WO2006079285A1

WO2006079285A1 - A method and apparatus for the users engaged in group call to receive short message

Info

Publication number: WO2006079285A1
Application number: PCT/CN2006/000143
Authority: WO
Inventors: De Chen
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2005-01-31
Filing date: 2006-01-25
Publication date: 2006-08-03
Also published as: CN1816202A; CN100455107C

Abstract

The present invention is a method for the users engaged in group call to receive short message. It comprises: when the network side decides to send the short message to the users engaged in group call, for the users which have connection with the network side, sends the short message to the users directly via the connection for the users which have not connection with the network side, then initiating a paging ,and after the paging response information returned by the users have been received , sending the short message to the user. The present invention provides the method for users of different pattern and engaged in group call to receive short message, therefore, the present invention can provide the group call user to receive short message in time, and avoid the case of short message being discard due time over, therefore improve the reliability of the traffic communication in the wireless communication network.

Description

Method and device for receiving short message by user in group call call

The present invention relates to the field of network communication technologies, and in particular, to a method for a user in a group call to receive a short message.

Background technique

Cluster wireless communication system, referred to as cluster system, is a more economical and flexible command and dispatch communication system developed in recent years. It is widely used in government agencies, energy transportation, airport terminals, industrial and mining enterprises, fire police, water conservancy and military. And other units to meet the needs of internal communications within each unit.

In the current trunking communication system, each group includes a group ID (identification) and a group call area, where the group call area is defined as a group of cells. However, this information is fixed information stored in the HLR (Home Location Register) and SIM (Subscriber Identity Module) cards at the time of account opening, and mobility management for group call users is not implemented.

The structure of the cluster system core network is shown in Figure 1. The home location register HLR stores user information, including the user IMSI (International Mobile Subscriber Identity), and the group ID list to which it belongs. Usually, a user can belong to up to 50 groups. The gateway mobile switch GMSC is connected to the external network External. The GMSC is also coupled to an anchor mobile switching center Anchor MSC (an MSC) that is responsible for managing and maintaining a particular VGCS (voice group call service).

The Relay MSC in Figure 1 is all MSCs except the anchor MSC when hopping multiple MSCs in the group call area. There is a one-to-many tree relationship between the anchor MSC and the relay MSC.

The visitor location register VLR in the figure stores the user IMSI and the ID list of the group to which the user belongs. When the user roams, the information is copied from the user's HLR to the corresponding VLR.

Group Call Register The GCR contains the group ID and group call area. The group call area is combined with the group ID. It is called the group call reference. The GCR connected to the anchor MSC includes a list of schedulers associated with the group call reference, a list of relay MSCs, and a list of cells directly controlled by the anchor MSC. The GCR connected to the relay MSC includes the anchor MSC address associated with the group call reference and the cell list controlled by the relay MSC.

Upon receiving the corresponding group call initiation request, the anchor MSC queries the connected GCR for the set of attributes. A dispatcher list, a relay MSC list, and a cell list under the control of the MSC are obtained. In turn, the dispatcher, the relay MSC, and the cell under the control of the MSC establish a group call channel, and also notify the user in the group that the group call is initiated by the NCH (notification channel) of each cell, and indicate The group calls the channel for the user in the group to listen.

After receiving the group call request from the anchor MSC, the relay MSC also queries the connected GCR for the cell list, establishes a group call channel in the cells, and informs the user in the group that the group call is initiated by the NCH, and indicates the group call channel. So that users in the group can listen.

When a group call is initiated, a group of users in a particular area can join the group call at the same time and listen to the speaker. There can only be one speaker at a time. When the speaker finishes speaking, other users can become speakers by pressing the PTT button (Push to talk). During the call, any user can decide to leave midway or join the group call in the middle. The user entering the group call area can receive the notification and join the main call halfway.

The speaker can occupy the uplink group call channel and monitor the downlink group call channel at the same time; the network can also allocate a separate uplink and downlink dedicated channel for the speaker. However, the listener in the group call can only monitor the downlink group call channel.

In the mobile communication network, the short message is the text information transmitted by the No. 7 signaling network. The size of the information content is limited to about 70 words (140 bytes). Short messages are mainly based on the end-to-end transmission and reception of mobile phones, and the transmission and reception between mobile phones and the Internet.

Mobile networks typically include both a voice channel and a control channel. Short messages, like voice transmission and fax, are the main telecom value-added services provided by GSM digital cellular mobile communication networks, but short messages do not occupy voice channels, which not only ensures fast transmission, but also greatly reduces communication costs.

