CN110719607B

CN110719607B - Network congestion indication method, device and equipment

Info

Publication number: CN110719607B
Application number: CN201810766343.7A
Authority: CN
Inventors: 王文
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2018-07-12
Filing date: 2018-07-12
Publication date: 2021-03-16
Anticipated expiration: 2038-07-12
Also published as: CN110719607A

Abstract

The embodiment of the invention provides a method, a device and equipment for indicating network congestion, wherein the method for indicating the network congestion comprises the following steps: the method comprises the steps that network side equipment receives a mobile registration updating request sent by User Equipment (UE) in a connection state; the network side equipment generates a registration acceptance message, wherein the registration acceptance message carries an information element of a mobile backoff timer under the condition that the network is under congestion control of a non-access stratum (NAS) level; and the network side equipment sends the registration acceptance message to the UE, so that the UE determines the congestion state of the network side according to whether the registration acceptance message carries the information element of the mobile backoff timer. In this embodiment, when the network is in non-access stratum NAS level congestion control, the registration acceptance message carrying the information element of the mobile backoff timer is sent to the UE, so that the UE determines the congestion status of the current network, and avoids the UE from subsequently initiating an unnecessary NAS request message.

Description

Network congestion indication method, device and equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a device for indicating network congestion.

Background

With the development of communication network technology, in order to ensure that network functional entities in a 5G system can normally operate when providing connection and necessary service for User Equipment (UE), the 5G system supports load (re) balancing, overload control, and Non-access stratum (NAS) level congestion control under various operating conditions.

The NAS level congestion control is applicable to all NAS signaling, and when the network is in the NAS level congestion control, the UE should not initiate any NAS signaling.

However, in the network connection state, for the UE-initiated mobile registration update request, the AMF does not send a reject message, but sends a registration accept message to the UE. After receiving the registration acceptance message, the UE may be rejected by subsequently initiating the NAS request message, thereby causing waste of air interface resources and unnecessary signaling overhead.

Disclosure of Invention

The technical problem to be solved by the embodiments of the present invention is to provide a network congestion indication method, so as to solve the problems of waste of air interface resources and unnecessary signaling overhead caused by rejection of an NAS request message initiated by a UE in the prior art.

Correspondingly, the embodiment of the invention also provides a network congestion indicating device and equipment, which are used for ensuring the realization and the application of the method.

In order to solve the problems, the invention is realized by the following technical scheme:

a first aspect provides a method of network congestion indication, the method comprising:

the method comprises the steps that network side equipment receives a mobile registration updating request sent by User Equipment (UE) in a connection state;

the network side equipment generates a registration acceptance message, wherein the registration acceptance message carries an information element of a mobile backoff timer under the condition that the network is under congestion control of a non-access stratum (NAS) level;

and the network side equipment sends the registration acceptance message to the UE, so that the UE determines the congestion state of the network side according to whether the registration acceptance message carries the information element of the mobile backoff timer.

A second aspect provides a method of network congestion indication, the method comprising:

the UE in a connected state sends a mobile registration updating request to the equipment on the side of the access network;

the UE receives a registration acceptance message sent by the network side equipment;

and the UE determines the congestion state of the network side according to whether the registration acceptance message carries the information element of the mobile backoff timer.

A third aspect provides a network congestion indicating apparatus, applied to a network side device, the apparatus including:

a receiving module, configured to receive a mobile registration update request sent by a UE in a connected state;

a generating module, configured to generate a registration acceptance message, where the registration acceptance message carries an information element of a mobile backoff timer when a network is in non-access stratum NAS level congestion control;

a sending module, configured to send the registration acceptance message to the UE, so that the UE determines a congestion state of a network side according to whether the registration acceptance message carries an information element of a mobile backoff timer.

A fourth aspect provides a network congestion indicating apparatus, applied to a UE, the apparatus including:

a first sending module, configured to send a mobile registration update request to an access network side device when the UE is in a connected state;

a receiving module, configured to receive a registration acceptance message sent by the network side device;

and the determining module is used for determining the congestion state of the network side according to whether the registration receiving message carries the information element of the mobile backoff timer.

A fifth aspect provides a user equipment comprising: memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the network congestion indication method as described.

A sixth aspect provides a network device, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the network congestion indication method as described.

A seventh aspect provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps in a method of network congestion indication as described, or implements the steps in a method of network congestion indication as described.

