CN101242632B - A method and base station device for allocating dedicated channel - Google Patents
A method and base station device for allocating dedicated channel Download PDFInfo
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Abstract
The invention discloses a exclusive channel assigning method, when there is no assignable exclusive channel in the cell where mobile station MS is located. The method includes: network side assigns exclusive channel in a cell adjacent to the cell where MS is located to MS; the MS access into exclusive channel of the adjacent cell. The invention also discloses a device of base station. Applying the invention, exclusive channel in adjacent cell can be assigned to MS when there is no assignable exclusive channel in the cell where MS is located, so that occupation failure of exclusive channel caused by lack of wireless resource in the cell where MS is located in group calling service, success rate of uplink occupation in group calling is effectively enhanced.
Description
Technical Field
The present invention relates to the field of global mobile communications technologies, and in particular, to a method and a base station device for allocating a dedicated channel.
Background
The global system for mobile communications (GSM) is used to adopt digital communication technology, and new services can be developed for users to use under different application environments. For example, the GSM System (GSMR) serving railways is a communication platform provided for railway workers, and can meet the increasing demand of railway networks.
In GSMR service, the group call service is a point-to-multipoint communication mode, all users in a cell share one group call channel, all group call users monitor the downlink of the group call channel, the talker of the group call occupies the uplink in two modes, one mode is that the talker directly occupies the uplink of the group call channel, and the group call channel is released in the uplink after the talker releases the talk right; the other method is that the network side allocates a special channel to the speaker, the speaker occupies the uplink of the special channel, and after the speaker releases the talk right, the network side releases the uplink of the special channel.
At present, when a speaker of a group call occupies an uplink in a second manner, a method for a network side to allocate a dedicated channel to the speaker of the group call is shown in fig. 1. Fig. 1 illustrates a method for allocating a dedicated channel on a network side in a group call service of a gsm mr, in which a Mobile Station (MS) is a speaker of a group call, and a Base Station Subsystem (BSS) and a mobile switching subsystem (NSS) on the network side allocate a dedicated channel to the MS, the method comprising:
step 11: the BSS sends an uplink idle message to the MS to inform the MS that the uplink can be occupied.
Step 12: the MS sends an uplink access request to the BSS to request to occupy the uplink.
Step 13: the BSS receives an uplink access request from the MS, and sends an uplink occupation request to the NSS to request to occupy the uplink.
Step 14: the NSS receives the request from the BSS and sends an uplink occupation request response message to the BSS.
Step 15: the MS sends a layer two link establishment frame (SABM) to the BSS, and the mobile phone establishes a link on a group call channel.
Step 16: the BSS returns a layer two link setup frame acknowledgement (UA) to the MS.
And step 17: the NSS sends an assignment request to the BSS, requiring the BSS to allocate a dedicated channel for the MS.
Through the steps 11 to 17, the MS successfully occupies the group call uplink.
Step 18: the BSS receives an assignment request from the NSS, allocates a dedicated channel for the MS, and sends an assignment complete 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 an uplink of the dedicated channel.
Step 19: the NSS receives the assignment completion message from the BSS, confirms that the uplink occupation of the MS is successful, and sends the setting parameters to the MS.
The NSS sends a parameter setting message to the MS to inform the MS whether the MS is a call initiator or not and whether the MS needs to monitor a downlink channel of a special channel or not.
In implementing the present invention, the inventor finds that in the existing method for allocating a dedicated channel, at least the following problems exist: if the speaker occupies the group calling channel and the cell has no idle wireless resource as the exclusive channel, the network side can not allocate the exclusive channel to the speaker. That is, 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 talk right. Therefore, the terminal user may consider the group call service unavailable, and especially when the speakers of the group call are concentrated in a cell without a dedicated channel, anyone may not occupy the uplink of the dedicated channel, and only the group call is ended.
Disclosure of Invention
In view of this, the embodiment of the present invention provides a method for allocating a dedicated channel, which is used to allocate an available dedicated channel to a group call speaker in a group call service, who has no available dedicated channel in a cell where the group call speaker is located.
