UPF Multicast Data Duplication for V2X Bandwidth Reduction
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Solution Overview
Problem
Current wireless communication technologies for V2X (Vehicle to Everything) communication, particularly in platooning scenarios, face inefficiencies in bandwidth usage due to one-to-one communication modes, which can hinder the optimization of vehicle-to-vehicle and vehicle-to-infrastructure communication.
Innovation Solution
A wireless communication method where a first UPF entity receives a message from an SMF entity containing multicast addresses and session information, duplicates service data, and sends it to multiple second terminals using multicast addresses and session information, optimizing communication by reducing bandwidth consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If one-to-one communication mode is used for V2X communication, then each terminal can receive dedicated data, but bandwidth consumption increases significantly
Solution Approach 1:
The patent merges multiple one-to-one communication streams into a single multicast stream. The SMF entity consolidates data destined for multiple second terminals into one multicast data flow sent to the first terminal, which then distributes it locally. This combining approach maintains reliable data delivery to all recipients while dramatically reducing uplink bandwidth consumption from the network.
Solution Approach 2:
The first terminal acts as an intermediary in this communication architecture. It receives multicast data from the network via the SMF entity and then distributes it to multiple second terminals. This intermediary role allows the network to send data once instead of multiple times, reducing bandwidth consumption while ensuring each terminal receives its intended data through the mediator's distribution logic.
2Ease of operation
If traditional one-to-one communication is used, then communication simplicity is maintained, but communication efficiency deteriorates
Solution Approach 1:
The patent combines multiple individual communication paths into a single multicast path managed by the SMF entity. Instead of establishing separate connections for each terminal pair, the system creates one multicast stream that serves multiple terminals, thereby improving communication efficiency while the underlying complexity is abstracted away from end users.
Solution Approach 2:
The patent changes the communication parameter from individual unicast addresses to a group multicast address. This parameter change enables the network to address multiple terminals simultaneously through a single data stream, significantly improving communication efficiency. The complexity is managed through automated multicast group management by the SMF entity rather than manual configuration.
3Loss of energy
If multicast communication is implemented without proper session information management, then bandwidth is saved, but device complexity increases
Solution Approach 1:
The SMF entity serves as an intermediary that manages the complexity of multicast session information. It maintains the mapping between multicast groups and individual terminal sessions, handling the complex task of tracking which terminals belong to which multicast groups. This centralizes the complexity management in a dedicated control function rather than distributing it across multiple devices.
Solution Approach 2:
The first terminal copies the multicast data it receives from the network and distributes the copies to multiple second terminals. This copying mechanism enables efficient data distribution without requiring each terminal to maintain complex session state, as the distribution logic is implemented through data replication rather than complex session management at the edge terminals.
Data Source
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AI summary
Embodiments of this application provide a wireless communication method and a device. The wireless communication method in this application includes: receiving, by a first user plane function UPF entity, a first message sent by a session management function SMF entity, where the first message includes a multicast address of a group and session information of at least one second terminal; and duplicating, by the first UPF entity, received first service data to obtain N copies of first service data, and sending the duplicated first service data to each second terminal based on the multicast address and the session information of the at least one second terminal, where the first service data is data that is from a first terminal and whose destination address is the multicast address, and N is a total quantity of the at least one second terminal. Embodiments of this application can implement a wireless communication method applied to V2X, thereby optimizing a vehicle to vehicle communication mode and a vehicle to infrastructure communication mode.