US Patent No. 10,798,750

COMMUNICATION SYSTEM


Patent No. 10,798,750
Issue Date October 06, 2020
Title Communication System
Inventorship Chadi Khirallah, Epsom (GB)
Vivek Sharma, Sutton (GB)
Yassin Aden Awad, Uxbridge (GB)
Robert Arnott, London (GB)
Assignee NEC CORPORATION, Minato-ku, Tokyo (JP)

Claim of US Patent No. 10,798,750

1. A communication device for a communication system, the communication device comprising:a transceiver adapted to communicate with communication apparatus that operates a cell within which the communication device is located, wherein the cell is operated as a licensed assisted access, LAA, cell and has an associated physical uplink control channel, PUCCH, wherein the LAA cell is operated as LAA secondary cell, LAA SCell that is subjected to a listen-before-talk (LBT) requirement; and
a controller adapted:
to generate at least one uplink control signal for transmitting to said communication apparatus;
to perform a clear channel assessment, CCA, in accordance with an associated LBT requirement, on said PUCCH before said at least one uplink control signal is transmitted; and
to block transmission of said at least one uplink control signal on said PUCCH when said CCA indicates that a channel is not clear;
wherein the transceiver is further adapted, when said controller has not blocked said transmission of said at least one uplink control signal, to transmit said at least one uplink control signal to said communication apparatus in said PUCCH, and
wherein the transceiver is further configured to transmit, to the communication apparatus, a number of uplink control signals blocked by the LBT.