Patent ID: 8149784

Claim:
A bridge-based Radio Access Station (RAS) backbone network, comprising: a plurality of Base Station Bridges (BSBs) having Layer 2 (L2) switches, in communication with a plurality of RASs; a plurality of Site Core Bridges (SCBs) having Layer 2 (L2) switches, connected to a part of the BSBs in a lower layer and forming a core network, each of said plurality of SCBs having information regarding Mobile Nodes (MNs) within their respective core network; and a Home Location Register (HLR) for managing a configuration information of network entities by storing Internet Protocol (IP) addresses and Media Access Control (MAC) addresses of the Mobile Nodes (MNs) within the backbone network and the addresses of SCBs to which the MNs belong in a table, wherein each of the SCBs: statically preserves the MAC address of a same external default router, for relaying an egress frame, statically registers the individual MAC address of the each SCB in other SCBs in the core network beforehand, detects a destination MN that an MN within a site of the each SCB wants to communicate with through the HLR, determines whether said destination MN is within its core network; and sends a frame to an SCB of a site to which the destination MN belongs or the MAC address of the external default router, when the destination MN is not within its core network.