Performance analysis and modeling of two-tier cellular networks with queuing handoff calls

Abstract

One way of improving the performance of a cellular network is to build a second tier (layer) called the macrocell on top of the existing single-tier called the microcell. Multi-tier cellular networks provide mobility solutions to both the high speed and low speed users. Since dropping an ongoing call when a mobile user moves from one cell to another is an undesirable event, several techniques have been previously proposed to solve this problem. In a cellular network, this problem can be solved by delaying the handoff call using a queue, until it's able to maintain a channel.In this paper, a new Markov model is developed for a two-tier cellular network having a FIFO queue in the macrocell, which takes into account the mobility and the queue time of users. Later, the analytical model of the cellular system is solved and its performance is calculated. The results are then compared with previously proposed models.

Performance Evaluation of Handover Channel Exchange Scheme in GSM Network

“…In technical literature, several handover policies and channel assignment policies have been proposed to minimize handover failures in mobile cellular communication. Salih and Fidanboyu [1], [2] described and modeled queuing techniques for two-tier cellular networks. In [1] a micro cell/macrocell network using a FIFO queue in macro cell tier and in [2] a microcell/macrocell network using a FIFO is queue in microcell tier is introduced and compared with each other.…”

Performance analysis of prioritized and non prioritized handoff call queuing schemes in mobile cellular networks

“…Recently, emphasis has been laid on preemptive and non preemptive HO schemes [9]. With the evolution of next generation networks, several classes of traffic are to be serviced simultaneously and new HO techniques should be able to cope with different bandwidth requirements and prioritization of traffic classes for efficient QoS disposal across the whole network [4][5], [7][8].…”

“…Salih and Fidanboylu [1], [5] described and modeled queuing techniques for two-tier cellular networks. In [1], a microcell/ macrocell network using a FIFO queue in macrocell tier and in [5] a microcell/ macrocell network using a FIFO queue in microcell tier is introduced and compared with each other.…”

“…In [1], a microcell/ macrocell network using a FIFO queue in macrocell tier and in [5] a microcell/ macrocell network using a FIFO queue in microcell tier is introduced and compared with each other. The results of both systems showed that forced termination probability for slow users is decreased when the FIFO queue is used in the microcell Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page.…”

An analytical model of two-tier handoff mechanisms for a hierarchical NEMO system

“…In this paper, we focus on proposing a channel allocation scheme for a hierarchical two-tier NEMO system, in which both the handoff behaviors of the MR and the visiting behaviors of MNs are taken into account. In a two-tier cellular network [10] and a CDMA mobile system with soft handoff [11], the service areas of MR and of AR can be divided into a handoff region and a non-handoff region, respectively. Therefore, concurrent voice/data sessions within an MR can be classified into four types according to the locations of MN and MR within the MR's and the AR's service areas, respectively.…”