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Communication device and band allocation method

A communication device and a technology for frequency band allocation, which are used in multiplexing communication, data exchange through path configuration, time division multiplexing systems, etc. The effect of utilization efficiency

Inactive Publication Date: 2013-03-20
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when the ONU with the high data transfer rate is fully prioritized, there is also a problem that the data delay of the ONU with the low data transfer rate increases

Method used

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  • Communication device and band allocation method
  • Communication device and band allocation method
  • Communication device and band allocation method

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Embodiment Construction

[0027] Hereinafter, preferred embodiments of the communication device and the frequency band allocation method according to the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by this embodiment.

[0028] figure 1 It is a block diagram schematically showing the configuration of an embodiment of a PON system including the communication device according to the present invention. The PON system has the following structure: a master station device (hereinafter referred to as OLT) 10 and a plurality of slave station devices (hereinafter referred to as ONU) 20-1, 20-2, ..., 20-n are provided with splitters 30 The optical fibers 40 are connected in a one-to-many manner. The OLT 10 is also connected to an upper layer network, and the ONUs 20 - 1 to 20 - n are connected to terminal devices owned by each home, business, etc., respectively. In addition, the ONUs 20-1 to 20-n are composed of various devices havin...

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Abstract

To obtain a communication device that provides a bandwidth allocation opportunity to an ONU having a plurality of data transmission rates, not depending on any specific bandwidth-request notifying method, thereby realizing fair upstream transmission data delay between data transmission rates of respective ONUs. The communication device includes a bandwidth-update-cycle division processor 13 that calculates a required bandwidth request amount ratio for each of the data transmission rates based on a communication quality set for each of slave station devices 20-1 to 20-n and divides the bandwidth update cycle into slots of each of the data transmission rates by using the ratio, a bandwidth-allocation-amount calculating unit 14 that allocates a bandwidth to the slave station devices 20-1 to 20-n having a corresponding data transmission rate in a slot of the data transmission rate, and a transmission-start-time calculating unit 15 that sets a transmission start time and a transmission time of data of the slave station devices 20-1 to 20-n, based on an overhead length of a data frame transmitted by the slave station devices 20-1 to 20-n.

Description

technical field [0001] The present invention relates to a communication device and a frequency band allocation method used in a communication system in which one master station device and a plurality of slave station devices are connected in a one-to-many manner. Background technique [0002] As one of the access system networks that connect each home, business, etc. A PON (Passive Optical Network: Passive Optical Network) system in which station devices (hereinafter referred to as ONU (Optical Network Unit: Optical Network Unit)) perform one-to-many connection. In such a one-to-many PON system, when the upstream data communication from the ONU to the OLT is performed, the ONU sends to the OLT a bandwidth request signal indicating the bandwidth requirement of the device, and the OLT allocates data to each OLT according to the bandwidth requirement of each ONU. The ONU allocates a frequency band, and transmits a transmission permission signal indicating the transmission star...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/44H04B10/2581
CPCH04J3/1694
Inventor 田中正基菊泽隆司
Owner MITSUBISHI ELECTRIC CORP
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