LTE与WLAN网络融合中业务分流机制的研究
发布时间：2018-10-15 18:34
【摘要】：随着移动终端数量的增加,和用户不断增长的对视频业务等高速率业务的需求,单一的无线通信技术不再能满足用户的通信需要。LTE和WLAN两种无线网络技术在覆盖范围、吞吐量、开销和移动性支持等方面上具有不同的特性。通过LTE与WLAN网络融合,可以使用户同时获得两种技术带来的好处。LWA作为3GPP最新提出的异构网络融合架构之一,以eNB作为分流锚点,可以将部分LTE的业务分流给WLAN。本文主要基于LWA进行协议设计和分流算法改进,实现有效的业务分流。本文首先提出了一种新型MAC复用方法和系统,避免高优先级的分裂承载占用低优先级非分裂承载的上行传输资源。然后提出了一种分布式的适用于LWA的接入点选择方法ACSM,在多模终端进行选择LTE小区时考虑与之关联的WLAN侧的网络性能,并通过改进TOPSIS算法,为用户提供满足多种偏好的小区选择。最后提出了一种异构网络中的带宽分配方法,为不同业务建立不同的效用模型,通过网络侧和用户侧的相互迭代和少量的信令交互实现最优的带宽分配。本文还搭建了 LWA系统仿真平台,验证了本文所提算法。
[Abstract]:With the increase of the number of mobile terminals and the increasing demand of users for high-speed services such as video services, a single wireless communication technology can no longer meet the communication needs of users. LTE and WLAN wireless network technology in the coverage, throughput, Overhead and mobility support have different characteristics. Through the integration of LTE and WLAN network, users can get the benefits of the two technologies at the same time. As one of the latest heterogeneous network convergence architecture proposed by 3GPP, LWA can distribute part of the LTE services to WLAN. with eNB as the streaming anchor. This paper mainly based on LWA protocol design and shunt algorithm improvement to achieve effective service streaming. In this paper, a new MAC multiplexing method and system is proposed to avoid the high priority splitting load from occupying the uplink transmission resource with low priority and non-splitting load. Then, a distributed access point selection method suitable for LWA is proposed. ACSM, considers the network performance of the associated WLAN side when selecting LTE cells at multi-mode terminals, and improves the TOPSIS algorithm. To provide users with a variety of preferences to meet the cell selection. Finally, a bandwidth allocation method in heterogeneous networks is proposed, which establishes different utility models for different services, and achieves optimal bandwidth allocation through iteration between network side and user side and a small amount of signaling interaction. The LWA system simulation platform is also built to verify the proposed algorithm.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.5;TN925.93
本文编号：2273458
[Abstract]:With the increase of the number of mobile terminals and the increasing demand of users for high-speed services such as video services, a single wireless communication technology can no longer meet the communication needs of users. LTE and WLAN wireless network technology in the coverage, throughput, Overhead and mobility support have different characteristics. Through the integration of LTE and WLAN network, users can get the benefits of the two technologies at the same time. As one of the latest heterogeneous network convergence architecture proposed by 3GPP, LWA can distribute part of the LTE services to WLAN. with eNB as the streaming anchor. This paper mainly based on LWA protocol design and shunt algorithm improvement to achieve effective service streaming. In this paper, a new MAC multiplexing method and system is proposed to avoid the high priority splitting load from occupying the uplink transmission resource with low priority and non-splitting load. Then, a distributed access point selection method suitable for LWA is proposed. ACSM, considers the network performance of the associated WLAN side when selecting LTE cells at multi-mode terminals, and improves the TOPSIS algorithm. To provide users with a variety of preferences to meet the cell selection. Finally, a bandwidth allocation method in heterogeneous networks is proposed, which establishes different utility models for different services, and achieves optimal bandwidth allocation through iteration between network side and user side and a small amount of signaling interaction. The LWA system simulation platform is also built to verify the proposed algorithm.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.5;TN925.93
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，本文编号：2273458
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