Patent ID: 11924901
Assignee: BEJING JINGSHI INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A wireless communications apparatus comprising one of: a terminal or a chip used in a terminal, the wireless communications apparatus configured to receive, from a base station, a carrier aggregation service for the terminal, the base station configured to provide the carrier aggregation service by using at least two serving cells, the at least two serving cells comprising a first serving cell and a second serving cell, wherein the wireless communications apparatus comprises:
a transceiver;
at least one processor; and
one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to cause the apparatus to:

detect that downlink communication of the first serving cell fails, and, upon detecting that downlink communication of the first serving cell fails, determine that downlink communication of the second serving cell is normal;
send a communication failure recovery request on an uplink channel of the second serving cell, the communication failure recovery request indicating a request to recover from a downlink communication failure of the first serving cell, wherein the communication failure recovery request comprises an index of the first serving cell and a candidate reference signal resource indication of the first serving cell;
detect a communication failure recovery response on a downlink channel of the second serving cell, the communication failure recovery response indicating a downlink communication resource of the first serving cell;
wherein the terminal selects, from the serving cells in normal communication, a serving cell having the best channel quality of a downlink channel as the second serving cell, if there are a plurality of serving cells in normal communication of the second serving cell.