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WO2018188557A1 - Procédé et dispositif de sélection d'une station de base cible et support de stockage - Google Patents

Procédé et dispositif de sélection d'une station de base cible et support de stockage Download PDF

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Publication number
WO2018188557A1
WO2018188557A1 PCT/CN2018/082340 CN2018082340W WO2018188557A1 WO 2018188557 A1 WO2018188557 A1 WO 2018188557A1 CN 2018082340 W CN2018082340 W CN 2018082340W WO 2018188557 A1 WO2018188557 A1 WO 2018188557A1
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WIPO (PCT)
Prior art keywords
network slice
slice instance
base station
target base
information
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PCT/CN2018/082340
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English (en)
Chinese (zh)
Inventor
陈斯
李旭
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/18—Network planning tools
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • 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
    • H04W36/00835—Determination of neighbour cell lists
    • H04W36/008357—Determination of target cell based on access point [AP] properties, e.g. AP service capabilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/13—Cell handover without a predetermined boundary, e.g. virtual cells
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength

Definitions

  • the embodiments of the present application relate to the field of communications, and in particular, to a method, an apparatus, and a storage medium for selecting a target base station.
  • the terminal of the Long Term Evolution adopts the idea of the terminal assisted network control in the process of the handover between the base stations.
  • the source base station sends the measurement control to the terminal, and the terminal measures the signal quality of the neighboring base station, and The signal quality of each neighboring base station is reported.
  • the source base station determines that the signal quality of the neighboring base station is greater than the signal quality of the source base station according to the signal quality of each neighboring base station reported by the terminal, and the source base station determines that the terminal switches from the source base station to the signal quality.
  • Target base station is the idea of the terminal assisted network control in the process of the handover between the base stations.
  • NFV Network Function Virtualization
  • network functions can be built on common hardware without the need for a dedicated hardware platform.
  • NFV Network Function Virtualization
  • a virtual network built for different network business needs is called a network slice instance.
  • Each network function can be optimized and customized according to network service requirements.
  • Network segmentation instances based on NFV technology can be rapidly deployed as needed to quickly meet the needs of different scenarios.
  • a logic-based resource allocation technique that is, a network slice instance, will be adopted, and is no longer limited to a specific physical resource.
  • the terminal still adopts the strategy in LTE when the terminal switches between the source base station and the target base station, that is, the source base station determines the target base station according to the signal quality of the neighboring base station to implement terminal handover, and thus cannot better adapt to the network slice instance.
  • the source base station determines the target base station according to the signal quality of the neighboring base station to implement terminal handover, and thus cannot better adapt to the network slice instance.
  • An embodiment of the present application provides a method, an apparatus, and a storage medium for selecting a target base station, which are used to select a better target base station for a terminal in a network slice instance application scenario.
  • the embodiment of the present application provides a method for selecting a target base station, where the method includes: if the source base station determines that the terminal needs to perform base station handover, the source base station according to the signal quality of the M neighboring base stations, and the network slice of the M neighboring base stations.
  • the information of the instance, and the information of the network slice instance corresponding to the terminal determine the target base station to be handed over by the M neighboring base stations; where M is a positive integer; wherein the information and the terminal of the network slice instance of the M neighboring base stations
  • the information of each network slice instance in the information of the corresponding network slice instance includes: indication information indicating a service type and a service quality level of the network slice instance indicated by the information of the network slice instance.
  • the target base station is selected to take into account the signal of the neighbor base station.
  • the quality of the network slice instance on the neighboring base station is also considered, so that the selected target base station can be better adapted to the network slice instance application scenario. Furthermore, the problem that the selected target base station does not match the information of the network slice instance of the terminal can be avoided.
  • the network slice instance in this embodiment of the present application is a collection of a series of physical and logical resources.
  • the information of the network slice instance of the source base station, the target base station, or the neighboring base station in the embodiment of the present application refers specifically to the information of the network slice instance in the network slice instance included in the base station.
  • the network slice instance runs on the service, and the information of the network slice instance corresponding to the terminal refers to the information of the network slice instance corresponding to the service used by the terminal.
  • the source base station determines, according to the signal quality of the M neighboring base stations, the information of the network slice instance of the M neighboring base stations, and the information of the network slice instance corresponding to the terminal, the target base station to be switched by the terminal from the M neighboring base stations.
  • the method further includes: the source base station receiving information of the network slice instance of the M neighboring base stations in a wired or wireless manner; and broadcasting the information of the network slice instance of the source base station in a wired or wireless manner.
  • the base station preferentially selects the information of the Xn interface to broadcast its own network slice instance, which saves time and effort; if the Xn interface between the base stations is not opened, Then, the base station can broadcast the information of its own network slice instance in the air interface. In this way, the base station can acquire information of the network slice instance of the neighbor base station.
  • the information of the network slice instance of the M neighboring base stations in the embodiment of the present application and the information of each network slice instance in the information of the network slice instance corresponding to the terminal include, but are not limited to, indicating the network slice instance.
  • the information indicating the service type and service quality level of the network slice instance indicated by the information may directly include the service type and the service quality level of the network slice instance.
  • the identifier of the network slice instance may also be included, and the service type and the service quality level may be detected according to the identifier of the network slice instance.
  • N quasi-target base stations in the M neighboring base stations there are N quasi-target base stations in the M neighboring base stations; each of the N quasi-target base stations satisfies the condition: the terminal accesses the quasi-target base station and the access to the current serving base station The performance is better; N is a positive integer not greater than M; the source base station obtains M neighboring base stations according to the signal quality of the M neighboring base stations, the information of the network slice instances of the M neighboring base stations, and the information of the network slice instance corresponding to the terminal.
  • Determining the target base station to be handed over by the terminal including: if there is no quasi-target base station that matches the information of the network slice instance with the information of the network slice instance corresponding to the terminal, then: for each of the N quasi-target base stations Determining, from the information of the network slice instance included in the quasi-target base station, the information of the network slice instance with the highest similarity of the information of the network slice instance corresponding to the terminal, and the information of the network slice instance with the highest similarity corresponding to the terminal The similarity of the information of the network slice instance; determining the terminal needs from the N quasi-target base stations according to the similarity degree of each quasi-target base station a target base station of the handover; wherein the similarity between the information of the network slice instance of the quasi-target base station and the information of the network slice instance corresponding to the terminal is a parameter type of a parameter of the network slice instance included in the information of the two network slice instances The parameter value is determined.
  • the network slice instance with the highest similarity can be selected for reconfiguration.
  • the reconfiguration process of the network slice instance changes.
  • the parameter items are as small as possible, and the range of values of the parameters is also as small as possible, which further speeds up the reconfiguration rate.
  • the target base station to be handed over by the terminal is determined from the N quasi-target base stations, including: among the N quasi-target base stations The quasi-target base station with the highest similarity is determined as the target base station; after determining the target base station to be handed over by the N quasi-target base stations according to the similarity degree of each quasi-target base station, the method further includes: to N quasi-target base stations The medium-similar target base station sends a network slice instance reconfiguration request.
  • the network slice instance reconfiguration request includes information about the network slice instance corresponding to the terminal. If the network slice instance reconfiguration fails, the N target targets are determined.
  • the quasi-target base station other than the quasi-target base station that has sent the network slice instance reconfiguration request in the base station the quasi-target base station with the highest similarity sends the network slice instance reconfiguration request until receiving the network slice instance reconfiguration success response; Re-determining the target base station corresponding to the received network slice instance reconfiguration success response as the target
  • the network slice instance reconfiguration request is used to reconfigure the network slice instance included in the re-configured network slice instance compatible terminal by the quasi-target base station receiving the network slice instance reconfiguration request. Information about the network slice instance.
  • the terminal is determined from the N quasi-target base stations according to the similarity degree of each quasi-target base station.
  • the target base station to be switched includes: to the N quasi-target base stations: the order of similarity from high to low, the network slice instance reconfiguration request is sent by each of the P target base stations of the previous P bits;
  • the network slice instance reconfiguration request includes information about a network slice instance corresponding to the terminal; P is a positive integer not greater than N; and the network slice instance reconfiguration request is used to enable the target base station to receive the network slice instance reconfiguration request Performing a reconfiguration operation on the network slice instance included in the network, so that the reconfigured network slice instance is compatible with the information of the network slice instance corresponding to the terminal; and receiving at least one network slice instance reconfiguration successfully returned by the P target base stations And determining a target base station from the quasi-target base station corresponding to the at least one network slice instance reconfiguration
  • one of the quasi-target base stations receiving the network slice instance reconfiguration success response can be found as the target base station, or in order to improve the reliability, a plurality of target base stations can be found.
