CN112399517B - Terminal switching method and system - Google Patents
Terminal switching method and system Download PDFInfo
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- CN112399517B CN112399517B CN202011404184.XA CN202011404184A CN112399517B CN 112399517 B CN112399517 B CN 112399517B CN 202011404184 A CN202011404184 A CN 202011404184A CN 112399517 B CN112399517 B CN 112399517B
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/02—Access restriction performed under specific conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
Abstract
The invention provides a terminal switching method and a system, wherein the method comprises the following steps: the source base station forwards the network switching request to a target base station according to the network switching request sent by the terminal; the target base station judges whether the terminal is allowed to access or not according to the current slice using condition after receiving the network switching request, and sends an access refusing instruction to a source base station when the judging result is negative; and the source base station acquires the 4G/3G base station meeting the switching condition after receiving the access rejection instruction, sends an access request to the 4G/3G base station, and sends a switching instruction to the terminal when the 4G/3G base station allows the terminal to be accessed so as to switch the terminal to the 4G/3G base station. The method and the system can solve the problem that the user experience is influenced because the network establishment scale is limited, the number of base stations and network equipment is small, and the network switching is easy to fail due to insufficient network resources when the terminal switches the network in the initial 5G network deployment stage.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a terminal switching method and system.
Background
Compared with the 4G network, the 5G network can bring high speed and low time delay for people, and can also bear more applications and massive connection, and all the applications and massive connection are realized by depending on 5G network slices. The 5G system abstracts general physical resources into virtual resources, and then utilizes a core controller to cut and arrange the resources according to specific service requirements, thereby constructing a plurality of customized virtual network slices. The network slicing technology is to divide a physical network of an operator into a plurality of virtual networks, each network is adapted to different service requirements, and different networks can be divided through time delay, bandwidth, security and reliability to adapt to different scenes.
However, although the 5G network can provide faster and higher network speed for the user, at the initial stage of deployment of the 5G network, due to limited network establishment scale and small number of base stations and network devices, it is difficult to fully meet the requirements of the user, and especially when the terminal performs network handover, it is likely that network handover fails due to insufficient network resources and the user requirements cannot be met, thereby affecting user experience.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a terminal switching method and system for solving the above-mentioned deficiencies in the prior art, so as to solve the problem that the user experience is affected due to the fact that the network establishment scale is limited, the number of base stations and network devices is small, and the network switching is easy to fail due to insufficient network resources when the terminal performs network switching at the initial stage of the existing 5G network deployment.
In a first aspect, an embodiment of the present invention provides a terminal handover method, where the method includes:
a source base station forwards a network switching request to a target base station according to the network switching request sent by a terminal, wherein the source base station and the target base station are 5G base stations;
the target base station judges whether the terminal is allowed to access or not according to the current slice using condition after receiving the network switching request, and sends an access refusing instruction to a source base station when the judging result is negative;
and the source base station acquires the 4G/3G base station meeting the switching condition after receiving the access rejection instruction, sends an access request to the 4G/3G base station, and sends a switching instruction to the terminal when the 4G/3G base station allows the terminal to access, wherein the switching instruction carries a 4G/3G base station identifier so that the terminal is switched to the 4G/3G base station.
Preferably, before the source base station forwards the network handover request to the target base station according to the network handover request sent by the terminal, the method further includes:
the source base station receives a network switching request sent by the terminal, wherein the network switching request comprises a terminal identifier, a slice identifier and a service identifier;
and the source base station determines the target base station meeting the conditions according to the current position information of the terminal and the slice identifier.
Preferably, the target base station determines whether to allow the terminal to access according to a current slice use condition, and specifically includes:
the target base station acquires the current slice utilization rate meeting the slice identifier;
the target base station judges whether the current slice utilization rate is smaller than a first threshold value, if so, the terminal is allowed to access;
if not, the target base station further judges whether the current slice utilization rate is smaller than a second threshold value, and if the judgment result is yes, the target base station further judges whether the terminal has a priority attribute;
if the terminal has the priority attribute, allowing the terminal to access, otherwise, refusing the terminal to access;
wherein the first threshold is less than the second threshold.
Preferably, if the current slice usage rate is greater than or equal to the second threshold, the method further includes:
and the target base station judges whether the service corresponding to the service identifier needs to operate in a 5G network, and allows the terminal to access when the service corresponding to the service identifier needs to operate in the 5G network, otherwise, refuses the terminal to access.
