CN108243465A - A kind of SRVCC switching methods and base station based on load balancing - Google Patents
A kind of SRVCC switching methods and base station based on load balancing Download PDFInfo
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- CN108243465A CN108243465A CN201611228096.2A CN201611228096A CN108243465A CN 108243465 A CN108243465 A CN 108243465A CN 201611228096 A CN201611228096 A CN 201611228096A CN 108243465 A CN108243465 A CN 108243465A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/08—Load balancing or load distribution
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
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Abstract
The present invention discloses a kind of SRVCC switching methods based on load balancing and base station, method include：When the cell excited user number of eNB, which reaches, opens survey thresholding for the SRVCC switchings of load balancing, send RRC connection reconfigurations to the UE of speech business to be accessed and put message；ENB receives UE and reports the measurement result measured to different system adjacent cell；When eNB cell excited user number be more than open survey the sum of thresholding and number of users offset, and the duration be more than preset durations section when, to MME send carry Target Cell Identifier and instruction be switched to based on load balancing SRVCC switching information handover request；MME interacts the circuit domain side resource reservation realized to the UE according to handover request with eMSC；When eNB receives the resource reservation success response of MME returns, switching command is sent to UE, so that UE switches to the Target cell of GSM according to switching command.The method of the present invention can preferably ensure user experience under multi-user scene rationally using idle 2G/3G radio resources.
Description
Technical field
The present invention relates to the communication technologys, and in particular to a kind of SRVCC switching methods and base station based on load balancing.
Background technology
As LTE (Long Term Evolution, long term evolution) network reaches its maturity, VoLTE has been realized in Zhejiang Province
It is comprehensively commercial.VoLTE (Voice over LTE) be it is a kind of by LTE network come when carrying the technical solution of voice and LTE
The final goal of phase voice scheme.Specifically, the radio bearer of voice is provided by LTE network, being provided by EPC (core net) should
The management of carrying is provided the service management of voice by IMS (IP Multimedia Subsystem, IP multimedia subsystem) domain.
In LTE coverage areas, the speech business based on IMS can be provided by LTE network, if but moving out LTE in calling procedure
During coverage area, need to support the interoperability of LTE voices and 2G/3G networks to ensure the continuity of voice, that is, SRVCC/
ESRVCC technologies.
SRVCC (Single Radio Voice Call Continuity) is a kind of VoLTE voices industry that 3GPP is proposed
How business continuous scheme, mainly for solving when injection frequency UE is moved between LTE network and 2G/3G CS networks, ensure
The problem of continuous voice call, that is, ensure VoIP voices that injection frequency UE control in IMS and CS (Circuit Switched,
Circuit switching) taking over seamlessly between voice.
Existing SRVCC switchings are the switchings based on covering, i.e., when carrying out VoLTE callings, eNodeB will be required terminal
Terminal reporting measurement reports, when the signal strength/quality of LTE is less than predetermined threshold, eNodeB initiates handover request to MME
To 2/3G cells.
From the point of view of user experience, VoLTE is with the obvious advantage compared with traditional 2G/3G converses, and is mainly reflected in that VoLTE being capable of band
Come better use feeling and user experience：Voice call quality can be promoted 2 by the introducing of high definition voice and video encoding and decoding
Times or more；The calling access delay of VoLTE is 1-3 seconds, is greatly reduced compared with the 9-12 seconds of CSFB；VoLTE can realize voice
With data service concurrence, data can be carried out while voice communication and upload download.
But under certain Code in Hazardous Special Locations (such as large-scale concert, stadium), at the same online LTE excited user numbers compared with
It is more, although VOLTE speech businesses priority access can occupy a large amount of radio resources, lead to the data service of 4G user to 4G networks
Due to bandwidth deficiency, user's perception is excessively poor, and 23G channel resource relative frees, under utilized.
In such a scenario, LTE network has reached saturation, it is contemplated that part VoLTE user is passed through SRVCC switching modes
It migrates to 2G/3G networks, so as to achieve the purpose that ensure most of user voice data quality of service.But traditional SRVCC
Switching is the different system switching based on covering, and under special screne, user experience be often capacity be limited and and it is non-covered by
Limit, what the signal level of user may be unable to reach different system switching opens survey thresholding, so as to initiate SRVCC switchings, causes
VoLTE calls MOS values are relatively low, and user experience is poor.
Because, it is desirable to provide a kind of SRVCC switching methods based on user load equilibrium, so as to ensure that large-scale place is mostly used
Voice data traffic experience under the scene of family.
Invention content
In view of the above problems, the present invention proposes the one kind for overcoming the above problem or solving the above problems at least partly
SRVCC switching methods and base station based on load balancing.
