CN109309939B - User terminal, mobility management method thereof, base station and readable storage medium - Google Patents
User terminal, mobility management method thereof, base station and readable storage medium Download PDFInfo
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- CN109309939B CN109309939B CN201710630239.0A CN201710630239A CN109309939B CN 109309939 B CN109309939 B CN 109309939B CN 201710630239 A CN201710630239 A CN 201710630239A CN 109309939 B CN109309939 B CN 109309939B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
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Abstract
A user terminal and a mobility management method thereof, a base station and a readable storage medium, wherein the mobility management method comprises the following steps: when attaching to a core network, acquiring a mapping relation between a network slice supported by the user terminal and a cell frequency, wherein the mapping relation is issued by the core network; determining the network slice with the highest priority corresponding to the user terminal, including: determining the priority of each network slice in the mapping relation between the network slice and the cell frequency according to the required service type of the user terminal, and acquiring the network slice with the highest priority; and residing on the cell frequency corresponding to the network slice with the highest priority. The scheme can enable the user terminal to reside in the interested service cell.
Description
Technical Field
The embodiment of the invention relates to the field of wireless communication, in particular to a user terminal, a mobility management method thereof, a base station and a readable storage medium.
Background
With the development of wireless communication technology, 5G wireless communication systems are becoming more and more practical. A concept of network slicing is introduced into a 5G system, and an operator provides different types of services for a User Equipment (UE) in different slices. Within one Tracking Area (TA), the network supported slices are unchanged.
When the idle UE performs cell reselection, the base station may specify the priority of the cell frequency through a System Information (System Information) or a Radio Resource Control (RRC) signaling, and the UE first attempts to camp on the frequency with the highest priority. However, the cell in which the UE may camp does not support the service of interest to the user.
Disclosure of Invention
The embodiment of the invention solves the problem of how the UE resides in the cell of the service which the user is interested in.
To solve the foregoing technical problem, an embodiment of the present invention provides a method for mobility management of a user equipment, including: when attaching to a core network, acquiring a mapping relation between a network slice supported by the user terminal and a cell frequency, wherein the mapping relation is issued by the core network; determining the network slice with the highest priority corresponding to the user terminal, including: determining the priority of each network slice in the mapping relation between the network slice and the cell frequency according to the required service type of the user terminal, and acquiring the network slice with the highest priority; and residing on the cell frequency corresponding to the network slice with the highest priority.
Optionally, the determining the network slice with the highest priority corresponding to the user terminal includes: and determining the priority of each network slice according to the required service type of the user terminal, at least one of the current geographical position of the user terminal and the current time period of the user terminal, and acquiring the network slice with the highest priority.
Optionally, after camping on the cell frequency corresponding to the network slice with the highest priority, the method further includes: and sending the priority information of each network slice to a base station.
Optionally, the sending the priority information of each network slice to the base station includes: and after the RRC connection is established with the base station, transmitting the priority information of each network slice to the base station through uplink RRC signaling.
Optionally, after sending the priority information of each network slice to the base station, the method further includes: and when the connection state is detected and the update of the priority information of any one of the network slices is detected, sending the updated priority information of each network slice to the base station.
Optionally, after completing attaching to the core network, the method further includes: and reporting the priority information of each network slice to the core network, so that the core network forwards the priority information of each network slice to a base station.
Optionally, the reporting of the priority information of each network slice to the core network includes: and reporting the priority information of each network slice to the core network by adopting non-access stratum signaling.
Optionally, the method for mobility management of a user equipment further includes: and when the network slices are in a connected state and the update of the priority information of any one of the network slices is detected, reporting the updated priority information of each network slice to the core network.
Optionally, the camping on the cell frequency corresponding to the network slice with the highest priority further includes: detecting whether the residence is successful; when the residence fails, selecting the network slice with the priority next to the highest priority from the network slices; camping on a cell frequency corresponding to the network slice with the priority next to the highest priority.
The embodiment of the present invention further provides a computer-readable storage medium, which is suitable for operating in a user terminal, where the user terminal communicates with a base station, and the computer-readable storage medium stores a computer instruction, where the computer instruction executes the steps of the user terminal mobility management method when running.
The embodiment of the present invention further provides a user terminal, which includes a memory and a processor, where the memory stores a computer instruction capable of running on the processor, and the computer instruction executes the steps of the user terminal mobility management method when running.
The embodiment of the invention also provides another user terminal mobility management method, which comprises the following steps: acquiring and storing priority information of each network slice corresponding to the user terminal; when the user terminal is detected to need to carry out cell switching, selecting a cell corresponding to a network slice supporting the highest priority from candidate cells as a target cell switched by the user terminal; the network slice with the highest priority is as follows: the user terminal is determined according to the type of the required service.
Optionally, the obtaining priority information of each network slice includes: and receiving and storing the priority information of each network slice sent by the user terminal.
Optionally, the obtaining priority information of each network slice includes: and receiving the priority information of each network slice, which is acquired and forwarded by the core network from the user terminal.
