Joint Transmission MCS Selection for Wireless Devices
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Solution Overview
Problem
In wireless communication systems, the performance of data reception does not improve proportionally with the number of access points (APs), and the data transmission rate is limited by the modulation and coding scheme (MCS) determined based on a single AP, even with joint transmission.
Innovation Solution
An electronic device capable of selecting an MCS adaptively based on the signal strength of multiple APs for improved data communication through joint transmission, determining candidate APs and synchronizing data transmission to enhance reception performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data transmission is performed based on MCS determined with reference to signal strength from a certain AP among multiple APs, then the system maintains compatibility with existing single-AP MCS selection, but the data transmission rate cannot be improved despite increased reception signal strength from joint transmission
Solution Approach 1:
The patent implements dynamic MCS selection by continuously monitoring signal strengths from multiple APs and adjusting the MCS index accordingly. Instead of using a fixed MCS based on a single AP, the system dynamically determines the appropriate MCS level by evaluating the combined signal quality from all participating APs in the joint transmission, allowing the data transmission rate to adapt to the actual reception conditions.
Solution Approach 2:
The patent changes the parameter basis for MCS selection from single-AP signal strength to multi-AP combined signal strength. By aggregating and evaluating signal quality metrics from multiple APs, the system selects an MCS index that reflects the improved reception conditions enabled by joint transmission, thereby increasing the data transmission rate while maintaining reliable communication.
2Area of stationary object
If an increased number of APs are used to extend coverage area, then the coverage range is improved, but the data reception performance does not improve in proportion to the number of APs
Solution Approach 1:
The patent merges the transmission capabilities of multiple APs into a coordinated joint transmission system. By combining the signal contributions from multiple APs that cover different areas, the system achieves both extended coverage and improved reception performance. The merging of multiple signal sources allows the electronic device to receive data with higher quality than what would be available from any single AP alone.
Solution Approach 2:
The patent enables the multi-AP system to serve multiple functions simultaneously: extending coverage area while also improving data reception performance. The same set of APs that provide broad geographic coverage are also utilized for enhanced signal quality through joint transmission, making the system universally effective for both coverage extension and performance improvement without requiring separate infrastructure.
3Reliability
If joint transmission is implemented using multiple APs, then reception signal quality is improved, but the data transmission rate remains limited by single-AP MCS determination
Solution Approach 1:
The patent implements a feedback mechanism where the electronic device measures the combined signal strength from multiple APs and feeds this information back to determine the appropriate MCS index. The system continuously monitors the reception quality from the joint transmission and adjusts the MCS selection based on the aggregated signal quality metrics, ensuring that the data transmission rate is optimized according to the actual multi-AP reception conditions rather than being limited by single-AP MCS determination.
Data Source
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AI summary
A control method of an electronic device for performing joint transmission is provided. The control method includes searching for access points (APs) to retrieve a plurality of APs, determining a modulation and coding scheme (MCS) for data transmission based on a signal strength of at least two APs among the plurality of APs, determining the at least two APs as candidate APs for joint transmission by comparing a joint transmission gain time according to the determined MCS and a synchronization time for the at least two APs to perform joint transmission, transmitting information about the candidate APs to an AP control device, and performing data communication with joint APs, which are determined to perform joint transmission by the AP control device, among the candidate APs.