WO2012061980A1

WO2012061980A1 - Method and apparatus for transmitting data packets

Info

Publication number: WO2012061980A1
Application number: PCT/CN2010/078567
Authority: WO
Inventors: 银宇; 蔡慧
Original assignee: 华为技术有限公司
Priority date: 2010-11-09
Filing date: 2010-11-09
Publication date: 2012-05-18
Also published as: CN102656848B; CN102656848A

Abstract

The embodiments of the present invention relate to a method and an apparatus for transmitting data packets. The method includes: receiving a data packet and obtaining the flow credit of the data flow to which the data packet belongs, wherein the flow credit increases according to the increase rate of the flow credit; according to the correspondence between the flow credit of the data flow and the control information of the data flow, obtaining the control information of the data flow corresponding to the flow credit of the data flow; transmitting the data packet according to the control information of the data flow, and consuming the flow credit corresponding to the data packet.

Description

Data packet transmission method and device

The embodiments of the present invention relate to communication technologies, and in particular, to a data packet transmission method and apparatus. Background technique

The Fair Usage Policy (FUP) method is a fair flow control method that records and accumulates the cumulative usage traffic of the terminal during the current control period (for example: this month) during the transmission of the data stream of the terminal. And update the rate control policy when the cumulative usage traffic exceeds the quota, for example: Reduce the maximum allowed transmission rate, thereby preventing a small number of terminals from occupying too much network resources.

The FUP method is a large-scale flow control method. At the beginning of each control cycle (for example, at the beginning of each month), since the cumulative usage traffic of the terminal is less than the quota, a larger maximum transmission rate can be obtained, and Since the end user knows that the accumulated usage traffic at this time is still far from the quota, it is more convenient to use various services (for example, file download, video, etc.), so it may still be serious at the beginning of each control cycle. Network congestion affects the normal operation of the service; at the end of each control cycle (for example, at the end of each month), since the cumulative usage traffic of some terminals has exceeded the quota, only a small maximum transmission can be obtained. The rate, and those end users who have not exceeded the quota, consciously restrict the use of various services due to the pressure of quotas. Therefore, the network load may be insufficient at the end of each control cycle, resulting in the network resources being unable to be effectively utilized. Summary of the invention

The embodiment of the present invention provides a method and a device for transmitting a data packet, which are used to prevent a small number of terminals from occupying excessive network resources, and to prevent the normal operation of the service caused by network congestion at the beginning of the control period in the FUP method. At the end of the control cycle, due to network load The waste of network resources caused by the foot, improve the business success rate and utilization of network resources. An embodiment of the present invention provides a data packet transmission method, including:

Receiving a data packet, obtaining a traffic credit of the data flow to which the data packet belongs, and the traffic credit of the data flow is increased according to an increase rate of the traffic credit;

Obtaining control information of the data flow corresponding to the traffic credit of the data flow according to the correspondence between the traffic credit of the data stream and the control information of the data flow;

And transmitting, according to the control information of the data stream, the data packet, and consuming the traffic credit corresponding to the data packet.

An embodiment of the present invention further provides a data packet transmission apparatus, including:

a traffic credit increasing module, configured to increase a traffic flow of the data flow according to an increase rate of the traffic credit;

a traffic credit obtaining module, configured to receive a data packet of the data stream, and obtain a traffic credit of the data stream;

a control information obtaining module, configured to acquire, according to a correspondence between the traffic credit of the data stream and the control information of the data flow, control information of the data flow corresponding to the traffic credit of the data flow;

And a transmission rate control module, configured to: according to the control information of the data stream, transmit the data packet, and consume a traffic credit corresponding to the data packet.

According to the foregoing technical solution, the embodiment of the present invention obtains the traffic credit corresponding to the traffic credit of the data stream according to the correspondence between the traffic credit of the data flow and the control information of the data flow by acquiring the traffic credit of the data flow to which the data packet belongs. The control information enables the transmission of the data packet according to the control information of the data stream, and consumes the traffic credit corresponding to the data packet, thereby realizing the control of the transmission rate of the data stream, and suppressing a small number of terminals occupying too many networks. Resources, while avoiding the failure of the FUP method due to network congestion caused by network congestion at the beginning of the control period, and the waste of network resources due to insufficient network load at the end of the control period, thereby improving the service success rate. And utilization of network resources. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic flowchart of a data packet transmission method according to Embodiment 1 of the present invention; FIG. 2 is a schematic flowchart of a data packet transmission method according to Embodiment 2 of the present invention; FIG. 4 is a schematic structural diagram of a data packet transmission apparatus according to Embodiment 4 of the present invention; FIG. 5 is another schematic structural diagram of a data packet transmission apparatus according to Embodiment 4 of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

FIG. 1 is a schematic flowchart of a method for transmitting a data packet according to Embodiment 1 of the present invention. As shown in FIG. 1, the data packet transmission method in this embodiment may include the following steps:

