CN103686913B - A kind of method and apparatus that access is switched over to user terminal - Google Patents
A kind of method and apparatus that access is switched over to user terminal Download PDFInfo
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Abstract
The present invention provides a kind of method and device that access is switched over to user terminal, including：Receive the measurement report for including adjacent area Timing Advance that user terminal is reported；Adjacent area Timing Advance is parsed from the measurement report；Calculate the difference between the adjacent area Timing Advance and current area Timing Advance；The difference and predetermined threshold value are compared, when the difference is less than the predetermined threshold value, user terminal is switched into adjacent area, when the difference is not less than the predetermined threshold value, user terminal adjacent area is not switched into.The adjacent area Timing Advance that the present invention can be reported according to user terminal switches over access, user terminal is switched near adjacent area, it efficiently avoid UE and be switched to coverage cell, inhibited the island effect that coverage cell is brought, so as to effectively improve network switching success rate, Network Call-drop Rate is reduced, the KPI indexs of network are lifted.
Description
Technical field
The present invention relates to moving communicating field, more particularly to a kind of method and dress that access is switched over to user terminal
Put.
Background technology
Pass through the construction of nearly 2 years, Long Term Evolution（Long Term Evolution, LTE）Network has begun to take shape, network
Have arrived at the condition of commercialization.In order to lift the critical sales index in network（Key Performance Indicator,
KPI）, each equipment commercial city is carrying out the work such as engineering optimization, parameter optimization and algorithm optimization.In optimization process, switch index
It is the most important thing therein.Because LTE wireless mobile communications are Cellular Networks, it is necessary to carry out coverage rule according to base station site
Draw, adjacent area addition is then carried out according to the planning coverage of each base station.If an actual coverage in base station much surpasses
Its planning coverage is crossed, then turned into coverage cell, once and user terminal（User Equipment, UE）Switch decision
Or be switched to coverage cell, because the neighbouring relations with crossing coverage cell are not planned in peripheral cell, may result in UE
Handoff relation is chaotic in moving process, it is impossible to is switched to target adjacent area, ultimately results in call drop.
The realization principle of switch decision is at present：Connect in UE reporting measurement reports, measurement report comprising adjacent area reference signal
Receive power（ReferenceSignalReceivingPower, RSRP）And Reference Signal Received Quality
（ReferenceSignalReceivingQuality, RSRQ）Value, base station according to RSRP the and RSRQ values of the UE adjacent areas reported,
It is compared with RSRP the and RSRQ values of UE current areas, if meeting gravity treatment or switching condition, base station will trigger switching.
In the prior art, gravity treatment and switch decision are only judged according to RSRP value, and the measurement report that UE is reported can be wrapped only
Include the Physical Cell Identifier of adjacent area（PhysCellId, PCI）With RSRP values, as shown in Figure 1.When adjacent area RSRP values with it is current small
When the difference of the RSRP values in area is more than some threshold value, base station will trigger switching flow, and switch decision rule is as follows：
RSRP_ncell-RSRP_scell ＞ handoff thresholds
And the thresholding of RSRP_scell ＜ serving cells
Wherein RSRP_ncell represents the RSRP values of adjacent cell, and RSRP_scell represents the RSRP values of current area.
But, can only be strong according to reference signal as described above as can be seen that base station is in above-mentioned switch decision rule
Degree is judged that whose signal intensity is high, and base station allows for UE switchings or gravity treatment to that cell, and this switching method can not be right
Cross coverage cell to be controlled, it is impossible to avoid UE from being switched to coverage cell.
The content of the invention
（One）The technical problem to be solved
The present invention provides a kind of method and apparatus that access is switched over to user terminal, to solve prior art to user
In the switch decision rule of terminal, it is impossible to avoid the technical problem for making user terminal be switched to coverage cell.
