CROSS-DIVISION DUPLEX SIGNALING
Methods, systems, and apparatus, including computer programs encoded on computer storage media, for signaling cross-division duplex configurations. One of the methods includes determining, by a first device and for a symbol in a time slot of a cross-division duplex transmission link with a second device, that the first device can use a combination of multiple different symbol types across frequency to communicate with the second device at the symbol using cell-specific configuration data that indicates, for each of multiple symbols across time, various combinations of two or more symbol types from the multiple different symbol types to use to communicate across the respective symbol; and communicating, by the first device and with the second device using the cross-division duplex transmission link, across the symbol in the time slot using a first symbol type for a first bandwidth unit and a second, different symbol type for a second, different bandwidth unit.
1 . A method comprising:
determining, by a first device and for a symbol in a time slot of a cross-division duplex transmission link between the first device and a second device, that the first device can use a combination of multiple different symbol types across frequency to communicate with the second device at the symbol using cell-specific configuration data that indicates, for each of multiple symbols across time including the symbol, various combinations of two or more symbol types from the multiple different symbol types to use to communicate across the respective symbol; and
communicating, by the first device and with the second device using the cross-division duplex transmission link, across the symbol in the time slot using a first symbol type for a first set of bandwidth units and a second, different symbol type for a second, different set of bandwidth units.
2 . The method of claim 1 , comprising:
sending, to the second device, data that indicates, for the symbol, a first channel bandwidth as the first set of bandwidth units for the first symbol type and a second channel bandwidth for the second, different set of bandwidth units for the second, different symbol type.
3 . The method of claim 1 , comprising:
sending, to the second device, data that indicates, for the symbol, the first symbol type for a first bandwidth unit from the first set of bandwidth units and the second, different symbol type for a second bandwidth unit from the second, different set of bandwidth units.
4 . The method of claim 3 , wherein sending the data comprises sending a bitmap that includes, for each bandwidth unit, a bit that indicates whether the corresponding bandwidth unit has a downlink symbol or an uplink symbol.
5 . The method of claim 3 , wherein sending the data comprises sending a bitmap that includes, for one or more groups of multiple bandwidth units, a bit that indicates whether the bandwidth units in the corresponding group have a downlink symbol or an uplink symbol.
6 . The method of claim 1 , comprising:
sending, to the second device, data that indicates, for the symbol, a first quantity of downlink symbols at a first extreme of a bandwidth unit range for the symbol and a second quantity of uplink symbols adjacent to the first quantity of downlink symbols in the bandwidth unit range for the symbol.
7 . The method of claim 1 , comprising:
sending, to the second device, data that indicates, i) for the first set of bandwidth units of the symbol: a first start location, a first size, and the first symbol type, and ii) for the second, different set of bandwidth units of the symbol: a second start location, a second size, and the second, different symbol type.
8 . The method of claim 1 , comprising:
sending, to the second device, data that indicates, i) for the first set of bandwidth units of the symbol: a first start location, a first end location, and the first symbol type, and ii) for the second, different set of bandwidth units of the symbol: a second start location, a second end location, and the second, different symbol type.
9 . The method of claim 1 , wherein the cell-specific configuration data comprises a tdd-UL-DL-ConfigurationCommon that identifies one or more symbols for which a device can communicate using the multiple different symbol types across frequency and using the multiple different symbol types across time.
10 . The method of claim 9 , determining that the first device can use a combination of multiple different symbol types across frequency to communicate with the second device at the symbol comprises determining, by the first device, that the cell-specific configuration data identifies the symbol as a cross-division flexible symbol that the first device can use to communicate using a combination of a first symbol type from the multiple different symbol types and a second, different symbol type from the multiple different symbol types.
11 . The method of claim 9 , determining that the first device can use a combination of multiple different symbol types across frequency to communicate with the second device at the symbol comprises:
determining, by the first device, that the cell-specific configuration data identifies the symbol as a flexible symbol that the first device can use to communicate using a first symbol type from the multiple different symbol types or a second, different symbol type from the multiple different symbol types but not both; and
in response to determining that the cell-specific configuration data identifies the symbol as a flexible symbol, determining, by the first device, that the first device can use a combination of multiple different symbol types across frequency to communicate with the second device at the symbol based on the cross-division duplex transmission link between the first device and the second device.
