Method for transmitting packet data with hybrid FEC/ARG type II

Claim 1

A method for transmitting packet data in an air interface of digital cellular radio telephone system based on a hybrid forward error correction/automatic repeat request, i.e. FEC/ARQ type II, comprising the following steps for each packet: a) encoding the bits of the packet of user data, header and frame check sequence, using error correcting codes and storing the resulting bits for transmission at the sender side; b) transmitting a predefined part of the encoded bits that is bigger than the original packet; c) collecting and storing all received data at the receiver side with a storage capacity big enough to store at least the encoded bits of one packet; d) deciding on transmission success at the receiver side, based on the stored data and sending a positive acknowledge (ACK) if the transmission has been decided to be successful and a negative acknowledgment (NAK) if not; e) checking at the sender side of the positive or negative acknowledgment (ACK or NAK) and going to step b) in case of negative acknowledge (NAK) otherwise in case of positive acknowledgment (ACK) the transmitting of the packet is being completed and the receiver storage is cleared; and wherein, in the case of the negative acknowledgment, said step of transmitting a predefined part of the encoded bits is via a first transmission, and there are further steps of transmitting the encoded packet bits via a second transmission, collecting and storing all received data of the second transmission at the receiver side, and calculating packet data from said first and said second transmissions.

Claim 2

A method for transmitting packet data in an air interface of digital cellular radio telephone system based on a hybrid forward error correction/automatic repeat request, i.e. FEC/ARQ type II, comprising the following steps for each packet: a) encoding the bits of the packet of user data, header and frame check sequence, using error correcting codes and storing the resulting bits for transmission at the sender side; b) transmitting a predefined part of the encoded bits that is bigger than the original packet; c) collecting and storing all received data at the receiver side with a storage capacity big enough to store at least the encoded bits of one packet; d) deciding on transmission success at the receiver side, based on the stored data and sending a positive acknowledge (ACK) if the transmission has been decided to be successful and a negative acknowledgment (NAK) if not; e) checking at the sender side of the positive or negative acknowledgment (ACK or NAK) and going to step b) in case of negative acknowledge (NAK) otherwise in case of positive acknowledgment (ACK) the transmitting of the packet is being completed and the receiver storage is cleared; and wherein, in the case of the negative acknowledgment, said step of transmitting a predefined part of the encoded bits is via a first transmission, and there are further steps of transmitting the encoded packet bits via a second transmission, collecting and storing all received data of the second transmission at the receiver side, and calculating packet data from said first and said second transmissions.

Claim 10

A method for transmitting packet data in an air interface of a digital cellular radio telephone system based on a hybrid forward error correction/automatic repeat request, i.e. FEC/ARQ type II, comprising the following steps for each packet: a) encoding the bits of the packet of user data, header and frame check sequence, using error correcting codes and storing the resulting bits for transmission at the sender side; b) transmitting a predefined part of the encoded bits that is bigger than the original packet; c) collecting and storing all received data at the receiver side with a storage capacity big enough to store at least the encoded bits of one packet; d) deciding on transmission success at the receiver side, based on the stored data and sending a positive acknowledge (ACK) if the transmission has been decided to be successful and a negative acknowledgment (NAK) if not; e) checking at the sender side of the positive or negative acknowledgment (ACK or NAK) and going to step b) in case of negative acknowledgment (NAK) otherwise in case of positive acknowledgment (ACK) the transmitting of the packet is being completed and the receiver storage is cleared; wherein, in the case the immediate decision on successful transmission is not possible in time, the success is predicted and the prediction is based on the stored data including log-likelihood-values and the number of not successful receptions.

Claim 11

A method for transmitting packet data in an air interface of a digital cellular radio telephone system based on a hybrid forward error correction/automatic repeat request, i.e. FEC/ARQ type II, comprising the following steps for each packet: a) encoding the bits of the packet of user data, header and frame check sequence, using error correcting codes and storing the resulting bits for transmission at the sender side; b) transmitting a predefined part of the encoded bits that is bigger than the original packet; c) collecting and storing all received data at the receiver side with a storage capacity big enough to store at least the encoded bits of one packet; d) deciding on transmission success at the receiver side, based on the stored data and sending a positive acknowledge (ACK) if the transmission has been decided to be successful and a negative acknowledgment (NAK) if not; e) checking at the sender side of the positive or negative acknowledgment (ACK or NAK) and going to step b) in case of negative acknowledgment (NAK) otherwise in case of positive acknowledgment (ACK) the transmitting of the packet is being completed and the receiver storage is cleared; wherein, in the case the immediate decision on successful transmission is not possible in time, the success is predicted and the prediction is based on the stored data including log-likelihood-values and the number of not successful receptions.

Claim 12

A method for transmitting packet data in an air interface of a digital cellular radio telephone system based on a hybrid forward error correction/automatic repeat request, comprising the following steps for each packet: encoding the bits of the packet of user data, header and frame check sequence, using error correcting codes and storing the resulting bits for transmission at the sender side; transmitting a predefined part of the encoded bits that is bigger than the original packet; storing all received data at the receiver side including the encoded bits of one packet; deciding on transmission success at the receiver side, and communicating a decision of the success to the sender side; re-transmitting the predefined part of the encoded bits that is bigger than the original packet in the event of an adverse decision on the success of transmission; and predicting the success of a transmission based on the stored data including log-likelihood values of transmitted bits in the case wherein there is no immediate decision on the success of the transmission.

Claim 13

A method for transmitting packet data in an air interface of a digital cellular radio telephone system based on a hybrid forward error correction/automatic repeat request, comprising the following steps for each packet: encoding the bits of the packet of user data, header and frame check sequence, using error correcting codes and storing the resulting bits for transmission at the sender side; transmitting a predefined part of the encoded bits that is bigger than the original packet; storing all received data at the receiver side including the encoded bits of one packet; deciding on transmission success at the receiver side, and communicating a decision of the success to the sender side; re-transmitting the predefined part of the encoded bits that is bigger than the original packet in the event of an adverse decision on the success of transmission; and predicting the success of a transmission based on the stored data including log-likelihood values of transmitted bits in the case wherein there is no immediate decision on the success of the transmission.

Claim 15

A method for transmitting packet data in an air interface of a digital cellular radio telephone system based on a hybrid forward error correction/automatic repeat request, comprising the following steps for each packet: encoding the bits of the packet of user data, header and frame check sequence, using error correcting codes and storing the resulting bits for transmission at the sender side; transmitting a predefined part of the encoded bits that is bigger than the original packet; storing all received data at the receiver side including the encoded bits of one packet; deciding on transmission success at the receiver side, and communicating a decision of the success to the sender side; re-transmitting the predefined part of the encoded bits that is bigger than the original packet in the event of an adverse decision on the success of transmission; storing all received data at the receiver side including the encoded bits of one packet received during said re-transmission step; and calculating packet data from said first and said second transmissions.

Claim 16

A method for transmitting packet data in an air interface of a digital cellular radio telephone system based on a hybrid forward error correction/automatic repeat request, comprising the following steps for each packet: encoding the bits of the packet of user data, header and frame check sequence, using error correcting codes and storing the resulting bits for transmission at the sender side; transmitting a predefined part of the encoded bits that is bigger than the original packet; storing all received data at the receiver side including the encoded bits of one packet; deciding on transmission success at the receiver side, and communicating a decision of the success to the sender side; re-transmitting the predefined part of the encoded bits that is bigger than the original packet in the event of an adverse decision on the success of transmission; storing all received data at the receiver side including the encoded bits of one packet received during said re-transmission step; and calculating packet data from said first and said second transmissions.