Study On The Network Structure And Key Management Of Tactical Internet

Tactical Internet (TI), base on Ad Hoc technology, is an acentric, self-organized and multi-hop wireless network. TI can be rapidly deployed without any pre-existing network infrastructure or centralized administration. Moreover, it is destruction-proof. Undoubtedly, it is of great value in military communications. However, while the foreign military forces were commonly equipped with TI, our PLA has not made full use of it due to some technical difficulties. This thesis puts forward a new network structure for TI after analyzing the components and the interconnection of the Tactical Internet. Also, a distributed-centralized key management is proposed. All the simulations, especially what impact the network structure's variation exerts on the performance, were finished in OPNET. The research provides technological support for our TI construction and evaluation, guarantees TI's stability in the digital battlefield and eventually helps us win.The content of this thesis is listed below:(1) On the base of introducing the general knowledge and main technology of TI,Key explains the technology of TI's network structure and key management, unifies new Research results and army's actual. Made it clear that the first thing is to mange network structure and the key well.(2) After inspecting the foreign mature TI, suggested developing our own TI in a multilayer and multilevel way, which not only guarantees small union, even individual's communication with little network resource, but also the inter-layer and cross-level one.(3) In network secrity, according as multilayer-multilevel network structure put forward a distributed-centralized key management. The security request of TI is up to the request.(4) Established two TI nodes models and simulated them in various scopes, velocities and loads. Such experiments simulate those that influence TI's performances as the node's amount and movement speed, loads in the network and so on. Some data and diagrams including Delay, Media Access Delay, Load, ETE Delay, Throughout, Overhead and bit error rate are received.The paper explores an approach to study TI. The conclusions can be applied to platoon network or company network in PLA, and can provide simulative technological support for implementation and performanceestimate of the TI. And people may also refer to the results of this dissertation to plan and design the TI.