Patent Application
20230403173
The present disclosure generally relates to the technical field of communication technologies, and particularly to methods, entities, and computer readable media for error handling.
This section is intended to provide a background to the various embodiments of the technology described in this disclosure. The description in this section may include concepts that could be pursued, but are not necessarily ones that have been previously conceived or pursued. Therefore, unless otherwise indicated herein, what is described in this section is not prior art to the description and/or claims of this disclosure and is not admitted to be prior art by the mere inclusion in this section.
3GPP TS 29.512 v17.0.0 (which is incorporated herein as a whole by reference) has several chapters for an error report to Policy Control Function (PCF), in which
Chapter 4.2.3.16 describes a Policy and Charging Control (PCC) rule error report for Npcf_SMPolicyControl_UpdateNotify Service Operation;
Chapter 4.2.3.20 describes a Session Rule Error Report for Npcf_SMPolicyControl_UpdateNotify Service Operation;
Chapter 4.2.3.26 describes Policy decision and condition data error handling for Npcf_SMPolicyControl_UpdateNotify Service Operation;
Chapter 4.2.4.15 describes PCC rule error report for Npcf_SMPolicyControl_Update and Npcf_SMPolicyControl_Create Service Operation;
Chapter 4.2.4.21 describes a Session Rule Error Report for Npcf_SMPolicyControl_Update and Npcf_SMPolicyControl_Create Service Operation.
Chapter 4.2.4.26 describes Policy decision and condition data error handling for Npcf_SMPolicyControl_Update and Npcf_SMPolicyControl_Create Service Operation.
These chapters describes the error happens in rule or policy decision. However, since the policy decision and condition data are referred by rule, the reference may be wrongly provisioned or updated by the PCF. Or, the error may happen in attributes in SmPolicyDecision other than sessRules, pccRules, gosDecs, chgDecs, traffContDecs, umDecs, gosMonDecs and conds, such as the attributes reflectiveQoSTimer, policyCtrlReqTriggers, lastReqUsageData, praInfos etc.
The current 3GPP specifications don't have the option for the Session Management Function (SMF) to report the policy decision and condition data with session rule/PCC rule reference error and error in attributes in SmPolicyDecision other than sessRules, pccRules, gosDecs, chgDecs, traffContDecs, umDecs, gosMonDecs and conds.
There are generally three types of error cases:
When such an error happens, there is no description about how to handle it.
For case 1 and case 2, currently, if the error information is provisioned from a UpdateNotify message (e.g., the Npcf_SMPolicyControl_UpdateNotify Request message), the SMF may reject the message with error status code. If the error applies to one or more PCC/session rule, it may also be with a rule error report. However, there is no appropriate FailureCode/SessionRuleFailureCode with current specification. Using incorrect failure code may lead to wrong decision on the PCF for the existing session; and
For case 1 and case 2, if the error information is provisioned from a Create/Update Response message (e.g., the Npcf_SMPolicyControl_Create/UpdateResponse message), there is no mechanism to report the error back to the PCF. The SMF may ignore the error which leads to unspecified behaviors and inconsistent interactions between the SMF and the PCF. The SMF may terminate user session, which leads bad end user experience;
For case 3, if the error happens in attributes in SmPolicyDecision other than sessRules, pccRules, gosDecs, chgDecs, traffContDecs, umDecs, gosMonDecs and conds, e.g., praInfos validation/enforcement error, or the PCF removing the “US_RE” policy control request trigger while usage monitoring is still active in the SMF, the current 3GPP specifications don't have the option for the SMF to report such errors.
