D2D Unicast Transmission via Independent Resource Segmentation
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Solution Overview
Problem
Current Device to Device (D2D) communication systems primarily support simple broadcast and multicast modes, lacking the capability for unicast mode, which prevents sending different data to different receiving devices and implementing distinct D2D service interactions between various terminal equipment combinations.
Innovation Solution
An end-to-end data transmission method and system that enables a sending terminal to send different data to multiple receiving terminals simultaneously using independent resources, allowing for different D2D service interactions between various terminal device combinations by employing a resource scheduling mechanism and channel state information management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If D2D system implements only broadcast and multicast modes, then system complexity is reduced, but the capability to send different data to different receiving devices is lost
Solution Approach 1:
The patent segments the D2D communication system into multiple independent data sessions, each capable of unicast transmission. The sending terminal device maintains multiple data sessions simultaneously, allowing different data to be sent to different receiving terminal devices through separate transmission paths. This segmentation enables unicast capability while managing complexity through structured session management.
Solution Approach 2:
The patent introduces a new dimension of communication by adding unicast mode to the existing broadcast and multicast modes. This creates a multi-dimensional communication framework where different transmission modes can be selected based on service requirements, thereby enhancing adaptability without fundamentally redesigning the entire system.
2Adaptability or versatility
If multiple data sessions are simultaneously active in D2D UE, then different data can be sent to different receiving devices, but resource scheduling complexity increases
Solution Approach 1:
The patent implements preliminary action by establishing resource allocation mechanisms before multiple data sessions become active. The network device pre-configures resource pools and scheduling parameters for potential data sessions, allowing the sending terminal to quickly establish multiple sessions without complex real-time negotiations. This reduces the instantaneous scheduling complexity while maintaining multi-session capability.
3Speed
If D2D communication is implemented without network device involvement, then transmission speed increases, but control accuracy and reliability decrease
Solution Approach 1:
The patent introduces the network device as an intermediary that provides centralized resource scheduling and control for D2D communication. The network device allocates resources, manages multiple data sessions, and ensures reliable transmission without being directly involved in every data transfer. This mediator approach maintains transmission speed by enabling direct D2D links while improving reliability through network-level coordination.
Data Source
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AI summary
The invention provides a peer-to peer data transmission method, apparatus, and system. The method comprises: a transmitting terminal determines a first time-frequency resource configured to transmit data to a receiving terminal; and the transmitting terminal transmits, on the first time-frequency resource, data to the receiving terminal; wherein the transmitting terminal transmits the data to the receiving terminal while transmitting data to other receiving terminals; the transmitting terminal transmits different data to at least one of the other receiving terminals and the receiving terminal; and/or, the transmitting terminal transmits different data to two or more of the other receiving terminals. The embodiment can implement different D2D service interaction for different terminal apparatus combinations.