Admission control and resource allocation in a heterogeneous OFDMA wireless network

Bashar, Shafi; Ding, Zhi

doi:10.1109/twc.2009.080844

Cited by 44 publications

(28 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In fact, in several conventional wireless communication systems such as the orthogonal frequency division multiple access (OFDMA)-based wireless networks, RA has been a rather active research topic. A few of the works that have addressed RA problems in OFDMA communication systems are found in references [19][20][21][22][23][24][25]. In general, RA problems in wireless communication essentially define how to optimise the limited resources in the communication network.…”

Section: Resource Allocation In Cognitive Radio Networkmentioning

confidence: 99%

“…There are examples in the literature of the use of approximation in obtaining solution to RA problems in the OFDMA-based networks, as well as CRN. In [24] for instance, the authors, in order to maximise total network utility, approximated their best-effort user utility function as a piece-wise linear function and proposed an LP-based cluster allocation algorithm for solving. The major setbacks with this approach are that the approximate representation of the original function could contain a number of extra variables, leading to an increase in the decision variables of the entire problem, and solutions obtained through approximate substitutes are usually suboptimal rather than optimal.…”

Section: Solution By Linearisationmentioning

confidence: 99%

See 1 more Smart Citation

Solving resource allocation problems in cognitive radio networks: a survey

Awoyemi

Maharaj

Alfa

2016

J Wireless Com Network

View full text Add to dashboard Cite

Cognitive radio networks (CRN), in their quest to become the preferred next-generation wireless communication paradigm, will depend heavily on their ability to efficiently manage the limited resources at their disposal in meeting the demands of their numerous users and driving their operations. As a result, a considerable amount of research work has been recently dedicated to investigating and developing resource allocation (RA) models that capture the essentials of CRN. The various ideas put forward by researchers to address RA problems in CRN have been somewhat diverse, and somehow, there seem to be no links that bring cohesion and clarity of purpose and ideas. To address this problem and bridge the gap, in this paper, a comprehensive study on the prevalent techniques developed for addressing RA problems in CRN is carried out, with an intent to put some structure, relevance and meaning to the various solution approaches. The solution models are therefore grouped and/or classified based on certain outstanding criteria, and their strengths and weaknesses highlighted. Open-ended problems are identified, and suggestions for improving solution models are given. The study therefore gives good directions for further investigations on developing RA solutions in CRN.

show abstract

Section: Resource Allocation In Cognitive Radio Networkmentioning

confidence: 99%

Section: Solution By Linearisationmentioning

confidence: 99%

Solving resource allocation problems in cognitive radio networks: a survey

Awoyemi

Maharaj

Alfa

2016

J Wireless Com Network

View full text Add to dashboard Cite

show abstract

“…Furthermore, no outage based admission control can be performed from this approach which is another significant disadvantage. A recent paper [26] addresses admission control in OFDMA system with dynamic resource allocation. Here, the authors focus on determining the amount of terminals that can be served during a single down-link phase given the instanteous subcarrier gain matrix G. However, the work does not provide a longer-term prediction of the system capacity as presented in our work.…”

Section: Related Workmentioning

confidence: 99%

Performance prediction for OFDMA systems with dynamic power and subcarrier allocation

Gross¹,

Reyer²

2011

Computer Communications

View full text Add to dashboard Cite

It is well known that channel-dependent OFDMA resource assignment algorithms provide a significant performance improvement compared to static (i.e., channel-unaware) approaches. Such dynamic algorithms constantly adapt resource assignments to current channel states according to some objective function. Due to these dynamics, it is difficult to predict the resulting performance for such schemes given a certain scenario (characterized by the number of terminals in the cell and their average channel gains). In this paper we provide a novel, analytical framework for performance prediction, which takes dynamic power and subcarrier allocation into account. The analysis is based on fundamental transformations of the channel gains caused by the dynamic subcarrier allocations. This insight allows for deriving probability functions of the achieved rate per subcarrier which ultimately yields expressions for the expected minimal rates as well as outage probabilities for certain rate demands. Hence, the methods presented in this paper for performance prediction can be employed for admission control in systems with dynamic resource allocation. We illustrate the applicability of our derivations with respect to the capacity of 802.16e systems for Voice-over-IP and video streams. The results demonstrate a significant improvement compared to state-of-the art approaches but also reveal room for improvement of this approach compared to the optimal system performance.

show abstract

“…A number of papers propose a weak type of coordination in which CAC admits voice users subject to available capacity and RA attempts to maximize the total utility of data users subject to performance constraints on voice users, see, e.g., [13].…”

Section: Introductionmentioning

confidence: 99%

A Novel Coordinated Connection Access Control and Resource Allocation Framework for 4G Wireless Networks

Yang

Jordan

2015

IEEE/ACM Trans. Networking

View full text Add to dashboard Cite

Abstract-In the academic literature on cellular network design, resource allocation algorithms often attempt to maximize total utility or throughput over a short time period, and connection access control often admits arrivals if and only if there are sufficient resources. In this paper, we investigate how connection access control and resource allocation can be coordinated to jointly achieve maximum total utility. We propose a decomposition in which resource allocation maximizes long-term average utility for each system state, and connection access control maximizes long-term average utility over all system states. We discuss the resulting interface and give examples of algorithms that satisfy this decomposition and interface. Simulation results illustrate that the optimal connection access control policy may block applications with relatively low average utility per unit rate even when capacity is available, and that coordinated connection access control and resource allocation can outperform uncoordinated approaches.

show abstract

Admission control and resource allocation in a heterogeneous OFDMA wireless network

Cited by 44 publications

References 21 publications

Solving resource allocation problems in cognitive radio networks: a survey

Solving resource allocation problems in cognitive radio networks: a survey

Performance prediction for OFDMA systems with dynamic power and subcarrier allocation

A Novel Coordinated Connection Access Control and Resource Allocation Framework for 4G Wireless Networks

Contact Info

Product

Resources

About