Method and device for transmitting data
First Claim
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1. A data transmission method, comprising:
- determining by a terminal device a target contention transmission unit (CTU) from a plurality of candidate CTUs according to a first partial identifier in a terminal device identifier, wherein the terminal device identifier comprises the first partial identifier and a second partial identifier; and
sending by the terminal device an uplink data packet to a network device by using the target CTU, wherein the uplink data packet carries the second partial identifier;
wherein determining the target CTU from the plurality of candidate CTUs according to the first partial identifier in the terminal device identifier comprises;
determining by the terminal device a target CTU group from a plurality of candidate CTU groups according to the first partial identifier, wherein each of the plurality of candidate CTU groups comprises at least one of the plurality of candidate CTUs,wherein determining the target CTU group from the plurality of candidate CTU groups comprises;
generating by the terminal device a binary pseudo-random sequence according to a number of contention access period in which the plurality of candidate CTU groups belong, wherein a length of the binary pseudo-random sequence is the same as a length of the first partial identifier,performing by the terminal device a reversible operation on the binary pseudo-random sequence and the first partial identifier to obtain a first binary sequence, anddetermining by the terminal device the target CTU group from the plurality of candidate CTU groups according to the first binary sequence.
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Abstract
The invention discloses a data transmission method and apparatus. The method determines a target CTU from multiple candidate CTUs according to a first partial identifier in a terminal device identifier, where the terminal device identifier includes the first partial identifier and a second partial identifier. The method sends an uplink data packet to a network device by using the target CTU, where the uplink data packet carries the second partial identifier. According to the data transmission method and apparatus disclosed, the first partial identifier in the terminal device identifier can be implicitly indicated to reduce signaling overheads of a system.
6 Citations
16 Claims
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1. A data transmission method, comprising:
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determining by a terminal device a target contention transmission unit (CTU) from a plurality of candidate CTUs according to a first partial identifier in a terminal device identifier, wherein the terminal device identifier comprises the first partial identifier and a second partial identifier; and sending by the terminal device an uplink data packet to a network device by using the target CTU, wherein the uplink data packet carries the second partial identifier; wherein determining the target CTU from the plurality of candidate CTUs according to the first partial identifier in the terminal device identifier comprises; determining by the terminal device a target CTU group from a plurality of candidate CTU groups according to the first partial identifier, wherein each of the plurality of candidate CTU groups comprises at least one of the plurality of candidate CTUs, wherein determining the target CTU group from the plurality of candidate CTU groups comprises; generating by the terminal device a binary pseudo-random sequence according to a number of contention access period in which the plurality of candidate CTU groups belong, wherein a length of the binary pseudo-random sequence is the same as a length of the first partial identifier, performing by the terminal device a reversible operation on the binary pseudo-random sequence and the first partial identifier to obtain a first binary sequence, and determining by the terminal device the target CTU group from the plurality of candidate CTU groups according to the first binary sequence. - View Dependent Claims (2, 3, 4)
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5. A data transmission method, comprising:
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receiving by a network device an uplink data packet transmitted by a terminal device by using a target contention transmission unit (CTU), wherein the uplink data packet carries a second partial identifier in a terminal device identifier of the terminal device; determining by the network device a first partial identifier in the terminal device identifier according to the target CTU, wherein the terminal device identifier comprises the first partial identifier and the second partial identifier; and determining by the network device the terminal device identifier of the terminal device according to the first partial identifier and the second partial identifier by; generating by the network device a binary random sequence with a length of M according to a number of contention access period in which the target CTU belongs, wherein the binary random sequence comprises N reference bits with a value of 1, and inserting by the network device the first partial identifier into the second partial identifier to obtain the terminal device identifier, so that positions of N bits in the first partial identifier in the terminal device identifier are in a one-to-one correspondence with positions of the N reference bits in the binary random sequence. - View Dependent Claims (6, 7, 8)
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9. A data transmission apparatus, comprising:
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a processor configured to determine a target contention transmission unit (CTU) from a plurality of candidate CTUs according to a first partial identifier in a terminal device identifier, wherein the terminal device identifier comprises the first partial identifier and a second partial identifier, and to determine a target CTU group from a plurality of candidate CTU groups according to the first partial identifier, wherein each of the plurality of candidate CTU groups comprises at least one of the plurality of candidate CTUs; and a transmitter configured to send an uplink data packet to a network device by using the target CTU determined by the determining unit, wherein the uplink data packet carries the second partial identifier; wherein to determine the target CTU group from the plurality of candidate CTU groups, the processor is further configured to; generate a binary pseudo-random sequence according to a number of contention access period in which the plurality of candidate CTU groups belong, wherein a length of the binary pseudo-random sequence is the same as a length of the first partial identifier, perform a reversible operation on the binary pseudo-random sequence and the first partial identifier to obtain a first binary sequence, and determine the target CTU group from the plurality of candidate CTU groups according to the first binary sequence. - View Dependent Claims (10, 11, 12)
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13. A data transmission apparatus, comprising:
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a receiver configured to receive an uplink data packet transmitted by a terminal device by using a target contention transmission unit (CTU), wherein the uplink data packet carries a second partial identifier in a terminal device identifier of the terminal device; and a processor configured to; determine a first partial identifier in the terminal device identifier according to the target CTU, wherein the terminal device identifier comprises the first partial identifier and the second partial identifier, and determine the terminal device identifier of the terminal device according to the first partial identifier determined by the first determining unit and the second partial identifier by; generating a binary random sequence with a length of M according to a number of contention access period in which the target CTU belongs, wherein the binary random sequence comprises N reference bits with a value of 1, and inserting the first partial identifier into the second partial identifier to obtain the terminal device identifier, so that positions of N bits in the first partial identifier in the terminal device identifier are in a one-to-one correspondence with positions of the N reference bits in the binary random sequence. - View Dependent Claims (14, 15, 16)
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Specification