Buffer Status Report and Logical Channel Prioritization for Dual Connectivity

摘要

Apparatus and methods are provided to enhance BSR and LCP procedures for the dual connectivity system. In one novel aspect, the BSR is handled for each MAC entity according to one or more allocation rules. In one embodiment, the allocation rule is configured by the network. In another embodiment, the allocation rule is determined by the UE based on historic statics. In yet another embodiment, the allocation rule is determined by the UE based on information from the network. In one embodiment, the allocation rule indicates percentage of traffic allocated to each MAC entity. In another novel aspect, LCP is performed independently for each MAC entity if the split bearer is configured and the prioritized bit rate (PBR) and the bucket size duration (BSD) are signaled for each eNB. In one embodiment, separate sets of LCG variables are maintained independently for each MAC entity.

主权项

1. A method comprising:
configuring a macro cell group (MCG) by a user equipment (UE) in a wireless network, wherein the MCG is served by a first MAC entity including serving cells associating with a macro base station; configuring a secondary cell group (SCG) served by a second MAC entity of the UE, wherein the SCG includes serving cells associating with a secondary base station; determining an amount of available data for transmission; and calculating a MCG buffer status value for the first MAC entity and a SCG buffer status value for the second MAC based on an allocation rule and the determined amount of available data for transmission.