Abstract: An apparatus and method for decoding a Low Density Parity Check (LDPC) code having a maximum error correction capability and an error detection capability. In the apparatus, a decoder receives a signal, and decodes the received signal according to a second parity check matrix having parity check expressions obtained by selecting a predetermined number of dependent parity check expressions among dependent parity check expressions generated by combining, with a predetermined scheme, parity check expressions representing rows of a first parity check matrix obtained by encoding information data into a block code having an optimum minimum distance considering a predetermined coding rate, and adding the selected dependent parity check expressions to the parity check expressions of the first parity check matrix. An error detector determines if there is an error in a signal output from the decoder.

Abstract: A method for transmitting data by using hybrid automatic repeat request (HARQ) includes allocating a radio resource for a non-acknowledgment (NACK) channel which is used to transmit a NACK signal for multi-user data of a plurality of UEs, transmitting the multi-user data, and retransmitting the multi-user data when receiving the NACK signal on the NACK channel from at least one UE which receives the multi-user data.

Abstract: A hierarchical fanout connectivity infrastructure is built and used to start a parallel application within a parallel computing environment. The connectivity infrastructure is passed to a checkpoint library, which employs the infrastructure and a defined sequence of events, to perform checkpoint, restart and/or migration operations on the parallel application.

Abstract: A wireless communication apparatus that uses a communication protocol to transmit and receive data with a data check bit, including a received data determining section that performs a data check for received data by using the data check bit to determine whether the data is error; a received result transmitting section that, when determined to be error, discards the data and transmits a retransmission request to other wireless communication apparatus of the transmitting origin, whereas determined to be not error, transmits a message indicating that the data is normal to the other wireless communication apparatus of the transmitting origin; and a retransmission asking section that determines whether a format of the data is incorrect or normal, and when determined to be normal, passes the data to predetermined processing, whereas when determined to be incorrect, discards the data and asks the received result transmitting section to request retransmission of the data.

Abstract: Methods, systems, and computer program products that provide for a runtime messaging infrastructure, which abstracts send and receive operations for exchanging messages with partner endpoint. The messaging infrastructure improves availability and scalability of a message application by improving on the availability and scalability of the underlying message transports. In particular, availability and scalability are improved by linking the message application at runtime with any number of the message transports, without the message application specifying a transport at development time. The message infrastructure receives instructions from the message application specifying end-to-end delivery assurances. The infrastructure uses transports in order to fulfill the specified delivery assurance, and creates a link between the message application and transports for use in exchanging messages.

Abstract: A method, apparatus, and computer program product for handling a failure condition in a storage controller is disclosed. In certain embodiments, a method may include initially detecting a failure condition in a storage controller. The failure condition may be associated with a specific host and a specific storage device connected to the storage controller. The method may further include determining a failure ID associated with the failure condition. Using the failure ID, en entry may be located in a data collection and recovery table. This entry may indicate one or more data collection and/or recovery processes to execute in response to the failure condition. The method may then execute the data collection and/or recovery processes indicated in the entry. While executing the data collection and/or recovery processes, connectivity may be maintained between hosts and storage devices not associated with the failure condition.

Abstract: In forming a cluster of processors and applications among a plurality of processors connected in a network the embodiment of a pair of cluster nodes, as applications, in each server/system and arranging for communication between them in a ring or tiered ring configuration of servers/systems provides network status monitoring and failure recovery in a highly redundant and flexible manner at increased speed without the requirement of separate communication links for monitoring and control or redundant hardware such as a so-called “hot standby” processor in each server/system.

Abstract: Certain embodiments of the present disclosure control whether or not certain protocol stack operation are performed in a hardware (HW) protocol stack accelerator based on ARQ/HARQ re-transmission rate. Latency penalties associated with using the HW accelerator are typically higher than the data movement overhead when this data does not need to be processed by the HW accelerator, such as when a re-transmission error occurs. According to certain embodiments, the HW accelerator is activated if the ARQ/HARQ re-transmission rate is below a threshold value. Otherwise, if the ARQ/HARQ re-transmission rate is above a threshold, at least a portion of the HW accelerator may be de-activated, which may reduce overhead associated with moving data between the protocol stack and the HW accelerator.

