Reserved Time Interval Signal Transmission in Wireless D2D Systems

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Solution Overview

Problem

Current wireless communication systems face challenges in supporting concurrent Device-to-Device (D2D) communication in infrastructure environments, particularly in efficiently managing medium access to prevent interference and optimize frequency resource use.

Innovation Solution

A method and device for wireless communication systems that allow a first node to establish reserved transmission connections, enabling simultaneous signal transmission to a reception node while allowing other non-neighbor nodes to transmit within reserved time intervals, using a transceiver and processor to manage connection establishment and neighbor node information.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If nodes perform concurrent transmission in wireless communication systems, then frequency resource utilization is improved, but interference between transmissions increases

Engineering Contradiction:

Improvefrequency resource utilizationVSAvoidinterference

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent segments the wireless communication space by identifying and excluding neighbor nodes from concurrent transmission. Nodes are divided into neighbor nodes (within carrier sensing region) and non-neighbor nodes (outside carrier sensing region), allowing concurrent transmission only among non-neighbor nodes to avoid interference while improving frequency resource utilization

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by creating different transmission rules for different spatial regions. Within the carrier sensing region (neighbor nodes), transmission is restricted to avoid interference. Outside the carrier sensing region (non-neighbor nodes), concurrent transmission is permitted, optimizing resource utilization in interference-free zones

Inventive Principle:

Principle #3Local quality

2Reliability

If reserved time intervals are allocated for connection establishment, then transmission reliability is improved, but access delay for other nodes increases

Engineering Contradiction:

Improvetransmission reliabilityVSAvoidaccess delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent makes the medium access control dynamic by allowing nodes to switch between reserved access (for reliability) and contention-based access (for speed). Non-neighbor nodes can perform contention-based access during reserved time intervals, reducing access delay while maintaining transmission reliability for established connections

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent applies partial action by allowing only non-neighbor nodes to perform contention-based access during reserved time intervals, while neighbor nodes continue to use reserved access. This partial relaxation of reservation constraints reduces overall access delay without compromising the reliability of established connections

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS9642170B2Method for transmitting and receiving a signal in a reserved time interval with CSMA/CA scheme in a wireless communication system

Publication Date: 2017.05.02 LG ELECTRONICS INC

AI summary

One embodiment of the present invention relates to a method for transmitting a signal by a first node in a wireless communication system, including the steps of a first node setting a connection for a reserved transmission and transmitting a signal to a first reception node in the time interval reserved as the connection setting, wherein, in the time interval, a signal transmission is allowed by a second node which is not included in the neighbor nodes of the first reception node.