WO2020077577A1

WO2020077577A1 - Data packet transmission method and device

Info

Publication number: WO2020077577A1
Application number: PCT/CN2018/110717
Authority: WO
Inventors: 刘建华; 卢前溪
Original assignee: Oppo广东移动通信有限公司
Priority date: 2018-10-17
Filing date: 2018-10-17
Publication date: 2020-04-23
Also published as: CN111480374B; CN111480374A

Abstract

Disclosed by the present application are a data packet transmission method and device, capable of achieving lower latency and higher clock synchronization accuracy. The method comprises: a first network device obtaining clock synchronization information of a candidate network device, said clock synchronization information being used for selecting a second network device for cooperatively transmitting a data packet, and/or being used for determining the time information of transmission of the data packet.

Description

Data packet transmission method and equipment

Technical field

Embodiments of the present application relate to the field of communications, and more specifically, to a data packet transmission method and device.

Background technique

At present, 5G systems, or New Radio (NR) can be used in industrial automation (Factory automation), Transportation (Industry), Electrical distribution (Electrical) Power Distribution and other application scenarios, which introduces time sensitivity The concept of Time Sensitive Network (TSN). In the TSN network, the 5G core network (5G Core, 5GC) can be used as a TSN bridge (TSN bridge) or a TSN link (TSN link) to provide services for the TSN network and services. In response to this, the NR system needs to provide lower delay guarantee and higher clock synchronization accuracy, so that when the industrial automation business is transmitted in the 5G network, the operation and connection of each point of mechanical operation are accurate, All meet the time requirements. In addition, in order to ensure reliability, the 5G network introduces core network data packets, such as a duplication mechanism based on the N3 interface, so that multiple nodes in the access network can simultaneously transmit this duplicate data packet. Multiple nodes that require the access network involved can provide lower latency guarantees and higher clock synchronization accuracy.

Summary of the invention

Embodiments of the present application provide a data packet transmission method and device, which can achieve lower delay and higher clock synchronization accuracy.

In a first aspect, a data packet transmission method is provided, including: a first network device acquiring clock synchronization information of a candidate network device, the clock synchronization information being used to select a second network device for cooperative transmission of a data packet, and / or Or used to determine the time information for transmitting the data packet.

In a second aspect, a network device is provided that can execute the method in the first aspect or any optional implementation manner of the first aspect. Specifically, the network device may include a functional module for performing the method in the first aspect or any possible implementation manner of the first aspect.

In a third aspect, a network device is provided, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method in the first aspect or any possible implementation manner of the first aspect.

In a fourth aspect, a chip is provided for implementing the above-mentioned first aspect or the method in any possible implementation manner of the first aspect. Specifically, the chip includes a processor for calling and running a computer program from the memory, so that the device installed with the chip executes the method in the first aspect or any possible implementation manner of the first aspect.

In a fifth aspect, a computer-readable storage medium is provided for storing a computer program that causes a computer to execute the method in the first aspect or any possible implementation manner of the first aspect.

According to a sixth aspect, a computer program product is provided, including computer program instructions, which cause the computer to execute the method in the first aspect or any possible implementation manner of the first aspect.

In a seventh aspect, a computer program is provided, which when run on a computer, causes the computer to execute the method in the first aspect or any possible implementation manner of the first aspect.

Based on the above technical solution, by acquiring clock synchronization information of the candidate network device, the first network device can select a suitable network device to cooperate with it to transmit a data packet, and the selected second network device is collaborating with the first network device Clock synchronization can be ensured when the data packet is transmitted, thereby providing lower delay guarantee and higher synchronization accuracy for the transmission of the data packet. The first network device may also determine the time information for the first network device to send the data packet according to the clock synchronization information of the selected network device, so as to ensure that the data packet can be transmitted in a predetermined order in a timely manner.

BRIEF DESCRIPTION

FIG. 1 is a schematic architectural diagram of an application scenario according to an embodiment of the present application.

2 is a schematic flowchart of a data packet transmission method according to an embodiment of the present application.

FIG. 3 is a schematic structural diagram of a network device according to an embodiment of the present application.

4 is a schematic structural diagram of a chip according to an embodiment of the present application.

5 is a schematic block diagram of a communication system according to an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile (GSM) system, Code Division Multiple Access (CDMA) system, wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (General Packet Radio Service, GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-based access to unlicensed spectrum (LTE-U) system, NR-based access to unlicensed spectrum (NR-U) system on unlicensed spectrum, universal mobile communication system (Universal Mobile Telecommunication System, UMTS), global Worldwide Interoperability for Microwave Access (WiMAX) communication Systems, wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (Wireless Fidelity, WiFi), next-generation communications systems or other communication systems.

Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but also support, for example, device to device (Device to Device, D2D) communication, machine-to-machine (M2M) communication, machine type communication (MTC), and vehicle-to-vehicle (V2V) communication, etc. The embodiments of the present application can also be applied to these communications system.

Optionally, the communication system in the embodiments of the present application may be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, or a standalone (SA) configuration. Web scene.

