CN108696902B - Method and device for balancing network equipment load - Google Patents

Abstract

The invention discloses a method for load balancing of network equipment. Based on the equipment state of the second network equipment, it is determined that the second network equipment is switched from a failover to a normal working state; wherein, the equipment state is used to represent whether the second network equipment is in a normal working state. Normal working state; obtain the total number of user equipments (UEs) managed by itself, and determine N UEs that need to be migrated to the second network device based on the total number; N is a positive integer; migrate the N UEs to the the second network device. The invention also discloses a load balancing device for network equipment.

Description

Method and device for load balancing of network equipment

technical field

The present invention relates to the technical field of mobile communication, and in particular, to a method and device for load balancing of network equipment.

Background technique

Under an IP Multimedia Subsystem (IMS) network, network devices of the same type use a pool of resources (POOL) for networking, such as a Session Border Controller (SBC) POOL. Wherein, similar network devices are divided into more than one resource pool, and each resource pool contains more than one network device. In addition, the network devices in each resource pool have the same priority of serving the user equipment, so as to achieve load balance in the resource pool.

For example, when some network devices fail, the original services of the failed network devices need to be migrated to the normal working network devices; after the failure of the failed network devices recovers, the UE can only restart the service in the coverage area after the user reboots. Probabilistically access network devices that are switched from failover to normal working state, so that they can carry services after failure recovery. This load balancing mechanism has a long time period.

SUMMARY OF THE INVENTION

In view of this, the embodiments of the present invention are expected to provide a method and apparatus for load balancing of network devices, which can quickly realize load balancing.

In order to achieve the above-mentioned purpose, the technical scheme of the embodiment of the present invention is realized as follows:

An embodiment of the present invention provides a method for load balancing of network equipment, the method comprising:

Based on the device state of the second network device, it is determined that the second network device is switched from a failover to a normal working state; wherein the device state is used to represent whether the second network device is in a normal working state;

Obtain the total number of user equipment UEs managed by itself, and determine N UEs that need to be migrated to the second network device based on the total number; N is a positive integer;

The N UEs are migrated to the second network device.

An embodiment of the present invention provides an apparatus for load balancing of network equipment, the apparatus includes: a discrimination module, an acquisition module, a determination module and a migration module; wherein,

The judging module is configured to determine, based on the device state of the second network device, that the second network device is switched from a failover to a normal working state; wherein the device state is used to represent whether the second network device is in a normal working state;

The obtaining module is used to obtain the total number of UEs managed by itself;

The determining module is configured to determine, based on the total number, N UEs that need to be migrated to the second network device; N is a positive integer;

The migration module is configured to migrate the N UEs to the second network device.

In the method and apparatus for load balancing of network equipment provided by the embodiments of the present invention, after determining that the fault of the second network equipment is recovered, the processing priority of the second network equipment is set to the highest, according to the UE managed by the first network equipment itself. to obtain N UEs that need to be migrated, and then migrate the N UEs to the second network device. In this way, load balancing between network devices can be quickly implemented only on the network device side without restarting the UE.

Description of drawings

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

2 is a schematic diagram of UE allocation of network equipment before and after fault recovery according to an embodiment of the present invention;

FIG. 3 is a detailed schematic flowchart of a method for network device load balancing according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of the composition and structure of an apparatus for network device load balancing according to an embodiment of the present invention.

Detailed ways

Embodiment 1.

In this embodiment of the present invention, the implementation process of the method for network device load balancing is shown in FIG. 1 , including the following steps:

Step 101: Based on the device state of the second network device, determine that the second network device is switched from a failover to a normal working state; wherein the device state is used to represent whether the second network device is in a normal working state;

Step 102: Obtain the total number of user equipment UEs managed by itself, and determine N UEs that need to be migrated to the second network device based on the total number; N is a positive integer;

Step 103: Migrate the N UEs to the second network device.

Here, the network device refers to a device used to bear the UE in the network, such as an SBC. The first network device is a normally working network device.

Wherein, after it is determined that the second network device is switched to the normal working state, the switch of load balancing is started.

Further, determining the N UEs that need to be migrated to the second network device includes: obtaining a load balancing mode; wherein the load balancing mode is used to indicate the communication type of the UEs that need to be migrated by the first network device; The communication types described above include local and roaming communication types. Based on the load balancing manner, N UEs that need to be migrated to the second network device are determined.