In view of the foregoing, in the current 3GPP specifications, if the error information is provisioned from the UpdateNotify message (e.g., the Npcf_SMPolicyControl_UpdateNotify Request message), the SMF may reject the message with error status code; and if the error information is provisioned from the Create/Update Response message (e.g., the Npcf_SMPolicyControl_Create/UpdateResponse message), there is no mechanism for the SMF to report the error to the PCF. In addition, if the error happens in attributes in SmPolicyDecision other than sessRules, pccRules, gosDecs, chgDecs, traffContDecs, umDecs, gosMonDecs and conds, e.g., praInfos validation/enforcement error, policyCtrlReqTriggers, there is also no mechanism for the SMF to report the error.
Therefore, an effective error handling mechanism is thus desired.
In order to achieve at least the above purpose, the present disclosure introduces an option for the SMF to notify the PCF about:
According to a first aspect of the present disclosure, a method at a first entity is provided. The method includes: determining, based on a policy decision provisioned by a second entity, that an error in at least one of: reference of a session rule and/or a Policy and Charging Control, PCC, rule to the policy decision, or an attribute in the policy decision; and transmitting, to the second entity, a notification of the error.
In an exemplary embodiment, the method further includes: receiving, from the second entity, an updated policy decision.
In an exemplary embodiment, the error in reference of the session rule and/or the PCC rule to the policy decision further includes at least one of: the session rule and/or the PCC rule referring to an empty policy decision, or inconsistency of the policy decision with the session rule and/or the PCC rule.
In an exemplary embodiment, the inconsistency of the policy decision with the session rule and the PCC rule further includes at least one of: inconsistency of the policy decision that is provisioned by the second entity with both the session rule and the PCC rule in the same policy decision, or inconsistency of the policy decision that is provisioned by the second entity with both a session rule and a PCC rule in an updated policy decision.
In an exemplary embodiment, the notification of the error is carried in a first request message for policy control update.
In an exemplary embodiment, the updated policy decision is carried in a first response message corresponding to the first request message for policy control update.
In an exemplary embodiment, the method further includes: transmitting, to the second entity, a second request message for policy control create/update; and receiving, from the second entity, a second response message corresponding to the second request message for policy control create/update, which includes the policy decision provisioned by the second entity.
In an exemplary embodiment, the notification of the error is carried in a first response message for policy control update notification.
In an exemplary embodiment, the method further includes: receiving, from the second entity, a first request message corresponding to the first response message for policy control update notification, which includes the policy decision provisioned by the second entity.
In an exemplary embodiment, the updated policy decision is carried in a second request message for policy control update notification.
In an exemplary embodiment, the first entity is an SMF, entity, and the second entity is a PCF entity.
In an exemplary embodiment, the policy decision includes a Session Management (SM) policy decision represented by SmPolicyDecision.
In an exemplary embodiment, the error in the attribute in the policy decision includes an error in at least one attribute in SmPolicyDecision other than sessRules, pccRules, gosDecs, chgDecs, traffContDecs, umDecs, gosMonDecs and conds.
According to a second aspect of the present disclosure, a method at a second entity is provided. The method includes: receiving, from a first entity, a notification of an error in at least one of: reference of a session rule and/or a PCC rule to a policy decision, or an attribute in a policy decision; and updating the policy decision.
In an exemplary embodiment, the method further includes: transmitting, to the first entity, the updated policy decision.
In an exemplary embodiment, the error in reference of the session rule and/or the PCC rule to the policy decision further includes at least one of: the session rule and/or the PCC rule referring to an empty policy decision, or inconsistency of the policy decision with the session rule and/or the PCC rule.
In an exemplary embodiment, the inconsistency of the policy decision with the session rule and the PCC rule further includes at least one of: inconsistency of the policy decision that is provisioned by the second entity with both the session rule and the PCC rule in the same policy decision, or inconsistency of the policy decision that is provisioned by the second entity with both a session rule and a PCC rule in an updated policy decision.
In an exemplary embodiment, the notification of the error is carried in a first request message for policy control update.
In an exemplary embodiment, the updated policy decision is carried in a first response message corresponding to the first request message for policy control update.
