Downlink measurement design in new radio
Measurement modeling and filtering may include configurable cell quality derivation method is used for multi-beam based NR networks; a common measurement model that considers different characteristics of the two measurement signals, NR synchronization signal and additional reference signal; and a multi-level measurement filtering approach that handles different mobility scenarios in an NR network. Measurement configuration and procedures may include a measurement gap design during which UE may use to perform measurements for beam sweeping based NR networks; a group of triggering events that may be used to trigger UE mobility management in an NR network; a content format that may be used for the transmission of UE measurement report; a measurement object design (the object on which a UE may perform the measurements) to reduce UE measurement overhead and cost; and a downlink measurement based inter-cell handover procedure that may be used in an NR network.
1. A first apparatus comprising a processor, a memory, and communication circuitry, the first apparatus being capable of connecting to a communications network via its communication circuitry, the first apparatus further comprising computer-executable instructions stored in the memory of the first apparatus which, when executed by the processor of the first apparatus, cause the first apparatus to:
receive, from a second apparatus, a first configuration, the first configuration pertaining to a first set of beam-specific measurements of a first set of beams of one or more wireless cells, the first set of beams comprising wide beams, the first configuration comprising a maximum number of beams of a group of beams, the first configuration further comprising a threshold for inclusion in the group of beams;
perform the first set of beam-specific measurements according to the first configuration;
derive, based on the first set of beam-specific measurements, a cell quality, wherein the cell quality is based on the group of beams comprising up to the maximum number of beams, wherein each beam in the group of beams has a quality above the threshold;
transmit, upon detection of a first triggering event and based on the first set of beam-specific measurements, a first measurement report pertaining to the first set of beams;
receive, from the second apparatus, a second configuration, the second configuration pertaining to a second set of beam-specific measurements of a second set of beams of one or more wireless cells, the second set of beams comprising narrow beams;
perform the second set beam-specific measurements according to the second configuration; and
transmit, upon detection of a second triggering event and based on the second set of beam-specific measurements, a second measurement report based upon a second triggering event.
2. The first apparatus of claim 1 , wherein the first set of beam-specific measurements comprise a measure of a reference signal received power, a reference signal received quality, or a signal-to-interference-plus-noise ratio.
3. The first apparatus of claim 2 , wherein a beam of the first set of beams comprises a new radio synchronization signal or a channel state information-reference signal.
4. The first apparatus of claim 1 , wherein the cell quality is based on a best beam.
5. The first apparatus of claim 1 , wherein beam-specific measurements of one or more neighbor cells are performed only if the cell quality of a primary cell is below a threshold.
6. The first apparatus of claim 1 , wherein the first set of beam-specific measurements are performed during a measurement gap selected from a set of measurement gaps, wherein the set of measurement gaps comprises a pattern of gaps in burst series of a serving cell, and wherein the pattern of gaps comprises offsets between gaps of a variable amount that is incremented for each subsequent gap.
7. The first apparatus of claim 1 , wherein the first triggering event is a cell quality measurement of a new radio synchronization signal, and the second triggering event is a cell quality measurement based on a channel state information-reference signal.
8. The first apparatus of claim 1 , wherein the first measurement report comprises cell quality measurements based on a new radio synchronization signal.
9. The first apparatus of claim 1 , wherein:
the second measurement report comprises a beam measurement based on a new radio synchronization signal;
the second set of beam measurements comprises a beam index and
the beam index comprises a time index of the new synchronization signal block.
10. The first apparatus of claim 9 , wherein the beam index is ordered according to a strength of a beam measurement quantity.
11. The first apparatus of claim 9 , wherein the second set of beam measurements further comprise the beam measurement quantity.
12. The first apparatus of claim 1 , wherein the second measurement report comprises beam measurements based on channel state information-reference signals and a beam index, wherein the beam index is ordered according to a strength of a measurement quantity.
13. A second apparatus comprising a processor, a memory, and communication circuitry, the second apparatus being capable of connecting to a communications network via its communication circuitry, the second apparatus further comprising computer-executable instructions stored in the memory of the second apparatus which, when executed by the processor of the second apparatus, cause the second apparatus to:
transmit, to a first apparatus, a first configuration, the first configuration pertaining to beam-specific measurements of a first set of beams of one or more wireless cells the first set of beams comprising wide beams, the first configuration comprising a maximum number of beams of a group of beams, the first configuration further comprising a threshold for inclusion in the group of beams;
transmit, to the first apparatus, a wide beam comprising at least one of a synchronization signal and a channel state information-reference signal;
receive, from the first apparatus, information related to a cell quality generated based on the first set of beam-specific measurements at the first apparatus
transmit, to the first apparatus, a second configuration, the second configuration pertaining to beam-specific measurements of a second set of beams of one or more wireless cells, the second set of beams comprising one or more narrow beams;
transmit, to the first apparatus, a narrow beam; and
receive, from the first apparatus, a second measurement report based in accordance with the second configuration.
14. The second apparatus of claim 13 , wherein the first set of beam-specific measurements comprise a measure of a reference signal received power, a reference signal received quality, or a signal-to-interference-plus-noise ratio.
15. The second apparatus of claim 13 , wherein the cell quality is based on a best beam.
16. The second apparatus of claim 13 , wherein the first measurement report comprises cell quality measurements based on a new radio synchronization signal.
17. The second apparatus of claim 13 , wherein:
the second measurement report comprises a beam measurement based on a new radio synchronization signal;
the second set of beam measurements comprises a beam index; and
the beam index comprises a time index of the new synchronization signal block.
18. The first apparatus of claim 17 , wherein the beam index is ordered according to a strength of a beam measurement quantity.
19. The first apparatus of claim 18 , wherein the second set of beam measurements further comprise the beam measurement quantity.
20. The second apparatus of claim 13 , wherein the second measurement report comprises beam measurements based on channel state information-reference signals and a beam index, wherein the beam index is ordered according to a strength of a measurement quantity.