Network Slice Selection Assistance for Low-Power Cell Search
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Solution Overview
Problem
In wireless communication systems, user equipment (UE) experiences increased power consumption when monitoring separate radio carriers to establish a Radio Resource Control (RRC) connection on a different cell supporting a desired network slice, and existing solutions do not effectively provide frequency mapping for network slices across varying registration areas or initial cell selection scenarios.
Innovation Solution
The network provides selection assistance information to the UE, including frequency and cell detection information, to facilitate quick identification and connection to a target cell supporting the desired network slice, reducing power consumption and minimizing connection delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the UE monitors separate radio carriers to establish RRC connection on a different cell supporting the desired network slice, then the connection delay is reduced, but the power consumption increases
Solution Approach 1:
The network provides selection assistance information to the UE in advance, including frequency mapping for network slices and target cell identification data. This allows the UE to perform preliminary cell search and selection operations more efficiently when establishing RRC connections, reducing the need for extensive carrier monitoring while maintaining low connection delay.
2Productivity
If the network provides detailed frequency mapping information for network slices, then the UE can quickly identify target cells, but the signaling overhead increases
Solution Approach 1:
The selection assistance information is provided in a targeted manner specific to each UE's requirements and the particular network slice being accessed. The frequency mapping and cell identification information are customized based on the UE's current location, subscription, and service requirements, rather than providing universal information for all slices and UEs, thus reducing overall signaling overhead.
Solution Approach 2:
The network pre-configures and provides frequency mapping information for network slices during initial registration or before the UE needs to access a specific slice. This preliminary provision of information allows the UE to perform efficient cell search and selection without requiring extensive real-time signaling when actual connection establishment is needed.
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for receiving selection assistance information corresponding to a preferred network slice. One apparatus includes a processor and a transceiver that receives selection assistance information corresponding to a set of preferred network slices from the mobile communication network, where the selection assistance information includes an indication of at least one preferred network slice starting with a most preferred network slice in a priority order, the selection assistance information further including target cell detection information and/or target cell selection information. The processor performs cell search on a highest priority frequency layer corresponding to the most preferred network slice and selects a cell of the highest priority frequency layer that supports the most preferred network slice based on results of the cell search.