CN103561436A - Network redirection method and device - Google Patents
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- CN103561436A CN103561436A CN201310542347.4A CN201310542347A CN103561436A CN 103561436 A CN103561436 A CN 103561436A CN 201310542347 A CN201310542347 A CN 201310542347A CN 103561436 A CN103561436 A CN 103561436A
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Abstract
The invention provides a network redirection method and device. A first access device receives an RRC connection request which is sent by UE in order to access a first frequency point of a UTRAN. The RRC connection request comprises an identification code which is used for instructing the UE to support an E-UTRAN. The first frequency point carries an RRC connection release message which is sent by a second access device to the UE. The first access device judges whether the UE is allowed to access the UTRAN or not, if not and the rejection frequency is not above the preset frequency, the value of the identification code is modified to instruct the UE not to support the E-UTRAN and a first RRC connection rejection message is sent to the UE. An RRC connection request which is sent again on the first frequency point by the UE is received and judging whether the UE is allowed to access the UTRAN or not and sequential operation are performed again, until the rejection frequency is above the preset frequency or the UE is judged to be allowed to access the UTRAN. According to the network redirection method and device, the ping-pong effect in the time of redirection is avoided by modifying the value of the identification code.
Description
Technical field
The present invention relates to the communication technology, relate in particular to a kind of network redirection method and device.
Background technology
Based in being redirected of R8, subscriber equipment (User Equipment, be called for short UE) to universal terrestrial access network (Universal Terrestrial Radio Access Network, be called for short UTRAN) transmission Radio Resource control (Radio Resource Control, be called for short RRC) connection request, with application, set up RRC with UTRAN network and be connected, with guarantee business continue carry out.
In practical application, can be because the offered load of UTRAN be in blocking up or the reason such as access principle, may there is refusing the situation of UE access UTRAN in the access device in UTRAN.In being redirected of R8, RRC connection request carries the pre-cell " Pre-Redirection info " that is redirected, the cell value of " the Pre-Redirection info " carrying in this RRC connection request is " True ", indicate UE and support evolved UTRAN(Evolved UTRAN, be called for short E-UTRAN).Because UE supports E-UTRAN, access device, after refusal UE access UTRAN, can send Indication message to UE, and indication UE is redirected back in E-UTRAN.
But, after UE gets back in E-UTRAN, can attempt being redirected to UTRAN because of same reason again, UTRAN may refuse the access of UE again, makes UE be redirected to again E-UTRAN.So repeatedly carry out the redirection process between UTRAN and E-UTRAN, be called as the ping-pong in redirection process, tend to cause the interruption of business, and bring larger load to network, wasted Internet resources.
Summary of the invention
The invention provides a kind of network redirection method and device, in order to solve, from E-UTRAN, be redirected to the ping-pong existing the process of UTRAN, to reduce the waste of Internet resources and to alleviate network load.
For achieving the above object, the invention provides a kind of network redirection method, comprising:
The first access device receives user equipment (UE) for accessing the radio resource control RRC connection request sending on the first frequency of general land wireless network UTRAN; Described RRC connection request comprises the identification code that is used to indicate described UE support evolved universal terrestrial wireless network E-UTRAN; Wherein, described the first frequency is carried in the RRC connection release message that the second access device sends to described UE;
Described the first access device judges whether to allow described UE to access described UTRAN;
If when the determination result is NO and refusal number of times does not exceed preset times, described the first access device is revised the value of described identification code, to indicate described UE not support E-UTRAN;
Described the first access device sends a RRC connection refused message to described UE;
Described the first access device receives the described RRC connection request that described UE resends on described the first frequency;
Described the first access device re-executes and judges whether to allow described UE to access described UTRAN and subsequent operation, until described refusal number of times exceeds described preset times or judges, allows described UE to access in described UTRAN.
For achieving the above object, the invention provides a kind of network redirection device, comprising:
Receiver module, for repeating to receive user equipment (UE) for accessing the radio resource control RRC connection request sending on the first frequency of general land wireless network UTRAN; Described RRC connection request comprises the identification code that is used to indicate described UE support evolved universal terrestrial wireless network E-UTRAN, until refusal number of times exceeds preset times or judges, allows described UE to access in described UTRAN; Wherein, described the first frequency is carried in the RRC connection release message that the second access device sends to described UE;
Judge module, for receive at described receiver module after described RRC connection request message at every turn, judges whether to allow described UE to access described UTRAN;
Modified module, when accessing described UTRAN and described refusal number of times and do not exceed described preset times for judge the described UE of refusal at described judge module at every turn, revises the value of described identification code, to indicate described UE, does not support E-UTRAN;
Sending module, after the value at the described identification code of the each modification of described modified module, sends a RRC connection refused message to described UE, so that described UE resends described RRC connection request on described the first frequency.
The invention provides a kind of network redirection method and device.The first access device receives the RRC connection request that UE sends on the first frequency for UTRAN, RRC connection request comprises the identification code that is used to indicate UE support E-UTRAN, wherein, the first frequency is carried in the RRC connection release message that the second access device sends to UE, the first access device judges whether to allow UE access UTRAN, if the determination result is NO and refusal number of times does not exceed preset times, the value of the first access device modified logo code, with indication, UE does not support E-UTRAN, and send a RRC connection refused message to UE, the first access device receives the RRC connection request that UE resends on the first frequency, and re-execute and judge whether to allow UE access UTRAN and subsequent operation, until exceeding preset times or judge, refusal number of times allows in UE access UTRAN.The access device of the present invention in UTRAN judged while not allowing UE access, modification is carried at the value of the identification code in RRC connection request, make access device judge that UE does not support E-UTRAN, thereby to UE, send the RRC connection refused message of not carrying E-UTRAN frequency, UE when refusing its access, UTRAN also cannot be redirected in E-UTRAN again, can only on UTRAN frequency, again to access device, send the RRC connection request of access UTRAN, thereby solved the ping-pong existing in prior art during being redirected to UTRAN process from E-UTAN, can reduce the waste of Internet resources, and can alleviate network load, be conducive to speech business and data service continue carry out.
