Abstract
Embodiments of the present disclosure provide an uplink power control method, a user equipment and a base station. The method comprises: receiving configuration information of a channel state information reference signal CSI-RS from the base station, wherein the configuration information of the CSI-RS comprises reference signal port information and reference signal power information; and measuring a path loss for uplink power control based on the configuration information of the CSI-RS. The embodiments of the present disclosure use the CSI-RS to measure the path loss, which differs from a common CRS in that the CSI-RS may aim at a specific base station. Therefore, path loss measurement may be performed in respect of a target base station of uplink transmission, enabling the path loss compensation to match the actual path loss, thus improving the performance of uplink power control.
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Specification Information
Specification Information
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Technologies
Channel State Information – Reference Signal(CSI-RS)
Power Control
Product
User Equipment (UE/Terminal)
Use Cases
Services
Claim
1. An uplink power control method, comprising:
receiving configuration information of a channel state information reference signal (CSI-RS) from a base station, wherein the configuration information of the CSI-RS comprises reference signal port information and reference signal power information; determining multiple antenna ports to be measured based on the reference signal port information; measuring a reference signal receiving power (RSRP) of the CSI-RS on the multiple antenna ports; and determining a path loss according to the measured RSRP and the reference signal power information, wherein determining the path loss according to the measured RSRP and the reference signal power information comprises calculating the path loss (PLtarget) for uplink power control according to a formula:
PL
target
=
-
10
?
?
log
?
?
i
?
?
i
?
10
PL
i
10
wherein PLi is a path loss corresponding to an antenna port, and ?i is a weight factor.
2. The method according to claim 1, wherein the configuration information further comprises an identification bit for indicating function of the reference signal port information, and
when the identification bit indicates that the reference signal port information is used for channel state information measurement, the method further comprises measuring the channel state information on the multiple antenna ports indicated by the reference signal port information.
3. The method according to claim 2, wherein the identification bit is transmitted through a dynamic signaling or a high-layer signaling.
4. The method according to claim 1, wherein the reference signal port information comprises a set of path loss measurement indications of respective antenna ports.
5. The method according to claim 1, wherein the reference signal port information comprises a set of RSRP measurement indications of respective antenna ports and CSI-RS muting information configured by the base station.
6. The method according to claim 1,
wherein the reference signal port information comprises a set of RSRP measurement indications of respective antenna ports and a subset selection indication of the set of RSRP measurement indications of respective antenna ports; wherein the set of the RSRP measurement indications of respective antenna ports comprises a reference signal port bitmap of CSI-RS configurations of one antenna port, or comprises a concatenation of reference signal port bitmaps of CSI-RS configurations of a plurality of the antenna ports; and wherein the subset selection indication of the set of RSRP measurement indications of respective antenna ports comprises an indication bitmap corresponding to the set of RSRP measurement indications of respective antenna ports.
7. A user equipment, comprising:
a receiver configured to receive configuration information of a channel state information reference signal (CSI-RS) from a base station, wherein the configuration information of the CSI-RS comprises reference signal port information and reference signal power information; and a processor configured to:
determine multiple antenna ports to be measured based on the reference signal port information,
measure a reference signal receiving power (RSRP) of the CSI-RS on the multiple antenna ports, and
determine a path loss according to the measured RSRP and the reference signal power information, wherein determining the path loss according to the measured RSRP and the reference signal power information comprises calculating the path loss (PLtarget) for uplink power control according to a formula:
PL
target
=
-
10
?
?
log
?
?
i
?
?
i
?
10
PL
i
10
wherein PLi is a path loss corresponding to an antenna port, and ?i is a weight factor.
8. The user equipment according to claim 7, wherein the configuration information received by the receiver further comprises an identification bit for indicating function of the reference signal port information, and
when the identification bit indicates that the reference signal port information is used for channel state information (CSI) measurement, the processor is further configured to measure the CSI on the multiple antenna ports indicated by the reference signal port information.
9. The user equipment according to claim 7, wherein the identification bit is transmitted through a dynamic signaling or a high-layer signaling.
10. The user equipment according to claim 7, wherein the reference signal port information comprises a set of path loss measurement indications of respective antenna ports.
11. The user equipment according to claim 7, wherein the reference signal port information comprises a set of RSRP measurement indications of respective antenna ports and CSI-RS muting information configured by the base station.
12. The user equipment according to claim 7,
wherein the reference signal port information comprises a set of RSRP measurement indications of respective antenna ports and a subset selection indication of the set of RSRP measurement indications of respective antenna ports; wherein the set of the RSRP measurement indications of respective antenna ports comprises a reference signal port bitmap of CSI-RS configurations of one antenna port, or comprises a concatenation of reference signal port bitmaps of CSI-RS configurations of a plurality of the antenna ports; and wherein the subset selection indication of the set of RSRP measurement indications of respective antenna ports comprises an indication bitmap corresponding to the set of RSRP measurement indications of respective antenna ports.
Associated Portfolios
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
The information in grey was provided by the patent holder
The information in purple was extracted from the FrandAvenue
Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.