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Method and device for processing sending and receiving in process of clock transmission

A processing method and clock technology, applied in electrical components, synchronization devices, wireless communication, etc., can solve the inconvenience of NodeB hardware revision and other problems

Active Publication Date: 2014-03-12
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] NodeB hardware revision has many inconveniences

Method used

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  • Method and device for processing sending and receiving in process of clock transmission
  • Method and device for processing sending and receiving in process of clock transmission
  • Method and device for processing sending and receiving in process of clock transmission

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Embodiment Construction

[0040] The inventor noticed during the invention that:

[0041] 1. The satellite receiver antenna is limited by the transmission distance and can only be installed in a small radius area. For example: the signal power of the Beidou antenna port is generally -127dbm, the antenna gain is 43db, the sensitivity of the Beidou receiver is -100dbm, and only 16db (=-127+43+100) attenuation is allowed on the radio frequency line. If the signal line of LMR-40 is used (22dB / 100m2.5Ghz), the radio frequency line can only extend the distance of 72m (=16÷22×100). If it exceeds 72m, it is necessary to add a line amplifier, which brings trouble to the construction.

[0042] 2. The radio frequency cable is expensive, which increases the construction cost of the project. E.g:

[0043] LMR-400 16.8dB / 100mt1.5Ghz 22dB / 100m2.5Ghz 13 yuan / m,

[0044] LMR-600 10.9dB / 100mt1.5Ghz; 14.5dB / 100m2.5Ghz 18 yuan / m.

[0045] If calculated according to the average 40m radio frequency remote cable, the LM...

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Abstract

The present invention discloses a method and a device for processing sending and receiving in the process of clock transmission, wherein the method comprises the steps that: an indoor clock unit exchanges information with an outdoor clock unit according to an IEEE (Institute of Electrical and Electronics Engineers) 1588v2 protocol; the indoor clock unit obtains a time delay of information transmitted between the indoor clock unit and the outdoor clock unit according to the time required by the information exchange; and the indoor clock unit calibrates PPS (Pulses Per Second) sent by the outdoor clock unit according to the time delay. The method and the device in the present invention have the advantages that: the implementation cost is low, and Node B (Base station) can realize the function of the indoor clock unit without hardware change.

Description

technical field [0001] The present invention relates to communication equipment, in particular to a sending and receiving processing method and equipment in the process of clock transmission. Background technique [0002] At present, time synchronization of TD-SCDMA (Time Division Synchronized Code Division Multiple Access, Time Division Synchronized Code Division Multiple Access) base station is mainly realized by satellite system timing. figure 1 It is a schematic diagram of GPS (Global Positioning System) / Beidou timing in the current TD-SCDMA system. The existing NodeB (base station) clock synchronization scheme is as follows: figure 1 As shown, the antenna receives GPS / Beidou satellite signals, transmits the RF signals to the GPS / Beidou receiver in NodeB through the RF cable, and the GPS / Beidou receiver recovers the clock and outputs PPS (Pulses Per Second, pulses per second) and TOD (Time of Date, date and time) to the phase-locked loop in the NodeB, and the phase-lock...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00
Inventor 翟宇坤张连栋李军
Owner DATANG MOBILE COMM EQUIP CO LTD