CN113905426A

CN113905426A - Communication method, device and system

Info

Publication number: CN113905426A
Application number: CN202111006886.7A
Authority: CN
Inventors: 梅赟; 马锴; 杨泉; 周海涛; 蔡慧
Original assignee: Alibaba Damo Institute Hangzhou Technology Co Ltd
Current assignee: Hangzhou AliCloud Feitian Information Technology Co Ltd
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2022-01-07
Anticipated expiration: 2041-08-30
Also published as: CN113905426B

Abstract

The embodiment of the application provides a communication method, equipment and a system. The method is suitable for network equipment in a mobile communication network, and comprises the following steps: acquiring frequency band information corresponding to the mobile communication network; and sending the frequency band information corresponding to the mobile communication network to user equipment, so that the user equipment stores the frequency band information corresponding to the mobile communication network for reference when network relocation is carried out. The technical scheme provided by the embodiment of the application is used for improving the network-residing speed of the user equipment and reducing the time consumed by network-residing.

Description

Communication method, device and system

Technical Field

The present application relates to the field of wireless communication technologies, and in particular, to a communication method, device and system.

Background

A cellular network (also referred to as a mobile communication network) is a mobile communication hardware architecture, which includes: user Equipment (UE), access network Equipment, and core network Equipment. Currently, with the continuous development of communication technology, mobile communication networks go through different stages from a first generation mobile communication network (2G) to a fifth generation mobile communication network (5G).

An interface connection needs to be established between an access network device and a core network device in a mobile communication network, for example: an S1 connection established based on an S1 interface and an NG connection established based on an NG interface; the UE needs to successfully camp on a cell corresponding to a certain access network device in the mobile communication network. In this way, the UE can perform normal communication using the mobile communication network.

Disclosure of Invention

The embodiment of the application provides a communication method, equipment and a system, which are used for improving the network-residing speed of user equipment and reducing the time consumption of network-residing; it also helps to improve the efficiency of interface connection establishment.

Accordingly, in a first aspect of the present application, a communication method is provided, wherein the method is adapted for a network device in a mobile communication network;

acquiring frequency band information corresponding to the mobile communication network;

and sending the frequency band information corresponding to the mobile communication network to user equipment, so that the user equipment stores the frequency band information corresponding to the mobile communication network for reference when network relocation is carried out.

In a second aspect of the present application, a communication method is provided, where the method is applied to a user equipment in a mobile communication network, and the method includes:

receiving frequency band information corresponding to the mobile communication network, which is sent by network equipment in the mobile communication network;

and storing the frequency band information corresponding to the mobile communication network so as to be referred to when network relocation is carried out.

In a third aspect of the present application, a communication method is provided, wherein the method is applied to a core network device in a mobile communication network; the method comprises the following steps:

acquiring state information of the core network equipment;

generating notification information according to the state information;

and sending the notification information to a target access network device in the mobile communication network for reference by the target access network device when requesting to establish interface connection.

In a fourth aspect of the present application, a communication method is provided, wherein the method is applied to an access network device in a mobile communication network; the method comprises the following steps:

receiving notification information sent by core network equipment in the mobile communication network; the notification information is generated by the core network equipment according to the state information of the core network equipment;

and determining whether to send an interface connection establishment request to the core network equipment or not according to the notification information.

In a fifth aspect of the present application, a communication method is provided, wherein the method is applied to a network device in a mobile communication network;

and sending the frequency band information corresponding to the mobile communication network to an unmanned vehicle, and storing the frequency band information corresponding to the mobile communication network by the unmanned vehicle so as to be referred to when the unmanned vehicle is parked again.

In a sixth aspect of the present application, there is provided a core network device, including: a memory and a processor, wherein,

the memory is used for storing programs;

the processor, coupled to the memory, is configured to execute the program stored in the memory to implement the communication method according to any one of the first aspect, the third aspect, and the fifth aspect.

In a seventh aspect of the present application, there is provided an access network device, wherein the memory and the processor, wherein,

the memory is used for storing programs;

the processor, coupled to the memory, is configured to execute the program stored in the memory to implement the communication method according to the fourth aspect.

In an eighth aspect of the application, there is provided a user equipment, wherein the memory and the processor, wherein,

the memory is used for storing programs;

the processor, coupled to the memory, is configured to execute the program stored in the memory to implement the communication method according to the second aspect.

In a ninth aspect of the present application, there is provided a communication system, comprising: the core network device of the sixth aspect, the access network device of the seventh aspect, and the user equipment of the eighth aspect.

In a tenth aspect of the present application, there is provided a network device, comprising: a memory and a processor, wherein,

the memory is used for storing programs;

the processor, coupled to the memory, is configured to execute the program stored in the memory to implement the communication method according to any one of the first aspect and the fifth aspect.

In an eleventh aspect of the present application, there is provided a communication system, comprising: network equipment and user equipment in a mobile communication network;

the network device is to: acquiring frequency band information corresponding to the mobile communication network; sending the frequency band information corresponding to the mobile communication network to user equipment, and storing the frequency band information corresponding to the mobile communication network by the user equipment so as to be referred to when network relocation is carried out;

the user equipment is configured to: receiving frequency band information corresponding to the mobile communication network, which is sent by network equipment in the mobile communication network; and storing the frequency band information corresponding to the mobile communication network so as to be referred to when network relocation is carried out.

In the technical solution provided in the embodiment of the present application, a network device in a mobile communication network sends frequency band information corresponding to the mobile communication network to a user equipment that has successfully camped in the mobile communication network, and the user equipment stores the frequency band information corresponding to the mobile communication network. Therefore, when the user equipment is subsequently started up, lost or the user closes the flight mode, the network parking is carried out by combining the frequency band information corresponding to the mobile communication network, and compared with the prior art that the full-frequency-band scanning is carried out on all frequency bands supported by the user equipment, the network parking speed can be improved, and the time consumed by the network parking is reduced.