Further, the determining that the second network device is switched from a failover to a normal working state based on the device state of the second network device includes: acquiring the device state of at least one second network device, and determining the at least one second network device In the device, the target second network device is switched from the failover to the normal working state; the processing priority of the target second network device is set to the highest;

Correspondingly, the migrating the N UEs to the second network device includes: migrating the N UEs to the target second network device.

Further, the determining N UEs that need to be migrated to the second network device based on the total number includes: obtaining a preset threshold based on the total number, and determining based on the preset threshold that the UE needs to be migrated to the second network device or, based on the total number and the number of UEs currently managed by at least one other network device, determine N UEs that need to be migrated to the second network device.

Further, the migrating the N UEs to the second network device includes: changing the network connection state between the N UEs and the first network device from an activated state to a deactivated state; wherein, The network connection state is used to represent whether the UE is in an active state; based on the priority order of the first network device and the second network device; wherein, the second network device has the highest priority; sending a control message to N UEs, the The control message is used to control the N UEs to connect to the second network device.

The solution provided by this embodiment can realize the load balancing among the devices relatively quickly, so that the loads of each network device in the system are similar, thereby realizing the safe and stable operation of the whole system. It has broad application prospects in terms of load balancing between network devices of current voice services. At present, there are two main types of voice service implementations in 4G networks, namely, voice services provided based on 2G or 3G circuit domain and voice services provided based on 4G packet domain. With the development of information technology, the way of providing voice services based on the 4G packet domain is more and more widely used, and a typical voice service is based on the IMS network. In the IMS network, the existing load balancing mechanism after network equipment failure is restored is that the UE must restart once in a long period of time, and the processing priority order of each network equipment in the network equipment list is evenly attached to the IMS network. To achieve load balancing. Obviously, this mechanism relying on spontaneity has a long period, and if the UE does not restart, load balancing cannot be achieved. Due to the limited redundancy in the network device resource pool, if a network device fails to recover, if the load in the resource pool cannot be quickly balanced, some network devices are under light load and some network devices are under heavy load, which may easily lead to high-load devices. The operation is unstable, and it is difficult to resist recurring failures, which is not conducive to the overall operation security of the network

By adopting the solution provided in this embodiment, after it is determined that the second network device is switched from a failover to a normal working state, the first network device determines N UEs that need to be migrated to the second network device based on the total number of UEs managed by the first network device, ensuring that Realize load balancing among network devices in a short period of time.

Embodiment two,

In this embodiment of the present invention, the implementation process of the method for network device load balancing is shown in FIG. 1 , including the following steps:

Step 101: Based on the device state of the second network device, determine that the second network device is switched from a failover to a normal working state; wherein the device state is used to represent whether the second network device is in a normal working state;

Step 102: Obtain the total number of user equipment UEs managed by itself, and determine N UEs that need to be migrated to the second network device based on the total number; N is a positive integer;

Step 103: Migrate the N UEs to the second network device.

In step 101 in this embodiment, the network device refers to a device used to bear the UE in the network, such as an SBC. The first network device is a device that works normally. The first network device determines that the second network device is switched from the failover to the normal working state according to the device state of the second network device, which is an indispensable condition for the first network device to start migrating the UE. Specifically, the first network device acquires the device status of at least one second network device, and determines the target second network device that is in the at least one second network device from a failover to a normal working state; next, the target second network device is The processing priority of the second network device is set to be the highest; correspondingly, the N UEs are migrated to the target second network device.

In addition, after it is determined that the second network device is switched from the failover to the normal working state, the switch of load balancing is started. Here, the first network device can automatically turn on the switch of load balancing; or, it can send the status information of the normal operation of the second network device to the user, and manually turn on the switch of load balancing.

In step 102, the first network device determines N UEs that need to be migrated to the second network device, including: acquiring a load balancing mode; wherein the load balancing mode is used to indicate the first network device of the UEs that need to be migrated Communication type; based on the load balancing method, determine N UEs that need to be migrated to the second network device. That is to say, the first network device specifies the type of the UE to be migrated according to the load balancing method. Specifically, the first network device acquires a load balancing mode, and the load balancing mode includes two types: local and roaming. Before migrating the UE, the load balancing mode of the UE to be migrated must be determined first.