For this purpose, in a first aspect, the present invention proposes a kind of SRVCC switching methods based on load balancing, including：
When the cell excited user number of eNB, which reaches, opens survey thresholding for the SRVCC switchings of load balancing, to language to be accessed
The UE of sound business sends RRC (Radio ResourceControl, wireless heterogeneous networks) connection reconfiguration and puts message；
The eNB receives the measurement result that the UE is reported, which is to put message according to the RRC connection reconfigurations
Acquisition is measured to different system adjacent cell；
The eNB determines Target Cell Identifier according to the measurement result；
When surveying the sum of thresholding and number of users offset when the cell excited user number of the eNB is more than described open, and continuing
Between when being more than preset durations section, send handover request to MME (mobile management entity), carry target in the handover request
Cell ID and instruction are switched to the information of the SRVCC switchings based on load balancing；So that the MME is according to the handover request
The circuit domain side resource reservation realized to the UE is interacted with eMSC；
When the eNB receives the resource reservation success response of MME returns, sent to the UE from VOLTE and be switched to GSM
The switching life of the Target cell of (Global System for Mobile Communication, global system for mobile communications)
It enables, so that the UE switches to the Target cell of GSM according to the switching command.
Optionally, the SRVCC switchings for load balancing open and survey thresholding, number of users offset, duration are
It is determined beforehand through cell-level page rate in preset time period in SEQ (a kind of Quality management platform of current Huawei)
Voice data handoff parameter under multi-user scene.
Optionally, before sending the step of RRC connection reconfigurations put message to the UE of speech business to be accessed, the method is also
Including：
After the SRVCC switching switches of the eNB are opened, periodic measurement cell excited user number.
Optionally, before the eNB receives the step of measurement result that the UE is reported, the method further includes：
The eNB reception UE put reconfiguring for message transmission according to the RRC connection reconfigurations and complete message.
Second aspect, the present invention provide a kind of SRVCC switching methods based on load balancing, including：
The UE receptions eNB of LTE speech businesses to be accessed reaches in cell excited user number to be cut for the SRVCC of load balancing
It changes the RRC connection reconfigurations for opening and surveying and being sent during thresholding and puts message；
The UE puts message according to the connection reconfiguration and different system adjacent cell is measured, and obtains the survey reported to eNB
Measure result；So that the eNB is more than described open in cell excited user number surveys the sum of thresholding and number of users offset, and persistently when
Between be more than preset durations section when interact according to the measurement result with core-network side network element so that core-network side network element be this
UE carries out circuit domain side resource reservation；
The UE receives the switching command that the eNB is sent, and the switching command receives core-network side net for the eNB
It is sent after the resource reservation success response that member returns；
The UE is linked into the Target cell of GSM according to the switching command.
The third aspect, the present invention provide a kind of SRVCC switching methods based on load balancing, including：
MME receives the handover request that eNB is sent, and the cell excited user number that the handover request is eNB is more than described open
The sum of thresholding and number of users offset are surveyed, and the duration is more than what is sent during preset durations section, carries load balancing
SRVCC indication messages for make UE from VOLTE be switched to GSM Target cell request；
The MME sends the switching demand of SRVCC PS to CS according to handover request to eMSC so that the eMSC according to
The switching demand initiates circuit domain side resource reservation flow；
The MME receives the response of switching demands of the eMSC in the circuit domain side resource reservation success of the UE；
The MME to the eNB send handover request resource reservation success response so that the eNB to UE send from
VOLTE is switched to the switching command of the Target cell of GSM.
Optionally, the method further includes：
The MME receives the message that the switching that the eMSC is sent is completed, and the message that the switching is completed is the eMSC
Sent after interact with target MSC transmission, the target MSC receive after the handoff completion message that the BSS belonging to UE is sent and
EMSC interactions.
Fourth aspect, the present invention provide a kind of base station, including：
Transmitting element opens survey for reaching in the cell excited user number of base station eNB for the SRVCC switchings of load balancing
During thresholding, send RRC connection reconfigurations to the UE of speech business to be accessed and put message；
Receiving unit, for receiving the measurement result that the UE is reported, which is according to the RRC connection reconfigurations
It puts message and acquisition is measured to different system adjacent cell；
Target cell determination unit, for determining Target Cell Identifier according to the measurement result；
The transmitting element, the cell excited user number being additionally operable in the eNB are more than described open and survey thresholding and number of users
The sum of offset, and when the duration is more than preset durations section, sends handover request to MME, take in the handover request
The information of the SRVCC switchings based on load balancing is switched to Target Cell Identifier and instruction；So that the MME is cut according to
It changes request and the circuit domain side resource reservation realized to the UE is interacted with eMSC；
The receiving unit is additionally operable to receive the resource reservation success response of MME returns；
Correspondingly, the transmitting element is additionally operable to send the Target cell for being switched to GSM from VOLTE to the UE and cut
Order is changed, so that the UE switches to the Target cell of GSM according to the switching command.
