Uplink Collision Handling via Threshold Delay Cancellation

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Solution Overview

Problem

In wireless communication systems, uplink collisions between high and low priority transmissions can lead to interference and network traffic inefficiencies, as existing technologies lack effective methods to prioritize and manage these collisions based on user equipment (UE) processing capabilities and minimum processing timelines.

Innovation Solution

A method and apparatus for a user equipment (UE) to identify collisions between high and low priority uplink transmissions and cancel the low priority transmission before an overlapping symbol based on a threshold delay period, which is determined by the UE's processing capability and minimum processing timeline capability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If uplink transmissions of different priorities are allowed to proceed simultaneously, then network traffic throughput is improved, but transmission reliability deteriorates due to collisions and interference

Engineering Contradiction:

Improvenetwork traffic throughputVSAvoidtransmission reliability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies preliminary action by calculating a threshold delay period before the first overlapping symbol of colliding uplink transmissions, and canceling the low priority transmission in advance based on this threshold. This preemptive cancellation prevents the collision from occurring, ensuring high priority transmission reliability while still allowing the system to support multiple uplink transmissions for maintaining network throughput.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If low priority transmissions are canceled to avoid collisions, then transmission reliability is improved, but network traffic efficiency deteriorates

Engineering Contradiction:

Improvetransmission reliabilityVSAvoidnetwork traffic efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent applies parameter changes by dynamically adjusting the threshold delay period based on UE processing capability and minimum processing timeline capability. This allows the system to optimize the cancellation timing parameter to balance reliability (by preventing collisions) and productivity (by minimizing unnecessary cancellations and maintaining efficient network traffic flow).

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent applies dynamics by making the threshold delay period adaptive rather than fixed. The threshold is determined based on UE-specific processing capabilities and can be adjusted according to different service types and channel conditions, allowing the system to dynamically balance between preventing collisions and maintaining network efficiency.

Inventive Principle:

Principle #15Dynamics

3Reliability

If collision cancellation is implemented, then transmission reliability is improved, but device complexity increases due to additional processing requirements

Engineering Contradiction:

Improvetransmission reliabilityVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies self-service by enabling the UE to autonomously determine and execute collision cancellation without requiring complex network coordination. The UE calculates the threshold delay period based on its own processing capability and minimum processing timeline capability, and independently cancels low priority transmissions, reducing the need for complex network-side control mechanisms.

Inventive Principle:

Principle #25Self-service

4Reliability

If threshold delay period is reduced for early cancellation, then transmission reliability is improved, but processing time availability deteriorates

Engineering Contradiction:

Improvetransmission reliabilityVSAvoidprocessing time availability

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies parameter changes by optimizing the threshold delay period parameter to be the minimum time required for UE processing based on its capability and the minimum processing timeline capability. This ensures the threshold is short enough to provide early cancellation and improve reliability, but long enough to preserve necessary processing time availability.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11792856B2Uplink collision handling

Publication Date: 2023.10.17 QUALCOMM INC

AI summary

The present disclosure generally relates to wireless communication. In some aspects, a user equipment (UE) may identify a collision between a first uplink transmission and a second uplink transmission, wherein the first uplink transmission is a high priority uplink transmission and the second uplink transmission is a low priority uplink transmission; and cancel the second uplink transmission based at least in part on a threshold delay period, wherein the threshold delay period is based at least in part on a UE processing capability and a minimum processing timeline capability, and wherein the second uplink transmission is canceled before a first overlapping symbol of the first uplink transmission and the second uplink transmission. Numerous other aspects are provided.