  • the target base station is determined from the quasi-target base station corresponding to the at least one network slice instance reconfiguration success response, including: To the network slice instance reconfiguration success response returned by each of the L quasi-target base stations in P, the target retargeting base station with the best service performance after terminal access in the L quasi-target base stations is determined as the target Base station; L is a positive integer not greater than P.
  • another optional solution is: if the network slice instance reconfiguration successfully returned by one of the P target base stations is received, the oldest received network slice instance is reconfigured successfully. Responding to the corresponding quasi-target base station as the target base station, and transmitting a reconfiguration cancel command to the remaining P-1 quasi-target base stations of the P quasi-target base stations; wherein the reconfiguration cancel command is used to make the remaining P-1 quasi The target base station cancels the reconfiguration operation on the network slice instance.
  • each of the N quasi-target base stations satisfies the condition that: the terminal access quasi-target base station has better service performance than the access to the current serving base station; N is a positive integer that is not greater than M.
  • the source base station determines the terminal from the M neighboring base stations according to the signal quality of the M neighboring base stations, the information of the network slice instances of the M neighboring base stations, and the information of the network slice instance corresponding to the terminal.
  • the target base station to be switched includes: if there are K quasi-target base stations that match the information of the network slice instance with the information of the network slice instance corresponding to the terminal, the information of the network slice instance and the information of the network slice instance corresponding to the terminal.
  • the matched K quasi-target base stations are determined as target base stations; wherein K is a positive integer not greater than N.
  • the method further includes: the source base station sending a handover request to the target base station; where the handover request includes information about the network slice instance corresponding to the terminal; and the source base station receives a handover response returned by the target base station, where the handover response includes information of the network slice instance to be accessed by the terminal, where the network slice instance indicated by the information of the network slice instance to be accessed is a network slice instance corresponding to the compatible terminal
  • the information is carried by the network slice instance that is carried by the instance. Therefore, the process of the terminal switching to the target base station is implemented, and the terminal accesses the network slice instance of the network base station instance that can be compatible with the network slice instance corresponding to the terminal in the target base station, and ensures that the terminal service is not interrupted.
  • an embodiment of the present application provides an apparatus for selecting a target base station, where the apparatus for selecting a target base station includes a memory, a transceiver, and a processor, where: the memory is used to store an instruction; the processor is configured to execute an instruction stored in the memory, and The control transceiver performs signal reception and signal transmission.
  • the device selecting the target base station is configured to perform the method of any of the first aspect or the first aspect.
  • the embodiment of the present application provides a device for selecting a target base station, which is used to implement any one of the foregoing first aspect or the first aspect, including a corresponding functional module, which is used to implement the steps in the foregoing method. .
  • the embodiment of the present application provides a computer storage medium, where the computer storage medium stores instructions, when the computer is running on the computer, causing the computer to perform the method in the first aspect or any possible implementation manner of the first aspect. .
  • an embodiment of the present application provides a computer program product comprising instructions, when executed on a computer, causing a computer to perform the method of the first aspect or any possible implementation of the first aspect.
  • the information is based on the signal quality of the M neighboring base stations, the information of the network slice instance of the M neighboring base stations, and the information of the network slice instance corresponding to the terminal.
  • Determining, by the neighboring base station, the target base station to be handed over by the terminal; the information of the network slice instance of the M neighboring base stations and the information of each network slice instance in the information of the network slice instance corresponding to the terminal include: The indication of the service type and service quality level of the network slice instance indicated by the information of the instance.
  • the target base station Since the source base station is a target base station selected according to the signal quality of the M neighboring base stations, the network slice instance of the M neighboring base stations, and the information of the network slice instance corresponding to the terminal, the target base station is selected to take into account the signal of the neighbor base station.
  • the quality of the network slice instance on the neighboring base station is also considered, so that the selected target base station can be better adapted to the network slice instance application scenario.
  • FIG. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application.
  • FIG. 2 is a schematic flowchart of a method for selecting a target base station according to an embodiment of the present application
  • 2a is a schematic diagram of information of a network slice instance according to an embodiment of the present disclosure
  • FIG. 2b is a schematic diagram of a network slice instance parameter according to an embodiment of the present application.
  • 2c is a schematic diagram of information about a network slice instance maintained by a base station according to an embodiment of the present disclosure
  • FIG. 2 is a schematic flowchart of a method for selecting a target base station according to an embodiment of the present disclosure
  • FIG. 2e is a schematic flow chart of a method for selecting a target base station based on FIG. 2d;
  • 2f is a schematic flow chart of a method for selecting a target base station based on FIG. 2d;
  • 2G is a schematic flowchart of a method for selecting a target base station and a terminal handover according to an embodiment of the present application
  • 2h is a schematic flowchart of a method for selecting a target base station and a terminal handover according to an embodiment of the present application
  • FIG. 3 is a schematic structural diagram of an apparatus for selecting a target base station according to an embodiment of the present disclosure
  • FIG. 4 is a schematic structural diagram of an apparatus for selecting a target base station according to an embodiment of the present application.
  • FIG. 1 shows a schematic architectural diagram of a communication system to which an embodiment of the present application is applied.
  • the communication system 100 can include a terminal 105 and a plurality of base stations.
  • the base station currently accessed by the terminal 105 is referred to as a source base station 101, and the terminal 105 is currently not accessible but acceptable.
  • the base station to the signal is called a neighbor base station, such as the neighbor base station 102, the neighbor base station 103, and the neighbor base station 104.
  • the terminal 105 and the base station can be connected by wireless connection or other means.
  • the source base station may select a target base station for the terminal from the neighboring base station, so that the terminal switches from the source base station to the target base station, thereby providing various services for the terminal through the target base station.
  • a target base station for the terminal from the neighboring base station, so that the terminal switches from the source base station to the target base station, thereby providing various services for the terminal through the target base station.
  • Any one of the source base station, the neighbor base station, and the target base station in the embodiment of the present application may also be referred to as a cell.
  • a terminal a device that provides voice and/or data connectivity to a user, including a wireless terminal.
  • the wireless terminal can be a handheld device with wireless connectivity, or other processing device connected to a wireless modem, and a mobile terminal that communicates with one or more core networks via a wireless access network.
  • the wireless terminal can be a mobile phone (or "cellular" phone) and a computer with a mobile terminal.
  • the wireless terminal can also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device.
  • the wireless terminal can be part of a mobile station, an access point, or a user equipment (UE).
  • UE user equipment
  • base station includes but is not limited to a node, a station controller, an access point (AP), or any other type of interface device capable of working in a wireless environment.
  • AP access point
  • FIG. 2 is a schematic flowchart showing a method for selecting a target base station according to an embodiment of the present application.
  • a method for selecting a target base station implemented by a base station side includes:
  • Step 201 if the source base station determines that the terminal needs to perform base station handover, step 202 is performed;
  • Step 202 The source base station determines, according to the signal quality of the M neighboring base stations, the information of the network slice instances of the M neighboring base stations, and the information of the network slice instance corresponding to the terminal, the target base stations to be handed over by the M neighboring base stations;
  • the M is a positive integer.
  • the information of the network slice instance of the M neighboring base stations and the information of each network slice instance in the information of the network slice instance corresponding to the terminal include but are not limited to: indicating the network slice instance.
  • the information is based on the signal quality of the M neighboring base stations, the information of the network slice instance of the M neighboring base stations, and the information of the network slice instance corresponding to the terminal.
  • Determining, by the neighboring base station, the target base station to be handed over by the terminal; the information of the network slice instance of the M neighboring base stations and the information of each network slice instance in the information of the network slice instance corresponding to the terminal include: The indication of the service type and service quality level of the network slice instance indicated by the information of the instance.
  • the target base station is selected to take into account the signal of the neighbor base station.
  • the quality of the network slice instance on the neighboring base station is also considered, so that the selected target base station can be better adapted to the network slice instance application scenario. Furthermore, the problem that the selected target base station does not match the information of the network slice instance of the terminal can be avoided.
  • NST Network Slice Template
  • NST Network Slice Instance
  • Network Slice Describes the concept of system behavior implemented through network slice instances. It is a conceptual description of the system behavior implemented by the NSI (English can be expressed as Network Sliceis a concept describing a system behaviour which is implemented via Network Slice Instance(s)). The relationship between the network slice and the network slice instance may be 1:R, and R is a positive integer; that is, there are R different network slice instances under the same type of network slice.
