CN114980125A

CN114980125A - Communication method, device and related equipment

Info

Publication number: CN114980125A
Application number: CN202210522414.5A
Authority: CN
Inventors: 不公告发明人
Original assignee: Nanjing Xingsi Semiconductor Co ltd
Current assignee: Nanjing Xingsi Semiconductor Co ltd
Priority date: 2022-05-13
Filing date: 2022-05-13
Publication date: 2022-08-30

Abstract

The application provides a communication method, a communication device and related equipment, wherein the method comprises the steps of determining resource configuration information for transmitting at least one side link synchronization signal block S-SSB; the resource configuration information is used for indicating that the number of target resources for transmitting at least one S-SSB is greater than a first numerical value, the first numerical value is the number of S-SSBs to be transmitted in one S-SSB transmission period, the target resources are located in a shared frequency band, and each target resource can transmit at least one S-SSB. The method provided by the embodiment of the application improves the communication reliability.

Description

Communication method, device and related equipment

Technical Field

The present application relates to the field of communications technologies, and in particular, to a communication method, an apparatus, and a related device.

Background

According to The discussion of The 94 th online conference of The Radio Access Network (RAN) of The third Generation Partnership Project (3 GPP), Release-18 (Release-18, Rel-18) will discuss introducing Sidelink communication, i.e., Sidelink-unlicensed (Sidelink-U), on a shared frequency band. However, when performing Sidelink communication over the shared frequency band, since the transmitter needs to perform Listen Before Talk (LBT) channel detection mechanism, when the terminal needs to transmit a Sidelink synchronization signal block (S-SSB), part of the S-SSB may not be successfully transmitted, thereby reducing communication reliability. That is, currently performing sidelink communication on the shared frequency band may result in low communication reliability.

Disclosure of Invention

The embodiment of the application provides a communication method, a communication device and related equipment, and solves the problem that the reliability of communication is low when sidelink communication is carried out on a shared frequency band.

In order to achieve the above object, in a first aspect, an embodiment of the present application provides a communication method, applied to a first terminal, including:

determining resource configuration information for transmitting at least one side link synchronization signal block S-SSB;

the resource configuration information is used for indicating the number of target resources for transmitting the at least one S-SSB, the number of the target resources is greater than a first numerical value, the first numerical value is the number of the S-SSBs to be transmitted in one S-SSB transmission period, and the target resources are located in a shared frequency band.

In a second aspect, an embodiment of the present application provides a communication apparatus, including:

a determining module, configured to determine resource configuration information for transmitting at least one side link synchronization signal block S-SSB;

the resource configuration information is used for indicating the number of target resources for transmitting the at least one S-SSB, the number of the target resources is greater than a first numerical value, the first numerical value is the number of the S-SSBs to be transmitted in one S-SSB transmission period, and the target resources are located in a shared frequency band. Number of S-SSBs to be transmitted in S-SSB transmission period

In a third aspect, an embodiment of the present application provides an electronic device, which includes a processor, a memory, and a computer program stored on the memory and executable on the processor, and when executed by the processor, the computer program implements the steps in the communication method according to the first aspect.

In a fourth aspect, the present application provides a readable storage medium, on which a program is stored, and when the program is executed by a processor, the program implements the steps in the communication method according to the first aspect.

In the embodiment of the application, the communication method comprises the steps of determining resource configuration information for transmitting at least one side link synchronization signal block S-SSB; the resource configuration information is used for indicating that the number of target resources for transmitting at least one S-SSB is larger than a first numerical value, the first numerical value is the number of the S-SSBs to be transmitted in one S-SSB transmission period, and the target resources are located in a shared frequency band. Therefore, when the sidelink communication is carried out in the shared frequency band, the number of the S-SSBs which are successfully sent can be increased by setting the number of the target resources for transmitting the S-SSBs to be larger than the first value, so that the receiving end can receive the sufficient number of the S-SSBs meeting the information transmission requirement, and the communication reliability is improved.

Drawings

For a clear explanation of the technical solutions in the embodiments of the present application, the drawings of the specification are described below, it is obvious that the following drawings are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the listed drawings without any inventive effort.

