CN105338584B - A kind of method and device returning to LTE network - Google Patents
A kind of method and device returning to LTE network Download PDFInfo
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- CN105338584B CN105338584B CN201510633802.0A CN201510633802A CN105338584B CN 105338584 B CN105338584 B CN 105338584B CN 201510633802 A CN201510633802 A CN 201510633802A CN 105338584 B CN105338584 B CN 105338584B
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- 230000005540 biological transmission Effects 0.000 claims description 8
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- 238000004891 communication Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 101100078001 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) MSC2 gene Proteins 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 101150117600 msc1 gene Proteins 0.000 description 3
- 101150081027 RNC1 gene Proteins 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
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Abstract
The invention discloses a kind of method and devices for returning to LTE network, it is related to field of communication technology, it is existing in the prior art under across the MSC handoff scenario of CSFB user in order to solve, LTE network can only be fallen back to by 3G network by the process of cell reselection after voice service, the larger problem of time delay and invent.Wherein, this method comprises: after the voice service that user equipment is carried out by current MSC, current MSC obtains the attachment state type of user equipment by initial MSC；When attachment state type is joint attachment, current MSC sends Iu connection release message to radio network controller (RNC), the Iu connection release message carries circuit domain dropping CSFB indication field, the value of CSFB indication field is the first value, falls process after rise quickly in order to which RNC instruction user equipment executes to return to LTE network.During present invention application carries out voice service in the lte networks.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of method and devices for returning to LTE network.
Background technique
Currently, in the lte networks, when initiating voice call service, generalling use circuit domain dropping (Circuit
Switch Fall Back, CSFB) technology falls LTE voice call service to 2G (2nd Generation) network or 3G after rise
(3rd Generation) network provides voice service by 2G/3G network；In 3G network, when voice call service terminates
Afterwards, then using the quick falling (Fast Return) for being based on mobile switching centre (Mobile Switching Center, MSC)
The information of LTE subdistrict frequency point is passed through wireless heterogeneous networks (Radio Resource Control, RRC) Connection Release by technology
Message is sent to user equipment, shortens the time that user equipment (User Equipment, UE) returns to LTE network as far as possible.
But in the prior art, if user equipment is switched to another MSC by initial MSC in communication process, when
LTE network can only be fallen back to by 3G network by the process of cell reselection after voice service, the time delay of this process is larger.
Summary of the invention
The present invention provides a kind of method and device for returning to LTE network, can reduce in the application scenarios that MSC switching occurs
Under, user equipment is fallen back to the time delay of LTE network by 3G network.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
A method of returning to LTE network, comprising:
After the voice service that user equipment is carried out by current moving exchanging center MSC, the current MSC passes through
Initial MSC obtains the attachment state type of the user equipment；
When the attachment state type is joint attachment, the current MSC sends Iu to radio network controller (RNC) and connects
Release message is connect, the Iu connection release message carries circuit domain dropping CSFB indication field, the value of the CSFB indication field
For the first value, process is fallen after rise quickly in order to which the RNC indicates that the user equipment executes to return to LTE network.
A method of returning to LTE network, comprising:
After the voice service that user equipment is carried out by current MSC, RNC starts timer and carries out timing；
If the RNC receives the Iu connection release message that current MSC is sent before timing terminates, then described in judgement
The value of CSFB indication field in Iu connection release message；
When the value of CSFB indication field in the Iu connection release message is the first value, instruction user equipment is executed
Fall process after rise quickly to return to LTE network.
A kind of device returning to LTE network, described device are applied to current MSC, comprising:
Acquiring unit, for passing through initial MSC and obtaining the use after user equipment is by the voice service of progress
The attachment state type of family equipment；
Transmission unit, for sending Iu connection release message to RNC when the attachment state type is joint attachment,
The Iu connection release message carries CSFB indication field, and the value of the CSFB indication field is the first value, in order to described
RNC indicates that the user equipment executes and falls process after rise quickly to return to LTE network.
