A Simple but Effective Congestion Control Scheme for Safety-Related Events in VANET

Chen CHEN  Qingqi PEI  Xiaoji LI  Rong SUN  

IEICE TRANSACTIONS on Information and Systems   Vol.E95-D   No.10   pp.2548-2551
Publication Date: 2012/10/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.E95.D.2548
Print ISSN: 0916-8532
Type of Manuscript: LETTER
Category: Computer System
vehicular ad hoc networks,  congestion control,  safety-related,  IEEE802.11p,  

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In this letter, a Simple but Effective Congestion Control scheme (SECC) in VANET has been proposed to guarantee the successful transmissions for safety-related nodes. The strategy derive a Maximum Beacon Load Activity Indicator (MBLAI) to restrain the neighboring general periodical beacon load for the investigated safety-related “observation nodes”, i.e., the nodes associated with some emergent events. This mechanism actually reserves some bandwidth for the safety-related nodes to make them have higher priorities than periodical beacons to access channel. Different from the static congestion control scheme in IEEE802.11p, this strategy could provide dynamic control strength for congestion according to tolerant packets drop ratio for different applications.