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Day 2-t7-1730 xiaobao-chen-20120524
 

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LTE World Summit Barcelona May 2012 Day 2

LTE World Summit Barcelona May 2012 Day 2

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    Day 2-t7-1730 xiaobao-chen-20120524 Day 2-t7-1730 xiaobao-chen-20120524 Presentation Transcript

    • Supporting M2M Services over LTE Challenges & Solution Xiaobao Chen France Telecom 24 May 2012
    • Outline M2M: towards the future of a smart society  From M2M to Internet of Things: Smart Home/Smart City  M2M Services and Connectivity  M2M Over LTE Challenges & Solutions  Overload & Congestion Control in Network  Identifier & Addressing Shortage  M2M Device & Traffic Management in Roaming  HLR/HSS Overload Summary LTE World Summit, 23 & 24 May 2012 France Telecom Group
    • 1 M2M: towards the future of a Smart Society  From M2M to Internet of Things: Smart Home/Smart City  M2M Services and Connectivity  M2M over LTE LTE World Summit, 23 & 24 May 2012 France Telecom Group
    • M2M: toward a Smart Society Now & Next DecadeM2M in Enterprises: M2M in a Smart City M2M in Digital Automation in Life:: to optimize the control process, connecting people and machines Internet of Things/Virtual Things:improve management efficiency for a better, healthier and saferand accuracy and drive cost societyreduction • smart metering & grids • live product information• equipment monitoring • connected car • personalized objects• asset tracking • consumer devices • augmented reality• fleet management • home automation • customer communities• supply chain optimization • health • remote diagnostic• inventory management • cross-selling • ownership history at home in city Tracking health remote monitoring/diagnosisNFC Phone Surveillance in car Everything everywhere LTE World Summit, 23 & 24 May 2012 France Telecom Group
    • M2M: Market Predictions Operators: opened M2M business units to focus on the M2M service rolling out by end of 2011.  North America,  Europe  Asia-Pacific. M2M Forecasted Growth millions 600 ~400 400 M2M 200 ~160 Devices 0 2011 2016 M2M Devices: to reach 50 billion by 2020 Cellular Connections:  2011:110 million connections in 2011 to  2016 (approximately) 365 million connections.  The annual growth rate of roughly 27%. Revenues:  $35 billion in connectivity services revenue by 2016 LTE World Summit, 23 & 24 May 2012 France Telecom Group
    • M2M: The Service and Connectivity  M2M Service Scenarios with Access/Networks: MTC Devices Operator domain MTC ServerMTC Devices User Operator Domain Operator domain A Operator domain B User API MTC Server MTC Devices MTC Devices LTE World Summit, 23 & 24 May 2012 France Telecom Group
    • LTE Suitable for M2M ? 2G 3G LTE  packet only, toward full IP and Core Packet Packet convergence with fixed accesses fornetwork Packet Circuit Circuit ubiquitous M2M connectivity and “unlimited” adddressing space (IPv6) RNC  flat architecture simplified controlAccess BSC LTE and much improved QoS (muchnetwork NodeB eNodeB BTS reduced delay)  new radio interface, with — various bandwidth (from 1.4 to 20 MHz) — improved efficiency compared to 3G (high throughput UL&DL, lower latency, higher cell capacity), providing tens of Mbps for a 20 MHz channel  backward terminal compatibility enables M2M services migration with low-cost (comparable to M2M over 2G) LTE World Summit, 23 & 24 May 2012 France Telecom Group
    • Mobile Network Support for M2M SMS_SC/ GMSC/ IP-SM-GW IWMSC GERAN T4 CDF/CGF HSS S6m Rf/Ga UserMTC Devices GPRS T5 (TBD) MTC-IWF Tsp API UTRAN M2M App.s. G/SGi Service Comptabilities GGSN/PDG E- UTRAN Evolved Packet Core EPC (Evolved Packet Core) SGi / Gi / Wi Trusted non - 3 GPP For managing the MTC Connections between MTC Server and Devices: IP access - GPRS and EPS Bearers (PS only) with GERAN/UTRAN/EUTRAN Accesses Untrusted • Reference Points for User Plan: Tsp, SGi, Gi, Wi non - 3 GPP IP access - SMS based MTC Communication • MTC Server uses SMS via MTC-IWF to connect to SMS SC for MTC Device Triggering. - MTC Signaling: • Reference Points for Control Plane: Tsp for Device Triggering LTE World Summit, 23 & 24 May 2012 France Telecom Group
    • 2 M2M: Challenges and Solutions  Overload & Congestion Control in Network  Identifier & Addressing Shortage  M2M Device & Traffic Management in Roaming  HLR/HSS Overload LTE World Summit, 23 & 24 May 2012 France Telecom Group
