Dynamic Cell Activation for 5G SSB Energy Reduction
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Solution Overview
Problem
NR base stations have significantly higher energy consumption due to increased bandwidth, ports, and shorter transmission time intervals, and the need for narrower beams at higher frequencies leads to increased RF units and channels, resulting in high energy costs even during periods of no service.
Innovation Solution
The proposed solution involves dynamically activating and deactivating cells based on traffic and measurement reports, allowing cells to stop transmitting synchronization signal blocks and resume only when necessary, enabling the terminal equipment to use synchronization signal blocks from other cells for downlink reception and measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cells continuously transmit synchronization signal blocks to maintain service availability, then reliability is improved, but energy consumption increases
Solution Approach 1:
The patent implements dynamic cell activation and deactivation based on traffic conditions and measurement reports. Cells transition between active and inactive states, with synchronization signal block transmission being dynamically controlled. This dynamic state change allows the system to maintain service availability when needed while reducing energy consumption during low-traffic periods.
Solution Approach 2:
The patent employs periodic cell activation where cells transmit synchronization signal blocks at scheduled intervals rather than continuously. The network device determines activation based on measurement reports and traffic conditions, creating a periodic transmission pattern that reduces overall energy consumption while maintaining periodic service availability.
2Use of energy by moving object
If cells are deactivated to save energy, then energy consumption is reduced, but terminal equipment loses downlink synchronization and measurement capability
Solution Approach 1:
The patent introduces an intermediary mechanism where the terminal equipment can perform measurements and maintain synchronization using stored synchronization signal blocks even when the cell is deactivated. The network device uses measurement reports from terminal equipment as an intermediary to determine when to reactivate cells, ensuring synchronization is maintained through indirect feedback.
Solution Approach 2:
The patent implements preliminary action by having terminal equipment store synchronization signal blocks and measurement data before cell deactivation. This allows the terminal to maintain downlink synchronization and measurement capability temporarily without active transmission, enabling the cell to remain deactivated longer while preserving reliability.
3Use of energy by moving object
If serving cells stop transmitting SSBs to reduce energy cost, then energy consumption is reduced, but terminal equipment cannot perform measurement and must hand over to neighboring cells
Solution Approach 1:
The patent implements feedback mechanisms where terminal equipment sends measurement reports to the network device even when serving cells are deactivated. This feedback allows the network to monitor service quality and reactivate cells when necessary, maintaining service continuity through informed decision-making based on actual terminal measurements and traffic conditions.
Solution Approach 2:
The patent enables terminal equipment to self-manage synchronization and measurements using stored data during cell deactivation periods. The terminal can autonomously maintain basic operations without active serving cell transmission, reducing the need for frequent handovers while preserving service capability through self-service mechanisms.
Data Source
AI summary
An information processing apparatus, for a terminal equipment, includes: a receiver configured to receive first indication information transmitted by a network side device, the first indication information being used to indicate identification information of a first cell, and receive a first synchronization signal block (SSB) of the first cell transmitted by the network side device; and processor circuitry configured to perform downlink reception of a reference signal of a second cell; wherein the reference signal of the second cell and the first synchronization signal block of the first cell are in a quasi-colocated (QCL) relationship.