CN1984389A - Method for discussing group-call channel mode - Google Patents

Abstract

The invention discloses a method for negotiating a group call channel type. Report the group call channel type information to the network side; the network side determines the group call channel type supported by the mobile station as the group call channel type in the corresponding area according to the received group call channel type information. In the present invention, through the above scheme, the ability of the mobile station is integrated to determine the voice group call/multicast service channel, which solves the problem that the mobile station cannot join the voice group call/multicast, or joins the voice group call/multicast but cannot hear and, because in the present invention, the network side selects the optimal group call channel type according to the received group call channel type information, thereby the network side selects a better group call channel type under the premise that all mobile stations can hear the voice. The best group call channel type improves the service quality.

Description

Method for Group Call Channel Type Negotiation

technical field

The invention relates to the technical field of voice group call/multicast service, in particular to a method for group call channel type negotiation.

Background technique

The voice group call/multicast service is a voice group call service (Voice Group Call Service, VGCS) or a voice multicast service (Voice Broadcasting Service, VBS).

Among them, VGCS is a service that enables multiple people to speak and multiple people to be listeners. There are two types of members participating in VGCS, dispatchers and service users. A VGCS service call only allows one service user and at most 5 dispatchers to speak at the same time. Business users who are in the answering state can obtain the right to speak and participate in the speech through the push-to-talk (Push To Talk, PTT) uplink operation. The dispatcher has a dedicated channel and can participate in the speech at any time without rushing to perform uplink operations.

The group call area of the voice group call service consists of one or more cells belonging to the same Mobile Switching Center (MSC) or different MSCs. When calling, each relevant cell has a group call channel, in which the uplink is only used by the current talker in the group transmission mode, and all the listeners in the group reception mode are waiting on the downlink, and the notification message about the group call is in Broadcast on the Notification Channel (NCH).

The implementation of VBS is similar to that of VGCS, the difference is that only the call initiator can speak during the VBS call, and other members are always in the receiving state, and the speaking user does not need to press the PTT key.

In the prior art, in the voice group call/multicast service, the network side determines the group call channel type of the voice group call/multicast service by itself, and notifies all the voice group call/multicast service users to join the corresponding group call channel. The network side can use two methods of immediately allocating group call channels and delaying allocating group call channels to allocate group call channels to realize the access of voice fine call/multicast service users.

In the method of immediately assigning a group call channel, when the group call is established, the network side first determines the type of the group call channel, and then establishes the group call channel in each cell in the group call area according to the determined group call channel type, and in each cell Send a notification message containing the group call channel description and group identification number on the NCH channel of the group call to notify all voice group call/multicast service users of the group call to join, wherein the group call channel description includes the group call channel type. According to the group identification number, the mobile stations that determine all service users belonging to the group call themselves join the common group call channel according to the group call channel information in the notification message, so as to realize the joining of the group call.

Taking each cell in the group call area as an example to determine the group call channel type, the network side specifically determines the group call channel type and allocates the group call channel process: the group call register (GCR) saves the group call allowed to use A set of call channel types, including preferred information, which is configured by the network administrator. When establishing a group call, the MSC obtains the above-mentioned set information and preferred information from the GCR, and sends the group call pointer to the base station controller (BSC). The configuration message carries the above-mentioned set and preference information, and the BSC determines the specific group call channel type to be used in combination with the type of the current idle channel in the cell in the group call area and the set and preference information of the allowed group call channel types in the group call assignment message. And activate a channel of this type through the base station (BTS), and the BTS sends a notification message on the NCH.

If the entire group call area of a voice group call/multicast service adopts the same group call channel type, the MSC directly determines a group call channel type according to the above-mentioned collection and preference information and sends it to the BSC; or the MSC Combining the above set, preference information and the current idle channel type of the cell in the group call area to determine the specific channel type to use, and activate the channel of the corresponding cell through the corresponding BTS.

In the delayed allocation group call channel method, when the group call is established, the network side sends a notification message that does not contain the description of the group call channel on the NCH channel of each cell in the group call area, as shown in Figure 1. In this case, the voice The process for a group call/multicast service user to join a voice group call/multicast includes:

Step 101, in the voice group call/multicast service, the network side sends a notification message not including group call channel description information on the NCH channel of each cell in the group call area to notify users to join the voice group call/multicast.

The notification messages mentioned in this specification all include the group identification number of the group call or multicast, and only the mobile stations belonging to the service users of the group call or multicast will receive the notification message according to the group identification number.

