Communication method and device in a wireless communication system
According to the invention, a wireless device communicates with a base station by applying a first downlink-uplink (DL-UL) setting that sets a plurality of downlink subframes and a plurality of uplink subframes at different times. The wireless device communicates with the base station by using at least one auxiliary subframe when receiving a second UL-DL setting from the base station.
1. A communication method in a wireless communication system, comprising:
communicating with a base station by applying a first downlink (DL)-uplink (UL) configuration that configures a plurality of DL subframes and a plurality of UL subframes at different times;
receiving, from the base station, a second DL-UL configuration which overrides the first UL-DL configuration;
temporarily communicating with the base station by using at least one auxiliary subframe upon receiving the second DL-UL configuration from the base station and before applying the second DL-UL configuration; and
communicating with the base station by applying the second DL-UL configuration,
wherein the at least one auxiliary subframe includes at least one DL subframe or at least one UL subframe common to the first DL-UL configuration and the second DL-UL configuration,
wherein the at least one auxiliary subframe is used while a timer is running, and the timer starts upon receiving the second DL-UL configuration.
2. The communication method of claim 1 , wherein the at least one auxiliary subframe is predefined.
3. The communication method of claim 1 , wherein information on the at least one auxiliary subframe is received from the base station.
4. The communication method of claim 1 , wherein the at least one auxiliary subframe is used during a specific time period until the second DL-UL configuration is applied.
5. The communication method of claim 1 , wherein the wireless communication system is a time division duplex (TDD) system.
6. The communication method of claim 1 , wherein the wireless communication system is a half duplex-frequency division duplex (HD-FDD) system.
7. A wireless device in a wireless communication system, comprising:
a radio frequency (RF) unit configured for transmitting and receiving a radio signal; and
a processor operably coupled to the RF unit and configured to:
communicate with a base station by applying a first downlink (DL)-uplink (UL) configuration for configuring a plurality of DL subframes and a plurality of UL subframes at different times;
receive, from the base station, a second DL-UL configuration which overrides the first UL-DL configuration;
temporarily communicate with the base station by using at least one auxiliary subframe upon receiving the second DL-UL configuration from the base station and before applying the second DL-UL configuration; and
communicate with the base station by applying the second DL-UL configuration,
wherein the at least one auxiliary subframe includes at least one DL subframe or at least one UL subframe common to the first DL-UL configuration and the second DL-UL configuration,
wherein the at least one auxiliary subframe is used while a timer is running, and the timer starts upon receiving the second DL-UL configuration.
8. The wireless device of claim 7 , wherein the at least one auxiliary subframe is predefined.
9. The wireless device of claim 7 , wherein the at least one auxiliary subframe is used during a specific time period until the second DL-UL configuration is applied.
10. The wireless device of claim 7 , wherein the wireless device supports time division duplex (TDD) or half-duplex-frequency division duplex (HD-FDD).