Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Matsushita Electric Industrial Co., Ltd.

Takuji Maeda

Shinji Inoue

Teruto Hirota

Masahiro Nakanishi

Hirokazu So

Makoto Fujiwara

Makoto Ochi

Takayuki Ito

Yusuke Nemoto

Yasushi Yamada

Junichi Yasui

Masayuki Toyama

Masato Suto

Tatsuya Adachi

Tomoaki Izumi

Tadashi Ono

Tetsushi Kasahara

Kazuaki Tamura

Isao Kato

Kiminori Matsuno

Manabu Inoue

Masahiro Nakamura

Nobuhiko Arashin

Kazuya Fujimura

Yukiko Inoue

Shouichi Tsujita

Yoshiho Gotoh

Toshiyuki Honda

Yoshikazu Katoh

Masafumi Nosaka

Hiroki Etoh

Shoichi Tsujita

Jun Ohara

Koichi Horiuchi

Kouji Miura

Shinichiro Nishioka

Katsumi Tokuda

Satoshi Senga

Hirofumi Nakagaki

Keisuke Sakai

Akira Yamasaki

Shigekazu Kogita

Hirokazu Sou

Tsutomu Mori

Katsumi Watanabe

Yukiko Okamoto

Takeshi Umemoto

Yoshinori Nakashima

A slave device continuously transmits a plurality of tuning blocks to a host device at intervals defined by a clock period between a plurality of data blocks at the time of transmitting the plurality of data blocks and by a clock period defined by a data structure of the plurality of tuning blocks.

Host device, slave device, and data transfer system

A train communication system is configured to perform wireless communication between two cars coupled to each other by using low power radio. The train communication system includes: a first device disposed on one coupling surface of two coupling surfaces facing each other between two cars; a second device disposed on the one coupling surface; a third device disposed on another coupling surface of the two coupling surfaces; and a fourth device disposed on the other coupling surface. The first device and the third device are disposed to face each other. The second device and the fourth device are disposed to face each other. When no wireless connections are established among the first device, the second device, the third device, and the fourth device, the first to fourth devices each perform at least one of switching of communication channels used for wireless communication among the first to fourth devices and switching of a master device or a slave device.

Train communication system

A first antenna group includes one first antenna disposed at one end of a leading car, and another first antenna disposed at one end of a following car. A second antenna group includes one second antenna disposed at the one end of the leading car, the position where the one second antenna is disposed being different from the position where the one first antenna is disposed in a direction orthogonal to a travel direction of the leading car, and another second antenna disposed at the one end of the following car. A measurement unit measures radio wave strength between a pair of first antennas during communication via the first antenna group. A controller is enabled to make a switch from the first antenna group to the second antenna group when the radio wave strength is less than a predetermined value.

A communication system includes a transmission terminal and a reception terminal, and the transmission terminal transmits data to the reception terminal. The transmission terminal includes a storage unit that stores data and management information of the data, and a first communication unit that performs communication using a first radio method having non-directivity and a second radio method having directivity. The reception terminal includes a second communication unit that performs communication using the first radio method having non-directivity and the second radio method having directivity, and a selector that selects the data based on the management information. The first communication unit and the second communication unit communicate with each other using the first radio method having non-directivity when selecting the data to be transmitted, and communicates with each other using the second radio method having directivity when transmitting the selected data.

Communication system, transmission terminal and reception terminal

The present disclosure provides a method of copying files at a high speed when accesses to both of a local memory physically connected to an access device and a remote memory connected via a wireless network. A file copy controller in the access device generates a FS transfer list in which logical address positions of copy sources and logical address positions of copy destinations are stored, based on file system management information of the local memory and an access list, obtained from another access device, of the remote memory, and inputs the FS transfer list to a non-volatile memory controller connected to the local memory. The non-volatile memory controller copies data between the local memory and the remote memory based on the information stored in the FS transfer list without using a CPU in the access device or an internal bus connected to the CPU.

Wireless access device and wireless access system

A cryptographic processing device comprises a cipher control circuit operative to execute at least one of encryption of plaintext data and decryption of ciphertext data on the basis of conversion parameter data; and a memory cell array that includes a plurality of memory cells, the plurality of memory cells including: a memory cell in a variable state, in which a resistance value reversibly changes between a plurality of changeable resistance value ranges in accordance with an electric signal applied thereto; and a memory cell in an initial state, which does not change to the variable state unless a forming stress for changing the memory cell in the initial state to the variable state is applied thereto, a resistance value of the memory cell in the initial state being within an initial resistance value range which does not overlap with the plurality of changeable resistance value ranges, wherein in the memory cell array, data including the conversion parameter data is stored on the basis of whether each of the plurality of memory cells is in the initial state or the variable state.

