US 2016/0112181 A1 · Adaptive HARQ for Half Duplex Operation for Battery and Antenna Constrained Devices

Abstract

A user equipment (UE) implements improved communication methods which enable uplink (UL) transmissions consistent with an UL timeline. The UE may have a transmit duty cycle and may transmit acknowledge/negative acknowledge messages to a base station according to the transmit duty cycle. Additionally, the UE may be configured to determine signal-to-interference-plus noise ratio (SINR) between the UE and the base station and compare SINR to a threshold. The UE may transmit redundancy versions of data in consecutive sub-frames with a duty cycle of two transmissions per X+1 sub-frames if SINR is equal or above the threshold and redundancy versions using a duty cycle of one transmission per X sub-frames if SINR is below the threshold. Further, the UE may be configured to communicate a number of UL HARQ processes supported by the UE, receive first information in a first sub-frame, and send second information X sub-frames after the first sub-frame.

Claims20

Dependent claims

A user equipment device (UE), comprising:

at least one antenna;
at least one radio, wherein the at least one radio is configured to perform cellular communication using at least one radio access technology (RAT);
one or more processors coupled to the at least one radio, wherein the one or more processors and the at least one radio are configured to perform voice and/or data communications;
wherein the UE is configured to:
communicate, to a base station, a number of uplink (UL) hybrid automatic repeat request (HARQ) processes supported by the UE;
receive first information from the base station in at least a first sub-frame, wherein the first information corresponds to at least a first downlink (DL) HARQ process, wherein a number of DL HARQ processes depends upon the number of UL HARQ processes;
and
send second information to the base station X sub-frames after the first sub-frame, wherein the second information comprises a first ACK/NACK associated with the first DL HARQ process.

5 more elements

A non-transitory computer readable memory medium storing program instructions executable by at least one processor of a user equipment device (UE) to:

determine signal-to-interference-plus noise ratio (SINR) for a channel between the UE and a base station;
and
compare the SINR to a threshold,
wherein if the SINR is greater than or equal to the threshold,
transmit, in consecutive sub-frames, a first version and a second version of user data, wherein the UE has a transmit duty cycle of X sub-frames;
and
transmit, in consecutive sub-frames, a third version and a fourth version of user data, wherein transmission of the third version occurs X+1 sub-frames after transmission of the first version;
and
wherein if the SINR is less than the threshold,
transmit the first version of the user data in a first sub-frame;
and
transmit the second version of the user data in a second sub-frame, wherein the second sub-frame occurs X sub-frames after the first sub-frame.

9 more elements

Dependencies are inferred from the claim text.

Adaptive HARQ for Half Duplex Operation for Battery and Antenna Constrained Devices

Life of this patent

Adaptive HARQ for Half Duplex Operation for Battery and Antenna Constrained Devices

Life of this patent

Abstract

Claims20