CN100442914C - User equipment link management method in soft switch area - Google Patents
User equipment link management method in soft switch area Download PDFInfo
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- CN100442914C CN100442914C CNB2005100274178A CN200510027417A CN100442914C CN 100442914 C CN100442914 C CN 100442914C CN B2005100274178 A CNB2005100274178 A CN B2005100274178A CN 200510027417 A CN200510027417 A CN 200510027417A CN 100442914 C CN100442914 C CN 100442914C
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Abstract
A method for managing link of user device in soft switch region includes monitoring residence time of UE in soft switch region, only reserving one link in high quality for UE if preset threshold is exceeded and high quality link is held, using the other links to carry out releasing activities intensively and labeling said UE as residence state of soft switch region, only allowing UE to restore to be normal state of soft switch when signal quality of current cell is changed to be worse at certain degree.
Description
Technical field
The present invention relates to mobile communication technology, particularly the soft hand-off in the broadband CDMA system.
Background technology
Along with being the high-tech development of sign with the communication technology and computer technology, the great variety of making rapid progress has taken place in people's life, and interpersonal information transmission is more and more closer, mode is also more and more diversified.The development of cellular mobile communication brings great convenience to the user, the three generations has been experienced in its development at present, be respectively that early eighties is with frequency division multiple access (Frequency Division Multiple Access, abbreviation " FDMA ") technology is basic first generation analog mobile communication system, the early 1990s is with time division multiple access (Time Division Multiple Access, abbreviation " TDMA ") technology is the second generation digital cellular mobile communication systems on basis, and of new generation at present moving and PCS Personal Communications System, promptly move and PCS Personal Communications System for the third generation on basis with code division multiple access (Code Division Multiple Access is called for short " CDMA ") technology.The third generation moves a focus that becomes field of telecommunications with the research and development of PCS Personal Communications System, three main world standards have been formed, Wideband Code Division Multiple Access (WCDMA) (Wideband CodeDivision Multiple Access, be called for short " WCDMA ") is exactly one of technology of wherein tool potentiality.
The WCDMA system comprises Radio Access Network (Radio Access Network is called for short " RAN ") and core network (Core Network is called for short " CN ") two large divisions.Wherein, RAN mainly comprises two category nodes: base station (NodeB) and radio network controller (Radio Network Controller is called for short " RNC ").NodeB is used for the transmitting-receiving and the bottom layer treatment of wireless signal, for example modulation, coding and decoding etc.RNC is used for the management of on-air radio resource, for example, sends Cell Broadcast CB, distributes RAB between wireless channel, allocating cell parameter, managing mobile phone and the system or the like.Each NodeB node receives the cellphone subscriber's signal in the administrative area, after treatment it is aggregated into RNC by transmission channel, RNC focuses on the information that each NodeB node transmits, and the information that will handle sends to mobile phone by these NodeB nodes.
In the WCDMA system, switching is a key technology supporting user's global roaming, and it is an important mobile management function, is that cellular system is exclusive, and it directly influences the performance of whole system.The so-called switching is exactly to move on to another sub-district from a sub-district when travelling carriage (Mobile Station is called for short " MS ") in communication process; Or, external interference descends because of causing speech quality; Or too many because of the user in the sub-district, in the time of can't guaranteeing that all users normally use, MS must be transferred to the communication service switching on the new channel, continues to keep communication.Link between former base station and the MS may be replaced by the link between new base station and the MS.Switching type has multiple mode classification, sets up situation about discharging and can be divided into according to being connected between MS and the network: More Soft Handoff, soft handover and direct-cut operation.Involved in the present invention is wherein soft hand-off.
Soft handover is meant when travelling carriage need be with a new base station communication, do not interrupt earlier and the getting in touch of former base station.And in the past system carried out all is direct-cut operation, promptly interrupt earlier and the getting in touch of former base station, in a fixed time, get in touch again with new base station.Soft handover can only carry out between the CDMA Channel of same frequency.It has played the diversity effect of Traffic Channel at the intersection of two base station overlay areas.Can significantly reduce like this owing to switch the call drop that causes.Because toward the test statistics to analogue system TDMA, 90% call drop takes place in handoff procedure on the wireless channel according to this.Realize switching and causing that probability of call reduces greatly after the soft handover, guaranteed the reliability of communication.
