WO2008095419A1

WO2008095419A1 - Method for allocating dedicated channel and base station device thereof

Info

Publication number: WO2008095419A1
Application number: PCT/CN2008/070028
Authority: WO
Inventors: Minjun Shen; Hua Wen; Fei Chen; Shuliang Gao
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-02-06
Filing date: 2008-01-04
Publication date: 2008-08-14
Also published as: CN101242632A; CN101242632B

Abstract

A method for allocating a dedicated channel is disclosed, which includes: if there is no available dedicated channel to allocated in the cell that a MS is located in, then allocating a dedicated channel of the cell neighboring to the cell that the MS is located in. A method for accessing a dedicated channel is disclosed, which includes: receiving an information of accessing a neighboring cell from the network side, accessing the dedicated channel of the neighboring cell. And also a base station device and an apparatus for accessing a dedicated channel are provided. With the present invention, it can allocate a dedicated channel of the neighboring cell to the MS if there is no available dedicated channel in the cell that the MS is located in, so as to avoid the failure of occupying the dedicated channel in group call service due to lack of wireless resource in the cell that the MS is located in, therefore it can enhance the success rate of group call uplink occupation.

Description

Method for allocating a proprietary channel and base station device

Technical field

The present invention relates to the field of global mobile communication technologies, and more particularly to a method of allocating a dedicated channel and a base station apparatus. Background of the invention

The Global System for Mobile Communications (GSM) uses digital communications technology to develop new services for users in different application environments. For example, the GSM System for Service Railway (GSMR) is a communication platform for railway workers to meet the growing needs of railway networks.

In the GSMR service, the group call service is a point-to-multipoint communication mode. All users in the small area share a group call channel, and all group call users listen to the downlink of the group call channel, and the group call speaker occupies the uplink. There are two ways for the group caller to occupy the uplink. One is that the speaker directly occupies the uplink of the group call channel. After the speaker releases the call right, the group call channel is uplinked. The other is distributed by the network side. There is a channel for the speaker, the speaker occupies the uplink of the proprietary channel, and after the speaker releases the call right, the network side releases the proprietary channel uplink.

At present, when the speaker of the group call adopts the second mode to occupy the uplink, that is, when the network side allocates a dedicated channel for the speaker of the group call, the mobile station (MS) is the speaker of the group call, and the base station subsystem of the network side ( The BSS) and the Mobile Switching Subsystem (NSS) assign a proprietary channel to the MS.

In the process of implementing the present invention, the inventor has found that in the existing method for allocating a dedicated channel, at least the following problems exist: If the speaker occupies the group call channel uplink, there is no idle radio resource in the cell as a dedicated channel. The network side cannot assign a dedicated channel to the speaker. That is to say, although the current group call channel is idle, the network side cannot allocate a dedicated channel to the speaker, so that the speaker cannot occupy the right to speak. In this way, the end user will think that the group call service is not Available, especially when the group caller is concentrated in a cell without a dedicated channel, it will cause no one to occupy the uplink of the proprietary channel, and only the group call can be ended. Summary of the invention

In view of this, the embodiments of the present invention provide a method for allocating a dedicated channel for allocating available proprietary channels to a group caller in a cell that has no dedicated channel available in the cell.

The embodiment of the present invention further provides a base station device for allocating available dedicated channels to a group caller in a group call service where no dedicated channel is available in the group call service.

The technical solution of the embodiment of the present invention is implemented as follows:

A method of allocating a proprietary channel, including:

If there is no dedicated channel that can be allocated in the cell where the MS is located, the dedicated channel of the neighboring cell of the cell where the MS is located is allocated to the MS.

A method of accessing a proprietary channel, including:

Receiving a notification from a network side of a proprietary channel accessing a neighboring cell;

Access to a proprietary channel of the neighboring cell.

A base station device includes:

And an allocating module, configured to allocate, by the MS accessing the base station device, a dedicated channel of a neighboring cell adjacent to the cell where the MS is located, and send an allocation command;

An access module, coupled to the allocation module, is configured to send an access command to the MS according to the allocation command.

A device for accessing a proprietary channel, comprising:

a first unit, configured to receive a notification of a dedicated channel from the network side to access the neighboring cell; and a second unit, configured to access a dedicated channel of the neighboring cell.

