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US 7,397,861 B2Granted
Mapping strategy for OFDM-based systems using H-ARQ
AssigneeNokia Corporation
InventorsFrank Frederiksen, Troels Kolding, Preben Mogensen, Akhilesh Pokhariyal
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Abstract
A wireless communication device, method and system adapted so that, in response to a repeat request indicating a communication signal (because of an error in transmission of the communication signal), the communication signal is wirelessly retransmitted using a remapping of bits into at least partially different frequencies in the retransmission compared to the original transmission.
Claims14
A method, comprising:
- receiving a repeat request indicating a previous transmission of a wireless communication signal conveying a block of a plurality of subblocks each conveying a plurality of bits, wherein each subblock is conveyed by a corresponding set of subcarriers of a carrier forming the communication signal;
- and
- retransmitting the wireless communication signal using a remapping of the bits into at least partially different frequencies in the retransmission compared to the previous transmission by retransmitting the subblocks in a different order, wherein the different order is based on a predetermined correspondence to the number of times the block has been transmitted.
An apparatus, comprising:
- means for receiving a repeat request indicating a previous transmission of a wireless communication signal conveying a block of a plurality of sub-blocks each conveying a plurality of bits, wherein each sub-block is conveyed by a corresponding set of subcarriers of a carrier forming the communication signal;
- means for retransmitting the wireless communication signal using a remapping of the bits into at least partially different frequencies in the retransmission compared to the previous transmission by remapping the subblocks in a different order compared to the previous transmission, wherein the different order is based on a predetermined correspondence to the number of times the block has been transmitted;
- and
- means for retransmitting the wireless communication signal.
1 more element
An apparatus, comprising:
- a remapping module, for receiving a repeat request indicating a previous transmission of a wireless communication signal conveying a block of a plurality of subblocks each conveying a plurality of bits, wherein each subblock is conveyed by a corresponding set of subcarriers of a carrier forming the communication signal, and for retransmitting the wireless communication signal using a remapping of the bits into at least partially different frequencies in the retransmission compared to the previous transmission by providing the subblocks for a retransmission in a different order compared to the previous transmission, based on a predetermined correspondence to the number of times the block has been transmitted.
A wireless communication terminal, comprising:
- a transmitter, for receiving a repeat request indicating a previous transmission by the wireless communication terminal of a wireless communication signal conveying a block of a plurality of sub-locks each conveying a plurality of bits, wherein each subblock is conveyed by a corresponding set of subcarriers of a carrier forming the communication signal, for retransmitting the wireless communication signal using a remapping of the bits into at least partially different frequencies in the retransmission compared to the previous transmission by providing the subblocks for retransmission in a different order based on a predetermined correspondence to the number of times the block has been transmitted by the wireless communication terminal;
- and
- a receiver, responsive to a retransmitted communication signal providing subblocks of a block in a different order compared to a previous transmission by a sending wireless communication terminal, based on a predetermined correspondence to the number of times the block has been transmitted by the sending wireless communication terminal, configured to decode the retransmitted communication signal including performing processing of the retransmitted communication signal.
Dependencies are inferred from the claim text.