Call admission control for Wi-Fi
US8374622B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 12, 2007 |
| Grant date | Feb 12, 2013 |
| Priority date | — |
| Expiry date | Dec 12, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W36/26
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Call admission control within a wireless network is implemented using a service controller that manages a set of access points. The call admission control (CAC) function for a given access point determines whether the access point has sufficient unused bandwidth to handle an additional call. The service controller makes this determination by monitoring the access points and evaluating certain probability functions and load conditions. In one embodiment, a determination of whether the access point has sufficient unused bandwidth to handle an additional call is a function of two (2) independent probabilities: (i) a probability of an active session moving to the access point from one or more neighbor access points, and (ii) a probability of an idle mobile device already associated with the access point entering into a new active session by initiating an inbound or outbound call. According to another aspect, the service controller issues and manages “call admission credits” among the set of access points, where a call admission credit value indicates a number of calls that idle mobile devices associated with the access point may initiate from the AP. The call admission credits value is…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.