Applicability Of TSN To 5G Services - IEEE
Applicability of TSN to 5G services Tongtong Wang, Xinyuan WangHuawei TechnologiesHUAWEI TECHNOLOGIES CO., LTD.IEEE 802.1 TSN Chicago, March 2018
Background Conclusion from ITU-T/IEEE joint workshop, gives the followingsuggestion that TSN applicability for 5G services shall be Building%20Tomorrow%20Networks-Final.pdfHUAWEI TECHNOLOGIES CO., LTD.2
5G Connects EverythingeMBB, Enhanced MobileBroadbandGbps3D video, and ultra HD screenCloud-based work and play.Smart Home andconstructionAugmented reality (AR)Industrial automationSmart CityThe future IMTCritical applicationAutopilotmMTC, Massive Machine TypeCommunicationHUAWEI TECHNOLOGIES CO., LTD.uRLLC, Ultra-Reliable and Low-LatencyCommunication4
New Challenges to 5G Bearer Architecture1 tionsPer km2High-speedRailwaySlicing TSN techniques can help Most of uRLLC services have E2E bounded latency requirement. Network slicing implies no interference between applications or users.HUAWEI TECHNOLOGIES CO., LTD.5AbilityRequired
3GPP TS 22.261: low-latency and high-reliability scenariosScenarioEnd-toendlatency(note 3)1 msJitterSurvivaltimeReliability(note 4)Userexperienceddata ratePayloadsize(note 5)Trafficdensity(note 6)Connectiondensity(note 7)Service areadimension(note 8)0 msCommunicationserviceavailability(note 4)99,9999%1 µs99,9999%Small1 Tbps/km2100 000/km2100 x 100 x 30 m100 µs0 ms99,99%99,99%1 Mbpsup to 10Mbps10 Mbps10 msSmall to big1 Tbps/km2100 000/km21000 x 1000 x 30 mProcess automation –remote control50 ms20 ms100 ms99,9999%99,9999%Small to big100 Gbps/km21 000/km2300 x 300 x 50 mProcess automation ‒monitoringElectricity distribution –medium voltageElectricity distribution –high voltage(note 2)Intelligent transportsystems –infrastructure backhaul50 ms20 ms100 ms99,9%99,9%1 Mbpsup to 100Mbps1 MbpsSmall10 Gbps/km210 000/km2300 x 300 x 5025 ms25 ms25 ms99,9%99,9%10 MbpsSmall to big10 Gbps/km21 000/km25 ms1 ms10 ms99,9999%99,9999%10 MbpsSmall100 Gbps/km21 000/km2(note 9)100 km along powerline200 km along powerline10 ms20 ms100 ms99,9999%99,9999%10 MbpsSmall to big10 Gbps/km21 000/km22 km along a roadTactile interaction(note 1)Remote control0,5 C[5 ms]TBCTBC[99,999%][99,999%][From low to10 Mbps][Small to big][Low][Low]TBCDiscrete automation –motion control(note 1)Discrete automationNOTE 1:Traffic prioritization and hosting services close to the end-user may be helpful in reaching the lowest latency values.NOTE 2:Currently realised via wired communication lines.NOTE 3:This is the end-to-end latency the service requires. The end-to-end latency is not completely allocated to the 5G system in case other networks are in the communication path.NOTE 4:Communication service availability relates to the service interfaces, reliability relates to a given node. Reliability should be equal or higher than communication service availability.NOTE 5:Small: payload typically 256 bytesNOTE 6:Based on the assumption that all connected applications within the service volume require the user experienced data rate.NOTE 7:Under the assumption of 100% 5G penetration.NOTE 8Estimates of maximum dimensions; the last figure is the vertical dimension.NOTE 9:In dense urban areas.NOTE 10:All the values in this table are targeted values and not strict requirements.According to scenarios from 3GPP, bounded latency and jitter shall be ensured in uRLLC servicesHUAWEI TECHNOLOGIES CO., LTD.6
Networking Slicing Defined in 3GPP In TR 23.799: The network slice is a complete logical network (providingTelecommunication Services and Network Capabilities) including AN (RANAccess Network) and CN (Core Network).Whether RAN is sliced is up to RANWGs to determine: AN can be common to multiple network slices. Network slices may differ for features supported and Network Functions optimisations use cases. Networks may deploy multiple Network slice instances delivering exactly the same optimisationsand features as per but dedicated to different groups of UEs, e.g. as they deliver a differentcommitted service and/or because they may be dedicated to a customer.Slice #1HUAWEI TECHNOLOGIES CO., LTD.eMBB SliceVPN1VPN2VPN3uRLLC SliceSlice #2mMTC SliceSlice #37
Forwarding Plane For Bounded Latency Traffic Choice A: Ensure average bandwidth for long term traffic in softpartitioning network, bounded E2E latency is achievable. E2E planning with simple Qos scheduling. TSN scheduling algorithms. Others.Option 1Choice B: Guarantee strict bandwidth in hard partitioning network Dedicate devices and links. Std 802.1Qbv support up to 8 time slices at port level. Others.Option 2.HUAWEI TECHNOLOGIES CO., LTD.10
