Communication Channel Setting via AP Search Mode Alternation

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Solution Overview

Problem

Existing Miracast technologies face performance degradation due to channel switching when devices connected to an access point (AP) search for or are discovered by other devices, as they typically use different channels for AP communication and device discovery, leading to inefficient channel setting.

Innovation Solution

A method that alternates between AP search mode and standby mode to minimize channel switching by scanning only some channels initially, then switching to other channels, and prioritizing the predetermined channel used for AP communication, allowing devices to maintain connection performance while setting communication channels with other devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a device connected to an AP uses a different channel for device discovery than the AP channel, then device discovery can be performed, but channel switching occurs causing performance deterioration

Engineering Contradiction:

Improvedevice discovery capabilityVSAvoidconnection performance

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent merges the AP communication channel and device discovery channel by having the device operate on the same channel for both functions. The device maintains connection to the AP and performs device discovery simultaneously on the predetermined channel, eliminating the need to switch channels and thus resolving the contradiction between discovery capability and connection performance

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent makes the predetermined channel serve multiple functions: it is used both for communicating with the AP and for device discovery operations. This multi-functionality allows the device to maintain AP connectivity while simultaneously discovering other devices, eliminating the trade-off between these two capabilities

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If a device scans all channels to discover another device, then complete channel coverage is achieved, but channel setting time increases

Engineering Contradiction:

Improvechannel coverageVSAvoidchannel setting time

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent extracts and focuses only on the necessary channel scanning operations. Instead of scanning all channels, the device performs targeted scanning on the predetermined channel where the AP and other devices are expected to operate, reducing channel setting time while maintaining effective discovery capability

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent performs preliminary channel selection by predetermined channel assignment before device discovery begins. The device and AP agree on a predetermined channel in advance, eliminating the need for time-consuming full channel scans during the discovery process

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS10278228B2Method for setting communication channel of device, method for setting communication channel between a plurality of devices, and device

Publication Date: 2019.04.30 SAMSUNG ELECTRONICS CO LTD

AI summary

A method for setting a communication channel of a first device is provided. The method for setting the communication channel of the first device includes: communicating with an Access Point (AP) via a predetermined channel; and in response to a problem arising in communicating with the AP, alternating between an AP search mode to discover the AP and a standby mode to set the communication channel for communicating with a second device among a plurality of channels.