CN104284344B - Dispositions method, system and the dual-mode terminal of isolated island Formula V oLTE - Google Patents
Dispositions method, system and the dual-mode terminal of isolated island Formula V oLTE Download PDFInfo
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- CN104284344B CN104284344B CN201310276538.0A CN201310276538A CN104284344B CN 104284344 B CN104284344 B CN 104284344B CN 201310276538 A CN201310276538 A CN 201310276538A CN 104284344 B CN104284344 B CN 104284344B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/18—Network planning tools
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
Abstract
This disclosure relates to a kind of dispositions method, system and the dual-mode terminal of isolated island Formula V oLTE.This method includes dual-mode terminal in LTE network and overlapping covered interior signal of the reception from LTE and 2G/3G networks at the same time of 2G/3G networks；The audio call initiated in response to dual-mode terminal, receives the information that the base station that dual-mode terminal is currently located in LTE network is sent；Detection dual-mode terminal present position and the loopback delay being currently located between the base station in LTE network；By the loopback delay between dual-mode terminal present position and the base station being currently located in LTE network compared with loopback delay thresholding；If the loopback delay of actual measurement is less than loopback delay thresholding, dual-mode terminal based on VoLTE by call setup on an LTE network, otherwise dual-mode terminal by call setup on 2G/3G networks.The disclosure can ensure relatively low cutting off rate in the case where switching without different system.
Description
Technical field
This disclosure relates to mobile communication, especially, is related to a kind of isolated island Formula V oLTE（Voice over LTE, LTE voices
Service）Dispositions method, system and dual-mode terminal.
Background technology
LTE（Long Term Evolution, Long Term Evolution）It is the UMTS organized to set up by 3GPP（Universal
Mobile Telecommunication System, Universal Mobile Communication System）The Long Term Evolution of technical standard.VoLTE be by
The voice service system with service quality guarantee that LTE network provides.
In networking the whole network covering is not implemented initial stage in LTE network, is only the covering of limited range；And current 2G/3G nets
Network, for example, GSM（Global System for Mobile communications, global system for mobile communications）、WCDMA
（Wideband Code Division Multiple Access, width CDMA）、CDMA（Code Division
Multiple Access, CDMA）Covering Deng network formats is then the whole network covering.Therefore, from coverage, LTE
The covering of network is only the interior section of the 2G/3G network coverages, as shown in Figure 1, the corresponding covering of outmost dark elliptic
Region is the area of coverage of 2G/3G networks, its oval corresponding overlay area of internal light color is the overlay area of LTE network.
It is superimposed in this LTE network and 2G/3G networks in the network to be formed, i.e. the oval corresponding area of coverage of light color in Fig. 1
Domain could receive the service of the two networks offer, it is necessary to using the dual-mode terminal for supporting 2G/3G technologies and LTE technologies at the same time.
When the whole network covering is not implemented in LTE technologies, during in order to keep VoLTE to be moved from the LTE areas of coverage to the non-LTE areas of coverage
Continuity, traditional VoLTE deployment schemes are that the switching of cross-system, such as Fig. 2 are carried out in LTE network edge and 2G/3G networks
Shown, when user establishes VoLTE audio calls in the lte networks, user when moving outside the LTE areas of coverage to needing LTE nets
Network and 2G/3G networks start SRVCC jointly（Single Radio Voice Call Continuity, double-mode single-standby is wireless language
Voice call continuity）Handover mechanism, voice is switched on 2G/3G networks from LTE network, so as to ensure that audio call does not fall
Words.The audio call established if SRVCC technologies are not used at LTE network edge is very easy to call drop.
Due to needing to carry out Signalling exchange between two nets when switching to 2G/3G networks from LTE network, and need LTE base station
In have 2G/3G network base stations neighboring cell list, and need dual-mode terminal can communication while according to network signal into
The web search of the different system of row, therefore cause terminal extremely complex with the network equipment.Therefore, existing SRVCC technologies are caused
There are following technical problem：
（1）Network and terminal are extremely complex so that this different system switching application effect is uncertain；
（2）Terminal complexity greatly improves, and will influence the abundant of terminal price and species；
（3）Above-mentioned reason is difficult to dispose VoLTE technologies when causing the non-the whole networks of LTE to cover.
The content of the invention
The disclosure is in view of at least one in problem above proposes new technical solution.
The disclosure provides a kind of dispositions method of isolated island Formula V oLTE in terms of one, it cuts without different system
It can ensure relatively low cutting off rate in the case of changing.
The disclosure provides a kind of dual-mode terminal in its another aspect, it can in the case where switching without different system
Ensure relatively low cutting off rate.
The disclosure provides a kind of deployment system of isolated island Formula V oLTE at its another aspect, it cuts without different system
It can ensure relatively low cutting off rate in the case of changing.
