Legal claims defining the scope of protection, as filed with the USPTO.
1. A method for transmitting control symbols and data symbols on multiple input, multiple output (MIMO) layers, the method comprising: selecting a first set of codewords from N cw codewords, wherein the first set of codewords is associated with a first set of layers from the multiple MIMO layers, and wherein the N cw codewords are to be transmitted simultaneously and the first set of codewords comprises N cw1 MIMO codewords, where N cw and N cw1 are integers greater than or equal to 1; distributing control symbols onto the first set of layers, wherein a quantity of the control symbols for each of the first set of layers is determined in accordance with a variable transmission rank-dependent offset of the first set of codewords, wherein the offset is different for different transmission ranks each having a different total number of the MIMO layers; placing data symbols of the first set of codewords onto the first set of layers; placing data symbols of the (N cw -N cw1 ) remaining codewords to remaining layers if N cw >N cw1 , wherein the remaining layers are MIMO layers from the multiple MIMO layers not in the first set of layers; and transmitting the multiple MIMO layers.
2. The method of claim 1 , wherein the transmitting the multiple MIMO layers comprises precoding the data symbols and the control symbols with a discrete Fourier transform (DFT) transform.
3. The method of claim 1 , wherein the first set of codewords comprises a single codeword.
4. The method of claim 3 , wherein the control symbols comprise channel quality information (CQI), precoding matrix indicators (PMI), or a combination thereof.
5. The method of claim 3 , wherein the first set of codewords is selected by a controller serving a communications device.
6. The method of claim 5 , wherein the first set of codewords is signaled to the communications device via a downlink message.
7. The method of claim 5 , wherein the first set of codewords is selected based on channel quality.
8. The method of claim 5 , wherein the first set of codewords is selected based on a modulating and coding scheme (MCS) level associated with the codewords.
9. The method of claim 5 , wherein the first set of codewords is selected based on the number of layers associated with the codewords.
10. The method of claim 5 , wherein the first set of codewords is selected based on a level of impact the control symbols have on a performance of a data transmission of each codeword.
11. The method of claim 10 , wherein the level of impact is a proportion of control symbols to data symbols for each codeword.
12. The method of claim 5 , wherein the first set of codewords is selected based on a hybrid automatic repeat request (HARQ) transmission status associated with the codewords.
13. The method of claim 1 , wherein the first set of codewords comprises N cw codewords, where N cw1 =N cw .
14. The method of claim 13 , wherein the control symbols comprise hybrid automatic repeat requested (HARQ) positive acknowledgement (ACK)/negative acknowledgement (NACK) signals, rank indicator (RI) signals, or a combination thereof.
15. The method of claim 13 , wherein the control symbols are time division multiplexed with the data symbols such that the control symbols are time-aligned across the multiple MIMO layers.
16. The method of claim 1 , wherein a size of the control symbols distributed onto the first set of layers is based on modulating and coding scheme (MCS) levels of the first set of codewords.
17. The method of claim 16 , wherein a function of the MCS levels of the first set of codewords depends on N cw1 , N cw , or a combination thereof.
18. The method of claim 1 , wherein distributing control symbols onto the first set of layers comprises distributing control symbols to substantially the same resource elements across the first set of layers.
19. The method of claim 1 , wherein selecting a first set of codewords comprises selecting two different first sets of codewords for two different types of control symbols.
20. A method for transmitting control symbols and data symbols on multiple input, multiple output (MIMO) layers, the method comprising: constructing one or more codewords to be simultaneously transmitted over a plurality of MIMO layers; distributing control symbols over the plurality of MIMO layers, wherein a quantity of the control symbols for each of the plurality of MIMO layers is determined in accordance with a variable transmission rank-dependent offset of the one or more codewords, wherein the offset is different for different transmission ranks each having a different total number of the MIMO layers; placing data symbols of the one or more codewords onto the plurality of MIMO layers; and transmitting the multiple MIMO layers.
21. The method of claim 20 , wherein the control symbols comprise hybrid automatic repeat requested (HARQ) positive acknowledgement (ACK)/negative acknowledgement (NACK) signals, rank indicator (RI) signals, or a combination thereof.
22. The method of claim 20 , wherein the control symbols are time-aligned across each of the plurality of MIMO layers.
23. The method of claim 20 , wherein the control symbols are time-division multiplexed with data symbols.
24. A method for transmitting control symbols and data symbols on multiple input, multiple output (MIMO) layers, the method comprising: selecting a codeword from a plurality of codewords, wherein the plurality of codewords are to be transmitted over a plurality of MIMO layers, and the selected codeword is to be transmitted over a subset of MIMO layers of the plurality of MIMO layers; distributing control symbols onto the subset of MIMO layers, wherein a quantity of the control symbols for each of the subset of MIMO layers is determined in accordance with a variable transmission rank-dependent offset of the selected codeword, wherein the offset is different for different transmission ranks each having a different total number of the MIMO layers; placing data symbols of the plurality of codewords onto the plurality of layers; and transmitting the multiple MIMO layers.
25. The method of claim 24 , wherein the control symbols comprise channel quality information (CQI) and/or precoding matrix indicators (PMI).
