SSB Offset Signaling for Radio Frame Header Detection
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Solution Overview
Problem
The introduction of SSB beam-scanning or beam repetition in the NR V2X system results in multiple synchronization signal blocks being transmitted in one synchronization period, necessitating a solution to determine the positions of the radio frame header for synchronization.
Innovation Solution
A method is provided to transmit a first synchronization signal block (SSB) with a physical broadcast channel (PBCH) that includes first information indicating the time-domain position of a second SSB relative to a first position, using preconfigured or DMRS methods, to enable terminals to determine the radio frame header.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If SSB beam-scanning or beam repetition is introduced in NR V2X, then beam measurement and beam selection can be completed, but multiple synchronization signal blocks are transmitted in one synchronization period, making it difficult to determine the position of the radio frame header
Solution Approach 1:
The patent introduces first offset information as an intermediary element that mediates between the multiple SSBs and the radio frame header position. This offset information, carried in the PBCH of the first SSB, provides a reference that allows terminals to calculate the radio frame header position relative to the known SSB position, thus solving the difficulty of determining frame structure in beam-scanning scenarios
Solution Approach 2:
The patent performs preliminary action by pre-configuring the first offset information in the PBCH payload before transmission. This offset information is prepared in advance to indicate the time-domain position relationship between the first SSB and the radio frame header, enabling terminals to quickly determine frame structure without complex search procedures
2Adaptability or versatility
If multiple synchronization signal blocks are transmitted in one synchronization period, then beam-scanning requirements are met, but the complexity of determining positions of radio frame header increases
Solution Approach 1:
The first offset information acts as a mediator that simplifies the relationship between multiple SSBs and the radio frame header. By carrying this offset information in the PBCH of the first SSB, the system provides a straightforward reference that reduces the computational complexity for terminals to determine frame header positions across multiple beam directions
Solution Approach 2:
The patent segments the synchronization process by designating a specific first SSB (with a specific SSB index) as the reference point. This segmentation allows the system to handle multiple SSBs in different beam directions by establishing a clear reference framework, where other SSB positions can be determined relative to this first SSB using the offset information
Data Source
AI summary
Methods and devices of transmitting and receiving information and a terminal are provided. The information transmission method includes transmitting a first synchronization signal block SSB, wherein the first SSB includes a physical broadcast channel PBCH, the first SSB is configured in a first manner or carries first information, the first information indicates first offset information about a time-domain position of a second synchronization signal block SSB relative to a first position.