Radio frequency power control algorithm

• US 6,615,052 B1
• Filed: 12/08/1999
• Issued: 09/02/2003
• Est. Priority Date: 12/08/1998
• Status: Expired due to Fees

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Parmenter, Kevin C.
• Primary Examiner(s): Bost, Dwayne
• Assistant Examiner(s): RAMOS FELICIANO, ELISEO
• Application Number:
  US09/457,751
• Time in Patent Office: 1,364 Days
• Field of Search: 455/522, 455/69, 455/70, 455/13.1, 455/13.4, 455/427, 455/67.1, 455/12.1, 455/428, 455/67.3, 455/226--22, 455/453, 370/318, 370/317
• US Class Current: 455/522
• CPC Class Codes: H04B 7/18543 for adaptation of transmission parameters, e.g. power control for detecting or preventing errors in the information received H04L1/00
• CPC Class Codes: H04W 52/20 using error rate
• CPC Class Codes: H04W 52/265 taking into account the quality of service QoS
• CPC Class Codes: H04W 52/267 taking into account the information rate
• CPC Class Codes: H04W 52/287 when the channel is in stand-by
• CPC Class Codes: H04W 52/288 taking into account the usage mode, e.g. hands-free, data transmission, telephone
• CPC Class Codes: H04W 52/343 taking into account loading or congestion level
• CPC Class Codes: H04W 52/346 distributing total power among users or channels
• CPC Class Codes: H04W 52/50 at the moment of starting communication in a multiple access environment
• CPC Class Codes: H04W 52/52 using AGC [Automatic Gain Control] circuits or amplifiers

Abstract

The disclosure describes a method and system for dynamically adjusting the output power level in each channel of a multichannel mobile cellular to satellite telecommunication system, the power levels of the voice and data channels being preset to appropriate initial output power levels, the initial power level for data channels being higher than the initial power level for voice channels. The method includes receiving a call request from communication equipment on one of the plurality of channels; determining whether the call is a voice call or a data call, determining whether a transmission channel is available for the call; assigning the call to an available voice or data transmission channel; looking up pre-stored power parameters for each active transmission channel; transmitting the parameters to each active transmission channel via a message; and dynamically adjusting the output power of each active transmission channel in response to the transmitted parameters.

Claims

1. A method for dynamically adjusting the output power level in each active voice and data transmission channel of a multichannel mobile cellular to satellite communication system, the power levels of the voice and data channels being preset to appropriate initial output power levels, the initial power level for data channels being higher than the initial power level for voice channels, said method comprising the steps of:

receiving a call request from communication equipment on one of the plurality of channels;

determining for said call request whether the call is a voice call or a data call;

determining whether a transmission channel is available for said call;

assigning said call to an available voice or data transmission channel;

looking up pre-stored power parameters for each active transmission channel, wherein looking up prestored output power parameters for each of said active transmission channels comprises looking up of parameters based upon a number of active data and voice transmission channels, a minimum power required for each call type based upon an allowable bit error rate, and a maximum safe output power of a high power amplifier;

transmitting said parameters to each said active transmission channel via a message; and

dynamically adjusting the output power of each said active transmission channel in response to said transmitted parameters, whereby a combined adjusted output power of the active transmission channels will not violate the integrity of the amplifier.

2. The method recited in claim 1, further comprising monitoring said communication equipment and automatically initiating a call in response to said receiving a call request.

3. The method recited in claim 1, further comprising incrementing a respective one of a voice channel counter and a data channel counter in response to said determining whether said call is a voice call or a data call.

4. The method recited in claim 1, wherein said looking up of output power parameters for each said transmission channel further comprises pre-storing output power parameters having an output power sum limited by a maximum output power of said high power amplifier amplifying signals received from said transmission channels and transmitting said amplified signals to an antenna for transmission to a satellite network for communication.

5. The method recited in claim 1, wherein said adjusting the output power of said transmission channels is a function of the number of active data and voice transmission channels.

6. The method as recited in claim 1, wherein said step of determining availability of ones of the transmission channels comprises comparing the number of currently available active transmission channels against the maximum number of transmission channels.

7. The method recited in claim 1, further comprising storing said calculated output power parameters for each active transmission channel in a memory.

8. The method recited in claim 1, wherein the total output power of all the active transmission channels is combined in a high power amplifier amplifying the transmission signals and transmitting the amplified transmission signals to an antenna for transmission to a satellite network for communication.

9. The method recited in claim 8, wherein said step of looking up output power parameters for each of the transmission channels further comprises looking up said adjusted output power parameters as functions of number of active data and voice transmission channels and a maximum safe output power of the high power amplifier.

10. A method for dynamically adjusting the output power level in each active voice and data transmission channel of a multichannel mobile cellular to satellite communication system, the power levels of the voice and data channels being preset to appropriate initial output power levels, the initial power level for data channels being higher than the initial power level for voice channels, said method comprising the steps of:

receiving a call request from communication equipment on one of the plurality of channels;

determining for said call request whether the call is a voice call or a data call,

determining whether a transmission channel is available for said call;

assigning said call to an available voice or data transmission channel;

looking up pre-stored power parameters for each active transmission channel;

transmitting said parameters to each said active transmission channel via a message; and

dynamically adjusting the output power of each said active transmission channel in response to said transmitted parameters.