hash stringlengths 32 32 | doc_id stringlengths 7 13 | section stringlengths 3 121 | content stringlengths 0 2.2M |
|---|---|---|---|
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.2 Dynamic Service Flow Changes | |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.2.0 Overview | Service Flows may be created, changed or deleted. This is accomplished through a series of MAC management messages referred to as Dynamic Service Addition (DSA), Dynamic Service Change (DSC) and Dynamic Service Deletion (DSD). The DSA messages create a new Service Flow. The DSC messages change an existing Service Flow.... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.2.1 Dynamic Service Flow State Transitions | The Dynamic Service Flow State Transition Diagram, figure 11.2, is the top-level state diagram and controls the general Service Flow state. As needed, it creates transactions, each represented by a Transaction state transition diagram, to provide the DSA, DSC, and DSD signalling. Each Transaction state transition diagr... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.2.2 Dynamic Service Addition | |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.2.2.1 CM Initiated Dynamic Service Addition | A CM wishing to create an upstream and/or a downstream Service Flow sends a request to the CMTS using a dynamic service addition request message (DSA-REQ). The CMTS checks the CM's authorization for the requested service(s) and whether the QoS requirements can be supported and generates an appropriate response using a ... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.2.2.2 CMTS Initiated Dynamic Service Addition | A CMTS wishing to establish an upstream and/or a downstream dynamic Service Flow(s) with a CM performs the following operations. The CMTS checks the authorization of the destination CM for the requested class of service and whether the QoS requirements can be supported. If the service can be supported the CMTS generate... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.2.2.3 Dynamic Service Addition State Transition Diagrams | Figure 11.11: DSA-Locally Initiated Transaction Begin State Flow Diagram ETSI ETSI TS 103 311-3 V1.1.1 (2017-02) 435 Figure 11.12: DSA-Locally Initiated Transaction DSA-RSP Pending State Flow Diagram ETSI ETSI TS 103 311-3 V1.1.1 (2017-02) 436 Figure 11.13: DSA-Locally Initiated Transaction Holding State Flow Diagram E... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.2.3 Dynamic Service Change | |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.2.3.0 General | The Dynamic Service Change (DSC) set of messages is used to modify the flow parameters associated with a Service Flow or a set of Upstream Drop Classifiers. Conceptually, Upstream Drop Classifiers are associated with a NULL Service Flow that is not signalled in the messages. Specifically, DSC can: • Modify the Service ... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.2.3.1 CM-Initiated Dynamic Service Change | A CM that needs to change a Service Flow definition performs the following operations. The CM informs the CMTS using a Dynamic Service Change Request message (DSC-REQ). The CMTS shall decide if the referenced Service Flow can support this modification. The CMTS shall respond with a Dynamic Service Change Response (DSC-... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.2.3.2 CMTS-Initiated Dynamic Service Change | A CMTS initiated DSC transaction that is changing Upstream Drop Classifiers does not require the CMTS to send a DSC-ACK after receiving a DSC-RSP from the CM. This is different from a CMTS initiated DSC transaction that is modifying a Service Flow and results from the fact that the CM cannot send a DSD if the transacti... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.2.3.3 Dynamic Service Change State Transition Diagrams | Figure 11.23: DSC-Locally Initiated Transaction Begin State Flow Diagram ETSI ETSI TS 103 311-3 V1.1.1 (2017-02) 445 Figure 11.24: DSC-Locally Initiated Transaction DSC-RSP Pending State Flow Diagram ETSI ETSI TS 103 311-3 V1.1.1 (2017-02) 446 Figure 11.25: DSC-Locally Initiated Transaction Holding Down State Flow Diag... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.2.4 Dynamic Service Deletion | |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.2.4.0 General | Any service flow can be deleted with the Dynamic Service Deletion (DSD) messages. When a Service Flow (either provisioned or dynamically created) is deleted, all resources associated with it are released, including classifiers, PHS Rules, and SID Clusters. If a Primary Service Flow of a CM is deleted, that CM is de-reg... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.2.4.1 CM Initiated Dynamic Service Deletion | A CM wishing to delete an upstream and/or a downstream Service Flow generates a delete request to the CMTS using a Dynamic Service Deletion-Request message (DSD-REQ). The CMTS removes the Service Flow(s) and generates a response using a Dynamic Service Deletion-Response message (DSD-RSP). Only one upstream and/or one d... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.2.4.2 CMTS Initiated Dynamic Service Deletion | A CMTS wishing to delete an upstream and/or a downstream dynamic Service Flow generates a delete request to the associated CM using a Dynamic Service Deletion-Request message (DSD-REQ). The CM removes the Service Flow(s) and generates a response using a Dynamic Service Deletion-Response message (DSD-RSP). Only one upst... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.2.4.3 Dynamic Service Deletion State Transition Diagrams | Figure 11.34: DSD-Locally Initiated Transaction Begin State Flow Diagram ETSI ETSI TS 103 311-3 V1.1.1 (2017-02) 454 Figure 11.35: DSD-Locally Initiated Transaction DSD-RSP Pending State Flow Diagram ETSI ETSI TS 103 311-3 V1.1.1 (2017-02) 455 Figure 11.36: DSD-Locally Initiated Transaction Holding Down State Flow Diag... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.3 Pre-3.0 DOCSIS Upstream Channel Changes | This clause is obsolete as UCC support is no longer needed for D31. |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.4 Dynamic Downstream and/or Upstream Channel Changes | |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.4.1 DCC General Operation | |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.4.1.0 Overview | The Dynamic Channel Change (DCC) mechanism is intended for changing the MAC Domain of a DOCSIS 3.1 CM. At any time after registration that the CMTS needs to change a DOCSIS 3.1 CM's MAC domain, the CMTS shall use the DCC-REQ message. As required in clause 6.4.20.1.3, if the CMTS sends a DCC-REQ to change the downstream... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.4.1.1 Derivation of T15 Timer | The maximum value noted for the T15 timer denotes the maximum amount of time that the CMTS should reserve resources on the new channel. This value is not to be used to represent acceptable performance. The equation below describes the method for calculating the value of T15. T15 = CmJumpTime + CmtsRxRngReq Each of the ... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.4.1.2 Initialization Technique for DCC | |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.4.1.2.0 Overview | There are many factors that drive the selection of an initialization technique when commanding a dynamic channel change. While it is desirable to provide the minimum of interruption to existing QoS services such as voice over IP or streaming video sessions, a CM will not be able to successfully execute a channel change... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.4.1.2.1 Initialization Technique Zero (0) | The use of initialization technique 0 (reinitialize the MAC), results in the longest interruption of service. The CMTS shall signal the use of this technique when QoS resources will not be reserved on the new channel(s), when the downstream channel of a DOCSIS 3.0 CM confirmed with Multiple Receive Channel Support is c... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.4.1.2.2 Initialization Technique One (1) | The use of initialization technique 1 (broadcast initial ranging) may also result in a lengthy interruption of service. However, this interruption of service is mitigated by the reservation of QoS resources on the new channel(s). The service interruption can be further reduced if the CMTS supplies downstream parameter ... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.4.1.2.3 Initialization Technique Two (2) | The use of initialization technique 2 (unicast ranging) offers the possibility of only a slight interruption of service. In order to use initialization technique 2, the CMTS shall: • Synchronize timestamps (and downstream symbol clocks for S-CDMA support) across the downstream channels involved and specify SYNC substit... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.4.1.2.4 Initialization Technique Three (3) | The use of initialization technique 3 (initial ranging or periodic ranging) offers the possibility of only a slight interruption of service. This value might be used when there is uncertainty when the CM may execute the DCC command and thus a chance that it might miss station maintenance slots. However, the CMTS shall ... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.4.1.2.5 Initialization Technique Four (4) | The use of initialization technique 4 (use the new channel without reinitialization or ranging) results in the least interruption of service. In order to use initialization technique 4, the CMTS shall: • Synchronize timestamps (and downstream symbol clocks for S-CDMA support) across the downstream channels involved and... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.4.2 DCC Exception Conditions | If a CM issues a DSA-REQ or DSC-REQ for more resources, and the CMTS needs to do a DCC to obtain those resources, the CMTS will reject the DSA or DSC command without allocating any resources to the CM. The CMTS includes a confirmation code of "reject-temporary-DCC" (see clause C.4) in the DSC-RSP message to indicate th... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.4.3 DCC State Transition Diagrams | Figure 11.39: Dynamically Changing Channels: CMTS View (Part 1) Previous CMTS Operational Channel Change Required Set DCC-REQ retry counter to 0 DCC-REQ Start T11 Start T13 Previous CMTS DCC- RSP (depart) Pending DCC-RSP (<conf code>) ERROR: Unknown DCC transaction Previous CMTS Operational DCC CMTS A New CMTS Operatio... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5 Dynamic Bonding Change (DBC) | |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.1 DBC General Operation | |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.1.0 Overview | At any time after registration, the CMTS uses the DBC command to change any combination of the following parameters in a CM: • The receive channel set • DSID(s) or DSID associated attributes • Security association(s) for encrypting downstream traffic • The transmit channel set • Service Flow Cluster Assignments The CMT... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.1.1 Changes to the Receive Channel Set | The CMTS can add channels to the Receive Channel Set, delete channels from the Receive Channel Set, change channels within the Receive Channel Set of a CM, or change the downstream OFDM profile assignment by sending the CM a new Receive Channel Configuration via a DBC-REQ (see clause C.1.5.3). If the CM receives a DBC-... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.1.2 Changes to a DSID | |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.1.2.0 Overview | Using DBC messaging, the CMTS can change attributes of a DSID. DSID attributes that can change are: • Resequencing Encodings: - Downstream Resequencing Channel List - DSID Resequencing Wait Time - Resequencing Warning Threshold - CM-STATUS Hold-Off Timer for Out-of-range Events: - Rapid Loss Detection configuration - M... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.1.2.1 Changes to Resequencing Encodings | 11.5.1.2.1.1 Changes to the Downstream Resequencing Channel List The CMTS can add channels to the Downstream Resequencing Channel List, delete channels from the Downstream Resequencing Channel List, or change channels within the Downstream Resequencing Channel List by replacing the CM's Downstream Resequencing Channel ... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.1.2.2 Changes to Multicast Encodings | The CMTS can initiate a DBC transaction to either add a multicast DSID, change attributes of an existing multicast DSID, or delete a multicast DSID. Clause 11.5.3 details the operation of the CMTS and CM during the DBC process. When no RCS or Downstream Resequencing Channel List changes are required, the CMTS implement... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.1.2.3 Changes to Rapid Loss Detection | Using DBC messaging, the CMTS can disable the Rapid Loss detection on certain Resequencing DSIDs. This is to help the CMTS in switching the service flow from one DS profile to another, as described in clause 11.5.1.2.4. In order to change the Rapid Loss Detection configuration for the DSID, the CMTS shall include a DSI... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.1.2.4 Changes to Move Service Flows Between Downstream Profiles | When switching a service flow from one profile to the other on the same downstream OFDM channel, the CMTS can use DBC messaging to disable and re-enable Rapid Loss Detection. When the traffic of a service flow is moved from one profile to another, the CMTS shall ensure that the packets are kept in sequence within the s... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.1.3 Changes to the Security Association for Encrypting Downstream Traffic | Using DBC messaging, the CMTS can add or delete Security Associations (SA) used to encrypt downstream traffic. The CMTS is not allowed send a DBC-REQ to a CM that is not in the "Authorized" State. The CMTS is allowed send a DBC-REQ with an SA that employs a cryptographic suite unsupported by the CM. If an unauthorized ... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.1.4 Changes to the Transmit Channel Set | |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.1.4.0 General | Using DBC messaging, the CMTS can add channels to the transmit channel set, delete channels from the transmit channel set, replace one channel with another, change the OFDMA profile assignment, change the Ranging SID, or change the Test SID. Multiple actions can occur within a single DBC message. Whenever the CMTS chan... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.1.4.1 Impact of TCS Changes on Periodic Ranging | When the CMTS is removing a channel from a CM's TCS, the CMTS shall continue sending station maintenance or Probe opportunities to the CM for the channel being removed until the CMTS receives the DBC-RSP from the CM. If the CMTS meets the maximum number of retries for invited ranging retries on the channel being remove... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.1.4.2 Exception Conditions for TCS Changes | When changing the TCS, error conditions may result in the CMTS never receiving the DBC-RSP. Recovering from this condition is up to CMTS vendor implementation. For example, the CMTS actions may include the following for a channel replacement or channel add: • If the CMTS has sent RNG-RSP success on all new channels for... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.1.5 Changes to the Service Flow SID Cluster Assignments | |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.1.5.0 General | Using the Service Flow SID Cluster Assignments TLV in the DBC messaging, the CMTS can assign new channels to a service flow, remove channels from a service flow, or replace one channel with another for a service flow. Multiple actions can occur within a single DBC message. Clause 11.5.3 details the operation of the CMT... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.1.5.1 Bandwidth Sufficiency | When modifying the set of channels associated with a service flow, the CMTS determines whether or not there is sufficient bandwidth to adequately support the affected service flow during the DBC operation. The definition of sufficiency is left up to CMTS vendor implementation. Consider the following examples of a Servi... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.1.6 Changes to the Energy Management Mode | The CMTS can enable or disable an Energy Management Mode via a DBC-REQ message. If the primary downstream channel of the CM is SC-QAM, the CMTS can enable and disable Energy Management 1x1 Mode via a DBC-REQ message. If the primary downstream channel of the CM is OFDM, the CMTS can enable and disable Energy Management ... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.1.7 Initialization Technique for DBC | |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.1.7.0 Selection of Initialization Technique | There are many factors that drive the selection of an initialization technique when commanding a dynamic bonding change. While it is desirable to provide the minimum of interruption to existing QoS services such as voice over IP or streaming video sessions, a CM will not be able to successfully execute a channel change... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.1.7.1 Initialization Technique One (1) | The use of initialization technique 1 (broadcast initial ranging) may result in a lengthy interruption of service. However, this interruption of service is mitigated by the reservation of QoS resources on the new channel(s). The service interruption can be further reduced if the CMTS supplies the UCD TLV in the DBC-REQ... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.1.7.2 Initialization Technique Two (2) | The use of initialization technique 2 (unicast ranging) offers the possibility of only a slight interruption of service. In order to use this technique, the CMTS shall include the UCD TLV in the DBC message if the upstream channel is changing. However, the CMTS shall not use this technique if: • The DBC-REQ message con... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.1.7.3 Initialization Technique Three (3) | The use of initialization technique 3 (broadcast or unicast ranging) offers the possibility of only a slight interruption of service. This value might be used when there is uncertainty when the CM may execute the DBC command and thus a chance that it might miss station maintenance slots. However, the CMTS shall not use... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.1.7.4 Initialization Technique Four (4) | The use of initialization technique 4 (use the new channel directly) results in the least interruption of service. In order to use this technique, the CMTS shall: • Synchronize timestamps and downstream symbol clocks across the Primary Downstream Channels involved. • Include the UCD TLV in the DBC message if the upstre... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.1.8 Fragmentation of DBC-REQ Messages | If the CMTS fragments the DBC-REQ message, it shall ensure that the fragments arrive in order at the CM, as the CM is not required to resequence out-of-order DBC-REQ message fragments. The CMTS may do so either by sending all message fragments on a single downstream or by transmitting fragments such that individual cha... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.2 Exception Conditions | The CM shall reject a message that the CM determines to be invalid or inconsistent with the CM's capabilities and service flows. A DBC-REQ is considered invalid if any of the following apply: • The message format does not match the format required for a DBC-REQ. • The DBC-REQ contains an RCC that affects the CM's prima... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.3 DBC State Transition Diagrams | |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.3.1 CMTS DBC State Transition Diagrams | The CMTS shall support the DBC operation as shown in the State Transition diagrams in figure 11.44 through figure 11.47. Figure 11.44: CMTS DBC Request (Part 1) CMTS-DBC Transaction Idle DBC-RSP (<conf code>) ERROR: Unknown DBC transaction DBC Required May start duplicating traffic on channel(s) replaced within the RCS... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.5.3.2 CM DBC State Transition Diagrams | The CM shall support the DBC operation as shown in the State Transition diagrams in figure 11.48 through figure 11.54. ETSI ETSI TS 103 311-3 V1.1.1 (2017-02) 483 Figure 11.48: CM DBC-RSP (Part 1) DBC-REQ CM Operational Is the DBC-REQ message fragmented? No DBC-RSP (incomplete) yes Are all fragments received correctly?... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.6 Autonomous Load Balancing | |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.6.0 Concept of Autonomous Load Balancing | Autonomous Load Balancing is a feature of the CMTS that controls dynamic changes to the set of downstream and upstream channels used by a CM. CM DBC-ACK Pending Stop “DBC- REQ Timeout” timer Error: DBC- ACK Not Received DBC-ACK “DBC-ACK Timeout” expires Increment DBC- RSP retry counter Parse DBC-ACK DBC- ACK Valid? Err... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.6.1 Load Balancing Groups | |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.6.1.0 Overview | A "Load Balancing Group" (LBG) is a set of upstream and downstream channels over which a CMTS performs load balancing for a set of CMs. A Load Balancing Group has the following attributes: • a set of downstream and upstream channels in the same CM Service Group (CM-SG); • a policy which governs if and when a CM or its ... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.6.1.1 General Load Balancing Groups | The CMTS shall implement a General Load Balancing group for every MD-CM-SG, containing all channels of that MD-CM-SG. The CMTS attempts to identify the General Load Balancing Group (MD-CM-SG) for a CM during the topology resolution process (see clause 10.2.3). Every CM registers into an MD-CM-SG. The DOCSIS 3.0 initial... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.6.1.2 Restricted Load Balancing Groups | Restricted Load Balancing Groups are used to accommodate a topology specific or provisioning specific restriction (such as a set of channels reserved for business customers). The CMTS can associate an upstream or downstream channel with any number of Restricted Load Balancing Groups. A CM can be configured to an identi... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.6.2 CMTS Load Balancing Operation | When load balancing is enabled for a particular CM, the CMTS adheres to the following restrictions: • If the CM is assigned to a Load Balancing Group, the CMTS shall not direct the CM or any of its service flows to move to a channel outside the Load Balancing Group to which it is assigned. • The CMTS shall move the CM ... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.6.3 Multiple Channel Load Balancing | Operating in Multiple Transmit Channel and/or Multiple Receive Channel mode provides a level of load-balancing on its own. However, in cases where the number of downstream channels or upstream channels in the MD-CM-SG exceeds the number of receive channels or transmit channels for a particular CM, the CMTS performs loa... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.6.4 Initialization Techniques during Autonomous Load Balancing | The description of a Load Balancing Group includes the initialization technique(s) that could be used when autonomously load balancing a cable modem within the group. The initialization technique definition for each Load Balancing Group is represented in the form of a bit map, with each bit representing a specific tech... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.6.5 Load Balancing Policies | Load balancing policies allow control over the behaviour of the autonomous load balancing process on a per-CM basis. A load balancing policy is described by a set of conditions (rules) that govern the autonomous load balancing process for the CM. When a load balancing policy is defined by multiple rules, all of the rul... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.6.6 Load Balancing Priorities | A Load Balancing priority is an index that defines a rank or level of importance, which is used to apply differential treatment between CMs in the CMTS's load balancing decision process. In general, a lower load balancing priority indicates a higher likelihood that a CM will be moved due to load balancing operations. T... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.6.7 Load Balancing and Multicast | In order to efficiently manage multicast traffic and balance load across a Load Balancing Group, it is reasonable to expect that the CMTS might attempt to reduce the amount of duplicated multicast traffic by consolidating all members for a specific multicast group to a single downstream channel in the Load Balancing Gr... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.6.8 Externally-Directed Load Balancing | The CMTS shall support a means (via CMTS management objects) for an operator or external entity to direct the CMTS to initiate a DCC or DBC transaction with a CM. Due to the potential conflict between this functionality and the algorithms of the CMTS's own Autonomous Load Balancing functionality, the CMTS MAY reject su... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.7 Energy Management Operations | |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.7.1 Energy Management Features | During registration the CM advertises the Energy Management features that are supported via the Modem Capabilities encoding. The CMTS confirms the Energy Management features that it supports (and are enabled by the network operator) in the Modem Capabilities Encoding returned in the Registration Response message. In ad... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.7.2 Entry and Exit for Energy Management Modes | |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.7.2.0 General | When an Energy Management Feature is enabled, the CM monitors RFI network usage and compares the usage to entry and exit thresholds defined for Energy Management. If the CM's primary downstream channel is an OFDM channel, the CM's Energy Management Mode will be DOCSIS Light Sleep Mode and the CM uses the DLS entry and ... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.7.2.1 Example Threshold Operation | Figure 11.56 illustrates an example of the Energy Management Feature operation. The figure shows a graph that illustrates the time evolution of the per-second average bitrate for traffic forwarded by a CM. Overlaid on the graph are the Entry and Exit Bitrate Thresholds along with a dashed line indicating which threshol... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.7.2.2 Exiting Energy Management 1x1 Mode | From the CMTS perspective, enabling support for Energy Management is performed at the MAC Domain level. At some point in time, it may be desired to disable this CMTS support for Energy Management 1x1 mode. There may be many reasons to justify disabling this support, some of which are: • To enable detailed monitoring of... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.7.3 Energy Management 1x1 Feature | |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.7.3.0 Overview | DOCSIS CMs and CMTSs support an Energy Management Feature referred to as "Energy Management 1x1 Mode" in which the CM is instructed by the CMTS (via the Dynamic Bonding Change message) to switch to a Transmit Channel Set containing a single upstream channel and a Receive Channel Set containing a single downstream chann... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.7.3.1 Bonded Multicast and Energy Management 1x1 Mode | Bonded multicast flows require the CM to be tuned to multiple downstream channels, and so conflict with entry into Energy Management 1x1 Mode. As a result, the operator is expected to configure low data rate multicast flows as non- bonded if possible in order to prevent CMs from being kept in multi-channel operation. I... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.7.4 DOCSIS Light Sleep (DLS) Feature | |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.7.4.0 Overview | DOCSIS 3.1 CMs and CMTSs support an Energy Management Feature referred to as "DOCSIS Light Sleep Mode" in which the CM is instructed by the CMTS (via the Dynamic Bonding Change message) to change the Receive Channel Set to a single downstream OFDM channel. This mode is applicable to CMs whose primary downstream channel... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.7.4.1 Wake Substate | When the CM receives the DBC with TLV75 instructing the CM to enter DLS Mode, the CM shall enter the Wake Substate. In the Wake Substate, the CM transmits and receives traffic as usual. When entering the Wake Substate, the CM shall look at the PLC for an EMM with a valid sleep time. While awaiting the EMM, the CM conti... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.7.4.2 PLC Rx Substate | The CM enters the PLC Rx Substate from either the Wake Substate or the PLC Sleep Substate as shown in figure 11.60. While in the PLC Rx Substate, the CM disables the OFDM receiver. The CM does not process downstream traffic but continues to enqueue traffic for upstream transmission. The upstream traffic is enqueued but... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.7.4.3 PLC Sleep Substate | The CM enters the PLC Sleep Substate from either the Wake Substate or the PLC Rx Substate. While in the PLC Sleep Substate, the CM disables the OFDM receiver. In the PLC Sleep Substate, the CM MAY disable the PLC receiver. The CM does not process downstream traffic (data path receiver disabled) but continues to enqueue... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.7.4.4 CMTS Requirements for DLS Mode | The CMTS shall transmit unicast MMMs, or MAP messages with unicast ranging opportunities or with probing opportunities to a CM in DLS mode at such time when the CM is capable of receiving these messages. The CMTS can transmit unicast MMMs during the active part of CM's DLS duty cycle. Alternatively, the CMTS can issue ... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.7.4.5 Multicast, Broadcast, and DLS Mode | Particular handling considerations are needed for delivery of multicast and broadcast packets, which may be received by both CMs that are in the DLS mode and CMs in normal mode. The present document defines two methods for multicast and broadcast delivery: (a) delayed selected multicast (DSM) method, (b) selectively re... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.7.5 Interaction between Battery Backup and DLS | Devices that support Battery Backup operation, e.g. certain EMTAs and EDVAs, are generally expected to minimize their energy consumption while operating on battery. If such a device loses power and goes into battery backup mode, the CM sends a CM-STATUS message to the CMTS indicating the CM is on Battery Backup (see cl... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 11.8 Downstream Profile Descriptor Changes | Whenever the CMTS is to change profile parameters specified in the Downstream Profile Descriptor (DPD) message, it needs to provide for an orderly transition from the old values to the new values by all CMs. The CMTS needs to ensure that each CM to which this profile is assigned is either capable of receiving the new p... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 12 Supporting Future New Cable Modem Capabilities | |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 12.1 Downloading Cable Modem Operating Software | A CMTS SHOULD be capable of being remotely reprogrammed in the field via a software download over the network. The cable modem shall be capable of being remotely reprogrammed in the field via a software download over the network. This software download capability shall allow the functionality of the cable modem to be c... |
977e8a176c53922fd5283270c744fd61 | 103 311-3 | 12.2 Future Capabilities | If the CM indicates support for one or more CM capabilities defined in a higher-numbered version of DOCSIS, it shall implement them in a manner that complies with the specification in which the feature is defined. ETSI ETSI TS 103 311-3 V1.1.1 (2017-02) 510 Annex A (normative): Well-known Addresses A.1 Addresses A.1.1 ... |
6bff1d8e6adfce5063e1e51e244276b5 | 103 311-2 | 1 Scope | The present document is part of a series of specifications that defines the fourth generation of high-speed data-over-cable systems, commonly referred to as the DOCSIS 3.1 specifications. The present document was developed for the benefit of the cable industry, and includes contributions by operators and vendors from N... |
6bff1d8e6adfce5063e1e51e244276b5 | 103 311-2 | 2 References | |
6bff1d8e6adfce5063e1e51e244276b5 | 103 311-2 | 2.1 Normative references | References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendments) applies. Referenced documents which a... |
6bff1d8e6adfce5063e1e51e244276b5 | 103 311-2 | 2.2 Informative references | References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendments) applies. NOTE: While any hyperlinks i... |
6bff1d8e6adfce5063e1e51e244276b5 | 103 311-2 | 3 Definitions, symbols and abbreviations |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.