US2022158802A1PendingUtilityA1

Efficient allocation of uplink harq-ack resources for lte enhanced control channel

61
Assignee: TEXAS INSTRUMENTS INCPriority: Nov 2, 2012Filed: Feb 7, 2022Published: May 19, 2022
Est. expiryNov 2, 2032(~6.3 yrs left)· nominal 20-yr term from priority
Inventors:Anthony Edet EkpenyongRunhua Chen
H04L 5/0055H04L 1/1614H04L 1/1854H04L 1/1864
61
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Claims

Abstract

Systems and methods for selecting Physical Uplink Control Channel (PUCCH) resources are disclosed. An Enhanced Physical Downlink Control Channel (EPDCCH) is detected in signals received from a base station in a first subframe. A HARQ-ACK resource indicator offset (ΔARO) value is identified for the EPDCCH. A PUCCH resource is selected for transmission of a Hybrid Automatic Repeat reQuest-ACKnowledgement (HARQ-ACK) corresponding to the EPDCCH. The PUCCH resource is selected based upon the ΔARO value. The ΔARO value may correspond to a semi-statically configured PUCCH resource. A second PUCCH resource may be selected for transmission of the HARQ-ACK on a second antenna port. A HARQ-ACK resource offset field value may be detected in a Downlink Control Information (DCI) format of the EPDCCH. A table that maps the HARQ-ACK resource offset field value for certain DCI formats to ΔARO values may be used to determine the ΔARO value for the EPDCCH.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A method for selecting Physical Uplink Control Channel (PUCCH) resources, comprising:
 detecting an Enhanced Physical Downlink Control Channel (EPDCCH) in signals received from a base station in a first subframe;   identifying a HARQ-ACK resource indicator offset (Δ ARO ) value for the EPDCCH; and   selecting a PUCCH resource for transmission of a Hybrid Automatic Repeat reQuest-ACKnowledgement (HARQ-ACK) corresponding to the EPDCCH, wherein the PUCCH resource is selected based upon the Δ ARO  value.   
     
     
         2 . The method of  claim 1 , further comprising:
 selecting a second PUCCH resource for transmission of the HARQ-ACK on a second antenna port.   
     
     
         3 . The method of  claim 1 , further comprising:
 detecting a HARQ-ACK resource offset field value in a Downlink Control Information (DCI) format of the EPDCCH; and   identifying the Δ ARO  value for the EPDCCH by looking up the HARQ-ACK resource offset field value in a table.   
     
     
         4 . The method of  claim 3 , wherein the table maps the HARQ-ACK resource offset field value for certain DCI formats to Δ ARO  values. 
     
     
         5 . The method of  claim 3 , wherein the HARQ-ACK resource offset field value is a two-bit field in a DCI payload. 
     
     
         6 . The method of  claim 5 , wherein the two-bit field corresponds to Δ ARO  values in the range {0, −1, −2, 2}. 
     
     
         7 . The method of  claim 1 , wherein the Δ ARO  value indicates one out of a set of semi-statically configured PUCCH resources. 
     
     
         8 . The method of  claim 3 , wherein a HARQ-ACK resource offset field in the DCI format of the EPDCCH is used to indicate a small offset or a large offset. 
     
     
         9 . The method of  claim 8 , further comprising:
 a two-bit HARQ-ACK resource offset field (Δ ARO ) is inserted in an EPDCCH set scheduling downlink assignments on the PDSCH; and   the value of the HARQ-ACK resource offset field for PUCCH resource allocation for subframe n−k m  indicate values in the range {0, −1, −N ECCE,q,m-1 −1, N ECCE,q,m-1 −2}.   
     
     
         10 . A user equipment device, comprising:
 a receiver processor circuit configured to:
 detect an Enhanced Physical Downlink Control Channel (EPDCCH) in signals received from a base station in a subframe n; 
   a transmit processor circuit configured to:
 select a Physical Uplink Control Channel (PUCCH) resource for transmission of a Hybrid Automatic Repeat reQuest-ACKnowledgement (HARQ-ACK) to the base station in a subframe n+4, the PUCCH resource selected based upon a HARQ-ACK resource offset; and 
   a modem configured to transmit the PUCCH resource to the base station.   
     
     
         11 . The user equipment device of  claim 10 , wherein the transmit processor circuit is further configured to:
 select a second PUCCH resource for transmission of the HARQ-ACK on a second antenna port.   
     
     
         12 . The user equipment device of  claim 10 , wherein the receiver processor circuit is further configured to:
 detect a HARQ-ACK resource offset field value in a Downlink Control Information (DCI) format of the EPDCCH; and   the transmit processor circuit is further configured to:
 identify the HARQ-ACK resource offset for the EPDCCH by looking up the HARQ-ACK resource offset field value in a table. 
   
     
     
         13 . The user equipment device of  claim 12 , wherein the table maps the HARQ-ACK resource offset field value for certain DCI formats to HARQ-ACK resource offset values. 
     
     
         14 . The user equipment device of  claim 12 , wherein the HARQ-ACK resource offset field value is a two-bit field in a DCI payload. 
     
     
         15 . The user equipment device of  claim 14 , wherein the two-bit field corresponds to HARQ-ACK resource offset values in the range {0, −1, −2, 2}. 
     
     
         16 . The user equipment device of  claim 14 , wherein the two-bit field corresponds to HARQ-ACK resource offset values in the range {0, −1, −N ECCE,q,m-1 −1, N ECCE,q,m-1 −2}. 
     
     
         17 . The user equipment device of  claim 10 , wherein the two-bit HARQ-ACK resource offset value indicates one out of a set of semi-statically configured PUCCH resources. 
     
     
         18 . The user equipment device of  claim 14 , wherein HARQ-ACK feedback information is transmitted on the indicated PUCCH resource.

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