lpwan                                                             B. Liu
Internet-Draft                                                  M. Zhang
Intended status: Informational                       Huawei Technologies
Expires: January 4, 2018                                      C. Perkins
                                                               Futurewei
                                                            July 3, 2017


                            WiSUN use cases
                      draft-liu-wisun-use-cases-00

Abstract

   This draft presents several use cases in which WiSUN technology can
   be applied, including Advanced Metering Infrastructure and
   Intelligent Street Lights.  The draft can stand alone as an
   independent draft, but also represents a potential contribution to
   the "WiSUN overview" section of [I-D.ietf-lpwan-overview].

Status of This Memo

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   This Internet-Draft will expire on January 4, 2018.

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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Use Cases . . . . . . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  Advanced Metering Infrastructure  . . . . . . . . . . . .   3
     3.2.  Intelligent Street Lights . . . . . . . . . . . . . . . .   4
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   5.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   5
     5.1.  Normative References  . . . . . . . . . . . . . . . . . .   5
     5.2.  Informative References  . . . . . . . . . . . . . . . . .   5
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   5

1.  Introduction

   WiSUN [RFC2119] is an established suite of IoT technologies that is
   based on IEEE 802.15.4, TCP/IP, and related standard protocols.
   Important characteristics of WiSUN include the following:

   Coverage
      Range measured in kilometers

   Development Ecosystem
      WiSUN Alliance with task groups for targeted use cases and assured
      interoperability

   High Bandwidth
      Up to 300 kbps

   Low Latency
      0.02 seconds

   Mesh Routing
      Resilient and scalable

   Power Efficiency
      less than 2 uA when resting; 8 mA when listening

   Scalability
      Networks to 5,000 devices; 10 million endpoints worldwide

   Security
      Public key certificates, AES, HMAC, dynamic key refresh, hardened
      crypto




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2.  Terminology

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in
   [RFC2119].  Additionally, this document uses the following terms:

   AMI
      Advanced Metering Infrastructure

   B-LLN
      Building Automation LLN

   CAN
      Campus or Corporate Area Network

   I-LLN
      Industrial LLN

   LLN
      Low-power, lossy network

   U-LLN
      Urban LLN

   WiSUN
      Wireless Smart Utility Network

3.  Use Cases

3.1.  Advanced Metering Infrastructure

   Advanced metering infrastructure (AMI) is an integrated system of
   smart meters, communication networks and data management
   applications.  The coverage of Wi-SUN signal is typically 2~3 km,
   matching the needs of neighborhood area networks, campus area
   networks, or corporate area networks (CAN).  AMI can use Wi-SUN as
   the single technology to read various types of meters (electricity,
   gas, water) within one network.

   Besides the daily or monthly meter reading for bill charging,
   customers also desire to have a more frequent meter reading to build
   detailed consumption reports.  For such scenarios, the sampling rate
   of AMI can be once every 10 minutes or even more.  Wi-SUN devices are
   designed for frequent communications (as often as every 10 seconds),
   satisfying AMI's requirement on sampling rate.  Moreover, the MAC MTU
   of 2047 bytes of Wi-SUN supports the aggregation of locally cached
   samples into a single packet, which can then be uploaded far less



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   often (e.g. daily).  A battery-powered Wi-SUN device can last for up
   to 10 years without needing battery replacement.

   Wi-SUN's symmetric uplink/downlink capability and data rate (up to
   300kbps) allow interactive communications between end devices and
   gateways.  Customers are able to read their meters and get a timely
   response.  When an outage occurs, the operator can interactively
   "ping" each meter to verify its status, so that the trouble spots can
   be diagnosed.  For these two cases, the meters should respond in
   real-time.

3.2.  Intelligent Street Lights

   Enabling Intelligent Street Lights is an important use for urban IoT.
   Various end devices can be integrated in a single street light pole
   for the purposes of adaptive lighting, environment monitoring,
   utility management, advertising and so on.

   Wi-SUN supports a high duty cycle enabling frequent data transmission
   -- as often as once every 10 seconds.  With Wi-SUN, sensors such as
   temperature, humidity and air quality mounted on a light pole can
   maintain a high sampling rate.  Wi-SUN's large MTU (2047 bytes) also
   allows data from different sensors to be packed within a single
   packet.

   As an example for utility management, in the current trash
   collection, the sanitation workers have to pass by to check each
   trash can periodically.  Since the workers cannot tell whether a can
   contains any trash, sometimes they come by only to find that the can
   is empty.  If sensors are deployed in the cans, the workers will be
   informed before attempting collection.  Given detailed information
   about the quantity and type of trash , the right type of vehicle can
   be sent for collection, and an efficient schedule and path can be
   planned.  Such on-demand collection can reduce the operations cost of
   sanitation companies.  The communication devices in the trash cans
   would be powered by battery, and their life time should be long
   enough to minimize the need for battery replacement.  In order to
   save energy, the device is activated only when needed; otherwise it
   is in deep sleep mode.  Battery powered Wi-SUN devices can last for
   years due to low power consumption.  The range of Wi-SUN can be 2~3km
   in line of sight, so that a gateway mounted on a light pole would
   cover the end-devices in a district area.  If a physical obstruction
   exists, the range can be extended by multi-hop connection between
   mains powered Wi-SUN gateways.







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4.  Security Considerations

   Security is a core concern for many IoT/lpwan networks.  Compromised
   devices can be used to mount attacks on other networks, resulting in
   disruption of essential services (as would be the case for critical
   IoT networks used for public safety) or costly technology
   replacements.  Networks based on WiSUN can provide excellent security
   by offering a number of standardized and powerful features such as
   Public Key Infrastructure certificates, 802.11i, AES, HMAC, and
   others as described in [citation required].

5.  References

5.1.  Normative References

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119,
              DOI 10.17487/RFC2119, March 1997,
              <http://www.rfc-editor.org/info/rfc2119>.

5.2.  Informative References

   [I-D.ietf-lpwan-overview]
              Farrell, S., "LPWAN Overview", draft-ietf-lpwan-
              overview-05 (work in progress), July 2017.

Authors' Addresses

   Bing Liu (Remy)
   Huawei Technologies
   No. 156 Beiqing Rd. Haidian District
   Beijing  100095
   China

   Email: remy.liubing@huawei.com


   Mingui Zhang
   Huawei Technologies
   No. 156 Beiqing Rd. Haidian District
   Beijing  100095
   China

   Email: zhangmingui@huawei.com







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   Charles E. Perkins
   Futurewei
   2330 Central Expressway
   Santa Clara  95050
   United States

   Email: charliep@computer.org












































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