Methods, base station and user equipment

1. A method performed by a base station in a Radio Access Network (RAN), the method comprising:

mapping a first Transmission Time Interval (TTI) configuration associated with a carrier of the RAN to a first subband of the carrier, wherein the first subband is configured to support a first Quality of Service (QoS) requirement, wherein the first TTI configuration comprises a first number of Orthogonal Frequency-Division Multiplexing (OFDM) symbols, and wherein the first subband has a first resource pool for a first Downlink Control Information (DCI);

mapping a second TTI configuration associated with the carrier to a second subband of the carrier, wherein the second subband is configured to support a second QoS requirement different from the first QoS requirement, wherein the second TTI configuration comprises a second number of the OFDM symbols, wherein the second TTI configuration is different from the first TTI configuration, and wherein the second subband has a second resource pool for a second DCI, in which the second DCI and the second resource pool are separate from the first DCI and the first resource pool;

wherein the OFDM symbols with respect to the first and the second subbands are defined according to one numerology; and

informing a user equipment (UE) of the first and second TTI configurations and search spaces for the first and second DCIs mapped respectively to the first and second subbands.

2. The method according to claim 1 , wherein the first and the second TTI configurations correspond to at least one of: a type of the UE, the first and second QoS requirements, and a type of a service.

3. The method according to claim 1 , wherein the informing is performed by using a Downlink Control Information (CDI) message.

4. The method according to claim 1 , wherein the method further comprises:

mapping a first number of subcarriers to the first subband; and

mapping a second number of subcarriers to the second subband.

5. The method according to claim 1 , wherein the first and the second TTI configurations comprise:

a TTI length based on the number of OFDM symbols therein; or

the TTI length and any one of: a Downlink Control Information (DCI) search space; a DCI format; a Uplink Control Information (UCI) search space; a UCI format; a channel state information (CSI) measurement; a CSI measurement report; a Status Report (SR); and a buffer status report.

6. A method performed by a user equipment (UE) for accessing a Radio Access Network (RAN), the method comprising:

receiving a first and a second Transmission Time Interval (TTI) configurations, a search space for a first Downlink Control Information (DCI) and a search space for a second DCI, the first and second TTIs and the first and second DCIs mapped respectively to a first subband and a second subband of a carrier of the RAN;

wherein the first subband is configured to support a first Quality of Service (QoS) requirement, and the second subband is configured to support a second QoS requirement different from the first QoS requirement;

wherein the first TTI configuration comprises a first number of Orthogonal Frequency-Division Multiplexing (OFDM) symbols and wherein the first subband has a first resource pool for the first DCI;

wherein the second TTI configuration comprises a second number of OFDM symbols, wherein the second TTI configuration is different from the first TTI configuration, and wherein the second subband has a second resource pool for the second DCI, in which the second DCI and the second resource pool are separate from the first DCI and the first resource pool; and

wherein the OFDM symbols with respect to the first and the second subbands are defined according to one numerology.

7. The method according to claim 6 , wherein the first and the second TTI configurations correspond to at least one of: a type of the UE, the first and second QoS requirements, and a type of a service.

8. The method according to claim 6 , wherein the receiving is performed by using a Downlink Control Information (DCI) message.

9. The method according to claim 6 , wherein the method further comprises:

receiving an indication of the first subband, the first subband including a first number of subcarriers; and

receiving an indication of the second subband, the second subband including a second number of the subcarriers.

10. The method according to claim 6 , wherein the first and the second TTI configurations comprise:

a TTI length based on the number of OFDM symbols therein; or

the TTI length and any one of: a Downlink Control Information (DCI) search space; a DCI format; a Uplink Control Information (UCI) search space; a UCI format; a channel state information (CSI) measurement; a CSI measurement report; a Status Report (SR); and a buffer status report.

11. A base station operable in a Radio Access Network (RAN), the base station comprising:

a processor;

a memory coupled to the processor, the memory containing instructions which, when executed by the processor, cause the base station to:

map a first Transmission Time Interval (TTI) configuration associated with a carrier of the RAN to a first subband of the carrier, wherein the first subband is configured to support a first Quality of Service (QoS) requirement, wherein the first TTI configuration comprises a first number of Orthogonal Frequency-Division Multiplexing (OFDM) symbols, and wherein the first subband has a first resource pool for a first Downlink Control Information (DCI);

map a second TTI configuration associated with the carrier to a second subband, wherein the second subband is configured to support a second QoS requirement different from the first QoS requirement, wherein the second TTI configuration comprises a second number of the OFDM symbols, wherein the second TTI configuration is different from the first TTI configuration, and wherein the second subband has a second resource pool for a second DCI, in which the second DCI and the second resource pool are separate from the first DCI and the first resource pool;

wherein the OFDM symbols with respect to the first and the second subbands are defined according to one numerology; and

inform a user equipment (UE) of the first and second TTI configurations and search spaces for the first and second DCIs mapped respectively to the first and second subbands.

12. The base station according to claim 11 , wherein the instructions further cause the base station to:

map a first number of subcarriers to the first subband; and

map a second number of subcarriers to the second subband.

13. A user equipment (UE) for accessing to a Radio Access Network (RAN), comprising:

a processor; and

a memory coupled to the processor, the memory containing instructions which, when executed by the processor, cause the UE to:

receive a first and a second Transmission Time Interval (TTI) configurations, a search space for a first Downlink Control Information (DCI) and a search space for a second DCI, the first and second TTIs and the first and second DCIs mapped respectively to a first subband and a second subband of a carrier of the RAN;

wherein the first subband is configured to support a first Quality of Service (QoS) requirement, and the second subband is configured to support a second QoS requirement different from the first QoS requirement;

wherein the first TTI configuration comprises a first number of Orthogonal Frequency-Division Multiplexing (OFDM) symbols and wherein the first subband has a first resource pool for the first DCI;

wherein the second TTI configuration comprises a second number of OFDM symbols, wherein the second TTI configuration is different from the first TTI configuration, and wherein the second subband has a second resource pool for the second DCI, in which the second DCI and the second resource pool are separate from the first DCI and the first resource pool; and

wherein the OFDM symbols with respect to the first and the second subbands are defined according to one numerology.

14. The UE according to claim 13 , wherein the instructions further cause the UE to:

receive an indication of the first subband, the first subband including a first number of subcarriers; and

receive an indication of the second subband, the second subband including a second number of the subcarriers.