30 results about "Guard time" patented technology

This application discloses a random access preamble configuration method applicable to a satellite network and a communication apparatus. In the method, a random access preamble location offset and duration of a PRACH occasion can be flexibly configured based on features of a satellite system. The method includes: A receiving apparatus receives first indication information, where the first indication information includes indication information used to identify the random access preamble location offset at the physical random access channel PRACH occasion. The receiving apparatus transmits a random preamble based on the first indication information, where the random preamble includes a sequence part and a guard time. Because a communication distance is relatively long and a transmission delay difference between users is relatively large in a satellite communication system, time domain resources occupied by the PRACH occasion can be minimized by using this method.

Systems, methods, and instrumentalities are disclosed herein associated with timing alignment in duplex. A wireless transmit / receive unit (WTRU) may be configured to determine a guard time period. The WTRU may receive information related to a grant allocation. The grant allocation may begin at a time associated with a number of starting symbol(s) within a subband. The WTRU may determine that the time associated with the number of starting symbol(s) is within the guard time period. The WTRU may calculate the difference between the time associated with the number of starting symbols and the start time of the guard time period. The WTRU may determine to puncture a part of the transmission that uses the grant allocation based on the size of the difference between the time associated with number of starting symbol(s) and the start time of the guard time period.

A system for configuring a Time Division Duplexing (TDD) configuration in an Open Radio Access Network (O-RAN) is disclosed. The system includes a set of Service Management and Orchestration (SMO) devices comprising a first SMO device, a second SMO device, and a governing SMO device. The governing SMO device receives respective Open Radio Unit (O-RU) location information and O-RU deployment information from each of the first and second SMO devices. The governing SMO device determines a distance between a first base station and a second base station. The governing SMO determines a propagation delay corresponding to a guard time based on the distance. The governing SMO determines a recommended Time Division Duplexing (TDD) configuration based on the guard time. The governing SMO communicates the recommended TDD configuration to at least one of the first SMO device or the second SMO device.

Methods, systems, and devices for wireless communication are described. For multiple passive devices, a reader device may configure guard time durations outside of one or more respective access occasions, whereas when communicating with a single passive device, a reader device may define guard time durations at boundaries within each respective access occasion of the passive device, where guard time durations may also increase with time. A reader device may further split resources to make room for forward link transmissions and additional backward link, or backscatter, communications, or may increase access occasions over time. Guard time durations or access occasions may be defined to increase by a quantity of time intervals in accordance with a defined pattern at one or more defined times. Additional signaling and configurations may be defined for reader devices and passive devices, including dynamic or defined configurations for guard time durations, access occasions, or ambiguity windows.

Rangeless failover in Passive Optical Network (PON) protection switching is implemented by an Optical Line Terminal (OLT) that includes a transmitter configured to connect a plurality of Optical Network Units (ONUs) on a downstream channel; a receiver configured to connect the plurality of ONUs on an upstream channel; and circuitry communicatively coupled to the transmitter and the receiver, wherein the circuitry is configured to, responsive to protection switch from a primary OLT, enable the transmitter on the downstream channel, and utilize a Dynamic Bandwidth Assignment (DBA) function on the downstream channel with a guard time that includes a normal guard time plus a differential time added thereto. The guard time is larger than a guard time used by the primary OLT prior to the protection switch. The differential time can be based on a differential between a closest ONU and farthest ONU, relative to the primary OLT, prior to the protection switch.

The invention provides an integrated control method and system based on a whole satellite control macro instruction, and the method comprises the steps: generating a macro instruction in a unified format, and the macro instruction comprises a header, segment information and an auxiliary package; uploading the macro instruction to a satellite integrated electronic system; analyzing the macro instruction, and dynamically scheduling a task queue according to task analysis time in the header; when the task is executed, cooperative operation of the associated subsystems is automatically triggered, and the cooperative operation comprises attitude and orbit control pointing, load startup and shutdown, solid memory recording or playback and link establishment; task conflicts are processed through a task queue conflict detection mechanism, the planned tasks cover the planned tasks of the same time window, and insertion of new tasks is shielded by the protection time window for the tasks in execution. According to the method, collaborative management and task scheduling of multiple subsystems such as satellite attitude and orbit control, load, solid storage and link are realized, the instruction complexity is remarkably reduced, and the whole satellite control efficiency and robustness are improved.

