Method, apparatus and system for electrical downtilt adjustment in a multiple input multiple output system

• US 9,762,306 B2
• Filed: 06/27/2014
• Issued: 09/12/2017
• Est. Priority Date: 08/08/2013
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel IP Corporation (Intel Corporation)
• Inventors: Chen, Xiaogang, Zhu, Yuan, Xue, Feng, Shirani-Mehr, Hooman, Li, Qinghua
• Primary Examiner(s): Lai, Andrew
• Assistant Examiner(s): Henson, Jamaal
• Application Number:
  US14/911,262
• Publication Number:
  US 20160191135A1
• Time in Patent Office: 1,173 Days
• CPC Class Codes: E04G 23/0218 Increasing or restoring the load-bearing capacity of building construction elements E04G23/0203 and E04G23/0266 take precedence
• CPC Class Codes: E04H 9/025 Structures with concrete columns
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/0639 Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0058 Allocation criteria
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04L 5/0062 Avoidance of ingress interference, e.g. ham radio channels
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04W 16/26 Cell enhancers or enhancement, e.g. for tunnels, building shadow
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 36/0069 in case of dual connectivity, e.g. decoupled uplink/downlink
• CPC Class Codes: H04W 36/08 : Reselecting an access point
• CPC Class Codes: H04W 36/14 : Reselecting a network or an air interface
• CPC Class Codes: H04W 36/322 : by location data
• CPC Class Codes: H04W 4/023 : using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
• CPC Class Codes: H04W 4/70 : Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 4/80 : Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
• CPC Class Codes: H04W 48/12 : using downlink control channel
• CPC Class Codes: H04W 48/16 : Discovering, processing access restriction or access information
• CPC Class Codes: H04W 52/0206 : in access points, e.g. base stations access point devices per se H04W88/08
• CPC Class Codes: H04W 52/0209 : in terminal devices terminal devices per se H04W88/02
• CPC Class Codes: H04W 52/0219 : where the power saving management affects multiple terminals
• CPC Class Codes: H04W 56/0005 : synchronizing of arrival of multiple uplinks
• CPC Class Codes: H04W 64/006 : with additional information processing, e.g. for direction or speed determination
• 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 72/20 : Control channels or signalling for resource management
• CPC Class Codes: H04W 72/54 : based on quality criteria
• CPC Class Codes: H04W 72/541 : using the level of interference
• CPC Class Codes: H04W 74/0833 : Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 76/10 : Connection setup
• CPC Class Codes: H04W 76/14 : Direct-mode setup
• CPC Class Codes: H04W 76/27 : Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 8/005 : Discovery of network devices, e.g. terminals
• 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 88/02 : Terminal devices
• CPC Class Codes: H04W 88/04 : adapted for relaying to or from another terminal or user
• CPC Class Codes: H04W 88/08 : Access point devices
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

Machine-readable media, methods, apparatus and system for electrical downtilt adjustment in a multiple input multiple output system are disclosed. In some embodiments, an apparatus may comprise an electrical downtilt module to determine an electrical downtilt angle for an antenna port selected from a number of antenna ports based on information from an user equipment (UE); and a codebook module to select a codeword corresponding to the antenna port from a codebook and calculate a weight of an antenna array of the eNB through inputting the electronic downtilt angle into the codeword, wherein the codebook has a first number of codewords, each of the codewords having a second number of elements to represent the weight of the antenna array, and wherein each of the codewords corresponds to each of the antenna ports and each of the elements corresponds to each antenna of the antenna array.

Claims

1. An apparatus, comprising:

an electrical downtilt circuitry to determine an electrical downtilt angle for an antenna port selected from a number of antenna ports based on information from a user equipment (UE);

and a codebook circuitry to select a codeword corresponding to the antenna port from a codebook and calculate a weight of an antenna array of an eNodeB (eNB) through inputting the electrical downtilt angle into the codeword, wherein the codebook has a first number of codewords, each of the codewords having a second number of elements to represent the weight of the antenna array, and wherein each of the codewords corresponds to each of the antenna ports and each of the elements corresponds to each antenna of the antenna array.

