Patent application number | Description | Published |
20080212519 | Method for Establishing a Call Rapidly in Cdma Cluster Communication System - A method for establishing a call rapidly in a cluster communication system based on code division multiple access, comprising the following steps: a dispatching station server transmitting a normal group call request to a base station subsystem after receiving a normal group call request sent by a calling terminal; the each base station in a dispatching area allocating resource and establishing a forward-reverse traffic channel required by a normal group call service in the base station side after receiving the normal group call request; each sector of the base station in the dispatching area sending a broadcast channel assignment message in a form of broadcast message to the terminals in an idle state in the sector in a forward control channel; the terminals in the sector comparing a broadcast address with a group identification stored, if matching, the terminal establishing each service channel in the side of the terminal in the called state according to the broadcast channel assignment message received; if the broadcast address not matching the group identification stored, the terminal discarding the broadcast channel assignment message. | 09-04-2008 |
20080268891 | Method and Device for Power Overload Control of the Trunking Group Forword Supplimental Channel - A method and device for power overload control of the trunking group forward supplimental channel are disclosed, the method includes: reducing or increasing the higher limit of forward supplimental channel transmitting power of the sector trunking group users correspondingly based on whether the sector power is overload, and setting it as the target maximum transmitting power of the trunking group forward supplimental channels; dividing the trunking group users into groups based on the channel board, and determining the adjusting step size based on the ratio between the trunking group combining transmitting power of the users divided and the forward supplimental channel shared transmitting power of the sector trunking group, and the comparison between the forward supplimental channel shared transmitting power of the sector trunking group and the target maximum transmitting power of the trunking group forward supplimental channels, and adjusting the higher limit of the forward supplimental channel transmitting power of sector trunking group based on the adjusting step size. The invention solves the problem of the trunking group calling forward supplimental channel shared transmitting power overloads caused by nonlinear addition of the trunking group calling forward supplimental channel shared transmitting power. | 10-30-2008 |
20080316991 | Control Method for Reaccessing After the Terminal in the Trunked System Has Existed the Group Call - The present invention relates to a control method for re-access after the terminal in the trunking system exits the group call, which includes the following steps: it is to maintain one message number for every group call for updating and send the message number to the terminal when the call is established, and the terminal retains the message number after accessing the call; the terminal sets the exit symbol as “unable to passively access” when it exits the call normally, and as “able to passively access” when it exits the call abnormally; after the terminal has received periodically transmitted paging message in its idle state, it judges whether the exit symbol of the corresponding group is the type of “able to passively access”, if yes, it accesses the call and then the procedure end; if the exit symbol is “unable to passively access”, then the terminal judges whether the message number retained in the group is the same as the message number in the paging message, if not, it accesses the call, otherwise discards the paging message. According to the present invention, the terminal will not passively re-access the call because of receiving the periodical paging message after normally exiting the call, and at the same time, the terminal can re-access the call after abnormally exiting the call. | 12-25-2008 |
20090036118 | Channel sharing method in the cluster mobile communication system based on cdma - A channel sharing method of trunking mobile communication system based on CDMA comprises the following steps: a base station subsystem allocates a forward voice sharing channel for all the mobile stations within a group; the base station subsystem allocates a forward signaling sharing channel for all the mobile stations of the same cell within this group; the base station subsystem allocates a reverse dedicated voice channel for all the talking mobile stations within this group; the base station subsystem allocates a reverse signaling sharing channel for all the listening mobile stations of the same cell within this group. By using the signaling sharing method of present invention, the calling characteristic of the trunking communication system and the code division resources of CDMA can be used effectively, and thereby under the premise of maintaining the voice quality of the trunking mobile communication system, it greatly decreases the demand for channel resources and reduces interference of air channels, as well as increases the capacity of the system. | 02-05-2009 |
20100105371 | METHOD FOR ADDRESSING BROADCAST MESSAGE IN TRUNK SYSTEM - The method of present invention is used for addressing broadcast message in trunk system, in which said trunk system includes base station, mobile station. Said method includes the following steps: adding a index of trunk broadcast time slot newly, all the mobile station that support boundless capacity group call service monitor these trunk broadcast time slots; the paging message of the boundless capacity group call transmitted by said base station is sent in the trunk broadcast time slot, which uses the group identification as the broadcast address, and address according to the group identification, not address to a single mobile station. The method of present invention efficiently solves the problem for the paging channel capacity limitation of boundless capacity group call service supported by CDMA trunk telecommunication system, and greatly shorten the time of group call connection. | 04-29-2010 |