Abstract: Methods and apparatus for setting the connection identifier (CID) mask length of a Hybrid Automatic Repeat-Request (HARQ)-MAP or a SUB-MAP pointer information element (IE) in a compressed downlink map (DL-MAP) of an orthogonal frequency-division multiple access (OFDMA) frame are provided in an effort to reduce the number of false indications in the CID mask, while also striving, as a secondary concern, to reduce the CID mask length. In this manner, an individual mobile station (MS) may not waste processing, battery power, or time interpreting a HARQ-MAP message or a sub downlink/uplink map (SUB-DL-UL-MAP) message that was not intended for this particular MS. For some embodiments where the CID mask length is set to be small, the control overhead (i.e., the size of the HARQ-MAP or the SUB-MAP pointer IE) may be decreased, and more of the OFDMA frame may be available for data traffic.

Abstract: A new transport protocol between the IP layer and the DDP layer for use with RDMA operations. The embodiments all operate on a CEE-compliant layer 2 Ethernet network to allow the new transport protocol to be simplified, providing higher performance and simpler implementation. The new protocol allows a CEE-compliant layer 2 Ethernet network to provide data networking using IP, storage using FCoE, and RDMA using IP and the new transport protocol, without suffering the previous performance penalties in any of these aspects.

Abstract: Methods of controlling peers of a relay ARQ protocol are described. It is proposed to provide a predetermined marking in the payload section of messages of the relay ARQ protocol, such that relay peers along the relay connections can extract information from the payload section.

Abstract: A system and method for fragmented transmission and retransmission in a communication network. According to various embodiments of the disclosed method and apparatus, a method for fragmenting a protocol data unit for transmission from a source node in a communication network includes the operations of determining a plurality of subpackets in which to send the protocol data unit having one or more service data units; creating a data unit header for a first of the plurality of subpackets; identifying one or more fragments for inclusion in the first of the plurality of subpackets; creating an aggregation subheader for the first of the plurality of subpackets, wherein the aggregation subheader comprises data identifying the one or more fragments; and concatenating the data unit header, one or more fragments and aggregation subheader to build the first of the plurality of subpackets.

Abstract: A method of distinguishing hybrid automatic repeat request, hereinafter called HARQ, processes for a mobile device of a wireless communication system includes assigning a plurality of HARQ reference numbers corresponding to a plurality of uplink HARQ processes respectively, for identifying each of the plurality of uplink HARQ processes.

Abstract: In a wireless communications network, a wireless device may examine the received signal to determine the strength of the received signal, and also determine the level of interference and noise. If a retransmission is needed due to a message being incorrectly received, these factors may then be processed to estimate whether the probable cause of poor reception is interference from a neighboring network. If such interference is the likely cause, the retransmission may be changed to a different time and/or to different frequencies in a subsequent frame, so that the interference from the neighboring network is less likely to reoccur.

Abstract: A method and device are provided for initiating corrective actions for a terminal, such as an ATM. A method of initiating corrective actions for a terminal comprises, monitoring a fault status of a first component, detecting a fault status of the first component with a first trigger plug-in, activating a first action plug-in based upon the detected fault status of the first component, and recycling the first component.

Abstract: An efficient method to apply an erasure encoding and decoding scheme across dispersed data stores that receive constant updates. A data store is a persistent memory for storing a data block. Such data stores include, without limitation, a group of disks, a group of disk arrays, or the like. An encoding process applies a sequencing method to assign a sequence number to each data and checksum block as they are modified and updated onto their data stores. The method preferably uses the sequence number to identify data set consistency. The sequencing method allows for self-healing of each individual data store, and it maintains data consistency and correctness within a data block and among a group of data blocks. The inventive technique can be applied on many forms of distributed persistent data stores to provide failure resiliency and to maintain data consistency and correctness.

