Handover method and device for a cellular mobile radio system

Details Handover method and device for a cellular mobile radio system Handover method and device for a cellular mobile radio system

1994-10-27

1997-03-18

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at separate stations

455 561, 370337, 379 60, H04Q 738

Patent

active

056132034

ABSTRACT:
In a method for handover between old and new cells of a time-division multiple access (TDMA) cellular mobile radio system a call between a mobile station and the system, initially effected via the old cell on a first channel defined by a first on air timeslot and a first set of frequencies comprising at least one frequency, is effected via the new cell on a new channel defined by a second on air timeslot and a second set of frequencies comprising at least one frequency. The first and second on air timeslots are identical, the first and second sets of frequencies are separate, and the method consists in transmitting, after verifying that the second on air timeslot identical to the first on air timeslot is available in the new cell, a frequency indication message indicating to the mobile station the second set of frequencies so that the mobile station continues the call using the same on air timeslot and the second set of frequencies.

REFERENCES:
patent: 5109528 (1992-04-01), Uddenfeldt
patent: 5230082 (1993-07-01), Ghisler et al.
patent: 5327577 (1994-07-01), Uddenfeldt
patent: 5483668 (1996-01-01), Malkamaki et al.
patent: 5487185 (1996-01-01), Halonen
Patent Abstracts Of Japan, vol. 11, No. 77 (E-487) 7 Mar. '87 & JP-A-61 232 792 (NEC).

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