Resource allocation size dependent transport block size signaling
The invention relates to a method for providing control signalling associated to a transport block in a mobile communication system. Furthermore, the invention also provides a receiving apparatus and a transmitting apparatus that performs the methods proposed herein. In order to obtain a control signaling mechanism that is increasing the number of available transport block sizes that can be used for transmissions of a transport block, without increasing the control signaling overhead, the invention suggests to apply a partitioning to the transport block size indices defined over the entire range of applicable resource allocation sizes and modulation and coding scheme levels, wherein the transport blocks size indicator is selecting the transport block size index from a respective partition depending on the resource allocation size.
1. A method for receiving a transport block in a mobile communication system, the method being performed by a receiving apparatus and comprising:
receiving a control channel comprising a transport block size indicator and a resource allocation size indicator for a transmission of a transport block destined to the receiving apparatus,
determining a transport block size index based on the resource allocation size indicator and the transport block size indicator, wherein the resource allocation size indicator determines the minimum or the maximum transport block size index of a subset of non-consecutive transport block size indices of all available transport block size indices and the transport block size indicator determines the transport block size index from the subset of non-consecutive transport block size indices corresponding to the transport block size of the transport block, and
extracting the transport block from the shared channel based on the resource allocation size indicator defining the number of resource blocks used to transmit the transport block and based on the selected transport block size index indicating the size of the transport block.
2. The method according to claim 1 , wherein the transport block size index is determined based on a function of the transport block size indicator and the resource allocation size indicator.
3. The method according to claim 2 , wherein the transport block size indices of subsets of the transport block size indices for at least two adjacent resource allocation sizes overlap.
4. The method according to claim 1 , wherein the transport block size index is determined from the subset of non-consecutive transport block size indices by adding an offset defined by the transport block size indicator to the minimum transport block size index of the subset of non-consecutive transport block size indices.
5. The method according to claim 4 , wherein the offset is a multiple of an integer number n, where n>1.
6. The method according to claim 5 , wherein the value of the integer number n depends on the resource allocation size.
7. The method according to claim 6 , wherein the transport block size indices of subsets of the transport block size indices for at least two adjacent resource allocation sizes overlap.
8. The method according to claim 5 , wherein the integer number n depends on the resource block group size.
9. The method according to claim 8 , wherein the transport block size indices of subsets of the transport block size indices for at least two adjacent resource allocation sizes overlap.
10. The method according to claim 5 , wherein the transport block size indices of subsets of the transport block size indices for at least two adjacent resource allocation sizes overlap.
11. The method according to claim 4 , wherein the transport block size indices of subsets of the transport block size indices for at least two adjacent resource allocation sizes overlap.
12. The method according to claim 1 , wherein the transport block size index is determined from the subset of non-consecutive transport block size indices by subtracting an offset defined by the transport block size indicator from the maximum transport block size index of the subset of non-consecutive transport block size indices.
13. The method according to claim 12 , wherein the transport block size indices of subsets of the transport block size indices for at least two adjacent resource allocation sizes overlap.
14. The method according to claim 1 , wherein the granularity of the range of transport block sizes from which the transport block size indicator selects the transport block size based on the determined transport block size index depends on the resource allocation size.
15. The method according to claim 14 , wherein the transport block size indices of subsets of the transport block size indices for at least two adjacent resource allocation sizes overlap.
16. The method according to claim 1 , wherein in case the resource allocation indicator indicates an odd number of resource blocks allocated for the transmission of the transport block, the determination of the transport block size index determines an odd transport block size index, and in case the resource allocation indicator indicates an even number of resource blocks allocated for the transmission of the transport block, the determination of the transport block size index determines an even transport block size index.
17. The method according to claim 16 , wherein the transport block size indices of subsets of the transport block size indices for at least two adjacent resource allocation sizes overlap.
18. The method according to claim 1 , wherein in case the resource allocation indicator indicates an even number of resource blocks allocated for the transmission of the transport block, the determination of the transport block size index determines an odd transport block size index, and in case the resource allocation indicator indicates an odd number of resource blocks allocated for the transmission of the transport block, the determination of the transport block size index determines an even transport block size index.
19. The method according to claim 18 , wherein the transport block size indices of subsets of the transport block size indices for at least two adjacent resource allocation sizes overlap.
20. The method according to claim 1 , wherein the transport block size indices of subsets of the transport block size indices for at least two adjacent resource allocation sizes overlap.
