CN101883407B - Method and device for activating cells accessing different radio access technology (RAT) - Google Patents
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Abstract
The invention provides a method and a device for activating cells accessing different radio access technology (RAT). The method comprises the following steps that: A, when UE accessing first RAT needs services provided by second RAT which is not accessed by the UE at present, the UE sends service requests to a radio access network (RAN) node for managing a cell 1, wherein the cell 1 is a cell in the first RAT detected by the UE; B, after receiving the service requests, the RAN node judges whether the number of the service requests reaches a preset threshold or not, triggers the activation of a cell 2 which is allowed to access the second RAT if the number reaches the preset threshold, so that the cell 2 is not in an energy saving (ES) state any more; and after the cell 2 is successfully activated, the UE initiating the service requests is switched to the cell 2, so that the UE acquires the services provided by the second RAT. Through the method and the device, the cells accessing different RAT are not activated in the special time when OM sends a trigger message or when the load of the RAT1 exceeds the threshold.
Description
Technical Field
The present invention relates to wireless communication technologies, and in particular, to a method and an apparatus for activating a Radio Access Technology (RAT) cell.
Background
In wireless communication technology, a so-called inter-RAT cell is a cell accessing a different RAT. In the inter-RAT Energy Saving (ES) abstraction scenario shown in fig. 1, cells a to C under RAT2 are inter-RAT cells with respect to cells under RAT1, respectively.
Generally, in the inter-RAT ES scenario shown in fig. 1, in order to save resources and reduce wireless signal pollution, the following ES mechanism is adopted: the RF of a cell in a residential area under some RATs is turned off during the day and turned on again in the evening, while the RF of a cell in an office area under other RATs is turned off during the night and turned off again during the day. For example, in fig. 1, if cell a under RAT2 is in a residential area and other cells B to C are in office areas, then according to the above-mentioned ES mechanism, it is necessary to turn off the RF of cell a during the day, i.e. cell a is in the ES state, while the RF of other cells B to C is kept on, and vice versa at night. The following description will be given by taking the day as an example, and the night is similar.
Since cell a is turned off during the day and it can be seen from the scenario shown in fig. 1 that no other cell under RAT2 covers cell a, only RAT1 covers cell a, i.e. the UE in cell a can only access RAT1 but not RAT2 during the day, the following problems occur: the need for the UE in cell a to use RAT2 specific services may not be met because cell a only accesses RAT 1.
To solve the above problem, a trigger message needs to be sent to cell a under RAT2 to activate the cell a. However, when to send the trigger message, there is no current rule, and the common way is: sending a trigger message by the OM at a specific time; or the RAT1 may detect its load and send a trigger message when the load exceeds a threshold. However, these two approaches do not completely solve the above problems for the following reasons: if the time that the UE in cell a needs RAT2 service is neither at the specific time when OM sends the trigger message nor at the time when RAT1 is overloaded with threshold, the trigger message cannot be sent to activate cell a, which obviously does not solve the above technical problem.
Disclosure of Invention
The invention provides a method and a device for activating a different RAT cell, so as to activate the different RAT cell neither at a specific time when OM sends a trigger message nor at a time when RAT1 load exceeds a threshold.
The technical scheme provided by the invention comprises the following steps:
a method for activating a cell of a different RAT, comprising:
a, when a UE accessed to a first RAT needs a service provided by a second RAT which is not accessed, a service request is sent to a Radio Access Network (RAN) node for managing a cell 1; the cell 1 is a cell in the first RAT detected by UE;
b, after receiving the service request, the RAN node judges whether the number of the received service requests reaches a preset threshold, if so, the RAN node triggers the activation operation of the cell 2 which is allowed to be accessed to the second RAT, so that the cell 2 is not in an ES state any more;
and C, after the cell 2 is successfully activated, the RAN node switches the UE initiating the service request to the cell 2 so that the UE obtains the service provided by the second RAT.
A method for activating a cell of a different RAT, comprising:
a, when a UE accessed to a first RAT needs a service provided by a second RAT which is not accessed, a service request is sent to a core network CN node in the first RAT;
b, after receiving the service request, the CN node sends an indication that the UE needs a second RAT service to a Radio Access Network (RAN) node for managing the cell 1; the cell 1 is a cell in the first RAT detected by UE;
c, after receiving the instruction, the RAN node judges whether the number of the received instructions reaches a preset threshold, if so, the RAN node triggers the activation operation of the cell 2 which is allowed to be accessed to the second RAT, so that the cell 2 is not in an ES state any more;
and D, after the cell 2 is successfully activated, the RAN node switches the UE initiating the service request to the cell 2 so that the UE obtains the service provided by the second RAT.