Step 102, after receiving the notification message, the mobile station applies for a signaling channel through a channel request.

Step 103, the network side allocates a signaling channel to the mobile station according to the user's channel request, and notifies the mobile station of the allocated signaling channel through an immediate assignment command.

Step 104, the mobile station sends a notification response message to the network side through the signaling channel allocated to it by the network side, requesting the network side to allocate a group call channel for it.

Here, the format of the notification response message is shown in Table 1, and the format is extracted from the 3GPP TS44.018V7.3.1 protocol, which can be referred to for details.

Information element identification (IEI) Information element Type/Reference (Type/Reference) Required/Optional (Presence) format Length Radio Resource Management Protocol Discriminator (RRmanagement Protocol discriminator) Protocol Discriminator 10.2 Required (M) V 1/2 Skip the indication (SkipIndicator) Ignore the indication (SkipIndicator) 10.3.1 M V 1/2 Notification response message type (Notificationresponse Messagetype) Message type (Messagetype) 10.4 M V 1 Mobile Station Classmark Mobile station classmark (Mobilestation classmark2) 10.5.1.6 M LV 4 Mobile identity (Mobileidentity) Mobile identity (Mobileidentity) 10.5.1.4 M LV 2-9 Group call or broadcast call reference (Group or broadcastCall reference) Descriptive group or broadcast call reference (Descriptivegroup or broadcast call reference) 10.5.1.9 M V 5

Table 1

Step 105: After receiving the notification response message, the network side allocates a group call channel for the mobile station by itself. Here, the specific method of allocating the group call channel type by the network side is the same as the method for immediately allocating the group call channel, and will not be described in detail.

Step 106, the network side assigns the above-mentioned mobile station to the group call channel, and updates the notification message on the NCH so that it contains the above-mentioned assigned group call channel information, and the mobile stations of other service users base on the updated group call channel information in the notification message. Add call channel information to voice group call/multicast.

It can be seen from the above description that the group call channel in the voice group call/multicast service is completely assigned by the network side, and there is no capability of the mobile station of the integrated voice group call/multicast service user.

In the voice group call/multicast service, in order to achieve the best service quality, the network side usually uses a group call channel with the best possible channel coding for the voice group call/multicast service, and the support of the mobile station Capabilities may vary. Because the network side does not obtain information about the support capability of the mobile station's group call channel type, it may happen that the network side selects a group call channel type that is not supported by some mobile stations when selecting the group call channel type. When the mobile station of the voice group call/multicast service user does not support the group call channel assigned by the network side, the voice group call/multicast service user cannot join the voice group call/multicast, or although he can join Voice group call/multicast, but the voice cannot be decoded and the voice cannot be heard.

However, if the network side allocates channels, it is necessary to realize that all mobile stations of voice group call/multicast service users support group call channels. Since the mobile stations are forward compatible with the types of group call channels, a channel will be selected. Common group call channel type with poor coding, which will reduce the quality of service.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a method for negotiating the group call channel type, which can integrate the capabilities of the mobile station of the voice group call/multicast service user to perform group call channel negotiation in the voice group call/multicast service. Type determination.

In order to achieve the above object, the present invention provides a method for group call channel type negotiation, the method comprising:

The mobile station of the voice group call/multicast service user receives a message from the network side notifying the mobile station to join the voice group call/multicast, and reports the group call channel type information supported by itself to the network side;

The network side determines the group call channel type supported by the mobile station as the group call channel type of the corresponding area according to the received group call channel type information.

The message notifying the mobile station to join the voice group call/multicast may not include the group call channel type.

The method may further include: the network side allocates a group call channel to a corresponding area according to the determined group call channel type.

The message notifying the mobile station to join the voice group call/multicast may also include the group call channel type.

Then after the mobile station of the voice group call/multicast service user receives the message notifying it to join the voice group call/multicast, it may be after the mobile station determines that it does not support the group call channel included in the message Only when the type is specified, the step of reporting the type information of the group call channel supported by itself to the network side is executed.

The method may further include: the network side changes the group call channel of the corresponding area according to the determined group call channel type.

Preferably, the network side receives the group call channel type information reported by the mobile station within a preset time T, and determines the group call channel type according to all received group call channel type information after the time elapses.

The network side may start to calculate the time T from receiving the group call channel type returned by the mobile station of the first voice group call/multicast service user;

Or, the network side calculates the time T from sending a message notifying the mobile station to join the voice group call/multicast.

