The network structure of the commonly used IP telephone communication network includes mesh network, star network and composite network.
1. IP phone mesh network. There is a direct link connected between any two nodes in the IP telephone network. The feature of the IP telephone mesh network is that there is a high-speed, stable direct link between nodes, once it meets the requirements of a large amount of information transmission between nodes. When the direct link between nodes fails, only a certain adjacent node can form a circuitous link, which greatly improves the reliability of information transmission between nodes. However, with the increase in the number of nodes in the network, the number of direct links will increase exponentially in IP telephones. For example, if there are N nodes in the network, there will be 1/2 [N(N-1)] transmission links, so the cost of network construction is high. Therefore, the mesh network structure of IP telephones is suitable for transmitting traffic The construction of a larger backbone transmission network with fewer network nodes, such as the communication network between major exchanges.
2. IP phone star network. There is a central node in the network, and other nodes are connected to the central node to form a radial shape, so it is also called a radial network. In the IP telephone star network, the transmission of information between each node must be achieved through the central node. The characteristic of this kind of network structure is that the links in the network make the number of links in the network smaller. If there are N nodes in the network, (N-1) transmission links are required, and the network construction investment is small. However, if the central node in the network fails, all nodes cannot communicate, causing the entire network to be paralyzed and the network reliability is low. In addition, because there is no direct link between the IP phone nodes, the information transmission is completed by the central node, and it is impossible to achieve a large amount of information transmission between the nodes. Therefore, the star-shaped network is suitable for the construction of a local, small-scale, and low-information communication network. For example, in areas where rural credit communication is relatively dispersed, central nodes are built in the county, and all the nodes established by the county’s towns are connected to the county. The central node forms a star-shaped network.
3. IP telephone complex network. In actual use, combining the respective characteristics of the mesh network and the star network, the communication network is constructed using a conformable network structure. For the construction of the IP telephone complex network, the shape structure is usually adopted in the area with small local information transmission volume, and the mesh network structure is adopted in the main transmission part.
1. IP phone mesh network. There is a direct link connected between any two nodes in the IP telephone network. The feature of the IP telephone mesh network is that there is a high-speed, stable direct link between nodes, once it meets the requirements of a large amount of information transmission between nodes. When the direct link between nodes fails, only a certain adjacent node can form a circuitous link, which greatly improves the reliability of information transmission between nodes. However, with the increase in the number of nodes in the network, the number of direct links will increase exponentially in IP telephones. For example, if there are N nodes in the network, there will be 1/2 [N(N-1)] transmission links, so the cost of network construction is high. Therefore, the mesh network structure of IP telephones is suitable for transmitting traffic The construction of a larger backbone transmission network with fewer network nodes, such as the communication network between major exchanges.
2. IP phone star network. There is a central node in the network, and other nodes are connected to the central node to form a radial shape, so it is also called a radial network. In the IP telephone star network, the transmission of information between each node must be achieved through the central node. The characteristic of this kind of network structure is that the links in the network make the number of links in the network smaller. If there are N nodes in the network, (N-1) transmission links are required, and the network construction investment is small. However, if the central node in the network fails, all nodes cannot communicate, causing the entire network to be paralyzed and the network reliability is low. In addition, because there is no direct link between the IP phone nodes, the information transmission is completed by the central node, and it is impossible to achieve a large amount of information transmission between the nodes. Therefore, the star-shaped network is suitable for the construction of a local, small-scale, and low-information communication network. For example, in areas where rural credit communication is relatively dispersed, central nodes are built in the county, and all the nodes established by the county’s towns are connected to the county. The central node forms a star-shaped network.
3. IP telephone complex network. In actual use, combining the respective characteristics of the mesh network and the star network, the communication network is constructed using a conformable network structure. For the construction of the IP telephone complex network, the shape structure is usually adopted in the area with small local information transmission volume, and the mesh network structure is adopted in the main transmission part.