Region-based clustering mechanism for channel access in vehicular Ad Hoc networks
US8488545B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 2011 |
| Grant date | Jul 16, 2013 |
| Priority date | — |
| Expiry date | Feb 10, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/18
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a Vehicular Ad Hoc Network (VANET) a hybrid method combines SDMA (Space Division Multiple Access) and dynamic TDMA (Time Division Multiple Access) that divides the roadway into regions (whose size is larger than the SDMA unit) where each region is allocated a pool of radio channels based on SDMA and may contain a limited number of vehicles. Vehicles within the same region compete for and access the channels using dynamic TDMA. A channel allocation scheme that maps the pool of channels to the regions such that when a vehicle acquires multiple channels (time slots) in a region, the intervals among the channels are as uniform as possible, thus minimizing the waiting time of the messages to be broadcast by the vehicle, which is critical for safety related applications. This solution is referred to as R-SDMA (Region based SDMA).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.