Transmission of control information
The present disclosure includes as one aspect a device comprising: a receiver capable of receiving control signal from a base station in a first set of control resources and in a second set of control resources, a transmitter capable of transmitting control signals and data, a circuitry which, when in operation, controls: the transmitter to transmit a random access message associated with the first set of control resources and to transmit communication device capability indication; the receiver to monitor control resources in the first set of control resources after transmitting the random access message and to receive within the first set of control resources configuration of the second set of control resources; the receiver to monitor control resources in the first set of control resources and/of or in the second set of control resources after receiving the configuration of the second set of control resources.
1. A communication apparatus, comprising:
a receiver, which, in operation, receives control signals from a base station in a first control resource set and in a second control resource set;
a transmitter capable of transmitting, which, in operation, transmits a control signal and data; and
a circuitry, which, in operation:
controls the receiver to receive at least one entry, included in system information, out of a plurality of entries wherein each of the entries represents a respective candidate for configuration of the first control resource set;
determines, based on the at least one entry, a configuration of the first control resource set, wherein the configuration of the first control resource set includes parameters corresponding to a subcarrier spacing and a bandwidth of the first control resource set;
controls the transmitter to transmit a random access message associated with the first control resource set and to transmit a communication apparatus capability indication;
controls the receiver to monitor control resources in the first control resource set after transmitting the random access message and to receive within the first control resource set an indication of a configuration of the second control resource set; and
controls the receiver to monitor control resources in the first control resource set and/or in the second control resource set after receiving the configuration of the second control resource set.
2. The communication device apparatus according to claim 1 , wherein
the first control resource set is located within a first bandwidth and the second control resource set is located within a second bandwidth,
the first bandwidth is a bandwidth in which any resources allocated by control information carried in the first control resource set are located, and
the second bandwidth is a bandwidth in which any resources allocated by control information carried in the second control resource set are located.
3. The communication apparatus according to claim 2 , wherein the first bandwidth and the second bandwidth are centered in a frequency domain.
4. The communication apparatus according to claim 2 , wherein
a bandwidth of the first control resource set is included in a bandwidth of the second control resource set, or
the first control resource set is a subset of the second control resource set.
5. The communication apparatus according to claim 1 , wherein
the first control resource set includes common control information be decoded by a plurality of communication apparatuses as well as user specific control information to be decoded only by a specific communication apparatus, and
the second control resource set includes the user specific control information.
6. The communication apparatus according to claim 1 , wherein the circuitry, in operation, controls the receiver to monitor the first control resource set if the communication apparatus is in an operation mode facilitating power-saving.
7. The communication apparatus according to claim 1 , wherein
the first control resource set is distributed in a frequency domain, and
the circuitry, in operation, controls the receiver to perform frequency hopping every first predetermined time interval to monitor the first control resource set.
8. The communication apparatus according to claim 7 , wherein
the second control resource set is distributed in the frequency domain,
the circuitry, in operation, controls the receiver to perform frequency hopping every second predetermined time interval to monitor the second control resource set, and
the hopping pattern for the first control resource set is similar to the hopping pattern for the second control resource set.
9. The communication apparatus according to claim 7 , wherein
the second control resource set is distributed in the frequency domain,
the circuitry, in operation, controls the receiver to perform frequency hopping every second predetermined time interval to monitor the second control resource set, and
the hopping pattern for the first control resource set differs from the hopping pattern for the second control resource set at least in a frequency band in at least one time interval.
10. The communication apparatus according to claim 1 , wherein
the circuitry, in operation, selects the configuration of the first control resource set according to the subcarrier spacing and the bandwidth of the first control resource set which is supported by the communication apparatus.
11. The communication apparatus according to claim 10 , wherein
the parameters included in the configuration of the first control resource set further correspond to a bandwidth capability range of the communication apparatus, and
the circuitry, in operation, selects the configuration of the first control resource set according to the bandwidth capability range.
12. The communication apparatus according to claim 10 , wherein the circuitry, in operation, in case the communication apparatus supports more than one configurations, performs selection of the configuration of the first control resource set as any of:
random selection of one of the supported configurations;
selection of a configuration with a default subcarrier spacing and a default bandwidth of the first control resource set;
selection based on an identifier of the communication apparatus; and
selection based on current channel conditions of the communication apparatus.
13. The communication apparatus according to claim 10 , wherein the parameters included in the configuration of the first control resource set and/or parameters included in the configuration of the second control resource set include a hopping indication specifying whether or not a frequency hopping is applied to the corresponding control resource set.
14. The communication apparatus according to claim 13 , wherein the parameters included in the configuration of the first control resource set and/or the parameters included in the configuration of the second control resource set include a hopping pattern indication when the hopping indication indicates that a frequency hopping is applied.
15. The communication apparatus according to claim 10 , wherein
the configuration of the second control resource set includes a subset of the parameters included in the configuration parameters of the first control resource set, and
the circuitry, in operation, applies the remaining parameters of the parameters included in the configuration of the first control resource set to the second control resource set.
16. The communication apparatus according to claim 1 , wherein the circuitry, in operation, controls the receiver
to monitor the first control resource set and/or the second control resource set, and
to receive within the first control resource set and/or the second control resource set control information indicating a resource allocation for data transmission to the communication apparatus,
wherein the resource allocation indicates a numerology including the subcarrier spacings and a cyclic prefix length.
17. A method for a communication apparatus, comprising the steps of:
receiving at least one entry, included in system information, out of a plurality of entries wherein each of the entries represents a respective candidate for configuration of a first control resource set;
determining, based on the at least one entry, a configuration of the first control resource set, wherein the configuration of the first control resource set includes parameters corresponding to a subcarrier spacing and a bandwidth of the first control resource set;
transmitting a random access message associated with the first control resource set;
monitoring control resources in the first control resource set after transmitting the random access message;
transmitting a communication apparatus capability indication;
after transmitting the communication apparatus capability indication, receiving within the first control resource set an indication of a configuration of a second control resource set; and
monitoring control resources in the first control resource set and/or in the second control resource set after receiving the configuration of the second control resource set.
18. The method according to claim 17 , wherein
the first control resource set is located within a first bandwidth and the second control resource set is located within a second bandwidth,
the first bandwidth is a bandwidth in which any resources allocated by control information carried in the first control resource set are located, and
the second bandwidth is a bandwidth in which any resources allocated by control information carried in the second control resource set are located.
19. The method according to claim 18 , wherein the first bandwidth and the second bandwidth are centered in the frequency domain.
20. The method according to claim 18 , wherein
a bandwidth of the first control resource set is included in a bandwidth of the second control resource set, or
the first control resource set is a subset of the second control resource set.