699 results about "Packet reception" patented technology

A system for and method of analyzing the performance of a packet-switched network, the network automatically generating a traffic log each time a packet enters or exits the network and each traffic log including at least the time the traffic log was created, the addresses of the packet sender and packet recipient, and the entry and exit network nodes. A server collects a plurality of traffic logs, parses the available information therein and generates a plurality of histograms, each histogram being based on information gleaned from the plurality of traffic logs. The histograms may be representative of packet traffic passing through a host connected to the network, packet traffic passing through a node in the network or the amount of data that travels over a link between two nodes of the network. To increase the delivery speed of the histogram data from the server to a client, the histograms are preferably stored as flat files to achieve direct and rapid access to stored data.

In a packet retransmitting system for retransmitting a packet including a sequence number in a packet header, which is lost during packet communication, a transmitting equipment (110) includes a priority degree information attaching unit (113) for defining a plurality of priority degrees, setting an importance degree of each of the plurality of priority degrees for a packet, producing priority degree information by using the plurality of priority degrees, and attaching the priority degree information to the packet header included in the packet repeatedly for each of the plurality of packets, a transmitter (111) for transmitting the plurality of packets, and a retransmitting unit (119) for receiving a retransmission request packet and retransmitting a packet of which retransmission is requested in the retransmission request packet received. A receiving equipment (130) includes a receiving unit (131) for receiving the plurality of packets and a retransmission requesting unit (133) for extracting a plurality of sequence numbers and a plurality of priority degree information from the packet header, detecting lost packets based on the plurality of sequence numbers and the plurality of priority degree information extracted, detecting an important packet among the lost packets, and requesting retransmission of the packet.

A packets sending/receiving apparatus, comprising: authentication and key exchange means; encryption means for producing an encryption sending data; sending condition setting management means for producing sending condition setting information for setting sending condition of the sending packets; packetization means for producing the sending packets using the encryption sending data; receiving condition setting management means for producing receiving condition setting information for setting receiving condition of the receiving packets; packets reception means for receiving the reception packets; and decoding means for decoding the reception data using the decoding key.

Immediately before transmitting a packet signal, a packet transmission base station (BS1) increases a target ISR of UL DPCH (S12), increases the TPC transmission power transmitted by the DPCH (S13), increases a power balancing reference power, and increases a DL DPCH transmission power (S14). In a mobile station (MS3), during packet reception, only a packet transmission base station (1) controls the UL DPCH transmission power (S15). This improves the reception quality at the base station (1) of HS-DPCCH including ACK/NACK and reduces the error ratio of the ACK/NACK signal.

A radio communication system of an HARQ method that makes an HARQ transmission interval of subpackets appropriate and reduces data transmission delay resulting from subpacket retransmission. In the radio communication system in which a packet is transmitted and receives with the HARQ method between a base station and multiple radio mobile stations, each of the base station and the multiple radio mobile stations has: a packet transmission circuit for transmitting subpackets in predetermined intervals; a packet reception circuit for repeating decoding processing by combining a newly received subpacket and a previously received former subpacket until an original packet is successfully decoded; and a HARQ control equipped with a function of, for packet communication whose data length is short, transmitting a subpacket or response from the packet transmission circuit in an HARQ transmission interval that is shortened from the HARQ transmission interval of the normal mode.

The external device, for example, an electronic flash device, is wirelessly connectable to an information communication device, for example, a camera. The external device includes: a synchronization data creation unit that outputs synchronization data for synchronization of timing of processing related to photography; a packet creation unit that creates a communication packet including control information; and a packet output unit that outputs the communication packet to the exterior by wireless communication. The packet creation unit includes a packet reception unit that receives the communication packet; a detection unit that detects the synchronization data before all of the received communication packets received by the packet reception unit has been read in; and a signal output unit that outputs a synchronization signal used for establishing synchronization of the timing of the processing related to photography on the basis of detection by the detection unit of the synchronization data.

