Cell re-selection in a cellular telecommunications network
View Patent ↗According to an aspect of the present disclosure, there may be provided a method in a wireless cellular telecommunications device camped on a serving cell, the device storing a parameter obtained by decoding system information of a first cell. The method comprises: measuring an attribute of a signal received from a candidate cell; and, evaluating the candidate cell for re-selection based on the measured attribute according to a priority-based re-selection algorithm irrespective of the stored parameter. The parameter indicates a minimum required received signal code power. A device and computer readable medium are also provided.
1. A method in a wireless cellular telecommunications device camped on a serving cell, the method comprising:
storing a parameter obtained by decoding system information of a first cell;
measuring an attribute of a signal received from a candidate cell; and,
evaluating the candidate cell for re-selection based on the measured attribute according to a priority-based re-selection algorithm irrespective of the stored parameter, wherein the stored parameter indicates a minimum required received signal code power.
2. A method according to claim 1 , further comprising performing re-selection from the serving cell to the candidate cell based on the evaluation.
3. A method according to claim 1 , wherein evaluating the candidate cell includes at least:
acquiring system information of the candidate cell, the system information including a candidate cell parameter;
determining if the measured attribute exceeds the candidate cell parameter by a predetermined amount; and,
if the measured attribute exceeds the candidate cell parameter by a predetermined amount, performing re-selection to the candidate cell.
4. A method according to claim 3 in which the predetermined amount is 0 dB.
5. A method according to claim 1 , wherein evaluating the candidate cell for re-selection includes at least:
determining if the measured attribute exceeds a predetermined default value; and,
if the measured attribute fails to exceed the predetermined default value, determining that the candidate cell does not meet re-selection requirements.
6. A method according to claim 1 , in which the measured attribute is received signal code power (RSCP).
7. A method according to claim 1 , in which the candidate cell is a UTRAN cell.
8. A method according to claim 1 , in which the serving cell is a GERAN cell.
9. A method according to claim 1 , further comprising:
measuring an attribute of a signal received from a second cell; and,
evaluating the second cell for re-selection based on the measured attribute and the stored parameter according to a ranking algorithm.
10. A method according to claim 1 , in which the serving and candidate cells are of the same wireless radio network.
11. A method according to claim 1 , in which the serving and candidate cells are of different wireless radio networks.
12. A wireless cellular telecommunications device adapted to:
camp on a serving cell;
store a parameter obtained by decoding system information of a first cell;
measure an attribute of a signal received from a candidate cell; and,
evaluate the candidate cell for re-selection based on the measured attribute according to a priority-based re-selection algorithm irrespective of the stored parameter, wherein the stored parameter indicates a minimum required signal code power.
13. A device according to claim 12 , further adapted to perform re-selection from the serving cell to the candidate cell based on the evaluation.
14. A device according to claim 12 wherein evaluating the candidate cell includes at least:
acquiring system information of the candidate cell, the system information including a candidate cell parameter;
determining if the measured attribute exceeds the candidate cell parameter by a predetermined amount; and,
if the measured attribute exceeds the candidate cell parameter by a predetermined amount, performing re-selection to the candidate cell.
15. A device according to claim 14 in which the predetermined amount is 0 dB.
16. A device according to claim 12 wherein evaluating the candidate cell for re-selection includes at least:
determining if the measured attribute exceeds a predetermined default value; and,
if the measured attribute fails to exceed the predetermined default value, determining that the candidate cell does not meet re-selection requirements.
17. A device according to claim 12 in which the measured attribute is received signal code power (RSCP).
18. A device according to claim 12 in which the candidate cell is a UTRAN cell.
19. A device according to claim 12 in which the serving cell is a GERAN cell.
20. A device according to claim 12 further adapted to:
measure an attribute of a signal received from a second cell; and,
evaluate the second cell for re-selection based on the measured attribute and the stored parameter according to a ranking algorithm.
21. A device according to claim 12 in which the serving and candidate cells are of the same wireless radio network.
22. A device according to claim 12 in which the serving and candidate cells are of different wireless radio networks.
23. A computer-readable storage medium having stored thereon instructions which can be executed by a device to:
camp on a serving cell;
store a parameter obtained by decoding system information of a first cell;
measure an attribute of a signal received from a candidate cell; and,
evaluate the candidate cell for re-selection based on the measured attribute according to a priority-based re-selection algorithm irrespective of the stored parameter, wherein, the stored parameter indicates a minimum required signal code power.