Discovery signal measurement timing configuration for SCells in asynchronous networks

A method of operating a radio access node in a cellular communications network having a primary cell and one or more secondary cells, comprising:

• determining whether to configure a cell as a first secondary cell of the wireless device;
• and
• sending, to a wireless device, a Discovery Signal Measurement Timing Configuration (DMTC) for one of a group consisting of:
• a first secondary cell of the one or more secondary cells configured for the wireless device such that the DMTC is a specific DMTC for the first secondary cell;
• and
• the primary cell and additional cells that are configurable as secondary cells such that the DMTC applies to both the primary cell and the additional cells when configured as secondary cells,
• wherein sending the DMTC comprises sending the DMTC for the cell in a message that adds the cell as the secondary cell of the wireless device.

A method of operating a wireless device in a cellular communications network, comprising:

• receiving a Discovery Signal Measurement Timing Configuration (DMTC) for a secondary cell configured for the wireless device such that the DMTC is a specific DMTC for the secondary cell, wherein receiving the DMTC comprises receiving a message that configures the secondary cell for the wireless device, the message comprising the DMTC for the secondary cell such that the DMTC is a specific DMTC for the secondary cell;
• and
• utilizing the DMTC to communicate with the secondary cell, wherein utilizing the DMTC to communicate with the secondary cell comprises:
• determining that the message that configures the secondary cell for the wireless device comprises the DMTC for the secondary cell;
• and
• upon determining that the message comprises the DMTC for the secondary cell, prioritizing measurements according to the DMTC for the secondary cell.

A wireless device for a cellular communications network, comprising:

• a transceiver;
• a processor;
• and
• a memory comprising instructions executable by the processor whereby the wireless device is operable to:
• receive a Discovery Signal Measurement Timing Configuration, DMTC, for a secondary cell configured for the wireless device such that the DMTC is a specific DMTC for the secondary cell, wherein receiving the DMTC comprises receiving a message that configures the secondary cell for the wireless device, the message comprising the DMTC for the secondary cell such that the DMTC is a specific DMTC for the secondary cell;
• and
• utilize the DMTC to communicate with the secondary cell, wherein utilizing the DMTC to communicate with the secondary cell comprises:
• determining that the message that configures the secondary cell for the wireless device comprises the DMTC for the secondary cell;
• and
• upon determining that the message comprises the DMTC for the secondary cell, prioritizing measurements according to the DMTC for the secondary cell.