Method and apparatus for transmitting ACK/NACK
View Patent ↗A technology enabling a terminal to receive acknowledgement (ACK)/negative ACK (NACK) information about data transmitted from the terminal is provided. The method includes receiving cyclic shift information for a reference signal from the base station; transmitting, to the base station, the data and a reference signal which is cyclic-shifted using a cyclic shift value, the cyclic shift value being determined based on a dynamic cyclic shift value mapped one-to-one to the cyclic shift information for the reference signal; and receiving, from the base station, the ACK/NACK information about the transmitted data through a radio resource of a downlink channel, the radio resource of the downlink channel being identified based on a modifier mapped one-to-one to the cyclic shift information for the reference signal.
1. A communication method comprising:
causing a user equipment (UE) to receive cyclic shift information for reference signal;
determining a dynamic cyclic shift value based on the cyclic shift information for reference signal;
generating a reference signal by cyclically shifting a sequence at least based on the dynamic cyclic shift value;
causing the UE to transmit data and the reference signal using one or more uplink radio resources; and
causing the UE to receive an acknowledgement for the transmitted data using a Physical Hybrid ARQ Indicator Channel (PHICH) resource,
wherein the dynamic cyclic shift value is determined based on the cyclic shift information for reference signal according to Table 1 and the PHICH resource is determined at least based on the cyclic shift information for reference signal
TABLE 1
cyclic shift information
dynamic cyclic shift
for reference signal
value
000
0
001
6
010
3
011
4
100
2
101
8
110
10
111
9.
2. The method of claim 1 , further comprising:
determining a modifier based on the cyclic shift information for reference signal according to Table 2 ; and
determining the PHICH resource based on the modifier
TABLE 2
cyclic shift information for reference
signal
modifier
000
0
001
1
010
2
011
3
100
4
101
5
110
6
111
7.
3. The method of claim 2 , wherein determining the PHICH resource comprises a modulo-four operation.
4. The method of claim 1 , wherein the reference signal is a Demodulation Reference signal (DMRS).
5. The method of claim 1 , wherein the cyclic shift information for reference signal is three (3) bits long, and is received by DCI (Downlink Control Information) format 0.
6. The method of claim 1 , wherein a mapping according to Table 1 prevents collision of the PHICH resource obtained based on a modulo-four operation.
7. A communication device for a user equipment (UE), the device comprising:
a circuitry,
wherein the circuitry is configured to:
cause the UE to receive cyclic shift information for reference signal;
determine a dynamic cyclic shift value based on the cyclic shift information for reference signal;
generate a reference signal by cyclically shifting a sequence at least based on the dynamic cyclic shift value;
cause the UE to transmit data and the reference signal using one or more uplink radio resources; and
cause the UE to receive an acknowledgement for the transmitted data using a Physical Hybrid ARQ Indicator Channel (PHICH) resource,
wherein the dynamic cyclic shift value is determined based on the cyclic shift information for reference signal according to Table 3 and the PHICH resource is determined at least based on the cyclic shift information for reference signal
TABLE 3
cyclic shift information
dynamic cyclic shift
for reference signal
value
000
0
001
6
010
3
011
4
100
2
101
8
110
10
111
9.
8. The device of claim 7 , wherein the circuitry is configured to:
determine a modifier based on the cyclic shift information for reference signal according to Table 4 ; and determine the PHICH resource based on the modifier
TABLE 4
cyclic shift information for reference
signal
modifier
000
0
001
1
010
2
011
3
100
4
101
5
110
6
111
7.
9. The device of claim 8 , wherein the circuitry is configured to determine the PHICH resource by using a modulo-four operation.
10. The device of claim 7 , wherein the reference signal is a Demodulation Reference signal (DMRS).
11. The device of claim 7 , wherein the cyclic shift information for reference signal is three (3) bits long, and is received by DCI (Downlink Control Information) format 0.
12. The device of claim 7 , wherein a mapping according to Table 3 prevents collision of the PHICH resource obtained based on a modulo-four operation.
13. A communication terminal comprising:
a circuitry,
wherein the circuitry is configured to:
cause the terminal to receive cyclic shift information for reference signal; determine a dynamic cyclic shift value based on the cyclic shift information for reference signal;
generate a reference signal by cyclically shifting a sequence at least based on the dynamic cyclic shift value;
cause the terminal to transmit data and the reference signal using one or more uplink radio resources; and
cause the terminal to receive an acknowledgement for the transmitted data using a Physical Hybrid ARQ Indicator Channel (PHICH) resource,
wherein the dynamic cyclic shift value is determined based on the cyclic shift information for reference signal according to Table 5 and the PHICH resource is determined at least based on the cyclic shift information for reference signal
TABLE 5
cyclic shift information for reference
dynamic cyclic shift
signal
value
000
0
001
6
010
3
011
4
100
2
101
8
110
10
111
9.
14. The terminal of claim 13 , wherein the circuitry is configured to:
determine a modifier based on the cyclic shift information for reference signal according to Table 6; and
determine the PHICH resource based on the modifier
TABLE 6
cyclic shift information for reference
signal
modifier
000
0
001
1
010
2
011
3
100
4
101
5
110
6
111
7.
15. The terminal of claim 14 , wherein the circuitry is configured to determine the PHICH resource by using a modulo-four operation.
16. The terminal of claim 13 , wherein the reference signal is a Demodulation Reference signal (DMRS).
17. The terminal of claim 13 , wherein the cyclic shift information for reference signal is three (3) bits long, and is received by DCI (Downlink Control Information) format 0.
18. The terminal of claim 13 , wherein a mapping according to Table 5 prevents collision of the PHICH resource obtained based on a modulo-four operation.