Master Node Switching via Protocol Context Reuse
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current procedures for switching master nodes in wireless communication systems are time-consuming, leading to high latency and radio resource interference, which fail to meet the low latency and high reliability requirements of 5G communications, especially for Critical Machine Type Communication (C-MTC) applications.
Innovation Solution
A method that involves signaling between a wireless device and network nodes to reuse existing protocol entities and context, allowing for a fast role-switch from one master node to another by informing the third network node to become the master node, thereby reducing unnecessary signaling and accelerating the role-switching process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If current master node switching procedures are used, then the switching can be completed with existing protocols, but the switching time is too long causing high latency
Solution Approach 1:
The target network node prepares protocol entities and context information in advance before the actual master node switching occurs. This preliminary preparation enables the wireless device to quickly switch to the new master node without extensive setup time during the handover process, thereby reducing handover interruption time while maintaining reliability.
Solution Approach 2:
The target network node receives and stores context information from the source network node, creating a copy of the necessary protocol state and configuration. This copying mechanism allows the target node to be pre-configured with all necessary information to immediately take over as master node, eliminating the need for lengthy re-negotiation during switching.
2Productivity
If traditional signaling procedures are followed, then protocol compatibility is maintained, but unnecessary signaling increases latency
Solution Approach 1:
The invention extracts and reuses essential context information (such as protocol entities, configuration parameters, and session state) from the source network node, separating these critical elements from the complete signaling procedure. By taking out only the necessary context rather than retransmitting all signaling messages, the system achieves faster role-switching while maintaining protocol compatibility.
Solution Approach 2:
The context information structure is designed to be universal and reusable across different master node instances. The same context format can be copied and applied when switching between any source and target network nodes, enabling efficient role-switching without requiring node-specific reconfiguration or additional signaling overhead.
Data Source
AI summary
A method performed in a wireless communications system for changing master node for a wireless device (WD). A first node is the master node for the WD, and second and third nodes are secondary nodes for the WD. The third node receives information that the third node is to be the master node and information to reuse a first set of existing protocol entities and context for communication with the WD. The WD receives information about a change of master node from the first node to the third node and information to reuse a second set of existing protocol entities and context for communication with the third node. The second node receives information that the third node is the master node and information to reuse a third set of existing protocol entities and context for communication with the WD. Thereby the master node for the WD is changed.