Wireless Node Radio Link Degradation Feedback
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Solution Overview
Problem
In dual connectivity mobile communication systems, when a user equipment detects degradation of the radio link with the master node, communication is terminated, and re-establishment of the RRC connection with another base station is required, but this can lead to delayed recovery of communication if the radio link improves subsequently.
Innovation Solution
A communication control method where the wireless communication node detects degradation of the radio link with the first node, transmits an indication of this degradation to the second node, and subsequently transmits an indication of radio link recovery to the second node once recovery is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the user equipment terminates dual connectivity communication upon detecting radio link degradation with the master node, then the reliability of communication is improved by avoiding further degradation, but the recovery time increases when the radio link improves subsequently
Solution Approach 1:
The patent implements a feedback mechanism where the user equipment continuously monitors the radio link status with the master node and provides feedback to both the master and secondary nodes. When radio link degradation is detected, the user equipment notifies the secondary node, which maintains the connection in a suspended state. When recovery is detected, the user equipment notifies the secondary node again, enabling rapid reactivation of dual connectivity without requiring full re-establishment procedures, thus reducing recovery time while maintaining reliability.
Solution Approach 2:
The patent applies preliminary action by having the secondary node prepare and maintain a suspended connection state in advance when degradation is detected. Instead of completely terminating the connection, the system preserves the connection parameters and state information, allowing for rapid restoration of full dual connectivity operation when radio conditions improve, thereby reducing the time needed for recovery.
2Stability of the object's composition
If the user equipment re-establishes RRC connection with another base station upon radio link failure, then the communication continuity is improved, but the complexity of communication management increases
Solution Approach 1:
The patent segments the connection management process by introducing a suspended state between fully established and completely terminated connections. The secondary node maintains separate connection states for the master and secondary connections, allowing independent management. When degradation occurs, only the master connection is affected while the secondary connection remains in a suspended but active state, simplifying the re-establishment process and reducing overall management complexity.
Solution Approach 2:
The secondary node acts as an intermediary that facilitates smooth transition and recovery. When radio link degradation is detected with the master node, the secondary node receives notification from the user equipment and suspends the secondary connection in an intermediate state. This intermediary state allows the system to maintain communication continuity while avoiding the complexity of complete connection termination and re-establishment, as the suspended connection can be quickly activated when conditions improve.
Data Source
AI summary
A communication control method for controlling predetermined communication in which a wireless communication node communicates with a first node and a second node. The communication control method comprises detecting, by the wireless communication node, degradation of a radio link between the first node and the wireless communication node; transmitting, by the wireless communication node, an indication of the degradation of the radio link, to the second node in response to the detecting of the degradation of the radio link; and transmitting, by the wireless communication node, an indication of recovery of the radio link in response to detecting recovery of the radio link, to the second node, after transmitting the indication of the degradation of the radio link.