Method for uplink data transmission, terminal, and wireless communication node
First Claim
1. A method for uplink data transmission in a wireless communication system including a first wireless communication node and a second wireless communication node both serve a terminal, wherein the first wireless communication node is a downlink serving node of the terminal, and the second wireless communication node is an uplink serving node of the terminal, the method comprising:
- determining, by the first wireless communication node, whether the terminal is within downlink coverage of the second wireless communication node; and
when the first wireless communication node determines that the terminal is not within the downlink coverage of the second wireless communication node;
instructing, by the first wireless communication node, the terminal to use a non-feedback mode in which the terminal does not retransmit to the second wireless communication node, uplink data that has been sent; and
/orinstructing, by the first wireless communication node, the second wireless communication node to use a non-feedback mode in which the second wireless communication node does not receive, on a time-frequency resource allocated to the terminal, uplink data retransmitted from the terminal,wherein the determining, by the first wireless communication node, whether the terminal is within downlink coverage of the second wireless communication node comprises;
receiving, by the first wireless communication node, a measurement report of the terminal for a downlink reference signal of at least one cell, wherein the measurement report comprises an identifier of the at least one cell;
determining, by the first wireless communication node, whether the identifier of the at least one cell comprises an identifier of a cell served by the second wireless communication node; and
if the identifier of the at least one cell does not comprise the identifier of the cell served by the second wireless communication node, determining, by the first wireless communication node, that the terminal is not within the downlink coverage of the second wireless communication node.
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Accused Products
Abstract
Embodiments of the present invention relate to the communications field, and disclose a method for uplink data transmission, a terminal, and a wireless communication node, which can ensure that a HARQ mechanism between a terminal and a wireless communication node works normally. The method includes: determining, by a first wireless communication node, whether a terminal is within downlink coverage of a second wireless communication node; and when the first wireless communication node determines that the terminal is not within the downlink coverage of the second wireless communication node, instructing, by the first wireless communication node, the terminal to use a non-feedback mode; and/or instructing, by the first wireless communication node, the second wireless communication node to use a non-feedback mode.
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Citations
11 Claims
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1. A method for uplink data transmission in a wireless communication system including a first wireless communication node and a second wireless communication node both serve a terminal, wherein the first wireless communication node is a downlink serving node of the terminal, and the second wireless communication node is an uplink serving node of the terminal, the method comprising:
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determining, by the first wireless communication node, whether the terminal is within downlink coverage of the second wireless communication node; and when the first wireless communication node determines that the terminal is not within the downlink coverage of the second wireless communication node; instructing, by the first wireless communication node, the terminal to use a non-feedback mode in which the terminal does not retransmit to the second wireless communication node, uplink data that has been sent; and
/orinstructing, by the first wireless communication node, the second wireless communication node to use a non-feedback mode in which the second wireless communication node does not receive, on a time-frequency resource allocated to the terminal, uplink data retransmitted from the terminal, wherein the determining, by the first wireless communication node, whether the terminal is within downlink coverage of the second wireless communication node comprises; receiving, by the first wireless communication node, a measurement report of the terminal for a downlink reference signal of at least one cell, wherein the measurement report comprises an identifier of the at least one cell; determining, by the first wireless communication node, whether the identifier of the at least one cell comprises an identifier of a cell served by the second wireless communication node; and if the identifier of the at least one cell does not comprise the identifier of the cell served by the second wireless communication node, determining, by the first wireless communication node, that the terminal is not within the downlink coverage of the second wireless communication node. - View Dependent Claims (2)
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3. A wireless communication node in a wireless communication system including a first wireless communication node and a second wireless communication node both serve a terminal, wherein the wireless communication node is the first wireless communication node that is a downlink serving node of the terminal, and the second wireless communication node is an uplink serving node of the terminal, wherein the wireless communication node comprises:
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a processor configured to determine whether the terminal is within downlink coverage of the second wireless communication node; and a transmitter coupled to the processor and configured to;
when the processor determines that the terminal is not within the downlink coverage of the second wireless communication node, transmit a message instructing the terminal to use a non-feedback mode in which the terminal does not retransmit to the second wireless communication node, uplink data that has been sent; and
/or transmit a message instructing the second wireless communication node to use a non-feedback mode in which the second wireless communication node does not receive, on a time-frequency resource allocated to the terminal, uplink data retransmitted from the terminal,wherein the processor is further configured to; receive a measurement report of the terminal for a downlink reference signal of a cell served by the second wireless communication node, wherein the measurement report comprises a reference signal measurement result of the downlink reference signal of the cell served by the second wireless communication node; and if the reference signal measurement result of the downlink reference signal is not greater than a preset threshold, determine that the terminal is not within the downlink coverage of the second wireless communication node. - View Dependent Claims (4)
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5. A terminal served by a first wireless communication node which is a downlink serving node of the terminal and a second wireless communication node which is an uplink serving node of the terminal, wherein the terminal comprises:
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a processor; and a transmitter, wherein the processor is configured to determine use a non-feedback mode in which the terminal does not retransmit to the second wireless communication node uplink data that has been sent, when the terminal is not within the downlink coverage of the second wireless communication node; and the transmitter is configured to transmit uplink data to the second wireless communication node in the non-feedback mode, wherein the transmitter is further configured to transmit a measurement report for a downlink reference signal of at least one cell to the first wireless communication node, wherein the measurement report is used to determine whether the terminal is within the downlink coverage of the second wireless communication node, wherein the terminal further comprises a receiver configured to;
receive instruction information used to instruct the terminal to use the non-feedback mode from the first wireless communication node when the first wireless communication node determines the terminal is not within the downlink coverage of the second wireless communication node based on that the measurement report does not comprise an identifier of a cell served by the second wireless communication node;wherein the processor is configured to determine to use the non-feedback mode when the receiver receives the instruction information. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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Specification