TD-LTE同频异频切换性能研究

中国移动TD-LTE网络宏站覆盖有D频段和F频段两个频段,对应有同频切换和异频切换两种方式,两种切换过程基本相同。同频切换前SINR会比较差,切换后SINR提升比较明显,异频切换时由于有频率隔离,SINR值一直比较趋于稳定,切换后SINR值也会有所提升,但是会有异频测量GAP时间占用。两种切换方式都会提升速率,但从大量测试数据分析来看,异频切换速率提升幅度高于同频切换。

The Study Of Handover Performance With Intra- Frequency and Inter-Frequency

Macro station of CMCC TD-LTE network is deployed in band D and band F. There are two kinds of handover: intra-frequency handover and inter-frequency handover, which are similar in handover progress. In intra-freqnency handover, SINR is relatively poor before handover while SINR improves greatly after handover. In inter-freqnency handover, because of frequency isolation, SINR is relatively stable and improves a little after handover, but the GAP of inter-freqnency measurement will take up some time. Both kinds of handover can improve the speed , but juding from a large number of test data, inter-freqnency handover show more speed improvement than intra-freqnency handover.