Optionally, the method for mobility management of a user equipment further includes: when updated priority information of each network slice is received, replacing the saved priority of each network slice with: the updated priority of each network slice.
Optionally, the updated priority information of each network slice is obtained in any one of the following manners: receiving and storing the updated priority information of each network slice sent by the user terminal; and receiving and storing the updated priority information of each network slice, which is acquired and forwarded by the core network from the user terminal.
An embodiment of the present invention provides a user terminal, including: an obtaining unit, configured to obtain, when attaching to a core network, a mapping relationship between a network slice supported by the user terminal and a cell frequency, where the mapping relationship is issued by the core network; the determining unit, which determines the network slice with the highest priority corresponding to the user terminal, includes: determining the priority corresponding to each network slice in the mapping relation between the network slice and the cell frequency according to the required service type of the user terminal, and acquiring the network slice with the highest priority; and the residing unit is used for residing on the cell frequency corresponding to the network slice with the highest priority.
Optionally, the determining unit is configured to determine the priority of each network slice according to the required service type of the user terminal, and at least one of a current geographic location of the user terminal and a current time period of the user terminal, and acquire the network slice with the highest priority.
Optionally, the user terminal further includes: and the sending unit is used for sending the priority information of each network slice to the base station.
Optionally, the sending unit is configured to send the priority information of each network slice to the base station through an uplink RRC signaling after the RRC connection is established with the base station.
Optionally, the sending unit is further configured to send the updated priority information of each network slice to the base station when it is detected that the priority information of any one of the network slices is updated.
Optionally, the user terminal further includes: and the reporting unit is used for reporting the priority information of each network slice to the core network so that the core network forwards the priority information of each network slice to the base station.
Optionally, the reporting unit is configured to report the priority information of each network slice to the core network by using a non-access stratum signaling.
Optionally, the reporting unit is further configured to report the updated priority information of each network slice to the core network when it is detected that the priority information of any one of the network slices is updated.
Optionally, the user terminal further includes: the detection unit is used for detecting whether the residence is successful; the residing unit is further configured to select, when residing fails, a network slice with a priority next to the highest priority among the network slices; camping on a cell frequency corresponding to the network slice with the priority next to the highest priority.
An embodiment of the present invention further provides a base station, including: an obtaining unit, configured to obtain and store priority information of each network slice corresponding to the user terminal; the cell selection method comprises the steps that when the user terminal is detected to need to be subjected to cell switching, a cell corresponding to a network slice supporting the highest priority is selected from candidate cells to serve as a target cell for switching of the user terminal; the network slice with the highest priority is as follows: the user terminal is determined according to the type of the required service.
Optionally, the obtaining unit is configured to receive and store the priority of each network slice in the mapping relationship between the network slice and the cell frequency, where the mapping relationship is sent by the user terminal.
Optionally, the obtaining unit is configured to receive the priority information of each network slice, which is obtained and forwarded by the core network from the user terminal.
Optionally, the base station further includes: an updating unit, configured to replace the saved priority of each network slice with: the updated priority of each network slice.
Optionally, the obtaining unit is configured to obtain the updated priority information of each network slice in any one of the following manners: receiving and storing the updated priority information of each network slice sent by the user terminal; and receiving and storing the updated priority information of each network slice, which is acquired and forwarded by the core network from the user terminal.
The embodiment of the present invention further provides a computer-readable storage medium, which is suitable for operating in a base station, where the base station communicates with a user terminal, and the computer-readable storage medium stores a computer instruction, where the computer instruction executes the steps of the user terminal mobility management method when the computer instruction runs.
The embodiment of the present invention further provides a base station, which includes a memory and a processor, where the memory stores a computer instruction capable of running on the processor, and the computer instruction executes the steps of the user terminal mobility management method when running.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
when the user terminal carries out cell residence, the network slice with the highest priority corresponding to the user terminal is selected according to the type of the required service from the mapping relation between the network slice supported by the user terminal and the cell frequency issued by the core network, and the residence on the cell frequency corresponding to the network slice with the highest priority is tried. Since the network slice with the highest priority is determined according to the required service type of the user terminal, the user terminal can camp on the cell of the service of interest.
Furthermore, the priority of each network slice in the mapping relation between the network slice and the cell frequency is determined according to the required service type of the user terminal, the current geographical position of the user terminal and at least one of the current time period of the user terminal, and the priority of the network slice can be set and adjusted more flexibly.
Further, the user terminal directly sends the priority information of each network slice to the base station, or indirectly sends the priority of each network slice to the base station through the core network, so that the base station acquires the priority of each network slice. When the cell switching is determined to be performed for the user terminal, the base station may determine a target cell to which the user terminal is switched according to the priority of each network slice, so that the user terminal can be switched to a cell of an interested service.
In addition, when the user terminal detects that the priority information of each network slice is updated, the user terminal directly informs the base station or indirectly informs the base station through the core network. The base station updates the priority of each network slice, so that the user terminal can be ensured to be always positioned in the cell of the interested service.
