Data communication system capable of adjusting transmission speeds

• US 20060168310A1
• Filed: 03/11/2005
• Published: 07/27/2006
• Est. Priority Date: 12/03/2004
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Koyanagi, Kenichiro, Murakami, Norio
• Granted Patent: US 8,386,635 B2
• Time in Patent Office: Days
• US Class Current: 709/233
• CPC Class Codes: H04L 47/30 in combination with information about buffer occupancy at either end or at transit nodes
• CPC Class Codes: H04L 67/06 specially adapted for file transfer, e.g. file transfer protocol [FTP]
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]

Abstract

A communication system is disclosed, including: a network in which the transmission speeds of a upstream channel and a downstream channel for transmitting data can be changed independently; a data storage server connected to the network, the data storage server configured to store data uploaded thereto via the network; and a communication terminal connected to the network, the communication terminal configured to upload old data stored therein to the data storage server via the network thereby to move the old data to the data storage server, and download new data via the network thereby to store the new data therein. The communication terminal is further configured to request the network to change at least one of the transmission speeds of the upstream channel and the downstream channel based on remaining memory capacity thereof and the transmission speeds such that there remains memory capacity available for the new data.

Claims

1. A communication system, comprising:

a network in which the transmission speeds of a upstream channel and a downstream channel for transmitting data can be changed independently;

a data storage server connected to said network, said data storage server configured to store data uploaded thereto via said network; and

a communication terminal connected to said network, said communication terminal configured to upload old data stored therein to said data storage server via said network thereby to move the old data to said data storage server, and download new data via said network thereby to store the new data therein,

wherein

said communication terminal is further configured to request said network to change at least one of the transmission speeds of the upstream channel and the downstream channel based on remaining memory capacity thereof and the transmission speeds such that there remains memory capacity available for the new data.

2. The data communication system as claimed in claim 1, wherein said communication terminal is further configured to determine at least one of the transmission speeds of the upstream channel and the downstream channel based on the remaining memory capacity thereof and the transmission speeds, and requests said network to use the determined at least one of the transmission speeds.

3. The data communication system as claimed in claim 1, wherein said communication terminal is informed of the amount of the new data to be downloaded thereto, and is further configured to request said network to change at least one of the transmission speeds based on the remaining memory capacity thereof, the informed amount of the new data, and the transmission speeds.

4. The data communication system as claimed in claim 1, wherein said communication terminal is informed of the amount of the new data to be downloaded thereto, and is further configured to determine at least one of the transmission speeds of the upstream channel and the downstream channel and requests said network to use the determined at least one of the transmission speeds based on the remaining memory capacity thereof, the informed amount of the new data, and the transmission speeds.

5. A communication terminal, comprising:

a transceiver configured to download and upload data via a network;

a memory configured to store data downloaded via said transceiver;

a memory capacity check unit configured to check the memory capacity of said memory;

a transmission speed management unit configured to manage the memory capacity of said memory checked by said memory capacity check unit and the transmission speeds of a upstream channel and a downstream channel; and

a control unit configured to determine whether to change at least one of the transmission speeds of the upstream channel and the downstream channel, and request the network to change at least one of the transmission speeds if a determination to change the at least one of the transmission speeds is made such that there remains memory capacity in said memory available for the new data.

6. The communication terminal as claimed in claim 5, wherein

said transmission speed management unit comprises a management table containing the remaining memory capacity of said memory, a current transmission speed, and a new transmission speed to be requested to the network;

and

said control unit is further configured to make the determination and the request based on the management table.

7. The communication terminal as claimed in claim 5 wherein

said transmission speed management unit comprises a management table containing the memory capacity of said memory, a current transmission speed, and a new transmission speed to be requested to the network;

and

said control unit is further configured to make the determination and the request based on the management table and the amount of data to be downloaded from the network.