Abstract: An apparatus for managing a resource includes a buffer memory; and a processor configured to store, when target data for each of processes is acquired, the acquired target data in the buffer memory, the processes occurring asynchronously and periodically and being assigned degrees of priority, and assign a shared resource to some of the processes for which the target data is stored in the buffer memory in descending order of the priority at every predetermined timing, the shared resource being usable for each of the processes.

Abstract: According to one embodiment, a storage unit, a management unit that acquires attributes of communication apparatuses from a plurality of the communication apparatuses and stores identifiers of the communication apparatuses and the attributes in the storage unit in association with each other as communication apparatus information, and a selection unit that selects a distributor apparatus that is the communication apparatus distributing a content to the other communication apparatuses as a radio signal based on the communication apparatus information are included.

Abstract: According to the embodiments, a communication apparatus stores therein an operation mode indicating whether the communication apparatus is a publisher or a subscriber, and includes a message processing unit that generates a transmission message and analyzes a reception message and a nonvolatile memory. When the communication apparatus is subscriber, the communication apparatus sends a repair message to request a retransmission of a data chunk not successively received. When the communication apparatus is publisher, the communication apparatus selectively retransmits the data chunk based on the repair message.

Abstract: A mode of a publisher or a subscriber is stored. Also, a first identifier indicating affiliation to a first group is stored. In a case of the publisher, a transmission message including ToC information, which is a list of the first identifiers and data to be transmitted, is transmitted to an outside. In a case of the subscriber, when a received message includes the first identifier, data included in the message is stored into a non-volatile memory, and when it is determined that all data in the ToC information stored in the received message are already received and that the number of publishers is less than a threshold, the stored mode is changed to the publisher.

Abstract: According to one embodiment, a memory system includes a bit-error-rate manager configured to manage information associated with a bit error rate for each physical block, a logical-block constructing unit configured to construct a logical block based on the information associated with the bit error rate, and a block manager configured to manage the correspondence between the logical block constructed by the logical-block constructing unit and the physical blocks. The logical block is a collection of a plurality of physical blocks.

Abstract: According to one embodiment, a storage unit, a management unit that acquires attributes of communication apparatuses from a plurality of the communication apparatuses and stores identifiers of the communication apparatuses and the attributes in the storage unit in association with each other as communication apparatus information, and a selection unit that selects a distributor apparatus that is the communication apparatus distributing a content to the other communication apparatuses as a radio signal based on the communication apparatus information are included.

Abstract: According to the embodiments, when a communication apparatus is a publisher, a transmission message including a first identifier is transmitted using first transmission power, when the communication apparatus is a subscriber, data of a reception message including the first identifier is stored in a nonvolatile memory, when at least a part of the reception message cannot be received, a repair message for requesting retransmission of the reception message is transmitted from a wireless interface unit using second transmission power, and when there is no response, a repair message is transmitted using third transmission power that is larger than the second transmission power.

Abstract: According to one embodiment, a virtual block is constructed according to configuration conditions that, when a plurality of physical blocks included in the virtual block are selected, the sum of the number of physical block pairs and the number of single blocks allocated from the same memory chip to one virtual block is less than or equal to a first value.

Abstract: According to one embodiment, a communication apparatus includes an operation mode storage unit configured to store whether the communication apparatus is in a mode to operate as a radio base station or a mode to operate as a terminal, and a non-volatile memory. In a case of the radio base station, a message to be transmitted is output to the outside. In a case of the terminal, data included in a received message is stored in the non-volatile memory. In a case of operating as the radio base station, the operation mode is changed from the terminal to the radio base station when communication quality with an external first radio base station is less than a predetermined value and a message from a radio base station other than the first radio base station is not received after all the data transmitted by the first radio base station have been received.

Abstract: According to an embodiment, a retention time of each block group is managed and a degree of wear of each block is managed. A free block allocated to each block group is determined based on the retention time of each block group and the degree of wear of each block.

