Resource reselection assistance method and apparatus and resource reselection method and apparatus

1 . A method, comprising:

receiving control information from a first terminal, wherein the control information indicates a first resource and a second resource, the first resource carries first data corresponding to the control information, and the second resource is a sending resource reserved by the first terminal;

determining that the second resource meets a reselection condition, wherein determining that the second resource meets the reselection condition comprises:

determining that the second resource and a third resource overlap, and a priority of the third resource is higher than a priority of the second resource, and wherein the third resource is a sending resource reserved by a second terminal; and

sending indication information to the first terminal, wherein the indication information indicates to reselect the second resource, and wherein the indication information is a third sequence, and the third sequence is sent on a feedback resource in a second feedback resource set, wherein the second feedback resource set is different from a first feedback resource set, a feedback resource in the first feedback resource set is used to send a first sequence and a second sequence, the first sequence is used to carry an acknowledgment (ACK) corresponding to the first resource, and the second sequence is used to carry a negative acknowledgment (NACK) corresponding to the first resource.

2 . The method according to claim 1 , wherein determining that the second resource meets the reselection condition comprises:

determining that the second resource and the third resource overlap, wherein a reference signal received power (RSRP) measurement value on a fourth resource is greater than an RSRP measurement value on the first resource.

3 . The method according to claim 1 , wherein the control information further comprises resource reselection trigger information, and the resource reselection trigger information triggers performing resource reselection assistance.

4 . The method according to claim 1 , further comprising:

receiving resource reselection enabling information, wherein the resource reselection enabling information enables resource reselection assistance.

5 . The method according to claim 1 , wherein an index of the third sequence meets:

(

P

ID

+

M

ID

)

⁢

mod

⁢

R

PRB

,

CS

,

PSFCH

P ID is a physical layer source address identifier carried in the control information, M ID is an identifier of the indication information, and

R

PRB

,

CS

PSFCH

is a quantity of sequences that are able to be transmitted on the feedback resource in the second feedback resource set.

6 . A method, comprising:

sending control information to a third terminal, wherein the control information indicates a first resource and a second resource, the first resource carries first data corresponding to the control information, and the second resource is a sending resource reserved by a first terminal;

receiving indication information sent by the third terminal, wherein the indication information indicates to reselect the second resource, the indication information being received based on the second resource and a third resource overlapping, and a priority of the third resource being higher than a priority of the second resource, and wherein the third resource is a sending resource reserved by a second terminal; and

performing resource reselection on the second resource; and

wherein the indication information is a third sequence, and the third sequence is received on a feedback resource in a second feedback resource set, wherein the second feedback resource set is different from a first feedback resource set, a feedback resource in the first feedback resource set is used to send a first sequence and a second sequence, the first sequence is used to carry an acknowledgment (ACK) corresponding to the first resource, and the second sequence is used to carry a negative acknowledgment (NACK) corresponding to the first resource.

7 . The method according to claim 6 , wherein the control information further comprises resource reselection trigger information, and the resource reselection trigger information triggers the third terminal to perform resource reselection assistance.

8 . The method according to claim 6 , wherein the indication information being received based on the second resource and the third resource overlapping comprises:

the indication information being received based on the second resource and the third resource overlapping, and wherein a reference signal received power (RSRP) measurement value on a fourth resource is greater than an RSRP measurement value on the first resource.

9 . The method according to claim 6 , wherein an index of the third sequence meets:

(

P

ID

+

M

ID

)

⁢

mod

⁢

R

PRB

,

CS

PSFCH

,

P ID is a physical layer source address identifier carried in the control information, M ID is an identifier of the indication information, and

R

PRB

,

CS

PSFCH

is a quantity of sequences that are able to be transmitted on the feedback resource in the second feedback resource set.

