Proxy Node Data Forwarding for Wireless Backhaul Latency Reduction
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Solution Overview
Problem
Current data forwarding methods during handover in wireless communication networks involve unnecessary transmission over the wireless backhaul link, leading to increased delay and resource occupation, which affects the performance of both the wireless device being handed over and other devices.
Innovation Solution
A proxy node is introduced to receive data from the core network, detect mobility events, buffer data, and forward it directly to the target network node upon indication, thereby avoiding unnecessary transmission back to the serving network node.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is forwarded through the serving network node during handover, then data delivery is ensured, but delay increases and backhaul link resources are occupied unnecessarily
Solution Approach 1:
The patent extracts the data forwarding function from the serving network node and implements it directly at the proxy node. When handover is detected, the proxy node forwards data directly to the target network node without routing it through the serving network node, thereby eliminating unnecessary transmissions and reducing backhaul link occupation while ensuring reliable data delivery.
Solution Approach 2:
The proxy node acts as an intermediary between the core network and network nodes. It receives data from the core network, detects handover events, and directly forwards data to the target network node, mediating the data flow to avoid the inefficient path through the serving node and reducing handover delay.
2Productivity
If data is transmitted over wireless backhaul link during handover, then data forwarding is achieved, but resource occupation increases
Solution Approach 1:
The patent removes the unnecessary transmission hop through the serving network node by implementing direct forwarding at the proxy node. This extraction of the redundant path reduces the quantity of data transmissions over the wireless backhaul link while maintaining effective data forwarding to the target network node.
3Reliability
If conventional handover data forwarding is used, then data is delivered to target node, but performance of other wireless devices deteriorates
Solution Approach 1:
By extracting the data forwarding operation from the serving network node and implementing it at the proxy node, the patent eliminates unnecessary wireless backhaul transmissions that would otherwise occupy resources needed by other wireless devices, thereby maintaining handover completion while preserving overall network performance.
Data Source
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AI summary
Small base station, micro, femto or pico BTS (PBS) are connected via Un interface to a donor eNB DeNB. In case of a handover from that PBS packets that had not been acknowledged by a UE need to be forwarded to the target base station. Forwarding them via Un and DeNB to the target eNB causes latency and wast radio resources on Un. Thus, the DeNB uses information about the handover to buffer packets and, after being informed by PBS, forward those packets that had not been acknowledged by the UE. This procedure, therefore, saves resources on Un interface and reduces latency. No forwarding of those packets from PBS to DeNB is required. There is provided a method for forwarding data to a wireless terminal. The method is performed by a proxy node. The method comprises receiving data on a link between a core network and a backhaul hub node. The data is addressed to a wireless terminal served by, or handed over from, a serving network node. The method comprises receiving a first indication to forward the data to a target network node of the wireless terminal. The method comprises forwarding the data towards the target network node in response thereto. There is also provided a computer program for such a method and a proxy node configured to perform such a method.