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Data link protection method and system based on load sharing mode

A technology of load sharing and data link, which is applied in the direction of digital transmission system, selection device of multiplexing system, transmission system, etc., and can solve the problem of delay difference of data message, no longer applicable, disordered order of data message, etc. question

Active Publication Date: 2015-04-01
ZTE CORP
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Problems solved by technology

However, there are still two problems in the load sharing method: first, the transmission distance between the OLT and the ONU in the PON system is up to 20KM. The difference in transmission delay makes the order of data packets confusing; secondly, since the PON system is a point-to-multipoint network, for uplink data, the available bandwidth of each ONU is dynamically changed, so in the traditional The static load sharing algorithm used in the point-to-point network will no longer be applicable

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  • Data link protection method and system based on load sharing mode
  • Data link protection method and system based on load sharing mode
  • Data link protection method and system based on load sharing mode

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Embodiment Construction

[0038] The basic idea of ​​the present invention is: when the uplink data is transmitted, after the ONU receives the uplink data message through the logical port, it transmits the uplink data message to the buffers of the two physical ports corresponding to the logical port according to the dynamic load sharing algorithm, and buffers each The uplink data packets in the package are encapsulated and transmitted to the OLT; the OLT reorders the received uplink data packets and transmits them to the upper layer equipment through the uplink port; during the downlink data transmission, the OLT receives the downlink data packets through the logical port Then, according to the static load sharing algorithm, it is transmitted to the caches of the two physical ports corresponding to the logical port, and the downlink data packets in the respective caches are encapsulated and then transmitted to the ONU; the ONU reorders the received downlink data packets After that, it is transmitted to ...

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Abstract

This invention discloses a data link protection method and system based on load distribution. During uplink data transmission, an ONU (optical network unit) receives uplink data messages via logic ports, transmits the messages to caches of two physical ports corresponding to the logic ports according to dynamic load distribution algorithm, and then transmits the uplink data messages in each of the caches to an OLT (optical line terminal) after encapsulation; the OLT reorders the uplink data messages, and transmits the messages to an upper layer device via ports connected to the upper; during downlink data transmission, the OLT receives downlink data messages via logic ports, transmits the messages to the caches of the two physical ports corresponding to the logic ports according to static load distribution algorithm, and then transmits the downlink data messages in each of the caches to the ONU after encapsulation; the ONU reorders the downlink data messages, and transmits the messages to user device via user side ports. This invention can effectively improve the transmission efficiency of the primary and backup links in a PON (passive optical networks) system, and improve the system bandwidth.

Description

technical field [0001] The invention relates to a data link protection technology of a passive optical network (PON, Passive Optical Networks) system, in particular to a data link protection method and system based on a load sharing mode. Background technique [0002] The PON system is a point-to-multipoint network system. The network element equipment in the PON system includes: Optical Line Terminal (OLT, Optical Line Terminal), Passive Optical Network Unit (ONU, Optical Network Unit) and Passive Optical Network A terminal (ONT, Optical Network Termination); wherein, the OLT is the equipment at the central office side, and the ONU and the ONT are both equipment at the user side. OLT and ONU / ONT are connected by Optical Distribution Network (ODN, Optical Distribution Network). ONU provides direct or remote user-side interface. The ONU with the user port function, the ONU mentioned later in this article includes the ONT. [0003] In the optical distribution network of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/747H04Q11/00
CPCH04Q11/0062H04Q2011/0081H04L45/245H04L45/28H04Q11/0067
Inventor 曾定洲
Owner ZTE CORP
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