CN105230109A

5G,4G

Title

Clear channel assessment for determining availability of non licensed spectrum for extending lte capacity

Application Number:

CN20148029393

Publication Date:

06-01-2016

Current Assignee:

QUALCOMM INC

Family ID:

51895690

Application Date:

20-05-2014

Declaring Company:

QUALCOMM INC

Publication Country:

US

Priority Date:

20-05-2013

View on Espacenet goto-link

Title

Clear channel assessment for determining availability of non licensed spectrum for extending lte capacity

Application Number:

CN20148029393

Family ID:

51895690

Publication Country:

US

Publication Date:

06-01-2016

Application Date:

20-05-2014

Priority Date:

20-05-2013

Current Assignee:

QUALCOMM INC

Declaring Company:

QUALCOMM INC

View on Espacenet goto-link

Abstract  Abstract

The invention claims wherein an unlicensed spectrum for method and device for long term evolution (LTE) communications. a first method includes performing a clear channel assessment (CCA) to determine the availability of unlicensed spectrum using the unlicensed spectrum to a user equipment (UE) set transmitting a request to send (RTS) signal when the unlicensed spectrum is available is determined and in response to the RTS signal the unlicensed public clear-to-send (CTS) signal and individual CTS signal is received from one or more UEs in the frequency spectrum. the method comprises not transmitting the RTS signal or transmitting V-RTS signal in the licensed spectrum in licensed spectrum the RTS signal or V-RTS signal addressed to the UE and sets together in un-licensed spectrum transmitting CTS-to-signal together with the transmission of the V-RTS signal.

Methods and apparatuses are described in which an unlicensed spectrum is used for Long Term Evolution (LTE) communications. A first method includes performing clear channel assessment (CCA) to determine availability of an unlicensed spectrum transmitting a request-to-send (RTS) signal to a set of user equipments (UEs) using the unlicensed spectrum when a determination is made that the unlicensed spectrum is available and receiving in the unlicensed spectrum a common clear-to-send (CTS) signal and an individual CTS signal from one or more of the UEs in response to the RTS signal. A second method includes transmitting an RTS signal in an unlicensed spectrum or a V-RTS signal in a licensed spectrum addressed to a set of UEs and transmitting a CTS-to-self signal in the unlicensed spectrum along with the transmission of the V-RTS signal.

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