Method of transmitting and receiving acknowledgment signal in a wireless communication system
A method of receiving an acknowledgement (ACK) signal from at least one access terminal (AT) in a wireless communication system is disclosed. More specifically, the method includes transmitting at least one packet via a packet data channel from an access network (AN), receiving at least one ACK signal from the at least one AT using same channelization resources, wherein each AT is assigned a code specific to each AT, and identifying the ACK signal corresponding to the transmitted packet from the received at least one ACK signal.
1. A method of receiving a plurality of acknowledgement (ACK)/negative acknowledgement (NAK) signals at a base station (BS) in a wireless communication system utilizing an orthogonal frequency division multiplexing (OFDM) scheme, the method comprising:
transmitting, by the BS, a plurality of data packets to a plurality of mobile stations;
receiving, by the BS, a plurality of first ACK/NAK signals from the plurality of mobile stations, wherein the plurality of first ACK/NAK signals are multiplexed on a first set of orthogonal frequency tones using a plurality of sequences corresponding to the plurality of mobile stations;
receiving, by the BS, a plurality of second ACK/NAK signals from the plurality of mobile stations, wherein the plurality of second ACK/NAK signals are multiplexed on a second set of orthogonal frequency tones, wherein the plurality of second ACK/NAK signals carry the same information as the plurality of first ACK/NAK signals; and
determining, by the BS, whether the plurality of data packets are successfully received by the plurality of mobile stations based on the plurality of first ACK/NAK signals and the plurality of second ACK/NAK signals,
wherein the first set of orthogonal frequency tones are different from the second set of orthogonal frequency tones over two transmission instants, and
wherein the plurality of sequences are generated from a single sequence.
2. The method of claim 1 , wherein the plurality of sequences are a plurality of scrambling sequences.
3. The method of claim 2 , wherein the plurality of scrambling sequences are pseudo noise sequence codes.
4. A method of transmitting an acknowledgement (ACK)/negative acknowledgment (NAK) signal at a mobile station in a wireless communication system utilizing an orthogonal frequency division multiplexing (OFDM) scheme, the method comprising:
receiving, by the mobile station, a data packet from a base station (BS); and
transmitting, by the mobile station, a first ACK/NAK signal to the BS via a first set of orthogonal frequency tones; and
transmitting, by the mobile station, a second ACK/NAK signal to the BS via a second set of orthogonal frequency tones,
wherein the first ACK/NAK signal and the second ACK/NACK signal carry same information and correspond to the data packet,
wherein the first set of orthogonal frequency tones and the second set of orthogonal frequency tones are shared between a plurality of mobile stations for ACK/NAK signal transmission by using a plurality of sequences corresponding to the plurality of mobile stations,
wherein the first set of orthogonal frequency tones are different from the second set of orthogonal frequency tones over two transmission instants, and
wherein the plurality of sequences are generated from a single sequence.
5. The method of claim 4 , wherein the plurality of sequences are a plurality of scrambling sequences.
6. The method of claim 5 , wherein the plurality of scrambling sequences are pseudo noise sequence codes.
7. A base station (BS) configured to receive a plurality of acknowledgement (ACK)/negative acknowledgement (NAK) signals in a wireless communication system utilizing an orthogonal frequency division multiplexing (OFDM) scheme, the BS comprising:
a transmitter for transmitting a plurality of data packets to a plurality of mobile stations;
a receiver for receiving a plurality of first ACK/NAK signals from the plurality of mobile stations, wherein the plurality of first ACK/NAK signals are multiplexed on a first set of orthogonal frequency tones using a plurality of sequences corresponding to the plurality of mobile stations, and for receiving a plurality of second ACK/NAK signals from the plurality of mobile stations, wherein the plurality of second ACK/NAK signals are multiplexed on a second set of orthogonal frequency tones, wherein the plurality of second ACK/NAK signals carry the same information as the plurality of first ACK/NAK signals; and
a processor for determining whether the plurality of data packets are successfully received by the plurality of mobile stations based on the plurality of first ACK/NAK signals and the plurality of second ACK/NAK signals,
wherein the first set of orthogonal frequency tones are different from the second set of orthogonal frequency tones over two transmission instants, and
wherein the plurality of sequences are generated from a single sequence.
8. The BS of claim 7 , wherein the plurality of sequences are a plurality of scrambling sequences.
9. The BS of claim 8 , wherein the plurality of scrambling sequences are pseudo noise sequence codes.
10. A mobile station configured to transmit an acknowledgement (ACK)/negative acknowledgment (NAK) signal in a wireless communication system utilizing an orthogonal frequency division multiplexing (OFDM) scheme, the mobile station comprising:
a receiver for receiving a data packet from a base station (BS); and
a transmitter for transmitting a first ACK/NAK signal to the BS via a first set of orthogonal frequency tones, and for transmitting a second ACK/NAK signal to the BS via a second set of orthogonal frequency tones,
wherein the first ACK/NAK signal and the second ACK/NACK signal carry same information and correspond to the data packet,
wherein the first set of orthogonal frequency tones and the second set of orthogonal frequency tones are shared between a plurality of mobile stations for ACK/NAK signal transmission by using a plurality of sequences corresponding to the plurality of mobile stations,
wherein the first set of orthogonal frequency tones are different from the second set of orthogonal frequency tones over two transmission instants, and
wherein the plurality of sequences are generated from a single sequence.
11. The mobile station of claim 10 , wherein the plurality of sequences are a plurality of scrambling sequences.
12. The mobile station of claim 11 , wherein the plurality of scrambling sequences are pseudo noise sequence codes.