A low-latency transmission method and system for a telecommunications service based on a 5G private network

Abstract

The present application relates to the technical fields of communication technology, and particularly relates to a 5G private network-based low-latency transmission method and system for telecommunication services, comprising the following steps: a terminal monitors application layer data in real time through a built-in service identification engine, and identifies periodic data streams and event-driven data streams according to preset rules; when an event-driven data stream is identified, the terminal sends an event stream triggering signaling to a 5G private network base station; after receiving the event stream triggering signaling, the base station activates a second transmission channel preconfigured for the terminal within a preset time, and switches the event-driven data stream from a first transmission channel to the second transmission channel for transmission; the present application constructs a transmission mechanism of "terminal-side service identification - simplified signaling triggering - network-side dynamic channel switching", provides guaranteed deterministic and extremely low-latency transmission for bursty key event data streams in a 5G private network, and effectively improves network resource utilization.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and in particular to a method and system for low-latency transmission of telecommunications services based on a 5G private network. Background Technology

[0002] To meet the high demands of specific industries for data security, controllability, and quality of service, 5G private networks have emerged. By building dedicated network infrastructure for specific user groups or using network slicing technology to logically isolate dedicated resources within public networks, 5G private networks can provide predictable network performance and highly customized services. The telecommunications services carried in 5G private networks exhibit diverse characteristics, especially some industrial control services, whose data flows can be clearly distinguished into periodic data flows (such as timed reporting of sensor status) and event-driven data flows (such as emergency shutdown commands and security alarms). The former involves small data volumes, regular transmission patterns, and has relatively lenient latency requirements; the latter is characterized by sudden and unpredictable events, requiring extremely low transmission latency and extremely high reliability.

[0003] Currently, in 5G private network transmission schemes, a common approach to ensure low latency is to statically or semi-statically configure a uniform high-priority Quality of Service (QoS) stream for terminal devices. However, this "one-size-fits-all" resource allocation strategy has significant drawbacks: periodic, regular data streams occupy valuable high-priority resources reserved for critical events, leading to low network resource utilization. When truly sudden, critical event data streams occur, their transmission paths may already be occupied by regular data, resulting in resource contention and queuing delays, making it difficult to guarantee the required deterministic, bounded, and extremely low latency. In other words, existing technologies lack a mechanism capable of dynamically, finely, and intelligently scheduling network resources based on real-time changes in the inherent characteristics of services, thus failing to provide accurate QoS guarantees for differentiated services coexisting in a 5G private network environment.

[0004] To address the aforementioned issues, a search revealed a patent with publication number CN111096012B disclosing a method and system for ultra-reliable, ultra-low latency communication transmission. The core of this approach lies in improving transmission reliability through the repeated transmission of downlink control information (DCI) and / or data. For example, by sending repeated DCIs in multiple control resource sets (CORESETs), or scheduling multiple physical downlink shared channel (PDSCH) resources for the same data block, time / frequency diversity or soft combining gains are used to combat channel fluctuations, ensuring successful data reception. However, this approach has the following limitations: First, its optimization methods focus on redundant transmission on the network side, failing to differentiate and handle the real-time characteristics of upper-layer application services on the terminal (such as the periodicity and burstiness of data streams). Second, this repeated transmission mechanism is essentially a static or semi-static resource reservation, leading to the continuous occupation of valuable low-latency resources and preventing 'on-demand allocation'. When periodic business and sudden event business coexist, sudden business may face queuing delays due to resource occupancy, making it difficult to meet the ultra-low latency and bounded latency requirements of scenarios such as the Industrial Internet for sudden critical events.

[0005] In light of this, in-depth research into the aforementioned issues led to the creation of this case. Summary of the Invention

[0006] The purpose of this invention is to provide a low-latency transmission method and system for telecommunications services based on a 5G private network, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a low-latency transmission method for telecommunications services based on a 5G private network, comprising the following steps:

[0008] Step S1, Service Identification: The terminal uses its built-in service identification engine to monitor application layer data in real time and identify periodic data streams and event-driven data streams according to preset rules.

[0009] Step S2, Triggering signaling transmission: When an event-driven data stream is detected, the terminal sends an event stream triggering signaling to the 5G private network base station;

[0010] Step S3, Channel Switching and Data Transmission: After receiving the event stream triggering signaling, the base station activates the second transmission channel pre-configured for the terminal within a preset time and switches the event-driven data stream from the first transmission channel to the second transmission channel for transmission;

[0011] The first transmission channel is used to transmit the periodic data stream, the second transmission channel has a higher priority and pre-scheduling level than the first transmission channel, and the first transmission channel and the second transmission channel are implemented in the 5G private network through independent quality of service streams or protocol data unit sessions.

