Link failure recovery method and related device
In the method, a terminal device may send first indication information on a first uplink resource based on information about a spatial relation parameter, to indicate that a link failure occurs in a i th cell in N second cells. The information about the spatial relation parameter is information about a spatial relation parameter used to send a channel and/or a signal of a first cell, and the first uplink resource is an uplink resource of the first cell. Therefore, the network device does not need to configure a plurality of uplink resources that are associated with a plurality of reference signal resources of a second cell and that are used to indicate that a link failure occurs in the second cell, thereby reducing resource overheads.
1. A method, comprising:
sending, by a terminal device, first indication information on a first uplink resource, wherein the first indication information indicates that in N second cells there is at least one cell in which a link failure occurs, wherein N is an integer greater than or equal to 1, and wherein the first uplink resource is an uplink resource of a first cell;
receiving, by the terminal device, first signaling that indicates a third uplink resource; and
sending, by the terminal device, second indication information on the third uplink resource, wherein the second indication information indicates at least one of following:
identification information of a i th cell in which a link failure occurs in the N second cells, third reference signal information, or fourth reference signal information;
wherein the third reference signal information is information about a reference signal whose channel quality is greater than or equal to a first threshold, and the fourth reference signal information is information about a reference signal whose channel quality is less than or equal to a second threshold;
wherein the first uplink resource is a physical random access channel (PRACH) resource in a second uplink resource set or a physical uplink control channel (PUCCH) resource in the second uplink resource set, and the second uplink resource set is a set of M PRACH resources or a set of M PUCCH resources that are configured for the N second cells on the uplink resource of the first cell and that are used to send link failure recovery request information;
wherein N is greater than M, and one PRACH resource in the second uplink resource set or one PUCCH resource in the second uplink resource set corresponds to one of P second cell groups, wherein the N second cells comprise the P second cell groups, and one second cell group comprises one or more second cells, wherein P is an integer greater than or equal to 1 and less than N; and
wherein the first uplink resource is a PRACH resource that is in the second uplink resource set and that corresponds to a second cell group to which a i th cell belongs, or the first uplink resource is a PUCCH resource that is in the second uplink resource set and that corresponds to a second cell group to which a i th cell belongs.
2. The method according to claim 1 , wherein the sending, by the terminal device, the first indication information on the first uplink resource comprises:
sending, by the terminal device, the first indication information on the first uplink resource based on information about a spatial relation parameter, wherein the information about the spatial relation parameter is information about a spatial relation parameter used to send or receive a channel or a signal of the first cell.
3. The method according to claim 1 , wherein the first uplink resource is a physical uplink control channel (PUCCH) resource that is configured on the uplink resource of the first cell and that is used to send link failure recovery request information of the N second cells.
4. The method according to claim 1 , wherein the third uplink resource is a physical uplink shared channel (PUSCH) resource or a physical random access channel (PRACH) resource.
5. An apparatus, comprising:
a transceiver, configured to:
send first indication information on a first uplink resource, wherein the first indication information indicates that in N second cells there is at least one cell in which a link failure occurs, wherein N is an integer greater than or equal to 1, and wherein the first uplink resource is an uplink resource of a first cell;
receive first signaling that indicates a third uplink resource; and
send second indication information on the third uplink resource, wherein the second indication information indicates at least one of following: identification information of a cell in which a link failure occurs in the N second cells, third reference signal information, or fourth reference signal information;
wherein the third reference signal information is information about a reference signal whose channel quality is greater than or equal to a first threshold, and the fourth reference signal information is information about a reference signal whose channel quality is less than or equal to a second threshold;
wherein the first uplink resource is a PRACH resource in a second uplink resource set or a PUCCH resource in the second uplink resource set, and the second uplink resource set is a set of M PRACH resources or a set of M PUCCH resources that are configured for the N second cells on the uplink resource of the first cell and that are used to send link failure recovery request information;
wherein N is greater than M, and one PRACH resource in the second uplink resource set or one PUCCH resource in the second uplink resource set corresponds to one of P second cell groups, wherein the N second cells comprise the P second cell groups, and one second cell group comprises one or more second cells, wherein P is an integer greater than or equal to 1 and less than N; and
wherein the first uplink resource is a PRACH resource that is in the second uplink resource set and that corresponds to a second cell group to which a i th cell belongs, or the first uplink resource is a PUCCH resource that is in the second uplink resource set and that corresponds to a second cell group to which a i th cell belongs.
