摘要:
The invention has the object of avoiding congestion while reducing differences between parameters for communication among vehicles. The vehicle-mounted device performing communication by radio signals with predetermined vehicle-mounted devices respectively equipped in a plurality of vehicles includes: a radio unit detecting radio signals to measure congestion level; a processor receiving, from each of the predetermined vehicle-mounted devices, a value of, among parameters relating to communication of the predetermined vehicle-mounted devices, a predetermined parameter for which the degree of contribution to congestion increases with increase in the value of the predetermined parameter; and a controller decreasing, when the congestion level measured by the radio unit exceeds a predetermined threshold value, the value of the predetermined parameter of its own device if the value of the predetermined parameter of its own device is greater than the average of the values of the predetermined parameter received at the processor.
摘要:
An aspect of the invention is directed to a storage management computer for managing offloading of storage workload between a storage controller of a storage system and one or more host computers. The storage management computer comprises: a memory; and a controller operable to request a virtual machine management computer to register the storage controller as a host computer, and to send, to the virtual machine management computer, storage processes information of storage processes in the storage system which can be offloaded as virtual machines in order for the virtual machine management computer to register the storage processes as virtual machines.
摘要:
An onboard apparatus according to the present invention is an onboard apparatus which is installed in each of a plurality of vehicles so as to perform communication between vehicles and communication with a wireless station, comprising: a receiver that receives from neighboring onboard apparatuses, surround information that indicates the presence of onboard apparatuses in a communication area communicable with the wireless station; and, a processor that, upon receiving communication data, transmits the communication data addressed to the wireless station in accordance with the surround information.
摘要:
The invention has the object of avoiding congestion while reducing differences between parameters for communication among vehicles. The vehicle-mounted device performing communication by radio signals with predetermined vehicle-mounted devices respectively equipped in a plurality of vehicles includes: a radio unit detecting radio signals to measure congestion level; a processor receiving, from each of the predetermined vehicle-mounted devices, a value of, among parameters relating to communication of the predetermined vehicle-mounted devices, a predetermined parameter for which the degree of contribution to congestion increases with increase in the value of the predetermined parameter; and a controller decreasing, when the congestion level measured by the radio unit exceeds a predetermined threshold value, the value of the predetermined parameter of its own device if the value of the predetermined parameter of its own device is greater than the average of the values of the predetermined parameter received at the processor.
摘要:
The invention has the object of avoiding congestion while reducing differences between parameters for communication among vehicles. The vehicle-mounted device performing communication by radio signals with predetermined vehicle-mounted devices respectively equipped in a plurality of vehicles includes: a radio unit detecting radio signals to measure congestion level; a processor receiving, from each of the predetermined vehicle-mounted devices, a value of, among parameters relating to communication of the predetermined vehicle-mounted devices, a predetermined parameter for which the degree of contribution to congestion increases with increase in the value of the predetermined parameter; and a controller decreasing, when the congestion level measured by the radio unit exceeds a predetermined threshold value, the value of the predetermined parameter of its own device if the value of the predetermined parameter of its own device is greater than the average of the values of the predetermined parameter received at the processor.
摘要:
A location information notifier (107) adds on usage channel information representing the communication channels that the onboard unit is using, to a location information notifying packet to be transmitted to notify the location of the onboard unit and transmits the location information notifying packet to another onboard unit that can communicate with the subject onboard unit. When the communication channels represented by the usage channel information included in the location information notifying packet transmitted from the other onboard unit are the same as the previously set two communication channels, a transmission processor (106) transmits a multi-hop packet transmitted and received by multi-hop communication, to the onboard unit.
摘要:
The first communication apparatus transmits existence confirmation request notices to the second communication apparatus, using the first frequency band and the second frequency band that is a frequency band different from the first frequency band. The second communication apparatus returns existence confirmation response notices as a response to the correctly received existence confirmation request notices of the first frequency band and the second frequency band, to the first communication apparatus, using the frequency bands corresponding to the first frequency band and the second frequency band. The first communication apparatus, after having received one or more of the existence confirmation response notices transmitted from the second communication apparatus, exchanges data with the second communication apparatus, using the frequency band that corresponds to the existence confirmation response notice transmitted through the higher frequency band among the first and second frequency bands.
摘要:
A location information notifier (107) adds on usage channel information representing the communication channels that the onboard unit is using, to a location information notifying packet to be transmitted to notify the location of the onboard unit and transmits the location information notifying packet to another onboard unit that can communicate with the subject onboard unit. When the communication channels represented by the usage channel information included in the location information notifying packet transmitted from the other onboard unit are the same as the previously set two communication channels, a transmission processor (106) transmits a multi-hop packet transmitted and received by multi-hop communication, to the onboard unit.
摘要:
A communication device capable of maintaining service quality and reducing an amount of communication simultaneously when updated information is transmitted is provided.A communication device 1 according to the present invention includes a communication unit 2 for transmitting updated broadcast information, an adjustment unit 3 for adjusting an information amount of the broadcast information at a predetermined timing with priority on a part different from the broadcast information that has already been transmitted, and a control unit 4 for transmitting the broadcast information whose information amount has been adjusted at the predetermined timing via the communication unit 2.
摘要:
A radio communication system which automatically selects a communication path having a higher speed is provided when a plurality of communication paths having a different speed from each other are available for data transmission between the radio terminal and the base station control equipment. The radio terminal receives a data frame and sends back an ACK signal for the data frame via the communication path through which the data frame has been received. At this time, the radio terminal acquires data of the frame with a sequence number having received at the first time, and if the frame with the same sequence number is received later, the frame is discarded. However, the ACK signal is sent back in respective cases. The base station control equipment transmits a first data frame to the radio terminal via the plurality of communication paths and transmits subsequent data frames to the radio terminal via one communication path through which the ACK signal for the first data frame has arrived the earliest.