A congestion control network relay device capable of preventing redundant retransmission of packets which are already delivered to a receiving-side device. When an acknowledgment packet is detected by an acknowledgment packet detector, a receive packet manager stores acknowledgment information in an acknowledgment information memory. If first and second data packets are retransmitted thereafter from a transmitting-side device and input to the congestion control network relay device, a packet reception determination unit judges, for example, that the first data packet has not yet been received by the receiving-side device while the second data packet has already been received by the receiving-side device. In this case, a packet transfer unit transfers the first data packet to the receiving-side device and discards the second data packet.

A method permits an originating PTT subscriber to be able to elect to transmit a voice message that will be stored by the PTT system for a later delivery to the designated recipient. A communication application server receives the voice message via packets and upon recognizing a predetermined code stores the voice message for later delivery to the designated recipient. The server then transmits a status update message to the mobile terminals of the originating subscriber and the designated recipient causing the respective status of each to be modified with indicia indicating that a voice message from the originating subscriber awaits delivery to the designated recipient. Upon the election of the designated recipient, the stored voice message from the originating subscriber is requested to be played.

A two-way transmission system of the present invention is arranged in such a manner that, when a host-side controller confirms the receipt of an IN packet from a USB host, the host-side controller transfers the IN packet to a function-side controller, and receives a DATA packet from the function side. The received DATA packet is temporarily stored in a FIFO. At the time of the receipt of the IN packet again, the host-side controller supplies, to the USB host, the DATA packet stored in the FIFO.

Aspects of a method and system for an operating system (OS) virtualization-aware network interface card (NIC) are provided. A NIC may provide direct I/O capabilities for each of a plurality of concurrent guest operating systems (GOSs) in a host system. The NIC may comprise a GOS queue for each of the GOSs, where each GOS queue may comprise a transmit (TX) queue, a receive (RX) queue, and an event queue. The NIC may communicate data with a GOS via a corresponding TX queue and RX queue. The NIC may notify a GOS of events such as down link, up link, packet transmission, and packet reception via the corresponding event queue. The NIC may also support unicast, broadcast, and/or multicast communication between GOSs. The NIC may also validate a buffered address when the address corresponds to one of the GOSs operating in the host system.

An extended paging indicator-based adaptive discontinuous reception method is proposed so as to improve a power saving performance of a terminal in an asynchronous wideband code division multiple access schemes. To this end, a plurality of terminals for performing power saving receive an extended paging indicator for a discontinuous reception cycle, conform a type of a bit Run for configuring the extended paging indicator, and change the discontinuous reception period. In addition, the terminals set the discontinuous reception period update factor value to be varied according to the extended paging indicator as an initial value so as to determine a next paging occasion block, change the discontinuous reception period update factor value according to the paging indicator of the bit Run received from base station, and change the discontinuous reception period according to the variance of the discontinuous reception period update factor value. The extended paging indicator-based adaptive discontinuous reception method may improve transmission time delay and transmission failure probability performances for packet reception as well as a power saving performance in comparison with a conventional fixed discontinuous reception method.

The packet reception control device includes: a load detection section for detecting a load on a processor and outputting the detection result; and a reception control section for determining whether or not the processor should receive a reception packet based on the detection result output from the load detection section and outputting the determination result. The processor receives the reception packet according to the determination result output from the reception control section.

Mobile terminal 100 has: operator 251 that calculates the generation interval of ACK packets based on the size of the ACK packet that is to be transmitted and the channel rate of the transmitting channel, held in controller 250; delay ACK timer 223 that repeats counting the calculated ACK packet generation interval as one period and outputs an expiration signal every time the one period expires; and data packet receiver 221 that, every time the expiration signal is input, generates an ACK packet containing the latest reception confirmation information relating to data packets received while the expiration signal was being received, and transmits the ACK packet to transmission buffer 240 via IP section 210.

In a packet transfer apparatus for transferring packets between first and second networks, a translated network address is assigned to a first node in the first network and having a first private network address when the first packet from the first node is transferred to a second node in the second network, and said translated network address is stored in an address management circuit associated with said first and second network addresses. Thereafter, address translation for realizing an NAT function is performed on subsequent packets transferred between the first and second nodes, by a dedicated hardware circuit and reference to the address management circuit, while performing processing for receiving the packets.

