Details of Research Outputs

In this paper, we present the design and implementation details of an efficient and robust multimedia gateway which enables ubiquitous multimedia wireless communication. Primarily, we studied current technological trend and realized that in order to support various network technologies and to handle high call traffic conditions, a robust and efficient gateway is required for the universal adaptability and transcoding. To achieve the performance improvement of the gateway, we focus on efficiently implementing the H.245, which is the main call handling and signaling protocol. In our method, sets of H.245 messages are compiled, used and stored in a table so as to be reused for further incoming calls. After implementing this procedure, we have successfully tested our 3G-IP gateway that is robust enough for smoothly handling up to one million concurrent calls. It is also experimentally verified that our gateway provides the feature of invariant call setup time even in high traffic condition. As ubiquitous communications among the heterogeneous networks are in demanding today and our gateway will play the key role in this area. © 2008 IEEE.