CN105338584A - Method for returning to LTE network and device thereof - Google Patents
Method for returning to LTE network and device thereof Download PDFInfo
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- CN105338584A CN105338584A CN201510633802.0A CN201510633802A CN105338584A CN 105338584 A CN105338584 A CN 105338584A CN 201510633802 A CN201510633802 A CN 201510633802A CN 105338584 A CN105338584 A CN 105338584A
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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
Abstract
The invention discloses a method for returning to an LTE network and a device thereof, relates to the technical field of communication, and aims at solving the problems in the prior art that time delay is high due to the fact that returning to the LTE network from a 3G network can be realized only by the process of cell reselection after end of voice business under the occasion of CSFB user inter-MSC switching. The method comprises the steps that after the voice business performed by user equipment through a current MSC ends, the current MSC acquires the type of the attach state of the user equipment via an initial MSC; and when the type of the attach state is joint attach, the current MSC transmits an Iu connection release message to a radio network controller RNC, the Iu connection release message carries a circuit switch fall back CSFB indication field, and the value of the CSFB indication field is a first value so that the RNC is enabled to indicate the user equipment to perform the fast return process to return to the LTE network. The method for returning to the LTE network and the device thereof are applied to the process of performing the voice business in the LTE network.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of method and the device that return LTE network.
Background technology
At present, in the lte networks, when initiating voice call service, usual employing circuit domain dropping (CircuitSwitchFallBack, CSFB) LTE voice call service falls after rise to 2G (2ndGeneration) network or 3G (3rdGeneration) network by technology, provides speech business by 2G/3G network; In 3G network, after voice call service terminates, then adopt based on mobile switching centre (MobileSwitchingCenter, MSC) quick falling (FastReturn) technology, by the information of LTE subdistrict frequency point by wireless heterogeneous networks (RadioResourceControl, RRC) connection release message sends to subscriber equipment, shortens the time that LTE network got back to by subscriber equipment (UserEquipment, UE) as far as possible.
But in prior art, if subscriber equipment is switched to another MSC by initial MSC in communication process, then can only fall back to LTE network by the process of cell reselection by 3G network after speech business terminates, the time delay of this process is larger.
Summary of the invention
The invention provides a kind of method and the device that return LTE network, can reduce under the application scenarios that MSC switching occurs, subscriber equipment falls back to the time delay of LTE network by 3G network.
For achieving the above object, the present invention adopts following technical scheme:
Return a method for LTE network, comprising:
After subscriber equipment is terminated by the speech business that current moving exchanging center MSC carries out, described current MSC obtains the attachment state type of described subscriber equipment by initial MSC;
When described attachment state type is for combining attachment, described current MSC sends Iu connection release message to radio network controller (RNC), described Iu connection release message carries circuit domain dropping CSFB indication field, the value of described CSFB indication field is the first value, so that described RNC indicates described subscriber equipment to perform fall flow process fast after rise to return LTE network.
Return a method for LTE network, comprising:
After subscriber equipment is terminated by the speech business that current MSC carries out, RNC starts timer and carries out timing;
If before timing terminates, described RNC receives the Iu connection release message that current MSC sends, then judge the value of CSFB indication field in described Iu connection release message;
When in described Iu connection release message, the value of CSFB indication field is the first value, equipment for indicating user performs and falls flow process fast after rise to return LTE network.
Return a device for LTE network, described application of installation, in current MSC, comprising:
Acquiring unit, for after subscriber equipment is terminated by the speech business carried out, obtains the attachment state type of described subscriber equipment by initial MSC;
Transmitting element, for when described attachment state type is for combining attachment, Iu connection release message is sent to RNC, described Iu connection release message carries CSFB indication field, the value of described CSFB indication field is the first value, so that described RNC indicates described subscriber equipment to perform fall flow process fast after rise to return LTE network.
Return a device for LTE network, described application of installation, in RNC, comprising:
Timing unit, for after subscriber equipment is terminated by the speech business that current MSC carries out, starts timer and carries out timing;
Judging unit, for when before timing terminates, when RNC receives the Iu connection release message of current MSC transmission, judges the value of CSFB indication field in described Iu connection release message;
Processing unit, for when the value of CSFB indication field described in described Iu connection release message is the first value, equipment for indicating user performs and falls flow process fast after rise to return LTE network.
