CN1756430A - Method for solving terminal repeating switch - Google Patents

Method for solving terminal repeating switch Download PDF

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Publication number
CN1756430A
CN1756430A CN 200410085412 CN200410085412A CN1756430A CN 1756430 A CN1756430 A CN 1756430A CN 200410085412 CN200410085412 CN 200410085412 CN 200410085412 A CN200410085412 A CN 200410085412A CN 1756430 A CN1756430 A CN 1756430A
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China
Prior art keywords
terminal
switch
network side
timer
handoff request
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CN 200410085412
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Chinese (zh)
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CN100428841C (en
Inventor
唐心红
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CNB2004100854126A priority Critical patent/CN100428841C/en
Publication of CN1756430A publication Critical patent/CN1756430A/en
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Publication of CN100428841C publication Critical patent/CN100428841C/en
Expired - Fee Related legal-status Critical Current
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Abstract

The invention discloses a method by setting timer on local network side to solve terminal repeating switch, which comprises: A. terminal sends switch requirement to local network; B. network side starts timer for timing, and decides whether there is another switch requirement when timing ends; if yes, turns to step C; or else, continues the calling without switch; C. network side switches the terminal to continue calling on switched zone. This invention can avoid frequent switch when calling signal drifts or encounters conflict from other signal, and decreases local network resource.

