Anchor-Cell System Information for Wireless Cell Power Saving
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in managing power saving functions, particularly in stopping the transmission of Synchronization Signal/Physical Broadcast Channel blocks (SSB) and System Information Block Type1 (SIB1), leading to increased power consumption and prolonged information acquisition times when cells are in a power saving state.
Innovation Solution
A terminal apparatus and base station apparatus are configured to exchange information about power saving functions across cells, allowing the terminal to efficiently obtain system information by identifying anchor cells where SSB and SIB1 are transmitted, and enabling or disabling these functions as needed to reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the transmission of SSB and SIB1 is stopped on some cells to save power, then power consumption is reduced, but the terminal apparatus cannot efficiently acquire system information when moving between cells
Solution Approach 1:
The patent introduces an intermediary mechanism where anchor cells transmit system information of power saving cells to terminals. This intermediary approach allows power saving cells to stop transmitting SSB and SIB1 (reducing power consumption) while terminals can still acquire the necessary system information through anchor cells, thus resolving the contradiction between power saving and information acquisition efficiency
Solution Approach 2:
The patent segments cells into two types: anchor cells that continuously transmit system information and power saving cells that stop transmission. This segmentation allows the system to maintain information availability through anchor cells while enabling power saving mode in specific cells, thereby reducing overall power consumption without compromising terminal mobility and information acquisition
2Reliability
If the terminal apparatus continuously monitors all neighbor cells for system information, then it can maintain accurate cell selection, but power consumption increases
Solution Approach 1:
The patent applies partial action by having terminals monitor only anchor cells for system information instead of continuously monitoring all neighbor cells. This partial monitoring approach maintains reliable cell selection accuracy through anchor cell information while significantly reducing the terminal's power consumption by eliminating the need to continuously scan all cells
3Ease of operation
If system information is transmitted on all cells, then terminals can easily acquire information during cell movement, but power consumption across the network increases
Solution Approach 1:
The patent applies local quality by differentiating the functional roles of different cells: anchor cells maintain continuous system information transmission for ease of operation, while power saving cells stop transmission to reduce network power consumption. This localized differentiation allows the network to optimize both information accessibility and power consumption by assigning different operational characteristics to different cells based on their roles
Data Source
AI summary
A terminal apparatus in a wireless communication network that provides a communication service to the terminal apparatus with use of at least one of a plurality of cells obtains, with respect to each of neighbor cells that neighbor a camp-on cell on which the terminal apparatus is camping, information indicating whether a power saving function for stopping transmission of system information has been enabled, and transmits, in a case where a radio quality of a signal transmitted on a power saving cell on which the power saving function has been enabled satisfies a camp-on cell movement condition, a request message for requesting stoppage of the power saving function to a base station apparatus that provides the power saving cell.