Abstract
The disclosure pertains to selecting a Transport Block Size (TBS) in a communication system. An aspect is directed to an apparatus for selecting a Transport Block Size (TBS) for a transmitter of a communication system. The communication system supports variable Transmission Time Interval (TTI) lengths regarding the number of symbols to be transmitted in one TTI. The apparatus is configured to receive first information indicative of a TTI length, receive second information indicative of a number of reference symbols included in the TTI, decode, from the first information, the TTI length, and decode, from the second information, the number of reference symbols included in the TTI. The apparatus is further configured to calculate, based on the TTI length and based on the number of reference symbols included in the TTI, a number of data symbols included in the TTI, calculate, based on an allocation bandwidth and based on the number of data symbols included in the TTI, a number of data Resource Elements (REs) in the TTI, and select the TBS from a data structure, based on the calculated number of data REs. Further aspects of the disclosure pertain to a base station, a UE, methods, computer programs, computer- readable recording media and a system.
Technologies
Product
Use Cases
Services
Claim
1. An apparatus (100, 1102) for selecting a Transport Block Size, TBS, for a transmitter of a communication system, wherein the communication system supports variable Transmission Time Interval, TTI, lengths regarding the number of symbols to be transmitted in one TTI, the apparatus (100, 1102) being configured to:', 'receive first information indicative of a TTI length;', 'receive second information indicative of a number of reference symbols included in the TTI;', 'decode, from the first information, the TTI length;', 'decode, from the second information, the number of reference symbols included in the TTI;', 'calculate, based on the TTI length and based on the number of reference symbols included in the TTI, a number of data symbols included in the TTI;', 'calculate, based on an allocation bandwidth and based on the number of data symbols included in the TTI, a number of data Resource Elements, REs, in the TTI; and', 'select the TBS from a data structure (900), based on the calculated number of data REs.
2. The apparatus (100, 1102) of claim 1, wherein', 'the apparatus (100, 1102) is configured to calculate the number of data symbols included in the TTI by using the equation D = L - R, wherein D is the number of data symbols included in the TTI, L is the TTI length represented by the number of symbols to be transmitted in one TTI, and R is the number of reference symbols included in the TTI.
3. The apparatus (100, 1102) of claims 1 or 2, wherein', 'the apparatus is configured to calculate the number of data REs in the TTI by using the equation N = B*D*S, wherein N is the number of data REs in the TTI, B is the allocation bandwidth represented by a number of Physical Resource Blocks, PRBs, D is the number of data symbols included in the TTI, and S is the number of subcarriers in one PRB.
4. The apparatus (100, 1102) of claim 3, wherein', 'the number of subcarriers in one PRB is S = 12.
5. The apparatus (100, 1102) of any of claims 1 to 4, wherein', 'the first information and the second information are included in a Downlink Control Information, DCI, received by the apparatus (100, 1102).
6. The apparatus (100, 1102) of any of claims 1 to 5, wherein', 'the apparatus (100, 1102) is configured to select the TBS from the data structure (900), based on the calculated number of data REs and based on a TBS index.
7. The apparatus (100, 1102) of claim 6, wherein', 'the apparatus (100, 1102) is configured to receive information indicative of the TBS index.
8. The apparatus (100, 1102) of any of claims 1 to 7, wherein', 'the data structure is a lookup table (900).
9. The apparatus (100, 1102) of any of claims 1 to 8, wherein', 'the number of reference symbols included in the TTI is a number of', 'Demodulation Reference Symbols, DMRS, included in the TTI, and, optionally, wherein', 'the number of reference symbols included in the TTI is either R = 0 or R =1
10. The apparatus (100, 1102) of any of claims 1 to 9, wherein', 'the TTI is a short TTI, sTTI
11. A User Equipment, UE, comprising the apparatus (100, 1102) of any of claims 1 to 10
12. An apparatus (200, 1000) for selecting a Transport Block Size, TBS, for a transmitter of a communication system, wherein the communication system supports variable Transmission Time Interval, TTI, lengths regarding the number of symbols to be transmitted in one TTI, the apparatus (200, 1000) being configured to:', 'prepare downlink transmission using an allocation bandwidth B represented by a number of Physical Resource Blocks, PRBs, and using a downlink ΤÎxa0 having a TTI length L represented by the number of symbols to be transmitted in one TTI;', 'determine a number C of symbols in the TTI that have a Cell-specific', 'Reference Signal, CRS;
determine a number R of symbols in the TTI that have a Demodulation Reference Symbol, DMRS;', 'calculate, based on the allocation bandwidth B, based on the TTI length L, based on the number C of symbols in the TTI that have a Cell-specific Reference Signal, CRS, and based on the number R of symbols in the TTI that have a', 'Demodulation Reference Symbol, DMRS, a number of data Resource Elements, REs, in the TTI; and', 'select the TBS from a data structure (900), based on the calculated number of data REs
