A method is provided in a receiving node for handling status information of data units transmitted from a sending node to the receiving node over a radio link. The receiving node establishes that a number of data units that has been transmitted by the sending node are missing. The receiving node sends a reduced status message to the sending node over the radio link, which message is reduced such that it comprises the negative acknowledgement for a first part of missing data units and omits negative acknowledgements for the rest of the missing data units. The omitted negative acknowledgement for the rest of the missing data units will not erroneously be interpreted as correctly received data units by the sending node.

A method is provided in a receiving node for handling status information of data units transmitted from a sending node to the receiving node over a radio link. The receiving node establishes that a number of data units that has been transmitted by the sending node are missing. The receiving node sends a reduced status message to the sending node over the radio link, which message is reduced such that it comprises the negative acknowledgement for a first part of missing data units and omits negative acknowledgements for the rest of the missing data units. The omitted negative acknowledgement for the rest of the missing data units will not erroneously be interpreted as correctly received data units by the sending node.

Disclosed are methods, systems, devices, apparatuses, computer-/processor-readable media, and other implementations for data communication in which data is divided into multiple data blocks, with each of the multiple data blocks including a portion of a respective at least one other of the multiple data blocks to produce multiple corresponding resultant data blocks. Additionally, at least one validation code is generated based on the multiple corresponding resultant data blocks. At least the multiple corresponding resultant data blocks and the at least one validation code are communicated to a remote device.

Rate control is provided for communicating within a wireless communication network. In some examples, redundant packet information transmitted over separate links, each link having its own independent rate control loop, can result in improvement in packet reliability with fast convergence to a desired error level. In other examples, artificial degradation of a received data stream can be utilized to improve packet reliability, also with fast convergence to the desired error level.

A communication system including a transmission apparatus and a reception apparatus, the transmission apparatus including: a buffer configured to hold first data to transmit; transmission means configured to transmit the first data to the reception apparatus; reception means configured to receive second data that the reception apparatus returns; comparison means configured to compare the second data with the first data held by the buffer; and control means configured, when a result of the comparison by the comparison means is unmatch, to instruct the transmission means to retransmit the first data.

Systems and methods automatically detect missing data and attempt to collect the missing data. The missing data may be related to a data reading or may be related to an event. The missing data is detected by comparing a communication received from an endpoint with previously received communications from the endpoint. The communication technology used by the endpoint may be considered in determining how to detect missing data and how to request the missing data from the endpoint. A single headend system may communicate with endpoints that use different communication technologies by adjusting the speed, batch size and the retry process used.

An electronic device is provided. The electronic device includes a first communication circuit, a second communication circuit, and at least one processor. The first communication circuit is configured to receive, in a first band, a first reflective signal reflected by an object, and obtain, based on the received first reflective signal, a first channel impulse response corresponding to the first reflective signal. The second communication circuit is configured to receive, in a second band, a second reflective signal reflected by the object, obtain, based on the received second reflective signal, a second channel impulse response corresponding to the second reflective signal, and obtain a third channel impulse response based on a first calculation using the second channel impulse response, a first central frequency of the first band and a second central frequency of the second band.

Methods, systems, and devices for wireless communications are described that support group-based acknowledgment feedback techniques. Two or more different groups of downlink transmissions may each have an associated group-based acknowledgment feedback, and a base station may transmit downlink control information to a UE that indicates one or more parameters that are used to determine which downlink transmissions are to be reported in the group-based feedback. Based on the parameters in the downlink control information, the UE may determine the feedback to be reported, and a timing for when to transmit the feedback to the base station.

LTE TDD with Carrier Aggregation, a sequence number or downlink assignment indicator can be attached to downlink control information (DCI) messages relating to packets transmitted on some or all of successive carrier frequencies in a given subframe. The sequence number is incremented or decremented for each DCI transmitted depending on whether the total number of DCI message transmitted in a given subframe is even or odd. Including determining a number of control messages, meeting at least one criterion and for transmission in a sequence; and associating sequence information with each control message in the sequence, the sequence information differing between successive control messages. The associating accounting for a number of control messages so that first sequence information, associated with control messages in a first sequence, is distinguishable from second sequence information, associated with control messages in a second sequence having a number of control messages different from the first sequence.

In LTE TDD with Carrier Aggregation (CA), a two bit sequence number or downlink assignment indicator (DAI) can be attached to downlink control information (DCI) messages relating to packets transmitted on some or all of successive carrier frequencies in a given subframe. The numerical progression of the sequence numbers can be used to determine the number of ACK/NACK bits (ACK/NACK codebook size) needed to acknowledge reception of the packets. The receiver determines the ACK/NACK codebook size to within a certain granularity or other constraints, depending on the received sequence of DAI values. The granularity or constraint(s) may be pre-determined, or configured or indicated by the sequence. This allows a more accurate and reliable common understanding between the transmitter and receiver concerning the number of DCI messages transmitted.