CN109219077B - Resource selection method and device - Google Patents

Abstract

The invention relates to the technical field of mobile communication, in particular to a resource selection method and a device, aiming at solving the problem that the transmission bandwidth is increased due to the cross-equipment transmission of data messages when the existing resource selection scheme is applied to the stacking and expansion of EPC equipment, the method comprises the steps of firstly selecting a target interface from a plurality of interfaces corresponding to a plurality of EPC equipment based on a load sharing rule, then selecting the target EPC equipment from the plurality of EPC equipment based on the selected target interface, and finally selecting a local signaling processing entity and a local service processing entity of the target EPC equipment as a target signaling processing entity and a target service processing entity of the message data of a user terminal to be attached respectively, so that the signaling processing entity and the service processing entity for processing the message data are selected to be local to the target EPC equipment, the cross-equipment transmission of the message data is avoided, the transmission bandwidth is reduced, the consistency of the resource selection result is also kept, and the user experience is improved.

Description

Resource selection method and device

Technical Field

The present invention relates to the field of mobile communications technologies, and in particular, to a resource selection method and apparatus.

Background

A Long Term Evolution (LTE) system is a next generation mobile radio access system of 3GPP, and includes an Evolved Packet Core (EPC) device and an Evolved base station (ENode B, ENB), where the EPC device includes elements such as a Mobility Management Entity (MME), a Serving Gateway (SGW), and a Packet Data Gateway (PGW), and a hardware platform control of the EPC device is based on an Advanced Telecommunications Computing Architecture (ATCA).

In the current LTE network, the ue needs to perform data transmission based on the established bearer, and therefore, before performing actual service, the ue must complete a registration process, i.e., an attach process, in the network, only the ue that is successfully attached can obtain the allocated IP address, and establish a default bearer based on the allocated IP address.

Specifically, as shown in fig. 1, for a user terminal a that needs to access a network to complete attachment, a resource selection scheme used under an ATCA architecture needs to be used to complete attachment, and before the attachment is established, a Stream Control Transmission Protocol (SCTP) access flow, a General Packet Radio Service tunneling Protocol-Control Plane (GTPC) message Transmission flow, and a bearer configuration flow need to be performed.

In the SCTP access procedure in fig. 1, an ENB where a user terminal a is located is connected to an EPC device through an interface, and the system may select an interface processing unit by a next hop based on a destination service address of data uploaded by the user terminal a, and after determining the interface processing unit, select an MME signaling processing entity by using a load sharing manner through the determined interface processing unit, thereby completing a first resource selection, where the first resource selection includes selection of an interface and selection of the MME signaling processing entity.

And after the successful SCTP access of the user terminal A is determined, entering a GTPC message transmission flow, and in the GTPC message transmission flow, completing the process of selecting the SGW signaling entity by the MME signaling processing entity and selecting the PGW signaling entity by the SGW signaling entity to complete the second resource selection, wherein the second resource selection comprises the selection of the SGW signaling entity and the selection of the PGW signaling entity.

Specifically, an SGW signaling entity is selected for an MME signaling processing entity, the MME signaling processing entity needs to randomly select a service processing entity for message forwarding, and then the service processing entity selects the SGW signaling entity; aiming at the process of selecting a PGW signaling entity by an SGW signaling entity, after the SGW signaling entity is determined, the SGW signaling entity randomly selects a service processing entity to forward a message, then the service processing entity selects the PGW signaling entity,

after the GTPC message transmission process is determined to be completed, entering a bearer configuration process of the user terminal a, in the bearer configuration process, selecting a service processing entity by a PGW signaling entity to configure bearer information, and selecting the service processing entity by an SGW signaling entity to configure the bearer information, thereby completing a third resource selection, wherein the third resource selection includes selecting the service processing entity by the PGW signaling entity and selecting service processing by the SGW signaling entity.

And after the completion of the bearer configuration flow is confirmed, the attachment process of the user terminal A is completed.

However, in order to meet the requirements of various products, the EPC device often needs to be expanded, and currently, the expansion of the EPC device has the following two ways:

the first method is as follows: as shown in fig. 2, a signaling board a, an interface board, a signaling board B, and a service board are added to the service processor frame of the EPC device after capacity expansion, compared to the service processor frame of the original EPC device.

Specifically, under the ATCA architecture, a signaling board a, a signaling board B, a service board, and an interface board all perform resource allocation in a load sharing manner, and the interface board is separately deployed and provides 8 to 12 outgoing incoming interfaces, where incoming data is forwarded to each signaling board and service board through a switch board, that is, each service flow is forwarded through the switch board, for example, the interface board sends a data packet to the signaling board, and the actual process is as follows: the interface board sends the data message to the exchange board, and then the exchange board forwards the data message to the signaling board.

In the first mode, the existing resource selection process basically does not cause influence.

The second method comprises the following steps: stacking a plurality of EPC devices with independent bureaus, wherein one EPC device can independently bureau, that is, the EPC device can provide an interface for outgoing and incoming, and deploy all signaling entities, service processing entities and interface processing units, as shown in fig. 3, the original EPC device is composed of one EPC device, and the capacity-expanded EPC device is composed of an EPC device A to an EPC device X.