FIG. 1 is a schematic illustration of LBT bandwidth in the prior art;

fig. 2 is a block diagram of a network system to which an embodiment of the present application is applicable;

fig. 3 is a flowchart illustrating a communication method according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of an electronic device provided in an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. On the basis of the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without any creative effort belong to the protection scope of the present application.

For ease of understanding, the background information related to the present application is briefly described below.

When the Sidelink terminal device performs a synchronization process, a Sidelink synchronization signal block (S-SSB) needs to be transmitted and/or demodulated, and usually one S-SSB occupies one time slot.

Repeated transmission of multiple S-SSBs may be supported during one S-SSB transmission period, and in order to ensure flexibility of S-SSB configuration, the number of S-SSBs in the S-SSB transmission period is configurable, which is exemplified as follows:

frequency range 1(Frequency range 1, FR1), Sub-carrier spacing (SCS) 15kHz:1

FR1,SCS＝30kHz:1,2

FR1,SCS＝60kHz:1,2,4

Frequency range 2(Frequency range 2, FR2), SCS 60kHz:1,2,4,8,16,32

FR2,SCS＝120kHz:1,2,4,8,16,32,64

As shown in the above example, for FR1, a maximum of 4S-SSBs are supported for transmission within one S-SSB transmission period; for FR2, a maximum of 64S-SSBs are supported for transmission within one S-SSB transmission period.

To alleviate The congestion of The licensed spectrum resources and improve The throughput of The Sidelink system, according to The discussion of The Radio Access Network (RAN) 94 th online conference on The third Generation Partnership Project (3 GPP), Release-18 (Release-18, Rel-18) will discuss Sidelink (Sidelink) communication over The shared frequency band (unlicensed and unlicensed spectrum resources), i.e., Sidelink-unlicensed (Sidelink-U).

When applying Sidelink to the shared frequency band, the transmitter needs to perform Listen Before Talk (LBT) channel detection mechanism, which is also applicable to the transmission of Sidelink synchronization signal block (S-SSB), that is, before transmitting S-SSB, the transmitter needs to perform Listen before talk channel detection mechanism. Listen Before Talk (LBT) is a widely used technique in radio communications, in which a radio transmitter first listens to its radio environment before starting transmission, detects whether a channel is idle, and waits for transmission when the channel is idle if the channel is busy, thereby avoiding channel access collision.

The basic bandwidth of LBT is specified in 3GPP Release-16 (Release-16, Rel-16) to be 20 MHz. To support a single carrier across a continuous 100MHz bandwidth, a sensing mechanism based on multiple LBT bandwidths needs to be performed on the continuous carrier bandwidth.

In a specific implementation, for downlink, multiple Bandwidth parts (BWPs) are configured, a single BWP is activated, and the base station may send downlink information in the activated BWP and LBT successful part. For the uplink, multiple BWPs may also be configured, and a single BWP is active, and the ue may send uplink information on the activated BWP and LBT successful part. Because the interception result corresponding to the transmission resource of the S-SSB may be an LBT failure, and the terminal cannot perform S-SSB transmission on the corresponding resource, part of the S-SSB may not be successfully transmitted, thereby reducing the communication reliability.

Illustratively, as shown in fig. 1, the BWP includes 3 LBT bandwidths, and in this case, a transmitter (e.g., a terminal) may perform LBT on the 3 LBT bandwidths, respectively. Assuming that the transmitter performs the listening mechanism on the first slot 1 in the three LBT bandwidths, the transmitter successfully occupies the channels on the LBT bandwidth 1 and the LBT bandwidth 3, but cannot occupy the LBT bandwidth 2, that is, the corresponding event on the LBT bandwidth 2 is LBT failure. Then starting at slot 2, the transmitter may transmit information on LBT bandwidth 1 and LBT bandwidth 3, but may not transmit information on LBT bandwidth 2. If the S-SSB is configured to transmit at LBT bandwidth 2, the S-SSB transmitted through LBT bandwidth 2 cannot be successfully transmitted, which reduces communication reliability.

To solve this problem, the present application provides a communication method, which is described in detail below.

Referring to fig. 2, fig. 2 is a structural diagram of a network system to which the embodiment of the present application is applicable, and as shown in fig. 2, the network system includes a first terminal 11, a second terminal 12 and a network side device 13. The first terminal 11, the second terminal 12 and the network side device 13 can communicate with each other.