Drawings
Fig. 1 is a flowchart of a method for mobility management of a ue in an embodiment of the present invention;
fig. 2 is a flowchart of another method for mobility management of a ue in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a user terminal in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a base station in the embodiment of the present invention.
Detailed Description
When the idle UE performs cell reselection, the base station may specify the priority of the cell frequency through a System message (System Information) or dedicated RRC signaling, and the UE first attempts to camp on the highest priority frequency. However, the frequency priority transmitted by the base station can only reflect the service priority set by the telecom operator, but cannot reflect the service preference of the user using the UE, and therefore, the cell where the UE resides may not support the service in which the user is interested.
In the embodiment of the invention, when the user terminal performs cell residence, the network slice with the highest priority corresponding to the user terminal is selected according to the type of the required service from the mapping relation between the network slice supported by the user terminal and the cell frequency issued by the core network, and the residence on the cell frequency corresponding to the network slice with the highest priority is attempted. Since the network slice with the highest priority is determined according to the required service type of the user terminal, the user terminal can camp on the cell of the service of interest.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
An embodiment of the present invention provides a method for managing mobility of a user equipment, which is described in detail below with reference to fig. 1 through specific steps.
Step S101, when attaching to a core network, acquiring a mapping relation between a network slice supported by the user terminal and a cell frequency, wherein the mapping relation is issued by the core network.
In a specific implementation, when a user terminal attaches (attach) to a core network, the core network may send, to the user terminal, a mapping relationship between a network slice supported by the user terminal and a cell frequency. The mapping relationship between the network slices and the cell frequencies includes the identifier of the network slice and the available cell frequency corresponding to each network slice. The mapping relationship between the network slice and the cell frequency may further include a corresponding relationship between the tracking area and the mapping relationship between the network slice and the cell frequency. When the mapping relation between the network slice and the cell frequency does not include the tracking area, a certain network slice is available on the appointed frequency list in the whole network.
In practical application, the mapping relationship between the network slice and the cell frequency sent by the core network to the user terminal may be as follows: { Slice1, (Frequency1, Frequency2), (TA1, TA2) }, { Slice2, (Frequency3) }, { Slice3, (Frequency2), TA1 }. { Slice1, (Frequency1, Frequency2), (TA1, TA2) } is expressed as: the network supports network Slice1 at frequencies Frequency1 and 2 of TA1, TA2 area, TA1 being tracking area 1 and TA2 being tracking area 2. { Slice2, (Frequency3) } is expressed as: the network supports network Slice2 at the Frequency3 of all tracking area regions. { Slice3, (Frequency2), TA1} is represented as: the network supports network Slice3 at Frequency2 of the TA1 region.
And step S102, determining the network slice with the highest priority corresponding to the user terminal.
In practical applications, it is known that a network slice corresponds to a traffic type. Therefore, in the implementation, the user can set the priority of the service type in advance, thereby indirectly completing the setting of the priority of the network slice.
The user can set the priority corresponding to the service type on the user terminal, and when the priority corresponding to the service type is set, the user can set the priority of one or more service types.
For example, the most interesting demand service type of the user is Multimedia Broadcast Multicast Service (MBMS), and the more interesting demand service type is Mobile Broadband (MBB). The user can set the highest priority of the MBMS service and the second priority of the MBB service on the user terminal.
It will be appreciated that in a particular application, different users may have different types of demand services. Therefore, when setting the priority corresponding to the demand service type, the priority set by different users may be different for the same demand service type, and may be set according to the actual needs of the users.
In a specific implementation, the user may also directly set a priority for each network slice supported by the user terminal. After acquiring the mapping relationship between the network slice supported by the user terminal and the cell frequency issued by the core network, the user terminal can display the network slice in the mapping relationship between the network slice and the cell frequency on the display screen. The user can set the priority of the web slice displayed on the display screen through the touch screen.
For example, the service type corresponding to the network Slice1 is an MBMS service, the service type corresponding to the network Slice2 is an MBB service, and the service type in which the user is most interested is an MBB service. The user sets the highest priority of the network Slice2 and the second highest priority of the network Slice1 through a touch screen on the user terminal.
In a specific implementation, the user terminal may obtain a current required service type according to the detected current operation of the user, and determine a network slice with a highest priority corresponding to the user terminal according to the required service type.
For example, the highest priority of the MBB service and the second priority of the MBMS service are preset, the MBMS service corresponds to the network Slice1, and the MBB service corresponds to the network Slice 2. And when the user terminal detects that the current required service type is MBB service, determining that the priority of the network Slice2 is the highest, and determining that the priority of the network Slice1 is the second priority. At this time, the network Slice determined by the user terminal is Slice 2.
In a specific implementation, when the user sets the priority of the network slice on the user terminal, at least one of time and space limitation can be added. The temporal restriction may be to limit the set priority of the network slice to be valid only in a certain time period, and the spatial restriction may be to limit the set priority of the network slice to be valid only in a certain area. The time limit may be in days or in hours or minutes. For example, the priority of the set network slice is valid within 8:30 to 17:30 of the working day. For another example, the set network slice priority is valid within 0: 00-23: 00 of the double holidays. The spatial limitation may be a limitation of a geographical area. For example, in an area within a coverage of a certain base station, or in a certain geographical area (e.g., the purdong new area), the priority of the set network slice is valid.
