Sidelink SCI Filtering for Selective PSSCH Demodulation
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Solution Overview
Problem
In LTE mobile communication systems, sidelink transmission results in high processing energy consumption and waste of processing capacity due to terminals demodulating all received data without differentiation between unicast, multicast, and broadcast, leading to unnecessary processing energy consumption.
Innovation Solution
Implementing a method and apparatus for sidelink information transmission, and a terminal to resolve the problem of high processing energy consumption and waste of processing capacity by allowing terminals to determine, based on sidelink transmission identifiers, whether to receive or demodulate physical sidelink shared channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal demodulates all received sidelink data without differentiation, then all data can be processed, but processing energy consumption increases and processing capacity is wasted
Solution Approach 1:
The patent extracts the transmission type identification information from the sidelink control information (SCI) to enable early determination of whether to process the corresponding physical sidelink shared channel (PSSCH). By taking out this identification feature, the terminal can selectively process only relevant data, avoiding unnecessary demodulation of unrelated unicast, multicast, or broadcast data, thus reducing processing energy consumption while maintaining reliable data reception.
Solution Approach 2:
The patent implements preliminary action by determining the transmission type (unicast, multicast, or broadcast) before demodulating the PSSCH. The terminal first decodes the SCI to obtain transmission type identification, then uses this information to decide whether to proceed with PSSCH demodulation. This preliminary determination prevents wasted processing energy on irrelevant data while ensuring complete reception of intended data.
2Reliability
If the terminal processes all received sidelink data, then no data is missed, but processing capacity is wasted on unnecessary data
Solution Approach 1:
The patent extracts transmission type identification information from the SCI to enable selective processing. By taking out this key identification feature, the terminal can efficiently filter out irrelevant data (such as unicast data not intended for this terminal, or broadcast/multicast data when not in listening mode), improving processing capacity utilization while maintaining complete reception of relevant data through targeted demodulation based on the extracted identification.
Solution Approach 2:
The patent performs preliminary determination of transmission type before PSSCH demodulation by decoding the SCI first. This preliminary action allows the terminal to identify and process only relevant data streams, preventing waste of processing capacity on unnecessary data while ensuring no relevant data is missed. The preliminary identification step optimizes the balance between reception completeness and capacity utilization.
3Device complexity
If sidelink transmission uses broadcast mode without point-to-point connection, then connection establishment is simplified, but the terminal cannot distinguish between different types of PSSCH at physical layer
Solution Approach 1:
The patent introduces transmission type identification information as an intermediary element within the SCI. This intermediary carries differentiation markers that enable the terminal to distinguish between unicast, multicast, and broadcast PSSCH at the physical layer, despite the simplified broadcast-based connection establishment. The intermediary information bridges the gap between simplified connection setup and the need for data type differentiation, allowing selective processing without increasing connection establishment complexity.
Solution Approach 2:
The patent segments the SCI into distinct functional parts, including transmission type identification information that specifically marks the data type. By segmenting the control information in this way, the terminal can quickly identify and process only the relevant portions (unicast, multicast, or broadcast indicators) without needing to analyze the entire data stream, thus enabling physical layer differentiation while maintaining simplified broadcast-based connection establishment.
Data Source
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AI summary
This disclosure discloses a sidelink information transmission method and a terminal. The method includes: receiving sidelink control information SCI; and determining, based on a sidelink transmission identifier indicated by the SCI, whether to receive or demodulate a physical sidelink shared channel PSSCH or not.