CN102448145B

CN102448145B - Method, device and system for transmitting priority alarm information

Info

Publication number: CN102448145B
Application number: CN201010505863.6A
Authority: CN
Inventors: 于琦; 郭小龙
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2010-09-30
Filing date: 2010-09-30
Publication date: 2014-06-25
Anticipated expiration: 2030-09-30
Also published as: WO2012041136A1; CN102448145A

Abstract

The embodiment of the invention discloses a method, device and system for transmitting priority alarm information. The method for transmitting the priority alarm information comprises the following steps: obtaining a subscription data of an MTC (Machine Type Communications) device by a mobility management network element, and informing a gateway device of creating a PA (Priority Alarm) load corresponding to an APN (Access Point Name) for the MTC device, if confirming that a PA feature is activated by the APN subscribed by the MTC device according to the subscription data of the MTC device, so that PA information is transmitted to an MTC server corresponding to the APN by the MTC device through the PA load. Based on the technical scheme of the embodiment of the invention, the PA information can be flexibly and efficiently transmitted by the MTC device.

Description

Method, equipment and system for transmitting priority alarm information

Technical Field

The invention relates to the technical field of communication, in particular to a method, equipment and a system for transmitting priority alarm information.

Background

Machine Type Communications (MTC) applications refer to network Communications between one or more network elements without human involvement, such as traffic control and management, remote meter reading, remote monitoring, mobile payment, location tracking, medical monitoring, and other applications. A typical scenario for such services as remote monitoring is that a sensor node acquires environmental information and then sends the environmental data to a corresponding control node through wireless communication, and the control node performs different processing according to the environmental data.

The MTC feature defined by the standard includes the transmission of Priority Alarm (PA) information, and in some application scenarios, for example, when a certain machine type communication Device (MTC Device) is stolen or illegally used, the MTC Device may be required to transmit the relevant Alarm information to a machine type communication Server (MTC Server), and even when the MTC Device is in a service limited state such as roaming limited, location area limited, etc., the MTC Device is required to notify the PA information to the MTC Server.

At present, no specific scheme how to effectively transmit PA information exists.

Disclosure of Invention

The embodiment of the invention provides a method, equipment and a system for transmitting priority alarm information, so as to effectively transmit PA information.

In order to solve the above technical problems, embodiments of the present invention provide the following technical solutions:

a method of communicating priority alert information, comprising:

the method comprises the steps that a mobility management network element obtains subscription data of Machine Type Communication (MTC) equipment;

if the access point name APN subscribed by the MTC equipment is determined to activate the priority alarm PA characteristic according to the subscription data of the MTC equipment, notifying gateway equipment to create a PA bearer corresponding to the APN for the MTC equipment, so that the MTC equipment can transmit PA information to an MTC server corresponding to the APN through the PA bearer.

A mobility management network element comprising:

the acquisition module is used for acquiring subscription data of the Machine Type Communication (MTC) equipment;

a determining and notifying module, configured to notify a gateway device to create a PA bearer corresponding to an access point name APN for the MTC device if it is determined, according to subscription data of the MTC device, that the APN is activated for a priority alarm PA characteristic, so that the MTC device transmits PA information to an MTC server corresponding to the APN through the PA bearer.

A communication system, comprising:

the mobility management network element is used for acquiring subscription data of the Machine Type Communication (MTC) equipment; if the access point name APN subscribed by the MTC equipment is determined to activate the priority alarm PA characteristic according to the subscription data of the MTC equipment, notifying gateway equipment to establish a PA bearer corresponding to the APN for the MTC equipment;

and the gateway device is used for creating a PA bearer corresponding to the APN for the MTC device according to the notification of the mobility management network element, so that the MTC device can transmit PA information to an MTC server corresponding to the APN through the PA bearer.

As can be seen from the above, in the embodiment of the present invention, when knowing that the APN subscribed by the MTC device activates the PA feature for priority alarm, the mobility management network element notifies the gateway device to create a PA bearer corresponding to the APN for the MTC device, so that the MTC device can transmit PA information to the MTC server corresponding to the APN through the PA bearer. Based on the mechanism, the mobility management network element can create a PA bearer for the MTC equipment in advance or according to the indication of the MTC equipment, so that the MTC equipment can flexibly and effectively transmit PA information.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1-a is a schematic view of a topological connection of an SAE communication system provided by an embodiment of the present invention;

fig. 1-b is a schematic diagram of a topological connection of a WCDMA communication system provided by an embodiment of the present invention;

fig. 2 is a flowchart illustrating a method for communicating PA information according to an embodiment of the present invention;

fig. 3 is a flowchart illustrating a method for communicating PA information according to a second embodiment of the present invention;

fig. 4 is a flowchart illustrating another method for communicating PA information according to a second embodiment of the present invention;

fig. 5 is a flowchart illustrating another method for communicating PA information according to a second embodiment of the present invention;

fig. 6 is a flowchart illustrating a method for communicating PA information according to a third embodiment of the present invention;

fig. 7 is a flowchart illustrating another method for communicating PA information according to a third embodiment of the present invention;

fig. 8 is a flowchart illustrating another method for communicating PA information according to a third embodiment of the present invention;

fig. 9 is a flowchart illustrating another method for communicating PA information according to a third embodiment of the present invention;

fig. 10 is a schematic diagram of a mobility management network element according to an embodiment of the present invention;

fig. 11 is a schematic diagram of a communication system according to an embodiment of the present invention.

Detailed Description

The embodiment of the invention provides a method, equipment and a system for transmitting priority alarm information, which can effectively transmit PA information.

In order to make the technical solutions of the present invention better understood, 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.

In practical applications, 1 MTC device may subscribe to multiple Access Point Names (APNs). The subscription of the MTC device to the PA service may be based on an access point name, for example, a certain MTC device subscribes 3 APNs including APN1, APN2, and APN3(1 APN may correspond to 1 MTC server), and if the APN1 and APN3 activate the PA feature (a certain APN activates the PA feature, that is, indicates that the APN subscribes to the PA service), the MTC device needs to transmit PA information to the MTC server corresponding to APN1 and APN 3.

The mobility management network element in the embodiment of the present invention is an entity that can implement a terminal mobility management logic function, and may have different names, locations, and product forms in different networks, and the mobility management network element may refer to, for example: a Mobility Management Entity (MME) in a System Architecture Evolution (SAE) communication System, a Serving Node (SGSN) for GPRS (General Packet Radio Service) in a WCDMA (Wideband Code Division Multiple Access) communication System, an Entity with a Mobility Management logic function in a CDMA (Code Division Multiple Access) Network, an Access Service Network Gateway (ASN GW) in a worldwide interoperability for microwave Access Network, or an Entity implementing a Mobility Management logic function in other networks.