The first terminal 11 or the second terminal 12 may also be referred to as a User Equipment (UE), or a User terminal, and in practical applications, the terminal may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), or a vehicle-mounted Device. The network side device 13 may be a base station, an access point, or other network elements.

The following describes a communication method provided in an embodiment of the present application.

Referring to fig. 3, fig. 3 is a schematic flowchart of a communication method provided in an embodiment of the present application. The communication method shown in fig. 3 may be performed by the first terminal 11.

As shown in fig. 3, the communication method may include the steps of:

step 201, determining resource configuration information for transmitting at least one side link synchronization signal block S-SSB;

the resource configuration information is used for indicating the number of target resources for transmitting the at least one S-SSB, the number of the target resources is greater than a first numerical value, the first numerical value is the number of the S-SSBs to be transmitted in one S-SSB transmission period, and the target resources are located in a shared frequency band. It should be understood that each target resource may transmit one or more S-SSBs, typically one S-SSB per target resource.

As described above, in the case of determining the influence factors such as the frequency range and the subcarrier spacing, the number of the S-SSBs to be transmitted in one S-SSB transmission period is determined to be the first numerical value. After sidelink is applied to a shared frequency band, namely an unlicensed spectrum and an unlicensed spectrum, in order to avoid that part of S-SSBs cannot be successfully transmitted due to LBT, the number of target resources for transmitting the S-SSBs can be increased, and the number of the target resources is larger than a first value, so that even if the S-SSBs on part of the target resources cannot be successfully transmitted due to LBT, the S-SSBs successfully transmitted on other target resources can meet the requirement of information transfer, and the communication reliability is improved.

Specifically, if the number of the S-SSBs to be transmitted in one S-SSB transmission period is 5, when sidelink communication is performed in the shared frequency band, due to LBT, the 5S-SSBs to be transmitted in one S-SSB transmission period may only be successfully transmitted by 4, the number of the target resources may be set to be greater than 5, for example, the number of the target resources is set to be 6, so that if one S-SSB fails to transmit due to LBT, the transmitting end still has a chance to transmit the 5S-SSBs (that is, the S-SSBs that cannot be transmitted due to LBT are retransmitted), thereby improving communication reliability.

In the embodiment of the application, the communication method comprises the steps of determining resource configuration information for transmitting at least one side link synchronization signal block S-SSB; the resource configuration information is used for indicating that the number of target resources for transmitting at least one S-SSB is larger than a first numerical value, the first numerical value is the number of the S-SSBs to be transmitted in one S-SSB transmission period, and the target resources are located in a shared frequency band. Therefore, when the sidelink is applied to the shared frequency band, the number of the S-SSBs successfully transmitted can be increased by setting the number of the target resources for transmitting the S-SSBs to be larger than the first value, so that the receiving end can receive a sufficient number of S-SSBs meeting the information transmission requirement, and the communication reliability is improved.

Optionally, the number of the target resources is a value obtained by rounding up the first numerical value multiplied by M; or the number of the target resources is a value obtained by adding N to the first numerical value, M is a real number greater than 1, and N is a positive integer.

In specific implementation, the number of target resources is [ sl-numsb-withperiod x M ], sl-numsb-withperiod is the number of S-SSBs to be transmitted in one S-SSB transmission period, and M may be 1.2, 1.5, 2, or the like. Or the number of the target resources is sl-numsb-withperiod + N, N can be 1,2, 3, 4, and the like, and the values of M and N can be configured in advance.

Optionally, the resource configuration information is determined according to at least one of the following:

the first terminal is preconfigured;

the first terminal is configured by itself;

first indication information sent by network side equipment;

and second indication information sent by the second terminal.

In a specific implementation, the pre-configuration may be factory configuration. The self-configuration means that in an actual application scene, the first terminal determines the resource configuration information according to the actual situation. The first terminal can also receive first indication information sent by the network side equipment, and determines resource configuration information according to the content of the first indication information; or receiving second indication information of a second terminal which is communicated with the second terminal, and determining the resource configuration information according to the content of the second indication information.

