An adaptive location management scheme for mobile broadband cellular systems

Canales, María; Gállego, José Ramón; Hernández, Ángela; Valdovinos, Antonio

doi:10.1007/s11235-011-9665-3

Cited by 6 publications

(13 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This ratio is common in the literature [30,49,66]. That is if c u is set to 1 cost unit, then c p should be 0.1 cost units.…”

Section: Signaling Overhead Calculation and Unitmentioning

confidence: 99%

Planning and Optimization of Tracking Areas for Long TermEvolution Networks

Razavi¹

2014

View full text Add to dashboard Cite

Along with the evolution of network technologies, user's expectations on performance and mobile services are rising rapidly. To fulfill customer demands, the operators are facing a great amount of network signaling overhead in terms of Location Management (LM), which tracks and pages User Equipments (UEs) in the network. Hence, sustaining a reliable and cost-efficient LM system for future mobile broadband networks has become one of the major challenges in mobile telecommunications. Tracking Area (TA) in Long Term Evolution (LTE), is a logical grouping of cells that manages and represents the locations of UEs. This dissertation deals with planning and optimization of TAs.TA design must be revised over time in order to adapt to changes and trends in UE location and mobility patterns. Re-optimization of a once optimized design subject to different cost budgets is one of the problems considered in this dissertation. By re-optimization, the design is successively improved by reassigning some cells to TAs other than their original ones. An algorithm based on repeated local search is developed in order to solve the resulting problem.The next topic of research is the trade-off between the performance in terms of the total signaling overhead of the network and the reconfiguration cost. This trade-off is modeled as a bi-objective optimization problem to which the solutions are characterized by Paretooptimality. Solving the problem delivers a host of potential tradeoffs, among which the selection can be based on the preferences of a decision-maker. An integer programming model and a genetic algorithm heuristic are developed for solving the problem in large-scale networks.In comparison to previous generations of cellular networks, LTE systems allow for a more flexible configuration of TA design by means of Tracking Area List (TAL). How to utilize this flexibility in applying TAL to large-scale networks is still an open problem. In this dissertation, three approaches for allocating and assigning TALs are presented, and their performances are compared with each other, as well as with the conventional TA scheme. Moreover, a linear programming model is developed to minimize the total signaling overhead of the network based on overlapping TALs.In this dissertation, the problem of mitigating signaling congestion is thoroughly studied both for the specific train scenario and also for the general network topology. For each signaling congestion scenario, a related linear programming model based on minimizing the maximum signaling due to tracking area update or paging is developed. As a major advantage of the modified overlapping TAL scheme iii for signaling congestion avoidance, information of individual UE mobility is not required.Automatic reconfiguration of LM is an important element in LTE. The network continuously collects UE statistics, and the management system adapts the network configuration to changes in UE distribution and demand. In this dissertation an evaluation of dynamic configuration of TA design, including ...

show abstract

“…This ratio is common in the literature [30,49,66]. That is if c u is set to 1 cost unit, then c p should be 0.1 cost units.…”

Section: Signaling Overhead Calculation and Unitmentioning

confidence: 99%

Planning and Optimization of Tracking Areas for Long TermEvolution Networks

Razavi¹

2014

View full text Add to dashboard Cite

show abstract

“…Nowadays, the cellular mobile system (CMS) has become one of the most profitable mobile systems because more applications are being made available for smart phones, which also have very attractive functions [1,2]. One of the most important issues in the management of a CMS concerns the effective utilization of the limited resources of the radio spectrum and the maintenance of communication quality.…”

Section: Introductionmentioning

confidence: 99%

Fuzzy call admission control combined with distributed dynamic channel assignment and reassignment for cellular mobile systems

Horng

Lin

2015

J Wireless Com Network

View full text Add to dashboard Cite

In a cellular mobile system (CMS), the service area is divided into cells, each of which has numerous channels, which are shared by two types of call -new calls and handoff calls. Giving a higher priority to handoff calls than new calls is common practice. However, giving too much priority to handoff calls will result to excessive blocking of new calls. This work firstly proposes a distributed dynamic channel assignment and reassignment (DDCAR) scheme to satisfy three types of constraint -co-channel constraint (CCC), adjacent channel constraint (ACC), and co-site constraint (CSC), simultaneously. The purpose is to minimize the number of available channels that become unavailable for the assignment to new calls and to maximize the number of unavailable channels that become available for release when calls complete. To provide a higher priority to handoff calls, a fuzzy call admission control (FCAC) scheme, combined with the DDCAR, is proposed herein for implementation at the base station. A 7 × 7 CMS with two traffic patterns is employed as the test example. The test results reveal that the FCAC scheme significantly reduces the dropping probability of handoff calls at the cost of increasing the blocking probability of new calls to an acceptable level.

show abstract

“…On the other hand, when the call arrives, the mobility manager must page all the cells in that LA (paging). Thus, increasing the number of cells that belong to a LA implies a reduction in the number of location updates, but an increase in the paging cost, defined as the number of paged cells required to locate the user 1, 2.…”

Section: Introductionmentioning

confidence: 99%

“…The heterogeneity of networks, devices, and even applications, suggests the need of a profile‐based location management technique to ensure the user's requirements, guaranteeing efficient resource utilization for a deployed cellular infrastructure 1–3. New packet‐based mobile broadband systems are positioned in this line.…”

Section: Introductionmentioning

confidence: 99%

“…In this context, in Ref. 2 we proposed a location update scheme based on the definition of an adaptive macro‐location area (macro‐LA), adapted to the mobility pattern of the terminals. The scheme is deployed on a network based on static LAs, by the definition of a macro‐LA per user, composed by several LAs, which tries to predict the user's movement.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Adaptive paging schemes for group calls in mobile broadband cellular systems

Gállego

Canales

Hernández-Solana

2010

Wireless Communications

Self Cite

View full text Add to dashboard Cite

In this paper, we analyze the problem of efficient paging for group call searches under realistic mobility patterns. Taking as a basis a location update scheme, based on the definition of an adaptive macro-location area, adapted to the mobility pattern of the terminals, we characterize the residence probabilities in each location area of a generic macro-area. With this information, we propose and evaluate different sequential group paging strategies, also taking into account their computational cost. Results show the suitability of some of the proposals (semiadaptive and hybrid schemes) and its applicability to new packet-based broadband cellular systems. Adaptive paging schemes for group calls J. R. Gállego et al. Adaptive paging schemes for group calls J. R. Gállego et al. Adaptive paging schemes for group calls J. R. Gállego et al. J. R. Gállego et al. Adaptive paging schemes for group calls

show abstract

An adaptive location management scheme for mobile broadband cellular systems

Cited by 6 publications

References 25 publications

Planning and Optimization of Tracking Areas for Long TermEvolution Networks

Planning and Optimization of Tracking Areas for Long TermEvolution Networks

Fuzzy call admission control combined with distributed dynamic channel assignment and reassignment for cellular mobile systems

Adaptive paging schemes for group calls in mobile broadband cellular systems

Contact Info

Product

Resources

About