Beam Sweep Timing Indication for Wireless Synchronization Access
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Solution Overview
Problem
In wireless communication systems using high-gain narrow beamforming, the synchronization signal transmission process is inefficient due to the need for multiple transmissions in different directions, leading to inefficient use of radio resources and increased complexity for both the network and user equipment.
Innovation Solution
The method involves transmitting synchronization sequences with timing indications that allow wireless devices to synchronize with the network by determining the precise time of events, such as system access requests, reducing the need for multiple transmissions and improving resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If synchronization signals are transmitted using high-gain narrow beamforming in multiple directions, then coverage and data rates are improved, but transmission time and resource usage increase
Solution Approach 1:
The patent embeds timing indication information within the synchronization signal itself, allowing the UE to determine the time of events (such as random access opportunities) in advance without requiring separate signaling or multiple transmissions. This preliminary provision of timing information resolves the contradiction by enabling the network to transmit synchronization signals efficiently in multiple directions while the UE can immediately know when to respond, thus improving coverage without proportionally increasing transmission time.
2Measurement precision
If multiple synchronization sequences are transmitted at different time points, then synchronization accuracy is improved, but device complexity and resource overhead increase
Solution Approach 1:
The patent makes the synchronization signal serve multiple functions simultaneously: it provides both synchronization information and timing indication information for event determination. By embedding the timing indication within the same synchronization signal structure, the patent avoids the need for separate signaling mechanisms, thereby maintaining synchronization accuracy while reducing device complexity and resource overhead.
3Reliability
If beam sweep procedures are implemented to cover all directions, then system reliability is improved, but initial access complexity increases
Solution Approach 1:
The patent enables the UE to autonomously determine the timing of events (such as random access opportunities) by extracting timing indication information from the received synchronization signal. This self-service capability eliminates the need for complex network coordination or additional signaling procedures, thereby maintaining connection reliability through comprehensive beam coverage while significantly simplifying the initial access procedure for both network and device.
Data Source
AI summary
The present disclosure relates to transmitting synchronization signals and in particular to so called beam sweep. In particular the disclosure relates to methods for providing synchronization using synchronization sequences that are transmitted at different points in time. The disclosure also relates to corresponding devices and computer programs. A method in a network node, for transmitting synchronization sequences of a synchronization signal to one or more receiving wireless devices, comprises determining multiple synchronization sequences, such that each synchronization sequence comprises a respective timing indication, whereby each synchronization sequence enables determination of a time of an event in a receiving wireless device and transmitting the synchronization sequences to the one or more wireless devices, at different points in time.