计算机应用与软件
計算機應用與軟件
계산궤응용여연건
COMPUTER APPLICATIONS AND SOFTWARE
2014年
3期
120-122,150
,共4页
LTE%下行调度%误包率%OFDMA
LTE%下行調度%誤包率%OFDMA
LTE%하행조도%오포솔%OFDMA
Long term evolution (LTE)%Downlink schedule%Block error ratio (BLER)%Orthogonal frequency-division multiple access (OFDMA)
基于 LTE 下行调度的空口误包场景，对现有的下行调度算法进行研究，提出一种新的调度算法。该算法主要通过 PHY层和 MAC 层联合统计用户的空口误包率。在调度模块进行用户调度优先级计算和进行用户的 MCS 选择时，考虑该用户的误包因素，避免给已经出现误包的用户进行大量的资源分配，进而改善网络性能。系统仿真证明，该算法能够有效适应空口的变化，提高LTE 网络的下行吞吐量和 LTE 网络资源的利用率。
基于 LTE 下行調度的空口誤包場景，對現有的下行調度算法進行研究，提齣一種新的調度算法。該算法主要通過 PHY層和 MAC 層聯閤統計用戶的空口誤包率。在調度模塊進行用戶調度優先級計算和進行用戶的 MCS 選擇時，攷慮該用戶的誤包因素，避免給已經齣現誤包的用戶進行大量的資源分配，進而改善網絡性能。繫統倣真證明，該算法能夠有效適應空口的變化，提高LTE 網絡的下行吞吐量和 LTE 網絡資源的利用率。
기우 LTE 하행조도적공구오포장경，대현유적하행조도산법진행연구，제출일충신적조도산법。해산법주요통과 PHY층화 MAC 층연합통계용호적공구오포솔。재조도모괴진행용호조도우선급계산화진행용호적 MCS 선택시，고필해용호적오포인소，피면급이경출현오포적용호진행대량적자원분배，진이개선망락성능。계통방진증명，해산법능구유효괄응공구적변화，제고LTE 망락적하행탄토량화 LTE 망락자원적이용솔。
Based on air-interface BLER scenario of LTE downlink scheduling,in this paper we mainly study the existing downlink scheduling algorithms,and propose a new scheduling algorithm.The algorithm counts the air interface BLER of users through PHY layer and MAC layers in main jointly.When the scheduling module calculates users’scheduling priority and selects the MCS of user,the new algorithm takes into account the BLER factor of the user,and prevents the large amount of resources to be allocated to those users with the BLER happened,so as to improve networks performance.It is proved through system simulation that the new algorithm can effectively adapt to the changes in air interfaces,and improves the download throughput of LTE network as well as the utilisation of LTE network resource.