（Two）Technical scheme
In order to solve the above technical problems, the present invention provides a kind of method that access is switched over to user terminal, including：
Receive the measurement report for including adjacent area Timing Advance that user terminal is reported；
Adjacent area Timing Advance is parsed from the measurement report；
Calculate the difference between the adjacent area Timing Advance and current area Timing Advance；
The difference and predetermined threshold value are compared, when the difference is less than the predetermined threshold value, by user
Terminal switches to adjacent area, when the difference is not less than the predetermined threshold value, user terminal is not switched into adjacent area.
Further, distance/light velocity of the adjacent area Timing Advance=user terminal to neighbor base station.
Further, methods described also includes：
Adjacent area Reference Signal Received Power and current area Reference Signal Received Power are parsed from the measurement report；
The threshold value of the current area Reference Signal Received Power and serving cell is compared：
It is user is not whole when the current area Reference Signal Received Power is not less than the threshold value of the serving cell
End switches to adjacent area；
When the current area Reference Signal Received Power is less than the threshold value of the serving cell, continue to calculate adjacent area
The difference of Reference Signal Received Power and current area Reference Signal Received Power, the difference and handoff threshold are compared：
When the difference is more than the handoff threshold, user terminal is switched into adjacent area；When the difference is not more than the handoff threshold,
User terminal adjacent area is not switched into.
Further, the predetermined threshold value is：0.01ms.
On the other hand, the present invention also provides a kind of device that access is switched over to user terminal, including：What order was connected
Measurement report receiving unit, measurement report resolution unit, computing unit and switch unit, wherein：
Measurement report receiving unit, for receiving the measurement report for including adjacent area Timing Advance that user terminal is reported；
Measurement report resolution unit, for parsing adjacent area Timing Advance from the measurement report；
Computing unit, for calculating the difference between the adjacent area Timing Advance and current area Timing Advance；
Comparing unit, for the difference and predetermined threshold value to be compared, when the difference is less than the pre- gating
During limit value, indicate that switch unit is switched over；When the difference is not less than the predetermined threshold value, other operations are not done；
Switch unit, for user terminal to be switched into adjacent area.
Further, the adjacent area Timing Advance is user terminal to the distance of neighbor base station and the ratio of the light velocity.
Further,
The measurement report resolution unit is additionally operable to：Adjacent area Reference Signal Received Power is parsed from the measurement report
With current area Reference Signal Received Power；
The comparing unit is additionally operable to：
The threshold value of the current area Reference Signal Received Power and serving cell is compared：When described current small
When area's Reference Signal Received Power is not less than the threshold value of the serving cell, other operations are not done；
When the current area Reference Signal Received Power is less than the threshold value of the serving cell, computing unit is indicated
Calculate the difference of adjacent area Reference Signal Received Power and current area Reference Signal Received Power, and by the difference and handoff threshold
It is compared：When the difference is more than the handoff threshold, indicate that switch unit is switched over；When the difference is not more than described cut
When changing thresholding, other operations are not done；
The computing unit is additionally operable to：Calculate adjacent area Reference Signal Received Power and current area Reference Signal Received Power
Difference.
Further, the predetermined threshold value is：0.01ms.
（Three）Beneficial effect
It can be seen that, switch over the method and device of access to user terminal proposed by the present invention, can be according to user
The adjacent area Timing Advance that terminal is reported switches over access, so as to according to adjacent area Timing Advance and current area time
Difference between lead, to judge the distance of user terminal to base station so that user terminal can switch to apart near neighbour
Qu Shang, efficiently avoid UE and was switched to coverage cell, it is suppressed that cross the island effect that coverage cell is brought.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are this hairs
Some bright embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can be with root
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the content schematic diagram of measurement report in the prior art；
Fig. 2 is the basic procedure schematic diagram for the method that the embodiment of the present invention switches over access to user terminal；
Fig. 3 is the schematic flow sheet for the method that a preferred embodiment of the invention switches over access to user terminal；
Fig. 4 is the content schematic diagram of a preferred embodiment of the invention measurement report；
Fig. 5 is a preferred embodiment of the invention X2 hand off signaling schematic flow sheets；
Fig. 6 is the basic structure schematic diagram for the device that the embodiment of the present invention switches over access to user terminal.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In the prior art to UE switch decision rule, it can only be judged according to the intensity of reference signal, once by UE
Coverage cell was switched to, it can be caused to can not find suitable adjacent area switching, so that switching is chaotic, business call drop is ultimately caused
Problem.Or when UE arrived coverage cell in idle condition gravity treatment, the shifting after the completion of coverage cell switch decision is crossed can be caused
During dynamic, the problem of can not find suitable adjacent area and can not switch causes switching chaotic, ultimately causes call drop, be exactly above
Cross the island effect of coverage cell.
