Modulation schemes in a wireless device and wireless network

A method comprising:

• receiving, by a wireless device, at least one message comprising configuration parameters of a plurality of cells, in a cross-carrier scheduling group, comprising a first cell and a second cell, wherein the second cell is identified by a cell identifier employing a first number of bits, and wherein the configuration parameters:
• indicate that the second cell is a cross-carrier scheduling cell associated with the first cell;
• and
• comprise the cell identifier and a first cell indicator field, wherein the first cell indicator field indicates the first cell and employs a second number of bits less than the first number of bits;
• receiving, via a control channel of the second cell, downlink control information (DCI) for a packet associated with the first cell and comprising the first cell indicator field;
• and
• receiving, based on the DCI and via radio resources of the first cell, the packet.

A base station comprising:

• one or more processors;
• and
• memory storing instructions that, when executed by one or more processors, cause the base station to:
• transmit at least one message comprising configuration parameters of a plurality of cells, in a cross-carrier scheduling group, comprising a first cell and a second cell, wherein the second cell is identified by a cell identifier employing a first number of bits, and wherein the configuration parameters:
• indicate that the second cell is a cross-carrier scheduling cell associated with the first cell;
• and
• comprise the cell identifier and a first cell indicator field, wherein the first cell indicator field indicates the first cell and employs a second number of bits less than the first number of bits;
• transmit, via a control channel of the second cell, downlink control information (DCI) for a packet associated with the first cell and comprising the first cell indicator field;
• and
• transmit, based on the DCI and via radio resources of the first cell, the packet.

A method comprising:

• transmitting, by a base station, at least one message comprising configuration parameters of a plurality of cells, in a cross-carrier scheduling group, comprising a first cell and a second cell, wherein the second cell is identified by a cell identifier employing a first number of bits, and wherein the configuration parameters:
• indicate that the second cell is a cross-carrier scheduling cell associated with the first cell;
• and
• comprise the cell identifier and a first cell indicator field, wherein the first cell indicator field indicates the first cell and employs a second number of bits less than the first number of bits;
• transmitting, via a control channel of the second cell, downlink control information (DCI) for a packet associated with the first cell and comprising the first cell indicator field;
• and
• transmitting, based on the DCI and via radio resources of the first cell, the packet.