D2D Data Packet Transmission via Sub-Packet Segmentation
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Solution Overview
Problem
In device-to-device (D2D) communication systems, the separate transmission of scheduling assignments (SA) and data packets leads to low transmission reliability due to issues like transmission collisions and half duplexing, resulting in errors and failed transmissions.
Innovation Solution
The method involves channel coding a data packet into multiple sub-packets, allocating transmission resources, and generating control information for each sub-packet to indicate its transmission resources, allowing for simultaneous transmission and joint processing to reconstruct the original data packet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If SA and data packet are separately transmitted in different resource pools, then resource allocation flexibility is improved, but transmission reliability deteriorates due to transmission collisions and half duplexing
Solution Approach 1:
The patent merges the transmission of SA and data packet into the same resource pool, allowing them to be transmitted simultaneously on the same time-frequency resources. This eliminates the transmission collisions and half duplexing issues that occur when SA and data are separately transmitted in different resource pools, thereby improving transmission reliability while maintaining resource allocation flexibility through the unified pool structure
2Object-affected harmful factors
If SA and data packet are transmitted at different times, then interference between them is reduced, but transmission reliability deteriorates due to increased vulnerability to transmission collisions
Solution Approach 1:
The patent combines SA and data packet transmission in the same resource pool and allows them to be transmitted at the same time on the same resources. The receive end uses the SA information to identify and correctly receive the corresponding data packet, eliminating the transmission collision vulnerabilities associated with separate time transmission while managing interference through the unified resource allocation mechanism
3Reliability
If data packet is divided into multiple sub-packets and transmitted separately, then transmission robustness is improved, but system complexity increases due to resource allocation and joint processing requirements
Solution Approach 1:
The patent divides the data packet into multiple sub-packets and transmits them separately in the unified resource pool with different time-frequency resources. The receive end uses SA information to identify and perform joint processing on the sub-packets to reconstruct the original data packet. This segmentation approach improves transmission robustness by allowing selective reception and joint processing, while the unified resource pool manages complexity through centralized resource allocation
Data Source
AI summary
The present disclosure provides a data packet transmission method and a device. The method includes: performing, by a transmit end device, channel coding on a to-be-sent data packet, and dividing the coded data packet into at least two data sub-packets; allocating a transmission resource to each data sub-packet; generating control information for each data sub-packet according to transmission resources of the at least two data sub-packets; and sending each data sub-packet and the control information of the data sub-packet on a corresponding transmission resource. A data packet and control information indicating a transmission resource of a data sub-packet are transmitted simultaneously, so that a receive end device can recognize multiple transmissions of a same data packet, and perform joint processing on multiple data sub-packets corresponding to the same data packet to obtain the sent data packet, and data packet transmission reliability is improved.