US 10,485,039 B2
Devices and methods for D2D communication
Liang Hu, Shenzhen (CN); Chan Zhou, Munich (DE); and Markus Martin Dillinger, Munich (DE)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen, Guangdong (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Shenzhen, Guangdong (CN)
Filed on Jan. 5, 2018, as Appl. No. 15/862,920.
Application 15/862,920 is a continuation of application No. PCT/EP2015/065374, filed on Jul. 6, 2015.
Prior Publication US 2018/0192462 A1, Jul. 5, 2018
Int. Cl. H04W 76/14 (2018.01); H04W 8/00 (2009.01); H04W 92/18 (2009.01); H04W 76/23 (2018.01); H04W 88/04 (2009.01); H04W 72/04 (2009.01); H04W 84/18 (2009.01)
CPC H04W 76/14 (2018.02) [H04W 8/005 (2013.01); H04W 76/23 (2018.02); H04W 88/04 (2013.01); H04W 92/18 (2013.01); H04W 72/0406 (2013.01); H04W 84/18 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A communication device outside a coverage area of a cellular communication network, configured to perform a device to device communication with a plurality of further communication devices using a second frequency band,
wherein the communication device is configured to receive a control message from a further communication device of the plurality of communication devices, the control message indicating that the further communication device is within the coverage area of the cellular communication network;
wherein the communication device is further configured to, upon reception of said control message, start listening for messages from further communication devices of the plurality of communication devices using a first frequency band;
wherein the communication device is configured to, as long as the communication device does not receive the control message, communicate with the further communication devices using a communication frame having a first control channel format, the first control channel format offering only communication resources for an ad-hoc communication mode; and
wherein the communication device is further configured to, upon reception of the control message, communicate with the further communication devices using a communication frame having a second control channel format, the second control channel format offering communication resources for an ad-hoc communication mode and a network assisted communication mode.