Methods and apparatuses for downlink tracking reference signal configuration

Patent metadata

Field	Value
Publication number	US-12028286-B2
Application number	US-202318310114-A
Country	US
Kind code	B2
Filing date	May 1, 2023
Priority date	Nov 17, 2017
Publication date	Jul 2, 2024
Grant date	Jul 2, 2024

Abstract

A method, wireless device and network node are disclosed. According to one aspect, a method for a wireless device includes receiving a configuration of a reference signal resource set from the network node, the reference signal resource set being a set of single-symbol and single antenna port reference signal resources in at least one slot; and based on at least one parameter of the received configuration, determining whether the UE can assume a same antenna port for all reference signal resources of the reference signal resource set.

First claim

What is claimed is:

1. A method for a wireless device, WD, configured to communicate with a network node, the method comprising:
receiving, from the network node in a radio resource configuration message, a configuration of a channel state information reference signal, CSI-RS, resource set, the CSI-RS resource set comprising a plurality of single symbol and single antenna port CSI-RS resources in at least one slot, the configuration comprising a parameter indicating that the single antenna ports in the plurality of CSI-RS resources of the CSI-RS resource set are the same antenna port; and
receiving, from the network node, reference signals for tracking in accordance with the configuration of the CSI-RS resource set.

2. The method according to claim 1 , further comprising:
based on the parameter, using the received reference signals as a set of tracking reference signals.

3. The method according to claim 2 , wherein using the received reference signals comprises performing frequency synchronization based on phase differences between the received reference signals.

4. The method according to claim 1 , further comprising:
based on the parameter, determining to not report channel state information based on measurements on the received reference signals.

5. The method according to claim 1 , wherein the configuration of the CSI-RS resource set indicates symbol positions for the single symbols in the plurality of CSI-RS resources.

6. The method according to claim 1 , wherein the configuration of the CSI-RS resource set indicates a same antenna port number for all the single antenna ports in the plurality of CSI-RS resources.

7. A method for a network node, configured to communicate with a wireless device, WD, the method comprising:
transmitting, to the WD in a radio resource configuration message, a configuration of a channel state information reference signal, CSI-RS, resource set, the CSI-RS resource set comprising a plurality of single symbol and single antenna port CSI-RS resources in at least one slot, the configuration comprising a parameter indicating that the single antenna ports in the plurality of CSI-RS resources of the CSI-RS resource set are the same antenna port; and
transmitting, to the WD, reference signals for tracking in accordance with the configuration of the CSI-RS resource set.

8. The method according to claim 7 , wherein transmitting the reference signals in accordance with the configuration enables use of the reference signals as a set of tracking reference signals.

9. The method according to claim 7 , wherein the configuration of the CSI-RS resource set indicates symbol positions for the single symbols in the plurality of CSI-RS resources.

10. The method according to claim 7 , wherein the configuration of the CSI-RS resource set indicates a same antenna port number for all the single antenna ports in the plurality of CSI-RS resources.

11. A wireless device, WD, configured to communicate with a network node, the WD further configured to:
receive, from the network node in a radio resource configuration message, a configuration of a channel state information reference signal, CSI-RS, resource set, the CSI-RS resource set comprising a plurality of single symbol and single antenna port CSI-RS resources in at least one slot, the received configuration comprising a parameter indicating that the single antenna ports in the plurality of CSI-RS resources of the CSI-RS resource set are the same antenna port; and
receive, from the network node, reference signals for tracking in accordance with the configuration of the CSI-RS resource set.

12. The WD according to claim 11 , wherein the WD is further configured to, based on the parameter, use the received reference signals as a set of tracking reference signals.

13. The WD according to claim 12 , wherein using the received reference signals comprises performing frequency synchronization based on phase differences between the received reference signals.

14. The WD according to claim 11 , wherein the WD is further configured to, based on the parameter, determine to not report channel state information based on measurements on the received reference signals.

15. The WD according to claim 11 , wherein the configuration of the CSI-RS resource set indicates symbol positions for the single symbols in the plurality of CSI-RS resources.

16. The WD according to claim 11 , wherein the configuration of the CSI-RS resource set indicates a same antenna port number for all the single antenna ports in the plurality of CSI-RS resources.

17. A network node, configured to communicate with a wireless device, WD, the network node comprising:
transmitting, to the WD in a radio resource configuration message, a configuration of a channel state information reference signal, CSI-RS, resource set, the CSI-RS resource set comprising a plurality of single symbol and single antenna port CSI-RS resources in at least one slot, the configuration comprising a parameter indicating that the single antenna ports in the plurality of CSI-RS resources of the CSI-RS resource set are the same antenna port; and
transmitting, to the WD, reference signals for tracking in accordance with the configuration of the CSI-RS resource set.

18. The network node according to claim 17 , wherein transmitting the reference signals in accordance with the configuration enables use of the reference signals as a set of tracking reference signals.

19. The network node according to claim 17 , wherein the configuration of the CSI-RS resource set indicates symbol positions for the single symbols in the plurality of CSI-RS resources.

20. The network node according to claim 17 , wherein the configuration of the CSI-RS resource set indicates a same antenna port number for all the single antenna ports in the plurality of CSI-RS resources.

Assignees

• Ericsson Telefon Ab L M

Inventors

• Björkegren Håkan
• Ernström Per
• Frenne Mattias
• Grant Stephen
• Werner Karl

Classifications

• H04W56/001

  Synchronization between nodes · CPC title

• H04W76/27

  Transitions between radio resource control [RRC] states · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04L27/2613

  Structure of the reference signals · CPC title

• H04B7/0626

  Channel coefficients, e.g. channel state information [CSI] · CPC title