CN114390699A - State parameter processing method and device and network equipment - Google Patents

Abstract

The embodiment of the application provides a state parameter processing method and device and network equipment. The method is applied to an access network element and comprises the following steps: receiving target information sent by a core network element, and acquiring a first state parameter included in the target information; the first state parameter comprises a data flow identification and a first sequence number; the first sequence number is a sequence number corresponding to a transmission order in which the core network element transmits the first data packet through the target transmission interface; generating a second state parameter of the target data stream corresponding to the data stream identification according to the first sequence number; and updating a third state parameter of the target radio bearer corresponding to the target data flow. The embodiment of the application solves the problem that in the prior art, when a PTM transmission mechanism transmits the same data packet between different access network nodes, the corresponding bearing count values may be different.

Description

State parameter processing method and device, and network device

technical field

The present application relates to the field of mobile communication technologies, and in particular, to a state parameter processing method and apparatus, and network equipment.

Background technique

In a wireless communication system, there is a scenario in which multiple terminals (User Equipment, UE) request the same downlink service data. For this scenario, the industry proposes a Point to Multipoint (PTM) mechanism. PTM allows the network to use specific radio resources to send a single copy of downlink data, and multiple UEs can receive this copy of downlink data at the same time. data. Compared with the traditional point-to-point or unicast (Point to Point, PTP) mechanism, the wireless resource consumption can be reduced.

For the traditional PTP mode, a cell can dynamically adjust the air interface transmission parameters according to the channel quality between the base station and the unicast receiving terminal, such as adjusting the Modulation and Coding Scheme (MCS) and beam direction to improve spectrum utilization efficiency . However, for the PTM mode, the signal transmission of the base station needs to cover all UEs within the cell range as much as possible, even including UEs whose location and channel quality are not known to the network, such as those not in Radio Resource Control (RRC) the UE. In view of this, the network side often has to adopt relatively conservative air interface transmission parameters, such as MCS with lower code rate and omnidirectional transmission, so as to use more air interface resources to transmit less information.

Multicast is applicable to various scenarios, including services such as live streaming of video platforms that have stricter latency requirements and looser reliability requirements, and services that have looser latency requirements and stricter reliability requirements. In most scenarios, the sender hopes that every UE that receives the service can receive all the data in the service in sequence without repetition as much as possible.

During air interface transmission, in order to ensure the lossless and sequential delivery of downlink data packets, the wireless communication system adopts a bearer mechanism to set a bearer count value for each data packet transmitted through the air interface. The bearer count value starts from 0 and accumulates one by one. The UE can perform a data continuity operation according to the count value on each data packet in a bearer, and the continuity operation includes sorting the data packets, detecting whether they are duplicated or missing, and so on.

However, in the 5th Generation New Radio (5G NR) system of the fifth generation mobile communication technology, the bearer is independently determined by the 5G access network node how to establish it. Specifically, when the 5G core network sends data to the 5G access network, it marks which data stream and which service session the data packet belongs to; and the 5G access network node can independently decide to send one or more data packets belonging to the same service session. Multiple data streams are included in the same bearer for air interface transmission.

For the PTM scenario, the time points at which multiple 5G access network nodes start PTM transmission may be different. As a result, the bearer count values for data packets with the same content are different between different 5G access network nodes, so that when the UE moves between these nodes, data continuity cannot be performed according to the bearer count values on the data packets. operation, the service quality requirements of the business cannot be met.

Therefore, in the existing PTM transmission mechanism, when the same data packet is transmitted between different access network nodes, the corresponding bearer count values may be different, resulting in the problem that the service continuity cannot be guaranteed.

SUMMARY OF THE INVENTION

The embodiments of the present application provide a state parameter processing method and device, and network equipment, so as to solve the problem that in the prior art, in the PTM transmission mechanism, when the same data packet is transmitted between different access network nodes, the corresponding bearer count value may be different The problem.

In a first aspect, an embodiment of the present application provides a state parameter processing method, which is applied to an access network element, including:

Receive target information sent by a core network element, and obtain a first state parameter included in the target information; the first state parameter includes a data stream identifier and a first sequence number; the first sequence number is the core network network The sequence number corresponding to the transmission order in which the element transmits the first data packet via the target transmission interface;

According to the first sequence number, a second state parameter of the target data stream corresponding to the data stream identifier is generated; the second state parameter indicates the count value of the data packets of the target data stream transmitted by the core network element ;

A third state parameter of the target radio bearer corresponding to the target data stream is updated; the third state parameter indicates the count value of the data packets carried by the target radio bearer.

Optionally, the method includes:

When the second data packet is sent through the air interface bearer, a second sequence number is carried; the second sequence number is determined by the third state parameter corresponding to the air interface bearer.

Optionally, generating the second state parameter of the target data stream corresponding to the data stream identifier according to the first sequence number includes:

Using the first sequence number as the second state parameter of the target data stream corresponding to the data stream identifier; or

The first serial number is added by one, or the first serial number is added by one and then modulo the preset serial number threshold to obtain the second state parameter of the target data stream corresponding to the data stream identifier.

Optionally, the acquiring the first state parameter carried in the target information includes:

Obtain the data stream identifier and the initial first sequence number carried in the target information, use the data stream identifier as the data stream identifier of the first state parameter, and use the initial first sequence number as the data stream identifier of the first state parameter the first sequence number of the first state parameter, or

Obtain the data stream identifier and the fourth sequence number carried in the target information, use the data stream identifier as the data stream identifier of the first state parameter, and use the fourth sequence number and the third state parameter as the data stream identifier. The first sequence number of the first state parameter is generated.

Optionally, the target information includes the first data packet or synchronization information.

Optionally, the updating the third state parameter of the target radio bearer corresponding to the target data stream includes:

determining a target radio bearer corresponding to the target data stream;

The second state parameter corresponding to the data stream carried by the target radio bearer is summed to obtain the third state parameter of the target radio bearer.

In a second aspect, the embodiments of the present application further provide a state parameter processing method, which is applied to a core network element, including:

Sending target information to the access network element, where the target information carries the first state parameter of the first data packet, so that the access network element generates a target data stream corresponding to the data stream identifier according to the first sequence number and update the third state parameter of the target radio bearer corresponding to the target data stream;

Wherein, the first state parameter includes the data stream identifier corresponding to the first data packet and the first sequence number; the first sequence number is the first data packet transmitted by the core network element via the target transmission interface The serial number corresponding to the transmission order of ;

The second state parameter indicates the count value of the data packets of the target data flow transmitted by the core network element; the third state parameter indicates the number of data packets carried by the target radio bearer.

Optionally, the target information includes the first data packet or synchronization information.

In a third aspect, an embodiment of the present application further provides a network device, including a memory, a transceiver, and a processor:

a memory for storing a computer program; a transceiver for sending and receiving data under the control of the processor; a processor for reading the computer program in the memory and performing the following operations:

Receive target information sent by a core network element, and obtain a first state parameter included in the target information; the first state parameter includes a data stream identifier and a first sequence number; the first sequence number is the core network network The sequence number corresponding to the transmission order in which the element transmits the first data packet via the target transmission interface;

According to the first sequence number, a second state parameter of the target data stream corresponding to the data stream identifier is generated; the second state parameter indicates the count value of the data packets of the target data stream transmitted by the core network element ;

A third state parameter of the target radio bearer corresponding to the target data stream is updated; the third state parameter indicates the count value of the data packets carried by the target radio bearer.

Optionally, the processor is used to:

When the second data packet is sent through the air interface bearer, a second sequence number is carried; the second sequence number is determined by the third state parameter corresponding to the air interface bearer.

Optionally, generating the second state parameter of the target data stream corresponding to the data stream identifier according to the first sequence number includes:

Using the first sequence number as the second state parameter of the target data stream corresponding to the data stream identifier; or

The first serial number is added by one, or the first serial number is added by one and then modulo the preset serial number threshold to obtain the second state parameter of the target data stream corresponding to the data stream identifier.

Optionally, the acquiring the first state parameter carried in the target information includes:

Obtain the data stream identifier and the initial first sequence number carried in the target information, use the data stream identifier as the data stream identifier of the first state parameter, and use the initial first sequence number as the data stream identifier of the first state parameter the first sequence number of the first state parameter, or

Obtain the data stream identifier and the fourth sequence number carried in the target information, use the data stream identifier as the data stream identifier of the first state parameter, and use the fourth sequence number and the third state parameter as the data stream identifier. The first sequence number of the first state parameter is generated.