Referring to fig. 1-a, in an SAE communication system, an MTC device may access a mobility management entity MME and a Serving Gateway (SGW) of a core Network through an evolved base station (eNB) and be connected to a Packet Data Network Gateway (PGW) via an S-GW. The PGW may be connected to an MTC server in the service network.

Referring to fig. 1-b, in a WCDMA communication system, MTC devices reach a Radio Network Controller (RNC) through a base station (NodeB), then access an SGSN of a core Network, and are connected to a Gateway Node (GGSN) of GPRS through the SGSN. The GGSN may be connected to an MTC server in the service network.

Example one

One embodiment of the method for transmitting priority alarm information in the embodiment of the present invention may include: the method comprises the steps that a mobility management network element obtains subscription data of Machine Type Communication (MTC) equipment; if the APN subscribed by the MTC equipment is determined to activate the priority alarm PA characteristic according to the subscription data of the MTC equipment, the gateway equipment is informed to establish a PA bearer corresponding to the APN for the MTC equipment, so that the MTC equipment can transmit PA information to an MTC server corresponding to the APN through the PA bearer.

Referring to fig. 1, the specific steps may include:

110. the method comprises the steps that a mobility management network element acquires subscription data of MTC equipment;

in an application scenario, when subscription data of an MTC device changes (for example, the MTC device modifies a service related to an already subscribed APN or newly subscribes to an APN), or when the MTC device attaches to a network, a Home Subscriber Server (HSS) may actively issue subscription information of the subscription data of the MTC device to an MME. Of course, the mobility management network element may request the HSS for subscription data of the MTC device.

The subscription data of the MTC device may include indication information of whether the APN subscribed by the MTC device activates the PA feature, and some other information.

120. If the mobility management network element determines that the APN subscribed by the MTC equipment activates the PA (priority alarm) characteristic according to the subscription data of the MTC equipment, the mobility management network element informs the gateway equipment to create a PA (power amplifier) bearer corresponding to the APN for the MTC equipment, so that the MTC equipment transmits PA information to an MTC server corresponding to the APN through the PA bearer.

In practical application, after knowing that the APN subscribed by the MTC device activates the PA feature for priority alarm, the mobility management network element may notify the gateway device to create a PA bearer corresponding to the APN for the MTC device, so that when the MTC device subsequently has PA information corresponding to the APN to be transferred, the mobility management network element may directly transfer the PA information to the MTC server corresponding to the APN through the created PA bearer. Or, the mobility management network element may also notify the gateway device to create a PA bearer corresponding to an APN for the MTC device when the MTC device indicates that PA information of a corresponding APN (where the APN activates a PA characteristic) needs to be transferred, and the MTC device may transfer the PA information to the MTC server corresponding to the APN through the PA bearer after the PA bearer is established.

In an application scenario, before the notifying, by the mobility management network element, the gateway device to create, for the MTC device, a PA bearer corresponding to the APN may further include: and receiving the PA information transfer instruction and the APN sent by the MTC equipment. If the MTC device has PA information corresponding to a certain APN to be transferred, the MTC device may transfer the PA information transfer indication and the APN to the mobility management network element through one message (for example, through a non-access stratum message), or may transfer the PA information transfer indication and the APN to the mobility management network element through two messages, so as to notify the network side that the MTC device has PA information corresponding to the APN to be transferred, and after knowing that the MTC device has PA information corresponding to the APN to be transferred, the mobility management network element notifies the gateway device to create a PA bearer corresponding to the APN for the MTC device.

In practical application, the receiving, by the mobility management network element, the PA information transfer indication and the APN sent by the MTC device may specifically include: receiving an attach request message from MTC equipment, wherein the attach request message carries APN and PA information transfer indication; or receiving a service request message from the MTC device, wherein the service request message carries APN and PA information transfer indication; or receiving a bearer resource modification message from the MTC device, wherein the bearer resource modification message carries APN and PA information transfer indication; or receiving a Packet Data Network (PDN) connection request message from the MTC device, where the PDN connection request message carries an APN and PA information transfer indication.

The receiving, by the mobility management network element, the PA information transfer indication and the APN sent by the MTC device may also include: receiving an attach request message carrying an APN from an MTC device, and receiving a PA information transfer indication corresponding to the APN sent by an access network device after receiving a Radio Resource Control (RRC, Radio Resource Control) message (e.g., an RRC connection request message or an RRC connection complete message, etc.) carrying the PA information transfer indication corresponding to the APN from the MTC device; or, receiving a service request message carrying an APN from an MTC device, and receiving a PA information transfer indication corresponding to the APN sent by an access network device after receiving an RRC message carrying the PA information transfer indication corresponding to the APN from the MTC device; or receiving a bearer resource modification message carrying the APN from MTC equipment, and receiving a PA information transfer indication corresponding to the APN sent by access network equipment after receiving an RRC message carrying the PA information transfer indication corresponding to the APN from the MTC equipment; or receiving a PDN connection request message carrying an APN from the MTC device, and receiving a PA information transfer indication corresponding to the APN sent by the access network device after receiving an RRC message carrying the PA information transfer indication corresponding to the APN from the MTC device.

In an application scenario, the notifying, by the mobility management network element, the gateway device to create, for the MTC device, a PA bearer corresponding to the APN may specifically include: sending a session establishment request message to the gateway equipment to inform the gateway equipment to establish a PA (power amplifier) bearer corresponding to the APN for the MTC equipment, wherein the session establishment request message carries the APN and a PA characteristic activation indication; or sending a bearer modification command to the gateway device to notify the gateway device to create a PA bearer corresponding to the APN for the MTC device, wherein the bearer modification command carries default bearer identification information and a PA characteristic activation indication corresponding to the APN; or sending a bearer modification request message to the gateway device to notify the gateway device to create a PA bearer corresponding to the APN for the MTC device, wherein the bearer modification request carries default bearer identification information and a PA characteristic activation indication corresponding to the APN; or sending a bearer resource modification message to the gateway device to notify the gateway device to create a PA bearer corresponding to the APN for the MTC device, where the bearer resource modification message carries default bearer identification information and a PA characteristic activation indication corresponding to the APN. The gateway device can know that a certain APN subscribed by the MTC device activates the PA characteristic according to the information, and then create a PA bearer corresponding to the APN for the MTC device, wherein the gateway device can create 1 new bearer corresponding to the APN as the PA bearer corresponding to the APN of the MTC device, or modify the existing bearer corresponding to the APN, and use the modified bearer as the PA bearer corresponding to the APN of the MTC device, and modifying the existing bearer or creating the new bearer can be regarded as a way of creating the PA bearer corresponding to the APN for the MTC device.