In the technical solution provided in the embodiment of the present application, the core network device generates notification information according to the state information of the core network device, and sends the notification information to a target access network device in the mobile communication network, so that the target access network device refers to the notification information when requesting to establish an interface connection. The notification information indicates the state information of the core network device, and the state information actually indicates whether the core network device currently has the condition for establishing the interface connection. That is to say, in the embodiment of the present application, the core network device opens the state information of the core network device to the access network device, so that after the core network device is accurately ready, the access network device can immediately establish an interface connection with the core network device, and an interface connection establishment request does not need to be sent until the timer polling arrives as in the prior art, which can improve the efficiency of establishing the interface connection.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be 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 some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1a is a basic architecture diagram of a mobile communication network according to an embodiment of the present application;

fig. 1b is a schematic diagram of a connection establishment process of an S1 interface in the prior art according to an embodiment of the present application;

fig. 1c is a schematic diagram of a NG interface connection establishment process in the prior art according to an embodiment of the present application;

fig. 2 is a flowchart illustrating a communication method according to a first embodiment of the present application;

fig. 3 is a first signaling diagram provided in an embodiment of the present application;

fig. 4 is a flowchart illustrating a communication method according to a second embodiment of the present application;

fig. 5 is a flowchart illustrating a communication method according to a third embodiment of the present application;

fig. 6 is a flowchart illustrating a communication method according to a fourth embodiment of the present application;

fig. 7 is a flowchart illustrating a communication method according to a fifth embodiment of the present application;

fig. 8 is a second signaling diagram provided in an embodiment of the present application;

fig. 9 is a block diagram of an electronic device according to an embodiment of the present application.

Detailed Description

Fig. 1a shows the basic architecture of a current mobile communication network, which includes: user equipment 101, access network equipment 102 and core network equipment 103. The number of the access network devices is multiple, and the multiple access network devices integrally form an access network in the mobile communication network; the core network device is typically one or more, and the one or more access network devices collectively form a core network in the mobile communication network. The access network device, which may be specifically a base station, is configured to provide radio coverage and to connect the user equipment and the core network. In the 4G network, the access network device includes an eNB (evolved nodeb), and the core network device includes: MME (Mobility Management Entity) device. In a 5G network, an access network device includes a GNB (next generation base station), and a core network device includes: an AMF (Access and Mobility Management Function) device.

Interface connection needs to be established between the access network device and the core network device, for example: in a 4G network, an S1 interface connection is required to be established between a base station and core network equipment; in the 5G network, NG interface connection needs to be established between the base station and the core network device. S1 is the name of the interface between the base station and the MME that exchanges application layer configuration data. The establishment of the S1 connection means that all application layer data that had previously existed between the eNB and MME will be completely emptied and all data will be re-established. The NG interface is the name of the interface between the base station and the AMF that exchanges application level configuration data. The establishment of the NG connection means that existing application level configuration data in both nodes will be erased and replaced with the received data and the AMF overload status information on the base station will be cleared.

When the user equipment is started, loses the network or the user closes the flight mode, the network staying process, namely the network searching process, needs to be carried out. The network camping process is to find a suitable cell for camping. After the user equipment successfully resides in the network, the communication can be carried out through the mobile communication network.

In the prior art, when a user equipment is turned on, loses network or a user closes a flight mode, all frequency bands supported by the user equipment need to be scanned. Most user equipment can support dozens of frequency bands at present, the number of the frequency bands is probably more, and if a full-frequency-band scanning mode is adopted to carry out network residence, the problem of long time consumption can occur.

In addition, in the prior art, as shown in fig. 1b and 1c, when an access network device (eNB 1021 in fig. 1b or NG-RAN node1022 in fig. 1 c) needs to access a network, the access network device actively sends an interface connection establishment REQUEST (e.g., S1SETUP REQUEST or NGSETUP REQUEST) to a core network device (MME 1031 in fig. 1b or AFM1032 in fig. 1 c), after receiving the interface connection establishment REQUEST, the core network device determines whether to grant access to the access network device according to content carried in the interface connection establishment REQUEST, and if so, returns interface connection establishment RESPONSE information (e.g., S1SETUP RESPONSE or NG SETUP RESPONSE) to the access network device (eNB 1021 in fig. 1b or RAN-node 1022 in fig. 1 c), and establishes the interface connection successfully; and if not, returning interface connection establishment failure information (S1setup failure or NG setup failure) to the access network equipment. When the core network device needs to be restarted or replaced, the access network device will not get any response after sending the interface connection establishment request, and only periodically tries to send the interface connection establishment request, that is, tries to send the interface connection establishment request at preset time intervals (for example, 1 min). That is, in this case, even if the state of the core network device is accurately completed, the access network device still needs to wait until the timer is trained in turn to be able to send the S1SETUP REQUEST or the NG SETUP REQUEST to the core network device, and the interface connection cannot be established in time, which causes a problem of low efficiency.

In the cellular network, a service area is divided into a plurality of cells adjacent to each other, each cell is provided with a base station, and each cell is in a regular hexagon shape.

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below according to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all 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 application.

Further, in some flows described in the specification, claims, and above-described figures of the present application, a number of operations are included that occur in a particular order, which operations may be performed out of order or in parallel as they occur herein. The sequence numbers of the operations, such as 201, 202, etc., are used only to distinguish between the various operations, and do not represent any order of execution per se. Additionally, the flows may include more or fewer operations, and the operations may be performed sequentially or in parallel. It should be noted that, the descriptions of "first", "second", etc. in this document are used for distinguishing different messages, devices, modules, etc., and do not represent a sequential order, nor limit the types of "first" and "second" to be different.