Compared with the prior art, the embodiment of the invention has the following advantages:

in the embodiment of the invention, network side equipment receives a mobile registration update request sent by UE in a connection state, generates a corresponding registration acceptance message, and carries an information element of a mobile backoff timer in the registration acceptance message sent to the UE under the condition that the network is in NAS level congestion control, so that the UE determines the congestion state of the network side according to whether the registration acceptance message carries the information element of the mobile backoff timer, and the UE is prevented from subsequently initiating an unnecessary non-access stratum request message. The embodiment not only reduces the signaling overhead, but also improves the utilization rate of the air interface resources.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

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

Fig. 1 is a flowchart of a network congestion indication method according to an embodiment of the present invention;

fig. 2 is another flowchart of a network congestion indication method according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a network congestion indicating apparatus according to an embodiment of the present invention;

fig. 4 is another schematic structural diagram of a network congestion indicating apparatus according to an embodiment of the present invention;

fig. 5 is another schematic structural diagram of a network congestion indicating apparatus according to an embodiment of the present invention;

fig. 6 is another schematic structural diagram of a network congestion indicating apparatus according to an embodiment of the present invention;

FIG. 7 is a flowchart of a first example application provided by an embodiment of the present invention;

FIG. 8 is a flowchart of a second example application provided by an embodiment of the present invention;

FIG. 9 is a flowchart of a third example application provided by an embodiment of the present invention;

fig. 10 is a flowchart of a fourth application example provided in the embodiment of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

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 some, not all, embodiments of the present invention. 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.

Fig. 1 is a flowchart of a network congestion indicating method according to an embodiment of the present invention; the method is applied to a 5G system, and specifically comprises the following steps:

step 101: the method comprises the steps that network side equipment receives a mobile registration updating request sent by User Equipment (UE) in a connection state;

in this embodiment, if the Network is in the NAS level congestion state and the UE is in the connected state, the UE may send a Mobile Registration Update Request (MRUR) to a Network side device (e.g., AMF) through a Radio Access Network (RAN), that is, the Network side device receives the mobile registration update request sent by the UE under the NAS level Network congestion control.

It should be noted that, in this embodiment, the parameters included in the mobile registration update request are well known to those skilled in the art, and are not described herein again.

Step 102: the network side equipment generates a registration acceptance message, wherein the registration acceptance message carries an information element of a mobile backoff timer under the condition that the network is under congestion control of a non-access stratum (NAS) level;

in this step, after receiving a mobile registration update request sent by the UE, the network side device generates a corresponding registration accept message, and adds an Information Element (IE, Information Element) of a mobile backoff timer (i.e., T3346) to the registration accept message when the network is in NAS level congestion control, where one addition method is: the IEI (Information Element Identifier) of the Information Element of the mobile backoff timer is 5F, the format is TLV, and the length is 3 bits.

It should be noted that, the network side device adds an information element of the mobile backoff timer according to a backoff algorithm, and is used to instruct the UE that receives the registration accept message including the information element to backoff for a period of time to retransmit data.

The information element of the mobile backoff timer is added to the REGISTRATION ACCEPT message, specifically, reference may be made to the description of the REGISTRATION ACCEPT message content in section 8.2.7 of TS24.501, and the description of T3346IE of the REGISTRATION request message content in section 8.2.9, in this embodiment, the description of T3346IE in the REGISTRATION ACCEPT message is shown in table 1, and table 1 is the REGISTRATION ACCEPT message content.

TABLE 1

Step 103: and the network side equipment sends the registration acceptance message to the UE, so that the UE determines the congestion state of the network side according to whether the registration acceptance message carries the information element of the mobile backoff timer.

In this step, the network side device sends a registration acceptance message carrying information elements of a mobile backoff timer to the UE, and after receiving the registration acceptance message, the UE determines the congestion state of the network side according to the information elements of the mobile backoff timer in the registration acceptance message, where the determination process is as follows:

when the registration acceptance message carries an information element of a mobile backoff timer, the UE determines that congestion exists at a network side; or when the registration accept message does not carry an information element of a mobility backoff timer and the UE does not currently run the mobility backoff timer, the UE determines that there is no congestion at the network side, and a specific implementation process thereof is detailed in the embodiment shown in fig. 2 below.

In the embodiment of the present invention, a network side device receives a mobile registration update request sent by a UE in a connected state, generates a registration acceptance message, and when a network is in a congested state and the UE is in the connected state, carries an information element of a mobile backoff timer in the registration acceptance message sent to the UE, so that the UE determines the congested state of the network side according to whether the registration acceptance message carries the information element of the mobile backoff timer, thereby avoiding the UE from subsequently initiating an unnecessary non-access stratum request message, such as a Mobility Management (MM) request message, a Service Management (SM) request message, and the like). The embodiment not only reduces the signaling overhead, but also improves the utilization rate of the air interface resources.

