WO2021036441A1 - Method and apparatus for collecting statistics about service traffic - Google Patents

Abstract

The present application relates to the field of communications. Disclosed are a method and apparatus for collecting statistics about service traffic, capable of improving precision in traffic querying and reporting between a session management function (SMF) and a user plane function (UPF), and reducing signaling overheads. The method comprises: a first UPF receives a session establishment request sent by an SMF, the session establishment request comprising at least one usage reporting rule (URR) cell corresponding to a session flow, and each URR cell comprising a traffic threshold; the first UPF receives a first downlink data packet, the first downlink data packet comprising the identifier of the session flow, a first URR bitmap table, and accumulated traffic of the session flow, and the URR bitmap table being used for indicating the URR cell involved in the accumulated traffic; the first UPF collects statistics about newly added traffic of the URR cell indicated by the URR bitmap table according to the first downlink data packet, and if the newly added traffic reaches the traffic threshold corresponding to the URR cell indicated by the URR bitmap table, the first UPF sends a URR notification to the SMF. Embodiments of the present application are used for traffic reporting among a plurality of UPFs.

Description

Method and device for counting business flow

This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office on August 30, 2019, the application number is 201910818906.7, and the application name is "a method and device for counting business traffic", the entire content of which is incorporated by reference In this application.

Technical field

This application relates to the field of communications, and in particular to a method and device for counting business traffic.

Background technique

The 5th generation mobile networks (5G) network is committed to meeting the huge challenges of future diversification and differentiated services. It not only needs to continue to face the challenges brought by mobile Internet services, but also needs to meet the diversification of vertical industries Business requirements, such as ultra-high speed, ultra-low latency, and ultra-high traffic. Therefore, in the 5G network architecture, the uplink classifier (UL CL) or branching point (BP) function is defined to realize the flexible deployment of the application in the network, and the application and the network cooperate to select the optimal data path , To achieve the lowest transmission cost and the highest efficiency to provide bandwidth to reduce business delay.

In specific implementation, the 5G network allows a session to have multiple user plane functions (UPF) and multiple session anchors at the same time. The 5G network can control different service flows through UL CL/BP to select different session anchor, so as to meet the needs of business diversity. When a session has multiple UPF scenarios, the charging function (CHF) can give all UPF traffic quota management. At the same time, the session management function (SMF) is required for secondary management of quotas, so as to Multiple UPFs are coordinated and allocated. When the SMF determines that the usage of the quota for this session in the multiple UPFs reaches the threshold, the traffic is reported to the CHF. Among them, when SMF performs secondary management of quotas, it needs to coordinate and allocate among multiple UPFs. There will be multiple queries and reports between SMF and UPF. This multiple query and report method makes it difficult to accurately control the quota threshold. In other words, the traffic finally aggregated by SMF may exceed the threshold before being reported to CHF, making traffic statistics and reporting inaccurate. Moreover, when two UPFs report traffic at different timings, if the SMF actively queries the UPF for traffic, time loss will occur. Especially in the scenario where the quota is exhausted, the signaling interaction between the SMF and the UPF is increased.

Summary of the invention

The embodiments of the present application provide a method and device for counting service traffic, which can improve the accuracy of querying and reporting traffic between SMF and UPF, and reduce signaling overhead.

In a first aspect, a method for counting service traffic is provided, including: a first user plane function receives a session establishment request sent by a session management function, the session establishment request includes at least one URR cell corresponding to the session flow, and each URR The cell includes the flow threshold; the first user plane function receives the first downlink data packet, and the first downlink data packet includes the identifier of the session flow, the first URR bit map, and the cumulative flow of the session flow; the URR bit map is used to indicate the accumulation The URR cell involved in the flow; the first user plane function counts the newly added flow of the URR cell indicated by the URR bit chart according to the first downlink data packet. If the newly added flow reaches the flow corresponding to the URR cell indicated by the URR bit chart Threshold, the first user plane function sends a URR notification to the session management function, and the URR notification is used to apply for a new flow threshold for URR cells that reach the flow threshold. Therefore, in the embodiment of the present application, the URR bit map can be carried in the downlink data packet sent by the session anchor (PSA) to the first user plane function to indicate the URR cell or service for which the traffic needs to be counted, which can be convenient for the first user The plane function performs traffic statistics based on the URR bit chart to determine whether to send a URR notification to the SMF to apply for a new traffic threshold. In this way, by carrying the flow URR bit map in the downlink data packet and collecting it through the first user plane function, the power consumption caused by multiple signaling interactions between the session anchor and the SMF can be reduced, and the traffic Statistics are accurate in real time.

In a possible design, the first user plane function is the uplink classifier UL CL or branch point BP; the first user plane function receiving the first downlink data packet includes: the first user plane function receiving the second user plane function sending The first downlink data packet, the second user plane function is the protocol data unit PDU session anchor PSA.

In a possible design, each URR cell also includes a URR bitmap subscript; the URR bitmap includes at least one bit value, the bit value corresponds to the URR bitmap subscript, and the bit value is the first indicator value or the second Indicating value, the first indicating value is used to indicate that the URR cell corresponding to the URR bitmap subscript requires cumulative flow, and the second indicating value is used to indicate that the URR cell corresponding to the URR bitmap subscript does not require cumulative flow. For example, the first indicator value is 1, and the second indicator value is 0. Since the bits in the URR bitmap have two bit values, UL CL/BP can determine the URR bitmap subscript corresponding to the bit according to the first indicator value, and then can calculate the new URR cell corresponding to the URR bitmap subscript flow.

In a possible design, each URR cell also includes a URR identifier; in each URR cell, a URR identifies a URR bitmap subscript mapping. Alternatively, this application may not use the URR bitmap subscript, and reuse the URR identifier to participate in traffic statistics. The use of URR bitmap subscripts takes into account that the types of services that users subscribe to are less than URR identifiers, and the use of URR bitmap subscripts occupies smaller bits.

In a possible design, the first user plane function according to the first downlink data packet statistics indicates the newly added flow of the URR cell indicated by the first bit chart includes: the first user plane function obtains the first downlink data packet carried in the first downlink data packet The difference between the accumulated flow of and the accumulated flow carried in the second downlink data packet received last time, and the difference is the newly added flow corresponding to the URR cell indicated by the URR bit chart. This method of carrying accumulated traffic in downlink data packets to obtain new traffic can avoid the signaling overhead caused by multiple signaling interactions for traffic statistics.

In a possible design, the first downlink data packet also includes a start marker of the session flow; the start marker is used to indicate that the first downlink data packet is the first downlink data packet of the session flow; or, the first downlink data packet The line data packet also includes an end mark, which is used to indicate that the first downlink data packet is the last downlink data packet of the session flow; the method further includes: if the first downlink data packet includes the start mark, then the first user The plane function records the identifier of the session flow; if the first downlink data packet includes an end marker, the first user plane function deletes the identifier of the session flow. In this way, by carrying the start mark and the end mark, the first user plane function can record and delete relevant parameters of the session stream in time.

