The Challenge of a Future Slotted Standard for Vehicular Ad-Hoc Networks
نویسندگان
چکیده
This chapter is about alternative MAC solutions for VANETs, based on a synchronous, slotted philosophy. After highlighting the limitation of the incumbent CSMA/CA solution, the chapter explains the rationale for a slotted standard and briefly introduces the three solutions found in literature (namely MS-Aloha, D-TDMA and STDMA). In particular, one of them, MS-Aloha, seems particularly rich in functionalities and solves several open issues, in particular in terms of scalability. Its characteristics are presented and discussed, also by means of simulations and quantitative metrics. The comparative analysis between CSMA/CA and MS-Aloha performances permits to gain a deeper insight and draw conclusions on possible perspectives.
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