1948 results about "Low transmission" patented technology

A facility stores attachments for electronic mail messages so that the messages may be transmitted to the intended recipients without the attachments. The recipients may then review and / or download the attachments by contacting the facility. This facility is especially useful in instances wherein the attachments are large. The facility eliminates the need to store multiple copies of the attachment throughout a system; thus consuming a great deal of memory space. In addition, the facility prevents the recipient from extensive delays that are often associated with downloading email messages that contain large attachments via a dial-up connection with a low transmission rate. The facility may be realized as a server and may be a web server so as to provide access to the attachments via an IP network.

A plurality of content providers provide multiple resources to multiple clients. At least some of said resources are to be served to clients from a shared content delivery network (CDN) formed by a plurality of repeater servers. Each content provider provides at least some resources via one or more content sources associated with that content provider. Amounts of data transmitted by the CDN on behalf of each of the plurality of content providers are monitored. Based at least in part on said monitoring, requests for resources are selectively delivered at a lower transmission rate. The lower transmission rate is achieved by generating pauses or delays in the transmission.

A presentation system is disclosed for synchronizing a performance of a plurality of presentation content portions at a network node, wherein, when two such content portions are to be presented concurrently at the network node, at least one is delayed until the other such portion can be presented concurrently therewith. In one embodiment, the content portions are transmitted via at least a portion of the Internet to a plurality of network nodes, wherein the presentation system can distribute the presentation content data to the network nodes via a plurality of network routes and presentation formats. Additionally, the present invention can provide various portions of the content data from a plurality of network server nodes, and during a performance of the presentation, the presentation receiving network nodes can determine a particular variation of the presentation to retrieve from the network server nodes. In particular, the retrieval of presentation data depends upon the transmission characteristics of the network such as data transmission rate. Thus, if a low transmission data rate is detected at a first network node, presentation elements of a reduced size can be retrieved.

There is provided, for example, an apparatus, which is caused to select a transmission power configuration for a communication with at least one user terminal taking place on component carriers of a carrier aggregation configuration within a shared band, wherein the selection is between a low transmission power configuration applying a transmission power below a predetermined power threshold without a listen-before-talk approach and a high transmission power configuration applying a transmission power of at least the predetermined power threshold; and upon detecting that the selected transmission power configuration needs to be informed, cause an indication of the selected transmission power configuration to the at least one user terminal and at least one secondary cell.

The present invention employs a power control methodology that adapts to the transmission load associated with communications between a base station and a mobile terminal. In one example embodiment, the base station gradually adjusts the power data transmitted to the mobile terminal based on that associated transmission load. As a result, radio channel quality measurements influenced by that base station data transmission to the mobile terminal are not significantly affected by the transmit power adjustment. In other words, the rate at which the transmit power is changed is slower than the rate at which mobile stations measure channel quality. For example, mobile terminals may detect a signal-to-interference ratio every time slot and use that quality measurement for purposes of selecting a maximum transmission rate for the next time slot. The transmit power might be changed by an incremental amount once every ten time slots. By only gradually changing the base station transmit power, the accuracy of the mobile terminal channel quality estimates is not significantly affected. Moreover, if there is a relatively low transmission load, the base station does not waste resources or generate unnecessary interference by transmitting at maximum power.

A method of concatenation for LDPC encoding in an OFDM wireless system selects codewords based on the data packet payload size, wherein the payload size is the number of transmitted information bits in octets. For low transmission rates, shortening and puncturing across all codewords within the packet is applied to minimize OFDM symbol padding. For high transmission rates, only shortening across all codewords within the packet is applied to minimize OFDM symbol padding.

A system and method for facilitating the authentication of wireless devices in an environment with multiple wireless networks. A user wishing to join an operating wireless network can bring his wireless device within close physical proximity, for example, less than one meter, of a device in the network that he wishes to join. The user then presses an authenticate button, which causes both devices to enter a low transmission power mode. In such case, the devices are only capable of operation within the close proximity. Being in low power mode will diminish the possibility of eavesdropping on the authentication process. Power down mode also reduces the amount of message traffic in the area and saves scarce power and processing resources at the nodes, which are now out of range. Authentication then takes place in low power mode and once completed, both devices resume normal power levels and continue communicating normally.

