CN103220736A - Selection method and device for re-established target cell of RRC connection re-establishment - Google Patents
Selection method and device for re-established target cell of RRC connection re-establishment Download PDFInfo
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Abstract
The invention provides a selection method and device for a re-established target cell of RRC connection re-establishment. The fact that the selected re-established target cell has a user equipment (UE) context is ensured, and therefore the problem that due to the fact that a re-established target cell does not have a UE context, the RRC connection re-establishment fails in an RRC connection re-establishment process is avoided, and the success rate of the RRC connection re-establishment is improved.
Description
Technical field
The present invention relates to the mobile communication technology field, particularly a kind of reconstructed object cell selecting method and device of RRC connection reconstruction.
Background technology
Long Term Evolution (Long Term Evolution, LTE) system adopts flat network configuration, it comprises: the universal mobile telecommunications system wireless access network of evolution (Evolved Universal Terrestrial Radio Access Network, E-UTRAN) and Evolved Packet Core (Evolved Packet Core-network, EPC).(evolved NodeB eNB) constitutes E-UTRAN, and each eNB comprises a plurality of sub-districts by the base station; EPC comprise gateway (Serving Gateway, S-GW) and Mobility Management Entity (Mobility Management Entity, MME).Wherein, link to each other by X2 interface between the eNB, X2 interface be used to finish user terminal under state of activation the mobile management function and the information interaction between the eNB of equity.Link to each other by the S1 interface between eNB and the EPC, wherein, the interface between eNB and the MME is expressed as S1-MME, is used to finish the chain of command function of mobile management and S1 interface; Interface between eNB and the S-GW is expressed as S1-U, is used to finish the function such as route, transmission of user data.
In the LTE system; in order to make mobile communication system have higher reliability; satisfy professional continuity; give the good business experience of user; be in user terminal (the User Equipment under the RRC connection status (RRC_CONNECTED); UE) detect Radio Link Failure, handoff failure, the failure of bottom integrity protection, when RRC connects reasons such as reshuffling (RRC connection reconfiguration) failure; UE does not directly withdraw from the RRC connection status, but carries out RRC connection reconstruction (RRC connection Re-establishment) process.UE (does not hereinafter have the words that specify, this UE all refers in particular to the UE that need carry out the RRC connection reconstruction, rather than general reference) when the RRC connection reconstruction, need select a suitable E-UTRAN sub-district, be called the reconstructed object sub-district, the reconstructed object sub-district can be the cell-of-origin, be UE carry out before the RRC connection reconstruction resident sub-district, also can be other sub-districts that are different from the cell-of-origin.
The prerequisite of RRC connection reconstruction success must be that the reconstructed object sub-district is ready sub-district (Prepared Cell), be that the reconstructed object sub-district has the effective context of UE (UE context), the UE context comprises the security capabilities (security capability) of current UE, the security information (AS security information) of Access Layer, RAB E-RAB (the E-UTRAN Radio Access Bearer) information that UE sets up, the information (RRC context) relevant with the RRC connection management etc.The reconstructed object sub-district can be the UE distributing radio resource according to the UE context that is had directly.UE at first hangs up the every other Signaling Radio Bearer (SRB except Signaling Radio Bearer 0 (SRB0) when the RRC connection reconstruction, comprise SRB1 and SRB2) and Data Radio Bearer (DRB), by the RRC connection reconstruction, UE can not need to return the RRC_IDLE attitude and directly recover Signaling Radio Bearer 1 (SRB1), and then the Radio Resource of the UE context configuration/reconfiguration UE that is had according to the reconstructed object sub-district, realize professional continuity, give the good business experience of user.
Promptly have only when the reconstructed object sub-district of selecting and have UE contextual the time, RRC connection reconstruction process just may success.And at present when carrying out the RRC connection reconstruction, UE only is according to the signal quality ordering, selects the best sub-district of signal quality resident, and initiates RRC connection reconstruction process.Like this, in case the sub-district of selecting does not have the UE context, RRC connection reconstruction process just must be failed so.