Optionally, in another embodiment, on the basis of the above embodiment, the method may further include: and under the condition that the network is not in NAS level congestion control, the registration acceptance message does not carry an information element of the mobile backoff timer. That is to say, when the network is normal, the network side device sends the registration acceptance message not carrying the information element of the mobile backoff timer to the UE, so that the UE can determine the congestion condition of the network according to whether the UE has a running mobile backoff timer, and determine whether to send the non-access stratum request message according to the determined network congestion result.

In this embodiment, when the network is normal, the AMF may send a registration accept message of an information element that does not carry a mobile backoff timer to the UE, so that the UE determines the congestion condition of the network according to whether there is a running mobile backoff timer after receiving the registration accept message of the information element that does not carry the mobile backoff timer. For example, after receiving a registration acceptance message not carrying a mobile backoff timer, when the UE is in an idle state after completing registration, determining whether the UE has a running mobile backoff timer, if so, continuing to run the mobile backoff timer, and when the remaining time of the running mobile backoff timer is zero; sending a non-access stratum request message to the AMF; and if not, the UE directly sends a non-access stratum request message to the AMF without congestion of the network.

In the embodiment of the invention, when the network is not under the condition of NAS level congestion control and the UE is in a connection state, the network side equipment directly sends the registration acceptance message of the information element which does not carry the mobile backoff timer to the UE to inform the UE of the current network condition, so that the UE can judge the congestion condition of the network according to whether the UE has the running mobile backoff timer, and the UE is prevented from subsequently initiating unnecessary non-access stratum request messages.

Referring to fig. 2, a flowchart of a network congestion indication method according to an embodiment of the present invention is shown, where the method is applied to a 5G system, and the method includes:

step 201: user Equipment (UE) in a connected state sends a mobile registration updating request to access network side equipment;

in this step, when the network is in a congested state and the UE is in a connected state, the UE sends a mobile Registration update request to an access network side device (e.g., AMF), and after receiving the mobile Registration update request, the network side device performs processes and operations such as authentication, Registration, and the like on the UE, which may specifically refer to steps 2-20 of 4.2.2.2Registration procedures section of 3GPP protocol TS23.502, which are well known technologies for those skilled in the art and are not described herein again.

Step 202: the UE receives a registration acceptance message sent by the network side equipment;

wherein, the registration acceptance message may include an information element of a mobility backoff timer used to indicate a network congestion indication:

in this step, when receiving a mobile registration update request sent by a UE, a network side device first generates a corresponding registration acceptance message, and then adds an information element of a mobile backoff timer used to indicate network congestion in the registration acceptance message according to a backoff algorithm according to a congestion condition of a network. The back-off algorithm is well known to those skilled in the art, and will not be described herein. The information element of the mobile backoff timer is added to the registration acceptance message, the specific adding position of the information element is detailed in table 1, which is not described herein again, and finally, the registration acceptance message with the information element of the mobile backoff timer is sent to the UE, that is, the UE receives the registration acceptance message with the information element of the mobile backoff timer.

And then, after receiving the registration acceptance message sent by the network side equipment, the UE sends a registration completion message to the network side equipment.

Step 203: the UE determines the congestion state of the network side according to whether the registration acceptance message carries the information element of the mobile backoff timer

One way of determining is: when the registration acceptance message carries an information element of a mobile backoff timer, the UE determines that congestion exists at a network side; and when the registration acceptance message does not carry the information element of the mobile backoff timer and the UE does not have the running mobile backoff timer, the UE determines that the network side has no congestion.

In the embodiment of the invention, when the UE receives the registration acceptance message sent by the network side equipment, the congestion state of the network side is determined according to the information element of the mobile backoff timer carried in the registration acceptance message, and the UE is prevented from subsequently initiating unnecessary non-access stratum request messages. The embodiment of the invention not only reduces the signaling overhead, but also improves the utilization rate of air interface resources.

Optionally, in another embodiment, on the basis of the above embodiment, the method may further include: after the UE determines the congestion state of the network side according to whether the registration acceptance message carries an information element of the mobile backoff timer, the method may further include: and when the network side is not congested, the UE sends an NAS request message to the network side equipment.

In this embodiment, when there is no congestion on the network side, if the UE is in an idle state, a non-access stratum request message may be sent to the network side device. The UE in the idle state means that a channel between the UE and the network side is in the idle state.

