eNB-to-gNB Handover Using Preloaded System Messages
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Solution Overview
Problem
The latency of a terminal device accessing a gNB during handover from an eNB is high due to the need for security setup and inefficient paging mechanisms.
Innovation Solution
The eNB redirects or hands over the terminal device to a gNB serving cell using system messages, reduces energy consumption by optimizing paging and interface setup, and minimizes the need for additional procedures like TAU.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device uses traditional handover procedure from eNB to gNB, then the handover can be completed with security setup, but the access latency becomes high
Solution Approach 1:
The eNB pre-redirects the terminal device to the gNB serving cell by providing system messages (including SIB1 and other necessary configuration information) before the terminal device would normally need to perform full access procedures. This preliminary redirection includes providing cell identity, frequency information, and system message content, allowing the terminal to quickly access the gNB without waiting for traditional security setup and paging procedures.
2Reliability
If the eNB uses traditional paging mechanism for terminal device management, then the paging can be performed systematically, but the energy consumption increases
Solution Approach 1:
The patent extracts the essential paging functionality from the traditional systematic paging mechanism and implements it directly at the eNB level through targeted redirection. Instead of performing full systematic paging across the network, the eNB directly provides system messages and redirects the terminal to the appropriate gNB serving cell, achieving the necessary paging effect with significantly reduced energy consumption by eliminating redundant network-wide paging procedures.
3Reliability
If the terminal device performs full access procedure including security setup, then the connection is secure, but the access time increases
Solution Approach 1:
The eNB performs preliminary actions by pre-generating and providing system messages that contain necessary configuration information, cell identity, and frequency details to the terminal device before the terminal would normally need to perform full access procedures. This allows the terminal to quickly establish connection with the gNB using the pre-provided information, significantly reducing access time while maintaining connection security through proper authentication protocols.
4Reliability
If the eNB implements detailed interface setup procedures with gNB, then the interface configuration is complete, but the signaling overhead increases
Solution Approach 1:
The patent merges multiple interface setup procedures into a single streamlined process. The eNB combines the functions of system message generation, cell redirection information provision, and gNB configuration into one integrated procedure. By merging these previously separate signaling steps, the patent reduces overall signaling overhead while ensuring complete and accurate interface configuration between eNB and gNB.
Data Source
Figure 1A~1B
Figure 1C~2
Figure 3
AI summary
This application discloses a communication method and a related device. The method includes: An evolved NodeB eNB receives a first message sent by a terminal device, where the first message is for requesting to access the eNB. The eNB sends a second message to the terminal device, where the second message includes a system message corresponding to at least one serving cell of a gNB, and the second message indicates the terminal device to be redirected to one of the at least one serving cell of the gNB, or the second message indicates the terminal device to be handed over to one of the at least one serving cell of the gNB. The terminal device may receive the system message of the serving cell of the gNB from the eNB, to access the gNB. In this way, the terminal device can quickly access the gNB.