It can be seen from the foregoing solution that the current embodiment of the present invention is small in the group call service. When there is insufficient radio resources in the area and the dedicated channel cannot be allocated, the dedicated channel of the neighboring cell is allocated to the group caller of the current cell, thereby avoiding the failure of the dedicated channel uplink occupation caused by the insufficient radio resources of the current cell. , effectively improving the success rate of the group call uplink occupation. BRIEF DESCRIPTION OF THE DRAWINGS

1 is a flow chart of a method for a current cell to allocate a dedicated channel for an MS;

2 is a flowchart of a method for allocating a dedicated channel in an embodiment of the present invention;

3 is a flowchart of a method for allocating a dedicated channel in a BSS according to an embodiment of the present invention; FIG. 4 is a flowchart of a method for allocating a dedicated channel between BSSs according to an embodiment of the present invention; Schematic diagram of the structure of a base station device. Mode for carrying out the invention

In order to make the objects, technical solutions and advantages of the present invention more comprehensible, the present invention will be further described in detail below with reference to the embodiments.

When the dedicated channel is allocated to the speaker by the network side, if the current cell can allocate a dedicated channel to the MS, the method for the network side to allocate a dedicated channel to the speaker of the group call is as shown in FIG. 1 . Figure 1 shows a method in which a current cell allocates a dedicated channel for an MS. Taking the group call service of the GSMR as an example, the MS is the talker of the group call, and the BSS and the NSS on the network side allocate a dedicated channel to the MS, and the method includes the following steps:

Step 11: The BSS sends an uplink idle message to the MS, informing the MS that the uplink can be occupied. Step 12: The MS sends an uplink access request to the BSS, and the request occupies the uplink.

Step 13: The BSS receives the uplink access request from the MS, and sends an uplink occupation request to the NSS, requesting to occupy the uplink.

Step 14: The NSS receives the request from the BSS, and sends an uplink occupancy request response message. Give BSS.

Step 15: The MS sends a Layer 2 Frame-Building Frame (SABM) to the BSS, and the mobile phone establishes a link on the group call channel.

Step 16: BSS returns Layer 2 to establish a chain frame confirmation (UA) to the MS.

Step 17: The NSS sends an assignment request to the BSS, requesting the BSS to allocate a proprietary channel to the MS.

Through steps 11 to 17, the MS successfully occupies the group call uplink.

Step 18: The BSS receives the assignment request from the NSS, allocates a dedicated channel to the MS, and sends an assignment completion message to the NSS.

After receiving the NSS assignment request, the BSS allocates a dedicated channel in the cell to the MS, so that the MS establishes a link on the dedicated channel in the cell, and occupies the uplink of the dedicated channel.

Step 19: The NSS receives the assignment completion message from the BSS, confirms that the MS uplink occupation succeeds, and sends the setup parameter to the MS.

The NSS sends a setup parameter message to the MS to inform the MS whether it is the originator of the call and whether the MS needs to listen to the downlink channel of the dedicated channel.

FIG. 2 is a flowchart of a method for allocating a dedicated channel in the embodiment of the present invention. As shown in FIG. 2, a method for allocating a dedicated channel in the embodiment of the present invention includes:

Step 21: The MS successfully occupies the group call uplink.

The method in which the MS successfully occupies the uplink of the group call is basically the same as the method shown in steps 11 to 17. After the MS successfully occupies the group call uplink, the BSS receives the assignment message from the NSS and allocates a dedicated channel to the MS.

Step 22: There is no dedicated channel in the current cell, and the network side switches the MS from the group call channel of the current cell to the dedicated channel of the neighboring cell.

The neighboring cell may share one BSS with the current cell, and may also use a different BSS than the current cell. In the first case, the BSS of the current cell on the network side is directly The MS allocates a proprietary channel within the neighboring cell. In the second case, the BSS of the current cell sends a request for allocating a dedicated channel to the BSS of the neighboring cell through the NSS. If the neighboring cell can allocate a dedicated channel for the current cell, the BSS of the neighboring cell notifies the current through the NSS. The BSS of the cell switches the MS to the proprietary channel of the neighboring cell. At this time, the network side includes the BSS of the current cell, the BSS of the neighboring cell, and the NSS.

