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Internet protocol (IP) service converged communication system and communication method based on digital terrestrial multimedia broadcasting (DTMB) and "Satcom on the move"

A technology of service integration and communication system, applied in the field of IP service integration communication system based on DTMB and mobile communication, can solve the problem that the transmission bandwidth of a single DTMB channel is fixed, the idle DTMB channel is not fully utilized, and cannot support high-definition Video real-time transmission and other issues to achieve the effect of supporting real-time transmission

Active Publication Date: 2021-07-09
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) The stability, coverage, bandwidth and cost of the existing emergency communication system cannot meet the requirements;
[0007] (2) The DTMB link cannot allocate and manage its own channel, and the idle DTMB channel cannot be fully utilized;
[0008] (3) The transmittable bandwidth of a single DTMB channel is fixed, which cannot support real-time transmission of high-definition video
[0010] (1) The difficulty in making the stability, coverage, bandwidth and cost of the emergency communication system meet the requirements is that a single network system cannot meet all the above requirements at the same time. Combined to build a converged communication system that uniformly bears and transmits IP services;

Method used

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  • Internet protocol (IP) service converged communication system and communication method based on digital terrestrial multimedia broadcasting (DTMB) and "Satcom on the move"
  • Internet protocol (IP) service converged communication system and communication method based on digital terrestrial multimedia broadcasting (DTMB) and "Satcom on the move"

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Experimental program
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Effect test

Embodiment 1

[0088] Previously, the multi-mode terminal and the distribution and aggregation server used multiple links for data transmission.

[0089] The protocol stack of the distribution aggregation server and the multi-mode terminal is shown in the figure.

[0090] IP over DTMB (DTMB links carry IP services) uses the DTMB broadcast channel to broadcast downlink multi-user IP packets to user terminal equipment, and the terminal equipment parses and filters IP packets. The overall design architecture is shown in the figure.

[0091] The DTMB-based IP transmission system extends the message format in the broadcast service frame transmitted by DTMB to support downlink IP packets bearing multiple users to achieve better coverage. The DTMB physical channel is transmitted in units of transport stream packets (TS packets), and the transport stream consists of one or more programs. Transport Stream packets carry data for one and only one elementary stream. In order to support the carrying o...

Embodiment 2

[0109] 4.1 The integrated emergency communication system of DTMB and "Telecom in Motion"

[0110] IP service links that can be used to build a converged emergency communication system include DTMB links (based on IP over DTMB technology to carry IP services), and operators' 4G / 5G public network links, as well as "communication in motion" satellite communication links Road and so on. When constructing a fusion emergency communication system, it is necessary to design a fusion emergency communication system with stability, wide coverage, deep coverage, large bandwidth and reasonable cost. Based on this goal, the following is an analysis of these link characteristics:

[0111] ① The coverage of the operator's 4G / 5G public network link is not as good as that of the DTMB link and the "Mobile Communication" satellite communication link, and the channel congestion is relatively high, so it is not the first choice for building a converged emergency communication system;

[0112] ②Th...

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Abstract

The invention belongs to the technical field of communication, and discloses an IP service converged communication system and communication method based on DTMB and "Satcom on the move"; the IP service converged communication system based on DTMB and "Satcom on the move" comprises the following steps: a DTMB link transmits a downlink large-bandwidth IP service by using a plurality of DTMB channels; and the communication-in-motion link sends an IP signaling of the IP service request, and carries out dynamic distribution of television services and IP unicast and multicast services on the DTMB channel. According to the invention, the DTMB link can be used for making up the low bandwidth and high cost of the "Satcom on the move" and is responsible for transmission of downlink large-bandwidth IP services, and meanwhile, the "Satcom on the move"" is used as an uplink of the one-way DTMB link, so that a stable, wide-coverage, deep-coverage, large-bandwidth and appropriate-cost two-way IP service fusion emergency communication system is realized.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a communication system and a communication method for integrating IP services based on DTMB and communication in motion. Background technique [0002] At present, the single-link emergency communication system is not stable and reliable enough. Once the link fails, the emergency communication system will be directly in a paralyzed state. Therefore, it is necessary to integrate a variety of different transmission links into the network. Through the LLC overIP tunnel technology, it is possible to realize the converged networking of various IP service transmission links, and then through the adaptive traffic scheduling mechanism, it is possible to switch the available links for emergency communication when some links fail. [0003] IP service links that can be used to build a converged emergency communication system include "Mobile Communication", DTMB and 4G / 5G pu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/20H04B7/185H04W4/90
CPCH04N7/20H04B7/18578H04W4/90
Inventor 吴伟民喻洪涛谢金浩
Owner HUAZHONG UNIV OF SCI & TECH
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