CN105323813A - Method for returning to network and user equipment - Google Patents
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Abstract
The invention discloses a method for returning to a network. The method comprises the following steps that: in need of returning to a second network, user equipment UE residing on a first network determines a frequency point of the second network at the current position itself according to a currently stored corresponding position relationship of the first network and the second network; the UE searches a cell of the second network on the determined frequency point of the second network; and the UE initiates residing on the second network on the searched cell of the second network. The invention further discloses the UE.
Description
Technical field
The present invention relates to wireless communication field, particularly relate to a kind of method and the subscriber equipment (UE, UserEquipment) that return network.
Background technology
Concerning the operator of the multiple mode network of operation, need to consider how to ensure that UE is owing to covering or the problem of other reason interoperability in multiple network.
At present, as Long Term Evolution (LTE, LongTermEvolution) after terminal falls back to 2G/3G network, and when needing to return LTE network, in order to save operation cost (OPEX, OPeratingEXpense), when after introducing LTE network, operator does not modify to the network element of 2G/3G network, and the algorithm only relying on terminal self carries out frequency sweep, thus turns back to LTE network.Wherein, the reason that LTE terminal falls back to 2G/3G network can be: circuit domain dropping (CSFB, CircuitSwitchedFallback), injection frequently continuous voice call (SRVCC, SingleRadioVoiceCallContinuity) or lose LTE network covering etc.Under this condition, owing to not modifying to the network element of 2G/3G network, so much traditional interoperability function from 2G/3G network to 4G network, as different systematic evaluation, be redirected all cannot realize; LTE terminal also can only be searched for supported part or all of LTE frequency point voluntarily, and these LTE frequency point that LTE terminal is supported can be the history frequency of LTE terminal storage or the frequency adopting other method to measure, that is, the information of the frequency of LTE terminal search is history frequency point information, so, the success rate that LTE terminal returns LTE network can be reduced, also can there is the larger problem of time delay simultaneously.
Summary of the invention
For solving the technical problem of existing existence, the embodiment of the present invention provides a kind of method and the UE that return network.
Embodiments provide a kind of method returning network, comprising:
When needing to return second network, reside in the described first network of UE according to current preservation and the correspondence position relation of described second network of first network, determine the frequency of the described second network of self current position;
Described UE searches for the community of described second network on the frequency of the described second network determined; And the resident of described second network is initiated on the community of the described second network searched.
In such scheme, described determine the frequency of the described second network of self current position before, described method also comprises:
Described UE obtains described correspondence position relation, and preserves.
In such scheme, described in reside in the described first network of user equipment (UE) according to current preservation and the correspondence position relation of described second network of first network, determine the frequency of the described second network of self current position, comprising:
Described UE, according to the corresponding relation of the Location Area Code of the described first network of current preservation and the Location Area Code of described second network, searches the Location Area Code of described second network corresponding to self community, current place;
Described UE, according to the corresponding relation of the Location Area Code of the described second network searched and the Location Area Code of the described second network of current preservation and the frequency of described second network, determines the frequency of the described second network that self community, current place is corresponding.
In such scheme, described first network is 2G/3G network; Correspondingly, described second network is LTE network.
In such scheme, described correspondence position relation comprises: the Location Area Code (LAC of described 2G/3G network, LocationAreaCode), the tracking area code (TAC, TrackingAreaCode) of described LTE network and the corresponding relation of LTE frequency point.
The embodiment of the present invention additionally provides a kind of UE, comprising: determining unit, search unit and resident initiation unit; Wherein,
Described determining unit, when returning second network for needs, according to the first network of current preservation and the correspondence position relation of described second network, determines the frequency of the described second network of the current position of described UE; Described UE resides in described first network;
Described search unit, for searching for the community of described second network on the frequency of the described second network determined;
Described resident initiation unit, for initiating the resident of described second network on the community of the described second network searched.
In such scheme, described UE also comprises: acquiring unit, for obtaining described correspondence position relation, and preserves.
In such scheme, described determining unit comprises: search module and determination module; Wherein,
Describedly search module, for the corresponding relation of the Location Area Code of the described first network according to current preservation and the Location Area Code of described second network, search the Location Area Code of described second network corresponding to self community, current place;
Described determination module, for the corresponding relation according to the Location Area Code of described second network searched and the Location Area Code of the described second network of current preservation and the frequency of described second network, determine the frequency of the described second network that self community, current place is corresponding.