If the current cell can allocate a dedicated channel to the MS, the BSS of the current cell allocates a dedicated channel of the current cell to the MS.

It can be seen that, in the embodiment of the present invention, the radio resource of the neighboring cell is used to provide a dedicated channel for the MS of the current cell, thereby effectively solving the problem that the group call service cannot be implemented due to the current radio resource shortage of the cell, thereby avoiding The proprietary channel uplink occupation failure due to insufficient radio resources of the current cell.

Step 23: The MS establishes a link on the proprietary channel of the neighboring cell.

The MS receives the notification of the current cell BSS and switches to the dedicated channel designated by the current cell. The dedicated channel may be a dedicated channel of the current cell or a proprietary channel of the neighboring cell.

Step 24: After receiving the allocation completion message, the NSS sends the setting parameters to the MS.

The process of setting parameters in step 24 is substantially the same as step 19 shown in FIG.

The following describes the method of allocating a dedicated channel by using the same BSS for the current cell and the neighboring cell, and using different BSSs for the current cell and the neighboring cell, respectively.

FIG. 3 is a flow chart showing a method of allocating a dedicated channel in a BSS in an embodiment of the present invention. In this embodiment, the current cell shares a BSS with the neighboring cell, that is, a dedicated channel is allocated in the BSS. The method for the MS to occupy the group call uplink is basically the same as the method shown in steps 11 to 17.

As shown in FIG. 3, the method for allocating a dedicated channel in a BSS in the embodiment of the present invention includes: Step 31: The NSS requires the BSS to allocate a dedicated channel for the MS. Step 32: The BSS sends a handover command to the MS.

The BSS determines if there is a dedicated channel that can be allocated in the cell in which the MS is located. If there is no available radio resource in the current cell, the BSS determines that the neighboring cell has an assignable dedicated channel. When determining that the neighboring cell has an assignable dedicated channel, the BSS on the network side sends a handover command to the MS, and the MS is The group call channel of the current cell switches to the dedicated channel of the neighboring cell.

Step 33: The MS sends a handover access request to the BSS.

The MS requests access on a proprietary channel of a neighboring cell. Since the current cell and the neighboring cell share one BSS, the MS directly sends a handover access request to the BSS of the current cell.

Step 34: The BSS sends a physical message carrying a timing advance to the MS.

Step 35: The MS sends a layer two link frame (SABM) to the BSS.

The MS establishes a link on the proprietary channel of the neighboring cell according to the timing advance carried in the physical message.

Step 36: The BSS returns Layer 2 to establish a chain frame confirmation (UA) to the MS.

After the MS establishes a link on the dedicated channel of the neighboring cell, the BSS sends an acknowledgement message to the MS. Step 37: The MS sends a handover complete message to the BSS.

The MS establishes a link on the dedicated channel of the neighboring cell, and after transmitting the dedicated channel uplink, sends a handover complete message to the BSS, indicating that the switching of the dedicated channel has been completed.

Steps 38 to 39: The steps for setting parameters by the NSS for the MS are basically the same as steps 18 to 19 shown in Figure 1.

FIG. 4 shows a flow of a method of allocating a dedicated channel between BSSs in an embodiment of the present invention. In this embodiment, the current cell and the neighboring cell use different BSSs, and the first BSS is current. The BSS of the cell, the second BSS is the BSS of the neighboring cell of the current cell. The method for the MS to occupy the group call uplink is basically the same as the method shown in steps 11 to 17. As shown in FIG. 4, the method for allocating a dedicated channel between BSSs in the embodiment of the present invention includes:

Step 401: The NSS requires the first BSS to allocate a dedicated channel to the MS.

Step 402: On the network side, the first BSS sends a handover request message to the NSS (Handover

Required ).

Since there is no radio resource available in the current cell, the first BSS switches the MS from the group call channel of the current cell to the dedicated channel of the neighbor cell. Since the neighboring cell is located in the second BSS, the first BSS sends a handover command to the NSS, requesting to allocate a dedicated channel of the neighboring cell.

