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HELPS for Emergency Location Service

Hichan Moon  (Professor, Hanyang University)

Location: N259

Date: Monday, March 21

Time: 10:00 am - 10:45 am

Track: 9-1-1 / Control Rooms, Emergency Comms: LMR, LTE, 5G

Format: Power Session

Vault Recording: TBD

We present a hyper-enhanced local positioning system (HELPS), a novel positioning and searching system for emergency location services. In the case of an emergency, first responders are dispatched with portable signal measurement equipment around the estimated location of the emergency caller. Each signal measurement equipment measures the uplink signal from the mobile phone of the caller. The accurate location of the caller's mobile phone is calculated based on measurements. In addition, first responders can efficiently search for the caller based on the received uplink signal strength. Thus, the positioning accuracy in a conventional sense is not a limitation for first responders in finding the caller. HELPS can provide emergency location information even in environments where global positioning system (GPS) or wireless fidelity (Wi-Fi) does not work. Furthermore, for HELPS operation, no hardware change or software installation is required on the caller's mobile phone. To prove the concept of HELPS, a testbed was built using commercial base station and mobile phone. It is demonstrated that the HELPS testbed can find the room (and the building) where a caller's phone is located.


- HELPS, a novel positioning system is presented for emergency rescue.
- HELPS is not limited by accuracy.
- HELPS does not require any HW/SW modification from E911 caller.
- Accurate positioning for E911 caller is possible within cellular coverage.