Abstract: Devices, systems and methods for optimizing a number of retransmission attempts in a multimedia environment and managing delays in a host MAC layer. In its various aspects, the presently claimed invention includes several methodologies and systems that are configured for determining an optimal retry limit in response to one or both of a packet error rate bound and a latency bound. To the extent that the retry limit is determined with respect to one of the aforementioned boundaries, the presently claimed invention may include determining a confidence level that the non-selected bound will also be met by the selected retry limit. The presently claimed invention details devices, systems and methods optimizing the number of retransmission attempts to ensure delivery of the selected data packets while guarding against undue delays and application disruptions.

Abstract: A relay node. The relay node includes a first hybrid automatic repeat request (HARQ) entity providing a first HARQ functionality. The relay node further includes a second HARQ entity providing a second HARQ functionality.

Abstract: A method and system for recovering data from an aborted session via a rule application. A first session having a first document ID is initiated. After an interruption of the first session, a second session having a second document ID is initiated. The first and second document IDs are determined to be identical. The first session is determined to be open in a callee application after the interruption. A rule that associates a recovery action with a data item of the first document is applied by detecting the data item of the first document and selecting the recovery action from multiple predefined recovery actions. The data item of the first document is an identification of a calling application that provides the first and second documents or a value entered by a user of the calling application. The callee application performs the selected recovery action.

Abstract: A large data transmission method in a sensor network based on a media access control (MAC) is provided. The method includes dividing data to be transferred into a plurality of data segments; generating a plurality of media access control (MAC) segmented data frames by including in each data segment an indication that the data is generated by segmentation and assigning a sequence number to the data segment; transmitting the generated MAC segmented data frames sequentially; receiving a MAC reception failure frame indicating reception failure for a predetermined period of time from a receiving sensor node after completing the transmitting of all the MAC segmented data frames; and retransmitting the MAC segmented data frames which correspond to at least one sequence number included in the received MAC reception failure frame. Accordingly, large data transmission times can be reduced in a MAC for a sensor network.

Abstract: An apparatus, system and method for detecting errors in a physical interface during the transmission and/or receipt of data communications between integrated circuits (“ICs”) are disclosed. In one embodiment, an apparatus for generating error-detection codes in a physical interface for the transmission of data communications between integrated circuits (“ICs”) includes an N bit-to-N+2 (“N bit/N+2”) bit physical layer (“PHY”) encoder configured to insert a physical interface error detection bit with N application data bits to form N+1 unencoded data bits, and encode said N+1 unencoded data bits to yield N+2 encoded data bits. The apparatus further includes an error-detection code generator configured to generate a number of bits constituting an error-detection code that includes said physical interface error detection bit, wherein N represents any integer number of data bits.

Abstract: A system includes first, second, and third content servers, and an edge server. The first, second, and third content servers each are configured to cache content. The edge server is in communication with the first, second, and third content servers. The edge server is configured to receive a content request, and to request different portions of the content from each of the first, second, and third content servers based on a network cost of each of the first, second, and third content servers.

Abstract: In a database system, derived data (often called view data or view tables) depends on other data, often called base data (or base tables). When base data on which derived data depends is updated, including changes, additions, and/or deletions, those updates need to be propagated to derived data. Some types of updates, if repeated, result in an incorrect view data state; these updates are termed non-idempotent. To avoid repeating non-idempotent view data updates, signatures are computed that are repeatable, but yet unique to base data on which the view data is based, the view data being updated, and sequence information for updates to the base data (where applicable) and sequence data for multiple changes to the view being updated. The signatures allow detection of view updates that were committed prior to a failure, but which were not confirmed as having been committed to a process that computes the view updates.

Abstract: A wireless sensor node is provided which is divided into functional modules on a function basis and operates the functional modules to cooperatively perform its individual functions. The wireless sensor node includes a wireless transceiver to wirelessly communicate with a control node; a primary configuration unit to set a node identification address in communication with a control node; a secondary configuration unit to use the node identification address to register with the control node and set an address for communication which is assigned by the control node; a basic power supply to supply power to modules for communication and sensor control; functional modules to perform data processing and sensor control; and a functional module activator to activate the functional modules according to a type of received data or an operation for data transmission.

