Fig. 5From: Structured optimal transmission control in network-coded two-way relay channelsThe optimal action \(a_{1}^{*}\) (left) and \(a_{2}^{*}\) (right) vs. queue states b 1 and b 2 when g 1=1 and g 2=2. p 1=0.1, p 2=0.2, λ=0.05, τ=1, η=2, ξ o =1, and β=0.97. In this case, ξ o <2λ+η+τ. Theorem 4.12 no longer holds. As can be seen, \(a_{1}^{*}\) is not monotonic in b 1 Back to article page