Accompanying drawing explanation
The schematic diagram of a kind of network redirection method that Fig. 1 provides for the embodiment of the present invention;
The schematic diagram of the another kind of network redirection method that Fig. 2 provides for the embodiment of the present invention;
The schematic diagram of the another kind of network redirection method that Fig. 3 provides for the embodiment of the present invention;
The structural representation of a kind of network redirection device that Fig. 4 provides for the embodiment of the present invention;
The structural representation of the another kind of network redirection device that Fig. 5 provides for the embodiment of the present invention;
The structural representation of the another kind of network redirection device that Fig. 6 provides for the embodiment of the present invention.
Embodiment
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Fig. 1 provides a kind of schematic diagram of network redirection method for the embodiment of the present invention.The scene of embodiment of the present invention application is that UE is redirected in UTRAN from E-UTRAN.The executive agent of the method is the first access device for network insertion that is arranged in UTRAN.As shown in Figure 1, this network redirection method method comprises the following steps:
101, the first access device receives user equipment (UE) for accessing the radio resource control RRC connection request sending on the first frequency of general land wireless network UTRAN; Described RRC connection request comprises the identification code that is used to indicate described UE support evolved universal terrestrial wireless network E-UTRAN; Wherein, described the first frequency is carried in the RRC connection release message that the second access device sends to described UE.
When the signal of E-UTRAN a little less than, and the signal of UTRAN is when stronger, or when the UE in current access E-UTRAN needs carry voice traffic, just need UE to carry out circuit domain dropping (Circuit Switched FallBack, be called for short CSFB), UE is fallen back in UTRAN to complete continuing of speech business, evolved base station (Evolved NodeB now, be called for short eNB) can issue a RRC connection release message to this UE, in this RRC connection release message, carry for accessing the first frequency of UTRAN.This first frequency is that eNB is the frequency that UE chooses.Wherein, eNB can obtain the frequency point information of measurement according to the measurement report reporting, and then therefrom selects a frequency as the first frequency; Alternatively, the frequency Selection Strategy that the operator that can prestore in eNB arranges, chooses a frequency as the first frequency according to this frequency Selection Strategy, and wherein, different frequency Selection Strategies is corresponding to different redirected reasons.After receiving RRC connection release message, UE is connected release with the RRC between eNB.Now, UE just can be redirected to UTRAN from E-UTRAN.
The first access device in UTRAN receives the RRC connection request that UE sends on the first frequency, to ask setting up radio bearer with UTRAN.Wherein, RRC connection request comprises the identification code that is used to indicate UE support E-UTRAN.This identification code can be " Pre-redirection info " cell in RRC connection request.In RRC connection request, the cell value of " Pre-redirection info " cell remains " True " always, and cell value illustrates UE for " True " is used to refer to can support E-UTRAN.In the present embodiment, the first access device can be the radio network controller in UTRAN (Radio Network Controller is called for short RNC).The second access device can be the eNB in E-UTRAN.
102, described the first access device judges whether to allow described UE to access described UTRAN.
Particularly, after receiving RRC connection request, the first access device can judge according to the offered load situation of UTRAN or access principle etc., to determine whether allowing UE to access in UTRAN.For example, at the offered load of UTRAN, during in saturation condition, the first access device is judged and is not allowed UE access UTRAN.
103 if the determination result is NO and refusal number of times do not exceed preset times, described the first access device is revised the value of described identification code, to indicate described UE not support E-UTRAN.
In the present embodiment, in judging refusal UE access UTRAN, the first access device can the cumulative record refusal number of times corresponding with this RRC connection request.Particularly, a counter can be set in the first access device, the unaccepted number of times of same RRC connection request sending by the same UE of this counter records.In the present embodiment the first access device judge for the first time refusal UE be linked into UTRAN in time, counter will be activated, now initial count value is 1.Whenever the first access device is judged while refusing UE access UTRAN because of same RRC connection request, counter just need to add 1 on current count value basis, obtains this RRC and connects unaccepted refusal number of times.
After judging refusal UE access UTRAN, the first access device further judges whether the refusal number of times of counter records exceeds preset times.If refusal number of times does not exceed preset times, the first access device is revised the value of the identification code in RRC connection request.Particularly, the cell value that the first access device can " Pre-redirection info " cell is set to " False ".In reality, by the value of IE in " Pre-redirection info " cell " Support of E-UTRAN FDD " and " Support of E-UTRAN TDD " for being all set to " False ".This preset times can be by network configuration, also can by administrative staff according to the actual requirements with experience flexible configuration, general preset times can be 2～3 times.
104, described the first access device sends a RRC connection refused message to described UE.
After having revised the value of identification code, the first access device can send a RRC connection refused message to UE, to notify UE the first access device not allow in its access UTRAN.In the present embodiment, in judging refusal UE access UTRAN and when refusal number of times does not exceed preset times, the first access device is modified the value of the identification code carrying in RRC connection request, amended identification code indicates UE and does not support E-UTRAN.Such the first access device will connect in refusal request and not carry for accessing the frequency of E-UTRAN at a RRC who sends to UE, thereby UE just cannot refuse, after its access, to be redirected in E-UTRAN at once at UTRAN network.
105, described the first access device receives the described RRC connection request that described UE resends on described the first frequency, and re-execute and judge whether to allow described UE to access described UTRAN and subsequent operation, until exceeding described preset times or judge, described refusal number of times allow described UE to access in described UTRAN.