For example, if a PA dedicated bearer needs to be created for transmitting PA information corresponding to a certain APN, the gateway device may initiate a bearer activation procedure to create a PA bearer corresponding to the APN for the MTC device; or the gateway device may also initiate a bearer modification procedure to modify an existing default bearer or other bearers corresponding to the APN, and use the modified default bearer or other bearers as a PA bearer corresponding to the APN created for the MTC device.

After the PA bearer corresponding to the APN is established, the MTC device can transmit PA information to the MTC server corresponding to the APN through the PA bearer.

It is understood that the Gateway device (GW) mentioned in this embodiment may be an SGW and a PGW in an SAE communication system, and the mobility management network element may be an MME, or the Gateway device may also be a GGSN in a WCDMA system, and the mobility management network element may be an SGSN, or similar network elements in other systems.

As can be seen from the above, in this embodiment, when knowing that the APN subscribed by the MTC device activates the PA feature for priority alarm, the mobility management network element notifies the gateway device to create a PA bearer corresponding to the APN for the MTC device, so that the MTC device can transmit PA information to the MTC server corresponding to the APN through the PA bearer. Based on the mechanism, the mobility management network element can create a PA bearer for the MTC equipment in advance or according to the indication of the MTC equipment, so that the MTC equipment can flexibly and effectively transmit PA information.

Example two

In order to better understand the technical solution of the embodiment of the present invention, the embodiment mainly takes the specific implementation in the SAE communication system as an example for description.

In this embodiment, if a certain APN subscribed by the MTC device activates the PA feature, the network side creates a bearer (may be called PA bearer) for the MTC device to transfer PA information corresponding to the APN in advance, and the MTC device may directly transfer the PA information through the PA bearer created in advance when the PA information needs to be transferred.

The following description is mainly made by way of example with respect to the following specific scenarios.

Scene one: network attachment flow creation PA bearer based on MTC (machine type communication) equipment

Referring to fig. 3, the specific steps may include:

301. the MTC equipment sends an attachment request message to the MME;

302. MME receives the attachment request message and acquires the subscription data of the MTC equipment from HSS;

303. the MME determines whether the APN subscribed by the MTC equipment activates the PA characteristic or not according to the subscription data of the MTC equipment;

for example, MTC devices subscribe to APN1, APN2, and APN3, wherein APN1 and APN3 activate the PA feature.

If determining that the APN (e.g., APN1 and APN3) activates the PA feature, the MME may notify the GW to create a PA bearer corresponding to the APN for the MTC device, and if determining that the APN does not activate the PA feature, the MME may not notify the GW to create the PA bearer corresponding to the APN for the MTC device.

304. The MME sends a setup session request message to the GW (SGW and PGW), where the setup session request message may carry an APN and a PA feature activation indication (PA feature activation indication is used to indicate whether the APN activates PA feature) to notify the GW whether to create PA bearers corresponding to the APN (e.g., APN1 and APN3) for the MTC device.

It can be understood that if the PA characteristic activation indication indicates that the APN activates the PA characteristic, it may indicate that the MME notifies the GW to create a PA bearer corresponding to the APN (e.g., APN1 and APN3) for the MTC device, and if the PA characteristic activation indication indicates that the APN does not activate the PA characteristic (or does not carry the PA characteristic activation indication in the setup session request message), it may indicate that the MME notifies the GW not to create a PA bearer corresponding to the APN (e.g., APN1 and APN3) for the MTC device. In this embodiment, the PA characteristic activation indication mainly focuses on that the APN activates the PA characteristic, and the MME notifies the GW of creating a PA bearer corresponding to the APN for the MTC device.

If the QoS for establishing the PA bearer is configured on the MME or subscription data from the HSS, the MME may further carry the QoS information for the PA bearer in the session establishment request message.

In practical applications, the QoS for establishing the PA bearer may be from subscription data on the HSS, or from a Policy and Charging Rules Function (PCRF) entity (if present), or may be configured on the MME or the PGW. In addition, the MME, PGW and PCRF can also modify the QoS.

305. The PGW establishes PA bearing for the MTC equipment;

if knowing that the APN5 activates the PA characteristic according to the PA characteristic activation indication, the way for the PGW to create the PA bearer for the MTC device may be one of the following:

a31. and the PA information is transferred through a default bearer, at this time, the PGW may only establish a default bearer corresponding to APN1 and APN3, and use the established default bearer as a PA bearer corresponding to APN1 and APN 3.

a32. And establishing a PA special bearer to transfer PA information. At this time, the PGW may establish a default bearer and a PA bearer for APN1 and APN3, respectively. The default bearer is established through a session request establishing process, and the PA dedicated bearer is established through a process of activating the dedicated bearer along with activating the default bearer.

a33. The PA bearer is established without establishing a default bearer. For example, APN1 is a default APN for subscription, and a PGW may establish a default bearer and a PA bearer corresponding to APN 1; the corresponding APN3 establishes only the PA bearer and not the default bearer. Alternatively, the PGW establishes PA bearers for APN1 and APN3, respectively, without establishing a default bearer.

In addition, if the PA feature activation indication indicates that the APN does not activate the PA feature, the PGW may establish a default bearer corresponding to the APN according to the PA feature activation indication without establishing a PA bearer corresponding to the APN.

306. The PGW sends a session establishment response message to the MME;

and the interactive message between the PGW and the MME is forwarded through the SGW.

In an application scenario, the PGW may further obtain, from the PCRF entity (if present), the QoS rule and other information corresponding to the PA bearer; the PCRF entity or the PGW may modify the QoS information carried by the PA.

307. The MME and the eNB establish corresponding S1 load bearing, and the eNB and the MTC equipment establish radio load bearing;

308. the MME sends an attachment acceptance message to the MTC equipment;

309. the MTC equipment sends an attachment completion message to the MME;

310. and when PA information corresponding to the APN needs to be transmitted, the MTC equipment transmits the PA information to an MTC server corresponding to the APN through PA bearing.

