Cross-layer combining of queuing with adaptive modulation and coding over wireless links

Qingwen Liu, Shengli Zhou, Georgios B Giannakis

Research output: Contribution to conferencePaperpeer-review

20 Scopus citations

Abstract

Assuming there are always sufficient data waiting to be transmitted, adaptive modulation and coding (AMC) at the physical layer have been traditionally designed separately from higher layers. However, this assumption is not always valid when queuing effects are taken into account at the data link layer. In this paper, we analyze the performance of a wireless system with finite-length queuing and AMC. We characterize the queuing service process induced by AMC, and derive the recursion of the queue state. We then construct a finite state Markov chain (FSMC) with a state pair containing both the queue and the queue server state, and compute its stationary distribution. The latter enables us to derive closed-form expressions for the packet loss rate and the average throughput. Guided by our performance analysis, we also introduce a cross-layer design, which optimizes the target packet error rate in AMC at the physical layer, to minimize the packet loss rate and maximize the average throughput, when combined with a finite-length queue at the data link layer.

Original languageEnglish (US)
Pages717-722
Number of pages6
StatePublished - Dec 1 2003
EventMILCOM 2003 - 2003 IEEE Military Communications Conference - Monterey, CA, United States
Duration: Oct 13 2003Oct 16 2003

Other

OtherMILCOM 2003 - 2003 IEEE Military Communications Conference
CountryUnited States
CityMonterey, CA
Period10/13/0310/16/03

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