The short message is transmitted through the wireless control channel, and the short message service center performs the storage and forwarding functions. The amount of information of each short message is usually limited to 140 bytes. The information sent from the sender (plain text) is stored in the SMSC (Short Message Center) and then forwarded to the destination user terminal. This means that even when the recipient terminal cannot receive the information immediately due to shutdown or other reasons, the system can still save the information and resend it later when appropriate.

Currently, when the network sends a short message to a certain user, the corresponding processing is as follows:

1. The service center sends a short message to the mobile network. Since the user is in the group call, the VLR knows that the user is not in the connected mode.

2. The MSC will page the user. Since the user currently in the group call cannot receive the short message, the user ignores the page request.

3. The network repeats multiple pagings. After the response is not received, the user is not currently in the mobile network. The reason value is "Absent Subscriber", and the SMS is stored by the SC. Wait for the user to re-enter the network;

4. After the group call is over, if the user initiates a location update or a point-to-point call setup, the network will notify the SC of "re-entry into the network", and the SC sends the SMS to the network, and the MSC sends the message to the user;

It can be seen from this that when SMS is sent to a user in a group call, there may be a large delay in receiving the SMS by the corresponding user. This is because the user in the group call cannot receive the SMS, so this period of time must be the reception delay time before the user exits the group call. In addition, even if the user does not actively communicate with the network after the user exits the group call, for example, location update or new point-to-point call, the user still cannot receive the short message until the network communication occurs. The event, this time is still the reception delay time.

In a mobile communication network, usually each SMS on the SC has a valid time. After the valid time is exceeded, the SC discards the corresponding SMS. Therefore, there is a high risk that the SMS sent to the group call user is discarded, resulting in a decrease in the reliability of the communication.

Moreover, in the implementation process of the foregoing technical solution, the MSC needs to repeatedly useless paging for a large number of times, which consumes a large amount of radio resources of the communication system.

SUMMARY OF THE INVENTION In view of the above problems in the prior art, an object of the present invention is to provide a method and apparatus for receiving a short message by a user in a group call, so that the user in the process of handling the group call can still receive the short message in real time. The message has improved the reliability of the communication service.

The object of the invention is achieved by the following technical solutions:

A method for a user in a group call to receive a short message, including:

A. The network side determines that a short message needs to be sent to the user in the group call.

B, the network side determines whether the user receiving the short message has a connection with the network side, if yes, step C is performed, otherwise, step D is performed;

C. The network side sends the short message to the user in the group call by using the connection, and the user receives the short message;

D. The network side initiates paging to the user, and after determining the connection between the user and the network side, sends the short message to the user.

among them: The user identification information sent by the speaker user in the group call to the network side determines whether the short message user has a connection with the network side.

The method further includes:

E. When the network side sends a short message to the listener and does not get a response, the user unreachable flag is recorded in the visit location register VLR and the home location register HLR;

When the listener obtains the uplink group call channel, the network side sends its user ID to the VLR. The VLR saves the user identity information and deletes the user unreachable flag, and notifies the HLR to delete the user unreachable flag, and performs step C.

The method further includes: in the register VLR, and when the speaker in the group call is exiting the group call or switching to the listener, the MSC deletes the saved user identifier of the corresponding speaker.

The network side connection includes a dedicated connection.

The network side sends the short message to the user through the dedicated connection slow auxiliary control information SACCH, and the user issues a command to start the short message receiving unit to receive the short message.

The method further includes:

D1. The speaker having no dedicated connection in the group call receives the paging message, and returns a paging response message to the network side through the group call uplink channel;

D2. The network side sends the short message to the user by using the group call downlink channel.

among them:

The user returns a paging response message to the network side through the uplink fast associated control channel FACCH or the slow associated control channel SACCH of the group call channel.

The method further includes:

After receiving the paging message, the user exits the group call and returns a paging response message to the network side through the random access procedure.

The network side establishes a dedicated independent control channel SDCCH for the user, and sends the short message to the user through the SDCCH channel.

The method further includes:

The user returns a short acknowledgement acknowledgement message to the network side through the uplink SDCCH channel; after receiving the acknowledgement message, the network side deletes the SDCCH channel and returns to the group again. Calling in the call.

In the present invention, when the user includes at least two transmitting and receiving units, in the step D3, the user does not need to exit the group call, but uses other sending and receiving units other than the sending and receiving units occupied by the group call. The receiving unit returns a paging response message to the network side through a random access procedure.