  • a network slice instance is a collection of physical and logical resources.
  • the information of the network slice instance of the source base station, the target base station, or the neighboring base station in the embodiment of the present application refers specifically to the information of the network slice instance in the network slice instance included in the base station.
  • the network slice instance runs on the service, and the information of the network slice instance corresponding to the terminal refers to the information of the network slice instance corresponding to the service used by the terminal.
  • FIG. 2a is a schematic diagram showing information of a network slice instance provided by an embodiment of the present application.
  • the information of the network slice instance includes: a network slice type, a network. Any one of a slice instance identifier (Slice ID), a quality of service class Identifier (QCI), a service type (Service Type), and a slice Instance Parameters (Slice Instance Parameters) or More than one.
  • the information of the network slice instance of the M neighboring base stations in the embodiment of the present application and the information of each network slice instance in the information of the network slice instance corresponding to the terminal include, but are not limited to, indicating the network slice instance.
  • the information indicating the service type and service quality level of the network slice instance indicated by the information may directly include the service type and the service quality level of the network slice instance.
  • the identifier of the network slice instance may also be included, and the service type and the service quality level may be detected according to the identifier of the network slice instance.
  • Network slice instance Network slice type can include multiple types, such as: Enhanced Mobile Broadband (eMBB), Ultra Reliable & Low Latency Communication (uRLLC), and massive IoT communication (Massive Machine Type Communication, mMTC).
  • eMBB Enhanced Mobile Broadband
  • uRLLC Ultra Reliable & Low Latency Communication
  • mMTC massive IoT communication
  • the network slice type shown in Figure 2a is uRLLC.
  • the ID of the network slice instance used to identify the network slice instance.
  • the identifier of the network slice instance may be a global ID.
  • the network slice instance identified by the identity of the same network slice instance can run on multiple different base stations. For example, the identifier of the network slice instance shown in Figure 2a is 1.
  • Identification of the quality of service level can be binned as needed. For example, the customer's business can be classified according to the needs of the customer or the default service quality level of the slice instance. For example, if the service requires a quality level of 5, the identifier of the service quality level in the information of the network slice instance of the service running the terminal also needs to be level 5. For example, the service quality level of the network slice instance shown in Figure 2a is identified as 5.
  • Service Type A type used to identify the services that the network slice instance can support or run. It is also a global identifier.
  • the service type refers to the type of a service, is a global identifier, and the division of the service type is unique. There may be cases where the service types of the two network slice instances are the same and the service quality levels are different. For example, the service type of the network slice instance shown in Figure 2a is 01 Automatic Drive Type.
  • Parameters of the network slice instance can represent the module name used by each layer of this network slice instance.
  • the Radio Link Control (RLC) layer in the network slice instance may adopt an Unacknowledged Mode (UM) or an Acknowledged Mode (AM) mode.
  • UM Unacknowledged Mode
  • AM Acknowledged Mode
  • the network slice instance parameter of the network slice instance shown in FIG. 2a indicates that the RLC layer adopts UM.
  • FIG. 2b is a schematic diagram showing a network slice instance parameter provided by an embodiment of the present application.
  • three network slice instances are shown, which are respectively a network slice instance 211 and a network slice instance. 212 and network slice instance 213.
  • Each of the network slice instances is shown in Figure 2b in the Packet Data Convergence Protocol (PDCP) layer, the RLC layer, the Medium Access Control (MAC), and the Physical Layer (PHY) layer. parameter.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access Control
  • PHY Physical Layer
  • the network slice instance 211 includes a Robust Header Compression (ROHC), security, and integrity module at the PDCP layer; UM or AM at the RLC layer; and a MAC layer at the RLC layer.
  • Use algorithm 1. Algorithm 1 guarantees throughput (throput); at the PHY layer, the bandwidth is wide, and the Transmission Time Interval (TTI) is 1 millisecond (ms).
  • TTI Transmission Time Interval
  • RBG Resource Block Group
  • the network slice instance 212 includes the ROHC module at the PDCP layer; UM at the RLC layer; algorithm 2 at the MAC layer, algorithm 2 guarantees throughput (throput or unauthorized transmission grant-free); at the PHY layer
  • the bandwidth is narrow, the TTI is 0.5 ms, and the RBG size is normal.
  • the network slice instance 213 includes a ROHC, security, and integrity module at the PDCP layer; UM or AM at the RLC layer; and algorithm 3 at the MAC layer, and algorithm 3 guarantees throughput ( Throuput), delay or grant-free; at the PHY layer, the bandwidth is narrow, the TTI is 1 ms, and the RBG size is small.
  • the bandwidth in the embodiment of the present application is a wide or narrow concept, which is a relative concept, not a fixed value; for example, a specific value, a wide bandwidth of 40 MHz, and a narrow ( Narrow) is a bandwidth of 10MHz.
  • the size of the RBG in the embodiment of the present application is a large, normal, or small, which is a relative concept, not a fixed value; for example, a specific value, the maximum is 24, Normal is 12 and small is 6.
  • two network slice instances with the same identifier of the network slice instance may be deployed on two different base stations.
  • the parameters of the network slice instance included in the network slice instance with the same identifier of the network slice instance may be the same or different.
  • the source base station may determine, according to the signal quality of the M neighboring base stations, the information of the network slice instance of the M neighboring base stations, and the information of the network slice instance corresponding to the terminal, that the terminal needs to be switched from the M neighboring base stations.
  • the method further includes: the source base station receiving information of the network slice instance of the M neighbor base stations by using a wired or wireless manner; and broadcasting the information of the network slice instance of the source base station by using a wired or wireless manner.
  • the base station preferentially selects the information of the Xn interface to broadcast its own network slice instance, which saves time and effort; If the Xn interface is not enabled, the base station can broadcast the information of its own network slice instance. In this way, the base station can acquire information of the network slice instance of the neighbor base station.
  • each base station can maintain a table of information for a network slice instance.
  • FIG. 2 is a schematic diagram showing information of a network slice instance maintained by a base station according to an embodiment of the present application.
  • the first column in the table is a base station identifier, and may be filled in a neighboring base station of the base station.
  • the information of the network slice instance may include the network slice type, the identifier of the network slice instance, the identifier of the service quality level, the service type, and the network slice instance. Any one or more of the parameters.
  • the base station identifier shown in FIG. 2c may also be identified as a cell identifier (cell ID), and the cell identifier (cell ID) is a global ID, in a public land mobile network.
  • PLMN Public Land Mobile Network
  • FIG. 2d is a schematic flowchart showing a method for selecting a target base station according to an embodiment of the present application. As shown in FIG. 2d, the method includes:
  • Step 221 Each of the neighboring base station and the source base station broadcasts information of its own network slice instance; this step may be performed at any step before step 226, and does not have to be placed before step 222. That is to say, in the embodiment of the present application, the broadcast is a "periodic broadcast", and the latest slice information of the current base station is periodically broadcast to the neighboring base station on a time scale, which is not limited to the sequence of steps.
  • the source base station makes a handover decision, only the currently obtained neighbor base station slice information is used as a judgment basis.
  • Step 222 The source base station sends measurement control to the terminal.
  • Step 223 The terminal performs the measurement, and obtains the measurement result.
  • the terminal performs the related measurement according to the measurement configuration message in the measurement control sent by the base station, and reports the measurement result to the base station.
  • the terminal measurement result may include, but is not limited to, the signal quality of the neighboring base station and the source base station, such as Reference Signal Receiving Power (RSRP) and Reference Signal Receiving Quality (RSRQ);
  • RSRP Reference Signal Receiving Power
  • RSRQ Reference Signal Receiving Quality
  • Step 224 The terminal reports the measured measurement result to the source base station.
  • Step 225 the source base station determines whether the terminal needs to perform handover according to the measurement result; if not, the current process is terminated, that is, the terminal continues to remain at the source base station; if necessary, step 226 is performed;
  • Step 226, the source base station performs determining the target base station from the neighboring base stations of the source base station;
  • step 227 the terminal performs a handover procedure to cause the terminal to handover to the target base station.
  • the source base station determines whether to trigger the handover of the terminal according to the measurement result. Specifically, how to determine that there are multiple solutions, the embodiment of the present application provides the following examples, such as the example a1 to the example a7, to determine the handover of the terminal to be triggered.
