CN111988819A - Method, system and base station for keeping continuity of slicing service in cell switching scene - Google Patents
Method, system and base station for keeping continuity of slicing service in cell switching scene Download PDFInfo
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- CN111988819A CN111988819A CN201910422188.1A CN201910422188A CN111988819A CN 111988819 A CN111988819 A CN 111988819A CN 201910422188 A CN201910422188 A CN 201910422188A CN 111988819 A CN111988819 A CN 111988819A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
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Abstract
The disclosure provides a method, a system and a base station for keeping continuity of slicing service in a cell switching scene, and relates to the field of mobile communication. The method comprises the following steps: receiving a network slice type supported by a base station of an adjacent cell of a current resident cell of a terminal; selecting a candidate cell set according to the Reference Signal Received Power (RSRP) value of the adjacent cell; and selecting a cell with the same network slice type supported by the base station as the network slice type supported by the base station of the cell where the terminal currently resides as a target cell to be switched in the candidate cell set so as to switch the terminal to the target cell. The method and the device can improve the continuity of the slicing service in the cell switching process.
Description
Technical Field
The present disclosure relates to the field of mobile communications, and in particular, to a method, a system, and a base station for maintaining continuity of slice services in a cell handover scenario.
Background
The network slice is mainly oriented to vertical industry users, the slice effective range can be regional, and one network slice only covers a plurality of adjacent cells.
A user may experience cell switching during a moving process, and in the current switching scheme, only a neighboring cell with a maximum Reference Signal Receiving Power (Reference Signal Receiving Power) value of an optimal beam RSRP is considered to be selected as a target cell. If the cell supports the slice type, the slice service is not interrupted; otherwise, a default slice is selected for the user, resulting in a degraded or even interrupted on-line slicing service experience.
Scenarios where this problem occurs include: a user is positioned at the edge of a slice, and always selects a cell outside the slice area, so that a slice service cannot be established; or, when the user moves, the user switches to the outside of the slice area, and the service quality is reduced or interrupted.
Disclosure of Invention
The technical problem to be solved by the present disclosure is to provide a method, a system and a base station for maintaining continuity of a slicing service in a cell handover scenario, which can improve continuity of the slicing service in a cell handover process.
According to an aspect of the present disclosure, a method for maintaining continuity of a slice service in a cell handover scenario is provided, including: receiving a network slice type supported by a base station of an adjacent cell of a current resident cell of a terminal; selecting a candidate cell set according to the Reference Signal Received Power (RSRP) value of the adjacent cell; and selecting a cell with the same network slice type supported by the base station and the network slice type supported by the base station of the cell where the terminal currently resides as a target cell to be switched in the candidate cell set so as to switch the terminal to the target cell.
In one embodiment, a cell with the largest RSRP value in cells, of which the network slice type supported by the base station is the same as the network slice type supported by the base station of the cell where the terminal currently resides, is selected as a target cell to be switched.
In one embodiment, if there is no cell in the candidate cell set with the network slice type supported by the base station being the same as the network slice type supported by the base station of the cell in which the terminal currently resides, a cell with the largest RSRP value in cells in which the network slice type supported by the base station is closest to the network slice type supported by the base station of the cell in which the terminal currently resides is selected as a target cell to be switched; and if the cell with the network slice type supported by the base station closest to the network slice type supported by the base station of the cell in which the terminal currently resides is not in the candidate cell set, selecting the cell with the maximum RSRP value in the candidate cell set as the target cell to be switched.
In one embodiment, priority information of network slice types supported by a terminal is acquired; selecting a cell which can support the terminal network slice type by a base station in the candidate cell set as a candidate target cell; and selecting the cell with the maximum RSRP value in the cells with the highest network slice type priority supported by the base station from the candidate target cells as a target cell to be switched.
In an embodiment, if the candidate cell set includes candidate cells in which network slice types supported by a plurality of base stations are the same as a highest priority network slice type supported by the terminal, a cell with a maximum RSRP value among the cells supporting the most network slice types is selected as a target cell to be switched from among the candidate cells in which the highest priority network slice type supported by the terminal is the same.
In one embodiment, supported network slice type information sent by a neighboring cell base station through an Xn interface is received; and/or receiving network slice type information sent by the adjacent cell base station through the Ng interface by using the core network.
In one embodiment, a cell with an RSRP value larger than that of a cell in which the terminal currently resides in an adjacent cell is taken as a candidate cell set.
