150 results about "Cell search" patented technology

Methods, systems, and devices for wireless communications are described. Generally, the described techniques enable a first wireless device to scramble at least a portion of one or more frequency-modulated continuous wave (FMCW) signals (e.g., hybrid FMCW signals) using a scrambling identifier, which may enable a second wireless device to differentiate between FMCW signals based on identifying the scrambling identifier. For example, the first wireless device may scramble at least a portion of an upchirp signal, a downchirp signal, or both, of an FMCW signal. The second wireless device may identify the scrambling identifier based on attempting to descramble the scrambled portion of the FMCW signal using multiple candidate scrambling identifiers. In some examples, a scrambling pattern (e.g., which portion of the upchirp signal, downchirp signal, or both, is scrambled) of a hybrid FMCW signal may indicate information associated with the first wireless device.

The invention discloses a satellite-borne space-based measurement and control method based on a non-ground network and related equipment. The method is used for a satellite-borne space-based measurement and control device, the satellite-borne space-based measurement and control device is arranged on a low-orbit satellite platform, and the method comprises the following steps: respectively obtaining real-time orbit parameters of a low-orbit satellite, GNSS positioning information and a pre-stored high-orbit satellite coverage information table; based on the current orbit parameter, the GNSS positioning information and a high-orbit satellite coverage information table of a high-orbit satellite pre-stored or periodically updated from a satellite service computer, calculating a space-time relationship between the low-orbit satellite and a cell coverage range; and under the condition that it is predicted and determined that the cell coverage of the target high-orbit satellite is about to enter according to the time-space relationship obtained through calculation, waking up in advance and initiating cell search and a control flow of accessing at any time. The problems that an existing space-based measurement and control technology is high in construction cost, limited in multiple access capacity and poor in dynamic adaptability can be solved.

A terminal for performing an initial cell access, according to an embodiment of the present disclosure, receives a PBCH signal of a first cell via a cell search, receives SIB1-scheduling information on a CSS set related to the PBCH signal, and determines whether to perform a remaining access procedure on the first cell, on the basis of the SIB1-scheduling information, wherein the terminal is a second type terminal in which the capability is reduced to support a bandwidth narrower than that of a first type terminal, and the terminal may determine, as the second type terminal, whether an access to the first cell is allowed, on the basis of the state of a bit reserved so as not to be used by the first type terminal within the SIB1-scheduling information.

A user equipment (UE), a base station, a baseband processor or other network device can operate to perform an initial access to a satellite base station (e.g., a non-terrestrial network (NTN) ). The UE can perform a cell search during the initial access on an NTN band based on one of a plurality of synchronization signal block (SSB) periodicities that each map to a different NTN band ID, respectively, where the UE is an idle or inactive mode. A number of candidate values of the SSB periodicities can correspond to a different NTN band ID, or NTN region ID, respectively, according to a predefined association in one or more data sets.

The invention discloses locomotive broadband data access equipment based on a core board and an implementation method, and belongs to the technical field of subway wireless communication. The working process is as follows: after a linux system of a core board is started, a hard disk is loaded, an LTE broadband data module and a 5G NR broadband data module are driven to carry out frequency search and cell search, authentication registration is carried out in a limited working frequency band, a special bearer is established, then a network is continuously detected, and the detection result is obtained. The LTE broadband data module and the 5G NR broadband data module of the equipment can operate in an online state at the same time. The data volume for bearing the communication service is greatly improved, and the real-time performance of communication is greatly improved.

The present invention relates to determine a common application time-base for different positionally fixed wireless stations, which perform a timing application in different unsynchronized radio-access-network cells, a method comprises providing to the wireless stations a timing-report instruction. It instructs the wireless stations to perform a cell-search procedure and to determine a respective set of time synchronization information retrieved from any detected base station with reference to its respective time base. If more than one set of time synchronization information from a corresponding number of detected base stations has been retrieved, the wireless stations provides timing synchronization data indicative of the retrieved sets of time synchronization information from the detected base stations. An application server receives the at least one timing report and determines a common application time-base for the different detected base stations, using the different sets of timing synchronization data provided.

In a wireless communication system, a user equipment (UE) may measure synchronization signal blocks (SSBs) to evaluate neighbor cells. A UE configured with multiple potential receive beams may conventionally measure one receive beam per SSB. A UE may improve the speed of receive beam measurements by performing measurements using demodulation reference signals (DMRS) of physical broadcast channel (PBCH) symbols, which occur twice per SSB. The UE may perform a cell search for neighbor cells available to the UE in a synchronized network to determine a number of the neighbor cells and timing information for each of the neighbor cells. The UE may measure one or more receive beams using the DMRs of the PBCHs of SSBs received from the neighbor cells. Each receive beam may be measured during a beam switch time unit including a PBCH symbol from each of the neighbor cells according to the timing information.

