SRB transmission method and device

A signaling radio bearer (SRB) transmission device, comprising:

• one or more processors;
• a memory;
• and
• one or more programs stored in the memory, wherein the one or more processors, when executing the one or more programs, are configured to:
• apply, according to configuration, radio link control (RLC) layer unacknowledged (UM) mode for all or part of SRB data, wherein the SRB data includes SRB0, SRB1, and SRB2, SRB0 is used for transmitting RRC messages transmitted on a logical channel CCCH, SRB1 is used for transmitting RRC messages transmitted on a logical channel DCCH, and SRB2 is used for transmitting NAS messages transmitted on the logical channel DCCH,
• wherein the one or more processors are further configured to:
• indicate, at a radio resource control (RRC) layer, the SRB data applying the RLC layer UM mode by filling, in a packet header of the SRB data, identification information on applying the RLC layer UM mode, and transfer the identification information to a RLC layer via a packet data convergence protocol (PDCP) layer,
• determine, at the PDCP layer, that the SRB data needs to apply the RLC layer UM mode according to the identification information carried in the packet header of the SRB data, and
• perform, at the PDCP layer, UM encapsulation and repeated transmission on the SRB data applying the RLC layer UM mode,
• wherein a number of the repeated transmission, information on starting the repeated transmission or deduplication process, or information on stopping the repeated transmission or deduplication process is configured by a base station.

A non-transitory computer readable storage medium storing a plurality of computer-executable instructions that, when executed by one or more processors, cause the one or more processors to:

• apply, according to configuration, radio link control (RLC) layer unacknowledged (UM) mode for all or part of SRB data, wherein the SRB data includes SRB0, SRB1, and SRB2, SRB0 is used for transmitting RRC messages transmitted on a logical channel CCCH, SRB1 is used for transmitting RRC messages transmitted on a logical channel DCCH, and SRB2 is used for transmitting NAS messages transmitted on the logical channel DCCH,
• wherein computer-executable instructions further cause the one or more processors to:
• indicate, at a radio resource control (RRC) layer, the SRB data applying the RLC layer UM mode by filling, in a packet header of the SRB data, identification information on applying the RLC layer UM mode, and transfer the identification information to a RLC layer via a packet data convergence protocol (PDCP) layer,
• determine, at the PDCP layer, that the SRB data needs to apply the RLC layer UM mode according to the identification information carried in the packet header of the SRB data, and
• perform, at the PDCP layer, UM encapsulation and repeated transmission on the SRB data applying the RLC layer UM mode,
• wherein a number of the repeated transmission, information on starting the repeated transmission or deduplication process, or information on stopping the repeated transmission or deduplication process is configured by a base station.