687 results about "Communication status" patented technology

Provided are a stream distribution system and a failure detection method capable of easily identifying the cause of quality loss in stream distribution. This stream distribution system includes a first server for communicating with a client terminal via a router and sending stream data, and a second server configured as a redundant server of the first server and connected to the first server. The first server has a communication status notification unit for sending a connection management table concerning the communication with the client terminal to the second server. The second server has a packet recording unit for acquiring a mirror packet, which is a copy of a packet sent to the first server, from the router, and a network failure monitoring unit for detecting a failure in a network between the first server and the client terminal based on the connection management table and a packet buffer.

The objective of the present invention is to detect, using a universal method, any “movement” inside of the object being monitored, while maintaining the security of a container. The movement inside of the object to be monitored includes 1) a human movement when a human enters into a container to be monitored, 2) a movement to bring a foreign article in, 3) a movement to take cargo out. To achieve the objective, this invention uses the concept of a so-called “inside-seal”. In actual configuration, a plurality of communication units (communication nodes) are installed on the walls of the container. These communication units have a predetermined powered communication capability and form a communication network communicating with each other. A communication status between each node and all of the other nodes provided in the network, and a network graph matrix is generated which defines the nodal relationship between the nodes. Since the matrix is determined not only by the property of the object to be monitored, but also by the spatial condition within the container, it is possible to detect even a small change in the space. According to the first preferred embodiment, each node transmits a low power electric wave which can reach only neighboring nodes, and each node can transmit data to remote nodes only by relaying the data to the neighboring nodes. The relaying counts (HOP counts) of each node to communicate with all of the other nodes are obtained, and based on these relaying counts, a network graph matrix is generated which defines the relaying counts to communicate between all nodes. According to the second preferred embodiment, each node transmits UWB waves to all of the other nodes, which can reach to all of the other nodes, and the distances between all the nodes are measured and a network graph matrix between all the nodes is generated.

BACnet objects and methods for efficiently monitoring the communication status of networks and devices in a building automation and control system are presented. A pair of bus communication status objects, including a server object and a client object, provide the communication status of an MS/TP network as an OCTET String transmitted only upon a change of value (COV) of the communication status of a device on the network. Individual devices may be monitored with a device communication status object, in conjunction with or apart from the bus communication status objects. For MS/TP devices, automatic configuration and monitoring in a controller is provided. For other devices, a user interface is provided through a graphical tool to allow configuration to specify the desired device and/or network for monitoring.

A wireless terminal apparatus having a Wireless Local Area Network (WLAN) standard automatic change function and method thereof are provided. The wireless terminal apparatus comprises a memory for storing information of a condition change, a wireless communication module for communicating with a predetermined correspondent node according to a first WLAN standard, a communication status detection unit for detecting a communication status of the wireless communication module and determining whether an event occurs satisfying the condition for change, and a central processing unit, changing the first WLAN standard to a second WLAN standard and establishing a communication link. An optimum WLAN standard can be established and a communication is performed according to the WLAN standard.

A communication-status notification apparatus enabling a subscriber to observe various kinds of communication status in a network easily via the subscriber's own terminal in a communication system. The apparatus includes a request analysis section for discriminating whether or not voice data received by gateway equipment from a subscriber terminal contains a request on monitoring/controlling or notifying of a communication status in the network and for analyzing the content of the request when contains, a communication-status monitor/control section for monitoring/controlling the communication status responsive to the content of the request analyzed by the request analysis section based on a processing status of the voice data in the gateway equipment, and a communication-status notification section for notifying the subscriber terminal of the communication status monitored/controlled by the communication-status monitor/control section via the gateway equipment responsive to the content of the request analyzed by the request analysis section. The apparatus is useful when applied to VoIP gateway equipment or the like used for a VoIP communication system.

The present invention provides a method for operating a network system and a network system operated correspondingly for improving network resource reservations and allocations. Information included in signaling messages of a given protocol, like the resource reservation protocol (RSVP), which do not provide information about the actual communications status in the network. According to the invention, information concerning the communications/service quality of the network are collected from all over the network. In particular, such information is collected from all network domains and their routers, respectively. The collected information is communicated in the network by extending the signaling messages obtained on the basis of the given protocol. Utilizing the collected information, service quality negotiations between a server and its client are improved. This improvement can be achieved for network systems comprising a network domain serving a single client, and multicasting networks. Furthermore, the present invention provides a solution for pre-reservation of network resources which avoids an unnecessary reservation of network resources and a waste of network resources for subsequent resource allocations.

A method for prompt re-direction of uplink access of a specific user equipment is disclosed. For initial random access to a network, if a user equipment transmits a preamble, which includes information related to random access, to a network node, the network node sends grant/rejection information of the preamble and re-direction information as a response message to the preamble. In comparison with the related art which controls a rush of an access request of the user equipment through a second response message from the network node, since the rush of an access request is controlled by a first response message in the present invention, it is possible to promptly deal with abnormal communication status, thereby improving communication efficiency.

The invention discloses a simulation test system of train control system. A ground integrated simulation system can receive train operation-related information from a train-carried simulation system, and receive train information corresponding to the train ID from a CTC interface simulation system. The CTC interface simulation system carries out data communication with a wireless blocking center device, the ground integrated simulation system, and the train-carried simulation system. A TSRS interface simulation system carries out data communication with the train-carried simulation system andthe wireless blocking center device. The train-carried simulation system is used for simulating speed signals, braking signals, a handle position, and responder signals of a train-carried system, andrecording communication status of the train in real time. The train-carried control device is used for receiving ground information, generating speed mode curves and monitoring the running of the train, and the wireless blocking center device is used for managing and controlling the running of the train.