A rotary shaft (3) and a rotation driven member (4) are so connected as to be capable of transmitting motive power when the rotary shaft (3) rotates relatively to the rotation driven member (4). A roller (6) gets displaced to a first position where a frictional force with an outer race (5) and the rotation driven member (4) decreases, thereby permitting transmission of a rotational force from the rotary shaft (3) to the rotation driven member (4). When the rotation driven member (4) rotates relatively to the rotary shaft (3), the roller (6) gets displaced to a second position where the frictional force with the outer race (5) and the rotation driven member (4) increases, thereby rotationally fixing the rotation driven member (4) with respect to the outer race (5). The power transmission from a brake apparatus (e.g., a parking brake apparatus) to an electric motor (2) can be hindered while permitting the power transmission to the brake apparatus from the electric motor (2) by using neither a worm exhibiting a relatively low transmission efficiency nor a worm wheel. In a state where the brake apparatus exhibits its braking force, the roller (6) receives the force from the brake apparatus and is thereby biased toward the second position, whereby a construction of a power transmission mechanism (50) can be simplified and costs can be reduced to such an extent.

Apparatus, and an associated method, for selecting the sequence in which frames of data are communicated in a multi-user, multi-rate, radio communication system. Data that is to be communicated at higher transmission rates to certain users is selected to be sequenced prior to transmission of data to be transmitted at lower transmission rates to other users. Polling is performed to determine at what transmission rates that data is to be communicated with individual ones of the users. And, an ordered sequence is formed. The ordered sequence defines sequencing of the transmission of data.

An information processing apparatus communicates with a separate passive device, to receive specific information from the separate device. The information processing apparatus includes an antenna, a transmitter and a receiver both coupled to the antenna, and a control unit for controlling the transmitter. The control unit causes the transmitter to transmit a signal at a low transmission power and waits for reception by the receiver of a response signal from the separate device. When the specific information is detected in the response signal, the control unit causes the transmitter to transmit a signal at a high transmission power by raising the transmission power of the transmitter, to thereby enable information to be read from or written to the separate device.

Included among the many structures described herein are photonic bandgap fibers designed to provide a desired dispersion spectrum. Additionally, designs for achieving wide transmission bands and lower transmission loss are also discussed. For example, in some fiber designs, smaller dimensions of high index material in the cladding and large core size provide small flat dispersion over a wide spectral range. In other examples, the thickness of the high index ring-shaped region closest to the core has sufficiently large dimensions to provide negative dispersion or zero dispersion at a desired wavelength. Additionally, low index cladding features distributed along concentric rings or circles may be used for achieving wide bandgaps.

The invention relates to a signal processing method which optimizes the bit error rate under pragmatic conditions. The signalling method is optimally matched to the radio channel, variable with time, in rapid sequence by means of linear operations. Uplink and downlink transmission sides are determined by an excess of antennae on the downlink transmission side. The estimations of the channel matrix in the one transmission direction, necessary for the matching of the transmitter, can, in the absence of common-channel distortions with the condition of channel reciprocity, be directly obtained from the estimations for the other transmission direction. By a suitable linear combination of the transmission signals and, optionally, also the received signals, an error-free bi-directional transmission of data streams can be achieved in Rayleigh and Rice channels with significantly lower transmission powers than in purely receiver-side linear signal processing.

