WO2015096051A1

WO2015096051A1 - Method and apparatus for load balancing

Info

Publication number: WO2015096051A1
Application number: PCT/CN2013/090396
Authority: WO
Inventors: 王硕
Original assignee: 华为技术有限公司
Priority date: 2013-12-25
Filing date: 2013-12-25
Publication date: 2015-07-02
Also published as: CN105264856A; CN105264856B

Abstract

Disclosed are a method and apparatus for load balancing, which relate to the field of network management and are used to solve the problem of the unbalanced utilization of resources occupied by an individual operator on P-GWs caused by selecting a P-GW merely according to weight information about the plurality of P-GWs having the same APN when an MME requests to access the P-GW. The method provided in the present invention comprises: acquiring an APN according to a PDN connection request, querying a P-GW list composed by P-GWs corresponding to the APN, and selecting a P-GW to establish a PDN connection according to P-GW identifiers of the P-GWs and the resource throughput capability level and bearing amount of the P-GWs in the list, and the resource throughput capability level and bearing amount occupied by an operator corresponding to the APN on the P-GWs. The embodiments of the present invention are mainly applied to a process for establishing a PDN connection.

Description

Method and device for load balancing

Technical field

The present invention relates to the field of network management, and in particular, to a load balancing method and apparatus.

Background technique

In 3GPP (3rd Generation Partner Project), the architecture of the SAE (System Arc Hitecture Evo Hit io n) system includes MME (Mobility Management Entity), S - GW (Serving Gateway, Service Gateway Entity), P-GW (Packet Data Network Gateway), and other network element devices for management and accounting functions. The SAE system completes user connections through these network element devices. The task of accessing the 3GPP access network and non-3GPP access networks.

On the basis of the SAE system, in order to meet the ever-increasing demand for mobile network traffic, network operators have introduced new services by renting networks to each other in order to save costs. Therefore, network sharing between operators has occurred. In this way, a network operator's network may provide services for multiple operators at the same time. In the process of deploying a shared network for multiple operators, multiple P-GWs may need to be deployed according to the service characteristics of any carrier. The multiple P-GWs may have the same APN (Access Point Name). Therefore, when the operator establishes a PDN (Packet Data Network) connection according to the APN, multiple carriers will be connected. A P-GW with the same APN is used as the access object. However, since each P-GW has different load capabilities, some P-GW residuals may occur if the P-GW is accessed in a random manner. A lot of resources, while other P-GW resources are insufficient.

In the prior art, a method for controlling P-GW access is proposed in the prior art, which specifically includes:

In the P-GW address list provided by the DNS, the throughput and the carrying capacity of the P-G W are increased. The MME can select one of the P-GWs to establish a PDN connection according to the throughput capability and the carrying capacity of each P-GW. In the process of implementing the above method, the inventors found that at least the following problems exist in the prior art:

In a shared network, different operators have different throughputs and bearers in different P-GWs. If only the P-GW's throughput capacity and capacity are selected, a certain P-GW may appear. There are a lot of resources remaining in the total network capacity, but the resources of a certain carrier's contracted capacity at the P-GW are insufficient, and the resources of the contracted capacity of other P-GWs are still large, and it is impossible to Balanced use of resources contracted by operators reduces the quality of services provided to operators.

Summary of the invention

An embodiment of the present invention provides a method and apparatus for load balancing, which is used to solve the problem that when the MM E requests to access the P-GW, the P-GW is selected according to the weight information of multiple P-GWs having the same APN, thereby establishing a connection. The problem that the resources signed by a single operator on these P-GWs cannot be balancedly utilized.

In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a method for load balancing, which is based on a system architecture evolution SAE system, and specifically includes:

After receiving the PDN connection request sent by the user equipment, acquiring the access point name APN according to the PDN connection request;

Querying a P-GW list formed by the first P-GW corresponding to the APN; the P-GW list includes a P-GW identifier of the first P-GW and a P-GW load capability factor, where the P a GW load capability factor including a resource throughput capability level and a bearer number of the first P-GW, and a resource throughput capability level of the carrier corresponding to the APN on the first PG W and Number of bearers;

According to the P-GW list, the P-GW is selected and a PDN connection is established.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the selecting a P-GW and establishing a PDN connection according to the P-GW list includes:

Determining a low-load P-GW list composed of a second P-GW that is not in a high-load state in the P-GW list; the high-load state is a state in which the current resource bearer usage of the P-GW exceeds an alarm value. Or, the current resource bearer usage of the P-GW does not exceed the alarm value, but the current resource bearer usage of the operator corresponding to the APN on the P-GW exceeds the alarm value;

And selecting, according to the resource throughput capability level and the number of bearers of the second P-GW, a plurality of P-GWs having a high throughput capability level and a large carrying capacity from the low load list; Determining, according to the resource throughput capability level and the number of bearers signed by the operator corresponding to the APN on the selected P-GW, determining, by the selected P-GW, the operator is selected in the The P-GW with a high resource throughput capability level and a large number of bearers on the P-GW is selected; the determined P-GW is selected to establish a PDN connection.

With reference to the first aspect, in a second possible implementation manner of the first aspect, the determining, by the second P-GW that is not in a high load state in the P-GW list, is a list of low load P-GWs Includes:

Receiving a first message; the first message carries a P-GW identifier and an APN of a third P-GW in a high load state;

And searching for a corresponding third P-GW from the P-GW list according to the P-GW identifier and the APN of the third P-GW;

And deleting, from the P-GW list, the P-GW identifier and the P-GW load capability factor of the found third P-GW from the P-GW list.

With reference to the first aspect, in a third implementation manner of the first aspect, the determining, by the second P-GW, the low-load P-GW list that is not in a high-load state in the P-GW list, Also includes:

Receiving a second message; the second message carries a P-GW identifier and an APN of a fourth P-GW that needs to cancel a high load state;

Determining a corresponding fourth P-GW according to the P-GW identifier of the fourth P-GW and the APN; Adding a P-GW identity and a P-GW load capability factor of the fourth P-GW to the P-GW list.

In conjunction with the first aspect, in the fourth possible implementation method of the first aspect, the method further includes:

After receiving the PDN connection request sent by the user equipment, acquiring the APN according to the PDN connection request;

Obtaining a pre-configured P-G W list from the DNS according to the APN;

According to the obtained P-GW list, select the P-GW and establish a PDN connection.

In a second aspect, the present invention provides a device for load balancing, the device being applied to a SAE system, including:

An obtaining module, configured to obtain an access point name APN according to the PDN connection request after receiving a PDN connection request sent by the user equipment;

a querying module, configured to query a P-GW list formed by the first P-GW corresponding to the APN; the P-GW list includes a P-GW identifier and a P-GW load capability of the first P-GW a factor, the P-GW load capability factor includes a resource throughput capability level and a bearer number of the first P-GW, and an operator that is associated with the APN is subscribed to the first P-GW Resource throughput capability level and number of bearers;

And a connection module, configured to select a P-GW and establish a PDN connection according to the P-GW list. With reference to the second aspect, in a first possible implementation manner, the connecting module includes: a determining unit, configured to determine a low-load P-GW list composed of a second P-GW that is not in a high-load state in the P-GW list; the high-load state refers to a current resource bearer usage of the P-GW The state in which the alarm value is exceeded, or the current resource bearer usage of the P-GW does not exceed the alarm value, but the current resource bearer usage of the operator corresponding to the APN on the P-GW exceeds the alarm value. ;

a selecting unit, configured to select, according to the resource throughput capability level and the number of bearers of the second P-GW, a plurality of P-GWs having a high throughput capability level and a large carrying capacity from the low load list; Determining, by the operator corresponding to the APN, the resource throughput capability level and the number of bearers signed on the selected P-GW, and determining, from the selected P-GW, one of the selected P-GWs by the operator P-GW with high resource throughput capability and large number of bearers;

The connecting unit is configured to select the determined P-GW to establish a PDN connection.

With reference to the second aspect, in a second possible implementation manner, the determining unit includes: a receiving subunit, configured to receive a first message; the first message carries a P of a third P-GW in a high load state - GW identity and APN;

a locating unit, configured to search for a corresponding third P-GW from the P-GW list according to the P-GW identifier and the APN of the third P-GW;

And a management subunit, configured to remove, from the P-GW list, the P-GW identifier and the P-GW load capability factor of the found third P-GW from the P-GW list.

With reference to the second aspect, in a third possible implementation manner, the receiving subunit is further used And receiving the second message; the second message carrying the fourth state that needs to cancel the high load state

P-GW's P-GW identity and APN;

The finding subunit is further configured to search for a corresponding fourth P-GW according to the P-GW identifier of the fourth P-GW and the APN;

The management subunit is further configured to add the P-GW identifier and the P-GW load capability factor of the fourth P-GW to the P-GW list.