  • the embodiments of the present application are versatile: the signal quality still needs to be considered, and the 5G network slice is extended by the LTE carrier aggregation technology, that is, the same UE accesses the same slice instance, and may be allocated to different frequency bands according to the resource scheduling policy.
  • Carrier frequency
  • the same network slice instance of the neighboring base station can be deployed in different carrier frequency bands. This means that if the terminal is subordinate to a certain network slice instance and the service is not interrupted, switching from one base station to another, the operating frequency may change.
  • Example a1 The quality of the signal of the source base station (the terminal works on a certain carrier) is good, for example, higher than the preset signal quality threshold, that is, the service performance of the terminal acquired at the source base station is good, but when the frequency priority is switched,
  • the terminal's standard defines that working in a certain frequency band is more energy efficient/efficient, and may trigger the measurement and switching of the different frequency (the same slice instance different carriers).
  • Example a2 The quality of the signal of the source base station (the terminal works on a certain carrier) is not good, such as lower than the preset signal quality threshold, that is, the service performance of the terminal acquired at the source base station is not good, but when it is in the frequency priority
  • the terminal's standard defines that working in a certain frequency band is more energy-efficient/efficient, and may trigger measurement and switching of different frequencies (same carrier example different carriers).
  • Example a3 The quality of the signal of the source base station (the terminal works on a certain carrier) is not good, such as lower than the preset signal quality threshold, that is, the service performance of the terminal acquired at the source base station is not good, but if the signal of the neighboring base station is The quality (the terminal works on a certain carrier) is higher than the preset signal quality threshold, and it is determined that the terminal needs to be switched.
  • Example a4 When the signal quality of the neighboring base station (the same slice instance different carrier) is higher than a certain threshold, the source base station triggers a handover (to the same slice instance different carrier) request, that is, determines that the terminal needs to perform handover.
  • the source base station when the signal quality of the source base station is lower than a certain threshold, and the signal quality of the neighboring base station (the same slice instance different carrier) is higher than a certain threshold, the source base station triggers a handover (to the same slice instance different carrier) request, that is, determines the terminal. Need to switch.
  • the source base station triggers the handover (the same service quality type with the service type), that is, the terminal needs to perform the handover. That is, it is determined that the terminal needs to be switched.
  • the VoIP service of the Enhanced Mobile Internet Broadband (eMBB) network slice is taken as an example.
  • LTE as a different system can be regarded as another network slice for the 5G network.
  • the signal quality of the source base station is lower than a certain threshold, and the signal quality of the neighboring base station of the different system (the same service type, the same service quality level) is higher than a certain threshold, and the source base station triggers the handover (the same service quality as the service type of the different system) Level) request, that is, determine that the terminal needs to switch.
  • the base station can determine whether the terminal needs to be switched through multiple decision schemes.
  • signal quality priority considering signal quality priority and frequency priority, respectively, in the case of signal quality priority. If the signal quality of the neighboring base station is higher than that of the source base station, it is determined that the terminal needs to perform handover.
  • frequency priority if the signal quality of the neighboring base station is lower than that of the source base station, the inter-frequency measurement is still started.
  • the terminal if it is determined that the terminal needs to be handed over, there must be N quasi-target base stations among the M neighboring base stations; each of the N quasi-target base stations satisfies the condition: terminal access
  • the quasi-target base station performs better than the service obtained by accessing the current serving base station.
  • the neighboring base station whose signal quality is higher than the source base station in the neighboring base station may be determined as the quasi-target base station.
  • the neighbor base station on the particular frequency band in which the required network slice instance operates may be determined as the quasi-target base station.
  • the quasi-target base station that matches the information of the network slice instance corresponding to the terminal is searched from the quasi-target base station, and if there is no quasi-target base station whose information of the network slice instance matches the information of the network slice instance corresponding to the terminal, For the reconfiguration of the network sharding instance, an alternative solution is to find a base station as the target base station from the neighboring base stations with better service performance.
  • Other embodiments are provided in the embodiments of the present application, which are described in detail below.
  • each of the N quasi-target base stations satisfies the condition that: the terminal access quasi-target base station has better service performance than the access to the current serving base station; N is a positive integer not greater than M.
  • the source base station determines, according to the signal quality of the M neighboring base stations, the information of the network slice instances of the M neighboring base stations, and the information of the network slice instance corresponding to the terminal, the target base stations to be handed over by the M neighboring base stations, including: If there is no quasi-target base station whose information of the network slice instance matches the information of the network slice instance corresponding to the terminal, then: for each of the N quasi-target base stations, from the information of the network slice instance included in the quasi-target base station Determining: the information of the network slice instance with the highest similarity of the information of the network slice instance corresponding to the terminal, and the similarity between the information of the network slice instance with the highest similarity and the information of the network slice instance corresponding to the terminal; The similarity of the target base station, the target base station to be switched by the terminal is determined from the N quasi-target base stations; wherein the similarity between the information of the network slice instance of the quasi-target base station and the information of the network slice instance corresponding to the terminal is based
  • the network slice instance with the highest similarity can be selected for reconfiguration.
  • the reconfiguration process of the network slice instance changes.
  • the parameter items are as small as possible, and the range of values of the parameters is also as small as possible, which further speeds up the reconfiguration rate.
  • the terminal when determining that the terminal needs to perform handover, it may first determine whether there is a neighboring base station whose information of the network slice instance matches the information of the network slice instance corresponding to the terminal, and if yes, determine the neighboring base station with better service performance among the neighboring base stations. For the target base station.
  • determining a parameter type in a parameter of a network slice instance included in two network slice instances to be calculated such as a type of a module included in each layer in FIG. 2b.
  • the PDCP layer includes three modules, and the PDCP layer in the network slice instance 212 includes one module; and the parameters of the network slice instance included in the two network slice instances to be calculated are also determined.
  • the parameter value in the network such as the PHY layer TTI in the network slice instance 211 in FIG. 2b is 1 ms, and the PHY layer TTI in the network slice instance 212 is 0.5 ms.
  • the target base station to be switched by the terminal is determined from the N quasi-target base stations, and there are various schemes, for example, FIG. 2e provides a selection target based on FIG. 2d.
  • FIG. 2e provides a selection target based on FIG. 2d.
  • Step 251 The source base station sends a network slice instance reconfiguration request to the quasi-target base station.
  • Step 252 After the network segment instance reconfiguration is performed, the quasi-target base station is divided into two cases. If the first configuration is successful, the network node instance reconfiguration success response may be fed back to the source base station, and the second configuration fails. The network slice instance reconfiguration failure response may be fed back to the source base station, or no information is fed back, and the source base station does not receive the response message within the preset time period, that is, determines that the reconfiguration fails;
  • Step 253 The source base station may determine the target base station from among several quasi-target base stations that receive the network slice instance reconfiguration success response.
  • FIG. 2f is a schematic flowchart of a method for selecting a target base station based on FIG. 2d. As shown in FIG. 2f, step 226 of determining a target base station is implemented by using the following method flow:
  • Step 261 The source base station sends a network slice instance reconfiguration request to the MME.
  • Step 262 The MME transparently transmits a network slice instance reconfiguration request to the quasi-target base station.
  • Step 263 After the network segment instance reconfiguration is performed, the quasi-target base station may be divided into two cases. If the first configuration is successful, the network slice instance reconfiguration success response may be fed back to the MME, and the second configuration fails. Feeding back to the MME a network slice instance reconfiguration failure response, or not feeding back any information;
  • Step 264 If the MME receives the response information, the MME may retransmit the received network slice instance reconfiguration success response or the network slice instance reconfiguration failure response to the source base station.
  • Step 253 The source base station may determine the target base station from the several quasi-target base stations that receive the network slice instance reconfiguration success response. In another case, the source base station does not receive the response message within the preset duration, that is, the weight is determined. Configuration failed.
  • the target base station to be handed over by the terminal is determined from the N quasi-target base stations according to the similarity degree of each quasi-target base station, including: among the N quasi-target base stations: the highest similarity
  • the quasi-target base station is determined as the target base station; after determining the target base station to be handed over by the N quasi-target base stations according to the similarity degree of each quasi-target base station, the method further includes: the highest similarity to the N quasi-target base stations
  • the quasi-target base station sends a network slice instance reconfiguration request; wherein the network slice instance reconfiguration request includes information about the network slice instance corresponding to the terminal; if it is determined that the network slice instance reconfiguration fails, the N target base stations are removed.
