VoLTE无线关键技术研究

Research on Wireless Key Techniques of VoLTE

Vo LTE无线领域方面的研究,重点关注语音覆盖能力、质量、容量和无线新技术这几个方面。语音覆盖方面,通过链路预算和外场测试,对语音业务的极限覆盖能力和现有规划的覆盖情况进行了分析和验证;语音质量方面,全网测试结果显示,Vo LTE高清语音MOS值明显优于GSM;容量方面,通过理论分析,给出了不同配置下的Vo LTE并发用户数和受限信道,为后续容量提升提供了研究方向;无线新技术方面,介绍了多承载要求、Ro HC、C-DRX、SPS、Ro HC、TTI-Bundling等关键技术的原理和外场测试情况。

The research of VoLTE mainly focuses on the coverage, quality, capacity and new wireless techniques of voice coverage. For voice coverage, the maximal coverage capability and performance in existing TD-LTE networks wcrc analyzed and verified by using link budget and trial results. For voice quality, the network trial results show that the MOS of VoLTE is significantly outperformed than GSM. For capacity, the maximal number of concurrent users and the limited channels were presented under different configurations by means of theoretical analysis, which will provide the research direction on capacity enhancement. For new wireless techniques, principles and trial results of multi-bearer, RoHC, C-DRX, SPS, RoHC and TTI-Bundling were introduced.