WO2022052129A1

WO2022052129A1 - Reliability measurement method, apparatus and system

Info

Publication number: WO2022052129A1
Application number: PCT/CN2020/115155
Authority: WO
Inventors: 胡星星; 张宏平
Original assignee: 华为技术有限公司
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2022-03-17
Also published as: CN116097709A

Abstract

The present application provides a reliability measurement method, apparatus and system, capable of implementing measurement of end-to-end reliability. An access network device measures reliability between the access network device and a user equipment (UE); the access network device sends the reliability between the access network device and the UE to a core network device; the core network device determines reliability between the access network device and the core network device; and the core network device determines reliability between the UE and the core network device according to the reliability between the access network device and the UE and the reliability between the access network device and the core network device.

Description

A reliability measurement method, device and system

technical field

The present application relates to the field of communication technologies, and in particular, to a reliability measurement method, device, and system in a wireless communication system.

Background technique

In the 5G (fifth generation) or new radio (NR) mobile communication system, for some services that require high reliability, such as services that require 99.999% of data packets to be successfully sent to the opposite end, the network needs to ensure that the data packets are transmitted reliability. The network also needs to count the reliability indicators of the network, learn the performance indicators of the network, and carry out network optimization in a targeted manner. Reliability can be defined as the success probability that the sender sends X bytes (byte) data packets to the peer within a certain delay. Reliability is related to factors such as packet size, delay, and packet loss rate.

The prior art only provides a method for measuring the end-to-end delay of a data packet, and how to measure or calculate the end-to-end reliability between different network elements in a wireless network has become an urgent problem to be solved.

SUMMARY OF THE INVENTION

The present application provides a reliability measurement method, device and system, which can measure end-to-end reliability.

In a first aspect, a method for measuring reliability is provided, comprising:

The access network device measures the reliability between the access network device and the user equipment UE;

The access network device sends the reliability between the access network device and the UE to the core network device.

With reference to the first aspect, in a first possible implementation manner, before measuring the reliability between the access network device and the user equipment UE, the access network device receives the first information from the core network device an indication information, where the first indication information indicates to perform reliability measurement.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner, the method further includes, the access network device receiving a second indication from the core network device information, the second indication information indicates a reliability measurement period or a reliability reporting period.

With reference to any of the foregoing possible implementation manners, in a third possible implementation manner, the access network device includes a centralized unit control plane CU-CP, a centralized unit user plane CU-UP, and a distributed unit DU;

The access network device measuring the reliability between the access network device and the user equipment UE includes:

The CU-CP sends the first reliability measurement indication information to the CU-UP;

The CU-CP sends the second reliability measurement indication information to the DU;

The CU-CP sends third reliability measurement indication information to the UE;

CU-UP measures the reliability of CU-UP;

CU-UP measures the reliability of the interface between CU-UP and DU;

DU measures the reliability of DU;

The DU sends the measured reliability of the DU to the CU-UP;

CU-UP receives the reliability of the UE measured by the UE;

The CU-UP calculates the reliability between the access network device and the UE according to the reliability of the CU-UP, the reliability of the interface between the CU-UP and the DU, the reliability of the DU and the reliability of the UE.

With reference to the first aspect or the first or second possible implementation manner of the first aspect, in a fourth possible implementation manner, the access network device includes a centralized unit control plane CU-CP, a centralized unit user face CU-UP and distribution unit DU;

The CU-CP sends the first packet loss rate or packet loss number measurement indication information to the CU-UP;

The CU-CP sends the second packet loss rate or packet loss number measurement indication information to the DU;

The CU-CP sends the third packet loss rate or packet loss number measurement indication information to the UE;

CU-UP measures the number of lost packets or the packet loss rate of CU-UP itself;

CU-UP measures the number of lost packets or the packet loss rate of the interface between CU-UP and DU;

The DU measures the number of lost packets or the packet loss rate of the DU;

The DU sends the measured packet loss number or packet loss rate of the DU to the CU-UP;

The CU-UP receives the number of lost packets or the packet loss rate of the UE measured by the UE;

The CU-UP is based on the number of lost packets or the packet loss rate of the CU-UP itself, the number of lost packets or the packet loss rate of the interface between the CU-UP and the DU, the number of lost packets or the packet loss rate of the DU, and the number of lost packets of the UE. or the packet loss rate, and calculate the reliability between the access network device and the UE.

With reference to the first aspect or the first or second possible implementation manner of the first aspect, in a fifth possible implementation manner, the access network device measures the connection between the access network device and the user equipment UE. The reliability includes: the access network device counts the transmission delay of the data packet between the access network device and the UE, and calculates the reliability between the access network device and the UE according to the transmission delay.

In a second aspect, a method for measuring reliability is provided, comprising:

the user equipment UE measures the reliability of the UE;

The UE sends the reliability of the UE to the access network device.

With reference to the second aspect, in a first possible implementation manner, the method further includes: before the UE measures the reliability of the UE, the UE receives reliability measurement indication information from an access network device , the reliability measurement indication information indicates to perform reliability measurement.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner, the method further includes, the UE receiving, by the UE, a measurement period from the access network device.

With reference to the second possible implementation manner of the second aspect, in a third possible implementation manner, the UE measuring the reliability of the UE includes: the UE measuring the reliability of the UE within the measurement period .

A third aspect provides a method for measuring reliability, comprising:

The user equipment UE measures the packet loss rate or the number of lost packets of the UE;

The UE sends the packet loss rate or the number of packet losses of the UE to the access network device.

With reference to the third aspect, in a first possible implementation manner, the method further includes:

Before the UE measures the packet loss rate or the number of packet losses of the UE, the UE receives the measurement indication information of the packet loss rate or the number of packet losses from the access network device, and the measurement of the packet loss rate or the number of packet loss The indication information indicates that the packet loss rate or the number of lost packets is measured.

With reference to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner, the method further includes, the UE receiving, by the UE, a measurement period from the access network device.

With reference to the second possible implementation manner of the third aspect, in a third possible implementation manner, the UE measuring the packet loss rate or the number of lost packets of the UE includes: the UE measuring the Reliability of UE.

In a fourth aspect, a method for measuring reliability is provided, comprising:

The core network device receives the reliability between the access network device and the user equipment UE from the access network device;

The core network device determines the reliability between the access network device and the core network device;

The core network device determines the UE and the core network according to the reliability between the access network device and the UE and the reliability between the access network device and the core network device reliability between devices.

With reference to the fourth aspect, in a first possible implementation manner, the method further includes, the core network device sending first indication information to the access network device, where the first indication information indicates to perform reliability measurement .

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner, the method further includes, the core network device sending second indication information to the access network device, The second indication information indicates a reliability measurement period or a reliability reporting period.

In a fifth aspect, an access network device is provided, including:

a measurement unit, configured to measure the reliability between the access network device and the user equipment UE;

A transceiver unit, configured to send the reliability between the access network device and the UE to the core network device.

With reference to the fifth aspect, in a first possible implementation manner, the transceiver unit is further configured to, before measuring the reliability between the access network device and the UE, receive data from the core network device The first indication information indicates that reliability measurement is performed.

With reference to the fifth aspect, or the first possible implementation manner of the fifth aspect, in the second possible implementation manner, the transceiver unit is further configured to receive the second indication information from the core network device, so The second indication information indicates a reliability measurement period or a reliability reporting period.

With reference to the fifth aspect or the first or second implementation manner of the fifth aspect, in a third possible implementation manner, the measurement unit is configured to measure the reliability between the access network device and the user equipment UE It includes: the measuring unit, configured to count the transmission delay of the data packet between the access network device and the UE, and calculate the reliability between the access network device and the UE according to the transmission delay.

The above-mentioned access network device can also be implemented by a processor and a transceiver (or a transceiver circuit), the processor can implement the function of a measurement unit, and the transceiver (or a transceiver circuit) can implement the function of a transceiver unit.

In a sixth aspect, an access network device is provided, including a centralized unit control plane CU-CP, a centralized unit user plane CU-UP and a distributed unit DU, wherein,

The CU-CP is configured to send the first reliability measurement indication information to the CU-UP, send the second reliability measurement indication information to the DU, and send the third reliability measurement indication information to the user equipment UE;

the CU-UP, for measuring the reliability of the CU-UP, and measuring the reliability of the interface between the CU-UP and the DU;

the DU is further used to measure the reliability of the DU, and send the measured reliability of the DU to the CU-UP;

The CU-UP is further configured to receive the reliability of the UE measured by the UE. According to the reliability of the CU-UP, the reliability of the interface between the CU-UP and the DU, the the reliability of the DU and the reliability of the UE, calculate the reliability between the access network device and the UE, and report the calculated reliability between the access network device and the UE to the core network equipment.

In a seventh aspect, an access network device is provided, including a centralized unit control plane CU-CP, a centralized unit user plane CU-UP, and a distributed unit DU, wherein,

The CU-CP is configured to send the first packet loss rate or packet loss number measurement indication information to the CU-UP, send the second packet loss rate or packet loss number measurement indication information to the DU, and send it to the user equipment UE. Send the third packet loss rate or packet loss measurement indication information;

The CU-UP is used to measure the number of lost packets or the packet loss rate of the CU-UP, and to measure the number of lost packets or the packet loss rate of the interface between the CU-UP and the DU;

The DU is used to measure the number of lost packets or the rate of packet loss of the DU, and send the number of lost packets or the rate of packet loss of the DU obtained by measurement to the CU-UP;

The CU-UP is used to receive the number of lost packets or the packet loss rate of the UE measured by the UE. According to the number of lost packets or the packet loss rate of the CU-UP, the CU-UP and the The number of lost packets or the packet loss rate of the interface between DUs, the number of lost packets or the packet loss rate of the DU and the number of lost packets or the packet loss rate of the UE, calculate the difference between the access network device and the UE. The reliability between the access network equipment and the UE is reported to the core network equipment.

