COMMUNICATION TERMINAL, COMMUNICATION SYSTEM AND COMMUNICATION METHOD

• US 20120320744A1
• Filed: 02/07/2011
• Published: 12/20/2012
• Est. Priority Date: 03/10/2010
• Status: Active Grant

• Current Assignee: Lenovo Innovations Ltd Hong Kong (Lenovo Group Ltd.)
• Original Assignee: NEC Corporation
• Inventors: Furuya, Tomoki
• Granted Patent: US 9,313,728 B2
• Time in Patent Office: Days
• US Class Current: 370/230
• CPC Class Codes: H04L 69/04 Protocols for data compression, e.g. ROHC
• CPC Class Codes: H04W 4/18 Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals
• CPC Class Codes: H04W 48/18 Selecting a network or a communication service
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A communication terminal is used in a wireless communication environment which involves a plurality of coexisting communication processes with upper limit values being set respectively therein for amounts of data to be transmitted. The communication terminal includes a compressor which compresses data to be transmitted, and a compression controller which controls the compressor to compress the data if the amount of the data to be transmitted is equal to or greater than the upper limit value set depending on one of the communication processes which is to be used to transmit the data.

Claims

1. A communication terminal for use in a wireless communication environment which involves a plurality of coexisting communication processes with upper limit values being set respectively therein for amounts of data to be transmitted, comprising:

a compressor which compresses data to be transmitted; and

a compression controller which controls said compressor to compress said data if the amount of the data to be transmitted is equal to or greater than the upper limit value set depending on one of the communication processes which is to be used to transmit the data.

2. The communication terminal according to claim 1, further comprising:

a base station switching controller which, if the amount of the data to be transmitted is equal to or greater than the upper limit value set depending on one of the communication processes which is to be used to transmit the data, searches for a base station that uses one of the communication processes which has a greater transmission capacity per unit time than a base station with which the communication terminal is currently communicating, and which, if the base station is detected, switches to the detected base station for transmitting the data;

wherein, if the amount of the data to be transmitted is equal to or greater than the upper limit value set depending on one of the communication processes which is to be used to communicate with the detected base station, said compression controller controls said compressor to compress said data.

3. The communication terminal according to claim 2, wherein said communication processes include an LTE process.

4. The communication terminal according to claim 2, wherein said compressor compresses said data according to a lossy data compression process.

5. A communication system having a wireless communication environment which involves a plurality of coexisting communication processes with upper limit values being set respectively therein for amounts of data to be transmitted, wherein

if an amount of data to be transmitted by a terminal is equal to or greater than an upper limit value set depending on one of the communication processes which is to be used to transmit the data, the terminal searches for a base station that uses one of the communication processes which has a greater transmission capacity per unit time than a base station with which the terminal is currently communicating, and, if the base station is detected, the terminal switches to the detected base station for transmitting the data;

and

if the amount of the data to be transmitted is equal to or greater than the upper limit value set depending on one of the communication processes which is to be used to communicate with the detected base station, the terminal compresses said data and transmits the compressed data.

6. The communication system according to claim 5, wherein said communication processes include an LTE process.

7. The communication system according to claim 5, wherein said data are compressed according to a lossy data compression process.

8. A communication method to be carried out by a communication terminal for use in a wireless communication environment which involves a plurality of coexisting communication processes with upper limit values being set respectively therein for amounts of data to be transmitted, comprising:

the step of judging whether or not an amount of data equal to or greater than one of said upper limit values is to be transmitted;

the step of searching for a base station that uses one of the communication processes which has a greater transmission capacity per unit time than a base station with which the communication terminal is currently communicating, if the amount of data equal to or greater than said one of the upper limit values is to be transmitted;

the step of, if the base station is detected, switching to the detected station for transmitting the data; and

the step of compressing said data and transmitting the compressed data if said amount of data is equal to or greater than the upper limit value set depending on one of the communication processes which is to be used to communicate with the detected base station.

9. The communication method according to claim 8, wherein said communication processes include an LTE process.

10. The communication method according to claim 8, wherein said data are compressed according to a lossy data compression process.