The present disclosure provides a guard period determination method and apparatus, and a guard period indication method and apparatus. The guard period determination method includes: determining a time domain range corresponding to an uplink subband for uplink transmission in downlink slots; and determining, based on indication information transmitted by a network device, a guard period before or in the time domain range. According to the embodiments of the present disclosure, the terminal can determine the time domain range, configured by the network device, corresponding to the uplink subband for uplink transmission in downlink slots, and determine, based on the indication information transmitted by the network device, the guard period before or in the time domain range. The terminal does not expect to receive downlink data and does not transmit uplink data in the guard period, but may instead perform the switching from downlink reception to uplink transmission, so as to ensure that the terminal has completed the switching by the time the terminal needs to perform the uplink transmission, so that the terminal can perform the uplink transmission in a timely manner, and interference with the uplink transmission caused by the occurrence of a delay in the uplink transmission is avoided.

Provided is a wireless communication device capable of reducing a guard time when performing TDD communication. The wireless communication device performs time division duplex (TDD) wireless communication. The wireless communication device comprises: a means for setting the duration of a transmission / reception period, in which a transmission period for transmitting a signal to a target device and a reception period for receiving a signal from the target device in TDD wireless communication come in succession, to the same duration as a round-trip delay time of a wireless signal between the wireless communication device and the target device; and a means for periodically performing transmission to the target device and reception from the target device by repeating the transmission / reception period.

The present invention discloses a time protection method, device and storage medium based on time synchronization card time calibration. The method creates a guard time, updates the guard time by monitoring an interrupt signal, and then determines whether the time of the time synchronization card has jumped or is abnormal by judging whether the guard time is consistent with the time of the time synchronization card, so as to determine whether to allow the system time to be calibrated using the time of the time synchronization card. Therefore, the present invention can solve the problem that when the time of the time synchronization card jumps, directly using the time of the time synchronization card to calibrate the system time causes the system time of the device to jump.

This invention belongs to the field of overload protection technology, and relates to an overload protection method for power devices based on energy integration. 2 The protection method includes step one: After the solid-state power controller starts working, the MCU periodically monitors the channel current I and simultaneously calculates the overload multiple M. I =I / I0; Step 2: Accumulate the heat value Q t Perform real-time calculations; Step 3: When Q t Not greater than the set protection threshold Q R When Q is active, disable the trip protection and return to step one; when Q is active... t Greater than the set protection threshold Q R When the overload tripping curve occurs, the circuit breaker is tripped, and the process returns to step one. This invention defines the essence of the overload tripping curve; the only parameter involved in the SSPC overload protection time calculation is the energy accumulation value Q. t Current overload factor M I It can determine the timing for trip protection.

The present invention transmits signals of many optical paths to an upper node by time-division multiplexing optical signals of many lower nodes using a single wavelength. The present invention suppresses a decrease in a transmittable band for each time slot due to an increase in the number of time slots to be statically allocated to each node with an increase in the number of optical paths. A shared time slot (16) which a plurality of lower nodes can use for transmission is prepared. An upper node regularly transmits an optical path header signal (15) including allocation information of the shared time slot and the plurality of lower nodes. Each lower node grasps the shared time slot allocated thereto from the allocation information of the optical path header, and transmits a time-division multiplexed optical signal at the timing when the corresponding shared time slot is in an empty state. The lower node that performs transmission transmits a shared timed slot state signal indicating the state of the corresponding shared time slot in a guard time interval (17). The upper node can designate an ID of a priority node capable of preferentially using the corresponding time slot among the plurality of lower nodes allocated to each shared time slot. The lower nodes other than the priority node wait for transmission until the time slot comes into an empty state.

