Control information piggyback in shared channel

1. A method of wireless communication, comprising, at a scheduling entity:

generating a first control information portion comprising first control information indicating at least a size of a second control information portion;

transmitting the first control information portion within a control region of a slot;

generating the second control information portion comprising second control information associated with a grant for the transmission of data traffic between the scheduling entity and one or more scheduled entities in wireless communication with the scheduling entity in one or more subsequent slots; and

transmitting the second control information portion over all resource elements within a traffic region of the slot;

wherein the second control information comprises a channel quality indicator request, a sounding reference signal request, or both.

2. The method of claim 1 , wherein:

the first control information portion further comprises initial control information for the grant;

the initial control information comprises one or more of a resource assignment, a rank, or a modulation order for the grant; and

the second control information comprises a transmit power control indicator.

3. The method of claim 1 , wherein the second control information portion further comprises one or more additional grants for the one or more subsequent slots.

4. The method of claim 1 , wherein the first control information further indicates a code rate of the second control information portion.

5. The method of claim 1 , wherein:

the first control information portion further comprises initial control information related to the grant;

the initial control information comprises a resource assignment, a rank, and a modulation order for the grant;

the resource assignment is commonly assigned to two or more scheduled entities, and wherein the method further comprises:

scrambling a cyclic redundancy check of the second control information portion with an identifier of one of the two or more scheduled entities.

6. The method of claim 1 , wherein transmitting the second control information portion further comprises:

distributing the second control information portion across the resource elements allocated to the second control information portion within the traffic region of the slot.

7. The method of claim 1 , further comprising:

scrambling a cyclic redundancy check of the first control information portion with a special radio network temporary identifier (RNTI) indicating that the second control information portion occupies all of the resource elements within the traffic region of the slot.

8. A method of wireless communication, comprising, at a scheduling entity:

generating a first control information portion comprising first control information indicating at least a size of a second control information portion;

transmitting the first control information portion within a control region of a slot;

generating the second control information portion comprising second control information comprising a concatenation of two or more control information components, each of the control information components comprising respective complete control information for a respective grant for the transmission of data traffic between the scheduling entity and one or more scheduled entities; and

transmitting the second control information portion over all resource elements within a traffic region of the slot;

wherein the second control information comprises a channel quality indicator request, a sounding reference signal request, or both.

9. The method of claim 8 , wherein the two or more control information components are separated by respective headers.

10. The method of claim 8 , wherein the two or more control information components are associated with multiple scheduled entities, and further comprising:

scrambling a cyclic redundancy check of the second control information portion with a group radio network temporary identifier (RNTI) or a broadcast RNTI associated with the multiple scheduled entities.

11. The method of claim 8 , wherein the two or more control information components comprise user-specific control information and common control information.

12. A scheduling entity within a wireless communication network, comprising:

a processor;

a memory communicatively coupled to the processor; and

a transceiver communicatively coupled to the processor, wherein the processor is configured to:

generate a first control information portion comprising first control information indicating at least a size of a second control information portion;

transmit the first control information portion within a control region of a slot;

generate the second control information portion comprising second control information associated with a grant for the transmission of data traffic between the scheduling entity and one or more scheduled entities in wireless communication with the scheduling entity in one or more subsequent slots; and

transmit the second control information portion over all resource elements within a traffic region of the slot;

wherein the second control information comprises a channel quality indicator request, a sounding reference signal request, or both.

13. The scheduling entity of claim 12 , wherein:

the first control information portion further comprises initial control information for the grant;

the initial control information comprises one or more of a resource assignment, a rank, or a modulation order for the grant; and

the second control information comprises a transmit power control indicator.

14. The scheduling entity of claim 12 , wherein the second control information portion further comprises one or more additional grants for the one or more subsequent slots.

15. The scheduling entity of claim 12 , wherein the first control information further indicates a code rate of the second control information portion.

16. The scheduling entity of claim 12 , wherein the processor is further configured to:

scramble a cyclic redundancy check of the first control information portion with a special radio network temporary identifier (RNTI) indicating that the second control information portion occupies all of the resource elements within the traffic region of the slot.

17. A scheduling entity within a wireless communication network, comprising:

a processor;

a memory communicatively coupled to the processor; and

a transceiver communicatively coupled to the processor, wherein the processor is configured to:

generate a first control information portion comprising first control information indicating at least a size of a second downlink control information portion;

transmit the first control information portion within a control region of a slot;

generate the second downlink control information portion comprising second control information comprising a concatenation of two or more control information components, each of the control information components comprising respective complete control information for a respective grant for the transmission of data traffic between the scheduling entity and one or more scheduled entities; and

transmit the second control information portion over all resource elements within a traffic region of the slot;

wherein the second control information comprises a channel quality indicator request, a sounding reference signal request, or both.

18. The scheduling entity of claim 17 , wherein the two or more control information components are associated with multiple scheduled entities, and wherein the processor is further configured to:

scramble a cyclic redundancy check of the second control information portion with a group radio network temporary identifier (RNTI) or a broadcast RNTI associated with the multiple scheduled entities.

19. The scheduling entity of claim 17 , wherein the two or more control information components comprise user-specific control information and common control information.

20. The scheduling entity of claim 17 , wherein the two or more control information components are separated by respective headers.

21. A scheduling entity within a wireless communication network, comprising:

means for generating a first control information portion comprising first control information indicating at least a size of a second control information portion;

means for transmitting the first control information portion within a control region of a slot;

means for generating the second control information portion comprising second control information associated with a grant for the transmission of data traffic between the scheduling entity and one or more scheduled entities in wireless communication with the scheduling entity in one or more subsequent slots; and

means for transmitting the second control information portion over all resource elements within a traffic region of the slot;

wherein the second control information comprises a channel quality indicator request, a sounding reference signal request, or both.

22. The scheduling entity of claim 21 , wherein:

the first control information portion further comprises initial control information for the grant;

the initial control information comprises one or more of a resource assignment, a rank, or a modulation order for the grant; and

the second control information comprises a transmit power control indicator.

23. The scheduling entity of claim 21 , wherein the second control information portion further comprises one or more additional grants for the one or more subsequent slots.

24. The scheduling entity of claim 21 , wherein the first control information further indicates a code rate of the second control information portion.

25. The scheduling entity of claim 21 , further comprising:

means for scrambling a cyclic redundancy check of the first control information portion with a special radio network temporary identifier (RNTI) indicating that the second control information portion occupies all of the resource elements within the traffic region of the slot.