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A method and system for testing RRU uplink delay

A time delay and link technology, applied in the field of communication, can solve the problems of large test errors, etc., and achieve the effect of improving efficiency and ensuring accuracy

Inactive Publication Date: 2017-09-29
NANJING ZHONGXING XIN SOFTWARE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The technical problem solved by the present invention is to provide a method for testing RRU uplink time delay, to solve the problem of large test error in the prior art; the present invention also provides a device for testing RRU uplink time delay

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  • A method and system for testing RRU uplink delay
  • A method and system for testing RRU uplink delay
  • A method and system for testing RRU uplink delay

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Embodiment Construction

[0040] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0041] Such as image 3 As shown, it is a diagram of a test device applied in the embodiment of the present invention. The test device is a formal test environment of BBU+RRU. The signal source is connected to the RF input port, and the TRIG (trigger) line is drawn from the RRU to the signal source.

[0042] This test method uses the signal source to send a 1ms high pulse signal modulated to the radio frequency band of the antenna port, and the cycle is 10ms to send once, such as Figure 4 Shown is a single subframe length square wave data source sent ...

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Abstract

The present invention relates to a method and device for testing uplink delay of a Radio Remote Unit (RRU), which comprises that after the RRU receiving test signals, data are sampled by an analog to digital converter (ADC) interface and then transferred to a digital down conversion (DDC) filter, the coefficients of the DDC filter are reconfigured, and then the required delay data is output by filtering; after the data is transferred to a Common Public Radio Interface (CPRI) module, the data are detected by a peak detection module, and the uplink delay is calculated after the detection. With the present invention, the accuracy of the delay reported to the Base Band Unit (BBU) is ensured, and the efficiency is greatly improved by the automating test at the same time.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and system for testing the uplink time delay of an RRU (Remote Radio Unit). Background technique [0002] In the base station-to-multi-user equipment UE system, the frame frequency of the base station’s transmitting air interface and the frame frequency of the receiving air interface must be synchronized for sending and receiving. Therefore, the base station is required to be able to accurately obtain the reporting delay time from the RRU air interface to the optical interface, and adjust the uplink wireless frame decoding position. Such as figure 1 Shown is the uplink delay link diagram of the base station, including the base station processing unit BBU (also called radio equipment controller REC), RRU (also called Wireless equipment RE) and RA (wireless transceiver equipment), the uplink delay includes fiber delay T34 and Ta3 (antenna port to RRU optical port delay). [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/06H04W88/08
CPCH04W24/06
Inventor 杨培营王崇剑
Owner NANJING ZHONGXING XIN SOFTWARE CO LTD
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