Method for obtaining quantity of resource elements in communication process and related apparatus
A method for obtaining a quantity of resource elements in a communication process, comprising: determines a downlink control information format of downlink control information, obtains, based on the downlink control information format, a quantity of resource elements occupied by a demodulation reference signal (DMRS); and determines a size of transport block (TBS) based on the quantity of resource elements occupied by the DMRS.
1. A method comprising:
determining a downlink control information (DCI) format of DCI, the DCI scheduling a data transmission;
determining, based on the DCI format and a predefined correspondence, a quantity of resource elements per physical resource block (PRB) of a demodulation reference signal (DMRS), wherein the DCI format is DCI format 0_0 or DCI format 1_0, and the predefined correspondence comprises a correspondence between the DCI format and the quantity of resource elements per PRB of the DMRS; and
determining a transport block size (TBS) used for the data transmission based on the quantity of resource elements that is determined.
2. The method according to claim 1 , wherein the quantity of resource elements is 6, 12, or 24.
3. The method according to claim 1 , wherein the method further comprises:
obtaining a configuration type of the DMRS and a quantity of symbols occupied by the DMRS; and
wherein determining the quantity of resource elements comprises determining the quantity of resource elements based on the DCI format, the configuration type of the DMRS and the quantity of symbols occupied by the DMRS, and wherein the DCI format is DCI format 0_0 or DCI format 1_0, the configuration type of the DMRS is DMRS configuration type 1, the quantity of symbols occupied by the DMRS is 1, and the quantity of resource elements is 6, 12, or 24.
4. The method according to claim 1 , wherein the method further comprises:
obtaining a configuration type of the DMRS, a quantity of symbols occupied by the DMRS, and a quantity of symbols occupied by a transport block; and
wherein determining the quantity of resource elements comprises determining the quantity of resource elements based on the DCI format, the configuration type of the DMRS, the quantity of symbols occupied by the DMRS, and the quantity of symbols occupied by the transport block; and
wherein:
the DCI format is DCI format 0_0 or DCI format 1_0, the configuration type of the DMRS is DMRS configuration type 1, the quantity of symbols occupied by the DMRS is 1, the quantity of symbols occupied by the transport block is greater than or equal to 7, and the quantity of resource elements is 12, 24, or 36; or
the DCI format is DCI format 0_0 or DCI format 1_0, the configuration type of the DMRS is DMRS configuration type 1, the quantity of symbols occupied by the DMRS is 1, the quantity of symbols occupied by the transport block is less than 7, and the quantity of resource elements is 6, 12, or 24.
5. The method according to claim 1 , wherein the method further comprises:
obtaining a configuration type of the DMRS, a quantity of symbols occupied by the DMRS, a quantity of symbols occupied by a transport block, and a position of a symbol occupied by the transport block; and
wherein determining the quantity of resource elements comprises determining the quantity of resource elements based on the DCI format, the configuration type of the DMRS, the quantity of symbols occupied by the DMRS, the quantity of symbols occupied by the transport block, and the position of the symbol occupied by the transport block; and
wherein:
the DCI format is DCI format 0_0 or DCI format 1_0, the configuration type of the DMRS is DMRS configuration type 1, the quantity of symbols occupied by the DMRS is 1, the quantity of symbols occupied by the transport block is greater than or equal to 7, and the quantity of resource elements is 12, 24, or 36; or
the DCI format is DCI format 0_0 or DCI format 1_0, the configuration type of the DMRS is DMRS configuration type 1, the quantity of symbols occupied by the DMRS is 1, the quantity of symbols occupied by the transport block is less than 7, and the quantity of resource elements is 6, 12, or 24.
