in a DRS transmission window under the current subcarrier interval; determining the bit number occupied by sending the SSB candidate position index according to the maximum number of the SSB candidate position indexes; and determining the highest P bit in the PBCH effective load according to the bit number, and determining the SSB candidate position index according to the highest P bit in the PBCH effective load and the sequence of the DMRS, or determining the SSB candidate position index according to the original SSB index bit and the newly added index bit in the PBCH effective load, wherein P is the difference value between the bit number and Q.
In order to solve the above technical problem, an embodiment of the present invention further discloses an SSB candidate location index indicating device, where the SSB candidate location index indicating device includes: a maximum number determining module, configured to determine a maximum number of SSB candidate position indexes that can be sent in a DRS transmission window at a current subcarrier interval; a bit number determining module, configured to determine, according to the maximum number of the SSB candidate position indexes, a bit number occupied by sending the SSB candidate position indexes; an indicating module, configured to determine, according to the bit number, to indicate an SSB candidate position index by using a highest P bit in a PBCH payload and a sequence of a DMRS, or to indicate the SSB candidate position index by using an original SSB index bit and a newly added index bit in the PBCH payload, where the sequence of the DMRS occupies Q bits, and P is a difference between the bit number and Q; an SSB sending module, configured to send an SSB, where the SSB includes the PBCH payload.
The embodiment of the invention also discloses an SSB candidate position index receiving device, which comprises: an SSB receiving module configured to receive an SSB, the SSB including a PBCH payload; a maximum number determining module, configured to determine a maximum number of SSB candidate position indexes that can be sent in a DRS transmission window at a current subcarrier interval; a bit number determining module, configured to determine, according to the maximum number of the SSB candidate position indexes, a bit number occupied by sending the SSB candidate position indexes; and the SSB candidate position index determining module is used for determining the highest P bit in the PBCH effective load according to the bit number, determining the SSB candidate position index according to the highest P bit in the PBCH effective load and the sequence of the DMRS, or determining the SSB candidate position index according to the original SSB index bit and the newly added index bit in the PBCH load, wherein P is the difference value between the bit number and Q.
The embodiment of the invention also discloses a storage medium, wherein a computer instruction is stored on the storage medium, and when the computer instruction runs, the step of the SSB candidate position index indication method is executed, or the step of the SSB candidate position index receiving method is executed.
The embodiment of the invention also discloses a base station, which comprises a memory and a processor, wherein the memory is stored with a computer instruction capable of running on the processor, and the processor executes the step of the SSB candidate position index indication method when running the computer instruction.
The embodiment of the invention also discloses user equipment which comprises a memory and a processor, wherein the memory is stored with a computer instruction which can be operated on the processor, and the processor executes the step of the SSB candidate position index receiving method when operating the computer instruction.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
in the technical scheme of the invention, the bit number occupied for sending the SSB candidate position index can be determined by determining the maximum number of the SSB candidate position indexes which can be sent in a DRS transmission window under the current subcarrier interval, the SSB candidate position index is indicated by adopting the highest P bit in a PBCH effective load and a sequence of DMRS according to the bit number, or the SSB candidate position index is indicated by adopting the original SSB index bit and the newly added index bit in the PBCH load. According to the technical scheme, the index bit is directly added in the PBCH, and the newly added index bit and the original SSB index bit are combined to jointly indicate the SSB candidate position index, so that the requirement that more SSB candidate position indexes need to be indicated in an unauthorized frequency band higher than 6GHz can be met; in addition, the SSB candidate position indexes can be indicated together by using the highest P bit in the PBCH payload and the sequence of the DMRS, and on the basis of satisfying the requirement of indicating more SSB candidate position indexes, the load of the PBCH can be prevented from being increased, thereby preventing the transmission performance of the PBCH from being affected.
Further, the highest four bits in the PBCH payload include the original SSB index bits and the field indication bits; the top five bits of the PBCH payload comprise the original SSB index bit, the half-frame indication bit and the lowest bit of the system frame number. Indicating the original values of the field indication bits and the lowest bits of the system frame number in the PBCH payload with idle bits in a Master information Block payload. In the technical scheme of the invention, as more candidate position indexes are indicated to occupy the field indication bit or the lowest bit of the system frame number in the PBCH load, the original value of the field indication bit or the lowest bit of the system frame number can be indicated by using the idle bit in the effective load of the main information block, so that the original function of the PBCH can be ensured on the basis of meeting the requirement of indicating more SSB candidate position indexes, and the transmission performance between the base station and the user equipment is further ensured.
