CN100479588C - Method for switching over between systems - Google Patents
Method for switching over between systems Download PDFInfo
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- CN100479588C CN100479588C CNB2005100828018A CN200510082801A CN100479588C CN 100479588 C CN100479588 C CN 100479588C CN B2005100828018 A CNB2005100828018 A CN B2005100828018A CN 200510082801 A CN200510082801 A CN 200510082801A CN 100479588 C CN100479588 C CN 100479588C
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Abstract
The switching method includes steps: based on radio-frequency capability supported by equipment in destination system, equipment in source system or mobile switching center in destination system configures switching request message; the source comm. system is 3G comm. system/2G comm. system, and destination comm. system is 2G comm. system/3G comm. system; equipment in source system sends switching request message to equipment in destination system to make 3G MS switch to destination system from source system. When switching 3G MS, the invention can configure RFC of 3G MS as RFC supported by BSC or RNC in destination system; thus, 3G MS can be switched between 2G and 3G systems freely. The invention is especially applicable to initial stages of 3G network. Since coverage is not large enough, 3G MS can take full advantage of resources of 2G network to raise speech quality of 3G MS.
Description
Technical field
The present invention relates to a kind of network communications technology, relate in particular to the changing method of a kind of 3G (third generation) travelling carriage between 3G communication system and 2G (second generation) communication system.
Background technology
In present communication system, 2G communication system and 3G communication system are also deposited.The user who makes a call might cross over two communication systems in the call process, do not interrupt in order to guarantee user's communication, just need carry out the switching between 2G and the 3G communication system.
Especially at 3G communication system first stage of construction, its coverage rate is wide inadequately, should make full use of the existing resource of 2G network, for the user provides business service.
Yet, can not between 2G and 3G network, switch for the 3G travelling carriage.
This be because, in such as the 2G system of GSM 900 (global system for mobile communications), DCS 1800 and in the 3G system such as UMTS (general mobile network), RFC (RF capabilities) to travelling carriage has done detailed regulation in mobile radio station type sign cell (Mobile station classmark 2 information element), specific as follows:
Wherein, the low three bit representation RF power capability of the 3rd byte abbreviate RFC as.Below two tables provided the RFC span of the travelling carriage that different system supports.
The travelling carriage RFC span that table 1 2G system (second generation communication system) is supported
| Table 10.5.6a/GSM 04.08：Mobile Station Classmark 2 information element |
| RF Power Capability(Octet 3) |
| When GSM 900P，E[or R]band is used |
| Bits |
| 3 2 1 |
| 0 0 0 class 1 |
| 0 0 1 class 2 |
| 0 1 0 class 3 |
| 0 1 1 class 4 |
| 1 0 0 class 5 |
| All other values are reserved. |
| When the DCS 1800 or PCS 1900 band is used Bits |
| 3 2 1 |
| 0 0 0 class 1 |
| 0 0 1 class 2 |
| 0 1 0 class 3 |
| All other values are reserved. |
The travelling carriage RFC span that table 2 3G system (third generation communication system) is supported
| Table 10.5.6/3GPP TS 24.008 Mobile Station Classmark 2 information element |
| RF Power Capability(Octet 3) |
| When UMTS is used，an MS not supporting any GSM band or a multiband GSM MS shall code this field as follows |
| Bits |
| 3 2 1 |
| 1 1 1 RF Power capability is irrelevant in this information element |
| All other values are reserved. |
As above shown in the table, the RFC of the travelling carriage of being supported in the 3G system is 7.And the RFC value of the travelling carriage of being supported in the 2G system is between 0 to 4, and promptly the value of Class 1 is 0, and the value of Class 2 is 1, and the value of Class 3 is 2, and the value of Class 4 is 3, and the value of Class 5 is 4.
In the prior art, whether BSC/RNC (base station controller/radio network controller) mates with the RFC that oneself supports by the RFC of this parameter testing travelling carriage, if do not match, BSC/RNC refusal travelling carriage inserts, if coupling just allows to insert.Because the RFC of the travelling carriage of 3G system support is 7, and the 2G system does not support that its RFC is the access of 7 travelling carriage, therefore, the 3G travelling carriage of conversing in the 3G system can not switch in the 2G system, and the 3G travelling carriage of conversing in the 2G system can not switch to the 3G system, so the 3G travelling carriage can not switch between 3G system and 2G system.