Exemplarily, the communication system 100 applied in the embodiment of the present application is shown in FIG. 1. The wireless communication system 100 may include an access network device 110. The access network device 110 may be a device that communicates with a terminal device. The access network device 110 can provide communication coverage for a specific geographic area, and can communicate with terminal devices located in the coverage area. Optionally, the access network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved type in an LTE system The base station (Evolutional Node B, eNB or eNodeB), or the network side device in the NR system, or the wireless controller in the cloud radio access network (Cloud Radio Access Network, CRAN), or the access network device 110 may be Relay stations, access points, in-vehicle devices, wearable devices, network-side devices in next-generation networks, or network-side devices in future public land mobile networks (Public Land Mobile Network, PLMN), etc.

The wireless communication system 100 further includes at least one terminal device 120 located within the coverage of the access network device 110. The terminal device 120 may be mobile or fixed. Alternatively, the terminal device 120 may refer to an access terminal, user equipment (User Equipment, UE), user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication Device, user agent, or user device. Access terminals can be cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital processing (Personal Digital Assistant (PDA), wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future 5G networks or terminal devices in future evolved PLMNs, etc. Among them, optionally, terminal device 120 may also perform terminal direct connection (Device to Device, D2D) communication.

The access network device 110 may provide services for the cell, and the terminal device 120 communicates with the network device 110 through the transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell, and the cell may be the access network device 110 (For example, a base station) The corresponding cell can be a macro base station or a base station corresponding to a small cell (Small cell). The small cell here may include: a metro cell, a micro cell, and a pico cell (Pico), Femtocell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

The wireless communication system 100 further includes a core network device 130 that communicates with the access network device 110. Optionally, the core network device 130 may be a core network device of a 5G system, for example, an access and mobility management function (Access and Mobility Management Function, AMF), which is responsible for access and mobility management and has authentication for users , Switching, location update and other functions; for example, session management function (Session Management Function, SMF), responsible for session management, including the establishment, modification, release of Packet Data Unit (PDU) session; and for example, user Surface function (User Plane Function, UPF), responsible for user data forwarding. Optionally, the core network device 130 may also be a core network device of an LTE system or other systems.

FIG. 1 exemplarily shows one access network device, one core network device, and three terminal devices, but the present application is not limited to this, and the wireless communication system 100 may further include multiple core network devices, or may include multiple There are two access network devices, and each access network device may include other numbers of terminal devices within the coverage area, which is not limited in this embodiment of the present application.

FIG. 2 is a process interaction diagram of a data packet transmission method according to an embodiment of the present application. The method shown in FIG. 2 may be performed by a first network device, and the first network device may be, for example, the access network device 110 or the core network device 130 shown in FIG. This method can be applied to the scenario of multi-point cooperative transmission (referred to simply as cooperative transmission in this application).

As shown in FIG. 2, the data packet transmission method includes:

In 210, the first network device obtains clock synchronization information of the candidate network device.

Wherein, the clock synchronization information is used to select the second network device used for cooperative transmission of the data packet, and / or used to determine the time information for transmitting the data packet.

In 220, the first network device transmits the data packet based on the clock synchronization information.

Wherein, optionally, the data packet is a data packet in a target service for cooperative transmission.

The clock synchronization information acquired by the first network device may be used to select a network device that cooperatively transmits a data packet, and / or to determine time information for the first network device to send the data packet. For example, the clock synchronization information is used by the first network device to select a network device capable of cooperating with itself to transmit the data packet or the target service; for another example, the clock synchronization information is used by the network device participating in the cooperative transmission to determine what time to use The point in time at which the accuracy is sent to ensure that the data packet is transmitted in time and in order.

It should be understood that the method of the embodiments of the present application is applied to the scenario of multi-point cooperative transmission, such as a dual connection scenario, a switching scenario, a data replication scenario, an industrial automation scenario, a transmission automation scenario, and a power automation scenario. The cooperative transmission refers to that multiple network devices cooperate to deliver data packets to terminal devices. For example, in a dual connection scenario, a primary base station and a secondary base station cooperatively transmit data packets to one or more terminal devices, and for example, two data base stations in a duplicate data scenario. Cooperate to transmit data packets of copied data and data packets of non-replicated data. Multiple network devices participating in cooperative transmission can use different channels for data packet transmission, and certain clock synchronization should be ensured during transmission. When the access network device for cooperative transmission is the same device, the access network device may, for example, determine the time point or time window for transmitting the data packet to the terminal device based on the target service and the information of the terminal device, and / or The order in which different terminal devices are scheduled, and / or determine which data packet is transmitted by which terminal device.

Optionally, after 210, the method further includes: the first network device selecting the second network device for cooperatively transmitting the data packet among the candidate network devices according to the clock synchronization information of the candidate network device; and / or Or, the first network device determines the time information for transmitting the data packet according to the clock synchronization information of the network devices participating in the cooperative transmission.

On the one hand, by acquiring the clock synchronization information of the candidate network device, the first network device can select a suitable network device, that is, the second network device, and cooperate with it to transmit the data packet. The first network device may select one or more network devices to cooperate with it to transmit the data packet, and the selected second network device and the first network device can guarantee clock synchronization when transmitting the data packet, so as The transmission of data packets provides lower delay guarantee and higher synchronization accuracy.

On the other hand, the first network device may determine the time information for the first network device to send the data packet according to the selected network device, such as the clock synchronization information of the previous hop transmission node, etc., so as to ensure that the data packet is in order and timely transmission.

