CN103260204A - Method and device for controlling switching of wireless network controllers - Google Patents
Method and device for controlling switching of wireless network controllers Download PDFInfo
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- CN103260204A CN103260204A CN2012100407131A CN201210040713A CN103260204A CN 103260204 A CN103260204 A CN 103260204A CN 2012100407131 A CN2012100407131 A CN 2012100407131A CN 201210040713 A CN201210040713 A CN 201210040713A CN 103260204 A CN103260204 A CN 103260204A
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Abstract
The invention provides a method and device for controlling switching of wireless network controllers. RRC-RB-RECFG information is constructed on a source RNC side according to integrity protection parameters (RRC, MSN, HFN and the like) saved by the source RNC, and therefore the fact that the HFN on which the source RNC is based to conduct integrity protection on the RRC-RB-RECFG information and the HFN maintained on a UE side are uniform can be ensured, so that a switching failure problem due to issuing of downlink aerial port messages in the switching process can be solved.
Description
Technical field
The present invention relates to mobile communication technology, particularly relate to the method and apparatus that switches between a kind of control radio network controller (RNC).
Background technology
In existing mobile communications system; when opening protection algorithm integrallty; in the mutual UU mouth message of RNC and subscriber equipment (UE), need to carry integrity protection parameter (Integrity check info); to comprise radio resource control information sequence number (RRC Message sequence number, RRC MSN) in this integrity protection parameter.RNC side and UE side are safeguarded according to the Hyper Frame Number of RRC MSN (HFN) of current preservation separately respectively, to carry out the integrity protection of UU mouth message.
The RRC MSN that the UE side is preserved is notified to UE by RNC in descending UU mouth message, because RRC MSN is used for sign RRC message sequence number is whenever issued a descending UU mouth message, corresponding RRC MSN will add 1 accordingly.The concrete grammar of safeguarding according to the HFN of RRC MSN is: RRC MSN is by 0～15 cycle count, and is every through a circulation, and corresponding HFN value adds 1.
Under the normal condition, the RNC side all is consistent with UE side HFN, because the descending RRC MSN that UE uses is that RNC brings UE by UU mouth message.But; opening under the situation of integrity protection; if in carrying out switching between RNC, different system switching handoff procedures such as (switching of different system, the different system of TD-LTE are switched as TD-GSM); (for example issue downlink space interface message; opening measurement report (Measurement Report; MR) under the situation of Ce Lianging; source RNC can send RRC_MEAS_CTRL message to UE; notice UE sets up, discharges corresponding MR and measures), then can there be RNC side integrity protection Parameter H FN and the inconsistent problem of UE side HFN.Below to open under the situation of integrity protection, open and carry out when MR measures that handoff procedure is example between RNC, the existence of the problems referred to above is made a concrete analysis of:
The schematic flow sheet of Fig. 1 for switching between RNC under a kind of situation of the MR of opening measurement.Mainly may further comprise the steps as shown in Figure 1:
Step 101, when the MR measurement is opened, source RNC send to measure control (RRC_MEAS_CTRL) message to UE, notice UE sets up, discharges corresponding MR and measures.
Step 102, source RNC adjudicate when needing to initiate to switch, and send migration request (RANAP_RELOC_REQUIRED) message to core net, wherein carry current integrity protection parameters R RCMSN and HFN information.
Step 103, core net can be given Target RNC the RRC MSN that receives and HFN information by migration request (RANAP_RELOC_REQ) message informing.
Step 104, Target RNC be to after the described RANAP_RELOC_REQ Message Processing, radio bearer reconfiguration message (RRC_RB_RECFG) message is encapsulated among the RRC Container in migration request response (RANAP_RELOC_REQ_ACK) message sends to core net.
Step 105, core net send migration order (RANAP_RELOC_CMD) message to source RNC, and the RRC MSN information of carrying in this message is according to the RRC MSN information backfill in the RELOC_REQUIRED message of source RNC side.
Step 106, source RNC take out the RRC_RB_RECFG message in the described RANAP_RELOC_CMD message, do not process, and directly send it to UE at the UU mouth.
Afterwards, after UE receives RRC_RB_RECFG message, will utilize the HFN of self maintained that this RRC_RB_RECFG message is resolved.
