Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L12/00—Data switching networks
  • H04L12/02—Details
  • H04L12/16—Arrangements for providing special services to substations
  • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
  • H04L12/189—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast in combination with wireless systems

Definitions

• the present invention relates to the field of wireless communications, and in particular, to a method for adjusting a call area by a network, and a group call method and apparatus.
• Group Calls With half-duplex communication, multiple users can participate in one call at a time.
• the first is conference telephony and the second is shared channel technology.
• the fundamental difference between the two group call technologies is the way in which the channels are used differently.
• a group ID is defined in the system in advance, and the group ID is used to identify the group user; and the call area corresponding to the group ID is saved, and is described by a series of cells.
• the system determines the call area according to the group ID and the location where the caller initiates the call, and broadcasts a call notification in the cell included in the call area, and belongs to the cell.
• Members of the group ID can join the call.
• the shared channel technology establishes a call according to the calling area, and broadcasts a call notification in a cell included in the calling area, and the setup time is short, which is far lower than the time when the point-to-point call is established. Moreover, channels are allocated according to d, Cell, and members of the same cell and belonging to the group ID share one channel.
• the call area is manually pre-configured in the system. This is appropriate for the situation where the user or user location of the cluster private network is relatively stable. For example, in railway traffic dispatch applications, station attendants need to use voice to notify an event to a locomotive driver near their station. In this case, the railway can be divided into multiple areas, each group call is limited to a certain range, such as the vicinity of the station, or a management role is responsible for the scope of jurisdiction. This area is pre-defined in the system. For the same group ID, different areas can be defined according to the location of the initiator.
• the pre-configured call area is used, and the entire city area needs to be matched. Set to the call area, this will broadcast notification messages throughout the city, and most of the cells do not have members of the group, resulting in a serious waste of system resources.
• the resources used to broadcast communication messages in the actual network are very limited, so the group call service implemented in the manner described is not suitable for users with a large range of activities.
• the present invention is directed to a method and a group call method and apparatus for providing a network adjustment call area, which expands a group call range to a larger range without excessively occupying channel resources of a broadcast call notification.
• An embodiment of the present invention discloses a method for adjusting a call area by a network, including the following steps: acquiring location information of a group call member;
• the location information of the group call member in the call area information is updated.
• An embodiment of the present invention further discloses a method for group call, including the following steps: acquiring location information of a group call member;
• location information is different from the location information of the call member in the pre-stored call area information, updating the location information of the group call member in the call area information;
• An embodiment of the present invention includes a group call network device, including a location information storage module, configured to save call area information of a group call member, and further includes:
• a location information obtaining module configured to acquire location information of a group call member
• a location information update module configured to acquire location information of the group call member from the location information acquisition module and the location information storage module, the location information acquired by the location information acquisition module, and the call area saved in the location information storage module When the location information of the group call member in the information is different, the location information of the group call member in the call area information of the location information saving module is updated.
• the method for dynamically adjusting the network call area enables the group call area to be dynamically adjusted and updated according to the location change of the group members, and is not for the group call members with a relatively large active range. It is necessary to set all of its possible range of activities to the calling area, and only setting the actual range of activities to the calling area will greatly reduce the range of the calling area. Thereby, the group call established based on the dynamically adjusted call area saves a lot of system resources. Thus the group can be The call range is expanded to a larger extent, and the channel resources of the broadcast call notification are not occupied, and the group call requirement of the large-scale mobile user group is solved.
• FIG. 1 is a flow chart 1 of a network adjustment call area according to an embodiment of the present invention.
• Figure 3 is a group call flow chart 2 of an embodiment of the present invention.
• FIG. 4 is a flowchart 1 of a group call late access according to an embodiment of the present invention.
• FIG. 5 is a flowchart 2 of a group call late access according to an embodiment of the present invention.
• FIG. 6 is a flowchart 3 of a group call late access according to an embodiment of the present invention.
• the method for adjusting a call area by a network includes the following steps: acquiring location information of a group call member; if the location information is different from location information of the call member in the pre-stored call area information, updating the call area The location information of the group call member in the message.
• a flow chart 1 of a network adjustment call area includes the following steps:
• the mobile terminal (MS) of the group call member reports the location information to the network side in the location update request message or the call management type service request message;
• the call management type service request includes but is not limited to: a call access request, a short message access request, Unstructured Supplementary Data Service (USSD) access request, handover request, and paging response;
• the network side compares the location information with the location information pre-stored in the network side, determines that the location area of the group call member changes, and updates the group. Calling area information of the group where the calling member is located.
• USSD Unstructured Supplementary Data Service
• the network side can periodically page the group call member and ask the group call member to have its location information.
• the network side compares the location information with the location information pre-stored in the network side, determines that the location area of the group call member changes, and updates the call area information of the group in which the group call member is located.
• the method for group call includes the following steps: acquiring location information of a group call member; if the location information is different from location information of the call member in the pre-stored call area information, updating the call area information The location information of the group call member in the group; the group call is made according to the updated call area information.
• FIG. 2 is a group call flow chart 1 of the present invention. The process includes the following steps: a mobile terminal (MS) of a group call member initiates a group call access request, and a network side queries a call area information updated in real time. , sending the call area information to the base station subsystem by using the assignment message
• the BSS first assigns a wireless channel and then broadcasts a call notification category to the cells included in the calling area.
• the call notification category 1 contains the above channel description
• FIG. 3 is a group call flow diagram 2 of the present invention.
• the process includes the following steps: a mobile terminal (MS) of a group call member initiates a group call access request message to the network side;
