Configurable sharing between intra- and inter-frequency measurements
Embodiments include methods performed by a user equipment, UE, to schedule a plurality of measurement activities in a wireless network. Such embodiments include obtaining a measurement configuration (e.g., from a network node) relating to first and second groups of measurements, and a gap-sharing ratio between the first and second groups of measurements. Such embodiments also include selecting an analysis period for a measurement schedule, and determining, over the analysis period, measurement load information related to each of the first and second groups within one or more measurement gaps comprising the analysis period. Such embodiments also include determining, based on the measurement load information and the gap-sharing ratio, a measurement schedule for the first and second groups of measurements. Some embodiments include performing measurements according to the determined schedule. Other embodiments include methods performed by network nodes, as well as UEs and network nodes configured to perform the respective methods.
1. A method performed by a user equipment (UE) to schedule a plurality of measurement activities in a wireless network, the method comprising:
receiving, from a network node in the wireless network, a measurement
configuration relating to:
a first group of measurements;
a second group of measurements; and
a gap-sharing ratio between the first and second groups of measurements;
selecting an analysis period for a measurement schedule;
determining measurement load information related to each of the first and second groups within one or more measurement gaps comprising the analysis period;
based on the measurement load information and the gap-sharing ratio, determining a measurement schedule for the first and second groups of measurements; and
performing the first and second groups of measurements, according to the determined measurement schedule, on signals received from the wireless network during the measurement gaps.
2. The method of claim 1 , wherein:
each of the first group and the second group is associated with a set of signals having at least one of the following: a periodicity, a duration, a time offset, and a fundamental measurement interval;
the measurement configuration further comprises a measurement gap repetition period (MGRP) relating to gaps for performing the first and second groups of measurement; and
selecting the analysis period is based on one of the following functions of the MGRP and of the respective periodicities associated with the plurality of measurement activities: least common multiple (LCM), common multiple, or maximum.
3. The method of claim 1 , wherein:
the first group of measurements comprises intra-frequency measurements; and
the second group of measurements comprises at least one of the following: inter-frequency measurements and inter-radio access technology (inter-RAT) measurements.
4. The method of claim 1 , wherein:
selecting the analysis period further comprises determining a set of measurement gaps over the duration of the analysis period;
determining the measurement load information comprises determining for each particular measurement gap of the set:
a total number of measurements of the first group that overlap the particular measurement gap; and
a total number of measurements of the second group that overlap the particular measurement gap.
5. The method of claim 4 , wherein determining the measurement schedule comprises:
selecting a reference interval for gap usage determination, wherein the reference interval is an integer multiple of the analysis period;
determining a set of measurement gaps, within the reference interval, in which the total number of measurements of the first group and the total number of measurements of the second group are non-zero; and
for each measurement gap of the determined set, determining a measurement schedule for measurements of the first group and measurements of the second group according to the gap-sharing ratio.
6. The method of claim 5 , wherein determining the measurement schedule further comprises: for each measurement gap of the reference interval that is not a member of the determined set, scheduling measurements from either the first group or the second group without consideration of the gap-sharing ratio.
7. The method of claim 6 , wherein determining the measurement schedule further comprises: for each measurement gap of the reference interval, scheduling at least one of the following according to an equal share of measurements during at least the reference interval: measurements of the first group, and measurements of the second group.
8. The method of claim 1 , wherein:
the received measurement configuration comprises an index relating to one or more tables, each table comprising a plurality of gap-sharing ratio values; and
determining the measurement schedule comprises selecting the gap-sharing ratio from one of the tables based on the index.
9. The method of claim 8 , wherein:
the one or more tables comprise a plurality of tables;
determining the measurement schedule further comprises selecting a particular one of the plurality of tables based on a degree of overlap between the first group of measurements and the second group of measurements; and
the gap-sharing radio is selected from the selected table.
10. A method performed by a network node, in a wireless communication network, to configure a user equipment (UE) to perform a plurality of measurement activities, the method comprising:
configuring the UE with a measurement configuration relating to:
a first group of measurements;
a second group of measurements; and
a gap-sharing ratio between the first and second groups of measurements;
selecting an analysis period for a measurement schedule;
determining measurement load information related to each of the first and second groups within one or more measurement gaps comprising the analysis period; and
determining, based on the measurement load information and the gap-sharing ratio, one or more measurement requirements relating to at least a portion of the first and second groups of measurements; and
determining an updated measurement configuration, for the UE, based on the one or more measurement requirements.
