Velocity based handoff determination in wireless communication system
View Patent ↗Embodiments disclosed herein provide systems and methods for adjusting access node scanning based on the velocity of a wireless communication device. In a particular embodiment, a method provides scanning for a first wireless access node to determine a received power level and comparing the received power level to a threshold power level. If the received power level exceeds the threshold, the method provides exchanging communications with the first wireless access node. The method further provides determining a velocity of the wireless device and adjusting the threshold power level based on the velocity. The method further provides scanning for a second wireless access node to determine a second received power level and comparing the second received power level to the adjusted threshold power level. If the second received power level exceeds the adjusted threshold, the method provides exchanging communications with the second wireless access node.
1. A method of operating a wireless communication device comprising:
scanning for a first wireless access node to determine a received power level for the first access node;
comparing the received power level to a threshold power level;
if the received power level is greater than the threshold power level, exchanging communications with the first wireless access node;
determining a velocity of the wireless communication device;
adjusting the threshold power level based on the velocity;
scanning for a second wireless access node to determine a second received power level for the second access node;
comparing the second received power level to the adjusted threshold power level;
if the second received power level is greater than the adjusted threshold power level, exchanging communications with the second wireless access node.
2. The method of claim 1 wherein adjusting the threshold power level comprises decreasing the threshold power level for an increase in the velocity.
3. The method of claim 1 wherein adjusting the threshold power level comprises increasing the threshold power level for a decrease in the velocity.
4. The method of claim 1 wherein adjusting the threshold power level comprises keeping the threshold power level constant if the velocity stays constant.
5. The method of claim 1 further comprising not scanning for the second wireless access node if the velocity is above a threshold velocity.
6. The method of claim 1 wherein the velocity is in relation to a velocity of the first wireless access node.
7. The method of claim 1 wherein the first wireless access node is part of a first wireless communication network and the second wireless access node is part of a second wireless communication network.
8. The method of claim 7 wherein the first wireless communication network is a cellular wireless network.
9. The method of claim 7 wherein the first wireless communication network is a wireless local area network.
10. The method of claim 1 wherein the velocity is determined using a global positioning system (GPS).
11. A wireless communication device comprising:
a wireless communication interface configured to scan for a first wireless access node to determine a received power level for the first access node and, if the received power level is greater than a threshold power level, exchange communications with the first wireless access node;
a processing system configured to compare the received power level to the threshold power level, determine a velocity of the wireless communication device, and adjust the threshold power level based on the velocity;
the wireless communication interface configured to scan for a second wireless access node to determine a second received power level for the second access node and, if the second received power level is greater than the adjusted threshold power level, exchanging communications with the second wireless access node;
the processing system further configured to compare the second received power level to the adjusted threshold power level.
12. The wireless communication device of claim 11 wherein the processing system is configured to adjust the threshold power level by decreasing the threshold power level for an increase in the velocity.
13. The wireless communication device of claim 11 wherein the processing system is configured to adjust the threshold power level by increasing the threshold power level for a decrease in the velocity.
14. The wireless communication device of claim 11 wherein the processing system is configured to adjust the threshold power level by keeping the threshold power level constant if the velocity stays constant.
15. The wireless communication device of claim 11 wherein the wireless communication interface is further configured to not scan for the second wireless access node if the velocity is above a threshold velocity.
16. The wireless communication device of claim 11 wherein the velocity is in relation to a velocity of the first wireless access node.
17. The wireless communication device of claim 11 wherein the first wireless access node is part of a first wireless communication network and the second wireless access node is part of a second wireless communication network.
18. The wireless communication device of claim 17 wherein the first wireless communication network is a cellular wireless network.
19. The wireless communication device of claim 17 wherein the first wireless communication network is a wireless local area network.
20. The wireless communication device of claim 11 wherein the processing system is configured to determine the velocity by using a global positioning system (GPS).