In a second aspect, a method for counting service traffic is provided, including: a session management function sends a session establishment request to a first user plane function, the session establishment request includes at least one usage reporting rule URR cell corresponding to the session flow, each The URR cell includes the flow threshold; the session management function receives the URR notification sent by the first user plane function, and the URR notification is used to apply for a new flow threshold for the URR cell in the session flow that reaches the flow threshold; the session management function sends the policy control function PCF Send URR notifications to obtain new traffic thresholds. The beneficial effects of the second aspect can be referred to the first aspect, which will not be repeated here.

In a possible design, the first user plane function is the uplink classifier UL CL or branch point BP; the session establishment request is used to instruct the first user plane function to determine when the newly added flow of URR cells reaches the corresponding flow threshold , To send URR notification to the session management function.

In a possible design, each URR cell also includes a URR bitmap subscript; the URR bitmap subscript corresponds to at least one bit included in the URR bitmap, and the bit value corresponding to the bit is the first indicator value or the second Indicating value, the first indicating value is used to indicate that the URR cell corresponding to the URR bitmap subscript requires cumulative flow, and the second indicating value is used to indicate that the URR cell corresponding to the URR bitmap subscript does not require cumulative flow.

In a possible design, each URR cell also includes a URR identifier; in each URR cell, a URR identifier is mapped to a URR bitmap subscript.

In a possible design, the method further includes: the session management function receives a URR response sent by the PCF, the URR response includes a new traffic threshold; the session management function sends a URR update notification to the first user plane function, and the URR update notification includes the new Traffic threshold.

In a possible design, the method further includes: when the session management function determines that the first user plane function is deleted, if the session management function needs to update the URR information element, the session management function sends a session update request to the second user plane function, The second user plane function is a protocol data unit PDU session anchor PSA associated with the first user plane function, and the session update request is used to instruct the second user plane function to send a URR notification to the session management function. That is, when the first user plane function (UL CL/BP) is deleted, the second user plane function (PSA) can directly report the traffic to the session management function (SMF).

In a third aspect, a user plane function is provided. The user plane function is a first user plane function, and the first user plane function includes: a receiving module for receiving a session establishment request sent by a session management function, and the session establishment request includes a session flow correspondence At least one of the URR cells using the reporting rule, each URR cell includes a flow threshold; the receiving module is also used to receive the first downlink data packet, the first downlink data packet includes the session flow identifier, the first URR bit map And the cumulative flow of the session flow; the URR bit chart is used to indicate the URR cells involved in the cumulative flow; the processing module is used to count the newly added flow of URR cells indicated by the URR bit chart according to the first downlink data packet; the sending module It is also used to send a URR notification to the session management function if the newly added flow reaches the flow threshold corresponding to the URR cell indicated by the URR bit chart. The URR notification is used to apply for a new flow threshold for the URR cell that reaches the flow threshold.

In a possible design, the first user plane function is the uplink classifier UL CL or branch point BP; the receiving module is used to: receive the first downlink data packet sent by the second user plane function, and the second user plane function is Protocol data unit PDU session anchor PSA.

In a possible design, each URR cell also includes a URR bitmap subscript; the URR bitmap includes at least one bit value, the bit value corresponds to the URR bitmap subscript, and the bit value is the first indicator value or the second Indicating value, the first indicating value is used to indicate that the URR cell corresponding to the URR bitmap subscript requires cumulative flow, and the second indicating value is used to indicate that the URR cell corresponding to the URR bitmap subscript does not require cumulative flow.

In a possible design, each URR cell also includes a URR identifier; in each URR cell, a URR identifies a URR bitmap subscript mapping.

In a possible design, the processing module is used to obtain the difference between the accumulated flow carried in the first downlink data packet and the accumulated flow carried in the second downlink data packet received previously, the difference being URR bits The newly added traffic corresponding to the URR cell indicated in the chart.

In a possible design, the first downlink data packet also includes a start marker of the session flow; the start marker is used to indicate that the first downlink data packet is the first downlink data packet of the session flow; or, the first downlink data packet The line data packet also includes an end mark, which is used to indicate that the first downlink data packet is the last downlink data packet of the session flow; the processing module is also used to: if the first downlink data packet includes the start mark, record the session The identifier of the flow; if the first downlink data packet includes an end marker, the identifier of the flow of the second session is deleted.

In a fourth aspect, a session management function is provided, including: a sending module for sending a session establishment request to a first user plane function, the session establishment request includes at least one usage reporting rule URR cell corresponding to the session flow, each The URR cell includes a flow threshold; the receiving module is used to receive the URR notification sent by the first user plane function, and the URR notification is used to apply for a new flow threshold for the URR cell that reaches the flow threshold in the session flow; the sending module is used to send The policy control function PCF sends URR notifications to obtain new traffic thresholds.

In a possible design, the first user plane function is the uplink classifier UL CL or branch point BP; the session establishment request is used to instruct the first user plane function to determine when the newly added flow of URR cells reaches the corresponding flow threshold , To send URR notification to the session management function.

In a possible design, each URR cell also includes a URR bitmap subscript; the URR bitmap subscript corresponds to at least one bit included in the URR bitmap, and the bit value corresponding to the bit is the first indicator value or the second Indicating value, the first indicating value is used to indicate that the URR cell corresponding to the URR bitmap subscript requires cumulative flow, and the second indicating value is used to indicate that the URR cell corresponding to the URR bitmap subscript does not require cumulative flow.

In a possible design, each URR cell also includes a URR identifier; in each URR cell, a URR identifier is mapped to a URR bitmap subscript.

In a possible design, the receiving module is also used to receive a URR response sent by the PCF, the URR response includes a new traffic threshold; the sending module is also used to send a URR update notification to the first user plane function, the URR update notification includes The new traffic threshold.

In a possible design, the sending module is also used for: when the session management function determines that the first user plane function is deleted, if the session management function needs to update the URR information element, it sends a session update request to the second user plane function. The second user plane function is a protocol data unit PDU session anchor PSA associated with the first user plane function, and the session update request is used to instruct the second user plane function to send a URR notification to the session management function.

In another aspect, an embodiment of the present application provides a computer-readable storage medium, including computer instructions, which when the computer instructions run on an electronic device, cause the electronic device to execute the program designed in the first aspect and/or the second aspect. .

In another aspect, the embodiments of the present application provide a computer program product, which when the computer program product runs on an electronic device, causes the electronic device to execute the method of the first aspect and/or the second aspect described above.

