Betting on Gilbert-Elliot Channels

被引：22

作者：

Laourine, Amine ^{[1
]}

Tong, Lang ^{[1
]}

机构：

[1] Cornell Univ, Sch Elect & Comp Engn, Ithaca, NY 14853 USA

来源：

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | 2010年 / 9卷 / 02期

关键词：

Gilbert-Elliot channel; Opportunistic channel access; Markov decision processes; OPPORTUNISTIC SPECTRUM ACCESS; FADING CHANNEL; FILE TRANSFER; NETWORKS; ENERGY;

D O I：

10.1109/TWC.2010.02.090055

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this paper a communication system operating over a Gilbert-Elliot channel is studied. The goal of the transmitter is to maximize the number of successfully transmitted bits. This is achieved by choosing among three possible actions: (i) betting aggressively by using a weak code that allows transmission with a high data rate but provides no protection against a bad channel, ii) betting conservatively by using a strong code that perfectly protects the communication against a bad channel but does not allow a high data rate, iii) betting opportunistically by sensing the channel for a fixed duration and then deciding which code to use. The problem is formulated and solved using the theory of Markov decision processes (MDPs). It is shown that the optimal strategy has a simple threshold structure. Closed form expressions and simplified procedures for the computation of the threshold policies in terms of the system parameters are provided.

引用

页码：723 / 733

页数：11

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