CN114423096A - Network slice PDU session number quota management method and system - Google Patents
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Abstract
The present disclosure relates to a method and a system for managing network slice PDU session number quota, wherein the method comprises the following steps: the high-layer NF unit stores the maximum PDU session number quota supported by the network slice, and distributes the PDU session number quota of the network slice to a plurality of low-layer NF units respectively; the lower layer NF unit obtains the PDU conversation number quota of the distributed network slice from the higher layer NF unit, stores the local quota which is the PDU conversation number of the network slice, and respectively informs a plurality of local PCF units; and when the UE requests to establish or release the PDU session in the network slice, the local PCF unit carries out corresponding processing according to the local quota of the PDU session number notified by the lower NF unit.
Description
Technical Field
The present disclosure relates to the field of communications. More particularly, the present disclosure relates to network slice PDU session number quota management methods and systems.
Background
As communication technology evolves, the future-oriented Fifth-Generation mobile communication (5G) technology is becoming increasingly popular as the latest Generation cellular mobile communication technology. In a 5G mobile communication architecture, a concept of Network Slice (NS) is newly introduced as a key characteristic of a system to cope with differences of Network performance requirements of different communication services.
A network slice is a logical network that can provide a particular network function, satisfy a particular service, and meet different user needs, and includes a collection of network function modules and resources needed to complete a particular function or service. More specifically, the Network slice virtualizes a plurality of different logical networks on a unified Network infrastructure by using a virtualization technology, and may be a complete end-to-end Network including a terminal, AN Access Network (AN), a Transport Network (TN), a Core Network (Core Network, CN), and AN application server, which can provide a complete communication service. Of course, the network slice may also be a partial combination of the terminal, the AN, the TN, the CN and the application server.
In the prior art, there are many new problems to be solved in the application scenario related to network slicing. For the management of the maximum PDU (Protocol Data Unit) session quota supported by network slice, there is no standard network solution in the world currently, and the standardization work of the third Generation Partnership Project 3GPP (3rd Generation Partnership Project) is still in progress. For example, in the 3GPP R17 research report TR23.700-40, a corresponding requirement has been explicitly proposed for how to manage the maximum PDU session number quota supported by a network slice. Therefore, how to implement the related management of the maximum PDU session number quota related to the network slice becomes a new problem to be solved at present.
Disclosure of Invention
In view of the lack of a Network solution for how to manage the maximum PDU session number quota supported by a Network slice, the present disclosure aims to provide a method and a system for managing a Network slice PDU session number quota, in which a slice quota management Function is newly added through a hierarchical NF (Network Function) deployment architecture, thereby solving a management problem for the maximum PDU session number quota supported by a Network slice.
The following presents a simplified summary of the disclosure in order to provide a basic understanding of some aspects of the disclosure. However, it should be understood that this summary is not an exhaustive overview of the disclosure. It is not intended to limit the critical or important parts of the present disclosure, nor is it intended to limit the scope of the present disclosure. Its sole purpose is to present some concepts of the disclosure in a simplified form as a prelude to the more detailed description that is presented later.
According to one aspect of the present disclosure, a method of network slice PDU session number quota management is provided. The method can comprise the following steps: a session number quota allocation step, wherein a high-layer NF unit stores the maximum PDU session number quota supported by a network slice, and allocates the PDU session number quota of the network slice to each low-layer NF unit of a plurality of low-layer NF units; a session quota acquiring step, in which a lower layer NF unit acquires a PDU session quota of an allocated network slice from a higher layer NF unit, stores a local quota which is a PDU session number of the network slice, and notifies the local quota of the PDU session number to each local PCF unit of a plurality of local PCF (Policy Control Function) units; and a session number management step, in which, when a User Equipment (UE) (user Equipment) requests to establish or release a PDU session in the network slice, the local PCF unit performs corresponding processing according to the local quota of the PDU session number notified by the lower NF unit.
