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Medium-rate data transmission method for multi-channel combination of DMR digital cluster system

A data transmission method and technology of a digital trunking system, applied in the field of communication, to achieve the effect of solving medium-speed data transmission and realizing simple and convenient effects

Active Publication Date: 2011-02-09
HARBIN HYTERA TECH CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen from the comparison that CP4FSK has the best anti-noise performance, and although the modulation rate of TETRA is higher, it has higher requirements on the noise environment of the system, and it can only be used in application scenarios with better channel conditions. Play a role

Method used

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  • Medium-rate data transmission method for multi-channel combination of DMR digital cluster system
  • Medium-rate data transmission method for multi-channel combination of DMR digital cluster system
  • Medium-rate data transmission method for multi-channel combination of DMR digital cluster system

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Embodiment 1

[0028] Example 1: Combining Figure 7-Figure 9 , the DMR digital trunking system multi-channel joint medium rate data transmission method of the present invention is divided into two parts according to the different business processes of medium rate transmission:

[0029] 1) Multi-channel joint establishment method in control channel

[0030] The flow of the control channel established by the medium-rate data transmission service is as follows: Figure 7 shown.

[0031] First, the terminal MS (A) initiates a random access PDU for medium-rate data transmission on the control channel. TSC counts the idle situation of the current service channel, sorts and combines multiple idle channels according to the channel utilization strategy defined by the system, and sends them to the sender and receiver of data transmission through UDT, and designates the frequency point of the first logical channel in the channel sorting as the data transmission channel. The CACH receiving frequency...

Embodiment 2

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PUM

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Abstract

The invention provides a medium-rate data transmission method for multi-channel combination of a DMR digital cluster system for transmitting data in multi-channel combination and providing the code rate of 148.8Kbit / s under the limiting condition. The method comprises a multi-channel combination establishing method in a control channel and a multi-channel number changing method in a service channel. The invention provides a method for solving the problem of medium-rate data transmission under the DMR digital cluster system, which is easy and convenient to implement and has great actual use value. The method has the advantages of providing the code rate of 148.8Kbit / s under the limiting condition, not changing system hardware, and well solving the problem of the medium-rate data transmission.

Description

(1) Technical field [0001] The invention relates to communication technology, in particular to a multi-channel joint medium-speed data transmission method of a DMR digital trunking system. (2) Background technology [0002] When analyzing the requirements of the digital trunking system, we found that most of the services in the future will focus on medium-rate data transmission. According to this requirement, the Tetra system proposed a new broadband modulation method in the standard, and the data rate has been greatly improved. However, it is not compatible with Tetra's common PSK narrowband modulation. In fact, a system has multiple modulation implementation methods, which increases the difficulty of software and hardware design and increases product costs. The DMR standard is a digital trunking standard newly introduced by ETSI (European Telecommunications Standards Institute), which is also a narrowband communication. In the TETRA system, the modulation methods are divid...

Claims

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Application Information

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IPC IPC(8): H04W74/08H04W84/08H04B7/26
Inventor 孙鹏飞马超王可王鑫
Owner HARBIN HYTERA TECH CORP
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