Optionally, the base station further includes：
Measuring unit, for the SRVCC switching switches of base station unlatching after, periodic measurement cell excited user number.
5th aspect, the present invention provide a kind of user equipment, including：
Receiving unit, for receive eNB cell excited user number reach for load balancing SRVCC switching open survey door
The RRC connection reconfigurations sent in limited time put message；
Measuring unit measures different system adjacent cell for putting message according to the connection reconfiguration, obtains on eNB
The measurement result of report；So that the eNB is more than described open in cell excited user number surveys the sum of thresholding and number of users offset, and
Duration interacts when being more than preset durations section according to the measurement result with core-network side network element so that core-network side net
Member carries out circuit domain side resource reservation for the UE；
Receiving unit, for receiving the switching command that the eNB is sent, the switching command receives core for the eNB
It is sent after the resource reservation success response that heart net side network element returns；
Access unit, for being linked into the Target cell of GSM according to the switching command.
As shown from the above technical solution, SRVCC switching methods and base station proposed by the present invention based on load balancing, pass through
ENB monitors cell excited user number in real time, and when cell excited user number, which reaches SRVCC switchings, opens survey thresholding, adjustment is current
The UE of pre-established call business is switched to GSM from VOLTE, and then under large-scale place multi-user scene, ensure that a large amount of LTE are used
Voice quality and data service bandwidth demand in the case of the voice and packet data concurrent service of family compared with the prior art, can utilize idle 2G/3G
Radio resource, and better ensure that user experience.
Description of the drawings
Fig. 1 is the flow diagram of the SRVCC switching methods based on load balancing that one embodiment of the invention provides；
Fig. 2 is that excited user number and the relationship of cell page-downloading rate are illustrated in cell provided in an embodiment of the present invention
Figure；
Fig. 3 is cell page-downloading rate provided in an embodiment of the present invention and the relation schematic diagram of maximum activation number of users；
Fig. 4 is the signaling diagram of the SRVCC switching methods based on load balancing that another embodiment of the present invention provides；
Fig. 5 and Fig. 6 is respectively the flow for the SRVCC switching methods based on load balancing that another embodiment of the present invention provides
Schematic diagram；
Fig. 7 and Fig. 8 is respectively the structure diagram for the base station that one embodiment of the invention provides；
Fig. 9 is the structure diagram of user equipment that one embodiment of the invention provides.
Specific embodiment
Purpose, technical scheme and advantage to make the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is explicitly described, it is clear that described embodiment be the present invention
Part of the embodiment, instead of all the embodiments.
The method of the embodiment of the present invention is to solve the problems, such as that SRVCC switches under capacity limitation scene.In large-scale place
Under multi-user scene, LTE concurrent user number is more, causes VoLTE speech businesses and data service-aware poor, and 2G/ at this time
3G resources are more idle, can be used to carry a part of voice user.2G Speech comparison VoLTE voices, although having in call experience
It is lost, but ensures the bandwidth demand of 4G user.
Fig. 1 shows the flow diagram for the SRVCC switching methods based on load balancing that one embodiment of the invention provides,
As shown in Figure 1, the method for the present embodiment includes the following steps.
101st, when the SRVCC switchings that the cell excited user number of eNB reaches for load balancing, which are opened, surveys thresholding, to waiting
The UE transmissions RRC connection reconfigurations for entering speech business put message.
It should be noted that after the SRVCC switching switches of the eNB in step 101 are opened, periodic measurement cell activation user
Number.For example, eNB with it is per second be period measurement cell excited user number.
RRC connection reconfigurations in the present embodiment put message put with the RRC connection reconfigurations of the prior art message content it is identical,
Such as include measurement configuration information, the present embodiment is not limited thereof.
It after UE receptions RRC connection reconfigurations put message, is attached and reconfigures, weight can be sent to eNB after the completion of reconfiguring
Message is completed in configuration.
102nd, eNB receives the measurement result that the UE is reported, which is to put message according to the RRC connection reconfigurations
Acquisition is measured to different system adjacent cell.
Different system in the step can be the system of current 2G/3G, such as GSM network.
103rd, eNB determines Target Cell Identifier according to the measurement result.
104th, the sum of thresholding and number of users offset are surveyed, and hold when the cell excited user number of the eNB is more than described open
When the continuous time is more than preset durations section, handover request is sent to MME, carried in the handover request Target Cell Identifier and
Indicate to be switched to the information of the SRVCC switchings based on load balancing；So that the MME is interacted according to the handover request with eMSC
Realize the circuit domain side resource reservation to the UE.
105th, it when eNB receives the resource reservation success response of MME returns, is sent to the UE from VOLTE and is switched to GSM
Target cell switching command so that the UE switches to the Target cell of GSM according to the switching command.