In an exemplary embodiment, the method further includes: receiving, from the first entity, a second request message for policy control create/update; and transmitting, to the first entity, a second response message corresponding to the second request message for policy control create/update, which includes the Policy decision provisioned by the second entity.
In an exemplary embodiment, the notification of the error is carried in a first response message for policy control update notification.
In an exemplary embodiment, the method further includes: transmitting, to the first entity, a first request message corresponding to the first response message for policy control update notification, which includes the policy decision provisioned by the second entity.
In an exemplary embodiment, the updated policy decision is carried in a second request message for policy control update notification.
In an exemplary embodiment, the first entity is an SMF entity, and the second entity is a PCF entity.
In an exemplary embodiment, the policy decision includes an SM policy decision represented by SmPolicyDecision.
In an exemplary embodiment, the error in the attribute in the policy decision includes an error in at least one attribute in SmPolicyDecision other than sessRules, pccRules, gosDecs, chgDecs, traffContDecs, umDecs, gosMonDecs and conds.
According to a third aspect of the present disclosure, a first entity is provided. The first entity includes: at least one processor, and at least one memory, storing instructions which, when executed on the at least one processor, cause the first entity to perform any of the methods according to the first aspect of the present disclosure.
According to a fourth aspect of the present disclosure, a second entity is provided. The second entity includes: at least one processor, and at least one memory, storing instructions which, when executed on the at least one processor, cause the second entity to perform any of the methods according to the second aspect of the present disclosure.
According to a fifth aspect of the present disclosure, a computer readable storage medium is provided. The computer readable storage medium has computer program instructions stored thereon, the computer program instructions, when executed by at least one processor, causing the at least one processor to perform the method according to any of the first and second aspects of the present disclosure.
According to the above technical solutions of the present disclosure, for the scenarios when the policy decision with session rule/PCC rule reference error happens; or the error in at least one attribute in SmPolicyDecision other than sessRules, pccRules, qosDecs, chgDecs, traffContDecs, umDecs, qosMonDecs and conds happens, e.g., the Presence Reporting Area (PRA) information validation/enforcement error happens, the SMF may notify the PCF about the error for the PCF decision of updating the provision according to valid information. Otherwise, the SMF may ignore the error which may cause the information inconsistency between the SMF and the PCF, or the SMF may terminate the PDU session which may lower the user experience.
The objects, advantages and characteristics of the present disclosure will be more apparent, according to descriptions of preferred embodiments in connection with the drawings, in which:
It should be noted that throughout the drawings, same or similar reference numbers are used for indicating same or similar elements; various parts in the drawings are not drawn to scale, but only for an illustrative purpose, and thus should not be understood as any limitations and constraints on the scope of the present disclosure.
Hereinafter, the principle and spirit of the present disclosure will be described with reference to illustrative embodiments. Some of the embodiments contemplated herein will now be described more fully with reference to the accompanying drawings. Other embodiments, however, are contained within the scope of the subject matter disclosed herein, the disclosed subject matter should not be construed as limited to only the embodiments set forth herein; rather, these embodiments are provided by way of example to convey the scope of the subject matter to those skilled in the art.
Those skilled in the art will appreciate that the term “exemplary” is used herein to mean “illustrative,” or “serving as an example,” and is not intended to imply that a particular embodiment is preferred over another or that a particular feature is essential. Likewise, the terms “first”, “second”, “third”, and similar terms, are used simply to distinguish one particular instance of an item or feature from another, and do not indicate a particular order or arrangement, unless the context clearly indicates otherwise. Further, the term “step,” as used herein, is meant to be synonymous with “operation” or “action.” Any description herein of a sequence of steps does not imply that these operations must be carried out in a particular order, or even that these operations are carried out in any order at all, unless the context or the details of the described operation clearly indicates otherwise.