In such scheme, described first network is 2G/3G network; Correspondingly, described second network is LTE network.
In such scheme, described UE also comprises: memory cell, for storing described correspondence position relation.
Method and the UE of what the embodiment of the present invention provided return network, when needing to return second network, reside in the described first network of UE according to current preservation and the correspondence position relation of described second network of first network, determine the frequency of the described second network of self current position; Described UE searches for the community of described second network on the frequency of the described second network determined; And the resident of described second network is initiated on the community of the described second network searched, because described UE is the frequency determining second network based on the first network of current preservation and the correspondence position relation of second network, and on the frequency of the second network determined, search for the community of second network, so, full frequency band frequency sweep can be avoided, that is: do not need to search for other unnecessary frequencies, ensure that UE returns accuracy rate and the time delay of second network.
Accompanying drawing explanation
In accompanying drawing (it is not necessarily drawn in proportion), similar Reference numeral can describe similar parts in different views.The similar reference numerals with different letter suffix can represent the different examples of similar parts.Accompanying drawing generally shows each embodiment discussed herein by way of example and not limitation.
Fig. 1 is the method flow schematic diagram that the embodiment of the present invention one returns network;
Fig. 2 is the method flow schematic diagram that the embodiment of the present invention two returns network;
Fig. 3 is relation schematic diagram in network site in the embodiment of the present invention two;
Fig. 4 is position relationship schematic diagram in networking in building in the embodiment of the present invention two;
Fig. 5 is the structural representation of the embodiment of the present invention three UE.
Embodiment
At present, when the LTE terminal falling back to 2G/3G network returns LTE network, can only search for supported part or all of LTE frequency point voluntarily, that is, return performance to place one's entire reliance upon the performance of LTE terminal, network side is any ancillary method not, and the LTE frequency point information that LTE terminal is supported is history frequency point information, like this, the success rate that LTE terminal returns LTE network will be reduced; Further, if LTE terminal is searched for whole frequency, then the larger problem of time delay can be there is.
Based on this, in various embodiments of the present invention: when needing to return second network, reside in the described first network of UE according to current preservation and the correspondence position relation of described second network of first network, determine the frequency of the described second network of self current position; Described UE searches for the community of described second network on the frequency of the described second network determined; And the resident of described second network is initiated on the community of the described second network searched, because described correspondence position relation changes according to network design, that is, described correspondence position relation is that change is constantly updated, so the frequency that terminal is determined is disposed consistent with current network, the described correspondence position relation therefore based on current preservation determines that the frequency of described second network will reduce error rate and the time delay that described UE returns second network greatly.
Below in conjunction with embodiment, the present invention is described in further detail again.
Embodiment one
The present embodiment returns the method for network, as shown in Figure 1, comprises the following steps:
Step 101: when needing to return second network, resides in the described first network of UE according to current preservation and the correspondence position relation of described second network of first network, determines the frequency of the described second network of self current position;
Particularly, described UE, according to the corresponding relation of the Location Area Code of the described first network of current preservation and the Location Area Code of described second network, searches the Location Area Code of described second network corresponding to self community, current place;
Described UE, according to the corresponding relation of the Location Area Code of the described second network searched and the Location Area Code of the described second network of current preservation and the frequency of described second network, determines the frequency of the described second network that self community, current place is corresponding.
Wherein, during practical application, described first network can be 2G/3G network, and correspondingly, described second network can be LTE network or B4G network, 5G network etc.; Certainly, described first network also can be LTE network or B4G network, 5G network etc., and correspondingly, described second network can be 2G/3G network; In other words, the present embodiment does not limit described first network and described second network; The described first network of development along with technology and described second network can also be other networks.
When described first network is 2G/3G network, when described second network is LTE network, the Location Area Code of described first network refers to: LAC, and correspondingly, the Location Area Code of described second network refers to TAC; In other words, described correspondence position relation comprises: the corresponding relation of the Location Area Code LAC of described 2G/3G network, the tracking area code TAC of described LTE network and LTE frequency point.When described first network and described second network are other network, by that analogy.
During practical application, the corresponding relation between the frequency three of the Location Area Code of described first network, the Location Area Code of described second network and described second network can be preserved in table form, as shown in table 1.
Table 1
Before this step of execution, the method can also comprise:
Described UE obtains described correspondence position relation, and preserves.
