Passive optical network bandwidth allocation method

A bandwidth allocation method and passive optical network technology, applied in the field of bandwidth allocation of passive optical networks, can solve the problems of increased delay and bandwidth waste, and achieve the effect of reducing delay and improving bandwidth utilization.

Active Publication Date: 2015-06-24
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the existing PON technology is aimed at the situation of accessing a large number of optical network units (ONUs) within the range of the long-distance passive optical network PON. When copying downlink packets through the OLT, it will cause delay due to a large number of copies and sequential transmission. increase, but also cause unnecessary waste of bandwidth

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Embodiment Construction

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0042] Such as figure 1 As shown, this embodiment discloses a bandwidth allocation method of a passive optical network PON, and the method may include the following steps:

[0043] S1. After receiving the request bandwidth allocation data packet sent by the central optical network unit CONU, the optical link terminal OLT performs bandwidth allocation according to the p...

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Abstract

The invention discloses a passive optical network bandwidth allocation method. The passive optical network bandwidth allocation method comprises the steps that after an optical link terminal (OLT) receives a request bandwidth allocation data package sent by a center optical network unit (CONU), bandwidth allocation is carried out according to a preset dynamic bandwidth allocation (DBA) rule; the OLT obtains a first logical link identifier (LLID1) and a second logical link identifier (LLID2) in the request bandwidth allocation data package according to the request bandwidth allocation data package; the OLT packages a bandwidth allocation result in a bandwidth allocation result data package through the LLID1 and the LLID2; the OLT sends the bandwidth allocation result data package to the CONU. The method is applicable to the long-distance PON, the DBA is finished through two levels of control mechanisms in the mode that ONUs are grouped, the ONUs adopt the LLID1 and the LLID2 and an intelligent ODU is utilized, the bandwidth requirement of users can be met, the bandwidth utilization rate is improved, and the time delay is reduced.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to a bandwidth allocation method of a passive optical network. Background technique [0002] With the further advancement of full-service operations and the explosive growth of users' demand for voice and video data, the metropolitan area network is undergoing rapid reform, while the access network, as the part closest to the user end, has been greatly impacted. Optical fiber has become an undoubted communication medium. Passive Optical Network (PON), as the mainstream technology of access network, bears a great responsibility, but operators encounter many unavoidable problems when deploying access networks. For example, on the premise of saving equipment investment, how to use limited bandwidth resources to improve user experience, and how to rationally arrange Optical Network Units (Optical Network Unit, ONU) in places with relatively low user density (such as ...

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Application Information

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IPC IPC(8): H04Q11/00H04L12/917H04L47/76
Inventor 张民刘晶丹王丹石杨洋张治国
Owner BEIJING UNIV OF POSTS & TELECOMM
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