81 results about "Hybrid automatic repeat request harq" patented technology

A method and apparatus of wireless communication between a base station and at least one user equipment. The method includes: transmitting an enhanced physical downlink control channel from the base station to the at least one user equipment using a demodulation reference signal antenna port; transmitting message from the base station to the at least one user equipment which is scheduled by the enhanced physical downlink control channel; receiving the message at the at least one user equipment; determining at the at least one user equipment whether the message was correctly received; and transmitting an ACK/NAK signal on an ACK/NAK resource determined from the enhanced physical downlink control channel from the at least one user equipment to the base station indicating whether the message was correctly received by the at least one user.

A method, system and device are provided for avoiding in-device coexistence interference between different radio technologies deployed in adjacent bands on the same device by controlling and separating the LTE signaling and the non-LTE signaling using dedicated time intervals to separate LTE signaling from non-LTE signaling. In addition, coexistence mode handover procedures are provided which use threshold-based triggering events to avoid coexistence interference and to prevent ping-pong effects by establishing a “keeping time” parameter so that a non-interfering network node does not switch back to an interfering network node after handoff. Coexistence interference is also avoided by providing a hybrid automatic repeat request (HARQ) mechanism which accounts for coexistence interference by providing a fixed or variable on-interval parameter and an activity parameter indicating whether non-LTE activity is present to maximize a time interval for non-LTE devices without interference from LTE activity on the same device.

System and method embodiments are provided for enabling flexible and reliable UE-to-UE based relay. The embodiments include using fountain codes for combining signals at a suitable network layer higher than a media access control (MAC) sub-layer and using a MAC sub-layer hybrid automatic repeat request (HARQ) transmission scheme. When a relay UE in a UE group for joint reception receives, from a network access point, a data packet intended for a destination UE in the UE group and including fountain code at the higher network layer, the relay UE sends the data packet to the destination UE and returns a HARQ ACK message at the MAC sub-layer to the access point. The destination UE then receives and decodes the data packet. Subsequently, upon receiving the entire data, the destination UE sends an ACK message at the higher network layer to the access point.

The present disclosure relates to a data transmission method, apparatus, device and system for direct communication of direct communication, and belongs to the field of communication. The method includes: when direct hybrid automatic repeat request HARQ feedback information and uplink information need to be sent in the target time unit, and the direct HARQ feedback information and the uplink information meet a predetermined timing relationship, a first terminal is the direct HARQ feedback information and the uplink information to an access network device on a same physical layer uplink channelin a target time unit. In the above manner, when the direct HARQ feedback information and the uplink information need to be sent in the target time unit, the direct HARQ feedback information and theuplink information satisfy at least a predetermined timing relationship to ensure that the first terminal can process the uplink multiplexing transmission in time. The success rate of information transmission and reception in the direct communication scenario is fully ensured.

A system and method for mapping and decoding codewords in acknowledgement information communications are provided. A method for communications device operations includes determining a hybrid automatic repeat request (HARQ) response for each component carrier (CC) in a set of configured CCs, thereby producing a set of HARQ responses, generating an information vector from the set of HARQ responses, encoding the information vector based on a (n, k) linear block code corresponding to the set of configured CCs, and transmitting the encoded information vector. A unique set of bits selected from the information vector is assigned to represent a HARQ response for each different CC in the set of configured CCs. the (n, k) linear block code is obtained by a linear transformation of an original (n, k) linear block code, where n is a length of code words, and k is a length of information vectors.

The invention discloses a collocation method for hybrid automatic repeat request HARQ parameters, and the method comprises the following steps: service flow request information which is sent by a sender is received, and the service flow request information carries the HARQ parameters which are required by a sender device; and a request response message is sent to the sender device. The embodiment of the invention also provides a collocation system and a device for the HARQ parameters. By the embodiment of the invention, different HARQ parameters are collocated for different service flows, thus making up the defect that the HARQ parameters of different service flows are collocated without distinguishing in the prior art and ensuring better quality of service (QoS).

An uplink HARQ method in a transparent relay network is provided. When a base station does not successfully receive uplink data sent from a mobile terminal to the base station, if a relay station has successfully received the uplink data sent by the mobile terminal, response acknowledgment information representing that the relay station has successfully received the uplink data sent by the mobile terminal is sent to the mobile terminal, so that the mobile terminal learns in time that the relay station has successfully received the uplink data sent from the mobile terminal to the base station. Meanwhile, negative-acknowledgment response information is returned to the relay station, and the relay station performs subsequent uplink data retransmission, which avoids unnecessary retransmission of the mobile terminal, thereby decreasing retransmission times of the mobile terminal and further reducing power consumption of the mobile terminal.

