Distributed Precoding and Linear Detection for Lower MIMO Node Traffic
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Solution Overview
Problem
Distributed MIMO systems face significant processing load and complexity at the network node, with high traffic requirements and limited physical layer security due to centralized processing of received or transmitted signals.
Innovation Solution
In-network processing is implemented at antenna nodes, where linear detection and precoding are performed iteratively, reducing processing load at the network node and minimizing traffic between nodes, while enhancing physical layer security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If centralized processing is used at the network node, then processing capability is concentrated, but processing load and traffic requirements increase significantly
Solution Approach 1:
The patent segments the centralized processing function into distributed processing units located at multiple antenna nodes. Each antenna node performs local signal processing operations, dividing the overall processing load across multiple independent units rather than concentrating it at a single network node. This segmentation reduces the processing burden on any single node while maintaining overall system capability.
2Ease of operation
If centralized processing is used at the network node, then system control is simplified, but traffic requirements between nodes increase
Solution Approach 1:
The patent extracts signal processing functions from the centralized network node and relocates them to distributed antenna nodes. By taking out processing operations from the central location and placing them at the edge nodes, the system reduces the volume of traffic that must be transmitted between the network node and antenna nodes, while maintaining centralized coordination for overall system control.
3Reliability
If centralized processing is used, then security management is centralized, but physical layer security is limited
Solution Approach 1:
The patent implements local signal processing at each antenna node, enabling each node to independently perform security-critical operations on received or transmitted signals. This local quality approach allows each node to provide physical layer security for its local communications while maintaining centralized security management policies, thereby enhancing overall physical layer security beyond what centralized processing alone can achieve.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first node may transmit a set of first values indicating a first estimated value at the first node and a first reliability value associated with the first estimated value, the set of first values being based at least in part on channel state information (CSI) associated with the first node and a set of user equipments (UEs). The first node may receive, from a set of second nodes, a set of second values indicating a second estimated value at the second node and a second reliability value associated with the second estimated value. The first node may transmit, to the set of second nodes, a set of third values indicating a third estimated value at the first node and a third reliability value associated with the third estimated value. Numerous other aspects are described.