Step 101: Receive a data packet, and obtain a traffic credit of the data flow to which the data packet belongs. The traffic credit may be understood as a certificate that the service session (data flow) has, which can transmit the data packet with a higher priority. For example: higher control rate, higher scheduling weight, higher priority transmission priority identifier, etc. The unit is the same as the unit of traffic (bytes, kilobytes, etc.), and can save data in the context of the data stream. Flow traffic credit. After the service session of the terminal is established, the new traffic credit is continuously increased at the rate of increase of the preset traffic credit; when the data packet of the data stream is transmitted, the traffic credit of the data stream is consumed (deducted or not deducted) The traffic credit corresponding to the data packet; when there is no data packet transmission or the data stream transmission rate is lower, lower than When the rate of increase of the traffic credit is increased, the traffic credit of the data stream can be continuously increased, but the traffic credit of the data flow has an upper limit value, that is, the maximum traffic credit, and the accumulated traffic credit reaches the upper limit value, and the traffic credit does not increase any more. . Specifically, before the step, the step of acquiring the transmission control parameter may be further included, and the network element may be sent from another network element (which may be referred to as a parameter sending network element in the embodiment of the present invention), for example, the interface and the charging rule ^A network element such as a Policy and Charging Rules Function (PCRF) or a Mobility Management Entity (MME) is obtained, or can be obtained from operation and maintenance or its own configuration information. The foregoing transmission control parameters may include, but are not limited to, the following parameters: a correspondence between the traffic credit and the control rate and an increase rate of the traffic credit. Further, the foregoing transmission control parameter may further include a maximum traffic credit and/or an initial traffic credit, and when the context of the data flow is initialized, a certain amount of initial traffic credits (eg, 5M Bytes) may be set (allocated) for the data flow, and Traffic credits continue to increase at an increasing rate of traffic credits. If the traffic credit of the data stream exceeds the maximum traffic credit of the data stream (for example: 20M Bytes), the traffic credit does not continue to increase. That is to say, the traffic credit of a data stream has an upper limit value, that is, a maximum traffic credit.

Specifically, the granularity of the data flow controlled by different execution entities performing this step may be different, and the granularity may be larger than one terminal or less than one terminal. E.g:

Traffic aggregation for several terminals (for example: belonging to a subnet);

Traffic aggregation of a terminal;

Traffic aggregation of a packet of a terminal that meets certain matching conditions, for example: traffic aggregation carried by all non-guaranteed bit rates (Non-GBR) of a terminal;

Traffic aggregation of a Public Data Network (PDN) connection of a terminal;

Traffic aggregation of a packet in a PDN connection of a terminal that meets certain matching conditions, for example: traffic aggregation of a Non-GBR bearer in a PDN connection of a terminal;

Traffic aggregation of a specified one or more service data flows of a terminal; Traffic aggregation of a non-specific service data stream of a terminal other than the specified one or more service data streams;

Traffic aggregation of one or more service data flows specified in a PDN connection of a terminal; traffic aggregation of a non-specific service data flow other than the specified one or more service data flows in a PDN connection of one terminal;

Traffic aggregation of all PDN connections belonging to the same Access Point Name (APN) of a terminal.

Specifically, this step may specifically obtain the traffic credit of the data flow from the context of the data flow. Step 102: Obtain control information of the data flow corresponding to the traffic credit of the data flow according to the correspondence between the traffic credit of the data flow and the control information of the data flow;

The control information of the data stream may include, but is not limited to, at least one of the following information: a control rate of the data stream, a scheduling weight of the data stream, and a transmission priority identifier of the data stream, for example: a differentiated service code point (Differentiated Services Code) Point, referred to as DSCP). It can be understood that: the control information of the above data stream may also be other related parameters of other technical means capable of differentially controlling the transmission rate of the data stream.

Specifically, the correspondence between the traffic credit of the data stream and the control rate of the data flow may be established according to a control policy, for example, the higher the traffic credit of the data flow, the higher the control rate of the data flow, and vice versa, the more the traffic credit of the data flow The lower the control rate of the data stream is. The similarity between the traffic credit of the data stream and the scheduling weight of the data stream can be established according to the control policy. For example, the higher the traffic credit of the data stream, the more the scheduling weight of the data stream is. Large, conversely, the lower the traffic credit of the data stream, the smaller the scheduling weight of the data stream; similarly, the correspondence between the traffic credit of the data stream and the transmission priority identifier of the data stream can be established according to the control policy, for example: data flow The higher the traffic credit, the higher the priority of the transmission priority identifier of the data packet.

Step 103: Transmit the data packet according to the control information of the data stream, and consume the traffic credit corresponding to the data packet.

Specifically, if the transmission rate of the data stream does not exceed the control rate of the data stream, To allow the above data packets to pass, and deduct the traffic credit corresponding to the data packet from the traffic credit of the data stream, for example: deduct the traffic credit corresponding to the length of the data packet (if the traffic credit of the data flow is insufficient to deduct Generally, the data packet is not allowed to pass and does not consume the corresponding traffic credit. However, in the specific implementation, it is also considered to allow the credit credit to be owed, that is, in the case of insufficient traffic credit, the data packet is allowed to pass as long as the control rate of the data flow is not exceeded. On the contrary, the above data packet may not be allowed to pass, and the traffic credit corresponding to the data packet is not deducted from the traffic credit of the data stream, thereby realizing that the transmission rate of the data stream can be controlled to be less than or equal to (ie, not Exceeding the control rate of the above data stream. There are several ways: directly discarding data packets that are not allowed to pass; caching processing of data packets that are not allowed to pass; performing Differentiated Services Code Point (DSCP) degraded token processing on data packets that are not allowed to pass. .

Optionally, the step may further transmit the received data packet according to a scheduling weight of the data flow corresponding to the traffic credit of the data flow, and deduct the traffic credit corresponding to the data packet from the traffic credit of the data flow; or The data packet may also be transmitted, and the data packet is marked with a transmission priority identifier corresponding to the traffic credit of the data stream, and the traffic credit corresponding to the data packet is deducted from the traffic credit of the data stream.

