Closed loop MIMO harmonized feedback
View Patent ↗The subject matter disclosed herein provides methods and apparatus for closed loop operation of a wireless system implementing multiple input multiple output (MIMO). In one aspect, there is provided a method. The method may include receiving a payload including channel estimation information. Moreover, one or more bits of the payload may be inserted into a subset of the tiles of a slot. The slot including the subset of the tiles carrying the one or more bits of the payload may be provided as part of a closed loop MIMO-based system. Related systems, apparatus, methods, and/or articles are also described.
1. A method operable with at least one client device in a closed loop operation of a wireless system, comprising:
receiving, at the at least one client device, a payload, including channel estimation information from a closed loop base station;
inserting, at the at least one client device, into a subset of tiles of a slot, one or more bits of the payload; and
providing, at the at least one client device, the slot to said closed loop base station, including the subset of the tiles carrying the one or more bits of the payload,
wherein said slot is used as feedback enabling said closed loop base station to configure a precoder in said channel estimation information.
2. The method of claim 1 further comprising:
configuring the payload to 6 bits comprising a precoder matrix index.
3. The method of claim 1 further comprising:
configuring the payload to 6 bits comprising 4 bits representing a precoder matrix index and 2 bits representing a differential carrier-to-interference-plus-noise ratio.
4. The method of claim 1 further comprising:
configuring the payload to 6 bits comprising 3 bits representing a precoder matrix index, 2 bits representing a differential carrier-to-interference-plus-noise ratio, and 1 bit representing rank information.
5. The method of claim 1 , wherein inserting further comprises:
inserting the payload into a subset of ½ of the tiles of the slot.
6. The method of claim 1 , wherein inserting further comprises:
inserting the payload into a subset of ⅓ of the tiles of the slot.
7. The method of claim 1 , wherein inserting further comprises:
inserting 18-bits of payload into the tiles of the slot.
8. The method of claim 1 , wherein inserting further comprises:
inserting the payload into a plurality of even tiles of the slot.
9. The method of claim 1 , wherein inserting further comprises:
inserting the payload into a plurality of odd tiles of the slot.
10. The method of claim 1 , wherein providing further comprises:
transmitting, from the client device to the base station, the slot including the subset of the tiles carrying the one or more bits of the payload using a channel quality indicator channel.
11. A system, comprising:
a processor; and
a memory,
wherein the processor and memory are configured to:
receive a payload including channel estimation information from a closed loop base station,
insert, into a subset of tiles of a slot, one or more bits of the payload, and
provide the slot to said closed loop base station, including the subset of the tiles carrying the one or more bits of the payload, wherein said slot is as feedback enabling said closed loop base station to configure a precoder in said channel estimation information.
12. The system of claim 11 , wherein the processor and the memory are configured to provide the payload as 6 bits comprising a precoder matrix index.
13. The system of claim 11 , wherein the processor and the memory are configured to provide the payload as 6 bits comprising 4 bits representing a precoder matrix index and 2 bits representing a differential carrier-to-interference-plus-noise ratio.
14. The system of claim 11 , wherein the processor and the memory are configuring to provide the payload as 6 bits comprising 3 bits representing a precoder matrix index, 2 bits representing a differential carrier-to-interference-plus-noise ratio, and 1 bit representing rank information.
15. The system of claim 11 , wherein inserting further comprises:
inserting the payload into a subset of ½ of the tiles of the slot.
16. The system of claim 11 , wherein inserting further comprises:
inserting the payload into a subset of ⅓ of the tiles of the slot.
17. The system of claim 11 , wherein inserting further comprises:
inserting 18-bits of payload into the tiles of the slot.
18. A non-transitory computer-readable storage medium containing instructions to configure a processor to:
receive a payload including channel estimation information from a closed loop base station, including channel estimation information,
insert, into a subset of tiles of a slot, one or more bits of the payload, and
provide the slot to said closed loop base station, including the subset of the tiles carrying the one or more bits of the payload, wherein said slot is used as feedback enabling said base station to configure a precoder in said channel estimation information.
19. The non-transitory computer-readable storage medium of claim 18 , wherein the instructions further configure the processor to provide the payload as 6 bits comprising a precoder matrix index.
20. The non-transitory computer-readable storage medium of claim 18 , wherein the instructions further configure the processor to provide the payload as 6 bits comprising:
4 bits representing a precoder matrix index; and
2 bits representing a differential carrier-to-interference-plus-noise ratio.