Uplink Network MIMO Anchor Node Rate Assignment
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Solution Overview
Problem
In uplink Network MIMO communication systems, existing technologies face challenges in accurately assessing and managing communication rates due to the lack of channel state information from cooperating network nodes, which hinders effective cooperative reception and scheduling.
Innovation Solution
The method involves network nodes reporting channel state information (CSI) to an anchor node, enabling the computation of communication rates and subsequent scheduling, which can be achieved through CSI measurement, sharing, and processing across nodes, facilitating coherent or non-coherent combining and interference nulling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cooperative reception is implemented across multiple network nodes, then signal quality and data rates are improved, but the complexity of managing channel state information and rate assignment increases
Solution Approach 1:
The patent combines channel state information from multiple network nodes into a unified rate assignment decision made by the anchor node. This merging approach allows cooperative reception benefits while centralizing the complex control signaling management at the anchor node, reducing overall system complexity.
Solution Approach 2:
The anchor node serves as an intermediary that receives CSI reports from multiple network nodes and translates them into rate assignments for the UE. This intermediary role simplifies the control signaling architecture by having a single node responsible for rate management, rather than requiring direct coordination between all participating nodes.
2Measurement precision
If channel state information is collected from multiple network nodes, then rate prediction accuracy is improved, but the amount of control signaling and information processing increases
Solution Approach 1:
The patent extracts only the essential channel state information needed for rate prediction from multiple network nodes, rather than transmitting all available channel data. This selective extraction maintains rate prediction accuracy while reducing control signaling overhead by focusing on the most relevant CSI parameters.
Solution Approach 2:
Network nodes perform preliminary CSI measurements and processing before reporting to the anchor node. This preliminary action reduces the amount of raw information that needs to be transmitted, as nodes pre-process channel data into condensed CSI reports that contain only the necessary information for accurate rate prediction.
3Productivity
If rate assignment is centralized at the anchor node, then scheduling efficiency is improved, but the processing burden on the anchor node increases
Solution Approach 1:
The anchor node performs rate assignment based on partial CSI information from network nodes rather than processing complete channel state data from all nodes. This partial action approach maintains scheduling efficiency by having centralized control, while reducing the processing burden by working with condensed CSI reports rather than full channel matrices.
Data Source
AI summary
Systems and methodologies are described herein that facilitate generation and processing of control signaling to support uplink network multiple-in-multiple-out (N-MIMO) communication in a wireless communication system. As described herein, respective network nodes associated with an uplink N-MIMO framework can generate channel state information (CSI) corresponding to an uplink channel from a designated network user to the respective nodes. Generated CSI can subsequently be communicated to an uplink anchor node for the network user in order to facilitate rate assignment, scheduling, and/or other operations with respect to the network user. As described herein, CSI generated and reported by respective cells can include channel profiles, carrier/interference profiles, estimated supported uplink rates, or the like. As additionally described herein, supplemental information such as observed interference levels, demodulation indicators, or the like can be communicated to an anchor node and utilized in rate assignment and/or scheduling.