But just because of can not interrupt during soft handover and the getting in touch of former base station, be that synchronization is set up multilink with new base station and former base station, certainly will cause the UE that is in soft changing state to take more resources, influence power system capacity, especially the user causes significant wastage carrying out the time marquis of high speed business to system resource.And for enter long-term situation that be detained or that be in soft handover area behind the soft handover area always, it is particularly outstanding that this problem seems.
In order to address this problem, a kind of scheme commonly used is to reduce the bandwidth of the ongoing high speed business of user before entering soft changing state, recovers user's bandwidth after leaving soft changing state again according to the actual conditions of subscriber traffic request at present.
But under the long-term situation that be detained or that always be in soft handover area, above-mentioned solution negative side case can cause the user who is in above-mentioned state can't carry out high speed business for a long time after entering soft handover area.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of user equipment link management method in soft switch area, makes the UE that is trapped in for a long time in the soft handover area to carry out high speed business with less resource.
For achieving the above object, the invention provides a kind of user equipment link management method in soft switch area, comprise following steps:
A network side recording user equipment keeps the time of soft changing state, and judges whether this time exceed first thresholding that presets, and concentrates the signal quality of all links if then check the current active of this subscriber equipment;
The link of second thresholding that B judges whether to exist at least one signal quality to be better than and presets if then therefrom select a reservation, discharges in the described active set other link.
Wherein, among the described step B, selected reservation can be the best link of signal quality.
In this external described method, among the described step B, can determine the link that needs keep according to one of following factor or its combination in any:
The loading condition of the coverage of signal quality, link affiliated subdistrict and link affiliated subdistrict.
In this external described method, described step B also further comprises following substep:
In discharging described active set behind other the link, the described subscriber equipment of mark is in soft handover area and is detained state, the common frequency measurement control information of revising in the subscriber equipment is that soft handover is detained the cell measurement control information, wherein, soft handover is detained cell measurement control information indication subscriber equipment reporting measurement reports when one of meeting the following conditions:
The signal quality of current area is lower than the 3rd thresholding that presets;
The signal quality of other sub-districts is higher than the 4th thresholding, and wherein the 4th thresholding is higher than described the 3rd thresholding.
In addition, described method also comprises following steps:
For being in the subscriber equipment that soft handover area is detained state, when network side was lower than the measurement report of described the 3rd thresholding at the signal quality of receiving current area, the soft handover area of removing this subscriber equipment was detained state, recovers the common frequency measurement control information.
In this external described method, the value of described the 4th thresholding can be the fixed value that presets, or the signal quality of current area adds a fixed value that presets.
In addition, described method also comprises following steps:
For being in the subscriber equipment that soft handover area is detained state, when network side is higher than the measurement report of described the 4th thresholding at the signal quality of receiving other sub-district, trigger soft handoff procedure again, and recover the common frequency measurement control information.
In this external described method, described steps A comprises following substep:
When entering soft handoff procedure, described user equipment to report active set starts timer after upgrading and finishing message, and this length of timer is described first thresholding;
When described subscriber equipment leaves soft handover area, stop described timer;
When described timer expiry, check the signal quality of concentrated all links of current active of this subscriber equipment, the step of going forward side by side B.
By relatively finding, the main distinction of technical scheme of the present invention and prior art is, the time that UE is detained in soft handover area monitors, if surpassed predetermined thresholding and had link than good quality, then only stay a quality preferably link give this UE, releasing activity is concentrated other link, and this UE of mark is that soft handover area is detained state.In addition, for being in the UE that soft handover area is detained state, only in the signal quality variation of current area to a certain degree or the signal quality sub-district more much better occurred than current area, just allow UE to recover normal soft changing state.
Difference on this technical scheme, brought comparatively significantly beneficial effect, promptly for the UE that is detained and has high quality link in the soft handover area, because the method for accurate such UE of identification is provided, and only kept a best link for this UE, so both can guarantee this UE proper communication in high quality (for example using high-speed data service), can guarantee again that network side did not have the unnecessary wasting of resources.And, because the UE initiation soft switching link increase request of soft handover area delay state is limited, so can prevent the wasting of resources better.