The method further includes:

D6. The user records the paging message.

D7. When the user group call ends, trigger a location update or a connection establishment process to establish a connection between the user and the network side.

The device for receiving a short message by a user in a group call, comprising: a determining unit, configured to determine whether a user who receives the short message has a connection with a network side, and if yes, sends the message to the first short message sending unit There is a notification of the connection, otherwise, a notification that there is no connection is sent to the second short message sending unit;

a first short message sending unit, configured to send the short message to a user in the group call according to the notification that the connection exists and through the connection;

The second short message sending unit is configured to initiate paging to the user according to the notification that the connection does not exist, and send the short message to the user after determining the connection between the user and the network side.

The judging unit judges whether the short message user has a connection with the network side according to the user identification information sent by the speaker user in the group call to the network side.

The device also includes:

The information receiving unit is configured to receive feedback information of the user, and notify the visit location register VLR and the home location register HLR to record the user unreachable flag when the short message is sent to the listener and the response is not received;

When the listener's response is received, the user ID is sent to the VLR, and the VLR saves the user identification information and deletes the user unreachable flag, and notifies the HLR to delete the user unreachable flag.

It can be seen that the foregoing technical solution provided by the present invention provides a method for implementing a short message received by a user in a different mode in a group call. Therefore, the present invention can ensure that a group call user can receive a short message in time to avoid The short message is discarded due to timeout, thereby effectively improving the reliability of service communication in the wireless communication system.

In addition, in the present invention, the MSC does not need to perform meaningless paging multiple times. Therefore, the implementation of the present invention can effectively save radio resources in the wireless communication system, thereby further improving network communication performance. DRAWINGS

Figure 1 is a schematic structural diagram of a core network of a cluster system;

2 is a flow chart of a processing procedure of the method of the present invention;

3 is a schematic diagram of a core processing flow of the method according to the present invention;

4 is a block diagram of an embodiment of the apparatus of the present invention.

The specific implementation of the method in this embodiment can process the receiving of the short message of the user in the group call according to the processing procedure shown in FIG. 3, which specifically includes:

Step 31: The network side determines that the short message needs to be sent to the user in the group call. Step 32: The network side determines whether the user who receives the short message has a connection with the network side. If yes, go to step 33. Otherwise, execute. Step 34;

Step 33: The network side sends the short message to the user in the group call by using the connection, and the user receives the short message.

The connection with the network side described in this step may be a dedicated connection of a speaker with a dedicated connection in a group call, or a group call channel obtained by a speaker without a dedicated connection;

Step 34: The network side initiates paging to the user, and after determining the connection between the user and the network side, sends the short message to the user, and the user receives the short message;

The connection with the network side described in this step may be a group call channel obtained by a speaker without a dedicated connection, or may be a connection established according to the initiated paging.

More specifically, in the existing mobile communication network, the users in the group call call include three different modes, specifically: a speaker and a mode with a dedicated connection, the speaker does not have a dedicated connection mode and listens Mode, where the first mode user has a dedicated connection with the network side, and the latter two users do not have a dedicated connection with the network side.

This embodiment provides a processing method for receiving short messages in each mode user in a group call, so that each user in the group call can still receive the short message in time. .

As shown in Figure 2, in the specific implementation process, different processing procedures are adopted for three different mode users. The specific processing process includes the following processing steps:

Step 21: First, according to the user identifier, send a short message of the user in the group call to the corresponding network side MSC; Step 22: The MSC determines whether the user who receives the short message has a dedicated connection, and if yes, performs step 23; otherwise, step 25 or step 29 is required to page the user;

In this step, the users who receive the short message in different modes will enter different processing procedures to receive the short message: For the speaker with the dedicated connection, step 23 and step 24 will be performed to receive the short message. For the speaker without a dedicated connection, step 25 to step 28 will be performed to receive the short message; and for the listener, step 29 to step 215 will be performed for receiving the short message;

Since the MSC may not be able to know whether each user is a group call user on the network side, and it is not clear what mode the user is in, in this step, the MSC can determine whether the user receiving the short message has a dedicated connection, and if so, execute Steps 23 and 24, otherwise, the paging is initiated to the user, and then the group call users in different modes will enter different processing flows.

For a speaker with a dedicated connection, when receiving a short message, the processing described in steps 23 and 24 below is required.