In the present embodiment, to solve the voice data traffic experience under the multi-user scene of large-scale place, by under the LTE pages
The association analysis of rate and maximum activation number of users is carried, determines excited user number thresholding when user data service perceives poor,
Survey thresholding is opened, and then design the SRVCC switching methods based on load balancing, and then in large-scale place as different-system switching method
Under multi-user scene, it ensure that voice quality and data service demand for loan under a large amount of LTE user concurrents service conditions, compare
The prior art can better ensure that user experience rationally using idle 2G/3G radio resources.
It illustrates, it is inclined that survey thresholding, number of users are opened in the SRVCC switchings for load balancing referred in above-mentioned Fig. 1
Shifting amount, duration are beforehand through under the multi-user scene that cell-level page rate determines in preset time period in SEQ
Voice data handoff parameter.
Open that survey thresholding, number of users offset, the acquisition of duration detailed as follows for the SRVCC switchings for load balancing
It describes in detail bright.
First, the association of LTE page-downloadings rate and maximum activation number of users is described as follows.
LTE community users are perceived suffers from substantial connection with maximum activation number of users in cell.Web browsing business conduct
The highest business of user's permeability, the height of Webpage downloading rate directly affect the service-aware experience of user.Therefore,
There is practical significance using page-downloading rate as load balancing startup threshold.Page-downloading rate as described below with it is small
The relationship of number of users in area.
Cell-level page-downloading rate, statistics the whole province on March 18 high-speed rail cell whole day hour grade speed are extracted from SEQ platforms
Rate, altogether 6164 valid data；Maximum activation number of users and cell page-downloading Rate Relationship are counted, as shown in Figure 2.
Statistical data according to fig. 2 between the page-downloading rate of cell and maximum activation number of users it is found that be presented inverse ratio
Example relationship.I.e. as maximum activation number of users increases, downward trend, current area excited user number area is presented in page-downloading rate
Between in 300-400, rate be less than 500Kbps, be 434.34kbps.
When maximum activation number of users is in 200-300, cell is averaged page downloading rate close to 500kbps.In order to true
Determine the thresholding of cell maximum activation number, need to carry out page-downloading rate of user's number interval in [200,300] further
Statistical analysis, statistic analysis result as shown in Figure 3.
When maximum activation number of users is in 250-260 in cell, cell page-downloading rate is close to 500kbps.Therefore,
The number of users thresholding that VoLTE call migrations are SRVCC patterns can be preset and (open survey for the SRVCC of load balancing switchings
Thresholding) can be 250.
Secondly, the related network elements adjustment explanation when SRVCC based on load balancing switches.
If eNB needs to support the SRVCC switching methods based on load balancing, switch Inter RATMlb HO need to be designed
Switch is used to open such switching method；After the switch is opened, eNB is with per second for period measurement cell excited user number.
If meeting the following conditions in the second in continuous T ime to Trigger (Inter RATMlb Time To Trig),
Trigger the SRVCC handover measurements based on load balancing：
Cell excited user number>Inter RATMlb UE Num Thd+Inter RATMlb UE Num Offset
At this in SRVCC switching methods based on load balancing, Inter RATMlb Time To Trig are born for different system
Carry the balanced triggering duration；Inter RATMlb UE Num Thd are different system load balancing excited user number thresholding,
Inter RATMlb UE Num Offset are different system load balancing excited user number offset, according under the cell LTE pages
Rate is carried with the association analysis of maximum activation number of users as a result, by each threshold value setting such as following table one：
Table one
| Parameter name | Parameter meaning | Recommended value |
| InterRATMlbHOSwitch | Different system load balancing switching switch | ON |
| InterRATMlbTimeToTrig | Different system load balancing triggers the duration | 5s |
| InterRATMlbUENumThd | Different system load balancing excited user number thresholding | 250 |
| InterRATMlbUENumOffset | Different system load balancing excited user number offset | 20 |
In the embodiment of the present invention, the different system switching of SRVCC hand off signaling flow and data service based on load balancing
Signaling process is basically identical, and process description is as shown in Figure 4.
Fig. 4 shows the signaling diagram for the SRVCC switching methods based on load balancing that another embodiment of the present invention provides, such as
Shown in Fig. 4, the method for the present embodiment is as described below.
400th, after the SRVCC switching switches of eNB are opened, periodic measurement cell excited user number.
401st, when the cell excited user number of eNB, which reaches, opens survey thresholding for the SRVCC switchings of load balancing, triggering is negative
It carries balanced SRVCC switchings and opens survey thresholding, sending RRC connection reconfigurations to the UE of speech business to be accessed puts message.
The RRC connection reconfigurations of the present embodiment put message and include measurement configuration information.
402nd, UE puts to eNodeB replies RRC connection reconfigurations after the completion of reconfiguring and completes message.
