Intelligent Iterative Switch Diversity
First Claim
1. A method to switch among a plurality of antennae based on at least one quality metric, comprising:
- monitoring over a first period of time at least one first quality metric relating to the use of a first antenna;
determining a time variation indicator of said at least one first quality metric and storing said time variation indicator of said at least one first quality metric in a first memory location and switching to a second antenna;
monitoring over a second period of time at least one second quality metric relating to the use of said second antenna;
if said at least one second quality metric relating to the use of said second antenna fails said pre-defined quality metric value, and said time variation indicator of said at least one first quality metric meets a pre-defined threshold, switching back to said first antenna; and
if said at least one second quality metric relating to the use of said second antenna fails said pre-defined quality metric value, and said time variation indicator of said at least one first quality metric does not meet said pre-defined threshold, switching to a third antenna.
3 Assignments
0 Petitions
Accused Products
Abstract
A method and system to switch among a plurality of antennae used for wireless communications. A first embodiment is a method for using at least one quality metric and at least one time variation indicator of at least one quality metric to selectively switch among a plurality of antennae to maintain wireless communications. A second embodiment is a method using at least one quality metric and at least one time derivative slope of at least one quality metric to selectively switch among a plurality of antennae to maintain wireless communications. These embodiments can be applied in several wireless communication applications using multiple antennae including, but not limited to, WiMAX applications.
37 Citations
20 Claims
-
1. A method to switch among a plurality of antennae based on at least one quality metric, comprising:
-
monitoring over a first period of time at least one first quality metric relating to the use of a first antenna; determining a time variation indicator of said at least one first quality metric and storing said time variation indicator of said at least one first quality metric in a first memory location and switching to a second antenna; monitoring over a second period of time at least one second quality metric relating to the use of said second antenna; if said at least one second quality metric relating to the use of said second antenna fails said pre-defined quality metric value, and said time variation indicator of said at least one first quality metric meets a pre-defined threshold, switching back to said first antenna; and if said at least one second quality metric relating to the use of said second antenna fails said pre-defined quality metric value, and said time variation indicator of said at least one first quality metric does not meet said pre-defined threshold, switching to a third antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method to switch among a plurality of antennae based on at least one quality metric, said method comprising:
-
monitoring over a first period of time at least one first quality metric relating to the use of a first antenna; if said at least one first quality metric does not fail a pre-defined quality metric value, remaining with said first antenna; if said at least one first quality metric fails said pre-defined quality metric value; determining a time derivative slope of said at least one first quality metric and storing said time derivative slope of said at least one first quality metric in a first memory location; switching to a second antenna; monitoring over a second period of time at least one second quality metric relating to the use of said second antenna; if said at least one second quality metric does not fail said pre-defined quality metric value, remaining with said second antenna; if said at least one second quality metric relating to the use of said second antenna fails said pre-defined quality metric value, and said time derivative slope of said at least one first quality metric has an absolute value less than a pre-defined time derivative slope threshold, switching back to said first antenna and repeating substantially all preceding operations to switch to another antenna when necessary; and if said at least one second quality metric relating to the use of said second antenna fails said pre-defined quality metric value, and said time derivative slope of said at least one first quality metric has an absolute value not less than said pre-defined time derivative slope threshold, switching to a third antenna and repeating substantially all preceding operations with said third antenna substituted for said first antenna. - View Dependent Claims (11, 12, 13, 14)
-
-
15. A method to switch among a plurality of antennae based on a quality metric, said method comprising:
-
monitoring over a first period of time a first quality metric relating to the use of a first antenna; if said first quality metric does not fall below a pre-defined quality metric value, remaining with said first antenna, and updating a plurality of memory locations with a time entry, a mode entry, and a status entry; if said first quality metric falls below said pre-defined quality metric value, determining a time derivative slope of said first quality metric and storing said time derivative slope of said first quality metric in a first memory location; switching to a second antenna; monitoring over a second period of time a second quality metric relating to the use of said second antenna; if said second quality metric does not fall below said pre-defined quality metric value, remaining with said second antenna, and updating said plurality of memory locations with a time entry, a mode entry, and a status entry; if said second quality metric relating to the use of said second antenna is less than said pre-defined quality metric value, and said time derivative slope of said first quality metric has an absolute value less than a pre-defined time derivative slope threshold, switching back to said first antenna and repeating all preceding operations to switch to another antenna when necessary; and if said second quality metric relating to the use of said second antenna is less than said pre-defined quality metric value, and said time derivative slope of said first quality metric has an absolute value not less than a pre-defined time derivative slope threshold, switching to a third antenna and repeating all preceding operations with said third antenna substituted in the role of said first antenna. - View Dependent Claims (16, 17, 18, 19, 20)
-
Specification