Cell Handover Signaling Using Random Access Msg3
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Solution Overview
Problem
Conventional handover procedures in cellular communication networks suffer from high delays and significant signaling overheads due to the random access process, leading to potential service interruptions.
Innovation Solution
The proposed method involves transmitting the handover complete message during the random access procedure using preconfigured uplink resources, optimizing the handover process by reducing delays and overheads through improved small data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the handover complete message is transmitted after the random access procedure is completed, then the handover procedure follows the conventional sequence, but the handover delay increases and service interruption possibility increases
Solution Approach 1:
The patent applies preliminary action by transmitting the handover complete message during the random access procedure rather than after it completes. Specifically, the handover complete message is embedded in Msg3 of the random access procedure, allowing the message to be sent in advance before the random access is fully completed. This reduces handover delay and minimizes service interruption possibility by overlapping the handover completion signaling with the ongoing random access procedure.
2Loss of information
If separate resources are allocated for random access and handover complete message transmission, then resource allocation is straightforward, but signaling overheads increase
Solution Approach 1:
The patent applies merging by combining the handover complete message transmission with the random access procedure. The handover complete message is transmitted within Msg3 of the random access procedure, merging two separate signaling functions into a single message exchange. This reduces signaling overheads by eliminating the need for separate dedicated resources for handover completion signaling, while the resource allocation complexity is managed through pre-configuration of uplink resources.
Data Source
AI summary
This application provides a handover method and apparatus. User equipment UE obtains configuration information from a base station, where the configuration information indicates to transmit a handover complete message in a procedure of accessing a target cell; and transmits, based on the configuration information, the handover complete message in the procedure of accessing the target cell.