When at least one of time and space is added, when the user terminal determines the network slice with the highest priority, besides the required service type of the user terminal, the priority of each network slice is determined by integrating at least one of the current geographic position and the current time period of the user terminal.
When the time limit is added, when the user terminal determines the network slice with the highest priority, the priority of each network slice is determined according to the required service type of the user terminal and the time period of the current time. When the space limit is added, when the user terminal determines the network slice with the highest priority, the priority of each network slice is determined according to the required service type of the user terminal and the current geographic position of the user terminal. When the time limit and the space limit are added at the same time, the priority of each network slice is determined according to the required service type of the user terminal, the time period of the current time and the current geographic position of the user terminal.
For example, the user is set in 8: 30-17: 30 of a working day on the user terminal, the priority of the MBMS service is highest, the priority of the MBB service is next, the MBMS service corresponds to the network Slice1, and the MBB service corresponds to the network Slice 2. When detecting that the current time is in the time period of 'friday 12: 00', the user terminal determines that the priority of the MBMS service is the highest, and therefore determines that the priority of the network Slice1 is the highest.
For another example, the user is set in 0: 00-23: 00 of a double-holiday on the user terminal, and in the coverage area of the base station a, the priority of the MBB service is highest, and the MBMS service corresponds to the network Slice1 and the MBB service corresponds to the network Slice 2. When the user terminal detects that the time period of the current time is 'saturday 12: 00' and the user terminal is in the coverage area of the base station a, the priority of the MBB service is determined to be the highest, and therefore the priority of the network Slice2 is determined to be the highest.
And step S103, residing on the cell frequency corresponding to the network slice with the highest priority.
In a specific implementation, after determining the network slice with the highest priority, the ue may attempt to camp on the cell frequency corresponding to the determined network slice with the highest priority. In practical applications, camping on the cell frequency corresponding to the determined network slice with the highest priority level means: and residing on the cell with the strongest signal strength corresponding to the cell frequency corresponding to the network slice with the highest priority.
For example, the mapping relationship between the network slice supported by the user terminal issued by the core network and the cell frequency is as follows: { Slice1, (Frequency1, Frequency2), (TA1, TA2) }, { Slice2, (Frequency3) }, { Slice3, (Frequency2), TA1 }. The network Slice with the highest priority determined by the user terminal is Slice2, and the user terminal resides on the cell Frequency 3.
When the mapping relation between the network slice issued by the core network and the cell frequency further includes a tracking area, the cell frequency where the user terminal is to reside can be determined according to the tracking area when the cell frequency is selected. When the network Slice3 has the highest priority, the user terminal resides in the cell with Frequency of Frequency2 and the strongest signal strength within TA 1.
Therefore, when the user terminal performs cell residence, the network slice with the highest priority corresponding to the user terminal is selected according to the type of the required service, and the residence on the cell frequency corresponding to the network slice with the highest priority is attempted. Since the network slice with the highest priority is determined according to the required service type of the user terminal, the user terminal can camp on the cell of the service of interest.
For example, the user presets the highest priority of MBMS service and the second priority of MBB service on the user terminal. The network Slice corresponding to the MBMS service is network Slice1, and the network Slice corresponding to the MBB service is network Slice 2. When the required service type of the user terminal is detected to be the MBMS service, it is determined that the network Slice1 has the highest priority, and the user terminal resides on the cell frequency corresponding to the network Slice1, so that the user terminal can reside in the cell of the service of interest.
When a user terminal camps on a certain cell frequency, there may be a case where the camping fails. In practical applications, it can be known that successful camping corresponding to a ue means: the signal quality of the cell measured by the UE in the camped cell exceeds a predetermined threshold, which may be set by the camped cell through system messages, and the UE can correctly receive necessary system messages, such as Master Information Block (MIB) and other important system message blocks, in the cell. When the user terminal fails to camp on the cell frequency corresponding to the network slice with the highest priority, the network slice with the priority next to the highest priority can be selected from the network slices, and the user terminal can camp on the cell frequency for the network slice pair with the priority next to the highest priority.
For example, the user sets the network Slice1 with the highest priority and the network Slice2 with the second highest priority on the user terminal. When the user terminal fails to camp on the cell frequency corresponding to the network Slice1 (for example, the signal quality of the cell corresponding to the network Slice1 is lower than a predetermined threshold), the user terminal may attempt to camp on the cell frequency corresponding to the network Slice2, so as to ensure that the user terminal can normally access to the network and realize normal functions.
When the connected user terminal performs cell switching, the switched target cell is determined by the base station. However, when determining the cell to which the ue is handed over, the base station cannot take into account the preferences of the user of the ue for different services, and therefore, the base station may hand over the ue to a cell that does not support the service in which the user is interested.
In order to enable the connected ue to switch to the cell of the service of interest, in the embodiment of the present invention, after the ue successfully camps on the cell frequency corresponding to the network slice with the highest priority, the ue may send the priority information of each network slice to the base station.
