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Light wave length exchanging method based on full network synchronous time slot

A network synchronization and optical wavelength technology, applied in the network field, can solve problems such as insufficient network flexibility, bandwidth waste, and optical network service congestion, and achieve the effects of improving utilization and flexibility, reducing routing, and increasing the number of link channels

Inactive Publication Date: 2004-07-14
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

The smallest unit of these three connections is calculated by wavelength channel, and the traffic transmitted by each user on a single wavelength in an actual network is often much smaller than the maximum traffic that a single wavelength can carry, so this switching connection unit This results in a serious waste of bandwidth; in addition, limited to cost and business volume, only a few nodes in the entire network can have the wavelength conversion function, and each node can only perform cross-connection of limited wavelength channels, which will easily lead to optical network service provision. congestion, the flexibility of the network is not enough

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  • Light wave length exchanging method based on full network synchronous time slot
  • Light wave length exchanging method based on full network synchronous time slot
  • Light wave length exchanging method based on full network synchronous time slot

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Embodiment Construction

[0020] See Figure 1- Figure 4 :

[0021] 1) Firstly, all optical switching nodes (hereinafter referred to as OXC) of the entire network and user network interfaces (hereinafter referred to as UNI) at the edge of the network must perform optical switch switching operations and change wavelength transmission services at a unified time point. There are two ways, one is to rely on the clock provided by the clock synchronization network to time the equipment, and the other is to not need the clock provided by the clock synchronization network when there are not many nodes and the internal clock synchronization of each OXC is relatively accurate, and each The internal clock of the node is directly output to the device for timing.

[0022] 2) The all-optical network control layer uniformly sets each time interval with a time length of t as a time slot, and N time slots as a cycle. The time slots in the entire network are synchronized. Each device starts the first time slot in the ...

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Abstract

A light wavelength exchange method based on a network wide synchronous, time slot characterizes in applying light time slot as the service transfer structure smallest exchange connection unit, all nodal points carry out light channel cross connection dispatch according to each related I / O port connection allocation table in an unified time slot synchronization, edge user network interfaces transfer services, based on related service time slot image tables, solving the problem of cross connection and route based on wavelength.

Description

technical field [0001] The invention belongs to the category of network technology, and is a method for configuring an optical channel connection for data transmission in an optical network. Background technique [0002] At present, there are two more realistic optical switching methods used in all-optical networks. One is circuit switching with wavelength routing, that is, automatic switching optical network (ASON) based on connection, and the other is optical burst switching (OBS). ). Automatically Switched Optical Network (hereinafter referred to as ASON) introduces an independent control plane into the optical network to implement dynamic configuration and connection management, so as to automatically and dynamically allocate optical channels according to user needs. The core technologies of the ASON architecture include signaling protocols for establishing, maintaining, and dismantling management of distributed connections; routing protocols for providing routing servi...

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Application Information

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IPC IPC(8): H04L12/801H04Q3/52H04Q11/00
Inventor 纪越峰赵剑力高鹏张志远
Owner BEIJING UNIV OF POSTS & TELECOMM
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