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首页> 外文期刊>Canadian journal of electrical and computer engineering >User mobility support in an urban CDMA-based wireless network
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User mobility support in an urban CDMA-based wireless network

机译：基于城市CDMA的无线网络中的用户移动性支持

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摘要

A salient feature of wireless networks is the ability to support user roaming. However, user mobility has a profound effect on grade of service (GoS) and quality of service (QoS) provisioning. Code division multiple access (CDMA) is the multiple access technology for the third-generation wireless standard (3G) and is envisioned to be the multiple access technology beyond 3G. CDMA is interference-limited. The signal-to-interference (SIR) ratio, expressible in the form of E_b/I_o, is an important parameter in CDMA systems and has a profound effect on the system capacity. The system capacity in turn affects the call-level GoS of the network layer in terms of new call blocking probability and forced termination probability. The effect of user mobility on (ⅰ) degradation in utilization and (ⅱ) excess capacity needed to satisfy the QoS/GoS requirements, in an urban environment, is examined and quantified. A relationship between the link-layer E_b/I_o specification and the call-level GoS parameters in the presence of user mobility is also established. Numerical results which display the linkages between the link-layer QoS and call-level GoS parameters are presented and discussed. This coupling gives a quantification of the link-layer requirement to provision the call-level GoS, in the presence of user mobility.
机译：无线网络的显着特征是支持用户漫游的能力。但是，用户移动性会对服务等级（GoS）和服务质量（QoS）设置产生深远影响。码分多址（CDMA）是用于第三代无线标准（3G）的多址技术，并且可以预见它是3G以外的多址技术。 CDMA受干扰限制。以E_b / I_o的形式表示的信干比（SIR）是CDMA系统中的重要参数，并且对系统容量有深远的影响。系统容量进而从新的呼叫阻塞概率和强制终止概率方面影响网络层的呼叫级别GoS。在城市环境中，对用户移动性对（ⅰ）利用率下降和（ⅱ）满足QoS / GoS要求所需的多余容量的影响进行了检查和量化。还建立了在存在用户移动性的情况下链路层E_b / I_o规范与呼叫级GoS参数之间的关系。数值结果显示并讨论了链路层QoS和呼叫级GoS参数之间的联系。在存在用户移动性的情况下，这种耦合可量化链路层需求以提供呼叫级GoS。

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