Wherein, described correspondence position relation can give described UE by network side by the system information of described first network or other signaling; Or, the operation of webmaster personnel generation or network, management and maintenance (OAM, OperationAdministrationandMaintenance) system generates described correspondence position relation automatically, and described UE can get described correspondence position relation by the mode downloaded; That is, described correspondence position relation is got by pre-configured mode.
Here, when described correspondence position relation informs described UE by network side by the mode of system information or other signaling, need the specification of eating dishes without rice or wine of define grid side and described UE, be implemented as those skilled in the art, repeat no more.
Step 102: described UE searches for the community of described second network on the frequency of the described second network determined; And the resident of described second network is initiated on the community of the described second network searched.
Here, when not searching the community of described second network on the frequency of the described second network determined, described UE searches for the community of described second network on full frequency band.
The method of what the embodiment of the present invention provided return network, is particularly useful for UE does not configure again described second network adjacent area application scenarios at described first network.
The method of what the embodiment of the present invention provided return network, when needing to return second network, reside in the described first network of UE according to current preservation and the correspondence position relation of described second network of first network, determine the frequency of the described second network of self current position; Described UE searches for the community of described second network on the frequency of the described second network determined; And the resident of described second network is initiated on the community of the described second network searched, because described UE is the frequency determining second network based on the first network of current preservation and the correspondence position relation of second network, and on the frequency of the second network determined, search for the community of second network, so, full frequency band frequency sweep can be avoided, that is: do not need to search for other unnecessary frequencies, ensure that UE returns accuracy rate and the time delay of second network.
In addition, the change of the program to network side and UE is smaller, and UE does not need to increase hardware device, and cost is low.
Embodiment two
The application scenarios of the present embodiment is: UE is LTE terminal, and LTE terminal falls back to 2G/3G network, and needs to turn back to LTE network.
The present embodiment returns the method for network, as shown in Figure 2, comprises the following steps:
Step 201:LTE terminal obtains LAC, the TAC of LTE network and the corresponding relation of LTE frequency point of 2G/3G network, and preserves;
Here, described corresponding relation can by network side by the system information of 2G/3G network or other signaling to LTE terminal; Or webmaster personnel generate or the OAM system of network generates described corresponding relation automatically, LTE can get described correspondence position relation by the mode downloaded, that is: get described corresponding relation by pre-configured mode.
The minimum vertex-covering unit of LTE network is community, and several communities form a tracing area (TrackingArea), and has a common TAC, is around the covering of the tracing area that other TAC is corresponding.Usually, the several tracing areas covered continuously have based on one or several frequency and cover, as shown in Figure 3 and Figure 4.Alien frequencies covering can also be carried out for hot zones and carry out concurrent heating, as in Fig. 3
shown region.
At present, global system for mobile communications (GSM, GlobalSystemforMobilecommunication) area coverage that a LAC of network is corresponding can be more than or equal to area coverage corresponding to the TAC of a LTE network, therefore, in certain area, the LAC of GSM network can be mapped to several LTETAC with covering, and then be mapped to LTE frequency point, that is: GSMLAC-> LTETAC-> LTE frequency point, as shown in Figure 3, the corresponding LTE frequency point f0 of LAC1 of GSM network, f1, as shown in Figure 4, the corresponding LTE frequency point f2 of LAC of GSM network, f3 and f4.
During practical application, for the scene that LTE alien frequencies focus covers, in order to simplify configuration, only can be configured for the LTE frequency point of covering in described corresponding relation, namely in Fig. 3, GSMLACl only corresponds to LTE frequency point f0.
Described LTE terminal can be time division duplex-LTE (TDD-LTE, TimeDivisionDuplex-LTE) LTE terminal or Frequency Division Duplexing (FDD)-LTE (FDD-LTE, FrequencyDivisionDuplex-LTE) terminal; Or, described terminal be not limited to data terminal, circuit domain dropping (CSFB, CircuitSwitchedFallback) terminal, based on voice (VoLTE, the VoiceoverLTE) terminal of LTE, two standby terminals etc.
It should be noted that: the 2G/3G network of the present embodiment is not limited to GSM network, global system for mobile communications Radio Access Network (UTRAN, UniversalMobileTelecommunicationSystemRadioAccessNetwork).