403rd, the eNodeB that UE is put according to RRC connection reconfigurations in message is indicated, different system adjacent cell is measured, and on
Report measurement result.
404th, eNodeB determines Target Cell Identifier according to measurement result.
405th, thresholding and number of users offset are surveyed when the cell excited user number that eNodeB is periodically detected is more than described open
The sum of, and the duration be more than preset durations section when, to MME send handover request (Handover Required).
That is, when cell excited user number>Inter RATMlb UE Num Thd+Inter RATMlb UE Num
During Offset, and the duration is more than Inter RATMlb Time To Trig, eNodeB and sends Handover to MME
Required message carries Target cell ID in message, and passes through SRVCC HO Indication and indicate that this is switched to based on negative
Carry balanced SRVCC switchings.
406th, MME sends switching demand (the SRVCC PS to CS of SRVCC PS to CS according to handover request to eMSC
Request), eMSC to be notified to initiate circuit domain side resource reservation flow.
407th, eMSC is interacted according to switching demand with the wireless access network (Target RAN) of 2G, is embodied as the UE and is reserved electricity
Road domain side resource, such as interface-free resources and core network link resource.
408th, eMSC returns to SRVCC PS to CS Response (i.e. resource reservation success response) to MME, notifies MME
Resource reservation result.
409th, MME sends handover information according to resource reservation result to eNodeB.
410th, eNodeB sends switching command to UE, and notice UE is switched to the Target cell of GSM from VOLTE.
411st, UE accesses to the Target cell of GSM according to switching command.
It will be appreciated that after UE access success, the BSS of GSM sends Handover Complete message, warp to target MSC
Notice MME switchings are completed after crossing eMSC.
That is, MME receives the message that the switching that the eMSC is sent is completed, the message that the switching is completed is described
What eMSC was sent after being interacted with target MSC transmission, the target MSC receives the handoff completion message that the BSS belonging to UE is sent
It is interacted afterwards with eMSC.
The method of the present embodiment, by eNB to cell excited user number cycle monitoring, when cell excited user number reaches
When survey thresholding is opened in SRVCC switchings, the UE for adjusting current pre-established call business is switched to GSM, and then in large-scale place from VOLTE
Under multi-user scene, voice quality and data service bandwidth demand under a large amount of LTE user concurrents service conditions ensure that, it is more existing
Technology is compared, and can utilize idle 2G/3G radio resources, and better ensure that user experience.
Fig. 5 shows the flow chart for the SRVCC switching methods based on load balancing that another embodiment of the present invention provides, such as
Shown in Fig. 5, the method for the present embodiment is as described below.
501st, the UE of LTE speech businesses to be accessed receives eNB and reaches in cell excited user number for load balancing
SRVCC switchings open the RRC connection reconfigurations surveyed and sent during thresholding and put message.
502nd, UE puts message according to the connection reconfiguration and different system adjacent cell is measured, and obtains the survey reported to eNB
Measure result；So that the eNB is more than described open in cell excited user number surveys the sum of thresholding and number of users offset, and persistently when
Between be more than preset durations section when interact according to the measurement result with core-network side network element so that core-network side network element be this
UE carries out circuit domain side resource reservation.
503rd, UE receives the switching command that the eNB is sent, and the switching command receives core-network side net for the eNB
It is sent after the resource reservation success response that member returns.
504th, UE is linked into the Target cell of GSM according to the switching command.
The method of the present embodiment monitors cell excited user number by eNB in real time, when cell excited user number reaches
When survey thresholding is opened in SRVCC switchings, being interacted with UE so that the UE of the current pre-established call business of adjustment is switched to GSM from VOLTE,
And then under large-scale place multi-user scene, voice quality and data service under a large amount of LTE user concurrents service conditions ensure that
Bandwidth demand compared with the prior art, can utilize idle 2G/3G radio resources, and better ensure that user experience.
Fig. 6 shows the flow chart for the SRVCC switching methods based on load balancing that another embodiment of the present invention provides, such as
Shown in Fig. 6, the method for the present embodiment is as described below.
601st, MME receives the handover request that eNB is sent, and the handover request is more than institute for the cell excited user number of eNB
It states to open and surveys the sum of thresholding and number of users offset, and the duration is more than what is sent during preset durations section, carries load
The Target cell for being used to make UE to be switched to GSM from VOLTE of balanced SRVCC indication messages is asked.
602nd, MME sends the switching demand of SRVCC PS to CS according to handover request to eMSC so that the eMSC according to
The switching demand initiates circuit domain side resource reservation flow.
603rd, MME receives the response of switching demands of the eMSC in the circuit domain side resource reservation success of the UE.
604th, MME to the eNB send handover request resource reservation success response so that the eNB to UE send from
VOLTE is switched to the switching command of the Target cell of GSM.
