Uplink Data Indication for Resume Procedure in MR-DC
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Solution Overview
Problem
In wireless communication networks, the resume procedure for communication devices operating in dual connectivity with a Master Cell Group (MCG) and a Secondary Cell Group (SCG) is inefficient due to the network node's inability to determine whether uplink data is associated with the MCG or SCG, leading to unnecessary activation or deactivation of the SCG, resulting in increased power consumption and signaling overhead.
Innovation Solution
The communication device initiates a resume procedure by determining the type of uplink data and sending an UL data indication to the network node, specifying whether the data is for an MCG, SCG, or split bearer, allowing the network node to accurately configure the SCG state during the resume process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the network node activates the SCG during resume procedure, then the uplink data transmission capability is improved, but the power consumption increases
Solution Approach 1:
The patent changes the state parameter of the SCG from activated to deactivated based on the data type indication. When the UE indicates uplink data is for MCG bearer or split bearer, the network node changes the SCG state to deactivated, thereby reducing power consumption while maintaining adequate uplink transmission capability through the MCG.
2Speed
If the network node determines SCG configuration blindly, then the resume procedure speed is improved, but the signaling overhead increases due to subsequent reconfiguration messages
Solution Approach 1:
The patent applies preliminary action by having the UE indicate the data type (MCG bearer, SCG bearer, or split bearer) in the resume request message before the resume procedure completes. This allows the network node to determine the appropriate SCG configuration in advance and include it in the resume message, avoiding the need for subsequent reconfiguration signaling.
3Use of energy by moving object
If the network node deactivates the SCG to save power, then the power consumption is reduced, but the uplink data transmission capability deteriorates when SCG data is available
Solution Approach 1:
The patent uses parameter changes to dynamically adjust the SCG state based on the indicated data type. When the UE indicates uplink data is for SCG bearer, the network node changes the SCG state to activated, ensuring adequate uplink transmission capability. When the data is for MCG bearer or split bearer, the SCG is deactivated to save power.
Data Source
AI summary
A method performed in a communication device for handling a resume procedure from a power saving mode of operation to a connected mode of operation is disclosed. The communication device is configured with multi-radio dual connectivity (MR-DC) with a first cell group and a second cell group in a wireless communication network. The method comprises initiating (13010) a resume procedure when there is an uplink (UL) data available at the communication device while it is in the power saving mode of operation; setting (13050, 13060) an UL data indication indicating whether the UL data is available for the first cell group or the second cell group; and transmitting (13070) the UL data indication to a network node.