中国新通信
中國新通信
중국신통신
CHINA NEW TELECOMMUNICATIONS
2014年
2期
124-125,126
,共3页
高速下行链路分组接入%中继%分组时延%调度
高速下行鏈路分組接入%中繼%分組時延%調度
고속하행련로분조접입%중계%분조시연%조도
HSDPA%Relay%Packet Delay%Schedule
在传统的高速下行链路分组接入(HSDPA,High Speed Downlink Packet Access)系统中,对于实时业务的调度,主流算法是修正的最大加权时限优先(Modified- Largest Weight Deadline First,M- LWDF)算法。但由于中继的引入,中继用户的延时增加必然会导致中继用户的丢包率增大,从而降低了系统的性能。基于此,本文提出了一种改进的M- LWDF算法,并通过VoIP业务对该算法进行了仿真验证。结果表明该算法能够在保证用户QoS要求的前提下,提高系统吞吐量。
在傳統的高速下行鏈路分組接入(HSDPA,High Speed Downlink Packet Access)繫統中,對于實時業務的調度,主流算法是脩正的最大加權時限優先(Modified- Largest Weight Deadline First,M- LWDF)算法。但由于中繼的引入,中繼用戶的延時增加必然會導緻中繼用戶的丟包率增大,從而降低瞭繫統的性能。基于此,本文提齣瞭一種改進的M- LWDF算法,併通過VoIP業務對該算法進行瞭倣真驗證。結果錶明該算法能夠在保證用戶QoS要求的前提下,提高繫統吞吐量。
재전통적고속하행련로분조접입(HSDPA,High Speed Downlink Packet Access)계통중,대우실시업무적조도,주류산법시수정적최대가권시한우선(Modified- Largest Weight Deadline First,M- LWDF)산법。단유우중계적인입,중계용호적연시증가필연회도치중계용호적주포솔증대,종이강저료계통적성능。기우차,본문제출료일충개진적M- LWDF산법,병통과VoIP업무대해산법진행료방진험증。결과표명해산법능구재보증용호QoS요구적전제하,제고계통탄토량。
In the traditional HSDPA system, for real time traffic schedule, the current mainstream schedule algo-rithm is M- LWDF algorithm. If continuing to adopt this algorithm in HSDPA relay system, the increasing of relay user latency wil inevitably lead to packet loss rate increasing and system performance reducing. Therefore, this paper pro-poses a modified M- LWDF algorithm and adopt VoIP traffic to verify the performance of the proposed algorithm. The result shows that the proposed algorithm can increase system throughput under the premise of ensuring user QoS.