Abstract: A cache device is disposed on a connection path between a user computer executing a software application and a network. The application exchanges data with a further computer via the network. The cache device includes a cache memory and a processor. The cache device is configured to measure, by the processor, a first latency between the user computer and the further computer. The cache device is further configured to determine an acceptable latency range based on the latency and a requirement of the software application. The cache device is further configured to measure a second latency between the user computer and the further computer. The cache device is further configured to store, in the cache memory, a set of data transmitted from the user computer to the further computer, if the second latency is not within the acceptable latency range.

Abstract: A communication device includes: a reception unit which receives a signal including an initial transmission signal and a retransmission signal for any one signal; a detection order determination unit which determines an order of detection of the initial transmission signal and the retransmission signal from the signal received by the reception unit, according to retransmission repetition numbers of the initial transmission signal and the retransmission signal; and a signal detection unit which detects signals including detected signals for the initial transmission signal and the retransmission signal from the signal received by the reception unit using signals detected by the communication device according to the order determined by the detection order determination unit.

Abstract: A system and method for MIMO communications is provided. A method includes receiving a data block of P matrices from a transmitter, and determining if operating conditions are met. The method also includes if operating conditions are not met, computing a test position, selecting a codeword based on the test position, and computing a metric. The metric may then be compared with an error radius to determine a validity of the codeword. If the codeword is invalid, another codeword is selected. If the codeword is valid, then the codeword is stored if all matrices have been evaluated, else another matrix is selected for evaluation. If matrices earlier in the data block have untested codewords while all codewords for a matrix being evaluated have been tested, backtracking may be performed. After the codewords for the data block have been found, the stored data may be outputted and processed.

Abstract: A network controller for facilitating roaming of a mobile wireless communications device between access points communicates with at least one access point over a wired network which, in turn, communicate with a mobile wireless communications device over a wireless network. The network controller includes a data processing system including a protocol stack that facilitates a communication session between the mobile device and a network device on the wired network, and a session table identifying session information for each said communication session. The session information identifies the current access point with which the mobile device is currently associated. The protocol stack updates the session table from session information received from the current access point, maintains a first virtual circuit with the network device, maintains a second virtual circuit with the current access point, and bridges communication between the virtual circuits in accordance with the session information.

Abstract: A memory system includes a link having at least one signal line and a controller. The controller includes at least one transmitter coupled to the link to transmit first data, and a first error protection generator coupled to the transmitter. The first error protection generator dynamically adds an error detection code to at least a portion of the first data. At least one receiver is coupled to the link to receive second data. A first error detection logic determines if the second data received by the controller contains at least one error and, if an error is detected, asserts a first error condition. The system includes a memory device having at least one memory device transmitter coupled to the link to transmit the second data. A second error protection generator coupled to the memory device transmitter dynamically adds an error detection code to at least a portion of the second data.

Abstract: A method in a wireless communication system comprising a user equipment, an anchor network station and at least one assisting network station, wherein the user equipment transmits the same data to the network stations and the network stations each transmit an acknowledgement of the data to the user equipment in response; and wherein the or each assisting network station also forwards the data to the anchor network station.

Abstract: The invention relates to a method for allocating radio resources to a mobile terminal for data transmission in a mobile communication system as performed by a mobile terminal and a base station, respectively. Moreover, the invention relates to a mobile terminal and a base station to perform such method, as well as an implementation of the method in software. The invention further provides a mobile communication system in which radio resources are allocated to a mobile terminal for uplink transmission. In order to avoid false activation of a semi-persistent resource allocation the invention defines new conditions under which a mobile terminal activates a semi-persistent resource allocation. Unlike for example in prior-art systems, a mobile terminal only activates a semi-persistent resource allocation, if it can confirm the activation command received from the access network. Preferably, the activation command and its confirmation are resource assignments.

Abstract: Problem: A packet error rate in a receiver needs to be effectively reduced. Solution to Problem: A transmitter 11 inserts error detection codes into information packets on one-to-one basis, at a certain layer at which signal processing is performed earlier than at a physical layer, to obtain first information packets. The transmitter 11 codes the first information packets at the physical layer to obtain second information packets, and transmits the second information packets. At the certain layer, the transmitter 11 generates parity packets by coding the information packets and inserts the error detection codes into the parity packets on one-to-one basis to obtain first parity packets. The transmitter codes the first parity packets at the physical layer to obtain second parity packets. The transmitter 11 transmits the second parity packets in accordance with a transmission request from each of one or more receivers.

