A subcarrier allocation algorithm for OFDMA using buffer and channel state information

Parag, Parimal; Bhashyam, Srikrishna; Aravind, R.

doi:10.1109/vetecf.2005.1557987

Cited by 49 publications

(39 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Modulated versions of this metric are used in non-relaying OFDMA [5] and SDMA/TDMA [6] networks. Although our results show outstanding performance employing the earlier metric definition, designing the mathematical structure of the metric is an interesting problem by itself, since different emphasizes can be imposed on the rate and link weight arguments.…”

Section: The Bs's Joint Routing and Fair Schedulingmentioning

confidence: 99%

Fairness-aware radio resource management in downlink OFDMA cellular relay networks

Salem

Adinoyi

Rahman

et al. 2010

IEEE Trans. Wireless Commun.

112

View full text Add to dashboard Cite

Abstract-Relaying and orthogonal frequency division multiple access (OFDMA) are the accepted technologies for emerging wireless communications standards. The activities in many wireless standardization bodies and forums, for example IEEE 802.16 j/m and LTE-Advanced, attest to this fact. The availability or lack thereof of efficient radio resource management (RRM) could make or mar the opportunities in these networks. Although distributed schemes are more attractive, it is essential to seek outstanding performance benchmarks to which various decentralized schemes can be compared. Therefore, this paper provides a comprehensive centralized RRM algorithm for downlink OFDMA cellular fixed relay networks in a way to ensure user fairness with minimal impact on network throughput. In contrast, it has been observed that pure opportunistic schemes and fairness-aware schemes relying solely on achievable and allocated capacities may not attain the desired fairness, e.g., proportional fair scheduling. The proposed scheme is queueaware and performs three functions jointly; dynamic routing, fair scheduling, and load balancing among cell nodes. We show that the proposed centralized scheme is different from the traditional centralized schemes in terms of the substantial savings in complexity and feedback overhead.

show abstract

Section: The Bs's Joint Routing and Fair Schedulingmentioning

confidence: 99%

Fairness-aware radio resource management in downlink OFDMA cellular relay networks

Salem

Adinoyi

Rahman

et al. 2010

IEEE Trans. Wireless Commun.

112

View full text Add to dashboard Cite

show abstract

“…Variation of M-LWDF [66], [67], [68], [69] Meet the throughput and delay guarantee with threshold probability ertPS, rtPS and nrtPS…”

Section: Discussionmentioning

confidence: 99%

“…For example, in [67], the scheduler selects the users on each subcarrier during every time slot. For each subcarrier k, the user (i) selection for the subcarrier is expressed by…”

Section: ) Fairnessmentioning

confidence: 99%

Scheduling in IEEE 802.16e mobile WiMAX networks: key issues and a survey

So-In

Jain

Al-Tamimi

2009

IEEE J. Select. Areas Commun.

290

182

View full text Add to dashboard Cite

Abstract-Interest in broadband wireless access (BWA) has been growing due to increased user mobility and the need for data access at all times. IEEE 802.16e based WiMAX networks promise the best available quality of experience for mobile data service users. Unlike wireless LANs, WiMAX networks incorporate several quality of service (QoS) mechanisms at the Media Access Control (MAC) level for guaranteed services for data, voice and video. The problem of assuring QoS is basically that of how to allocate available resources among users in order to meet the QoS criteria such as delay, delay jitter and throughput requirements. IEEE standard does not include a standard scheduling mechanism and leaves it for implementer differentiation. Scheduling is, therefore, of special interest to all WiMAX equipment makers and service providers. This paper discusses the key issues and design factors to be considered for scheduler designers. In addition, we present an extensive survey of recent scheduling research. We classify the proposed mechanisms based on the use of channel conditions. The goals of scheduling are to achieve the optimal usage of resources, to assure the QoS guarantees, to maximize goodput and to minimize power consumption while ensuring feasible algorithm complexity and system scalability.

show abstract

“…Several throughputoptimal RRA algorithms have been proposed thereafter for non-OFDMA and/or non-relaying networks with different optimization problems. In [56] and [57], modulated versions of this metric are used in conventional cellular Space Division Multiple Access/TDMA and OFDMA networks, respectively. Generally, queue awareness allows RRM schemes to take corrective actions in following allocation frames to compensate the overlooked user buffers, if any, and potentially improve fairness among homogenous traffic flows, at least in the long term.…”

Section: Fairness Implementation In Rra Algorithmsmentioning

confidence: 99%

Opportunities and Challenges in OFDMA-Based Cellular Relay Networks: A Radio Resource Management Perspective

Salem

Adinoyi²,

Yanıkömeroğlu

et al. 2010

IEEE Trans. Veh. Technol.

View full text Add to dashboard Cite

Abstract-The opportunities and flexibility in relay networks and orthogonal frequency-division multiple access (OFDMA) make the combination a suitable candidate network and air-interface technology for providing reliable and ubiquitous high-data-rate coverage in next-generation cellular networks. Advanced and intelligent radio resource management (RRM) schemes are known to be crucial toward harnessing these opportunities in future OFDMA-based relay-enhanced cellular networks. However, it is not very clear how to address the new RRM challenges (such as enabling distributed algorithms, intra-cell/inter-cell routing, intense and dynamic co-channel interference (CCI), and feedback overhead) in such complex environments comprising a plethora of relay stations (RSs) of different functionalities and characteristics. Employment of conventional RRM schemes in such networks will highly be inefficient if not infeasible. The next-generation networks are required to meet the expectations of all wireless users, irrespective of their locations. High-data-rate connectivity, mobility, and reliability, among other features, are examples of these expectations. Therefore, fairness is a critical performance aspect that has to be taken into account in the design of prospective RRM schemes. This paper reviews some of the prominent challenges involved in migrating from the conventional cellular architecture to the relay-based type and discusses how intelligent RRM schemes can exploit the opportunities in relay-enhanced OFDMA-based cellular networks. We identify the role of multiantenna systems and explore the current approaches in literature to extend the conventional schedulers to next-generation relay networks. This paper also highlights the fairness aspect in such networks in the light of the recent literature, provides some example fairness metrics, and compares the performances of some representative algorithms.

show abstract

A subcarrier allocation algorithm for OFDMA using buffer and channel state information

Cited by 49 publications

References 13 publications

Fairness-aware radio resource management in downlink OFDMA cellular relay networks

Fairness-aware radio resource management in downlink OFDMA cellular relay networks

Scheduling in IEEE 802.16e mobile WiMAX networks: key issues and a survey

Opportunities and Challenges in OFDMA-Based Cellular Relay Networks: A Radio Resource Management Perspective

Contact Info

Product

Resources

About