Method for an intersystem connection handover
DCFirst Claim
Patent Images
1. A method for controlling an intersystem handover from a first radio access technology using a first transmission method to a second radio access technology using a second transmission method, comprising:
- comparing a threshold value to a first transmission quality of a first signal to a first base transceiver station of the first radio access technology with respect to at least one first transmission characteristic, determined by a subscriber station; and
only after the first transmission quality drops below the threshold value, determining, by the subscriber station throughout a predetermined time interval, a second transmission quality of a second signal to a second base transceiver station of the second radio access technology with respect to at least one second transmission characteristic.
8 Assignments
Litigations
1 Petition
Accused Products
Abstract
Intersystem connection handover is based on transmission quality of a first radio communication system to a base station as determined by a subscriber station. If the transmission quality is lower than a threshold value, a transmission quality determination routine to a base station of the second radio communication system is triggered. The determination routine is continued until a criterion separate from the threshold is fulfilled.
30 Citations
20 Claims
-
1. A method for controlling an intersystem handover from a first radio access technology using a first transmission method to a second radio access technology using a second transmission method, comprising:
-
comparing a threshold value to a first transmission quality of a first signal to a first base transceiver station of the first radio access technology with respect to at least one first transmission characteristic, determined by a subscriber station; and only after the first transmission quality drops below the threshold value, determining, by the subscriber station throughout a predetermined time interval, a second transmission quality of a second signal to a second base transceiver station of the second radio access technology with respect to at least one second transmission characteristic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A subscriber station for carrying out a method for controlling an intersystem handover from a first radio access technology using a first transmission method to a second radio access technology using a second transmission method, comprising:
a processor programmed to determine a first transmission quality of a first signal to a first base transceiver station of the first radio access technology with respect to at least one first transmission characteristic, to compare the first transmission quality to a threshold value and, only after the first transmission quality drops below the threshold value, to determine, throughout a predetermined time interval, a second transmission quality of a second signal to a second base transceiver station of the second radio access technology with respect to at least one second transmission characteristic, until a criterion separate from the threshold value is met. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
-
20. A base station subsystem of one of a mobile radio system and a wireless subscriber access system using a first transmission method implementing a first radio access technology, for carrying out an intersystem handover to another base station subsystem using a second transmission method implementing a second radio access technology, comprising:
a processor programmed to determine a first transmission quality of a first signal to said base station subsystem with respect to at least one first transmission characteristic and, only after the first transmission quality drops below a threshold value, to determine, throughout a predetermined time interval, a second transmission quality of a second signal to the other base station subsystem with respect to at least one second transmission characteristic, until a criterion separate from the threshold value is met.
Specification