A method is disclosed comprising defining a hybrid automatic repeat request HARQ profile for a user terminal among a plurality of HARQ profiles available. In an embodiment, the HARQ profile indicates a first time interval between downlink transmission being received in the terminal and corresponding uplink control information being expected to be transmitted from the terminal, and a second time interval between the uplink control information being transmitted from the terminal and corresponding downlink retransmission at earliest being expected to be received in the terminal. In another embodiment, the HARQ profile indicates a third time interval between uplink transmission being received in a base station and corresponding downlink information being expected to be transmitted from the base station, and a fourth time interval between the downlink information being transmitted from the base station and corresponding uplink retransmission at earliest being expected to be received in the base station.

The invention discloses a scheduling method and a base station for a multi-carrier system. The method includes: in each subcarrier used by a user equipment UE, the base station obtains predetermined information of the UE, wherein the predetermined information includes: channel quality indicator CQI information and hybrid automatic repeat request HARQ information; the base station determines the priority value of the UE according to the predetermined information; the base station schedules multiple UEs according to the sequence of priority values ​​of multiple UEs from large to small. The invention improves the scheduling accuracy, thereby further improving the scheduling performance.

A communication device for handling a hybrid automatic repeat request (HARQ) transmission comprises a storage unit for storing instructions and a processing circuit coupled to the storage unit. The processing circuit is configured to execute the instructions stored in the storage unit. The instructions comprise performing a first downlink (DL) reception in a first subframe from a serving cell; and transmitting a first HARQ feedback in response to the first DL reception in a second subframe to the serving cell, wherein the second subframe is determined according to the first subframe and a sum of a predetermined timing and a first HARQ timing.

A method includes obtaining a precoder for retransmission of one codeword responsive to a known precoding matrix of a certain rank and modulation and coding scheme assignments used in an original transmission, and a desired retransmission rank', forming an approximate channel covariance matrix; stimating an a minimum mean square error receiver signal-to-noise-interference-ratio for each layer to be retransmitted responsive to the prior forming; and finding a precoding matrix from a preceding codebook that maximizes a sum-rate for enabling precoding selections for retransmissions in uplink multiple-input multiple-output MIMO hybrid automatic repeat request HARQ.

A method of transmitting hybrid automatic repeat request (HARQ) feedbacks for a communication device comprises transmitting at least one first HARQ feedback to a first base station according to first downlink (DL) control information (DCI) indicating at least one first DL packet, if the at least one first HARQ feedback is at least triggered by the at least one first DL packet, wherein the at least one first DL packet is transmitted by the first base station to the communication device; and transmitting at least one second HARQ feedback to the first base station, if the at least one second HARQ feedback is only triggered by at least one second DL packet, wherein the at least one second DL packet is transmitted by a second base station to the communication device.

Aspects of the present disclosure provide a mechanism for utilizing uplink hopping patterns for HARQ transmissions. Each hopping pattern may include a sequence of different frequency resources or a sequence of different scrambling sequences for a user equipment (UE) to utilize over time for HARQ transmissions. Each of the hopping patterns may further be associated with a time index mode in which the hopping pattern is applied to time resources such that each time resource within a consecutive sequence of time resources is mapped to a different frequency resource or scrambling sequence. The base station may select a hopping pattern for a particular UE and transmit an indication of the selected hopping pattern to the UE.

The present disclosure provides a hybrid automatic repeat request HARQ feedback method and apparatus. The hybrid automatic repeat request HARQ feedback method includes the steps: configuring target indication information for a terminal, wherein the target indication information is used to indicate frequency domain resource identification information corresponding to at least one first alternativefrequency domain resource; sending the target indication inforamtion to the terminal; and after sending a physical downlink shared channel (PDSCH) to the terminal, receiving an HARQ result, for the PDSCH, that is fed back by the terminal through the target frequency domain resource, wherein the target frequency domain resource is a frequency domain resource determined by the terminal to carry theHARQ result in the preset frequency domain resource and the at least first alternative frequency domain resource. The hybrid automatic repeat request HARQ feedback method may be performed in a communication system of an unlicensed spectrum, so that the terminal side may determine a target frequency domain resource for performing HARQ result feedback in the preset frequency domain resource and theat least second candidate frequency domain resource based on the target indication information configured by a base station.