In this embodiment, for a service with a long transmission duration such as file downloading and video, since the accumulated traffic credit is quickly consumed at a higher transmission rate, the data stream can only be transmitted at a lower transmission rate. Transmission, to avoid such services continue to occupy excessive bandwidth; and for short-lived services such as web browsing, e-mail, instant messaging, etc., because their traffic credits are always maintained at a high level, in such services When the data transmission occurs, the data stream can be transmitted at a higher rate, so that the end user obtains a better experience. However, from a longer period of time, the average rate of transmission of both types of services is limited by the speed at which traffic credits increase, thus embodying fairness. For the rate limitation of services such as file downloading and video, controlling the transmission rate according to the traffic credit of the data stream does not only limit the current bandwidth consumption of its terminal. In addition, due to traffic The setting of the rate of increase of credit is generally set according to the traffic model and network capability of the terminal, and the average rate of data stream transmission is limited by the rate of increase of the traffic credit, so the transmission rate of the traffic is controlled according to the traffic credit of the data stream. The effect is also that it can control the terminal to use the traffic of its package more reasonably, avoiding the traffic usage at the beginning of the control cycle is too fast, and the traffic at the end of the control cycle exceeds the quota.

In this embodiment, by acquiring the traffic credit of the data flow to which the data packet belongs, the control information of the data flow corresponding to the traffic credit of the data flow is obtained according to the correspondence between the traffic credit of the data flow and the control information of the data flow, so that the control information of the data flow corresponding to the traffic credit of the data flow is obtained. Transmitting the data packet according to the control information of the data stream, and consuming the traffic credit corresponding to the data packet, thereby controlling the transmission rate of the data stream, and suppressing a small number of terminals from occupying excessive network resources, and avoiding In the FUP method, the service caused by network congestion at the beginning of the control period cannot be performed normally, and the network resources are wasted due to insufficient network load at the end of the control period, thereby improving the service success rate and the utilization of network resources. rate.

The data packet transmission method in this embodiment can be applied to various networks, for example, a Universal Mobile Telecommunication System (UMTS) network, an Evolved Packet System (EPS) network, and global microwave access. Interoperability for Microwave Access (WiMAX) network, Code Division Multiple Access (CDMA) network, Asymmetric Digital Subscriber Line (ADSL) network, fiber access network , IP backbone network, LAN, etc.

The executor of the embodiment may be a base station (NodeB), a radio network controller (RNC), and a general packet radio service (GPRS) support node in the UMTS network (Serving) The GPRS Supporting Node (SGSN), the Gateway General Packet Radio Service (GPRS) Supporting Node (GGSN), etc., may also be an evolved NodeB (Evolved NodeB) in the EPS network. Referred to as eNB), Serving Gateway (S-GW), Packet Data Network Gateway (P-GW), etc., it can also be a base station (BS) in the WiMAX network. The Access Service Network Gateway (ASN-GW) and the Home Agent (HA) may also be Packet Data Serving Nodes (PDSNs) and HAs in the CDMA network. It can also be a Broadband Remote Access Server (BRAS) in an ADSL network, an IP backbone network, a router in a local area network, or a wired terminal or mobile terminal in various communication networks. The access point (AP) is not limited in this embodiment of the present invention.

For convenience of description, in the following embodiments of the present invention, a network element is used as a generality of a rate control execution subject, and a network element can save a traffic credit of a data stream in the context of a data stream. Specifically, when the context of the data stream is initialized, the network element may allocate a certain amount of initial traffic credits (for example, 5 M Bytes) to the data stream, and at the same time, the network element may increase the traffic credit of the foregoing data stream according to the rate of increase of the traffic credit. If the traffic credit of the data stream exceeds the maximum traffic credit of the data stream (for example: 20M Bytes), the traffic credit no longer continues to increase. That is to say, the traffic credit of a data stream has an upper limit value, that is, the maximum traffic credit.

It can be understood that, in the embodiment of the present invention, different transmission control parameters may be separately set for the uplink and downlink directions. Of course, the same control parameters may be set for the uplink and downlink. In general, the greater the maximum traffic credit, or the more initial traffic credits, or the faster the rate of increase in traffic credits, the higher the control rate allowed for the same traffic credits (especially in the case of traffic credit exhaustion) The higher the rate, the better the end user's business experience. Therefore, different transmission control parameters can be set according to different situations, for example:

A. According to the type of end user in the contract data, set a large maximum traffic credit for the gold terminal user, or more initial traffic credit, or a faster rate of increase of traffic credit, or the same traffic credit situation. Allowing a higher control rate, or a larger scheduling weight, or a higher priority transmission priority identifier; B. According to the packet data network (PDN) accessed by the terminal identified by the Access Point Name (APN), a larger maximum traffic credit is set for the service controlled by the operator, or more The initial traffic credit, or the rate of increase of the faster traffic credit, or the same traffic credit allows a higher control rate, or a larger scheduling weight, or a higher priority transmission priority identifier;

c. Depending on the time period of the network, during the idle period of the network, set a larger maximum traffic credit for the terminal, or more initial traffic credits, or a faster rate of increase of traffic credits, or the same traffic credit situation. Allows a higher control rate, or a larger scheduling weight, or a higher priority transmission priority identifier.

Specifically, the correspondence between the traffic credit of the data stream and the control rate of the data flow may be set according to the current traffic credit of the data flow, for example:

A. When the current traffic credit is greater than or equal to 50% of the maximum traffic credit, the control rate of the data flow (that is, the maximum transmission rate of the allowed data stream) is 512 Kbps;

B. When the current traffic credit is greater than or equal to 10% of the maximum traffic credit and less than 50% of the maximum traffic credit, the control rate of the data flow (that is, the maximum transmission rate of the allowed data flow) is

256Kbps;

C. When the current traffic credit is less than 10% of the maximum traffic credit, the control rate of the data stream (that is, the maximum transmission rate of the allowed data stream) is 80 Kbps.