6. The apparatus according to claim 5 , wherein the transceiver is further configured to:
send the first indication information on the first uplink resource based on information about a spatial relation parameter, wherein the information about the spatial relation parameter is information about a spatial relation parameter used to send or receive a channel or a signal of the first cell.
7. The apparatus according to claim 5 , wherein the first uplink resource is a physical uplink control channel (PUCCH) resource that is configured on the uplink resource of the first cell and that is used to send link failure recovery request information of the N second cells.
8. The apparatus according to claim 5 , wherein the third uplink resource is a physical uplink shared channel (PUSCH) resource or a physical random access channel (PRACH) resource.
9. A method, comprising:
receiving, by a network device, first indication information on a first uplink resource, wherein the first indication information indicates that in N second cells there is at least one cell in which a link failure occurs, wherein N is an integer greater than or equal to 1, and wherein the first uplink resource is an uplink resource of a first cell;
sending, by the network device, first signaling that indicates a third uplink resource;
receiving, by the network device, second indication information on the third uplink resource, wherein the second indication information indicates at least one of following:
identification information of a i th cell, third reference signal information, or fourth reference signal information, wherein the third reference signal information is information about a reference signal whose channel quality is greater than or equal to a first threshold, and the fourth reference signal information is information about a reference signal whose channel quality is less than or equal to a second threshold; and
sending, by the network device, link failure response information based on the first indication information and the second indication information;
wherein the first uplink resource is a PRACH resource in a second uplink resource set or a PUCCH resource in the second uplink resource set, and the second uplink resource set is a set of M PRACH resources or a set of M PUCCH resources that are configured for the N second cells on the uplink resource of the first cell and that are used to send link failure recovery request information, wherein M is an integer greater than or equal to 1 and less than or equal to N;
wherein N is greater than M, and one PRACH resource in the second uplink resource set or one PUCCH resource in the second uplink resource set corresponds to one of P second cell groups, wherein the N second cells comprise the P second cell groups, and one second cell group comprises one or more second cells, wherein P is an integer greater than or equal to 1 and less than N; and
wherein the first uplink resource is a PRACH resource that is in the second uplink resource set and that corresponds to a second cell group to which a i th cell belongs, or the first uplink resource is a PUCCH resource that is in the second uplink resource set and that corresponds to a second cell group to which a i th cell belongs.
10. The method according to claim 9 , wherein the receiving, by the network device, the first indication information on the first uplink resource comprises:
receiving, by the network device, the first indication information on the first uplink resource based on information about a spatial relation parameter, wherein the information about the spatial relation parameter is information about a spatial relation parameter used to send or receive a channel or a signal of the first cell.
11. The method according to claim 9 , wherein the first uplink resource is a physical uplink control channel (PUCCH) resource that is configured on the uplink resource of the first cell and that is used to send link failure recovery request information of the N second cells.
12. An apparatus, comprising:
a transceiver, configured to:
receive first indication information on a first uplink resource, wherein the first indication information indicates that in N second cells there is at least one cell in which a link failure occurs, wherein N is an integer greater than or equal to 1, and wherein the first uplink resource is an uplink resource of a first cell;
send first signaling that indicates a third uplink resource;
receive second indication information on the third uplink resource, wherein the second indication information indicates at least one of following: identification information of a i th cell, third reference signal information, or fourth reference signal information, wherein the third reference signal information is information about a reference signal whose channel quality is greater than or equal to a first threshold, and the fourth reference signal information is information about a reference signal whose channel quality is less than or equal to a second threshold; and
send link failure response information based on the first indication information and the second indication information;
wherein the first uplink resource is a physical random access channel (PRACH) resource in a second uplink resource set or a physical uplink control channel (PUCCH) resource in the second uplink resource set, and the second uplink resource set is a set of M PRACH resources or a set of M PUCCH resources that are configured for the N second cells on the uplink resource of the first cell and that are used to send link failure recovery request information, wherein M is an integer greater than or equal to 1 and less than or equal to N;
wherein N is greater than M, and one PRACH resource in the second uplink resource set or one PUCCH resource in the second uplink resource set corresponds to one of P second cell groups, wherein the N second cells comprise the P second cell groups, and one second cell group comprises one or more second cells, wherein P is an integer greater than or equal to 1 and less than N; and
wherein the first uplink resource is a PRACH resource that is in the second uplink resource set and that corresponds to a second cell group to which a i th cell belongs, or the first uplink resource is a PUCCH resource that is in the second uplink resource set and that corresponds to a second cell group to which a i th cell belongs.