Down-sampling of cell-specific reference signals (CRS) for a new carrier type (NCT)

• US 9,681,428 B2
• Filed: 03/18/2013
• Issued: 06/13/2017
• Est. Priority Date: 03/16/2012
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel Corporation
• Inventors: Bashar, Shafi, Fwu, Jong-Kae, Zhu, Yuan, Niu, Huaning, Davydov, Alexei
• Primary Examiner(s): Tran, Phuc
• Application Number:
  US13/997,741
• Publication Number:
  US 20140254504A1
• Time in Patent Office: 1,548 Days
• CPC Class Codes: H04J 11/0036 at the receiver
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

Technology for selecting physical resource blocks (PRB) for cell-specific reference signal (CRS) transmission for a new carrier type (NCT) is disclosed. In an example, device operable in an evolved Node B (eNB) to select physical resource blocks (PRB) for cell-specific reference signal (CRS) transmission for a new carrier type (NCT) can include computer circuitry configured to: Determine a frequency bandwidth for the NCT; and select a CRS pattern of PRBs for a transmission of the CRS in the frequency bandwidth, wherein the frequency bandwidth includes PRBs with CRS and PRBs without CRS.

Claims

1. A node device operable in an evolved Node B (eNB) to select physical resource blocks (PRB) for cell-specific reference signal (CRS) transmission for a new carrier type (NCT), the node device comprising:

a memory;

a processor coupled to the memory, wherein the processor is configured with processor-executable instructions to perform operations comprising;

selecting, using the processor, a CRS distribution pattern in a signal bandwidth for the NCT; and

selecting, using the processor, a number of central PRBs less than a total number of PRBs in the signal bandwidth for a transmission of the CRS, wherein the signal bandwidth includes PRBs with CRS and PRBs without CRS.

2. The node device of claim 1, wherein the selected signal bandwidth includes a CRS distribution pattern that includes a subband of CRS PRBs at central PRBs and edge PRBs, wherein a subband is a set of k contiguous PRBs and k is a function of the signal bandwidth for a system.

3. The node device of claim 1, wherein the selected signal bandwidth includes a CRS distribution pattern that includes a distributive pattern of CRS PRBs in a remaining number of the total number of PRBs.

4. The node device of claim 1, wherein the processor is further configured with processor-executable instructions to perform operations comprising:

rotating between a set of CRS distribution patterns in a frequency domain based on a subframe index in a time domain of the selected signal bandwidth.

5. The node device of claim 1, wherein the processor is further configured with processor-executable instructions to perform operations comprising:

selecting a CRS periodicity for a transmission of the CRS in a time domain.

6. The node device of claim 1, wherein the processor is further configured with processor-executable instructions to perform operations comprising:

determining a total number of antenna ports available for a CRS transmission; and

selecting a reduced number of antenna ports for the CRS transmission less than the total number of antenna ports.

7. The node device of claim 1, wherein the processor is further configured with processor-executable instructions to perform operations comprising:

removing a cell-specific frequency shifting of the CRS for the NCT.

8. The node device of claim 1, wherein the processor is further configured with processor-executable instructions to perform operations comprising:

transmitting an indication to a user equipment (UE) of the CRS pattern, wherein the UE includes at least one of an antenna, a touch sensitive display screen, a speaker, a microphone, a graphics processor, an application processor, internal memory, a non-volatile memory port, and combinations thereof; and

transmitting the PRBs in the signal bandwidth on a specified antenna port at a specified CRS periodicity, wherein the NCT is a non-stand alone NCT or a stand-alone NCT.

9. The node device of claim 1, wherein the processor is further configured with processor-executable instructions to perform operations comprising selecting the CRS pattern of PRBs for the transmission of the CRS, and further comprising:

selecting, using the processor, a CRS distribution pattern having a IQ number of distributed subbands of PRBs for a transmission of the CRS in the signal bandwidth, wherein the signal bandwidth includes PRBs with CRS and PRBs without CRS.

10. The node device of claim 9, wherein K₁ is represented by 1 to ┌

N_RB^DL/k┐

, where a subband is a set of k contiguous PRBs and k is a function of the signal bandwidth for a system, and N_RB^DL is a number of PRBs for the signal bandwidth of the system.

11. The node device of claim 9, wherein the CRS distribution pattern includes a subband of CRS PRBs at central PRBs and edge PRBs, wherein a subband is a set of k contiguous PRBs and k is a function of the signal bandwidth for a system.

12. The node device of claim 9, wherein the processor is further configured with processor-executable instructions to perform operations comprising:

rotating between a set of CRS distribution patterns in the frequency domain based on a subframe index in the time domain.

13. The node device of claim 9, wherein the processor is further configured with processor-executable instructions to perform operations comprising:

selecting a CRS periodicity for a transmission of the CRS in a time domain.

14. The node device of claim 9, wherein the processor is further configured with processor-executable instructions to perform operations comprising:

determining a total number of antenna ports available for a CRS transmission; and

selecting a reduced number of antenna ports for the CRS transmission less than the total number of antenna ports.