Fig. 2 is a flowchart illustrating a communication method according to an embodiment of the present application. The method is applicable to core network equipment in a mobile communication network. I.e. the method is performed mainly by a network device in a mobile communication network. In one example, the network device may be a core network device; in another example, the network device may be an access network device, and if the network device is an access network device, the access network device may obtain, from the core network device, frequency band information corresponding to the mobile communication network, where the frequency band information may be actively obtained or passively obtained, that is, the core network device actively sends the frequency band information corresponding to the mobile communication network to the access network device, and the access network device forwards the frequency band information corresponding to the mobile communication network to the user equipment after receiving the frequency band information. Hereinafter, a network device will be described as an example of a core network device. As shown in fig. 1, the method includes:

201. and acquiring the frequency band information corresponding to the mobile communication network.

202. And sending the frequency band information corresponding to the mobile communication network to user equipment, so that the user equipment stores the frequency band information corresponding to the mobile communication network for reference when network relocation is carried out.

In the above 201, the frequency band information corresponding to the mobile communication network refers to frequency band information of a frequency band used by the mobile communication network. The frequency bands used by mobile communication networks of different operators are different.

The Mobile communication Network may be a Public Land Mobile Network (PLMN for short).

The method includes acquiring frequency band information corresponding to the mobile communication network, that is, acquiring frequency band information of all frequency bands currently used by the mobile communication network. The frequency band information may include a frequency band number.

In the above 202, the ue refers to a ue that has successfully camped in the mobile communication network, so that the core network device can send information to the ue.

The user equipment stores the received frequency band information corresponding to the mobile communication network, for example: may be stored locally at the user equipment or in a sim (subscriber Identity module) card installed on the user equipment. It should be noted that the storage is permanent storage, and is not lost in power failure.

The core network device may send the frequency band information corresponding to the mobile communication network to the user equipment after the user equipment successfully camps in the mobile communication network, and/or the core network device sends the updated frequency band information corresponding to the mobile communication network to the user equipment after the frequency band information corresponding to the mobile communication network is updated.

Assuming that the user equipment is restarted after being shut down due to a fault after the user equipment stores the frequency band information corresponding to the mobile communication network sent by the core network equipment, a network-residing process needs to be executed after the restart, in the network-residing process, the user equipment can read the stored frequency band information corresponding to the mobile communication network successfully residing last time from a local or an SIM card, and according to the frequency band information, the frequency band used by the mobile communication network can be determined, and the frequency band is scanned to search a cell suitable for residing so as to complete network-residing. Generally speaking, the user equipment rarely changes the SIM card, that is, rarely changes the mobile communication network, and then, network residence is performed based on the frequency band information corresponding to the mobile communication network which was successfully subjected to network residence last time, so that the network residence is successful, the time consumed by network residence is reduced, and the user experience is improved.

In the technical solution provided in the embodiment of the present application, a core network device in a mobile communication network sends frequency band information corresponding to the mobile communication network to a user equipment that has successfully camped in the mobile communication network, and the user equipment stores the frequency band information corresponding to the mobile communication network. Therefore, when the user equipment is subsequently started up, lost or the user closes the flight mode, the network parking is carried out by combining the frequency band information corresponding to the mobile communication network, and compared with the prior art that the full-frequency-band scanning is carried out on all the frequency bands supported by the user equipment, the network parking speed can be improved, and the time consumed by the network parking is reduced.

Further, the frequency band information corresponding to the mobile communication network includes frequency band information corresponding to a target tracking area; wherein the target tracking area refers to a tracking area where the user equipment is currently located. In the above 202, "sending the frequency band information corresponding to the mobile communication network to the user equipment" may specifically include:

2021a, sending the frequency band information corresponding to the target tracking area to the user equipment.

The Tracking Area where the user equipment is currently located may be determined through a Tracking Area Update (TAU) procedure. Here, the tracking area update procedure refers to that when a mobile station (i.e., user equipment) moves from one tracking area TA (tracking area) to another TA, location registration must be performed again on the new TA to inform the network to change its stored location information of the mobile station. Note: a tracking area may have multiple cells, for example: several tens of cells.

The frequency band information corresponding to the target tracking area refers to frequency band information of all frequency bands used by the target tracking area. Generally, the frequency band used by the tracking area specifically refers to a frequency band used by at least one access network device in the tracking area, the frequency bands used by different tracking areas are different, and one tracking area does not use all frequency bands used by the mobile communication network. For example: frequency bands used by the mobile communication network are band1, band2, band3 and band4, frequency bands used by the first tracking area in the mobile communication network are band1 and band2, and frequency bands used by the second tracking area are band3 and band 4.

In this embodiment, instead of sending the frequency band information of all frequency bands used by the mobile communication network to the user equipment, the frequency band information of all frequency bands used by the tracking area where the user equipment is currently located is sent to the user equipment. Generally, the range of a tracking area is relatively large (for example, a city or a county), and the probability that a user moves from one tracking area to another tracking area is relatively small in the process from network loss to network re-establishment, so that the network establishment is performed based on the frequency band information corresponding to the tracking area where the user is located before network loss, and the success probability is relatively high. Therefore, on the basis of ensuring the success rate of network residence, the frequency range of the frequency band required to be scanned when the user equipment is newly resident on the network can be further reduced, and the network residence speed is further improved.

In an example, each access network device may send frequency band information of a frequency band currently used by the access network device to the core network device at preset time intervals.

In another example, each access network device may send frequency band information of a frequency band used by each access network device to a core network of a mobile communication network after the access network device establishes an interface connection (i.e., goes online) with the core network or a frequency band is changed. Therefore, the core network equipment can count the minimum frequency band information and effectively reduce the network resource overhead.

In an example, the "sending the frequency band information corresponding to the target tracking area to the user equipment" in 202 may include one or more of the following steps:

2021b, after the user equipment successfully camps on the network in the mobile communication network, sending the frequency band information corresponding to the target tracking area to the user equipment.

2021c, after the frequency band information corresponding to the target tracking area is updated, sending the updated frequency band information corresponding to the target tracking area to the user equipment.

