Positioning reference signal (prs) generation for multiple transmit antenna systems

Patent metadata

Field	Value
Publication number	US-2016334499-A1
Application number	US-201514921836-A
Country	US
Kind code	A1
Filing date	Oct 23, 2015
Priority date	May 12, 2015
Publication date	Nov 17, 2016
Grant date	—

Abstract

Disclosed embodiments pertain to a method of generating a Positioning Reference Signal (PRS) sequence for a system comprising a plurality of physical transmitting antenna elements serving a single cell. In some embodiments, the method may comprise: assigning a distinct Physical Antenna Port (PAP) identifier (ID) to a subset of the plurality of physical transmitting antenna elements; and generating PRS sequences for the subset of the plurality of physical transmitting antenna elements, wherein each PRS sequence corresponds to a physical transmitting antenna element in the subset of the plurality of physical transmitting antenna elements, and each PRS sequence has a corresponding frequency shift based, at least in part, on the PAP ID (h) of the corresponding physical transmitting antenna element.

First claim

What is claimed is:

1 . A processor-implemented method of generating a Positioning Reference Signal (PRS) sequence, the method comprising:
assigning a distinct Physical Antenna Port (PAP) identifier (ID) to each physical transmitting antenna element in a plurality of physical transmitting antenna elements serving a single cell; and generating a plurality of PRS sequences, each PRS sequence in the plurality of PRS sequences corresponding to a distinct physical transmitting antenna element in the plurality of physical transmitting antenna elements, wherein each PRS sequence has a corresponding frequency shift based, at least in part, on a corresponding PAP ID (h) of a corresponding physical transmitting antenna element.

2 . The method of claim 1 , wherein the corresponding frequency shift is based on a corresponding function ƒ(PAP h ) of the corresponding PAP ID (h) of the corresponding physical transmitting antenna element.

3 . The method of claim 2 , wherein generating a plurality of PRS sequences comprises:
setting, for one of the plurality of physical transmitting antenna elements, the corresponding function ƒ(PAP h ) to 0.

4 . The method of claim 2 , wherein the corresponding function ƒ(PAP h ) is based further on a Cell Portion ID, wherein the Cell Portion ID comprises an identifier associated with a geographic portion of the single cell.

5 . The method of claim 1 , wherein the plurality of physical transmitting antenna elements comprise one of:
a Distributed Antenna System (DAS), or small cells.

6 . The method of claim 1 , wherein the plurality of physical transmitting antenna elements are realized using Remote Radio Heads (RRHs).

7 . The method of claim 1 , further comprising:
initiating transmission of Observed Time Difference of Arrival (OTDOA) assistance information for one or more physical transmitting antenna elements of the plurality of physical transmitting antenna elements, wherein, OTDOA assistance information for a physical transmitting antenna element in the one or more physical transmitting antenna elements comprises a corresponding PAP ID (h).

8 . The method of claim 7 , wherein initiating transmission of the OTDOA assistance information comprises:
initiating transmission of the OTDOA assistance information to a User Equipment (UE), in response to received information from the UE indicating a capability to receive the OTDOA assistance information comprising the corresponding PAP ID (h).

9 . An apparatus comprising:
a transceiver, the transceiver capable of transmitting Positioning Reference Signal (PRS) information; and a processor coupled to the transceiver, the processor configured to:
assign a distinct Physical Antenna Port (PAP) identifier (ID) to each physical transmitting antenna element in a plurality of physical transmitting antenna elements serving a single cell; and
generate a plurality of PRS sequences, each PRS sequence in the plurality of PRS sequences corresponding to a distinct physical transmitting antenna element in the plurality of physical transmitting antenna elements, wherein each PRS sequence has a corresponding frequency shift based, at least in part, on a corresponding PAP ID (h) of a corresponding physical transmitting antenna element.

10 . The apparatus of claim 9 , wherein the corresponding frequency shift is based on a corresponding function ƒ(PAP h ) of the corresponding PAP ID (h) of the corresponding physical transmitting antenna element.