As can be seen from the above, in the scene one, the network side creates a PA bearer for transmitting a corresponding APN for the MTC device in advance based on the attach procedure of the MTC device, and the MTC device may directly transmit PA information through the PA bearer created in advance when the information of the PA is required to be transmitted.

Scene two: the PA feature is activated for the APN (e.g. APN2) that the MTC device has subscribed to, and the network side has previously established a scenario of bearer corresponding to this APN 2.

Referring to fig. 4, the specific steps include:

401. the HSS issues subscription data of the MTC equipment to the MME, wherein the subscription data comprises an indication that the APN2 subscribed by the MTC equipment activates the PA characteristic.

The HSS sends subscription data to the MME, informs the MME that the APN2 signed by the MTC equipment activates the PA characteristic, and the MME accordingly knows that the APN2 signed by the MTC equipment activates the PA characteristic.

402. If the MTC device is in an IDLE (RRC _ IDLE) state, the MME may perform a service request procedure after paging the MTC device, so that the MTC device is switched to a Connected (RRC _ Connected) state.

Of course, if the MTC device is already in RRC _ Connected state, step 402 may not be performed.

403. After receiving the subscription data from the HSS, the MME sends a bearer modification command to the GW;

the MME may determine that the APN2 subscribed by the MTC device activates the PA feature according to the received subscription data from the HSS, send a bearer modification command to the GW, and notify the GW of creating a PA bearer corresponding to the APN2 for the MTC device.

In an application scenario, the bearer modification command sent by the MME may carry parameters such as a default bearer identifier corresponding to the APN2 (the default bearer identifier may correspond to the APN2), a PA characteristic activation indication (here, the PA characteristic activation indication indicates that the APN2 activates the PA characteristic), and the gateway device may learn from this that a PA bearer corresponding to the APN2 needs to be created for the MTC device.

If the QoS for establishing the PA bearer is configured on the MME or subscription data from the HSS, the MME may further carry the QoS information of the PA bearer in the bearer modification command.

In practical application, the QoS for establishing the PA bearer may be from subscription data on the HSS, may be configured on the MME or the PGW, or may be from the PCRF. In addition, the MME, PGW, PCRF may modify the QoS.

404. The PGW initiates a bearer modification or bearer establishment procedure, and creates a PA bearer corresponding to APN2 for the MTC device.

In practical application, if 1 PA dedicated bearer needs to be newly established for transferring PA information corresponding to APN2, the PGW initiates a bearer activation procedure to newly establish a PA bearer corresponding to APN2 for the MTC device; alternatively, the PGW may also initiate a bearer modification procedure, modify an existing default bearer or other bearers of the corresponding APN2, and use it as a PA bearer of the corresponding APN2 created for the MTC device.

It can be understood that, whether a bearer corresponding to 1 APN2 is newly established to serve as a PA bearer of an APN2 corresponding to an MTC device, or an existing bearer corresponding to an APN2 is modified to serve as a PA bearer of an APN2 corresponding to the MTC device, it can be regarded as a way of creating a PA bearer corresponding to an APN2 for the MTC device.

405. When the PA information corresponding to the APN2 needs to be transferred, the MTC device transfers the PA information to the MTC server corresponding to the APN2 through the PA bearer corresponding to the APN 2.

As can be seen from the above, in the scenario two, the network side creates a PA bearer for transmitting a corresponding APN for the MTC device in advance based on a bearer modification or bearer establishment procedure, and the MTC device may directly transmit the PA information through the PA bearer created in advance when the MTC device has PA information to transmit.

Scene three: the MTC device newly subscribes to an APN (e.g., APN4) with PA characteristics.

Referring to fig. 5, the method may specifically include:

501. and the HSS issues subscription data of the MTC equipment to the MME, wherein the subscription data comprises an indication that the APN4 newly subscribed by the MTC equipment activates the PA characteristic.

The HSS informs the MME that the APN4 newly signed by the MTC equipment activates the PA characteristic by issuing the subscription data to the MME, and the MME learns that the APN4 newly signed by the MTC equipment activates the PA characteristic.

If the APN4 activates the PA feature, the MME may notify the GW to create a PA bearer corresponding to the APN4 for the MTC device, and if the APN4 does not activate the PA feature, the GW may not notify the MTC device to create a PA bearer corresponding to the APN 4.

502. If the MTC device is in the RRC _ IDLE state, the MME can perform a service request process after paging the MTC device, so that the MTC device is switched to the RRC _ Connected state.

Of course, if the MTC device is already in RRC _ Connected state, step 502 may not be performed.

503. After receiving the subscription data of the MTC equipment from the HSS, the MME sends a session establishment request message to GW (SGW and PGW);

the MME can determine that PA characteristic is activated by APN4 newly signed by the MTC equipment according to received subscription data from the HSS, send a session establishment request message to the GW, and inform the GW to establish a PA bearer corresponding to APN4 for the MTC equipment.

In an application scenario, the session establishment request sent by the MME may carry parameters such as an APN4 identifier, a PA characteristic activation indication (where the PA characteristic activation indication indicates that the APN4 activates the PA characteristic), and the like, and accordingly, the gateway device may know whether a PA bearer corresponding to the APN4 needs to be created for the MTC device.

It can be understood that, if the PA characteristic activation indication indicates that the APN4 activates the PA characteristic, it may indicate that the MME notifies the GW to create a PA bearer corresponding to the APN4 for the MTC device, and if the PA characteristic activation indication indicates that the APN4 does not activate the PA characteristic (or the PA characteristic activation indication is not carried in the session establishment request message), it may indicate that the MME notifies the GW not to create a PA bearer corresponding to the APN4 for the MTC device. In this embodiment, the PA characteristic activation indication mainly focuses on that the APN4 activates the PA characteristic, and the MME is a scenario that notifies the GW to create a PA bearer corresponding to the APN4 for the MTC device.

504. The PGW establishes PA bearing for the MTC equipment;

if knowing that the APN5 activates the PA characteristic according to the PA characteristic activation indication, the way for the PGW to create the PA bearer for the APN4 newly subscribed by the MTC device may be one of the following:

a51. the PA information is transferred through a default bearer, at this time, the PGW may only establish a default bearer corresponding to the newly subscribed APN4, and use the established default bearer as the PA bearer corresponding to the newly subscribed APN 4.

a52. The PA dedicated bearer is established to transfer PA information, and at this time, the PGW may establish a default bearer and a PA bearer corresponding to APN 4. The default bearer of APN4 is established through a session establishment request procedure, and the PA dedicated bearer is established through a procedure of dedicated bearer activation accompanied by default bearer activation.

a53. The PA bearer is established without establishing a default bearer. At this time, the PGW may establish a PA bearer corresponding to APN4 without establishing a default bearer.

