Uplink Data Packet Signaling for Low-Latency 5G Transmission
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Solution Overview
Problem
Current 5G network technologies face challenges in meeting the low-latency requirements of ultra-reliable and low-latency communications (URLLC) services due to the long latency associated with establishing a Packet Data Unit (PDU) session, which is typically longer than 100 ms, making it difficult to send data efficiently in scenarios like Internet of vehicles and industrial control.
Innovation Solution
A data sending method that incorporates control plane signaling within data packets to instruct PDU session establishment or activation, allowing data to be sent in a sessionless manner before the PDU session is fully established, using a mechanism that includes carrying signaling messages and forwarding information in the data packets to facilitate real-time data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a PDU session is established before sending data, then data transmission reliability is improved, but transmission latency increases beyond 100 ms
Solution Approach 1:
The patent embeds control plane signaling (PDU session establishment requests) within the data packet itself, allowing the establishment process to begin simultaneously with data transmission rather than sequentially before it. This preliminary action eliminates the waiting period for session establishment.
Solution Approach 2:
The patent merges the control plane signaling function with the data plane by embedding PDU session establishment requests directly within data packets. This consolidation allows both control and user data to be transmitted together, eliminating separate signaling overhead and reducing total latency.
2Device complexity
If control plane signaling is separated from data packets, then signaling processing is simplified, but data transmission latency increases
Solution Approach 1:
The patent combines control plane signaling and user data into a single packet structure, where PDU session establishment requests are embedded within the data packet. This merging eliminates the need for separate signaling channels and simultaneous processing, actually simplifying the transmission path while reducing latency.
3Productivity
If data transmission waits for PDU session establishment, then network resource allocation is optimized, but service response time exceeds low-latency requirements
Solution Approach 1:
The patent initiates PDU session establishment in advance by embedding the request within the data packet, so that resource allocation processes begin simultaneously with data transmission rather than after data must wait. This preliminary action enables faster service response while maintaining resource allocation optimization.
Data Source
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AI summary
This disclosure provides a data sending method and apparatus, and a device, and pertains to the field of communications technologies. The method includes: receiving an uplink data packet sent by UE; if a signaling message is carried in the uplink data packet, separating the signaling message from the uplink data packet, where the signaling message is used to request to establish a PDU session or request to activate an established PDU session; forwarding the signaling message to a control plane device; and before an available PDU session exists, forwarding, based on a data forwarding message carried in the uplink data packet sent by the UE, data in the uplink data packet sent by the UE. In this disclosure, before an available PDU session exists, the UE adds the signaling message to the data packet on a data link, and further adds an additional data forwarding message to the data packet. In this way, when a PDU session establishment process or a PDU session activation process is triggered, data can be further sent by using the data forwarding message. Therefore, the data packet can still be sent in real time when no available PDU session exists, thereby meeting a latency requirement of a low-latency service.