In an eighth aspect, a user equipment UE is provided, including: a measurement unit and a transceiver unit, wherein,

the measuring unit, configured to measure the reliability of the UE;

The transceiver unit is configured to send the reliability of the UE to the access network device.

With reference to the eighth aspect, in a first possible implementation manner, the transceiver unit is further configured to, before the measurement unit measures the reliability of the UE, receive a reliability measurement from the access network device Indication information, where the reliability measurement indication information indicates to perform reliability measurement.

With reference to the eighth aspect, or the first possible implementation manner of the eighth aspect, in a second possible implementation manner, the transceiver unit is further configured to receive a measurement period from the access network device.

With reference to the second possible implementation manner of the eighth aspect, in a third possible implementation manner, the measuring unit configured to measure the reliability of the UE includes: the measuring unit configured to measure the reliability of the UE within the measurement period The reliability of the UE is measured.

The above-mentioned UE may also be implemented by a processor and a transceiver (or a transceiver circuit), where the processor may implement the function of the measurement unit, and the transceiver (or the transceiver circuit) may implement the function of the transceiver unit.

In a ninth aspect, a user equipment UE is provided, including: a measurement unit and a transceiver unit, wherein,

the measuring unit, used to measure the packet loss rate or the number of lost packets of the UE;

The transceiver unit is configured to send the packet loss rate or the number of packet losses of the UE to the access network device.

With reference to the ninth aspect, in a first possible implementation manner, the transceiver unit is further configured to, before the measurement unit measures the packet loss rate or the number of packet losses of the UE, receive data from the access network Packet loss rate or packet loss number measurement indication information of the device, where the packet loss rate or packet loss number measurement indication information indicates to perform packet loss rate or packet loss measurement.

With reference to the ninth aspect, or the first possible implementation manner of the ninth aspect, in a second possible implementation manner, the transceiver unit is further configured to receive a measurement period from the access network device.

With reference to the second possible implementation manner of the ninth aspect, in a third possible implementation manner, the measuring unit configured to measure the packet loss rate or the number of lost packets of the UE includes: The measurement period measures the reliability of the UE.

In a tenth aspect, a core network device is provided, including a transceiver unit and a determination unit, wherein,

the transceiver unit, configured to receive reliability between the access network device and the user equipment UE from the access network device;

The determining unit is configured to determine the reliability between the access network device and the core network device, according to the reliability between the access network device and the UE and the relationship between the access network device and the core network device. The reliability between the core network equipment determines the reliability between the UE and the core network equipment.

With reference to the tenth aspect, in a first possible implementation manner, the transceiver unit is further configured to send first indication information to the access network device, where the first indication information indicates to perform reliability measurement.

With reference to the tenth aspect, or the first possible implementation manner of the tenth aspect, in a second possible implementation manner, the transceiver unit is further configured to send second indication information to the access network device, and the The second indication information indicates the reliability measurement period or the reliability reporting period.

The above-mentioned core network equipment can also be implemented by a processor and a transceiver (or a transceiver circuit), the processor can implement the function of a determination unit, and the transceiver (or a transceiver circuit) can implement the function of a transceiver unit.

In an eleventh aspect, a communication system is provided, including at least two of the aforementioned access network device, core network device, and user equipment UE.

A twelfth aspect provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, which, when executed on a computer, cause the computer to execute the method described in any one of the foregoing aspects.

A thirteenth aspect provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any of the above aspects.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that are required in the description of the embodiments or the prior art.

1 is a schematic structural diagram of a communication system according to an embodiment of the present invention;

2 is a schematic diagram of a protocol stack provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention;

4 is a flowchart of a reliability measurement method provided by an embodiment of the present invention;

5 is a flowchart of another reliability measurement method provided by an embodiment of the present invention;

6 is a flowchart of another reliability measurement method provided by an embodiment of the present invention;

FIG. 7 is a schematic diagram of a delay measurement according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of another delay measurement provided by an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of an access network device according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a UE according to an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a core network device according to an embodiment of the present invention.

detailed description

The embodiments provided by the present invention will be described in detail below with reference to the accompanying drawings. The network architecture and service scenarios described in the embodiments of the present invention are for the purpose of illustrating the technical solutions of the embodiments of the present invention more clearly, and do not constitute a limitation on the technical solutions provided by the embodiments of the present invention. The evolution of the architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present invention are also applicable to similar technical problems.

FIG. 1 shows a schematic diagram of a possible system network of the present application. As shown in FIG. 1, at least one terminal 10 communicates with a radio access network (Radio access network, RAN). The RAN includes at least two base stations: a base station 20 and a base station 30, and only two base stations and one user equipment UE are shown in the figure. The RAN is connected to a core network (core network, CN). The core network includes one or more core network devices. Optionally, the CN may be coupled to one or more external networks (External Network), such as the Internet, a public switched telephone network (public switched telephone network, PSTN) and the like. Wherein, during the movement of the UE, the connection with the radio access network can be switched from the base station 20 to the base station 30. At this time, the base station 20 can be called the source base station, and the base station 30 can be called the target base station. Uu interface) to communicate with the base station.

In long term evolution (LTE) and new radio (NR), UE and base station/access and mobility management function (AMF) entities communicate over the air interface. In order to better process the data, the network protocol defines several protocol stacks, and each stack has different functions, for example, as shown in Figure 2. Among them, the non-access stratum (NAS) layer is the signaling channel between the UE and the AMF. The specific process may be that the UE sends a NAS message to the base station, and the base station transparently transmits the NAS message to the AMF. The NAS message is not parsed during the process. The NAS layer is mainly responsible for some management functions, such as public land mobile network (PLMN) selection, manual selection, access control, registration, subscription information, etc. The specific process can be compared with other protocol layers, such as access ( The access stratum, AS) layer cooperates.

The AS layer refers to the protocol layers other than the NAS layer, which can include radio resource control (RRC), packet data convergence protocol (PDCP), radio link control (radio link control, RLC) , medium access control (MAC), physical layer (PHY), AS layer is mainly responsible for switching, encryption, data retransmission, sorting, sending and other functions.

For ease of understanding, some terms involved in this application are described below.

In this application, the terms "network" and "system" are often used interchangeably. But those skilled in the art can understand its meaning. The communication apparatus described in this application refers to a network element in a communication system, such as a terminal, a base station, and a core network device.

A terminal is sometimes called a user equipment (User Equipment, UE). A UE is a terminal device with a communication function, which can also be called a terminal, and can include a handheld device with a wireless communication function, a vehicle-mounted device, a wearable device, a computing device, or other processing devices connected to a wireless modem. For example, handheld devices, in-vehicle devices, etc. with wireless connectivity. At present, some examples of terminals are: mobile phone (mobile phone), tablet computer, notebook computer, PDA, mobile internet device (MID), wearable device, virtual reality (virtual reality, VR) device, augmented reality (augmented reality, AR) equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, and smart grids wireless terminals, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, etc.

An access network device refers to a radio access network (radio access network, RAN) node (or device) that connects a terminal to a wireless network, usually including a base station. At present, some examples of RAN nodes are: evolving Node B (gNB), transmission reception point (TRP), evolved Node B (evolved Node B, eNB), radio network controller (radio network controller, RNC), Node B (Node B, NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (for example, home evolved NodeB, or home Node B, HNB) , base band unit (base band unit, BBU), or wireless fidelity (wireless fidelity, Wifi) access point (access point, AP), etc. In addition, in a network structure, the access network device may include a centralized unit (centralized unit, CU) node, or a distributed unit (distributed unit, DU) node, or a RAN device including a CU node and a DU node. The RAN equipment including the CU node and the DU node splits the protocol layer of the base station. Some protocol layer functions are centrally controlled by the CU, and the remaining part or all of the protocol layer functions are distributed in the DU, and the CU centrally controls the DU. The access network device or base station in this embodiment of the present application may include a central unit (central unit, CU) and a DU, for example, as shown in FIG. 3 . The CU and the DU may be physically separated, or may be deployed together, which is not specifically limited in this embodiment of the present application. One CU can be connected to one DU, or multiple DUs can share one CU, which can save costs and facilitate network expansion. The segmentation of CU and DU can be divided according to the protocol stack, one of the possible ways is to aggregate the radio resource control (radio resource control, RRC), service data adaptation protocol (service data adaptation protocol, SDAP) and packet data. The protocol (packet data convergence protocol, PDCP) layer is deployed in the CU, and the rest of the radio link control (radio link control, RLC) layer, media access control (media access control, MAC) layer and physical layer are deployed in the DU. The present invention does not completely limit the foregoing protocol stack segmentation mode, and other segmentation modes are also possible. The CU and DU are connected through the F1 interface. CU represents the gNB is connected to the core network through the Ng interface. The CU may further include a centralized unit control plane (CU-CP) node or a centralized unit user plane (CU-UP) node. The CU-CP is responsible for the control plane function, mainly including RRC and PDCP-C. PDCP-C is mainly responsible for encryption and decryption of control plane data, integrity protection, and data transmission. CU-UP is responsible for user plane functions, mainly including SDAP and PDCP-U. The SDAP is mainly responsible for processing the data of the core network and mapping the flow to the bearer. PDCP-U is mainly responsible for data plane encryption and decryption, integrity protection, header compression, serial number maintenance, data transmission, etc. The CU-CP and CU-UP are connected through the E1 interface. CU-CP represents that the gNB is connected to the core network through the Ng interface. Connect to the DU through the F1-C (control plane) interface. The CU-UP is connected to the DU through the F1-U (user plane) interface. Of course, there is also a possible implementation that PDCP-C is also in CU-UP. The access network device mentioned in the embodiments of this application may be a device including a CU, or a DU, or a device including a CU and a DU, or a control plane CU node (CU-CP node) and a user plane CU node (CU-UP node) And the equipment of the DU node. In addition, in other possible cases, the access network equipment may be other apparatuses that provide wireless communication functions for the terminal equipment. The embodiments of the present application do not limit the specific technology and specific device form adopted by the access network device. In this embodiment of the present application, nodes such as CU nodes, CU-CP nodes, CU-UP nodes, CU nodes, and DU nodes may also become entities, devices, or functional units, and may also be referred to as CU-CP, CU-UP, CU for short. , DU, etc., refer to the same meaning. CU, DU, CU-CP, and CU-UP are just examples of names, and devices or entities that implement the same or similar functions may also have other names, which are not limited in this application.

