Method and apparatus for performing inter-system searches in idle mode

A method for wireless communication, comprising:

• determining received signal level for a first radio access technology (RAT);
• determining received signal level for a second RAT;
• determining a difference between the received signal level for the first RAT and the received signal level for the second RAT;
• and
• determining a rate of searches for the second RAT based on the difference between the received signal levels for the first and second RATs, the rate identifying a repetition period for performing the searches;
• wherein the determining the rate of searches comprises selecting one of multiple possible rates based on the difference, and using the selected rate as the rate of searches for the second RAT.

An apparatus for wireless communication, comprising:

• means for determining received signal level for a first radio access technology (RAT);
• means for determining received signal level for a second RAT;
• means for determining a difference between the received signal level for the first RAT and the received signal level for the second RAT;
• and
• means for determining a rate of searches for the second RAT based on the difference between the received signal levels for the first and second RATs, the rate identifying a repetition period for performing the searches;
• wherein the means for determining the rate of searches comprises means for comparing the difference against at least one threshold for multiple ranges,
• each range being associated with a different search rate, and means for selecting a search rate associated with a range within which the difference falls as the rate of searches for the second RAT.

A non-transitory computer program product, comprising:

• a computer-readable medium comprising:
• code for causing at least one computer to determine received signal level for a first radio access technology (RAT);
• code for causing at least one computer to determine received signal level for a second RAT;
• code for causing the at least one computer to determine a difference between the received signal level for the first RAT and the received signal level for the second RAT;
• and
• code for causing the at least one computer to determine a rate of searches for the second RAT based on the difference between the received signal levels for the first and second RATs, the rate identifying a repetition period for performing the searches;
• the computer-readable medium further comprising:
• code for causing the at least one computer to compare the difference against at least one threshold for multiple ranges, each range being associated with a different search rate;
• and
• code for causing the at least one computer to select a search rate associated with a range within which the difference falls as the rate of searches for the second RAT.

An apparatus for wireless communication, comprising:

• at least one processor configured to determine received signal level for a first radio access technology (RAT), and to control searches for a second RAT based on the received signal level for the first RAT and frequency bands for the first and second RATs, the control including a repetition period for performing the searches;
• and
• a memory coupled to the at least one processor;
• wherein the at least one processor is configured to select at least one frequency band among multiple frequency bands for the second RAT based on the received signal level and frequency band for the first RAT and the multiple frequency bands for the second RAT, and to perform searches for the second RAT for only the at least one frequency band.

A method for wireless communication, comprising:

• determining received signal level for a first radio access technology (RAT);
• and
• controlling searches for a second RAT based on the received signal level for the first RAT and frequency bands for the first and second RATs, the controlling including a repetition period for performing the searches;
• wherein the controlling searches for the second RAT comprises
• selecting at least one frequency band among multiple frequency bands for the second RAT based on the received signal level and frequency band for the first RAT and the multiple frequency bands for the second RAT, and
• performing searches for the second RAT for only the at least one frequency band.