铁道学报
鐵道學報
철도학보
2015年
1期
44-50
,共7页
多跳中继蜂窝网络%OFDMA/TDD%频率规划%干扰协调%资源调度
多跳中繼蜂窩網絡%OFDMA/TDD%頻率規劃%榦擾協調%資源調度
다도중계봉와망락%OFDMA/TDD%빈솔규화%간우협조%자원조도
multi-hop relay cellular networks%OFDMA/TDD,frequency planning%interference coordination%resource scheduling
多跳中继蜂窝网络由于具有吞吐率高和覆盖性强的优点受到广泛关注。但是，中继站的引入改变了传统蜂窝网络的频率规划策略，因此如何在策略设计中对中继链路进行高效的频率资源分配成为极具挑战的问题；其次，小区频率复用越紧密，同频干扰越严重，对系统的整体性能产生影响。本文基于 IEEE 802.16j/m 标准，以下行链路的无线资源管理为基本手段，设计合理的资源复用策略及其对应的多跳中继下行子帧结构，在保证网络的资源利用率的同时，降低干扰给相邻小区边缘用户带来的影响；再将高效的比例公平调度算法扩展到多跳中继蜂窝网络，旨在兼顾系统整体性能和用户公平性。仿真和分析结果表明，干扰协调与资源调度策略相结合能显著提升系统吞吐率并改善用户公平性。
多跳中繼蜂窩網絡由于具有吞吐率高和覆蓋性彊的優點受到廣汎關註。但是，中繼站的引入改變瞭傳統蜂窩網絡的頻率規劃策略，因此如何在策略設計中對中繼鏈路進行高效的頻率資源分配成為極具挑戰的問題；其次，小區頻率複用越緊密，同頻榦擾越嚴重，對繫統的整體性能產生影響。本文基于 IEEE 802.16j/m 標準，以下行鏈路的無線資源管理為基本手段，設計閤理的資源複用策略及其對應的多跳中繼下行子幀結構，在保證網絡的資源利用率的同時，降低榦擾給相鄰小區邊緣用戶帶來的影響；再將高效的比例公平調度算法擴展到多跳中繼蜂窩網絡，旨在兼顧繫統整體性能和用戶公平性。倣真和分析結果錶明，榦擾協調與資源調度策略相結閤能顯著提升繫統吞吐率併改善用戶公平性。
다도중계봉와망락유우구유탄토솔고화복개성강적우점수도엄범관주。단시，중계참적인입개변료전통봉와망락적빈솔규화책략，인차여하재책략설계중대중계련로진행고효적빈솔자원분배성위겁구도전적문제；기차，소구빈솔복용월긴밀，동빈간우월엄중，대계통적정체성능산생영향。본문기우 IEEE 802.16j/m 표준，이하행련로적무선자원관리위기본수단，설계합리적자원복용책략급기대응적다도중계하행자정결구，재보증망락적자원이용솔적동시，강저간우급상린소구변연용호대래적영향；재장고효적비례공평조도산법확전도다도중계봉와망락，지재겸고계통정체성능화용호공평성。방진화분석결과표명，간우협조여자원조도책략상결합능현저제승계통탄토솔병개선용호공평성。
Multi-hop relay cellular networks (MRCNs )have drawn tremendous attention due to their high throughput and extensive coverage.However,introduction of relay stations (RSs)changes the frequency plan-ning schemes for traditional cellular networks and how to efficiently allocate frequency resources to relay links becomes a challenging design issue.Moreover,the more compact the frequency reuse patterns,the more severe the co-channel interference (CCI),which affects the network performance significantly.In this paper,accord-ing to Specification IEEE 802.16j/m,based on the downlink radio resource management,a proper resource re-use scheme and multi-hop relay downlink sub-frame were designed to deal with the inter-cell interference and guarantee the efficient utilization of resources in networks.The efficient PF algorithm was applied in MRCNs to take into account both the overall system performance and fairness of users.Extensive simulations demon-strate that combination between interference coordination and resource scheduling can significantly improve system throughput and ameliorate fairness for users.
