Techniques for sending or receiving channel state information reports associated with a coordinated multi-point scheme

• US 10,098,020 B2
• Filed: 03/14/2013
• Issued: 10/09/2018
• Est. Priority Date: 08/03/2012
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel Corporation
• Inventors: Davydov, Alexei, Morozov, Gregory V., Shirani-Mehr, Hooman, Maltsev, Alexander, Sergeyev, Vadim
• Primary Examiner(s): NGUYEN, DINH
• Application Number:
  US13/828,781
• Publication Number:
  US 20140038623A1
• Time in Patent Office: 2,035 Days
• Field of Search: 455450
• CPC Class Codes: H04B 17/27 for locating or positioning the transmitter
• CPC Class Codes: H04L 1/0013 Rate matching, e.g. puncturing or repetition of code symbols
• CPC Class Codes: H04L 41/0659 by isolating or reconfiguring faulty entities
• CPC Class Codes: H04L 41/082 the condition being updates or upgrades of network functionality
• CPC Class Codes: H04L 41/0836 to enhance reliability, e.g. reduce downtime
• CPC Class Codes: H04L 43/0811 by checking connectivity
• CPC Class Codes: H04L 45/306 Route determination based on the nature of the carried application
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 65/613 for the control of the source by the destination control signals issued by the client directed to the server or network components specially adapted for selective content distribution H04N21/637
• CPC Class Codes: H04L 65/80 Responding to QoS
• CPC Class Codes: H04L 67/51 Discovery or management thereof, e.g. service location protocol [SLP] or web services
• CPC Class Codes: H04L 67/75 Indicating network or usage conditions on the user display
• CPC Class Codes: H04N 21/23439 for generating different versions
• CPC Class Codes: H04N 21/25825 involving client display capabilities, e.g. screen resolution of a mobile phone optimising the visualisation of content during browsing in the Internet G06F16/9577; processing of terminal status or physical abilities in wireless networks H04W8/22; authentication in wireless network security H04W12/06
• CPC Class Codes: H04W 12/06 Authentication
• CPC Class Codes: H04W 16/18 Network planning tools
• CPC Class Codes: H04W 16/28 using beam steering
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 24/04 Arrangements for maintaining operational condition
• CPC Class Codes: H04W 36/142 over the same radio air interface technology
• CPC Class Codes: H04W 4/02 : Services making use of location information
• CPC Class Codes: H04W 4/70 : Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 40/20 : based on geographic position or location
• CPC Class Codes: H04W 40/246 : Connectivity information discovery
• CPC Class Codes: H04W 48/14 : using user query or user detection
• CPC Class Codes: H04W 48/18 : Selecting a network or a communication service
• CPC Class Codes: H04W 52/00 : Power management, e.g. TPC [Transmission Power Control], power saving or power classes gain control in transmitters or power amplifiers H03G3/3042
• CPC Class Codes: H04W 52/0209 : in terminal devices terminal devices per se H04W88/02
• CPC Class Codes: H04W 52/0212 : managed by the network, e.g. network or access point is master and terminal is slave
• CPC Class Codes: H04W 52/0216 : using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 52/0229 : where the received signal is a wanted signal
• CPC Class Codes: H04W 52/0258 : controlling an operation mode according to history or models of usage information, e.g. activity schedule or time of day
• CPC Class Codes: H04W 76/10 : Connection setup
• CPC Class Codes: H04W 76/11 : Allocation or use of connection identifiers
• CPC Class Codes: H04W 76/14 : Direct-mode setup
• CPC Class Codes: H04W 76/15 : Setup of multiple wireless link connections
• CPC Class Codes: H04W 76/16 : Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer
• CPC Class Codes: H04W 76/28 : Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: H04W 88/06 : adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

Examples are disclosed for sending or receiving channel state information (CSI) reports associated with coordinated multi-point (CoMP) schemes. The examples include user equipment (UE) constraining CSI feedback to one or more transmission points implementing a CoMP scheme with the UE. The examples also include a transmission point such as an evolved node B (eNB) triggering CSI feedback and receiving a CSI report in response to the trigger. The CSI report generated based on the UE constraining CSI feedback. Constraining CSI feedback may include the UE generating fewer CSI reports, reusing information between CSI reports or increasing an amount of time allowed for processing and generating CSI reports. Other examples are described and claimed.