The core network device refers to the device in the core network (CN) that provides service support for the terminal. Currently, some examples of core network devices are: access and mobility management function (AMF) entity, session management function (SMF) entity, user plane function (UPF) Entities, etc., are not listed here. The AMF entity may be responsible for terminal access management and mobility management; the SMF entity may be responsible for session management, such as user session establishment, etc.; the UPF entity may be a user plane functional entity, mainly responsible for connecting external The internet.

Entities in this application may also be referred to as network elements or functional entities. For example, an AMF entity may also be referred to as an AMF network element or an AMF functional entity, and for example, an SMF entity may also be referred to as an SMF network element or an SMF functional entity, etc. For specific network elements or entities, "entities", "network elements", "functional entities", etc. are sometimes omitted. For example, the AMF entity is abbreviated as AMF, and the UPF entity is abbreviated as UPF. In future communication systems, such as 6G, the above-mentioned network elements may also have other names, which are not limited in this application.

The following describes the solution provided by the embodiment of the present invention by taking a 5G network as an example, but the solution of the present invention is not limited to a 5G network. For example, the solution of the present invention can also be applied to LTE, or a subsequent evolution network, or a variety of converged networks, etc. , which is not limited in this embodiment of the present invention.

The embodiment of the present invention provides a reliability measurement solution. This scheme can be applied to the system shown in Figure 1. As shown in Figure 4:

Step 401: The core network device sends first indication information to the access network device, where the indication information instructs the access network device to perform reliability measurement.

The first indication information may specifically indicate to perform uplink reliability measurement, downlink reliability measurement, or uplink reliability measurement and downlink reliability measurement.

The first indication information may also instruct to perform reliability measurement between the access network device and the UE, reliability measurement between the access network device and the core network device, and reliability measurement between the core network device and the UE.

In this embodiment of the present application, reliability may be defined as the probability that the sending end sends a data packet to the receiving end successfully receiving the data packet within a certain delay. Optionally, for the reliability between the access network device and the UE, the delay refers to the transmission of a data packet from the wireless protocol layer 2/layer 3 (L2/L3) service data unit of the sender. , SDU) ingress point to the egress point of the wireless protocol layer L2/L3 of the receiver. Optionally, the packet may set the packet size, such as X bytes (byte). Reliability is related to factors such as packet size, delay, and packet loss rate.

Optionally, the core network device may send second indication information to the access network device, indicating a reliability measurement period or a reliability reporting period.

Optionally, the core network device may send a delay threshold to the access network device, where the delay threshold is used for the access network device to calculate reliability.

Optionally, the above-mentioned first indication information or second indication information is sent by the control plane entity of the core network element.

Optionally, the specific carrying mode of the above-mentioned first indication information or the second indication information can be by adding the above-mentioned indication information in the existing quality of service monitoring (Quality of Service monitoring, QoS monitoring) information element, or in the existing immediately. The above-mentioned indication information is added to the configuration information of immediate Minimization of Drive-Tests (immediate MDT).

Step 402: The access network device receives the first indication information, and the access network device measures the reliability between the access network device and the UE.

Optionally, step 401 is an optional step, the access network device may take the initiative to perform reliability measurement without the core network indication, that is, the access network device may not need to receive the first indication information or the core network device may not need to send the first indication information.

The uplink reliability between the access network device and the UE can be identified as: Reliability_Uu_UL

The downlink reliability between the access network device and the UE can be identified as: Reliability_Uu_DL

Optionally, the access network device measures the uplink/downlink reliability between the access network device and the UE according to the above-mentioned reliability measurement period.

Step 403: The access network device sends the reliability between the access network device and the UE to the core network device.

The access network device may send the above reliability to the control plane entity of the core network element, or may send the above reliability to the user plane entity of the core network element.

Optionally, for the architecture in which the CU and DU are separated as shown in FIG. 3 , the access network device can send the above-mentioned reliability to the control plane entity of the core network element through the CU-CP, or send the above-mentioned reliability through the CU-UP. Sent to the user plane entity of the core network element. It should be noted that, here means that the access network device sends the above-mentioned reliability measurement result between the access network device and the UE (that is, the value corresponding to the reliability) to the core network device.

Optionally, the access network device reports the reliability according to the above-mentioned reliability reporting period. Step 404: The core network device determines the reliability between the access network device and the core network device, and determines the reliability between the UE and the core network device.

Optionally, the core network device in this step may be a core network user plane device, such as UPF.

For reliability between access network equipment and core network equipment:

Downlink reliability: Reliability_NG_DL=1-{sum (number of lost packets (measurement results not received by RAN), the number of packets successfully transmitted but the downlink delay timed out)/CN sent with reliability detection indication or QoS detection total number of packets indicated}.

Uplink reliability: Reliability_NG_UL=1-{sum (number of lost packets (measurement results not received by RAN), the number of packets successfully transmitted but the uplink delay timed out)/CN sent with reliability detection indication or QoS detection total number of packets indicated}. The meaning of the number of lost packets (measurement results fed back by the RAN is not received) is the same as that of the downlink reliability.

Among them: the number of lost packets (measurement results that have not received RAN feedback) is the carrying reliability detection indication or QoS sent by the core network device to the access network device according to whether the core network device has received it from the access network device. It is determined by the response corresponding to the data packet of the detection indication (QoS monitoring Packet indicator, QMP indicator). If it is not received, it is considered that the packet is lost, and the packet belongs to the "number of lost packets (measurement results that did not receive RAN feedback)", that is, the value of the number of lost packets (measurement results that did not receive RAN feedback) plus 1. If received, the core network device calculates the downlink delay and uplink delay between the access network device and the core network device. If the downlink delay exceeds the preset threshold, the core network device considers that the packet is successfully transmitted but the downlink delay Delay timeout packets, that is, the value of "the number of packets successfully transmitted but the downlink delay timeout" is incremented by 1. If the uplink delay exceeds the preset threshold, the core network device considers the packet to be a packet that was successfully transmitted but the uplink delay timed out. Optionally, the data packet carrying the reliability indication or the QoS detection indication sent by the core network device to the access network device also carries the time at which the core network device sent the data packet (which may be referred to as a timestamp T1). Receiving a response from the access network device to the data packet carrying the reliability indication or QoS detection indication sent by the core network device to the access network device means that the core network device has received the data packet carrying the timestamp T1 from the access network device. . Optionally, the data packet carrying the time stamp T1 received by the core network device from the access network device also carries the time (referred to as time) corresponding to the time when the access network device received the data packet carrying the time stamp T1 from the core network device. time stamp T2), and the time when the access network device sends the data packet carrying the time stamp T1 to the core network device (referred to as time stamp T3). The time corresponding to the time when the core network device receives the data packet carrying the time stamp T1 from the access network device is called the time stamp T4. The core network equipment calculates the downlink delay and the uplink delay between the access network equipment and the core network equipment according to T1, T2, T3, and T4. If the core network equipment and the access network equipment are time synchronized, the downlink delay between the access network equipment and the core network equipment is T2-T1, and the uplink delay between the access network equipment and the core network equipment for T4-T3. If the time between the core network equipment and the access network equipment is not synchronized, the downlink delay and the uplink delay between the access network equipment and the core network equipment are both {(T4-T1)-(T3-T2) }/2.

Optionally, in terms of downlink reliability, the number of lost packets (measurement results that have not been received from the RAN) may also mean that the core network device sends the data to the access network device, but the access network device does not receive it. The number of packets. The access network device can obtain the number of unreceived data packets according to the GPRS Tunnelling protocol user plane (GTP-U) sequence number received from the core network device (that is, the access network device finds some If the packet with the GTP-U sequence number is not received, the access network device considers that the corresponding packet is lost). Corresponding to the uplink reliability, the number of lost packets (measurement results that have not been received back from the RAN) may also refer to the number of data packets that the access network equipment sends to the core network equipment but are not received by the core network equipment. The core network device can obtain the number of unreceived data packets according to the GTP-U sequence number received from the access network (that is, the core network device finds that some GTP-U sequence number packets have not been received, then the core network device that the corresponding packet is lost).

It should be noted that the core network equipment can periodically determine the reliability between the access network equipment and the core network equipment. "Number of packets with time-out delay", "Number of packets successfully transmitted but with time-out of uplink delay" and "Total number of packets sent by CN with reliability check indication or QoS check indication" refer to the corresponding statistical results in the corresponding period. The above values are initialized to 0 each time the periodic statistics are performed.

For reliability between UE and core network equipment:

Uplink reliability: Reliability_UL=Reliability_Uu_UL*Reliability_NG_UL

Downlink reliability: Reliability_DL=Reliability_Uu_DL*Reliability_NG_DL

Through the above solution, the access network device first measures the reliability between the UE and the access network device, and feeds it back to the core network device, and then the core network device can calculate the reliability between the UE and the core network device.

After the core network device or access network device obtains reliability, it can know the performance of the network (reliability can be displayed or sent to a third party). The reliability can also be used as a reference when deploying new services on the network, or it can be Reliability adjusts network parameter settings or service parameter settings, etc.

