Dynamic Channel Allocation for MIMO Directional Transmission
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Solution Overview
Problem
The IEEE 802.11ad standard is limited to single data stream transmission on a single channel and does not support multi-channel transmission and multiple-input multiple-output (MIMO) operations, restricting its ability to dynamically allocate channels and data streams for enhanced data transfer capabilities.
Innovation Solution
The implementation of enhanced poll and request procedures that include MIMO and multi-channel control fields in frames, allowing for dynamic allocation of channels and data streams, enabling MIMO and multi-channel transmission while maintaining backward compatibility with legacy systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the IEEE 802.11ad standard is used for directional multi-gigabit transmission, then data transfer speed is improved, but the system is limited to single data stream transmission on a single channel
Solution Approach 1:
The patent implements dynamic allocation of channels and data streams through poll frames and service period requests, allowing the system to adaptively switch between single-channel and multi-channel modes, and between single-stream and MIMO transmission based on real-time conditions
Solution Approach 2:
The enhanced frame structures include universal control fields that can indicate different transmission modes (single-channel, multi-channel, MIMO, MU-MIMO), making the system capable of performing multiple functions through a unified protocol framework
2Productivity
If MIMO and multi-channel transmission are implemented, then data transfer capability is enhanced, but frame structure complexity increases
Solution Approach 1:
The patent segments the control information into separate fields within frames: MIMO control fields indicate MIMO parameters, while multi-channel control fields indicate channel allocation. This segmentation allows complex information to be organized into manageable, standardized components
Solution Approach 2:
The patent introduces poll frames and service period request frames as intermediary structures that carry control fields indicating MIMO and multi-channel configurations. These intermediary frames mediate between the access point and stations, enabling complex transmission modes through standardized signaling mechanisms
3Adaptability or versatility
If dynamic allocation of channels and data streams is implemented, then system adaptability is improved, but control overhead increases
Solution Approach 1:
The patent merges multiple control functions into unified frame structures. The poll frame combines channel allocation information with MIMO configuration indicators, and the service period request frame combines data stream requests with transmission mode indications, reducing the number of separate control messages needed
Data Source
AI summary
Methods and apparatus are described herein for dynamic allocation of multiple channels and data streams for multi-channel transmission and multiple-input and multiple-output (MIMO). For example, a station (STA) may receive an enhanced poll (EPoll) frame that includes a time offset, a channel offset and antenna/sector settings from an access point (AP). The STA may transmit, based on the received EPoll frame, an enhanced service period request (ESPR) frame that includes a MIMO control field and a multi-channel control field. The MIMO control field may indicate whether the STA supports MIMO transmission. The multi-channel control field may indicate whether the STA supports multi-channel transmission. Upon transmitting the ESPR frame, the STA may receive an enhanced grant frame from the AP. The enhanced grant frame may include an antenna configuration and a multi-channel allocation to enable the STA to perform the MIMO transmission and the multi-channel transmission.