On this basis, the embodiment of the present invention proposes a kind of method that access is switched over to user terminal first, referring to
Fig. 2, including：
Step 201：Receive the measurement report for including adjacent area Timing Advance that user terminal is reported.
Step 202：Adjacent area Timing Advance is parsed from the measurement report.
Step 203：Calculate the difference between the adjacent area Timing Advance and current area Timing Advance.
Step 204：The difference and predetermined threshold value are compared, when the difference is less than the predetermined threshold value
When, user terminal is switched into adjacent area, when the difference is not less than the predetermined threshold value, user terminal neighbour is not switched into
Area.
It can be seen that, switch over the method for access to user terminal what the embodiment of the present invention was proposed, can be according to user
The adjacent area Timing Advance that terminal is reported switches over access, so as to according to adjacent area Timing Advance and current area time
Difference between lead, to judge the distance of user terminal to base station so that user terminal can switch to apart near neighbour
Qu Shang, efficiently avoid UE and was switched to coverage cell, it is suppressed that cross the island effect that coverage cell is brought.
In one embodiment of the invention, adjacent area Timing Advance（Timing advanced, TA）It can be expressed as using
Family terminal is to the distance of neighbor base station and the ratio of the light velocity, i.e.,：
Distance/light velocity of adjacent area Timing Advance=user terminal to neighbor base station.
In another embodiment of the present invention, the measurement report that user terminal is reported not only includes adjacent area time advance
Amount, in addition to adjacent area Reference Signal Received Power and Physical Cell Identifier.When base station obtains the measurement report for including above-mentioned parameter
When, it is preferable that adjacent area Reference Signal Received Power can be parsed from measurement report and current area reference signal receives work(
Rate, and the threshold value of current area Reference Signal Received Power and serving cell is compared：
When current area Reference Signal Received Power is not less than the threshold value of the serving cell, user terminal is not cut
Shift to adjacent area；
When current area Reference Signal Received Power is less than the threshold value of the serving cell, i.e.,：
The thresholding of RSRP_scell ＜ current areas,
RSRP_scell be current area Reference Signal Received Power, then continue calculate adjacent area Reference Signal Received Power and
The difference of current area Reference Signal Received Power, and the difference and handoff threshold are compared：
When the difference is more than the handoff threshold, i.e.,：
RSRP_ncell-RSRP_scell ＞ handoff thresholds
RSRP_ncell is adjacent area Reference Signal Received Power, and user terminal is switched into adjacent area；When the difference is not more than
During the handoff threshold, user terminal adjacent area is not switched into.The two conditions can ensure that UE is switched to the strong cell of signal.
Further, since also needing to meet：
TA_ncell-TA_scell ＜ predetermined threshold values,
Wherein TA_ncell is adjacent area Timing Advance, and TA_scell is current area Timing Advance, then this condition
It can ensure that UE is switched to the adjacent area nearest apart from current area；Above three condition is met simultaneously, then can ensure that UE switches
Onto nearest apart from current area, signal intensity most strong adjacent area.