[0012] Preferably, the preset rule is based on at least one of the following characteristics of the data packet:

[0013] Source or destination port number;

[0014] Application-specific programming interface call identifier;

[0015] Specific flag bits in the packet payload;

[0016] Data transmission periodicity and data packet size.

[0017] Preferably, the event stream triggering signaling is one of the following:

[0018] Media access control elements;

[0019] Simplify radio resource control signaling;

[0020] Short commands sent via pre-configured physical uplink control channel resources.

[0021] Preferably, the first transmission channel is configured as a quality of service flow of the guaranteed bit rate type; the second transmission channel is configured as a quality of service flow of the delay-critical guaranteed bit rate type, and a scheduling-free authorization or pre-scheduling authorization mechanism is enabled.

[0022] Preferably, the delay between the channel switching and data transmission steps does not exceed one transmission time interval.

[0023] Preferably, it also includes conflict resolution steps:

[0024] When multiple terminals simultaneously send event stream triggering signaling, the base station allocates resources to the second transmission channel according to service priority or a preset scheduling algorithm.

[0025] A low-latency transmission system for telecommunications services based on a 5G private network, comprising:

[0026] Enhanced terminal: Built-in service identification engine, used to identify data stream type in real time and send event stream triggering signaling;

[0027] Enhanced base station: configured to receive the trigger signaling and manage the handover between the first transmission channel and the second transmission channel;

[0028] Core network user plane functions: Supports pre-configuring dual-channel QoS policies for the terminals and implements data routing;

[0029] Core network control plane functions: used for session management and policy control, and predefines the parameters of the dual channels.

[0030] Preferably, the resources of the second transmission channel are in a pre-configured dormant state when not inactive, and are only activated upon receiving the event stream trigger signaling.

[0031] Preferably, the enhanced base station further includes a conflict handling module, used to arbitrate and allocate resources of the second transmission channel according to service priority when multiple terminals trigger simultaneously.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] 1. By constructing an integrated transmission mechanism of "terminal-side service identification - simplified signaling triggering - network-side dynamic channel switching", the core problem of the inability to obtain deterministic low-latency guarantee for sudden critical event data streams caused by static resource allocation when 5G private network mixed services coexist is effectively solved.

[0034] 2. By pre-configuring differentiated dual channels for terminals and dynamically switching event-driven data streams to the second transmission channel with higher priority and pre-scheduled authorization, millisecond-level low-latency transmission guarantee for sudden critical services is achieved, while avoiding long-term occupation of high-priority resources by periodic data streams, greatly improving network resource utilization.

[0035] 3. The terminal's built-in service identification engine performs real-time and accurate identification based on multi-dimensional features of data packets, and combined with simplified trigger signaling, ensures low overhead and fast response capabilities on the terminal side. Through the enhanced base station conflict handling mechanism, the system can intelligently arbitrate in multi-terminal competition scenarios, prioritizing high-priority services. Thus, the 5G private network achieves accurate, reliable, efficient, and low-latency transmission of differentiated telecommunications services, meeting the stringent requirements of vertical industries such as industrial control. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the core process of the present invention, which includes terminal-side service identification, simplified signaling triggering, and network-side dynamic channel switching. Detailed Implementation

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Please see Figure 1 This invention provides a technical solution: a low-latency transmission method for telecommunications services based on a 5G private network, comprising the following steps:

[0039] Step S1, Service Identification: The terminal uses its built-in service identification engine to monitor application layer data in real time and identify periodic data streams and event-driven data streams according to preset rules.

[0040] Step S2, Triggering signaling transmission: When an event-driven data stream is detected, the terminal sends an event stream triggering signaling to the 5G private network base station;

[0041] Step S3, Channel Switching and Data Transmission: After receiving the event stream triggering signaling, the base station activates the second transmission channel pre-configured for the terminal within a preset time and switches the event-driven data stream from the first transmission channel to the second transmission channel for transmission;

[0042] The first transmission channel is used to transmit the periodic data stream, the second transmission channel has a higher priority and pre-scheduling level than the first transmission channel, and the first transmission channel and the second transmission channel are implemented in the 5G private network through independent quality of service streams or protocol data unit sessions.

[0043] Furthermore, the preset rules are based on at least one of the following characteristics of the data packets:

[0044] Source or destination port number;

[0045] Application-specific programming interface call identifier;

[0046] Specific flag bits in the packet payload;

[0047] Data transmission periodicity and data packet size.

[0048] Preferably, the event stream triggering signaling is one of the following:

[0049] Media access control elements;

[0050] Simplify radio resource control signaling;

[0051] Short commands sent via pre-configured physical uplink control channel resources.

[0052] Furthermore, the first transmission channel is configured as a quality of service flow of the guaranteed bit rate type; the second transmission channel is configured as a quality of service flow of the delay-critical guaranteed bit rate type, and a scheduling-free authorization or pre-scheduling authorization mechanism is enabled.