References in the specification to “one embodiment,” “an embodiment,” “an example embodiment,” etc. indicate that the embodiment described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be liming of exemplary embodiments. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises”, “comprising”, “has”, “having”, “includes” and/or “including”, when used herein, specify the presence of stated features, elements, and/or components etc., but do not preclude the presence or addition of one or more other features, elements, components and/or combinations thereof.
As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed terms.
In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skills in the art to which this disclosure belongs.
As used herein, the term “network” refers to a network following any suitable (wireless or wired) communication standards. For example, the wireless communication standards may comprise new radio (NR), long term evolution (LTE), LTE-Advanced, wideband code division multiple access (WCDMA), high-speed packet access (HSPA), Code Division Multiple Access (CDMA), Time Division Multiple Address (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency-Division Multiple Access (OFDMA), Single carrier frequency division multiple access (SC-FDMA) and other wireless networks. A CDMA network may implement a radio technology such as Universal Terrestrial Radio Access (UTRA), etc. UTRA includes WCDMA and other variants of CDMA. A TDMA network may implement a radio technology such as Global System for Mobile Communications (GSM). An OFDMA network may implement a radio technology such as Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDMA, Ad-hoc network, wireless sensor network, etc. In the following description, the terms “network” and “system” can be used interchangeably.
Furthermore, the communications between two devices in the network may be performed according to any suitable communication protocols, including, but not limited to, the wireless communication protocols as defined by a standard organization such as 3GPP or the wired communication protocols. For example, the wireless communication protocols may comprise the first generation (1G), 2G, 3G, 4G, 4.5G, 5G communication protocols, and/or any other protocols either currently known or to be developed in the future.
The term “entity” or “network entity” used herein refers to a network device or network node or network function in a communication network, and may also refer to a virtualized entity that may be implemented on cloud. For example, in a wireless communication network such as a 3GPP-type cellular network, a core network device may offer numerous services to customers who are interconnected by an access network device. Each access network device is connectable to the core network device over a wired or wireless connection.
The basic ideas of the present disclosure mainly consist in that an NRF may obtain aggregated routing related information according to registration of domain information and/or update of the registration from SCPs to the NRF and possibly, other NRF(s); and an SCP requesting routing path discovery may retrieve the aggregated routing related information from the NRF, and subscribe to the NRF for change of the aggregated routing related information. Therefore, a routing path may be found by the SCP based on the retrieved aggregated routing related information without the need of finding the interconnected SCP domain(s) and the intermediate SCP(s) from the NRF hop by hop.
Hereinafter, a method 100 at a first entity for error handling according to an exemplary embodiment of the present disclosure will be described with reference to
In an exemplary embodiment, the first entity may be an SMF entity, also called SMF for simplicity, and the second entity may be a PCF entity also called PCF for simplicity. However, it should be understood that the first entity may be any node that can be configured to perform the method 100 as described below, including a virtualized entity that may be implemented on cloud. It should also be understood that the method 100 may be appropriately applied in 5GS, or other future developments.
In step S101, the first entity may determine, based on a policy decision provisioned by a second entity, that an error in at least one of: reference of a session rule and/or a PCC rule to the policy decision, or an attribute in the policy decision.
In an exemplary embodiment, the error in reference of the session rule and/or the PCC rule to the policy decision may include at least one of: the session rule and/or the PCC rule referring to an empty policy decision, or inconsistency of the policy decision with the session rule and/or the PCC rule.
In an exemplary embodiment, the inconsistency of the policy decision with the session rule and the PCC rule may include at least one of: inconsistency of the policy decision that is provisioned by the second entity with both the session rule and the PCC rule in the same policy decision, or inconsistency of the policy decision that is provisioned by the second entity with both a session rule and a PCC rule in an updated policy decision.
In an exemplary embodiment, the policy decision may include an SM policy decision represented by SmPolicyDecision.
