Incremental realtime signal-quality feedback in 5G/6G
A base station can maintain a transmission beam toward a user device, even in changing conditions, by realtime incremental feedback in 5G and 6G. The incremental feedback is a compact one-of-three request, from the user device, indicating a higher, keep-same, or lower adjustment of a transmission parameter such as the power or beam angle. The base station then adds or subtracts a predetermined increment to that transmission parameter, thereby improving reception with each downlink message. Such incremental adjustment continues with each message to the user device, until the optimum value is reached, at which time the user device selects the keep-same choice. For efficient optimization, the base station can vary the increment size, for example escalating to larger sizes upon repeated same-sign requests, and then de-escalating to smaller increments for fine-tuning and beam optimization. Many other aspects are disclosed.
1. A method for a base station of a wireless network to adjust a transmission parameter, the method comprising:
a) determining an initial value of a transmission parameter for downlink transmissions to a user device;
b) determining an initial size of an increment;
c) transmitting, to the user device, a downlink message concatenated with integer Nsig test signals, each test signal transmitted with a different value of the transmission parameter;
d) receiving, from the user device, a feedback message indicating a particular test signal of the Nsig test signals;
e) according to the particular test signal, producing an updated value of the transmission parameter by adding or subtracting the increment to or from the initial value of the transmission parameter; and
f) according to the updated value of the transmission parameter, transmitting a second message to the user device;
wherein:
a) Nsig equals three;
b) the downlink message is transmitted with the transmission parameter set to an initial value;
c) one of the test signals is transmitted with the transmission parameter set to the initial value;
d) one of the test signals is transmitted with the transmission parameter set to a higher value, which is higher than the initial value; and
e) one of the test signals is transmitted with the transmission parameter set to a lower value, which is lower than the initial value.
2. The method of claim 1 , wherein the downlink message is configured according to 5G or 6G technology.
3. The method of claim 1 , wherein the transmission parameter comprises at least one of:
a) a transmission beam direction;
b) a transmission beam width;
c) a transmission power level;
d) a modulation;
e) a frequency;
f) a polarization;
g) or combinations of these.
4. The method of claim 1 , wherein:
a) the higher value equals the initial value plus the increment; and
b) the lower value equals the initial value minus the increment.
5. The method of claim 1 , further comprising increasing the size of the increment upon receiving at least one of:
a) two successive feedback messages, wherein each of the successive feedback messages indicates, as the selected test signal, a test signal corresponding to an increase in the transmission parameter; and
b) two successive feedback messages, wherein each of the successive feedback messages indicates, as the selected test signal, a test signal corresponding to a decrease in the transmission parameter.
6. The method of claim 5 , further comprising decreasing the size of the increment upon receiving at least one of:
a) a feedback message that indicates a test signal corresponding to no change in the transmission parameter;
b) a feedback message that indicates a test signal corresponding to an increase in the transmission parameter after receiving a feedback message that indicates a test signal corresponding to a decrease in the transmission parameter; and
c) a feedback message that indicates a test signal corresponding to a decrease in the transmission parameter after receiving a feedback message that indicates a test signal corresponding to an increase in the transmission parameter.
7. The method of claim 6 , wherein a size of the increment is restricted to be no larger than a predetermined largest increment size, and no smaller than a predetermined smallest increment size.
8. The method of claim 7 , wherein increasing the size of the increment comprises adding the predetermined smallest increment size to the size of the increment.
9. The method of claim 7 , wherein increasing the size of the increment comprises multiplying the size of the increment by a predetermined factor.
10. The method of claim 7 , wherein decreasing the size of the increment comprises subtracting the predetermined smallest increment size from the size of the increment.
11. The method of claim 7 , wherein decreasing the size of the increment comprises reducing the size of the increment to the predetermined smallest increment size.