Method for operating multiple overlapping wireless networks
View Patent ↗A method is provided for operating a plurality of overlapping wireless networks such that they do not interfere with each other. This is accomplished by having each network transmit at a frequency that is offset from a base frequency by an integer multiple of an offset frequency. The offset frequency is generally a small fraction of the base frequency so that the spectral properties of each network are roughly the same. However, each network will transmit at a unique frequency with respect to all of the other overlapping networks. The offset values are preferably symmetrical around zero, and the offset for one network can be zero.
1. A method of operating a plurality of wireless networks, comprising:
transmitting first signals in a first network at a first carrier frequency;
transmitting second signals in a second network at a second carrier frequency, the second carrier frequency being different from the first carrier frequency,
wherein the first carrier frequency is offset from a base carrier frequency by an amount equal to n times an offset frequency,
wherein the second carrier frequency is offset from the base carrier frequency by an amount equal to m times the offset frequency,
wherein n is an integer, m is an integer, and m does not equal n, and
wherein the first carrier frequency and the second carrier frequency are chosen such that a first phase of first chips in the first signal will drift with respect to a second phase of second chips in the second signal.
2. A method of operating a plurality of wireless networks, as recited in claim 1 , wherein n is 1 and m is −1.
3. A method of operating a plurality of wireless networks, as recited in claim 1 , wherein the base carrier frequency is between 2 and 9 GHz.
4. A method of operating a plurality of wireless networks, as recited in claim 3 , wherein the base carrier frequency is between 3.5 and 4.5 GHz.
5. A method of operating a plurality of wireless networks, as recited in claim 4 , wherein the base carrier frequency is about 4.104 GHz.
6. A method of operating a plurality of wireless networks, as recited in claim 3 , wherein the base earner frequency is between 7.5 and 8.5 GHz.
7. A method of operating a plurality of wireless networks, as recited in claim 4 , wherein the base carrier frequency is about 8.208 GHz.
8. A method of operating a plurality of wireless networks, as recited in claim 3 , wherein the offset frequency is between 1 and 10 MHz.
9. A method of operating a plurality of wireless networks, as recited in claim 8 , wherein the offset frequency is about 3 MHz.
10. A method of operating a plurality of wireless networks, as recited in claim 1 , further comprising:
forming the first signals out of first pulses formed of p cycles of a first oscillating signal operating at a first oscillating frequency; and
forming the second signals out of second pulses formed of p cycles of a second oscillating signal operating at a second oscillating frequency,
wherein the first oscillating frequency is offset from a base oscillating frequency by an amount equal to n·p times the offset frequency, and
wherein the second oscillating frequency is offset from a base oscillating frequency by an amount equal to m·p times the offset frequency.
11. A method of operating a plurality of wireless networks, as recited in claim 10 , wherein p is 3.
12. A method of operating a plurality of wireless networks, as recited in claim 1 , wherein the plurality of wireless networks are ultrawide bandwidth networks.
13. A method of operating a plurality of wireless networks, comprising:
transmitting first through k th signals in first through k th networks at first through k th carrier frequencies, respectively; and
offsetting the i th carrier frequency from a base carrier frequency by an amount equal to n i times an offset frequency,
wherein k is an integer greater than 1,
wherein i varies from 1 to k, and
wherein none of n 1 through it n i has the same integer value, and
wherein the first through k th carrier frequencies are chosen such that a first through k th phases of first through k th chips in the first through k th signals, respectfully, will drift with respect to each other.
14. A method of operating a plurality of wireless networks, as recited in claim 13 , wherein k is 4.
15. A method of operating a plurality of wireless networks, as recited in claim 14 wherein n 1 is −2, n 2 is −1, n 3 is 1, and n 4 is 2.
16. A method of operating a plurality of wireless networks, as recited in claim 13 , wherein the base carrier frequency is between 2 and 9 GHz.
17. A method of operating a plurality of wireless networks, as recited in claim 16 , wherein the base carrier frequency is between 3.5 and 4.5 GHz.
18. A method of operating a plurality of wireless networks, as recited in claim 17 , wherein the base carrier frequency is about 4.104 GHz.
19. A method of operating a plurality of wireless networks, as recited in claim 16 , wherein the base carrier frequency is between 7.5 and 8.5 GHz.
20. A method of operating a plurality of wireless networks, as recited in claim 19 , wherein the base carrier frequency is about 8.208 GHz.
21. A method of operating a plurality of wireless networks, as recited in claim 16 , wherein the offset frequency is between 1 and 10 MHz.
22. A method of operating a plurality of wireless networks, as recited in claim 21 , wherein the offset frequency is about 3 MHz.
23. A method of operating a plurality of wireless networks, as recited in claim 13 , wherein k is 3.
24. A method of operating a plurality of wireless networks, as recited in claim 13 , wherein n 1 is −1, n 2 is 0, and n 3 is 1.
25. A method of operating a plurality of wireless networks, as recited in claim 13 , further comprising:
forming the i th signals out of pulses formed of p cycles of an i th oscillating signal operating at an i th oscillating frequency,
wherein the i th oscillating frequency is offset from a base oscillating frequency by an amount equal to n i ·p times the offset frequency.
26. A method of operating a plurality of wireless networks, as recited in claim 25 , wherein p is 3.
27. A method of operating a plurality of wireless networks, as recited in claim 13 , wherein the plurality of wireless networks are ultrawide bandwidth networks.