Description of the drawings

Figure 1 is a signaling interaction diagram for coordinating and distributing traffic among multiple UPFs;

FIG. 2 is a schematic diagram of a network architecture provided by an embodiment of this application;

FIG. 3 is a schematic diagram of a network architecture provided by an embodiment of this application;

4 is a schematic flow chart of a method for counting service traffic provided by an embodiment of this application;

FIG. 5 is a schematic flowchart of a method for counting service traffic provided by an embodiment of this application;

Fig. 6 is a schematic flow chart of a method for counting service traffic when UL CL/BP is deleted according to an embodiment of the application;

FIG. 7 is a schematic structural diagram of an electronic device provided by an embodiment of the application;

FIG. 8 is a schematic structural diagram of an electronic device provided by an embodiment of the application;

FIG. 9 is a schematic structural diagram of an electronic device provided by an embodiment of this application;

FIG. 10 is a schematic structural diagram of an electronic device provided by an embodiment of this application;

FIG. 11 is a schematic structural diagram of an electronic device provided by an embodiment of this application;

FIG. 12 is a schematic structural diagram of an electronic device provided by an embodiment of this application.

detailed description

The embodiments of the present application can be applied to a 5G network architecture. In a scenario where a session has multiple UPFs, how to count and report service traffic in real time and accurately.

When a session has multiple UPF scenarios, if CHF manages session quotas uniformly without distinguishing between UPFs, SMF needs to perform secondary management on quotas for each UPF. The process of coordinated allocation among multiple UPFs can be shown in Figure 1. Shown.

1) SMF sends a session management policy association (Npcf_smpolicyControl_Create) message to the policy control function (PCF) to the PCF, determines that policy control and charging (PCC) authorization is required, and requests to establish session management with the PCF ( session management, SM) policy association;

2) Establish a charging context between SMF and CHF (Npcf_ConvergedCharging_Create);

3) SMF establishes PDU session anchor point 1 (PDU (Protocol Data Unit, protocol data unit) session anchor, PSA); then SMF and PSA1 conduct business exchanges;

4) SMF establishes PSA2;

5) PSA1 uses the Packet Forwarding Control Protocol (PFCP) session notification (PFCP session report) to report to the SMF that the traffic has reached the threshold;

6) In order to ensure the reasonable allocation of quotas between PSA1 and PSA2, SMF sends a PFCP session modification Request message to PSA2, requesting PSA2 to report traffic usage immediately;

7) According to the traffic reported by PSA1 and PSA2, SMF re-allocates traffic quotas to PSA1 and PSA2 based on the remaining quota and other information, and sends the updated traffic threshold to PSA1;

8) The SMF delivers the updated traffic threshold to PSA2.

The above steps 5-8 can be repeated until the threshold/quota issued by PCF/CHF is reached or exceeded.

It can be seen that in order to ensure the reasonable allocation of quotas between PSAs, there will be multiple queries and reports between SMF and PSA, and the final aggregated traffic may exceed the threshold, making it difficult to accurately control the quota threshold.

To solve this problem, the design idea of this application is to use the convergence point characteristics of UL CL/BP to report URR. The identification of URR is completed by PSA and the URR list corresponding to the session flow is carried in the downlink packet, so as to achieve the traffic control. The purpose of accurate statistics and timely reporting.

The following first describes the network architecture of this application.

The network architecture of this application may be as shown in Figure 2, including terminal equipment, access network (AN), user plane functions, mobility management network elements, session management functions, policy control functions, charging functions, and data networks (data network, DN), etc.

Among them, referring to FIG. 3, the terminal equipment may be user equipment (UE), access terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal, mobile equipment, UE terminal, terminal, wireless Communication equipment, UE agent or UE device, etc. The access terminal can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminals in 5G networks or terminals in evolved public land mobile network (PLMN) networks, etc.

The access network AN may include equipment capable of communicating with terminal equipment. For example, the access network includes a base station, and the base station may be a relay station or an access point. The base station can be a base transceiver station (BTS) in the global system for mobile communication (GSM) or code division multiple access (CDMA) network, or it can be a broadband code division The NB (NodeB) in wideband code division multiple access (WCDMA) may also be the eNB or eNodeB (evolutional NodeB) in LTE. The base station may also be a wireless controller in a cloud radio access network (cloud radio access network, CRAN) scenario. The base station can also be a network device in a 5G network or an evolved PLMN network; it can also be a wearable device or a vehicle-mounted device.

In the 5G network architecture, the user plane function can be UPF, which can be used for: intra-RAT (radio access technology, RAT)/inter-RAT mobility anchor (when applicable); external PDU and data network interconnection Session point; packet routing and forwarding (for example, supporting uplink classifiers to route traffic to an instance of the data network, supporting branch points to support multi-homed PDU sessions); packet inspection (for example, based on service data flow templates) Application process detection and flow description of optional packets received from SMF (packet flow description, PFD); user plane part of the policy rule implementation, such as gating, redirection, traffic diversion); lawful interception; traffic usage report; user plane Quality of Service (QoS) processing, such as UL CL/DL rate implementation, reflection QoS marking in DL; uplink traffic verification service data flow (service data flow, SDF to QoS traffic mapping; uplink and downlink Transmission-level packet marking in the link; downlink packet buffering and downlink data notification triggering; sending and forwarding one or more "end marks" to the source next generation radio access network (NG-RAN) Nodes and so on.

In the 5G network architecture, mobility management network elements can be access and mobility management functions (AMF), which can be used to: terminate the non-access-stratum (NAS) (N1), NAS encryption and integrity protection; registration management; connection management; reachability management; liquidity management; lawful interception (applicable to the interface of AMF events and LI system; provides transmission for SM messages between UE and SMF; used for routing Transparent proxy of SM messages; access identity verification; access authorization; provide message transmission between UE and SMF; position service management of supervisory service; provide between UE and location management function (location management function, LMF) as well as between RAN and Location service messages between LMFs provide transmission and so on.

In the 5G network architecture, the session management function can be SMF, which can be used for: session management; UE Internet Protocol (IP) address allocation and management; selection and control of the UP function; configuration of the UPF transmission direction and routing of the transmission to Correct destination; part of controlling policy execution and QoS; downlink data notification; configuring UPF flow control to route traffic to the correct destination; terminating the interface to the policy control function, etc.

In the 5G network architecture, the policy control function can be PCF, and its functions can include: support a unified policy framework to manage network behavior; provide policy rules for control plane functions; access and unified data repository (UDR) User information related to strategic decisions.

In the 5G network architecture, the charging function can be CHF, which can be used for converged online and offline charging. The CHF receives the charging information reported by the charging trigger function (charging trigger function, CTF) (SMF can be used as the CTF), generates a bill or issues a quota to the CTF, and provides a charging function to the UE.

The data network DN may include various devices, such as routers, servers, and so on.

In the embodiment of the present application, the use of SMF and UPF in the foregoing network architecture can reduce signaling interaction between SMF and UPF. In the embodiment of this application, UPF can be classified as UL CL or branch point BP. UL CL can be an uplink traffic classifier that supports the offload of upstream traffic. BP can be a branch point of a session, which can support downstream traffic. merge. UPF can also be PSA, that is, PDU session anchor. Figure 2 shows that there are two PSAs, PSA1 and PSA2.