Step 23: For a speaker with a dedicated connection, since there is an independent dedicated connection, neither the uplink group call channel nor the downlink group call channel is occupied; therefore, the process of receiving the short message by the speaker with the dedicated connection The process of receiving a short message from the ordinary point-to-point connection user is the same; that is, the network side MSC sends a short message to the user with the dedicated connection according to the SACCH (Slow Auxiliary Control Channel) channel of the current dedicated connection;

Step 24: The user-initiated short message receiving unit with the dedicated connection receives the short message, and replies to the receiving confirmation message on the uplink SACCH channel;

The short message receiving unit is a processing module for receiving a short message, which is set in the user equipment. Since it is a well-known technology, it will not be described in detail here.

In this embodiment, the user with the dedicated connection in the group call no longer ignores the short message sent by the MSC, but changes its behavior so that the user can receive the short message in this state.

For a speaker who does not have a dedicated connection, when receiving a short message, the processing described in steps 25 to 28 below is required. The speaker without the dedicated connection obtains the group call uplink channel, and can simultaneously listen to the group call downlink channel.

Step 25: In the MSC, if there is no dedicated connection between the user and the network, the MSC is considered not to be in the connected mode. When a short message needs to be sent to the user not in the connected mode, the paging needs to be initiated first, so as to facilitate establishment. Corresponding connection Step 26: After receiving the paging message sent by the MSC, the speaker without the dedicated connection returns the paging response message to the network side by using the uplink FACCH (fast associated control channel) of the group call channel, or the ACCH channel;

Step 27: The network transmits the SMS to the user through the downlink SACCH channel of the group call channel. Step 28: After the user successfully receives the short message, the uplink through the group call channel

The SACCH returns a confirmation message to the network.

For the listener in the group call, when receiving the short message, the processing described in steps 29 to 214 below is required. The listener does not obtain the group call uplink channel, but only listens to the downlink channel.

Step 29: Since the listener and the MSC are not in the connected mode, the MSC needs to send a page to the listener;

Step 210: After receiving the paging message sent by the MSC, the listener quits the current group call. Step 211: Perform a paging response to the network through a random access procedure, and establish a SDCCH (dedicated independent control channel) for the network.

Step 212: The network transmits the short message to the user (ie, the listener) through the downlink SDCCH channel;

Step 213: After successfully receiving the short message, the user returns an acknowledgement message to the MSC through the uplink SDCCH.

Step 214: After receiving the short message receiving acknowledgement message returned by the user, the network side deletes the SDCCH channel of the user.

Step 215: The user reads the group call channel configuration on the NCH channel, and re-enters the group receiving mode, that is, the listener who is again the group call. In this embodiment, if the user who is the listener has multiple sending and receiving units, after receiving the paging message sent by the MSC, the user may not leave the group call, but is sent and received by the group call. The other transmitting and receiving units other than the unit additionally establish a dedicated connection for receiving the short message sent by the network side MSC, and after successfully receiving the short message, deleting the dedicated connection established to receive the short message. In this embodiment, after receiving the paging message sent by the MSC, the listener may not leave the group call, but record the paging message; and immediately initiate a location update after the group call ends. Or a process such as connection establishment to trigger the process of receiving a short message, which can reduce the delay caused by waiting for the periodic location update. In addition, in the group call, since the speaker obtains the uplink group call channel, it will go to the network side.

The MSC sends a Talker Indication message containing the speaker's user ID. Therefore, in this embodiment, the MSC may send the speaker's user identification to the VLR (visit location register), and the VLR records it as being in a connected state.

When the SC sends a short message to the speaker, in the above step 22, the network side MSC can directly identify the speaker without a dedicated connection in the group call, and send a short message to the user through the group call channel. After the short message, the speaker can also send a confirmation message directly through the group call channel.

Specifically, when the MSC determines that the group call user that receives the short message has a connection with the network side, the short message is directly sent to the speaker by using the group call downlink channel, and the speaker receives the short message. And sending a reception confirmation message to the network side by using the group call uplink channel. In this way, the process of initiating paging by the MSC to the speaker without a dedicated connection in the group call of the connected state can be omitted.

When the speaker with no dedicated connection releases the uplink group call channel and becomes the listener, the MSC also needs to notify the VLR that the VLR will delete the speaker's user identification record.

If the SC sends a short message to a listener and the listener does not respond, the short message will be saved in the SC. When the SC sends a short message to the listener without receiving a response, the VLR and the HLR will record the user unreachable flag MNRF (Mobile-Station-Not-Reachable-Flag), and the HLR is the Absent Subscriber.

