Identification of Active and Passive Entities in Wireless Communication System Using Zadoff-Chu Sequences

A method implemented by a control entity or and comprising:

• enabling identification of one or more digitally controllable scattering (DCS) entities by:
• obtaining a first set of first Zadoff-Chu (ZC), identities, a second set of second ZC identities a third set of third ZC identities and a fourth set of fourth ZC identities, wherein the first ZC identities of the are designed for being individually allocated to one or more transmitter entities, wherein the second ZC identities are designed for being individually allocated to the one or more DCS entities;
• wherein the third ZC identities are associated with different direct links from the transmitter entities to a receiver entity, wherein the third ZC identities are related according to a one-to-one function to the first ZC identities, wherein the fourth ZC identities are associated with different indirect links from the transmitter entities to the receiver entity via the DCS entities, wherein the first ZC identities, the second ZC identities, the third ZC identities, and the fourth ZC identities determine unique ZC sequences, and wherein the third set and the fourth set have no ZC identity in common;
• signaling the first set or the third set to the one or more transmitter entities;
• signaling the second set to the one or more DCS entities;
• signaling the first set of the third set to the receiver entity;
• and
• signaling the second set or the fourth set to the receiver entity.