76results about How to "Improve effective throughput" patented technology

An apparatus, such as a base station, transmitting signaling information in a cellular communication system whereby a plurality of shared uplink transmission resources is divided into sets of mutually exclusive transmission resources. The apparatus comprises means for granting uplink resources to a wireless subscriber communication unit via a grant message for uplink transmission; means for receiving an uplink transmission from a wireless subscriber communication unit; means for deriving an uplink code resource identifier from the uplink transmission or the grant message; means for assigning at least one downlink code sequence used to carry downlink signaling information associated with the uplink transmission and which is derived using the uplink code resource identifier; and means for transmitting a downlink transmission comprising the at least one downlink code sequence to the wireless subscriber communication unit.

Methods and apparatus are provided for the efficient use of cognitive radios in the performance of dynamic spectrum access. This includes spectrum sensing algorithms, adaptive optimized sensing of parameters based on changing radio environments, and identifying vacant channels. Protocols for switching communication links to different channels, and synchronizing communicating nodes in order to maintain reliable connectively while maximizing spectrum usage are also provided.

A method, apparatus, and system for setting an uplink transmission rate limit for a mobile terminal operating in a mobile communications network in which the mobile terminal receives downlink transmissions over a high speed downlink shared channel. The mobile terminal measures a downlink channel quality (CQI), and sends the CQI to the network. The network utilizes the measured CQI to determine an uplink data transmission rate limit for the mobile terminal.

An approach for controlling bandwidth allocations for a switching system with transmission constraints is disclosed. A scheduler within a switching system generates bandwidth metrics for a destination site. A traffic control processing logic receives the bandwidth metrics. The traffic control processing logic includes a utilization module that determines utilization associated with the destination site based upon the received bandwidth metrics, and an error calculation module that computes the difference between the determined utilization and a target utilization. A gain and filtering module, which is also a part of the traffic control processing logic, computes a correction value based upon the difference between the determined utilization and the target utilization, in which the correction value being associated with the destination site. Further, the traffic control processing logic includes an adder that outputs a control value based upon a reference control value and the correction value. A bandwidth control processor assigns bandwidth allocation based upon the control value.

This power and safety control hub for overall power control, safety control and power distribution integrates fault tolerant power disconnect control, software monitoring of disconnect and multi-voltage power distribution and disconnect with non-hazardous power control, EMI filtering and multi-circuit current protection in a single unit. In addition, it implements electromagnetic, single fault tolerant, safety control circuits without using positively driven contact relays. It coordinates the shutdown of any connected mechanical drives such as servo motor drives, stepper motor drives and variable speed drives autonomously commanding them to come to a controlled stop before safety power is disconnected (when networked controls are used). It also integrates segmented hazardous power control (load/unload and main machine/equipment areas) so that the main area can be operating while the load/unload area has power disconnected. Further, it automatically discharges energy sources within connected mechanical drives at the time of safety power disconnect of hazardous power. It also utilizes a safety control and monitoring algorithm that automatically forces the test on e-stop switches and interlocks in a machine each time the machine is powered up or reset. In addition, it has a state driven safety control and monitoring algorithm that pinpoints wiring and device problems for rapid debug. It includes internal self-protection that automatically forces a control safety power disconnect (after warning the host) if the unit should approach its maximum operating temperature, or if a cooling fan stops. Further, it incorporates safety monitoring software for the synchronous de-bouncing of the interlock and e-stop switch inputs (as a vector) to eliminate false trips. It also integrates a comprehensive audible overcurrent trip indicator as well as individual visual overcurrent indicators in the power distribution system and an e-stop reset function into the machine on-off front panel switch. Finally, our power and safety control hub for overall power control, safety control and power distribution includes a “soft-off” circuit that automatically shuts off the machine when the power supply voltage to a host computer is shut down.

Each node includes a node controller for decoding the control information and the address information for the access request issued by a processor or an I/O device, generating, based on the result of decoding, the cache coherence control information indicating whether the cache coherence control is required or not, the node information and the unit information for the transfer destination, and adding these information to the access request. An intra-node connection circuit for connecting the units in the node controller holds the cache coherence control information, the node information and the unit information added to the access request. When the cache coherence control information indicates that the cache coherence control is not required and the node information indicates the local node, then the intra-node connection circuit transfers the access request not to the inter-node connection circuit inter-connecting the node but directly to the unit designated by the unit information.