Abstract: The present disclosure is directed to networks having increased reliability and associated methods. In one aspect, a method for increasing reliability of a multi-hop network can include generating an erasure correction packet from a data packet using an encoder system, and splitting the erasure correction packet into a plurality of erasure correction subpackets. The erasure correction subpackets can then be transmitted across a plurality of network paths of a multi-node network using a communication system. The method can also include identifying successfully received erasure correction subpackets, and regenerating the data packet from the successfully received erasure correction subpackets using a data aggregation system and a decoder system.

Abstract: Error handling in the intermediation of one-way transacted messages. Rather than receiving an inbound message under a transaction, the intermediary performs a non-destructive exclusive read of the message from the source outside of a transaction. Routing logic is applied against the content of the message to determine a collection of message consumers to which a copy of the inbound message is to be sent. Then, under a transaction, the copy of the message is attempted to be sent to each destination. If a send of the copy fails, the transaction is rolled back, but the failure is recorded such that the same transmission mechanism is not, or is less likely to be, tried again in subsequent attempts. The principles may apply to a single message to be sent under the transaction, or to multiple messages to be sent under a single transaction.

Abstract: In the field of radio communications, an uplink data transmission method is provided, which includes: receiving first Physical Downlink Control Channel (PDCCH) signaling sent by a Base Station (BS); and if initial transmission is determined according to a New Data Indicator (NDI) of the first PDCCH signaling, determining that a Modulation Code Scheme (MCS) in the first PDCCH signaling is a normal MCS, and performing an uplink data transmission. A terminal apparatus is further provided. Therefore, the effectiveness of the uplink data transmission is guaranteed in the case that the PDCCH signaling of scheduling initial transmission is lost in the uplink data transmission, and when the uplink data is transmitted, packet loss and false indication of a lower layer to transmit data are avoided.

Abstract: Retransmission techniques are disclosed. These techniques may be used in networks employing contention-based access schemes, such as CSMA. For instance, a device may receive a corrupted packet from a transmitting device, and determine a cause of the corruption. When the determined cause of the corruption is an in-network packet collision, the device allows the transmitting device to send a retransmission of the packet in accordance with a contention-based access scheme. However, when the determined cause of the corruption is other than an in-network packet collision, the device provides retransmission assistance to the transmitting device. This retransmission assistance may include a channel reservation for a retransmission, and/or one or more link adaptation suggestions for the transmitting device.

Abstract: A user terminal for receiving a plurality of data pieces for a plurality of processes that are simultaneously operated. Each of the data pieces has an indicator indicating whether the data piece is new data and is transmitted from a network apparatus that changes an indicator value on a process-by-process basis. The user terminal includes a data receiving unit for receiving the data piece having the indicator, a response transmitting unit for transmitting a response indicating an acknowledgement or a negative acknowledgement for the received data piece, and an indicator determination unit for determining whether the indicator of the received data piece is the same as the indicator of a previous data piece received immediately previously for the same process as the process of the received data piece and whether the response for the previous data piece indicates the acknowledgement to discard the received data piece.

Abstract: A mobile telephone accesses an application server and application software is launched in the server. The application software is run on the application server based upon instructions from the mobile telephone and the result is displayed on the mobile telephone. If the mobile telephone and application server are disconnected and a fixed period of time elapses, the application software that has been launched in the application server is terminated. Since the application server can be allocated to software launched by mobile telephones other than the above-mentioned mobile telephone, the application server can be utilized more efficiently.

Abstract: Provided is a communication device which performs a hybrid automatic repeat request process of requesting a transmission source to perform retransmission when an error is detected from a received signal.

