TRANSMISSIONS/RECEPTIONS OF UPLINK ACKNOWLEDGEMENT SIGNALS IN WIRELESS NETWORKS

• US 20140161060A1
• Filed: 12/06/2013
• Published: 06/12/2014
• Est. Priority Date: 12/11/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Nam, Young-Han, Ng, Boon Loong, Papasakellariou, Aris
• Granted Patent: US 9,276,726 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/1692 Physical properties of the supervisory signal, e.g. acknowledgement by energy bursts
• 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 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04W 52/08 Closed loop power control
• CPC Class Codes: H04W 52/10 Open loop power control
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/242 taking into account path loss
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 52/40 during macro-diversity or soft handoff

Abstract

An apparatus for use in a wireless communication network includes a UE configured to communicate with a plurality of serving cells with at least a first serving cell and a second serving cell. The UE is configured to operate in at least two carrier frequencies. The UE includes processing circuitry. The processing circuitry is configured to detect one or more scheduling assignments for receiving one or more respective PDSCHs from a respective one or more of the plurality of serving cells. The processing circuitry is also configured to receive the one or more PDSCHs from the respective one or more of the plurality of serving cells based on the one or more scheduling assignments. The processing circuitry is further configured to transmit HARQ-ACK information on a PUCCH in response to receiving the one or more PDSCHs. The processing circuitry is configured to utilize first and second power control loops.

Claims

1. For use in a wireless communication network, an apparatus comprising:

a user equipment (UE) configured to communicate with a plurality of serving cells with at least a first serving cell and a second serving cell, the UE configured to operate in at least two carrier frequencies;

the UE comprising processing circuitry configured to;

detect one or more scheduling assignments for receiving one or more respective physical downlink shared channels (PDSCHs) from a respective one or more of the plurality of serving cells;

receive the one or more PDSCHs from the respective one or more of the plurality of serving cells based on the one or more scheduling assignments; and

transmit hybrid automatic repeat request acknowledgment (HARQ-ACK) information on a physical uplink control channel (PUCCH) in response to receiving the one or more PDSCHs;

wherein the processing circuitry is configured to utilize a first power control loop to determine an uplink transmission power for the PUCCH when the UE receives PDSCH only from the first serving cell, the first power control loop configured to use a path-loss reference derived from a received power of a reference signal transmitted in the first serving cell, a transmission power control (TPC) command of a TPC field included in a scheduling assignment for the PDSCH reception in the first serving cell, and a first set of open loop power control parameters; and

wherein the processing circuitry is configured to utilize a second power control loop to determine an uplink transmission power for the PUCCH when the UE receives PDSCH at least from the second serving cell, the second power control loop configured to use a path-loss reference derived from a received power of a reference signal transmitted in the second serving cell, a TPC command of a TPC field included in a scheduling assignment for the PDSCH reception in the second serving cell, and a second set of open loop power control parameters.

2. The apparatus of claim 1, wherein:

the processing circuitry is further configured to receive a configuration of a PUCCH format 3 resource configured by a radio resource control (RRC);

the PUCCH resource is a PUCCH format 1a/1b resource determined by n_PUCCH^{(1,{tilde over (p)}0)}=n_CCE+N_PUCCH⁽¹⁾ when the UE detects a scheduling assignment for receiving PDSCH only from the first serving cell, wherein the scheduling assignment is conveyed by a physical downlink control channel (PDCCH) that is transmitted in a plurality of control channel elements (CCEs), n_CCE is an index number of the smallest CCE and N_PUCCH⁽¹⁾ is configured by higher layers; and

the PUCCH resource is the PUCCH format 3 resource when the UE detects a scheduling assignment for receiving PDSCH at least from the second serving cell.

3. The apparatus of claim 2, wherein the processing circuitry is further configured to:

receive a configuration of a first virtual cell identification (VCID) and a second VCID by a radio resource control (RRC); and

assign the first VCID to PUCCH format 1a/1b and the second VCID to PUCCH format 3.