Alternatively, in another embodiment, which is based on the above-described embodiment,

after the UE receives the registration accept message sent by the network side device, the method may further include: when the information element of the mobile backoff timer is carried in the registration acceptance message, the UE judges whether the UE has the running mobile backoff timer, if so, the running mobile backoff timer is deleted, and the corresponding mobile backoff timer is started according to the information element of the mobile backoff timer carried in the registration acceptance message; and if not, starting the corresponding mobile backoff timer according to the information element of the mobile backoff timer carried in the registration acceptance message.

That is to say, in this embodiment, after receiving a registration acceptance message carrying an information element of a mobile backoff timer, a UE first determines whether its own mobile backoff timer is running, and if so, deletes the running mobile backoff timer first, and then starts a corresponding mobile backoff timer according to the information element of the mobile backoff timer carried in the registration acceptance message; and if the UE judges that no running mobile back-off timer exists, the UE starts the corresponding mobile back-off timer according to the information element of the mobile back-off timer carried in the registration acceptance message.

Optionally, in another embodiment, on the basis of the foregoing embodiment, after starting the corresponding mobile backoff timer, the method may further include: and after the remaining time of the mobile backoff timer is zero, the UE sends an NAS request message to network side equipment.

In this step, when the UE is in an idle state and the remaining time of the started mobile backoff timer is zero, the UE sends an NAS request message to the network side device;

in this step, according to the determined network congestion result, if the UE is in an idle state, the NAS request message may be sent to the network side device when the remaining time of the started mobile backoff timer is zero. The UE in the idle state means that a channel between the UE and the network side device is in the idle state.

The other mode is as follows: and if the UE is in an idle state and the started mobile backoff timer runs, the UE does not send an NAS request message to the AMF.

In this step, according to the determined network congestion result, if the started mobile backoff timer is running while the UE is in an idle state, the UE cannot send an NAS request message to the network side device.

It should be noted that the NAS request message in this embodiment or the following embodiments refers to other NAS request messages initiated by the UE after the registration is completed, such as a service request message, a Protocol Data Unit (PDU) Session Management message, a Mobility Management (MM) request message, a Session Management (SM) request message, and the like.

In the embodiment of the invention, when the UE receives the registration acceptance message sent by the network side equipment, the network congestion state is judged according to the information element of the mobile backoff timer carried in the registration acceptance message, so that the UE is prevented from subsequently initiating an unnecessary NAS request message. The embodiment of the invention not only reduces the signaling overhead, but also improves the utilization rate of air interface resources.

Optionally, in another embodiment, on the basis of the foregoing embodiment, after the UE receives the registration accept message sent by the network side device, the method may further include:

when the registration acceptance message does not carry an information element of a mobile backoff timer and the UE has the running mobile backoff timer, the UE continues to run the mobile backoff timer;

and after the remaining time of the mobile backoff timer is zero, the UE sends an NAS request message to network side equipment.

That is to say, after receiving a registration acceptance message of an information element not carrying a mobile backoff timer, the UE first determines whether the UE has a running mobile backoff timer, if so, the UE continues to run the mobile backoff timer, and after the remaining time of the mobile backoff timer is zero, the UE sends an NAS request message to the network side device; and if the running mobile back-off timer does not exist, indicating that the network is not congested, and directly sending a NAS request message to the AMF.

In the embodiment of the invention, after receiving the registration acceptance message which is sent by the network side equipment and does not carry the information element of the mobile backoff timer, the UE judges the network congestion state according to whether the UE has the running mobile backoff timer, thereby avoiding the UE from initiating unnecessary NAS request messages subsequently. The embodiment of the invention not only reduces the signaling overhead, but also improves the utilization rate of air interface resources.

It should be noted that, for simplicity of description, the 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 illustrated order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments of the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.

Referring to fig. 3, a schematic structural diagram of a network congestion indicating apparatus according to an embodiment of the present invention is applied to a network side device, and specifically includes: a receiving module 31, a generating module 32 and a transmitting module 33, wherein,

a receiving module 31, configured to receive a mobile registration update request sent by a UE in a connected state;

a generating module 32, configured to generate a registration acceptance message, where the registration acceptance message carries an information element of a mobility backoff timer when a network is in non-access stratum NAS level congestion control;

a sending module 33, configured to send the registration acceptance message to the UE, so that the UE determines a congestion state of a network side according to whether the registration acceptance message carries an information element of a mobile backoff timer.

Optionally, in another embodiment, on the basis of the foregoing embodiment, in a case that the network is not in NAS level congestion control, the registration acceptance message sent by the sending module 33 does not carry an information element of the mobility backoff timer.