  • the quasi-target base station with the highest similarity transmits the network slice instance reconfiguration request until receiving the network slice instance reconfiguration success response; the received The network slice instance reconfiguration success response corresponding to the quasi-target base station is re-determined as the target base station;
  • the network segment instance reconfiguration request is used to reconfigure the network slice instance included by the quasi-target base station that receives the network slice instance reconfiguration request, so that the reconfigured network slice instance is compatible with the network slice instance corresponding to the terminal.
  • Information. Reconfiguration will select the network slice instance operation with the highest similarity, which can increase the rate of reconfiguration. For example, the size of the TTI is adjusted from 1ms to 0.9ms. This action is for the air interface of the base station, in the case of hardware environment support, this It's just a modification of the software parameter configuration, very fast, and the time is negligible.
  • the source base station sends a network slice instance reconfiguration request to the quasi-target base station 1 to enable the quasi-target base station 1 to reconfigure the network slice instance with the highest information similarity of the network slice instance corresponding to the terminal. If it is determined that the network slice instance reconfiguration fails, for example, the network slice instance reconfiguration failure response is received or the network slice instance reconfiguration success response is not received within the preset time period, the network slice is sent to the N quasi-target base stations.
  • the quasi-target base station with the highest similarity transmits a network slice instance reconfiguration request, that is, sends a network slice instance reconfiguration request to the quasi-target base station 2, if the quasi-target base station 2 If the reconfiguration is successful, the quasi-target base station 2 is determined as the target base station. If the quasi-target base station 2 also fails to reconfigure, the network slice instance reconfiguration request is continued to be sent to the quasi-target base station 3. If the quasi-target base station 3 is successfully reconfigured, the quasi-target base station 3 is determined as the target base station. If the quasi-target base station 3 also fails to reconfigure, it is determined that the target base station is not available, and the flow is ended.
  • the terminal is determined from the N quasi-target base stations according to the similarity degree of each quasi-target base station.
  • the target base station to be switched includes: to the N quasi-target base stations: the order of similarity from high to low, the network slice instance reconfiguration request is sent by each of the P target base stations of the previous P bits;
  • the network slice instance reconfiguration request includes information about a network slice instance corresponding to the terminal; P is a positive integer not greater than N; and the network slice instance reconfiguration request is used to enable the target base station to receive the network slice instance reconfiguration request Performing a reconfiguration operation on the network slice instance included in the network, so that the reconfigured network slice instance is compatible with the information of the network slice instance corresponding to the terminal; and receiving at least one network slice instance reconfiguration successfully returned by the P target base stations And determining a target from the quasi-target base station corresponding to the at least one network slice instance reconfiguration success
  • one of the quasi-target base stations receiving the network slice instance reconfiguration success response can be found as the target base station, or in order to improve the reliability, a plurality of target base stations can be found.
  • the target base station is determined from the quasi-target base station corresponding to the at least one network slice instance reconfiguration success response, including: To the network slice instance reconfiguration success response returned by each of the L quasi-target base stations in P, the target retargeting base station with the best service performance after terminal access in the L quasi-target base stations is determined as the target Base station; L is a positive integer not greater than P.
  • another optional solution is: if the network slice instance reconfiguration successfully returned by one of the P target base stations is received, the oldest received network slice instance is reconfigured successfully. Responding to the corresponding quasi-target base station as the target base station, and transmitting a reconfiguration cancel command to the remaining P-1 quasi-target base stations of the P quasi-target base stations; wherein the reconfiguration cancel command is used to make the remaining P-1 quasi The target base station cancels the reconfiguration operation on the network slice instance. Specifically, the source base station sends a network slice instance reconfiguration request to the plurality of quasi-target base stations, and upon receiving a network slice instance reconfiguration success response, the network slice instance reconfiguration success response is the received first network slice.
  • the instance reconfiguration succeeds in response, indicating that the network segment instance reconfiguration success response corresponding to the quasi-target base station has a short delay, and the quasi-target base station corresponding to the network slice instance reconfiguration success response is determined as the target base station. In this way, the remaining P-1 quasi-target base stations can be avoided to be reconfigured, thereby saving network resource consumption.
  • the network slice instance reconfiguration success response includes the information of the network slice instance after the reconfiguration; wherein the network slice instance indicated by the information of the network slice instance after the reconfiguration is compatible with the network slice instance corresponding to the terminal The service carried by the network slice instance indicated by the information; the network slice instance reconfiguration success response is obtained after the target base station reconfigures the existing network slice instance of the base station.
  • the reconfigured network slice instance can not only run the service that is run before the network slice instance is reconfigured, but also The information of the network slice instance corresponding to the terminal can be compatible, and the service supported by the network slice instance corresponding to the terminal can be run.
  • the identifier of the network slice instance that is reconfigured on the quasi-target base station may be changed, for example, changed to the same as the identifier of the network slice instance corresponding to the terminal, or may not be changed.
  • the terminal access quasi-target base station has better service performance than the access to the current serving base station; N is not a positive integer greater than M; the source base station determines, according to the signal quality of the M neighboring base stations, the information of the network slice instances of the M neighboring base stations, and the information of the network slice instance corresponding to the terminal, the terminal needs to be switched from the M neighboring base stations.
  • the target base station includes: if there are K quasi-target base stations that match the information of the network slice instance with the information of the network slice instance corresponding to the terminal, then: K matching the information of the network slice instance with the information of the network slice instance corresponding to the terminal.
  • the quasi-target base stations are determined as target base stations; wherein K is a positive integer not greater than N.
  • the source base station may further send a handover request to the target base station; where the handover request includes information about the network slice instance corresponding to the terminal; and the source base station receives the handover returned by the target base station.
  • the information of the network slice instance to be accessed by the terminal where the network segment instance indicated by the information of the network slice instance to be accessed is indicated by the information of the network slice instance corresponding to the compatible terminal.
  • the service carried by the network slice instance Therefore, the process of the terminal switching to the target base station is implemented, and the terminal accesses the network slice instance of the network base station instance that can be compatible with the network slice instance corresponding to the terminal in the target base station, and ensures that the terminal service is not interrupted.
  • FIG. 2g is a schematic flowchart showing a method for selecting a target base station and a terminal handover according to an embodiment of the present application. As shown in FIG. 2g, the method includes:
  • Step 271 The source base station sends a handover request to the target base station.
  • the handover request may include information about the network slice instance corresponding to the terminal, so that the information about the network slice required by the target base station may be notified, so that the target base station accurately finds the terminal.
  • the handover request may further include a Radio Resource Control (RRC) context, such as a terminal capability, a current access stratum (AS) configuration, and a specific wireless of the terminal. Resource management information and the like; wherein the information of the network slice instance does not necessarily include the identifier of the network slice instance, for example, different network slice instances support one service set, and the same service may run on different network slice instances;
  • RRC Radio Resource Control
  • AS current access stratum
  • Step 272 The target base station performs a resource establishment process.
  • the resource establishment process includes, but is not limited to, allocating required resources, such as spectrum resources, computing, and storage resources, to the terminal.
  • Step 273 The target base station returns a handover request response to the source base station, where the handover request response may include an RRC connection reconfiguration message mobility control message (such as a target cell identifier and a frequency to be accessed by the terminal), and a general radio resource configuration message (such as a message requesting random access) and a dedicated radio resource configuration, a security configuration, and a Cell Radio Network Temporary Identifier (C-RNTI) (ie, a radio network temporary identifier (RNTI) used when the UE is in a certain cell Radio Network Tempory Identity, RNTI)).
  • C-RNTI Cell Radio Network Temporary Identifier
  • the handover request response further includes information such as a service type and a service quality level of the network slice instance.
  • Step 274 The source base station sends a handover command to the terminal, and the source base station may transparently forward the received handover request response to the terminal.
  • Step 275 the step may be an optional step of performing state transition between the source base station and the target base station; for the bearer requiring sequential packet delivery, the state transition message provides a sequence number and a hyper frame number (HFN) (HFN) To limit the number of bits of the transmission sequence number on the air interface, the target base station shall assign them to the first packet that must be transmitted without assigning a sequence number.
  • HFN hyper frame number
  • the source serving base station freezes its transmitter/receiver state, that is, stops allocating the PDCP sequence number (SN) to the downlink packet, and stops sending the uplink packet to the core network;
  • Step 276 The terminal sends an instruction to complete the handover to the target base station.
  • the instruction for completing the handover specifically refers to a process in which the terminal and the target base station complete radio resource control (RRC) connection reconfiguration and random access.
