Decoupled mode for a common uplink burst transmission in a time division duplex subframe structure

1. A method operable at a subordinate entity for wireless communication over a time division duplex (TDD) carrier, the method comprising:

transmitting an uplink burst within a downlink-centric subframe and an uplink-centric subframe on the TDD carrier, wherein the uplink burst comprises:

a first symbol comprising a sounding reference signal (SRS) configured to enable sounding of the TDD carrier; and

a second symbol comprising information bits and a demodulation reference signal (DM-RS), wherein the DM-RS is configured to enable demodulation of the information bits carried within the second symbol.

2. The method of claim 1 , further comprising:

applying a first precoding matrix to the SRS; and

applying a second precoding matrix, different from the first precoding matrix, to the DM-RS.

3. The method of claim 1 , further comprising:

applying a scrambling code to the SRS, the scrambling code configured to enable code division multiple access (CDMA) among a plurality of subordinate entities.

4. The method of claim 1 , wherein the first symbol of the uplink burst is configured with a single carrier waveform; and

wherein the second symbol of the uplink burst is configured with an orthogonal frequency division multiple access (OFDMA) waveform comprising a plurality of subcarriers.

5. The method of claim 4 , wherein the TDD carrier comprises a plurality of resource blocks, each resource block comprising time-frequency resources including a set of subcarriers;

wherein the SRS in the first symbol of the uplink burst spans all of the subcarriers within a resource block on the TDD carrier; and

wherein the second symbol of the uplink burst further comprises a control region spanning a first portion of the subcarriers within the resource block on the TDD carrier, the first portion of the subcarriers being less than all of the subcarriers.

6. The method of claim 5 , wherein the second symbol of the uplink burst further comprises a data region spanning a second portion of the subcarriers within the resource block of the TDD carrier, first portion and the second portion together being less than or equal to all of the subcarriers.

7. The method of claim 6 , wherein the control region comprises a scheduling request (SR) configured to request from a scheduling entity an allocation of time-frequency resources in a subsequent uplink burst, the method further comprising:

receiving a scheduling grant from the scheduling entity in response to the SR, the scheduling grant indicating a grant of the time-frequency resources in the subsequent uplink burst.

8. The method of claim 7 , further comprising transmitting the subsequent uplink burst in one of an uplink-centric subframe or a downlink-centric subframe on the TDD carrier, the subsequent uplink burst comprising data information utilizing the granted time-frequency resources.

9. A subordinate entity configured for wireless communication over a time division duplex (TDD) carrier, comprising:

a processor;

a memory communicatively coupled to the processor; and

a transceiver communicatively coupled to the processor,

wherein the processor and the memory are configured to:

transmit an uplink burst within a downlink-centric subframe and an uplink-centric subframe on the TDD carrier, wherein the uplink burst comprises:

a first symbol comprising a sounding reference signal (SRS) configured to enable sounding of the TDD carrier; and

a second symbol comprising information bits and a demodulation reference signal (DM-RS), wherein the DM-RS is configured to enable demodulation of the information bits carried within the second symbol.

10. The subordinate entity of claim 9 , wherein the processor and the memory are further configured to:

apply a first precoding matrix to the SRS; and

apply a second precoding matrix, different from the first precoding matrix, to the DM-RS.

11. The subordinate entity of claim 9 , wherein the processor and the memory are further configured to:

apply a scrambling code to the SRS, the scrambling code configured to enable code division multiple access (CDMA) among a plurality of subordinate entities.

12. The subordinate entity of claim 9 ,

wherein the first symbol of the uplink burst is configured with a single carrier waveform; and

wherein the second symbol of the uplink burst is configured with an orthogonal frequency division multiple access (OFDMA) waveform comprising a plurality of subcarriers.

13. The subordinate entity of claim 12 ,

wherein the TDD carrier comprises a plurality of resource blocks, each resource block comprising time-frequency resources including a set of subcarriers;

wherein the SRS in the first symbol of the uplink burst spans all of the subcarriers within a resource block on the TDD carrier; and

wherein the second symbol of the uplink burst further comprises a control region spanning a first portion of the subcarriers within the resource block on the TDD carrier, the first portion of the subcarriers being less than all of the subcarriers.

14. The subordinate entity of claim 13 , wherein the second symbol of the uplink burst further comprises a data region spanning a second portion of the subcarriers within the resource block of the TDD carrier, first portion and the second portion together being less than or equal to all of the subcarriers.

15. The subordinate entity of claim 14 , wherein the control region comprises a scheduling request (SR) configured to request from a scheduling entity an allocation of time-frequency resources in a subsequent uplink burst,

wherein the processor and the memory are further configured to:

receive a scheduling grant from the scheduling entity in response to the SR, the scheduling grant indicating a grant of the time-frequency resources in the subsequent uplink burst.

16. The subordinate entity of claim 15 , wherein the processor and the memory are further configured to:

transmit the subsequent uplink burst in one of an uplink-centric subframe or a downlink-centric subframe on the TDD carrier, the subsequent uplink burst comprising data information utilizing the granted time-frequency resources.

17. A subordinate entity configured for wireless communication over a time division duplex (TDD) carrier, comprising:

means for transmitting an uplink burst within a downlink-centric subframe on the TDD carrier; and

means for transmitting the uplink burst within an uplink-centric subframe on the TDD carrier,

wherein the uplink burst comprises:

a first symbol comprising a sounding reference signal (SRS) configured to enable sounding of the TDD carrier; and

a second symbol comprising information bits and a demodulation reference signal (DM-RS), wherein the DM-RS is configured to enable demodulation of the information bits carried within the second symbol.

18. The subordinate entity of claim 17 , further comprising:

means for applying a first precoding matrix to the SRS; and

means for applying a second precoding matrix, different from the first precoding matrix, to the DM-RS.

19. The subordinate entity of claim 17 , wherein the TDD carrier comprises a plurality of resource blocks, each resource block comprising time-frequency resources including a set of subcarriers;

wherein the SRS in the first symbol of the uplink burst spans all of the subcarriers within a resource block on the TDD carrier; and

wherein the second symbol of the uplink burst further comprises a control region spanning a first portion of the subcarriers within the resource block on the TDD carrier, the first portion of the subcarriers being less than all of the subcarriers.

20. The subordinate entity of claim 19 , wherein the second symbol of the uplink burst further comprises a data region spanning a second portion of the subcarriers within the resource block of the TDD carrier, first portion and the second portion together being less than or equal to all of the subcarriers.