Information transmission method and apparatus, and terminal device

1 . An information transmission method performed by a first terminal device, comprising:

sending first information to at least one second terminal device, wherein the first information is used for assisting the second terminal device to select or reserve a cycle resource for transmission of assistance information,

the assistance information is used for assisting a third terminal device to select or reserve a resource for data transmission, and the third terminal device is a device receiving the assistance information;

the first information comprises:

configuration information of the cycle resource;

redundancy version (RV) configuration information used for the data transmission;

the first information is carried in target information, and the target information comprises sidelink control information; the sidelink control information further comprises first-level sidelink control information and second-level sidelink control information.

2 . The method according to claim 1 , wherein the first information further comprises at least one of the following information:

resource release indication information;

resource enabling indication information;

sending power information used for the transmission of the assistance information;

modulation and coding strategy (MCS) information used for the transmission of the assistance information;

transport block size indication information;

hybrid automatic repeat request (HARQ) process quantity information used for the data transmission; or

HARQ process offset information used for the data transmission.

3 . The method according to claim 2 , wherein the configuration information of the cycle resource comprises at least one of the following:

resource time domain location information;

resource frequency domain location information;

resource time domain offset information;

resource frequency domain offset information;

a resource cycle;

a time interval between adjacent resource patterns;

a valid duration of the cycle resource; or

a number of times of the cycle resource.

4 . The method according to claim 1 , wherein the sending first information to at least one second terminal device comprises:

sending, on a first resource, the first information to the at least one second terminal device; and the first resource comprises at least one of the following:

a physical sidelink feedback channel;

a physical sidelink data channel;

a physical sidelink control channel;

a physical uplink control channel;

a physical uplink data channel;

a resource in a specific resource pool;

a resource on a specific sub-band in the resource pool;

a resource on a specific symbol in the resource pool; or

a resource on a specific sub-frame in the resource pool.

5 . The method according to claim 1 , wherein

a resource cycle of the cycle resource is indicated by a first indication field in the target information; and each code point in the first indication field respectively corresponds to at least one duration, wherein

the first indication field is an independent indication field, or the first indication field is a jointly encoded indication field.

6 . The method according to claim 1 , wherein

a valid duration of the cycle resource is indicated by a second indication field in the target information; and each code point in the second indication field respectively corresponds to at least one duration, wherein

the second indication field is an independent indication field, or the second indication field is a jointly encoded indication field.

7 . The method according to claim 3 , further comprising:

determining the configuration information of the cycle resource according to quality of service QoS information of a to-be-transmitted service.

8 . The method according to claim 1 , wherein

RV configuration information used for the data transmission is indicated by a ninth indication field in the target information; and each code point in the ninth indication field respectively corresponds to at least one type of RV configuration, wherein

the ninth indication field is an independent indication field, or the ninth indication field is a jointly encoded indication field.

9 . A terminal device, comprising:

a processor; and

a memory storing a program or instruction that is executable on the processor, wherein the program or instruction, when executed by the processor, causes the terminal device to perform the following steps:

sending first information to at least one second terminal device, wherein the first information is used for assisting the second terminal device to select or reserve a cycle resource for transmission of assistance information,

the assistance information is used for assisting a third terminal device to select or reserve a resource for data transmission, and the third terminal device is a device receiving the assistance information;

the first information comprises:

configuration information of the cycle resource;

redundancy version (RV) configuration information used for the data transmission;

the first information is carried in target information, and the target information comprises sidelink control information; the sidelink control information further comprises first-level sidelink control information and second-level sidelink control information.

10 . The terminal device according to claim 9 , wherein the first information further comprises at least one of the following information:

resource release indication information;

resource enabling indication information;

sending power information used for the transmission of the assistance information;

modulation and coding strategy (MCS) information used for the transmission of the assistance information;

transport block size indication information;

hybrid automatic repeat request (HARQ) process quantity information used for the data transmission; or

HARQ process offset information used for the data transmission.

11 . The terminal device according to claim 10 , wherein the configuration information of the cycle resource comprises at least one of the following:

resource time domain location information;

resource frequency domain location information;

resource time domain offset information;

resource frequency domain offset information;

a resource cycle;

a time interval between adjacent resource patterns;

a valid duration of the cycle resource; or

a number of times of the cycle resource.

12 . The terminal device according to claim 9 , wherein the sending first information to at least one second terminal device comprises:

sending, on a first resource, the first information to the at least one second terminal device; and the first resource comprises at least one of the following:

a physical sidelink feedback channel;

a physical sidelink data channel;

a physical sidelink control channel;

a physical uplink control channel;

a physical uplink data channel;

a resource in a specific resource pool;

a resource on a specific sub-band in the resource pool;

a resource on a specific symbol in the resource pool; or

a resource on a specific sub-frame in the resource pool.

13 . The terminal device according to claim 9 , wherein

a resource cycle of the cycle resource is indicated by a first indication field in the target information; and each code point in the first indication field respectively corresponds to at least one duration, wherein

the first indication field is an independent indication field, or the first indication field is a jointly encoded indication field.

14 . The terminal device according to claim 9 , wherein

a valid duration of the cycle resource is indicated by a second indication field in the target information; and each code point in the second indication field respectively corresponds to at least one duration, wherein

the second indication field is an independent indication field, or the second indication field is a jointly encoded indication field.

15 . The terminal device according to claim 11 , wherein the program or instruction, when executed by the processor, causes the terminal device to further perform the following steps:

determining the configuration information of the cycle resource according to quality of service QoS information of a to-be-transmitted service.

16 . The terminal device according to claim 9 , wherein

RV configuration information used for the data transmission is indicated by a ninth indication field in the target information; and each code point in the ninth indication field respectively corresponds to at least one type of RV configuration, wherein

the ninth indication field is an independent indication field, or the ninth indication field is a jointly encoded indication field.