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Ascending bandwidth authorizing method for Gilbert passive light network

A technology of passive optical network and bandwidth authorization, which is applied in the direction of data exchange network, digital transmission system, electrical components, etc., can solve the problems of few bandwidth authorization methods, T-CONT does not have good support, etc., to achieve dynamic bandwidth The effect of allocation, shortening the scheduling cycle, and streamlining the algorithm

Active Publication Date: 2007-11-07
ZTE CORP
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Problems solved by technology

[0009] However, most of the current research reports on GPON DBA are algorithm design and implementation methods for dynamically allocating bandwidth, and there are few discussions on bandwidth authorization methods, and there is no good support for the five types of T-CONT specified in the GPON protocol.

Method used

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  • Ascending bandwidth authorizing method for Gilbert passive light network
  • Ascending bandwidth authorizing method for Gilbert passive light network
  • Ascending bandwidth authorizing method for Gilbert passive light network

Examples

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Embodiment Construction

[0024] Figure 1 shows a simple DBA workflow, whether SR-DBA or NSR-DBA, can be simply divided into two main parts: bandwidth allocation and bandwidth authorization. The algorithm of bandwidth allocation is relatively simple and mature, while the algorithm of bandwidth authorization is relatively complicated, and is limited by the processing capacity of the processor under the condition of software implementation of DBA.

[0025] In the current DBA implementation technology, there are two typical bandwidth authorization algorithms. One is to use several frames occupied by the entire BWMAP table sequence as a continuous logical frame. The time slot authorization period of T-CONT is the length of this logical frame, and all bandwidth time slots of T-CONT are arranged from the beginning of this logical frame. , in sequence, this bandwidth authorization method is simple and easy to implement, with small time overhead and relatively high bandwidth utilization. But in practice, it i...

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Abstract

A up-link bandwidth authorizing method of Gilbert passive optical network includes confirming BWMAP table number requiring to be set up in each DBA dispatch period and forming BWMAP table series, dividing BWMAP table series to be a numbers of BWMAP table sub-series, confirming authorization time slot period and time slot size of each T-CONT, sequencing all T-CONT as per authorization time slot period, arranging time slot for each T-CONT in sequence and forming temporary BWMAP table series and setting up final BWMAP table series being able to be identified by hardware through temporary BWMAP table series.

Description

technical field [0001] The present invention relates to a passive optical network system (Passive Optical Network, XPON), in particular, to an uplink bandwidth authorization method of a Gigabit-capable PON (GPON), which can realize a dynamic bandwidth allocation (DBA) function . Background technique [0002] GPON is a flexible gigabit optical fiber access network proposed by ITU-T (International Telecommunication Union Telecommunication Standardization Organization), which supports broadband full-service access for commercial and residential services. [0003] GPON is a one-to-many tree structure in physical topology. The downlink data transmission adopts the broadcast mode, and the OLT (Optical Line Terminal, Optical Line Terminal) broadcasts data packets to each ONU (Optical Network Unit, Optical Network Unit), and the ONU extracts its own data packets and ignores other data packets. The uplink uses time division multiplexing (TDM). The OLT authorizes the uplink time slo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L5/14
Inventor 严技凯
Owner ZTE CORP
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