Optionally, the network congestion indicating apparatus may be integrated on a network side device, such as an access management function entity AMF, or may be deployed independently, which is not limited in this embodiment.

Referring to fig. 4, another schematic structural diagram of a network congestion indicating apparatus according to an embodiment of the present invention is shown, where the apparatus is applied to a UE, and the apparatus includes: a first sending module 41, a receiving module 42 and a determining module 43, wherein,

a first sending module 41, configured to send a mobile registration update request to an access network side device when the UE is in a connected state;

a receiving module 42, configured to receive a registration acceptance message sent by the network side device;

a determining module 43, configured to determine a congestion state of the network side according to whether the registration accept message carries an information element of the mobile backoff timer.

Optionally, in another embodiment, on the basis of the foregoing embodiment, the determining module 43 is specifically configured to determine that congestion exists at a network side when the registration acceptance message carries an information element of a mobility backoff timer; or, when the registration acceptance message does not carry an information element of a mobile backoff timer and the UE does not have a running mobile backoff timer, the UE determines that there is no congestion on the network side.

Optionally, in another embodiment, on the basis of the above embodiment, the apparatus may further include: a second sending module (not shown), wherein,

and a second sending module, configured to send a NAS request message to the network side device after the determining module determines the congestion state of the network side according to whether the registration acceptance message carries an information element of the mobile backoff timer and when there is no congestion on the network side.

Optionally, in another embodiment, on the basis of the above embodiment, the apparatus may further include: the structure of the judging module 51, the deleting module 52, the first starting module 53 and the second starting module 54 is schematically shown in fig. 5, wherein,

a determining module 51, configured to, after the receiving module 42 receives the registration acceptance message sent by the network-side device, determine whether the mobile backoff timer has a running mobile backoff timer if the registration acceptance message carries an information element of the mobile backoff timer;

a deleting module 52, configured to delete the running mobile backoff timer when the determining module determines that there is the running mobile backoff timer;

a first starting module 53, configured to start a corresponding mobile backoff timer according to an information element of the mobile backoff timer carried in the registration acceptance message after the deleting module 52 deletes the running mobile backoff timer;

a second starting module 54, configured to start a corresponding mobile backoff timer according to an information element of the mobile backoff timer carried in the registration acceptance message when the determining module 51 determines that there is no running mobile backoff timer.

Optionally, in another embodiment, on the basis of the above embodiment, the apparatus may further include: a third sending module (not shown), wherein,

a third sending module, configured to send an NAS request message to the network side device after a remaining time of starting the mobility backoff timer by the first starting module or the second starting module is zero.

Optionally, in another embodiment, on the basis of the above embodiment, the apparatus may further include: the operation module 61 and the fourth sending module 62 are schematically shown in fig. 6, wherein,

an operation module 61, configured to, after the receiving module 42 receives the registration acceptance message sent by the network side device, if the registration acceptance message does not carry an information element of a mobility backoff timer and the UE has a running mobility backoff timer, continue to run the mobility backoff timer;

a fourth sending module 62, configured to send a NAS request message to a network side device after a remaining time of the mobility backoff timer run by the running module 61 is zero.

Optionally, the network congestion control apparatus may be integrated on the UE, or may be deployed independently, which is not limited in this embodiment.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

In the embodiment of the invention, when a network is in a congestion state and a UE (user equipment), network side equipment receives a mobile registration update request sent by the UE in a connection state, generates a corresponding registration acceptance message, and under the condition that the network is in NAS level congestion control, the registration acceptance message carries an information element of a mobile backoff timer, and then sends the registration acceptance message carrying the information element of the mobile backoff timer to the UE to inform the current congestion state of the network of the UE, and the UE determines the congestion state of the network side according to whether the registration acceptance message carries the information element of the mobile backoff timer or not. Avoiding the UE from subsequently initiating unnecessary non-access stratum request messages. The embodiment not only reduces the signaling overhead, but also improves the utilization rate of the air interface resources.

