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Analytical Modelling for Mobility Signalling in Ultra-Dense HetNets

Taufique, A, Mohamed, Abdelrahim, Farooq, H, Imran, A and Tafazolli, Rahim (2018) Analytical Modelling for Mobility Signalling in Ultra-Dense HetNets IEEE Transactions on Vehicular Technology.

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Abstract

Multi-band and multi-tier network densification is being considered as the most promising solution to overcome the capacity crunch problem of cellular networks. In this direction, small cells (SCs) are being deployed within the macro cell (MC) coverage, to off-load some of the users associated with the MCs. This deployment scenario raises several problems. Among others, signalling overhead and mobility management will become critical considerations. Frequent handovers (HOs) in ultra dense SC deployments could lead to a dramatic increase in signalling overhead. This suggests a paradigm shift towards a signalling conscious cellular architecture with smart mobility management. In this regards, the control/data separation architecture (CDSA) with dual connectivity is being considered for the future radio access. Considering the CDSA as the radio access network (RAN) architecture, we quantify the reduction in HO signalling w.r.t. the conventional approach. We develop analytical models which compare the signalling generated during various HO scenarios in the CDSA and conventionally deployed networks. New parameters are introduced which can with optimum value significantly reduce the HO signalling load. The derived model includes HO success and HO failure scenarios along with specific derivations for continuous and non-continuous mobility users. Numerical results show promising CDSA gains in terms of saving in HO signalling overhead.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
NameEmailORCID
Taufique, A
Mohamed, Abdelrahimabdelrahim.mohamed@surrey.ac.uk
Farooq, H
Imran, A
Tafazolli, RahimR.Tafazolli@surrey.ac.uk
Date : 2018
Copyright Disclaimer : © 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works
Uncontrolled Keywords : Cellular networks; control data separation architecture; dual connectivity handover; signalling load; radio access networks.
Depositing User : Melanie Hughes
Date Deposited : 06 Apr 2018 13:22
Last Modified : 11 Apr 2018 15:04
URI: http://epubs.surrey.ac.uk/id/eprint/846138

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