July 7 th , 2017 version Part II: - What are my main use cases? Security Level: - What IETF work is in progress? Main Use Cases and Gap Analysis for Network Slicing draft-netslices-usecases-01 draft-qiang-netslices-gap-analysis-01 www.huawei.com HUAWEI TECHNOLOGIES CO., LTD. Cristina QIANG
Identified Network Slice Use Cases Network Slice as a Service (NSaaS) 3GPP as a use case Network Customization Resource Assurance New Technologies Virtual Customer Massive Ultra-Reliable and Low- Information Enhanced Mobile Mission Critical Premise Machine Type Latency Communication Centric Network Broadband (eMBB) Service ( MCS) Equipment (vCPE) Communication (URLLC) (ICN) (mMTC) Hard Resource Requirement Hard Resource Requirement Network Functions Soft Resource Requirement Network Functions Soft Resource Requirement (Infrastructure sharing) (Infrastructure sharing) Placement (status monitoring for performance guarantee) Placement (status monitoring for performance guarantee) (flexibility) (flexibility) HUAWEI TECHNOLOGIES CO., LTD. Huawei Confjdential 2
Hard Slice Type Example - Mission Cr itical Services Resource MC E2E Coordinator reservation organization criteria | +---------+--------+ | | ^ | | |-----------+-------------+--------+ | | | Resource request | | prioritized resource adjustment MC Network|Slice v dynamic group management +------------+------------+-------------+ Subscriber management | +----------+-------+ +-----------+ | functions | | Group Subs Mgmt |<-->| MC slice | | | | | | Customizer| | – Admission control | +---------+--------+ +-----------+ | – Fast Authentication | | | | +-+ | | | +---------+ + +-->| | – Group Management | +--------+ +-------+ | GRP | | +-+ MC-UE | | GC-1 | | GC-2 | | selector| | +-+ | | subnet | | subnet| +---------+ | --->| | | +--------+ +-------+ | +-+ MC-UE | | | | +----+----------+---------+-------+-----+ | | | | Transport V V V V – Dedicated connectivity and ------------NS transport ---------------- | | | high-availability Infrastructure Mission – 0 packet loss transmission Infra Domain A Domain B Critical server Domain C HUAWEI TECHNOLOGIES CO., LTD. Huawei Confjdential 3
Hybrid Example - Enhanced Broadband (Resource assurance + customization) +----------------------------------+ | E2E Slice Orchestrator | +-----+ | | | +------------------+ | |=>| DASH| | | eMBB Resource | | | +-----+ | +--> | Spec Guard |---+ | +------------+ +-------------+ ----- +-----+ | +-----+ | | +------------------+ | | | Content |<==>| Transcoding |<=> ( ) ==>| CDN |=|=>| HDS | | | | | | | +----------+-------+ | | | Aquisition | | Function | ( ISP ) +-----+ | +-----+ | +--->| Resource Monitor|<--+ | +------------+ +-------------+ (____) | +-----+ | +---------+--------+ | |=>| HLS | | ^ | | +-----+ |-----------+-------------+--------+ Traditional CDN | | Media delivery formats | Real time feed|back | | eMBB | | Network | v dynamic resource adjustment +------------+------------+-------------+ • Assured Quality of content delivery - | +----------+-------+ +-----------+ | | | Acquired Content|<-->| eMBB slice| | Continuous Resource Monitoring | | subnet | | Customizer| | | +---------+--------+ +-----------+ | (Bandwidth/Jitter/Packet Loss) | | | | +-+ • Coordination across different sliced- | | | =======> | | | +--------+ +-------+ | | +-+ handheld subnets connected together | | CDN1 | | CDN2 | | | +---+ | | subnet | | subnet| ========>| | • Same multimedia template for HD video, | +--------+ +-------+ | | +---+ PC | | | | | live video, AR/VR, conference – but | +-----------------+ | | +---------+ different parameters | | Encoders subnet |================+=+====>| | | +-----------------+ | +---------+ TV +----+----------+---------+-------+-----+ HUAWEI TECHNOLOGIES CO., LTD. Huawei Confjdential 4 Sliced CDN
An Ultra-Reliable and Low-Latency Communication Use Case ⑤ OAM Status monitoring, resource tracking, etc. Tenants ① Describe network resources ② Describe slicing requirement A network slice with at most 10 ms one-way E2E latency ④ Isolated and performance guarantee Access Network Transport Network Transport Network Core Network (AN) Domain I (TNI) Domain II (TNII) (CN) ③ Coordinate to construct the network Slice AN 2ms ; TNI 2ms ; TNII 4ms ; CN 2ms Req1: Slicing Resource & Requirement Description Req2: Cross-Domain Coordination HUAWEI TECHNOLOGIES CO., LTD. Huawei Confjdential Req3: Performance Guarantee and Isolation Req4: Network Slicing OAM 5
