FLEXIBLE TRANSMISSIONS ON ONE OR MORE FREQUENCY DIVISION DUPLEXING RESOURCES

• US 20170310435A1
• Filed: 08/12/2015
• Published: 10/26/2017
• Est. Priority Date: 09/08/2014
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: WEI, Chao, Gaal, Peter, Chen, Wanshl, Xu, Hao, Hou, Jilei, Wang, Neng
• Granted Patent: US 11,139,931 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04W 16/06 Hybrid resource partitioning, e.g. channel borrowing
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks

Abstract

Methods, systems, and apparatuses are described for flexible transmissions on one or more frequency division duplexing resources. In some aspects, a subset of resources originally allocated for transmissions in a frequency division duplex (FDD) mode of operation associated with a first base station is identified for reallocation, and the identified subset of resources is reallocated to transmissions in a time division duplex (TDD) mode of operation, for example, associated with a second base station.

Claims

1. A method for wireless communication by a network entity, comprising:

identifying for reallocation a subset of resources originally allocated for transmissions in a frequency division duplex (FDD) mode of operation associated with a first base station; and

reallocating the identified subset of resources for transmissions in a time division duplex (TDD) mode of operation associated with a second base station.

2. The method of claim 1, wherein the second base station comprises a pico eNodeB operating on a same carrier frequency as the first base station.

3. The method of claim 1, wherein the identified subset of resources comprises a center portion of an FDD mode uplink (UL) bandwidth;

wherein the transmissions in the TDD mode of operation associated with the second base station are TDD mode downlink (DL) transmissions.

4. The method of claim 1, wherein the identified subset of resources originally allocated for transmissions in the FDD mode of operation associated with the first base station corresponds to one or more physical uplink shared channel (PUSCH) resources.

5. The method of claim 4, further comprising:

employing one or more guard bands to separate remaining uplink (UL) resources allocated for transmissions in the FDD mode of operation associated with the first base station from the identified subset of resources.

6. The method of claim 1, wherein reallocating the identified subset of resources for transmissions in the TDD mode of operation associated with the second base station comprises reallocating the identified subset of resources for downlink (DL) transmissions in the TDD mode of operation associated with the second base station.

7. The method of claim 1, further comprising:

dynamically reallocating additional resources originally allocated for uplink (UL) transmissions in the FDD mode of operation associated with the first base station for downlink (DL) transmissions in the TDD mode of operation associated with the second base station based on a changing traffic demand.

8. The method of claim 1, further comprising:

transmitting control signaling to a user equipment (UE) that is to receive data via the reallocated subset of resources.

9. The method of claim 8, wherein the control signaling is transmitted using at least one of radio resource control (RRC) signaling and L1 signaling.

10. The method of claim 1, further comprising:

causing at least one of CRS, CSI-RS, PDCCH or PDSCH of the second base station to be mapped to the reallocated subset of resources.

11. The method of claim 1, wherein the subset of resources originally allocated for transmissions in the FDD mode of operation associated with the first base station comprises a plurality of reserved subframes, and the identified subset of resources comprises a subset of the plurality of reserved subframes.

12. The method of claim 11, wherein the reserved subframes correspond to almost blank subframes (ABS) associated with the first base station.

13. The method of claim 11, wherein one or more portions of the identified subset of resources are reallocated based on at least one of a period of time, uplink (UL) control requirements, UL traffic requirements, downlink (DL) control requirements, DL traffic requirements, and quality of service requirements.

14. The method of claim 1, wherein the identified subset of resources originally allocated for transmissions in the FDD mode of operation associated with the first base station includes one or more symbols associated with an uplink (UL) subframe originally allocated for transmissions associated with the first base station.

15. The method of claim 14, wherein the identified subset of resources originally allocated for transmissions in the FDD mode of operation associated with the first base station includes one or more symbols associated with one UL subframe, the identifying and reallocating are performed on a subframe-by-subframe basis, and the reallocating is based on at least one of UL control requirements, UL traffic requirements, DL control requirements, DL traffic requirements, and quality of service requirements.

