第三代移动通信系统无线资源分配优化策略的研究
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摘要
随着移动通信的发展，移动通信用户数和Internet用户数急剧增加，人们期望新一代移动通信系统不仅具有更大的容量，还要支持移动多媒体业务，除了提供话音业务外，还支持低/高速数据、图象等非话音业务的传输。不同业务有不同的服务质量(QoS)要求，如对时延、误比特率、数据速率的要求不同。
无线蜂窝网络设计有两大目标：一是保证各类业务的QoS要求，一是使网络的资源利用率达到最大，这需要借助于无线资源管理。由于第三代移动通信系统主要是自干扰系统，其容量受干扰的限制，需要合理地分配系统的资源。第三代移动通信系统的无线资源管理主要包括呼叫允许控制、切换控制、功率控制、拥塞控制、分组调度等。本文重点研究了CDMA移动通信系统的呼叫接入控制、CDMA系统软切换控制、拥塞控制等。
针对3G移动通信系统支持多媒体业务的特点，提出了一种新的CDMA系统的综合业务接入控制方案模型。根据网络中不同传输业务的不同QoS要求，将业务分成软切换业务，语音业务和M级数据业务。在移动台提出业务发送请求后，用基站的广播信号作为同步信息，把业务送到无线信道，很好地解决了综合业务的冲突问题。当负载发生碰撞时，全部重叠；不发生碰撞时全部存在。网络开通时，在保证软切换业务全部得到服务的基础上，基站周期读取小区状态，决定语音业务及各级数据业务的入网概率。理论分析与计算机仿真结果表明：该接入控制方案有效地保证了软切换最低切换失败概率，改善了话音业务、一级数据业务及各级数据业务的服务质量，从而提高系统的服务质量，保证了整个系统的工作性能。
针对CDMA移动通信系统的特点，提出了一种基于双时钟的CDMA移动通信网络拥塞“软”处理方法。系统通过实时监测网络信干比SIR_k与门限SIR_(req)比值，判断网络的工作情况。根据网络不同的拥塞程度，开启不同的控制时间片(双时钟)，缓解网络拥塞，保证网络正常工作。仿真结果表明：该拥塞控制方法硬件实现简单，并能动态分配移动通信网络资源，及时缓解、解除网络拥塞，使系统能稳定工作，有效地保证了移动通信网络的服务质量，且具有缓解拥塞时间短、呼叫等待处理时间短和呼损率低等特点。
针对CDMA移动通信系统的特点，提出了融于速率控制策略的蜂窝移动
With the development of mobile communications, mobile users and Internet users are increasing dramatically. People expect that next generation mobile communication systems can provide larger capacity and support mobile multimedia services. Besides providing real-time speech service, next generation mobile communication systems are required to support non real-time services such as low/high rate data, pictures etc. Heterogeneous services have different quality of service (QoS) requirements, for example, the requirements of time delay, error bit rate, and transmission rate for heterogeneous services are difference.
There are two main objects for wireless network design, one is to guarantee QoS requirements of heterogeneous services, and the other is to make resource utilization maximized. This recurs to radio resource management (RRM). CDMA system is a self-interfered one, the capacity of which is limited by co-channel interference. It's necessary to assign system resources reasonably. Radio resource management for the third generation mobile communication systems includes call admission control, handoff control, power control, load control and packet scheduling. This dissertation pays attention on call admission control, handoff control, power control and load control for mobile multimedia communication systems.
Aim for the peculiarity of 3G system that can transmit multi-traffic, a CDMA systems call admission control policy for multi-services wireless cellular mobile system has been proposed. The traffic is branched out into handoff traffic, voice traffic and M class data traffic in light the difference QoS. After the mobile station ask to send information, the basic station will send the information to wireless channel with the BS's conveyance single as the synchronize information. The crisis questions will be copied with very good. When the loads crisis, all the traffic will overlap; When the loads don not crisis, and all the traffic will exist. When the network is open, the handoff calls are all serviced, and the
无线蜂窝网络设计有两大目标：一是保证各类业务的QoS要求，一是使网络的资源利用率达到最大，这需要借助于无线资源管理。由于第三代移动通信系统主要是自干扰系统，其容量受干扰的限制，需要合理地分配系统的资源。第三代移动通信系统的无线资源管理主要包括呼叫允许控制、切换控制、功率控制、拥塞控制、分组调度等。本文重点研究了CDMA移动通信系统的呼叫接入控制、CDMA系统软切换控制、拥塞控制等。
针对3G移动通信系统支持多媒体业务的特点，提出了一种新的CDMA系统的综合业务接入控制方案模型。根据网络中不同传输业务的不同QoS要求，将业务分成软切换业务，语音业务和M级数据业务。在移动台提出业务发送请求后，用基站的广播信号作为同步信息，把业务送到无线信道，很好地解决了综合业务的冲突问题。当负载发生碰撞时，全部重叠；不发生碰撞时全部存在。网络开通时，在保证软切换业务全部得到服务的基础上，基站周期读取小区状态，决定语音业务及各级数据业务的入网概率。理论分析与计算机仿真结果表明：该接入控制方案有效地保证了软切换最低切换失败概率，改善了话音业务、一级数据业务及各级数据业务的服务质量，从而提高系统的服务质量，保证了整个系统的工作性能。
针对CDMA移动通信系统的特点，提出了一种基于双时钟的CDMA移动通信网络拥塞“软”处理方法。系统通过实时监测网络信干比SIR_k与门限SIR_(req)比值，判断网络的工作情况。根据网络不同的拥塞程度，开启不同的控制时间片(双时钟)，缓解网络拥塞，保证网络正常工作。仿真结果表明：该拥塞控制方法硬件实现简单，并能动态分配移动通信网络资源，及时缓解、解除网络拥塞，使系统能稳定工作，有效地保证了移动通信网络的服务质量，且具有缓解拥塞时间短、呼叫等待处理时间短和呼损率低等特点。
针对CDMA移动通信系统的特点，提出了融于速率控制策略的蜂窝移动
With the development of mobile communications, mobile users and Internet users are increasing dramatically. People expect that next generation mobile communication systems can provide larger capacity and support mobile multimedia services. Besides providing real-time speech service, next generation mobile communication systems are required to support non real-time services such as low/high rate data, pictures etc. Heterogeneous services have different quality of service (QoS) requirements, for example, the requirements of time delay, error bit rate, and transmission rate for heterogeneous services are difference.
There are two main objects for wireless network design, one is to guarantee QoS requirements of heterogeneous services, and the other is to make resource utilization maximized. This recurs to radio resource management (RRM). CDMA system is a self-interfered one, the capacity of which is limited by co-channel interference. It's necessary to assign system resources reasonably. Radio resource management for the third generation mobile communication systems includes call admission control, handoff control, power control, load control and packet scheduling. This dissertation pays attention on call admission control, handoff control, power control and load control for mobile multimedia communication systems.
Aim for the peculiarity of 3G system that can transmit multi-traffic, a CDMA systems call admission control policy for multi-services wireless cellular mobile system has been proposed. The traffic is branched out into handoff traffic, voice traffic and M class data traffic in light the difference QoS. After the mobile station ask to send information, the basic station will send the information to wireless channel with the BS's conveyance single as the synchronize information. The crisis questions will be copied with very good. When the loads crisis, all the traffic will overlap; When the loads don not crisis, and all the traffic will exist. When the network is open, the handoff calls are all serviced, and the
引文
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