CN103929785B - Serving cell channel method for handover control and device - Google Patents
Serving cell channel method for handover control and device Download PDFInfo
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- CN103929785B CN103929785B CN201310014333.5A CN201310014333A CN103929785B CN 103929785 B CN103929785 B CN 103929785B CN 201310014333 A CN201310014333 A CN 201310014333A CN 103929785 B CN103929785 B CN 103929785B
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Abstract
The invention discloses a kind of serving cell channel method for handover control and device, its method includes：When needing asynchronised handover, base station controller sends Channel Activation to the base station of target serving district and instructed；The base station of target serving district is activated to base station controller Return Channel and responded, and obtains default change detection requirement level；Base station controller sends switching command to the base station of former serving cell, and switching command is forwarded into mobile station by the base station of former serving cell；Mobile station sends switching access request to the base station of target serving district；The base station of target serving district judges whether the signal level value for switching access request is less than default change detection and requires level；If it is, mobile station returns to the channel of former serving cell；If it is not, then mobile station carries out normal channel switching.The present invention be prevented effectively from because target serving district uplink downlink is uneven and caused by mobile station Special Handle of Drop Question, it is ensured that the quality of call.
Description
Technical field
The present invention relates to communication technique field, serving cell channel method for handover control and device are related specifically to.
Background technology
In GSM（Global System for Mobile Communications, global system for mobile communications）Communication neck
In domain, the hand-held mobile station of user（Mobile Station, MS）Position be unfixed, and the base station of network side（Base
Transceiver Station, BTS）Be then it is fixed, when the hand-held MS of user in communication process from base station
The area of coverage is moved to another base station overlay area, or because when external interference causes the speech quality to decline, one kind is effectively drawn
The measure of rescuing is exactly to switch, and the voice channel of the MS of user from original serving cell is switched into a new serving cell near MS
Idle speech channel get on, that is, realize the switching control of cell.
Traditional cell switching control, due to only sentencing before handover to the downlink reception level information of Target cell
It is disconnected, the multi-upstream access situation after MS access Target cells can not be predicted, after selected target cell, MS is according to traditional switching side
Method is initiated to access in Target cell.If it is larger to there is power setting in Target cell, when there is uneven situation in uplink downlink,
MS, which is successfully accessed after Target cell, easily occurs call drop, and speech quality can also be affected.Prior art typically connects using as MS
Enter after Target cell, by receiving MS effective measurement report, and using certain algorithm switch over judgement allow user from this
Cell is switched out, and these algorithms need to receive multiple measurement reports and could reasonably made decisions, and for a user will
There is the speech perception of certain time very poor；And when BTS fails the measurement report for solving MS due to uplink downlink equilibrium problem,
Corresponding neighboring BS information can not be then obtained, therefore MS can not be switched out, conversation loss may finally be caused.
The content of the invention
The main object of the present invention is small to provide a kind of service for being prevented effectively from generation Special Handle of Drop Question after switching serving cell
Area's channel switching control method and device.
The present invention proposes a kind of serving cell channel method for handover control, including step：
When base station controller judges to need asynchronised handover, the base station controller is sent to the base station of target serving district
Channel Activation is instructed；
The base station of the target serving district is returned after the Channel Activation instruction is received to the base station controller
Channel Activation is responded, and obtains default change detection requirement level；
The base station controller sends switching after the Channel Activation response is received, to the base station of former serving cell and referred to
Order, and the switching command is forwarded to mobile station by the base station of former serving cell；
The mobile station sends switching access request to the target serving district after the switching command is received
Base station；
The base station of the target serving district judges the switching access request after the switching access request is received
Signal level value whether be less than the default change detection and require level；If it is, the mobile station returns to former service
The channel of cell；If it is not, then the mobile station carries out normal channel switching.
Preferably, the default change detection requires that level is arranged at the Channel Activation by the base station controller and referred to
In order, or by the base station of the target serving district set and be stored in the memory of itself.
Preferably, the step of mobile station returns to the channel of former serving cell specifically includes：
When the base station of the target serving district judges that the signal level value of the switching access request is less than described preset
Change detection when requiring level, the base station of the target serving district refuses to send physical message to the mobile station；
The mobile station returns to the channel of former serving cell in preset time to detect physical message, then.
Preferably, the normal channel switch step of the mobile station progress is specifically included：
When the base station of the target serving district judges that the signal level value of the switching access request is more than or equal to institute
When stating default change detection requirement level, the base station of the target serving district sends the destination service to the mobile station
The physical message of cell；
The mobile station switches to the letter of the target serving district according to the physical message of the target serving district
Road.
