Two-Staged Load Balancing Mechanism in LTE Self-Organization Networks

Abstract:

In mobile communication system, the traffic is time-varying and unpredictable, so there will be some hot-spot cells. It means that, the number of service request is much higher than an acceptable level in some cells, which may result in call-blocking with a large probability. But in other cells of system there are still resources available to serve more users. How to avoid the imbalance to effectively improve the system's resource utilization is what load balancing need to solve. In this paper, a new kind of event-trigger mechanism using cell load status information exchange between eNBs via X2 interface is presented. Additionally, based on it, a novel load balancing algorithm, named TSLB(two-staged load balancing), for LTE systems is put forward. Using this algorithm, eNBs can start corresponding load balancing procedure accurately according to the cell load status in real-time without any manual intervention. Simulation results show that the method is valid and it can increase the system throughput significantly as well as decrease the network delay.

• Periodical: Advanced Materials Research (Volume 811)
• Pages: 514-519
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.811.514
• Online since: September 2013
• Authors: Li Li, Jing Jing Zhang, Jian Ya Chen
• Keywords: Handover, Load Balancing, Long Term Evolution (LTE), SON, Trigger Mechanism

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