The corresponding area may be the cell where the mobile station is located.

The corresponding area may also be the entire group call area of the group call/multicast service.

Preferably, the mobile station reports the type information of the group call channel it supports to the network side through a notification response message.

Preferably, the network side determines the group call channel type according to the received group call channel type information as follows: the network side selects the optimal group call channel type according to the received group call channel type information.

As can be seen from the above scheme, in the present invention, after the mobile station of the voice group call/multicast service user receives the message notifying the mobile station to join the voice group call/multicast, the group call channel type information supported by itself is reported to the Network side; the network side determines the group call channel type supported by the mobile station as the group call channel type of the corresponding area according to the received group call channel type information, and realizes comprehensive Voice group call/multicast service user mobile station's ability to determine the voice group call/multicast service channel, solving the problem that the mobile station cannot join the voice group call/multicast, or join the voice group call/multicast but cannot hear the voice The problem;

Moreover, since the network side selects the optimal group call channel type according to the received group call channel type information, the network side selects a better group call channel type under the premise that all mobile stations can hear the voice, which improves the business quality.

Description of drawings

Fig. 1 is the flow chart of delay allocation group call channel in the prior art;

Fig. 2 is the flowchart of the first embodiment of the present invention;

Fig. 3 is a flowchart of the fourth embodiment of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

The main idea of the present invention is that after the mobile station of the voice group call/multicast service user receives the message notifying the mobile station to join the voice group call/multicast, it reports the group call channel type information supported by itself to the network side; The side determines the group call channel type supported by the mobile station as the group call channel type of the corresponding area according to the received group call channel type information.

The network side may determine the type of group call channel after receiving the type information of the group call channel supported by the mobile station returned by the mobile station, and newly allocate or change the group call channel of the cell where the mobile station is located according to the channel type. If the same group call channel type is used in the entire group call area, the group call channels of all other cells in the entire group call area can also be changed at the same time.

In the present invention, the specific method for determining the group call channel type may be to select the optimal group call channel type from the group call channel type information reported by the mobile station. Here, the optimal group call channel type can be selected based on network capacity and voice quality based on network requirements. For example, if the network requires large capacity, then select the group call channel type that can maximize the network capacity among the group call channel types reported by the mobile station, such as the half-rate voice version for the existing group call channel type, and the capacity For the same group call channel type, select the group call channel type with the best voice quality among them. For example, for the group call channel type of the existing full-rate voice version, the full-rate voice version 2 is preferred; and if the network requires voice If the quality is the best, then select the group call channel type that can provide the best voice quality among the group call channel types reported by the mobile station. Rate voice version 1.

The mobile station of the voice group call/multicast service user can report the type information of the group call channel supported by itself to the network side through the notification response message.

The notification message received by the voice group call/multicast service user's mobile station to notify him or her of joining the voice group call/multicast may be a notification message including a group call channel type, or a notification message not including a group call channel type. In the case that the notification message includes the group call channel type, the mobile station may return a notification response message to the network side to report the group call channel type supported by itself when it determines that it does not support the group call channel type in the notification message; Then the network side can determine the channel type of the group call according to the notification response after receiving the notification response message from the mobile station; The notification response message of the channel type starts, and after a preset waiting time, the group call channel type is determined by synthesizing all the group call channel type information in the notification response messages received from the mobile station. In the case that the notification message does not include the group call channel type, the mobile station receiving the notification message can report the group call channel type supported by itself through the notification response message, and the network side can start sending the notification message, or receive the first A mobile station returns a notification response message including the group call channel type, and after a preset waiting time, the group call channel type is determined by synthesizing all the group call channel types in the notification response messages received from the mobile station.

In addition, in the present invention, the method of interactively determining the group call channel type and allocating the group call channel among various devices inside the network side may be the same as that of the prior art, which will not be repeated here.

The present invention is described in detail below through specific examples.

In the first embodiment of the present invention, the network side carries the group call channel description information in the notification message issued for the first time by the voice group call/multicast service, and the network does not support multiple mobile stations in one cell. When the group call channel type is actively allocated by the network side, each time the network side receives a notification response message, it will process it according to the message.

