Home Node B Gateway U-RNTI Database Management
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Solution Overview
Problem
In wireless communication systems, particularly in home node B access networks, the lack of a centralized management system for unique radio network identifiers (U-RNTI) leads to issues during UE relocation, as HNBs operate independently, resulting in non-uniqueness and inefficiencies in U-RNTI assignment and management.
Innovation Solution
A method and apparatus for maintaining a database of unique radio network identifiers within a Home Node B Gateway, where U-RNTI values are associated with radio node identifiers, ensuring uniqueness and managing their allocation and availability across the network, enabling efficient UE context relocation and reducing delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If HNBs operate independently without centralized management, then device complexity is reduced at individual nodes, but identifier uniqueness and network reliability deteriorate
Solution Approach 1:
The HNB-GW acts as an intermediary between HNBs and the core network, centrally managing U-RNTI allocation. The gateway maintains a database that tracks which U-RNTIs are assigned to which HNBs, ensuring uniqueness across the entire network while allowing individual HNBs to operate with simplified logic for generating and using identifiers.
Solution Approach 2:
The system divides U-RNTI management responsibilities: individual HNBs handle local generation and usage of identifiers, while the HNB-GW handles centralized tracking and coordination. This segmentation allows distributed operation at the network edge with centralized oversight for uniqueness guarantees.
2Productivity
If HNBs generate U-RNTI independently, then allocation speed is improved, but identifier collision and management efficiency worsen
Solution Approach 1:
The HNB-GW receives feedback from HNBs about U-RNTI allocation status and maintains an updated database of assigned identifiers. When an HNB needs to allocate a U-RNTI, it can query the gateway or use previously allocated identifiers, ensuring no collisions occur while maintaining efficient local operation.
Solution Approach 2:
The system performs preliminary U-RNTI allocation through the HNB-GW before HNBs need to use them. The gateway can pre-allocate and distribute batches of U-RNTIs to HNBs, allowing fast local allocation without real-time communication during actual connection establishment.
3Reliability
If centralized database management is implemented, then network control and reliability are improved, but system complexity and information storage requirements increase
Solution Approach 1:
The HNB-GW performs multiple functions: it acts as a gateway to the core network, manages U-RNTI allocation and tracking, coordinates between HNBs and UEs, and maintains the centralized database. This multi-functionality consolidates complexity into a single dedicated node rather than distributing it across multiple components.
Data Source
AI summary
A method including maintaining a database of unique radio network identifiers within a home node B gateway, wherein the unique radio network identifier uniquely identifies the radio network termination point of user equipment attached to a radio node controlled by the home node B gateway.