According to the disclosure, there is provided a kind of dispositions method of isolated island Formula V oLTE, including：
Dual-mode terminal is in LTE network and overlapping covered interior signal of the reception from LTE network at the same time of 2G/3G networks
With the signal from 2G/3G networks；
The audio call initiated in response to dual-mode terminal, receives the base station that dual-mode terminal is currently located in LTE network and sends
Information, the information that the base station in LTE network is sent includes loopback delay thresholding, loopback delay thresholding and the current institute of dual-mode terminal
Position relationship between the coverage and protection band of sector in the lte networks is related, and protection band is LTE network and 2G/3G
The region of the overlapping covered edge setting width of overlapping covered middle-range of network；
Detection dual-mode terminal present position and the loopback delay being currently located between the base station in LTE network；
During by dual-mode terminal present position and the loopback delay and loopback that are currently located between the base station in LTE network
Prolong thresholding to be compared；
If dual-mode terminal present position and the loopback delay being currently located between the base station in LTE network are less than ring
Return time delay thresholding, then dual-mode terminal be based on VoLTE by call setup on an LTE network, otherwise dual-mode terminal exists call setup
On 2G/3G networks.
In some embodiments of the present disclosure, the coverage portion of the sector in LTE network is currently located in dual-mode terminal
When dividing ground within protection band, sent according to the base station that the cutting off rate of setting adjustment dual-mode terminal is currently located in LTE network
Loopback delay thresholding.
In some embodiments of the present disclosure, it is current that dual-mode terminal is detected by established data link or access procedure
Position and the loopback delay being currently located between the base station in LTE network.
In some embodiments of the present disclosure, the information that the base station in LTE network is sent further includes the current institute of dual-mode terminal
Whether the coverage of sector in the lte networks is completely within protection band, and method further includes：
Whether the coverage for the sector being currently located according to the dual-mode terminal of reception in LTE network is completely in protection band
Within information determine dual-mode terminal initiate calling mode；
If be completely within protection band, dual-mode terminal be based on VoLTE by call setup on an LTE network, otherwise,
Determine that dual-mode terminal is according to dual-mode terminal present position and the loopback delay being currently located between the base station in LTE network
No support VoLTE rises and exhales.
In some embodiments of the present disclosure, the width of protection band is related to the average call duration in network index.
In some embodiments of the present disclosure, the average call duration in network index is longer, and the width of protection band is wider.
In some embodiments of the present disclosure, it is system that dual-mode terminal, which is currently located the information that base station in LTE network is sent,
Message, broadcast singal, multicast signals or short message.
According to the disclosure, a kind of dual-mode terminal is additionally provided, including：
Network signal receiving unit, for being come from LTE network and overlapping covered interior receive at the same time of 2G/3G networks
The signal of LTE network and the signal from 2G/3G networks；
Loopback delay thresholding receiving unit, for the audio call initiated in response to dual-mode terminal, receives dual-mode terminal and works as
The information that preceding base station in the lte networks is sent, the information that the base station in LTE network is sent include loopback delay thresholding, ring
Return the position relationship phase that time delay thresholding is currently located with dual-mode terminal between the coverage and protection band of the sector in LTE network
Close, protection band sets the area of width for the overlapping covered edge of overlapping covered middle-range of LTE network and 2G/3G networks
Domain；
Loopback delay detection unit, for the base for detecting dual-mode terminal present position Yu being currently located in LTE network
Loopback delay between standing；
Loopback delay comparing unit, for by dual-mode terminal present position and the base station that is currently located in LTE network
Between loopback delay compared with loopback delay thresholding；
Call setup unit, if for dual-mode terminal present position and the base station that is currently located in LTE network it
Between loopback delay be less than loopback delay thresholding, then based on VoLTE by call setup on an LTE network, otherwise by call setup
On 2G/3G networks.
In some embodiments of the present disclosure, loopback delay detection unit passes through established data link or access procedure
Detection dual-mode terminal present position and the loopback delay being currently located between the base station in LTE network.
In some embodiments of the present disclosure, the information that the base station in LTE network is sent further includes the current institute of dual-mode terminal
Whether the coverage of sector in the lte networks is completely within protection band, and dual-mode terminal further includes：
Method of calling determination unit, for the covering for the sector being currently located according to the dual-mode terminal of reception in LTE network
The information whether scope is completely within protection band determines that dual-mode terminal initiates the mode of calling, if being completely in protection band
Within, then based on VoLTE by call setup on an LTE network, otherwise, according to dual-mode terminal present position with being currently located
The loopback delay between base station in LTE network determines whether dual-mode terminal supports VoLTE rises to exhale.
In some embodiments of the present disclosure, the width of protection band is related to the average call duration in network index.
In some embodiments of the present disclosure, the average call duration in network index is longer, and the width of protection band is wider.
According to the disclosure, a kind of deployment system of isolated island Formula V oLTE, including LTE network side apparatus, 2G/3G are additionally provided
Dual-mode terminal in network side equipment and previous embodiment.
