Distributed MIMO Wireless Communication Spatial Stream Coordination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current MIMO wireless communication systems waste transmission resources due to the limitation that only one transmitter can transmit at a time, even if multiple receivers can handle spatial streams from multiple transmitters simultaneously, leading to reduced data throughput.
Innovation Solution
A MIMO wireless communication method that allows joint transmission by using distributed MIMO frames to indicate transmission opportunities and capabilities, enabling multiple transmitters to transmit concurrently as long as the sum of their spatial streams does not exceed the receiver's processing capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a contention-based protocol is adopted to allow multiple transmitters to use the same radio channel, then the adaptability of the system is improved, but the data throughput is reduced because only one transmitter can transmit at a time
Solution Approach 1:
The patent merges multiple transmission opportunities into a single coordinated transmission slot. By allowing multiple transmitters to simultaneously transmit spatial streams to multiple receivers within one transmission opportunity, the system combines what were previously separate sequential transmissions into a unified concurrent transmission framework, thereby increasing data throughput while maintaining protocol adaptability
Solution Approach 2:
The patent introduces a new dimension of spatial multiplexing by utilizing multiple spatial streams from multiple transmitters simultaneously. Instead of competing in a single transmission dimension, the system expands to multiple spatial dimensions where multiple transmitters can transmit different spatial streams concurrently to multiple receivers, effectively transforming the transmission from a one-dimensional sequential process to a multi-dimensional parallel process
2Productivity
If multiple transmitters transmit simultaneously to increase data throughput, then the productivity is improved, but the interference between transmissions increases
Solution Approach 1:
The patent implements feedback mechanisms where receivers report their reception capabilities and channel conditions to transmitters. This feedback enables transmitters to adjust their spatial stream allocations and transmission parameters dynamically, ensuring that simultaneous transmissions do not create harmful interference while maximizing data throughput through informed resource allocation
Solution Approach 2:
The patent changes transmission parameters such as spatial stream allocation, power levels, and resource block assignments based on channel conditions and receiver capabilities. By dynamically adjusting these parameters for each transmitter-receiver pair, the system enables simultaneous transmissions while controlling interference through optimized parameter selection
3Productivity
If a receiver processes spatial streams from multiple transmitters simultaneously, then the data throughput is increased, but the device complexity increases
Solution Approach 1:
The patent segments the received signal into multiple spatial streams that can be independently processed. By dividing the complex task of receiving simultaneous transmissions into separate spatial stream processing channels, the receiver can handle multiple transmitter inputs more efficiently, reducing the effective complexity of processing while maintaining high data throughput
Data Source
AI summary
The present invention discloses a MIMO wireless communication method functioning through a main wireless communication device and comprising: acquiring a transmission opportunity; issuing an distributed MIMO initiation frame including a transmission duration, a number Ns1 of transmission spatial stream(s), and a number Nr1 of reception spatial streams which an intended receiver is operable to process; receiving an initial portion which an attendant wireless communication device sends in response to the distributed MIMO initiation frame, or issuing the initial portion after reaching a time limit; and transmitting a distributed MIMO packet to the intended receiver while the attendant wireless communication device is allowed to transmit another distributed MIMO packet to the intended receiver or another intended receiver concurrently, wherein the sum of the number Ns1 and a number Ns2 of transmission spatial stream(s) of the attendant wireless communication device is equal to or less than the number Nr1.