505. GW sends a response for establishing session to MME;

506. The MME and the eNB establish corresponding S1 load bearing, and the eNB and the MTC equipment establish radio load bearing;

507. when the PA information corresponding to the APN4 needs to be transferred, the MTC device transfers the PA information to the MTC server corresponding to the APN4 through PA bearing.

In the third scenario, the network side creates a PA bearer for transmitting a corresponding APN for the MTC device in advance based on the session establishment procedure, and the MTC device may directly transmit the PA information through the PA bearer created in advance when the PA information needs to be transmitted.

It is understood that the embodiment is described in the SAE system as an example, and of course, the embodiment can also be applied to other communication systems by replacing corresponding network elements, and so on, and the detailed description is not described here.

As can be seen from the above, in this embodiment, when knowing that the APN subscribed by the MTC device activates the PA feature, the mobility management network element notifies the gateway device to create a PA bearer corresponding to the APN for the MTC device, so that the MTC device can transmit PA information to the MTC server corresponding to the APN through the PA bearer. Based on the mechanism, the mobility management network element can create PA bearing in advance for MTC equipment, so that the MTC equipment can flexibly and effectively transmit PA information.

EXAMPLE III

The present embodiment is described with reference to a specific embodiment in an SAE communication system.

In this embodiment, if the MTC device indicates to the network when PA information needs to be transmitted, the network side establishes a corresponding PA bearer for the MTC device to transmit the PA information.

Scene four: when the MTC device is not attached to the network, there is PA information to be transferred.

Referring to fig. 6, the method may specifically include:

601. the MTC equipment sends an attachment request message to the MME;

in an application scenario, the attach request sent by the MTC device may carry parameters such as an APN (e.g., APN5) and a PA information transfer indication, where the PA information transfer indication may indicate to the network that the MTC device has PA information corresponding to the APN5 and needs to transfer the PA information.

It is understood that the MTC device may also send the PA information delivery indication of the corresponding APN5 to the eNB through an RRC message (e.g., an RRC connection request or an RRC connection complete message, etc.), and the eNB delivers the PA information delivery indication of the corresponding APN5 to the MME.

In practical applications, the PA information delivery indication may use an extension of the meaning of the parameter indication in an existing message or an existing parameter bit, or add a new parameter as the PA information delivery indication, so as to indicate to the network that the MTC device has PA information to be delivered.

602. The HSS issues subscription data of the MTC equipment to the MME, wherein the subscription data contains an indication that the APN5 signed by the MTC equipment activates PA characteristics;

603. the MME determines whether the APN5 signed by the MTC equipment activates the PA characteristic according to the subscription data of the MTC equipment;

if determining that the APN5 activates the PA feature, the MME may notify the GW to create a PA bearer corresponding to the APN5 for the MTC device, and if determining that the APN5 does not activate the PA feature, may not notify the GW to create a PA bearer corresponding to the APN5 for the MTC device.

604. The MME sends a setup session request message to the GW, which may carry a PA feature activation indication (where the PA feature activation indication indicates that APN5 activates the PA feature), informing the GW to create a PA bearer for the MTC device corresponding to APN 5.

It can be understood that, if the PA characteristic activation indication indicates that the APN5 activates the PA characteristic, it may indicate that the MME notifies the GW to create a PA bearer corresponding to the APN5 for the MTC device, and if the PA characteristic activation indication indicates that the APN5 does not activate the PA characteristic (or the PA characteristic activation indication is not carried in the session establishment request message), it may indicate that the MME notifies the GW not to create a PA bearer corresponding to the APN5 for the MTC device. In this embodiment, the PA characteristic activation indication mainly focuses on that the APN5 activates the PA characteristic, and the MME is a scenario that notifies the GW to create a PA bearer corresponding to the APN5 for the MTC device.

605. The PGW establishes PA bearing for the MTC equipment;

a61. and transmitting the PA information through a default bearer, wherein at this time, the PGW can only establish a default bearer corresponding to the APN4, and the established default bearer is used as the PA bearer corresponding to the APN 5.

a62. And establishing a PA special bearer to transfer PA information. At this point, the PGW may establish a default bearer and a PA bearer for APN 5. The default bearer is established through a session establishment request flow, and the PA bearer is established through a PGW activated through a dedicated bearer along with the default bearer activation flow.

a63. The PA bearer is established without establishing a default bearer. At this time, the PGW may establish only a PA bearer and not a default bearer for APN 5.

606. GW sends a response for establishing session to MME;

607. The MME and the eNB establish corresponding S1 load bearing, and the eNB and the MTC equipment establish radio load bearing;

608. the MME sends an attachment acceptance message to the MTC equipment;

609. the MTC equipment sends an attachment completion message to the MME;

610. and the MTC equipment transmits PA information to an MTC server corresponding to the APN5 through PA bearing.

In practical applications, when the transfer of the PA information corresponding to APN5 is completed, the PA bearer corresponding to APN5 may be released or reserved.

It can be understood that the above scheme may also be used in scenarios where the service is limited, such as roaming disallowance, location area disallowance, or access time disallowance, and after PA information transmission is completed, the MTC device may actively initiate detach or the network displays or implicitly detach the MTC device.

As can be seen from the above, in the scene four, when the network side learns that the MTC device has PA information corresponding to a certain APN to be transferred, a PA bearer corresponding to the APN for transfer is created for the MTC device based on an attach procedure of the MTC device, and the MTC device is transferred through the PA bearer.

Scene five: when the MTC device has attached to the network and transits to the RRC _ IDLE state, PA information needs to be transferred, and the network already has a bearer corresponding to the APN (e.g., APN6) for which PA information needs to be transferred.

The following two methods can be selected in this scenario:

the first method, see fig. 7, is implemented by modifying a service request flow by the MTC device.

701. The MTC equipment sends a service request message to the MME;

in an application scenario, the service request message sent by the MTC device may carry parameters such as default bearer identifier information (default bearer identifier may correspondingly indicate APN6) of the APN6 or APN6, and PA information transfer indication, where the PA information transfer indication may indicate to the network that there is PA information to be transferred corresponding to the APN 6.

It is to be understood that the MTC device may also send a PA information delivery indication to the eNB through an RRC message (e.g., an RRC connection request or an RRC connection complete message, etc.), and the eNB delivers the PA information delivery indication to the MME.