Embodiments of the invention relate to methods and apparatus for link adaptation in a preceded MIMO system. According to one embodiment, there is provided a method for link adaptation in a precoded MIMO system. The method comprises: receiving first channel quality information γ_CQI; with respect to at least one layer r in a plurality of layers in a link; obtaining a Hybrid Automatic Repeat Request (HARQ) scaling factor μ_r that is associated with a HARQ feedback; and interpreting the first channel quality information γ_CQI into second channel quality information {circumflex over (γ)}_r based on at least the HARQ scaling factor μ_r, wherein the second channel quality information {circumflex over (γ)}_r is for adapting the at least one layer r in the plurality of layers. According to another embodiment, there is provided an apparatus for link adaptation in a precoded MIMO system.

A network sends data blocks in a first/n1h radio frame having a first configuration of uplink to downlink transmission time intervals TTIs. Each of these data blocks originate a separate hybrid automatic repeat request HARQ process. The network then frequency or spatially mutliplexes first re-transmissions of at least two of the data blocks in at least one TTI of a sequentially next second/(n+l)st radio frame having a different second configuration of uplink to downlink TTIs. If necessary second re-transmissions of the HARQ processes can also be similarly multiplexed in a TTI of a third/(n+2)nd radio frame sequentially next after the second/(n+l)st frame. In the examples, if frequency domain multiplexing the frequency mutliplexed first re-transmissions are separately scheduled; or if spatial domain multiplexing the spatially mutliplexed first re-transmissions are scheduled with a single physical downlink control channel PDCCH.

The invention discloses an HARQ (Hybrid Automatic Repeat reQuest) feedback method, a terminal and a network device. The method comprises the following steps: acquiring DCI (Downlink Control Information) in a GC-PDCCH (Group Common Physical Downlink Control Channel-Physical Downlink Control Channel); and performing HARQ acknowledgement information feedback according to the DCI. After the terminal misses the feedback position specified by the network device, the feedback of the HARQ acknowledgement information can be triggered according to the DCI, and the normal operation of the HARQ acknowledgement information feedback process is ensured. Furthermore, the DCI is carried in the GC-PDCCH, HARQ acknowledgement information feedback of a plurality of terminals can be triggered at the same time,and the overhead of the DCI is saved.

Provided are a method, user equipment and device for adjusting a serving grant value of user equipment, which can increase the interference control accuracy of the network side. The method comprises: first user equipment receiving a relative grant command sent by the network side; the first user equipment determining a first time interval, the first time interval being a transmission time interval of a first hybrid automatic repeat request HARQ process in which the relative grant command takes effect; the first user equipment adjusting a serving grant value according to the power ratio of a data channel to a control channel stored in the first user equipment and the relative grant command; and when the power ratio of the data channel to the control channel stored in the first user equipment comprises the first transmission time interval of the first HARQ process, all the current HARQ processes of the first user equipment sending the power ratio of the data channel to the control channel used by data at a preset number of first transmission time intervals. The embodiments of the present invention are applied to the technical field of communications.

The present disclosure provides a method, a terminal, and a base station for transmitting HARQ feedback information, where the method includes: acquiring preset downlink hybrid automatic repeat request HARQ configuration information, where the preset downlink HARQ configuration information is used to notify the terminal target The downlink control signaling is used to carry the HARQ feedback information of the at least two uplink data transmissions of any terminal; and the target downlink control information is determined according to the preset downlink HARQ configuration information. And obtaining the target downlink control signaling of the terminal according to the feature information, and parsing the target downlink control signaling to obtain HARQ feedback information of at least twouplink data transmissions. In the present disclosure, the base station may transmit HARQ feedback information for multiple uplink data transmissions of one terminal by using target downlink control signaling, thereby saving system signaling overhead.

A method for implementing hybrid automatic repeat request HARQ retransmission in enhanced multimedia broadcast multicast service E-MBMS using unicast link is disclosed. The method includes the following steps: a user terminal detects the E-MBMS packets transmitted from at least one base station; when the user terminal cannot restore the E-MBMS packets, the user terminal selectively reports a negative acknowledge NACK for the E-MBMS packets to its service base station using unicast uplink; after the service base station receives the negative acknowledge NACK for the E-MBMS packets from the user terminal, the service base station selectively retransmits the E-MBMS packets to the user terminal using unicast downlink.

The invention provides a hybrid automatic repeat request HARQ method used for facilitating uplink transmission. The HARQ method is characterized in that according to the uplink transmission, at least three HARQ feedback states can be defined to indicate a HARQ retransmission mode of the uplink transmission; and at least three HARQ feedback states comprise non-transmission DTX states of HARQ feedback information. The invention also provides a method for executing the HARQ feedback and transmission respectively on a base station and a user equipment according to the at least three HARQ feedback states. The invention also provides a corresponding device.