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

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 K 1 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.