Abstract: The present invention discloses an H-ARQ scheme: In the case of wireless channel is in good condition, user equipment will send NACK signals and other control information only when it has received an incorrect data packet, otherwise the user equipment will not send ACK signals; in the case of wireless channel is in bad condition, existing H-ARQ schemes will be adopted.

Abstract: Disclosed are a retransmission method and a communication system which can realize a preferable trade-off between the feedback information amount and the error ratio characteristic. In the communication system, an encoding unit (703) packetizes an channel coding codeword inputted from a signal source (701) and generates a plurality of packets each formed by one or more encoded bit contained in the channel coding codeword. When it is judged that a decoding error has occurred, a retransmission judgment unit (719) selects one packet having the least likelihood among the packets constituting the channel coding codeword received via a reception antenna (713) and feeds the packet number of the selected packet together with NACK back to a transmission device (150). The transmission device (150) retransmits a packet corresponding to the packet number fed back from the reception device (160) and a redundant version.

Abstract: Slices obtained by dividing the real data storage area of the storage device by segments are assigned to each of a plurality of segments obtained by dividing a virtual logical volume as a primary slice storing data of the segment as a destination of access made by an access node and/or a secondary slice that mirrors and stores data of the primary slice. Management information associates the segment with the primary slice and the secondary slice. A survival signal transmitted at predetermined intervals while a computer is normally operating is monitored. The computer from which the survival signal is not detected over a predetermined time period is detected as a failure node. The failure node is checked against the management information, the managed slice is set as a single primary slice that is an access destination of the access node for which the mirroring is stopped. The failure node is isolated.

Abstract: A radio communication system includes a transmitter. The transmitter includes a packet generating unit that generates a plurality of transmission packets from single transmission data and arranges the transmission packets in a space direction such that the transmission packets can be simultaneously transmitted; and a transmitting unit that separately carries out predetermined transmission processing on each of the transmission packets arranged in the space direction and simultaneously transmits the transmission packets using streams corresponding to the transmission packets.

Abstract: An electronic device and method for restoring personalized function settings include setting a restoring function, relating the restoring function to one or more function settings of the electronic device, and creating a backup file including retrieved personalized function settings of a designated function setting. The electronic device and method further include determining a backup file, and restoring the personalized function settings of a determined function setting corresponding to the determined backup file.

Abstract: It is provided about a communication system adapting for car, communication apparatus adapting for car and a communication method adapting for car that can perform data transmission under extensive range from a low speed communication to high speed communication, without generating data delay, data dropout and the like, caused by the data sending collision. A gateway and an ECU are connected to each other, in a one-to-one manner, via a communication line different from another communication line for another connection. When receiving a message, the gateway and the ECU reply a receipt response. When having a message to be sent toward the destination for replying at this replying time, the gateway and the ECU sends the receipt response onto which this message to be sent is added. When a message sending collision is generated, the gateway preferentially performs a message re-sending operation.

Abstract: Techniques are provided for video communication between multiple devices. Each of a plurality of video packets is designated as being part of a required reference frame that is subsequently to be used for a repair process. A stream of video packets that includes the packets for the required reference frame is transmitted from a source device over a communication medium for reception by a plurality of destination devices. A determination is made that at least one of the plurality of destination devices did not receive at least one packet of the required reference frame, and the at least one packet is retransmitted the at least one of the plurality of destination devices. When the retransmitted packet is received at the at least one destination device, it is decoded and stored without using it for generating a picture for display at the time that the at least one packet is received.

Abstract: A data protection method is provided. The data protection method is adapted for a plurality of pages of a plurality of blocks in a memory. The data protection method records bit error weight values and erasing times of the blocks during routine operations of the memory. Therefore, when the system is in an idle status, the data of those blocks having higher bit error weight values can be recovered. Further, the data protection method moves data of those blocks having less erasing times to other blocks, so as to release the blocks having less erasing times from the data area for use. Then, the data protection method utilizes all blocks of the non-volatile memory in an average manner, so as to effectively protect the data saved in the memory and average the erasing operations.

