CN1949922A - Judging method of trigger isosystem network switching - Google Patents
Judging method of trigger isosystem network switching Download PDFInfo
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- CN1949922A CN1949922A CNA2005101129557A CN200510112955A CN1949922A CN 1949922 A CN1949922 A CN 1949922A CN A2005101129557 A CNA2005101129557 A CN A2005101129557A CN 200510112955 A CN200510112955 A CN 200510112955A CN 1949922 A CN1949922 A CN 1949922A
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Abstract
The invention discloses a detemining method of triggering different- system network switching, comprising the steps of: A) multimode terminal measures pilot strength of the current cell in the current network and determining whether the measured pilot strength is lower than switching removal threshold T_DROP: if yes, returning to the step A; otherwise deleting the current cell from an activation set and executing step B; B) the multimode terminal determines whether the activation set and a candidate set are empty: if yes, executing step C; if both of them are not empty, returning to the step A; C) triggering different-system network switching. And it can accurately determine whether the terminal is on the network edge: if yes, it can in time trigger different-system switching.
Description
Technical field
The present invention relates to the handoff technique in the radio communication, be meant a kind of decision method that isosystem network switches that triggers especially.
Background technology
At present, the network that same overlay area is existed multiple standard.The network coverage of different systems can be identical, also can be different, and the network of the standard that has covers comprehensively, and the network of the standard that has is that focus covers.Multimode terminal can be operated under the network of one or more standards.For example, the dual-mode terminal (MS/AT) of CDMA20001X system and high-speed grouped data network (HRPD) system both can be operated under the CDMA20001X network, also can be operated in the HRPD system.
In the prior art, network is broadcasted the network coverage whether other standards are arranged in its overlay area by the mode of indication, if having, then terminal need be between two or more networks compounding practice; If no, then terminal only obtains service under the network coverage of current standard.Wherein, terminal needs to consider the problem switched between two or more networks during compounding practice, further needs to consider the problem of switching condition when considering to switch.
Generally dual-mode terminal is switched between the network of two kinds of different systems and be called the isosystem network switching.Because the frequency difference that each network uses, the switching of isosystem network need be carried out direct-cut operation, and the cutting off rate of direct-cut operation is with respect to the soft handover height.
For the network that has two kinds of standards,, a kind of network A of standard not exclusively overlaps if covering with the network B of another kind of standard.When dual-mode terminal is operated in the network B, along with moving of dual-mode terminal, when moving to the covering edge of this network B, network B can not be more well for the user provides service, and at this moment this dual-mode terminal need switch in the network A that same services can be provided and just can proceed business; In addition, along with moving of dual-mode terminal, though dual-mode terminal is not in current network covering edge sometimes, the situation that also has network service quality to descend if at this moment switch in the network A, then can increase probability of call.Therefore, in these cases, on the one hand, when dual-mode terminal is in the current service network edge, needs to trigger isosystem network and switch, make this dual-mode terminal switch to the network of other standards; On the other hand, need judge exactly whether dual-mode terminal is in network edge, prevents from frequently to trigger the increase of the cutting off rate that switching caused between isosystem network.
In the prior art, when multimode terminal was operated in the network of multiple standard, whether the simple indication whether other standard network coverages are arranged can not switch to the judgment condition of isosystem network as terminal.On the one hand, the simple indication whether other standard network coverages are arranged can not tell whether terminal has been in the edge of current network again, therefore can not trigger the switching of isosystem network.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of decision method that isosystem network switches that triggers, and makes end when network edge, can in time trigger isosystem network and switch.
In order to achieve the above object, the invention provides a kind of decision method that isosystem network switches that triggers, this method may further comprise the steps:
A) multimode terminal is measured the pilot frequency intensity of current area in the current network, judges whether measured pilot frequency intensity is lower than switching and removes thresholding, if then turn back to steps A; Otherwise, current area is deleted execution in step B afterwards from Active Set;
B) multimode terminal judges whether Active Set and Candidate Set are empty, if two set all are sky, then execution in step C; If two set not all are empty, then turn back to steps A;
C) switching of triggering isosystem network.