Specifically, for a data packet that needs to be processed across devices, for example, the data packet is transferred from a signaling entity of EPC device a to a signaling entity of EPC device B, the signaling entity of EPC device a needs to be sent to an interface processing unit of EPC device a, then the interface processing unit of EPC device a sends to an interface processing unit of EPC device B, and finally the interface processing unit of EPC device B sends to the signaling entity of EPC device B.

However, in the second method, not only the overall transmission bandwidth is affected by multiple inter-device transmissions, but also, for the case of inter-device processing, since there are multiple signaling entities of a single EPC device and the existing resource selection process is performed in steps, there may be a case where resource selection is inconsistent for different sub-resource selection processes (e.g., an SCTP access process and a GTPC message transmission process).

For example, assume that a capacity-expanded EPC device is composed of an EPC device 1 and an EPC device 2, where a signaling entity of the capacity-expanded EPC device includes a signaling entity a and a signaling entity B, the EPC device 1 includes a signaling entity a1 and a signaling entity B1, and the EPC device 2 includes a signaling entity a2 and a signaling entity B2, and it is assumed that a data message X needs to be transferred from the signaling entity a of the capacity-expanded EPC device to the signaling entity B, in an existing resource selection procedure, if a selected signaling entity a is the signaling entity a1 of the EPC device 1 in a first resource selection, for a second resource selection, it is very likely that the signaling entity a1 of the EPC device 1 is not selected, but the signaling entity a2 of the EPC device 2 is selected.

Obviously, if the second resource selection result is the signaling entity a2 of the EPC device 2, then the two resource selection results are not identical (not on the same EPC device), and the post-maintenance may be difficult.

Therefore, the existing resource selection scheme is not applicable to all capacity expansion schemes, and in view of the capacity expansion scheme of EPC device stacking, the embodiment of the present invention provides a new resource selection method to overcome the above-mentioned defects.

Disclosure of Invention

The embodiment of the invention provides a resource selection method, which is used for solving the problem that transmission bandwidth is increased due to cross-device transmission of data messages when the existing resource selection scheme is applied to EPC (evolved packet core) device stacking capacity expansion.

The embodiment of the invention provides the following specific technical scheme:

a resource selection method is applied to a stacking capacity expansion scene of a plurality of evolution packet core network EPC devices, and comprises the following steps:

based on a load sharing rule, selecting one interface from a plurality of interfaces corresponding to the EPC equipment as a target interface corresponding to the message data of the user terminal to be attached;

selecting one EPC device from the plurality of EPC devices as a target EPC device based on the target interface;

selecting a local signaling processing entity of the target EPC equipment as a target signaling processing entity corresponding to the user terminal to be attached; and

and selecting the local service processing entity of the target EPC equipment as the target service processing entity corresponding to the user terminal to be attached.

Optionally, selecting one EPC device from the plurality of EPC devices as a target EPC device based on the target interface includes:

if the number of the EPC equipment is equal to that of the interfaces and one interface corresponds to one EPC equipment, determining the EPC equipment corresponding to the target interface as target EPC equipment;

if the number of the EPC devices is larger than that of the interfaces and one interface corresponds to one EPC device, determining the EPC device corresponding to the target interface as a candidate EPC device, and selecting one EPC device from the EPC devices associated with the candidate EPC device as the target EPC device based on a preset weight rule, wherein the EPC devices associated with the candidate EPC device at least comprise the candidate EPC device and all EPC devices without interfaces.

Optionally, based on a preset weight rule, selecting one EPC device from a plurality of EPC devices associated with the candidate EPC device as a target EPC device includes:

determining a number of EPC devices associated with the candidate EPC devices and numbering the number of EPC devices based on the number and determining a weighting cardinality based on the number;

determining the IP address of the message data of the user terminal to be attached, and executing an exclusive OR operation on the IP address to obtain an exclusive OR result;

performing a remainder operation on the weight base number by using the XOR result to obtain a parameter value;

and determining the EPC equipment corresponding to the number meeting the parameter value as target EPC equipment.

Optionally, determining an IP address of the packet data of the user terminal to be attached, and performing an exclusive or operation on the IP address to obtain an exclusive or result, including:

determining the IP address of the message data of the user terminal to be attached;

segmenting the IP address to obtain a plurality of segment addresses;

and sequentially executing XOR operation on the plurality of sections of addresses according to bits to obtain an XOR result.

Optionally, selecting the local signaling processing entity of the target EPC device as the target signaling processing entity corresponding to the user terminal to be attached includes:

selecting a local Mobility Management Entity (MME) of the target EPC equipment as a corresponding target MME in a Stream Control Transmission Protocol (SCTP) access flow of the user terminal to be attached; and

selecting the local Service Gateway (SGW) of the target EPC equipment as a corresponding target SGW of the user terminal to be attached in a general packet radio service tunneling protocol (GTPC) message transmission flow; and

and selecting the local packet data gateway (PGW) of the target EPC device as a corresponding target PGW of the user terminal to be attached in the GTPC message transmission flow.

Optionally, selecting the local service processing entity of the target EPC device as the target service processing entity corresponding to the user terminal to be attached includes:

selecting a local service processing entity of the target EPC equipment as a corresponding target service processing entity of the user terminal to be attached in the GTPC message transmission flow; and

and selecting the local service processing entity of the target EPC equipment as a corresponding target service processing entity of the user terminal to be attached in the bearing configuration flow.