With reference to the second aspect, in a fourth possible implementation manner, the acquiring module is further configured to: after receiving a PDN connection request sent by the user equipment, acquire an APN according to the PDN connection request; according to the APN from the DNS Obtain a pre-configured P-GW list;

The connection module is further configured to select a P-GW and establish a PDN connection according to the obtained P-GW list.

In the load balancing method and device provided by the embodiment of the present invention, the MME obtains the APN by the PDN connection request sent by the user, and queries the corresponding P-GW list according to the resource throughput of the P-GW in the P-GW list. The capacity capability level and the number of bearers, and the resource throughput capability level and number of bearers signed by the operator corresponding to the APN on the P-GW, select the P-GW and establish a PDN connection. In the above manner, in the present invention, the MME not only selects according to the throughput capability and the number of bearers of the P-GW itself, but also increases the content selected according to the throughput capability and the number of bearers subscribed by the operator on the PG W, so that the MME When the P-GW is selected to establish a connection, it is also possible to select according to the throughput capability and the number of bearers signed by different operators on different P-GWs. When the MME requests access to the P-GW, the P-GW is selected to establish a connection only according to the weight information of the multiple P-GWs having the same APN, and the resources signed by the single operator on the P-GW cannot be The problem of balanced use.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are to be regarded as Other drawings may also be obtained from these drawings without the use of creative labor.

FIG. 1 is a flowchart of a method for load balancing according to an embodiment of the present invention;

FIG. 2 is a flowchart of another method for selecting a P-GW according to a P-GW list according to an embodiment of the present invention;

FIG. 3 is a flowchart of a method for determining a low-load P-GW list according to an embodiment of the present invention; FIG. 4 is a flowchart of a method for releasing a high-load state of a P-GW according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a device for load balancing according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a detailed device for load balancing according to an embodiment 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. Rather than all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The embodiment of the present invention provides a load balancing method, which is applied to a SAE system. In the embodiment of the present invention, the execution body of all the steps is an MME, and the method flow is as shown in FIG. 1 , and the specific method includes:

101. After receiving the PDN connection request sent by the user equipment, obtain the access point name APN according to the PDN connection request.

The APN may be obtained by parsing the home operator or the MVNO of the user equipment by using the IMSI number carried in the PDN connection request sent by the MME by the MME, or may select the process of requesting the authentication data from the MME to the HSS. The embodiment of the present invention does not impose any limitation on the home operator of the user equipment that is resolved by the HSS.

102. Query a P-GW list formed by the first P-GW corresponding to the APN.

The P-GW list includes a P-GW identifier of the first P-GW and a P-GW load capability factor, where the P-GW load capability factor includes a resource throughput capability of the first P-GW. a level and a number of bearers, and a resource throughput capability level and a number of bearers subscribed by the operator corresponding to the APN on the first P-GW. Each APN corresponds to an identifier of an operator, and the first P-GW corresponding to the APN refers to an operator corresponding to the APN or all P-GWs subscribed by the MVNO, and each P-GW identifier corresponds to the P-GW. P-GW load capacity factor of P-GW. In the embodiment of the present invention, the P-GW identifier and the P-GW load capacity factor may be pre-configured in the MME, and may be directly searched from the MME when needed, and of course, the P-GW identifier may be selected and The P-GW load capacity factor is pre-configured in the DNS. When required, the MME sends the request information carrying the APN to the DNS, and after searching from the DNS, the response message is returned to the MME, and the present invention does not do more here. limit.

103. Select, according to the P-GW list, a P-GW and establish a PDN connection.

The specific P-GW is selected according to the load capacity factor of each P-GW in the P-GW list. The specific process for the description is described in the subsequent method flow, and therefore will not be described here.

In the load balancing method provided by the embodiment of the present invention, the MME obtains the APN by the PDN connection request sent by the user, and queries the corresponding P-GW list according to the resource throughput capability of the P-GW in the P-GW list. The level and number of bearers, and the resource throughput capability level and number of bearers signed by the operator corresponding to the APN on the PG W, select the P-GW and establish a P DN connection. In the above manner, in the present invention, the MME not only selects according to the throughput capability and the number of bearers of the P-GW itself, but also increases the content selected according to the throughput capability and the number of bearers subscribed by the operator on the PG W, so that the MME When the P-GW is selected to establish a connection, it is also possible to select according to the throughput capability and the number of bearers subscribed by different operators on different P-GWs, and solve the problem that when the MME requests to access the P-GW, only according to the same The weight information of multiple P-GWs of the APN selects the P-GW to establish a connection, resulting in the resources signed by a single operator on these P-GWs. The problem of not being able to be balanced.

In order to further describe the method in the step 103, the embodiment of the present invention further provides an implementation manner of selecting a P-GW and establishing a PDN connection according to the P-GW list. As shown in FIG. 2, the method specifically includes:

1031. Determine a low load P-GW list consisting of a second P-G W that is not in a high load state in the P-G W list.

The high-load state refers to a state in which the current resource bearer usage of the P-GW exceeds the alarm value, or the current resource bearer usage of the P-GW does not exceed the alarm value, but the operator corresponding to the APN is The current resource bearer usage on the P-GW exceeds the state of the alarm value.

The setting of the high load state for the P-GW is to avoid the burden of the MME, because when the MME sends a PDN connection request to the P-GW, the bearer capability of the P-GW may occur, or the P-GW corresponds to the P-GW. The carrier has insufficient bearer capacity for signing on the P-GW. If there are insufficient resources of multiple P-GWs at the same time, the MME may need to send multiple PDN connection requests to multiple P-GWs if the PDN connection is successfully established. Therefore, the above situation is avoided by the method in which the P-GW detects whether it is in a high load state and reports it to the MME.

The P-GW in the low load state is the currently allowed P-GW, and the P-GW of the high load state is set to limit the load burden of the P-GW itself, or the load burden is not heavy, However, the load of an operator contracted on the P-GW on the P-GW will exceed the amount of the contracted load, so the P-GW can be considered as unavailable for the operator. The P-GW, when a PDN connection needs to be established, selects only the low-load P-GW to balance the load of each P-GW and the load of each operator on the subscribed P-GW.

1032. Select, according to the resource throughput capability level and the number of bearers of the second P-GW, a plurality of P-GWs having a high throughput capability level and a large carrying capacity from the low load list.

First, the P-GW is selected according to the bearer capability of the P-GW in the low-load list, and the P-GWs with strong bearer capabilities are selected to ensure that the P-GW with strong bearer capability can be preferentially selected. In order to make the resources of the P-GW with strong carrying capacity can be fully utilized, as for the selected quantity, it can be set according to specific needs, and no further restrictions are imposed here.

1033. Determine, according to a resource throughput capability level and a number of bearers signed by the operator corresponding to the APN on the selected P-GW, determining, by the selected P-GW, one of the operators in the The selected P-GW has a high resource throughput capability level and a large number of P-GWs.

In this step, the bearer capability of the P-GW selected by the operator in the previous step is selected, and the P-GW with strong bearer capability signed by the operator is selected to ensure that the operator signs the contract. The P-GW with strong carrying capacity can be preferentially selected so that the resources contracted by the operator can be allocated in a balanced manner.

1034. Select the determined P-GW to establish a PDN connection.

It should be noted that, after selecting the P-GW, the MME needs to go through the S-GW to select The selected P-GW sends a request to create a PDN connection, and then, after receiving the request for the PDN connection, the P-GW performs the relevant PCC process, and returns a PDN connection response to the MME through the S-GW, and finally the MME replies to the user equipment. The PDN connection responds and establishes a PDN connection. In the embodiment of the present invention, in order to facilitate the understanding of the solution of the present invention, the interaction process between devices is simplified by establishing a description of the PDN connection.

In the embodiment of the present invention, multiple P-GWs are selected by first determining a low-load P-GW list, and selecting a resource throughput capability level and a bearer number according to the P-GW bearer capability in the low-load list, and from these P- In the GW, a P-GW is determined according to the resource throughput capability level and the number of bearers signed by the operator, and finally the method for establishing the PDN connection by the determined P-GW is selected, so that the MME can select according to the P-GW list, and Determining the unique P-GW to establish a PDN connection provides a selection criterion for the load balancing of the P-GW, thereby providing implementability for the implementation of the load balancing method.

