CN102369757A - Method and apparatus of network selection - Google Patents

Method and apparatus of network selection Download PDF

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Publication number
CN102369757A
CN102369757A CN2009801195502A CN200980119550A CN102369757A CN 102369757 A CN102369757 A CN 102369757A CN 2009801195502 A CN2009801195502 A CN 2009801195502A CN 200980119550 A CN200980119550 A CN 200980119550A CN 102369757 A CN102369757 A CN 102369757A
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China
Prior art keywords
plmn
urgency traffic
cell
subordinate
tenability
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CN2009801195502A
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CN102369757B (en
Inventor
姜怡
焦斌
权威
张戬
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)

Abstract

A method and an apparatus of network selection are provided, and they relate to the field of wireless communication. The method comprises: receiving network selection information sent by user equipment (UE) through a subordinate cell that can support emergency service; after detecting that access reason of said UE is emergency, selecting a Public Land Mobile Network (PLMN) that can support the emergency service for said UE to perform the connection according to the network selection information and the capability information of the PLMN connected with the subordinate cell for supporting the emergency service.

Description

Method and apparatus of network selection
The present invention relates to the method and device of wireless communication field, more particularly to a kind of selection of network for a kind of method and device technical field of network selection.Background technology
LTE (Long Term Evolved, long-term evolving network）It is current 3GPP (3rd Generation Partnership Project, third generation partner program) a kind of mobile communications network for actively studying of tissue Zhong Ge manufacturers, it is UMTS (Universal Mobile Telecommunication System, UMTS）Evolvement network.
In LTE, two kinds of urgent call modes can be supported, one kind is PS (Packet Switch, packet switch）Urgent call；Another is CS (Circuit Switch, circuit switching）Urgent call.Wherein PS urgent calls pass through IMS (IP Multimedia Subsystem, IP multimedia subsystem）Mode realize that and CS urgent calls then pass through CSFB (CS Fallback, circuit switched fallback）Method is realized.In the prior art, UE, probably due to selected network can not support the urgency traffic, causes the urgency traffic access failure when carrying out urgency traffic access, or needs to re-start network selection and access, and reduces the access speed of urgency traffic.The content of the invention
The embodiment provides a kind of method and device of network selection so that the speed that UE carries out urgency traffic access has obtained effective lifting.
Wherein, the method for a kind of network selection provided in an embodiment of the present invention, including：User equipment is received by the way that network selective information that subordinate's cell of urgency traffic is sent can be supported；After the access reason for detecting the user equipment is urgent, the public land mobile network PLMN connected according to the network selective information and subordinate's cell, to the tenability information of urgency traffic, is that the user equipment selection can support the PLMN of the urgency traffic to be attached.
The method of another network selection provided in an embodiment of the present invention, including：Obtain under the transmission of base station Belong to tenability information of the cell to urgency traffic；The subordinate's cell for selecting to support the urgency traffic according to the tenability information carries out urgency traffic access.
The embodiment of the present invention additionally provides a kind of base station, including：Receiving unit：For receiving user equipment by the way that network selective information that subordinate's cell of urgency traffic is sent can be supported；Network selection unit：After being urgent in the access reason for detecting the user equipment, the PLMN connected according to the network selective information and subordinate's cell, to the tenability information of urgency traffic, is that the user equipment selection can support the PLMN of the urgency traffic to be attached.
The embodiments of the invention provide a kind of user equipment, including：Acquiring unit：Tenability information of its subordinate's cell to urgency traffic for obtaining base station transmission；Cell selection unit：For that subordinate's cell of the urgency traffic can be supported to carry out urgency traffic access the tenability information selection of urgency traffic according to above-mentioned subordinate's cell.
The method and device of network selection provided in an embodiment of the present invention, by reference to tenability of the base station subordinate's cell to urgency traffic so that UE can quickly access the network for supporting urgency traffic when initiating urgency traffic.Description of drawings la is a kind of base station side flow chart of the method for network selection provided in an embodiment of the present invention；It is a kind of user equipment side flow chart of the method for network selection provided in an embodiment of the present invention to scheme lb；The flow chart that Fig. 2 applies for a kind of method of network selection provided in an embodiment of the present invention under the scene of urgent call；
Fig. 3 only has part MME to support the flow chart applied under the scene of Emmergency log-on for a kind of method of network selection provided in an embodiment of the present invention in urgent call, and PLMN；
Fig. 4 only has part MME to support the flow chart applied under the scene of Emmergency log-on for a kind of method of network selection provided in an embodiment of the present invention in PLMN；
Fig. 5 is a kind of structural representation of base station provided in an embodiment of the present invention；
Fig. 6 is a kind of structural representation of user equipment provided in an embodiment of the present invention. Embodiment is during the embodiment of the present invention is realized, inventor has found, base station can use urgency traffic tenability to indicate to come to UE (User Equipment, user equipment）Indicate whether each subordinate's cell of the base station supports PS urgent calls.Such as：Urgency traffic tenability can be indicated to pass through NAS (Non-Access Stratum, Non-Access Stratum）(the registration of message, i.e. Attach）Process or TAU (Tracking Area Update, location area updating）Process, is notified to UE, but be likely to occur problems with：
On the one hand, for the UE of normal mode, if the network of registration does not support urgent call, when the UE initiates urgent call, in gravity treatment PLMN (Public Land Mobile Network, public land mobile network）And during cell, it is impossible to it is to support urgent call to know which network in time, is merely able to know by Attach again, if the network of gravity treatment is not still supported, UE also needs to continue gravity treatment, extends the setup time of urgent call；
On the other hand, for the UE of restricted mode, such as：There is no USIM (Universal Subscriber Identity Module, universal subscriber identity module）Card, authenticate not by situations such as, it then can not successfully carry out Attach processes, it thus can not know whether the network supports urgent call, only when really initiating emergency calling process, Emergency Attach (Emmergency log-ons can be passed through）Flow access network, if network does not support urgent call, can refuse the request, similarly subtract the speed of Slow urgent calls foundation.In addition, not all PLMN supports restricted mode UE Emmergency log-on process.Therefore, for restricted mode UE initiate Emmergency log-on when, if it is possible to know whether accessed network supports Emmergency log-on in advance, it can then avoid during be somebody's turn to do, by institute's access network does not support the ability, and it is rejected, increases meaningless time delay.
