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A data transmission method and device in coaxial Ethernet

A data transmission method and Ethernet technology, applied in the field of data transmission methods and equipment, can solve the problems of wasting bandwidth and unable to carry data information, and achieve the effect of saving bandwidth and improving transmission efficiency.

Inactive Publication Date: 2008-04-23
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And when the Report frame or Gate frame does not carry 8 queues, the idle part cannot carry other data information
These idle parts are still transferred in each transfer between CLT and CNU, thus causing a waste of bandwidth

Method used

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  • A data transmission method and device in coaxial Ethernet
  • A data transmission method and device in coaxial Ethernet
  • A data transmission method and device in coaxial Ethernet

Examples

Experimental program
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Embodiment Construction

[0063] In the current coaxial Ethernet switch, the CNU reports the status and request of the CNU by sending a Report frame to the CLT. The format of the Report frame is as shown in Figure 3. It is stipulated in the prior art that the Report frame can carry 8 queues at most. The present invention uses two queues as an example with the CNU. These two queues are respectively HP (High Priority, high priority ) queue and LP (Low Priority, low priority) queue, so the CNU reports the lengths of the two queues to the CLT through 8 bytes in the Report frame.

[0064] As shown in Figure 3, the lengths of the fields carried in the Report frame are: MPCPDU-DA (MPCPData Unit-Destination Address, MPCP protocol unit-destination address) 6 bytes in total, SA (Source Address, source address) 6 characters in total Section, Length / Type (length / type) 2 bytes in total, ProType (frame type) 2 bytes in total, Timestamp (time stamp) 3 bytes in total, QueueNum (queue number) 1 byte in total, Flags (id...

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Abstract

The method includes steps: CNU device obtains data needed to send to CLT device down going devices; CNU device adds the data to Report frame and sends the data to CLT device. The method also includes steps: CLT device obtains data needed to send to CNU device from up layer of network; CLT device adds the data to Gate frame, and sends the data to CNU device. The invention also discloses CNU device and CLT device in use for data transmission in coaxial Ethernet. In the method, service data and control information carries by Report frame and Gate frame interacted between CNU device and CLT device so as to take full advantage of outband data existed in Report frame and Gate frame possibly. The invention raises efficiency for transferring data in coaxial Ethernet as well as saves bandwidth.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a data transmission method and equipment in coaxial Ethernet. Background technique [0002] The coaxial Ethernet switch uses coaxial cable as the transmission medium, integrates the functions of Ethernet switch and multi-point control, and uses the existing coaxial cable of the cable TV network to realize the user's home access, with low cost. [0003] A typical EOC (Ethernet over Coax, Ethernet access based on coaxial network) system includes CLT (Coaxial Line Terminal, coaxial cable carrying Ethernet head end), CNU (Coaxial Network Unit, coaxial cable carrying Ethernet terminal) , branch distributor and coaxial cable. Communication between CLT and CNU is based on multi-point control protocol. A schematic diagram of its connection mode is shown in Fig. 1 . [0004] The CLT acts as a GE (Gigabit Ethernet, 1000M transmission rate Ethernet) port, and the data stream is an ...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L12/28H04L47/525
Inventor 文闻
Owner NEW H3C TECH CO LTD
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