For ease of understanding, reference is also made to the following application examples;

please refer to fig. 7, which is a flowchart of a first application example provided in the embodiment of the present invention, wherein entities involved in the embodiment are, for example, user equipment UE, Radio Access Network (RAN), and Access management function entity AMF (Network side device in the embodiment takes AMF as an example). In this embodiment, the network is under NAS level congestion control, the UE is in a connected state and has no running mobility backoff timer (with a value of T3346), and after receiving a mobility Registration update request sent by the UE, the AMF carries an information element of the mobility backoff timer in a Registration Accept message (Registration Accept message) fed back to the UE. The specific interactive process comprises the following steps:

step 701: the network is currently in the congestion control of the NAS level, the UE is in a connected state and has no running mobile backoff timer;

step 702: the UE accesses the RAN through the 3GPP and sends a mobile Registration update request (Registration request) message to the AMF;

step 703: the AMF authenticates and authenticates the UE to complete the subsequent registration process and operation description; the specific process is the same as the steps 2-20 of the 4.2.2.2Registration procedure section of the 3GPP protocol TS23.502, which is not described herein again;

step 704: the AMF generates a registration acceptance message, and adds an information element of a mobile backoff timer in the registration acceptance message under the condition that the network is in non-access stratum (NAS) level congestion control;

in this step, since the network is under NAS level congestion control, but the AMF does not reject the mobile Registration update request of the UE, the AMF adds an information element of the mobile backoff timer to the Registration Accept message (Registration Accept);

step 705: the AMF sends a registration acceptance message of the information element added with the mobile backoff timer to the UE;

step 706: after receiving the registration acceptance message of the information element carrying the mobile backoff timer, the UE immediately starts the corresponding mobile backoff timer;

step 707: the UE accesses the RAN through 3GPP and sends a Registration Complete message to the AMF.

In this step, when the UE is in an idle state after registration is completed and the remaining time of the started mobile backoff timer is zero, the UE sends a non-access stratum request message to the AMF. Or, when the UE is in an idle state after the registration is completed, the UE does not send a non-access stratum request message to the AMF during the running of the started mobility backoff timer.

Referring to fig. 8, a flowchart of a second application example provided in an embodiment of the present invention is applied to a 5G system, where entities involved in the embodiment include a user equipment UE, a radio access network RAN, and an access management function entity AMF. In this embodiment, the network is under NAS level congestion control, the UE is in a connected state and has a running mobile backoff timer, the AMF sends an information element of the mobile backoff timer carried in the registration acceptance message to the UE, and the specific interaction process includes:

step 801: the network is currently in the congestion control of the NAS level, the UE is in a connected state and has a running mobile backoff timer;

step 802: the UE accesses the RAN through the 3GPP and sends a mobile Registration update request (Registration request) message to the AMF;

step 803: the AMF authenticates and authenticates the UE to complete the subsequent registration process and operation description; the specific process is the same as the steps 2-20 of the 4.2.2.2Registration procedure section of the 3GPP protocol TS23.502, which is not described herein again;

step 804: the AMF generates a registration acceptance message, and adds an information element of a mobile backoff timer in the registration acceptance message under the condition that the network is in non-access stratum (NAS) level congestion control;

step 805: the AMF sends a registration acceptance message of the information element added with the mobile backoff timer to the UE;

step 806: the UE deletes the running mobile back-off timer and immediately starts the mobile back-off timer corresponding to the information element in the registration acceptance message;

step 807: the UE accesses the RAN through 3GPP and sends a Registration Complete message to the AMF.

In this step, when the UE is in an idle state after registration is completed and the remaining time of the started mobile backoff timer is zero, the UE sends a non-access stratum request message to the AMF. Or, when the UE is in an idle state after registration is completed and during the running period of the started mobility backoff timer, the UE does not send a non-access stratum request message to the AMF.

Referring to fig. 9, a flowchart of a third application example provided in an embodiment of the present invention is applied to a 5G system, where entities involved in the embodiment include a user equipment UE, a radio access network RAN, and an access management function entity AMF. In this embodiment, the network is under NAS level congestion control, the UE is in a connected state and does not have a running mobility backoff timer, the AMF does not carry an information element of the mobility backoff timer in the registration acceptance message, and the specific interaction process includes:

step 901: the network is currently in the congestion control of the NAS level, the UE is in a connected state and has no running mobile backoff timer;

step 902: the UE accesses the RAN through the 3GPP and sends a mobile Registration update request (Registration request) message to the AMF;

step 903: the AMF authenticates and authenticates the UE to complete the subsequent registration process and operation description; the specific process is the same as the steps 2-20 of the 4.2.2.2Registration procedure section of the 3GPP protocol TS23.502, which is not described herein again;

step 904: when the network is in non-NAS level congestion control (namely the network is normal), the AMF sends a registration acceptance message which does not carry the information element of the mobile backoff timer to the UE;

in this step, the AMF does not reject the mobile registration update request of the UE because the network is under NAS level congestion control, and after the network is normal, the AMF sends a registration accept message not carrying the information element of the mobile backoff timer to the UE.

