Methods and apparatus for uplink channel access and transmissions for LTE on unlicensed spectrum
AssigneeSamsung Electronics Co., Ltd.
InventorBoon Loong Ng
Life of this patent
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Abstract
Methods and apparatuses for efficient data transmission in a wireless communication system. A method includes receiving a predefined downlink-uplink (DL-UL) subframe configuration from an eNodeB (eNB), wherein the eNB cooperates with at least one neighbor eNB that belongs to an asynchronous licensed assisted access (LAA) cell operating on at least one LAA carrier. The method further includes performing a listen before talk (LBT) procedure before transmitting UL data in the at least one LAA carrier and transmitting the UL data in accordance with the LBT procedure based on the DL-UL subframe configuration.
Claims20
A user equipment (UE) comprising:
- at least one processor configured to:
- perform a listen before talk (LBT) procedure before transmitting UL data on the at least one licensed assisted access (LAA) carrier;
- and
- a transceiver configured to:
- receive a predefined downlink and uplink (DL-UL) subframe configuration from an eNodeB (eNB), wherein the eNB cooperates with at least one neighbor eNB that belongs to an asynchronous LAA cell operating on the at least one LAA carrier;
- transmit the UL data in accordance with the LBT procedure based on the DL-UL subframe configuration.
An eNodeB (eNB) comprising:
- at least one processor configured to:
- detect at least one neighbor eNB that belongs to an asynchronous licensed assisted access (LAA) cell operating on at least one LAA carrier;
- generate a predefined downlink and uplink (DL-UL) subframe configuration including a guard period, wherein the predefined DL-UL subframe is determined by coordinating between the eNB and the at least one neighbor eNB through an X2 interfaces;
- and
- a transceiver configured to:
- transmit the predefined DL-UL subframe configuration to at least one user equipment (UE);
- and
- receive UL data in accordance with the predefined DL-UL subframe configuration from the at least one UE.
A method for efficient data transmission in a wireless communication system, the method comprises:
- receiving, by a user equipment (UE), a predefined downlink and uplink (DL-UL) subframe configuration from an eNodeB (eNB), wherein the eNB cooperates with at least one neighbor eNB that belongs to an asynchronous licensed assisted access (LAA) cell operating on at least one LAA carrier;
- performing, by the UE, a listen before talk (LBT) procedure before transmitting UL data in the at least one LAA carrier;
- and
- transmitting the UL data in accordance with the LBT procedure based on the DL-UL subframe configuration.
Dependencies are inferred from the claim text.