According to another aspect of the present disclosure, there is provided a network slice PDU session number quota management system, which may include: the high-layer NF unit stores the maximum PDU session number quota supported by the network slice and distributes the PDU session number quota of the network slice to each low-layer NF unit of the plurality of low-layer NF units; the lower-layer NF unit acquires the PDU session number quota of the distributed network slice from the higher-layer NF unit, stores the local quota which is used as the PDU session number of the network slice, and informs each local PCF unit of the plurality of local PCF units of the local quota of the PDU session number; and the local PCF unit is used for carrying out corresponding processing according to the local quota of the PDU session number notified by the lower NF unit when the UE requests to establish or release the PDU session in the network slice.
According to yet another aspect of the present disclosure, a computer-readable storage medium is provided. The computer-readable storage medium stores executable instructions that, when executed by an information processing apparatus, cause the information processing apparatus to perform the above-described network slice PDU session number quota management method.
According to still another aspect of the present disclosure, there is provided an electronic device including: a memory, and a processing circuit configured to perform the network slice PDU session number quota management method described above.
According to the method and the device, under the scene of PDU session number quota management aiming at the network slice, the existing network can be based on a two-stage NF deployment architecture, on the basis of not changing the existing network architecture and processing flow in a large scale, the existing network is subjected to function enhancement, the network slice PDU session number quota is obtained, and the limitation management of the network slice PDU session number quota is executed, so that the problems in various management aspects of storage, obtaining, distribution, limitation, updating and the like of the network slice PDU session number quota are conveniently and inexpensively solved.
Drawings
Fig. 1 is an exemplary diagram illustrating a network slice PDU session number quota management system 100 based on a two-level NF architecture according to an embodiment of the present disclosure;
fig. 2 illustrates an exemplary flow diagram of a network slice PDU session number quota management method 200 according to an embodiment of the present disclosure;
fig. 3 shows an exemplary flowchart of a detailed process of the session number management step S230 of the network slice PDU session number quota management method 200 according to an embodiment of the present disclosure;
fig. 4 illustrates a specific implementation process of a network slice PDU session establishment procedure in a network slice PDU session number quota management method according to an embodiment of the present disclosure;
fig. 5 shows a specific implementation process of a network slice PDU session release flow in a network slice PDU session number quota management method according to an embodiment of the present disclosure.
Detailed Description
Preferred embodiments of the present disclosure will be described in detail below 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, 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 and are intended to be part of the specification where appropriate. The techniques of this disclosure can be applied to a variety of products.
For convenience of understanding and explanation, as a network slice PDU session number quota management system according to an embodiment of the present disclosure, a communication system based on a two-stage NF architecture is taken as an example to describe a network slice PDU session number quota management method according to an embodiment of the present disclosure, but this is not limiting, and a network slice PDU session number quota management method according to an embodiment of the present disclosure may also be performed in a communication system having more than two stages of NF architectures, which may be performed by any two-stage NF units in the communication system having more than two stages of NF architectures, for example. Hereinafter, the "network slice" may be simply referred to as "slice".
For convenience of explanation, the present disclosure mainly takes a 5G network architecture as an example, but the technology of the present disclosure may be applied to any general network architecture, for example, any existing network architecture, or a network architecture of a future communication system.
For example, the upper layer NF unit and the lower layer NF unit included in the 5G mobile network architecture as an application background in the present disclosure may include, for example, an upper layer NRF (network element Repository Function) as the upper layer NF unit, and the lower layer NF unit may include, for example, a lower layer NRF. As a newly introduced function in a 5G architecture, NRF can be used for NF registration, management, and state detection, for example, to implement automated management of all NFs; when each NF is started, it must register with the NRF to provide services, the registration information including, for example, NF type, address, service list, etc. The two-stage NF architecture is merely exemplary and not limiting, and may be any other network architecture similar or corresponding to the one with network storage function.
Hereinafter, the overall configuration of the communication system according to the embodiment of the present disclosure will be described. Fig. 1 illustrates an exemplary schematic diagram of a network slice PDU session number quota management system 100 based on a two-level NF architecture according to an embodiment of the present disclosure. The network slice PDU session number quota management system 100 mainly includes: a two-stage NF architecture, shown by a dashed box, including a higher-level NF unit 110 and a plurality of lower-level NF units 120 (shown as 120-1, 120-2, … …, 120-n, respectively); and a plurality of local PCF units 130 (shown as 130-1, … …, 130-n, respectively) under the lower NF unit 120. Here, for the sake of simplicity, a plurality of user equipments UE interacting with each local PCF unit 130 via, for example, SMF (Session Management Function) or the like are not shown.