It should be noted that steps 401, 403, and 404 are optional steps, that is, the access network device measures the reliability between the UE and the access network device according to its own needs, or the access network device measures the reliability between the UE and the access network device according to its own needs, or the access network device measures the reliability from other devices (such as network management) Obtain indication information, indicating that the reliability between the UE and the access network device needs to be measured.

In the embodiment of the present application, for the access network device in the above step 402 to measure the reliability between the access network device and the UE, there may be various implementations. The following takes the architecture in which the CU and DU are separated as shown in FIG. 3 as an example to give a further example for step 402, but the present invention is not limited to the following implementations.

Implementation method one:

The reliability measurement between the access network device and the UE is divided into multiple segments, and the corresponding entity first calculates the reliability of each segment, and then comprehensively calculates the reliability between the access network device and the UE.

Optionally, the reliability between the access network element and the UE can be divided into: the reliability of the CU-UP (measured by the CU-UP), the reliability of the F1-U interface between the CU-UP and the DU (measured by CU-UP), reliability of DU (measured by DU), reliability of UE (measured by UE).

For example, as shown in Figure 5, the flow of segmented reliability calculation is as follows:

Step 501: The CU-CP sends the first reliability measurement indication information to the CU-UP, the CU-CP sends the second reliability measurement indication information to the DU, and the CU-CP sends the third reliability measurement indication information to the UE.

The first reliability measurement indication information, the second reliability measurement indication information, and the third reliability measurement indication information may specifically indicate to perform uplink reliability measurement, downlink reliability measurement, or uplink reliability measurement and downlink reliability measurement. Optionally, the measurement directions indicated by the first reliability measurement indication information, the second reliability measurement indication information, and the third reliability measurement indication information may be different. For example, CU-CP notifies CU-UP to measure uplink, CU-CP notifies DU to measure downlink, and CU-CP notifies UE to measure uplink and downlink.

Optionally, the CU-CP may only send reliability measurement indication information to one or both of the CU-UP, the DU and the UE.

Optionally, CU-UP, DU and UE may perform reliability measurement according to the granularity level of data radio bearer (DRB).

Optionally, the CU-CP may send the reliability measurement period or the reporting period to the CU-UP, DU and UE. Optionally, the measurement period or the reporting period may use the existing delay measurement period or reporting period.

Optionally, the CU-CP may send delay thresholds to the CU-UP, DU and UE respectively. Each entity (CU-UP, DU, and UE) performs reliability measurement according to the delay threshold (ie, the delay threshold used by each entity to calculate reliability described below). Optionally, the CU-CP decomposes the delay thresholds between the access network element and the UE sent by the core network control plane entity into the corresponding delay thresholds of each entity. For example, the delay threshold between the access network element and the UE is Thelod1, and the corresponding delay thresholds decomposed into each entity are Thelod2, Thelod3, and Thelod4, where Thelod1=Threlod2+Threlod3+Threlod4.

Optionally, if the core network control plane does not send a delay threshold to the access network device, the access network device may, according to the end-to-end packet delay budget (Packet Delay Budget, PDB) corresponding to the QoS flow carried in the DRB, Get the delay threshold. The end-to-end PDB of qos flow is the upper limit of the delay between the UE and the core network user plane entity (termination and N6 interface, that is, the interface between the core network user plane and the data network), and the core network equipment (such as the core network control plane device) can notify the access network device of the value, or take the value of the PDB corresponding to the 5QI corresponding to the qos flow specified in the existing protocol. The access network device can obtain the corresponding PDB required by the access network device according to the value of the end-to-end PDB and the PDB on the core network side. The corresponding PDB is required on the network device side.

The PDB corresponding to the core network equipment is the PDB between the access network equipment and the user plane of the core network, and can be based on the value specified in the 3GPP TS 23.501 protocol (in this protocol, the core network equipment corresponding to the 5QI corresponding to some QoS flows corresponds to The value of the PDB is specified), or the access network device pre-configures the value of the PDB corresponding to the core network device.

Optionally, step 501 is an optional step, and in this implementation manner, step 502 may be directly performed, that is, each entity does not need to receive reliability measurement indication information from the CU-CP.

Step 502, each entity CU-UP, DU and UE measure the corresponding reliability respectively.

In this embodiment of the present application, the following statistics on the number of lost packets, the number of packets successfully transmitted but timed out, and the total number of packets may refer to the values counted by each entity or device in each measurement period or reporting period.

Reliability of CU-UP: Reliability_CU-UP=1-{sum (number of lost packets, number of packets successfully transmitted but timed out)/total number of packets}. Specifically, it can be divided into uplink and downlink reliability. The reliability is measured by the CU-UP side.

For downlink reliability, the number of lost packets refers to the number of downlink packets lost on the CU-UP side, which means that the CU-UP receives a data packet from the core network user plane entity, but the data packet is not sent to the DU through the F1 port. The number of packets successfully transmitted but the delay timed out refers to the number of packets corresponding to the CU-UP sending the data packets received from the core network user plane entity to the DU, but the downlink delay on the CU-UP side exceeds a certain threshold. The total number of packets refers to the total number of packets received by the CU-UP from the core network user plane entity.

For uplink reliability, the number of lost packets refers to the number of uplink packets lost on the CU-UP side, the number of packets received by the CU-UP from the DU but not sent to the core network user plane entity by the CU-UP and the /or the CU-UP has not received the number of PDCP sequence numbers (sequence numbers, SN) from the DU (that is, the CU-UP has not received the number of packets corresponding to certain PDCP sequence numbers from the DU). The number of packets successfully transmitted but the delay timed out refers to the number of packets corresponding to the CU-UP sending the data packet to the core network element, but the uplink delay on the CU-UP side exceeds a certain threshold. The total number of packets refers to the total number of uplink PDCP sequence numbers from the sequence number corresponding to the first data packet sent by the DU to the CU-UP to the sequence number corresponding to the last data packet (including the CU-UP does not receive PDCP from the DU). number of serial numbers). The first data packet and the last data packet here are the data packets in one measurement period.

The downlink delay on the CU-UP side is defined as: the difference between the time when the CU-UP receives a data packet from the core network user plane entity to the time when the CU-UP sends the data packet to the DU. The calculation method of the uplink delay on the CU-UP side is as follows: when the CU-UP receives a PDCP service data unit (PDCP Service Data Unit, PDCP SDU) from the DU to the time when the CU-UP sends the data packet to the core network user plane The difference between the entity's moments.

Optionally, the data packet here refers to a PDCP layer data packet (such as PDCP SDU) or an SDAP layer data packet (such as SDAP SDU).

Reliability of the F1-U interface: Reliability_F1=1-{sum (number of lost packets, number of packets successfully transmitted but timed out)/total number of packets)}. Specifically, it can be divided into uplink and downlink reliability. For downlink reliability, it is measured by the DU side. For uplink reliability, it is measured by the CU-UP side.

For downlink reliability, the number of lost packets refers to the number of data packets sent by the CU-UP to the DU but not received by the DU. The DU can obtain the number of unreceived data packets according to the GTP-U sequence number received from the CU-UP (that is, the DU finds that the packets with some GTP-U sequence numbers have not been received, and the DU considers that the corresponding packets are lost. ). The number of packets successfully transmitted but with time-out delay refers to the number of data packets for which the DU has received the corresponding data packet, but the downlink delay of the corresponding data packet (that is, the downlink delay of the F1-U interface) exceeds a certain threshold. The total number of packets refers to the number of packets (including the number of lost packets) between the sequence number corresponding to the first data packet received by the DU from the CU-UP to the sequence number of the last data packet. Optionally, the data packet here refers to a PDCP layer data packet (such as a PDCP protocol data unit (PDCP protocol data unit, PDCP PDU)).

For uplink reliability, a similar approach to downlink can be used. The number of lost packets refers to the number of packets that the DU sends to the CU-UP but is not received at the CU-UP. CU-UP can obtain the number of unreceived data packets according to the GTP-U sequence number received from DU (that is, CU-UP finds that some GTP-U sequence number packets have not been received, then CU-UP considers the package is lost). The number of packets successfully transmitted but with time-out delay refers to the number of data packets for which CU-UP has received the corresponding data packet, but the upstream delay of the corresponding data packet (that is, the upstream delay of the F1-U interface) exceeds a certain threshold. The total number of packets refers to the number of packets (including the number of lost packets) between the sequence number corresponding to the first data packet sent by the DU to the CU-UP to the sequence number of the last data packet. Optionally, the data packets here refer to PDCP layer data packets (such as PDCP SDUs).

The downlink delay (that is, the downlink delay of the F1-U interface) is defined as: the moment when the CU-UP sends a data packet to the DU, and when the CU-UP receives feedback from the DU that the GTP-U packet transmission status has been successfully sent The difference between the times of the message, minus the processing delay on the DU side, and then divide by 2. The uplink delay and downlink delay have the same value. That is, (the time when the CU-UP receives the GTP-U packet transmission status message from the DU that reports that the packet has been successfully sent-the time when the CU-UP sends a data packet to the DU-the processing delay on the DU side)/2.

Optionally, the CU-UP may also consider the uplink and downlink reliability to be the same value. For example, the CU-UP adopts the above definition of uplink reliability to obtain the uplink reliability, and the value of the downlink reliability and the value of the uplink reliability are obtained. same.

Optionally, the reliability of the CU-UP and F1 ports can be calculated as a whole. The specific definitions are as follows:

For downlink reliability, packet loss means that the CU-UP receives a data packet from the core network user plane entity, but the packet is not successfully received by the DU. A packet that is successfully transmitted but has a time-out delay means that the CU-UP has received a data packet from the core network user plane entity and the packet is correctly received by the DU, but the downlink delay corresponding to the packet exceeds a certain threshold. The total number of packets refers to the number of data packets received by the CU-UP from the core network user plane entity. Optionally, the data packet here refers to a PDCP layer data packet (such as PDCP SDU) or an SDAP layer data packet (such as SDAP SDU).