Preferably, the determining, by the target base station, whether the terminal has a priority attribute specifically includes:
the target base station judges whether the service corresponding to the service identifier is a high-priority service, if so, the terminal has a priority attribute, otherwise, the target base station further judges whether the user corresponding to the terminal identifier is a priority user;
and if the user corresponding to the terminal identification is a priority user, the terminal has a priority attribute, otherwise, the terminal does not have the priority attribute.
Preferably, before the source base station sends an access request to the 4G/3G base station, the method further includes:
the source base station judges whether the user corresponding to the terminal identification is a priority user;
the sending, by the source base station, an access request to the 4G/3G base station specifically includes:
if the user corresponding to the terminal identifier is a priority user, the source base station sends a switching instruction carrying a priority access instruction and the terminal identifier to the 4G/3G base station, so that the 4G/3G base station reserves resources for the terminal corresponding to the terminal identifier after receiving the priority access instruction;
and if the user corresponding to the terminal identifier is not the priority user, the source base station sends a switching instruction carrying the terminal identifier to the 4G/3G base station.
In a second aspect, an embodiment of the present invention provides a terminal switching system, including a source base station and a target base station, where the source base station and the target base station are 5G base stations, and the source base station includes a request forwarding module, a receiving and acquiring module, a first sending module, and a second sending module;
the request forwarding module is used for forwarding the network switching request to the target base station according to the network switching request sent by the terminal;
the receiving and acquiring module is used for acquiring the 4G/3G base station meeting the switching condition after receiving the access rejection instruction sent by the target base station;
the first sending module is connected with the receiving and acquiring module and used for sending an access request to the 4G/3G base station;
the second sending module is connected with the first sending module and is used for sending a switching instruction to the terminal when the 4G/3G base station allows the terminal to access, wherein the switching instruction carries a 4G/3G base station identifier so that the terminal is switched to the 4G/3G base station;
the target base station comprises a request receiving module, an access judging module and an instruction sending module;
the request receiving module is connected with the request forwarding module and is used for receiving the network switching request forwarded by the request forwarding module;
the access judging module is connected with the request receiving module and used for judging whether the terminal is allowed to be accessed according to the current slice using condition;
the instruction sending module is connected with the access judging module and used for sending an access refusing instruction to the receiving and acquiring module when the judging result of the access judging module is negative.
Preferably, the source base station further comprises a first receiving module and a target base station determining module;
the first receiving module is configured to receive a network switching request sent by the terminal, where the network switching request includes a terminal identifier, a slice identifier, and a service identifier;
and the target base station determining module is used for determining the target base station meeting the conditions according to the current position information of the terminal and the slice identifier.
Preferably, the access judging module includes:
a first obtaining unit, configured to obtain a current slice utilization rate that satisfies the slice identifier;
the first judging unit is used for judging whether the current slice utilization rate is smaller than a first threshold value or not and allowing the terminal to access when the judging result is yes;
a second judging unit, configured to further judge whether the current slice usage rate is smaller than a second threshold when the first judging unit judges that the result is negative;
a third determining unit, configured to further determine whether the terminal has a priority attribute when the determination result of the second determining unit is yes, and allow the terminal to access when the terminal has the priority attribute, otherwise, deny the terminal to access;
wherein the first threshold is less than the second threshold.
Preferably, the access judging module further includes:
a fourth determining unit, configured to determine, when the current slice usage rate is greater than or equal to the second threshold, whether the service corresponding to the service identifier must operate in a 5G network, and allow the terminal to access when the service corresponding to the service identifier must operate in the 5G network, otherwise, deny the terminal access.
According to the terminal switching method and system provided by the embodiment of the invention, after receiving a network switching request sent by a terminal, a source base station forwards the network switching request to a target base station, the target base station judges whether the terminal is allowed to access according to the current slice using condition, and sends an access refusing instruction to the source base station if the judging result is negative, the source base station obtains a 4G/3G base station meeting a switching condition after receiving the access refusing instruction, sends the access request to the 4G/3G base station, and sends the switching instruction to the terminal when the 4G/3G base station allows the terminal to access, so that the terminal is switched to the 4G/3G base station. Therefore, the problem that network switching fails due to insufficient 5G network resources when the terminal performs network switching can be solved, the terminal is switched to a 4G/3G network through a switching instruction sent by a source base station, the current service of the terminal can be guaranteed not to be interrupted, user experience is improved, and the problems that the network switching fails due to the fact that the network building scale is limited, the number of base stations and network equipment is small, network resources are insufficient when the terminal performs network switching, and the user experience is influenced in the initial stage of 5G network deployment are solved.
