Fujitsu Corporation

Akio Ohhashi

Isamu Fukuda

Shinya Hatakeyama

Akihiro Kobayashi

Yasushi Miyagawa

Atsushi Yabe

Yasuhiro Yoshika

Yoshie Kitahara

Koichiro Higashi

Yashushi Miyagawa

Kouichirou Higashi

A wireless communication system includes an RNC and a BTS which communicates with the RNC. A congestion-notification transmitting unit of the BTS notifies the RNC of occurrence of congestion in a sector in which a mobile station is located. The RNC includes a congestion-notification receiving unit, a retransmission-ratio monitoring unit, and a transmission-rate control unit. The congestion-notification receiving unit detects the congestion occurrence by the notification from the BTS. The retransmission-ratio monitoring unit monitors a ratio of retransmission of a packet to the mobile station. The transmission-rate control unit performs control of changing a transmission rate of a packet to the mobile station according to the retransmission ratio when the congestion occurrence has been detected by the congestion-notification receiving unit.

Communication control device, wireless communication system, and wireless communication method for control of changing transmission rate of packet to mobile station

This is a method for transmitting packets. The transmission method includes measuring a time taken for feedback indicating that a packet including context information has been lost; and switching between a first mode and a second mode based on the measured time taken for the feedback, the first mode being a mode for periodically transmitting a packet including the context information and the second mode being a mode for transmitting a packet including the context information in response to the feedback indicating that a packet including the context information has been lost.

Packet transmission method and nodes

Growing community of inventors

Yokohama, Japan

Akio Ohhashi