For uplink reliability, packet loss means that the CU-UP received the packet from the DU, but the CU-UP did not send the packet to the core network. A packet that is successfully transmitted but has a time-out delay means that the CU-UP receives the packet from the DU and sends the packet to the core network element, but the uplink delay corresponding to the packet exceeds a certain threshold. The total number of packets refers to the number of data packets received by the CU-UP from the core network user plane entity. The total number of packets refers to the total number of uplink PDCP sequence numbers from the sequence number corresponding to the first data packet sent by the DU to the CU-UP to the sequence number corresponding to the last data packet (including the CU-UP does not receive PDCP from the DU). number of serial numbers). The first data packet and the last data packet here are the data packets in one measurement period. Optionally, the data packet here refers to a PDCP layer data packet (such as PDCP SDU) or an SDAP layer data packet (such as SDAP SDU).

The downlink delay is defined as: the downlink delay of the CU-UP side + the downlink delay of the F1-U interface. The upstream delay is defined as: the upstream delay of the CU-UP side + the upstream delay of the F1-U interface.

Reliability of DU: Reliability_DU=1-{sum (number of lost packets, number of packets successfully transmitted but timed out by delay)/total number of packets)}. Specifically, it can be divided into uplink and downlink reliability. Both downlink and uplink reliability are measured by the DU side.

For downlink reliability, the number of lost packets refers to the number of packets that the DU has received from the CU-UP, but the DU has not successfully sent the packet to the UE. The number of packets successfully transmitted but the delay timed out means that the DU successfully sends the packet to the UE, but the corresponding downlink delay exceeds the threshold. The total number of packets refers to the total number of packets received by the DU from the CU-UP. Optionally, the data packet here refers to a PDCP layer data packet (such as a PDCP PDU).

For uplink reliability, the number of lost packets refers to the number of data packets that the DU has received from the UE, but the DU has not sent the packet to the CU-UP. The number of packets successfully transmitted but the delay timed out means that the DU sends the packet to the CU-UP, but the corresponding uplink delay on the DU side exceeds the threshold. The total number of packets refers to the total number of packets received by the DU from the UE. Optionally, the data packet here refers to a PDCP layer data packet (such as a PDCP PDU).

The downlink delay is defined as: the RLC layer of the DU processes the downlink delay + the downlink delay of the MAC layer of the DU to determine that the UE correctly receives the RLC SDU. The downlink delay of the RLC layer processing of the DU is defined as: the difference between the time when the RLC layer receives the RLC SDU from the F1-U interface to the time when the MAC layer schedules the last part of the RLC SDU. The downlink delay from the MAC layer of the DU to determining that the UE correctly receives the RLC SDU is defined as: the difference between the time when the MAC layer receives the corresponding RLC SDU and the time when the DU determines that the last part of the RLC SDU is correctly received by the UE (for RLC UM mode, the DU determines whether the UE receives correctly according to the HARQ feedback. For the RLC AM mode, the DU determines whether the UE receives correctly according to the RLC feedback).

The uplink delay is defined as: the RLC layer of the DU processes the uplink delay + the uplink delay that the DU processes the transmission data packets at the air interface. The RLC layer processing uplink delay of DU is defined as: the difference between the time when the RLC receives the first part of an RLC SDU and the time when the RLC layer sends the RLC SDU to the PDCP or CU. The uplink delay of DU processing transmission data packets on the air interface is defined as: the difference between the uplink transmission time of the uplink MAC SDU indicated by the uplink grant corresponding to an uplink MAC SDU and the time when the MAC layer correctly receives the uplink MAC SDU.

Reliability of UE: Reliability_UE=1-{sum (number of lost packets, number of packets successfully transmitted but timed out)/total number of packets)}.

Specifically, it can be divided into uplink and downlink reliability. Both downlink and uplink reliability are measured by the UE.

For uplink reliability, the number of lost packets refers to the number of packets received by the PDCP layer of the UE from the upper layer, but the UE has not successfully sent the packets to the access network device (eg, base station). The number of packets successfully transmitted but with time-out delay means that the UE successfully sends the packet to the access network device, but the corresponding uplink delay exceeds the threshold. The total number of packets refers to the total number of packets received by the PDCP of the UE from the upper layer.

For downlink reliability, the number of lost packets refers to the number of data packets that the UE does not correctly receive from the access network equipment (for example, the UE obtains the number of unreceived data packets according to the PDCP sequence number received from the access network equipment, That is, the UE finds that the packets of some PDCP sequence numbers have not been received, and the UE considers the packets to be lost). The number of packets successfully transmitted but with time-out delay refers to the number of data packets that the UE receives from the access network device, but the downlink delay on the UE side exceeds a certain threshold. The total number of packets refers to the number of data packets correctly received by the UE from the access network device and the number of lost packets.

The downlink delay is defined as: the difference between the moment when the UE correctly receives a downlink data packet and the moment when the PDCP of the UE sends the data packet to the upper layer. The correct reception of a downlink data packet by the UE is defined as: for the RLC UM mode, the MAC layer of the UE correctly receives a data packet, and for the RLC AM mode, the RLC layer of the UE correctly receives a data packet.

The uplink delay is defined as: the difference between the time when the PDCP layer of the UE receives a data packet from the upper layer to the time when the UE obtains the uplink authorization to send the uplink data packet, including the time when the UE obtains the uplink authorization and sends a scheduling request or random access the delay of the entry process.

Step 503: The DU sends the measured reliability to the CU-UP.

Step 504: The UE reports the measured reliability to the CU-UP.

Optionally, the UE may send the measured reliability to the CU-CP, and the CU-CP then forwards it to the CU-UP.

Step 504 is optional.

Step 505, the CU-UP calculates the reliability between the access network device and the UE according to the reliability reported by the DU and the UE.

Reliablity_Uu=Reliability_CU-UP*Reliability_F1*Reliability_DU*Reliability_UE (calculated separately for uplink and downlink) or Reliablity_Uu=Reliability_CU-UP*Reliability_F1*Reliability_DU. It should be noted that the uplink and downlink reliability between the access network device and the UE are calculated according to the above formula by using the CU-UP, F1, DU and the uplink and downlink reliability of the UE respectively.

The CU-UP may notify the core network user plane entity of the calculated reliability between the access network device and the UE, and this step may correspond to step 403 in the foregoing.

Optionally in the embodiment of the present application, the access network device may perform reliability measurement between the access network device and the UE according to the DRB granularity. If the core network device instructs to measure the reliability of a certain QoS flow, the access network device can perform certain conversion. For example, the access network device considers that each qos flow carried in a certain DRB has the same reliability.

Optionally, the reliability between the access network device and the UE, and the reliability between the access network device and the core network device (such as the UPF) can be counted or measured separately, that is, only the relationship between the access network device and the UE can be measured. reliability, or only the reliability between the access network equipment and the UPF is counted.

Implementation method two:

This implementation method is similar to the previous implementation mode 1, and the reliability is measured by segments. The difference is that in the implementation mode 2, the reliability of each entity is not directly measured, but the packet loss of each segment or entity is measured or counted. Finally, the CU-UP calculates the reliability between the access network element and the UE according to the packet loss rate or the number of packet losses reported by each entity.

Optionally, the measurement of the packet loss rate or the number of lost packets between the access network device and the UE can be divided into: the packet loss rate or the number of lost packets of CU-UP (measured by CU-UP), CU-UP and DU The packet loss rate or number of lost packets (measured by CU-UP) of the F1-U interface between the Measurement). For the measurement of the number of lost packets of each segment or entity, refer to Implementation Mode 1. The packet loss rate is the number of lost packets/total number of packets. For the definition of the total number of packets, refer to the description in Implementation Mode 1, which will not be repeated here.

As shown in Figure 6, the measurement process is as follows:

Step 601: CU-CP sends first packet loss rate or packet loss number measurement indication information to CU-UP, CU-CP sends second packet loss rate or packet loss number measurement indication information to DU, and CU-CP sends first packet loss rate or packet loss number measurement indication information to UE. 3 Packet loss rate or packet loss measurement indication information.

The first packet loss rate or packet loss measurement indication information, the second packet loss rate or packet loss measurement indication information, and the third packet loss rate or packet loss measurement indication information can specifically indicate the uplink packet loss rate or packet loss number. Measurements, Downlink Loss Rate or Packet Loss Measurement, or Upstream Packet Loss Rate or Packet Loss Measurement and Downstream Packet Loss Rate or Packet Loss Measurement. Optionally, the measurement directions indicated by the first packet loss rate or packet loss number measurement indication information, the second packet loss rate or packet loss number measurement indication information, and the third packet loss rate or packet loss number measurement indication information may be different. For example, CU-CP notifies CU-UP to measure uplink, CU-CP notifies DU to measure downlink, and CU-CP notifies UE to measure uplink and downlink.

Optionally, the CU-CP may only send the packet loss rate or packet loss number measurement indication information to one or both of the CU-UP, the DU and the UE.

Step 602: Each entity CU-UP, DU and UE measure the corresponding packet loss rate or the number of lost packets respectively.

The CU-UP measures or counts the number of lost packets or the packet loss rate of the CU-UP itself.

CU-UP measures or counts the number of lost packets or the packet loss rate of the F1 interface.

The DU measures or counts the number of lost packets or the packet loss rate of the DU.

The UE measures or counts the number of lost packets or the packet loss rate of the UE.

Step 603: The DU sends the measured number of lost packets or the packet loss rate to the CU-UP.

Step 604: The UE reports the measured number of lost packets or the packet loss rate to the CU-UP.

Optionally, the UE may send the measured packet loss number or packet loss rate to the CU-CP, and the CU-CP then forwards it to the CU-UP.

