›› 2014, Vol. 34 ›› Issue (11): 3192-3195.

• 网络与通信 • 上一篇    下一篇

基于优先级的簇内终端直通数据转发策略

王俊义1,2,巩志帅2,符杰林2,仇洪冰2   

  1. 1.
    2. 认知无线电与信息处理省部共建教育部重点实验室(桂林电子科技大学),广西 桂林 541004
  • 收稿日期:2014-05-20 修回日期:2014-07-03 出版日期:2014-11-01 发布日期:2014-12-01
  • 通讯作者: 王俊义
  • 作者简介:王俊义(1977-),男,河北邢台人,副教授,博士,主要研究方向:无线通信、网络优化;巩志帅(1988-),男,山东泰安人,硕士研究生,主要研究方向:无线通信、网络优化;符杰林(1975-),男,海南文昌人,副教授,主要研究方向:信号处理;仇洪冰(1963-),男,江苏南通人,教授,博士生导师,主要研究方向:移动通信、超宽带无线通信、宽带通信网络、通信信号处理。
  • 基金资助:
    江苏高校优势学科建设工程项目;广西自然科学基金资助项目;广西无线宽带通信与信号处理重点实验室基金;广西信息科学实验中心基金;广西研究生教育创新计划项目

Priority-based device-to-device data forwarding strategy in cluster

WANG Junyi1,2,GONG Zhishuai2,FU Jielin2,QIU Hongbing2   

  1. 1.
    2. Key Laboratory of Cognitive Radio and Information Processing, Ministry of Education (Guilin University of Electronic Technology), Guilin Guangxi 541004, China
  • Received:2014-05-20 Revised:2014-07-03 Online:2014-11-01 Published:2014-12-01
  • Contact: WANG Junyi

摘要: 在蜂窝网络中,相同需求的用户可以建立成簇以利用终端直通(D2D)技术提高数据分发效率。然而,D2D链路质量的差异可能会成为提高资源效率的瓶颈。为了解决上述问题,在考虑链路质量差异的前提下,提出了基于优先级的D2D中继方案。该方案通过遍历链路质量矩阵自适应选取最优阈值,以优先选择可实现较高数据速率的D2D链路进行数据转发,提高了时频资源的利用率。与无优先级方案相比的仿真实验中:基于优先级的D2D中继方案消耗更少的时频资源,具有更高的资源效率,而且随着成功接收数据的用户(ACK用户)与未成功接收数据的用户(NACK用户)比值减小,优势更加明显;同时簇的大小对资源效率的改善也有一定影响。结果显示,对于簇内用户数目较少并且NACK用户多于ACK用户的情形,所提出的分级转发方案对资源效率的改善尤为明显。

关键词: 蜂窝网络, 终端直通(D2D), 优先级, 数据转发, 资源效率

Abstract: In cellular networks, users requesting the same data from base station can be grouped into a cluster, and Device-to-Device (D2D) links can be utilized to improve data dissemination efficiency. However, the difference of D2D links may be the bottleneck that results in conservative resource utilization. To solve this problem, a priority-based D2D relay scheme was proposed. The proposed scheme first set an optimal threshold by traversing the D2D links quality matrix, and then preferentially selected the D2D links with high achievable data rates to forward the data. In simulation experiment, compard with the traditional scheme without priority, the proposed scheme consumed less time and frequency resources with a higher efficiency especially when the ratio of ACK users and NACK users decreasing; meanwhile, the size of the cluster also influenced the improvement of resource efficiency. The results show that the proposed priority-based scheme improves resource efficiency when there is a small number of users, especially the users of NACK are more than that of ACK.

Key words: Cellular network, device-to-device (D2D), priority, data forwarding, resource efficiency

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