Method for facilitating synchronisation between a communications network and a wireless communications device operating in a CPC DTX mode and a wireless communications device

摘要

A method for facilitating synchronization between a communications network (102) and a wireless communications device (104, 106, 200) operating in a Continuous Packet Connectivity, CPC, discontinuous transmission, DTX, mode, comprises monitoring (304) at the wireless communications device (104, 106, 200) the radio conditions of downlink communications using control bits received from the communications network (102) to determine when the wireless communications device (104, 106, 200) is at a nearly out of synchronization state with the communications network (102). In response to determining the wireless communications device (104, 106, 200) is at a nearly out of synchronization state, the wireless communications device (104, 106, 200) sends (310) to the communications network (102), additional control information on a control channel. The wireless communications device (104, 106, 200) receives (312) additional control bits sent by the communications network (102) in response to the communications network (102) receiving the additional control information sent by the wireless communications device (104, 106, 200).

主权项

1. A method for facilitating synchronization between a communications network and a wireless communications device operating in a Continuous Packet Connectivity, CPC, discontinuous transmission, DTX, mode, the method comprising:
monitoring at the wireless communications device the radio conditions of downlink communications using control bits received from the communications network; determining, based on said monitoring, a first average quality of control bits received in a first number of time slots and a second average quality of control bits received in a second number of time slots, which is greater than the first number of time slots; determining the wireless communications device is at a nearly out of synchronization state with the communications network if the first average quality is below a threshold and determining the wireless communications device is at an out of synchronization state with the communications network if the second average quality is below the threshold; sending, by the wireless communications device to the communications network, control information on a control channel at a first rate; in response to determining the wireless communications device is at a nearly out of synchronization state, sending, by the wireless communications device to the communications network, control information on the control channel at a second rate that is greater than the first rate, sending the control information at the second rate to include sending additional control information with at least some of the additional control information associated with empty logical link control (LLC) frames; and receiving, at the wireless communications device, additional control bits sent by the communications network in response to the communications network receiving the additional control information sent by the wireless communications device.