METHOD AND APPARATUS FOR PROVIDING SIGNALING OF REDUNDANCY VERSIONS

• US 20100080152A1
• Filed: 09/22/2009
• Published: 04/01/2010
• Est. Priority Date: 09/22/2008
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Siemens Networks GmbH & Company KG (Nokia Corporation)
• Inventors: Chmiel, Mieszko, Frederiksen, Frank, Lindh, Lars
• Granted Patent: US 8,457,022 B2
• Time in Patent Office: Days
• US Class Current: 370/280
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

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.

Claims

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.

2. A method of claim 1, wherein the assignment includes excluding one or more predetermined subframes in even-numbered radio frames if the subframes are within the transmission window.

3. A method of claim 1, wherein the assignment includes excluding uplink subframes.

4. A method of claim 1, further comprising:

determining whether the subframes are a mixture of multi-cast subframes and unicast subframes,

wherein the assignment includes excluding the multi-cast subframes.

5. A 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.

6. A method of claim 5, 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.

7. A 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.

8. A method of claim 1, wherein the assignment ensures the redundancy version sequence is continuous over adjacent radio frames, and wherein the redundancy version sequence is calculated according to

${\mathrm{RV}}_k=\lceil$

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.

9. 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.

10. An apparatus of claim 9, wherein the assignment includes excluding one or more predetermined subframes in even-numbered radio frames if the subframes are within the transmission window.

11. An apparatus of claim 9, wherein the assignment includes excluding uplink subframes.

12. An apparatus of claim 9, wherein the redundancy version signaling module is further configured to:

determine whether the subframes are a mixture of multi-cast subframes and unicast subframes, wherein the assignment includes excluding the multi-cast subframes.

13. An apparatus of claim 9, 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.

14. An apparatus of claim 13, 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.

15. An apparatus of claim 9, wherein the subframes are a part of radio frames that utilize either time division duplex (TDD) carriers or frequency division duplex (FDD) carriers.

16. An apparatus of claim 9, wherein the assignment ensures the redundancy version sequence is continuous over adjacent radio frames, and wherein the redundancy version sequence is calculated according to

${\mathrm{RV}}_k=\lceil$

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.

17. A 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.

18. A computer-readable storage medium of claim 17, 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

${\mathrm{RV}}_k=\lceil$

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.

19. A computer-readable storage medium of claim 17, 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.

20. A computer-readable storage medium of claim 17, 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.