US 8,798,668 B2Granted

Call control system and call control method

AssigneeNEC Corporation

InventorYasuhiro Tani

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Abstract

A call control system performs call control for a terminal which accesses different radio access network systems. A communication exchange processing apparatus includes: a device storing maximum bandwidth for specified calls processed in the radio access network system; a device measuring present bandwidth for specified calls presently processed in the radio access network system; a device computing a ratio of the present bandwidth to the maximum bandwidth for specified calls; and a device sending specified call band ratio information indicating the ratio of present bandwidth to maximum bandwidth for specified calls to a radio network control apparatus in the radio access network system and connected to the present communication exchange processing apparatus. The radio network control apparatus provided in the radio access network system includes a device sending the specified call band ratio information to a terminal which is connected to the present radio network control apparatus by radio communication.

Claims5

Dependent claims

A call control system that performs call control for a terminal which accesses different radio access network systems, comprising:

a communication exchange processing apparatus that includes:
an emergency notification call maximum bandwidth storage device that stores a maximum bandwidth for emergency notification calls processed in a radio access network system to which the processing apparatus belongs;
an emergency notification call bandwidth measuring device that measures a present bandwidth for emergency notification calls presently processed in the radio access network system to which the processing apparatus belongs;
a band ratio computation device that computes a ratio of the present bandwidth to the maximum bandwidth for emergency notification calls;
and
a band ratio notification device that sends emergency notification call band ratio information which indicates the ratio of the present bandwidth to the maximum bandwidth for emergency notification calls to a radio network control apparatus which is provided in the radio access network system and is connected to the processing apparatus;
wherein the radio network control apparatus provided in the radio access network system includes an emergency notification call band ratio information sending device that sends the emergency notification call band ratio information to a terminal which is connected to the radio network control apparatus by radio communication, and
wherein the terminal includes:
an emergency notification call band ratio information receiving device that receives the emergency notification call band ratio information from each of the different radio access network systems;
and
a call connection processing device that issues an emergency notification call connected to the radio access network system which sent the emergency notification call band ratio information that indicates a minimum ratio.

8 more elements

A call control method used in a call control system that performs call control for a terminal which accesses different radio access network systems, wherein:

an emergency notification call maximum bandwidth storage device of a communication exchange processing apparatus stores a maximum bandwidth for emergency notification calls processed in a radio access network system to which the processing apparatus belongs;
an emergency notification call bandwidth measuring device of the communication exchange processing apparatus measures a present bandwidth for emergency notification calls presently processed in the radio access network system to which the processing apparatus belongs;
a band ratio computation device of the communication exchange processing apparatus computes a ratio of the present bandwidth to the maximum bandwidth for emergency notification calls;
a band ratio notification device of the communication exchange processing apparatus sends emergency notification call band ratio information which indicates the ratio of the present bandwidth to the maximum bandwidth for emergency notification calls to a radio network control apparatus which is provided in the radio access network system and is connected to the processing apparatus;
an emergency notification call band ratio information sending device of the radio network control apparatus provided in the radio access network system sends the emergency notification call band ratio information to a terminal which is connected to the radio network control apparatus by radio communication;
an emergency notification call band ratio information receiving device of the terminal receives the emergency notification call band ratio information from each of the different radio access network systems;
and
a call connection processing device of the terminal issues an emergency notification call connected to the radio access network system which sent the emergency notification call band ratio information that indicates a minimum ratio.

5 more elements

Dependencies are inferred from the claim text.