IP Library Granted Patent US 10,123,344
Granted Patent B2
US 10,123,344 · App. 14/163,874 · Granted Nov 6, 2018

Methods and apparatus for multi-subframe scheduling

Inventors: Wanshi Chen (San Diego, CA); Tao Luo (San Diego, CA); Peter Gaal (San Diego, CA); Aleksandar Damnjanovic (San Diego, CA)
Assignee: QUALCOMM Incorporated
H04W72/12H04L5/0058H04W72/1205H04L1/0003H04L1/0007H04L1/0009H04W72/1289
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Quick Facts
Patent No.
US 10,123,344
App. No.
14/163,874
Granted
Nov 6, 2018
Kind
B2
Abstract

Methods, systems, and devices are described for scheduling transmissions for multiple subframes in a single scheduling operation. Scheduling information is provided in a multi-subframe scheduling information transmission for a set of subframes. Differences in characteristics for subframes under the multi-subframe information are determined, and one or more properties for communication during the one or more subframes may be adjusted based on subframe characteristics. Such multi-subframe scheduling may allow for reduced overhead for scheduling uplink or downlink transmissions.

Claims (116)

1. A method of wireless communication performed by a user equipment (UE), comprising:

receiving, in a first subframe, multi-subframe scheduling information for a set of subframes;

determining differences in characteristics for one or more subframes of the set of subframes based on the multi-subframe scheduling information; and

adjusting one or more properties for communication during the one or more subframes responsive to the determination, wherein the one or more properties are distinct from the characteristics; and

transmitting data during at least one of the one of more subframes, wherein the transmitting is distinct from the adjusting.

2. The method of claim 1 , wherein determining the differences in characteristics comprises determining that a subframe of the set of subframes has one or more of:

different available resource blocks (RBs) from the first subframe;

a collision condition with one of: a primary synchronization signal, a secondary synchronization signal, a primary broadcast channel, a common reference signal, a positioning reference signal, or a channel state information reference signal;

a subframe type different from a subframe type of the first subframe, the subframe type comprising one of: a multicast broadcast single frequency network (MBSFN) downlink subframe, a non-MBSFN subframe, a special subframe, or an almost blank subframe;

a type indication that disallows physical downlink shared channel (PDSCH) or physical uplink shared channel (PUSCH) transmission; or

a semi-persistent scheduling (SPS) assignment.

3. The method of claim 1 , wherein adjusting one or more properties for communication during the one or more subframes comprises adjusting one or more of:

a transport block size (TBS) of the one or more subframes relative to a transport block size of the first subframe;

a modulation and coding scheme (MCS) of the one or more subframes relative to a MCS of the first subframe;

a rank of the one or more subframes relative to a rank of the first subframe; or

transmission resources based on a punctured demodulation reference signal (DM-RS) pattern.

4. The method of claim 1 , wherein

the determining comprises determining that a second subframe has a different number of available resource elements (REs) for transmission from the first subframe; and

wherein the adjusting comprises adjusting a transport block size (TBS) of the second subframe based at least in part on the number of available REs of the second subframe.

5. The method of claim 1 , wherein

the determining comprises determining that a number of available resource blocks (RBs) for a second subframe is different from a number of available RBs for the first subframe; and

wherein the adjusting comprises adjusting a resource allocation associated with the second subframe.

6. The method of claim 1 , wherein

the determining comprises determining that a second subframe has a semi-persistently scheduled transmission; and

wherein the adjusting comprises skipping a scheduling of resources associated with the multi-subframe scheduling information for the second subframe.

7. The method of claim 1 , further comprising:

receiving different scheduling information subsequent to receiving the multi-subframe scheduling information, the different scheduling information being for one of the set of subframes; and

replacing the multi-subframe scheduling information with the different scheduling information.

8. The method of claim 1 , further comprising:

ignoring scheduling information for the set of subframes that is received after the receipt of the multi-subframe scheduling information.

9. A wireless communication user equipment apparatus, comprising:

a processor configured to:

receive, in a first subframe, multi-subframe scheduling information for a set of subframes;

determine differences in characteristics for one or more subframes of the set of subframes based on the multi-subframe scheduling information; and

adjust one or more properties for communication during the one or more subframes responsive to the determination, wherein the one or more properties are distinct from the characteristics; and

transmitting data during at least one of the one of more subframes, wherein the transmitting is distinct from the adjusting.

