Abstract: A method of managing IP addresses in a device performing communication using the IP address includes acquiring IP addresses by a plurality of methods; storing the plurality of IP addresses such that the methods are discernable when the plurality of acquired IP addresses are the same, determining an effective IP address used in the communication from the plurality of IP addresses according to predetermined priority in the methods, and setting the IP address to be used in the communication; and determining the valid IP address according to the priority from the stored IP addresses except for the disappearing IP address when the set IP address disappears, and setting the IP address to be used in the communication.

Abstract: A method for network communication under SNMP includes: producing an access request when a first device accesses management information stored in a second device, the request containing additional information including identification information of the first device or identification information of a user of the first device in a value field included in a data field that contains an identifier field and the value field; transmitting the access request to the second device; and permitting the transmitted access request so that the number of devices or users accessing the second device may not exceed a predetermined number on the basis of the identification information of the first device or the user contained in the transmitted access request and identification information of a device or a user accessing the management information.

Abstract: A network communication apparatus which can transmit multicast packets includes a communication interface unit that has a plurality of IP addresses allocated thereto and transmits multicast packets using each of the plurality of IP addresses as a transmission source, and a multicast control unit that controls transmission of the multicast packets from the communication interface unit, groups the plurality of IP addresses in a plurality based on predetermined criteria, and sequentially transmits the multicast packets using one IP address belonging to each group as a transmission source with respect to all the IP addresses in each group.

Abstract: A communication control server includes an information holding part and a communication control part. The information holding part is configured to hold terminal registration information regulating groups built for a plurality of services, respectively, which are provided within the communication network by a plurality of service providing servers, and the terminal registration information associates the groups with information of terminals which belong to the groups.

Abstract: A network communication device includes a first control unit that has a first application, a second control unit that has a second application and a communication processing section, and a shared storage unit, wherein, in a first mode where the first control unit is in an operation state, the first application performs a predetermined process using the shared storage unit, and the communication processing section performs communication in response to an instruction from the first application, and wherein, if the first control unit transitions from the first mode to a second mode in which power consumption is lower than that in the first mode, the first application stops execution of the process, the second application performs a process based on data related to the first application, stored in the shared storage unit, and the communication processing section performs communication in response to an instruction from the second application.

Abstract: A first communication device includes a security policy storing unit that store a security policy and a default policy applied to communication to which the security policy is not applied, a communication unit that performs communication, and a communication control unit that performs an encryption process and a decryption process according to the default policy when the communication does not correspond to the target of the policy. A second communication device includes an input and output receiving processing unit that receives an input of an encryption key of the default policy of the first communication device, a communication control unit that generates a policy including an encryption method of the default policy and the input encryption key and performs an encryption process and a decryption process in communication with the first communication device according to the policy, and a communication unit that performs communication of a communication packet.

Abstract: An electronics device, which is connected to a host apparatus via a wireless communication, includes a communication section configured to perform a wireless communication, and a communication control section configured to, if a start-up timing of the electronics device is earlier than any start-up timing of at least one electronics device other than the electronics device, perform control, as a master device, so as to cause the communication section to perform relaying of a wireless communication between the host apparatus and the at least one electronics device other than the electronics device, and if a start-up timing of the electronics device is later than any start-up timing of the at least one electronics device other than the electronics device, perform control, as a sub device, so as to cause the communication section to perform a wireless communication with the host apparatus via the master device.

Abstract: The present invention is directed to a display for easily understanding time changes of communication conditions of channels using a plurality of sub-carriers. Layers corresponding to the plurality of channels are displayed along the time base in such a manner that width of each layer is determined in accordance with the number of sub-carriers used for each channel at any given time. Additionally, colors or patterns of each layer may be modified in accordance with modulation types or power levels of the corresponding layer. The relationship between colors or patterns of the layer and modulation types or power levels is displayed.

Abstract: A service providing apparatus that provides a digital processing service and performs wireless communication with a service use apparatus that uses the service includes: a wireless communication unit that performs wireless communication; an interface unit that enables the attachment of a portable wireless communication device that performs wireless communication for the apparatus to which the wireless communication device is attached when the wireless communication device is attached; a generation unit that generates configuration information for wireless communication; and a configuration unit that executes, on the wireless communication device attached to the interface unit, based on the configuration information generated by the generation unit, a configuration process that enables wireless communication between the service use apparatus to which the wireless communication device has been attached and the wireless communication unit.

Abstract: A communication system includes an SA parameter exchanging portion that builds and deletes SA, and a nonvolatile storage portion that stores at least a part of information for the SA parameter set, wherein, in a case where a printing device is initialized, the printing device has a message transmission portion that transmits a predetermined message to a communication device if a part of information is stored in a nonvolatile storage portion, and the communication device deletes information for performing IPsec communication with the printing device from a nonvolatile storage portion of the communication device in response to reception of the predetermined message.