In the 2021b, specifically, when the ue successfully camps in the mobile communication network, the frequency band information corresponding to the target tracking area may be sent to the ue. That is, when a new user equipment is online, the core network device sends the frequency band information corresponding to the tracking area where the new user equipment is currently located to the new user equipment.

In the 2021c, when a certain base station in the tracking area in the mobile communication network goes off-line, a certain base station goes on-line, or a frequency band of a certain base station is changed, the frequency band used by the corresponding tracking area may be changed, and once the frequency band used by the tracking area is changed, the frequency band information corresponding to the corresponding tracking area may be changed.

And after the frequency band information corresponding to the target tracking area is updated, sending the updated frequency band information corresponding to the target tracking area to the user equipment. Therefore, the success rate of the user equipment for network residence based on the updated frequency band information corresponding to the target tracking area can be improved, and the time consumption for network residence is further reduced.

Further, the method may further include:

203. and when the frequency band used by the tracking area of the mobile communication network is changed, updating the frequency band information corresponding to the tracking area.

The core network device can dynamically update the frequency band information corresponding to each tracking area according to the frequency band information of the frequency band used by the core network device and sent by the access network device.

Further, the method may further include one or more of the following steps:

204. after receiving the frequency band information of the frequency band used by the first access network device, determining whether the frequency band used by the tracking area to which the first access network device belongs changes according to the frequency band information of the frequency band used by the first access network device.

205. After a second access network device in the mobile communication network is disconnected with a core network of the mobile communication network, determining whether a frequency band used by a tracking area to which the second access network device belongs is changed according to frequency band information of a frequency band used by the second access network device, which is sent by the second access network device before the second access network device is disconnected with the core network.

In 204, the first access network device sends the frequency band information of the frequency band used by the first access network device to the core network device after establishing an interface connection (that is, after going online) with the core network of the mobile communication network or after changing the frequency band (that is, after changing the frequency band).

The frequency band information of the frequency band used by the first access network device also carries tracking area information of the tracking area to which the first access network device belongs, so that the tracking area to which the first access network device belongs can be determined according to the tracking area information of the first access network device.

Determining frequency band information currently corresponding to a tracking area to which the first access network equipment belongs according to the frequency band information of the frequency band used by the first access network equipment and the frequency band information which is sent by other access network equipment which belongs to the tracking area to which the first access network equipment belongs for the last time; comparing the current corresponding frequency band information of the tracking area to which the first access network equipment belongs with the last determined frequency band information corresponding to the tracking area to which the first access network equipment belongs, and if the current corresponding frequency band information is different from the last determined frequency band information, indicating that the frequency band used by the tracking area to which the first access network equipment belongs is changed; if the two types of signals are the same, it is indicated that the frequency band used by the tracking area to which the first access network device belongs is not changed.

For example: the frequency bands used by the first access network device include band1 and band2, the tracking area to which the first access network device belongs further includes a third access network device and a fourth access network device, the frequency bands used by the third access network device include band2 and band3, and the frequency bands used by the fourth access network device include band4 and band5, so that the frequency bands currently used by the tracking area to which the first access network device belongs include band1, band2, band3, band4 and band 5. The frequency bands used by the tracking area to which the first access network device belongs determined last time are band2, band3, band4 and band5, and one more frequency band1 determined this time is different, which indicates that the frequency band used by the tracking area to which the first access network device belongs is changed.

205, after the second access network device in the mobile communication network disconnects the interface with the core network of the mobile communication network, that is, after the second access network device is offline.

When it is detected that the interface between the second access network device and the core network is disconnected, the core network device may obtain the frequency band information of the frequency band used by the second access network device sent before the second access network device is disconnected from the core network, and determine whether the frequency band used by the tracking area to which the second access network device belongs is changed according to the frequency band information of the frequency band used by the second access network device sent before the second access network device is disconnected from the core network and the frequency band information sent by other access network devices belonging to the tracking area to which the second access network device belongs last time.

For example: the frequency bands used before the second access network device is offline are band1 and band2, the tracking area to which the second access network device belongs also comprises fifth access network device and sixth access network device, the frequency bands used by the fifth access network device are band2 and band3, the frequency bands used by the fourth access network device are band4 and band5, and due to the fact that the second access network device is offline, the frequency bands currently used by the tracking area to which the second access network device belongs are band2, band3, band4 and band 5. The last determined frequency bands used by the tracking area to which the first access network device belongs are band1, band2, band3, band4 and band5, that is, the determined at least one frequency band1 is different, which indicates that the frequency band used by the tracking area to which the second access network device belongs is changed.

In practical application, as shown in fig. 3, each access network device may send the frequency band information of the frequency band used by each access network device to the core network device when the access network device is online or the frequency band of the base station is changed (corresponding to step 301), and after the core network device receives the frequency band information of the frequency band used by each access network device, the frequency band information corresponding to each tracking area may be updated (corresponding to step 302). Each access network device may also send its device information and/or tracking area information to the core network device, so as to facilitate core network device statistics. The device information may include a device identification and the tracking area information may include a tracking area identification, such as: TAC (Tracking Area Code, Tracking Area number). Of course, each access network device may only send its device information to the core network device, and the core network device determines the tracking area to which each access network device belongs according to the device information of each access network device and the correspondence between the device information of the access network device and the tracking area information of the tracking area to which the access network device belongs, which is stored in advance. When the frequency band set of the TAC1 is updated, the core network device issues messages to all UEs of the base station under the TAC 1: [ TAC 1: band a, band B, band C, band Z ] (corresponding to step 303). When a new UE is on line under TAC1, the core network issues the frequency band set information of TAC1 to the UE: [ TAC 1: band a, band B, band C, band Z ] (corresponding to step 303). Access network device storage [ TAC 1: band a, band B, band C, band Z ] (corresponding to step 304).

