Search

KR-102963221-B1 - Systems and methods for ultra-low latency location services for wireless networks

KR102963221B1KR 102963221 B1KR102963221 B1KR 102963221B1KR-102963221-B1

Abstract

An external client requests the location of the UE using control plane signaling. The UE transmits downlink location measurements, such as reference signal time differences for multiple base stations (BSs), to a serving BS at the Layer 1 or Layer 2 protocol level and at first periodic intervals. The UE and the multiple BSs transmit additional location measurements, such as receive-transmit time differences, to the serving BS at second periodic intervals longer than the first periodic intervals. The serving BS determines timing information, such as real-time differences for the multiple BSs, using the additional location measurements and downlink location measurements. The serving BS determines the location of the UE using the downlink location measurements and timing information at first periodic intervals and transmits the location to the external client using user plane signaling to reduce latency.

Inventors

  • 엣지, 스티븐 윌리엄
  • 아카라카란, 소니
  • 피셔, 스벤

Assignees

  • 퀄컴 인코포레이티드

Dates

Publication Date
20260508
Application Date
20191212
Priority Date
20191211

Claims (20)

  1. A method (900) for locating the UE (105), performed by the UE (user equipment) (105), A step of receiving a request for the location capabilities of the UE (105) from a serving base station (110-1); A step of transmitting the location capabilities of the UE (105) to the serving base station (110-1) — the location capabilities indicate the ability to transmit first location measurements at the L1 (Layer 1) or L2 (Layer 2) protocol level —; Step (902) of receiving a first request for the first location measurements and a second request for the second location measurements from the serving base station (110-1) of the RAN (Radio Access Network) (112); A step (904) of transmitting the first location measurements to the serving base station (110-1) at the L1 or L2 protocol level at first periodic intervals; and The method comprises the step (906) of transmitting the second position measurements to the serving base station (110-1) at second periodic intervals — the first periodic intervals are shorter than the second periodic intervals — and The first location measurements are Reference Signal Time Difference (RSTD) measurements, sensor measurements, or both RSTD and sensor measurements obtained using the interaction between the UE and the serving base station, and The second location measurements are TOA (time of arrival) measurements, Rx-Tx (Receive Time-Transmission Time) measurements, AOA/AOD (Angle of Departure/Angle of Arrival), RTT (round trip signal propagation time) measurements, RSSI (received signal strength indication) measurements, RSRP (reference signal received power) measurements, RSRQ (reference signal received quality) measurements, WiFi AP RTT, WiFi AP RSSI, sensor measurements, or a combination of some of these measurements, obtained using the interaction between the UE, the serving base station, and neighboring base stations. A method (900) for locating the UE (105).
  2. In Article 1, The above L1 or L2 protocol level is, (i) Physical layer; (ii) MAC (Media Access Control) layer; (iii) RLC (Radio Link Control) layer; (iv) PDCP (Packet Data Convergence Protocol) layer; or (v) Some combinations of these including one of A method (900) for locating the UE (105).
  3. In Article 1, The first request for the above first location measurements includes an encryption key, and The above method further comprises the step of encrypting the first location measurements using the encryption key before transmitting the first location measurements to the serving base station (110-1) at the L1 or L2 protocol level. A method (900) for locating the UE (105).
  4. In Article 1, The above RAN (112) is a next-generation Radio Access Network (NG-RAN) that provides 5G NR (New Radio) wireless access to the UE (105), and the serving base station (110-1) is a Serving NR Node B (SgNB) for the UE (105). A method (900) for locating the UE (105).
  5. In Article 1, The above second location measurements are transmitted to the serving base station (110-1) at the RRC (Radio Resource Control) protocol level or at the L1 or L2 protocol level, A method (900) for locating the UE (105).
  6. In Article 1, A step of receiving a third request to transmit UL (uplink) signals from the serving base station (110-1); and The method further includes the step of transmitting the UL (uplink) signals at third periodic intervals, The first periodic intervals are shorter than the third periodic intervals, and The above UL signals enable location measurements of the UE (105) by a plurality of base stations (110) of the RAN (112), and The plurality of base stations (110) include the serving base station (110-1). A method (900) for locating the UE (105).
  7. In Article 6, The above UL signals include positioning reference signals, sounding reference signals, or both. A method (900) for locating the UE (105).
