Mobility in a wireless network
A system and method for mobility in a wireless network are presented. A user equipment with a processor configured to inform a network component of a closed subscriber group (CSG) capability of the UE. The processor informs the network component during capability exchange signaling. The processor informs the network component whether the UE is capable of detecting a CSG cell and whether the UE is a member of at least one CSG.
1. A method implemented in a user equipment (UE), the method comprising:
storing an allowed closed subscriber group (CSG) list;
receiving a measurement reporting criterion from a network component, the measurement reporting criterion specifying a signal strength criterion including a reference signal received power (RSRP) threshold, a reference signal received quality (RSRQ) threshold, or both, and a prioritized reporting indicator that indicates whether CSG cells that do not have a best detected RSRP value or a best detected RSRQ value are permitted for reporting in measurement reports;
determining whether a CSG cell is a member of the allowed CSG list;
determining if at least one of the RSRP threshold or the RSRQ threshold is met with respect to the CSG cell; and
upon determining that at least one of the RSRP threshold or the RSRQ threshold is met with respect to the CSG cell and regardless of whether the CSG cell is a member of the allowed CSG list: (i) generating a measurement report that includes measurement results of the CSG cell and an indication of whether or not the CSG cell is a member of the allowed CSG list and (ii) sending the measurement report to the network component.
2. The method of claim 1 , wherein the measurement reporting criterion further specifies a maximum number of non-CSG cells that can be included in the measurement report.
3. The method of claim 2 , wherein the measurement report includes measurement results associated with said maximum number of non-CSG cells.
4. The method of claim 1 , further comprising generating and sending the measurement report to the network component upon determining that the CSG cell is not a member of the allowed CSG list and determining that at least one of the RSRP threshold or the RSRQ threshold is met with respect to the CSG cell, wherein the indication included in the measurement report indicates that the CSG cell is not a member of the allowed CSG list.
5. The method of claim 1 , wherein the measurement report is further generated according to the prioritized reporting indicator.
6. The method of claim 1 , wherein the prioritized reporting indicator further specifies a preferred CSG list membership to cause the UE to include a CSG cell that does not have a strongest detected RSRP value or a strongest detected RSRQ value in the measurement report based on a preference for the CSG cell that does not have the strongest detected RSRP value or the strongest detected RSRQ value.
7. A method implemented in a network component, the method comprising:
generating a measurement reporting criterion that specifies a signal strength criterion including a reference signal received power (RSRP) threshold, a reference signal received quality (RSRQ) threshold, or both, and a prioritized reporting indicator that indicates whether CSG cells that do not have a best detected RSRP value or a best detected RSRQ value are permitted for reporting in measurement reports;
sending the measurement reporting criterion to a user equipment (UE); and
receiving from the UE a measurement report associated with a closed subscriber group (CSG) cell, wherein the measurement report that is received includes an indication of whether or not the CSG cell is a member of an allowed CSG list and measurement results of the CSG cell regardless of whether the CSG cell is a member of the allowed CSG list.
8. The method of claim 7 , wherein the measurement reporting criterion further specifies a maximum number of non-CSG cells that can be included in the measurement report.
9. The method of claim 8 , wherein the measurement report that is received by the network component includes measurement results associated with said maximum number of non-CSG cells.
10. The method of claim 7 , wherein the network component is configured to receive the measurement report upon the UE determining that at least one of the RSRP threshold or the RSRQ threshold is met with respect to the CSG cell.
11. The method of claim 7 , further comprising sending the UE instructions to acquire a closed subscriber group (CSG) identity (ID) of the CSG cell, if the CSG cell broadcasts the CSG ID.
12. A method implemented in a network component, the method comprising:
generating a measurement reporting criterion that specifies a signal strength criterion including a reference signal received power (RSRP) threshold, a reference signal received quality (RSRQ) threshold, or both, and a prioritized reporting indicator that indicates whether CSG cells that do not have a best detected RSRP value or a best detected RSRQ value are permitted for reporting in measurement reports; and
instructing the user equipment (UE) to send the network component a measurement report if at least one of the RSRP threshold or the RSRQ threshold is met with respect to a closed subscriber group (CSG) cell, the measurement report including an indication of whether or not the CSG cell is a member of an allowed CSG list and measurement results of the CSG cell regardless of whether the CSG cell is a member of the allowed CSG list.
13. The method of claim 12 , wherein the measurement reporting criterion further specifies a maximum number of non-CSG cells that can be included in the measurement report.
14. The method of claim 13 , wherein the measurement report that is received, relative to sending of the measurement reporting criterion, includes measurement results associated with said maximum number of non-CSG cells.
15. The method of claim 12 , wherein the network component is configured to receive the measurement report upon the UE determining that the CSG cell is a member of the allowed CSG list and that at least one of the RSRP threshold or the RSRQ threshold is met with respect to the CSG cell.
16. The method of claim 12 , wherein instructing the UE to send the network component the measurement report is such that if at least one of the RSRP threshold or the RSRQ threshold is met with respect to the CSG cell, the network component instructs the UE to send the measurement report to the network component regardless of whether the CSG cell is or is not a member of the allowed CSG list.