Control channel resource allocation method and apparatus

• US 9,432,973 B2
• Filed: 01/30/2014
• Issued: 08/30/2016
• Est. Priority Date: 08/15/2011
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Tang, Zhenfei, Gong, Zhengwei
• Primary Examiner(s): Sinkantarakorn, Pao
• Assistant Examiner(s): Phillips, Michael
• Application Number:
  US14/168,758
• Publication Number:
  US 20140146720A1
• Time in Patent Office: 943 Days
• US Class Current: 1/1
• 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 5/14 Two-way operation using the same type of signal, i.e. duplex
• 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

Embodiments of the present invention disclose a control channel resource allocation method and apparatus, where the control channel resource allocation method includes: determining a VRB number corresponding to a first physical downlink control channel or a serial number of the first CCE for the first physical downlink control channel to transmit DCI, where the first physical downlink control channel includes an S-PDCCH or an R-PDCCH; and obtaining, according to the VRB number or the serial number of the first CCE, an offset, and a PUCCH parameter, a PUCCH format 1a or 1b resource number corresponding to the first physical downlink control channel.

Claims

1. A control channel resource allocation method for a time division duplexing (TDD) system, the method comprising:

determining, by a processor, a virtual resource block (VRB) number corresponding to a first physical downlink control channel (PDCCH), wherein the first PDCCH comprises;

a secondary physical downlink control channel (S-PDCCH) or a relay physical downlink control channel (R-PDCCH); and

obtaining, by the processor, according to the VRB number, an offset and a physical uplink control channel (PUCCH) parameter, a PUCCH format 1a or 1b resource number corresponding to the first PDCCH;

wherein obtaining the PUCCH format 1a or 1b resource number corresponding to the first PDCCH further comprises adding the offset to the VRB number and then adding the PUCCH parameter;

wherein the first PDCCH does not use cross-interleaving;

wherein the offset comprises the sum of the total quantity N_CCE,all^PDCCH of control channel elements (CCEs) of the first PDCCH in M subframes and a second offset N_offset, wherein the M subframes are downlink subframes corresponding to uplink subframes for feeding back a positive acknowledgement (ACK) or a negative acknowledgement (NACK), and M is an integer greater than or equal to 1.

2. The method according to claim 1, wherein:

the offset comprises a reference signal offset N_offset^RS, wherein the reference signal offset N_offset^RS is determined by an antenna port p of a user equipment (UE)-specific reference signal supporting the S-PDCCH or R-PDCCH transmission.

3. The method according to claim 2, wherein N_offset^RS=p−

7, wherein p is selected from any one of the following sets;

pε

{7};

pε

{7,8};

pε

{7,8,9,10}; and

pε

{17,8,9,10,11,12,13,14}.

4. The method according to claim 1, wherein the offset comprises a reference signal offset N_offset^RS, wherein the reference signal offset N_offset^RS is determined by a quasi-random sequence initialization parameter of a reference signal sequence supporting S-PDCCH or R-PDCCH transmission.

5. The method according to claim 4, wherein the quasi-random sequence initialization parameter of the reference signal sequence supporting the S-PDCCH or R-PDCCH transmission comprises:

X or n_SCID in a quasi-random sequence initialization formula c_init=(└

n_s/2┘

+1)·

(2X+1)·

2¹⁶+n_SCID, wherein X is a cell ID, n_SCID is a scrambling ID, and n_s is a slot number within a radio frame.