10. The apparatus of claim 9 , wherein the processor is further configured to determine that a subframe of the set of subframes has one or more of:

different available resource blocks (RBs) from the first subframe;

a collision condition with one of: a primary synchronization signal, a secondary synchronization signal, a primary broadcast channel, a common reference signal, a positioning reference signal, or a channel state information reference signal;

a subframe type different from a subframe type of the first subframe, the subframe type comprising one of a multicast broadcast single frequency network (MBSFN) downlink subframe, a non-MBSFN subframe, a special subframe, or an almost blank subframe;

a type indication that disallows physical downlink shared channel (PDSCH) or physical uplink shared channel (PUSCH) transmission; or

a semi-persistent scheduling (SPS) assignment.

11. The apparatus of claim 9 , wherein the processor is further configured to adjust one or more of:

a transport block size (TBS) of the one or more subframes relative to a transport block size of the first subframe;

a modulation and coding scheme (MCS) of the one or more subframes relative to a MCS of the first subframe;

a rank of the one or more subframes relative to a rank of the first subframe; or

transmission resources based on a punctured demodulation reference signal (DM-RS) pattern.

12. The apparatus of claim 9 , wherein the processor is further configured to:

determine that a second subframe has a different number of available resource elements (REs) for transmission from the first subframe; and

adjust a transport block size (TBS) of the second subframe based at least in part on the number of available REs of the second subframe.

13. The apparatus of claim 9 , wherein the processor is further configured to:

determine that a number of available resource blocks (RBs) for a second subframe is different from a number of available RBs for the first subframe; and

adjust a resource allocation associated with the second subframe.

14. The apparatus of claim 9 , wherein the processor is further configured to:

determine that a second subframe has a semi-persistently scheduled transmission; and

skip a scheduling of resources associated with the multi-subframe scheduling information for the second subframe.

15. The apparatus of claim 9 , wherein the processor is further configured to:

receive different scheduling information subsequent to receiving the multi-subframe scheduling information, the different scheduling information being for one of the set of subframes; and

replace the multi-subframe scheduling information with the different scheduling information.

16. The apparatus of claim 9 , wherein the processor is further configured to ignore scheduling information for the set of subframes that is received after the receipt of the multi-subframe scheduling information.

17. A non-transitory computer-readable medium for wireless communication by a user equipment, the non-transitory computer-readable medium comprising code for:

receiving, in a first subframe, multi-subframe scheduling information for a set of subframes;

determining differences in characteristics for one or more subframes of the set of subframes based on the multi-subframe scheduling information; and

adjusting one or more properties for communication during the one or more subframes responsive to the determination, wherein the one or more properties are distinct from the characteristics; and

transmitting data during at least one of the one of more subframes, wherein the transmitting is distinct from the adjusting.

18. The computer-readable medium of claim 17 , wherein the code for determining the differences in characteristics comprises code for determining that a subframe of the set of subframes has one or more of:

different available resource blocks (RBs) from the first subframe;

a collision condition with one of: a primary synchronization signal, a secondary synchronization signal, a primary broadcast channel, a common reference signal, a positioning reference signal, or a channel state information reference signal;

a subframe type different from a subframe type of the first subframe, the subframe type comprising one of: a multicast broadcast single frequency network (MBSFN) downlink subframe, a non-MBSFN subframe, a special subframe, or an almost blank subframe;

a type indication that disallows physical downlink shared channel (PDSCH) or physical uplink shared channel (PUSCH) transmission; or

a semi-persistent scheduling (SPS) assignment.

19. The computer-readable medium of claim 17 , wherein the code for adjusting one or more properties for communication during the one or more subframes comprises code for adjusting one or more of:

a transport block size (TBS) of the one or more subframes relative to a transport block size of the first subframe;

a modulation and coding scheme (MCS) of the one or more subframes relative to a MCS of the first subframe;

a rank of the one or more subframes relative to a rank of the first subframe; or

transmission resources based on a punctured demodulation reference signal (DM-RS) pattern.