After determining the resource configuration information, the first terminal may send the S-SSB to the third terminal according to the resource configuration information, where it should be noted that the third terminal and the second terminal may be the same terminal. For example, if the number of the S-SSBs to be transmitted in one S-SSB transmission period is 4, the number of the target resources may be determined to be 6, and the first terminal sends the S-SSBs on all the 6 target resources. That is, in one embodiment of the present application, the S-SSB may be sent on all of the determined target resources.

Optionally, the method further comprises:

determining the index of the first target resource as the index of the first S-SSB;

or determining a first remainder obtained by dividing the index of the first target resource by a preset Q as the index of the first S-SSB, wherein Q is a positive integer;

the first S-SSB is any one of the at least one S-SSB, and the first target resource is a target resource for transmitting the first S-SSB in the target resources.

In a specific implementation, the index of the first target resource may be determined according to the position of the first target resource in the time domain, and for example, if 5 target resources are used in one S-SSB transmission period, the 5 target resources may sequentially determine indexes as 1,2, 3, 4, and 5 in order from small to large in the time domain. If the first target resource is 3, the index of the first S-SSB transmitted by the first target resource may also be 3; or the Q value can be preset to be 2, the index of the first target resource is divided by 2 to obtain a

first remainder

1, and 1 is determined as the index of the first S-SSB.

Further, a third terminal receiving the S-SSB may be indicated by a parameter SL-SyncConfig in a Radio Resource Control (RRC) message by the index of the S-SSB.

In order to make the transmission and/or reception of the S-SSBs more concise and efficient, a quasi-co-located QCL relationship may be established between the partial S-SSBs in at least one S-SSB, so that at least partially identical spatial parameters (e.g., the same parameters of the transmission beams in the spatial parameters) may be used when transmitting and/or receiving the S-SSBs having the QCL relationship, thereby improving communication efficiency. Optionally, the method further comprises:

establishing a quasi co-location QCL relationship between a portion of the at least one S-SSB based on the index of the S-SSB, or the index of the target resource transmitting the S-SSB.

It should be understood that the index of the S-SSB, and/or the index of the target resource transmitting the S-SSB, may be determined according to the method provided in the embodiments of the present application, and may be pre-configured according to other rules. During specific implementation, QCL relationship is reserved between the S-SSBs with indexes as the first preset values through network side equipment, and QCL relationship is reserved between the S-SSBs with indexes as the second preset values through the first terminal. If so, the network side equipment sets the QCL relationship among S-SSBs with indexes within 10 in advance; in another example, the first terminal presets QCL relationships between S-SSBs with indexes 3, 5, and 7. It should be noted that the index may refer to an index of the S-SSB, and may also refer to an index of a target resource transmitting the S-SSB.

Optionally, the setting, according to the index of the S-SSB or the index of the target resource transmitting the S-SSB, a part of the S-SSBs in the at least one S-SSB to have a quasi co-located QCL relationship includes:

sequentially dividing the index of each S-SSB of the at least one S-SSB by V to obtain a second remainder corresponding to each S-SSB of the at least one S-SSB; establishing a QCL relationship between the S-SSBs with the same second remainder, wherein V is a positive integer;

or dividing the index of the target resource for transmitting each S-SSB in the at least one S-SSB by P in sequence to obtain a third remainder corresponding to each S-SSB in the at least one S-SSB; a QCL relationship is established between S-SSBs for which the third remainder is the same, P being a positive integer.

In specific implementation, if there are 7S-SSBs, the indexes are sequentially 1,2, 3, 4, 5, 6, and 7, and the preset V is 4, then the second remainders sequentially corresponding to the 7S-SSBs are respectively 1,2, 3, 0, 1,2, and 3, and a QCL relationship can be established between the S-SSBs with the same second remainders. Namely, a quasi co-location relationship is established between S-SSBs corresponding to indexes 1 and 5 of the S-SSBs, a quasi co-location relationship is established between S-SSBs corresponding to indexes 2 and 6 of the S-SSBs, and a quasi co-location relationship is established between S-SSBs corresponding to indexes 3 and 7 of the S-SSBs.