A display apparatus, a terminal apparatus, and controlling methods are provided. The display apparatus includes: a communicator to communicate with a terminal apparatus or a relay server in order to receive collected status information about at least one peripheral device from the terminal apparatus, a display unit to display a user interface (UI) screen; and a controller to generate a control UI for controlling the at least one peripheral device or a security UI for monitoring a peripheral space through the at least one peripheral device based on the status information about the at least one peripheral device and based on whether a communication with the terminal apparatus is possible, thereby controlling a home device t in real time according to a communication status with the terminal apparatus.

A remote medical device programming system and method are provided for monitoring a communication signal during a remote programming procedure and generating a communication status signal for presentation on a display. The communication signal monitoring may include monitoring a communication link bandwidth on a communication network linking a remote programmer to a central programmer. The communication signal monitoring may also include monitoring a telemetry signal strength between the remote programmer and the medical device being programmed. The system and method further provide a fail-safe response to a communication status signal that does not meet predetermined safety criteria.

The invention discloses a method for recovering networks in a ring network. Ethernet switch equipment enters a communication status after an initial configuration and precise time synchronization based on an IEEE 1588 protocol. Each equipment according to the configuration of the network sends out time-sharing equipment statement messages and link circuit checking messages. The link circuit checking messages are sent by a multicast address in two ways; if a port of equipment receives no link checking messages of a connected port after the time out, then a network trouble can be determined and link circuit alarm messages are sent by the multicast address in two ways for alarming. The rest equipments in the ring network after receiving the link circuit alarm message, then empty an FDB list and utilize a backup link circuit to restart path learning. By adopting the method of the invention, any communication link circuit failure in the ring network can be quickly detected and correspondingly processed, thereby meeting the availability requirements of Ethernet communication by the industrial automatic field.

An embodiment of the invention discloses a wireless communication method, a base station and user equipment applicable to the technical field of communication. The wireless communication method includes that in a base station supported full-duplex wireless communication system, the base station needs to divide the user equipment within the scope of service thereof into groups, the user equipment in the same group are configured with a same wireless resource pattern, and the user equipment in different groups are configured with different wireless resource patterns. Not all the user equipment can receive uplink data transmitted by the other user equipment during communication process of multiple different user equipment, different in communication status in the same wireless resource, selected by the base station according to the configured wireless resource patterns, and only the user equipment among different groups can have different communication status in the same wireless resource, so that interference among the user equipment due to the fact that each user equipment can receive the uplink data of the other user equipment in a current full-duplex wireless communication system can be properly reduced.

Disclosed is an information distribution system in which a receiving terminal installed in a mobile object can reliably receive high quality distribution information from the beginning. The information distribution system comprises data transmission units, each for transmitting a plurality of data signals including same distribution information using a plurality of different radio channels with sequentially delaying the transmission start time of the data signals; an auxiliary transmission unit for transmitting signals according to communication status of the data transmission units; a communication control unit for controlling the auxiliary transmission unit and the data transmission units; and detection means for detecting the velocity control information for the mobile object. A receiving terminal for receiving the data signals transmitted from the data transmission units is installed on the mobile object. The communication control unit selects a data transmission unit in a communication status according to the velocity control information out of the data transmission units, and controls the auxiliary transmission unit so as to notify the receiving terminal of the communication information corresponding thereto.

An image distribution system, which is connected via a network with a client for displaying an image picked up by an image sensing unit of a server, judges a communication status of the network. In addition, in accordance with a result of the judgment, the image distribution system changes a user interface for selecting a function request command for the image sensing unit of the imaging apparatus.

An access point terminal includes: a communication-terminal-status determination unit which determines a communication status of one wireless communication terminal out of wireless communication terminals, by obtaining a wireless signal transmitted or received by the one wireless communication terminal; and a frequency control unit which uses (i) a first frequency band for wireless communication with the one wireless communication terminal and (ii) a frequency band other than the first frequency band for the wireless communication with one or more of the wireless communication terminals other than the one wireless communication terminal, when the communication-terminal-status determination unit determines that the communication status of the one wireless communication terminal satisfies a predetermined condition.

A handsfree video phone system includes a video phone terminal and a car device in which a microphone, a speaker, and a camera are connected with an instrument panel via a cable. The video phone terminal is connected with the instrument panel via a wireless communication medium. When the video phone terminal is brought into the vehicle, the instrument panel informs the video phone terminal of the attribute information on the system structure. According to the attribute information, the video phone terminal switches the paths of multiplexed audio-video data so as to replace a microphone, a speaker, a camera, and a display that have been built in the video phone terminal with the microphone, the speaker, the camera, and a display of the instrument panel when the status changes to the communication status.

The present invention relates to an information processing apparatus and method, a recording medium, and a program which allow a user to immediately and easily know whether or not transmission of desired data is completed and the direction of transmission of the data. Readers/writers 23-1 through 23-4 and RF tags 24-1 through 24-4 detect an electronic device which is placed adjacent thereto and the direction in which the electronic device is placed. The readers/writers 23-1 through 23-4 and the RF tags 24-1 through 24-4 obtain identification information of the electronic device when the electronic device placed adjacent thereto is detected. A communication unit 22 communicates with the electronic device over a network based on the identification information. A CPU 11 controls display so that an image corresponding to at least one of the communication status of data communicated over the network and the content of the data is displayed on an LCD 17 based on the direction in which the electronic device is placed. The present invention is applicable to an information processing apparatus such as a personal computer, a PDA, or a cellular telephone.