Resource mapping method and apparatus

1. A resource mapping method, comprising:

obtaining a modulation symbol, wherein the modulation symbol is generated based on M code words, and M is a positive integer greater than or equal to 1;

determining a mapping pattern from one or more mapping patterns to map the modulation symbol to a time-frequency resource, based on each of the M code words or a user identification (ID) associated with a user equipment;

mapping the modulation symbol to the time-frequency resource according to the determined mapping pattern; wherein

the one or more mapping patterns include:

(a) a pattern of mapping every Q modulation symbols to one mapping unit, the mapping unit comprises F resource units, F is a positive integer greater than or equal to 1, and Q is a positive integer meeting 1≤Q≤F; and

(b) a sparse mapping pattern, and the sparse mapping pattern is a mapping pattern meeting F≥2 and 1≤Q<F.

2. The method according to claim 1 , further comprising:

sending signaling that indicates the one or more mapping patterns, or receiving signaling that indicates the one or more mapping patterns.

3. The method according to claim 1 , comprising

sending a pilot, wherein the pilot indicates the one or more mapping patterns.

4. The method according to claim 1 , further comprising:

determining a transport block size of each of the M code words, wherein the transport block size is determined based on a mapping pattern.

5. The method according to any one of claim 1 , wherein that the transport block size is determined based on a mapping pattern is specifically: the transport block size is determined based on symbol sparsity of the mapping pattern, wherein the symbol sparsity of the mapping pattern is a ratio of Q to F; or

the Q modulation symbols are from R different bits or R different bit groups, wherein R is a positive integer meeting 1≤R<Q, and that the transport block size is determined based on a mapping pattern is specifically: the transport block size is determined based on bit sparsity of the mapping pattern, wherein the bit sparsity of the mapping pattern is a ratio of R to F.

6. An apparatus, comprising a processor and a transceiver, wherein

the processor is configured to: obtain a modulation symbol, wherein the modulation symbol is generated based on M code words, and M is a positive integer greater than or equal to 1;

determine a mapping pattern from one or more mapping patterns to map the modulation symbol to a time-frequency resource, based on each of the M code words or a user identification (ID) associated with a user equipment;

map the modulation symbol to the time-frequency resource according to the determined mapping pattern; wherein

the one or more mapping patterns include:

(a) a pattern of mapping every Q modulation symbols to one mapping unit, the mapping unit comprises F resource units, F is a positive integer greater than or equal to 1, and Q is a positive integer meeting 1≤Q≤F; and

(b) a sparse mapping pattern, and the sparse mapping pattern is a mapping pattern meeting F≥2 and 1≤Q<F.

7. The apparatus according to claim 6 , wherein the transceiver is configured to:

send signaling that indicates the one or more mapping patterns, or receive signaling that indicates the one or more mapping patterns.

8. The apparatus according to claim 6 , wherein the transceiver is further configured to:

send a pilot, wherein the pilot indicates the one or more mapping patterns.

9. The apparatus according to claim 6 , wherein the processor is further configured to:

determine a transport block size of each of the M code words, wherein the transport block size is determined based on a mapping pattern.

10. The apparatus according to claim 9 , wherein the processor is specifically configured to determine the transport block size based on symbol sparsity of the mapping pattern, wherein the symbol sparsity of the mapping pattern is a ratio of Q to F; or

the Q modulation symbols are from R different bits or R different bit groups, wherein R is a positive integer meeting 1≤R<Q, and the processor is specifically configured to determine the transport block size based on bit sparsity of the mapping pattern, wherein the bit sparsity of the mapping pattern is a ratio of R to F.

11. An apparatus, comprising a processor and a transceiver, wherein

the processor is configured to:

obtain receiving symbols; and

demodulate, from the obtained receiving symbols, a modulation symbol generated based on M code words, wherein M is a positive integer greater than or equal to 1; wherein

the modulation symbol generated based on the M code words is mapped to a time-frequency resource according to a mapping pattern, wherein the mapping pattern is determined from one or more mapping patterns based on each of the M code words or a user identification (ID) associated with a user equipment; and wherein the one or more mapping patterns include:

(a) a pattern of mapping Q modulation symbols to a mapping unit, the mapping unit comprises F resource units, and Q and F are positive integers greater than or equal to 1; and

(b) a sparse mapping pattern, and the sparse mapping pattern is a mapping pattern meeting F≥2 and 1≤Q<F.

12. The apparatus according to claim 11 , wherein in a process of demodulating, from the obtained receiving symbols, the modulation symbol generated based on the M code words, the processor is specifically configured to:

determine a time-frequency resource related to a to-be-demodulated receiving symbol, and obtain the to-be-demodulated receiving symbol based on the determined time-frequency resource; and

demodulate the to-be-demodulated receiving symbol based on the one or more mapping patterns.

13. The apparatus according to claim 11 , wherein in a process of demodulating, from the obtained receiving symbols, the modulation symbol generated based on the M code words, the processor is specifically configured to:

determine, based on the one or more mapping patterns, a time-frequency resource location corresponding to the modulation symbol generated based on the M code words; and

demodulate, from the obtained receiving symbols based on the determined time-frequency resource location, the modulation symbol generated based on the M code words.

14. The apparatus according to claim 11 , wherein the transceiver is configured to:

send signaling that indicates the one or more mapping patterns, or receive signaling that indicates the one or more mapping patterns.

15. The apparatus according to claim 11 , wherein the transceiver is configured to:

receive a pilot, wherein the pilot indicates the one or more mapping patterns.