2. The apparatus of claim 1, wherein the electrical downtilt angle is determined to reduce an antenna array gain for the antenna array at 90 degree elevation of departure (EoD).

3. The apparatus of claim 1, wherein the electrical downtilt angle is determined to increase a cell edge coupling loss for the UE.

4. The apparatus of claim 1, wherein the codeword is represented by a following equation:

5. The apparatus of claim 1, wherein the information received from the UE comprises the antenna port or a precoding matrix indicator (PMI) associated with the antenna port that the UE selects from the number of antenna ports based on channel state information reference signal (CSIRS) configuration information received from the eNB.

6. The apparatus of claim 5, further comprising:

a transceiver to transmit the CSIRS configuration information to the UE and to receive the information related to the antenna port from the UE.

7. The apparatus of claim 1, further comprising:

an antenna control circuitry to control the antenna array based on the weight calculated by the codebook circuitry.

8. A method, comprising:

determining an electrical downtilt angle for an antenna port selected from a number of antenna ports based on information from a user equipment (UE);

and selecting a codeword corresponding to the antenna port from a codebook and calculating a weight of an antenna array of an eNodeB (eNB) through inputting the electronic downtilt angle into the codeword, wherein the codebook has a first number of codewords, each of the codewords having a second number of elements to represent the weight of the antenna array, and wherein each of the codewords corresponds to each of the antenna ports and each of the elements corresponds to each antenna of the antenna array.

9. The method of claim 8, wherein the electrical downtilt angle is determined to reduce an antenna array gain for the antenna array at 90 degree elevation of departure (EoD).

10. The method of claim 8, wherein the electrical downtilt angle is determined to increase a cell edge coupling loss for the UE.

11. The method of claim 8, wherein the codeword is represented by a following equation:

12. The method of claim 8, wherein the information received from the UE comprises the antenna port or a precoding matrix indicator (PMI) associated with the antenna port that the UE selects from the number of antenna ports based on channel state information reference signal (CSIRS) configuration information received from the eNB.

13. The method of claim 12, further comprising:

transmitting the CSIRS configuration information to the UE and to receive the information related to the antenna port from the UE.

14. The method of claim 8, further comprising:

controlling the antenna array based on the weight calculated by a codebook circuitry.

15. A non-transitory computer readable medium encoded with computer executable instructions, which when accessed, causes a mobile station to perform operations comprising:

determining an electrical downtilt angle for an antenna port selected from a number of antenna ports based on information from a user equipment (UE);

and selecting a codeword corresponding to the antenna port from a codebook and calculating a weight of an antenna array of an eNodeB (eNB) through inputting the electrical downtilt angle into the codeword, wherein the codebook has a first number of codewords, each of the codewords having a second number of elements to represent the weight of the antenna array, and wherein each of the codewords corresponds to each of the antenna ports and each of the elements corresponds to each antenna of the antenna array.

16. The non-transitory computer readable medium of claim 15, wherein the electrical downtilt angle is determined to reduce an antenna array gain for the antenna array at a 90 degree elevation of departure (EoD).

17. The non-transitory computer readable medium of claim 15, wherein the electrical downtilt angle is determined to increase a cell edge coupling loss for the UE.

18. The non-transitory computer readable medium of claim 15, wherein the codeword is represented by a following equation:

19. The non-transitory computer readable medium of claim 15, wherein the information received from the UE comprises the antenna port or a precoding matrix indicator (PMI) associated with the antenna port that the UE selects from the number of antenna ports based on channel state information reference signal (CSIRS) configuration information received from the eNB.

20. The non-transitory computer readable medium of claim 19, further comprising:

transmitting the CSIRS configuration information to the UE and to receive the 15 information related to the antenna port from the UE.

21. The non-transitory computer readable medium of claim 15, further comprising:

controlling the antenna array based on the weight calculated by a codebook circuitry.