EPHICH FOR LTE NETWORKS WITH UNLICENSED SPECTRUM

摘要

An enhanced acknowledgement indicator channel is discussed that multiplexes acknowledgement signals for multiple uplink signals from various user equipments (UEs) into the enhanced acknowledgement indicator channel. The channel is divided into a number of paired data and pilot resource element groups that can be precoded independently of one another, such that each paired resource element group is precoded using a different or independent precoding than the other paired resource element groups. If the base station determines a failure to decode any uplink signals, instead of sending acknowledgement signals over the indicator channel, the base station may, instead, generate uplink grants for retransmission of the uplink signals.

主权项

1. A method of wireless communication, comprising:
generating a plurality of acknowledgment signals, wherein each of the plurality of acknowledgement signals corresponds to status of a plurality of uplink signals; multiplexing the plurality of acknowledgement signals into an acknowledgment indicator channel, wherein the acknowledgement indicator channel includes a plurality of data resource element groups and a plurality of pilot resource element groups paired with the plurality of data resource element groups; precoding one or more data resource element groups of the plurality of data resource element groups and one or more corresponding pilot resource element groups corresponding of the plurality of pilot resource element groups independently from others of the plurality of data resource element groups and plurality of pilot resource element groups, wherein the one or more data resource element groups and the one or more corresponding pilot resource element groups are precoded with a same precoding; and transmitting the acknowledgment indicator channel.