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<rfc category="info" docName="draft-wang-green-framework-00" ipr="trust200902"
     submissionType="IETF">
  <front>
    <title abbrev="">Framework for Getting Ready for Energy-Efficient
    Networking(GREEN)</title>

    <author fullname="Jing Wang" initials="J." role="editor" surname="Wang">
      <organization>China Mobile</organization>

      <address>
        <postal>
          <street>No.32 XuanWuMen West Street</street>

          <city>Beijing</city>

          <code>100053</code>

          <country>China</country>
        </postal>

        <email>wangjingjc@chinamobile.com</email>
      </address>
    </author>

    <date day="21" month="October" year="2024"/>

    <workgroup>green</workgroup>

    <abstract>
      <t>This document describes a framework for a framework for Getting Ready
      for Energy-Efficient Networking(GREEN).</t>
    </abstract>
  </front>

  <middle>
    <section anchor="introduction" title="Introduction">
      <t>Green has become a global topic. The United Nations and the vast
      majority of governments agree that climate change and the need to curb
      greenhouse gas emissions are the major challenges of our time.
      Therefore, improving energy efficiency and reducing electricity
      consumption are becoming increasingly important for society and many
      industries. The networking industry is no exception. The IETF conducted
      a study on the energy costs of the IETF meeting three times a year. The
      results showed that it was found that 99% of energy consumption came
      from air travel.</t>

      <t>Recently, the GREEN WG was formed. It is chartered to explore use
      cases, derive requirements, and provide solutions for identifying and
      characterizing energy efficiency metrics, methods related to energy
      consumption of network devices, and optimizing energy efficiency across
      the network. network. In addition, there are several papers that discuss
      green networks, and some work <xref target="I-D.cx-green-ps"/>
      summarizes the energy-saving possibilities that exist in the network.and
      <xref target="I-D.wang-cats-green-challenges"/> summarizes a number of
      challenges faced by cats considering green. It has become a hot topic to
      carry out research on web technologies that consider green.</t>

      <t>This document describes a framework for Getting Ready for
      Energy-Efficient Networking(GREEN).</t>
    </section>

    <section anchor="definition-of-terms" title="Definition of Terms">
      <t><list hangIndent="2" style="hanging">
          <t hangText="device">Aiming at comIncludes routers, switches,
          etc</t>

          <t hangText="G-A">An agrent for GREEN, that can collect GREEN
          Metrics.</t>

          <t hangText="Energy-Efficient Management">Energy-Efficient
          Management is a function used to administer a network, with the
          primary purpose of Energy-Efficient management.&#12290;</t>
        </list></t>
    </section>

    <section title="Framework and Components">
      <t><xref target="fig-green-example"/> shows a framework of reference for
      GREEN that addresses the basic requirements raised during the BOF
      discussion<xref target="I-D.stephan-green-bof-reqs-collections"/>.
      Energy Efficiency Management Function is implemented inside the device
      or in a controller.</t>

      <figure anchor="fig-green-example">
        <name>GREEN Framework</name>

        <artwork><![CDATA[
+--------------------------------------------------------------------+
|                     Energy-Efficient Management                    |
+--------------------------------------------------------------------+
                          ^          |
                    Green |          | Control
                   Metrics|          |
                   +-----------+     |
                   |    G-A    |     |
                   +-----------+     |
                          |          |
                          |          v
+--------------------------------------------------------------------+
|                  (1) Device/Component Level                        |
| +---------+  +-----------+  +----------------+  +----------------+ |
| | (I)     |  | (II)      |  | (III)          |  | (IV)           | |
| | Network |  | Device    |  | Legacy Network |  | 'Attached'(PoE | |
| | Device  |  | Component |  | Device         |  | kind) Device   | |
| |         |  |           |  |                |  |                | |
| +---------+  +-----------+  +----------------+  +----------------+ |
+--------------------------------------------------------------------+

]]></artwork>
      </figure>
    </section>

    <section title="GREEN Framework Workflow">
      <t>Geared towards Getting Ready for Energy-Efficient Networking, the
      green metrics include the energy consumption of network devices and so
      on. The following describes how green metrics are distributed under both
      distributed and centralized models.</t>

      <section title="Distributed Model">
        <t><xref target="fig-green-example-overlay"/> shows an example of
        green metric dessimination based on distributed model. In this
        example, the green metrics of the device can be distributed in a
        distributed manner. One of the G-A reports the aggregated green
        indicators to the Energy-Efficiency Management function component.</t>

        <figure anchor="fig-green-example-overlay">
          <name>An Example of Green Metric Dessimination in a Distributed
          Model</name>

          <artwork><![CDATA[

                 :<---------------------:
                 :                      :            
                 :               +---------------+    +----------+
                 :               |    G-A        |----| device 1 |
                 :               +---------------+    +----------+
                 :                      |
                 :                      |
                 :   Green              |
                 :   metrics            |                    
                 : :<---------   +---------------+
 +---------------------+         |    G-A        |    +----------+
 |  Energy-Efficient   |-------- |               |----| device 3 | 
 |      Management     |         +---------------+    +----------+
 +---------------------+                |
                 :                      |
                 :                      |
                 :                      |    
                 :               +---------------+    +----------+
                 :               |    G-A        |----| device 2 |
                 :               +---------------+    +----------+ 
                 :                      :
                 :<---------------------: 

]]></artwork>
        </figure>
      </section>

      <section title=" Centralized Model">
        <t>In <xref target="fig-green-1"/>, green metrics can be distributed
        in a centralized way. In this example, the device's green metrics can
        be reported from G-A to the Energy-Efficiency Management function
        component in a centralized manner.</t>

        <figure anchor="fig-green-1">
          <name>An Example of Green Metric Distribution in a Centralized
          Model</name>

          <artwork><![CDATA[
                          
                                         +----------------+    +----------+
                                      /  |    G-A         |----| device 1 |
                                    /    +----------------+    +----------+
                                  /                |
                                /                  |
                              /       
                            /    Green 
                          /      metrics 
                        /    :<--------- +---------------+
 +---------------------+                 |    G-A        |    +----------+
 |  Energy-Efficient   |-----------------|               |----| device 3 | 
 |      Management     |                 +---------------+    +----------+
 +---------------------+                           |
                       \                           |
                         \                         |
                            \                      |
                               \                   | 
                                  \                |
                                     \             |    
                                        +----------------+    +----------+
                                        |    G-A         |----| device 2 |
                                        +----------------+    +----------+ 


]]></artwork>
        </figure>
      </section>
    </section>

    <section anchor="security-considerations" title="Security Considerations">
      <t>TBD.</t>
    </section>

    <section anchor="iana-considerations" title="IANA Considerations">
      <t>TBD.</t>
    </section>
  </middle>

  <back>
    <references title="Informative References">
      <?rfc include="reference.I-D.cx-green-ps"
?>

      <?rfc include="reference.I-D.wang-cats-green-challenges"?>

      <?rfc include="reference.I-D.stephan-green-bof-reqs-collections"?>
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