An enhanced MAC protocol to prioritize channel assignment for safety message broadcast in VANET
عنوان مقاله: An enhanced MAC protocol to prioritize channel assignment for safety message broadcast in VANET
شناسه ملی مقاله: JR_IJNAA-12-0_141
منتشر شده در در سال 1400
شناسه ملی مقاله: JR_IJNAA-12-0_141
منتشر شده در در سال 1400
مشخصات نویسندگان مقاله:
- - - ECE PSG College of Technology Coimbatore, India
- - - ECE PSG College of Technology Coimbatore, India
خلاصه مقاله:
- - - ECE PSG College of Technology Coimbatore, India
- - - ECE PSG College of Technology Coimbatore, India
Spectrum shortage in Vehicular Communications has become an area of concern due to the diverse nature of applications served. Though the allocated ۵.۹GHz Dedicated Short Range Communication (DSRC) spectrum for vehicular communication is inefficiently utilized, the problem of congestion creates an impression that there is always a scarcity in the spectrum. The criticality of the issue becomes high when a safety message is unable to access the channel or is dropped due to congestion. This paper proposes an approach to prioritize channel access to safety messages through dynamic spectrum sharing. In case, when a safety message finds all the DSRC sub-channels occupied, then any one of the ongoing non-safety messages is switched over to the adjacent ۵.۸GHz ISM/UNII-۳ band allowing the former to access the DSRC band. The proposed approach shows an increased QoS and reduced channel access delay for safety messages compared to the previous works.
کلمات کلیدی: Channel delay, DSRC, Safety message, Spectrum sharing, VANET
صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/1561521/