METHOD AND APPARATUS FOR COMMUNICATIONS WITH CARRIER AGGREGATION
First Claim
1. A method at a base station for performing data transmission to a user equipment in a communications system supporting carrier aggregation of at least one first carrier on which a short Transmission Time Interval, TTI is applied and at least one second carrier on which a long TTI is applied, the method comprising:
- transmitting at least one downlink scheduling grant corresponding to data transmission to the user equipment in a downlink control region of at least one of a short TTI on a first carrier and a long TTI on a second carrier; and
performing downlink data transmission towards the user equipment in a data transmission region of a short TTI on the first carrier and in the data transmission region of a long TTI on the second carrier as indicated by the at least one downlink scheduling grant.
1 Assignment
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Accused Products
Abstract
Embodiments of the present disclosure provide a method at a base station for performing data transmission to a user equipment in a communications system supporting carrier aggregation of at least one first carrier on which a short TTI is applied and at least one second carrier on which a long TTI is applied. The method comprises transmitting at least one DL scheduling grant corresponding to data transmission to the user equipment in a DL control region of at least one of a short TTI on a first carrier and a long TTI on a second carrier and performing DL data transmission towards the user equipment in a data transmission region of a short TTI on the first carrier and in the data transmission region of a long TTI on the second carrier as indicated by the at least one DL scheduling grant. There are also provided a method for performing data transmission at a user equipment and a method for transmitting HARQ feedback at a base station or a user equipment.
6 Citations
17 Claims
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1. A method at a base station for performing data transmission to a user equipment in a communications system supporting carrier aggregation of at least one first carrier on which a short Transmission Time Interval, TTI is applied and at least one second carrier on which a long TTI is applied, the method comprising:
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transmitting at least one downlink scheduling grant corresponding to data transmission to the user equipment in a downlink control region of at least one of a short TTI on a first carrier and a long TTI on a second carrier; and performing downlink data transmission towards the user equipment in a data transmission region of a short TTI on the first carrier and in the data transmission region of a long TTI on the second carrier as indicated by the at least one downlink scheduling grant. - View Dependent Claims (2, 3, 4)
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5. A method at a user equipment for transmitting Hybrid Automatic Repeat reQuest, HARQ feedback to a base station in a communications system supporting carrier aggregation of at least one first carrier on which a short Transmission Time Interval, TTI, is applied and at least one second carrier on which a long TTI is applied, the method comprising:
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receiving downlink data transmission from the base station in a data transmission region of a short TTI on a first carrier and in the data transmission region of a long TTI on a second carrier; and transmitting HARQ feedback for the received downlink data transmission towards the base station in an uplink control region of at least one of a short TTI on the first carrier and a long TTI on the second carrier. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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13. A method at a user equipment for performing data transmission to a base station in a communications system supporting carrier aggregation of at least one first carrier on which a short Transmission Time Interval, TTI is applied and at least one second carrier on which a long TTI is applied, the method comprising:
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receiving at least one uplink scheduling grant for data transmission to the base station in a downlink control region of at least one of a short TTI on a first carrier and a long TTI on a second carrier; and performing uplink data transmission towards the base station in a data transmission region of a short TTI on the first carrier and in the data transmission region of a long TTI on the second carrier as indicated by the at least one uplink scheduling grant. - View Dependent Claims (14, 15, 16)
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17-25. -25. (canceled)
Specification