As illustrated in fig. 1, a network slice PDU session number quota management system 100 according to an embodiment of the present disclosure may include: the upper layer NF unit 110 is used for storing the maximum PDU session number quota supported by the network slice and distributing the PDU session number quota of the network slice to each lower layer NF unit (120-1, 120-2, … …, 120-n) of the plurality of lower layer NF units 120; a lower NF unit 120, which obtains the PDU session number quota of the allocated network slice from the higher NF unit 110, stores the local quota as the PDU session number of the network slice, and notifies each local PCF unit (130-1, … …, 130-n) of the plurality of local PCF units 130 of the local quota of the PDU session number; and a local PCF unit 130, which performs corresponding processing according to the local quota of the PDU session number notified by the lower NF unit 120 when the UE requests to establish or release the PDU session in the network slice.
The network slice PDU session number quota management system 100 according to the embodiment of the present disclosure is provided for the requirement of the existing network slice-related maximum PDU session number quota management, wherein a slice quota management function is added to the existing NF units (110, 120) and PCF unit 130 by enhancing the existing NF units (110, 120) and PCF unit 130 based on, for example, the existing network two-stage NF (such as NRF) deployment architecture. Specifically, the upper NF unit 110 stores and controls the total PDU session number quota for signing the slice, and uniformly allocates the PDU session number quota to each lower NF unit 120 as needed, for example, and may also reserve a part of the PDU session number quota as a dynamically allocated quota; each low-layer NF unit 120 stores and notifies the local PCF130 of the local quota for the number of signed PDU sessions for the slice; when the UE establishes or releases the PDU session in a slice, the local PCF unit 130 performs corresponding processing according to the notified local quota of the number of PDU sessions. More specifically, when the UE establishes a new PDU session in a slice, the local PCF unit 130 determines whether to allow or deny the establishment of the PDU session according to the local slice quota; when the number of the established slice PDU sessions reaches a local quota, the local PCF unit can report to the NF units (110, 120) and request a new quota increase, or refuse to establish a new PDU session; when the user equipment UE initiates a PDU session release request in a slice, the local PCF130 updates the number of PDUs in the slice accordingly.
According to an embodiment of the present disclosure, the higher layer NF unit may be, for example, a backbone NRF unit under a 5G communication architecture, and the lower layer NF unit may be, for example, a provincial NRF unit under the 5G communication architecture. And existing interfaces are provided between each NRF unit and the PCF unit. Therefore, the problems in management aspects such as storage, acquisition, distribution, limitation, updating and the like of the session number quota of the network slice PDU can be solved based on the existing network two-stage NF deployment architecture without large-scale transformation. When 5G network slices are deployed, for example, the 5G network slice resources can be flexibly managed.
The network slice PDU session number quota management system 100 according to the embodiments of the present disclosure is applicable at least to all scenarios of 5G network slice data traffic. In addition, because of the hierarchical NF architecture based on the existing network of the operator, the hardware aspect does not need to be changed; the method can be realized only by software upgrading, namely, the management function of slice quota is added to the NF unit and the PCF unit, the equipment is slightly modified, and the method can be implemented conveniently and at low cost.
Next, a network slice PDU session number quota management method according to an embodiment of the present disclosure is explained. Fig. 2 is an exemplary flow diagram illustrating a network slice PDU session number quota management method 200 according to an embodiment of the present disclosure. Preferably, this embodiment can be implemented in the network slice PDU session number quota management system 100 of the present disclosure. The method may comprise the steps of:
session number quota allocating step S210: the higher layer NF unit 110 stores the maximum PDU session number quota supported by the network slice, and allocates a PDU session number quota of the network slice to each lower layer NF unit (120-1, 120-2, … …, 120-n) of the plurality of lower layer NF units 120;
session number quota obtaining step S220: the lower NF unit 120 obtains the PDU session number quota of the allocated network slice from the higher NF unit 110, stores the local quota as the PDU session number of the network slice, and notifies each local PCF unit (130-1, … …, 130-n) of the plurality of local PCF units 130 of the local quota of the PDU session number; and
session number management step S230: when the UE requests to establish or release the PDU session in the network slice, the local PCF unit 130 performs corresponding processing according to the local quota of the PDU session number notified by the lower NF unit 120.
Thus, various kinds of management such as storage, acquisition, distribution, restriction, update, and the like of the session number quota of the network slice PDU can be performed conveniently and at low cost.
In step S210, the higher layer NF unit 110 may reserve a part of the PDU session number quota in the maximum PDU session number quota of the network slice as the dynamically allocated PDU session number quota.
The following further describes the detailed processing of the session number management step S230. Fig. 3 shows an exemplary flowchart of a detailed process of the session number management step S230 of the network slice PDU session number quota management method 200 according to an embodiment of the present disclosure. Wherein (a) in fig. 3 shows the session number management process in the slice PDU session establishment flow, and (B) in fig. 3 shows the session number management process in the slice PDU session release flow.
As shown in fig. 3 (a), preferably, when the user equipment UE requests to establish a new PDU session in the network slice, the local PCF unit 130 performs corresponding processing according to whether the number of established PDU sessions of the network slice reaches the local quota of the number of PDU sessions.
More specifically, in step S301, when the user equipment UE initiates a PDU session setup request for a slice, the process proceeds to step S302, and the local PCF unit determines whether the total number of established slice PDU sessions has reached the local quota.
Preferably, when the local PCF unit 130 determines that the number of established PDU sessions has not reached the local quota of the number of PDU sessions, the UE is allowed to establish a new PDU session in the network slice, and update the number of existing PDU sessions in the network slice.
More specifically, when the determination result in step S302 is no, the process proceeds to step S303, and the local PCF unit 130 adds 1 to the number of PDU sessions of the slice, and allows the user equipment UE to establish a new PDU session in the slice.
Preferably, when the local PCF unit 130 determines that the established PDU session number has reached the local quota of the PDU session number, the lower NF unit 120 reports to the higher NF unit 130 and inquires whether there is a reserved PDU session number quota, so as to request a new local quota for the PDU session number; more preferably, when the higher layer NF unit does not have a reserved PDU session number quota, the local PCF unit rejects the user equipment UE to establish a new PDU session in the network slice; when the upper layer NF unit has a reserved PDU conversation number quota, the upper layer NF unit dynamically distributes a part of the reserved PDU conversation number quota to a network slice of a requesting lower layer NF unit, the newly increased PDU conversation number quota is notified to a local PCF unit through the lower layer NF unit, the local PCF unit updates the local quota of the PDU conversation number of the network slice, and the user equipment UE is allowed to establish a new PDU conversation in the network slice and update the existing PDU conversation number of the network slice.
More specifically, when the determination result in step S302 is yes, the process proceeds to step S304, and the local PCF unit 130 reports to the higher-layer NF unit 110 via the lower-layer NF unit 120, and queries whether there is a reserved PDU session number quota; when the determination result in step S304 is negative, the process proceeds to step S305, and notifies the user equipment UE that there is no reserved quota, and the local PCF unit rejects the PDU session establishment request of the user equipment UE; when the determination result in step S304 is yes, the process proceeds to step S306, the local PCF unit 130 is notified of the new PDU session count quota through the lower NF unit 120, and a process of allowing the new PDU session and the PDU session count update similar to that in step S303 is performed.
On the other hand, as shown in fig. 3 (B), preferably, when the user equipment UE requests to release an existing PDU session in the network slice, the local PCF unit 130 updates the number of existing PDU sessions in the network slice. More specifically, when the user equipment UE initiates a PDU session release request for a slice in step S307, the process proceeds to step S308, and the local PCF unit 130 subtracts 1 from the number of PDU sessions for the slice.
Therefore, various management steps such as storage, acquisition, distribution, limitation, updating and the like of the session number quota of the network slice PDU are realized.
Next, as a specific implementation process, fig. 4 and fig. 5 show an exemplary schematic diagram of a specific implementation process of the network slice PDU session number quota management method in a communication architecture according to an embodiment of the present disclosure, where fig. 4 shows a specific implementation process of a network slice PDU session establishment procedure, and fig. 5 shows a specific implementation process of a network slice PDU session release procedure. As described above, as a premise, the higher layer NF unit 110 allocates the PDU session number quota of the slice to each lower layer NF unit 120, and the lower layer NF unit 120 notifies the corresponding local PCF unit 130. When User Equipment (UE) requests to establish a new PDU session, local PCF unit 130 verifies the slice PDU session number quota, and if local PCF unit 130 determines that it is necessary or the PDU session number quota is not enough, it can report and apply for a newly added PDU session number quota.
First, as shown in fig. 4, a specific implementation procedure of the slice PDU session establishment procedure may include:
step S401: the user equipment UE initiates a PDU session establishment processing request to a session management function unit SMF by using a parameter S-NSSAI (Single Network Slice Selection Assistant Information);
step S402: the SMF sends a session management Policy Association Establishment Request (SM Policy Association Establishment Request) to the local PCF unit 130;
step S403: local PCF unit 130 checks the slice PDU session number quota, i.e. calculates whether the number of existing PDU sessions has reached the slice local quota;
step S404: when necessary or the PDU session number quota is not sufficient, the local PCF unit 130 sends a slice PDU session number quota request to the lower NF unit 120, where the message includes parameters such as S-NSSAI, requested quota number, and the like;
step S405: the lower NF unit 120 further sends a slice PDU session number quota request to the higher NF unit 110;
step S406: under the condition of reserved quota, aiming at the slice PDU session number quota request, the high-layer NF unit 110 returns a slice PDU session number quota response to the low-layer NF unit 120, and the message comprises parameters such as S-NSSAI, authorized quota number and the like;
step S407: the lower NF unit 120 further returns a slice PDU session number quota response to the local PCF unit 130;
step S408: local PCF unit 130 updates the number of existing PDU sessions (plus 1) and the slice local quota according to the received slice PDU session number quota response;
step S409: the local PCF unit 130 returns a session management Policy Association Establishment Request Response (SM Policy Association Establishment Request Response) to the SMF;
step S410 a: the SMF allows the user equipment UE to establish a PDU Session (PDU Session initiation Accept) according to the received Session management strategy association Establishment request response; or
Step S410 b: under the condition that the PDU Session number quota is not enough, the SMF refuses the user equipment UE to establish the PDU Session (PDU Session Establishment request) according to the received Session management strategy association Establishment request response.
The method for managing the session number quota of the network slice PDU according to the embodiment of the present disclosure is mainly embodied in the steps S403 to S408. As an implementation manner and means, if in the 5G architecture, the existing service interface process, such as signaling exchanged between PCF and NRF, may be utilized, and corresponding parameters, such as slice identifier S-NSSAI, requested/authorized quota number, etc., are newly added therein; or if under other communication architectures, a newly added slice quota request/response servitization message may be adopted.
On the other hand, as shown in fig. 5, the specific implementation process of the slice PDU session release procedure includes:
step S501: the UE initiates a PDU Session Release Request (PDU Session Release Request) to the SMF by using a parameter S-NSSAI for example;
step S502: the SMF sends a session management Policy Association Termination Request (SM Policy Association Termination Request) to the home PCF unit 130;
step S503: the local PCF unit 130 updates the number of existing PDU sessions (minus 1) according to the received session management policy association termination request;
step S504: the home PCF unit 130 sends a session management Policy Association Termination Response (SM Policy Association Termination Response) to the SMF;
step S505: and the SMF sends a PDU Session Release acknowledgement (PDU Session Release Ack) to the UE according to the received Session management strategy association termination response.
The method for managing the session number quota of the network slice PDU according to the embodiment of the present disclosure is mainly embodied in the step S503. That is, when the user equipment UE initiates a PDU session release in a slice, the local PCF unit 130 will reduce the corresponding number of slice PDU sessions by 1.