15. The node device of claim 9, wherein the processor is further configured with processor-executable instructions to perform operations comprising:

removing a cell-specific frequency shifting of the CRS for the NCT.

16. The node device of claim 9, wherein the processor is further configured with processor-executable instructions to perform operations comprising:

transmitting an indication to a user equipment (UE) of the CRS pattern, wherein the UE includes at least one of an antenna, a touch sensitive display screen, a speaker, a microphone, a graphics processor, an application processor, internal memory, a non-volatile memory port, and combinations thereof; and

transmitting the PRBs in the signal bandwidth on a specified antenna port at a specified CRS periodicity, wherein the NCT is a non-stand alone NCT or a stand-alone NCT.

17. A node device operable in an evolved Node B (eNB) to select physical resource blocks (PRB) for cell-specific reference signal (CRS) transmission for a new carrier type (NCT), the node device comprising:

a memory;

a processor coupled to the memory, wherein the processor is configured with processor-executable instructions to perform operations comprising;

selecting, using the processor, a signal bandwidth for the NCT;

selecting, using the processor, a CRS pattern of PRBs for a transmission of the CRS in the signal bandwidth, wherein the signal bandwidth includes PRBs with CRS and PRBs without CRS; and

selecting, using the processor, a CRS periodicity for a transmission of the CRS in the time domain.

18. The node device of claim 17, wherein the processor is further configured with processor-executable instructions to perform operations comprising:

rotating between a set of CRS distribution patterns in the frequency domain based on a subframe index in the time domain.

19. The node device of claim 17, wherein the processor is further configured with processor-executable instructions to perform operations comprising:

determining a total number of antenna ports available for a CRS transmission; and

selecting a reduced number of antenna ports for the CRS transmission less than the total number of antenna ports.

20. The node device of claim 17, wherein the processor is further configured with processor-executable instructions to perform operations comprising:

removing a cell-specific frequency shifting of the CRS for the NCT.

21. The node device of claim 17, wherein the processor is further configured with processor-executable instructions to perform operations comprising:

transmitting an indication to a user equipment (UE) of the CRS pattern, wherein the UE includes at least one of an antenna, a touch sensitive display screen, a speaker, a microphone, a graphics processor, an application processor, internal memory, a non-volatile memory port, and combinations thereof; and

transmitting the PRBs in the signal bandwidth on a specified antenna port at a specified CRS periodicity, wherein the NCT is a non-stand alone NCT or a stand-alone NCT.

22. A node device operable in an evolved Node B (eNB) to select physical resource blocks (PRB) for cell-specific reference signal (CRS) transmission for a new carrier type (NCT), the node device comprising:

a memory;

a processor coupled to the memory, wherein the processor is configured with processor-executable instructions to perform operations comprising;

selecting, using the processor, a signal bandwidth for the NCT;

selecting, using the processor, a CRS pattern of PRBs for a transmission of the CRS in the signal bandwidth, wherein the signal bandwidth includes PRBs with CRS and PRBs without CRS;

determining a total number of antenna ports available for a CRS transmission; and

selecting a reduced number of antenna ports for the CRS transmission less than the total number of antenna ports.

23. The node device of claim 22, wherein the processor is further configured with processor-executable instructions to perform operations comprising:

rotating between a set of CRS distribution patterns in the frequency domain based on a subframe index in the time domain.

24. The node device of claim 22, wherein the processor is further configured with processor-executable instructions to perform operations comprising:

transmitting an indication to a user equipment (UE) of the CRS pattern, wherein the UE includes at least one of an antenna, a touch sensitive display screen, a speaker, a microphone, a graphics processor, an application processor, internal memory, a non-volatile memory port, and combinations thereof; and

transmitting the PRBs in the signal bandwidth on a specified antenna port at a specified CRS periodicity, wherein the NCT is a non-stand alone NCT or a stand-alone NCT.

25. A node device operable in an evolved Node B (eNB) to select physical resource blocks (PRB) for cell-specific reference signal (CRS) transmission for a new carrier type (NCT), the node device comprising:

a memory;

a processor coupled to the memory, wherein the processor is configured with processor-executable instructions to perform operations comprising;

selecting, using the processor, a signal bandwidth for the NCT;

selecting, using the processor, a CRS pattern of PRBs for a transmission of the CRS in the signal bandwidth, wherein the signal bandwidth includes PRBs with CRS and PRBs without CRS; and

rotating between a set of CRS distribution patterns in the frequency domain based on a subframe index in the time domain.

26. The node device of claim 25, wherein the processor is further configured with processor-executable instructions to perform operations comprising:

transmitting an indication to a user equipment (UE) of the CRS pattern, wherein the UE includes at least one of an antenna, a touch sensitive display screen, a speaker, a microphone, a graphics processor, an application processor, internal memory, a non-volatile memory port, and combinations thereof; and

transmitting the PRBs in the signal bandwidth on a specified antenna port at a specified CRS periodicity, wherein the NCT is a non-stand alone NCT or a stand-alone NCT.