According to another aspect of the present disclosure, there is also provided a base station, including: the network slice type acquisition unit is configured to receive a network slice type supported by a base station of an adjacent cell of a cell where the terminal currently resides; a candidate cell set selection unit configured to select a candidate cell set according to Reference Signal Received Power (RSRP) values of neighboring cells; and the target cell determining unit is configured to select a cell with the same network slice type supported by the base station and the network slice type supported by the base station of the cell where the terminal currently resides as the target cell to be switched in the candidate cell set so as to switch the terminal to the target cell.
In one embodiment, the target cell determining unit is configured to select, as the target cell to be switched, a cell with the largest RSRP value in cells, of which the network slice type supported by the base station is the same as the network slice type supported by the base station of the cell in which the terminal currently resides, in the candidate cell set.
In one embodiment, the terminal comprises a priority acquisition unit configured to acquire priority information of network slice types supported by the terminal; wherein the target cell determination unit is further configured to select a cell, as a candidate target cell, in the candidate cell set, for which the base station can support the terminal network slice type; and selecting the cell with the maximum RSRP value in the cells with the highest network slice type priority supported by the base station from the candidate target cells as a target cell to be switched.
According to another aspect of the present disclosure, there is also provided a base station, including: a memory; and a processor coupled to the memory, the processor configured to perform the method as described above based on instructions stored in the memory.
According to another aspect of the present disclosure, a system for maintaining continuity of slice service in a cell handover scenario is further provided, including: a base station; and a core network configured to acquire the network slice information and to transfer the network slice information to the base station.
According to another aspect of the present disclosure, a computer-readable storage medium is also proposed, on which computer program instructions are stored, which instructions, when executed by a processor, implement the steps of the above-described method.
Compared with the prior art, the method and the device have the advantages that when the terminal cell is switched, the RSRP value of the adjacent cell is considered, and the network slice type supported by the base station of the adjacent cell is considered, so that the continuity of the slice service in the cell switching process is improved.
Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.
The present disclosure may be understood more clearly and in accordance with the following detailed description, taken with reference to the accompanying drawings,
wherein:
fig. 1 is a flowchart illustrating an embodiment of a method for maintaining slice service continuity in a cell handover scenario according to the present disclosure.
Fig. 2 is a flowchart illustrating another embodiment of a method for maintaining slice service continuity in a cell handover scenario according to the present disclosure.
Fig. 3 is a flowchart illustrating another embodiment of a method for maintaining slice service continuity in a cell handover scenario according to the present disclosure.
Fig. 4 is a flowchart illustrating another embodiment of a method for maintaining slice service continuity in a cell handover scenario according to the present disclosure.
Fig. 5 is a flowchart illustrating another embodiment of a method for maintaining slice service continuity in a cell handover scenario according to the present disclosure.
Fig. 6 is a schematic diagram of base station interaction according to the present disclosure.
Fig. 7 is a schematic structural diagram of an embodiment of a base station according to the present disclosure.
Fig. 8 is a schematic structural diagram of another embodiment of a base station according to the present disclosure.
Fig. 9 is a schematic structural diagram of another embodiment of the base station of the present disclosure.
Fig. 10 is a schematic structural diagram of another embodiment of a base station according to the present disclosure.
Fig. 11 is a schematic structural diagram illustrating an embodiment of a system for maintaining continuity of slice service in a cell handover scenario according to the present disclosure.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
For the purpose of promoting a better understanding of the objects, aspects and advantages of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.
Fig. 1 is a flowchart illustrating an embodiment of a method for maintaining slice service continuity in a cell handover scenario according to the present disclosure. This step may be performed by the base station of the cell in which the terminal currently camps.
In step 110, the network slice types supported by the base station of the neighboring cell of the cell where the terminal currently resides are received. As shown in fig. 6, if the network slice type supported by the terminal is 1, and the terminal currently resides in the cell 1, and both the cell 2 and the cell 3 have a neighboring cell relationship with the cell 1, the base station of the terminal currently residing in the cell 1 may receive supported network slice type information sent by the base stations of the neighboring cells 1 and 2 through an Xn interface, or receive network slice type information sent by the base stations of the neighboring cells 1 and 2 through an Ng interface by using a core network. The core network can add functions of slice information collection and transmission, and is responsible for collecting slice information of all neighboring cells of the source cell and transmitting the slice information to the base station of the source cell.