6. The method according to claim 1 , wherein the method further comprises:
obtaining a configuration type of the DMRS, a quantity of symbols occupied by the DMRS, a quantity of symbols occupied by a transport block, and a quantity of additional DMRSs in the DMRS; and
wherein determining the quantity of resource elements comprises determining the quantity of resource elements based on the DCI format, the configuration type of the DMRS, the quantity of symbols occupied by the DMRS, the quantity of symbols occupied by the transport block, and the quantity of the additional DMRSs, and wherein the DCI format is DCI format 0_0 or DCI format 1_0, the configuration type of the DMRS is DMRS configuration type 1, the quantity of symbols occupied by the DMRS is 1, and the quantity of the additional DMRSs is 0, 1, or 2.
7. The method according to claim 1 , wherein the method further comprises;
obtaining a configuration type of the DMRS, a quantity of symbols occupied by the DMRS, a quantity of symbols occupied by a transport block, a position of a symbol occupied by the transport block, and a quantity of additional DMRSs in the DMRS; and
wherein determining the quantity of resource elements comprises determining the quantity of resource elements based on the DCI format, the configuration type of the DMRS, the quantity of symbols occupied by the DMRS, the quantity of symbols occupied by the transport block, the position of the symbol occupied by the transport block, and the quantity of the additional DMRSs, and wherein the DCI format is DCI format 0_0 or DCI format 1_0, the configuration type of the DMRS is DMRS configuration type 1, the quantity of symbols occupied by the DMRS is 1, and the quantity of the additional DMRSs is 0, 1, or 2.
8. The method according to claim 1 , wherein the method is performed by a terminal device in a wireless mobile communications system, or performed by a chip in the terminal device.
9. An apparatus comprising:
at least one processor, configured to:
determine a downlink control information (DCI) format of DCI, the DCI scheduling a data transmission;
determine, based on the DCI format and a predefined correspondence, a quantity of resource elements per physical resource block (PRB) of a demodulation reference signal (DMRS), wherein the DCI format is DCI format 0_0 or DCI format 1_0, and the predefined correspondence comprises a correspondence between the DCI format and the quantity of resource elements per PRB of the DMRS; and
determine a transport block size (TBS) used for the data transmission based on the quantity of resource elements that is determined.
10. The apparatus according to claim 9 , wherein the quantity of resource elements is 6, 12, or 24.
11. The apparatus according to claim 9 , wherein the at least one processor is further configured to obtain a configuration type of the DMRS and a quantity of symbols occupied by the DMRS, wherein determining the quantity of resource elements comprises determining the quantity of resource elements based on the DCI format, the configuration type of the DMRS and the quantity of symbols occupied by the DMRS, and wherein the DCI format is DCI format 0_0 or DCI format 1_0, the configuration type of the DMRS is DMRS configuration type 1, the quantity of symbols occupied by the DMRS is 1, and the quantity of resource elements is 6, 12, or 24.
12. The apparatus according to claim 9 , wherein the at least one processor is further configured to obtain a configuration type of the DMRS, a quantity of symbols occupied by the DMRS, and a quantity of symbols occupied by a transport block; and
wherein determining the quantity of resource elements comprises determining the quantity of resource elements based on the DCI format, the configuration type of the DMRS, the quantity of symbols occupied by the DMRS, and the quantity of symbols occupied by the transport block; and
wherein:
the DCI format is DCI format 0_0 or DCI format 1_0, the configuration type of the DMRS is DMRS configuration type 1, the quantity of symbols occupied by the DMRS is 1, the quantity of symbols occupied by the transport block is greater than or equal to 7, and the quantity of resource elements is 12, 24, or 36; or
the DCI format is DCI format 0_0 or DCI format 1_0, the configuration type of the DMRS is DMRS configuration type 1, the quantity of symbols occupied by the DMRS is obtained as 1, the quantity of symbols occupied by the transport block is less than 7, and the quantity of resource elements is 6, 12, or 24.
