US 8,509,797 B2 · Cell selection in a cellular communication system

Abstract

A method in a user equipment for handling cell selection is provided. While in dedicated mode the user equipment receives from a radio network node a measurement information message which indicates at least two frequencies associated with a respective cell in a respective radio access technology. While it is in dedicated mode, the user equipment performs measurements on the frequencies to obtain a respective measurement value for each one of them, and receives a selection indicator message comprising a respective priority for each one of the frequencies. The user equipment obtains a respective threshold value for each of the frequencies and successively evaluates the frequencies in descending priority order until a frequency is determined for which the measurement value exceeds its respective threshold value. When entering idle mode, the user equipment selects cell based on the evaluation.

Claims10

Dependent claims

A method in a user equipment for handling cell selection in a cellular communication system, the method comprising:

entering dedicated mode,
while in dedicated mode, receiving from a radio network node a measurement information message indicating at least two frequencies, each of which indicated frequencies is associated with a respective cell implementing a respective radio access technology,
while in dedicated mode, performing measurements on the indicated frequencies to obtain a respective measurement value for each one of the indicated frequencies,
while in dedicated mode, receiving from the radio network node a selection indicator message comprising a respective priority for each one of the indicated frequencies,
while in dedicated mode, obtaining a respective threshold value for each of the respective indicated frequencies,
successively evaluating the indicated frequencies in descending priority order until an indicated frequency is determined for which the measurement value obtained for that frequency exceeds its respective threshold value, and
when entering idle mode, selecting based on the evaluation the cell with which the determined frequency is associated.

4 more elements

A user equipment for handling cell selection in a cellular communication system, the user equipment comprising:

a receiver configured to, while the user equipment is in dedicated mode, receive from a radio network node a measurement information message indicating at least two frequencies, each of which indicated frequencies is associated with a respective cell implementing a respective radio access technology, and receive from the radio network node a selection indicator message comprising a respective priority for each one of the indicated frequencies,
a measurement unit configured to, while the user equipment is in dedicated mode, perform measurements on the indicated frequencies to obtain a respective measurement value for each one of the indicated frequencies,
an obtaining unit configured to, while the user equipment is in dedicated mode, obtain a respective threshold value for each of the respective indicated frequencies,
an evaluation unit configured to successively evaluate the indicated frequencies in descending priority order until an indicated frequency is determined for which the measurement value obtained for that frequency exceeds its respective threshold value, and
a selection unit configured to, when the user equipment enters idle mode, select based on the evaluation the cell with which the determined frequency is associated.

2 more elements

Dependencies are inferred from the claim text.

Cell selection in a cellular communication system

Life of this patent

Cell selection in a cellular communication system

Life of this patent

Abstract

Claims10