In some embodiments of the present disclosure, the coverage portion of the sector in LTE network is currently located in dual-mode terminal
When dividing ground within protection band, LTE network side apparatus adjusts dual-mode terminal according to the cutting off rate of setting and is currently located LTE network
In base station send loopback delay thresholding.
In some embodiments of the present disclosure, it is system that dual-mode terminal, which is currently located the information that base station in LTE network is sent,
Message, broadcast singal, multicast signals or short message.
In the technical solution of the disclosure, dual-mode terminal is by the loopback delay thresholding received and the reality of itself measured
Border loopback delay is compared, if actual loopback delay is less than threshold value, is shown that terminal is nearer from base station, can be initiated
VoLTE rises and exhales.In order to ensure relatively low cutting off rate, set loopback delay thresholding is currently located LTE network with dual-mode terminal
In sector coverage and protection band between position relationship it is related, if dual-mode terminal is currently located in LTE network
The coverage of sector, then can be using the corresponding loopback delay of sector radius as loopback delay door completely within protection band
Limit, if dual-mode terminal is currently located the coverage of the sector in LTE network, some ground is in protection band, can be with
Using within protection band, time delay corresponding with the distance between base station is as loopback delay thresholding, to ensure without different
Relatively low cutting off rate in the case of system switching.
Brief description of the drawings
Attached drawing described herein is used for providing further understanding of the disclosure, forms the part of the application.Attached
In figure：
Fig. 1 is LTE network and 2G/3G network coverage schematic diagrames.
Fig. 2 is to realize that different system switches schematic diagram using SRVCC technologies in the prior art.
Fig. 3 is the schematic diagram that the disclosure sets VoLTE switch protecting bands.
Fig. 4 is switch protecting band and sector distribution examples schematic diagram in the disclosure.
Fig. 5 is the flow diagram of the dispositions method of the isolated island Formula V oLTE of disclosure one embodiment.
Fig. 6 is the schematic diagram that the disclosure calculates loopback delay.
Fig. 7 is the flow diagram of the dispositions method of the isolated island Formula V oLTE of another embodiment of the disclosure.
Fig. 8 is the structure diagram of the dual-mode terminal of disclosure one embodiment.
Fig. 9 is the structure diagram of the dual-mode terminal of another embodiment of the disclosure.
Figure 10 is the structure diagram of the deployment system of the isolated island Formula V oLTE of disclosure one embodiment.
Embodiment
The disclosure is described below with reference to accompanying drawings.It should be noted that following description is only explanatory in itself and shows
Example property, never as to the disclosure and its application or any restrictions used.Unless stated otherwise, otherwise, implementing
The component and the positioned opposite and numerical expression and numerical value of step illustrated in example is not intended to limit the scope of the present disclosure.In addition,
Technology well known by persons skilled in the art, method and apparatus may not be discussed in detail, but be meant as in appropriate circumstances
Part for specification.
Fig. 3 is the schematic diagram that the disclosure sets VoLTE switch protecting bands.
As shown in figure 3, in LTE network and the overlapping coverage areas of 2G/3G networks（That is, the white area at center and its periphery
Light grey fringe area）Edge be provided with a switch protecting band, i.e. light grey fringe area in Fig. 3.
Specifically, the width of protection band can be adjusted according to the cutting off rate of setting.If for example, according to network index point
Analysis, find the protection band in some region using two base stations coverage when, cutting off rate of the cutting off rate well below setting（Example
Such as, 1%）, then it is contemplated that the width of protection band to be reduced to the coverage of a base station, further verify, if protection
Band for base station coverage when cutting off rate can also be less than 1%, then target reaches, you can with by the width of protection band
It is arranged to the coverage of a base station.It is pointed out that the width of the protection band in the disclosure can be less than a base station
Coverage.
Further, the width of the protection band is also related to the average call duration in network index.In network index
Average call duration is longer, and the width of protection band is wider.
Since the duration of call obeys certain probability distribution, after user rises and exhales in predetermined region progress VoLTE, even if carrying out
It is mobile, converse due to the presence of protection band, when most users are moved to LTE network edge and also have finished on.According to statistics,
For 99% call conversation duration about within 600 seconds, only about 1% duration of call may exceed 600 seconds.Therefore, it is right
In the setting of the width of protection band, as long as disclosure satisfy that 600 seconds mobile demands of user, cutting off rate can be limited in 1% with
Interior, speech quality can just meet commercial index request.
In addition it is also necessary to, it is noted that the following embodiments of the disclosure are applicable not only to speech business, can also be applied to regard
Frequency call or other mobile communication services.The stacking network of LTE network and 2G/3G networks is not only applicable to, is also applied for it
In the stacking network that his any two kinds of mobile communication technologies are formed.Due to New-deployed Network in the early stage relative to old system formula network and
Speech, its overlay area is smaller, and the coverage of old system formula network is wider, and therefore, the embodiment of the present disclosure is suitable for all brand-news
The stacking network of formula network and old system formula network.
