Measurement technology and measured indexes
Data collection devices
Broadband equipment serves as a means of performance indexes (KPI) control:
- network terminations ADSL (DSLAM);
- network terminations FTTx/PON;
- network edge switch routers metro-Ethernet;
- WLL equipment.
In case of impossibility to control specific quality indexes from equipment within the system, it is allowed to use hardware probes and additional agents in equipment.
Data storage and processing devices
DSLmaster processes a large volume of measured data. Due to this reason collection, storage and processing of data is carried out in the form of distributed server system, including servers of intermediate storage and processing (collector-servers) and one or several central servers.
Number and location of servers of information collection and processing system are defined based on scales of the system implementation project.
Measured indexes
The system provides for selective measuring of key performance indexes (KPI) depending on installed program modules and implemented functions. Maximum configuration of the DSLmaster system ensures collection and processing of all key performance indexes, which are available on equipment, installed hardware probes or agents.
The table contains the full list of KPI, available to the system from DSLAM ADSL equipment.
| Name | Description and comments |
| Port ID | DSLAM port number |
| STATE-CUR | Line state |
| Mode | Operation mode of ADSL/ADSL2/ADSL2+/ReADSL |
| Pth | Frame loading mode FAST/INTERLEAVE |
| Dn | Current speed down the line (Kbit/sec) |
| Up | Current speed up the line (Kbit/sec) |
| Max-Dn | Maximum speed down the line (Kbit/sec) |
| Max-Up | Maximum speed up the line (Kbit/sec) |
| NM-Dn | Noise level margin down the line (dB) |
| NM-Up | Noise level margin up the line (dB) |
| ATN-Dn | Signal attenuation level in the working band down the line (dB) |
| ATN-Up | Signal attenuation level in the working band up the line (dB) |
| POWER-Dn | Initial power down the line |
| POWER-Up | Initial power up the line |
| BTA Bits на тоне | Table Bit-Tone-Allocation – table of 512 tones with an index |
| CRC | (Cyclic Redundancy Check) – checksum error down and up the line |
| FEC | (Forward error correction) – redundant FEC code error up and down the line |
| ES | (Error Seconds) – error seconds |
| SES | (Severally Error Seconds) – seconds which are severely error |
| UAS | (Unavailable Seconds) – channel unavailability seconds |
| BlkES | (Block Error Seconds) – block error seconds |
| LOSS | (Loss of Signal Seconds) – loss of signal seconds |
| # of Sync | Number of synchronization attempts |
| iesProblemCause | Cause of the problem |
| adslAtucPerfLoss | ATU-C performance loss |
| adslAturPerfLoss | ATU-R performance loss |
| L | Cable length estimation |
| Type | Subscriber pair type |
Volume and list of KPI of specific projects depend on realized functionality of the system, as well as on types of BBA equipment and the level of openness of their software management interfaces. The process of system structure coordination includes coordination of the KPI list and index polling period.
Partitioning of indexes and creation of quality indexes
In the system there are widely used key quality indexes (KQI), which represent transformed performance indexes. KQI use allows to optimize work of analytics and operators, who use the system, so the system can be used by mid-level specialists without additional technical skills.
KQI represents the new generation of service quality indexes. Generation of KQI is determined by configurable (depending on the DSLmaster system functional) KPI partitioning algorithm. Partitioning algorithm of each KQI can be configured in accordance with peculiarities of realization of this or that system function.