Step 905: after receiving the registration acceptance message of the information element which does not carry the mobile backoff timer, the UE judges that the UE does not have the mobile backoff timer running, if so, the network is not congested, and continues the subsequent registration process;

step 906: the UE accesses the RAN through 3GPP and sends a Registration Complete message to the AMF.

In this step, when the UE determines that there is no mobile backoff timer that continues to operate, the network is not congested, and when the UE is in an idle state after registration is completed, a non-access stratum request message is sent to the AMF.

Referring to fig. 10, a flowchart of a fourth application example provided in an embodiment of the present invention is shown, where the entities in the embodiment include a user equipment UE, a radio access network RAN, and an access management function entity AMF. In this embodiment, the network is under NAS level congestion control, the UE is in a connected state and has a running mobile backoff timer, the AMF does not carry an information element of the mobile backoff timer in the registration acceptance message, and the specific interaction process includes:

step 1001: the network is currently in the congestion control of the NAS level, the UE is in a connected state and has a running mobile backoff timer;

step 1002: the UE accesses the RAN through the 3GPP and sends a mobile Registration update request (Registration request) message to the AMF;

step 1003: the AMF authenticates and authenticates the UE to complete the subsequent registration process and operation description; the specific process is the same as the steps 2-20 of the 4.2.2.2Registration procedure section of the 3GPP protocol TS23.502, which is not described herein again;

step 1004: when the network is in non-NAS level congestion control (namely the network is normal), the AMF sends a registration acceptance message which does not carry the information element of the mobile backoff timer to the UE;

Step 1005: after receiving the registration acceptance message of the information element which does not carry the mobile backoff timer, if the UE judges that the UE has the running mobile backoff timer, continuing to run the currently running mobile backoff timer; the specific determination process is described above, and will not be described herein again.

Step 1006: the UE accesses the RAN through 3GPP and sends a Registration Complete message to the AMF.

That is, in this step, the UE transmits a registration completion message to the AMF after receiving the registration accept message.

And then, when the UE is in an idle state after the registration is finished and the residual time of the started mobile backoff timer is zero, the UE sends a non-access stratum request message to the AMF.

In the embodiment of the invention, when the network is in a congestion state and the UE is in a connection state, the AMF receives a mobile registration update request sent by the UE, and sends a registration acceptance message which does not carry information elements of a mobile backoff timer to the UE to inform the UE of the current congestion state of the network, and the UE judges the network congestion state by combining whether the UE has the running mobile backoff timer or not, so that the UE is prevented from subsequently initiating unnecessary non-access stratum request messages. The embodiment not only reduces the signaling overhead, but also improves the utilization rate of the air interface resources.

Preferably, an embodiment of the present invention further provides a user equipment, including: the network congestion indication method comprises a memory, a processor and a computer program which is stored in the memory and can run on the processor, wherein when the computer program is executed by the processor, each process of the network congestion indication method embodiment is realized, the same technical effect can be achieved, and details are not repeated here to avoid repetition.

Preferably, an embodiment of the present invention further provides a network device, which includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor, where the computer program, when executed by the processor, implements each process of the foregoing network congestion indication method embodiment, and can achieve the same technical effect, and details are not repeated here to avoid repetition.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the foregoing network congestion indicating method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of 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, embodiments of 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.

Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (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 terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, 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 terminal 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 terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal 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 of these 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 embodiments of the invention.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.

The method, the device and the equipment for indicating network congestion provided by the invention are introduced in detail, a specific example is applied in the text to explain the principle and the implementation mode of the invention, and the description of the above 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 network congestion indication, the method comprising:

the network side equipment sends the registration acceptance message to the UE, so that the UE determines the congestion state of the network side according to whether the registration acceptance message carries the information element of the mobile backoff timer;

the UE determines a congestion state of a network side according to whether the registration acceptance message carries an information element of a mobile backoff timer, specifically including:

when the registration acceptance message carries an information element of a mobile backoff timer, the UE determines that congestion exists at a network side; or

When the registration acceptance message does not carry an information element of a mobile backoff timer and the UE does not run the mobile backoff timer currently, the UE determines that congestion does not exist on a network side;

when the registration acceptance message carries an information element of a mobile backoff timer, after the UE determines that congestion exists at the network side, the method further includes:

starting a corresponding mobile backoff timer according to an information element of the mobile backoff timer carried in the registration acceptance message;

if the UE is in an idle state and the started mobile backoff timer runs, the UE does not send an NAS request message to the AMF; the UE is in an idle state, including that a channel between the UE and the network side equipment is in an idle state.