In this embodiment, the core network device needs to send the frequency band information corresponding to the mobile communication network or the frequency band information corresponding to the target tracking area to the corresponding access network device, so that the corresponding access network device forwards the frequency band information to the user equipment.

Fig. 4 is a flowchart illustrating a communication method according to another embodiment of the present application. The method is applicable to the user equipment in the mobile communication network, that is, the execution subject of the method is the user equipment. As shown in fig. 4, the method includes:

401. and receiving frequency band information corresponding to the mobile communication network, which is sent by network equipment in the mobile communication network.

402. And storing the frequency band information corresponding to the mobile communication network so as to be referred to when network relocation is carried out.

In the above 402, the relevant content of the frequency band information corresponding to the mobile communication network in the determining process of the frequency band information corresponding to the mobile communication network and when the core network device sends the frequency band information corresponding to the mobile communication network to the user equipment may refer to the corresponding content in the above embodiments, and is not described herein again.

In 402, the user equipment stores the received frequency band information corresponding to the mobile communication network, for example: may be stored locally at the user equipment or in a sim (subscriber Identity module) card installed on the user equipment. It should be noted that the storage is permanent storage, and is not lost in power failure.

Further, the method may further include:

403. and when the user equipment needs to be re-networked, acquiring the stored frequency band information corresponding to the mobile communication network.

404. And performing network residence according to the frequency band information corresponding to the mobile communication network.

In 403, after the user equipment is powered on, or the user turns off the flight mode, the stored frequency band information corresponding to the mobile communication network is acquired.

In 404, at least one frequency band used by the mobile communication network is determined according to the frequency band information corresponding to the mobile communication network. And scanning the at least one frequency band to carry out network residence.

Optionally, before obtaining the stored frequency band information corresponding to the mobile communication network, the method may further include:

405. and acquiring the stored frequency range information of the historical frequency range in which the network is successfully resided last time.

406. Performing network residence according to the frequency band information of the historical frequency band;

and if the network residence fails, triggering the step of acquiring the stored frequency range information corresponding to the mobile communication network.

In this embodiment, before the step 403, frequency band information of a historical frequency band in which network camping was successful last time is also obtained, and the historical frequency band is scanned to perform network camping. If the network camping is successful based on the historical frequency band, the steps 203 and 404 may not be executed. If the network camping fails based on the historical frequency band, the steps 403 and 404 are continuously executed.

Further, the method may further include:

407. and if the network residence fails according to the frequency band information corresponding to the mobile communication network, acquiring the frequency band information of the frequency band supported by the mobile terminal.

408. And performing network residence according to the frequency band information of the frequency band supported by the mobile terminal.

In the embodiment of the present application, in order to ensure that network camping can be successfully performed finally, full-band scanning is required.

Here, it should be noted that: the content of each step in the method provided by the embodiment of the present application, which is not described in detail in the foregoing embodiment, may refer to the corresponding content in the foregoing embodiment, and is not described herein again. In addition, the method provided in the embodiment of the present application may further include, in addition to the above steps, other parts or all of the steps in the above embodiments, and specific reference may be made to corresponding contents in the above embodiments, which is not described herein again.

The technical solutions provided by the above embodiments can be applied to various application fields, for example: the system comprises the fields of live video, video conference, unmanned driving and the like. In the live video field, the user equipment is specifically a live video terminal, and includes: a anchor terminal used by the anchor and a viewer terminal used by the viewer. In the field of video conferencing, the user equipment is specifically a video conferencing terminal: including conference terminals used by parties to a conference. In the field of unmanned driving, the user equipment is specifically an unmanned vehicle.

The technical solution provided by the embodiment of the present application will be described below with reference to an unmanned application scenario. Fig. 5 is a schematic diagram illustrating an interaction processing flow between devices in a mobile communication network according to an embodiment of the present application. As shown in fig. 5, wherein a network device in a mobile communication network is configured to:

501. and acquiring the frequency band information corresponding to the mobile communication network.

502. And sending the frequency band information corresponding to the mobile communication network to an unmanned vehicle, and storing the frequency band information corresponding to the mobile communication network by the unmanned vehicle so as to be referred to when the unmanned vehicle is parked again.

In 502, after the unmanned vehicle successfully camps on the network in the mobile communication network, the frequency band information corresponding to the mobile communication network may be sent to the unmanned vehicle. Or after the frequency band information corresponding to the mobile communication network is updated, the updated frequency band information corresponding to the mobile communication network is sent to the unmanned vehicle.

For details of the implementation processes of the above steps 501 and 502, reference may be made to the contents desired in the above embodiments, which are not described herein again.

In an example, the frequency band information corresponding to the mobile communication network includes frequency band information corresponding to a target tracking area; and the target tracking area refers to a tracking area where the unmanned vehicle is located currently. The "sending the frequency band information corresponding to the mobile communication network to the unmanned vehicle" in 502 may specifically include:

5021. and sending the frequency band information corresponding to the target tracking area to the unmanned vehicle.

Therefore, when the unmanned vehicle needs to be parked in the network again, the unmanned vehicle can be parked in the network based on the frequency band information corresponding to the tracking area where the unmanned vehicle is parked at the last time, and full-frequency-band scanning is not needed, so that the network parking speed is improved. The speed of parking the net is improved, and particularly for an unmanned vehicle in driving, the speed can be beneficial to improving the driving safety.

As shown in fig. 5, wherein an unmanned vehicle in a mobile communication network is used to:

503. and receiving frequency band information corresponding to the mobile communication network, which is sent by network equipment in the mobile communication network.

504. And storing the frequency band information corresponding to the mobile communication network so as to be referred to when network relocation is carried out.

For details of the implementation process of the above steps 503 and 504, reference may be made to the contents desired in the above embodiments, which are not described herein again.

