Kilomega Ethernet passive optical network up-flow-section integrating bandwidth distributing method

Abstract

Based on sectional type list of tail coordinates about quantity of subchannel bandwidth occupied as prepared distribution scheme, assigned quantities of subchannel bandwidth are realized. Using integral processing unit collects quantities of subchannel bandwidth. Sending out signal of requesting bandwidth according to size authorized by EPON system completes granting for quantity information so as to realize bandwidth distribution of up going flow on EPON system. Steps for bandwidth distribution are as following: interface of microprocessor sends out enable signal for reading / writing control; based on prepared distribution scheme, bandwidth designator converts and designates subchannel bandwidth to realize rearrangement of main / standby multiplexing; integral bucket corrects quantities of subchannel bandwidth occupied; based on request, authorization generating circuit sends signal of leaking command to control leaking operation of integral bucket so as to realize distribution.

Description

technical field [0001] The invention relates to an upstream bandwidth allocation method based on a Gigabit Ethernet passive optical network (Ethernet Passive Optical Network, referred to as EPON) system, which belongs to the field of optical fiber communication, and in particular relates to a segmented integration method based on an EPON upstream High precision bandwidth allocation method. technical background [0002] In the prior art, the most similar to the present invention is the bandwidth group control table allocation method based on the asynchronous transfer mode passive optical network, and a kind of Sbus SAR cell dismantling device adopting this type of allocation method is TNETA1560 of TI Company. The bandwidth group control table allocation method based on the asynchronous transfer mode passive optical network is a fixed bandwidth method, that is, a 1200 double word (4800 entries in total, ie 4800 bytes) bandwidth group control table is used as the allocated band...

AI Technical Summary

Problems solved by technology

This allocation method is relatively simple, but has the following disadvantages: 1. The accuracy is poor, and the bandwidth granularity is only 1 / 4800 of the total bandwidth. For the total bandwidth of 155M, the minimum value of the bandwidth change is 155M / 4800=32k; 2. Hardware The implementation is complicated, using 2×4800 registers, and 2×4800 bytes are used in the hardware master and backup registers; 3. The bandwidth update speed is low. Since there are 4800 table entries, it is time-consuming to modify the bandwidth and rewrite the table entries one by one, and the bandwidth The update speed is limited; 4. The corresponding asynchronous transfer mode cell has a fixed packet length, which is not suitable for the Ethernet packet, and the Ethernet packet itself is variable in length

Due to the above-mentioned shortcomings, the bandwidth group control table allocation method of the asynchronous transfer mode passive optical network is not suitable for application in the bandwidth allocation of the upstream flow of the Gigabit Ethernet passive optical network

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