Physical uplink control channel (PUCCH) resource allocation (RA) for a hybrid automatic retransmission re-quest-acknowledge (HARQ-ACK) transmission

• US 9,608,910 B2
• Filed: 10/29/2015
• Issued: 03/28/2017
• Est. Priority Date: 10/26/2012
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel Corporation
• Inventors: Han, Seunghee, Zhu, Yuan, Fwu, Jong-Kae, Chen, Xiaogang
• Primary Examiner(s): Zaidi, Iqbal
• Application Number:
  US14/927,099
• Publication Number:
  US 20160066302A1
• Time in Patent Office: 516 Days
• Field of Search: 370280-339
• US Class Current: 1/1
• CPC Class Codes: H04J 3/1694 Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers Passive Optical Networks H04Q11/0062
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 12/1407 Policy-and-charging control [PCC] architecture
• CPC Class Codes: H04L 47/12 Avoiding congestion; Recovering from congestion
• CPC Class Codes: H04L 47/38 by adapting coding or compression rate
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 28/0289 Congestion control load shedding arrangements in network planning H04W16/08; performing reselection for handling the traffic H04W36/22; wireless traffic scheduling H04W72/12
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A user equipment (UE) is disclosed. The UE can identify a downlink control channel. The UE can determine when the downlink control channel is an enhanced physical downlink control channel (EPDCCH). The UE can select an enhanced physical uplink control channel (PUCCH) resource allocation for a hybrid automatic retransmission re-quest-acknowledge (HARQ-ACK) transmission when the downlink control channel is the EPDCCH.

Claims

1. An apparatus of a user equipment (UE), comprising one or more processors and memory configured to:

identify, at the UE, a downlink control channel;

determine when the downlink control channel is an enhanced physical downlink control channel (EPDCCH); and

select an enhanced physical uplink control channel (PUCCH) resource allocation for a hybrid automatic retransmission re-quest-acknowledge (HARQ-ACK) transmission when the downlink control channel is the EPDCCH,

wherein the downlink control channel is identified within a prior specified subframe that is received in time before a subframe n, wherein the prior specified subframe includes a subframe n−

k, where kε

K, where a downlink association set index K is defined in a Table 10.1.3.1-1 in a Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) standard Release 11 Technical Specification (TS) 36.213, and K includes a set of M elements {k₀, k₁, . . . k_M-1} depending on a subframe n and an uplink/downlink (UL/DL) configuration.

2. The apparatus of claim 1, further configured to:

determine when the downlink control channel is a physical downlink control channel (PDCCH); and

select a legacy PUCCH resource allocation for the HARQ-ACK transmission when the downlink control channel is the PDCCH.

3. The apparatus of claim 1, further configured to determine the PUCCH resource for the subframe n−

k using an integer m, where a k_m is the smallest value in a set K such that the UE detects an EPDCCH in a subframe n−

k_m.

4. The apparatus of claim 3, wherein for one configured serving cell and the subframe n, with M=1 where M is a number of elements in the set Kε

{k₀, k₁, . . . k_M-1};

the apparatus is further configured to determine the enhanced PUCCH resource n_PUCCH^{(1,{tilde over (p)})} for the HARQ-ACK transmission using a lowest ECCE index n_ECCE of the EPDCCH uses the enhanced PUCCH resource n_PUCCH^{(1,{tilde over (p)})} represented by n_PUCCH^{(1,{tilde over (p)}0)}=n_ECCE+Value for antenna port p₀ and n_PUCCH^{(1,{tilde over (p)}1)}=n_ECCE+Value+1 for antenna port p₁, where Value is the parameter, n_ECCE is the number of the first ECCE used for transmission of the corresponding EPDCCH for the EPDCCH set {tilde over (k)} in subframe n−

k_m and a corresponding m, where k_m is the smallest value in set K such that UE detects an EPDCCH for the EPDCCH set {tilde over (k)} in subframe n−

k_m, and antenna port p₁ is used when two antenna port transmission is configured;

