Method and device for saving power consumption of electronic device in machine type communication technology
Provided are a communication method and system that integrate 5G communication systems with IoT technologies to support higher data rates after 4G systems. The present disclosure is based on 5G communication technologies and IoT related technologies, and may be applied to intelligent services such as smart homes, smart buildings, smart cities, smart or connected cars, health care, digital education, retail, and security and safety. The present disclosure relates to a method and apparatus for reducing power consumption in an electronic device supporting machine type communication. There is provided a method of signal processing for an electronic device in a mobile communication system. The method may include: obtaining repetition level information for signal reception; determining a decoding start point and decoding period; and making, if the decoding start point arrives, an attempt to decode the repeatedly received signal at every decoding period on the basis of the repetition level information.
1. A method of signal processing for an electronic device in a mobile communication system, the method comprising:
obtaining repetition level information to receive a message repeatedly based on channel state information;
determining a decoding start point and a decoding interval based on the channel state information and the repetition level information; and
in case that the decoding start point arrives, attempting to decode the repeatedly received message based on the decoding interval.
2. The method of claim 1 , further comprising stopping the reception of the message in case that decoding is successful.
3. The method of claim 1 , wherein determining the decoding start point comprises:
determining the decoding start point based on points of time when the message is repeatedly received a number of times corresponding to a repetition level that is lower than the repetition level information by a preset level.
4. The method of claim 1 , wherein the repetition level information is determined based on a comparison between the channel state information and at least one channel state threshold value, and
wherein determining the decoding start point comprises:
comparing the channel state information with the at least one channel state threshold value; and
determining the decoding start point based on points of time when the message is repeatedly received a number of times corresponding to a repetition level that is lower than the repetition level information by a preset level based on a difference between the channel state information and the at least one channel state threshold value.
5. The method of claim 1 , further comprising determining whether a channel condition has changed after obtaining the repetition level information, and wherein determining the decoding start point comprises:
determining, in case that the channel condition has not changed, the decoding start point based on points of time when the message is repeatedly received a number of times corresponding to a repetition level that is lower than the repetition level information by a preset level; and
identifying, in case that the channel condition has changed, an error rate of a channel status, and determining the decoding start point based on the points of time when the message is repeatedly received the number of times corresponding to the repetition level that is lower than the repetition level information by the preset level based on the error rate.
6. The method of claim 1 , wherein determining the decoding start point comprises at least one of:
identifying whether a decoding success probability is greater than or equal to a preset threshold based on an accumulated bit energy of the repeatedly received message, and determining the decoding start point based on points of time when the decoding success probability becomes greater than or equal to the preset threshold; and
identifying whether the message is a predetermined message type, and, in case that the message to be received is the predetermined message type, determining the decoding start point based on the type of the message.
7. The method of claim 1 , wherein determining the decoding interval comprises:
determining the decoding interval based on at least one of the channel state information, a type of the message, or an error rate of a channel status in a time that the repetition level information is obtained.
8. An electronic device capable of signal processing in a mobile communication system, comprising:
a transceiver; and
a controller coupled with the transceiver and configured to:
obtain repetition level information to receive a message repeatedly based on channel state information,
determine a decoding start point and a decoding interval based on the channel state information and the repetition level information, and
attempt, in case that the decoding start point arrives, to decode the repeatedly received message based on the decoding interval.
9. The electronic device of claim 8 , wherein the controller is further configured to stop the reception of the message in case that decoding is successful.
10. The electronic device of claim 8 , wherein the controller is configured to determine the decoding start point based on points of time when the message is repeatedly received a number of times corresponding to a repetition level that is lower than the repetition level information by a preset level.
11. The electronic device of claim 8 , wherein the repetition level information is determined based on a comparison between the channel state information and at least one channel state threshold value, and
wherein the controller is configured to:
compare the channel state information with the at least one channel state threshold value, and
determine the decoding start point based on points of time when the message is repeatedly received a number of times corresponding to a repetition level that is lower than the repetition level information by a preset level based on a difference between the channel state information and the at least one channel state threshold value.
12. The electronic device of claim 8 , wherein the controller is configured to determine whether a channel condition has changed after obtaining the repetition level information,
wherein, in case that the channel condition has not changed, the controller is configured to determine the decoding start point based on points of time when the message is repeatedly received a given number of times corresponding to a repetition level that is lower than the repetition level information by a preset level, and
wherein, in case that the channel condition has changed, the controller is configured to identify an error rate of a channel status and determine the decoding start point based on the points of time when the message is repeatedly received the number of times corresponding to the repetition level that is lower than the repetition level information by the preset level based on the error rate.
13. The electronic device of claim 8 , wherein the controller is configured to:
identify whether a decoding success probability is greater than or equal to a preset threshold based on an accumulated bit energy of the repeatedly received message, and
determine the decoding start point based on points of time when the decoding success probability becomes greater than or equal to the preset threshold.
14. The electronic device of claim 8 , wherein the controller is configured to identify whether the message is a predetermined message type, and
wherein, in case that the message is the predetermined message type, the controller is configured to determine the decoding start point based on the type of the message.
15. The electronic device of claim 8 , wherein the controller is configured to determine the decoding interval based on at least one of the channel state information, a type of the message, or an error rate of a channel status in a time that the repetition level information is obtained.