Abstract: Methods, systems, and devices for a two-step random access procedure in mobile communication technology are described. An exemplary method for wireless communication includes receiving, by a network node, a random access message that comprises at least one of a radio network temporary identifier (RNTI), an identity of the wireless device, an establishment cause, uplink control information (UCI) or beam information, and transmitting, to a wireless device, a contention resolution message, wherein at least a portion of the random access message is modulated using a first modulation scheme selected from a modulation group that comprises binary phase shift keying (BPSK) and ?/2-BPSK.

Abstract: Provided are a symbol sending method, a symbol receiving method, a sending device, a receiving device, and a storage medium. The symbol sending method includes the following: modulating two bits according to a model of a first constellation diagram to obtain a transmission symbol, where the model of the first constellation diagram satisfies the following: four vertices of the first constellation diagram form a rhombus, the lengths of the two diagonal lines of the rhombus are unequal, and each vertex corresponds to one value of the two bits; and sending the transmission symbol.

Abstract: Methods, systems, and devices for transmitter-side processing of preamble and reference signals are described. An exemplary method for wireless communication includes transmitting, by a wireless device, a message comprising modified symbols that are generated by performing a modification on baseline symbols. Another exemplary method for wireless communication includes receiving, by a network node, a message comprising modified symbols that are generated by performing a modification on baseline symbols. In an example, the message may be a random access message that is part of a 2-step random access channel (RACH) process or a contention-based physical uplink shared channel (PUSCH) or physical uplink control channel (PUCCH) transmission.

Abstract: Disclosed are a system and method for efficient nitrogen and carbon removal and phosphorus recovery of source-separated fresh urine by biochemical combination. The system includes a functionally zoned membrane aerated biofilm reactor for in-situ nitrogen and carbon removal, a source separation toilet, a source-separated urine storage tank, a phosphorus recovery reactor, a calcium salt solution tank, a water production tank, and a control system. The membrane aerated biofilm reactor is divided into an upper part and a lower part, a micro-aerobic environment is formed in the upper part while an anaerobic environment is formed in the lower part, and thus nitrogen and carbon can be removed only in the membrane aerated biofilm reactor. The system disclosed by the present disclosure can achieve the goal of removing nitrogen and carbon by 95% and more without additional carbon source, and can meet the demand of in-situ sewage treatment on a train.

Abstract: The present disclosure relates to systems and methods for determining abnormal information associated with a vehicle. The systems may perform the methods to obtain real-time information associated with a bicycle and obtain reference information associated with the bicycle. The systems may also perform the methods to determine, based on the real-time information and the reference information, abnormal information associated with the bicycle, and transmit the abnormal information associated with the bicycle.

Abstract: The present disclosure relates to systems and methods for determining abnormal information associated with a vehicle. The systems may perform the methods to obtain real-time information associated with a bicycle and obtain reference information associated with the bicycle. The systems may also perform the methods to determine, based on the real-time information and the reference information, abnormal information associated with the bicycle, and transmit the abnormal information associated with the bicycle.

Abstract: A system includes a storage device storing a set of instructions and at least one processor in communication with the storage device. When executing the instructions, the at least one processor is configured to cause the system to obtain a request to close a lock such that the lock is in a locked status, and actuate a control device to cause a locking mechanism of the lock to move toward a first position. The at least one processor may also cause the system to determine whether operation information of the lock satisfies a condition relating to an operation of the lock, and actuate the control device to cause the locking mechanism to move to the first position or a second position based on a result of the determination as to whether the operation information of the lock satisfies the condition.

Abstract: The present disclosure relates to systems and methods for determining abnormal information associated with a vehicle. The systems may perform the methods to obtain real-time information associated with a bicycle and obtain reference information associated with the bicycle. The systems may also perform the methods to determine, based on the real-time information and the reference information, abnormal information associated with the bicycle, and transmit the abnormal information to a server or a terminal device associated with the bicycle according to a Narrow Band Internet of Things (NB-IoT) technique or a Long Range (LoRa) technique.

