Patent ID: 8363584
Filing Date: 2013-01-29
Classification: H04L,H04W

Abstract:
1. A communications controller which is linked to an application server by way of a network interface, and which is linked further to a plurality of terminals by way of a plurality of base stations, said communications controller, comprising: said network interface for receiving information from said application server, and transmitting said information to said plurality of base stations by utilizing multicast communications flows, said multicast communications flows being established between said application server and said plurality of base stations; and a control unit that reserves a resource for multicast communications for, when, said network interface receives request information for requesting establishment of a new multicast communications flow, judging whether or not said new multicast communications flow can be established by the reserved resource of a base station with respect to a base station, based on communications quality parameters of the other multicast communications flows already established between said application server and said plurality of base stations, and a communications quality parameter of said new multicast communications flow, said new multicast communications flow being transferred by way of said base station, and establishing said new multicast communications flow by the reserved resource of a base station, if a result of said judgment on said base station is YES, said new multicast communications flow being transferred by way of said base station, wherein said network interface transmits said information to each of said plurality of base stations in such a manner that said multicast communications flow is incorporated into one communications tunnel, said control unit, when said network interface receives said information: requests said establishment of said new multicast communications flow, judges whether or not said new multicast communications flow can be established with respect to a base station, based on communications quality parameters of said other multicast communications flows incorporated into said communications tunnels, and a communications quality parameter of said new multicast communications flow, said new multicast communications flow being transferred by way of said base station, judges whether a summation of a product of said communications bandwidths and said weight coefficients of said other multicast communications flows incorporated into said communications tunnels already established with said base station, and a product of said communications bandwidth and said weight coefficient of said new multicast communications flow has exceeded a communications bandwidth limit of said base station, said new multicast communications flow being transferred by way of said base station, establishes said new multicast communications flow if a result of said judgment on said base station is YES, said new multicast communications flow being transferred by way of said base station, said communications quality parameters are communications bandwidths and weight coefficients, and establishes said new multicast communications flow if said summation has not exceeded said communications bandwidth limit of said base station, a summation of said communications bandwidth of said new multicast communications flow and said communications bandwidths of said already-established multicast communications flows of said base station having exceeded said communications bandwidth limit of said base station, and wherein said weight coefficients are determined according to service of said multicast communication flow.