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:
Apr. 20, 2010
Filed:
Dec. 29, 2004
Yuhong Xue, Shenzhen, CN;
Yingnan Liu, Shenzhen, CN;
Jinlong Liu, Shenzhen, CN;
ZTE Corporation, Shenzhen, CN;
Abstract
The present invention discloses a method of fast call setup in digital trunking communication system, including: the terminal user initiating a PTT call; the base station receiving said PTT call request, assigning channel resource for the call, establishing forward service channel according to the distribution of channel, transmitting an empty frame on the forward service channel and at the same time transmitting an extended channel assignment message to specify the service channel assigned for the terminal; after receiving the extended channel assignment message, the terminal user opening the receiver to track and acquire the forward service channel, and at the same time transmitting one or more prefix-frame on the reverse service channel or reverse pilot channel; the base station or the terminal performing the operation of acquisition of service channel, if the acquisition succeeds, the call setup is successful, if the acquisition fails, the call setup is failed and enters release flow. The method of the present invention adopts a mode of overlapping of signaling handshake and channel acquisition, so as to advance the signaling handshake, reduce call accessing time, and realize fast call setup.