Known, in present LTE system, be in the UE of RRC connection status, its UE context is stored among the eNB of the current persistent district of UE institute subordinate, when striding the eNB switching, source eNB (eNB of the current persistent district of UE institute subordinate) can give this UE context transfer the eNB (switching target eNB hereinafter referred to as) of switching target small area institute subordinate, promptly have only the UE context that stores this UE among these two eNB usually, further, have only sub-district under these two eNB can obtain the UE context of this UE.Therefore, when UE only is according to the signal quality ordering, select the best sub-district of signal quality resident, and when initiating RRC connection reconstruction process, this is a process at random, and it often may select the not contextual sub-district of UE of this UE, thereby causes RRC connection reconstruction procedure failure.
For example: if UE initiates reconstructed object cell selecting process because of Radio Link Failure, sub-district and the cell-of-origin that have only UE to select this moment belong to an eNB, and RRC connection reconstruction process just may success.Because terminal is not also known the sub-district and the subordinate relation of eNB, so in case selected sub-district under the different e NB, RRC connection reconstruction process must be failed so.If for the reconstructed object sub-district that guarantees to select belongs to same eNB, and select the cell-of-origin to carry out RRC connection reconstruction process, when considering terminal generation Radio Link Failure so, often the cell-of-origin signal quality is poor, still adhering to selecting the cell-of-origin to carry out RRC connection reconstruction process in this case, obviously is not optimum scheme.
Similar scene, when UE causes carrying out the reconstructed object cell selecting owing to handoff failure, the context of UE has storage in the eNB at cell-of-origin and switching target small area place, if in order to ensure the eNB at the place of selecting, reconstructed object sub-district have the UE context of this UE, UE can only select the Target cell that switches or switch before the cell-of-origin; Consider when switching, because the cell-of-origin has not met the normal resident condition of UE, therefore select the cell-of-origin resident RRC of carrying out connection reconstruction process and improper often; And switch to the Target cell failure, and this access Target cell existing problems have been described, therefore selecting this access Target cell to carry out RRC connection reconstruction process as the reconstructed object sub-district neither optimum scheme.
Summary of the invention
The object of the present invention is to provide a kind of reconstructed object cell selecting method and device of RRC connection reconstruction, to solve in the prior art, RRC connection reconstruction process does not cause the problem of RRC connection reconstruction failure because of the reconstructed object sub-district has the UE context.
For solving the problems of the technologies described above, the invention provides a kind of reconstructed object cell selecting method of RRC connection reconstruction, comprising:
Step 1: obtain ID with the contextual eNB of UE;
Step 2: the ID of the eNB of the alternative cell institute subordinate of RRC connection reconstruction is compared with the ID with the contextual eNB of UE, if comparative result is identical, then execution in step 3; If the comparative result difference, then execution in step 4;
Step 3: elect this alternative cell as the reconstructed object sub-district, the reconstructed object cell selecting finishes;
Step 4: return execution in step 2, till selecting the reconstructed object sub-district or not having alternative cell.
Optionally, in the reconstructed object cell selecting method of described RRC connection reconstruction, the quantity of described alternative cell is a plurality of.
Optionally, in the reconstructed object cell selecting method of described RRC connection reconstruction, in a plurality of alternative cell, the ID of the eNB of the measured sub-district of relative signal matter institute subordinate is preferential to be compared with the ID with the contextual eNB of UE.
Optionally, in the reconstructed object cell selecting method of described RRC connection reconstruction, the contextual eNB of the described UE of having comprises: source eNB and/or switching target eNB.
Optionally, in the reconstructed object cell selecting method of described RRC connection reconstruction, the acquisition methods of the ID of described eNB comprises:
In the system message of Cell Broadcast CB, increase the ID of the eNB of this sub-district institute subordinate;
UE reads the system message of Cell Broadcast CB, with the ID of the eNB that obtains this sub-district institute subordinate.
The present invention also provides a kind of reconstructed object cell selecting apparatus of RRC connection reconstruction, comprising:
The ID acquisition module is in order to obtain the ID with the contextual eNB of UE;
Comparison module compares with the ID with the contextual eNB of UE in order to the ID with the eNB of the alternative cell institute subordinate of RRC connection reconstruction;
First processing module in order under the identical situation of comparative result, is elected this alternative cell as the reconstructed object sub-district, and finishes the reconstructed object cell selecting;
Second processing module in order under the different situation of comparative result, is restarted comparison module, till selecting the reconstructed object sub-district or not having alternative cell.
