D2D Subframe Priority Mechanism for Cellular Collision Avoidance
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Solution Overview
Problem
In device-to-device (D2D) communication systems, there is a need to avoid collisions between cellular and D2D discovery transmissions, as they can coincide in the same subframe, leading to interference and reduced system throughput.
Innovation Solution
Implementing a priority and resource splitting mechanism where control information transmission is prioritized over D2D discovery signals, allowing for distinct resource allocation between PUCCH and D2D discovery, and deferring D2D communications or discovery signals to avoid collisions, ensuring efficient multiplexing of subframes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If D2D discovery transmissions and cellular transmissions share the same subframe resources, then resource utilization is improved, but collisions and interference occur reducing system throughput
Solution Approach 1:
The patent segments the subframe resources by introducing a priority field that divides transmissions into high-priority (cellular control information) and low-priority (D2D discovery) categories. This segmentation allows the system to maintain resource sharing while preventing collisions through priority-based allocation, resolving the contradiction between resource utilization and collision avoidance.
2Reliability
If control information transmission is prioritized over D2D discovery signals, then cellular communication reliability is improved, but D2D discovery resource availability decreases
Solution Approach 1:
The patent implements dynamic resource allocation where the priority field can be configured to favor either cellular or D2D transmissions based on system conditions. This dynamic approach allows the network to adjust the balance between control information reliability and D2D discovery throughput, resolving the contradiction by making the priority allocation adaptable rather than fixed.
3Reliability
If distinct resource allocation is implemented between PUCCH and D2D discovery, then collision prevention is improved, but resource flexibility and multiplexing efficiency decrease
Solution Approach 1:
The patent applies preliminary action by pre-configuring priority fields and resource allocation rules before transmissions occur. The network controller预先 establishes the priority framework and collision avoidance mechanisms, allowing devices to automatically follow predefined rules without complex real-time decision-making. This resolves the contradiction by simplifying the actual transmission process through advance planning.
Data Source
AI summary
A device is configured to perform a method of wireless communication in a wireless communication network. The method includes receiving, from a communications controller, a device-to-device (D2D) subframe configuration to communicate with one or more second wireless devices, the subframe configuration indicating one or more subframes in which to transmit a D2D signal or receive one or more D2D signals. The method also includes receiving, from the communications controller, scheduling information to transmit a first signal to the communications controller on a subframe indicated by the D2D subframe configuration. The method further includes prioritizing the transmission of the first signal over a transmission of the D2D signal or a reception of the one or more D2D signals, and transmitting the first signal.