26. The method of claim 24 , wherein the subset of MIMO layers comprises a single MIMO layer or two MIMO layers.
27. The method of claim 24 , wherein the subset of MIMO layers is chosen based on channel quality, access level, or a combination thereof.
28. A method for transmitting control symbols and data symbols on multiple input, multiple output (MIMO) layers, the method comprising: identifying a type of the control symbols; selecting a first set of codewords according to the type of the control symbols; and multiplexing the control symbols with data on the first set of codewords, wherein a quantity of the control symbols for each of the MIMO layers is determined in accordance with a variable transmission rank-dependent offset of the first set of codewords, wherein the offset is different for different transmission ranks each having a different total number of the MIMO layers.
29. The method of claim 28 , wherein the control symbols comprise hybrid automatic repeat requested (HARQ) positive acknowledgement (ACK)/negative acknowledgement (NACK) signals, rank indicator (RI) signals, or a combination thereof.
30. The method of claim 29 , wherein the first set of codewords comprises two or more codewords.
31. The method of claim 28 , wherein the control symbols comprise channel quality information (CQI), precoding matrix indicators (PMI), or a combination thereof.
32. The method of claim 31 , wherein the first set of codewords comprises a single codeword.
33. The method of claim 32 , wherein the first set of codewords is selected based on a modulating and coding scheme (MCS) level associated with the codewords.
34. A communications device comprising: a selecting unit configured to select a first set of codewords from N cw codewords, wherein the first set of codewords is associated with a first set of layers from a plurality of multiple input, multiple output (MIMO) layers, and wherein the N cw codewords are to be transmitted simultaneously and the first set of codewords comprises N cw1 MIMO codewords, where N cw and N cw1 are integers greater than or equal to 1; a distributing unit coupled to the selecting unit, the distributing unit configured to distribute control symbols onto the first set of layers, wherein a quantity of the control symbols for each of the first set of layers is determined in accordance with a variable transmission rank-dependent offset of the first set of codewords, wherein the offset is different for different transmission ranks each having a different total number of the MIMO layers; a placing unit coupled to the distributing unit and to the selecting unit, the placing unit configured to place data symbols of the first set of codewords onto the first set of layers, and to place data symbols of the (N cw -N cw1 ) remaining codewords onto remaining layers if N cw >N cw1 , wherein the remaining layers are MIMO layers from the plurality of MIMO layers not in the first set of layers; and a transmitter coupled to the placing unit, the transmitter configured to transmit the plurality of MIMO layers.
35. The communications device of claim 34 , wherein the transmitter is further configured precode the data symbols and the control symbols with a discrete Fourier transform.
36. The communications device of claim 34 , wherein the first set of codewords comprises a single codeword, and wherein the control symbols comprise channel quality information (CQI), precoding matrix indicators (PMI), or a combination thereof.
37. The communications device of claim 36 , further comprising a receiver coupled to the selecting unit, the receiver configured to receive an indicator from a controller serving the communications device, the indicator comprising information about the first set of codewords.
38. The communications device of claim 34 , wherein the first set of codewords comprises N cw codewords, where N cw1 =N cw , and wherein the control symbols comprise hybrid automatic repeat requested (HARQ) positive acknowledgement (ACK)/negative acknowledgement (NACK) signals, rank indicator (RI) signals, or a combination thereof.
39. The communications device of claim 38 , wherein the distributing unit is configured to time division multiplex the control symbols with the data symbols so that the control symbols are time-aligned across the multiple MIMO layers.
40. The communications device of claim 34 , wherein the distributing unit is configured to distribute a size of the control symbols onto the first set of layers based on modulation and coding scheme (MCS) levels of the first set of codewords.
41. The communications device of claim 34 , wherein the distributing unit is configured to distribute the control symbols onto the first set of layers so that the control symbols are distributed to substantially the same resource elements across the first set of layers.
42. The communications device of claim 34 , wherein the selecting unit is configured to select two different first sets of codewords for two different types of control symbols.
43. A communication device comprising: an identifying unit configured to identify a type of control symbols to be transmitted on a plurality of multiple input, multiple output (MIMO) layers; a selecting unit coupled to the identifying unit, the selecting unit configured to select a first set of codewords according to the type of the control symbols; and a multiplexer coupled to the identifying unit, the multiplexer configured to multiplex the control symbols with data on the first set of codewords, wherein a quantity of the control symbols for each of the MIMO layers is determined in accordance with a variable transmission rank-dependent offset of the first set of codewords, wherein the offset is different for different transmission ranks each having a different total number of the MIMO layers.
44. The communication device of claim 43 , wherein the selecting unit is configured to select two or more codewords according to the type of the control symbols, and wherein the control symbols comprise hybrid automatic repeat requested (HARQ) positive acknowledgement (ACK)/negative acknowledgement (NACK) signals, rank indicator (RI) signals, or a combination thereof.
45. The communication device of claim 43 , wherein the selecting unit is configured to select a single codeword according to the type of the control symbols, and wherein the control symbols comprise channel quality information (CQI), precoding matrix indicators (PMI), or a combination thereof.
46. The communication device of claim 45 , wherein the first set of codewords is selected based on a modulating and coding scheme (MCS) level associated with the codewords.
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February 23, 2016
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