Wherein, steps A is described judges whether pilot frequency intensity is lower than the step of switching the removal thresholding and comprises: multimode terminal judges whether the pilot frequency intensity of current area is lower than switching in switching timer always and removes thresholding in the time.
Wherein, steps A is described further comprises when current area is deleted from Active Set: multimode terminal reports the pilot measurement result of current area to the base station.
Wherein, step B is described judges whether Active Set and Candidate Set are that empty step comprises: multimode terminal judges at first whether Active Set is empty, if judge then whether Candidate Set is empty; Otherwise, turn back to steps A.
Wherein, the step of the switching of the described triggering isosystem network of step C comprises:
Multiple mode terminal searching is also measured after the pilot tone of isosystem network, selects available pilot tone, and the sub-district of the selected pilot tone of correspondence is joined the Neighboring Cell List of multimode terminal inside, reports the pilot measurement result to current network then;
The pilot measurement result that current network reports according to multimode terminal triggers the switching of isosystem network.
Wherein, described available pilot tone is the pilot tone that pilot frequency intensity reaches certain threshold value.
The invention provides a kind of decision method that switches to isosystem network, when the current area of current network can not satisfy QoS, multimode terminal can judge initiatively whether Active Set and Candidate Set are empty, if two set all are empty, think that multimode terminal is in network edge, then trigger the switching of isosystem network,, guarantee professional not interrupting so that multimode terminal can in time switch to isosystem network; If at least one set is not empty in two set, then do not trigger the switching of isosystem network, the call drop that the direct-cut operation of minimizing isosystem network brings.
Description of drawings
Figure 1 shows that and trigger the flow chart that isosystem network switches among the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, lift specific embodiment below, the present invention is further detailed explanation.
With CDMA20001X network and HRPD network and save as example, wherein, the CDMA20001X network is that the whole network covers, and the HRPD network is that focus covers.Dual-mode terminal MS/AT both can be operated in the CDMA20001X network, also can be operated in the HRPD network.
Suppose that dual-mode terminal MS/AT is current just in the HRPD network, and provide the Packet Service service for this MS/AT by the HRPD network.Dual-mode terminal MS/AT moves to HRPD network coverage edge in business procedure, or when HRPD network cell intersection moves, the current area pilot frequency intensity descends, the present invention is by judging whether decision switches in the CDMA20001X network, flow process as shown in Figure 1, and it is as follows to describe its step in detail:
Step 101: the dual-mode terminal MS/AT that is in service condition measures the current pilot frequency intensity that the activation sub-district of service is being provided.
Step 102: judge whether measured pilot frequency intensity is lower than switching and removes thresholding T_DROP, if then execution in step 103; Otherwise, turn back to step 101.Wherein, it is the threshold value that sets in advance according to concrete network that thresholding T_DROP is removed in described switching, judges whether that according to comparing pilot frequency intensity and this threshold value needs switch in the prior art.
Step 103: start switching timer T_TDROP.
Step 104: in the switching timer T_TDROP time, measure the pilot frequency intensity of current activation sub-district, and judge whether pilot frequency intensity is lower than switching removal thresholding T_DROP in the switching timer T_TDROP time always, if then execution in step 105; Otherwise, turn back to step 101.
Step 105: dual-mode terminal MS/AT sends this pilot measurement message to the base station, and the pilot tone of this sub-district is deleted from Active Set.
Step 106: whether be empty in the present Active Set of dual-mode terminal MS/AT active inquiry, if, owing to there is not in the current Active Set other sub-district to exist, think then in the HRPD network that except current area not for the sub-district of service is provided, terminal needs further execution in step 107; Otherwise, think that dual-mode terminal MS/AT is not in the HRPD network edge, and also have other sub-district to provide service for this dual-mode terminal MS/AT, do not do abnormality processing, turn back to step 101.
