Method for managing power supply to a cellular radiotelephone station

• US 6,748,245 B1
• Filed: 05/18/2000
• Issued: 06/08/2004
• Est. Priority Date: 09/26/1997
• Status: Expired due to Fees

• Current Assignee: Sagem Communications (Safran SA)
• Original Assignee: Sagem SA (Safran SA)
• Inventors: Heurtaux, Frédéric, Thierry, Jean-Paul, Dimech, Jean-Marc, Porato, Marc
• Primary Examiner(s): Maung, Nay
• Assistant Examiner(s): NGUYEN, TU X
• Application Number:
  US09/508,449
• Time in Patent Office: 1,482 Days
• Field of Search: 455/572, 455/573, 455/574, 455/127, 455/522, 455/69, 455/127.1, 455/115.3, 455/115.4
• US Class Current: 455/572
• CPC Class Codes: H03G 3/20 Automatic control H03G3/005 takes precedence; combined with volume compression or expansion H03G7/00
• CPC Class Codes: H04W 52/28 using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
• CPC Class Codes: H04W 52/36 with a discrete range or set of values, e.g. step size, ramping or offsets

Abstract

The process for controlling the power supply (16) of a telephone (1) of a cellular radiotelephone network (2), of which the transmission power (13) is controlled (14) by the network (2) according to a power class indicated by the telephone (1), consists of

determining the charge level of the power supply (16),

deducing the maximum transmission power able to be reached, according to the charge level,

comparing the maximum transmission power and the transmission power controlled (14) by the network (2), and

downgrading the mobile telephone (1) if the former is lower than the latter (14).

Claims

1. Process for controlling the power supply (16) of a mobile telephone (1) of a cellular radiotelephone network (2), of which the transmission power (13) is controlled (14) by the network (2) according to a power class indicated by the telephone (1), the process being characterised in that

the charge level of the power supply (16) is determined,

the maximum transmission power able to be reached is deduced from the charge level,

the maximum transmission power and the transmission power controlled (14) by the network (2) are compared, and

the mobile telephone (1) is downgraded if the former is lower than the latter (14).

2. Process according to claim 1, wherein in order to be downgraded, the telephone (1) rejects the power command of the network.

3. Process according to claim 1, wherein the telephone (1) is downgraded into a fictitious class of transmission power lower than that of the nominal class.

4. Process according to claim 3, wherein any connection between the telephone (1) and the network (2) is cut in order then to reestablish such a connection and transmit the indication relating to the fictitious class.

5. Process according to claim 4, wherein the connection is cut by cutting the power supply (16) of the telephone (1).

6. Process according to claim 1, wherein the maximum transmission power is estimated according to the current output by the power supply (16).

7. Process according to claim 2, wherein the maximum transmission power is estimated according to the current output by the power supply (16).

8. Processing according to 3, wherein the maximum transmission power is estimated according to the current output by the power supply (16).

9. Process according to claim 4, wherein the maximum transmission power is estimated according to the current output by the power supply (16).

10. Process according to claim 5 wherein the maximum transmission power is estimated according to the current output by the power supply (16).