As shown in fig. 5, among other things, the driverless vehicle in the mobile communication network is further configured to:

505. and when the unmanned vehicle needs to be parked again, the stored frequency range information corresponding to the mobile communication network is obtained.

506. And performing network residence according to the frequency band information corresponding to the mobile communication network.

An embodiment of the present application further provides a communication system, including: network equipment and user equipment in a mobile communication network;

the network device is to: acquiring frequency band information corresponding to the mobile communication network; and sending the frequency band information corresponding to the mobile communication network to user equipment, so that the user equipment stores the frequency band information corresponding to the mobile communication network for reference when network relocation is carried out.

In an example, when the network device is specifically a core network device, the communication system may further include: and (4) accessing the network equipment.

The network device is specifically configured to: and sending the frequency band information corresponding to the mobile communication network to access network equipment, so that the access network equipment forwards the frequency band information to user equipment.

Here, it should be noted that: for specific implementation and interaction processes of the network device and the user equipment provided in the embodiments of the present application, reference may be made to corresponding contents in the above embodiments, and details are not described here.

Fig. 6 is a flowchart illustrating a communication method according to another embodiment of the present application. The method is suitable for core network equipment in a mobile communication network, that is, the execution subject of the method is the core network equipment. As shown in fig. 6, the method includes:

601. and acquiring the state information of the core network equipment.

602. And generating notification information according to the state information.

603. And sending the notification information to a target access network device in the mobile communication network for reference by the target access network device when requesting to establish interface connection.

In 601, the status information of the core network device is used to indicate whether the core network device has a condition required for establishing an interface connection. In one example, the state information of the core network device may include: running state information of a process on the core network device related to establishing an interface connection and connection state information of an internetworking protocol connection between the core network device and a target access network device in the mobile communication network. When the running state of the process related to the interface connection establishment on the core network device is normal and the connection state of the internet interconnection protocol connection between the core network device and the target access network device in the mobile communication network is an interworking state, it indicates that the core network device has the conditions required for establishing the interface connection. When the running state of the process related to the interface connection establishment on the core network equipment is abnormal or the connection state of the internetworking protocol connection between the core network equipment and the target access network equipment in the mobile communication network is not intercommunicated, the core network equipment does not have the condition required for establishing the interface connection.

In an example, after the core network device is started, a starting state of a process related to establishing an interface connection on the core network device and a connection state of an internet protocol connection between the core network device and a target access network device in the mobile communication network may be obtained.

In an example, in 601, the notification information may include the status information, so that the access network device may determine whether the core network device has the condition required for establishing the interface connection according to the status information.

In another example, in 601 above, the notification information may include configurable notification information or non-configurable notification information. In one example, the status information indicates that the core network device has the condition required for establishing the interface connection, and the configurable notification information is generated. In another example, the status information indicates that the core network device does not have the condition required for establishing the interface connection (normally, the start state of the process related to establishing the interface connection on the core network device is not normal, but the connection state of the internet protocol connection between the core network device and the target access network device in the mobile communication network is interworking), and the non-establishable notification information is generated.

In 602, the notification information is sent to a target access network device in the mobile communication network, so as to be referred to by the target access network device when requesting to establish an interface connection.

If the notification information is the configurable notification information, the target access network device may immediately send an interface connection establishment request to the core network device after receiving the notification information.

If the notification information is the non-configurable notification information, the target access device may wait for the core network device to send the configurable notification information after receiving the notification information, and then send an interface establishment request to the core network device.

Generally, a period of time is required to pass after the core network device is started until the condition required for establishing the interface connection is met, and when the core network device is started and does not have the condition required for establishing the interface connection, a non-configurable notification message is generated and sent to the target access network device; when the device has the conditions required for establishing the interface connection, a configurable notification message is generated and sent to the target access network device.

Therefore, the access network equipment does not need to periodically try to send the interface establishment request, and the network resource overhead can be reduced; in addition, when the core network equipment has the conditions required for establishing the interface connection, the interface connection can be established with the core network equipment, so that the time consumption for establishing can be shortened, and the efficiency for establishing the interface connection can be further effectively improved.

In an implementation scheme, the "generating notification information according to the state information" in the foregoing 602 may specifically include the following steps:

6021. and determining whether the core network equipment has the condition for establishing interface connection according to the state information.

6022. And generating notification information when the core network equipment is determined to have the condition of establishing interface connection.

When the running state of the process related to the interface connection establishment on the core network device is normal and the connection state of the internet interconnection protocol connection between the core network device and the target access network device in the mobile communication network is an interworking state, it indicates that the core network device has the conditions required for establishing the interface connection. When the running state of the process related to the interface connection establishment on the core network equipment is abnormal or the connection state of the internetworking protocol connection between the core network equipment and the target access network equipment in the mobile communication network is not intercommunicated, the core network equipment does not have the condition required for establishing the interface connection.

In this embodiment, the notification information is generated only when it is determined that the core network device has the condition for establishing the interface connection. After receiving the notification message, the target access device may immediately send an interface establishment request to the core network device.

It should be added that, in this embodiment of the application, the state information of the core network device is used to indicate whether the core network device meets the condition for establishing the interface connection, that is, the state information of the core network device is essentially the state information of the entire core network, the state information of the entire core network meets the condition for establishing the interface connection, and the state information of the core network device can only meet the condition for establishing the interface connection.

Fig. 7 is a flowchart illustrating a communication method according to another embodiment of the present application. The method is suitable for an access network device in a mobile communication network, that is, the execution subject of the method is the access network device. As shown in fig. 7, the method includes:

701. and receiving notification information sent by core network equipment in the mobile communication network.

The notification information is generated by the core network device according to the state information of the core network device.

702. And determining whether to send an interface connection establishment request to the core network equipment or not according to the notification information.

In an example, in the above 702, if the notification information includes status information of the core network device, it may be determined whether the core network device has a condition for establishing an interface connection according to the status information. If so, determining to send an interface connection establishment request to the core network equipment. And if not, determining not to send an interface connection establishment request to the core network equipment.

