UPLINK HYBRID ACKNOWLEDGEMENT SIGNALING IN WIRELESS COMMUNICATIONS SYSTEMS

• US 20140003375A1
• Filed: 06/28/2013
• Published: 01/02/2014
• Est. Priority Date: 06/29/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Nam, Young-Han, Han, Jin-Kyu
• Granted Patent: US 9,055,569 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0044 allocation of payload
• 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 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 and a wireless network determining at least part of a PUCCH resource index n_PUCCH⁽¹⁾ (PUCCH format 1a/1b) associated with an ePDCCH PRB set. The PUCCH resource index n_PUCCH⁽¹⁾ is determined depending on whether a localized or distributed ePDCCH is used.

Claims

1. For use in a wireless communications network, a method of a subscriber station communicating with at least one base station, the method comprising:

receiving a DL assignment from the at least one base station;

determining a PUCCH resource index n_PUCCH (PUCCH format 1a/1b), wherein;

when PDCCH comprising a number of CCEs carries the DL assignment, the subscriber station derives the PUCCH resource index n_PUCCH according to the equation;

n_PUCCH=n_CCE+N;

wherein n_CCE is the smallest CCE index of the number of CCEs, N=N_PUCCH⁽¹⁾ is cell-specifically higher-layer configured;

when ePDCCH comprising a number of eCCEs carries the DL assignment;

when the ePDCCH is localized, the subscriber station derives the PUCCH resource index n_PUCCH according to the equation;

n_PUCCH=n_eCCE+N′

+Y+Δ

; and

when the ePDCCH is distributed, the subscriber station derives the PUCCH resource index n_PUCCH according to the equation;

n_PUCCH=n_eCCE+N′

+Y;

wherein n_eCCE is the smallest eCCE index of the number of eCCEs, N′

=N_{PUCCH-UE-ePDCCH}⁽¹⁾ is subscriber station-specifically higher-layer configured, Δ

is a function of RNTI, and Y is determined by a 2-bit field in the DL assignment; and

transmitting HARQ-ACK information for a PDSCH scheduled by the DL assignment to the at least one base station on PUCCH resource n_PUCCH

2. The method as set forth in claim 1 wherein the 2-bit field indicates one value out of 0, −

1, 2 and another integer for Y.

3. The method as set forth in claim 1 wherein Δ

=(RNTI mod

     4).

4. The method as set forth in claim 1 wherein Δ

=(RNTI mod

     2).

5. The method as set forth in claim 1 wherein Δ

=(C-RNTI)mod min{L,N_eCCEsPerPRB}, wherein L is the number of eCCEs for the ePDCCH and N_eCCEsPerPRB is a total number of eCCEs per PRB.

6. For use in a wireless communications network, a method of a base station communicating with at least one subscriber station, the method comprising:

transmitting a DL assignment to one of the at least one subscriber station;

determining a PUCCH resource index n_PUCCH (PUCCH format 1a/1b), wherein;

when PDCCH comprising a number of CCEs carries the DL assignment, the one of the at least one subscriber station derives the PUCCH resource index n_PUCCH according to the equation;

n_PUCCH=n_CCE+N;

wherein n_CCE is the smallest CCE index of the number of CCEs, N=N_PUCCH⁽¹⁾ is cell-specifically higher-layer configured;

when ePDCCH comprising a number of eCCEs carries the DL assignment;

when the ePDCCH is localized, the one of the at least one subscriber station derives the PUCCH resource index n_PUCCH according to the equation;

n_PUCCH=n_eCCE+N′

+Y+Δ

; and

when the ePDCCH is distributed, the one of the at least one subscriber station derives the PUCCH resource index n_PUCCH according to the equation;

n_PUCCH=n_eCCE+N′

+Y;

wherein n_eCCE is the smallest eCCE index of the number of eCCEs, N′

=N_{PUCCH-UE-ePDCCH}⁽¹⁾ is subscriber station-specifically higher-layer configured, Δ

is a function of RNTI, and Y is determined by a 2-bit field in the DL assignment; and

receiving HARQ-ACK information for a PDSCH scheduled by the DL assignment from the one of the at least subscriber station on PUCCH resource n_PUCCH.

7. The method as set forth in claim 6 wherein the 2-bit field indicates one value out of 0, −

1, 2 and another integer for Y.

8. The method as set forth in claim 6 wherein Δ

=(RNTI mod

     4).

9. The method as set forth in claim 6 wherein Δ

=(RNTI mod

     2).

