OBTAINING CONTROL CHANNEL ELEMENTS OF PHYSICAL DOWNLINK CONTROL CHANNELS FOR CROSS-CARRIER SCHEDULING

• US 20160037543A1
• Filed: 10/08/2015
• Published: 02/04/2016
• Est. Priority Date: 01/03/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Papasakellariou, Aris
• Granted Patent: US 10,165,582 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/003 Arrangements for allocating sub-channels of the transmission path
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• 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
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

Methods and apparatus of a NodeB or a user equipment (UE) in communication with each other are provided. The NodeB transmits and the UE receives via a Physical Downlink Control Channel (PDCCH). Control Channel Elements (CCEs) corresponding to a PDCCH candidate are obtained based on n_CI, where n_CI is a carrier index.

Claims

1. A method for wireless communication, the method comprising:

receiving configuration information indicating at least one physical resource block (PRB) for a physical downlink control channel (PDCCH);

identifying a carrier indicator n_CI for monitoring PDCCH candidates; and

determining the PDCCH candidates based on

2. The method of claim 1, wherein the Y_p,k is defined by Y_p,k=(A_p·

Y_p,k-1)mod D_p, and wherein Y_p,-1=RNTI, A_p=39827+f₂(p), D_p=65537, f₂(0)=0, f₂(1)=2, and RNTI is a cell-radio network temporary identifier (C-RNTI) assigned to the terminal.

3. The method of claim 1, wherein the PDCCH conveys a DCI format that includes a Carrier Indicator Field (CIF);

and

wherein the CIF has a CIF value indicating the second carrier of the one of the PDSCH reception and the PUSCH transmission if the respective PDCCH location at least partially overlaps with a candidate PDCCH location for scheduling the one of the PDSCH reception and the PUSCH transmission on a different one of the plurality of carriers and the CIF value is a fixed value otherwise.

4. The method of claim 3, wherein the fixed value is equal to all zeroes and the UE suspends the one of the PDSCH reception and the PUSCH transmission when it is expected by the UE that the CIF value will be equal to all zeroes and the CIF value in the DCI format will not be equal to all zeroes.

5. A method for wireless communication, the method comprising:

transmitting configuration information indicating at least one physical resource block (PRB) for a physical downlink control channel (PDCCH);

wherein a carrier indicator n_CI for monitoring PDCCH candidates is identified;

wherein the PDCCH candidates are determined based on

6. The method of claim 5, wherein the Y_p,k is defined by Y_p,k=(A_p·

Y_p,k-1)mod D_p, and wherein Y_p,-1=RNTI, A_p=39827+f₂(p), D_p=65537, f₂(0)=0, f₂(1)=2, and RNTI is a cell-radio network temporary identifier (C-RNTI) assigned to the terminal.

7. The method of claim 5, wherein the PDCCH conveys a DCI format that includes a Carrier Indicator Field (CIF);

and

wherein the CIF has a CIF value indicating the second carrier of the one of the PDSCH reception and the PUSCH transmission if the respective PDCCH location at least partially overlaps with a candidate PDCCH location for scheduling the one of the PDSCH reception and the PUSCH transmission on a different one of the plurality of carriers and the CIF value is a fixed value otherwise.

8. The method of claim 7, wherein the fixed value is equal to all zeroes and the UE suspends the one of the PDSCH reception and the PUSCH transmission when it is expected by the UE that the CIF value will be equal to all zeroes and the CIF value in the DCI format will not be equal to all zeroes.

9. A base station comprising:

a transceiver configured to transmit configuration information to a terminal indicating at least one physical resource block (PRB) for a physical downlink control channel (PDCCH);

wherein a carrier indicator n_CI for monitoring PDCCH candidates is identified;

wherein the PDCCH candidates are determined based on

10. The base station of claim 9, wherein the Y_p,k is defined by Y_p,k=(A_p·

Y_p,k-1)mod D_p, and wherein Y_p-1=RNTI, A_p=39827+f₂(p), D_p=65537, f₂(0)=0, f₂(1)=2, and RNTI is a cell-radio network temporary identifier (C-RNTI) assigned to the terminal.

11. The base station of claim 9, wherein the PDCCH conveys a DCI format that includes a Carrier Indicator Field (CIF);

and

wherein the CIF has a CIF value indicating the second carrier of the one of the PDSCH reception and the PUSCH transmission if the respective PDCCH location at least partially overlaps with a candidate PDCCH location for scheduling the one of the PDSCH reception and the PUSCH transmission on a different one of the plurality of carriers and the CIF value is a fixed value otherwise.

12. The base station of claim 11, wherein the fixed value is equal to all zeroes and the UE suspends the one of the PDSCH reception and the PUSCH transmission when it is expected by the UE that the CIF value will be equal to all zeroes and the CIF value in the DCI format will not be equal to all zeroes.

13. A User Equipment (UE) comprising:

a transceiver configured to receive configuration information indicating at least one physical resource block (PRB) for a physical downlink control channel (PDCCH);

a processor configured to;

identify a carrier indicator n_CI for monitoring PDCCH candidates; and

determine the PDCCH candidates based on

14. The UE of claim 13, wherein the Y_p,k is defined by Y_p,k=(A_p·

Y_p,k-1)mod D_p, and wherein Y_p,-1=RNTI, A_p=39827+f₂(p), D_p=65537, f₂(0)=0, f₂(1)=2, and RNTI is a cell-radio network temporary identifier (C-RNTI) assigned to the terminal.

15. The UE of claim 13, wherein the PDCCH conveys a DCI format that includes a Carrier Indicator Field (CIF);

and

wherein the CIF has a CIF value indicating the second carrier of the one of the PDSCH reception and the PUSCH transmission if the respective PDCCH location at least partially overlaps with a candidate PDCCH location for scheduling the one of the PDSCH reception and the PUSCH transmission on a different one of the plurality of carriers and the CIF value is a fixed value otherwise.

16. The UE of claim 15, wherein the fixed value is equal to all zeroes and the UE suspends the one of the PDSCH reception and the PUSCH transmission when it is expected by the UE that the CIF value will be equal to all zeroes and the CIF value in the DCI format will not be equal to all zeroes.