59results about How to "Improve reception reliability" patented technology

A data transmitting/receiving apparatus and method using an antenna array in a mobile communication system. A Node B measures a transmission status of each transmission antenna, classifies transmission data according to priority, and transmits to a UE high-priority data through a transmission antenna at a relatively good transmission status and low-priority data through a transmission antenna at a relatively poor transmission status.

The present invention relates to a method for transceiving downlink control information in a wireless access system that supports an enhanced physical downlink control channel (e-PDCCH), and to an apparatus for the method. More particularly, the method comprises the steps of: precoding downlink control information using a precoding matrix set in a terminal; and transmitting the precoded downlink control information to the terminal via the e-PDCCH using multiple antennas, wherein the e-PDCCH is multiplexed with a PDSCH in a first slot of a subframe in which the downlink control information is transmitted.

Methods and apparatus are described for a User Equipment (UE) to transmit HARQ-ACK information in a Physical Uplink Shared CHannel (PUSCH) in response to a reception of at least one Transport Block (TB) when the UE is configured by a base station with multiple DownLink (DL) Component Carriers (CCs), for selecting a single PUSCH for transmitting of Uplink Control Information (UCI), when the UE has multiple PUSCH transmissions, for improving the reliability of the HARQ-ACK reception when it is encoded using a block code relative to when it is encoded using the repetition code, and for applying transmission diversity to the HARQ-ACK transmission in a PUSCH.

A wireless communication network uses a shared packet data channel to broadcast information intended for all or a subset of the mobile stations monitoring the shared channel, based on using an associated packet data control channel to identify which shared channel transmissions comprise broadcast information rather than mobile-specific packet data traffic. For example, in a 1xEV-DV wireless communication network, a base station system can be configured to send broadcast messages on a Forward Packet Data Channel (F-PDCH) based on identifying those broadcasts via an associated Forward Packet Data Control Channel (F-PDCCH). In one such embodiment, one or more Medium Access Control (MAC) IDs are designated as broadcast identifiers. Thus, the receipt of a broadcast MAC ID in one or more timeslots of the F-PDCCH by a mobile station indicates to that mobile station that the corresponding timeslot(s) on the F-PDCH carry broadcast information rather than mobile-specific packet data traffic.

An apparatus and method for transmitting and receiving data in a communication system are provided. A serving node includes a transceiver/receiver including an antenna for transmitting and receiving data from at least one of plurality of customer equipments; a control processor responsive to an requesting handover message indicating handover to a target node for transmitting to the target node a sequence number message wherein the sequence number message has successfully received by the customer equipment; a memory for storing data to be transmitted to the customer equipment.

A method is provided a wireless system for reliably transmitting context information in robust header compression at low signal energies. More particularly, the methodology of the invention provides an elongated virtual Transmission Time Interval (Super TTI) for the first few (in particular, the first) non-compressed packet (that includes upper layer headers) of a packet stream transmitted using ROHC compression. Improved reception reliability for the uncompressed packet, in particular to decode the headers, results by application to the Super TTI of a combination of TTI Bundling techniques, RLC segmentation and association with multiple HARQ processes and use of enough HARQ rounds.

An interleaving method to which time-first-mapping is applied for a plurality of channel-coded and rate-matched code blocks considering a modulation scheme in a mobile communication system is provided. The interleaving method includes determining sizes of a horizontal area and a vertical area of an interleaver memory, selecting a defined number of adjacent coded symbols in a same code block according to a modulation scheme, generating modulation groups in a vertical direction, sequentially writing the modulation groups in the horizontal area on a row-by-row basis, and sequentially reading the symbols written in the interleaver memory on a column-by-column basis.

The invention relates to a multi-hop routing cooperation method of a wireless network and a realization apparatus thereof. The method comprises the following steps that: after a route is established, a common neighbor node between a first host node and a second host node on the route is taken as a cooperative node, and an end-to-end diversity gain and an end-to-end interruption probability between the first host node and the second host node are obtained during cooperation of the cooperative node; a common neighbor node between the second host node and a third host node on the route is taken as a cooperative node, and an end-to-end diversity gain and an end-to-end interruption probability between the second host node and the third host node are obtained during cooperation of the cooperative node; a common neighbor node between the first host node and the third host node on the route is taken as a cooperative node, and an end-to-end diversity gain and an end-to-end interruption probability between the first host node and the third host node are obtained during cooperation of the cooperative node; and node segmentation modes are determined as one-hop node segmentations having corresponding cooperative nodes or two-hop segmentations having corresponding cooperative nodes with utilization of the obtained diversity gains and interruption probabilities.