Preferably, the error in the attribute in the policy decision may include an error in at least one attribute in SmPolicyDecision other than sessRules, pccRules, qosDecs, chgDecs, traffContDecs, umDecs, qosMonDecs and conds, such as the attribute reflectiveQoSTimer, policyCtrlReqTriggers, lastReqUsageData, praInfos etc. For example, an error in praInfos may be praInfos validation/enforcement error, an error in policyCtrlReqTriggers may be e.g., the PCF removing the “US_RE” policy control request trigger while usage monitoring is still active in the SMF.
In Step S103, the first entity may transmit, to the second entity, a notification of the error.
In an exemplary embodiment, the notification of the error may be carried in a first request message for policy control update, e.g., Npcf_SMPolicyControl_Update Request message including ruleReports/sessRuleReports/policyDecFailureReports.
In an exemplary embodiment, regarding the policy decision with session rule/PCC rule reference error, the FailureCode for PCC rule error report may be extended:
In Chapter 5.6.3.9 of 3GPP TS 29.512 v17.0.0, Data Types in Table 5.6.3.9-1 (shown as Table 2 below): Enumeration FailureCode may be added.
In an exemplary embodiment, regarding the policy decision with session rule reference error, the SessionRuleFailureCode for session rule error report may be extended:
In Chapter 5.6.3.17 of 3GPP TS 29.512 v17.0.0, data types in Table 5.6.3.17-1 (shown as Table 3 below): Enumeration SessionRuleFailureCode may be added.
In an exemplary embodiment, regarding e.g., the praInfos and policyCtrlReqTriggers error, the PolicyDecisionFailureCode for PolicyDecisionErrorHandling may be extended.
In Chapter Table 5.6.2.19-1, and Table 5.6.2.33-1 (shown as Table 4 below), the following may be added:
In Chapter 5.6.3.28 of 3GPP TS 29.512 v17.0.0, data types in Table 5.6.3.28-1 (shown as Table 5 below): PolicyDecisionFailureCode may be added.
After the second entity receives the notification of the error, the second entity updates the policy decision, and transmits the updated policy decision to the first entity.
Thus, the method 100 further includes: the first entity receiving, from the second entity, the updated policy decision.
In an exemplary embodiment, the updated policy decision is carried in a first response message corresponding to the first request message for policy control update, e.g., an Npcf_SMPolicyControl_Update Response message.
In an exemplary embodiment, the method may further include: the first entity transmitting, to the second entity, a second request message for policy control create/update, e.g., an Npcf_SMPolicyControl_Create/Update Request message; and receiving, from the second entity, a second response message corresponding to the second request message for policy control create/update, which comprises the policy decision provisioned by the second entity, e.g., an Npcf_SMPolicyControl_Create/Update Response message.
In another exemplary embodiment, the notification of the error may be carried in a first response message for policy control update notification, e.g., an Npcf_SMPolicyControl_UpdateNotify Response message including ruleReports/sessRuleReports/policyDecFailureReports.
In this exemplary embodiment, the method 100 may further include: receiving, from the second entity, a first request message corresponding to the first response message for policy control update notification, e.g., an Npcf_SMPolicyControl_UpdateNotify Request message which comprises the policy decision provisioned by the second entity.
In this exemplary embodiment, the updated policy decision is carried in a second request message for policy control update notification, e.g., an Npcf_SMPolicyControl_UpdateNotify Response message.
The first entity may be an SMF entity, and the second entity may be a PCF entity.
Hereinafter, a method 200 at a second entity for error handling according to an exemplary embodiment of the present disclosure will be described with reference to
In an exemplary embodiment, the first entity may be an SMF entity, also called SMF for simplicity, and the second entity may be a PCF entity also called PCF for simplicity. However, it should be understood that the second entity may be any node that can be configured to perform the method 200 as described below, including a virtualized entity that may be implemented on cloud. It should also be understood that the method 200 may be appropriately applied in 5GS, or other future developments.
In step S201, the second entity may receive, from the first entity, a notification of an error in at least one of: reference of a session rule and/or a PCC rule to the policy decision, or an attribute in the policy decision.
