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Utility-based power control for packet-switched wireless networks.

机译：分组交换无线网络的基于实用程序的功率控制。

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摘要

Efficient management of radio resources is crucial in maintaining peak performance of cellular wireless networks under resources constraints. As wireless networks evolve toward 3G/4G and beyond with broadband multimedia services, managing radio resources to satisfy diverse Quality-of-Service requirements is becoming even more critical. Battery energy conservation for portable terminals on the move is another important aspect in wireless networks. Due to the limit on battery life-time, each unit of battery energy saved directly translates to an increase in the value of communication for a subscriber.;In this work, we investigate a uplink power control problem for packet-switched data services, with a focus on energy efficiency for mobile terminals. Packet-switched data differ fundamentally from circuit-switched data in the burstiness of traffic and the connectionless nature of communications. Based on a utility-maximization approach from microeconomics, we define a probabilistic utility model as a performance metric for a wireless data user, which takes into account both the traffic burstiness and average packet delay requirement. Game-theoretic approach is then utilized to study a distributed power control strategy to simultaneously maximize the utility for each individual user in the system.;In general, the problem is mathematically intractable. Using several approximation methods, the problem is reduced into tractable format and is studied both analytically and by simulations. Results show that the proposed power control scheme converges to a unique Nash equilibrium which depends on mobile's location, average packet delay requirement, traffic burstiness, and the mean and variance of the interference and background noise at mobile's base station receiver. The scheme can be easily extended to multi-class user traffic environments.;For performance evaluation, we establish two idealized slot-by-slot based power control strategies as performance benchmarks. It's shown that the performance achieved by the proposed scheme is close to those by benchmark schemes. Generally, this work provides a new approach based on approximation techniques for the investigation of uplink power control problem in packet-switched systems. The results and insights generated by this study provide guidance on the efficient management of transmit powers for energy-efficient packet-switched data services in current and future generations of wireless networks.
机译：无线电资源的有效管理对于在资源限制下保持蜂窝无线网络的最佳性能至关重要。随着无线网络通过宽带多媒体服务向3G / 4G演进，对无线资源进行管理以满足各种服务质量要求变得越来越重要。在移动网络中，为便携式终端节省电池电量是无线网络的另一个重要方面。由于电池寿命的限制，节省的每单位电池能量直接转化为用户通信价值的增加。在这项工作中，我们研究了分组交换数据服务的上行链路功率控制问题，关注移动终端的能源效率。数据包交换的数据与电路交换的数据的根本区别在于流量的突发性和通信的无连接性质。基于微观经济学的效用最大化方法，我们将概率效用模型定义为无线数据用户的性能指标，该模型同时考虑了流量突发性和平均数据包延迟要求。然后，使用博弈论方法研究分布式电源控制策略，以同时最大化系统中每个用户的效用。总的来说，该问题在数学上是棘手的。使用几种近似方法，该问题被简化为易于处理的形式，并通过分析和仿真进行了研究。结果表明，所提出的功率控制方案收敛于一个唯一的纳什均衡，该均衡取决于移动台的位置，平均分组延迟要求，业务突发性以及移动台基站接收器的干扰和背景噪声的均值和方差。该方案可以轻松地扩展到多类用户流量环境。为了进行性能评估，我们建立了两种基于插槽的理想化电源控制策略作为性能基准。结果表明，所提出的方案所实现的性能接近于基准方案。通常，这项工作提供了一种基于近似技术的新方法，用于研究分组交换系统中的上行链路功率控制问题。这项研究产生的结果和见解为当前和未来无线网络中的节能分组交换数据服务的发射功率的有效管理提供了指导。

著录项

  • 作者

    Lei, Zhuyu.;

  • 作者单位

    Rutgers The State University of New Jersey - New Brunswick.;

  • 授予单位 Rutgers The State University of New Jersey - New Brunswick.;
  • 学科 Engineering Electronics and Electrical.;Computer Science.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 232 p.
  • 总页数 232
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;自动化技术、计算机技术;
  • 关键词

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