The embodiment of the invention relates to the technical field of wireless communication, particularly relates to a pilot signal transmission method, a signal measuring method, a signal measuring system, a piece of pilot signal transmission equipment and a piece of signal measuring equipment, and aims to solve the problem that each antenna unit transmits one pilot signal to result in very low transmission power of each antenna unit, and user equipment is high in complexity when the number of the antenna units is large in the prior art. The pilot signal transmission method of the embodiment of the invention comprises the step in which network side equipment sends determined CSI feedback configurations to user equipment, wherein one CSI feedback configuration corresponds to one CSI-RS resource, and a pilot signal corresponding to each port of one CSI-RS resource is sent through a set of antenna units corresponding to the port. By adopting the scheme provided by the embodiment of the invention, the transmission power of the antenna units can be increased to enable the user equipment to carry out signal measurement correctly, the performance of data transmission is improved, and the complexity of the user equipment is reduced when the number of the antenna units is large.

The invention provides a transparent thermal insulation anti-ultraviolet coating and a preparation method thereof, belongs to the technical field chemical industry, materials and environmental protection and relates to the transparent thermal insulation anti-ultraviolet coating which can reduce the transmission of solar energy and ultraviolet and the preparation method thereof. The coating comprises nano-slurry with the thermal insulation anti-ultraviolet function and a film-forming substance, and is combined with the synergistic effects of a wetting dispersant and a hyper-dispersant for preparing the nano-slurry with high solid content and stable dispersion. The preparation process of the coating is simple and can greatly improve the solid content of the coating, ensure the optical effect of a paint film after coating, simultaneously organically combined powder with different functions and obtain the thermal insulation anti-ultraviolet functional coating with satisfactory effects. The coating has the characteristics of low transmission of ultraviolet and near infrared light of solar rays, high transmission of visible light and the like, and can be coated on glass, polycarbonate or organic glass and other transparent materials, and achieve the purposes of energy conservation and protection.

The invention relates to a double-layer assembly line with the interval adjustable. An upper layer adjustable assembly line of the double-layer assembly line with the interval adjustable is installed on a lower layer adjustable assembly line. When an adjusting screw rod is rotated, two upper belt mounting plates can move outwards or inwards simultaneously under the action of synchronizing wheels, meanwhile, under the action of four connecting frames, lower belt mounting plates can be driven to move outwards or inwards simultaneously under the action of lower sliders, thus, the distance between upper transmission belt wheels and lower transmission belt wheels can be adjusted simultaneously to adapt to carriers with various widths, three carrier lifting mechanisms and three carrier stopping mechanisms are installed on an upper plate of the upper layer adjustable assembly line, the carriers are jacked and positioned by the carrier lifting mechanisms after being stopped, and then each carrier can act in a corresponding station and flow to the next station after the action is completed; lifting air cylinders are installed on a lower plate of the lower layer adjustable assembly line, and stop dogs are connected to the lifting air cylinders. The double-layer assembly line with the interval adjustable is used for transporting product carriers, the carriers can stop in any position of the assembly line for machining, and thus the double-layer assembly line with the interval adjustable can adapt to different products.

A Personal Locator Beacon (PLB), supporting two operation modes local monitoring and remote monitoring. The apparatus includes a PLB that supports the present operation mode, as well as a local monitoring mode, employing the same transmitter, and automatically switching between modes. Upon activation, the PLB first tries to communicate with a local monitoring station, at a low transmission power, and at a high repetition rate, in purpose of dealing with the PLB call locally, without involving the remote monitoring station. Then, if not acknowledged by a local monitoring station, the PLB increases its transmission power, enabling access to a remote monitoring station. In a preferred embodiment, the PLB is carried by a person onboard a vessel, to alarm upon a Man Overboard (MOB) accident, the local monitoring station is installed onboard the same vessel, and the remote monitoring station is part of a satellite Search and Rescue (SAR) system, as Cospas-Sarsat.

In an environment in which a macro base station and a low transmission power base station exist, the ratio of the interference reduction time period of the macro base station is optimized, and the throughput of the low transmission power base station is improved, while minimizing a reduction in throughput. The macro base station causes a high interference to other base stations and one or a plurality of low power nodes (LPN) subjected to interference from the macro base station. The macro base station sets first and second data transmission time periods and then determines the ratio of the second time period and the pattern of the first time period and the second time period based on communication quality in the first time period and communication quality in the second time period of the macro base station and the LPN.