or

the apparatus is further configured to determine the legacy PUCCH resource n_PUCCH^{(1,{tilde over (p)})} for a HARQ-ACK transmission using a lowest CCE index n_CCE of the PDCCH selects a c value out of {0, 1, 2, 3} which makes N_c≦

n_CCE<

N_c+1 and uses the legacy PUCCH resource n_PUCCH^{(1,{tilde over (p)})} represented by n_PUCCH^{(1,{tilde over (p)}0)}=(M−

m−

1)·

N_c+m·

N_c+1+n_CCE+N_PUCCH⁽¹⁾ for antenna port p₀ and n_PUCCH^{(1,{tilde over (p)}1)}=(M−

m−

1)·

N_c+m·

N_c+1+n_CCE+1+N_PUCCH⁽¹⁾ for antenna port p₁, where n_CCE is a first CCE index number used for transmission of a corresponding PDCCH in subframe n−

k_m and the corresponding m, where k_m is the smallest value in set K such that UE detects a PDCCH in subframe n−

k_m, N_c=max{0,└

[N_RB^DL·

(N_sc^RB·

c−

4)]/36┘

}, N_RB^DL is a downlink bandwidth configuration from the primary cell, expressed in units of N_sc^RB, N_sc^RB is a resource block size in the frequency domain, expressed as a number of subcarriers, and N_PUCCH⁽¹⁾ is a starting PUCCH channel index for a PUCCH region in an uplink subframe and is configured by high layers for each UE, and antenna port p₁ is used when two antenna port transmission is configured.

5. The apparatus of claim 3, wherein for one configured serving cell and a subframe n with M>

1 where M is the number of elements in the set Kε

{k₀, k₁, . . . k_M-1} and 0≦

i≦

M−

1;

the apparatus is further configured to determine the enhanced PUCCH resource n_PUCCH,i⁽¹⁾ for the HARQ-ACK transmission using a lowest ECCE index n_ECCE,i is represented by n_PUCCH,i⁽¹⁾=n_ECCE,i+Value, where Value is the parameter, n_ECCE,i is the number of the first ECCE used for transmission of the corresponding EPDCCH for the EPDCCH set {tilde over (k)} in subframe n−

k_i;

or

the apparatus is further configured to determine the legacy PUCCH resource n_PUCCH,i⁽¹⁾ for a HARQ-ACK transmission using the lowest CCE index n_CCE,i is represented by n_PUCCH,i⁽¹⁾=(M−

i−

1)·

N_c+i·

N_c+1+n_CCE,i+N_PUCCH⁽¹⁾, where c is selected from {0, 1, 2, 3} such that N_c≦

n_CCE,i<

N_c+1, n_CCE,i is a first CCE index number used for transmission of a corresponding PDCCH in subframe n−

k_i, N_c=max{0,└

[N_RB^DL·

(N_sc^RB·

c−

4)]/36┘

}, N_RB^DL is a downlink bandwidth configuration, expressed in units of N_sc^RB, N_sc^RB is a resource block size in the frequency domain, expressed as a number of subcarriers, and N_PUCCH⁽¹⁾ is a starting PUCCH channel index for a PUCCH region in an uplink subframe and is configured by high layers for each UE.

6. The apparatus of claim 3, wherein for at least two configured serving cells and a subframe n with M≦

2 where M is the number of elements in the set Kε

{k₀, k₁, . . . k_M-1}, k_mε

K on a primary cell, and 0≦

j≦

A−

1 and Aε

{2,3,4};

the apparatus is further configured to determine the enhanced PUCCH resource n_PUCCH,j⁽¹⁾ for the HARQ-ACK transmission using the lowest ECCE index n_ECCE,m is represented by n_PUCCH,j⁽¹⁾=n_ECCE,m+Value and n_PUCCH,j+1⁽¹⁾=n_ECCE,m+Value+1, where Value is the parameter, n_ECCE,m is the number of the first ECCE used for transmission of the corresponding DCI assignment by EPDCCH for the EPDCCH set {tilde over (k)} in subframe n−

k_m, and n_PUCCH,j+1⁽¹⁾ is used for a subframe n and a transmission mode that support up to two transport block on a serving cell where a corresponding PDSCH transmission occurs;