Optionally, the clock synchronization information includes at least one of the following information: clock synchronization accuracy information, the time at which the data packet is sent (for example, GPS time), and the delay processing time for the data packet (for example, relative to the scheduled transmission time Delayed time), transmission completion indication information.

For example, it is assumed that the clock synchronization information of the candidate network device includes the clock synchronization accuracy information of the candidate network device. When the first network device selects the second network device among the candidate network devices for cooperative transmission of data packets according to the clock synchronization information of the candidate network device, the first network device may select a network with the same clock synchronization accuracy as it supports The device acts as a second network device, thereby cooperating with the second network device to transmit the data packet. Assuming that the clock synchronization accuracy supported by the first network device is 0.25us, among the candidate network devices, the first network device should select the network device that supports clock synchronization accuracy of 0.25us as the second network device that cooperates with it to transmit the data packet.

Optionally, the time information for transmitting the data packet includes: a time when the first network device sends the data packet, a time window for the first network device to send the data packet, and the first network device and its previous hop transmission node The time difference between transmitting the data packet, the time when the last hop transmission node sent the data packet, the clock synchronization accuracy of the last hop transmission node transmitting the data packet, and the clock synchronization accuracy of the first network device sending the data packet 2. The transmission completion indication information of the last hop transmission node.

The first network device may determine the time information for the first network device to transmit the data packet according to the clock synchronization information of the network devices participating in the cooperative transmission. For example, the first network device determines the clock synchronization accuracy of transmitting the data packet by itself according to the clock synchronization accuracy of the previous hop transmission node transmitting the data packet. Assuming that the clock synchronization accuracy supported by the first network device is 0.25us or 0.5us, and the accuracy of the packet transmission time of the previous hop transmission node is 0.25us, then the first network device will transmit the data based on the clock synchronization accuracy of 0.25us package. For another example, the first network device may determine the time when the first network device sends the data packet according to the time when the previous hop transmission node sends the data packet and the delay processing time for the last hop transmission node for the data packet. For another example, the first network device may be based on the time when the last hop transmission node sends the data packet, and the time between the time when the first network device sends the data packet and the time when the previous hop transmission node sends the data packet, Determine when the first network device sends the data packet. For another example, further, the first network device may determine the time window for sending the data packet according to the time when it sends the data packet and the delay processing time for the data packet. For another example, further, the first network device may determine the time range for sending the data packet according to the time when it sends the data packet and the notified data packet sending time window.

Of course, optionally, when the first network device is an access network device, the time window may also be indicated by the core network, that is, the core network device indicates the time window to the first network device during the bearer establishment process.

Optionally, in 210, the obtaining of clock synchronization information by the first network device includes: receiving, by the first network device, clock synchronization information of the candidate network device sent by the terminal device.

That is, the clock synchronization information of the candidate network device may be reported by the terminal device to the first network device. The terminal device may monitor the broadcast information sent by the candidate network device, thereby determining the clock synchronization information of these candidate network devices, and report it to the first network device.

Among them, the terminal device may report clock synchronization information of the candidate network device to the network device through, for example, Radio Resource Control (RRC) signaling.

Optionally, before 210, the first network device may send monitoring instruction information to the terminal device, where the monitoring instruction information is used to instruct the terminal device to monitor the broadcast information of the candidate network device to determine clock synchronization of the candidate network device information. For example, the monitoring indication information may be notified to the terminal device through RRC information or broadcast information.

Further, optionally, the first network device may send a list of candidate network devices to the terminal device. Therefore, based on the list, the terminal device monitors and reports the clock synchronization information of the network devices on the list. For example, the first network device may send the list of candidate network devices to the terminal device through RRC signaling or broadcast information.

Optionally, the method further includes: the first network device sends clock synchronization information of the candidate network device to other network devices.

That is to say, after acquiring the clock synchronization information of these candidate network devices, the first network device can also inform the other network devices of the clock synchronization information, so that the clock synchronization information can be exchanged between different network devices, so that more The network device obtains these clock synchronization information. For example, when the first network device is the primary base station, after acquiring the clock synchronization information, it can send the clock synchronization information to the secondary base station or the core network; for example, when the first network device is the secondary base station, it acquires the clock synchronization After the information, the clock synchronization information may be sent to the primary base station or the core network; for example, when the first network device is a core network device, after acquiring the clock synchronization information, it may send the clock synchronization information to the primary base station or the secondary base station .

In the embodiment of the present application, optionally, the first network device and the second network device may both be access network devices. For example, the first network device is a primary access network device such as a master base station (Master eNB, MN), and the second network device is a secondary access network device such as a secondary base station (Secondary eNB, SN); or, the first network The device and the second network device are both secondary access network devices such as secondary base stations.

Or, optionally, the first network device is a core network device, and the second network device is an access network device. For example, the first network device is a core network device, and the second network device is a primary access network device or a secondary access network device.

When the first network device is an access network device, it can select a base station for cooperative transmission of the data packet according to the clock synchronization information of the candidate base station. For example, when the first network device is the primary base station, the secondary base station and / or other cooperative base stations used for cooperative transmission of data packets may be selected according to the clock synchronization information of the candidate secondary base station, for example, a base station based on non-DC transmission. When the first network device is a secondary base station, the secondary base station and / or other cooperative base stations used for cooperative transmission of data packets may be selected according to the clock synchronization information of the candidate secondary base station, for example, a base station based on non-DC transmission.