Drawings
FIG. 1: a flowchart of a terminal switching method according to embodiment 1 of the present invention;
FIG. 2: an interaction schematic diagram of a terminal switching method in embodiment 1 of the present invention;
FIG. 3: a schematic structural diagram of a terminal switching system according to embodiment 2 of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
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 with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but 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.
Example 1:
the present embodiment provides a terminal switching method, as shown in fig. 1, the method includes:
step S102: and the source base station forwards the network switching request to the target base station according to the network switching request sent by the terminal, wherein the source base station and the target base station are 5G base stations.
In this embodiment, the terminal may be a smartphone, a tablet, an unmanned aerial vehicle, an unmanned vehicle, or the like that supports a 5G network. The source base station and the target base station are 5G base stations, and the source base station refers to the base station where the terminal is located currently. The network handover request may include a terminal identifier, a slice identifier of a current request, a service identifier of a current service, and the like, where the terminal identifier may be an IMSI (International Mobile Subscriber Identity).
Optionally, before the source base station forwards the network handover request to the target base station according to the network handover request sent by the terminal, the method may further include:
a source base station receives a network switching request sent by a terminal, wherein the network switching request comprises a terminal identifier, a slice identifier and a service identifier;
and the source base station determines a target base station meeting the conditions according to the current position information and the slice identifier of the terminal.
In this embodiment, the terminal initiates a network handover request to the source base station when the current signal strength value is lower than a preset threshold or the current network resource cannot meet the requirement.
In this embodiment, the source base station determines a target base station that satisfies the condition according to the current location information of the terminal and the requested slice identifier, where each base station stores relevant information of neighboring base stations or base stations within a certain range in advance, including a base station identifier and a slice resource that can be provided, and the target base station may be a base station that is closest to the current location of the terminal and satisfies the slice identifier. The target base station may be one or multiple, if there are multiple target base stations, the source base station may sequentially send a network handover request to the target base stations, and when receiving an instruction for allowing the terminal to access, sent by the multiple target base stations, select an optimal base station from the multiple target base stations, for example, the optimal base station may be a base station closest to the terminal and having a strongest signal, and simultaneously, the source base station sends a handover instruction to the terminal.
Step S104: and the target base station judges whether the terminal is allowed to access or not according to the current slice use condition after receiving the network switching request, and sends an access rejection instruction to the source base station when the judgment result is negative.
It should be noted that, in the 5G Network, each Slice has a unique S-NSSAI (Single Network Slice Selection Assistance Information) Slice identifier, and the gsb side and the AMF (Access and Mobility Management Function) entity side maintain an NSSAI (Network Slice Selection Assistance Information) Slice list, and the Slice on the gsb side is issued by the core Network or is configured in advance.
Optionally, the target base station determines whether to allow the terminal to access according to the current slice usage condition, which may specifically include:
the target base station acquires the current slice utilization rate meeting the slice identification;
the target base station judges whether the current slice utilization rate is smaller than a first threshold value, if so, the terminal is allowed to access;
if not, the target base station further judges whether the current slice utilization rate is smaller than a second threshold value, and if the judgment result is yes, the target base station further judges whether the terminal has a priority attribute;
if the terminal has the priority attribute, allowing the terminal to access, otherwise, refusing the terminal to access;
wherein the first threshold is less than the second threshold.
In this embodiment, the target base station calculates a resource list capable of providing network slices for the terminal according to the number of used slices or the current slice remaining condition, where the resource list includes a slice identifier, a slice type, and a slice remaining resource, and may set a first threshold M and a second threshold N according to the current use condition or the remaining condition of the slice, and preferably set the first threshold M and the second threshold N according to the current slice usage rate, and when different thresholds are reached, the target base station instructs the terminal to selectively access.
