System and method for realizing encapsulation mode frame recombination of gigabit passive optical network

A technology of passive optical network and encapsulation mode, applied in the system field of realizing GEM frame reassembly

Active Publication Date: 2009-10-07
SANECHIPS TECH CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0006] The present invention provides a system and method for realizing frame recombination in gigabit passive optical network encapsulation mode, so as to solve the problem of using a large number of storage resources to buffer GEM frame tail data

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  • System and method for realizing encapsulation mode frame recombination of gigabit passive optical network
  • System and method for realizing encapsulation mode frame recombination of gigabit passive optical network
  • System and method for realizing encapsulation mode frame recombination of gigabit passive optical network

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Embodiment Construction

[0033] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] Such as Figure 4 As shown, it is a schematic structural diagram of a system for realizing GEM frame reassembly in an embodiment of the present invention. The system includes a GEM frame header processing module, a payload reassembly processing module, and a reorganization table checking module, wherein:

[0035] The GEM frame header processing module is used to read the GEM frame header after receiving the GEM frame to obtain its port identifier (Port ID), payload length indicator (PLI) and payload type indicator (PTI) );

[0036] The module of checking the reorganization table is used for when the payload reorganization processing module carries out the reorganization of the payload, and starts to search the reorganization table (as shown in the following table 1) according to the port identifier, to obtain...

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Abstract

The invention discloses a system for realizing GEM frame recombination, comprising a GEM frame head processing module and a payload recombination processing module. The invention also discloses a method for realizing the GEM frame recombination, comprising the following steps: 1) after receiving GEM frames, the GEM frame head processing module reads GEM frame heads to obtain interface identifiers of the GEM frame heads; 2) the payload recombination processing module applies a storage space for the GEM frames of a same interface identifier in an external memory, and writes a first GEM frame payload to a pointed address space of the external memory, as for sequent GEM frame payloads of the interface identifiers, if the tail part of the previous GEM frame is judged with slack bytes written in, the slack bytes of the tail part of the previous GEM frame are covered by the sequent GEM frame payload, and then the sequent GEM frame payloads are sequentially written into a sequent address space of the external memory. The invention can realize the GEM frame recombination on the basis of Port ID with least resources and support the interleave transmission of different Port ID data.

Description

technical field [0001] The invention relates to a GPON (Gigabit Passive Optical Network) system, in particular to a system and method for realizing GEM (GPON Encapsulation Mode) frame reassembly. Background technique [0002] GPON is an optical access network technology, which consists of three parts: OLT (Optical Line Terminal), ODN (Optical Distribution Network) and ONU (Optical Network Unit). It is a kind of passive ODN connection between OLT and ONU. Network Architecture. The format of GTC (GPON Transmission Convergence, GPON transmission convergence layer) frame is used for data transmission between OLT and ONU. The format of GTC frame is as follows: figure 1 As shown, among them, PLOu, Physical Layer Overhead upstream, upstream physical layer overhead; PLOAMu, Physical Layer Operations, Administration and Maintenance upstream, upstream physical layer operation management and maintenance; PLSu, Power LevelingSequence upstream, upstream power control sequence number; DB...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/00H04L29/06
Inventor 吕舒予娄本刚
Owner SANECHIPS TECH CO LTD
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