[0053] Furthermore, the delay between the channel switching and data transmission steps does not exceed one transmission time interval.

[0054] Furthermore, it also includes conflict resolution steps:

[0055] When multiple terminals simultaneously send event stream triggering signaling, the base station allocates resources to the second transmission channel according to service priority or a preset scheduling algorithm.

[0056] A low-latency transmission system for telecommunications services based on a 5G private network, comprising:

[0057] Enhanced terminal: Built-in service identification engine, used to identify data stream type in real time and send event stream triggering signaling;

[0058] Enhanced base station: configured to receive the trigger signaling and manage the handover between the first transmission channel and the second transmission channel;

[0059] Core network user plane functions: Supports pre-configuring dual-channel QoS policies for the terminals and implements data routing;

[0060] Core network control plane functions: used for session management and policy control, and predefines the parameters of the dual channels.

[0061] Furthermore, the resources of the second transmission channel are in a pre-configured dormant state when not inactive, and are only activated upon receiving the event stream trigger signaling.

[0062] Furthermore, the enhanced base station also includes a conflict handling module, which is used to arbitrate and allocate resources of the second transmission channel according to service priority when multiple terminals trigger simultaneously.

[0063] Example 1: This example uses an industrial automation scenario, where the enhanced terminal is an industrial gateway responsible for collecting data from the field PLC (Programmable Logic Controller) and sensors.

[0064] Step S1, Service Identification:

[0065] The service identification engine running within the enhanced terminal (industrial gateway), as a lightweight software module, continuously monitors its uplink data packets. The preset identification rules can be configured as follows:

[0066] If the source port number of the data packet is 502 (the default port of the Modbus-TCP protocol), and the data packet size is fixed (e.g., 100 bytes), and the sending interval is fixed at 10ms, it is identified as a periodic data stream (e.g., periodic reporting of sensor status).

[0067] If the packet payload contains a specific emergency stop instruction flag (such as 0xEStop), it is immediately identified as an event-driven data stream (such as an emergency stop signal), regardless of its port and size.

[0068] The service identification engine takes less than 0.1ms to perform feature matching on each data packet, resulting in extremely low CPU utilization on the terminal and ensuring real-time response capabilities on the terminal side.

[0069] Step S2: Trigger signaling transmission:

[0070] Upon detecting an emergency stop command (event-driven data stream), the service identification engine immediately triggers the signaling transmission process. The terminal does not initiate a new random access procedure; instead, it uses a dedicated Physical Uplink Control Channel (PUCCH) resource pre-allocated via RRC reconfiguration signaling. On this PUCCH resource, the terminal sends a minimal Media Access Control Element (MACCE) as the event stream trigger signaling. The payload of this MACCE is carefully designed, containing only two bytes: the first byte is an abbreviation of the terminal identifier, and the second byte is a predefined "event stream type code" (e.g., 0x01 represents the highest priority emergency event). The entire signaling transmission duration is controlled within 0.05ms.

[0071] Step S3, Channel Switching and Data Transmission:

[0072] Upon receiving a specific MACCE, the MAC layer of an enhanced base station (gNB) can process it in real time via its built-in fast channel handover scheduling module without reporting to higher layers. The base station completes the following operations within one transmission time interval (TTI, e.g., 0.5ms):

[0073] Resource Activation: Immediately activate the second transmission channel pre-configured for this terminal but in a "dormant" state. This channel corresponds to a Delay-critical Guaranteed Bit Rate (GBR) QoS stream with a 5QI (5G QoS Identifier) ​​of 82, and the ConfiguredGrant mechanism is enabled, allowing the terminal to send data directly without waiting for uplink authorization.

[0074] Data handover and transmission: The base station will quickly switch the emergency stop command data packet that subsequently arrives from the terminal from the default first transmission channel (a normal GBR stream with 5QI of 80, used for transmitting periodic Modbus-TCP data) to the activated second transmission channel for scheduling. Because the second transmission channel enjoys the highest scheduling priority and pre-scheduled resources, the emergency stop command can be sent to the core network user plane function (UPF) with extremely low queuing and transmission latency, and is ultimately routed to the control server located in the edge cloud.

[0075] The end-to-end latency of the entire "identification-trigger-switching-transmission" process can be stably kept within 1ms, meeting the ultra-low latency requirements of scenarios such as emergency stops in industry. After the event stream transmission ends, the base station can put the resources of the second transmission channel back into "sleep" state within a short period of time (such as 1ms) to improve resource utilization.

[0076] Conflict handling: If multiple terminals send event stream triggering signaling at the same time, the base station's conflict handling module will arbitrate according to the pre-configured service priority table (for example, the priority of emergency stop command is higher than that of ordinary alarm), and allocate the resources of the second transmission channel to the high-priority service first.