Further, in order to more clearly describe the method in the step 1031, the embodiment of the present invention further provides a method for determining a low-load list. The flowchart is as shown in FIG. 3, and specifically includes:

301. Receive the first message.

The first message is sent by the P-GW to the MME, and when a P-GW detects that the load of the P-GW reaches a preset alarm value, or the load of a certain operator on a certain P-GW When the alarm value of the pre-signed load is reached, the first message is sent to the MME, where the first message carries the P-GW identifier and the APN of the third P-GW in a high load state. The P-GW is configured to notify the P-GW that the MME is in a high load state, where the P-GW identifier is used to identify a P-GW in a high load state, and the operator identifier is used to identify an operator in a high load state, The APN is used to correspond to the corresponding P-GW and operator in the P-GW list.

302. Search for a corresponding third P-GW from the P-GW list according to the P-GW identifier and the APN of the third P-GW.

The correspondence between the APN and the P-GW load capacity factor of the P-GW corresponding thereto and the correspondence between all the operators that are subscribed to the corresponding P-GW are stored in the third P-GW list. And the correspondence between the load capacity factors of each operator on the P-GW. Therefore, the corresponding P-GW can be found according to the P-GW identity and the APN.

303. Remove, from the P-GW list, the P-GW identifier and the P-GW load capability factor of the found third P-GW from the P-GW list.

After the corresponding P-GW is found, the P-GW identifier and the P-GW load capability factor corresponding to the P-GW are deleted from the P-GW list, and the P-GW list is not available in this manner. Use the P-GW to get rid of it.

In the embodiment of the present invention, the identifier of the corresponding P-GW and the P-GW load capacity factor are searched for and deleted from the P-GW list according to the received message including the P-GW identifier and the APN in a high load state. The P-GW in the high load state is removed from the list of PDN connections selected by the P-GW, so that when a certain P-GW is in a high load state, the MME cannot select and establish a PDN connection, and further Select other P-GWs in low load state The P-GW with strong load capability is selected to establish a PDN connection, and the P-GW that the MME learns to be in a high load state is obtained, and the method for the MME to select the P-GW is prohibited, thereby ensuring the implementability of the load balancing.

Further, in order to more clearly describe the method in the step 1031, the embodiment of the present invention further provides a method for releasing the high load state of the P-GW. Specifically, as shown in FIG. 4, the method includes:

401. Receive a second message.

The second message carries the P-G W identifier and the APN of the fourth P-GW that need to cancel the high load state. When a P-GW detects that the load has decreased below the alarm value, it sends a message to the MME that cancels the high load state of the P-GW, and carries the P-GW of the P-GW in the message. The GW identifier and APN are used for corresponding lookup.

402. Search for a corresponding fourth P-GW according to the P-GW identifier of the fourth P-GW and the APN. The P-GW identifier and the APN may be searched in the P-GW list of all P-GWs stored in the MME, and when the corresponding P-G W is found, the P-GW load capacity factor may be obtained according to the corresponding relationship.

403. Add a P-GW identifier and a P-GW load capability factor of the fourth P-GW to the P-GW list.

In the embodiment of the present invention, the MME receives a message from the P-GW corresponding to the APN to release the high-load state of the P-GW, and the P-GW identifier and the APN in the message find the corresponding P-GW and P-GW load capacity factor, then the P-GW and its P-GW load energy will be found The manner in which the load factor is stored in the P-GW list enables the MME to reselect the P-GW to establish a PDN connection when the P-GW changes from a high load state to a low load state, thereby releasing the P-GW from the high load state. Implementability and provide real-time availability of low-load PG W lists.

Another embodiment of the present invention provides a device for load balancing, which is applied to a S AE system, as shown in FIG. 5 and FIG. 6, to implement the method flow shown in any of FIG. 1 to FIG. The method includes: an obtaining module 51, configured to acquire an access point name APN according to the PDN connection request after receiving a PDN connection request sent by the user equipment.

The querying module 52 is configured to query a P-GW list formed by the first P-GW corresponding to the APN; the P-GW list includes a P-GW identifier and a P-GW load of the first P-GW a capability factor, the P-GW load capability factor includes a correspondence between a resource throughput capability level of the first P-GW and a bearer number, and an operator corresponding to the APN is in the first P-GW The resource throughput capability level and number of bearers signed on the board.