Similarly, the correspondence between the traffic credit of the data stream and the scheduling weight of the data stream can be set according to the current traffic credit of the data flow, for example:

A. When the current traffic credit is greater than or equal to 50% of the maximum traffic credit, the scheduling weight of the data flow is 6;

B. When the current traffic credit is greater than or equal to 10% of the maximum traffic credit and less than 50% of the maximum traffic credit, the scheduling weight of the data flow is 3;

C. When the current traffic credit is less than 10% of the maximum traffic credit, the scheduling weight of the data flow is 1. Similarly, the correspondence between the traffic credit of the above data stream and the transmission priority identifier of the data stream It can be set according to the current traffic credit of the data stream, for example:

A. When the current traffic credit is greater than or equal to 50% of the maximum traffic credit, the data packet DSCP is marked as AF21 (ie, ensure forwarding 21);

B. When the current traffic credit is greater than or equal to 10% of the maximum traffic credit and less than 50% of the maximum traffic credit, the data packet DSCP is marked as AF11 (ie, forwarding is guaranteed 11);

C. When the current traffic credit is less than 10% of the maximum traffic credit, the data packet DSCP is marked as BE (ie, try to forward).

It should be noted that, in the foregoing description of the embodiment, the corresponding relationship between the traffic credit of the data flow and the control rate/scheduling weight/transmission priority identifier of the data flow is described in a relative proportion manner. It can also be described by using absolute values or other equivalent means, and the invention does not limit this, for example:

A. When the current traffic credit is greater than or equal to 10M Bytes, the control rate of the data stream (that is, the maximum transmission rate of the allowed data stream) is 512 Kbps;

B. When the current traffic credit is greater than or equal to 2M Bytes and less than 10M Bytes, the control rate of the data stream (that is, the maximum transmission rate of the allowed data stream) is 256Kbps;

C. When the current traffic credit is less than 2M Bytes, the control rate of the data stream (that is, the maximum transmission rate of the allowed data stream) is 80Kbps.

In this embodiment, the correspondence between the traffic credit and the control information of the data stream embodies a control idea of hierarchical control: that is, as the consumption of traffic credit decreases, the control rate, scheduling weight, or transmission priority identifier of the data stream corresponds to The transmission priority gradually gradually and gradually decreases, and as the traffic credit recovery increases, the transmission priority, the scheduling weight, or the transmission priority corresponding to the transmission priority of the data stream gradually rises gradually. In the above-mentioned correspondence relationship in the embodiment, in addition to enabling a service such as web browsing, e-mail, and instant messaging to obtain a high peak bandwidth, the terminal can also control the bandwidth of the terminal according to the actual bandwidth capability of the network.

From the early access to the network through modems, GPRS and other technologies, the rate that the terminal can reach is about tens of Kbps, and the latest asymmetric digital subscriber line (Asymmetric Digital Subscriber Line, ADSL for short), optical fiber, high-speed packet access (HSPA), WiMAX, LTE and other access technologies provide transmission rates of several Mbps or higher, and basic packet services are not available. Big changes, such as: web browsing, email, file downloading, etc. As the transmission rate increases, the service experience of the end user becomes more and more smooth. In other words, as the transmission rate decreases while the network is congested, although the service experience of the end user is reduced, as long as the bandwidth obtained by the terminal is higher than With a certain threshold, basic packet services can be performed, thus ensuring a basic service experience.

It can be understood that: the higher the transmission rate obtained by the terminal, the more the end user can browse more web pages per unit time, or download more files, that is, the more traffic the end user uses in a unit time; otherwise, the terminal Users can browse fewer web pages per unit of time, or download fewer files, ie less traffic that end users use per unit of time. That is to say, as the transmission rate of the data stream decreases, the end user inserts more "waiting time" when enjoying the service, for example: waiting for the webpage transmission to be completed, waiting for the file to be downloaded, etc.; waiting for the original service When the request is completed, the end user generally initiates a new service request less, that is, the extension of the waiting time may cause the terminal user to unconsciously reduce the frequency of the initiation of the new service request, so the existence of the waiting time actually reduces the unit time. Traffic used by end users. As the transmission rate decreases to a certain extent, the traffic used by the end user in a unit time is reduced, but the user's service experience (ie, satisfaction) can still be basically accepted. We call the "elasticity" of the packet service bandwidth requirement.

In the embodiment of the present invention, in addition to controlling the average rate upper limit that the data stream can reach by the parameter of the rate of increase of the traffic credit, according to the network capability and the like, the traffic credit and the data flow control information of the hierarchical data stream are reasonably set. The corresponding relationship can make the service waiting time of the end user gradually prolong, and the frequency of the new user starting the new service is appropriately reduced (equivalent to the user voluntarily giving up the initiation of a part of the service in exchange for the smoothness of the currently ongoing service), and finally obtained by the terminal. The bandwidth can meet the requirements of the ongoing service of the end user relatively well, so as to achieve the dynamic balance between the service experience of the end user and the traffic used, avoiding the traditional flow control method or not controlling the rate or according to the maximum rate. Control, either at a small rate The deficiencies of punitive slowdowns (eg, the FUP approach) provide a better service experience for end users under the same bandwidth conditions.

It should be noted that: the foregoing transmission control parameters may be fixed during the transmission of the data stream, or may be dynamically changed. Specifically, the transmission control parameter may be dynamically adjusted by some event triggering, for example: adjusting the transmission control parameter according to the change of the network load (reducing the rate of increase of the traffic credit of the terminal when the network is under heavy load); The change of the segment, adjusting the transmission control parameter (reducing the rate of increase of the traffic credit of the terminal when the network is in a busy period; increasing the rate of increase of the traffic credit of the terminal when the network is in the idle period); or The service dynamically adjusts the transmission control parameters, for example: After detecting that the terminal clicks on a paid song, it adds 5M Bytes of traffic credit to the terminal's data stream to speed up the terminal downloading the song; and detects that the terminal has started peer-to-peer (Peer-to- Peer, referred to as P2P), when downloading, reduce the traffic credit to 0 to avoid excessive bandwidth consumed by P2P download traffic.