For the ease of the narration to technical solution, the following embodiments of the disclosure are with cdma network and the overlay network of LTE network
Illustrated exemplified by network.
If CDMA/LTE dual-mode terminals carried out in the LTE areas of coverage audio call rise exhale, can use VoLTE technologies or
Person's CDMA voice technologies, by reserving VoLTE switch protecting bands so that sector coverage is completely within switch protecting band
Sector allows progress VoLTE to exhale, such as the CELL4 in Fig. 4.Further, it can initiate VoLTE and rise to exhale to expand as far as possible
Scope, using the base station of CELL4, CELL5 and CELL6 as the center of circle in Fig. 4, the geographical model within the camber line of CELL5 and CELL6 sectors
Enclose（That is, the B area of the a-quadrant of CELL5 and CELL6）Allow progress VoLTE to rise to exhale, LTE network can pass through loopback delay door
Limit parameter notifies the geographic range to dual-mode terminal；And the geographic range beyond the camber line of CELL5 and CELL6 sectors does not allow then
Carry out VoLTE to exhale, the audio call of the geographic range beyond the camber line of CELL5 and CELL6 sectors will use CDMA voice technologies.
Allow the geographic range for carrying out VoLTE callings namely to allow VoLTE to act the covering radius exhaled in LTE sectors, ring can be utilized
Return time delay thresholding and represent that it can be notified through but not limited to modes such as the system messages, short message, broadcast or multicast of LTE network
To dual-mode terminal.
Due to the presence of switch protecting band and the width of protection band is sufficiently wide, has acted the VoLTE exhaled and has called in user
When mobile, even if not switching to cdma network, cutting off rate also can be sufficiently low, meets commercial network index request.Under the disclosure
Embodiment is stated in the case where LTE network does not have the whole network covering, can farthest dispose VoLTE, and eliminate different system
The Complicated Flow and network optimization preparation of system switching, significantly simplify the CDMA network deployment associated with LTE.
Fig. 5 is the flow diagram of the dispositions method of the isolated island Formula V oLTE of disclosure one embodiment.
As shown in figure 5, the embodiment may comprise steps of：
S502, dual-mode terminal come from LTE network in overlapping covered interior receive at the same time of LTE network and 2G/3G networks
Signal and signal from 2G/3G networks so that can support that the dual-mode terminal of LTE network and 2G/3G networks can at the same time
To be linked into any network.
S504, the audio call initiated in response to dual-mode terminal, receives the base station that dual-mode terminal is currently located in LTE network
The information sent, specifically, it can be system message, broadcast that dual-mode terminal, which is currently located the information that base station in LTE network is sent,
Signal, multicast signals or short message.
Wherein, the information that the base station in LTE network is sent includes loopback delay thresholding, and the loopback delay thresholding is whole with bimodulus
The position relationship that end is currently located between the coverage and protection band of the sector in LTE network is related, if dual-mode terminal is worked as
The coverage of preceding sector in the lte networks is completely within protection band, then can will for example, the CELL4 shown in Fig. 4
The corresponding loopback delay of sector radius is as loopback delay thresholding, if dual-mode terminal is currently located the sector in LTE network
Some ground of coverage is in protection band, for example, CELL5 and CELL6 shown in Fig. 4, then can be by protection band
The corresponding time delay of beeline between lateral edges and base station is as loopback delay thresholding, it is ensured that acts the user exhaled and is in
In the VoLTE areas of coverage.
In addition, protection band sets for LTE network and the overlapping covered edge of overlapping covered middle-range of 2G/3G networks
The region of width, VoLTE switch protecting bands as shown in Figure 3.
S506, detects dual-mode terminal present position and the loopback delay being currently located between the base station in LTE network；
For example, can be detected by established data link or access procedure dual-mode terminal present position with it is current
Loopback delay between base station in the lte networks.
As shown in fig. 6, when Idle state dual-mode terminal accesses, base station is utilized according to the access information timing sent out in terminal
Time difference between the frame timing of base station determines loopback delay；When dual-mode terminal is in service connection state, dual-mode terminal root
The uplink frame timing difference sent according to the base station down frame timing that receives with terminal determines loopback delay, and terminal uplink
It is according to terminal to base station distance to send frame timing, is adjusted by base station by synchronous control command.
S508, by dual-mode terminal present position and the loopback delay being currently located between the base station in LTE network with
Loopback delay thresholding is compared.
S510, if dual-mode terminal present position and the loopback delay being currently located between the base station in LTE network
Less than loopback delay thresholding, then dual-mode terminal is based on VoLTE by call setup on an LTE network, and otherwise dual-mode terminal will call
Establish on 2G/3G networks.