For example, the priority information of each network slice sent by the user terminal to the base station is: the network Slice1 has the highest priority, the network Slice2 has the second highest priority, and the network Slice3 has the lowest priority.
In a specific implementation, the user terminal may directly send the priority information of each network slice to the base station. In the embodiment of the present invention, after the user terminal establishes RRC connection with the base station, the user terminal may send priority information of each network slice to the base station through an uplink RRC signaling.
It can be understood that, in practical application, the user terminal may also directly send the priority information of each network slice to the base station through other signaling, which is not described herein again.
In an implementation, the user terminal may also indirectly send priority information for each network slice to the base station. In the embodiment of the present invention, after attaching to the core network, the user terminal may report the priority information of each network slice to the core network. After receiving the priority information of each network slice, the core network forwards the priority information to the base station, so that the base station can acquire the priority information of each network slice.
In this embodiment of the present invention, the ue may report the priority information of each network slice to the core network through Non-Access Stratum (NAS) signaling.
In an implementation, the priority of each network slice is not constant for the user terminal in the connected state. For example, the priority of MBB service is highest and the priority of MBMS service is second within 8: 30-17: 30 of working day; in the range of 0: 00-23: 00 of the double holidays, the priority of the MBMS is the highest, and the priority of the MBB is the next. For another example, in the coverage area of the base station a, the priority of the MBMS service is the highest, and the priority of the MBB service is the next highest; and setting the priority of the MBB service to be the highest and the priority of the MBMS service to be the next within the coverage range of the base station B.
In other words, the priorities of the network slices may change as time and space change. When the priority of any one of the network slices changes, if the base station does not know that the priority of each network slice changes, the base station may switch the user terminal to a cell that does not support the service that the user is interested in when the user terminal performs cell switching.
In the embodiment of the present invention, in order to prevent the base station from switching the user terminal to the cell that does not support the service in which the user is interested, when the user terminal detects that any priority information in each network slice is updated, the user terminal may directly send the updated priority information of each network slice to the base station, or may indirectly send the updated priority information of each network slice to the base station.
The user terminal can directly send the updated priority information of each network slice to the base station through uplink RRC signaling. The user terminal can send the updated priority information of each network slice to the core network through NAS signaling. And the core network forwards the updated priority information of each network slice to the base station.
And after receiving the updated priority information of each network slice, the base station can store the updated priority information of each network slice, and when the user terminal performs cell switching, the base station selects a target cell with the highest priority for the user terminal by adopting the updated priority information of each network slice.
The embodiment of the present invention further provides another user terminal mobility management method, which is described in detail below with reference to fig. 2 through specific steps.
Step S201, obtaining and storing the priority of each network slice corresponding to the user terminal.
In a specific implementation, referring to step S101, when a user terminal attaches (attach) to a core network, the core network may send, to the user terminal, a mapping relationship between a network slice supported by the user terminal and a cell frequency. Referring to steps S102 to S103, according to the required service type of the user terminal, the user terminal may determine the priority of each network slice in the mapping relationship between the network slice and the cell frequency. For specific contents of steps S101 to S103, reference may be made to the above embodiments, which are not described herein again.
After the user terminal establishes RRC connection with the base station, priority information of each network slice may be sent to the base station.
For example, the priority information of each network slice sent by the user terminal to the base station is: the network Slice1 has the highest priority, the network Slice2 has the second highest priority, and the network Slice3 has the lowest priority.
In a specific implementation, the user terminal may directly send the priority information of each network slice to the base station. In the embodiment of the present invention, after the user terminal establishes RRC connection with the base station, the user terminal may send priority information of each network slice to the base station through an uplink RRC signaling.
It can be understood that, in practical application, the user terminal may also directly send the priority information of each network slice to the base station through other signaling, which is not described herein again.
In an implementation, the user terminal may also indirectly send priority information for each network slice to the base station. In the embodiment of the present invention, after attaching to the core network, the user terminal may report the priority information of each network slice to the core network. After receiving the priority information of each network slice, the core network forwards the priority information to the base station, so that the base station can acquire the priority information of each network slice.
In this embodiment of the present invention, the ue may report the priority information of each network slice to the core network through Non-Access Stratum (NAS) signaling.
The base station stores the priority information of each network slice after receiving the priority information.
Step S202, when detecting that the user terminal needs to perform cell switching, selecting a cell corresponding to a network slice with the highest supporting priority from candidate cells as a target cell for switching the user terminal.
In practical applications, it is known that the ue may send a measurement report to the base station. The base station determines whether the user terminal needs to perform cell switching according to the measurement report sent by the user terminal. For example, when the base station detects that the signal of the current serving cell of the user terminal is poor and the signal of the neighboring cell is good, the base station may decide to perform cell handover on the user terminal. When the base station decides to perform cell handover on the ue, the base station may select one of the candidate cells as a target cell of the ue, and the ue is handed over from the current serving cell to the target cell.
