CN110708734B - Switching method, network equipment, terminal and switching system - Google Patents
Switching method, network equipment, terminal and switching system Download PDFInfo
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- CN110708734B CN110708734B CN201910967035.5A CN201910967035A CN110708734B CN 110708734 B CN110708734 B CN 110708734B CN 201910967035 A CN201910967035 A CN 201910967035A CN 110708734 B CN110708734 B CN 110708734B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W36/08—Reselecting an access point
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- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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Abstract
The present disclosure provides a handover method, applied to a network side, including: the source base station acquires a historical service characteristic label according to a switching request sent by a terminal, and sends the switching request and the historical service characteristic label to a policy server, wherein the switching request comprises a user identifier and a current service type; the strategy server analyzes the current service type and the historical service characteristic label, determines a target base station meeting the switching condition and a corresponding slice identifier, and sends the target base station and the corresponding slice identifier to the source base station; and the source base station sends a switching instruction to the terminal according to the identification of the target base station and the corresponding slice identification. Correspondingly, a network device, a terminal and a switching system are also disclosed. The method is used for solving the problem of unbalanced slice distribution of the 5G network in the prior art, ensuring that the terminal can be timely switched to a proper target base station and a proper target slice, and avoiding frequent switching, thereby improving the service experience of a user.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a handover method, a network device, a terminal, and a handover system.
Background
Compared with the 4G network, the 5G network can bring high speed and low time delay for us, and can also bear more applications and massive connections, and all of the applications and massive connections are realized by means of 5G network slices. The so-called 5G slice essentially divides a physical network which exists in reality into a plurality of virtual networks of different types on a logic level, and divides the virtual networks according to service requirements of different users, such as indexes of time delay, bandwidth size, reliability strength and the like, so as to cope with complex and variable application scenarios.
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. Generating a corresponding slice identifier for a slice in a process of establishing the slice, managing and configuring a Virtualization layer, an SDN (Software Defined Network) controller, hardware resources and an NFV (Network Function Virtualization) management and arrangement module by analyzing a third party requirement, updating module configuration information, and maintaining an operation environment of the SDN controller. The core network sends the slice identifier to the terminal, and then the terminal correctly accesses the network element of the access network by identifying the slice identifier, thereby establishing communication connection with the operator. In actual deployment, dedicated slices need to be created for services with different requirements, a 5G network architecture can have multiple virtual slices in the same base station, and network slice types can be finely divided according to actual situations, for example, in a 5G network environment shown in fig. 1, the base station includes three slices, which are a first slice, a second slice, and a third slice, respectively, where there are three intelligent terminals in a coverage area of the base station, and when three intelligent terminals are respectively performing three different service types, and the three different service types respectively correspond to the three slices, the three intelligent terminals respectively access one slice. Therefore, resource allocation between slices becomes important.
The 5G network is divided into a plurality of different virtual network slices, services are provided for users through different slices, the users are influenced by the positions, the signal quality, the service types and other factors when moving, a proper base station is often required to be reselected for switching, meanwhile, the slices are required to be allocated for the users again by the network, although the 5G network can bring better user rate and service experience, the conditions of large network resource occupation, unbalanced slice allocation, switching failure and the like often occur in the actual use process, and the service experience feeling of the users is influenced.
Disclosure of Invention
The technical problem to be solved by the present disclosure is to provide a switching method, a network device, a terminal, and a switching system for solving the problem of unbalanced slice allocation of a 5G network in the prior art, and ensuring that the terminal can switch to a suitable target base station and a suitable target slice in time, thereby improving the service experience of a user.
In order to solve the foregoing technical problem, in a first aspect, an embodiment of the present disclosure provides a handover method, applied to a network side, including:
a source base station acquires a historical service characteristic label according to a switching request sent by a terminal, and sends the switching request and the historical service characteristic label to a policy server, wherein the switching request comprises a user identifier and a current service type; the strategy server analyzes the current service type and the historical service characteristic label, determines a target base station meeting the switching condition and a corresponding slice identifier, and sends the target base station and the corresponding slice identifier to the source base station; and the source base station sends a switching instruction to the terminal according to the identification of the target base station and the corresponding slice identification.