Req1: Slicing Resource & Requirement D escription performance metrics Tenants protection requirements isolation constraints path restriction (e.g., must pass through some network slicing domain controller points for security) high-availability guidelines (e.g., URLLC service restoration within 10ms, 100ms, or 1 network resources/functions second) etc. Related Work in IETF YANG Data Models CPP template [RFC7297] ACTN (traffic) objectives of Abstract topologies with L2SM, L3SM, EVPN, etc. TE functions and service TE constraints technology-specific management functions Templates for links or resources Conclusion: 1) Lack of resource abstraction and management on Layer 3+ (e.g., routing table) 2) Specification of advanced SFs to be invoked and their invocation order HUAWEI TECHNOLOGIES CO., LTD. Huawei Confjdential 6
Req2: Cross-Domain Coordination network slice resource coordination (e.g., 10ms A common platform for different latency E2E slice 2ms in RAN + 4ms in TN1+ providers/administrators ? 2ms in TN2 + 2ms in CN) network slicing network slicing configuration information coordination (e.g. domain controller domain controller VLAN ID, remote IP address, physical port ID) other coordination (e.g., notify TN about the network network resources/functions resources/functions location of attachment point) Related Work in IETF ACTN GRASP CPNP Multi-domain coordination in autonomic negotiation protocol Dynamic negotiation protocol TE network through a in underlying infrastructure for connectivity provisioning hierarchical MDSC layer (and other service-specific) parameters between customer and provider Conclusion: 1) A flat cross-domain coordination framework 2) Extension on NS specific behaviors and objects HUAWEI TECHNOLOGIES CO., LTD. Huawei Confjdential 7
Req3: Performance Guarantee and I solation performance isolation network network resources/functions resources/functions secure isolation network slice I management isolation network slice II Related Work in IETF DetNet FlexE SR VPN RSVP-TE NVO3 Deterministic data SR-based Complete Logically Layer 2/3 Signal protocol to paths with LSPs provide decoupling of separated service for establish E2E TE extremely low TE features MAC layer and routing/bridgi virtual LSP with bandwidth packet loss rates, physical ng regions reservation networks low delay layer enabling variation and multi- assured maximum tenancy E2E delivery latency over Layer 2 and Layer 3 Conclusion: Tighter coupling between underlay and overlay enhancement to data plane and control plane HUAWEI TECHNOLOGIES CO., LTD. Huawei Confjdential 8
Req4: Network Slicing OAM O perations: keeping all resources associated Per with a network slice up and running (e.g., slice Per Per domain OAM monitoring, identifying problems to a slice OAM service operator) OAM network network A dministration: tracking resource usage within resources/functions resources/functions the provider network as well as within a slice network slice I M aintenance: facilitate repairs and upgrades network slice II within a slice without any impact to other slices. Also involves corrective and preventive measures (e.g., adjusting configuration) Related Work in IETF Technology-Specific OAM tools Overlay OAM SFC OAM [RFC7276] A generic OAM header for Service Function Component: test overlay network OAM [I- IP Ping (IPv4/IPv6) service functions D.ooamdt-rtgwg-ooam- IP Traceroute (IPv4/IPv6) header] Service Function Chain Component: BFD (generic) test service function paths MPLS OAM (MPLS) Classifier Component: test MPLS-TP OAM (MPLS-TP) classifiers (mapping flows to service chains) Pseudowire OAM (Pseudowire) OWAMP and TWAMP (IPv4/IPv6) TRILLA OAM (TRILL) HUAWEI TECHNOLOGIES CO., LTD. Huawei Confjdential 9 Conclusion: Customized granularities NS OAM
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