ZyXEL Communications PLA-470 V2 - V3.0.5 Guía de instalación descargar pdf (Pagina 273)

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Each phase (each cable), with three different injectors connected to the cable

TV PLC device via a “one-to-three” TV signal splitter. The induction takes

place from the three phases to the neutral cable.

254 PLC for Businesses

Table 11.3 Main HomePlug AV QoS QMP

QMP PARAMETER DESCRIPTION

Delay bound

Maximum time measured in microseconds to convey an MSDU between the

moment when it is delivered to the SAP (service access point) convergence

sub-layer at the sending station data link layer level and the moment when it

is received at the receiver station SAP layer level.

Jitter bound

Maximum shift measured in microseconds concerning the propagation delay

of an MSDU between the SAP layer of the sender and the SAP layer of the

receiver.

Nominal MSDU

Nominal value of the data part of the MSDU frame in bytes based on the

IEEE 802.3 standard (between 46 bytes and 1,500 bytes).

Max MSDU Maximum value of the data part of the MSDU frame.

Min MSDU Minimum value of the data part of the MSDU frame.

Average data rate

Average transmission speed measured in 10-Kbit/s units specified at the SAP

convergence sub-layer level to convey MSDU frames over a PLC link. This

does not include MAC and PHY headers that are necessary to convey MSDU

frames.

Max data rate

Maximum transmission speed specified at the SAP convergence sub-layer

level to convey MSDU frames over a PLC link.

Min data rate

Minimum transmission speed specified at the SAP convergence sub-layer level

to convey MSDU frames over a PLC link.

Max burst size

Maximum size, expressed in bytes, of an overrun during the continuous send-

ing of MSDU frames generated by an application at the maximum transmis-

sion speed.

MSDU error rate

Error rate for an MSDU frame, expressed as x × 10

–y

, where x is specified in

the 8 most significant bits in the unsigned integer format, and y in the 8 least

significant bits in the same format.

Inactivity interval

Maximum time, measured in milliseconds, during which a connection may be

maintained in the inactive status (no conveyance of useful data) before the

CM (Connection Manager) device authorizes the transmission again.

CLST (convergence layer

SAP type)

Compatibility of the SAP convergence sub-layer with other layers than that

specified in the IEEE 802.3 standard.

CDESC (connection

descriptor)

Optional fields from the upper application layers, or HLE (high layers enti-

ties), used, for example, for the QoS in the UPnP (universal plug-and-play)

mode, or other upper application layers. These fields are the following: IP

version (v4 or v6), source IP, destination IP, source port IP, destination port

IP, IP protocol (UDP or TCP).

ATS tolerance

Tolerated variance, measured in microseconds, on the ATS (arrival time

stamp) time stamping deviation between the PLC network synchronization

clock or NTS (Network Time Base), and the marking of MSDU frames with

the ATS time stamping.

Average number of PBs

(PHY blocks) per TXOP

(time allowed between two

transmisson opportunities)

Average number of PHY data blocks (at the physical layer level) in 520-byte

blocks per interval between two transmission opportunities to convey an

MSDU frame over a PLC link.

Minimum number of PBs

per TXOP

Minimum number of PHY data blocks (in 520-byte blocks) necessary to con-

vey an MSDU frame over a PLC link.

Maximum number of PBs

per TXOP

Maximum number of PHY data blocks (in 520-byte blocks) necessary to con

vey an MSDU frame over a PLC link.

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ZyXEL Communications PLA-470 V2 - V3.0.5 Guía de instalación Pagina 273

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