In order to effectively solve problems of the prior art, inventor proposes a kind of method and device of network selection, the method and apparatus that network of the embodiment of the present invention is selected is described in detail below in conjunction with the accompanying drawings.
It is a kind of method of network selection provided in an embodiment of the present invention as schemed shown in la, the main flow of its base station side, including：
SlOla:User equipment is received by the way that network selective information that subordinate's cell of urgency traffic is sent can be supported； Above-mentioned network selective information can include：The PLMN of user equipment itself selection, access reason are urgent, can also include the information such as MME registered before whether user type is restricted mode or normal mode, user equipment.
S102a:After the access reason for detecting the user equipment is urgent, the public land mobile network PLMN connected according to above-mentioned network selective information and subordinate's cell can support the PLMN of the urgency traffic to be attached the tenability information of urgency traffic for user equipment selection.
Selection PLMN process, can include：If judging the user equipment according to network selective information for restricted mode, selection can support the PLMN of Emmergency log-on to be attached；And/or, if the urgency traffic is urgent call, selection can support the PLMN of urgent call to be attached.So as to ensure that the UE of restricted mode can directly support the PLMN of Emmergency log-on to be attached, the speed and success rate promptly accessed is improved.
It can also include before the step：Tenability information of the PLMN to urgency traffic of above-mentioned subordinate's cell connection is obtained from mobile management entity MME by S1 interface messages.
Above-mentioned PLMN includes to the tenability information of urgency traffic：To the tenability information of urgent call；And/or to the tenability information of Emmergency log-on.
It is that user equipment selection can support the PLMN of urgency traffic to be attached by network side, so as to improve speed and success rate that UE is promptly accessed in the present embodiment.
As further embodiment of this invention, in step 101a, it can also include before：The PLMN connected according to subordinate's cell sets subordinate's cell to the tenability information of urgency traffic to the tenability information of urgency traffic；And subordinate's cell is sent to user equipment to the tenability information of urgency traffic, so that the user equipment can support subordinate's cell of the urgency traffic to carry out urgency traffic access the tenability information selection of urgency traffic according to above-mentioned subordinate's cell.
Wherein, the method for subordinate's cell being sent into user equipment to the tenability information of urgency traffic can be：Subordinate's cell is sent to by user equipment to the tenability information of urgency traffic by the system broadcast message in subordinate's cell.
Above-mentioned subordinate's cell can include to the tenability information of urgency traffic：Urgency traffic tenability Indicate, and/or Emmergency log-on tenability is indicated；Wherein, urgency traffic tenability indicates to be used to indicate whether subordinate's cell supports urgent call；Emmergency log-on tenability indicates to be used to indicate whether subordinate's cell supports Emmergency log-on.
In the present embodiment, by the way that the tenability information to urgency traffic of subordinate's cell is sent into UE so that UE is used as reference during selection cell, so as to ensure that UE can quickly access the network for supporting urgency traffic when initiating urgency traffic.
It is the main flow of user side in the method that a kind of network provided in an embodiment of the present invention is selected as schemed shown in lb, including：
SlOlb:Obtain tenability information of subordinate's cell to urgency traffic of base station transmission；
The above-mentioned tenability information to urgency traffic includes：Urgency traffic tenability is indicated, and/or Emmergency log-on tenability is indicated；Wherein, urgency traffic tenability indicates to be used to indicate whether subordinate's cell supports urgent call；Emmergency log-on tenability indicates to be used to indicate whether subordinate's cell supports Emmergency log-on.
S102b:Subordinate's cell of the urgency traffic can be supported to carry out urgency traffic access the tenability information selection of urgency traffic according to above-mentioned subordinate's cell.
In this access procedure, it can also include：By network selective information by user type it is restricted mode signals base in subordinate's cell, to cause base station after access reason is detected to be urgent, to select that the PLMN of Emmergency log-on can be supported to be attached.
In the present embodiment, by tenability information of subordinate's cell to urgency traffic for obtaining base station transmission, so that UE is used as reference during selection cell, so as to ensure that UE can quickly access the network for supporting urgency traffic when initiating urgency traffic.
As shown in Fig. 2 be a kind of flow chart applied in the case where urgency traffic is the scene of urgent call of method of network selection provided in an embodiment of the present invention, including：
S201 :ENB broadcasts whether its subordinate's cell supports urgent call in system broadcast message.
Before the step, eNB can be obtained and be stored tenability of the connected network to urgent call；Its obtain method can be：ENB is by newly-increased or original S1 interface messages from MME (Mobility Management Entity, mobile management entity）Obtain, above-mentioned original interface messages of S 1 can be： (SI sets up response to SI SETUP RESPONSE）, or MME CONFIGURATION UPDATE (mobile management entity config updates）Etc. message.