Aspects of the present disclosure relate generally to initial access in shared spectrum. Some aspects more specifically provide two-step random access channel (RACH) procedures for spectrum sharing. For example, some aspects provide indication of whether a first message of a two-step RACH procedure is associated with a first operator or a second operator. In some examples, the indication may include an explicit indication of subscription information of a user equipment transmitting the first message. In some other examples, the indication may be implicit, for example, in a physical-layer configuration of the first message. Some aspects provide a channel structure for the first message with adjustable guard times, guard periods, and transmission gaps. Some aspects provide a second message of the two-step RACH procedure that includes an indication of whether the second message is associated with a first operator or a second operator.

The application provides a long-term guarding power supply system and a management and control method, which comprises a thermal battery, a low-power management and control module and a load. The thermal battery is connected with the low-power management and control module and the load. When the low-power management and control module receives an execution task signal, the thermal battery supplies power for the low-power management and control module and the load. The low-power management and control module is connected with the thermal battery and the load. During the guarding process, the low-power management and control module receives a wake-up signal, performs self-checking and other operations on the long-term guarding power supply system according to the received flow, and activates the thermal battery when the execution task signal is received. The load is a load for executing related tasks. The application prolongs the guarding time of the long-term guarding device, which can be up to several years, and realizes safe and reliable long-time guarding and task completion.

The invention provides a communication method and device, network equipment and terminal equipment. The communication method applied to network equipment comprises the following steps: communicating with terminal equipment according to a first frame structure; wherein the first frame structure sequentially comprises a first time unit, second time units and a third time unit, the first time unit is configured as a downlink resource, the third time unit is configured as an uplink resource, each second time unit comprises the same number of time frequency units, the first time frequency unit is configured as a downlink resource, and the third time unit is configured as an uplink resource. The second time frequency unit is configured as an uplink resource. The network device can communicate with different types of terminal devices according to the first frame structure, so that the flexibility of network communication can be improved, the spectrum efficiency and the frequency utilization rate can be improved, and the user experience is improved. By setting the protection time frequency unit in the first frame structure or the network device does not schedule the terminal device on the target time frequency unit, the terminal device can be prevented from receiving and transmitting at the same time and at the same frequency.

Provided are a method by which an apparatus performs wireless communication, and an apparatus supporting same. The method may comprise: a step of acquiring information related to a guard time; a step of acquiring a first timing advance; and a step of reporting information related to the first timing advance. For example, on the basis of the gap between uplink and downlink resources associated with the first timing advance falling within the guard time, it may be determined that a collision would occur between the uplink and downlink.

The application provides a kind of relay protection system and method, comprising: the real-time current data of the inflow in the equipment to be protected is collected, and the real-time current data is converted into digital signal after A / D conversion;According to the current data after A / D conversion, the heat capacity is calculated, and according to the relay protection time under the setting of different multiple rated current, the integral value operation of current thermal effect is carried out, and the overcurrent inverse time limit action time is determined.The application realizes the relay protection of multiple systems based on microprocessor and other hardware circuits, the real-time current data of the protected equipment is collected by hardware device, and is converted into digital quantity after AD conversion, the calculation is carried out through microprocessor, according to the relay protection time set, integral operation is carried out, overcurrent inverse time limit action time is calculated, instantaneous operation of relay protection is realized, calculation precision is high, action is reliable, application is flexible, inverse time limit action time of different rated current multiple can be set according to needs, and the application range is wide.