Abstract: A resend operation of application-level messages by communicating control messages over a publish/subscribe channel. A sending module sends application-level original messages to recipients, and stores a copy of the original message in a store. A resend determination module determines, in the event of insufficient acknowledgement of the original message, whether the original message should be resent. If the original message should be resent, the resend determination module also publishes a control message that correlates to the original message. A resend module subscribes in a manner that results in the resend module receiving the control message, and uses the control message to determine that the corresponding original message should be resent, whereupon the original message may be resent using the copy of the original message in the store.

Abstract: A method and device for transmitting uplink control signals in a wireless communication system, the method including: reserving a preassigned scheduling request (SR) physical uplink control channel (PUCCH) resource used for transmission of a SR; determining a frequency domain sequence and an orthogonal sequence based on the preassigned SR PUCCH resource; spreading an ACK/NACK for Hybrid Automatic Repeat Request (HARQ) with the frequency domain sequence and the orthogonal sequence to generate a mapped sequence; and transmitting the mapped sequence

Abstract: An approach is provided for utilizing implicit negative acknowledgement. A determination is made that a user equipment is out of synchronization (e.g., with respect to the uplink). A control signal specifying timing alignment information is generated for transmission to the user equipment. An implicit negative acknowledgement corresponding to retransmission of data is declared if an acknowledgement is not received within a predetermined time interval.

Abstract: The invention relates to a method for receiving data units when using one HARQ process of an HARQ protocol. The memory associated to the HARQ process is divided into several sub-areas, which are addressable by an identifier. Then, when data is received, same is stored in one of the sub-areas. By providing more than one sub-area for one HARQ process, it is possible to actually use one HARQ process for two (or more) different received data units, being from the same data flow or from a different data flow. The actual sub-area of the HARQ process for storing data units can be either freely selected at the receiving end or is indicated by an identifier associated with the data. Furthermore, persistent scheduled data is transmitted in units, scheduled at fixed time intervals. Thus, a control signaling field, usually used for indicating new units, can be used to store the identifier.

Abstract: A verification device includes a data verifying unit that verifies whether data in a packet has an error using a first or a second verification mode, a packet generating unit that generates a packet in accordance with a first packet generation mode or a second packet generation mode respectively corresponding to the first and the second verification modes, a failure monitoring unit that monitors a failure of a transmission line that requires a switching of the verification mode, a switching packet transmitting unit that transmits to a destination device, a switching packet for informing the switching of the verification mode used by the data verifying unit when the failure monitoring unit detects a failure or a removal of a failure, a generation mode switching unit that switches the generation mode, and a verification mode switching unit that switches the verification mode to the one informed by the switching packet.

Abstract: A system and method for processing a distributed transaction for an application are disclosed. Conventionally transactions on critical data (e.g. financial information) are processed using a database architecture whereby a persistent database (typically a redundant disk array) comprises the master record. In cases where large amounts of data need to be accessed but absolute data integrity is less critical, for example search engines, processing is conducted on live in-memory data without all the data being backed up, which can be much faster but data can be lost when processors fail. There have been attempts to use data grid architectures with some backup to persistent stores for more important data but these have either introduced disk access bottlenecks or required manual intervention in the event of failure.

Abstract: An apparatus and a method for operating an Automatic Repeat reQuest (ARQ) in consideration of an operation state of a Hybrid Automatic Repeat reQuest (HARQ) in a wireless communication system. In the method, when an an ARQ timer expires, operation state information of a HARQ module for controlling a HARQ is determined. Whether to delay generation of Negative ACKnowledge (NACK) information in consideration of the operation state information of the HARQ module, then determined. When determining to delay the generation of the NACK information, the generation of the NACK information is delayed for a delay time determined in consideration of the operation state information of the HARQ module.

Abstract: For downlink cooperative multi-point (CoMP) communication, each cooperating transmission point (e.g., base station) may send a retransmission packet with a different redundancy version to a user equipment (UE). Mechanisms may be provided to determine which transmission point should send packets with which redundancy version. For uplink CoMP, in order to reduce the backhaul overhead, each cooperating base station may share only a fraction of the retransmitted packet with the serving base station. Also, different retransmission packets with different redundancy versions can be transmitted to different cooperating base stations using spatial degrees of freedom.