11 . The apparatus of claim 10 , to generate a plurality of PRS sequences, the processor is configured to:
set, for one of the plurality of physical transmitting antenna elements, the corresponding function ƒ(PAP h ) to 0.

12 . The apparatus of claim 10 , wherein the corresponding function ƒ(PAP h ) is based further on a Cell Portion ID, wherein the Cell Portion ID comprises an identifier associated with a geographic portion of the single cell.

13 . The apparatus of claim 9 , wherein the plurality of physical transmitting antenna elements comprise one of:
a Distributed Antenna System (DAS), or small cells.

14 . The apparatus of claim 9 , wherein the plurality of physical transmitting antenna elements are realized using Remote Radio Heads (RRHs).

15 . The apparatus of claim 9 , wherein the processor is further configured to:
initiate transmission of the PAP ID (h) as part of Observed Time Difference of Arrival (OTDOA) assistance information for the corresponding physical transmitting antenna element.

16 . The apparatus of claim 15 , wherein to initiate transmission of the OTDOA assistance information, the processor is configured to:
intitiate transmission of the OTDOA assistance information to a User Equipment (UE), in response to received information from the UE indicating a capability to receive the OTDOA assistance information comprising the corresponding PAP ID (h).

17 . A apparatus comprising:
transceiver means capable of transmitting Positioning Reference Signal (PRS) information; and processing means, the processing means comprising:
means for assigning a distinct Physical Antenna Port (PAP) identifier (ID) to each physical transmitting antenna element in a plurality of physical transmitting antenna elements serving a single cell; and
means for generating a plurality of PRS sequences, each PRS sequence in the plurality of PRS sequences corresponding to a distinct physical transmitting antenna element in the plurality of physical transmitting antenna elements, wherein each PRS sequence has a corresponding frequency shift based, at least in part, on a corresponding PAP ID (h) of a corresponding physical transmitting antenna element.

18 . The apparatus of claim 17 , wherein the corresponding frequency shift is based on a corresponding function ƒ(PAP h ) of the corresponding PAP ID (h) of the corresponding physical transmitting antenna element.

19 . The apparatus of claim 18 , wherein means for generating comprises:
means for setting, for one of the plurality of physical transmitting antenna elements, the corresponding function ƒ(PAP h ) to 0.

20 . The apparatus of claim 18 , wherein the corresponding function ƒ(PAP h ) is based further on a Cell Portion ID, wherein the Cell Portion ID comprises an identifier associated with a geographic portion of the single cell.

21 . The apparatus of claim 17 , wherein the plurality of physical transmitting antenna elements comprise one of:
a Distributed Antenna System (DAS), or small cells.

22 . The apparatus of claim 17 , wherein the plurality of physical transmitting antenna elements are realized using Remote Radio Heads (RRHs).

23 . The apparatus of claim 17 , further comprising:
means for initiating transmission of Observed Time Difference of Arrival (OTDOA) assistance information for one or more physical transmitting antenna elements of the plurality of physical transmitting antenna elements, wherein, OTDOA assistance information for a physical transmitting antenna element in the one or more physical transmitting antenna elements comprises a corresponding PAP ID (h).

24 . An article comprising:
a non-transitory computer readable medium comprising instructions to that are executable by a processor to:
assign a distinct Physical Antenna Port (PAP) identifier (ID) to each physical transmitting antenna element in a plurality of physical transmitting antenna elements serving a single cell; and
generate a plurality of Positionin

Assignees

• Qualcomm Inc

Inventors

• Fischer Sven

Classifications

• H04L5/0051

  of dedicated pilots, i.e. pilots destined for a single user or terminal · CPC title

• G01S1/0428 Primary

  Signal details · CPC title

• H04B7/00

  Radio transmission systems, i.e. using radiation field (H04B10/00, H04B15/00 take precedence) · CPC title

• H04L5/0023

  Time-frequency-space · CPC title

• H04B7/024

  Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems · CPC title