The invention discloses a method which is used for checking and reporting a protocol data unit in the control of wireless link. The receiving terminal checks whether a PDU losses packages by applying an HARQ flutter timer. When the PDU losses packages, and a timer with one period is adopted, the report of losing packages state is sent to the sending terminal. The invention also discloses a check and report system and a receiving terminal of the protocol data unit that is lost in the control of wireless link. The invention can start one HARQ flutter timer to a plurality of receiver sequence gaps when loss lists are checked. Or else the invention sends loss state report by a period timer until the loss list is empty. By applying the invention, the cost of the timer in the system can be reduced, meanwhile, times of sending loss state report can be reduced, thus lowering the occupancy factor of wireless resource used by loss state report, and the effective thuoughput of the system is correspondingly improved.

Effective throughput is enhanced by minimizing a transmission amount of modulation information per frame.

A storage part storing information indicating an adaptive modulation level of a modulation parameter, a difference information output part that generates difference information with one bit indicating a difference between the adaptive modulation level of a modulation parameter used for adaptive modulation in a previous frame and that of a modulation parameter used for adaptive modulation in a current frame, and a frame generation part generating a frame using the difference information as modulation information to notify a receiving side of the modulation parameter used for adaptive modulation of a subcarrier or subcarrier group in the current frame, are provided.

The invention discloses a power distribution method based on MIMO-NOMA short packet transmission. According to the method, a short packet transmission related theory is adopted for the first time, andthe remote user communication quality in the MIMO-NOMA system is analyzed; and on the premise of ensuring the communication quality of the near users, the sending power and the maximum reachable transmission rate of the users in the cluster are jointly optimized by utilizing an alternating iterative algorithm, and finally, the power distribution method capable of realizing the maximization of thethroughput of the far users is obtained.

The invention relates to a transmission control method of the multimedia data, in particular to a congestion control method based on the jitter measurement in the metro Ethernet network. The method utilizes the priority bit position of the C-VLAN Tag of the Q-in-Q the metro Ethernet network as the counter of the node time delay jitter. The accumulated time delay jitter of the multimedia data frame in the transmission process from end to end is followed. The data of the small jitter corresponds to the higher priority and the data of the higher jitter corresponds to the lower priority. The Ethernet data frame, the jitter value of which is larger than the user tolerate threshold value, is lost by the determination of the user tolerate threshold value. The invention can effectively reduce the average time delay jitter of the multimedia flow, which can improve the good throughput of the multimedia service and the service quality of the multimedia service.

The invention relates to a wireless communication field and discloses a communication method based on MIMO and a system thereof. The invention can promotes the performance of an MIMO system under the condition of limited CSI feedback. Region to which CSI of a receiver belongs currently is notified to a sender and according to a preset, the sender uses a modulation coding proposal, a mode selection and a pre-coder corresponding to the region for transmitting the data. The sender notifies the receiver about frame numbers which starts to feed back, quantity of the feeding back frames and series number of sub-channels which need to be fed back through a request message; according to parameters in the request messaged, the receiver feeds back the series number of the sub-channels and information about the region where the CSI of the sub-channel belongs through a response message.

A relay terminal for relaying communication signals from originator user terminals to destination user terminals stores relay-authorization-and-priority data for a plurality of user terminals having respective identification codes; detects the identification codes in communication signals sent from a plurality of originator terminals; processes the detected identification codes in combination with the stored data to determine if immediate relaying of the received communication signals to respective identified destination terminals is authorized; and relays the received communication signals immediately to only those of the identified destination terminals to which immediate relaying is so authorized. Directional-position data associated with a given originator terminal derived by processing portions of a signal received from such originator terminal is processed to form a beam path for communications with the given originator terminal.

