Patent ID: 8190959
Filing Date: 2012-05-29
Classification: H04L

Abstract:
1. A wireless communication system for transmitting and receiving a packet between a transmitter and a receiver by an MCW-MIMO system, where a plurality of spatial layers are independently controlled for hybrid automatic re-transmission request (HARQ re-transmission), wherein said receiver has a plurality of antennas for transmitting and receiving a subpacket made by division of said packet, a HARQ control unit, a spatial layer control unit and an ACK generation unit; said transmitter has a plurality of antennas for transmitting and receiving a subpacket made by division of the packet, a HARQ control unit, and a spatial layer control unit; the ACK generation unit of said receiver generates an ACK response for some of the spatial layers, in the case of success in receiving the subpacket transmitted in some of the spatial layers among the packet transmitted in a plurality of spatial layers from said transmitter; the spatial layer control unit of said transmitter decides whether the spatial layer corresponding to the ACK response noticed from said receiver is used or not as a released layer for using in transmission of other subpackets; and said other sub-packets is transmitted and received by using said released layer.