Enhanced frequency hopping in a wireless system
DC CAFCFirst Claim
Patent Images
1. A method for use in wireless equipment, the method comprising the steps of:
- transmitting signals using frequency hopping over a time period T, bypseudorandomly selecting a frequency from a set of N frequencies such that over at least a portion of the time period T, the frequency selection is constrained to less than the N frequencies and such that at least one of the selected frequencies is prohibited from subsequent selection in at least a portion of the time period T,where N is the total number of frequencies available for frequency hopping.
9 Assignments
Litigations
0 Petitions
Accused Products
Abstract
A wireless endpoint employs frequency hopping for communicating signals in a wireless communications system. Over a time period T, the wireless endpoint performs pseudo-random selection of a frequency from a hopping set of N frequencies such that over at least a portion of the time period T, the frequency selection is constrained to less than the N frequencies.
21 Citations
19 Claims
-
1. A method for use in wireless equipment, the method comprising the steps of:
-
transmitting signals using frequency hopping over a time period T, by pseudorandomly selecting a frequency from a set of N frequencies such that over at least a portion of the time period T, the frequency selection is constrained to less than the N frequencies and such that at least one of the selected frequencies is prohibited from subsequent selection in at least a portion of the time period T, where N is the total number of frequencies available for frequency hopping.
-
-
2. A method of frequency hopping for use in wireless equipment, the method comprising the steps of:
-
storing a set of hopping frequencies; and pseudorandomly selecting frequencies from the set of hopping frequencies over a time period T by limiting the available frequencies from the hopping set over at least a portion of the time period T such that at least one of the selected frequencies is prohibited from subsequent selection in at least a portion of the time period T.
-
-
3. A method of frequency hopping for use in wireless equipment, the method comprising the steps of:
-
initializing a hopping set to a size of F frequencies, the hopping set used to pseudorandomly select therefrom hopping frequencies over a time period T; and reducing the size of the hopping set over a portion of the time period T by at least one frequency such that at least one of the selected frequencies is prohibited from subsequent selection in at least a portion of the time period T, where F is the number of frequencies in a hopping state, H, over which a wireless endpoint is constrained to hop.
-
-
4. A method of frequency hopping for use in wireless equipment, the method comprising the steps of:
-
initializing a hopping set to a size of N frequencies, the hopping set used to select therefrom hopping frequencies over a time period T; and pseudorandomly selecting frequencies from the hopping set over the time period T such that at least one of the selected frequencies is prohibited from subsequent selection in at least a portion of the time period T, where N is the total number of frequencies available for frequency hoping.
-
-
5. A method of frequency hopping for use in wireless equipment, where a hopping set is initialized to a size of N frequencies, the hopping set used to select therefrom hopping frequencies over a time period T, the method comprising the steps of:
-
determining a hopping index value; modifying the hopping index value by at least the modulo of a number F, where F≦
N;pseudorandomly selecting a hopping frequency from the hopping set of a function of the modified hopping index value; adjusting the order of the hopping set such that the selected hopping frequency is now at a position corresponding to the value of F and such that at least one of the selected frequencies is prohibited from subsequent selection in at least a portion of the time period T; reducing the value of F, and returning to the determining step, where N is the total number of frequencies available for frequency hopping and where F is the number of frequencies in a hopping state, H, over which a wireless endpoint is constrained to hop. - View Dependent Claims (6)
-
-
7. A method for frequency hopping for use in wireless equipment, the method comprising the steps of:
-
initializing a hopping set to a size of N frequencies, the hopping set used to select therefrom hopping frequencies over a time period T; dividing the hopping set into an allowable frequency set and a prohibited frequency set; pseudorandomly selecting frequencies from the allowable frequency set; and after at least one frequency selection, adjusting the membership in the allowable frequency set and the prohibited frequency set such that at least one of the selected frequencies is prohibited from subsequent selection in at least a portion of the time period T, where N is the total number of frequencies available for frequency hopping. - View Dependent Claims (8, 9, 10)
-
-
11. A pseudorandom frequency hopping method for use in wireless equipment, the method comprising the steps of:
-
dividing a hopping set into an allowable frequency set and a prohibited frequency set; and transmitting information associated with the division of the hopping set to another wireless endpoint such that at least one of the selected frequencies is prohibited from subsequent selection in at least a portion of the time period T. - View Dependent Claims (12)
-
-
13. A wireless endpoint comprising:
-
a transmitter for transmitting signals using frequency hopping over a time period T; and a processor for pseudorandomly selecting a frequency from a set of N frequencies such that over at least a portion of the time period T, the frequency selection is constrained to less than the N frequencies and such that at least one of the selected frequencies is prohibited from subsequent selection in at least a portion of the time period T, where N is the total number of frequencies available for frequency hopping.
-
-
14. A wireless endpoint comprising:
-
a memory for storing a set of hopping frequencies; and a processor for pseudorandomly selecting frequencies from the set of hopping frequencies over a time period T by limiting the available frequencies from the hopping set over at least a portion of the time period T such that at least one of the selected frequencies is prohibited from subsequent selection in at least a portion of the time period T.
-
-
15. A wireless endpoint comprising:
-
a memory for storing a hopping set comprising F frequencies, the hopping set used to pseudorandomly select therefrom hopping frequencies over a time period T; and a processor for reducing the size of the hopping set over a portion of the time period T by at least one frequency such that at least one of the selected frequencies is prohibited from subsequent selection in at least a portion of the time period T, where F is the number of frequencies in a hopping state, H, over which a wireless endpoint is constrained to hop.
-
-
16. A wireless endpoint comprising:
-
a memory for storing a hopping set comprising N frequencies, the hopping set used to select therefrom hopping frequencies over a time period T; and a processor for pseudorandomly selecting frequencies from the hopping set over a time period T such that at least one of the selected frequencies is prohibited from subsequent selection in at least a portion of the time period T, where N is the total number of frequencies available for frequency hopping.
-
-
17. A wireless endpoint comprising:
-
a memory for storing a hopping set comprising N frequencies, the hopping set used to pseudorandomly select therefrom hopping frequencies over a time period T; and a processor for (a) determining a hopping index value, (b) modifying the hopping index value by at least the modulo of a number F where F≦
N, (c) selecting a hopping frequency from the hopping set as a function of the modffied hopping index value, (d) adjusting the order of the hopping set such that the selected hopping frequency is now at a position corresponding to the value of F such that at least one of the selected frequencies is prohibited from subsequent selection in at least a portion of the time period T, (e) reducing the value of F; and
(f) returning to (a),where N is the total number of frequencies available for frequency hopping and where F is the number of frequencies in a hopping state, H, over which a wireless endpoint is constrained to hop. - View Dependent Claims (18)
-
-
19. A wireless endpoint comprising:
-
a memory for storing a hopping set comprising N frequencies, the hopping set used to select therefrom hopping frequencies over a time period T; and a processor for (a) dividing the hopping set into an allowable frequency set and a prohibited frequency set, (b) pseudorandomly selecting frequencies from the allowable frequency set, and (c) after at least one frequency selection, adjusting the membership in the allowable frequency set and the prohibited frequency set such that at least one of the selected frequencies is prohibited from subsequent selection in at least a portion of the time period T, where N is the total number of frequencies available for frequency hopping.
-
Specification