Reduction of downlink delay time for heterogeneous users in Fi-Wi indoor networks

D. DebBarma

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Ubiquitous presence of umpteen WiFi access points (AP) in indoor locations leads to massive degradation in effective data rates acquired by users. Indoor space contributes approximately 80% of the data generated in today's world. Thus, radio resource management in indoor environment calls for immediate attention. Hybrid Fibre-Wireless (Fi-Wi) architecture for indoor has been proposed to combine the benefits of a huge bandwidth availability of fibre with the mobility offered by wireless access. In this paper, we propose a managed hybrid Fi-Wi indoor network. It consists of fibre infrastructure emanating from central home communication controller. Radio-over-fibre technology is used to distribute the radio signals throughout the indoor space using cell access nodes (CANs) to cover the immediate periphery inside rooms. The biggest advantage of such architecture is the ease of managing centrally the indoor radio resources for guaranteeing a better Quality of Service amongst heterogeneous user. In this paper, we model the problem of CAN to AP assignment based on downlink transmission delay experienced by users. We propose a centralised assignment method based on the reduction of overall network downlink transmission delay. Using MATLAB simulations, we show that a massive 66% reduction in the maximum downlink delay time for non-uniform distribution of heterogeneous users can be achieved. Finally, we prove the optimality of the centralised assignment algorithm using coalition game theory.

Original languageEnglish
Article numbere2952
Number of pages10
JournalTransactions on Emerging Telecommunications Technologies
Volume28
Issue number2
DOIs
Publication statusPublished - 1 Feb 2017

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