Coordinated Multi-Point Handover Skipping Random Access
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current mobile and wireless telecommunication systems, particularly in 5G networks, face challenges in seamless handover of coordinated multi-point connections, leading to potential disruptions and inefficiencies due to the need for random access procedures and timing advances during cell changes.
Innovation Solution
The method involves sending a radio resource control reconfiguration message from a network node to user equipment, instructing it to skip random access procedures and reuse timing advances during handovers between cells, allowing for a coordinated multi-point connection to be transferred without interruptions, enabling efficient handover and reduced signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If random access procedures are performed during handover from serving cell to coordinated multi-point cell, then connection reliability is improved, but handover interruption time increases
Solution Approach 1:
The network node pre-configures the user equipment with timing advance values for the target coordinated multi-point cell before handover execution. This preliminary configuration allows the UE to immediately use the pre-provided timing advance during handover, eliminating the need to perform random access procedures at the target cell, thus reducing handover interruption time while maintaining connection reliability
Solution Approach 2:
The invention extracts and removes the random access procedure step from the handover process by reusing timing advance values from the source cell or pre-configured values. This extraction eliminates the time-consuming random access phase while preserving the essential timing synchronization function, directly reducing handover interruption time without sacrificing connection reliability
2Measurement precision
If random access procedures are performed during coordinated multi-point cell setup, then timing synchronization accuracy is improved, but signaling overhead increases
Solution Approach 1:
The invention merges the timing advance configuration into the existing RRC reconfiguration message that is already being sent during coordinated multi-point cell setup. By combining the timing advance information with the cell configuration message, the patent eliminates separate signaling exchanges, reducing signaling overhead while maintaining timing synchronization accuracy through the provided timing advance values
3Measurement precision
If timing advance is obtained through random access procedure, then timing accuracy for the target cell is improved, but handover complexity increases
Solution Approach 1:
The network node automatically determines and provides the appropriate timing advance value to the user equipment during handover configuration, eliminating the need for the UE to autonomously perform complex random access procedures. This self-service approach by the network simplifies the UE's handover execution while ensuring timing accuracy through network-provided timing advance values
Data Source
AI summary
Certain example embodiments provide systems, methods, apparatuses, and computer program products for a handover of a coordinated multi-point connection. For example, certain embodiment may transfer a first coordinated multi-point connection (e.g., a further enhanced multiple input multiple output (FeMIMO) connection) to a second coordinated multi-point connection where the network may instruct the UE to not perform at least one random access procedure. The first coordinated multi-point connection may be controlled by a first cell (the serving cell) where the UE is ready to receive from and transmit to a first set of cells that comprises the serving cell and one or more non-serving cells. After handover, the second coordinated multi-point connection may be controlled by a previous non-serving cell, and the UE may be ready to receive from and transmit to a second set of cells that comprises the previous non-serving cell.