Asynchronous Contention Resolution Diversity ALOHA: Making CRDSA Truly Asynchronous

作者：De Gaudenzi Riccardo^*; Herrero Oscar del Rio; Acar Guray; Barrabes Eloi Garrido

来源：IEEE Transactions on Wireless Communications, 2014, 13(11): 6193-6206.

DOI：10.1109/TWC.2014.2334620

• Satellite communication
• SCADA systems
• multi-access communication
• time division multiple access
• interference suppression

Following the introduction of contention resolution diversity slotted ALOHA (CRDSA), a number of variants of the scheme have been proposed in literature. A major drawback of these slotted random access (RA) schemes is related to the need to keep slot synchronization among all transmitters. The volume of signaling generated to maintain transmitters%26apos; slot synchronization is impractical for large networks. In this paper, we describe in detail asynchronous contention resolution diversity ALOHA (ACRDA), which represents the evolution of the CRDSA RA scheme. ACRDA provides better throughput performance with reduced demodulator complexity and lower transmission latency than its predecessor while allowing truly asynchronous access to the shared medium. The performance of the ACRDA protocol is evaluated via mathematical analysis and computer simulations and is compared with that of CRDSA.

• 出版日期2014-11