A kind of transmission method and device of cpri frame on ethernet

Abstract

The invention provides a transmission method and a transmission device of a CPRI frame in the Ethernet. The method comprises steps that, free words of various control words of CPRI frames are positioned; redundant Ethernet information is inserted into the free words of the control words of the CPRI frames; length of any two adjacent ones of the redundant Ethernet information inserted into the free words of the control words of the CPRI frame is not greater than length limit of the Ethernet for a data packet; the CPRI frames with the inserted redundant Ethernet information are transmitted in the Ethernet. According to the transmission method of the CPRI frames on the Ethernet, the redundant Ethernet information is inserted into the free words of the control words of the CPRI frames, so the CPRI frames have small changes, and computational complexity of corresponding sending ends and receiving end is small.

Description

technical field [0001] The invention relates to the field of data transmission, in particular to a method and device for transmitting CPRI frames on the Ethernet. Background technique [0002] Common Public Radio Interface (CPRI: Common Public Radio Interface) is initiated by Ericsson, Huawei, NEC, Nortel Networks and Siemens, and is dedicated to the internal wireless equipment control center (referred to as REC) and wireless equipment (referred to as RE) of wireless base stations. Protocol between major interface specifications. The CPRI protocol regulates the public interface between the baseband processing unit (DU for short) and the radio frequency unit (RU for short), making base station products more flexible and compatible. The latest version V6.1 of the CPRI protocol defines a variety of line rates (such as figure 1 Shown), current base station products tend to use higher line rates more and more. [0003] The traditional baseband processing unit and the radio fre...

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Problems solved by technology

[0008] As can be seen from the aforementioned background technology, in terms of transmitting CPRI frames on Ethernet, the main technical problems at present are: 1. Due to the inconsistency of CPRI and Ethernet clocks, the design of the clock system (the clock system of the single board needs to output 153.6M and 156.25M at the same time) M clock; it is difficult to synchronize the clock of the whole system, recovering 156.25M from the RU device from the HUB, and need to lock out 153.6M) complex problems; 2. When changing the CPRI frame to adapt to Ethernet transmission, the problem of large changes

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