    • Mobile Network to be optimised for M2M The general requirements: Mobile Networks are defined for optimal support of Human to Human (H2H) communications such as voice and other multimedia services, characterised by high levels of * Interactiveness, * Real-timeliness * Mobility * Security and Privacy. * Long session duration and/or large amounts of data. * Intelligent interactions and complicated applications (e.g. smartphones) * Global Access (e.g. roaming) The Traffic from M2M services characterised by: * Sporadic communication of short duration. * Small amount of data with low bandwidth requirements (for many MTC devices). * Low or no mobility and low activity. * Large groups of M2M devices with simultaneous connections requests. * Low low energy consumption * Low processing power and low-cost/simple devices. * Data security. LTE World Summit, 23 & 24 May 2012 France Telecom Group
    • Mobile Network Support for M2M: Challenges Overload & Congestion Control in the Access & Core Network MTC devices are capable of generating large amount of signalling that can cause network overload, at least, in the following two situations.  An M2M application (running in many UE’s) requests many UE’s to do “something” (e.g. Attach/Connect requests) by the network at the same time.  Many roaming UE’s (in-roamers) all move onto and subsequently overload the local networks when their serving network fails. These Lead to serious downgrading the network performance, causing even network outrages and the QoS/End-user experiences of high value services such as voice and other IP multimedia services. Identifiers & Addressing shortage:  Fast increase of MTC devices lead to the shortage of IMSI and MSISDN, as already indicated by national regulatory bodies  IPv4 address space exhaustion. M2M Device and Traffic Management in Roaming  Simultaneous PLMN Access by a large number of M2M Devices.  M2M Traffic Differentiation HLR/HSS Overload  Simultaneous “Registration” request by M2M Devices Groups LTE World Summit, 23 & 24 May 2012 France Telecom Group
    • 3GPP Network Improvement for Machine Type Communication (MTC) Congestion and Overload Control mechanisms:  UEs configured with the following options to use • Low Access Priority, and/or • Extended Access Barring • MS configured to perform Attach with IMSI at PLMN change; and/or a long minimum periodic PLMN search time limit , etc  CN can request a RAN node to restrict load from • UEs that provide the “Low access priority” • UEs that re-select from another PLMN  Mechanisms for the SGSN and GGS/PGW to detect and handle congestions associated with a particular APN  Back-off timers may be added to rejection messages  Long periodic location update value provided to UE  Throttling of the Downlink Data Notification requests • for DL low priority traffic bound to UEs in idle mode. LTE World Summit, 23 & 24 May 2012 France Telecom Group
    • M2M Overload Control in UTRAN  UE can be assigned with “Low Access Priority*” to differentiate low priority/delay tolerant MTC signalling  In GERAN, Extended Access Barring (EAB) can be initiated in a given cell by SGSN or GERAN O&M. An MS configured to support EAB can read system information to acquire EAB related information to be used with its Access Class to determine if it can attempt a system access. (TS22.011)  UE with “delay tolerant access “ receives RRC Connection Release (CELL_FACH, CELL_DCH, CELL_PCH): the IE of Extended Wait Time” is sent to the upper layer to postpone the RRC connection.. 1) Overload at CN 2) Overload at UTRAN RNC CN RNC CN OVERLOAD OVERLOAD An overload message is sent from CN to RAN. Over at RAN: an overload message is sent from RAN to If the Priority Class Indicator IE is included, CN to indicate the RAN is unable to send signalling to UE. then RAN should take the appropriate action If the Priority Class Indicator is included in the IE, the to reduce the traffic for the priority class indicated message is ignore by the CN. in the IE.*not applied for all emergency connections, RRC connection for Paging, and other cases in TS24.008 LTE World Summit, 23 & 24 May 2012 France Telecom Group
    • M2M Overload Control in LTE/EPC  UE can be assigned with “Low Access Priority*” to differentiate low priority/delay tolerant MTC signalling  RRC Connection establishment from a UE with low access priority can be indicated to the EUTRAN.  RRC signalling has the capability of providing extended wait timers when rejecting messages.  The MME can initiate rejection of RRC connection establishments in the E-UTRAN. eNB MME eNB MME OVERLOAD START OVERLOAD STOP The eNB receiving the OVERLOAD START message from an overloaded MME containing the “reject RRC connection establishments for signalling with delay tolerant access indication, eNB shall reduce the signalling. The eNB receiving the OVERLOAD STOP message shall assume normal operations towards MME.*not applied for all emergency connections, RRC connection for Paging, LTE World Summit, 23 & 24 May 2012 and other cases in TS24.008 France Telecom Group