The connection module 53 is configured to select a P-GW according to the P-GW list and establish a PDN connection. Optionally, the connection module includes:

The determining unit 54 is configured to determine a low-load P-GW list composed of a second P-GW that is not in a high-load state in the P-GW list, where the high-load status refers to a current resource bearer number of the P-GW. The state in which the quantity exceeds the alarm value, or the current resource bearer usage of the P-GW does not exceed the alarm value, but the current resource bearer usage of the operator corresponding to the APN on the PG W exceeds the alarm value. . The selecting unit 55 is configured to select, according to the resource throughput capability level and the number of bearers of the second PG W, a plurality of P-GWs having a high throughput capability level and a large carrying capacity from the low load list; Determining, by the corresponding operator, the resource throughput capability level and the number of bearers signed on the selected P-GW, and determining, from the selected P-GW, one of the selected operators in the selected Ρ-GW The P-GW with a high level of resource throughput capability and a large number of bearers.

The connecting unit 56 is configured to select the determined P-GW to establish a PDN connection.

Optionally, the determining unit includes:

The receiving subunit 57 is configured to receive the first message, where the first message carries the P-GW identifier and the 第三 of the third P-GW in a high load state.

The finding subunit 58 is configured to search for a corresponding third P-GW from the P-GW list according to the P-GW identifier of the third P-GW.

The management sub-unit 59 is configured to remove, from the P-GW list, the P-GW identifier and the P-GW load capability factor of the found third P-GW from the P-GW list.

Optionally, the receiving subunit 57 is further configured to receive the second message, where the second message carries the P-GW identifier and the APN of the fourth P-GW that need to cancel the high load state.

The lookup 58 subunit is further configured to search for the corresponding fourth P-GW according to the P-GW identity of the fourth P-GW and the APN.

The management 59 subunit is further configured to add the P-GW identifier and the P-GW load capability factor of the fourth P-GW to the P-GW list. Optionally, the obtaining module 51 is further configured to: after receiving the PDN connection request sent by the user equipment, acquire an APN according to the PDN connection request; and obtain a pre-configured P-GW list from the DNS according to the APN.

The connection module 53 is further configured to select a P-GW and establish a PDN connection according to the obtained P-GW list.

In the load balancing device provided by the embodiment of the present invention, the MME obtains the APN by the PDN connection request sent by the user, and queries the corresponding P-GW list according to the resource throughput capability of the P-GW in the P-GW list. The level and number of bearers, and the resource throughput capability level and number of bearers signed by the operator corresponding to the APN on the PG W, select the P-GW and establish a P DN connection. In the above manner, in the present invention, the MME not only selects according to the throughput capability and the number of bearers of the P-GW itself, but also increases the content selected according to the throughput capability and the number of bearers subscribed by the operator on the PG W, so that the MME When the P-GW is selected to establish a connection, it is also possible to select according to the throughput capability and the number of bearers subscribed by different operators on different P-GWs, and solve the problem that when the MME requests to access the P-GW, only according to the same The weight information of the plurality of P-GWs of the APN selects the P-GW to establish a connection, and the problem that the resources signed by the single operator on these P-GWs cannot be balancedly utilized.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus necessary general hardware, and of course, by hardware, but in many cases, the former is a better implementation. . Based on such understanding, the technique of the present invention The portion of the program that contributes in essence or to the prior art may be embodied in the form of a software product stored in a readable storage medium, such as a computer floppy disk, hard disk or optical disk, etc., including several The instructions are for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

claims

1. A load balancing method, characterized in that the method evolves the SAE system based on the system architecture, and the method includes:

After receiving the packet data network PDN connection request sent by the user equipment, obtain the access point name APN according to the PDN connection request;

Query the P-GW list composed of the first packet data network gateway P-GW corresponding to the APN; the P-GW list includes the P-GW identification and P-GW load capacity factor of the first P-GW , the P-GW load capability factor includes the resource throughput capability level and number of bearers of the first P-GW, and, the resources contracted by the operator corresponding to the APN on the first P-GW Throughput capability level and number of bearers;

According to the P-GW list, select a P-GW and establish a PDN connection.

