Information signalling for network assisted interference mitigation

• US 10,003,367 B2
• Filed: 12/03/2013
• Issued: 06/19/2018
• Est. Priority Date: 12/03/2012
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel Corporation
• Inventors: Davydov, Alexei, Han, Seunghee, Morozov, Gregory, Maltsev, Alexander, Bolotin, Ilya
• Primary Examiner(s): MEW, KEVIN D
• Application Number:
  US14/440,337
• Publication Number:
  US 20150295695A1
• Time in Patent Office: 1,659 Days
• CPC Class Codes: H04B 1/12 Neutralising, balancing, or compensation arrangements
• CPC Class Codes: H04B 1/3827 Portable transceivers
• CPC Class Codes: H04B 17/24 with feedback of measurements to the transmitter
• CPC Class Codes: H04B 17/26 using historical data, averaging values or statistics
• 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 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/15557 Selecting relay station operation mode, e.g. between amplify and forward mode, decode and forward mode or FDD - and TDD mode
• CPC Class Codes: H04J 11/005 of intercell interference
• CPC Class Codes: H04J 11/0053 using co-ordinated multipoint transmission/reception co-ordinated antenna or beam-forming aspects H04B7/022
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0054 Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1867 Arrangements specially adapted for the transmitter end
• CPC Class Codes: H04L 25/0202 Channel estimation
• CPC Class Codes: H04L 25/0204 of multiple channels
• CPC Class Codes: H04L 25/03305 Joint sequence estimation and interference removal joint detection of several desired signals H04L25/03331
• CPC Class Codes: H04L 27/0008 arrangements for allowing a transmitter or receiver to use more than one type of modulation negotiating modulation type for two-way transmission paths H04L5/1453
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• 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 5/0057 : Physical resource allocation for CQI
• CPC Class Codes: H04L 5/0058 : Allocation criteria
• CPC Class Codes: H04L 5/0092 : Indication of how the channel is divided
• 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 36/10 : Reselecting an access point controller
• CPC Class Codes: H04W 40/16 : based on interference
• CPC Class Codes: H04W 52/0261 : managing power supply demand, e.g. depending on battery level
• CPC Class Codes: H04W 52/40 : during macro-diversity or soft handoff
• CPC Class Codes: H04W 72/12 : Wireless traffic scheduling
• CPC Class Codes: H04W 72/121 : for groups of terminals or users
• 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 72/51 : based on terminal or device properties
• CPC Class Codes: H04W 72/52 : based on load
• 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 72/566 : of the information or information source or recipient
• CPC Class Codes: H04W 72/569 : of the traffic information
• 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 76/28 : Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: H04W 84/042 : Public Land Mobile systems, e.g. cellular systems
• CPC Class Codes: H04W 84/18 : Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: H04W 92/18 : between terminal devices
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

Methods and apparatuses for communicating in a wireless network include provision of interfering signal characteristics information to a user equipment to facilitate suppression of an interfering signal present in a downlink signal being received at the user equipment.

Claims

1. A method of mitigating interference at a user equipment in a wireless communication system, the method comprising:

receiving, at the user equipment, a physical downlink shared channel (PDSCH) in the presence of an interfering signal;

receiving, at the user equipment from a serving eNodeB, Downlink Control Information (DCI) to provide information defining characteristics of the interfering signal; and

suppressing interference caused to the PDSCH by the interfering signal based on the information defining characteristics of the interfering signal.

2. The method of claim 1, wherein information defining characteristics of the interfering signal comprises a modulation format, a presence and characteristics of interference, a transmission scheme, one or more reference symbols of the interfering signal, or a modulation or coding scheme of the interfering signal.

