Method and apparatus for providing signaling of redundancy versions
View Patent ↗An approach is provided for efficient signaling of redundancy version information. A redundancy version signaling module detects the start of a system information radio transmission window and assigns a redundancy version sequence at the start of the transmission window.
1. A method comprising:
detecting start of a system information message transmission window; and
assigning a redundancy version sequence at the start of the transmission window,
wherein the assignment includes excluding one or more of the predetermined subframes in even-numbered radio frames if the subframes are within the transmission window, and
wherein the assignment includes excluding uplink subframes and multi-cast subframes, and
wherein the assignment ensures the redundancy version sequence is continuous over adjacent radio frames, and wherein the redundancy version sequence is calculated according to
RV
k
=
⌈
3
2
k
⌉
mod
4
,
where RV k is the redundanc version sequence, k=i mod 4, i=0,1, . . . ,n s w −1, and n s w denotes a number of subframes within the system information message transmission window.
2. The method of claim 1 , further comprising:
determining whether the subframes are a mixture of multi-cast subframes and unicast subframes.
3. The method of claim 1 , further comprising:
determining available control capacity;
tracking the redundancy version sequence with a system information message transmission window; and
scheduling transmission of a broadcast control channel signal based on the available control capacity to obtain an optimal redundancy version sequence.
4. The method of claim 3 , wherein the optimal redundancy version sequence is obtained at the start of the system information message transmission window, and the optimal redundancy version sequence either reduces a-signal-to-noise ratio, enables quicker acquisition of the broadcast control channel signal, reduces power consumption, or a combination thereof.
5. The method of claim 1 , wherein the subframes are a part of radio frames that utilize either time division duplex (TDD) carriers or frequency division duplex (FDD) carriers.
6. An apparatus comprising:
a redundancy version signaling module configured to detect start of a system information message transmission window and to assign a redundancy version sequence at the start of the transmission window, wherein the assignment includes excluding one or more of the predetermined subframes in even-numbered radio frames if the subframes are within the transmission window, and wherein the assignment includes excluding uplink subframes and multi-cast subframes,
wherein the assignment ensures the redundancy version sequence is continuous over adjacent radio frames, and wherein the redundancy version sequence is calculated according to
RV
k
=
⌈
3
2
k
⌉
mod
4
,
where RV k is the redundanc version sequence k=i mod 4, i=0,1, . . . , i=0,1, . . . , n s w −1, and n s w denotes a number of subframes within the system information message transmission window.
7. The apparatus of claim 6 , wherein the redundancy version signaling module is further configured to:
determine whether the subframes are a mixture of multi-cast subframes and unicast subframes.
8. The apparatus of claim 6 , wherein the redundancy version signaling module is further configured to:
determine available control capacity;
track transmitted redundancy version sequence with a system information message transmission window; and
schedule transmission of a broadcast control channel signal based on the available control capacity to obtain an optimal redundancy version sequence.
9. The apparatus of claim 8 , wherein the optimal redundancy version sequence is obtained at the start of the system information message transmission window, and the optimal redundancy version sequence either reduces a-signal-to-noise ratio, enables quicker acquisition of the broadcast control channel signal, reduces power consumption, or a combination thereof.
10. The apparatus of claim 6 , wherein the subframes are a part of radio frames that utilize either time division duplex (TDD) carriers or frequency division duplex (FDD) carriers.
11. A non-transitory computer-readable storage medium carrying one or more sequences of one or more instructions which, when executed by one or more processors, cause an apparatus to perform:
detecting start of a system information message transmission window; and
assigning a redundancy version sequence at the start of the transmission window,
wherein the assignment includes excluding one or more predetermined subframes in even-numbered radio frames if the subframes are within the transmission window and excluding uplink subframes, and wherein the redundancy version sequence is calculated according to
RV
k
=
⌈
3
2
k
⌉
mod
4
,
where RV k is the redundancy version sequence, k=i mod 4, i=0,1, . . . , n s w −1, and n s w denotes a number of subframes within the system information message transmission window.
12. The non-transitory computer-readable storage medium of claim 11 , wherein the apparatus is caused to further perform:
determining whether the subframes are a mixture of multi-cast subframes and unicast subframes, wherein the assignment includes excluding the multi-cast subframes.
13. The non-transitory computer-readable storage medium of claim 11 , wherein the apparatus is caused to further perform:
determining available control capacity;
tracking the redundancy version sequence with a system information message transmission window; and
scheduling transmission of a broadcast control channel signal based on the available control capacity to obtain an optimal redundancy version sequence.