When the first network device is a core network device, the primary base station and / or the secondary base station used for cooperative transmission of the data packet may be selected according to the clock synchronization information of the candidate network device.

Optionally, the method described in the embodiments of the present application may be applied to an auxiliary access network device attachment process or an auxiliary access network device modification process.

The core network devices in the embodiments of the present application may be, for example, AMF, AMF, and UPF.

Optionally, when the first network device is a core network device, the method further includes: the first network device sends starting node indication information to an access network device participating in cooperative transmission.

Correspondingly, optionally, when the first network device is an access network device, the method further includes: the first network device receives the start node indication information sent by the core network device.

Wherein, the starting node indication information is used to indicate the network device participating in the cooperative transmission of the first data packet in the first transmission target service. The target service is the service to which the data packet that is transmitted in cooperation belongs.

The first network device that transmits the first data packet in the target service may be, for example, the first network device.

The starting node indication information may be sent by the core network device to the access network device participating in the cooperative transmission, so that the access network device knows the network device that transmits the first data packet in the first target service, that is, the target service Start transmission node. Alternatively, the initial transmission node of the target service may also be negotiated and determined by multiple access network devices participating in cooperative transmission. The negotiated initial transmission node may interact between different network devices to enable the core network The device and other access network devices also know the starting transmission node of the target service.

Optionally, when the first network device is a core network device, the method further includes: the first network device sends transmission sequence information to an access network device participating in cooperative transmission.

Accordingly, optionally, when the first network device is an access network device, the method further includes: the first network device receives the transmission sequence information sent by the core network device.

The transmission sequence information is used to indicate the transmission sequence between network devices participating in the cooperative transmission.

The transmission sequence information may be sent by the core network device to the access network device participating in the cooperative transmission, so that the access network device participating in the cooperative transmission knows the transmission sequence of the data packet or the target service between different network devices. Alternatively, the transmission order may be negotiated and determined by multiple access network devices participating in cooperative transmission. The negotiated transmission order may be interacted between different network devices to enable the core network device and other access network devices The transmission sequence of the data packet or the target service between different network devices is also known.

The above-mentioned information can be transferred between the core network device, the access network device, and the access network device, so that each network device participating in the cooperative transmission obtains this information and combines the transmission data packets determined according to the clock synchronization information. Time information, you can send the target service at the exact time according to the predetermined transmission node order.

Optionally, when the first network device is a core network device such as UPF, the method further includes:

When sending the first data packet in the target service to the access network device, the first network device also sends trigger indication information to the access network device, where the trigger indication information is used to trigger the cooperative transmission; and / or,

When the coordinated transmission is completed, the first network device sends release indication information to the access network device, and the trigger indication information is used to instruct the access network device to stop the coordinated transmission.

That is to say, when the cooperative transmission starts, when the core network device sends the first cooperative transmission data packet, it also carries trigger indication information to indicate the start of the cooperative transmission. Furthermore, after the target service transmission is completed, the core network device will send release indication information to inform the network device participating in the cooperative transmission that the cooperative transmission has been completed.

Optionally, the trigger indication information and / or release indication information may interact among all network devices participating in cooperative transmission.

It should be understood that, in the embodiment of the present application, the time when each network device sends a data packet may be, for example, a Global Positioning System (Global Positioning System, GPS) time.

The method described in the embodiments of the present application may be applied to any multi-point cooperative transmission scenario, for example, a dual connection scenario, a switching scenario, a data replication scenario, an industrial automation scenario, a transmission automation scenario, and a power automation scenario.

When the method is applied in a multi-point cooperative transmission scenario, the clock synchronization information can be used to select nodes capable of participating in the cooperative transmission, and / or the transmission point used to participate in the cooperative transmission determines what clock synchronization accuracy (or time is used) Accuracy, transmission time accuracy, etc.) at what point in time the data packet is sent.

For example, when the method is applied in a dual connection scenario, the clock synchronization information can be used for the primary node (primary base station) to select a secondary node (auxiliary base station) for cooperative transmission; when the method is applied in a handover scenario, the clock synchronization information can be Used to select the target base station (or target cell) and the auxiliary target base station (or auxiliary target cell); when the method is applied to the replicated data scenario based on the N3 interface, the clock synchronization information can be used to select the data packet for cooperative transmission of replicated data When the method is used in industrial automation and other scenarios, the clock synchronization information can be used to select the base station or node for cooperative transmission.

Optionally, the cooperatively transmitted data packet may be carried in a dedicated PDU session, or in a dedicated Quality of Service (QoS) flow, or the data packet or the target service to which the data packet belongs comes from A specific data node (data) node.

It should be noted that, without conflict, the embodiments described in this application and / or the technical features in each embodiment can be arbitrarily combined with each other, and the technical solution obtained after the combination should also fall within the protection scope of this application .

It should be understood that in various embodiments of the present application, the size of the sequence numbers of the above processes does not mean that the execution order is sequential, and the execution order of each process should be determined by its function and inherent logic, and should not be applied to the embodiments of the present application The implementation process constitutes no limitation.

The communication method according to the embodiment of the present application is described in detail above. The device according to the embodiment of the present application will be described below with reference to FIGS. 3 to 5. The technical features described in the method embodiment are applicable to the following device embodiments.

