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Method for sending, receiving time clock and apparatus for transferring time clock

A technology for sending clocks and clocks, which is applied to the device for transmitting clocks, the field of sending and receiving clocks between boards of multi-mode base stations, and can solve the problems of increasing backplane wiring and being unfavorable for system expansion, etc.

Active Publication Date: 2009-07-08
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method not only increases the backplane wiring, but also brings more workload to the PCB design, and is not conducive to system expansion.

Method used

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  • Method for sending, receiving time clock and apparatus for transferring time clock
  • Method for sending, receiving time clock and apparatus for transferring time clock
  • Method for sending, receiving time clock and apparatus for transferring time clock

Examples

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Embodiment Construction

[0038] The present invention provides a method for sending and receiving clocks and a device for transferring clocks. Multiple clocks are encoded and framed at the sending end according to the method of the present invention, so that multiple clocks can be transmitted on a pair of interconnection lines. According to the corresponding decoding rules, the board can accurately recover the clock it needs.

[0039] In a multi-mode base station, the clock board outputs a high-stability reference frequency to the user board by locking the reference input clock, hereinafter referred to as the first clock; at the same time, it needs to provide a high-accuracy clock reference to the user board, hereinafter referred to as the second clock clock. figure 1 The connection relationship between the multi-mode base station clock board (that is, the transmitting end in the figure) and each user board (that is, the receiving end in the figure) is described in , and the clock board connects the f...

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PUM

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Abstract

The invention discloses a clock transmitting method, a clock receiving method and a clock transfer device. The clock transmitting method comprises the following steps: a transmitting terminal selects a first clock frequency and second clock codes of various standards, and transmits the first clock frequency and a coded second clock to each receiving terminal via a pair of interconnected lines. The clock receiving method comprises the following steps: each receiving terminal receives the first clock frequency from a first clock transfer line, counts locally by use of the first clock, receives the coded second clock from a second clock transfer line, and resolves to obtain a second clock. The technical schemes of the invention can be adopted to transfer various clock signals on one pair of interconnected lines. The single board of each receiving terminal can accurately restore the clock required for the receiving terminal according to the relevant decoding rule.

Description

technical field [0001] The invention relates to the communication field, in particular to a method for sending and receiving clocks between boards in a multi-mode base station and a device for transferring clocks. Background technique [0002] The clock board in the base station is used to extract and recover the clock from the reference clock, and then generate a new clock according to the system requirements and distribute it to other boards. The clock to be transmitted generally includes two clock signals, the first clock signal is used to transmit a certain clock frequency, and the second clock signal is used to transmit a timing signal. Under the traditional base station architecture, a base station only needs to carry services of one standard. For example, a CDMA base station is only used in a CDMA system, so the clock requirement is also single. The clock board only needs to distribute a single clock frequency according to the system requirements. and timing signals....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L7/033H04L1/00
CPCH04L7/0008H04W56/0015H04L7/033
Inventor 傅小明
Owner ZTE CORP