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Разница в сети AON VS PON

Время: 2022-10-11 Хиты : 11

There is a technology called fiber to the home (FTTH) that uses optical fiber to connect individual buildings, including homes and apartments, to a network. Subscribers have a long way to go before they switch to FTTH from copper lines for high-speed Internet access. Active optical networks (AON) and passive optical networks (PON) are the two primary methods for implementing high-speed FTTH networks (PON).Так что же на самом деле differences between AON and PON networks?


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What is the AON Network?

Active Optical Network is abbreviated as AON. Active optical networks, usually referred to as hybrid networks, are very common. Active and passive components are both incorporated into hybrid networks. Active networks, in contrast to passive ones, are able to alter their pathways according to the volume of traffic that is being transmitted. Active networks are more difficult to understand than passive optical networks due to the fact that active networks use both active and passive components. 

During the process of signal transmission from the central office equipment to the user distribution unit, active optical networks make use of photoelectric conversion equipment, active optoelectronic devices, optical fiber, and other active optical fiber transmission equipment. This type of network is referred to as an active optical network.

There are three primary categories of optical devices used in an active optical network. Amplifiers, transponders, and modulators are all necessary components. The use of all of these technologies together makes it possible to implement more intricate communication strategies.

AON Characterstics:

  • Long Distance Transmission:  The transmission distance can be 70km or higher that that without  a repeater.

  • High Capacity Transmission: Achievable access rate can be 155MB/s or 622Mbs/s

  • Mature and Stable Technology:   PDH and SDH both devices are both widely deployed, allowing for more complicated communication methods.

 

What is a PON network?

PONs, in contrast to AONs, are point-to-multipoint networks in which passive optical splitters are employed to distribute and gather optical data. Fiber optic splitters eliminate the need to deploy several fibers between the hub and the end-users, making it possible for the PON network to serve many subscribers via a single optical fiber. In a PON network, the fiber optic cables are shared, and there is no need for electrically powered switching equipment. The only places where electricity is needed are the transmitter and receiver.

PLC splitters are the backbone of a typical PON network. A fiber splitter either receives many optical signals at its input and combines them into a single output, or it receives a single optical signal at its input and splits it into numerous outputs. These PON splitters may be used in either way. To be more specific, the central office can send the fiber signals downstream to all customers. To connect to the head office, user signals can be routed upstream and bundled into a single fiber.

 

The benefits of passive optical networks

The primary benefit of passive optical networks is how simple they are to set up. Passive optical networks don't require any supplementary equipment like active optical networks. A cable and something called a splitter are all that is required.

Active components are more expensive than passive optical networks. They don't need electricity, thus there's no need for fancy wiring. They are more reliable and less likely to break since they are static.

Passive optical networks provide greater scalability due to their adaptability. They are easily scalable beyond their initial configuration because they don't require any more power or physical space.


AON vs PON Network Difference

1. In addition to protecting the entire network from threats, PON also safeguards individual nodes. In a network with single-node protection, if one node's equipment fails, it won't affect the performance of the other nodes, and the network will be able to withstand the failure of multiple nodes at once. To ensure the safety of the network as a whole, we can employ the same double optical plane protection mechanism to offer 1+1 channel protection, 1+1 circuit protection, and automatic optical plane switching.

2. Not only should the above reseason be considered, but so are many other factors in the application. When deploying radio frequencies and providing video services, for instance, PON is a good option. If you or your users have high network requirements, AON is the way to go.

3. Individual users in ADN are provided with their own dedicated optical fiber. Everyone gets the same bandwidth. Within a PON network, users divide up the optical fiber. Since everyone on a PON is using the same bandwidth, its users may experience slow performance. Furthermore, tracing the origin of a problem in the PON system is challenging.

4. While there are only two terminals, the optical signals are primarily guided by active equipment, and no powering devices are used to guide the signals. As a result, AON has higher operational and capital expenses than PON does.

5. While PON is typically limited by fiber cable runs of up to 20 km, AON can cover distances of up to 90 km. PON users should, therefore, experience less attenuation and a more faithful reproduction of their source signals.

6. When new nodes are added to the network, the AON requires optical interface boards to be installed at tributary nodes in order to increase the optical direction, while the PON only requires the optical splitter to be swapped out. Using optical splitters with more branches improves the light's directional accuracy. As a result, PON expansion is much easier and cheaper to implement than AON.


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