In this embodiment, when dual-mode terminal is by the loopback delay thresholding received and the actual loopback of itself measured
Prolong and be compared, if actual loopback delay is less than threshold value, show that terminal is nearer from base station, VoLTE can be initiated and risen
Exhale.In order to ensure relatively low cutting off rate, set loopback delay thresholding is currently located the sector in LTE network with dual-mode terminal
Coverage and protection band between position relationship it is related, if the sector that dual-mode terminal is currently located in LTE network is covered
Lid scope, then can be using the corresponding loopback delay of sector radius as loopback delay thresholding, if double completely within protection band
Mould terminal is currently located some ground of the coverage of the sector in LTE network and is in protection band, then can will be in and protect
The corresponding time delay in the distance between base station within protecting band is as loopback delay thresholding, to ensure to switch without different system
In the case of relatively low cutting off rate.
Further, the coverage in the sector that dual-mode terminal is currently located in LTE network is partially in protection band
Within when, when can also adjust dual-mode terminal according to the cutting off rate of setting and being currently located the loopback that base station in LTE network is sent
Prolong thresholding.If cutting off rate is higher than network provider's index, loopback delay thresholding can be suitably reduced, i.e. reduce and initiate
The scope of VoLTE callings, otherwise can suitably increase loopback delay thresholding, i.e. the scope of VoLTE callings is initiated in increase.
Fig. 7 is the flow diagram of the dispositions method of the isolated island Formula V oLTE of another embodiment of the disclosure.
As shown in fig. 7, the embodiment may comprise steps of：
S702, dual-mode terminal come from LTE network in overlapping covered interior receive at the same time of LTE network and 2G/3G networks
Signal and signal from 2G/3G networks.
S704, the audio call initiated in response to dual-mode terminal, receives the base station that dual-mode terminal is currently located in LTE network
The information sent；Wherein, the information that the base station in LTE network is sent includes loopback delay thresholding and dual-mode terminal is currently located
Whether the coverage of the sector in LTE network is completely within protection band, and the loopback delay thresholding and dual-mode terminal are current
Position relationship between the coverage and protection band of sector in the lte networks it is related.
Whether S706, the coverage for the sector being currently located according to the dual-mode terminal of reception in LTE network are completely in
Information within protection band determines that dual-mode terminal initiates the mode of calling.
S708, if be completely within protection band, dual-mode terminal be based on VoLTE by call setup on an LTE network,
Otherwise, S710 is turned, it is true according to dual-mode terminal present position and the loopback delay being currently located between the base station in LTE network
Determine whether dual-mode terminal supports VoLTE rises to exhale.
S710, detects dual-mode terminal present position and the loopback delay being currently located between the base station in LTE network.
S712, by dual-mode terminal present position and the loopback delay being currently located between the base station in LTE network with
Loopback delay thresholding is compared.
S714, if dual-mode terminal present position and the loopback delay being currently located between the base station in LTE network
Less than loopback delay thresholding, then dual-mode terminal is based on VoLTE by call setup on an LTE network, and otherwise dual-mode terminal will call
Establish on 2G/3G networks.
In this embodiment, caused in order to prevent due to the setting of loopback delay coverage be completely in protection band with
Interior sector cannot initiate VoLTE in the appearance of its sector-edge part and act the problem of exhaling, and protection is completely in for coverage
Band within sector without loopback delay judgement, and directly allow initiate VoLTE rise exhale, just for those coverages across
The sector of protection band carries out the judgement of loopback delay, and the VoLTE scopes exhaled can be initiated further to increase.
The technical solution of the disclosure is described in detail by an instantiation next, referring again to Fig. 4.
CDMA/LTE dual-mode terminals receive the network signal of CDMA and LTE at the same time in the LTE areas of coverage；
The position within the camber line in the CELL5 that user is moved in LTE overlay areas（That is, a-quadrant）When, it is necessary to carry out
Audio call；Wherein, centered on the base station which shares, when radius can be by loopback that LTE network side is sent
Prolong thresholding to determine, if it find that cutting off rate is too big, then loopback delay thresholding is matched somebody with somebody into dot, if it find that cutting off rate is very low, then
Can be by loopback delay thresholding with a little bigger；
Dual-mode terminal learns that this sector is in the certain radius of base station by the system message of LTE CELL5（That is, in Fig. 4
A-quadrant）Calling can carry out VoLTE and rise to exhale, which allows VoLTE to act the radiuses exhaled with loopback delay threshold parameter to lead to
Know terminal；
If dual-mode terminal is surfing the web in the lte networks at this time, existing wireless connection, bimodulus is whole at this time
End can be eated dishes without rice or wine the time difference of connection uplink and downlink frame timing by LTE, when judging the loopback of dual-mode terminal current location and base station
Prolong, as shown in fig. 6, by the loopback delay surveyed out compared with the loopback delay thresholding received, dual-mode terminal knows mesh
Preceding geographical location can carry out VoLTE and exhale；
Dual-mode terminal establishes voice communication, and converses foundation in the VoLTE technologies of LTE network；
When user moves to outside, due to there are VoLTE switch protecting bands, and protect bandwidth sufficiently large, therefore
Call drop, audio call normal termination do not occur for calling.