In the present embodiment, owing to not carrying in a RRC connection request for accessing the frequency of E-UTRAN, after receiving a RRC connection refusal request, UE can only continue to resend RRC connection request to the first access device on the first frequency, again set up radio bearer with UTRAN, so that business is lasting.
The first access device receives RRC connection request again, continue to re-execute and judge whether to allow UE access UTRAN, and when judging refusal UE access UTRAN and refusal number of times and not exceeding preset times, revise the value of identification code in RRC connection request, and send a RRC connection request to UE, until refusal number of times exceeds preset times or the first access device is judged in permission UE access UTRAN.
The network redirection method that the present embodiment provides, the first access device receives the RRC connection request that UE sends on the first frequency for UTRAN, RRC connection request comprises the identification code that is used to indicate UE support E-UTRAN, the first frequency is carried in the RRC connection release message that the second access device sends to UE, the first access device judges whether to allow UE access UTRAN, if the determination result is NO and refusal number of times does not exceed preset times, the value of the first access device modified logo code, with indication, UE does not support E-UTRAN, and send a RRC connection refused message to UE, the first access device receives the RRC connection request that UE resends on the first frequency, and re-execute and judge whether to allow UE access UTRAN and subsequent operation, until exceeding preset times or judge, refusal number of times allows in UE access UTRAN.
Access device in the present embodiment in UTRAN is judged while not allowing UE access, modification is carried at the value of the identification code in RRC connection request, make access device judge that UE does not support E-UTRAN, thereby to UE, send the RRC connection refused message of not carrying E-UTRAN frequency, UE when refusing its access, UTRAN also cannot be redirected in E-UTRAN again, can only on UTRAN frequency, again to access device, send the RRC connection request of access UTRAN, thereby solved the problem of the ping-pong existing in prior art during being redirected to UTRAN process from E-UTAN, can reduce the waste of Internet resources, and can alleviate network load, be conducive to speech business and data service continue carry out.
Fig. 2 for the another kind of network redirection method that the embodiment of the present invention provides be schematic diagram.As shown in Figure 2, the method comprises the following steps:
201, the first access device receives UE for accessing the RRC connection request sending on the first frequency of UTRAN.
Can, referring to the record of related content in step 101 in above-described embodiment, repeat no more herein.
202, the first access device judges whether to allow UE access UTRAN.
After receiving RRC connection request, the first access device can judge according to the offered load situation of UTRAN or access principle etc., to determine whether allowing UE to access in UTRAN.For example, at the offered load of UTRAN, during in saturation condition, the first access device is judged and is not allowed UE access UTRAN.If the determination result is NO, perform step 203; If judgment result is that to be, perform step 301.
203, whether the first access device judgement refusal number of times exceeds preset times.
In the first access device, be provided with counter, for the unaccepted refusal number of times of same RRC connection request.The first access device, after judging refusal UE access UTRAN, needs further judgement refusal number of times whether to exceed preset times.If the determination result is NO, perform step 204; If judgment result is that to be, perform step 401.
204, the value of the first access device modified logo code, to indicate UE not support E-UTRAN.
The identification code carrying in RRC connection request, the value of this identification code can indicate UE and support E-UTRAN, in the present embodiment, in judging refusal UE access UTRAN and when refusal number of times does not exceed preset times, the first access device is modified to the value of identification code, makes the value of amended identification code indicate UE and does not support E-UTRAN.
205, the first access device sends a RRC connection refused message to UE.
In this example, owing to not carrying in a RRC connection refused message for accessing the frequency of E-UTRAN, after receiving a RRC connection refused message, UE still can send RRC connection request to the first access device on the first frequency, and the first access device returns to execution step 201.
301, the first access device and UE set up radio bearer.
The first access device is judged while allowing UE access UTRAN in step 202, the first access device will and UE between set up radio bearer, to carry out continuing of business.
401, the first access device keeps the value of identification code.
In step 203, judge refusal number of times and exceed after preset times, the first access device keeps the value of identification code, the no longer value of modified logo code.
402, the first access device sends the 2nd RRC connection refused message to UE, the 2nd RRC connection refused message is carried for accessing the second frequency of E-UTRAN, so that UE sends RRC connection request to the second access device on the second frequency, so that UE is redirected in E-UTRAN.
In step 401, due to the first access device value of modified logo code no longer, so just can determine UE and support E-UTRAN.Now, the first access device will send the 2nd RRC connection refused message to UE, can carry for accessing the second frequency of E-UTRAN in this RRC connection refused message.Further, UE on the second frequency to the second access device the eNB in E-UTRAN send RRC connection request, so that UE is redirected in E-UTRAN.
In the present embodiment, the first access device can also carry refusal indication in the 2nd RRC connection refused message, and this refusal indication is used in reference to the refusal indication that UTRAN refusal UE access is shown.UE can be transmitted to the eNB in E-UTRAN by the second frequency by this refusal indication.After UE is in the second frequency is linked into E-UTRAN, if UE, because of identical redirected reason, in the time of need to being redirected in UTRAN, refuses the UE access of this redirected reason because eNB learns UTRAN, now eNB can not be redirected to this UE in UTRAN again.Preferably, can preset certain time interval, eNB can or not be redirected to UE in UTRAN because of identical redirected reason within this time interval, and wherein, this time interval can have network side to set according to the actual requirements.
Access device in the present embodiment in UTRAN is judged while not allowing UE access, modification is carried at the value of the identification code in RRC connection request, make access device judge that UE does not support E-UTRAN, thereby to UE, send the RRC connection refused message of not carrying E-UTRAN frequency, UE when refusing its access, UTRAN also cannot be redirected in E-UTRAN again, can only on UTRAN frequency, again to access device, send the RRC connection request of access UTRAN, thereby solved the problem of the ping-pong existing in prior art during being redirected to UTRAN process from E-UTAN, can reduce the waste of Internet resources, and can alleviate network load, be conducive to speech business and data service continue carry out.Further, the present embodiment can also, at UE after the first frequency is repeatedly rejected to the first access device transmission RRC connection request, be redirected to UE in E-UTRAN again.