The present invention relates to methods and apparatuses for transmitting data in a multicarrier telecommunication system and in particular for performing modulation and coding for low transmission power data. Scheduling information indicating resources on which a terminal is scheduled to transmit data is received at the terminal. The scheduling information includes a modulation and coding indicator set. Data are transmitted on the scheduled resources in accordance with a modulation and coding indicator in the modulation and coding indicator set and with a transmission parameter of the data to be transmitted.

In a passive optical network system, in order that by measuring a transmission distance and a transmission time between an OLT and an ONU in operation of the system, if the distance or the time is short, communication is conducted at a high transmission speed to increase a capacity of user; if the distance or the time is long, communication is conducted at a low transmission speed to increase the capacity of user communicating in a state in which a predetermined quality is secured, a main station includes a signal communication circuit to communicate with subsidiary stations at a first or second transmission speed and a controller to measure a transmission distance or a transmission time between the main station and each subsidiary station. Based on a result of the measurement, the controller selects a transmission speed for communication with the subsidiary station.

An optical waveguide comprising cladding 1 and core segment 20 buried in cladding 1 and serving as a waveguide, wherein a combination of glass material constituting the core segment 20 and another glass material constituting the cladding 1 is so selected that an absolute value of difference in coefficient of thermal expansion between these materials (α1-α2) is within a range of 0 and 9×10−7° C., where α1 denotes a coefficient of thermal expansion of the former material and α2 denotes that of the latter material. Since this makes possible to bond directly the glass materials having different refraction factors and different coefficients of thermal expansion, and to produce the optical waveguide at even a lower temperature as compared to the prior art method as an upper cladding layer is formed with the sputtering method, it realizes reduction in number of processes and time of manufacture, thereby providing the optical waveguide of low transmission loss at low cost, as well as a method of manufacturing the same.

Included among the many structures described herein are photonic bandgap fibers designed to provide a desired dispersion spectrum. Additionally, designs for achieving wide transmission bands and lower transmission loss are also discussed. For example, in some fiber designs, smaller dimensions of high index material in the cladding and large core size provide small flat dispersion over a wide spectral range. In other examples, the thickness of the high index ring-shaped region closest to the core has sufficiently large dimensions to provide negative dispersion or zero dispersion at a desired wavelength. Additionally, low index cladding features distributed along concentric rings or circles may be used for achieving wide bandgaps.

An optical transponder includes a mapping unit mapping, out of multiple types of signals including a first client signal and a second client signal that transmission rates are different from each other, the first client signal having a lower transmission rate to a Generic Framing Procedure (GFP) frame defined in ITU-T Recommendations; a coding unit applying 64B / 66B coding to the first client signal mapped to the GFP frame; and a multiplexing unit multiplexing the first client signal to which the 64B / 66B coding has been applied and the second client signal in a frame conforming to an Optical Transport Network (OTN) defined in ITU-T Recommendations; in which the first client signal and the second client signal are accommodated in an identical frame in a mixed manner and transmitted as an optical signal having one wavelength.

A position sensor encodes absolute position via n consecutive members of a pseudorandom sequence of bits, where each bit (30a-30k) comprises a region of high transmission or reflectivity adjacent to a region of low transmission or reflectivity. The pseudorandom sequence is chosen such that every series of n consecutive bits (30a-30k) in the sequence is predominantly formed from a predetermined bit value (1 or 0). The light transmitted or reflected from the series is therefore detected as a substantially periodic intensity pattern (42), which can be processed via Fourier analysis to yield an accurate interpolation of relative position. An example is given of a pseudorandom sequence, which can be represented as a cyclic Manchester code, in which at least 8 members of every series of 11 consecutive bits has a bit value of 1.