The present invention also provides a kind of reconstructed object cell selecting method of RRC connection reconstruction, comprising:
Obtain and have the contextual a plurality of sub-districts of UE;
Select a sub-district in these a plurality of sub-districts as the reconstructed object sub-district.
Optionally, in the reconstructed object cell selecting method of described RRC connection reconstruction, UE obtains by the RRC signaling has the contextual a plurality of sub-districts of UE.
Optionally, in the reconstructed object cell selecting method of described RRC connection reconstruction, these a plurality of sub-districts are subordinated to source eNB or switching target eNB.
Optionally, in the reconstructed object cell selecting method of described RRC connection reconstruction, select in these a plurality of sub-districts the measured sub-district of relative signal matter as the reconstructed object sub-district.
The present invention also provides a kind of reconstructed object cell selecting apparatus of RRC connection reconstruction, comprising:
The sub-district acquisition module has the contextual a plurality of sub-districts of UE in order to obtain;
Select module, in order to select a sub-district in these a plurality of sub-districts as the reconstructed object sub-district.
In the reconstructed object cell selecting method and device of RRC connection reconstruction provided by the invention, by guaranteeing that the gravity treatment Target cell of selecting has the UE context, thereby avoided RRC connection reconstruction process because of the problem that the reconstructed object sub-district does not have the UE context to cause the RRC connection reconstruction to be failed, improved the success rate of RRC connection reconstruction.
Description of drawings
Fig. 1 is the schematic flow sheet of reconstructed object cell selecting method of the RRC connection reconstruction of the embodiment of the invention one;
Fig. 2 is the mount structure schematic diagram of reconstructed object cell selecting apparatus of the RRC connection reconstruction of the embodiment of the invention one;
Fig. 3 is the schematic flow sheet of reconstructed object cell selecting method of the RRC connection reconstruction of the embodiment of the invention two;
Fig. 4 is the mount structure schematic diagram of reconstructed object cell selecting apparatus of the RRC connection reconstruction of the embodiment of the invention two.
Embodiment
Be described in further detail below in conjunction with the reconstructed object cell selecting method and the device of the drawings and specific embodiments RRC connection reconstruction provided by the invention.According to the following describes and claims, advantages and features of the invention will be clearer.It should be noted that accompanying drawing all adopts very the form of simplifying, only in order to convenient, the purpose of the aid illustration embodiment of the invention lucidly.
Embodiment one
Please refer to Fig. 1, it is the schematic flow sheet of reconstructed object cell selecting method of the RRC connection reconstruction of the embodiment of the invention one.As shown in Figure 1, the reconstructed object cell selecting method of described RRC connection reconstruction comprises:
Step 1: obtain ID with the contextual eNB of UE;
Step 2: the ID of the eNB of the alternative cell institute subordinate of RRC connection reconstruction is compared with the ID with the contextual eNB of UE, if comparative result is identical, then execution in step 3; If the comparative result difference, then execution in step 4;
Step 3: elect this alternative cell as the reconstructed object sub-district, the reconstructed object cell selecting finishes;
Step 4: return execution in step 2, till selecting the reconstructed object sub-district or not having alternative cell.
Accordingly, in the present embodiment, also provide the reconstructed object cell selecting apparatus of RRC connection reconstruction.Please refer to Fig. 2, it is the mount structure schematic diagram of reconstructed object cell selecting apparatus of the RRC connection reconstruction of the embodiment of the invention one.As shown in Figure 2, the reconstructed object cell selecting apparatus of described RRC connection reconstruction comprises:
First processing module 22 in order under the identical situation of comparative result, is elected this alternative cell as the reconstructed object sub-district, and finishes the reconstructed object cell selecting;
At this, the quantity of described alternative cell is a plurality of, and it obtains for the signal quality search of sub-district by UE usually.These a plurality of alternative cell are arranged by the signal quality quality in turn at the UE end, and promptly the best alternative cell of signal quality ranked first, and signal quality time good alternative cell ranked second ... the rest may be inferred.