Method and the device returning LTE network provided by the invention, subscriber equipment by LTE network fall after rise to 3G network and occur MSC switch scene under, after the speech business undertaken by current MSC is terminated, current MSC is by obtaining the type of attachment of subscriber equipment alternately with initial MSC, and when subscriber equipment is for combining attachment, LTE network is returned by the method fallen after rise fast by RNC equipment for indicating user, with prior art, user returns LTE network by the method for cell reselection and compares, the present invention can reduce subscriber equipment is fallen back to LTE network time delay by 3G network, realize subscriber equipment fast return LTE network.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The network architecture schematic diagram that Fig. 1 provides for the embodiment of the present invention;
A kind of schematic flow sheet returning the method for LTE network that Fig. 2 provides for the embodiment of the present invention;
Fig. 3 returns the schematic flow sheet of the method for LTE network for another kind that the embodiment of the present invention provides;
Fig. 4 provide for the embodiment of the present invention another return the schematic flow sheet of the method for LTE network;
Fig. 5 provide for the embodiment of the present invention another return the interaction flow schematic diagram of the method for LTE network;
A kind of structural representation returning the device of LTE network that Fig. 6 provides for the embodiment of the present invention;
Fig. 7 returns the structural representation of the device of LTE network for another kind that the embodiment of the present invention provides.
Embodiment
Below in conjunction with the accompanying drawing in the present embodiment, be clearly and completely described the technical scheme in the present embodiment, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The present invention is mainly used in 3G network, the network architecture that the method returning LTE network provided by the invention is corresponding in 3G network, as shown in Figure 1, specifically comprise: multiple base stations (base station 3 and base station, 4 two, base station are only shown in figure) that RNC2, RNC2 of multiple base stations (base station 1 and base station, 2 two, base station are only shown in figure) that the RNC1 of MSC1 and its correspondence, this RNC1 are corresponding, MSC2 and its correspondence are corresponding.In addition, in this network architecture, attaching position register (HomeLocationRegister is also comprised, HLR), the database of primary responsibility mobile subscriber management, stores and records the subscription data of user in region within the jurisdiction, and dynamically upgrade the positional information of user.By MAPD interface and MSC interactive information.MSC1 with MSC2 all can communicate mutually with HLR.
In conjunction with the above-mentioned network architecture, application scenarios of the present invention is fallen after rise to the subscriber equipment of 3G network by LTE network to have carried out MSC switching in the implementation of speech business.Such as: when subscriber equipment is fallen after rise to 3G network by LTE network, the coverage of base station 1 or base station 2 may be positioned at, when in the process of carrying out speech business, be switched to the coverage of base station 3 or base station 4, then show that the MSC that subscriber equipment is corresponding is switched to MSC2 by MSC1, also namely there occurs MSC and switch.
In conjunction with above-mentioned application scenarios and the network architecture, embodiments provide a kind of method returning LTE network, the method is mainly used in MSC side, as shown in Figure 2, comprising:
101: after subscriber equipment is terminated by the speech business that current moving exchanging center MSC carries out, described current MSC obtains the attachment state type of described subscriber equipment by initial MSC.
Wherein, MSC corresponding when current MSC to be the MSC after switching, the initial MSC of indication be subscriber equipment is attached to 3G network by LTE network at first.The attachment state type of indication for combining attachment, can show that CSFB supported by subscriber equipment; Also can be simple evolved packet system (EvolvedPacketSystem, EPS) attachment, show that subscriber equipment is common LTE subscriber equipment, can only LTE business be carried out, not support CSFB etc.
Generally speaking, to start shooting resident subscriber equipment at LTE, after start, this subscriber equipment can initiate the attachment flow of the EPS/IMSI of associating to mobile management entity (MobilityManagementEntity, MME) and MSC; And the type of this attachment flow is indicated by type of attachment (AttachType); When type is for combining attachment (combined-attach), show that CSFB supported by subscriber equipment.
102: when described attachment state type is for combining attachment, described current MSC sends Iu connection release message to RNC, described Iu connection release message carries circuit domain dropping CSFB indication field, the value of described CSFB indication field is the first value, so that described RNC indicates described subscriber equipment to perform fall flow process fast after rise to return LTE network.