A resource selection device is applied to a stacking and capacity-expanding scene of a plurality of evolution packet core network EPC equipment, and comprises the following components:

a first selecting unit, configured to select one interface from multiple interfaces corresponding to the multiple EPC devices based on a load sharing rule, where the selected interface is used as a target interface corresponding to message data of a user terminal to be attached;

a second selecting unit, configured to select one EPC device from the plurality of EPC devices as a target EPC device based on the target interface;

a third selecting unit, configured to select a local signaling processing entity of the target EPC device as a target signaling processing entity corresponding to the to-be-attached user terminal; and selecting the local service processing entity of the target EPC equipment as the target service processing entity corresponding to the user terminal to be attached.

Optionally, based on the target interface, when one EPC device is selected from the plurality of EPC devices as a target EPC device, the second selecting unit is configured to:

if the number of the EPC equipment is equal to that of the interfaces and one interface corresponds to one EPC equipment, determining the EPC equipment corresponding to the target interface as target EPC equipment;

if the number of the EPC devices is larger than that of the interfaces and one interface corresponds to one EPC device, determining the EPC device corresponding to the target interface as a candidate EPC device, and selecting one EPC device from the EPC devices associated with the candidate EPC device as the target EPC device based on a preset weight rule, wherein the EPC devices associated with the candidate EPC device at least comprise the candidate EPC device and all EPC devices without interfaces.

Optionally, when one EPC device is selected as a target EPC device from a plurality of EPC devices associated with the candidate EPC device based on a preset weight rule, the second selecting unit is configured to:

determining a number of EPC devices associated with the candidate EPC devices and numbering the number of EPC devices based on the number and determining a weighting cardinality based on the number;

determining the IP address of the message data of the user terminal to be attached, and executing an exclusive OR operation on the IP address to obtain an exclusive OR result;

performing a remainder operation on the weight base number by using the XOR result to obtain a parameter value;

and determining the EPC equipment corresponding to the number meeting the parameter value as target EPC equipment.

Optionally, the second selecting unit is configured to determine an IP address of the packet data of the user terminal to be attached, perform an exclusive or operation on the IP address, and when an exclusive or result is obtained, to:

determining the IP address of the message data of the user terminal to be attached;

segmenting the IP address to obtain a plurality of segment addresses;

and sequentially executing XOR operation on the plurality of sections of addresses according to bits to obtain an XOR result.

Optionally, when the local signaling processing entity of the target EPC device is selected as the target signaling processing entity corresponding to the user terminal to be attached, the third selecting unit is configured to:

selecting a local Mobility Management Entity (MME) of the target EPC equipment as a corresponding target MME in a Stream Control Transmission Protocol (SCTP) access flow of the user terminal to be attached; and

selecting the local Service Gateway (SGW) of the target EPC equipment as a corresponding target SGW of the user terminal to be attached in a general packet radio service tunneling protocol (GTPC) message transmission flow; and

and selecting the local packet data gateway (PGW) of the target EPC device as a corresponding target PGW of the user terminal to be attached in the GTPC message transmission flow.

Optionally, when the local service processing entity of the target EPC device is selected as the target service processing entity corresponding to the user terminal to be attached, the third selecting unit is configured to:

selecting a local service processing entity of the target EPC equipment as a corresponding target service processing entity of the user terminal to be attached in the GTPC message transmission flow; and

and selecting the local service processing entity of the target EPC equipment as a corresponding target service processing entity of the user terminal to be attached in the bearing configuration flow.

In the embodiment of the invention, the target interface is selected from the plurality of interfaces corresponding to the EPC equipment based on the load sharing rule, then the target EPC equipment is selected from the plurality of EPC equipment based on the selected target interface, and finally the local signaling processing entity and the local service processing entity of the target EPC equipment are respectively selected as the target signaling processing entity and the target service processing entity of the message data of the user terminal to be attached.

Drawings

Fig. 1 is a schematic diagram of an attach process of a ue to be attached according to an embodiment of the present invention;

fig. 2 is a schematic expansion diagram of an EPC equipment plug board according to an embodiment of the present invention;

FIG. 3 is a schematic diagram illustrating EPC equipment stacking expansion according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a first EPC device stacking capacity expansion scenario according to an embodiment of the present invention;

FIG. 5 is a schematic diagram illustrating a second EPC device stacking expansion according to an embodiment of the present invention;

FIG. 6 is a flowchart of a first resource selection method according to an embodiment of the present invention;

FIG. 7 is a diagram illustrating a first example of a resource selection method according to an embodiment of the present invention;

FIG. 8 is a flowchart illustrating a second resource selection method according to an embodiment of the present invention;

FIG. 9 is a diagram illustrating a second exemplary method for selecting resources according to an embodiment of the present invention;

FIG. 10 is a flowchart illustrating a second method for selecting resources according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a resource selection apparatus according to an embodiment of the present invention.

Detailed Description

In order to solve the problem that transmission bandwidth is increased due to the fact that data messages are transmitted across devices when the existing resource selection scheme is applied to EPC device stacking capacity expansion, a resource selection method is redesigned in the embodiment of the invention.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and 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, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The scheme of the present invention will be described in detail by way of specific examples, but the present invention is not limited to the following examples.

