Patent ID: 8059666
Filing Date: 2011-11-15
Classification: H04W,Y02D

Abstract:
1. A bridge-based Radio Access Station (RAS) backbone network system, comprising: a Home Location Register (HLR) for: a plurality of Base Station Bridges (BSBs) coupled to a plurality of RASs, each BSB having a Layer 2 (L2) switch; a plurality of Site Core Bridges (SCBs) communicatively coupled to the HLR and connected to a part of the plurality of BSBs under the SCBs, each SCB having an L2 switch forming a core network, for: a plurality of Site Internal Bridges (SIBs) being intermediate bridges between the plurality of SCBs and the plurality of BSBs, wherein, each of the plurality of BSBs, the plurality of SCBs, and the plurality of SIBs and the HLR has a routing cache for storing location information about active-mode MNs in a soft state with aging times set for the location information according to periodic route-update messages received for registration updating from the active-mode MNs, and wherein, each of the plurality of BSBs, the plurality of SCBs, and an SIB selected from the plurality of SIBs has a paging cache for storing location information about idle-mode MNs in a soft state with aging times set for the location information according to periodic paging-update messages received for registration updating from the idle-mode MNs, wherein the aging time associated with the paging cache is restarted by every packet transmitted by a corresponding MN and the aging time associated with the route cache is restarted by one of: a data packet and a route-update packet, the route-update packet being transmitted by a corresponding MN and wherein each of the plurality of BSBs, the plurality of SCBs, and the selected SIB relays a packet to a destination MN, referring to information in the routing cache, relays the packet to the destination MN, referring to the paging cache, if the routing cache does not have information about the destination MN, and broadcasts a paging packet downstream, if the paging cache does not have information about the destination MN.