Step 202: when needing to return LTE network, the LAC of 2G/3G network of LTE terminal according to current preservation and the corresponding relation of the TAC of LTE network, search the TAC of LTE network corresponding to self community, current place;
Here, suppose that LTE terminal adopts CSFB technology to fall back to GSM network, after LTE terminal hangs up circuit switching (CS, CircuitSwitched) phone, need to return LTE network.
Step 203:LTE terminal, according to the LAC of LTE network of the TAC of the LTE network of searching and current preservation and the corresponding relation of LTE frequency point, determines the LTE frequency point that self community, current place is corresponding;
Step 204:LTE terminal searches for the community of LTE network in the LTE frequency point of the correspondence determined;
Whether step 205:LTE terminal judges searches the community of LTE network, if so, then performs step 206, otherwise, perform step 207;
Here, during practical application, the corresponding relation of the LAC of 2G/3G network, the TAC of LTE network and LTE frequency point can be stored in LTE terminal with the forms mode shown in table 1, when there is multiple corresponding relation, LTE terminal determines according to order from top to bottom the LTE frequency point that self community, current place is corresponding from form, if the LTE frequency point determined does not search the community of LTE network, then using LTE frequency point that the LTE frequency point in corresponding relation next in form is corresponding as self community, current place, and in the LTE frequency point determined, search for the community of LTE network, if also do not search the community of LTE network, then using LTE frequency point that the LTE frequency point in the next again corresponding relation in form is corresponding as self community, current place, and in the LTE frequency point determined, search for the community of LTE network, the rest may be inferred, until search the community of LTE network in the LTE frequency point determined, when LTE frequency point in all corresponding relations does not all search the community of LTE network, then LTE terminal searches for the community of LTE network on full frequency band.
Step 206: initiate the resident of described second network on the community of the described second network searched, terminate to work as pretreatment process;
Step 207:LTE terminal searches for the community of LTE network on full frequency band, and the resident of described second network is initiated in the community searched, and terminates current handling process.
Embodiment three
For realizing the method for embodiment one, the present embodiment provides a kind of UE, and as shown in Figure 5, this UE comprises: determining unit 51, search unit 52 and resident initiation unit 53; Wherein,
Described determining unit 51, when returning second network for needs, according to the first network of current preservation and the correspondence position relation of described second network, determines the frequency of the described second network of the current position of described UE; Described UE resides in described first network;
Described search unit 52, for searching for the community of described second network on the frequency of the described second network determined;
Described resident initiation unit 53, for initiating the resident of described second network on the community of the described second network searched.
Wherein, described determining unit 51 can also comprise: search module and determination module; Wherein,
Describedly search module, for the corresponding relation of the Location Area Code of the described first network according to current preservation and the Location Area Code of described second network, search the Location Area Code of described second network corresponding to self community, current place;
Described determination module, for the corresponding relation according to the Location Area Code of described second network searched and the Location Area Code of the described second network of current preservation and the frequency of described second network, determine the frequency of the described second network that self community, current place is corresponding.
Here, during practical application, described first network can be 2G/3G network, and correspondingly, described second network can be LTE network or B4G network, 5G network etc.; Certainly, described first network also can be LTE network or B4G network, 5G network etc., and correspondingly, described second network can be 2G/3G network; In other words, the present embodiment does not limit described first network and described second network; The described first network of development along with technology and described second network can also be other networks.
When described first network is 2G/3G network, when described second network is LTE network, the Location Area Code of described first network refers to: LAC, and correspondingly, the Location Area Code of described second network refers to TAC; In other words, described correspondence position relation comprises: the corresponding relation of the Location Area Code LAC of described 2G/3G network, the tracking area code TAC of described LTE network and LTE frequency point.When described first network and described second network are other network, by that analogy.
During practical application, the corresponding relation between the frequency three of the Location Area Code of described first network, the Location Area Code of described second network and described second network can be preserved in table form, as shown in table 1.
This UE can also comprise: acquiring unit, for obtaining described correspondence position relation, and preserves.
This UE can also comprise: memory cell, for storing described correspondence position relation.
Wherein, described correspondence position relation can give described acquiring unit by network side by the system information of described first network or other signaling; Or webmaster personnel generate or the OAM system of network generates described correspondence position relation automatically, described acquiring unit can get described correspondence position relation by the mode downloaded; That is, described correspondence position relation is got by pre-configured mode.