• the real-time updated call area information, the call area information is sent to the base station subsystem BSS through the assignment message;
• the BSS broadcasts a call notification category 2 to a cell included in the call area, and when a user response in a certain cell is received, assigns a wireless channel, and then broadcasts a call notification category 1 in the cell, and the call notification category 1 includes the
• the channel description, the user belonging to the group ID can access the group call according to the channel description in the call notification. For cells that do not have a user response, the wireless channel is not allocated at all times.
• the call notification may be a non-periodic broadcast or a periodic broadcast.
• the call notification is a non-periodic broadcast
• the user entering the group call area may not receive the broadcast notification message, and cannot access the ongoing group call, and the user's late access should be allowed.
• the application scenarios that are entered later are: The user is in the process of calling, and should be late to enter the group call after the call ends; the user automatically joins the group call after the cell reselection in the group call and the cell switch; Sign up for the activation group and select the function to enter the group call.
• the specific process is as follows:
• FIG. 4 is a flowchart of a group call late access according to the present invention.
• the process is a late access after the user location is updated, and specifically includes the following steps:
• the mobile terminal After the group call, the mobile terminal (MS) initiates a location update request;
• the Mobile Switching Center processes the location update request message
• the MSC determines that the user is a legitimate user, sends a location update accept message to the user, and checks whether the group call subscribed by the user has an active group call; at this time, if the MSC determines that the user is an illegal user or the authentication fails (if any) The authentication process) sends a location update rejection message to the user. If there is an active group call, send a message to the base station controller (BSC), request the BSC to notify the user to access the updated cell in the user location, and the BSC determines whether the group call corresponding group call channel is already available:
• BSC base station controller
• the group call notification message without channel description is sent on the NCH channel, and the number of times of sending may be one time, multiple times or periodically; after the user responds, the wireless channel is assigned, and the group call with the channel description is concurrently sent. Notifications, the number of times sent can be one time, multiple times, or sent periodically.
• the group call notification message with the channel description is directly sent on the NCH channel (the number of times of transmission may be one time, multiple times or periodically);
• the mobile terminal listens to the channel description information in the notification message on the NCH channel and accesses the corresponding group call.
• FIG. 5 is a flowchart 2 of a group call late access according to the present invention.
• the process is a late access after the call is terminated, and specifically includes the following steps:
• the MSC receives the call release message, ends the call, and checks whether there is an active group call in the group call subscribed by the user;
• the group call notification message without channel description is sent on the NCH channel, and the number of times of sending may be one time, multiple times or periodically; after the user responds, the wireless channel is assigned, and the group call with the channel description is concurrently sent. Notification, the number of times of sending can be one time, multiple times or periodically;
• the group call notification message with the channel description is sent directly on the NCH channel, and the number of times of sending may be one time, multiple times or periodically.
• the mobile terminal listens to the channel description information in the notification message on the NCH channel and accesses the corresponding group call.
• FIG. 6 is a late call access process of the group call according to the present invention.
• the process is a cell reselection, a quit other group call, and a late access of the active query activation group, and specifically includes the following steps:
• the system actively determines the cell in which the system user is located and the current group call. The system determines whether the group call is in the active state. If the user is in the active state, the group call notification is sent to the user. After the user voluntarily quits the other group call, the system promptly informs the system user of the cell and the current group call. The system determines whether there is an active group in all the group calls subscribed by the user. If there is (except the current group call), the system broadcasts the group call. The notification message requires the terminal to access.
• the broadcast notification message policy can be defined by the system, for example, only one group with the highest priority or a notification message for broadcasting several groups can be broadcast.
• the user can actively query whether the self-signed group call is in the active state.
• the system determines whether there is an active group in all the group calls subscribed by the user.
• the broadcast group call notification message requires the terminal to access.
• the user is allowed to access later, and the success rate of the user access group call can be improved when the non-periodic broadcast group call notification message is used, and the periodic broadcast group call notification message is not entered on the NCH channel, and the PCH channel is saved.
• the paging block on.
• the invention also includes a network device for group call, comprising: a location information saving module, configured to save call area information of a group call member; and a location information obtaining module, configured to acquire location information of the group call member a location information update module, configured to acquire location information of the group call member from the location information acquisition module and the location information storage module, location information acquired by the location information acquisition module, and call area information saved in the location information storage module When the location information of the group call members in the difference is different, the call area information of the location information saving module is updated.
• the location obtaining module is further configured to store location information of the group call member.
• the location information acquisition module, the location information storage module, or the location information update module may be located in the same entity or may be located in different entities.
• the network device called by the group may be a separate physical entity; or it may be a module in another physical entity.
• the MSC When the group call device is located in the mobile switching center MSC, and the MSC receives the request information including the location information, the location update request information, or the paging response information, obtains the location information carried therein, when the acquired location information and the saved location information When the location information of the group call member in the call area information is different, the location information of the group call member in the call area information is updated.
• the apparatus and method for providing a group call and the method for dynamically adjusting a call area of the present invention expand the group call range to a larger range without excessively occupying channel resources of the broadcast call notification.
• the spirit and scope of the Ming Thus, it is intended that the present invention cover the modifications and the modifications

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• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Signal Processing (AREA)
• Mobile Radio Communication Systems (AREA)

Applications Claiming Priority (2)

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Cited By (1)

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• 2006
  • 2006-12-31 CN CNA200610063773XA patent/CN101013947A/zh active Pending
• 2007
  • 2007-12-14 WO PCT/CN2007/071231 patent/WO2008092354A2/fr not_active Ceased

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