10 . A communications apparatus, comprising:

one or more processors; and

a memory;

wherein the memory stores a computer program, and when executing the computer program stored in the memory, the one or more processors execute operations comprising:

receiving control information from a first terminal, wherein the control information indicates a first resource and a second resource, the first resource carries first data corresponding to the control information, and the second resource is a sending resource reserved by the first terminal;

determining that the second resource meets a reselection condition, wherein determining that the second resource meets the reselection condition comprises:

determining that the second resource and a third resource overlap, and a priority of the third resource is higher than a priority of the second resource, and wherein the third resource is a sending resource reserved by a second terminal; and

sending indication information to the first terminal, wherein the indication information indicates to reselect the second resource, and wherein the indication information is a third sequence, and the third sequence is sent on a feedback resource in a second feedback resource set, wherein the second feedback resource set is different from a first feedback resource set, a feedback resource in the first feedback resource set is used to send a first sequence and a second sequence, the first sequence is used to carry an acknowledgment (ACK) corresponding to the first resource, and the second sequence is used to carry a negative acknowledgment (NACK) corresponding to the first resource.

11 . The apparatus according to claim 10 , wherein:

the control information comprises resource reselection trigger information, and the resource reselection trigger information triggers resource reselection assistance.

12 . The apparatus according to claim 10 , wherein when executing the computer program stored in the memory, the one or more processors execute operations further comprising:

receiving resource reselection enabling information, wherein the resource reselection enabling information enables resource reselection assistance.

13 . The communications apparatus according to claim 10 , wherein determining that the second resource meets the reselection condition comprises:

determining that the second resource and the third resource overlap, wherein a reference signal received power (RSRP) measurement value on a fourth resource is greater than an RSRP measurement value on the first resource.

14 . The apparatus according to claim 10 , wherein an index of the third sequence meets:

(

P

ID

+

M

ID

)

⁢

mod

⁢

R

PRB

,

CS

PSFCH

,

P ID is a physical layer source address identifier carried in the control information, M ID is an identifier of the indication information, and

R

PRB

,

CS

PSFCH

is a quantity of sequences that are able to be transmitted on the feedback resource in the second feedback resource set.

15 . A communications apparatus, comprising:

one or more processors; and

a memory, wherein the memory stores a computer program, and when executing the computer program stored in the memory, the one or more processors execute operations comprising:

sending control information to a third terminal, wherein the control information indicates a first resource and a second resource, the first resource carries first data corresponding to the control information, and the second resource is a sending resource reserved by a first terminal;

receiving indication information sent by the third terminal, wherein the indication information indicates to reselect the second resource, the indication information being received based on the second resource and a third resource overlapping, and a priority of the third resource being higher than a priority of the second resource, and wherein the third resource is a sending resource reserved by a second terminal; and

performing resource reselection on the second resource; and

wherein the indication information is a third sequence, and the third sequence is received on a feedback resource in a second feedback resource set, wherein the second feedback resource set is different from a first feedback resource set, a feedback resource in the first feedback resource set is used to send a first sequence and a second sequence, the first sequence is used to carry an acknowledgment (ACK) corresponding to the first resource, and the second sequence is used to carry a negative acknowledgment (NACK) corresponding to the first resource.

16 . The communications apparatus according to claim 15 , wherein the control information further comprises resource reselection trigger information, and the resource reselection trigger information triggers the third terminal to perform resource reselection assistance.

17 . The communications apparatus according to claim 15 , wherein the indication information being received based on the second resource and the third resource overlapping comprises:

the indication information being received based on the second resource and the third resource overlapping, and wherein a reference signal received power (RSRP) measurement value on a fourth resource is greater than an RSRP measurement value on the first resource.

18 . The apparatus according to claim 15 , wherein an index of the third sequence meets:

(

P

ID

+

M

ID

)

⁢

mod

⁢

R

PRB

,

CS

PSFCH

,

P ID is a physical layer source address identifier carried in the control information, M ID is an identifier of the indication information, and

R

PRB

,

CS

PSFCH

is a quantity of sequences that are able to be transmitted on the feedback resource in the second feedback resource set.