Kddi Corporation

Yasuhiko Hiehata

Hajime Nakamura

Hideyuki Koto

Takeshi Kitahara

Satoshi Uemura

Yuji Ikeda

A control server, receives the number of user terminals U which have transited to the individual Web pages from a monitoring serverin Step S. In Step S, based on the received number of transitions U of the individual Web pages, application of control is decided by the control server. Here, based on the assumption that the number of transitions Uc to a Web page C including a transaction access or hyper link to the end serveraccurately represents the number of executed transactions, the number of transitions Uc to Web page C is compared with an upper limit value Cmax. When Uc&#x3c;Cmax, the process proceeds to Step Sand a control information is sent from the control serverto the user terminalsto cancel the application of control.

Transmission control system

A module transmits a request for line connection to a module at a communication time notified from a module. The module proceeds to line connection processing in response to the request for line connection and notifies the module of success or failure of line connection. The module notifies a log database of the notified success or failure of line connection. The log database records success or failure of line connection in a database as log data and notifies the module of the log data at predetermined time intervals. The module revises a communication time based on the log data and notifies the module of the revised communication time.

Wireless node

A throughput detectordetects a throughput R. A threshold value Rref of the throughput Rat which a network side can be presumed to be congested is stored in a threshold value storage unit. A comparatorcompares the current throughput Rwith the threshold value Rref. A release request unitrequests release of a wireless resource when the throughput Rfalls below the threshold value Rref. In response to the release request, a controllersuitably disconnects a physical layer or a logical layer of a wireless section to release the wireless resource. A release term determining unitdetermines a release term of the wireless resource. A resource request unitmakes the released wireless resource be acquired anew after the elapse of the release term to reconnect the wireless communication.

Traffic control method and apparatus for wireless communication

A communication permitted slot setting sectionrandomly and equally divides one prescribed cycle for each wireless terminal and sets some of them, respectively, as permitted slots 'p.' A communication assigning sectionassigns the total communication 'n' per one cycle pre-assigned to each wireless terminal to each permitted slot &#x201c;p.&#x201d; A communication timing determining sectionrandomly determines communication timings for each permitted slot &#x201c;p.&#x201d; A degree-of-congestion measuring sectionmeasures the degree of congestion of wireless resources. A connectivity estimating sectionestimates the connectivity M for each permitted slot. Each time a communication opportunity is consumed, a communication readjusting sectionassigns the communication opportunity to an permitted slot with a higher connectivity M at a higher probability in the next cycle.

Wireless terminal

A radio communication terminal includes a link-usage level calculating section that calculates usage level of a radio link, and a data reception continuation/suspension determining section that determines continuation of data reception or suspension of data reception according to the level of usage calculated by the link-usage level calculating section. The link-usage level calculating section calculates a current usage level indicating a level of usage of the radio link associated with current data reception in the radio communication terminal. The data reception continuation/suspension determining section determines continuation of data reception when the current usage level is equal to or higher than a reference level of usage being a threshold and determines suspension of data reception when the current usage level is lower than the reference level of usage.

Radio communication terminal

A wireless communication device is disclosed in which signal quality values C[t] of a wireless signal received by the wireless communication device is successively measured at variable time intervals &#x394;t, mean value &#x3bc; of the successively-measured signal quality values C[t] is calculated, standard deviation &#x3c3; of the successively-measured signal quality values C[t] is calculated, a determination is made as to whether the signal quality value C[t] at present time satisfies a predetermined inequality which represents that a signal quality value C[t] at arbitrary time lies within k times the standard deviations &#x3c3; away from the mean value &#x3bc;, and lengths of the time intervals &#x394;t for the measurement device are controlled based on the determination.

Growing community of inventors

Saitama, Japan

Yasuhiko Hiehata