Preferably, the determining the target base station and the corresponding slice identifier that satisfy the handover condition and sending them to the source base station specifically includes:
the strategy server sorts the target base stations meeting the switching conditions according to priority and sends access requests to the target base stations in sequence, wherein the access requests comprise switching requests and requests for acquiring accessed slice identifiers; and the policy server sequentially judges whether the target base station allows the terminal to access or not, and sends the target base station identifier which allows the terminal to access and is ranked at the forefront and the corresponding slice identifier to the source base station according to the judgment result.
Preferably, the obtaining, by the source base station, the historical service feature tag according to the handover request sent by the terminal specifically includes:
a source base station sends a request for acquiring a historical service characteristic label to a database, wherein the request for acquiring the historical service characteristic label comprises a user identifier; and the database inquires the historical service characteristic label of the user according to the user identification and sends the historical service characteristic label to the source base station.
In a second aspect, an embodiment of the present disclosure provides a handover method, applied to a terminal, including:
when the current signal intensity is smaller than a preset threshold value, sending a switching request to a source base station; receiving a switching instruction sent by a source base station, wherein the switching instruction comprises a target base station identifier and a corresponding slice identifier, and switching to be connected with the target base station according to the switching instruction.
In a third aspect, an embodiment of the present disclosure provides a handover method, including:
when the current signal intensity is smaller than a preset threshold value, the terminal sends a switching request to the source base station; a source base station acquires a historical service characteristic label according to a switching request sent by a terminal, and sends the switching request and the historical service characteristic label to a policy server, wherein the switching request comprises a user identifier and a current service type; the strategy server analyzes the current service type and the historical service characteristic label, determines a target base station meeting the switching condition and a corresponding slice identifier, and sends the target base station and the corresponding slice identifier to the source base station; the source base station sends a switching instruction to the terminal according to the identification of the target base station and the corresponding slice identification; and the terminal receives a switching instruction sent by the source base station and switches to be connected with the target base station according to the switching instruction.
In a fourth aspect, an embodiment of the present disclosure provides a network device, including a source base station and a policy server, where the source base station includes a first transceiver module and an obtaining module, the policy server includes a second transceiver module and an analyzing module, and the first transceiver module is configured to receive a handover request sent by a terminal; the acquisition module is connected with the first transceiver module and used for acquiring the historical service characteristic label according to the switching request; the first transceiver module is also used for sending the switching request and the historical service characteristic label to the second transceiver module, wherein the switching request comprises a user identifier and a current service type; the second transceiver module is used for receiving the switching request and the historical service characteristic label sent by the first transceiver module; the analysis module is connected with the second transceiver module and is used for analyzing the current service type and the historical service characteristic label sent by the first transceiver module so as to determine the target base station meeting the switching condition and the corresponding slice identifier; the second transceiver module is also used for sending the target base station identifier and the corresponding slice identifier to the first transceiver module; and the first transceiver module is also used for receiving the target base station identifier and the corresponding slice identifier sent by the second transceiver module, and sending a switching instruction to the terminal according to the target base station identifier and the corresponding slice identifier.
Preferably, the acquiring module includes a first transmitting unit and a first receiving unit: a first sending unit, configured to send a request for obtaining a historical service feature tag to a database according to a handover request sent by a terminal, where the request for obtaining the historical service feature tag includes a user identifier; and the first receiving unit is used for receiving the historical business characteristic label of the user inquired by the database according to the user identification.
In a fifth aspect, an embodiment of the present disclosure provides a terminal, including a third transceiver module and a handover module, where the third transceiver module is configured to send a handover request to a source base station when a current signal strength is smaller than a preset threshold; and the switching module is connected with the third transceiver module and used for switching to be connected with the target base station according to the switching instruction.
In a sixth aspect, an embodiment of the present disclosure provides a handover system, including a terminal and a network device, where the network device includes a source base station and a policy server, and the terminal is configured to send a handover request to the source base station of the network device when a current signal strength is smaller than a preset threshold; the source base station is used for acquiring a historical service characteristic label according to a switching request sent by a terminal and sending the switching request and the historical service characteristic label to a policy server, wherein the switching request comprises a user identifier and a current service type; the strategy server is used for analyzing the current service type and the historical service characteristic label, determining a target base station meeting the switching condition and a corresponding slice identifier, and sending the target base station and the corresponding slice identifier to the source base station; the source base station is also used for sending a switching instruction to the terminal according to the identification of the target base station and the corresponding slice identification; and the terminal is also used for receiving the switching instruction sent by the source base station and switching to be connected with the target base station according to the switching instruction.