In another embodiment of the present invention, it is preferable that switching cut-in method in predetermined threshold value can be：
0.01ms。
Below exemplified by switching over access to user terminal, to illustrate the realization of one embodiment of the invention
Journey, referring to Fig. 3：
Step 301：What reception user terminal was reported includes the measurement report of adjacent area TA, RSRP and PCI value.
In the embodiment of the present invention, in order to avoid making on the coverage cell of crossing of user terminal switch decision, user terminal needs
Biography includes the measurement report of adjacent area TA, RSRP and PCI value, to switch over access.The measurement report that is uploaded as shown in figure 4,
Wherein physcellid is that the TA Result in adjacent area PCI values, square frame are adjacent area Timing Advance, and rsrpresult is neighbour
Area's RSRP values.
Step 302：Adjacent area Timing Advance, adjacent area Reference Signal Received Power and current small are parsed from measurement report
Area's Reference Signal Received Power.
Step 303：Carried out switching over user terminal access according to measurement report.
In this step, the switch decision of user terminal is carried out using following switch decision condition：
The thresholding of RSRP_scell ＜ current areas,
RSRP_ncell-RSRP_scell ＞ handoff thresholds,
TA_ncell-TA_scell ＜ TA threshold value,
Wherein RSRP_ncell is adjacent area Reference Signal Received Power, and RSRP_scell receives for current area reference signal
Power, TA_ncell is adjacent area Timing Advance, and TA_scell is current area Timing Advance, and TA threshold value is
0.01ms。
When meeting above three condition simultaneously, then user terminal is switched into adjacent area.Wherein the first two condition can be protected
Card UE is switched to the strong cell of signal；3rd condition can ensure that UE is switched to the adjacent area nearest apart from current area；Simultaneously
Three conditions are met, then can ensure that UE is switched on nearest apart from current area, signal intensity most strong adjacent area, effectively
Avoid the situation that user terminal was switched into coverage cell to occur, it is suppressed that cross the island effect that coverage cell is brought.
The embodiment of the present invention does not have any influence on signaling process, and implementation process is fairly simple.Fig. 5 is the embodiment of the present invention
Between base station X2 switch schematic flow sheet, compared with prior art, only need in the measurement report of the 2nd step, user terminal to
Source base station sends the measurement report for including adjacent area TA, then carries out the switch decision request in 2a and 2b and replies, you can be real
The signaling switching flow of the existing embodiment of the present invention.
So far, then the overall process that the embodiment of the present invention switches over the method for access to user terminal is completed.
One embodiment of the present of invention also provides a kind of device that access is switched over to user terminal, referring to Fig. 6, bag
Include：
Measurement report receiving unit 601, for receiving the measurement report for including adjacent area Timing Advance that user terminal is reported
Accuse；
Measurement report resolution unit 602, for parsing adjacent area Timing Advance from the measurement report；
Computing unit 603, for calculating the difference between the adjacent area Timing Advance and current area Timing Advance；
Comparing unit 604, for the difference and predetermined threshold value to be compared, when the difference is less than described preset
During threshold value, indicate that switch unit 605 is switched over；When the difference is not less than the predetermined threshold value, other behaviour are not
Make；
Switch unit 605, for user terminal to be switched into adjacent area.
In one embodiment of the invention, adjacent area TA can be expressed as user terminal to the distance and the light velocity of neighbor base station
Ratio, unit is ms, and formula is：
Distance/light velocity of adjacent area Timing Advance=user terminal to neighbor base station.
