无线电通信技术
無線電通信技術
무선전통신기술
Radio Communications Technology
2015年
6期
23-26
,共4页
LTE系统%移动负载均衡%小区独立偏置%切换
LTE繫統%移動負載均衡%小區獨立偏置%切換
LTE계통%이동부재균형%소구독립편치%절환
LTE networks%mobility load balancing%CIO%handover
针对小区负载分布越来越不均衡，提出一种适用于 LTE 系统的负载均衡算法，通过调整小区独立偏置CIO ，强制过载小区用户切换到周围轻载小区，实现用户转移。但是，轻载小区盲目接纳用户容易造成过载。针对这一问题，运用迭代法，逐步调整CIO ，当过载小区负载低于过载门限或轻载小区可用资源耗尽，得到最优 CIO 值。仿真结果表明，提出的算法能有效提高系统均衡程度，降低用户呼叫阻塞率，提升系统性能，增强用户体验。
針對小區負載分佈越來越不均衡，提齣一種適用于 LTE 繫統的負載均衡算法，通過調整小區獨立偏置CIO ，彊製過載小區用戶切換到週圍輕載小區，實現用戶轉移。但是，輕載小區盲目接納用戶容易造成過載。針對這一問題，運用迭代法，逐步調整CIO ，噹過載小區負載低于過載門限或輕載小區可用資源耗儘，得到最優 CIO 值。倣真結果錶明，提齣的算法能有效提高繫統均衡程度，降低用戶呼叫阻塞率，提升繫統性能，增彊用戶體驗。
침대소구부재분포월래월불균형，제출일충괄용우 LTE 계통적부재균형산법，통과조정소구독립편치CIO ，강제과재소구용호절환도주위경재소구，실현용호전이。단시，경재소구맹목접납용호용역조성과재。침대저일문제，운용질대법，축보조정CIO ，당과재소구부재저우과재문한혹경재소구가용자원모진，득도최우 CIO 치。방진결과표명，제출적산법능유효제고계통균형정도，강저용호호규조새솔，제승계통성능，증강용호체험。
In view of more and more unbalanced cell load distribution,this paper presents a suitable load balancing algorithm in LTE system.By adjusting the cell individual offset (CIO),the overload users are forced to switch to the surrounding light load cell for load balancing.However,if the light load cell accepts users blindly,it is easy to result in overload.To solve this problem,the iterative method is used to gradually adjust the CIO,when the load of overload cell is below the overload threshold or the available resource of light load cell is exhausted,the optimal CIO value is obtained. The simulation results show that the proposed algorithm can effectively improve the network balancing,reduce the user call blocking rate,improve system performance and the user experience.