Description of drawings
Fig. 1 is the schematic flow sheet according to the user equipment link management method in soft switch area of the first embodiment of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 1, comprise following process and step according to UE link management method in the soft handover area of first embodiment of the invention:
At first, the time that network side record UE keeps soft changing state, and judge whether this time exceeds first thresholding that presets, if, show after this UE enters soft handover area and be detained for a long time, perhaps be in soft handover area always, in this case, second the thresholding whether current active of further checking this UE is concentrated all links to have signal quality to surpass to preset.Specifically, this process is corresponding to the step 110 among Fig. 1～step 130:
In step 110, enter soft handoff procedure, UE reports active set to upgrade and finishes after the message, starts timer, and this length of timer is above-mentioned first thresholding.
In step 120, before the judgement timer expiry, whether UE leaves soft handover area, if, then enter step 190, stop timer, flow process finishes; Otherwise, enter step 130.
In step 130, the current active of checking UE is concentrated the signal quality of all links, judges the link of second thresholding that whether exists at least one signal quality to be better than in all links of current active collection to preset.If then enter step 140, otherwise flow process finishes.
After this, if exist at least one signal quality to be better than the link of second thresholding that presets in all links of current active collection, then according to a kind of rule, therefrom select a reservation, and releasing activity is concentrated other link.Then, mark UE is in soft handover area and is detained state, the common frequency measurement control information of revising among the UE is that soft handover is detained the cell measurement control information, this soft handover is detained cell measurement control information and is used to indicate UE to be lower than the 3rd thresholding that presets or the signal quality of other sub-districts is higher than under the situation of the 4th thresholding reporting measurement reports at the signal quality of current area.Wherein, the 4th thresholding is higher than the 3rd thresholding, and the value of the 4th thresholding can be the fixed value that presets, or the signal quality of current area adds a fixed value that presets.
If the step in the corresponding diagram 1, said process is corresponding to step 140～step 150.
In step 140, from all links of current active collection, select optimum link to be kept, all the other links are discharged, write down this UE and be in soft handover area delay state.It is pointed out that in the present invention, though in the present embodiment selected reservation be the best link of signal quality.But in other embodiments of the invention, also can be, or the combination of their task according to a factor in the loading condition of the coverage of signal quality, link affiliated subdistrict and link affiliated subdistrict, decision needs the link that keeps.
In step 150, revising the common frequency measurement control information is that the soft handover that is used to indicate UE to report above-mentioned measurement report is detained the cell measurement control information.
Then, after receiving measurement report, the measurement report type is differentiated, carry out following processing according to differentiating the result: be lower than the 3rd thresholding if measurement report shows the signal quality of current area, the soft handover area of removing this UE is detained state, recovers the common frequency measurement control information.If measurement report shows the signal quality of other sub-district and is higher than the measurement report of the 4th thresholding, then trigger soft handoff procedure again, and recover the common frequency measurement control information.
Specifically, the step 160～step 180 in the said process corresponding diagram 1.
In step 160, keep standing state, until receiving measurement report, judge Report Type,, then enter step 180 if the signal quality of report expression current area is lower than the 3rd thresholding that presets, if the signal quality of other sub-districts of report expression is higher than the 4th thresholding, then enter step 170.
In step 170, the soft handover area that empties this UE is detained status indicator, triggers soft handoff procedure again, and recovers normal measuring control information.
In step 180, the soft handover area that empties this UE is detained status indicator, recovers normal measuring control information.
This shows, the present invention monitored the time that UE is detained in soft handover area, having than the link of good quality and surpassing under the situation of predetermined thresholding, only keep quality link preferably, like this, for the UE that is detained and has high quality link in the soft handover area, because the method for accurate such UE of identification is provided, and only kept a best link for this UE, so both can guarantee this UE proper communication in high quality, can guarantee again that network side did not have the unnecessary wasting of resources.On the other hand, for being in the UE that soft handover area is detained state, only in the signal quality variation of current area to a certain degree or the signal quality sub-district more much better occurred than current area, just allow UE to recover normal soft changing state.Limit because soft handover area is detained the UE initiation soft switching link increase request of state, so can prevent the wasting of resources better.
Though by with reference to some preferred embodiment of the present invention, the present invention is illustrated and describes, those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (8)
1. a user equipment link management method in soft switch area is characterized in that, comprises following steps:
A network side recording user equipment keeps the time of soft changing state, and judges whether this time exceed first thresholding that presets, and concentrates the signal quality of all links if then check the current active of this subscriber equipment;
The link of second thresholding that B judges whether to exist at least one signal quality to be better than and presets if then therefrom select a reservation, discharges in the described active set other link.
