136results about How to "Avoid transmission delays" patented technology

A medium access control (MAC) technique of a multihop sensor network. In the multihop sensor network, the MAC technique may contribute to significantly reducing transmission delay, and allow real-time services to be provided to all nodes by extending a guaranteed time slot (GTS) restricted to one hop in a personal area network (PAN) coordinator (PNC) to all nodes. Furthermore, the MAC technique may allow the number of available GTSs to be significantly increased, by using all 16 frequency band channels instead of using only a single frequency band and setting a multi-superframe.

The efficiency of transmitting lower priority data traffic along with higher priority traffic is improved by segmenting a data packet in such a way so as to reduce transmission delay of the higher priority traffic. The data packet is segmented so that all its segments, including the last segment, are approximately the same size. The segment size is set smaller than a maximum permitted segment size. Indeed, it is desirable (though not necessary) to set the segment size as small as design parameters, (e.g., minimize segment header overhead), allow in order to reduce transmission delay of the higher priority traffic. Because the last segment is set at the same size or a larger size than the other segments, delay in transmitting the data packet is also reduced. The last segment may be sized as large as practical to minimize the transmission delay of the data packet. Once segmented, the data packet segments are transmitted along with the higher priority traffic.

A method for improving Discontinuous Reception (DRX) Functionality in a user equipment (UE) of a wireless communication system is disclosed. The method includes steps of receiving a Radio Resource Control (RRC) message, which contains a DRX Configuration Information Element (IE drx-Configuration), activating a DRX functionality according to the IE drx-Configuration, and starting monitor a Physical Downlink Control Channel (PDCCH) until a PDCCH signaling addressed to the UE is received.

The invention discloses a method for controlling channel access of a wireless sensor network. A base station node and each sensor node adopt a time frame structure with different lengths of time frame, so that the sensor nodes can reserve different time slots by dispatching to carry out data packet transmission, thereby not only reducing collision probability of forwarding data packets among sensor nodes in a high-density monitoring area and improving the utilization rate of wireless channel, but also effectively avoiding overhearing in the wireless sensor network and frequent status switching of a transceiver; therefore, the sensor nodes can be in dormancy status as fully as possible during idle transmission so as to greatly reduce energy consumption under the high-loading network condition and have good energy efficiency. A path reserve mechanism can reserve a multi-hop time slot in advance along data packet forwarding direction in time slot reservation phase, according to the time frame synchronizing characteristics of the sensor nodes on a forwarding path, thereby effectively avoiding end-to-end transmission delay of single data packet caused by intermittent transmission of data packets on the forwarding path.

A radio resource allocation method for use in a radio telecommunication system for a first radio telecommunication apparatus and a second telecommunication apparatus carrying out a radio telecommunication by using an allocated radio resource, comprising selecting a resource allocation pattern identifying a combination of radio resources allocatable within a resource management space from among a pre-prepared plurality of resource allocation patterns, and notifying the second radio telecommunication apparatus of pattern identifier information identifying the selected resource allocation pattern and of startup position information thereof within the resource management space.

A method, apparatus and system for integrated circuit testing, wherein a plural number of devices under test (DUTs) and a plural number of comparison apparatuses are placed on a common substrate. The DUTs all operate under the same input stimulation and each produce its own operation output. The outputs are compared by the comparison apparatuses to generate comparison characteristics which are used to filter-out the failed devices. This invention lowers the testing cost, shortens time to product mass-production, and lowers the miss rate of failed devices passed as good ones.

The invention belongs to the technical field of a fog computing network, and particularly relates to a cloud/fog hybrid network architecture based on an SDN. The cloud/fog hybrid network architecture comprises an infrastructure layer, a fog computing layer, an SDN control layer and a cloud computing layer, wherein the infrastructure layer is used for sending a request of a user terminal and detection data of a medical device to the fog computing layer; the fog computing layer is connected with the infrastructure layer via an unshielded category 5e twisted pair, and is used for receiving and storing medical data uploaded by the user terminal, downloading an analysis result on a cloud server in an active caching manner, processing the medical data uploaded by a client according to the downloaded analysis result, and uploading the medical data to the cloud computing layer; the SDN control layer is connected with the fog computing layer via the unshielded category 5e twisted pair, and is used for controlling data forwarding of the fog computing layer; and the cloud computing layer is connected with the SDN control layer via an optical fiber, and is used for storing the collected medical data, carrying out analysis on the medical data, and processing the medical data received by the fog computing layer cooperatively with the fog computing layer.

