| Summary: | 碩士 === 國立中央大學 === 資訊工程學系 === 102 === With increasing demand of network function, the techonology of network function virtualization (NFV) appeared for traditional telecom network. Now, domestic and overseas telecom operators think how to make telecom network more open and common by using information technology, in order to cope the escalating competition. Traditional telecom network uses exclusive switches. It can ensure the stability, but it
make the system closed and inflexible. NFV can join the advantage of IT into traditional telecom network. Currently, many telecom operators are searching for what is NFV suited for use, and some use cases are implemented. Network service chain (NSC) is used for increased flexibility and decreased costs, and it is an idea for future telecom network. In fact, NSC is not a new idea. Building a service chain to support a new application will take a great deal of time and effort, because different telecom operators use their own systems and command syntaxs. So using the switch from different telecom operators may make some errors. After SDN and NFV technologies appeared, NSC is gradually emphasized. These two techonologies can make NSC upgrade much simpler.
The experimental results show that the execution time of proposed ABCNSC mechanism is 2169.04% faster than brute-force. Another experiment shows the time a packet pass through NSC by using ABCNSC is 27.84% more than by using brute-force. Even though the result is worse the optimal solution obtained by brute-force, it is closed to the optimal solution.
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