Design on Enhanced Control Channel for Wireless System

• US 20130039291A1
• Filed: 07/10/2012
• Published: 02/14/2013
• Est. Priority Date: 08/12/2011
• Status: Abandoned Application

• Current Assignee: Blackberry Limited
• Original Assignee: Blackberry Limited
• Inventors: Blankenship, Yufei Wu, Gao, Shiwei, Vrzic, Sophie, Xu, Hua, Yu, Dongsheng
• Application Number:
  US13/545,577
• Publication Number:
  US 20130039291A1
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0039 Frequency-contiguous, i.e. with no allocation of frequencies for one user or terminal between the frequencies allocated to another
• CPC Class Codes: H04L 5/0041 Frequency-non-contiguous
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• 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 5/0094 Indication of how sub-channels of the path are allocated
• 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

Abstract

A method is provided for communication in a cell in a wireless telecommunication system. The method comprises, in a region that would otherwise carry a PDSCH, the region being defined by a number of resource blocks and a number of OFDM symbols, instead transmitting at least one of an uplink grant and a downlink assignment in a plurality of OFDM symbols within a first slot, a second slot, or both slots of the region, wherein the region can use either localized or distributed resources, and wherein the region contains one of: a transmission point-specific reference signal; a UE-specific reference signal; and a cell-specific reference signal.

Claims

1. A transmission point in a cell in a wireless telecommunication system, the transmission point comprising:

a transmitter configured such that, in a region that would otherwise carry a physical downlink shared channel (PDSCH), the region being defined by a number of resource blocks and a number of orthogonal frequency division multiplexing (OFDM) symbols, the transmission point instead transmits at least one of an uplink grant and a downlink assignment in a plurality of OFDM symbols within a first slot, a second slot, or both slots of the region, wherein the region can use either localized or distributed resources, and wherein the region contains one of;

a transmission point-specific reference signal;

a UE-specific reference signal; and

a cell-specific reference signal.

2. The transmission point of claim 1, wherein a first resource used to carry a first uplink grant and downlink assignment for a first user equipment (UE) shares a virtual resource block pair with a second resource used to carry a second uplink grant and downlink assignment for a second UE.

3. The transmission point of claim 1, wherein a first resource used to carry a downlink assignment shares a resource block with a second resource used to carry an uplink assignment.

4. The transmission point of claim 1, wherein, when carrier aggregation with cross-carrier scheduling is configured, downlink assignments and uplink grants for different carriers of the same UE are transmitted adjacent to each other.

5. The transmission point of claim 1, wherein the transmission point has a plurality of regions that would otherwise carry a PDSCH and that instead carry at least one of an uplink grant and a downlink assignment, the plurality of regions comprising at least one of:

a transmission point-specific reference signal;

a UE-specific reference signal; and

a cell-specific reference signal.

6. The transmission point of claim 1, wherein a plurality of transmission points jointly transmit physical downlink control channels (PDCCHs) to UEs within the coverage area of the transmission points using a single region that would otherwise carry a PDSCH and that instead carries at least one of an uplink grant and a downlink assignment.

7. A method for communication in a cell in a wireless telecommunication system, the method comprising:

in a region that would otherwise carry a physical downlink shared channel (PDSCH), the region being defined by a number of resource blocks and a number of orthogonal frequency division multiplexing (OFDM) symbols, instead transmitting, by a transmission point in the cell, at least one of an uplink grant and a downlink assignment in a plurality of OFDM symbols within a first slot, a second slot, or both slots of the region, wherein the region can use either localized or distributed resources, and wherein the region contains one of;

a transmission point-specific reference signal;

a UE-specific reference signal; and

a cell-specific reference signal.

8. The method of claim 7, wherein a first resource used to carry a first uplink grant and downlink assignment for a first user equipment (UE) shares a virtual resource block pair with a second resource used to carry a second uplink grant and downlink assignment for a second UE.

9. The method of claim 7, wherein a first resource used to carry a downlink assignment shares a resource block with a second resource used to carry an uplink assignment.

10. The method of claim 7, wherein, when carrier aggregation with cross-carrier scheduling is configured, downlink assignments and uplink grants for different carriers of the same UE are transmitted adjacent to each other.

11. The method of claim 7, wherein a transmission point has a plurality of regions that would otherwise carry a PDSCH and that instead carry at least one of an uplink grant and a downlink assignment, the plurality of regions comprising at least one of:

a transmission point-specific reference signal;

a UE-specific reference signal; and

a cell-specific reference signal.

12. The method of claim 7, wherein a plurality of transmission points jointly transmit physical downlink control channels (PDCCHs) to UEs within the coverage area of the transmission points using a single region that would otherwise carry a PDSCH and that instead carries at least one of an uplink grant and a downlink assignment.

13. A user equipment (UE) comprising:

a receiver configured such that, in a region that would otherwise carry a physical downlink shared channel (PDSCH), the region being defined by a number of resource blocks and a number of orthogonal frequency division multiplexing (OFDM) symbols, the UE instead receives at least one of an uplink grant and a downlink assignment in a plurality of OFDM symbols within a first slot, a second slot, or both slots of the region, wherein the region can use either localized or distributed resources, and wherein the region contains one of;

a transmission point-specific reference signal;

a UE-specific reference signal; and

a cell-specific reference signal.

14. The UE of claim 13, wherein a first resource used to carry a first uplink grant and downlink assignment for a first user equipment (UE) shares a virtual resource block pair with a second resource used to carry a second uplink grant and downlink assignment for a second UE.

15. The UE of claim 13, wherein a first resource used to carry a downlink assignment shares a resource block with a second resource used to carry an uplink assignment.

16. The UE of claim 13, wherein, when carrier aggregation with cross-carrier scheduling is configured, downlink assignments and uplink grants for different carriers are received adjacent to each other.

17. The UE of claim 13, wherein a plurality of regions exist in which a PDSCH would otherwise be received and in which at least one of an uplink grant and a downlink assignment are received instead, the plurality of regions comprising at least one of:

a transmission point-specific reference signal;

a UE-specific reference signal; and

a cell-specific reference signal.

18-74. -74. (canceled)