Group Communication Cell Range Identification
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Solution Overview
Problem
Existing group communication systems in the Internet of Vehicles face inefficiencies in resource utilization due to inaccurate cell range identification, leading to either resource waste or ineffective data transmission, as they either broadcast beyond necessary areas or fail to reach vehicles within the required range.
Innovation Solution
A method where a server determines a first group identifier based on the location information of user equipment, allowing for precise identification of the cell range for broadcasting group communication data, thereby optimizing downlink transmission resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the server broadcasts group communication data in all neighboring cells of the vehicle A, then all vehicles within transmission distance can receive the data, but downlink transmission resources are wasted when cell coverage exceeds the required range
Solution Approach 1:
The patent segments the cell range into multiple sub-ranges based on the actual transmission distance requirement (320 meters). Instead of broadcasting to all neighboring cells, the server identifies and broadcasts only to cells that fall within the required transmission distance, thus segmenting the broadcast target set to eliminate unnecessary resource consumption while ensuring reliable delivery to all vehicles within range
Solution Approach 2:
The patent applies local quality by differentiating between cells based on their distance from the source vehicle. Cells are evaluated individually to determine if they fall within the 320-meter transmission radius, and broadcast resources are allocated selectively to only those cells that require the data, rather than applying a uniform broadcast policy to all neighboring cells
2Loss of energy
If the server limits broadcasting to only the current serving cell, then downlink transmission resources are saved, but vehicles in neighboring cells within transmission distance cannot receive the data
Solution Approach 1:
The patent implements a dynamic cell selection mechanism where the broadcast range is adjusted based on the actual transmission distance requirement and the geometric relationship between cells and the source vehicle. The server dynamically determines which neighboring cells to include in the broadcast by calculating their distances, rather than using a static rule of always broadcasting to all neighboring cells or only the serving cell
3Ease of operation
If the existing solution broadcasts to all neighboring cells regardless of coverage area, then implementation is simple, but it cannot accurately meet the transmission distance requirement
Solution Approach 1:
The patent replaces the simple but imprecise mechanical approach of broadcasting to all neighboring cells with a calculation-based system that uses distance formulas and geometric relationships. The server calculates the distance from the source vehicle to each cell's center point and compares it against the 320-meter threshold, substituting blind broadcasting with precision-based selection
Data Source
AI summary
Embodiments of the present disclosure provide a group communication method, a device, and a group communication system, and relate to the communications field, so as to accurately identify a cell range in which group communication data is to be broadcast and to improve utilization of a downlink transmission resource. The group communication method may include obtaining, by a server, a first group identifier, where the first group identifier is determined based on location information of first user equipment. The method may also include obtaining, by the server, group communication data sent by the first user equipment. Furthermore, the method may include sending, by the server, the group communication data in a cell corresponding to the first group identifier based on the first group identifier.