TDMA is Optimal for All-Unicast DoF Region of TIM if and only if Topology is Chordal Bipartite
TDMA is Optimal for All-Unicast DoF Region of TIM if and only if Topology is Chordal Bipartite
复制标题
当且仅当拓扑为弦二分时,TDMA 对于 TIM 的全单播 DoF 区域是最佳的
DOI:
10.1109/tit.2018.2795019
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发表时间:
2018
影响因子:
2.5
通讯作者:
Gesbert, David
中科院分区:
文献类型:
--
作者:
Yi, Xinping;Sun, Hua;Jafar, Syed Ali;Gesbert, David
The main result of this paper is that an orthogonal access scheme, such as time division multiple access achieves the all-unicast degrees of freedom (DoF) region of the topological interference management problem if and only if the network topology graph is chordal bipartite, i.e., every cycle that can contain a chord, does contain a chord. The all-unicast DoF region includes the DoF region for any arbitrary choice of a unicast message set, so e.g., the results of Maleki and Jafar on the optimality of orthogonal access for the sum-DoF of one-dimensional convex networks are recovered as a special case. The result is also established for the corresponding topological representation of the index coding problem.
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