Contact management for mobile communications devices in wireless packet switched networks

摘要

Techniques for use by a data communication device in maintaining communication with a packet-switched communication network which allows data to be pushed to the data communication device are described. One illustrative technique involves maintaining operation in a network coverage state associated with network coverage between the data communication device and the communication network while receiving a network signal that is above a predetermined adequate signal strength; further maintaining operation in a network coverage state associated with network coverage between the data communication device and the communication network while receiving a network signal that is below the predetermined adequate signal strength but successfully decoding one or more predetermined network messages; and maintaining operation in a network coverage loss state associated with network coverage loss between the data communication device and the communication network while failing to successfully decode one or more predetermined network messages. An update message may be transmitted to the communication network based on identifying the network coverage loss.