Systems and methods for validating parameters
Systems and methods for validating one or more parameters are provided. In some embodiments, a method performed by a wireless device for validating parameters includes: obtaining information about measurement change for validating one or more parameters; obtaining information about a number of thresholds and associated thresholds used for validating the one or more parameters; and performing parameter validation based on the obtained information. In some embodiments, this is for a Timing Advance (TA) parameter for a Preconfigured Uplink Resources (PUR) transmission. In this way, TA validation becomes more reliable as the validation range can be adapted to the wireless device mobility.
1. A method performed by a wireless device for validating one or more parameters, the method comprising:
obtaining information about measurement change for validating the one or more parameters;
obtaining information about a number of thresholds (K) and associated thresholds used for validating the one or more parameters; and
performing parameter validation based on the obtained information;
wherein a value of K is an integer and each threshold is associated with a certain value range that the wireless device uses for validating the parameter;
wherein performing the parameter validation comprises performing the parameter validation based on:
a first threshold (H 1 ) which belongs to a first value range (R 1 ) if K=1; and
a second threshold (H 2 ) and a third threshold (H 3 ) which belong to a second value range (R 2 ) if K=2.
2. The method of claim 1 wherein the one or more parameters comprise a Timing Advance, TA, parameter for a Preconfigured Uplink Resources, PUR, transmission.
3. The method of claim 1 wherein performing the parameter validation comprises performing the parameter validation based on a maximum allowed variation in signal strength (ΔSSmax) in a serving cell.
4. The method of claim 1 wherein ΔSSmax comprises one or more of a change in Reference Signal Received Power, RSRP, (ΔRSRPmax) and a change in path loss (ΔPLmax).
5. The method of claim 1 wherein ΔSSmax can be derived using a first measurement (M 1 ) and a second measurement (M 2 ) using one or more functions chosen from the group consisting of: absolute difference between M 1 and M 2 ; magnitude of M 1 and M 2 ; fraction between M 1 and M 2 ; average of M 1 and M 2 ; minimum of M 1 and M 2 ; and maximum of M 1 and M 2 .
6. The method of claim 1 wherein obtaining the information about the number of thresholds (K) comprises obtaining the information from a network node.
7. The method of claim 1 wherein obtaining the information about the number of thresholds (K) comprises obtaining the information by the wireless device based on a predefined rule.
8. The method of claim 7 wherein the predefined rule comprises one or more of the group consisting of:
K depends on a coverage enhancement level of the wireless device with respect to the serving cell; and
K depends on a received signal level of the wireless device with respect to the serving cell.
9. The method of claim 1 wherein an actual value of the particular threshold is configured by the network node but the actual value belongs to a value range associated with K.
10. The method of claim 1 wherein only K is configured by the network node, but an actual value of the particular threshold is determined by the wireless device based on one or more criteria.
11. The method of claim 10 wherein the one or more criteria comprise one or more of the group consisting of: a TA value; a Discontinuous Reception, DRX, cycle; and a wireless device speed.
12. The method of claim 1 wherein:
if the ΔSSmax fulfills conditions on the value range, then the TA is considered valid and the wireless device is allowed to carry out the PUR transmission; and
if the ΔSSmax does not fulfill conditions on the value range, the TA is considered invalid and the wireless device is not allowed to carry out the PUR transmission.
13. A method performed by a base station for configuring one or more parameters, the method comprising:
obtaining one or more configuration parameters that may affect measurements of a wireless device; and
configuring the wireless device with a number of thresholds (K) and associated thresholds for validating the one or more parameters based on the one or more configuration parameters;
wherein a value of K is an integer and each threshold is associated with a certain value range that the wireless device uses for validating the parameter;
wherein:
a first threshold (H 1 ) which belongs to a first value range (R 1 ) if K=1; and
a second threshold (H 2 ) and a third threshold (H 3 ) which belong to a second value range (R 2 ) if K=2.
14. The method of claim 13 wherein the one or more parameters comprises a Timing Advance, TA, parameter for a Preconfigured Uplink Resources, PUR, transmission.
15. The method of claim 13 wherein performing parameter validation comprises performing the parameter validation based on a maximum allowed variation in signal strength (ΔSSmax) in a serving cell.
16. The method of claim 13 wherein ΔSSmax comprises one or more of a change in Reference Signal Received Power, RSRP, (ΔRSRPmax) and a change in path loss (ΔPLmax).
17. The method of claim 13 wherein ΔSSmax can be derived using a first measurement (M 1 ) and a second measurement (M 2 ) using one or more functions chosen from the group consisting of: absolute difference between M 1 and M 2 ; magnitude of M 1 and M 2 ; fraction between M 1 and M 2 ; average of M 1 and M 2 ; minimum of M 1 and M 2 ; and
maximum of M 1 and M 2 .
18. The method of claim 13 wherein configuring the wireless device with the number of thresholds (K) comprises transmitting information to the wireless device.
19. The method of claim 13 wherein configuring the wireless device with the number of thresholds (K) comprises the wireless device using a predefined rule.
20. The method of claim 19 wherein the predefined rule comprises one or more of the group consisting of:
K depends on a coverage enhancement level of the wireless device with respect to the serving cell; and
K depends on a received signal level of the wireless device with respect to the serving cell.
21. The method of claim 13 wherein an actual value of the particular threshold is configured by the base station but the actual value belongs to a value range associated with K.
22. The method of claim 13 wherein only K is configured by the base station, but the actual value of the particular threshold is determined by the wireless device based on one or more criteria.
23. The method of claim 13 wherein:
if the ΔSSmax (e.g., ΔRSRPmax) fulfills the conditions on value range, then the TA is considered valid and the wireless device is allowed to carry out the PUR transmission; and
if the ΔSSmax does not fulfill the conditions on the value range, the TA is considered invalid and the wireless device is not allowed to carry out the PUR transmission.
24. The method of claim 13 wherein the one or more configuration parameters that may affect the measurements of a wireless device comprise one or more of the group consisting of: Discontinuous Reception, DRX, cycle lengths; a PUR configuration; a wireless device speed; a wireless device direction of movement; and a geographical location of the wireless device.
25. A wireless device for validating one or more parameters, the wireless device comprising:
one or more processors; and
memory storing instructions executable by the one or more processors, whereby the wireless device is operable to:
obtain information about a measurement change for validating the one or more parameters;
obtain information about a number of thresholds (K) and associated thresholds used for validating the one or more parameters; and
perform parameter validation based on the obtained information;
wherein a value of K is an integer and each threshold is associated with a certain value range that the wireless device uses for validating the parameter;
wherein performing the parameter validation comprises performing the parameter validation based on:
a first threshold (H 1 ) which belongs to a first value range (R 1 ) if K=1; and
a second threshold (H 2 ) and a third threshold (H 3 ) which belong to a second value range (R 2 ) if K=2.
26. A base station for configuring one or more parameters, the base station comprising:
one or more processors; and
memory comprising instructions to cause the base station to:
obtain one or more configuration parameters that may affect the measurements of a wireless device; and
configure the wireless device with a number of thresholds (K) and associated thresholds for validating the one or more parameters based on the one or more configuration parameters;
wherein a value of K is an integer and each threshold is associated with a certain value range that the wireless device uses for validating the parameter;
wherein:
a first threshold (H 1 ) which belongs to a first value range (R 1 ) if K=1; and
a second threshold (H 2 ) and a third threshold (H 3 ) which belong to a second value range (R 2 ) if K=2.