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Flat IP architecture identifies devices using symbolic names instead of the hierarchical network layout commonly used with IP addresses. It can be referred to as Smart IP addresses. This form of internet protocol system is of interest to mobile broadband network operators.
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To address the need for real-time data applications delivered over mobile broadband networks, wireless operators are adopting flat IP network architectures.[1]
Advanced Base Stations: These integrate radio control, header compression, encryption, call admission control, and policy enforcement with IP/Ethernet interfaces. Base station routers aim to provide simpler, lower-latency 3GPP/2 networks. Notable players in this area are Alcatel-Lucent, Airvana, and Ubiquisys.
Direct Tunnel Architecture: This architecture is emerging as a viable evolution path, with all major vendors currently supporting it. Direct Tunnel Architecture bypasses the SGSN on the user plane. Nokia-Siemens's Internet High-Speed Packet Access ([IHSPA]) architecture further advances this concept by removing the RNC from the data path, thereby simplifying the architecture and reducing latencies even further.[3]
WiMax Access Services Network: This was the first standardized IP-centric mobile network architecture and established principles now being adopted across the industry.[4] Over time, HSPA and LTE networks have become the preferred technologies for most operators.
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