Nec Corporation

Hideyuki Muto

Hiroaki Nakajima

Satoshi Sonobe

Yoshitaka Nakao

Kentarou Kudou

Shunichi Kumagai

[Problem] The problem is to carry out the QoS control which tracks a change in a state of an outward line. [Means for solving the problem] A network repeater according to the present invention includes: a flow control means to carry out flow control for restricting inflow of a data flow which is received through an inward line; a bandwidth control means to carry out bandwidth control of controlling a bandwidth of a data flow which is received through the inward line and is sent through an outward line; and an outward line monitoring means to monitor a change in a state of the outward line. In the case that the monitored state of the outward line satisfies a specified condition which is determined in advance, either the flow control or the bandwidth control is carried out on a condition corresponding to the specified condition.

Network repeater, QoS control method and storage medium storing QoS control program

A wireless network relay apparatus includes a Layerswitch and a line control device as well as wireless/wired line terminating devices performing band limitation associated with an AMR function. It measures traffic passing through each line terminating device in inflow/outflow path directions. Upon detecting a modulation scheme changed due to an AMR function in a wireless area, it may specify a line terminating device so as to read a desired modulation scheme from a transmission source modulation scheme conversion table of the line control device based on traffic. It may change a local modulation scheme with a desired modulation scheme when a difference therebetween is above a predetermined number of stages. By tracking a modulation scheme changed for a transmission destination, it is possible to appropriately change a modulation scheme for a transmission source, thus suppressing traffic without discarding necessary data.

Wireless network relay apparatus

A radio terminal station apparatus for an SDH network wherein the synchronous network construction never breaks, even when a wired transmission line is branched. In a multiplexing quality generation circuit for multiplexing and sending out quality information of a clock, the insertion direction and insertion system to multiplex the quality information are compared with the input direction and system providing the clock in the apparatus, and, in the case of the insertion system not being the system providing the clock in the apparatus and the insertion direction being opposite to the input direction of the clock in the apparatus and when the priority degree information of the system having an input direction opposite to the insertion direction is a special value defined in advance, the same quality information as the clock in the apparatus are multiplexed and sent out.

Growing community of inventors

Tokyo, Japan

Hideyuki Muto