As can be seen, the RRC MSN information of the RRC_RB_RECFG message foundation that source RNC sends is its RRC MSN information of safeguarding when core net sends RANAP_RELOC_REQUIRED message from said process.And if after RANAP_RELOC_REQUIRED message, source RNC continues to send RRC_MEAS_CTRL message at the UU mouth to UE, then can cause UE before receiving RRC_RB_RECFG message, receives UU mouth message again, like this, UE will be according to the RRC MSN value of this UU mouth information updating oneself.Therefore, when after this UE received RRC_RB_RBCFG message, the RRC MSN value in this RRC_RB_RBCFG message will be less than the RRCMSN value of UE current record.At this moment; UE will think that RRC MSN has jumped to next cycle (such as jumping to 1 from 4); therefore the HFN of self maintained can be added 1; and this moment, the RNC RRC_RB_RECFG message that issues in source still was that the original HFN value of usefulness is carried out integrity protection calculating; therefore; the inconsistent problem of HFN that UE side and source RNC side can occur; and then can cause UE can't correctly parse RRC_RB_RECFG message; accordingly; UE can not feed back RRC_RB_RECFG_CMP message and give network side; thereby cause handoff failure between RNC, the UE call drop.
This shows, in carrying out handoff procedures such as switching between RNC, the switching of different system, if there are other trigger flow to issue downlink space interface message, just may cause handoff failure between RNC when opening integrity protection.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method and apparatus that switches between radio network controller of controlling, and issues the handoff failure problem that downlink space interface message causes because of other flow processs in the time of effectively avoiding opening integrity protection in handoff procedure.
In order to achieve the above object, the technical scheme of the present invention's proposition is:
A kind of method of switching between radio network controller of controlling, this method may further comprise the steps:
MR measures open period; in the process that switching or different system are switched between radio network controller (RNC); when source RNC receives the migration order RANAP_RELOC_CMD message of core net CN transmission; the integrity protection parameter of preserving according to described source RNC self makes up radio bearer reconfiguration message RRC_RB_RECFG message, and sends to UE.
Device for switching between a kind of control radio network controller, described device comprises:
The switching controls module; be used for measuring open period at MR; in the process that switching or different system are switched between radio network controller (RNC); when source RNC receives the migration order RANAP_RELOC_CMD message of core net CN transmission; the integrity protection parameter of preserving according to described source RNC self makes up radio bearer reconfiguration message RRC_RB_RECFG message, and sends to UE.
In sum; the method and apparatus that switches between the control radio network controller that the present invention proposes; by in source RNC side; the integrity protection parameter of preserving according to described source RNC self makes up radio bearer and reshuffles (RRC_RB_RECFG) message; with guarantee the RRC_RB_RECFG message of source RNC carry out integrity protection based on HFN and the HFN that safeguards of UE side be consistent, thereby can avoid because issuing the handoff failure problem that downlink space interface message causes between transfer period.
Description of drawings
The schematic flow sheet of Fig. 1 for switching between RNC under a kind of situation of the MR of opening measurement;
Fig. 2 is the apparatus structure schematic diagram of the embodiment of the invention one.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
Core concept of the present invention is; when between RNC, switching; source RNC handles for the RANAP_RELOC_CMD message that CN sends; resolve Target RNC to Source RNC Transparent Container message wherein; wherein integrity protection parameter is checked, find and the integrity protection parameter of current source RNC side when inconsistent renewal integrity protection parameter value wherein; be reassembled into RB_RECFG message then, issue UE again.So just can guarantee the RRC_RB_RECFG message of RNC carry out integrity protection based on HFN and the HFN that safeguards of UE side be consistent, thereby avoid because issuing the handoff failure problem that downlink space interface message causes between transfer period.
The embodiment of the invention one mainly may further comprise the steps:
MR measures open period; in the process that switching or different system are switched between RNC; when source RNC receives migration order (RANAP_RELOC_CMD) message of core net (CN) transmission; reshuffle (RRC_RB_RECFG) message according to the integrity protection parameter structure radio bearer that described source RNC self preserves, and send to UE.
