Simultaneous transmit and receive

• US 9,397,795 B2
• Filed: 06/27/2013
• Issued: 07/19/2016
• Est. Priority Date: 07/02/2012
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel Corporation
• Inventors: Choi, Yang-Seok
• Primary Examiner(s): Vu, Hoang-Chuong
• Application Number:
  US14/125,253
• Publication Number:
  US 20150049650A1
• Time in Patent Office: 1,118 Days
• US Class Current: 1/1
• CPC Class Codes: H04B 17/345 Interference values signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] H04B17/336
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0848 Joint weighting
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/1628 List acknowledgements, i.e. the acknowledgement message consisting of a list of identifiers, e.g. of sequence numbers H04L1/1614 takes precedence
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• 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 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• 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 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 28/0205 at the air interface dynamic wireless traffic scheduling H04W72/12
• CPC Class Codes: H04W 28/08 Load balancing or load distribution transferring a connection for handling the traffic H04W36/22; wireless traffic scheduling H04W72/12
• CPC Class Codes: H04W 36/22 for handling the traffic
• CPC Class Codes: H04W 4/70 : Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 48/12 : using downlink control channel
• 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 52/0212 : managed by the network, e.g. network or access point is master and terminal is slave
• CPC Class Codes: H04W 52/0245 : according to signal strength
• CPC Class Codes: H04W 52/243 : taking into account interferences
• CPC Class Codes: H04W 52/383 : power control in peer-to-peer links
• CPC Class Codes: H04W 68/00 : User notification, e.g. alerting and paging, for incoming communication, change of service or the like
• CPC Class Codes: H04W 72/0446 : Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/046 : the resource being in the space domain, e.g. beams
• 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 72/30 : Resource management for broadcast services
• CPC Class Codes: H04W 88/08 : Access point devices
• CPC Class Codes: H04W 92/02 : Inter-networking arrangements
• CPC Class Codes: Y02D 30/70 : in wireless communication networks
• CPC Class Codes: Y02E 40/60 : Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment

Abstract

A simultaneous transmit and receive technology is described. A downlink transmission and an uplink receive beam are formed at a base station (BS) having a beam pattern with predetermined nulls. The predetermined nulls are formed over predetermined elevation angles to reduce interference with a proximate BS. Transmission and reception occur simultaneously using the beam pattern from the BS.

Claims

1. A base station (BS) in a wireless cellular network, comprising:

a beam forming device that is configured to form a transmission and a reception beam having a beam pattern with predetermined nulls, wherein the predetermined nulls are formed over selected elevation angles to reduce interference to and from proximate base stations (BSs);

a simultaneous transmit and receive (STR) device that is configured to communicate with a transceiver of the base station that is configured to communicate with a user equipment (UE) in a full-duplex mode enabling the transceiver to simultaneously transmit and receive; and

a weighting device that is configured to weight antenna elements in a planar array antenna of the base station to form the predetermined nulls over the selected elevation angles using, M vertically stacked antenna elements that are vertically weighted using;

2. The BS of claim 1, wherein the beam forming device includes a planar array of antenna elements.

3. The BS of claim 2, wherein the antenna elements in the planar array are spaced half a width of a wave length of the transmission beam apart.

4. The BS of claim 1, wherein a predetermined main beam is formed with a 15 degree electrical down tilting relative to a horizon.

5. The BS of claim 1, wherein the predetermined nulls are formed between 89 and 91 degrees.

6. A wireless node operable to perform full duplex communication, having computer circuitry comprising:

a beam forming device that is configured to form a downlink transmission beam and an uplink reception beam having a beam pattern with predetermined nulls, wherein the predetermined nulls are formed over selected elevation angles to reduce interference to and from proximate wireless nodes;

a transmit device that is configured to transmit using the beam pattern with a transceiver of the wireless node;

a receive device that is configured to receive an uplink transmission at the wireless node while simultaneously transmitting; and

a weight device that is configured to weight antenna elements in a planar array antenna of the wireless node to form the predetermined nulls over the selected elevation angles using, M vertically stacked antenna elements that are vertically weighted using;

7. The wireless node of claim 6, wherein the transmission and reception beams are formed using a planar array of antenna elements.

8. The wireless node of claim 7, wherein the planar array of antenna elements are spaced apart approximately half of a width of a wave length of the transmission beam.

9. The wireless node of claim 6, wherein a backlobe of the transmission beam and the receive beam are scaled down by at least 25 dB.

10. The wireless node of claim 6, wherein a predetermined main beam is formed with 15 degrees electrical down tilting relative to a horizon.

11. The wireless node of claim 6, wherein the wireless node is selected from the group consisting of a base station (BS), a Node B (NB), an evolved Node B (eNB), a baseband unit (BBU), a remote radio head (RRH), a remote radio equipment (RRE), a remote radio unit (RRU), or a central processing module (CPM).

12. A method for reducing interference between base stations (BSs) in a wireless cellular network operating with simultaneous transmission and reception, comprising:

forming a downlink transmission and an uplink receive beam at a base station (BS) having a beam pattern with predetermined nulls, wherein the predetermined nulls are formed over predetermined elevation angles to reduce interference with a proximate BS; and

transmitting and receiving using the beam pattern from the base station,

wherein transmitting and receiving occur simultaneously, and forming the downlink transmission and uplink reception beam having the predetermined nulls further comprises vertically weighting m vertically stacked antenna elements using;

13. The method of claim 12, wherein the downlink transmission and uplink reception beam is formed using a planar array of antenna elements.

14. The method of claim 13, wherein antenna elements in the planar array of antenna elements are spaced apart half a width of a wave length of the downlink transmission beam.

15. The method of claim 12, wherein a backlobe of the downlink transmission beam and the uplink receive beam is scaled down by at least 25 dB.

16. The method of claim 12, wherein the predetermined nulls are formed over an entire azimuth angle at the predetermined elevation angles φ

_m,m≠

0, wherein m is an index of nulls into M vertically stacked antenna elements and φ

_m are predetermined elevation angles.

17. The method of claim 12, wherein the transmission and the reception at the base station is performed using a multiple-in-multiple-out (MIMO) technique.

18. The method of claim 12, wherein a predetermined main beam φ

₀ is formed with 15 degrees electrical down tilting relative to a horizon.

19. The method of claim 12, wherein the predetermined nulls are formed between elevation angles of about 89 and 91 degrees.

20. At least one non-transitory machine readable storage medium comprising a plurality of instructions adapted to be executed to implement the method of claim 12.