In a specific implementation, when the base station detects that the ue needs to perform cell handover, a cell corresponding to a network slice with the highest support priority may be selected from the candidate cells as a target cell for the ue handover. In the embodiment of the present invention, the network slice with the highest priority is: and the user terminal is determined in the mapping relation between the network slice and the cell frequency according to the type of the required service.
For example, the base station learns the priority information of each network slice as follows: the network Slice1 has the highest priority, the network Slice2 has the second highest priority, and the network Slice3 has the lowest priority. When the base station determines to perform cell handover on the user terminal, the generated candidate cells include candidate cell 1, candidate cell 2, and candidate cell 3. Candidate cell 1 supports network Slice1, candidate cell 2 supports network Slice2, and candidate cell 3 supports network Slice 3. Therefore, the base station determines candidate cell 1 as the target cell for handover of the user terminal.
Therefore, when the switching target cell is selected, the base station can determine the cell switched by the user terminal according to the priority of each network slice, so that the user terminal can be switched to the cell of the interested service.
In a specific implementation, the following scenarios may also exist: in all candidate cells, there is no cell corresponding to the network slice with the highest support priority. At this time, the base station may select, from all candidate cells, a cell corresponding to a network slice having a priority next to the highest priority as a target cell for handover of the user terminal.
For example, the network Slice1 has the highest priority, the network Slice2 has the second highest priority, and the network Slice3 has the lowest priority. When the base station determines to perform cell handover on the user terminal, the generated candidate cells include candidate cell 1, candidate cell 2, and candidate cell 3. Candidate cell 1 supports network Slice3, candidate cell 2 supports network Slice2, and candidate cell 3 supports network Slice 3. Since none of candidate cell 1, candidate cell 2, and candidate cell 3 support network Slice1, the base station determines candidate cell 2 as the target cell for handover of the user terminal.
In an implementation, the priority of each network slice is not constant for the user terminal in the connected state. For example, the priority of MBB service is highest and the priority of MBMS service is second within 8: 30-17: 30 of working day; in the range of 0: 00-23: 00 of the double holidays, the priority of the MBMS is the highest, and the priority of the MBB is the next. For another example, in the coverage area of the base station a, the priority of the MBMS service is the highest, and the priority of the MBB service is the next highest; and setting the priority of the MBB service to be the highest and the priority of the MBMS service to be the next within the coverage range of the base station B.
In other words, the priorities of the network slices may change as time and space change. When the priority of any one of the network slices changes, if the base station does not know that the priority of the network slice changes, the base station may switch the user terminal to a cell that does not support the service that the user is interested in when the user terminal performs cell switching.
In the embodiment of the present invention, in order to prevent the base station from switching the user terminal to the cell that does not support the service in which the user is interested, when the user terminal detects that any priority information in each network slice is updated, the user terminal may directly send the updated priority information of each network slice to the base station, or may indirectly send the updated priority information of each network slice to the base station.
The user terminal can directly send the updated priority information of each network slice to the base station through uplink RRC signaling. The user terminal can send the updated priority information of each network slice to the core network through NAS signaling. And the core network forwards the updated priority information of each network slice to the base station.
And after receiving the updated priority information of each network slice, the base station can store the updated priority information of each network slice, and when the user terminal performs cell switching, the base station selects a target cell with the highest priority for the user terminal by adopting the updated priority information of each network slice.
When the user terminal detects that the priority information of each network slice is updated, the user terminal directly informs the base station or indirectly informs the base station through a core network. The base station updates the priority of each network slice, so that the user terminal can be ensured to be always positioned in the cell of the interested service.
Referring to fig. 3, an embodiment of the present invention provides a user terminal, including: an obtaining unit 301, a determining unit 302, and a residing unit 303, wherein:
an obtaining unit 301, configured to obtain, when attaching to a core network, a mapping relationship between a network slice supported by the user terminal and a cell frequency, where the mapping relationship is issued by the core network;
the determining unit 302 is configured to determine the network slice with the highest priority corresponding to the user terminal, and includes: determining the priority corresponding to each network slice in the mapping relation between the network slice and the cell frequency according to the required service type of the user terminal, and acquiring the network slice with the highest priority;
a camping unit 303, configured to camp on the cell frequency corresponding to the network slice with the highest priority.
In a specific implementation, the determining unit 302 may be configured to determine the priority of each network slice according to the required service type of the user terminal, and at least one of the current geographic location of the user terminal and the current time period of the user terminal, and acquire the network slice with the highest priority.
In a specific implementation, the user terminal 30 may further include: a sending unit 304, configured to send the priority information of each network slice to a base station.
In a specific implementation, the sending unit 304 may be configured to send the priority information of each network slice to the base station through uplink RRC signaling after establishing RRC connection with the base station.
In a specific implementation, the sending unit 304 may be further configured to send, to the base station, the updated priority information of each network slice when it is detected that the priority information of any one of the network slices is updated.
In a specific implementation, the ue may further include: a reporting unit (not shown in fig. 3), configured to report the priority information of each network slice to the core network, so that the core network forwards the priority information of each network slice to a base station.
In a specific implementation, the reporting unit may be configured to report the priority information of each network slice to the core network by using a non-access stratum signaling.
In a specific implementation, the reporting unit may be further configured to report the updated priority information of each network slice to the core network when it is detected that the priority information of any one of the network slices is updated.
In a specific implementation, the ue may further include: a detecting unit (not shown in fig. 3) for detecting whether the camping is successful; the residing unit 303 may be further configured to select, when the residing fails, a network slice with a priority next to the highest priority from the network slices; camping on a cell frequency corresponding to the network slice with the priority next to the highest priority.
Referring to fig. 4, an embodiment of the present invention further provides a base station 40, including: an acquisition unit 401 and a configuration unit 402, wherein:
an obtaining unit 401, configured to obtain and store priority information of each network slice corresponding to the user terminal;
a configuration unit 402, configured to select, when it is detected that the ue needs to perform cell handover, a cell corresponding to a network slice with the highest support priority from candidate cells as a target cell for handover of the ue; the network slice with the highest priority is as follows: the user terminal is determined according to the type of the required service.
In a specific implementation, the obtaining unit 401 may be configured to receive and store the priority of each network slice sent by the user terminal.
In a specific implementation, the obtaining unit 401 may be configured to receive priority information of each network slice, which is obtained and forwarded by a core network from a user terminal.
In a specific implementation, the base station 40 may further include: an updating unit 403, configured to, when receiving the updated priority information of each network slice, replace the saved priority of each network slice with: the updated priority of each network slice.
In a specific implementation, the obtaining unit 401 may be configured to obtain the updated priority information of each network slice by using any one of the following manners: receiving and storing the updated priority information of each network slice sent by the user terminal; and receiving and storing the updated priority information of each network slice, which is acquired and forwarded by the core network from the user terminal.
The embodiment of the present invention further provides a computer-readable storage medium, which is suitable for operating in a user terminal, where the user terminal communicates with a base station, and the computer-readable storage medium stores a computer instruction, where the computer instruction executes the steps of the user terminal mobility management method provided in any of the above embodiments when the computer instruction runs.
The embodiment of the present invention further provides another computer-readable storage medium, which is adapted to operate in a base station, where the base station communicates with a user terminal, and the computer-readable storage medium stores computer instructions, and the computer instructions execute, when executed, the steps of the user terminal mobility management method provided in any of the above embodiments.
The embodiment of the present invention provides another user terminal, which includes a memory and a processor, where the memory stores a computer instruction capable of running on the processor, and the computer instruction executes the steps of the user terminal mobility management method when running.
The embodiment of the present invention further provides another base station, which includes a memory and a processor, where the memory stores a computer instruction capable of running on the processor, and the computer instruction executes the steps of the user terminal mobility management method when running.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by instructing the relevant hardware through a program, which may be stored in a computer-readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (26)
1. A method for managing mobility of a user terminal is characterized by comprising the following steps:
when attaching to a core network, acquiring a mapping relation between a network slice supported by the user terminal and a cell frequency, wherein the mapping relation is issued by the core network;
determining the network slice with the highest priority corresponding to the user terminal, including: determining the priority of each network slice in the mapping relation between the network slice and the cell frequency according to the required service type of the user terminal, and acquiring the network slice with the highest priority;
residing on the cell frequency corresponding to the network slice with the highest priority;
sending the priority information of each network slice to a base station, so that the base station selects a cell corresponding to a network slice supporting the highest priority as a target cell for switching the user terminal from candidate cells when detecting that the user terminal needs to perform cell switching;
and when the connection state is detected and the update of the priority information of any one of the network slices is detected, sending the updated priority information of each network slice to the base station.
2. The method for managing mobility of a ue according to claim 1, wherein the determining the network slice with the highest priority corresponding to the ue further comprises:
and determining the priority of each network slice according to the required service type of the user terminal, at least one of the current geographical position of the user terminal and the current time period of the user terminal, and acquiring the network slice with the highest priority.
3. The method for managing mobility of a ue according to claim 1, wherein the sending the priority information of each network slice to the base station comprises:
and after the RRC connection is established with the base station, transmitting the priority information of each network slice to the base station through uplink RRC signaling.
4. The user terminal mobility management method of claim 1, further comprising, after completing the attachment to the core network:
and reporting the priority information of each network slice to the core network, so that the core network forwards the priority information of each network slice to a base station.
5. The method for managing mobility of a ue according to claim 4, wherein the reporting the priority information of each network slice to the core network comprises:
and reporting the priority information of each network slice to the core network by adopting non-access stratum signaling.
6. The user terminal mobility management method of claim 5, further comprising:
and when the network slices are in a connected state and the update of the priority information of any one of the network slices is detected, reporting the updated priority information of each network slice to the core network.
7. The method for managing mobility of a user equipment according to claim 1, wherein the camping is performed on the cell frequency corresponding to the network slice with the highest priority, further comprising:
detecting whether the residence is successful;
when the residence fails, selecting the network slice with the priority next to the highest priority from the network slices;
camping on a cell frequency corresponding to the network slice with the priority next to the highest priority.