21. The method according to claim 1 , wherein a resource allocation size indicator for at least one resource allocation size of available resource allocation sizes is determining the minimum or maximum transport block size index of a subset of consecutive transport block size indices of all available transport block size indices and the transport block size indicator determines the transport block size index from the subset of consecutive transport block size indices corresponding to the transport block size of the transport block.
22. A method for transmitting a transport block and a related control channel in a mobile communication system, the method being performed by a transmitting apparatus and comprising:
selecting for a transport block to be transmitted from a combination of a transport block size and resource allocation size out of plural predefined combinations of transport block size and resource allocation size, wherein the transport block sizes predefined by said combinations for a given resource allocation size have non-consecutive transport block size indices,
determining, based on the selected combination of transport block size and resource allocation size, a transport block size indicator indicative of an offset to the minimum transport block size index yielded by the resource allocation size of said selected combination, and
transmitting the transport block and a control channel comprising the transport block size indicator and a resource allocation size indicator indicative of the transport block size and resource allocation size of said selected combination.
23. The method according to claim 22 , wherein the combination of a transport block size and resource allocation size for the transport block is selected based on a channel quality parameter.
24. The method according to claim 22 , wherein the combination of a transport block size and resource allocation size for the transport block is selected based on the size of a protocol data unit to be mapped to the transport block.
25. The method according to claim 22 , further comprising the step of mapping a protocol data unit to the transport block.
26. The method according to claim 22 , wherein k is the number of possible transport block sizes and m is the number of different transport block sizes predefined by said combinations for a given resource allocation size, and wherein the equation k≦m is satisfied.
27. A receiving apparatus for receiving a transport block in a mobile communication system, the receiving apparatus comprising:
a receiver section that receives a control channel comprising a transport block size indicator and a resource allocation size indicator for a transmission of a transport block destined to the receiving apparatus,
a processing section that determines a transport block size index based on the resource allocation size indicator and the transport block size indicator, wherein the resource allocation size indicator is determining the minimum or maximum transport block size index of a subset of non-consecutive transport block size indices of all available transport block size indices and the transport block size indicator determines the transport block size index from the subset of non-consecutive transport block size indices corresponding to the transport block size of the transport block, and
an extraction section that extracts the transport block from the shared channel based on the resource allocation size indicator defining the number of resource blocks used to transmit the transport block and based on the selected transport block size index indicating the size of the transport block.
28. A non-transitory computer-readable storage medium storing instructions that, when executed by a processor of a receiving apparatus, cause the receiving apparatus to receive a transport block in a mobile communication system, by:
receiving a control channel comprising a transport block size indicator and a resource allocation size indicator for a transmission of a transport block destined to the receiving apparatus, determining a transport block size index based on the resource allocation size indicator and the transport block size indicator, wherein the resource allocation size indicator is
determining the minimum or maximum transport block size index of a subset of non-consecutive transport block size indices of all available transport block size indices and the transport block size indicator determines the transport block size index from the subset of non-consecutive transport block size indices corresponding to the transport block size of the transport block, and
extracting the transport block from the shared channel based on the resource allocation size indicator defining the number of resource blocks used to transmit the transport block and based on the selected transport block size index indicating the size of the transport block.
29. A transmitting apparatus for transmitting a transport block and a related control channel in a mobile communication system, the transmitting apparatus comprising:
a selection section that selects for a transport block to be transmitted from a combination of a transport block size and resource allocation size out of plural predefined combinations of transport block size and resource allocation size, wherein the transport block sizes predefined by said combinations for a given resource allocation size have non-consecutive transport block size indices,
a processing section that determines, based on the selected combination of transport sport block size and resource allocation size, a transport block size indicator indicative of an offset to the minimum transport block size index yielded by the resource allocation size of said selected combination, and
a transmitter section that transmits the transport block and a control channel comprising the transport block size indicator and a resource allocation size indicator indicative of the resource allocation size of said selected combination.
30. A non-transitory computer-readable storage medium storing instructions that, when executed by a processor of a transmitting apparatus, cause the transmitting apparatus to transmit a transport block and a related control channel in a mobile communication system, by:
selecting for a transport block to be transmitted from a combination of a transport block size and resource allocation size out of plural predefined combinations of transport block size and resource allocation size, wherein the transport block sizes predefined by said combinations for a given resource allocation size have non-consecutive transport block size indices,
determining, based on the selected combination of transport block size and resource allocation size, a transport block size indicator indicative of an offset to the minimum transport block size index yielded by the resource allocation size of said selected combination, and
transmitting the transport block and a control channel comprising the transport block size indicator and a resource allocation size indicator indicative of the resource allocation size of said selected combination.