The schematic diagram of the another kind of network redirection method that Fig. 3 provides for the embodiment of the present invention.As shown in Figure 3, the method comprises the following steps:
301, the first access device receives the RRC connection request that UE sends on the first frequency, and RRC connection request also comprises being used in reference to the type codes that UE is redirected to the reason in UTRAN is shown.
Particularly, the first access device at UE for accessing the RRC connection request sending on the first frequency of UTRAN.Wherein, RRC connection request not only comprises the identification code that is used to indicate UE support E-UTRAN, also comprises being used in reference to the type codes that UE is redirected to the reason of UTRAN is shown.About related content and the explanation of the first frequency, can, referring to the record of related content in above-described embodiment, repeat no more herein.
302, the first access device, according to type codes, judges whether the reason that UE is redirected in UTRAN is CSFB.
In the present embodiment, for different redirected reasons, different type codes is set in advance, wherein, the introduction of redirected reason can be participated in the record of related content in above-described embodiment, repeats no more herein.
UE need to when E-UTRAN is redirected to UTRAN, can be carried in the RRC connection request sending to the first access device being redirected type codes corresponding to reason.After receiving RRC connection request, the first access device, according to the type codes of carrying in this RRC connection request, identifies UE and is redirected to the reason in UTRAN.Further, whether be CSFB to the first access device if just can judge redirected reason.If judgment result is that described former because CSFB performs step 401; If judgment result is that the non-CSFB of described reason, perform step 501.
401, the first access device is according to admission control algorithm, and the priority of RRC connection request is set to highest level.
In the present embodiment, at the first access device, judge that UE is redirected to former in UTRAN because during CSFB, in order to guarantee that speech business carries out preferably, improve user and experience, the first access device is according to default admission control algorithm, and the priority of this RRC connection request is set to highest level.
402, the first access device judges whether to allow UE access UTRAN.
Deterministic process can, referring to the record of related content in above-described embodiment, repeat no more herein particularly.If the determination result is NO, perform step 403; If judgment result is that it is execution step 601.
403, whether the first access device judgement refusal number of times exceeds preset times.
Concrete deterministic process can, referring to the record of related content in above-described embodiment, repeat no more herein.Judging refusal number of times while not exceeding preset times, perform step 404.
404, the first access device is revised as False by the value of Pre-redirection info cell.
In the present embodiment, will in RRC connection request, carry Pre-redirection info cell as identification code, when judging refusal UE access UTRAN, the value that the first access device is revised this cell is False, to indicate UE, does not support E-UTRAN.
405, the first access device sends the 3rd RRC connection refused message to UE, the 3rd RRC connection refused message be used to indicate that UE reselects within the default time period for accessing the 3rd frequency of UTRAN.
In the present embodiment, when UE is redirected to former in UTRAN because during CSFB, for the speech business that continues as early as possible, after the cell value of the first access device modification Pre-redirection info cell is False, at the first access device, refuse for the first time after UE access UTRAN, just can directly to UE, issue the 3rd RRC connection refused message, in the 3rd RRC connection refused message, be used to indicate UE and within the default time period, reselect for accessing the 3rd frequency of UTRAN.In the present embodiment owing to having revised the value of Pre-redirection info cell, the first access device just determines UE and does not support E-UTRAN, in such the 3rd RRC connection refused message, can not carry for accessing the second frequency of E-UTRAN yet, thereby UE can not be redirected at once can E-UTRAN in, overcome back and forth redirected ping-pong.
Further, in the present embodiment that the priority-level of RRC connection request corresponding to CSFB is the highest, when the reason because of CSFB causes that UE is redirected to UTRAN from E-UTRAN, in order to realize as soon as possible continuing of speech business, the first access device can be searched for the 3rd frequency by UE in the default time period, continue to initiate circuit domain business, thereby can save the time of circuit domain dropping.
406, the first access device receives the RRC connection request that UE sends on the 3rd frequency.
501, the first access device judges whether to allow UE access UTRAN.
If judged in step 302, cause when UE is redirected to the non-CSFB of reason in UTRAN, the first access device, according to the network state of UTRAN or access principle, judges whether to allow UE access UTRAN.If the determination result is NO, perform step 502; If judgment result is that to be, perform step 601.
502, the first access device is according to the rank of the priority of admission control algorithm rising RRC connection request.
During the general redirected non-CSFB of reason, after RRC connection request is rejected, UE also can attempt again sending RRC connection request to the first access device.In order to guarantee user's experience, in the present embodiment, the first access device is after having refused each time the same RRC connection request that same UE sends, according to the raise rank of priority of this RRC connection request of default admission control algorithm.
503, whether the first access device judgement refusal number of times exceeds preset times.
Concrete deterministic process can, referring to the record of related content in above-described embodiment, repeat no more herein.If judgement refusal number of times does not exceed preset times, perform step 504; If judge refusal number of times, exceed preset times, perform step 506.
504, the first access device is revised as False by the value of Pre-redirection info cell.
505, the first access device sends a RRC connection refused message to UE.
506, the first access device sends the 2nd RRC connection refused message to UE, the 2nd RRC connection refused message is carried for accessing the second frequency of E-UTRAN, so that UE sends RRC connection request to the second access device on the second frequency, so that UE is redirected in E-UTRAN.
