Patent ID: 8446828
Filing Date: 2013-05-21
Classification: H04L,H04Q,H04W

Abstract:
1. A communication network comprising: a host network; a plurality of base stations; at least a mobile host capable of establishing links to said base stations; and a hierarchy-network of plural routers providing multiple-point routings between said base stations and said host network, and said routers including at least a primary page-area managing router for managing at least a page area for recording said mobile host and a secondary page-area managing router for back-up managing the page area, said primary and secondary page-area routers receiving a same routing information for managing the page area, said primary page-area router being designated by a primary flag that is ON, wherein said primary page-area managing router limits, within a predetermined number, the number of transfer-acceptable packets in unicast packets addressed to said mobile host and received in a first predetermined time period while said mobile host is in a stand-by state, so that said primary page-area managing router transfers only said transfer-acceptable packets to sub-ordinate routers managed by said primary page-area managing router, and said primary page-area managing router does not transfer exceeding transfer-requested packets received additionally to said transfer-acceptable packets in said first predetermined time period, and requests a caller, which transmits said unicast packets, to stop transmission of said unicast packets until a second predetermined time period has passed and then to restart the transmission of said unicast packets, and wherein when said primary router is not operating, said secondary router has a primary flag turned ON to become a new primary router that manages the page area with the previously received same routing information.