Method of enabling HARQ, network entity and computer program
An approach for transmission provides a method of enabling Hybrid Automatic Request, HARQ, in an IEEE 802.11 communication. The method includes transmitting, in an element in a Block Acknowledgement, BA, setup of a Medium Access Control, MAC, message, which element indicates a request to use HARQ, receiving a response to said request, and starting to apply HARQ. The approach includes a network entity of a wireless network using IEEE 802.11. The network entity includes a transmitter arranged to transmit, in an element in a Block Acknowledgement, BA, setup of a Medium Access Control, MAC, message, which element indicates a request to use HARQ, a receiver arranged to receive a response to said request, and a communication handler arranged to start to apply HARQ.
1. A method of enabling Hybrid Automatic Request, HARQ, in an IEEE 802.11 communication, the method comprising:
transmitting, in an element in a Block Acknowledgement, BA, setup of a Medium Access Control, MAC, message, which element indicates a request to use HARQ;
receiving a response to the request;
starting to apply HARQ; and
bits of a BA bitmap in a NACK during application of HARQ indicating which codewords are erroneously received, and a fragment subfield in the BA being remapped to a codeword identifier subfield, the BA bitmap having a 1-to-N mapping, each bit of the BA bitmap corresponding to a segment of N codewords, where N is an integer corresponding to a minimum number of codewords of a retransmission.
2. The method of claim 1 , wherein the response comprises at least one of:
BA type;
buffer size; and
BA timeout value for the sequence.
3. The method of claim 2 , wherein bits of a BA bitmap in a NACK during application of HARQ indicate which codewords are erroneously received.
4. The method of claim 2 , wherein the BA bitmap has varying size and indicates respective segment numbers for segments with an erroneous reception.
5. The method of claim 2 , wherein the BA bitmap indicates a first and a last segment of a series of segments with erroneous reception.
6. The method of claim 1 , wherein N is a variable for different codeword segments in a multi-layer transmission enabling variable preciseness in reporting.
7. The method of claim 1 , wherein the BA bitmap has varying size and indicates respective segment numbers for segments with an erroneous reception.
8. The method of claim 1 , wherein the BA bitmap indicates a first and a last segment of a series of segments with erroneous reception.
9. The method of claim 1 , wherein a header of a MAC Service Data Unit subframe contains a redundancy version, RV, for incremental redundancy at repeated transmission.
10. A network entity of a wireless network using IEEE 802.11, the network entity comprising:
a transmitter arranged to transmit, in an element in a Block Acknowledgement, BA, setup of a Medium Access Control, MAC, message, which element indicates a request to use HARQ;
a receiver arranged to receive a response to the request; and
a communication handler arranged to start to apply HARQ, bits of a BA bitmap in a NACK during application of HARQ indicating which codewords are erroneously received, and a fragment subfield in the BA being remapped to a codeword identifier subfield, the BA bitmap having a 1-to-N mapping, each bit of the BA bitmap corresponding to a segment of N codewords, where N is an integer corresponding to a minimum number of codewords of a retransmission.
11. The network entity of claim 10 , wherein the response comprises at least one of:
BA type;
buffer size; and
BA timeout value for the sequence.
12. The network entity of claim 10 , wherein N is a variable for different codeword segments in a multi-layer transmission enabling variable preciseness in reporting.
13. The network entity of claim 10 , wherein the BA bitmap has varying size and indicates respective segment numbers for segments with an erroneous reception.
14. The network entity of claim 10 , wherein the BA bitmap indicates a first and a last segment of a series of segments with erroneous reception.
15. The network entity of claim 10 , wherein a header of a MAC Service Data Unit subframe contains a redundancy version, RV, for incremental redundancy at repeated transmission.
16. A non-transitory computer storage medium providing non-transitory storage of a computer program comprising instructions, which when executed on a processor of a network entity causes the network entity to perform a method of enabling Hybrid Automatic Request, HARQ, in an IEEE 802.11 communication, the method comprising:
transmitting, in an element in a Block Acknowledgement, BA, setup of a Medium Access Control, MAC, message, which element indicates a request to use HARQ;
receiving a response to the request; and
starting to apply HARQ; and
bits of a BA bitmap in a NACK during application of HARQ indicating which codewords are erroneously received, and a fragment subfield in the BA being remapped to a codeword identifier subfield, the BA bitmap having a 1-to-N mapping, each bit of the BA bitmap corresponding to a segment of N codewords, where N is an integer corresponding to a minimum number of codewords of a retransmission.