An arrangement for non-terrestrial communication networks, where a network node providing a cell transmits an indicator of upcoming change in the transmission of synchronization signals to a user equipment. Based on the received indicator the user equipment may determine whether to change the cell or to camp in the current cell. Similar indicator may be used during cell change procedure when determining whether to access the cell found in the cell search procedure or to re-initiate the cell search procedure for finding another cell.

Apparatuses, methods, and systems are disclosed for performing cell selection / reselection on a radio frequency associated with a network slice. One apparatus includes a processor and a transceiver that camps on a first frequency layer of a RAN while in a RRC idle state, the first frequency layer supporting a first set of network slices, where the first set of network slices is prioritized for use with a first frequency. The processor iteratively performs cell search on a second frequency layer while the apparatus is camped on the first frequency layer, the second frequency layer supporting a second set of network slices, where the second set of network slices is prioritized for use with a second frequency. The processor maintains in parallel the second frequency layer while in the RRC idle state.

One embodiment of the present disclosure relates to a device and a method for transmitting an uplink reference signal in an electronic device. The electronic device can include: a communication circuit for supporting a first bandwidth related to reduced capability and a second bandwidth greater than the first bandwidth; a processor; and a memory for storing instructions, such that when executed by the processor, the instructions instruct the electronic device to: identify whether a cell that does not support the reduced capability is present if a cell that supports the reduced capability is not retrieved through cell search; set the bandwidth of the electronic device to the second bandwidth if the cell that does not support the reduced capability is present; and, in response to the setting to the second bandwidth, access, through the communication circuit, the cell that does not support the reduced capability. Other embodiments are also possible.

Procedures, methods, architectures, apparatuses, systems, devices, and computer program products for network access in a wireless communications system using common signaling, such as synchronization signals, for multiple Radio Access Technologies (RATs). A wireless transmit / receive unit, WTRU, performs a cell search in the system, obtains first information indicative of whether spectrum sharing is configured in a cell discovered in the cell search and of available radio access technologies, RATs, in the discovered cell, in case the first information indicates that spectrum sharing is configured in the discovered cell, determines which of the of available RATs to access, obtains access configuration parameters for the determined RAT to access, and performs, using the access configuration parameters, a random-access procedure to access the RAT.

Techniques for performing a cell search for the presence of multiple cells in a frequency band are described. Each frequency band is segmented into sub-bands, each sub-band covering more than one raster scan (e.g., 100 kHz). Each segment has a predetermined center frequency for RF tuning. The number of tunable RF center frequencies can be equal to the number of segments in a frequency band. The techniques include obtaining IQ signals in a digital domain at a predefined RF center frequency. Further, the techniques include computing a matched filtering of PSS sequence with IQ samples of sub-bands with a predefined and predetermined waveform through matched filtering, and averaging correlations for smoothing the peaks that exceed a predetermined threshold to detect or reject the presence of a cell.

This disclosure describes schemes for initial cell search. Considering some scenarios, like NTN, where there are lower workable SNR and larger CFO. However, to ensure quick cell search in such scenarios, novel initial access procedure and schemes for synchronization block design and related issues are necessary. This disclosure proposes methods for enabling UE to quickly cell search and detect the synchronization signal and information, so that to ensure better communication system.

The invention discloses a wireless communication method and device, equipment and a storage medium, and relates to the technical field of communication. The method comprises: receiving an SSB sent by a network device in a first period, the first period being greater than or equal to 20 milliseconds (310). According to the method, the terminal equipment receives the SSB sent by the network equipment in the first period, the first period is larger than or equal to 20 ms, the SSB period is expanded to the first period, the terminal equipment can receive the SSB in the first period, cell search failure is avoided, and communication efficiency is improved.

Various solutions for optimal radio access technology (RAT) selection-based voice call fallback in mobile communications are described. The user equipment (UE) may receive a broadcast message from a serving cell. Specifically, the broadcast message is associated with an indication of quality of service (QoS) flow support for Internet protocol (IP) multimedia subsystem (IMS) communication service. Also, the UE may determine whether to initiate an inter-RAT cell or public land mobile network (PLMN) search based on the indication of QoS flow support for IMS communication service. As the voice call fallback can be performed by selecting the optimal RAT, the inefficiency and latency introduced by multiple, sequential fallback attempts can be prevented.