11. The method of claim 10 , further comprising transmitting the updated measurement configuration to the UE.
12. The method of claim 10 , wherein:
each of the first group and the second group is associated with a set of signals having at least one of the following: a periodicity, a duration, a time offset, and a fundamental measurement interval; and
the measurement configuration further comprises a measurement gap repetition period (MGRP) relating to gaps for performing the first and second groups of measurement.
13. The method of claim 12 , wherein selecting the analysis period is based on one of the following functions of the MGRP and the of respective periodicities associated with the plurality of measurement activities: least common multiple (LCM); common multiple; or maximum.
14. The method of claim 10 , wherein:
the first group of measurements comprises intra-frequency measurements; and
the second group of measurements comprises at least one of the following: inter-frequency measurements and inter-radio access technology (inter-RAT) measurements.
15. The method of claim 10 , wherein:
selecting the analysis period comprises determining a set of measurement gaps over the duration of the analysis period; and
determining the measurement load information comprises determining for each particular measurement gap of the set:
a total number of measurements of the first group that overlap the particular measurement gap, and
a total number of measurements of the second group that overlap the particular measurement gap.
16. The method of claim 10 , wherein:
the measurement configuration comprises an index relating to one or more tables, each table comprising a plurality of gap-sharing ratio values; and
determining the one or more measurement requirements comprises selecting the gap-sharing ratio from one of the tables based on the index.
17. The method of claim 15 , wherein determining the one or more measurement requirements comprises:
selecting a reference interval for gap usage determination, wherein the reference interval is an integer multiple of the analysis period;
determining a set of measurement gaps, within the reference interval, in which the total number of measurements of the first group and the total number of measurements of the second group are non-zero; and
for each measurement gap of the determined set, determining a measurement schedule for measurements of the first group and measurements of the second group according to the gap-sharing ratio.
18. The method of claim 17 , wherein determining the one or more measurement requirements further comprises: for each measurement gap of the reference interval that is not a member of the determined set, scheduling measurements from one of the first group and the second group without consideration of the gap-sharing ratio.
19. The method of claim 18 , wherein determining the one or more measurement requirements further comprises: for each measurement gap of the reference interval, scheduling at least one of the following according to an equal share of measurements during at least the reference interval: measurements of the first group, and measurements of the second group.
20. The method of claim 17 , wherein:
the one or more measurement requirements are determined based on the measurement schedule; and
the one or more measurement requirements include one or more of the following with respect to one or more carrier frequencies:
measurement period;
detection interval for synchronization signal and PBCH block (SSB);
SSB time index reading delay; and
one or more scaling factors for radio resource management (RRM) delays due to multi-carrier measurement.
21. The method of claim 10 , wherein the updated measurement configuration comprises at least one of the following:
reconfiguration of absolute or relative measurement offsets; and
reconfiguration of at least one of at least one of the following: transmission periodicity of the measured signals, measurement gap periodicity, measurement periodicity, measurement window periodicity, and measurement gap loading.
22. A user equipment (UE) configured to schedule a plurality of measurement activities in a wireless network, the UE comprising:
a radio transceiver configured for communicating with a network node in the wireless communication network; and
processing circuitry operatively associated with the radio transceiver, whereby the combination of the processing circuitry and the radio transceiver is configured to perform operations corresponding to the method of claim 1 .
23. A non-transitory, computer-readable medium storing computer-executable instructions that, when executed by at least one processor comprising a user equipment (UE) operating in a wireless network, configure the UE to perform operations corresponding to the method of claim 1 .
24. A network node, in a wireless network, arranged to configure a user equipment (UE) to perform a plurality of measurement activities, the network node comprising:
a radio network interface configured to communicate with the UE; and
processing circuitry operatively coupled with the radio network interface, whereby the combination of the processing circuitry and the radio network interface is configured to perform operations corresponding to the method of claim 10 .
25. A non-transitory, computer-readable medium storing computer-executable instructions that, when executed by at least one processor comprising a network node in a wireless network, configure the network node to perform operations corresponding to the method of claim 10 .