Relay Node Data Stream Aggregation for LTE-A Throughput
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Solution Overview
Problem
In LTE-A wireless communication systems, relay nodes (RN) face challenges in ensuring continued operation during high-speed movements and effective resource utilization, particularly in scenarios with network congestion or limited coverage, due to serial transmission and inadequate coordination between RN and donor eNodeB.
Innovation Solution
Implementing a data stream aggregation technology that allows the RN to support data stream aggregation, sharing the load of data transmission with the donor eNodeB, and dynamically reconfiguring bearers based on quality of service parameters to improve throughput rates and ensure continued operation, including the ability to switch on/off based on signal interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If serial transmission manner is used for S1 interface, then routing relay function is provided, but resource utilization cannot be effectively coordinated and optimal system performance cannot be achieved
Solution Approach 1:
The patent segments the data transmission path by introducing a direct S1 interface at the RN, separating the control plane (through DeNB) from the user plane (direct at RN). This allows parallel processing of control and data traffic, improving resource utilization without increasing coordination complexity.
Solution Approach 2:
The patent adds a new dimension to the network architecture by enabling the RN to directly connect to the core network via S1 interface, transforming the previously linear serial transmission into a multi-path parallel structure, thereby achieving optimal system performance.
2Reliability
If RN is used as low-power node with small coverage area, then power consumption is reduced, but continued operation in high-speed movement scenario cannot be ensured
Solution Approach 1:
The patent implements dynamic bearer configuration that adapts to RN operational status. When RN is active, data flows through it; when RN becomes unavailable (e.g., during handover or failure), the bearer is dynamically reconfigured to route through DeNB, ensuring continued operation without requiring RN to maintain high power consumption.
Solution Approach 2:
The patent changes the network topology parameter dynamically by enabling/disabling the direct S1 interface at RN based on operational conditions. This allows the system to switch between low-power mode (RN inactive) and high-reliability mode (RN active with direct S1) without compromising either objective.
3Productivity
If RN coverage area is limited, then interference is reduced, but system capacity cannot be improved in network congestion scenario
Solution Approach 1:
The patent makes the RN multi-functional by enabling it to simultaneously serve as a coverage extension node (with limited area) and a capacity enhancement node (with direct S1 interface). This allows the RN to handle local traffic independently, improving system capacity without requiring expanded coverage area.
Data Source
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AI summary
A relay node RN, a donor eNodeB DeNB and a communication method are disclosed, where the RN includes: a sending module, configured to send an indication message to a donor eNodeB DeNB, where the indication message is used to indicate whether the RN supports data stream aggregation; a receiving module, configured to: when the DeNB determines, according to the indication message, that the RN supports data stream aggregation, receive a request sent by the DeNB, where the request is used to request to communicate with user equipment UE by means of data stream aggregation between the RN and the DeNB; and a configuration module, configured to reconfigure a bearer between the RN and the DeNB according to the request, where the sending module is further configured to instruct the DeNB to communicate with the UE by means of the data stream aggregation between the DeNB and the RN. In this application, a Un bearer is reconfigured to support a data stream aggregation technology, thereby improving a throughput rate of a user in a case of ensuring business continuity.