A method for integrating a cellular network and a ubiquitous network including ubiquitous terminals with low transmitting power, wherein a communication between a mobile terminal and a base station is a duplex communication, wherein the ubiquitous network and the cellular network are combined in a predefined communication mode, wherein the mobile terminal in the cellular network communicates with a ubiquitous terminal by random accessing, polling or reservation, and wherein the method comprises the steps of: (a) after receiving reservation requests from all the mobile terminals, each reservation request containing a number of uplink reservation packets for a mobile terminal, the base station allocates an uplink resource for each mobile terminal, counts the resources available to the ubiquitous network, generates an uplink resource allocation information for the mobile terminal and the ubiquitous terminal, and transmits the uplink resource allocation information in a downlink channel to notify each mobile terminal of the uplink resource (201, 601) and the resource (202, 602) available to the ubiquitous network; (b) if there are packets to be transmitted by a mobile terminal: the mobile terminal generates the reservation request, and the mobile terminal transmits uplink packets using the uplink resource (201, 601); and (c) if there are no packets to be transmitted by a mobile terminal: the mobile terminal transmits a notification of the resource (202, 602) available for the ubiquitous network to ubiquitous terminals of the ubiquitous network, after receiving the notification, the ubiquitous terminal starts the communication with the mobile terminal, and the mobile terminal receives packets from the ubiquitous terminal, processes the received packets, and stores the packets to be transferred to the base station in a buffer, and the mobile terminal determines whether there are packets to be transmitted to the base station at an uplink resource of a next frame, wherein, in case the predefined communication mode is time division multiplexing, the uplink resource is an uplink slot, the resource available to the ubiquitous network is a slot, and the notification indicates the start and end slots of the resource available for the ubiquitous network, the notification transmitted to the communication terminals when the slot begins, and wherein, in case the predefined communication mode is frequency division multiplexing, the uplink resource is an uplink frequency band, the resource available to the ubiquitous network is a frequency band, and the notification is transmitted to the ubiquitous terminals at the frequency band available for the ubiquitous network. (a) after receiving reservation requests from all the mobile terminals, each reservation request containing a number of uplink reservation packets for a mobile terminal, the base station allocates an uplink resource for each mobile terminal, counts the resources available to the ubiquitous network, generates an uplink resource allocation information for the mobile terminal and the ubiquitous terminal, and transmits the uplink resource allocation information in a downlink channel to notify each mobile terminal of the uplink resource (201, 601) and the resource (202, 602) available to the ubiquitous network; (b) if there are packets to be transmitted by a mobile terminal: the mobile terminal generates the reservation request, and the mobile terminal transmits uplink packets using the uplink resource (201, 601); and the mobile terminal generates the reservation request, and the mobile terminal transmits uplink packets using the uplink resource (201, 601); and (c) if there are no packets to be transmitted by a mobile terminal: the mobile terminal transmits a notification of the resource (202, 602) available for the ubiquitous network to ubiquitous terminals of the ubiquitous network, after receiving the notification, the ubiquitous terminal starts the communication with the mobile terminal, and the mobile terminal receives packets from the ubiquitous terminal, processes the received packets, and stores the packets to be transferred to the base station in a buffer, and the mobile terminal determines whether there are packets to be transmitted to the base station at an uplink resource of a next frame, the mobile terminal transmits a notification of the resource (202, 602) available for the ubiquitous network to ubiquitous terminals of the ubiquitous network, after receiving the notification, the ubiquitous terminal starts the communication with the mobile terminal, and the mobile terminal receives packets from the ubiquitous terminal, processes the received packets, and stores the packets to be transferred to the base station in a buffer, and the mobile terminal determines whether there are packets to be transmitted to the base station at an uplink resource of a next frame,