In step 503, judge refusal number of times and exceed preset times, the first access device sends the 2nd RRC connection refused message to UE.Wherein, the 2nd RRC connection refused message is carried for accessing the second frequency of E-UTRAN.UE receives after the 2nd RRC connection refused message, can on the second frequency, to the second access device, send RRC connection request, and request is redirected to UE in E-UTRAN.
In the present embodiment, the first access device can also carry refusal indication in the 2nd RRC connection refused message, and this refusal indication is used in reference to the refusal indication that UTRAN refusal UE access is shown.UE can be transmitted to the eNB in E-UTRAN by the second frequency by this refusal indication.After UE is in the second frequency is linked into E-UTRAN, if UE, because of identical redirected reason, in the time of need to being redirected in UTRAN, refuses the UE access of this redirected reason because eNB learns UTRAN, now eNB can not be redirected to this UE in UTRAN again.Preferably, can preset certain time interval, eNB can or not be redirected to UE in UTRAN because of identical redirected reason within this time interval, and wherein, this time interval can have network side to set according to the actual requirements.
Because the first access device has been revised the value of Pre-redirection info cell, judge that UE does not support E-UTRAN, in the RRC connection refused message that the first access device sends to UE, can not carry for accessing the second frequency of E-UTRAN, thereby UE can not be redirected back in E-UTRAN at once, overcome back and forth redirected ping-pong.UE will again send RRC connection request to the first access device on the first frequency like this, and the first access device returns to execution step 301 and subsequent operation, until refusal number of times exceeds preset times or judges, allows in UE access UTRAN.
601, radio bearer is set up in the first access device and UE access.
In step 402 or step 501, when the first access device is judged while allowing UE access UTRAN, the first access device directly and UE set up radio bearer so that UE communicates in UTRAN.
Access device in the present embodiment in UTRAN is judged while not allowing UE access, modification is carried at the value of the identification code in RRC connection request, make access device judge that UE does not support E-UTRAN, thereby to UE, send the RRC connection refused message of not carrying E-UTRAN frequency, UE when refusing its access, UTRAN also cannot be redirected in E-UTRAN again, can only on UTRAN frequency, again to access device, send the RRC connection request of access UTRAN, thereby solved the problem of the ping-pong existing in prior art during being redirected to UTRAN process from E-UTAN, can reduce the waste of Internet resources, and can alleviate network load, be conducive to speech business and data service continue carry out.Further, the present embodiment can also, at UE after the first frequency is repeatedly rejected to the first access device transmission RRC connection request, be redirected to UE in E-UTRAN again.And because CSFB causes that UE is redirected in the situation of UTRAN, when the first access device is refused UE access UTRAN for the first time, the first access device just indicates UE within the default time period, reselects for accessing the frequency of UTRAN, is conducive to realize as soon as possible continuing of speech business.
The structural representation of a kind of network redirection device that Fig. 4 provides for the embodiment of the present invention.As shown in Figure 4, this device comprises: receiver module 41, judge module 42, modified module 43 and sending module 44.
When the signal of E-UTRAN a little less than, and the signal of UTRAN is when stronger, or when the UE in current access E-UTRAN needs carry voice traffic, needing UE to carry out CSFB falls back in UTRAN UE to complete continuing of speech business, now eNB can issue RRC connection release message by this UE, carries for accessing the first frequency of UTRAN in this RRC connection release message.This first frequency is that eNB is the frequency that UE chooses.Wherein, eNB chooses the method for the first frequency, can, referring to the record of related content in above-described embodiment, repeat no more herein.After receiving RRC connection release message, UE is connected release with the RRC between eNB.Now, UE just can be redirected to UTRAN from E-UTRAN.
The network redirection device that the present embodiment provides is the access device in UTRAN, and wherein, this access device can be the RNC in UTRAN.Receiver module 41 in this network redirection device receives the RRC connection request that UE sends on the first frequency, to ask setting up radio bearer with UTRAN.Wherein, RRC connection request comprises the identification code that is used to indicate UE support E-UTRAN.This identification code can be " Pre-redirection info " cell in RRC connection request.In RRC connection request, the cell value of " Pre-redirection info " cell remains " True " always, and cell value illustrates UE for " True " is used to refer to can support E-UTRAN.Wherein, network redirection device can be the RNC in UTRAN.
In the present embodiment, when judge module 42 is judged refusal UE access UTRAN, network redirection device can the cumulative record refusal number of times corresponding with this RRC connection request.Particularly, a counter 40 can be set in this network redirection device, by this counter 40, record the unaccepted number of times of same RRC connection request that same UE sends.In the present embodiment judge module 42 judge for the first time refusal UE be linked into UTRAN in time, counter 40 will be activated, now initial count value is 1.Whenever judge module 42 is judged while refusing UE access UTRAN because of same RRC connection request, counter 40 just need to add 1 on current count value basis, obtains this RRC and connects unaccepted refusal number of times.
After judging refusal UE access UTRAN, judge module 42 further judges whether the refusal number of times of counter 40 records exceeds preset times.If refusal number of times does not exceed preset times, modified module 43 is revised the value of the identification code in RRC connection request.Particularly, the cell value that modified module 43 can " Pre-redirection info " cell is set to " False ".In reality, by the value of IE in " Pre-redirection info " cell " Support of E-UTRAN FDD " and " Support of E-UTRAN TDD " for being all set to " False ".This preset times can be by network configuration, also can by administrative staff according to the actual requirements with experience flexible configuration, general preset times can be 2～3 times.Modified module 43 is connected with sending module 44, and after being revised as the value of identification code, sending module 44 can send a RRC connection refused message to UE, to notify UE network redirection device not allow in its access UTRAN.In the present embodiment, modified module 43, in judging refusal UE access UTRAN and when refusal number of times does not exceed preset times, is modified the value of the identification code carrying in RRC connection request, makes amended identification code indicate UE and does not support E-UTRAN.Sending module 44 connects in refusal request and just can not carry for accessing the frequency of E-UTRAN at a RRC who sends to UE like this, thereby UE just cannot refuse, after its access, to be redirected in E-UTRAN at once at UTRAN network.