Further, the first network device determines N UEs that need to be migrated to the second network device based on the total number, including: obtaining a preset threshold based on the total number, and determining based on the preset threshold that the UE needs to be migrated to the second network device. N UEs of network equipment. Specifically, the first network device obtains a preset threshold according to the total number of UEs managed by itself, and determines N UEs that need to be migrated to the second network device according to the preset threshold. Here, the first network device may migrate N UEs greater than a preset threshold to the second network device based on the total number of UEs; or, the first network device may obtain a preset threshold based on the total number of UEs, the preset threshold The threshold is set to be the same as the value of N, and N UEs are migrated to the second network device.

In addition, the first network device may determine N UEs that need to be migrated to the second network device based on the total number and the number of UEs currently managed by the other at least one network device. For example, multiple network devices obtain an average number of UEs managed by each network device according to the number of UEs managed by themselves, and determine the average number as N UEs that the first network device needs to migrate. It can be seen that the first network device determines the number of UEs to be migrated according to the total number of managed UEs.

In step 103, the first network device migrating the N UEs to the second network device includes: first, the first network device changes the network connection statuses between the N UEs and the first network device from The active state becomes the deactivated state; wherein, the network connection state is used to represent whether the UE is in the active state. Specifically, the first network device receives the re-registration request from the UE, responds and sends a message to the core network. Through signaling interaction with the core network, the network connection state between the UE and the first network device is changed from an activated state to a deactivated state.

Next, based on the priority order of the first network device and the second network device; wherein, the second network device has the highest priority; send a control message to N UEs, where the control message is used to control the N UEs The UE is connected to the second network device. Specifically, the first network device sets the processing priority of the second network device to the highest when determining that the second network device is switched from the failover to the normal working state. In this way, the processing priority of the second network device is higher than that of the first network device. The first network device sends a control message to the N UEs that need to be migrated, so that the N UEs are migrated to the network device with the highest processing priority, that is, to the second network device. First, the first network device makes N UEs determined to be migrated into a deactivated state to prepare for subsequent migration. Then, according to the determined processing priorities of the first network device and the second network device, a control message is sent to the N UEs, so that the N UEs are migrated to the second network device.

Embodiment three,

In the following, the method for load balancing of network devices according to the embodiment of the present invention will be described in detail by taking SBC load balancing in an IMS network as an example.

Here, there are three SBCs in one SBC POOL, namely SBC1, SBC2 and SBC3. Each SBC carries a total of 20,000 local and roaming UEs. After the failure of SBC1, the UEs carried by SBC1 are transferred to SBC2 and SBC3. As shown in Figure 2, after SBC1 recovers from the fault, it reconnects to the network and takes over the service.

Here, SBC2 and SBC3 may migrate N UEs larger than the preset threshold to SBC1 based on the total number of UEs; or, SBC2 and SBC3 may obtain a preset threshold based on the total number of UEs, and the preset threshold is related to the N value. In the same way, N UEs are migrated to SBC1. In addition, according to the number of UEs managed by the SBC2 and SBC3 devices, the average number of UEs managed by each network device is obtained, and the average number is determined as the N UEs that need to be migrated by SBC2 and SBC3. Specifically, SBC2 and SBC3 will determine 10,000 UEs to be migrated to SBC1 according to the 30,000 UEs managed by themselves, and migrate these 10,000 UEs to SBC1.

After SBC2 and SBC3 determine to relocate the UE to the fault-recovered SBC1, the load balancing switch should be turned on first, and the UE to be relocated this time is determined to be a local and/or roaming communication type. In addition, the processing priority of each SBC in the SBC POOL needs to be adjusted, and the processing priority of SBC1 whose working state is switched from the failover to the normal working state is set to be the highest.

As shown in FIG. 3 , it is a detailed flow of the SBC load balancing method according to the embodiment of the present invention. Specific steps include:

Step 301: UE sends a registration request to SBC2;

Here, the UE will periodically send a registration request to the SBC, regardless of whether the UE has established a connection relationship with the SBC, which is a normal connection verification behavior, and generally initiates a registration request once an hour. The target UE is a UE that has established a connection relationship with the SBC2 and needs to be migrated.

Step 302: SBC2 responds to the registration request of the target UE, and sends a message to a Serving Call Session Control Function (Serving Call Session Control Function, S-CSCF).