  8. In Article 6, The first request, the second request, and the third request are received in the individual first message, second message, and third message for the RRC (Radio Resource Control) protocol, and The first message, the second message, and the third message are the same message, A method (900) for locating the UE (105).
  9. As a UE (105, 1100) capable of supporting the locating of UE (user equipment) (105, 1100), A wireless transceiver (1102) configured to communicate wirelessly with base stations (110) of a RAN (Radio Access Network) (112); At least one memory (1120); and It includes at least one processor (1104) coupled to the above wireless transceiver (1102) and the above at least one memory (1120), and The above at least one processor (1104) first: Through the wireless transceiver (1102), receive a request for the location capabilities of the UE (105, 1100) from the serving base station (110-1); Through the wireless transceiver (1102), the location capabilities of the UE (105, 1100) are transmitted to the serving base station (110-1) — the location capabilities indicate the ability to transmit first location measurements at the L1 (Layer 1) or L2 (Layer 2) protocol level —; The above wireless transceiver (1102) is configured to receive a first request for the first location measurements and a second request for the second location measurements from the serving base station (110-1) of the RAN (Radio Access Network) (112), and The above at least one processor (1104) then: Through the wireless transceiver (1102), the first location measurements at the L1 or L2 protocol level are transmitted to the serving base station (110-1) at first periodic intervals; and The wireless transceiver (1102) is configured to transmit the second position measurements to the serving base station (110-1) in second periodic intervals, wherein the first periodic intervals are shorter than the second periodic intervals, and The first position measurements are Reference Signal Time Difference (RSTD) measurements, sensor measurements, or both RSTD and sensor measurements obtained using the interaction between the UE and the serving base station, and The second location measurements are TOA (time of arrival) measurements, Rx-Tx (Receive Time-Transmission Time) measurements, AOA/AOD (Angle of Departure/Angle of Arrival), RTT (round trip signal propagation time) measurements, RSSI (received signal strength indication) measurements, RSRP (reference signal received power) measurements, RSRQ (reference signal received quality) measurements, WiFi AP RTT, WiFi AP RSSI, sensor measurements, or a combination of some of these measurements, obtained using the interaction between the UE, the serving base station, and neighboring base stations. UE(105, 1100).
  10. As a non-transient computer-readable storage medium storing program code, The above program code is operable to configure at least one processor (1104) of the UE (105) capable of supporting the locating of the UE (user equipment) (105), and The above-mentioned non-transient computer-readable storage medium is: Program code for receiving a request for location capabilities of the UE (105) from a serving base station (110-1); Program code for transmitting the location capabilities of the above UE (105) to the serving base station (110-1) — said location capabilities indicate the capability to transmit first location measurements at the L1 (Layer 1) or L2 (Layer 2) protocol level —; Program code for receiving a first request for the first location measurements and a second request for the second location measurements from a serving base station (110-1) of the RAN (Radio Access Network) (112); Program code for transmitting the first position measurements to the serving base station (110-1) at the L1 or L2 protocol level at first periodic intervals; and Program code for transmitting the second position measurements to the serving base station (110-1) in second periodic intervals — the first periodic intervals are shorter than the second periodic intervals — and The first position measurements are Reference Signal Time Difference (RSTD) measurements, sensor measurements, or both RSTD and sensor measurements obtained using the interaction between the UE and the serving base station, and The second location measurements are TOA (time of arrival) measurements, Rx-Tx (Receive Time-Transmission Time) measurements, AOA/AOD (Angle of Departure/Angle of Arrival), RTT (round trip signal propagation time) measurements, RSSI (received signal strength indication) measurements, RSRP (reference signal received power) measurements, RSRQ (reference signal received quality) measurements, WiFi AP RTT, WiFi AP RSSI, sensor measurements, or a combination of some of these measurements, obtained using the interaction between the UE, the serving base station, and neighboring base stations. Non-transient computer-readable storage medium.
  11. delete
  12. delete
  13. delete
  14. delete
  15. delete
  16. delete
  17. delete
  18. delete
  19. delete
  20. delete