  • RRC radio resource control
  • Step 277 The target base station sends a path transfer request to the MME:
  • Step 278 The MME sends a path transfer request response to the target base station.
  • Step 279 The target base station sends an instruction for releasing the resource to the source base station, so that the resources of the source base station are released.
  • FIG. 2h is a schematic flowchart of a method for selecting a target base station and a terminal handover according to an embodiment of the present application. As shown in FIG. 2h, step 227 of determining a target base station is implemented by using the following method flow:
  • Step 281 The source base station sends a handover request to the MME.
  • the handover request may include information about the network slice instance corresponding to the terminal, so that the information about the network slice required by the target base station may be notified, so that the target base station can accurately find the terminal.
  • the network slice instance of the access optionally, the handover request may further include a Radio Resource Control (RRC) context, such as a terminal capability, a current AS configuration, and specific radio resource management information of the terminal, and the like;
  • RRC Radio Resource Control
  • the information of the slice instance does not necessarily include the identifier of the network slice instance. For example, different network slice instances support one service set, and the same service can run on different network slice instances.
  • Step 282 The MME transparently transmits a handover request to the target base station.
  • Step 283 The target base station performs a resource establishment process.
  • the resource establishment process includes, but is not limited to, allocating required resources, such as spectrum resources, computing, and storage resources, to the terminal.
  • Step 284 The target base station returns a handover request response to the MME.
  • Step 285 The MME returns a handover request response to the source base station, where the handover request response may include an RRC connection reconfiguration message mobility control message (such as a target cell identifier and a frequency to be accessed by the terminal), and a general radio resource configuration message (such as a request). Messages for random access) and dedicated radio resource configuration, security configuration and C-RNTI.
  • the handover request response further includes information such as a service type and a service quality level of the network slice instance.
  • Step 286 The source base station sends a handover command to the terminal.
  • the source base station may transparently forward the received handover request response to the terminal.
  • Step 287, the step and the step 288 may be an optional step, and the source base station sends an instruction for the state transition to the MME;
  • Step 288 The MME transparently transmits the state transition instruction to the target base station.
  • the state transition message For the bearer that needs to send the packet sequentially, the state transition message provides a sequence number and a hyper frame number (HFN) (the HFN is used to limit the transmission sequence number on the air interface. The number of bits), the target base station should assign them to the first packet that must be sent without assigning a sequence number.
  • HFN hyper frame number
  • the source serving base station freezes its transmitter/receiver state, that is, stops allocating the PDCP SN to the downlink packet, and stops sending the uplink packet to the core network;
  • Step 289 The terminal sends an instruction to complete the handover to the target base station.
  • the instruction for completing the handover specifically refers to a process in which the terminal and the target base station complete radio resource control (RRC) connection reconfiguration and random access.
  • RRC radio resource control
  • Step 290 The target base station sends a handover notification to the MME, to notify that the path is forwarded;
  • Step 291 The target base station sends an instruction for releasing the resource to the source base station, so that the resources of the source base station are released.
  • the embodiment of the present application can be applied to a network slice instance architecture in a future 5G network.
  • FIG. 3 is a schematic structural diagram of an apparatus for selecting a target base station according to an embodiment of the present application.
  • the embodiment of the present application provides an apparatus 300 for selecting a target base station, for performing any one of the foregoing methods.
  • the apparatus 300 for selecting a target base station includes a processor 301, a transceiver 302, a memory 303, and a communication interface 304; wherein the processor 301, the transceiver 302, the memory 303, and the communication interface 304 are connected to one another via a bus 305.
  • the bus 305 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus.
  • PCI peripheral component interconnect
  • EISA extended industry standard architecture
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 3, but it does not mean that there is only one bus or one type of bus.
  • the memory 303 may include a volatile memory such as a random-access memory (RAM); the memory may also include a non-volatile memory such as a flash memory.
  • RAM random-access memory
  • non-volatile memory such as a flash memory.
  • HDD hard disk drive
  • SSD solid-state drive
  • the memory 303 may also include a combination of the above types of memories.
  • the communication interface 304 can be a wired communication access port, a wireless communication interface, or a combination thereof, wherein the wired communication interface can be, for example, an Ethernet interface.
  • the Ethernet interface can be an optical interface, an electrical interface, or a combination thereof.
  • the wireless communication interface can be a WLAN interface.
  • the processor 301 can be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP.
  • the processor 301 may further include a hardware chip.
  • the hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof.
  • the PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL), or any combination thereof.
  • the memory 303 can also be used to store program instructions, and the processor 301 calls the program instructions stored in the memory 303 to perform one or more steps in the embodiment shown in the above scheme, or an optional implementation thereof.
  • the apparatus 300 for selecting a target base station implements the function of the apparatus for selecting the target base station in the above method.
  • the processor 301 is configured to control the transceiver 302 to perform signal reception and signal transmission according to an instruction to execute the memory storage.
  • the apparatus 300 of the target base station is selected to perform the following.
  • the processor 301 is configured to: if it is determined that the terminal needs to perform the base station handover, according to the signal quality of the M neighboring base stations, the information of the network slice instance of the M neighboring base stations, and the information of the network slice instance corresponding to the terminal, from the M neighbors
  • the base station determines the target base station to which the terminal needs to be handed over; where M is a positive integer; the information of the network slice instance of the M neighboring base stations and the information of each network slice instance in the information of the network slice instance corresponding to the terminal include: The indication information indicating the service type and the service quality level of the network slice instance indicated by the information of the network slice instance.
  • the information is based on the signal quality of the M neighboring base stations, the information of the network slice instance of the M neighboring base stations, and the information of the network slice instance corresponding to the terminal.
  • Determining, by the neighboring base station, the target base station to be handed over by the terminal; the information of the network slice instance of the M neighboring base stations and the information of each network slice instance in the information of the network slice instance corresponding to the terminal include: The indication of the service type and service quality level of the network slice instance indicated by the information of the instance.
  • the target base station is selected to take into account the signal of the neighbor base station.
  • the quality of the network slice instance on the neighboring base station is also considered, so that the selected target base station can be better adapted to the network slice instance application scenario. Furthermore, the problem that the selected target base station does not match the information of the network slice instance of the terminal can be avoided.
  • the relationship between the network slice and the network slice instance may be 1:R, and R is a positive integer; that is, there are R different network slice instances under the same type of network slice.
  • the network slice instance in this embodiment is a collection of physical and logical resources.
  • the information of the network slice instance of the source base station, the target base station, or the neighboring base station in the embodiment of the present application refers specifically to the information of the network slice instance in the network slice instance included in the base station.
  • the network slice instance runs on the service, and the information of the network slice instance corresponding to the terminal refers to the information of the network slice instance corresponding to the service used by the terminal.
  • the transceiver 302 is configured before the target base station to be handed over by the M neighboring base stations according to the signal quality of the M neighboring base stations, the information of the network slice instance of the M neighboring base stations, and the information of the network slice instance corresponding to the terminal. And the method is further configured to: receive the information of the network slice instance of the M neighboring base stations by using a wired or wireless form; and the transceiver 302 is further configured to: broadcast the information of the network slice instance of the source base station by using a wired or wireless form.
  • the information of the network slice instance includes: a network slice type, a slice Instance Identity (Slice ID), a quality of service class identifier (QCI), and a service.
  • any one or more of a Service Type and a slice parameter of a network slice instance if the Xn interface is connected between the base stations, the base station preferentially selects the information of the Xn interface to broadcast its own network slice instance, which saves time and effort; if the Xn interface between the base stations is not opened, Then, the base station can broadcast the information of its own network slice instance in the air interface. In this way, the base station can acquire information of the network slice instance of the neighbor base station.
  • the information of the network slice instance of the M neighboring base stations and the information of each network slice instance in the information of the network slice instance corresponding to the terminal in the embodiment of the present application may be, but not limited to, including: indicating the information of the network slice instance. Indicates the service type and quality of service level of the network slice instance. For example, the information of each network slice instance may directly include the service type and the service quality level of the network slice instance. The identifier of the network slice instance may also be included, and the service type and the service quality level may be detected according to the identifier of the network slice instance.
