Server-Mediated CSI Acquisition for Wireless AP Scanning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for terminals to obtain Channel State Information (CSI) are limited by a restricted scanning range, resulting in a limited number of measurement Access Points (APs) that can provide CSI, which affects service precision.
Innovation Solution
A method where a server determines multiple measurement APs within the coverage area of a terminal, sends CSI measurement requests to these APs, and processes the obtained CSI data to improve precision, including the use of multicast requests to gather more CSI when initial precision thresholds are not met.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a terminal scans only APs that can provide CSI measurement service to determine measurement APs, then the terminal can obtain CSI, but the quantity of measurement APs is limited due to limited scanning range, resulting in limited amount of obtained CSI and affected service precision
Solution Approach 1:
The patent introduces a server as an intermediary between the terminal and multiple APs. The server collects CSI measurement capabilities from multiple APs in its coverage area, processes this information, and provides the terminal with a list of suitable measurement APs. This intermediary approach allows the terminal to access a broader set of measurement APs without being limited by its own scanning range, thereby increasing the quantity of measurement APs while improving service precision through more comprehensive CSI data collection
2Ease of operation
If a terminal performs local scanning to determine measurement APs, then the terminal can obtain CSI independently, but the scanning range is limited, resulting in limited quantity of APs and affected precision
Solution Approach 1:
The patent maintains the terminal's ability to independently obtain CSI by allowing it to send measurement requests and receive results directly. However, the terminal now works in conjunction with a server that pre-processes AP capability information. The terminal still performs the actual CSI measurement operations independently, but leverages the server's comprehensive AP database to select the best measurement APs, thus preserving ease of operation while improving measurement precision
3Quantity of substance
If the server determines measurement APs based on terminal's connected AP, then the server can expand the scanning range, but requires additional communication overhead between server and APs
Solution Approach 1:
The patent implements preliminary action by having the server proactively collect and store CSI measurement capability information from multiple APs in advance, before any terminal needs to perform measurements. The server maintains an updated database of AP capabilities and automatically determines suitable measurement APs based on the terminal's connected AP. This pre-processing approach expands the accessible AP quantity while minimizing communication overhead during actual measurement operations, as the server can quickly query its existing database rather than continuously communicating with all APs
Data Source
AI summary
A method includes determining at least one first measurement AP in first storage APs according to the address of the first AP, sending a second CSI measurement request to the at least one first measurement AP, where the second CSI measurement request includes the address of the terminal, receiving first measurement data, where the first measurement data includes first CSI, the first CSI is obtained after a target measurement AP performs channel estimation on the first service data, and sending the first measurement data or a first processing result to the terminal, where the first processing result is obtained by using the first measurement data.