V2X Demodulation Reference Sequence Implicit Signaling
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Solution Overview
Problem
In V2X communication systems, the increasing size of the communication system leads to a significant increase in the quantity of indication information needed for resource configuration, severely affecting data communication efficiency due to the large resources occupied by this information.
Innovation Solution
A communication method that implicitly transmits indication information of a control channel, allowing the first terminal apparatus to generate a demodulation reference sequence based on the aggregation level of the second control channel, enabling the second terminal apparatus to learn the aggregation level without explicit signaling, thereby reducing the amount of information and resources required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If explicit signaling is used to transmit indication information of control channel and data channel, then communication reliability is improved, but resource consumption increases significantly
Solution Approach 1:
The patent extracts the aggregation level information from the control channel and embeds it into the demodulation reference sequence. By taking out this information and hiding it within the reference sequence, the system eliminates the need for separate explicit signaling while maintaining communication reliability.
Solution Approach 2:
The demodulation reference sequence is given multiple functions: it serves both as a reference for demodulation and as a carrier for aggregation level indication. This multi-functionality reduces the need for separate signaling resources while ensuring reliable communication.
2Reliability
If the V2X communication system size increases to ensure communication quality, then communication quality is improved, but the quantity of indication information increases exponentially
Solution Approach 1:
The patent merges the aggregation level indication with the demodulation reference sequence. By combining these two elements, the system reduces the total quantity of information that needs to be transmitted while maintaining communication quality in expanded V2X systems.
Solution Approach 2:
The demodulation reference sequence acts as an intermediary that carries hidden aggregation level information. This intermediary mechanism allows the system to convey necessary control information without increasing the explicit signaling overhead, thus managing information loss in large-scale V2X communications.
3Reliability
If a large quantity of resources are configured for different participants, then communication quality is ensured, but data communication efficiency is severely affected
Solution Approach 1:
The patent changes the parameter of information transmission from explicit signaling to implicit embedding within the demodulation reference sequence. This parameter change reduces the resource consumption while maintaining communication quality, thereby improving data communication efficiency.
Data Source
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AI summary
This application provides a communication method and apparatus, so that a quantity of pieces of indication information that needs to be transmitted and a quantity of resources occupied by the indication information can be reduced, thereby improving communication efficiency. The communication method and apparatus may be used for the internet of vehicles, for example, V2X, LTE-V, and V2V. The method includes: A first terminal apparatus generates, based on indication information such as an aggregation level of a control channel or a demodulation reference sequence configuration of a data channel, a demodulation reference sequence of another control channel, and sends the demodulation reference sequence to a second terminal apparatus. The second terminal apparatus can obtain the indication information in a process of detecting the demodulation reference sequence of the another control channel, to demodulate the control channel or the data channel.