In step S201, eNB can notify whether UE subordinate's cells support urgent call by way of broadcasting emergency business support ability in the system broadcast message in subordinate's cell is indicated, the method for setting the urgency traffic tenability to indicate has a variety of, it can be configured according to different strategies, such as, method to set up can be：As long as at least one in the PLMN that subordinate's cell is connected supports urgent call, then put the urgency traffic tenability and be designated as support；When all PLMN that subordinate's cell is connected do not support urgent call, put the urgency traffic tenability and be designated as not supporting.The method for setting the urgency traffic tenability to indicate can also be：As long as MME in the PLMN that subordinate's cell is connected at least one support urgent call, then think that the PLMN supports urgent call, as long as at least one in the PLMN that subordinate's cell is connected supports urgent call, then put the urgency traffic tenability and be designated as support；When all PLMN that subordinate's cell is connected do not support urgent call, put the urgency traffic tenability and be designated as not supporting.
As further embodiment of this invention, can also use urgency traffic tenability indicate represent subordinate's cell to PS urgent calls, and the ability to CS urgent calls, i.e. CSFB tenability.Allow the urgent call for not supporting that the network of PS urgent calls accesses UE, aid in UE to return back to the urgent call that 2G/3G networks carry out circuit domain by way of CSFB.
S202:UE is received and is read cell system broadcast message, knows tenability of the subordinate's cell to urgent call, and selecting one according to above-mentioned tenability can support the cell of urgent call to carry out service access.
S203:UE initiates urgent call in the cell of selected support urgent call.During RRC (Radio Resource Control, wireless heterogeneous networks) connections foundation, to the blunt access reasons of accusing of eNB 4 to be urgent and report UE itself PLMN of selection;
Optionally, MME registered before can also being reported to eNB ^ are blunt UE.
S204:The access reason that eNB detects UE is urgent, is that UE selections can support the PLMN of the business to be attached. During selection PLMN is attached, eNB, to be attached for UE selections PLMN, be able to can specifically include according to the PLMN connected itself stored to the tenability of urgent call, the PLMN of UE itself selections：If the PLMN of UE selections supports urgent call, eNB selects the PLMN, otherwise, and eNB chooses a PLMN for UE at random in the PLMN for supporting urgent call;
If in step S203, UE also reported MME registered before, then during selection PLMN is attached, and eNB can be combined with the registered MME of UE, to select suitable PLMN to be attached for UE, can specifically include：If the PLMN of UE selections supports urgent call, eNB selects the PLMN;Otherwise, eNB may be referred to the PLMN that the registered MME of UE select a support urgent call for UE:If i.e. eNB obtains the registered MME of UE and the affiliated PLMN of the MME support urgent call, eNB then selects the PLMN, otherwise, and eNB chooses a PLMN for UE at random in the PLMN for supporting urgent call.
Afterwards, the MME for selecting to support urgent call in selected PLMN for UE sets up connection.
S205:UE is successfully established urgent call.
In the present embodiment, on the one hand, in system broadcast message it can broadcast whether its subordinate's cell supports urgent call by base station, so that UE is when carrying out PLMN selections and cell selection, the instruction is may be referred to, so as to ensure that UE can quickly access the network for supporting urgent call in the case where initiating urgent call；On the other hand, can be that user equipment directly selects the PLMN of the urgent call can be supported to be attached by reference to tenabilities of each PLMN to urgent call, so as to improve access speed and success rate that UE carries out urgent call.
It is used as further embodiment of this invention, above-mentioned steps S201-S202;Or S203-S204 can also be respectively adopted flow of the prior art and replace, i.e.,：It can select only with the method optimization provided in above-mentioned steps S201-S202 that user equipment is to the selection course of cell in the prior art, or only with the method optimization provided in above-mentioned steps S203-S204 selection course of the network side to PLMN in the prior art.It can also reach that certain raising UE carries out the effect for being successfully accessed rate of urgent call.
As shown in Fig. 3, the method for being a kind of network selection provided in an embodiment of the present invention is in urgency traffic Only have part MME to support the flow chart applied under the scene of Emmergency log-on in urgent call, and PLMN, including：
S301 :ENB broadcasts whether its subordinate's cell supports urgent call and Emmergency log-on in system broadcast message.
Before the step, eNB can be obtained and be stored connected network to urgent call and the tenability of Emmergency log-on；Its method obtained can be eNB by newly-increased or original S1 interface messages from MME (Mobility Management Entity, mobile management entity）Obtain, above-mentioned original S1 interface messages can be：(SI sets up response to SI SETUP RESPONSE）, or the message such as MME CONFIGURATION UPDATE (mobile management entity config update).
In step S301, eNB can notify whether UE subordinate's cells support urgent call by way of broadcasting emergency business support ability in the system broadcast message in subordinate's cell is indicated, the method for setting the urgency traffic tenability to indicate has a variety of, it can be configured according to different strategies, such as, method to set up can be：As long as at least one in the PLMN that subordinate's cell is connected supports urgent call, then put the urgency traffic tenability and be designated as support；When all PLMN that subordinate's cell is connected do not support urgent call, put the urgency traffic tenability and be designated as not supporting.The method for setting the urgency traffic tenability to indicate can also be：As long as MME in the PLMN that subordinate's cell is connected at least one support urgent call, then think that the PLMN supports urgent call, as long as at least one in the PLMN that subordinate's cell is connected supports urgent call, then put the urgency traffic tenability and be designated as support；When all PLMN that subordinate's cell is connected do not support urgent call, put the urgency traffic tenability and be designated as not supporting.
