Cellular Mobility Negotiation for Candidate Cell Configuration
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Solution Overview
Problem
In cellular communication systems, there is a need for a method to ensure consistent understanding of configuration information for candidate cells and cell groups among network nodes to facilitate selective activation without excessive signaling overhead.
Innovation Solution
A negotiation method involving a source node sending a request message to a target node for configuration information of target cells and/or cell groups, and receiving a feedback message to update pre-configured candidate cell information, ensuring consistent understanding and reducing signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If configuration information of candidate cells and cell groups is pre-negotiated among network nodes, then consistent understanding is achieved and selective activation can be performed, but signaling overhead increases due to the negotiation process
Solution Approach 1:
The patent applies preliminary action by pre-negotiating and configuring candidate cell and cell group information among network nodes (source node, target node, and anchor node) before handover execution. The source node sends a first negotiation message to the target node, which includes candidate cell information and candidate cell group information. The target node responds with a second negotiation message confirming the configuration. This preliminary configuration ensures all nodes have consistent understanding of which cells and cell groups can be selectively activated, eliminating the need for repeated negotiation during actual handover operations.
2Reliability
If configuration information is negotiated among multiple network nodes, then consistent understanding is achieved, but the complexity of the negotiation process increases
Solution Approach 1:
The patent segments the negotiation process into distinct phases and message types. The first negotiation message from the source node to the target node contains specific candidate cell information and candidate cell group information. The second negotiation message from the target node back to the source node provides confirmation or modification. This segmentation of information exchange into structured, separate messages simplifies the overall negotiation complexity by breaking down the multi-node coordination into manageable, standardized communication steps.
Data Source
AI summary
A negotiation method in a cellular network is performed by a source node, and includes: sending a request message to a target node, in which the request message is used to request configuration information of at least one target cell or at least one target cell group for at least one mobility management operation; and receiving a feedback message sent by the target node.