2. The method of claim 1, wherein an information element of a mobility backoff timer is not carried in the registration accept message when the network is not in NAS level congestion control.

3. A method for indicating network congestion, comprising:

the UE determines the congestion state of a network side according to whether the registration acceptance message carries the information element of the mobile backoff timer;

when the registration acceptance message carries an information element of a mobile backoff timer, the UE determines that congestion exists at a network side; when the registration acceptance message does not carry an information element of a mobile backoff timer and the UE does not have the running mobile backoff timer, the UE determines that congestion does not exist at a network side;

4. The method of claim 3, wherein after determining the congestion status of the network side according to whether the registration accept message carries an information element of a mobility backoff timer, the UE further comprises:

and when the network side is not congested, the UE sends an NAS request message to the network side equipment.

5. The method according to claim 3, wherein after receiving the registration accept message sent by the network side device, the UE further comprises:

when the information element of the mobile backoff timer is carried in the registration acceptance message, the UE judges whether the UE has the running mobile backoff timer, if so, the running mobile backoff timer is deleted, and the corresponding mobile backoff timer is started according to the information element of the mobile backoff timer carried in the registration acceptance message; and if not, starting the corresponding mobile backoff timer according to the information element of the mobile backoff timer carried in the registration acceptance message.

6. The method of claim 5, further comprising, after starting the respective mobile backoff timer:

7. The method according to claim 3, wherein after receiving the registration accept message sent by the network side device, the UE further comprises:

8. A network congestion indicating device is applied to a network side device, and is characterized in that the device comprises:

a sending module, configured to send the registration acceptance message to the UE, so that the UE determines a congestion state of a network side according to whether the registration acceptance message carries an information element of a mobile backoff timer;

the sending module is specifically configured to send the registration acceptance message to the UE, so that when the registration acceptance message carries an information element of a mobile backoff timer, the UE determines that congestion exists at a network side; or when the registration acceptance message does not carry the information element of the mobile backoff timer and the UE does not run the mobile backoff timer currently, determining that congestion does not exist at the network side;

9. The apparatus of claim 8, wherein the registration accept message sent by the sending module does not carry an information element of a mobility backoff timer in a case that a network is not in NAS level congestion control.

10. A network congestion indication device applied to a UE (user equipment), the device comprising:

a determining module, configured to determine a congestion state of a network side according to whether the registration acceptance message carries an information element of a mobile backoff timer;

the determining module is specifically configured to determine that congestion exists at a network side when the registration acceptance message carries an information element of a mobile backoff timer; or, when the registration acceptance message does not carry an information element of a mobile backoff timer and the UE does not have a running mobile backoff timer, the UE determines that there is no congestion on the network side;

11. The apparatus of claim 10, further comprising:

12. The apparatus of claim 10, further comprising:

a determining module, configured to determine, after the receiving module receives the registration acceptance message sent by the network-side device, whether the registration acceptance message carries an information element of a mobile backoff timer, if the registration acceptance message carries the information element of the mobile backoff timer, that the receiving module has the running mobile backoff timer;

the deleting module is used for deleting the running mobile backoff timer when the judging module judges that the running mobile backoff timer exists;

a first starting module, configured to start a corresponding mobile backoff timer according to an information element of the mobile backoff timer carried in the registration acceptance message after the deletion module deletes the running mobile backoff timer;

and a second starting module, configured to start a corresponding mobile backoff timer according to an information element of the mobile backoff timer carried in the registration acceptance message when the determining module determines that there is no running mobile backoff timer.

13. The apparatus of claim 12, further comprising:

a third sending module, configured to send a NAS request message to the network side device after a remaining time of the mobile backoff timer started by the first starting module or the second starting module is zero.

14. The apparatus of claim 10, further comprising:

an operation module, configured to, after the receiving module receives a registration acceptance message sent by the network side device, if the registration acceptance message does not carry an information element of a mobile backoff timer and the UE has a running mobile backoff timer, continue to run the mobile backoff timer;

a fourth sending module, configured to send an NAS request message to the network side device after a remaining time of the mobility backoff timer run by the running module is zero.

15. A network device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the network congestion indication method according to claim 1 or 2.

16. A user device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which when executed by the processor implements the steps of the network congestion indication method according to any of claims 3 to 7.

17. A computer-readable storage medium, characterized in that a computer program is stored thereon, which computer program, when being executed by a processor, carries out the steps in the network congestion indicating method according to any one of claims 1 to 2, or carries out the steps in the network congestion indicating method according to any one of claims 3 to 7.