And when the ID that utilizes comparison module 21 with the eNB of the alternative cell institute subordinate of RRC connection reconstruction compared with the ID with the contextual eNB of UE, the ID of the eNB of promptly at first that signal quality is best alternative cell institute subordinate and the ID with the contextual eNB of UE compared.At this moment, the ID of the eNB of the alternative cell institute subordinate best as if this signal quality is identical with the ID with the contextual eNB of UE, then utilizes first processing module 22 alternative cell that this signal quality is best to elect the reconstructed object sub-district as.Because the UE context is stored under the eNB, and the arbitrary sub-district under this eNB all can obtain this UE context.Thus, selected reconstructed object sub-district not only can guarantee to have the UE context, thereby has avoided RRC connection reconstruction process because of the problem that the reconstructed object sub-district does not have the UE context to cause the RRC connection reconstruction to be failed, and has improved the success rate of RRC connection reconstruction.Further, its still can the sub-district of RRC connection reconstruction success in the best sub-district of signal quality, thereby improved RRC connection reconstruction success rate and follow-up communication quality more.
If the ID of the eNB of the alternative cell institute subordinate that this signal quality is best is different with the ID with the contextual eNB of UE, then utilize second processing module 23 to restart comparison module 21, promptly utilize once more the ID of the eNB of the comparison module 21 alternative cell institute subordinate that signal quality is time good to compare with ID with the contextual eNB of UE.Same, if the ID of the eNB of time good alternative cell institute subordinate of this signal quality is identical with the ID with the contextual eNB of UE, then utilize first processing module 22 just to elect the inferior good alternative cell of this signal quality as the reconstructed object sub-district.Thus, selected reconstructed object sub-district not only can guarantee to have the UE context, thereby has avoided RRC connection reconstruction process because of the problem that the reconstructed object sub-district does not have the UE context to cause the RRC connection reconstruction to be failed, and has improved the success rate of RRC connection reconstruction.Further, its still can the sub-district of RRC connection reconstruction success in signal quality best sub-district (because this moment, the best sub-district of signal quality does not have the UE context, it has belonged to the sub-district that the RRC connection reconstruction can not be successful, thereby this signal quality time good sub-district just become can the sub-district of RRC connection reconstruction success in the best sub-district of signal quality), thereby improved RRC connection reconstruction success rate and follow-up communication quality more.
Certainly, if the ID of the eNB of the alternative cell institute subordinate that this signal quality is time good is different with the ID with the contextual eNB of UE, the ID of the eNB of the good alternative cell institute subordinate of signal quality the 3rd will be compared with the ID with the contextual eNB of UE, the rest may be inferred, guarantee to have the contextual gravity treatment Target cell of UE until selecting, perhaps do not have till the alternative cell.Guarantee to have the situation of the contextual gravity treatment Target cell of UE for not selecting, the application does not do qualification to this.Can be following processing: UE and directly abandon RRC connection reconstruction process, discharge RRC and connect, return the IDLE state, select an any appropriate sub-district to carry out resident.
In addition, also provide acquisition methods in the present embodiment for the ID of eNB.At this, relate to and obtain ID with the contextual eNB of UE, and when the ID with the eNB of the alternative cell institute subordinate of RRC connection reconstruction compares with the ID with the contextual eNB of UE, the problem of obtaining of the ID of the inevitable eNB that also relate to alternative cell institute subordinate.The acquisition methods of the ID of this two class eNB is identical similar in other words, mainly comprises:
In the system message of Cell Broadcast CB, increase the ID of the eNB of this sub-district institute subordinate;
UE reads the system message of Cell Broadcast CB, with the ID of the eNB that obtains this sub-district institute subordinate.
Concrete, in the system message of the Cell Broadcast CB of persistent district, switching target small area when switching and alternative cell, all increase the respectively ID of the eNB of this sub-district institute subordinate, promptly all increased the ID of the eNB of its subordinate in the system message of the Cell Broadcast CB of persistent district; All increased the ID of the eNB of its subordinate in the system message of the Cell Broadcast CB of switching target small area; All increased the ID of the eNB of its subordinate in the system message of the Cell Broadcast CB of alternative cell.
When obtaining ID with the contextual eNB of UE, utilize ID acquisition module 20 to read the system message of the Cell Broadcast CB of cell-of-origin and/or switching target small area (when switching), just can obtain the ID of the contextual eNB of UE, promptly obtained the ID of source eNB and/or switching target eNB, and these two eNB must have the UE context.