Further, the original values of the field indication bits and the lowest bits of the system frame number in the PBCH payload are configured to be fixed values. In the technical scheme of the invention, as more candidate position indexes are indicated to occupy the field indication bit or the lowest bit of the system frame number in the PBCH load, the original function of the PBCH is ensured on the one hand, and the occupation of the effective load of the main information block can be avoided on the other hand by directly configuring the original value of the frame indication bit or the lowest bit of the system frame number as a fixed value, thereby further ensuring the transmission performance.
Drawings
FIG. 1 is a flowchart of a method for indicating an SSB candidate location index according to an embodiment of the present invention;
FIG. 2 is a flowchart of one embodiment of step S101 shown in FIG. 1;
FIG. 3 is a flowchart of one embodiment of step S103 shown in FIG. 1;
FIG. 4 is a flowchart of another embodiment of step S103 shown in FIG. 1;
fig. 5 is a flowchart of an SSB candidate position index receiving method according to an embodiment of the present invention;
FIG. 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 SSB candidate location index receiving apparatus according to an embodiment of the present invention.
Detailed Description
As described in the background, in unlicensed bands above 6GHz, the NR-U has not determined the length of the DRS transmission window and how to indicate the SSB candidate location index.
The inventor of the application finds that if a DRS transmission window with the length of 5ms is still used in an NR-U frequency band above 5GHz, and the subcarrier interval is 60kHz, at most 40 SSB candidate position indexes need to be sent, and at most 6 bits are needed; when the subcarrier interval is 120KHz, 80 SSB candidate position indexes are required to be sent at most, and 7 bits are required at most; when the subcarrier interval is 240KHz, 160 SSB candidate position indexes need to be transmitted at most, and 8 bits need to be transmitted at most. But PBCH DMRS and SSB candidate position index in PBCH payload are 6bit at most.
In the technical scheme of the invention, as more candidate position indexes are indicated to occupy the field indication bit or the lowest bit of the system frame number in the PBCH load, the original value of the field indication bit or the lowest bit of the system frame number can be indicated by using the idle bit in the effective load of the main information block, so that the original function of the PBCH can be ensured on the basis of meeting the requirement of indicating more SSB candidate position indexes, and the transmission performance between the base station and the user equipment is further ensured.
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 an SSB candidate location index indication method according to an embodiment of the present invention.
The SSB candidate location index indication method may be performed by a network side device, for example, the base station may perform the steps shown in fig. 1.
The SSB candidate location index indication method may specifically include the following steps:
step S101: determining the maximum number of SSB candidate position indexes which can be sent in a DRS transmission window under the current subcarrier interval;
step S102: determining the bit number occupied by sending the SSB candidate position index according to the maximum number of the SSB candidate position indexes;
step S103: determining to use the highest P bit in a PBCH effective load and a sequence of DMRS to indicate an SSB candidate position index according to the bit number, or to use the original SSB index bit and a newly added index bit in the PBCH load to indicate the SSB candidate position index, wherein the sequence of DMRS occupies Q bits, and P is the difference value between the bit number and Q;
step S104: sending an SSB, the SSB comprising the PBCH payload.
It should be noted that the sequence numbers of the steps in this embodiment do not represent a limitation on the execution sequence of the steps.
In a specific implementation of step S101, in an unlicensed frequency band higher than 6GHz, the maximum number of SSB candidate position indexes that can be transmitted in the DRS transmission window in the current subcarrier spacing may be determined. The maximum number is positively correlated with the size of the current subcarrier spacing and the time length of the DRS transmission window.
The SSB candidate location index may indicate the location of the SSB in the time domain, e.g., may indicate which slot the SSB is located in.
For example, the length of the DRS transmission window still follows 5ms in the prior art, and when the current subcarrier spacing is 60kHz, the maximum number of SSB candidate position indexes may be 80; the length of the DRS transmission window still follows 5ms in the prior art, and the maximum number of SSB candidate position indices may be 160 when the current subcarrier spacing is 120 kHz.
In an embodiment of the present invention, referring to fig. 2, step S101 shown in fig. 1 may include the following steps:
step S201: determining a length of the DRS transmission window;
step S202: calculating a quantity coefficient under the current subcarrier interval, wherein the quantity coefficient is the quantity of time units contained in a time unit used by the DRS transmission window;
step S203: and determining the maximum number of the SSB candidate position indexes according to the length of the DRS transmission window, wherein the maximum number M of the SSB candidate position indexes is the product of the length of the DRS transmission window, the number of SSBs contained in the time unit and the number coefficient.
