Reverse loop protocol
View Patent ↗It is possible to operate a wireless system, such as a CDMA system, in a more efficient manner by employing a statistical approach for setting power targets for reverse loop transmission. Unlike present methods for setting such targets a figure-of-merit quantity such as the frame error rate need not be measured to set the reverse loop transmission power for a wireless unit. Instead the target is set on a statistical basis established by sampling. Real time measurement of a quantity-of-merit is not required. A statistical approach produces among other things a decreased sensitivity to rapid changes in transmission conditions.
1. A method for operating a wireless communication system, said system including forward transmission loops from a transmission base station of a cell to a plurality of wireless transceivers and at least five reverse communication loops, said reverse loops each between at least one of said wireless transceivers and said base station, wherein said method comprises, assigning a power target for a reverse loop and adjusting the transmission power of one said transceiver in said reverse loop based on said target set for said reverse loop such that said power target is set based on a statistical quantity other than a figure-of-merit quantity.
2. The method of claim 1 , including additional reverse loops wherein said power targets for said additional reverse loops are set based on measurements of a figure-of-merit quantity.
3. The method of claim 1 , wherein at least one of said statistical quantities is modified during operation of said system.
4. The method of claim 3 , wherein at least one of said statistical quantities is modified based on measurement of the change in number of said transceivers communicating with said base station.
5. The method of claim 1 , wherein said target for a reverse loop is set depending at least in part on a quality of service class allocation.
6. The method of claim 1 , wherein said statistical quantity includes a factor based on interference from transmissions emanating other than from said cell.
7. The method of claim 1 , wherein reverse loop transmitted power deviation from the power target is measured to establish at least one of said statistical quantity.
8. The method of claim 1 , wherein said transceivers are active for a limited fraction of time.
9. The method of claim 1 , wherein a mean, variance, or higher moment of data taken of noise emanating from outside said cell is employed in determining said statistical quantity.
10. A method for operating a wireless communication system comprising:
assigning a power target for a reverse loop, wherein said assigning step is based on one or more statistical quantities, and at least one said statistical quantity is subject to modification during operation of said system; and
adjusting the transmission power of one of a plurality of wireless transceivers in a reverse loop based on the assigned target for said reverse loop such that the power target is assigned based on a statistical quantity other than a real-time frame error rate (FER), wherein said modification is based on a measurement of change in number of said transceivers communicating with said base station.
11. The method of claim 10 , including additional reverse loops wherein said power targets for said additional reverse loops are assigned based on measurements of a figure-of-merit quantity.
12. The method of claim 10 , wherein said target for a reverse loop is assigned depending at least in part on a quality of service class allocation.
13. The method of claim 10 , wherein the at least one said statistical quantity includes a factor based on interference from transmissions emanating other than from said cell.
14. The method of claim 10 , wherein reverse loop transmitted power deviation from the power target is measured to establish the at least one said statistical quantity.
15. A method for operating a wireless communication system comprising:
assigning a power target for a reverse loop, wherein said assigning step is based on one or more statistical quantities; and
adjusting the transmission power of one of a plurality of wireless transceivers in a reverse loop based on the assigned target for said reverse loop such that the power target is assigned based on a statistical quantity other than a real-time frame error rate (FER), wherein a mean, variance, or higher moment of data taken of noise emanating from outside said cell is employed in determining said statistical quantity.
16. The method of claim 15 , including additional reverse loops wherein said power targets for said additional reverse loops are assigned based on measurements of a figure-of-merit quantity.
17. The method of claim 15 , wherein at least one said statistical quantities is subject to modification during operation of the system, and said modification is based on measurement of a change in number of said transceivers communicating with said base station.
18. The method of claim 15 , wherein said target for a reverse loop is assigned depending at least in part on a quality of service class allocation.
19. The method of claim 15 , wherein at least one said statistical quantity includes a factor based on interference from transmissions emanating other than from said cell.
20. The method of claim 15 , wherein reverse loop transmitted power deviation from the power target is measured to establish at least one said statistical quantity.