In a seventh aspect, an embodiment of the present disclosure provides a network device, including a memory and a processor, where the memory stores computer instructions executable on the processor, and the processor executes the computer instructions to perform the method applied to network side handover in the first aspect.
The beneficial technical effects of the embodiment of the disclosure are as follows:
in the technical scheme of the switching method, the network device, the terminal and the switching system provided by the embodiment of the disclosure, the terminal sends a switching request to a source base station according to the condition that the current signal intensity of the terminal is smaller than a preset threshold value, the source base station acquires a historical service characteristic label according to the switching request sent by the terminal and sends the switching request and the historical service characteristic label to a policy server, wherein the switching request comprises a user identifier and a current service type; the strategy server analyzes the current service type and the historical service characteristic label, determines a target base station meeting the switching condition and a corresponding slice identifier, and sends the target base station and the corresponding slice identifier to the source base station; the source base station sends a switching instruction to the terminal according to the identification of the target base station and the corresponding slice identification; the terminal is switched to be connected with the target base station according to the switching instruction, the problem of unbalanced slice distribution of a 5G network in the prior art can be solved, the current service type of the user and the historical service characteristic label of the user are comprehensively analyzed, the appropriate target base station and the target slice supporting the service of the target base station are selected for the user terminal, and therefore the service experience of the user is improved.
Drawings
FIG. 1: 5G network environment schematic diagram;
FIG. 2: a flow chart of a handover method of embodiment 1 of the present disclosure;
FIG. 3: a flow chart of a handover method of embodiment 2 of the present disclosure;
FIG. 4 is a schematic view of: a flow chart of a handover method of embodiment 3 of the present disclosure;
FIG. 5 is a schematic view of: a schematic structural diagram of a network device according to embodiment 4 of the present disclosure;
FIG. 6: a schematic structural diagram of a terminal according to embodiment 5 of the present disclosure;
FIG. 7: a schematic structural diagram of a network device according to embodiment 7 of the present disclosure;
FIG. 8: a handover method flowchart of embodiment 8 of the present disclosure.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present disclosure, the following describes the handover method, the network device, the terminal and the handover system of the present disclosure in further detail with reference to the drawings and the embodiments.
Example 1:
as shown in fig. 2, this embodiment provides a switching method, which is a switching method specifically applied to a network side when a terminal needs to be switched, where the terminal may be a smart phone, a tablet computer, an unmanned vehicle, an intelligent wearable device, and the network side includes a base station, a database, a policy server, and other devices. The base station has the following functions: the method can realize the resource allocation and isolation of the slice level and the processing of the flow in the slice; the selection of the function of the core network in the slice can be supported; and processing to support slice availability. The switching method comprises the following steps:
In this embodiment, when the current signal strength of the terminal is lower than the preset threshold, the terminal sends a handover request to a source base station, where the source base station refers to a base station where the terminal is currently located, and the handover request includes a user identifier and a current service type, for example, the user identifier is an IMSI (International Mobile Subscriber Identity). The current service type refers to a service type currently being processed by the user, for example, the terminal in this embodiment is a smart phone, and the current service type of the user of the smart phone may be a voice service, a video service, a game service, and the like. When the slice division of the 5G network is more detailed, the switching request includes the information of the current service type, so that the slice meeting the service type can be quickly matched and selected according to the current service type of the user. The historical service characteristic label comprises a user label generated according to the behavior characteristic habits and the historical data of the user.
Specifically, the obtaining, by the source base station, the historical service feature tag according to the handover request sent by the terminal includes: the source base station sends a request for acquiring the historical service characteristic label to a database, wherein the request comprises a user identifier, and the database inquires the historical service characteristic label of the user according to the user identifier and sends the historical service characteristic label to the source base station.