Optionally, the target information includes the first data packet or synchronization information.

Optionally, the updating the third state parameter of the target radio bearer corresponding to the target data stream includes:

determining a target radio bearer corresponding to the target data flow;

The second state parameter corresponding to the data stream carried by the target radio bearer is summed to obtain the third state parameter of the target radio bearer.

In a third aspect, an embodiment of the present application further provides an electronic device, the electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the computer program when the processor executes the computer program. The steps in the state parameter processing method described in the first aspect above.

In a fourth aspect, an embodiment of the present application further provides a network device, including a memory, a transceiver, and a processor:

a memory for storing a computer program; a transceiver for sending and receiving data under the control of the processor; a processor for reading the computer program in the memory and performing the following operations:

Sending target information to the access network element, where the target information carries the first state parameter of the first data packet, so that the access network element generates a target data stream corresponding to the data stream identifier according to the first sequence number and update the third state parameter of the target radio bearer corresponding to the target data stream;

Wherein, the first state parameter includes the data stream identifier corresponding to the first data packet and the first sequence number; the first sequence number is the first data packet transmitted by the core network element via the target transmission interface The serial number corresponding to the transmission order of ;

The second state parameter indicates the count value of the data packets of the target data flow transmitted by the core network element; the third state parameter indicates the number of data packets carried by the target radio bearer.

Optionally, the target information includes the first data packet or synchronization information.

In a fourth aspect, an embodiment of the present application further provides a state parameter processing apparatus, which is applied to an access network element, including:

an information receiving module, configured to receive target information sent by a core network element, and obtain a first state parameter included in the target information; the first state parameter includes a data stream identifier and a first sequence number; the first sequence number a sequence number corresponding to the transmission order in which the core network element transmits the first data packet via the target transmission interface;

A parameter generation module, configured to generate a second state parameter of the target data stream corresponding to the data stream identifier according to the first sequence number; the second state parameter indicates the target data stream transmitted by the core network element The count value of the data packet;

A parameter updating module, configured to update a third state parameter of a target radio bearer corresponding to the target data stream; the third state parameter indicates a count value of data packets carried by the target radio bearer.

In a sixth aspect, the embodiments of the present application further provide a state parameter processing device, the state parameter processing device, which is applied to a core network element, including:

an information sending module, configured to send target information to an access network element, where the target information carries the first state parameter of the first data packet, so that the access network element generates a data stream according to the first sequence number identifying the second state parameter of the corresponding target data stream, and updating the third state parameter of the target radio bearer corresponding to the target data stream;

Wherein, the first state parameter includes a data stream identifier corresponding to the first data packet and a first sequence number; the first sequence number is the transmission of the first data packet transmitted by the core network element via the target transmission interface The sequence number corresponding to the order;

The second state parameter indicates the count value of the data packets of the target data flow transmitted by the core network element; the third state parameter indicates the number of data packets carried by the target radio bearer.

In a seventh aspect, an embodiment of the present application further provides an electronic device, the electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the computer program when the processor executes the computer program. as in the above method.

In an eighth aspect, an embodiment of the present application further provides a processor-readable storage medium, where a computer program is stored on the processor-readable storage medium, and when the computer program is executed by the processor, the steps in the foregoing method are implemented.

In the embodiment of the present application, the target information sent by the core network element is received, and the first state parameter included in the target information is obtained; according to the first sequence number, the second state of the target data stream corresponding to the data stream identifier is generated parameter, and update the third state parameter of the target radio bearer corresponding to the target data flow, so that when the same data packet is transmitted between different access network elements, the corresponding bearer count value is the same, so as to ensure that the UE is in different access network. Service continuity during switchover of incoming network elements.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application. , for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative labor.

FIG. 1 is one of the flowcharts of a state parameter processing method provided by an embodiment of the present application;

FIG. 2 is the second flow chart of the state parameter processing method provided by the embodiment of the present application;

FIG. 3 is one of the structural block diagrams of the state parameter processing apparatus provided by the embodiment of the present application;

FIG. 4 is the second structural block diagram of the state parameter processing apparatus provided by the embodiment of the present application;

FIG. 5 is one of the structural block diagrams of network equipment provided by an embodiment of the present application;

FIG. 6 is the second structural block diagram of a network device provided by an embodiment of the present application.

Detailed ways

The term "and/or" in the embodiments of the present application describes the association relationship between associated objects, indicating that three relationships can exist. For example, A and/or B can indicate that A exists alone, A and B exist simultaneously, and B exists alone these three situations. The character "/" generally indicates that the associated objects are an "or" relationship.

In the embodiments of the present application, the term "plurality" refers to two or more than two, and other quantifiers are similar.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The embodiments of the present application provide a state parameter processing method and device, and network equipment, so as to solve the problem of the PTM transmission mechanism in the prior art, when the same data packet is transmitted between different access network nodes, the corresponding bearer count value may be different questions.

The method and the device are conceived based on the same application. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method can be referred to each other, and repeated descriptions will not be repeated here.

In addition, the technical solutions provided in the embodiments of the present application may be applicable to various systems, especially 5G systems. For example, applicable systems may be global system of mobile communication (GSM) system, code division multiple access (CDMA) system, wideband code division multiple access (WCDMA) general packet radio Service (general packet radio service, GPRS) system, long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD) system, advanced long-term Evolution (long term evolution advanced, LTE-A) system, universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) system, 5G New Radio (New Radio, NR) system, etc. . These various systems include terminal equipment and network equipment. The system may also include a core network part, such as an evolved packet system (Evolved Packet System, EPS), a 5G system (5GS), and the like.

The terminal device involved in the embodiments of the present application may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem. In different systems, the names of the terminal equipment may be different. For example, in a 5G system, the terminal equipment may be called user equipment (User Equipment, UE). Wireless terminal equipment can communicate with one or more core networks (Core Network, CN) via a radio access network (Radio Access Network, RAN). "telephone) and computers with mobile terminal equipment, eg portable, pocket-sized, hand-held, computer-built or vehicle-mounted mobile devices, which exchange language and/or data with the radio access network. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiated Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants, PDA) and other devices. A wireless terminal device may also be referred to as a system, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point, A remote terminal (remote terminal), an access terminal (access terminal), a user terminal (user terminal), a user agent (user agent), and a user device (user device) are not limited in the embodiments of the present application.

The network device involved in the embodiments of the present application may be a base station, and the base station may include a plurality of cells providing services for the terminal. Depending on the specific application, the base station may also be called an access point, or may be a device in the access network that communicates with wireless terminal equipment through one or more sectors on the air interface, or other names. The network equipment can be used to exchange received air frames with Internet Protocol (IP) packets, and act as a router between the wireless terminal equipment and the rest of the access network, where the rest of the access network can include the Internet. Protocol (IP) communication network. The network devices may also coordinate attribute management for the air interface. For example, the network device involved in the embodiments of the present application may be a network device (Base Transceiver Station, BTS) in a Global System for Mobile Communications (GSM) or a Code Division Multiple Access (Code Division Multiple Access, CDMA). ), or a network device (NodeB) in a Wide-band Code Division Multiple Access (WCDMA), or an evolved network device in a long term evolution (LTE) system (evolutional Node B, eNB or e-NodeB), a 5G base station (gNB) in a 5G network architecture (next generation system), or a Home evolved Node B (HeNB), a relay node (relay node), A home base station (femto), a pico base station (pico), etc., are not limited in the embodiments of the present application. In some network structures, network devices may include centralized unit (CU) nodes and distributed unit (DU) nodes, which may also be geographically separated.

One or more antennas can be used between the network device and the terminal device for multi-input multi-output (MIMO) transmission, and the MIMO transmission can be single-user MIMO (Single User MIMO, SU-MIMO) or multi-user MIMO ( Multiple User MIMO, MU-MIMO). According to the form and number of root antenna combinations, MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, or diversity transmission, precoding transmission, or beamforming transmission.

