Coordination Node Election in CoMP Sets
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Solution Overview
Problem
Conventional CoMP architectures face challenges with high latency and overhead, which negatively impact network throughput due to the need for Channel State Information (CSI) reporting, leading to inefficient radio resource management and interference management in cellular networks.
Innovation Solution
A coordination node is elected within a CoMP set to receive CSI feedback from UEs, reducing the need for node-to-node or backhaul signaling, thereby decreasing latency and signaling load, and allowing for more efficient radio resource allocation and management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CSI feedback is reported to multiple basestations in distributed CoMP architecture, then interference management capability is improved, but signaling overhead and latency increase
Solution Approach 1:
The patent extracts the CSI feedback reception function from multiple basestations and concentrates it in a single coordination node. This eliminates the need for each basestation to independently receive and process CSI feedback, thereby reducing signaling overhead and network latency while maintaining the coordinated interference management capability through the centralized coordination node.
Solution Approach 2:
The coordination node acts as an intermediary between UEs and multiple basestations. It receives CSI feedback from UEs, performs coordination functions, and manages interference across the CoMP set. This intermediary role consolidates signaling paths and reduces the complexity of direct multi-point CSI reporting.
2Productivity
If centralized CoMP architecture is used with CU performing scheduling decisions, then scheduling coordination is improved, but infrastructure overhead and signaling complexity increase
Solution Approach 1:
The coordination node performs multiple functions including CSI feedback reception, scheduling decisions, and interference coordination within a single entity. This multi-functional approach eliminates the need for separate centralized units and reduces infrastructure overhead while maintaining efficient scheduling coordination across the CoMP set.
3Measurement precision
If all basestations receive CSI feedback independently, then scheduling accuracy is improved, but radio resource consumption for feedback increases
Solution Approach 1:
The patent merges the CSI feedback reception function into a single coordination node, consolidating multiple feedback streams into one. This reduces radio resource consumption for feedback transmission while the coordination node maintains scheduling accuracy by processing consolidated CSI information for coordinated scheduling decisions across all basestations.
Data Source
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AI summary
A method and apparatus for electing a coordination node in a Coordinated Multipoint (Co MP) set of cooperating nodes for receiving channel information from a plurality of wireless devices operating in a wireless network. In one aspect, a method is provided for a node which includes determining a channel quality parameter for the node indicative of a channel quality between the node and the plurality of wireless devices, receiving a first message from a first neighbor node in the CoMP set, the first message including a channel quality parameter for another node (e.g. the first neighbor node) in the CoMP set indicative of a channel quality between the other node and the plurality of wireless devices, and send a second message to the first neighbor node in the CoMP set, the second message identifying the coordination node elected by the node based on the channel quality parameters for the node and the other node.