Access Controller Link Grouping for Wireless Overhead Reduction
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Solution Overview
Problem
Current multiple-antenna systems face high overheads in channel information feedback, particularly in coordinated beamforming, due to the need for extensive channel sounding and reporting, which increases interference management complexity.
Innovation Solution
A data transmission method where an access controller reduces air interface overheads by determining target link groups based on historical link information and indication information, allowing for beam pairing without full channel detection, using precoding matrices to schedule data transmission within overlapping time intervals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coordinated beamforming is implemented to resolve cell-edge interference, then interference management capability is improved, but information overhead and system complexity increase due to extensive channel sounding and reporting requirements
Solution Approach 1:
The patent extracts only the essential interference assessment information needed for beam pairing decisions, rather than transmitting complete channel state information. The access point determines target link groups based on interference levels and transmits only the necessary identification and pairing information, significantly reducing feedback overhead while maintaining interference management capability
Solution Approach 2:
The patent segments the channel information transmission into two parts: the access point autonomously determines interference levels and identifies target link groups, then only transmits the condensed target link group information to the controller. This segmentation reduces the amount of information that needs to be transmitted over the air interface
2Measurement precision
If complete channel sounding is performed to obtain accurate channel information, then beamforming accuracy is improved, but transmission time and overhead increase
Solution Approach 1:
The patent applies partial action by performing channel sounding only when necessary for target link group determination, rather than continuously or completely. The access point uses historical information and current interference assessment to selectively obtain channel information only for links that may form valid beam pairs, reducing overall sounding time and overhead
Solution Approach 2:
The patent uses historical link information and interference data as preliminary assessments to pre-identify potential target link groups before performing detailed channel sounding. This preliminary filtering reduces the scope of subsequent channel measurements, thereby reducing total channel sounding time
Data Source
AI summary
Embodiments of this application disclose a data transmission method and a related apparatus. The method in the embodiments of this application includes: obtaining a set of link information and a set of indication information of at least two links, where the link information is used to indicate a sender of a radio frame transmitted on a link, a receiver of the radio frame, and a transmission time interval of the radio frame, the indication information is used to indicate whether the receiver successfully receives the radio frame transmitted on the link, and transmission time intervals of radio frames transmitted on all of the at least two links have an overlapping target time interval; and determining a target link group based on the set of link information and the set of indication information of the at least two links.