Technical Paper Review: Reconfigurable Architecture and Mobility Management for Next-Generation Wireless IP Networks http://nthur.lib.nthu.edu.tw/handle/987654321/42070 Shun-Yi Jheng 2015/04/07 

Abstract & Introduction (1) ● Radio Systems ○ Small areas, Higher data rates, Lower power ■ WiFi v.s. 3G ● Wireless System ○ Radio Access Networks (RANs) & Core Network ● Difficult to roam from one system to another ○ Incompatible wireless systems. ○ Different RANs optimized for different environments and requirements. ○ Different standards, different core networks and protocols. ■ 3GPP, 3GPP2, WiMAX 

Abstract & Introduction (2) ● How to roam among heterogeneous networks easily? ○ One-to-one consideration of each specific system? ○ A terminal with a multi-mode radio or multiple radio interfaces, connect to a common core network? ■ only allow a terminal roam into few predefined radio systems. ■ Software Defined Radio (SDR) has been proposed. 

Abstract & Introduction (3) ● RAMP - Reconfigurable Architecture and Mobility Platform ○ Provide a long-term solution to fit different requirements of mobility management dynamically. ○ Integrate heterogeneous wireless networks. ○ Programmability v.s. Security concern ■ Users can only choose predefined modules to execute rather than programing the network freely. ○ A complete reconfigurable system which includes network and terminal. ○ Can be realized without changing the standard IP protocols. ○ Not incur high signaling cost. 

Mobility Management Protocols ● Mobile IP (MIP) ○ Support terminal mobility in IP networks without changing IP routing. ○ Frequent location update, long handoff delay, and long end-to-end latency. ● Macro-mobility management - Based on MIP ● Micro-mobility management ○ Limits frequent handoffs into micro-domains to reduce handoff latency. ○ Tunnel-based protocols ■ employ a hierarchical mobility architecture or require a mobility gateway to tunnel packets to and from mobile stations. ○ Host-specific-routing-based protocols ■ adopt new routing schemes to support mobility within the micro-domain. 

Reconfigurable Architecture and Mobility Platform ● Network Node (NN) & Mobile Node (MN) Architecture ● Realization in IP Networks ● Processing Flow ● Characteristics of RAMP 

Analysis & Results ● Analysis of Signaling Cost in RAMP ○ The performance of other metrics heavily depends on the protocols incorporated into RAMP. 

Testbed & Experiments ● Reconfigurability ● Coexistence ● Summary ○ RAMP architecture can be realized in real life. ○ Can use layer-2 mechanisms to reduce handoff latency. ○ RAMP can coexist with standard IP networks. 

Conclusion ● Not be necessary/possible to define a single universal Core Network. ○ Different core networks and protocols could coexist. ○ RAMP is a first step toward this paradigm. ● RAMP architecture ○ Network Node (NN) ○ Mobile Node (MN) ● Analytical models to compare the signaling cost ○ RAMP does not incur high signaling cost. ○ RAMP can achieve reconfigurability for various mobility management protocols. 

Future Work ● Security Problems ○ Security protocols ■ Different security protocols could be implemented in RAMP. ○ Architecture security ■ Analyzing the proposed architecture with security consideration. ● The reconfigurability of macro-mobility management ● How to incorporate the newly evolving networks defined by 3GPP and 3GPP2.