Method and device for transmitting message at optical interface

Abstract

The invention discloses a method and a device for transmitting a message at an optical interface. By the method and the device, the transmission bandwidth of an Ir interface is saved, and the processing load of remote radio units (RRUs) is reduced. The method comprises the following steps that: a base band unit (BBU) codes a BBU side optical interface number and RRU identities (IDs) in RRU medium access control (MAC) addresses, so that the BBU can conveniently determine that the Ether message is sent to a certain optical fiber, a plurality of RRUs which are connected in series at the optical interface of the BBU can be further distinguished, and the BBU can accurately address the RRUs; therefore, the Ether message can be accurately sent without being broadcast to all optical interfaces, and the transmission bandwidth of the Ir interface is effectively saved, namely the management channel bandwidth of the RRUs is improved; and correspondingly, the RRUs can acquire the Ether message needed to be processed without processing a large number of broadcast messages, so that the processing load of the RRUs is effectively reduced.

Description

technical field [0001] The invention relates to the communication field, in particular to an optical port message transmission method and device. Background technique [0002] In a communication system, network management data is usually transmitted on an IR interface between a BBU (Base Band Unit, baseband unit) and an RRU (Remote Radio Unit, remote radio unit). refer to figure 1 As shown, the Ir interface between BBU and RRU is connected by optical fiber. Usually, one BBU can connect 6 optical interfaces to connect to RRU. Further, refer to figure 2 As shown, according to the standard requirements of Ir, one optical interface can connect multiple RRUs in series, and can connect up to 6 levels of RRUs. [0003] The management message sent by the BBU to the RRU is encapsulated in an Ethernet message, such as image 3 shown. The CPU in the BBU encapsulates the management messages in Ethernet packets and sends them to the local FPGA (Field Programmable Gate Array, Field P...

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Problems solved by technology

[0004] Using the above solution, the FPGA will not distinguish which RRU the Ethernet message goes to, and will transmit a copy of the Ethernet message on each fiber, which seriously wastes the transmission bandwidth of the Ir interface.

For example, assuming that the management channel bandwidth of each fiber on the Ir interface is 10 Mbps, one RRU can originally enjoy the 10 Mbps bandwidth exclusively. However, if image 3 As shown, assuming that the BBU transmits management messages to the RRU on all four optical fibers, the management messages will be repeatedly transmitted on multiple optical fibers. Then, the RRU can actually only enjoy the bandwidth of 2.5 Mbps, which seriously wastes the resources of the Ir interface. , when the BBU upgrades the software version of the RRU, the contradiction is particularly prominent

[0005] On the other hand, if the RRU receives useless management messages, the processing capacity of the RRU will be wasted, because a large number of management messages are transmitted to the RRU through the Ir interface, and the RRU will judge whether the destination MAC address of the management messages is the MAC address of the RRU, thereby Determine whether the received management message is forwarded to the upper layer or discarded. Since many of the management messages that are repeatedly sent are not sent to the RRU, the processing capacity of the RRU will be wasted

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