HARQ feedback channel indexing scheme in wireless communication systems

1. A method to perform hybrid automatic repeat request (HARQ) indexing, the method comprising:

transmitting a non-user-specific advanced map (A-MAP) comprising a HARQ feedback index parameter (HFIP) to a mobile station in a first sub-frame, wherein the A-MAP contains unicast service control information;

transmitting an assignment A-MAP comprising a partial HARQ feedback A-MAP (HF-A-MAP) index to the mobile station in the first sub-frame;

receiving uplink data in a second sub-frame from the mobile station according to scheduling in the assignment A-MAP targeted for the mobile station; and

calculating a full HARQ feedback index using both the HFIP and the partial HARQ feedback A-MAP index by calculating (P(j)+n)mod N HF-A-MAP , (where j is the value found in the HFIP, P(j) is a function of j, n is the value found in the partial HF-A-MAP index, and N HF-A-MAP is the total number of HF-A-MAPs configured.

2. The method of claim 1 , solving the equation, (P(j)+n)mod N HF-A-MAP , further comprising:

calculating , wherein set {m i } is selected base on the value j.

3. The method of claim 2 , wherein one transmission parameter is selected as a baseline parameter, wherein the baseline parameter is used to calculate the HARQ feedback channel index.

4. The method of claim 2 , wherein no transmission parameter is selected as a baseline parameter.

5. The method of claim 1 , solving the equation, (P(j)+n)mod N HF-A-MAP , further comprising:

calculating P(j)=TP>>(j* sf), wherein sf is a scaling factor and TP is a transmission parameter.

6. A method to perform hybrid automatic repeat request (HARQ) indexing, the method comprising:

receiving a non-user-specific advanced map (A-MAP) comprising a HARQ feedback index parameter (HFIP) from a base station in a first sub-frame, wherein the A-MAP contains unicast service control information;

receiving an assignment A-MAP comprising a partial HARQ feedback A-MAP (HF-A-MAP) index from the base station in the first sub-frame;

transmitting uplink data in a second sub-frame to the base station according to scheduling in the assignment A-MAP; and

calculating a full HARQ feedback index using both the HFIP and the partial HARQ feedback A-MAP index as follows:

calculating (P(j)+n)mod N HF-A-MAP ,where j is the value found in the HFIP, P(j) is a function of j, n is the value found in the partial HF-A-MAP index, and N HF-A-MAP is the total number of HF-A-MAPs configured.

7. The method of claim 6 , solving the equation, (P(j)+n)mod N HF-A-MAP , further comprising:

calculating , wherein set {m i } is selected base on the value j.

8. The method of claim 7 , wherein one transmission parameter is selected as a baseline parameter, wherein the baseline parameter is used to calculate the HARQ feedback channel index.

9. The method of claim 7 , wherein no transmission parameter is selected as a baseline parameter.

10. The method of claim 6 , solving the equation, (P(j) +n)mod N HF-A-MAP , further comprising:

calculating P(j)=TP>>(j* sf), wherein sf is a scaling factor and TP is a transmission parameter.

11. A system to calculate a hybrid automatic repeat request (HARQ) feedback channel index, the system comprising:

a non-user-specific advanced map controller comprising a HARQ feedback index parameter (HFIP); and

an assignment advanced map controller comprising a partial HARQ advanced map (HF-A-MAP) index;

wherein a full HARQ feedback channel index is obtained from the HFIP and the partial HF-A-MAP index using the following formula:

(P(j)+n)mod N HF-A-MAP ,

wherein j is the value found in the HFIP, P(j) is a function of j, n is the value found in the partial HF-A-MAP index, and N HF-A-MAP is the total number of HF-A-MAPs configured.

12. The system of claim 11 , wherein the HFIP is a two-bit value.

13. The system of claim 11 , wherein there are multiple transmission parameters and the HFIP indicates a subset of transmission parameters to use to calculate the full HARQ feedback channel index.

14. The system of claim 13 , wherein one of the subset of transmission parameters is a baseline parameter and the HFIP indicates a subset of the remaining transmission parameters to use, along with the baseline parameter, to calculate the full HARQ feedback channel index.

15. The system of claim 11 , wherein a single transmission parameter is used to calculate the full HARQ feedback channel index and the HFIP indicates what portion of the single transmission parameter is used to perform the calculation.

16. The system of claim 11 , wherein the full HARQ feedback channel index is obtained by performing a right-shifting operation on the HFIP.

17. The system of claim 11 , wherein the full HARQ feedback channel index is obtained using a scaling factor.