Here, SBC2 responds to the registration request of the target UE, and when the number of migrating UEs in SBC2 does not reach the set number of UEs that need to be relocated, SBC2 will send a MESSAGE to the S-CSCF. Among them, the message body of MESSAGE is sbc-restoration in Extensible Markup Language (XML), that is, SBC2 sends a deactivation message to the network, so that the registered target UE starts the deactivation process with SBC2. At the same time, the SBC2UE statistics counter is incremented by 1.

In addition, if the target UE sends a registration request to SBC2 while SBC2 is processing other requests with the target user, then SBC2 will not send a MESSAGE to the S-CSCF.

Step 303: the target UE and the SBC2 realize a deactivated state;

Here, the S-CSCF sends a Server Assignment Request (SAR) to the Home Subscriber Server (HSS), which contains information such as a proxy call session control function (Proxy CallSession Control Function, P-CSCF) remark indication and other information . Next, the S-CSCF sets the registration status of the target UE to unregistered after receiving the Server Assignment Answer (SAA). After receiving the SAR request, the HSS sends an Insert Subscriber Data Request (IDR) message to a mobility management node (Mobility Management Entity, MME), which carries the P-CSCF re-note indication information. After receiving the IDR message carrying the P-CSCF re-registration indication information, it sends a bearer deactivation message to the target UE and instructs the re-establishment. Next, the target UE sends a re-establishment request. The MME is a network element in a 4G core network (Evolved Packet Core, EPC).

Step 304: Send a registration request to SBC1 to establish a connection.

Here, according to the processing priority of each SBC in the SBC POOL, after receiving the control message, the target UE sends a registration message to the SBC1 with the highest priority, and establishes a connection with the SBC1.

In this way, the target UE is migrated from SBC2 and SBC3 to SBC1. When SBC2 and SBC3 reach the preset number of UEs to be migrated, load balancing processing is no longer performed, and the processing priority of each SBC in the SBC POOL will also be processed. Adjust to the state before the failure of SBC1, and turn off the switch of load balancing of SBC2 and SBC3.

Embodiment four,

In order to realize the method for load balancing of network equipment, an embodiment of the present invention also provides a network equipment load balancing device. The schematic diagram of the composition structure of the device is shown in FIG. and migration module 44; wherein,

The judging module 41 is configured to, based on the device state of the second network device, determine that the second network device is switched from a failover to a normal working state; wherein, the device state is used to represent whether the second network device is in a normal working state;

The obtaining module 42 is used to obtain the total number of UEs managed by itself;

The determining module 43 is configured to determine, based on the total number, N UEs that need to be migrated to the second network device; N is a positive integer;

The migration module 44 is configured to migrate the N UEs to the second network device.

Here, the discrimination module 41 is specifically used for:

Acquire the device status of at least one second network device, and determine the target second network device in the at least one second network device that is switched from a failover to a normal working state;

setting the processing priority of the target second network device to the highest;

Correspondingly, the relocation module 44 is further configured to relocate the N UEs to the target second network device.

Here, the network device refers to a device used to bear the UE in the network. The first network device is a normally working network device. In addition, the judging module 41 further includes a start function, which is used to start the switch of load balancing after it is determined that the second network device is switched from the failover to the normal working state. Here, the starting module may automatically turn on the switch of load balancing; or, may send the status information of the normal operation of the second network device to the user, and start the switch of load balancing manually.

Wherein, the determining module 43 is specifically used for:

obtaining a load balancing mode; wherein the load balancing mode is used to indicate the communication type of the UE that needs to be migrated by the first network device;

Based on the load balancing manner, N UEs that need to be migrated to the second network device are determined.

Here, the load balancing modes include local and roaming. Before migrating the UE, the load balancing mode of the UE to be migrated should be determined first.

Further, the determining module 43 is specifically used for:

Based on the total number of UEs, a preset threshold is obtained, and based on the preset threshold, N UEs that need to be migrated to the second network device are determined; N UEs are migrated to the second network device; or, the determining module 43 may obtain a preset threshold based on the total number of UEs, where the preset threshold is the same as the value of N, and migrate the N UEs to the second network device.

In addition, based on the total number and the number of UEs currently managed by the other at least one network device, N UEs that need to be migrated to the second network device are determined. For example, the determining module 43 calculates the average number of UEs managed by each network device according to the number of UEs managed by each network device, and determines the average number as the N UEs that need to be migrated by the first network device.

