Systems and methods for multi-connectivity operation

摘要

A method for receiving a radio resource control (RRC) message by a user equipment (UE) is described. The method includes receiving an RRC connection reconfiguration message including secondary cell group (SCG) configuration parameters for SCG addition. In response to receiving the RRC connection reconfiguration message including SCG configuration parameters for SCG addition, the method also includes ordering, by an RRC of the UE, a medium access control (MAC) of the SCG of the UE to initiate a random access procedure.

主权项

1. A method for receiving a radio resource control (RRC) message by a user equipment (UE), comprising:
receiving an RRC connection reconfiguration message including secondary cell group (SCG) configuration parameters for SCG addition, wherein a medium access control (MAC) entity of a master cell group (MCG) and a MAC entity of the SCG are configured for the UE; and in response to receiving the RRC connection reconfiguration message including SCG configuration parameters for SCG addition:
ordering, by an RRC entity of the UE, the MAC entity of the SCG of the MAC entities of the MCG and the SCG of the UE, to initiate a random access procedure, the random access procedure comprising a contention resolution; andconsidering the contention resolution successful, if (i) a cell-radio network temporary identifier (C-RNTI) MAC control element was included in message 3 (Msg. 3); and either (ii) the random access procedure was initiated by a MAC sublayer itself or by the RRC entity and a physical downlink control channel (PDCCH) transmission is addressed to a C-RNTI and contains an uplink (UL) grant for a new transmission; or (iii) the random access procedure was initiated by a PDCCH order and the PDCCH transmission is addressed to the C-RNTI.