Demodulation reference signal transmission from multiple base stations
AssigneeApple Inc.
InventorsAvik Sengupta, Bishwarup Mondal, Alexei Davydov, Sameer Pawar
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Abstract
Systems, apparatuses, methods, and computer-readable media are provided for user equipment (UE) idle mode operations. In embodiments, a UE wakes up more than once during a Discontinuous Reception (DRX) cycle. Inter-frequency measurement requirements may be relaxed based on DRX cycle length. Some embodiments include radiofrequency (RF) circuitry warm-up overhead reduction by on-duration separation with RF circuitry switching pattern adaption. Some embodiments include and RF circuitry warm-up overhead reduction by adaptive synchronization signal block (SSB) reference symbol down-selection. Other embodiments may be described and/or claimed.
Claims20
A user equipment, (UE), the UE comprising:
- interface circuitry;
- and
- baseband circuitry coupled with the interface circuitry, the interface circuitry to communicatively couple the baseband circuitry to radiofrequency, (RF) circuitry, the baseband circuitry to:
- determine, based on Downlink Control Information (DCI) received via the RF circuitry, one or more demodulation reference signal, (DM-RS) port groups to be used for channel estimation, wherein the one or more DM-RS port groups are activated based on the DCI and selected from among a plurality of DM-RS port groups that are configured based on a DM-RS configuration transmitted to the UE using a Radio Resource Control (RRC) message;
- and
- perform channel estimation using one or more configured and activated DM-RS ports belonging to the one or more DM-RS port groups.
One or more non-transitory computer readable media, (CRM) comprising instructions, wherein execution of the instructions by one or more processors of a user equipment, (UE) cause the UE to:
- receive respective Downlink Control Information, (DCI) from each Transmission Reception Point, (TRP) among a plurality of TRPs,
- determine one or more demodulation reference signal, (DM-RS) port groups for each TRP based on the respective DCI received from each TRP, wherein the one or more DM-RS port groups for each TRP are activated based on the respective DCI and selected from among a plurality of DM-RS port groups that are configured based on a DM-RS configuration transmitted to the UE using a Radio Resource Control (RRC) message;
- and
- perform channel estimation using one or more configured and activated DM-RS ports belonging to respective ones of the one or more DM-RS port groups.
An apparatus to be implemented in a Radio Access Network, (RAN) node, the apparatus comprising:
- processor means for generating Downlink Control Information, (DCI) to indicate one or more demodulation reference signal (DM-RS) port groups, each of the one or more DM-RS port groups including one or more configured DM-RS ports to be used for channel estimation, wherein the one or more DM-RS port groups are activated based on the DCI and selected from among a plurality of DM-RS port groups that are configured based on a DM-RS configuration transmitted using a Radio Resource Control (RRC) message, and wherein the channel estimation is performed using one or more configured and activated DM-RS ports belonging to the one or more DM-RS port groups;
- and
- radiofrequency (RF) means for transmitting the DCI to a user equipment (UE);
- and transmitting DM-RSs in time-frequency resources according to the one or more configured DM-RS ports, wherein the time-frequency resources in which the DM-RSs are to be transmitted according to the one or more configured DM-RS ports are orthogonal to one another or are quasi-orthogonal to one another.
Dependencies are inferred from the claim text.