6. A control channel resource allocation method for a time division duplexing (TDD) system, the method comprising:

determining, by a processor, a serial number of a first control channel element (CCE) for the first physical downlink control channel (PDCCH), wherein the first PDCCH comprises a secondary physical downlink control channel (S-PDCCH) or a relay physical downlink control channel (R-PDCCH); and

obtaining, by the processor, according to the serial number, an offset and a physical uplink control channel (PUCCH) parameter, a PUCCH format 1a or 1b resource number corresponding to the first PDCCH;

wherein obtaining the PUCCH format 1a or 1b resource number corresponding to the first PDCCH further comprises adding the offset to the serial number of the first CCE and then adding the PUCCH parameter;

wherein the first PDCCH does not use cross-interleaving;

wherein the offset comprises the sum of the total quantity N_CCE,all^PDCCH of control channel elements (CCEs) of the first PDCCH in M subframes and a fourth offset N_offset, wherein the M subframes are downlink subframes corresponding to uplink subframes for feeding back a positive acknowledgement (ACK) or a negative acknowledgement (NACK), and M is an integer greater than or equal to 1.

7. The method according to claim 6, wherein the offset comprises a reference signal offset N_offset^RS, and wherein the reference signal offset N_offset^RS is determined by an antenna port p of user equipment (UE)-specific reference signal supporting the S-PDCCH or R-PDCCH transmission.

8. The method according to claim 7, wherein N_offset^RS=p−

7, wherein p is selected from any one of the following sets;

pε

{7};

pε

{7,8};

pε

{7,8,9,10}; and

pε

{17,8,9,10,11,12,13,14}.

9. The method according to claim 6, wherein the offset comprises a reference signal offset N_offset^RS, and wherein the reference signal offset N_offset^RS is determined by a quasi-random sequence initialization parameter of a reference signal sequence supporting S-PDCCH or R-PDCCH transmission.

10. The method according to claim 9, wherein the quasi-random sequence initialization parameter of the reference signal sequence supporting the S-PDCCH or R-PDCCH transmission comprises:

X or n_SCID in a quasi-random sequence initialization formula c_init=(└

n_s/2┘

+1)·

(2X+1)·

2¹⁶+n_SCID, wherein X is a cell ID, n_SCID is a scrambling ID, and n_s is a slot number within a radio frame.

11. A control channel resource allocation method, comprising:

determining, by a processor, a virtual resource block (VRB) number corresponding to a first physical downlink control channel (PDCCH), wherein the first PDCCH comprises;

a secondary physical downlink control channel (S-PDCCH) or a relay physical downlink control channel (R-PDCCH); and

obtaining, by the processor, a PUCCH format 1a or 1b resource number corresponding to the first PDCCH according to the VRB number, an offset and a physical uplink control channel (PUCCH) parameter;

wherein the offset comprises a reference signal offset N_offset^RS, wherein the reference signal offset N_offset^RS is determined by an antenna port p of a user equipment (UE)-specific reference signal supporting the S-PDCCH or R-PDCCH transmission; and

wherein N_offset^RS=p−

7, wherein p is selected from any one of the following sets;

pε

{7};

pε

{7,8};

pε

{7,8,9,10}; and

pε

{17,8,9,10,11,12,13,14}.

12. A control channel resource allocation method, comprising:

determining, by a processor, a virtual resource block (VRB) number corresponding to a first physical downlink control channel (PDCCH), wherein the first PDCCH comprises;

a secondary physical downlink control channel (S-PDCCH) or a relay physical downlink control channel (R-PDCCH); and

obtaining, by the processor, a PUCCH format 1a or 1b resource number corresponding to the first PDCCH according to the VRB number, an offset and a physical uplink control channel (PUCCH) parameter;

wherein the offset comprises a reference signal offset N_offset^RS, wherein the reference signal offset N_offset^RS is determined by a quasi-random sequence initialization parameter of a reference signal sequence supporting S-PDCCH or R-PDCCH transmission; and

wherein the quasi-random sequence initialization parameter of the reference signal sequence supporting the S-PDCCH or R-PDCCH transmission comprises;

X or n_SCID in a quasi-random sequence initialization formula c_init=(└

n_s/2┘

+1)·

(2X+1)·

2¹⁶+n_SCID, wherein X is a cell ID, n_SCID is a scrambling ID, and n_s is a slot number within a radio frame.