An apparatus for activating a cell of a different RAT, comprising: a UE and a RAN node, wherein,
the UE is currently accessed to a first RAT and is used for sending a service request to a RAN node for managing a cell 1 when the UE needs a service provided by a second RAT which is not accessed; the cell 1 is a cell in the first RAT detected by UE;
the RAN node is configured to manage a cell 1 in the first RAT, determine whether the number of received service requests reaches a preset threshold after receiving the service request, if so, trigger an activation operation of a cell 2 that is allowed to access a second RAT, so that the cell 2 is no longer in an ES state, and switch, after the cell 2 is successfully activated, the UE that initiates the service request to the cell 2, so that the UE obtains a service provided by the second RAT.
An apparatus for activating a cell of a different RAT, comprising: UE, a core network CN node and a RAN node; wherein,
the UE is currently accessed to a first RAT and is used for sending a service request to the CN node when the service provided by a second RAT which is not accessed is needed;
the CN node is positioned in the first RAT and used for sending an indication that the UE needs the service of the second RAT to a RAN node used for managing a cell 1 after receiving the service request; the cell 1 is a cell in the first RAT detected by UE;
the RAN node is configured to manage a cell 1 in the first RAT, determine, after receiving an indication, whether the number of the received indications reaches a preset threshold, if so, trigger an activation operation of a cell 2 that is allowed to access a second RAT, so that the cell 2 is no longer in an ES state, and switch, after the cell 2 is successfully activated, the UE that initiates the service request to the cell 2, so that the UE obtains a service provided by the second RAT.
It can be seen from the above technical solutions that, in the present invention, when a UE having access to a first RAT needs a service provided by a second RAT that is not currently accessed, instead of triggering the activation of a cell of a different RAT according to the two existing manners described in the background art, a RAN node for managing a currently detected cell determines whether to perform an operation of triggering the activation of a cell of a different RAT according to the number of service requests, where the activation manner is not related to a specific time when OM sends a trigger message, nor to a time when a load of the first RAT exceeds a threshold, and obviously, the technical problems described in the background art can be avoided.
Drawings
FIG. 1 is a diagram of a conventional inter-RAT ES scenario;
FIG. 2 is a flow chart of a first embodiment provided by the present invention;
FIG. 3 is a flow chart of a second embodiment provided by the present invention;
FIG. 4 is a block diagram of a first apparatus according to an embodiment of the present invention;
fig. 5 is a structural diagram of a second apparatus according to an embodiment of the present invention.
Detailed Description
The method provided by the embodiment of the invention can ensure that the cell in the ES state under the RAT is not in the ES state when at least one UE in the network needs the service provided by the RAT which is not accessed currently, namely the activation of the cell is realized.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Example 1:
referring to fig. 2, fig. 2 is a flowchart of a first embodiment according to the present invention. Taking the scenario shown in fig. 1 as an example, if in fig. 1, cell a is in an ES state, that is, the RF in cell a is turned off, and no other cell is in the ES state, since cell a currently accesses only RAT1, the UE therein can currently search only a cell under RAT1, such as cell 1 (not shown in fig. 1), and when the UE needs a specific service provided by RAT2 that is not currently accessed, the procedure shown in fig. 2 is performed. As shown in fig. 2, the process may include the following steps:
in step 201, the UE sends a service request to a RAN node (herein referred to as a first RAN node) in the RAT1 for managing cell 1.
Here, the service request may be implemented as a Radio Resource Control (RRC) message, for example, an RRC connection setup complete message or other messages, and the service request is described as an RRC connection setup complete message as an example below. It should be noted that the RRC connection setup complete message is not exactly the same as the existing RRC connection setup complete message, in this embodiment, a cell requiring the second RAT service is added, and as for a specific location of the added cell in the RRC connection setup complete message, the embodiment of the present invention is not particularly limited, for example, it may be located at the forefront or the rearmost of all cells included in the RRC connection setup complete message.
