Resource reselection assistance method and apparatus and resource reselection method and apparatus
A third terminal receives control information from a first terminal, where 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; the third terminal determines that the second resource meets a reselection condition; and the third terminal sends indication information to the first terminal, where the indication information indicates to reselect the second resource. When determining that a resource conflict exists in the second resource, the third terminal can indicate the first terminal in time to reselect the second resource, to prevent the first terminal from continuing to use the second resource to send data.
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.