Peer Network In Iptv Network Transmission Application-iptv, Internet, Broadband - Hc Network

I, on the other network technology

I, on the other network technology

1. On the other network profile

Peer network (peer-to-peernetwork), often called P2P or peer to peer, the rise in recent years a new type of network technology. It broke in the transmission of traditional network client / server (C / S) model is formulated, the establishment of a client on the client's direct Communicate Mechanisms, such communication networks for the future development of the idea. In such networks, each node both as a client, but also act as another server, in a sense, each node are in the same position. Peer network is the success of the concept of distributed development, it will burden the traditional manner of servers assigned to each node on the network, each node would have a limited storage and computing tasks to the more nodes in the network more resources to contribute node the more, the higher the quality of its services.

Contrast, the network is still dominated by the C / S service model, although in recent years, the end user's network bandwidth has increased annually, but users still have great feelings change, mainly because the major server is overwhelmed significant increase in the number of users, the server and even the danger of collapse, at a time when idle link bandwidth is being wasted. The P2P mode network service, just to fully tap the network of free resources, no additional input, we can service more users. Therefore we can see the advantages of peer network technology is self-evident, it will in future network applications, creating significant value.

2. On the basic structure of such networks

Peer networks are generally different according to the organizational structure divided into three types.

(1) centralized peer networks Centralized peer network is not really full sense of the peer network, a range of C / S model and based on P2P networks such as ideas on ways to expand the traditional networks. Centralized peer networks based on the central directory server, the program for the network to provide directory inquiry services, delivering content through a central server no longer. This network structure is relatively simple, greatly reduced the burden on the central server. However, there is still the central node, and easy to form a transmission bottleneck, scalability is also relatively poor, not suitable for large networks. However, centralized directory for small networks of management and control could offer a choice program.

(2) unstructured distributed network Distributed network with no centralized structure of the most significant difference is that it is no central server, all nodes with communication between adjacent nodes, access to the entire network. Without the structure of the network, the nodes using a query mechanism to search for the package the resources needed. Specific manner, a node will contain the query query packet is sent to adjacent nodes, the query packet approach to the spread of the spread in the network, because that way if not restrained, will cause message flooding, so General will set an appropriate survival time (TTL), the process of decline in the query, when the TTL value is 0, will not continue to send.

This unstructured way, organization is a loose nodes join and leave the more liberal, when the query popular content, it is easy to find, but if the demand for more popular content, the smaller the TTL is not easy to find , while the larger TTL value may easily lead to a greater flow of inquiries, especially when the network extended to a certain size, even if limited TTL value is small, still give rise to the rapid increase in traffic. However, there are some rich network resource when the so-called class of server nodes, can significantly increase the efficiency of query.

(3) the structure of distributed network

Structured distributed networks, distributed hash table based on the past few years

by: gaga

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