Line relaying device, tdm line detour system, and tdm line detour control method
AssigneeNEC Corporation
InventorsTsutomu Koike, Shunichi Kumagai
Life of this patent
Estimating the term…
Abstract
When a reduction in the transmission speed of the line preset as the TDM line transfer route is detected by a device-connecting line termination unit, a mapping request, to which information indicating the amount of TDM-line bandwidth overflowing from the line and a destination indicating the final line relaying device have been added, is generated by the mapping request processing unit, and transmitted via the other line to another device connected in a ring network in order to map the overflow amount of bandwidth added to the mapping request on each line sequentially from the other device to the line relaying device as the final transfer destination, thereby forming a TDM-line detour route.
Claims9
A line relaying device for relaying transmission of data through a communication line, the device constituting a ring network where the line relaying device and an opposite device are connected in a ring by a variable-transmission-speed device-connecting line where a transmission speed varies, wherein when detecting reduction of a transmission bandwidth that is capable of transmission caused by variation in a transmission speed of the variable-transmission-speed device-connecting line preset as a TDM line transfer route, the line relaying device creates a TDM line detour route allowing the amount of TDM line transmission bandwidth overflowing from the variable-transmission-speed device-connecting line to transfer by a detour via another line relaying device connected in a ring according to a degree of variation in the transmission speed.
A TDM line detour control method for setting and canceling a TDM line detour route using a ring network which is configured so that line relaying devices for relaying transmission of data through a communication line are connected in a ring by a variable-transmission-speed device-connecting line where a transmission speed varies, wherein when detecting reduction of a transmission bandwidth that is capable of transmission caused by variation in a transmission speed of the variable-transmission-speed device-connecting line preset as a TDM line transfer route, any one of the line relaying devices creates a TDM line detour route allowing the amount of TDM line transmission bandwidth overflowing from the variable-transmission-speed device-connecting line to transfer by a detour via another line relaying device connected in a ring according to a degree of variation in the transmission speed.
Dependencies are inferred from the claim text.