Pilot sequence transmission method and apparatus
First Claim
1. A pilot sequence transmission method, comprising:
- determining a first pilot sequence to indicate whether a terminal device is in an active state;
determining a second pilot sequence for uplink data demodulation;
mapping the first pilot sequence to a first orthogonal frequency division multiplexing (OFDM) symbol of a grant free transmission resource;
mapping the second pilot sequence to a second OFDM symbol of the grant free transmission resource; and
sending the first pilot sequence and the second pilot sequence based on the first OFDM symbol and the second OFDM symbol.
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Accused Products
Abstract
The present invention discloses a pilot sequence transmission method and apparatus. A terminal device determines a first pilot number, determines a first pilot sequence and a second pilot sequence according to the first pilot number, respectively maps the first pilot sequence and the second pilot sequence to a first OFDM symbol and a second OFDM symbol of a grant free transmission resource, and sends the first pilot sequence and the second pilot sequence by using the first OFDM symbol and the second OFDM symbol. Therefore, a network device can determine activeness of the terminal device by detecting the first pilot sequence, and can detect only the second pilot sequence corresponding to the first pilot sequence, and does not need to detect all possible second pilot sequences, so that a quantity of detected pilots can be significantly reduced, and pilot detection complexity is reduced.
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Citations
22 Claims
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1. A pilot sequence transmission method, comprising:
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determining a first pilot sequence to indicate whether a terminal device is in an active state; determining a second pilot sequence for uplink data demodulation; mapping the first pilot sequence to a first orthogonal frequency division multiplexing (OFDM) symbol of a grant free transmission resource; mapping the second pilot sequence to a second OFDM symbol of the grant free transmission resource; and sending the first pilot sequence and the second pilot sequence based on the first OFDM symbol and the second OFDM symbol. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A pilot sequence transmission apparatus, comprising:
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a processor, wherein the processor is configured to execute instructions, wherein the instructions cause the processor to; determine a first pilot sequence to indicate whether a terminal device is in an active state; determine a second pilot sequence for uplink data demodulation; map the first pilot sequence to a first orthogonal frequency division multiplexing (OFDM) symbol of a grant free transmission resource; and map the second pilot sequence to a second OFDM symbol of the grant free transmission resource. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification