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Delay-optimal static relaying policy in a slotted aloha wireless network

Vaezi, K ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1109/IWCIT.2018.8405045
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2018
  4. Abstract:
  5. We consider a slotted Aloha-based wireless communication network comprising a source and an active relay, both transmitting to a common destination. The relay node is able to relay the unsuccessfully transmitted packets of the source node, if it can detect them. We find the analytical closed form optimal static relaying policy in order to minimize the average transmission delay (ATD) of source packets, while ATD of its own packets is constrained. A static relaying policy is determined by acceptance and relaying probabilities of the relay node. According to acceptance probability, the relay node decides whether to accept an unsuccessfully transmitted packet from source or not, while the relaying probability determines whether to send a packet of source or send its own packet. We show that when the successful transmission rate to destination is higher at the source node, the optimal policy is to reject all the source packets. Furthermore, we demonstrate that ATD of the relay node does not increase by more than 100% when optimal policy is applied. © 2018 IEEE
  6. Keywords:
  7. Probability ; Wireless networks ; Wireless telecommunication systems ; Average transmission delays ; Closed form ; Delay-optimal ; Optimal policies ; Slotted Aloha ; Source nodes ; Transmission rates ; Wireless communication network ; Information theory
  8. Source: 2018 Iran Workshop on Communication and Information Theory, IWCIT 2018, 25 April 2018 through 26 April 2018 ; 2018 , Pages 1-6 ; 9781538641491 (ISBN)
  9. URL: https://ieeexplore.ieee.org/document/8405045