In a wireless communication system, handover refers to the operation of changing the transmission path in the communication network for a service. In the handover process that involves changing the network element where the Packet Data Convergence Protocol (PDCP) is located (that is, it was originally transmitted through one PDCP network element, but was transferred to another PDCP network element at a certain time), in order to improve the use of PTP The continuity of downlink services sent in the form of transmission even meets the requirements of lossless and sequential delivery. The source PDCP network element of the handover will provide the target PDCP network element of the handover with the data it has received from the core network but has not yet been delivered to the UE. This mechanism Called "Data For Warding".

Generally, the mapping of service flows on the source PDCP network element side and the target PDCP network element side to the radio bearer is the same, and data forwarding can be performed according to the granularity of the radio bearer, and each data packet contains a sequence number. At the same time, the source PDCP network element side also provides a transmission status summary of the source PDCP network element to the target PDCP network element side, wherein the PDCP count value indicates which PDCP data packets have been successfully received by the UE through the air interface. During the switching process, the UPF will send an end marker (End Marker) to the source transmission path for each session, and all subsequent data will be sent through the new transmission path. When the source PDCP network element side receives the end identifier sent by the UPF, it knows that the session is no longer transmitted through the N3 channel on the source side, and the previously received data packet is the last data packet transmitted through the channel. Thereafter, for each radio bearer, when all the data to be forwarded on the radio bearer have been sent to the target PDCP network element side, the source PDCP network element side will send an end identifier. When the target PDCP receives the end identifier for the radio bearer, it learns that the data forwarding for the radio bearer has ended. Thereafter, for new data packets it receives from the UPF via the Service Data Adaptation Protocol (SDAP) layer, the numbering will continue on the basis of the count value of the last data packet forwarded by the data. This mechanism ensures that when the UE receives data, the count value of the PDCP is continuous, and the content of the data packet is also continuous.

However, if during the handover process of the target UE, the target PDCP network element side of the service data is sending the service data in the way of PTM, then in order not to interfere with the service continuity of other UEs receiving the service data, the PDCP will not be adjusted for the target UE. count value. Therefore, to ensure the service continuity of the target UE, it is required that when the source side and the target side transmit service data packets with the same content, their PDCP count values should also be the same. Therefore, in order to ensure the same PDCP count value when different PDCP network elements transmit service data packets with the same content, an embodiment of the present application provides a state parameter processing method, as shown in FIG. 1 , the method is applied to an access network network element, the method includes:

Step 101: Receive target information sent by a core network element, and obtain a first state parameter included in the target information; the first state parameter includes a data stream identifier and a first sequence number; the first sequence number is the The core network element transmits the sequence number corresponding to the transmission order of the first data packet via the target transmission interface.

Among them, the access network elements are such as PDCP network elements or radio link control layer (Radio Link Control, RLC) network elements; core network network elements such as user plane function (User Plane Function, UPF) network elements, access and mobility A management function (Access and Mobility Management Function, AMF) network element or a session management function (Session Management Function, SMF) network element. For the convenience of description, in the embodiments of this application, the access network element is the PDCP network element, and the core network element is the UPF network element. network element) is similar to the embodiment of the present application, and details are not repeated here.

Specifically, the AMF network element is a relatively core module in the network, and each UE is only connected to one AMF at the same time. The AMF network element communicates with the SMF network element through the Nsmf interface, such as requesting the SMF to establish, modify, and release a service context. The service data is managed by the SMF network element in the form of sessions according to service attributes, IP routing of the backbone network and other parameters, and each session is managed by only one SMF. In each session, according to the quality of service (Quality of Service, QoS) requirements of different service data, it can be divided into one or more service data streams, and a data stream identifier can be set for each service data stream. The SMF network element manages the UPF network element through the N4 interface, such as requesting the UPF to establish, modify, and release the transmission channel of service data.

When receiving the target information sent by the core network element, the access network element obtains the first state parameter included in the target information; the first state parameter includes a data stream identifier and a first sequence number.

Specifically, the data stream identifier is the identifier of the data stream to which the currently transmitted service data packet belongs; for example, when the UPF network element sends the service data that can be transmitted through the air interface by using the PTM method through the N3 interface, for each data stream , set a state variable Tx_NEXT_i_UPF, where i identifies the identifier of the data stream. Usually, the initial value of this state variable is 0, but it can also be other values.

The first sequence number is the sequence number corresponding to the transmission order in which the core network element transmits the first data packet via the target transmission interface; the target transmission interface is, for example, the N3 interface, under normal circumstances, the UPF network element northbound communicates with the outside world through the N6 interface. The data network (for example, the backbone network) of the network exchanges service data, and the southbound exchanges service data with the access network elements through the N3 interface. If the access network is a 5G wireless access network, the N3 interface is also called the NG-U interface, that is, the user plane part of the NG interface.

When the UPF network element sends the first data packet belonging to the data flow i through the N3 interface, it first adds a first sequence number (Sequence Number) to the data packet header of the first data packet, which is represented by Tx_NEXT_N3_i_UPF. By adding the serial number of the interface, the N3 channel helps all data packets in the session to be transmitted in a lossless and orderly manner.

In this way, when the first data packet that can be transmitted through the air interface in the manner of PTM is received through the N3 interface, the first sequence number is sent to the SDAP layer of the access network device (eg gNB). The SDAP layer maps the first data packet to the corresponding radio bearer according to the data flow identifier in the data packet and the preset mapping relationship, and sends the first data packet to the PDCP layer of the gNB together with the first sequence number therein.

Step 102, according to the first sequence number, generate a second state parameter of the target data flow corresponding to the data flow identifier; the second state parameter indicates the data packet of the target data flow transmitted by the core network element count value.

The access network element further processes the first sequence number to obtain a second state parameter; the second state parameter indicates the count value of the data packets of the target data flow transmitted by the core network element, such as target data The count value of the packets of flow i.

Optionally, the second state parameter is represented by Rx_NEXT_N3_i_PDCP_j, where j represents the identifier of the PDCP; the second state parameter can be obtained by adding 1 to the first sequence number, and the second state parameter represents the next one of the currently transmitted first data packet. The sequence number of the N3 data packet; the first sequence number plus 1 can also be modulo the preset sequence number upper limit plus 1 as the first sequence number; optionally, the preset sequence number upper limit plus 1 is represented by rangeN3SN, which takes The value can be 2 ²⁴ .

Step 103: Update the third state parameter of the target radio bearer corresponding to the target data flow; the third state parameter indicates the count value of the data packets carried by the target radio bearer.

The access network element generates a PDCP data packet belonging to the target (for example, radio bearer k) according to the second state parameter, sets the count value of the PDCP data packet as the third state parameter (Tx_NEXT_Uu_k_PDCP_j), and performs subsequent processing, For example, the lowest bits (preset data bits) of the count value are truncated as the third state parameter and submitted to the lower protocol layer.

Specifically, after generating the second state parameter, the access network element updates the third state parameter; the third state parameter represents the count value of all data flows mapped to the radio bearer k, that is, the number of data packets mapped to the target radio bearer Carry out the summation, that is, the PDCP count value of the target radio bearer; optionally, the PDCP count value is usually provided with a maximum threshold, for example, the maximum threshold value is 2 ³² ; if the third state parameter is greater than or equal to the maximum threshold, then PDCP count The lowest bits of the value (preset data bits) are truncated as the third state parameter.

In this way, on the one hand, when two different access network elements map data streams according to the same mapping relationship between data streams and radio bearers, and transmit service data packets through the air interface in a PTM manner, the core network elements through the N3 The sequential transmission of the interface ensures that the two access network elements can receive service data in exactly the same order.

On the other hand, when the third state parameter (the PDCP count value, that is, the bearer count value) is calculated for the PDCP data packet, the value of the third state parameter is always: The second state parameter. Since the order in which different access network elements receive data packets through the N3 interface is the same, when they process any data packet, their respective "previous data packets of each data flow" are all the same. Therefore, it can be ensured that as long as the mapping relationship between the data flow and the data bearer is the same between different access network elements, the third state parameter calculated for the same service data is also the same; and the access network elements are carried through the air interface. When sending a data packet to the UE, the sequence number of the sent data packet will be determined according to the third state parameter, that is, the sequence number of the data packet received by the UE is determined according to the third state parameter; in this way, if the UE When switching between different access network elements, such as switching from gNB1 to gNB2, since the third state parameter calculated by gNB1 and gNB2 for the same piece of service data is also the same, the sequence numbers sent by the two to the UE are also the same. That is, the sequence numbers of the data packets received by the UE under different access network elements are consistent, thereby ensuring service continuity when the UE moves between gNBs.