When the listener obtains the uplink group call channel, that is, when the listener changes to the speaker, the Talker Indication message will be sent. At this time, the MSC still sends the speaker's user ID to the VLR, and the VLR saves the user identification information and triggers recovery. process. The VLR deletes the user unreachable flag MNRF and notifies the HLR (Home Location Register). The HLR deletes the User Unreachable Flag MNRF and the unreachable reason MNRR, and then notifies the SC that the user can receive the short message. The SC sends the short message to the MSC, and the MSC and the user use the group call uplink and downlink channels to complete the sending and confirming process of the short message.

Referring to FIG. 4, the apparatus for receiving a short message by a user in a group call according to the present invention includes: an information sending unit u2, and an information receiving unit ul. The information sending unit u2 further includes a determining unit u21, a first short message sending unit u22, and a second short message sending unit u23, wherein: the determining unit u21 is configured to determine whether the user receiving the short message exists on the network side The connection, if yes, sends a notification that the connection exists to the first short message sending unit u22, otherwise, sends a notification that the connection does not exist to the second short message sending unit u23;

The first short message sending unit u21 is configured to send the short message to the user in the group call according to the notification that the connection exists and through the connection;

The second short message sending unit u22 is configured to initiate a paging to the user according to the notification that the connection does not exist, and send the short message to the user after determining the connection between the user and the network side;

The information receiving unit ul is configured to receive feedback information of the user, and notify the visitor location register VLR and the home location register HLR to record the user unreachable flag when the short message is sent to the listener and the response is not received;

The judging unit u21 judges whether the user who receives the short message has a connection with the network side according to the user identification information sent by the speaker user in the group call to the network side.

In practice, the device described in FIG. 4 can be built into the network side device.

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope disclosed by the present invention. Alternatives are intended to be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

Rights request

A method for receiving a short message by a user in a group call, which is characterized by:

2. The method for receiving a short message by a user in a group call according to claim 1, wherein:

The network side ^{^:} Gen data in the user identification information group of speakers whistling called user transmitted by the network side determines whether to receive the short message the user is connected to a network side exists.

The method for receiving a short message by a user in a group call according to claim 2, further comprising:

E. When the network side sends a short message to the listener and does not receive a response, the user unreachable flag is recorded in the visit location register VLR and the home location register HLR;

When the listener obtains the uplink group call channel, the network side sends its user ID to the VLR. The VLR saves the user identification information and deletes the user unreachable flag, and notifies the HLR to delete the user unreachable flag, and performs step C.

The user identification of the speaker is saved in the visitor location register VLR by the network-side mobile switching center MSC, and when the speaker in the group call is disconnected from the group call or transferred to the listener, the MSC deletes the saved corresponding speaker. User ID.

5. The method according to claim 1, wherein the network side connection comprises a dedicated connection.

6. The method for receiving a short message by a user in a group call according to claim 5, wherein:

The network side sends the short message to the user through the dedicated connection slow assist control information SACCH.

The method for receiving a short message by a user in a group call according to claim 5 or 6, further comprising:

8. The method for receiving a short message by a user in a group call according to claim 7, wherein:

The method for receiving a short message by a user in a group call according to claim 1, 2, 3, 4, 5 or 6, wherein the method further comprises:

10. A method of receiving a short message by a user in a group call according to claim 9, wherein:

The method for receiving a short message by a user in a group call according to claim 9, further comprising:

The user returns a short message reception confirmation message to the network side through the uplink SDCCH channel. After receiving the acknowledgement message, the network side deletes the SDCCH channel and returns to the group call.

12. The method for receiving a short message by a user in a group call according to claim 1, 2, 3, 4, 5 or 6, further characterized in that: the transmitting and receiving unit occupied by the user by using the group call The other transmitting and receiving units return a paging response message to the network side through the random access procedure.

13. A method for receiving a short message by a user in a group call according to claim 1, 2, 3, 4, 5 or 6, wherein:

D6. The user records the paging message;

14. A device for receiving a short message by a user in a group call, characterized in that:

a determining unit, configured to determine whether the user that receives the short message has a connection with the network side, and if yes, send a notification that the connection exists to the first short message sending unit, otherwise, send a notification that the second short message sending unit does not exist ;

The second short message sending unit is configured to initiate a paging to the user according to the notification that the connection does not exist, and send the short message to the user after determining the connection between the user and the network side.

15. The apparatus for receiving a short message by a user in a group call according to claim 14, wherein:

The device for receiving a short message by a user in a group call according to claim 15, further comprising: