eNodeB Handover Data Forwarding via Protocol Layer Processing
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Solution Overview
Problem
During handover in communication systems, data transmission is interrupted for 27.5 ms due to the need for reprocessing unprocessed data received at the PDCP layer by the target eNodeB, leading to data loss and inefficiency.
Innovation Solution
The method involves transmitting processing status information and data information from the source eNodeB to the target eNodeB, allowing the target eNodeB to perform corresponding processing, thereby reducing data loss and improving handover efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the source eNodeB sends unprocessed data received at the PDCP layer to the target eNodeB during handover, then the target eNodeB can continue data transmission, but the data needs to be reprocessed at the target eNodeB causing a 27.5 ms interruption
Solution Approach 1:
The source eNodeB performs preliminary processing of the data before handover occurs. Specifically, the source eNodeB processes the data at lower protocol layers (RLC, MAC, PHY) before forwarding it to the target eNodeB, so that when handover occurs, the target eNodeB receives already-processed data that can be immediately transmitted without reprocessing delays
Solution Approach 2:
The source eNodeB acts as an intermediary that performs the data processing function on behalf of the target eNodeB before handover. By processing the data at lower protocol layers during the handover preparation phase, the source eNodeB eliminates the need for the target eNodeB to reprocess the data after handover, thus reducing the 27.5 ms interruption time
2Reliability
If the target eNodeB reprocesses unprocessed data received at the PDCP layer, then data loss is reduced, but processing delays increase by 27.5 ms
Solution Approach 1:
The source eNodeB performs preliminary processing of data at RLC, MAC, and PHY layers before handover, so the target eNodeB receives data that has already been processed through the complete protocol stack. This eliminates the need for redundant reprocessing at the target eNodeB, maintaining data completeness while avoiding processing delays
Solution Approach 2:
The source eNodeB discards the unprocessed PDCP layer data forwarding approach and recovers efficiency by processing data at lower layers before handover. This allows the system to maintain data completeness through proper forwarding while recovering the 27.5 ms processing speed loss by eliminating redundant reprocessing operations at the target eNodeB
Data Source
AI summary
A method, a system, and equipment for information processing are provided. The method includes receiving information sent by a source eNodeB of UE, where the information includes processing status information and data information which are obtained after the source eNodeB processes data transmitted by the UE, or data information in at least two user plane protocol stacks of the source eNodeB, or data information in user plane protocol stacks except PDCP in the source eNodeB; and correspondingly, transmitting data with the UE according to the processing status information and data information, or the data information in the at least two user plane protocol stacks, or the data information in user plane protocol stacks except PDCP.