CN103458469B - A kind of handoff parameter adjusting method based on mobile status - Google Patents
A kind of handoff parameter adjusting method based on mobile status Download PDFInfo
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- CN103458469B CN103458469B CN201210181168.8A CN201210181168A CN103458469B CN 103458469 B CN103458469 B CN 103458469B CN 201210181168 A CN201210181168 A CN 201210181168A CN 103458469 B CN103458469 B CN 103458469B
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Abstract
The invention provides a kind of handoff parameter adjusting method based on mobile status, comprise the steps: the number of cells n that A, user equipment (UE) record experience within the first persistent period and the number of cells p experienced in the second persistent period; B, UE judge that whether n is more than the ultrahigh speed mobile cell number thresholding pre-set, and is if so, multiplied by the ultrahigh speed Dynamic gene being pre-configured with by triggered time parameter TTT; Otherwise perform step C; If C n is less than ultrahigh speed mobile cell number thresholding and more than high-speed mobile number of cells thresholding, TTT is multiplied by high speed Dynamic gene; If n is less than high-speed mobile number of cells thresholding and more than middling speed mobile cell number thresholding, TTT is multiplied by middling speed Dynamic gene; If p is less than middling speed mobile cell number thresholding, TTT is not adjusted. The present invention is adapted to the expansion of the velocity interval of UE, so that the UE of higher translational speed can perform switching quickly.
Description
Technical field
The present invention relates to mobile communication technology field, particularly relate to a kind of handoff parameter adjusting method based on mobile status.
Background technology
When UE in existing mobile communication system carries out community switching, it is necessary to estimate the mobile status of oneself, thus triggered time (TTT, TimeToTrigger) this handoff parameter being adjusted according to mobile status. UE according to oneself at certain time intervals in the number of community that experiences adjudicate mobile status. Current system defines three mobile status: constant speed, middling speed and at a high speed. UE mobile status is estimated and TTT adjustment criterion is as follows:
If in persistent period t-Evaluation, the number of cells of experience exceedes high-speed mobile number of cells thresholding (n-CellChangeHigh), then UE enters high-speed moving state, and now, TTT needs to be multiplied by high speed Dynamic gene (sf-High).
If in persistent period t-Evaluation, the number of cells of experience exceedes middling speed mobile cell number thresholding (n-CellChangeMedium), but less than high-speed mobile number of cells thresholding (n-CellChangeHigh), then UE enters middling speed mobile status, now, TTT needs to be multiplied by middling speed Dynamic gene (sf-Medium).
If in persistent period t-HystNormal, the number of cells of experience is less than middling speed mobile cell number thresholding (n-CellChangeMedium), then UE enters constant speed mobile status, and now, TTT need not adjust. Above parameter is all that network side is allocated to UE by high-level signaling. Wherein, the parameter that judgement mobile status uses is indicated by IE " MobilityStateParameters ", as follows:
Parameter for adjusting TTT is indicated by IE " SpeedStateScaleFactors ", as follows:
If the burst types that the measurement that network side is UE configuration reports is that event triggers, then UE needs to use TTT parameter to determine an interval, the starting point of this interval is that the measurement result of adjacent cell meets and measures the entry condition reporting triggering event, and terminal is the UE measurement result reporting this community.During TTT, UE is also possible to adjacent cell be taken multiple measurements, and only all of measurement result all meets the entry condition of triggering event, and when TTT terminates, UE just can measure and report. The measurement of UE reports process as shown in Figure 1.
Network side reports according to the measurement of UE and switches over judgement, just can perform handover operation afterwards, and therefore TTT is more little, it is meant that the measurement of UE reports more fast, the more morning that switching performs; Otherwise, TTT is more big, then the measurement of UE reports more slow, and it is more late that switching performs. For high-speed moving state, UE can enter in switching target small area quickly, and now TTT can be adjusted less value by UE, so can earlier perform switching, thus avoiding switching too late. Moving mobile status for constant speed, UE can more slowly enter in switching target small area, and now TTT can be adjusted bigger value by UE, so can be more late perform switching, thus avoiding too early switching. It will be seen that TTT parameter is adjusted by UE according to the translational speed of oneself, thus avoiding switching too early or too late, improve the success rate of switching.
At present, the Wireless Telecom Equipment of increasing high-speed mobile needs to be linked in mobile communication system, the mobile relay equipment that wherein the most representational 3GPP of being exactly is discussing. In order to improve the service quality of the high velocity mobile users under high ferro scene, 3GPP introduces mobile relay technology in LTE system. The network architecture of mobile relay is as shown in Figure 2. By installing mobile relay equipment 202 in high-iron carriage 205, the subscriber equipment (UE, UserEquipment) (UE1 or UE2) in compartment can pass through mobile relay equipment 202 and be linked in mobile communications network. UE is communicated with mobile relay equipment 202 by access link (accesslink), mobile relay equipment 202 is communicated with host base station (DonoreNB) 201 by return link (backhaullink), and the mode thereby through double bounce transmission provides Mobile Communication Service for UE. For host base station 201, mobile relay equipment 202 is equivalent to a UE; For UE1 or UE2 in compartment, mobile relay equipment 202 is equivalent to a base station. When high ferro is run, mobile relay equipment 202 needs to switch between different host base station, and namely the return link of mobile relay equipment needs to be switched to another host base station from a host base station; And the UE in compartment is coupled by the access link of mobile relay all the time, being not required to more changing district, therefore UE is not required to perform handoff procedure. Such network architecture avoids group's switching problem of a large amount of UE in compartment, decreases the signaling consumption of network, but brings new challenge to the switching of the return link of mobile relay simultaneously.
