Sidelink Beam Pairing Using Control Information
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Solution Overview
Problem
The existing wireless communication systems face inefficiencies in sidelink communication, particularly in beam pairing processes for vehicle-to-everything (V2X) communications, leading to resource wastage and increased delay due to the reliance on synchronization signals for both synchronization and beam pairing operations.
Innovation Solution
A method and apparatus that utilize control information instead of synchronization signals for beam pairing in sidelink communication, allowing for the selection and determination of a proper transmit (TX) beam and receive (RX) beam pair, thereby reducing resource wastage and improving communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If synchronization signals are used for both synchronization and beam pairing operations, then the existing wireless communication systems can maintain compatibility with current protocols, but resource wastage and increased delay occur due to the inefficiency of using synchronization signals for beam pairing
Solution Approach 1:
The patent segments the beam pairing process from synchronization signal transmission by introducing separate control information messages. The transmitting UE sends control information containing beam pairing results through PSCCH/PSSCH channels, while synchronization signals are transmitted separately through PSBCH. This segmentation eliminates the inefficiency of using synchronization signals for beam pairing, reducing resource overhead and improving beam pairing efficiency.
Solution Approach 2:
The patent introduces control information as an intermediary carrier for beam pairing results. Instead of embedding beam pairing information in synchronization signals, the system uses dedicated control information messages transmitted through control channels. This intermediary approach allows efficient transmission of beam pairing data without consuming synchronization signal resources, thereby reducing resource overhead.
2Reliability
If synchronization signals are repeatedly transmitted for beam pairing, then beam pairing can be achieved, but resource wastage occurs due to unnecessary repetition
Solution Approach 1:
The patent performs beam pairing determination in advance through control information exchange before actual data transmission begins. The transmitting UE determines beam pairing results and communicates them to the receiving UE through control information messages. This preliminary action ensures reliable beam pairing is established before communication starts, eliminating the need for repeated synchronization signal transmissions during data transmission.
Solution Approach 2:
The patent enables continuous useful action by establishing beam pairing through control information once, then maintaining that pairing for ongoing communication. Instead of repeatedly transmitting synchronization signals, the system uses the established beam pairing configuration continuously for data transmission, reducing time loss while maintaining reliability.
3Loss of energy
If control information is used for beam pairing instead of synchronization signals, then resource overhead and power consumption are reduced, but the system complexity increases due to the need for separate control information transmission mechanisms
Solution Approach 1:
The patent applies universality by using existing control information channels (PSCCH/PSSCH) for the additional function of beam pairing communication. The same control information infrastructure that carries scheduling and data control messages is also used to transmit beam pairing results. This multi-functionality approach reduces system complexity compared to creating entirely new signaling mechanisms, while still achieving lower power consumption than synchronization signal-based beam pairing.
Data Source
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AI summary
A method and a device for a sidelink in a wireless communication system are provided. A transmission terminal supporting a sidelink performs transmission/reception beam pairing by using control information for a sidelink. The transmission terminal and a reception terminal can find an optimum transmission/reception beam pair on the basis of a method of repeatedly transmitting/receiving control information by the sidelink. Therefore, an appropriate transmission/reception beam pair can be found without repeatedly transmitting a synchronization signal. The reception terminal can provide feedback information on the received control information to the transmission terminal. The transmission terminal can determine an optimum transmission/reception beam pair on the basis of the feedback information.