MN-SN Coordination for Conditional PSCell Changes to Reduce NR Latency
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Solution Overview
Problem
The New Radio (NR) system does not support conditional PSCell changes affecting the Master Node (MN), leading to high latency and a risk of PSCell change failure.
Innovation Solution
Implementing an information configuration method where the Master Node (MN) and Secondary Node (SN) negotiate to support conditional PSCell changes, including transmitting request and response messages to configure PSCell change conditions, target configurations, and radio resource configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the NR system does not support conditional PSCell changes affecting MN, then the system complexity remains low, but the PSCell change latency increases and failure risk rises
Solution Approach 1:
The patent implements conditional PSCell change by performing preliminary actions: the MN sends a request message to the SN to pre-configure the conditional PSCell change, the SN responds with configuration parameters, and the MN forwards these to the terminal device. This preliminary configuration enables the terminal to autonomously execute the PSCell change when conditions are met, improving reliability while managing complexity through structured message exchange.
2Loss of time
If the NR system supports conditional PSCell changes affecting MN, then the PSCell change latency is reduced and failure risk is minimized, but the system complexity increases
Solution Approach 1:
The patent reduces PSCell change latency by performing preliminary configuration actions before the actual change is needed. The MN and SN exchange request and response messages to pre-configure conditional PSCell change parameters, which are then provided to the terminal device. When the change condition is triggered, the terminal can execute the change immediately using pre-configured parameters, significantly reducing execution latency.
Solution Approach 2:
The patent introduces message exchange protocols as intermediaries between the MN, SN, and terminal device. The MN sends request messages to the SN, receives response messages with configuration parameters, and forwards these to the terminal. This intermediary message structure manages system complexity by providing a standardized interface while enabling the conditional PSCell change functionality that reduces latency.
3Reliability
If the MN and SN negotiate to support conditional PSCell changes, then the PSCell change reliability is improved, but the message exchange complexity increases
Solution Approach 1:
The patent uses standardized request and response messages as intermediaries between the MN and SN. The MN sends a request message to the SN to configure conditional PSCell change, and the SN responds with a response message containing configuration parameters. This intermediary message structure improves reliability by ensuring coordinated negotiation between MN and SN while managing complexity through standardized communication protocols.
Data Source
AI summary
Embodiments of the present disclosure provide an information configuration method and apparatus, and a communication device. The method includes: transmitting, by a Master Node (MN), a first request message to a Secondary Node (SN), wherein the first request message is used to request for configuring a conditional Primary Secondary Cell (PSCell) change; receiving, by the MN, a first response message transmitted by the SN, wherein the first response message is used for indicating that the SN accepts the first request message; and transmitting, by the MN to a terminal device, at least one of a PSCell change condition configuration, a target PSCell configuration, and a radio resource configuration on an MN side.