Mitigating mobility signaling congestion in LTE by overlapping tracking area lists

Authors:
Sara Modarres Razavi;Di Yuan
Affiliations:
Linköping Institute of Technology, Norrköping, Sweden;Linköping Institute of Technology, Norrköping, Sweden
Venue:
Proceedings of the 14th ACM international conference on Modeling, analysis and simulation of wireless and mobile systems
Year:
2011

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Mitigating signaling congestion in LTE location management by overlapping tracking area lists

Computer Communications

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Abstract

Avoiding signaling congestion in location management of cellular networks is becoming increasingly important as the population of user equipments (UEs) rapidly grows. Congestion can occur due to massive mobility of UEs behaving in a similar manner, such as the train movement scenario. In this paper, we explore the use of overlapping tracking area lists (TALs) in Long Term Evolution (LTE) networks for congestion mitigation that is not possible with the conventional tracking area concept. Each cell can use multiple and overlapping TALs, to be allocated to UEs requesting their TALs from the cell. We show that finding the optimal proportional use of TALs can be formulated as a linear program. Solving the linear program minimizes the maximum tracking area updates occurring between the cells. We present numerical results to illustrate the performance of the approach. The experiments demonstrate the effectiveness of overlapping TALs for mitigating mobility signaling congestion.