The invention discloses a cell searching method and device, communication equipment, a storage medium and a computer product. The method comprises the following steps: roughly scanning a data block received in a preset time window to position an area in which at least one synchronization signal block possibly exists; in the area, searching a main synchronization signal through a sliding window with frequency offset stepping, and establishing a main synchronization signal candidate list; secondary synchronization signal detection and cell identification calculation are carried out on primary synchronization signals in the primary synchronization signal candidate list to generate a cell candidate list; determining one synchronization signal block in each cell based on the cell candidate list; determining other synchronization signal blocks of one cell in the data block based on one synchronization signal block in one cell, and determining the strongest synchronization signal block in each cell; and reporting the cell list containing the information of the strongest synchronization signal block. According to the method, rough positioning and fine searching are combined, so that the calculation complexity and time of cell searching can be remarkably reduced.

A user equipment (UE) configured to determine, for each radio access technology (RAT) of a plurality of RATs, a first list of bands on which a public land mobile network (PLMN) is expected to be deployed and a second list of bands including bands not included in the first list, wherein the first list is determined based on a region where the UE is currently located and PLMN deployment information, select a search pattern for performing a cell search based on a current UE scenario, perform a first phase of the cell search and when the first phase of the cell search is unsuccessful and no cell is selected, perform a second phase of the cell search by either scanning frequencies included in the second list of bands for the first priority RAT or scanning frequencies included in the first list of bands for a second priority RAT.

Various aspects of the present disclosure relate to receiving (802) a cell discontinuous transmission and / or reception (DTX / DRX) configuration for a plurality of serving cells. Aspects of the present disclosure may involve receiving (804) a downlink control information (DCI) signal for at least a serving cell corresponding to the cell DTX / DRX configuration, wherein the DCI further includes an indication of cell shutdown. Aspects of the disclosure may further involve performing (806) a cell search based at least in part on the cell shutdown and the cell DTX / DRX configuration.

A user equipment (UE) in a cellular network can estimate a likelihood of a negative performance impact of modifying a duration of a paging cycle for the UE when operating in an idle mode. The UE then selectively modifies the paging cycle based on the estimated likelihood. In some cases, the UE determines the likelihood of the negative performance impact based upon a mobility mode of the UE, such as a stationary mode or a non-stationary mode. In some cases, the UE determines the likelihood of the negative performance impact based upon one or more deployment parameters such as a paging latency.

This disclosure describes schemes for synchronization block design and Time index indication. Considering some scenarios, like NTN, where there are lower workable SNR and larger CFO. However, to ensure quick cell search in such scenarios, novel schemes for synchronization block design and Time index indication are necessary. This disclosure proposes methods for enabling UE to quickly cell search and detect the synchronization signal and information, so that to ensure better communication system.

A method, a device, and a non-transitory storage medium are described in which a frequency and network slice selection service is provided. The service may configure network slices at a cell level which may include carrier frequencies or bands that may be ranked in terms of preference for a network slice. The service may provide frequency / band-network slice information to end devices via system information block and radio resource control messages. End devices may perform a cell search procedure and use other criteria to select and establish a network slice connection via a frequency / band of a network slice and in accordance with the service.

The application provides a multi-cell uplink data access method, device, system and electronic equipment, and belongs to the technical field of data processing. The method comprises the following steps: calculating the system frame offset and the sampling point offset of each synchronization cell according to the actual system frame number, the local system frame number, the actual sampling point count and the local sampling point count of each synchronization cell; sending a data storage trigger signal and / or a data reading trigger signal based on the system frame offset and the sampling point offset of each synchronization cell; the local system frame number and the local sampling point count are obtained by latching the local system frame counter and the local sampling point counter when the FPGA chip starts to store downlink data; and the actual system frame number and the actual sampling point count are determined after cell search using downlink data. The application can realize multi-cell uplink data access under a set of synchronized timing for multiple cells, reduce the difficulty of timing synchronization maintenance for multi-cell data processing, and improve the expansion flexibility.

The invention relates to a communication processing method and device, equipment and a storage medium. The method comprises the following steps: receiving a paging message sent by network equipment; when the terminal equipment is in a preset network searching scene, determining whether a service cell in which the terminal equipment currently resides is in a preset cell list or not; and when the service cell is not in the preset cell list, processing the paging message, and synchronously carrying out cell network searching corresponding to the preset network searching scene. Therefore, the technical problems that the terminal equipment cannot manually search the network for a long time and cannot normally use the communication service as soon as possible in the prior art can be solved.

