Unlock instant, AI-driven research and patent intelligence for your innovation.

Data transmission method and device based on time division multiplexing link

A technology of time division multiplexing and link, applied in the field of data transmission method and device based on TDM link, can solve the problem of incompatibility of TDM link and data service type, achieve universality, improve transmission efficiency, and save cost Effect

Inactive Publication Date: 2009-01-14
DATANG MOBILE COMM EQUIP CO LTD
View PDF0 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In view of this, the present invention provides a data transmission method based on a TDM link to solve the problem that the existing solutions are not common to TDM links and data service types;

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Data transmission method and device based on time division multiplexing link
  • Data transmission method and device based on time division multiplexing link
  • Data transmission method and device based on time division multiplexing link

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] See image 3 , is a schematic diagram of the internal structure of the DOT device provided by the present invention. DOT includes a sending end and a receiving end, where the sending end communicates with the peer receiving end, and the receiving end communicates with the peer DOT receiving end. In order to indicate the entire DOT structure, image 3 Only the internal structure of the local DOT is shown, and the internal structure of the remote DOT is corresponding. During specific implementation, the DOT device can be implemented based on a Field Programmable Gate Array (Field Programmable Gate Array, FPGA), a complex variable logic device (Complex Programmable Logic Device, CPLD) or a digital signal processing (Digital Signal Processing, DSP) chip. Large-scale network equipment such as SDH exists independently, which is conducive to the miniaturization and independence of equipment, and can be oriented to terminals, which can greatly reduce the cost of network constr...

Embodiment 2

[0151] In the data frame structure in the first embodiment, a frame header checksum and a payload checksum are included to determine whether the data frame is correct or not. Specifically, the sending end calculates the checksum and adds it to the data frame; the receiving end recalculates the checksum and compares it with the checksum of the data frame. However, this method of only judging the checksum cannot be guaranteed to be correct sometimes. For example, due to fixed interference or the transmission of some fixed codes, the checksum is correct. In fact, the data transmission is wrong due to interference. At this time, only use Checksums are unreliable.

[0152]Therefore, on the basis of Embodiment 1, Embodiment 2 introduces a "characteristic code" into the data frame. This characteristic code is agreed in advance by the sending end and the receiving end. After the receiving end parses the data frame, it further compares the characteristic code. Ensure data security. D...

Embodiment 3

[0156] In the actual operation of the system, the link may be damaged. At this time, the receiving end can report back to the sending end through the "link synchronous monitoring" function.

[0157] Specifically, the link adaptation unit 3022 at the receiving end performs this function. When the time slot combination unit 3021 cannot form a complete multiframe due to a link being damaged, the link adaptation unit 3022 reports back through all links At the sending end, do not send any more signals over the broken link. Although one link is damaged, the sending end can still receive this notification through other links, then, correspondingly, the link maintenance module 3013 and the time slot distribution module 3014 of the sending end will adjust the link adaptively.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a data transmission method based on Time Division Multiplexing link characterized in that transmission comprises steps of packaging data to be relayed to the business type data frame according to preset or self-adaptively recognized business type; assembling link control information according to advanced agreement; loading separately at preset control time slot and business time slot with control information and data frame on time division multiplexing link for transmission; receiving comprises: receiving and identifying control information and data frame from the time division multiplexing link according to system preset control time slot and business time slot; analyzing data frame after determining correspondence of received control information and agreed control information, converting playload to business type corresponding signal outer network can receives. The invention accomplishes dual commonality of data business type and time division multiplexing link. The invention also provides a data transmission device based on time division multiplexing link corresponding to above-mentioned method.

Description

technical field [0001] The present invention relates to the field of time division multiplexing (Time Division Multiplex, TDM) communication technology, in particular to a data transmission method and device based on a TDM link. Background technique [0002] TDM links include various types, for example, based on Plesiochronous Digital Hierarchy (PDH), Synchronous Digital Hierarchy (SDH), Synchronous Optical Network (Synchronous Optical Network, SONET), E1 and E3 links, etc. . With the development of various communication services, types of data services are also increasing, for example, data based on Internet Protocol (Internet Protocol, IP), Ethernet (Ethernet), and Asynchronous Transfer Mode (Asynchronous Transfer Mode). How to transmit data of various business types on various TDM links is a topic worthy of attention. [0003] At present, there are mainly two schemes for using TDM links to transmit service data, one is "Ethernet data transmission in SDH / SONET" (Ethernet...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/22
Inventor 李享中
Owner DATANG MOBILE COMM EQUIP CO LTD