Enhanced physical downlink control channel (ePDCCH)

• US 9,226,278 B2
• Filed: 08/29/2012
• Issued: 12/29/2015
• Est. Priority Date: 03/16/2012
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel Corporation
• Inventors: Chen, Xiaogang, Zhu, Yuan, Li, Qinghua
• Primary Examiner(s): Rinehart, Mark
• Assistant Examiner(s): PASCUAL PEGUERO, NATALI
• Application Number:
  US13/598,320
• Publication Number:
  US 20130242770A1
• Time in Patent Office: 1,217 Days
• Field of Search: 370/252, 370/329
• US Class Current: 1/1
• CPC Class Codes: H04J 11/0073 Acquisition of primary synchronisation channel, e.g. detection of cell-ID within cell-ID group
• CPC Class Codes: H04L 1/0033 arrangements specific to the transmitter
• CPC Class Codes: H04L 1/0077 Cooperative coding
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 1/1607 Details of the supervisory signal
• CPC Class Codes: H04L 1/1635 Cumulative acknowledgement, i.e. the acknowledgement message applying to all previous messages
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1819 with retransmission of additional or different redundancy
• CPC Class Codes: H04L 1/1825 Adaptation of specific ARQ protocol parameters according to transmission conditions
• 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 1/1864 ARQ related signaling H04L1/1607 takes precedence
• CPC Class Codes: H04L 1/1877 for semi-reliable protocols, e.g. for less sensitive applications like streaming video buffer level management for video bitstream control arrangements H04N21/44004
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/189 Transmission or retransmission of more than one copy of a message
• CPC Class Codes: H04L 1/1896 ARQ related signaling
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• CPC Class Codes: H04L 12/2854 Wide area networks, e.g. public data networks
• CPC Class Codes: H04L 47/283 in response to processing delays, e.g. caused by jitter or round trip time [RTT]
• CPC Class Codes: H04L 47/6275 based on priority
• CPC Class Codes: H04L 5/001 : the frequencies being arranged in component carriers
• 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: H04L 5/1438 : Negotiation of transmission parameters prior to communication modified according to link quality H04L1/0001
• CPC Class Codes: H04L 5/1446 : of transmission speed
• CPC Class Codes: H04L 5/1469 : using time-sharing
• CPC Class Codes: H04L 65/75 : Media network packet handling
• CPC Class Codes: H04L 65/752 : adapting media to network capabilities
• CPC Class Codes: H04L 65/756 : adapting media to device capabilities
• CPC Class Codes: H04L 67/02 : based on web technology, e.g. hypertext transfer protocol [HTTP]
• CPC Class Codes: H04L 67/568 : Storing data temporarily at an intermediate stage, e.g. caching
• CPC Class Codes: H04N 21/25841 : involving the geographical location of the client retrieval from the Internet by querying based on geographical locations G06F16/9537; arrangements for identifying locations of receiving stations in broadcast systems H04H60/51; location of the user terminal in data switching networks H04L67/52; services making use of the location of users or terminals in wireless networks H04W4/02; locating users or terminals in wireless networks H04W64/00
• CPC Class Codes: H04N 21/41407 : embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop constructional details of equipment or arrangements specially adapted for portable computer application G06F1/1626; arrangements specially adapted for mobile receivers in broadcast systems H04H20/57
• CPC Class Codes: H04N 21/6405 : Multicasting data broadcast and multicast in packet switching networks H04L12/18
• CPC Class Codes: H04N 21/6408 : Unicasting
• CPC Class Codes: H04W 16/04 : Traffic adaptive resource partitioning
• CPC Class Codes: H04W 24/00 : Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 24/02 : Arrangements for optimising operational condition
• CPC Class Codes: H04W 28/0236 : radio quality, e.g. interference, losses or delay
• CPC Class Codes: H04W 28/0268 : using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR] negotiating SLA or negotiating QoS H04W28/24
• CPC Class Codes: H04W 28/0278 : using buffer status reports dynamic wireless traffic scheduling definition H04W72/12
• 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 52/02 : Power saving arrangements in wired systems H04L12/12; signaling of mobile application services, e.g. low battery notifications H04W4/20
• 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 52/0229 : where the received signal is a wanted signal
• CPC Class Codes: H04W 52/0235 : where the received signal is a power saving command
• CPC Class Codes: H04W 52/143 : Downlink power control
• CPC Class Codes: H04W 52/243 : taking into account interferences
• 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 72/12 : Wireless traffic scheduling
• CPC Class Codes: H04W 72/1268 : of uplink data flows
• CPC Class Codes: H04W 72/1273 : of downlink data flows
• CPC Class Codes: H04W 72/20 : Control channels or signalling for resource management
• 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 72/27 : between access points
• CPC Class Codes: H04W 72/51 : based on terminal or device properties
• CPC Class Codes: H04W 72/541 : using the level of interference
• CPC Class Codes: H04W 72/569 : of the traffic information
• CPC Class Codes: H04W 74/085 : collision avoidance
• 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: Y02D 30/70 : in wireless communication networks