Optionally, the above method further includes following steps 605 being not shown in figure.
605th, MME receives the message that the switching that the eMSC is sent is completed, and the message that the switching is completed is the eMSC
Sent after interact with target MSC transmission, the target MSC receive after the handoff completion message that the BSS belonging to UE is sent and
EMSC interactions.
The method of the present embodiment monitors cell excited user number by eNB in real time, when cell excited user number reaches
When survey thresholding is opened in SRVCC switchings, being interacted with UE so that the UE of the current pre-established call business of adjustment is switched to GSM from VOLTE,
It ensure that the voice quality of UE and data service bandwidth demand, compared with the prior art, idle 2G/3G can be utilized wirelessly to provide
Source, and better ensure that user experience.
Fig. 7 shows the structure diagram for the base station that another embodiment of the present invention provides, as shown in fig. 7, the present embodiment
Base station includes：Transmitting element 71, receiving unit 72, Target cell determination unit 73；
Wherein, transmitting element 71 is used to reach in the cell excited user number of base station eNB and be cut for the SRVCC of load balancing
Change open survey thresholding when, to speech business to be accessed UE send RRC connection reconfigurations put message；
For receiving unit 72 for receiving the measurement result that the UE is reported, which is according to RRC connections weight
Configuration message measures acquisition to different system adjacent cell；
Target cell determination unit 73 is used to determine Target Cell Identifier according to the measurement result；
The transmitting element 71 is additionally operable to survey thresholding and number of users more than described open in the cell excited user number of the eNB
The sum of offset, and when the duration is more than preset durations section, sends handover request to MME, take in the handover request
The information of the SRVCC switchings based on load balancing is switched to Target Cell Identifier and instruction；So that the MME is cut according to
It changes request and the circuit domain side resource reservation realized to the UE is interacted with eMSC；
The receiving unit 72 is additionally operable to receive the resource reservation success response of MME returns；
Correspondingly, the transmitting element 71 is additionally operable to be switched to cutting for the Target cell of GSM to UE transmissions from VOLTE
Order is changed, so that the UE switches to the Target cell of GSM according to the switching command.
Optionally, above-mentioned base station shown in Fig. 7 further includes the measuring unit being not shown in figure, which is used in base
After the SRVCC switching switches stood are opened, periodic measurement cell excited user number.
The base station performs above-mentioned Fig. 1, method shown in Fig. 4, is no longer described in detail referring to foregoing description, at this.
The base station of the present embodiment can be applicable under large-scale place multi-user scene, it is ensured that a large amount of LTE user concurrent business
In the case of voice quality and data service bandwidth demand, compared with the prior art, idle 2G/3G radio resources can be utilized,
And better ensure that user experience.
Fig. 8 shows the structure diagram for the base station that another embodiment of the present invention provides, as shown in figure 8, the present embodiment
Base station includes：Processor (processor) 81, memory (memory) 82, communication interface (Communications
Interface) 83 and bus 84；
Wherein, the processor 81, memory 82, communication interface 83 complete mutual communication by the bus 84；
The communication interface 83 is for the information transmission between the base station and other communication equipments；
The processor 81 is used to call the program instruction in the memory 82, to perform above-mentioned each method embodiment institute
The method of offer, such as including：When the cell excited user number of eNB reaches survey thresholding is opened for the SRVCC switchings of load balancing
When, it sends RRC connection reconfigurations to the UE of speech business to be accessed and puts message；
The eNB receives the measurement result that the UE is reported, which is to put message according to the RRC connection reconfigurations
Acquisition is measured to different system adjacent cell；
The eNB determines Target Cell Identifier according to the measurement result；
When surveying the sum of thresholding and number of users offset when the cell excited user number of the eNB is more than described open, and continuing
Between when being more than preset durations section, send handover request to MME, Target Cell Identifier and instruction carried in the handover request
It is switched to the information of the SRVCC switchings based on load balancing；So that the MME interacts realization with eMSC according to the handover request
To the circuit domain side resource reservation of the UE；
When the eNB receives the resource reservation success response of MME returns, sent to the UE from VOLTE and be switched to GSM
Target cell switching command so that the UE switches to the Target cell of GSM according to the switching command.
Processor at this is additionally operable to perform above-mentioned Fig. 1, method and step shown in Fig. 4, referring to foregoing description, at this no longer
It is described in detail.
The base station of the present embodiment can be applicable under large-scale place multi-user scene, it is ensured that a large amount of LTE user concurrent business
In the case of voice quality and data service bandwidth demand, compared with the prior art, idle 2G/3G radio resources can be utilized,
And better ensure that user experience.
