SSB Frequency-Domain Multiplexing for NR Beam Coverage
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Solution Overview
Problem
The limitation on the maximum quantity of SSB beams in the New Radio (NR) system due to frequency bands and time-division duplexing constraints reduces the available SSBs, limiting coverage and measurement operations.
Innovation Solution
Implementing a synchronization signal transmission method that allows for flexible frequency domain multiplexing of SSBs, increasing their number and beam gains through different frequency domain positions indicated by configuration information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the maximum quantity of SSB beams is limited due to frequency bands and time-division duplexing constraints, then the system complexity is reduced, but the coverage and measurement operations are limited
Solution Approach 1:
The patent extends the SSB set by introducing frequency domain multiplexing as an additional dimension. Instead of only time-domain distribution, SSBs are now distributed across both time and frequency domains, allowing more SSB beams to be transmitted without proportionally increasing system complexity in the time domain alone.
Solution Approach 2:
The patent changes the parameter of SSB distribution from purely time-domain to include frequency-domain positions. By configuring multiple frequency domain positions for SSBs, the system can support a larger quantity of SSB beams while managing complexity through structured frequency resource allocation.
2Quantity of substance
If the quantity of SSB beams is increased to improve directionality and beam gain, then the coverage is enhanced, but the available SSB resources are reduced due to frequency band limitations
Solution Approach 1:
The patent resolves this contradiction by adding frequency domain as another dimension for SSB distribution. This allows the system to increase the quantity of SSB beams beyond what is available in the time domain alone, effectively expanding the available SSB resources by utilizing frequency domain multiplexing.
3Device complexity
If SSBs are organized in sets with limited quantity and fixed time domain distribution, then the system structure is simplified, but the coverage and measurement effects are limited
Solution Approach 1:
The patent changes the system structure by introducing frequency domain position parameters for SSB configuration. This allows the network device to flexibly configure multiple frequency domain positions for SSBs within a set, increasing the quantity of SSBs without significantly complicating the overall system structure through standardized configuration mechanisms.
Data Source
AI summary
A synchronization signal transmission method and a device are provided. The method includes: receiving first configuration information, where the first configuration information is used to indicate a first synchronization signal block SSB, and a frequency domain position of the first SSB is different from that of a second SSB, where the second SSB is obtained by cell search; or the second SSB is indicated by second configuration information; and the first configuration information and the second configuration information are carried in same or different signaling.