Summary of the invention
At the above-mentioned defective of prior art, the purpose of this invention is to provide a kind of internetwork changing method, the 3G travelling carriage is switched in 3G system and 2G system.
The present invention is achieved through the following technical solutions, and the invention provides the changing method between a kind of system, when third generation travelling carriage from the sources traffic system when the destinations traffic system is switched, described changing method comprises:
A, RF capabilities in mobile switching centre's handoff request message of the equipment of sources traffic system or destinations traffic system is set to the RF capabilities that the equipment of destinations traffic system is supported, described sources traffic system is third generation communication system/second generation communication system, described destinations traffic system is second generation communication system/third generation communication system, wherein, the equipment of described sources traffic system comprises Mobile Switching Center Server/mobile switching centre or radio network controller, and the equipment of described destinations traffic system comprises base station controller or radio network controller;
The equipment of B, sources traffic system sends handoff request message to the equipment of destinations traffic system, and third generation travelling carriage is switched to the destinations traffic system by the sources traffic system.
Be provided with tables of data in the mobile switching centre of the equipment of sources traffic system or destinations traffic system, this tables of data comprises the base station controller of each sub-district or the RF capabilities scope that radio network controller is supported.
Before the described steps A, further comprise:
The equipment of A1, sources traffic system obtains Target Cell Identifier;
The RF capabilities that the mobile switching centre of the equipment of A2, sources traffic system or destinations traffic system supports by the base station controller of tables of data acquisition Target cell according to Target Cell Identifier.
Then described steps A comprises:
RF capabilities in mobile switching centre's handoff request message of the equipment of sources traffic system or destinations traffic system is set to the RF capabilities that the target cell base station controller is supported.
Described steps A 2 also comprises: the RF capabilities that the mobile switching centre of the equipment of sources traffic system or destinations traffic system supports by the radio network controller of tables of data acquisition Target cell according to Target Cell Identifier.
Described steps A also comprises: the RF capabilities in mobile switching centre's handoff request message of the equipment of sources traffic system or destinations traffic system is set to the RF capabilities that the radio network controller of Target cell is supported.
According to the present invention, when the 3G travelling carriage switched, the RFC that can dispose neatly the 3G travelling carriage was configured to the RFC that BSC or RNC supported in the goal systems, therefore, the 3G travelling carriage was freely switched between 2G and 3G system.Especially at the 3G networking initial stage,, make the 3G travelling carriage can make full use of the 2G Internet resources, thereby can reduce the cutting off rate of 3G travelling carriage when conversation, improved the speech quality of 3G travelling carriage because its covering is extensive inadequately.
Description of drawings
Fig. 1 shows the flow chart that intra-office switches from the UMTS system to gsm system;
Fig. 2 shows the flow chart that interoffice switches from the UMTS system to gsm system.
Embodiment
Understand and realization the present invention the existing embodiments of the invention of describing in conjunction with the accompanying drawings for the ease of persons skilled in the art.
The invention discloses the changing method between a kind of system, when third generation travelling carriage from the sources traffic system when the destinations traffic system is switched, the RFC that the MSC of the equipment of sources traffic system or destinations traffic system (mobile switching centre) supports according to the equipment of destinations traffic system is configured handoff request message, described sources traffic system is third generation communication system/second generation communication system, and described destinations traffic system is second generation communication system/third generation communication system; The equipment of sources traffic system sends handoff request message to the equipment of destinations traffic system, and third generation travelling carriage is switched between third generation communication system and second communication system.The equipment of described sources traffic system comprises MSC Server (Mobile Switching Center Server)/MSC or RNC (radio network controller).The equipment of described destinations traffic system comprises BSC or RNC.
The gsm system that switches to the 2G system with the UMTS system of 3G system is an example below, and concrete switching flow is described in detail.
