Uplink control signaling in cellular telecommunication system
A method, apparatus, and computer program for controlling allocation of control message fields in uplink transmission in a cellular telecommunication system are presented. Uplink control message fields are allocated to the resources of a physical uplink shared traffic channel according to an uplink transmission scheme selected for a user terminal. The control message fields are allocated so that transmission performance of the control messages is optimized for the selected uplink transmission scheme.
1. An apparatus comprising:
a transmitter configured to transmit control information to a user terminal; and
a receiver configured to receive, from the user terminal, a first control message field in a physical uplink shared channel (PUSCH), the first control message field having a first number of coded symbols based on a first modulation and coding scheme (MCS) offset;
wherein the first number of coded symbols is a function of at least: the first MCS offset, the number of bits of the first control message field, and the number of sub-carriers carrying the PUSCH; and
further wherein the first number of coded symbols is directly proportional to the number of sub-carriers carrying the PUSCH.
2. The apparatus of claim 1 , wherein:
the receiver is further configured to receive, from the user terminal, a second control message field in the PUSCH, the second control message field having a second number of coded symbols based on a second MCS offset.
3. The apparatus of claim 2 , wherein the first control message field is a hybrid automatic repeat request (HARQ) acknowledgement (ACK) field and the second control message field is either a rank indicator (RI) field or a channel quality indicator (CQI) field.
4. The apparatus of claim 3 , wherein the first MCS offset is different than the second MCS offset.
5. The apparatus of claim 1 , wherein the first MCS offset corresponds to an offset between reception quality of traffic data received in the PUSCH and control data received in the first control message field.
6. The apparatus of claim 1 , wherein:
the first number of coded symbols is directly proportional to a product of: the first MCS offset, the number of bits of the first control message field, the number of sub-carriers carrying the PUSCH, and the number of orthogonal frequency division multiplexing (OFDM) symbols carrying the PUSCH per sub-frame.
7. The apparatus of claim 1 , wherein the first control message field is channel coded using a channel coding scheme corresponding to the first MCS offset.
8. The apparatus of claim 1 , wherein the first MCS offset is based on a selected transmission scheme, wherein the selected transmission scheme is selected from a plurality of transmission schemes including spatial multiplexing and transmission diversity.
9. A non-transitory computer readable storage medium storing instructions thereon that, when executed, causes at least one processor of one or more processors to:
transmit control information to a user terminal; and
receive, from the user terminal, a first control message field in a physical uplink shared channel (PUSCH), the first control message field having a first number of coded symbols based on a first modulation and coding scheme (MCS) offset;
wherein the first number of coded symbols is a function of at least: the first MCS offset, the number of bits of the first control message field, and the number of sub-carriers carrying the PUSCH; and
further wherein the first number of coded symbols is directly proportional to the number of sub-carriers carrying the PUSCH.
10. The non-transitory computer readable storage medium of claim 9 , wherein the instructions, when executed, causes at least one processor of the one or more processors to:
receive, from the user terminal, a second control message field in the PUSCH, the second control message field having a second number of coded symbols based on a second MCS offset.
11. The non-transitory computer readable storage medium of claim 10 , wherein the first control message field is a hybrid automatic repeat request (HARQ) acknowledgement (ACK) field and the second control message field is either a rank indicator (RI) field or a channel quality indicator (CQI) field.
12. The non-transitory computer readable storage medium of claim 11 , wherein the first MCS offset is different than the second MCS offset.
13. The non-transitory computer readable storage medium of claim 9 , wherein the first MCS offset corresponds to an offset between reception quality of traffic data received in the PUSCH and control data received in the first control message field.
14. The non-transitory computer readable storage medium of claim 9 , wherein;
the first number of coded symbols is directly proportional to a product of: the first MCS offset, the number of bits of the first control message field, the number of sub-carriers carrying the PUSCH, and the number of orthogonal frequency division multiplexing (OFDM) symbols carrying the PUSCH per sub-frame.
15. The non-transitory computer readable storage medium of claim 9 , wherein the first control message field is channel coded using a channel coding scheme corresponding to the first MCS offset.
16. The non-transitory computer readable storage medium of claim 9 , wherein the first MCS offset is based on a selected transmission scheme, wherein the selected transmission scheme is selected from a plurality of transmission schemes including spatial multiplexing and transmission diversity.
17. A method comprising:
transmitting control information to a user terminal; and
receiving, from the user terminal, a first control message field in a physical uplink shared channel (PUSCH), the first control message field having a first number of coded symbols based on a first modulation and coding scheme (MCS) offset;
wherein the first number of coded symbols is a function of at least: the first MCS offset, the number of bits of the first control message field, and the number of sub-carriers carrying the PUSCH; and
further wherein the first number of coded symbols is directly proportional to the number of sub-carriers carrying the PUSCH.
18. The method of claim 17 , further comprising:
receiving, from the user terminal, a second control message field in the PUSCH, the second control message field having a second number of coded symbols based on a second MCS offset.
19. The method of claim 18 , wherein the first control message field is a hybrid automatic repeat request (HARQ) acknowledgement (ACK) field and the second control message field is either a rank indicator (RI) field or a channel quality indicator (CQI) field.
20. The method of claim 19 , wherein the first MCS offset is different than the second MCS offset.
21. The method of claim 17 , wherein:
the first number of coded symbols is directly proportional to a product of: the first MCS offset, the number of bits of the first control message field, the number of sub-carriers carrying the PUSCH, and the number of orthogonal frequency division multiplexing (OFDM) symbols carrying the PUSCH per sub-frame.
22. The method of claim 17 , wherein the first control message field is channel coded with a channel coding scheme corresponding to the first MCS offset.
23. The method of claim 17 , wherein the first MCS offset is based on a selected transmission scheme, wherein the selected transmission scheme is selected from a plurality of transmission schemes including spatial multiplexing and transmission diversity.