3G Access Transmission Network Solution

We recommends the use of SDH-based MSTP technology as the main solution for 3G access transmission network.

SDH-based MSTP technology in addition to inheriting the traditional SDH network structure is clear, easy to manage and maintain and business self-healing ability, in addition to the selection of its bearer 3G access transmission network, but also has the following advantages: First, most of the SDH optical transmission equipment currently operating in the network have the ability to smoothly upgrade to MSTP, operators only need less investment to transition from traditional SDH to MSTP. And because the MSTP platform is compatible with SDH technology, it can form a unified basic transmission network platform with the existing SDH network. This not only protects the operator's original network investment, but also realizes the unified maintenance and management of the transmission network. Second, the MSTP platform also supports shared ring (VP-Ring) technology.

The so-called VP-Ring technology refers to allocating a fixed amount of bandwidth to multiple nodes on the ring, and the nodes on the ring can occupy the bandwidth according to the demand. For the characteristics of burstiness and unevenness of 3G transmission network, MSTP platform can greatly improve bandwidth utilization and reliability after adopting VP-Ring technology. Then, the MSTP platform can carry a very rich type of business, choose it to carry 3G access transmission network, in addition to meet the requirements of 3G service transmission, but also can simultaneously transmit 2G and data services, and can carry out large customer dedicated line services and OVPN value-added services, fully reflecting the value of the resource network.

At the same time, MSTP equipment can also support MPLS technology, providing strong support for 3G service transmission carried by IP in the future 3G transmission network. It can be said that MSTP has a perfect scalable solution for 3G wireless network oriented broadband data characteristics. In addition, MSTP equipment can also flexibly configure the corresponding TDM, ATM and IP modules according to the size of the business volume in each phase of 3G, so as to smoothly transition from small to large capacity, from multiple services to full packet services, realize the principle of network construction while investing and benefit, and reduce costs.

In short, the use of SDH-based MSTP technology to build a unified access transmission network platform to carry 3G access transmission network, while reducing the complexity of transmission equipment, but also make the transmission network and business network separation, clear interface, and can meet the 3G transmission interface gradually to the trend of IP interface development, but also has a relatively low cost, is a more complete solution.

Core transmission network solution

The construction of 3G core transmission network is recommended to adopt ASON+WDM as the main solution, which has the intelligence of IP transmission network and high bandwidth of WDM optical network, and is a more ideal solution for carrying 3G core transmission network.

First, the 3G core transmission network is becoming more and more obvious with its business development, IP-based and large granularity. This directly drives the transfer of long-distance trunk transmission network from SDH technology to IP over WDM technology. However, due to the presence of a large number of IP packets in the IP transport network, multiple routers are required to transfer between their sources and hosts, resulting in a large number of pass-through services.

For these IP pass-through services, if IP over WDM technology solution is adopted and left to routers, it will lead to huge pressure on core routers and incur a lot of additional costs. Since ASON adopts OXC-based all-optical switching, it can greatly reduce the pressure on IP router service processing capacity and expansion, thus greatly reducing the total investment cost.

Second, precisely because ASON uses OXC-based all-optical switching, the optical signals for straight-through services are routed at the optical layer, which minimizes the signal delay and signal jitter brought about by IP routers, which is conducive to ensuring QoS.

At the same time, with the development of 3G mobile services, the operator's network facilities must also be changed. First of all, the number of European pulse code modulation interface (E1) and synchronous transmission module (STM) 1/16, etc. will be greatly increased, especially in the aggregation, resource sharing and interoperability with other operators' network gateway/core nodes. The current manual operation and configuration of transmission resources is very inflexible and costly.

Therefore, the introduction of ASON by OXC in core nodes will significantly reduce the cost of resilient service provisioning, equipment maintenance and leased lines, and provide new services such as optical virtual private networks, enhanced leased line services and on-demand bandwidth allocation services.

In addition, ASON supports mesh networking and has a fast and effective network protection and recovery mechanism, which makes the transmission network have strong network survivability.

In short, with the development of 3G network IP-based and large granularity, the advantages of this A-SON+WDM technology-based 3G core transmission network construction will become more and more obvious. This solution is not only a more ideal solution for the current 3G core transmission network, but also follows the development trend of the whole optical transmission network.

The development of optical transmission network and communication network is both a mutual adaptation and a mutual promotion process. Under the continuous promotion of IP-based 3G network, optical transmission network also evolves to optical-based packet transmission network, and intelligence and high speed and large capacity are the direction of its development. At the same time, the development of optical transmission network technology will also effectively promote the development of 3G network.