Patent ID: 9112906
Filing Date: 2015-08-18
Classification: H04L,H04W

Abstract:
1. A mobile communication device, comprising: a wireless module, performing wireless transceiving to and from a service network; and a processor, determining a Transmission Control Protocol (TCP) or Internet Protocol (IP) window size associated with a Transport layer or Network layer according to a Channel Quality Indicator (CQI) of a downward transmission link from the service network and a Rank Indicator (RI) used for Multiple-Input Multiple-Output (MIMO) associated with a Physical layer, detecting a transfer failure rate for data transmission using the TCP or IP window size via the wireless module, and reducing the TCP or IP window size by a predetermined ratio in response to the transfer failure rate being higher than a predetermined threshold, wherein the Transport layer or Network layer is hierarchically higher than the Physical layer in a multi-layer protocol stack, wherein the TCP or IP window size is determined by: wherein the MaxTCPWindowSize represents a maximum TCP or IP window size, the MinTCPWindowSize represents a minimum TCP or IP window size, the CQI_Indexed_TBS represents a Transport Block Size (TBS) corresponding to a currently measured CQI, the MAX_CQI_TBS represents another TBS corresponding to a maximum CQI, and the Weight represents a constant or a weighting function of the currently measured CQI.