Matsushita Electric Industrial Co., Ltd.

Takayuki Hamaki

Takako Hirose

Jun Yamaguchi

Satoshi Hashimoto

Hiroaki Iwamoto

Hidetaka Ohto

Takahiro Watanabe

Seiji Horii

Takuya Kobayashi

Masahide Morozumi

Akinori Tatsumi

Mikio Shimazu

Yasunori Tanaka

Mitsuhiro Suzuki

Provided is a device cooperation service system which dynamically collects information relating to a device cooperation service and includes a service discovery method for enabling an electronic device to be identified and enabling an application to be downloaded. The system of the present invention has a function of discovering an electronic device which can execute a cooperation service and has a function of specifying a service executable by a combination of an own electronic device and other electronic devices having been discovered. Using these functions, the combination of the electronic devices which can execute the cooperation service is found, and each of the electronic devices is caused to download an application necessary for executing the service.

Device cooperation service system and electronic devices included in the system

In order to detect a base station for a call connect or handover in almost real time while a mobile communication apparatus is moving, the measured base station selecting unit 110 refers to the measured base station table 101 and selects a next base station to be measured. The measuring unit 111 measures the signal quality for the selected base station. The measuring result judging unit 112 compares the measured signal quality with a predetermined threshold and judges whether the measurement of the signal quality of the present base station should be continued or whether a switch to measuring a next base station should be performed. The periphery base station table updating unit 113 rearranges the content of the periphery base station table 102 in descending order of signal quality, based on the information stored in the periphery base station table 102 and on the averages of the signal quality measurements.

Mobile communication apparatus with improved base station monitoring

A communication apparatus is provided for transmitting and receiving a plurality types of data with a TDM slot, changing the type of the data by switching a mode. The communication apparatus includes mode switching unit 101 and data dividing unit 102. The mode switching unit 101 judges whether a length of the second data is less than a predetermined value when it detects a necessity for transmitting the second data during a transmission of the first data. If less, mode switching unit 101 inserts a non-acknowledgement-type mode switch directive in the time slot data and transmits the time slot data by an interrupt. The data dividing unit 102 identifies the second data included in the received time slot data if it is judged that the received time slot data includes the non-acknowledgement-type mode switch directive, and processes the data according to the identification.

Communication apparatus for transmitting/receiving different types of

The caller personal station of the present invention includes the following units: a channel search unit for scanning the plurality of communication channels to search for an unoccupied channel and regarding the unoccupied channel as a multicast channel; and a simultaneous call unit for repeatedly transmitting a simultaneous call frame on the multicast channel for a first predetermined time period, the simultaneous call frame indicating a simultaneous call to the other personal stations; a multicast unit for transmitting multicast frames on the multicast channel when a second predetermined time period has passed, the multicast frames containing data to be multicast. On receiving the simultaneous call frame by sequentially sensing the plurality of communication channels, the other personal stations enter a receiving state of multicast frames on the multicast channel. The simultaneous call unit includes the following units: a simultaneous call frame generation unit for generating the simultaneous call frame; a transmission timer for counting the first predetermined time period and generating a time-out; and a simultaneous call frame transmission unit for repeatedly transmitting the simultaneous call frame on the multicast channel from a start of counting the predetermined time period until the time-out is generated.

Caller personal station equipped with simultaneous call function and

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Hirakata, Japan

Takayuki Hamaki