As further embodiment of this invention, can use urgency traffic tenability indicate represent subordinate's cell to PS urgent calls, and the ability to CS urgent calls, i.e. CSFB support.Allow the urgent call for not supporting that the network of PS urgent calls accesses UE, aid in UE to return back to the urgent call that 2G/3G networks carry out circuit domain by way of CSFB.
Also, eNB can register by way of tenability is indicated to notify whether UE subordinate's cells support Emmergency log-on broadcasting emergency in the system broadcast message in subordinate's cell, set the Emmergency log-on branch Holding the method for ability instruction can be：As long as at least one in the PLMN that the eNB is supported supports Emmergency log-on, then put this and be designated as supporting；When the eNB all PLMN supported do not support Emmergency log-on, put this and be designated as not supporting.The method for setting the Emmergency log-on tenability to indicate can also be：As long as MME in the PLMN that subordinate's cell is connected at least one support Emmergency log-on, then think that the PLMN supports Emmergency log-on, as long as at least one in the PLMN that subordinate's cell is connected supports Emmergency log-on, then put the Emmergency log-on tenability and be designated as support；When all PLMN that subordinate's cell is connected do not support Emmergency log-on, put the Emmergency log-on tenability and be designated as not supporting.
It is used as another embodiment of the present invention, the Emmergency log-on tenability being related in above method embodiment can also be indicated to be extended, whether the UE that the instruction can indicate respectively different reasons and enter constrained state can carry out Emmergency log-on, the UE for entering constrained state accordingly, due to different reasons may be referred to corresponding ability instruction progress cell selection.Above-mentioned reason can include：Do not have usim card, authenticate it is invalid etc. not by, usim card.
S302:UE is received and is read cell system broadcast message, knows subordinate's cell to urgent call and the tenability of Emmergency log-on, and select a cell to carry out service access according to above-mentioned tenability.
The method of specifically chosen cell can include：If the UE is normal mode, selection one can support the cell of urgent call；If the UE is restricted mode, needs selection one not only to support urgent call but also support the cell of Emmergency log-on.
S303:UE initiates urgent call in selected cell.It is urgent to eNB report access reasons during RRC (Radio Resource Control, wireless heterogeneous networks) connections foundation.
In the process, UE can be informed eNB by different modes whether it is restricted mode, such as：If the UE is restricted mode, UE is set up in message in RRC connections, carries random number；Otherwise, UE is set up in message in RRC connections, carries the S-TMSI (S-Temporary Mobile Subscriber Identity, Temporary Mobile Subscriber Identity) that the MME registered distributes as it.In addition UE can also report oneself selected PLMN to eNB.Optionally, MME registered before can also being reported to eNB 4 is blunt UE.
Or, UE can inform eNB, and whether it is that the method for restricted mode can also be：UE is in connection During foundation, by whether the state for carrying the PLMN of oneself selection to represent UE is restricted mode or normal mode, if i.e. UE is restricted mode, UE does not carry the PLMN of oneself selection during RRC connections foundation;Otherwise, if the UE is normal mode, UE carries oneself selected PLMN during RRC connections foundation.Optionally, the MME registered before UE can also be reported to eNB.
Or, UE can inform eNB, and whether it is that the method for restricted mode can also be：UE is during connection is set up, by whether the MME registered before carrying is restricted mode or normal mode come the state for representing UE, if i.e. UE is restricted mode, UE is during RRC connections foundation, the MME registered before carrying;Otherwise, if the UE is normal mode, UE does not carry MME registered before during RRC connections foundation.
By that analogy, UE can also inform eNB otherwise whether it is restricted mode, will not be repeated here.
S304:The access reason that eNB detects UE is urgent, judges that connection sets up whether request is initiated by restricted mode UE, is that UE selections can support the PLMN of the business to be attached.
Corresponding to UE in S303 inform whether be restricted mode distinct methods, it is also different that eNB judges that the method whether request is initiated by restricted mode UE is set up in connection, can include：
If UE sets up UE entrained in message in RRC connections and is designated random number, then it is assumed that the UE is restricted mode；Otherwise, UE is designated S-TMSI, then it is assumed that the UE is normal mode.Or, if UE does not carry selected PLMN, then it is assumed that the UE is restricted mode；Otherwise, UE carries selected PLMN, then the UE is normal mode.Or, if UE carries the MME registered before, then it is assumed that the UE is restricted mode；Otherwise, UE does not carry MME registered before, then the UE is normal mode.
ENB is that normal mode UE selects PLMN method to include：The PLMN connected that eNB is stored according to itself, to be attached for UE selections PLMN, can specifically include to the tenability of urgent call, the PLMN of UE itself selections：If the PLMN of UE selections supports urgent call, eNB selects the PLMN, otherwise, and eNB is at random UE in the PLMN for supporting urgent call Choose a PLMN;
Another sunset is foretold, if in step S303, UE also reported MME registered before, then during selection PLMN is attached, eNB can be combined with the registered MME of UE, to select suitable PLMN to be attached for UE, can specifically include：If the PLMN of UE selections supports urgent call, eNB selects the PLMN;Otherwise, eNB may be referred to the PLMN that the registered MME of UE select a support urgent call for UE:If i.e. eNB obtains the registered MME of UE and the affiliated PLMN of the MME support urgent call, eNB then selects the PLMN, otherwise, and eNB chooses a PLMN for UE at random in the PLMN for supporting urgent call;
Afterwards, the MME for selecting to support urgent call in selected PLMN for UE sets up connection.ENB is that restricted mode UE selects PLMN method to include：The PLMN connected that eNB is stored according to itself, to be attached for UE selections PLMN, can specifically include to the tenability of urgent call and Emmergency log-on, the PLMN of UE itself selections：If UE selection PLMN had not only supported urgent call has but also supported Emmergency log-on, eNB selects the PLMN, otherwise, eNB not only supporting urgent call and support Emmergency log-on PLMN in, at random be UE selection one PLMN;
Another sunset is foretold, if in step S303, UE also reported MME registered before, then during selection PLMN is attached, eNB can be combined with the registered MME of UE, to select suitable PLMN to be attached for UE, can specifically include：If UE selection PLMN had not only supported urgent call but also had supported Emmergency log-on, eNB selects the PLMN;Otherwise, eNB may be referred to the registered MME of UE and select a PLMN for not only having supported urgent call but also having supported Emmergency log-on for UE:If i.e. eNB obtains the registered MME of UE and the affiliated PLMN of the MME had not only supported urgent call but also supported Emmergency log-on, eNB then selects the PLMN, otherwise, eNB chooses a PLMN for UE at random in not only supporting urgent call but also supporting the PLMN of Emmergency log-on.