The present invention discloses a vehicle-wide safety clock system based on a time synchronization protocol, wherein each node includes a clock publishing module, a clock protection module, a clock synchronization module, and a clock configuration management module; the clock publishing module publishes the corresponding clock reference and the functional safety status and information security status of the clock reference to other applications that require the clock reference; the clock protection module protects the functional safety integrity and information security integrity status of the time reference; the clock synchronization module obtains the configured clock source according to the clock identity configured in the clock configuration management module, switches the clock source according to the strategy, and synchronizes the time reference in the network using the time synchronization protocol; the clock configuration management module configures information of other submodules. The present invention proposes a vehicle-wide clock synchronization standardization module that can be quickly integrated and configured, and establishes a vehicle-wide clock synchronization mechanism that meets the safety goals of functional safety and information security.

To provide a radio communication device capable of reducing a guard time when performing communication of a TDD system.SOLUTION: A radio communication device performs radio communication of a TDD (time division duplex) system. The wireless communication device includes means for setting a time length of a transmission and reception period in which a transmission period for transmitting a signal to a target device and a reception period for receiving a signal from the target device in wireless communication of a TDD scheme are continuous to the same time length as a round-trip delay time of a wireless signal between the wireless communication device and the target device, and means for periodically performing transmission to the target device and reception from the target device by repeating the transmission and reception period.SELECTED DRAWING: Figure 10

The invention provides a beam hopping control method and device, electronic equipment, a storage medium and a program product, and relates to the technical field of communication. According to the method, optimal management of the beam hopping process is realized by setting the beam hopping protection time, so that the influence of the beam hopping on the communication quality can be remarkably reduced, and the method allows the system to complete the rapid adjustment of the beam within the specific beam hopping protection time without interfering with normal data transmission. Besides, the beam hopping protection time is determined based on the system frame structure, so that the flexibility and adaptability of the system are improved, and the system can adapt to different communication requirements and environmental conditions.

A distributed acoustic sensing (DAS) system that collects many frequency bands within the system (in particular, analog to digital converter, or ADC) bandwidth. The bands are divided into multiple groups, and within each group, the inter-band interference from band i to band j is at least l1 dB lower than the power of band j. For different groups, the inter-band interference is at least l2 dB lower than the power of band j, that l2≥l1+Cl, where Cl is a value related to round-trip fiber loss. The bands belonging to the same group are cascaded one after another, with little guard time in between, or packed back-to-back. This arrangement advantageously increases the overall signal power, resulting in an improved SNR.

This terminal comprises: a control unit that assumes that a guard time, which includes a waveform for which the value of power is zero or a prescribed value, is arranged at the head, the end, or the head and the end, of a pulse duration time of on / off modulation, in an orthogonal frequency division multiplexing symbol constituting a low-power wake-up signal; and a reception unit that detects and receives the low-power wake-up signal.

A system for determining a time division multiplexing (TDD) configuration for Citizen Broadband Radio Service Devices (CBSDs) as base stations is disclosed. The system determines a distance between a pair of base stations, where the distance is more than other distances between other pairs of base stations. The system determines a propagation delay between the identified first pair of base stations and communicates the propagation delay as a required guard time to the set of base stations. The system receives, from each base station among the set of base stations, a respective TDD configuration for signal communication. The system determines a common Time Division Duplexing (TDD) configuration that satisfies TDD configurations of more than a threshold number of base stations from among the set of base stations. The system authorizes a base station to use the common TDD configuration upon receiving a grant request.

This invention relates to an SSPC overcurrent protection time acquisition device and method, belonging to the field of solid-state power distribution testing technology. The device includes: a multi-voltage signal conditioning circuit (supporting 28V / 270V / 540V), a microcontroller status acquisition module, and a host computer high-precision timing system. The signal conditioning circuit converts the high-voltage signal into a low-level logic signal recognizable by the microcontroller through optocoupler isolation; the microcontroller detects the I / O port status changes (0x00 / 0x01) in real time and uploads the data to the host computer via serial port; the host computer calculates the protection time with microsecond-level accuracy based on the Stopwatch function. This invention solves the problems of high cost, low accuracy, and poor multi-voltage compatibility of traditional testing equipment, and features safe isolation, fast response, and high accuracy.