In this embodiment, the source base station sends a request for acquiring a historical service feature tag of a user to a database of the core network device, where the request carries user identifier IMSI information, and the database may query the historical service feature tag corresponding to the IMSI according to the IMSI information, where the historical service feature tag includes a user tag generated according to behavior feature habits and historical data of the user, and sends the queried historical service feature tag to the source base station. It should be noted that the database of the core network device stores a user tag generated according to the behavior feature habits and historical data of the user, and the purpose of storing the user tag is to deduce the potential service requirements of the user according to the user tag by summarizing the features of the user, so that the related service promotion can be performed in combination with the data of the user when the service is developed. For example, if the historical service feature tag of a certain user is a game fan, the database judges that the user is a game fan according to the fact that the time length of the user playing the game by using the terminal at a fixed time period every day is longer, or judges that the user is a game fan according to the fact that the time length of the user playing the game by using the terminal in a first time length exceeds a preset second time length, the generated user tag is a game fan, the historical service feature tag can be used for deducing the service requirement of the user which may be played, and therefore the strategy server can conveniently analyze the base station and the slice.
In this embodiment, a policy server of a core network device receives a handover request and a historical service feature tag sent by a source base station, performs comprehensive analysis on a current service type in the handover request and the historical service feature tag, queries a base station at a location where a terminal is located, and determines a target base station that can satisfy a handover condition. The handover request further includes current location information of the terminal, and generally speaking, the coverage area where one or more base stations exist includes the location of the terminal.
The specific analysis method for performing the comprehensive analysis by the policy server may be to find out a target base station that can simultaneously satisfy the current service type and the historical service feature tag, regard the target base station as an optimal target base station, and send the optimal target base station to the source base station. For example, on the premise that the current service type of the terminal is voice service, the historical service feature tag of the terminal is game fan, and the base station inquired by the policy server should meet the signal quality of the terminal, the current service requirement of the user (the current service type is voice service) can be met at the same time, so that a target base station list meeting the switching condition is obtained, then the historical service feature tag (the tag is game fan) is judged, whether other slices of the target base station in the list meet the historical service feature tag is analyzed, if the first slice of a certain target base station can meet the voice service and the second slice can meet the game service, the base station is determined to be the optimal target base station, and the optimal target base station identifier and the slice identifier meeting the current service type are sent to the source base station. Of course, the method of performing the comprehensive analysis is not limited to the method in the above example.
Optionally, the policy server sorts the target base stations meeting the switching condition according to priority, and sends access requests to the target base stations in sequence, wherein the access requests include switching requests and requests for acquiring accessed slice identifiers; and the policy server sequentially judges whether the target base station allows the terminal to access or not, and sends the target base station identifier which allows the terminal to access and is ranked at the forefront and the corresponding slice identifier to the source base station according to the judgment result.
In this embodiment, the policy server sorts the target base stations that satisfy the handover condition according to priority, and the specific sorting rule is not limited to the following example, for example, when the first target base station is queried in the target base station list to satisfy the current service requirement and the historical service feature tag requirement of the user, and the second target base station only satisfies the current service requirement of the user, the priority of the base stations may be sorted according to the number of the satisfied service requirements; when two base stations in the target base station list are inquired to meet the current service requirement and the historical service characteristic label requirement of a user, the priority of the base stations can be ranked according to the signal intensity; when two base stations in the target base station list are inquired to meet the current service requirement of a user and the requirement of a historical service characteristic label, and the signal strength is the same, the priority ranking of the base stations can be carried out according to the quality of the slicing instruction. And the policy server sequentially sends access requests to the base stations in the target base station list, wherein the access requests comprise switching requests and requests for acquiring accessed slice identifiers. For example, a first target base station and a second target base station are arranged in sequence in a target base station list, a policy server first sends an access request to the first target base station, the first target base station judges according to the request and slice information corresponding to the first target base station itself to determine whether to allow a terminal to access, if the terminal is allowed to access, the policy server sends confirmation information and a slice identifier supporting the current service type to the policy server, and if the policy server judges that the first target base station allows the terminal to access, the policy server sends an identifier of the first target base station and a slice identifier supporting the current service type to a source base station. If the strategy server receives the non-allowed terminal access information sent by the first target base station, judging that the first target base station refuses to access the terminal, and sending a switching request to the second target base station; and if the confirmation information sent by the second target base station and the slice identifier supporting the current service type are received, the strategy server judges that the second target base station allows the terminal to access, and then sends the identifier of the second target base station and the slice identifier supporting the current service type to the source base station. Compared with the scheme that only one target base station is obtained after analysis by the policy server, the policy server obtains the target base station list through analysis in the embodiment, the base station slices in the list all meet the current service requirements of the user, the switching success rate can be better ensured, priority sequencing is performed on the base stations in the list, and the terminal can be ensured to be switched to the appropriate target base station and target slices, so that the problem that the terminal needs frequent switching when service is changed is avoided, and finally, the experience of the user is improved.