Step 202, after receiving the service request, the first RAN node determines whether the number of the service requests received by the current RAN node reaches a preset threshold, if yes, step 203 is executed; otherwise, step 206 is performed.
Here, the preset threshold may be set based on the emergency situation required by the UE, the optimal utilization of network resources, and the like, and the embodiment is not particularly limited.
Step 203, a cell activation request is sent to a RAN node (here, referred to as a second RAN node) for managing cell a.
Step 204, the second RAN node activates cell a after receiving the cell activation request, and sends a cell activation response to the first RAN node after success.
Here, cell a is activated, i.e., cell a is no longer in the ES state, i.e., the RF of cell a is turned on.
Steps 203 to 204 essentially perform an activation operation for the first RAN node that triggers cell a.
Step 205, the UE initiating the service request is handed over to cell a, so that the UE obtains the service provided by RAT 2. The current flow is ended.
The specific operation of switching the UE from the cell 1 to the cell a in step 205 is similar to that of the conventional method, and is not described herein again.
Step 206, accumulating the number of the received service requests, and returning to execute step 202.
Thus, the process of the first embodiment provided by the embodiment of the present invention is realized.
In the first embodiment, the UE sends the service request directly to the RAN node. As an extension of the embodiment of the present invention, the UE may also directly send a service request to a Core Network (CN) node, and the CN node indicates, to the RAN node, information that the UE needs the RAT2 service, which may be specifically referred to as embodiment two.
Example two:
referring to fig. 3, fig. 3 is a flowchart of a second embodiment provided by the embodiment of the present invention. This embodiment still takes the scenario shown in fig. 1 as an example, if in fig. 1, cell a is in the ES state, i.e. the RF in cell a is turned off, and no other cell is in the ES state. If the UE in cell a can only search for a cell under RAT1, such as cell 1 (not shown in fig. 1), the process shown in fig. 3 is performed when the UE needs a specific service provided by RAT2 that is not currently accessed. As shown in fig. 3, the process may include the following steps:
in step 301, the UE sends a service request to a CN node in the RAT 1.
Here, the service request may be implemented as a non-access stratum (NAS) message, which is not exactly the same as the existing NAS message in this embodiment, and adds an information element requiring RAT2 service. As to the specific location of the added cell in the NAS message, the embodiment of the present invention is not particularly limited, for example, it may be located at the forefront or the rearmost of all cells included in the NAS message.
In step 302, the CN node sends an indication that the UE requires RAT2 traffic to a RAN node (here denoted as the first RAN node) for managing cell 1 in RAT 1.
The indication in this step 302 may specifically be a UE context setup message or a radio bearer setup message, where if the indication in this step 302 is a UE context setup message, the UE context setup message is not identical to an existing UE context setup message and adds a cell requiring the second RAT service, and if the indication in this step 302 is a radio bearer setup message, the radio bearer setup message is not identical to an existing radio bearer setup message and also adds a cell requiring the second RAT service. The specific location of the added cells is not particularly limited in the embodiments of the present invention.
Step 303, after receiving the indication, the first RAN node determines whether the number of the indication reaches a preset threshold, and if so, executes step 304; otherwise, step 307 is executed.
The preset threshold in step 303 may be the same as or different from the preset threshold in step 202.
Steps 304 to 306 are similar to steps 203 to 205, respectively, and are not described herein again.
Step 307, accumulating the number of the received instructions, and returning to execute step 303.
Thus, the flow of the second embodiment provided by the embodiment of the present invention is realized.
The method provided by the embodiment of the invention is described above, and the device provided by the embodiment of the invention is described below.
The present invention provides two devices corresponding to the two embodiments described above, which are described below.
Referring to fig. 4, fig. 4 is a structural diagram of a first apparatus according to an embodiment of the present invention. The implementation of the apparatus corresponds to the first embodiment, as shown in fig. 4, the implementation may specifically include: UE and RAN node.
The UE is currently accessed to a first RAT, and is used for sending a service request to a RAN node for managing a cell 1 when the UE needs a service provided by a second RAT which is not accessed; the cell 1 is a cell in the first RAT detected by UE;
the RAN node is configured to manage a cell 1 in the first RAT, determine whether the number of received service requests reaches a preset threshold after receiving the service request, if so, trigger an activation operation of a cell 2 that is allowed to access a second RAT, so that the cell 2 is no longer in an ES state, and switch, after the cell 2 is successfully activated, the UE that initiates the service request to the cell 2, so that the UE obtains a service provided by the second RAT.
