Abstract: A method and device for communication based on a trunking system. A first repeater sends an identifier of a free repeater and state information of the first repeater to a terminal, the free repeater being a repeater designated from repeaters which are of pre-set type having at least one idle timeslot channel; when the terminal analyses the state information of the first repeater to find that the first repeater has an idle timeslot channel, and a pre-set main repeater is the first repeater, the terminal uses the first repeater to perform communication; and when the terminal analyses the state information of the first repeater to find that all timeslot channels of the first repeater are occupied, if the terminal does not participate in data communication of the first repeater, the terminal accesses the free repeater to perform communication.

Abstract: The present invention provides a positioning information transmission method and communication device. In an embodiment of the present invention, a transmitting end transforms original positioning information into original integer positioning information; then compresses the original integer positioning information into compressed positioning information according to an application precision unit and an original unit of least precision; and afterwards, intercepts lower N bits as simplified positioning information from the number of bits corresponding to the compressed positioning information, wherein the simplified positioning information is a bit distinguishing from positioning information of a receiving end, so that the transmitting end only transmits the simplified positioning information that could be restored to the receiving end.

Abstract: A wireless access control method and device are provided. A method applied to a sender terminal includes: generating, by a terminal, an authentication code according to a protocol negotiated with a receiver when sending control-type data, combining, by the terminal, control-type data, the authentication code and a corresponding CRC check code to generate a message, and sending, by the terminal, the message to the receiver, such that the receiver can perform a CRC check on the received message, generates an authentication code according to the negotiated protocol if the CRC check is successful, determines whether the generated authentication code is the same as the received authentication code, if so, analyzes the received control-type data, and if not, discards the received control-type data.

Abstract: Disclosed are a data pull-up method for dynamically allocating an uplink channel, a communication terminal, and a communication device. The method includes: sending, by a communication device, a pull-up signaling to at least one communication terminal, the pull-up signaling comprising an uplink channel, a time slot, and a pull-up policy allocated by the communication device; receiving, by the communication device, data uploaded by the at least one communication terminal using the uplink channel on the time slot according to the pull-up policy, the data comprising feature information of a subsequent pull-up, and the feature information being used for the communication device to adjust at least one of a subsequent pull-up time and a subsequent pull-up policy. By such means, the present invention improves an activation process flow, can greatly increase channel utilization rate and data pull-up capacity, and improves data pull-up use effects.

Abstract: A communication method for a mobile station comprises: monitoring broadcast information sent by a currently-residing repeater, wherein the broadcast information carries state information of repeaters within a site and call related information, and a main repeater of the mobile station belongs to the site; acquiring a state of the main repeater according to the broadcast information; determining whether there is a call belonging to the mobile station according to the call related information; and when determining that there is a call belonging to the mobile station, performing handover, according to the call related information, to a repeater corresponding to the call belonging to the mobile station to access the call.

Abstract: Methods for abnormality protection on an extended trunked radio system and associated repeater stations are provided. A method includes: monitoring, by a present repeater, in real time whether there occurs a communication abnormality on a repeater in a local site; if there is detected a communication abnormality on a repeater, determining whether the abnormal repeater is a free repeater; and if the abnormal repeater is a non-free repeater, updating and broadcasting the state information of the abnormal repeater.

Abstract: A communication establishment method, mobile station and transfer device based on transfer mode. The method comprises: a first mobile station sends to the transfer device control information including the slot used by the first mobile station and the control signalings corresponding to different service types, in order that the transfer device determines a transfer slot and gets ready for communication according to the control signalings; and the first mobile station communicates with a target mobile station group through the transfer slot. The transfer device can accurately acquire the slot used by the mobile station, thus reducing communication error rate and solving the problem that the transfer device can not identify the slot in the use of the mobile station and can not support delayed access. Meanwhile, the technical solution can be compatible with existing transfer device and mobile station.

Abstract: The present invention provides a positioning information transmission method and communication device. In an embodiment of the present invention, a transmitting end transforms original positioning information into original integer positioning information; then compresses the original integer positioning information into compressed positioning information according to an application precision unit and an original unit of least precision; and afterwards, intercepts lower N bits as simplified positioning information from the number of bits corresponding to the compressed positioning information, wherein the simplified positioning information is a bit distinguishing from positioning information of a receiving end, so that the transmitting end only transmits the simplified positioning information that could be restored to the receiving end.

Abstract: Disclosed are a data pull-up method for dynamically allocating an uplink channel, a communication terminal, and a communication device. The method includes: sending, by a communication device, a pull-up signaling to at least one communication terminal, the pull-up signaling comprising an uplink channel, a time slot, and a pull-up policy allocated by the communication device; receiving, by the communication device, data uploaded by the at least one communication terminal using the uplink channel on the time slot according to the pull-up policy, the data comprising feature information of a subsequent pull-up, and the feature information being used for the communication device to adjust at least one of a subsequent pull-up time and a subsequent pull-up policy. By such means, the present invention improves an activation process flow, can greatly increase channel utilization rate and data pull-up capacity, and improves data pull-up use effects.

Abstract: A call collision processing method, a terminal and a repeater are disclosed according to the disclosure. The method includes: sending, by a terminal, an access request to a repeater, where the access request includes a preset number of access request bursts; monitoring, by the terminal, a channel state of the repeater, and determining, by the terminal, whether the repeater transfers the access request burst within a preset period of monitoring time; sending, by the terminal, subsequent bursts to the repeater if the repeater successively transfers the access request bursts of the terminal for at least two times within the preset period of monitoring time; and stopping sending, by the terminal, the subsequent bursts to the repeater if the repeater successively transfers access request bursts of another terminal for at least two times within the period of the preset monitoring time.

