Method and apparatus for radio signal transmission and reception in communication system

A method of a second communication node, comprising:

• receiving, from a first communication node, a signal consisting of modulation symbols generated by modulating a base sequence associated with a physical cell identity of the first communication node;
• and
• obtaining the physical cell identity of the first communication node from the signal using base sequences associated with physical cell identities,
• wherein each of the base sequences associated with the physical cell identities is generated, for each of the physical cell identities, as 2M elements based on distributed concatenation of a first intermediate base sequence consisting of M elements generated based on first, second, and third binary sequences and a second intermediate base sequence consisting of M elements generated by modifying the first intermediate base sequence, and M is a natural number.

A first communication node in a communication system, comprising a processor, wherein the processor causes the first communication to perform:

• generating a first intermediate base sequence consisting of M elements based on first, second and third binary sequences, wherein M is a natural number;
• generating a second intermediate base sequence consisting of M elements by modifying the first intermediate base sequence;
• generating a base sequence consisting of 2M elements based on distributed concatenation of the first intermediate base sequence and the second intermediate base sequence;
• mapping modulation symbols generated by modulating the base sequence to 2 (M+1) subcarriers;
• and
• transmitting a signal consisting of the mapped modulation symbols to a second communication node.