APPARATUS AND METHOD FOR UPLINK TRANSMISSION IN WIRELESS COMMUNICATION SYSTEMS

• US 20130077569A1
• Filed: 09/20/2012
• Published: 03/28/2013
• Est. Priority Date: 09/22/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: NG, Boon Loong, ZHANG, Jianzhong, NAM, Young-Han
• Granted Patent: US 8,743,791 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/242 taking into account path loss
• CPC Class Codes: H04W 52/288 taking into account the usage mode, e.g. hands-free, data transmission, telephone
• CPC Class Codes: H04W 52/322 Power control of broadcast channels
• CPC Class Codes: H04W 52/58 Format of the TPC bits

Abstract

An apparatus and method for a User Equipment in a wireless network including at least one Base Station (BS) are provided. The method includes receiving an Information Element (IE) for configuring at least one of a PUSCH power control method and a PUSCH DMRS generation method from the BS, determining a state of the IE, and transmitting a PUSCH and a DMRS for the PUSCH according to the state of the IE. A transmission power of the PUSCH is controlled and a base sequence for the PUSCH DMRS is generated according to the state of the IE. When the state of the IE indicates a first state, the transmission power of the PUSCH is determined according to a first power control equation. When the state of the IE indicates a second state, the transmission power of the PUSCH is determined according to a second power control equation.

Claims

1. A method of a User Equipment (UE) in a wireless network including at least one Base Station (BS), the method comprising:

receiving an Information Element (IE) for configuring at least one of a Physical Uplink Shared Channel (PUSCH) power control method and a PUSCH Demodulation Reference Signal (DMRS) generation method from the at least one BS;

determining a state of the IE; and

transmitting a PUSCH and a DMRS for the PUSCH according to the state of the IE,

wherein a transmission power of the PUSCH is controlled according to the state of the IE,

wherein, when the state of the IE indicates a first state, then the transmission power of the PUSCH is determined according to a first power control equation,

wherein, when the state of the IE indicates a second state, then the transmission power of the PUSCH is determined according to a second power control equation, and

wherein a base sequence for the PUSCH DMRS is generated according to the state of the IE.

2. The method of claim 1, wherein, when the state of the IE indicates the first state, then the base sequence is generated according to a physical cell Identifier (ID) assigned for a cell corresponding to the at least one BS, and

wherein, when the state information of the IE indicates the second state, the base sequence is generated according to a virtual cell ID.

3. The method of claim 1, wherein, when the state of the IE indicates the first state, then the base sequence is generated according to a first virtual cell Identifier (ID), and

wherein, when the state information of the IE indicates the second state, the base sequence is generated according to a second virtual cell ID.

4. The method of claim 1, wherein, the first power control equation is a function of a path-loss measurement based upon Cell-specific Reference Signals (RSs) (CRSs), and

wherein the second power control equation is a function of a path-loss measurement based upon Channel State Information (CSI)-RSs that are configured according to a CSI-RS configuration.

5. The method of claim 1, wherein, the first power control equation is a function of a path-loss measurement based upon Channel State Information (CSI)-Reference Signals (RSs) that are configured according to a first CSI-RS configuration, and

wherein the second power control equation is a function of a path-loss measurement based upon CSI-RSs that are configured according to a second CSI-RS configuration.

6. The method of claim 1, wherein the IE is transmitted in a Radio Resource Control (RRC) layer of the wireless network.

7. The method of claim 1, wherein the IE is an at least one-bit field included in at least one of a Downlink Control Information (DCI) format 0 message and a DCI format 4 message.

8. A User Equipment (UE) apparatus for communicating in a wireless network including at least one Base Station (BS), the apparatus comprising:

a transceiver for receiving an Information Element (IE) for configuring at least one of a Physical Uplink Shared Channel (PUSCH) power control method and a PUSCH Demodulation Reference Signal (DMRS) generation method from the at least one BS, and for transmitting a PUSCH and a DMRS for the PUSCH according to a state of the IE; and

a controller for determining the state of the IE, for determining a transmission power of the PUSCH according to the state of the IE, and for generating a base sequence for the PUSCH DMRS according to the state of the IE,

wherein, when the state of the IE indicates a first state, then the controller determines the transmission power of the PUSCH according to a first power control equation, and

wherein, when the state of the IE indicates a second state, then the controller determines the transmission power of the PUSCH according to a second power control equation.

