Hytera Communications Corporation Limited

Zhenghua Luo

Xing Liu

Liang Zhang

Yan Xu

Yingzhe Zhang

Chia Han Siong Samuel

Samuel Han Siong Chia

Yang Yu

Fan Yang

Jingjing Zhang

Chengfu Huang

Yuwang Tan

Jianliang Liu

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.

Wireless system access control method and device

A method of data communication includes: determining, by a first terminal, an idle channel, and transmitting a data handshake request carrying interruption information on the idle channel, wherein the interruption information at least includes an indication for interrupting a call of a traffic channel; receiving a data handshake response transmitted by a repeater; when the data handshake response is of a type allowing interruption, jumping to the traffic channel designated by the repeater according to a channel jumping indication included in the data handshake response; and when determining that a second terminal occupying the traffic channel making the call interrupts the call and releases a resource of the traffic channel, initiating a call on the traffic channel. The embodiments of the present invention can interrupt the call of the transmitting terminal and release the channel resource, and have strong flexibility and high efficiency.

Data communication method, apparatus and system

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.

Mobile station, repeater, trunking communication system and method therefor

Disclosed are a communication method based on a time division multiple access communication system, and a terminal. The method comprises: receiving, by a communication terminal, an embedded signalling frame, conducting embedded type information parsing on the embedded signalling frame to obtain an embedded signalling and control information; in accordance with the control information, caching, by the communication terminal, the embedded signalling to corresponding caching regions; and when each corresponding caching region has already been cached with the embedded signalling, conducting embedded type signalling decoding, by the communication terminal, on the embedded signalling in all the caching regions so as to obtain a control signalling. The technical solution of the present invention can shorten the terminal access duration of the time division multiple access communication system, thereby improving the access performance of the time division multiple access communication system.

Communication method based on time division multiple access communication system, and terminal

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. It can be seen that, whether the relay station is in the abnormal state is determined by detecting whether the signal strength of the downlink channel meets the preset threshold, and sequentially, the working mode is switched between the relaying mode and the offline mode in a targeted manner, so that when the relay station is in the abnormal state, the receiving frequency of the downlink channel is used as the sending frequency for sending signals, so as to ensure that other mobile stations are capable of receiving the sent signals, and the rate of call loss is lowered.

Communication mode switching method and device

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. Furthermore, the target control information of the present invention is not set completely by Customer Program Software (CPS), it also can be set according to the human-computer interface operation, the transmission time of the monitored party is controlled agilely.

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Guangdong, China

Zhenghua Luo