In a specific implementation of step S201, the unit of the length of the DRS transmission window may be a unit of time, for example, milliseconds. Specifically, the length of the DRS transmission window may be determined to be N milliseconds.
In the unlicensed band above 6GHz, the length of the DRS transmission window may be 5ms as in the prior art. In the prior art, when the length of the DRS transmission window is 5ms and the subcarrier spacing is 15kHz, 10 SSB candidate position indexes may be provided. As the subcarrier spacing increases, the number of slots increases and the candidate position indices that can be provided also increases. The number coefficient is the number of time units included in a time unit used by the DRS transmission window, where the time unit may be a frame (e.g., 1ms), and the time unit may be a slot. The number coefficient at the current subcarrier spacing may be obtained by calculating the current subcarrier spacing to a multiple of 15kHz from the subcarrier spacing.
That is, in step S202, the number coefficient S is calculated to be R/15, where R is the current subcarrier spacing.
It should be understood by those skilled in the art that in the NR system, the time length of the time slot may be different according to the subcarrier spacing, for example, may be 0.5ms, 0.2ms, and the like, and the embodiment of the present invention is not limited thereto.
Further in step S203, a maximum number M of SSB candidate position indices is calculated, where M is 2 × N × S, where 2 denotes the number of SSBs accommodated in the time unit, that is, the number of SSBs accommodated in a single slot is 2.
It should be noted that the length of the DRS transmission window may also be any other implementable value, for example, when the subcarrier spacing is 240kHz, the length of the DRS transmission window may be reduced, and when 80 candidate position indexes need to be provided, the time length of the DRS transmission window may be 2.5 ms; when 128 candidate position indices need to be provided, the time length of the DRS transmission window may be 4 ms.
With continued reference to FIG. 1, in a specific implementation of step S102, the location may be indexed according to SSB candidate locationsThe maximum number determines the number of bits occupied by transmitting the SSB candidate position index. That is, the number of SSB candidate position indexes that can be indicated by the number of bits is equal to or greater than the maximum number. Such as maximum number<＝2TWhere T is the number of bits, 2TThe number of SSB candidate position indexes that can be indicated when the number of bits is T is represented.
For example, when the maximum number M is 80, the number of bits T to be occupied may be 7; the maximum number M is 160, the number of bits T to be occupied may be 8.
As described in the background art, the PBCH DMRS and the SSB candidate position index in the PBCH payload in the prior art are 6 bits at most, but the number of bits T to be occupied determined in step S102 may be greater than 6, for example, 7 bits or 8 bits. Therefore, in the specific implementation of step S103, the SSB candidate position index may be indicated by using the highest P bit in the PBCH payload and the DMRS sequence, or may be indicated by using the original SSB index bit and the newly added index bit in the PBCH payload.
Specifically, the sequence of the DMRS occupies Q bits, and the value of Q may be 3.
The embodiment of the invention can meet the requirement that more SSB candidate position indexes need to be indicated in the unauthorized frequency band higher than 6GHz by directly adding the index bit in the PBCH and combining the newly added index bit and the original SSB index bit to jointly indicate the SSB candidate position indexes; in addition, the SSB candidate position indexes can be indicated together by using the highest P bit in the PBCH payload and the sequence of the DMRS, and on the basis of satisfying the requirement of indicating more SSB candidate position indexes, the load of the PBCH can be prevented from being increased, thereby preventing the transmission performance of the PBCH from being affected.
In a non-limiting embodiment of the present invention, referring to fig. 3, step S103 shown in fig. 1 may include the following steps:
step S301: if the bit number is Q +4, indicating the SSB candidate position index by adopting the highest four bits in a PBCH effective load and the sequence of the DMRS;
step S302: if the number of bits is Q +5, indicating the SSB candidate position index by using the highest five bits in PBCH payload and the sequence of the DMRS.
It should be noted that one of the steps S301 and S302 may be selectively executed according to the actual application scenario.
In a specific implementation, the number of sequences of the DMRS is 8, and 3 bits are occupied. If the number of bits occupied by transmitting the SSB candidate position index is 7 and four bits are required in addition to 3 bits occupied by the sequence of the DMRS, the highest four bits in the PBCH payload may be used. E.g. sequences incorporating DMRS and in PBCH payload
Collectively indicating the SSB candidate location index.
Similarly, if the number of bits occupied by sending the SSB candidate position index is 8, five bits are required in addition to 3 bits occupied by the DMRS sequence, and the highest five bits in the PBCH payload may be used. E.g. sequences incorporating DMRS and in PBCH payload
Collectively indicating the SSB candidate location index.