The embodiment of the invention also provides base station equipment which is used for allocating available exclusive channels to the group call speakers without the exclusive channels available in the cells in the group call service.
The technical scheme of the embodiment of the invention is realized as follows:
a method of allocating a dedicated channel, no dedicated channel being allocatable in a cell in which a mobile station MS is located, the method comprising:
A. the network side allocates the special channel of the adjacent cell of the cell where the MS is located to the MS;
B. the MS accesses a dedicated channel of the neighboring cell;
the step A specifically comprises the following steps:
a base station subsystem BSS of a cell where the MS is located sends a switching command to the MS, and the switching command is used for allocating a special channel of a cell adjacent to the cell where the MS is located to the MS;
the step B specifically comprises the following steps:
the MS sends a switching access message to the BSS of the adjacent cell and receives physical information from the BSS of the adjacent cell;
and the MS sends a layer two link establishment frame message to the BSS of the adjacent cell and receives a layer two link establishment frame confirmation message from the BSS of the adjacent cell.
A base station device comprises a distribution module, an application module and an access module; wherein,
the distribution module is used for sending a distribution request command to the application module, receiving a distribution request confirmation message from the application module, distributing a special channel of an adjacent cell adjacent to a cell where the MS is located for the MS accessed to the base station equipment, sending the distribution command to the access module and receiving the distribution confirmation message from the access module;
the application module is configured to receive the allocation request command from the allocation module, and send an application command to the NSS where the base station device is located; receiving application confirmation information from the NSS, and sending distribution request confirmation information to the distribution module;
the access module is used for receiving the distribution command from the distribution module, sending the access command to the MS and receiving the access confirmation message from the MS.
It can be seen from the above scheme that, in the embodiment of the present invention, when the current cell in the group call service has insufficient radio resources and cannot allocate a dedicated channel, the dedicated channel of the adjacent cell is allocated to the group call speaker of the current cell, thereby avoiding the uplink occupation failure of the dedicated channel caused by the insufficient radio resources of the current cell and effectively improving the success rate of the uplink occupation of the group call.
Drawings
Fig. 1 is a flowchart of a method for allocating a dedicated channel in a conventional group call service;
FIG. 2 is a flow chart of a method for allocating a dedicated channel in an embodiment of the present invention;
fig. 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 in an embodiment of the present invention;
fig. 5 is a schematic diagram of a structure of a base station device in an embodiment of the present invention.
Detailed Description
The core idea of the embodiment of the invention is as follows: in the group calling service, when the current cell can not provide a special channel for the speaker, the special channel of the adjacent cell is allocated to the speaker of the current cell, so that the group calling service in the current cell can be normally carried out.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following examples.
Fig. 2 shows a flow of a method for allocating a dedicated channel in an embodiment of the present invention, and as shown in fig. 2, the method for allocating a dedicated channel in an embodiment of the present invention includes:
step 21: the MS successfully occupies the uplink of the group call.
The method for the MS to successfully occupy the group call uplink is basically the same as the existing method, and is not described herein again. After the MS successfully occupies the group calling uplink, the BSS receives an assignment message from the NSS and allocates a private channel for the MS.
Step 22: the present district has no special channel, the network side switches the MS from the group calling channel of the present district to the special channel of the adjacent district.
Where the neighboring cell may share a BSS with the current cell or may use a different BSS from the current cell. In the first case, the MS is directly allocated a dedicated channel in the neighboring cell by the BSS of the current cell on the network side. In the second case, the BSS of the current cell sends a request for allocating the dedicated channel to the BSS of the neighboring cell through the NSS, and if the neighboring cell can allocate the dedicated channel to the current cell, the BSS of the neighboring cell notifies the BSS of the current cell through the NSS, and the MS is switched to the dedicated channel of the neighboring cell. At this time, the network side includes the BSS of the current cell, the BSS and the NSS of the neighboring cell.
If the current cell can allocate the dedicated channel to the MS, a procedure similar to the existing procedure for allocating the dedicated channel is performed, which is not described herein again.