Step 605: The CU-UP then calculates the reliability between the access network device and the UE according to the number of lost packets or the packet loss rate reported by the DU and the UE.

CU-UP measures reliability: CU-UP counts the uplink and downlink delay and packet loss rate between the access network equipment and the UE to calculate the reliability between the access network element and the UE.

The CU-UP may notify the core network user plane entity of the calculated reliability, and this step may correspond to step 403 in the foregoing.

Uplink reliability between the access network device and the UE: Reliability_Uu_UL=1-{sum (the number of uplink packets lost, the number of packets successfully received but the delay exceeds the threshold)/the total number of data packets of CU-UP in the statistical period }.

The number of lost uplink packets is the number of lost packets of the CU-UP counted by the CU-UP + the number of lost packets of the F1 interface + the number of lost packets of the DU + the number of lost packets of the UE, or only the number of lost packets of the CU-UP. The number of lost packets of CU-UP, the number of lost packets of F1 interface, the number of lost packets of DU, and the number of lost packets of UE can be seen in the description in Implementation Mode 1.

If in step 601, the CU-CP notifies each entity to measure the packet loss rate, the number of lost packets is the uplink packet loss rate*the total number of data packets of the CU-UP in the statistical period. Upstream packet loss rate is 1-(packet loss rate of CU-UP counted by 1-CU-UP)*(packet loss rate of 1-F1 interface)*(packet loss rate of 1-DU)*(1-F1 interface The packet loss rate)*(1-UE's packet loss rate), or only the packet loss rate counted by CU-UP. The number of packets successfully received but the delay exceeds the threshold is: when the uplink delay between the access network device and the UE calculated by CU-UP in a statistical period exceeds a certain threshold, it is considered that the statistical period in the statistical period All packets are successfully received but the uplink delay exceeds the threshold. When the uplink delay between the access network device and the UE calculated by CU-UP in a statistical period does not exceed a certain threshold, it is considered that the packets counted in the statistical period do not meet the requirements: successfully received but the delay exceeds the threshold . The total number of packets of CU-UP in the statistical period is the number of lost uplink packets and the number of packets successfully received by CU-UP. The uplink delay between the access network device and the UE refers to the sum of the uplink delays of each segment in the first implementation.

Downlink reliability between the access network device and the UE: Reliability_Uu_DL=1-{sum (the number of downlink packets lost, the number of packets successfully sent to the UE but the delay exceeds the threshold)/CU-UP from the core network within the statistical period The total number of packets received by the network element}.

The number of uplink packets lost is the number of lost packets on the CU-UP counted by the CU-UP + the number of lost packets on the F1 interface + the number of lost packets on the DU + the number of lost packets on the UE side, or only the number of lost packets on the UE side. The number of lost packets of CU-UP, the number of lost packets of F1 interface, the number of lost packets of DU, and the number of lost packets of UE can be seen in the description in Implementation Mode 1.

If in step 601, the CU-CP notifies each entity to measure the packet loss rate, the number of lost packets is the downlink packet loss rate*the total number of data packets received by the CU-UP from the core network elements within the statistical period. The downlink packet loss rate is 1-(the packet loss rate of CU-UP counted by 1-CU-UP)*(packet loss rate of 1-F1 interface)*(packet loss rate of 1-DU)*(1-F1 interface The packet loss rate)*(1-UE's packet loss rate), or only the packet loss rate counted by CU-UP. The number of packets successfully sent to the UE but the delay exceeds the threshold is: when the downlink delay between the access network device and the UE calculated by CU-UP in a statistical period exceeds a certain threshold, it is considered that the statistical period is counted. The packets are sent successfully but the delay exceeds the threshold. When the downlink delay between the access network device and the UE calculated by CU-UP in a statistical period does not exceed a certain threshold, it is considered that the packets counted in the statistical period do not meet the requirements: successfully sent to the UE but the delay exceeds The number of packets with the threshold. The downlink delay refers to the sum of the downlink delays of each segment in the first implementation manner.

Implementation three:

In this implementation mode, different from the segmented measurement or statistics in the first implementation mode, the access network device counts the overall transmission delay of the data packet between the access network device and the UE, and then calculates the difference between the access network device and the UE according to the delay. reliability between UEs.

The uplink reliability between the access network device and the UE: Reliability_Uu_UL=1-{sum (the number of uplink packets lost, the number of packets successfully received but the delay exceeds the threshold)/the total number of data packets in the statistical period}.

The number of lost uplink packets refers to the number of packets for which the uplink delay measurement has been performed between the access network device and the UE, but the uplink delay result of the data packet has not been calculated (for example, the access network device notifies the UE of a certain Uplink delay measurement is performed on each uplink data packet, but the uplink data packet has not been successfully received by the access network device, for example, the uplink data packet has not been sent by the UE, or the UE has sent it but the access network device has not successfully received it) . The number of packets successfully received but the delay exceeds the threshold refers to the data packets whose uplink delay exceeds a certain threshold after the uplink delay measurement of the uplink data packet is performed between the access network device and the UE. Number of. The total number of data packets in the statistical period refers to the number of data packets for which uplink delay measurement has been performed.

Downlink reliability between the access network device and the UE: Reliability_Uu_DL=1-{sum (the number of downlink packets lost, the number of packets successfully received but the delay exceeds the threshold)/the total number of data packets in the statistical period}.

The number of lost downlink packets refers to the number of packets for which downlink delay measurement has been performed between the access network device and the UE, but the downlink delay result of the data packet has not been calculated (for example, the access network device notifies the UE of a certain Downlink delay measurement is performed on each downlink data packet, but the downlink data packet has not been successfully received by the UE, for example, the downlink data packet has not been sent by the access network device or the access network device has sent it but the UE has not successfully received it, or the downlink data packet has not been successfully received by the UE. The network access device notifies the UE to measure the downlink delay of a certain downlink data packet, but the data packet for which the UE feeds back the downlink delay information is not successfully received by the access network device). The number of packets successfully received but the delay exceeds the threshold refers to the number of data packets whose downlink delay exceeds a certain threshold after the downlink delay measurement of the downlink data packet is performed between the RAN side and the UE. . The total number of data packets in the statistical period refers to the number of data packets for which downlink delay measurement is performed.

Wherein, how the access network device calculates the overall transmission delay of the data packet between the access network device and the UE, the embodiment of the present application provides the following example.

Example 1: The sender adds a time stamp to the data packet, and the receiver obtains the transmission delay of the data packet according to the time of receiving the data packet and the time stamp carried in the data packet.

For example, for the downlink delay, for a data packet that needs to be measured for downlink delay, the access network device carries a timestamp when transmitting the data packet (for example, the PDCP layer of the access network device adds a time stamp to the packet header of the PDCP PDU) Timestamp, which indicates the time when the PDCP layer of the access network device receives the PDCP SDU corresponding to the PDCP PDU from the upper layer, that is, T_send). Optionally, the access network device carries a delay measurement indication information when transmitting the downlink data packet, indicating whether the data packet needs to perform downlink delay measurement (for example, the PDCP layer of the access network device adds this in the packet header of the PDCP PDU). instructions). When the UE receives the data packet, the UE records the moment when the PDCP layer of the UE submits the data packet (such as PDCP SDU) to the upper layer, and denote it as T_receive. Optionally, the UE learns whether downlink delay measurement of the data packet needs to be performed according to the delay measurement indication information sent by the access network device. If the downlink delay measurement needs to be performed, the UE can calculate the downlink transmission delay of the data packet as: T_receive-T_send; optionally, the UE can send the uplink transmission delay measurement result to the access network device, or the UE can send the The T_receive is sent to the access network device, and the access network device can calculate the downlink delay corresponding to the data packet according to the T_receive and the T_send stored by the access network device itself.

For example, for the uplink delay, for the data packet that needs to be measured for the uplink delay, the UE carries a timestamp when transmitting the data packet (for example, the PDCP layer of the UE adds a timestamp to the packet header of the PDCP PDU, and the timestamp Indicates the moment when the PDCP layer of the UE receives the PDCP SDU corresponding to the PDCP PDU from the upper layer, that is, T_send). Optionally, the UE carries a delay measurement indication information when transmitting an uplink data packet, indicating whether the data packet needs to perform uplink delay measurement (for example, the PDCP layer of the UE adds the indication information in the packet header of the PDCP PDU). Optionally, for the uplink transmission delay, the UE may send T_send to the access network device in other forms, such as sending T_send to the access network device through an RRC message. Optionally, the RRC message also carries the PDCP sequence number of the PDCP layer corresponding to the data packet corresponding to the T_send. When the access network device receives the data packet, the access network device records the time when the PDCP layer of the access network device submits the data packet (such as PDCP SDU) to the upper layer, which is recorded as T_receive. The access network device can calculate the uplink transmission delay of the data packet as: T_receive-T_send.

In the embodiment of the present application, the method for measuring the transmission delay of a data packet between the core network device and the access network device and the transmission delay between the access network device and the UE can be implemented in multiple ways, which are given below. An example, but the application is not limited to the following implementations.

For the delay between core network user plane (such as UPF) and RAN equipment (such as base station), the method is as follows:

The core network control plane sends a delay statistics indication to the RAN device, indicating that the delay between the RAN device and the UPF needs to be measured. The indication may be up, down, up and down.

When the core network user plane sends a packet to the RAN device, it will carry an indication (such as QoS monitoring Packet indicator, QMP) in the GTP-U header, indicating that the packet is used for uplink/downlink packet delay measurement. At the same time, the downlink sending timestamp T1 is also carried, and the downlink sending timestamp is the moment when the user plane of the core network sends the packet. The moment may be the local time of the user plane of the core network.

When the RAN device receives the data packet, the RAN device records the received T1, and simultaneously records its own local time T2 when the packet is received. This time can be the local time of the RAN device.