Further, the highest four bits in the PBCH payload include the original SSB index bits and the field indication bits; the top five bits of the PBCH payload comprise the original SSB index bit, the half-frame indication bit and the lowest bit of the system frame number.
As mentioned above, in PBCH payload, the original SSB index bits occupy 3 bits, i.e. the original SSB index bits occupy
The field indicator bit is
The highest four bits in the PBCH payload
Including 3 bits of bitsSSB index bits and 1-bit field indication bits.
In the payload of PBCH, the four lower bits of the system frame number are
The top five bits of the PBCH payload are
That is, the top five bits in the PBCH payload include the original SSB index bit of 3 bits, the field indicator bit of 1bit, and the lowest bit of the system frame number of 1 bit.
In a preferred embodiment of the present invention, the method shown in fig. 1 may further include the steps of: indicating the original values of the field indication bits and the lowest bits of the system frame number in the PBCH payload with idle bits in a Master information Block payload.
In this embodiment, since the index indicating more candidate positions occupies the lowest bit of the field indicator bit or the system frame number in the PBCH payload, the original value of the lowest bit of the field indicator bit or the system frame number may be indicated by using the idle bit in the main information block payload. That is, a Master Information Block (MIB) payload (payload) in the PBCH payload needs to be used to indicate the Information carried by the occupied bits.
For example, if the least significant bits of the field indication bit and the system frame number are occupied to indicate the SSB candidate position index, the original values of the field indication bit and the least significant bits of the system frame number are 0 and 1, respectively, and these two original values can be indicated by idle bits placed in the MIB.
The embodiment of the invention can ensure the original function of PBCH on the basis of meeting the requirement of indicating more SSB candidate position indexes, thereby ensuring the transmission performance between the base station and the user equipment.
Further, when the SSB candidate location index is indicated using the highest four bits in a PBCH payload and the sequence of the DMRS, the periodicity of the DRS is greater than 5 milliseconds; when the SSB candidate position index is indicated by adopting the highest five bits in PBCH payload and the sequence of the DMRS, the period of the DRS is more than 10 milliseconds.
In a specific application scenario, when the SSB candidate position index needs 7 bits, the original SSB index is combined with the field indicating bit to indicate the SSB candidate position index, and at this time, information indicated by the field indicating bit is indicated by using a bit in the MIB payload. Since the Transmission Time Interval (TTI) of the MIB payload is 80ms, and if the information indicated by the field indicator (i.e., the SSB is in the first field or the second field of a frame) is placed in the MIB payload, the Transmission period of the information indicated by the field indicator will also be 80ms, i.e., the information indicated by the field indicator is not changed in the Time length of 80ms, so that the DRS period needs to be limited to >5ms, for example, 10ms, 20ms, or 40ms, to ensure that the SSB is always in the first field or the second field of a frame in the Time length of 80ms, thereby not affecting the existing PBCH decoding process.
In another specific application scenario, when the SSB candidate position index needs 8 bits, the SSB candidate position index is indicated by the combination of the original SSB index, the half-frame indicator bit, and the lowest bit of the SFN. At this time, the information indicated by the field indicating bit and the information indicated by the lowest bits of the SFN are indicated by using bits in the MIB payload. As mentioned above, if the TTI of the MIB payload is 80ms and the information indicated by the field indicator bit and the information indicated by the lowest SFN bit are placed in the MIB payload, the transmission period of the information indicated by the field indicator bit and the information indicated by the lowest SFN bit will also be 80ms, that is, the information indicated by the field indicator bit and the information indicated by the lowest SFN bit are not changed within the time length of 80ms, so that it is necessary to limit the DRS period to >10ms, for example, 20ms or 40ms, to ensure that the PBCH is always located in the first half frame or the second half frame of one frame and always located in the first frame or the second frame of every two frames within the time length of 80ms, so as not to affect the existing PBCH decoding process.
Further, the spare bits in the master information block payload are selected from: a partial idle bit, a reserved bit, and a bit occupied by a subcarrier spacing indicator of a search space 0 in a Physical Downlink Control Channel (PDCCH) configuration field of a System Information Block (SIB) 1.
In one embodiment, the search space 0 in the PDCCH configuration field of SIB1 in MIB has idle bits, e.g. the most significant 2 bits, and therefore can be used to carry the original values of the field indication bits and the least significant bits of the system frame number.