At step 120, a set of candidate cells is selected according to the RSRP values of the neighboring cells. For example, the RSRP values of the neighboring cells are ranked, and cells in the neighboring cells, the RSRP of which is greater than the RSRP value of the cell in which the terminal currently resides, are used as the candidate cell set. For example, when selecting a target cell for a terminal from cell 1, RSRP2 of cell 2 and RSRP3 of cell 3 are both greater than RSRP1 of cell 1, then cell 1 and cell 2 are both considered candidate cells.
In step 130, a cell with the same network slice type supported by the base station as the network slice type supported by the base station of the cell where the terminal currently resides is selected as a target cell to be switched in the candidate cell set, so as to switch the terminal to the target cell. For example, if the network slice type supported by the base station of cell 1 is a, the base station of cell 2 does not support network slice type a, and the base station of cell 3 supports network slice type a, then cell 3 is selected as the target cell, and the terminal is handed over to cell 3.
In the above embodiment, when performing cell handover of a terminal, the RSRP value of the neighboring cell is considered, and the network slice type supported by the base station of the neighboring cell is also considered, so that the continuity of the slice service in the cell handover process is improved.
Fig. 2 is a flowchart illustrating another embodiment of a method for maintaining slice service continuity in a cell handover scenario according to the present disclosure.
In step 210, network slice types supported by neighboring cell base stations are received.
In step 220, the RSRP of the neighboring cell is obtained by the terminal.
In step 230, the RSRPs of the neighboring cells are ranked, and the cell with the RSRP value greater than that of the source cell is selected as the candidate cell.
In step 240, it is determined whether there is a cell in the candidate cells with the same network slice type supported by the base station as the network slice type supported by the base station of the source cell, if so, step 250 is executed, otherwise, step 260 is executed.
In step 250, the cell with the maximum RSRP value in the cells with the same network slice type supported by the base station and the network slice type supported by the source cell base station is selected as the target cell to be switched.
In step 260, it is determined whether there is a cell in the candidate cells with the network slice type supported by the base station closest to the network slice type supported by the base station of the source cell, if so, step 270 is executed, otherwise, step 280 is executed.
In step 270, the cell with the largest RSRP value in the cells with the network slice type supported by the base station closest to the network slice type supported by the source cell base station is selected as the target cell to be switched.
In step 280, the cell with the largest RSRP value is selected as the target cell to be handed over.
In the above embodiment, when the target cell to be switched is selected, the cell supporting the terminal network slicing type and having the best signal as much as possible is selected to ensure that the slicing service is not interrupted, and a protection measure is added to ensure that at least the control signaling is not interrupted when the service cannot be ensured, thereby improving the user experience.
Fig. 3 is a flowchart illustrating another embodiment of a method for maintaining slice service continuity in a cell handover scenario according to the present disclosure.
In step 310, network slice types supported by neighboring cell base stations are received.
In step 320, the RSRP of the neighboring cell is obtained by the terminal.
In step 330, priority information of network slice types supported by the terminal is acquired.
In step 340, RSRPs of neighboring cells are ranked, and cells with RSRP values greater than that of the source cell are selected as candidate cells.
In step 350, a cell which can support the terminal network slice type by the base station is selected as a candidate target cell in the candidate cell set.
In step 360, a cell with the largest RSRP value among the cells with the highest network slice type priority supported by the base station is selected as a target cell to be switched.
For example, if the terminal supports the network slice types including a type a and a type B, but the priority of the type a is higher than that of the type B, the base station of the neighboring cell 2 supports the type a, and the base station of the neighboring cell 3 supports the type B, the neighboring cell 2 is selected as the target cell.
For example, the network slice types supported by the terminal include a type, B type and C type, but the priority of the a type is higher than that of the B type, the priority of the B type is higher than that of the C type, the base station of the neighboring cell 2 supports the B type, the base station of the neighboring cell 3 supports the C type, and the base station of the neighboring cell 4 supports the D type, and since the base stations corresponding to the neighboring cell 2 and the neighboring cell 3 can meet the requirement that the terminal supports the network slice type, the neighboring cell 2 and the neighboring cell 3 are selected first, and then the cell with the highest network slice type priority supported by the base station, that is, the neighboring cell 2 is selected as the target cell in the neighboring cell 2 and the neighboring cell 3.
In an embodiment, if the candidate cells include candidate cells in which network slice types supported by a plurality of base stations are the same as a highest priority network slice type supported by the terminal, a cell with a maximum RSRP value in the cells supporting the most network slice types is selected as a target cell to be switched from among the candidate cells in which the highest priority network slice type supported by the terminal is the same.
