Communication network system including ring network that performs communication through multiple switching devices
AssigneeKabushiki Kaisha Toshiba
InventorsTakamitsu Chikenji, Michiaki Eri
Life of this patent
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Abstract
Two between-ring connection node devices are placed between ring networks A and B, these are connected by between-ring transmission lines for which it is possible for each of the items that face each other to switch between current use lines and spare lines, and for each ring network, the two between-ring connection node devices are operated to switch between being a current use system or a spare system. While being able to avoid communication interruptions between ring networks due to faults of the between-ring connection node device itself, it is also possible to avoid communication interruption when line switching fails between-ring transmission lines, and thus to increase fault resistance.
Claims45
A communication network system that has multiple switching devices connected on a ring transmission line, including first and second ring networks that perform communication via the multiple switching devices;
- first and second ring networks comprising:
- first and second between-ring connection devices, within the first ring network, each connected with a facing one of first and second between-ring connection devices within the second ring network by a between-ring transmission line that includes a duplex line, each of the first and second between-ring connection devices having a between-ring communication means that performs, between facing ones of the between-ring connection devices, mutual communication of first control information, and performs line switching control with the other one of the first and second ring networks through the between-ring communication means so as to make one of the duplex between-ring transmission lines to be a current use system and other one to be a standby system;
- and
- a control device that performs switching control for operating one of the between-ring connection devices as the current use system, and the other one as the standby system, the control device having a ring internal communication means that performs, between the first and second between-ring connection devices, mutual communication of second control information;
- wherein, between the first and second ring networks, current use communication is performed via the between-ring transmission line that connects the between-ring connection devices that operate as the current use system, and the between-ring transmission line that connects the between-ring connection devices that operate as the standby system is used as a standby line.
A communication network system, wherein multiple switching devices are connected on a ring transmission line, and the system has a ring network that performs communication via those multiple switching devices;
- first and second control devices that control the multiple switching devices are installed on the ring transmission line;
- the first control device operates as a current use system control device that actually controls the multiple switching devices;
- and
- the second control device monitors the first control device, when a fault occurs with that first control device, operates as a standby system control device that performs control of the multiple switching devices in place of the first control device, establishes a virtual channel connection for those multiple switching devices along with start of control of the multiple switching devices in place of the first control device, and at the same time notifies those multiple switching devices that the control device has been switched.
A communication network system comprising multiple switching devices connected on a transmission line and being composed from a network that performs communication via these multiple switching devices;
- a first management device and a second management device that are connected to the network via one of the switching devices, each of which manages all switching devices within this network;
- the first and second management devices comprising a self notification destination switching instruction means that issues self notification destination switching instructions to the switching devices saying to switch the notification destination of the self notification;
- and the switching devices each comprising a self notification means that performs self notification of an operating status thereof only to the management device instructed as the self notification destination of the first and second management devices;
- and
- a self notification destination switching means that switches the self notification destination according to the self notification destination switching instructions issued from the first or second management device.
A communication network system having multiple switching devices connected on a transmission line, and being composed from a network that performs communication via these multiple switching devices;
- a management device that manages all the switching devices within the network;
- and
- first and second network connection devices that are placed on the transmission line and that have a function for connecting the management device to the network;
- the first and second network connection devices each comprising a path information notification means that notifies path information for reaching the transmission line via an associated one of the first and second networks devices at the management device;
- and
- a path information variable setting means that manages by weighting the path information while also making variable settings for the weighting;
- the management device comprising a path selection means that selects a path via the path information notification source that has the smallest weight, having referred to the path information weighting notified from the first and second network connection devices.
A communication network system comprising a network that connects multiple switching devices on a transmission line, and performs communication via these multiple switching devices;
- and
- a management device that manages all switching devices within the network, the management device being connected to the network;
- the switching devices comprising a means of processing management to be done that generates management information required by the management device in order to manage the switching devices and independently notifies the management information using a specified protocol to the management device;
- the management device comprising a management processing means that manages the management information obtained by a specified protocol that is notified from the means of processing management to be done;
- and
- a display processing means that performs display processing for a display means based on the management information managed by the management processing means.
Dependencies are inferred from the claim text.