A kind of device returning to LTE network, described device are applied to RNC, comprising:
Timing unit, for after the voice service that user equipment is carried out by current MSC, starting timer to be carried out
Timing；
Judging unit, for when RNC receives the Iu connection release message that current MSC is sent, sentencing before timing terminates
The value of CSFB indication field in the Iu connection release message of breaking；
Processing unit, the value for working as CSFB indication field described in the Iu connection release message are the first value
When, instruction user equipment, which executes, falls process after rise quickly to return to LTE network.
The method and device provided by the invention for returning to LTE network, is fallen after rise to 3G network simultaneously in user equipment by LTE network
Under the scene that MSC switching occurs, after the voice service carried out by current MSC, current MSC by with initial MSC
The type of attachment for obtaining user equipment is interacted, and when user equipment is joint attachment, indicates that user equipment is logical by RNC
It crosses the method quickly fallen after rise and returns to LTE network, in the prior art, user returns to LTE network phase by the method for cell reselection
Than the present invention can reduce the time delay that user equipment is fallen back to LTE network by 3G network, realize that user equipment quickly returns to LTE
Network.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is network architecture schematic diagram provided in an embodiment of the present invention；
Fig. 2 is a kind of flow diagram of method for returning to LTE network provided in an embodiment of the present invention；
Fig. 3 is the flow diagram of another method for returning to LTE network provided in an embodiment of the present invention；
Fig. 4 is the flow diagram of the method for another return LTE network provided in an embodiment of the present invention；
Fig. 5 is the interaction flow schematic diagram of the method for another return LTE network provided in an embodiment of the present invention；
Fig. 6 is a kind of structural schematic diagram of device for returning to LTE network provided in an embodiment of the present invention；
Fig. 7 is the structural schematic diagram of another device for returning to LTE network provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with the attached drawing in the present embodiment, the technical solution in the present embodiment is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
Present invention is mainly applied in 3G network, the method provided by the invention for returning to LTE network is corresponding in 3G network
The network architecture, as shown in Figure 1, specifically including: MSC1 and the corresponding multiple base stations its corresponding RNC1, the RNC1 are (in figure
Base station 1 and the base station of base station 2 two are only shown), MSC2 and the corresponding multiple base stations its corresponding RNC2, RNC2 (only show in figure
Base station 3 and the base station of base station 4 two out).In addition, further including home location register (Home Location in the network architecture
Register, HLR), it is mainly responsible for the database of mobile subscriber's management, stores and records the signing number of user in region within the jurisdiction
According to, and dynamically update the location information of user.Pass through MAP D interface and MSC interactive information.MSC1 and MSC2 can be with
HLR is communicated with each other.
In conjunction with the above-mentioned network architecture, application scenarios of the invention are to be existed by the user equipment that LTE network is fallen after rise to 3G network
MSC switching has been carried out in the implementation procedure of voice service.Such as: when user equipment is fallen after rise by LTE network to 3G network, Ke Nengwei
Coverage area in base station 1 or base station 2 is switched to the covering model of base station 3 or base station 4 during carrying out voice service
It encloses, then shows that the corresponding MSC of user equipment is switched to MSC2 by MSC1, namely MSC switching has occurred.
In conjunction with above-mentioned application scenarios and the network architecture, the embodiment of the invention provides a kind of methods for returning to LTE network, should
Method is mainly used in the side MSC, as shown in Figure 2, comprising:
101: after the voice service that user equipment is carried out by current moving exchanging center MSC, the current MSC
The attachment state type of the user equipment is obtained by initial MSC.
Wherein, current MSC is the MSC after switching, and signified initial MSC is that user equipment is initially attached to by LTE network
Corresponding MSC when 3G network.Signified attachment state type can be joint attachment, show that user equipment supports CSFB；It can also
Think that simple evolved packet system (Evolved Packet System, EPS) adheres to, shows user equipment for common LTE use
Family equipment can only carry out LTE business, not support CSFB etc..
