Wireless network negotiation and optimization
Methods for negotiating optimum parameters for communicating between a wireless control device and a wireless user device are disclosed. The methods generally include transmitting a frequency-hopped and spread negotiation signal using network-maximum parameters. The initial parameters make the negotiation signal long-range but low-data. The methods further include adjusting the initial parameters to optimal parameters based on a link budget and data rate requirements received in response to the negotiation signal. The signals are communicated on the 902-928 MHz unlicensed ISM band, and the parameters include spreading factor, output power, and carrier frequency channel bandwidth.
1. A method comprising:
transmitting a wireless frequency hopping spread spectrum (FHSS) network-negotiation signal using network initialization parameters, wherein the initialization parameters comprise a network maximum spreading factor, a network maximum power, and a minimum carrier frequency channel bandwidth;
receiving, from a user device, a wireless FHSS response signal, in response to the network-negotiation signal, indicating a minimum link budget with the user device, and indicating a maximum data rate required to control the user device;
selecting optimum parameters for communicating with the user device based on the minimum link budget and the minimum data rate, wherein the optimum parameters comprise an optimum spreading factor, an optimum power, and an optimum carrier frequency channel bandwidth;
transmitting the optimum parameters to the user device using the network initialization parameters; and
setting communication parameters for communication with the user device to the optimum parameters.
2. The method of claim 1 , wherein one or more of the maximum spreading factor or the optimum spreading factor ranges from 1 to 18.
3. The method of claim 1 , wherein one or more of the maximum power or the optimum power ranges from 1 dBm to 35 dBm.
4. The method of claim 1 , wherein one or more of the minimum carrier frequency channel bandwidth or the optimum carrier frequency bandwidth ranges from 500 kHz to 7 kHz.
5. The method of claim 1 , wherein the maximum spreading factor is 18, the maximum power is 1 W, and the minimum carrier frequency channel bandwidth is 7 kHz.
6. The method of claim 1 , wherein the minimum link budget ranges from 0 dBm to 170 dBm.
7. The method of claim 1 , wherein the minimum data rate ranges from 100 bit/sec to 500 kbit/sec.
8. The method of claim 1 , further comprising determining a distance to the user device.
9. The method of claim 1 , wherein selecting the optimum parameters is further based on the distance.
10. The method of claim 9 , wherein determining the distance comprises assigning the user device to one of a plurality of spreading factor zones, wherein each spreading factor zone is defined by a unique radius and a unique spreading factor for communicating with devices within the unique radius.
11. The method of claim 10 , wherein a larger radius corresponds with a larger spreading factor.
12. The method of claim 9 , wherein determining the distance comprises assigning the user device to one of a plurality of channel bandwidth zones, wherein each channel bandwidth zone is defined by a unique radius and a unique channel bandwidth for communicating with devices within the unique radius.
13. The method of claim 12 , wherein a larger radius corresponds with a smaller channel bandwidth.
14. A method comprising:
receiving, from a control device, a wireless frequency hopping spread spectrum (FHSS) network-negotiation signal;
responding to the network-negotiation signal using network initialization parameters and indicating a minimum link budget with the control device and a maximum required data rate, wherein the initialization parameters comprising a network maximum spreading factor, a network maximum power, and a minimum carrier frequency channel bandwidth;
receiving, from the control device, a wireless FHSS set signal communicating optimum parameters for communicating with the control device, wherein the optimum parameters are based on the minimum link budget and the maximum required data rate, and wherein the optimum parameters comprise an optimum spreading factor, an optimum power, and an optimum carrier frequency channel bandwidth; and
setting communication parameters for communication with the control device to the optimum parameters.
15. The method of claim 14 , wherein one or more of the maximum spreading factor or the optimum spreading factor ranges from 1 to 18.
16. The method of claim 14 , wherein one or more of the maximum power or the optimum power ranges from 10 dBm to 30 dBm.
17. The method of claim 14 , wherein one or more of the minimum carrier frequency channel bandwidth or the optimum carrier frequency bandwidth ranges from 500 kHz to 7 kHz.
18. The method of claim 14 , wherein the maximum spreading factor is 18, the maximum power is 1 W, and the minimum carrier frequency channel bandwidth is 7 kHz.
19. The method of claim 14 , wherein the minimum link budget ranges from 0 dBm to 170 dBm.
20. The method of claim 14 , wherein the required data rate ranges from 100 bit/sec to 500 kbit/sec.