If user continuously moves to CELL6 camber lines with exterior domain（That is, beyond the B area in Fig. 4）When, it is necessary to establish language
Sound is conversed, and the system message of dual-mode terminal from LTE network CELL6 sectors knows this sector in the certain radius of base station at this time
Calling can carry out VoLTE and exhale, which allows VoLTE to act the radiuses exhaled with loopback delay threshold parameter notice terminal；
If upper network process terminates dual-mode terminal at this time, therefore there is no wireless connection in LTE network, then dual-mode terminal to
LTE base station initiates access procedure, and base station returns to the loopback delay between terminal and base station to dual-mode terminal, and terminal will survey
Obtained loopback delay knows that dual-mode terminal current geographic position allows in base station compared with the loopback delay thresholding received
Loopback delay thresholding beyond, therefore cannot carry out VoLTE rise exhale；
Terminal is initiated to establish the request of audio call in cdma network again, by call setup cdma network voice skill
In art；
Cdma network is the perfect network of covering, and user's communication normal termination, call drop does not occur.
It will appreciated by the skilled person that realize that the whole of above method embodiment and part steps can pass through
The relevant hardware of programmed instruction is completed, and foregoing program can be stored in a computing device read/write memory medium, the journey
Sequence upon execution, execution the step of including above method embodiment, and foregoing storage medium can be including ROM, RAM, magnetic disc
With CD etc. is various can be with the medium of store program codes.
Fig. 8 is the structure diagram of the dual-mode terminal of disclosure one embodiment.
As shown in figure 8, the dual-mode terminal 80 in the embodiment can include network signal receiving unit 802, loopback delay
Thresholding receiving unit 804, loopback delay detection unit 806, loopback delay comparing unit 808 and call setup unit 810.Its
In,
Network signal receiving unit 802, for being received at the same time in overlapping covered in LTE network and 2G/3G networks
Signal from LTE network and the signal from 2G/3G networks；
Loopback delay thresholding receiving unit 804, for the audio call initiated in response to dual-mode terminal, receives dual-mode terminal
The information that the base station being currently located in LTE network is sent, the information that the base station in LTE network is sent include loopback delay thresholding,
Loopback delay thresholding and dual-mode terminal are currently located the position relationship between the coverage and protection band of the sector in LTE network
Correlation, protection band set the area of width for the overlapping covered edge of overlapping covered middle-range of LTE network and 2G/3G networks
Domain, wherein, the width of protection band is related to the average call duration in network index, and the average call duration in network index is got over
Long, the width of protection band is wider；
Loopback delay detection unit 806, for detecting dual-mode terminal present position and being currently located in LTE network
Loopback delay between base station；
Loopback delay comparing unit 808, for by dual-mode terminal present position and the base that is currently located in LTE network
Loopback delay between standing is compared with loopback delay thresholding；
Call setup unit 810, if for dual-mode terminal present position and the base station being currently located in LTE network
Between loopback delay be less than loopback delay thresholding, then based on VoLTE by call setup on an LTE network, otherwise by call setup
Stand on 2G/3G networks.
In this embodiment, when dual-mode terminal is by the loopback delay thresholding received and the actual loopback of itself measured
Prolong and be compared, if actual loopback delay is less than threshold value, show that terminal is nearer from base station, VoLTE can be initiated and risen
Exhale.In order to ensure relatively low cutting off rate, set loopback delay thresholding is currently located the sector in LTE network with dual-mode terminal
Coverage and protection band between position relationship it is related, if the sector that dual-mode terminal is currently located in LTE network is covered
Lid scope, then can be using the corresponding loopback delay of sector radius as loopback delay thresholding, if double completely within protection band
Mould terminal is currently located some ground of the coverage of the sector in LTE network and is in protection band, then can will be in and protect
The corresponding time delay in the distance between base station within protecting band is as loopback delay thresholding, to ensure to switch without different system
In the case of relatively low cutting off rate.
Further, loopback delay detection unit detects dual-mode terminal by established data link or access procedure and works as
Preceding position and the loopback delay being currently located between the base station in LTE network.
Further, the information that the base station in LTE network is sent further includes the fan that dual-mode terminal is currently located in LTE network
Whether the coverage in area is completely within protection band.
Fig. 9 is the structure diagram of the dual-mode terminal of another embodiment of the disclosure.
