关键词: 城域传送网, 分时长期演进, 分组传送网, 光传送网, 三层虚拟专用网

Abstract:

In order to solve the TD-LTE (Time Division Long Term Evolution) business bearing demands, we analyzed the mobile metropolitan area transmission network status, the main technical characteristics of TD-LTE and its carring needs. And the technology choice of the TD-LTEoriented mobile metropolitan area transmission network, presents TD-LTEoriented mobile metropolitan area transmission network should fully adopt PTN (Packet Transport Network) Network technology, with the core layer PTN supporting L3-VPN (Layer3-Virtual Private Network) program as its specific network model, introduces OTN (Optical Transport Network) technology into the core and converge layer. Forms the mobile metropolitan area transmission network by OTN+PTN, then combines the mobile metropolitan area transmission network status. The network structure of TDLTEoriented mobile metropolitan area transmission network was presented. The construction thought of the future mobile metropolitan area transmission network access was provided, converge and core layer, to guide the construction of the China mobile metropolitan area transmission network.

Key words: metropolitan area transmission, time division long term evolution (TD-LTE), packet transport network (PTN), optical transport network (OTN), layer3-virtual private network (L3-VPN)