Secondary Node Measurement Identity Coordination
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Solution Overview
Problem
The existing coordination between master nodes (MN) and secondary nodes (SN) in dual-connectivity scenarios often leads to inefficient sharing of measurement identities, resulting in performance degradation, incorrect network behavior, and potential RRC reestablishment with connectivity drops, due to inflexible signaling and lack of optimal coordination.
Innovation Solution
A method where the secondary node requests and adjusts the maximum number of measurement identities from the master node, allowing for dynamic configuration and release of identities to meet changing needs, thereby optimizing the coordination and ensuring UE capabilities are not exceeded.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the secondary node uses a fixed number of measurement identities configured by the master node, then the network signaling is simplified, but the measurement identity sharing becomes inefficient and may exceed UE capabilities
Solution Approach 1:
The patent implements dynamic adjustment of the maximum number of measurement identities. The secondary node can request increases when additional identities are needed, and the master node updates the configuration based on UE capability availability. This transforms the static configuration into a dynamic system that adapts to changing measurement needs while ensuring UE capabilities are not exceeded.
Solution Approach 2:
The patent establishes a feedback mechanism where the secondary node monitors its measurement identity usage and sends requests to the master node when the current allocation is insufficient. The master node responds by updating the maximum number of measurement identities based on UE capability assessments. This closed-loop feedback ensures efficient utilization of measurement identities while maintaining capability compliance.
2Productivity
If the secondary node requests additional measurement identities dynamically, then the measurement identity sharing efficiency improves, but the signaling overhead increases
Solution Approach 1:
The patent enables the secondary node to self-manage its measurement identity allocation by autonomously determining when additional identities are needed and initiating requests to the master node. This self-service approach allows the secondary node to optimize its own configuration based on local measurement requirements, improving overall sharing efficiency while minimizing unnecessary signaling.
Solution Approach 2:
The patent changes the parameter of maximum number of measurement identities from a fixed value to a dynamically adjustable parameter. The master node updates this parameter based on UE capability assessments and secondary node requests, allowing the system to adapt the measurement identity allocation to actual needs rather than using a static conservative allocation.
3Speed
If the master node allocates measurement identities without coordination, then the configuration process is faster, but incorrect network behavior may occur due to exceeding UE capabilities
Solution Approach 1:
The patent implements preliminary assessment of UE capabilities by the master node before allocating measurement identities. The master node evaluates the UE's maximum measurement identity capacity in advance and uses this information to make informed allocation decisions. This preliminary action prevents incorrect network behavior by ensuring allocations always remain within UE capabilities while still enabling relatively fast configuration.
Data Source
AI summary
A method performed by a secondary node is provided. The method includes coordinating a number of measurement identities exchanged with a master node. The coordinating includes at least one of the following: signaling a request to the master node for a new value for a maximum number of measurement identities that the secondary node can configure when the secondary node wants to allocate additional measurement identities in excess of a prior number of measurement identities configured by the master node; and subsequent to receiving from the master node the new value for the maximum number of measurement identities and wherein the secondary node previously configured the measurement identities based on a prior value for the maximum number measurement identities, releasing a number of the measurement identities to comply with the new value.