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A data mapping method, device and device

A technology of data mapping and quantity, applied in the field of communication, which can solve the problems of inconvenience, small configuration, and inability to transmit narrowband IQ data.

Active Publication Date: 2020-01-21
HYTERA COMM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, the cluster private network is evolving from narrowband to broadband. Traditional narrowband systems (PDT, DMR, Tetra, etc.) still use an integrated base station architecture, that is, a BBU and RRU integrated architecture. The structure of separating BBU and RRU is adopted, so it involves the data transmission of narrowband data in CPRI
However, the CPRI interface protocol of the public network cannot be directly used in the cluster private network, because when calculating the number K of basic frames corresponding to S IQ sampling points, the value obtained by narrowband calculation is much higher than that obtained by wideband calculation value
In the public network system, the configuration of the mapping parameter K is usually small (for example, within 50), so that the existing CPRI cannot transmit narrowband IQ data, and to adapt the existing CPRI to narrowband IQ data transmission, You need to make major changes in the configuration, which is very inconvenient

Method used

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  • A data mapping method, device and device
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  • A data mapping method, device and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] see image 3 , which is a flowchart of Embodiment 1 of a data mapping method provided by the present invention.

[0068] The data mapping method provided in this embodiment includes the following steps:

[0069] Step S101: Obtain the narrowband IQ sampling rate f s ', broadband frequency f sf and the number of narrowband antenna carriers N' A .

[0070] The frequency of the broadband is the reciprocal of the time slice, and the time slice refers to the time period specified in the broadband standard protocol, such as subframe, time slot, wireless frame, OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) symbols etc.

[0071] Step S102: using the narrowband IQ sampling rate f s ' and the broadband frequency f sf Get the number S' of narrowband IQ sampling points corresponding to each narrowband antenna carrier, and N' A The number K' of wideband time slices to which the narrowband IQ sampling points of antenna carriers c...

Embodiment 2

[0086] This embodiment introduces the data mapping method provided by the present invention by combining actual application scenarios. In this embodiment, the narrowband is the PDT (Police Digital Trunking or Public Digital Trunking, police digital trunking system or public digital trunking) standard, and the broadband is the LTE (Long Term Evolution, Long Term Evolution) standard. In this embodiment It is not only necessary to realize the transmission of the IQ data of the PDT standard, but also to realize the compatible transmission of the IQ data of the PDT standard and the IQ data of the LTE standard.

[0087] In order to better understand the data mapping method provided by this embodiment, the frame format and IQ data format of the PDT trunking system are introduced first. see Figure 4 , the figure shows the frame structure of the PDT system, in the frame structure, 60ms is divided into 2 time slots, and the length of each time slot is 30ms. A time slot consists of th...

Embodiment 3

[0118] see Figure 8 , which is a structural block diagram of a data mapping device provided in this embodiment.

[0119] The data mapping device provided in this embodiment includes:

[0120] A parameter acquisition unit 101, a parameter calculation unit 102, a narrowband mapping unit 103 and a broadband mapping unit 104;

[0121] The parameter acquisition unit 101 is used to acquire the narrowband IQ sampling rate f s ', broadband frequency f sf and the number of narrowband antenna carriers N' A , the frequency of the broadband is the reciprocal of the time slice, and the time slice refers to the time period specified in the broadband standard agreement;

[0122] The parameter calculation unit 102 is configured to use the narrowband IQ sampling rate f s ' and the broadband frequency f sf Get the number S' of narrowband IQ sampling points corresponding to each narrowband antenna carrier, and N' A The number K' of wideband time slices to which the narrowband IQ sampling p...

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Abstract

The embodiment of the invention discloses a data mapping method, apparatus and device. The data mapping method in which narrowband IQ data can be transmitted without changing the CPRI is realized. The method comprises the following steps: obtaining a narrowband IQ sampling rate fs', broadband frequency fsf and the narrowband antenna carrier number N'A, wherein the broadband frequency is a reciprocal of a time slice, and the time slice refers to a time period regulated in a broadband system protocol; obtaining the number S' of narrowband IQ sampling points corresponding to each narrowband antenna carrier and the number K' of time slices of the broadband to which the narrowband IQ sampling points of the N'A antenna carriers can be mapped by using the narrowband IQ sampling rate fs' and the broadband frequency fsf; mapping the narrowband IQ sampling points of the N'A antenna carriers of the narrowband into the K' time slices of the broadband; and with the mapped K' time slices as unit, mapping the narrowband IQ sampling points into a basic frame of a universal public wireless interface so as to accomplish the mapping of the narrowband IQ sampling points in the universal public wireless interface.

Description

technical field [0001] The present invention relates to the communication field, in particular to a data mapping method, device and equipment. Background technique [0002] This section is intended to provide a background or context for implementations of the invention that are recited in the claims. The descriptions herein are not admitted to be prior art by inclusion in this section. [0003] With the continuous advancement of mobile communication technology, the network architecture of wireless communication is also constantly evolving. The base station system mainly characterized by the separation of Base Band Unit (BBU) and Remote Radio Unit (RRU) has been It has become the main form of public network base stations (especially LTE base stations). In a distributed radio frequency system, the common public radio interface (Common Public Radio Interface, CPRI) is the radio equipment control center (Radio Equipment Control, REC) where the baseband unit is located, and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00
CPCH04L5/0008H04L5/001
Inventor 焦富强鲁志兵王志国杨盛波杨洁
Owner HYTERA COMM CORP