In another example, in 702, if the notification information is the configurable notification information, it is determined to send an interface connection establishment request to the core network device. And if the notification information is the non-establishable notification information, determining not to send an interface connection establishment request to the core network equipment.

As shown in fig. 8, after the core network device is started, a self-check is performed, that is, the state information of the core network device is obtained, and whether the core network device has a condition for establishing an interface connection is determined according to the state information of the core network device. Generating S1 (or NG) setup sent when determining that the core network device has the condition for establishing interface connection; s1 (or NG) setup sent to the access network device (corresponding to step 801). After receiving the S1 or NG setup request, the access network device sends S1 (or NG) setup request to the core network device (corresponding to step 802). After receiving the setup request of S1 (or NG), the core network device returns S1 (or NG) setup response to the access network device if the access is granted (corresponding to step 803); if the access is not approved, the S1 (or NG) setup failure is returned to the access network device.

In the existing technical solution, there is no S1 (or NG) setup request flow, the base station does not know the state of the current core network, and periodically and blindly sends S1 (or NG) setup request to the core network according to a Stream Control Transmission Protocol (SCTP) Wait Timer. Even if the core network status is ready, the base station needs to poll the timer to send S1 (or NG) setup request to the core network, and the interface connection cannot be established in time.

An embodiment of the present application further provides a communication system, including: core network equipment and access network equipment.

The core network equipment is used for acquiring the state information of the core network equipment; generating notification information according to the state information; sending the notification information to a target access network device in the mobile communication network for reference by the target access network device when requesting to establish an interface connection;

the access network equipment is used for receiving notification information sent by core network equipment in the mobile communication network; the notification information is generated by the core network equipment according to the state information of the core network equipment; and determining whether to send an interface connection establishment request to the core network equipment or not according to the notification information.

Here, it should be noted that: for specific implementation and interaction processes of the core network device and the access network device provided in the embodiment of the present application, reference may be made to corresponding contents in the above embodiments, and details are not described here.

The technical solutions provided by the embodiments of the present application will be described in detail by taking an unmanned vehicle as an example:

suppose that a user takes an unmanned vehicle to work, the unmanned vehicle successfully resides in a cell A (the cell A belongs to a tracking area TAC-1) after being started, and an NG interface connection is established between a base station of the cell A and AFM-1 equipment in a 5G core network. After the unmanned vehicle is successfully parked in the network, AFM-1 equipment sends the frequency band information corresponding to the tracking area TAC-1 collected in advance to the unmanned vehicle through the cell A base station, and the unmanned vehicle stores the frequency band information corresponding to the tracking area TAC-1 locally; the unmanned vehicle can also store the historical frequency band of the successful network parking in the local. In the running process of the unmanned vehicle, the 5G core network is off line due to faults, so that connection of an NG interface between a base station of the cell A and AFM-1 equipment in the 5G core network is disconnected, and the unmanned vehicle is off line. The method comprises the steps that 5G core network is automatically restarted after failure is relieved, AFM-1 equipment acquires state information in real time after being restarted, whether interface connection establishment conditions are met currently is determined according to the state information, NG setup request is sent to a base station of a cell A when the interface connection establishment conditions are met currently, the base station of the cell A receives the NG setup request, the NG setup request is sent to the AFM-1 equipment immediately, the AFM-1 equipment determines that the access can be achieved after receiving the NG setup request, NG setup response is sent to the base station of the cell A, and the base station of the cell A receives the NG setup response, so that successful interface connection establishment is indicated. After the NG interface connection is established between the base station of the cell A and AFM-1 equipment, the base station of the cell A can provide normal communication service. Therefore, after the core network is accurately finished, the access network equipment can immediately establish interface connection with the core network equipment without waiting for polling of the timer, and the efficiency of establishing the interface connection is improved.

Meanwhile, the unmanned vehicle needs to be immediately parked again because the unmanned vehicle drops off the network. The unmanned vehicle can preferentially carry out network parking according to the historical frequency band of the last successful network parking, and if the network parking is unsuccessful, the network parking is carried out according to the frequency band information corresponding to the tracking area TAC-1; and if the network is not successfully parked, the network is parked according to the full frequency band supported by the unmanned vehicle.

The following describes the technical solutions provided in the embodiments of the present application in detail by taking a mobile phone as an example:

when the user travels in the scenic spot in the daytime, the mobile phone is powered off due to power failure. And when the user gets back to the hotel, the mobile phone is charged by the user at night, and the mobile phone is started after the user is charged. At this time, the mobile phone firstly performs network residence according to the locally stored historical frequency band which is successful in network residence last time, and network residence based on the historical frequency band fails because the scenic spot is different from the hotel cell. Therefore, the mobile phone performs network parking according to the locally stored frequency band information corresponding to the tracking area where the core network device is located last time and sent by the base station after the network parking is successful last time, and since the scenic spot and the hotel are in the same tracking area, the network parking is successful based on the frequency band information corresponding to the tracking area where the core network device is located last time. Therefore, full-band scanning is avoided, and the network residence time is shortened.

Fig. 9 shows a schematic structural diagram of a network device according to an embodiment of the present application. As shown in fig. 9, the electronic device includes a memory 1101 and a processor 1102. The memory 1101 may be configured to store other various data to support operations on the electronic device. Examples of such data include instructions for any application or method operating on the electronic device. The memory 1101 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

The memory 1101 is used for storing programs;

the processor 1102 is coupled to the memory 1101, and configured to execute the program stored in the memory 1101, so as to implement the communication method provided by the corresponding method embodiment described above.

Further, as shown in fig. 9, the electronic device further includes: communication components 1103, display 1104, power components 1105, audio components 1106, and the like. Only some of the components are schematically shown in fig. 9, and the electronic device is not meant to include only the components shown in fig. 9.

