Recurring Scheduling Request Resource Sharing in SC-FDMA Uplink
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current scheduling request mechanisms in LTE wireless communication systems face challenges with high access latency and inefficient resource utilization, particularly as the number of connected-mode users increases, leading to suboptimal resource allocation and reduced system capacity.
Innovation Solution
Implementing a method that assigns recurring scheduling request resources to user equipment (UE) for transmitting user IDs on shared SC-FDMA uplink shared channel signals, allowing multiple users to share resources and reducing the need for dedicated SR resources, thereby enhancing resource efficiency and lowering access latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If dedicated scheduling request resources are allocated to each user, then access latency is reduced, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent merges multiple users' scheduling request transmissions into a shared uplink resource pool. Instead of allocating dedicated resources to each user, multiple users share the same time-frequency resources for SR transmissions, allowing the system to serve more users with fewer total resources while maintaining acceptable access latency through collision resolution mechanisms
Solution Approach 2:
The patent creates universal shared uplink resources that can be used by any user for scheduling requests. The shared resource pool serves multiple functions: carrying SR transmissions from multiple users, enabling dynamic resource allocation, and supporting both granted and ungranted SR scenarios, thereby improving overall resource utilization efficiency
2Quantity of substance
If the number of connected-mode users increases, then system capacity is improved, but resource allocation efficiency deteriorates
Solution Approach 1:
The patent implements dynamic resource allocation where the scheduler can dynamically grant or deny SR resources to users based on current system conditions, user activity patterns, and resource availability. This dynamic approach allows the system to adapt to varying user loads and maintain efficient resource allocation even as the number of connected users increases
Solution Approach 2:
The patent changes the resource allocation parameter from fixed dedicated assignments to flexible shared pool allocations. By modifying how resources are distributed - using shared time-frequency resources with dynamic granting - the system can support a larger number of connected users while maintaining or improving resource allocation efficiency
3Reliability
If dedicated SR resources are assigned to each user, then scheduling reliability is improved, but system capacity deteriorates
Solution Approach 1:
The patent implements feedback mechanisms where the base station receives SR transmissions from multiple users on shared resources, determines which users require uplink resources, and sends back scheduling grants accordingly. This feedback loop ensures reliable scheduling decision-making even when multiple users share the same resources, maintaining scheduling reliability while increasing system capacity
Solution Approach 2:
The patent introduces a shared resource pool as an intermediary between users and the scheduling system. Instead of direct dedicated user-to-resource mappings, users transmit SRs through the shared pool, and the base station mediates the allocation process, enabling more users to be served within the same resource constraints
Data Source
AI summary
In some implementations, a method implemented in user equipment UE for use in a wireless system for single carrier frequency division multiple access SC-FDMA includes receiving an assignment of a recurring scheduling request resource from within the wireless system. Information is transmitted on an instance of the assigned recurring scheduling request resource within an SC-FDMA uplink shared channel signal wherein said information comprises a user ID.