Method for transmitting control information on transmission points and corresponding transmission point, as well as method for mapping uplink control channel resource of terminal and corresponding terminal

• US 10,396,960 B2
• Filed: 07/30/2013
• Issued: 08/27/2019
• Est. Priority Date: 08/06/2012
• Status: Active Grant

• Current Assignee: KT Corporation
• Original Assignee: KT Corporation
• Inventors: Park, Kyujin
• Primary Examiner(s): Moore, Jr., Michael J
• Application Number:
  US14/419,530
• Publication Number:
  US 20150208391A1
• Time in Patent Office: 2,219 Days
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• 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 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The present disclosure relates to a method and apparatus for transmitting uplink control information for a terminal. That is, the method and apparatus may be provided for transmitting downlink control information through a downlink control channel which is introduced into a data domain and receiving control information. More particularly, a method and apparatus may be provided for mapping an uplink control channel resource for feeding back uplink HARQ ACK/NACK of the terminal for a downlink data channel through downlink scheduling information, which is transmitted via the downlink control channel.

Claims

1. A control information transmission method of a transmission/reception point for transmitting control information with respect to a User Equipment (UE) through a data region of a resource block pair of a subframe, the method comprising:

allocating, to the UE, at least one of downlink control channel sets each formed of X resource block pairs of the subframe, where the at least one of downlink control channel sets includes a Physical Downlink Control Channel (PDCCH) in the data region and the X is a natural number greater than or equal to 1 and less than or equal to a number of resource blocks (RBs) in the entire band;

transmitting, to the UE, uplink control channel resource starting offset indication information separately determined for each of the at least one of downlink control channel sets in the data region; and

transmitting, to the UE, the control information through at least one control channel element indexed for each downlink control channel set,

wherein;

the control information includes downlink scheduling information;

a lowest index of the control channel element through which the control information is transmitted and the uplink control channel resource starting offset indication information are used as components for resource determination when an uplink control channel resource mapping is performed for ACK/NACK with respect to a Physical Downlink Shared Channel (PDSCH) allocated based on the downlink scheduling information;

the downlink scheduling information includes dynamic offset indication information; and

the dynamic offset indication information is used as another component for resource determination when the uplink control channel resource mapping is executed for ACK/NACK with respect to the PDSCH allocated based on the downlink scheduling information;

wherein the X resource block pairs of the subframe are 4, 8, or 16 resource block pairs; and

wherein each of the at least one of downlink control channel sets is configured to be one of a localized downlink control channel set and a distributed downlink control channel set;

when the downlink control channel set is configured to be the localized downlink control channel set, resource element groups forming each control channel element are located in a single physical resource block pair; and

when the downlink control channel set is configured to be the distributed downlink control channel set, resource element groups forming each control channel element are located in two or more physical resource block pairs.

2. The method as claimed in claim 1, wherein:

each of the control channel elements is formed of one of 4 resource element groups and 8 resource element groups where the control channel elements includes control channel elements in the data region; and

the 4 resource element groups and the 8 resource element groups forming each control channel element are located in the single physical resource block pair or in the two or more physical resource block pairs.

3. The method as claimed in claim 1, wherein a transmission antenna port of the downlink scheduling information is used as another component for resource determination when the uplink control channel resource mapping is performed for ACK/NACK with respect to the Physical Downlink Shared Channel (PDSCH) allocated based on the downlink scheduling information.

4. The method as claimed in claim 1, wherein the transmitting the uplink control channel resource starting offset indication information includes transmitting the uplink control channel resource starting offset indication information to the UE through higher layer signaling.

5. An uplink control channel resource mapping method of a User Equipment (UE), the method comprising:

receiving, from a transmission/reception point, uplink control channel resource starting offset indication information separately determined for each of at least one downlink control channel set allocated to the UE, wherein each of the at least one downlink control channel set is formed of X resource block pairs of a subframe, where the downlink control channel includes a Physical Downlink Control Channel (PDCCH) in a data region and X is a natural number greater than or equal to 1 and less than or equal to the number of resource blocks (RBs);

receiving, from a transmission/reception point, control information associated with downlink scheduling information through at least one control channel element indexed for each downlink control channel set, where the control channel element includes a control channel element in the data region; and

executing uplink control channel resource mapping for ACK/NACK with respect to a Physical Downlink Shared Channel (PDSCH) allocated based on the downlink scheduling information, using the uplink control channel resource starting offset indication information and a lowest index of the control channel element as components for resource determination,

wherein;

the downlink scheduling control information includes dynamic offset indication information; and

the uplink control channel resource mapping is performed using the dynamic offset indication information as another component for resource determination;

wherein the X resource block pairs of the subframe are 4, 8, or 16 resource block pairs; and

wherein each of the at least one downlink control channel set is configured to be one of a localized downlink control channel set and a distributed downlink control channel set;

when the downlink control channel set is configured to be the localized downlink control channel set, resource element groups forming each control channel element are located in a single physical resource block pair; and

when the downlink control channel set is configured to be the distributed downlink control channel set, resource element groups forming each control channel element are located in two or more physical resource block pairs.

6. The method as claimed in claim 5, wherein:

each of the control channel elements is formed of one of 4 resource element groups and 8 resource element groups; and

4 or 8 resource element groups forming each control channel element is located in the single physical resource block pair or in the two or more physical resource block pairs.

7. The method as claimed in claim 5, wherein the receiving the uplink control channel resource starting offset indication information includes receiving the uplink control channel resource starting offset indication information through higher layer signaling.

8. The method as claimed in claim 5, wherein the uplink control channel resource mapping is performed using a transmission antenna port of the downlink scheduling control information as another component for resource determination.

9. A User Equipment (UE), comprising:

a receiver configured (i) to receive, from a transmission/reception point, uplink control channel resource starting offset indication information separately determined for each of at least one downlink control channel set allocated to the UE, wherein each of the at least one downlink control channel set is formed of X resource block pairs of a subframe, where the downlink control channel include a Physical Downlink Control Channel (PDCCH) in a data region and X is a natural number greater than or equal to 1 and less than or equal to the number of RBs in the entire band, and (ii) to receive, from a transmission/reception point, control information associated with downlink scheduling information through at least one control channel element indexed for each downlink control channel set, where the control channel element includes a control channel element in the data region; and

a controller configured to perform uplink control channel resource mapping for ACK/NACK with respect to Physical Downlink Shared Channel (PDSCH) allocated based on the downlink scheduling information, using the uplink control channel resource starting offset indication information and a lowest index of the control channel element as components for resource determination,

wherein;

the downlink scheduling control information includes dynamic offset indication information; and

the uplink control channel resource mapping is executed using the dynamic offset indication information as another component for resource determination;

wherein the X resource block pairs of the subframe are 4, 8, or 16 resource block pairs; and

wherein each of the at least one downlink control channel set is configured to be one of a localized downlink control channel set and a distributed downlink control channel set;

when the downlink control channel set is configured to be the localized downlink control channel set, resource element groups forming each control channel element are located in a single physical resource block pair; and

when the downlink control channel set is configured to be the distributed downlink control channel set, resource element groups forming each control channel element are located in two or more physical resource block pairs.

10. The UE as claimed in claim 9, wherein the receiver is configured to receive the uplink control channel resource starting offset indication information through higher layer signaling.

11. The UE as claimed in claim 9, wherein the uplink control channel resource mapping is performed using a transmission antenna port of the downlink scheduling control information as another component for resource determination.