Canon Kabushiki Kaisha

Akane Yokota

Tadashi Eguchi

Takahiro Hachisu

Koichi Egara

Akihiro Koyama

Kazuo Moritomo

Akira Torisawa

Hidetada Nago

Norihiro Mochizuki

If a network having the same SSID as but a different BSSID from those of a network that has been established by a first communication apparatus is detected, the network established by the first communication apparatus is terminated and the first communication apparatus participates in the detected network. This makes it possible for the first communication apparatus and another communication apparatus to participate in the same network.

Communication apparatus, method and system

There is provided an image output apparatus characterized by comprising: first communication control means for controlling communication using a first protocol; second communication control means for controlling communication relating to an image using a second protocol; image output means for executing image output processing based on an image supplied under the communication control by the second communication control means; and link control means for performing control relating to disconnection of the communication by each of the first communication control means and the second communication control means. When disconnection of the communication by the first communication control means is detected, the link control means holds disconnection processing of the communication by the second communication control means based on a state of the communication control relating to the image by the second communication control means.

Image output apparatus, control method, and computer-readable storage medium for providing an output operation regardless of a connection state between apparatuses

In a communication system including a plurality of image supply apparatuses and an image output apparatus, If communication with a first image supply apparatus using a first protocol is disconnected before completion of output processing of an image supplied from the first image supply apparatus under communication control by a second communication control unit which controls communication relating to an image using a second protocol, and a second image supply apparatus requests a connection, the image output apparatus establishes a connection of communication with the second image supply apparatus using the first protocol and holds a connection to the second image supply apparatus using the second protocol until the completion of the output processing of the image.

Communication system, image output apparatus, communication processing method thereof, and computer-readable storage medium

In an ad hoc mode based on IEEE802.11 standard, when a wireless terminal performs a power save operation to create a network, and a network identifier identical to that of the network to be created is present, the wireless terminal does not join the network. When the wireless terminal is to join the network, and the network identifier identical to that of the network which the wireless terminal is to join is not present, the wireless terminal does not join any network. In this method, reliable connectivity can be obtained in the ad hoc mode which is not defined in the IEEE802.11 standard in detail.

Communication system, communication apparatus, and communication method

Image output apparatus, control method, and computer-readable storage medium for connection or disconnection processing

When it is determined that a power mode is a power save mode, and that a MAC address in a received beacon matches the MAC address of a wireless communication apparatus which newly joins a wireless network, the power mode of all the communication apparatuses which have joined the wireless network is switched from the power save mode to a normal power mode.

Communication apparatus, control method, and program therefor

Communication system, communication apparatus and communication method

Disclosed are a communication device and a method of controlling the same, whereby it is possible to change the device name independently in such a manner that a plurality of communication devices having the same name will not exist on the same wireless communication network. The communication device queries another device with regard to its name and determines whether its own name and the name of the other device are the same. If the two names are the same, the querying communication device generates a name different from that of the other device using, e.g., its own wireless communication address, thereby changing its name. As a result, even if new devices are added to the network, the querying communication device automatically assigns to itself a name that is always different from those of these other devices.

Communication device selecting its own unique name by comparing with other names from other communication devices on a network

An image capturing device generates a picture handle for designating a picture file and transmits the picture handle to a picture display device. When an alias corresponding to the picture handle is recorded in a file in a storage medium, the image capturing device transmits the alias. The picture display device displays the received picture handle. By using the picture display device, a user selects a picture handle included in a list and inputs an alias corresponding to the selected picture handle. The input alias is transmitted from the picture display device and is recorded in a file in a storage medium loaded into the image capturing device.

Picture storage device

In a communication system having a plurality of communication apparatuses, an arbitrary number of communication apparatuses form a group, and group identification information for group communication is assigned to the group. Communication is performed in this group by using the assigned group identification information.

Communication system in which arbitrary number of communication apparatuses form group to communicate with each other, and the communication apparatus

A surface acoustic wave converter for converting an electric signal into a surface acoustic wave includes an interdigital transducer provided on a piezoelectric substrate. The interdigital transducer has first and second electrode groups each having one or more electrode fingers to which a first signal is almost simultaneously inputted. The surface acoustic wave converters includes first input unit for inputting the first signal to the one or more electrode fingers of the first electrode group, and second input unit for inputting the first signal to the one or more electrode fingers of the second electrode group when at least one of surface acoustic waves excited by the first signal in the one or more electrode fingers of the first electrode group reaches one of the one or more electrode fingers of the second electrode group.

Surface acoustic wave converter with improved frequency characteristics,

In a surface acoustic wave apparatus, a surface acoustic wave element for obtaining a convolution signal is housed in a recess of a substrate. Since the surface acoustic wave element is housed in the recess of the substrate in this surface acoustic wave apparatus, the apparatus can be compactified. This effect of compactification is remarkable, because the surface acoustic wave element has an output electrode for obtaining the convolution signal and thus originally has a big element size. When a laminate substrate is used as the substrate, a configuration for effectively using surfaces of respective layers may be arranged in such a manner that output wiring of the convolution signal is separately formed in the layers. This further enhances the effect of compactification. There are further disclosed a spread spectrum signal receiver using the above surface acoustic wave apparatus for receiving a spread spectrum signal, and a spread spectrum communication system using the spread spectrum signal receiver.

Compact surface acoustic wave apparatus, spread spectrum signal receiver

A matched filter has an input IDT and an output IDT, and also has a device for preventing propagating surface acoustic waves from diverging. By preventing the divergence of surface acoustic waves, signals obtained in units of electrode finger pairs of the output IDT are uniformed. Furthermore, this application also discloses the following arrangement. That is, an arrangement for converging surface acoustic waves is adopted, and the width of surface acoustic waves input to the output IDT is set to be larger than at least the crossing width of electrode fingers, nearest to the input IDT, of those of the output IDT, so that some surface acoustic waves propagate along non-crossing portions of the electrode fingers, on the input IDT side, of those of the output IDT. With this arrangement, the influence of the crossing portions of the electrode fingers, closer to the input IDT, on the surface acoustic waves input to the crossing portions of the electrode fingers, farther from the input IDT, can be relaxed.

Growing community of inventors

Kawasaki, Japan

Akane Yokota