Dual-transmitting selective-receiving circuit and method

A technology of dual transmission and selective reception and circuit, which is applied in the direction of selection devices, electrical components, transmission systems, etc., and can solve problems such as the inability to know whether the working status of the receiving channel is normal, the time is long, and there is no link layer data detection function.

Inactive Publication Date: 2010-10-13
HUAWEI TECH CO LTD
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Problems solved by technology

[0004] However, in the above-mentioned system, since the link duplication device 21 itself has no detection function for link layer data, it is impossible to know whether the working status of another receiving channel is normal before the receiving channel is switched.
When both channels work abnormally, it is easy to cause frequent switching between the two receiving channels
In addition, it takes a long time to detect service channel line faults through software, and the switching time is long, which may lead to a large amount of data loss during switching

Method used

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Embodiment Construction

[0028] Such as image 3 As shown, the service board 12 includes a dual transmission and selective reception circuit 30 . The dual-transmit and selective-receive circuit 30 includes three physical interfaces, which are respectively an internal interface, a main channel interface and a backup channel interface. Wherein the internal channel interface is connected with other circuits inside the service board 12, which includes an internal interface receiving module 311 and an internal interface sending module 312, which are respectively used to receive signals from the internal circuit of the service board 12 and send signals to the internal circuit of the service board 12. The active channel interface and the standby channel interface are connected to the SFU through a Media Access Control (MAC) chip or a Physical Layer (PHY) chip, and are used for data transmission between the service board 12 and the SFU 11 . The main channel interface includes a main channel interface receivi...

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Abstract

A double transmission selective receiving circuit and method thereof, which contains transmitting respectively data to exchange network board through main and spare channel, detecting the work state of main and spare channel by transmitting/receiving the handshake frame used for double transmission selective receiving circuit, selecting main channel according to detection result, receiving data through main channel, said invention has short detection time without frequently switching between main and spare channel.

Description

technical field [0001] The invention relates to a data communication circuit and method in a switching network, in particular to a dual-transmit and selective-receive circuit and method. Background technique [0002] In application systems that require high reliability, dual-plane structures are widely used. figure 1 It is a topology structure diagram of a dual-plane solution in a Gigabit Ethernet (GE) switching network frame. like figure 1 As shown, two switching fabric boards 11 are respectively connected with service boards 12 to form two star switching planes. Each service board 12 sends data to two SFUs 11 at the same time when sending data, and only receives data from one of the SFUs 11 when receiving data. When the receiving channel fails, the service board 12 switches to another receiving channel Receive data from another SFU 11, which is dual-send selective reception. [0003] In the above-mentioned system, its dual transmission and selective reception is realiz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q1/20H04B1/74
Inventor 涂君李振亚项能武谢寿波张耀文雷春潘剑锋柳精伟
Owner HUAWEI TECH CO LTD
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