Abstract: The disclosure provides an HVAC data processing and communication network and a method of manufacturing the same. In an embodiment, the network includes a local controller. The local controller is configured to publish a first message to a data bus, and to detect a collision between the first message and a second message published to the data bus. The local controller is further configured to republish the first message in the event that the first message collides with a second message published to the data bus; a bit error results in response to publishing the message.

Abstract: A method of improving uplink transmission of TTI bundling for a MAC layer of a user equipment in a wireless communication system includes receiving a first signaling and a second signaling, and when a transmission collision happens between a first transmission corresponding to the first signaling and a second transmission corresponding to the second signaling, handling the transmission collision according to a type of the first signaling and a type of the second signaling.

Abstract: A communications system is provided. A first communications device requests one or more dedicated service periods, via a request, to transmit a high rate real-time streaming data. A second communications device receives the request and schedules the dedicated service periods and one or more contention based periods. A third communications device receives the high rate real-time streaming data and requests the first communications device to re-transmit a portion of the high rate real-time streaming data. The request includes information about the high rate real-time streaming data and information pertinent to a probability of re-transmission. The contention based periods are scheduled to provide the first communications device having higher priority over communications devices of the communications system.

Abstract: An aspect of the present invention reduces the additional number of signal lines of a bus (180) for control signals by using a set of signal lines to transfer data bits in some durations and to transfer control signals in some other durations. In one embodiment, the same signal lines are used to transfer data in a data transfer phase, and for bus arbitration (150) in a bus (180) arbitration phase. As a result, the total number of signal lines of a bus (180) (bus width) is reduced. According to another aspect of the present invention, an arbitrator (150) block allocates the bus (180) to one of the requesting modules according to an assigned priority and least recently used (LRU) policy.

Abstract: Systems and methods for active link verification for failover operations in a storage network are disclosed. An exemplary method includes issuing a command from a first port of a storage device to a local network device in the storage network. The method also includes receiving a response to the command at the first port of the storage device from the local network device in the storage network. The storage device fails over to a second port of the storage device if no response is received at the first port of the storage device.

Abstract: Systems and methodologies are described herein that facilitate Hybrid Automatic Repeat Request (H-ARQ) scheduling and coordination in a wireless communication system. As described herein, a network node capable of cooperation with other nodes for communication to respective users can coordinate a cooperation strategy across nodes based on a H-ARQ protocol to be utilized for a given user. In the case of a synchronous H-ARQ protocol, communication can be scheduled as described herein such that initial transmissions to a user are conducted cooperatively and re-transmissions are conducted without inter-node cooperation. In the case of a H-ARQ protocol utilizing persistent assignments, transmission intervals can be calculated and utilized based on application latency requirements, backhaul link latency, or other factors.

Abstract: A test apparatus for testing a portable communication unit. The test apparatus comprises a test unit adapted to supply test input data to the portable communication unit and retrieve test output data at least from the portable communication unit in accordance with a test schedule. The test apparatus further comprises a wireless interface unit adapted to provide a communication link between the test apparatus and a server located remotely from the test apparatus. The test unit is adapted to retrieve, from the server, at least part of the test input data. Moreover, the test unit is adapted to forward, to the server, at least part of the test output data. A method of testing the portable communication unit is also disclosed.

Abstract: A method of HARQ process configuration in a mobile communication system, wherein a plurality of HARQ processes are transmitted from a transmitter to a receiver including the step of configuring a plurality of HARQ processes of unrestricted use for data flows having different priorities and the step of pre-configuring at least one reserved HARQ process for specific data flows of high priority. According to another embodiment, instead of a reserved HARQ process, an additional HARQ process is pre-configured.

Abstract: An adaptive and scalable packet error correction apparatus and method in a wireless multicast network is provided. Each retransmission request from a receiver contains a round number and the number of repairs sent in that round. At each receiver, there are two counters for counting the rounds sent out on the network and the number of repairs that have been required. A receiver on the wireless multicast network listens to the ARQ requests sent by other receivers to update the two counters and determines whether its request should be suppressed or be sent out.

