module bbf-ancp-fastdsl-threshold {

    yang-version 1.1;

    namespace
      "urn:bbf:yang:bbf-ancp-fastdsl-threshold";

    prefix bbf-ancp-fastdsl-threshold;

    import bbf-yang-types {
      prefix bbf-yang;
    }
    import bbf-ancp {
      prefix bbf-ancp;
    }
    import bbf-ancp-fastdsl-access-extensions {
      prefix bbf-ancp-fastdsl-acc-ext;
    }

    organization
      "Broadband Forum <https://www.broadband-forum.org>
     Common YANG Work Area";

    contact
      "Comments or questions about this Broadband Forum YANG module
     should be directed to <mailto:help@broadband-forum.org>.

     Editor:      Nick Hancock, ADTRAN

     Editor:      Ludwig Pauwels, Nokia

     PS Leader:   Joey Boyd, ADTRAN

     PS Leader:   Sowrirajan Padmanabhan, Nokia

     WA Director: Joey Boyd, ADTRAN

     WA Director: Sven Ooghe, Nokia";

    description
      "This module contains a collection of YANG definitions for
     supporting the Broadband Forum requirements on the Access Node
     Control Protocol (ANCP) as defined in RFC 6320. As such, this
     module is specific to access network equipment (e.g., BBF-
     specified Access Nodes and FTTdp DPUs).

     Specifically, this module augments bbf-ancp to add the data
     nodes to manage line state reporting of the Access Node.

     This data model is designed for the Network Management Datastore
     Architecture defined in RFC 6320. The line state reporting
     requirements are defined in BBF TR-147.

     Copyright (c) 2017-2020, Broadband Forum

     Redistribution and use in source and binary forms, with or
     without modification, are permitted provided that the following
     conditions are met:

     1. Redistributions of source code must retain the above copyright
        notice, this list of conditions and the following disclaimer.

     2. Redistributions in binary form must reproduce the above
        copyright notice, this list of conditions and the following
        disclaimer in the documentation and/or other materials
        provided with the distribution.

     3. Neither the name of the copyright holder nor the names of its
        contributors may be used to endorse or promote products
        derived from this software without specific prior written
        permission.

     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
     CONTRIBUTORS \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES,
     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
     CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

     The above license is used as a license under copyright only.
     Please reference the Forum IPR Policy for patent licensing terms
     <https://www.broadband-forum.org/ipr-policy>.

     Any moral rights which are necessary to exercise under the above
     license grant are also deemed granted under this license.

     This version of this YANG module is part of TR-383a3; see
     the TR itself for full legal notices.";

    reference
      "TR-147";


    revision "2020-10-13" {
      description
        "Amendment 3.
       * Approval Date:    2020-10-13.
       * Publication Date: 2020-10-13.";
      reference
        "TR-383a3: Common YANG Modules
        	  <https://www.broadband-forum.org/technical/download/
        		   TR-383_Amendment-3.pdf>";

    }


    feature delayed-port-up-reporting {
      description
        "Indicates support for the management of the generation of
       Port Up message when the line comes in sync.";
    }

    feature delayed-data-rate-change-reporting {
      description
        "Indicates support for the management of the generation of
       Port Up message when line attributes change.";
    }

    typedef delay {
      type union {
        type uint16 {
          range "1..max";
        }
        type enumeration {
          enum "no-delay" {
            value 0;
            description
              "The action will be taken immediately.";
          }
        }
      }
      units "100 milliseconds";
      description
        "Specifies the delay for taking an action.";
    }

    grouping threshold-setting {
      description
        "The configuration data to be applied to control the
       reporting of changes of the value of line attributes in
       Port Up messages.";
      leaf threshold {
        type bbf-yang:data-rate32 {
          range "1..max";
        }
        units "kbits/second";
        mandatory true;
        description
          "The threshold to be applied to evaluate the
         difference in the line attribute of the interface,
         compared to the previously reported value. A Port Up message
         will be triggered, when the difference in the value of
         the line attribute is equal to or has crossed the threshold
         value.";
        reference
          "TR-147 - R61";

      }

      leaf qualification-period {
        type delay;
        default "no-delay";
        description
          "Sets a qualification period, in which a line attribute value
         must have persistently crossed the configured threshold,
         before a Port Up message is sent that reports the threshold
         crossing.

         Note that this qualification period controls how long a
         line attribute must have crossed a threshold before sending
         a Port Up message, whereas the dampening mechanism
         configured in the container 'bbf-ancp:port-message-control'
         controls the rate at which Port Up messages can be sent to
         the NAS. Therefore, depending on the configuration for the
         dampening mechanism and when the previous Port Up message was
         sent for the given line, the dampening mechanism may delay
         sending the Port Up message reporting the threshold crossing
         past the expiration of the qualification period.";
        reference
          "TR-147 - R60";

      }
    }  // grouping threshold-setting

    grouping port-message-control {
      description
        "Defines the configuration to control the generation of Port Up
       and Port Down messages.";
      leaf initial-port-up-delay {
        if-feature bbf-ancp-fastdsl-threshold:delayed-port-up-reporting;
        type delay;
        default "no-delay";
        description
          "Sets the delay to be applied for generating an ANCP Port Up
         message.