In general, the user equipment resident in LTE booting, the user equipment can be to mobile management entity after booting
(Mobility Management Entity, MME) and MSC initiate the attachment flow of united EPS/IMSI；And pass through attachment
Type (Attach Type) indicates the type of the attachment flow；When type is joint attachment (combined-attach), table
Bright user equipment supports CSFB.
102: when the attachment state type is joint attachment, the current MSC sends Iu Connection Release to RNC and disappears
Breath, the Iu connection release message carry circuit domain dropping CSFB indication field, and the value of the CSFB indication field takes for first
Value falls process after rise quickly in order to which the RNC indicates that the user equipment executes to return to LTE network.
Wherein, quick falling (Fast Return), which refers to, falls the user to 3G after rise in 3G by LTE network using CSFB technology
Voice service after network side equipment issue LTE frequency point user helped quickly to return to a kind of technology of LTE network；Cell
Reselection technique refers to that terminal is returned by receiving system message, measurement and judgement, random access procedure, the processes such as location updating
The method of LTE.In quick falling technology, network side equipment constantly measures the frequency point information of LTE network simultaneously during voice service
It is carried in RRC connection release message and measures obtained LTE frequency point information for the last time, terminal receives basis after this signaling
Its autonomous process for returning to LTE of LTE frequency point information carried triggering.Big measurement is eliminated compared to cell reselection technique and is sentenced
Certainly, the processes such as location updating, it is thus possible to the time delay of shortening user equipment return LTE network as far as possible.
Signified CSFB indication field is the new field in the embodiment of the present invention in this step, when the value of the field is
When the first value, such as: value 1 then shows that the user equipment is CSFB user；When the value of the field is the second value
When, then show that the user equipment is normal user equipments, does not support CSFB.
During the specific implementation of this step, the current MSC sends Iu connection release message to RNC, and the Iu connects
It connects release message and carries circuit domain dropping CSFB indication field；The RNC receives Iu connection release message, parses the message,
The value for obtaining CSFB indication field, when the value takes at that time for first, according to the Iu connection release message instruction use
Family equipment, which executes, falls process after rise quickly to return to LTE network.
The method provided by the invention for returning to LTE network, is fallen after rise to 3G network and is occurred by LTE network in user equipment
Under the scene of MSC switching, after through the voice service of current MSC progress, current MSC with initial MSC by carrying out
Interaction obtains the type of attachment of user equipment, and when user equipment is joint attachment, and it is fast to indicate that user equipment passes through by RNC
The method that speed is fallen after rise returns to LTE network, and in the prior art, user returns to LTE network by the method for cell reselection and compares, this
Invention can reduce the time delay that user equipment is fallen back to LTE network by 3G network, realize that user equipment quickly returns to LTE network.
Method as shown in connection with fig. 2, " current MSC obtains the attachment shape of the user equipment by initial MSC to step 101
State type ", as shown in figure 3, specifically including:
201: current MSC sends query messages to home location register HLR, includes the user in the query messages
International mobile subscriber identity (the International Mobile Subscriber Identification of equipment
Number, IMSI), for requesting the attachment state type of the user equipment.
202: after the HLR receives the query messages, it is corresponding initial that the user equipment being searched according to the IMSI
MSC, and request message is sent to the initial MSC, the request message includes the IMSI, for requesting the user equipment
Attachment state type.
203: the initial MSC returns to the attachment state type of the user equipment to the HLR.
204: the current MSC receives the attachment state type of the user equipment of the HLR forwarding.
Corresponding with the method for being implemented in the side MSC, the embodiment of the invention also provides a kind of methods for returning to LTE network, should
Method is applied to the side RNC, as shown in figure 4, this method comprises:
301: after the voice service that user equipment is carried out by current MSC, RNC starts timer and carries out timing.
302: if the RNC receives the Iu Connection Release that current moving exchanging center MSC is sent before timing terminates
Message then judges the value of CSFB indication field in the Iu connection release message.
303: when the value of CSFB indication field in the Iu connection release message is the first value, indicating user equipment
It executes and falls process after rise quickly to return to LTE network.