In another embodiment of the present invention, the measurement report that user terminal is reported not only includes adjacent area time advance
Amount, can also include adjacent area Reference Signal Received Power, current area Reference Signal Received Power and Physical Cell Identifier.It is preferred that
Ground, measurement report resolution unit 602 is additionally operable to：Adjacent area Reference Signal Received Power and current area are parsed from measurement report
Reference Signal Received Power；
Comparing unit 604 is additionally operable to：
The threshold value of current area Reference Signal Received Power and serving cell is compared：When current area is with reference to letter
When number receiving power is not less than the threshold value of the serving cell, other operations are not done；
When current area Reference Signal Received Power is less than the threshold value of serving cell, indicate that computing unit 603 is calculated
The difference of adjacent area Reference Signal Received Power and current area Reference Signal Received Power, and the difference and handoff threshold are carried out
Compare：When the difference is more than handoff threshold, indicate that switch unit 605 is switched over；When the difference is not more than handoff threshold,
Other operations are not done；
Computing unit 603 is additionally operable to：Calculate adjacent area Reference Signal Received Power and current area Reference Signal Received Power
Difference.
Namely when meeting equation below simultaneously, user terminal is switched into adjacent area：
The thresholding of RSRP_scell ＜ current areas,
RSRP_ncell-RSRP_scell ＞ handoff thresholds,
TA_ncell-TA_scell ＜ TA threshold value,
Wherein RSRP_ncell is adjacent area Reference Signal Received Power, and RSRP_scell receives for current area reference signal
Power, TA_ncell is adjacent area Timing Advance, and TA_scell is current area Timing Advance.Above-mentioned the first two condition can be with
Ensure that UE is switched to the strong cell of signal；3rd condition can ensure that UE is switched to the adjacent area nearest apart from current area；Together
When meet three conditions, then can ensure that UE is switched on nearest apart from current area, signal intensity most strong adjacent area.
In another embodiment of the present invention, the predetermined threshold value of the TA in switch determining method can be：0.01ms.
It can be seen that, the embodiment of the present invention has the advantages that：
The method and device of access is switched over to user terminal what the embodiment of the present invention was proposed, can be according to user
The adjacent area Timing Advance that terminal is reported switches over access, so as to according to adjacent area Timing Advance and current area time
Difference between lead, to judge the distance of user terminal to base station so that user terminal can switch to apart near neighbour
Qu Shang, efficiently avoid UE and was switched to coverage cell, it is suppressed that cross the island effect that coverage cell is brought.
The present invention can consider adjacent area RSRP values and the Timing Advance that user terminal is reported, and carry out to user terminal
Switch decision.It is small for Timing Advance, it regard adjacent area high RSRP as preferential switching target small area；For RSRP value phases
When adjacent area, then the preferential switching target small area of the small conduct of selection time lead.By the choosing comprehensively of both the above condition,
Network switching success rate can be effectively improved, Network Call-drop Rate is reduced, so as to lift the KPI indexs of network.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (6)
1. a kind of method that access is switched over to user terminal, it is characterised in that including：
Receive the physical area for including adjacent area Timing Advance, adjacent area Reference Signal Received Power and adjacent area that user terminal is reported
The measurement report of mark；
Adjacent area Timing Advance, adjacent area Reference Signal Received Power and current area are parsed from the measurement report with reference to letter
Number receiving power；
Calculate the difference between the adjacent area Timing Advance and current area Timing Advance；
Difference between the adjacent area Timing Advance and current area Timing Advance is compared with predetermined threshold value, when
Difference between the adjacent area Timing Advance and current area Timing Advance is less than the predetermined threshold value, described current small
Area's Reference Signal Received Power is less than the threshold value and adjacent area Reference Signal Received Power and current area reference letter of serving cell
When the difference of number receiving power is more than handoff threshold, user terminal is switched into adjacent area；
When the difference between adjacent area Timing Advance and current area Timing Advance be not less than the predetermined threshold value, or, work as
The current area Reference Signal Received Power is not less than the threshold value of the serving cell, or, when adjacent area reference signal is received
When the difference of power and current area Reference Signal Received Power is not more than handoff threshold, user terminal adjacent area is not switched into.
2. the method according to claim 1 that access is switched over to user terminal, it is characterised in that：The adjacent area time
Distance/the light velocity of the lead=user terminal to neighbor base station.