In the embodiment of the present invention, an Evolved Packet Core (EPC) device stacking and capacity expansion scenario is specifically shown in fig. 4, a Core network after capacity expansion is formed by two EPC devices, each EPC device corresponds to an interface and is connected to a router through the interface, and a plurality of user terminals are connected to the router through a plurality of Evolved base stations (ENode B, ENB) where the user terminals are located, and then are accessed to corresponding EPC devices through corresponding interfaces.

However, not all EPC devices have interfaces and are connected to the router through interfaces, and in particular, as shown in fig. 5, the router is connected to four EPC devices through two interfaces, and in particular, for an EPC device having an interface, an outgoing incoming operation of data may be performed through an interface, and for an EPC device having no interface, an outgoing incoming operation of data may be performed by associating with an EPC device having an interface.

Therefore, in the embodiment of the present invention, different resource selection methods are respectively provided for two situations, that is, in a scenario where a plurality of EPC devices are stacked and expanded, where all EPC devices have interfaces, that is, the number of EPC devices is equal to the number of interfaces, and one interface corresponds to one EPC device, and where some EPC devices have interfaces, that is, the number of EPC devices is greater than the number of interfaces, and one interface corresponds to one EPC device.

Referring to fig. 6, in the embodiment of the present invention, for an EPC device stacking capacity expansion scenario in which all EPC devices have interfaces, a resource selection method provided in the embodiment of the present invention has the following flow:

step 600: based on the load sharing rule, one interface is selected from a plurality of interfaces corresponding to a plurality of EPC devices and is used as a target interface corresponding to the message data of the user terminal to be attached.

Specifically, in order to complete the attachment of the expanded core network to the user terminal to be attached, firstly, message data is sent to the router through the eNB where the user terminal to be attached is located, and after the router receives the message data, the resource management module selects one interface from the plurality of interfaces as a target interface corresponding to the message data of the user terminal to be attached based on a load sharing rule, where the load sharing rule is based on a load sharing principle to enable each EPC device to share corresponding loads as uniformly as possible.

For example, as shown in fig. 7, the expanded "core network 1" is composed of "EPC device 1, EPC device 2, and EPC device 3", and each EPC device is formed separately, where "EPC device 1" corresponds to "interface 1", "EPC device 2" corresponds to "interface 2", and "EPC device 3" corresponds to "interface 3", an existing terminal M uploads message data through "eNB 1", and if "interface 1" of "EPC device 1" has access to 30 user terminals, "interface 2" of "EPC device 2" has access to 34 user terminals, and "interface 3" of "EPC device 3" has access to 25 user terminals, the terminal M can be accessed to "interface 3" based on a load sharing rule of the interfaces, that is, the "interface 3" is selected as a target interface.

Step 610: and selecting the EPC equipment corresponding to the target interface as the target EPC equipment.

Specifically, in this embodiment, since all EPC devices have interfaces and the resource selection is performed in step 600 based on the load sharing rule of the interfaces, there is no phenomenon that the EPC devices are omitted, and based on this, the resource management module may directly select the EPC device corresponding to the target interface as the target EPC device.

For example, continuing with the above example, after determining that "interface 3" is the target interface, the "EPC device 3" corresponding to "interface 3" may be directly selected as the target EPC device.

Step 620: and selecting the local service processing entity of the target EPC equipment as the target service processing entity corresponding to the user terminal to be attached.

Specifically, referring to the attachment process of the to-be-attached user terminal shown in fig. 1, after selecting an interface for the packet data of the to-be-attached user terminal, the resource Management module continues to select a Mobility Management Entity (MME) in the Stream Control Transmission Protocol (SCTP) access flow, so as to avoid cross-device Transmission of the packet, and therefore, a local MME of the target EPC device is selected as a target MME corresponding to the to-be-attached user terminal in the SCTP access flow.

For example, continuing with the above example, since "interface 1" is selected to be incoming, i.e., "EPC device 1" is selected, "MME 1" of "EPC device 1" is selected as the target MME corresponding to terminal M.

Further, if the SCTP access procedure of the terminal M is successful, the terminal M continues to enter a General Packet Radio Service tunneling Protocol-Control Plane (GTPC) message transmission procedure.

Because the message data cannot be directly transmitted to the Serving Gateway (SGW) by the MME, but is forwarded by the service processing entity, in order to avoid the cross-device transmission of the message data, the service processing entity that forwards the message data and the SGW that receives the message data need to be selected by the resource management module.

Therefore, further, after the resource management module selects the target MME, the local service processing entity of the target EPC device is selected as the target service processing entity corresponding to the user terminal to be attached in the GTPC message transmission flow, and the local SGW of the target EPC device is selected as the target SGW corresponding to the user terminal to be attached in the GTPC message transmission flow.

For example, continuing with the above example, after determining that the SCTP access procedure of the terminal M is successful, the resource management module selects "service processing entity 1-1" of "EPC device 1" as a target service processing entity for performing a distribution task between the target MME and the target SGW in the GTPC message transmission procedure of the terminal M, and selects "SGW 1" of "EPC device 1" as the target SGW for receiving the distribution task.

Similarly, because the transmission of the Packet Data between the SGW and the Packet Data Network Gateway (PGW) is also forwarded by the service processing entity.

Therefore, further, the resource management module selects the local service processing entity of the target EPC device as the target service processing entity between the target SGW and the target PGW, and selects the local PGW of the target EPC device as the target PGW corresponding to the user terminal to be attached in the GTPC message transmission flow.