And 103, the source base station sends a switching instruction to the terminal according to the identifier of the target base station and the corresponding slice identifier, so that the terminal establishes connection with the target base station according to the identifier of the target base station and the corresponding slice identifier in the switching instruction.
In the handover method of the embodiment, the terminal sends a handover request to the source base station according to the condition that the current signal strength of the terminal is smaller than the preset threshold, the source base station obtains a historical service feature tag according to the handover request sent by the terminal, and sends the handover request and the historical service feature tag to the policy server, wherein the handover request comprises a user identifier and a current service type; the strategy server analyzes the current service type and the historical service characteristic label and determines a target base station and a corresponding slice identifier which meet the switching condition, the first slice of the target base station determined by analysis should meet the current service requirement to ensure successful switching, so that the current service of the terminal is not interrupted, the second slice of the target base station should meet the service requirement corresponding to the historical service characteristic label, so that the terminal can be switched to the proper target base station and target slice, the terminal is prevented from switching again when the terminal carries out the service corresponding to the historical service characteristic label, and the strategy server sends the target base station identifier and the slice identifier which meet the current service type to the source base station; the source base station sends a switching instruction to the terminal according to the identification of the target base station and the corresponding slice identification; and the terminal is switched to be connected with the target base station according to the switching instruction. The method is used for solving the problem of unbalanced slice distribution of the 5G network in the prior art, and comprehensively analyzing the current service type of the user and the historical service feature label of the user, so that a proper target base station and a target slice supporting the service of the target base station are selected for the user terminal, frequent switching is avoided, and the service experience of the user is improved.
Example 2:
as shown in fig. 3, the present embodiment provides a handover method, applied to a terminal, including:
In this embodiment, a preset threshold is set at the terminal side, and the preset threshold is a parameter, and the parameter setting can be performed according to the requirements of the terminal or the network side. And when the terminal detects that the current signal intensity is smaller than the preset threshold value, sending a switching request to the source base station.
Example 3:
as shown in fig. 4, this embodiment provides a handover method, which is applied to a handover system, where the system includes a terminal, a source base station, a target base station, a policy server, and the like, and the method includes:
And step 304, the source base station sends a switching instruction to the terminal according to the identification of the target base station and the corresponding slice identification.
And 305, the terminal receives a switching instruction sent by the source base station and switches to be connected with the target base station according to the switching instruction.
Example 4:
as shown in fig. 5, the present embodiment provides a network device, which includes a source base station 1 and a policy server 2, where the source base station 1 includes a first transceiver module 11 and an obtaining module 12, and the policy server 2 includes a second transceiver module 21 and an analysis module 22.
The first transceiver module 11 is configured to receive a handover request sent by a terminal.
And the obtaining module 12 is connected to the first transceiving module 11, and is configured to obtain the historical service feature tag according to the handover request.
The obtaining module 12 includes a first sending unit and a first receiving unit, where the first sending unit is configured to send a request for obtaining a historical service feature tag to a database according to a handover request sent by a terminal, where the request for obtaining the historical service feature tag includes a user identifier. And the first receiving unit is used for receiving the historical service characteristic label of the user inquired by the database according to the user identification.
The first transceiver module 11 is further configured to send a handover request and a historical service feature tag to the second transceiver module 21, where the handover request includes a user identifier and a current service type.
And the second transceiving module 21 is configured to receive the handover request and the historical service feature tag sent by the first transceiving module 11.
And the analysis module 22 is connected to the second transceiver module 21, and is configured to analyze the current service type and the historical service feature tag sent by the first transceiver module 11, so as to determine a target base station and a corresponding slice identifier that meet the handover condition.
The analysis module 22 includes an analysis unit and a determination unit, where the analysis unit is configured to analyze the current service type and the historical service feature tag, obtain a target base station that meets the handover condition, sort the target base stations that meet the handover condition according to priority, and send access requests to the target base stations in sequence, where the access requests include a handover request and a request for obtaining an accessed slice identifier. And a judging unit, connected to the analyzing unit, for sequentially judging whether the target base station allows the terminal to access, and sending the target base station identifier and the corresponding slice identifier, which are sorted at the top and allow the terminal to access as a judgment result, to the second transceiver module 21.