TSN flow Aggregation in 5G Bearer Network TSN techniques are necessary for bounded latency services in 5G bearernetwork, we like to consider it more carefully from perspective of larger scaleand converged IP network. Large scale and converged network means multi-hop , flexible topology and bignumber of traffic flows. Current IP network uses DiffServ model for the sake of efficiency, while TSNresource reservation and scheduling is more like IntServ model. Flowaggregation helps reduce number of IntServ flows, need more discussion instandard.Flow aggregation illustrationHUAWEI TECHNOLOGIES CO., LTD.11
Scheduling Algorithms in 5G Bearer Network 802.1CM as an example: strict priority scheduling with E2E traffic planning providesbounded latency. This achieve lowest latency with network planning, preemptioncan further help reduce port delay . Easy deployment.Limitation: Increasing number of CPRI flows in bridge enlarge worstforwarding delay per hop.HUAWEI TECHNOLOGIES CO., LTD.12
Scheduling Algorithms in 5G Bearer Network Current algorithm described in P802.1Qcr is not easy for bridges inbearer network Direct comparison of n bit eligibility time is costly for high speed port.Other async scheduling approaches Unsync-ed scheduled traffic with internal buffering.Local time gate schedulingLTWorst case queueing latency 8*time slot width; Paternoster SimilarWorst case latency 3*epochHUAWEI TECHNOLOGIES CO., LTD.13
Summary TSN techniques are necessary for 5G uRLLC applications andnetwork slicing in 5G bearer network. Topics to further investigate Flow aggregation Scheduling methods for large number of TSN flows , queues andphysical ports. Would any one like to join discussing profiles for 5G bearernetwork solution, please come together.HUAWEI TECHNOLOGIES CO., LTD.14
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TSN flow Aggregation in 5G Bearer Network TSN techniques are necessary for bounded latency services in 5G bearer network, we like to consider it more carefully from perspective of larger scale and converged IP network. Large scale and converged network means multi-hop , flexible topology and big number of traffic flows.
related to the TSN adoption for EtherNet/IP technology. For example in [4], the author suggests the "Time Bridge" and "TSN Adapter" for migrating the installed baseto a TSN infrastructure. This paper also highlighted some key TSN technologies such as timing, preemption, scheduling, and configuration, which
PORT 1 PORT 2 SWITCH END POINT TAS PHY TAS MAC MAC TAS ROBOT CONTROLLER APPLICATION PHY PORT 1 PORT 2 . multi core Cortex A9/A53 Real Time Processing Unit High Speed . SYSTEM PROGRAMMABLE LOGIC TSN Switch MAC MAC TSN Endpoint gPTP Driver Linux API TSN Subsystem LogiCORE IP O Single Chip with Application Processor and TSN XILINX PROVIDE .
The IIC's TSN Testbed for Flexible Manufacturing Testbed applies TSN technology to a manufacturing system to support the type of manufacturing application found in production environments and to display its capabilities and value. TSN BENEFITS TSN provides benefits to aut omation and c ontrol vendors as well as end customers, including:
TSN - Mechanisms and interdependencies TSN extends Ethernet-based data communication with novel mechanisms to provide determinism. This is done on such a level of performance that TSN can satisfy even the most demanding requirements of modern control networks, e.g. in industrial automation, automotive manufacturing and in-vehicle networks.
The overwhelming strength of TSN is its status as an open and standard technology, unaffiliated to any organization or company. For an industrial automation market that has struggled for many years with multiple incompatible proprietary communication protocols, TSN brings a number of benefits: TSN guarantees compatibility at the network level
tsn-nfinn-control-and-config-0515-v03.pdf IEEE 802.1 plenary, Berlin DE, March 2015 2 This contribution is in response to the excellent analyses presented in cc-goetz-MRPv2-MSP-v13, cc-goetz-Next-Steps-v1, and tsn-sexton-feature-priority-request. It is an attempt to map the shortest route from the current state of the IEEE
III) and TSN (Section IV). Our contribution is a qualitative comparison of how efficiently TSN and SDN address the requirements of Industry 4.0 (Section V). II. INDUSTRY 4.0 COMMUNICATION REQUIREMENTS Industry 4.0 means the large scale application of Infor-mation and Communication Technologies (ICT) to industrial production systems.
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