Patent Number: 6,310,867

Title: Portable radio telephone and methods of operation

Abstract: A portable radio telephone (5) communicates with base stations (1, 2) in a digital radio telephone system, such as DECT, employing TDMA transmission. The portable radio telephone is programmed with an algorithm which is operative to select a communication channel by storing a blind slot mask (7) representative of the time slots in each frame which are excluded. The algorithm is operative to check the time slots for availability in a predetermined sequence which corresponds to the temporal sequence of the slots (or the reverse thereof) to promote orderly filling of the time slots at the base stations.

Inventors: Tat; Nguyen Quan (Surrey, GB), Saunders; Robert Stanley (Surrey, GB)

Assignee: Nokia Mobile Phones Limited

International Classification: H04J 4/00 (20060101); H04Q 7/32 (20060101); H04Q 7/38 (20060101); H04B 007/212 ()

Expiration Date: 10/30/2018