702. And the MME determines whether the APN6 subscribed by the MTC equipment activates the PA characteristic according to the subscription data of the MTC equipment.

The MME may have previously obtained the subscription data of the MTC device, for example, the MME may obtain the subscription data of the MTC device from the HSS during the network attach procedure of the MTC device.

703. The MME sends a modification bearer request message to the GW, wherein the modification bearer request message can carry default bearer identification information of the APN6 and a PA characteristic activation indication (the PA characteristic activation indication indicates that the APN6 activates the PA characteristic), and informs the GW to create a PA bearer corresponding to the APN6 for the MTC equipment;

704. GW sends a response message of load modification request to MME;

705. The PGW initiates a bearer modification or bearer establishment procedure, and creates a PA bearer corresponding to APN6 for the MTC device.

In practical application, if 1 PA dedicated bearer needs to be newly established for transferring PA information corresponding to APN6, the PGW may initiate a bearer activation procedure to newly establish a PA bearer corresponding to APN6 for the MTC device; or, the PGW may also initiate a bearer modification procedure, modify an existing default bearer or other bearers of the corresponding APN6, and use it as a PA bearer of the corresponding APN6 created for the MTC device.

It can be understood that, whether a bearer corresponding to 1 APN6 is newly established to serve as a PA bearer of an APN6 corresponding to an MTC device, or an existing bearer corresponding to an APN6 is modified to serve as a PA bearer of an APN6 corresponding to the MTC device, it can be regarded as a way of creating a PA bearer corresponding to an APN6 for the MTC device.

706. And the MTC equipment transmits PA information to the MTC server corresponding to the APN6 through the PA bearer corresponding to the APN 6.

In practical applications, when the transfer of the PA information corresponding to APN6 is completed, the PA bearer corresponding to APN6 may be released or reserved.

The second method comprises the following steps: referring to fig. 8, MTC devices are implemented by requesting bearer resource modification.

801. The MTC device moves to RRC _ Connected state.

If the MTC device is in an IDLE (RRC _ IDLE) state, the MTC device may then perform a service request procedure to transition to a Connected (RRC _ Connected) state.

Of course, if the MTC device is already in RRC _ Connected state, step 801 may not be performed.

802. The MTC equipment sends a message for requesting modification of bearer resources to the MME;

in an application scenario, the request bearer resource modification message sent by the MTC device may carry parameters such as default bearer identifier information (default bearer identifier may correspondingly indicate APN6) of APN6 or APN6, and PA information transfer indication, which may indicate to the network that there is PA information to be transferred corresponding to the APN 6.

803. And the MME determines whether the APN6 subscribed by the MTC equipment activates the PA characteristic according to the subscription data of the MTC equipment.

If determining that the APN6 activates the PA feature, the MME may notify the GW to create a PA bearer corresponding to the APN6 for the MTC device, and if determining that the APN6 does not activate the PA feature, may not notify the GW to create a PA bearer corresponding to the APN6 for the MTC device.

804. The MME sends a request bearer resource modification message to the GW, wherein the request bearer resource modification message can carry default bearer identification information of an APN6 and a PA characteristic activation indication (the PA characteristic activation indication indicates that an APN6 activates PA characteristics), and informs the GW to create a PA bearer corresponding to the APN6 for the MTC device;

805. The PGW initiates a bearer modification or bearer establishment procedure, and creates a PA bearer corresponding to APN6 for the MTC device.

806. And the MTC equipment transmits PA information to the MTC server corresponding to the APN6 through the PA bearer corresponding to the APN 6.

As can be seen from the above, in scene five, when knowing that the MTC device has PA information corresponding to a certain APN to be transferred, the network side creates a PA bearer corresponding to the APN for the MTC device based on a bearer modification or bearer establishment procedure, and the MTC device transfers the PA information through the PA bearer.

Scene six: the MTC device is already attached to the network, and corresponds to an APN (e.g. APN7) that needs to transfer PA information, and no bearer exists on the network side.

Referring to fig. 9, the method may specifically include:

901. the MTC device moves to RRC _ Connected state.

Of course, if the MTC device is already in RRC _ Connected state, step 901 may not be performed.

902. The MTC device sends a PDN connection request message to the MME,

in an application scenario, the PDN connection request message sent by the MTC device may carry parameters such as an APN7 and a PA information transfer indication, where the PA information transfer indication may indicate to a network that PA information needs to be transferred corresponding to the APN 7.

903. And the MME determines whether the APN subscribed by the MTC equipment activates the PA characteristic or not according to the subscription data of the MTC equipment.

If determining that the APN7 activates the PA feature, the MME may notify the GW to create a PA bearer corresponding to the APN7 for the MTC device, and if determining that the APN7 does not activate the PA feature, may not notify the GW to create a PA bearer corresponding to the APN7 for the MTC device.

904. The MME sends a session establishment request message to the GW, wherein the session establishment request message can carry the APN7 and a PA characteristic activation indication indicating whether the APN7 activates the PA characteristic, and informs the GW to establish a PA bearer corresponding to the APN7 for the MTC equipment;

if the QoS for establishing the PA bearer is configured on the MME or subscription data from the HSS, the MME may also carry the QoS information for the PA bearer in the session establishment request.

905. PGW creates PA bearer corresponding to APN7 for MTC device

a91. the PA information is transferred through a default bearer, at this time, the PGW may only establish a default bearer corresponding to APN7, and use the established default bearer as the PA bearer corresponding to APN 7.

a92. The PA dedicated bearer is established to transfer PA information, and at this time, the PGW may establish a default bearer and a PA bearer corresponding to APN 7. The default bearer is established through a session request establishing process, and the PA dedicated bearer is established through a process of activating the dedicated bearer along with activating the default bearer.

a93. The PA bearer is established without establishing a default bearer. At this time, the PGW may establish a PA bearer corresponding to APN7 without establishing a default bearer.

906. The PGW sends a session establishment response message to the MME;

907. The MME and the eNB establish corresponding S1 load bearing, and the eNB and the MTC equipment establish radio load bearing;

908. and the MME sends a PDN connection completion message to the MTC equipment.

909. And the MTC equipment transmits PA information to an MTC server corresponding to the APN7 through PA bearing.

In a sixth scenario, when knowing that the MTC device has PA information corresponding to a certain APN to be transferred, the network side creates a PA bearer corresponding to the APN for the MTC device based on the PDN connection establishment procedure, and the MTC device transfers the PA bearer.