When mobile relay equipment moves, it is necessary to switch between different host base station, in order to adapt to the speed of self, mobile relay equipment needs TTT parameter is adjusted. In prior art, the mobile status one of UE is divided into Three Estate: constant speed, middling speed and high speed, the adjustment of TTT is also only divided into Three Estate accordingly, to adapt to the performance of handoffs demand under different mobile status. The UE more and more along with future with more speed is linked into mobile communications network, the translational speed scope of UE will expand, it is not enough for now only the mobile status of UE being divided into Three Estate, and the TTT parameter after being adjusted according to mobile status will be unsuitable for some UE speed.Such as mobile relay equipment, its speed can reach more than 300km/h, is adjusted TTT being inappropriate if now re-using original parameter, it is easy to occurs to switch too late. That is, the definition to high-speed moving state in existing network of the speed of mobile relay, if now using original parameter sf-High that TTT is adjusted, TTT after adjustment is for mobile relay or bigger than normal, it is corresponding with its translational speed that mobile relay needs a less TTT to come, thus performing switching faster.
Summary of the invention
The invention provides a kind of handoff parameter adjusting method based on mobile status, it is possible to adapt to the expansion of the velocity interval of UE.
A kind of handoff parameter adjusting method based on mobile status that the embodiment of the present invention provides, comprises the steps:
Number of cells n that A, user equipment (UE) record experience within the first persistent period and the number of cells p of experience in the second persistent period;
B, UE judge that whether n is more than the ultrahigh speed mobile cell number thresholding pre-set, and is if so, multiplied by the ultrahigh speed Dynamic gene being pre-configured with by triggered time parameter TTT; Otherwise perform step C;
If C n is less than ultrahigh speed mobile cell number thresholding and more than high-speed mobile number of cells thresholding, TTT is multiplied by high speed Dynamic gene; If n is less than high-speed mobile number of cells thresholding and more than middling speed mobile cell number thresholding, TTT is multiplied by middling speed Dynamic gene; If p is less than middling speed mobile cell number thresholding, TTT is not adjusted.
It is preferred that farther include before step A: ultrahigh speed mobile cell number thresholding and ultrahigh speed Dynamic gene are allocated to UE by measuring configuration message by network side.
It is preferred that the span of ultrahigh speed mobile cell number thresholding is more than high-speed mobile number of cells thresholding and less than 50.
It is preferred that the span of ultrahigh speed Dynamic gene is less than high speed Dynamic gene and more than 0.
The embodiment of the present invention also provides for a kind of handoff parameter adjusting method based on mobile status, comprises the steps:
Network side gives user device configuration at least m number of cells thresholding and each corresponding Dynamic gene of number of cells thresholding in advance; M is more than or equal to 4;
UE records the number of cells n experienced within the first persistent period and the number of cells p experienced in the second persistent period;
Described n or p and number of cells thresholding are contrasted by UE, if p is less than the first number of cells thresholding, triggered time parameter constant; If n is more than the i-th number of cells thresholding and less than i+1 number of cells thresholding, triggered time parameter is multiplied by the i-th Dynamic gene, 1 < i < m; If n is more than m number of cells thresholding, triggered time parameter is multiplied by m Dynamic gene.
As can be seen from the above technical solutions, by UE mobile status is extended, to adapt to the expansion of the velocity interval of UE, so that the UE of higher translational speed can perform switching quickly.
Accompanying drawing explanation
The measurement that Fig. 1 is UE reports process schematic;
Fig. 2 is the network architecture schematic diagram of mobile relay;
A kind of handoff parameter adjusting method flow chart based on mobile status that Fig. 3 provides for the embodiment of the present invention.
Detailed description of the invention
The invention provides a kind of handoff parameter adjusting method based on mobile status, it is possible to adapt to UE translational speed more widely. Give user device configuration at least m number of cells thresholding and each corresponding Dynamic gene of number of cells thresholding in advance; M is more than or equal to 4;
The number of cells p that UE record experiences in number of cells n and t-HystNormal of experience in persistent period t-Evaluation;
Described n or p and number of cells thresholding are contrasted by UE, if p is less than the first number of cells thresholding, triggered time parameter constant; If n is more than the i-th number of cells thresholding and less than i+1 number of cells thresholding, triggered time parameter is multiplied by the i-th Dynamic gene, 1 < i < m; If n is more than m number of cells thresholding, triggered time parameter is multiplied by m Dynamic gene.
