SSB Structure Switching for Energy-Efficient Downlink Synchronization
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Solution Overview
Problem
The increasing demand for high data throughput and diverse communication services in wireless networks has led to a need for enhanced mobile broadband (eMBB) communication, massive machine type communication (mMTC), and ultra-reliable and low-latency communication (URLLC), while also requiring network energy conservation and power saving for user equipment (UEs) and the network.
Innovation Solution
The method involves transitioning between different synchronization signal blocks (SSBs) with distinct structures to achieve network energy saving, including monitoring a first type SSB for synchronization, transitioning to a second type SSB with reduced resource blocks and modified subcarrier spacing, and incorporating a cyclic prefix, random access preamble, and guard period to conserve energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional SSB structure is used for continuous synchronization, then synchronization reliability is maintained, but network energy consumption increases
Solution Approach 1:
The patent implements periodic SSB transmission instead of continuous transmission. The base station transmits SSB signals at predetermined time intervals rather than continuously, allowing the network to conserve energy during periods when synchronization is not needed while maintaining synchronization reliability when needed through periodic updates.
Solution Approach 2:
The patent dynamically adjusts SSB transmission parameters based on network conditions and UE requirements. The base station can modify transmission periodicity, time resources, and frequency resources dynamically to balance between synchronization reliability and energy conservation, adapting the transmission strategy to current network load and UE activity patterns.
2Use of energy by stationary object
If SSB transmission resources are reduced for energy saving, then network energy consumption decreases, but synchronization accuracy may deteriorate
Solution Approach 1:
The patent changes transmission parameters such as time resources, frequency resources, and periodicity to optimize the balance between energy saving and synchronization accuracy. By adjusting these parameters dynamically, the system can reduce energy consumption while maintaining sufficient synchronization accuracy for ongoing communications.
Solution Approach 2:
The patent applies partial action by transmitting SSB signals only when necessary rather than continuously. The base station determines appropriate transmission moments based on UE activity patterns and network conditions, providing sufficient synchronization information without the excessive transmission that would waste energy.
3Use of energy by stationary object
If SSB structure is modified with reduced resource blocks, then energy efficiency improves, but device complexity increases
Solution Approach 1:
The patent segments the SSB transmission into distinct time resources and frequency resources within the available spectrum. By dividing the transmission into specific segments (time slots and frequency blocks), the system can control energy consumption in each segment while managing the overall complexity through structured organization rather than monolithic changes.
Data Source
AI summary
A first-type synchronization signal block (SSB) is transmitted on a cell at a first-type SSB time in a first mode. A second-type SSB is transmitted on the cell at a second-type SSB time on the basis of switching from the first mode to a second mode. The first type SSB includes a PSS, an SSS, and a PCBCH, and the second-type SSB has a different structure from the first-type SSB.