A transmitting/receiving apparatus and method for packet retransmission in a mobile communication system. Upon request for a retransmission from a receiver, a transmitter generates first coded bits by inverting initially transmitted coded bits, generates second coded bits by separating the initially transmitted coded bits into a first bit group having a relatively high priority and a second bit group having a relatively low priority and exchanging the first bit group with the second bit group, and generates third coded bits by inverting the exchanged coded bits. The transmitter selects one of the first coded bits, the second coded bits according to the sequence number of a retransmission request received from the receiver, and the third coded bits and maps the selected coded bits to modulation symbols. The transmitter then transmits the modulation symbols to the receiver.

The invention provides an enhancement method and device of random access channel-less (RACH-less) switching, a base station and a terminal. The problem that a RRC connection reconfiguration completionmessage and subsequent uplink data are hard to be reliably received if the error adjusting is not performed on TA (timing advance) of UE when the TA measured by the UE is in error in the RACH-less witching process is solved. The method comprises the following steps: measuring a TA adjusting value according to an acquired transmission signal for transmitting the RRC connection reconfiguration completion message if the radio resource control RRC connection reconfiguration completion message sent by the terminal is successfully acquired in the RACH-less switching process; sending the measured TAadjusting value to the terminal, thereby enabling the terminal to adjust the TA measured by the terminal according to the TA adjusting value, therefore, the error of the UE TA can be adjusted, the receiving reliability of the RRC connection reconfiguration completion message is improved, and then the receiving reliability of the subsequent uplink transmission data of the UE is improved.

The invention relates to a frequency hopping signal polarity diversity merging method. The method comprises the following steps: firstly, carrying out AD sampling on signals received by levorotation and dextrorotation rotation polarizing antennas, and obtaining two paths of baseband signals after digital down conversion; then carrying out conjugate multiplication on the levorotation and dextrorotation baseband signals, performing FFT conversion to obtain a frequency offset estimated value and a phase offset estimated value of the levorotation baseband signal, and correcting the deviation to accomplish the open loop correction of the levorotation branch; and finally carrying out weighted merging on the corrected baseband signal to accomplish the polarity diversity merging of frequency hopping signals. The invention provides a frequency hopping signal polarity diversity merging processing method, in which the frequency offset and phase offset of two paths of signals are processed in real time in an open loop control mode, compared with the closed loop control mode, the method has the advantages of simple structure, high processing speed and the like, and the method is very suitable for receiving frequency hopping telemetering signals to realize an optimal transmission signal-to-noise ratio.

The invention discloses a sending and receiving method and device of a physical downlink control channel, equipment and a base station. The sending method comprises the following steps: receiving configuration information of the physical downlink control channel by the base station, wherein the configuration information comprises that the base station configures the physical downlink control channel for transmission with the maximum repetition frequency N, N is a positive integer, and N is greater than or equal to 2; correspondingly and repeatedly receiving the physical downlink control channel for multiple times according to the configuration information; and combining the repeatedly received physical downlink control channels for multiple times to serve as receiving results of the physical downlink control channels. By adopting the scheme, the transmission reliability of the physical downlink control channel can be improved.

Frame-based information is transmitted through a transmission medium, whilst assigning payload information of a particular frame to one or more transmission packets and encrypting the payload information of such frame through a frame encryption key. Each transmission packet is provided with individual streamcipher-based synchronization information for in combination with the frame decryption key enabling decrypting of an associated encrypted transmission packet. In particular, the streamcipher-based synchronization information is transmitted as being redundantly included in a second transmission packet that is next to the first transmission packet that originates the individual streamcipher-based synchronization information in question. Thereby, the streamcipher-based synchronization information can operate as seed information for decrypting the second transmission packet.