Step 107: whether dual-mode terminal MS/AT inquires about in the present Candidate Set is empty, if, owing to there is not other sub-district to exist in the current Candidate Set, then thinking does not have the sub-district to provide service for dual-mode terminal MS/AT in the HRPD network, determine that this dual-mode terminal MS/AT is in HRPD network of network edge, in order to prevent the interruption of dual-mode terminal MS/AT business, need further execution in step 108; Otherwise, think that dual-mode terminal MS/AT is not in the HRPD network edge, do not do abnormality processing, turn back to step 101.
Step 108: dual-mode terminal MS/AT initiatively initiates pilot search and measurement to the CDMA20001X network according to the bimodulus tenability of self, selects to reach the available pilot signal of certain handoff threshold.Wherein, concrete handoff threshold value determines to belong to prior art.Dual-mode terminal MS/AT measures after the pilot frequency intensity of CDMA20001X network, compares with this threshold value, if pilot frequency intensity surpasses this threshold value, determines that then measured pilot tone is available.
Step 109: dual-mode terminal MS/AT will be to the sub-district of CDMA20001X network that should the pilot signal neighbor cell as current HRPD network according to selected pilot signal, and joins the Neighboring Cell List of the current management of dual-mode terminal MS/AT.
Step 110: dual-mode terminal MS/AT reports the measurement report of the pilot tone of CDMA20001X network to the HRPD of work at present network side.
The measurement report that step 111:HRPD network side reports according to dual-mode terminal triggers the switching of isosystem network, so that dual-mode terminal switches in the CDMA20001X network, keeps professional not interrupting.
Pilot frequency intensity described in the above-mentioned steps can be used signal to noise ratio (E
C/ I
O) expression, the judgement thresholding also can be used this parametric representation.
Sub-district in the described Active Set is for providing the sub-district of service to user terminal; Sub-district in the described Candidate Set has the ability that service can be provided to user terminal, but does not provide service to user terminal at present.The additions and deletions of sub-district also are according to the user terminal measurement pilot quality in the Candidate Set, if pilot frequency intensity surpasses some thresholdings, then add in the Candidate Set after the base station reports; If described according to step 101 to 104, pilot frequency intensity was lower than to switch in the switching timer T_TDROP time always removes thresholding T_DROP, then deletes this sub-district after the base station reports from Candidate Set.
In sum, the general thought that triggers the method for isosystem network switching is: the multimode terminal that can work in the network of multiple standard is current to be in service condition in a kind of network of standard, if the signal quality of current network descends, and still be lower than certain thresholding within a certain period of time, then after the base station reports and delete this sub-district from Active Set, multimode terminal judges initiatively whether Active Set and Candidate Set are empty, if two set all are empty, then trigger the switching of isosystem network.
For GSM network and Wideband Code Division Multiple Access (WCDMA) (WCDMA) network and the situation of depositing, can use method judgement provided by the invention to switch to the condition of isosystem network equally, that is: at the dual-mode terminal of GSM network and WCDMA network work, because the WCDMA network coverage is also not comprehensive, dual-mode terminal just carries out in the business procedure in the WCDMA network, dual-mode terminal is initiatively carried out step provided by the invention, in time triggers isosystem network and switches, and guarantees professional not interrupting.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1, a kind of decision method that triggers the isosystem network switching is characterized in that this method may further comprise the steps:
A) multimode terminal is measured the pilot frequency intensity of current area in the current network, judges whether measured pilot frequency intensity is lower than switching and removes thresholding, if then turn back to steps A; Otherwise, current area is deleted execution in step B afterwards from Active Set;
B) multimode terminal judges whether Active Set and Candidate Set are empty, if two set all are sky, then execution in step C; If two set not all are empty, then turn back to steps A;
C) switching of triggering isosystem network.
2, method according to claim 1, it is characterized in that steps A is described judges whether pilot frequency intensity is lower than the step of switching the removal thresholding and comprises: multimode terminal judges whether the pilot frequency intensity of current area is lower than switching in switching timer always and removes thresholding in the time.
3, method according to claim 1 is characterized in that, steps A is described further to be comprised when current area is deleted from Active Set: multimode terminal reports the pilot measurement result of current area to the base station.
