Discovery Burst Transmission Window Configuration for 5G High Frequency Bands
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Solution Overview
Problem
In the 5G frequency band (52.6-71 GHz), the existing methods are unable to configure a discovery burst transmission window (DBTW) through signaling during the initial access phase, leading to insufficient room for candidate synchronization signal and physical broadcast channel blocks (SSBs), which affects transmission reliability.
Innovation Solution
A method and apparatus for determining a DBTW by determining the working frequency band and DBTW length used by terminals during initial access, employing sub-carrier spacings of 480 kHz and 960 kHz, and using PBCH indication information to explicitly or implicitly indicate DBTW lengths, allowing for flexible configuration of DBTW in shared or licensed spectra.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional DBTW configuration methods are used in 5G frequency band (52.6-71 GHz), then the signaling configuration is simple, but the DBTW length is insufficient for candidate SSB transmission, affecting transmission reliability
Solution Approach 1:
The patent changes the DBTW length parameter based on the working frequency band. For frequency bands above 52.6 GHz, the DBTW length is set to a longer duration (e.g., 10 ms) compared to traditional configurations, thereby providing sufficient time for candidate SSB transmission and improving transmission reliability without complex signaling reconfiguration
Solution Approach 2:
The patent performs preliminary determination of the working frequency band before the initial access process. By pre-identifying whether the terminal is operating in a higher frequency band (52.6-71 GHz), the system can proactively configure the appropriate DBTW length in advance, ensuring sufficient transmission time for SSB without requiring complex real-time signaling adjustments
2Productivity
If wider sub-carrier spacing (960 kHz) is employed for higher frequency band, then the frequency spectrum utilization is improved, but the existing DBTW configuration cannot accommodate candidate SSB, reducing transmission reliability
Solution Approach 1:
The patent adjusts the DBTW length parameter according to the sub-carrier spacing configuration. When wider sub-carrier spacing (960 kHz) is used in higher frequency bands, the system automatically extends the DBTW length to accommodate the increased transmission requirements, thereby maintaining transmission reliability while preserving frequency spectrum utilization efficiency
3Reliability
If DBTW length is extended to accommodate candidate SSB, then transmission reliability is improved, but the initial access process complexity increases
Solution Approach 1:
The patent performs preliminary identification of the working frequency band before the initial access process begins. By pre-determining whether the terminal operates in a higher frequency band (52.6-71 GHz), the system can proactively configure the extended DBTW length in advance, thereby improving transmission reliability for candidate SSB while avoiding the need for complex real-time adjustments during the initial access process
Solution Approach 2:
The patent implements dynamic DBTW length configuration based on the detected working frequency band. The system automatically adjusts the DBTW length parameter according to the operating conditions (higher frequency bands trigger longer DBTW), thereby improving transmission reliability adaptively without requiring complex manual configuration or additional signaling overhead during the initial access process
Data Source
AI summary
A method, apparatus, and computer readable medium for determining a discovery burst transmission window (DBTW). The DBTW is determined by determining a working frequency band in an initial access process of a terminal, and determining the DBTW length used by the terminal to transmit a synchronization signal block (SSB) in the initial access process of the working frequency band; and sending the DBTW length. A method for determining a DBTW is performed by a terminal, and the method for determining a DBTW includes: determining a working frequency band according to an initial search procedure; and determining, on the basis of the working frequency band, the DBTW length used in at initial access process for transmitting an SSB.