In the embodiment of the present application, the target information sent by the core network element is received, and the first state parameter included in the target information is obtained; and the second state parameter of the target data stream corresponding to the data stream identifier is generated according to the first sequence number. , and update the third state parameter of the target radio bearer corresponding to the target data flow, so that when the same data packet is transmitted between different access network elements, the corresponding bearer count value is the same, so as to ensure that the UE accesses Service continuity during network element handover. The embodiments of the present application solve the problem that the corresponding bearer count values may be different when the same data packet is transmitted between different access network nodes in the PTM transmission mechanism in the prior art.

In an optional embodiment, the method includes:

When the second data packet is sent through the air interface bearer, the second sequence number is carried; the second sequence number is determined by the third state parameter corresponding to the air interface bearer, for example, by truncating the lowest bits of the third state parameter (pre- Set the number of data bits) as the second serial number.

Since different access network elements transmit the same data packet, the corresponding bearer counts are the same; if the UE switches between different access network elements, such as switching from gNB1 to gNB2, since gNB1 and gNB2 are for the same service The third state parameter calculated by the data is also the same, and the sequence numbers sent by the two to the UE are also the same, that is, the sequence numbers of the data packets received by the UE under different access network elements are consistent, thereby ensuring that Service continuity when UE moves between gNBs.

In an optional embodiment, the generating the second state parameter of the target data stream corresponding to the data stream identifier according to the first sequence number includes:

Using the first sequence number as the second state parameter of the target data stream corresponding to the data stream identifier; or

The first serial number is added by one, or the first serial number is added by one and then modulo the preset serial number threshold to obtain the second state parameter of the target data stream corresponding to the data stream identifier.

The second state parameter can be obtained by adding 1 to the first sequence number, then the second state parameter represents the sequence number of the next N3 data packet of the currently transmitted first data packet; the first sequence number can also be added after 1 and the pre-defined sequence number. Set the serial number threshold (preset serial number upper limit) plus 1 modulo as the first serial number; optionally, the preset serial number threshold plus 1 may be 2 ²⁴ .

In an optional embodiment, the acquiring the first state parameter carried in the target information includes:

Obtain the data stream identifier and the initial first sequence number carried in the target information, use the data stream identifier as the data stream identifier of the first state parameter, and use the initial first sequence number as the data stream identifier of the first state parameter the first sequence number of the first state parameter; or

Obtain the data stream identifier and the fourth sequence number carried in the target information, use the data stream identifier as the data stream identifier of the first state parameter, and use the fourth sequence number and the third state parameter as the data stream identifier. The first sequence number of the first state parameter is generated.

Since in the wireless communication system, the count value, serial number and state variable are often stored in the format of a non-negative integer with a fixed bit length, theoretically, there is a situation of numerical circulation (for example, in an 8-bit non-negative integer value, 255+1= 0). Therefore, the first serial number of the first state parameter is generated according to the fourth serial number and the third state parameter. For example, the number of data bits of the fourth serial number is smaller than the number of data bits of the third state variable. Some data bits of the original fourth serial number are truncated; for example, if the third state parameter is 5 data bits, and the fourth serial number is 3 data bits, it means that the fourth serial number is intercepted from the original fourth serial number The result of the lowest 3 bits; that is, after the Hyper Frame Number (Hyper Frame Number, HFN), the original fourth serial number is truncated with the highest data bits; therefore, in the embodiment of the present application, if compared to the third State parameter, the fourth serial number lacks N data bits, then the first N data bits of the third state variable are added before the fourth serial number to restore the first serial number.

For example, in order to reduce resource consumption, when the UPF network element sends downlink data, it still contains the N3 sequence number (the fourth sequence number), and when the gNB network element receives the data, it firstly uses the third sequence number corresponding to the N3 sequence number. The state parameter determines the N3 count value, and then determines the first serial number.

In an optional embodiment, the target information includes the first data packet or synchronization information.

If PDCP is processing the earliest received data packet, such as the first data packet of data stream i, the second state parameter cannot be calculated due to the lack of the previous data packet of the data stream; therefore, when the access network element starts to pass When the N3 interface receives service data, and the service data can be transmitted through the air interface by using the PTM method, the UPF sends a synchronization message through the N3 interface, which includes the identifier of each data stream in the corresponding session, and the data stream for the data stream. first serial number.

In this way, after receiving the synchronization information, the network element of the access network initializes the value of the second state parameter to the second state parameter calculated according to the first sequence number in the synchronization information according to the identifier of the data flow in the synchronization information.

In an optional embodiment, the updating the third state parameter of the target radio bearer corresponding to the target data stream includes:

determining a target radio bearer corresponding to the target data flow;

Perform a summation process on the second state parameters corresponding to the data streams carried by the target radio bearer to obtain a third state parameter of the target radio bearer, where the third state parameter represents all data streams mapped to the target radio bearer. The count value, that is, the summation of the number of data packets mapped to the target radio bearer, that is, the PDCP count value of the target radio bearer.

As an example, refer to the following Table 1, which shows some state parameters of the service session transmitted through the air interface by means of PTM. It contains three data streams, whose identifiers are R, G, and B, respectively. Both the gNB1 network element and the gNB2 network element map the data streams R and G to the radio bearer 1, and map the data stream B to the radio bearer 2.

gNB1 starts to receive data when UPF first starts sending data through N3 interface, while gNB2 starts to receive after UPF has transmitted 10 data packets.

Wherein, Tx_NEXT_N3_R_UPF represents the first sequence number of the data stream R;

Tx_NEXT_N3_G_UPF represents the first sequence number of the data stream G;

Tx_NEXT_N3_B_UPF represents the first sequence number of data stream B;

Rx_NEXT_N3_R_PDCP_1 represents the second state parameter of data stream R in PDCP1;

Rx_NEXT_N3_G_PDCP_1 represents the second state parameter of data stream G in PDCP1;

Rx_NEXT_N3_B_PDCP_1 represents the second state parameter of data stream B in PDCP1;

Tx_NEXT_Uu_1_PDCP_1 represents the third state parameter of radio bearer 1;

Tx_NEXT_Uu_2_PDCP_1 represents the third state parameter of radio bearer 2 .

Table 1:

According to Table 1, at time T0, the N3 interface transmits synchronization information, which indicates that the current first sequence number of each data stream is 0. At this time, the network element gNB1 of the access network directly sets the second state parameter for each data flow to the value of the corresponding first sequence number, that is, 0; at the same time, gNB1 sets the third state parameter of the radio bearer 1 to the data flow The sum of the second state parameter corresponding to R and the second state parameter corresponding to data stream G is 0, and the third state parameter of radio bearer 1 is set to the second state parameter corresponding to data stream B, that is, 0.

At time T1, N3 transmits data packet No. 0 of data stream B. At this time, the access network element gNB1 determines that the first sequence number of data stream B is 0, and adds 1 to the first sequence number to obtain the second state parameter 1. ; Simultaneously update the third state parameter of the radio bearer 2 to the value of the second state parameter of the data stream B, that is, 1.

At time T2, N3 transmits the data packet No. 0 of the data stream G. At this time, the access network element gNB1 determines that the first sequence number of the data stream G is 0, and adds 1 to the first sequence number to obtain the second state parameter 1. ; simultaneously update the third state parameter of the radio bearer 1 to be the sum of the second state parameter of the data stream R and the second state parameter of the data stream G, that is, 1;

At time T3, N3 transmits data packet No. 1 of data stream B. At this time, the access network element gNB1 determines that the first sequence number of data stream G is 1, and adds 1 to the first sequence number to obtain the second state parameter 2 ; simultaneously update the third state parameter of radio bearer 2 to the value of the second state parameter of data stream B, that is, 2;

...

When gNB2 starts to receive data packets at different times, the third state parameter calculated in the same way as above is the same, so the sequence numbers of the data packets sent by gNB1 and gNB2 to the UE are also the same, and the UE is under different gNB network elements. The sequence numbers of the received data packets are consistent, thereby ensuring service continuity when the UE moves between gNBs.

