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Multiple business realizing method based on ethernet passive optical network

A passive optical network, Ethernet technology, applied in the multi-service implementation field of Ethernet passive optical network, can solve the problem of not mentioning video service transmission mode, not providing service type/service priority identification, lack of compatibility and Scalability and other issues, to achieve the effect of reducing design, reducing delay, and improving transmission efficiency

Active Publication Date: 2005-03-30
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Providing multi-service transmission on Ethernet based on the second layer is attracting attention in the industry. Zarlink Semiconductor provides an optional solution for Ethernet and TDM voice services. However, this solution does not provide related service types / Service priority identification, and does not mention the transmission mode of video services
Another company named Teknovus proposed a product TK3501 that uses the bit / byte difference between physical layers to transmit TDM voice services, and inserts TDM data into the physical layer code stream of Ethernet. This solution completely changes the Ethernet Physical layer specification, lack of compatibility and scalability

Method used

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  • Multiple business realizing method based on ethernet passive optical network
  • Multiple business realizing method based on ethernet passive optical network
  • Multiple business realizing method based on ethernet passive optical network

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Embodiment Construction

[0039] figure 2 It is a schematic diagram of IEEE 802.3 Ethernet frame structure. The Ethernet frame preamble (PREAMBLE) field 100 includes a 7-byte preamble (Pre) field 101 for frame synchronization or physical stabilization by acting as a specific bit stream in front of the frame start part, and by acting as a specific format bit The role of the stream is to represent the 1-byte start frame delimiter (SFD) field 102 of the frame start; respectively have a 6-byte destination address (DA) field 110 and a source address (SA) field 120; represent data (Payload area unit) 2-byte length / type (LDF / TYP) field 130 of field length; Variable payload area unit (PDU) field 140 in the range of 0 to 1500 bytes, when the data of the PDU field When the size is smaller than the minimum frame size, the MAC layer will add some variable padding characters (PAD); and a 4-byte frame check sequence (FCS) field 150 to ensure correct transmission. The industry uses cyclic redundancy check (CRC) ) ...

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Abstract

Carrying out marking service type / priority for data frame in Ethernet, request frame for allocating dynamic bandwidth of OAM (operation, administration and maintenance), and frame for authorizing bandwidth allocation, the method further provides method of dynamic bandwidth allocation, and processing method for transmitting and receiving multiple service data in use for EPON (Ethernet passive optical network). Features are: compatible to current format of standard frame in Ethernet, encapsulation and transmission of multiple services in MAC layer directly so as to raise transmission efficiency of network, as well as provide to realize differentiated services on EPON for different service types.

Description

(1) Technical field [0001] The invention relates to a passive optical network (PON) system, in particular to a multi-service realization method for an Ethernet passive optical network (EPON). (2) Background technology [0002] Due to its low cost, mature technology and high bandwidth, Ethernet has been widely used in metropolitan area networks and wide area networks, and is gradually penetrating into access networks. And EPON is becoming the main solution for Ethernet access segment, figure 1 It is a typical EPON broadband access network, which is composed of the optical line terminal (OLT) 10 at the central office and the optical network unit (ONU) 12i (i=a, b, c) at the user end. The device 11 shares the transmission medium, which is a typical point-to-multipoint network, in which the downlink data is transmitted by broadcasting, and the uplink is transmitted by time division multiplexing (TDM), and the OLT performs unified scheduling and bandwidth allocation for each ONU...

Claims

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Application Information

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IPC IPC(8): H04B10/25H04L12/24H04L12/28
CPCH04L12/24H04Q2011/0064H04Q11/0067H04L41/00H04Q2011/0084H04L41/34
Inventor 齐江穆罕默德·倪泽姆冷晓冰赵岩
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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