Abstract

Technology for transmitting a distributed control channel element (CCE) for an enhanced physical downlink control channel (ePDCCH) and a localized CCE in a physical resource block (PRB) pair from a node and technology for physical downlink shared channel (PDSCH) physical resource block (PRB) allocation with at least one enhanced physical downlink control channel (ePDCCH) at a wireless device is disclosed. One method can include a node precoding at least one distributed CCE and at least one localized CCE for the PRB pair. The node can transmit the at least one distributed CCE for transmit diversity using at least two user equipment-specific reference signal (UERS) ports and transmitting the at least one localized CCE in the PRB pair. The at least two UERS ports can be used to transmit two CCEs.

Claims

1. A method for transmitting a distributed control channel element (CCE) for an enhanced physical downlink control channel (ePDCCH) and a localized CCE in a physical resource block (PRB) pair from a node, comprising:

precoding by the node at least one distributed CCE and at least one localized CCE for the PRB pair;

transmitting the at least one distributed CCE for transmit diversity using at least two user equipment-specific reference signal (UERS) ports and transmitting the at least one localized CCE in the PRB pair, wherein the at least two UERS ports are used to transmit two CCEs; and

applying a precoding vector w for beamforming to a UERS port for one of the localized CCE and applying a precoding vector orth(w) for transmit diversity to a UERS port for the distributed CCE, wherein orth(w) is a precoding vector that is orthogonal to w, and w and orth(w) are each an N_t×

1 vector, where N_t indicates the number of node transmit antennas, and the at least two UERS ports transmit the localized CCE precoded with precoding vector w and the distributed CCE precoded with precoding vector orth(w).

2. The method of claim 1 wherein the PRB pair includes one distributed CCE and at least three localized CCE.

3. The method of claim 1 wherein the PRB pair includes at least two distributed CCE and at least one localized CCE, and two precoding vectors for transmit diversity are applied to two UERS ports for the distributed CCEs.

4. The method of claim 3, wherein the two precoding vectors for spatial multiplexing are selected from the group consisting of precoding vectors w1, w2, w3, and w4, and each precoding vector is an N_t×

1 vector, where N_t indicates the number of node transmit antennas.

5. The method of claim 1, wherein the UERS ports are selected from the group consisting of UERS ports 7, 8, 9, and 10.

6. The method of claim 1, wherein the 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), and combinations thereof.

7. A wireless device configured to receive a distributed control channel element (CCE) and a localized CCE in a physical resource block (PRB) pair for at least one enhanced physical downlink control channel (ePDCCH), comprising:

a transceiver module to receive at least one distributed CCE for transmit diversity and at least one localized CCE in the PRB pair, wherein the at least two user equipment-specific reference signal (UERS) ports are used to receive two CCEs; and

a channel estimator configured to monitor the at least two UERS ports to estimate a downlink channel, wherein the channel estimator decodes a downlink channel precoded with a precoding vector w for beamforming applied to a UERS port for one of the localized CCE and the downlink channel precoded with a precoding vector orth(w) for transmit diversity applied to a UERS port for the distributed CCE, wherein orth(w) is a precoding vector that is orthogonal to w, and w and orth(w) are each an N_t×

1 vector, where N_t indicates the number of node transmit antennas.

8. The wireless device of claim 7, wherein the PRB pair includes one distributed CCE and at least three localized CCE.

9. The wireless device of claim 7, wherein the PRB pair includes at least two distributed CCE and at least one localized CCE, and the channel estimator decodes a downlink channel precoded with two precoding vector for transmit diversity applied to two UERS ports for the distributed CCEs.

