Direct Mode Transmission Request and Feedback Mechanism
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Solution Overview
Problem
In shared resource radio communication networks operating in direct mode, there is a risk of collisions during information transmission between mobile terminals, leading to reduced throughput and communication quality due to the lack of effective collision management and synchronization between frequency channels.
Innovation Solution
A method where a transmitting terminal sends a transmission request, and receiving terminals determine acceptance based on predefined selection strategies, including signal-to-noise ratio and priority criteria, to ensure compliance with transmission conditions before allowing information transfer, thereby reducing collision risks and optimizing transmission quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If terminals transmit information directly without monitoring collision, then transmission speed increases, but collision risk increases leading to reduced reliability
Solution Approach 1:
The transmitting terminal sends a transmission request before actually transmitting information. Receiving terminals monitor this request and send back availability signals. This preliminary exchange allows the system to check channel availability and coordinate transmissions in advance, preventing collisions while maintaining direct mode efficiency.
Solution Approach 2:
Receiving terminals provide feedback signals indicating their availability to receive information. The transmitting terminal uses this feedback to determine whether to proceed with transmission. This feedback mechanism enables collision-free communication by ensuring that transmissions only occur when receiving terminals are ready and the channel is clear.
2Reliability
If transmission requests are monitored and coordination is implemented, then collision risk decreases improving reliability, but system complexity and overhead increase
Solution Approach 1:
The transmission process is divided into distinct phases: a request phase where terminals exchange availability information, and a transmission phase where actual data is sent. This segmentation allows the complex coordination task to be broken down into simple, manageable steps that can be implemented efficiently.
Solution Approach 2:
Each terminal autonomously determines its own transmission timing based on the feedback it receives from other terminals. Terminals independently make decisions about when to transmit without requiring centralized control, reducing overall system complexity while maintaining reliability.
3Ease of operation
If frequency channels are dedicated to specific groups, then synchronization is simplified, but resource utilization efficiency decreases
Solution Approach 1:
The system dynamically allocates frequency channels based on real-time availability and transmission needs. Instead of static dedicated channels, terminals can use any channel that is currently available and confirmed through the request-feedback mechanism, optimizing resource utilization while maintaining synchronization through the coordinated protocol.
Data Source
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AI summary
The invention relates to a method for establishing a transmission of information between an emitting mobile terminal (Tki) and at least one receiving mobile terminal (Tki) of the same group of terminals (Gk) pertaining to a shared-resource radiocommunication network (1) operating in a direct mode. The emitting terminal emits (E1) a transmission request (Tx) to inform the other receiving terminals of the group (Gk) of its intention to transmit information to them. Each receiving terminal of the group determines (E3) whether, on the basis of at least one pre-defined selection strategy, it will accept the transmission of information, and if it will, transmits (E4) a return signal (Rx-A) comprising data relating to said emitting terminal to the other terminals of the group. Then, the emitting terminal checks (ES) whether it respects the transmission conditions, and if it does, transmits (E6) said information to the other terminals in its group via at least one resource allocated (∆Fk) to said group.