# US 9,521,646 B2 · Positioning location for remote radio heads (RRH) with same physical cell identity (PCI) > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,521,646 B2 - Document ID: US9521646B2 - Status: Granted - Kind: B2 - Application number: 14/940,086 - Filed: 2015-11-12 - Published: 2016-03-10 - Granted: 2016-12-13 - Earliest claimed: 2011-02-22 - Assignees: QUALCOMM Incorporated - Applicants: Qualcomm Incorporated - Inventors: Tingfang Ji; Ravi Palanki; Peter Gaal; Hao Xu; Yongbin Wei - Web page: https://patentgrep.com/patent/US9521646B2 ## CPC - H04W 64/00: Locating users or terminals {or network equipment} for network management purposes, e.g. mobility management - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04W 24/02: Arrangements for optimising operational condition - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/20: Control channels or signalling for resource management - G01S 1/20: using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 88/085: {Access point devices with remote components} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES ## Abstract A method of wireless communication includes generating a unique position reference signal (PRS) for a remote radio head having a same physical cell identity (PCI) as a macro eNodeB. The unique PRS is based on a virtual cell ID and/or unique cell global identification (CGI) of the remote radio head such that the unique PRS is different from a PRS of the macro eNodeB. The PRS of the macro eNodeB is based on the PCI. The method also includes transmitting the unique PRS. ## Claims ### Claim 1 A method of wireless communication, comprising: generating a unique position reference signal (PRS) for a remote radio head having a same physical cell identity (PCI) as a macro eNodeB, the unique PRS being based on at least one of a virtual cell ID and cell global identification (CGI) of the remote radio head such that the unique PRS is different from a PRS of the macro eNodeB, the PRS of the macro eNodeB being based on the PCI; and transmitting the unique PRS to a user equipment located in a region of a cell of the RRH that overlaps with a cell of the macro eNodeB. ### Claim 2 (depends on 1) The method of claim 1, further comprising signaling to a user equipment (UE) that the PRS is based on at least one of the cell global identification or the virtual cell ID. ### Claim 3 (depends on 1) The method of claim 1, further comprising signaling to a user equipment (UE), a position reference signal configuration of a plurality of remote radio heads in neighboring cells when the UE is near a serving cell boundary. ### Claim 4 (depends on 1) The method of claim 1, further comprising receiving uplink transmissions from a user equipment (UE); and determining a position location of the UE based on the received uplink transmissions. ### Claim 5 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 generate a unique position reference signal (PRS) for a remote radio head (RRH) having a same physical cell identity (PCI) as a macro eNodeB, the unique PRS being based on at least one of a virtual cell ID and cell global identification (CGI) of the remote radio head such that the unique PRS is different from a PRS of the macro eNodeB, the PRS of the macro eNodeB being based on the PCI; and to transmit the unique PRS to a user equipment located in a region of a cell of the RRH that overlaps with a cell of the macro eNodeB. ### Claim 6 (depends on 5) The apparatus of claim 5, in which the processor is further configured to signal to a user equipment (UE) that the PRS is based on at least one of the cell global identification or the virtual cell ID. ### Claim 7 (depends on 5) The apparatus of claim 5, in which the processor is further configured to signal to a user equipment (UE), a position reference signal configuration of a plurality of remote radio heads in neighboring cells when the UE is near a serving cell boundary. ### Claim 8 (depends on 5) The apparatus of claim 5, in which the processor is further configured: to receive uplink transmissions from a user equipment (UE); and to determine a position location of the UE based on the received uplink transmissions. ### Claim 9 A non-transitory computer-readable medium having non-transitory program code recorded thereon for wireless communication in a wireless network, the program code being executed by at least one processor and comprising: program code to generate a unique position reference signal (PRS) for a remote radio head (RRH) having a same physical cell identity (PCI) as a macro eNodeB, the unique PRS being based on at least one of a virtual cell ID and cell global identification (CGI) of the remote radio head such that the unique PRS is different from a PRS of the macro eNodeB, the PRS of the macro eNodeB being based on the PCI; and program code to transmit the unique PRS to a user equipment located in a region of a cell of the RRH that overlaps with a cell of the macro eNodeB. ### Claim 10 (depends on 9) The non-transitory computer-readable medium of claim 9, in which the program code further comprises program code to signal to a user equipment (UE) that the PRS is based on at least one of the cell global identification or the virtual cell ID. ### Claim 11 (depends on 9) The non-transitory computer-readable medium of claim 9, in which the program code further comprises program code to signal to a user equipment (UE), a position reference signal configuration of a plurality of remote radio heads in neighboring cells when the UE is near a serving cell boundary. ### Claim 12 (depends on 9) The non-transitory computer-readable medium of claim 9, in which the program code further comprises: program code to receive uplink transmissions from a user equipment (UE); and program code to determine a position location of the UE based on the received uplink transmissions. ### Claim 13 An apparatus for wireless communication, comprising: means for generating a unique position reference signal (PRS) for a remote radio head (RRH) having a same physical cell identity (PCI) as a macro eNodeB, the unique PRS being based on at least one of a virtual cell ID and cell global identification (CGI) of the remote radio head such that the unique PRS is different from a PRS of the macro eNodeB, the PRS of the macro eNodeB being based on the PCI; and means for transmitting the unique PRS to a user equipment located in a region of a cell of the RRH that overlaps with a cell of the macro eNodeB. ### Claim 14 (depends on 13) The apparatus of claim 13, further comprising means for signaling to a user equipment (UE) that the PRS is based on at least one of the cell global identification or the virtual cell ID. ### Claim 15 (depends on 13) The apparatus of claim 13, further comprising means for signaling to a user equipment (UE), a position reference signal configuration of a plurality of remote radio heads in neighboring cells when the UE is near a serving cell boundary. ### Claim 16 (depends on 13) The apparatus of claim 13, further comprising: means for receiving uplink transmissions from a user equipment (UE); and means for determining a position location of the UE based on the received uplink transmissions.