IP RAN is a dynamic and static integrated service bearer network solution

I. Development trend of integrated business and its new demand

1. Wireless to enter the broadband era, and each bit flow rate declines sharply, exclusive network mode is not adapted

December 2009 Global Wi-Fi has more than voice traffic. In 2010, with the scale application of intelligent wireless terminals, the gap between wireless data and voice traffic accelerates. It is expected that the global wireless business traffic has reached 2EB / month in 2015, with voice traffic only account for approximately 0.15EB / month, only 7.5%.

When the wireless broadband flouries, operator revenue growth is relatively slow. The exponential growth of wireless data traffic does not give operators, and the value of each bit is significantly reduced. From Informa 2010, data shows that China Mobile wireless data revenue (excluding SMS) is approximately $ 2.4 billion, it can be seen that this part of the income proportion is relatively small.

The traditional wireless load mode facing narrow-tiered voice is closed and exclusive, and the arrival of wireless broadband era makes this model to change. The traffic is controllable and per bit revenue is clear, then the construction of a exclusive bearing network is reasonable, and traffic is huge and changed in the radio broadband data era, and the gains per bit revenue is uncertain. Then you need an open and shared bearer network. Therefore, wireless broadband is caused to carry the sharing mode from the exclusive mode.

2, the essence of fixed business and mobile services is gradually converge, and multiple carrier networks are coexist, and it is not suitable for the development needs of operators.

After entering the comprehensive business operational era, operators are fully competitive in WCDMA, LTE, D / IPLC, MPLS-VPN, NGN, and IPTV services. In order to better support the development of fixed broadband, all kinds of lines and mobile data business development, saving the cost and operation and maintenance complexity and maximizing the improvement of basic resource utilization, operators have a network architecture requirement to support integrated bearing and open-style network architecture More strong.When planning the integrated network bearing target, you must analyze from the business flow of various business and business networks, type, QoS, etc., with high expansion, high reliability, and high security on the basis of fully combined local basic resources. Comprehensive bearing network with multicast business support and end-to-end management capabilities.

3, the base station continuously expanded the operation and maintenance problem

In order to improve coverage and access capability, the wireless expansion and site increases frequently, the cells are divided and extended, and the base station is inserted into the new base station and add a new base station controller, referred to as an inrange expansion, and will also be the base station of the same area to the same area The belit controller is adjusted. In TDM / ATM mode in the traditional point-to-point static connection, you need to adjust each link of each base station, which leads to the service interruption, and the operation and maintenance work is very large.

The carrier interface mainly based on N * E1 TDM / ATM will gradually allow an Ethernet interface that is mainly based on 100 m / 1000m, according to INFONECS data, 2010 mobile return IP / ETH-related investment accounts for 89%. IP is based on the link between the base station and the base station controller, the management system, the signaling / service gateway, provides the ability to flexiblely addressing the Mac / IP, no longer relying on manual all link relationships.4, the LTE network promotes the bearing flat

The base station connection requirements of GSM / UMTS are determined and single (base stations to base station controllers). The LTE network is flat, canceled the base station controller, and the signaling and flow communication generated when the base station controller is switched between the base stations requires the base station to establish a connection (X2) to solve, each base station and each adjacent base station. An X2 needs to be created room. Establishing X2 for tens of thousands of base stations clearly unrealistic (N2 issues), need to pass a switched routing network.

The multi-directional connection requirements of LTE are also reflected in the Pool deployment of business and signaling gateways. The business and signaling gateways can be multiple and different slices, apparently a carrier network that only provides point-to-point static connection designed for GSM / UMTS is not required, and the carrier network needs to support the LTE landscape (base station) and portrait (Base Station to Gateway) multi-point logical connection.

In summary, wireless step-by-step IP and broadband, its carrier network In addition to meeting the traditional GSM / UMTS TDM / ATM business, it is necessary to support shared, dynamic deployment requirements.Second, IP transformation of integrated business bearer

1, IP RAN is a dynamic integration integrated business bearing network solution

The IP RAN is based on the IP / MPLS standard system, and in order to adapt to the requirements of a variety of business deployment scenarios, it is learned from other technical specifications, including OAM, network management and other content, forming a bearer network solution that meets the regular deployment requirements. IP RAN supports rich routing protocol, dynamic forwarding, L3 VPN, multicast and other dynamic network deployments, these capabilities meet the needs of wireless evolution, laying the basis of multi-service bearing; at the same time IP RAN supports static configuration, based on NMS management, perfect DCN scenarios, support for point-to-point pipelines maintain compatible with static bearers.

Traditional IP Dynamic Network Operations is a problem, and IP RAN has great improvements in operation and maintenance capabilities. The operation and maintenance solution of IP RAN achieves SDH operators through masking technology, through template simplified operation and maintenance scenarios, via visualized service issuance, performance, etc. greatly improves the operation and maintenance efficiency of IP / MPLS network. At the same time, IP RAN has high precision, highly reliable transfer mechanism, including synchronous Ethernet clock, IEEE 1588V2 clock, and 1588ACR clock transfer mechanism, which can meet the clock frequency synchronization requirements between radio base stations and the high-precision synchronization requirements for phase synchronization in the LTE era. ;2, the dynamic capacity of IP RAN solves the operation and maintenance problem that the IP base station expansion and meets LTE flat demand

The front has been analyzed, and when the number of base stations is large and frequent, the static configuration link is the most painful point of operation and maintenance. When the base station IP is, we found this problem solution. With the addressing capability of the group, as long as the base station IP service is access to a dynamic forwarded network, the base station can find the corresponding controller according to the corresponding relationship of the source address, and the base station can find the corresponding controller. This automatic scheduling capacity of dynamic network greatly reduces the difficulty of network opening and maintenance.

LTE network flat multi-directional logical connection requirements use point-to-point pipelines that cannot be deployed and managed. IP RAN supported IP VPN is an ideal solution. Its natural Full Mesh traffic model, plug-and-play expansion capability can meet the change in the connection between the base station when the new base station or wireless network traffic is optimized, adjustment X2 connectivity while applying an ACL security policy support base station based on IP VPN. IP RAN already has LTE bearing capacity.3, IP RAN supports future evolution

From the perspective of development, the future carrier network of full business operators must be more business. Building a multi-service bearer network means that the operator means flexible and quick deployment services, calibrate competition, and increases overall operation and maintenance efficiency and reduces TCO due to unified technical solutions and business deployments, thereby occupying advantageous in the market.

In the future, the carrying demand is changed, while considering unifying the base station and other high-value services such as companies L2 / L3 VPN, NGN, then you need to choose a bearer platform with flexible extension capabilities to adapt to the future. New business deployment requirements.