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In recent years, network densification has become the trend of cellular network development. Connecting densely deployed small cells via optical fiber leads to high cost, and cannot achieve flexible networking. Therefore, it is critical to use mmWave for wireless backhaul networks. In an ultra-dense network, it is challenging to develop a flexible, efficient, and reliable routing mechanism for wireless backhaul network. To this end, we develop a multi-gateway wireless mesh network architecture with high and low frequency spectrum, and design a flexible grouping mechanism as well as a dynamic routing mechanism accordingly.
More specifically, the grouping mechanism divides macro base stations into multiple groups in a centralized manner, so that: 1) the mmWave links among groups are reduced; 2) the signaling delay among base stations in a group satisfies requirements. The routing mechanism not only support terminal mobility, but also adapt to the addition and deletion of small-cell base stations. Furthermore, the routing mechanism satisfy the QoS requirements of terminals. The network architecture, mechanisms and the corresponding algorithms are evaluated via extensive simulations, and achieve large improvement compared with the existing mechanisms.
People:
Cheng Huang, Mengxin Yu, Chao Xu, Bangzhao Zhai, and Aimin Tang
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