Fig. 1 shows the switching flow figure of same intra-exchange from the equipment of UMTS system to the equipment of gsm system, and being set to the RFC that the target cell base station controller supported with the RF capabilities in the MSC handoff request message is example, and its idiographic flow comprises:
Step 1, user terminal RNS RNS-A conversation, in the time will switching, RNS-A reports reconfiguration request (Iu-Relocation-Required) by the Iu interface to the 3G_MSC-A of mobile switching centre of 3G network, require 3G_MSC-A to switch, in this reconfiguration request message, carry the RFC of travelling carriage;
After step 2,3G_MSC-A received the reconfiguration request that RNS-A reports, the RFC of described travelling carriage was set to the RFC that Target cell BSC or RNC are supported.
Concrete method to set up can for:
Be provided with tables of data in the equipment of sources traffic system, this tables of data comprises BSC or the sign of RNC and the RFC scope of being supported thereof of each sub-district.
When the request of 3G travelling carriage was switched, the equipment of sources traffic system (as MSC Server/MSC or RNC) obtained Target Cell Identifier; Then, the equipment of sources traffic system obtains the BSC of Target cell or the RFC that RNC supported of Target cell according to Target Cell Identifier by tables of data; Then, the RFC in the equipment handoff request message of sources traffic system is set to the RFC that Target cell BSC or RNC are supported.
Step 3, target BS S-B return acknowledge message (A-Handover-Request-Ack) to 3G_MSC-A after finishing the Radio Resource preparation;
Step 4,3G_MSC-A issue reprovision order (Iu-Relocation-Command) to RNS-A;
Step 5, RNA-A eat dishes without rice or wine to issue switching command (RRC-HO-Command), require user terminal to be linked on the target BS S-B from source RNS-A;
Step 6, user terminal (UE/MS) are eating dishes without rice or wine to report switching to insert message (RI-HO-Access), and the expression user terminal is attempted inserting to target BS BSS-B;
Step 7, BSS-B send switching detection message to 3G_MSC-A, and expression has detected user terminal and inserted;
Step 8, user terminal are eating dishes without rice or wine to report the switching access to finish message (RI-HO-Complete), and the expression user terminal successfully inserts its station of target BSS-B;
Step 9, BSS-B send handoff completion message to 3G_MSC-A, notice 3G_MSC-A, the user terminal handover success that request is switched;
Step 10,3G_MSC-A issue release command (Iu-Release-Command) and give RNS-A, notify it to discharge the Radio Resource that original conversation takies;
After step 11, RNS-A release Radio Resource are finished, return the resource Release complete to 3G_MSC-A.
So far, complete successfully once handoff procedure from the UMTS system of 3G to the gsm system of 2G.
When Fig. 2 was not the subordinate base station of this exchange for target BS, the switching flow figure from the UMTS system to gsm system comprised following idiographic flow:
RNS RNS-A under step 1, the user terminal reports reconfiguration request (Iu-Relocation-Required) by the Iu interface, requires 3G_MSC-A to switch;
After step 2,3G_MSC-A receive the reconfiguration request that RNS-A reports, in this reconfiguration request message, carry the RFC of travelling carriage; The RFC of described travelling carriage is set to the RFC that Target cell BSC is supported.Concrete method to set up is identical with method to set up in the intra-office switching flow.