Preferably, the mobile station sends switching access request to the target and taken after the switching command is received
Also include after the step of base station for cell of being engaged in：
The mobile station starts timer, and has detected whether in preset time physical message arrival.
The present invention also proposes a kind of serving cell channel switching control, including base station controller, target serving district
Base station, the base station of former serving cell and mobile station：
The base station controller is used for, when judging to need asynchronised handover, and channel is sent to the base station of target serving district
Activation instruction；After Channel Activation response is received, switching command is sent to the base station of former serving cell；
The base station of the target serving district is used for, and after the Channel Activation instruction is received, is controlled to the base station
The activation response of device Return Channel, and obtain default change detection requirement level；After switching access request is received, institute is judged
Whether the signal level value for stating switching access request is less than the default change detection requirement level；
The base station of the former serving cell is used for, and the switching command that the base station controller is sent is forwarded into movement
Platform；
The mobile station is used for, after the switching command is received, and sends switching access request to the destination service
The base station of cell；Judge the signal level value of the switching access request less than described pre- in the base station of the target serving district
If change detection when requiring level, return to the channel of former serving cell；Judge described in the base station of the target serving district
When the signal level value for switching access request is more than or equal to the default change detection requirement level, normal channel is carried out
Switching.
Preferably, the base station controller is additionally operable to, and the default change detection is required into level is arranged at the letter
In road activation instruction；
Or the base station of the target serving district is additionally operable to, the default change detection is set to require level, and store
In the memory of itself.
Preferably, the base station of the target serving district is additionally operable to, when the signal level for judging the switching access request
When value is less than the default change detection requirement level, refuse to send physical message to the mobile station；
The mobile station is additionally operable to, and physical message is not detected by preset time, then returns to the channel of former serving cell.
Preferably, the base station of the target serving district is additionally operable to, when the signal level for judging the switching access request
When value is more than or equal to the default change detection requirement level, the thing of the target serving district is sent to the mobile station
Manage message；
The mobile station is additionally operable to, according to the physical message of the target serving district, switches to the destination service small
The channel in area.
Preferably, the mobile station is additionally operable to, and starts timer, and detected whether that physical message is arrived in preset time
Reach.
The present invention is when carrying out serving cell channel switching, the signal level value of the switching access request sent to mobile station
Detected, judge whether the multi-upstream access level of mobile station is too low with this, in the multi-upstream access level too low feelings of mobile station
Terminate switching flow under condition, be prevented effectively from because target serving district uplink downlink is uneven and caused by mobile station call drop ask
Topic, it is ensured that the quality of call.
Brief description of the drawings
Fig. 1（a）For the signaling flow graph of handoff failure of the present invention；
Fig. 1（b）The signaling flow graph switched successfully for the present invention；
Fig. 2 is the flow chart of the first embodiment of serving cell channel method for handover control of the present invention；
Fig. 3 is the flow chart of the second embodiment of serving cell channel method for handover control of the present invention；
Fig. 4 is the structural representation of serving cell channel switching control of the present invention.
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Reference picture 1（a）And Fig. 1（b）, Fig. 1（a）For the signaling flow graph of handoff failure of the present invention, Fig. 1（b）For the present invention
The signaling flow graph of handover success.During user's communication, mobile station MS measures the down receiving signal level of serving cell
With down receiving signal quality, while measuring the down receiving signal level of adjacent area, measurement report is obtained；Former serving cell
BTS1 measures MS uplink receiving channel level and uplink receiving signal quality, obtains measurement result.BTS1 is received on MS
The measurement report of report, and the measurement data in measurement report is added in measurement result issues BSC（Base Station
Control System, base station controller）, when BSC receives the measurement result from BTS1, measured according to MS in measurement result
BTS1 down receiving signal level and down receiving signal quality, and adjacent area the information such as down receiving signal level,
Adjudicate whether the MS should initiate channel switching.Each adjacent area down receiving signal level information that BSC is measured according to MS simultaneously, root
According to sort method, then the base station BTS 2 of the final target serving district for determining switching initiates switching flow.
According to switching original base station in service sector BTS1 and switching target serving district base station BTS 2 synchronous situation, Ke Yijin
The switching mode of the type of row 4：Synchronism switching, pre-synchronized handover, pseudo- synchronism switching, asynchronised handover.First three switching type MS
Target cell base station BTS2 TA can be got or calculated from switching command（Timing Advance, time advance
Amount）.The embodiment of the present invention is described in detail primarily directed to asynchronised handover.