  • N quasi-target base stations in the M neighboring base stations there are N quasi-target base stations in the M neighboring base stations; each of the N quasi-target base stations satisfies the condition: the terminal accesses the quasi-target base station and the access to the current serving base station The performance is better; N is a positive integer not greater than M; the processor 301, based on the signal quality of the M neighboring base stations, the information of the network slice instance of the M neighboring base stations, and the information of the network slice instance corresponding to the terminal, from the M When the target base station to be handed over by the terminal is determined by the neighboring base stations, if there is no quasi-target base station whose information of the network slice instance matches the information of the network slice instance corresponding to the terminal, then for each of the N quasi-target base stations The quasi-target base station determines, from the information of the network slice instance included in the quasi-target base station, the information of the network slice instance with the highest similarity of the information of the network slice instance corresponding to the terminal, and the information of the
  • the network slice instance with the highest similarity can be selected for reconfiguration.
  • the reconfiguration process of the network slice instance changes.
  • the parameter items are as small as possible, and the range of values of the parameters is also as small as possible, which further speeds up the reconfiguration rate.
  • the processor 301 is configured to: when determining the target base station to be handed over by the N quasi-target base stations according to the similarity degree of each quasi-target base station, for: Determining, among the N quasi-target base stations, the quasi-target base station with the highest similarity as the target base station; and the transceiver 302 determining, according to the similarity corresponding to each quasi-target base station, the terminal needs from the N quasi-target base stations.
  • the network slice instance reconfiguration request is sent to the quasi-target base station with the highest similarity among the N quasi-target base stations, where the network slice instance reconfiguration request includes the information of the network slice instance corresponding to the terminal.
  • the quasi-target base station with the highest similarity transmits the network slice
  • the instance reconfiguration request is received until the network slice instance reconfiguration is successfully received.
  • the processor 301 is further configured to: pass the transceiver 302.
  • the received network slice instance reconfiguration success response corresponding to the quasi-target base station is re-determined as the target base station; wherein the network slice instance reconfiguration request is used to enable the quasi-target base station receiving the network slice instance reconfiguration request to include the network itself
  • the slice instance performs a reconfiguration operation, so that the reconfigured network slice instance is compatible with the information of the network slice instance corresponding to the terminal.
  • the processor 301 selects the similarity according to each of the quasi-target base stations.
  • the specific use of the transceivers 302 is performed by the transceiver 302 to the N target base stations: the order of similarity is high to low.
  • Each of the P target multi-target base stations of the P-bit transmits a network slice instance reconfiguration request; wherein the network slice instance reconfiguration request includes information of a network slice instance corresponding to the terminal; P is a positive integer not greater than N
  • the network slice instance reconfiguration request is used to reconfigure the network slice instance included by the quasi-target base station that receives the network slice instance reconfiguration request, so that the reconfigured network slice instance is compatible with the network slice corresponding to the terminal. If the information of the instance is received by the transceiver 302 and the at least one network slice instance reconfiguration successful response returned by the P target base stations is received, at least one The network slice instance reconfiguration success response determines the target base station among the corresponding quasi-target base stations.
  • An implementation may find one of the quasi-target base stations that received the network slice instance reconfiguration success response as the target base station, or find a plurality of target base stations for improving reliability.
  • the processor 301 after receiving the at least one network slice instance reconfiguration success response returned by the P quasi-target base stations, determining the target base station from the quasi-target base station corresponding to the at least one network slice instance reconfiguration success response.
  • the terminal is connected to the L target base stations.
  • the quasi-target base station with the best service performance is determined as the target base station; L is a positive integer not greater than P.
  • Another alternative is to slice the earliest received network if the network slice instance reconfiguration successful response returned by one of the P target base stations is received by the transceiver 302.
  • the quasi-target base station corresponding to the instance reconfiguration success response is determined as the target base station, and sends a reconfiguration cancel command to the remaining P-1 quasi-target base stations of the P quasi-target base stations; wherein the reconfiguration cancel command is used to make the remaining P - 1 quasi-target base station cancels the reconfiguration operation of the network slice instance.
  • each of the N quasi-target base stations can satisfy the condition that: the terminal access quasi-target base station has better service performance than the access current current base station; N is a positive integer not greater than M; the processor 301 determines, according to the signal quality of the M neighboring base stations, the information of the network slice instance of the M neighboring base stations, and the information of the network slice instance corresponding to the terminal, from the M neighboring base stations
  • the target base station to be switched by the terminal is used, if there are K quasi-target base stations that match the information of the network slice instance with the information of the network slice instance corresponding to the terminal, the network slice instance information and the network slice corresponding to the terminal are used.
  • the K quasi-target base stations to which the information of the instance matches are determined as the target base station; wherein K is a positive integer not greater than N.
  • the processor 301 is further configured to: after determining, by the M neighboring base stations, the target base station to be handed over by the terminal, send, by using the transceiver, a handover request to the target base station; where The request includes the information of the network slice instance corresponding to the terminal, and the switch 302 receives the handover response returned by the target base station, where the handover response includes information about the network slice instance to be accessed by the terminal, where The network slice instance indicated by the information of the network slice instance to be accessed: the service carried by the network slice instance indicated by the information of the network slice instance corresponding to the terminal. Therefore, the process of the terminal switching to the target base station is implemented, and the terminal accesses the network slice instance of the network base station instance that can be compatible with the network slice instance corresponding to the terminal in the target base station, and ensures that the terminal service is not interrupted.
  • FIG. 4 is a schematic structural diagram of an apparatus for selecting a target base station according to an embodiment of the present application.
  • the embodiment of the present application provides an apparatus for selecting a target base station, which is used to execute the foregoing method flow.
  • the apparatus 400 for selecting a target base station can be used to perform any of the above methods.
  • the apparatus 400 for selecting a target base station includes a receiving unit 401, a processing unit 402, and a transmitting unit 403.
  • the processing unit 402 is configured to: if it is determined that the terminal needs to perform the base station handover, according to the signal quality of the M neighboring base stations, the information of the network slice instance of the M neighboring base stations, and the information of the network slice instance corresponding to the terminal, from the M neighbors
  • the base station determines the target base station to which the terminal needs to be handed over; where M is a positive integer; the information of the network slice instance of the M neighboring base stations and the information of each network slice instance in the information of the network slice instance corresponding to the terminal include: The indication information indicating the service type and the service quality level of the network slice instance indicated by the information of the network slice instance.
  • the information is based on the signal quality of the M neighboring base stations, the information of the network slice instance of the M neighboring base stations, and the information of the network slice instance corresponding to the terminal.
  • Determining, by the neighboring base station, the target base station to be handed over by the terminal; the information of the network slice instance of the M neighboring base stations and the information of each network slice instance in the information of the network slice instance corresponding to the terminal include: The indication of the service type and service quality level of the network slice instance indicated by the information of the instance.
  • the target base station is selected to take into account the signal of the neighbor base station.
  • the quality of the network slice instance on the neighboring base station is also considered, so that the selected target base station can be better adapted to the network slice instance application scenario. Furthermore, the problem that the selected target base station does not match the information of the network slice instance of the terminal can be avoided.
  • the relationship between the network slice and the network slice instance may be 1:R, and R is a positive integer; that is, there are R different network slice instances under the same type of network slice.
  • a network slice instance is a collection of physical and logical resources.
  • the information of the network slice instance of the source base station, the target base station, or the neighboring base station in the embodiment of the present application refers specifically to the information of the network slice instance in the network slice instance included in the base station.
  • the network slice instance runs on the service, and the information of the network slice instance corresponding to the terminal refers to the information of the network slice instance corresponding to the service used by the terminal.
  • the information of the network slice instance of the M neighboring base stations, and the information of the network slice instance corresponding to the terminal is further configured to: receive the information of the network slice instance of the M neighboring base stations by using a wired or wireless form; and the sending unit 403 is further configured to: broadcast the information of the network slice instance of the source base station by using a wired or wireless form .
  • the information of the network slice instance includes: a network slice type, a slice Instance Identity (Slice ID), a quality of service class identifier (QCI), and a service.
  • any one or more of a Service Type and a slice parameter of a network slice instance if the Xn interface is connected between the base stations, the base station preferentially selects the information of the Xn interface to broadcast its own network slice instance, which saves time and effort; if the Xn interface between the base stations is not opened, Then, the base station can broadcast the information of its own network slice instance in the air interface. In this way, the base station can acquire information of the network slice instance of the neighbor base station.
  • the information about the network slice instance of the M neighboring base stations and the information of each network slice instance in the information of the network slice instance corresponding to the terminal in the embodiment of the present application include: indicating, by the information used to indicate the network slice instance. Indicates the service type and quality of service level of the network slice instance.
  • the information of each network slice instance may directly include the service type and the service quality level of the network slice instance.
