Mobile Station Handover Announcement for Network Parameter Adjustment
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Solution Overview
Problem
Existing network handover methods do not consider improving Quality of Service (QoS) to prevent handovers once they are determined necessary, leading to potential disruptions in communication.
Innovation Solution
A method where a terminal announces potential handover to a second network, allowing the first network to update operational parameters to maintain communication, thereby deciding whether to perform a handover based on compared parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a terminal determines that a second network offers better operational parameters, then the terminal initiates a handover to the second network, but this may cause unnecessary handover disruptions and communication interruptions
Solution Approach 1:
The terminal sends a handover announcement message to the current network before actually handing over to the target network. This preliminary action allows the current network to evaluate whether to improve its operational parameters to retain the terminal, potentially avoiding the handover entirely and maintaining communication continuity.
Solution Approach 2:
The current network receives the handover announcement and responds with updated operational parameters based on its evaluation. This feedback mechanism allows the network to counter the handover request by offering improved service conditions, thereby preventing unnecessary handovers and maintaining reliable communication.
2Reliability
If the terminal performs handover to the second network with better operational parameters, then the Quality of Service improves, but the complexity of the handover decision-making process increases
Solution Approach 1:
The handover announcement message acts as an intermediary mechanism between the terminal and the current network. It carries information about the target network's operational parameters and enables the current network to make an informed decision about whether to improve its parameters and retain the terminal, simplifying the overall decision-making process.
3Reliability
If the current network updates operational parameters in response to handover announcement, then the need for handover may be obviated, but this requires additional signaling overhead and network resources
Solution Approach 1:
The current network dynamically changes its operational parameters (such as bandwidth, data rates, or service conditions) in response to receiving a handover announcement. By adjusting these parameters, the network can make its service more attractive to the terminal, potentially avoiding the handover and reducing overall signaling overhead compared to completing a full handover procedure.
Data Source
AI summary
When a mobile station MS1 determines during communication through a first network (1), that a second network (7) is available that offers better operational parameters for the communication, the mobile station sends a handover announcement (S 5.3) to the first network to offer it an opportunity to improve the operational parameters for the communication through the first network. The first network (1) may in response offer updated operational parameters (S5.6) with a view to encouraging the communication to continue through the first network. A decision (S5.7) whether to make a handover to the second network can then be made by comparing the updated operational parameters for the first network with the operational parameters for the second network.