Transmission delay measurement method of remote RF unit

A technology of remote radio frequency unit and transmission delay, which is applied in the direction of transmission control/equalization, communication between multiple stations, etc. It can solve the problem of low real-time requirements for delay measurement, different transmission delays, and reporting process Complicated problems, to achieve the effect of reducing workload, simple measurement process, and less reported information

Inactive Publication Date: 2008-01-09
ZTE CORP
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Problems solved by technology

[0003] When networking with this architecture, it is inevitable to use multiple REs to connect to each other according to a certain topology, so there is a problem: for each RE, the downlink transmission data sent from the REC and sent to the REC The transmission delay of uplink received data varies from
[0005] The feature of this method is that real-time measurement can be performed, but the RE is required to include a delay measurement module, and the real-time requirements for delay measurement are not high; in addition, when cascaded RE delay measurement is performed, errors will accumulate, and the reporting process is relatively complex. complex

Method used

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  • Transmission delay measurement method of remote RF unit

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Embodiment Construction

[0027] In the method for measuring the transmission delay of the remote radio frequency unit in the present invention, in the transmission delay measurement of a single-stage RE, the specific operation steps of this embodiment are as follows:

[0028] Step 110, normally establish a signaling channel between the REC and the RE under test.

[0029] Step 120, the REC controls the RE under test to perform data channel loopback through the signaling channel, and the RE under test loops back the corresponding data channel after receiving the control signaling; the loopback operation is to connect the receiving end (as shown in Figure 1 and Figure 2 The data received by the R2 terminal) is directly sent to the transmitting terminal of this interface (such as the R3 terminal in Figure 1 and Figure 2) and sent out without any processing on the data. Loopback cannot affect the normal work of other REs.

[0030] Step 130, the REC starts the measurement, starts to transmit specific sign ...

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Abstract

The invention is concerned with a kind of transmission time-delay teat method of farther end radio frequency unit. Set up signal and order channels between wireless equipment controller and the wireless equipment for testing, the wireless equipment controller controls the wireless equipment for testing to set the data of downlink data channel to uplink data channel. The wireless equipment controller sends data with special mark form sending end and test the back data with special mark on the accepted end and counts the time difference among the data with special mark. Count average value of the tested time difference as test result and count transmission time-delay of uplink and downlink data. This method reduces RE workload without error adding problem and has high teat precision.

Description

technical field [0001] The invention relates to a remote radio frequency unit of a wireless communication system, in particular to a delay measurement method of the remote radio frequency unit. Background technique [0002] In recent years, the development of communication system architecture has gradually formed such a trend: the radio frequency unit and the baseband processing unit are separated, and the two are connected through long-distance transmission means (such as optical fiber), and then the radio frequency unit is placed in various places where needed . This architecture improves the flexibility of networking on the one hand, and reduces the maintenance cost of the network on the other hand. Therefore, this architecture is more and more recognized by users, and there are more and more application occasions. In 2003, this architecture was proposed as part of the CPRI (Common Public Radio Interface) interface standard, and the radio frequency unit was defined as a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/005H04B7/26
Inventor 赵亚锋莫毅群范丽珍
Owner ZTE CORP
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