3. the method according to claim 1 or 2 that access is switched over to user terminal, it is characterised in that described default
Threshold value is：0.01ms.
4. a kind of device that access is switched over to user terminal, it is characterised in that including：The connected measurement report of order is received
Unit, measurement report resolution unit, computing unit and switch unit, wherein：
Measurement report receiving unit, connects for receiving include adjacent area Timing Advance, adjacent area reference signal that user terminal is reported
Receive the measurement report of power and the Physical Cell Identifier of adjacent area；
Measurement report resolution unit, connects for parsing adjacent area Timing Advance, adjacent area reference signal from the measurement report
Receive power and current area Reference Signal Received Power；
Computing unit, for calculating difference and calculating between the adjacent area Timing Advance and current area Timing Advance
The difference of adjacent area Reference Signal Received Power and current area Reference Signal Received Power；
Comparing unit, for the difference between adjacent area Timing Advance and current area Timing Advance and predetermined threshold value to be entered
Row compares, the threshold value of the current area Reference Signal Received Power and serving cell is compared and adjacent area is referred to
Signal reception power and the difference of current area Reference Signal Received Power are compared with handoff threshold, when adjacent area time advance
Difference between amount and current area Timing Advance is less than the predetermined threshold value, the current area reference signal and receives work(
Rate is less than the threshold value of the serving cell and adjacent area Reference Signal Received Power and current area Reference Signal Received Power
When difference is more than handoff threshold, indicate that switch unit is switched over；When adjacent area Timing Advance and current area Timing Advance
Between difference be not less than the predetermined threshold value, or, when the current area Reference Signal Received Power be not less than the clothes
The threshold value for cell of being engaged in, or, when the difference of adjacent area Reference Signal Received Power and current area Reference Signal Received Power is little
When handoff threshold, other operations are not done；
Switch unit, for user terminal to be switched into adjacent area.
5. the device according to claim 4 that access is switched over to user terminal, it is characterised in that the adjacent area time
Lead is user terminal to the distance of neighbor base station and the ratio of the light velocity.
6. the device that access is switched over to user terminal according to claim 4 or 5, it is characterised in that described default
Threshold value is：0.01ms.
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| CN201310677034.XA CN103686913B (en) | 2013-12-11 | 2013-12-11 | A kind of method and apparatus that access is switched over to user terminal |
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| CN201310677034.XA CN103686913B (en) | 2013-12-11 | 2013-12-11 | A kind of method and apparatus that access is switched over to user terminal |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106171010A (en) * | 2015-02-10 | 2016-11-30 | 华为技术有限公司 | Terminal sets up method, secondary nodal point, first terminal and the second terminal connected |
| CN106804047A (en) * | 2015-11-26 | 2017-06-06 | 北京信威通信技术股份有限公司 | LTE network based on TA receives the method and device with congestion control |
| WO2019022756A1 (en) * | 2017-07-28 | 2019-01-31 | Nokia Solutions And Networks Oy | Method for detection of wireless broadband coverage holes |
| CN109982351B (en) * | 2017-12-28 | 2022-04-08 | 中国移动通信集团山东有限公司 | A kind of processing method and device for too far coverage |
| WO2020042959A1 (en) * | 2018-08-29 | 2020-03-05 | Oppo广东移动通信有限公司 | Ui display method and device, terminal device and storage medium |
| CN112218343B (en) * | 2019-07-12 | 2023-09-05 | 中国移动通信集团吉林有限公司 | Cell inter-frequency handover method, device and computer equipment |
| EP4106404A4 (en) * | 2020-02-25 | 2023-04-12 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Communication method and apparatus |
| WO2024000602A1 (en) * | 2022-07-01 | 2024-01-04 | 深圳传音控股股份有限公司 | Measurement starting method, communication device, and storage medium |
| CN120238943A (en) * | 2023-12-22 | 2025-07-01 | 展讯通信（上海）有限公司 | Communication method, device, electronic device and storage medium |
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