The process flow of the first embodiment of the present invention is shown in Figure 2, including the following steps:

Step 201, the network side establishes a group call channel in each cell in the group call area according to the determined group call channel type, and sends a notification message containing a description of the group call channel on the NCH channel of each cell. The above group call channel description Include the type of the group call channel in order to notify the service user of the group call that the mobile station joins the above established group call channel.

Step 202, the mobile station receiving the notification message determines whether it supports the group call channel type in the message, if yes, executes step 203, joins the group call channel, and then ends the process; otherwise, executes step 204.

Step 204, the mobile station reports the type information of the group call channel it supports to the network side through a notification response message.

In this step, the mobile station applies for a signaling channel from the network side, and reports the notification response message to the network side through the signaling channel allocated to it by the network side. In addition, the notification response message here can be extended on the basis of the existing notification response message, adding information about the supported group call channel type. Taking the extension on the notification response message shown in Table 1 as an example, the extended message format can be shown in Table 2:

IEI cell type/reference required/optional Format length RRM protocol identification protocol identifier m V 1/2 ignore instructions ignore instructions m V 1/2 Notification Response Message Type message type m V 1 mobile class label mobile class label m LV 4 MSID MSID m LV 2-9 Group Call or Broadcast Call Reference Describe group call or broadcast call reference m V 5 Supported group call channel type (Permitted channeltype) Supported group call channel type (Permitted channeltype) Optional (O) TV 2

Table 2

Among them, the supported group call channel types can be coded as shown in Table 3:

table 3

The group call channel type identification supported in Table 3 adopts the following encoding method:

Bit 1: 0 means that version 1 of full-rate speech coding is not supported; 1 means that version 1 of full-rate speech coding is supported.

Bit 2: 0 means that version 1 of half-rate speech coding is not supported; 1 means that version 1 of half-rate speech coding is supported.

Bit 3: 0 indicates that full-rate speech coding version 2 is not supported; 1 indicates that full-rate speech coding version 2 is supported.

Other bits are reserved. If there are other speech coding types, the reserved bits can be used to indicate whether they are supported.

Step 205: After receiving the notification response message sent by the mobile station, the network side re-determines the group call channel type of the cell where the mobile station is located according to the group call channel type information supported by the mobile station in the notification response message, and reassigns the group call channel type for the cell. The group call channel corresponding to the channel type, and in step 206 and step 207, the group call channel information of reallocation will be notified to the above-mentioned sending notification by reconfiguration message (VBS/VGCS reconfiguration) and reconfiguration 2 (VBS/VGCS reconfiguration2) message The mobile station that responded to the message. Then in step 208, the notification message is updated so that the notification message includes the group call channel information re-determined by the network side.

For the specific content of the above reconfiguration message and reconfiguration 2 message, please refer to the relevant description in 3GPP TS44.018V7.3.13.4.15.2a.

In this embodiment, the network side can also re-determine the same group call channel type for all cells in the entire group call area according to the group call channel type in the notification response message, and reassign the group call channel type corresponding to the group call channel type for all cells. Group call channel. Then in step 208, what is updated is the notification message on the NCH channels of all cells in the group call area.

In step 209, the mobile station that has received the reconfiguration and reconfiguration 2 messages joins the above-mentioned reallocated group call channel, and other mobile stations that have received the notification message join the above-mentioned reallocated group call channel according to the received notification message.

In this embodiment, if there are multiple mobile stations in a cell that do not support the group call channel type determined by the network side in step 201 above, each mobile station reports the group call channel type supported by itself through a notification response message, and the network side After each notification response reported by the mobile station is received, the procedures after the above step 205 are executed.

The above is the description of the first embodiment of the present invention.

In the second embodiment of the present invention, different from the first embodiment, when there are multiple mobile stations in a cell that do not support the group call channel type actively allocated by the network side, the network side does not receive a notification response every time The message is processed once according to the message, but starts when the network side sends a notification message, or receives a notification response message including the group call channel type returned by the first mobile station, and processes after a preset waiting time T. In this embodiment, the network side starts to calculate the waiting time T after receiving the notification response message including the channel type of the group call returned by the first mobile station as an example for illustration. The T value can be determined by the operator according to the network conditions, and its value can be specifically: 0<T≤2 seconds.

In this embodiment, when the network side receives the notification response message reported by the mobile station in step 205, it does not process it immediately, but continues to receive the notification response message reported by the mobile station within the following T time, and according to the notification response message reported by the mobile station within the T time Re-determine the group call channel type carried in all notification response messages received, so that the re-determined group call channel type meets the capabilities of all mobile stations that have reported the notification response message within the above T time, reducing The interaction process between the mobile station and the network side.