As described above, according to the method and system for managing session quota of network slice PDU of the embodiments of the present disclosure, the problem of session quota management of network slice PDU can be easily and effectively solved. In the prior art, the maximum number of PDU sessions supported is generally for a certain network system dimension or a certain network device dimension, while the present disclosure is directed to network slice dimensions. According to the embodiment of the disclosure, the management of the session number quota of the network slice PDU by adopting the existing layered NF deployment architecture of the existing network is realized, and the specific problem of the management of the network slice quota is effectively solved; when the 5G network slice is deployed in the future, the 5G network slice resources can be effectively and flexibly managed.
Further, in an existing or future similar network architecture, as long as a layered NF deployment architecture can be adopted, the network slice PDU session number quota management method and system according to the embodiments of the present disclosure can be applied.
In some embodiments, network element elements such as higher layer NF unit 110, lower layer NF unit 120, and local PCF unit 130 may include memory and processing circuitry (not shown). The processing circuitry of each network element may provide various functions that it possesses.
In some embodiments, there is provided a computer-readable storage medium storing executable instructions that, when executed by an information processing apparatus, cause the information processing apparatus to perform a network slice PDU session number quota management method according to an embodiment of the present disclosure, that is, a session number quota allocating step S210, a session number quota acquiring step S220, a session number managing step S230, and the like.
In some embodiments, there is provided an electronic device comprising: a memory, and a processing circuit configured to execute the network slice PDU session number quota management method of the embodiments of the present disclosure, namely, a session number quota allocating step S210, a session number quota acquiring step S220, a session number managing step S230, and the like.
Processing circuitry may refer herein to various implementations of digital circuitry, analog circuitry, or mixed-signal (a combination of analog and digital) circuitry that perform functions in a computing system. The processing circuitry may include, for example, circuitry such as an Integrated Circuit (IC), an Application Specific Integrated Circuit (ASIC), portions or circuits of an individual processor core, an entire processor core, an individual processor, a programmable hardware device such as a Field Programmable Gate Array (FPGA), and/or a system including multiple processors. The memory may store information generated by the processing circuitry as well as programs and data for operation of the electronic device. The memory may be volatile memory and/or non-volatile memory. For example, memory may include, but is not limited to, Random Access Memory (RAM), Dynamic Random Access Memory (DRAM), Static Random Access Memory (SRAM), Read Only Memory (ROM), and flash memory.
It should be understood that the above steps, units and the like are only logic modules divided according to the specific functions realized by the steps, units and the like, and are not used for limiting the specific implementation manner. In actual implementation, the above units may be implemented as separate physical entities, or may also be implemented by a single entity (e.g., a processor (CPU or DSP, etc.), an integrated circuit, etc.).
It should be appreciated that reference throughout this specification to "an embodiment" or similar language means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. Thus, appearances of the phrases "in embodiments of the present disclosure" and similar language throughout this specification do not necessarily all refer to the same embodiment.
One skilled in the art will appreciate that the present disclosure can be implemented as a system, apparatus, method, or computer-readable medium (e.g., non-transitory storage medium) as a computer program product. Accordingly, the present disclosure may be embodied in various forms, such as an entirely hardware embodiment, an entirely software embodiment (including firmware, resident software, micro-program code, etc.) or an embodiment combining software and hardware aspects that may all be referred to hereinafter as a "circuit," module "or" system. Furthermore, the present disclosure may also be embodied in any tangible media as a computer program product having computer usable program code stored thereon.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of systems, apparatuses, methods and computer program products according to specific embodiments of the disclosure. It will be understood that each block of the flowchart illustrations and/or block diagrams, and any combination of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be executed by a processor of a general purpose computer, special purpose computer, 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, implement the functions or acts specified in the flowchart and/or block diagram block or blocks.
