SFN RCU Functionality Transfer Mechanism
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Solution Overview
Problem
In single frequency networks, existing technologies face challenges in seamlessly transferring Resource Control Unit (RCU) functionality and context information between entities as the network cluster moves, expands, or shrinks, particularly for effective intra-SFN-Cluster interference mitigation.
Innovation Solution
A method for transferring RCU operational control functionality from one node to another, involving selecting candidate nodes, requesting and evaluating information, and initiating the transfer of RCU context information, including MAC scheduling aspects, to ensure seamless exchange and adaptation of RCU functionality within the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If RCU functionality is transferred between nodes in an SFN cluster, then network adaptability and interference mitigation are improved, but system complexity and information transfer requirements increase
Solution Approach 1:
The RCU functionality is segmented into transferable context information that can be moved between nodes. The context information includes MAC scheduling aspects and other operational parameters that are separated from the node hardware, allowing independent transfer and assignment to different SFN cluster nodes.
Solution Approach 2:
A standardized interface is introduced as an intermediary mechanism between RCU nodes. This interface defines the format and protocol for context information transfer, simplifying the complexity by providing a uniform method for functionality exchange without requiring custom solutions for each node pair.
2Reliability
If RCU context information is transferred between nodes, then seamless handover and service continuity are improved, but information transfer overhead and time increase
Solution Approach 1:
Context information is prepared and made available for transfer in advance. The RCU maintains its operational context in a transferable format that can be quickly transmitted to another node when handover is required, reducing the actual transfer time during critical handover events.
Solution Approach 2:
The RCU context information is copied from the source node to the target node rather than requiring complex real-time synchronization. This copying mechanism allows the target node to assume the RCU functionality with minimal delay, ensuring service continuity while keeping transfer time acceptable.
3Object-affected harmful factors
If MAC scheduling functionality is transferred with RCU, then intra-SFN-Cluster interference mitigation is improved, but processing complexity and resource requirements increase
Solution Approach 1:
The MAC scheduling functionality is transferred as part of the RCU context, enabling the target node to locally perform interference mitigation scheduling decisions. This local processing capability allows each node to independently optimize resource allocation and mitigate interference without requiring centralized control, reducing overall system processing complexity.
Data Source
AI summary
The invention provides a method of transferring resource control unit operational control functionality within a single frequency network, in which multiple transmission points transmit identical downlink data packets in a synchronized manner, from a first node to a second node, the method comprising receiving at a resource control unit a set of resource control information from at least one candidate node; determining using the resource control information a suitability of the at least one candidate node to be the second node; and initiating transfer of the resource control unit operational control functionality from the first node to the second node.