Wireless communication method of selecting an enhanced uplink transport format combination by setting a scheduling grant payload to the highest payload that can be transmitted
The present invention is related to a method of selecting an enhanced uplink (EU) transport format combination (E-TFC). A scheduling grant payload (SGP) is set to the highest payload that may be transmitted. The SGP is calculated as follows: SGP = K e , ref · SG L e , ref · A ed , ref 2 · 10 Δ harq / 10 , where SG is a serving grant, L e,ref is the number of EU dedicated physical data channels (E-DPDCHs) used for a selected reference E-TFC, K e,ref is the number of data bits of the reference E-TFC, Δ harq is a hybrid automatic repeat request (HARQ) offset for a specific data flow to be transmitted as signaled by higher layers, and A ed,ref is a ratio derived from a parameter ΔE-DPDCH signaled by higher layers for the selected reference E-TFC.
1. A method of selecting an enhanced uplink (EU) transport format combination (E-TFC), the method comprising:
setting a scheduling grant payload (SGP) to the highest payload that can be transmitted, wherein the SGP is equal to:
SGP
=
SG
×
TBsize
×
β
c
2
β
ed
,
j
,
harq
2
,
where SG is a serving grant, TBsize is a transport block size that provides a maximum supported payload, β c is a gain factor of a dedicated physical control channel (DPCCH), and
β
ed
,
j
,
harq
=
β
ed
,
ref
L
e
,
ref
L
e
,
j
K
e
,
j
K
e
,
ref
·
10
Δ
harq
/
20
where L e,ref is the number of EU dedicated physical data channels (E-DPDCHs) used for a selected reference E-TFC, L e,j is the number of E-DPDCHs used for the j th E-TFC, K e,ref is the number of data bits of the reference E-TFC, K e,j is the number of data bits of the j th E-TFC, and Δ harq is a hybrid automatic repeat request (HARQ) offset for a specific data flow to be transmitted as signaled by higher layers.
2. The method of claim 1 wherein β ed,ref =β c ·A ed,ref , where A ed,ref is a ratio derived from a parameter ΔE-DPDCH signaled by higher layers for the selected reference E-TFC.
3. The method of claim 2 wherein
SGP
=
K
e
,
ref
·
SG
L
e
,
ref
·
A
ed
,
ref
2
·
10
Δ
harq
/
10
·
TBSize
·
L
e
,
j
K
e
,
j
.
4. The method of claim 3 wherein
TBSize
·
L
e
,
j
K
e
,
j
=
1.
5. A wireless transmit/receive unit (WTRU) for selecting an enhanced uplink (EU) transport format combination (E-TFC), the WTRU configured to set a scheduling grant payload (SGP) to the highest payload that can be transmitted, wherein the SGP is equal to:
SGP
=
SG
×
TBsize
×
β
c
2
β
ed
,
j
,
harq
2
,
where SG is a serving grant, TBsize is a transport block size that provides a maximum supported payload, β c is a gain factor of a dedicated physical control channel (DPCCH), and
β
ed
,
j
,
harq
=
β
ed
,
ref
L
e
,
ref
L
e
,
j
K
e
,
j
K
e
,
ref
·
10
Δ
harq
/
20
where L e,ref is the number of EU dedicated physical data channels (E-DPDCHs) used for a selected reference E-TFC, L e,j is the number of E-DPDCHs used for the j th E-TFC, K e,ref is the number of data bits of the reference E-TFC, K e,j is the number of data bits of the j th E-TFC, and Δ harq is a hybrid automatic repeat request (HARQ) offset for a specific data flow to be transmitted as signaled by higher layers.
6. The method of claim 1 wherein SG=MIN (SGP, TBsize).
7. The method of claim 1 further comprising:
selecting a dedicated channel medium access control (MAC-d) flow with a power offset (PO) that allows highest-priority data to be transmitted.
8. The method of claim 7 wherein on a condition that more than one MAC-d flow allows data of the same highest priority to be transmitted, the selection of the MAC-d flow is performed randomly.
9. The method of claim 7 further comprising:
based on the MAC-d flow selected, identifying the MAC-d flow(s) that can be multiplexed; and
ignoring the MAC-d flow(s) that cannot be multiplexed.
10. The method of claim 9 further comprising:
performing E-TFC restriction; and
determining the maximum supported payload that can be sent in a next transmission timing interval (TTI).
11. The method of claim 10 wherein the payload is set to a maximum EU medium access control (MAC) size.
12. A method of selecting an enhanced uplink (EU) transport format combination (E-TFC), the method comprising:
setting a scheduling grant payload (SGP) to the highest payload that can be transmitted, wherein the SGP is equal to:
SGP
=
K
e
,
ref
·
SG
L
e
,
ref
·
A
ed
,
ref
2
·
10
Δ
harq
/
10
,
where SG is a serving grant, L e,ref is the number of EU dedicated physical data channels (E-DPDCHs) used for a selected reference E-TFC, K e,ref is the number of data bits of the reference E-TFC, Δ harq is a hybrid automatic repeat request (HARQ) offset for a specific data flow to be transmitted as signaled by higher layers, and A ed,ref is a ratio derived from a parameter ΔE-DPDCH signaled by higher layers for the selected reference E-TFC.
13. A wireless transmit/receive unit (WTRU) for selecting an enhanced uplink (EU) transport format combination (E-TFC), the WTRU configured to set a scheduling grant payload (SGP) to the highest payload that can be transmitted, wherein the SGP is equal to:
SGP
=
K
e
,
ref
·
SG
L
e
,
ref
·
A
ed
,
ref
2
·
10
Δ
harq
/
10
,
where SG is a serving grant, L e,ref is the number of EU dedicated physical data channels (E-DPDCHs) used for a selected reference E-TFC, K e,ref is the number of data bits of the reference E-TFC, Δ harq is a hybrid automatic repeat request (HARQ) offset for a specific data flow to be transmitted as signaled by higher layers, and A ed,ref is a ratio derived from a parameter ΔE-DPDCH signaled by higher layers for the selected reference E-TFC.
14. The method of claim 12 wherein SG=MIN (SGP, TBsize), where TBsize is a transport block size that provides a maximum supported payload.
15. The method of claim 12 further comprising:
selecting a dedicated channel medium access control (MAC-d) flow with a power offset (PO) that allows highest-priority data to be transmitted.
16. The method of claim 15 wherein on a condition that more than one MAC-d flow allows data of the same highest priority to be transmitted, the selection of the MAC-d flow is performed randomly.
17. The method of claim 15 further comprising:
based on the MAC-d flow selected, identifying the MAC-d flow(s) that can be multiplexed; and
ignoring the MAC-d flow(s) that cannot be multiplexed.
18. The method of claim 17 further comprising:
performing E-TFC restriction; and
determining the maximum supported payload that can be sent in a next transmission timing interval (TTI).
19. The method of claim 18 wherein the payload is set to a maximum EU medium access control (MAC) size.