Afterwards, select not only support urgent call for UE in selected PLMN but also support the MME of Emmergency log-on to set up connection.
S305:UE is successfully established urgent call.
In the present embodiment, on the one hand, its subordinate's cell in system broadcast message can be broadcasted by base station Whether urgent call and Emmergency log-on are supported, so that the UE of restricted mode is when carrying out urgent call, can be with reference to emergency call capability and Emmergency log-on ability, to carry out PLMN and cell selection, so as to add the Establishing process for being created as power, accelerating urgency traffic of urgency traffic；On the other hand, can be by reference to each PLMN to urgent call and the tenability of Emmergency log-on, being directly selected for user equipment can support the PLMN of the urgent call and Emmergency log-on to be attached, so as to improve access speed and success rate that UE carries out urgent call.
It is used as further embodiment of this invention, above-mentioned steps S301-S302;Or S303-S304 can also be respectively adopted flow of the prior art and replace, i.e.,：It can select only with the method optimization provided in above-mentioned steps S301-S302 that user equipment is to the selection course of cell in the prior art, or only with the method optimization provided in above-mentioned steps S303-S304 selection course of the network side to PLMN in the prior art.It can also reach that certain raising UE carries out the effect for being successfully accessed rate of urgent call.
As shown in figure 4, only have part MME to support the flow chart applied under the scene of Emmergency log-on in the plmn for a kind of method of network selection provided in an embodiment of the present invention, including：
S401 :ENB broadcasts whether its subordinate's cell supports Emmergency log-on in system broadcast message.
Before the step, eNB can be obtained and be stored tenability of the connected network to Emmergency log-on；Its method obtained can be eNB by newly-increased or original S1 interface messages from MME (Mobility Management Entity, mobile management entity）Obtain, above-mentioned original interface messages of S 1 can be：(SI sets up response to SI SETUP RESPONSE）, or MME CONFIGURATION UPDATE (mobile management entity config updates）Etc. message.
In step S401, eNB can register by way of tenability is indicated to notify whether UE subordinate's cells support Emmergency log-on broadcasting emergency in the system broadcast message in subordinate's cell, the method for setting the Emmergency log-on tenability to indicate has a variety of, it can be configured according to different strategies, such as, method to set up can be：As long as at least one in the PLMN that the eNB is supported supports Emmergency log-on, then put this and be designated as supporting；When the eNB all PLMN supported do not support Emmergency log-on, put this and be designated as not supporting.The specific determination method for setting the Emmergency log-on tenability to indicate can also be：As long as MME in the PLMN that subordinate's cell is connected at least one support Emmergency log-on, then it is assumed that The PLMN supports Emmergency log-on, as long as at least one in the PLMN that subordinate's cell is connected supports Emmergency log-on, then puts the Emmergency log-on tenability and be designated as support；When all PLMN that subordinate's cell is connected do not support Emmergency log-on, put the Emmergency log-on tenability and be designated as not supporting.
It is used as another embodiment of the present invention, the Emmergency log-on tenability being related in above method embodiment can also be indicated to be extended, whether the UE that the instruction can indicate respectively different reasons and enter constrained state can carry out Emmergency log-on, the UE for entering constrained state accordingly, due to different reasons may be referred to corresponding ability instruction progress cell selection.Above-mentioned reason can include：Do not have usim card, authenticate it is invalid etc. not by, usim card.
S402:UE is received and is read cell system broadcast message, knows tenability of the subordinate's cell to Emmergency log-on, and select the cell of a support Emmergency log-on to carry out service access according to above-mentioned tenability.
S403:UE initiates urgency traffic in selected cell.It is urgent to eNB report access reasons during RRC (Radio Resource Control, wireless heterogeneous networks) connections foundation.
In the process, UE can be informed eNB by different modes whether it is restricted mode, specifically referred to the method in the step S303 in Fig. 3 correspondence embodiments, be will not be repeated here.
S404:The access reason that eNB detects UE is urgent, judges that connection sets up whether request is initiated by restricted mode UE, is that UE selections can support the PLMN of the business to be attached.
Corresponding to UE in S403 inform whether be restricted mode distinct methods, it is also different that eNB judges that the method whether request is initiated by restricted mode UE is set up in connection, the method in the step S304 in Fig. 3 correspondence embodiments is specifically referred to, be will not be repeated here.
PLMN systems of selection of the eNB to normal mode UE can be：The PLMN that the PLMN that eNB selections UE is reported is accessed as urgency traffic;Afterwards, a MME is selected to set up connection for UE in selected PLMN.
