Conditional Cell Configuration for Faster RRC Inactive Resume
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Solution Overview
Problem
Existing wireless communication systems face challenges in reducing latency and signaling overheads during the initiation of communications in the RRC inactive state, particularly in 5G networks, which affect the efficiency and responsiveness of wireless devices.
Innovation Solution
An enhanced procedure is introduced to optimize the RRC connection setup process by reducing latency and signaling overheads, involving conditional cell configuration and selective implementation of protocols based on specific criteria such as wireless device capabilities and traffic characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If existing RRC connection setup procedure is used in RRC inactive state, then device can establish connection with network, but latency and signaling overheads are high
Solution Approach 1:
The patent applies preliminary action by pre-configuring cell parameters and maintaining RRC context in the inactive state before actual connection is needed. The network node pre-provides configuration information including cell parameters, and the wireless device pre-establishes a resume ID, so that when connection is required, these pre-prepared elements can be directly utilized without performing complete RRC setup procedures from scratch, thereby reducing latency and signaling overheads.
Solution Approach 2:
The patent segments the RRC connection setup procedure into two parts: a lightweight resume procedure for re-establishing connection quickly, and a separate full configuration procedure that can be applied conditionally. The resume procedure uses pre-configured cell parameters and resume IDs, while only necessary additional configurations are applied through conditional cell reconfiguration, dividing the complex setup into manageable segments that reduce overall signaling overhead.
2Reliability
If full RRC connection configuration is applied, then connection reliability is ensured, but signaling overheads increase
Solution Approach 1:
The patent applies local quality by providing different levels of configuration detail to different cells based on their specific characteristics and requirements. Instead of uniformly applying full RRC configuration to all cells, the network identifies which cells require full configuration and which can use simplified parameters. The conditional cell reconfiguration mechanism selectively applies detailed configurations only where necessary, maintaining connection reliability for critical cells while reducing signaling overhead for cells that can operate with simpler parameters.
Solution Approach 2:
The patent implements dynamics by making the cell configuration approach adaptive and flexible. The network dynamically determines whether to apply full RRC configuration or simplified parameters based on real-time conditions such as device capabilities, traffic characteristics, and network load. The conditional cell reconfiguration mechanism allows the system to transition between different configuration modes as needed, optimizing the balance between connection reliability and signaling overhead for each specific scenario.
3Device complexity
If conditional cell reconfiguration is implemented, then signaling overhead is reduced, but device complexity increases
Solution Approach 1:
The patent introduces an intermediary mechanism in the form of a conditional reconfiguration decision framework that mediates between the network's configuration needs and the device's processing capabilities. This intermediary layer evaluates device capabilities and traffic characteristics before determining the appropriate configuration approach, acting as a buffer that simplifies the device's operational complexity by providing clear decision criteria and standardized handling procedures for different scenarios.
Data Source
AI summary
A method can include receiving, by a wireless device while in a radio resource control (RRC) connected state, via a first cell, one or more messages. The messages can include a conditional cell configuration of a second cell, an indication that the conditional cell configuration is applicable in an RRC inactive state, and a suspend configuration for the RRC inactive state. The method can also include transitioning, based on the suspend configuration, to the RRC inactive state. The method can further include applying, in the RRC inactive state, the conditional cell configuration based on determining to transition, via the second cell, to the RRC connected state and based on the indication that the conditional cell configuration is applicable in the RRC inactive state.