The second transceiver module 21 is further configured to send the target base station identifier and the corresponding slice identifier to the first transceiver module 11.
The first transceiver module 11 is further configured to receive the target base station identifier and the corresponding slice identifier sent by the second transceiver module 21, and send a switching instruction to the terminal according to the target base station identifier and the corresponding slice identifier.
Example 5:
as shown in fig. 6, the present embodiment provides a terminal, which includes a third transceiver module 31 and a switching module 32.
The third transceiver module 31 is configured to send a handover request to the source base station when the current signal strength is smaller than a preset threshold. And the switching instruction is used for receiving the switching instruction sent by the source base station, and the switching instruction comprises the target base station identification and the corresponding slice identification.
And a switching module 32 connected to the third transceiver module 31, for switching to connect to the target base station according to the switching instruction.
Example 6:
the embodiment provides a handover system, which comprises a terminal and a network device, wherein the network device comprises a source base station and a policy server.
And the terminal is used for sending a switching request to a source base station of the network equipment when the current signal strength is smaller than a preset threshold value.
And the source base station is used for acquiring a historical service characteristic label according to the switching request sent by the terminal and sending the switching request and the historical service characteristic label to the policy server, wherein the switching request comprises a user identifier and a current service type.
And the strategy server is used for analyzing the current service type and the historical service characteristic label, determining a target base station meeting the switching condition and a corresponding slice identifier, and sending the target base station and the corresponding slice identifier to the source base station.
And the source base station is also used for sending a switching instruction to the terminal according to the identification of the target base station and the corresponding slice identification.
And the terminal is also used for receiving the switching instruction sent by the source base station and switching to be connected with the target base station according to the switching instruction.
Example 7:
as shown in fig. 7, the present embodiment provides a network device, which includes a memory 41 and a processor 42, where the memory 41 stores computer instructions that can be executed on the processor 42, and the processor 42 executes the computer instructions to execute the handover method in embodiment 1.
The memory 41 is connected to the processor 42, the memory 41 may be a flash memory, a read-only memory or other memories, and the processor 42 may be a central processing unit or a single chip microcomputer.
Example 8:
as shown in fig. 8, this embodiment provides a handover method, which is applied to handover of a mobile subscriber between different base stations in a 5G network, and the method includes the following steps:
s1, determining whether the current network quality of the terminal needs to be switched, that is, setting a preset threshold value on the terminal side, and sending a switching request to the base station (i.e., the first base station) when the signal strength of the location of the terminal is lower than the preset threshold value.
And S2, the terminal sends a switching request to the first base station of the network side, wherein the switching request carries the state data of the current terminal, such as the position information, the current service type, the current signal strength, the user identification and the like.
And S3, the first base station sends a request for obtaining user QoS data to the core network, the request comprises a user identifier, the core network can inquire the user QoS data corresponding to the user identifier according to the user identifier, and returns the inquiry result to the first base station. The purpose of the first base station obtaining the user Qos data is to facilitate the policy server to perform slice selection on the premise of ensuring that the user subscription data (Qos) is preferentially met when performing terminal slice analysis and selection.
And S4, the first base station sends a request for acquiring the historical service characteristic label of the user to the database, wherein the request comprises the user identification.
And S5, the database can inquire the historical service characteristic label corresponding to the user identification according to the user identification and return the historical service characteristic label of the user to the first base station.
S6, the first base station sends the handover request and the obtained data (the user Qos data and the historical service feature tag) to the policy server.
And S7, the strategy server analyzes the received request and data and searches a target base station meeting the requirement. Specifically, the policy server performs comprehensive analysis according to the user Qos data, the current service type in the handover request, and the historical service feature tag, and queries a target base station that satisfies the handover condition for the terminal.
S8, the policy server sends an access request and a request for obtaining the accessed slice identifier to the optimal target base station (i.e. the second base station) that satisfies the handover condition according to the priority order.
And S9, the second base station judges according to the request and the slice information corresponding to the second base station, confirms whether the terminal is allowed to access, if the terminal is allowed to access, the second base station returns confirmation information and the corresponding access slice information to the policy server, and if the terminal is refused to access or the corresponding slice requirement cannot be met, the second base station returns the access disallowed information to the policy server.
