Communication device, radio communication device, communication control method and radio communication method
AssigneeKYOCERA Corporation
InventorTomoyoshi Yokota
Life of this patent
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Abstract
VoIP packets as many as the number transmittable within a time period equal to a window T1 minus a window T2 are transmitted to a radio IP network 10A in a case where the bandwidth of the radio IP network 10A is determined to be of a size not capable of transferring VoIP packets within a predetermined delay time period. In addition, a remaining number of VoIP packets excluding the number of VoIP packets transmittable within the time period equal to the window T1 minus the window T2 are transmitted to a radio IP network 10B.
Claims16
A communication control device that controls a communication path to a radio communication device by use of a first radio IP network in which a first care of IP address is dynamically assigned to the radio communication device in accordance with a position of the radio communication device, and of a second radio IP network in which a second care of IP address is assigned to the radio communication device, the communication control device comprising:
- a processor configured
- to receive an IP packet transmitted from the radio communication device to a communication destination via the first radio IP network in a predetermined cycle, and to relay the IP packet to the communication destination;
- to determine whether or not a bandwidth of the first radio IP network used for receiving the IP packet from the radio communication device is of a size capable of transferring the IP packet within a predetermined time period, based on a number of already received IP packets that have been received from the radio communication device within a former half time frame;
- to transmit first uplink transmission control information to the radio communication device in a case where it is determined that the bandwidth is not of a size capable of transferring the IP packet within the predetermined time period, the first uplink transmission control information indicating an instruction to transmit, to the first radio IP network, IP packets as many as a number transmittable by use of the bandwidth within a latter half time frame subsequent to the former half time frame;
- and
- to transmit second uplink transmission control information to the radio communication device, the second uplink transmission control information indicating an instruction to transmit, to the second radio IP network, a remaining number of IP packets excluding the number of IP packets transmittable within the latter half time frame.
A radio communication device that executes communications with a communication destination via a communication control device by use of a first radio IP network in which a first care of IP address is dynamically assigned to the radio communication device in accordance with a position, and of a second radio IP network in which a second care of IP address is assigned to the radio communication device, the radio communication device comprising:
- a receiver configured to receive an IP packet transmitted from the communication destination via the first radio IP network in a predetermined cycle;
- a processor configured
- to determine whether or not a bandwidth of the first radio IP network used for receiving the IP packet from the communication control device is of a size capable of transferring the IP packet within a predetermined time period based on a number of already received IP packets that have been received by the receiver from the communication control device within a former half time frame;
- to add the first care of IP address to each of IP packets as many as a number transmittable by use of the bandwidth within a latter half time frame subsequent to the former half time frame, and to transmit first downlink transmission control information to the communication control device in a case where the bandwidth determination unit determines that the bandwidth is not of a size capable of transmitting the IP packet within the predetermined time period, the first downlink transmission control information indicating an instruction to transmit, to the first radio IP network, IP packets to each of which the first care of IP address is added;
- and
- to add the second care of IP address to each of a remaining number of IP packets excluding the number of IP packets to each of which the first care of IP address is added, and to transmit second downlink transmission control information to the communication control device, the second downlink transmission control information indicating an instruction to transmit, to the second radio IP network, the IP packets to each of which the second care of IP address is added.
A communication control method of controlling a communication path to a radio communication device by use of a first radio IP network in which a first care of IP address is dynamically assigned to the radio communication device in accordance with a position of the radio communication device, and of a second radio IP network in which a second care of IP address is assigned to the radio communication device, the method comprising the steps of:
- receiving an IP packet transmitted from the radio communication device to a communication destination via the first radio IP network in a predetermined cycle and relaying the IP packet to the communication destination;
- determining whether or not a bandwidth of the first radio IP network used for receiving the IP packet from the radio communication device is of a size capable of transferring the IP packet within a predetermined time period, based on a number of already received IP packets received from the radio communication device within a former half time frame;
- transmitting first uplink transmission control information to the radio communication device in a case where it is determined that the bandwidth is not of a size capable of transferring the IP packet within the predetermined time period, the first uplink transmission control information indicating an instruction to transmit, to the first radio IP network, IP packets as many as a number transmittable by use of the bandwidth within a latter half time frame subsequent to the former half time frame;
- and
- transmitting second uplink transmission control information to the radio communication device, the second uplink transmission control information indicating an instruction to transmit, to the second radio IP network, a remaining number of IP packets excluding the number of IP packets transmittable within the latter half time frame.
A radio communication method of executing communications with a communication destination via a communication control device by use of a first radio IP network in which a first care of IP address is dynamically assigned to the radio communication device in accordance with a position of the radio communication device, and of a second radio IP network in which a second care of IP address is assigned to the radio communication device, the method comprising steps of:
- receiving an IP packet transmitted from the communication destination via the first radio IP network in a predetermined cycle;
- determining whether or not a bandwidth of the first radio IP network used for receiving the IP packet from the communication control device is of a size capable of transferring the IP packet within a predetermined time period based on a number of already received IP packets received from the communication control device within a former half time frame;
- adding the first care of IP address to each of IP packets as many as a number transmittable by use of the bandwidth within a latter half time frame subsequent to the former half time frame, and transmitting first downlink transmission control information to the communication control device, in a case where it is determined that the bandwidth is not of a size capable of transmitting the IP packet within the predetermined time period, the first downlink transmission control information indicating an instruction to transmit, to the first radio IP network, the IP packets to each of which the first care of IP address is added;
- and
- adding the second care of IP address to each of a remaining number of IP packets excluding the IP packets to each of which the first care of IP address is added, and transmitting second downlink transmission control information to the communication control device, the second downlink transmission control information indicating an instruction to transmit, to the second radio IP network, the IP packets to each of which the second care of IP address is added.
Dependencies are inferred from the claim text.