For example, continuing with the above example, after the target SGW of the terminal M is selected, the resource management module selects "service processing entity 1-2" of "EPC device 1" as the target service processing entity for performing the distribution task between the target SGW and the target PGW in the GTPC message transmission flow of the terminal M, and selects "PGW 1" of "EPC device 1" as the target PGW for receiving the distribution task.

Still further, after determining that the GTPC message transmission flow of the user terminal to be attached is successful, entering a bearer configuration flow, no matter in PGW or SGW, in the embodiment of the present invention, the bearer configuration task cannot be directly executed, but the configuration is performed through the service processing entity.

Therefore, further, before the target PGW and the target SGW perform bearer configuration information, the resource management module selects a target processing entity for the target PGW and the target SGW to configure the bearer information, specifically, selects a local service processing entity of the target EPC device as a target service processing entity corresponding to the user terminal to be attached in the bearer configuration flow.

For example, continuing with the above example, after determining that the GTPC message transmission flow is successful, the resource management module selects "service processing entity 1-3" of "EPC device 1" as "PGW 1" to configure bearer information, and selects "service processing entity 1-4" of "EPC device 1" as "SGW 1" to configure bearer information.

Referring to fig. 8, in the embodiment of the present invention, for an EPC device stacking capacity expansion scenario in which a part of EPC devices have interfaces, a resource selection method provided in the embodiment of the present invention includes the following flows:

step 800: based on the load sharing rule, one interface is selected from a plurality of interfaces corresponding to a plurality of EPC devices and is used as a target interface corresponding to the message data of the user terminal to be attached.

Specifically, in order to complete the attachment of the expanded core network to the user terminal to be attached, firstly, message data is sent to the router through the eNB where the user terminal to be attached is located, and after the router receives the message data, the resource management module selects one interface from the plurality of interfaces as a target interface corresponding to the message data of the user terminal to be attached based on a load sharing rule, where the load sharing rule is based on a load sharing principle to enable each EPC device to share corresponding loads as uniformly as possible.

For example, as shown in fig. 9, the expanded "core network 2" is composed of "EPC device 1, EPC device 2, EPC device 3, EPC device 4, and EPC device 5", and each EPC device is formed separately, where there is no interface between "EPC device 1" corresponding to "interface 1", and "EPC device 2" corresponding to "interface 2", "EPC device 3", "EPC device 4", and "EPC device 5", and the existing terminal Y uploads message data through "eNB 4", and if "interface 1" of "EPC device 1" has access to 67 user terminals and "interface 2" of "EPC device 2" has access to 50 user terminals at this time, the terminal Y can be accessed to "interface 2" based on a load sharing rule of the interfaces, that is, "interface 2" is selected as a target interface.

Step 810: determining EPC equipment corresponding to a target interface as candidate EPC equipment, and selecting one EPC equipment from a plurality of EPC equipment associated with the candidate EPC equipment as the target EPC equipment based on a preset weight rule, wherein the plurality of EPC equipment associated with the candidate EPC equipment at least comprises the candidate EPC equipment and all EPC equipment without interfaces.

Specifically, in this embodiment, since not all EPC devices have interfaces, and step 800 performs resource selection based on the load sharing rule of the interfaces, the "EPC device 3", the "EPC device 4", and the "EPC device 5" that do not have interfaces are not selected, which causes resource waste, and this may cause all enbs to be concentrated on the "EPC device 1" and the "EPC device 2", and increase loads of the "EPC device 1" and the "EPC device 2".

Further, for the message data of the user terminal to be attached, after being uploaded to the router through the eNB, only the expanded core network can be accessed through the interface, and as to which EPC device is to process the subsequent message data, resource selection may be performed again based on the target interface.

Specifically, firstly, the EPC device corresponding to the target interface is determined as a candidate EPC device, and then, based on a preset weight rule, one EPC device is selected from a plurality of EPC devices associated with the candidate EPC device as the target EPC device, where the plurality of EPC devices associated with the candidate EPC device at least include the candidate EPC device and all EPC devices having no interface.

For example, as shown in fig. 9, for the message data uploaded to the router, there are two resource selection manners for "interface 1" and "interface 2", if the resource management module selects "interface 1", it may be determined that "EPC device 1" is a candidate EPC device, and based on a preset weight rule, one EPC device is selected as a target EPC device from "EPC device 1", "EPC device 3", "EPC device 4", and "EPC device 5"; if the resource management module selects "interface 2", it may determine that "EPC device 2" is a candidate EPC device, and select one EPC device from "EPC device 2", "EPC device 3", "EPC device 4", and "EPC device 5" as a target EPC device based on a preset weight rule.

Further, first, a number of EPC devices associated with the candidate EPC devices is determined, and the number of EPC devices is numbered based on the number, and a weight cardinality is determined based on the number.

And then, determining the IP address of the message data of the user terminal to be attached, performing an exclusive-or operation on the IP address to obtain an exclusive-or result, specifically, determining the IP address of the message data of the user terminal to be attached, segmenting the IP address to obtain a plurality of segment addresses, and sequentially performing the exclusive-or operation on the plurality of segment addresses according to bits to obtain the exclusive-or result.

And after the XOR result is obtained, performing remainder operation on the determined weight base number by adopting the XOR result to obtain a parameter value, and finally determining the EPC equipment corresponding to the number conforming to the parameter value as the target EPC equipment.

