Impact of decentralized congestion control on contention-based forwarding in VANETs
| Autor: | Sebastian Kuhlmorgen, Andreas Festag, Gerhard Fettweis |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Hardware_MEMORYSTRUCTURES
Vehicular ad hoc network Computer science business.industry Wireless ad hoc network Node (networking) Reliability (computer networking) ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS 020206 networking & telecommunications 020302 automobile design & engineering 02 engineering and technology Network congestion Protocol stack 0203 mechanical engineering 0202 electrical engineering electronic engineering information engineering Latency (engineering) business Computer network Communication channel |
| Zdroj: | WoWMoM |
| DOI: | 10.1109/wowmom.2016.7523572 |
| Popis: | Vehicular ad hoc networks based on IEEE 802.11 OCB suffer from channel congestion, which will be critical for safety applications when the channel becomes saturated. Therefore, decentralized congestion control (DCC) is needed that keeps the channel load under a pre-defined threshold. In the European system for vehicular communication, a DCC-gatekeeper has been inserted into the protocol stack that reduces the data traffic generated or forwarded by the vehicle. This DCC-gatekeeper affects the functionality of the contention-based forwarding (CBF) and degrades its performance. In this paper we evaluate the performance of CBF under congestion-free and saturated channel conditions for several protocol variants: DCF, EDCA and DCC-gatekeeper. The results show that the standard DCC-gatekeeper hampers the functionality of CBF even for small node densities. We enhance the DCC-gatekeeper-based approach to overcome this issue and evaluate the protocol variants in terms of reliability, latency and channel load in a freeway scenario with realistic trace-based mobility. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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