Wherein, fall fast (FastReturn) after rise and refer to that adopting CSFB technology to issue LTE frequency point by the LTE network user's network equipment after the speech business of 3G terminates fallen after rise to 3G helps user to return a kind of technology of LTE network fast; Cell reselection technique refers to that terminal is by receiving system message, measurement and judgement, random access procedure, and the processes such as location updating return the method for LTE.In quick falling technology, network equipment is constantly measured the frequency point information of LTE network and in RRC connection release message, is carried the LTE frequency point information measured for the last time and obtain during speech business, triggers the process independently returning LTE after terminal receives this signaling according to its LTE frequency point information of carrying.Eliminate a large amount of measurement and judgement compared to cell reselection technique, the flow processs such as location updating, thus can shorten the time delay that subscriber equipment returns LTE network as far as possible.
In this step, the CSFB indication field of indication is the new field in the embodiment of the present invention, when the value of this field is the first value, such as: value is 1, then shows that this subscriber equipment is CSFB user; When the value of this field is the second value, then shows that this subscriber equipment is normal user equipments, do not support CSFB.
In the specific implementation process of this step, described current MSC sends Iu connection release message to RNC, and described Iu connection release message carries circuit domain dropping CSFB indication field; Described RNC receives Iu connection release message, resolves this message, obtains the value of CSFB indication field, when this value is first get at that time, indicates described subscriber equipment to perform fall flow process fast after rise to return LTE network according to described Iu connection release message.
The method returning LTE network provided by the invention, subscriber equipment by LTE network fall after rise to 3G network and occur MSC switch scene under, after the speech business undertaken by current MSC is terminated, current MSC is by obtaining the type of attachment of subscriber equipment alternately with initial MSC, and when subscriber equipment is for combining attachment, LTE network is returned by the method fallen after rise fast by RNC equipment for indicating user, with prior art, user returns LTE network by the method for cell reselection and compares, the present invention can reduce subscriber equipment is fallen back to LTE network time delay by 3G network, realize subscriber equipment fast return LTE network.
Method shown in composition graphs 2, step 101 " current MSC obtains the attachment state type of described subscriber equipment by initial MSC ", as shown in Figure 3, specifically comprises:
201: current MSC to attaching position register HLR sends query messages, described query messages comprises the international mobile subscriber identity (InternationalMobileSubscriberIdentificationNumber of described subscriber equipment, IMSI), for asking the attachment state type of described subscriber equipment.
202: after described HLR receives described query messages, initial MSC corresponding to described subscriber equipment is searched according to described IMSI, and send a request message to described initial MSC, described request message comprises described IMSI, for asking the attachment state type of described subscriber equipment.
203: described initial MSC returns the attachment state type of described subscriber equipment to described HLR.
204: described current MSC receives the attachment state type of described subscriber equipment that described HLR forwards.
Corresponding with the method being executed in MSC side, the embodiment of the present invention additionally provides a kind of method returning LTE network, and the method is applied to RNC side, and as shown in Figure 4, the method comprises:
301: after subscriber equipment is terminated by the speech business that current MSC carries out, RNC start timer carries out timing.
302: if before timing terminates, described RNC receive current moving exchanging center MSC send Iu connection release message, then judge the value of CSFB indication field in described Iu connection release message.
303: when in described Iu connection release message, the value of CSFB indication field is the first value, equipment for indicating user performs and falls flow process fast after rise to return LTE network.
As a supplement, the timing time of the timer in step 301 can set an initial value according to network condition, is such as 2s; Then after execution step 301, if before timing terminates, RNC does not receive the Iu connection release message that MSC sends, then record this failure procedures, can be used for subsequent examination signaling process whether wrong or adjust the timing of timer by the number of times of the failure of repeatedly recording.
After execution step 302, when not comprising described CSFB in described Iu connection release message and indicating, then show that subscriber equipment is normal user equipments, then without the need to returning LTE network, normal this speech business of release.
The method returning LTE network of this RNC of the being applied to side that the embodiment of the present invention provides, when in timing time, after RNC receives the Iu connection release message of MSC transmission, by resolving this message, when in this message, the value of CSFB indication field is the first value, then can measure to perform to LTE adjacent cell and fall flow process after rise fast by equipment for indicating user.With prior art, because the MSC after switching cannot the type of attachment of perception subscriber equipment, thus after speech business terminates, the Iu connection release message that current MSC sends to RNC, RNC current user equipment cannot be indicated whether to support CSFB, and then subscriber equipment cannot be back in LTE network by falling after rise fast, only return LTE network by the flow process of cell reselection to compare, the method that the embodiment of the present invention provides can shorten the time delay that subscriber equipment returns LTE network, realizes subscriber equipment fast return LTE network.
