D2D Resource Pool Segmentation for UE Detection Complexity

Solution Overview

Problem

In device-to-device (D2D) communication, the high system bandwidth leads to increased detection complexity and power consumption due to the need for blind detection across multiple physical resource blocks (PRBs), especially when the system bandwidth exceeds 10 MHz, resulting in over 50 PRBs to be scanned.

Innovation Solution

The method involves configuring user equipment with resource pool configuration information that includes frequency domain resource location information and time domain resource location information, allowing for the determination of an available frequency domain resource, thereby reducing the detection range and times by adjusting the frequency domain spacing between consecutive D2D resources, thus lowering detection complexity and power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the system bandwidth exceeds 10 MHz (corresponding to 50 PRBs), then the available frequency domain resource for D2D communication increases, but the detection complexity and power consumption at the receive end increase significantly

Engineering Contradiction:

Improveavailable frequency domain resourceVSAvoiddetection complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent divides the SA resource pool into multiple sub-pools, each corresponding to a specific frequency domain range. The receive end only needs to perform blind detection in the sub-pool assigned to it, rather than searching the entire resource pool. This segmentation reduces the detection complexity from O(N) to O(N/K) where K is the number of sub-pools, while the system can still utilize the full bandwidth by distributing different sub-pools to different user equipment.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent assigns different frequency domain ranges to different user equipment for SA transmission. Each receive end is configured with specific frequency domain location information that indicates which sub-pool to monitor. This local quality approach ensures that each device only processes signals in its assigned frequency range, reducing power consumption and detection complexity while maintaining overall system capacity.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If the system bandwidth exceeds 10 MHz (corresponding to 50 PRBs), then the available frequency domain resource for D2D communication increases, but the power consumption at the receive end increases due to extensive blind detection

Engineering Contradiction:

Improveavailable frequency domain resourceVSAvoidpower consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The patent divides the SA resource pool into multiple sub-pools, each corresponding to a specific frequency domain range. The receive end only needs to perform blind detection in the sub-pool assigned to it, rather than searching the entire resource pool. This segmentation reduces the detection complexity from O(N) to O(N/K) where K is the number of sub-pools, while the system can still utilize the full bandwidth by distributing different sub-pools to different user equipment.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent assigns different frequency domain ranges to different user equipment for SA transmission. Each receive end is configured with specific frequency domain location information that indicates which sub-pool to monitor. This local quality approach ensures that each device only processes signals in its assigned frequency range, reducing power consumption and detection complexity while maintaining overall system capacity.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS11470608B2D2D communication method and device

Publication Date: 2022.10.11 HUAWEI TECH CO LTD

AI summary

A device to device (D2D) communication method includes: receiving, by user equipment (UE), resource pool configuration information, where the resource pool configuration information includes frequency domain resource location information and time domain resource location information and the frequency domain resource location information includes a frequency domain resource pool indicator and a frequency domain spacing between two consecutive device to device D2D resources; determining, by the UE, an available frequency domain resource based on the resource pool configuration information; and performing, by the UE, D2D communication on the available frequency domain resource.