An apparatus comprising means for broadcasting across a limited portion of a duplex band, based on a reserved subset of global synchronization channel numbers, that have been reserved for cells supporting sub-band non-overlapping full duplex communication; and receiving, from a terminal apparatus, a random access message for the sub-band non-overlapping full duplex communication.

The invention provides a communication method and device and a storage medium. The complexity of cell search can be reduced. In the method, a network device determines one or more access frequency points based on a current absolute time and a first mapping relationship; and sending a downlink synchronization signal at a first access frequency point in the determined one or more access frequency points. Correspondingly, the terminal equipment determines one or more access frequency points based on a first moment and a first mapping relation, and the first moment is the current time obtained by the terminal equipment; and detecting a downlink synchronization signal on the determined one or more access frequency points. Wherein the first mapping relationship indicates a corresponding relationship between the at least one access frequency point and the at least one time period, the current absolute time and the first moment are located in a first time period in the at least one time period, and the access frequency point is a frequency point which is provided by the network device for the terminal device and is used for access.

The invention provides a network selection method and device, electronic equipment and a chip system, and relates to the technical field of wireless communication, and the method comprises the steps: obtaining the cell information of a first cell, the first cell being a cell which is searched by a first communication entity in a network selection task and satisfies a first residence condition; the first communication entity is determined based on the entity identification information corresponding to the plurality of communication entities and the arbitration rule. And determining whether the first cell satisfies a second residence condition corresponding to the second communication entity based on the cell information and the target network identification information corresponding to the plurality of communication entities. And instructing the second communication entity to reside in the first cell under the condition that the first cell meets the second residence condition and the first communication entity and the second communication entity meet the switching condition. According to the method, the searched adaptive cell resources can be efficiently utilized, the overall network residing time of the multi-communication entity terminal is greatly shortened, and the network selection efficiency of the multi-communication entity is effectively improved.

The embodiment of the invention provides a cell selection method, a cell reselection method, a cell reselection measurement method, a communication method and related products. The method comprises the following steps: terminal equipment performs cell search on at least one candidate cell; and the terminal equipment selects a first cell in the at least one candidate cell based on the frequency point priority. Wherein the first cell satisfies a first condition, and the first condition comprises that a cell selection receiving level value of the first cell and a cell selection quality value of the first cell are both greater than 0. According to the example, the first cell is selected based on the priority, so that the UE has a larger probability to reside in the cell supporting the low power consumption characteristic as soon as possible, and the UE with energy-saving capacity or energy-saving demand is facilitated to realize energy saving.

Embodiments of the present application provide a cell selection method, a cell reselection method, a cell reselection measurement method, a communication method, and a related product. The cell selection method comprises: a terminal device performs cell search on at least one candidate cell; and then the terminal device selects a first cell from among the at least one candidate cell on the basis of frequency point priority. The first cell satisfies a first condition, and the first condition comprises: a cell selection receive level value of the first cell and a cell selection quality value of the first cell are both greater than 0. In this example, by selecting the first cell on the basis of priority, a UE has a higher probability of camping on a cell supporting low-power-consumption characteristics as soon as possible, which is beneficial for a UE having power-saving capability or power-saving requirements to achieve power saving.

A device and a method for reducing power consumption due to wireless communication in an electronic device are provided. The electronic device includes a sensor, a wireless communication circuit and a communication processor, wherein the communication processor can check a channel state while connected to a network through the wireless communication circuit, can check the movement state of a wearable device through the sensor if the channel state satisfies the specified condition related to network access restriction, can perform a cell search in a first period after a specified first time has elapsed if the wearable device is in a stationary state, and can perform a cell search in a second period that is relatively shorter than the first period if the wearable device is in a mobile state.

The invention relates to a cell searching method, a terminal and a computer readable storage medium. The method comprises the following steps: determining a first parameter and configuring automatic gain control based on a first sampling rate; under the condition that the automatic gain control passes the first parameter configuration, performing cell search based on the first sampling rate, and determining candidate cells; in response to the searched candidate cell, based on a second sampling rate, determining a second parameter and configuring automatic gain control, the second sampling rate being higher than the first sampling rate; and based on the second sampling rate, determining the candidate cell as a target cell for the terminal to access the target cell. The terminal adopts different sampling rates in each stage in the cell search process, and adopts a lower sampling rate under the condition of ensuring no loss of signal quality, so that the data processing operand is greatly reduced, and the power consumption of the terminal is reduced; in the sampling rate switching process, the automatic gain control parameters corresponding to the target sampling rate are configured in advance, the power information does not need to be observed in advance, and the power consumption is further reduced.