MU-MIMO Frame Grouping to Cut Channel Contention Overhead
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Solution Overview
Problem
Existing wireless communication systems using MU-MIMO technology face inefficiencies in transmitting control and data frames due to increased overhead and resource wastage in channel contention, particularly in multi-user environments.
Innovation Solution
A method is introduced to group wireless stations by including multiple receiving station information, group addresses, and group control information within frames, optimizing frame transmission by reducing unnecessary channel access and response frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional frame transmission methods are used in MU-MIMO systems, then individual station communication is maintained, but transmission efficiency decreases due to increased overhead and channel contention
Solution Approach 1:
The patent combines multiple receiving station information into a single frame by introducing group addresses and group control information. Instead of transmitting separate frames to each wireless station, the access point groups multiple stations and transmits aggregated frames containing data for multiple recipients, thereby reducing overhead and improving transmission efficiency in MU-MIMO systems
Solution Approach 2:
The patent creates frames with universal group addresses that can serve multiple receiving stations simultaneously. The group control information field enables a single frame to perform the function of multiple individual frames by addressing multiple wireless stations through shared group identifiers, reducing channel contention and resource wastage
2Reliability
If multiple response frames are transmitted for each request frame, then communication reliability is improved, but transmission overhead increases
Solution Approach 1:
The patent merges multiple response frame transmissions into a single efficient exchange by using group addresses. When multiple wireless stations receive a request frame with a group address matching their assigned group, they can coordinate their responses to reduce the number of separate response frame exchanges, thereby maintaining reliability while reducing overhead and complexity
Data Source
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AI summary
The present invention relates to a method of processing a data frame in a wireless communication system using multi-user multiple input multiple output. The method comprises: receiving, by a receiver, group control information to assign one or more groups from an access point, the group control information indicating a group sequence number (502), bitmap information (503) and stream information (504); and receiving, by the receiver, a data frame from the access point after receiving the group control information, the data frame including the group sequence number and the stream information, wherein the bitmap information (503) is used to inform whether the data frame is received from a corresponding group when the receive belongs to a plurality of groups that are expressed using the group sequence number, and wherein the stream information (504) indicates a stream location to be received by the receiver in a MU-MIMO environment and indicates a position for at least one stream of a plurality of streams that are classified into a plurality of groups.