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Device of implementing accuracy timing between base band and radio frequency in wireless communication system

A wireless communication and precise timing technology, applied in communication between multiple stations, transmission systems, synchronization devices, etc., can solve problems such as inability to directly obtain long-term time scales, bandwidth waste, etc.

Inactive Publication Date: 2007-02-07
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After finding the frame boundary, the framing can be completed, but the long-term time scale cannot be obtained directly
Therefore, there is a need for a transmission mechanism of time stamp information, such as adding a time stamp segment in the frame structure, but this brings a large waste of bandwidth

Method used

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  • Device of implementing accuracy timing between base band and radio frequency in wireless communication system
  • Device of implementing accuracy timing between base band and radio frequency in wireless communication system
  • Device of implementing accuracy timing between base band and radio frequency in wireless communication system

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Experimental program
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Embodiment Construction

[0032] The invention mainly describes how frame generation and frame extraction circuits transmit and obtain frame boundaries, and how time stamp insertion and extraction circuits transmit and obtain time stamps.

[0033] Because in the mobile communication system, the front and back signals from the baseband to the radio frequency are fixed-rate data after baseband modulation. Therefore, the frame length is specified as a fixed value. For each frame, set a frame header flag as a special overhead field in the frame structure.

[0034] like figure 2As shown, it is a schematic structural diagram of a preferred embodiment of the device for realizing precise timing between the baseband and radio frequency of the wireless communication system of the present invention, the frame header insertion circuit 21 and the data insertion circuit 22 located at the baseband-remote radio frequency interface sending side , implicit time stamp insertion circuit 24, multiplexing transmission ci...

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PUM

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Abstract

The device includes circuits located at transmitting side of interface between base band and remote radio frequency: frame head insertion circuit, data insertion circuit, hidden timing mark insertion circuit as well as circuits located at receiving side: frame head matching circuit, frame head locking circuit, and data recovery circuit. Hidden timing mark insertion circuit inserts timing marks into frame data generated after processed by the frame head insertion circuit and data insertion circuit so as to obtain frame structure with hidden timing marks. At receiving side, frame structure with hidden timing marks is sent to frame head matching circuit and data recovery circuit. The frame head matching circuit finds out possible frame head sign, and frame head locking circuit locks real frame head, and data recovery circuit recovers data. Receiving output from frame head matching circuit, timing mark locking circuit locks output timing mark.

Description

technical field [0001] The invention relates to a wireless communication system, in particular to a device capable of realizing precise timing between the baseband and radio frequency of the wireless communication system. Background technique [0002] Certain wireless communication standards require high-precision timing, and the cost of precise timing sources is relatively high. To reduce costs, generally only one precise timing system is configured in the baseband for a base station system. For the RF part, the clock needs to be transferred from the baseband to the RF. [0003] For the base station where the baseband and radio frequency parts are installed at the same site, the clock can be transmitted through a dedicated clock line. However, for base station systems where baseband and radio frequency are separated, it is difficult, costly, and unreliable to set up a dedicated clock line. Therefore, it is generally multiplexed into signaling / service for transmission. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/30H04L7/02H04L12/56H04L29/10H04B7/26
Inventor 向际鹰熊乐进李江肖俊民
Owner ZTE CORP
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