Apparatuses, systems, and methods for measuring quality of cell discovery signal
View Patent ↗Embodiments of the present disclosure are directed towards devices and methods for discovering and waking up dormant access nodes in cellular networks. In one embodiment, the user equipment may be configured with information to assist in determining a discovery zone of discovery signals transmitted by cells in a network. In some embodiments, the information may include a duration of a discovery zone.
1. One or more non-transitory, computer-readable media having instructions that, when executed, cause a user equipment to:
process configuration information, received from an Evolved Universal Terrestrial Radio Access Network (EUTRAN), that includes information about a duration of a discovery zone in which a discovery signal of a cell of the EUTRAN may be transmitted;
measure received power over all orthogonal frequency division multiplexing (OFDM) symbols that could carry a discovery signal within the discovery zone to determine a received signal strength indicator (RSSI);
determine a reference signal received power (RSRP) based on a linear average of power contributions of resource elements that carry cell-specific reference signals within the discovery zone: and
generate a reference signal received quality (RSRQ) based on the RSSI and the RSRP.
2. The one or more non-transitory, computer-readable media of claim 1 , wherein the configuration information further includes an indication of a discovery signal measurement timing configuration (DMTC).
3. The one or more non-transitory, computer-readable media of claim 2 , wherein the DMTC comprises a periodicity and offset.
4. The one or more non-transitory, computer-readable media of claim 1 , wherein the discovery zone comprises one or more subframes.
5. The one or more non-transitory, computer-readable media of claim 1 , wherein all OFDM symbols comprise all OFDM symbols of downlink parts of one or more subframes in the discovery zone.
6. The one or more non-transitory, computer-readable media of claim 1 , wherein the instructions, when executed, further cause the user equipment to generate the RSRQ to be equal to (N×RSRP)/RSSI, where N is a number of resource blocks of the discovery zone.
7. The one or more non-transitory, computer-readable media of claim 6 , wherein the instructions, when executed, further cause the user equipment to transmit a feedback message, which includes an indication of the RSRQ, to the EUTRAN.
8. An apparatus to be employed in a user equipment, the apparatus comprising:
configuration circuitry to process configuration information, received from an Evolved Universal Terrestrial Radio Access Network (EUTRAN), that includes information about a duration of a discovery zone in which a discovery signal of a cell of the EUTRAN may be transmitted;
measurement circuitry to measure received power over all orthogonal frequency division multiplexing (OFDM) symbols that could carry a discovery signal within a discovery zone to determine a received signal strength indicator (RSSI); and
reporting circuitry to generate a feedback message that includes a reference signal received quality (RSRQ) based on the RSSI and a reference signal received power (RSRP), the RSRP determined based on a linear average of power contributions of resource elements that carry cell-specific reference signals within the discovery zone.
9. The apparatus of claim 8 , wherein the configuration information further includes an indication of a discovery signal measurement timing configuration (DMTC).
10. The apparatus of claim 9 , wherein the DMTC comprises a periodicity and offset.
11. The apparatus of claim 8 , wherein the discovery zone comprises one or more subframes.
12. The apparatus of claim 8 , wherein all OFDM symbols comprise all OFDM symbols of downlink parts of one or more subframes in the discovery zone.
13. The apparatus of claim 8 , wherein the RSRQ is equal to (N×RSRP)/RSSI, where N is a number of resource blocks of the discovery zone.
14. The apparatus of claim 13 , wherein the apparatus further comprises:
communication circuitry to transmit a feedback message, which includes an indication of the RSRQ to the EUTRAN.