A measurement-based study of handover improvement through range expansion and interference coordination

作者：Kuang Quan^*; Belschner Jakob; Bleicher Zarah; Droste Heinz; Speidel Joachim

来源：Wireless Communications and Mobile Computing, 2015, 15(14): 1784-1798.

DOI：10.1002/wcm.2460

• handover
• mobility management
• range expansion
• Heterogeneous Networks
• macro-pico deployment
• enhanced inter-cell interference coordination (eICIC)
• 4G LTE

Although the range expansion and inter-cell interference coordination (ICIC) have been shown to successfully enhance the capacity and load balancing in the Heterogeneous Network, their impacts on the handover (HO) performance are not fully understood in existing studies. In this paper, a novel measurement-based approach is adopted to investigate these issues, where the real measured data of the reference signal received power in a macro-pico co-channel deployment are collected. Then the mobility performance in terms of the HO failure rate and ping-pong rate is simulated with various ICIC schemes in the same reality environment. This has been made possible by modeling the possible HO failure events based on evaluating the downlink received signal-to-interference-plus-noise ratio from reference signal received power. The simulation results indicate that range expansion together with ICIC can have positive or negative influences on macro-to-pico, pico-to-macro, pico-to-pico and macro-to-macro HOs in the Heterogeneous Network. The existing static ICIC or mobility-based ICIC cannot handle the intra-layer (pico-to-pico and macro-to-macro) interference, thus limiting their abilities to improve the mobility performance. Motivated by this, a dynamic-ICIC-aided HO procedure is proposed. The proposed HO enhancement method is more flexible and effective in mitigating both the inter-layer and intra-layer interference, outperforming the existing methods significantly.

• 出版日期2015-10-10