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Conference Paper
Centralized TDMA MAC for advanced ITS applications
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- Authors
- Hyunkyun Choi, Dongyong Kwak, Hanbyeog Cho, Youn-Seon Jang
- Issue Date
- 2012-10
- Citation
- ITS World Congress 2012, pp.1-8
- Language
- English
- Type
- Conference Paper
- Abstract
- Currently, the vehicular communications are used for advanced vehicle safety applications like as cooperative intersection safety. These applications need high reliability and predictable delay in vehicular communications. The CSMA (Carrier Sense Multiple Access) mechanism is not suitable for advanced vehicle safety applications because the communication delay and communication failure rate increase exponentially with the number of communication devices.In addition, CSMA causes unfairness between users as the network load increase. In this paper, we propose the Centralized TDMA (Time Division Multiple Access) MAC (Medium Access Control) protocol which has a central controller assigning time slots for the reliability and fairness. In addition, we present the implementation by the software and show the test result of the average delay.
- KSP Keywords
- Average delay, Central controller(CC), Communication device, Failure Rate, High Reliability, Intersection Safety(ISS), Load increase, Medium Access Control, Network load, Safety applications, TDMA MAC