Beam-Specific Synchronization Signal Block Positions for Wireless Networks
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Solution Overview
Problem
In wireless communication systems, especially in unlicensed spectrum, the listen-before-talk (LBT) requirement can prevent base stations from transmitting synchronization signal blocks for certain beams, leading to challenges in user equipment (UE) performing time and frequency synchronization and beam-specific operations.
Innovation Solution
The base station determines if it cannot transmit a synchronization signal block via a beam-specific position and instead transmits it via a non-beam-specific synchronization signal block position after performing a listen-before-talk assessment, and provides control information indicating the transmission via this alternate position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station transmits synchronization signal blocks via beam-specific synchronization signal block positions, then beam-specific operations and time-frequency synchronization are improved, but the transmission may be blocked due to LBT requirements in unlicensed spectrum
Solution Approach 1:
The patent applies universality by introducing non-beam-specific synchronization signal block positions that can serve multiple beams simultaneously. When LBT blocks beam-specific transmissions, the base station transmits synchronization signal blocks on non-beam-specific positions that are not associated with any particular beam, allowing user equipment from multiple beams to perform time-frequency synchronization using the same resource.
Solution Approach 2:
The patent uses non-beam-specific synchronization signal block positions as an intermediary mechanism. These positions act as a mediator between the LBT constraint and the need for reliable synchronization - when beam-specific positions are blocked by LBT, the intermediary non-beam-specific positions provide an alternative path for synchronization signal transmission.
2Reliability
If the base station uses non-beam-specific synchronization signal block positions to transmit synchronization signal blocks, then transmission reliability is improved when LBT blocks beam-specific positions, but the user equipment cannot perform beam-specific operations
Solution Approach 1:
The patent applies local quality by differentiating between beam-specific and non-beam-specific synchronization signal block positions. Beam-specific positions carry beam identification information for beam-specific operations, while non-beam-specific positions are used when LBT blocks beam-specific transmissions. The system locally adapts the quality and function of synchronization signal block positions based on LBT outcomes.
Solution Approach 2:
The patent changes the parameter of synchronization signal block position association dynamically. When LBT allows, beam-specific positions are used with beam-specific associations. When LBT blocks transmission, the system switches to non-beam-specific positions where the beam association parameter is changed or removed, allowing transmission while accepting the trade-off of lost beam-specific information.
3Adaptability or versatility
If the base station increases the number of beam-specific synchronization signal block positions to support more beams, then beam management capability is improved, but the system complexity and overhead increase
Solution Approach 1:
The patent reduces complexity by introducing universal non-beam-specific synchronization signal block positions that serve all beams. Instead of requiring dedicated beam-specific positions for every beam, the system uses a shared pool of non-beam-specific positions that can be utilized by any beam when needed, reducing the total number of synchronization signal block positions required.
Solution Approach 2:
The patent applies partial action by providing beam-specific synchronization signal block positions only when needed for beam-specific operations, and relying on non-beam-specific positions for general synchronization needs. This partial differentiation reduces the overhead of maintaining full beam-specific positioning for all scenarios while preserving beam management capability when required.
Data Source
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AI summary
A technique may include determining, by a base station in a wireless network, that the base station was unable to transmit a synchronization signal block for a beam via a beam-specific synchronization signal block position that is associated with the beam; transmitting, by the base station in response to the determining, a synchronization signal block for the beam via a non-beam-specific synchronization signal block position; and transmitting, by the base station, control information indicating the transmitting of the synchronization signal block via the non-beam-specific synchronization signal block position.