Further, the foregoing transmission control parameter may be statically configured on a network element that performs rate control, or may also be implemented by a policy decision entity, for example, a Policy and Charging Rule Function (PCRF) The controlled network element is delivered.

The technical solution of the present invention will be described in detail below by taking the P-GW in the EPS network as an example. 2 is a schematic flowchart of a method for transmitting a data packet according to Embodiment 2 of the present invention. As shown in FIG. 2, the data packet transmission method in this embodiment may include the following steps:

Step 201: In the attach procedure or the PDN connection process initiated by the user equipment (UE), the UE initiates a default bearer activation process, and the S-GW sends a create session request message to the P-GW to establish a PDN connection.

Step 202: The P-GW interacts with the PCRF to establish a Gx interface session.

Step 203: The PCRF sends a session-related control parameter to the P-GW, where the session-related control parameter includes a transmission control parameter.

The transmission control parameter may include, but is not limited to, the following parameters: a correspondence between the traffic credit and the control rate, an initial traffic credit, an increase rate of the traffic credit, and a maximum traffic credit. specifically, For a detailed description of the transmission control parameters in this embodiment, refer to the related content in the first embodiment of the present invention, and details are not described herein again.

Specifically, the PCRF may set the transmission control parameter according to at least one of the subscription information of the terminal, the status information of the terminal, the location information of the terminal, the status information of the network, and the time information, and simultaneously set the transmission control parameter by using the parameter control policy, and The GW delivers the set transmission control parameters. If the PCRF does not send the transmission control parameters, or only part of the transmission control parameters are issued, the P-GW can use the default transmission control parameters to control the transmission rate of the data stream. Further, if the rate control is applied to a part of the service data flow in the PDN connection, the transmission control parameter may further include a controlled service data flow or characteristic information of multiple service data flows, for example: source IP address, destination IP address, protocol type, source port number, destination port number, Type of Service (ToS) / Differentiated Services Code Point (DSCP).

Further, the setting of the foregoing transmission control parameter may further be adjusted according to the accumulated usage flow rate of the terminal in the current control period. Specifically, as the accumulated usage traffic of the current control period increases, if the PCRF determines that the terminal has a tendency to consume the traffic quota too fast, the terminal sets a smaller maximum traffic credit, or less initial traffic credit, or lower. The rate of increase of traffic credit, or the same traffic credit allows for a lower control rate, the purpose of which is to help the terminal use the bandwidth more uniformly during the control period, avoiding the occurrence of accumulated traffic during the end of the control period. A situation in which traffic quotas are punitively slowed down.

Step 204: The P-GW returns a create session response message to the S-GW.

At this point, the PDN connection is established.

Step 205: The P-GW receives the data packet of the data stream in the PDN connection by using the established PDN connection, and controls the data stream transmission rate not to exceed the control rate of the data stream corresponding to the current traffic credit of the data stream.

Specifically, when the data packet arrives at the P-GW, it is determined whether the current transmission rate of the data flow will exceed the control rate of the data flow corresponding to the current traffic credit of the data flow, and if not, The data packet is passed, and the traffic credit corresponding to the data packet is consumed from the current traffic credit of the data stream. Otherwise, the data packet is not allowed to pass, and the traffic credit is not consumed. Specifically, the P-GW may use a control method such as a token bucket or a leaky bucket to control the transmission rate of the data stream to be less than or equal to (ie, not exceed) the control rate of the data stream. It should be noted that: a control method using a token bucket or a leaky bucket allows a short-term burst, that is, a case where the transmission rate of the data stream exceeds the control rate of the data stream in a short period of time, which is in the embodiment of the present invention. Medium is allowed.

In particular, the P-GW may discard the data packet that is determined not to pass the control rate, or may also mark the IP header of the data packet with a special DSCP, after the data packet arrives at the eNodeB. The eNodeB can forward these data packets with special DSCP markings only when there is free bandwidth according to the current radio resource status, that is, apply a lower forwarding priority to these data packets.

In the following, another implementation manner of this step is described in detail by means of the transmission priority identifier. When the data packet arrives at the P-GW, the P-GW can also control the data by marking the data packet with a DSCP corresponding to different priorities. The transmission rate of the stream. Specifically, it may be: according to the transmission priority identifier of the data stream corresponding to the current traffic credit of the data flow, marking the DSCP corresponding to different priorities for the data packet, and deducting the traffic credit corresponding to the data packet from the current traffic credit of the data flow. . Packets marked as low-priority DSCP will have a greater probability of being dropped if they become congested during transmission. The upper layer protocol feedback effect caused by packet loss will reduce the rate of data stream.

Step 206: After the service is completed, the UE initiates a bearer deactivation process, and the S-GW sends a delete session request message to the P-GW.

Step 207: The P-GW interacts with the PCRF to delete the Gx interface session. Optionally, the P-GW may report the remaining traffic credits in the current data flow context to the PCRF, so as to send the transmission control to the P-GW next time. Reference information of the parameter, for example: If the remaining traffic credit is less when the terminal initiates the bearer deactivation process, and the UE quickly initiates the bearer activation process again, the PCRF can be based on the remaining P-GW reported last time. The traffic credit value is issued to the P-GW with less initial traffic credit to avoid the UE obtaining from repeated activation and deactivation. More initial traffic credits are improperly benefited.

Step 208: The P-GW returns a delete session response message to the S-GW.

