Method for variable sub-carrier mapping and device using the same

A variable sub-carrier mapping method comprising the steps of:

• in a side of transmitter, applying different symbol-to-sub-carrier mapping schemes to retransmissions for an automatic retransmission request;
• and
• in the side of the transmitter, modulating symbols onto sub-carriers for transmitting,
• wherein priorities are specified for symbol locations according to symbol-to-sub-carrier mapping schemes applied in a transmission process, and
• wherein a modulated symbol bears a higher priority if an average interval between sub-carriers adopted for the symbol's transmission in the transmission process is longer, and the modulated symbol bears a lower priority if the average interval between the sub-carriers adopted for the symbol's transmission in the transmission process is shorter.

A variable sub-carrier mapping device comprising:

• a HARQ module for outputting data bits of each transmission according to a response information from receivers;
• a module for setting priorities for bit locations according to bit interleaving schemes adopted in a transmission process;
• a bit sorting module for performing data bit priority setting and transmitting;
• a variable interleaver module for interleaving data bits and adopting different interleaving schemes in different transmissions of a HARQ process;
• a modulation module for modulating the data bits and outputting a modulated signal;
• and
• a symbol-to-sub-carrier mapping module for mapping input symbols onto sub-carriers, which are transmitted via a transmitting set,
• wherein, in the bit sorting module, a bit bears a higher priority if an average interval between sub-carriers adopted for the bit's transmission in the transmission process is longer and the bit bears a lower priority if the average interval between the sub-carriers adopted for the bit's transmission in the transmission process is shorter.

A variable sub-carrier mapping device comprising:

• a receiver for receiving radio signals transmitted from a transmitting device via an air-interface;
• a symbol-to-sub-carrier mapping module for intercepting modulated symbols transmitted via sub-carriers;
• a demodulation module for demodulating the modulated symbols to output data bits;
• a variable de-interleaver for de-interleaving the data bits, where different de-interleaving schemes are applied in different transmissions of a HARQ process;
• a module for setting priorities for bit locations according to bit interleaving schemes used during a transmission process;
• a bit de-sorting module for specifying a number of system bits, same parity bits and surplus parity bits according to an applied HARQ mechanism and a slotting scheme in each HARQ transmission, and sequentially reading a corresponding number of data bits from corresponding bit locations using an input of the module for setting priorities for bit locations;
• and
• a HARQ module for performing soft combination and decoding to data packets of each transmission, and generating a response message according to a result of the decoding,
• wherein in the bit de-sorting module, a bit bears a higher priority, if an average interval between sub-carriers adopted for the bit's transmission in the transmission process is longer, and the bit bears a lower priority, if the average interval between the sub-carriers adopted for the bit's transmission in the transmission process is shorter.

A variable sub-carrier mapping device comprising:

• a HARQ module which outputs data bits of each transmission according to response information from receivers;
• a module for setting priorities for modulated symbol locations according to symbol-to-sub-carrier mapping schemes adopted in a transmission process;
• a bit sorting module for performing data bit priority setting and transmitting;
• a interleaver module for data bit interleaving;
• a modulation module for modulating data bits and outputting a modulated signal;
• and
• a variable symbol-to-sub-carrier mapping module for mapping input data bits onto sub-carriers, which are transmitted via a transmitter, according to mapping relationships between the symbols and the sub-carriers in each HARQ transmission,
• wherein a modulated symbol bears a higher priority if an average interval between sub-carriers adopted for the symbol's transmission in the transmission process is longer, and the modulated symbol bears a lower priority if the average interval between the sub-carriers adopted for the symbol's transmission in the transmission process is shorter.

A variable sub-carrier mapping device comprising:

• a receiver for receiving radio signals transmitted from a transmitting device via an air-interface;
• a variable symbol-to-sub-carrier mapping module that intercepts modulated symbols transmitted via the sub-carriers according to the mapping relationship between modulation symbols and sub-carriers in each HARQ transmission;
• a demodulation module for demodulating modulated symbols to output data bits;
• a de-interleaver for de-interleaving the data bits;
• a module for priorities for modulated symbol locations according to symbol-to-sub-carrier mapping schemes adopted in a transmission process;
• a bit de-sorting module for specifying a number of system bits, same parity bits, and surplus parity bits according to an applied HARQ mechanism and slotting scheme in each HARQ transmission, and sequentially reading a corresponding number of data bits from corresponding symbol locations using an input of the module for setting priorities for modulated symbol locations;
• and
• a HARQ module for performing soft combination and decoding to data packets of each transmission, and generating a response message according to a result of the decoding,
• wherein a modulated symbol bears a higher priority, if an average interval between sub-carriers adopted for the symbol's transmission in the transmission process is longer, and the modulated symbol bears a lower priority, if the average interval between the sub-carriers adopted for the symbol's transmission in the transmission process is shorter.