As shown in Fig. 2 flow charts of the Fig. 2 for the first embodiment of serving cell channel method for handover control of the present invention.Please
Reference picture 1 in the lump（a）And Fig. 1（b）, the serving cell channel method for handover control that the present embodiment is mentioned, including step：
Step S10, when base station controller BSC judges to need asynchronised handover, base station controller BSC is to target serving district
Base station BTS 2 send Channel Activation instruction；
Step S20, the base station BTS 2 of target serving district is after Channel Activation instruction is received, to base station controller BSC
Return Channel activation response, and obtain default change detection requirement level；
In this step, default change detection requires that level can be arranged at Channel Activation instruction by base station controller BSC
In, it can also be set and be stored in the memory of itself by the base station BTS 2 of target serving district, default change detection will
The value general recommendations of level is asked to be set between -100dBm ~ -90dBm, can also be flexible for each scene according to network optimization experience
Set.The base station BTS 2 of target serving district is corresponding according to Channel Activation instruction activation after Channel Activation instruction is received
Channel, and obtain default change detection requirement level.If default change detection requires that level is by base station controller BSC
Set, base station controller BSC is added to channel before Channel Activation instruction is sent, by default change detection requirement level and swashed
In instruction living, i.e., the field that increase by one includes default change detection requirement level in Channel Activation instruction, then to target
The base station BTS 2 of serving cell sends Channel Activation instruction.If default change detection requires that level is by target serving district
Base station BTS 2 set, then target serving district base station BTS 2 directly is obtained from the memory of itself it is default switching inspection
Survey requires level.
Step S30, base station controller BSC is sent out after Channel Activation response is received to the base station BTS 1 of former serving cell
Send switching command, and switching command is forwarded to mobile station MS by the base station BTS 1 of former serving cell；
After the Channel Activation success of target serving district, base station controller BSC initiates switching flow, hair in former serving cell
Send switching command（HANDOVER COMMAND）To MS.
Step S40, mobile station MS sends switching access request to the base of target serving district after switching command is received
Stand BTS2；
Step S50, the base station BTS 2 of target serving district judges switching access request after switching access request is received
Signal level value whether be less than default change detection require level；If it is, performing step S60；If it is not, then performing
Step S70；
The base station BTS 2 of target serving district detects the signal level of switching command, the level after switching command is received
For MS target serving district multi-upstream access level.If the signal level value of switching command requires level value than change detection
It is small, illustrate that MS multi-upstream access level is too low, target serving district has the unbalanced problem of uplink downlink, it may be possible to due to
Power setting is larger to be caused, and behind target serving district call drop easily occurs for MS accesses, and speech quality can also be affected, in order to keep away
Exempt from this case, switching flow should be terminated in time, MS is still conversed in the channel of former serving cell.Otherwise, MS is carried out
Normal switching flow.
Step S60, mobile station MS returns to the channel of former serving cell；Please with reference to Fig. 1（a）；
Step S70, mobile station MS carries out normal channel switching；Please with reference to Fig. 1（b）.
The present embodiment enters when carrying out serving cell channel switching to the signal level value of the MS switching access requests sent
Row detection, judges whether MS multi-upstream access level is too low with this, terminates and cut in the case where MS multi-upstream access level is too low
Change of current journey, be prevented effectively from because target serving district uplink downlink is uneven and caused by MS Special Handle of Drop Question, it is ensured that call
Quality.
As shown in figure 3, flow charts of the Fig. 3 for the second embodiment of serving cell channel method for handover control of the present invention.This
Embodiment has detected whether physical message arrival to determine whether to carry out based on embodiment illustrated in fig. 2 by mobile station MS
Channel switches, and mainly includes the following steps that：
Also include after step S40：
Step S41, mobile station MS starts timer, and has detected whether in preset time physical message arrival.
Timer herein can select T3124.
Step S60 is specifically included：
Step S61, presets when the base station BTS 2 of target serving district judges that the signal level value of switching access request is less than
Change detection when requiring level, the base station BTS 2 of target serving district is refused to send physical message to mobile station MS；
Step S62, mobile station MS is not detected by physical message in preset time, then returns to the channel of former serving cell.
