HomePNA 2.0 was developed to run over existing phone line and coaxial wiring in a symmetrical mode at a peak data rate up to 32Mbps, with throughputs approaching 20Mbps. The HPNA 2.0 network uses a shared physical media (wiring) has no need for a switch or hub, unlike Ethernet that requires dedicated (homerun) UTP CAT 3 or 5 cable.
HPNA 2.0 will serve geographical coverage area of up to 10,000 sq ft or point to point distance no greater than 1,000 feet, (300 meters). HPNA 2.0 places no restructions on wiring type, wiring topology or termination. The system is designed to operate with a network point to point loss of no more than 28dB.
HPNA 2.0 uses the same bandwidth HPNA 1.0 but combines quadrature amplitude modulation (QAM) 10Mbps data rate uses Ethernet-like carrier sensing multiple access with collision detection (CSMA/CD) for media access control (MAC) behavior. The HPNA 2.0 QoS (Quality of Service) provisions, its MAC layer introduces eight priority levels and improves collision resolution.
HPNA 2.0 average throughput of 10Mbps is more than adequate for most applications, but burst loads presented by TCP transfers and dowloads, can at times, make the network unable to provide necessary band width and latency guarantees necessary without some QoS mechanics.
Latency in voice connections MUST BE CONTROLLED below 10 to 20ms on the home network segment if acceptable voice qualitiy is to be maintained. Streaming video and audio connections must be guaranteed bandwidth as demanded by the applications determined from the network.
Furthermore, bandwidth allocations within a given class of service should be fair. The HPNA 2.0 network's support of eight priority levels of QoS from zero to seven (highest). A time-division scheme is used to enable prioritized access. For every priority level, a designated time slot is established. Devices are allowed to start the transmission of a packet only in (or after) the time slot that corresponds to the packet's priority as determined by the device.
HOMEPNA 2.0 Q of S PROVISIONS
The initial motivation for home networking was to share resources among multiple PCs such as Internet access, files and device sharing. Applications that now will command the home network will include; transport of digital audio, digital voice (IP telephone), digital video (IP television) and telemetry (medical and home security). With these home networking applications of today and the future driving CoS (Class of Service) provisions HomePNA 2.0 has adapted.
PNAN 1.0 & HPNA 2.0 was introduced well before before the broadband era. The orginal intent was file sharing and networking of peripherals, this application was shortly dominated by wireless technologies adopted by consumers and commerical users. In 1999 many tech publications were writting of the demise of HomePNA. Actually, the earliest manufacture of HomePNA chipsets stepped away into WiFi wireless, leaving HomePNA technology to die.
In early 2000, it was discovered that HPNA was well adapted for use within coaxial cable AND at the same time twisted pair media. The author of this natative developed the HCNA balun that allowed the application of HomePNA to HomeCNA.
The Chart below provides the generations of HomePNA from 1998 to the technology of today. please note the slight increase in frequency spectrum utilzed vs. the increase in data throughput.