The handover request sent by the first BSS to the NSS carries the handover reason. By setting the value of the cell representing the handover cause, it indicates that the reason for the handover is that the group call dedicated channel needs to be acquired from the neighboring cell.

In this embodiment, the cell representing the reason for the handover may be an existing cell, and a value different from the existing value is set for the cell. For example, the existing cell representing the reason for the handover is represented by a value of 1-10, indicating different handover reasons. In this embodiment, the value of the cell may be set to 11 to represent that the reason for the handover is required. The group call dedicated channel is obtained from the neighboring cell. In this way, the NSS and the second BSS can know the reason for the handover. The first BSS carries the cell representing the reason for the handover in the handover request and sends it to the NSS.

In addition, the newly added cell can be carried in the handover request, and the reason for the handover is indicated by setting the value of the added cell.

Step 403: The NSS sends a handover request message (Handover Request) to the second BSS of the neighboring cell.

The NSS queries the status of the neighboring cell-specific channel by sending a handover request message to the second BSS, thereby determining whether the neighboring cell has an assignable dedicated channel.

Step 404: The second BSS returns a handover request response message to the NSS. After receiving the handover request message of the NSS, the second BSS knows that the first BSS needs a dedicated channel of the neighboring cell. Determining, by the second BSS, whether the neighboring cell has an assignable dedicated channel, and transmitting the specific channel state information of the neighboring cell in the handover request response message to the NSS, so that the NSS determines the phase Whether the neighboring cell has a dedicated channel that can be allocated. For example, if the neighboring cell can allocate a dedicated channel to the MS, the second BSS notifies the first BSS to switch to the dedicated channel of the neighboring cell through the NSS.

Step 405: The NSS sends a handover command to the first BSS.

After receiving the handover request response message of the second BSS, the NSS determines that the neighboring cell has an assignable dedicated channel, and notifies the first BSS to switch the MS to the dedicated channel of the neighboring cell.

Step 406: The first BSS sends a handover command to the MS, informing the MS to switch to the dedicated channel of the adjacent cell.

Step 407: The MS sends a handover access request to the second BSS of the neighboring cell.

Step 408: The second BSS sends a physical message to the MS.

Step 409: The second BSS sends a handover detection message to the NSS.

The second BSS notifies the NSS by sending a handover detection message, and the MS has accessed the adjacent cell.

Steps 410 to 414: The specific implementation is basically the same as steps 35 to 39 in the embodiment shown in FIG.

The above embodiment implements the allocation of the dedicated channel in the GSMR system, but is a preferred example of the present invention and is not intended to limit the present invention. The invention can also be applied to other digital trunking communication systems, such as a digital trunking system (GT800) based on the GSM system. The base station device and the device for accessing the dedicated channel in the embodiment of the present invention are described in detail based on the method for allocating the dedicated channel in the embodiment of the present invention.

Fig. 5 shows the structure of a base station device in the embodiment of the present invention. In this embodiment, there is no available radio resource in the current cell where the MS accessing the base station device is located, and the dedicated channel cannot be provided, and the base station device allocates the dedicated channel of the neighboring cell to the MS. In this embodiment, the neighboring cell uses a different base station device from the current cell.

As shown in FIG. 5, the base station device of the current cell in the embodiment of the present invention includes: an access module, an allocation module, and an application module. The access module is configured to receive an allocation command of the allocation module, and access the MS to a dedicated channel of the neighboring cell. An access command is sent to the MS, and an access confirmation message from the MS is received.

The allocation module is configured to allocate a dedicated channel to the MS, send an allocation request command to the application module, and receive an allocation request confirmation message from the application module, and learn that the MS can switch to a dedicated channel of the neighboring cell, and send an allocation command to the access module. Receive an allocation confirmation message from the access module.

The application module is configured to perform information interaction between the base station device and the NSS where the base station device is located, receive an allocation request command of the allocation module, send an application command to the NSS, and apply for a dedicated channel of the adjacent cell. Receiving the application confirmation information from the NSS, sending the allocation request confirmation information to the distribution module, and the notification allocation module may allocate the dedicated channel of the neighboring cell to the MS.