  • the identifier of the network slice instance may also be included, and the service type and the service quality level may be detected according to the identifier of the network slice instance.
  • N quasi-target base stations in the M neighboring base stations there are N quasi-target base stations in the M neighboring base stations; each of the N quasi-target base stations satisfies the condition: the terminal accesses the quasi-target base station and the access to the current serving base station The performance is better; N is a positive integer not greater than M; the processing unit 402, according to the signal quality of the M neighboring base stations, the information of the network slice instance of the M neighboring base stations, and the information of the network slice instance corresponding to the terminal, from the M
  • the target base station to be handed over by the terminal is determined by the neighboring base stations, if there is no quasi-target base station whose information of the network slice instance matches the information of the network slice instance corresponding to the terminal, then for each of the N quasi-target base stations
  • the quasi-target base station determines, from the information of the network slice instance included in the quasi-target base station, the information of the network slice instance with the highest similarity of the information of the network slice instance corresponding to the terminal, and the information
  • the network slice instance with the highest similarity can be selected for reconfiguration.
  • the reconfiguration process of the network slice instance changes.
  • the parameter items are as small as possible, and the range of values of the parameters is also as small as possible, which further speeds up the reconfiguration rate.
  • the processing unit 402 is configured to: when determining the target base station to be handed over by the N quasi-target base stations according to the similarity corresponding to each quasi-target base station, for: Determining, among the N quasi-target base stations, the quasi-target base station with the highest similarity as the target base station; and sending unit 403, determining, by the processing unit 402, the terminal needs from the N quasi-target base stations according to the similarity corresponding to each quasi-target base station After the target base station is switched, the network slice instance reconfiguration request is sent to the quasi-target base station with the highest similarity among the N quasi-target base stations, where the network slice instance reconfiguration request includes the information of the network slice instance corresponding to the terminal.
  • the quasi-target base station with the highest similarity transmits the network slice
  • the instance reconfiguration request is received until the network slice instance reconfiguration success response is received;
  • the processing unit 402 is further configured to: pass The quasi-target base station corresponding to the network slice instance reconfiguration success response received by the receiving unit 401 is re-determined as the target base station; wherein the network slice instance reconfiguration request is used to enable the quasi-target base station receiving the network slice instance reconfiguration request to The included network slice instance performs a reconfiguration operation, so that the reconfigured network slice instance is compatible with the information of the network slice instance corresponding to the terminal.
  • the sending unit 403 is configured to: to the N quasi-target base stations: the similarity is high to low.
  • the sequence ordering of each of the P target base stations of the first P bit sends a network slice instance reconfiguration request; wherein the network slice instance reconfiguration request includes information of the network slice instance corresponding to the terminal; P is not a positive integer greater than N; the network slice instance reconfiguration request is used to reconfigure the network slice instance included by the quasi-target base station receiving the network slice instance reconfiguration request to make the reconfigured network slice instance compatible
  • one of the quasi-target base stations receiving the network slice instance reconfiguration success response can be found as the target base station, or in order to improve the reliability, a plurality of target base stations can be found.
  • the processing unit 402 determines, after receiving the at least one network slice instance reconfiguration success response returned by the P quasi-target base stations, determining the target base station from the quasi-target base station corresponding to the at least one network slice instance reconfiguration success response.
  • the receiving, by the receiving unit 401, the network slice instance reconfiguration success response returned by each of the L target base stations in the P is received, the terminal is connected to the L target base stations.
  • the quasi-target base station with the best service performance is determined as the target base station; L is a positive integer not greater than P.
  • another optional solution is: if the network slice instance reconfiguration success response returned by one of the P target base stations is received by the receiving unit 401, the earliest received network slice is received.
  • the quasi-target base station corresponding to the instance reconfiguration success response is determined as the target base station, and sends a reconfiguration cancel command to the remaining P-1 quasi-target base stations of the P quasi-target base stations; wherein the reconfiguration cancel command is used to make the remaining P - 1 quasi-target base station cancels the reconfiguration operation of the network slice instance.
  • each of the N quasi-target base stations can satisfy the condition that the terminal access quasi-target base station has better service performance than accessing the current serving base station; a positive integer that is not greater than M.
  • the processing unit 402 determines, according to the signal quality of the M neighboring base stations, the information of the network slice instance of the M neighboring base stations, and the information of the network slice instance corresponding to the terminal, from the M neighboring base stations.
  • the target base station to be switched by the terminal is used, if there are K quasi-target base stations that match the information of the network slice instance with the information of the network slice instance corresponding to the terminal, the information of the network slice instance and the network corresponding to the terminal are used.
  • the K quasi-target base stations to which the information of the slice instance matches are determined as the target base station; wherein K is a positive integer not greater than N.
  • the sending unit 403 may further send a handover request to the target base station, where the handover request includes information of the network slice instance corresponding to the terminal, and the receiving unit 401 further uses And receiving the handover response returned by the target base station, where the handover response includes information about the network slice instance to be accessed by the terminal, where the network slice instance indicated by the information of the network slice instance to be accessed is:
  • the traffic carried by the network slice instance indicated by the information of the network slice instance is implemented, and the terminal accesses the network slice instance of the network base station instance that can be compatible with the network slice instance corresponding to the terminal in the target base station, and ensures that the terminal service is not interrupted.
  • the receiving unit 401 and the sending unit 403 may be implemented by the transceiver 302, and the processing unit 402 may be implemented by the processor 301.
  • the apparatus 300 for selecting a target base station may include a processor 301, a transceiver 302, and a memory 303.
  • the memory 303 can be used to store the code when the processor 301 executes the solution, and the code can be a program/code pre-installed when the device 300 of the target base station is selected.
  • a computer program product includes one or more computer instructions.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer storage medium or transferred from one computer storage medium to another computer storage medium, for example, computer instructions can be wired from a website site, computer, server or data center (eg, coaxial cable, optical fiber, Digital Subscriber Line (DSL) or wireless (eg, infrared, wireless, microwave, etc.) transmission to another website site, computer, server or data center.
  • the computer storage medium can be any available media that can be accessed by the computer or a data storage device such as a server, data center, or the like, including one or more available media.
  • Usable media can be magnetic media (eg, floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical media (eg, CD, DVD, BD, HVD, etc.), or semiconductor media (eg, ROM, EPROM, EEPROM, Non-volatile memory (NAND FLASH), solid state disk (SSD), etc.
  • magnetic media eg, floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.
  • optical media eg, CD, DVD, BD, HVD, etc.
  • semiconductor media eg, ROM, EPROM, EEPROM, Non-volatile memory (NAND FLASH), solid state disk (SSD), etc.
  • embodiments of the present application can be provided as a method, system, or computer program product. Therefore, the embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Moreover, embodiments of the present application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG.
  • These computer instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine such that instructions executed by a processor of a computer or other programmable data processing device are utilized for Means for implementing the functions specified in one or more flows of the flowchart or in a block or blocks of the flowchart.
  • the computer instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device, the instruction device A function that is specified in one or more blocks of a flow or a flow and/or a block diagram of a flowchart.

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Abstract

L'invention concerne un procédé et un dispositif de sélection d'une station de base cible, et un support de stockage, utilisés pour sélectionner une meilleure station de base cible pour un terminal dans un scénario d'application d'instance de tranche de réseau. Dans le mode de réalisation de la présente invention, une station de base source détermine, à partir d'un nombre de M de stations de base voisines et en fonction de la qualité de signal des M stations de base voisines, des informations d'instances de tranche de réseau des M stations de base voisines et des informations d'une instance de tranche de réseau correspondant au terminal, une station de base cible devant être commutée par le terminal ; les informations de chaque instance de tranche de réseau dans les informations des instances de tranche de réseau des M stations de base voisines et dans les informations de l'instance de tranche de réseau correspondant au terminal comprennent : des informations d'indication utilisées pour indiquer un type de service et un niveau de qualité de service d'une instance de tranche de réseau indiquée par les informations de l'instance de tranche de réseau. De cette manière, lorsque la station de base cible est sélectionnée, la qualité de signal des stations de base voisines est considérée, et les informations des instances de tranche de réseau sur les stations de base voisines sont également considérées, de telle sorte que la station de base cible sélectionnée peut être mieux adaptée au scénario d'application d'instance de tranche de réseau.
PCT/CN2018/082340 2017-04-11 2018-04-09 Procédé et dispositif de sélection d'une station de base cible et support de stockage Ceased WO2018188557A1 (fr)

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