STRUCTURED CODEBOOK FOR UNIFORM CIRCULAR ARRAY (UCA)

• US 20130336152A1
• Filed: 11/30/2011
• Published: 12/19/2013
• Est. Priority Date: 07/01/2011
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel Corporation
• Inventors: Zhu, Yuan, Li, Qinghua, Chen, Xiaogang
• Granted Patent: US 9,313,747 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04B 15/00 Suppression or limitation of noise or interference by means associated with receiver H04B1/10
• CPC Class Codes: H04B 7/0697 using spatial multiplexing
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 1/0038 Blind format detection for detection of modulation format H04L27/0012
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 1/06 using space diversity
• CPC Class Codes: H04L 27/34 Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
• CPC Class Codes: H04L 27/362 Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated H04L27/366 takes precedence
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• 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 52/0251 using monitoring of local events, e.g. events related to user activity
• 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 52/143 Downlink 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 52/325 : Power control of control or pilot channels
• CPC Class Codes: H04W 72/02 : Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/04 : Wireless resource allocation
• CPC Class Codes: H04W 72/0446 : Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/1215 : for collaboration of different radio technologies
• CPC Class Codes: H04W 72/20 : Control channels or signalling for resource management
• CPC Class Codes: H04W 72/23 : in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/541 : using the level of interference
• CPC Class Codes: H04W 76/19 : Connection re-establishment
• CPC Class Codes: H04W 76/28 : Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: H04W 8/02 : Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
• CPC Class Codes: H04W 84/042 : Public Land Mobile systems, e.g. cellular systems
• 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

Embodiments of the present disclosure describe method, apparatus, and system configurations that implement or otherwise use a codebook designed for antennas configured in a circular array. A method includes receiving, by user equipment (UE) from an enhanced node B (eNB) station of a wireless communication network, a Channel State Information Reference Signal (CSI-RS) for the UE to perform channel measurements of multiple antennas of the eNB station, wherein the multiple antennas are configured in one or more circular arrays, performing, by the UE, channel measurements of the multiple antennas of the eNB station using the received CSI-RS, and determining, by the UE, a code word based on the channel measurements, the code word being stored in a codebook designed for a circular antenna array. Other embodiments may be described and/or claimed.

Claims

1. A method comprising:

receiving, by user equipment (UE) from an enhanced node B (eNB) station of a wireless communication network, a Channel State Information Reference Signal (CSI-RS) for the UE to perform channel measurements of multiple antennas of the eNB station, wherein the multiple antennas are configured in one or more circular arrays;

performing, by the UE, channel measurements of the multiple antennas of the eNB station using the received CSI-RS; and

determining, by the UE, a code word based on the channel measurements, the code word being stored in a codebook designed for a circular antenna array.

2. The method of claim 1, further comprising:

sending, by the UE to the eNB station, a value that indicates the code word, the code word to facilitate beamforming between the eNB station and the UE.

3. The method of claim 2, wherein the codebook is a first codebook stored at the UE;

and

wherein sending, by the UE, the value includes sending an index of the code word for the eNB station to identify the code word in a second codebook stored at the eNB station.

4. The method of claim 1, wherein determining, by the UE, the code word includes selecting a code word that maximizes or minimizes a metric that is calculated using the channel measurements.

5. The method of claim 1, wherein receiving, by the UE, the CSI-RS includes receiving the CSI-RS for the UE to perform channel measurements for twelve antennas of the eNB station.

6. The method of claim 5, wherein the individual antennas include twelve antennas that are configured in a single circular array.

7. The method of claim 5, wherein the individual antennas include twelve antennas that are configured in three circular arrays.

8. The method of claim 1, wherein the code word, W, is a value defined by the following equation

9. An apparatus comprising:

an antenna;

a processor configured to communicate with an enhanced node B (eNB) station of wireless communication network via the antenna; and

a storage medium coupled to the processor, the storage medium having instructions stored thereon, that if executed by the processor, result in;

receiving, from the eNB station, a Channel State Information Reference Signal (CSI-RS) for the apparatus to perform channel measurements of twelve antennas of the eNB station, wherein the twelve antennas are configured in one or more circular arrays;

determining a code word based on channel measurements performed by the apparatus using the CSI-RS, the code word being stored in a codebook designed for a circular antenna array; and

sending, to the eNB station, a value that indicates the code word, the code word to facilitate beamforming between the eNB station and the apparatus.

10. The apparatus of claim 9, wherein the instructions, if executed, further result in:

performing the channel measurements of the twelve antennas of the eNB station using the received CSI-RS.

11. The apparatus of claim 9, wherein determining the code word includes selecting a code word that maximizes or minimizes a metric that is calculated at the apparatus using the channel measurements.

12. The apparatus of claim 9, wherein the codebook is a first codebook stored at the apparatus;

and

wherein sending, to the eNB station, the value includes sending an index of the code word for the eNB station to identify the code word in a second codebook stored at the eNB station.

13. The apparatus of claim 9, wherein receiving, from the eNB station, the CSI-RS includes receiving the CSI-RS for the apparatus to perform channel measurements for twelve antennas of the eNB station.

16. The apparatus of claim 9, wherein the code word, W, is a value defined by the following equation

14. (canceled)

15. (canceled)

17. A method comprising:

configuring, by a base station of a wireless communication network, a user equipment (UE) with a Channel State Information Reference Signal (CSI-RS) for performing channel measurements of twelve antennas of the base station, wherein the twelve antennas are configured in one or more circular arrays; and

receiving, by the base station from the UE, a value that indicates a code word of a codebook designed for a circular antenna array, the code word being used by the base station to facilitate beamforming between the base station and the UE, the code word being based on the channel measurements performed by the UE using the configured CSI-RS.

18. The method of claim 17, further comprising:

using, by the base station, the code word to facilitate beamforming between the base station and the UE.

19. The method of claim 17, wherein configuring, by the base station, the UE with CSI-RS includes configuring the UE with a twelve antenna port CSI-RS pattern for the twelve antennas of the base station.

22. The method of claim 17, wherein the code word, W, is a value defined by the following equation

23. The method of claim 22, wherein the codebook for the circular antenna array is designed at least in part by:

selecting a codebook size, L;

calculating L/2 number of code words of a first group using the following equation

24. The method of claim 22, wherein the base station is an enhanced node B (eNB) base station of an Internet Protocol (IP) based network and the UE is a mobile device.

20. (canceled)

21. (canceled)

25. A system comprising:

a processor configured to communicate with user equipment (UE) via an enhanced node B (eNB) station of a wireless communication network; and

a storage medium coupled to the processor, the storage medium having instructions stored thereon, that if executed by the processor, result in;

configuring the UE with a Channel State Information Reference Signal (CSI-RS) for performing channel measurements of multiple antennas of the eNB station, wherein the multiple antennas are configured in one or more uniform circular arrays;

receiving, from the UE, a value that indicates a code word of a codebook designed for a circular antenna array, the code word being based on the channel measurements performed by the UE using the configured CSI-RS; and

establishing a link between the eNB station and the UE using the code word to facilitate beamforming between the eNB station and the UE.

26. The system of claim 25, wherein configuring the UE with the CSI-RS includes sending to the UE the CSI-RS for twelve antennas of the eNB station.

27. The system of claim 26, wherein the twelve antennas are configured in a single roughly circular array.

28. The system of claim 26, wherein the twelve antennas are configured in three roughly circular arrays.

29. The system of claim 25, wherein the code word, W, is a value defined by the following equation

30. (canceled)