Abstract: A network communication device includes a first control unit that has a first application, a second control unit that has a second application and a communication processing section, and a shared storage unit, wherein, in a first mode where the first control unit is in an operation state, the first application performs a predetermined process using the shared storage unit, and the communication processing section performs communication in response to an instruction from the first application, and wherein, if the first control unit transitions from the first mode to a second mode in which power consumption is lower than that in the first mode, the first application stops execution of the process, the second application performs a process based on data related to the first application, stored in the shared storage unit, and the communication processing section performs communication in response to an instruction from the second application.

Abstract: A network communication apparatus which can transmit multicast packets includes a communication interface unit that has a plurality of IP addresses allocated thereto and transmits multicast packets using each of the plurality of IP addresses as a transmission source, and a multicast control unit that controls transmission of the multicast packets from the communication interface unit, groups the plurality of IP addresses in a plurality based on predetermined criteria, and sequentially transmits the multicast packets using one IP address belonging to each group as a transmission source with respect to all the IP addresses in each group.

Abstract: A method of managing IP addresses in a device performing communication using the IP address includes acquiring IP addresses by a plurality of methods; storing the plurality of IP addresses such that the methods are discernable when the plurality of acquired IP addresses are the same, determining an effective IP address used in the communication from the plurality of IP addresses according to predetermined priority in the methods, and setting the IP address to be used in the communication; and determining the valid IP address according to the priority from the stored IP addresses except for the disappearing IP address when the set IP address disappears, and setting the IP address to be used in the communication.

Abstract: A method for network communication under SNMP includes: producing an access request when a first device accesses management information stored in a second device, the request containing additional information including identification information of the first device or identification information of a user of the first device in a value field included in a data field that contains an identifier field and the value field; transmitting the access request to the second device; and permitting the transmitted access request so that the number of devices or users accessing the second device may not exceed a predetermined number on the basis of the identification information of the first device or the user contained in the transmitted access request and identification information of a device or a user accessing the management information.

Abstract: A user PC 20 prepares a retrieve request by storing a SNMP command and a predetermined processing execution condition into a retrieve request of a SLP and transmits and outputs the prepared retrieve request to a printer 40 and others by multicast. Receiving the retrieve request, the printer 40 obtains and executes the SNMP command stored in the retrieve request of the SLP and processes a response to the retrieve request when the execution result meets the processing execution condition. Thus, the SNMP command is executed by receiving the retrieve request of the SLP and the response to the retrieve request of the SLP is processed corresponding to the execution result, it is not necessary to separately transmit or to obtain the request process of the SLP and the retrieve request of the SNMP through the network and the execution result of the SNMP command may be reflected to the process of the SLP.

Abstract: A first communication device includes a security policy storing unit that store a security policy and a default policy applied to communication to which the security policy is not applied, a communication unit that performs communication, and a communication control unit that performs an encryption process and a decryption process according to the default policy when the communication does not correspond to the target of the policy. A second communication device includes an input and output receiving processing unit that receives an input of an encryption key of the default policy of the first communication device, a communication control unit that generates a policy including an encryption method of the default policy and the input encryption key and performs an encryption process and a decryption process in communication with the first communication device according to the policy, and a communication unit that performs communication of a communication packet.

Abstract: An electronics device, which is connected to a host apparatus via a wireless communication, includes a communication section configured to perform a wireless communication, and a communication control section configured to, if a start-up timing of the electronics device is earlier than any start-up timing of at least one electronics device other than the electronics device, perform control, as a master device, so as to cause the communication section to perform relaying of a wireless communication between the host apparatus and the at least one electronics device other than the electronics device, and if a start-up timing of the electronics device is later than any start-up timing of the at least one electronics device other than the electronics device, perform control, as a sub device, so as to cause the communication section to perform a wireless communication with the host apparatus via the master device.

Abstract: The present invention is directed to a display for easily understanding time changes of communication conditions of channels using a plurality of sub-carriers. Layers corresponding to the plurality of channels are displayed along the time base in such a manner that width of each layer is determined in accordance with the number of sub-carriers used for each channel at any given time. Additionally, colors or patterns of each layer may be modified in accordance with modulation types or power levels of the corresponding layer. The relationship between colors or patterns of the layer and modulation types or power levels is displayed.

Abstract: A login system is adapted to be connected to a network for logging in a plurality of servers connected to the network. A reception processor is operable to receive a designation of at least two of the servers and a password from a user. A login processor is operable to automatically execute a login processing with respect to at least one of the designated servers for which the received password is valid.

Abstract: A service providing apparatus that provides a digital processing service and performs wireless communication with a service use apparatus that uses the service includes: a wireless communication unit that performs wireless communication; an interface unit that enables the attachment of a portable wireless communication device that performs wireless communication for the apparatus to which the wireless communication device is attached when the wireless communication device is attached; a generation unit that generates configuration information for wireless communication; and a configuration unit that executes, on the wireless communication device attached to the interface unit, based on the configuration information generated by the generation unit, a configuration process that enables wireless communication between the service use apparatus to which the wireless communication device has been attached and the wireless communication unit.