Cryptographic processing device having a non-volatile memory including memory cells in an initial or a variable state

An encryption and recording apparatus storing data, the apparatus including: a first nonvolatile memory; a second nonvolatile memory; and an encryption and decryption control unit, wherein the encryption and decryption control unit: manages an area included in the second nonvolatile memory on a per-block basis, and manages association between a block and a block-unique key using key management information stored in the first nonvolatile memory; receives the data and corresponding information associated with the data; encrypts the data, using one or more block-unique keys associated with one or more blocks included in the second nonvolatile memory and writes the data to the one or more blocks; and stores the corresponding information into the key management information, associating the corresponding information and the one or more block-unique keys.

Encryption and recording apparatus, encryption and recording system, and encryption and recording method

A recording device operates in accordance with an instruction from an access device. The recording device comprising a nonvolatile memory that stores data, a communication unit that receives an instruction issued by the access device, and a memory controller that controls the nonvolatile memory. When a recording instruction for recording data into the nonvolatile memory is received from the access device, the memory controller starts recording of data into the nonvolatile memory. When the memory controller receives from the access device a suspension instruction for suspending the recording of data, the memory controller stores suspension information into the nonvolatile memory, the suspension information indicating a suspended position as a position in a recording area of the nonvolatile memory at which the data is being recorded upon reception of the suspension instruction.

Recording device, access device, recording system, and recording method

A file copy controller in a wireless access device reads file system management information of both of a local memory and a remote memory, generates a FS transfer list in which logical address positions of copy sources and logical address positions of copy destinations are stored, and inputs the FS transfer list to a non-volatile memory controller connected to the local memory. The non-volatile memory controller performs copy operation between the local memory and the remote memory based on the information stored in the FS transfer list without using a CPU in an access device or an internal bus connected to the CPU.

A functional device can communicate with an access apparatus through wireless communication. At least one additional device can be connected to the functional device. The functional device includes an access controller that performs an initialization process of the additional device to obtain characteristic information of the additional device from the additional device, before establishing communication between the access apparatus and the functional device, a memory that stores the obtained characteristic information, a communication unit that performs transmission and reception of data with the access apparatus, and a communication controller that transmits the characteristic information stored in the memory to the access apparatus without performing an initialization process of the additional device, upon establishment of communication with the access apparatus by the communication unit.

Functional device, access system, and communication establishing method

The access device comprises a memory and a device controller configured to send and receive a data control right between the data recording device and a central controller provided in a host device. When having received a request to interrupt transfer of data from the central controller while data is being transferred from the data recording device, the device controller releases the data control right from the data recording device, and has the data recording device determine whether or not mismatching has occurred in file system management information for data stored in the memory. The device controller then returns the data control right to the data recoding device when it is determined that mismatching has occurred in the file system management information. The data recording device releases the data control right after eliminating the mismatching in the file system management information according to the returned data control right.

Access device, communication device, communication system, and data access method

A secure LSI deviceincludes an encryption sectionfor encrypting a program, and an external I/Ffor inputting/outputting a program or data from/to an external memory. In the encryption section, the operation of a private key arithmetic processing sectionis prohibited with respect to a sequence whose execution is determined by a key-generation/update sequencerto be impermissible. In the external I/F, a program processing sectionand a data processing sectionare structured independently from each other.

Semiconductor device including encryption section, semiconductor device including external interface, and content reproduction method

An information recording device comprises a memory component configured to hold data, a first file system controller configured to manage data held in the memory component on the basis of a first file name formed by a first code, and a wireless component configured to send and receive wireless signals. The first file system controller receives, from an access device connected to the information recording device, the first file name and a second file name that corresponds to the first file name and is formed by a second code that is different from the first code, identifies specific data having the first file name out of the data held in the memory component, and sends the second file name and the specific data to another information recording device connected via the wireless component.

Information recording device, information recording system, and information communication method

A method used in an access module that uses a file system to manage a nonvolatile memory of an information recording module enables an available storage space to be calculated in a short time before file data is recorded, and shortens the time required from initialization of the file system to recording. An access module () manages information about area management of the file system configured in an information recording module in units of fixed-length blocks. A divisional available storage space calculation unit () performs an available storage space calculation process in units of the fixed-length blocks, and completes preparations for recording when detecting a minimum required storage space for recording file data and enables recording of the file data. This shortens the time required from initialization of the file system to recording.

Access apparatus and available storage space calculation method

A predetermined number of erasable blocks positioned at a start of a volume area in a semiconductor memory card are provided so as to include volume management information. A user area following the volume management information includes a plurality of clusters. A size of a partition control area from a master boot record & partition table sector to a partition boot sector is determined so that the plurality of clusters in the user area are not arranged so as to straddle erasable block boundaries. Since cluster boundaries and erasable block boundaries in the user area are aligned, there is no need to perform wasteful processing in which two erasable blocks are erased to rewrite one cluster.

Semiconductor memory card access apparatus, a computer-readable recording medium, an initialization method, and a semiconductor memory card

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Osaka, Japan

Takuji Maeda