3G IP bearer network solution
Abstract The 3GIP bearer network in the availability, reliability, manageability, and evolutionary aspects of the construction of such ideas, introduced the Alcatel Shanghai Bell 3GIP carrying network programs.
Order to meet the mobile business from a circuit-based voice over a single business to business change, mobile network infrastructure has evolved from 2G, 2.5G to 3G networks evolve, and the maturity of IP Technology, made the technical from the business bearing TDM mode to be turned into full-IP approach possible. IP bearer network is the trend, then, how reasonable were the bearer network deployment, to meet the user's multi-service experience while meeting cost-effective network evolution?
1,3 G's business features
Major domestic carriers have varying degrees of completion metropolitan area network. But MAN is mainly based on the traditional switching and routing technologies to provide simple data services, while the wide variety of 3G services, requirements, this bearer network capacity on new challenges. The following is the main business of 3G network quality requirements:
Voice type: the bandwidth is usually less demanding, but as a mobile network based services, telephony, QoS requirements of the most stringent.
Video categories: QoS needs of slightly less than the voice service, but needs more bandwidth, and with the 3G user number and user visible classes on business demand, operators need to consider how to protect the video business smooth and high quality pictures.
Data types: type of business, low QoS requirements, but more categories of different types of data services, bandwidth, reliability needs are very different, to provide more differentiated services Operators should consider how to distinguish between these businesses.
2,3 G IP bearer network needs and its building
To meet the voice, data services, video services and signaling business bearing demand, 3GIP bearer network construction should have the availability, reliability, manageability, and may be evolutionary.
2.1 Availability On the 3G's IP bearer network, the network architecture should be the reasonable for the 3G core network to provide signaling and data transmission channel.
3G launch in the early stage of network element nodes and the limited operations, IP Bearer Network access node only by a small metro access routers can form through POSSTM-1, POSSTM-16 or the GE relay links are the backbone of regional nodes access to their units for more than 2 backbone routers, and then realize the IP backbone access; all nodes access the router interface through GE and FE access 3G services.
7750SR7 Alcatel Shanghai Bell is the high-performance core routers, ideal for the 3G network as the bearer network of Metro access router. As a network provider edge router (PE) role, 7750SR in the QoS, reliability and network management has a unique advantage.
In 7750SR, the signaling will be a separate division of a virtual private network (VPN), the same time, packet-switched (PS) domain, were set a variety of data services, VPN, VPN according to the different transmission set more Label Switching (MPLS) frame EXP bits, and configure the whole network of differentiated services (DiffServ) strategy.
Proposal in accordance with Table 1 for DiffServ settings.
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