The methods in the following embodiments can all be implemented in the aforementioned network architecture. In the following embodiments, the foregoing network architecture is taken as an example to describe the method of the embodiment of the present application.

The embodiment of the present application provides a method for counting service traffic, as shown in FIG. 4, including:

301. The session management function sends a session establishment request to a first user plane function. The session establishment request includes at least one URR cell of a usage reporting rule, and each URR cell includes a flow threshold.

In the embodiment of the present application, the session management function may be SMF; the user plane function may be UPF, and UPF may be used as UL CL or BP, or PSA. When SMF sends a session establishment request to UPF, the UPF is UC CL/BP. That is, the first user plane function is UC CL/BP, which is denoted as the first UPF.

In the embodiment of the present application, the flow threshold carried in the URR cell may indicate that the first UPF reports to the SMF when the statistical flow reaches the flow threshold.

302. The first user plane function receives a session establishment request sent by the session management function.

303. The first user plane function receives the first downlink data packet. The first downlink data packet includes the identifier of the session flow, the first URR bit map, and the cumulative traffic of the session flow; the URR bit map is used to indicate the cumulative traffic involved URR cell.

In the embodiment of the present application, the first downlink data packet may be sent by the second user plane function (second UPF) to the first UPF (UL CL/BP), and the second UPF is PSA.

In the embodiment of this application, the URR cell can correspond to different service types, and the bit in the URR bit table can correspond to one URR cell. When the downlink data packet received by the first UPF carries the URR bit table , The value of the bit in the bitmap can indicate which URR cell corresponds to the business that needs to count traffic. The mapping relationship between the bit and URR in the bitmap is issued by the SMF, so that the cumulative traffic in the downlink data packet can be adjusted Perform statistics on the services that need to be counted as indicated by the URR bit chart.

304. The first user plane function counts the newly added traffic of URR cells indicated by the URR bit chart according to the first downlink data packet.

The first UPF can obtain the difference between the accumulated flow carried in the first downlink data packet and the accumulated flow carried in the second downlink data packet received last time. The difference is the URR cell indicated by the URR bit chart. Of new traffic.

305. If the new traffic reaches the traffic threshold corresponding to the URR cell indicated by the URR bit chart, the first user plane function sends a URR notification to the session management function, and the URR notification is used to apply for new traffic for the URR cell that reaches the traffic threshold. Threshold.

306. The session management function receives the URR notification sent by the first user plane function.

307. The session management function sends a URR notification to the policy control function PCF and the charging function CHF to obtain a new flow threshold.

Therefore, in the embodiment of the present application, the URR bit chart can be carried in the downlink data packet sent by the PSA to UL CL/BP to indicate the URR or service that needs to count traffic, which can facilitate UL CL/BP to perform traffic statistics based on the URR bit chart. To determine whether to send a URR notification to SMF to apply for a new traffic threshold. In this way, by carrying the flow URR bit chart in the downlink data packet and collecting it through UL CL/BP, the power consumption caused by the signaling interaction between PSA and SMF can be reduced, and the traffic statistics can be real-time and accurate.

The following uses the network framework shown in FIG. 3 as an example to further illustrate the embodiments of the present application.

Corresponding to Figure 3, the session management function is SMF, the policy control function is PCF, the charging function is CHF, the first user plane function is UL CL/BP, the second user plane function is PSA1, and the third user plane function is PSA2, as an example, an embodiment of the present application provides a method for counting service traffic, as shown in FIG. 5, including:

401. The SMF calls the PCF to obtain the PCC policy.

The PCC strategy is used for policy control and stream charging such as QoS for packet network service data transmission, and aims to provide users with differentiated services.

402. SMF calls CHF to start charging.

After the user establishes a session connection, SMF needs to perform traffic accounting services for the user, and SMF can call CHF to start traffic accounting for the session according to the PCC policy.

403. The SMF combines information such as the PCC policy issued by the PCF, the charging policy of the CHF, and the locally configured policy to generate URR information elements, and establishes the mapping relationship between the URR ID to the URR bitmap subscript and the URR bitmap.

There are two types of URR cells, one is the charging type, which is used when the SMF reports to the CHF for charging; the other is the policy type, which is used when the SMF reports the policy to the PCF. In each type, URR cells can be divided into session-level URR and service-level URR. Taking the strategy URR cell as an example, the session-level URR can be understood as a session corresponding to a URR cell, and all flows in the session are associated with the URR cell; for its service-level URR, the service-level URR is under the PCF The strategy issued by the PCF is associated with the URR cell, and multiple strategies can be associated with the same URR cell. Taking the charging URR cell as an example, the service-level URR corresponds to the charging rate group/service ID (RG/SID), the policy issued by the PCF is associated with the RG/SID, and the CHF is for the RG /SID allocates quota, SMF can create URR cell corresponding to RG/SID.

In the embodiments of this application, the service-level URR is taken as an example for description. Each URR cell corresponds to a service. Each URR cell includes a URR ID (URR identify, URR ID), and each URR cell also includes URR. Bitmap index (URR index).

It should be noted that if the operator has fewer services and the SMF does not have a URR configured locally, the URR is dynamically generated, then the URR bitmap subscript can reuse the dynamically generated URR ID for traffic statistics; if the SMF is local If the URR is configured, the bit size occupied by the URR ID is relatively large. The embodiment of the present application uses the URR bitmap subscript to perform traffic statistics, that is, converts the URR ID into a number in the session, so that the number range is reduced.

In the case that the URR information element includes the URR bitmap subscript, this application extends the Creat URR IE (information element) of the N4 interface between the SMF and the UPF, and expands the URR Index field, for example, Creat URR The expanded format of IE (URR cell) can be as shown in Table 1.

Table 1

In Table 1, This IE shall uniquely identify the URR among all the URRs configured for this PFCP session. It is expressed that the IE should be uniquely identified as the URR in all URRs configured for the PFCP session.

It can be known from Table 1 that a URR cell contains a URR ID and a URR bitmap subscript, that is, a URR ID maps a URR bitmap subscript.

Assuming that the URR Index ranges from 0 to 127, which occupies 8 bits, a session (session) can have up to 128 URR Indexes. The specific format of the URR Index field can be shown in Table 2.

Table 2

In Table 2, URR Index can be represented by 8 bits, its type value is 50000, and its length can be n. For example, URR Index can be expressed as 10000000, 01000000, and so on.

For the convenience of description, this application describes URR ID and URR bitmap subscripts in decimal 1, 2, 3... etc.

Assuming that the operator has 100 types of services, each user can sign up to 32 types of services. If the URR ID number is 1 to 100, the URR Index number is 0 to 31, and the session of user 1 uses URR IDs of 10, 13, and 57. And the service of 89, then the mapping relationship between URR ID and URR Index established by SMF can be <10, 0>, <13, 1>, <57, 2>, <89, 3>; user 2’s session uses URR For services with IDs 11, 3, 5, and 8, then the mapping relationship between URR ID and URR Index established by SMF can be <11, 0>, <3, 1>, <5, 2>, <8, 3>.