As the practical application of said method, the embodiment of the present invention additionally provides a complete schematic flow sheet returning the method for LTE network, and as shown in Figure 5, the method comprises:
401: after subscriber equipment is terminated by the speech business that current MSC carries out, current MSC sends MAPUE type inquiry (MAP_UE_TYPE_INFORMATION) message to HLR, this message mainly comprises IMSI corresponding to subscriber equipment, for asking the attachment state type of subscriber equipment.
Wherein, while execution step 401, RNC side starts timing.
After 402:HLR receives message, the IMSI corresponding according to subscriber equipment, find the initial MSC that subscriber equipment is corresponding, and send request (MAP_SEND_UE_TYPE_INFORMATION_REQ) message, with the attachment state type of asking initial MSC to provide this subscriber equipment to this initial MSC transmission MAPUE type.
403:HLR receives the MAPUE type that initial MSC returns and sends request response (MAP_SEND_UE_TYPE_INFORMATION_ACK) message, and this message comprises the attachment state type of subscriber equipment.
404:HLR returns MAPUE type inquiry response (MAP_UE_TYPE_INFORMATION_ACK) to current MSC, and this message comprises the attachment state type of the subscriber equipment of reception.
405: before timing terminates, current MSC to RNC send the Iu connection release message (IuReleaseCommand) comprising CSFB indication field, and the value of this CSFB indication field is the first value.
After 406:RNC receives this Iu connection release message, discharge this speech business set up carrying (BearerRelease) and the measurement that equipment for indicating user carries out LTE adjacent cell returns LTE network after performing quick falling technology.
407:RNC sends Iu to current MSC and has discharged (IuReleaseComplete) message.
As the specific implementation of method shown in above-mentioned each figure, the embodiment of the present invention additionally provides a kind of device returning LTE network, is applied to current moving exchanging center MSC, and as shown in Figure 6, this device comprises:
Acquiring unit 501, for after subscriber equipment is terminated by the speech business carried out, obtains the attachment state type of described subscriber equipment by initial MSC.
Transmitting element 502, for when described attachment state type is for combining attachment, Iu connection release message is sent to RNC, described Iu connection release message carries CSFB indication field, the value of described CSFB indication field is the first value, so that described RNC indicates described subscriber equipment to perform fall flow process fast after rise to return LTE network.
The device of LTE network that what the embodiment of the present invention provided return, subscriber equipment by LTE network fall after rise to 3G network and occur MSC switch scene under, after the speech business undertaken by current MSC is terminated, current MSC is by obtaining the type of attachment of subscriber equipment alternately with initial MSC, and when subscriber equipment is for combining attachment, LTE network is returned by the method fallen after rise fast by RNC equipment for indicating user, with prior art, user returns LTE network by the method for cell reselection and compares, the present invention can reduce subscriber equipment is fallen back to LTE network time delay by 3G network, realize subscriber equipment fast return LTE network.
Further, described acquiring unit 501, specifically for:
Send query messages to attaching position register HLR, so that after described HLR receives described query messages, search initial MSC corresponding to described subscriber equipment and send the request message of the attachment state type for asking described subscriber equipment to described initial MSC;
Receive the attachment state type of the described subscriber equipment that described HLR forwards.
The embodiment of the present invention additionally provides a kind of device returning LTE network, is applied to radio network controller (RNC), and described device as shown in Figure 7, comprising:
Timing unit 601, for after subscriber equipment is terminated by the speech business that current moving exchanging center MSC carries out, starts timer and carries out timing.
Judging unit 602, for when before timing terminates, when RNC receives the Iu connection release message of current moving exchanging center MSC transmission, judges the value of CSFB indication field in described Iu connection release message.
Processing unit 603, for when the value of CSFB indication field described in described Iu connection release message is the first value, equipment for indicating user performs and falls flow process fast after rise to return LTE network.