10. The wireless device of claim 9, wherein the two precoding vectors for spatial multiplexing are selected from the group consisting of precoding vectors w1, w2, w3, and w4, and each precoding vector is an N_t×

1 vector, where N_t indicates the number of node transmit antennas.

11. The wireless device of claim 7, wherein the wireless device is selected from the group consisting of a user equipment (UE) and a mobile station (MS), and the wireless device includes at least one of an antenna, a touch sensitive display screen, a speaker, a microphone, a graphics processor, an application processor, internal memory, a non-volatile memory port, and combinations thereof.

12. At least one non-transitory machine readable storage medium comprising a plurality of instructions adapted to be executed to implement a method to receive a distributed control channel element (CCE) and a localized CCE in a physical resource block (PRB) pair for at least one enhanced physical downlink control channel (ePDCCH), comprising:

receiving at a transceiver module at least one distributed CCE for transmit diversity and at least one localized CCE in the PRB pair, wherein the at least two user equipment-specific reference signal (UERS) ports are used to receive two CCEs; and

monitoring with a channel estimator the at least two UERS ports to estimate a downlink channel, wherein the channel estimator decodes a downlink channel precoded with a precoding vector w for beamforming applied to a UERS port for one of the localized CCE and the downlink channel precoded with a precoding vector orth(w) for transmit diversity applied to a UERS port for the distributed CCE, wherein orth(w) is a precoding vector that is orthogonal to w, and w and orth(w) are each an N_t×

1 vector, where N_t indicates the number of node transmit antennas.

13. The at least one non-transitory machine readable storage medium of claim 12, wherein the PRB pair includes one distributed CCE and at least three localized CCE.

14. The at least one non-transitory machine readable storage medium of claim 12, wherein the PRB pair includes at least two distributed CCE and at least one localized CCE, and the channel estimator decodes a downlink channel precoded with two precoding vector for transmit diversity applied to two UERS ports for the distributed CCEs.

15. The at least one non-transitory machine readable storage medium of claim 14, wherein the two precoding vectors for spatial multiplexing are selected from the group consisting of precoding vectors w1, w2, w3, and w4, and each precoding vector is an N_t×

1 vector, where N_t indicates the number of node transmit antennas.

16. At least one non-transitory machine readable storage medium comprising a plurality of instructions adapted to be executed to implement a method for transmitting a distributed control channel element (CCE) for an enhanced physical downlink control channel (ePDCCH) and a localized CCE in a physical resource block (PRB) pair from a node, comprising:

precoding by the node at least one distributed CCE and at least one localized CCE for the PRB pair;

transmitting the at least one distributed CCE for transmit diversity using at least two user equipment-specific reference signal (UERS) ports and transmitting the at least one localized CCE in the PRB pair, wherein the at least two UERS ports are used to transmit two CCEs; and

applying a precoding vector w for beamforming to a UERS port for one of the localized CCE and applying a precoding vector orth(w) for transmit diversity to a UERS port for the distributed CCE, wherein orth(w) is a precoding vector that is orthogonal to w, and w and orth(w) are each an N_t×

1 vector, where N_t indicates the number of node transmit antennas, and the at least two UERS ports transmit the localized CCE precoded with precoding vector w and the distributed CCE precoded with precoding vector orth(w).

17. The at least one non-transitory machine readable medium of claim 16 wherein the PRB pair includes one distributed CCE and at least three localized CCE.

18. The at least one non-transitory machine readable medium of claim 16 wherein the PRB pair includes at least two distributed CCE and at least one localized CCE, and two precoding vectors for transmit diversity are applied to two UERS ports for the distributed CCEs.

19. The at least one non-transitory machine readable medium of claim 16, wherein the two precoding vectors for spatial multiplexing are selected from the group consisting of precoding vectors w1, w2, w3, and w4, and each precoding vector is an N_t×

1 vector, where N_t indicates the number of node transmit antennas.

20. The at least one non-transitory machine readable medium of claim 16, wherein the UERS ports are selected from the group consisting of UERS ports 7, 8, 9, and 10.

21. The at least one non-transitory machine readable medium of claim 16, wherein the 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), and combinations thereof.