Abstract
There is a problem of unfairness in allocation of radio resources among heterogeneous mobile terminals in heterogeneous wireless networks. Low-capability mobile terminals (such as single-mode terminals) suffer high call blocking probability whereas high-capability mobile terminals (such as quad-mode terminals) experience very low call blocking probability, in the same heterogeneous wireless network. This paper proposes a Terminal-Modality-Based Joint Call Admission Control (TJCAC) algorithm to reduce this problem of unfairness. The proposed TJCAC algorithm makes call admission decisions based on mobile terminal modality (capability), network load, and radio access technology (RAT) terminal support index. The objectives of the proposed TJCAC algorithm are to reduce call blocking/dropping probability, and ensure fairness in allocation of radio resources among heterogeneous mobile terminals in heterogeneous networks. An analytical model is developed to evaluate the performance of the proposed TJCAC scheme in terms of call blocking/dropping probability in a heterogeneous wireless network. The performance of the proposed TJCAC algorithm is compared with that of other JCAC algorithms. Results show that the proposed algorithm reduces call blocking/dropping probability in the networks, and ensure fairness in allocation of radio resources among heterogeneous terminals.
Highlights
The success of generation networks will be derived from a combination of terminal heterogeneity and network heterogeneity [1]
This paper proposes a Terminal-Modality-Based Joint Call Admission Control (TJCAC) algorithm to reduce this problem of unfairness
This paper considers a heterogeneous cellular network which comprises a set of radio access technology (RAT) H with co-located cells supporting heterogeneous terminals
Summary
The success of generation networks will be derived from a combination of terminal heterogeneity and network heterogeneity [1]. Equipment manufacturers have come up with different terminals that possess a wide range of capabilities in order to take full advantage of heterogeneous wireless networks These mobile terminals will be able to access network services by choosing one of several RATs that are available in heterogeneous wireless networks. Existing JCAC algorithms do not consider mobile terminal heterogeneity and mobile terminal modality, in making call admission decisions. In a heterogeneous wireless network supporting heterogeneous mobile terminals, if terminal modality is not considered in making call admission decisions, there will be a problem of unfairness in allocation of radio resources among the heterogeneous terminals in the network. In order to reduce this problem of unfairness in allocation of radio resources among heterogeneous terminals in heterogeneous wireless networks, a terminal-modalitybased JCAC (TJCAC) scheme is proposed for heterogeneous wireless networks.
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