Uplink Duplication MAC CE Frame Construction via Host RAN Node
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Solution Overview
Problem
Existing wireless communication systems face challenges in constructing a Medium Control Element (MAC) control element frame with activation states of all secondary Radio Link Control (RLC) entities across different Radio Access Network (RAN) nodes, leading to potential incorrect activation of RLC entities for uplink duplication in 5G New Radio (5G NR) networks.
Innovation Solution
The proposed solution involves an assisting RAN node receiving RLC activation information from a host RAN node, which includes information on secondary RLC entities in active or inactive states. The assisting node then establishes a MAC control element frame based on this information, ensuring that all secondary RLC entities across different RAN nodes are correctly activated or deactivated for uplink duplication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an assisting RAN node independently determines MAC CE frame construction, then local control flexibility is improved, but activation accuracy of RLC entities deteriorates due to lack of comprehensive information
Solution Approach 1:
The host RAN node acts as an intermediary that collects comprehensive activation information from all RAN nodes and provides it to the assisting RAN node. This intermediary mechanism ensures the assisting node has accurate global state information without needing to independently gather data from multiple sources, thus maintaining activation accuracy while preserving local control flexibility.
Solution Approach 2:
The host RAN node performs preliminary action by collecting and consolidating activation information from all RAN nodes before the assisting node constructs the MAC CE frame. This advance preparation ensures that when the assisting node needs to make decisions, it already has comprehensive and accurate information about the state of all secondary RLC entities across the network.
2Manufacturing precision
If comprehensive activation information is collected from all RAN nodes, then activation accuracy is improved, but information exchange complexity worsens
Solution Approach 1:
The host RAN node merges activation information from all RAN nodes into a single comprehensive data structure. Instead of each node exchanging information separately with multiple others, the host consolidates all information in one place, then distributes the necessary subset to the assisting node. This combining approach maintains activation accuracy while significantly reducing overall system complexity.
Solution Approach 2:
The host RAN node serves multiple functions: it acts as a central information collector, processor, and distributor. By making the host node multi-functional, the system avoids creating separate dedicated information exchange mechanisms between each pair of RAN nodes, thereby reducing overall information exchange complexity while maintaining comprehensive information availability.
3Speed
If RLC entities are activated based on incomplete information, then processing speed is improved, but transmission reliability deteriorates
Solution Approach 1:
The system performs preliminary action by having the host RAN node collect and prepare comprehensive activation information before the assisting node makes activation decisions. This advance preparation ensures that when the assisting node rapidly processes and constructs the MAC CE frame, it is working with complete and accurate information, thus achieving both high processing speed and high transmission reliability.
Solution Approach 2:
The host RAN node provides feedback to the assisting node about the actual state of secondary RLC entities across all RAN nodes. This feedback mechanism ensures that the assisting node's activation decisions are based on accurate, real-time information rather than assumptions or incomplete data, thereby maintaining high transmission reliability while enabling rapid processing.
Data Source
AI summary
Presented are systems, methods, apparatuses, or computer-readable media for controlling uplink (UL) duplication. An assisting radio access network (RAN) node may receive, from a host RAN node hosting a packet data convergence protocol (PDCP) entity, radio link control (RLC) activation information associated with a dedicated radio bearer (DRB) for uplink duplication. The assisting RAN node may establish a medium control element (MAC) control element (CE) frame, according to the RLC activation information.