Handover Type Determination for Lossless Data Transfer
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Solution Overview
Problem
Wireless communication systems face challenges in handover procedures, particularly when transitioning from one network technology to another, such as from LTE to 5G, due to differences in data rates and network capabilities, leading to potential data loss and congestion issues.
Innovation Solution
A method for determining the capability of user equipment (UE) to maintain buffered data during handover, involving the transmission of an indication of this capability and performing the handover procedure accordingly, allowing for either lossless or lossy data transfer based on the UE's capabilities and the target network's parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If handover procedure is performed between different network technologies (LTE to 5G), then network capability and data rate are improved, but data loss and congestion issues occur
Solution Approach 1:
The system performs preliminary actions by determining UE capability to maintain buffered data before executing the handover procedure. The network device obtains indication information about whether the UE can maintain buffered data during handover, and based on this pre-determined capability, selects the appropriate handover type (lossless or lossy). This preliminary determination prevents data loss by preparing the appropriate handover strategy in advance.
Solution Approach 2:
The system changes the handover parameter (handover type) based on the UE's capability parameter. When the UE indicates it can maintain buffered data, the system selects lossless handover; when the UE cannot maintain buffered data, the system selects lossy handover. This dynamic parameter adjustment resolves the contradiction by adapting the handover approach to the specific UE capabilities.
2Reliability
If buffered data is maintained during handover, then data loss is reduced, but network congestion may increase
Solution Approach 1:
The system applies different handover strategies (local quality) to different UEs based on their individual capabilities. Instead of uniformly maintaining buffered data for all UEs during handover, the system selectively maintains buffered data only for UEs that have the capability to handle it, while using lossy handover for UEs that cannot maintain buffered data. This localized approach prevents unnecessary network congestion while protecting against data loss where applicable.
3Productivity
If handover indication is transmitted to UE, then handover optimization is achieved, but communication complexity increases
Solution Approach 1:
The system extracts only the essential capability information (whether the UE can maintain buffered data) from the UE and transmits this condensed indication to the network device. Instead of exchanging comprehensive capability sets or multiple messages, the system identifies and transmits only the critical parameter needed for handover type determination. This extraction approach achieves handover optimization while minimizing communication complexity.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A serving base station may determine a handover loss metric associated with a UE that is a candidate for handover. The handover loss metric may be based on connection parameters associated with the serving base station and a target base station, respectively. The serving base station may identify, based on the handover loss metric, a type of handover procedure to perform. The serving base station may perform the handover procedure of the UE to the target base station according to the identified handover type.