Uplink Transmission Cooperation Mode for Vehicular Penetration Loss

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Solution Overview

Problem

Vehicular penetration loss (VPL) significantly attenuates radio signals in wireless communication systems, particularly for vehicle user equipment (VUE) devices, leading to degraded uplink transmission performance due to power limitations when VUEs are far from the base station, especially in high VPL scenarios like high-speed trains.

Innovation Solution

Implementing a cooperation mode using Device-to-Device (D2D) communication among VUEs to exchange and steer data towards the base station, improving the signal-to-noise ratio and energy efficiency by allowing multiple VUEs to cooperate in transmitting data, thereby reducing the energy spent on communication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If VUE transmits data using traditional uplink mode, then transmission can be performed, but transmission performance is significantly degraded due to vehicular penetration loss and power limitations

Engineering Contradiction:

Improveuplink transmission performanceVSAvoidvehicular penetration loss

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces a base station as an intermediary to receive data from multiple VUEs. Instead of each VUE directly transmitting to the base station over the attenuated uplink channel, VUEs transmit to nearby peer VUEs which then forward to the base station, effectively using intermediate relay nodes to overcome the harmful penetration loss

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent combines multiple VUE transmissions into a single cooperative transmission unit. Multiple VUEs merge their data and transmit cooperatively through selected relay nodes, transforming individual weak transmissions into a stronger combined transmission that overcomes the penetration loss effect

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If VUE increases transmission power to overcome attenuation, then signal strength can be maintained, but energy consumption increases significantly

Engineering Contradiction:

Improvesignal strengthVSAvoidtransmission energy

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent segments the transmission task across multiple VUEs instead of requiring one VUE to transmit with high power. Each VUE transmits at lower power to nearby relays, and the segmentation of transmission responsibilities reduces individual energy consumption while maintaining overall signal strength

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent uses intermediate VUEs as mediators to receive and forward data, eliminating the need for source VUEs to transmit at high power directly to the base station. The intermediary nodes perform the energy-intensive transmission task instead

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If cooperation mode is used among VUEs, then energy efficiency and data rate improve, but transmission delays are introduced

Engineering Contradiction:

Improvedata rateVSAvoidtransmission delay

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent performs preliminary actions by pre-selecting relay VUEs and establishing cooperation relationships before data transmission. This advance preparation reduces the time required during actual data transmission, minimizing the delay penalty of cooperative mode

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements dynamic relay selection and cooperation mode activation based on channel conditions and data characteristics. The system dynamically adjusts which VUEs cooperate and when to use cooperation mode, optimizing the balance between data rate improvement and delay introduction

Inventive Principle:

Principle #15Dynamics

4Reliability

If all data types are transmitted using cooperation mode, then uplink performance improves, but complexity of data management increases

Engineering Contradiction:

Improveuplink performanceVSAvoiddata management complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies different transmission modes to different data types based on their specific requirements. Rather than uniformly applying cooperation mode to all data, the system selectively applies it to data types that benefit most, reducing management complexity while maintaining performance improvements for critical data

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent implements partial cooperation mode activation, applying cooperation only to specific data types or specific transmission conditions rather than all data. This partial action approach reduces the complexity overhead while still achieving performance improvements for the most beneficial cases

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS10237906B2Method and apparatus for improving uplink transmission in a wireless communication system

Publication Date: 2019.03.19 ASUSTEK COMPUTER INC

AI summary

Methods and apparatuses for improving uplink transmissions in a wireless communication system are disclosed herein. In one method, a user equipment receives an indication indicating a type of data that can be transmitted using a cooperation mode. A first data is transmitted using the cooperation mode, in which the first data belongs to the type of data using the cooperation mode based on the indication. A second data is transmitted without using the cooperation mode, in which the second data does not belong to the type of data using the cooperation mode based on the indication. The cooperation mode is enabled when transmitting the first and second data.