Description

Systems and methods for ultra-low latency location services for wireless networks [0001] The present application is based on U.S. Provisional Application No. 62/778,852 filed on December 12, 2018, under the title "SYSTEMS AND METHODS FOR LOCATION REPORTING WITH LOW LATENCY FOR FIFTH GENERATION WIRELESS NETWORKS", U.S. Provisional Application No. 62/783,123 filed on December 20, 2018, under the title "SYSTEMS AND METHODS FOR LOCATION REPORTING WITH LOW LATENCY FOR FIFTH GENERATION WIRELESS NETWORKS", U.S. Provisional Application No. 62/805,029 filed on February 13, 2019, under the title "SYSTEMS AND METHODS FOR SUPER LOW LATENCY LOCATION SERVICE FOR FIFTH GENERATION WIRELESS NETWORKS", and Claiming priority to U.S. Provisional Application No. 62/945,664 filed on December 9, 2019, under the title "SYSTEMS AND METHODS FOR LOCATION REPORTING WITH LOW LATENCY FOR WIRELESS NETWORKS", said applications are assigned to the assignee of the present invention, and the entirety thereof is expressly incorporated herein by reference. [0002] The present disclosure generally relates to communication, and more specifically to techniques for supporting location services for user equipment (UEs). [0003] Specific location user cases require very low latency when provisioning the location of a mobile device to an external client. Examples include smart (automated) factories and warehouses that may need to report the positions of tools, objects being manufactured, and packages with less than 10 centimeters (cm) of accuracy and less than 1 second of latency; drones that may need to report an accurate location up to 1 meter within 1 second; public safety emergency responders in dangerous locations (e.g., inside a burning or partially collapsed building); and user cases involving moving vehicles and pedestrians (known as V2X). Additionally, other user cases involving very high location accuracy may have very low latency requirements due to the rapid degradation of location accuracy for moving objects. For example, even at just 4 mph (normal walking speed), an object will move 1.79 meters in 1 second, and thus the benefit of 1 meter location accuracy will be negated after less than 1 second. [0004] Current location solutions may have latency of 5 to 10 seconds or more, and location solutions for wireless networks are not known to have consistently less than 1 second latency, except for solutions using mobile device-based positioning (wherein the mobile device or the mobile device app is also a client for determined locations). [0005] Methods and techniques for reducing end-to-end latency in determining the location of a UE (user equipment) are described. Since location requests from external clients to the UE may be performed infrequently, they may be supported using control plane signaling. An external client requests the location of the UE using control plane signaling. The UE transmits downlink location measurements, such as reference signal time differences for multiple base stations (BSs), to a serving BS at the Layer 1 or Layer 2 protocol level and in first periodic intervals. The UE and the multiple BSs transmit additional location measurements, such as receive time-transmit time differences, to the serving BS in second periodic intervals longer than the first periodic intervals. The serving BS determines timing information, such as real-time differences for multiple BSs, using the additional location measurements and downlink location measurements. The serving BS determines the location of the UE using the downlink location measurements and timing information in first periodic intervals and transmits the location to the external client using user plane signaling to reduce latency. [0006] In one implementation, a method for locating a UE (user equipment) in a RAN (Radio Access Network) is performed by a location server function located at a serving base station for the UE, comprising: receiving a request to locate the UE — the request to locate the UE is based on a location request initiated by an external client and is received using control plane signaling —; receiving location information from the UE at an L1 (layer 1) or L2 (layer 2) protocol level; calculating the location of the UE using the location information; and transmitting a location report containing the location of the UE to an external client using user plane signaling. [0007] In one implementation, a location server function capable of locating a UE (user equipment) in a Radio Access Network (RAN) to a serving base station is configured to communicate with one or more base stations, one or more network nodes, and one or more UEs in the RAN; at least one memory; and at least one processor coupled to the external interface and at least one memory, wherein the at least one processor is configured to receive a request to locate a UE through the external interface ― the request to locate a UE is based on a location request initiated by an external client and is re