In addition, reserved bits in the MIB can also be used to carry the original values of the field indication bits and the lowest bits of the system frame number. The sub-carrier spacing indicates that the occupied bits are also free in the unlicensed high band, so the original values indicating the field indication bits and the lowest bits of the system frame number may also be used.
In a preferred embodiment of the present invention, the method shown in fig. 1 may further include the steps of: configuring the original values of the field indication bits and the lowest bits of the system frame number in the PBCH payload as fixed values.
Unlike the previous embodiments, the original values of the field indication bits and the lowest bits of the system frame number in the PBCH payload are not indicated by the idle bits in the master information block payload, but are configured as fixed values.
For example, when occupying the field indicator bit in the PBCH load of the extra 1bit, the DRS transmission window is directly fixed and transmitted in the first field; when the field indicating bit occupying the extra 2 bits and the lowest bit of the system frame number are occupied, directly fixing a DRS transmission window to transmit in the first field of the first frame of every 20 ms.
The embodiment of the invention directly configures the original value of the frame indicator bit or the lowest bit of the system frame number as a fixed value, thereby ensuring the original function of PBCH on one hand, avoiding occupying the effective load of the main information block on the other hand and further ensuring the transmission performance.
In a non-limiting embodiment of the present invention, referring to fig. 4, step S103 shown in fig. 1 may further include the following steps:
step S401: determining 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, wherein the number of bits occupied by the original SSB index bits is 3;
step S402: and indicating the SSB candidate position index by adopting 3 bits occupied by the original SSB index bit and the bit occupied by the newly added index bit.
In this embodiment, in order to indicate more SSB candidate position indexes, new bits, that is, new added index bits, for example, 3 bits or 4 bits, may be directly added to original SSB index bits of a PBCH payload, so as to directly indicate the SSB candidate position indexes by using the 3 bits occupied by the original SSB index bits and the bits occupied by the new added index bits.
If the SSB candidate position index can be continuously indicated by using 3 bits occupied by the sequence of the DMRS, 1bit or 2 bits may be added to the original SSB index bit of the PBCH payload to indicate the SSB candidate position index by using the sequence of the DMRS, the original SSB index bit, and the newly added index bit.
Referring to fig. 5, the SSB candidate position index receiving method may be applied to a user equipment side, that is, the user equipment may perform the steps shown in fig. 5.
The SSB candidate location index receiving method may include the steps of:
step S501: receiving an SSB, the SSB comprising a PBCH payload;
step S502: determining the maximum number of SSB candidate position indexes which can be sent in a DRS transmission window under the current subcarrier interval;
step S503: determining the bit number occupied by sending the SSB candidate position index according to the maximum number of the SSB candidate position indexes;
step S504: and determining the highest P bit in the PBCH effective load according to the bit number, and determining the SSB candidate position index according to the highest P bit in the PBCH effective load and the sequence of the DMRS, or determining the SSB candidate position index according to the original SSB index bit and the newly added index bit in the PBCH effective load, wherein P is the difference value between the bit number and Q.
The embodiment of the invention can meet the requirement that more SSB candidate position indexes need to be indicated in the unauthorized frequency band higher than 6GHz by directly adding the index bit in the PBCH and combining the newly added index bit and the original SSB index bit to jointly indicate the SSB candidate position indexes; in addition, the SSB candidate position indexes can be indicated together by using the highest P bit in the PBCH payload and the sequence of the DMRS, and on the basis of satisfying the requirement of indicating more SSB candidate position indexes, the load of the PBCH can be prevented from being increased, thereby preventing the transmission performance of the PBCH from being affected.
Referring to fig. 6, the SSB candidate location index receiving apparatus 60 may include:
a maximum number determining module 601, configured to determine a maximum number of SSB candidate position indexes that can be sent in a DRS transmission window at a current subcarrier interval;
a bit number determining module 602, configured to determine, according to the maximum number of the SSB candidate position indexes, a bit number occupied by sending the SSB candidate position indexes;
an indicating module 603, configured to determine, according to the bit number, to indicate an SSB candidate position index by using a highest P bit in a PBCH payload and a sequence of a DMRS, or to indicate the SSB candidate position index by using an original SSB index bit and a newly added index bit in the PBCH payload, where the sequence of the DMRS occupies Q bits, and P is a difference between the bit number and Q;
an SSB sending module 604, configured to send an SSB, where the SSB includes the PBCH payload.
For more details of the operation principle and the operation mode of the SSB candidate location index receiving apparatus 60, reference may be made to the relevant descriptions in fig. 1 to fig. 4, which are not repeated herein.