When the ID with the eNB of the alternative cell institute subordinate of RRC connection reconstruction compares with the ID with the contextual eNB of UE, when needing the ID of eNB of alternative cell institute subordinate, UE reads the system message of the Cell Broadcast CB of alternative cell, just can obtain the ID of the eNB of this alternative cell institute subordinate.
Embodiment two
Please refer to Fig. 3, it is the schematic flow sheet of reconstructed object cell selecting method of the RRC connection reconstruction of the embodiment of the invention two.As shown in Figure 3, the reconstructed object cell selecting method of described RRC connection reconstruction comprises:
S30: obtain and have the contextual a plurality of sub-districts of UE;
S31: select a sub-district in these a plurality of sub-districts as the reconstructed object sub-district.
Accordingly, in the present embodiment, also provide the reconstructed object cell selecting apparatus of RRC connection reconstruction.Please refer to Fig. 4, it is the mount structure schematic diagram of reconstructed object cell selecting apparatus of the RRC connection reconstruction of the embodiment of the invention two.As shown in Figure 4, the reconstructed object cell selecting apparatus of described RRC connection reconstruction comprises:
At this, the sub-district acquisition module 40 of UE obtains by the RRC signaling has the contextual a plurality of sub-districts of UE, and described RRC signaling for example is: (RRC connection reconfiguration) reshuffled in the RRC connection.Concrete, when UE resides in current cell-of-origin, utilize the RRC signaling to obtain all sub-districts that are subordinated to same eNB with this cell-of-origin, because the eNB of cell-of-origin institute subordinate must have the UE context, therefore, all sub-districts that are subordinated to same eNB with this cell-of-origin also must obtain this UE context, and promptly these a plurality of sub-districts have the UE context.In addition, when switching, because the eNB of switching target small area institute subordinate will obtain the UE context, thereby utilize the RRC signaling to obtain all sub-districts that are subordinated to same eNB with this switching target small area, all sub-districts that these and this switching target small area is subordinated to same eNB also must have the UE context.
Obtain have the contextual a plurality of sub-districts of UE after, utilize to select module 41 from these a plurality of sub-districts, to choose a sub-district as the reconstructed object sub-district.At this, select in these a plurality of sub-districts the measured sub-district of relative signal matter as the reconstructed object sub-district.Thus, selected reconstructed object sub-district not only can guarantee to have the UE context, thereby has avoided RRC connection reconstruction process because of the problem that the reconstructed object sub-district does not have the UE context to cause the RRC connection reconstruction to be failed, and has improved the success rate of RRC connection reconstruction.Further, its still can the sub-district of RRC connection reconstruction success in the best sub-district of signal quality, thereby improved RRC connection reconstruction success rate and follow-up communication quality more.
Further, when the failure that switches, in the time that the RRC connection reconstruction need being carried out, earlier choose a reconstructed object sub-district from being subordinated to all sub-districts of same eNB with this switching target small area.At this, consider that the switching of striding eNB is not often because have proper cell among the eNB of source, therefore, in order further to improve the success rate of RRC connection reconstruction, when the failure that switches, in the time that the RRC connection reconstruction need being carried out, earlier choose a reconstructed object sub-district from being subordinated to all sub-districts of same eNB with this switching target small area.
In addition, when carrying out the RRC connection reconstruction with the contextual reconstructed object of the UE sub-district of choosing that has, the processing mode the when situation of RRC connection reconstruction failure still takes place, the application does not do qualification to this.Can do following processing: terminal is directly abandoned RRC connection reconstruction process, discharges RRC and connects, and returns the IDLE state, selects an any appropriate sub-district to carry out resident.
To sum up, in the reconstructed object cell selecting method and device of RRC connection reconstruction provided by the invention, by guaranteeing that the gravity treatment Target cell of selecting has the UE context, thereby avoided RRC connection reconstruction process because of the problem that the reconstructed object sub-district does not have the UE context to cause the RRC connection reconstruction to be failed, improved the success rate of RRC connection reconstruction.
Foregoing description only is the description to preferred embodiment of the present invention, is not any qualification to the scope of the invention, and any change, modification that the those of ordinary skill in field of the present invention is done according to above-mentioned disclosure all belong to the protection range of claims.