ENB is that restricted mode UE selects PLMN method to include：The PLMN connected that eNB is stored according to itself, to be attached for UE selections PLMN, can specifically include to the tenability of Emmergency log-on, the PLMN of UE itself selections：If the PLMN of UE selections supports Emmergency log-on, eNB selects the PLMN, otherwise, and eNB is at random UE in the PLMN for supporting Emmergency log-on Choose a PLMN;
Another sunset is foretold, if in step S403, UE also reported MME registered before, then during selection PLMN is attached, eNB can be combined with the registered MME of UE, to select suitable PLMN to be attached for UE, can specifically include：If the PLMN of UE selections supports Emmergency log-on, eNB selects the PLMN;Otherwise, eNB may be referred to the PLMN that the registered MME of UE select a support Emmergency log-on for UE:If i.e. eNB obtains the registered MME of UE and the affiliated PLMN of the MME support Emmergency log-on, eNB then selects the PLMN, otherwise, and eNB chooses a PLMN for UE at random in the PLMN for supporting Emmergency log-on;
Afterwards, the MME for selecting to support Emmergency log-on in selected PLMN for UE sets up connection.
S405:UE is successfully established urgency traffic.
In the present embodiment, on the one hand, in system broadcast message it can broadcast whether its subordinate's cell can support Emmergency log-on by base station so that the UE of restricted mode is when carrying out urgency traffic, Emmergency log-on ability can be referred to, to carry out PLMN and cell selection.So as to add the Establishing process for being created as power, accelerating urgency traffic of urgency traffic；On the other hand, can be that user equipment directly selects the PLMN of the Emmergency log-on can be supported to be attached by reference to tenabilities of each PLMN to Emmergency log-on, so as to improve access speed and success rate that UE carries out urgency traffic.
It is used as further embodiment of this invention, above-mentioned steps S401-S402;Or S403-S404 can also be respectively adopted flow of the prior art and replace, i.e.,：It can select only with the method optimization provided in above-mentioned steps S401-S402 that user equipment is to the selection course of cell in the prior art, or only with the method optimization provided in above-mentioned steps S403-S404 selection course of the network side to PLMN in the prior art.It can also reach that certain raising UE carries out the effect for being successfully accessed rate of urgent call.
It is a kind of structural representation of base station provided in an embodiment of the present invention as shown in Fig. 5, the base station is implemented for the function of base station in above method embodiment, including：
Receiving unit 504:For receiving user equipment by the way that network selective information that subordinate's cell of urgency traffic is sent can be supported；
Network selection unit 505:After being urgent in the access reason for detecting user equipment, according to net Network selects information and the PLMN of subordinate's cell connection to the tenability information of urgency traffic, is that user equipment selection can support the PLMN of urgency traffic to be attached.
The base station may further include：
Acquiring unit 501:Tenability information of the network to urgency traffic for obtaining base station connection.As further embodiment of this invention, the base station can also include：
Indicate setting unit 502:The network connected for the base station obtained according to acquiring unit 501 sets subordinate's cell to the tenability information of urgency traffic to the tenability information of urgency traffic；
Transmitting element 503:For subordinate's cell to be sent into user equipment to the tenability information of urgency traffic, so that the user equipment can support subordinate's cell of the urgency traffic to carry out urgency traffic access the tenability information selection of urgency traffic according to subordinate's cell.
The tenability information can include：Urgency traffic tenability is indicated, and/or Emmergency log-on tenability is indicated；Wherein, urgency traffic tenability indicates to be used to indicate whether subordinate's cell supports urgent call；Emmergency log-on tenability indicates to be used to indicate whether subordinate's cell supports Emmergency log-on.
As shown in fig. 6, for a kind of user equipment provided in an embodiment of the present invention, the user equipment is implemented for the function of user equipment in above method embodiment, including：
Acquiring unit 601:Tenability information of subordinate's cell to urgency traffic for obtaining base station transmission；Wherein, the tenability information can include：Urgency traffic tenability is indicated, and/or Emmergency log-on tenability is indicated；Wherein, urgency traffic tenability indicates to be used to indicate whether subordinate's cell supports urgent call；Emmergency log-on tenability indicates to be used to indicate whether subordinate's cell supports Emmergency log-on.
Cell selection unit 602:For selecting to support subordinate's cell of above-mentioned urgency traffic to carry out urgency traffic access according to above-mentioned tenability information.
As further embodiment of this invention, the user equipment may further include：
User device type notification unit 603, for in subordinate's cell by network selective information by the user type of user equipment be restricted mode signals base, to cause base station after the access reason of user equipment is detected to be urgent, for the user equipment selection PLMN of Emmergency log-on can be supported to be attached.
It is worth noting that, in said apparatus embodiment, included unit is simply patrolled according to function Collect what is divided, but be not limited to above-mentioned division, as long as corresponding function can be realized；In addition, the specific name of each functional unit is also only to facilitate mutually distinguish, the protection domain being not intended to limit the invention.
The above method of the present invention and device embodiment, by eNB in system broadcast message tenability of the broadcast cell to urgency traffic, so that UE is used as reference during selection cell, so as to ensure that UE can quickly access the network for supporting urgency traffic when initiating urgency traffic.Simultaneously, only tenability of the broadcast cell to urgency traffic in cell system broadcast message, combine the instruction of all PLMN that subordinate's cell supported to the tenability of urgency traffic, rather than all PLMN that subordinate's cell supported are broadcasted respectively to the tenability of urgency traffic, save system broadcasts expense；And parameter and each PLMN are reported to the tenability of urgency traffic by eNB combinations UE, to select suitable network connection for UE, the delay that UE only can not correctly select suitable PLMN by the tenability in broadcast message and cause unnecessary signaling consumption to be brought is turn avoid, the Establishing process of urgency traffic is accelerated.