16. The method of claim 1, wherein the reallocated subset of resources for the transmissions from the second base station forms an extension carrier of a secondary component carrier for use with a legacy carrier.

17. The method of claim 1, wherein the second base station comprises an eNodeB operating on adjacent carrier frequency as the first base station, and the reallocation is based on a desired guard band to separate transmissions associated with the second base station in a TDD mode of operation from transmissions associated with the first base station.

18. The method of claim 1, wherein the second base station comprises an eNodeB operating on the same carrier frequency as the first base station or an eNodeB operating on an adjacent carrier frequency as the first base station.

19. An apparatus for wireless communication, comprising:

a processor;

memory in electronic communication with the processor; and

one or more instructions stored in the memory, the one or more instructions being executable by the processor to;

identify for reallocation a subset of resources originally allocated for transmissions in a frequency division duplex (FDD) mode of operation associated with a first base station; and

reallocate the identified subset of resources for transmissions in a time division duplex (TDD) mode of operation associated with a second base station.

20. The apparatus of claim 19, wherein the identified subset of resources comprises a center portion of an FDD mode uplink (UL) bandwidth;

wherein the transmissions associated with the second base station in the TDD mode of operation are TDD mode downlink (DL) transmissions.

21. The apparatus of claim 19, wherein the identified subset of resources originally allocated for transmissions associated with the first base station in the FDD mode of operation corresponds to one or more physical uplink shared channel (PUSCH) resources.

22. The apparatus of claim 21, wherein the memory further comprises one or more instructions being executable by the processor to:

employ one or more guard bands to separate remaining uplink (UL) resources allocated for transmissions in the FDD mode of operation associated with the first base station from the identified subset of resources.

23. The apparatus of claim 19, wherein the one or more instructions for reallocating the identified subset of resources for transmissions in the time division duplex (TDD) mode of operation associated with the second base station comprise one or more instructions for reallocating the identified subset of resources for downlink (DL) transmissions in the time division duplex (TDD) mode of operation associated with the second base station.

24. The apparatus of claim 19, wherein the memory further comprises one or more instructions being executable by the processor to:

transmit control signaling to a user equipment (UE) that is to receive data via the reallocated subset of resources.

25. The apparatus of claim 19, wherein the subset of resources originally allocated for transmissions in the FDD mode of operation associated with the first base station comprise a plurality of reserved subframes, and the identified subset of resources comprises a subset of the plurality of reserved subframes.

26. The apparatus of claim 25, wherein the memory further comprises one or more instructions being executable by the processor to:

reallocate the identified subset of resources based on at least one of a period of time, uplink (UL) control requirements, UL traffic requirements, downlink (DL) control requirements, DL traffic requirements, and quality of service requirements.

27. The apparatus of claim 19, wherein the identified subset of resources originally allocated for transmissions in the FDD mode of operation associated with the first base station includes one or more symbols associated with an uplink (UL) subframe originally allocated for transmissions associated with the first base station.

28. A method for wireless communication by a user equipment (UE), comprising:

receiving control signaling regarding reallocation of resources originally allocated for uplink (UL) transmissions associated with a first base station from the UE in a frequency division duplex (FDD) mode of operation; and

receiving downlink transmissions from a second base station via reallocated resources in a time division duplex (TDD) mode of operation.

29. The method of claim 28, wherein the resources originally allocated for UL transmissions associated with the first base station from the UE in the FDD mode of operation comprise a center portion of a UL bandwidth for FDD UL transmissions to the first base station from the UE.

30. An apparatus for wireless communication, comprising:

a processor;

memory in electronic communication with the processor; and

one or more instructions stored in the memory, the one or more instructions being executable by the processor to;

receive control signaling regarding reallocation of resources originally allocated for uplink (UL) transmissions associated with a first base station from the UE in a frequency division duplex (FDD) mode of operation; and

receive downlink transmissions from a second base station via reallocated resources in a time division duplex (TDD) mode of operation.