13. The apparatus (200, 1000) of claim 12, wherein', 'the apparatus (200, 1000) is configured to determine the number C of symbols in the TTI that have a CRS based on a start index of the TTI and based on the TTI length L
14. The apparatus (200, 1000) of claim 12 or 13, wherein the apparatus (200, 1000) is configured to', 'determine a number NDMRS of Demodulation Reference Symbol Resource Elements, DMRS REs, per Physical Resource Block, PRB, used in downlink, DL, in symbols with DMRS;', 'determine a number NCRS of Cell-specific Reference Signal Resource Elements, CRS REs, per Physical Resource Block, PRB, used in downlink, DL, in symbols with CRS, wherein', 'the calculation of the number of data REs in the TTI is further based on the number NDMRS of DMRS REs per PRB used in DL in symbols with DMRS and based on the number NCRS of CRS REs per PRB used in DL in symbols with CRS
15. The apparatus (200, 1000) of claim 14, wherein', 'the apparatus is configured to calculate the number of data REs in the TTI by using the equation N = B*(L*S - C*NCRS - R* DMRS), wherein N is the number of data REs in the TTI, B is the allocation bandwidth represented by a number of Physical Resource Blocks, PRBs, L is the TTI length represented by the number of symbols to be transmitted in one TTI, S is the number of subcarriers in one PRB, C is the number of symbols in the TTI that have a CRS, NCRS is the number of CRS REs per PRB used in DL in symbols with CRS, R is the number of symbols in the TTI that have a DMRS, and NDMRS is a number of DMRS REs per PRB used in DL in symbols with DMRS
16. The apparatus (200, 1000) of claim 15, wherein', 'the number of subcarriers in one PRB is S = 12
17. The apparatus (200, 1000) of any of claims 12 to 16, wherein', 'the apparatus (200, 1000) is configured to select the TBS from the data structure (900), based on the calculated number of data REs and based on a TBS index
18. The apparatus (200, 1000) of any of claims 12 to 17, wherein', 'the data structure is a lookup table (900)
19. The apparatus (200, 1000) of any of claims 12 to 18, wherein', 'the TTI is a short TTI, sTTI.
20. A base station comprising the apparatus (200, 1000) of any of claims 12 to 19.
21. A system comprising the user element, UE, of claims 11 and the base station of claim 20.
22. An apparatus (300, 1102, 1000) for selecting a Transport Block Size, TBS, for a transmitter of a communication system, wherein the communication system supports variable Transmission Time Interval, TTI, lengths regarding the number of symbols to be transmitted in one TTI, the apparatus (300, 1102, 1000) being configured to:', 'calculate a number of data symbols included in the TTI;', 'determine an allocation bandwidth represented by a number of Physical Resource Blocks, PRBs; and', 'select the TBS from a data structure, based on the calculated number of data symbols included in the TTI, based on the number of PRBs, and based on a TBS index.
23. The apparatus (300, 1102, 1000) of claim 22, wherein', 'the data structure comprises a set of lookup tables, wherein for each number of data symbols included in the TTI, a lookup table is provided.
24. A method (400) for selecting a Transport Block Size, TBS, for a transmitter of a communication system, wherein the communication system supports variable Transmission Time Interval, TTI, lengths regarding the number of symbols to be transmitted in one TTI, the method (400) comprising:', 'receiving (402) first information indicative of a TTI length;', 'receiving (404) second information indicative of a number of reference symbols included in the TTI;', 'decoding (406), from the first information, the TTI length;', 'decoding (408), from the second information, the number of reference symbols included in the TTI;', 'calculating (410), based on the TTI length and based on the number of reference symbols included in the TTI, a number of data symbols included in the TTI;', 'calculating (412), based on an allocation bandwidth and based on the number of data symbols included in the TTI, a number of data Resource Elements, REs, in the TTI; and', 'selecting (414) the TBS from a data structure (900), based on the calculated number of data REs.
25. The method (400) of claim 24, wherein', 'calculating (410) the number of data symbols included in the TTI is carried out by using the equation D = L - R, wherein D is the number of data symbols included in the ΤΤÎx8a, L is the TTI length represented by the number of symbols to be', 'transmitted in one TTI, and R is the number of reference symbols included in the TTI.
26. The method (400) of claims 24 or 25, wherein', 'calculating (412) the number of data REs in the TTI is carried out by using the equation N = B*D*S, wherein N is the number of data REs in the TTI, B is the allocation bandwidth represented by a number of Physical Resource Blocks, PRBs, D is the number of data symbols included in the TTI, and S is the number of', 'subcarriers in one PRB.
27. The method (400) of claim 26, wherein', 'the number of subcarriers in one PRB is S = 12.
28. The method (400) of any of claims 24 to 27, wherein', 'the first information and the second information are included in a Downlink Control Information, DCI.
29. The method (400) of any of claims 24 to 28, wherein', 'selecting (414) the TBS from the data structure (900) is based on the calculated number of data REs and based on a TBS index.