Abstract: On a typical motherboard the processor and memory are separated by a printed circuit data bus that traverses the motherboard. Throughput, or data transfer rate, on the data bus is much lower than the rate at which a modern processor can operate. The difference between the data bus throughput and the processor speed significantly limits the effective processing speed of the computer when the processor is required to process large amounts of data stored in the memory. The processor is forced to wait for data to be transferred to or from the memory, leaving the processor under-utilized. The delays are compounded in a distributed computing system including a number of computers operating in parallel. The present disclosure describes systems, method and apparatus that tend to alleviate delays so that memory access bottlenecks are not compounded within distributed computing systems.

Abstract: A method and device for handling hybrid automatic repeat request (‘HARQ’) operations during transmission mode changes, the method detecting a transmission mode change; and manipulating an HARQ process buffer based on the detecting. Further, a method and network element for handling hybrid automatic repeat request (‘HARQ’) operations during transmission mode changes, the method checking when a user equipment is in a transmission mode uncertainty window; and blocking communications to the user equipment or utilizing a downlink control information format 1A for communications to the user equipment.

Abstract: A method for transmitting and receiving ARQ feedback information in a wireless communication system is disclosed. A method for allowing a mobile station to transmit an ARQ feedback in a broadband wireless access system includes receiving an ARQ block and an ARQ feedback polling from the base station, wherein the ARQ feedback polling requests the mobile station to transmit ARQ feedback information indicating whether the ARQ block is successfully received, receiving a first uplink resource for transmitting the ARQ feedback from the base station, and determining whether the received ARQ block is successfully received. The first uplink resource has a minimum size capable of being allocated to the ARQ feedback information.

Abstract: Disclosed are a method and a system for transmitting a file folder from the sending end to the receiving end. The system uses a file folder transmission unit at the sending end side to generate a directory structure file of the file folder. The directory structure file may have properties such as the size of the file folder, paths and path lengths of the files in the file folder. The sending end then sends the directory structure file to the receiving end through the file folder transmission unit to allow the system to determine which files in the file folder need to be transmitted. The needed files in the file folder are then transmitted to the receiving end according to the determination. The sending end and the receiving end may communicate using an instant messaging tool. The disclosed method and system allow a faster and more convenient file folder network transmission.

Abstract: In one example, a mobile device segments a payload for transmission to a remote server and provides redundant data for each payload segment. The remote server examines the received payload on a per segment basis using the redundant data to identify segments associated with errors. The server then requests error correction bits for the identified segments using one or more exchanges with the mobile device. Thereafter, the server can perform error correction using the received error correction bits and then request re-transmission of the payload, if needed.

Abstract: One object of the present invention is to improve stability of wireless communication by effectively requesting retransmission of data to a wireless communication device, which is a data transmission source, by switching ARQ and HARQ if an error has been detected in received data. In the wireless communication system of the present invention, other wireless communication device (for example, base station 120) includes a transmission data maintaining unit 230, a data transmission unit 234, a retransmission request receiving unit 236, an HARQ data retransmission unit 238, and an ARQ data retransmission unit 240. A wireless communication device (for example, PHS terminal 110) includes a data receiving unit 330, a data demodulation unit 332, an error detection unit 336, a retransmission request selection unit 338, an HARQ processing unit 340 capable of making an HARQ retransmission request, and an ARQ processing unit 360 capable of making an ARQ retransmission request.

Abstract: A method of reconstructing a sequence of video data in a receiving device after the video sequence has been transmitted in encoded form over a network, the encoded video sequence comprising containers of encoded video data, wherein the method includes the following steps: determining (809) containers of encoded video data affected by data losses during their transmission over the network, determining (813) the time that would be necessary for decoding said containers of encoded video data affected by data losses if they had not been affected by data losses, allocating (819, 820, 821) the time thus determined to reconstructing video data of the sequence.

Abstract: A method of handling long term evaluation positioning protocol (LPP) data for a communication device in a wireless communication system is disclosed. The method comprises setting that a first message of a non-access stratum (NAS) layer has higher transmission priority than a second message of a long term evaluation positioning protocol (LPP) layer.