Claims (11)
1. the reconstructed object cell selecting method of a RRC connection reconstruction is characterized in that, comprising:
Step 1: obtain ID with the contextual eNB of UE;
Step 2: the ID of the eNB of the alternative cell institute subordinate of RRC connection reconstruction is compared with the ID with the contextual eNB of UE, if comparative result is identical, then execution in step 3; If the comparative result difference, then execution in step 4;
Step 3: elect this alternative cell as the reconstructed object sub-district, the reconstructed object cell selecting finishes;
Step 4: return execution in step 2, till selecting the reconstructed object sub-district or not having alternative cell.
2. the reconstructed object cell selecting method of RRC connection reconstruction as claimed in claim 1 is characterized in that, the quantity of described alternative cell is a plurality of.
3. the reconstructed object cell selecting method of RRC connection reconstruction as claimed in claim 2 is characterized in that, in a plurality of alternative cell, the ID of the eNB of the measured sub-district of relative signal matter institute subordinate is preferential to be compared with the ID with the contextual eNB of UE.
4. as the reconstructed object cell selecting method of each the described RRC connection reconstruction in the claim 1 to 3, it is characterized in that the contextual eNB of the described UE of having comprises: source eNB and/or switching target eNB.
5. as the reconstructed object cell selecting method of each the described RRC connection reconstruction in the claim 1 to 3, it is characterized in that the acquisition methods of the ID of described eNB comprises:
In the system message of Cell Broadcast CB, increase the ID of the eNB of this sub-district institute subordinate;
UE reads the system message of Cell Broadcast CB, with the ID of the eNB that obtains this sub-district institute subordinate.
6. the reconstructed object cell selecting apparatus of a RRC connection reconstruction is characterized in that, comprising:
The ID acquisition module is in order to obtain the ID with the contextual eNB of UE;
Comparison module compares with the ID with the contextual eNB of UE in order to the ID with the eNB of the alternative cell institute subordinate of RRC connection reconstruction;
First processing module in order under the identical situation of comparative result, is elected this alternative cell as the reconstructed object sub-district, and finishes the reconstructed object cell selecting;
Second processing module in order under the different situation of comparative result, is restarted comparison module, till selecting the reconstructed object sub-district or not having alternative cell.
7. the reconstructed object cell selecting method of a RRC connection reconstruction is characterized in that, comprising:
Obtain and have the contextual a plurality of sub-districts of UE;
Select a sub-district in these a plurality of sub-districts as the reconstructed object sub-district.
8. the reconstructed object cell selecting method of RRC connection reconstruction as claimed in claim 7 is characterized in that, UE obtains by the RRC signaling has the contextual a plurality of sub-districts of UE.
9. the reconstructed object cell selecting method of RRC connection reconstruction as claimed in claim 8 is characterized in that, these a plurality of sub-districts are subordinated to source eNB or switching target eNB.
10. as the reconstructed object cell selecting method of each the described RRC connection reconstruction in the claim 7 to 9, it is characterized in that, select in these a plurality of sub-districts the measured sub-district of relative signal matter as the reconstructed object sub-district.
11. the reconstructed object cell selecting apparatus of a RRC connection reconstruction is characterized in that, comprising:
The sub-district acquisition module has the contextual a plurality of sub-districts of UE in order to obtain;
Select module, in order to select a sub-district in these a plurality of sub-districts as the reconstructed object sub-district.
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| WO2019033327A1 (en) * | 2017-08-17 | 2019-02-21 | Qualcomm Incorporated | Techniques and apparatuses for identifying a candidate cell for radio connection reestablishment |
| CN111278072A (en) * | 2017-09-04 | 2020-06-12 | Oppo广东移动通信有限公司 | Method and apparatus for wireless communication |
| US11212851B2 (en) | 2017-09-04 | 2021-12-28 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method and device for wireless communication |
| CN111315039A (en) * | 2018-12-24 | 2020-06-19 | 维沃移动通信有限公司 | Integrity protection failure processing method and terminal |
| CN111315039B (en) * | 2018-12-24 | 2023-02-24 | 维沃移动通信有限公司 | Integrity protection failure processing method and terminal |
| WO2020216330A1 (en) * | 2019-04-26 | 2020-10-29 | 维沃移动通信有限公司 | Handover method and terminal |
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