In this embodiment, the target base station may monitor the service conditions of different types of slices in real time, and when a first threshold value M is reached, start a priority handover policy, that is, only a terminal with a priority attribute is allowed to access, when a second threshold value N is reached, determine whether to allow access according to a service attribute, and if not, send an access rejection instruction to the source base station. For example, the first threshold M may be 60%, the second threshold N may be 80%, when the current slice utilization rate of the slice resource corresponding to the slice identifier is lower than 60%, the target base station allows all terminals to access, when the current slice utilization rate reaches 60%, the target base station starts a priority handover policy, only the terminal with the priority attribute is allowed to access, and when the current slice utilization rate reaches 80%, whether the terminal is allowed to access is determined according to the service attribute.
Optionally, the determining, by the target base station, whether the terminal has the priority attribute may specifically include:
the target base station judges whether the service corresponding to the service identifier is a high-priority service, if so, the terminal has a priority attribute, otherwise, the target base station further judges whether the user corresponding to the terminal identifier is a priority user;
if the user corresponding to the terminal identification is a priority user, the terminal has a priority attribute, otherwise, the terminal does not have the priority attribute.
In this embodiment, the service corresponding to the service identifier may be a voice service, a short message service, a web browsing service, a video service, a game service, an online live broadcast service, an unmanned aerial vehicle service, and the like. Each base station stores the priority corresponding to each service, for example, the high-priority service may be a service with a high requirement on network real-time performance, for example, if the terminal is a mobile phone, the high-priority service may be a real-time video call service, a game service, or an online live broadcast, etc.; if the terminal is other terminal such as unmanned aerial vehicle, telemedicine, unmanned, etc., the corresponding service can be set as a high priority service because higher network speed and lower time delay are needed. If the user subscribes the priority service, the user can be set as a priority user, and when the current slice utilization rate reaches a first threshold value M, the target base station starts a priority switching strategy in order to better serve the user with the priority attribute.
Optionally, if the current slice usage rate is greater than or equal to the second threshold, the method may further include:
and the target base station judges whether the service corresponding to the service identifier needs to operate in the 5G network or not, allows the terminal to access when the service corresponding to the service identifier needs to operate in the 5G network, and refuses the terminal to access if the service corresponding to the service identifier needs to operate in the 5G network.
In this embodiment, the high-priority service may be a service that must operate in a 5G network, and the service corresponding to the priority user may be a high-priority service or a low-priority service, where the low-priority service has a low requirement on real-time performance, such as a voice service, a short message service, or a web browsing service, and the service may operate in a 4G/3G network. When the current slice utilization rate reaches a second threshold value N, the target base station limits the access of a terminal with a low-priority service, so that the failure of network switching of the terminal which must operate under a 5G network can be avoided under the condition of less slice resources, meanwhile, the interruption of the terminal service which can operate under a 4G/3G network is avoided, and the user experience is improved while the reasonable distribution of the 5G slice resources is realized.
Step S106: and the source base station acquires the 4G/3G base station meeting the switching condition after receiving the access rejection instruction, sends an access request to the 4G/3G base station, and sends a switching instruction to the terminal when the 4G/3G base station allows the terminal to be accessed, wherein the switching instruction carries the 4G/3G base station identifier so that the terminal is switched to the 4G/3G base station.
Optionally, before the source base station sends the access request to the 4G/3G base station, the method may further include:
the source base station judges whether the user corresponding to the terminal identification is a priority user;
the source base station sends an access request to the 4G/3G base station, which may specifically include:
if the user corresponding to the terminal identification is a priority user, the source base station sends a switching instruction carrying a priority access instruction and the terminal identification to the 4G/3G base station, so that the 4G/3G base station reserves resources for the terminal corresponding to the terminal identification after receiving the priority access instruction;
and if the user corresponding to the terminal identifier is not the priority user, the source base station sends a switching instruction carrying the terminal identifier to the 4G/3G base station.
In this embodiment, if the user corresponding to the terminal identifier is a priority user, the access request sent by the source base station to the 4G/3G base station may include the terminal identifier and QoS (Quality of Service) of the user, and the 4G/3G base station reserves a corresponding network resource for the user according to the QoS.