4, method according to claim 1 is characterized in that, step B is described to judge whether Active Set and Candidate Set are that empty step comprises: multimode terminal judges at first whether Active Set is empty, if judge then whether Candidate Set is empty; Otherwise, turn back to steps A.
5, method according to claim 1 is characterized in that, the step of the switching of the described triggering isosystem network of step C comprises:
Multiple mode terminal searching is also measured after the pilot tone of isosystem network, selects available pilot tone, and the sub-district of the selected pilot tone of correspondence is joined the Neighboring Cell List of multimode terminal inside, reports the pilot measurement result to current network then;
The pilot measurement result that current network reports according to multimode terminal triggers the switching of isosystem network.
6, method according to claim 5 is characterized in that, described available pilot tone is the pilot tone that pilot frequency intensity reaches certain threshold value.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2005101129557A CN1949922A (en) | 2005-10-14 | 2005-10-14 | Judging method of trigger isosystem network switching |
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| CNA2005101129557A CN1949922A (en) | 2005-10-14 | 2005-10-14 | Judging method of trigger isosystem network switching |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101897213A (en) * | 2007-10-12 | 2010-11-24 | 高通股份有限公司 | Identification of target node for wireless handoff |
| CN102083160A (en) * | 2009-11-30 | 2011-06-01 | 中国移动通信集团北京有限公司 | Method, terminal and network element for cell reselection according to cell service features |
| CN102083156A (en) * | 2009-11-30 | 2011-06-01 | 中国移动通信集团北京有限公司 | District reselection method among wireless access technology and wireless communication terminal |
| CN102413531A (en) * | 2011-11-30 | 2012-04-11 | 上海顶竹通讯技术有限公司 | Network switching device and method of multimode terminal |
| CN102547881A (en) * | 2012-01-20 | 2012-07-04 | 中兴通讯股份有限公司 | User device control method, user device and network side device |
| CN102883389A (en) * | 2012-10-19 | 2013-01-16 | 电子科技大学 | Connection switching method of multimode multi-standby handheld mobile terminal service under connection state |
-
2005
- 2005-10-14 CN CNA2005101129557A patent/CN1949922A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101897213A (en) * | 2007-10-12 | 2010-11-24 | 高通股份有限公司 | Identification of target node for wireless handoff |
| US9173148B2 (en) | 2007-10-12 | 2015-10-27 | Qualcomm Incorporated | Identification of target node for wireless handoff |
| CN101897213B (en) * | 2007-10-12 | 2015-11-25 | 高通股份有限公司 | To the identification of the destination node for wireless switching |
| CN102083160A (en) * | 2009-11-30 | 2011-06-01 | 中国移动通信集团北京有限公司 | Method, terminal and network element for cell reselection according to cell service features |
| CN102083156A (en) * | 2009-11-30 | 2011-06-01 | 中国移动通信集团北京有限公司 | District reselection method among wireless access technology and wireless communication terminal |
| CN102083160B (en) * | 2009-11-30 | 2014-06-11 | 中国移动通信集团北京有限公司 | Method, terminal and network element for cell reselection according to cell service features |
| CN102413531A (en) * | 2011-11-30 | 2012-04-11 | 上海顶竹通讯技术有限公司 | Network switching device and method of multimode terminal |
| CN102413531B (en) * | 2011-11-30 | 2014-03-26 | 上海顶竹通讯技术有限公司 | Network switching device and method of multimode terminal |
| CN102547881A (en) * | 2012-01-20 | 2012-07-04 | 中兴通讯股份有限公司 | User device control method, user device and network side device |
| CN102547881B (en) * | 2012-01-20 | 2018-08-31 | 中兴通讯股份有限公司 | A kind of customer equipment controlling method, user equipment and network side equipment |
| CN102883389A (en) * | 2012-10-19 | 2013-01-16 | 电子科技大学 | Connection switching method of multimode multi-standby handheld mobile terminal service under connection state |
| CN102883389B (en) * | 2012-10-19 | 2015-06-17 | 电子科技大学 | Connection switching method of multimode multi-standby handheld mobile terminal service under connection state |
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