User Equipment Intersystem Handover PDU Session Mapping
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Solution Overview
Problem
The increasing number of user equipment (UEs) and data/control information in wireless communication systems poses a challenge due to limited radio resources, necessitating an efficient method for transmitting/receiving uplink/downlink data and control information, as well as an efficient intersystem handover between legacy and next-generation systems.
Innovation Solution
The proposed solution involves efficient intersystem handover methods and radio resource management to improve overall throughput, allowing seamless transition between different communication systems while maintaining service continuity and optimizing resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of user equipments and data/control information increases, then communication capacity demand increases, but radio resources become limited and insufficient
Solution Approach 1:
The patent segments the handover process into multiple phases (measurement phase, handover execution phase, resource allocation phase) to efficiently manage limited radio resources. By dividing the handover procedure into discrete steps with specific resource allocation at each stage, the system can handle multiple UEs simultaneously without exhausting available radio resources.
Solution Approach 2:
The patent implements preliminary actions by pre-configuring handover parameters, pre-allocating radio resources, and pre-establishing measurement configurations before actual handover occurs. This allows the system to prepare resource allocation in advance, reducing the burden on radio resources during critical handover moments and enabling faster processing of multiple UEs.
2Reliability
If intersystem handover is performed between legacy and next-generation systems, then service continuity is maintained, but handover complexity and resource management difficulty increase
Solution Approach 1:
The patent introduces intermediary elements such as handover configuration messages, measurement reports, and resource allocation indicators that mediate between legacy and next-generation systems. These intermediaries standardize the interaction interface, reducing handover complexity by providing a unified mechanism for resource management across different system types.
Solution Approach 2:
The patent implements universal handover mechanisms that can operate across both legacy and next-generation systems using the same core procedures. By designing multi-functional handover protocols that handle multiple system types through unified resource allocation and measurement mechanisms, the patent reduces handover complexity while maintaining service continuity across diverse network environments.
Data Source
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AI summary
A user equipment according to the present invention performs a handover from a first system to a second system. When a user equipment receives a command to hand over to the second system, while using a plurality of protocol data unit (PDU) sessions for the same data network (DN) in the first system, the user equipment transmits first session information of a first PDU session among the plurality of PDU sessions, establishes a packet data network (PDN) connection with the second system, on the basis of the first session information, and maps the first PDU session to the PDN connection. When the user equipment is required to establish a dedicated bearer for a PDU session (second PDU session) other than the first PDU session among the plurality of PDU sessions, the user equipment transmits a bearer generation request message requesting to generate a dedicated bearer for the PDN connection.