Abstract: A method of transmitting data using hybrid automatic repeat request (HARQ) is provided. The method includes transmitting an initial data, receiving a retransmission request for the initial data, generating a retransmission data by shifting the phase of the initial data on signal constellation and transmitting the retransmission data. Inter-cell interference or intra-cell interference can be mitigated.

Abstract: A pool is replicated in the unit of volume providing the pool, and when a physical device is blocked, any volume blocked in the pool is changed to the replicated volume so that the pool and a virtual volume can be recovered. With such a configuration, when any pool or virtual volume is blocked due to blockage of any volume providing the thin provisioning function, volume recovery can be swiftly performed without changing the virtual volume used by a host computer, and consumption of storage resources needed therefor can be suppressed.

Abstract: A system comprises processing logic configured to assert a lockup signal upon detection of a fault condition and a module coupled to the processing logic and configured to activate a counter upon receiving the lockup signal. After the module activates the counter and before the counter reaches a predetermined threshold, the processing logic attempts to correct the fault condition and the module prevents the processing logic from being reset.

Abstract: When a reception unit in an X-ray image reception system receives an image and additional information for the image from an X-ray image transmission system, the received additional information is sent to a resend setting determination unit. The resend setting determination unit determines a resend setting based on the received additional information and information acquired from a database and transmits the result to a reception completion determination unit. A packet loss determination unit determines packet loss in data received from the reception unit and transmits the result to the reception completion determination unit. The reception determination completion unit sends the results to the resent setting determination unit and the packet loss determination unit to the resend request unit. The resend request unit sends a resend request to the X-ray image transmission system based on the information from the reception unit and the result determined by the reception completion determination unit.

Abstract: A method for storing data in a mobile device includes initializing a memory of the mobile device when the mobile device is powered on, allocating a free block of memory from the memory, saving received new data in the free block, and allocating a new free block again from the memory for saving received new data next time. The method further includes prompting for sufficient memory space to be manually freed from the memory if the new free block allocation is a failure, and re-prompting for sufficient memory space to be manually freed from the memory until a preset prompt time has been prompted if sufficient memory space has not been manually freed, or allocating a new free block of memory from the memory if sufficient memory space has been manually freed.

Abstract: Methods and apparatus are provided for improved physical re-read operations in a hard disk drive. The disclosed methods and apparatus selectively retain data in a hard disk drive. A signal is read in an iterative read channel by assigning a reliability metric to each of a plurality of segments in a read signal; repeating the assigning step for a plurality of read operations; and selectively retaining the segments based on the assigned reliability metric. The read signal can be obtained by positioning a transducer over a storage media. The reliability metric may be based on soft bit decisions; log likelihood ratios or a noise estimation of a given segment.

Abstract: A system includes a solid state persistent storage device, and a plurality of storage controllers to manage access of the solid state persistent storage device. An expander circuit is connected to the solid state persistent storage device and has a plurality of computer-based bus interfaces connected to the corresponding plurality of storage controllers.

Abstract: To facilitate retransmission of a data file that has been deleted from a server, a data processing device includes a first storage section in which a management table is stored. The management table includes a list of communication histories with respect to communications with each of the servers. Each communication history indicates a data file transmitted to the server. The device further includes a second storage section storing data files transmitted to the servers. A control section is provided for judging, when a communication section is in communication with a server, whether or not a data file which has already been transmitted to the server needs to be retransmitted and retransmit the data file to the server upon retrieving the data file from the second storage section when judgment is made so that retransmission of the data file is needed.

Abstract: A storage controller changes a block size to carry out a shredding process. A data shredder uses a large block size set by a block size setting part to write shredding data in a storage area of a disk drive and erase data stored therein. An error arising during the writing operation of the shredding data is detected by an error detecting part. When the error is detected, the block size setting part sets the block size smaller by one stage than the initial block size to the data shredder. Every time the error arises, the block size used in the shredding process is diminished. Thus, the number of times of writings of the shredding data is reduced as much as possible to improve a processing speed and erase the data of a wide range as much as possible.