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Wideband digital cluster system based on TD-LTE (time division-long term evolution) and data transmission method thereof

A digital trunking system and data technology, applied in the field of communication, can solve problems such as difficulties, large interference of analog trunking system, and no solution given, so as to achieve the effect of improving utilization rate and reducing cost

Active Publication Date: 2013-01-02
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The development of the trunking system has gone through the stage of analog trunking system and narrowband digital trunking system. Among them, the trunking system of the two development stages has many disadvantages. For example, the analog trunking system has shortcomings such as large interference, many blind spots and limited frequency; narrowband Although the digital trunking system has improved compared with the analog trunking system in terms of communication quality and capacity, it is still relatively weak in terms of data transmission capability and multimedia service support ability, and the narrowband digital trunking system is moving towards the long-term evolution (Long Term Evolution, There are certain difficulties in the evolution process of the broadband digital trunking system (referred to as LTE)
[0003] How to use the existing LTE network to realize the trunking service, there is no effective solution in the relevant technology at present

Method used

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  • Wideband digital cluster system based on TD-LTE (time division-long term evolution) and data transmission method thereof
  • Wideband digital cluster system based on TD-LTE (time division-long term evolution) and data transmission method thereof
  • Wideband digital cluster system based on TD-LTE (time division-long term evolution) and data transmission method thereof

Examples

Experimental program
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Embodiment 1

[0028] figure 1 It is a schematic structural diagram of a TD-LTE-based broadband digital trunking system according to an embodiment of the present invention.

[0029] Such as figure 1 As shown, the TD-LTE-based broadband digital trunking system of the embodiment of the present invention mainly includes three parts: one or more trunking application servers 10 , LTE core network 20 and wireless access subsystem 30 . Among them, one or more cluster application servers 10 are used to schedule cluster services, establish an end-to-end session with the user terminal, and send data from the user terminal to the LTE core network 20; the LTE core network 20 is used to receive For the data, assign an IP multicast address to the session according to the group identifier of the target terminal group of the data, and send the IP multicast address to the wireless access subsystem 30, and then send the data to the joining station The IP multicast evolved base station (evolved Node B, refer...

Embodiment 2

[0033] figure 2 It is a schematic structural diagram of a TD-LTE-based broadband digital trunking system according to Embodiment 2 of the present invention, such as figure 2 As shown, in this embodiment, the wireless access subsystem 30 also includes: a master communication equipment (Master Communication Equipment, referred to as MCE) 302; the LTE core network 20 includes: a P-GW (Packet DataNetwork Gateway, packet data network gateway ) 200, BM-SC (Broadcast Multicast Service Center) 202, MBMS-GW 204 and MME 206.

[0034] In this embodiment, the P-GW 200 is used to receive data from the cluster application server 10, and forward the data to the BM-SC 202 when it is determined that the received data is cluster service data in multicast mode; BM - SC 202, configured to send a session start request message to MBMS-GW 204, indicating that MBMS service transmission is about to start; MBMS-GW 204, configured to create an MBMS bearer context for the session transmitting the MBMS...

Embodiment 3

[0043] image 3 It is a schematic diagram of the architecture of a TD-LTE-based broadband digital trunking system according to Embodiment 3 of the present invention, as image 3 As shown, in the embodiment of the present invention, the TD-LTE-based broadband digital trunking system mainly includes: a terminal, a broadband wireless access subsystem, a network subsystem, an IMS, an application subsystem, and an operation and maintenance subsystem.

[0044] The architecture of the TD-LTE-based broadband digital trunking system of this embodiment will be described below.

[0045] In this embodiment, the terminals include, but are not limited to: handheld terminals, vehicle-mounted stations, fixed stations, and wireless dispatching stations.

[0046] In this embodiment, the broadband wireless access subsystem is composed of multiple eNodeBs (evolved base stations), and multiple eNodeBs can be connected through the X2 interface. In addition to supporting the existing functions in t...

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Abstract

The invention provides a wideband digital cluster system based on TD-LTE (time division-long term evolution) and a data transmission method thereof. The system comprises one or more cluster application servers, an LTE core network and a wireless access sub-system, wherein the cluster application servers are used for scheduling a cluster business, scheduling and managing an end-to-end session of a user terminal, and sending the data from the user terminal to the LTE core network; the LTE core network is used for receiving the data, allocating an IP (Internet protocol) multicast address to the session according to the group identifier of a target terminal, sending the IP multicast address to the wireless access sub-system, and then sending the data to an evolved base station joining the IP multicast corresponding to the IP multicast address; and the wireless access sub-system comprises one or more evolved base stations which are used for joining the IP multicast corresponding to the IP multicast address according to the IP multicast address, receiving the data and sending the data to each target terminal in the target terminal group. Through the invention, the cluster business can be realized by expanding the existing LTE core network.

Description

technical field [0001] The present invention relates to the communication field, in particular to a broadband digital trunking system based on Time Division-Long Term Evolution (TD-LTE for short) and a data transmission method thereof. Background technique [0002] At present, trunking communication systems are widely used in government departments, public security, emergency communications, electric power, civil aviation, petrochemical and military facilities and other fields. With the development of communication technology and the continuous deepening of people's understanding of trunking systems, trunking systems are playing an increasingly important role as an efficient emergency command and dispatch system. The development of the trunking system has gone through the stage of analog trunking system and narrowband digital trunking system. Among them, the trunking system of the two development stages has many disadvantages. For example, the analog trunking system has shor...

Claims

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Application Information

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IPC IPC(8): H04W4/06H04W84/08
CPCH04W76/002H04W8/186H04W76/40
Inventor 杜高鹏马子江张现周朱永升
Owner ZTE CORP
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