Invention Grant
- Patent Title: License assisted access communication with dynamic use of request-to-send and clear-to-send messages
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Application No.: US16822123Application Date: 2020-03-18
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Publication No.: US11070985B2Publication Date: 2021-07-20
- Inventor: Farouk Belghoul , Lydi Smaini , Tarik Tabet , Syed Aon Mujtaba
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Kowert, Hood, Munyon, Rankin & Goetzel, P.C.
- Main IPC: H04W16/14
- IPC: H04W16/14 ; H04W74/08 ; H04L27/26 ; H04L27/00 ; H04L5/00 ; H04W72/04 ; H04W74/00 ; H04W24/08 ; H04W84/12

Abstract:
This disclosure relates to performing cellular communication in unlicensed spectrum in a manner that accounts for the possible existence of hidden nodes by opportunistically introducing the use of RTS and CTS messages. A listen-before-talk procedure may be performed to determine whether a wireless medium is available. When the listen-before-talk procedure is complete, an amount of time until a next possible start time for communicating in the cellular communication system according to a timing synchronization scheme for the cellular communication system may be determined. The wireless medium may be occupied until the next possible start time for communicating in the cellular communication system in a manner selected based at least in part on the amount of time until the next possible start time for communicating in the cellular communication system. Cellular communication may be performed on the wireless medium at the next possible start time for communicating in the cellular communication system.
Public/Granted literature
- US20200221313A1 License Assisted Access Communication with Dynamic Use of Request-to-Send and Clear-to-Send Messages Public/Granted day:2020-07-09
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