Research On The Key Technologies Of Distributed Mobility Management For ID/Locator Separation Mechanism

In the traditional Internet protocol architecture, IP address with identity and location dual semantics leads to dramatically drawback in the aspects of routing scal-ability, mobility and security. ID/Locator separation mechanism is to split the dual semantics of IP address, and now it has been gradually accepted by scholars as one of the hot investigation in future Internet research field. Although supporting mobility is the natural benefit of ID/Locator, the efficient mobility management is still the key technical issue. Currently mobility management has started the evolution from centralized to distributed to alleviate the effects of rapid growth of data traffic. The thesis is to do research on the key technology issue of distributed mobility management based on ID/Locator separation. The main contributions are summarized as follows:1. To analyze the applicable scenario and the applied mode of distributed mobility management scheme, the thesis proposes an analytical method based on flow duration, as well as analytical model. According to the process procedure of mo-bility anchor after handover occurred, distributed mobility management scheme can be divided into two types:multiple layer tunnel mode and direct tunnel mode. Two new parameters which are ratio of flows encapsulated in tunnel (R) and flow delivery cost are introduced to evaluate the performance of distributed mobility management scheme. For analysis purpose, the real Internet data is dumped from campus network edge router to obtain statistical feature of Inter-net flow such as Cumulative distribution function. Performance analysis results show that, distributed mobility management is more applicable to low-speed sce-nario which leads to seldom frequent handover, and the direct tunnel mode is more efficient than the multiple layer tunnel mode.2. To overcome the disadvantage caused by extremely grown of mobile traffic vol-ume in the traditional mobility management schemes, the thesis proposes a new distributed mobility management scheme, which follows the direct tunnel mode, based on control and data plane separation. The main idea is to split the tra-ditional mobility anchor into two parts:control plane anchor and data plane anchor. A single control anchor can manage many data plane anchor to forward traffic volume within the domain. Since the mobility access gateway should choose data plane mobility anchor for every accessed MN, a data plane anchor selection algorithm is also introduced. On comparison between the new proposed scheme and traditional mobility management scheme, performance analysis is based on system capacity, handover delay and packets delivery cost.3. Considering the poor scalability of traditional mobile Internet and the disadvan-tage of double binding of use’s identifier and location, the thesis proposes the architecture of mobile Internet supported for separation mechanism. The archi-tecture divide the Internet into access network and core network, to achieve the separation of identifier and location separation, the separation of control plane and data plane as well as the separation of access and core network. To lever-age the proven proxy IPv6technology to provide users with mobile services, the main idea of architecture is to integrate the network based mobility manage-ment scheme proxy mobile IPv6into the access network of Universal Identifier Networks; however the separation mapping mechanism is implemented between access network and core network. The prototype of such mobile Internet archi-tecture supported for separation mechanism had been accomplished in the real test-bed, and the experimental data and performance analytical results both illustrate the feasibility and efficiency of such mobile Internet architecture.4. For distributed mobility management scheme and mobile Internet architecture proposed in the thesis, a route optimization mechanism is introduced supporting for control plane and data plane separation mechanism. By new defined Proxy Binding Query message and Proxy Query ACK message, Mobile Access Gateway can inquiry the location of MN within the same domain, leading to the directly communication between MNs through Mobile Access Gateway. In the Fluid Flow model, thesis compares the proposed route optimization mechanism with traditional route optimization mechanism for proxy mobile IPv6in signaling cost and packets delivery cost.