Preferably, in this embodiment, the service request may be an RRC connection setup complete message, which adds an information element that requires the service of the second RAT.
As for another device corresponding to the second embodiment, see fig. 5 in particular. Referring to fig. 5, fig. 5 is a structural diagram of a second apparatus according to an embodiment of the present invention. As shown in fig. 5, the apparatus may include: UE, core network CN node and RAN node.
The UE is currently accessed to a first RAT and is used for sending a service request to the CN node when the UE needs a service provided by a second RAT which is not accessed;
the CN node is positioned in the first RAT and used for sending an indication that the UE needs the service of the second RAT to a RAN node used for managing a cell 1 after receiving the service request; the cell 1 is a cell in the first RAT detected by UE;
the RAN node is configured to manage a cell 1 in the first RAT, determine, after receiving an indication, whether the number of the received indications reaches a preset threshold, if so, trigger an activation operation of a cell 2 that is allowed to access a second RAT, so that the cell 2 is no longer in an ES state, and switch, after the cell 2 is successfully activated, the UE that initiates the service request to the cell 2, so that the UE obtains a service provided by the second RAT.
Preferably, in this embodiment, the service request is a non-access stratum NAS message, which adds a cell requiring a second RAT service;
the indication may be implemented as a UE context setup message or a radio bearer setup message, which adds information elements that require the second RAT service.
It should be noted that, in the apparatus shown in fig. 4 or fig. 5, the performing, by the RAN node, an activation operation of triggering the cell 2 allowed to access the second RAT may specifically include:
the RAN node sends a cell activation request to the RAN node managing the cell 2 so that the RAN node managing the cell 2 activates the cell 2.
The apparatus provided by the embodiment of the present invention has been described so far.
It can be seen from the above technical solutions that, in the present invention, when a UE having access to a first RAT needs a service provided by a second RAT that is not currently accessed, instead of triggering the activation of a cell of a different RAT according to the two existing manners described in the background art, a RAN node for managing a currently detected cell determines whether to perform an operation of triggering the activation of a cell of a different RAT according to the number of service requests, where the activation manner is not related to a specific time when OM sends a trigger message, nor to a time when a load of the first RAT exceeds a threshold, and obviously, the technical problems described in the background art can be avoided.
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 made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method for activating a cell of a different RAT, the method comprising:
a, when a UE accessed to a first RAT needs a service provided by a second RAT which is not accessed, a service request is sent to a Radio Access Network (RAN) node for managing a cell 1; the cell 1 is a cell in the first RAT detected by UE;
b, after receiving the service request, the RAN node judges whether the number of the received service requests reaches a preset threshold, if so, the RAN node triggers the activation operation of a cell 2 which is allowed to be accessed to a second RAT, so that the cell 2 is no longer in an energy saving ES state;
and C, after the cell 2 is successfully activated, the RAN node switches the UE initiating the service request to the cell 2 so that the UE obtains the service provided by the second RAT.
2. The method of claim 1, wherein the service request is a Radio Resource Control (RRC) connection setup complete message that adds information elements that require a second RAT service.
3. A method for activating a cell of a different RAT, the method comprising:
a, when a UE accessed to a first RAT needs a service provided by a second RAT which is not accessed, a service request is sent to a core network CN node in the first RAT;
b, after receiving the service request, the CN node sends an indication that the UE needs a second RAT service to a Radio Access Network (RAN) node for managing the cell 1; the cell 1 is a cell in the first RAT detected by UE;
c, after receiving the indication, the RAN node judges whether the number of the received indications reaches a preset threshold, and if so, triggers the activation operation of the cell 2 which is allowed to be accessed to the second RAT, so that the cell 2 is no longer in an energy saving ES state;
and D, after the cell 2 is successfully activated, the RAN node switches the UE initiating the service request to the cell 2 so that the UE obtains the service provided by the second RAT.
4. The method of claim 3, wherein the service request is a non-access stratum (NAS) message that adds information elements that require a second RAT service;
the indication is a UE context setup message or a radio bearer setup message, which adds information elements that require the second RAT service.