3G_MSC-A produces 2G handoff request message (A-Handover-Request) according to reconfiguration request, carries the RFC that Target cell BSC or RNC are supported in this message; And on E interface, this handoff request message is packed, generate the preparation handoff request message (MAP-Prep-Handover req.) of a MAP form, send to the affiliated moving exchanging center MSC-B of target BS;
After step 3, MSC-B receive MAP-Prep-Handover req. message,,, be IAM (initial address message) and prepare so that set up 3G MSC-A to the speech channel between the MSC-B to Visited Location Registor VLR-B application Handover Number;
Step 4, MSC-B send handoff request message (A-Handover-Request) and give target BS BSS-B, require its user (UE/MS) who is request is switched to prepare Radio Resource;
Step 5, target BS S-B return acknowledge message (A-Handover-Request-ACK) to 3G_MSC-A after finishing the Radio Resource preparation;
Step 6, Visited Location Registor VLR-B send Handover Number report request (MAP-Send-Handover-Number-Report req.) to MSC-B, after MSC-B receives the Handover Number and A-Handover-Request-ACK message that VLR-B distributes, construct one together and prepare switching response message (MAP-Prep-Handover resp.);
Step 7, MSC-B are by MAP-Prep-Handover resp. message informing 3G_MSC-A, all set Radio Resource and Handover Number;
Step 8,3G_MSC-A analyze the Handover Number that MSC-B returns, and set up two speech channels between MSC, send initial address message (IAM) and give MSC-B;
Step 9, MSC-B send Handover Number release message (MAP-Send-Handover-Number-Report resp.) for Visited Location Registor VLR-B, discharge the Handover Number that application distributes, and use when asking to switch for other users;
Step 10, MSC-B go back to the address to 3G_MSC-A and finish message, show that two speech channels between MSC have finished foundation;
Step 11,3G_MSC-A issue reprovision order (Iu-Relocation-Command) to RNS-A; Require user terminal to be linked on the target BS S-B from source RNS-A;
Step 12, user terminal are after eating dishes without rice or wine to report switching to insert message, and BSS-B sends switching detection message (A-Handover-Detect) to MSC-B, and notice MSC-B has detected user terminal and inserted;
Step 13, MSC-B give 3G_MSC-A the A-Handover-Detect forwards by inserting processing signaling (MAP-Process-Access-Signal Req.), notice 3G_MSC-A, and user terminal is prepared from the 2G network insertion;
After step 14, user terminal inserted the 2G network, BSS-B sent handoff completion message (A-Handover-Complete) to MSC-B, and notice MSC-B user terminal successfully inserts;
Step 15, MSC-B give 3G_MSC-A the A-Handover-Complete forwards by sending end signaling (MAP-Send-End-Signal Req.), notice 3G_MSC-A, and user terminal has successfully inserted the 2G network;
Step 16,3G_MSC-A issue release command (Iu-Release-Command) and give RNS-A, notify it to discharge the Radio Resource that original conversation takies;
Step 17, RNS-A report Release complete (Iu-Release-Complete), and the Radio Resource that the original conversation of notice 3G_MSC-A takies is released;
Step 18, MSC-B notify 3G_MSC-A to switch on trunk interface and finish (ANSWER message), to keep the complete of relaying signaling with front ACM;
When step 19, end of calling, 3G_MSC-A is to the release (RELEASE message) of MSC-B notice interoffice speech channel;
Step 20,3G_MSC-A send to MSC-B and finish signaling response message (MAP-Send-End-Signal resp.), and notice MSC-B discharges the Radio Resource of application when switching.
By step 1-20 shown in Figure 2, finish the handoff procedure of user terminal from the UMTS system of 3G to the gsm system of 2G.
In above-mentioned Fig. 1 and Fig. 2 flow process, be to realize that with mobile switching centre (MSC)/mobile swap server (MSCServer) RFC that comprises in the cell ID is adapted for example.According to identical transformation rule, the network entity of specific implementation conversion can be radio network controller (RNC) or target mobile switching centre (2GMSC).
Should be noted that, because whether check RFC and its RFC that supports of travelling carriage mates at target BS C/RNC place, therefore, any link that can be before this is transformed to the RFC that target BS C/RNC is supported with the RFC of travelling carriage, and the 3G travelling carriage is switched in the destinations traffic system smoothly; Perhaps cancellation also can make the 3G travelling carriage switch to smoothly in the destinations traffic system to the inspection of RFC in target BS C/RNC.
According to the present invention, when the 3G travelling carriage switched, the RFC that can dispose neatly the 3G travelling carriage was configured to the RFC that BSC or RNC supported in the goal systems, therefore, the 3G travelling carriage was freely switched between 2G and 3G system.Especially at the 3G networking initial stage,, make the 3G travelling carriage can make full use of the 2G Internet resources, thereby can reduce the drop rate of 3G travelling carriage when conversation, improved the speech quality of 3G travelling carriage because its covering is extensive inadequately.
Though described the present invention by embodiment, those of ordinary skills know, without departing from the spirit and substance in the present invention, just can make the present invention that many distortion and variation are arranged, and scope of the present invention is limited to the appended claims.
