Graduate School and Research Center in Digital Sciences

Self organizing TDMA over LTE sidelink

Gallo, Laurent; Härri, Jérôme

Research Report RR-17-329

Self-Organizing TDMA (STDMA) is a distributed channel access algorithm developed for position reporting in maritime and airborne domains. Its reliability, semi-deterministic behavior, and context aware scheduling also made it an attractive option considered by the European Telecommunications Standard Institute (ETSI) for vehicular communications in ITS-G5. In recent times, cellular-based Long Term Evolution (LTE) is arising as a compelling technology to support Vehicle to Everything (V2X) communications. While already providing vertical connectivity via the installed network, standard extensions are being discussed to support horizontal, direct Vehicle to Vehicle (V2V) and Vehicle to Pedestrian (V2P) communications. A dedicated Sidelink (SL) has been defined for the purpose, as opposed to Uplink (UL) and Downlink (DL). In this research report, we propose STDMA as scheduling algorithm for unsupervised, low latency, direct transmissions over SL; we highlight the challenges caused by its channel configuration, and show its performance, which confirms its role as a valuable candidate technology.

Document Bibtex

Title:Self organizing TDMA over LTE sidelink
Keywords:LTE, Long Term Evolution, Sidelink, PC5, V2V, STDMA, Self Organizing TDMA
Department:Communication systems
Eurecom ref:5105
Copyright: © EURECOM. Personal use of this material is permitted. The definitive version of this paper was published in Research Report RR-17-329 and is available at :
Bibtex: @techreport{EURECOM+5105, year = {2017}, title = {{S}elf organizing {TDMA} over {LTE} sidelink}, author = {{G}allo, {L}aurent and {H}{\"a}rri, {J}{\'e}r{\^o}me}, number = {EURECOM+5105}, month = {01}, institution = {Eurecom}, url = {},, }
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