The RAN device sends an uplink packet to the user plane of the core network, and the uplink packet may carry the uplink data sent by the UE, or may not carry the uplink data sent by the UE. The GTP-U header of the packet carries T1, T2, the time T3 when the RAN device sends the packet, and an indication (such as QoS monitoring Packet indicator), indicating that the packet is used for uplink/downlink packet delay measurement. The moment when the RAN device sends the packet may be the local time of the RAN device. When the user plane of the core network receives the uplink packet, it will record the time T4 when the uplink packet is received. The RAN device may also carry the uplink delay between the RAN device and the UE and the downlink delay between the RAN device and the UE in the uplink packet. The uplink delay between the RAN device and the UE and the uplink delay between the RAN device and the UE are measured by the RAN device. Optionally, the RAN device may also carry the uplink delay between the RAN device and the UE and the downlink delay between the RAN device and the UE in other uplink packets (that is, the corresponding uplink packets do not carry T1, T2, and T3).

Referring to Figure 7, the uplink delay between the RAN device and the UE includes PDCP queuing delay (D1), air interface uplink delay measured by DU (D2.1), RLC delay measured by DU (D2.2), F1 port uplink delay (D2.3), PDCP reordering delay (D2.4).

D1 is defined as the delay from when the PDCP layer of the UE receives a data packet from the upper layer to when the UE obtains the uplink authorization to send the uplink data packet, including the delay of the UE sending a scheduling request or random access process to obtain the uplink authorization.

The definition of D2.1 is: the delay from the uplink transmission time of the uplink data packet indicated by the uplink grant corresponding to an uplink data packet (such as MAC SDU) to the correct receipt of the data packet by the base station

The definition of D2.2 is: the base station receives the first part of an RLC SDU and sends the RLC SDU to the PDCP or CU.

The definition of D2.3 is: the CU-UP sends a data packet to the DU, and the CU-UP receives the GTP-U packet transmission status message from the DU that the packet has been successfully sent, minus the processing delay on the DU side. Then divide by 2.

The definition of D2.4 is: the CU-UP receives a PDCP SDU from the DU to the CU-UP and sends the data packet to the user plane of the core network.

Referring to Figure 8, the downlink delay between the RAN device and the UE includes the downlink air interface delay (D1), the RLC layer processing downlink delay of the DU (D2), the F1 interface downlink delay (D3), and the CU-UP side downlink delay. (D4).

The downlink air interface delay (D1) is defined as: the difference between the time when the MAC layer receives the corresponding RLC SDU and the time when the DU determines that the last part of the RLC SDU is correctly received by the UE (for the RLC UM mode, the DU is determined according to HARQ feedback Whether the UE is receiving correctly. For RLC AM mode, the DU determines whether the UE is receiving correctly according to the RLC feedback).

The downlink delay (D2) of the RLC layer processing of the DU is defined as: the difference between the time when the RLC layer receives the RLC SDU on the F1-U interface to the time when the MAC layer schedules the last part of the RLC SDU.

The downlink delay of the F1 port is the same as the uplink delay of the F1 port.

The downlink delay (D4) on the CU-UP side is defined as the difference between the time when the CU-UP receives a data packet from the user plane of the core network to the time when the CU-UP sends the data packet to the DU.

These delays described above are average delays over a period of time or period.

Corresponding to the reliability measurement methods given in the foregoing method embodiments, the embodiments of the present application also provide corresponding communication apparatuses (sometimes also referred to as communication equipment) and communication systems, where the communication apparatuses include a communication apparatus for performing each of the foregoing embodiments. Each part of the corresponding module or unit. The modules or units may be software, hardware, or a combination of software and hardware. The communication apparatus and system are only briefly described below. For the details of the solution implementation, reference may be made to the description of the foregoing method embodiments, which will not be repeated in the afternoon.

The present application provides an access network device for implementing the method of the method embodiment corresponding to FIG. 4 . As shown in FIG. 9 , the access network device includes:

Optionally, before measuring the reliability between the access network device and the user equipment UE, the transceiver unit is further configured to receive first indication information from the core network device, the first indication The information indicates that reliability measurements are made.

Optionally, the transceiver unit is further configured to receive second indication information from the core network device, where the second indication information indicates a reliability measurement period or a reliability reporting period.

For implementation mode 3 of the foregoing method embodiment, the measuring unit measuring the reliability between the access network device and the user equipment UE includes:

The measuring unit is configured to count the transmission delay of the data packet between the access network device and the UE, and calculate the reliability between the access network device and the UE according to the transmission delay.

The above-mentioned access network device may also be implemented by a processor and a transceiver (or a transceiver circuit) or other hardware plus software.

For the first implementation manner of the foregoing method embodiment, the embodiment of the present application provides an access network device, referring to the structure shown in FIG. 3 , including: CU-CP, CU-UP and DU.

CU-CP, configured to send first reliability measurement indication information to CU-UP;

CU-CP, used to send the second reliability measurement indication information to the DU;

CU-CP, used to send third reliability measurement indication information to the UE;

CU-UP, for measuring the reliability of CU-UP;

CU-UP, for measuring the reliability of the interface between CU-UP and DU;

DU, used to measure the reliability of DU;

DU, used to send the reliability of the measured DU to the CU-UP;

CU-UP, used to receive the reliability of the UE measured by the UE;

CU-UP, used to calculate the reliability between the access network device and the UE according to the reliability of the CU-UP, the reliability of the interface between the CU-UP and the DU, the reliability of the DU and the reliability of the UE sex;

The CU-UP is used to report the calculated reliability between the access network device and the UE to the core network device.

For the second implementation manner of the foregoing method embodiment, the embodiment of the present application provides an access network device, referring to the structure shown in FIG. 3 , including: CU-CP, CU-UP and DU.

CU-CP, used to send first packet loss rate or packet loss number measurement indication information to CU-UP;

CU-CP, used to send the second packet loss rate or packet loss number measurement indication information to the DU;

CU-CP, used to send the third packet loss rate or packet loss number measurement indication information to the UE;

CU-UP, used to measure the number of lost packets or the packet loss rate of the CU-UP itself;

CU-UP, used to measure the number of lost packets or the packet loss rate of the interface between CU-UP and DU;

DU, used to measure the number of lost packets or the packet loss rate of the DU;

DU, which is used to send the measured packet loss number or packet loss rate of the DU to the CU-UP;

CU-UP, used to receive the number of lost packets or the packet loss rate of the UE measured by the UE;

CU-UP is used to calculate the number of lost packets or the packet loss rate of the CU-UP itself, the number of lost packets or the packet loss rate of the interface between the CU-UP and the DU, the number of lost packets or the packet loss rate of the DU, and the packet loss rate of the UE. The number of lost packets or the packet loss rate, and the reliability between the access network device and the UE is calculated;

An embodiment of the present application provides a UE for implementing the solutions of the foregoing method embodiments. As shown in FIG. 10 , the UE includes: a measurement unit and a transceiver unit.

a measurement unit, configured to measure the reliability of the UE;

A transceiver unit, configured to send the reliability of the UE to the access network device.

Optionally, before the measurement unit measures the reliability of the UE, the transceiver unit is further configured to receive reliability measurement indication information from an access network device, where the reliability measurement indication information indicates to perform reliability measurement. .

Optionally, the transceiver unit is further configured to receive a measurement period from the access network device.

Optionally, the measuring unit measuring the reliability of the UE includes:

a measurement unit, configured to measure the reliability of the UE within the measurement period.

a measurement unit, used to measure the packet loss rate or the number of lost packets of the UE;

A transceiver unit, configured to send the packet loss rate or the number of lost packets of the UE to the access network device.

Optionally, before the measurement unit measures the packet loss rate or the number of packet losses of the UE, the transceiver unit is configured to receive measurement indication information of the packet loss rate or the number of packet losses from the access network equipment, The packet loss rate or number of packet loss measurement indication information instructs to measure the packet loss rate or number of lost packets.

Optionally, the measurement unit measuring the packet loss rate or the number of packet losses of the UE includes:

The measurement unit is configured to measure the reliability of the UE in the measurement period.

The above-mentioned UE may also be implemented by a processor and a transceiver (or a transceiver circuit) or other hardware plus software manner.

The embodiment of the present application provides a core network device, which includes a transceiver unit and a determination unit.

a transceiver unit, configured to receive reliability between the access network device and the user equipment UE from the access network device;

a determining unit, configured to determine the reliability between the access network device and the core network device;

The determining unit is further configured to determine the UE and the UE according to the reliability between the access network device and the UE and the reliability between the access network device and the core network device Reliability between core network devices.

Optionally, the transceiver unit is further configured to send first indication information to the access network device, where the first indication information indicates to perform reliability measurement.

Optionally, the transceiver unit is further configured to send second indication information to the access network device, where the second indication information indicates a reliability measurement period or a reliability reporting period.

The above-mentioned core network device may also be implemented by a processor and a transceiver (or a transceiver circuit) or other hardware plus software.

It should be noted that the numbers such as “first”, “second”, and “third” in the embodiments of the present application are only for distinguishing multiple nouns with the same name in one embodiment, and do not indicate order or The order of device processing. Nouns with different numbers in different embodiments may have the same meaning; nouns with the same number in different embodiments may also have different meanings. The specific meaning should be determined according to the specific program.

References in this application to elements in the singular are intended to mean "one or more" rather than "one and only one" unless specifically stated otherwise. "Some" means one or more. "At least one" means one or more, and "plurality" means two or more. "And/or", which describes the relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, it can indicate that A exists alone, A and B exist at the same time, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the associated objects are an "or" relationship. "At least one item(s) below" or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one item (a) of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple .

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center is by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes an integration of one or more available media. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVD), or semiconductor storage media (eg, Solid State Drive (SSD)), and the like.

