无线电工程
無線電工程
무선전공정
RADIO ENGINEERING OF CHINA
2014年
5期
1-4,15
,共5页
异构网%几乎空白子帧%下行干扰%空域干扰协调
異構網%幾乎空白子幀%下行榦擾%空域榦擾協調
이구망%궤호공백자정%하행간우%공역간우협조
heterogeneous network%ABS%downlink interference%airspace interference coordination
在通用移动通信系统( Universal Mobile Telecommunications System, UMTS)异构网络中,理论分析了宏基站对微微( Pico)小区边缘用户的下行干扰问题。在传统空白帧( ABS)方法的基础上,提出了一种干扰避免策略,其主要思想是通过联合时域ABS策略和空域基于码本限制的策略提高传统ABS策略的系统性能,即在ABS子帧上,宏基站并不是完全不发送数据,而是采用码本受限的预编码进行传输。限制的码本可以根据宏小区自身的负载动态进行更改,并通过广播传递给低功率节点( Low Power Node, LPN), LPN根据得到的信息进行边缘用户的调度。仿真结果表明,提出的方法在最差5%用户吞吐率比ABS方法略有下降的情况下,使用户平均吞吐量得到了提升。
在通用移動通信繫統( Universal Mobile Telecommunications System, UMTS)異構網絡中,理論分析瞭宏基站對微微( Pico)小區邊緣用戶的下行榦擾問題。在傳統空白幀( ABS)方法的基礎上,提齣瞭一種榦擾避免策略,其主要思想是通過聯閤時域ABS策略和空域基于碼本限製的策略提高傳統ABS策略的繫統性能,即在ABS子幀上,宏基站併不是完全不髮送數據,而是採用碼本受限的預編碼進行傳輸。限製的碼本可以根據宏小區自身的負載動態進行更改,併通過廣播傳遞給低功率節點( Low Power Node, LPN), LPN根據得到的信息進行邊緣用戶的調度。倣真結果錶明,提齣的方法在最差5%用戶吞吐率比ABS方法略有下降的情況下,使用戶平均吞吐量得到瞭提升。
재통용이동통신계통( Universal Mobile Telecommunications System, UMTS)이구망락중,이론분석료굉기참대미미( Pico)소구변연용호적하행간우문제。재전통공백정( ABS)방법적기출상,제출료일충간우피면책략,기주요사상시통과연합시역ABS책략화공역기우마본한제적책략제고전통ABS책략적계통성능,즉재ABS자정상,굉기참병불시완전불발송수거,이시채용마본수한적예편마진행전수。한제적마본가이근거굉소구자신적부재동태진행경개,병통과엄파전체급저공솔절점( Low Power Node, LPN), LPN근거득도적신식진행변연용호적조도。방진결과표명,제출적방법재최차5%용호탄토솔비ABS방법략유하강적정황하,사용호평균탄토량득도료제승。
In Universal Mobile Telecommunications System(UMTS) heterogeneous networks,the downlink interference of Pico users from Macro base station is analyzed theoretically and an interference coordination strategy is proposed.The proposed strategy aims to improve the average throughput of traditional ABS by combining the time-domain ABS strategy and spacial pro-coding scheme based on limited codebook set.That is,during the ABSs,Macro BS sends data based on pro-coding with limited codebook set instead of sending nothing at all.The limited codebook set can be transmitted to LPN(Low Power Node)via broadcast,and changed dynamically according to the load changes of Macro cell itself.LPN can schedule bordered users according to the received information.Simulation results show that,compared with the traditional ABS strategy,the proposed method can improve the average throughput at the cost of slight loss of throughput by 5%.