The invention relates to an end system adaptive time slot escorting and synchronous control method based on a Linux kernel. The method comprises the following steps: establishing a unified time reference of an end system based on a time service mechanism; based on a unified time reference and a secure transmission constraint condition, constructing an inner-layer schedule on a kernel side through a time-aware queue rule, forming outer-layer escort on a port side through a gating list, and constructing to obtain a double-layer time slot escort structure; and constructing an adaptive guard band and phase compensation control law based on the jitter state and the alignment error of the clock, and adaptively adjusting the guard time band and windowing phase compensation of the double-layer time slot escort structure based on the control law so as to realize adaptive time slot escort and synchronous control of the end system. In the prior art, jitter exists in a transmission process from an end system kernel to a physical port, which may cause transmission time slot border crossing; and the problems of drifting of a dispatch table, non-uniform corresponding relation between service priority and a time slot table and the like caused by master clock switching or time service lock losing are solved.

The present disclosure provides a method performed by user equipment in a wireless communication system for subband full duplex operation. The method comprises receiving a Time Division Duplexing uplink / downlink configuration indicating TDD UL / DL patterns for TDD periods, wherein TDD patterns indicate symbol type for each symbol in the TDD periods. The method comprises receiving scheduling for Physical Uplink Shared Channel repetition transmission. The method comprises obtaining invalid symbols for guard time when switching symbol types in PUSCH repetition transmission. The method comprises determining guard time allocations for switching symbol types in PUSCH repetition transmission based on invalid symbols. The method comprises determining actual repetitions according to the received indication and obtained invalid symbols. The method comprises transmitting the actual repetitions.

A wireless network access method includes: determining a system coverage radius according to system configuration information issued by a management station; acquiring an access parameter set, a cyclic prefix length, and a guard time interval length according to the system configuration information and the system coverage radius; determining a time domain structure of an uplink synchronization signal according to the access parameter set, the cyclic prefix length, and the guard time interval length; acquiring a unique cyclic shift size corresponding to each terminal station according to a unique identification number of each terminal station; generating an access sequence for each terminal station according to the access parameter set and the unique cyclic shift size; and performing subcarrier mapping on the access sequence and converting the access sequence after subcarrier mapping into a sequence time domain signal.

The present invention provides a time slot of a backward - compatible all - digital broadband communication system for the sea and its compatibility method. The time slot of the present invention includes a ramp - up time, a synchronization time, a link ID time, a valid data time, a ramp - down time, and a protection time; wherein: the time - slot structure composed of the ramp - up time, the synchronization time, the link ID time, the valid data time, the ramp - down time, and the protection time is adaptively adjusted according to the equipment and rate transmission requirements of the communication node. The compatibility method of the present invention includes: when the communication node is an AIS device, setting K = 1 and S = 1, and adjusting it to the AIS time - slot structure; when the communication node is a VDES device, setting K = 1 and S = 1, and adjusting it to the ASM time - slot structure; when the communication node is a VDES device, setting K = 1, S = 2 or S = 4 or S = 8, and adjusting it to the terrestrial VDE time - slot structure; The present invention can adaptively adjust the time - slot structure according to the communication rate, greatly improving the number of nodes and the communication rate of the marine communication network. At the same time, it is compatible with the second - generation AIS and the third - generation VDES communication networks, solving the problem of backward compatibility in marine communication.

An apparatus for a device for a wireless communication system, the apparatus including at least one processor, and at least one memory storing instructions that, when executed by the at least one processor, cause the device to: allocate resources for sensing based on a guard time between resources for downlink and uplink transmissions, perform sensing using the resources allocated for the sensing.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit a signal indicating a quantity of identifiers, each indicated identifier to transmit a response during a time domain window. The time domain window may include a quantity of sub-windows, where each sub-window is of equal duration. The UE may receive, from each identifier of the quantity of identifiers, a response in each sub-window, based on transmitting the signal. The time domain window may also include one or more guard time durations.