The Research about Voice Transmission between CDMA Network and PSTN Network Using CDMA Circuit Data Service


The KIPS Transactions:PartC, Vol. 15, No. 5, pp. 367-374, Oct. 2008
10.3745/KIPSTC.2008.15.5.367,   PDF Download:

Abstract

To realize the voice privacy between CDMA mobile phone and PSTN terminal, the voice frames shall be transmitted transparently between the heterogeneous networks. For satisfying this requirement, we propose the method which transmits voice frames using the CDMA circuit data channel in real time. In this paper we analyze the causes of voice delay which occurs during voice transmission using circuit data channel. And in order to overcome this kind of delay, the technique controlling the TCP control flag and the variable audio block construction algorithm according to the vocoder output rate are proposed. As a result of experimenting by applying the proposed method, we confirmed that the transit delay was improved with about average 70%.


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Cite this article
[IEEE Style]
Y. S. Park, J. H. Ahn, J. C. Ryou, "The Research about Voice Transmission between CDMA Network and PSTN Network Using CDMA Circuit Data Service," The KIPS Transactions:PartC, vol. 15, no. 5, pp. 367-374, 2008. DOI: 10.3745/KIPSTC.2008.15.5.367.

[ACM Style]
Yong Seok Park, Jae Hwan Ahn, and Jae Cheol Ryou. 2008. The Research about Voice Transmission between CDMA Network and PSTN Network Using CDMA Circuit Data Service. The KIPS Transactions:PartC, 15, 5, (2008), 367-374. DOI: 10.3745/KIPSTC.2008.15.5.367.