Referring to fig. 7, the SSB candidate location index receiving apparatus 70 may include:
an SSB receiving module 701, configured to receive an SSB, where the SSB includes a PBCH payload;
a maximum number determining module 702, configured to determine a maximum number of SSB candidate position indexes that can be sent in a DRS transmission window at a current subcarrier interval;
a bit number determining module 703, configured to determine, according to the maximum number of the SSB candidate position indexes, the bit number occupied by sending the SSB candidate position index;
an SSB candidate position index determining module 704, configured to determine the highest P bit in the PBCH payload according to the bit number, and determine the SSB candidate position index according to the highest P bit in the PBCH payload and the sequence of the DMRS, or determine the SSB candidate position index according to the original SSB index bit and the newly added index bit in the PBCH payload, where P is a difference between the bit number and Q.
For more details of the operation principle and operation manner of the SSB candidate location index receiving apparatus 70, reference may be made to the related description in the foregoing embodiments, and details are not repeated here.
The embodiment of the invention also discloses a storage medium, wherein computer instructions are stored on the storage medium, and when the computer instructions are operated, the steps of the method shown in the figures 1 to 4 can be executed. The storage medium may include ROM, RAM, magnetic or optical disks, etc. The storage medium may further include a non-volatile memory (non-volatile) or a non-transitory memory (non-transient), and the like.
The embodiment of the invention also discloses user equipment which can comprise a memory and a processor, wherein the memory is stored with computer instructions capable of running on the processor. The processor, when executing the computer instructions, may perform the steps of the method shown in fig. 5. The user equipment includes but is not limited to a mobile phone, a computer, a tablet computer and other terminal equipment.
The ue in the embodiments of the present invention may be any implementable access terminal, subscriber unit, subscriber station, mobile station (mobile station, MS), remote station, remote terminal, mobile device, user terminal, terminal device (terminal equipment), wireless communication device, user agent, or user equipment. The user equipment may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with a Wireless communication function, a computing device or other processing devices connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G Network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which is not limited in this embodiment.
A Base Station (BS) in the embodiment of the present application, which may also be referred to as a base station device, is a device deployed in a Radio Access Network (RAN) to provide a wireless communication function. For example, a device providing a base station function in a 2G network includes a Base Transceiver Station (BTS), a device providing a base station function in a 3G network includes a node b (nodeb), apparatuses for providing a base station function in a 4G network include evolved node bs (enbs), which, in a Wireless Local Area Network (WLAN), the devices providing the base station function are an Access Point (AP), a device gNB providing the base station function in a New Radio (NR) of 5G, and a node B (ng-eNB) continuing to evolve, the gNB and the terminal communicate with each other by adopting an NR (NR) technology, the ng-eNB and the terminal communicate with each other by adopting an E-UTRA (evolved Universal Terrestrial Radio Access) technology, and both the gNB and the ng-eNB can be connected to a 5G core network. The base station in the embodiment of the present application also includes a device and the like that provide a function of the base station in a future new communication system. It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this document indicates that the former and latter related objects are in an "or" relationship.
The "plurality" appearing in the embodiments of the present application means two or more.
It should be understood that, in the embodiment of the present application, the processor may be a Central Processing Unit (CPU), and the processor may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
It will also be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example and not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (dddram), enhanced SDRAM (enhanced SDRAM), synchronous DRAM (SLDRAM), Synchronous Link DRAM (SLDRAM), and direct bus RAM (DR RAM).
The embodiments described above in this application may be implemented in whole or in part by software, hardware, firmware, or any other combination. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer instructions or the computer program are loaded or executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. 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 one website, computer, server, or data center to another website, computer, server, or data center by wire or wirelessly. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more collections of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.
It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
In the several embodiments provided in the present application, it should be understood that the disclosed method, apparatus and system may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative; for example, the division of the unit is only a logic function division, and there may be another division manner in actual implementation; for example, various elements or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of 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, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
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 (14)
1. An SSB candidate location index indication method, comprising:
determining the maximum number of SSB candidate position indexes which can be sent in a DRS transmission window under the current subcarrier interval;
determining the bit number occupied by sending the SSB candidate position index according to the maximum number of the SSB candidate position indexes;
determining to use the highest P bit in a PBCH effective load and a sequence of DMRS to indicate an SSB candidate position index according to the bit number, or to use the original SSB index bit and a newly added index bit in the PBCH load to indicate the SSB candidate position index, wherein the sequence of DMRS occupies Q bits, and P is the difference value between the bit number and Q;
sending an SSB, wherein the SSB comprises the PBCH payload, the highest four bits or the highest five bits in the PBCH payload are used for indicating SSB candidate position indexes, and the highest four bits in the PBCH payload comprise original SSB index bits and half-frame indication bits; the top five bits of the PBCH payload include an original SSB index bit, a field indication bit, and a system frame number lowest bit, and an original value of the field indication bit or the system frame number lowest bit in the PBCH payload is indicated with a free bit in a master information block payload.