Through the above description of the embodiments, those skilled in the art can be understood that the present invention can be realized by hardware, the mode of necessary general hardware platform can also be added to realize by software.Understood based on such, technical scheme can be embodied in the form of software product, and the software product can be stored in a non-volatile memory medium（Can be CD-ROM, USB flash disk, mobile hard disk etc.）In, including some instructions are to cause a computer equipment（Can be personal computer, server, or network equipment etc.）Perform the method described in each embodiment of the invention.
It is described above; only embodiment of the invention, but protection scope of the present invention is not limited thereto, any one skilled in the art the invention discloses technical scope in; the change or replacement that can be readily occurred in, should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.

Claims (1)

  1. Claims
    1st, a kind of method of network selection, it is characterised in that including：
    User equipment is received by the way that network selective information that subordinate's cell of urgency traffic is sent can be supported；After the access reason for detecting the user equipment is urgent, the public land mobile network PLMN connected according to the network selective information and subordinate's cell, to the tenability information of urgency traffic, is that the user equipment selection can support the PLMN of the urgency traffic to be attached.
    2nd, method according to claim 1, it is characterised in that for the user equipment selection PLMN of the urgency traffic can be supported to be attached described, also included before：
    Tenability information of the PLMN to urgency traffic of subordinate's cell connection is obtained from mobile management entity MME by S1 interface messages.
    3rd, method according to claim 1, it is characterised in that the PLMN includes to the tenability information of urgency traffic：To the tenability information of urgent call；And/or to the tenability information of Emmergency log-on.
    4th, according to any one methods described in claim 1-3 before, it is characterised in that the reception user equipment is also included by that can support network selective information that subordinate's cell of urgency traffic is sent：
    The PLMN connected according to subordinate's cell sets subordinate's cell to the tenability information of urgency traffic to the tenability information of urgency traffic；
    Subordinate's cell is sent to the user equipment to the tenability information of urgency traffic, so that the user equipment can support subordinate's cell of the urgency traffic to carry out urgency traffic access the tenability information selection of urgency traffic according to subordinate's cell.
    5th, method according to claim 4, it is characterised in that
    Subordinate's cell includes to the tenability information of urgency traffic：Urgency traffic tenability is indicated, and/or Emmergency log-on tenability is indicated；
    Wherein, the urgency traffic tenability indicates to be used to indicate whether subordinate's cell supports urgent call；The Emmergency log-on tenability indicates to be used to indicate whether subordinate's cell supports Emmergency log-on.
    6th, method according to claim 5, it is characterised in that described to set subordinate's cell to the tenability information of urgency traffic the tenability information of urgency traffic according to the PLMN, is specifically included： When at least one in the PLMN that subordinate's cell is connected supports urgent call, then put the urgency traffic tenability and be designated as support, otherwise, when all PLMN connected that subordinate's cell is connected do not support urgent call, put the urgency traffic tenability and be designated as not supporting；
    Or, when as the MME in the PLMN that subordinate's cell is connected, at least one supports urgent call, then it is assumed that the PLMN supports urgent call；Otherwise, when at least one in the PLMN that subordinate's cell is connected supports urgent call, then put the urgency traffic tenability and be designated as support, otherwise, when the PLMN that subordinate's cell is connected does not support urgent call, put the urgency traffic tenability and be designated as not supporting.
    7th, method according to claim 5, it is characterised in that described to set subordinate's cell to the tenability information of urgency traffic the tenability information of urgency traffic according to the PLMN, is specifically included：When at least one in the PLMN that subordinate's cell is connected supports Emmergency log-on, then put the Emmergency log-on tenability and be designated as support, otherwise, when all PLMN connected that subordinate's cell is connected do not support Emmergency log-on, put the Emmergency log-on tenability and be designated as not supporting；
    Or, when as the MME in the PLMN that subordinate's cell is connected, at least one supports Emmergency log-on, then it is assumed that the PLMN supports Emmergency log-on；Otherwise, when at least one in the PLMN that subordinate's cell is connected supports Emmergency log-on, then put the Emmergency log-on tenability and be designated as support, otherwise, when the PLMN that subordinate's cell is connected does not support Emmergency log-on, put the Emmergency log-on tenability and be designated as not supporting.
    8th, method according to claim 5, it is characterised in that the urgency traffic tenability indicates to be used to indicate whether subordinate's cell supports urgent call, specifically includes：
    The urgency traffic tenability indicates to be used to represent subordinate's cell to PS urgent calls, and whether CS urgent calls are supported, not support the PLMN of PS urgent calls to have access to the urgent call of the user equipment, and assist said user equipment carries out the urgent call of circuit domain by way of circuit switched fallback CSFB.
    9th, according to any one methods described in claim 1-3, it is characterised in that
    The network selective information, is specifically included：First PLMN of user equipment selection information； The PLMN connected according to the network selective information and subordinate's cell is that the user equipment selection can support the PLMN of the urgency traffic to be attached, specifically included to the tenability information of urgency traffic：
    If the first PLMN supports the urgency traffic, the first PLMN is selected, otherwise, in the PLMN for supporting the urgency traffic, a PLMN is chosen at random for the user equipment;Afterwards, set up and connected by the MME under selected PLMN.