Therefore, in the embodiment of the invention, the wireless resources of the adjacent cells are utilized to provide the special channel for the MS of the current cell, thereby effectively solving the problem that the group calling service cannot be realized due to the shortage of the wireless resources of the current cell, and avoiding the uplink occupation failure of the special channel due to the shortage of the wireless resources of the current cell.
Step 23: the MS establishes a link on a dedicated channel of a neighboring cell.
And the MS receives the notice of the BSS of the current cell and switches to a special channel appointed by the current cell. The dedicated channel may be a dedicated channel of the current cell or a dedicated channel of an adjacent cell.
Step 24: and after receiving the distribution completion message, the NSS transmits the setting parameters to the MS.
The process of setting the parameters in step 24 is substantially the same as step 19 in the prior art shown in fig. 1, and is not described herein again.
The method for allocating the dedicated channel in the case where the BSS commonly used by the current cell and the neighboring cell and the BSS of the current cell and the BSS of the neighboring cell use different BSSs will be described in detail below.
Fig. 3 is a flowchart illustrating a method for allocating a dedicated channel in a BSS according to an embodiment of the present invention. In this embodiment, the current cell and the neighboring cell share one BSS, i.e., a dedicated channel is allocated within the BSS. The method for the MS to occupy the group call uplink is basically the same as the existing method, and is not described herein again.
As shown in fig. 3, the method for allocating a dedicated channel in a BSS according to the embodiment of the present invention includes:
step 31: NSS requires the BSS to allocate a dedicated channel for the MS.
Step 32: the BSS sends a handover command to the MS.
Assuming that no available wireless resources exist in the current cell, the BSS on the network side sends a handover command to the MS, and the MS is handed over from the group call channel of the current cell 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 dedicated channel of a neighboring cell. Since the current cell and the neighboring cell share one BSS, the MS directly transmits a handover access request to the BSS of the current cell.
Step 34: the BSS sends a physical message carrying a time advance to the MS.
Step 35: the MS sends a layer two link setup frame (SABM) to the BSS.
And the MS establishes a link on a special channel of an adjacent cell according to the time advance carried in the physical message.
Step 36: the BSS returns a layer two link setup frame acknowledgement (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 a special channel of an adjacent cell, and sends a switching completion message to the BSS after occupying the uplink of the special channel to indicate that the switching of the special channel is completed.
Step 38 to step 39: the steps of setting parameters for the MS by the NSS are substantially the same as steps 18 to 19 in the existing distribution-specific network shown in fig. 1, and will not be described in detail here.
Therefore, in the embodiment of the invention, the wireless resources of the adjacent cells are utilized to provide the special channel for the MS of the current cell, thereby effectively solving the problem that the group calling service cannot be realized due to the shortage of the wireless resources of the current cell, and avoiding the uplink occupation failure of the special channel due to the shortage of the wireless resources of the current cell.
Fig. 4 shows a flow of a method for 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, the first BSS is the BSS of the current cell, and 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 existing method, and is not described herein again. 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 for the MS.
Step 402: on the network side, the first BSS sends a handover request message (handed back) to the NSS.
The first BSS switches the MS from the group call channel of the current cell to the dedicated channel of the neighboring cell because there is no available radio resource in the current cell. Since the neighboring cell is located in the second BSS, the first BSS sends a handover command to the NSS for allocating a dedicated channel of the neighboring cell.
The handover request sent by the first BSS to the NSS carries a handover reason, and the value of the cell representing the handover reason is set to indicate that the handover reason is that a group call dedicated channel needs to be acquired from an adjacent cell.
In this embodiment, the cell representing the cause of handover may be an existing cell, and a value different from an existing value is set for the cell. For example, if the cell representing the handover reason in the prior art indicates different handover reasons by taking values of 1 to 10, in this embodiment, the value of the cell may be set to 11 to represent that the handover reason is to acquire a group call dedicated channel from an adjacent cell. In this way, the NSS and the second BSS can know the reason for the handover. The cell representing the cause of the handover is sent to the NSS in a handover request.
In addition, a new cell can be carried in the switching request, and the value of the new cell is set to indicate the reason of switching.