2. The method according to claim 1, characterized in that, selecting a P-GW and establishing a PDN connection according to the P-GW list includes:

Determine a low-load P-GW list composed of the second P-GW in the P-GW list that is not in a high-load state; the high-load state refers to a state in which the current resource bearer usage of the P-GW exceeds the alarm value , Or, the current resource bearer usage of the P-GW does not exceed the alarm value, but the current resource bearer usage of the operator corresponding to the APN on the P-GW exceeds the alarm value;

According to the resource throughput capability level and number of bearers of the second P-GW, from the low load Select multiple P-GWs with high throughput capabilities and large carrying capacity from the list;

According to the resource throughput capability level and the number of bearers contracted by the operator corresponding to the APN on the selected P-GW, determine one of the operators from the selected P-GW on the selected P-GW. The P-GW contracted on the P-GW has a high level of resource throughput capability and a large number of bearers; select the determined P-GW to establish a PDN connection.

3. The method according to claim 2, wherein determining the low-load P-GW list composed of the second P-GW that is not in a high-load state in the P-GW list includes: receiving the second P-GW list that is not in a high-load state. A message; The first message carries the P-GW identification and APN of the third P-GW in a high load state;

Search the corresponding third P-GW from the P-GW list according to the P-GW identification and APN of the third P-GW;

Delete the P-GW identification and P-GW load capacity factor of the found third P-GW from the P-GW list.

4. The method according to claim 2, wherein the determining a low-load P-GW list composed of the second P-GW in the P-GW list that is not in a high-load state further includes:

The second message received; the second message carries the P-GW identification and APN of the fourth P-GW that needs to be released from the high load state;

Search for the corresponding fourth P-GW according to the P-GW identifier and APN of the fourth P-GW; Add the P-GW identification and P-GW load capability factor of the fourth P-GW to the P-GW list.

5. The method according to claim 1, wherein the method further includes: after receiving the PDN connection request sent by the user equipment, obtaining the APN according to the PDN connection request;

Obtain the pre-configured P-GW list from DNS according to the APN;

6. A load balancing device, characterized in that the device is applied to an SAE system, including:

An acquisition module, configured to obtain the access point name APN according to the PDN connection request after receiving the PDN connection request sent by the user equipment;

Query module, used to query the P-GW list composed of the first P-GW corresponding to the APN; the P-GW list includes the P-GW identification and P-GW load capacity of the first P-GW Factor, the P-GW load capability factor includes the corresponding relationship between the resource throughput capability level and the number of bearers of the first P-GW, and the operator corresponding to the APN on the first P-GW The contracted resource throughput capability level and number of bearers;

A connection module, configured to select a P-GW and establish a PDN connection according to the P-GW list.

7. The device according to claim 6, characterized in that the connection module includes: Determining unit, used to determine a low-load P-GW list composed of a second P-GW that is not in a high-load state in the P-GW list; the high-load state refers to the current resource bearer usage of the P-GW The state of exceeding the alarm value, or the current resource bearer usage of the P-GW does not exceed the alarm value, but the current resource bearer usage of the operator corresponding to the APN on the P-GW exceeds the alarm value. ;

A selection unit configured to select multiple P-GWs with high throughput capability levels and large bearer capacity from the low load list based on the resource throughput capability level and number of bearers of the second P-GW; The resource throughput capability level and number of bearers contracted by the operator on the selected P-GW corresponding to the APN are determined from the selected P-GW. A P-GW with a high resource throughput capability level and a large number of bearers has been contracted;

The connection unit is used to select the determined P-GW to establish a PDN connection.

8. The device according to claim 6, wherein the determining unit includes: a receiving subunit, configured to receive a first message; the first message carries the P of the third P-GW in a high load state. -GW logo and APN;

A search subunit, configured to search for the corresponding third P-GW from the P-GW list according to the P-GW identification and APN of the third P-GW;

The management subunit is configured to delete the P-GW identifier and the P-GW load capacity factor of the found third P-GW from the P-GW list.

9. The device according to claim 6, characterized in that the receiving subunit also uses Based on the received second message; the second message carries the P-GW identification and APN of the fourth P-GW that needs to be released from the high load state;

The search subunit is also used to search for the corresponding fourth P-GW according to the P-GW identification and APN of the fourth P-GW;

The management subunit is also configured to add the P-GW identification and P-GW load capability factor of the fourth P-GW to the P-GW list.

10. The device according to claim 1, wherein the acquisition module is further configured to obtain the PDN connection request according to the PDN connection request after receiving the PDN connection request sent by the user equipment.

APN; Obtain the pre-configured P-GW list from DNS according to the APN;

The connection module is also used to select a P-GW and establish a PDN connection based on the obtained P-GW list.