A method for transmitting control information in uplink from a mobile terminal to a base station in a wireless mobile communication system is provided. In the method, when no data to be transmitted to the base station is present in the mobile terminal, Scheduling Request (SR) information and Channel Quality Indicator (CQI) information having a predetermined size or greater are multiplexed together and the multiplexed information is transmitted to the base station through a Physical Uplink Shared CHannel (PUSCH). This method prevents waste of uplink transmission resources while avoiding uplink data transmission delay.

A torque balancing device applied to synchronous dual-shaft system for making the rotary shafts bear the same torque or pressure and avoiding slippage thereof. The torque balancing device includes a first rotary shaft, a second rotary shaft and a torque balancing unit. Each of the first and second rotary shafts has a fixed section mounted on an electronic apparatus and a drive section assembled with the torque balancing unit. The torque balancing unit includes a reactor and a responder assembled with each other. Each of the reactor and the responder has wing sections for together holding the drive sections of the first and second rotary shafts in normal state. When the first and second rotary shafts rotate, the wing sections are elastically forcedly biased and opened and the reactor and the responder are moved in an axial direction relative to each other.

A stateful packet filter and a table management method thereof The stateful packet filter includes an index buffer storing a session table index address from a session table, which is searched for determining a session of a received packet when a packet is received; and a table manager updating a state table by using the session table index address, stored in the index buffer, as a state table address value.

The invention discloses a reference signal and multiple access resource mapping method comprising the steps that a reference signal used for uplink data transmission is determined; multiple access resources are determined according to the mapping relation between the reference signal and the multiple access resources; and communication is performed by using the multiple access resources. The mapping method can also be applied to a scheduling-free system. The root sequence index, the cyclic shift, the OCC index and the COMB index of the reference signal used for uplink data transmission can be mapped out by the leader sequence through the set rules according to the selected leader sequence, and then the multiple access resources can be mapped out according to the mapping method. The invention also discloses reference signal and multiple access resource mapping equipment. The signaling overhead can be reduced by applying the technical scheme.

A transmission delay caused by a Bandwidth Request (BR) of a Mobile Station (MS) in a broadband wireless communication system can be avoided. An operation of the MS includes performing an initial BR to allocate resources across a plurality of frames. When a resource is allocated according to the initial BR, an adaptive BR is performed on the resource in a piggyback manner by using the resource while transmitting an acknowledge (ACK) message corresponding downlink Transmission Control Protocol (TCP) data.

Disclosed is a method for preventing transmission delay occurring when transmitting packet data to a destination in a transmission module including a first memory having a first memory area for storing packet data to be transmitted and a second memory area for backing up the first memory area, a second memory connected to a transmission link, and a frame processor. The method comprises storing a copy of the packet data stored in the second memory area according to a state of the second memory; deleting the packet data stored in the second memory area if copy of the packet data stored in the second memory is transmitted; determining whether packet data combining is possible according to a state of the second memory area; and if the packet data combining is possible, combining the packet data stored in the first memory area with the packet data stored in the second memory area and storing the combined packet data in the second memory.

The embodiment of the invention relates to a retransmission method and a retransmission device of a data package, wherein the retransmission method of the data package comprises the following steps of: transmitting a data package by using a transmitting end; when the transmitting end confirms that the data package is completely transmitted, and a data package to be transmitted does not exist or a transmitting window can not transmit data package to be transmitted, indicating a media access control entity by using the transmitting end to feedback that whether the transmission of the data package is failed in a local negative answer mode; and if the transmitting end receives a condition that the media access control entity feedbacks that the transmission of the data package is failed in the local negative answer mode, and retransmitting the data package using the transmitting end. According to the retransmission method and the retransmission device of the data package, when the data package is completely transmitted, and the data package to be transmitted does not exist or the transmitting window can not be transmit data package to be transmitted, the local negative answer mode is applied to the data package, so that transmission delay and repeated retransmission of the data package can be avoided.