Specifically, referring to fig. 2, an interaction schematic diagram of a terminal handover method provided in an embodiment of the present invention is shown, where a terminal is a 5G terminal, and a source base station and a target base station are gNB 5G base stations, and in this embodiment, the method includes:
step S201: a terminal sends a network switching request to a source base station;
the network switching request comprises a terminal identifier, a slice identifier and a service identifier.
Step S202: the source base station determines a target base station meeting the conditions;
and the source base station determines a target base station meeting the conditions according to the current position information and the slice identifier of the terminal.
Step S203: the source base station transmits a network switching request to the target base station;
step S204: the target base station judges whether the terminal is allowed to access according to the current slice use condition;
specifically, the target base station indicates the terminal to selectively access according to a preset first threshold and a preset second threshold.
Step S205: the target base station judges that the terminal is not allowed to access, and sends an access rejection instruction to the source base station;
step S206: the source base station sends an access request to the 4G/3G base station;
step S207: the 4G/3G base station reserves resources for the terminal according to the priority access indication carried by the access request;
step S208: the 4G/3G base station returns a response to the source base station;
step S209: and the source base station sends a switching instruction to the terminal to indicate the terminal to switch.
In the terminal switching method provided by the embodiment of the invention, after receiving a network switching request sent by a terminal, a source base station forwards the network switching request to a target base station, the target base station judges whether the terminal is allowed to access according to the current slice use condition, and sends an access rejection instruction to the source base station if the judgment result is negative, the source base station obtains a 4G/3G base station meeting a switching condition after receiving the access rejection instruction, sends the access request to the 4G/3G base station, and sends the switching instruction to the terminal when the 4G/3G base station allows the terminal to access, so that the terminal is switched to the 4G/3G base station. Therefore, the problem that network switching fails due to insufficient network resources of a terminal when network switching is carried out can be solved, the terminal is switched to a 4G/3G network through a switching instruction sent by a source base station, the current service of the terminal can be guaranteed not to be interrupted, user experience is improved, and the problems that the network switching fails due to the fact that the network building scale is limited at the initial stage of existing 5G network deployment, the number of base stations and network equipment is small, and the network switching fails due to insufficient network resources when the terminal carries out network switching, and user experience is influenced are solved.
Example 2:
as shown in fig. 2, the present embodiment provides a terminal switching system, which includes a source base station 20 and a target base station 30, where the source base station 20 and the target base station 30 are 5G base stations, and the source base station 20 includes a request forwarding module 21, a receiving and acquiring module 22, a first sending module 23, and a second sending module 24;
a request forwarding module 21, configured to forward a network handover request to the target base station 30 according to the network handover request sent by the terminal;
a receiving and acquiring module 22, configured to acquire a 4G/3G base station that meets a handover condition after receiving an access denial instruction sent by the target base station 30;
the first sending module 23 is connected to the receiving and acquiring module 22, and configured to send an access request to the 4G/3G base station;
the second sending module 24 is connected to the first sending module 23, and is configured to send a switching instruction to the terminal when the 4G/3G base station allows the terminal to access, where the switching instruction carries the identifier of the 4G/3G base station, so that the terminal is switched to the 4G/3G base station;
the target base station 30 comprises a request receiving module 31, an access judging module 32 and an instruction sending module 33;
a request receiving module 31, connected to the request forwarding module 21, for receiving the network switching request forwarded by the request forwarding module 21;
an access judging module 32, connected to the request receiving module 31, for judging whether to allow the terminal to access according to the current slice using condition;
the instruction sending module 33 is connected to the access judging module 32, and is configured to send an access rejection instruction to the receiving and acquiring module 22 when the access judging module 32 judges that the result is negative.
Optionally, the source base station 20 may further include a first receiving module and a target base station determining module;
the first receiving module is used for receiving a network switching request sent by a terminal, wherein the network switching request comprises a terminal identifier, a slice identifier and a service identifier;
and a target base station determining module, configured to determine, according to the current location information of the terminal and the slice identifier, a target base station 30 that meets the condition.
Alternatively, the access judging module 32 may include:
the first acquisition unit is used for acquiring the current slice utilization rate meeting the slice identifier;
the first judgment unit is used for judging whether the current slice utilization rate is smaller than a first threshold value or not and allowing the terminal to access when the judgment result is yes;
the second judging unit is used for further judging whether the current slice utilization rate is smaller than a second threshold value or not when the first judging unit judges that the result is negative;
a third judging unit, configured to further judge whether the terminal has the priority attribute when the second judging unit judges that the terminal has the priority attribute, and allow the terminal to access when the terminal has the priority attribute, otherwise, deny the terminal to access;
wherein the first threshold is less than the second threshold.
