Method of transmitting data

摘要

The invention is related to a method of transmitting data whereby a transmission channel towards an access point (10) is shared among a plurality of users (12), the data being transmitted using the Contention Resolution Diversity Slotted ALOHA (CRDSA) method. According to the invention the number of copies (14a,14b, 14c; 16a, 16b, 16c; 18a,18b,18c) of data packet (14, 16, 18) transmitted simultaneously by a user (12) within one frame is varied.

主权项

1. Method of transmitting data, whereby a transmission channel towards an access point (10) is shared among a plurality of users (12),
the data being transmitted using the Contention Resolution Diversity Slotted ALOHA (CRDSA) method, characterized by the steps: varying the number of copies (14a, 14b, 14c; 16a, 16b, 16c; 18a, 18b, 18c) of a data packet (14, 16, 18) transmitted by a user (12) within one frame, and characterized in that the number of copies of a data packet within one frame is varied separately for each data packet according to a given distribution (Λd) whereby (Λd) is the probability of generating (d) copies of a data packet within one frame, whereby for a large number of transmission attempts (m) per frame, the number of copies will get closer to the given probability distribution whereby for m =∞ the number of copies corresponds to the probability distribution (Λd).