Collision mitigation for multicast transmission in wireless local area networks
US8553548B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2008 |
| Grant date | Oct 8, 2013 |
| Priority date | — |
| Expiry date | Aug 6, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W72/30
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are described including determining if a communications medium is idle; determining a time interval for a reservation of said communications medium; multicasting a message for reserving said communications medium; receiving responses to said message for reserving said communications medium; and determining if a number of said received responses compared to an expected number of responses exceeds a value; performing one of initiating pending frame exchanges and multicasting data or management frames during said time interval for said reservation of said communications medium if said comparison exceeds said value; repeating said first determining act if said comparison does not exceed said value. Also described are a method and apparatus including receiving a message for a reservation of a communications medium; determining if said message specifies a receiver of the message in a list of receivers from which a response is requested; determining if said communications medium is idle; determining a time period in which to transmit said response responsive to an order in said list, wherein said list of receivers is one of a reply list of receiver addresses and a c…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.