92results about How to "Optimize the way of communication" patented technology

A wireless communication system includes a transmitting device and a receiving device each including a plurality of antennas. A plurality of streams are subjected to spatial multiplexing and are transmitted in a downlink in which packets are transmitted from the transmitting device to the receiving device. In the transmitting device, each of the plurality of transmission streams is divided into a plurality of bit-series groups having decoding characteristics to which priority levels are assigned, the bit-series groups are subjected to encoding processes and modulating processes in accordance with the priority levels and further subjected to weighting and synthesizing, and each of the plurality of transmission streams in which a plurality of bit series items are synthesized with one another is spatially multiplexed and transmitted.

The directivity of an antenna is efficiently trained between a transmitter and a receiver, and the training results are efficiently fed back from the receiver to the transmitter.

In the case where the order of transmit beam patterns corresponding to individual time slots in a beam training signal, and the names representing the respective transmit beam patterns have already been shared through pre-setting or pre-negotiation between the transmission and reception, the receiving end can estimate received power for each time slot on the basis of transition of the received power of the beam training signal, and writes the transmit beam pattern name or time slot number corresponding to the time slot that realizes the maximum received power, in a notification signal for feedback.

A wireless communication apparatus for receiving spatially multiplexed signals in which a plurality of streams are spatially multiplexed, using a plurality of antennas, includes the following elements: a channel matrix estimator for estimating a channel matrix for multiplexed channels; a spatial decoder for spatially decoding received signals each of which has been received by a corresponding antenna so as to separate the received signals into individual stream signals by obtaining an antenna weight matrix from the estimated channel matrix, and then multiplying each received signal by the antenna weight matrix; a likelihood information estimator for estimating likelihood information using the estimated channel matrix, the antenna weight matrix, and estimated noise power; and a soft decision decoder for performing soft decision decoding on each stream signal on the basis of the estimated likelihood information.

Frames in a variable length frame format which are addressed to a plurality of users are multiplexed and preferably transmitted.

Data frames having different lengths are multiplexed on a same time through space division multiple access, but since the multiplexed frames are transmitted while eventually having a same length, when the multiplexed data frames from the access point STA0 are received in the respective communication stations STA1 to STA3 in FIG. 4 or when data simultaneously transmitted from the respective communication stations STA1 to STA3 are received in the access point STA0 in FIG. 5, it is possible to eliminate an operation instability of AGC.

While directional communication using millimeter waves is realized, the number of communication stations through which simultaneous communication is possible is increased to increase the throughput of the entire system.

A communication apparatus stores, as a stop setting person direction, a beam direction in which received electrical power when an RTS or a CTS destined for another station is received becomes a maximum and then sets a transmission stop period. Within the transmission stop period, only when the direction of a frame transmission destination is separate from the stop setting person direction, transmission of frames is performed by directing a transmission beam toward the frame transmission destination. Whereas a hidden terminal does not unnecessarily stop a frame transmission operation, the hidden terminal is not against the intention of requesting the setting of the transmission stop period.

To securely transmit content through remote access via an external network, such as a WAN, while exceeding restrictions of an RTT and a TTL.

A way of handling a flag for controlling remote access of content is explicitly defined, and an authentication method is explicitly defined when a content using device performs remote access. Thus, also in remote access, similarly to access of the related art in a household, a copyright protection environment of content based on the DTCP-IP is constructed.

The system includes user terminal and group address book server. The user terminal communicates with the group address book server through network, and is used to send user's service request. The group address book information is saved in the group address book server and is maintained renewed by system administrator. The group address book server is used to receive and process the service request from user terminal, and to relevant service response to the user terminal.

Even when the lengths of data items to be transmitted to users are not the same, the frames multiplexed at the same time finally have the same frame length and are transmitted.

Even when the lengths of frames for the users are not the same at the time when a transmission request is received from a higher layer, a communication apparatus reconfigures at least two of the frames having short lengths into a frame having a long length through Aggregation so that the frames finally have the same frame length and transmits the frames at the same time in a multiplexed manner. On the transmitter side, the transmission power used per destination communication station can be increased due to a decrease in the total number of multiplexed frames. On the receiver side, an unstable AGC operation can be prevented.