The device returning LTE network of this RNC of the being applied to side that the embodiment of the present invention provides, when in timing time, after RNC receives the Iu connection release message of MSC transmission, by resolving this message, when the value that this message comprises CSFB indication field is the first value, then can measure to perform to LTE adjacent cell and fall flow process after rise fast by equipment for indicating user.With prior art, because the MSC after switching cannot the type of attachment of perception subscriber equipment, thus after speech business terminates, the Iu connection release message that current MSC sends to RNC, RNC current user equipment cannot be indicated whether to support CSFB, and then subscriber equipment cannot be back in LTE network by falling after rise fast, only return LTE network by the flow process of cell reselection to compare, the embodiment of the present invention can shorten the time delay that subscriber equipment returns LTE network, realizes subscriber equipment fast return LTE network.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add required common hardware by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in the storage medium that can read, as the floppy disk of computer, hard disk or CD etc., comprise some instructions and perform method described in each embodiment of the present invention in order to make a computer equipment (can be personal computer, server, or the network equipment etc.).
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.
Claims (6)
1. return a method for LTE network, it is characterized in that, comprising:
After subscriber equipment is terminated by the speech business that current moving exchanging center MSC carries out, described current MSC obtains the attachment state type of described subscriber equipment by initial MSC;
When described attachment state type is for combining attachment, described current MSC sends Iu connection release message to radio network controller (RNC), described Iu connection release message carries circuit domain dropping CSFB indication field, the value of described CSFB indication field is the first value, so that described RNC indicates described subscriber equipment to perform fall flow process fast after rise to return LTE network.
2. method according to claim 1, is characterized in that, described current MSC obtains the attachment state type of described subscriber equipment by initial MSC, specifically comprises:
Described current MSC sends query messages to attaching position register HLR, and described query messages, for asking the attachment state type of described subscriber equipment, comprises the international mobile subscriber identity IMSI of described subscriber equipment;
After described HLR receives described query messages, search initial MSC corresponding to described subscriber equipment according to described IMSI, and send a request message to described initial MSC, described request message comprises described IMSI, for asking the attachment state type of described subscriber equipment;
Described initial MSC returns the attachment state type of described subscriber equipment to described HLR;
Described current MSC receives the attachment state type of the described subscriber equipment that described HLR forwards.
3. return a method for LTE network, it is characterized in that, comprising:
After subscriber equipment is terminated by the speech business that current MSC carries out, RNC starts timer and carries out timing;
If before timing terminates, described RNC receives the Iu connection release message that current MSC sends, then judge the value of CSFB indication field in described Iu connection release message;
When in described Iu connection release message, the value of CSFB indication field is the first value, equipment for indicating user performs and falls flow process fast after rise to return LTE network.
4. return a device for LTE network, it is characterized in that, described application of installation, in current MSC, comprising:
Acquiring unit, for after subscriber equipment is terminated by the speech business carried out, obtains the attachment state type of described subscriber equipment by initial MSC;
Transmitting element, for when described attachment state type is for combining attachment, Iu connection release message is sent to RNC, described Iu connection release message carries CSFB indication field, the value of described CSFB indication field is the first value, so that described RNC indicates described subscriber equipment to perform fall flow process fast after rise to return LTE network.
5. device according to claim 4, is characterized in that, described acquiring unit, specifically for:
Send query messages to attaching position register HLR, so that after described HLR receives described query messages, search initial MSC corresponding to described subscriber equipment and send the request message of the attachment state type for asking described subscriber equipment to described initial MSC;
Receive the attachment state type of the described subscriber equipment that described HLR forwards.
6. return a device for LTE network, it is characterized in that, described application of installation, in RNC, comprising:
Timing unit, for after subscriber equipment is terminated by the speech business that current MSC carries out, starts timer and carries out timing;
Judging unit, for when before timing terminates, when RNC receives the Iu connection release message of current MSC transmission, judges the value of CSFB indication field in described Iu connection release message;
Processing unit, for when the value of CSFB indication field described in described Iu connection release message is the first value, equipment for indicating user performs and falls flow process fast after rise to return LTE network.
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| 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 |
| CN110710247A (en) * | 2018-02-05 | 2020-01-17 | Oppo广东移动通信有限公司 | Network returning method and device 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 |
| CN111918272A (en) * | 2019-05-08 | 2020-11-10 | 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 |
| CN110099422A (en) * | 2019-05-21 | 2019-08-06 | 中国联合网络通信集团有限公司 | A kind of CSFB call method for building up, mobile switching centre and phone system |
| WO2021022497A1 (en) * | 2019-08-06 | 2021-02-11 | 华为技术有限公司 | Ims speech communication method, wireless communication apparatus, and communication system |
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