Abstract
This paper considers the hidden node avoidance problem in an LTE-U and WiFi coexistence system operating in unlicensed bands. An enhanced Listen Before Talk (e-LBT) mechanism is proposed for coordinating the LTE-U and WiFi systems. To support the e-LBT mechanism, we first enhance an LTE-U node by introducing a WiFi module in the LTE-U eNB and redefining the RRC and MAC functional blocks in both LTE-U eNB and LTE-U UE in order to enable information exchange between an LTE-U node and a WiFi node. Moreover, the e-LBT mechanism incorporates an RTS/CTS handshaking mechanism in the basic LBT mechanism to resolve the hidden node problem. Simulation results show that the proposed e-LBT mechanism can significantly improve the performance of the coexistence system in terms of LTE-U system throughput as compared with the basic LBT mechanism.
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© 2018 ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering
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Chu, L., Zheng, J., Xiao, J. (2018). An Enhanced Listen Before Talk (e-LBT) Mechanism for Avoiding Hidden Nodes in an LTE-U and WiFi Coexistence System. In: Li, C., Mao, S. (eds) Wireless Internet. WiCON 2017. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 230. Springer, Cham. https://doi.org/10.1007/978-3-319-90802-1_21
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DOI: https://doi.org/10.1007/978-3-319-90802-1_21
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