9. The apparatus of claim 8, wherein, when the state of the IE indicates the first state, then the controller generates the base sequence according to a physical cell Identifier (ID) assigned for a cell corresponding to the at least one BS, and

wherein, when the state information of the IE indicates the second state, the controller generates the base sequence according to a virtual cell ID.

10. The apparatus of claim 8, wherein, when the state of the IE indicates the first state, then the controller generates the base sequence according to a first virtual cell Identifier (ID), and

wherein, when the state information of the IE indicates the second state, then the controller generates the base sequence according to a second virtual cell ID.

11. The apparatus of claim 8, wherein, the first power control equation is a function of a path-loss measurement based upon Cell-specific Reference Signals (RSs) (CRSs), and

wherein the second power control equation is a function of a path-loss measurement based upon Channel State Information (CSI)-RSs that are configured according to a CSI-RS configuration.

12. The apparatus of claim 8, wherein, the first power control equation is a function of a path-loss measurement based upon Channel State Information (CSI)-Reference Signals (RSs) that are configured according to a first CSI-RS configuration, and

wherein the second power control equation is a function of a path-loss measurement based upon CSI-RSs that are configured according to a second CSI-RS configuration.

13. The apparatus of claim 8, wherein the transceiver receives the IE in a Radio Resource Control (RRC) layer of the wireless network.

14. The apparatus of claim 8, wherein the transceiver receives the IE as an at least a one-bit field included in at least one of a Downlink Control Information (DCI) format 0 message and a DCI format 4 message.

15. A Base Station (BS) apparatus for communicating in a wireless network including at least one User Equipment (UE), the apparatus comprising:

a controller for determining a state of an Information Element (IE) for configuring at least one of a Physical Uplink Shared Channel (PUSCH) power control method and a PUSCH Demodulation Reference Signal (DMRS) generation method of the at least one UE; and

a transceiver for transmitting the IE to the at least one UE, for receiving a PUSCH and a DMRS for the PUSCH according to the state of the IE from the at least one UE, and for receiving a base sequence for the PUSCH DMRS according to the state of the IE,

wherein, when the state of the IE indicates a first state, then the transceiver receives the transmission power of the PUSCH according to a first power control equation, and

wherein, when the state of the IE indicates a second state, then the transceiver receives the transmission power of the PUSCH according to a second power control equation.

16. The apparatus of claim 15, wherein when the controller determines the IE to have the first state, then the base sequence is generated according to a physical cell Identifier (ID) assigned for a cell corresponding to the BS, and

wherein, the controller determines the IE to have the second state, then the base sequence is generated according to a virtual cell ID.

17. The apparatus of claim 15, wherein when the controller determines the IE to have the first state, then the base sequence is generated according to a first virtual cell Identifier (ID), and

wherein, when the controller determines the IE to have the second state, then the base sequence is generated according to a second virtual cell ID.

18. The apparatus of claim 15, wherein, the first power control equation is a function of a path-loss measurement based upon Cell-specific Reference Signals (RSs) (CRSs), and

wherein the second power control equation is a function of a path-loss measurement based upon Channel State Information (CSI)-RSs that are configured according to a CSI-RS configuration.

19. The apparatus of claim 15, wherein, the first power control equation is a function of a path-loss measurement based upon Channel State Information (CSI)-Reference Signals (RSs) that are configured according to a first CSI-RS configuration, and

wherein the second power control equation is a function of a path-loss measurement based upon CSI-RSs that are configured according to a second CSI-RS configuration.

20. The apparatus of claim 15, wherein the transceiver transmits the IE in a Radio Resource Control (RRC) layer of the wireless network.

21. The apparatus of claim 15, wherein the transceiver transmits the IE as an at least a one-bit field included in at least one of a Downlink (DL) Control Information (DCI) format 0 message and a DCI format 4 message.