# US 8,570,971 B2 · Systems and methods for configuring remote radio heads > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,570,971 B2 - Document ID: US8570971B2 - Status: Granted - Kind: B2 - Application number: 13/463,663 - Filed: 2012-05-03 - Published: 2013-01-24 - Granted: 2013-10-29 - Earliest claimed: 2011-05-06 - Assignees: QUALCOMM Incorporated - Applicants: Kapil Bhattad; Peter Gaal - Inventors: Kapil Bhattad; Peter Gaal - Web page: https://patentgrep.com/patent/US8570971B2 ## CPC - H04W 28/18: Negotiating wireless communication parameters - H04W 88/085: {Access point devices with remote components} - H04W 72/0466: {the resource being a scrambling code} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## 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 ### Claim 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. ### Claim 2 (depends on 1) 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. ### Claim 3 (depends on 1) 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. ### Claim 4 (depends on 1) 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. ### Claim 5 (depends on 4) 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. ### Claim 6 (depends on 4) 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. ### Claim 7 (depends on 1) 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. ### Claim 8 (depends on 1) The method of claim 1, in which the configuration parameter is received at least in part using radio resource control (RRC) signaling. ### Claim 9 (depends on 1) The method of claim 1, in which the configuration parameter is received at least in part through downlink and uplink grants. ### Claim 10 (depends on 1) 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. ### Claim 11 (depends on 10) 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. ### Claim 12 (depends on 11) The method of claim 11, in which the communicating further comprises communicating using the scrambling sequence corresponding to the associated remote radio head. ### Claim 13 (depends on 1) 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. ### Claim 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. ### Claim 15 (depends on 14) 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. ### Claim 16 (depends on 14) 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. ### Claim 17 (depends on 14) 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. ### Claim 18 (depends on 17) 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). ### Claim 19 (depends on 17) 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. ### Claim 20 (depends on 14) 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. ### Claim 21 (depends on 14) The apparatus of claim 14, in which the configuration parameter is received at least in part using radio resource control (RRC) signaling. ### Claim 22 (depends on 14) The apparatus of claim 14, in which the configuration parameter is received at least in part through downlink and uplink grants. ### Claim 23 (depends on 14) 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. ### Claim 24 (depends on 23) 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. ### Claim 25 (depends on 24) 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. ### Claim 26 (depends on 14) 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. ### Claim 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. ### Claim 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.