Sidelink Beam Training via SL-SSID Negotiation
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Solution Overview
Problem
Current technologies cannot implement sidelink beam training in unicast scenarios like V2V, leading to low data transmission efficiency due to the inability to use sidelink synchronization signal blocks (SL-SSBs) for beam management.
Innovation Solution
A method where a first terminal apparatus requests and negotiates with a second terminal apparatus for an available sidelink synchronization signal identifier (SL-SSID) that is not used within a preset time range or by other terminals in the area, allowing for beam training using determined sidelink synchronization signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sidelink synchronization signal blocks (SL-SSBs) are used for beam management in V2V unicast scenarios, then beam training capability is improved, but SL-SSID collision occurs due to lack of coordination between terminals
Solution Approach 1:
The patent applies preliminary action by having the first terminal apparatus request and obtain an available SL-SSID from the second terminal apparatus before performing beam training. This advance coordination ensures that the SL-SSID is not currently in use by other terminals, preventing collisions that would otherwise occur during the beam training process.
Solution Approach 2:
The patent implements feedback through the negotiation process where the first terminal apparatus requests an available SL-SSID from the second terminal apparatus, and the second terminal apparatus provides feedback information about which SL-SSIDs are currently in use. This feedback mechanism enables the first terminal to select an appropriate SL-SSID that avoids collisions with other terminals.
2Productivity
If SL-SSBs are configured for beam training in sidelink unicast, then data transmission efficiency is improved, but complexity of SL-SSID management increases
Solution Approach 1:
The patent applies self-service by enabling terminal apparatuses to autonomously manage SL-SSID allocation through direct negotiation between the first and second terminals. Each terminal can independently request and obtain available SL-SSIDs without requiring network coordinator intervention, thereby improving data transmission efficiency while keeping the management complexity localized to the communicating terminals rather than the entire network.
Data Source
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AI summary
Embodiments of this application provide a beam training method and a related device. In the method, a first terminal apparatus sends a first message to a second terminal apparatus, where the first message is used to request a first list, the first list includes an identifier of at least one sidelink synchronization signal, and the at least one sidelink synchronization signal is a sidelink synchronization signal that is not used by the second terminal apparatus within a preset time range and/or that is not used by another terminal apparatus within an area in which the second terminal apparatus is located; receives a second message from the second terminal apparatus, where the second message includes the first list; and determines a first sidelink synchronization signal based on the identifier of the at least one sidelink synchronization signal in the first list, where the first sidelink synchronization signal is used for beam training. According to this application, beam training on a sidelink is implemented, thereby improving data transmission efficiency.