8. A method for managing mobility of a user terminal is characterized by comprising the following steps:
the base station acquires and stores the priority information of each network slice corresponding to the user terminal; the priority information of each network slice corresponding to the user terminal is determined by the user terminal;
when the base station detects that the user terminal needs to perform cell switching, selecting a cell corresponding to a network slice supporting the highest priority from candidate cells as a target cell for switching the user terminal; the network slice with the highest priority is as follows: the user terminal is determined according to the type of the required service;
when updated priority information of each network slice is received, replacing the saved priority of each network slice with: the updated priority of each network slice.
9. The method for managing mobility of a ue according to claim 8, wherein the obtaining the priority information of each network slice includes:
and receiving and storing the priority information of each network slice sent by the user terminal.
10. The method for managing mobility of a ue according to claim 8, wherein the obtaining the priority information of each network slice includes:
and receiving the priority information of each network slice, which is acquired and forwarded by the core network from the user terminal.
11. The method for managing mobility of a ue according to claim 8, wherein the updated priority information of each network slice is obtained by any one of the following methods:
receiving and storing the updated priority information of each network slice sent by the user terminal;
and receiving and storing the updated priority information of each network slice, which is acquired and forwarded by the core network from the user terminal.
12. A user terminal, comprising:
an obtaining unit, configured to obtain, when attaching to a core network, a mapping relationship between a network slice supported by the user terminal and a cell frequency, where the mapping relationship is issued by the core network;
the determining unit, which determines the network slice with the highest priority corresponding to the user terminal, includes: determining the priority corresponding to each network slice in the mapping relation between the network slice and the cell frequency according to the required service type of the user terminal, and acquiring the network slice with the highest priority;
a residing unit, configured to reside on a cell frequency corresponding to the network slice with the highest priority;
a sending unit, configured to send priority information of each network slice to a base station, so that when the base station detects that the user terminal needs to perform cell handover, a cell corresponding to a network slice with a highest support priority is selected from candidate cells as a target cell for handover of the user terminal; and when detecting that the priority information of any one of the network slices is updated, sending the updated priority information of each network slice to the base station.
13. The ue of claim 12, wherein the determining unit is configured to determine the priority of each network slice according to a required service type of the ue and at least one of a current geographic location and a current time period of the ue, and obtain the network slice with the highest priority.
14. The user terminal of claim 12, wherein the sending unit is configured to send the priority information of each network slice to the base station through uplink RRC signaling after RRC connection is established with the base station.
15. The user terminal of claim 12, further comprising: and the reporting unit is used for reporting the priority information of each network slice to the core network so that the core network forwards the priority information of each network slice to the base station.
16. The ue of claim 15, wherein the reporting unit is configured to report the priority information of each network slice to the core network by using non-access stratum signaling.
17. The ue of claim 16, wherein the reporting unit is further configured to report the updated priority information of each network slice to the core network when detecting that the priority information of any one of the network slices is updated.
18. The user terminal of claim 12, further comprising: the detection unit is used for detecting whether the residence is successful; the residing unit is further configured to select, when residing fails, a network slice with a priority next to the highest priority among the network slices; camping on a cell frequency corresponding to the network slice with the priority next to the highest priority.
19. A base station, comprising:
the acquisition unit is used for acquiring and storing the priority information of each network slice corresponding to the user terminal; the priority information of each network slice corresponding to the user terminal is determined by the user terminal;
a configuration unit, configured to select, from candidate cells, a cell corresponding to a network slice supporting the highest priority as a target cell for handover of the user terminal when it is detected that the user terminal needs to perform cell handover; the network slice with the highest priority is as follows: the user terminal is determined according to the type of the required service;
an updating unit, configured to replace the saved priority of each network slice with: the updated priority of each network slice.
20. The base station of claim 19, wherein the obtaining unit is configured to receive and store the priorities of the network slices sent by the ue.
21. The base station of claim 19, wherein the obtaining unit is configured to receive the priority information of each network slice, which is obtained and forwarded by a core network from a user terminal.
22. The base station of claim 19, wherein the obtaining unit is configured to obtain the updated priority information of each network slice in any one of the following manners: receiving and storing the updated priority information of each network slice sent by the user terminal; and receiving and storing the updated priority information of each network slice, which is acquired and forwarded by the core network from the user terminal.
23. A computer-readable storage medium adapted to run on a user terminal, the user terminal communicating with a base station, the computer-readable storage medium having a computer program stored thereon, the computer program, when being executed by a processor, performing the steps of the user terminal mobility management method according to any one of claims 1 to 7.
24. A computer-readable storage medium adapted to run on a base station communicating with a user terminal, the computer-readable storage medium having a computer program stored thereon, the computer program, when being executed by a processor, performing the steps of the user terminal mobility management method according to any one of claims 8 to 11.
25. A user terminal comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, wherein the computer program when executed performs the steps of the user terminal mobility management method of any of claims 1 to 7.
26. A base station comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, wherein the computer program when executed performs the steps of the user terminal mobility management method of any of claims 8 to 11.
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