In the embodiment of the present application, the target information sent by the core network element is received, and the first state parameter included in the target information is obtained; and the second state parameter of the target data stream corresponding to the data stream identifier is generated according to the first sequence number. , and update the third state parameter of the target radio bearer corresponding to the target data flow, so that when the same data packet is transmitted between different access network elements, the corresponding bearer count value is the same, so as to ensure that the UE accesses Service continuity during network element handover.

Referring to FIG. 2, an embodiment of the present application provides a state parameter processing method, the method is applied to a core network element, and the method includes:

Step 201: Send target information to an access network element, where the target information carries a first state parameter of a first data packet, so that the access network element generates a data flow identifier corresponding to the first sequence number. the second state parameter of the target data stream, and update the third state parameter of the target radio bearer corresponding to the target data stream.

The network elements of the access network are, for example, PDCP network elements or RLC network elements; core network network elements UPF network elements, AMF network elements or SMF network elements. For the convenience of description, in the embodiments of this application, the access network element is the PDCP network element, and the core network element is the UPF network element. network element) is similar to the embodiment of the present application, and details are not repeated here.

Specifically, the AMF network element is a relatively core module in the network, and each UE is only connected to one AMF at the same time. The AMF network element communicates with the SMF network element through the Nsmf interface, such as requesting the SMF to establish, modify, and release a service context. The service data is managed by the SMF network element in the form of sessions according to service attributes, IP routing of the backbone network and other parameters, and each session is managed by only one SMF. In each session, according to the quality of service (Quality of Service, QoS) requirements of different service data, it can be divided into one or more service data streams, and a data stream identifier can be set for each service data stream. The SMF network element manages the UPF network element through the N4 interface, such as requesting the UPF to establish, modify, and release the transmission channel of service data.

When receiving the target information sent by the core network element, the access network element obtains the first state parameter included in the target information; the first state parameter includes a data stream identifier and a first sequence number.

Specifically, the data stream identifier is the identifier of the data stream to which the currently transmitted service data packet belongs; for example, when the UPF network element sends the service data that can be transmitted through the air interface by using the PTM method through the N3 interface, for each data stream , set a state variable Tx_NEXT_i_UPF, where i identifies the identifier of the data stream. Usually, the initial value of this state variable is 0, but it can also be other values.

Wherein, the first state parameter includes the data stream identifier corresponding to the first data packet and the first sequence number; the first sequence number is the first data packet transmitted by the core network element via the target transmission interface The serial number corresponding to the transmission order of the NE; the target transmission interface is such as the N3 interface. Normally, the UPF network element exchanges service data with the external data network (such as the backbone network) through the N6 interface in the north direction, and communicates with the access network through the N3 interface in the south direction. Meta interactive business data. If the access network is a 5G wireless access network, the N3 interface is also called the NG-U interface, that is, the user plane part of the NG interface.

The second state parameter indicates the count value of the data packets of the target data flow transmitted by the core network element; the third state parameter indicates the number of data packets carried by the target radio bearer. The access network element further processes the first sequence number to obtain a second state parameter; the second state parameter indicates the count value of the data packets of the target data flow transmitted by the core network element, such as target data The count value of the packets of flow i.

The access network element generates a PDCP data packet belonging to the target (for example, radio bearer k) according to the second state parameter, sets the count value of the PDCP data packet as the third state parameter (Tx_NEXT_Uu_k_PDCP_j), and performs subsequent processing, For example, the lowest bits (preset data bits) of the count value are truncated as the third state parameter and submitted to the lower protocol layer.

Specifically, after generating the second state parameter, the access network element updates the third state parameter; the third state parameter represents the count value of all data flows mapped to the radio bearer k, that is, the number of data packets mapped to the target radio bearer Carry out the summation, that is, the PDCP count value of the target radio bearer; optionally, the PDCP count value is usually provided with a maximum threshold, for example, the maximum threshold value is 2 ³² ; if the third state parameter is greater than the third state parameter, then the PDCP count value is The lowest number of bits (preset data bits) of is truncated as the third state parameter.

In this way, on the one hand, when two different access network elements map data streams according to the same mapping relationship between data streams and radio bearers, and transmit service data packets through the air interface in a PTM manner, the core network elements through the N3 The sequential transmission of the interface ensures that the two access network elements can receive service data in exactly the same order.

On the other hand, when the third state parameter (the PDCP count value, that is, the bearer count value) is calculated for the PDCP data packet, the value of the third state parameter is always: The second state parameter. Since the order in which different access network elements receive data packets through the N3 interface is the same, when they process any data packet, their respective "previous data packets of each data flow" are all the same. Therefore, it can be ensured that as long as the mapping relationship between the data flow and the data bearer is the same between different access network elements, the third state parameter calculated for the same service data is also the same; and the access network element is carried through the air interface. When sending a data packet to the UE, the sequence number of the sent data packet will be determined according to the third state parameter, that is, the sequence number of the data packet received by the UE is determined according to the third state parameter; in this way, if the UE When switching between different access network elements, such as switching from gNB1 to gNB2, since the third state parameter calculated by gNB1 and gNB2 for the same piece of service data is also the same, the sequence numbers sent by the two to the UE are also the same. That is, the sequence numbers of the data packets received by the UE under different access network elements are consistent, thereby ensuring service continuity when the UE moves between gNBs.

In an optional embodiment, the target information includes the first data packet or synchronization information.

If PDCP is processing the earliest received data packet, such as the first data packet of data stream i, the second state parameter cannot be calculated due to the lack of the previous data packet of the data stream; therefore, when the access network element starts to pass When the N3 interface receives service data, and the service data can be transmitted through the air interface by using the PTM method, the UPF sends a synchronization message through the N3 interface, which includes the identifier of each data stream in the corresponding session, and the data stream for the data stream. first serial number.

In this way, after receiving the synchronization information, the network element of the access network initializes the value of the second state parameter to the second state parameter calculated according to the first sequence number in the synchronization information according to the identifier of the data flow in the synchronization information.

In the embodiment of the present application, target information is sent to the access network element, and the target information carries the first state parameter of the first data packet, so that the access network element generates a data stream according to the first sequence number Identify the second state parameter of the corresponding target data stream, and update the third state parameter of the target radio bearer corresponding to the target data stream, so that when the same data packet is transmitted between different access network elements, the corresponding bearer The count values are the same to ensure the service continuity of the UE when switching between different access network elements. The embodiments of the present application solve the problem that the corresponding bearer count values may be different when the same data packet is transmitted between different access network nodes in the PTM transmission mechanism in the prior art.

The state parameter processing method provided by the embodiments of the present application has been described above, and the state parameter processing apparatus provided by the embodiments of the present application will be described below with reference to the accompanying drawings.

Referring to FIG. 3 , an embodiment of the present application further provides a state parameter processing apparatus, which is applied to an access network element, including:

An information receiving module 301 is configured to receive target information sent by a core network element, and obtain a first state parameter included in the target information; the first state parameter includes a data stream identifier and a first sequence number; the first sequence The number is the sequence number corresponding to the transmission order in which the core network element transmits the first data packet via the target transmission interface.

The network elements of the access network are, for example, PDCP network elements or RLC network elements; core network network elements UPF network elements, AMF network elements or SMF network elements. For the convenience of description, in the embodiments of this application, the access network element is the PDCP network element, and the core network element is the UPF network element. network element) is similar to the embodiment of the present application, and details are not repeated here.

Specifically, the AMF network element is a relatively core module in the network, and each UE is only connected to one AMF at the same time. The AMF network element communicates with the SMF network element through the Nsmf interface, such as requesting the SMF to establish, modify, and release a service context. The service data is managed by the SMF network element in the form of sessions according to service attributes, IP routing of the backbone network and other parameters, and each session is managed by only one SMF. In each session, according to the QoS requirements of different service data, it can be divided into one or more service data streams, and a data stream identifier can be set for each service data stream. The SMF network element manages the UPF network element through the N4 interface, such as requesting the UPF to establish, modify, and release the transmission channel of service data.

