Mapping an enhanced physical downlink control channel

• US 9,642,180 B2
• Filed: 12/20/2011
• Issued: 05/02/2017
• Est. Priority Date: 07/01/2011
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel Corporation
• Inventors: Chen, Xiaogang, Zhu, Yuan, Li, Qinghua
• Primary Examiner(s): Nguyen, Thai
• Application Number:
  US13/994,113
• Publication Number:
  US 20140126487A1
• Time in Patent Office: 1,960 Days
• 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

Technology for mapping an enhanced physical downlink control channel to physical resource blocks in a radio frame is disclosed. One method comprises mapping modulated symbols in the ePDCCH to at least one control channel element. The at least one control channel element can be mapped to resource elements located in a plurality of distributed physical resource blocks in a subframe, wherein each resource block is separated by at least one additional resource block in the subframe. The mapping can also be to resource elements distributed in a single resource block in the subframe, wherein the control channel element is mapped to be distributed in frequency and time relative to other mapped resource elements in the single resource block.

Claims

1. A method for mapping an enhanced physical downlink control channel (ePDCCH) to physical resource blocks in a radio frame at an enhanced Node B (eNB), comprising:

mapping modulated symbols at the eNB in the ePDCCH to at least one control channel element (CCE);

mapping the at least one CCE to resource elements (REs) located in a plurality of distributed physical resource blocks (PRBs) in a subframe of the radio frame, wherein each physical resource block is separated by at least one additional physical resource block in the subframe of the radio frame; and

applying the mapping of the at least one CCE to the REs to control data for scheduling to form the ePDCCH configured to be communicated from the eNB to a user equipment (UE).

2. The method of claim 1, further comprising mapping the modulated symbols in the ePDCCH to at least one consecutive CCE.

3. The method of claim 1, further comprising mapping the at least one control channel element to resource elements located in the plurality of physical resource blocks in the subframe, wherein each physical resource block is contiguous in frequency.

4. The method of claim 1, further comprising mapping the at least one control channel element to the resource elements located in the plurality of physical resource blocks in the subframe and to a single physical resource block in the subframe, wherein the single physical resource block contains both contiguous resource elements and resource elements distributed in frequency and time to which the at least one control channel element is mapped.

5. The method of claim 1, further comprising forming an individual index of the at least one control channel elements that are mapped to the resource elements in the physical resource blocks in the subframe.

6. The method of claim 1, further comprising forming distributed resource element groups in one of the plurality of physical resource blocks, wherein each distributed resource element group consists of resource elements distributed in time and frequency.

7. The method of claim 1, further comprising applying the mapping to the control data for scheduling to form the ePDCCH configured to be communicated from the eNB to the UE, wherein the UE includes a microphone, an audio speaker, a liquid crystal display (LCD) screen, an organic light emitting display screen (OLED), a touch sensitive screen, or a non-volatile memory port.

8. An enhanced Node B (eNB) operable to apply mapping to control data operable to form an enhanced physical downlink control channel (ePDCCH) configured to be communicated to a user equipment (UE) in a radio frame, wherein the eNB comprises:

one or more processors and memory configured to;

map modulated symbols in the ePDCCH to at least one control channel element (CCE);

map the at least one CCE to resource elements located in a plurality of distributed physical resource blocks in a subframe of the radio frame and to a single physical resource block in the subframe of the radio frame, wherein the single physical resource block contains both contiguous resource elements and resource elements distributed in frequency and time to which the at least one control channel element is mapped; and

apply a mapping of the at least one CCE to the resource elements to control data for scheduling to form an ePDCCH configured to be communicated from the eNB to a user equipment UE.

9. The eNB of claim 8, wherein the modulated symbols in the ePDCCH are mapped to at least one consecutive CCE.

10. The eNB of claim 8, wherein the at least one control channel element is mapped to resource elements in a single physical resource block pair in the subframe, wherein the control channel element is mapped in frequency and time to the resource elements in the single physical resource block pair.

11. The eNB of claim 10, wherein the modulated symbols in the ePDCCH are mapped to the single physical resource block pair, wherein the control channel element is mapped across a slot boundary in the physical resource block pair.

12. The eNB of claim 8, further comprising an individual index of the at least one control channel elements that are mapped to the resource elements in the physical resource block in the subframe.

