Hidden Node Aware Resource Allocation in Licensed-Assisted Access Systems

被引：0
|
作者：
Zhang, Tiankui [1 ]
Zhao, Jiaojiao [1 ]
Chen, Yue [2 ]
机构：
[1] Beijing Univ Posts & Telecommun, Beijing Key Lab Network Syst Architecture & Conve, Sch Informat & Commun Engn, Beijing Lab Adv Informat Networks, Beijing 100876, Peoples R China
[2] Queen Mary Univ London, Sch Elect Engn & Comp Sci, London, England
来源：
GLOBECOM 2017 - 2017 IEEE GLOBAL COMMUNICATIONS CONFERENCE | 2017年
关键词：
Dual-access small cell; LTE-unlicensed; Licensed-assisted access; Hidden nodes; Resource allocation;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Licensed-assisted access (LAA) adds great value to cellular networks by extending access to the unlicensed bands, which leads to increased capacity and spectrum efficiency. To fully take advantage of LAA systems and achieve fair coexistence with Wi-Fi networks, channel access mechanisms, such as the listen before talk (LBT), are required. However, due to the LBT mechanism, LAA systems may suffer from the interference of WiFi hidden nodes. In this paper, a hidden node aware joint licensed and unlicensed resource allocation algorithm for LAA systems is proposed. By utilizing measurable medium access control (MAC) layer statistics, an adaptive unlicensed band weight factor is introduced to reflect the impact of Wi-Fi hidden nodes. A resource allocation optimization problem is formulated to maximize the throughput of LAA with quality of service (QoS) guarantee, then an iteration-based solution is obtained by optimizing subcarriers and power allocation in the licensed band and fraction of time allocation in the unlicensed band with fixed power. Extensive simulation results are given to evaluate the performance and validate the effectiveness of the proposed algorithm.
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页数：6
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