Abstract: The present invention relates to methods and arrangements that enable continuous adaptive control of the number of autonomous HARQ retransmissions. This is achieved by a solution, where the UE and the radio base station are using a number of autonomous HARQ retransmissions that can be adjusted based on observations in the UE and/or the radio base station. What is observed is the amount of HARQ retransmissions needed for the radio base station to correctly decode the latest received data packet(s).

Abstract: Disclosed are a cooperation communication method and system using feedback signals. The cooperation communication method includes transmitting a packet to a base station by a terminal, determining, by the terminal, whether decoding of the transmitted packet is successfully performed using a feedback signal from the base station, and re-transmitting the packet to the base station by the terminal according to whether decoding of a packet of an adjacent terminal within a prescribed distance from the terminal is successfully performed.

Abstract: Embodiments of the present invention provide an acknowledgment channel design in which an acknowledgment sequence is scrambled with a station-specific scrambling sequence. Other embodiments may be described and claimed.

Abstract: An image processing apparatus includes an input portion for inputting image information, an information storage portion for storing the input image information, a transmission portion for transmitting the image information, and a control portion for processing input, storage and transmission of image information in parallel. The control portion, in the case where an input error occurs in the middle of performing input of image information, causes a transmission portion to transmit an instruction to delete information that has been transmitted to a transmission destination, and to start a retransmission after combining the image information before the input error occurs with the image information input after the input error occurred to form one file.

Abstract: A method of transmits a data block of a type from a transmitting device (for example a transmitting network node) to a receiving device (for example a receiving network node), in particular during a temporary block flow. A transmitting device is capable of receiving at least two different types of positive/negative acknowledgements for data blocks of said type from said receiving device and the reaction of the transmitting device to the positive/negative acknowledgements depends on the type of the said received positive/negative acknowledgement.

Abstract: A method for transmitting data to a user agent. The method includes a relay node receiving information from an access node, the information containing the data that is to be transmitted to the user agent and control information that the access node will use to transmit the data to the user agent. The method further includes the relay node transmitting the data to the user agent at the time the access node transmits the data to the user agent, the relay node using the control information that the access node uses to transmit the data to the user agent.

Abstract: Method and apparatus for a base station engaging in transmissions via at least a media access layer with a user entity is disclosed. The base station transmits data to the user entity over a high speed scheduling channel and a high speed packet data scheduling channel. The base station has a plurality of hybrid automatic repeat request (HARQ) entities cooperating with a scheduler for transmitting frames from at least the base station to the user entity for a given HARQ process. Each HARQ entity receives either a not acknowledge signal or an acknowledge signal or detects a discontinuous transmission for a given HARQ process. The base station transmits a next data indicator to the user entity. The user entity has at least one buffer associated with a given HARQ process. The buffer stores and performs incremental combining of received data relating to data from the base station. The buffer is capable of being flushed. A method for a base station is disclosed.

Abstract: A reception device which communicates with a transmission device, the reception device including: a reception unit which receives a signal in which a plurality of data signals are multiplexed, from the transmission device; a data signal detection unit which detects transmission data included in the plurality of data signals from the reception signal received by the reception unit, and outputs the detected transmission data and success/failure of transmission data detection for each data signal; a selection unit which selects some of data signals for which the transmission data detection is not successful among the plurality of multiplexed data signals; a success/failure information signal generation unit which generates success/failure information in data signals for which the transmission data detection is successful and the selected data signals; and a report transmission unit which reports the success/failure information to the transmission device.

Abstract: Provided is a Multimedia Broadcast Multicast Service (MBMS); and, more particularly, a data transmission/receiving method in a multimedia broadcast multicast service system, and an apparatus thereof. The data transmitting method in the MBMS system includes the step of checking a terminal receiving data provided from the MBMS and the step of determining whether there is error report feedback on retransmission of the data according to the number of the detected terminals.

Abstract: A method for receiving a multimedia broadcast/multicast service (MBMS) is provided. The method for receiving a broadcast or multicast service includes: attempting receiving of data via a channel for the broadcast or multicast service; transmitting a negative acknowledgement to a base station if the data is not received via the channel; and receiving the data.

