Carrier information transmission to wireless devices
Methods, apparatuses, and systems for wireless communications are described. A base station may send a message with configuration parameters to a wireless device, and the configuration parameters may be for at least two different types of carriers used for communications.
1. A method comprising: receiving, by a wireless device and from a base station: one or more configuration parameters for each cell of a plurality of cells, wherein the plurality of cells comprise: a cell of a first cell type; and a cell of a second cell type different from the first cell type, wherein, based on no packet being in at least one downlink transmission time interval of the cell of the second cell type, the cell of the second cell type is without a reference signal in the at least one downlink transmission time interval; and information indicating whether each cell of the plurality of cells is of the first cell type or the second cell type; and transmitting channel state information of the cell of the second cell type via an uplink channel of the cell of the first cell type.
2. The method of claim 1 , further comprising skipping receipt of a common reference signal in the at least one downlink transmission time interval.
3. The method of claim 1 , wherein the cell of the second cell type comprises a second downlink transmission time interval in which a control channel is configured to start at a symbol after a first symbol in the second downlink transmission time interval.
4. The method of claim 3 , wherein the first symbol in the second downlink transmission time interval is transmitted at a power level lower than a power level associated with transmission of one or more other symbols in the second downlink transmission time interval.
5. The method of claim 1 , wherein the cell of the first cell type comprises: a plurality of transmission time intervals; and a downlink reference signal in every transmission time interval of the plurality of transmission time intervals.
6. The method of claim 1 , wherein the cell of the second cell type comprises synchronization signals located at a transmission time interval location that is different from a transmission time interval location of synchronization signals in the cell of the first cell type.
7. The method of claim 1 , further comprising receiving, from the base station, at least one message comprising: information indicating a location of primary synchronization signals in one or more transmission time intervals of the cell of the second cell type; and information indicating a location of secondary synchronization signals in one or more transmission time intervals of the cell of the second cell type.
8. The method of claim 1 , wherein the at least one downlink transmission time interval comprises a subframe.
9. A wireless device comprising: one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the wireless device to: receive, from a base station: one or more configuration parameters for each cell of a plurality of cells, wherein the plurality of cells comprise: a cell of a first cell type; and a cell of a second cell type different from the first cell type, wherein, based on no packet being in at least one downlink transmission time interval of the cell of the second cell type, the cell of the second cell type is without a reference signal in the at least one downlink transmission time interval; and information indicating whether each cell of the plurality of cells is of the first cell type or the second cell type; and transmit channel state information of the cell of the second cell type via an uplink channel of the cell of the first cell type.
10. The wireless device of claim 9 , wherein the instructions, when executed by the one or more processors, cause the wireless device to skip receipt of a common reference signal in the at least one downlink transmission time interval.
11. The wireless device of claim 9 , wherein the cell of the second cell type comprises a second downlink transmission time interval in which a control channel is configured to start at a symbol after a first symbol in the second downlink transmission time interval.
12. The wireless device of claim 11 , wherein the first symbol in the second downlink transmission time interval is transmitted at a power level lower than a power level associated with transmission of one or more other symbols in the second downlink transmission time interval.
13. The wireless device of claim 9 , wherein the cell of the first cell type comprises: a plurality of transmission time intervals; and a downlink reference signal in every transmission time interval of the plurality of transmission time intervals.
14. The wireless device of claim 9 , wherein the cell of the second cell type comprises synchronization signals located at a transmission time interval location that is different from a transmission time interval location of synchronization signals in the cell of the first cell type.
15. The wireless device of claim 9 , wherein the instructions, when executed by the one or more processors, cause the wireless device to receive, from the base station, at least one message comprising: information indicating a location of primary synchronization signals in one or more transmission time intervals of the cell of the second cell type; and information indicating a location of secondary synchronization signals in one or more transmission time intervals of the cell of the second cell type.
16. The wireless device of claim 9 , wherein the at least one downlink transmission time interval comprises a subframe.
17. A method comprising: transmitting, by a base station: one or more configuration parameters for each cell of a plurality of cells, wherein the plurality of cells comprise: a cell of a first cell type; and a cell of a second cell type different from the first cell type, wherein the cell of the second cell type is without a reference signal in at least one downlink transmission time interval when the base station is not transmitting data in the at least one downlink transmission time interval; and information indicating whether each cell of the plurality of cells is of the first cell type or the second cell type; and receiving channel state information of the cell of the second cell type via an uplink channel of the cell of the first cell type.
