idms, son, nfv - etsi
TRANSCRIPT
3GPP SA5 Policy Management Cases
IDMS, SON, NFV
ENI Technology Workshop on Policy Management
2020-09
Lingli Deng, Jiachen Zhang, Chen Wang (China Mobile)Haocheng Wang (BUPT)
Content
➢ IDMS: Intent Driven Management Service
➢ SON Policy and Coordination
➢NFV Policy Management
➢ Summary
IDMS:Intent Driven Management Service
IDM Service
Consumer
IDM Service
Producer
Network Infrastructure
(Physical and Virtual)
Intent from the consumer
Translate intent to
network deployment
information
Deploy the network
Continue network state
monitoring to meet the
intent
Communication
Service Customer
Communication
Service Provider
Network Operator
Virtual Infrastructure
Service Provider
Data Center Service
Provider
Network Equipment Provider
(incl. VNF Supplier)
NFVI Supplier
Hardware Supplier
End user,Small&Medium
Entreprise,Large Entreprise,
Vertical, other CSC etc.
Intent-NOP
Intent-CSC
Intent-CSP
Client
Client
Client
Client
Client
Client
Client
Provider
Provider
Provider
Provider
Provider
Provider
Provider
Intent Driven Management Service The scenarios for utilization of intent
Intent Expression
Description:
<IntentDrivenAction>,<IntentDrivenObject>
IntentDrivenObject(IDO):
<IntentDrivenObjectName>{<IntentDrivenObjectProperities>}
IntentDrivenAction(IDA):
<IntentDrivenActionName>{<IntentDrivenActionProperities>}
Relation between intent driven MnS and SON:
MnS Producer can translate the intent into SON target information or use the information in intent for
SON target directly.
IDMS for SON--Intent Driven Area Load Balance
Scenario description: Operator wants the selected
area to be balanced to ensure sufficient traffic capacity
for new UE(s) to access.
Intent expression:
Intent:AreaLoad balance
IntentDrivenAction:LoadBalance
IntentDrivenObject:AreaInfo
Execution steps:
• Identity the cell type;
• configures all corresponding SON Control Function
IOC instance;
• Decide corresponding SON target IOC;
• Analyze and configure the SON coordination
policies IOC;
• Do other analysis and management tasks;
• Evaluate the effect and repeat to ensure fulfilment.
IDMS for NFV---Intent driven NF capacity changing
Intent Expression:
Intent:NF capacity changing
IntentDrivenAction:CapacityChange
IntentDrivenObject:NFInfo
Execution step:
• Translate the received intent to the detailed
modification requirements;
• Configurate parameters for corresponding MOI(s);
• Allocate virtualized infrastructure resource(s) for
VNFs if any;
• Adjust physical infrastructure resource(s);
• Modify corresponding NF instance.
Scenario description: The operator wants to
change the capacity of an existing NF instance,for
example, expand capacity of an existing NF instance to
support additional certain number of UE(s).
Content
➢ IDMS: Intent Driven Management Service
➢ SON Policy and Coordination
➢NFV Policy Management
➢ Summary
SON Optimization Policy
1. The SON functionality keeps monitoring input dataaccording to the operator’s objectives and targets.
2. Whenever the objectives and targets are not met,optimization algorithms will be triggered.
3. Corrective actions are provided and executed.
4. Evaluating the result of the executed correctiveactions.
a. If the system status is not satisfactory, fallbackmay be needed to recover the systemconfiguration as the original state.
b. If the system status is satisfactory, the onetime optimization ends.
c. Return the input data to monitoring.
[1] TS 28.627
Fig 1. SON policy procedure[1]
Why SON Coordination?
Some SON functions will affect the common network parameters / States directly or indirectly,therefore, there may be conflicts or dependencies between the son functions.
The SCF (son coordination function) is introduced to do SON coordination.
Fig 2. Mesh relationship between SON functions and network parameters[2]
[2] TS 32.522
CCO: Capacity and Coverage Optimization
COC: Cell Outage Compensation
ES: Energy Saving
HOO: HandOver parameter Optimization
LBO: Load Balancing Optimization
RF: Radio Frequency
RRM: Radio Resource Management
SON Coordination Methods
A. Based on priority of SON functions
1. The impact area information should be known by the SCF.
2. By comparing the priorities of SON functions, SCF will decide to do the highest-priority action and
suspend the low-priority actions.