Abstract: A method and device for communication based on a trunking system. A first repeater sends an identifier of a free repeater and state information of the first repeater to a terminal, the free repeater being a repeater designated from repeaters which are of pre-set type having at least one idle timeslot channel; when the terminal analyses the state information of the first repeater to find that the first repeater has an idle timeslot channel, and a pre-set main repeater is the first repeater, the terminal uses the first repeater to perform communication; and when the terminal analyses the state information of the first repeater to find that all timeslot channels of the first repeater are occupied, if the terminal does not participate in data communication of the first repeater, the terminal accesses the free repeater to perform communication.

Abstract: A wireless access control method and device are provided. A method applied to a sender terminal includes: generating, by a terminal, an authentication code according to a protocol negotiated with a receiver when sending control-type data, combining, by the terminal, control-type data, the authentication code and a corresponding CRC check code to generate a message, and sending, by the terminal, the message to the receiver, such that the receiver can perform a CRC check on the received message, generates an authentication code according to the negotiated protocol if the CRC check is successful, determines whether the generated authentication code is the same as the received authentication code, if so, analyzes the received control-type data, and if not, discards the received control-type data.

Abstract: A communication method for a mobile station comprises: monitoring broadcast information sent by a currently-residing repeater, wherein the broadcast information carries state information of repeaters within a site and call related information, and a main repeater of the mobile station belongs to the site; acquiring a state of the main repeater according to the broadcast information; determining whether there is a call belonging to the mobile station according to the call related information; and when determining that there is a call belonging to the mobile station, performing handover, according to the call related information, to a repeater corresponding to the call belonging to the mobile station to access the call.

Abstract: A communication mode switching method and device. The method comprises: receiving a sending request; detecting whether the radio-frequency signal strength of a downlink channel meets a first threshold; when the radio-frequency signal strength is greater than or equal to the first threshold, determining that a relay station is in a working state, and keeping a relaying mode to finish the sending request; when the radio-frequency signal strength is less than the first threshold, determining that the relay station is in an abnormal state, and switching to an offline mode to finish the sending request, the offline mode specifically being to perform sending after regulating the sending frequency to be the receiving frequency of the downlink channel.

Abstract: Methods for abnormality protection on an extended trunked radio system and associated repeater stations are provided. A method includes: monitoring, by a present repeater, in real time whether there occurs a communication abnormality on a repeater in a local site; if there is detected a communication abnormality on a repeater, determining whether the abnormal repeater is a free repeater; and if the abnormal repeater is a non-free repeater, updating and broadcasting the state information of the abnormal repeater.

Abstract: A realization method, apparatus and system for remote monitoring, the remote monitoring technique is used between interphones, which includes the following contents: a monitored party receives a remote monitoring request from a monitoring party, the remote monitoring request includes a target control information; the monitored party answers confirming information to the monitoring party after receiving the remote monitoring request successfully, and analyzes the target control information, and then selects transmission mode; the monitored party enters monitored state, starts transmission automatically, and implements the transmission according to the selected transmission mode. Applying the embodiments of the present invention, the remote monitoring function of a interphone will be improved, and the monitoring party can initiatively control the transmission time of the monitored party; or transmission interval and times of the monitored party, so as to realize the repeat monitoring is realized.

Abstract: A communication establishment method, mobile station and transfer device based on transfer mode. The method comprises: a first mobile station sends to the transfer device control information including the slot used by the first mobile station and the control signalings corresponding to different service types, in order that the transfer device determines a transfer slot and gets ready for communication according to the control signalings; and the first mobile station communicates with a target mobile station group through the transfer slot. The transfer device can accurately acquire the slot used by the mobile station, thus reducing communication error rate and solving the problem that the transfer device can not identify the slot in the use of the mobile station and can not support delayed access. Meanwhile, the technical solution can be compatible with existing transfer device and mobile station.

Abstract: A call collision processing method, a terminal and a repeater are disclosed according to the disclosure. The method includes: sending, by a terminal, an access request to a repeater, where the access request includes a preset number of access request bursts; monitoring, by the terminal, a channel state of the repeater, and determining, by the terminal, whether the repeater transfers the access request burst within a preset period of monitoring time; sending, by the terminal, subsequent bursts to the repeater if the repeater successively transfers the access request bursts of the terminal for at least two times within the preset period of monitoring time; and stopping sending, by the terminal, the subsequent bursts to the repeater if the repeater successively transfers access request bursts of another terminal for at least two times within the period of the preset monitoring time.

Abstract: A communication mode switching method and device. The method comprises: receiving a sending request; detecting whether the radio-frequency signal strength of a downlink channel meets a first threshold; when the radio-frequency signal strength is greater than or equal to the first threshold, determining that a relay station is in a working state, and keeping a relaying mode to finish the sending request; when the radio-frequency signal strength is less than the first threshold, determining that the relay station is in an abnormal state, and switching to an offline mode to finish the sending request, the offline mode specifically being to perform sending after regulating the sending frequency to be the receiving frequency of the downlink channel.

Abstract: A realization method, apparatus and system for remote monitoring, the remote monitoring technique is used between interphones, which includes the following contents: a monitored party receives a remote monitoring request from a monitoring party, the remote monitoring request includes a target control information; the monitored party answers confirming information to the monitoring party after receiving the remote monitoring request successfully, and analyzes the target control information, and then selects transmission mode; the monitored party enters monitored state, starts transmission automatically, and implements the transmission according to the selected transmission mode. Applying the embodiments of the present invention, the remote monitoring function of a interphone will be improved, and the monitoring party can initiatively control the transmission time of the monitored party; or transmission interval and times of the monitored party, so as to realize the repeat monitoring is realized.