MBS Session Management Using Location Feedback to Stop Out-of-Area Delivery
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Solution Overview
Problem
In unicast-based multicast transmission, core network devices cannot determine whether terminal devices can correctly receive local multicast and broadcast services, leading to resource waste and transmission failures.
Innovation Solution
Implement a session management function to actively trigger location information reporting for terminal devices, determining if they are within or outside the service area of the multicast and broadcast service, and stop data transmission accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the core network device continues to send MBS data to terminal devices, then the terminal devices within the service area can continue to receive the data, but transmission resources are wasted for terminal devices outside the service area
Solution Approach 1:
The patent implements a feedback mechanism where terminal devices report their location information to the core network device. The core network device uses this feedback to determine whether terminal devices are within the service area and adjusts data transmission accordingly, sending data only to terminal devices located within the service area to avoid resource waste while ensuring reliable delivery.
Solution Approach 2:
The patent makes the data transmission dynamic by continuously monitoring terminal device location information and adjusting transmission behavior in real-time. The core network device dynamically determines whether to send MBS data based on the current location of terminal devices relative to the service area, rather than using a static transmission approach.
2Loss of energy
If the core network device stops sending MBS data to terminal devices, then transmission resources are saved, but the terminal devices within the service area cannot receive the data
Solution Approach 1:
The core network device receives location information feedback from terminal devices and uses this information to make intelligent transmission decisions. By continuously monitoring location reports, the network device can accurately determine which terminal devices are within the service area and send data only to them, ensuring high transmission success rate while optimizing resource efficiency.
Solution Approach 2:
The patent implements preliminary action by having terminal devices proactively report their location information to the core network device before data transmission occurs. This allows the core network device to pre-determine the appropriate transmission targets and avoid unnecessary transmission attempts to terminal devices outside the service area.
3Measurement precision
If the core network device monitors terminal device location continuously, then accurate determination of service area coverage is achieved, but system complexity increases
Solution Approach 1:
The patent applies self-service by having terminal devices autonomously measure and report their own location information to the core network device. This shifts the measurement burden from the network device to the terminal devices, allowing the network device to achieve accurate service area detection without significantly increasing its own complexity.
Solution Approach 2:
The patent implements partial monitoring where the core network device monitors location information only for terminal devices that have subscribed to MBS services. Rather than continuously monitoring all terminal devices in the network, the system focuses monitoring resources on relevant terminal devices, reducing overall system complexity while maintaining accurate service area detection for MBS users.
Data Source
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AI summary
Embodiments of this application relate to a data communication method and an apparatus. In the method, a session management function sends a first message to an access management function based on context information of a multicast session corresponding to a multicast and broadcast service MBS. The first message is for triggering reporting of location information of a first terminal device. When the location information indicates a location of the first terminal device, and the session management function determines, based on the location of the first terminal device, that the first terminal device is located outside a service area of the MBS, or the location information indicates that the first terminal device is located outside a service area of the MBS, the session management function stops sending data to the first terminal device. According to this solution, the session management function can determine whether a terminal device can receive or should continue to receive data at a current location, and when the terminal device cannot receive or should not continue to receive the data, stop sending the data to the terminal device. This can reduce a waste of transmission resources, and improve a data sending success rate.