In this embodiment, the P-GW obtains the traffic credit of the data flow to which the data packet belongs, and obtains the traffic credit corresponding to the data flow according to the correspondence between the traffic credit of the data flow and the control rate/transmission priority identifier of the data flow. The control rate/transmission priority identifier of the data stream enables the P-GW to transmit the data packet according to the control rate/scheduling weight of the data stream, and consumes the traffic credit corresponding to the data packet, thereby realizing the transmission of the data stream. The rate is controlled, which can prevent a small number of terminals from occupying too many network resources, and avoids the failure of the service in the FUP method due to network congestion at the beginning of the control period, and the network load is insufficient at the end of the control period. The resulting network resources are wasted, thereby improving the service success rate and the utilization of network resources.

The technical solution of the present invention is described in detail below by taking an eNodeB in an EPS network as an example. FIG. 3 is a schematic flowchart of a method for transmitting a data packet according to Embodiment 3 of the present invention. As shown in FIG. 3, the data packet transmission method in this embodiment may include the following steps:

Step 301: A user equipment (UE) in an idle state sends a service request (Service Request) message to the MME through the eNodeB, and is used to request to restore a radio access bearer (RAB).

Step 302: The MME sends an Initial Context Setup Request message to the eNodeB, where the initialization context setup request message includes a transmission control parameter. Because the eNodeB does not save the UE context when the UE is in an idle state, in this embodiment, The transmission control parameters required for the eNodeB to implement rate control by transmitting data packets are delivered by other network elements, such as the core network element (MME). The transmission control parameters may include, but are not limited to, the following parameters: a correspondence between the traffic credit and the control rate, an initial traffic credit, an increase rate of the traffic credit, and a maximum traffic credit. For a specific description of the transmission control parameters in this embodiment, refer to the related content in the first embodiment of the present invention, and details are not described herein again.

Similarly, the MME may be based on the subscription information of the terminal, the status information of the terminal, and the location of the terminal. At least one of information, network status information, time information, and cumulative usage traffic, and the transmission control parameters are set using a parameter control strategy.

In this embodiment, the granularity of the rate controlled data stream may include, but is not limited to, the following methods:

All traffic aggregation of the UE; one APN of the UE; traffic aggregation of one PDN connection of the UE; one RAB of the UE; traffic aggregation of the specified one or more service data flows of the UE, for example: All QCIs for the UE correspond to Non- Traffic aggregation of service data flows in a GBR type bearer. When the part of the service data stream of the UE is controlled, the MME will control the feature data of the service data stream, for example, the Quality of Service Class Identifier (QCI), the APN, the EPS bearer identifier (ID), and the source. The IP address, the destination IP address, the protocol type, the source port number, the destination port number, the service type (Type of Service, ToS), and the Differentiated Services Code Point (DSCP) are sent to the eNodeB.

Specifically, if the MME does not send the transmission control parameter to the eNodeB, or only part of the control parameter is sent, the eNodeB can apply the default control parameter for rate control.

Step 303: The eNodeB interacts with the UE to restore the RAB between the UE and the eNodeB. Step 304: The eNodeB returns an initialization context establishment to the MME (Initial Context)

Setup Complete ) message;

Step 305: The MME sends a Modify Bearer Request message to the S-GW to notify the establishment of the downlink RAB information to the eNodeB.

Step 306: The S-GW returns a Modify Bearer Response message to the MME.

At this point, the RAB between the UE and the network side is restored.

Step 307: The eNodeB receives the data packet of the data stream in the RAB by using the established RAB, and controls that the data stream transmission rate does not exceed the control rate of the data stream corresponding to the current traffic credit of the data stream.

For a specific control method, refer to the related description in Embodiment 1 of the present invention, and details are not described herein again. Further, the eNodeB does not have to discard the data packets that are determined not to be allowed to pass. Rather, it can be marked as low priority. After the packets of all terminals within the control rate range are preferentially guaranteed to pass, if there are still free bandwidth, these low priority packets can be transmitted to avoid the rate control. Waste network resources.

Since the radio access network has a richer means of packet scheduling than the core network, in addition to controlling the absolute transmission rate of the data stream according to the traffic credit, the relative scheduling weight of the data stream can be controlled according to the traffic credit. In the following, another implementation manner of this step is described in detail in the manner of scheduling weights. That is, the method for the eNodeB to obtain the control rate of the data stream corresponding to the current traffic credit of the data stream may be further replaced by the eNodeB to obtain the data stream. The scheduling weight of the data flow corresponding to the current traffic credit, for example: the data flow of the terminal with the same two parameters (for example: QCI), the default eNodeB uses the ratio of 1: 1 in the data flow of the two terminals The scheduling is performed, and after the traffic credit-based rate control method is introduced, different scheduling weights can be obtained according to the current traffic credit of the data stream of the terminal, for example: the current traffic credit is greater than or equal to 50% of the maximum traffic credit. The terminal may have a scheduling weight of 6. For a terminal whose current traffic credit quantity is greater than or equal to 10% of the maximum traffic credit and less than 50% of the maximum traffic credit, the scheduling weight may be 2, and the current traffic credit is less than 10 of the maximum traffic credit. % terminal, the scheduling weight can be 1, that is, the scheduling rights in the above three cases The weight ratio is 6: 2: 1 , and the data stream of the terminal with high scheduling weight will get a higher transmission rate under the same conditions. It should be noted that when the transmission rate of the data stream is controlled by the method of scheduling weights, the data packet of the transmission data stream also consumes the traffic credit corresponding to the data packet from the traffic credit of the data stream.

Step 308: After the service is completed, the eNodeB detects that the UE does not transmit the data stream within a period of time, and sends a UE context release request message to the MME.

Step 309: The MME sends a Modify Bearer Request message to the S-GW to notify the downlink RAB information that is released to the eNdoeB.