For making the know-why of technical solution of the present invention, feature and technique effect clearly, below in conjunction with specific embodiment, the present invention program is described in detail.
In the present invention program, define one or more new UE mobile status, to adapt to the expansion of the velocity interval of UE. It is to say, the mobile status of UE is now divided into the grade more than 3, corresponding each grade can a corresponding parameter being used for adjusting TTT.
In order to UE judges new mobile status, network side needs for the UE new mobile status decision threshold of configuration, it is possible to adopt existing method, and namely the number of the community by experiencing in certain time interval makes decisions. The value of the number of cells thresholding of existing system is the integer between 1～16, can it be extended in this programme. Meanwhile, network side needs to configure the parameter for adjusting TTT of corresponding new mobile status for UE. The TTT of existing system adjusts the value of parameter and includes: 0.25,0.5,0.75,1, can it be extended in this programme.
By RRC signaling, network side can be that UE carries out as configured above, after UE receives this configuration, judges the mobile status of oneself according to mobile status decision threshold, adopts the TTT Dynamic gene corresponding with this mobile status that TTT is adjusted afterwards.
A kind of handoff parameter adjusting method flow process based on mobile status that the embodiment of the present invention provides is as it is shown on figure 3, comprise the steps:
Step 301: the number of cells p of experience in number of cells n and t-HystNormal that user equipment (UE) record experiences in persistent period t-Evaluation;
Step 302:UE judges that whether n is more than the ultrahigh speed mobile cell number thresholding pre-set, and is if so, multiplied by the ultrahigh speed Dynamic gene being pre-configured with by triggered time parameter TTT; Otherwise perform step 303;
Step 303: if n is less than ultrahigh speed mobile cell number thresholding and more than high-speed mobile number of cells thresholding, TTT is multiplied by high speed Dynamic gene; If n is less than high-speed mobile number of cells thresholding and more than middling speed mobile cell number thresholding, TTT is multiplied by middling speed Dynamic gene; If p is less than middling speed mobile cell number thresholding, TTT is not adjusted.
Hereinafter this programme is illustrated.
One new mobile status of system definition, such as ultrahigh speed mobile status. For the mobile status that this is new, define new decision threshold and new TTT adjusts parameter, such as ultrahigh speed mobile cell number thresholding (n-CellChangeUltraHigh), span can be the integer between 1 to 50, and more than high-speed mobile number of cells thresholding, for instance, it is possible to it is taken as 30; And ultrahigh speed Dynamic gene (sf-ultraHigh), span can be the decimal between 0 to 1, and less than high speed Dynamic gene, for instance 0.1 can be taken as.
When UE estimates the mobile status of oneself, if it find that in persistent period t-Evaluation, the number of cells of experience is more than n-CellChangeUltraHigh, then UE enters ultrahigh speed mobile status, and now, TTT needs to be multiplied by sf-ultraHigh.
Network side can pass through to measure configuration message by parameter configuration new for the two to UE.
To revise IE in existing protocol " MobilityStateParameters(mobile status parameter) ", the IE after adding new thresholding n-CellChangeUltraHigh is as follows:
To revise IE in existing protocol " SpeedStateScaleFactors(speed state zoom factor) ", add the IE after new TTT adjusts parameter sf-ultraHigh as follows:
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within the scope of protection of the invention.
Claims (1)
1. the handoff parameter adjusting method based on mobile status, it is characterised in that comprise the steps:
Network side gives user device configuration at least m number of cells thresholding and each corresponding Dynamic gene of number of cells thresholding in advance; M is more than or equal to 4;
UE records the number of cells n experienced within the first persistent period and the number of cells p experienced in the second persistent period;
Described n or p and number of cells thresholding are contrasted by UE, if p is less than the first number of cells thresholding, triggered time parameter constant; If n is more than the i-th number of cells thresholding and less than i+1 number of cells thresholding, triggered time parameter is multiplied by the i-th Dynamic gene, 1 < i < m; If n is more than m number of cells thresholding, triggered time parameter is multiplied by m Dynamic gene.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102256318A (en) * | 2011-08-11 | 2011-11-23 | 新邮通信设备有限公司 | Adjustment method for handoff parameter |
| CN102264108A (en) * | 2010-05-25 | 2011-11-30 | 电信科学技术研究院 | Method and equipment for adjusting mobility parameters |
| CN103428789A (en) * | 2012-05-21 | 2013-12-04 | 普天信息技术研究院有限公司 | Switching method of repeater |
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| CN102264108A (en) * | 2010-05-25 | 2011-11-30 | 电信科学技术研究院 | Method and equipment for adjusting mobility parameters |
| CN102256318A (en) * | 2011-08-11 | 2011-11-23 | 新邮通信设备有限公司 | Adjustment method for handoff parameter |
| CN103428789A (en) * | 2012-05-21 | 2013-12-04 | 普天信息技术研究院有限公司 | Switching method of repeater |
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