US 2011/0085502 A1 · BLIND DECODING OF UPLINK CONTROL CHANNELS

Abstract

In 3GPP LTE, the uplink ACK and CQI bits are jointly coded prior to transmission to maintain a low peak to average ratio (PAR) waveform. Further, when data needs to be transmitted, the uplink control channels are multiplexed with data prior to transmission. However, due to errors on downlink (DL) and uplink (UL) assignments, an evolved Base Node (eNB) receiver needs to employ a set of rules to decode the control channels, to minimize the number of blind decoding hypotheses. This innovation describes the rules employed by a receiver to reduce complexity and computational overhead in part by assuming that the UE is responding to grant on the download while providing for combinations in which one or more types of grants are not received. Energy detection in accordance with metrics and normalizing for differing power controls enables selecting the correct combination for decoding.

Claims42

Dependent claims

A method for facilitating decoding across multiple channels in a wireless communication system, comprising:

employing a processor executing computer executable instructions stored on a computer readable storage medium to implement following acts:
transmitting a scheduling event to a served device on a downlink;
receiving an encoded transmission from the served device on one of a plurality of uplink encoded channels;
determining a reduced set of encoded uplink channel possibilities based upon the scheduling event;
and
detecting which of the reduced set of encoded uplink channel possibilities were transmitted.

3 more elements

Dependencies are inferred from the claim text.

Blind decoding of uplink control channels

Life of this patent

Blind decoding of uplink control channels

Life of this patent

Abstract

Claims42