Abstract: A method for vehicle sharing service may include obtaining, from a terminal device, a location of the terminal device via a network. The method may also include obtaining, from the terminal device, information associated with a vehicle, the information including an identifier of a short-range wireless communication module of the vehicle. The short-range wireless communication module may emit a short-range wireless signal. The information associated with the vehicle may further include an intensity of the short-range wireless signal determined by the terminal device. The method may further include determining a location area of the vehicle based on the location of the terminal device and the intensity of the short-range wireless signal.

Abstract: A virtual parking system may include a storage device that stores a set of instructions and a processor in communication with the storage device. When executing the set of instructions, the processor may be configured to cause the system to acquire a first geographical location associated with a virtual parking region and acquire, from a user terminal, a second geographical location via a communication unit of the virtual parking region. The processor may also be configured to cause the system to determine whether a distance between the first geographical location and the second geographical location is less than a threshold distance. The processor may further be configured to cause the system to, in response to a result of the determination that the distance is less than the threshold distance, transmit, via the communication unit, information associated with the virtual parking region to the user terminal.

Abstract: The present disclosure relates to systems and methods for determining abnormal information associated with a vehicle. The systems may perform the methods to obtain real-time information associated with a bicycle and obtain reference information associated with the bicycle. The systems may also perform the methods to determine, based on the real-time information and the reference information, abnormal information associated with the bicycle, and transmit the abnormal information to a server or a terminal device associated with the bicycle according to a Narrow Band Internet of Things (NB-IoT) technique or a Long Range (LoRa) technique.

Abstract: A method for vehicle sharing service may include obtaining, from a terminal device, a location of the terminal device via a network. The method may also include obtaining, from the terminal device, information associated with a vehicle, the information including an identifier of a short-range wireless communication module of the vehicle. The short-range wireless communication module may emit a short-range wireless signal. The information associated with the vehicle may further include an intensity of the short-range wireless signal determined by the terminal device. The method may further include determining a location area of the vehicle based on the location of the terminal device and the intensity of the short-range wireless signal.

Abstract: A method for unlocking a lock may include receiving, via a network, a first service request to unlock a lock from a terminal device. The first service request may be associated with a wireless connection between the lock and the terminal device. The method may also include transmitting, via the network, a password associated with the first service request to the terminal device and receiving an input associated with the terminal device. The method may further include determining whether the received input satisfies an unlocking condition and actuating, based on a result of the determination that the received input satisfies the unlocking condition, a locking mechanism to unlock the lock.

Abstract: A system includes a storage device storing a set of instructions and one or more processors in communication with the storage device. When executing the set of instructions, the processors are configured to cause the system to obtain information associated with a vehicle and a user that uses the vehicle via a network. The processors also cause the system to determine at least one behavior of the user based on the multimedia information. The processors also cause the system to generate at least one message in response to the behavior of the user, and transmit the message to the vehicle or a terminal device of the user via the network. The processors also cause the system to determine broadcast data based on the information. The processors also cause the system to transmit the broadcast data to the vehicle or the terminal device of the user via the network.

Abstract: A system includes a storage device storing a set of instructions and at least one processor in communication with the storage device. When executing the instructions, the at least one processor is configured to cause the system to obtain a request to close a lock such that the lock is in a locked status, and actuate a control device to cause a locking mechanism of the lock to move toward a first position. The at least one processor may also cause the system to determine whether operation information of the lock satisfies a condition relating to an operation of the lock, and actuate the control device to cause the locking mechanism to move to the first position or a second position based on a result of the determination as to whether the operation information of the lock satisfies the condition.

Abstract: A method for unlocking a lock may include receiving, via a network, a first service request to unlock a lock from a terminal device. The first service request may be associated with a wireless connection between the lock and the terminal device. The method may also include transmitting, via the network, a password associated with the first service request to the terminal device and receiving an input associated with the terminal device. The method may further include determining whether the received input satisfies an unlocking condition and actuating, based on a result of the determination that the received input satisfies the unlocking condition, a locking mechanism to unlock the lock.

Abstract: A method for unlocking a lock may include receiving, via a network, a first service request to unlock a lock from a terminal device. The first service request may be associated with a wireless connection between the lock and the terminal device. The method may also include transmitting, via the network, a password associated with the first service request to the terminal device and receiving an input associated with the terminal device. The method may further include determining whether the received input satisfies an unlocking condition and actuating, based on a result of the determination that the received input satisfies the unlocking condition, a locking mechanism to unlock the lock.