Throughput-Delay Tradeoff in Coupled Queues in Wireless Networks: Priority and Concurrent Transmissions Regimes

Autor(es)

Bergamo, Rubem Toledo ^[1] ; Dester, Plinio Santini ^[2] ; Cardieri, Paulo ^[2]

Afiliação do(s) autor(es)

^[1] Fed Inst Educ Sci & Technol Santa Catarina MSC, BR-88103902 Sao Jose - Brazil

^[2] Univ Estadual Campinas, Sch Elect & Comp Engn, BR-13083970 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS; v. 20, n. 8, p. 5423-5433, AUG 2021.
• Citações Web of Science: 0

Resumo

This paper investigates the performance of a wireless network that consists of two pairs of transmitter-receiver sharing the same channel, modeled using two coupled queues. In this analysis, we use the power metric P, defined as the ratio of throughput and mean delay, to understand the compromise between these two metrics. We show that, when the users' transmit power levels are adjusted to maximize P, two transmission regimes emerge. When the coupling degree between the queues is strong, but the traffic is not heavy, there will be plenty of opportunities for non-concurrent transmissions. Our analysis shows that, in this case, the best strategy is to prioritize one user over the other through appropriate transmit powers adjustment and to use the highest modulation order available. On the other hand, for heavy traffic, none of the users should be prioritized, and there is an optimum combination of robust modulation orders and transmit power ratio to achieve the best performance. (AU)

• Processo FAPESP: 17/21347-0 - Interferência e atraso em redes de comunicação com tráfego espaço-temporal
• Beneficiário: Plínio Santini Dester
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto