Power Control and Call Admission Policies for Multiclass Traffic in SIR-Based Power-Controlled DS-CDMA Cellular Networks

基于 SIR 的功率控制 DS-CDMA 蜂窝网络中多类流量的功率控制和呼叫准入策略

• 批准号: 0203063
• 负责人: Derong Liu
• 金额: $ 30万
• 依托单位: University of Illinois at Chicago
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-07-01 至 2005-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0203063&HistoricalAwards=false
• 关键词: Power; Control; Call; Admission; Policies

This project aims at studying problems fundamental in cellular networks and specifically related to the call admission control schemes. Efficient call admission control schemes provide the users with access to wireless networks and at the same time are crucial for network operators in guaranteeing services and operating efficiently. In this three-year project, the following research activities will be particularly pursued. First, a novel call admission control algorithms for signal-to-interference ratio (SIR) based power-controlled direct sequence code division multiple access (DS-CDMA) cellular networks that provide multiple classes of services will be developed. When a new call (or a handoff call) arriving at a base station requesting for admission, the new, desired, power level for that new call as well as the power levels for all existing calls will be calculated. These calculations are based on the interference received at the base station and the desired quality of service target (i.e., the desired SIR) for each call. In the case of a higher priority calls, e.g. handoff calls, different thresholds for new calls and handoff calls can be allowed. The research within this project will particularly focus on the admission control decision based on a computationally tractable calculation of the target power level, which would avoid the iterative process of power control for determination of the required power levels for all users. Finally, power control algorithms with vigorous theoretical results regarding stability, convergence, and feasibility of solutions will also be studied for the best applicability in future cellular networks. This project will include graduate and undergraduate students in research and will be conducted as means of creating awareness and interest among students on the issues surrounding wireless networks.

本项目旨在研究蜂窝网络中的基本问题，特别是与呼叫接纳控制方案相关的问题。高效的呼叫接纳控制方案为用户提供无线网络接入，同时也是网络运营商保障业务和高效运营的关键。在这个为期三年的项目中，将特别进行以下研究活动。首先，将开发一种新的基于信号干扰比（SIR）的功率控制直接序列码分多址（DS-CDMA）蜂窝网络的呼叫接纳控制算法，该网络提供多种服务。当一个新呼叫（或切换呼叫）到达请求进入的基站时，将计算该新呼叫所需的新功率电平以及所有现有呼叫的功率电平。这些计算是基于基站接收到的干扰和每个呼叫的期望服务质量目标（即期望的SIR）。对于更高优先级的呼叫，例如切换呼叫，可以允许不同的新呼叫和切换呼叫阈值。本项目的研究将特别侧重于基于可计算的目标功率水平计算的准入控制决策，这将避免为确定所有用户所需功率水平而进行功率控制的迭代过程。最后，功率控制算法在稳定性、收敛性和解决方案的可行性方面也将得到有力的理论结果，以便在未来的蜂窝网络中得到最佳的应用。该项目将包括研究生和本科生参与研究，并将作为提高学生对无线网络问题的认识和兴趣的手段。