ProSe Destination Selection via SL Grant Priority in D2D Systems

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Solution Overview

Problem

Current D2D communication systems lack an efficient method for selecting and managing multiple ProSe destinations and SL grants, which limits the ability to transmit data effectively between multiple devices in a single communication period.

Innovation Solution

A method and apparatus for User Equipment (UE) to select multiple SL grants and ProSe destinations based on priority, allowing SL data to be transmitted to one ProSe destination using only one SL grant, optimizing data transmission by prioritizing and managing available resources.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple SL grants are allocated for data transmission in D2D communication, then the data transmission capacity increases, but the complexity of selecting and managing multiple ProSe destinations and SL grants increases

Engineering Contradiction:
Improvedata transmission capacityVSAvoidcomplexity of selecting and managing SL grants and destinations
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The patent applies parameter changes by introducing priority values as a new parameter for both SL grants and ProSe destinations. The UE changes the state of resource allocation by selecting grants and destinations based on their priority parameters, where higher priority items are selected first. This resolves the contradiction by providing a systematic method to manage multiple grants and destinations without increasing operational complexity, as the priority parameter automatically guides the selection process.

Inventive Principle:
Principle #35Parameter changes

2Productivity

If SL data is transmitted to multiple ProSe destinations using multiple SL grants, then the throughput of the communication system increases, but the resource management complexity increases

Engineering Contradiction:
ImprovethroughputVSAvoidresource management complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The patent introduces priority parameters for both SL grants and ProSe destinations, enabling the UE to systematically manage multiple resources. The UE selects SL grants and destinations based on comparing their priority values, ensuring that higher priority communications receive resources first. This parameter-based approach allows the system to achieve high throughput through multiple simultaneous transmissions while maintaining manageable resource allocation complexity.

Inventive Principle:
Principle #35Parameter changes

3Productivity

If the UE selects multiple ProSe destinations and SL grants within a single communication period, then the efficiency of data transmission is improved, but the difficulty of detecting and measuring the optimal combination increases

Engineering Contradiction:
Improveefficiency of data transmissionVSAvoiddifficulty of detecting optimal combination
Core Design Contradiction:
ProductivityVSDifficulty of detecting and measuring

Solution Approach 1:

The patent resolves the detection difficulty by introducing priority parameters that quantify the quality of each SL grant and ProSe destination. Instead of searching for optimal combinations through complex measurements, the UE simply compares priority values and selects the highest priority items. This transforms a difficult optimization problem into a straightforward parameter comparison task, maintaining high transmission efficiency while reducing detection complexity.

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentUS10667286B2Method for selecting prose destinations or SL grants in a D2D communication system and device therefor
Publication Date: 2020.05.26 LG ELECTRONICS INC
  • US10667286B2 patent drawing
  • US10667286B2 patent drawing
  • US10667286B2 patent drawing

AI summary

The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for selecting prose destinations or SL grants in a D2D communication system, the method comprising: receiving or selecting N numbers of SL grants used for a next SC period; selecting ProSe destinations in decreasing order of priority of ProSe destination so that selected numbers of ProSe destinations are equal to N, wherein a priority of ProSe destination is set to priority of a SL logical channel with a highest priority among all SL logical channels associated with the ProSe destination; and transmitting SL data of the selected ProSe destinations using the N numbers of SL grants in the next SC period, wherein SL data of each of the selected ProSe destinations is transmitted using a corresponding SL grant among the N numbers of SL grants.