Paper:
Language: English:

Applying SIP VoIP to Context-Aware Telephony

Hsien-Chang Wang^, Gu-Jun Chen^, and Jenq-Muh Hsu^**

^*Department of Information Management, Chang Jung Christian University
396 Chang Jung Rd., Sec.1, Kway Jen, Tainan 71101, Taiwan, R.O.C.
^**Department of Computer Science and Information Engineering, Chung Cheng University
168, University Rd., Min-Hsiung Chia-Yi, Taiwan, R.O.C.

Received: January 20, 2007

Accepted: May 22, 2007

Keywords: SIP, context-aware, ubiquitously, session control, VoIP

Journal ref: Journal of Advanced Computational Intelligence and Intelligent Informatics, Vol.11, No.7 pp. 767-771, 2007

Abstract

The simple, efficient Session Initial Protocol (SIP) is widely used to integrate context-awareness computing techniques. We propose a SIP-based research framework that integrates automatic speech generation to make communication between users more convenient. Based on the proposed approach, we built and tested a SIP context server and several SIP agents hosted on PCs. If the called party is absent or busy, a context-aware message is automatically replied to the caller via synthesized natural speech. Experiments conducted by 50 college students using ADSL connected to the SIP server showed encouraging results, especially in user satisfaction in message transfer rates and service waits.

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