US Patent No. 10,194,462

TRANSMISSION OF UPLINK CONTROL INFORMATION FOR LINK-BUDGET-LIMITED DEVICES


Patent No. 10,194,462
Issue Date January 29, 2019
Title Transmission Of Uplink Control Information For Link-budget-limited Devices
Inventorship Tarik Tabet, Los Gatos, CA (US)
Syed Aon Mujtaba, Santa Clara, CA (US)
Moustafa M. Elsayed, Los Gatos, CA (US)
Assignee Apple Inc., Cupertino, CA (US)

Claim of US Patent No. 10,194,462

1. A base station configured to perform wireless communication with a wireless device, the base station comprising:a radio; and
a processing element operatively coupled to the radio, wherein the radio and the processing element are configured to:
receive a first message comprising a first indication that a user equipment device (UE) is link budget limited, wherein the UE is link budget limited as a result of a hardware limitation of the UE;
send a first uplink grant to the UE in response to the first message, wherein the first uplink grant identifies uplink resources in a physical uplink shared channel (PUSCH) for transmission of first uplink control information;
transmit first coding rate information to the UE in response to the first message, wherein the first coding rate information identifies a first coding rate sufficient to ensure successful decoding of first uplink control information in the PUSCH, wherein the PUSCH supports channel coding with a flexible coding rate, wherein the radio and the processing element are configured to receive second uplink control information on a physical uplink control channel (PUCCH) using a defined coding rate in response to an indication that a UE is not link budget limited, wherein the PUCCH is encoded by using Zadoff-Chu sequences, wherein the first coding rate is lower than the defined coding rate; and
receive the first uplink control information from the UE, wherein the first uplink control information is received in the PUSCH, wherein the first uplink control information is channel coded by the UE, wherein the coding rate of the channel coding applied to the first uplink control information is the first coding rate identified by the first coding rate information.