Method for controlling uplink power in multi-subframe scheduling

• US 10,448,339 B2
• Filed: 04/30/2018
• Issued: 10/15/2019
• Est. Priority Date: 04/12/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Zhang, Shichang, Li, Yingyang, Sun, Chengjun
• Primary Examiner(s): Skripnikov, Alex
• Application Number:
  US15/966,418
• Publication Number:
  US 20180249419A1
• Time in Patent Office: 533 Days
• Field of Search: None
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• 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 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 52/04 TPC
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/228 using past power values or information
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• 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

Disclosed is a method for controlling an uplink (UL) power in a multi-subframe scheduling system including a user equipment (UE) receiving a multi-subframe UL scheduling instruction or physical downlink control channel (PDCCH) data of a downlink control information (DCI) format 3/3 A of the UE, in a DL subframe where the multi-subframe UL scheduling instruction is transmitted, and the UE determining a transmitting power of the PUSCH of each UL subframe scheduled by the multi-subframe UL scheduling instruction, based on a power controlling command value, and transmitting corresponding PUSCH data based on the calculated transmitting power.

Claims

1. A method for transmitting data by a user equipment (UE) in a wireless communication system, comprising:

receiving, from a base station, scheduling information for scheduling a plurality of uplink (UL) subframes;

determining a first transmit power for a physical uplink shared channel (PUSCH) in a UL subframe u among the plurality of UL subframes based on a first power adjustment factor for a UL subframe (u−

1) before the UL subframe u among the plurality of UL subframes, in case that the UL subframe u is different from a first subframe scheduled by the scheduling information;

identifying a minimum transmission power from among the first transmission power and a maximum transmission power predetermined for the UE; and

transmitting data through the PUSCH in the UL subframe u using the identified minimum transmission power.

2. The method of claim 1, wherein the scheduling information is received in a downlink control channel.

3. The method of claim 1, further comprising:

determining a second transmit power for the PUSCH in the UL subframe u based on a second power adjustment factor for the UL subframe u, in case that the UL subframe u is the first subframe scheduled by the scheduling information,

wherein the second power adjustment factor is determined based on power control information included in the scheduling information and the first power adjustment factor.

4. The method of claim 1,

wherein the maximum transmission power is predetermined for the UE in the UL subframe u.

5. A user equipment (UE) in a wireless communication system, comprising:

a transceiver; and

at least one processor configured to;

control the transceiver to receive, from a base station, scheduling information for scheduling a plurality of uplink (UL) subframes,

determine a first transmit power for a physical uplink shared channel (PUSCH) in a UL subframe u among the plurality of UL subframes based on a first power adjustment factor for a UL subframe (u−

1) before the UL subframe u among the plurality of UL subframes, in case that the UL subframe u is different from a first subframe scheduled firstly by the scheduling information,

identify a minimum transmission power from among the first transmission power and a maximum transmission power predetermined for the UE, and

control the transceiver to transmit data through the PUSCH in the UL subframe u using the identified minimum transmission power.

6. The UE of claim 5, wherein the scheduling information is received in a downlink control channel.

7. The UE of claim 5,

wherein the at least one processor is further configured to determine a second transmit power for the PUSCH in the UL subframe u based on a second power adjustment factor for the UL subframe u, in case that the UL subframe u is the first subframe scheduled by the scheduling information, and

wherein the second power adjustment factor is determined based on power control information included in the scheduling information and the first power adjustment factor.

8. The UE of claim 5,

wherein the maximum transmission power is predetermined for the UE in the UL subframe u.