In the third embodiment of the present invention, the notification message sent by the network side for the voice group call/multicast service for the first time does not carry the group call channel description information. There is the same flow of technology, in step 106, for the mobile station assigned to the group call channel and other mobile stations receiving the notification message including the group call channel information, all follow the above-mentioned first embodiment or second embodiment Execute step 202 and subsequent processes.

In the fourth embodiment of the present invention, the notification message sent by the network side for the voice group call/multicast service for the first time does not carry the group call channel description information, and the mobile station actively reports the information after receiving the notification message. The type of group call channel supported by itself.

In this embodiment, the waiting time T is preset, and the network side receives the notification response message including the group call channel type returned by the first mobile station and starts to calculate the waiting time T as an example. The specific process is shown in FIG. 3 , including the following steps:

Step 301, the network side sends a notification message not including the description of the group call channel on the NCH channel of each cell in the group call area, and notifies the mobile station of the voice group call/multicast service user to establish a group call.

Step 302: The mobile station that receives the notification message reports the type information of the group call channel it supports to the network side through the notification response message through the signaling channel allocated to it by the network side.

Step 303, the network side receives the notification response message sent by the mobile station, and after the waiting time T, re-determines the group call channel type of each cell according to the group call channel type information in the notification response message reported by all mobile stations, respectively For each cell according to the distribution of the corresponding group call channel.

In this embodiment, the network side can also determine the same group call channel type for all cells in the entire group call area according to the group call channel type information in the notification response message, and reassign the corresponding group call channel type for all cells. Group call channel.

Step 304, the network side assigns the mobile station reporting the notification response message to the group call channel allocated for the cell where the mobile station is located, and updates the notification message on the corresponding NCH to include the allocated group call channel information, and other The mobile station of the service user joins the voice group call/multicast according to the group call channel information in the updated notification message.

Of course, in this embodiment, other mobile stations that have received the group call channel information can still report the group call channel type information according to the procedure in the first embodiment or the second embodiment above.

The above is the description of the specific embodiments of the present invention, and the method of the present invention can be appropriately improved during the specific implementation process to meet the specific needs of specific situations. Therefore, it can be understood that the specific implementation manners according to the present invention are only exemplary, and are not intended to limit the protection scope of the present invention.

Claims (12)

1. A method for group call channel type negotiation, characterized in that the method comprises: The mobile station of the voice group call/multicast service user receives a message from the network side notifying the mobile station to join the voice group call/multicast, and reports the group call channel type information supported by itself to the network side; The network side determines the group call channel type supported by the mobile station as the group call channel type of the corresponding area according to the received group call channel type information. 2. The method according to claim 1, wherein the message notifying the mobile station to join the voice group call/multicast does not include the group call channel type. 3. The method according to claim 2, further comprising: the network side assigning a group call channel to the corresponding area according to the determined group call channel type. 4. The method according to claim 1, wherein the message notifying the mobile station to join the voice group call/multicast includes the group call channel type. 5. The method according to claim 4, characterized in that, after the mobile station of the voice group call/multicast service user receives the message notifying it to join the voice group call/multicast, the mobile station determines the When it does not support the group call channel type included in the message, perform the step of reporting the information of the group call channel type supported by itself to the network side. 6. The method according to claim 4, further comprising: the network side changing the group call channel in the corresponding area according to the determined group call channel type. 7. The method according to any one of claims 1 to 6, characterized in that the network side receives the group call channel type information reported by the mobile station within a preset time T, and after the time elapses, according to All received group call channel type information determines the group call channel type. 8. The method according to claim 7, wherein the network side starts to calculate the time T from the group call channel type returned by the mobile station of the first voice group call/multicast service user ; Or, the network side calculates the time T from sending a message notifying the mobile station to join the voice group call/multicast. 9. The method according to any one of claims 1 to 6, wherein the corresponding area is the cell where the mobile station is located. 10. The method according to any one of claims 1 to 6, wherein the corresponding area is the entire group call area of the group call/multicast service. 11. The method according to any one of claims 1 to 6, wherein the mobile station reports the type information of the group call channel it supports to the network side through a notification response message. 12. The method according to any one of claims 1 to 6, wherein the network side determines the group call channel type according to the received group call channel type information: the network side determines the group call channel type according to the received group call channel type information information to select the optimal group call channel type.