5. The method of claim 2 or 4, wherein the triggering the activation of cell 2 allowed to access the second RAT comprises:
the RAN node sends a cell activation request to the RAN node managing the cell 2 so that the RAN node managing the cell 2 activates the cell 2.
6. An apparatus for activating a cell of a different RAT, the apparatus comprising: a UE and a RAN node, wherein,
the UE is currently accessed to a first RAT and is used for sending a service request to a RAN node for managing a cell 1 when the UE needs a service provided by a second RAT which is not accessed; the cell 1 is a cell in the first RAT detected by UE;
the RAN node is configured to manage a cell 1 in the first RAT, determine whether the number of received service requests reaches a preset threshold after receiving the service request, trigger an activation operation of a cell 2 that is allowed to access a second RAT if the number of received service requests reaches the preset threshold, so that the cell 2 is no longer in an energy saving ES state, and switch a UE that initiates the service request to the cell 2 after the cell 2 is successfully activated, so that the UE obtains a service provided by the second RAT.
7. The apparatus of claim 6, wherein the service request is a Radio Resource Control (RRC) connection setup complete message that adds information elements that require a second RAT service.
8. An apparatus for activating a cell of a different RAT, the apparatus comprising: UE, a core network CN node and a RAN node; wherein,
the UE is currently accessed to a first RAT and is used for sending a service request to the CN node when the service provided by a second RAT which is not accessed is needed;
the CN node is positioned in the first RAT and used for sending an indication that the UE needs the service of the second RAT to a RAN node used for managing a cell 1 after receiving the service request; the cell 1 is a cell in the first RAT detected by UE;
the RAN node is configured to manage a cell 1 in the first RAT, determine, after receiving an indication, whether the number of the received indications reaches a preset threshold, if so, trigger an activation operation of a cell 2 that is allowed to access a second RAT, so that the cell 2 is no longer in an energy saving ES state, and switch, after the cell 2 is successfully activated, the UE that initiates the service request to the cell 2, so that the UE obtains a service provided by the second RAT.
9. The apparatus of claim 8, wherein the service request is a non-access stratum (NAS) message that adds information elements that require a second RAT service;
the indication is a UE context setup message or a radio bearer setup message, which adds information elements that require the second RAT service.
10. The apparatus of claim 7 or 9, wherein the RAN node performing the activation operation that triggers cell 2 of the allowed access second RAT comprises:
the RAN node sends a cell activation request to the RAN node managing the cell 2 so that the RAN node managing the cell 2 activates the cell 2.
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| JP5864750B2 (en) | 2011-08-19 | 2016-02-17 | インターデイジタル パテント ホールディングス インコーポレイテッド | Method and apparatus for using a non-access layer procedure in a mobile station to access component carrier resources belonging to different radio access technologies |
| CN103298046B (en) * | 2012-02-27 | 2016-08-03 | 华为技术有限公司 | The management method of different system cell, device and system |
| US9485235B2 (en) | 2012-03-02 | 2016-11-01 | Qualcomm Incorporated | Systems and methods for inter-network service selection |
| CN104541549A (en) * | 2012-08-14 | 2015-04-22 | 高通股份有限公司 | Inter-network communication to avoid ping-ponging inter-RAT idle reselection |
| CN104885528B (en) * | 2012-12-28 | 2018-09-25 | 意大利电信股份公司 | Cordless communication network, user equipment and the method for operating cordless communication network |
| CN104125628B (en) * | 2013-04-27 | 2018-06-05 | 华为技术有限公司 | A kind of cell sleep control method and the network equipment |
| US9591531B2 (en) * | 2014-07-01 | 2017-03-07 | Google Technology Holdings LLC | Methods and an apparatus for transferring data communication sessions between radio-access networks |
| CN110710249B (en) * | 2017-06-06 | 2021-02-09 | 华为技术有限公司 | A communication method, device and system |
| WO2021223057A1 (en) * | 2020-05-05 | 2021-11-11 | Qualcomm Incorporated | Selecting dual connectivity cell |
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| CN101014186A (en) * | 2006-02-01 | 2007-08-08 | 株式会社泛泰 | Method and apparatus for efficiently managing power-up timer for high-speed inter-radio access technology handover in mobile communication device |
| EP2077690A2 (en) * | 2008-01-07 | 2009-07-08 | Lg Electronics Inc. | Method of reselecting a cell based on priorities |
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