Edge Baseband Processing for Network Latency Reduction
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Solution Overview
Problem
Traditional 4G wireless network architecture with centralized core network elements leads to increased latency and inefficiency due to long backhauls, limiting network capacity and real-time feedback capabilities, especially in areas without high-capacity transport backhauls.
Innovation Solution
Implementing a decentralized architecture by locating baseband processing modules within remote access heads (RAHs) at the network edge, connected via fiber to a network controller, which reduces transport data rates and facilitates real-time feedback and interference coordination, or providing virtual network processing at the edge within eNBs or probe devices to handle traffic typically managed by core elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If core network elements (PGW, SGW, MME) are centralized in the core network, then network control and management are simplified, but latency increases and real-time feedback capability deteriorates due to long backhauls
Solution Approach 1:
The patent segments the network architecture by separating baseband processing functions from the core network and placing them in distributed remote access heads (RAHs) at the network edge. Each RAH operates semi-autonomously with local feedback loops, eliminating the need for all baseband processing to be centralized in the core network while maintaining simplified overall network control through the network controller that manages multiple RAHs.
2Productivity
If high-capacity transport backhauls are deployed to support centralized architecture, then network capacity is maximized, but deployment cost increases significantly
Solution Approach 1:
The patent implements local quality by enabling each remote access head to perform baseband processing locally and generate real-time feedback locally without requiring high-capacity backhauls to the core network. This localized processing capability allows the system to achieve high network capacity in distributed locations using standard-capacity backhauls, eliminating the need for expensive high-capacity transport infrastructure in remote areas.
3Productivity
If baseband processing is centralized in the core network, then resource utilization is optimized, but real-time feedback capability and interference coordination are compromised
Solution Approach 1:
The patent applies preliminary action by performing baseband processing and generating real-time feedback (such as RSRP and RSRQ measurements) at the remote access head before traffic is forwarded to the core network. This preliminary local processing ensures that real-time feedback is available immediately for interference coordination and resource allocation decisions, without waiting for data to traverse long backhaul links to centralized core network elements.
Data Source
AI summary
A device, provided at a network edge, receives a radio frequency signal from a user equipment, and converts the radio frequency signal into an electrical signal. The device also receives, from a network controller, at least one of control information, schedule information, or congestion management information. The device performs baseband signal processing on the electrical signal, based on at least one of the control information, the schedule information, or the congestion management information, to create a modified signal. The device provides the modified signal to the network controller.