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Bier multicast technology white paper From ZTE

The following is the Bier multicast technology white paper From ZTE recommended by And this article belongs to the classification: telecommunication industry , research report.

Recently, ZTE released the white paper on bier multicast technology. BIER(Bit Index Explicit Replication (bit index explicit replication) is a new type of multicast technology. In the 5g era, with the rapid growth trend of high traffic business demand, this white paper analyzes the advantages and value of bier multicast technology from the technical field for the first time. With the large-scale deployment of 5g, the scale deployment of bier multicast technology will build a new network operation mode for operators and bring new growth points of business value.

In 5g era, large bandwidth services such as network live broadcasting, multi-party conference and IPTV live broadcasting are growing rapidly. In addition to IPTV live broadcasting, most of the services adopt unicast technology. With the rapid growth of the number of users, the network will face great bandwidth pressure and challenges. Therefore, the promotion of multicast technology has become the general trend. Compared with the traditional multicast technology, bier multicast technology has the advantages of simple deployment, stable network state and high service scalability. It can support the IP network of operators and provide users with flexible and controllable multicast services. It will become an important cornerstone of the IP network architecture of operators in the future.

First of all, when the traditional PIM (Protocol Independent Multicast) multicast technology is used for large-scale multicast service deployment, each router in the network needs to maintain hundreds to thousands of multicast forwarding status information, so the workload is huge. Bier multicast provides a stateless multicast forwarding mechanism, which preserves the multicast status information at the in and out nodes of the multicast traffic. The intermediate node does not perceive the multicast traffic, does not establish a multicast forwarding tree, and does not maintain the multicast forwarding status information. Its stateless feature can greatly reduce the pressure of multicast services on the network.

Secondly, in the large-scale VPN multicast deployment, if the traditional multicast technology is used, assuming that there are n VPN customers and each customer has n multicast services, the core layer device of the operator needs to maintain N2 multicast flow state information, and when the network topology or multicast source and multicast receiver change, each core layer device also needs to recalculate each VPN The multicast publishing tree of each multicast. Using bier multicast technology, network core layer devices no longer need to maintain the forwarding status of each VPN and each multicast. It can greatly reduce the resource occupancy rate of core layer devices of operators, and greatly improve the convergence rate of VPN multicast routing, so as to ensure the VPN service experience of end users.

In addition, the traditional multicast technology needs to deploy the RSVP, LDP and other complex protocols that will no longer be used in the future network, which can not adapt to the trend of network development. Bier multicast technology has no coupling relationship between the upper layer multicast application and the lower layer routing environment, so it can flexibly adapt to a variety of routing environments, and also can flexibly adapt to a variety of upper layer multicast applications. The existing network can smoothly evolve to bier only by adding bier capability expansion in control plane protocol of routing layer, bier tunnel capability expansion in control plane protocol of multicast overlay layer, and bier encapsulation / unsealing and bier forwarding capability in data plane. From this point of view, bier multicast technology can well meet the future trend of network simplification.

ZTE has been able to provide the support of router, network controller and app in bier multicast technology, and has the ability of end-to-end service. In the follow-up, ZTE will actively cooperate with operators to discuss Bier’s current network deployment and business carrying scheme, and participate in the formulation of laboratory verification, current network pilot, equipment specification formulation and current network formal deployment plan, so as to steadily promote the commercialization process of bier.

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