A client terminal (102, 402), comprising: a first communication interface (110, 410) for wirelessly communicating with an access point in a first mode; a second communication interface (114, 406) for wirelessly communicating with a proxy device (104, 602); and a processing circuit coupled to the first communication interface (110, 410) and the second communication interface (114, 406), wherein the client terminal is characterized in that the processing circuit is configured to operate in the first mode to monitor a data channel where the first communication interface (110, 410) is communicatively connected to the access point; send a request to the proxy device (104, 602) requesting it to operate as a proxy in the first mode by monitoring the data channel for the client terminal (102, 402) and forwarding data messages from the access point intended for the client terminal (102, 402) via the second communication interface (114, 406), wherein the data channel is different from a signaling/control channel; change to a second mode where the first communication interface (110, 410) is communicatively disconnected from the access point, without communicating this change to the access point; monitor the second communication interface (114, 406) in the second mode for forwarded data messages from the proxy device (104, 602); wherein the processing circuit is further configured to receive a wake-up signal from the proxy device (104, 602), the wake up signal indicating that data message for the client terminal (120, 402) will be forthcoming over the data channel; and switch to the first mode as a result of the wake-up signal. a first communication interface (110, 410) for wirelessly communicating with an access point in a first mode; a second communication interface (114, 406) for wirelessly communicating with a proxy device (104, 602); and a processing circuit coupled to the first communication interface (110, 410) and the second communication interface (114, 406), wherein the client terminal is characterized in that the processing circuit is configured to operate in the first mode to monitor a data channel where the first communication interface (110, 410) is communicatively connected to the access point; send a request to the proxy device (104, 602) requesting it to operate as a proxy in the first mode by monitoring the data channel for the client terminal (102, 402) and forwarding data messages from the access point intended for the client terminal (102, 402) via the second communication interface (114, 406), wherein the data channel is different from a signaling/control channel; change to a second mode where the first communication interface (110, 410) is communicatively disconnected from the access point, without communicating this change to the access point; monitor the second communication interface (114, 406) in the second mode for forwarded data messages from the proxy device (104, 602); wherein the processing circuit is further configured to receive a wake-up signal from the proxy device (104, 602), the wake up signal indicating that data message for the client terminal (120, 402) will be forthcoming over the data channel; and switch to the first mode as a result of the wake-up signal. operate in the first mode to monitor a data channel where the first communication interface (110, 410) is communicatively connected to the access point; send a request to the proxy device (104, 602) requesting it to operate as a proxy in the first mode by monitoring the data channel for the client terminal (102, 402) and forwarding data messages from the access point intended for the client terminal (102, 402) via the second communication interface (114, 406), wherein the data channel is different from a signaling/control channel; change to a second mode where the first communication interface (110, 410) is communicatively disconnected from the access point, without communicating this change to the access point; monitor the second communication interface (114, 406) in the second mode for forwarded data messages from the proxy device (104, 602); wherein the processing circuit is further configured to receive a wake-up signal from the proxy device (104, 602), the wake up signal indicating that data message for the client terminal (120, 402) will be forthcoming over the data channel; and switch to the first mode as a result of the wake-up signal.