18. The method of claim 17 , further comprising skipping transmission of a common reference signal in the at least one downlink transmission time interval.
19. The method of claim 17 , wherein the cell of the second cell type comprises a second downlink transmission time interval in which a control channel is configured to start at a symbol after a first symbol in the second downlink transmission time interval.
20. The method of claim 19 , wherein the first symbol in the second downlink transmission time interval is transmitted at a power level lower than a power level associated with transmission of one or more other symbols in the second downlink transmission time interval.
21. The method of claim 17 , wherein the cell of the first cell type comprises: a plurality of transmission time intervals; and a downlink reference signal in every transmission time interval of the plurality of transmission time intervals.
22. The method of claim 17 , wherein the cell of the second cell type comprises synchronization signals located at a transmission time interval location that is different from a transmission time interval location of synchronization signals in the cell of the first cell type.
23. The method of claim 17 , further comprising transmitting at least one message comprising: information indicating a location of primary synchronization signals in one or more transmission time intervals of the cell of the second cell type; and information indicating a location of secondary synchronization signals in one or more transmission time intervals of the cell of the second cell type.
24. The method of claim 17 , wherein the at least one downlink transmission time interval comprises a subframe.
25. A base station comprising: one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the base station to: transmit: one or more configuration parameters for each cell of a plurality of cells, wherein the plurality of cells comprise: a cell of a first cell type; and a cell of a second cell type different from the first cell type, wherein the cell of the second cell type is without a reference signal in at least one downlink transmission time interval when the base station is not transmitting data in the at least one downlink transmission time interval; and information indicating whether each cell of the plurality of cells is of the first cell type or the second cell type; and receive channel state information of the cell of the second cell type via an uplink channel of the cell of the first cell type.
26. The base station of claim 25 , wherein the instructions, when executed by the one or more processors, cause the base station to skip transmission of a common reference signal in the at least one downlink transmission time interval.
27. The base station of claim 25 , wherein the cell of the second cell type comprises a second downlink transmission time interval in which a control channel is configured to start at a symbol after a first symbol in the second downlink transmission time interval.
28. The base station of claim 27 , wherein the first symbol in the second downlink transmission time interval is transmitted at a power level lower than a power level associated with transmission of one or more other symbols in the second downlink transmission time interval.
29. The base station of claim 25 , wherein the cell of the first cell type comprises: a plurality of transmission time intervals; and a downlink reference signal in every transmission time interval of the plurality of transmission time intervals.
30. The base station of claim 25 , wherein the cell of the second cell type comprises synchronization signals located at a transmission time interval location that is different from a transmission time interval location of synchronization signals in the cell of the first cell type.
31. The base station of claim 25 , wherein the instructions, when executed by the one or more processors, cause the base station to transmit at least one message comprising: information indicating a location of primary synchronization signals in one or more transmission time intervals of the cell of the second cell type; and information indicating a location of secondary synchronization signals in one or more transmission time intervals of the cell of the second cell type.
32. The base station of claim 25 , wherein the at least one downlink transmission time interval comprises a subframe.
33. A non-transitory computer-readable medium storing instructions that, when executed, configure a wireless device to: receive, from a base station: one or more configuration parameters for each cell of a plurality of cells, wherein the plurality of cells comprise: a cell of a first cell type; and a cell of a second cell type different from the first cell type, wherein, based on no packet being in at least one downlink transmission time interval of the cell of the second cell type, the cell of the second cell type is without a reference signal in the at least one downlink transmission time interval; and information indicating whether each cell of the plurality of cells is of the first cell type or the second cell type; and transmit channel state information of the cell of the second cell type via an uplink channel of the cell of the first cell type.
34. The non-transitory computer-readable medium of claim 33 , wherein the instructions, when executed, further configure the wireless device to skip receipt of a common reference signal in the at least one downlink transmission time interval.
35. The non-transitory computer-readable medium of claim 33 , wherein the cell of the second cell type comprises a second downlink transmission time interval in which a control channel is configured to start at a symbol after a first symbol in the second downlink transmission time interval.
36. The non-transitory computer-readable medium of claim 35 , wherein the first symbol in the second downlink transmission time interval is transmitted at a power level lower than a power level associated with transmission of one or more other symbols in the second downlink transmission time interval.
37. The non-transitory computer-readable medium of claim 33 , wherein the cell of the first cell type comprises: a plurality of transmission time intervals; and a downlink reference signal in every transmission time interval of the plurality of transmission time intervals.
