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Method and apparatus for echo wave filtering in EOC system

A filtering method and echo technology, applied in the field of communication, can solve problems such as difficult impedance matching, inability to use standard loads, and inability to add standard loads forcibly

Inactive Publication Date: 2008-01-23
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that in the actual network deployment process, it is difficult to achieve impedance matching through hardware, and it is impossible to force a standard load to be added when the user is powered off; in addition, the standard load cannot be used in branches and distributors.

Method used

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  • Method and apparatus for echo wave filtering in EOC system
  • Method and apparatus for echo wave filtering in EOC system
  • Method and apparatus for echo wave filtering in EOC system

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Embodiment Construction

[0041] The core idea of ​​the present invention is: add a new LLID field in the message transmitted between CLT and CNU, use it in combination with the original LLID field, and identify the sending source device and the destination device of the message at the same time. Through these two LLIDs, the device receiving the message can judge the source device of the message. When it is found that the source device of the message is the device, it can be considered that the message is generated by the echo. Therefore, it is directly discarded, thereby realizing automatic filtering of the echo message.

[0042] When the coaxial Ethernet switch system works in half-duplex or full-duplex mode, according to the IEEE802.3ah standard, the format of the data message between the CLT and the CNU is shown in Figure 2 below, including the following field: 0xD5, which indicates This message includes LLID information; LLID, LLID is dynamically assigned to each CNU by the CLT, and is used to uni...

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Abstract

The present invention discloses a back wave filtration method in an EOC system including procedures below: A target LLID and a source LLID in a received message are acquired. The message is judged according to the source LLID and the target LLID. As an equipment corresponding to the target LLID comprises a principal equipment and the source LLID does not correspond to the principal equipment, the message is processed or discarded. The present invention also discloses a network equipment for back wave filtration in an EOC system. The present invention realizes back wave data filtration with a network equipment in a coaxial Ethernet system by adding a source LLID and a target LLID into a message.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an echo filtering method and equipment in an EOC (Ethernet Over Coax, Ethernet access based on a coaxial network) system. Background technique [0002] Ethernet over coaxial cable uses coaxial cable as the transmission medium and integrates the functions of Ethernet switch and multi-point control. The user's home access is realized, and the existing coaxial cable of the cable TV network is used, and the cost is low. [0003] A typical EOC system consists of CLT (Coaxial Line Terminal, Ethernet head-end carried by coaxial cable), CNU (Coaxial Network Unit, Ethernet terminal carried by coaxial cable), branch distributor and coaxial cable. CLT and CNU use multi-point control protocol for communication. The coaxial interface of a CLT device can be connected to multiple CNU devices through video branches and distributors, and a schematic diagram of one of the connecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B3/23H04M9/08
Inventor 文闻郑海生肖冰
Owner NEW H3C TECH CO LTD
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