Optionally, the access determining module 32 may further include:
and the fourth judging unit is used for judging whether the service corresponding to the service identifier needs to operate in the 5G network when the current slice utilization rate is greater than or equal to a second threshold value, and allowing the terminal to access when the service corresponding to the service identifier needs to operate in the 5G network, otherwise, rejecting the terminal to access.
Optionally, the third determining unit is specifically configured to, when the determination result of the second determining unit is yes, further determine whether the service corresponding to the service identifier is a high-priority service, if so, the terminal has a priority attribute, otherwise, further determine whether the user corresponding to the terminal identifier is a priority user; if so, the terminal has the priority attribute, otherwise, the terminal does not have the priority attribute, and the terminal is allowed to access when the terminal has the priority attribute, otherwise, the terminal is refused to access.
Optionally, the source base station 20 may further include:
the priority user judging module is used for judging whether the user corresponding to the terminal identifier is a priority user;
optionally, the first sending module 23 specifically includes:
a first instruction sending unit, configured to send, if a user corresponding to the terminal identifier is a priority user, a switching instruction carrying a priority access instruction and a terminal identifier to the 4G/3G base station by the source base station 20, so that the 4G/3G base station reserves a resource for the terminal corresponding to the terminal identifier after receiving the priority access instruction;
and a second instruction sending unit, configured to send, if the user corresponding to the terminal identifier is not the priority user, the source base station 20 to the 4G/3G base station, the handover instruction carrying the terminal identifier.
In the terminal switching system provided by the embodiment of the invention, after receiving a network switching request sent by a terminal, a source base station forwards the network switching request to a target base station, the target base station judges whether the terminal is allowed to access according to the current slice use condition, and sends an access rejection instruction to the source base station if the judgment result is negative, the source base station obtains a 4G/3G base station meeting a switching condition after receiving the access rejection instruction, sends the access request to the 4G/3G base station, and sends the switching instruction to the terminal when the 4G/3G base station allows the terminal to access, so that the terminal is switched to the 4G/3G base station. Therefore, the problem that network switching fails due to insufficient network resources of a terminal when network switching is carried out can be solved, the terminal is switched to a 4G/3G network through a switching instruction sent by a source base station, the current service of the terminal can be guaranteed not to be interrupted, user experience is improved, and the problems that the network switching fails due to the fact that the network building scale is limited at the initial stage of existing 5G network deployment, the number of base stations and network equipment is small, and the network switching fails due to insufficient network resources when the terminal carries out network switching, and user experience is influenced are solved.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. A terminal switching method is characterized by comprising the following steps:
a source base station forwards a network switching request to a target base station according to the network switching request sent by a terminal, wherein the source base station and the target base station are 5G base stations;
the target base station judges whether the terminal is allowed to access or not according to the current slice using condition after receiving the network switching request, and sends an access refusing instruction to a source base station when the judging result is negative;
and the source base station acquires the 4G/3G base station meeting the switching condition after receiving the access rejection instruction, sends an access request to the 4G/3G base station, and sends a switching instruction to the terminal when the 4G/3G base station allows the terminal to access, wherein the switching instruction carries a 4G/3G base station identifier so that the terminal is switched to the 4G/3G base station.
2. The terminal handover method according to claim 1, wherein before the source base station forwards the network handover request to the target base station according to the network handover request sent by the terminal, the method further comprises:
the source base station receives a network switching request sent by the terminal, wherein the network switching request comprises a terminal identifier, a slice identifier and a service identifier;
and the source base station determines the target base station meeting the conditions according to the current position information of the terminal and the slice identifier.
3. The method of claim 2, wherein the target base station determines whether to allow the terminal to access according to a current slice usage condition, and specifically includes:
the target base station acquires the current slice utilization rate meeting the slice identifier;
the target base station judges whether the current slice utilization rate is smaller than a first threshold value, and if so, the terminal is allowed to access;
if not, the target base station further judges whether the current slice utilization rate is smaller than a second threshold value, and if the judgment result is yes, the target base station further judges whether the terminal has a priority attribute;
if the terminal has the priority attribute, allowing the terminal to access, otherwise, refusing the terminal to access;
wherein the first threshold is less than the second threshold.