Description

A kind of method that solves the terminal repeating switching
Technical field
The present invention relates to terminal handoff technique in the wireless local net, particularly a kind of method that solves the terminal repeating switching.
Background technology
A lot of wireless local network operation business are arranged at present, it has the right of operation wireless local net, but can not run mobile network, in the relatively stricter place of control, require the random zone of terminal can not surpass sub-district, single base station scope or the many base stations scope that this wireless local network operation business is administered, going beyond the scope to provide the call business service to terminal.This situation is referred to as the roaming restriction of terminal.
Exist a lot of methods realizations to judge now based on the roaming restriction of the terminal of sub-district, single base station or many base stations.
Fig. 1 is wherein a kind of process flow diagram of realizing that restriction is judged to terminal roaming of prior art, the roaming restricted area tabulation that will be stored in the contracting terminal of attaching position register (HLR) in advance is handed down to center (MSC) in the mobile exchange of administering this terminal, and be stored in the Visited Location Registor (VLR) of this MSC, its concrete steps are:
Step 100, make a call or called out or when switching, the MSC of base station controller (BSC) under this terminal of the current region of administration terminal reports the current zone list that call service will be provided to the user in terminal;
Step 101, the MSC that receives this zone list judge the current zone list that will provide call service to the user whether among the roaming restricted area tabulation in this terminal of the storage of VLR in advance, if, execution in step 102; Otherwise, execution in step 103;
Step 102, MSC handle the business that this terminal will be carried out, and make this terminal realize the business that will carry out, make a call or when called as: this terminal, then set up to call out to connect, and realize calling out or being called out, and when this terminal will be switched, then switch;
Step 103, MSC send the message of roaming restriction by the BSC of the current region of administration terminal to this terminal, refuse the business that this terminal is initiated.
Process according to Fig. 1 just can have been judged the roaming restriction of terminal.But the environmental change of terminal in moving process is very fast, especially terminal is in the overlay region that is in two base stations, as when being in base station A and base station B, current probably terminal is in the overlay area of base station A, along with the accidental conflict that floats to base station B or be subjected to base station B call signal of signal, cause terminal to switch to base station B by base station A, then along with base station A is switched back in the recovery of base station A call signal again, the roaming restriction that all must be accompanied by terminal of switching is repeatedly like this judged, make the roaming restriction deterministic process of terminal is carried out repeatedly in the zone of base station A and base station B covering respectively at short notice, this is very difficult and carries out repeatedly the resource of having wasted the wireless local net is judged in the roaming restriction of terminal.
As can be seen from the above analysis, when terminal is in the overlay region of a plurality of base stations covering, can frequently switch, judge, resource very difficult and that wasted the wireless local net be judged in the roaming restriction of terminal thereby make thereby frequently roam restriction.Further, because it is because mobile or signal drift or the switching that causes when being subjected to the conflict of other base station call signals that prior art can't be distinguished when terminal is in the overlay region that a plurality of base stations cover, such situation may appear: when the call signal of terminal floats to non-signing-contract field by signing-contract field, but switch back signing-contract field in a short period of time again, can cause call clearing because switching follows roaming to limit judgement this moment when terminal switches to non-signing-contract field.
Summary of the invention
In view of this, main purpose of the present invention is to provide on the one hand a kind of method that terminal repeating switches that solves, this method can realize when call signal drift or when being subjected to the conflict of other base station call signals terminal frequently do not switch, follow the roaming restriction to terminal of switching to judge that number of times reduces, and saves the resource of wireless local net thereby make.Further, realize when call signal when signing-contract field floats to non-signing-contract field, solve owing to switch and follow roaming to limit the call clearing that judgement can cause.
According to above-mentioned purpose, technical scheme of the present invention is achieved in that
A kind of method that solves the terminal repeating switching is provided with timer at wireless local net network side, and this method also comprises:
A, terminal are initiated handoff request to the network side of local network;
The network side of B, local network starts timer regularly, judges at timer to the handoff request once more of whether receiving that constantly this terminal is initiated, if change step C over to; Otherwise the network side of local network does not switch this terminal, and the calling of terminal is proceeded;
The network side of C, local network switches this terminal according to handoff request once more, and this terminal continues to call out to the back, zone that will switch.
Described timer is arranged in the mobile switching centre of wireless local net network side.
The described timer of the step B time regularly sets in advance according to configuring condition, the call signal drift of current local wireless network and time limit of conflict of being subjected to the base station call signal of non-current region.
The described handoff request of steps A carries the area information of all sub-districts of the current activation of terminal;
Before step B, this method also comprises: the wireless local net network side that receives this request judges whether the area information that this request is carried is included among the roaming restricted area tabulation of this terminal of storing in advance, if, this terminal is switched in the sub-district of its request, this terminal continues to call out to the back, zone that will switch; Otherwise, execution in step B.
The described handoff request once more of step B carries the area information that terminal activates all sub-districts once more;
Before step C, this method also comprises: receive this wireless local net network side of asking once more and judge whether this area information of asking once more to carry is included among the roaming restricted area tabulation of this terminal of storing in advance, if, this terminal is switched in the sub-district of its request, this terminal continues to call out to the back, zone that will switch; Otherwise, this terminal is torn open call treatment.
From such scheme as can be seen, the present invention is provided with timer at network side, receiving to be owing to the drift of call signal or when being subjected to handoff request that the conflict of other base station call signals initiates first, network side is not handled, if but whether judgement receives handoff request once more in the time regularly, switch accordingly again.Therefore, method provided by the invention can realize that terminal is not frequently switched when call signal is drifted about, and follows the roaming restriction to terminal of switching to judge that number of times reduces, and saves the resource of wireless local net thereby make.Further, the present invention combines with such scheme with to the roaming of terminal restriction deterministic process, realize when call signal when signing-contract field floats to non-signing-contract field, solve owing to switch and follow roaming to limit the call clearing that judgement can cause.
Description of drawings
Fig. 1 is wherein a kind of process flow diagram of realizing that restriction is judged to terminal roaming of prior art.
Fig. 2 realizes the method flow diagram that terminal is not frequently switched for the present invention.
Fig. 3 for the present invention realize when call signal when signing-contract field floats to non-signing-contract field, solve owing to switch the method flow diagram of following roaming to limit the call clearing that judgement can cause.
Fig. 4 for the present invention realize when call signal when signing-contract field floats to non-signing-contract field, solve owing to switch the embodiment schematic diagram of following roaming to limit the call clearing that judgement can cause.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, by the following examples and with reference to accompanying drawing, the present invention is further elaborated.
Core concept of the present invention is: the wireless local net network side in the administration terminal is provided with timer in advance, when initiating handoff request, terminal starts timer, judgement is before timer expiry, whether terminal initiates handoff request once more, if, switch according to the handoff request that sends once more, terminal continues to call out after switching to the zone that will switch again; Otherwise, not switch, the calling of terminal is proceeded.
