Sidelink Resource Selection Rules for Low-Overhead Packet Scheduling

Solution Overview

Problem

The frequent exchange of sidelink control signaling between terminal devices for consistent scheduling information leads to significant resource overheads and reduced resource utilization in wireless communication systems supporting UE cooperation transmission.

Innovation Solution

A method for determining sidelink data packets that involves selecting time-frequency resources based on packet size and scheduling information, using predefined or network-configured resource selection rules to ensure consistent understanding between terminal devices, thereby reducing the need for frequent signaling and optimizing resource utilization.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If frequent sidelink control signaling is exchanged between terminal devices to ensure consistent scheduling information, then scheduling accuracy and data transmission reliability are improved, but sidelink resource overhead increases and resource utilization decreases

Engineering Contradiction:

Improvescheduling information consistencyVSAvoidsidelink resource overhead

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent applies preliminary action by having the first terminal device determine the second time-frequency resource based on pre-established rules and parameters before actual data transmission. The network device pre-configures resource selection rules, and the first terminal device pre-calculates the second time-frequency resource using packet size and first time-frequency resource information, eliminating the need for frequent post-transmission signaling exchanges to agree on scheduling parameters.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The first terminal device performs self-service by autonomously determining the second time-frequency resource based on its own packet size calculation and the pre-configured resource selection rules. Instead of requiring continuous signaling coordination with the second terminal device, the first terminal device independently calculates and selects the appropriate resource, with the second terminal device simply receiving the data on the predetermined resource.

Inventive Principle:

Principle #25Self-service

2Measurement precision

If frequent sidelink control signaling is exchanged between terminal devices to ensure consistent scheduling information, then scheduling accuracy is improved, but resource utilization is reduced

Engineering Contradiction:

Improvescheduling information accuracyVSAvoidresource utilization

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The patent applies preliminary action by having the first terminal device determine the second time-frequency resource based on pre-established rules and parameters before actual data transmission. The network device pre-configures resource selection rules, and the first terminal device pre-calculates the second time-frequency resource using packet size and first time-frequency resource information, eliminating the need for frequent post-transmission signaling exchanges to agree on scheduling parameters.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent extracts the essential scheduling information determination function from the complex iterative signaling exchange process. By removing the need for frequent back-and-forth signaling and instead using a direct calculation approach based on packet size and pre-configured rules, the patent isolates the core scheduling decision-making process and implements it efficiently without the overhead of continuous coordination signaling.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS12477523B2Sidelink data packet sending and receiving method and communication apparatus

Publication Date: 2025.11.18 HUAWEI TECH CO LTD

AI summary

A method including determining, by a first terminal device, a size of a sidelink data packet, determining, by the first terminal device based on the size of the sidelink data packet, a first quantity of time-frequency units corresponding to the sidelink data packet, determining, by the first terminal device, a frequency domain resource of a second time-frequency resource from a first time-frequency resource, based on the first quantity, a resource selection rule, and at least one of a time domain resource of the second time-frequency resource, or a frequency domain resource of the second time-frequency resource, and performing, by the first terminal device, at least one of sending the sidelink data packet to a second terminal device on the second time-frequency resource, or receiving the sidelink data packet from a second terminal device on the second time-frequency resource.