To appropriately effect a coordination with a plurality of communication parties that perform a millimeter wave communication.

Transmission and reception beams of the respective terminal stations are directed to an access point, a valid communication link based on the second communication method is utilized as a link for a high speed data transmission between the access point and the respective terminal stations. Of course, the communication link based on the first communication method between the access point and the respective terminal stations is valid and is utilized as a link for the coordination. As the transmission and reception beams are not directed between the terminal stations, the communication link based on the second communication method is invalid, but the valid communication link based on the first communication method can be utilized as the link for the coordination.

A multifunction traffic control and information system of the present invention includes external condition sensors and various devices each having one or more display portions to display alphanumeric messages and a local communications module functionally linked to a local network. At least one device further includes a cellular communications module and a system controller. The controller receives a display data string including a message displayable by one or more of the devices, as transmitted from a remote source via a cellular network, determines at least one of the devices to display the message, and routes the message to at least one display portion associated with the one or more determined devices. The controller further generates a return data string based on external condition data sensed by the one or more sensors, and transmits the return data string across the cellular network to the remote source.

Space-division multiple access is optimally realized while avoiding inter-network interference.

Time usage information for transmission sequence units is exchanged among different networks or non-adjacent equipment, and on the basis of this information, a station that initiates a transmission sequence unit disposes the start time of its own transmission sequence unit in a time slot which is not being used by an adjacent network or adjacent equipment. As a result, multiple wireless networks or wireless communication devices are able to utilize a channel by time division even in cases where exclusive placement of frequency channels is difficult, and efficient space-division multiple access can be realized.

The invention discloses a direct radiation wireless digital communication system based on a digital programmable metamaterial, which comprises a transmitting system and a receiving system, wherein information transmitted by the transmitting system is loaded on the programmable metamaterial and is directly radiated to free space under irradiation of a feed antenna in a constantly-changing far-fieldpattern form; and the receiving system summarizes electric field values received by receiving antennas at different locations in a far-field area to obtain the far-field pattern, and the transmittedoriginal information is restored through a mapping relationship between the far-field pattern and a coding sequence. The communication system provided by the invention saves a digital-to-analog conversion module and a mixing module, the complexity of the communication system is greatly simplified, and the cost of the communication system is reduced; inherent confidentiality is realized, the transmitted information can be ensured not to be intercepted from a single point or a non-key point from the lowest physical level, the performance can be enhanced easily, and the abilities of self adaptation and self perception are achieved.

The embodiment of the invention discloses a method and device for adding a contact and relates to the mobile communication field. The method and the device are invented for making it convenient for a user to add a communication number to the contact. The method for adding the contact comprises the steps of monitoring and obtaining an incoming call number or an outgoing call number of current communication, judging whether the number meets the preset condition reminding the user to add the contact, and reminding the user whether to add the number to the contact if the number meets the preset condition reminding the user to add the contact. The device for adding the contact comprises a monitoring unit used for monitoring and obtaining the incoming call number or the outgoing call number of current communication, a judging unit used for judging whether the number meets the preset condition reminding the user to add the contact, and a reminding unit used for reminding the user whether to add the number to the contact if the number meets the preset condition reminding the user to add the contact. The method and the device are suitable for adding the communication numbers of contacts.

The invention discloses a multichannel man-machine interaction table surface television. A laser screen scanning device is installed on the outer surface of a television screen; when a finger or an object is in touch and carries out multichannel interaction with the outer surface of the television screen, a laser screen is intercepted by touch; a reflecting light spot image signal of man-machine interaction is formed on the surface of the screen; the signal is collected by a recognizing device and forms a recognizing control signal for being transmitted to a computer program processor device to be fused with the surface display of the television screen after analyzing man-machine interaction signals of all channels; and the recognizing control signal can also be used for starting multichannel man-machine interaction instruction executing operation, such as near field communication for carrying out communication interaction between a television and a mobile phone, and the like. The invention also discloses a method for fixing a table surface television casing and a high-thickness transparent screen base. The connecting positions of the high-thickness transparent screen base and four edges of an upper opening of a table television casing are made into a plurality of through holes for fixing screws so that the high-thickness transparent screen base is tightly fixed on the table surface television casing.