For example, if the terminal supports the network slice types including a type a and a type B, but the priority of the type a is higher than that of the type B, the base station of the neighboring cell 2 supports the type a and the type B, and the base station of the neighboring cell 3 supports the type a, the neighboring cell 2 is selected as the target cell.
In one embodiment, a cell with the maximum RSRP value is selected as a target cell to be switched from cells in which a network slice type supported by a base station is the same as a highest priority network slice type supported by a terminal among candidate cells.
In the above embodiment, when selecting the target cell to be switched, under the condition that the terminal supports the multi-slice service, it is first ensured that the slice service with the highest priority is not interrupted.
Fig. 4 is a flowchart illustrating another embodiment of a method for maintaining slice service continuity in a cell handover scenario according to the present disclosure.
In step 410, the source base station adds neighboring cell network slice information, including a network slice type, over the Xn interface.
In step 420, the source base station sends a neighbor measurement control instruction to the terminal.
In step 430, the terminal reports a neighbor cell measurement report, where the measurement report includes an RSRP value of a neighbor cell.
At step 440, the source base station selects a set of candidate cells according to the RSRP value.
In step 450, the cell with the largest RSRP value among the cells of the same network slice type supported by the source cell is selected as the target cell in the candidate cell set.
And if the terminal supports the multi-network slice type, selecting candidate target cells in the candidate cell set according to the priority of the network slice type supported by the terminal, and selecting the cell with the maximum RSRP value as the target cell from the candidate target cells.
And if the candidate cell set comprises candidate cells of the highest priority network slice type supported by the plurality of terminals, selecting the cell with the maximum RSRP value in the cells supporting the most network slice types as a target cell to be switched from the candidate cells with the same highest priority network slice type supported by the terminals.
In step 460, the source base station sends a handover request to the target base station of the target cell.
In step 470, the target base station sends a handover request response to the source base station.
In step 480, the terminal switches to the cell where the target base station is located.
In step 490, the target base station sends a path switch request to the core network.
In step 4100, the core network sends a path switch response to the target base station.
In step 4110, the core network sends a registration area update message to the terminal.
In the above embodiment, the source base station receives network slice information sent by the neighboring base station through an Xn interface, when a handover target cell is selected for the terminal, the RSRP strength and the network slice type need to be considered, a cell with the strongest RSRP is selected as a target cell in a neighboring cell supporting the network slice type, and when the terminal supports a multi-slice service, it is first ensured that the slice service with the highest priority is not interrupted, and if slice services with the same priority exist, a cell supporting the most slice types is selected as a target cell, so that continuity of the slice service is ensured, and service quality is improved.
Fig. 5 is a flowchart illustrating another embodiment of a method for maintaining slice service continuity in a cell handover scenario according to the present disclosure.
In step 510, the source base station adds neighboring cell network slice information through the core network over the Ng interface, the network slice information including a network slice type.
In step 520, the source base station sends a neighbor measurement control command to the terminal.
In step 530, the terminal reports a neighbor cell measurement report, where the measurement report includes an RSRP value of a neighbor cell.
At step 540, the source base station selects a candidate set of cells according to the RSRP value.
In step 550, a cell with the largest RSRP value among cells of the same network slice type supported by the source cell is selected as a target cell in the candidate cell set.
And if the terminal supports the multi-network slice type, selecting candidate target cells in the candidate cell set according to the priority of the network slice type supported by the terminal, and selecting the cell with the maximum RSRP value as the target cell from the candidate target cells.
And if the candidate cell set comprises candidate cells of the highest priority network slice type supported by the plurality of terminals, selecting the cell with the maximum RSRP value in the cells supporting the most network slice types as a target cell to be switched from the candidate cells with the same highest priority network slice type supported by the terminals.
In step 560, the source base station sends a handover request to the core network.
In step 570, the base station of the target cell sends a handover request to the core network.
In step 580, the core network sends a handover request response to the target base station.
In step 590, the core network sends a handover command to the source base station.
In step 5100, the terminal switches to the cell where the target base station is located.
In step 5110, the core network sends a tracking area update message to the terminal.
In the above embodiment, the source base station receives network slice information sent by the neighboring base station through the Ng interface by using the core network, when selecting a handover target cell for the terminal, the network slice type needs to be considered in addition to the RSRP strength, and a cell with the strongest RSRP is selected as a target cell in a neighboring cell supporting the network slice type.