As shown in figure 9, compared with the embodiment in Fig. 8, the dual-mode terminal 90 in the embodiment can also include：
Method of calling determination unit 902, for covering for the sector that is currently located according to the dual-mode terminal of reception in LTE network
The information whether lid scope is completely within protection band determines that dual-mode terminal initiates the mode of calling, if being completely in protection
Band within, then based on VoLTE by call setup on an LTE network, otherwise, according to dual-mode terminal present position and current institute
The loopback delay between base station in the lte networks determines whether dual-mode terminal supports VoLTE rises to exhale.
Figure 10 is the structure diagram of the deployment system of the isolated island Formula V oLTE of disclosure one embodiment.
As shown in Figure 10, the system 100 in the embodiment can include LTE network side apparatus 1002,2G/3G network sides are set
Standby 1004 and dual-mode terminal 1006.Wherein, dual-mode terminal 1006 can be realized by previous embodiment.
Further, the coverage in the sector that dual-mode terminal is currently located in LTE network is partially in protection band
Within when, LTE network side apparatus adjusts dual-mode terminal according to the cutting off rate of setting and is currently located what base station in LTE network was sent
Loopback delay thresholding.
Further, the information that dual-mode terminal is currently located that base station in LTE network sends is system message, broadcast singal,
Multicast signals or short message.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and its
The difference of his embodiment, identical and similar part can be with cross-reference between each embodiment.For device embodiment
For, since it is substantially similar to embodiment of the method, so description is fairly simple, related part may refer to embodiment of the method
Partial explanation.
Although describe the disclosure with reference to exemplary embodiment, it should be appreciated that the present disclosure is not limited to above-mentioned exemplary
Embodiment.It will be obvious to those skilled in the art that it can be changed under conditions of without departing substantially from the scope of the present disclosure and spirit
Exemplary embodiments mentioned above.The scope of appended claim should be endowed most wide explanation, such to be repaiied comprising all
Change and equivalent 26S Proteasome Structure and Function.
Claims (15)
- A kind of 1. dispositions method of isolated island Formula V oLTE, it is characterised in that including：Dual-mode terminal LTE network and 2G/3G networks it is overlapping covered in receive signal from LTE network and next at the same time From the signal of 2G/3G networks；The audio call initiated in response to the dual-mode terminal, receives the base station that the dual-mode terminal is currently located in LTE network The information sent, the information that the base station in the LTE network is sent include loopback delay thresholding, the loopback delay thresholding and institute The position relationship stated between the coverage and protection band for the sector that dual-mode terminal is currently located in LTE network is related, the guarantor Protecting band sets the region of width for the overlapping covered edge of overlapping covered middle-range of LTE network and 2G/3G networks；Detect the dual-mode terminal present position and the loopback delay being currently located between the base station in LTE network；By the dual-mode terminal present position and the loopback delay being currently located between the base station in LTE network and the ring Time delay thresholding is returned to be compared；If the dual-mode terminal present position and the loopback delay being currently located between the base station in LTE network are less than institute Loopback delay thresholding is stated, then the dual-mode terminal is based on VoLTE by call setup on an LTE network, the otherwise dual-mode terminal By call setup on 2G/3G networks；If the coverage that dual-mode terminal is currently located the sector in LTE network removes institute in the overlay area of LTE network completely State in the region outside protection band, then using the corresponding loopback delay of sector radius as the loopback delay thresholding；If dual-mode terminal is currently located the coverage of the sector in LTE network, some ground is in protection band, will The corresponding time delay of beeline between the inside edge of protection band and base station is as the loopback delay thresholding.
- 2. the dispositions method of isolated island Formula V oLTE according to claim 1, it is characterised in that current in the dual-mode terminal The coverage of sector in the lte networks when being partially within the protection band, adjusted according to the cutting off rate of setting The loopback delay thresholding that the base station that the dual-mode terminal is currently located in LTE network is sent.
- 3. the dispositions method of isolated island Formula V oLTE according to claim 1, it is characterised in that pass through established data-link When road or access procedure detect the dual-mode terminal present position and the loopback being currently located between the base station in LTE network Prolong.
- 4. the dispositions method of isolated island Formula V oLTE according to claim 1, it is characterised in that the base station in the LTE network Whether the coverage that the information sent further includes the sector that the dual-mode terminal is currently located in LTE network is completely in LTE Within region of the overlay area of network in addition to the protection band, the method further includes：Whether the coverage for the sector being currently located according to the dual-mode terminal of reception in LTE network is completely in LTE nets Information within region of the overlay area of network in addition to the protection band determines that the dual-mode terminal initiates the mode of calling；If it is completely within region of the overlay area of LTE network in addition to the protection band, the dual-mode terminal base In VoLTE by call setup on an LTE network, otherwise, according to the dual-mode terminal present position and being currently located LTE nets The loopback delay between base station in network determines whether the dual-mode terminal supports VoLTE rises to exhale.
- 5. the dispositions method of isolated island Formula V oLTE according to claim 1, it is characterised in that the width of the protection band with Average call duration in network index is related.