         This delay is applied after the line comes in sync.
         Meaning, when the line changes from state 'out of sync' to
         'in sync', then the line must be continuously 'in sync' for
         that time in order to send the first ANCP Port Up
         message.";
        reference
          "TR-147 - R60";

      }
    }  // grouping port-message-control

    augment /bbf-ancp:ancp/bbf-ancp:partitions/bbf-ancp:partition/bbf-ancp:port-message-control {
      description
        "Augments the ANCP partition data with data to control
       generating ANCP Port Up and Port Down messages.";
      container vdsl {
        when
          "../../bbf-ancp:technology = "
            + "'bbf-ancp-fastdsl-acc-ext:fastdsl'" {
          description
            "To configure port message control specific to VDSL access
           lines, the technology of the partition must be FastDSL.";
        }
        description
          "Additions for controlling the generation of ANCP Port Up
         and Port Down messages.";
        uses port-message-control;

        list data-rate-report {
          if-feature bbf-ancp-fastdsl-threshold:delayed-data-rate-change-reporting;
          must
            'derived-from-or-self(access-line-attribute, '
              + '"bbf-ancp-fastdsl-acc-ext:'
              + 'actual-net-data-rate-upstream")'
              + ' or '
              + 'derived-from-or-self(access-line-attribute,'
              + '"bbf-ancp-fastdsl-acc-ext:'
              + 'actual-net-data-rate-downstream")'
              + ' or '
              + 'derived-from-or-self(access-line-attribute,'
              + '"bbf-ancp-fastdsl-acc-ext:'
              + 'attainable-net-data-rate-upstream")'
              + ' or '
              + 'derived-from-or-self(access-line-attribute,'
              + '"bbf-ancp-fastdsl-acc-ext:'
              + 'attainable-net-data-rate-downstream")';
          key "access-line-attribute";
          description
            "Sets configuration data controlling the reporting of data
           rate changes via ANCP Port up messages in a data-rate-
           specific access line attribute.";
          leaf access-line-attribute {
            type identityref {
              base bbf-ancp-fastdsl-acc-ext:vdsl-access-line-attribute;
            }
            description
              "An access line attribute for which changes in the value
             shall be reported.";
            reference
              "RFC 6320 section 6.5.1";

          }

          container shift-up {
            description
              "The configuration data to be applied to control the
             reporting of positive changes of the line attribute in
             ANCP Port Up messages.";
            uses threshold-setting;
          }  // container shift-up

          container shift-down {
            description
              "The configuration data to be applied to control the
             reporting of negative changes of the line attribute in
             ANCP Port Up messages.";
            uses threshold-setting;
          }  // container shift-down
        }  // list data-rate-report
      }  // container vdsl

      container fast {
        when
          "../../bbf-ancp:technology = "
            + "'bbf-ancp-fastdsl-acc-ext:fastdsl'" {
          description
            "To configure port message control specific to FAST access
           lines, the technology of the partition must be FastDSL.";
        }
        description
          "Additions for controlling the generation of ANCP Port Up
         and Port Down messages.";
        uses port-message-control;

        list data-rate-report {
          if-feature bbf-ancp-fastdsl-threshold:delayed-data-rate-change-reporting;
          must
            'derived-from-or-self(access-line-attribute, '
              + '"bbf-ancp-fastdsl-acc-ext:'
              + 'actual-net-data-rate-upstream")'
              + ' or '
              + 'derived-from-or-self(access-line-attribute,'
              + '"bbf-ancp-fastdsl-acc-ext:'
              + 'actual-net-data-rate-downstream")'
              + ' or '
              + 'derived-from-or-self(access-line-attribute,'
              + '"bbf-ancp-fastdsl-acc-ext:'
              + 'attainable-net-data-rate-upstream")'
              + ' or '
              + 'derived-from-or-self(access-line-attribute,'
              + '"bbf-ancp-fastdsl-acc-ext:'
              + 'attainable-net-data-rate-downstream")';
          key "access-line-attribute";
          description
            "Sets configuration data controlling the reporting of data
           rate changes via ANCP Port up messages in a data-rate-
           specific access line attribute.";
          leaf access-line-attribute {
            type identityref {
              base bbf-ancp-fastdsl-acc-ext:fast-access-line-attribute;
            }
            description
              "An access line attribute for which changes in the value
             shall be reported.";
            reference
              "RFC 6320 section 6.5.1";

          }

          container shift-up {
            description
              "The configuration data to be applied to control the
             reporting of positive changes of the line attribute in
             ANCP Port Up messages.";
            uses threshold-setting;
          }  // container shift-up

          container shift-down {
            description
              "The configuration data to be applied to control the
             reporting of negative changes of the line attribute in
             ANCP Port Up messages.";
            uses threshold-setting;
          }  // container shift-down
        }  // list data-rate-report
      }  // container fast
    }
  }  // module bbf-ancp-fastdsl-threshold