2. The SSB candidate location index indication method of claim 1, wherein the determining the maximum number of SSB candidate location indexes that can be sent in a DRS transmission window at a current subcarrier spacing comprises:
determining a length of the DRS transmission window;
calculating a quantity coefficient under the current subcarrier interval, wherein the quantity coefficient is the quantity of time units contained in a time unit used by the DRS transmission window;
and determining the maximum number of the SSB candidate position indexes according to the length of the DRS transmission window, wherein the maximum number M of the SSB candidate position indexes is the product of the length of the DRS transmission window, the number of SSBs contained in the time unit and the number coefficient.
3. The SSB candidate position index indication method of claim 1, wherein the determining to indicate the SSB candidate position index using the highest P-bit in the PBCH payload and the sequence of the DMRS according to the number of bits comprises:
if the bit number is Q +4, indicating the SSB candidate position index by adopting the highest four bits in a PBCH effective load and the sequence of the DMRS;
if the number of bits is Q +5, indicating the SSB candidate position index by using the highest five bits in PBCH payload and the sequence of the DMRS.
4. The SSB candidate location index indication method of claim 1, further comprising:
indicating the original values of the field indication bits and the lowest bits of the system frame number in the PBCH payload with idle bits in a Master information Block payload.
5. The SSB candidate position index indication method according to claim 4, characterized in that the free bits in the master information block payload are selected from the group consisting of: and searching partial idle bits, reserved bits and bits occupied by subcarrier spacing indication of space 0 in a physical downlink control channel configuration field of the system information block 1.
6. The SSB candidate location index indication method of claim 1, further comprising:
configuring the original values of the field indication bits and the lowest bits of the system frame number in the PBCH payload as fixed values.
7. The SSB candidate location index indication method of claim 1, wherein a periodicity of the DRS is greater than 5 milliseconds when the SSB candidate location index is indicated using a sequence of the highest four bits in a PBCH payload and the DMRS;
when the SSB candidate position index is indicated by adopting the highest five bits in PBCH payload and the sequence of the DMRS, the period of the DRS is more than 10 milliseconds.
8. The method of claim 1, wherein the determining, according to the number of bits, to indicate the SSB candidate position index using an original SSB index bit and a newly added index bit in the PBCH load comprises:
determining 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, wherein the number of bits occupied by the original SSB index bits is 3;
and indicating the SSB candidate position index by adopting the 3 bits occupied by the original SSB index bit and the bits occupied by the newly added index bit, or indicating the SSB candidate position index by adopting the 3 bits occupied by the original SSB index bit, the bits occupied by the newly added index bit and the sequence of the DMRS.
9. An SSB candidate position index receiving method, comprising:
receiving an SSB, the SSB comprising a PBCH payload;
determining the maximum number of SSB candidate position indexes which can be sent in a DRS transmission window under the current subcarrier interval;
determining the bit number occupied by sending the SSB candidate position index according to the maximum number of the SSB candidate position indexes;
determining the highest P bit in the PBCH effective load according to the bit number, and determining the SSB candidate position index according to the highest P bit in the PBCH effective load and the sequence of the DMRS, or determining the SSB candidate position index according to the original SSB index bit and the newly added index bit in the PBCH effective load, wherein the sequence of the DMRS occupies Q bits, P is the difference value between the bit number and Q, the highest four bits or the highest five bits in the PBCH effective load are used for indicating the SSB candidate position index, and the highest four bits in the PBCH effective load comprise the original SSB index bit and a half-frame indicator bit; the top five bits of the PBCH payload include an original SSB index bit, a field indication bit, and a system frame number lowest bit, and an original value of the field indication bit or the system frame number lowest bit in the PBCH payload is indicated with a free bit in a master information block payload.