The invention provides a multi-screen interaction system applied to automobiles. The multi-screen interaction system applied to automobiles comprises a center control main machine and an instrument main machine; the center control main machine is connected with the instrument main machine; the center control main machine comprises a center control display screen; the instrument main machine comprises an instrument display screen; and the center control main machine transmits content which needs to be projected on a screen to display to the instrument main machine to display according to the requirement of a user. The requirement of the user comprises judging whether the user needs to perform projection screen operation or not according to operation on an application icon on the center control display screen by the user or operation on the application icon by the user through voice, according to an operation trajectory formed by the operation of the user and through combination with a preset rule. The center control main machine can project the content needing to be displayed on the instrument display screen to display, so that operation of a driver in the driving process is facilitated, the driving safety can be improved, and safety accidents in front of the vehicle caused by that the driver is distracted or absent-minded are avoided.

A handover-source base station transfers a data packet destined to a mobile device received from a base station control device to a handover-destination base station as an inter-base-station transfer packet during a stopping period for which the handover-source base station stops a wireless transmission of a data packet to the mobile device. The handover-destination base station calculates a wireless transmission priority for the inter-base-station transfer packet based on a station retention time in the handover-destination base station and an estimated value of a retention time in the handover-source base station.

A solid-state imaging device capable of reducing an eclipse (blocking) of an incident light at a circumferential portion of a light receiving portion and realizing a larger angle of view and high-speed driving. A single-layer transfer electrode configuration of forming first transfer electrodes and second transfer electrodes by one polysilicon layer is adopted. Two shunt wirings extending in a horizontal direction are formed on the first transfer electrodes connected in a horizontal direction and, for example, four-phase transfer pulses are supplied to first transfer electrodes and second transfer electrodes on transfer channels through low-resistance shunt wirings extending in the horizontal direction.

The invention discloses a method and a system for obtaining a transmission delay between access technology networks. The method comprises the following steps that a terminal receives a data packet which is transmitted by a second access technology network and is from a first access technology network, and obtains first time information for adding the data packet into the first access technology network from the received data packet; and the terminal computes transmission delay information of the data packet according to the obtained first time information and second time information of the first access technology network when the terminal receives the data packet. According to the method and the system, the transmission delay between the access technology networks can be known to provide the technical support for preventing the transmission delay problem and the queuing phenomenon of the data unit.

A wireless sensor network system includes: sensor terminals and a management terminal. A sensor terminal sends a join request at a first transmission power; and the management terminal calculates the traffic load of nodes on the reception path of the join request. If the number of hops and the traffic load are both within respective permissible ranges, the management terminal sets the reception path as the communication route of the sensor terminal. If the number of hops and/or the load is not within the permissible rage, the management terminal reconstructs the communication path by outputting an instruction to the sensor terminal to make direct connection to the management terminal or a specified node with a low traffic load, at a second transmission power greater than the first transmission power. When receiving the instruction, the sensor terminal transmits to the management terminal or the specified node at the second transmission power.

The invention provides an activation control method, a user terminal and a network side device. The method comprises steps: configuration information sent by the network side device is received, wherein the configuration information is used to indicate at least one of a transmission resource and an operation attribute; and if the transmission resource and/or the operation attribute are configuredfor a target object, a deactivating function operation is performed on a target object, wherein the target object is a cell, a carrier, or a bandwidth part (BWP). As the deactivating function performed by the cell, the carrier or the BWP can be controlled according to the transmission resource, PDCCH loss can thus be effectively avoided, and the problem that a wrong deactivating operation is triggered when the cell, carrier or BWP deactivating is timeout and uplink transmission of a user terminal is caused to delay can thus be effectively avoided.