Core Network Access Information Acquisition During H(e)NB Handover
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Solution Overview
Problem
During handover processes in H(e)NB systems, the core network lacks access information about user equipment (UE), particularly in scenarios where access control is implemented on the RAN side, leading to incomplete knowledge of UE membership and access cell information, especially during intra-GW handovers.
Innovation Solution
A method and system where the destination HNB or HeNB gateway transmits membership information to the core network through specific messages during handover processes, ensuring the core network receives access information, including membership and cell identity, even when access control is not performed by the core network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If access control is implemented on the RAN side during handover, then the H(e)NB can control UE access effectively, but the core network cannot obtain UE access information
Solution Approach 1:
The patent implements a feedback mechanism where the destination H(e)NB GW sends UE access information (membership status and CSG ID) back to the core network through the handover response message. This feedback loop ensures that while access control is maintained at the RAN side, the core network receives the necessary information about UE membership status and access cell identity, resolving the information loss problem.
Solution Approach 2:
The patent uses the H(e)NB GW as an intermediary entity that bridges the gap between the RAN side access control and core network information needs. The GW collects access information from the destination H(e)NB and transmits it to the core network, acting as a mediator that enables information flow without compromising access control effectiveness.
2Device complexity
If the core network does not perform access control, then the handover process is simplified, but the core network lacks knowledge of UE membership status
Solution Approach 1:
Even when the core network does not perform access control decisions, the patent ensures that UE membership information is fed back to the core network through the handover response. This allows the core network to maintain simplified procedures while still obtaining knowledge of UE membership status and access cell information for billing and service differentiation purposes.
3Speed
If intra-GW handover is used, then handover speed is improved, but the core network cannot obtain access information of the UE
Solution Approach 1:
The patent addresses the intra-GW handover information loss by using the H(e)NB GW as an intermediary. Even in fast intra-GW handovers where the core network is not directly involved in the handover decision, the GW collects access information from the destination H(e)NB and makes it available to the core network, maintaining information flow without sacrificing handover speed.
Data Source
AI summary
The present invention discloses a method for a core network to obtain user access information during a handover procedure, which includes: when the user handovers between HNBs or HeNBs and the core network does not carry out access control of the user, if the destination HeNB is connected to the core network directly or the user which does not support a closed subscriber group handovers to a hybrid destination HNB, the network element which controls the access of the user transmitting membership information of the user to the core network. The invention also discloses a corresponding system. The invention realizes that under the condition that the RAN side controlling the access of the UE during the handover process and the CN cannot know the membership of the UE, the RAN side notifying the core network of the membership information of the UE and the information of the H(e)NB.