Group Scheduling Requests to Reduce Uplink Signaling Overhead
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Solution Overview
Problem
Existing wireless communication systems face increased uplink and downlink control signaling overhead, latency, and collisions due to individual UE scheduling requests, particularly in group transmissions.
Innovation Solution
Implement group scheduling requests where a UE sends a scheduling request for a group of devices, with the base station responding with a group common downlink control information indicating allocated uplink resources, allowing simultaneous data transmission by multiple UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual UE scheduling requests are used, then each UE can request uplink resources independently, but control signaling overhead and latency increase
Solution Approach 1:
The patent combines multiple individual UE scheduling requests into a single group scheduling request. The base station configures a group of UEs to share common uplink resources, and a representative UE (or multiple UEs) sends a unified scheduling request on behalf of the group. This merging approach reduces the total number of scheduling requests transmitted over the air interface, thereby reducing control signaling overhead and latency while maintaining the ability of each UE to request resources independently through group-based coordination.
2Measurement precision
If individual UE scheduling requests are used, then resource allocation is precise for each UE, but control signaling overhead increases
Solution Approach 1:
The patent merges individual resource allocation requests into a group-based resource allocation mechanism. The base station allocates common uplink resources to a group of UEs through a single group scheduling assignment, reducing the quantity of control signaling messages. Each UE within the group can still achieve precise resource allocation by monitoring the group common downlink control information and determining its specific resource assignment based on group-based indexing or pre-configured rules.
3Reliability
If individual UE scheduling requests are used, then each UE gets dedicated resource allocation, but collision rates increase
Solution Approach 1:
The patent combines multiple individual scheduling requests into a coordinated group scheduling approach. By having UEs within a group share common uplink resources and use coordinated resource selection mechanisms (such as group-based resource indexing or pre-configured resource patterns), the system reduces the probability of random access collisions. The base station manages group-level resource coordination, ensuring that UEs within the group can access resources in an organized manner that minimizes collisions while maintaining dedicated resource allocation capabilities.
4Productivity
If group scheduling requests are implemented, then control signaling overhead and latency are reduced, but individual UE resource request capability must be coordinated
Solution Approach 1:
The patent segments the scheduling coordination function into group-level and UE-level operations. At the group level, the base station manages common resource allocation and receives unified scheduling requests, improving network efficiency. At the UE level, each UE maintains simplified resource request capabilities through pre-configured group parameters and indexing rules. This segmentation reduces the coordination complexity for individual UEs while achieving overall group-based scheduling efficiency.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit a scheduling request to a base station using the dedicated uplink resources. The UE may transmit the scheduling request to indicate that a group of UEs requests uplink resources for an uplink data transmission. As a result, the UE may receive downlink control information from a base station which includes corresponding uplink resources allocated to the UE based on the scheduling request. The UE may use the allocated uplink resources to transmit uplink data to the base station.