4. The apparatus of claim 2, wherein the processing circuitry is further configured to:

receive a configuration of a virtual cell identification (VCID) by a radio resource control (RRC); and

assign a physical cell identification (ID) to PUCCH format 1a/1b and the VCID to PUCCH format 3.

5. The apparatus of claim 1, wherein the first serving cell is a primary serving cell and the second serving cell is a secondary serving cell.

6. The apparatus of claim 1, wherein the first serving cell is a secondary serving cell and the second serving cell is a primary serving cell.

7. A method for managing a hybrid automatic repeat request acknowledgment in a wireless network, the method comprising:

operating a user equipment (UE) in at least two carrier frequencies;

detecting one or more scheduling assignments for receiving one or more respective physical downlink shared channels (PDSCHs) from a respective one or more of the plurality of serving cells;

receiving the one or more PDSCHs from the respective one or more of the plurality of serving cells based on the one or more scheduling assignments;

transmitting hybrid automatic repeat request acknowledgment (HARQ-ACK) information on a physical uplink control channel (PUCCH) in response to receiving the one or more PDSCHs;

utilizing a first power control loop to determine an uplink transmission power for the PUCCH when the UE receives PDSCH only from the first serving cell, the first power control loop using a path-loss reference derived from a received power of a reference signal transmitted in the first serving cell, a transmission power control (TPC) command of a TPC field included in a scheduling assignment for the PDSCH reception in the first serving cell, and a first set of open loop power control parameters; and

utilizing a second power control loop to determine an uplink transmission power for the PUCCH when the UE receives PDSCH at least from the second serving cell, the second power control loop using a path-loss reference derived from a received power of a reference signal transmitted in the second serving cell, a TPC command of a TPC field included in a scheduling assignment for the PDSCH reception in the second serving cell, and a second set of open loop power control parameters.

8. The method of claim 7, further comprising:

receiving a configuration of a PUCCH format 3 resource configured by a radio resource control (RRC);

wherein the PUCCH resource is a PUCCH format 1a/1b resource determined by n_PUCCH^{(1,{tilde over (p)}0)}=n_CCE+N_PUCCH⁽¹⁾ when the UE detects a scheduling assignment for receiving PDSCH only from the first serving cell, wherein the scheduling assignment is conveyed by a physical downlink control channel (PDCCH) that is transmitted in a plurality of control channel elements (CCEs), n_CCE is an index number of the smallest CCE and N_PUCCH⁽¹⁾ is configured by higher layers; and

wherein the PUCCH resource is the PUCCH format 3 resource when the UE detects a scheduling assignment for receiving PDSCH at least from the second serving cell.

9. The method of claim 8, further comprising:

receiving a configuration of a first virtual cell identification (VCID) and a second VCID by a radio resource control (RRC); and

assigning the first VCID to PUCCH format 1a/1b and the second VCID to PUCCH format 3.

10. The method of claim 8, further comprising:

receiving a configuration of a virtual cell identification (VCID) by a radio resource control (RRC); and

assigning a physical cell identification (ID) to PUCCH format 1a/1b and the VCID to PUCCH format 3.

11. The method of claim 7, wherein the first serving cell is a primary serving cell and the second serving cell is a secondary serving cell.

12. The method of claim 7, wherein the first serving cell is a secondary serving cell and the second serving cell is a primary serving cell.

13. The method of claim 7, further comprising:

sending by the first serving cell a message to the second serving cell, the message comprising UE-specific information;

wherein the UE-specific information comprises at least one of;

a number of transport blocks in a first serving cell transmission mode, a first serving cell transmission mode, and a number of HARQ-ACK bits reserved for the first serving cell; and

wherein the UE-specific message comprises periodic channel state information transmission parameters to the first serving cell and schedule request reporting subframes to the first serving cell.

14. The method of claim 7, further comprising:

sending by the second serving cell a message to the first serving cell, the message comprising UE-specific information for PUCCH format 3 transmission.

15. The method of claim 14, wherein the UE-specific information comprises at least one of:

a respective scrambling sequence and a resource index n_PUCCH^(3,p) configured by the second serving cell.