Step 31: The CK S-GW returns a Modify Bearer Response message to the MME.

Step 311: The MME sends a UE context release command to the eNodeB (S1 UE Context). Release Command) message, the notification releases the UE context;

Step 312: The eNodeB interacts with the UE to translate the RAB between the UE and the network side. Step 313: The eNodeB returns a S1 UE Context Release Complete message to the MME.

Similarly, the eNodeB may report the remaining traffic information in the context of the current data flow to the MME as the reference information for the MME to deliver the transmission control parameter when the UE is switched to the connected state again.

In this embodiment, the eNodeB acquires the traffic credit corresponding to the traffic credit of the data stream according to the traffic credit of the data flow to which the data packet belongs, and according to the correspondence between the traffic credit of the data flow and the control rate/scheduling weight of the data flow. The rate/scheduling weight enables the eNodeB to transmit the data packet according to the control rate/scheduling weight of the data stream, and consumes the traffic credit corresponding to the data packet, thereby implementing the control of the transmission rate of the data stream, and suppressing a small number of terminals. Occupying too much network resources, avoiding the inability of the service due to network congestion at the beginning of the control cycle in the FUP method, and the waste of network resources due to insufficient network load at the end of the control cycle, thereby improving Business success rate and utilization of network resources.

Several application scenarios applicable to the data packet transmission method provided by the foregoing embodiments of the present invention are described below:

1. Install a bandwidth management service program on the host (for example, a PC or a mobile terminal). The service program manages the bandwidth usage of the upper application in units of processes or process groups, such as a web browser process. The P2P download process and the E-Mail client process respectively perform rate control based on traffic credit. Since the data transmission process of the web browsing process and the email process is intermittent transmission, that is, transmission is performed for a period of time, and then the transmission is stopped for a period of time, so the transmission starts. Generally, more credits are accumulated, and a higher transmission rate can be obtained to improve the terminal experience of these foreground programs. In the background P2P download program, since the continuous transmission credit has been exhausted, the rate is controlled to be low. Level, avoiding the bandwidth resources of the foreground program. Similarly, packets that are determined not to pass do not have to be discarded, but can be marked as low priority, given priority. After ensuring that all processes have passed the packets within the control rate range, if there is still free bandwidth, these low priority packets can be transmitted to avoid wasting network resources due to flow control.

2. Perform rate-based traffic rate control on each connected terminal in the WiFi router to prevent congestion of the wireless LAN due to a small number of terminals starting P2P download, video, and the like.

3. On the egress router of the LAN, for each host in the LAN (corresponding to each intranet)

IP) Perform rate control based on traffic credits to prevent congestion of wireless LANs due to a small number of terminals starting P2P downloads, videos, and the like. You can specify that this control is not enabled for certain IP addresses, or that more loose or stricter control parameters are enabled.

4. On the aggregation router, perform traffic rate-based rate control on the data flow from each IP subnet (perhaps corresponding to a department, a building, or a residential cell of the company), avoiding terminals in a few subnets. Excessive bandwidth usage affects the network speed of other subnets throughout the network.

It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should understand that the present invention is not limited by the described action sequence. Because in accordance with the present invention, certain steps may be performed in other sequences or concurrently. In addition, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In the above embodiments, the descriptions of the various embodiments are different, and the parts that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

4 is a schematic structural diagram of a data packet transmission apparatus according to Embodiment 4 of the present invention, as shown in FIG.

As shown in FIG. 4, the transmission device of the data packet of this embodiment may include a traffic credit adding module 41, a traffic credit acquiring module 42, a control information acquiring module 43, and a transmission rate control module 44. The traffic credit adding module 41 increases the traffic credit of the data stream according to the rate of increase of the traffic credit, and the traffic credit obtaining module 42 receives the data packet of the data stream, and obtains the traffic credit of the data stream, and the control information acquiring module 43 according to the data stream. Corresponding relationship between the traffic credit and the control information of the data flow, and acquiring the data flow corresponding to the traffic credit of the data flow acquired by the traffic credit acquisition module 42 The control information, the transmission rate control module 44 transmits the data packet received by the traffic credit acquisition module 42 according to the control information of the data stream acquired by the control information acquisition module 43, and consumes the traffic credit corresponding to the data packet. The control information of the data stream may include, but is not limited to, one of the following information: a control rate of the data stream, a scheduling weight of the data stream, and a transmission priority identifier.

The functions of the foregoing method in the first embodiment of the present invention, the P-GW in the second embodiment of the present invention, and the eNodeB in the third embodiment of the present invention can be implemented by the data packet transmission apparatus provided in this embodiment.

Further, the control information acquired by the control information acquiring module 43 is a control rate. The transmission rate control module 44 in this embodiment may specifically control the transmission rate of the data stream if the transmission rate of the data stream is less than or equal to the control rate of the data stream. The module 44 allows the above data packet to pass, and deducts the traffic credit corresponding to the data packet from the traffic credit of the data stream. Otherwise, the transmission rate control module 44 does not allow the data packet to pass, and does not flow from the data flow. The credit credit corresponding to the data packet is deducted from the credit, thereby realizing the control rate for controlling the transmission rate of the data stream to be less than or equal to the data flow.

Further, the control information acquired by the control information acquiring module 43 is a scheduling weight. The transmission rate control module 44 in this embodiment may be specifically configured to transmit the data packet according to the scheduling weight of the data stream, and from the data stream. The traffic credit is deducted from the traffic credit corresponding to the data packet.