In an exemplary embodiment, the notification of the error may be carried in a first request message for policy control update, e.g., Npcf_SMPolicyControl_Update Request message including ruleReports/sessRuleReports/policyDecFailureReports.
In step S203, the second entity may update the policy decision based on the received notification of the error.
The method further include: the second entity transmitting, to the first entity, the updated policy decision.
In an exemplary embodiment, the updated policy decision is carried in a first response message corresponding to the first request message for policy control update, e.g., an Npcf_SMPolicyControl_Update Response message.
In an exemplary embodiment, the method 200 may further include: the second entity receiving, from the first entity, a second request message for policy control create/update, e.g., an Npcf_SMPolicyControl_Create/Update Request message; and transmitting, to the first entity, a second response message corresponding to the second request message for policy control create/update, which comprises the policy decision provisioned by the second entity, e.g., an Npcf_SMPolicyControl_Create/Update Response message.
In another exemplary embodiment, the notification of the error may be carried in a first response message for policy control update notification, e.g., an Npcf_SMPolicyControl_UpdateNotify Response message including ruleReports/sessRuleReports/policyDecFailureReports.
In this exemplary embodiment, the method 200 may further include: transmitting, to the first entity, a first request message corresponding to the first response message for policy control update notification, e.g., an Npcf_SMPolicyControl_UpdateNotify Request message which comprises the policy decision provisioned by the second entity.
In this exemplary embodiment, the updated policy decision is carried in a second request message for policy control update notification, e.g., an Npcf_SMPolicyControl_UpdateNotify Response message.
Hereinafter, an exemplary signaling sequence diagrams related to error handling according to an exemplary embodiment of the present disclosure will be described respectively with reference to
In the exemplary signaling sequence diagrams of
It should be noted that the description below mainly focuses on signaling related to the methods 100 and 200, and some other signaling is not described in detail to avoid obscuring the principle of the present disclosure.
In the scenario of
In S3A_1, the SMF sends e.g., SmPolicyControl_Create/Update Request to the PCF;
In S3A_2, the PCF provisions, to the SMF, new policy decision and/or condition data, as well as session rules and PCC rules with reference to policy decision and/or condition data if applicable via e.g., SmPolicyControl_Create/Update Response;
The SMF validates the PCF provisioned SM policy decisions/condition data as well as session and PCC rules, and finds errors as described previously. That is,
Then, in S3A_3, the SMF reports the error to the PCF using e.g., SmPolicyControl_Update Request including error reports to indicate the error;
In S3A_4, the PCF provisions updated new decision to the SMF via e.g., SmPolicyControl_Update Response based on the report error.
In the scenario of
In S3B_1: the PCF provisions policy decision and/or condition data, as well as session rules and PCC rules with reference to policy decision and/or condition data using e.g., SmPolicyControl_UpdateNotify Request;
The SMF validates the PCF provisioned SM policy decisions/condition data as well as session and PCC rules.
Then, in S3B_2, the SMF reports the error to PCF using e.g., SmPolicyControl_UpdateNotify Response including error reports to indicate the error;
In S3B_3, the PCF provisions updated new decision to the SMF via e.g., SmPolicyControl_UpdateNotify Request based on the report error.
In S3B_4, the SMF responds with e.g., SmPolicyControl_UpdateNotify Response.
Hereinafter, a structure of a first entity according to an exemplary embodiment of the present disclosure will be described with reference to
As shown in
The determination unit 401 may determine, based on a policy decision provisioned by a second entity, that an error in at least one of: reference of a session rule and/or a PCC rule to the policy decision, or an attribute in the policy decision.
The transmitting unit 403 may transmit, to the second entity, a notification of the error.
In an exemplary embodiment, the first entity 400 may also include a receiving unit (not shown), which may be configured to receive, from the second entity, an updated policy decision.
