16 results about "Frequency division duplex" patented technology

A radio frequency module includes a transmit amplifier configured to amplify a transmit signal a receive amplifier configured to amplify a receive signal. The radio frequency module further includes at least one duplexer configured for operation in a frequency division duplex band having a transmit band and a receive band and further configured to filter the transmit signal to pass the transmit band and to filter the receive signal to pass the receive band. The at least one duplexer is coupled to the transmit amplifier via a first node and to the receive amplifier via a second node. A series acoustic resonator directly can be connected to the second node to increase a receive impedance of the at least one duplexer across the transmit band of the at least one duplexer.

A node configured to support a method of communicating between two nodes in the unlicensed spectrum is disclosed where a channel can be simultaneously used for downlink and uplink communication. The method performed at a node involves assessing at that node, for example, a UE, that there is a transmission to be made to a further node, for example a gNB. The first node receives an indication that communication with the further node is supported on a channel within an unlicensed spectrum using flexible frequency division duplex (FDD) techniques. The first node determines whether transmission by the further node is being made within a first portion of the channel within the unlicensed spectrum; and if so, transmits to the further node within a second portion of the channel which does not overlap with the first.

This application discloses a self-adjusting method and communication system for optimizing the coexistence of multiple communication modules in frequency division duplex mode. The method operates in a communication system with at least two communication modules. The system first operates in time-division duplex mode, acquiring communication data from at least two communication modules and establishing a benchmark comparison value for the system operating in frequency division duplex mode. The system then enters a parameter adjustment phase, acquiring the radio frequency parameters of at least two communication modules. Based on the benchmark comparison value, key performance indicators (KPIs) are periodically monitored. The frequency division duplex adjustment process is evaluated and halted based on one or more reference indicators to confirm whether the radio frequency parameters of at least two communication modules need adjustment, ultimately obtaining a set of radio frequency parameters suitable for the communication system operating in frequency division duplex mode.

The invention provides user equipment, a control method and a processing module thereof. The user equipment includes a radio frequency front end (RFFE) module and a processing module. The radio frequency front end module comprises a first transmission path and a second transmission path. The first transmission path is a time division multiplexing (TDD) path. The second transmission path is a frequency division multiplexing (FDD) path or another TDD path. The processing module is configured to control the RFFE module. The special time slot for TDD transmission on the first transmission path comprises at least one downlink symbol, at least one uplink symbol and at least one protection symbol. During the period of the protection symbol, the first transmission path is controlled to be in a TDD receiving state for executing TDD downlink transmission or in a TDD sending state for executing TDD uplink transmission.

The application discloses a kind of calculation methods of PDSCH physical bit number under frequency division duplex mode, belong to wireless network technical field, first 10 subframes of each frame is divided into 3 kinds of situations, respectively subframe 0, subframe 5 and other subframes;Then in subframe 0, subframe 5, according to the position of PDSCH resource block relative to PBCH and synchronization signal, the position of PDSCH resource block is divided into five kinds of situations;Finally, in each kind of situation, according to the different values of global MIMO configuration parameter, different PDSCH physical bit number calculation formula is designed.The application gives the closed explicit formula for calculating physical bit number based on the relationship between the parameters of physical layer and PDSCH physical bit number.

A method performed by user equipment, UE, includes receiving a DL reception and transmitting an UL transmission, wherein there is a collision between the DL reception and the UL transmission. The method also includes prioritizing for processing the DL reception or the UL transmission by applying a particular prioritization rule of a plurality of prioritization rules depending upon a type of the DL reception and / or the UL transmission. The method further includes processing the DL reception or the UL transmission in response to applying the particular prioritization rule.

Some aspects include an apparatus, method, and computer program product for radio resource management measurement prioritization for reduced capacity (RedCap) user equipment (UE). A RedCap UE may be use Half-Duplex Frequency Division Duplex (HD-FDD) for wireless communications. When performing communications with a network, the RedCap UE may make several measurements, including Reference Signal Received Power (RSRP), Signal to Interference and Noise Ratio (SINR), and Reference Signal Received Quality (RSRQ) measurements. To obtain these measurements, the RedCap UE may measure Synchronization Signal Block (SSB), Received Signal Strength Indicator (RSSI), and / or Channel State Information Reference Signal (CSI-RS) symbols. Difficulties may arise when a RedCap UE's serving cell signal timing is not synchronized with a neighboring cell. The RedCap UE may be configured to prioritize measurements over uplink transmissions. This prioritization may also include symbol buffers so that an overlap in uplink transmissions does not occur during a measurement.

