Power saving in wireless transceiver device

A first wireless transceiver device for a device-to-device (D2D) communication network supporting a wireless D2D link between the first wireless transceiver device and a second wireless transceiver device in the D2D network, the first wireless transceiver device comprising:

• a processing unit;
• and
• a storage medium storing instructions executable by said processing unit whereby said first wireless transceiver device is operative to:
• receive capability information from the second wireless transceiver device on wireless D2D communication resources;
• transmit power saving information about a power saving mode configuration based on the received capability information to the second wireless transceiver device, the power saving information comprising information about sleep periods and active periods of the second transceiver device;
• transmit a sync signal with a timing based at least in part on the power saving mode configuration, for facilitating re-synchronization of the second wireless transceiver device with the first wireless transceiver device in conjunction with an end of a sleep period of the second wireless transceiver device in accordance with the power saving mode configuration;
• and
• receive and/or transmit communications of the second wireless transceiver device via the D2D link, and wirelessly relay, via another wireless link, the communications of the second wireless transceiver device to provide the second wireless transceiver device with access to a radio access node of a cellular communication network,
• wherein the first wireless transceiver device is not the radio access node of the cellular communication network.

A method performed by a second wireless transceiver device in a device-to-device (D2D) communication network supporting a wireless D2D link between the second wireless transceiver device and a first wireless transceiver device in the D2D network, the method comprising:

• transmitting capability information to the first wireless transceiver device on wireless D2D communication resources;
• receiving power saving information about a power saving mode configuration from the first wireless transceiver device, the power saving information comprising information about sleep periods and active periods of the second wireless transceiver device;
• entering a sleep period in accordance with the power saving mode configuration;
• in conjunction with an end of the sleep period, re-synchronizing with the first wireless transceiver device by means of receiving a sync signal from said first wireless transceiver device;
• when not in the sleep period, obtaining access to a radio access node of a cellular communication network by receiving from the first wireless transceiver device and/or transmitting to the first wireless transceiver device, communications of the second wireless transceiver device via the D2D link,
• wherein the first wireless transceiver device is not the radio access node of the cellular communication network.

A second wireless transceiver device for a device-to-device (D2D) communication network supporting a wireless D2D link between the second wireless transceiver device and a first wireless transceiver device in the D2D network, the second wireless transceiver device comprising:

• a processing unit;
• and
• a non-transitory storage medium storing instructions executable by said processing unit whereby said second wireless transceiver device is operative to:
• transmit capability information to the first wireless transceiver device on wireless D2D communication resources;
• receive power saving information about a power saving mode configuration from the first wireless transceiver device, the power saving information comprising information about sleep periods and active periods of the second wireless transceiver device;
• enter a sleep period in accordance with the power saving mode configuration;
• in conjunction with an end of the sleep period, re-synchronize with the first wireless transceiver device by means of receiving a sync signal from said first wireless transceiver device;
• and
• when not in the sleep period, obtain access to a radio access node of a cellular communication network by receiving from the first wireless transceiver device and/or transmitting to the first wireless transceiver device communications of the second wireless transceiver device via the D2D link,
• wherein the first wireless transceiver device is not the radio access node of the cellular communication network.

A non-transitory processor-readable storage medium comprising a computer program comprising computer program code which is able to, when run on processor circuitry of a first wireless transceiver device in a device-to-device (D2D) communication network supporting a wireless D2D link between the first wireless transceiver device and a second wireless transceiver device in the D2D network, cause the first wireless transceiver device to:

• receive capability information from the second wireless transceiver device on wireless D2D communication resources;
• transmit power saving information about a power saving mode configuration based on the received capability information to the second wireless transceiver device, the power saving information comprising information about sleep periods and active periods of the second transceiver device;
• transmit a sync signal with a timing based at least in part on the power saving mode configuration, for facilitating re-synchronization of the second wireless transceiver device with the first wireless transceiver device in conjunction with an end of a sleep period of the second wireless transceiver device in accordance with the power saving mode configuration;
• and
• receive and/or transmit communications of the second wireless transceiver device via the D2D link, and wirelessly relay, via another wireless link, the communications of the second wireless transceiver device to provide the second wireless transceiver device with access to a radio access node of a cellular communication network,
• wherein the first wireless transceiver device is not the radio access node of the cellular communication network.

A non-transitory processor-readable storage medium comprising a computer program comprising computer program code which is able to, when run on processor circuitry of a second wireless transceiver device in a device-to-device (D2D) communication network supporting a wireless D2D link between the second wireless transceiver device and a first wireless transceiver device in the D2D network, cause the second wireless transceiver device to:

• transmit capability information to the first wireless transceiver device on wireless D2D communication resources;
• receive power saving information about a power saving mode configuration from the first wireless transceiver device, the power saving information comprising information about sleep periods and active periods of the second wireless transceiver device;
• enter a sleep period in accordance with the power saving mode configuration;
• in conjunction with an end of the sleep period, re-synchronize with the first wireless transceiver device by means of receiving a sync signal from said first wireless transceiver device;
• and
• when not in the sleep period, obtain access to a radio access node of a cellular communication network by receiving from the first wireless transceiver device and/or transmitting to the first wireless transceiver device communications of the second wireless transceiver device via the D2D link,
• wherein the first wireless transceiver device is not the radio access node of the cellular communication network.