13. The apparatus according to claim 9 , wherein the at least one processor is further configured to obtain a configuration type of the DMRS, a quantity of symbols occupied by the DMRS, a quantity of symbols occupied by a transport block, and a position of a symbol occupied by the transport block; and
wherein determining the quantity of resource elements comprises determining the quantity of resource elements based on the DCI format, the configuration type of the DMRS, the quantity of symbols occupied by the DMRS, the quantity of symbols occupied by the transport block, and the position of the symbol occupied by the transport block; and
wherein:
the DCI format is DCI format 0_0 or DCI format 1_0, the configuration type of the DMRS is DMRS configuration type 1, the quantity of symbols occupied by the DMRS is 1, the quantity of symbols occupied by the transport block is greater than or equal to 7, and the quantity of resource elements is 12, 24, or 36; or
the DCI format is DCI format 0_0 or DCI format 1_0, the configuration type of the DMRS is DMRS configuration type 1, the quantity of symbols occupied by the DMRS is 1, the quantity of symbols occupied by the transport block is less than 7, and the quantity of resource elements is 6, 12, or 24.
14. The apparatus according to claim 9 , wherein the at least one processor is further configured to obtain a configuration type of the DMRS, a quantity of symbols occupied by the DMRS, a quantity of symbols occupied by a transport block, and a quantity of additional DMRSs in the DMRS; and
wherein determining the quantity of resource elements comprises determining the quantity of resource elements based on the DCI format, the configuration type of the DMRS, the quantity of symbols occupied by the DMRS, the quantity of symbols occupied by the transport block, and the quantity of the additional DMRSs, and wherein the DCI format is DCI format 0_0 or DCI format 1_0, the configuration type of the DMRS is DMRS configuration type 1, the quantity of symbols occupied by the DMRS is 1, and the quantity of the additional DMRSs is 0, 1, or 2.
15. The apparatus according to claim 9 , wherein the at least one processor is further configured to obtain a configuration type of the DMRS, a quantity of symbols occupied by the DMRS, a quantity of symbols occupied by a transport block, a position of a symbol occupied by the transport block, and a quantity of additional DMRSs; and wherein determining the quantity of resource elements comprises determining the quantity of resource elements based on the DCI format, the configuration type of the DMRS, the quantity of symbols occupied by the DMRS, the quantity of symbols occupied by the transport block, the position of the symbol occupied by the transport block, and the quantity of the additional DMRSs, and wherein the DCI format is DCI format 0_0 or DCI format 1_0, the configuration type of the DMRS is DMRS configuration type 1, the quantity of symbols occupied by the DMRS is 1, and the quantity of the additional DMRSs is 0, 1, or 2.
16. The apparatus according to claim 9 , wherein the apparatus is a terminal device in a wireless mobile communications system or a chip in the terminal device.
17. A non-transitory computer-readable media storing computer instructions, that when executed by one or more processors, cause the one or more processors to perform steps of:
determining a downlink control information (DCI) format of DCI, the DCI scheduling a data transmission;
determining, based on the DCI format and a predefined correspondence, a quantity of resource elements per physical resource block (PRB) of a demodulation reference signal (DMRS), wherein the DCI format is DCI format 00 or DCI format 10, and the predefined correspondence comprises a correspondence between the DCI format and the quantity of resource elements per PRB of the DMRS; and
determining a transport block size (TBS) used for the data transmission based on the quantity of resource elements that is determined.
18. The non-transitory computer-readable media according to claim 17 , wherein the quantity of resource elements is 6, 12, or 24.
19. The non-transitory computer-readable media according to claim 17 , wherein the steps further comprise:
obtaining a configuration type of the DMRS and a quantity of symbols occupied by the DMRS; and
wherein determining the quantity of resource elements comprises determining the quantity of resource elements based on the DCI format, the configuration type of the DMRS and the quantity of symbols occupied by the DMRS, and wherein the DCI format is DCI format 0_0 or DCI format 1_0, the configuration type of the DMRS is DMRS configuration type 1, the quantity of symbols occupied by the DMRS is 1, and the quantity of resource elements is 6, 12, or 24.