While the mapping relationship is established, for a session, the URR bitmap (bitmap) corresponding to multiple URR bitmap subscripts includes at least one bit value. For example, when a user subscribes to 32 types of services, there can be 32 bits to indicate Bitmap subscript. Taking user 2 as an example, the 0th bit in the bitmap actually represents URR ID 11, the 1st bit actually represents URR ID3, and so on. In the URR bit map, the initial bit value of each URR bit map subscript can be 0.

404. The SMF sends a first session establishment request to the PSA1. The first session establishment request includes at least one URR cell, and each URR cell includes a URR bitmap subscript.

The SMF may send the first session establishment request to the PSA1 through the N4 interface. In this embodiment of the application, the session establishment request may be a PFCP session establishment request.

When the user initiates a session, if the user's current session involves multiple services, the first session establishment request includes URR cells corresponding to these multiple services and is sent to PSA1. The format of the URR cell can be seen in Table 1.

A session may have multiple session anchor points. In this embodiment, the established session anchor points are PSA1 and PSA2 as an example.

405. PSA1 sends a first session establishment response to the SMF.

PSA1 may send the first session establishment response to the SMF through the N4 interface.

In this embodiment of the application, the session establishment response may be PFCP session establishment response.

406. The SMF sends a second session establishment request to PSA2. The second session establishment request includes at least one URR cell of a usage reporting rule, and each URR cell includes a URR bitmap subscript.

407. PSA2 sends a second session establishment response to the SMF.

408. The SMF sends a third session establishment request to the UL CL/BP. The third session establishment request includes at least one URR cell corresponding to the session flow, and each URR cell includes a URR bitmap subscript and a flow threshold.

The SMF can send the third session establishment request to the UL CL/BP through the N4 interface.

When a user initiates a session, if the session flow of the user's current session involves multiple services, the URR cells corresponding to these multiple services must be issued to UL CL/BP. UL CL/BP can learn the mapping relationship between URR ID and URR Index according to the URR ID and URR Index carried in multiple URR cells, and then in step 411, according to the mapping relationship, each URR cell carries Traffic thresholds and URR bit graphs collect statistics on business traffic. The format of the URR cell can be seen in Table 1.

409. The UL CL/BP sends a third session establishment response to the SMF.

410. PSA1 sends the first downlink data packet to UL CL/BP. The first downlink data packet includes the identifier of the session flow, the URR bit map, and the cumulative flow of the session flow; the URR bit map is used to indicate the URR involved in the cumulative flow Letter yuan.

Taking FIG. 2 as an example, when the session anchor PSA1 corresponding to the session receives the first downlink data packet sent by the data network DN, it can be sent to the terminal device through the session anchor PSA1 and the access network AN. The first downlink data packet received by PSA1 carries the identifier of the session flow (LableId), the URR bit map, and the cumulative flow of the session flow (volume), and PSA1 can send the first data to UL CL/BP through the N9 interface Downlink data packet. Specifically, the downlink PDU session information (download PDU session information) (PDU type 0) in the first downlink data packet can be extended to carry the identifier of the session flow, the URR bit map, and the cumulative flow. The specific format can be as shown in Table 3. Shown.

table 3

In Table 3, URR BITMAP LEN represents the length of bits occupied by the URR bitmap; LabelId represents the session flow ID, and the URR bitmap corresponding to a flow is fixed; URR BITMAP represents the URR bitmap; Volume represents the flow of the stream identified by LabelId Cumulative traffic; STA represents the start mark of the flow identified by the Label Id; STO represents the end mark of the flow identified by the Label Id.

Wherein, the URR bit table includes at least one bit value, the bit value corresponds to the URR bitmap subscript, the bit value is the first indicator value or the second indicator value, and the first indicator value is used to indicate the URR signal corresponding to the URR bitmap subscript. The second indicator value is used to indicate that the URR cell corresponding to the subscript of the URR bitmap does not need to accumulate the flow. For example, the first indicator value is 1, and the second indicator value is 0.

STA is used to indicate that the first downlink data packet is the first downlink data packet of the session flow; or, STO is used to indicate that the first downlink data packet is the last downlink data packet of the session flow. If the first downlink data packet includes STA, UL CL/BP records the identifier of the session flow, LableId; if the first downlink data packet includes STO, UL CL/BP deletes the identifier of the session flow.

Similarly, the format of the downlink data packet received by PSA2 is similar to that of the first downlink data packet received by PSA1.

411. The UL CL/BP counts the newly added traffic of URR cells indicated by the URR bit chart according to the first downlink data packet.

Since the bits in the URR bitmap have two bit values, UL CL/BP can determine the URR bitmap subscript corresponding to the bit according to the first indicator value, and then can calculate the new URR cell corresponding to the URR bitmap subscript flow.

In some embodiments, UL CL/BP can obtain the difference between the accumulated flow carried in the first downlink data packet and the accumulated flow carried in the second downlink data packet received last time. The difference is the first graph The newly added traffic corresponding to the indicated URR cell. For example, the bit value of the URR bitmap is 01011000 (bit numbering from the left end to the right end), the value of the 0, 2, 5, 6, and 7 bits is 0, and the corresponding URR bitmap subscripts are 0, 2, 5, 6 and 7, then URR cells corresponding to the subscripts of the URR bitmap of 0, 2, 5, 6, and 7 do not need to count the new traffic; the value of the first 1, 3, and 4 bits is 1, the corresponding URR bitmap The subscripts are 1, 3, and 4, then the URR cells corresponding to the subscripts 1, 3, and 4 of the URR bitmap need to count the new traffic. Among them, for the service-level URR, when the URR cell needs to count the traffic, it can also be considered that the traffic corresponding to the URR cell needs to be counted.

412. If the newly added flow reaches the flow threshold corresponding to the URR cell indicated by the URR bit chart, UL CL/BP sends a URR notification to the SMF. The URR notification is used to apply for a new flow threshold for the URR cell that reaches the flow threshold.

Exemplarily, when the flow threshold corresponding to the URR cell is 100, if the new flow reaches or exceeds the flow threshold 100 corresponding to the URR cell, UL CL/BP can notify the SMF that the flow allocated by the URR cell has been allocated. After use, instruct SMF to apply for a new traffic threshold from PCF. For example, if the new traffic threshold is 200, then if UL CL/BP continues to count the new traffic and reaches 200, you can send URR notification to SMF again to apply for new traffic. Threshold.

413. The SMF sends a URR notification to the PCF to obtain a new flow threshold.

Correspondingly, the SMF receives the URR response sent by the PCF, and the URR response includes the new flow threshold.

In some embodiments, the SMF sends a URR update notification to the UL CL/BP, and the URR update notification includes the new traffic threshold.

