Cellular network planning has traditionally focused on outdoor macro-network coverage. However, due to the relatively recent and rapid uptake of mobile data services in densely populated urban environments, indoor coverage has become a primary concern for carriers rolling out 4G networks.
There are four basic solutions in use for improving indoor coverage:
1） Increase traditional outdoor macro evolved-Node B (eNBs) LTE base stations to improve coverage and increase indoor penetration
2） Small cells (femto- and picocells) as hotspots for coverage black spots
3） Traditional indoor DAS (distributed antenna system)
4） ZTE Qcell solution
ZTE’s 4G Qcell solution uses cloud-based network coordination technology to overcome signaling leakage and interference. Unlike traditional DAS solutions, ZTE’s Qcell solution implements Pico RRU network construction and power supplies through standard Ethernet cables, reducing construction difficulty and costs, and reducing the time to deploy by 60 percent. The solution helps operators quickly rollout low-cost and high-performance networks with integrated GSM/UMTS/LTE indoor coverage.
ZTE’s Qcell solution uses cell combination technology to optimise contiguous indoor coverage, reduce interference from neighbouring cells, and lower the drop rate of handoff calls. In addition, this solution uses cell splitting to meet the increasing requirements for capacity.
ZTE’s transmission compression algorithms and patented multi-mode integration technologies aggregate two 20 MHz carriers for an LTE cell through an Ethernet cable, or provide GSM/UMTS/LTE, CDMA/LTE, and other wireless systems through an Ethernet cable, greatly simplifying the complexity of multi-mode indoor coverage networks.
In addition, the Qcell and macro eNBs share a network management system, where each node is visible, controllable, and manageable, significantly reducing operation and maintenance costs.