D2D Relay Selection Using Mobility Data to Reduce Interference
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Solution Overview
Problem
In device-to-device (D2D) communication, multi-hop broadcast methods often face issues such as information redundancy, channel contention, and collision interference due to overlapping broadcast ranges and inadequate coverage.
Innovation Solution
A method that involves a first apparatus obtaining broadcast decision information, including mobility information, to determine suitable relay terminals within a specific transmission range, thereby optimizing relay selection and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multi-hop broadcast is used to extend transmission range, then broadcast coverage is improved, but information redundancy and channel contention increase
Solution Approach 1:
The patent applies local quality by making relay selection decisions at each terminal device based on local broadcast decision information (including mobility information and location data). Each terminal independently determines whether to act as a relay for specific data, creating localized, intelligent relay decisions rather than uniform broadcast behavior across all devices. This reduces redundant relaying while maintaining coverage.
Solution Approach 2:
The patent changes the parameter of relay selection by introducing broadcast decision information that includes mobility information and location parameters. Terminals use these parameters to dynamically determine relay status, transforming the static broadcast approach into a dynamic one where relay participation is adjusted based on terminal mobility patterns and spatial distribution, thereby reducing information redundancy.
2Area of stationary object
If multi-hop broadcast is used to extend transmission range, then broadcast coverage is improved, but collision interference increases
Solution Approach 1:
The patent applies local quality by enabling each terminal device to independently evaluate local conditions (broadcast decision information, mobility patterns, location) and make localized relay decisions. This distributed, location-aware relay selection reduces the probability of multiple terminals simultaneously transmitting on overlapping channels, thereby minimizing collision interference while maintaining extended coverage.
Solution Approach 2:
The patent applies preliminary action by having terminals pre-obtain and process broadcast decision information including mobility information before engaging in relay operations. This advance preparation allows terminals to predict potential interference scenarios and adjust relay behavior proactively, reducing collision interference before it occurs.
3Device complexity
If relay terminals are selected without considering location information, then device complexity is reduced, but broadcast coverage requirement cannot be satisfied
Solution Approach 1:
The patent applies self-service by enabling terminal devices to autonomously obtain broadcast decision information and independently determine their relay status based on local conditions (mobility information, location data). Each terminal serves itself in the relay selection process without requiring complex centralized control, thereby maintaining low device complexity while achieving satisfactory broadcast coverage through distributed intelligence.
Solution Approach 2:
The patent applies segmentation by dividing the broadcast coverage area into multiple zones and assigning different terminals to serve as relays in different spatial segments based on their location information and mobility patterns. This spatial segmentation of relay functions allows the system to achieve comprehensive coverage without requiring any single terminal to handle the entire coverage area, reducing individual device complexity.
Data Source
AI summary
The present invention discloses a broadcast method, an apparatus, and a system. According to a solution provided in embodiments of the present invention, a broadcast decision apparatus obtains broadcast decision information of a plurality of terminals, where the broadcast decision information includes at least location information of the terminals. The broadcast decision apparatus selects some terminals from the plurality of terminals as relay terminals based on the broadcast decision information and a transmission range of data, and sends configuration information to the relay terminals to indicate the relay terminals to broadcast the data. The solution may be applied to a multi-hop broadcast scenario in vehicle to