The invention provides a large scale channel parameter indication method, a large scale channel parameter determination method, a base station and a terminal. The problem that in the prior art, a receiving end cannot determine large scale channel parameters related to downlink receiving is solved. The indication method provided by the invention comprises the steps of determining first transmissionresources related to transmission channels for one or a group of large scale channel parameters, and sending configuration information of the first transmission resources to the terminal through first signals, wherein the first transmission resources are the transmission resources of K downlink reference signals, and the K is a positive integer; and selecting second transmission resources in thefirst transmission resources according to transmission parameters employed by the transmission channels, sending indication information of the second transmission resources to the terminal through second signals, wherein the second resources are the transmission resources of L downlink reference signals, the L is a positive integer, and the K is greater than or equal to the L. According to the methods, the base station and the terminal, the terminal can determine corresponding receiving beams according to the large scale parameters of the transmission channels, and the receiving reliability ofthe terminal is improved.

The present disclosure relates to a method for controlling the power of a terminal in device-to-device (D2D) communication and, particularly, to a device and a method for supporting Type 1 discovery or Mode 2 D2D communication. The present disclosure relates to a method for controlling the transmission power of a terminal performing D2D communication, and the terminal, the method comprising the steps of: selecting an arbitrary resource in a discovery period for D2D resource selection; determining whether the selected resource satisfies a preset transmission power control condition; and transmitting information for the D2D communication through the selected resource, by using the power determined according to the determination result. The present disclosure relates to a communication scheme for fusing IoT technology with a 5G communication system for supporting a data rate higher than that of a 4G system and subsequent systems thereafter. The present disclosure can be applied to intelligent services (for example, a smart home, a smart building, a smart city, a smart or connected car, healthcare, digital education, retail business, security and safety related services, and the like) on the basis of the 5G communication technology and IoT related technology.

A method for receiving broadcast radio signals in a vehicle, particularly in a motor vehicle, and a broadcast radio receiver that is set up to perform the method are described. The method involves multiple reception paths of a broadcast radio receiver being available in order to receive and computationally process broadcast radio signals separately from one another. In addition, the method involves multiple reproduction appliances being connectable to one or more respective reception paths in order to reproduce received broadcast radio signals, wherein multiple reception paths can be combined for a reproduction appliance in order to improve the reception quality. Provision is additionally made for the speed of the vehicle to be ascertained and for the number of reception paths that are combined for a reproduction appliance to be prescribed on the basis of the speed of the vehicle.

The invention discloses an emission diversity device compatible with a digital terrestrial multimedia broadcast (DTMB) system and a data processing method thereof, which relate to the technical field of digital television, and aim to solve the technical problem of improving the receiving reliability in a multi-path transmission environment. A frame header module in the device outputs frame headers in two structures, a multi-input single-output (MISO) processing module processes the input data in two paths; a first path is processed according to a traditional DTMB method and forms a signal frame with a first frame header output by the frame header module, then is converted into a radio frequency signal sequentially through a base band post-processing module and an upper variable frequency module, and is transmitted from a radio frequency output antenna; and a second path first carries out improving Alamouti coding to the input data, then carries out inverse fast fourier transform (IFFT) and forms a frame body through a frame body processing module, forms the signal frame with a second frame head input by the frame header module, and then is converted into the radio frequency signal sequentially through the base band post-processing module and the upper variable frequency module and is transmitted through the other radio frequency output antenna. The device and the method provided by the invention have backward compatibility.

The invention relates to a microwave mixer which comprises a filter bank circuit, a medium-frequency filter amplification circuit, a microwave mixer circuit and a local oscillation source circuit. The input end of the microwave mixer circuit is connected with the output end of the filter bank circuit and the output end of the local oscillation source circuit, and the output end of the microwave mixer circuit is connected with the input end of the medium-frequency filter amplification circuit. Medium-frequency output is made to be a frequency band, the subsequent modules are reasonably utilized for signal conversion, the purpose of miniaturization is achieved, the size of the microwave mixer is greatly reduced, reliability of receiving of microwave radio frequency signals is improved, and usability of the microwave mixer is improved.