As supplement, the timing time of the timer in step 301 can set an initial value according to Network status, such as
For 2s；Then after executing step 301, if RNC does not receive the Iu connection release message of MSC transmission, then before timing terminates
This failure procedures is recorded, whether can be used for subsequent examination signaling process by the number of the failure repeatedly recorded wrong or right
The timing of timer is adjusted.
After executing step 302, when in the Iu connection release message not including CSFB instruction, then show user
Equipment is normal user equipments, then without returning to LTE network, normally discharges this voice service.
The method of this return LTE network applied to the side RNC provided in an embodiment of the present invention, in timing time,
After RNC receives the Iu connection release message of MSC transmission, by parsing the message, when CSFB indication field takes in the message
When value is the first value, then it can indicate that user equipment measures to execute and quickly fall process after rise LTE adjacent cell.With it is existing
In technology, since the MSC after switching can not perceive the type of attachment of user equipment, thus after voice service, current MSC
The Iu connection release message sent to RNC can not indicate whether RNC current user equipment supports CSFB, so user equipment without
Method is back in LTE network by quickly falling after rise, is only capable of comparing by the process return LTE network of cell reselection, the present invention is real
The method for applying example offer can shorten the time delay that user equipment returns to LTE network, realize that user equipment quickly returns to LTE network.
As the practical application of the above method, the embodiment of the invention also provides a complete sides for returning to LTE network
The flow diagram of method, as shown in figure 5, this method comprises:
401: after the voice service that user equipment is carried out by current MSC, current MSC sends MAP UE to HLR
Type inquiry (MAP_UE_TYPE_INFORMATION) message, which mainly includes the corresponding IMSI of user equipment, for asking
Seek the attachment state type of user equipment.
Wherein, while executing step 401, the side RNC starts timing.
After 402:HLR receives message, according to the corresponding IMSI of user equipment, it is corresponding initial to find user equipment
MSC, and send MAP UE type transmission request (MAP_SEND_UE_TYPE_INFORMATION_REQ) to the initial MSC and disappear
Breath, to request initial MSC to provide the attachment state type of the user equipment.
403:HLR receives the MAP UE type that initial MSC is returned and sends request-reply (MAP_SEND_UE_TYPE_
INFORMATION_ACK) message, the message include the attachment state type of user equipment.
404:HLR returns to MAP UE type inquiry response (MAP_UE_TYPE_INFORMATION_ACK) to current MSC,
The message includes the attachment state type of received user equipment.
405: before timing terminates, current MSC sends the Iu connection release message (Iu comprising CSFB indication field to RNC
Release Command), and the value of the CSFB indication field is the first value.
After 406:RNC receives the Iu connection release message, the carrying (Bearer of this voice service foundation is discharged
Release) and indicate that user equipment carries out the measurement of LTE adjacent cell to return to LTE network after executing quick falling technology.
407:RNC sends Iu release to current MSC and completes (Iu Release Complete) message.
As the specific implementation of method shown in above-mentioned each figure, the embodiment of the invention also provides a kind of return LTE networks
Device is applied to current moving exchanging center MSC, as shown in fig. 6, the device includes:
Acquiring unit 501, for passing through initial MSC and obtaining institute after user equipment is by the voice service of progress
State the attachment state type of user equipment.
Transmission unit 502, for sending Iu Connection Release to RNC and disappearing when the attachment state type is joint attachment
Breath, the Iu connection release message carry CSFB indication field, and the value of the CSFB indication field is the first value, in order to institute
It states RNC and indicates that the user equipment executes the quick process that falls after rise to return to LTE network.
The device provided in an embodiment of the present invention for returning to LTE network, is fallen after rise to 3G network simultaneously in user equipment by LTE network
Under the scene that MSC switching occurs, after the voice service carried out by current MSC, current MSC by with initial MSC
The type of attachment for obtaining user equipment is interacted, and when user equipment is joint attachment, indicates that user equipment is logical by RNC
It crosses the method quickly fallen after rise and returns to LTE network, in the prior art, user returns to LTE network phase by the method for cell reselection
Than the present invention can reduce the time delay that user equipment is fallen back to LTE network by 3G network, realize that user equipment quickly returns to LTE
Network.