12 . The method of claim 11 , wherein determining that the first device can use a combination of multiple different symbol types across frequency to communicate with the second device at the symbol comprises determining that the cell-specific configuration data identifies the symbol as a cross-division flexible symbol and a second symbol as a flexible symbol that the first device can use to communicate using a first symbol type from the multiple different symbol types or a second, different symbol type from the multiple different symbol types but not both.
13 . The method of claim 1 , wherein determining that the first device can use a combination of multiple different symbol types across frequency to communicate with the second device at the symbol comprises determining, by the first device, that the first device can use a combination of multiple different symbol types across frequency to communicate with the second device at the symbol using two or more cell-specific configuration data sets that i) each are for a different sets of bandwidth units, and ii) include the cell-specific configuration data.
14 . The method of claim 1 , wherein the cell-specific configuration data comprises i) a tdd-UL-DL-ConfigurationCommon that identifies one or more symbols for which a device can communicate using the multiple different symbol types across time and ii) a cross-division flexible symbol cell-specific configuration data that identifies one or more cross-division flexible symbols for which a device can communicate using the multiple different symbol types across frequency and using the multiple different symbol types across time.
15 . The method of claim 14 , wherein:
the tdd-UL-DL-ConfigurationCommon comprises a flag that indicates that the cell-specific configuration data comprises the cross-division flexible symbol cell-specific configuration data, the method comprising:
detecting, by the first device, the existence of the cross-division flexible symbol cell-specific configuration data using the flag; and
in response to detecting the existence of the cross-division flexible symbol cell-specific configuration data using the flag, determining the one or more cross-division flexible symbols that include the symbol.
16 . The method of claim 1 , wherein determining that the first device can use a combination of multiple different symbol types across frequency to communicate with the second device at the symbol comprises determining, by the first device, the cell-specific configuration data that indicates, for a time slot that includes multiple symbols including the symbol, that the first device can use a combination of different symbol types across frequency for each symbol in the multiple symbols.
17 . The method of claim 16 , wherein the cell-specific configuration data comprises one or more of:
a cross-division slot field that indicates a quantity of consecutive cross-division flexible slots in a pattern for which a device can communicate using the multiple different symbol types across frequency and using the multiple different symbol types across time;
a cross-division symbol field that indicates a quantity of consecutive cross-division flexible symbols in a cross-division flexible slot;
a flexible slots field that indicates a quantity of consecutive flexible slots in a pattern for which a device can communicate using the multiple different symbol types across time;
a flexible symbol field that indicates a quantity of consecutive flexible symbols in a flexible slot; or
a flexible symbol frequency field that indicates a quantity of downlink, a quantity of uplink, or both, symbols across frequency.
18 . A non-transitory computer storage medium encoded with instructions that, when executed by one or more baseband processors, cause the one or more baseband processors to perform operations comprising:
determining, for a symbol in a time slot of a cross-division duplex transmission link between a first device that includes the one or more baseband processors and a second device, that the first device can use a combination of multiple different symbol types across frequency to communicate with the second device at the symbol using cell-specific configuration data that indicates, for each of multiple symbols across time including the symbol, various combinations of two or more symbol types from the multiple different symbol types to use to communicate across the respective symbol; and
communicating, by the first device and with the second device using the cross-division duplex transmission link, across the symbol in the time slot using a first symbol type for a first set of bandwidth units and a second, different symbol type for a second, different set of bandwidth units.
19 . A system comprising one or more baseband processors configured to perform operations comprising:
determining, for a symbol in a time slot of a cross-division duplex transmission link between a first device that includes the one or more baseband processors and a second device, that the first device can use a combination of multiple different symbol types across frequency to communicate with the second device at the symbol using cell-specific configuration data that indicates, for each of multiple symbols across time including the symbol, various combinations of two or more symbol types from the multiple different symbol types to use to communicate across the respective symbol; and
communicating, by the first device and with the second device using the cross-division duplex transmission link, across the symbol in the time slot using a first symbol type for a first set of bandwidth units and a second, different symbol type for a second, different set of bandwidth units.
20 . The system of claim 19 , the operations comprising:
sending, to the second device, data that indicates, for the symbol, a first channel bandwidth as the first set of bandwidth units for the first symbol type and a second channel bandwidth for the second, different set of bandwidth units for the second, different symbol type.