A method of triggering handoff of a mobile station to a candidate BSS, for VoWLAN communication, uses a roaming controller for monitoring link qualities of the serving and candidate BSS by selective/controlled fast scanning through RSSI screening at each packet reception. Using link qualities, a list of candidate BSSs for handoff is maintained. The controller selects a candidate BSS for handoff and completes pre-authentication of the mobile station with the selected best candidate BSS. When the link quality of the of the selected candidate BSS becomes better than that of the serving BSS, handoff is triggered. Link qualities may be monitored by screening a metric other than RSSI. When no candidate BSS is found, scanning is reduced/temporarily interrupted, to conserve power. When the serving BSS link quality is above a given threshold when the mobile station is in the serving BSS center, the functions of fast scanning and pre-authentication are interrupted.

A method and system for transmitting uncompressed video over a wireless channel by inputting a frame of pixel information, partitioning spatially correlated pixels into different packets, and transmitting the packets separately over a wireless channel. For robust transmission, error detection data can be generated for each packet and appended to each packet before transmission. A receiver receives the transmitted packets and checks if a received packet is corrupt based on the appended error detection data. For a corrupt packet, the receiver corrects the corrupt pixels using pixel information in other received packets containing neighboring pixels to recover each corrupt pixel in the corrupt packet.

A digital data system comprises a plurality of links for passing messages between nodes, which may be end points such as memory or processing units, or intermediate or branch points such as routers or other devices in the system. A link level flow control is implemented by control symbols passed between adjacent nodes on a link to efficiently regulate message burden on the link. The control symbols may be embedded within in a message packet to quickly effect control on a link—such as reducing data flow, requesting retransmission of corrupted data, or other intervention—without disruption of the ongoing packet reception. A control symbol may be recognized within the packet by a flag bit, a marker such as a transition in a signal, or a combination of characteristics. The control symbol may be a short word, having a control action identifier code at defined bit positions to indicate the desired link-level control function. A node receiving the control symbol implements the designated control action while maintaining packet order data (such a bit positions and byte counts), and applying message housekeeping processing (such as error checking) as though the control symbol were absent. The control symbol is thus embedded in a manner such that a receiving node need not receive a complete message, or even a complete packet, before acting on the control symbol. The beginning and end of the interrupted packet, meanwhile, are handled as a single message packet, and are processed by the receiving node in properly-aligned bit positions, allowing message flow to continue along the link without interruption. Thus, retransmission of the affected packet or message is not required. The result is that control operations dictated by the embedded control symbol are effected immediately and without slowing down communications.

Provided are a packet processing apparatus and method used when an output bitstream of an embedded codec is divided into a plurality of packets and transmitted accordingly, and more particularly, an efficient packet processing apparatus and method which can reduce deterioration of sound quality which may occur when a packet required for the reproduction of a voice signal is not received due to different arrival times of a plurality of packets at a receiving end if an output bitstream of an embedded codec is divided into the packets and transmitted accordingly through a path or a plurality of paths. In particular, an apparatus for processing packets of an embedded codec is provided. The apparatus includes a packet reception unit receiving packets, a layer information unit identifying layer information from received packets, a bitstream determination unit using the received packets, and a bitstream generation unit generating a new bitstream. The apparatus is used to provide a voice and multimedia service using an embedded codec in a packet network.

The embodiment of the invention discloses an adaptive threshold adjusting method. The method includes the steps of acquiring the reception information of adata packet; adjusting a threshold according to the adjustment method corresponding to the reception information of the data packet, and taking the adjusted threshold as the current threshold. The invention also discloses an adaptive threshold adjusting device. The adoption of the invention can implement adaptive threshold adjustment, can ensure the control operation implemented on the basis of the threshold to adapt to the requirement of the fast-changing wireless circumstance, and can improve the communication quality.