2. user equipment link management method in soft switch area according to claim 1 is characterized in that, among the described step B, selected reservation be the best link of signal quality.
3. user equipment link management method in soft switch area according to claim 1 is characterized in that, among the described step B, determines the link that needs keep according to one of following factor or its combination in any:
The loading condition of the coverage of signal quality, link affiliated subdistrict and link affiliated subdistrict.
4. according to each described user equipment link management method in soft switch area in the claim 1 to 3, it is characterized in that described step B also further comprises following substep:
In discharging described active set behind other the link, the described subscriber equipment of mark is in soft handover area and is detained state, the common frequency measurement control information of revising in the subscriber equipment is that soft handover is detained the cell measurement control information, wherein, soft handover is detained cell measurement control information indication subscriber equipment reporting measurement reports when one of meeting the following conditions:
The signal quality of current area is lower than the 3rd thresholding that presets;
The signal quality of other sub-districts is higher than the 4th thresholding, and wherein the 4th thresholding is higher than described the 3rd thresholding.
5. user equipment link management method in soft switch area according to claim 4 is characterized in that, described method also comprises following steps:
For being in the subscriber equipment that soft handover area is detained state, when network side was lower than the measurement report of described the 3rd thresholding at the signal quality of receiving current area, the soft handover area of removing this subscriber equipment was detained state, recovers the common frequency measurement control information.
6. user equipment link management method in soft switch area according to claim 4 is characterized in that, the value of described the 4th thresholding is the fixed value that presets, or the signal quality of current area adds a fixed value that presets.
7. user equipment link management method in soft switch area according to claim 6 is characterized in that, described method also comprises following steps:
For being in the subscriber equipment that soft handover area is detained state, when network side is higher than the measurement report of described the 4th thresholding at the signal quality of receiving other sub-district, trigger soft handoff procedure again, and recover the common frequency measurement control information.
8. according to each described user equipment link management method in soft switch area in the claim 1 to 3, it is characterized in that described steps A comprises following substep:
When entering soft handoff procedure, described user equipment to report active set starts timer after upgrading and finishing message, and this length of timer is described first thresholding;
When described subscriber equipment leaves soft handover area, stop described timer;
When described timer expiry, check the signal quality of concentrated all links of current active of this subscriber equipment, the step of going forward side by side B.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100274178A CN100442914C (en) | 2005-06-30 | 2005-06-30 | User equipment link management method in soft switch area |
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| CNB2005100274178A CN100442914C (en) | 2005-06-30 | 2005-06-30 | User equipment link management method in soft switch area |
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| CN1889755A CN1889755A (en) | 2007-01-03 |
| CN100442914C true CN100442914C (en) | 2008-12-10 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1264530A (en) * | 1997-07-21 | 2000-08-23 | 夸尔柯姆股份有限公司 | Method and apparatus for selecting base stations to communicate with remote satation |
| WO2000064207A1 (en) * | 1999-04-16 | 2000-10-26 | Nortel Networks Limited | Method and apparatus for performing soft handoff between cells of large differing radii |
| CN1368829A (en) * | 2001-02-08 | 2002-09-11 | 华为技术有限公司 | Channel soft-switching method for global mobile communication system |
| JP2004248299A (en) * | 2003-02-14 | 2004-09-02 | Samsung Electronics Co Ltd | Uplink data retransmission system and method in code division multiple access communication system |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1264530A (en) * | 1997-07-21 | 2000-08-23 | 夸尔柯姆股份有限公司 | Method and apparatus for selecting base stations to communicate with remote satation |
| WO2000064207A1 (en) * | 1999-04-16 | 2000-10-26 | Nortel Networks Limited | Method and apparatus for performing soft handoff between cells of large differing radii |
| CN1368829A (en) * | 2001-02-08 | 2002-09-11 | 华为技术有限公司 | Channel soft-switching method for global mobile communication system |
| JP2004248299A (en) * | 2003-02-14 | 2004-09-02 | Samsung Electronics Co Ltd | Uplink data retransmission system and method in code division multiple access communication system |
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