30. The method (400) of claims 29, further comprising', 'receiving information indicative of the TBS index.
31. The method (400) of any of claims 24 to 30, wherein', 'the data structure is a lookup table (900).
32. The method (400) of any of claims 24 to 31, wherein', 'the number of reference symbols included in the TTI is a number of', 'Demodulation Reference Symbols, DMRS, included in the TTI, and, optionally, wherein', 'the number of reference symbols included in the TTI is either R = 0 or R =1.
33. The method (400) of any of claims 24 to 32, wherein', 'the TTI is a short TTI, sTTI.
34. The method (400) of any of claims 24 to 33, wherein the method is carried out by a User Equipment, UE, of the communication system.
35. A method (500) for selecting a Transport Block Size, TBS, for a transmitter of a communication system, wherein the communication system supports variable Transmission Time Interval, TTI, lengths regarding the number of symbols to be transmitted in one TTI, the method (500) comprising:', 'preparing (502) downlink transmission using an allocation bandwidth B represented by a number of Physical Resource Blocks, PRBs, and using a downlink TTI having a TTI length L represented by the number of symbols to be transmitted in one TTI;', 'determining (504) a number C of symbols in the TTI that have a Cell-specific Reference Signal, CRS;', 'determining (506) a number R of symbols in the TTI that have a', 'Demodulation Reference Symbol, DMRS;
calculating (508), based on the allocation bandwidth B, based on the TTI length L, based on the number C of symbols in the TTI that have a Cell-specific Reference Signal, CRS, and based on the number R of symbols in the TTI that have a Demodulation Reference Symbol, DMRS, a number of data Resource Elements, REs, in the TTI; and', 'selecting (510) the TBS from a data structure (900), based on the calculated number of data REs.
36. The method (500) of claim 35, wherein', 'determining (504) the number C of symbols in the TTI that have a CRS is based on a start index of the TTI and based on the TTI length L.
37. The method (500) of claims 35 or 36, wherein the method (500) further comprises:', 'determining a number NDMRS of Demodulation Reference Symbol Resource Elements, DMRS REs, per Physical Resource Block, PRB, used in downlink, DL, in symbols with DMRS;', 'determining a number NCRS of Cell-specific Reference Signal Resource', 'Elements, CRS REs, per Physical Resource Block, PRB, used in downlink, DL, in symbols with CRS, wherein', 'calculating the number of data REs in the TTI is further based on the number NDMRS of DMRS REs per PRB used in DL in symbols with DMRS and based on the number NCRS of CRS REs per PRB used in DL in symbols with CRS.
38. The method (500) of claim 37, wherein', 'calculating (508) the number of data REs in the TTI is carried out by using the equation N = B*(L*S - C*NCRS - R*NDMRS), wherein N is the number of data REs in the TTI, B is the allocation bandwidth represented by a number of Physical Resource Blocks, PRBs, L is the TTI length represented by the number of symbols to be transmitted in one TTI, S is the number of subcarriers in one PRB, C is the number of symbols in the TTI that have a CRS, NCRS is the number of CRS REs per PRB used in DL in symbols with CRS, R is the number of symbols in the TTI that have a DMRS, and NDMRS is a number of DMRS REs per PRB used in DL in symbols with DMRS.
39. The method (500) of claim 38, wherein', 'the number of subcarriers in one PRB is S = 12.
40. The method (500) of any of claims 35 to 39, wherein', 'selecting the TBS from the data structure (900) is based on the calculated number of data REs and based on a TBS index.
41. The method (500) of any of claims 35 to 40, wherein', 'the data structure is a lookup table (900).
42. The method (500) of any of claims 35 to 41, wherein', 'the TTI is a short TTI, sTTI.
43. The method (500) of any of claims 35 to 42, wherein', 'the method (500) is carried out by a base station of the communication system.
44. A method (600) for selecting a Transport Block Size, TBS, for a transmitter of a communication system, wherein the communication system supports variable Transmission Time Interval, TTI, lengths regarding the number of symbols to be transmitted in one TTI, the method (600) comprising:', 'calculating (602) a number of data symbols included in the TTI;', 'determining (604) an allocation bandwidth represented by a number of Physical Resource Blocks, PRBs; and', 'selecting (606) the TBS from a data structure, based on the calculated number of data symbols included in the TTI, based on the number of PRBs, and based on a TBS index.
45. The method (600) of claim 44, wherein', 'the data structure comprises a set of lookup tables, wherein for each number of data symbols included in the TTI, a lookup table is provided.
46. A computer program product comprising program code portions to perform the steps of any of claims 24 to 45 when the computer program product is executed on one or more processing devices.
47. The computer program product of claim 46, stored on one or more computer- readable recording media.']
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SUMMARY
ClaimChart-EP3411972A1-STO
Patent number:EP3411972A1
Claim Chart Type : SEP Claim Chart
Price: 200 €
Note:
The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
The information in grey was provided by the patent holder
The information in purple was extracted from the FrandAvenue
Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.