Channel state information feedback in coordinated multi-point system

• US 8,737,514 B2
• Filed: 10/18/2012
• Issued: 05/27/2014
• Est. Priority Date: 11/04/2011
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel Corporation
• Inventors: Davydov, Alexei Vladimirovich, Zhu, Yuan, Li, Qinghua, Maltsev, Alexander Alexandrovich, Morozov, Gregory Vladimirovich
• Primary Examiner(s): LEE, SIU M
• Application Number:
  US13/655,184
• Publication Number:
  US 20130114658A1
• Time in Patent Office: 586 Days
• Field of Search: 375/267, 375/299, 375/295, 375/259, 375/260, 375/219, 375/220, 375/221
• US Class Current: 375/267
• CPC Class Codes: H04B 7/024 Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04J 11/00 Orthogonal multiplex systems, e.g. using WALSH codesH04J13/00 takes precedence
• CPC Class Codes: H04J 3/12 Arrangements providing for calling or supervisory signals
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0077 Cooperative coding
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 27/2646 using feedback from receiver for adjusting OFDM transmission parameters, e.g. transmission timing or guard interval length
• CPC Class Codes: H04L 27/2662 Symbol synchronisation
• CPC Class Codes: H04L 27/2675 Pilot or known symbols
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0078 Timing of allocation
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 52/0206 in access points, e.g. base stations access point devices per se H04W88/08
• CPC Class Codes: H04W 52/146 : Uplink power control
• CPC Class Codes: H04W 52/242 : taking into account path loss
• CPC Class Codes: H04W 52/244 : Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
• CPC Class Codes: H04W 52/34 : TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
• CPC Class Codes: H04W 56/0015 : one node acting as a reference for the others
• CPC Class Codes: H04W 68/02 : Arrangements for increasing efficiency of notification or paging channel
• CPC Class Codes: H04W 72/02 : Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/0446 : Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/12 : Wireless traffic scheduling
• CPC Class Codes: H04W 72/21 : in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 : in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/542 : using measured or perceived quality
• CPC Class Codes: H04W 76/11 : Allocation or use of connection identifiers
• CPC Class Codes: H04W 76/40 : for selective distribution or broadcast
• CPC Class Codes: H04W 84/14 : WLL [Wireless Local Loop]; RLL [Radio Local Loop]
• CPC Class Codes: H04W 88/02 : Terminal devices
• CPC Class Codes: H04W 88/08 : Access point devices
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

Embodiments of the present disclosure describe devices, methods, computer-readable media and systems configurations for communication of channel state information among network entities. In various embodiments, may calculate first-, second- and third-stage channel state information for nodes of a coordinated multipoint measurement set. Other embodiments may be described and/or claimed.

Claims

1. An apparatus comprising:

a channel estimation and feedback module (CEFM) to;

set a first rank for a plurality of nodes in coordinated multipoint (CoMP) measurement set, the plurality of nodes including a serving node to wirelessly communicate with a user equipment and one or more coordinating nodes to coordinate with the serving node to facilitate wireless communication with the user equipment;

calculate first-stage channel state information (CSI), including a first subband configuration, for the first rank;

calculate second-stage CSI for a second rank based on the first subband configuration, wherein the second rank is less than the first rank; and

calculate third-stage CSI for the first subband configuration and the first rank based on the second-stage CSI; and

a transmitter module to receive the third-stage CSI from the CEFM and to feed back the third-stage CSI to a selected node of the plurality of nodes.

2. The apparatus of claim 1, wherein the CEFM is to set the first rank equal to each of a number of candidate ranks to provide a plurality of iterations, and is further configured to:

calculate the first-stage, second-stage, and third-stage CSIs for each of the plurality of iterations; and

determine throughput associated with the third-stage CSIs from each of the plurality of iterations.

3. The apparatus of claim 2, wherein the CEFM is further configured to:

determine a value of the third-stage CSI from a first iteration of the plurality of iterations corresponds to a highest relative throughput; and

select the value for feeding back to the serving node.

4. The apparatus of claim 1, wherein the second rank equals one.

5. The apparatus of claim 1, wherein the CEFM is to calculate the third-stage CSI based on the second-stage CSI by being configured to:

extend the second-stage CSI to the third-stage CSI using a nested codebook structure.

