Relative Location Information in D2D Networks
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Solution Overview
Problem
In Device-to-Device (D2D) networks, user equipment cannot currently obtain the location information of another user equipment, relying solely on methods like GPS or base station positioning, which limits direct communication and resource management.
Innovation Solution
A method where a network device obtains and sends relative location information of one user equipment relative to a reference point, allowing other user equipment to determine the actual location of the first user equipment by combining this information with the reference point's location, using a broadcast channel to reduce data transmission requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If user equipment uses GPS or base station positioning to obtain location information, then the location information of the user equipment itself can be obtained, but the location information of another user equipment cannot be obtained
Solution Approach 1:
The network device acts as an intermediary to obtain and distribute location information. The network device collects location information from user equipment and broadcasts it to other user equipment, enabling indirect acquisition of location data without requiring direct positioning capabilities between user equipment devices.
Solution Approach 2:
The network device obtains location information from user equipment and creates a copy that can be distributed to multiple receivers. This allows the same location information to be shared across the network without requiring each user equipment to independently acquire it through GPS or base station positioning.
2Loss of information
If absolute location coordinates are transmitted between user equipment, then complete location information can be obtained, but data transmission length increases
Solution Approach 1:
The patent extracts only the essential location information (latitude and longitude coordinates) from complete location data and transmits it through the network. By selecting and transmitting only the necessary parameters rather than complete location descriptors, the data transmission length is reduced while maintaining the ability to determine actual locations.
Solution Approach 2:
The patent changes the representation parameters of location data by using standardized coordinate systems (latitude and longitude) and transmitting them in a compact format through the network. This parameter optimization reduces the data size required for transmission while preserving the essential location information needed for D2D communication.
Data Source
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AI summary
The present invention provides a location information obtaining method and a device, and relates to the communications field, so that user equipment can obtain an actual location of another user equipment. The method includes: obtaining, by a network device, location information of a reference point and location information of first user equipment; determining, by the network device, relative location information of the first user equipment relative to the reference point; and sending, by the network device, the location information of the reference point and the relative location information of the first user equipment relative to the reference point. The location information obtaining method and the device provided in the present invention are applied to a D2D network.