Research Article
An Enhanced Listen Before Talk (e-LBT) Mechanism for Avoiding Hidden Nodes in an LTE-U and WiFi Coexistence System
@INPROCEEDINGS{10.1007/978-3-319-90802-1_21, author={Liangyu Chu and Jun Zheng and Jie Xiao}, title={An Enhanced Listen Before Talk (e-LBT) Mechanism for Avoiding Hidden Nodes in an LTE-U and WiFi Coexistence System}, proceedings={Wireless Internet. 10th International Conference, WiCON 2017, Tianjin, China, December 16-17, 2017, Proceedings}, proceedings_a={WICON}, year={2018}, month={5}, keywords={Coexistence Hidden node LBT LTE-U WiFi}, doi={10.1007/978-3-319-90802-1_21} }- Liangyu Chu
Jun Zheng
Jie Xiao
Year: 2018
An Enhanced Listen Before Talk (e-LBT) Mechanism for Avoiding Hidden Nodes in an LTE-U and WiFi Coexistence System
WICON
Springer
DOI: 10.1007/978-3-319-90802-1_21
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.