The invention relates to the field of industrial wireless network technology, in particular to an industrial wireless network frequency-domain polling method based on an OFDM technology. The method includes that AP distributes a polling group ID and a subcarrier ID for new nodes added in the network; the AP sends a polling request pocket and utilizes OFDM subcarrier in the frequency field to response after the nodes receive the polling request pocket; the AP distributes TDMA time slots to the nodes required to transmit data according to response situation of each polled node; the nodes transmit data in corresponding time slots after receives the TDMA time slot distributed results. The method is provided on the premise of considering industrial wireless network application features fully, can reduce network protocol overhead and increases bandwidth utilization and effective network throughput, and accordingly improves real time and scale of the network.

The invention relates to a method for a node to access multiple channels exactly and efficiently in an underwater cognitive network. The method comprises the steps of performing spectrum prediction by utilizing a spectrum sensing result and obtaining state information of each channel after the spectrum sensing; performing optimized allocation based on the current state information of each channel and each channel bandwidth as the optimization goal of spectrum allocation is the maximum channel gain, and the spectrum allocation emphasizes on considering maximization of a channel capacity; dividing multiple time slots in order to avoid long propagation delay of a sound signal and save energy, wherein each control packet and each data packet only can be sent at the start moment of one time slot; and transmitting data by adopting a message string mode, wherein each data transmitting node is required to transmit the data at the start moment of the time slot with the serial number being integer multiples of 4 after the channel allocation is ended. According to the method for the node to access multiple channels exactly and efficiently in the underwater cognitive network, effective throughput of an underwater network system is increased, and efficient transmission of communication data is realized.

The invention relates to a multipath congestion control method and device based on time delay and window jitter. The multi-path congestion control method based on time delay and window jitter comprises the following steps: obtaining a characteristic value R (k) of current network delay jitter according to a product of a difference value between data round-trip time delay and a data round-trip timedelay average value on a current transmission path and a first weight value; obtaining the average value of the size of the congestion window on the current transmission path and the sizes of the previous n congestion windows, and obtaining the characteristic value w (k) of the jitter of the current congestion window according to the product of the difference value between the congestion window value and the average value of the previous n congestion windows and the second weight value; determining the current packet loss type on the data transmission path by using the result of the sum of R(k) and w (k); and adjusting a congestion window corresponding to the data sending path according to the packet loss type. According to the multi-path congestion control method based on the time delayand the window jitter, the effective throughput of the MPTCP of the mobile terminal is improved.

An apparatus for transmitting and receiving signals in a wireless telecommunication system and to a method for transmitting random access bursts in such an apparatus. The apparatus includes a transmitter for transmitting random access bursts, a receiver for receiving acknowledgement information confirming a successful transmission of a random access burst, a decision unit for deciding if acknowledgement information has been received, and a control unit for randomly choosing a time point for an attempt to retransmit said random access burst from an interval if no acknowledgement information has been received after a random access burst had been transmitted.

The invention provides a status feedback method of an AM mode, which is used for determining whether received data packages are received in a correct order, and if a receiving sequence nick exists, the method finishes the final feedback of receiving status after further detecting the receiving sequence nick. The invention simultaneously provides a status feedback system of the AM mode, which comprises a sending end and a receiving end, and the receiving end comprises a decision unit and a detection unit; wherein, the decision unit is used for determining whether the received data packages are received in a correct order and triggering the detection unit if a receiving sequence nick exists; the detection unit is used for detecting the receiving sequence nick and finishing the final feedback of receiving status. The invention can lead the receiving status feedback of RLC to be more accurate, avoid unnecessary retransmission and consequently save system cost.

The invention belongs to the technical field of radio-frequency spectrum sensing, and particularly relates to a parallel cooperation spectrum sensing method based on the genetic algorithm. The parallel cooperation spectrum sensing method includes the steps of generating an initial group, conducting individual amendment, calculating a fitness function, selecting an individual with the highest adaptability, conducting variation, struggling for existence, conducting winner intersecting, generating individuals at random, conducting individual amendment, enabling the most adaptable individual to directly enter a next generation, and stopping. By means of the parallel cooperation spectrum sensing method, the differences of different sensing users on different kinds of heterogeneous channel sensing performance, the system effective throughput and the sensing time can be sufficiently considered, and the optimal sensing strategy, namely the sensing task distribution and the sensing time length, is determined. Compared with a random sensing method, the larger system effective throughput can be obtained.