Further, the control information acquired by the control information acquiring module 43 is a transmission priority identifier, and the transmission rate control module 44 in this embodiment may specifically transmit the data packet, and mark the transmission priority identifier in the data packet, and Deducting the traffic credit corresponding to the data packet from the traffic credit of the above data stream

In this embodiment, the traffic credit acquisition module acquires the traffic credit of the data flow to which the data packet belongs, and the control information acquisition module acquires the obtained relationship with the traffic credit acquisition module according to the correspondence between the traffic credit of the data flow and the control information of the data flow. Control information of the data flow corresponding to the traffic credit of the data stream, so that the transmission rate control module can obtain the data according to the control information acquiring module The control information of the data stream is transmitted, and the data packet received by the traffic credit obtaining module is transmitted, and the traffic credit corresponding to the data packet is consumed, which can suppress a small number of terminals from occupying excessive network resources, and avoid the control period in the FUP method. In the initial stage, the service caused by network congestion cannot be performed normally, and the network resources are wasted due to insufficient network load at the end of the control period, thereby improving the service success rate and the utilization of network resources.

Further, as shown in FIG. 5, the data packet transmission apparatus of this embodiment may further include a control parameter obtaining module 51, configured to acquire transmission control parameters, where the foregoing transmission control parameters may include but are not limited to the following parameters: Control the correspondence of rates and the rate of increase of traffic credits. Further, the above transmission control parameters may further include a maximum traffic credit and/or an initial traffic credit. Further, the foregoing transmission control parameter may further include feature information of at least one service data flow.

Specifically, the control parameter obtaining module 51 may obtain the transmission control parameter from the network element (for example, a network element such as a PCRF or an MME). Further, the transmission rate control module 44 may also send the traffic credit of the data stream to the network element after the data packet is transmitted, so that the parameter sending network element sets a new transmission control parameter.

It can be understood that: when the control is actually implemented, less than a certain rate, and less than or equal to a certain rate, is basically equivalent in control effect, and the terms "less than" and "less than or equal to" are not strictly distinguished in the present invention. , and the difference between "greater than" and "greater than or equal to"

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing storage device includes the following steps: The foregoing storage medium includes: a ROM, a RAM, a magnetic disk, or an optical disk, and the like, which can store various sequential codes.

It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

Rights request

A method for transmitting a data packet, comprising:

The method according to claim 1, wherein the control information is a control rate, and the data packet is transmitted according to control information of the data stream, and the traffic credit corresponding to the data packet is consumed. Includes:

If the transmission rate of the data stream is less than or equal to the control rate of the data stream, allowing the data packet to pass, and deducting the traffic credit corresponding to the data packet from the traffic credit of the data flow, and vice versa The data packet is allowed to pass, and the traffic credit corresponding to the data packet is not deducted from the traffic credit of the data flow.

The method according to claim 1, wherein the control information is a scheduling weight, and the data packet is transmitted according to control information of the data stream, and the traffic credit corresponding to the data packet is consumed. Includes:

And transmitting, according to the scheduling weight of the data stream, the data packet, and deducting the traffic credit corresponding to the data packet from the traffic credit of the data flow.

The method according to claim 1, wherein the control information is a transmission priority identifier, and the data packet is transmitted according to control information of the data stream, and the data packet is consumed. Traffic credits include:

Transmitting the data packet, marking the transmission priority identifier in the data packet, and deducting the traffic credit corresponding to the data packet from the traffic credit of the data flow.

The method according to claim 4, wherein the method further comprises: When congestion occurs, the data packet corresponding to the lower priority transmission priority identifier is discarded according to the transmission priority identifier in the data packet.

The method according to any one of claims 1 to 5, wherein the method further comprises:

Obtaining a transmission control parameter, where the transmission control parameter includes a correspondence between the traffic credit and the control information and an increase rate of the traffic credit.

The method according to claim 6, wherein the transmission control parameter further comprises: a maximum traffic credit and/or an initial traffic credit and/or characteristic information of the at least one service data flow, the method further comprising:

And setting an initial traffic credit for the data flow, the traffic credit of the data flow is increased from the initial traffic credit according to an increase rate of the traffic credit; and/or

Using the maximum traffic credit as an upper limit value of the traffic credit increase of the data flow; and/or identifying a corresponding service data flow according to the feature information of the at least one service data flow, so that the service data is received Streaming packets.

The method of claim 6, wherein the obtaining the transmission control parameter comprises: obtaining a transmission control parameter from the parameter sending network element, and the obtaining, before the obtaining the transmission control parameter by the parameter sending network element, the method further comprises:

The parameter sending network element sets the acquiring transmission control parameter according to at least one of the subscription information of the terminal, the status information of the terminal, the location information of the terminal, the status information of the network, the time information, and the accumulated usage flow.

The method according to claim 8, wherein the transmitting, according to the control information of the data stream, the data packet, and consuming the traffic credit corresponding to the data packet, further comprising: The network element sends the traffic credit of the data flow, so that the parameter sends the network element to set a new transmission control parameter.

10. A data packet transmission apparatus, comprising:

a traffic credit increase module, configured to increase a traffic flow of the data flow according to an increase rate of the traffic credit use;

The device according to claim 10, wherein the control information is a control rate, and the transmission rate control module is specifically configured to:

The device according to claim 10, wherein the control information is a scheduling weight, and the transmission rate control module is specifically configured to:

The device according to claim 10, wherein the control information is a transmission priority identifier, and the transmission rate control module is specifically configured to:

The device according to any one of claims 10 to 13, wherein the device further comprises:

And a control parameter obtaining module, configured to acquire a transmission control parameter, where the transmission control parameter includes a correspondence between the traffic credit and the control information and an increase rate of the traffic credit.

15. The apparatus according to claim 14, wherein the control parameter acquisition mode The block is specifically configured to obtain a transmission control parameter from a parameter sending network element, where the transmission rate control module further uses