10. The method as set forth in claim 6 wherein Δ

=(C-RNTI)mod min{L,N_eCCEsPerPRB}, wherein L is the number of eCCEs for the ePDCCH and N_eCCEsPerPRB is a total number of eCCEs per PRB.

11. For use in a wireless communications network, a subscriber station configured to communicate with at least one base station, configured to:

receive a DL assignment from the at least one base station;

determine at least part of a PUCCH resource index n_PUCCH⁽¹⁾ (PUCCH format 1a/1b) associated with an ePDCCH PRB set, wherein;

when PDCCH comprising a number of CCEs carries a DL assignment, the subscriber station is configured to derive the PUCCH resource index n_PUCCH according to the equation;

n_PUCCH=n_CCE+N;

wherein n_CCE is the smallest CCE index of the number of CCEs, N=N_PUCCH⁽¹⁾ is cell-specifically higher-layer configured;

when ePDCCH comprising a number of eCCEs carries the DL assignment;

when the ePDCCH is localized, the subscriber station is configured to derive the PUCCH resource index n_PUCCH according to the equation;

n_PUCCH=n_eCCE+N′

+Y+Δ

; and

when the ePDCCH is distributed, the subscriber station is configured to derive the PUCCH resource index n_PUCCH according to the equation;

n_PUCCH=n_eCCE+N′

+Y;

wherein n_eCCE is the smallest eCCE index of the number of eCCEs, N′

=N_{PUCCH-UE-ePDCCH}⁽¹⁾ is subscriber station-specifically higher-layer configured, Δ

is a function of RNTI, and Y is determined by a 2-bit field in the DL assignment; and

transmit HARQ-ACK information for a PDSCH scheduled by the DL assignment to the at least one base station on PUCCH resource n_PUCCH.

12. The subscriber station as set forth in claim 11 wherein the 2-bit field indicates one value out of 0, −

1, 2 and another integer for Y.

13. The subscriber station as set forth in claim 11 wherein Δ

=(RNTI mod

     4).

14. The subscriber station as set forth in claim 11 wherein Δ

=(RNTI mod

     2).

15. The subscriber station as set forth in claim 11 wherein Δ

=(C-RNTI) mod min{L,N_eCCEsPerPRB}, wherein L is the number of eCCEs for the ePDCCH and N_eCCEsPerPRB is a total number of eCCEs per PRB.

16. For use in a wireless communications network, a base station configured to communicate with at least one subscriber station and configured to:

transmit a DL assignment to one of the at least one subscriber station;

determine at least part of a PUCCH resource index n_PUCCH⁽¹⁾ (PUCCH format 1a/1b) associated with an ePDCCH PRB set, wherein;

when PDCCH comprising a number of CCEs carries a DL assignment, the one of the at least one subscriber station derives the PUCCH resource index n_PUCCH according to the equation;

n_PUCCH=n_CCE+N;

wherein n_CCE is the smallest CCE index of the number of CCEs, N=N_PUCCH⁽¹⁾ is cell-specifically higher-layer configured;

when ePDCCH comprising a number of eCCEs carries the DL assignment;

when the ePDCCH is localized, the one of the at least one subscriber station is configured to derive the PUCCH resource index n_PUCCH according to the equation;

n_PUCCH=n_eCCE+N′

Y+Δ

; and

when the ePDCCH is distributed, the one of the at least one subscriber station is configured to derive the PUCCH resource index n_PUCCH according to the equation;

n_PUCCH=n_eCCE+N′

+Y;

wherein n_eCCE is the smallest eCCE index of the number of eCCEs, N′

=N_{PUCCH-UE-ePDCCH}⁽¹⁾ is subscriber station-specifically higher-layer configured, Δ

is a function of RNTI, and Y is determined by a 2-bit field in the DL assignment; and

receive HARQ-ACK information for a PDSCH scheduled by the DL assignment from the one of the at least subscriber station on PUCCH resource n_PUCCH;

17. The base station as set forth in claim 16 wherein the 2-bit field indicates one value out of 0, −

1, 2 and another integer for Y.

18. The base station as set forth in claim 16 wherein Δ

=(RNTI mod

     4).

19. The base station as set forth in claim 16 wherein Δ

=(RNTI mod

     2).

20. The base station as set forth in claim 16 wherein Δ

=(C-RNTI) mod min{L,N_eCCEsPerPRB}, wherein L is the number of eCCEs for the ePDCCH and N_eCCEsPerPRB is a total number of eCCEs per PRB.