Open-loop power control enhancement for blind rescue channel operation

• US 20060046767A1
• Filed: 10/25/2005
• Published: 03/02/2006
• Est. Priority Date: 01/19/2001
• Status: Abandoned Application

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Hunzinger, Jason F.
• Application Number:
  US11/259,602
• Publication Number:
  US 20060046767A1
• Time in Patent Office: Days
• US Class Current: 455/522
• CPC Class Codes: H04W 52/10 Open loop power control
• CPC Class Codes: H04W 52/225 Calculation of statistics, e.g. average, variance
• CPC Class Codes: H04W 52/228 using past power values or information
• CPC Class Codes: H04W 52/44 in connection with interruption of transmission

Abstract

A method and apparatus for determining an efficient and reliable power level for the MS'"'"'s transmitter for reverse link communications during a rescue procedure to rescue dropped calls quickly and with a high success rate is disclosed. A mobile station'"'"'s mean rescue transmission output power level is computed by first determining the mobile station'"'"'s mean receive input power level when the mobile station transmits during a connection rescue procedure. This mean receive input power level is then adjusted using up to four parameters. These four variables include (1) a pre-rescue power delta, (2) a rescue interference delta, (3) a rescue delay compensation value, and (4) a pre-determined value.

Claims

1-38. -38. (canceled)

39. IN a system comprising a network and at least one mobile station (MS) for enabling communications with the at least one MS, the at least one MS, the at least one MS having a connection with the network that is capable of becoming a potentially failing connection, a method for computing a rescue transmission output power level of a MS having a potentially failing connection for a rescue attempt, the method comprising:

storing a last closed loop power level that is determined at a time closed loop power control bits were received by the MS prior to detection of the potentially failing connection;

detecting the potentially failing connection of the MS;

determining a delta power value for the rescue attempt;

computing the rescue transmission output power level based on the delta power value for the rescue attempt and the last closed loop power level; and

performing the call rescue attempt with the rescue transmission output power level computed based on the delta power value for the rescue attempt and the closed loop power level.

40. The method of claim 39, wherein the delta power value is transmitted by the network to the MS in a message prior to rescue.