Mobile communication terminal and data transmission method

• US 20010011032A1
• Filed: 01/30/2001
• Published: 08/02/2001
• Est. Priority Date: 02/02/2000
• Status: Active Grant

• Current Assignee: Lenovo Innovations Ltd Hong Kong (Lenovo Group Ltd.)
• Original Assignee: NEC Corporation
• Inventors: Suzuki, Takahiro
• Granted Patent: US 6,876,873 B2
• Time in Patent Office: Days
• US Class Current: 455/574
• CPC Class Codes: H04W 52/0277 according to available power supply, e.g. switching off when a low battery condition is detected
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The mobile communication terminal uses a battery as a power source. The mobile communication terminal includes a detector 103, a decision section 105, a transmission-reserved controller 105, 107, and a reserved data transmission controller 105, 107. The detector 103 detects the voltage of the battery acting as a power source. The decision section 105 decides a difference relationship between a voltage level detected by the detector and a prescribed value. The transmission-reserved mail controller 105, 107 stores transmission data as transmission-reserved data into a storage, without starting the transmission operation, when the decision section decides that the detected voltage level is less than the prescribed value, in response to a data transmission request and then maintains its wait state. The reserved data transmission controller 105, 107 radio-transmits the transmission-reserved data to be stored in the storage when the decision section decides that the detected voltage level exceeds the prescribed value after maintenance of the wait state.

Claims

1. A mobile communication terminal, wherein a battery is used as a power source, comprising:

a detector for detecting the voltage of the battery acting as a power source;

decision means for deciding a difference relationship between a voltage level detected by the detector and a prescribed value;

a transmission reservation controller for storing transmission data as transmission-reserved data into a storage, without starting the transmission operation, when the decision means decides that the detected voltage level is less than the prescribed value, in response to a data transmission request, and thus maintaining its wait state; and

a reserved-data transmission controller for radio-transmitting the transmission-reserved data to be stored in the storage when the decision means decides that the detected voltage level exceeds said prescribed value after maintenance of the wait state.

2. The mobile communication terminal defined in

claim 1

, wherein the transmission data comprises electronic mail data created in the wait state.

3. The mobile communication terminal defined in

claim 2

, further comprising an electronic mail data storage for temporarily storing the created electronic mail data in the storage to wait decision results by the decision means in advance of transmission.

4. A mobile communication terminal, wherein a battery is used as a power source, comprising:

a detector for detecting the voltage of the battery acting as a power source;

decision means for deciding a difference relationship between a voltage level detected by the detector and a prescribed value;

a transmission reservation controller for ceasing the transmission operation, when the decision means decides that the detected voltage level is less than the prescribed value, during radio transmission of transmission data, storing the transmission data as transmission-reserved data into a storage, and then changing the mobile communication terminal to a wait state; and

a re-transmission controller for radio-transmitting again the transmission-reserved data to be stored in the storage when the decision means decides that the detected voltage level exceeds the prescribed value after a change to the wait state.

5. The mobile communication terminal defined in

claim 4

, wherein the transmission data comprises electronic mail data created in the wait state.

6. The mobile communication terminal defined in

claim 5

, further comprising an electronic mail data storage for temporarily storing the created electronic mail data in said storage to wait decision results by the decision means in advance of transmission.

7. A data transmission method suitable for a mobile communication terminal which uses a battery as a power source, comprising the steps of:

detecting the voltage of the battery acting as a power source;

deciding a difference relationship between a voltage level detected in the detecting step and a prescribed value;

storing transmission data as transmission-reserved data into a storage, without starting the transmission operation, when it is decided in the deciding step that the detected voltage level is less than the prescribed value, in response to a data transmission request, and then maintaining its wait state; and

radio-transmitting the transmission-reserved data to be stored in the storage when it is decided in the deciding step that the detected voltage level exceeds the prescribed value after maintenance of the wait state.

8. The data transmission method defined in

claim 7

, further comprising the step of charging said battery after maintenance of the wait state.

9. The data transmission method defined in

claim 7

, further comprising the step of replacing said battery for a new one after maintenance of the wait state.

10. The data transmission method defined in aims 7, further comprising the step of creating electronic mail data as said transmission data in the wait state.

11. The data transmission method defined in

claim 10

, further comprising the step of temporarily storing said created electronic mail data into the storage to wait decision results in the deciding step in advance of transmission.

12. A data transmission method suitable for a mobile communication terminal which uses a battery acting as a power source, comprising the steps of:

detecting the voltage of the battery acting as a power source;

deciding a difference relationship between a voltage level detected by the detector and a prescribed value;

ceasing the transmission operation when it is decided in the detecting step that the detected voltage level is less than the prescribed value, during radio transmission of transmission data, storing the transmission data as transmission-reserved data into a storage, and thus changing the mobile communication terminal to a wait state; and

radio-transmitting again the transmission-reserved data to be stored in the storage when it is decided in the deciding step that the detected voltage level exceeds the prescribed value after a change to the wait state.

13. The data transmission method defined in

claim 12

, further comprising the step of charging said battery after a change to said wait state.

14. The data transmission method defined in

claim 12

, further comprising the step of replacing said battery for a new one after a change to said wait state.

15. The data transmission method defined in claims 12, further comprising the step of creating electronic mail data as said transmission data in the wait state.

16. The data transmission method defined in

claim 15

, further comprising the step of temporarily storing said created electronic mail data into the storage to wait decision results in the deciding step in advance of transmission.