If the signal level value of switching command requires that level value is small than change detection, illustrate MS multi-upstream access level too
Low, there is the unbalanced problem of uplink downlink in target serving district, and MS accesses easily occur call drop behind target serving district, led to
Words quality can be also affected, and in order to avoid this case, switching flow should be terminated in time, makes MS still in former serving cell
Channel is conversed.
Step S70 is specifically included：
Step S71, when the signal level value of the judgement switching access request of base station BTS 2 of target serving district is more than or waits
When default change detection requires level, the base station BTS 2 of target serving district sends target serving district to mobile station MS
Physical message；
Step S72, mobile station MS switches to the channel of target serving district according to the physical message of target serving district.
If the signal level value of switching access request meets the requirements, target serving district calculates MS TA, and TA is filled out
Enter in physical message, and be sent to MS, MS uses physical message and TA afterwards, carry out normal channel switching, access target letter
Road.
The mobile station MS of the present embodiment has detected whether physical message arrival, if it is not, probably due to destination service
The unbalanced problem of cell uplink downlink, the refusal of base station BTS 2 of target serving district sends physical message, and MS returns to former clothes
Be engaged in cell, be prevented effectively from because switch to the unbalanced target serving district of uplink downlink and caused by call drop.Only connect in switching
When the signal level value for entering request meets the requirements, channel switching is just carried out, it is ensured that speech quality.
As shown in figure 4, Fig. 4 is the structural representation of serving cell channel switching control of the present invention.Please with reference to
Fig. 1, the serving cell channel switching control that the present embodiment is mentioned, including base station controller BSC, the base of target serving district
Stand BTS2, the base station BTS 1 and mobile station MS of former serving cell：
Base station controller BSC is used for, when judging to need asynchronised handover, sends and believes to the base station BTS 2 of target serving district
Road activation instruction；After Channel Activation response is received, switching command is sent to the base station BTS 1 of former serving cell；
The base station BTS 2 of target serving district is used for, and after Channel Activation instruction is received, is returned to base station controller BSC
Channel Activation is responded, and obtains default change detection requirement level；After switching access request is received, switching access is judged
Whether the signal level value of request, which is less than default change detection, requires level；
The base station BTS 1 of former serving cell is used for, and the switching command that base station controller BSC is sent is forwarded into mobile station MS；
Mobile station MS is used for, after switching command is received, and sends switching access request to the base station of target serving district
BTS2；Base station BTS 2 in target serving district judges that the signal level value of switching access request will less than default change detection
When seeking level, the channel of former serving cell is returned；Base station BTS 2 in target serving district judges the signal of switching access request
When level value is more than or equal to default change detection requirement level, normal channel switching is carried out.
In the present embodiment, the base station BTS 2 of target serving district is after Channel Activation instruction is received, according to Channel Activation
The corresponding channel of instruction activation, and obtain default change detection requirement level.After the Channel Activation success of target serving district,
Base station controller BSC initiates switching flow in former serving cell, sends switching command to MS.The base station BTS 2 of target serving district
After switching command is received, the signal level of switching command is detected, the level is multi-upstream access electricity of the MS in target serving district
It is flat.If the signal level value of switching command requires that level value is small than change detection, illustrate that MS multi-upstream access level is too low, mesh
Be present the unbalanced problem of uplink downlink in mark serving cell, may cause because power setting is larger, MS access destination services
Call drop easily occurs after cell, speech quality can be also affected, in order to avoid this case, and switching flow should be terminated in time,
MS is set still to be conversed in the channel of former serving cell.Otherwise, MS carries out normal switching flow.The present embodiment is being taken
During business cell channel switching, the signal level value of the MS switching access requests sent is detected, judges that MS's is up with this
Whether too low access level, switching flow is terminated in the case where MS multi-upstream access level is too low, be prevented effectively from because of target clothes
The MS Special Handle of Drop Question that business cell uplink downlink is uneven and causes, it is ensured that the quality of call.
In the embodiment of the present invention, base station controller BSC is additionally operable to, and default change detection requirement level is arranged at into channel
In activation instruction；Or the base station BTS 2 of target serving district is additionally operable to, default change detection is set to require level, and be stored in
In the memory of itself.