Claims (4)
1, the changing method between a kind of system is characterized in that, when third generation travelling carriage from the sources traffic system when the destinations traffic system is switched, described changing method comprises:
A, RF capabilities in mobile switching centre's handoff request message of the equipment of sources traffic system or destinations traffic system is set to the RF capabilities that the equipment of destinations traffic system is supported, described sources traffic system is third generation communication system/second generation communication system, described destinations traffic system is second generation communication system/third generation communication system, wherein, the equipment of described sources traffic system comprises Mobile Switching Center Server/mobile switching centre or radio network controller, and the equipment of described destinations traffic system comprises base station controller or radio network controller;
The equipment of B, sources traffic system sends handoff request message to the equipment of destinations traffic system, and third generation travelling carriage is switched to the destinations traffic system by the sources traffic system.
2, the changing method between system according to claim 1, it is characterized in that, be provided with tables of data in the mobile switching centre of the equipment of sources traffic system or destinations traffic system, this tables of data comprises the base station controller of each sub-district or the RF capabilities scope that radio network controller is supported.
3, the changing method between system according to claim 2 is characterized in that, before the described steps A, further comprises:
The equipment of A1, sources traffic system obtains Target Cell Identifier;
The RF capabilities that the mobile switching centre of the equipment of A2, sources traffic system or destinations traffic system supports by the base station controller of tables of data acquisition Target cell according to Target Cell Identifier.
4, the changing method between system according to claim 3, it is characterized in that described steps A 2 also comprises: the RF capabilities that the mobile switching centre of the equipment of sources traffic system or destinations traffic system supports by the radio network controller of tables of data acquisition Target cell according to Target Cell Identifier.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100828018A CN100479588C (en) | 2005-07-08 | 2005-07-08 | Method for switching over between systems |
| EP06753123A EP1903817B1 (en) | 2005-07-08 | 2006-07-07 | Method of inter-system handover |
| PCT/CN2006/001609 WO2007006217A1 (en) | 2005-07-08 | 2006-07-07 | Method of inter-system handover |
| AT06753123T ATE510432T1 (en) | 2005-07-08 | 2006-07-07 | METHOD FOR HANDOVER BETWEEN SYSTEMS |
| US11/969,004 US8229438B2 (en) | 2005-07-08 | 2008-01-03 | Method for inter-system handover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100828018A CN100479588C (en) | 2005-07-08 | 2005-07-08 | Method for switching over between systems |
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|---|---|
| CN1893721A CN1893721A (en) | 2007-01-10 |
| CN100479588C true CN100479588C (en) | 2009-04-15 |
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| CNB2005100828018A Expired - Fee Related CN100479588C (en) | 2005-07-08 | 2005-07-08 | Method for switching over between systems |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8229438B2 (en) | 2005-07-08 | 2012-07-24 | Huawei Technologies Co., Ltd. | Method for inter-system handover |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101330753B (en) | 2007-06-22 | 2014-07-09 | 华为技术有限公司 | Method for establishing and erasuring resource as well as network appliance |
| CN102355705B (en) | 2008-01-30 | 2014-04-30 | 华为技术有限公司 | ISR (idle-mode signaling reduction) method and system |
| CN101730084B (en) * | 2008-03-19 | 2013-11-06 | 华为技术有限公司 | Method for saving signalling and system thereof |
| CN101282582B (en) * | 2008-05-16 | 2011-11-30 | 中兴通讯股份有限公司 | Switch method straddling wireless access technique |
| WO2010127494A1 (en) * | 2009-05-07 | 2010-11-11 | 华为技术有限公司 | Method and apparatus for indicating neighbor cell information of different system |
| CN101594656B (en) * | 2009-07-01 | 2011-08-10 | 华为技术有限公司 | Inter-system switchover processing method, system and device |
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2005
- 2005-07-08 CN CNB2005100828018A patent/CN100479588C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8229438B2 (en) | 2005-07-08 | 2012-07-24 | Huawei Technologies Co., Ltd. | Method for inter-system handover |
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| CN1893721A (en) | 2007-01-10 |
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