Uplink Resource Request Logic for Wireless Communication Systems
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Solution Overview
Problem
In wireless communication systems, efficiently requesting uplink resources, such as UL-SCH resources, is challenging due to limitations in existing methods for scheduling requests and random access procedures, particularly when SR resources are not adequately allocated or available.
Innovation Solution
A method and device for user equipment (UE) to configure multiple logical channels, trigger a scheduling request (SR) on a first logical channel, and initiate a random access procedure if no SR resource is available for the first logical channel and no SR transmission is ongoing on a second logical channel, allowing for efficient resource allocation and request management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a Scheduling Request (SR) is triggered on a first logical channel but no SR resource is available, then uplink resource allocation is delayed, but initiating a random access procedure increases access overhead and latency
Solution Approach 1:
The patent applies dynamics by making the random access procedure conditional rather than static. The UE dynamically decides whether to initiate random access based on real-time conditions: whether an SR resource exists for the first logical channel and whether SR transmission is ongoing on a second logical channel. This conditional mechanism optimizes the balance between reliable resource allocation and minimizing access latency.
Solution Approach 2:
The patent changes the parameter of SR resource availability by introducing multiple logical channels with different SR resource configurations. When the first logical channel lacks an SR resource, the system evaluates the state of the second logical channel's SR transmission to determine the appropriate action, effectively changing the resource allocation parameter based on system state.
2Productivity
If multiple logical channels are configured with SR resources, then SR transmission efficiency improves, but resource management complexity increases
Solution Approach 1:
The patent segments the SR resource allocation by assigning different SR resources to different logical channels. This segmentation allows independent SR transmission for each logical channel, improving overall SR transmission efficiency while enabling granular resource management. The UE can trigger SR on specific logical channels without affecting others, reducing the impact of management complexity.
Solution Approach 2:
The patent implements multi-functionality by configuring multiple logical channels that can each independently utilize SR resources. This universal approach allows the SR mechanism to serve multiple logical channels simultaneously, improving transmission efficiency while distributing the management burden across standardized channel configurations.
3Reliability
If random access procedure is initiated whenever SR resource is unavailable, then uplink resource request reliability improves, but system overhead and access conflict increase
Solution Approach 1:
The patent applies preliminary anti-action by preventing unnecessary random access procedures through conditional evaluation. Before initiating random access, the UE checks whether an SR resource is available for the first logical channel and whether SR transmission is ongoing on the second logical channel. This preliminary check avoids premature random access, reducing access conflicts and system overhead while maintaining reliable resource request mechanisms.
Data Source
AI summary
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for configuring multiple logical channels; triggering a scheduling request (SR) associated with a first logical channel of the multiple logical channels; and if there is no SR resource corresponding to the first logical channel and if there is no on-going SR transmission on an SR resource corresponding to a second logical channel, initiating a random access procedure.