Relay UE D2D Data Differentiation via Time Sequence Signaling
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Solution Overview
Problem
In LTE D2D ProSe systems, relay UE faces challenges in distinguishing between different data transmissions due to the lack of time sequence information, leading to impaired communication when multiple data pieces are relayed.
Innovation Solution
A method where the transmission device determines information attributes such as transmission layer, priority, or source for received data, allowing relay UE to differentiate between data pieces and maintain normal D2D communication by using redundancy parity bits and CRC masks to indicate these attributes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If relay UE receives multiple data pieces with the same destination address in SA resources, then the relay UE can extend transmission distance and enable more users to access D2D communication, but the relay UE cannot distinguish the time sequence relationship between different data pieces, leading to inability to differentiate and relay data correctly
Solution Approach 1:
The transmitting UE performs preliminary action by adding a time sequence number to the scheduling signaling before transmission. This allows the relay UE to distinguish different data pieces in advance, preventing confusion and enabling correct sequential relaying of multiple data pieces with the same destination address.
Solution Approach 2:
A time sequence number is introduced as an intermediary element in the scheduling signaling. This intermediary carries time sequence information without affecting the original destination address, enabling the relay UE to differentiate between multiple data pieces while maintaining the intended communication path.
2Device complexity
If the UE sends scheduling signaling with destination address only, then the signaling structure remains simple and transmission overhead is reduced, but the relay UE lacks sufficient information to determine the correct relay sequence and distinguish between multiple data pieces
Solution Approach 1:
The scheduling signaling is segmented to include separate fields: destination address field and time sequence number field. This segmentation allows the signaling to carry both the original destination information and the additional time sequence information needed for proper relay operation, without significantly increasing overall complexity.
Solution Approach 2:
The solution adds another dimension (time sequence number) to the existing signaling structure. Instead of modifying the fundamental destination address field, a new dimension is added that provides temporal ordering information, enabling data differentiation while keeping the original addressing mechanism intact.
Data Source
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AI summary
Embodiments of the present invention relate to the communications field, and provide an information transmission method, a device, and a system, so that relay UE can distinguish received data, so as to implement normal D2D communication. The method includes: receiving, by a transmission device, at least one piece of first information; determining, by the transmission device, an information attribute of corresponding information of each of the at least one piece of first information; and determining, by the transmission device, second information according to the information attribute of the corresponding information of each of the at least one piece of first information. The embodiments of the present invention are used for device to device D2D communication.