Communications device, infrastructure equipment, wireless communications network and methods
A method of performing cell reselection by a wireless communications device comprises measuring a signal strength of radio signals received from a serving cell, determining whether the signal strength of the signals received from the serving cell is lower than a first predetermined signal strength threshold, if the signal strength is lower than the first predetermined signal strength threshold measuring a signal strength of a neighbor cell operating on the same frequency as the serving cell to generate signal strength measurements at a first rate, and in accordance with the signal strength measurements of the neighbor cell generated at the first rate determining whether to reselect to the neighbor cell.
1. A method of performing cell reselection by a wireless communications device, the method comprising:
measuring a signal strength of radio signals received from a serving cell;
determining whether the signal strength of the radio signals received from the serving cell is greater than a first predetermined signal strength threshold;
performing a first neighbor cell measurement at a first rate for the cell reselection in an idle mode in a case that the signal strength is greater than the first predetermined signal strength threshold;
comparing the signal strength of the radio signals received from the serving cell with a predetermined condition in a case that the signal strength of the radio signals received from the serving cell is not greater than the first predetermined signal strength threshold; and
performing a second neighbor cell measurement at a second rate, which is lower than the first rate, for the cell reselection in an idle mode in a case that the predetermined condition is satisfied.
2. The method of claim 1 , wherein the neighbor cell measurement includes identifying radio signals associated with one or more cells for the cell reselection and measuring one or more properties of the identified radio signals.
3. The method of claim 1 , wherein the neighbor cell measurements include a signal strength measurement.
4. The method of claim 1 , wherein the neighbor cell measurements include a signal quality measurement.
5. The method of claim 1 , wherein the predetermined condition is based on the measured signal strength of the radio signals received from the serving cell.
6. The method of claim 5 , wherein the predetermined condition is satisfied in a case that the measured signal strength of the radio signals received from the serving cell is higher than a second predetermined signal strength threshold.
7. The method of claim 1 , wherein the predetermined condition is based on a measured quality of the radio signals received from the serving cell.
8. The method of claim 7 , wherein the predetermined condition is satisfied in a case that the measured quality of the radio signals received from the serving cell is lower than a first predetermined signal quality threshold.
9. A user equipment (UE) configured to perform cell reselection, the UE comprising:
a wireless transceiver; and
circuitry configured to measure a signal strength of radio signals received from a serving cell;
determining whether the signal strength of the radio signals received from the serving cell is greater than a first predetermined signal strength threshold;
performing a first neighbor cell measurement at a first rate for the cell reselection in an idle mode in a case that the signal strength is greater than the first predetermined signal strength threshold;
compare the signal strength of the radio signals received from the serving cell with a predetermined condition in a case that the signal strength of the radio signals received from the serving cell is not greater than the first predetermined signal strength threshold; and
perform a second neighbor cell measurement at a second rate, which is lower than the first rate, for the cell reselection in an idle mode in a case that the predetermined condition is satisfied.
10. The UE of claim 9 , wherein the neighbor cell measurement includes identifying radio signals associated with one or more cells for the cell reselection and measuring one or more properties of the identified radio signals.
11. The UE of claim 9 , wherein the neighbor cell measurements include a signal strength measurement.
12. The UE of claim 9 , wherein the neighbor cell measurements include a signal quality measurement.
13. The UE of claim 9 , wherein the predetermined condition is based on the measured signal strength of the radio signals received from the serving cell.
14. The UE of claim 13 , wherein the predetermined condition is satisfied in a case that the measured signal strength of the radio signals received from the serving cell is higher than a second predetermined signal strength threshold.
15. The UE of claim 13 , wherein the predetermined condition is based on a measured quality of the radio signals received from the serving cell.
16. The UE of claim 15 , wherein the predetermined condition is satisfied in a case that the measured quality of the radio signals received from the serving cell is lower than a first predetermined signal quality threshold.