The present invention discloses a method and system for enabling efficient reduction of TFCs in the TFCS to achieve desired transmission, while remaining within desired power and data requirements. Upon the UE transmission power requirement exceeding the maximum or allowable transmission power the MAC shall be informed for subsequent TFC selection of all TFCs that currently exceed this limit. The UE will then chose the TFC with the next lower transmission power requirement and the sequence will continue until an acceptable TFC is determined. The present invention also enables the replacement of the TFCs in the TFCS and advanced determination of non-supported TFCs. The TFCs that require transmission power greater then the maximum or allowed UE transmission power shall be determined continuously in every TTI, not just in TTIs where the maximum power has been exceeded.

A filter-balun combination for filtering an RF input signal and balancing output RF signals is provided. The filter-balun combination is formed in a multi-layer planar substrate having multiple dielectric layers and multiple planar device layers having conducting material. The filter section includes first and second symmetrical inductors formed in the substrate. The inductors provide filtering for an input signal. The balun section includes a balun central transmission line connected to an output of the filter, and two output structures for providing the output from the filter-balun combination. The central transmission line follows a path through the substrate that includes first and second coil areas. The input line is sandwiched between upper and lower transmission lines in the first and second coil areas. The output of the filter-balun combination is a filtered, balanced signal at each of the two balun output structures.

Whitespace devices can use unused television frequencies for transmission and reception of WiFi OFDM signals. Three contiguous bands, such as former channels 2, 3, and 4, may be bonded together to define a whitespace band. In order to fit a WiFi OFDM signal into this whitespace band, a whitespace device compresses the bandwidth of each WiFi OFDM signal using a specific spectrum mask. Very low transmission power is needed for the modified WiFi OFDM signals, eliminating the need for high power amplifiers and most of the WiFi OFDM designs such as PHY and MAC can be reused with minor modifications.

The invention relates to a sub-wavelength wire-grid polarizer, belongs to an optical polarizer, and in particular relates to a wire-grid polarizer. The polarizer aims to solve the problems that the prior wire-grid polarizer is low in transmission and extinction ratio. A wire stripe grid is arranged on a substrate; the surface of the wire stripe grid is provided with a protective layer; an interface of the substrate connected with the wire stripe grid is provided with a multi-layer dielectric film, and the other interface of the substrate is provided with a multi-layer dielectric anti-reflection film; and the multi-layer dielectric film is one of an anti-reflection film, a reflection film and a band pass filter film. Corresponding optical thin films are arranged on an incident light interface and an emergent light interface, so that the polarizer greatly improves the transmission and the polarization extinction ratio and solves the problems of low transmission and polarization extinction ratio in the prior polarizer; the polarizer can be separately used as an optical polarizer or an optical analyzer, and also can be used as a laser output coupling mirror, wherein the output of the laser is linearly polarized light with tunable wavelength. Moreover, the polarizer can be used in the fields such as optical measurement, optical communication, laser and the like.

A transmission method and apparatus which perform communication without interfering with other types of communication is provided. A transmission symbol stream is generated by applying predetermined modulation processing to an encoded bit series obtained by encoding an information bit series of a predetermined transmission rate. A transmission signal generated by applying the transmission processing to the transmission symbol series is then transmitted. A transmission-information bit series with a transmission rate lower than the predetermined transmission rate is generated first. Transmission of the transmission signal generated in accordance with the transmission-information bit series then begins through a predetermine communication channel. The low transmission rate is then sequentially stepwise increased to the predetermined transmission rate. Transmission is performed while sequentially stepwise increasing the number of communication channels in accordance with the sequential stepwise increase of the low transmission rate.

A facility stores attachments for electronic mail messages so that the messages may be transmitted to the intended recipients without the attachments. The recipients may then review and / or download the attachments by contacting the facility. This facility is especially useful in instances wherein the attachments are large. The facility eliminates the need to store multiple copies of the attachment throughout a system; thus consuming a great deal of memory space. In addition, the facility prevents the recipient from extensive delays that are often associated with downloading email messages that contain large attachments via a dial-up connection with a low transmission rate. The facility may be realized as a server and may be a web server so as to provide access to the attachments via an IP network.