北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2009, Vol. 32 ›› Issue (5): 132-136.doi: 10.13190/jbupt.200905.132.gongp

• 研究报告 • 上一篇    下一篇

OFDMA中继蜂窝系统的接入控制策略

龚萍;王东昊;牛凯;吴伟陵   

  1. (北京邮电大学 信息与通信工程学院, 北京 100876)
  • 收稿日期:2009-02-15 修回日期:2009-07-16 出版日期:2009-10-28 发布日期:2009-10-28
  • 通讯作者: 龚萍

Admission Control of OFDMA Relay Cellular System

GONG Ping,WANG Dong-hao,NIU Kai,WU Wei-ling   

  1. (School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China)
  • Received:2009-02-15 Revised:2009-07-16 Online:2009-10-28 Published:2009-10-28

摘要:

针对正交频分多址(OFDMA)2跳中继蜂窝系统,提出几种改进的用户接入中继的控制策略.
采用启发式算法,以已接入用户的业务质量(QoS)指标、中继负载大小为约束条件,综合
考虑用户对中继的选择、用户间竞争接入等情况,最大化每个中继上可减少使用的子载波数
,从而有效提高资源利用率和系统容量. 仿真结果验证了改进策略能进一步提高系统容量.

关键词: 接入控制, 中继, 2跳, 正交频分多址, 业务质量

Abstract:

Some new call admission control schemes in orthogonal frequency division multiplexing access (OFDMA) relaying cellular system are investigated. Subjected to hard constraint on the quality-of-service (QoS) requirements, the capability of relay, the user's selection of relay and the competence among users, these schemes enlarge the amount of subcarriers saved by two-hop transmission of each relay as much as possible, thus enhancing the resource utilization and system capacity. Simulations verify the effectiveness of the proposed scheme.

Key words: admission control, relay, two-hop, orthogonal frequency division multiplexing access, quality-of-service