Traffic-Adaptive Spectrum Leasing Between Primary and Secondary Networks
Traffic-Adaptive Spectrum Leasing Between Primary and Secondary Networks
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DOI：
10.1109/tvt.2018.2808279
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发表时间：
2018-02
影响因子：
6.8
通讯作者：
X. Tan;Wen Zhan
中科院分区：
文献类型：
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作者：
X. Tan;Wen Zhan
频谱租赁被广泛认为是提高有限频谱资源利用率的最有效方法之一。在本文中，我们提出了一种新的流量自适应频谱租赁（TASL）计划，允许次要用户（SU）租赁部分授权频谱信道从主要用户（PU）暂时传输动态生成的次要数据包。由于每个租赁期的时间长度是可变的，根据动态生成的次级数据包，建议TASL可以有效地满足服务质量的要求，也有利于PU与SU提供的财务回报。通过建立一个三维连续马尔可夫链的建议TASL，我们制定的平均效用的PU和SU的预期缓冲时间的主要和次要的数据包，以及预期的传输吞吐量的PU和SU。此外，以非合作的方式协调的PU和SU的利益，我们还提出了一个Stackelberg博弈模型的PU和SU协商各种频谱租赁参数，并进一步应用两个特定的规则，以保证存在一个唯一的均衡解。仿真结果表明，与现有的固定租用时间的频谱租用方案相比，TASL能有效提高租用信道的利用率，提高PU和SU的平均效用，更适合于对分组传输时延和缓冲开销敏感的新兴应用.
Spectrum leasing has been widely regarded as one of the most effective ways to improve the utilization of limited spectrum resources. In this paper, we propose a novel traffic-adaptive spectrum leasing (TASL) scheme by allowing secondary users (SUs) to lease part of licensed spectrum channels from primary users (PUs) temporarily for transmitting the dynamically generated secondary packets. As the time length of each leasing period is variable according to the dynamic generation of secondary packets, the proposed TASL can effectively satisfy the quality-of-service requirement of SUs and also benefit PUs with the financial payoff provided by SUs. By establishing a three-dimensional continuous Markov chain for the proposed TASL, we formulate the average utilities of PUs and SUs in terms of the expected buffering time of primary and secondary packets, as well as the expected transmission throughput of PUs and SUs. Moreover, to coordinate the interests of PUs and SUs in a noncooperative manner, we also propose a Stackelberg game model for PUs and SUs to negotiate various spectrum leasing parameters and further apply two specific rules to guarantee the existence of a unique equilibrium solution. Numerical simulation shows that, compared with those existing spectrum leasing schemes that preset a fixed-time length for leasing periods, the proposed TASL can effectively improve the utilization of the leased channels, increase the average utilities of both PUs and SUs, and be more suitable for newly emerging applications that are sensitive to packet transmission delay and buffering overhead.