US Patent No. 10,925,117

METHOD AND APPARATUS FOR TRANSMITTING RRC MESSAGE


Patent No. 10,925,117
Issue Date February 16, 2021
Title Method And Apparatus For Transmitting Rrc Message
Inventorship Xiaowei Jiang, Beijing (CN)
Assignee Beijing Xiaomi Mobile Software Co., Ltd., Beijing (CN)

Claim of US Patent No. 10,925,117

1. An apparatus for transmitting a Radio Resource Control (RRC) message, wherein the apparatus is applied in a communication system in which a plurality of connections are established between a terminal and an access network device, the apparatus comprising:one or more processors;
and a memory non-transitory computer-readable storage medium storing instructions executable by the one or more processors;
wherein the one or more processors are configured to:
receive RRC diversity configuration information sent by the access network device, wherein the RRC diversity configuration information is configuration information required when the terminal enables or disables RRC diversity, and wherein the RRC diversity configuration information comprises an enable indication and a diversity threshold;
determine whether to enable the RRC diversity according to the RRC diversity configuration information, wherein the RRC diversity is a way of transmitting identical uplink RRC messages through at least two connections;
wherein the one or more processors configured to determine whether to enable the RRC diversity according to the RRC diversity configuration information are further configured to:
enable the RRC diversity according to the enable indication; and
determine, according to the diversity threshold, connections for transmitting the uplink RRC messages;
wherein the access network device comprises a central unit and at least two Distribution Units (DUs) in a 5G communication system and the at least two DUs are connected to the central unit via optical fibers; the diversity threshold comprises a first diversity threshold; the RRC diversity configuration information further comprises a DU list comprising identifiers of DUs that support RRC diversity; and
wherein the one or more processors configured to determine, according to the diversity threshold, connections for transmitting the uplink RRC messages are further configured to:
detect whether downlink channel quality of a first DU is lower than the first diversity threshold, wherein the first DU is a DU that a primary serving cell corresponds to when the terminal establishes an initial connection;
when the downlink channel quality of the first DU is lower than the first diversity threshold, determine at least one of second DUs as a target DU, or determine the first DU and the at least one of second DUs as target DUs, wherein the second DUs are DUs that the DU identifiers in the DU list correspond to; and
select at least two connections supporting the RRC diversity between the terminal and the target DUs as connections for transmitting the uplink RRC messages.