The default change detection of the present embodiment requires that level can be arranged at Channel Activation instruction by base station controller BSC
In, it can also be set and be stored in the memory of itself by the base station BTS 2 of target serving district, default change detection will
The value general recommendations of level is asked to be set between -100dBm ~ -90dBm, can also be flexible for each scene according to network optimization experience
Set.If default change detection requires that level is set by base station controller BSC, base station controller BSC is sending letter
Before road activation instruction, default change detection requirement level is added in Channel Activation instruction, i.e., in Channel Activation instruction
The field that increase by one requires level comprising default change detection, then swash to the transmission channel of base station BTS 2 of target serving district
Instruction living.If default change detection requires that level is set by the base station BTS 2 of target serving district, destination service
The base station BTS 2 of cell directly obtains default change detection from the memory of itself and requires level.
The embodiment of the present invention has detected whether physical message arrival to determine whether to carry out channel especially by mobile station MS
Switching, wherein：
Mobile station MS is additionally operable to, and starts timer, and detected whether in preset time physical message arrival.
The base station BTS 2 of target serving district is additionally operable to, when the signal level value for judging to switch access request is less than default
When change detection requires level, refuse to send physical message to mobile station MS；
Mobile station MS is additionally operable to, and physical message is not detected by preset time, then returns to the channel of former serving cell.
The base station BTS 2 of target serving district is additionally operable to, when the signal level value for judging switching access request is more than or equal to
When default change detection requires level, the physical message of target serving district is sent to mobile station MS；
Mobile station MS is additionally operable to, and according to the physical message of target serving district, switches to the channel of target serving district.
The timer of the present embodiment can select T3124.If the signal level value of switching command requires electricity than change detection
Level values are small, illustrate that MS multi-upstream access level is too low, and target serving district has uplink downlink imbalance, may be due to power
Setting is larger to be caused, and behind target serving district call drop easily occurs for MS accesses, and speech quality can also be affected, in order to avoid this
One situation, switching flow should be terminated in time, MS is still conversed in the channel of former serving cell.If switching access request
Signal level value meet the requirements, target serving district calculates MS TA, and TA is inserted in physical message, and is sent to MS,
MS uses physical message and TA afterwards, carries out normal channel switching, accesses destination channel.The mobile station MS detection of the present embodiment
Whether physical message arrival is had, if it is not, probably due to the unbalanced problem of target serving district uplink downlink, target
The refusal of base station BTS 2 of serving cell sends physical message, and MS returns to former serving cell, is prevented effectively from because switching to up-downgoing chain
The unbalanced target serving district in road and cause call drop.Only when the signal level value for switching access request meets the requirements,
Carry out channel switching, it is ensured that speech quality.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize
Equivalent structure or equivalent flow conversion that description of the invention and accompanying drawing content are made, or directly or indirectly it is used in other correlations
Technical field, be included within the scope of the present invention.
Claims (10)
1. a kind of serving cell channel method for handover control, it is characterised in that including step：
Base station controller is according to the down receiving signal level and down receiving signal quality of the base station of former serving cell, and respectively
Adjacent area down receiving signal level information, it is determined whether channel switching should be initiated and the target serving district of switching is determined
Base station, initiates switching flow；
When base station controller judges to need asynchronised handover, the base station controller sends channel to the base station of target serving district
Activation instruction；
The base station of the target serving district is after the Channel Activation instruction is received, to the base station controller Return Channel
Activation response, and obtain default change detection requirement level；
The base station controller sends switching command after the Channel Activation response is received to the base station of former serving cell,
And the switching command is forwarded to mobile station by the base station of former serving cell；
The mobile station sends switching access request to the base of the target serving district after the switching command is received
Stand；
The base station of the target serving district judges the letter of the switching access request after the switching access request is received
Whether number level value, which is less than the default change detection, requires level；If it is, the mobile station returns to former serving cell
Channel；If it is not, then the mobile station carries out normal channel switching.
2. serving cell channel method for handover control according to claim 1, it is characterised in that the default switching inspection
Survey requires that level is arranged in the Channel Activation instruction by the base station controller, or the base station by the target serving district
Set and be stored in the memory of itself.
3. serving cell channel method for handover control according to claim 2, it is characterised in that the mobile station returns former
The step of channel of serving cell, specifically includes：
When the base station of the target serving district judges that the signal level value of the switching access request is less than described default cut
When changing detection and requiring level, the base station of the target serving district refuses to send physical message to the mobile station；
The mobile station is not detected by physical message in preset time, then returns to the channel of former serving cell.
4. serving cell channel method for handover control according to claim 2, it is characterised in that the mobile station is carried out just
Normal channel switch step is specifically included：
When the base station of the target serving district judges the signal level value of the switching access request more than or equal to described pre-
If change detection when requiring level, the base station of the target serving district sends the target serving district to the mobile station
Physical message；
The mobile station switches to the channel of the target serving district according to the physical message of the target serving district.
