DSL Rings (DSLR) is a
telecommunications
Telecommunication is the transmission of information by various types of technologies over wire, radio, optical, or other electromagnetic systems. It has its origin in the desire of humans for communication over a distance greater than that fe ...
technology developed by Canadian start-up Genesis Technical Systems, based in
Calgary, Canada. The
DSL
Digital subscriber line (DSL; originally digital subscriber loop) is a family of technologies that are used to transmit digital data over telephone lines. In telecommunications marketing, the term DSL is widely understood to mean asymmetric dig ...
technology re-uses existing copper telephone network cabling to provide bandwidth of up to 400 Mbit/s.
[ Note: Genesis has posted corrections and clarifications to the Financial Post article here: http://www.dslrings.co.uk/the-national-post-a-smarter-route-to-high-speed-net/] The technology also includes
quality of service
Quality of service (QoS) is the description or measurement of the overall performance of a service, such as a telephony or computer network, or a cloud computing service, particularly the performance seen by the users of the network. To quantitat ...
(QoS) and efficient
multicast
In computer networking, multicast is group communication where data transmission is addressed to a group of destination computers simultaneously. Multicast can be one-to-many or many-to-many distribution. Multicast should not be confused with ...
.
Genesis reported that two unnamed European
telecom providers began testing the technology in July 2010.
Technical overview
DSL Rings technology combines the capabilities of
VDSL2
Very high-speed digital subscriber line (VDSL) and very high-speed digital subscriber line 2 (VDSL2) are digital subscriber line (DSL) technologies providing data transmission faster than the earlier standards of asymmetric digital subscriber li ...
,
DSL bonding,
Resilient Packet Ring
Resilient Packet Ring (RPR), as defined by IEEE standard 802.17, is a protocol designed for the transport of data traffic over optical fiber ring networks. The standard began development in November 2000 and has undergone several amendments since ...
s (RPR) technologies and
add-drop multiplexer
An add-drop multiplexer (ADM) is an important element of an optical fiber network. A multiplexer combines, or multiplexes, several lower-bandwidth streams of data into a single beam of light. An ''add-drop'' multiplexer also has the capabili ...
s (ADM) in a
collector ring instead of the historic tree and branch approach.
Note that the links between the houses are implemented via passive jumper wires that do not come back to the Convergence Node (CN). In this way, a single CN design can efficiently manage 2-16 houses in a given ring. Genesis suggests a maximum of 16 houses in the ring due to the delay introduced by transiting each node to get back to the
central office (CO); however RPR has an upper limit of 255 nodes in a ring.
Bonded pairs are used to obtain maximum bandwidth from the CO to the pedestal (DP). The Convergence Node, which is environmentally hardened and powered via the copper wire from the CO, terminates the bonded signals and acts as the gateway node for the subscriber 'collector' ring.
DSL Rings technology is based on the
Resilient Packet Ring
Resilient Packet Ring (RPR), as defined by IEEE standard 802.17, is a protocol designed for the transport of data traffic over optical fiber ring networks. The standard began development in November 2000 and has undergone several amendments since ...
s (RPR) protocol. The technology enables a fail-safe in that, if a single pair is cut, the traffic goes in the opposite direction around the ring to get to the network gateway node. RPR also provides built in
quality of service
Quality of service (QoS) is the description or measurement of the overall performance of a service, such as a telephony or computer network, or a cloud computing service, particularly the performance seen by the users of the network. To quantitat ...
(QoS) for traffic differentiation and managed services as well as an Efficient Multicast (EM) capability that significantly reduces overall ring bandwidth requirements for multicast/broadcast video.
Within the DSL Rings architecture the bonded link to the CO/Exchange, which is typically a binder group (20 – 25 pairs depending on the telco), is terminated at the pedestal where a ring is initiated. DSL Rings provides the capability to both terminate the bonded link from the CO and initiate another bonded link towards another pedestal down the road.
References
External links
Genesis Technical Systems Corp.G.Bond
{{DSL technologies
Digital subscriber line