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The data over cable service interface specification (DOCSIS) specifies the protocol for exchanging bidirectional transfer of Internet protocol (IP) traffic, between the cable system headend and customer locations.When a cable company offers Internet access over the cable, Internet information can use the same cables. Putting both upstream and downstream data on the cable television system requires two types of equipment: a
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The CMTS takes the traffic coming in from a group of customers on a single channel and routes it to an Internet service provider (ISP) for connection to the Internet. At the head-end, the cable providers will have, or lease space for a third-party ISP to have, servers for accounting and logging, Dynamic Host Configuration Protocol (DHCP) for assigning and administering the IP addresses of all the cable system's users, and control servers.
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Data Model Management Layer
CM Agent HAL Integration (backend) Layer, a.k.a, component-specific HAL
CMAgent object in its DML layer:
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Device.X_RDKCENTRAL-COM_CableModem. |
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Retrieving cable modem values using dmcli
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$ dmcli eRT getv Device.X_RDKCENTRAL-COM_CableModem. CR component name is: eRT.com.cisco.spvtg.ccsp.CR subsystem_prefix eRT. getv from/to component(eRT.com.cisco.spvtg.ccsp.cm): Device.X_RDKCENTRAL-COM_CableModem. Execution succeed. Parameter 1 name: Device.X_RDKCENTRAL-COM_CableModem.DsOfdmChanNumberOfEntries type: uint, value: 0 Parameter 2 name: Device.X_RDKCENTRAL-COM_CableModem.UsOfdmaChanNumberOfEntries type: uint, value: 0 Parameter 3 name: Device.X_RDKCENTRAL-COM_CableModem.StatusOfdmaNumberOfEntries type: uint, value: 0 |
This hardware abstraction layer (HAL) concept is used for every interface.
The CM HAL provides a well-defined software interface that cable modem software developers can use to interface to RDK-B.
cm_hal.c provides h provides function call prototypes and structure definitions used for the RDK-Broadband CM HAL.
Some example APIs APIs are listed below:
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APIs |
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cm_hal_InitDB |
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docsis_InitDS |
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docsis_InitUS |
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docsis_getCMStatus |
docsis_GetDSChannel |
docsis_GetUsStatus |
docsis_GetUSChannel |
docsis_GetDOCSISInfo |
docsis_GetNumOfActiveTxChannels |
docsis_GetNumOfActiveRxChannels |
docsis_GetErrorCodewords |
docsis_GetMddIpModeOverride |
docsis_SetMddIpModeOverride |
docsis_GetUSChannelId |
docsis_GetDownFreq |
docsis_SetStartFreq |
docsis_GetDocsisEventLogItems |
docsis_ClearDocsisEventLog |
cm_hal_GetDHCPInfo |
cm_hal_GetIPv6DHCPInfo |
cm_hal_GetCPEList |
cm_hal_GetMarket |
cm_hal_Set_HTTP_Download_Url |
cm_hal_Get_HTTP_Download_Url |
cm_hal_Set_HTTP_Download_Interface |
cm_hal_Get_HTTP_Download_Interface |
cm_hal_HTTP_Download |
cm_hal_Get_HTTP_Download_Status |
cm_hal_Reboot_Ready |
cm_hal_HTTP_Download_Reboot_Now |
cm_hal_FWupdateAndFactoryReset |
cm_hal_ReinitMac |
docsis_GetProvIpType |
docsis_GetCert |
docsis_GetCertStatus |
cm_hal_Get_CableModemResetCount |
cm_hal_Get_LocalResetCount |
cm_hal_Get_DocsisResetCount |
cm_hal_Get_ErouterResetCount |
cm_hal_HTTP_LED_Flash |
docsis_GetDsOfdmChanTable |
docsis_GetUsOfdmaChanTable |