Further, the migration module 44 is specifically used for:

Change the network connection state of the N UEs and the first network device from an active state to a deactivated state; wherein, the network connection state is used to represent whether the UE is in an active state; specifically, the migration module 44 receives the The UE's re-registration request responds and sends a message to the core network. Through signaling interaction with the core network, the network connection state between the UE and the first network device is changed from an activated state to a deactivated state.

Based on the priority order of the first network device and the second network device; wherein, the priority of the second network device is the highest; specifically, when the determining module 41 determines that the second network device is switched from a failover to a normal working state , the processing priority of the second network device is set to the highest. The migration module 44 sends a control message to the N UEs, where the control message is used to control the N UEs to connect to the second network device.

In practical applications, the discrimination module 41 , the acquisition module 42 , the determination module 43 , and the migration module 44 can all be composed of a central processing unit (Central Processing Unit, CPU), a microprocessor (MicroProcessor Unit, MPU) located in the network device, A digital signal processor (Digital Signal Processor, DSP), or a Field Programmable Gate Array (Field Programmable Gate Array, FPGA), etc. are implemented.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (6)

1. A method for network device load balancing, wherein the method comprises: Based on the device state of the second network device, it is determined that the second network device is switched from a failover to a normal working state; wherein the device state is used to represent whether the second network device is in a normal working state; Obtain the total number of user equipment UEs managed by the first network device, and determine N UEs that need to be migrated to the second network device based on the total number; N is a positive integer; The number of UEs includes: obtaining a load balancing method; wherein the load balancing method is used to indicate the communication type of the UE that needs to be migrated by the first network device; N UEs; migrating the N UEs to the second network device; the migrating the N UEs to the second network device includes: connecting the N UEs to the network of the first network device The state changes from an active state to a deactivated state; wherein, the network connection state is used to represent whether the UE is in an active state; based on the priority order of the first network device and the second network device; wherein, the priority of the second network device The highest; sending a control message to N UEs, where the control message is used to control the N UEs to connect to the second network device. 2 . The method according to claim 1 , wherein the determining, based on the device state of the second network device, that the second network device is switched from a failover to a normal working state comprises: 2 . Acquire the device status of at least one second network device, and determine the target second network device in the at least one second network device that is switched from a failover to a normal working state; setting the processing priority of the target second network device to the highest; Correspondingly, the migrating the N UEs to the second network device includes: migrating the N UEs to the target second network device. 3. The method according to claim 1, wherein the determining, based on the total number, the N UEs that need to be migrated to the second network device, comprising: Based on the total number, a preset threshold is obtained, and based on the preset threshold, N UEs that need to be migrated to the second network device are determined; or, Based on the total number and the number of UEs currently managed by the other at least one network device, N UEs that need to be migrated to the second network device are determined. 4. An apparatus for network equipment load balancing, wherein the apparatus comprises: a discrimination module, an acquisition module, a determination module and a migration module; wherein, The judging module is configured to determine, based on the device state of the second network device, that the second network device is switched from a failover to a normal working state; wherein the device state is used to represent whether the second network device is in a normal working state; The obtaining module is configured to obtain the total number of UEs managed by the first network device itself; The determining module is configured to determine, based on the total number, N UEs that need to be migrated to the second network device; N is a positive integer; wherein, the determining module is specifically configured to: obtain a load balancing mode; wherein, the load The balancing mode is used to indicate the communication type of the UE that needs to be migrated by the first network device; based on the load balancing mode, N UEs that need to be migrated to the second network device are determined; The migration module is configured to migrate the N UEs to the second network device; wherein the migration module is specifically configured to: change the network connection status between the N UEs and the first network device by The active state becomes the deactivated state; wherein, the network connection state is used to represent whether the UE is in the active state; based on the priority order of the first network device and the second network device; wherein, the priority of the second network device is the highest; Sending a control message to N UEs, where the control message is used to control the N UEs to connect to the second network device. 5. The device according to claim 4, wherein the discriminating module is specifically used for: Acquire the device status of at least one second network device, and determine the target second network device in the at least one second network device that is switched from a failover to a normal working state; setting the processing priority of the target second network device to the highest; Correspondingly, the migrating the N UEs to the second network device includes: migrating the N UEs to the target second network device. 6. The device according to claim 4, wherein the determining module is specifically configured to: Based on the total number, a preset threshold is obtained, and based on the preset threshold, N UEs that need to be migrated to the second network device are determined; or, Based on the total number and the number of UEs currently managed by the other at least one network device, N UEs that need to be migrated to the second network device are determined.

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