Power and rate allocation for video conferencing in cellular networks

Yang, Chao; Jordan, Scott

doi:10.1186/1687-1499-2013-31

Cited by 5 publications

(11 citation statements)

References 27 publications

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“…The Lagrange is (4) where , are the Lagrangian multipliers associated with the rate constraints which are interpreted as rate prices [29], and are the Lagrangian multipliers associated with the power constraints.…”

Section: A Resource Allocationmentioning

confidence: 99%

“…The utility function for a classapplication is if else where is also expressed in units of 100 kb/s, , , , kb/s, , , , kb/s. Both utility functions are sigmoid [29]; we set the minimum rate requirements to the rate at the maximum average utility, which is given by kb/s and kb/s. The arrival processes are Poisson processes with intensities and , respectively, and the connection durations are exponentially distributed with means s and s, respectively.…”

Section: A Two Semi-elastic Classesmentioning

confidence: 99%

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

Yang

Jordan

2015

IEEE/ACM Trans. Networking

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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.

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Section: A Resource Allocationmentioning

confidence: 99%

Section: A Two Semi-elastic Classesmentioning

confidence: 99%

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

Yang

Jordan

2015

IEEE/ACM Trans. Networking

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“…MPEG, utility should be represented as a sigmoid function of the average rate over each group-of-pictures [11]. Thus the algorithms in [3][4] [5][6] [7] are not suitable to video conferencing.…”

Section: Introductionmentioning

confidence: 99%

“…A key resource allocation design problem consists of how to consider a user's current channel and likely future channels. In [11], we considered the case in which utility is a sigmoid function of the average bit rate over multiple time slots, motivated by video conferencing, and showed that greedy allocation to maximize incremental utility in the current time slot can be implemented in a distributed fashion by an exchange of price and demand amongst users, the network, and an intermediate power allocation module. We proposed resource allocation that considers both the average rate achieved so far and the future expected rate, and showed how the future expected rate can be estimated by modeling the probability that a user will be allocated a subcarrier in a future time slot.…”

Section: Introductionmentioning

confidence: 99%

“…This calls for an approach to resource allocation that considers both utility and outage based on the average rate over the groupof-pictures. None of the prior literature on resource allocation for video using sigmoid utility functions, including our prior papers [7] and [11], considered outage. The existence of an outage constraint poses a challenge to resource allocation.…”

Section: Introductionmentioning

confidence: 99%

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Resource Allocation for Semi-Elastic Applications With Outage Constraints in Cellular Networks

Yang

Jordan

2015

IEEE Trans. Veh. Technol.

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Abstract-We consider resource allocation for semi-elastic applications, such as mobile video-conferencing, which require a maximum outage. We represent the performance of a session by a sigmoid utility function of the average bit rate over a time window consisting of many slots. The goal is to maximize the total expected utility of all active users. A principal challenge is the difference in time scales: outage is measured over sessions while average bit rate is measured over a time window such as a group of pictures. We propose that these differences in time scale can be elegantly addressed by shadow prices: a price per unit average rate over each time window and a price per unit outage. We further propose that the price per unit average rate depends on combined pathloss and shadowing, but not on fast fading. We show that resources can be efficiently allocated if the base station chooses prices based on total demand and the users respond by choosing average rates. The performance of our algorithm is illustrated by simulation results.

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Optimal downlink power allocation in cellular networks

Abdelhadi

Khawar

Clancy

2015

Physical Communication

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In this paper, we introduce a novel approach for power allocation in cellular networks. In our model, we use sigmoidal-like utility functions to represent different users' modulation schemes. Each utility function is a representation of the probability of successfully transmitted packets per unit of power consumed by a user, when using a certain modulation scheme. We consider power allocation with utility proportional fairness policy, where the fairness among users is in utility percentage i.e. percentage of successfully transmitted packets of the corresponding modulation scheme. We formulate our network utility maximization problem as a product of utilities of all users and prove that our power allocation optimization problem is convex and therefore the optimal solution is tractable. We present a distributed algorithm to allocate base station (BS) powers optimally with priority given to users running lower modulation schemes while ensuring non-zero power allocation to users running higher modulation schemes.Our algorithm prevents fluctuation in the power allocation process and is capable of traffic and modulation dependent pricing i.e. charges different price per unit power from different users depending in part on their modulation scheme and total power available at the BS. This is used to flatten traffic and decrease the service price for users.

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Power and rate allocation for video conferencing in cellular networks

Cited by 5 publications

References 27 publications

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

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

Resource Allocation for Semi-Elastic Applications With Outage Constraints in Cellular Networks

Optimal downlink power allocation in cellular networks

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