HARQ soft bit buffer partitioning for carrier aggregation

摘要

A method, system and device are provided for partitioning a HARQ soft bit buffer between aggregated carriers as a function of carrier-related weighting factors so that the total number of soft buffer bits are efficiently allocated to obtain a plurality of soft buffer partitions for the plurality of aggregated carriers which are sized based on relative carrier-related weighting factors.

主权项

1. A method for handling hybrid automatic repeat request (HARQ) operations for aggregated carriers comprising:
determining a total number of soft buffer bits of a soft buffer to be partitioned; obtaining a plurality of carrier-dependent weighting factors corresponding respectively to a plurality of aggregated carriers; and partitioning the soft buffer based at least in part on the carrier-dependent weighting factors to obtain a plurality of separate soft buffers for each of the plurality of aggregated carriers, the partitioning comprising selecting a soft buffer partition size based partly on at least one of:NIR,k=[Nsoft(∑m=0Ncarrier-1⁢KMIMO,m⁢Wm·min⁡(MDLHARQ,m,Mlimit,m))/Wk],NIR,k=[NsoftKMIMO,k⁡(∑m=0Ncarrier-1⁢·Wm·min⁡(MDLHARQ,m,Mlimit,m))/Wk],NIR,k=[Nsoft(∑m=0Ncarrier-1⁢KMIMO,m⁢NRB,mDL·min⁡(MDLHARQ,m,Mlimit,m))/NRB,kDL],orNIR,k=[NsoftKMIMO,k⁡(∑m=0Ncarrier-1⁢·NRB,mDL·min⁡(MDLHARQ,m,Mlimit,m))/NRB,kDL], Wherein NIR,k is the soft buffer memory partition size for the kth carrier; Nsoft is the total number of soft buffer bits for a specified UE category; Ncarrier is the total number of aggregated carriers; Wm is a relative carrier-dependent weighting factor for the mth carrier; NRB,mDL is a carrier bandwidth factor indicating the bandwidth of the mth carrier; KMIMO,m is the maximum number of transport blocks for the mth carrier that are transmittable to a user equipment device in one transmission time interval; MDL_HARQ,m is the maximum number of downlink hybrid automatic retransmit request processes for the mth carrier; and Mlimit,m is the configured maximum number of hybrid automatic retransmit request processes for the mth carrier.