Method for frequency hopping in a TDMA wireless communication system
First Claim
1. A method for frequency hopping in a time division multiple access wireless communication system, comprising:
- first measuring, for at least one idle time slot, interference for a first period at a first rate on available communication frequencies in a coverage area;
forming a first list of frequencies from the available communication frequencies based on the first interference measurements;
second measuring, for the idle time slot, interference for a second period at a second rate on the frequencies in the first list;
determining an interference level requirement for a call associated with a time slot;
selecting frequencies from the first list meeting the interference level requirement based on the second interference measurements during the associated time slot; and
performing frequency hopping for the call using the selected frequencies.
1 Assignment
0 Petitions
Accused Products
Abstract
The interference on the available communication frequencies is measured during an idle time slot over a first period of time at a first rate. The available frequencies are prioritized based on the interference measurements, and a list is formed of the frequencies having the lowest interference measurements. Interference measurements are made at a second rate, greater than the first rate, for a second period of time less than the first period. When a call is assigned, the interference level requirements for the call are given, and the carrier power level of the call is measured. The carrier-to-interference ratio of each frequency in the list is determined using the second interference measurements and the measured carrier power. The frequencies in the list meeting the interference level requirements for the call are then selected, and frequency hopping while serving the call is performed using the selected frequencies.
28 Citations
28 Claims
-
1. A method for frequency hopping in a time division multiple access wireless communication system, comprising:
-
first measuring, for at least one idle time slot, interference for a first period at a first rate on available communication frequencies in a coverage area; forming a first list of frequencies from the available communication frequencies based on the first interference measurements; second measuring, for the idle time slot, interference for a second period at a second rate on the frequencies in the first list; determining an interference level requirement for a call associated with a time slot; selecting frequencies from the first list meeting the interference level requirement based on the second interference measurements during the associated time slot; and performing frequency hopping for the call using the selected frequencies. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method for frequency hopping in a time division multiple access wireless communication system, comprising:
-
first measuring interference for a first period at a first rate on available communication frequencies in a coverage area; forming a first list of frequencies from the available communication frequencies based on the first interference measurements; second measuring, for at least one idle time slot, interference for a second period at a second rate on the frequencies in the first list; determining an interference level requirement for a call associated with a time slot; selecting frequencies from the first list meeting the interference level requirement based on the second interference measurements during the associated time slot; and performing frequency hopping for the call using the selected frequencies. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
-
-
19. A method for frequency hopping in a time division multiple access wireless communication system, comprising:
-
first measuring interference for a first period at a first rate on available communication frequencies in a coverage area; forming a first list of frequencies from the available communication frequencies based on the first interference measurements; second measuring, for each idle time slot, interference for a second period at a second rate on the frequencies in the first list; forming, for each idle time slot, a second list of the frequencies in the first list that is order according to the second interference measurements for the time slot; forming a composite second list from the second lists; determining an interference level requirement for a call associated with a time slot; selecting frequencies from the composite second list meeting the interference level requirement based on the second interference measurements during the associated time slot; and performing frequency hopping for the call using the selected frequencies. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28)
-
Specification