For example, continuing with the example in step 800, because "interface 2" is the target interface, "EPC device 2" is selected as the candidate EPC device, and since several EPC devices associated with "EPC device 2" include "EPC device 2," "EPC device 3," "EPC device 4," and "EPC device 5," the number is determined to be "4," the "EPC device 2," "EPC device 3," "EPC device 4," and "EPC device 5" are numbered respectively based on the number 4, the numbering result is "N0," "N1," "N2," and "N3," and the number "4" is determined to be the weighting base "4";

further, assuming that the IP address of the message data uploaded by the user terminal to be attached is "192.168.100.1", segmenting the message data to obtain segmentation results "192", "168", "100" and "1", sequentially performing an exclusive or operation on "192", "168", "100" and "1" in bits, that is, performing an exclusive or operation on "11000000" exclusive or "10101000" exclusive or "01100100" exclusive or "00000001", obtaining an exclusive or result "01101000", and converting the result into a decimal "13";

further, the remainder of the xor result "13" to the weight base "4" is subjected to a remainder operation to obtain a parameter value "1", and since the remainder of the xor result "13" to the weight base "4" includes "0, 1, 2, and 3", and the number corresponding to the parameter value "1" is determined to be "N1", and the EPC device corresponding to the parameter value "N1" is "EPC device 3", the "EPC device 3" is determined to be the target EPC device.

Certainly, when the resource management module selects resources for a plurality of user terminals to be attached respectively based on the preset weight rule, the serial numbers of the EPC devices should be kept consistent.

Step 820: and selecting the local service processing entity of the target EPC equipment as the target service processing entity corresponding to the user terminal to be attached.

Specifically, as in the embodiment provided in step 620, to avoid the cross-device transmission of the packet, the resource management module selects the local MME of the target EPC device as the target MME corresponding to the to-be-attached user terminal in the SCTP access procedure.

For example, continuing with the above example, if "EPC device 3" is selected as the target EPC device, the "MME 3" of "EPC device 3" is selected as the target MME corresponding to terminal Y.

If the SCTP access procedure of the terminal Y is successful, the GTPC message transmission procedure is continued, and since the packet data cannot be directly transmitted to the SGW by the MME but is forwarded by the service processing entity, in order to avoid the cross-device transmission of the packet data, a target service processing entity that forwards the packet data and a target SGW that receives the packet data need to be selected by the resource management module.

Therefore, further, after the resource management module selects the target MME, the local service processing entity of the target EPC device is selected as the target service processing entity corresponding to the user terminal to be attached in the GTPC message transmission flow, and the local SGW of the target EPC device is selected as the target SGW corresponding to the user terminal to be attached in the GTPC message transmission flow.

For example, continuing with the above example, after determining that the SCTP access procedure of terminal Y is successful, the resource management module selects "service processing entity 3-1" of "EPC device 3" as a target service processing entity for performing a distribution task between the target MME and the target SGW in the GTPC message transmission procedure of terminal Y, and selects "SGW 3" of "EPC device 3" as the target SGW for receiving the distribution task.

Similarly, the transmission of the message data between the SGW and the PGW also needs to be forwarded by the service processing entity.

Therefore, further, the resource management module selects the local service processing entity of the target EPC device as the target service processing entity between the target SGW and the target PGW, and selects the local PGW of the target EPC device as the target PGW corresponding to the user terminal to be attached in the GTPC message transmission flow.

For example, continuing with the above example, after the target SGW of terminal Y is selected, the resource management module selects "service processing entity 3-2" of "EPC device 3" as the target service processing entity for performing the distribution task between the target SGW and the target PGW in the GTPC message transmission flow of terminal Y, and selects "PGW 3" of "EPC device 3" as the target PGW for receiving the distribution task.

Still further, after determining that the GTPC message transmission flow of the user terminal to be attached is successful, entering a bearer configuration flow, no matter in PGW or SGW, in the embodiment of the present invention, the bearer configuration task cannot be directly executed, but the configuration is performed through the service processing entity.

Therefore, further, before the target PGW and the target SGW perform bearer configuration information, the resource management module selects a target processing entity for the target PGW and the target SGW to configure the bearer information, specifically, selects a local service processing entity of the target EPC device as a target service processing entity corresponding to the user terminal to be attached in the bearer configuration flow.

For example, continuing with the above example, after determining that the GTPC message transmission flow is successful, the resource management module selects "service processing entity 3-3" of "EPC device 3" as "PGW 3" to configure bearer information, and selects "service processing entity 3-4" of "EPC device 3" as "SGW 3" to configure bearer information.

In the following, an embodiment of the second resource selection method of the present invention is further described in detail with reference to a specific implementation scenario, and specifically, referring to fig. 10, in the embodiment of the present invention, for an attached user terminal, a distribution policy exists, and after the user terminal uploads packet data, the packet data can be directly forwarded to a target signaling processing entity based on an established bearer, whereas for a user terminal to be attached, and for a user terminal to which a distribution policy does not exist, resource selection needs to be performed based on the resource selection method provided by the present invention.

Furthermore, the resource information refers to information of a signaling processing entity and a service processing entity included in one EPC device, the first type of EPC device refers to an EPC device with an interface, and the second type of EPC device refers to an EPC device without an interface.

