Disclosed herein are techniques to provide an indication of bandwidth to establish a TxOP using channel bonding. An information element may be generated to include an RTS frame or a CTS frame and an indication of bandwidth in a parity portion of the information element. The indication of bandwidth may be included by using 16 bits of the parity bits of parity bytes for a PHY header of the information element.

In a method for avoiding an error detection of control channels in a mobile-radio device, a transmitter device transmits control signals on control channels which are received and decoded by the mobile-radio device. A control channel contains a bit sequence and a check-value of the bit sequence. In the case of a successful check-value comparison, the mobile-radio device accepts the control channel and otherwise rejects the control channel. A control channel, which has not been allocated to a mobile-radio device is defined with a filler sequence which dedicates in the case of a check-value comparison and always leads to the rejection of the control channel.

A method and an apparatus in a multiple-input multiple-output (MIMO) wireless communication system are provided. A signal is received over a channel. The channel is decomposed into a plurality of virtual channels. Symbol detection is performed on each of the plurality of virtual channels using respective symbol detectors. At least one of the symbol detectors has a lower rank than that of the channel. Output from the symbol detectors is combined to obtain final log likelihood ration (LLR) values for layers of the channel. Decoding is performed using the final LLR values to output a decoded symbol value of the received signal.

A communication system is a communication system that includes first and second information processing devices. The first information processing device performs control such that a signal (which is a signal having backward compatibility) serving as an index by which the second information processing device receiving a frame stops the reception of the frame is transmitted to the second information processing device. The second information processing device performs control such that the reception of the frame is stopped based on the signal (which is a signal having backward compatibility) serving as an index by which reception of the frame is stopped when the frame transmitted from the first information processing device is received.

The present invention relates to a decoding method of a software modem in a limited memory environment using overlapping fragmentation and progressive decoding, which processes packets in real-time and reduces power consumption in an environment in which memory is limited when the software modem is used, and the decoding method includes: (a) receiving a data packet from the signal processing device, by the software modem; (b) fragmenting the data packet, decoding the fragments by the fragment, and transferring a decoded MAC header to the MAC module, by the software modem; (c) analyzing the MAC header and verifying whether the packet is a data packet transmitted to the MAC module itself or the packet is damaged, by the MAC module; (d) directing, when the data packet is verified, the software modem to perform additional decoding on the data packet, by the MAC module; and (e) directing, when the data packet is not verified, the software modem to drop the data packet, by the MAC module.

According to the method as described above, since decoding is performed after receiving only some blocks of a packet, there is an effect of implementing the software modem in an MCU of a low price and a low specification even in a limited memory environment.

A method for detecting a format of data in a wireless local area network and a device using the same are provided. The device receives a physical layer protocol data unit (PPDU) that includes a first field and a second field. The device determines a first format of the PPDU based on at least one of the first field and the second field and determines a second format of the PPDU based on a modulation phase of the PPDU.

Provided is a method and apparatus for transmitting/receiving downlink control information (DCI). DCI is set to have different DCI formats according to a coverage enhancement (CE) mode of a user equipment. In the case of a DL grant, the DCI is set according to a first DCI format when the CE mode of the user equipment is CE Mode A, and the DCI is set according to a second DCI format when the CE mode of the user equipment is CE Mode B. In the case of a UL grant, the DCI is set according to a third DCI format when the CE mode of the user equipment is CE Mode A, and the DCI is set according to a fourth DCI format when the CE mode of the user equipment is CE Mode B.

Embodiments of the present invention provide an information transmission method, including: obtaining, by a first device, N layers of symbol data sequences; performing scrambling processing on each of the N layers of symbol data sequences, to obtain a scrambled signal; and sending the scrambled signal to a second device, where N is a positive integer. Such a method for multiplexing and transmitting a plurality of layers of information based on a scrambled signal can improve a system performance gain.

In some aspects, methods and apparatus for wireless communications are configured to generate a packet for wireless communication where the packet includes a mark symbol in a preamble of the packet where the mark symbol includes a signature or stamp field in the mark to provide protocol information that indicates the protocol of the packet, such as an 802.11 EHT packet. In some other aspects, a cyclic redundancy check field in the mark symbol may be manipulated in various ways to indicate the protocol of the packet in lieu of providing the signature or stamp field.

The present invention provides an information transmission method, including: generating first information; determining a first sequence from N candidate sequences based on the first information, where the first information belongs to N candidate information, a mapping between the first information and the first sequence belongs to P mappings, each of the P mappings includes a mapping between the N candidate information and the N candidate sequences, and the N candidate sequences are generated based on N dedicated cyclic shift values and a first initial cyclic shift value; and in at least two mappings, dedicated cyclic shift values used to generate candidate sequences corresponding to a same candidate information are different, where the same candidate information belongs to L candidate information in the N candidate information, both P and L are integers greater than 1, and the L is less than or equal to N; and sending the first sequence.