Abstract: A mode of a publisher or a subscriber is stored. Also, a first identifier indicating affiliation to a first group is stored. In a case of the publisher, a transmission message including ToC information, which is a list of the first identifiers and data to be transmitted, is transmitted to an outside. In a case of the subscriber, when a received message includes the first identifier, data included in the message is stored into a non-volatile memory, and when it is determined that all data in the ToC information stored in the received message are already received and that the number of publishers is less than a threshold, the stored mode is changed to the publisher.

Abstract: According to one embodiment, a storage device includes an encoder, a nonvolatile memory that stores user data and a parity, a magnetic disk, and a management unit that holds correspondence between a logical address and a first physical address as first conversion information, and holds correspondence between the first physical address and a second physical address as second conversion information, with the second physical address including media information indicating a medium of a storage destination and information indicating a storage position. When the user data stored in the nonvolatile memory is to be moved to the magnetic disk, the management unit updates the second physical address of the user date in the second conversion information, to a value indicating a storage destination after the movement.

Abstract: According to an embodiment, an access controller refers to state information upon an erase operation, causes the erase operation to be performed on all the collection of physical blocks included in a first logical block, and causes the erase operation to be performed on a part of the collection of physical blocks included in a second logical block and does not causes the erase operation to be performed on rest of the collection of the physical blocks in the second logical block.

Abstract: According to the embodiments, when a communication apparatus is a publisher, a transmission message including a first identifier is transmitted using first transmission power, when the communication apparatus is a subscriber, data of a reception message including the first identifier is stored in a nonvolatile memory, when at least a part of the reception message cannot be received, a repair message for requesting retransmission of the reception message is transmitted from a wireless interface unit using second transmission power, and when there is no response, a repair message is transmitted using third transmission power that is larger than the second transmission power.

Abstract: According to the embodiments, a communication apparatus stores therein an operation mode indicating whether the communication apparatus is a publisher or a subscriber, and includes a message processing unit that generates a transmission message and analyzes a reception message and a nonvolatile memory. When the communication apparatus is subscriber, the communication apparatus sends a repair message to request a retransmission of a data chunk not successively received. When the communication apparatus is publisher, the communication apparatus selectively retransmits the data chunk based on the repair message.

Abstract: According to one embodiment, a memory system includes a bit-error-rate manager configured to manage information associated with a bit error rate for each physical block, a logical-block constructing unit configured to construct a logical block based on the information associated with the bit error rate, and a block manager configured to manage the correspondence between the logical block constructed by the logical-block constructing unit and the physical blocks. The logical block is a collection of a plurality of physical blocks.

Abstract: A storage device according to an embodiment includes first and second non-volatile semiconductor memories. In addition, the storage device includes first controller that controls the first non-volatile memory to cause the first non-volatile memory to perform processes. In addition, the storage device includes second controller that controls the second non-volatile memory to cause the second non-volatile memory to perform processes. The storage device further includes a signal line which is connected to the first controller and the second controller and through which a token is transmitted between the first controller and the second controller. The first controller is capable of controlling the first non-volatile memory while holding the token and the second controller is capable of controlling the second non-volatile memory while holding the token.

Abstract: According to one embodiment, a virtual block is constructed according to configuration conditions that, when a plurality of physical blocks included in the virtual block are selected, the sum of the number of physical block pairs and the number of single blocks allocated from the same memory chip to one virtual block is less than or equal to a first value.

Abstract: A storage device according to an embodiment includes first and second non-volatile semiconductor memories. In addition, the storage device includes first controller that controls the first non-volatile memory to cause the first non-volatile memory to perform processes. In addition, the storage device includes second controller that controls the second non-volatile memory to cause the second non-volatile memory to perform processes. The storage device further includes a signal line which is connected to the first controller and the second controller and through which a token is transmitted between the first controller and the second controller. The first controller is capable of controlling the first non-volatile memory while holding the token and the second controller is capable of controlling the second non-volatile memory while holding the token.

Abstract: According to an embodiment, a retention time of each block group is managed and a degree of wear of each block is managed. A free block allocated to each block group is determined based on the retention time of each block group and the degree of wear of each block.