If the current cell and the neighboring cell use the same base station device, in the embodiment of the present invention, the application module in the base station device may be omitted, and the allocation module directly allocates the dedicated channel of the neighboring cell to the MS.

The apparatus for accessing a proprietary channel in the present invention includes a first unit and a second unit. The first unit is configured to receive a notification of a dedicated channel from the network side to access the neighboring cell; the second unit is configured to access a dedicated channel of the neighboring cell.

The second unit includes a first subunit and a second subunit. The first subunit is used to send Sending a handover access message to the BSS of the neighboring cell, receiving physical information of the BSS from the neighboring cell, and a second subunit, configured to send a layer 2 link frame frame message to the BSS of the neighboring cell, A layer 2 link frame acknowledgement message is received from the BSS of the neighboring cell.

In the embodiment of the present invention, the device accessing the dedicated channel may be a point-to-multipoint communication service user.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are included in the spirit and scope of the present invention, should be included in the present invention. Within the scope of protection.

Claims

Claim

A method for allocating a dedicated channel, the method comprising: assigning a dedicated channel of a neighboring cell of a cell in which the MS is located if there is no assignable dedicated channel in the cell where the mobile station MS is located Said MS.

The method according to claim 1, wherein the allocating a dedicated channel of a neighboring cell of the cell where the MS is located to the MS includes:

If the neighboring cell has an assignable dedicated channel, the base station subsystem BSS of the cell in which the MS is located allocates a dedicated channel of the neighboring cell to the MS.

The BSS of the cell in which the MS is located applies to the mobile switching subsystem NSS in which the MS is located to allocate a dedicated channel of the neighboring cell;

If the neighboring cell has an assignable dedicated channel, the NSS notifies the BSS of the cell in which the MS is located to switch the MS to a dedicated channel of the neighboring cell.

The method according to claim 3, wherein the BSS of the cell where the MS is located to allocate a dedicated channel of the neighboring cell to the NSS in which the MS is located includes:

The BSS of the cell where the MS is located sends a handover request message to the NSS, and the handover request message carries a handover reason.

The method according to claim 4, wherein the handover reason is carried in the handover request message by a cell representing a handover cause.

The method according to claim 3, further comprising: the NSS querying a status of a dedicated channel of the neighboring cell.

The method according to claim 6, wherein the querying, by the NSS, the status of the dedicated channel of the neighboring cell includes: Sending, by the NSS, a handover request message to a BSS of the neighboring cell; the NSS receiving a handover request response message from a BSS of the neighboring cell, where the handover request response message carries a proprietary of the neighboring cell Channel status information.

8. The method according to claim 3, wherein the MS is a point-to-multipoint communication service user device.

A method for accessing a dedicated channel, the method comprising: receiving a notification from a network side to access a dedicated channel of a neighboring cell;

Access to a proprietary channel of the neighboring cell.

The method according to claim 9, wherein the accessing the dedicated channel to the neighboring cell comprises:

Transmitting a handover access message to the BSS of the neighboring cell, and receiving physical information of the BSS from the neighboring cell;

The sending layer 2 link frame frame message is sent to the BSS of the neighboring cell, and receives a layer 2 link frame acknowledgement message from the BSS of the neighboring cell.

A base station device, comprising:

The base station device according to claim 11, further comprising: an application module, configured to send an application command to the NSS where the base station device is located according to the allocation request command of the allocation module; The NSS application confirmation information, sending an allocation request confirmation information to the allocation module;

The allocating module is further configured to send an allocation request command to the application module, and receive an allocation request confirmation message from the application module.

A device for accessing a dedicated channel, comprising: a first unit, configured to receive a notification from a network side to access a dedicated channel of a neighboring cell; and a second unit, configured to access the A proprietary channel of a neighboring cell.

The device according to claim 13, wherein the second unit comprises: a first subunit, configured to send a handover access message to a BSS of the neighboring cell, and receive from the neighboring cell Physical information of the BSS;

And a second subunit, configured to send a layer 2 link frame message to the BSS of the neighboring cell, and receive a layer 2 link frame acknowledgement message from the BSS of the neighboring cell.

The apparatus according to claim 13, wherein said apparatus is a point-to-multipoint communication service user apparatus.