Use Case Overview & Description
This use case intends to demonstrate the modeling, orchestration, assurance and optimization of end-to-end network slices, including RAN, Transport and Core slice sub-nets. This use case shall support different deployment scenarios of the Slice Management & Orchestration functions through a modular architecture and standards-based interfaces.
Use Case Key Information
|Requirements Proposal||This is a link to the requirements proposal made on the Requirements Sub-committee||E2E_Network_Slicing_vF2F_rqmts_v_1.0.pptx|
|Architecture S/C info||Information on the Architecture sub-committee presentation|
- ONAPARC-665Getting issue details... STATUS
Wiki page: E2E Network Slicing use case: Honolulu Architecture Review
|Prior Project "Base" Wiki||Link to the Guilin release page for this use case|
|Requirements Jira (REQ-###) Ticket||Link to the REQ Jira ticket for this use case|
|Key Use Case Leads & Contacts|
USE CASE LEADS: LIN MENG , Swaminathan Seetharaman
USE CASE KEY CONTACTS: LIN MENG , Swaminathan Seetharaman, Henry Yu, Milind Jalwadi Borislav Glozman
|Meetings Register & Recordings||Link to Use Case Team meetings|
Executive Summary: 5G Network Slicing is one of the key features of 5G. The essence of Network Slicing is in sharing network resources (PNFs, VNFs, CNFs) while satisfying widely varying and sometimes seemingly contradictory requirements to different customers in an optimal manner. Same network is expected to provide different Quality of Experience to different consumers, use case categories and industry verticals including factory automation, connected home, autonomous vehicles, smart cities, remote healthcare, in-stadium experience and rural broadband. An End-to-End Network Slice consists of RAN, Transport and Core network slice sub-nets. This Use Case intends to demonstrate the modeling, orchestration and assurance of a simple network slice (e.g. eMBB). While 3GPP standards are evolving and 5G RAN and core are being realized, this Use Case will start with realizing an E2E Network Slice with a simple example of a 5G RAN, Core and Transport Network Slice sub-nets. It will also align with relevant standard bodies (e.g., 3GPP, ETSI, TM Forum) as well as other open initiatives such as O-RAN where relevant, w.r.to both interfaces as well as the functional aspects.
Business Impact: Network Slicing is a feature that almost every service provider will leverage. It allows a service provider to improve their network efficiency by maximizing the network throughput more tailored to each user's use of the network. It is seen as an imperative for efficient and optimal use of their network. This will be particularly relevant as 5G is expected to have upwards of 10,000x the traffic load over 4G and 20GB peak data rates.
Business Markets: Network Slicing, for this use case, is specifically aimed at a 5G access, core and transport. In the future, this might be extended to other domains or applications such as fixed-wireless convergence, Wi-Fi access, all aspects of transport including fronthaul, or unified network management orchestration. Network Slicing functionality is what almost every wireless service provider will inevitably find valuable. The concepts and modeling work being done for Network Slicing will find applications in other areas as well. (Industries) Some applications and industries such as smart cities, remote maintenance, video streaming vs life-saving first-responder type applications will demand different requirements from Network slicing. (Markets/Regions) There are no regional specific aspects to Network Slicing.
Funding/Financial Impacts: Network slicing engenders the optimal use of resources for a Network. Thus, this represents OPEX savings for a service provider.
Organization Mgmt, Sales Strategies: There is no additional organizational management or sales strategies for this use case outside of a service providers "normal" ONAP deployment and its attendant organizational resources from a service provider.
|PROJECT||PTL||User Story / Epic||Requirement|
Minor impacts related to NSSTs, Slice Profile attributes, etc.
|AAF||No impact foreseen|
No impact foreseen
|CLAMP||No impact foreseen|
|CC-SDK||CDS impacts related to initial configuration of Core NSSI NFs, reconfiguration during Core NSSI reuse as well as due to Closed Loop actions. Potential impacts for RAN Slicing.|
|DMaaP||No impact foreseen|
|External API||Modernized TMF 628 API support for KPI Monitoring (Stretch goal)|
|HOLMES||No impact foreseen|
|MODELING||Enhancements related to endpoints, Slice Profile ↔ Service Profile mapping, etc.|
|No impact foreseen|
|OOF||Impacts related to NST selection, endpoints, slice profile decomposition, etc.|
|OOM||No impact foreseen|
|POLICY||No impact foreseen|
|PORTAL||No impact foreseen|
|SDN-C||Initial configuration of RAN NSSI, reconfiguration during NSSI reuse, RAN NSSI termination, Closed Loop actions. In addition determination of RAN resources, A1 interface support for Network Slicing|
|SDC||No impact foreseen|
|SO||Enhancements in NSMF, RAN/Core/TN NSSMF functionality in SO|
|VID||No impact foreseen|
|VF-C||No impact foreseen|
|VNFRQTS||No impact foreseen|
|VNF-SDK||No impact foreseen|
|CDS||See CCSDK||See CCSDK impacts|
|U-UI||Tao Shen||Endpoint related enhancements|
List of PTLs:Approved Projects
*Each Requirement should be tracked by its own User Story in JIRA
USE CASE DIAGRAM
Use cases define how different users interact with a system under design. Each use case represents an action that may be performed by a user (defined in UML as an Actor with a user persona).
Use Case Functional Definitions
Use Case Title
Title of the Use Case
Actors (and System Components)
The list of Actors and System Components that participate in the Use Case
Short overview of the Use Case
Points of Contact
Authors and maintainers of the Use Case.
Use Case Lead, Key Use Case members and code contributors.
A list of conditions that are assumed to be true before the Use Case is invoked
Includes description of Information Consumed
Triggers / Begins when
Describes the trigger for beginning the Use Case
Steps / Flows (success)
Describes the sequence of steps and interactions that occur during the Use Case (may include: description, data exchanges, functionality, state changes)
Interaction diagrams may be included or referenced
The expected results of the execution of the Use Case
Includes description of Information Produced
Alternate / Exception Paths
Description of any exceptions or special process that could occur during Use Case
Related Use Cases
List of the Use Cases referenced by this Use Case
Describes any assumptions that are made for this use case
Tools / References / Artifacts
List of any tools or reference material associated with this Use Case as well as any JIRA trace-ability.
List of any associated diagrams or modelling artifacts associated with the Use Case
- High visibility bugs
- Other issues for testing that should be seen at a summary level
- Where possible, always include JIRA links
End to End flow to be Tested
**This should be a summary level Sequence diagram done in Gliffy**
Test Cases and Status
|1||There should be a test case for each item in the sequence diagram|
NOT YET TESTED
|2||create additional requirements as needed for each discreet step|
|3||Test cases should cover entire Use Case|
|Feb 02, 2021|
Presentation given at LFN DDF
Recording (including Guilin demo for Option 2)
|Dec 08, 2020||Presentation given to ArchCom|
|Dec 08, 2020||Presentation given to ETSI ZSM|
|Nov 12, 2020||Presentation given at Use case realization call|
|Oct 14, 2020||Presentation given to Requirements Sub-Committee during the LFN vF2F for Honolulu requirements|
|Oct 13, 2020|
Presentation given at LFN vF2F on Honolulu requirements & Roadmap (in detail).
Recording: See here.
|May 11, 2021||Presentation given at LFN Honolulu Webinar|