In the present embodiment, owing to not carrying in a RRC connection request for accessing the frequency of E-UTRAN, after receiving a RRC connection refusal request, UE can only continue again to receive UE to the receiver module 41 in network redirection device and send RRC connection request on the first frequency, request is set up radio bearer with UTRAN again, so that the continuing of business.
Whenever receiver module 41 receives after RRC connection request, judge module 42 will re-execute and judge whether to allow UE access UTRAN, and when judging refusal UE access UTRAN and refusal number of times at every turn and not exceeding preset times, modified module 43 is revised the value of identification code in RRC connection request, at each modified module 43, revised after the value of identification code, sending module 44 sends a RRC connection request to UE, until refusal number of times exceeds preset times or the first access device is judged in permission UE access UTRAN.
The network redirection device that the present embodiment provides, sending module receives the RRC connection request that UE sends on the first frequency for UTRAN, RRC connection request comprises the identification code that is used to indicate UE support E-UTRAN, the first frequency is carried in the RRC connection release message that the second access device sends to UE, judge module judges whether to allow UE access UTRAN, if the determination result is NO and refusal number of times does not exceed preset times, the value of modified module modified logo code, with indication, UE does not support E-UTRAN, and send a RRC connection refused message to UE, receiver module receives the RRC connection request that UE resends on the first frequency, and re-execute and judge whether to allow UE access UTRAN and subsequent operation, until exceeding preset times or judge, refusal number of times allows in UE access UTRAN.
Access device in the present embodiment in UTRAN is judged while not allowing UE access, modification is carried at the value of the identification code in RRC connection request, make access device judge that UE does not support E-UTRAN, thereby to UE, send the RRC connection refused message of not carrying E-UTRAN frequency, UE when refusing its access, UTRAN also cannot be redirected in E-UTRAN again, can only on UTRAN frequency, again to access device, send the RRC connection request of access UTRAN, thereby solved the problem of the ping-pong existing in prior art during being redirected to UTRAN process from E-UTAN, can reduce the waste of Internet resources, and can alleviate network load, be conducive to speech business and data service continue carry out.
The structural representation of the another kind of network redirection device that Fig. 5 provides for the embodiment of the present invention.As shown in Figure 5, this device comprises: receiver module 51, judge module 52, modified module 53, maintenance module 54 and sending module 55.
Particularly, when UE need to be redirected to UTRAN from E-UTRAN, eNB can send a RRC connection release message to UE, carries UE for accessing the first frequency of UTRAN in this RRC connection release message.After receiving RRC connection release message, the wireless connections between UE and eNB will be released.
Receiver module 51 receives the RRC connection request that UE sends on the first frequency, at this RRC connection request, comprises and is used to indicate the identification code that UE supports E-UTRAN, and particularly, this identification code is " Pre-redirection info " cell.
After receiving RRC connection request, judge module 52 judges according to the offered load situation of UTRAN or access principle etc., to determine whether allowing UE to access in UTRAN.For example, at the offered load of UTRAN, during in saturation condition, judge and do not allow UE access UTRAN.
In the present embodiment, network redirection device also comprises a counter 50, the unaccepted refusal number of times of same RRC connection request sending for recording same UE.Judge module 52, after judging refusal UE access UTRAN, needs further judgement refusal number of times whether to exceed preset times.If judge refusal number of times, do not exceed preset times, modified module 53 is revised the value that is carried at identification code in RRC connection request, to indicate UE, does not support E-UTRAN.
Sending module 55 is connected with modified module 53, and after the value of identification code is modified, sending module 55 sends a RRC connection refused message to UE.In the present embodiment, because indicating UE, the value of amended identification code do not support E-UTRAN, in the RRC connection refused message sending to UE at sending module 55, do not carry for accessing the frequency of E-UTRAN, after receiving a RRC connection refused message, UE still can send RRC connection request to receiver module 51 on the first frequency.
And when judge module 52 is judged refusal number of times over preset times, keeping module 54 for keeping the value of RRC connection request identification code, modified module 53 is the value of modified logo code no longer.Keep module 54 to be connected with sending module 55, in the present embodiment, when the value that keeps module 54 maintenance identification codes is constant, sending module 55 sends the 2nd RRC connection refused message to UE, the 2nd RRC connection refused message is carried for accessing the second frequency of E-UTRAN, UE on the second frequency to the second access device the eNB in E-UTRAN send RRC connection request, so that UE is redirected in E-UTRAN.
Wherein, can also carry refusal indication in the 2nd RRC connection refused message, this refusal indication is used in reference to the refusal indication that UTRAN refusal UE access is shown.UE can be transmitted to eNB by the second frequency by this refusal indication.After UE is in the second frequency is linked into E-UTRAN, if UE, because of identical redirected reason, in the time of need to being redirected in UTRAN, refuses the UE access of this redirected reason because eNB learns UTRAN, now eNB can not be redirected to this UE in UTRAN again.Preferably, can preset certain time interval, eNB can or not be redirected to UE in UTRAN because of identical redirected reason within this time interval, and wherein, this time interval can have network side to set according to the actual requirements.
Access device in the present embodiment in UTRAN is judged while not allowing UE access, modification is carried at the value of the identification code in RRC connection request, make access device judge that UE does not support E-UTRAN, thereby to UE, send the RRC connection refused message of not carrying E-UTRAN frequency, UE when refusing its access, UTRAN also cannot be redirected in E-UTRAN again, can only on UTRAN frequency, again to access device, send the RRC connection request of access UTRAN, thereby solved the ping-pong existing in prior art during being redirected to UTRAN process from E-UTAN, can reduce the waste of Internet resources, and can alleviate network load, be conducive to speech business and data service continue carry out.