13. The eNB of claim 8, wherein the ePDCCH is configured to be communicated from the eNB to the UE, wherein the UE includes a microphone, an audio speaker, a liquid crystal display (LCD) screen, an organic light emitting display screen (OLED), a touch sensitive screen, or a non-volatile memory port.

14. An article, comprising a non-transitory computer-readable storage medium containing instructions that if executed by a processor in an enhanced Node B (eNB), enable a system to:

apply mapping to control data operable to form an enhanced physical downlink control channel (ePDCCH) configured to be communicated from the eNB, to a user equipment (UE) in a radio frame, wherein the mapping is formed, using the processor in the eNB, by;

mapping modulated symbols in the ePDCCH to at least one of at least one localized control channel element and at least one distributed control channel element, wherein;

the at least one localized control channel element is mapped within multiple distributed physical resource blocks that are contiguous in the frequency domain on a subframe of the radio frame; and

the at least one distributed control channel element is mapped to distributed resource elements in at least one physical resource block in the subframe of the radio frame.

15. The article of claim 14, further comprising instructions that when executed by a processor enable the system to:

apply mapping to control data operable to form the ePDCCH configured to be communicated from the eNB to the UE in the radio frame, wherein the mapping is formed by;

mapping the modulated symbols in the ePDCCH to the at least one distributed control channel element that is mapped to multiple localized physical resource blocks that are distributed in frequency in the subframe.

16. The article of claim 14, further comprising instructions that when executed by a processor enable the system to:

apply mapping to control data operable to form the ePDCCH configured to be communicated from the eNB to the UE in the radio frame, wherein the mapping is formed by;

mapping the at least one localized control channel element and the at least one distributed control channel element to physical resource blocks in the subframe of the radio frame, wherein the subframe includes at least one of the mapped localized control channel element and the at least one mapped distributed control channel element.

17. The article of claim 14, further comprising instructions that when executed by a processor enable the system to:

apply mapping to control data operable to form the ePDCCH configured to be communicated from the eNB to the UE in the radio frame, wherein the mapping is formed by;

mapping the at least one localized control channel element and the at least one distributed control channel element to a physical resource block in the subframe of the radio frame, wherein the at physical resource block includes at least one of the mapped localized control channel elements and at least one of the mapped distributed control channel elements.

18. An apparatus, comprising:

an enhanced Node B (eNB) operable to apply mapping to control data operable to form an enhanced physical downlink control channel (ePDCCH) configured to be communicated to a user equipment (UE) in a radio frame, wherein the apparatus comprises one or more processors and memory configured to;

map modulated symbols in the ePDCCH to at least one of at least one localized control channel element and at least one distributed control channel element, wherein;

the at least one localized control channel element is mapped within multiple distributed physical resource blocks that are contiguous in the frequency domain on a subframe of the radio frame; and

the at least one distributed control channel element is mapped to distributed resource elements in at least one physical resource block in the subframe of the radio frame.

19. The apparatus of claim 18, wherein the apparatus is further configured to:

apply mapping to control data operable to form the ePDCCH configured to be communicated from the eNB to the UE in the radio frame, wherein the mapping is formed by;

mapping the modulated symbols in the ePDCCH to the at least one distributed control channel element that is mapped to multiple localized physical resource blocks that are distributed in frequency in the subframe.

20. The apparatus of claim 18, wherein the apparatus is further configured to:

apply mapping to control data operable to form the ePDCCH configured to be communicated from the eNB to the UE in the radio frame, wherein the mapping is formed by;

mapping the at least one localized control channel element and the at least one distributed control channel element to physical resource blocks in the subframe of the radio frame, wherein the subframe includes at least one of the mapped localized control channel element and the mapped distributed control channel element.

21. The apparatus of claim 18, wherein the apparatus is further configured to:

apply mapping to control data operable to form the ePDCCH configured to be communicated from the eNB to the UE in the radio frame, wherein the mapping is formed by;

mapping the at least one localized control channel element and the at least one distributed control channel element to a physical resource block in the subframe of the radio frame, wherein the physical resource block includes at least one of the mapped localized control channel elements and at least one of the mapped distributed control channel elements.