Research and Field Trial of Uplink Coordinated Multipoint Processing in TD-LTE Network

TD-LTE is deployed in the same frequency band to improve spectral usage, which also makes the inter-cell interference (ICI) become one of the main bottlenecks of the network capacity. The test results of the large scale TD-LTE field trial demonstrate more than 70% UE could detect signals from multiple cells. The coordinated multi-point processing (CoMP) technology adopts several cell to jointly transmit/receive signals for UE, which could effectively reduce ICI. Several kinds of uplink CoMP scheme were studied. Especially, the field trial of the uplink CoMP in the realistic TD-LTE network was introduced. The test results show that the cell-edge UE could achieve 50% similar to 100% throughput gain via the uplink CoMP technology, which significantly improves the user experience.