Based on the foregoing embodiments, referring to fig. 11, in an embodiment of the present invention, a resource selection apparatus, which is applied to a scenario of stacking and expanding a plurality of EPC devices, includes at least a first selection unit 110, a second selection unit 111, and a third selection unit 112, where,

a first selecting unit 110, configured to select, based on a load sharing rule, one interface from multiple interfaces corresponding to the multiple EPC devices, as a target interface corresponding to message data of a user terminal to be attached;

a second selecting unit 111, configured to select one EPC device from the plurality of EPC devices as a target EPC device based on the target interface;

a third selecting unit 112, configured to select a local signaling processing entity of the target EPC device as a target signaling processing entity corresponding to the to-be-attached user terminal; and selecting the local service processing entity of the target EPC equipment as the target service processing entity corresponding to the user terminal to be attached.

Optionally, based on the target interface, when one EPC device is selected from the plurality of EPC devices as a target EPC device, the second selecting unit 111 is configured to:

if the number of the EPC equipment is equal to that of the interfaces and one interface corresponds to one EPC equipment, determining the EPC equipment corresponding to the target interface as target EPC equipment;

if the number of the EPC devices is larger than that of the interfaces and one interface corresponds to one EPC device, determining the EPC device corresponding to the target interface as a candidate EPC device, and selecting one EPC device from the EPC devices associated with the candidate EPC device as the target EPC device based on a preset weight rule, wherein the EPC devices associated with the candidate EPC device at least comprise the candidate EPC device and all EPC devices without interfaces.

Optionally, when one EPC device is selected from the multiple EPC devices associated with the candidate EPC device as a target EPC device based on a preset weight rule, the second selecting unit 111 is configured to:

determining a number of EPC devices associated with the candidate EPC devices and numbering the number of EPC devices based on the number and determining a weighting cardinality based on the number;

determining the IP address of the message data of the user terminal to be attached, and executing an exclusive OR operation on the IP address to obtain an exclusive OR result;

performing a remainder operation on the weight base number by using the XOR result to obtain a parameter value;

and determining the EPC equipment corresponding to the number meeting the parameter value as target EPC equipment.

Optionally, the second selecting unit 111 is configured to determine an IP address of the packet data of the user terminal to be attached, perform an exclusive or operation on the IP address, and when an exclusive or result is obtained, perform:

determining the IP address of the message data of the user terminal to be attached;

segmenting the IP address to obtain a plurality of segment addresses;

and sequentially executing XOR operation on the plurality of sections of addresses according to bits to obtain an XOR result.

Optionally, when the local signaling processing entity of the target EPC device is selected as the target signaling processing entity corresponding to the user terminal to be attached, the third selecting unit 112 is configured to:

selecting a local Mobility Management Entity (MME) of the target EPC equipment as a corresponding target MME in a Stream Control Transmission Protocol (SCTP) access flow of the user terminal to be attached; and

selecting the local Service Gateway (SGW) of the target EPC equipment as a corresponding target SGW of the user terminal to be attached in a general packet radio service tunneling protocol (GTPC) message transmission flow; and

and selecting the local packet data gateway (PGW) of the target EPC device as a corresponding target PGW of the user terminal to be attached in the GTPC message transmission flow.

Optionally, when the local service processing entity of the target EPC device is selected as the target service processing entity corresponding to the user terminal to be attached, the third selecting unit 112 is configured to:

selecting a local service processing entity of the target EPC equipment as a corresponding target service processing entity of the user terminal to be attached in the GTPC message transmission flow; and

and selecting the local service processing entity of the target EPC equipment as a corresponding target service processing entity of the user terminal to be attached in the bearing configuration flow.

To sum up, in the embodiments of the present invention, a target interface is selected from a plurality of interfaces corresponding to a plurality of EPC devices based on a load sharing rule, then a target EPC device is selected from a plurality of EPC devices based on the selected target interface, and finally, respectively selecting a local signaling processing entity and a local service processing entity of the target EPC equipment as a target signaling processing entity and a target service processing entity of the message data of the user terminal to be attached, therefore, once the target EPC equipment is determined, the signaling processing entity and the service processing entity for processing the message data are selected to be local to the target EPC equipment, so that the cross-equipment transmission and redundant operation of the message data are avoided, the transmission bandwidth is reduced, the consistency of a resource selection result is kept, convenience is brought to subsequent maintenance and operation, the system performance is improved, and the user experience is improved.

Moreover, because the resource selection is carried out based on the preset weight rule, the load of each EPC device is balanced, and the processing efficiency of the system is further improved.

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

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

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.

Claims (8)

1. A resource selection method is applied to a stacking capacity expansion scene of a plurality of evolution packet core network EPC devices, and is characterized by comprising the following steps:

based on a load sharing rule, selecting one interface from a plurality of interfaces corresponding to the EPC equipment as a target interface corresponding to the message data of the user terminal to be attached;

if the number of the EPC equipment is equal to that of the interfaces and one interface corresponds to one EPC equipment, determining the EPC equipment corresponding to the target interface as target EPC equipment;

if the number of the EPC devices is larger than that of the interfaces and one interface corresponds to one EPC device, determining the EPC device corresponding to the target interface as a candidate EPC device, determining the number of the EPC devices associated with the candidate EPC device, numbering the EPC devices associated with the candidate EPC device based on the number, and determining a weighting base number based on the number;

determining the IP address of the message data of the user terminal to be attached, and executing an exclusive OR operation on the IP address to obtain an exclusive OR result; performing a remainder operation on the weight base number by using the XOR result to obtain a parameter value; determining EPC equipment corresponding to the number conforming to the parameter value as target EPC equipment, wherein the plurality of EPC equipment associated with the candidate EPC equipment at least comprise the candidate EPC equipment and all EPC equipment without interfaces;

selecting a local signaling processing entity of the target EPC equipment as a target signaling processing entity corresponding to the user terminal to be attached; and

and selecting the local service processing entity of the target EPC equipment as the target service processing entity corresponding to the user terminal to be attached.

