MoMAC: Mobility-Aware and Collision-Avoidance MAC for Safety Applications in VANETs
| Autor: | Hongzi Zhu, Li Ping Qian, Haibo Zhou, Minglu Li, Wenchao Xu, Feng Lyu, Xuemin Shen |
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| Rok vydání: | 2018 |
| Předmět: |
Computer Networks and Communications
Wireless ad hoc network Computer science business.industry ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS Time division multiple access Aerospace Engineering 020206 networking & telecommunications 020302 automobile design & engineering Topology (electrical circuits) Access control 02 engineering and technology 0203 mechanical engineering Transmission (telecommunications) Automotive Engineering 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering business Protocol (object-oriented programming) Collision avoidance Computer network |
| Zdroj: | IEEE Transactions on Vehicular Technology. 67:10590-10602 |
| ISSN: | 1939-9359 0018-9545 |
| Popis: | Time-division multiple access (TDMA) based medium access control (MAC) protocol provides a promising solution to well support delay-sensitive safety applications in vehicular ad hoc networks, since a time-slotted access scheme ensures the transmission within the ultra-low delays. However, due to the varying vehicle mobility, existing TDMA-based MAC protocols may result in collisions of slot assignment when multiple sets of vehicles move together. To avoid slot-assignment collisions, in this paper, we propose a mobility-aware TDMA MAC, named as MoMAC, which can assign every vehicle a time slot according to the underlying road topology and lane distribution on roads with the consideration of vehicles’ mobilities. In MoMAC, different lanes on the same road segment and different road segments at intersections are associated with disjoint time slot sets. In addition, each vehicle broadcasts safety messages together with the time slot occupying information of neighboring vehicles; by updating time slot occupying information of two-hop neighbors (obtained indirectly from one-hop neighbors), vehicles can detect time slot collisions and access a vacant time slot in a fully distributed way. We demonstrate the efficiency of MoMAC through theoretical analysis and extensive simulations; compared with state-of-the-art TDMA MACs, the transmission collisions can be reduced by $59.2\%$ , and the rate of safety message transmissions/receptions can be greatly enhanced. |
| Databáze: | OpenAIRE |
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