Similarly, if there are 7S-SSBs in total, the indexes of the target resources transmitting the 7S-SSBs are sequentially 1,2, 3, 4, 5, 6, and 7, and the preset P is 2, then the third remainders sequentially corresponding to the 7S-SSBs are respectively 1, 0, and 1, and a QCL relationship can be established between the S-SSBs with the same third remainders. Namely, a quasi co-location relation is established among S-SSBs corresponding to the indexes of target resources for transmitting S-SSBs being 1, 3, 5 and 7, and a quasi co-location relation is established among S-SSBs corresponding to the indexes of target resources for transmitting S-SSBs being 2,4 and 6.

It should be understood that QCL relationships between target resources may be established in a similar manner and will not be described in detail herein.

As already mentioned above, the S-SSB may be sent on all determined target resources, but to save communication resources, the S-SSB may also be transmitted first using target resources in the first set of target resources that match the first value in a pre-configured manner. And in the case that S-SSBs which are unsuccessfully transmitted (i.e. sent) due to LBT failure occur in one S-SSB transmission period, transmitting the S-SSBs with failed sending by using the target resources in the second target resource set. The second target resource set is a set of remaining target resources of the target resources except the target resources in the first target resource set.

The following description will take example one as an example. And if the number of the S-SSBs to be transmitted in one S-SSB transmission period is 4, determining that the number of the target resources is 6. I.e. the first value is 4, the 6 target resources may sequentially determine indexes as 1,2, 3, 4, 5, and 6 in the order from small to large in the time domain. The pre-configuration mode is that target resources with indexes of 1,2, 3 and 4 respectively transmit 4S-SSBs, then the target resources in the first target resource set matched with the first value are target resources with indexes of 1,2, 3 and 4, and the target resources in the second target resource set are target resources with indexes of 5 and 6. And if the S-SSB transmitted by the target resource with the index of 3 fails, selecting one target resource from the second target resource set to transmit the S-SSB with the failed transmission.

Therefore, in an embodiment of the present application, the method further includes:

sending the at least one S-SSB to a third terminal according to the resource configuration information;

under the condition that the target S-SSB fails to be sent, sending the target S-SSB on a second target resource, wherein the target S-SSB is any one S-SSB in the at least one S-SSB, and the second target resource is a target resource selected from the target resources according to a preset rule;

wherein the target S-SSB fails to send on the third target resource, and the preset rule includes:

determining a target resource which is available in the target resources and has a quasi-co-location relation with the third target resource as the second target resource;

or determining a target resource which is available in the target resources and is closest to the third target resource as the second target resource;

or determining any available target resource in the target resources as the second target resource.

Still taking the example one as an example for description, the third target resource is the target resource with the index of 3, and the second target resource may select one of the target resources with the indexes of 5 and 6 according to a preset rule. Typically, the target resources in the default second target resource set are available, that is, the target resources are not used by other requirements and can be used for sending the S-SSB.

If the target resource with index 3 and the target resource with index 6 have a quasi-co-location relationship, the target resource with index 6 may be determined as the second target resource. It should be understood that if more than one target resource is available from the target resources and has a quasi-co-location relationship with the third target resource, one of the target resources may be selected to be the second target resource.

Or the target resource which is available in the target resources and is closest to the third target resource, that is, the target resource with the index of 5, may be determined as the second target resource.

Or one of the target resources with index 5 or index 6 is selected and determined as the second target resource. In this case, one of the options may be a random option or a pre-designated option.

Specifically, if a specific target resource is pre-designated to transmit the failed S-SSB, the failed S-SSB is transmitted on the pre-designated target resource. That is, if the target resource with index 5 is pre-designated for transmitting the S-SSB with transmission failure, when the event that the target S-SSB fails to transmit on the third target resource occurs, the target S-SSB is transmitted again on the target resource with index 5.

Further, if there is an S-SSB unsuccessfully transmitted due to LBT failure in one S-SSB transmission period, the first terminal may not transmit the unsuccessfully transmitted S-SSB any more.

In order to improve reliability of the Communication system, optionally, the first terminal may carry S-SSB index information through a Direct Communication-Radio Resource Control (ProSe Direct Communication 5-Radio Resource Control, PC5-RRC) message, which is used to indicate an index of the S-SSB of a third terminal that receives the S-SSB.