2. The method of claim 1, wherein determining the IP address of the packet data of the ue to be attached, and performing an xor operation on the IP address to obtain an xor result comprises:

determining the IP address of the message data of the user terminal to be attached;

segmenting the IP address to obtain a plurality of segment addresses;

and sequentially executing XOR operation on the plurality of sections of addresses according to bits to obtain an XOR result.

3. The method according to any one of claims 1-2, wherein selecting the local signaling processing entity of the target EPC device as the target signaling processing entity corresponding to the user terminal to be attached includes:

selecting a local Mobility Management Entity (MME) of the target EPC equipment as a corresponding target MME in a Stream Control Transmission Protocol (SCTP) access flow of the user terminal to be attached; and

selecting the local Service Gateway (SGW) of the target EPC equipment as a corresponding target SGW of the user terminal to be attached in a general packet radio service tunneling protocol (GTPC) message transmission flow; and

and selecting the local packet data gateway (PGW) of the target EPC device as a corresponding target PGW of the user terminal to be attached in the GTPC message transmission flow.

4. The method according to any one of claims 1-2, wherein selecting the local service processing entity of the target EPC device as the target service processing entity corresponding to the user terminal to be attached comprises:

selecting a local service processing entity of the target EPC equipment as a corresponding target service processing entity of the user terminal to be attached in a GTPC message transmission flow; and

and selecting the local service processing entity of the target EPC equipment as a corresponding target service processing entity of the user terminal to be attached in the bearing configuration flow.

5. A resource selection device is applied to a stacking and capacity-expanding scene of a plurality of Evolution Packet Core (EPC) devices, and is characterized by comprising the following steps:

a first selecting unit, configured to select one interface from multiple interfaces corresponding to the multiple EPC devices based on a load sharing rule, where the selected interface is used as a target interface corresponding to message data of a user terminal to be attached;

a second selecting unit, configured to determine, if the number of the EPC devices is equal to the number of the interfaces and one interface corresponds to one EPC device, an EPC device corresponding to the target interface as a target EPC device;

if the number of the EPC devices is larger than that of the interfaces and one interface corresponds to one EPC device, determining the EPC device corresponding to the target interface as a candidate EPC device, determining the number of the EPC devices associated with the candidate EPC device, numbering the EPC devices associated with the candidate EPC device based on the number, and determining a weighting base number based on the number;

determining the IP address of the message data of the user terminal to be attached, and executing an exclusive OR operation on the IP address to obtain an exclusive OR result; performing a remainder operation on the weight base number by using the XOR result to obtain a parameter value; determining EPC equipment corresponding to the number conforming to the parameter value as target EPC equipment, wherein the plurality of EPC equipment associated with the candidate EPC equipment at least comprise the candidate EPC equipment and all EPC equipment without interfaces;

a third selecting unit, configured to select a local signaling processing entity of the target EPC device as a target signaling processing entity corresponding to the to-be-attached user terminal; and selecting the local service processing entity of the target EPC equipment as the target service processing entity corresponding to the user terminal to be attached.

6. The apparatus of claim 5, wherein the second selecting unit is configured to determine an IP address of the packet data of the ue to be attached, perform an xor operation on the IP address, and when an xor result is obtained, the second selecting unit is configured to:

determining the IP address of the message data of the user terminal to be attached;

segmenting the IP address to obtain a plurality of segment addresses;

and sequentially executing XOR operation on the plurality of sections of addresses according to bits to obtain an XOR result.

7. The apparatus according to any one of claims 5 to 6, wherein when the local signaling processing entity of the target EPC device is selected as the target signaling processing entity corresponding to the user terminal to be attached, the third selecting unit is configured to:

selecting a local Mobility Management Entity (MME) of the target EPC equipment as a corresponding target MME in a Stream Control Transmission Protocol (SCTP) access flow of the user terminal to be attached; and

selecting the local Service Gateway (SGW) of the target EPC equipment as a corresponding target SGW of the user terminal to be attached in a general packet radio service tunneling protocol (GTPC) message transmission flow; and

and selecting the local packet data gateway (PGW) of the target EPC device as a corresponding target PGW of the user terminal to be attached in the GTPC message transmission flow.

8. The apparatus according to any one of claims 5 to 6, wherein when the local service processing entity of the target EPC device is selected as the target service processing entity corresponding to the user terminal to be attached, the third selecting unit is configured to:

selecting a local service processing entity of the target EPC equipment as a corresponding target service processing entity of the user terminal to be attached in a GTPC message transmission flow; and

and selecting the local service processing entity of the target EPC equipment as a corresponding target service processing entity of the user terminal to be attached in the bearing configuration flow.

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