Network Monitoring For Satellite Teleconference, Distance Learning, and Media Distribution

Today’s Satellite Systems

Many satellite system projects these days involve satellite uplinks with hundreds or perhaps thousands of receivers in the network receiving content from them. Traditionally, if these networks are monitored, the planners rely on SNMP traps for big troubles and plan for round-robin polling and pinging to determine the health of the receivers and other devices.

Traditional monitoring systems, because of polling speed, within an hour or two NOC (network operations center) personnel can know system status for all devices.  For example:

  • is device alive
  • can I ping it
  • is the receiver on the right channel
  • signal level
  • locked for the transmission
  • error rates

As to the traps, a little secret: many of the devices do not support traps and if they do traps can be lost because they are sent as UDP traffic with no assured delivery. Requirements for today’s professional satellite systems have evolved to the point where NOC personnel need more information and they need it more quickly. Representative are teleconference, distance learning, and media distribution systems.

For these new systems the requirements for monitoring have moved out of a strictly maintenance need to both a maintenance and operational requirement.

Teleconference and distance learning have an almost interactive need for status and data:

1. Is the receiver is on the right channel?

2. Is the feed good? Are error rates low and the signal level high?

3. If the signal is low in Milwaukee, what’s the weather like?

4. Are all of the correct materials downloaded to the receiver?

5. Are keypads and other data entry devices ready?

Media distribution systems for broadcast and digital cinema have many of the same needs and some others:

1. Is there sufficient space on the device to receive the huge files used in these operations?

2. What is the progress of the transfer (it takes a long time to transfer multi-gigabyte files)?

3. Did the digital rights management (DRM) keys arrive?

4. If it is a playout device, did the correct play list arrive?

5. Can we get the playback logs as events play?

6. What about maintenance logs, do we have to SSH into each device and retrieve them manually, or will the system automatically gather and check them for us?

These lists are representative of information the NOC needs to ensure proper operation of the network. First and second generation monitoring systems don’t even begin to broach gathering and reporting the new types of information needed to reliably operate these systems.

Third Generation Network Monitoring

Satellite network monitoring systems must have parallel collection processes in order to have sufficiently fresh data to be of value to the NOC. For many types of operations media content must be tracked. You could argue that media is not part of network monitoring and yet today’s NOC needs this information to ensure proper operation. A new generation of devices are out there delivering media content. Real time, or near real time reporting is needed to insure proper operation of these systems. New ways to visualize the network to go along with these new data sets is also required.

It’s a new game in the network monitoring world: network monitoring software has to move to the next level, including being media-aware, to meet the needs of today’s NOC for information.

Find a Good Pediatric Dentistry and Keep Everyone Happy

Raising kids is a big responsibility and privilege. Even though being a parent often comes with some challenges, you can’t afford to neglect their health in any kind of way. One area where many parents don’t realize can affect their children the most is the type of health and dental providers they choose to take their kids to. If you want your children to values life, their health and be open and willing to being seen and treated when they are supposed to, you need to make sure that they have a healthy respect and relationship with their providers. This means that instead of taking them to see a regular dental professional for cleanings, checkups and treatments, you need to find a good pediatric dentistry for them to go to.

Believe it or not, childhood impressions and experiences can leave a long-lasting mark on the lives of your children. The values and beliefs that you instill in them now will play a major factor on how well they manage their lives as they get older. If you want your children to stay on top of their oral health and protect their teeth, you should take them to a pediatric dentistry practice and allow them to be treated by professionals who are specially trained to handle childhood dental issues.

Going to the dentist is a very scary and nerve racking experience for many children and adults. Many people who suffer from dental phobias, often had bad experiences when they were younger. You don’t want your children to grow up and neglect their oral health in any way. By teaching them the importance of good oral hygiene, you can provide them with a strong foundation that they can use for the rest of their lives. There are several benefits to taking your children to a pediatric dentistry, versus any other type of dental provider. First, you can alleviate their fears and anxieties by showing them that there are places that cater to children and make going to the dentist fun.

The professionals that work in this type of practice, have to receive extra training that is focused on children of all ages. These professionals learn how to recognize, treat and prevent disease when it comes to the teeth and gums of young patients. They also know how to relate to the kids so that they can develop an appreciation of the field and a better understanding of what is being done at any given moment during their appointments.

Imagine how much easier it will be for you to get your children to the dentist each time they have an appointment. You don’t have to dread these events and wind up feeling drained after it is over. You and your children can remain on good terms and avoid the struggles that most parents find themselves dealing with when it is time to have teeth and gums checked. The right pediatric dentistry will make keeping good dental hygiene a much more enjoyable experience for everyone.

Distributing the Processing and Storage Function in Distributed Systems

In distributed system, multiple computers are connected on the network working together as a system. These computer are independent but their collection appears to it users as a single coherent system. Distributed system provides sharing of resources and information. Processes executed on these systems can communicate with one another by exchanging messages over communication channel.

The distributed processing refers to LAN designed so that a single program can run simultaneously at various sites. Most distributed processing systems contain sophisticated software that detects idle CPUs on the network and parcels out programs to utilize them.

Another form of distributed processing involves distributed database, databases in which the data stored across two or more computer systems. The database system keeps track of where the data is so that the distributed nature of the database is not apparent to users.

A distributed database consists of two or more data files located at different sites on a computer network. Because the database is distributed, different users can without interfering with one another. However, the DBMS must periodically synchronize the scattered database to make sure they all have consistent data.

The software system that facilitates the the management of a DDB in such a way that the distribution aspects are transparent to users.

A DDBMS running on a different computer at each site can handle local applications autonomously and participates in at least one global application requiring data from other sites. Communication between different sites via a network is essential for any global application.

The Functions of Such DDBMS are:

To extend communication services to provide access to remote sites and allow the transfer of queries and data across the network.
To extend the DD to store data distribution details.
To provide distributed query processing, including optimization and remote data access.
To extend accuracy control to maintain consistency of replicated data.
To extend recovery services to take account of failures either of sites or of communication links.

Distributed data storage:

There are two approaches for storing data in distributed database.

Replication: The system create different similar copy of any data and each copy is stored on different places. There are two types of replication strategy.
Selective Replication
Complete Replication

Complete Replication: The complete replication strategy consists of maintaining a complete copy of the database at each site. This maximizes accessibility and reliability, but costs of storage and the communications needed for updates may be high.