- 6. the dispositions method of isolated island Formula V oLTE according to claim 5, it is characterised in that average logical in network index Words duration is longer, and the width of the protection band is wider.
- 7. the dispositions method of isolated island Formula V oLTE according to claim 1, it is characterised in that the current institute of dual-mode terminal The information that base station is sent in the lte networks is system message, broadcast singal, multicast signals or short message.
- A kind of 8. dual-mode terminal, it is characterised in that including：Network signal receiving unit, for coming from LTE in overlapping covered interior receive at the same time of LTE network and 2G/3G networks The signal of network and the signal from 2G/3G networks；Loopback delay thresholding receiving unit, for the audio call initiated in response to the dual-mode terminal, it is whole to receive the bimodulus The information for holding the base station that is currently located in LTE network to send, the information that the base station in the LTE network is sent include loopback delay Thresholding, the loopback delay thresholding are currently located the coverage and protection band of the sector in LTE network with the dual-mode terminal Between position relationship it is related, the protection band is LTE network and the overlapping covered middle-range overlapping coverage areas of 2G/3G networks Domain edge sets the region of width；Loopback delay detection unit, for the base for detecting the dual-mode terminal present position Yu being currently located in LTE network Loopback delay between standing；Loopback delay comparing unit, for by the dual-mode terminal present position and the base station that is currently located in LTE network Between loopback delay compared with the loopback delay thresholding；Call setup unit, if for the dual-mode terminal present position and the base station that is currently located in LTE network it Between loopback delay be less than the loopback delay thresholding, then based on VoLTE by call setup on an LTE network, otherwise will calling Establish on 2G/3G networks；If the coverage that dual-mode terminal is currently located the sector in LTE network removes institute in the overlay area of LTE network completely State in the region outside protection band, then using the corresponding loopback delay of sector radius as the loopback delay thresholding；If dual-mode terminal is currently located the coverage of the sector in LTE network, some ground is in the protection band, Then time delay that the beeline between the inside edge of protection band and base station is corresponding is as the loopback delay thresholding.
- 9. dual-mode terminal according to claim 8, it is characterised in that the loopback delay detection unit passes through established Data link or access procedure detect the dual-mode terminal present position and are currently located between the base station in LTE network Loopback delay.
- 10. dual-mode terminal according to claim 8, it is characterised in that the information that the base station in the LTE network is sent is also Whether the coverage for the sector being currently located including the dual-mode terminal in LTE network is completely in the area of coverage of LTE network Within region of the domain in addition to the protection band, the dual-mode terminal further includes：Method of calling determination unit, for being currently located the covering of the sector in LTE network according to the dual-mode terminal of reception The information whether scope is completely within region of the overlay area of LTE network in addition to the protection band determines the bimodulus The mode of terminal originated calls, if be completely within region of the overlay area of LTE network in addition to the protection band, Based on VoLTE by call setup on an LTE network, otherwise, according to the dual-mode terminal present position and being currently located LTE The loopback delay between base station in network determines whether the dual-mode terminal supports VoLTE rises to exhale.
- 11. dual-mode terminal according to claim 8, it is characterised in that in the width and network index of the protection band Average call duration is related.
- 12. dual-mode terminal according to claim 11, it is characterised in that the average call duration in network index is longer, The width of the protection band is wider.
- 13. a kind of deployment system of isolated island Formula V oLTE, it is characterised in that including LTE network side apparatus, 2G/3G network side equipments And the dual-mode terminal any one of claim 8 to 12.
- 14. the deployment system of isolated island Formula V oLTE according to claim 13, it is characterised in that work as in the dual-mode terminal When the coverage of preceding sector in the lte networks is partially within the protection band, the LTE network side apparatus root The loopback delay thresholding for the base station transmission that the dual-mode terminal is currently located in LTE network is adjusted according to the cutting off rate of setting.
- 15. the deployment system of isolated island Formula V oLTE according to claim 13, it is characterised in that the dual-mode terminal is current The information that base station is sent in the lte networks be system message, broadcast singal, multicast signals or short message.
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| CN201310276538.0A CN104284344B (en) | 2013-07-03 | 2013-07-03 | Dispositions method, system and the dual-mode terminal of isolated island Formula V oLTE |
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| CN102014502A (en) * | 2009-09-04 | 2011-04-13 | 华为技术有限公司 | Remote covering method and base station |
| CN102740418A (en) * | 2011-03-31 | 2012-10-17 | 华为技术有限公司 | Method for implementing voice service, and terminal |
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| EP2271153A1 (en) * | 2009-06-25 | 2011-01-05 | NEC Corporation | A method for managing a CS IRAT handover from a 2g/3g network to a LTE network |
| CN102014502A (en) * | 2009-09-04 | 2011-04-13 | 华为技术有限公司 | Remote covering method and base station |
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