Quality of service aware admission control in cognitive device-to-device network

• Published in: Journal of China universities of posts and telecommunications Vol. 18; no. 5; pp. 22 - 29
• Main Authors: FU, Zi-xi, HU, Chun-jing, PENG, Tao, LU, Qian-xi, WANG, Wen-bo
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.10.2011; Wireless Signal Processing and Network Lab, Key Laboratory of Universal Wtreless Communication Ministry of Education,Beijing University of Posts and Telecommunications, Beijing 100876, China
• Subjects: 2D系统; Admission control; Algorithms; Allocations; Cellular; cognitive radio; geometric programming; Mathematical models; Maximization; Optimization; power control; QoS; QoS要求; Sorting; sorting-based algorithm; 准入控制; 感知; 排序算法; 混合动力系统; 网络服务质量; 设备; geometric programming; power control; cognitive radio; sorting-based algorithm; QoS
• ISSN: 1005-8885
• DOI: 10.1016/S1005-8885(10)60098-2

A hybrid system of cellular mode and device-to-device （D2D） mode is considered in this paper, where the cellular resource is reused by the D2D transmission. With the objective of capacity maximization, the power optimization of D2D sub-system is considered, taking into account quality of service （QoS） requirement. The power optimization problem is divided into two stages： The first stage is the admission control scheme design based on the QoS requirement of D2D users, and the second is power allocation to maximize aggregate throughput of admissible D2D users. For the D2D admission control problem, a heuristic sorting-based algorithm is proposed to index the admissible D2D links, where gain to Interference ratio （GIR） sorting criterion is used. Applying an approximate form of Shannon capacity, the power allocation problem can be solved by convex optimization and geometric programming tools efficiently. Based on the theoretical analysis, a practical algorithm is proposed. The precision can reach a trade-off between complexity and performance. Numerical simulation results confirm that combining with GIR sorting method, the proposed scheme can significantly improve the D2D system＇s capacity and fairness.