Claims

A method for measuring reliability, comprising:

The access network device measures the reliability between the access network device and the user equipment UE;

The access network device sends the reliability between the access network device and the UE to the core network device.
The method of claim 1, further comprising,

Before measuring the reliability between the access network device and the user equipment UE, the access network device receives first indication information from the core network device, where the first indication information indicates to perform reliability measurement .
The method of claim 1 or 2, further comprising,

The access network device receives second indication information from the core network device, where the second indication information indicates a reliability measurement period or a reliability reporting period.
According to the method according to any one of claims 1-3, the access network equipment comprises a centralized unit control plane CU-CP, a centralized unit user plane CU-UP and a distributed unit DU;

The access network device measuring the reliability between the access network device and the user equipment UE includes:

The CU-CP sends the first reliability measurement indication information to the CU-UP;

The CU-CP sends the second reliability measurement indication information to the DU;

The CU-CP sends third reliability measurement indication information to the UE;

CU-UP measures the reliability of CU-UP;

CU-UP measures the reliability of the interface between CU-UP and DU;

DU measures the reliability of DU;

The DU sends the measured reliability of the DU to the CU-UP;

CU-UP receives the reliability of the UE measured by the UE;

The CU-UP calculates the reliability between the access network device and the UE according to the reliability of the CU-UP, the reliability of the interface between the CU-UP and the DU, the reliability of the DU and the reliability of the UE.
According to the method according to any one of claims 1-3, the access network equipment comprises a centralized unit control plane CU-CP, a centralized unit user plane CU-UP and a distributed unit DU;

The access network device measuring the reliability between the access network device and the user equipment UE includes:

The CU-CP sends the first packet loss rate or packet loss number measurement indication information to the CU-UP;

The CU-CP sends the second packet loss rate or packet loss number measurement indication information to the DU;

The CU-CP sends the third packet loss rate or packet loss number measurement indication information to the UE;

CU-UP measures the number of lost packets or the packet loss rate of CU-UP itself;

CU-UP measures the number of lost packets or the packet loss rate of the interface between CU-UP and DU;

The DU measures the number of lost packets or the packet loss rate of the DU;

The DU sends the measured packet loss number or packet loss rate of the DU to the CU-UP;

The CU-UP receives the number of lost packets or the packet loss rate of the UE measured by the UE;

The CU-UP is based on the number of lost packets or the packet loss rate of the CU-UP itself, the number of lost packets or the packet loss rate of the interface between the CU-UP and the DU, the number of lost packets or the packet loss rate of the DU, and the number of lost packets of the UE. or the packet loss rate, and calculate the reliability between the access network device and the UE.
According to the method according to any one of claims 1-3, the access network device measuring the reliability between the access network device and the user equipment UE comprises:

The access network device counts the transmission delay of the data packet between the access network device and the UE, and calculates the reliability between the access network device and the UE according to the transmission delay.
A method for measuring reliability, comprising:

the user equipment UE measures the reliability of the UE;

The UE sends the reliability of the UE to the access network device.
The method of claim 7, further comprising:

Before the UE measures the reliability of the UE, the UE receives reliability measurement indication information from an access network device, where the reliability measurement indication information indicates to perform reliability measurement.
The method according to claim 7 or 8, further comprising, the UE receiving a measurement period from the access network device.
The method according to claim 9, the UE measuring the reliability of the UE comprises:

The UE measures the reliability of the UE within the measurement period.
A method for measuring reliability, comprising:

The user equipment UE measures the packet loss rate or the number of lost packets of the UE;

The UE sends the packet loss rate or the number of packet losses of the UE to the access network device.
The method of claim 11, further comprising:

Before the UE measures the packet loss rate or the number of packet losses of the UE, the UE receives the measurement indication information of the packet loss rate or the number of packet losses from the access network device, and the measurement of the packet loss rate or the number of packet loss The indication information indicates that the packet loss rate or the number of lost packets is measured.
The method according to claim 11 or 12, further comprising, the UE receiving a measurement period from the access network device.
The method according to claim 13, wherein the UE measuring the packet loss rate or the number of packet losses of the UE comprises:

The UE measures the reliability of the UE during the measurement period.
A method for measuring reliability, comprising:

The core network device receives the reliability between the access network device and the user equipment UE from the access network device;

The core network device determines the reliability between the access network device and the core network device;

The core network device determines the UE and the core network according to the reliability between the access network device and the UE and the reliability between the access network device and the core network device reliability between devices.
The method of claim 15, further comprising,

The core network device sends first indication information to the access network device, where the first indication information indicates to perform reliability measurement.
The method of claim 15 or 16, further comprising,

The core network device sends second indication information to the access network device, where the second indication information indicates a reliability measurement period or a reliability reporting period.
An access network device, characterized in that it includes:

a measurement unit, configured to measure the reliability between the access network device and the user equipment UE;

A transceiver unit, configured to send the reliability between the access network device and the UE to the core network device.
The access network device according to claim 18, wherein the transceiver unit is further configured to, before measuring the reliability between the access network device and the UE, receive a first message from the core network device indication information, where the first indication information indicates to perform reliability measurement.
The access network device according to claim 18 or 19, wherein the transceiver unit is further configured to receive second indication information from the core network device, where the second indication information indicates a reliability measurement period or reliability reporting cycle.
The access network device according to any one of claims 18 to 20, wherein the measuring unit is configured to measure the reliability between the access network device and the user equipment UE comprising:

The measuring unit is configured to count the transmission delay of the data packet between the access network device and the UE, and calculate the reliability between the access network device and the UE according to the transmission delay.
An access network device, characterized in that it includes a centralized unit control plane CU-CP, a centralized unit user plane CU-UP and a distributed unit DU, wherein,

The CU-CP is configured to send the first reliability measurement indication information to the CU-UP, send the second reliability measurement indication information to the DU, and send the third reliability measurement indication information to the user equipment UE;

the CU-UP, for measuring the reliability of the CU-UP, and measuring the reliability of the interface between the CU-UP and the DU;

the DU is further used to measure the reliability of the DU, and send the measured reliability of the DU to the CU-UP;

The CU-UP is further configured to receive the reliability of the UE measured by the UE. According to the reliability of the CU-UP, the reliability of the interface between the CU-UP and the DU, the the reliability of the DU and the reliability of the UE, calculate the reliability between the access network device and the UE, and report the calculated reliability between the access network device and the UE to the core network equipment.
An access network device, characterized in that it includes a centralized unit control plane CU-CP, a centralized unit user plane CU-UP and a distributed unit DU, wherein,

The CU-CP is configured to send the first packet loss rate or packet loss number measurement indication information to the CU-UP, send the second packet loss rate or packet loss number measurement indication information to the DU, and send it to the user equipment UE. Send the third packet loss rate or packet loss measurement indication information;

The CU-UP is used to measure the number of lost packets or the packet loss rate of the CU-UP, and to measure the number of lost packets or the packet loss rate of the interface between the CU-UP and the DU;

The DU is used to measure the number of lost packets or the rate of packet loss of the DU, and send the number of lost packets or the rate of packet loss of the DU obtained by measurement to the CU-UP;

The CU-UP is used to receive the number of lost packets or the packet loss rate of the UE measured by the UE. According to the number of lost packets or the packet loss rate of the CU-UP, the CU-UP and the The number of lost packets or the packet loss rate of the interface between the DUs, the number of lost packets or the packet loss rate of the DU and the number of lost packets or the packet loss rate of the UE, calculate the difference between the access network device and the UE. The reliability between the access network equipment and the UE is reported to the core network equipment.
A user equipment UE, comprising: a measurement unit and a transceiver unit, wherein,

the measuring unit, configured to measure the reliability of the UE;

The transceiver unit is configured to send the reliability of the UE to the access network device.
The UE according to claim 24, wherein the transceiver unit is further configured to receive reliability measurement indication information from the access network device before the measurement unit measures the reliability of the UE, the reliability The reliability measurement indication information indicates to perform reliability measurement.
The UE according to claim 24 or 25, wherein the transceiver unit is further configured to receive a measurement period from the access network device.
The UE according to claim 26, wherein the measuring unit is configured to measure the reliability of the UE comprising:

The measurement unit is configured to measure the reliability of the UE within the measurement period.
A user equipment UE, comprising: a measurement unit and a transceiver unit, wherein,

the measuring unit, used to measure the packet loss rate or the number of lost packets of the UE;

The transceiver unit is configured to send the packet loss rate or the number of packet losses of the UE to the access network device.
The UE according to claim 28, wherein the transceiver unit is further configured to receive a packet loss rate or a packet loss rate from the access network device before the measurement unit measures the packet loss rate or the number of packet losses of the UE. The packet loss number measurement indication information, the packet loss rate or the packet loss number measurement indication information indicates that the packet loss rate or the packet loss number measurement is performed.
According to the UE according to claim 28 or 29, the transceiver unit is further configured to receive a measurement period from the access network device.
The UE according to claim 30, wherein the measurement unit is configured to measure the packet loss rate or the number of packet losses of the UE comprising:

The measurement unit is configured to measure the reliability of the UE in the measurement period.
A core network device is characterized by comprising a transceiver unit and a determination unit, wherein,

the transceiver unit, configured to receive reliability between the access network device and the user equipment UE from the access network device;

The determining unit is configured to determine the reliability between the access network device and the core network device, according to the reliability between the access network device and the UE and the relationship between the access network device and the core network device. The reliability between the core network equipment determines the reliability between the UE and the core network equipment.
The core network device according to claim 32, wherein the transceiver unit is further configured to send first indication information to the access network device, wherein the first indication information indicates to perform reliability measurement.
The core network device according to claim 32 or 33, wherein the transceiver unit is further configured to send second indication information to the access network device, where the second indication information indicates a reliability measurement period or a reliability reporting period .