Deactivated Secondary Node RLF and PHR Handling in 5G MR-DC
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Solution Overview
Problem
Current 5G technology lacks detailed procedures for radio link failure (RLF) processing and power headroom report (PHR) handling in a deactivated secondary node (SN) case within multi-radio dual connectivity (MR-DC) scenarios, leading to unclear UE behavior and inefficient resource allocation.
Innovation Solution
The method involves a UE receiving configuration information and deactivation indications from the network to manage the SN state, handling timers like T310 and T312, and transmitting PHR reports, ensuring proper RLF recovery and resource reallocation between the master node (MN) and SN.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If detailed procedures for RLF processing and PHR handling in deactivated SN case are not defined, then the system maintains simplicity, but UE behavior becomes unclear and resource allocation becomes inefficient
Solution Approach 1:
The patent applies preliminary action by pre-defining UE behavior procedures for deactivated SN cases before actual RLF or PHR events occur. The specification establishes predetermined rules for timer handling (T310, T312), PHR transmission conditions, and RLF detection procedures in deactivated SN scenarios, so that UEs have clear guidance when these events occur, eliminating behavior uncertainty without requiring complex real-time decision-making mechanisms
2Reliability
If RLF processing procedures are not defined for deactivated SN, then the system remains simple, but communication reliability during link failure deteriorates
Solution Approach 1:
The patent applies local quality by defining specific RLF processing rules only for deactivated SN cases, while leaving activated SN procedures unchanged. The specification introduces targeted procedures for handling RLF in deactivated SN scenarios, including specific timer behaviors and recovery mechanisms applicable only to deactivated SNs, rather than redesigning the entire RLF processing framework
Solution Approach 2:
The patent segments the RLF processing procedures by SN state, creating distinct handling paths for activated and deactivated SNs. The specification divides the overall RLF processing into separate procedural branches based on SN activation status, allowing tailored recovery mechanisms for each state without interfering with the unified RLF handling framework
3Use of energy by moving object
If PHR procedure is not defined for deactivated SN, then the system maintains simplicity, but power management efficiency deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-defining PHR transmission conditions and procedures for deactivated SN cases. The specification establishes predetermined rules for when PHR should be transmitted or suppressed in deactivated SN scenarios, allowing UEs to make efficient power decisions without complex real-time analysis of SN state and PHR necessity
Data Source
AI summary
Embodiments of the present application relate to methods and apparatuses for a radio link failure (RLF) processing procedure and a power headroom report (PHR) procedure in a deactivated secondary node (SN) case in a multi-radio dual connectivity (MR-DC) scenario under a 3rd Generation Partnership Project (3GPP) 5G system or the like. According to an embodiment of the present application, a method can include: receiving configuration information from a network, wherein the configuration information relates to a master node (MN) and a SN; receiving a deactivation indication from the network, wherein the deactivation indication is associated with the SN; and in response to receiving the deactivation indication, stopping a timer associated with a RLF if the timer associated with a RLF is running, and reporting a PHR.