The present invention must be provided with a timer at the wireless local net network side of administration terminal, and this timer can be arranged among the MSC of the wireless local net network side of administering terminal.
Fig. 2 realizes the method flow diagram that terminal is not frequently switched for the present invention, and its concrete steps are:
Step 200, terminal are initiated handoff request by the BSC under the current region to the MSC of administration terminal;
When terminal moves to another sub-district of other BSC administrations from this sub-district, will initiate handoff request to MSC by the BSC under the current region, the handoff request of another cell area information is carried in this request;
When the overlapping region of terminal, can initiate the handoff request of having carried two different districts area informations to MSC at two different B different districts that SC administers;
After step 201, MSC receive this handoff request, start timer regularly;
Length of timer MSC can be pre-configured, also can revise configuration according to actual conditions, the value source that this concrete timer duration neither one is determined;
But generally, the time regularly can set in advance according to configuring condition, the call signal drift of current local wireless network and the time limit that is subjected to the conflict of other base station call signals;
Step 202, MSC at timer to the handoff request once more that judges whether constantly to receive that this terminal is initiated, if change step 203 over to; Otherwise, change step 204 over to;
If terminal network side when initiating to switch does not switch or switch unsuccessful words to it, terminal can be initiated to switch once more;
Step 203, MSC are switched this terminal according to handoff request once more, and this terminal continues to call out behind the zone that will switch again;
Step 204, MSC do not switch this terminal, and the calling of terminal is proceeded.
From method that Fig. 2 narrated as can be seen, this method is provided with timer at the network side of wireless local net, receiving to be owing to the drift of call signal or when being subjected to handoff request that the conflict of other base station call signals initiates first, network side is not handled, if but whether judgement receives handoff request once more in the time regularly, handle accordingly again.Therefore, method provided by the invention can realize that terminal is not frequently switched when call signal is drifted about, and follows the roaming restriction to terminal of switching to judge that number of times reduces, and saves the resource of wireless local net thereby make.
Further, the present invention can also combine with method that Fig. 2 narrated with to the roaming restriction deterministic process of terminal, realize when call signal when signing-contract field floats to non-signing-contract field, solve owing to switch and follow roaming to limit the call clearing that judgement can cause.
Fig. 3 for the present invention realize when call signal when signing-contract field floats to non-signing-contract field, solve owing to switch the method flow diagram of following roaming to limit the call clearing that judgement can cause, its concrete steps are:
Step 300, terminal are initiated handoff request by the BSC under the current region to the MSC of administration terminal, the All Ranges information of the current activation of this request carried terminal;
When terminal moves to another sub-district of other BSC administrations from this sub-district, will initiate handoff request to MSC by the BSC under the current region, the area information of another sub-district is carried in this request;
When the overlapping region of terminal, can initiate the handoff request of having carried two different districts area informations to MSC at two different B different districts that SC administers;
Step 301, the MSC that receives this request judge whether area information that this request is carried is included in advance among the roaming restricted area tabulation of this terminal of the storage of VLR, if, execution in step 302; Otherwise, execution in step 303;
Step 302, MSC switch this terminal according to handoff request, this terminal are switched in the sub-district of its request, and this terminal continues to call out to the back, zone that will switch;
Step 303, MSC start timer regularly;
Time regularly can set in advance according to configuring condition, the call signal drift of current local wireless network and the time limit that is subjected to the conflict of other base station call signals;
To the handoff request once more that judges whether constantly to receive that this terminal is initiated, this handoff request has been carried the All Ranges information that terminal activates once more, if change step 305 at timer for step 304, MSC; Otherwise, change step 308 over to;
Step 305, receive this once more the MSC of handoff request judge whether this is included in advance among the roaming restricted area tabulation of this terminal of the storage of VLR in handoff request zone of carrying once more, if, execution in step 306; Otherwise, execution in step 307;
Step 306, MSC are switched this terminal according to handoff request once more, this terminal are switched in the sub-district of its request, and this terminal continues to call out to the back, zone that will switch;
Step 307, MSC are switched this terminal according to handoff request once more, because this terminal will ask the zone of switching not among the roaming restricted area tabulation of this terminal of VLR storage, handle so MSC carries out dismantling call to this terminal;
Step 308, MSC do not switch this terminal, and the calling of terminal is proceeded.
From the narration of Fig. 3 as can be seen, when terminal is initiated handoff request and this handoff request and this terminal will be switched to its non-signing-contract field, the network side of wireless local net is not carried out this processing, but timer is set regularly, if judge in the time regularly and whether receive handoff request once more, handle accordingly again: if handoff request still will switch to terminal non-signing-contract field once more, remove the processing of current calling again, otherwise, switch to signing-contract field, keep the continuation of calling out.Therefore, method provided by the invention when call signal when signing-contract field floats to non-signing-contract field, solve owing to switch the call clearing of following roaming restriction judgement to cause.
Be worth explanation any be, though the handoff request first that the network side of wireless local net does not have processing terminal to initiate, but terminal also is in the state that continues of calling out, this be because: terminal is when initiating first handoff request, it can not directly stride into another sub-district from a sub-district, but earlier in current calling sub-district with want the overlapping region of switching cell again to the sub-district that will switch; When terminal was in the overlapping region, when the call signal of terminal was carried out of short duration drift or is subjected to wanting the conflict of call signal of switching cell, terminal can also be received the signal that current area is called out.
Below lift the method for specific embodiment explanation Fig. 3 narration of the present invention.
Fig. 4 for the present invention realize when call signal when signing-contract field floats to non-signing-contract field, solve owing to switch the embodiment schematic diagram of following roaming to limit the call clearing that judgement can cause, as shown in the figure:
Suppose that terminal A is limited at the sub-district A roaming under the MSC1, terminal A can't carry out caller and called after going out sub-district A.
The present invention at first in HLR contracting terminal A limit the zone of roaming: MSC1+ sub-district A, HLR send to the roaming restricted area tabulation of this terminal among the VLR of MSC of this terminal of administration and preserve.
When terminal A is current when calling out and being in the overlay region of sub-district A and sub-district B, the call signal of terminal A drift or run into the conflict of sub-district B call signal and cause terminal A will switch to sub-district B then initiates to carry the handoff request in B zone, sub-district to MSC by the BSC under the A of sub-district.MSC judges that according to the roaming restricted area tabulation of this terminal that VLR preserves B zone in sub-district is non-signing-contract field, then starts timer regularly, is timed to constantly at timer, and there will be two kinds of situations, and the present invention handles accordingly according to both of these case:
1, be timed to constantly or then at timer, MSC receives the handoff request that switches to A that terminal A initiates, and stops timer, calls out and continues;
2, timer is regularly overtime or received the handoff request of carrying B zone, sub-district at timer again then, and does not receive the handoff request that switches to A, then removes this calling.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.