Further, the acquiring unit 501, is specifically used for:
Query messages are sent to home location register HLR, after receiving the query messages in order to the HLR, are searched
The corresponding initial MSC of the user equipment simultaneously sends attachment state class for requesting the user equipment to the initial MSC
The request message of type；
Receive the attachment state type of the user equipment of the HLR forwarding.
The embodiment of the invention also provides a kind of devices for returning to LTE network, are applied to radio network controller (RNC), institute
Device is stated, as shown in fig. 7, comprises:
Timing unit 601, for being terminated when user equipment by the voice service that current moving exchanging center MSC carries out
Afterwards, starting timer carries out timing.
Judging unit 602, for before timing terminates, RNC to receive the Iu that current moving exchanging center MSC is sent and connects
When connecing release message, the value of CSFB indication field in the Iu connection release message is judged.
Processing unit 603 takes for working as the value of CSFB indication field described in the Iu connection release message for first
When value, instruction user equipment, which executes, falls process after rise quickly to return to LTE network.
The device of this return LTE network applied to the side RNC provided in an embodiment of the present invention, in timing time,
RNC receive MSC transmission Iu connection release message after, by parsing the message, when in the message include CSFB indication field
Value be the first value when, then can indicate user equipment to LTE adjacent cell measure with execute quickly fall after rise process.With
In the prior art, since the MSC after switching can not perceive the type of attachment of user equipment, thus after voice service, when
The Iu connection release message that preceding MSC is sent to RNC, can not indicate whether RNC current user equipment supports CSFB, and then user sets
It is standby to be back in LTE network by quickly falling after rise, it is only capable of comparing by the process return LTE network of cell reselection, this hair
Bright embodiment can shorten the time delay that user equipment returns to LTE network, realize that user equipment quickly returns to LTE network.
Through the above description of the embodiments, it is apparent to those skilled in the art that the present invention can borrow
Help software that the mode of required common hardware is added to realize, naturally it is also possible to which the former is more preferably by hardware, but in many cases
Embodiment.Based on this understanding, the portion that technical solution of the present invention substantially in other words contributes to the prior art
Dividing can be embodied in the form of software products, which stores in a readable storage medium, such as count
The floppy disk of calculation machine, hard disk or CD etc., including some instructions are used so that computer equipment (it can be personal computer,
Server or the network equipment etc.) execute method described in each embodiment of the present invention.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.
Claims (6)
1. a kind of method for returning to LTE network characterized by comprising
After the voice service that user equipment is carried out by current moving exchanging center MSC, the current MSC to ownership position
It sets register HLR and sends query messages, the query messages are used to request the attachment state type of the user equipment, including institute
State the international mobile subscriber identity IMSI of user equipment；The current MSC passes through home location register HLR to initial MSC
Obtain the attachment state type of the user equipment；
When the attachment state type is joint attachment, the current MSC sends Iu connection to radio network controller (RNC) and releases
Put message, the Iu connection release message carries circuit domain dropping CSFB indication field, and the value of the CSFB indication field is the
One value, the CSFB indication field are new field, quickly fall stream after rise in order to which the RNC indicates that the user equipment executes
Journey is to return to LTE network.
2. the method according to claim 1, wherein
After the HLR receives the query messages, according to the corresponding initial MSC of the IMSI lookup user equipment, and to
The initial MSC sends request message, and the request message includes the IMSI, for requesting the attachment shape of the user equipment
State type；
The initial MSC returns to the attachment state type of the user equipment to the HLR；
The current MSC receives the attachment state type of the user equipment of the HLR forwarding.