[0077] Example 2: This example describes the system configuration for implementing the above method.

[0078] Enhanced terminal: Taking an industrial gateway as an example, its hardware includes a processor, memory, and a 5G communication module. The service identification engine is embedded in the memory in software form and executed by the processor to realize real-time service identification and the generation and transmission of trigger signaling.

[0079] Enhanced Base Station (gNB): Contains standard 5G NR base station hardware. Its innovation lies in the addition of software functions for a fast channel handover scheduling module and a conflict handling module to the baseband processing unit. This module is responsible for parsing specific MACCEs reported by the terminal and executing pre-configured dual-channel handover strategies.

[0080] User Plane Function (UPF): Deployed in the edge data center of the campus, it has a pre-built QoS policy library. When a data packet is received from the base station, the UPF performs precise routing based on the QoS Flow ID (QFI) to which the data packet belongs. For example, it prioritizes forwarding data packets corresponding to the second transmission channel of the QFI to the local industrial control server.

[0081] Core network control plane function (SMF): Responsible for session management. When a terminal initially registers and joins the network, the SMF obtains the policy through the standard PCF (Policy Control Function), establishes a PDU session for it that includes the first transmission channel (5QI=80) and the second transmission channel (5QI=82), and sends the corresponding QoS rules to the terminal and the base station to complete the pre-configuration of the dual channels.

[0082] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for low-latency transmission of telecommunications services based on a 5G private network, characterized in that, Includes the following steps: Step S1, Service Identification: The terminal uses its built-in service identification engine to monitor application layer data in real time and identify periodic data streams and event-driven data streams according to preset rules. Step S2, Triggering signaling transmission: When an event-driven data stream is detected, the terminal sends an event stream triggering signaling to the 5G private network base station; Step S3, Channel Switching and Data Transmission: After receiving the event stream triggering signaling, the base station activates the second transmission channel pre-configured for the terminal within a preset time and switches the event-driven data stream from the first transmission channel to the second transmission channel for transmission; The first transmission channel is used to transmit the periodic data stream, the second transmission channel has a higher priority and pre-scheduling level than the first transmission channel, and the first transmission channel and the second transmission channel are implemented in the 5G private network through independent quality of service streams or protocol data unit sessions.

2. The method for low-latency transmission of telecommunications services based on a 5G private network according to claim 1, characterized in that, The preset rules are based on at least one of the following characteristics of data packets: Source or destination port number; Application-specific programming interface call identifier; Specific flag bits in the packet payload; Data transmission periodicity and data packet size.

3. The method for low-latency transmission of telecommunications services based on a 5G private network according to claim 1, characterized in that, The event stream triggering signaling is one of the following: Media access control elements; Simplify radio resource control signaling; Short commands sent via pre-configured physical uplink control channel resources.

4. The method for low-latency transmission of telecommunications services based on a 5G private network according to claim 1, characterized in that, The first transmission channel is configured as a quality of service flow of guaranteed bit rate type; the second transmission channel is configured as a quality of service flow of delayed critical guaranteed bit rate type, and a scheduling-free authorization or pre-scheduling authorization mechanism is enabled.

5. The method for low-latency transmission of telecommunications services based on a 5G private network according to claim 1, characterized in that, The delay between the channel switching and data transmission steps shall not exceed one transmission time interval.

6. The method for low-latency transmission of telecommunications services based on a 5G private network according to claim 1, characterized in that, It also includes conflict resolution steps: When multiple terminals simultaneously send event stream triggering signaling, the base station allocates resources to the second transmission channel according to service priority or a preset scheduling algorithm.

7. A low-latency transmission system for telecommunications services based on a 5G private network for implementing the low-latency transmission method for telecommunications services based on a 5G private network as described in any one of claims 1-6, characterized in that, include: Enhanced terminal: Built-in service identification engine, used to identify data stream type in real time and send event stream triggering signaling; Enhanced base station: configured to receive the trigger signaling and manage the handover between the first transmission channel and the second transmission channel; Core network user plane functions: Supports pre-configuring dual-channel QoS policies for the terminals and implements data routing; Core network control plane functions: used for session management and policy control, and predefines the parameters of the dual channels.

8. A low-latency transmission system for telecommunications services based on a 5G private network according to claim 7, characterized in that, The resources of the second transmission channel are in a pre-configured dormant state when not inactive, and are only activated upon receiving the event stream trigger signaling.

9. A low-latency transmission system for telecommunications services based on a 5G private network according to claim 7, characterized in that, The enhanced base station also includes a conflict handling module, which is used to arbitrate and allocate resources of the second transmission channel according to service priority when multiple terminals trigger the conflict simultaneously.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by a processor, it implements the steps of the method as described in any one of claims 1 to 6.

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