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.
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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