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Device and method for detecting transmission state of connection E1 interface

A transmission network and interface technology, which is applied in the field of mobile communication access, can solve problems such as the inability to monitor and test the transmission network at any time, affect the use of mobile networks by users, and affect the normal operation of services, so as to shorten the response time and facilitate maintenance work.

Active Publication Date: 2009-07-08
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method cannot monitor and test the bit error of the transmission network at any time, but when the network fails, the special maintenance personnel will carry the instrument to the scene of the network segment where the failure occurs, first stop the operation of the equipment, and then perform offline detection on the equipment and locate the fault
The base station needs to cover a wide area. Generally, a large city needs at least several thousand base stations. If a base station stops its business, it will directly affect the users within several square kilometers nearby to use the mobile network. Moreover, for some base stations in remote areas, once an accident occurs problem, the maintenance personnel cannot arrive at all in a short time, thus affecting the normal operation of the business

Method used

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  • Device and method for detecting transmission state of connection E1 interface
  • Device and method for detecting transmission state of connection E1 interface
  • Device and method for detecting transmission state of connection E1 interface

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0037] The first embodiment: using the base station and the RNC's own equipment to detect the health status of the offline transmission network.

[0038] The core content of this embodiment is: the base station equipment sends out the pseudo-random code of the analog service signal through the E1 interface. After reaching the RNC through the transmission network, the RNC side will transmit and receive the self-loop, that is, send the received pseudo-random code signal as it is, and the base station The interface chip receives the pseudo-random code signal through the E1 interface, and then compares the signal received by the E1 interface with the signal sent by the interface chip to calculate the number of code errors per unit time, that is, the transmission The bit error occurrence rate of the network, and the unit time is usually seconds.

[0039] In order to realize the above technical solution, it is necessary to add a detection device to the base station equipment. The st...

no. 2 example

[0063] The second embodiment: using the base station and the RNC's own equipment to detect the health status of the online transmission network through the FAS signal of the frame header TS0.

[0064] The core content of this embodiment is to detect that the E1 interface receives the inherent frame header signal FAS in the E1 signal. Since the encoding content of the FAS signal is fixed as "0011011" without error, if the detected FAS signal is not inherent In the form, it is considered that in the process of transmitting the signal by the transmission network, an error occurs in the FAS signal, and the error rate of the FAS signal can be obtained through a certain statistical algorithm. The error rate of the FAS signal can also reflect the health status of the transmission network, or the error rate of the FAS signal can be converted into a bit error rate through a formula.

[0065] In order to realize the above technical solution, it is necessary to add a detection device in ...

no. 3 example

[0085] Embodiment 3: Using the base station and the RNC's own equipment, the health status of the online transmission network is detected through the CRC-4 check result and the FAS signal.

[0086] According to the previous introduction to the multiframe E1 signal, the multiframe E1 signal contains the CRC-4 check digit. If the check digit is wrong, it means that there is a code error in the transmission of the check digit, so the CRC-4 checksum The bit error rate can also reflect the health of the transmission network. The core content of this embodiment is to simultaneously detect the FAS signal and the CRC-4 check bit.

[0087] The device of this embodiment is as Figure 8 As shown, on the basis of the device in the second embodiment, a CRC-4 detection unit 806 is newly added in the detection device 804, which is used to receive the multiframe E1 signal from the E1 interface of the base station equipment 801, and complete the CRC-4 A verification process, which is based o...

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Abstract

The invention discloses a device for checking the status of a transmission network connected to an E1 interface, which is located in the equipment where the E1 interface is located. The device includes an error code collection unit for collecting the signal of a code error occurring on the E1 interface, and analyzing the collected code error The signal is counted, and the associated bit error acquisition unit further includes a frame alignment signal FAS detection unit and / or a cyclic redundancy check code CRC-4 detection unit; an error processing unit is used to read the counting result of the error acquisition unit, And the result is cleared after reading; the parameter used to reflect the state of the transmission network is calculated according to the read counting result. The invention also discloses a method for checking the state of the transmission network connected to the E1 interface through the above device. By applying the solution of the invention, the status of the transmission network can be obtained conveniently, and the normal operation of the system can be guaranteed without adding external equipment.

Description

technical field [0001] The invention relates to the technical field of mobile communication access, in particular to a device and method for checking the state of a transmission network connected to an E1 interface. Background technique [0002] In the wideband code division multiple access (WCDMA) system, the base station (Node B) and the radio network controller (RNC) constitute the access network. The Iub interface between the base station and the RNC is often connected by an E1 interface. E1 is the rate standard for the primary group of the pulse code modulation multiplexing system digital system in Europe. It includes 32 channels of 64 kilobits per second (kbps), also known as time slots (Time Slot, TS), and the total bandwidth rate It is 2048kbps. [0003] The network diagram of WCDMA system is as follows: figure 1 As shown, it consists of three parts: an access network and a core network composed of terminals, base stations and RNC. Among them, the base station an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/14H04L12/24H04L69/40
Inventor 熊绍成
Owner HUAWEI TECH CO LTD