RRC Inactive UE Power Reduction via Multicast RLC Bearer Segmentation
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Solution Overview
Problem
In wireless communication systems, particularly in the RRC_Inactive state, existing technologies face challenges in efficiently managing power consumption and resource utilization for multicast/broadcast services, leading to increased UE power consumption and complexity.
Innovation Solution
A method where a UE in the RRC_Inactive state receives MBS services only via multicast, configuring an RLC bearer of a specific type to reduce power consumption and improve resource utilization, and dynamically updates or deactivates bearers based on message configurations to optimize communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE is configured to receive MBS services via both unicast and multicast transmissions in RRC_Inactive state, then the transmission reliability is improved, but the UE power consumption significantly increases
Solution Approach 1:
The patent extracts the unicast reception function from the RRC_Inactive state MBS service configuration. By removing unicast reception capability when entering RRC_Inactive state, the UE only monitors multicast transmissions, significantly reducing power consumption while maintaining MBS service reliability through multicast-only delivery.
Solution Approach 2:
The patent implements dynamic configuration of RLC bearer types based on transmission requirements. The network dynamically selects between unicast and multicast RLC bearer configurations depending on the MBS service type and UE state, optimizing the balance between reliability and power consumption for different scenarios.
2Reliability
If the UE monitors both unicast and multicast transmissions in RRC_Inactive state, then the data reception completeness is improved, but the UE power consumption significantly increases
Solution Approach 1:
The patent removes unicast monitoring from the UE's operational scope in RRC_Inactive state. The UE is configured to monitor only multicast transmissions for MBS services, eliminating the need to simultaneously monitor both unicast and multicast channels, thereby reducing power consumption while maintaining complete data reception through multicast-only delivery.
3Use of energy by moving object
If the UE enters RRC_Inactive state to reduce power consumption, then the power consumption is reduced, but the transmission efficiency for MBS services deteriorates
Solution Approach 1:
The patent segments the RLC bearer into different types (first type for unicast, second type for multicast) and applies different monitoring strategies based on bearer type. In RRC_Inactive state, the UE selectively monitors only multicast bearers (second type) while ignoring unicast bearers (first type), achieving a balance between low power consumption and maintained transmission efficiency for MBS services.
Data Source
AI summary
A first node receives a first message; and enters into RRC_Inactive state as a response to receiving the first message; where whether to receive data units via a first RLC bearer in the RRC_Inactive state is related to whether the first message configures a first bearer and a type of the first RLC bearer; before receiving the first message the first RLC bearer is associated to the first bearer; when the first message configures the first bearer and the type of the first RLC bearer is a first type, data units are not received via the first RLC bearer in the RRC_Inactive state; when the first message configures the first bearer and the type of the first RLC bearer is a second type, data units are received via the first RLC bearer in the RRC_Inactive state. This application significantly reduces UE power consumption.