In order to achieve the effect of saving energy, in an embodiment of the present application, the method further includes:

according to the resource configuration information, sending the at least one S-SSB to a third terminal so that the third terminal receives the S-SSB in a first period;

wherein, the length of the first time interval is less than or equal to the length of the channel occupation time, and the starting time of the first time interval is:

the moment when the third terminal receives the S-SSB for the first time;

or the start time of the S-SSB transmission period.

Specifically, the third terminal receiving the S-SSB may receive/demodulate only the S-SSB located within the first period.

The first period may be a discovery burst transmission window (discovery burst transmission window), and a start point of the discovery burst transmission window may be a time when the third terminal first receives/demodulates the S-SSB. The start of the discovery burst transmission window may also be the start of the S-SSB transmission period, e.g., the (first symbol of the) first slot in the S-SSB transmission period. The length of the first period is less than or equal to the length of a Channel Occupancy Time (COT).

Optionally, the determining an index of the first target resource as an index of the first S-SSB; or after determining a first remainder obtained by dividing the index of the first target resource by a preset Q as the index of the first S-SSB, the method further includes:

and setting the transmission beams of at least part of the at least one S-SSB to be the same according to the index of the S-SSB. The same transmission beam means that at least part of the large-scale parameters are the same, e.g. the spatial transmission parameters are the same.

In a specific implementation, the mode of the transmission beam of the S-SSB may be specified according to the index of the S-SSB, for example, the transmission beam modes with the indexes of the S-SSB being 1,2, 3, 4, 5, and 6 are set to be 0, 1,2, 0, 1, and 2 in sequence.

Further, the transmission beam pattern of the S-SSB may also be specified according to the slot index of the transmission S-SSB, such as setting the slot index of the S-SSB to 1,2, 3, 4, 5, 6 as 1,2, 1,2 in sequence. For another example, modulo operation is performed on the slot index, and the S-SSBs corresponding to the slot indexes with the same mod (R, S) result use the same transmission beam. Wherein, R is a time slot index, and S is a positive integer.

Further, since the transmission space parameters corresponding to the S-SSBs having the QCL relationship are at least partially the same, for example, the configuration information of the transmission beams is the same, the transmission beams corresponding to the part of S-SSBs in the at least one S-SSB may also be made the same by setting the part of S-SSBs having the QCL relationship.

Currently, the sidelink technology lacks an interactive mode of beam information. For example, a) the transmitter cannot indicate beam information corresponding to the channel/signal; b) the receiving end cannot feed back the optimal reception beam information. This may not be sufficient for sidelink coverage requirements for new generation communication systems based on beam transmission, absent beam management methods.

In order to solve the missing beam information interaction mode in the sidelink, the sidelink covering capability is improved. Optionally, each S-SSB of the at least one S-SSB carries indication information for indicating a configuration of a transmission beam of each S-SSB.

The configuration of the transmission beam refers to what mode, parameter, etc. the transmission beam is configured. In a specific implementation, the indication information may include at least one of a mode of a transmission beam of the S-SSB, a large-scale parameter of the transmission beam, such as a spatial transmission parameter, and a direction of the beam.

The mode of transmitting the indication information comprises the following steps:

in a first manner, the indication information is carried by reserved bits in a Physical Sidelink Broadcast Channel (PSBCH) in the at least one S-SSB;

in the second mode, the indication information is carried by a Direct Communication-Radio Resource Control (ProSe Direct Communication 5-Radio Resource Control, PC5-RRC) message;

mode three, the indication Information is transmitted through Sidelink Control Information (SCI).

Exemplarily, as shown in table 1, a mapping relationship of the value of the reserved bit and the pattern of the transmission beam may be established in advance. And then indicates the mode of the transmission beam used by the third terminal receiving the S-SSB to transmit the S-SSB by setting the value of the reserved bit in the PSBCH.

Ratio of reservationSpecific value	Mode of transmitting beams
		00	0
01	1
		10	2
11	3

TABLE 1

In a specific implementation, the indication information may be carried by transmitting a slot index of the at least one S-SSB or transmitting an index of a target resource of the at least one S-SSB. The PSBCH in S-SSB can carry the slot index.

