Partially synchronized multilateration or trilateration method and system for positional finding using RF
Systems and methods for determining a location of one or more user equipment (UE) in a wireless system can comprise receiving reference signals via a location management unit having two or more co-located channels, wherein the two or more co-located channels are tightly synchronized with each other and utilizing the received reference signals to calculate a location of at least one UE among the one or more UE. Embodiments include multichannel synchronization with a standard deviation of less than or equal 10 ns. Embodiments can include two LMUs, with each LMU having internal synchronization, or one LMU with tightly synchronized signals.
1. A method for a determination of a location of a user equipment (UE) in a wireless system including a plurality of nodes, the method comprising:
receiving at a locate server unit (LSU) interfaced through an application programming interface (API) with the wireless system including the plurality of nodes a snap-shot of signals received by the UE, the snap-shot including available reference signals including time advance (TA) measurements, position reference signals (PRS), and one or more of cell-specific reference signals (CRS) and sounding reference signals (SRS) in a digital format, wherein the LSU is part of a parallel wireless locate infrastructure that includes at least one network signal acquisition unit (NSAU), the LSU configured to collect data from the at least one NSAU;
determining, at the LSU, the location of the UE based on the snap-shot; and
sending the location to a requesting entity.
2. The method of claim 1 , wherein the available reference signals include non-positioning specific reference signals when non-positioning specific reference signals are available.
3. The method of claim 2 , wherein the available reference signals determine a mode of operation of the UE within the wireless system, and wherein the snap-shot is based on the mode of operation.
4. The method of claim 1 wherein each node among the plurality of nodes is configured to communicate with the LSU.
5. The method of claim 1 , wherein the wireless system further includes an E-SMLC server configured to communicate with the LSU.
6. The method of claim 1 , wherein the LSU is configured to support location consistency multilateration and location consistency algorithms to generate the location.
7. The method of claim 1 , wherein the wireless system includes functionality of one or more of a SUPL server, an E-SMLC server, and a LCS (LoCation Services) system, and wherein determining includes using one or more of the SUPL server, the E-SMLC server, and the LCS (LoCation Services) system to determine the location of the UE.
8. The method of claim 1 , wherein the snap-shot is in one of a time domain, a frequency domain, and a resource element.
9. The method of claim 1 , wherein the snap-shot is further based on network parameters including one or more of hearability, throughput, compatibility, and emitter IDs.