FIG. 3 is a schematic block diagram of a network device 300 according to an embodiment of the present application. The network device is the first network device. As shown in FIG. 3, the first network device 300 includes an obtaining unit 310, which is used to:

Obtain clock synchronization information of a candidate network device, the clock synchronization information is used to select a second network device for cooperative transmission of a data packet, and / or used to determine time information for transmitting the data packet.

Therefore, by acquiring the clock synchronization information of the candidate network device, the first network device can select an appropriate network device and cooperate with it to transmit the data packet, so that the selected second network device and the first network device are transmitting the data packet Time can guarantee a certain clock synchronization, thereby providing a lower delay guarantee and higher synchronization accuracy for the transmission of the data packet. The first network device may also determine the time information for the first network device to send the data packet according to the clock synchronization information of the selected network device, so as to ensure that the data packet can be transmitted in a predetermined order in a timely manner.

Optionally, the network device further includes a processing unit 320, configured to: according to the clock synchronization information of the candidate network device, select the second network for cooperatively transmitting the data packet among the candidate network devices Device; and / or, determining the time information for transmitting the data packet according to clock synchronization information of network devices participating in the cooperative transmission.

Optionally, the data packet is a data packet in a target service for collaborative transmission.

Optionally, the clock synchronization information includes at least one of the following information: clock synchronization accuracy information, time when the data packet is sent, delay processing time for the data packet, and transmission completion indication information.

Optionally, the network device further includes a transceiving unit 330, and the acquiring unit is specifically configured to: receive clock synchronization information of the candidate network device sent by the terminal device through the transceiving unit 330.

Optionally, the transceiver unit 330 is specifically configured to: receive radio resource control RRC signaling that carries the clock synchronization information sent by the terminal device.

Optionally, the network device further includes a transceiver unit 330, configured to: send monitoring instruction information to the terminal device, where the monitoring instruction information is used to instruct the terminal device to monitor broadcast information of the candidate network device, to Determining clock synchronization information of the candidate network device.

Optionally, the transceiver unit 330 is specifically configured to: send RRC signaling or broadcast information carrying the monitoring indication information to the terminal device.

Optionally, the transceiver unit 330 is further configured to: send the list of candidate network devices to the terminal device.

Optionally, the transceiver unit 330 is specifically configured to send RRC signaling or broadcast information carrying the list of candidate network devices to the terminal device.

Optionally, the transceiver unit 330 is further configured to: send clock synchronization information of the candidate network device to other network devices.

Optionally, the time information for transmitting the data packet includes: a time when the first network device sends the data packet, a time window for the first network device to send the data packet, and the first network The time difference between the device and the previous hop transmission node to transmit the data packet, the time when the previous hop transmission node sent the data packet, the clock synchronization accuracy of the previous hop transmission node to transmit the data packet, and the The first network device sends the clock synchronization accuracy of the data packet and the transmission completion indication information of the previous hop transmission node.

Optionally, the first network device is a primary access network device, and the second network device is a secondary access network device; or, the first network device and the second network device are both access networks Device; or, the first network device and the second network device are both auxiliary access network devices; or, the first network device is a core network device, and the second network device is an access network device; Alternatively, the first network device is a core network device, and the second network device is a secondary access network device; or, the first network device is a core network device, and the second network device is a primary access network device.

Optionally, the first network device is an access network device, and the transceiver unit 330 is further configured to: receive time window information of the data packet sent by the core network device.

Optionally, the first network device is an access network device, and the transceiver unit 330 is further configured to: receive start node indication information sent by the core network device, and the start node indication information is used to indicate those participating in the cooperative transmission The first network device in a network device that transmits the first data packet in a target service.

Optionally, the first network device that transmits the first data packet in the target service is the first network device.

Optionally, when the first network device is an access network device, the transceiver unit 330 is further configured to: receive transmission sequence information sent by the core network device, and the transmission sequence information is used to indicate a network device participating in the cooperative transmission The order of transmission between.

Optionally, the first network device is a core network device, and the transceiver unit 330 is further configured to: when sending the first data packet in the target service to the access network device, send a trigger indication to the access network device at the same time Information, the trigger indication information is used to trigger the cooperative transmission; and / or, when the cooperative transmission is completed, sending release indication information to the access network device, the trigger indication information is used to indicate the access The network access device stops the cooperative transmission.

Optionally, the time when the data packet is sent is a global positioning system GPS time.

Optionally, the network device is applied in an auxiliary access network device attachment process or an auxiliary access network device modification process.

Optionally, the network device is applied to a multi-point cooperative transmission scenario, and the multi-point cooperative transmission scenario includes at least one of the following scenarios: dual connection scenario, switching scenario, data replication scenario, industrial automation scenario, and transmission automation scenario And power automation scenarios.

Optionally, the data packet is carried in a dedicated protocol data unit PDU session, the data packet is carried in a dedicated quality of service QoS flow, or the data packet or the target service to which the data packet belongs comes from a specific data node .

Optionally, the core network device includes any one of the following devices: an access and mobility management function AMF, a session management function SMF, and a user plane function UPF.

It should be understood that the network device 300 may perform the corresponding operation performed by the first network device in the above method 200, and for the sake of brevity, details are not described herein again.

FIG. 4 is a schematic structural diagram of a network device 400 provided by an embodiment of the present application. The network device 400 shown in FIG. 4 may specifically be the first network device in an embodiment of the present application. The network device includes a processor 410, and the processor 410 may call and run a computer program from a memory to implement various embodiments of the present application. The corresponding process implemented by the first network device in the method will not be repeated here for brevity.

