The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 30, 1999
Filed:
Jul. 17, 1997
Kiyotaka Horikawa, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In a data communication system, the controller of a mobile switching center is initially responsive to a request message from a mobile user for supplying a single-bit setup message to an interworking unit via a signaling channel exclusively associated with a data channel. In response, the interworking unit activates an associated network DCE within the mobile switching center and returns a single-bit first response message to the controller. In response, the controller returns an ACK message to the mobile user to allow the data channel to be established between the mobile user and the local DCE. When the data channel is established, the interworking unit returns a single-bit second response message to the controller to allow the data channel to extend to a destination DCE and allow handshaking to proceed between the network DCE and the destination DCE via the interworking unit, using the network DCE as a local DCE of the mobile user.