Macro eNB Bearer Transfer to CSG Local eNB Access Control
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Solution Overview
Problem
In layered network deployments, user plane bearers often fail to transfer successfully when the target local eNB is a Closed Subscriber Group (CSG) local eNB, leading to degraded reception and transmission services for UE, as existing methods do not adequately manage access permissions and Quality of Service (QoS) for non-CSG members.
Innovation Solution
A method and device for transferring bearers in layered network deployments, where a macro eNB determines whether to allow UE access to a CSG local eNB based on CSG membership status and initiates a bearer transfer procedure only if access is permitted, ensuring that the UE is a member of the CSG by using CSG membership status information and access mode information exchanged with the MME to manage bearer transfers effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If bearer transfer is attempted to CSG local eNB without access permission verification, then bearer transfer speed is improved, but bearer transfer reliability deteriorates due to access rejection
Solution Approach 1:
The macro eNB performs preliminary access permission verification by checking CSG membership status information before initiating the bearer transfer procedure. This preliminary action prevents subsequent access rejections and ensures reliable bearer transfer to authorized UEs only.
Solution Approach 2:
The patent introduces CSG membership status information as an intermediary verification mechanism between the macro eNB and CSG local eNB. This intermediary check mediates the bearer transfer process by providing access permission validation without requiring direct complex authentication between eNBs.
2Reliability
If access permission verification is performed before bearer transfer, then bearer transfer reliability is improved, but system complexity increases due to additional verification steps
Solution Approach 1:
The UE provides its own CSG membership status information to the macro eNB, enabling self-service verification. The macro eNB simply checks the provided membership status without needing to initiate complex authentication procedures, thus reducing system complexity while maintaining reliability.
Solution Approach 2:
The access permission verification is performed as a preliminary check using readily available CSG membership status information, rather than implementing complex real-time authentication during the bearer transfer process. This preliminary verification approach simplifies the overall system architecture.
3Productivity
If bearer transfer procedure is initiated without checking CSG membership, then productivity is improved, but service quality deteriorates due to unauthorized access
Solution Approach 1:
The macro eNB performs a quick preliminary check of CSG membership status information before initiating bearer transfer. This preliminary action filters out unauthorized UEs early in the process, maintaining high productivity for authorized UEs while ensuring service quality through access control.
Solution Approach 2:
The patent applies different access control policies based on local conditions - authorized UEs with valid CSG membership status receive priority bearer transfer service, while unauthorized UEs are rejected. This local quality differentiation maintains efficiency for legitimate users while ensuring service quality through selective access control.
Data Source
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AI summary
A method and apparatus for transferring bearing in a layered network are disclosed in the embodiments of the present application, which relate to wireless communications field and are used to avoid failure when transferring bearing in user layer so as to improve communications quality of users. In the present application, after judging the need for transferring a Data Wireless Bearing DRB of a terminal to a Closed Subscriber Group CSG Local eNB, a Macro eNB determines whether to allow the terminal to access the CSG Local eNB and initiates a bearing transferring process to the CSG Local eNB if so. The CSG Local eNB accepts a bearing transferring request carrying CSG member status information of the terminal sent by the Macro eNB and implements accessing control for the separated bearing of the terminal according to the CSG member status information. Thus it can be seen said problems can be avoided.