Hybrid Bandwidth MUMIMO Spatial Multiplexing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current WiFi standards, such as WiFi 6 and WiFi 7, do not support spatially multiplexing of STAs with different signal bandwidths and overlapping bands, nor do they allow for different numbers of user streams, interference streams, or modulation coding schemes within the intended signal bandwidth of a given user.
Innovation Solution
The proposed solution is a hybrid BW MUMIMO approach that enables spatial multiplexing of STAs with different signal bandwidths and supports different numbers of user streams, interference streams, and modulation coding schemes within sub-bands of the intended signal bandwidth. This is achieved through the use of new fields in the Physical Layer Convergence Protocol (PLCP) Protocol Data Unit (PPDU), including a new common info field and multiple user info fields, to transmit information associated with the transmission of signals to different end devices using different sized bandwidths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pure bandwidth MUMIMO or OFDMA-MUMIMO is used where all users have the same bandwidth, then system compatibility with existing WiFi standards is maintained, but bandwidth utilization efficiency and system throughput are limited
Solution Approach 1:
The patent divides the total bandwidth into multiple sub-bands, allowing different users to be allocated different subsets of these sub-bands. This segmentation enables flexible bandwidth allocation where each user can receive signals on a customized bandwidth configuration, resolving the contradiction between maintaining system compatibility and achieving bandwidth utilization efficiency.
2Productivity
If the same number of streams is used across all bandwidth for a given user, then signal transmission simplicity is maintained, but transmission efficiency and adaptability to different user requirements are reduced
Solution Approach 1:
The patent applies local quality by allowing different numbers of spatial streams to be configured for different sub-bands within the total bandwidth. Each sub-band can be optimized independently with appropriate stream configurations based on user requirements and channel conditions, thereby improving transmission efficiency while managing complexity through structured sub-band organization.
3Adaptability or versatility
If different segments of bandwidth have different numbers of streams in MIMO-OFDMA, then bandwidth resource allocation flexibility is improved, but the number of streams across bandwidth for every user must remain the same which limits optimization
Solution Approach 1:
The patent segments both the bandwidth into sub-bands and the stream allocation per sub-band, enabling independent optimization of stream configurations for each user-sub-band combination. This resolves the limitation where stream numbers must be uniform across bandwidth by allowing stream allocation to vary both across sub-bands and across users, thereby improving stream utilization efficiency while maintaining bandwidth allocation flexibility.
Data Source
AI summary
Embodiments of a wireless device and method are disclosed. In an embodiment, a wireless device comprises a wireless transceiver arranged to receive and transmit signals, and a controller operably coupled to the wireless transceiver to process the signals, wherein the controller is configured to transmit the signals to different end devices using different sized bandwidths, wherein the signals transmitted to a first end device use a first bandwidth of a first size and the signals transmitted to a first end device use a second bandwidth of a second size.