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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: 2009-10-14
ZTE CORP
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AI Technical Summary

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 it is 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 practic...

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Abstract

The present invention provides a GPON uplink bandwidth authorization method, comprising: Step S302, determining the number of BWMAP tables that need to be constructed in each DBA scheduling period, and forming a BWMAP table sequence; Step S304, dividing the BWMAP table sequence into several BWMAP table subsequence; step S306, determine the authorized time slot period and the authorized time slot size of each T-CONT; step S308, sort all T-CONTs according to the authorized time slot period; step S310, sequentially for each T-CONT CONT arranges time slots, and builds a temporary BWMAP table sequence; step S312, constructs a final BWMAP table sequence that can be recognized by hardware through the temporary BWMAP table sequence. Therefore, the scheduling cycle of the DBA is shortened, and the dynamic bandwidth allocation function is better realized.

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 Patents(China)
IPC IPC(8): H04L12/24H04L5/14
Inventor 严技凯
Owner ZTE CORP
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