16. A non-transitory computer readable medium embodying computer readable program code for performing a method that comprises:

operating a user equipment (UE) in at least two carrier frequencies;

detecting one or more scheduling assignments for receiving one or more respective physical downlink shared channels (PDSCHs) from a respective one or more of the plurality of serving cells;

receiving the one or more PDSCHs from the respective one or more of the plurality of serving cells based on the one or more scheduling assignments;

transmitting hybrid automatic repeat request acknowledgment (HARQ-ACK) information on a physical uplink control channel (PUCCH) in response to receiving the one or more PDSCHs;

utilizing a first power control loop to determine an uplink transmission power for the PUCCH when the UE receives PDSCH only from the first serving cell, the first power control loop using a path-loss reference derived from a received power of a reference signal transmitted in the first serving cell, a transmission power control (TPC) command of a TPC field included in a scheduling assignment for the PDSCH reception in the first serving cell, and a first set of open loop power control parameters; and

utilizing a second power control loop to determine an uplink transmission power for the PUCCH when the UE receives PDSCH at least from the second serving cell, the second power control loop using a path-loss reference derived from a received power of a reference signal transmitted in the second serving cell, a TPC command of a TPC field included in a scheduling assignment for the PDSCH reception in the second serving cell, and a second set of open loop power control parameters.

17. For use in a wireless communication network, an apparatus comprising:

an eNodeB configured to communicate with a user equipment (UE) on at least one of two or more carrier frequencies, the eNodeB comprising a plurality of serving cells comprising at least a first serving and a second serving cell;

the eNodeB comprising processing circuitry configured to;

transmit one or more scheduling assignments for one or more respective physical downlink shared channels (PDSCHs) to the UE

transmit the one or more PDSCHs to the UE based on the one or more scheduling assignments; and

receive hybrid automatic repeat request acknowledgment (HARQ-ACK) information on a physical uplink control channel (PUCCH) in response to the UE receiving the one or more PDSCHs;

wherein the UE is configured to utilize a first power control loop to determine an uplink transmission power for the PUCCH when the UE receives PDSCH only from the first serving cell, the first power control loop configured to use a path-loss reference derived from a received power of a reference signal transmitted in the first serving cell, a transmission power control (TPC) command of a TPC field included in a scheduling assignment for the PDSCH reception in the first serving cell, and a first set of open loop power control parameters; and

wherein the UE is configured to utilize a second power control loop to determine an uplink transmission power for the PUCCH when the UE receives PDSCH at least from a second serving cell, the second power control loop configured to use a path-loss reference derived from a received power of a reference signal transmitted in the second serving cell, a TPC command of a TPC field included in a scheduling assignment for the PDSCH reception in the second serving cell, and a second set of open loop power control parameters.

18. The apparatus of claim 17, wherein:

the processing circuitry is further configured to transmit a configuration of a PUCCH format 3 resource configured by a radio resource control (RRC);

the PUCCH resource is a PUCCH format 1a/1b resource determined by n_PUCCH^{(1,{tilde over (p)}0)}=n_CCE+N_PUCCH⁽¹⁾ when the UE detects a scheduling assignment for receiving PDSCH only from the first serving cell, wherein the scheduling assignment is conveyed by a physical downlink control channel (PDCCH) that is transmitted in a plurality of control channel elements (CCEs), n_CCE is an index number of the smallest CCE and N_PUCCH⁽¹⁾ is configured by higher layers; and

the PUCCH resource is the PUCCH format 3 resource when the UE detects a scheduling assignment for receiving PDSCH at least from the second serving cell.

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

transmit a configuration of a first virtual cell identification (VCID) and a second VCID by a radio resource control (RRC),

wherein the UE is configured to assign the first VCID to PUCCH format 1a/1b and the second VCID to PUCCH format 3.

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

transmit a configuration of a virtual cell identification (VCID) by a radio resource control (RRC),

wherein the UE is configured to assign a physical cell identification (ID) to PUCCH format 1a/1b and the VCID to PUCCH format 3.