METHOD AND DEVICE FOR TRANSMITTING SIGNAL IN WIRELESS COMMUNICATION SYSTEM

• US 20180213484A1
• Filed: 07/15/2016
• Published: 07/26/2018
• Est. Priority Date: 07/17/2015
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: OH, Jin-Young, CHOI, Seung-Hoon, KWAK, Young-Woo, NOH, Hoon-Dong, KIM, Dong-Han, SHIN, Cheol-Kyu, KIM, Youn-Sun, RO, Sang-Min
• Granted Patent: US 10,455,514 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/242 taking into account path loss
• CPC Class Codes: H04W 52/36 with a discrete range or set of values, e.g. step size, ramping or offsets
• CPC Class Codes: H04W 52/38 TPC being performed in particular situations
• CPC Class Codes: H04W 52/42 in systems with time, space, frequency or polarisation diversity
• CPC Class Codes: H04W 52/50 at the moment of starting communication in a multiple access environment
• CPC Class Codes: H04W 72/044 based on the type of the allocated resource

Abstract

Disclosed are a communication technique for merging, with IoT technology, a 5G communication system for supporting a data transmission rate higher than that of a 4G system, and a system therefor. The disclosed technique and system can be applied to intelligent services (for example, smart home, smart building, smart city, smart car or connected car, health care, digital education, retailing, security and safety related services, and the like) on the basis of 5G communication technology and IoT related technology. A method for controlling uplink transmission power of a terminal in a wireless communication system comprises the steps of: initializing a power control adjustment value when a repetition level for a coverage enhancement mode is changed; updating the power control adjustment value according to a transmission power control (TPC) command received from a base station; calculating uplink transmission power on the basis of the updated power control adjustment value and the repetition level; and transmitting uplink data or control information by the calculated uplink transmission power.

Claims

1. A method for controlling uplink transmission power of a terminal in a wireless communication system, the method comprising:

identifying uplink transmission power based on a first subframe of a plurality of subframes; and

transmitting uplink data or control information on the plurality of subframes with the uplink transmission power,

wherein the uplink transmission power is maintained on the plurality of subframes.

2. The method as claimed in claim 1, wherein if the uplink transmission power for transmitting the uplink data or the control information on the plurality of subframes is limited to a maximum uplink transmission power, the maximum uplink transmission power is maintained on the plurality of subframes.

3. The method as claimed in claim 1, wherein the plurality of subframes for a uplink repetition transmission are determined based on a repetition level for a coverage enhancement mode and the repetition level is configured through an upper layer signaling message or downlink control information.

4. The method as claimed in claim 1, wherein the plurality of subframes for a uplink repetition transmission are determined based on a repetition level for a coverage enhancement mode and the repetition level is determined in consideration of at least one of a path-loss according to a path between the terminal and the base station, the number of antennas of the terminal, and a size of a reception buffer of the terminal.

5. The method as claimed in claim 1, further comprising:

receiving, from a base station, a transmission power control (TPC); and

updating a power control adjustment value according to the TPC,

wherein the power control adjustment value is updated based on at least one of whether the uplink transmission power is configured from an upper layer, whether a random access response is received, or whether the repetition level of the uplink transmission power is changed.

6. A method by a base station for controlling uplink transmission power of a terminal in a wireless communication system, the method comprising:

transmitting, to the terminal, information on a repetition level for a coverage enhancement mode; and

receiving, from the terminal, the uplink data or the control information on a plurality of subframes with a uplink transmission power,

wherein the uplink transmission power is identified based on a first subframe of the plurality of subframes and maintained on the plurality of subframes.

7. The method as claimed in claim 6, wherein if the uplink transmission power for transmitting the uplink data or the control information on the plurality of subframes is limited to a maximum uplink transmission power, the maximum uplink transmission power is maintained on the plurality of subframes.

8. The method as claimed in claim 6, wherein the plurality of subframes for uplink repetition transmission are determined based on the repetition level and the information on the repetition level is transmitted through an upper layer signaling message or downlink control information.

9. The method as claimed in claim 8, wherein the plurality of subframes for uplink repetition transmission are determined based on the repetition level and the repetition level is determined in consideration of at least one of a path-loss according to a path between the terminal and the base station, the number of antennas of the terminal, and a size of a reception buffer of the terminal.

10. The method as claimed in claim 6, further comprising:

transmitting, to the terminal, a transmission power control (TPC) for updating a power control adjustment value;

wherein the power control adjustment value is updated based on at least one of whether the uplink transmission power is configured from an upper layer, whether a random access response is received, or whether the repetition level of the uplink transmission power is changed.

11. A terminal for controlling uplink transmission power of a terminal in a wireless communication system, the terminal comprising:

a controller configured to;

identify uplink transmission power based on a first subframe of a plurality of subframes, and

transmit uplink data or control information on the plurality of subframes with the uplink transmission power,

wherein the uplink transmission power is maintained on the plurality of subframes.

13. The terminal as claimed in claim 11, wherein if the uplink transmission power for transmitting the uplink data or the control information on the plurality of subframes is limited to a maximum uplink transmission power, the maximum uplink transmission power is maintained on the plurality of subframes.

14. The terminal as claimed in claim 11, wherein the plurality of subframes for uplink repetition transmission are determined based on a repetition level for a coverage enhancement mode and the repetition level is configured through an upper layer signaling message or downlink control information.

15. The terminal as claimed in claim 11, wherein the plurality of subframes for uplink repetition transmission are determined based on a repetition level for a coverage enhancement mode and the repetition level is determined in consideration of at least one of a path-loss according to a path between the terminal and the base station, the number of antennas of the terminal, and a size of a reception buffer of the terminal.

16. The terminal as claimed in claim 11,

wherein the controller is further configured to:

receive, from a base station, a transmission power control (TPC), and

update a power control adjustment value according to the TPC,

wherein the power control adjustment value is updated based on at least one of whether the uplink transmission power is configured from an upper layer, whether a random access response is received, or whether the repetition level of the uplink transmission power is changed.

12. (canceled)

17. A base station for controlling uplink transmission power of a terminal in a wireless communication system, the base station comprising:

a transceiver; and

a controller configured to;

transmit, to the terminal, information on a repetition level for a coverage enhancement mode;

receive, from the terminal, the uplink data or the control information on a plurality of subframes with a uplink transmission power,

wherein the uplink transmission power is identified based on a first subframe of the plurality of subframes and maintained on the plurality of subframes.

18. The base station as claimed in claim 17, wherein if the uplink transmission power for transmitting the uplink data or the control information on the plurality of subframes is limited to a maximum uplink transmission power, the maximum uplink transmission power is maintained on the plurality of subframes.

19. The base station as claimed in claim 17, wherein the plurality of subframes for uplink repetition transmission are determined based on the repetition level and the information on the repetition level is transmitted through an upper layer signaling message or downlink control information.

20. The base station as claimed in claim 19, wherein the plurality of subframes for a uplink repetition transmission are determined based on the repetition level and the repetition level is determined in consideration of at least one of a path-loss according to a path between the terminal and the base station, the number of antennas of the terminal, and a size of a reception buffer of the terminal.

21. The base station as claimed in claim 17,

wherein the controller is further configured to transmit, to the terminal, a transmission power control (TPC) for updating a power control adjustment value, and

wherein the power control adjustment value is updated based on at least one of whether the uplink transmission power is configured from an upper layer, whether a random access response is received, or whether the repetition level of the uplink transmission power is changed.