3. The method of claim 1, wherein the DCI comprises an interference resource block assignment.

4. The method of claim 1, wherein the DCI is DCI format 2C.

5. An apparatus for use in a wireless communication system, the apparatus comprising:

communication circuitry to;

receive, from a serving eNodeB in Downlink Control Information (DCI), interfering signal characteristics information; and

receive a physical downlink shared channel (PDSCH) in the presence of an interfering signal; and

interference mitigation circuitry coupled to the communication circuitry, the interference mitigation circuitry to suppress interference caused to the PDSCH by the interfering signal based on the interfering signal characteristics information.

6. The apparatus of claim 5, wherein the interfering signal characteristics information comprises a modulation format, a presence and characteristics of interference, a transmission scheme, one or more reference symbols of the interfering signal, or a modulation or coding scheme of the interfering signal.

7. The apparatus of claim 5, wherein the DCI includes an interference resource block assignment.

8. The apparatus of claim 7, wherein the interference resource block assignment indicates one or more physical resource blocks (PRBs) associated with the interfering signal.

9. The apparatus of claim 5, wherein the interfering signal characteristics information comprises demodulation reference signal (DM-RS) parameters associated with the interfering signal.

10. The apparatus of claim 5, further comprising decoding circuitry to jointly decode the PDSCH and the interfering signal based on the interfering signal characteristics information.

11. The apparatus of claim 5, wherein the DCI is DCI format 2C.

12. The apparatus of claim 11, wherein the communication circuitry is to receive interfering signal characteristics information by receiving a Radio Network Temporary Identifier (RNTI) and monitoring a control channel search space for the DCI based on the received RNTI.

13. The apparatus of claim 12, wherein the RNTI is associated with a second apparatus, the second apparatus associated with the interfering signal.

14. The apparatus of claim 11, wherein the communication circuitry is to receive a cell ID associated with a neighbouring cell and to monitor a control channel associated with the neighbouring cell.

15. The apparatus of claim 11, wherein a user equipment and a second user equipment are associated with a same control channel search space and are associated with a common cell ID;

and wherein a size of DCI contents received by each apparatus are the same.

16. The apparatus of claim 12, wherein the RNTI comprises an Interference-Assistance RNTI (IA-RNTI) associated with a control channel search space dedicated to interference information.

17. The apparatus of claim 5, wherein the PDSCH is a first PDSCH and the interfering signal comprises a second PDSCH associated with a second apparatus.

18. A circuit for use in an eNodeB in a wireless communication system, the circuit comprising:

communication circuitry to transmit a first physical downlink shared channel (PDSCH) to a first user equipment;

interference management circuitry coupled to the communication circuitry, the interference management circuitry to identify downlink signals in the wireless communication system that are expected to interfere with the PDSCH transmitted to the first user equipment; and

wherein the communication circuitry is further to transmit to the first user equipment Downlink Control Information (DCI) including interfering signal characteristics information relating to any downlink signals that are identified by the interference management circuitry to be expected to interfere with the PDSCH to the first user equipment.

19. The circuit of claim 18, wherein the interfering signal characteristics information comprises a modulation format, a presence and characteristics of interference, a transmission scheme, one or more reference symbols of the interfering signal, or a modulation or coding scheme of the interfering signal.

20. One or more non-transient computer readable media comprising computer program instructions that when executed implement a method comprising:

receiving, at a user equipment, a physical downlink shared channel (PDSCH) in the presence of an interfering signal;

receiving, at the user equipment from a serving eNodeB, Downlink Control Information (DCI) to provide information defining characteristics of the interfering signal; and

suppressing interference caused to the PDSCH by the interfering signal based on the information defining characteristics of the interfering signal.

21. The one or more non-transient computer readable media of claim 20, wherein information defining characteristics of the interfering signal comprises a modulation format, a presence and characteristics of interference, a transmission scheme, one or more reference symbols of the interfering signal, or a modulation or coding scheme of the interfering signal.

22. The one or more non-transient computer readable media of claim 20, wherein the DCI comprises an interference resource block assignment.

23. The one or more non-transient computer readable media of claim 20, wherein the DCI is DCI format 2C.