The structural representation of the another kind of network redirection device that Fig. 6 provides for the embodiment of the present invention.As shown in Figure 6, this device comprises: counter 60, receiver module 61, judge module 62, modified module 63, keep module 64, receive control module 65, sending module 66 and reselect module 67.
Particularly, at UE for accessing the RRC connection request sending on the first frequency of UTRAN.Wherein, RRC connection request not only comprises the identification code that is used to indicate UE support E-UTRAN, also comprises being used in reference to the type codes that UE is redirected to the reason of UTRAN is shown.In the present embodiment, for different redirected reasons, different type codes is set in advance.About the first frequency, to be redirected introduction and the explanation of reason, can, referring to the record of related content in above-described embodiment, repeat no more herein.
UE need to when E-UTRAN is redirected to UTRAN, can be carried in the RRC connection request sending to receiver module 61 being redirected type codes corresponding to reason.After receiving RRC connection request, judge module 62 can identify UE and be redirected to the reason in UTRAN according to the type codes of carrying in this RRC connection request, and whether judge module 62 can further be judged redirected reason is CSFB.
In the present embodiment, if judge module 62 is judged, be redirected former because CSFB, in order to guarantee that speech business carries out preferably, improve user and experience, receive the priority of control module 65 RRC connection requests to be set to highest level.Further, judge module 62 continues to judge whether to allow UE access UTRAN.If judged in refusal UE access UTRAN, whether judge module 62 further judgement refusal number of times exceeds preset times.Wherein, the unaccepted number of times of same RRC connection request that counter 60 sends for recording same UE.Concrete deterministic process can, referring to the record of related content in above-described embodiment, repeat no more herein.
And if judge module 62 is judged in permission UE access UTRAN, set up radio bearer between UE and UTRAN.
In the present embodiment, when UE is redirected to former in UTRAN because during CSFB, for the speech business that continues as early as possible, the cell value of " Pre-redirection info " is being revised as after " False ", after refusing for the first time UE access UTRAN, reselect module 67 by for being redirected the RRC connection request that reason is CSFB, reselect for accessing the 3rd frequency of UTRAN, then sending module 66 directly issues the 3rd RRC connection refused message to UE.Wherein, the 3rd RRC connection refused message is used to indicate UE and within the default time period, reselects for accessing the 3rd frequency of UTRAN.UE will send to receiver module 61 and send RRC connection request on the 3rd frequency.
In the present embodiment owing to having revised the cell value of " Pre-redirection info ", represent that UE does not support E-UTRAN, in the 3rd RRC connection refused message that sending module 66 sends like this, do not carry for accessing the second frequency of E-UTRAN, thereby UE can not be redirected back in E-UTRAN at once, has overcome the ping-pong existing in redirection process.
Further, in the present embodiment that the priority-level of RRC connection request corresponding to CSFB is the highest, when the reason because of CSFB causes that UE is redirected to UTRAN from E-UTRAN, in order to realize as soon as possible continuing of speech business, in the first access device, reselect module 67 and can search for the 3rd frequency for UE, make UE within the default time period, on the 3rd frequency, continue to initiate circuit domain business, thereby can save the time of circuit domain dropping.
If judge module 62 is judged refusal, number of times exceeds preset times, keeps 64 of modules to keep the value of identification code in RRC connection request constant, keeps module 64 to keep the cell value of " Pre-redirection info " to be revised as " True ".
General when the non-CSFB of redirected reason, after RRC connection request is rejected, UE may also can attempt sending RRC connection request to receiver module 61.In order to guarantee user's experience, in the present embodiment, receive the control module 65 can be after having refused each time the same RRC connection request that same UE sends, according to the raise rank of priority of this RRC connection request of default admission control algorithm.
Further, whether judge module 62 judgement refusal number of times exceed preset times, and concrete deterministic process can, referring to the record of related content in above-described embodiment, repeat no more herein.If judgement refusal number of times does not exceed preset times, modified module 63 is revised as " False " by the cell value of " Pre-redirection info ", then by sending module 66, to UE, sends a RRC connection refused message.
In the present embodiment owing to having revised the cell value of " Pre-redirection info ", judge that UE does not support E-UTRAN, in the RRC connection refused message sending to UE, can not carry for accessing the second frequency of E-UTRAN, thereby UE can not be redirected at once can E-UTRAN in, overcome back and forth redirected ping-pong.UE will again send RRC connection request on the first frequency like this, until refusal number of times exceeds preset times or judges, allows in UE access UTRAN.
Access device in the present embodiment in UTRAN is judged while not allowing UE access, modification is carried at the value of the identification code in RRC connection request, make access device judge that UE does not support E-UTRAN, thereby to UE, send the RRC connection refused message of not carrying E-UTRAN frequency, UE when refusing its access, UTRAN also cannot be redirected in E-UTRAN again, can only on UTRAN frequency, again to access device, send the RRC connection request of access UTRAN, thereby solved the ping-pong existing in prior art during being redirected to UTRAN process from E-UTAN, can reduce the waste of Internet resources, and can alleviate network load, be conducive to speech business and data service continue carry out.
Further, the present embodiment can also, at UE after the first frequency is repeatedly rejected to the first access device transmission RRC connection request, be redirected to UE in E-UTRAN again.And because CSFB causes that UE is redirected in the situation of UTRAN, when the first access device is refused UE access UTRAN for the first time, the first access device just indicates UE within the default time period, reselects for accessing the frequency of UTRAN, is conducive to realize as soon as possible continuing of speech business.