20. The computer-readable medium of claim 17 , wherein

the code for determining the differences in characteristics comprises code for determining that a second subframe has a different number of available resource elements (REs) for transmission from the first subframe; and

wherein the adjusting comprises adjusting a transport block size (TBS) of the second subframe based at least in part on the number of available REs of the second subframe.

21. The computer-readable medium of claim 17 , wherein

the code for determining the differences in characteristics comprises code for determining that a number of available resource blocks (RBs) for a second subframe is different from a number of available RBs for the first subframe; and

wherein the code for adjusting comprises code for adjusting a resource allocation associated with the second subframe.

22. The computer-readable medium of claim 17 , wherein

the code for determining the differences in characteristics comprises code for determining that a second subframe has a semi-persistently scheduled transmission; and

wherein the code for adjusting comprises code for skipping a scheduling of resources associated with the multi-subframe scheduling information for the second subframe.

23. The computer-readable medium of claim 17 further comprises code for:

receiving different scheduling information subsequent to receiving the multi-subframe scheduling information, the different scheduling information being for one of the set of subframes; and

replacing the multi-subframe scheduling information with the different scheduling information.

24. A method of wireless communication performed by a node in communication with a user equipment (UE), comprising:

determining differences in characteristics for one or more subframes of a set of subframes associated with a multi-subframe scheduling assignment;

adjusting multi-subframe scheduling information for the set of subframes based on the differences;

receiving data during at least one of the one of more subframes, wherein the receiving is distinct from the adjusting; and

transmitting the multi-subframe scheduling information to a UE.

25. The method of claim 24 , wherein determining the differences in characteristics comprises determining that a subframe of the set of subframes has one or more of:

different available resource blocks (RBs) from the first subframe;

a collision condition with a primary synchronization signal, a secondary synchronization signal, a primary broadcast channel, a common reference signal, a positioning reference signal, or a channel state information reference signal;

a subframe type that is different from a subframe type of the first subframe, the subframe type comprising one of: a multicast broadcast single frequency network (MBSFN) downlink subframe, a non-MBSFN subframe, a special subframe, or an almost blank subframe;

a type indication that disallows physical downlink shared channel (PDSCH) or physical uplink shared channel (PUSCH) transmission; or

a semi-persistent scheduling (SPS) assignment.

26. The method of claim 24 , wherein adjusting scheduling information for the one or more subframes of the set of subframes comprises adjusting one or more of:

a transport block size (TBS) of the one or more subframes relative to a transport block size of the first subframe;

a modulation and coding scheme (MCS) of the one or more subframes relative to a MCS of the first subframe;

a rank of the one or more subframes relative to a rank of the first subframe; or

transmission resources based on a punctured demodulation reference signal (DM-RS) pattern.

27. The method of claim 24 , wherein

the determining comprises identifying one of the set of subframes having a different number of available resource elements from other subframes of the set of subframes; and

wherein the adjusting comprises adjusting a transport block size (TBS) of the identified subframe based at least in part on a number of available resource elements of the identified subframe.

28. The method of claim 24 , wherein

the determining comprises identifying that a number of available resource blocks (RBs) for one of the set of subframes is different from a number of available RBs for one or more other subframes of the set of subframes; and

wherein the adjusting comprises adjusting a resource allocation associated with the identified subframe.

29. The method of claim 24 , wherein

the determining comprises identifying one or more subframes of the set of subframes having a semi-persistently scheduled transmission; and

wherein the adjusting comprises skipping a scheduling of resources associated with the multi-subframe scheduling information for the one or more identified subframes.

30. The method of claim 24 , wherein

the determining comprises identifying one or more subframes of the set of subframes having a semi-persistently scheduled transmission; and

wherein the adjusting comprises skipping the semi-persistently scheduled transmission and scheduling resources associated with the multi-subframe scheduling information for the one or more identified subframes.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 25, 2014
From: CHEN, WANSHI; LUO, TAO; GAAL, PETER; DAMNJANOVIC, ALEKSANDAR
To: QUALCOMM INCORPORATED
Reel/Frame 032522/0315 →
Continuity (2)
Provisional Application 61773626 · Mar 6, 2013
Related Publication 20140254509A1 · Sep 11, 2014