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In this paper, the authors consider the problem of transmission delay in terms of finite coding length derived from the random coding bound for different cooperative protocols. Specifically, they first study the impact of cooperative transmission on the routing decision for wireless ad-hoc networks, where a routing optimization problem is formulated to minimize the end-to-end delay that ensures a satisfactory error performance. The closed-expression of the optimal solution is developed through the optimization problem and later used as quantitative criterion of routing decision.
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