Fig. 7 is a schematic structural diagram of an embodiment of a base station according to the present disclosure. The base station includes a network slice type acquisition unit 710, a candidate cell set selection unit 720, and a target cell determination unit 730.
The network slice type obtaining unit 710 is configured to receive network slice types supported by neighboring cell base stations of a cell in which the terminal currently resides. For example, supported network slice type information sent by a neighboring cell base station over an Xn interface may be received; or receiving network slice type information sent by the adjacent cell base station through the Ng interface by using the core network.
The candidate cell set selecting unit 720 is configured to select a candidate cell set according to reference signal received power, RSRP, values of neighboring cells. For example, the RSRP values of the neighboring cells are ranked, and cells in the neighboring cells, the RSRP of which is greater than the RSRP value of the cell in which the terminal currently resides, are used as the candidate cell set.
The target cell determining unit 730 is configured to select a cell, which has the same network slice type supported by the base station as the network slice type supported by the base station of the cell where the terminal currently resides, as the target cell to be switched in the candidate cell set, so as to switch the terminal to the target cell.
In the above embodiment, when performing terminal cell handover, the RSRP value of the neighboring cell is considered, and the network slice type supported by the base station of the neighboring cell is also considered, so as to ensure the continuity of the slice service in the handover process as much as possible.
In one embodiment, the target cell determining unit 730 is configured to select, as the target cell to be switched, a cell with the largest RSRP value in cells, of which the network slice type supported by the base station is the same as the network slice type supported by the base station of the cell in which the terminal currently resides, in the candidate cell set.
In another embodiment, the target cell determining unit 730 is further configured to select, as the target cell to be switched, a cell with the largest RSRP value among cells whose network slice types supported by the base station are the closest to the network slice type supported by the base station of the cell where the terminal currently resides, if there is no cell in the candidate cell set whose network slice type supported by the base station is the same as the network slice type supported by the base station of the cell where the terminal currently resides; and if the cell with the network slice type supported by the base station closest to the network slice type supported by the base station of the cell in which the terminal currently resides is not in the candidate cell set, selecting the cell with the maximum RSRP value in the candidate cell set as the target cell to be switched.
In the above embodiment, when the target cell to be switched is selected, the cell supporting the terminal network slicing type and having the best signal as much as possible is selected to ensure that the slicing service is not interrupted, and a protection measure is added to ensure that at least the control signaling is not interrupted when the service cannot be ensured, thereby improving the user experience.
Fig. 8 is a schematic structural diagram of another embodiment of a base station according to the present disclosure. The apparatus further includes a priority obtaining unit 810 configured to obtain priority information of network slice types supported by the terminal.
The target cell determining unit 730 is further configured to select a cell in the candidate cell set, as a candidate target cell, where the base station can support the terminal network slice type; and selecting the cell with the maximum RSRP value in the cells with the highest network slice type priority supported by the base station as the target cell to be switched.
In another embodiment, the target cell determining unit 730 is further configured to select, as the target cell to be switched, a cell with the largest RSRP value in the cells supporting the most network slice types from among the candidate cells with the same network slice types supported by the terminal, if the candidate cells include candidate cells with the same network slice types supported by the plurality of base stations and the highest priority network slice type supported by the terminal.
In the above embodiment, when selecting the target cell to be switched, under the condition that the terminal supports the multi-slice service, it is first ensured that the slice service with the highest priority is not interrupted.
Fig. 9 is a schematic structural diagram of another embodiment of the base station of the present disclosure. The base station includes a memory 910 and a processor 920, wherein: the memory 910 may be a magnetic disk, flash memory, or any other non-volatile storage medium. The memory is used to store instructions in the embodiments corresponding to fig. 1-5. Coupled to memory 910, processor 920 may be implemented as one or more integrated circuits, such as a microprocessor or microcontroller. The processor 920 is configured to execute instructions stored in a memory.
In one embodiment, as also shown in fig. 10, the base station 1000 includes a memory 1010 and a processor 1020. Processor 1020 is coupled to memory 1010 by a BUS 1030. The base station 1000 may also be coupled to an external storage device 1050 via a storage interface 1040 for facilitating retrieval of external data, and may also be coupled to a network or another computer system (not shown) via a network interface 1060, which will not be described in detail herein.
In this embodiment, the data instruction is stored in the memory, and the processor processes the instruction, so that continuity of slice service in the switching process can be ensured as much as possible.