3. After the highest-priority SON function executed, the SCF is informed about the result
(successful/unsuccessful, parameters changes) of the action.
4. SCF will analyze the latest network situation to decide how to deal with the suspended low-priority
SON, for example, resuming or rejecting.
B. Based on the cell state
According to different type of conflicts, the SCF should check the state of involved cells and operate
on the conflicting SON functions based on the different cell states (allow/disallow).
C. Coordinating based on cell state and the priority of SON functions jointly
Cell State Based SON Coordination Example
[3] TS 28.628
Aoutage
B
Cenergy saving
ESM
compensateCOC
compensate
Fig 3. the conflict of COC and ESM
SON coordination procedure[3]
1. COC requests cell B to compensate the coverage of
cell A.
2. COC requests SCF check the state of cell B.
3. SCF should check whether cell B is compensating an
energy saving cell
a. If so, SCF should check whether cell B can
compensate both cell A and cell C concurrently.
b. If not, the SCF may disallow cell B to compensate
an energy saving cell.
Content
➢ IDMS: Intent Driven Management Service
➢ SON Policy and Coordination
➢NFV Policy Management
➢ Summary
3GPP Policy Management introduction
✓ TS28.331 (published):
⚫ focuses on 4G scenarios;
⚫ offers one high-level use case: deploying the SBC from IMS and
P-GW from EPC in the same Data Centre
⚫ defines PAF(same to PAP in NFV) and PF(same to PF in NFV);
IRP manager is PAF, IRP agent is PF
⚫ focuses on NM acting as PAF, EM acting as PF, interfaces and
policy related operations
✓ TS28.555/556 (new):
⚫ focuses on 5G scenarios;
⚫ offers 3 high-lever but similar use cases: deploying IMS network
functions in centralized or edge DCs; different DC; a same DC
⚫ uses PAF and PF; MnS provider is PAP, MnS consumer is PF
⚫ Just started, more details to be filled
NFV Orchestrator
(NFVO)
VNF Manager(VNFM)
Virtualised Infrastructure
Manager(VIM)
VNF
NFV-MANO
VNF
NFVI
Os-Ma-nfvo
Ve-Vnfm-em
Ve-Vnfm-vnf
Nf-Vi
EM
EM (PF)
NM (PAF)
Itf-N(add new policy interface)
3GPP management system
Itf-N(add new policy interface)
➢ As shown in right figure, 3GPP also focus on policy management. There are three main TSs focusing
on policy management, driven by policy conflict detection and resolution.
3GPP Policy Management introduction
➢ Right figure is the 4G version class diagram
➢ Similarities and differences:
✓ Specification level requirements are similar, 5G
version creates two requirements on policy execution
✓ Both have requirements on conflict detection and
resolution
✓ Both use PAF and PF roles
⚫ TS28.555/556 plans to define policy information
model and solutions which are not defined in
TS28.331.
⚫ In 4G version, IRP manager acts as PAF, IRP agent
acts as PF; while in 5G version, MnS consumer acts
as PAF, MnS provider acts as PF
More details will be confirmed with the progress of
TS28.555/556 which will be published in March and
June respectively
PolicyListpolicyId
policyPrioritypolicyStatuspolicyType
policyContent
PolicypolicyListIdpolicyIdList
PolicyManagementIRPpolicyConflictNotification
ManagedGenericIRPpolicyConflictNotification
PolicyManagementIRPoperationsCreatePolicy()DeletePolicy()UpdatePolicy()QueryPolicy()
ActivatePolicy()DeactiviatePolicy()
listPolicys()
PolicyManagementIRPNotificaitonspolicyConflictNotification()
Content
➢ IDMS: Intent Driven Management Service
➢ SON Policy and Coordination
➢NFV Policy Management
➢ Summary
Summary of ENI Mapping
➢ IDMS: intent policy & policy continuum
➢ SON Policy Coordination: intent policy & conflict avoidance
➢NFV Policy Management: intent/imperative policy & conflict resolution
➢ Future Work Proposals
Add contribution to ENI Mapping WID
Consider support intent/imperative policy models for various cases in stage 2
Identify ENI Assistance mode and align in interworking interfaces in stage3