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Upstream bandwidth allocation scheduling algorithm of O-OFDM (optical orthogonal frequency division multiplexing) access system

A bandwidth allocation and access system technology, applied in the field of optical fiber communication, can solve the problem of not considering the transmission of different priority services

Inactive Publication Date: 2013-04-17
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

This solution reduces system power consumption from the design of receiving and transmitting modules, mainly from the perspective of hardware, and does not involve reducing system energy consumption in terms of scheduling algorithms, nor does it take into account the transmission of services with different priorities

Method used

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  • Upstream bandwidth allocation scheduling algorithm of O-OFDM (optical orthogonal frequency division multiplexing) access system
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  • Upstream bandwidth allocation scheduling algorithm of O-OFDM (optical orthogonal frequency division multiplexing) access system

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Embodiment Construction

[0068] The idea, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of the present invention.

[0069] Wherein, Table 1 illustrates the meanings of the symbols used in the present invention.

[0070] Table 1

[0071]

[0072]

[0073] The algorithm of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0074] figure 1 A flow chart of an uplink bandwidth allocation and scheduling algorithm in an optical OFDM access system is shown, and the method specifically includes the following steps:

[0075] Step 101: Collect bandwidth requirements of each ONU.

[0076] Among them, in each polling cycle, the optical line terminal collects the required bandwidth R of each optical network unit in the system n , and summed to get the system required bandwidth R T . Tha...

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Abstract

The invention discloses an upstream bandwidth allocation scheduling algorithm of an O-OFDM (optical orthogonal frequency division multiplexing) access system. The upstream bandwidth allocation scheduling algorithm comprises the following steps of collecting a bandwidth requirement of each user; comparing whether bandwidth required by the system is larger than the maximum bandwidth capable of being provided by the system or not; if yes, enabling the power consumption of the system to be minimum on the premise of ensuring the service quality of each user; otherwise, keeping the fairness of each low-priority service on the premise of ensuring the high-priority service quality; and displaying a bandwidth allocation result and the total power consumption of the system. When the bandwidth requirements of the system are smaller than the maximum bandwidth capable of being provided by the system, the upstream bandwidth allocation scheduling algorithm disclosed by the invention can try hard to reduce the power consumption of the system on the premise of ensuring the bandwidth requirement of each ONU (optical network unit) so as to realize the purpose of energy saving; and when the bandwidth requirements of the system are larger than the maximum bandwidth capable of being provided by the system, the upstream bandwidth allocation scheduling algorithm can effectively allocate the bandwidth resource so as to be capable of ensuring that the system has the high-priority service quality and also to be capable of ensuring the fairness of the low-priority services.

Description

technical field [0001] The invention relates to optical fiber communication, in particular to an uplink bandwidth allocation and scheduling algorithm in an optical orthogonal frequency division multiplexing access system. Background technique [0002] Optical Orthogonal Frequency Division Multiplexing (OOFDM) technology is a new type of communication method that combines Orthogonal Frequency Division Multiplexing technology and optical fiber communication technology. It combines the characteristics of the two communication methods and has Strong technical advantages and broad application prospects. OOFDM technology divides the system bandwidth into mutually orthogonal subcarriers, and these subcarriers can be dynamically allocated among various optical network units (Optical Network Unit, ONU), realizing the sharing of the same optical fiber channel by multiple users, and improving the The total capacity of the system. Therefore, OOFDM technology is an effective technology...

Claims

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Application Information

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IPC IPC(8): H04L12/917H04L27/26H04Q11/00H04L47/76
Inventor 尤伟志义理林张为亚王刚张涛张严李正璇胡卫生
Owner SHANGHAI JIAO TONG UNIV
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