Fig. 9 shows the structure diagram for the user equipment that another embodiment of the present invention provides, as shown in figure 9, this implementation
The user equipment of example includes：Receiving unit 91, measuring unit 92, access unit 93；
Wherein, receiving unit 91 reaches the SRVCC switchings for load balancing for receiving eNB in cell excited user number
It opens the RRC connection reconfigurations surveyed and sent during thresholding and puts message；
Measuring unit 92 measures different system adjacent cell for putting message according to the connection reconfiguration, obtains to eNB
The measurement result reported；So that the eNB is more than described open in cell excited user number surveys the sum of thresholding and number of users offset,
And the duration be more than preset durations section when interacted according to the measurement result with core-network side network element so that core-network side
Network element carries out circuit domain side resource reservation for the UE；
Receiving unit 91 is used to receive the switching command that the eNB is sent, and the switching command receives core for the eNB
It is sent after the resource reservation success response that heart net side network element returns；
Access unit 93 is used to be linked into the Target cell of GSM according to the switching command.
The user equipment of the present embodiment can perform the step of above-mentioned Fig. 4 and method shown in fig. 5, should referring to foregoing description
Place is no longer described in detail.
The user equipment of the present embodiment interacts, and then reached in eNB under large-scale place multi-user scene with above-mentioned eNB
To when opening survey thresholding, the network of GSM is switched to, thus, it is ensured that voice quality sum number under a large amount of LTE user concurrent service conditions
According to service bandwidth demand, compared with the prior art, idle 2G/3G radio resources can be utilized, and better ensure that user's body
It tests.
Certainly, the user device architecture of another aspect of the present invention can be as shown in figure 8, at this point, the processor be used to call
Program instruction in the memory, to perform the method that above-mentioned each method embodiment is provided, such as including：LTE to be accessed
The UE of speech business receives eNB and is sent when cell excited user number reaches and opens for the SRVCC switchings of load balancing and survey thresholding
RRC connection reconfigurations put message；
The UE puts message according to the connection reconfiguration and different system adjacent cell is measured, and obtains the survey reported to eNB
Measure result；So that the eNB is more than described open in cell excited user number surveys the sum of thresholding and number of users offset, and persistently when
Between be more than preset durations section when interact according to the measurement result with core-network side network element so that core-network side network element be this
UE carries out circuit domain side resource reservation；
The UE receives the switching command that the eNB is sent, and the switching command receives core-network side net for the eNB
It is sent after the resource reservation success response that member returns；
The UE is linked into the Target cell of GSM according to the switching command.
The user equipment of the present embodiment interacts, and then reached in eNB under large-scale place multi-user scene with above-mentioned eNB
To when opening survey thresholding, the network of GSM is switched to, thus, it is ensured that voice quality sum number under a large amount of LTE user concurrent service conditions
According to service bandwidth demand, compared with the prior art, idle 2G/3G radio resources can be utilized, and better ensure that user's body
It tests.
It will be appreciated by those of skill in the art that although some embodiments described herein include being wrapped in other embodiments
The certain features rather than other feature included, but the combination of the feature of different embodiment mean in the scope of the present invention it
It is interior and form different embodiments.
It will be understood by those skilled in the art that each step in embodiment can with hardware realization or at one or
The software module run on the multiple processors of person is realized or is realized with combination thereof.Those skilled in the art should manage
Solution, can realize according to embodiments of the present invention one using microprocessor or digital signal processor (DSP) in practice
The some or all functions of a little or whole components.The present invention is also implemented as performing method as described herein
Some or all equipment or program of device (for example, computer program and computer program product).
Although being described in conjunction with the accompanying embodiments of the present invention, those skilled in the art can not depart from this hair
Various modifications and variations are made in the case of bright spirit and scope, such modifications and variations are each fallen within by appended claims
Within limited range.
Claims (10)
1. a kind of SRVCC switching methods based on load balancing, which is characterized in that including：
When the cell excited user number of eNB, which reaches, opens survey thresholding for the SRVCC switchings of load balancing, to voice industry to be accessed
The UE of business sends RRC connection reconfigurations and puts message；
The eNB receives the measurement result that the UE is reported, which is to put message to different according to the RRC connection reconfigurations
System adjacent cell measures acquisition；
The eNB determines Target Cell Identifier according to the measurement result；
The sum of thresholding and number of users offset are surveyed, and the duration is big when the cell excited user number of the eNB is more than described open
When preset durations section, handover request is sent to MME, Target Cell Identifier is carried in the handover request and instruction switches
Information for the SRVCC switchings based on load balancing；So that the MME interacts realization according to the handover request to this with eMSC
The circuit domain side resource reservation of UE；
When the eNB receives the resource reservation success response of MME returns, the mesh that GSM is switched to from VOLTE is sent to the UE
The switching command of cell is marked, so that the UE switches to the Target cell of GSM according to the switching command.
