集中式CAPWAP网络架构系统的设计与实现

发布时间：2018-11-03 13:00

【摘要】：随着无线局域网的快速发展，无线网络的覆盖范围和规模不断扩大，已经被企业、学校、家庭、医院、机场等场所广泛应用。传统的无线网络以自治式无线接入点（AP，，Access Point）为主体，俗称“胖”AP。而日益增长的无线接入点面临着管理困难、缺乏控制以及扩展性差的问题，已经越来越无法满足客户的需求。为此，一种新型的集中式无线网络架构应运而生并成为当下的主流。该结构让无线控制器（AC，Access Controller）集中式的管理和控制无线接入点，无线控制器很大程度上分担或代替了原来自治式无线接入点的功能，使得精简后的无线接入点（即“瘦”AP，FitAP）易于管理和控制，并且扩展性好。互联网工程任务组IETF起草的无线接入点控制与配置（CAPWAP）协议，就是用于规范AP与AC之间的通信标准。针对企业级无线局域网的业务需求，在原CAPWAP协议的架构基础之上，结合《中国移动WLAN_AC-AP接口互通规范-基本协议》的要求，对无线接入点控制与配置协议以及集中式无线网络架构进行深入剖析，对状态机的流程进行了优化，给出了无线接入点与无线控制器之间通信行为的设计思路。无线控制器作为网络实体，能够对多个无线接入点进行管理、协调分担802.11的各种业务以及对无线接入点进行集中配置。同时也对无线接入点网络控制报文的发送方式和组织形式进行了详细设计，使其适应无线控制器的集中式管理。通过实验组网测试的结果与分析表明，Fit AP不仅能很好的实现业务需求，还能准确的实现各项改进功能，适合通信公司与中国移动大规模无线局域网组网的业务需求。
[Abstract]:With the rapid development of WLAN, wireless network has been widely used in enterprises, schools, families, hospitals, airports and so on. Traditional wireless networks are dominated by autonomous wireless access points (AP,Access Point), commonly known as "fat" AP. However, the growing number of wireless access points is facing the problems of difficult management, lack of control and poor scalability, which has become increasingly unable to meet the needs of customers. Therefore, a new centralized wireless network architecture emerged as the times require and become the mainstream. This architecture allows the centralized management and control of wireless access points by the wireless controller (AC,Access Controller), which largely shares or replaces the functions of the original autonomous wireless access points. It makes the reduced wireless access point (i.e. "thin" AP,FitAP) easy to manage and control, and has good expansibility. The Wireless access Point Control and configuration (CAPWAP) protocol drafted by the Internet Engineering Task Force (IETF) is used to standardize the communication standard between AP and AC. According to the business requirements of enterprise WLAN, based on the original CAPWAP protocol architecture, combined with the requirements of China Mobile WLAN_AC-AP Interface Interoperability Specification-basic Protocol, The control and configuration protocol of wireless access point and the centralized wireless network architecture are deeply analyzed, the flow of state machine is optimized, and the design idea of communication behavior between wireless access point and wireless controller is given. As a network entity, the wireless controller can manage multiple wireless access points, coordinate and share all kinds of services of 802.11, and configure the wireless access points centrally. At the same time, the sending mode and organization of wireless access point network control message are designed in detail to adapt to the centralized management of wireless controller. The results and analysis of the experimental networking test show that, Fit AP can not only meet the business requirements, but also accurately realize all the improved functions, which is suitable for the communication company and China Mobile large-scale WLAN network.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN925.93

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