When receiving the target information sent by the core network element, the access network element obtains the first state parameter included in the target information; the first state parameter includes a data stream identifier and a first sequence number.

Specifically, the data stream identifier is the identifier of the data stream to which the currently transmitted service data packet belongs; for example, when the UPF network element sends the service data that can be transmitted through the air interface by using the PTM method through the N3 interface, for each data stream , set a state variable Tx_NEXT_i_UPF, where i identifies the identifier of the data stream. Usually, the initial value of this state variable is 0, but it can also be other values.

The first sequence number is the sequence number corresponding to the transmission order in which the core network element transmits the first data packet via the target transmission interface; the target transmission interface is, for example, the N3 interface, under normal circumstances, the UPF network element northbound communicates with the outside world through the N6 interface. The data network (for example, the backbone network) of the network exchanges service data, and the southbound exchanges service data with network elements of the access network through the N3 interface. If the access network is a 5G wireless access network, the N3 interface is also called the NG-U interface, that is, the user plane part of the NG interface.

When the UPF network element sends the first data packet belonging to the data flow i through the N3 interface, it first adds a first sequence number to the data packet header of the first data packet, which is represented by Tx_NEXT_N3_i_UPF. By adding the serial number of the interface, the N3 channel helps all data packets in the session to be transmitted in a lossless and orderly manner.

In this way, when the first data packet that can be transmitted through the air interface in the manner of PTM is received through the N3 interface, the first sequence number is sent to the SDAP layer of the access network device (eg gNB). The SDAP layer maps the first data packet to the corresponding radio bearer according to the data flow identifier in the data packet and the preset mapping relationship, and sends the first data packet to the PDCP layer of the gNB together with the first sequence number therein.

A parameter generation module 302, configured to generate a second state parameter of the target data stream corresponding to the data stream identifier according to the first sequence number; the second state parameter indicates the target data transmitted by the core network element The count value of the flow's packets.

The access network element further processes the first sequence number to obtain a second state parameter; the second state parameter indicates the count value of the data packets of the target data flow transmitted by the core network element, such as target data The count value of the packets of flow i.

Optionally, the second state parameter is represented by Rx_NEXT_N3_i_PDCP_j, where j represents the identifier of the PDCP; the second state parameter can be obtained by adding 1 to the first sequence number, and the second state parameter represents the next one of the currently transmitted first data packet. The sequence number of the N3 data packet; the first sequence number plus 1 can also be modulo the preset sequence number upper limit plus 1 as the first sequence number; optionally, the preset sequence number upper limit plus 1 is represented by rangeN3SN, which takes The value can be 2 ²⁴ .

A parameter updating module 303, configured to update a third state parameter of a target radio bearer corresponding to the target data stream; the third state parameter indicates a count value of data packets carried by the target radio bearer.

The access network element generates a PDCP data packet belonging to the target (for example, radio bearer k) according to the second state parameter, sets the count value of the PDCP data packet as the third state parameter (Tx_NEXT_Uu_k_PDCP_j), and performs subsequent processing, For example, the lowest bits (preset data bits) of the count value are truncated as the third state parameter and submitted to the lower protocol layer.

Specifically, after generating the second state parameter, the access network element updates the third state parameter; the third state parameter represents the count value of all data flows mapped to the radio bearer k, that is, the number of data packets mapped to the target radio bearer Carry out the summation, that is, the PDCP count value of the target radio bearer; optionally, the PDCP count value is usually provided with a maximum threshold, for example, the maximum threshold value is 2 ³² ; if the third state parameter is greater than the third state parameter, then the PDCP count value is The lowest number of bits (preset data bits) of is truncated as the third state parameter.

In this way, on the one hand, when two different access network elements map data streams according to the same mapping relationship between data streams and radio bearers, and transmit service data packets through the air interface in a PTM manner, the core network elements through the N3 The sequential transmission of the interface ensures that the two access network elements can receive service data in exactly the same order.

On the other hand, when the third state parameter (the PDCP count value, that is, the bearer count value) is calculated for the PDCP data packet, the value of the third state parameter is always: The second state parameter. Since the order in which different access network elements receive data packets through the N3 interface is the same, when they process any data packet, their respective "previous data packets of each data flow" are all the same. Therefore, it can be ensured that as long as the mapping relationship between the data flow and the data bearer is the same between different access network elements, the third state parameter calculated for the same service data is also the same; and the access network elements are carried through the air interface. When sending a data packet to the UE, the sequence number of the sent data packet will be determined according to the third state parameter, that is, the sequence number of the data packet received by the UE is determined according to the third state parameter; in this way, if the UE When switching between different access network elements, such as switching from gNB1 to gNB2, since the third state parameter calculated by gNB1 and gNB2 for the same piece of service data is also the same, the sequence numbers sent by the two to the UE are also the same. That is, the sequence numbers of the data packets received by the UE under different access network elements are consistent, thereby ensuring service continuity when the UE moves between gNBs.

Optionally, in this embodiment of the present application, the method includes:

When the second data packet is sent through the air interface bearer, a second sequence number is carried; the second sequence number is determined by the third state parameter corresponding to the air interface bearer.

Optionally, in this embodiment of the present application, the parameter generation module 302 includes:

a first processing submodule, configured to use the first sequence number as the second state parameter of the target data stream corresponding to the data stream identifier; or

The second processing sub-module is configured to add one to the first serial number, or add one to the first serial number and modulo the preset serial number threshold to obtain the target corresponding to the data stream identifier. The second state parameter of the data stream.

Optionally, in this embodiment of the present application, the information receiving module 301 includes:

The first acquisition sub-module is used to acquire the data stream identifier and the initial first sequence number carried in the target information, use the data stream identifier as the data stream identifier of the first state parameter, and use the data stream identifier as the first state parameter. an initial first sequence number as the first sequence number of the first state parameter, or

The second acquisition sub-module is configured to acquire the data stream identifier and the fourth sequence number carried in the target information, use the data stream identifier as the data stream identifier of the first state parameter, and obtain the data stream identifier according to the first state parameter. The fourth sequence number and the third state parameter generate the first sequence number of the first state parameter.

Optionally, in this embodiment of the present application, the target information includes the first data packet or synchronization information.

Optionally, in this embodiment of the present application, the parameter update module 303 includes:

a determination submodule, configured to determine a target radio bearer corresponding to the target data stream;

The summation submodule is configured to perform summation processing on the second state parameters corresponding to the data stream carried by the target radio bearer to obtain the third state parameter of the target radio bearer.

In the embodiment of the present application, the information receiving module 301 receives the target information sent by the core network element, and obtains the first state parameter included in the target information; the parameter generating module 302 generates the corresponding data flow identifier according to the first sequence number. The second state parameter of the target data stream, the parameter updating module 303 updates the third state parameter of the target radio bearer corresponding to the target data stream, so that when the same data packet is transmitted between different access network elements, the corresponding bearer The count values are the same to ensure the service continuity of the UE when switching between different access network elements.

Referring to FIG. 4 , an embodiment of the present application further provides a state parameter processing apparatus, which is applied to a core network element, including:

An information sending module 401, configured to send target information to an access network element, where the target information carries a first state parameter of a first data packet, so that the access network element generates data according to the first sequence number The flow identifier corresponds to the second state parameter of the target data flow, and updates the third state parameter of the target radio bearer corresponding to the target data flow.

The network elements of the access network are, for example, PDCP network elements or RLC network elements; core network network elements UPF network elements, AMF network elements or SMF network elements. For the convenience of description, in the embodiments of this application, the access network element is the PDCP network element, and the core network element is the UPF network element. network element) is similar to the embodiment of the present application, and details are not repeated here.

Specifically, the AMF network element is a relatively core module in the network, and each UE is only connected to one AMF at the same time. The AMF network element communicates with the SMF network element through the Nsmf interface, such as requesting the SMF to establish, modify, and release a service context. The service data is managed by the SMF network element in the form of sessions according to service attributes, IP routing of the backbone network and other parameters, and each session is managed by only one SMF. In each session, according to the quality of service (Quality of Service, QoS) requirements of different service data, it can be divided into one or more service data streams, and a data stream identifier can be set for each service data stream. The SMF network element manages the UPF network element through the N4 interface, such as requesting the UPF to establish, modify, and release the transmission channel of service data.

