Inter-Core Network Reselection Control via Ranking Offset
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing inter-core network reselection, leading to excessive signaling overhead and power consumption, particularly in massive deployments like NB-IoT, due to the need for registration procedures and context transfers between different core network types.
Innovation Solution
A user equipment (UE) method that receives a core network type cell ranking offset parameter, ranks neighbor cells based on this parameter, and selectively reselects to a neighbor cell associated with a different core network type, optimizing reselection to reduce signaling overhead and power usage while ensuring better cell quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If inter-core network reselection is performed without optimization, then UE can access different core network types for service continuity, but signaling overhead and power consumption increase excessively
Solution Approach 1:
The network pre-configures the UE with a core network type restriction list and cell ranking offset parameters before reselection occurs. This preliminary configuration enables the UE to perform restricted reselection evaluations that avoid unnecessary inter-core network reselections, thereby reducing power consumption while maintaining access flexibility to appropriate core network types.
Solution Approach 2:
The invention introduces a core network type cell ranking offset parameter that modifies the cell ranking calculation process. By changing the ranking parameters based on core network type restrictions, the UE is guided to select cells within the allowed core network types, reducing unnecessary reselection signaling and associated power consumption while preserving service continuity.
2Adaptability or versatility
If inter-core network reselection is performed without optimization, then UE can access different core network types for service continuity, but signaling overhead increases excessively
Solution Approach 1:
The network provides preliminary configuration including a restriction list of allowed core network types and cell ranking offset parameters before reselection. This advance configuration enables the UE to perform restricted reselection evaluations that avoid unnecessary inter-core network reselections, thereby reducing signaling overhead while maintaining access flexibility.
Solution Approach 2:
The invention modifies the cell ranking process by introducing core network type-specific offset parameters. This parameter change guides the UE to prioritize cells within allowed core network types, reducing the frequency of inter-core network reselection events and the associated signaling overhead, while preserving necessary service continuity capabilities.
3Ease of operation
If UE performs cell reselection based on traditional ranking without core network type consideration, then cell selection is simple, but inter-core network reselection occurs frequently causing network inefficiency
Solution Approach 1:
The invention extends the traditional cell ranking mechanism by incorporating core network type cell ranking offset parameters. The UE continues to perform ranking based on signal quality measurements but with an additional parameter that penalizes or prevents reselection to cells with restricted core network types. This maintains the simplicity of the ranking process while improving network efficiency by reducing unnecessary inter-core network reselections.
Solution Approach 2:
The network pre-configures the UE with core network type restriction lists and associated offset parameters before reselection occurs. This preliminary configuration enables the simplified ranking process to inherently account for core network type preferences, improving network efficiency without complicating the UE's reselection operation.
Data Source
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AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a serving cell, signaling identifying a core network type cell ranking offset parameter. The UE may rank, based at least in part on the core network type cell ranking offset parameter, a neighbor cell for reselection relative to the serving cell, wherein the neighbor cell is associated with a different core network type than the serving cell. The UE may selectively reselect to the neighbor cell based at least in part on ranking the neighbor cell for reselection relative to the serving cell. Numerous other aspects are provided.