10. An SSB candidate location index indication apparatus, comprising:
a maximum number determining module, configured to determine a maximum number of SSB candidate position indexes that can be sent in a DRS transmission window at a current subcarrier interval;
a bit number determining module, configured to determine, according to the maximum number of the SSB candidate position indexes, a bit number occupied by sending the SSB candidate position indexes;
an indicating module, configured to determine, according to the bit number, to indicate an SSB candidate position index by using a highest P bit in a PBCH payload and a sequence of a DMRS, or to indicate the SSB candidate position index by using an original SSB index bit and a newly added index bit in the PBCH payload, where the sequence of the DMRS occupies Q bits, and P is a difference between the bit number and Q;
an SSB sending module, configured to send an SSB, where the SSB includes the PBCH payload, and the highest four bits or the highest five bits in the PBCH payload are used to indicate an SSB candidate position index, and the highest four bits in the PBCH payload include an original SSB index bit and a half-frame indicator bit; the top five bits of the PBCH payload include an original SSB index bit, a field indication bit, and a system frame number lowest bit, and an original value of the field indication bit or the system frame number lowest bit in the PBCH payload is indicated with a free bit in a master information block payload.
11. An SSB candidate location index receiving apparatus, comprising:
an SSB receiving module configured to receive an SSB, the SSB including a PBCH payload;
a maximum number determining module, configured to determine a maximum number of SSB candidate position indexes that can be sent in a DRS transmission window at a current subcarrier interval;
a bit number determining module, configured to determine, according to the maximum number of the SSB candidate position indexes, a bit number occupied by sending the SSB candidate position indexes;
an SSB candidate position index determining module, configured to determine a highest P bit in the PBCH payload according to the bit number, and determine the SSB candidate position index according to the highest P bit in the PBCH payload and a sequence of DMRS, or determine the SSB candidate position index according to an original SSB index bit and a newly added index bit in the PBCH payload, where the sequence of DMRS occupies Q bits, P is a difference between the bit number and Q, a highest four bits or a highest five bits in the PBCH payload are used to indicate the SSB candidate position index, and a highest four bits in the PBCH payload includes the original SSB index bit and a half-frame indicator bit; the top five bits of the PBCH payload include an original SSB index bit, a field indication bit, and a system frame number lowest bit, and an original value of the field indication bit or the system frame number lowest bit in the PBCH payload is indicated with a free bit in a master information block payload.
12. A computer readable storage medium having stored thereon computer instructions, wherein the computer instructions when executed perform the steps of the SSB candidate location index indication method of any of claims 1 to 8 or the steps of the SSB candidate location index reception method of claim 9.
13. 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 SSB candidate location index indication method of any of claims 1 to 8.
14. A user equipment 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 SSB candidate position index receiving method of claim 9.
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| CN201910734567.4A CN110336655B (en) | 2019-08-09 | 2019-08-09 | SSB candidate position index indication and receiving method and device, storage medium, base station and user equipment |
| PCT/CN2020/107602 WO2021027694A1 (en) | 2019-08-09 | 2020-08-07 | Ssb candidate position index indication method and apparatus, ssb candidate position index receiving method and apparatus, storage medium, base station, and user equipment |
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| CN111130716B (en) * | 2019-12-12 | 2022-04-22 | 展讯通信（上海）有限公司 | Method and device for processing candidate synchronous signal block |
| CN111130696A (en) * | 2019-12-19 | 2020-05-08 | 重庆邮电大学 | Downlink simulation platform based on 5G terminal simulator |
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| CN113766648B (en) * | 2020-06-05 | 2023-06-23 | 大唐移动通信设备有限公司 | SSB transmission method, device and equipment |
| WO2022021085A1 (en) * | 2020-07-28 | 2022-02-03 | Oppo广东移动通信有限公司 | Information indication method and apparatus, terminal device, and network device |
| CN116325974A (en) * | 2020-10-09 | 2023-06-23 | 苹果公司 | Synchronization signal block transmission in wireless communication |
| US20220312350A1 (en) * | 2020-10-09 | 2022-09-29 | Apple Inc. | Synchronization Signal Block Reception in Wireless Communications |
| US20230396399A1 (en) * | 2020-10-28 | 2023-12-07 | Beijing Xiaomi Mobile Software Co., Ltd. | Information transmission method, communication device and storage medium |
| WO2022087980A1 (en) * | 2020-10-29 | 2022-05-05 | 北京小米移动软件有限公司 | Information transmission method and apparatus, and communication device |
| WO2022183514A1 (en) * | 2021-03-05 | 2022-09-09 | Nec Corporation | Methods, devices, and computer readable medium for communication |
| CN115190575A (en) * | 2021-04-06 | 2022-10-14 | 展讯通信（上海）有限公司 | Synchronization signal block receiving method and electronic equipment |
| WO2022226739A1 (en) * | 2021-04-26 | 2022-11-03 | 北京小米移动软件有限公司 | Information transmission method and apparatus, communication device and storage medium |
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