Enhanced Uplink RAB Configuration via Segmented Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for improving uplink coverage, throughput, and transmission latency in wireless communication systems, such as those in the 3GPP, face challenges in efficiently managing uplink resources, as the Radio Network Controller (RNC) lacks the ability to make short-term decisions efficiently, while needing to retain coarse control over enhanced uplink radio access bearers (RABs).
Innovation Solution
The system configures enhanced dedicated channels (E-DCH) between Wireless Transmit/Receive Units (WTRU) and Node-Bs, with the RNC maintaining overall control through EU RAB parameters like transport format combinations, modulation and coding schemes, and maximum transmit power, while the WTRU and Node-B report traffic and performance statistics for dynamic adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If control of uplink radio resources is moved from RNC to Node-B, then short-term scheduling efficiency is improved, but RNC loses fine-grained control capability
Solution Approach 1:
The patent segments the uplink control function into two parts: Node-B handles short-term scheduling and resource allocation, while RNC retains coarse control over transport format combinations, modulation schemes, and maximum power. This segmentation resolves the contradiction by assigning different time scales and control granularities to different nodes.
Solution Approach 2:
The patent implements feedback mechanisms where Node-B reports scheduling statistics and performance metrics back to RNC, allowing RNC to adjust coarse parameters based on actual performance. This feedback loop enables RNC to maintain overall control while Node-B operates with local autonomy for short-term decisions.
2Device complexity
If RNC retains coarse control of EU RAB, then overall control capability is maintained, but short-term resource optimization is reduced
Solution Approach 1:
The patent creates a dynamic control architecture where the RNC-configured parameters can be adjusted based on real-time feedback from Node-B scheduling statistics. This allows the system to adapt between coarse and fine control levels dynamically, optimizing both architectural simplicity and throughput performance.
3Loss of time
If Node-B manages uplink radio resources, then transmission latency is reduced, but RNC control flexibility is limited
Solution Approach 1:
The patent applies preliminary action by having RNC pre-configure transport format combinations, modulation and coding schemes, and power parameters before actual data transmission. This allows Node-B to make rapid short-term scheduling decisions without needing real-time reconfiguration from RNC, reducing latency while maintaining RNC's configuration flexibility through advance parameter setup.
Data Source
AI summary
A wireless communication method and system for controlling an enhanced uplink (EU) radio access bearer (RAB). The wireless communication system includes at least one wireless transmit/receive unit (WTRU), at least one Node-B and a radio network controller (RNC). The RNC configures an EU RAB to operate on an enhanced dedicated channel (E-DCH). At least one of the WTRU and the Node-B report EU traffic statistics and EU performance statistics to the RNC. The RNC then adjusts the configuration of the EU RAB in accordance with the received EU traffic statistics, the EU performance statistics, and information collected by the RNC itself.