6. The apparatus of claim 1, wherein each of the first-stage, second-stage, and third-stage CSIs include respective precoding matrix indicators (PMIs) and channel quality indications (CQIs).

7. The apparatus of claim 6, wherein a PMI of the second-stage CSI is a single vector and the CEFM is to calculate the third-stage CSI by being configured to:

select a PMI of the third-stage CSI to include the single vector.

8. The apparatus of claim 6, wherein a PMI of the second-stage CSI is a single vector and the CEFM is to calculate the third-stage CSI by being configured to:

select a PMI of the third-stage CSI to include a component vector that has a correlation with the single vector that is greater than a predetermined threshold.

9. The apparatus of claim 1, wherein the selected node is one of the one or more coordinating nodes.

10. The apparatus of claim 1, wherein the CEFM is to receive a signaling message from the serving node instructing the CEFM to calculate first-, second-, and third-stage CSI using receive processing weights for antennas of a user equipment independently calculated for different nodes of the CoMP measurement set.

11. The apparatus of claim 1, wherein the CEFM is to receive a signaling message from the serving node instructing CEFM to calculate first-, second-, and third-stage CSI using receiving processing weights for antennas of a user equipment common to each node of the CoMP measurement set.

12. The apparatus of claim 11, wherein the signaling message is a radio-resource control (RRC) signaling message.

13. The apparatus of claim 1, wherein the first-stage CSI includes a channel quality indicator based on quality of a channel between the user equipment and the serving node.

14. The apparatus of claim 1, wherein the second-stage CSI includes a channel quality indicator based on a quality of a channel between the user equipment and one or more of the cooperating nodes.

15. The apparatus of claim 1, wherein the apparatus comprises the user equipment and further comprises:

one or more antennas configured to feed back the third-stage CSI to the serving node.

16. The apparatus of claim 1, wherein the CEFM is to:

calculate the first-stage CSI for the serving node;

calculate the second-stage CSI for the one or more cooperating nodes; and

calculate the third-stage CSI for the one or more cooperating nodes.

17. The apparatus of claim 1, wherein the selected node is the serving node.

18. The apparatus of claim 1, wherein the transmitter module is to receive the first-stage CSI from the CEFM and to feed back the first-stage CSI to the serving node.

19. One or more non-transitory computer-readable media having instructions stored thereon, that, when executed cause a user equipment to:

calculate second-stage channel state information (CSI) for one or more coordinating nodes of a coordinated multipoint (COMP) measurement set based on first rank that is equal to one, the second-stage CSI include a precoding vector,

calculate a third-stage CSI for the one or more coordinating nodes based on a second rank that is greater than one, the third-stage CSI to include a plurality of precoding vectors with at least one component vector being the precoding vector or correlating to the precoding vectors;

set a first rank for a plurality of nodes in the CoMP measurement set including the one or more coordinating nodes and a serving node, and

calculate, for the serving node, first-stage CSI including a first subband configuration for the first rank.

20. The one or more non-transitory computer-readable media of claim 19, wherein the instructions, when executed, cause the user equipment to:

calculate the second-stage CSI based on the first subband configuration.

21. The one or more non-transitory computer-readable media of claim 19, wherein the instructions, when executed, cause the user equipment to:

calculate the second-stage CSI to include a channel quality indicator based on a quality of a channel between the user equipment and the serving node.

22. An apparatus comprising:

a receiver module configured to receive first and second channel state information (CSI) from user equipment;

a transmit control module (TCM) coupled to the receiver module and configured to;

determine, based on the first CSI, first transmission parameters, including one or more precoding vectors, to be used in downlink communications to the user equipment from a serving node of a coordinated multipoint (CoMP) system; and

determine, based on the second CSI and a type of the CoMP system, second transmission parameters, including at least one precoding vector, to be used in downlink communications by one or more coordinating nodes of the CoMP system; and

a transmitter module coupled to the TCM and configured to distribute the second transmission parameters to the one or more coordinating nodes.

23. The apparatus of claim 22, wherein the apparatus comprises a base station to operate as the serving node.

24. The apparatus of claim 23, wherein the first and second CSI are for a common rank.

25. The apparatus of claim 22, wherein the transmitter module is to distribute the second transmission parameters via a backhaul connection with the one or more coordinating nodes.