In an exemplary embodiment, the transmitting unit 403 may be further configured to transmit, to the second entity, a second request message for policy control create/update.
In an exemplary embodiment, the receiving unit may be further configured to receive, from the second entity, a second response message corresponding to the second request message for policy control create/update, which comprises the policy decision provisioned by the second entity.
In an exemplary embodiment, the receiving unit may be further configured to receive, from the second entity, a first request message corresponding to the first response message for policy control update notification, which comprises the policy decision provisioned by the second entity.
Hereinafter, a structure of a first entity according to another exemplary embodiment of the present disclosure will be described with reference to
As shown in
The at least one memory 503 stores instructions executable by the at least one processor 501. The instructions, when loaded from the at least one memory 503 and executed on the at least one processor 501, may cause the first entity 500 to perform the actions, e.g., of the procedures as described earlier respectively in conjunction with
Hereinafter, a structure of a second entity according to an exemplary embodiment of the present disclosure will be described with reference to
As shown in
The receiving unit 601 may receive, from a first entity, a notification of an error in at least one of: reference of a session rule and/or a Policy and Charging Control, PCC, rule to the policy decision, or an attribute in the policy decision.
The updating unit 603 may update the policy decision based on the received notification of the error.
In an exemplary embodiment, the second entity 600 may further include a transmitting unit, which may be configured to transmit, to the first entity, the updated policy decision.
In an exemplary embodiment, the receiving unit 601 may be further configured to receive, from the first entity, a second request message for policy control create/update, and the transmitting unit may be further configured to transmit, to the first entity, a second response message corresponding to the second request message for policy control create/update, which comprises the Policy decision provisioned by the second entity
In an exemplary embodiment, the transmitting unit may be further configured to transmit, to the first entity, a first request message corresponding to the first response message for policy control update notification, which comprises the policy decision provisioned by the second entity.
Hereinafter, a structure of a second entity according to another exemplary embodiment of the present disclosure will be described with reference to
As shown in
The at least one memory 703 stores instructions executable by the at least one processor 701. The instructions, when loaded from the at least one memory 703 and executed on the at least one processor 1101, may cause the executing entity 700 to perform the actions, e.g., of the procedures as described earlier respectively in conjunction with
The present disclosure also provides at least one computer program product in the form of a non-volatile or volatile memory, e.g., a non-transitory computer readable storage medium, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a flash memory and a hard drive. The computer program product includes a computer program.
The computer program includes: code/computer readable instructions, which when executed by the at least one processor 501 causes the first entity 500 to perform the actions, e.g., of the procedure described earlier in conjunction with
The computer program product may be configured as a computer program code structured in computer program modules. The computer program modules could essentially perform the actions of the flow illustrated in any of
The processor may be a single CPU (Central processing unit), but could also include two or more processing units. For example, the processor may include general purpose microprocessors; instruction set processors and/or related chips sets and/or special purpose microprocessors such as Application Specific Integrated Circuit (ASICs). The processor may also include board memory for caching purposes. The computer program may be carried by a computer program product connected to the processor. The computer program product may include a non-transitory computer readable storage medium on which the computer program is stored. For example, the computer program product may be a flash memory, a Random-access memory (RAM), a Read-Only Memory (ROM), or an EEPROM, and the computer program modules described above could in alternative embodiments be distributed on different computer program products in the form of memories.
The present disclosure has been described above with reference to embodiments thereof. It should be understood that various modifications, alternations and additions can be made by those skilled in the art without departing from the spirits and scope of the present disclosure. Therefore, the scope of the present disclosure is not limited to the above particular embodiments but only defined by the claims as attached.
The present disclosure further comprises the following embodiments based on the 3GPP TS 29.512 v17.0.0.