Claims (5)

1, a kind of method that solves the terminal repeating switching is characterized in that at wireless local net network side timer is set, this method also comprises:
A, terminal are initiated handoff request to the network side of local network;
The network side of B, local network starts timer regularly, judges at timer to the handoff request once more of whether receiving that constantly this terminal is initiated, if change step C over to; Otherwise the network side of local network does not switch this terminal, and the calling of terminal is proceeded;
The network side of C, local network switches this terminal according to handoff request once more, and this terminal continues to call out to the back, zone that will switch.
2, the method for claim 1 is characterized in that, described timer is arranged in the mobile switching centre of wireless local net network side.
3, the method for claim 1, it is characterized in that the described timer of the step B time regularly sets in advance according to configuring condition, the call signal drift of current local wireless network and time limit of conflict of being subjected to the base station call signal of non-current region.
4, the method for claim 1 is characterized in that, the described handoff request of steps A carries the area information of all sub-districts of the current activation of terminal;
Before step B, this method also comprises: the wireless local net network side that receives this request judges whether the area information that this request is carried is included among the roaming restricted area tabulation of this terminal of storing in advance, if, this terminal is switched in the sub-district of its request, this terminal continues to call out to the back, zone that will switch; Otherwise, execution in step B.
As claim 1 or 4 methods of being narrated, it is characterized in that 5, the described handoff request once more of step B carries the area information that terminal activates all sub-districts once more;
Before step C, this method also comprises: receive this wireless local net network side of asking once more and judge whether this area information of asking once more to carry is included among the roaming restricted area tabulation of this terminal of storing in advance, if, this terminal is switched in the sub-district of its request, this terminal continues to call out to the back, zone that will switch; Otherwise, this terminal is torn open call treatment.
CNB2004100854126A 2004-09-30 2004-09-30 Method for solving terminal repeating switch Expired - Fee Related CN100428841C (en)

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Application Number Priority Date Filing Date Title
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CN100428841C CN100428841C (en) 2008-10-22

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101179843B (en) * 2006-11-06 2010-05-19 华为技术有限公司 Packet switch method and communication appliance
CN103731807B (en) * 2013-12-17 2017-01-25 江苏省公用信息有限公司 Roaming welcome short message sending method based on LAC switching signals

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101442741B (en) * 1997-04-24 2011-04-13 株式会社Ntt都科摩 Method and system for mobile communications
KR100265855B1 (en) * 1997-07-10 2000-09-15 정선종 Method for processing handoff call in wireless communication system
JP2000354267A (en) * 1999-04-07 2000-12-19 Toshiba Corp Mobile communication terminal provided with handover request function, handover controller, handover control method and storage medium storing handover control method
EP1324540B1 (en) * 2001-12-28 2011-08-17 Fujitsu Toshiba Mobile Communications Limited Radio communication device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101179843B (en) * 2006-11-06 2010-05-19 华为技术有限公司 Packet switch method and communication appliance
CN103731807B (en) * 2013-12-17 2017-01-25 江苏省公用信息有限公司 Roaming welcome short message sending method based on LAC switching signals

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Granted publication date: 20081022

Termination date: 20120930