This paper introduces the concept and definition of broadband metropolitan area network,then discusses the functional architecture model of broadband metropolitan access network.

First,the paper presents conceptions,characteristics and structures of broadband metropolitan area networks,then presents main construction plan for broadband metropolitan area networks such as IP over ATM,IP over SDH,IP over WDM/DWDM,IP over RPR,IP over GE,IP over MSPP,finally presents the principle for construction plan and applications in the electric trades.

broadband metropolitan area networks is now focuses of communications networks development .

Study of mobile E-business based on IEEE 802.16A for BMAN;

Development prospects of broadband IP MAN;

Optimized Strategy and Application of the Broadband IP MAN;

Optimization and Practice of Fuzhou Unicom s Broadband IP MAN;