Embodiments of the present disclosure provide a method and an apparatus for detecting a characteristic sequence in a wireless communication system. The method includes: receiving, by a receiving end base station, an original characteristic sequence periodically transmitted by a transmitting end base station; detecting out, by the receiving end base station, a candidate characteristic sequence meeting a preset condition from the original characteristic sequence; determining whether the candidate characteristic sequence is a valid characteristic sequence; and detecting whether there is an associated event based on a preset rule according to the detected valid characteristic sequence. In this way, it is solved the problem that it cannot be guaranteed that the number of characteristic sequences falsely detected is reduced without increasing the missed-detection probability in a scenario of larger number of detections in the prior art.

According to aspects, a BS may determine presence of a narrow GB or lack of a GB to separate a first RB used for DL transmission from the BS to a first UE and a second RB used for DL transmission from the BS to a second UE. In response to the determination, the BS may transmit, to the first UE, interference information associated with the transmission from the BS to the second UE. According to aspects, a BS may determine a presence of a narrow GB or lack of a GB to separate a first RB used for UL transmission from a first UE to the BS and a second RB used for UL transmission from a second UE to the BS. In response to the determination, the BS may transmit to the first UE, interference information associated with the UL transmission from the second UE to the BS.

Apparatuses and methods for decoding a spreading code-encoded signal. The decoder decodes a spreading code-encoded signal by performing a synchronization search to determine a synchronization point. The synchronization point defines a time delay for aligning a spreading code, which was used to generate the spreading code-encoded signal, with the spreading code-encoded signal. The synchronization search includes obtaining candidate results, where each candidate result is a decoding attempt that applies a time delay for aligning the spreading code with the spreading code-encoded signal. The synchronization search also includes determining the synchronization point by identifying the time delay corresponding to the candidate result that is associated with a power measurement that satisfies a synchronization search criterion. A decoder code synchronization is performed to align the spreading code with the spreading code-encoded signal, using the synchronization point. The spreading code-encoded signal is decoded using the aligned spreading code.

The present application relates to a method of generating a downlink frame. The method of generating the downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence and a second scrambling sequence determined by the primary synchronization signal; generating a third scrambling sequence determined by the first short sequence and a fourth scrambling sequence determined by the second short sequence; scrambling the short sequences with the respective scrambling sequences; and mapping the secondary synchronization signal that includes the first short sequence scrambled with the first scrambling sequence, the second short sequence scrambled with the second scrambling sequence and the third scrambling sequence, the second short sequence scrambled with the first scrambling sequence and the first short sequence scrambled by the second scrambling sequence and the fourth scrambling sequence to a frequency domain.

The invention relates to a method and devices for mutual communication between devices, and to computer programs enabling such communication. According to the invention, in a first device is controlled a transmitter module operable in a local radio communications network to transmit a sequence of radio signal pulses representing a predetermined code. In at least one second device a receiver module is scanning said local radio communications network to detect said predetermined code. A contact network of the user of said at least second device is accessed, and the predetermined code is checked in the second device against the user's contact network for a match stored in the network profiles for the contacts. Then a validation key is fetched, that relates to a matching contact found in said contact network, and a connection establishment request containing the validation key is sent over said local radio communications network from the second device to the first device. Thus the origin of the connection establishment request is validated in the first device.

A method for communication includes obtaining a timing signal from a timing synchronization reference source, computing a system frame number (SFN)-direct frame number (DFN) offset, creating a timing fingerprint using the timing signal and the SFN-DFN offset, the timing fingerprint also comprising additional timing information, entering the timing fingerprint into a database, continually updating the timing fingerprint, determining whether the timing signal remains within a threshold, if the timing signal exceeds the threshold, iterating the timing fingerprint, verifying the timing fingerprint to determine whether there is a timing inconsistency between a most recent timing fingerprint and current time, if the timing fingerprint is verified, using the SFN-DFN offset to derive current DFN timing to decode a sidelink control information (SCI) communication, and if the SCI communication is decoded, using the timing signal for communicating over a sidelink communication channel.

Various communication systems may benefit from improved transmissions. For example, a network transmission may benefit from improved throughput and efficiency in non-schedule multiple access communications. A method includes selecting at a user equipment operating in a non-scheduled access scheme at least one of a first codeword or a second codeword based on an amount of data. The data in the non-scheduled access scheme can be spread according to a spreading sequence. The method also includes determining a transport block size for at least one of the first codeword or the second codeword. In addition, the method includes transmitting the data from the user equipment to a network node using at least one of the first codeword or the second codeword.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may determine, when using resource spread multiple access with non-orthogonal multiple access, that a particular modulation scheme is enabled. The user equipment may process symbols using a set of processing sequences selected based at least in part on the particular modulation scheme such that the particular modulation scheme is preserved for the symbols. The user equipment may transmit the symbols based at least in part on processing the symbols using the set of processing sequences. Numerous other aspects are provided.

The present application relates to a method of generating a downlink frame. The method of generating the downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence and a second scrambling sequence determined by the primary synchronization signal; generating a third scrambling sequence determined by the first short sequence and a fourth scrambling sequence determined by the second short sequence; scrambling the short sequences with the respective scrambling sequences; and mapping the secondary synchronization signal that includes the first short sequence scrambled with the first scrambling sequence, the second short sequence scrambled with the second scrambling sequence and the third scrambling sequence, the second short sequence scrambled with the first scrambling sequence and the first short sequence scrambled by the second scrambling sequence and the fourth scrambling sequence to a frequency domain.

A search is performed by a UE for cells in a wireless communication system, comprising: searching, in a frequency band, for a block that comprises a SS; determining, in response to finding the SS within the block, whether there is an indication in the block of a frequency range in which no remaining system information will be found; and continuing, in response to the indication being in the block, to search for cells in frequencies after the particular frequency. A network element determines that no remaining system information is to be transmitted in a block and in subsequent block(s) to be transmitted over a frequency band, and transmits the block with a SS used for UEs to search for cells, and with indication of a frequency range, from a current frequency corresponding to the transmitted block and in the frequency band, over which no remaining system information will be found.