4. The method of claim 3, wherein if the current slice usage rate is greater than or equal to the second threshold, the method further comprises:
and the target base station judges whether the service corresponding to the service identifier needs to operate in a 5G network or not, allows the terminal to access when the service corresponding to the service identifier needs to operate in the 5G network, and refuses the terminal to access if the service corresponding to the service identifier needs to operate in the 5G network.
5. The method of claim 3, wherein the determining, by the target base station, whether the terminal has the priority attribute specifically comprises:
the target base station judges whether the service corresponding to the service identifier is a high-priority service, if so, the terminal has a priority attribute, otherwise, the target base station further judges whether the user corresponding to the terminal identifier is a priority user;
and if the user corresponding to the terminal identification is a priority user, the terminal has a priority attribute, otherwise, the terminal does not have the priority attribute.
6. The terminal handover method according to claim 5, wherein before the source base station sends the access request to the 4G/3G base station, the method further comprises:
the source base station judges whether the user corresponding to the terminal identification is a priority user;
the sending, by the source base station, an access request to the 4G/3G base station specifically includes:
if the user corresponding to the terminal identifier is a priority user, the source base station sends a switching instruction carrying a priority access instruction and the terminal identifier to the 4G/3G base station, so that the 4G/3G base station reserves resources for the terminal corresponding to the terminal identifier after receiving the priority access instruction;
and if the user corresponding to the terminal identifier is not a priority user, the source base station sends a switching instruction carrying the terminal identifier to the 4G/3G base station.
7. A terminal switching system is characterized by comprising a source base station and a target base station, wherein the source base station and the target base station are 5G base stations, and the source base station comprises a request forwarding module, a receiving and acquiring module, a first sending module and a second sending module;
the request forwarding module is used for forwarding the network switching request to the target base station according to the network switching request sent by the terminal;
the receiving and acquiring module is used for acquiring the 4G/3G base station meeting the switching condition after receiving the access rejection instruction sent by the target base station;
the first sending module is connected with the receiving and acquiring module and used for sending an access request to the 4G/3G base station;
the second sending module is connected to the first sending module, and is configured to send a handover instruction to the terminal when the 4G/3G base station allows the terminal to access, where the handover instruction carries an identifier of the 4G/3G base station, so that the terminal is handed over to the 4G/3G base station;
the target base station comprises a request receiving module, an access judging module and an instruction sending module;
the request receiving module is connected with the request forwarding module and is used for receiving the network switching request forwarded by the request forwarding module;
the access judging module is connected with the request receiving module and used for judging whether the terminal is allowed to be accessed according to the current slice using condition;
the instruction sending module is connected with the access judging module and used for sending an access refusing instruction to the receiving and acquiring module when the judging result of the access judging module is negative.
8. The terminal switching system according to claim 7, wherein the source base station further comprises a first receiving module and a target base station determining module;
the first receiving module is configured to receive a network switching request sent by the terminal, where the network switching request includes a terminal identifier, a slice identifier, and a service identifier;
and the target base station determining module is used for determining the target base station meeting the conditions according to the current position information of the terminal and the slice identifier.
9. The terminal switching system according to claim 8, wherein the access determination module comprises:
a first obtaining unit, configured to obtain a current slice utilization rate that satisfies the slice identifier;
the first judging unit is used for judging whether the current slice utilization rate is smaller than a first threshold value or not and allowing the terminal to access when the judging result is yes;
a second judging unit, configured to further judge whether the current slice usage rate is smaller than a second threshold when the first judging unit judges that the result is negative;
a third determining unit, configured to further determine whether the terminal has a priority attribute when the determination result of the second determining unit is yes, and allow the terminal to access when the terminal has the priority attribute, otherwise, deny the terminal to access;
wherein the first threshold is less than the second threshold.
10. The terminal switching system according to claim 9, wherein the access determining module further comprises:
a fourth determining unit, configured to determine whether the service corresponding to the service identifier must operate in a 5G network when the current slice usage rate is greater than or equal to the second threshold, and allow the terminal to access when the service corresponding to the service identifier must operate in the 5G network, otherwise, deny the terminal to access.
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