Claims

1. A computer-implemented method comprising:

receiving, at user equipment (UE) capable of operating in compliance with one or more 3^rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) standards, a channel state information (CSI) processes set comprising three or more CSI processes, the CSI processes set associated with a coordinated multi-point (CoMP) scheme for the UE to receive coordinated signals from three or more transmission points, each of the three or more CSI processes corresponding to a respective one of the three or more transmission points;

generating two or more CSI reports using the CSI processes set based on constraining CSI feedback for implementing the CoMP scheme, constraining the CSI feedback to include;

selecting, by processing circuitry of the UE, two of the three or more transmission points to which the three or more CSI processes correspond; and

limiting a number of CSI reports based on only considering transmission cases for the two selected transmission points;

transmitting the two or more generated CSI reports to facilitate implementing the CoMP scheme;

constraining the CSI feedback to include increasing the amount of time for the UE to process the CSI processes set to generate the two or more CSI reports by;

determining a CSI value for a given CSI process based on the received CSI processes set at least N subframes prior to receiving a CSI trigger associated with a given one of the two or more CSI reports;

both generating and sending the given CSI report in K subframes after receiving the CSI trigger, where N and K equate to any positive whole integer; and

scaling a CSI report generation periodicity associated with each generated CSI report from among the two or more CSI reports such that the UE is capable of serially processing CSI processes sets respectively associated with each generated CSI report.

2. The computer-implemented method of claim 1 comprising:

receiving a CSI trigger; and

generating and transmitting the two or more CSI reports responsive to receiving the CSI trigger.

3. The computer-implemented method of claim 2, comprising receiving the CSI trigger from an evolved node B (eNB) from among the three or more transmission points and transmitting the two or more CSI reports to the eNB.

4. The computer-implemented method of claim 1, limiting the number of CSI reports based on only considering transmission cases for two of the three or more transmission points comprising:

selecting first and second transmission points based on respective strongest coordinated signals received from these first and second transmission points; and

generating a total of four CSI reports based on four transmission cases associated with transmissions received at the UE from the first and second transmission points.

5. The computer-implemented method of claim 4, the four transmission cases comprising interference from the first transmission point while the second transmission point is a serving transmission point, interference from the second transmission point while the first transmission point is the serving transmission point, no interference from the first transmission point while the second transmission point is the serving transmission point or no interference from the second transmission point while the first transmission point is the serving transmission point.

6. The computer-implemented method of claim 1, each of the three or more CSI processes to include a respective CSI interference measurement (CSI-IM) resource sent from an evolved node B (eNB) from among the three or more transmission points.

7. The computer-implemented method of claim 6, constraining the CSI feedback to include limiting a number of CSI-IM resources used to generate the two or more CSI reports based on only considering transmission cases for the two of the three or more transmission points.

8. The computer-implemented method of claim 1, constraining the CSI feedback to include reusing a given rank indicator (RI) for each generated CSI report, by:

determining, for one given CSI process from among the three or more CSI processes, the given RI by considering a configured 3GPP LTE codebookSubsetRestriction parameter, and

using the given RI to determine channel quality indicators (CQIs) and precoding matrix indicators (PMIs) of other given CSI processes from among the three or more CSI processes by considering other configured 3 GPP LTE codebookSubsetRestriction parameters for the other given CSI processes.

9. The computer-implemented method of 1, the CoMP scheme to include a joint transmission CoMP scheme, a dynamic point system/dynamic point blanking (DPS/DPB) CoMP scheme or a coordinated scheduling/coordinate beamforming (CS/CB) CoMP scheme.

10. An apparatus comprising:

a processor circuit for user equipment (UE) capable of operating in compliance with one or more 3^rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) standards;

a receive component for execution by the processor circuit to receive a coordinated multi-point (CoMP) measurement associated with a CoMP scheme for the UE to receive coordinated signals from three or more transmission points;

a generation component for execution by the processor circuit to generate two or more channel state information (CSI) reports using a CSI processes set associated with the CoMP scheme, the CSI processes set to comprise three or more CSI processes, each of the three or more CSI processes to correspond to a respective one of the three or more transmission points;

a constrain component for execution by the processor circuit to constrain CSI feedback for implementing the CoMP scheme, constraining the CSI feedback to include;

selecting two of the three or more transmission points to which the three or more CSI processes correspond; and

limiting a number of CSI reports based on only considering transmission cases for the two selected transmission points;

a report component for execution by the processor circuit to send the two or more generated CSI reports to facilitate implementing the CoMP scheme;

the receive component to receive a CSI trigger, the generation component to generate the two or more CSI reports in response to receipt of the CSI trigger, the constrain component to constrain the CSI feedback by increasing an amount of time for the generation component to generate the two or more CSI reports by;

allowing the generation component to determine a CSI value for a given CSI report using the CSI processes set at least N subframes prior to receiving the CSI trigger;

allowing the report component to send the given CSI report in K subframes after receiving the CSI trigger, where N and K equate to any positive whole integer; and

scaling a CSI report generation periodicity associated with each generated CSI report from among the two or more CSI reports such that the UE is capable of serially processing CSI processes sets respectively associated with each generated CSI report.