Abstract: A communication device used in a communication system requesting a retransmission signal when detecting an error in a received initial transmission signal, the communication device including: a reception unit which receives the initial transmission signal and the retransmission signal; a synthesis unit which synthesizes a signal based on a retransmission signal and at least one of a signal based on the retransmission signal or the initial transmission signal, when the reception unit receives the retransmission signal; and an iterative detection and decoding unit which performs signal decoding based on a signal obtained through the synthesis in the synthesis unit, thereby reducing the number of retransmissions and the number of iterations of the iteration process.

Abstract: A system and method are provided for determining a minimum number of reserved hybrid automatic repeat request (HARQ) process identifiers (IDs). The method includes, determining a minimum number of reserved HARQ Process IDs based upon a maximum transmission time and a period of a semi-persistent resource allocation.

Abstract: In a transmission apparatus for transmitting periodical data transmitted at predetermined intervals and event data transmitted in response to occurrence of an event, an information generation unit generates identification information for a receiving apparatus to identify transmitted event data, and a control unit includes the generated identification information in the periodical data in response to generation of identification information by the identification information generation unit.

Abstract: A technique for determining in a fading channel environment a scaling factor for soft bit quantization is proposed. In a method realisation, the technique includes repeatedly determining an SNR value for the fading channel, calculating a weighted average based on a plurality of the SNR values, wherein weighting is performed such that contributions of extremal SNR values are attenuated, and determining the scaling factor for soft bit quantization dependent on the weighted average.

Abstract: An embodiment of the invention includes an efficient error-control system and method for recovering packet losses, especially losses in distributing multicast video over broadband residential networks. Preferably, unlike most existing error-control algorithms designed for Internet multicast, the system and method does not employ substantial feedback suppression. Preferably, the system and method does not employ substantial multicasted retransmission. Preferably, the system and method does not employ substantial parity retransmission. Preferably, the system and method does not employ substantial local loss recovery. The system and method integrates two existing classes of error-control algorithms: Automatic Repeat Request (ARQ) and Forward Error Correction (FEC), to reduce traffic overhead and achieve scalability.

Abstract: A radio communications apparatus having a retransmission function that has a determination portion configured to receive an error detection result obtained for a first packet transmitted to a destination apparatus and determine in a first sub-layer whether the error detection result is a positive acknowledgement; a transmission portion configured to transmit a second packet following the first packet to the destination apparatus; a timer portion configured to measure a predetermined period of time after the second packet is transmitted; and a report portion configured to report to a second sub-layer that is an upper sub-layer of the first sub-layer that the error detection result is the positive acknowledgement when no message is received from the destination apparatus during the predetermined period of time, the message indicating that the error detection result is falsely determined to be the positive acknowledgement.

Abstract: A method is provided for transmitting data to user equipments, a communication system, a base station and a mobile station. Data is transmitted to user equipments from a first base station (BBS) and from second base stations (CBS) in a time division multiplexed manner in frames (F). Each frame (F) has a first sub-frame and a second sub-frame. The user equipments are located in cells, each cell comprising a second base station (CBS). Data is transmitted wirelessly, during a first sub-frame of a frame, data from the first base station (BBS) to user equipments in a plurality of cells. Data is transmitted wirelessly, during the second sub-frame of the frame (F), from second base station (CBS) to at least one the plurality of user equipments. The data being transmitted from the first base station (BBS) is also transmitted by the second base station (CBS) to at least one of the plurality of cells.

Abstract: A nonvolatile memory device has a dedicated serial programming port to provide a data path to memory storage. A dedicated power pin supplies power for the programming port to receive data and provide storage in the nonvolatile memory while a power pin for normal device operation is not powered.

Abstract: A system and method of increasing data throughput in a wireless communications network between a base station (BS) and one or more mobile stations (MS) includes establishing a service flow (SF) and initially enabling a hybrid automated repeat request (HARQ) protocol; determining, at a particular time, the measure of quality of the communications channel; comparing the determined measure of quality with a predetermined channel quality threshold; and selectively disabling the HARQ protocol based upon a first comparison result while continuing the SF between the BS and MS. In other aspects, after selectively disabling the HARQ protocol, the method further includes determining that the time-varying measure of quality of the communications channel has deteriorated below the predetermined channel quality threshold; and selectively re-enabling the HARQ protocol in the established SF.