Relay Node Local IP Service via Wireless Backhaul
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Solution Overview
Problem
Wireless communication systems face challenges in providing high-quality local IP services due to the need for wired backhaul connections and interference issues with Macro cells, limiting the deployment and application of Femto eNBs.
Innovation Solution
Implementing a method and system that uses a relay node to establish a Packet Data Network connection between User Equipment and a local gateway, enabling local IP service data transmission through the relay node, which can be embedded, collocated, or connected via a wired connection, and includes caching capabilities to manage network load and reduce backhaul resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If H(e)NB is deployed to provide local IP services, then service quality is improved, but wired backhaul requirement and interference with Macro cell worsen deployment flexibility
Solution Approach 1:
The patent introduces a relay node as an intermediary between the Macro eNB and UE. The relay node establishes a wireless backhaul connection to the Macro eNB and provides local IP services to UEs, eliminating the need for wired backhaul at the H(e)NB while maintaining service quality. The relay node acts as a mediator that resolves the contradiction between service quality and deployment flexibility.
2Adaptability or versatility
If H(e)NB is used for local IP service, then local service support is improved, but wired backhaul requirement limits mobility and deployment scenarios
Solution Approach 1:
The patent replaces the mechanical/wired backhaul connection required by H(e)NB with a wireless backhaul connection through the relay node. The relay node communicates wirelessly with the Macro eNB via electromagnetic waves, eliminating the physical cable constraint and enabling mobility while maintaining local IP service support.
3Reliability
If H(e)NB deploys local IP service, then local service capability is improved, but interference with adjacent Macro cell increases
Solution Approach 1:
The patent extracts the local IP service functionality from the H(e)NB architecture and relocates it to the relay node. The relay node, being part of the Macro eNB's wireless network, provides local services without generating the same level of interference as H(e)NB would, as it operates under the Macro eNB's coordination and resource management.
4Adaptability or versatility
If relay node is used instead of H(e)NB, then deployment flexibility is improved, but need for local gateway and caching mechanism increases system complexity
Solution Approach 1:
The patent merges the local gateway functionality with the relay node. The relay node incorporates a local gateway and caching mechanism internally, combining multiple functions (relaying, local IP service provision, and caching) into a single integrated entity. This reduces the number of separate components needed while maintaining deployment flexibility.
Data Source
AI summary
The present disclosure provides a method and system for implementing a local IP service through a relay node, through which a PDN connection between a local UE and a local gateway is established, and local IP service data are transmitted through the relay node between the UE and the local gateway. In the present disclosure, a local gateway is embedded into a relay node, or the local gateway is collocated with the relay node, or the local gateway is connected to the relay node via a wired connection, and a PDN connection between a local UE and the local gateway is established through the relay node. The present disclosure can support not only a local service or a proximity-based service between a relay node and a UE but also a local service or a proximity-based service between two or more UEs through a relay node, thus supporting extensive applications based on local IP data streams and reducing the load of a core network. In addition, spectral efficiency and throughput can also be improved by using a short distance wireless channel.