Flowcharts and block diagrams of the architecture, functionality, and operation in which systems, apparatuses, methods and computer program products according to various embodiments of the present disclosure may be implemented are shown in the accompanying drawings. Accordingly, each block in the flowchart or block diagrams may represent a module, segment, or portion of program code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in the drawings may be executed substantially concurrently, or in some cases, in the reverse order from the drawing depending on the functions involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or technical improvements to the market technology, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (13)
1. A network slice PDU session number quota management method includes:
a session number quota allocation step, wherein a high-layer NF unit stores the maximum PDU session number quota supported by a network slice, and allocates the PDU session number quota of the network slice to each low-layer NF unit of a plurality of low-layer NF units;
a session number quota acquiring step, in which a lower layer NF unit acquires a PDU session number quota of an allocated network slice from a higher layer NF unit, stores a local quota which is the PDU session number of the network slice, and notifies each local PCF unit of a plurality of local PCF units of the local quota of the PDU session number; and
and session number management, namely when the UE requests to establish or release the PDU session in the network slice, the local PCF unit performs corresponding processing according to the local quota of the PDU session number notified by the lower NF unit.
2. The network slice PDU session number quota management method of claim 1, wherein,
in the session number quota allocating step, the higher layer NF unit reserves a part of the PDU session number quota in the maximum PDU session number quota of the network slice as a PDU session number quota for dynamic allocation.
3. The network slice PDU session number quota management method of claim 1 or 2, wherein,
in the session number management step, when the UE requests to establish a new PDU session in the network slice, the local PCF unit performs corresponding processing according to whether the number of established PDU sessions of the network slice reaches the local quota of the number of PDU sessions.
4. The network slice PDU session number quota management method of claim 3, wherein,
in the session number management step, when the local PCF unit determines that the number of established PDU sessions has not reached the local quota of the number of PDU sessions, the UE is allowed to establish a new PDU session in the network slice, and the number of existing PDU sessions in the network slice is updated.
5. The network slice PDU session number quota management method of claim 3, wherein,
in the session number management step, when the local PCF unit judges that the established PDU session number reaches the local quota of the PDU session number, the local PCF unit reports and inquires whether a reserved PDU session number quota exists or not to the high-level NF unit through the low-level NF unit so as to request for newly adding the local quota of the PDU session number.
6. The network slice PDU session number quota management method of claim 5, wherein,
in the session number management step, when the higher layer NF unit has no reserved PDU session number quota, the local PCF unit rejects the user equipment UE to establish a new PDU session in the network slice.
7. The network slice PDU session number quota management method of claim 5, wherein,
in the session number management step, when the upper layer NF unit has a reserved PDU session number quota, the upper layer NF unit dynamically allocates a part of the reserved PDU session number quota to the network slice of the requesting lower layer NF unit, notifies the newly added PDU session number quota to the local PCF unit via the lower layer NF unit, and the local PCF unit updates the local quota of the PDU session number of the network slice, allows the user equipment UE to establish a new PDU session in the network slice, and updates the existing PDU session number of the network slice.
8. The network slice PDU session number quota management method of claim 1, wherein,
in the session number management step, when the user equipment UE requests to release the existing PDU session in the network slice, the local PCF unit updates the existing PDU session number of the network slice.
9. The network slice PDU session number quota management method of claim 1, wherein,
the high-layer NF unit is a backbone NRF unit under a 5G communication architecture, and the low-layer NF unit is a provincial NRF unit under the 5G communication architecture.
10. A network slice PDU session number quota management system, comprising:
the high-layer NF unit stores the maximum PDU session number quota supported by the network slice and distributes the PDU session number quota of the network slice to each low-layer NF unit of the plurality of low-layer NF units;
the lower-layer NF unit acquires the PDU session number quota of the distributed network slice from the higher-layer NF unit, stores the local quota which is used as the PDU session number of the network slice, and informs each local PCF unit of the plurality of local PCF units of the local quota of the PDU session number; and
and the local PCF unit carries out corresponding processing according to the local quota of the PDU session number notified by the lower NF unit when the UE requests to establish or release the PDU session in the network slice.
11. The network slice PDU session number quota management system of claim 10, wherein,
the high-layer NF unit is a backbone NRF unit under a 5G communication architecture, and the low-layer NF unit is a provincial NRF unit under the 5G communication architecture.
12. A computer-readable storage medium storing executable instructions that, when executed by an information processing apparatus, cause the information processing apparatus to perform the network slice PDU session number quota management method according to any one of claims 1 to 9.
13. An electronic device, comprising:
a memory, and
processing circuitry configured to perform the network slice PDU session number quota management method of any of claims 1-9.
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