When receiving the target information sent by the core network element, the access network element obtains the first state parameter included in the target information; the first state parameter includes a data stream identifier and a first sequence number.

Specifically, the data stream identifier is the identifier of the data stream to which the currently transmitted service data packet belongs; for example, when the UPF network element sends the service data that can be transmitted through the air interface by using the PTM method through the N3 interface, for each data stream , set a state variable Tx_NEXT_i_UPF, where i identifies the identifier of the data stream. Usually, the initial value of this state variable is 0, but it can also be other values.

Wherein, the first state parameter includes a data stream identifier corresponding to the first data packet and a first sequence number; the first sequence number is the transmission of the first data packet transmitted by the core network element via the target transmission interface The sequence number corresponding to the sequence; the target transmission interface is such as the N3 interface. Normally, the UPF network element exchanges service data with the external data network (such as the backbone network) through the N6 interface in the northbound direction, and interacts with the access network network element through the N3 interface in the southbound direction. business data. If the access network is a 5G wireless access network, the N3 interface is also called the NG-U interface, that is, the user plane part of the NG interface.

The second state parameter indicates the count value of the data packets of the target data flow transmitted by the core network element; the third state parameter indicates the number of data packets carried by the target radio bearer. The access network element further processes the first sequence number to obtain a second state parameter; the second state parameter indicates the count value of the data packets of the target data flow transmitted by the core network element, such as target data The count value of the packets of flow i.

The access network element generates a PDCP data packet belonging to the target (for example, radio bearer k) according to the second state parameter, sets the count value of the PDCP data packet as the third state parameter (Tx_NEXT_Uu_k_PDCP_j), and performs subsequent processing, For example, the lowest bits (preset data bits) of the count value are truncated as the third state parameter and submitted to the lower protocol layer.

Optionally, in this embodiment of the present application, the target information includes the first data packet or synchronization information.

In the embodiment of the present application, the information sending module 401 sends target information to the access network element, and the target information carries the first state parameter of the first data packet, so that the access network element can use the first sequence number according to the first sequence number. , generate the second state parameter of the target data flow corresponding to the data flow identifier, and update the third state parameter of the target radio bearer corresponding to the target data flow, so as to realize the transmission of the same data packet between different access network elements. , the corresponding bearer count values are the same, so as to ensure the service continuity of the UE when switching between different access network elements. The embodiments of the present application solve the problem that the corresponding bearer count values may be different when the same data packet is transmitted between different access network nodes in the PTM transmission mechanism in the prior art.

It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and other division methods may be used in actual implementation. In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a processor-readable storage medium. Based on this understanding, the technical solutions of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, and the computer software products are stored in a storage medium , including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

It should be noted here that the above-mentioned device provided in the embodiment of the present application can realize all the method steps realized by the above-mentioned method embodiment, and can achieve the same technical effect, which is not the same as the method embodiment in this embodiment. The parts and beneficial effects will be described in detail.

As shown in FIG. 5 , an embodiment of the present application further provides a network device, including a memory 520, a transceiver 540, and a processor 510;

a memory 520 for storing computer programs;

a transceiver 540 for receiving and transmitting data under the control of the processor 510;

The processor 510 is configured to read the computer program in the memory 520 and perform the following operations:

Receive target information sent by a core network element, and obtain a first state parameter included in the target information; the first state parameter includes a data stream identifier and a first sequence number; the first sequence number is the core network network The sequence number corresponding to the transmission order in which the element transmits the first data packet via the target transmission interface;

According to the first sequence number, a second state parameter of the target data stream corresponding to the data stream identifier is generated; the second state parameter indicates the count value of the data packets of the target data stream transmitted by the core network element ;

A third state parameter of the target radio bearer corresponding to the target data stream is updated; the third state parameter indicates the count value of the data packets carried by the target radio bearer.

Optionally, in this embodiment of the present application, the processor 510 is configured to:

When the second data packet is sent through the air interface bearer, a second sequence number is carried; the second sequence number is determined by the third state parameter corresponding to the air interface bearer.

Optionally, in this embodiment of the present application, the generating the second state parameter of the target data stream corresponding to the data stream identifier according to the first sequence number includes:

Using the first sequence number as the second state parameter of the target data stream corresponding to the data stream identifier; or

The first serial number is added by one, or the first serial number is added by one and then modulo the preset serial number threshold to obtain the second state parameter of the target data stream corresponding to the data stream identifier.

Optionally, in this embodiment of the present application, the acquiring the first state parameter carried in the target information includes:

Obtain the data stream identifier and the initial first sequence number carried in the target information, use the data stream identifier as the data stream identifier of the first state parameter, and use the initial first sequence number as the data stream identifier of the first state parameter the first sequence number of the first state parameter, or

Obtain the data stream identifier and the fourth sequence number carried in the target information, use the data stream identifier as the data stream identifier of the first state parameter, and use the fourth sequence number and the third state parameter as the data stream identifier. The first sequence number of the first state parameter is generated.

Optionally, in this embodiment of the present application, the target information includes the first data packet or synchronization information.

Optionally, in this embodiment of the present application, the updating of the third state parameter of the target radio bearer corresponding to the target data flow includes:

determining a target radio bearer corresponding to the target data flow;

The second state parameter corresponding to the data stream carried by the target radio bearer is summed to obtain the third state parameter of the target radio bearer.

5, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors 510 represented by processor 510 and various circuits of memory 520 represented by memory 520 are linked together. The bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further herein. The bus interface 530 provides the interface. Transceiver 540 may be multiple elements, ie, including transmitters and receivers, providing means for communicating with various other devices over transmission media including wireless channels, wired channels, fiber optic cables, and the like. The processor 510 is responsible for managing the bus architecture and general processing, and the memory 520 may store data used by the processor 510 in performing operations.

The processor 510 may be a central processor (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or a complex programmable logic device (Comple5 Programmable Logic Device, CPLD), the processor 510 may also adopt a multi-core architecture.

The processor 510 is configured to execute any one of the methods provided by the embodiments of the present application according to the obtained executable instructions by invoking the computer program stored in the memory 520 . The processor 510 and the memory 520 may also be arranged physically separately.

As shown in FIG. 6 , an embodiment of the present application further provides a terminal, including a memory 620, a transceiver 640, and a processor 610;

a memory 620 for storing computer programs;

a transceiver 640 for receiving and transmitting data under the control of the processor 610;

The processor 610 is configured to read the computer program in the memory 620 and perform the following operations:

Sending target information to the access network element, where the target information carries the first state parameter of the first data packet, so that the access network element generates a target data stream corresponding to the data stream identifier according to the first sequence number and update the third state parameter of the target radio bearer corresponding to the target data stream;

Wherein, the first state parameter includes a data stream identifier corresponding to the first data packet and a first sequence number; the first sequence number is the transmission of the first data packet transmitted by the core network element via the target transmission interface The sequence number corresponding to the order;

The second state parameter indicates the count value of the data packets of the target data flow transmitted by the core network element; the third state parameter indicates the number of data packets carried by the target radio bearer.

Optionally, in this embodiment of the present application, the target information includes the first data packet or synchronization information.

6, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors 610 represented by processor 610 and various circuits of memory 620 represented by memory 620 are linked together. The bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further herein. The bus interface 630 provides the interface. Transceiver 640 may be a number of elements, including a transmitter and a receiver, that provide means for communicating with various other devices over transmission media including wireless channels, wired channels, fiber optic cables, and the like. The processor 610 is responsible for managing the bus architecture and general processing, and the memory 620 may store data used by the processor 610 in performing operations.

The processor 610 may be a central processor (CPU), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or a complex programmable logic device (Comple6 Programmable Logic Device, CPLD), the processor 610 may also adopt a multi-core architecture.

The processor 610 is configured to execute any one of the methods provided by the embodiments of the present application according to the obtained executable instructions by calling the computer program stored in the memory 620 . The processor 610 and the memory 620 may also be arranged physically separately.

It should be noted here that the above-mentioned device provided in the embodiment of the present application can realize all the method steps realized by the above-mentioned method embodiment, and can achieve the same technical effect, which is not the same as the method embodiment in this embodiment. The parts and beneficial effects will be described in detail.

