SSB Position Determination for 480 kHz and 960 kHz Sub-Carrier Spaces
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Solution Overview
Problem
The New Radio (NR) communication system lacks specifications for the OFDM symbol index value of SSB positions in scenarios with sub-carrier spaces of 480 kHz and 960 kHz, limiting the determination of SSB positions in these scenarios.
Innovation Solution
A method and apparatus for determining the actual transmission position of SSBs in a radio frame, where SSB positions are spaced by at least one OFDM symbol, and at least one slot includes two SSB positions, with specific OFDM symbol index values defined for different sub-carrier spaces, enabling accurate positioning for both network devices and terminal devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the NR standard specifies SSB positions for certain sub-carrier spaces, then the determination of SSB positions is clear for those scenarios, but the system lacks adaptability to handle larger sub-carrier spaces (480 kHz and 960 kHz)
Solution Approach 1:
The patent applies parameter changes by introducing different OFDM symbol index value ranges corresponding to different sub-carrier space configurations. For sub-carrier spaces of 480 kHz and 960 kHz, the patent defines new OFDM symbol index ranges (e.g., 0-11 for 480 kHz, 0-5 for 960 kHz) rather than using the traditional fixed ranges. This allows the system to adapt to larger sub-carrier spaces while maintaining clear determination rules for SSB positions.
2Measurement precision
If multiple SSB positions are set in a radio frame with specific spacing, then the system supports flexible beamforming configurations, but the terminal device's ability to accurately determine the actual transmission position is limited without additional indication information
Solution Approach 1:
The patent introduces indication information as an intermediary element that bridges the gap between the network device's SSB position configuration and the terminal device's position determination. The indication information explicitly conveys the actual transmission position to the terminal device, eliminating ambiguity when multiple SSB positions are configured in the radio frame with at least one OFDM symbol spacing.
3Productivity
If the system supports at least one slot containing two SSB positions with OFDM symbol spacing, then the productivity of SSB transmission is improved, but the difficulty of detecting and measuring the actual position increases
Solution Approach 1:
The patent applies preliminary action by having the network device send indication information about the actual transmission position before the terminal device attempts to detect and measure the SSB. This advance provision of position information simplifies the terminal device's detection process, as it can directly search for SSBs at the indicated positions rather than performing blind detection across multiple possible positions within the same slot.
Data Source
AI summary
A method, device and computer readable medium for determining an Synchronization Signal Block (SSB) position. The SSB position is determined by determining an actual transmission position of a target SSB according to various SSB positions being set in a radio frame; and sending indication information of the actual transmission position to a terminal device, wherein the various SSB positions being set in the radio frame are spaced from each other by at least one OFDM symbol, and at least one slot in the radio frame comprises two SSB positions.