Scheduling Request Priority Handling in 5G Uplink Control

Solution Overview

Problem

In 5G communication systems, the transmission of Scheduling Requests (SR) can be delayed when SR resources overlap with Uplink Shared Channel (UL-SCH) resources, particularly affecting emergency services that require timely data transmission.

Innovation Solution

The method involves receiving priority indication information from a network device to instruct the physical layer to transmit SRs on specific Physical Uplink Control Channel (PUCCH) resources based on priority indications, ensuring that SRs are transmitted before UL-SCH data when the SR resource overlaps with UL-SCH transmission resources, thereby prioritizing emergency services.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If SR resources are allocated periodically for UE to transmit scheduling requests, then resource allocation efficiency is improved, but SR transmission timing cannot be guaranteed when SR resource overlaps with UL-SCH transmission resource

Engineering Contradiction:

Improveresource allocation efficiencyVSAvoidSR transmission delay

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by having the UE trigger the SR before the actual data transmission is needed. The SR is transmitted in advance on the PUCCH resource, allowing the network device to allocate UL-SCH resources beforehand. This ensures that when data transmission time arrives, the SR has already been processed and resources allocated, preventing SR transmission delay even when SR resource timing overlaps with UL-SCH resource allocation timing.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If UE transmits SR on overlapping resource with UL-SCH, then resource utilization is improved, but SR transmission priority cannot be ensured

Engineering Contradiction:

Improveresource utilizationVSAvoidSR transmission priority

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies local quality by assigning different priorities to different SR transmissions based on their nature. Critical SR transmissions (such as those triggering by buffer status reports indicating urgent data) are given higher priority than non-critical SR transmissions. The network device uses this priority information to make local decisions about which SR to process first when resources overlap, ensuring that SR transmission priority is maintained while still allowing resource overlap for efficiency.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent applies dynamics by making the SR transmission process adaptive rather than rigid. The UE dynamically determines when to trigger SR based on buffer status and transmission needs. The network device dynamically adjusts UL-SCH resource allocation based on SR priority and timing conditions. This dynamic approach allows the system to optimize resource utilization while ensuring SR priority for critical transmissions.

Inventive Principle:

Principle #15Dynamics

3Manufacturing precision

If network device waits for SR before allocating UL-SCH resource, then resource allocation accuracy is improved, but transmission time for SR is delayed

Engineering Contradiction:

Improveresource allocation accuracyVSAvoidSR transmission time

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The patent applies preliminary action by having the UE trigger the SR before the actual data transmission is needed. The SR is transmitted in advance on the PUCCH resource, allowing the network device to allocate UL-SCH resources beforehand. This ensures that when data transmission time arrives, the SR has already been processed and resources allocated, preventing SR transmission delay even when SR resource timing overlaps with UL-SCH resource allocation timing.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12262408B2Information transmission method, configuration method, terminal and network device

Publication Date: 2025.03.25 DATANG MOBILE COMM EQUIP CO LTD

AI summary

An information transmission method, an information configuration method, a terminal, and a network device are provided. The information transmission method includes receiving priority indication information transmitted by a network device, and instructing a physical layer to send a target SR on a target PUCCH resource according to the priority indication information; wherein the priority indication information includes one of following: first information, the first information being logical channel priority information; second information for indicating a priority of SR configuration; third information for indicating relationship between a priority of SR configuration and a priority of UL-SCH transmission.