SCG Mode Change Rejection Reasons in MR-DC Networks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication networks with dual connectivity, the Secondary Cell Group (SCG) power saving mode is inefficient due to the inability to fully deactivate the PSCell, leading to increased power consumption and delayed SCG activation/deactivation, which is burdensome on the network and user equipment.
Innovation Solution
Implementing a method where network nodes, either Master Node (MN) or Secondary Node (SN), can initiate and manage SCG mode changes by providing rejection reasons for SCG activation/deactivation requests, allowing for informed resource allocation and optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the PSCell is kept active to maintain SCG connectivity, then network coverage and signal reception are improved, but power consumption increases and device battery life decreases
Solution Approach 1:
The patent implements dynamic switching between SCG operation modes (activated and deactivated) based on network conditions and traffic requirements. The PSCell can be dynamically activated or deactivated, allowing the system to adapt between maintaining full connectivity (when needed) and reducing power consumption (when SCG services are not required), thus resolving the contradiction between reliability and energy usage.
2Speed
If the SCG is quickly activated or deactivated to respond to changing network conditions, then network responsiveness and resource allocation efficiency are improved, but signaling overhead and network burden increase
Solution Approach 1:
The patent employs preliminary configuration where the SCG is pre-configured with necessary parameters and resources before actual activation is needed. This allows the SCG to be quickly activated when required without extensive setup signaling, as the configuration is already in place. The pre-configuration approach enables fast SCG activation/deactivation while minimizing the signaling overhead during actual mode changes.
3Productivity
If detailed rejection reasons are provided for SCG mode changes to improve resource management, then network optimization and power savings are improved, but information exchange complexity and signaling overhead increase
Solution Approach 1:
The patent applies local quality by providing detailed rejection reasons selectively based on the specific situation and node type. Different nodes (MN and SN) provide different levels of detail in rejection reasons depending on their role and the specific SCG mode change context. This selective information provision enables effective resource management and power optimization while avoiding unnecessary signaling overhead for every possible scenario.
Data Source
AI summary
A first network node and method therein for handling an operation mode change of a second network node for a communication device in a wireless communication network are disclosed. The communication device is configured with multi-radio dual connectivity (MR-DC) with the first network node having a first cell group and the second network node having a second cell group. The first network node receives (913) a request from the second network node for a change of operation mode and/or a change of configuration of the second network node and determines (914) whether to accept or reject the request for the change of the operation mode and/or a change of configuration. The first network node transmits (915) to the communication device a message including a reconfiguration or command to change the second cell group configuration and/or the operation mode of the second cell group, if it is determined that the change of operation mode of the second cell group and/or change of the second cell group configuration is accepted; or transmits (917) a response to the second network node with an indication indicating a rejection reason, if it is determined to reject the request for the change of the operation mode.