Wireless Device WAN V2X Transmission Priority Dropping

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Solution Overview

Problem

There is a need for a protocol to prioritize and manage overlapping wide area network (WAN) communication and vehicle-to-X (V2X) communication in wireless devices, as existing technologies do not effectively handle the synchronization and priority between these two communication types when they overlap.

Innovation Solution

A method where a wireless device schedules data transmissions using WAN communication in one subframe and V2X communication in another, offset by a Direct Frame Number (DFN) offset, and determines which transmission to drop based on priority comparisons and power considerations, ensuring that if WAN communication has higher priority, it is maintained unless the DFN offset exceeds the last symbol length of the V2X subframe, and vice versa.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the wireless device schedules both WAN communication and V2X communication in overlapping subframes, then communication coverage and functionality are improved, but transmission conflicts and data loss occur

Engineering Contradiction:

Improvecommunication coverageVSAvoidtransmission reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies preliminary action by determining the DFN offset value in advance before scheduling transmissions. The offset is calculated based on the last symbol length of V2X subframe and the subframe number, allowing the system to pre-identify potential overlapping conflicts and apply appropriate dropping rules before the conflict occurs, thereby maintaining transmission reliability while supporting both communication types

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent changes the parameter of subframe timing by introducing a DFN offset that adjusts the V2X transmission timing relative to WAN transmission. By dynamically adjusting this offset parameter based on last symbol length and subframe number, the system resolves transmission conflicts while maintaining both communication functionalities

Inventive Principle:

Principle #35Parameter changes

2Reliability

If the wireless device prioritizes WAN communication over V2X communication, then WAN transmission reliability is improved, but V2X communication data loss increases

Engineering Contradiction:

ImproveWAN transmission reliabilityVSAvoidV2X communication data

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent applies local quality by making the dropping decision context-dependent rather than applying a uniform priority rule. The determination of which transmission to drop depends on local conditions including the DFN offset value, last symbol length, and subframe number. This allows the system to prioritize WAN communication when necessary while preserving V2X data when conditions permit, resolving the contradiction through localized decision-making

Inventive Principle:

Principle #3Local quality

3Reliability

If the wireless device prioritizes V2X communication over WAN communication, then V2X transmission reliability is improved, but WAN communication data loss increases

Engineering Contradiction:

ImproveV2X transmission reliabilityVSAvoidWAN communication data

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent applies local quality by making the dropping decision context-dependent rather than applying a uniform priority rule. The determination of which transmission to drop depends on local conditions including the DFN offset value, last symbol length, and subframe number. This allows the system to prioritize V2X communication when conditions require it while minimizing WAN data loss through conditional dropping based on the calculated offset

Inventive Principle:

Principle #3Local quality

4Ease of operation

If the wireless device uses a fixed subframe timing for both WAN and V2X communication, then scheduling simplicity is maintained, but transmission conflicts occur

Engineering Contradiction:

Improvescheduling simplicityVSAvoidtransmission reliability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent applies preliminary action by calculating and determining the DFN offset value in advance before scheduling transmissions. This pre-determination of the offset based on last symbol length and subframe number allows the system to maintain relatively simple scheduling procedures while proactively avoiding transmission conflicts, thus preserving both ease of operation and transmission reliability

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS10652911B2Method for dropping communication based on priority by wireless device supporting WAN communication and V2X communication and, the wireless device performing the method

Publication Date: 2020.05.12 LG ELECTRONICS INC

AI summary

There is provided a method for transmitting data by a wireless device configured to support WAN communication and V2X communication, the method comprising scheduling a first data transmission to be performed in an N-th subframe, wherein the first transmission uses the WAN communication; scheduling a second data transmission to be performed in an (N−1)-th subframe, wherein the second transmission uses the V2X communication, wherein the (N−1)-th subframe for the second transmission is offset from the N-th subframe by a DFN (Direct Frame Number) offset; determining which one of the first transmission or the second transmission to be dropped, based on a priority between the WAN and V2X communications, wherein the determining is further based on comparison between a length of a last symbol in the (N−1)-th subframe for the second transmission with a length of the DFN offset.