If the “PolicyDecisionErrorHandling” feature is supported and if the SMF receives one or more policy decision types (as defined in subclause 4.1.4.4) and/or condition data (as defined in subclause 4.1.8) which are not referred by any PCC rules or session rules as defined in subclause 4.2.3.1 but the storage of the policy decision types and/or condition data was unsuccessful (e.g. the policy decision could not be successfully stored due to a limitation of resources at the SMF), or because there are semantical inconsistencies in the provided data, the SMF shall behave as follows:
When the PCF receives the above reports, the PCF shall consider all the instances of the policy decisions and/or condition data which are provisioned in the request message and indicated by the PolicyDecisionFailureCode data type are removed from the SMF. When the PCF receives the response with HTTP “400 Bad Request” status code but the “policyDecFailureReports” attribute is not included, the PCF shall consider all the provisioned instances of the policy decisions and/or condition data in the request message are removed from the SMF.
The removal of a policy decision type and/or condition data shall not fail.
If the “ExtPolicyDecisionErrorHandling” feature is supported and if the SMF receives other SM policy decisions than PCC rules, session rules, policy decision types or condition data (e.g. the SMF receives policy control request triggers and applicable additional information), and the SMF detects the received policy decision cannot be enforced (e.g., because semantical inconsistencies in the provided data):
When the PCF receives the above reports, the PCF shall consider:
4.2.4.26 Policy decision error handling
4.2.4.26.x1 Policy decision types and condition data error handling
If the “PolicyDecisionErrorHandling” feature is supported and one or more policy decision types (as defined in subclause 4.1.4.4) and/or condition data (as defined in subclause 4.1.8) which are not referred by any PCC rules or session rules is provisioned using the procedure as defined in subclauses 4.2.2.1, 4.2.3.1 or 4.2.4.1 but the storage was unsuccessful (e.g. the policy decision could not be successfully stored due to a limitation of resources at the SMF), or because there are semantic al inconsistencies in the provided data, the SMF shall include the “policyDecFailureReports” attribute to indicate the type(s) of the failed policy decisions and/or condition data within the SmPolicyUpdateContextData data structure. When the PCF receives the above reports, the PCF shall consider all the instances of the policy decisions and/or condition data which are not referred by any PCC rule and/or session stored at the SMF and indicated by the PolicyDecisionFailureCode data type are removed from the SMF. If the “ExtPolicyDecisionErrorHandling” feature is supported, the SMF may also encode within the “invalidPolicyDecs” attribute the failed policy decisions.
If the “ExtPolicyDecisionErrorHandling” feature is supported and one or more SM Policy decisions other than PCC rules, session rules policy decision types or condition data are provisioned using the procedure as defined in subclauses 4.2.2.1, 4.2.3.1 or 4.2.4.1 but the SMF detects the received policy decision cannot be enforced (e.g. because semantical inconsistencies in the provided data), and the SMF determines that the PDU session can be kept, the SMF shall include the “policyDecFailureReports” attribute within the SmPolicyUpdateContextData data structure to indicate a failure in the provided policy decision parameters. The SMF may also encode within the “invalidPolicyDecs” attribute the failed policy decisions.
When the PCF receives the above report, the PCF shall consider:
This subclause specifies the application data model supported by the API.
The Npcf_SMPolicyControl API allows the SMF to retrieve the session management related policy from the PCF as defined in 3GPP TS 23.503 [6].
Table 5.6.1-1 specifies the data types defined for the Npcf_SMPolicyControl service based interface protocol.
Table 5.6.1-2 specifies data types re-used by the Npcf_SMPolicyControl service based interface protocol from other specifications, including a reference to their respective specifications and when needed, a short description of their use within the Npcf_SMPolicyControl service based interface.
The optional features in table 5.8-1 are defined for the Npcf_SMPolicyControl API. They shall be negotiated using the extensibility mechanism defined in subclause 6.6 of 3GPP TS 29.500 [4].
| Number | Date | Country | Kind |
|---|---|---|---|
| PCT/CN2020/124565 | Oct 2020 | WO | international |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2021/072998 | 8/19/2021 | WO |