Illustratively, as shown in tables 2 and 3, a mapping relationship of the slot index and the mode of the transmission beam may be predefined. Table 2 shows a mapping relationship between the slot index and 4 transmission beams when the subcarrier spacing SCS is 15KHz (time domain length is 1 frame 10ms), and table 3 shows a mapping relationship between the slot index and 8 transmission beams when the subcarrier spacing SCS is 30KHz (time domain length is 1 frame 10 ms).

Time slot index	0	1	2	3	4	5	6	7	8	9
											Transmission beam	0	1	2	3	0	1	2	3	0	1

TABLE 2

TABLE 3

In this way, the third terminal receiving the S-SSB may indicate the transmission beam pattern adopted for transmitting the S-SSB according to the predefined mapping relationship between the slot index and the transmission beam pattern and the slot index that may be carried in the PSBCH in the S-SSB.

Further, the mapping relationship between the S-SSB index and the transmission beam pattern may be predefined, so that the third terminal receiving the S-SSB may indicate the transmission beam pattern adopted by the S-SSB according to the predefined mapping relationship between the S-SSB index and the transmission beam pattern and the PSBCH in the S-SSB. In particular, at least part of bits of a slot index indication field in the PSBCH can be used for indicating the S-SSB index. The correspondence between the number of S-SSBs and the required number of bits can be as shown in Table 4.

Number of S-SSBs	1	2	4	8	16	32	64	128
									Number of bits	1	1	2	3	4	5	6	7

TABLE 4

The bit number refers to the number of bits required for completely indicating the S-SSB index, and for example, when the bit number is 7, the number of S-SSB indexes that can be indicated is 128. In order to notify the third terminal receiving the S-SSB of the mode of the transmission beam used by transmitting the S-SSB, so as to enhance the interaction of the beam information in the Sidelink and further improve the Sidelink coverage capability, optionally, the first terminal indicates the beam information used by transmitting the S-SSB through a PC5-RRC message or Sidelink Control Information (SCI), where the beam information includes the mode of the transmission beam.

In order to enable the third terminal receiving the S-SSB to feed back the mode of the optimal transmission beam to the first terminal, so as to enhance the interaction of the beam information in the sidelink and further improve the coverage capability of the sidelink, optionally, the third terminal may feed back the configuration of the optimal transmission beam through a PC5-RRC message or an SCI, where the configuration of the optimal transmission beam includes the mode of the optimal transmission beam, and the mode of the optimal transmission beam refers to that the S-SSB is transmitted in this mode, and the signal received by the third terminal is strongest.

Referring to fig. 4, an embodiment of the present application further provides a communication apparatus 300, including:

a determining module 301, configured to determine resource configuration information for transmitting at least one side link synchronization signal block S-SSB;

the resource configuration information is used for indicating that the number of target resources for transmitting the at least one S-SSB is greater than a first value, the first value is the number of S-SSBs to be transmitted in one S-SSB transmission period, the target resources are located in a shared frequency band, and each target resource can transmit the at least one S-SSB.

the first terminal is preconfigured;

the first terminal is configured by itself;

first indication information sent by network side equipment;

and second indication information sent by the second terminal.

Optionally, the number of the target resources is a value obtained by rounding up the first numerical value multiplied by M;

or the number of the target resources is a value obtained by adding N to the first numerical value, M is a real number greater than 1, and N is a positive integer.

Optionally, the apparatus 300 further comprises:

or dividing the index of the target resource for transmitting each S-SSB in the at least one S-SSB by P in sequence to obtain a third remainder corresponding to each S-SSB in the at least one S-SSB; QCL relationships are established between S-SSBs with the same third remainder, P being a positive integer.

Optionally, each S-SSB of the at least one S-SSB carries indication information for indicating a configuration of a transmission beam of each S-SSB;

or the indication information is carried by direct communication-radio resource control PC5-RRC message;

or the indication information is carried by sidelink control information SCI.

Optionally, a manner that each S-SSB of the at least one S-SSB carries indication information for indicating a configuration of a transmission beam of each S-SSB includes:

the indication information is carried by reserved bits in a physical side link broadcast channel PSBCH in the at least one S-SSB;

or the indication information is carried by transmitting the time slot index of the at least one S-SSB;

or the index of the S-SSB carries the indication information.