or

the apparatus is further configured to determine the legacy PUCCH resource n_PUCCH,j⁽¹⁾ for the HARQ-ACK transmission using the lowest ECCE index n_CCE,m is represented by n_PUCCH,j⁽¹⁾=(M−

m−

1)·

N_c+m·

N_c+1+n_CCE,m+N_PUCCH⁽¹⁾ and n_PUCCH,j+1⁽¹⁾=(M−

m−

1)·

N_c+m·

N_c+1+n_CCE,m+N_PUCCH⁽¹⁾, where c is selected from {0, 1, 2, 3} such that N_c≦

n_CCE,m<

N_c+1, n_CCE,m is a first CCE index number used for transmission of a corresponding PDCCH in subframe n−

k_m, N_c=max{0,└

[N_RB^DL·

(N_sc^RB·

c−

4)]/36┘

}, N_RB^DL is a downlink bandwidth configuration from the primary cell, expressed in units of N_sc^RB, N_sc^RB is a resource block size in the frequency domain, expressed as a number of subcarriers, and N_PUCCH⁽¹⁾ is a starting PUCCH channel index for a PUCCH region in an uplink subframe and is configured by high layers for each UE, and n_PUCCH,j+1⁽¹⁾ is used for a subframe n and a transmission mode that support up to two transport block on a serving cell where a corresponding physical downlink shared channel (PDSCH) transmission occurs.

7. The apparatus of claim 3, wherein for at least two configured serving cells and a subframe n with M>

² where M is the number of elements in the set Kε

{k₀, k₁, . . . k_M-1}, kε

K, k_mε

K for a primary cell;

the apparatus is further configured to determine the enhanced PUCCH resource n_PUCCH,1⁽¹⁾ for the HARQ-ACK transmission using the lowest ECCE index n_ECCE,m is represented by n_PUCCH,1⁽¹⁾=n_ECCE,m+Value, where Value is the parameter, n_ECCE,m is the number of the first ECCE used for transmission of the corresponding EPDCCH for the EPDCCH set {tilde over (k)} in subframe n−

k_m;

or

the apparatus is further configured to determine the legacy PUCCH resource n_PUCCH,1⁽¹⁾ for the HARQ-ACK transmission using the lowest CCE index n_CCE,m is represented by n_PUCCH,1⁽¹⁾=(M−

m−

1)·

N_c+m·

N_c+1+n_CCE,m+N_PUCCH⁽¹⁾, where c is selected from {0, 1, 2, 3} such that N_c≦

n_CCE,m<

N_c+1, n_CCE,m is a first CCE index number used for transmission of a corresponding PDCCH in subframe n−

k_m, N_c=max{0,└

[N_RB^DL·

(N_sc^RB·

c−

4)]/36┘

}, N_RB^DL is a downlink bandwidth configuration from the primary cell, expressed in units of N_sc^RB, N_sc^RB is a resource block size in the frequency domain, expressed as a number of subcarriers, and N_PUCCH⁽¹⁾ is a starting PUCCH channel index for a PUCCH region in an uplink subframe and is configured by high layers for each UE.

8. The apparatus of claim 1, wherein the UE includes an antenna, a display screen, a speaker, a microphone, a graphics processor, an application processor, an internal memory, or a non-volatile memory port.

9. At least one non-transitory computer readable storage medium having instructions embodied thereon, the instructions when executed perform the following:

identifying, using at least one processor at a user equipment (UE), a downlink control channel;

determining, using the at least one processor at the UE, when the downlink control channel is an enhanced physical downlink control channel (EPDCCH); and

selecting, using the at least one processor at the UE, an enhanced physical uplink control channel (PUCCH) resource allocation for a hybrid automatic retransmission re-quest-acknowledge (HARQ-ACK) transmission when the downlink control channel is the EPDCCH,

wherein the downlink control channel is identified within a prior specified subframe that is received in time before a subframe n, wherein the prior specified subframe includes a subframe n−

k, where kε

K, where a downlink association set index K is defined in a Table 10.1.3.1-1 in a Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) standard Release 11 Technical Specification (TS) 36.213, and K includes a set of M elements {k₀, k₁, . . . k_M-1} depending on the subframe n and a uplink/downlink (UL/DL) configuration.

