Distributed Base Station Paging with Voice Call Indication
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Solution Overview
Problem
Existing wireless communication systems face challenges in effectively paging a user equipment (UE) when it operates in an inactive or idle state, particularly in distributed base station environments, where it is unclear how to send a paging cause to the UE.
Innovation Solution
The techniques allow one or more of the core network, a central unit of a distributed base station, and/or a distributed unit to determine when a paging message for a UE should include an indication of voice, ensuring the UE correctly disconnects from one core network when receiving a paging message from another core network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a UE operates in idle or inactive state and checks for paging messages from multiple core networks, then the UE can maintain connectivity with multiple networks, but the UE may not correctly determine when to disconnect from one core network when receiving a paging message from another core network
Solution Approach 1:
The patent introduces an intermediary indicator (voice call indicator) in the paging message that mediates between multiple core networks. This indicator explicitly tells the UE whether to maintain or release the current connection, resolving the ambiguity in multi-network scenarios. The indicator acts as a mediator that provides clear instructions to the UE about connection management when paging occurs during idle or inactive states.
2Adaptability or versatility
If distributed base stations are used in the network, then the network can be more scalable and flexible, but it is not clear how a network sends a paging cause to the UE via a distributed base station
Solution Approach 1:
The patent segments the paging functionality in distributed base station architectures by introducing specific information elements (voice call indicator, service indication) that can be independently processed. The paging message is divided into manageable components that can be handled by different network entities (CU, DU, UE) separately, reducing the complexity of coordinating paging across distributed components while maintaining scalability.
3Productivity
If the UE transitions from idle or inactive state to connected state upon receiving a paging message, then the UE can respond to network communications, but the UE may waste resources by transitioning when it should have disconnected from another core network
Solution Approach 1:
The patent applies preliminary action by including the voice call indicator and service indication in the paging message before the UE transitions state. This allows the UE to evaluate the paging cause in advance and make an informed decision about whether to transition to connected state or release the current connection, preventing unnecessary state transitions and associated energy consumption.
Data Source
AI summary
A method for paging a UE is implemented in a distributed unit (DU) of a distributed base station. The method includes receiving, by processing hardware from a central unit (CU) of the distributed base station and when the UE is not operating in a connected state of a protocol associated with controlling radio resources, a CU-to-DU message related to the UE and indicating a voice call; and transmitting, by the processing hardware to the UE via a radio interface, a paging message including an indication of the voice call.