5G NR SSB Resource Allocation for IoT Power Savings
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Solution Overview
Problem
In 5G NR systems, the existing SSB design consumes significant resources, leading to energy wastage at night or during low-traffic hours when traffic and users are reduced, as it maintains full configuration, which is inefficient for IoT applications requiring low power consumption and enhanced coverage.
Innovation Solution
The proposed method reduces power consumption by using a frequency division multiplexing manner for synchronization signals and physical broadcast channels, increasing the number of OFDM symbols occupied by these signals, allowing for intelligent shutdown of carriers, subframes, or symbols during low-traffic periods, while maintaining or enhancing coverage by adjusting the resource occupation patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station maintains full SSB configuration with 20 resource blocks, then signal coverage is ensured, but power consumption increases during low-traffic periods
Solution Approach 1:
The patent implements dynamic resource allocation for SSB transmission by configuring different resource block quantities for different time periods. During high-traffic periods, the base station transmits SSB using 20 resource blocks to ensure comprehensive coverage. During low-traffic periods (such as nighttime), the base station reduces SSB transmission to use only 1 resource block, thereby significantly reducing power consumption while maintaining essential coverage for IoT devices.
2Reliability
If the SSB occupies 20 resource blocks, then coverage is enhanced, but resource efficiency decreases during low-traffic hours
Solution Approach 1:
The patent implements periodic switching of SSB resource allocation patterns based on traffic conditions. The base station periodically adjusts the number of resource blocks allocated to SSB transmission between 1 and 20 blocks according to predefined time schedules or traffic thresholds. This periodic adaptation ensures that full coverage is maintained during high-traffic periods while energy waste is minimized during low-traffic periods, optimizing the balance between coverage and energy efficiency.
3Use of energy by stationary object
If the base station reduces SSB resources at night, then power consumption decreases, but coverage may be compromised
Solution Approach 1:
The patent applies local quality optimization by differentiating SSB transmission resources based on specific time periods and traffic conditions. Instead of uniformly reducing resources across all periods, the base station maintains full 20-resource-block SSB configuration during high-traffic periods to ensure comprehensive coverage, while selectively reducing to 1 resource block during low-traffic nighttime periods when full coverage is less critical. This localized resource allocation optimizes the trade-off between power consumption and coverage for different operational contexts.
Data Source
AI summary
A signal transmission method and a related device, to transmit a signal between a network device and a terminal device. The method in the embodiments includes: sending a first synchronization signal/broadcast channel block (SSB) to a first terminal device, where the first SSB includes a synchronization signal and a physical broadcast channel (PBCH), the synchronization signal and the PBCH use a frequency division multiplexing (FDM) manner in resource occupation, a quantity of orthogonal frequency division multiplexing (OFDM) symbols occupied by the synchronization signal is greater than 2, and a quantity of OFDM symbols occupied by the PBCH is greater than 3.