Abstract:
Wireless transmission is performed by storing, in a local memory, a header in association with reference(s) to memory locations in a separate, shared memory storing a payload for a given transmission. Each header can be associated with a QoS queue. When a selected payload is to be transmitted, a PHY preamble can begin, followed by a header from local memory, while a DMA transaction initiates to retrieve payload from the shared memory. Each retrieved portion of payload can include a link to a next location storing a next part of payload. A subsequent DMA is initiated for that part of the payload. A relatively fixed function circuit can initiate DMA and receive payload data; a programmable element can perform payload selection, for example. Multiple payloads can be aggregated (just before transmitting of a preamble) using header information stored in the fast local memory. Memory can be released after ACK of a corresponding payload.
Abstract:
A communication control method according to an embodiment is a communication control method for controlling communication of a user terminal. The communication control method comprises: transmitting, by a cellular base station, data of a predetermined layer, via a WLAN access point to the user terminal; and transmitting, by the user terminal, delivery acknowledgement information based on the received data, via the WLAN access point to the cellular base station.
Abstract:
There is disclosed a method performed by a User Equipment, UE, for Hybrid Automatic Repeat Request, HARQ, retransmission of data in a multi-antenna wireless communication system. The method comprises, receiving Acknowledgement/Negative Acknowledgement, ACK/NACK, feedback information relating to data transmitted on two streams, and performing, upon rank reduction where only one stream is available for transmission, retransmission of data on a cancelled stream over the remaining stream. There is furthermore disclosed a UE configured for performing the method. A transmission method together with an arrangement for a UE is also disclosed.
Abstract:
In a network for reliable transfer of packets from a transmitter to a receiver using an Internet Protocol (IP), a system for packet recovery comprising a detection block (detector) for packet loss detection and a probe device (probe) for Forward Error Correction (FEC) packets transmission, wherein the detector includes means for sending a missing packet report to the probe upon detecting a missing packet, wherein the probe includes means for storing received packets, sending FEC packets and adapting a size of the FEC packets to an error rate computed from the missing packet reports, wherein the size of FEC packets is made larger or smaller responsive to the error rate increasing or decreasing, respectively, and wherein the probe is located close to the transmitter for reliable packets reception and the detector is located close to the receiver for reliably detecting loss of packets in a receiver's surroundings.
Abstract:
A method is provided for performing data transmission using a hybrid automatic repeat request (HARQ) scheme performed by a transmitter. The transmitter transmits uplink data to a receiver, and receives an acknowledgement (ACK) signal for the data from the receiver. The transmitter determines whether or not an uplink grant associated with the ACK signal is received. The transmitter keeps the uplink data in an HARQ buffer of the transmitter without flushing the uplink data if it is determined that the uplink grant associated with the ACK signal is not received within a certain time period from the receiver.
Abstract:
Various embodiments provide methods for a multi-Subscription Identity Module (SIM) wireless communication device for managing data exchanges with a network when an enhanced dedicated channel is requested on a first subscription. The methods may include performing operations during a testing phase to determine whether an enhanced dedicated channel grant is valid after a tune-away to a second subscription is completed, while transmitting data using the enhanced dedicated channel presuming that the enhanced dedicated channel grant is valid during the testing phase. The methods may include recording a list of protocol data units (PDUs) corresponding to data transmitted using the enhanced dedicated channel during the testing phase. The list of PDUs may be cleared and data exchanged with the network in response to determining that the enhanced dedicated channel grant is valid. Otherwise, the multi-SIM wireless communication device may request another enhanced dedicated channel grant.
Abstract:
Systems and methods for transmitting packets over a network of communication channels are provide. A system according to the invention may include first and second nodes in communication with a coax backbone. The first node may further include a retransmission buffer. The system may also include a network access coordinator operative to coordinate access of the nodes to the coax backbone. In a time period at least one first packet is transmitted by the first node to the second node. The first packet may include an indication that retransmission service is applied. The first packet may also include a indication of the length corresponding to the packet. If, during the first time period the packet is not received by the second node, the second node is operative to send a retransmission request to the network access coordinator.
Abstract:
Embodiments include an overlay multicast network. The overlay multicast network may provide a set of features to ensure reliable and timely arrival of multicast data. The embodiments include a congestion control system that may prioritize designated layers of data within a data stream over other layers of the same data stream. Each data stream transmitted over the network may be given an equal share of the bandwidth. Addressing in routing tables maintained by routers may utilize summarized addressing based on the difference in location of the router and destination address. Summarization levels may be adjusted to minimize travel distances for packets in the network. Data from high priority data stream layers may also be retransmitted upon request from a destination machine to ensure reliable delivery of data.
Abstract:
A user equipment includes an acquiring unit configured to record a current quantity of transmission times for performing synchronous hybrid automatic repeat request (HARQ) transmission on data. The user equipment also includes a determining unit, connected to the acquiring unit, and configured to determine, according to the current quantity of transmission times and a maximum quantity of transmission times that is configured by a base station, a manner of the HARQ transmission performed on the data at a current time point. The HARQ transmission manner includes adaptive retransmission and non-adaptive retransmission.
Abstract:
Through the identification of different packet-types, packets can be handled based on an assigned packet handling identifier. This identifier can, for example, enable forwarding of latency-sensitive packets without delay and allow error-sensitive packets to be stored for possible retransmission. In another embodiment, and optionally in conjunction with retransmission protocols including a packet handling identifier, a memory used for retransmission of packets can be shared with other transceiver functionality such as, coding, decoding, interleaving, deinterleaving, error correction, and the like.