一种基于LTE空口误包的下行跨层调度算法研究

摘要

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。%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.