Network Handover Processing via Context ID Verification
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Solution Overview
Problem
In wireless communication systems, radio link failures between a User Equipment (UE) and a Source eNodeB (S-eNB) during handover processes lead to delays and wastage of system resources, as the handover process is interrupted and resources are not efficiently managed.
Innovation Solution
The Target eNodeB (T-eNB) verifies the presence of UE context information by matching the Cell Radio Network Temporary Identifier (C-RNTI) and source cell identity sent by the S-eNB, allowing it to continue the handover process even if the radio link fails, by sending relevant parameters like air interface resource configuration and security parameters to the UE through cell update messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the S-eNB sends a handover request message to the T-eNB and the radio link between the S-eNB and the UE fails during handover preparation, then the handover process is interrupted and the UE must change state, but this leads to handover delays and system resource wastage
Solution Approach 1:
The T-eNB pre-allocates resources and reserves C-RNTI before the handover is fully executed. This preliminary resource preparation allows the UE to immediately access the target cell without waiting for resource allocation after handover, reducing handover delay and ensuring continuity even if the radio link fails during the transition.
Solution Approach 2:
The patent introduces a context ID as an intermediary identifier that the UE sends to the T-eNB to verify whether the T-eNB is the selected target. This intermediary mechanism enables the UE to quickly identify the correct target cell and resume handover without full state changes, reducing both delay and resource wastage.
2Ease of operation
If the UE changes state during handover due to radio link failure, then the handover process is interrupted, but this causes system resources to be wasted due to reconfiguration
Solution Approach 1:
The UE autonomously determines whether the T-eNB is the selected target by sending the context ID and receiving verification. This self-service mechanism allows the UE to independently resume handover without requiring S-eNB intervention or full state reconfiguration, reducing system resource wastage while maintaining operation continuity.
Solution Approach 2:
The patent replaces the traditional mechanical state change and reconfiguration process with a lightweight context verification mechanism using context ID matching. This substitution eliminates the need for full resource reconfiguration when radio link fails, reducing energy consumption and resource wastage while maintaining handover continuity.
3Productivity
If the T-eNB verifies UE context information by matching C-RNTI and source cell identity, then the handover can continue smoothly, but this requires additional verification steps
Solution Approach 1:
The patent extracts only the essential verification elements (context ID, C-RNTI, source cell identity) from the complete UE context, allowing the T-eNB to verify handover continuity with minimal data exchange. This extraction approach maintains high processing efficiency while avoiding the complexity of verifying entire context sets.
Solution Approach 2:
The patent changes the verification parameter from complete context information to a condensed context ID that uniquely identifies the UE's handover state. This parameter transformation simplifies the verification process at the T-eNB while maintaining the ability to continue handover smoothly, balancing efficiency and complexity.
Data Source
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AI summary
A communication system, a network handover processing method and a network handover processing apparatus are disclosed. The method includes the following steps: A Target Evolved NodeB (T-eNB) receives ID information sent from a User Equipment (UE), where the ID information is allocated for the UE by a Source Evolved NodeB (S-eNB); if the T-eNB has ID information the same as the ID information sent from the UE, the T-eNB sends parameters allocated for the UE to the UE and continues the handover process. The apparatus includes a receiving module and a sending module. The communication system includes a UE, an S-eNB and a T-eNB. The communication system, network handover processing method and network handover processing apparatus can reduce the state change times of the UE in the network handover process and save the system resources.