摘要
多载波聚合技术是LTE-A(LTE-advanced)系统的一个关键技术,它能解决LTE-A系统对带宽资源的需求。由于不同频带的信号传输功率、覆盖范围不尽相同,使得终端在小区间的切换成为难点。本文在LTE切换流程的基础上分析了LTE-A载波聚合环境下的载波切换场景、小区内及小区间的载波切换流程,为了减少多载波切换的失败率,提出了同时向多个符合条件的相邻小区发出切换请求并选择其中最佳小区进行切换的改进思路,同时针对多目标eNB切换方式设计了两种多载波切换方法。
The multi-carriers aggregation was an key technology for LTE-advanced（LTE-A）system, it can solve the needs of bandwidth resources of LTE-A. Since the radio of different frequency bands have different transmission power/coverage, which will result in the trouble of handoff between cells. In this paper, based on LTE handoff process, analysing carrier handoff scenes and carrier handoff process at the same cell and different cells in carrier aggregation. In order to reduce the failure rate of multi-carriers handoff, handoff desire should be sent to more adaptive contiguous cells and selecting the optimal cell. Two multi-carriers handoff methods are designed for multi-objective eNB.
出处
《电信科学》
北大核心
2009年第12期46-50,共5页
Telecommunications Science
基金
重庆市教委2009年项目(No.KJ090502和No.KJ080516)
重庆大学研究生创新重点项目(No.200904B1A0010306)
