METHOD AND APPARATUS FOR ASSIGNING RESPONSE CHANNEL RESOURCES

• US 20120207107A1
• Filed: 02/13/2012
• Published: 08/16/2012
• Est. Priority Date: 02/12/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: LI, Yingyang, SUN, Chengjun, LI, Xiaoqiang
• Granted Patent: US 8,594,037 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• 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 52/34 TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
• CPC Class Codes: H04W 52/58 Format of the TPC bits
• CPC Class Codes: H04W 72/04 Wireless resource allocation

Abstract

An apparatus and method for assigning an acknowledgement (ACK)/a negative acknowledgement (NACK) channel resources. The method includes setting a User Equipment (UE) to feed back Acknowledgement (ACK)/Negative Acknowledgement (NACK) information in a Carrier Aggregation (CA) mode; setting a Transmit Power Control (TPC) field of a Physical Downlink Controlling Channel (PDCCH) message to transmit an ACK/NACK Resource Indicator (ARI) information, when a Downlink Assigning Indicator (DAI) value of the PDCCH message of a Secondary cell (Scell) scheduled in a non cross-carrier manner is 1; setting the TPC field to transmit a TPC command for the ACK/NACK feedback information, when the DAI value is greater than 1; and transmitting the PDCCH message and downlink data to the UE.

Claims

1. A method of allocating response channel resources by a Node B in a wireless communication system, the method comprising:

setting a User Equipment (UE) to feed back Acknowledgement (ACK)/Negative Acknowledgement (NACK) information in a Carrier Aggregation (CA) mode;

setting a Transmit Power Control (TPC) field of a Physical Downlink Controlling Channel (PDCCH) message to transmit an ACK/NACK Resource Indicator (ARI) information, when a Downlink Assigning Indicator (DAI) value of the PDCCH message of a Secondary cell (Scell) scheduled in a non cross-carrier manner is 1;

setting the TPC field to transmit a TPC command for the ACK/NACK feedback information, when the DAI value is greater than 1; and

transmitting the PDCCH message and downlink data to the UE.

2. The method of claim 1, further comprising:

setting a TPC field of a PDCCH message scheduling a Primary cell (Pcell) to transmit a TPC command; and

transmitting the PDCCH message.

3. The method of claim 1, further comprising:

setting a TPC field of a PDCCH message of a Scell scheduled in a cross-carrier manner to transmit a TPC command; and

transmitting the PDCCH message.

4. The method of claim 1, wherein, when a size of a bundling window is greater than 4, ARI information transmitted in TPC fields of a plurality of PDCCH messages for scheduling the Scell with their DAI values of 1 are equal.

5. A method of transmitting Acknowledgement (ACK)/Negative Acknowledgement (NACK) information using response channel resources by a User Equipment (UE) in a wireless communication system, the method comprising:

receiving a Physical Downlink Controlling Channel (PDCCH) message and downlink data from a Node B;

generating ACK/NACK feedback information for the downlink data;

determining an ACK/NACK channel corresponding to a Secondary cell (Scell) based on the PDCCH message scheduling the Scell with a DAI value of 1, and determining a transmitting power of the ACK/NACK feedback information based on the PDCCH message scheduling the Scell with a DAI value of greater than 1, when the Scell is scheduled in a non cross-carrier manner; and

transmitting the ACK/NACK feedback information with the determined transmitting power using the determined ACK/NACK channel.

6. A Node B for allocating response channel resources in a wireless communication system, the Node B comprising:

a setting unit for setting a User Equipment (UE) to feed back Acknowledgement (ACK)/Negative Acknowledgement (NACK) information in a Carrier Aggregation (CA) mode, setting a Transmit Power Control (TPC) field of a Physical Downlink Controlling Channel (PDCCH) message to transmit an ACK/NACK Resource Indicator (ARI) information, when a Downlink Assigning Indicator (DAI) value of the PDCCH message of a Secondary cell (Scell) scheduled in a non cross-carrier manner is 1, and setting the TPC field to transmit a TPC command for the ACK/NACK feedback information, when the DAI value is greater than 1; and

a transmitter for transmitting the PDCCH message and downlink data to the UE.

7. The Node B of claim 6, wherein the setting unit sets a TPC field of a PDCCH message scheduling a Primary cell (Pcell) to transmit a TPC command.

8. The Node B of claim 6, wherein the setting unit sets a TPC field of a PDCCH message of a Scell scheduled in a cross-carrier manner to transmit a TPC command.

9. The Node B of claim 6, wherein, when a size of a bundling window is greater than 4, ARI information transmitted in TPC fields of a plurality of PDCCH messages for scheduling the Scell with their DAI values of 1 being the same.

10. A User Equipment (UE) for transmitting Acknowledgement (ACK)/Negative Acknowledgement (NACK) information using response channel resources in a wireless communication system, the UE comprising:

a receiver for receiving a Physical Downlink Controlling Channel (PDCCH) message and downlink data from a Node B;

a generator for generating ACK/NACK feedback information for the downlink data, and determining an ACK/NACK channel corresponding to a Secondary cell (Scell) based on the PDCCH message scheduling the Scell with a DAI value of 1, and determining a transmitting power of the ACK/NACK feedback information based on the PDCCH message scheduling the Scell with a DAI value of greater than 1, when the Scell is scheduled in a non cross-carrier manner; and

a transmitter for transmitting the ACK/NACK feedback information with the determined transmitting power using the determined ACK/NACK channel.