Preconfigured MAC-e/es Entities for E-DCH Resource Management
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Solution Overview
Problem
The existing enhanced uplink mechanism for 3GPP standards faces challenges in defining how and when to set up enhanced MAC-e/es entities, managing E-DCH resources, and determining the location and type of these entities, particularly in the Cell_FACH state, where E-DCH resources are assigned by a Node-B and require additional RNC to Node-B interface signaling for setup and management.
Innovation Solution
The solution involves preconfiguring enhanced MAC-e and MAC-es entities as common entities for each E-DCH resource set assigned during an E-RACH access procedure, with the CRNC and Node-B configuring and storing these entities to manage and setup resources efficiently, and using Iub signaling to establish the correct forwarding addresses for data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If enhanced MAC-e/es entities are configured separately for each WTRU in Node-B and SRNC, then real-time critical functionality can be placed in Node-B, but device complexity and setup management become more complex
Solution Approach 1:
The enhanced MAC entity is segmented into two separate functional parts: enhanced MAC-e in Node-B handling real-time critical functions, and enhanced MAC-es in SRNC handling non-real-time functions. This segmentation allows each part to be optimized independently while maintaining overall system reliability.
Solution Approach 2:
A common enhanced MAC-e/es entity is introduced as an intermediary configuration that can be shared across multiple WTRUs. This common entity acts as a template that simplifies setup and management, reducing the complexity of configuring individual entities for each WTRU while maintaining the functional separation between Node-B and SRNC.
2Ease of operation
If common enhanced MAC-e/es entities are preconfigured for each E-DCH resource set, then setup and management is simplified, but additional RNC to Node-B interface signaling is required
Solution Approach 1:
Common enhanced MAC-e/es entities are preconfigured in both Node-B and SRNC before actual WTRU connections are established. This preliminary configuration stores template entities that can be quickly instantiated when WTRUs need E-DCH resources, significantly simplifying setup and management operations.
Solution Approach 2:
The preconfigured common enhanced MAC-e/es entities serve as templates that are copied and instantiated when WTRUs require E-DCH resources. Instead of creating unique entities for each WTRU, the system copies the preconfigured template, reducing configuration complexity while managing signaling through efficient replication.
3Adaptability or versatility
If separate enhanced MAC-e and MAC-es entities are used in Node-B and SRNC, then functional separation is achieved, but resource allocation and data forwarding management becomes more difficult
Solution Approach 1:
The common enhanced MAC-e/es entity design provides universality by creating a standardized template that functions consistently across both Node-B and SRNC. This universal template maintains functional separation while ensuring consistent behavior and simplified resource allocation procedures across different network elements.
Solution Approach 2:
The system implements feedback mechanisms where the common enhanced MAC-e/es entity configuration in Node-B is synchronized with SRNC through Iub interface signaling. This feedback ensures that both sides have consistent entity configurations, simplifying resource allocation and data forwarding management while maintaining functional separation.
Data Source
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AI summary
A method and apparatus are disclosed to manage the enhanced medium access control-e (MAC-e) and enhanced MAC-es resources and respective variables for the enhanced dedicated channel (E-DCH) in the enhanced Cell_FACH state. Due to the nature of the E-DCH transmission in the uplink (UL) in the Cell_FACH state and the fact that a wireless transmit/receive unit (WTRU) might set up and release the E-DCH resources more frequently, methods to deal with the TSN numbering are described.