Wireless Synchronization Signal Raster and Carrier Frequency Indication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 3GPP NR, the synchronization signal raster and NR channel raster are often different, making it difficult for User Equipment (UE) to determine the carrier frequency implicitly from detected synchronization signals, which complicates tasks such as tuning oscillators, performing receiver filtering, and conducting mobility measurements.
Innovation Solution
A transmitting device transmits synchronization signals on a first frequency raster and indicates the carrier frequency using an integer number, allowing a receiving device to determine the carrier frequency based on this indication, reducing signaling overhead and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If synchronization signal raster and NR channel raster are made different to reduce search complexity and provide flexibility, then UE cannot determine carrier frequency implicitly from synchronization signal, but if they are made same then UE can determine carrier frequency implicitly
Solution Approach 1:
The patent introduces an intermediary mechanism (indication information) that bridges the gap between the synchronization signal frequency and the carrier frequency. When the first frequency raster and second frequency raster are different, the transmitting device sends indication information to help the receiving device determine the carrier frequency. This intermediary element allows the system to maintain different rasters for flexibility while still providing the necessary carrier frequency information to the UE.
2Ease of operation
If synchronization signal raster is made sparser to reduce search complexity for UE, then search complexity is reduced, but carrier frequency determination becomes more difficult
Solution Approach 1:
The patent applies preliminary action by having the transmitting device pre-calculate and transmit indication information that contains carrier frequency determination data. This preliminary provision of information allows the UE to perform a simplified search on the sparser synchronization signal raster without subsequently struggling to determine carrier frequency, as the necessary information is already provided in advance through the indication mechanism.
3Area of stationary object
If multiple synchronization signals are transmitted at different frequency locations on first raster, then frequency coverage is improved, but signaling overhead for indicating carrier frequency increases
Solution Approach 1:
The patent makes the indication information mechanism universal and multi-functional. The same indication information structure can handle cases with one synchronization signal as well as cases with multiple synchronization signals at different frequency locations. The indication information efficiently conveys carrier frequency determination data regardless of how many synchronization signals are transmitted, thereby providing broad frequency coverage without proportionally increasing signaling overhead.
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The invention relates to a transmitting device (100) and a receiving device (300) for a wireless communication system (500). The transmitting device (100) is configured to transmit one or more synchronization signals on a carrier to at least one receiving device (300), wherein a frequency of a synchronization signal among the one or more synchronization signals is located on a first frequency raster and a carrier frequency of the carrier is deployed on a second frequency raster, and wherein frequencies of two different synchronization signals among the one or more synchronization signals are located on different frequency positions in the first raster; and transmit an indication of the carrier frequency to the at least one receiving device (300), wherein the indication comprises at least one integer number. The receiving device (300) is configured to derive the carrier frequency based on the at least one integer number. Furthermore, the invention also relates to corresponding methods and computer program.