10. The at least one non-transitory computer readable storage medium of claim 9, further comprising instructions when executed perform the following:

determining when the downlink control channel is a physical downlink control channel (PDCCH); and

selecting a legacy PUCCH resource allocation for the HARQ-ACK transmission when the downlink control channel is the PDCCH.

11. The at least one non-transitory computer readable storage medium of claim 9, further comprising instructions when executed perform the following:

determining the enhanced PUCCH resource using a parameter Value represent by Value=ARO+AP+(m+1)·

N_PUCCH^(1,k) where acknowledgement (ACK)/negative ACK (ACK/NACK) Resource Offset (ARO) is an integer offset value derived from a downlink control information (DCI) in the EPDCCH, an antenna port (AP) is parameter (0, . . . ,

     3), a N_PUCCH^(1,k) is a UE specific starting offset value for an EPDCCH set {tilde over (k)}, and m is an integer, where k_m is the smallest value in a set K such that the UE detects an EPDCCH for an EPDCCH set {tilde over (k)} in a subframe n−

k_m.

12. The at least one non-transitory computer readable storage medium of claim 9, wherein for one configured serving cell and the subframe n with M=1:

further comprising instructions when executed perform the following;

determining the legacy PUCCH resource n_PUCCH^{(1,{tilde over (p)})} for a HARQ-ACK transmission using the lowest CCE index n_CCE of the PDCCH can select a c value out of {0, 1, 2, 3} which makes N_c≦

n_CCE<

N_c+1 and using the legacy PUCCH resource n_PUCCH^{(1,{tilde over (p)})} represented by n_PUCCH^{(1,{tilde over (p)}0)}=(M−

m−

1)·

N_c+m·

N_c+1+n_CCE+N_PUCCH⁽¹⁾ for antenna port p₀ and n_PUCCH^{(1,{tilde over (p)}1)}=(M−

m−

1)·

N_c+m·

N_c+1+n_CCE+1+N_PUCCH⁽¹⁾ for antenna port p₁, where n_CCE is a first CCE index number used for transmission of a corresponding PDCCH in subframe n−

k_m and the corresponding m, where k_m is the smallest value in set K such that UE detects a PDCCH in subframe n−

k_m, N_c=max{0,└

[N_RB^DL·

(N_sc^RB·

c−

4)]/36┘

}, N_RB^DL is a downlink bandwidth configuration, expressed in units of N_sc^RB, N_sc^RB is a resource block size in the frequency domain, expressed as a number of subcarriers, and N_PUCCH⁽¹⁾ is a starting PUCCH channel index for a PUCCH region in an uplink subframe and is configured by high layers for each UE, wherein antenna port p₁ can be used when two antenna port transmission is configured;

or

further comprising instructions when executed perform the following;

determining the enhanced PUCCH resource n_PUCCH^{(1,{tilde over (p)})} for the HARQ-ACK transmission using the lowest ECCE index n_ECCE of the EPDCCH further comprises using the enhanced PUCCH resource n_PUCCH^{(1,{tilde over (p)})} represented by n_PUCCH^{(1,{tilde over (p)}0)=n}_ECCE+Value for antenna port p₀ and n_PUCCH^{(1,{tilde over (p)}1)}=n_ECCE+Value+1 for antenna port p₁, where n_ECCE is the number of the first ECCE used for transmission of the corresponding EPDCCH for the EPDCCH set {tilde over (k)} in subframe n−

k_m and a corresponding m, where k_m is the smallest value in set K such that UE detects an EPDCCH for the EPDCCH set {tilde over (k)} in subframe n−

k_m, and antenna port p₁ can be used when two antenna port transmission is configured.