20. The non-transitory computer-readable media according to claim 17 , wherein the steps further comprise:
obtaining a configuration type of the DMRS, a quantity of symbols occupied by the DMRS, and a quantity of symbols occupied by a transport block of the data transmission;
wherein determining the quantity of resource elements comprises determining the quantity of resource elements based on the DCI format, the configuration type of the DMRS, the quantity of symbols occupied by the DMRS, and the quantity of symbols occupied by the transport block; and
wherein:
the DCI format is DCI format 0_0 or DCI format 1_0, the configuration type of the DMRS is DMRS configuration type 1, the quantity of symbols occupied by the DMRS is 1, the quantity of symbols occupied by the transport block is greater than or equal to 7, and the quantity of resource elements is 12, 24, or 36; or
the DCI format is DCI format 0_0 or DCI format 1_0, the configuration type of the DMRS is DMRS configuration type 1, the quantity of symbols occupied by the DMRS is 1, the quantity of symbols occupied by the transport block is less than 7, and the quantity of resource elements is 6, 12, or 24.
21. The non-transitory computer-readable media according to claim 17 , wherein the steps further comprise:
obtaining a configuration type of the DMRS, a quantity of symbols occupied by the DMRS, a quantity of symbols occupied by a transport block, and a position of a symbol occupied by the transport block; and
wherein determining the quantity of resource elements comprises determining the quantity of resource elements based on the DCI format, the configuration type of the DMRS, the quantity of symbols occupied by the DMRS, the quantity of symbols occupied by the transport block, and the position of the symbol occupied by the transport block; and
wherein:
the DCI format is DCI format 0_0 or DCI format 1_0, the configuration type of the DMRS is DMRS configuration type 1, the quantity of symbols occupied by the DMRS is 1, the quantity of symbols occupied by the transport block is greater than or equal to 7, and the quantity of resource elements is 12, 24, or 36; or
the DCI format is DCI format 0_0 or DCI format 1_0, the configuration type of the DMRS is DMRS configuration type 1, the quantity of symbols occupied by the DMRS is 1, the quantity of symbols occupied by the transport block is less than 7, and the quantity of resource elements is 6, 12, or 24.
22. The non-transitory computer-readable media according to claim 17 , wherein the steps further comprise:
obtaining a configuration type of the DMRS, a quantity of symbols occupied by the DMRS, a quantity of symbols occupied by a transport block of the data transmission, and a quantity of additional DMRSs in the DMRS; and
wherein determining the quantity of resource elements comprises determining the quantity of resource elements based on the DCI format, the configuration type of the DMRS, the quantity of symbols occupied by the DMRS, the quantity of symbols occupied by the transport block, and the quantity of the additional DMRSs, and wherein the DCI format is DCI format 0_0 or DCI format 1_0, the configuration type of the DMRS is DMRS configuration type 1, the quantity of symbols occupied by the DMRS is 1, and the quantity of the additional DMRSs is 0, 1, or 2.
23. The non-transitory computer-readable media according to claim 17 , wherein the steps further comprise:
obtaining a configuration type of the DMRS, a quantity of symbols occupied by the DMRS, a quantity of symbols occupied by a transport block, a position of a symbol occupied by the transport block, and a quantity of additional DMRSs in the DMRS; and
wherein determining the quantity of resource elements comprises determining the quantity of resource elements based on the DCI format, the configuration type of the DMRS, the quantity of symbols occupied by the DMRS, the quantity of symbols occupied by the transport block, the position of the symbol occupied by the transport block, and the quantity of the additional DMRSs, and wherein the DCI format is DCI format 0_0 or DCI format 1_0, the configuration type of the DMRS is DMRS configuration type 1, the quantity of symbols occupied by the DMRS is 1, and the quantity of the additional DMRSs is 0, 1, or 2.
24. The non-transitory computer-readable media according to claim 17 , wherein the steps are performed by a terminal device in a wireless mobile communications system, or performed by a chip in the terminal device.