As can be seen from the above, in this embodiment, when knowing that the APN subscribed by the MTC device activates the PA feature and that the MTC device needs to transmit PA information corresponding to the APN, the mobility management network element notifies the gateway device to create a PA bearer corresponding to the APN for the MTC device, and the MTC device can immediately transmit the PA information to the MTC server corresponding to the APN through the PA bearer. Based on the mechanism, the mobility management network element can create PA (power amplifier) load for the MTC equipment according to the indication of the MTC equipment, so that the MTC equipment can flexibly and effectively transmit PA information.

It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In order to better implement the technical scheme of the embodiment of the invention, the embodiment of the invention also provides related equipment for implementing the technical scheme.

Referring to fig. 10, a mobility management network element 1000 according to an embodiment of the present invention may include:

an obtaining module 1010, configured to obtain subscription data of a machine type communication MTC device;

a determining and notifying module 1020, configured to notify a gateway device to create a PA bearer corresponding to an access point name APN subscribed by the MTC device for the MTC device if it is determined that the PA feature is activated by the APN according to subscription data of the MTC device, so that the MTC device transmits PA information to an MTC server corresponding to the APN through the PA bearer.

In an application scenario, the mobility management network element 1000 may further include:

a receiving module 1030, configured to receive a PA information transfer indication and the APN sent by the MTC device before the determination notification module notifies the gateway device to create a PA bearer corresponding to the APN for the MTC device.

In one application scenario, the receiving module 1030 may include one or more of the following receiving sub-modules:

a first receiving sub-module, configured to receive an attach request message from the MTC device, where the attach request message carries the APN and PA information transfer indication;

a second receiving sub-module, configured to receive a service request message from the MTC device, where the service request message carries the APN and PA information transfer indication;

a third receiving sub-module, configured to receive a bearer resource modification message from the MTC device, where the bearer resource modification message carries the APN and PA information transfer indication;

and a fourth receiving sub-module, configured to receive a PDN connection request message from the MTC device, where the PDN connection request message carries the APN and PA information transfer indication.

In another application scenario, the receiving module 1030 may also include one or more of the following receiving sub-modules:

a fifth receiving sub-module, configured to receive an attach request message carrying the APN from the MTC device, and receive a PA information transfer indication corresponding to the APN sent by an access network device after receiving a radio resource control RRC message carrying the PA information transfer indication corresponding to the APN from the MTC device;

a sixth receiving sub-module, configured to receive a service request message carrying the APN from the MTC device, and receive a PA information transfer indication corresponding to the APN sent by an access network device after receiving an RRC message carrying the PA information transfer indication corresponding to the APN from the MTC device;

a seventh receiving sub-module, configured to receive a bearer resource modification message carrying the APN from the MTC device, and receive a PA information transfer indication corresponding to the APN sent by an access network device after receiving an RRC message carrying the PA information transfer indication corresponding to the APN from the MTC device;

an eighth receiving sub-module, configured to receive a PDN connection request message carrying the APN from the MTC device, and receive a PA information transfer indication corresponding to the APN sent by an access network device after receiving an RRC message carrying the PA information transfer indication corresponding to the APN from the MTC device.

In one application scenario, determining the notification module may include one or more of the following sub-modules:

a first notification sub-module, configured to send a session establishment request message to a gateway device when determining that an APN subscribed by an MTC device activates a PA characteristic according to subscription data of the MTC device acquired by the acquisition module 1010, so as to notify the gateway device to create a PA bearer corresponding to the APN for the MTC device, where the session establishment request message carries an APN and a PA characteristic activation indication;

a second notification sub-module, configured to send a modify bearer command to the gateway device when determining, according to the subscription data of the MTC device acquired by the acquisition module 1010, that the APN subscribed by the MTC device activates the PA characteristic, so as to notify the gateway device to create a PA bearer corresponding to the APN for the MTC device, where the modify bearer command carries default bearer identification information and a PA characteristic activation instruction corresponding to the APN;

a third notification sub-module, configured to send a modify bearer request message to the gateway device when determining, according to the subscription data of the MTC device acquired by the acquisition module 1010, that the APN subscribed by the MTC device activates the PA characteristic, so as to notify the gateway device to create a PA bearer corresponding to the APN for the MTC device, where the modify bearer request carries default bearer identification information and a PA characteristic activation indication corresponding to the APN;

a fourth notification sub-module, configured to send a bearer resource modification message to the gateway device when determining that the PA characteristic is activated by the APN subscribed by the MTC device according to the subscription data of the MTC device acquired by the acquisition module 1010, so as to notify the gateway device to create a PA bearer corresponding to the APN for the MTC device, where the bearer resource modification message carries default bearer identification information and a PA characteristic activation indication corresponding to the APN.

It can be understood that the functions of each functional module of the mobility management network element 1000 may be specifically implemented according to the method in the foregoing method embodiment, and the specific implementation process may refer to the relevant description of the foregoing method embodiment, which is not described herein again.

As can be seen from the above, in this embodiment, when knowing that the APN subscribed by the MTC device activates the PA feature for priority alarm, the mobility management network element 1000 notifies the gateway device to create a PA bearer corresponding to the APN for the MTC device, so that the MTC device can transmit PA information to the MTC server corresponding to the APN through the PA bearer. Based on the mechanism, the mobility management network element 1000 may create a PA bearer for the MTC device in advance or according to the indication of the MTC device, thereby facilitating the MTC device to flexibly and effectively transmit PA information.

An embodiment of the present invention further provides a communication system, including: the mobility management network element 1000.

Referring to fig. 11, an embodiment of the present invention further provides a communication system, including: a mobility management network element 1110 and a gateway device 1120.

The mobility management network element 1110 is configured to acquire subscription data of the MTC device; if determining that the APN subscribed by the MTC device activates PA characteristics according to the subscription data of the MTC device, notifying the gateway device 1120 to create a PA bearer corresponding to the APN for the MTC device;

the gateway device 1120, according to the notification of the mobility management network element 1110, creates a PA bearer corresponding to the APN for the MTC device, so that the MTC device transmits PA information to the MTC server corresponding to the APN through the PA bearer.

It can be understood that the functions of each entity in the communication system of this embodiment may be specifically implemented according to the method in the foregoing method embodiment, and the specific implementation process may refer to the relevant description of the foregoing method embodiment, which is not described herein again.

In summary, in the embodiment of the present invention, when knowing that the APN subscribed by the MTC device activates the PA feature for priority alarm, the mobility management network element notifies the gateway device to create a PA bearer corresponding to the APN for the MTC device, so that the MTC device can transmit PA information to the MTC server corresponding to the APN through the PA bearer. Based on the mechanism, the mobility management network element can create a PA bearer for the MTC equipment in advance or according to the indication of the MTC equipment, so that the MTC equipment can flexibly and effectively transmit PA information.

Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable storage medium, and the storage medium may include: read-only memory, random access memory, magnetic or optical disk, and the like.

The method, the device and the system for transmitting priority alarm information provided by the embodiment of the invention are described in detail, a specific example is applied in the text to explain the principle and the implementation of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. A method of communicating priority alarm information, comprising:

2. The method of claim 1, wherein the notifying the gateway device creates a PA bearer for the MTC device corresponding to the APN, and further comprising:

and receiving a PA information transfer indication and the APN sent by the MTC equipment.

3. The method according to claim 2, wherein the receiving the APN and the PA information transfer indication sent by the MTC device comprises:

receiving an attach request message from the MTC device, wherein the attach request message carries the APN and a PA information transfer indication; or,

receiving a service request message from the MTC device, wherein the service request message carries the APN and PA information transfer indication; or,

receiving a bearer resource modification message from the MTC device, wherein the bearer resource modification message carries the APN and PA information transfer indication; or,

and receiving a Packet Data Network (PDN) connection request message from the MTC equipment, wherein the PDN connection request message carries the APN and PA information transfer indication.

4. The method according to claim 2, wherein the receiving the APN and the PA information transfer indication sent by the MTC device comprises:

receiving an attach request message carrying the APN from the MTC device, and receiving a PA information transfer indication corresponding to the APN sent by an access network device after receiving a Radio Resource Control (RRC) message carrying the PA information transfer indication corresponding to the APN from the MTC device;

or,

receiving a service request message carrying the APN from the MTC device, and receiving a PA information transfer indication corresponding to the APN sent by an access network device after receiving an RRC message carrying the PA information transfer indication corresponding to the APN from the MTC device;

or,

receiving a bearer resource modification message carrying the APN from the MTC device, and receiving a PA information transfer indication corresponding to the APN sent by an access network device after receiving an RRC message carrying the PA information transfer indication corresponding to the APN from the MTC device;

or,

receiving a PDN connection request message carrying the APN from the MTC equipment, and receiving a PA information transfer instruction corresponding to the APN sent by the access network equipment after receiving an RRC message carrying the PA information transfer instruction corresponding to the APN from the MTC equipment.

5. The method of claim 1, wherein the notifying the gateway device to create a PA bearer for the MTC device corresponding to the APN comprises:

sending a session establishment request message to a gateway device to inform the gateway device of establishing a PA bearer corresponding to the APN for the MTC device, wherein the session establishment request message carries the APN and a PA characteristic activation indication; or,

sending a bearer modification command to gateway equipment to inform the gateway equipment of creating a PA bearer corresponding to the APN for the MTC equipment, wherein the bearer modification command carries default bearer identification information and a PA characteristic activation indication corresponding to the APN; or,

sending a modification bearer request message to a gateway device to notify the gateway device to create a PA bearer corresponding to the APN for the MTC device, wherein the modification bearer request carries default bearer identification information and a PA characteristic activation indication corresponding to the APN; or,

and sending a bearer resource modification message to the gateway device to notify the gateway device to create a PA bearer corresponding to the APN for the MTC device, wherein the bearer resource modification message carries default bearer identification information and a PA characteristic activation indication corresponding to the APN.

6. A mobility management network element, comprising:

a determining and notifying module, configured to notify a gateway device to create a PA bearer corresponding to an access point name APN for the MTC device if it is determined, according to the subscription data of the MTC device, that the APN of the access point name APN subscribed by the MTC device activates a PA feature for priority alarm, so that the MTC device transmits PA information to an MTC server corresponding to the APN through the PA bearer.

7. The mobility management network element of claim 6,

the mobility management network element further comprises:

a receiving module, configured to receive a PA information transfer indication and the APN sent by the MTC device before the determination notification module notifies a gateway device to create a PA bearer corresponding to the APN for the MTC device.

8. The mobility management network element of claim 7,

the receiving module comprises one or more of the following receiving sub-modules:

a second receiving submodule, configured to receive a service request message from the MTC device, where the service request message carries the APN and PA information transfer indication;

a fourth receiving sub-module, configured to receive a PDN connection request message from the MTC device, where the PDN connection request message carries the APN and PA information transfer indication.

9. The mobility management network element of claim 6,

determining that the notification module includes one or more of the following sub-modules:

a first notification sub-module, configured to send a session establishment request message to a gateway device when determining that an APN subscribed by the MTC device activates a PA characteristic according to subscription data of the MTC device acquired by the acquisition module, so as to notify the gateway device to create a PA bearer corresponding to the APN for the MTC device, where the session establishment request message carries the APN and a PA characteristic activation indication;

a second notification sub-module, configured to send a modify bearer command to a gateway device when determining, according to subscription data of the MTC device acquired by the acquisition module, that the APN subscribed by the MTC device activates a PA characteristic, so as to notify the gateway device to create a PA bearer corresponding to the APN for the MTC device, where the modify bearer command carries default bearer identification information and a PA characteristic activation indication corresponding to the APN;

a third notification sub-module, configured to send a modify bearer request message to a gateway device when determining, according to subscription data of the MTC device acquired by the acquisition module, that the APN subscribed by the MTC device activates a PA characteristic, so as to notify the gateway device to create a PA bearer corresponding to the APN for the MTC device, where the modify bearer request carries default bearer identification information and a PA characteristic activation indication corresponding to the APN;

and the fourth notification sub-module is configured to send a bearer resource modification message to the gateway device when it is determined that the PA characteristic is activated by the APN subscribed by the MTC device according to the subscription data of the MTC device acquired by the acquisition module, so as to notify the gateway device to create a PA bearer corresponding to the APN for the MTC device, where the bearer resource modification message carries default bearer identification information and a PA characteristic activation indication corresponding to the APN.

10. A communication system, comprising:

the mobility management network element is used for acquiring subscription data of the Machine Type Communication (MTC) equipment; if the Access Point Name (APN) signed by the MTC equipment is determined to activate the Priority Alarm (PA) characteristic according to the subscription data of the MTC equipment, notifying gateway equipment to establish a PA bearer corresponding to the APN for the MTC equipment;