Optionally, the apparatus 300 further comprises:

or determining the target resource which is available in the target resources and is closest to the third target resource as the second target resource;

Optionally, the apparatus 300 further comprises:

the moment when the third terminal receives the S-SSB for the first time;

or the start time of the S-SSB transmission period.

The communication device 300 provided in this embodiment of the present application can implement each process that can be implemented in this embodiment of the communication method of the present application, and achieve the same beneficial effects, and for avoiding repetition, details are not repeated here.

The embodiment of the application provides electronic equipment. As shown in fig. 5, the electronic device 400 includes: a processor 401, a memory 402 and a computer program stored on and executable on said memory 402, the various components in the electronic device 400 being coupled together by a bus system 403. It will be appreciated that the bus system 403 is used to enable communications among the components connected.

The processor 401 is configured to determine resource configuration information for transmitting at least one side link synchronization signal block S-SSB;

the first terminal is preconfigured;

the first terminal is configured by itself;

first indication information sent by network side equipment;

and second indication information sent by the second terminal.

Optionally, the processor 401 is further configured to determine an index of the first target resource as an index of the first S-SSB;

Optionally, the processor 401 is further configured to:

or sequentially dividing the index of the target resource for transmitting each S-SSB in the at least one S-SSB by P to obtain a third remainder corresponding to each S-SSB in the at least one S-SSB; QCL relationships are established between S-SSBs with the same third remainder, P being a positive integer.

or the indication information is carried by the sidelink control information SCI.

or the index of the S-SSB carries the indication information.

Optionally, the processor 401 is further configured to send the at least one S-SSB to a third terminal according to the resource configuration information;

Optionally, the processor 401 is further configured to send the at least one S-SSB to a third terminal according to the resource configuration information, so that the third terminal receives the S-SSB located in the first time period;

the moment when the third terminal receives the S-SSB for the first time;

or the start time of the S-SSB transmission period.

The electronic device 400 provided in the embodiment of the present application can implement each process that can be implemented in the embodiment of the communication method of the present application, and achieve the same beneficial effects, and for avoiding repetition, the details are not repeated here.

The embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements the processes of the communication method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A communication method, applied to a first terminal, comprising:

2. The method of claim 1, wherein the resource configuration information is determined according to at least one of:

the first terminal is preconfigured;

the first terminal is configured by itself;

first indication information sent by network side equipment;

and second indication information sent by the second terminal.

3. The method of claim 1, wherein the number of target resources is the first value multiplied by M and then rounded;

4. The method of claim 1, further comprising:

the first S-SSB is any one S-SSB in the at least one S-SSB, and the first target resource is a target resource used for transmitting the first S-SSB in the target resources.

5. The method of claim 1, further comprising:

6. The method of claim 5, wherein establishing the quasi co-located QCL relationship between the partial S-SSBs of the at least one S-SSB according to the index of the S-SSB or the index of the target resource on which the S-SSB is transmitted comprises:

sequentially dividing the index of each S-SSB of the at least one S-SSB by V to obtain a second remainder corresponding to each S-SSB of the at least one S-SSB; establishing a QCL relation between S-SSBs with the same second remainder, wherein V is a positive integer;

7. The method of claim 1, wherein each S-SSB of the at least one S-SSB carries indication information indicating a configuration of a transmission beam of each S-SSB;

8. The method of claim 7, wherein the manner in which each S-SSB of the at least one S-SSB carries indication information for indicating a configuration of a transmission beam of each S-SSB comprises:

or the index of the S-SSB carries the indication information.

9. The method of claim 1, further comprising:

10. The method of claim 1, further comprising:

the moment when the third terminal receives the S-SSB for the first time;

or the start time of the S-SSB transmission period.

11. A communications apparatus, comprising:

the resource configuration information is used for indicating the number of target resources for transmitting the at least one S-SSB, the number of the target resources is greater than a first numerical value, the first numerical value is the number of S-SSBs to be transmitted in one S-SSB transmission period, and the target resources are located in a shared frequency band.

12. An electronic device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps in the communication method according to any one of claims 1 to 10.

13. A readable storage medium, characterized in that the readable storage medium has stored thereon a program which, when executed by a processor, carries out the steps in the communication method according to any one of claims 1 to 10.