Fujitsu Corporation

Teruhiko Onishi

Ikuo Takekawa

Masahiro Kataoka

Satoru Chikuma

Takeshi Saito

Hiroshi Masago

Morihisa Kawai

A decompression apparatus includes a memory configured to store a dictionary data including, in association with a compression code, a decompression symbol and address information indicating a position of flag information, which indicates whether the decompressed symbol is included in a block of decompressed data obtained by decompressing a block of compressed data or not, and a processor configured to execute a procedure, the procedure including accessing the dictionary data stored in the memory, obtaining, from the dictionary data, the decompressed symbol and the address information associated with the compressed symbol included in the block of compressed data, generating the decompressed data by using the obtained decompressed symbol, and updating the flag information stored at the position indicated by the obtained address information.

Decompression apparatus and decompression method

Upon receipt of a request to connect to an ad-hoc network from an external communication node, an address assigning unit obtains information on an IP address assigned to the external communication node. The address assigning unit determines whether the IP address is already used by any of communication nodes that are connected to the ad-hoc network based on network management information stored in a storage unit. The address assigning unit generates a new IP address that is used none of the communication nodes when the IP address is already used, and transmits the new IP address to the external communication node. The external communication node is assigned the new IP address, and connects to the ad-hoc network.

Address assignment apparatus, address assignment method, and computer product

A data compression program making a computer perform processing which enables compression of only highly compressible data. First, a transmitter-side device performs compression processing of a portion of data to be compressed. Next, the transmitter-side device compares volumes of the portion of the data before and after the compression processing, and determines whether or not the compression processing is effective. When the data to be compressed is uncompressed data, the volume of the portion of the data is reduced by the compression processing. On the other hand, when the data to be compressed is compressed data, the volume of the portion of the data is not reduced by the compression processing. Therefore, only when it is determined that the compression processing is effective, the transmitter-side device compresses the other portions of the data to be compressed.

Growing community of inventors

Kawasaki, Japan

Teruhiko Onishi