2. according to the method described in claim 1, it is characterized in that, the SRVCC switchings for load balancing open survey thresholding,
Number of users offset, duration are beforehand through the multi-user that cell-level page rate determines in preset time period in SEQ
Voice data handoff parameter under scene.
3. according to the method described in claim 1, it is characterized in that, send RRC connection reconfigurations to the UE of speech business to be accessed
Before the step of putting message, the method further includes：
After the SRVCC switching switches of the eNB are opened, periodic measurement cell excited user number.
4. according to the method described in claim 1, it is characterized in that, the eNB receives the step of measurement result that the UE is reported
Before rapid, the method further includes：
The eNB reception UE put reconfiguring for message transmission according to the RRC connection reconfigurations and complete message.
5. a kind of SRVCC switching methods based on load balancing, which is characterized in that including：
The UE reception eNB of LTE speech businesses to be accessed reach in cell excited user number to be opened for the SRVCC switchings of load balancing
It surveys the RRC connection reconfigurations sent during thresholding and puts message；
The UE puts message according to the connection reconfiguration and different system adjacent cell is measured, and obtains the measurement knot reported to eNB
Fruit；So that the eNB is more than described open in cell excited user number surveys the sum of thresholding and number of users offset, and the duration is big
Interacted when preset durations section according to the measurement result with core-network side network element so that core-network side network element for the UE into
Row circuit domain side resource reservation；
The UE receives the switching command that the eNB is sent, and the switching command receives core-network side network element for the eNB and returns
It is sent after the resource reservation success response returned；
The UE is linked into the Target cell of GSM according to the switching command.
6. a kind of SRVCC switching methods based on load balancing, which is characterized in that including：
MME receive eNB send handover request, the handover request be eNB cell excited user number be more than open survey thresholding with
The sum of number of users offset, and when duration is more than preset durations section send, the SRVCC for carrying load balancing cuts
Change the Target cell request for being used to make UE to be switched to GSM from VOLTE of instruction information；
The MME sends the switching demand of SRVCC PS to CS according to handover request to eMSC, so that the eMSC is according to
Switching demand initiates circuit domain side resource reservation flow；
The MME receives the response of switching demands of the eMSC in the circuit domain side resource reservation success of the UE；
The MME sends the resource reservation success response of handover request to the eNB, so that the eNB is sent to UE from VOLTE
It is switched to the switching command of the Target cell of GSM.
7. according to the method described in claim 6, it is characterized in that, the method further includes：
The MME receives the message that the switching that the eMSC is sent is completed, and the message that the switching is completed is the eMSC and mesh
Mark MSC is sent after sending interaction, the target MSC receive after the handoff completion message that the BSS belonging to UE is sent with eMSC
Interactive.
8. a kind of base station, which is characterized in that including：
Transmitting element opens survey thresholding for reaching in the cell excited user number of base station eNB for the SRVCC switchings of load balancing
When, it sends RRC connection reconfigurations to the UE of speech business to be accessed and puts message；
Receiving unit, for receiving the measurement result that the UE is reported, which disappears to be put according to the RRC connection reconfigurations
Breath measures acquisition to different system adjacent cell；
Target cell determination unit, for determining Target Cell Identifier according to the measurement result；
The transmitting element, the cell excited user number being additionally operable in the eNB are more than described open and survey thresholding and number of users offset
The sum of amount, and when the duration is more than preset durations section, sends handover request to MME, carry mesh in the handover request
Mark cell ID and instruction are switched to the information of the SRVCC switchings based on load balancing；So that the MME please according to the switching
Seek the circuit domain side resource reservation for interacting and being realized to the UE with eMSC；
The receiving unit is additionally operable to receive the resource reservation success response of MME returns；
Correspondingly, the transmitting element, the switching for being additionally operable to send from the VOLTE Target cells for being switched to GSM to the UE are ordered
It enables, so that the UE switches to the Target cell of GSM according to the switching command.
9. base station according to claim 8, which is characterized in that the base station further includes：
Measuring unit, for the SRVCC switching switches of base station unlatching after, periodic measurement cell excited user number.
10. a kind of user equipment, which is characterized in that including：
Receiving unit, for receiving eNB when cell excited user number reaches and opens survey thresholding for the SRVCC switchings of load balancing
The RRC connection reconfigurations of transmission put message；
Measuring unit measures different system adjacent cell for putting message according to the connection reconfiguration, obtains what is reported to eNB
Measurement result；So that the eNB is more than described open in cell excited user number surveys the sum of thresholding and number of users offset, and continue
Time interacts when being more than preset durations section according to the measurement result with core-network side network element so that core-network side network element is
The UE carries out circuit domain side resource reservation；
The receiving unit is additionally operable to receive the switching command that the eNB is sent, and the switching command is received for the eNB
It is sent after the resource reservation success response that core-network side network element returns；
Access unit, for being linked into the Target cell of GSM according to the switching command.
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