Multicast Tunnel Identifier Assignment in LTE Core Network
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Solution Overview
Problem
The current 3GPP-LTE mobile communication system faces challenges in managing a large number of TEIDs for multicast data, leading to increased memory requirements and complex processing in the core network when deploying MBMS services across multiple base stations, as each base station independently assigns TEIDs without coordination.
Innovation Solution
A mobile communication system where the core network assigns a common tunnel identifier for multicast data distribution, notifying it to the access network, which captures the corresponding radio channel and transmits the data to terminals, thereby simplifying the management of TEIDs and reducing memory requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If each base station independently assigns TEIDs for multicast data, then the access network can manage its own resources autonomously, but the core network must manage a large number of TEIDs leading to increased memory requirements and complex processing
Solution Approach 1:
The patent merges the TEID assignment function from individual base stations into a centralized assignment mechanism. Instead of each base station independently assigning TEIDs, the system consolidates TEID management so that a single TEID is assigned per multicast service, eliminating the need for the core network to manage multiple TEIDs across different base stations.
Solution Approach 2:
The patent extracts the TEID assignment function from the access network and relocates it to a centralized management point. By removing the independent TEID assignment capability from individual base stations, the system eliminates the proliferation of TEIDs in the core network while maintaining autonomous resource management through a different mechanism.
2Adaptability or versatility
If each base station independently assigns TEIDs for multicast data, then local flexibility is maintained, but memory requirements in the core network increase due to managing multiple TEIDs
Solution Approach 1:
The patent combines multiple TEIDs into a single TEID representation at the core network level. By merging the identification functions and using a unified TEID assignment, the system reduces memory requirements in the core network while preserving local flexibility through service-based rather than base-station-specific identification.
3Device complexity
If a common TEID is assigned by the core network for multicast data, then TEID management is simplified and memory requirements are reduced, but the access network loses independent TEID assignment capability
Solution Approach 1:
The patent extracts the TEID assignment function from the access network and relocates it to a centralized management point. This extraction simplifies core network management while the access network maintains operational autonomy through service-based resource allocation rather than TEID-based management.
Solution Approach 2:
The patent introduces a centralized TEID assignment mechanism as an intermediary between the core network and access network. This intermediary layer manages TEID allocation centrally, simplifying core network operations while allowing access network elements to maintain their autonomous resource management capabilities through service-level abstraction.
Data Source
AI summary
A core network apparatus notifies a piece of identification information on each service for receiving multicast data in a down link to an access network apparatus. The access network apparatus receives the piece of the identification information notified from the core network apparatus to capture a radio channel for the service identified by the piece of the identification information. The core network apparatus transmits the multicast data to the access network apparatus in a receivable form on the basis of the piece of the identification information. The access network apparatus receives the multicast data transmitted from the core network apparatus on the basis of the piece of the identification information and transmits the received multicast data to terminals over the radio channel.