Wireless Backhaul Handover With Synchronized Link Resource Allocation
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Solution Overview
Problem
In existing communication systems, wireless backhaul devices cannot be seamlessly handed over to another serving base station during mobility, leading to interruptions in data transmission between the wireless backhaul device and terminal side devices.
Innovation Solution
A method involving network devices exchanging messages to coordinate the handover of wireless backhaul devices, including the use of indication and configuration information to synchronize resource allocation and avoid conflicts, ensuring continuous data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the wireless backhaul device moves to another serving base station, then mobility is supported, but data transmission between the wireless backhaul device and the terminal is interrupted
Solution Approach 1:
The patent applies preliminary action by performing resource configuration for the terminal before the handover of the wireless backhaul device is completed. The source base station configures resources for the terminal to communicate with the target base station through the wireless backhaul device, so that when handover occurs, the terminal already has the necessary resource configuration to maintain continuous data transmission without interruption.
2Reliability
If resource allocation is performed during handover, then data transmission can be maintained, but resource conflicts between the first link and second link occur
Solution Approach 1:
The patent applies segmentation by dividing the resource allocation process into distinct stages: pre-handover resource configuration by the source base station, and post-handover resource allocation by the target base station. The first link resources (between wireless backhaul device and terminal) and second link resources (between target base station and wireless backhaul device) are configured separately with clear timing relationships, avoiding resource conflicts while maintaining data transmission continuity.
Solution Approach 2:
The source base station performs preliminary resource configuration for the terminal before handover completes, including configuring time-frequency resources and indicating resource usage timing. This preliminary action ensures that when the wireless backhaul device connects to the target base station, the terminal already has pre-configured resources to avoid conflicts between first link and second link resources.
3Speed
If the wireless backhaul device is handed over without resource reconfiguration synchronization, then handover speed is maintained, but data transmission is interrupted due to delays
Solution Approach 1:
The patent implements feedback mechanisms where the source base station provides resource configuration information to the terminal before handover, and the target base station receives resource usage timing information from the source base station. This feedback ensures that resource reconfiguration is synchronized with the handover process, allowing the wireless backhaul device to quickly switch base stations without causing data transmission interruptions.
Solution Approach 2:
The source base station performs preliminary resource configuration and sends resource usage timing information to the target base station before handover completes. This preliminary action synchronizes the resource reconfiguration process with handover execution, enabling fast handover while maintaining data transmission continuity without delays.
Data Source
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AI summary
This application relates to a communications method and an apparatus, and relates to the field of communications technologies, to resolve a problem in the prior art that data transmission between a wireless backhaul device and a terminal side device is interrupted because a wireless backhaul device cannot be handed over to another serving base station. The method in this application includes: receiving, by the wireless backhaul device, a message that is sent by a first network device and that is used to indicate the wireless backhaul device to be handed over to a second network device; and sending, by the wireless backhaul device to the second network device in a process in which the wireless backhaul device is handed over to the second network device or in a case in which the wireless backhaul device completes being handed over to the second network device, a message carrying information about a resource of a first link. This application is applicable to a handover procedure of the wireless backhaul device.