13. The at least one non-transitory computer readable storage medium of claim 9, wherein for one configured serving cell and the subframe n with M>

1 where 0≦

i≦

M−

1;

further comprising instructions when executed perform the following;

determining the legacy PUCCH resource n_PUCCH,i⁽¹⁾ for a HARQ-ACK transmission using the lowest CCE index n_CCE,i is represented by n_PUCCH,i⁽¹⁾=(M−

i−

1)·

N_c+i·

N_c+1+n_CCE,i+N_PUCCH⁽¹⁾, where c is selected from {0, 1, 2, 3} such that N_c≦

n_CCE,i<

N_c+1, n_CCE,i is a first CCE index number used for transmission of a corresponding PDCCH in subframe n−

k_i, N_c=max{0,└

[N_RB^DL·

(N_sc^RB·

c−

4)]/36┘

}, N_RB^DL is a downlink bandwidth configuration, expressed in units of N_sc^RB, N_sc^RB is a resource block size in the frequency domain, expressed as a number of subcarriers, and N_PUCCH⁽¹⁾ is a starting PUCCH channel index for a PUCCH region in an uplink subframe and is configured by high layers for each UE;

or

further comprising instructions when executed perform the following;

determining the enhanced PUCCH resource n_PUCCH,i⁽¹⁾ for the HARQ-ACK transmission using the lowest ECCE index n_ECCE,i is represented by n_PUCCH,i⁽¹⁾=n_ECCE,i+Value, where n_ECCE,i is the number of the first ECCE used for transmission of the corresponding EPDCCH for the EPDCCH set {tilde over (k)} in subframe n−

k_i.

14. The at least one non-transitory computer readable storage medium of claim 9, wherein for at least two configured serving cells and a subframe n with M≦

2 where k_mε

K on a primary cell, and 0≦

j≦

A−

1 and Aε

{2, 3, 4};

further comprising instructions when executed perform the following;

determining the legacy PUCCH resource n_PUCCH,j⁽¹⁾ for a HARQ-ACK transmission using the lowest CCE index n_CCE,m is represented by n_PUCCH,j⁽¹⁾=(M−

m−

1)·

N_c+m·

N_c+1+n_CCE,m+N_PUCCH⁽¹⁾ and n_PUCCH,j+1⁽¹⁾=(M−

m−

1)·

N_c+m·

N_c+1+n_CCE,m+1+N_PUCCH⁽¹⁾, where c is selected from {0, 1, 2, 3} such that N_c≦

n_CCE,m<

N_c+1, n_CCE,m is a first CCE index number used for transmission of a corresponding PDCCH in subframe n−

k_i, N_c=max{0,└

[N_RB^DL·

(N_sc^RB·

c−

4)]/36┘

}, N_RB^DL is a downlink bandwidth configuration from the primary cell, expressed in units of N_sc^RB, N_sc^RB is a resource block size in the frequency domain, expressed as a number of subcarriers, and N_PUCCH⁽¹⁾ is a starting PUCCH channel index for a PUCCH region in an uplink subframe and is configured by high layers for each UE, and n_PUCCH,j+1⁽¹⁾ is used for a subframe n and a transmission mode that support up to two transport block on a serving cell where a corresponding physical downlink shared channel (PDSCH) transmission occurs;

or

further comprising instructions when executed perform the following;

determining the enhanced PUCCH resource n_PUCCH,j⁽¹⁾ for the HARQ-ACK transmission using the lowest ECCE index n_ECCE,m is represented by n_PUCCH,j⁽¹⁾=n_ECCE,m+Value and n_PUCCH,j+1⁽¹⁾=n_ECCE,m+Value+1, where n_ECCE,m is the number of the first ECCE used for transmission of the corresponding DCI assignment by EPDCCH for the EPDCCH set {tilde over (k)} in subframe n−

k_m, and n_PUCCH,j+1⁽¹⁾ is used for a subframe n and a transmission mode that support up to two transport block on a serving cell where a corresponding PDSCH transmission occurs.

