18265176. SEARCH APPARATUS, AGGREGATION APPARATUS, SEARCH SYSTEM, SEARCH METHOD, AND NON-TRANSITORY COMPUTER READABLE MEDIUM simplified abstract (NEC Corporation)
SEARCH APPARATUS, AGGREGATION APPARATUS, SEARCH SYSTEM, SEARCH METHOD, AND NON-TRANSITORY COMPUTER READABLE MEDIUM
Organization Name
Inventor(s)
SEARCH APPARATUS, AGGREGATION APPARATUS, SEARCH SYSTEM, SEARCH METHOD, AND NON-TRANSITORY COMPUTER READABLE MEDIUM - A simplified explanation of the abstract
This abstract first appeared for US patent application 18265176 titled 'SEARCH APPARATUS, AGGREGATION APPARATUS, SEARCH SYSTEM, SEARCH METHOD, AND NON-TRANSITORY COMPUTER READABLE MEDIUM
Simplified Explanation
The search apparatus described in the abstract is a system that can calculate the approximate position of a terminal by analyzing the time difference between when a communication request signal is transmitted and when it is received at multiple sites. This is achieved using Observed Time Difference Of Arrival (OTDOA) based on the time differences at different sites.
- The transmission unit transmits a communication request signal to the terminal at multiple sites.
- The reception unit receives a response signal from the terminal, including the time of reception of the communication request signal.
- The calculation unit calculates the approximate position of the terminal by analyzing the time difference between when the request signal was transmitted and received at different sites using OTDOA.
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- Potential Applications of this Technology
1. Location-based services for mobile devices. 2. Emergency services for locating individuals in distress.
- Problems Solved by this Technology
1. Accurately determining the position of a terminal without relying on GPS. 2. Providing location information in areas where GPS signals may be weak or unavailable.
- Benefits of this Technology
1. Improved accuracy in determining the location of terminals. 2. Enhanced safety and security features for users.
- Potential Commercial Applications of this Technology
- Enhanced Location Services for Mobile Devices
- Potential Commercial Applications of this Technology
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- Possible Prior Art
There are existing technologies that use OTDOA for location tracking in cellular networks. For example, some mobile network operators use similar techniques to locate mobile devices for emergency services.
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- Unanswered Questions
- How does this technology handle situations where there is interference in the signal transmission?
The abstract does not provide information on how the system deals with signal interference that may affect the accuracy of the calculated position.
- What is the range limitation of this technology in terms of accurately determining the position of the terminal?
The abstract does not specify the range within which the system can accurately calculate the position of the terminal based on the time differences at different sites.
Original Abstract Submitted
A search apparatus according to the present disclosure includes a transmission unit configured to transmit, at a plurality of sites, a first communication request signal to a terminal; a reception unit configured to receive, from the terminal, a first response signal to the first communication request signal; and a calculation unit configured to calculate an approximate position of the terminal, in which the reception unit receives the first response signal including a time of reception of the first communication request signal by the terminal, and the calculation unit calculates a time difference obtained from a time when the first communication request signal is transmitted and a time when the first communication request signal is received, and calculates the approximate position of the terminal using Observed Time Difference Of Arrival (OTDOA) obtained based on a time difference at at least two of a plurality of sites.