Therefore, in the above embodiment, PSA can report traffic to UL CL/BP along with data packets, UL CL/BP performs traffic statistics, and reports traffic to SMF. This process of reporting traffic along with data packets can guarantee the traffic The accuracy of reporting can also avoid the problem of high signaling overhead caused by multiple signaling interactions between SMF and UPF.

In the above embodiment, UL CL/BP realizes the functions of traffic accumulation and URR reporting. In some embodiments, as the user moves, the UL CL in the above embodiments may be deleted. After the UL CL is deleted, the traffic report of PSA1/PSA2 will no longer be able to report traffic to the SMF through the UL CL. At this time, the PSA You can report traffic directly to SMF.

Exemplarily, take Figure 3 as the network architecture, as shown in Figure 6:

501. The UE establishes a PDU session. The session includes multiple sessions such as UL CL/BP, PSA1, and PSA2. The UL CL/BP implements traffic statistics and traffic reporting (see the corresponding embodiment in FIG. 4).

502. When the SMF informs the UE to stop using the IPv6 prefix corresponding to PSA1 through an Internet Protocol Version 6 routing advertisement ((Internet Protocol Version 6, IPv6) Router Advertisement), the UE can start to use the IPv6 prefix corresponding to PSA2 for all service traffic.

503. The SMF interacts with the (R)AN to update the (R)AN tunnel information, so that the uplink traffic is sent from the (R)AN to the PSA2 without passing through the UL CL/BP.

504. The SMF interacts with the PSA2 through the N4 interface, updates the PSA2 tunnel information, and sends a session update request to the PSA2 at the same time. The session update request is used to instruct the PSA2 to send a URR notification to the SMF.

In other words, when the SMF determines that the first user plane function (PSA1) is deleted, if the SMF needs to update the URR cell, the SMF sends a session update request to the second user plane function (PSA2). PSA2 is the protocol data associated with the session of PSA1 Unit PDU session anchor point PSA, session update request is used to instruct PSA2 to send URR notification to SMF.

In this way, the downstream traffic will be directly sent from the PSA2 to the (R)AN, so that the entire upstream and downstream traffic path switching is completed. That is, after UL CL/BP is deleted, PSA2 reports statistical traffic to SMF.

505. The SMF sends a session (PFCP session) delete message to PSA1 to instruct PSA1 to release the session on PSA1.

506. The SMF sends a session (PFCP session) delete message to the UL CL/BP to instruct the UL CL/BP to release the session on PSA1.

507. PSA2 performs traffic statistics, and if the traffic threshold is reached, it reports the accumulated traffic to the SMF.

For the implementation of PSA2 performing traffic statistics, refer to the implementation of UL CL/BP performing traffic statistics in steps 411 and 412.

Therefore, the embodiment of the present application can enable other UPFs to report URR traffic to the SMF according to the traffic accumulation in the data packet when the UL CL is deleted, so as to implement URR reporting across multiple UPFs and reduce the signaling interaction between the SMF and the UPF.

The foregoing mainly introduces the solution provided by the embodiment of the present application from the perspective of interaction between various network elements. It can be understood that, in order to realize the above-mentioned functions, each network element, such as a user plane function, a session management function, etc., includes a hardware structure and/or software module corresponding to each function. Those skilled in the art should easily realize that in combination with the units and algorithm steps of the examples described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

The embodiments of the present application can divide the user plane functions, session management functions, etc. into functional modules based on the foregoing method examples. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one process. Module. The above-mentioned integrated modules can be implemented in the form of hardware or software function modules. It should be noted that the division of modules in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.

In the case of dividing each functional module corresponding to each function, FIG. 7 shows a schematic structural diagram of an electronic device 70. The electronic device 70 may be the above-mentioned user plane function, or UL CL/BP, and the electronic device 70 includes: receiving Unit 701, processing unit 702, and sending unit 703. The receiving unit 701 is used to support the electronic device 70 to execute the processes 302 and 303 in FIG. 4, the corresponding processes of the processes 408 and 410 in FIG. 5, and the corresponding process of the process 506 in FIG. 6; the processing unit 702 is used to support the electronic device 70 The process 304 in FIG. 4 and the process 411 in FIG. 5 are executed, and the sending unit 703 is used to support the electronic device 70 to execute the process 305 in FIG. 4 and the processes 409 and 412 in FIG. 5. Among them, all relevant content of the steps involved in the above method embodiments can be cited in the functional description of the corresponding functional module, and will not be repeated here.

In the case of using an integrated unit, FIG. 8 shows a schematic diagram of a possible structure of the electronic device involved in the foregoing embodiment. The electronic device 80 includes a processing module 802 and a communication module 803. The processing module 802 is used to control and manage the actions of the electronic device. For example, the processing module 802 is used to support the electronic device 80 to execute the process 304 in FIG. 3, the process 411 in FIG. 5, and/or the technology described herein. Other processes. The communication module 803 is used to support communication between the electronic device and other network entities, for example, communication with the functional modules or network entities shown in FIG. 2 and FIG. 3. The communication module 803 includes the functions of the receiving unit 701 and the sending unit 703 described above. The electronic device 80 may also include a storage module 801 for storing program codes and data of the electronic device 80.

The processing module 802 may be a processor or a controller, for example, a central processing unit (CPU), a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), and an application-specific integrated circuit (Application-Specific Integrated Circuit). Integrated Circuit, ASIC), Field Programmable Gate Array (FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules, and circuits described in conjunction with the disclosure of this application. The processor may also be a combination of computing functions, for example, a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on. The communication module 803 may be a transceiver, a transceiver circuit, or a communication interface. The storage module 801 may be a memory.

When the processing module 802 is a processor, the communication module 803 is a communication interface, and the storage module 801 is a memory, the electronic device involved in the embodiment of the present application may be the electronic device 90 shown in FIG. 9.

Referring to FIG. 9, the electronic device 90 includes: a processor 912, a communication interface 913, a memory 911, and a bus 914. Among them, the communication interface 913, the processor 912, and the memory 911 are connected to each other through a bus 914; the bus 914 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus Wait. The bus can be divided into address bus, data bus, control bus and so on. For ease of presentation, only one thick line is used in FIG. 9, but it does not mean that there is only one bus or one type of bus.

In the case of dividing each functional module corresponding to each function, FIG. 10 shows a schematic structural diagram of an electronic device 10. The electronic device 10 may be the session management function involved in the above-mentioned embodiment, or a possible SMF In a schematic structural diagram, the electronic device 10 includes a sending unit 1001, a receiving unit 1002, and a processing unit 1003. The sending unit 1001 is used to support the electronic device 10 to execute the processes 301 and 307 in FIG. 4, the processes 404, 406, 408, and 413 in FIG. 5, and the processes 505, 506 in FIG. 6; the receiving unit 1002 is used to support the electronic device 10 The process 306 in FIG. 3 is performed. The processing unit 1003 is used to support the electronic device 10 to execute the processes 401, 402, and 403 in FIG. 5, and the processes 502, 503, and 504 in FIG. The function description of the corresponding function module will not be repeated here.