Accordingly, the present application further provides a computer-readable storage medium storing a computer program, which, when executed by a computer, can implement the steps or functions of the communication method provided by the corresponding method embodiments.

Fig. 9 shows a schematic structural diagram of a core network device according to an embodiment of the present application. As shown in fig. 9, the electronic device includes a memory 1101 and a processor 1102. The memory 1101 may be configured to store other various data to support operations on the electronic device. Examples of such data include instructions for any application or method operating on the electronic device. The memory 1101 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

The memory 1101 is used for storing programs;

Fig. 9 shows a schematic structural diagram of an access network device according to an embodiment of the present application. As shown in fig. 9, the electronic device includes a memory 1101 and a processor 1102. The memory 1101 may be configured to store other various data to support operations on the electronic device. Examples of such data include instructions for any application or method operating on the electronic device. The memory 1101 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

The memory 1101 is used for storing programs;

Fig. 9 shows a schematic structural diagram of a user equipment according to an embodiment of the present application. As shown in fig. 9, the electronic device includes a memory 1101 and a processor 1102. The memory 1101 may be configured to store other various data to support operations on the electronic device. Examples of such data include instructions for any application or method operating on the electronic device. The memory 1101 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

The memory 1101 is used for storing programs;

An embodiment of the present application further provides a communication system, which includes the core network device, the access network device, and the user equipment.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A communication method, wherein the method is applicable to a network device in a mobile communication network;

obtaining frequency band information corresponding to the mobile communication network;

The frequency band information corresponding to the mobile communication network is sent to the user equipment, so that the user equipment stores the frequency band information corresponding to the mobile communication network for reference when relocating to the network.

2. The method according to claim 1, wherein the frequency band information corresponding to the mobile communication network comprises frequency band information corresponding to a target tracking area; wherein, the target tracking area refers to a tracking area where the user equipment is currently located ;

Sending the frequency band information corresponding to the mobile communication network to the user equipment, including:

Send the frequency band information corresponding to the target tracking area to the user equipment.

3. The method according to claim 2, wherein sending the frequency band information corresponding to the target tracking area to the user equipment comprises:

After the user equipment successfully camps on the mobile communication network, it sends the frequency band information corresponding to the target tracking area to the user equipment; and/or

After the frequency band information corresponding to the target tracking area is updated, the updated frequency band information corresponding to the target tracking area is sent to the user equipment.

4. The method according to claim 2 or 3, wherein, further comprising:

When the frequency band used by the tracking area of the mobile communication network changes, the frequency band information corresponding to the tracking area is updated.

5. The method of claim 4, further comprising:

After receiving the frequency band information of the frequency band used by the first access network device, according to the frequency band information of the frequency band used by the first access network device, determine that the first access network device belongs to Whether the frequency band used by the tracking area has changed; wherein, after the first access network device establishes an interface connection with the core network of the mobile communication network or after its frequency band is changed Band information for the band used; and/or

After the second access network device in the mobile communication network disconnects the interface from the core network of the mobile communication network, according to the data sent by the second access network device before disconnecting the interface from the core network. The frequency band information of the used frequency band determines whether the frequency band used by the tracking area to which the second access network device belongs is changed.

6. A communication method, wherein the method is applicable to user equipment in a mobile communication network, the method comprising:

receiving frequency band information corresponding to the mobile communication network sent by a network device in the mobile communication network;

The frequency band information corresponding to the mobile communication network is stored for reference when relocating to the network.

7. A communication method, which is applicable to core network equipment in a mobile communication network; the method comprising:

obtaining status information of the core network device;

generating notification information according to the state information;

The notification information is sent to a target access network device in the mobile communication network for reference by the target access network device when requesting to establish an interface connection.

8. The method of claim 7, wherein generating notification information according to the state information comprises:

According to the state information, determine whether the core network device has the conditions for establishing an interface connection;

When it is determined that the core network device has the conditions for establishing an interface connection, notification information is generated.

9. The method according to claim 7 or 8, wherein acquiring the status information of the core network device comprises:

After the core network device is started, obtain the running status information of the process related to the establishment of the interface connection on the core network device and the Internet connection between the core network device and the target access network device in the mobile communication network. Connection status information for interconnect protocol connections.

10. A communication method, which is applicable to access network equipment in a mobile communication network; the method comprising:

receiving notification information sent by a core network device in the mobile communication network; the notification information is generated by the core network device according to state information of the core network device;

According to the notification information, it is determined whether to send an interface connection establishment request to the core network device.

11. A communication method, wherein the method is applicable to network equipment in a mobile communication network;

The frequency band information corresponding to the mobile communication network is sent to the unmanned vehicle, so that the unmanned vehicle can store the frequency band information corresponding to the mobile communication network for reference when relocating to the network.

12 . The method according to claim 11 , wherein the frequency band information corresponding to the mobile communication network comprises frequency band information corresponding to a target tracking area; wherein the target tracking area refers to the current location of the unmanned vehicle. 13 . tracking area;

Send the frequency band information corresponding to the mobile communication network to the unmanned vehicle, including:

Send the frequency band information corresponding to the target tracking area to the unmanned vehicle.

13. A network device, comprising: a memory and a processor, wherein,

the memory for storing programs;

The processor, coupled with the memory, executes the program stored in the memory to implement the communication method of any one of claims 1 to 5, 11 and 12.

14. A communication system, comprising: network equipment and user equipment in a mobile communication network;

The network device is used for: acquiring frequency band information corresponding to the mobile communication network; sending the frequency band information corresponding to the mobile communication network to the user equipment, so that the user equipment can perform the frequency band information corresponding to the mobile communication network. Store it for reference when relocating to the network;

The user equipment is used for: receiving frequency band information corresponding to the mobile communication network sent by a network device in the mobile communication network; and storing the frequency band information corresponding to the mobile communication network for reference when relocating to the network.