A terminal includes a communication unit configured to perform communication based on half-duplex frequency division duplex; and a control unit configured to perform a first process and a second process, the first process being performed to determine a signal to receive or a signal to transmit when a downlink signal and an uplink signal overlap in a time domain during the communication, and the second process being performed to determine the signal to transmit when a plurality of uplink signals overlap in the time domain during the communication. In this terminal, the control unit determines whether to perform the first process or the second process first, and the communication unit receives or transmits a signal that is obtained based on a result of performing at least one of the first process and the second process.

Provided in the embodiments of the present application are a communication method for a frequency division duplex system, and a communication apparatus, which can send and receive sensing signals in a downlink frequency band, thereby implementing a radar sensing function. The communication method comprises: sending a first sensing signal by means of a downlink frequency band, and then receiving a second sensing signal by means of the downlink frequency band; converting the second sensing signal into a first digital signal; and on the basis of the first digital signal, performing radar sensing.

Beamforming in radio frequency (RF) communication systems using frequency division duplexing (FDD) are provided. In certain embodiments, a front end system includes a first transmit path configured to process a first radio frequency transmit signal of a frequency band, the transmit path including a power amplifier and a transmit filter having a passband that passes an uplink frequency range of the frequency band, and a receive path configured to process a first radio frequency receive signal of the frequency band. The receive path includes a low noise amplifier, a switch, and a receive filter having a passband that passes a downlink frequency range of the frequency band, and the switch has a first state in which an input of the low noise amplifier is coupled to the receive filter and a second state in which an output of the power amplifier is coupled to the receive filter.

Embodiments of the present application disclose a spectrum resource sharing method, a base station and a computer readable storage medium, which are used to improve the utilization of spectrum resources in a frequency division duplex spectrum sharing scenario. The method of the embodiments of the present application comprises the following steps: a base station acquires the number of radio resource control (RRC) connected users of an LTE cell; when the number of RRC connected users is equal to 0, the base station punches the PCFICH and PHICH occupied by the LTE system in a subframe, and maps the downlink service data of the NR system to the first target RE in the subframe, wherein the first target RE is an RE in symbol 0 of the subframe which is not occupied by the reference channel of the LTE system.

A limited-capability user equipment (RedCap UE) can decode configuration information received from a gNodeB (gNB) to configure the RedCap UE for UL sounding reference signal (UL SRS) transmission for positioning with transmit frequency hopping. The RedCap UE can determine whether to drop the UL SRS transmission based on a priority rule if any one or more symbols of the UL SRS transmission would collide with an uplink channel transmission, including a switching time for switching to or from an active bandwidth portion. If it is determined that the UL SRS transmission is to be dropped, the RedCap UE can drop one or more symbols of the UL SRS transmission that would collide and transmit any symbols of the UL SRS transmission that do not collide with the uplink channel transmission. The RedCap UE can be a half-duplex (HD) frequency division duplex (FDD) RedCap UE and can perform transmit frequency hopping over a bandwidth greater than the RedCap UE's maximum bandwidth.

The embodiment of the invention provides a communication method and a communication device of a frequency division duplex system, which can send and receive a sensing signal in a downlink frequency band so as to realize a radar sensing function. The communication method comprises the steps that after a first sensing signal is sent through a downlink frequency band, a second sensing signal is received through the downlink frequency band, the second sensing signal is converted into a first digital signal, and radar sensing is carried out according to the first digital signal.

Disclosed are methods, systems, and computer-readable medium to perform operations including: determining a scheduling conflict between an uplink transmission and a downlink reception; determining a type of the scheduling conflict; and applying, based on in part on the type of the scheduling conflict, a prioritization rule that prioritizes at least a portion of the uplink transmission or the downlink reception in order to mitigate the scheduling conflict.

A method performed by user equipment, UE, includes receiving a DL reception and transmitting an UL transmission, wherein there is a collision between the DL reception and the UL transmission. The method also includes prioritizing for processing the DL reception or the UL transmission by applying a particular prioritization rule of a plurality of prioritization rules depending upon a type of the DL reception and / or the UL transmission. The method further includes processing the DL reception or the UL transmission in response to applying the particular prioritization rule.

Methods, systems, and computer-readable media for performing operations including determining a scheduling conflict between an uplink transmission and a downlink reception, determining a type of the scheduling conflict, and applying a prioritization rule based in part on the type of the scheduling conflict that prioritizes at least a portion of the uplink transmission or the downlink reception in order to mitigate the scheduling conflict are disclosed.