Abstract
Certain aspects of the present disclosure provide techniques for measuring interference observed at a CoMP UE caused by neighbor base stations transmitting reference signals. The present disclosure provides a method for wireless communication comprising: determining at a user equipment UE served by at least one base station BS a reference signal RS configuration indicating resources on which one or more neighbor BSs transmit RS or data; estimating interference observed at the UE caused by the neighbor BSs based on RS or data transmitted by the neighbor BSs on the indicated resources; computing a channel state information CSI using said interference estimate; and sending the CSI to the serving BS for use in coordinating transmissions with the neighbor BSs.
Certain aspects of the present disclosure provide techniques for measuring interference observed at a CoMP UE caused by neighbor base stations transmitting reference signals. The present disclosure provides a method for wireless communication comprising: determining at a user equipment UE served by at least one base station BS a reference signal RS configuration indicating resources on which one or more neighbor BSs transmit RS or data; estimating interference observed at the UE caused by the neighbor BSs based on RS or data transmitted by the neighbor BSs on the indicated resources; computing a channel state information CSI using said interference estimate; and sending the CSI to the serving BS for use in coordinating transmissions with the neighbor BSs.
| Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
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Specification Information
Specification Information
Technologies
Family Information
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Resource configuration Coordinated Multi-point (CoMP)
Product
User Equipment (UE/Terminal)
Use Cases
Wireless communication
Services
Channel Quality Measurement/Estimation Interference estimate/measurement/randomization
Claim
1. A method for wireless communication, comprising:', 'determining, at a user equipment (UE) served by at least one base station (BS), a reference signal (RS) configuration indicating resources on which one or more neighbor BSs transmit RS or data;', 'estimating interference observed at the UE caused by the neighbor BSs, based on RS or data transmitted by the neighbor BSs on the indicated resources;', 'computing a channel state information (CSI) using said interference estimate; and', 'sending the CSI to the serving BS for use in coordinating transmissions with the neighbor BSs.
2. The method of claim 1, wherein:', 'the neighbor BSs use beamforming on the indicated resources; and', 'the CSI is sent to the serving BS for use in coordinating transmissions with the neighbor BSs.
3. The method of claim 1, wherein the RS comprises channel state information- reference signal (CSI-RS).
4. The method of claim 3, wherein the determining comprises decoding a value that indicates a particular CSI-RS configuration, provided by the serving BS.
5. The method of claim 4, wherein the particular CSI-RS configuration comprises a zero-power CSI-RS configuration for the serving cell.
6. The method of claim 4, further comprising receiving, from the serving BS, a muted CSI-RS configuration which is different than the muted CSI-RS configurations provided by adjacent BSs to their UEs.
7. The method of claim 6, wherein each BS mutes on both the CSI-RS', 'configuration provided to its own UEs and the CSI-RS configurations provided by adjacent BSs to their UEs.
8. The method of claim 4, wherein the UE is configured to use any transmission mode between 1 and 8 and uses the provided CSI-RS configuration.
9. The method of claim 1, wherein the RS configuration defines multiple resource elements (REs) per resource block (RB) per antenna port on which to estimate interference caused by the neighbor BSs
10. The method of claim 1, wherein multiple RS configurations are provided to the UE to estimate interference caused by the neighbor BSs
11. The method of claim 1 , wherein the estimating comprises:', 'receiving a bundling size indicating a number of consecutive physical resource blocks (PRBs) over which at least one of beams and transmit powers used by at least one neighbor BS remains constant; and', 'estimating interference assuming that interference can change drastically at the boundaries of said sets of consecutive PRBs
12. The method of claim 11 , wherein the UE receives the bundling size from the serving BS via a suitable radio resource control (RRC) information element
13. An apparatus for wireless communication, comprising:', 'means for determining, at a user equipment (UE), a reference signal (RS) configuration indicating resources on which one or more neighbor BSs transmit RS or data;', 'means for estimating interference observed at the UE caused by the neighbor BSs, based on RS or data transmitted by the neighbor BSs on the indicated resources; means for computing a channel state information (CSI) using said interference estimate; and', 'means for sending the CSI to the serving BS for use in coordinating transmissions with the neighbor BSs
14. The apparatus of claim 13, wherein:', 'the neighbor BSs use beamforming on the indicated resources; and the CSI is sent to the serving BS for use in coordinating beamformed transmissions with the neighbor BSs
15. The apparatus of claim 13, wherein the RS comprises channel state information- reference signal (CSI-RS)
16. The apparatus of claim 15, wherein the means for determining comprises means for decoding a value that indicates a particular CSI-RS configuration, provided by the serving BS
17. The apparatus of claim 16, wherein the particular CSI-RS configuration comprises a zero-power CSI-RS configuration for the serving cell
18. The apparatus of claim 16, further comprising means for receiving, from the serving BS, a muted CSI-RS configuration which is different than the CSI-RS configurations provided by adjacent BSs to their UEs
19. The apparatus of claim 18, wherein each BS mutes on both the CSI-RS configuration provided to its own UEs and the CSI-RS configurations provided by adjacent BSs to their UEs.
20. The apparatus of claim 16, wherein the UE is configured to use any transmission mode between 1 and 8 and uses the provided CSI-RS configuration.
21. The apparatus of claim 13, wherein the RS configuration defines multiple resource elements (REs) per resource block (RB) per antenna port on which to estimate interference caused by the neighbor BSs.
22. The apparatus of claim 13, wherein multiple RS configurations are provided to the UE to estimate interference caused by the neighbor BSs.
23. The apparatus of claim 13, wherein the means for estimating comprises:', 'means for receiving a bundling size indicating a number of consecutive physical resource blocks (PRBs) over which at least one of beams and transmit powers used by the neighbor BS remains constant; and', 'means for estimating interference assuming that interference can change drastically at the boundaries of said sets of consecutive PRBs.
24. The apparatus of claim 23, wherein the UE receives the bundling size from the serving BS via a suitable radio resource control (R C) information element.
25. An apparatus for wireless communication, comprising:', 'at least one processor adapted to:', 'determine, at a user equipment (UE) served by at least one serving base station (BS), a reference signal (RS) configuration indicating resources on which one or more neighbor BSs transmit RS or data;', 'estimate interference observed at the UE caused by the neighbor BSs, based on RS or data transmitted by the neighbor BSs on the indicated resources; compute a channel state information (CSI) using said interference estimate; and', 'send the CSI to the serving BS for use in coordinating transmissions with the neighbor BSs; and', 'a memory coupled to the at least one processor.
26. A computer-program product comprising a computer readable medium having instructions stored thereon, the instructions executable by one or more processors for: determining, at a user equipment (UE), a reference signal (RS) configuration indicating resources for which at least one serving base station (BS) refrains from transmitting to the UE while one or more neighbor BSs transmit RS or data;', 'estimating interference observed at the UE caused by the neighbor BSs, based on RS or data transmitted by the neighbor BSs on the indicated resources;', 'computing a channel state information (CSI) using said interference estimate; and', 'sending the CSI to the serving BS for use in coordinating transmissions with the neighbor BSs.']
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
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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.
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