38. The non-transitory computer-readable medium of claim 33 , wherein the cell of the second cell type comprises synchronization signals located at a transmission time interval location that is different from a transmission time interval location of synchronization signals in the cell of the first cell type.
39. The non-transitory computer-readable medium of claim 33 , wherein the instructions, when executed, further configure the wireless device to receive, from the base station, at least one message comprising: information indicating a location of primary synchronization signals in one or more transmission time intervals of the cell of the second cell type; and information indicating a location of secondary synchronization signals in one or more transmission time intervals of the cell of the second cell type.
40. The non-transitory computer-readable medium of claim 33 , wherein the at least one downlink transmission time interval comprises a subframe.
41. A non-transitory computer-readable medium storing instructions that, when executed, configure a base station to: transmit: one or more configuration parameters for each cell of a plurality of cells, wherein the plurality of cells comprise: a cell of a first cell type; and a cell of a second cell type different from the first cell type, wherein the cell of the second cell type is without a reference signal in at least one downlink transmission time interval when the base station is not transmitting data in the at least one downlink transmission time interval; and information indicating whether each cell of the plurality of cells is of the first cell type or the second cell type; and receive channel state information of the cell of the second cell type via an uplink channel of the cell of the first cell type.
42. The non-transitory computer-readable medium of claim 41 , wherein the instructions, when executed, further configure the base station to skip transmission of a common reference signal in the at least one downlink transmission time interval.
43. The non-transitory computer-readable medium of claim 41 , wherein the cell of the second cell type comprises a second downlink transmission time interval in which a control channel is configured to start at a symbol after a first symbol in the second downlink transmission time interval.
44. The non-transitory computer-readable medium of claim 43 , wherein the first symbol in the second downlink transmission time interval is transmitted at a power level lower than a power level associated with transmission of one or more other symbols in the second downlink transmission time interval.
45. The non-transitory computer-readable medium of claim 41 , wherein the cell of the first cell type comprises: a plurality of transmission time intervals; and a downlink reference signal in every transmission time interval of the plurality of transmission time intervals.
46. The non-transitory computer-readable medium of claim 41 , wherein the cell of the second cell type comprises synchronization signals located at a transmission time interval location that is different from a transmission time interval location of synchronization signals in the cell of the first cell type.
47. The non-transitory computer-readable medium of claim 41 , wherein the instructions, when executed, further configure the base station to transmit at least one message comprising: information indicating a location of primary synchronization signals in one or more transmission time intervals of the cell of the second cell type; and information indicating a location of secondary synchronization signals in one or more transmission time intervals of the cell of the second cell type.
48. The non-transitory computer-readable medium of claim 41 , wherein the at least one downlink transmission time interval comprises a subframe.
49. A system comprising: a base station; and a wireless device, wherein the base station is configured to transmit: one or more configuration parameters for each cell of a plurality of cells, wherein the plurality of cells comprise: a cell of a first cell type; and a cell of a second cell type different from the first cell type, wherein, based on no packet being in at least one downlink transmission time interval of the cell of the second cell type, the cell of the second cell type is without a reference signal in the at least one downlink transmission time interval; and information indicating whether each cell of the plurality of cells is of the first cell type or the second cell type; and wherein the wireless device is configured to: transmit channel state information of the cell of the second cell type via an uplink channel of the cell of the first cell type.
50. The system of claim 49 , wherein the base station is configured to skip transmission of a common reference signal in the at least one downlink transmission time interval.
51. The system of claim 49 , wherein the cell of the second cell type comprises a second downlink transmission time interval in which a control channel is configured to start at a symbol after a first symbol in the second downlink transmission time interval.
52. The system of claim 51 , wherein the first symbol in the second downlink transmission time interval is transmitted at a power level lower than a power level associated with transmission of one or more other symbols in the second downlink transmission time interval.
53. The system of claim 49 , wherein the cell of the first cell type comprises: a plurality of transmission time intervals; and a downlink reference signal in every transmission time interval of the plurality of transmission time intervals.
54. The system of claim 49 , wherein the cell of the second cell type comprises synchronization signals located at a transmission time interval location that is different from a transmission time interval location of synchronization signals in the cell of the first cell type.
55. The system of claim 49 , wherein the base station is configured to transmit at least one message comprising: information indicating a location of primary synchronization signals in one or more transmission time intervals of the cell of the second cell type; and information indicating a location of secondary synchronization signals in one or more transmission time intervals of the cell of the second cell type.
56. The system of claim 49 , wherein the at least one downlink transmission time interval comprises a subframe.