Embodiments of the present application further provide a processor-readable storage medium, where a computer program is stored in the processor-readable storage medium, and the computer program is used to cause the processor to execute a state parameter processing method.

The processor-readable storage medium can be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic storage (eg, floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical storage (eg, CD, DVD, BD, HVD, etc.), and semiconductor memory (eg, ROM, EPROM, EEPROM, non-volatile memory (NANDFLASH), solid-state disk (SSD)), and the like.

As will be appreciated by those skilled in the art, the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media having computer-usable program code embodied therein, including but not limited to disk storage, optical storage, and the like.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block in the flowcharts and/or block diagrams, and combinations of flows and/or blocks in the flowcharts and/or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These processor-executable instructions may also be stored in a processor-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the processor-readable memory result in the manufacture of means comprising the instructions product, the instruction means implements the functions specified in the flow or flow of the flowchart and/or the block or blocks of the block diagram.

These processor-executable instructions can also be loaded onto a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process that Execution of the instructions provides steps for implementing the functions specified in the flowchart or blocks and/or the block or blocks of the block diagrams.

Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims (19)

1. A state parameter processing method is applied to an access network element and is characterized by comprising the following steps:

receiving target information sent by a core network element, and acquiring a first state parameter included in the target information; the first state parameter comprises a data flow identification and a first sequence number; the first sequence number is a sequence number corresponding to a transmission order in which the core network element transmits the first data packet through the target transmission interface;

generating a second state parameter of the target data stream corresponding to the data stream identification according to the first sequence number; the second state parameter indicates a count value of a data packet of the target data stream transmitted by the core network element;

updating a third state parameter of a target radio bearer corresponding to the target data stream; the third state parameter indicates a count value of data packets carried by the target radio bearer.

2. The state parameter processing method according to claim 1, wherein the method comprises:

carrying a second serial number when sending a second data packet through an air interface bearer; the second sequence number is determined by the third state parameter corresponding to the air interface bearer.

3. The method according to claim 1, wherein the generating a second state parameter of a target data flow corresponding to a data flow identifier according to the first sequence number includes:

the first sequence number is used as a second state parameter of the target data flow corresponding to the data flow identification; or

And adding one to the first serial number, or adding one to the first serial number and then performing modulo processing with a preset serial number threshold value to obtain a second state parameter of the target data stream corresponding to the data stream identifier.

4. The state parameter processing method according to claim 1, wherein the acquiring the first state parameter carried in the target information includes:

acquiring a data stream identifier and an initial first sequence number carried in the target information, using the data stream identifier as the data stream identifier of the first state parameter, and using the initial first sequence number as the first sequence number of the first state parameter, or

And acquiring a data stream identifier and a fourth sequence number carried in the target information, using the data stream identifier as the data stream identifier of the first state parameter, and generating the first sequence number of the first state parameter according to the fourth sequence number and a third state parameter.

5. The state parameter processing method according to claim 1, wherein the destination information includes the first packet or synchronization information.

6. The method of claim 1, wherein the updating the third state parameter of the target radio bearer corresponding to the target data flow comprises:

determining a target radio bearer corresponding to the target data flow;

and summing the second state parameters corresponding to the data stream carried by the target radio bearer to obtain a third state parameter of the target radio bearer.

7. A state parameter processing method is applied to a core network element, and is characterized by comprising the following steps:

sending target information to an access network element, wherein the target information carries a first state parameter of a first data packet, so that the access network element generates a second state parameter of a target data stream corresponding to a data stream identifier according to a first serial number, and updates a third state parameter of a target radio bearer corresponding to the target data stream;

the first state parameter comprises a data stream identifier and a first sequence number corresponding to the first data packet; the first sequence number is a sequence number corresponding to a transmission order in which the core network element transmits the first data packet through the target transmission interface;

the second state parameter indicates a count value of a data packet of the target data stream transmitted by the core network element; the third state parameter indicates the number of data packets carried by the target radio bearer.

8. The state parameter processing method according to claim 7, wherein the destination information includes the first packet or synchronization information.

9. A network device comprising a memory, a transceiver, a processor:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following operations:

receiving target information sent by a core network element, and acquiring a first state parameter included in the target information; the first state parameter comprises a data flow identification and a first sequence number; the first sequence number is a sequence number corresponding to a transmission order in which the core network element transmits the first data packet through the target transmission interface;

generating a second state parameter of the target data stream corresponding to the data stream identification according to the first sequence number; the second state parameter indicates a count value of a data packet of the target data stream transmitted by the core network element;

updating a third state parameter of a target radio bearer corresponding to the target data stream; the third state parameter indicates a count value of data packets carried by the target radio bearer.

10. The network device of claim 9, wherein the processor is configured to:

carrying a second serial number when sending a second data packet through an air interface bearer; the second sequence number is determined by the third state parameter corresponding to the air interface bearer.

11. The network device of claim 9, wherein the generating the second state parameter of the target data flow corresponding to the data flow identifier according to the first sequence number comprises:

the first sequence number is used as a second state parameter of the target data flow corresponding to the data flow identification; or

And adding one to the first serial number, or adding one to the first serial number and then performing modulo processing with a preset serial number threshold value to obtain a second state parameter of the target data stream corresponding to the data stream identifier.

12. The network device of claim 9, wherein the obtaining the first state parameter carried in the target information comprises:

acquiring a data stream identifier and an initial first sequence number carried in the target information, using the data stream identifier as the data stream identifier of the first state parameter, and using the initial first sequence number as the first sequence number of the first state parameter, or

And acquiring a data stream identifier and a fourth sequence number carried in the target information, using the data stream identifier as the data stream identifier of the first state parameter, and generating the first sequence number of the first state parameter according to the fourth sequence number and a third state parameter.

13. The network device of claim 9, wherein the destination information comprises the first packet or synchronization information.

14. The network device of claim 9, wherein the updating the third state parameter of the target radio bearer corresponding to the target data flow comprises:

determining a target radio bearer corresponding to the target data flow;

and summing the second state parameters corresponding to the data stream carried by the target radio bearer to obtain a third state parameter of the target radio bearer.

15. A network device comprising a memory, a transceiver, a processor:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following operations:

sending target information to an access network element, wherein the target information carries a first state parameter of a first data packet, so that the access network element generates a second state parameter of a target data stream corresponding to a data stream identifier according to a first serial number, and updates a third state parameter of a target radio bearer corresponding to the target data stream;

wherein the first state parameter includes the data flow identifier and the first sequence number corresponding to the first packet; the first sequence number is a sequence number corresponding to a transmission order of a first data packet transmitted by a core network element through a target transmission interface;

the second state parameter indicates a count value of a data packet of the target data stream transmitted by the core network element; the third state parameter indicates the number of data packets carried by the target radio bearer.

16. The network device of claim 15, wherein the destination information comprises the first packet or synchronization information.

17. A state parameter processing device applied to an access network element is characterized by comprising:

the information receiving module is used for receiving target information sent by a core network element and acquiring a first state parameter included in the target information; the first state parameter comprises a data flow identification and a first sequence number; the first sequence number is a sequence number corresponding to a transmission order in which the core network element transmits the first data packet through the target transmission interface;

the parameter generation module is used for generating a second state parameter of the target data stream corresponding to the data stream identifier according to the first serial number; the second state parameter indicates a count value of a data packet of the target data stream transmitted by the core network element;

a parameter updating module, configured to update a third state parameter of a target radio bearer corresponding to the target data stream; the third state parameter indicates a count value of data packets carried by the target radio bearer.

18. A state parameter processing device applied to a core network element is characterized by comprising:

an information sending module, configured to send target information to an access network element, where the target information carries a first state parameter of a first data packet, so that the access network element generates, according to a first sequence number, a second state parameter of a target data stream corresponding to a data stream identifier, and updates a third state parameter of a target radio bearer corresponding to the target data stream;

wherein the first state parameter includes the data flow identifier and the first sequence number corresponding to the first packet; the first sequence number is a sequence number corresponding to a transmission order of a first data packet transmitted by a core network element through a target transmission interface;

the second state parameter indicates a count value of a data packet of the target data stream transmitted by the core network element; the third state parameter indicates the number of data packets carried by the target radio bearer.

19. A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program for causing a processor to perform the method of any one of claims 1 to 8.

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