In the case of using an integrated unit, FIG. 11 shows another possible structural schematic diagram of the electronic device 10 involved in the foregoing embodiment. The electronic device 11 includes: a processing module 1102 and a communication module 1103. The processing module 1102 is used to control and manage the actions of the electronic device 11. For example, the processing module 1102 is used to support the electronic device 11 to execute the processes 401, 402, and 403 in FIG. 5, the processes 502, 503, and 504 in FIG. 6, and / Or other processes used in the techniques described herein. The communication module 1103 is used to support communication between the electronic device 11 and other network entities, for example, communication with the functional modules or network entities shown in FIG. 2 and FIG. 3. The electronic device 11 may also include a storage module 1101 for storing program codes and data of the electronic device 11.

The processing module 1102 may be a processor or a controller, for example, a CPU, a general-purpose processor, DSP, ASIC, FPGA, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules, and circuits described in conjunction with the disclosure of this application. The processor may also be a combination of computing functions, for example, a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on. The communication module 1103 may be a transceiver, a transceiver circuit, or a communication interface. The storage module 1101 may be a memory.

When the processing module 1102 is a processor, the communication module 1103 is a communication interface, and the storage module 1101 is a memory, the electronic device 11 involved in the embodiment of the present application may be the electronic device 12 shown in FIG. 12.

Referring to FIG. 12, the electronic device 12 includes a processor 1212, a communication interface 1213, a memory 1211, and a bus 1214. Among them, the communication interface 1213, the processor 1212, and the memory 1211 are connected to each other through a bus 1214; the bus 1214 may be a PCI bus or an EISA bus. The bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 12 to represent it, but it does not mean that there is only one bus or one type of bus.

The steps of the method or algorithm described in combination with the disclosure of this application can be implemented in a hardware manner, or can be implemented in a manner in which a processor executes software instructions. Software instructions can be composed of corresponding software modules, which can be stored in random access memory (Random Access Memory, RAM), flash memory, read-only memory (Read Only Memory, ROM), and erasable programmable read-only memory ( Erasable Programmable ROM (EPROM), Electrically Erasable Programmable Read-Only Memory (Electrically EPROM, EEPROM), registers, hard disk, mobile hard disk, CD-ROM or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor, so that the processor can read information from the storage medium and can write information to the storage medium. Of course, the storage medium may also be an integral part of the processor. The processor and the storage medium may be located in the ASIC. In addition, the ASIC may be located in the core network interface device. Of course, the processor and the storage medium may also exist as discrete components in the core network interface device.

Those skilled in the art should be aware that in one or more of the above examples, the functions described in this application can be implemented by hardware, software, firmware, or any combination thereof. When implemented by software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on the computer-readable medium. Computer-readable media include computer storage media and communication media, where communication media includes any media that facilitates the transfer of computer programs from one place to another. The storage medium may be any available medium that can be accessed by a general-purpose or special-purpose computer.

The above are only specific implementations of this application, but the protection scope of this application is not limited to this, and any changes or substitutions within the technical scope disclosed in this application should be covered within the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims (31)

1. A method for counting business traffic, which is characterized in that it includes:

   The first user plane function receives a session establishment request sent by the session management function, where the session establishment request includes at least one usage reporting rule URR cell corresponding to the session flow, and each URR cell includes a flow threshold;

   The first user plane function receives a first downlink data packet, where the first downlink data packet includes an identifier of the session flow, a URR bit map, and the cumulative traffic of the session flow; the URR bit map is used for Indicate the URR cells involved in the cumulative flow;

   The first user plane function counts the newly added traffic of the URR cell indicated by the URR bit map according to the first downlink data packet, and if the newly added traffic reaches the URR cell indicated by the URR bit map, The first user plane function sends a URR notification to the session management function, and the URR notification is used to apply for a new flow threshold for URR cells that reach the flow threshold.
2. The method of claim 1, wherein:

   The first user plane function is an uplink classifier UL CL or branch point BP;

   The receiving of the first downlink data packet by the first user plane function includes:

   The first user plane function receives the first downlink data packet sent by a second user plane function, and the second user plane function is a protocol data unit PDU session anchor PSA.
3. The method according to claim 1 or 2, characterized in that:

   Each URR cell also includes the URR bitmap subscript;

   The URR bit table includes at least one bit value, the bit value corresponds to the URR bitmap subscript, the bit value is the first indicator value or the second indicator value, and the first indicator value is used to indicate the value corresponding to the URR bitmap subscript The URR cell needs to accumulate traffic, and the second indicator value is used to indicate that the URR cell corresponding to the URR bitmap subscript does not need to accumulate traffic.
4. The method of claim 3, wherein:

   Each URR cell also includes a URR identifier;

   In each URR cell, a URR identifies a URR bitmap subscript mapping.
5. The method according to claim 1, wherein the first user plane function according to the statistics of the first downlink data packet statistics of the newly added flow of URR cells indicated by the first bit chart comprises:

   The first user plane function obtains the difference between the accumulated flow carried in the first downlink data packet and the accumulated flow carried in the second downlink data packet received last time, and the difference is the URR indicated by the URR bit graph The new traffic corresponding to the cell.
6. The method according to claim 1, wherein the first downlink data packet further comprises a start mark of the session flow; the start mark is used to indicate that the first downlink data packet is the session The first downlink data packet of the flow; or, the first downlink data packet further includes an end marker, and the end mark is used to indicate that the first downlink data packet is the last downlink data packet of the session flow;

   The method also includes:

   If the first downlink data packet includes the start marker, the first user plane function records the identifier of the session flow;

   If the first downlink data packet includes the end marker, the first user plane function deletes the identifier of the session flow.
7. A method for counting business traffic, which is characterized in that it includes:

   The session management function sends a session establishment request to the first user plane function, where the session establishment request includes at least one usage reporting rule URR cell corresponding to the session flow, and each URR cell includes a flow threshold;

   The session management function receives a URR notification sent by the first user plane function, where the URR notification is used to apply for a new flow threshold for URR cells in the session flow that reach a flow threshold;

   The session management function sends a URR notification to the policy control function PCF to obtain a new flow threshold.
8. The method according to claim 7, wherein the first user plane function is an uplink classifier UL CL or branch point BP; the session establishment request is used to indicate that the first user plane function is determining the URR signal When the new flow of the yuan reaches the corresponding flow threshold, a URR notification is sent to the session management function.
9. The method according to claim 7 or 8, wherein:

   Each URR cell also includes the URR bitmap subscript;

   The URR bitmap subscript corresponds to at least one bit included in the URR bitmap, and the bit value corresponding to the bit is the first indicator value or the second indicator value, and the first indicator value is used to indicate the URR signal corresponding to the URR bitmap subscript. The second indicator value is used to indicate that the URR cell corresponding to the subscript of the URR bitmap does not need to accumulate the flow.
10. The method of claim 9, wherein:

    Each URR cell also includes a URR identifier;

    In each URR cell, a URR identifier is mapped to a URR bitmap subscript.
11. The method according to claim 10, wherein the method further comprises:

    The session management function receives a URR response sent by the PCF, where the URR response includes a new traffic threshold;

    The session management function sends a URR update notification to the first user plane function, where the URR update notification includes a new traffic threshold.
12. The method according to claim 7, wherein the method further comprises:

    When the session management function determines that the first user plane function is deleted, if the session management function needs to update the URR information element, the session management function sends a session update request to the second user plane function, and the second user The plane function is a protocol data unit PDU session anchor PSA associated with the first user plane function, and the session update request is used to instruct the second user plane function to send a URR notification to the session management function.
13. A user plane function, characterized in that the user plane function is a first user plane function, and the first user plane function includes:

    A receiving module, configured to receive a session establishment request sent by a session management function, where the session establishment request includes at least one usage reporting rule URR cell corresponding to the session flow, and each URR cell includes a flow threshold;

    The receiving module is further configured to receive a first downlink data packet, where the first downlink data packet includes an identifier of the session flow, a URR bit map, and the cumulative flow of the session flow; the URR bit map is used to indicate URR cells involved in the cumulative flow;

    A processing module, configured to count the newly added traffic of URR cells indicated by the URR bit chart according to the first downlink data packet;

    The sending module is further configured to send a URR notification to the session management function if the newly added flow reaches the flow threshold corresponding to the URR cell indicated by the URR bitmap, and the URR notification is used for the purpose of reaching the flow threshold. The URR cell applies for a new flow threshold.
14. The user plane function according to claim 13, wherein the first user plane function is an uplink classifier UL CL or branch point BP;

    The receiving module is used for:

    Receiving the first downlink data packet sent by a second user plane function, where the second user plane function is a protocol data unit PDU session anchor PSA.
15. The user plane function according to claim 13 or 14, characterized in that:

    Each URR cell also includes the URR bitmap subscript;

    The URR bit table includes at least one bit value, the bit value corresponds to the URR bitmap subscript, the bit value is the first indicator value or the second indicator value, and the first indicator value is used to indicate the value corresponding to the URR bitmap subscript The URR cell needs to accumulate flow, and the second indicator value is used to indicate that the URR cell corresponding to the URR bitmap subscript does not need to accumulate flow;

    Each URR cell also includes a URR identifier; in each URR cell, a URR identifies a URR bitmap subscript mapping.
16. The user plane function according to claim 13, wherein the processing module is configured to:

    Obtain the difference between the accumulated flow carried in the first downlink data packet and the accumulated flow carried in the second downlink data packet received last time, and the difference is the newly added flow corresponding to the URR cell indicated by the URR bit chart .
17. The user plane function according to claim 13, wherein the first downlink data packet further includes a start mark of the session flow; the start mark is used to indicate the first downlink data packet Is the first downlink data packet of the session flow; or, the first downlink data packet further includes an end mark, and the end mark is used to indicate that the first downlink data packet is the last one of the session flow Downlink data packet;

    The processing module is also used for:

    If the first downlink data packet includes the start marker, record the identifier of the session flow;

    If the first downlink data packet includes the end marker, delete the identifier of the session flow.
18. A session management function, characterized in that it includes:

    A sending module, configured to send a session establishment request to the first user plane function, where the session establishment request includes at least one usage reporting rule URR cell corresponding to the session flow, and each URR cell includes a flow threshold;

    A receiving module, configured to receive a URR notification sent by the first user plane function, where the URR notification is used to apply for a new flow threshold for URR cells in the session flow that reach a flow threshold;

    The sending module is used to send URR notifications to the policy control function PCF to obtain a new flow threshold.
19. The session management function according to claim 18, wherein the first user plane function is an uplink classifier UL CL or branch point BP; the session establishment request is used to indicate that the first user plane function is determining When the newly added flow of the URR cell reaches the corresponding flow threshold, a URR notification is sent to the session management function.
20. The session management function according to claim 18 or 19, wherein each URR cell further includes a URR bitmap subscript;

    The URR bitmap subscript corresponds to at least one bit included in the URR bitmap, and the bit value corresponding to the bit is the first indicator value or the second indicator value, and the first indicator value is used to indicate the URR signal corresponding to the URR bitmap subscript. The cumulative flow of the element is required, and the second indication value is used to indicate that the URR cell corresponding to the subscript of the URR bitmap does not require the cumulative flow;

    Each URR cell also includes a URR identifier;

    In each URR cell, a URR identifier is mapped to a URR bitmap subscript.
21. The session management function according to claim 20, wherein the receiving module is further configured to receive a URR response sent by the PCF, and the URR response includes a new traffic threshold;

    The sending module is further configured to send a URR update notification to the first user plane function, where the URR update notification includes a new traffic threshold.
22. The session management function according to claim 18, wherein the sending module is further configured to:

    When the session management function determines that the first user plane function is deleted, if the session management function needs to update the URR information element, it sends a session update request to the second user plane function, and the second user plane function is the same as the first user plane function. A session-associated protocol data unit PDU session anchor PSA exists for a user plane function, and the session update request is used to instruct the second user plane function to send a URR notification to the session management function.
23. A computer-readable storage medium, characterized by comprising computer instructions, which when the computer instructions run on an electronic device, causes the electronic device to execute the method according to any one of claims 1-12.
24. A computer program product, characterized in that, when the computer program product runs on an electronic device, the electronic device is caused to execute the method according to any one of claims 1-12.
25. A user plane function, comprising: a processor and a memory; the memory is used to store computer execution instructions, and when the user plane function is running, the processor executes the computer execution stored in the memory Instructions to enable the user plane function to execute the method for counting service traffic according to any one of claims 1-6.
26. A session management function, comprising: a processor and a memory; the memory is used to store computer execution instructions, and when the session management function is running, the processor executes the computer execution stored in the memory Instructions to enable the session management function to execute the method for counting service traffic according to any one of claims 7-12.
27. A processing device, characterized in that it comprises:

    Memory, used to store computer programs;

    The processor is configured to call and run the computer program from the memory to execute the method for counting service traffic according to any one of claims 1-6 or any one of claims 7-12.
28. A processor, characterized in that it is used to execute the method for counting service traffic according to any one of claims 1-6 or any one of claims 7-12.
29. A chip system, characterized in that it includes:

    Memory, used to store computer programs;

    The processor is configured to call and run the computer program from the memory, so that the device installed with the chip system executes the statistics according to any one of claims 1-6, or any one of claims 7-12 The method of business traffic.
30. A device for implementing the method for counting business traffic according to any one of claims 1-6.
31. A device for executing the method for counting business traffic according to any one of claims 7-12.

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