Transmission method and terminal for group calling service under direct mode operation
A technology of off-net direct connection and transmission method, which is applied to the transmission method and terminal field of group call service in off-net direct connection mode, and can solve the function and group call service without providing group call service transmission and without considering off-net direct connection mode. The transmission method cannot work in the off-network pass-through mode, etc., to achieve the effect of ensuring communication
Inactive Publication Date: 2014-02-12
POTEVIO INFORMATION TECH CO LTD
View PDF4 Cites 15 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] Under normal communication conditions, the system design of group call service transmission in the trunking communication system involves network elements such as base stations and mobile network core evolution (Evolved Packet Core, EPC). Since there is no base station in the direct mode, the group call service under normal circumstances The transmission method cannot work in the direct mode, and the function of the direct mode has not been considered in the current LTE system specification, and the current agreement does not give how to realize the group call service in the direct mode Then, how to transmit the group call service in the off-network direct mode has become an urgent problem to be solved
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0029] Embodiments of the present invention provide a group call service transmission method and a terminal in the off-network direct mode, which are used for terminals to transmit service data in the off-network direct mode, thereby ensuring communication between terminals in the off-network direct mode communication.
[0030] In order to better understand the technical solution in the embodiment of the present invention, the following will introduce the reference model and channel structure design of the off-network direct mode in the embodiment of the present invention, please refer to figure 1 , is a model diagram of a terminal communication mode in a direct mode that can be referred to in the embodiment of the present invention, and may be referred to as a model diagram of a direct mode (Direct Mode, DM) terminal communication.
[0031] exist figure 1 Among them, DM terminal 1 is connected to other DM terminals through the air interface, and provides trunking services su...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The embodiment of the invention discloses a transmission method and terminal for a group calling service under direct mode operation. The transmission method and terminal are used for achieving group calling service data transmission between terminals under the direct mode operation. The transmission method for the group calling service under the direct mode operation comprises that if a calling terminal detects that a direct mode operation DM channel is in an idle state, the calling terminal continuously sends synchronous signals through the DM channel to become a master control terminal and meanwhile sends signaling; after a preset time period, the master control terminal sends group calling service data, and group calling service data transmission under the direct mode operation can be effectively achieved, so that communication between terminals under the direct mode operation is ensured.
Description
technical field [0001] The invention relates to a trunking communication system, in particular to a transmission method and a terminal for a group call service in an off-network direct mode. Background technique [0002] The trunking mobile communication system is an advanced mobile command and dispatch system, which plays a huge role in enterprises, institutions, public security, military, industrial and mining, oil fields, airports and other departments that require high command and dispatch functions. Compared with the public mobile communication system, the digital trunking communication system has the characteristics of fast call connection, high safety and reliability, and high resource utilization rate, and is especially suitable for mobile users to engage in production scheduling and command and control services. [0003] Direct Mode Operation (DMO) is an important feature in the cluster mobile communication system. The DMO technology refers to providing a terminal w...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/10
Inventor 周欣赵顾良陈永
Owner POTEVIO INFORMATION TECH CO LTD