3. a kind of method for returning to LTE network characterized by comprising
After the voice service that user equipment is carried out by current MSC, RNC starts timer and carries out timing；
If the RNC receives the Iu connection release message that current MSC is sent before timing terminates, then judge that the Iu connects
Connect the value of CSFB indication field in release message；Wherein, the Iu connection release message is the current MSC to homing position
Register HLR sends query messages, and the query messages are used to request the attachment state type of the user equipment, including described
The international mobile subscriber identity IMSI of user equipment, when the attachment state type be joint attachment when, the current MSC to
The Iu connection release message that radio network controller (RNC) is sent；The CSFB indication field is new field；
When the value of CSFB indication field in the Iu connection release message is the first value, instruction user equipment executes quick
Process is fallen after rise to return to LTE network.
4. a kind of device for returning to LTE network, which is characterized in that described device is applied to current MSC, comprising:
Acquiring unit, for being looked into home location register HLR transmission after user equipment is by the voice service of progress
Message is ask, after receiving the query messages in order to the HLR, searches the corresponding initial MSC of the user equipment and to described
Initial MSC sends the request message for requesting the attachment state type of the user equipment；Transmission unit, for when described attached
Status Type when being joint attachment, send Iu connection release message to RNC, the Iu connection release message carries CSFB instruction
Field, the value of the CSFB indication field are the first value, and the CSFB indication field is new field, in order to the RNC
It indicates that the user equipment executes and falls process after rise quickly to return to LTE network.
5. device according to claim 4, which is characterized in that the acquiring unit is also used to:
Receive the attachment state type of the user equipment of the HLR forwarding.
6. a kind of device for returning to LTE network, which is characterized in that described device is applied to RNC, comprising:
Timing unit, for after the voice service that user equipment is carried out by current MSC, starting timer to be counted
When；
Judging unit, for when RNC receives the Iu connection release message that current MSC is sent, judging institute before timing terminates
State the value of CSFB indication field in Iu connection release message；Wherein, the Iu connection release message is the current MSC to returning
Belong to location register HLR and send query messages, the query messages are used to request the attachment state type of the user equipment, packet
The international mobile subscriber identity IMSI for including the user equipment, it is described to work as when the attachment state type is joint attachment
The Iu connection release message that preceding MSC is sent to radio network controller (RNC)；The CSFB indication field is new field；
Processing unit refers to when the value for the CSFB indication field described in the Iu connection release message is the first value
Show that user equipment executes and falls process after rise quickly to return to LTE network.
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| CN201510633802.0A CN105338584B (en) | 2015-09-29 | 2015-09-29 | A kind of method and device returning to LTE network |
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| CN109151802B (en) | 2017-06-15 | 2020-10-16 | 维沃移动通信有限公司 | Access control method, base station and terminal |
| WO2019071496A1 (en) | 2017-10-11 | 2019-04-18 | Oppo广东移动通信有限公司 | Post-network handover return method, access network device and core network device |
| CN107786971A (en) * | 2017-11-07 | 2018-03-09 | 奇酷互联网络科技（深圳）有限公司 | Processing method, device and the mobile terminal of call exception |
| WO2019148552A1 (en) * | 2018-02-05 | 2019-08-08 | Oppo广东移动通信有限公司 | Network return method and apparatus, and computer storage medium |
| WO2020113520A1 (en) * | 2018-12-06 | 2020-06-11 | Oppo广东移动通信有限公司 | Connection establishing method, network device, and terminal device |
| WO2020142960A1 (en) * | 2019-01-09 | 2020-07-16 | Oppo广东移动通信有限公司 | Network communication method and apparatus, and network device |
| CN111918272B (en) * | 2019-05-08 | 2021-11-12 | 大唐移动通信设备有限公司 | Terminal fall-back control method and device |
| CN110099422B (en) * | 2019-05-21 | 2021-04-02 | 中国联合网络通信集团有限公司 | CSFB call establishment method, mobile switching center and call system |
| CN113875287B (en) * | 2019-08-06 | 2023-04-04 | 华为技术有限公司 | IMS voice communication method, wireless communication device and communication system |
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