Methods, base station and user equipment

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.

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.

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.