Adaptive link selection in buffer-aided relaying with statistical QoS constraints

Khoa T. Phan, Tho Le-Ngoc

Research output: Chapter in Book/Report/Conference proceedingConference PaperOtherpeer-review

4 Citations (Scopus)


This paper considers a 3-node buffer-aided relaying network with statistical delay quality-of-service (QoS) constraints imposed at the source and relay. To exploit the relay buffering capability and link fading diversity, an adaptive link selection relaying scheme is proposed. In a time slot, the relay (R) can adaptively select to receive from the source (S) or to transmit to the destination (D) based on the instantaneous conditions of the S-R and R-D links. The selection scheme aims to maximize the constant supportable arrival rate to the source, i.e., the effective capacity in consideration of the link fading distributions and the average signal-to-noise power ratios (SNRs) as well as the QoS constraints. We compare the capacities of the adaptive relaying and the fixed relaying where the relay employs fixed transmission and reception schedule, demonstrating the gain of the former, especially under loose QoS constraints. The capacities of the buffer-aided relaying and non-buffer relaying under similar end-to-end delay QoS constraint are also compared, showing the benefits of using buffer-aided relaying to support delay-sensitive applications.

Original languageEnglish
Title of host publication2015 IEEE International Conference on Communications, ICC 2015
PublisherIEEE, Institute of Electrical and Electronics Engineers
Number of pages6
ISBN (Electronic)9781467364324
Publication statusPublished - 9 Sept 2015
Externally publishedYes
EventIEEE International Conference on Communications 2015: Smart City & Smart World - London, United Kingdom
Duration: 8 Jun 201512 Jun 2015 (Website) (IEEE Conference proceedings)


ConferenceIEEE International Conference on Communications 2015
Abbreviated titleICC 2015
Country/TerritoryUnited Kingdom
Other2015 IEEE International Conference on Communications (ICC2015), held in the magnificent city of London, the UK’s capital. ICC2015 will be an excellent presentation, networking and publicity event, offering the opportunity for researchers, engineers and business people to meet and exchange ideas and information. In addition to the traditional keynote, symposium, workshop, tutorial and industry forum sessions, this year we are offering a new event – Chief Technology Officer Forum - during the plenary session. Here, the future of mobile networks will be discussed.
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  • adaptive link selection
  • Buffer-aided relaying
  • effective capacity
  • statistical QoS constraints

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