Step 403: the NSS sends a handover request message (handover request) to the second BSS of the neighboring cell.
The NSS queries the state of the neighbor cell dedicated channel by transmitting a handover request message to the second BSS.
Step 404: the second BSS returns a handover request reply message to the NSS.
After receiving the switching request message of the NSS, the second BSS learns that the first BSS needs the special channel of the adjacent cell, and if the adjacent cell can allocate the special channel to the MS, the second BSS informs the first BSS to switch to the special channel of the adjacent cell through the NSS.
Step 405: the NSS sends a handover command to the first BSS.
And after receiving the switching request response message of the second BSS, the NSS informs the first BSS to switch the MS to the special channel of the adjacent cell.
Step 406: the first BSS sends a handover command to the MS informing the MS to handover to a dedicated channel of the neighboring 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 detect message to the NSS.
The second BSS informs the NSS that the MS has accessed to the neighboring cell by sending a handover detect message.
Step 410 to step 414: the specific implementation is substantially the same as steps 35 to 39 in the embodiment shown in fig. 3, and will not be described in detail here.
Therefore, in the embodiment of the invention, the wireless resources of the adjacent cells are utilized to provide the special channel for the MS of the current cell, thereby effectively solving the problem that the group calling service cannot be realized due to the shortage of the wireless resources of the current cell, and avoiding the uplink occupation failure of the special channel due to the shortage of the wireless resources of the current cell.
The above embodiments implement the allocation of the dedicated channel in the GSMR system, which is only 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) with users based on a GSM system.
The base station device in the embodiment of the present invention is explained in detail based on the method of allocating a dedicated channel in the embodiment of the present invention.
Fig. 5 shows a structure of a base station apparatus in the embodiment of the present invention. In this embodiment, the MS accessing the base station device does not have available radio resources in the current cell where the MS is located, and cannot provide a dedicated channel, and the base station device allocates a dedicated channel of an adjacent cell to the MS. It is assumed that, in the present embodiment, the neighboring cell and the current cell use different base station apparatuses.
As shown in fig. 5, the base station device of the current cell in the embodiment of the present invention includes: the device comprises an access module, a distribution module and an application module. The access module is used for receiving the distribution command of the distribution module and accessing the MS to the special channel of the adjacent cell. An access command is sent to the MS and an access confirmation message is received from the MS.
The allocation module is used for allocating a dedicated channel for the MS, sending an allocation request command to the application module, receiving an allocation request confirmation message from the application module, knowing that the MS can be switched to the dedicated channel of the adjacent cell, sending the allocation command to the access module, and receiving the allocation confirmation message from the access module.
The application module is used for performing information interaction between the base station equipment and the NSS where the base station equipment is located, receiving the allocation request command of the allocation module, sending the application command to the NSS, and applying for the special channel of the adjacent cell. And receiving the application confirmation information from the NSS, sending the allocation request confirmation information to the allocation module, and informing the allocation module that the dedicated channel of the adjacent cell can be allocated for the MS.
If the current cell and the adjacent cell use the same base station equipment, in the embodiment of the present invention, the application module in the base station equipment may be omitted, and the allocation module directly allocates the dedicated channel of the adjacent cell to the MS.
Therefore, in the embodiment of the invention, the wireless resources of the adjacent cells are utilized to provide the special channel for the MS of the current cell, thereby effectively solving the problem that the group calling service cannot be realized due to the shortage of the wireless resources of the current cell, and avoiding the uplink occupation failure of the special channel due to the shortage of the wireless resources of the current cell.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A method for allocating a dedicated channel, wherein no dedicated channel is allocatable in a cell in which a mobile station MS is located, the method comprising:
A. the network side allocates the special channel of the adjacent cell of the cell where the MS is located to the MS;
B. the MS accesses a dedicated channel of the neighboring cell;
the step A specifically comprises the following steps:
a base station subsystem BSS of a cell where the MS is located sends a switching command to the MS, and the switching command is used for allocating a special channel of a cell adjacent to the cell where the MS is located to the MS;
the step B specifically comprises the following steps:
the MS sends a switching access message to the BSS of the adjacent cell and receives physical information from the BSS of the adjacent cell;
and the MS sends a layer two link establishment frame message to the BSS of the adjacent cell and receives a layer two link establishment frame confirmation message from the BSS of the adjacent cell.
