WTRU Enhanced Uplink Scheduling Grant Processing
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently detecting and decoding enhanced uplink scheduling grants, which are crucial for the performance of third generation partnership project (3GPP) systems, particularly in managing power ratios and activating/deactivating H-ARQ processes.
Innovation Solution
A method and apparatus for processing enhanced uplink scheduling grants, where a WTRU detects and decodes absolute and relative grants, generating a new scheduling grant based on primary or secondary AG modes, and adjusts power ratios using a scheduling grant processor that includes calculators and a controller to manage H-ARQ processes effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the WTRU monitors and processes both primary and secondary AG modes with multiple H-ARQ processes, then the system supports flexible scheduling and resource allocation, but the complexity of detecting and decoding scheduling grants increases
Solution Approach 1:
The patent segments the H-ARQ processes into multiple independent processes (first H-ARQ process and second H-ARQ process), each associated with different AG values and activation flags. This segmentation allows the system to handle different scheduling scenarios independently, improving adaptability while managing complexity through modular processing of each H-ARQ process separately.
Solution Approach 2:
The patent implements dynamic switching between primary and secondary AG modes based on the activation flag values. The system can dynamically activate or deactivate specific H-ARQ processes and switch between different AG reception modes (primary AG only, secondary AG only, or both), allowing flexible adaptation to varying scheduling requirements while optimizing processing complexity based on current operational needs.
2Productivity
If the system activates multiple H-ARQ processes with different AG values, then resource allocation efficiency improves, but the difficulty of detecting and decoding scheduling grants increases
Solution Approach 1:
The patent introduces an intermediary mechanism in the form of a serving RLS (Radio Link Set) that mediates between the Node-B and the WTRU for grant transmission. The serving RLS provides a structured interface for receiving and processing AGs, organizing the complex grant information into manageable formats that improve detectability while enabling efficient resource allocation across multiple H-ARQ processes.
Solution Approach 2:
The system performs preliminary configuration of H-ARQ processes and AG reception modes before actual data transmission begins. The WTRU is pre-configured with multiple H-ARQ processes, their associated AG values, and activation flags, allowing the system to quickly switch between different resource allocation modes without requiring complex real-time detection and decoding during active transmission.
3Reliability
If the Node-B sends multiple types of grants (primary AG and secondary AG) with different activation flags, then the system achieves better interference management and power control, but the device complexity for processing these grants increases
Solution Approach 1:
The patent applies local quality by assigning different AG values and activation flags to specific H-ARQ processes based on their individual requirements. Each H-ARQ process can have its own AG value (e.g., first AG value for first process, second AG value for second process) and activation status, allowing precise power control and resource allocation tailored to local needs of each process while managing overall system complexity through this localized approach.
Data Source
AI summary
A method for generating a serving grant at a wireless transmit/receive unit is disclosed. An absolute grant channel signal is decoded to obtain an absolute grant from a serving cell. A relative grant channel signal is decoded to obtain a relative grant from a serving radio link set and a relative grant from a non-serving radio link. A first serving grant candidate is generated based on the absolute grant from the serving cell or the relative grant from the serving radio link set. A second serving grant candidate is generated based on the relative grant from the non-serving radio link. The serving grant is generated based on the first serving grant candidate and the second serving grant candidate.