    10th, according to any one methods described in claim 1-3, it is characterised in that
    The network selective information, including：First PLMN of user equipment selection information, and the MME registered before the user equipment information；
    The PLMN connected according to the network selective information and subordinate's cell is that the user equipment selection can support the PLMN of the urgency traffic to be attached, specifically included to the tenability information of urgency traffic：
    If the first PLMN supports the urgency traffic, the first PLMN is selected;Otherwise, a PLMN for supporting the urgency traffic is selected for the user equipment with reference to the MME registered before the user equipment, including：If the affiliated PLMN of the MME registered before user equipment support the urgency traffic, the first PLMN is selected, otherwise, in the PLMN for supporting the urgency traffic, a PLMN is chosen at random for UE;Afterwards, the MME for selecting to support the urgency traffic in selected PLMN for UE sets up connection.
    11st, according to any one methods described in claim 1-3, it is characterised in that
    The network selective information, is specifically included：The user device type of the user equipment is restricted mode；The PLMN connected according to the network selective information and subordinate's cell is that the user equipment selection can support the PLMN of the urgency traffic to be attached, specifically included to the tenability information of urgency traffic：For the user equipment selection of the restricted mode PLMN of Emmergency log-on can be supported to be attached.
    12nd, a kind of method of network selection, it is characterised in that including：
    Obtain tenability information of subordinate's cell to urgency traffic of base station transmission； The subordinate's cell for selecting to support the urgency traffic according to the tenability information carries out urgency traffic access.
    13rd, according to claim 12 methods described, it is characterised in that
    The tenability information to urgency traffic includes：Urgency traffic tenability is indicated, and/or Emmergency log-on tenability is indicated；
    Wherein, the urgency traffic tenability indicates to be used to indicate whether subordinate's cell supports urgent call；The Emmergency log-on tenability indicates to be used to indicate whether subordinate's cell supports Emmergency log-on.
    14th, according to the methods described of claim 12 or 13, it is characterised in that described to select to support subordinate's cell of the urgency traffic to carry out urgency traffic access according to the tenability information, including：By network selective information by user type it is restricted mode signals base in subordinate's cell, to cause the base station after access reason is detected to be urgent, to select that the PLMN of Emmergency log-on can be supported to be attached.
    15th, a kind of base station, it is characterised in that including：
    Receiving unit：For receiving user equipment by the way that network selective information that subordinate's cell of urgency traffic is sent can be supported；
    Network selection unit：After being urgent in the access reason for detecting the user equipment, the PLMN connected according to the network selective information and subordinate's cell, to the tenability information of urgency traffic, is that the user equipment selection can support the PLMN of the urgency traffic to be attached.
    16th, the base station according to claim 15, it is characterised in that also include：
    Acquiring unit：Tenability information of the network to urgency traffic for obtaining the base station connection.
    17th, the base station according to claim 16, it is characterised in that also include：
    Indicate setting unit：The network connected for the base station obtained according to the acquiring unit sets subordinate's cell to the tenability information of urgency traffic to the tenability information of urgency traffic；
    Transmitting element：For subordinate's cell to be sent into the user equipment to the tenability information of urgency traffic, so that the user equipment can support subordinate's cell of the urgency traffic to carry out urgency traffic access the tenability information selection of urgency traffic according to subordinate's cell. 18th, a kind of user equipment, it is characterised in that including：
    Acquiring unit：Tenability information of subordinate's cell to urgency traffic for obtaining base station transmission；Cell selection unit：For that subordinate's cell of the urgency traffic can be supported to carry out urgency traffic access the tenability information selection of urgency traffic according to above-mentioned subordinate's cell.
    19th, the user equipment according to claim 18, it is characterised in that also include：
    User device type notification unit, in subordinate's cell by network selective information by the user type of the user equipment be restricted mode signals base, it is that the user equipment selection can support that the PLMN of Emmergency log-on is connected to cause the base station after the access reason of the user equipment is detected to be urgent
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CN107079047A (en) * 2014-11-17 2017-08-18 英特尔Ip公司 The apparatus and method that domain for network assistance is selected
WO2018145252A1 (en) * 2017-02-07 2018-08-16 华为技术有限公司 Method for network reselection and device
CN110972125A (en) * 2019-11-27 2020-04-07 惠州Tcl移动通信有限公司 Calling method, device, storage medium and terminal
CN113973272A (en) * 2021-12-16 2022-01-25 荣耀终端有限公司 Method, apparatus and storage medium for emergency call

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US10425887B2 (en) 2015-11-10 2019-09-24 Blackberry Limited Gateway selection controlled by network

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US6600917B1 (en) * 1999-10-04 2003-07-29 Telefonaktiebolaget Lm Ericsson (Publ) Telecommunications network broadcasting of service capabilities
US8682279B2 (en) * 2004-05-07 2014-03-25 Interdigital Technology Corporation Supporting emergency calls on a wireless local area network
CN100579278C (en) * 2006-03-03 2010-01-06 华为技术有限公司 Emergent calling method and system and calling conversation control function entity
CN101296509B (en) * 2007-04-28 2012-12-12 华为技术有限公司 Method, system and related device for implementing urgent communication service

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CN107079047A (en) * 2014-11-17 2017-08-18 英特尔Ip公司 The apparatus and method that domain for network assistance is selected
CN107079047B (en) * 2014-11-17 2021-10-29 苹果公司 Apparatus and method for network assisted domain selection
WO2018145252A1 (en) * 2017-02-07 2018-08-16 华为技术有限公司 Method for network reselection and device
CN110972125A (en) * 2019-11-27 2020-04-07 惠州Tcl移动通信有限公司 Calling method, device, storage medium and terminal
CN113973272A (en) * 2021-12-16 2022-01-25 荣耀终端有限公司 Method, apparatus and storage medium for emergency call

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