Systems and methods for configuring remote radio heads

• US 8,570,971 B2
• Filed: 05/03/2012
• Issued: 10/29/2013
• Est. Priority Date: 05/06/2011
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Bhattad, Kapil, Gaal, Peter
• Primary Examiner(s): HAN, CLEMENCE S
• Application Number:
  US13/463,663
• Publication Number:
  US 20130021986A1
• Time in Patent Office: 544 Days
• Field of Search: None
• US Class Current: 370/329
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 72/0466 the resource being a scrambling code
• CPC Class Codes: H04W 88/085 Access point devices with remote components

Abstract

In a method of wireless communication, a UE receives a configuration parameter for scrambling or descrambling a signal for which a larger number of scrambling sequences are defined for a particular cell ID for UEs of a newer release. The UE communicates in a network having a base station and remote radio head(s) based on the received configuration parameter.

Claims

1. A method of wireless communication, comprising:

receiving a configuration parameter for scrambling or descrambling a signal for which a larger number of scrambling sequences are defined for a particular cell ID for UEs of a newer release; and

communicating in a network including a base station and at least one remote radio head (RRH), based at least in part on the received configuration parameter.

2. The method of claim 1, in which the received configuration parameter includes:

a cell identification different from the cell identification of the base station;

a physical uplink control channel offset value;

or

a user equipment (UE) specific parameter.

3. The method of claim 1, in which the received configuration parameter is a UE-RS (reference signal) scrambling sequence;

and in which the communicating further comprises decoding a received signal based-on the UE-RS.

4. The method of claim 1, in which a remote radio head (RRH) has a cell identification different from the base station, and in which the configuration parameter is a cell ID of the remote radio head.

5. The method of claim 4, in which the communicating comprises scrambling an uplink data transmission, uplink demodulation reference signal and/or sounding reference signals (SRSs) based at least in part on the cell ID of the RRH.

6. The method of claim 4, in which the communicating comprises descrambling a downlink demodulation reference signal, a downlink channel state information reference signal (CSI-RS), a user equipment reference signal (UE-RS) and/or a downlink data transmission based at least in part on the cell ID of the RRH.

7. The method of claim 1, in which the configuration parameter comprises resource partitioning information, and in which the communicating further comprises transmitting sounding reference signals (SRSs), control channels and/or data channels based at least in part on the resource partitioning information.

8. The method of claim 1, in which the configuration parameter is received at least in part using radio resource control (RRC) signaling.

9. The method of claim 1, in which the configuration parameter is received at least in part through downlink and uplink grants.

10. The method of claim 1, in which a UE is configured to use a particular scrambling sequence based on a remote radio head (RRH) with which it is associated.

11. The method of claim 10, in which the received configuration parameter comprises a scrambling sequence corresponding to a cell ID of the associated remote radio head.

12. The method of claim 11, in which the communicating further comprises communicating using the scrambling sequence corresponding to the associated remote radio head.

13. The method of claim 1, in which the signal is a channel state information reference signal (CSI-RS), a user equipment reference signal (UE-RS) for data demodulation, a UE-RS for downlink control demodulation, downlink data, downlink control, a sounding reference signal (SRS), a demodulation reference signal (DM-RS) for uplink demodulation, a DM-RS for uplink control, uplink control, and/or uplink data.

14. An apparatus for wireless communication, comprising:

a memory; and

at least one processor coupled to the memory, the at least one processor being configured;

to receive a configuration parameter for scrambling or descrambling a signal for which a larger number of scrambling sequences are defined for a particular cell ID for UEs of a newer release; and

to communicate in a network including a base station and at least one remote radio head (RRH), based at least in part on the received configuration parameter.

15. The apparatus of claim 14, in which the received configuration parameter includes:

a cell identification different from the cell identification of the base station;

a physical uplink control channel offset value;

or

a user equipment (UE) specific parameter.

16. The apparatus of claim 14, in which the received configuration parameter is a UE-RS (reference signal) scrambling sequence;

and in which the communicating further comprises decoding a received signal based-on the UE-RS.

17. The apparatus of claim 14, in which a remote radio head (RRH) has a cell identification different from the base station, and in which the configuration parameter is a cell ID of the remote radio head.

18. The apparatus of claim 17, in which the processor is further configured to communicate by scrambling an uplink data transmission, uplink demodulation reference signal and/or sounding reference signals (SRSs) based at least in part on the cell ID of the remote radio head (RRH).

19. The apparatus of claim 17, in which the processor is further configured to communicate by descrambling a downlink demodulation reference signal, a downlink channel state information reference signal (CSI-RS), a user equipment reference signal (UE-RS) and/or a downlink data transmission based at least in part on the cell ID of the RRH.

20. The apparatus of claim 14, in which the configuration parameter comprises resource partitioning information, and in which the communicating further comprises transmitting sounding reference signals (SRSs), control channels and/or data channels based at least in part on the resource partitioning information.

21. The apparatus of claim 14, in which the configuration parameter is received at least in part using radio resource control (RRC) signaling.

22. The apparatus of claim 14, in which the configuration parameter is received at least in part through downlink and uplink grants.

23. The apparatus of claim 14, in which a UE is configured to use a particular scrambling sequence based on a remote radio head (RRH) with which it is associated.

24. The apparatus of claim 23, in which the received configuration parameter comprises a scrambling sequence corresponding to a cell ID of the associated remote radio head.

25. The apparatus of claim 24, in which the processor is further configured to communicate using the scrambling sequence corresponding to the associated remote radio head.

26. The apparatus of claim 14, in which the signal is a channel state information reference signal (CSI-RS), a user equipment reference signal (UE-RS) for data demodulation, a UE-RS for downlink control demodulation, downlink data, downlink control, a sounding reference signal (SRS), a demodulation reference signal (DM-RS) for uplink demodulation, a DM-RS for uplink control, uplink control, and/or uplink data.

27. A computer program product for wireless communication in a wireless network, comprising:

a non-transitory computer-readable medium having non-transitory program code recorded thereon, the program code comprising;

program code to receive a configuration parameter for scrambling or descrambling a signal for which a larger number of scrambling sequences are defined for a particular cell ID for UEs of a newer release; and

program code to communicate in a network including a base station and at least one remote radio head (RRH), based at least in part on the received configuration parameter.

28. An apparatus for wireless communication, comprising:

means for receiving a configuration parameter for scrambling or descrambling a signal for which a larger number of scrambling sequences are defined for a particular cell ID for UEs of a newer release; and

means for communicating in a network including a base station and at least one remote radio head (RRH), based at least in part on the received configuration parameter.