V2X Scheduling Assignment Resource Allocation

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Solution Overview

Problem

Conventional scheduling approaches for device-to-device (D2D) communications in V2X systems incur high overhead and latency due to the need for dedicated resources and explicit scheduling assignment packets, which is inefficient for high peak user capacity and low-latency requirements in vehicle-to-everything (V2X) communications.

Innovation Solution

The method involves transmitting a scheduling assignment message on a shared medium during a predefined period to indicate resources in periodically occurring resource pools, allowing data messages to be transmitted in identified resources, with the option to specify retransmissions and select pools based on message characteristics such as latency and throughput requirements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If dedicated resources and explicit scheduling assignment packets are used for D2D communications, then reliability is improved, but overhead increases and system capacity decreases

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidsystem capacity

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent combines scheduling assignment information with data transmission by allowing UEs to decode data packets directly from the physical downlink shared channel (PDSCH) without separate scheduling assignment packets. The network node embeds scheduling information within the data transmission itself, merging control and data channels to reduce overhead while maintaining reliable communication.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent extracts the scheduling assignment function from dedicated control resources and integrates it into the data transmission process. By removing the separate scheduling assignment packet requirement and embedding scheduling information directly in the data packets, the system reduces resource overhead while preserving the scheduling function's reliability.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If dedicated resources and explicit scheduling assignment packets are used for D2D communications, then reliability is improved, but latency increases

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidtransmission latency

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent implements preliminary action by pre-configuring UEs with resource pool information and transmission parameters before actual data transmission. The network node provides UE identities, resource pool configurations, and modulation schemes in advance, allowing UEs to directly decode data packets without waiting for separate scheduling assignment packets, thereby reducing latency while maintaining reliability.

Inventive Principle:

Principle #10Preliminary action

3Quantity of substance

If contention-based resources are used for D2D communications, then overhead is reduced and system capacity improves, but reliability decreases

Engineering Contradiction:

Improvesystem capacityVSAvoidcommunication reliability

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The patent implements feedback mechanisms where the network node monitors D2D communication quality and dynamically adjusts resource pool configurations, power levels, and modulation schemes. This feedback loop ensures that contention-based resource sharing maintains high system capacity while reliability is preserved through adaptive network control and error correction.

Inventive Principle:

Principle #23Feedback

4Ease of operation

If conventional scheduling approaches are used for V2X communications, then resource allocation is controlled, but overhead increases and peak user capacity is limited

Engineering Contradiction:

Improveresource allocation controlVSAvoidpeak user capacity

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The patent applies dynamics by enabling flexible, adaptive resource allocation where UEs can dynamically select from multiple configured resource pools based on current channel conditions and traffic requirements. The network node dynamically updates resource pool configurations and UE parameters, allowing the system to adapt to varying V2X traffic patterns and achieve high peak user capacity while maintaining operational control.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS10743336B2Scheduling and transmitting control information and data for direct communication

Publication Date: 2020.08.11 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

A method of indicating resources in periodically occurring resource pools according to some embodiments includes, in a radio communication device, transmitting a scheduling assignment message on a shared medium during a predefined period that is defined for the transmission of scheduling assignment messages, wherein the scheduling assignment message indicates resources in a plurality of the periodically occurring resource pools for transmission of a data message; and transmitting the data message in the identified resources in the plurality of the periodically occurring resource pools. Related radio communication devices are also disclosed.