发明名称 |
COLLISION AVOIDANCE SCHEME FOR WIRELESS COMMUNICATIONS OVER UNLICENSED SPECTRUM |
摘要 |
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. |
申请公布号 |
US2014341135(A1) |
申请公布日期 |
2014.11.20 |
申请号 |
US201414281629 |
申请日期 |
2014.05.19 |
申请人 |
QUALCOMM Incoporated |
发明人 |
Bhushan Naga;Malladi Durga Prasad;Wei Yongbin;Gaal Peter;Luo Tao;Ji Tingfang;Horn Gavin Bernard;Chen Wanshi;Damnjanovic Aleksandar |
分类号 |
H04W74/08;H04W72/04 |
主分类号 |
H04W74/08 |
代理机构 |
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代理人 |
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主权项 |
1. A method for wireless communications, comprising:
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. |
地址 |
San Diego CA US |