And S10, when the policy server receives the access disallowance information sent by the second base station, selecting a third base station to send an access request and a request for acquiring the accessed slice identifier according to the priority order.
And S11, the third base station confirms the request, and if the access is allowed, the third base station returns confirmation information and corresponding access slice information to the policy server.
S12, the policy server sends a handover command to the first base station, where the handover command includes the third base station identifier and the corresponding slice identifier.
And S13, the first base station sends the switching instruction to the terminal and instructs the terminal to switch.
And S14, the terminal is switched to the third base station, thereby establishing connection with the third base station.
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 method for switching is applied to a network side, and is characterized by comprising the following steps:
a source base station acquires a historical service characteristic label according to a switching request sent by a terminal, and sends the switching request and the historical service characteristic label to a policy server, wherein the switching request comprises a user identifier and a current service type;
the strategy server analyzes the current service type and the historical service characteristic label, determines a target base station meeting the switching condition and a corresponding slice identifier, and sends the target base station and the corresponding slice identifier to the source base station;
the source base station sends a switching instruction to the terminal according to the identification of the target base station and the corresponding slice identification,
the policy server analyzes the current service type and the historical service feature tag, and specifically comprises the following steps:
and the strategy server finds out a target base station which can simultaneously meet the current service type and the historical service characteristic label, wherein a first slice of the target base station is required to meet the current service requirement, and a second slice of the target base station is required to meet the service requirement corresponding to the historical service characteristic label, and the target base station is taken as an optimal target base station.
2. The method of claim 1, wherein the determining the target base station and the corresponding slice identifier that satisfy the handover condition and sending them to the source base station specifically comprises:
the strategy server sorts the target base stations meeting the switching conditions according to priority and sends access requests to the target base stations in sequence, wherein the access requests comprise switching requests and requests for acquiring accessed slice identifiers;
and the policy server sequentially judges whether the target base station allows the terminal to access or not, and sends the target base station identifier which allows the terminal to access and is ranked at the forefront and the corresponding slice identifier to the source base station according to the judgment result.
3. The method according to claim 1, wherein the obtaining, by the source base station, the historical service feature tag according to the handover request sent by the terminal specifically includes:
a source base station sends a request for acquiring a historical service characteristic label to a database, wherein the request for acquiring the historical service characteristic label comprises a user identifier;
and the database inquires the historical service characteristic label of the user according to the user identification and sends the historical service characteristic label to the source base station.
4. A method for switching is applied to a terminal, and is characterized by comprising the following steps:
when the current signal intensity is smaller than a preset threshold value, sending a switching request to a source base station so that the source base station can acquire a historical service characteristic label according to the switching request sent by a terminal, and sending the switching request and the historical service characteristic label to a policy server, wherein the switching request comprises a user identifier and a current service type;
the strategy server analyzes the current service type and the historical service characteristic label, determines a target base station meeting the switching condition and a corresponding slice identifier, and sends the target base station and the corresponding slice identifier to the source base station;
receiving a switching instruction sent by a source base station, wherein the switching instruction comprises a target base station identifier and a corresponding slice identifier, switching to be connected with the target base station according to the switching instruction,
the policy server analyzes the current service type and the historical service feature tag, and specifically comprises the following steps:
and the strategy server finds out a target base station which can simultaneously meet the current service type and the historical service characteristic label, wherein a first slice of the target base station is required to meet the current service requirement, and a second slice of the target base station is required to meet the service requirement corresponding to the historical service characteristic label, and the target base station is taken as an optimal target base station.
5. A method of handover, comprising:
when the current signal intensity is smaller than a preset threshold value, the terminal sends a switching request to the source base station;
a source base station acquires a historical service characteristic label according to a switching request sent by a terminal, and sends the switching request and the historical service characteristic label to a policy server, wherein the switching request comprises a user identifier and a current service type;
the strategy server analyzes the current service type and the historical service characteristic label, determines a target base station meeting the switching condition and a corresponding slice identifier, and sends the target base station and the corresponding slice identifier to the source base station;
the source base station sends a switching instruction to the terminal according to the identification of the target base station and the corresponding slice identification;
the terminal receives the switching instruction sent by the source base station and switches to be connected with the target base station according to the switching instruction,
the policy server analyzes the current service type and the historical service feature tag, and specifically comprises the following steps:
and the strategy server finds out a target base station which can simultaneously meet the current service type and the historical service characteristic label, wherein the first slice of the target base station is required to meet the current service requirement, and the second slice of the target base station is required to meet the service requirement corresponding to the historical service characteristic label, and the target base station is taken as the optimal target base station.