Each functional module of the network redirection device that the present embodiment provides can be used for carrying out the flow process of the network redirection method shown in above-mentioned related embodiment, and its specific works principle repeats no more, and refers to the description of embodiment of the method.
Finally it should be noted that: each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit above; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a network redirection method, is characterized in that, comprising:
The first access device receives user equipment (UE) for accessing the radio resource control RRC connection request sending on the first frequency of general land wireless network UTRAN; Described RRC connection request comprises the identification code that is used to indicate described UE support evolved universal terrestrial wireless network E-UTRAN; Wherein, described the first frequency is carried in the RRC connection release message that the second access device sends to described UE;
Described the first access device judges whether to allow described UE to access described UTRAN;
If the determination result is NO and refusal number of times does not exceed preset times, described the first access device is revised the value of described identification code, to indicate described UE not support E-UTRAN;
Described the first access device sends a RRC connection refused message to described UE;
Described the first access device receives the described RRC connection request that described UE resends on described the first frequency, and re-execute and judge whether to allow described UE to access described UTRAN and subsequent operation, until exceeding described preset times or judge, described refusal number of times allow described UE to access in described UTRAN.
2. network redirection method according to claim 1, is characterized in that, also comprises:
At described refusal number of times, exceed described threshold value, described the first access device keeps the value of described identification code;
Described the first access device sends the 2nd RRC connection refused message to described UE, described the 2nd RRC connection refused message is carried for accessing the second frequency of E-UTRAN, so that described UE sends and sends described RRC connection request to described the second access device on described the second frequency, so that described UE is redirected in described E-UTRAN.
3. network redirection method according to claim 2, is characterized in that, described RRC connection request also comprises being used in reference to the type codes that described UE is redirected to the reason of described UTRAN is shown;
Described the first access device judges whether to allow described UE to access described UTRAN to comprise:
Described the first access device judges according to described type codes whether the reason that described UE is redirected in described UTRAN is circuit domain dropping CSFB;
If described former because described CSFB, described the first access device is according to admission control algorithm, and the priority of described RRC connection request is set to highest level;
Described the first access device judges whether to allow described UE to access described UTRAN;
Described the first access device also comprises after revising the value of described identification code:
Described the first access device sends the 3rd RRC connection refused message to described UE, and wherein, described the 3rd RRC connection message is used to indicate described UE and within the default time period, reselects for accessing the 3rd frequency of described UTRAN;
Described the first access device receives the described RRC connection request that described UE sends on described the 3rd frequency.
4. network redirection method according to claim 3, is characterized in that, also comprises:
If the non-described CSFB of described reason, described the first access device, after judging refusal described UE accesses described UTRAN, also comprises:
Described the first access device is according to the raise rank of priority of described RRC connection request of described admission control algorithm.
5. according to the network redirection method described in claim 1-4 any one, it is characterized in that, described identification code is the pre-cell " Pre-Redirection info " that is redirected;
The value that described the first access device is revised described identification code comprises:
Described the first access device is revised as " False " by the cell value of described " Pre-Redirection info ".
6. a network redirection device, is characterized in that, comprising:
Receiver module, for repeating to receive user equipment (UE) for accessing the radio resource control RRC connection request sending on the first frequency of general land wireless network UTRAN; Described RRC connection request comprises the identification code that is used to indicate described UE support evolved universal terrestrial wireless network E-UTRAN, until refusal number of times exceeds preset times or judges, allows described UE to access in described UTRAN; Wherein, described the first frequency is carried in the RRC connection release message that the second access device sends to described UE;
Judge module, for receive at described receiver module after described RRC connection request message at every turn, judges whether to allow described UE to access described UTRAN;
Modified module, when accessing described UTRAN and described refusal number of times and do not exceed described preset times for judge the described UE of refusal at described judge module at every turn, revises the value of described identification code, to indicate described UE not support E-UTRAN;
Sending module, after the value at the described identification code of the each modification of described modified module, sends a RRC connection refused message to described UE, so that described UE resends described RRC connection request on described the first frequency.
7. network redirection device according to claim 6, is characterized in that, also comprises:
Keep module, for exceeding described threshold value at described refusal number of times, keep the value of described identification code;
Described sending module, also for after keeping the value of described identification code, to described UE, send the 2nd RRC connection refused message, so that described UE sends described RRC connection request to described the second access device on the second frequency, so that described UE is redirected in described E-UTRAN; Wherein, described the 2nd RRC connection refused message is carried for accessing described the second frequency of E-UTRAN.
8. network redirection device according to claim 7, is characterized in that, described RRC connection request also comprises being used in reference to the type codes that described UE is redirected to the reason in described UTRAN is shown;
Receive control module, for judging whether to allow at described judge module before described UE accesses described UTRAN, according to described type codes, judge whether the reason that described UE is redirected in described UTRAN is circuit domain dropping CSFB, if described former because described CSFB is set to highest level according to the priority of the described RRC connection request of admission control algorithm;
Reselect module, for described modified module revise described identification code value after, by described sending module, to described UE, send the 3rd RRC connection refused message, wherein, described the 3rd RRC connection message is used to indicate described UE and within the default time period, reselects for accessing the 3rd frequency of described UTRAN, and receives the described RRC connection request that described UE sends on described the 3rd frequency.
9. network redirection device according to claim 8, is characterized in that, also comprises:
Described receiving control module, if also for the non-described CSFB of described reason, after described judge module is judged refusal described UE accessed described UTRAN, according to the raise rank of priority of described RRC connection request of admission control algorithm.
10. according to the network redirection device described in claim 6-9 any one, it is characterized in that, described identification code is the pre-cell " Pre-Redirection info " that is redirected;
Described modified module, specifically for when judging the described UE of refusal and access described UTRAN and described refusal number of times and do not exceed described preset times, is revised as " False " by the cell value of described " Pre-Redirection info ".
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