Fig. 11 is a schematic structural diagram illustrating an embodiment of a system for maintaining continuity of slice service in a cell handover scenario according to the present disclosure. The system includes a plurality of base stations 1110 and a core network 1120, wherein the base stations 1110 include a source base station and a base station of a neighboring cell, and the core network 1120 is configured to acquire network slice information and to transfer the network slice information to the source base station.
In another embodiment, a computer-readable storage medium has stored thereon computer program instructions which, when executed by a processor, implement the steps of the method in the corresponding embodiments of fig. 1-5. As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, apparatus, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Thus far, the present disclosure has been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.
Claims (13)
1. A method for maintaining slice service continuity in a cell handover scenario, comprising:
receiving a network slice type supported by a base station of an adjacent cell of a current resident cell of a terminal;
selecting a candidate cell set according to the Reference Signal Received Power (RSRP) value of the adjacent cell;
and selecting a cell with the same network slice type supported by the base station as the network slice type supported by the base station of the cell where the terminal currently resides as a target cell to be switched in the candidate cell set so as to switch the terminal to the target cell.
2. The method of claim 1, wherein,
and selecting a cell with the maximum RSRP value in cells of which the network slice type supported by the base station is the same as the network slice type supported by the base station of the cell where the terminal currently resides as a target cell to be switched.
3. The method of claim 2, wherein,
if the candidate cell set does not have a cell with the same network slice type supported by the base station as the network slice type supported by the base station of the cell where the terminal currently resides, selecting a cell with the largest RSRP value in the cell with the closest network slice type supported by the base station and the network slice type supported by the base station of the cell where the terminal currently resides as a target cell to be switched;
And if no cell with the network slice type supported by the base station closest to the network slice type supported by the base station of the cell in which the terminal currently resides exists in the candidate cell set, selecting the cell with the maximum RSRP value in the candidate cell set as the target cell to be switched.
4. The method of claim 1, further comprising:
acquiring priority information of network slice types supported by a terminal;
selecting a cell which can support a terminal network slice type by a base station in the candidate cell set as a candidate target cell;
and selecting the cell with the maximum RSRP value in the cells with the highest network slice type priority supported by the base station from the candidate target cells as a target cell to be switched.
5. The method of claim 4, wherein,
and if the candidate cell set comprises candidate cells of which the network slice types supported by the base stations are the same as the highest priority network slice type supported by the terminal, selecting the cell with the maximum RSRP value in the cells supporting the most network slice types as a target cell to be switched from the candidate cells of which the network slice types supported by the terminal are the same as the highest priority network slice type supported by the terminal.
6. The method according to any one of claims 1 to 5,
Receiving supported network slice type information sent by an adjacent cell base station through an Xn interface; and/or
And receiving network slice type information sent by the adjacent cell base station through the Ng interface by using the core network.
7. The method according to any one of claims 1 to 5,
and taking the cell with the RSRP value larger than the RSRP value of the cell where the terminal currently resides in the adjacent cell as a candidate cell set.
8. A base station, comprising:
the network slice type acquisition unit is configured to receive a network slice type supported by a base station of an adjacent cell of a cell where the terminal currently resides;
a candidate cell set selection unit configured to select a candidate cell set according to Reference Signal Received Power (RSRP) values of neighboring cells;
and the target cell determining unit is configured to select a cell, which has the same network slice type supported by the base station as the network slice type supported by the base station of the cell where the terminal currently resides, in the candidate cell set as a target cell to be switched, so as to switch the terminal to the target cell.
9. The base station of claim 8, wherein,
the target cell determining unit is configured to select a cell with the largest RSRP value in cells, of which the network slice type supported by the base station is the same as the network slice type supported by the base station of the cell where the terminal currently resides, as a target cell to be switched.
10. The base station of claim 8 or 9, further comprising:
a priority acquisition unit configured to acquire priority information of network slice types supported by a terminal;
wherein the target cell determination unit is further configured to select, as a candidate target cell, a cell in the candidate cell set for which a base station can support a terminal network slice type; and selecting the cell with the maximum RSRP value in the cells with the highest network slice type priority supported by the base station from the candidate target cells as a target cell to be switched.
11. A base station, comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the method of any of claims 1-7 based on instructions stored in the memory.
12. A system for maintaining continuity of slicing service in a cell-switching scenario, comprising:
the base station of any one of claims 8-11; and
a core network configured to acquire the network slice information and to transfer the network slice information to the base station.
13. A computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the method of any one of claims 1 to 7.
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