6. A network device is characterized by comprising a source base station and a policy server, wherein the source base station comprises a first transceiver module and an acquisition module, the policy server comprises a second transceiver module and an analysis module,
the first transceiver module is used for receiving a switching request sent by a terminal;
the acquisition module is connected with the first transceiver module and used for acquiring the historical service characteristic label according to the switching request;
the first transceiver module is further used for sending the switching request and the historical service feature tag to the second transceiver module, wherein the switching request comprises a user identifier and a current service type;
the second transceiver module is used for receiving the switching request and the historical service characteristic label sent by the first transceiver module;
the analysis module is connected with the second transceiver module and is used for analyzing the current service type and the historical service characteristic label sent by the first transceiver module so as to determine the target base station meeting the switching condition and the corresponding slice identifier;
the second transceiver module is also used for sending the target base station identification and the corresponding slice identification to the first transceiver module;
the first transceiver module is also used for receiving the target base station identification and the corresponding slice identification sent by the second transceiver module and sending a switching instruction to the terminal according to the identification of the target base station and the corresponding slice identification,
and the analysis module is also used for finding out a target base station which can simultaneously meet the current service type and the historical service characteristic label, wherein the first slice of the target base station is required to meet the current service requirement, and the second slice of the target base station is required to meet the service requirement corresponding to the historical service characteristic label and is taken as the optimal target base station.
7. The network device of claim 6, wherein the obtaining module comprises a first sending unit and a first receiving unit:
a first sending unit, configured to send a request for obtaining a historical service feature tag to a database according to a handover request sent by a terminal, where the request for obtaining the historical service feature tag includes a user identifier;
and the first receiving unit is used for receiving the historical service characteristic label of the user inquired by the database according to the user identification.
8. A terminal is characterized in that the terminal comprises a third transceiver module and a switching module,
the third transceiving module is used for sending a switching request to the source base station when the current signal strength is smaller than a preset threshold value, so that the source base station acquires a historical service characteristic label according to the switching request sent by the terminal and sends the switching request and the historical service characteristic label to the policy server, wherein the switching request comprises a user identifier and a current service type;
the strategy server analyzes the current service type and the historical service characteristic label, determines a target base station meeting the switching condition and a corresponding slice identifier, and sends the target base station and the corresponding slice identifier to the source base station;
and a switching instruction for receiving the switching instruction sent by the source base station, wherein the switching instruction comprises the target base station identification and the corresponding slice identification,
a switching module connected with the third transceiver module for switching to connect with the target base station according to the switching instruction,
the policy server analyzes the current service type and the historical service feature tag, and specifically comprises the following steps:
and the strategy server finds out a target base station which can simultaneously meet the current service type and the historical service characteristic label, wherein a first slice of the target base station is required to meet the current service requirement, and a second slice of the target base station is required to meet the service requirement corresponding to the historical service characteristic label, and the target base station is taken as an optimal target base station.
9. A switching system is characterized by comprising a terminal and a network device, wherein the network device comprises a source base station and a policy server,
the terminal is used for sending a switching request to a source base station of the network equipment when the current signal intensity is smaller than a preset threshold value;
the source base station is used for acquiring a historical service characteristic label according to a switching request sent by a terminal and sending the switching request and the historical service characteristic label to a policy server, wherein the switching request comprises a user identifier and a current service type;
the strategy server is used for analyzing the current service type and the historical service characteristic label, determining a target base station meeting the switching condition and a corresponding slice identifier, and sending the target base station and the corresponding slice identifier to the source base station;
the source base station is also used for sending a switching instruction to the terminal according to the identification of the target base station and the corresponding slice identification;
the terminal is also used for receiving the switching instruction sent by the source base station and switching to be connected with the target base station according to the switching instruction,
and the strategy server is also used for finding out a target base station which can simultaneously meet the current service type and the historical service characteristic label, wherein the first slice of the target base station is required to meet the current service requirement, and the second slice of the target base station is required to meet the service requirement corresponding to the historical service characteristic label and is used as the optimal target base station.
10. A network device comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the method of any of claims 1-3.
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