5. the serving cell channel method for handover control according to claim 3 or 4, it is characterised in that the mobile station exists
Receive after the switching command, send switching access request to the target serving district base station the step of after also wrap
Include：
The mobile station starts timer, and has detected whether in preset time physical message arrival.
6. a kind of serving cell channel switching control, it is characterised in that the base including base station controller, target serving district
Stand, the base station of former serving cell and mobile station：
The base station controller is used for, according to the down receiving signal level and down receiving signal matter of the base station of former serving cell
Amount, and each adjacent area down receiving signal level information, it is determined whether channel switching should be initiated and the target of switching is determined
The base station of serving cell, initiates switching flow；When judging to need asynchronised handover, channel is sent to the base station of target serving district
Activation instruction；After Channel Activation response is received, switching command is sent to the base station of former serving cell；
The base station of the target serving district is used for, and after the Channel Activation instruction is received, is returned to the base station controller
Channel Activation response is returned, and obtains default change detection and requires level；After switching access request is received, cut described in judgement
Whether the signal level value for changing access request is less than the default change detection requirement level；
The base station of the former serving cell is used for, and the switching command that the base station controller is sent is forwarded into mobile station；
The mobile station is used for, after the switching command is received, and sends switching access request to the target serving district
Base station；Judge the signal level value of the switching access request less than described default in the base station of the target serving district
When change detection requires level, the channel of former serving cell is returned；Judge the switching in the base station of the target serving district
When the signal level value of access request is more than or equal to the default change detection requirement level, carries out normal channel and cut
Change.
7. serving cell channel switching control according to claim 6, it is characterised in that the base station controller is also
For the default change detection to be required into level is arranged in the Channel Activation instruction；
Or the base station of the target serving district is additionally operable to, the default change detection is set to require level, and be stored in certainly
In the memory of body.
8. serving cell channel switching control according to claim 7, it is characterised in that the target serving district
Base station be additionally operable to, require level when the signal level value for judging the switching access request is less than the default change detection
When, refuse to send physical message to the mobile station；
The mobile station is additionally operable to, and physical message is not detected by preset time, then returns to the channel of former serving cell.
9. serving cell channel switching control according to claim 7, it is characterised in that the target serving district
Base station be additionally operable to, when judge it is described switching access request signal level value be more than or equal to the default change detection want
When seeking level, the physical message of the target serving district is sent to the mobile station；
The mobile station is additionally operable to, and according to the physical message of the target serving district, switches to the target serving district
Channel.
10. serving cell channel switching control according to claim 8 or claim 9, it is characterised in that the mobile station is also
For starting timer, and detected whether in preset time physical message arrival.
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| CN201310014333.5A CN103929785B (en) | 2013-01-15 | 2013-01-15 | Serving cell channel method for handover control and device |
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| CN201310014333.5A CN103929785B (en) | 2013-01-15 | 2013-01-15 | Serving cell channel method for handover control and device |
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| CN1281623A (en) * | 1997-12-16 | 2001-01-24 | 艾利森电话股份有限公司 | Handover quality control in mobile communications system |
| EP2378803B1 (en) * | 2008-12-19 | 2017-04-12 | NEC Corporation | Base station, wireless communication system, base station control method, wireless communication method, control program, and mobile station |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI941779A (en) * | 1994-04-15 | 1995-10-16 | Nokia Telecommunications Oy | Handover procedure and arrangement |
| CN102088725B (en) * | 2011-02-23 | 2015-01-21 | 华为技术有限公司 | Uplink power detection method, device and base station equipment |
| CN102655661B (en) * | 2011-03-03 | 2016-01-20 | 中兴通讯股份有限公司 | The method that community switches fast and device |
-
2013
- 2013-01-15 CN CN201310014333.5A patent/CN103929785B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1212113A (en) * | 1996-02-23 | 1999-03-24 | 诺基亚电信公司 | Handover in mobile communication system |
| CN1281623A (en) * | 1997-12-16 | 2001-01-24 | 艾利森电话股份有限公司 | Handover quality control in mobile communications system |
| EP2378803B1 (en) * | 2008-12-19 | 2017-04-12 | NEC Corporation | Base station, wireless communication system, base station control method, wireless communication method, control program, and mobile station |
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| CN103929785A (en) | 2014-07-16 |
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