Here, when described correspondence position relation informs described acquiring unit by network side by the mode of system information or other signaling, need the specification of eating dishes without rice or wine of define grid side and described UE, be implemented as those skilled in the art, repeat no more.
When not searching the community of described second network on the frequency of the described second network determined, described search unit 52 searches for the community of described second network on full frequency band.
The scheme that the embodiment of the present invention provides, is particularly useful for UE does not configure again described second network adjacent area application scenarios at described first network.
During practical application, describedly search module and determination module can by the central processing unit (CPU in UE, CentralProcessingUnit), digital signal processor (DSP, DigitalSignalProcessor) or programmable logic array (FPGA, Field-ProgrammableGateArray) realize; Described search unit 52, described resident initiation unit 53 and described acquiring unit can by CPU, DSP or the FPGA in UE in conjunction with transceiver implementation; Described memory cell can be realized by the memory in UE.
The UE that the embodiment of the present invention provides, when needing to return second network, the described first network of described determining unit 51 according to current preservation and the correspondence position relation of described second network, determine the frequency of the described second network of the current position of described UE; Described search unit 52 searches for the community of described second network on the frequency of the described second network determined; Described resident initiation unit 53 initiates the resident of described second network on the community of the described second network searched, owing to being the frequency determining second network based on the first network of current preservation and the correspondence position relation of second network, and on the frequency of the second network determined, search for the community of second network, so, full frequency band frequency sweep can be avoided, that is: do not need to search for other unnecessary frequencies, ensure that UE returns accuracy rate and the time delay of second network.
In addition, the change of the program to network side and UE is smaller, and UE does not need to increase hardware device, and cost is low.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of hardware embodiment, software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.
Claims (10)
1. return a method for network, it is characterized in that, described method comprises:
When needing to return second network, reside in the described first network of user equipment (UE) according to current preservation and the correspondence position relation of described second network of first network, determine the frequency of the described second network of self current position;
Described UE searches for the community of described second network on the frequency of the described second network determined; And the resident of described second network is initiated on the community of the described second network searched.
2. method according to claim 1, is characterized in that, described determine the frequency of the described second network of self current position before, described method also comprises:
Described UE obtains described correspondence position relation, and preserves.
3. method according to claim 1, it is characterized in that, the described described first network of user equipment (UE) according to current preservation and the correspondence position relation of described second network residing in first network, determine the frequency of the described second network of self current position, comprising:
Described UE, according to the corresponding relation of the Location Area Code of the described first network of current preservation and the Location Area Code of described second network, searches the Location Area Code of described second network corresponding to self community, current place;
Described UE, according to the corresponding relation of the Location Area Code of the described second network searched and the Location Area Code of the described second network of current preservation and the frequency of described second network, determines the frequency of the described second network that self community, current place is corresponding.
4. method according to claim 1, is characterized in that, described first network is 2G/3G network; Correspondingly, described second network is LTE network.
5. method according to claim 4, is characterized in that, described correspondence position relation comprises: the corresponding relation of the Location Area Code LAC of described 2G/3G network, the tracking area code TAC of described LTE network and LTE frequency point.
6. a UE, is characterized in that, described UE comprises: determining unit, search unit and resident initiation unit; Wherein,
Described determining unit, when returning second network for needs, according to the first network of current preservation and the correspondence position relation of described second network, determines the frequency of the described second network of the current position of described UE; Described UE resides in described first network;
Described search unit, for searching for the community of described second network on the frequency of the described second network determined;
Described resident initiation unit, for initiating the resident of described second network on the community of the described second network searched.
7. UE according to claim 6, is characterized in that, described UE also comprises: acquiring unit, for obtaining described correspondence position relation, and preserves.
8. UE according to claim 6, is characterized in that, described determining unit comprises: search module and determination module; Wherein,
Describedly search module, for the corresponding relation of the Location Area Code of the described first network according to current preservation and the Location Area Code of described second network, search the Location Area Code of described second network corresponding to self community, current place;
Described determination module, for the corresponding relation according to the Location Area Code of described second network searched and the Location Area Code of the described second network of current preservation and the frequency of described second network, determine the frequency of the described second network that self community, current place is corresponding.
9. UE according to claim 6, is characterized in that, described first network is 2G/3G network; Correspondingly, described second network is LTE network.
10. UE according to claim 6, is characterized in that, described UE also comprises: memory cell, for storing described correspondence position relation.
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