    • M2M Device Addressing IP addressing: to enable a MTC server in a public addressing domain to send messages to a MTC device in a private addressing domain. - IPv6 addressing: both MTC server and MTC device are assigned IPv6 addresses - IPv4 addressing: - the MTC server in the public IPv4 addressing domain and the MTC device is assigned a private IPv4 address by the MNO. - Both the MTC server and the MTC device use private IPv4 addresses. Private Address Space Public Address Space Mobile Network Operator M2M server M2M device E.164 Numbering Shortage & Solutions  E.164 Numbering Shortage Solution - E.164 based numbering is running short due to fast increase of M2M based services. - SA1 Studies: on-going - The midterm solution: extend the numbering to its maximum length (15 digits). To be supported by NL, ESP, B, FR. SWD. - The long term solution: IPv6 address, not to be mixed with MTC device identifier. LTE World Summit, 23 & 24 May 2012 France Telecom Group
    • M2M Device Identifier Identifier: uniquely identifies and enables the MTC device subscription without MSISDN  External Identifier: Used by MTC Servers outside the 3GPP network, to identify and trigger a UE with MTC using a subscription or the subscription itself when UE is not registered. , e.g. at the MTCsp and MTCsms interfaces. Possible external identifier include IMSI, or E.164 MSISDN, together with a static hostname (i.e. FQDN identifier specific to an MTC device)  Internal Identifier: Used within the 3GPP system to uniquely identify a UE used for MTC. In Rel-11, IMSI is the internal identifier for mapping to/from an external. This identifier is not necessarily known by the MTC Server.  Identifier mapping: - An internal identifier (IMSI) used in 3GPP network is mapped to/from an external identifier. - Multiple external identifiers can be mapped to a single internal identifier. - The identifier used by the MTC User in the triggering request to the MTC Server can be a different identifier than the one used by the MTC Server in the triggering request to the PLMN.  Other uses of identifiers: MTC group identifier - A dedicated APN or a MTC Group Identifier are possible identifiers to indicate particular large scale MTC applications to control their behaviour (e.g. attach and connection requests to the network). LTE World Summit, 23 & 24 May 2012 France Telecom Group
    • M2M Device & Traffic Management in Roaming Network Overload Control  Delayed and Failed visited PLMN Discovery and Selection lead to simultaneous access to alternative networks by (large number of ) roaming M2M Devices and, without control, cause network congestion and breakdown.  Protection of the network in case of aberrant behaviour in roaming scenarios • UE’s configured with a long minimum periodic PLMN search time limit • UE’s configured to perform Attach with IMSI at PLMN change Traffic Transparency needed (in ref. GSMA BA.48) Short term solutions: - M2M traffic specific APN’s - APN’s exchanged via IR.21 (Roaming Database, Structure, Updating Procedures) - No network control or service level visibility Long term solutions: 3GPP standard based MTC identifier/network control solutions OEM develop device transparency ESTI define the service classes. LTE World Summit, 23 & 24 May 2012 France Telecom Group
    • HLR/HSS Overload No M2M provisioning in HLR e.g. EM devices in cars. The group behaviour of M2M devices: simultaneous attempt to connect to network and with periodic authentication every minute from the same device due to the late response. Overloading to the HLR  HLR/HSS sequential processing may delay the simultaneous registration requests due to overloading conditions.  Aggravated due to the periodic repeated attempts by the M2M devices.  Downgraded the network/service performance. Possible Solutions  M2M specific provisioning and control of HLR. LTE World Summit, 23 & 24 May 2012 France Telecom Group
    • Summary  M2M will drive and intensify the usage of fixed/mobile network connectivity for a connected and automated life and work style in a Smart Society  New opportunities and challenges affect a wide range of industries on a unprecedented scale: telco, car, utility, healthcare, public services, domestic appliance, media, banking/commercial services etc.  Telco/Mobile industry are embracing the opportunities and challenges.  M2M: A new breed of “killer” applications to drive further enhancements of 4G networks. LTE World Summit, 23 & 24 May 2012 France Telecom Group
    • Thank you !together we can do more. LTE World Summit, 23 & 24 May 2012 France Telecom Group