2. The method of claim 1, wherein the BSS of the cell in which the MS is located is different from the BSS of the neighboring cell, and wherein the step a further comprises:
the BSS of the cell where the MS is located applies for allocating a special channel of an adjacent cell to a mobile switching subsystem (NSS) where the BSS is located;
the NSS informs the BSS of the cell where the MS is located to switch the MS to the exclusive channel of the adjacent cell.
3. The method of claim 2, wherein the NSS further comprises, before notifying the BSS of the cell in which the MS is located to switch the MS to the dedicated channel of the neighboring cell:
the NSS queries the state of the dedicated channel of the neighboring cell.
4. The method according to claim 2, wherein the method for the BSS of the cell in which the MS is located to apply for allocating the dedicated channel of the neighboring cell to the mobile switching subsystem NSS in which the BSS is located is:
the BSS of the cell where the MS is located sends a switching request message carrying a switching reason to the NSS;
the method for the NSS to inform the BSS of the cell where the MS is located to switch the MS to the dedicated channel of the neighboring cell is as follows:
and the NSS sends a switching command to the BSS of the cell in which the MS is positioned.
5. The method of claim 3, wherein the NSS queries the status of the dedicated channel of the neighboring cell by:
the NSS sends a switching request message to the BSS of the adjacent cell; receiving a handover request response message from the neighboring cell.
6. The method of claim 4, wherein the method for carrying the handover reason in the handover request message is: the value of the cell representing the cause of the handover is set.
7. The method according to any of claims 1-6, wherein the MS is a user of a point-to-multipoint communication service.
8. A base station device is characterized in that the base station device comprises an allocation module, an application module and an access module; wherein,
the distribution module is used for sending a distribution request command to the application module, receiving a distribution request confirmation message from the application module, distributing a special channel of an adjacent cell adjacent to a cell where the MS is located for the MS accessed to the base station equipment, sending the distribution command to the access module and receiving the distribution confirmation message from the access module;
the application module is configured to receive the allocation request command from the allocation module, and send an application command to the NSS where the base station device is located; receiving application confirmation information from the NSS, and sending distribution request confirmation information to the distribution module;
the access module is used for receiving the distribution command from the distribution module, sending the access command to the MS and receiving the access confirmation message from the MS.
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| CN 200710004814 CN101242632B (en) | 2007-02-06 | 2007-02-06 | A method and base station device for allocating dedicated channel |
| PCT/CN2008/070028 WO2008095419A1 (en) | 2007-02-06 | 2008-01-04 | Method for allocating dedicated channel and base station device thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200710004814 CN101242632B (en) | 2007-02-06 | 2007-02-06 | A method and base station device for allocating dedicated channel |
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| CN101242632B true CN101242632B (en) | 2011-11-16 |
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| KR101692720B1 (en) * | 2009-02-08 | 2017-01-04 | 엘지전자 주식회사 | Handover method and appratus |
| US8817731B2 (en) * | 2010-01-25 | 2014-08-26 | Nec Corporation | Mobile station apparatus, base station apparatus, radio communication system, control method for mobile station, and control method for base station |
| CN111542000B (en) * | 2020-04-28 | 2022-01-18 | 哈尔滨海能达科技有限公司 | Channel resource sharing method and device, cluster system controller and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1859771A (en) * | 2006-04-17 | 2006-11-08 | 华为技术有限公司 | Multicast broadcast channel distributing method in voice multicast broadcast service |
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| EP1589776A1 (en) * | 2004-04-19 | 2005-10-26 | Telefonaktiebolaget LM Ericsson (publ) | Dynamic allocation of radio resources |
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| CN1859771A (en) * | 2006-04-17 | 2006-11-08 | 华为技术有限公司 | Multicast broadcast channel distributing method in voice multicast broadcast service |
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