Optionally, as shown in FIG. 4, the network device 400 may further include a memory 420. The processor 410 can call and run a computer program from the memory 420 to implement the method in the embodiments of the present application. The memory 420 may be a separate device independent of the processor 410, or may be integrated in the processor 410.

Optionally, as shown in FIG. 4, the network device 400 may further include a transceiver 430, and the processor 410 may control the transceiver 430 to communicate with other devices, specifically, may send information or data to other devices, or receive other Information or data sent by the device. Among them, the transceiver 430 may include a transmitter and a receiver. The transceiver 430 may further include antennas, and the number of antennas may be one or more.

5 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip 500 shown in FIG. 5 can be applied to the first network device in the embodiment of the present application. The chip includes a processor 510, and the processor 510 can call and run a computer program from the memory to implement various methods of the embodiment of the present application. The corresponding process implemented by the first network device in FIG. 2 will not be repeated here for brevity.

Optionally, as shown in FIG. 5, the chip 500 may further include a memory 520. The processor 510 can call and run a computer program from the memory 520 to implement the method in the embodiments of the present application. The memory 520 may be a separate device independent of the processor 510, or may be integrated in the processor 510.

Optionally, the chip 500 may further include an input interface 530. The processor 510 can control the input interface 530 to communicate with other devices or chips. Specifically, it can obtain information or data sent by other devices or chips.

Optionally, the chip 500 may further include an output interface 540. The processor 510 can control the output interface 540 to communicate with other devices or chips. Specifically, it can output information or data to other devices or chips.

It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as system-on-chips, system chips, chip systems, or system-on-chip chips.

It should be understood that the processor in the embodiment of the present application may be an integrated circuit chip, which has signal processing capabilities. In the implementation process, each step of the foregoing method embodiment may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Specific Integrated Circuit, ASIC), an existing programmable gate array (Field Programmable Gate Array, FPGA) or other available Programming logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present application may be implemented or executed. The general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied and executed by a hardware decoding processor, or may be executed and completed by a combination of hardware and software modules in the decoding processor. The software module may be located in a mature storage medium in the art, such as a random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, and register. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronic Erasable programmable read only memory (Electrically EPROM, EEPROM) or flash memory. The volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (Synchlink DRAM, SLDRAM) ) And direct memory bus random access memory (Direct Rambus RAM, DR RAM). It should be noted that the memories of the systems and methods described herein are intended to include, but are not limited to these and any other suitable types of memories.

It should be understood that the foregoing memory is exemplary but not limiting. For example, the memory in the embodiments of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data) SDRAM (DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is to say, the memories in the embodiments of the present application are intended to include but are not limited to these and any other suitable types of memories.

Embodiments of the present application also provide a computer-readable storage medium for storing computer programs. Optionally, the computer-readable storage medium may be applied to the first terminal device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the first terminal device in each method of the embodiment of the present application, in order to It is concise and will not be repeated here. Optionally, the computer-readable storage medium may be applied to the second terminal device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the second terminal device in each method of the embodiment of the present application, in order to It is concise and will not be repeated here.

An embodiment of the present application also provides a computer program product, including computer program instructions. Optionally, the computer program product may be applied to the first terminal device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the first terminal device in each method of the embodiments of the present application, for simplicity And will not be repeated here. Optionally, the computer program product may be applied to the second terminal device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the second terminal device in each method of the embodiments of the present application, for simplicity And will not be repeated here.

The embodiment of the present application also provides a computer program. Optionally, the computer program can be applied to the first terminal device in the embodiment of the present application, and when the computer program runs on the computer, the computer is allowed to execute the corresponding implementation of the first terminal device in each method of the embodiment of the present application For the sake of brevity, I will not repeat them here. Optionally, the computer program can be applied to the second terminal device in the embodiment of the present application, and when the computer program is run on the computer, the computer is allowed to execute the corresponding method implemented by the second terminal device in each method of the embodiment of the present application For the sake of brevity, I will not repeat them here.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and / or" in this article is just an association relationship that describes an associated object, indicating that there can be three relationships, for example, A and / or B, which can mean: A exists alone, A and B exist at the same time, exist alone B these three cases. In addition, the character “/” in this article generally indicates that the related objects before and after are in an “or” relationship.

It should also be understood that in the embodiment of the present invention, “B corresponding to (corresponding to) A” means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B based on A does not mean determining B based on A alone, and B may also be determined based on A and / or other information.

Those of ordinary skill in the art may realize that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in hardware or software depends on the specific application of the technical solution and design constraints. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that for the convenience and conciseness of the description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or may Integration into another system, or some features can be ignored, or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application essentially or part of the contribution to the existing technology or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to enable a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. The foregoing storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disks or optical disks and other media that can store program codes .

The above is only the specific implementation of this application, but the scope of protection of this application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in this application. It should be covered by the scope of protection of this application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A data packet transmission method, characterized in that the method includes:

The first network device acquires clock synchronization information of the candidate network device, and the clock synchronization information is used to select a second network device for cooperative transmission of the data packet, and / or to determine time information for transmitting the data packet.
The method according to claim 1, wherein the method further comprises:

The first network device selects the second network device for cooperatively transmitting the data packet among the candidate network devices according to the clock synchronization information of the candidate network device; and / or,

The first network device determines the time information for transmitting the data packet according to clock synchronization information of network devices participating in the cooperative transmission.
The method according to claim 1 or 2, wherein the data packet is a data packet in a target service for cooperative transmission.
The method according to any one of claims 1 to 3, wherein the clock synchronization information includes at least one of the following information:

Clock synchronization accuracy information, time when the data packet is sent, delay processing time for the data packet, and transmission completion indication information.
The method according to any one of claims 1 to 4, wherein the acquiring, by the first network device, clock synchronization information of the candidate network device includes:

The first network device receives the clock synchronization information of the candidate network device sent by the terminal device.
The method according to claim 5, wherein the first network device receiving the clock synchronization information of the candidate network device sent by the terminal device includes:

The network device receives RRC signaling sent by the terminal device and carrying the clock synchronization information.
The method according to claim 5 or 6, wherein the method further comprises:

The first network device sends monitoring indication information to the terminal device, where the monitoring indication information is used to instruct the terminal device to monitor broadcast information of the candidate network device to determine clock synchronization information of the candidate network device.
The method according to claim 7, wherein the first network device sending monitoring indication information to the terminal device comprises:

The first network device sends RRC signaling or broadcast information carrying the monitoring indication information to the terminal device.
The method according to any one of claims 5 to 8, wherein the method further comprises:

The first network device sends the list of candidate network devices to the terminal device.
The method according to claim 9, wherein the first network device sending the list of candidate network devices to the terminal device comprises:

The first network device sends RRC signaling or broadcast information carrying the list of candidate network devices to the terminal device.
The method according to any one of claims 1 to 10, wherein the method further comprises:

The first network device sends the clock synchronization information of the candidate network device to other network devices.
The method according to any one of claims 1 to 11, wherein the time information for transmitting the data packet includes:

The time at which the first network device sends the data packet, the time window at which the first network device sends the data packet, and the time difference at which the data packet is transmitted between the first network device and its previous hop transmission node , The time when the last hop transmission node sends the data packet, the clock synchronization accuracy of the last hop transmission node to transmit the data packet, the clock synchronization accuracy of the first network device to send the data packet, all The transmission completion indication information of the previous hop transmission node is described.
The method according to any one of claims 1 to 12, characterized in that

The first network device is a primary access network device, and the second network device is a secondary access network device; or,

Both the first network device and the second network device are access network devices; or,

Both the first network device and the second network device are auxiliary access network devices; or,

The first network device is a core network device, and the second network device is an access network device; or,

The first network device is a core network device, and the second network device is a secondary access network device; or,

The first network device is a core network device, and the second network device is a main access network device.
The method according to any one of claims 1 to 13, wherein when the first network device is an access network device, the method includes:

The first network device receives time window information of the data packet sent by the core network device.
The method according to any one of claims 1 to 13, wherein when the first network device is an access network device, the method further comprises:

The first network device receives the start node indication information sent by the core network device, and the start node indication information is used to indicate the first data packet in the first transmission target service in the network device participating in the cooperative transmission Network equipment.
The method according to claim 15, wherein the first network device to transmit the first data packet in the target service is the first network device.
The method according to any one of claims 1 to 17, wherein when the first network device is an access network device, the method further comprises:

The first network device receives transmission sequence information sent by the core network device, and the transmission sequence information is used to indicate a transmission sequence between network devices participating in the cooperative transmission.
The method according to any one of claims 1 to 17, wherein when the first network device is a core network device, the method further comprises:

When sending the first data packet in the target service to the access network device, the first network device simultaneously sends trigger indication information to the access network device, where the trigger indication information is used to trigger the cooperative transmission; and /or,

When the coordinated transmission is completed, the first network device sends release indication information to the access network device, and the trigger indication information is used to instruct the access network device to stop the coordinated transmission.
The method according to any one of claims 1 to 18, wherein the time when the data packet is sent is a global positioning system GPS time.
The method according to any one of claims 1 to 19, characterized in that the method is applied in a secondary access network device attachment process or a secondary access network device modification process.
The method according to any one of claims 1 to 20, wherein the method is applied to a multi-point cooperative transmission scenario, and the multi-point cooperative transmission scenario includes at least one of the following scenarios:

Dual connection scenarios, switching scenarios, data replication scenarios, industrial automation scenarios, transmission automation scenarios, and power automation scenarios.
The method according to any one of claims 1 to 21, wherein the data packet is carried in a dedicated protocol data unit PDU session, the data packet is carried in a dedicated quality of service QoS flow, or the data The target service to which the packet or the data packet belongs comes from a specific data node.
The method according to any one of claims 1 to 22, wherein the core network device includes any one of the following devices:

Access and mobility management function AMF, session management function SMF and user plane function UPF.
A network device, characterized in that the network device is a first network device, including:

The obtaining unit obtains clock synchronization information of the candidate network device, and the clock synchronization information is used to select a second network device used for cooperative transmission of the data packet, and / or used to determine time information for transmitting the data packet.
The network device according to claim 24, wherein the network device further comprises a processing unit for:

Selecting the second network device for cooperatively transmitting the data packet among the candidate network devices according to the clock synchronization information of the candidate network device; and / or,

The time information for transmitting the data packet is determined according to clock synchronization information of network devices participating in the cooperative transmission.
The network device according to claim 24 or 25, wherein the data packet is a data packet in a target service for cooperative transmission.
The network device according to any one of claims 24 to 26, wherein the clock synchronization information includes at least one of the following information:

Clock synchronization accuracy information, time when the data packet is sent, delay processing time for the data packet, and transmission completion indication information.
The network device according to any one of claims 24 to 27, wherein the network device further includes a transceiver unit, and the acquiring unit is specifically configured to:

Receiving clock synchronization information of the candidate network device sent by the terminal device through the transceiver unit.
The network device according to claim 28, wherein the transceiver unit is specifically configured to:

Receiving radio resource control RRC signaling carrying the clock synchronization information sent by the terminal device.
The network device according to claim 28 or 29, characterized in that the network device further comprises a transceiver unit for:

Sending monitoring instruction information to the terminal device, where the monitoring instruction information is used to instruct the terminal device to monitor the broadcast information of the candidate network device to determine the clock synchronization information of the candidate network device.
The network device according to claim 30, wherein the transceiver unit is specifically configured to:

Sending RRC signaling or broadcast information carrying the monitoring indication information to the terminal device.
The network device according to any one of claims 28 to 31, wherein the transceiver unit is further configured to:

Sending the list of candidate network devices to the terminal device.
The network device according to claim 32, wherein the transceiver unit is specifically configured to:

Sending RRC signaling or broadcast information carrying the list of candidate network devices to the terminal device.
The network device according to any one of claims 24 to 33, wherein the transceiver unit is further used to:

Sending clock synchronization information of the candidate network device to other network devices.
The network device according to any one of claims 24 to 34, wherein the time information for transmitting the data packet includes:

The time when the first network device sends the data packet, the time window for the first network device to send the data packet, and the time difference for transmitting the data packet between the first network device and its previous hop transmission node , The time when the last hop transmission node sends the data packet, the clock synchronization accuracy of the last hop transmission node to transmit the data packet, the clock synchronization accuracy of the first network device to send the data packet, all The transmission completion indication information of the previous hop transmission node is described.
The network device according to any one of claims 24 to 35, characterized in that

The first network device is a primary access network device, and the second network device is a secondary access network device; or,

Both the first network device and the second network device are access network devices; or,

Both the first network device and the second network device are auxiliary access network devices; or,

The first network device is a core network device, and the second network device is an access network device; or,

The first network device is a core network device, and the second network device is a secondary access network device; or,

The first network device is a core network device, and the second network device is a main access network device.
The network device according to any one of claims 24 to 36, wherein the first network device is an access network device, and the transceiver unit is further configured to:

Receiving time window information of the data packet sent by the core network device.
The network device according to any one of claims 24 to 37, wherein the first network device is an access network device, and the transceiver unit is further configured to:

Receiving the start node indication information sent by the core network device, where the start node indication information is used to indicate the network device participating in the first transmission of the first data packet in the target service among the network devices participating in the cooperative transmission.
The network device according to claim 38, wherein the first network device to transmit the first data packet in the target service is the first network device.
The network device according to any one of claims 24 to 39, wherein when the first network device is an access network device, the transceiver unit is further configured to:

Receiving transmission sequence information sent by a core network device, where the transmission sequence information is used to indicate a transmission sequence between network devices participating in the cooperative transmission.
The network device according to any one of claims 24 to 40, wherein the first network device is a core network device, and the transceiver unit is further configured to:

When sending the first data packet in the target service to the access network device, at the same time sending trigger indication information to the access network device, the trigger indication information is used to trigger the cooperative transmission; and / or,

When the cooperative transmission is completed, release indication information is sent to the access network device, and the trigger indication information is used to instruct the access network device to stop the cooperative transmission.
The network device according to any one of claims 24 to 41, wherein the time when the data packet is sent is a global positioning system GPS time.
The network device according to any one of claims 24 to 42, wherein the network device is used in an auxiliary access network device attachment process or an auxiliary access network device modification process.
The network device according to any one of claims 24 to 43, wherein the network device is applied to a multi-point cooperative transmission scenario, and the multi-point cooperative transmission scenario includes at least one of the following scenarios:

Dual connection scenarios, switching scenarios, data replication scenarios, industrial automation scenarios, transmission automation scenarios, and power automation scenarios.
The network device according to any one of claims 24 to 44, wherein the data packet is carried in a dedicated protocol data unit PDU session, the data packet is carried in a dedicated quality of service QoS flow, or the The data packet or the target service to which the data packet belongs comes from a specific data node.
The network device according to any one of claims 24 to 45, wherein the core network device includes any one of the following devices:

Access and mobility management function AMF, session management function SMF and user plane function UPF.
A network device, characterized in that the network device includes a processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute claim 1 The method according to any one of 23 to 23.
A chip, characterized in that the chip includes a processor, and the processor is used to call and run a computer program from a memory so that the device on which the chip is installed executes any one of claims 1 to 23. method.
A computer-readable storage medium, characterized by being used to store a computer program, the computer program causing a computer to execute the method according to any one of claims 1 to 23.
A computer program product, characterized by comprising computer program instructions, the computer program instructions causing a computer to execute the method of any one of claims 1 to 23.
A computer program, characterized in that the computer program causes a computer to execute the method according to any one of claims 1 to 23.