Techniques for measuring synchronization signal blocks in wireless communications
Aspects described herein relate to receiving multiple synchronization signal blocks (SSBs) from a target cell over a measurement time window. A repeating beam index for one or more of the multiple SSBs can be identified based at least in part on a determination of a repeat parameter indicating a number of beams in a SSB pattern for the target cell. A beam set of the one or more of the multiple SSBs determined to have the same repeating beam index can be associated. One or more parameters of the one or more of the multiple SSBs of the beam set can be measured and reported.
1 . A method for wireless communication, comprising:
receiving multiple synchronization signal blocks (SSBs) in multiple SSB bursts from a cell over respective measurement time windows;
identifying, for each SSB in a subset of the multiple SSBs, a repeating beam index, wherein the identifying, for each SSB, the repeating beam index is based at least in part on an index of a demodulation reference signal (DM-RS) sequence associated with the respective SSB and a repeat parameter indicating a number of beams in a SSB pattern for the cell; and
associating two or more SSBs of the subset of the multiple SSBs, each received in a different SSB burst of the multiple SSB bursts over the respective measurement time windows and having the same repeating beam index, as having a same measurement value.
2 . The method of claim 1 , further comprising receiving, from a serving cell, an indication of the repeat parameter.
3 . The method of claim 2 , wherein the indication of the repeat parameter applies to at least one of cells associated with a frequency.
4 . The method of claim 2 , wherein the indication of the repeat parameter applies to one or more lists of cells within or across a frequency.
5 . The method of claim 1 , further comprising reporting, to a serving cell, the repeat parameter received from a broadcast channel of the cell based on serving cell configuration.
6 . The method of claim 1 , further comprising reporting, to a serving cell, one or more target cells from which SSBs are received and for which an associated repeat parameter is not determined.
7 . The method of claim 1 , further comprising determining the two or more SSBs to have a threshold signal strength, and decoding, based on the two or more SSBs having the threshold signal strength, a broadcast channel of the cell to determine the repeat parameter.
8 . The method of claim 1 , further comprising reporting the same measurement value at least in part by filtering measurements of the two or more SSBs having a signal strength that achieves a threshold.
9 . The method of claim 8 , wherein the reporting the same measurement value comprises determining at least one of an average value of one or more parameters of the two or more SSBs, a maximum value of the one or more parameters of the two or more SSBs, a random selection of a value of the one or more parameters of the two or more SSBs, or all values of the one or more parameters of the two or more SSBs.
10 . The method of claim 1 , further comprising receiving, from a serving cell, at least one of an indication to measure outside the respective measurement time windows associated with a frequency, an indication of an additional respective measurement time window or a listing of cells, including the cell, to measure within the additional respective measurement time window.
11 . The method of claim 10 , further comprising receiving, from the serving cell, a gap periodicity or offset for starting measuring, or an activation or deactivation command to start or stop measuring in the gap duration.
12 . The method of claim 1 , further comprising reporting, to a serving cell and based on the associating the two or more SSBs, a measurement of one or more parameters of at least one SSB of the two or more SSBs.
13 . The method of claim 1 , wherein the associating the two or more SSBs is based on receiving an indication of quasi-colocation between the two or more SSBs.
14 . An apparatus for wireless communication, comprising:
a transceiver;
a memory configured to store instructions; and
one or more processors communicatively coupled with the transceiver and the memory, wherein the one or more processors are configured to:
receive multiple synchronization signal blocks (SSBs) in multiple SSB bursts from a cell over respective measurement time windows;
identify, for each SSB in a subset of the multiple SSBs, a repeating beam index based at least in part on an index of a demodulation reference signal (DM-RS) sequence associated with the respective SSB and a repeat parameter indicating a number of beams in a SSB pattern for the cell; and
associate, in the memory, two or more SSBs of the subset of the multiple SSBs, each received in a different SSB burst of the multiple SSB bursts over the respective measurement time windows and having the same repeating beam index as having a same measurement value.
15 . The apparatus of claim 14 , wherein the one or more processors are further configured to receive, from a serving cell, an indication of the repeat parameter.
16 . The apparatus of claim 15 , wherein the indication of the repeat parameter applies to at least one of cells associated with a frequency.
17 . The apparatus of claim 15 , wherein the indication of the repeat parameter applies to one or more lists of cells within or across a frequency.
18 . The apparatus of claim 14 , wherein the one or more processors are further configured to report, to a serving cell, the repeat parameter received from a broadcast channel of the cell based on serving cell configuration.
19 . The apparatus of claim 14 , wherein the one or more processors are further configured to report, to a serving cell, one or more target cells from which SSBs are received, by the transceiver, and for which an associated repeat parameter is not determined.
20 . The apparatus of claim 14 , wherein the one or more processors are further configured to determine the two or more SSBs to have a threshold signal strength, and wherein the one or more processors are configured to determine the repeat parameter at least in part by decoding, based on the two or more SSBs having the threshold signal strength, a broadcast channel of the cell.
21 . The apparatus of claim 14 , wherein the one or more processors are further configured to report the same measurement value at least in part by filtering measurements of the two or more SSBs having a signal strength that achieves a threshold.
22 . The apparatus of claim 21 , wherein the one or more processors are configured to report the same measurement value as one of an average value of one or more parameters of the two or more SSBs, a maximum value of the one or more parameters of the two or more SSBs, or a random selection of a value of the one or more parameters of the two or more SSBs.
23 . The apparatus of claim 14 , wherein the one or more processors are further configured to report, to a serving cell and based on the one or more processors associating the two or more SSBs, a measurement of one or more parameters of at least one SSB of the two or more SSBs.
24 . The apparatus of claim 14 , wherein the one or more processors are configured to associate the two or more SSBs based on receiving, by the transceiver, an indication of quasi-colocation between the two or more SSBs.
25 . The method of claim 1 , wherein the respective measurement time windows each include multiple SSB occasions for transmitting SSBs, and wherein, for each SSB in the subset of the multiple SSBs, the index of the DM-RS sequence associated with the respective SSB corresponds to an SSB occasion index of one of the multiple SSB occasions over which the respective SSB is received.
26 . The apparatus of claim 14 , wherein the respective measurement time windows each include multiple SSB occasions for transmitting SSBs, and wherein, for each SSB in the subset of the multiple SSBs, the index of the DM-RS sequence associated with the respective SSB corresponds to an SSB occasion index of one of the multiple SSB occasions over which the respective SSB is received.