The invention is concerned with the based band signal transmission technique through the electric power line for argent communication of the electric power modem. It includes: the ground conversion unit (-) with one end connects the first satellite acceptance emission unit (-) through the net and the other end connects the first assistant unit (-) based on the IP equipment, and the first satellite acceptance emission unit (-) connects the master station unit (-) through the wireless satellite transmission; the master station unit (-), then through wireless satellite transmission, connects the second satellite acceptance emission unit (-), which meets the second assistant unit (-) connection based on the IP equipment through the net; the ground transition unit (-) turns the present electric power line to net for operating through the pair of the electric power modem.

A user equipment (UE) comprises a radio having TX and RX paths that include a duplexer, thus facilitating a full-duplex mode. The radio may also have TX and RX paths that exclude the duplexer, and which thus facilitate a half-duplex mode. The UE may be configured to autonomously and opportunistically switch from the full-duplex mode (the paths that include the duplexer) to the half-duplex mode (the paths that exclude the duplexer) when the UE desires to avoid the path loss caused by the duplexer, e.g., to temporarily receive with greater sensitivity and/or transmit with more power, during poor channel conditions. At other times the UE may autonomously decide to remain in full-duplex mode to achieve reduced transmission time, e.g., during time-critical communications such as VoLTE. The UE may autonomously determine whether to use full or half-duplex mode, i.e., without requiring any coordination with network-side devices.

The embodiment of the invention provides a satellite short-data communication method, a satellite short-data communication device and a satellite short-data communication system between a ship and a shore. The system comprises a ship satellite terminal, a satellite space segment, a ground station, a land terminal and the satellite short-data communication device, wherein the satellite space segment comprises a maritime satellite covering the Indian Ocean region and the Pacific Ocean region, and a maritime satellite covering the Atlantic Ocean region; the ground station comprises a first maritime satellite ground station and a second maritime satellite ground station, wherein the first maritime satellite ground station is communicated with the maritime satellite covering the Indian Ocean region and the Pacific Ocean region and the second maritime satellite ground station is communicated with the maritime satellite covering the Atlantic Ocean region; and the satellite short-data communication device is connected with the first ground station, the second ground station and a land user terminal, receives short messages sent by the land terminal, and selects to send the short messages to the first ground station or the second ground station according to the sate of the ship satellite terminal, or sends the short messages received from the first ground station or the second ground station to the land terminal. The system realizes short-message communication between a global sailing ship and the land user terminal.

A system and method are provided for the delivery of perishable products such as dairy products wherein the system combines a wholesale distribution network with a residential delivery network. A delivery hub receives perishable products from a distributor and stores and packages same for downstream delivery to the customers subscribing to the system. The system incorporates the use of low cost operational components and a low overhead, delivery-only storefront or facility. Additionally, two primary low cost operational components would be utilized, namely a low-cost delivery vehicle 15, such as an electric passenger sedan, and low-cost, long-lasting delivery packages 16, such as iceless cooler cases. The cooler cases are preferably provided as iceless cases that incorporate a gel technology that is pre-cooled at the storefront by a refrigeration unit wherein the cases 16 and gel technology retain the low temperature for an extended cooling time for delivery.

[Object] To suppress a use exceeding a personal use range when transmitting a content accumulated at home via an external network according to DTCP.

[Solving Means] A use of a content exceeding a personal use range by a third person is suppressed by allowing, only for a first predetermined period from a registration time and date of a terminal with respect to a server, a remote access to a content in the server from the terminal. Further, the use of a content exceeding a personal use range by a third person is suitably suppressed by restricting a content that the terminal is capable of using by a remote access to only those recorded before a time point that is a second predetermined period prior to the registration time and date of the terminal with respect to the server.