11. The apparatus of claim 10, the receive component to receive the CSI trigger from an evolved node B (eNB) from among the three or more transmission points and the report component to transmit the two or more CSI reports to the eNB.

12. The apparatus of claim 10, the constrain component to select first and second transmission points from among the three or more transmission points based on respective strongest coordinated signals received from these first and second transmission points and allow a total of four CSI reports to be generated by the generate component based on four transmission cases associated with transmissions received at the UE from the first and second transmission points.

13. The apparatus of claim 12, the four transmission cases comprising interference from the first transmission point while the second transmission point is a serving transmission point, interference from the second transmission point while the first transmission point is the serving transmission point, no interference from the first transmission point while the second transmission point is the serving transmission point or no interference from the second transmission point while the first transmission point is the serving transmission point.

14. The apparatus of claim 10, each of the three or more CSI processes to include a CSI interference measurement (CSI-IM) resource sent from an evolved node B (eNB) from among the three or more transmission points.

15. The apparatus of claim 14, the constrain component to constrain the CSI feedback by causing the generation component to reuse a given rank indicator (RI) for each generated CSI report, the generation component to determine, for one given CSI process from among the three or more CSI processes, the given RI considering a configured 3GPP LTE codebookSubsetRestriction parameter, and use the given RI to determine channel quality indicators (CQIs) and precoding matrix indicators (PMIs) of other given CSI processes from among the three or more CSI processes considering other configured 3GPP LTE codebookSubsetRestriction parameters for the other given CSI processes.

16. The apparatus of claim 10, comprising a digital display coupled to the processor circuit to present a user interface view.

17. At least one non-transitory computer-readable storage medium comprising a set of instructions that, in response to being executed at user equipment (UE) capable of operating in compliance with one or more 3^rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) standards, cause the UE to:

receive a coordinated multi-point (CoMP) measurement associated with a CoMP scheme for the UE to receive coordinated signals from three or more transmission points;

generate two or more channel state information (CSI) reports using a CSI processes set associated with the CoMP scheme, the CSI processes set to comprise three or more CSI processes, each of the three or more CSI processes to correspond to a respective one of the three or more transmission points;

constrain CSI feedback for implementing the CoMP scheme, constraining the CSI feedback to include;

selecting two of the three or more transmission points to which the three or more CSI processes correspond; and

limiting a number of CSI reports based on only considering transmission cases for the two selected transmission points;

send the two or more generated CSI reports to facilitate implementing the CoMP scheme;

the instructions, in response to being executed at the UE, to cause the UE to;

receive a CSI trigger from an evolved node B (eNB) comprised among the three or more transmission points;

generate the two or more CSI reports in response to receipt of the CSI trigger;

constrain the CSI feedback by increasing an amount of time for generation of the two or more CSI reports by;

allowing determination of a CSI value for a given CSI report using the CSI processes set at least N subframes prior to receiving the CSI trigger;

allowing the given CSI report to be sent within K subframes after receiving the CSI trigger, where N and K equate to any positive whole integer; and

scaling a CSI report generation periodicity associated with each generated CSI report from among the two or more CSI reports such that the UE is capable of serially processing CSI processes sets respectively associated with each generated CSI report; and

transmit the two or more CSI reports to the eNB.

18. The at least one non-transitory computer-readable storage medium of claim 17, comprising instructions that, in response to being executed at the UE, cause the UE to:

select first and second transmission points from among the three or more transmission points based on respective strongest coordinated signals received from these first and second transmission points; and

allow a total of four CSI reports to be generated based on four transmission cases associated with transmissions received at the UE from the first and second transmission points, the four transmission cases comprising interference from the first transmission point while the second transmission point is a serving transmission point, interference from the second transmission point while the first transmission point is the serving transmission point, no interference from the first transmission point while the second transmission point is the serving transmission point or no interference from the second transmission point while the first transmission point is the serving transmission point.

19. The at least one non-transitory computer-readable storage medium of claim 17, each of the three or more CSI processes to include a CSI interference measurement (CSI-IM) resource sent from an evolved node B (eNB) from among the three or more transmission points.

20. The at least one non-transitory computer-readable storage medium of claim 19, comprising instructions that, in response to being executed at the UE, cause the UE to constrain the CSI feedback by:

determining, for one given CSI process from among the three or more CSI processes, a given rank indicator (RI) considering a configured 3GPP LTE codebookSubsetRestriction parameter; and

using the given RI to determine channel quality indicators (CQIs) and precoding matrix indicators (PMIs) of other given CSI processes from among the three or more CSI processes considering other configured 3GPP LTE codebookSubsetRestriction parameters for the other given CSI processes.