User equipment and base stations

Abstract

The present invention provides a method, communication device, and integrated circuit to facilitate the execution of an improved downlink control channel monitoring procedure by the UE. [Solution] In a communication system, downlink control information schedules the transmission or reception of data to the communication device. In the first case, based on the downlink control information including a field with two or more bits, one search space set group is determined from among three or more search space set groups to perform the monitoring function. If the determined search space set group is not search space group 0, the communication device switches from the determined search space set group to search space set group 0 after the switching period has expired. In the second case, the time length for which the communication device skips the monitoring function is determined based on the received downlink control information associated with one of two or more time lengths.

Claims

1. A processor that performs the monitoring function for the downlink control channel, The system includes a receiving unit that receives downlink control information via the downlink control channel, The aforementioned downlink control information schedules the transmission or reception of data to the communication device. In the first case, based on the downlink control information including a field having two or more bits, one search space set group is determined from among three or more search space set groups to perform the monitoring function. If the determined search space set group is not search space group 0, the communication device switches from the determined search space set group to search space set group 0 after the switching period has expired. In the second case, the time length for which the communication device skips the monitoring function is determined based on the received downlink control information associated with one of two or more time lengths. Communication device.

2. One of the three or more search space set groups is set as the default group for the search space set. The communication device according to claim 1.

3. The processor determines, based on the field in the downlink control information, the identification information of the search space set group to be used for performing the monitoring function. The communication device according to claim 1.

4. The monitoring function is performed in time slot units, and the length of the mini-slot is one or more OFDM symbols and less than the time slot. The communication device according to claim 1.

5. The monitoring function is performed on a single serving cell of the communication device, or on multiple serving cells of the communication device. The communication device according to claim 1.

6. During the aforementioned switching period, and the switching timer, the timer value is decremented according to the subcarrier interval (SCS). The communication device according to claim 1.

7. The downlink control information schedules downlink wireless resources for data reception by the communication device, and the format of the downlink control information is format 1_1 or 1_2. The downlink control information schedules uplink wireless resources for the transmission of the data by the communication device, and the format of the downlink control information is format 0_1 ​​or 0_2. The communication device according to claim 1.

8. If the field in the downlink control information indicates a first value, the monitoring function is started according to the search space set having a first group index, and the monitoring function is stopped according to the search space set having a second group index. If the field indicates a second value, the monitoring function is started according to the search space set having the second group index, and the monitoring function is stopped according to the search space set having the first group index. The communication device according to claim 1.

9. The aforementioned search space group 0 is the default search space group. The communication device according to claim 1.

10. In the first or second case, the base station sets: The communication device according to claim 1.

11. This is done by communication devices. Steps include performing a monitoring function for the downlink control channel, The step of receiving downlink control information via the downlink control channel, wherein the downlink control information schedules the communication device to transmit or receive data, In the first case, based on the downlink control information including a field having two or more bits, one search space set group is determined from among three or more search space set groups to perform the monitoring function. If the determined search space set group is not search space group 0, the communication device switches from the determined search space set group to search space set group 0 after the switching period has expired. In the second case, the time length for which the communication device skips the monitoring function is determined based on the received downlink control information associated with one of two or more time lengths. method.

12. A processor that generates downlink control information, wherein the downlink control information schedules the transmission or reception of data to a communication device, A transmitting unit transmits the downlink control information to the communication device via the downlink control channel based on the currently used search space set group, Equipped with, In the first case, based on the downlink control information including a field having two or more bits, one search space set group is determined from among three or more search space set groups to be used by the communication device for the monitoring function of the downlink control channel. If the determined search space set group is not search space group 0, the communication device switches from the determined search space set group to search space set group 0 after the switching period has expired. In the second case, the time length for which the communication device skips the monitoring function is determined based on the received downlink control information associated with one of two or more time lengths. Base station.

13. The processor identifies the search space set group by setting the field in the downlink control information. The base station according to claim 12.

14. Determining the currently used search space set group is done by the processor, - Transition period that begins when using the first search space set group Based on the above, and after the expiration of the switching period, the communication device determines a search space set group for performing the monitoring function, which is different from the first search space set group. The base station according to claim 13.

15. Performed by the base station, A step of generating downlink control information, wherein the downlink control information schedules the transmission or reception of data to a communication device. The steps include transmitting the downlink control information to the communication device via the downlink control channel based on the currently used search space set group, In the first case, based on the downlink control information including a field having two or more bits, one search space set group is determined from among three or more search space set groups to be used by the communication device for the monitoring function of the downlink control channel. If the determined search space set group is not search space group 0, the communication device switches from the determined search space set group to search space set group 0 after the switching period has expired. In the second case, the time length for which the communication device skips the monitoring function is determined based on the received downlink control information associated with one of two or more time lengths. method.

16. An integrated circuit for controlling the process of a communication device, wherein the process is performed by the communication device. The process that performs the monitoring function for the downlink control channel, A process for receiving downlink control information via the downlink control channel, the process for scheduling the transmission or reception of data to the communication device, includes: In the first case, based on the downlink control information including a field having two or more bits, one search space set group is determined from among three or more search space set groups to perform the monitoring function. If the determined search space set group is not search space group 0, the communication device switches from the determined search space set group to search space set group 0 after the switching period has expired. In the second case, the time length for which the communication device skips the monitoring function is determined based on the received downlink control information associated with one of two or more time lengths. Integrated circuit.

17. An integrated circuit for controlling a base station process, wherein the process is performed by the base station. A process for generating downlink control information, wherein the downlink control information includes a process for scheduling data transmission or reception to a communication device. The process includes transmitting the downlink control information to the communication device via the downlink control channel based on the currently used search space set group, In the first case, based on the downlink control information including a field having two or more bits, one search space set group is determined from among three or more search space set groups to be used by the communication device for the monitoring function of the downlink control channel. If the determined search space set group is not search space group 0, the communication device switches from the determined search space set group to search space set group 0 after the switching period has expired. In the second case, the time length for which the communication device skips the monitoring function is determined based on the received downlink control information associated with one of two or more time lengths. Integrated circuit.

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