Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
2005-08-30
2005-08-30
Duong, Frank (Department: 2666)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
C370S410000
Reexamination Certificate
active
06937604
ABSTRACT:
A device for data communications between a Wireless Application Protocol (WAP) terminal and a WAP server, and a data communication method thereof. The data communications device includes: a plurality of WAP terminals each having a protocol stack in which a Circuit Switch Data service (CSD) protocol layer is laid under a Wireless Transaction Protocol (WTP) layer and a Wireless Datagram Protocol (WDP) layer, for generating WAP data which is service request data; a plurality of WAP servers each having a protocol stack in which a Transmission Control Protocol (TCP) layer and an Internet Protocol (IP) layer are laid under a WTP layer and a WDP layer, for providing the WAP terminals with WAP server data according to the WAP data; and an interworking function (IWF) unit having a CSD protocol layer connected to the CSD protocol layers of each WAP terminal, and a TCP layer and an IP layer which are connected to the TCP and IP layers of each WAP server, for mapping the WAP terminals to the corresponding WAP servers, wherein each WAP terminal communicates with the IWF unit though a single Internet Protocol/Peer-to-Peer Protocol (IP/PPP) layer included in its own CSD protocol layer, and the IWF unit communicates through the Internet with each WAP server. Because there is no redundancy of IP/PPP protocol layers in the WAP terminal, overhead is considerably reduced. Also, the IWF unit is directly connected through the Internet to the WAP server, not through the PSTN and the ISP, so that connection time and costs can be reduced.
REFERENCES:
patent: 6044062 (2000-03-01), Brownrigg et al.
patent: 6088340 (2000-07-01), Buchholz et al.
WAP Forum, Wireless Application Protocol Architecture Specification, pp. 1-20, Apr. 30, 1998.
WAP Forum, Wireless Application Protocol Wireless Datagram Protocol Specification, pp. 1-52, Apr. 30, 1998.
Contribution to WAP Forum WPG on WAP over CDMA IS-707 CSD; Jul. 20, 1998; pp. 1-6 and pp. 1-2.
Kim Yong-suk
Lee Sang-seo
Duong Frank
Samsung Electronics Co,. Ltd.
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