A device in a first node for wireless communication, characterized in that said device comprises: a first processor, to generate a first bit block and to perform channel coding; a first transmitter, to transmit a first radio signal; wherein bits in the first bit block are used to generate bits in a second bit block, a third bit block comprises the bits in the second bit block and the bits in the first bit block, the third bit block is used to generate the first radio signal; the first bit block and the second bit block comprise P1 second-type bits and P2 first-type bits, respectively, the third bit block comprise P3 binary bits, any one of the P1 second-type bits or the P2 first-type bits is a binary bit, and the P1, the P2 and the P3 are positive integers, respectively; the third bit block is used as an input to the channel coding, an output of the channel coding is used to generate the first radio signal, the channel coding is based on a polar code; among first-type bits associated with a first target bit and independent of a second target bit, a first bit is arranged foremost in the third bit block, among first-type bits associated with the second target bit and independent of the first target bit, a second bit is arranged foremost in the third bit block, the first bit is prior to the second bit, a position of the first target bit in the third bit block is prior to a position of the second target bit in the third bit block, and the first target bit and the second target bit are any two of the P1 second-type bits; a CRC bit block of the first bit block is used to generate the second bit block, an arbitrary bit of the second bit block is dependent on one bit of the CRC bit block of the first bit block; at least two second-type bits of the P1 second-type bits have front and rear positions in the first bit block opposite to front and rear positions in the third bit block; all of second-type bits associated with a given first-type bit are arranged prior to the given first-type bit in the third bit block, and the given first-type bit is one of the P2 first-type bits. a first processor, to generate a first bit block and to perform channel coding; a first transmitter, to transmit a first radio signal; wherein bits in the first bit block are used to generate bits in a second bit block, a third bit block comprises the bits in the second bit block and the bits in the first bit block, the third bit block is used to generate the first radio signal; the first bit block and the second bit block comprise P1 second-type bits and P2 first-type bits, respectively, the third bit block comprise P3 binary bits, any one of the P1 second-type bits or the P2 first-type bits is a binary bit, and the P1, the P2 and the P3 are positive integers, respectively; the third bit block is used as an input to the channel coding, an output of the channel coding is used to generate the first radio signal, the channel coding is based on a polar code; among first-type bits associated with a first target bit and independent of a second target bit, a first bit is arranged foremost in the third bit block, among first-type bits associated with the second target bit and independent of the first target bit, a second bit is arranged foremost in the third bit block, the first bit is prior to the second bit, a position of the first target bit in the third bit block is prior to a position of the second target bit in the third bit block, and the first target bit and the second target bit are any two of the P1 second-type bits; a CRC bit block of the first bit block is used to generate the second bit block, an arbitrary bit of the second bit block is dependent on one bit of the CRC bit block of the first bit block; at least two second-type bits of the P1 second-type bits have front and rear positions in the first bit block opposite to front and rear positions in the third bit block; all of second-type bits associated with a given first-type bit are arranged prior to the given first-type bit in the third bit block, and the given first-type bit is one of the P2 first-type bits.