Apparatus having multiple rf chains coupled to multiple antennas and operating method thereof in wireless communication system

Patent metadata

Field	Value
Publication number	US-2019123787-A1
Application number	US-201816164210-A
Country	US
Kind code	A1
Filing date	Oct 18, 2018
Priority date	Oct 19, 2017
Publication date	Apr 25, 2019
Grant date	—

Abstract

The present disclosure relates to a 5G or pre-5G communication system for supporting a data rate higher than that of 4G communication systems such as LTE systems. A method for controlling a device having a plurality of radio frequency (RF) chains coupled to a plurality of antennas in a wireless communication system according to an embodiment of the present invention includes comparing a measured temperature of the device with a temperature threshold, controlling status of at least one of the RF chains according to a comparison result between the measured temperature and the temperature threshold, and transmitting a radio signal using at least one of the antennas that is connected to the at least one RF chain.

First claim

What is claimed is:

1 . A method for controlling a device having a plurality of radio frequency (RF) chains coupled to a plurality of antennas in a wireless communication system, the method comprising;
comparing a measured temperature of the device with a temperature threshold; controlling a status of at least one of the RF chains according to a comparison result between the measured temperature and the temperature threshold; and transmitting a radio signal using at least one of the antennas that is connected to the at least one RF chain.

2 . The method of claim 1 , wherein controlling the status of the at least one RF chain comprises at least one of:
selecting the at least one RF chain for use in radio communication among the RF chains; adjusting a use time of the at least one RF chain; and adjusting a transmit power of the at least one RF chain.

3 . The method of claim 1 , further comprising:
receiving, before controlling the status of the at least one RF chain, information on an electric field measured by a receiving device that receives the radio signal; and comparing an electric field value corresponding to the electric field information with a first threshold value.

4 . The method of claim 3 , further comprising: if the measured temperature is greater than the temperature threshold and if the electric field value is less than or equal to the first threshold value, decreasing a use time of the at least one RF chain and increasing a transmit power of the at least one RF chain.

5 . The method of claim 3 , further comprising: if the measured temperature is greater than the temperature threshold and if the electric field value is greater than the first threshold value, comparing the electric field value with a second threshold value.

6 . The method of claim 5 , further comprising: if the electric field value is less than or equal to the second threshold value, decreasing a use time of the at least one RF chain.

7 . The method of claim 5 , further comprising: when the electric field value is greater than the second threshold value, decreasing a number of the at least one RF chain and a use time of the at least one RF chain.

8 . The method of claim 2 , wherein adjusting the use time of the at least one RF chain comprises at least one of:
decreasing the use time of the at least one RF chain by muting downlink transmission in at least one subframe configured for downlink transmission; and providing an upper layer with the measured temperature and per-user data rates for adjusting data amount in a downlink data buffer of the device and receiving data adjusted in an amount based on the measured temperature and the per-user data rate from the upper layer.

9 . The method of claim 1 , wherein the temperature is measured by at least one sensor installed inside or outside the device.

10 . The method of claim 1 , wherein the electric field information is a channel quality indicator (CQI) or a measurement report.

11 . A device equipped with a plurality of radio frequency chains coupled to a plurality of antennas, the device comprising:
a transceiver configured to transmit and receive a signal; and a controller configured to:
control to compare a measured temperature of the device with a temperature threshold,
control a status of at least one of the RF chains according to a comparison result between the measured temperature and the temperature threshold, and
transmit a radio signal using at least one of the antennas that is connected to the at least one RF chain.

12 . The device of claim 11 , wherein the controller is further configured to:
select the at least one RF chain for use in radio communication among the RF chains, adjust a use time of the at least one RF chain, or adjust a transmit power of the at least one RF chain.

13 . The device of claim 11 , wherein the controller is further configured to receive, before controlling the status of the at least one RF chain, information on an electric field measured by a receiving device that receives the radio signal and compare an electric field value corresponding to the electric field information with a first threshold value.

14 . The device of claim 13 , wherein the controller is further configured to, if the measured temperature is greater than the temperature threshold and if the electric field value is less than or equal to the first threshold value, decrease a use time of the at least one RF chain and increasing a transmit power of the at least one RF chain.

15 . The device of claim 13 , wherein the controller is further configured to, if the measured temperature is greater than the temperature threshold and if the electric field value is greater than the first threshold value, compare the electric field value with a second threshold value.

16 . The device of claim 15 , wherein the controller is further configured to, if the electric field value is less than or equal to-the second threshold value, decrease the use time of the at least one RF chain.

17 . The device of claim 15 , wherein the controller is further configured to, when the electric field value is greater than the second threshold value, decrease a number of the at least one RF chain and the use time of the at least one RF chain.

18 . The device of claim 12 , wherein the controller is further configured to decrease the use time of the at least one RF chain by muting downlink transmission in at least one subframe configured for downlink transmission and provide an upper layer with the measured temperature and per-user data rates for adjusting data amount in a downlink data buffer of the device and receiving data adjusted in an amount based on the measured temperature and the per-user data rate from the upper layer.

19 . The device of claim 11 , wherein the temperature is measured by at least one sensor installed inside or outside the device.

20 . The device of claim 11 , wherein the electric field information is a channel quality indicator (CQI) or a measurement report.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Seol Daeyoung
• Hur Sukkyun
• Na Jaeeun

Classifications

• H04B7/0802

  using antenna selection (H04B7/0868 takes precedence; antenna beam directivity switching H01Q3/24) · CPC title

• H04B7/0602 Primary

  using antenna switching (H04B7/0686 takes precedence; antenna beam directivity switching H01Q3/24) · CPC title

• H04B7/0413 Primary

  MIMO systems · CPC title

• H04W24/10

  Scheduling measurement reports {; Arrangements for measurement reports} · CPC title

• H04L5/14

  Two-way operation using the same type of signal, i.e. duplex · CPC title