WIRELESS ACCESS DEVICE AND WIRELESS ACCESS SYSTEM

• US 20150281361A1
• Filed: 06/15/2015
• Published: 10/01/2015
• Est. Priority Date: 02/20/2013
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Inventors: MAEDA, Takuji, TOYAMA, Masayuki
• Granted Patent: US 9,762,671 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 16/10 File systems; File servers
• CPC Class Codes: H04B 7/24 for communication between two or more posts wireless communication networks H04W
• CPC Class Codes: H04L 67/06 specially adapted for file transfer, e.g. file transfer protocol [FTP]
• CPC Class Codes: H04L 67/1097 for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
• CPC Class Codes: H04L 67/12 specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks

Abstract

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.

Claims

1. A wireless access device which copies data between a file in a file system constructed on a first non-volatile memory and a file in a file system constructed on a second non-volatile memory in another wireless access device wirelessly connected to the wireless access devise, the wireless access device comprising:

a file copy controller which identifies a logical address of a transfer source and a logical address of a transfer destination based on first file system management information read from the file system constructed on the first non-volatile memory and second file system management information read from the file system constructed on the second non-volatile memory, and generates a FS (File System) transfer list which lists the logical addresses together with a transfer data size; and

a non-volatile memory controller which controls the first non-volatile memory,

wherein

the file copy controller inputs the FS transfer list to the first non-volatile memory controller, and

the non-volatile memory controller copies data between the first non-volatile memory and the second non-volatile memory based on the FS transfer list.

2. The wireless access device according to claim 1, wherein, when copying, the non-volatile memory controller

generates an access command for accessing the first non-volatile memory and accesses the first non-volatile memory, and

generates another access command for accessing the second non-volatile memory, further converts the another access command into a wireless packet, wirelessly transmits the wireless packet to the another wireless access device, and accesses the second non-volatile memory.

3. The wireless access device according to claim 1, wherein, after wirelessly transmitting the another access command to the another wireless access device, the non-volatile memory controller wirelessly receives a result, obtained by performing the another access command, in a wireless communication packet from the another wireless access device.

4. The wireless access device according to claim 1, wherein, for a data storage region of a transfer source file and a data storage region of a transfer destination file, the file copy controller

calculates a length of one continuous region included in the data storage region of the transfer source file and a length of one continuous empty region in which data of the transfer destination file is stored based on the first file system management information and the second file system management information, compares the length of the continuous region and the length of the continuous empty region, and generates the FS transfer list using a smaller length as a copy operation unit.

5. The wireless access device according to claim 1, wherein, for a data storage region of a transfer source file and a data storage region of a transfer destination file, the file copy controller

calculates a length of one continuous region included in the data storage region of the transfer source file and one or more continuous empty regions, a total length of the continuous empty regions is the same as the length of the continuous region, based on the first file system management information and the second file system management information, and generates the FS transfer list using one length among lengths of the continuous empty regions as a copy operation unit.

6. The wireless access device according to claim 1, wherein, for a data storage region of a transfer source file and a data storage region of a transfer destination file, the file copy controller

calculates a length of one continuous empty region as a region in which data of the transfer destination file is stored and one or more continuous regions, a total length of the continuous regions is the same as the length of the continuous empty region, based on the first file system management information and the second file system management information, and generates the FS transfer list using one length among lengths of the continuous regions as a copy operation unit.

7. A wireless access device which copies data between a file in a file system constructed on a first non-volatile memory in a wireless information recording device and a file in a file system constructed on a second non-volatile memory in another wireless information recording device wirelessly connected to the wireless information recording device, the wireless access device comprising:

a file copy controller which identifies a logical address of a transfer source and a logical address of a transfer destination based on first file system management information read from the file system constructed on the first non-volatile memory and second file system management information read from the file system constructed on the second non-volatile memory, and generates a FS transfer list tabulated with the logical addresses together with a transfer data size,

wherein the file copy controller copies data between the first non-volatile memory and the second non-volatile memory by inputting the FS transfer list to the wireless information recording device.

8. A wireless access device which copies data between a file in a file system constructed on a first non-volatile memory in a wireless information recording device and a file in a file system constructed on a second non-volatile memory in wirelessly connected another wireless information recording device, the wireless access device comprising:

a first non-volatile memory controller which controls the first non-volatile memory,

wherein

the wireless access device generates a FS transfer list including information of a data transfer source region and information of a data transfer destination region on a logical address space between the first non-volatile memory and the second non-volatile memory, and

the first non-volatile memory controller copies data between the first non-volatile memory and the second non-volatile memory based on the FS transfer list.

9. A wireless access system which copies data between a file in a file system constructed on a first non-volatile memory in a first wireless access device and a file in a file system constructed on a second non-volatile memory in a second wireless access device wirelessly connected to the first wireless access device,

wherein

the first wireless access device includes

a file copy controller which identifies a logical address of a transfer source and a logical address of a transfer destination based on first file system management information read from the file system constructed on the first non-volatile memory and second file system management information read from the file system constructed on the second non-volatile memory, and generates a FS transfer list tabulated with the logical addresses together with a transfer data size, and

a first non-volatile memory controller which controls the first non-volatile memory,

the file copy controller inputs the FS transfer list to the first non-volatile memory controller, and

the first non-volatile memory controller copies data between the first non-volatile memory and the second non-volatile memory based on the FS transfer list.