15. The at least one non-transitory computer readable storage medium of claim 9, wherein for at least two configured serving cells and a subframe n with M>

2 where kε

K, k_mε

K for a primary cell;

further comprising instructions when executed perform the following;

determining the legacy PUCCH resource n_PUCCH,1⁽¹⁾ for the HARQ-ACK transmission using the lowest CCE index n_CCE,m is represented by n_PUCCH,1⁽¹⁾=(M−

m−

1)·

N_c+m·

N_c+1+n_CCE,m+N_PUCCH⁽¹⁾, where c is selected from {0, 1, 2, 3} such that N_c≦

n_CCE,m<

N_c+1, n_CCE,m is a first CCE index number used for transmission of a corresponding PDCCH in subframe n−

k_m, N_c=max{0,└

[N_RB^DL·

(N_sc^RB·

c−

4)]/36┘

}, N_RB^DL is a downlink bandwidth configuration from the primary cell, expressed in units of N_sc^RB, N_sc^RB is a resource block size in the frequency domain, expressed as a number of subcarriers, and N_PUCCH⁽¹⁾ is a starting PUCCH channel index for a PUCCH region in an uplink subframe and is configured by high layers for each UE;

or

further comprising instructions when executed perform the following;

determining the enhanced PUCCH resource n_PUCCH,1⁽¹⁾ for the HARQ-ACK transmission using the lowest ECCE index n_ECCE,m is represented by n_PUCCH,1⁽¹⁾=n_ECCE,m+Value, where n_ECCE,m is the number of the first ECCE used for transmission of the corresponding EPDCCH for the EPDCCH set {tilde over (k)} in subframe n−

k_m.

16. An apparatus of a user equipment (UE) operable to provide physical uplink control channel (PUCCH) resource allocation in time division duplex (TDD) for a hybrid automatic retransmission re-quest-acknowledge (HARQ-ACK) transmission in a subframe n, the apparatus comprising one or more processors and memory configured to:

detect a downlink control channel within a prior specified subframe that is received in time before a subframe n, wherein the prior specified subframe includes a subframe n−

k, wherein n and k are integers;

identify when the downlink control channel detected within the prior specified subframe n−

k is an enhanced physical downlink control channel (EPDCCH); and

determine an enhanced PUCCH resource allocation for the HARQ-ACK transmission using a lowest enhanced CCE (ECCE) index of the EPDCCH when the downlink control channel detected in the prior specified subframe n−

k is the EPDCCH.

17. The apparatus of claim 16, further configured to:

identify when the downlink control channel detected within the prior specified subframe n−

k is a physical downlink control channel (PDCCH);

determine a legacy PUCCH resource allocation for the HARQ-ACK transmission using a lowest control channel element (CCE) index of the PDCCH when the downlink control channel detected in the prior specified subframe n−

k is the PDCCH.

18. The apparatus of claim 16, wherein a downlink control channel type is received in the subframe n−

k, where kε

K, where a downlink association set index K is defined in a Table 10.1.3.1-1 in a Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) standard Release 11 Technical Specification (TS) 36.213, and K includes a set of M elements {k₀, k₁, . . . k_M-1} depending on the subframe n and a uplink/downlink (UL/DL) configuration.

19. The apparatus of claim 16, further configured to determine the enhanced PUCCH resource for the subframe n−

k using an integer m, where a k_m is the smallest value in a set K such that the UE detects an EPDCCH in a subframe n−

k_m.

20. The apparatus of claim 16, further configured to decode the enhanced PUCCH resource using a parameter Value represent by Value=ARO+AP+(m+1)·

N_PUCCH^(1,k) where acknowledgement (ACK)/negative ACK (ACK/NACK) Resource Offset (ARO) is an integer offset value derived from a downlink control information (DCI) in the EPDCCH, an antenna port (AP) is parameter (0, . . . ,

     3), a N_PUCCH^(1,k) is a UE specific starting offset value for an EPDCCH set {tilde over (k)}, and m is an integer, where k_m m is the smallest value in a set K such that the UE detects an EPDCCH for an EPDCCH set {tilde over (k)} in subframe n−

k_m.

21. The apparatus of claim 16, wherein the UE includes an antenna, a display screen, a speaker, a microphone, a graphics processor, an application processor, an internal memory, or a non-volatile memory port.