Disclosed are methods and apparatuses for transmitting and receiving characteristic information of a GNSS subframe. A method for transmitting and receiving characteristic information of a GNSS subframe, as a method for a first device, may comprise: receiving a subframe including first information, which is characteristic information of the subframe, from a second device; checking a format of the subframe on the basis of the first information; and determining whether to decode data included in the subframe on the basis of the checked format of the subframe.

Coordinated smart contract-based satellite management and operation is provided by obtaining terms of smart contracts that govern utilization of a constellation of Earth-orbiting satellites, which form a space-based data center, in transmitting data between the constellation of satellites and ground stations for receiving data transmissions. Different service providers operate different satellites of the constellation and different ground stations of the collection, and the smart contracts further govern servicing of requests made between the different service providers. A service provider operates satellite(s) of the constellation pursuant to the smart contracts and ground station(s) of the collection of ground stations. This includes receiving a request for data stored on a satellite, selecting a device to which the satellite is to send the data, the selecting being made between at least (i) a ground station and (ii) another satellite of the constellation, and initiating sending the data to the selected device.

A method, device, computer equipment and storage medium for GNSS time synchronization are disclosed. The method includes: receiving data packet of NMEA protocol, reading a valid UTC time from data packet of NMEA protocol, and storing the read valid UTC time in a time synchronization controller; receiving PPS signal, capturing a local time output by local clock when PPS signal is generated, and storing the local time in the time synchronization controller; reading a last local time stored before the current local time and reading the stored latest UTC time as a UTC time corresponding to the last local time when the time synchronization controller receives the current local time; and determining, by the time synchronization controller, a local time correction amount according to the last local time and the UTC time corresponding to the last local time, and correcting the local clock according to the local time correction amount.

A method for performing wireless communication by a first device and a device supporting the same are provided. The method may comprise: selecting a synchronization source based on a sidelink synchronization priority, wherein the synchronization source includes at least one of a global navigation satellite system (GNSS), a base station, or a UE; obtaining synchronization based on the synchronization source; transmitting, to a second device, sidelink-synchronization signal block (S-SSB) block based on the obtained synchronization, wherein the S-SSB block includes a sidelink primary synchronization signal (S-PSS), a sidelink secondary synchronization signal (S-SSS) and a physical sidelink broadcast channel (PSBCH); receiving, from a base station, information related to a configured grant (CG) resource; and transmitting, to the second device, first sidelink data on a CG resource based on information related to the CG resource.

Disclosed are a clock offset determination method and apparatus. The clock offset determination method provided in the embodiment of the present application includes: determining, by measuring downlink positioning reference signals (PRS) from a reference base station and a non-reference base station, a first positioning measurement value; determining, on the basis of the first positioning measurement value, a first clock offset between the reference base station and the non-reference base station; and on the basis of the first clock offset, assisting a target terminal to obtain a second clock offset.

A method of measuring a satellite signal includes: receiving, at an apparatus, the satellite signal; determining, at the apparatus, a first code phase of the satellite signal, corresponding to a first time period, based on a first portion of the satellite signal that has a first bandwidth; determining, at the apparatus, a second code phase of the satellite signal, corresponding to a second time period, based on a second portion of the satellite signal that has a second bandwidth, where the second bandwidth is larger than the first bandwidth, and where the second time period is separate from the first time period; and determining, at the apparatus, a carrier phase of the satellite signal based on the first portion of the satellite signal and a third portion of the satellite signal that has the first bandwidth and spans the second time period.

Techniques and systems are provided for positioning mixed-reality devices within mixed-reality environments. The devices, which are configured to perform inside out tracking, transition between position tracking states in mixed-reality environments and utilize positional information from other inside out tracking devices that share the mixed-reality environments to identify/update positioning of the devices when they become disoriented within the environments and without requiring an extensive or full scan and comparison/matching of feature points that are detectable by the devices with mapped feature points of the maps associated with the mixed-reality environments. Such techniques can conserve processing and power consumption that would be required when performing a full or extensive scan and comparison of matching feature points. Such techniques can also enhance the accuracy and speed of positioning mixed-reality devices.

Techniques and systems are provided for positioning mixed-reality devices within mixed-reality environments. The devices, which are configured to perform inside out tracking, transition between position tracking states in mixed-reality environments and utilize positional information from other inside out tracking devices that share the mixed-reality environments to identify/update positioning of the devices when they become disoriented within the environments and without requiring an extensive or full scan and comparison/matching of feature points that are detectable by the devices with mapped feature points of the maps associated with the mixed-reality environments. Such techniques can conserve processing and power consumption that would be required when performing a full or extensive scan and comparison of matching feature points. Such techniques can also enhance the accuracy and speed of positioning mixed-reality devices.

A method, apparatus and computer program product are provided to correct a predicted value of the position of a navigation satellite and/or a clock offset of a clock of the navigation satellite. In the context of a method implemented by a client computing device, a prediction is received, from a serving computing device, that includes at least one predicted value for the position of the navigation satellite at one or more points in time within a prediction interval. The method also determines, with the client computing device, such as an Internet of Things device, at least one error component and, based thereupon, corrects the prediction received from the serving computing device by correction at least one predicted value for one or more of: (i) the position of the navigation satellite or (ii) the clock offset for the clock of the navigation satellite.

A position detection method to be executed by a computer, the position detection method includes transmitting, by a sensor terminal, a signal obtained by performing capture processing on a satellite signal from a satellite of a search target according to an order of the satellites of the search targets; calculating, by a calculation device, a position of the sensor terminal based on a signal transmitted by the sensor terminal; and determining a satellite having a highest discovery probability based on a specific estimation method for second and subsequent search targets, using an index which is reflected larger as the discovery probability of other satellites is higher or lower, in a case where the first satellite is captured when a first search target is determined.