Here; when making up RRC_RB_RECFG message; carry out based on the integrity protection parameter that source RNC self preserves; like this; can guarantee the RRC_RB_RECFG message that source RNC is issued carry out integrity protection based on HFN safeguard the HFN unanimity with UE, thereby can avoid because issuing the handoff failure problem that downlink space interface message causes between transfer period.
Described different system is switched as the switching of the different system of TD-GSM, the switching of the different system of TD-LTE etc., but is not limited thereto, as long as the switching between different system.
Here, specifically how to make up radio bearer and reshuffle (RRC_RB_RECFG) message, by those skilled in the art are grasped, do not repeat them here.
Preferably; in order to have compatible preferably with existing protocol; improve the accuracy that the present invention carries out switching controls; when making up described RRC_RB_RECFG message; the described integrity protection parameter with self current preservation is identical can to check integrity protection parameter that the Target RNC in the RANAP_RELOC_CMD message carries to the transparent vessel message of source RNC earlier; when inequality; the described integrity protection parameter that recycling self is preserved makes up described RRC_RB_RECFG message, and concrete grammar is as follows:
Described source RNC is to described RANAP_RELOC_CMD message parse and obtain Target RNC to the transparent vessel Target RNC to Source RNC Transparent Container message of source RNC; the RRC MSN with self current preservation is identical to check the radio resource control information sequence number RRC MSN of described Target RNC in the transparent vessel message of source RNC; if it is different; then utilize the described integrity protection parameter of self preserving to make up described RRC_RB_RECFG message; if identical, then according to the described RRC_RB_RECFG message of described RANAP_RELOC_CMD message construction.
Preferably, consistent for the integrity protection parameter of the integrity protection parameter that makes up described RRC_RB_RECFG message and the preservation of UE side in order further to guarantee source RNC, can control issuing of downlink space interface message, specific as follows:
When described source RNC has sent migration request (RANAP_RELOC_REQUIRED) message to core net after, described source RNC suspends to the user equipment (UE) transmission idle message that carries out described switching, recovers to send idle message to described UE after described source RNC sends described RRC_RB_RECFG message to described UE.
Here; by restriction source RNC after sending RANAP_RELOC_REQUIRED message to send RRC_RB_RECFG message to UE during; stop to send idle message to UE; thereby can guarantee no longer the RRC MSN information of self maintained to be safeguarded before the RRC_RB_RECFG message of UE after receiving encryption; and then can guarantee the RRC_RB_RECFG message of RNC carry out integrity protection based on HFN and the HFN that safeguards of UE side be consistent; UE can correctly resolve RRC_RB_RECFG message like this, has effectively avoided because issuing the handoff failure problem that downlink space interface message causes between transfer period.
Fig. 2 is the structure drawing of device corresponding with said method, and as shown in the figure, this device mainly comprises:
The switching controls module; be used for measuring open period at MR; in the process that switching or different system are switched between RNC; when source RNC receives migration order (RANAP_RELOC_CMD) message of CN transmission; reshuffle RRC_RB_RECFG message according to the integrity protection parameter structure radio bearer that described source RNC self preserves, and send to UE.
Preferably; described switching controls module is further used for described source RNC to described RANAP_RELOC_CMD message parse and obtains Target RNC to the transparent vessel Target RNC to Source RNC Transparent Container message of source RNC; the RRC MSN with self current preservation is identical to check the radio resource control information sequence number RRC MSN of described Target RNC in the transparent vessel message of source RNC; if it is different; then utilize the described integrity protection parameter of self preserving to make up described RRC_RB_RECFG message; if identical, then according to the described RRC_RB_RECFG message of described RANAP_RELOC_CMD message construction.
Preferably, described switching controls module, be further used for when described source RNC has sent migration request (RANAP_RELOC_REQUIRED) message to core net after, described source RNC suspends to the UE transmission idle message that carries out described switching, recovers to send idle message to described UE after described source RNC sends described RRC_RB_RECFG message to described UE.
In sum, more than be preferred embodiment of the present invention only, be not for limiting protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. control the method for switching between radio network controller for one kind, it is characterized in that, this method may further comprise the steps:
MR measures open period; in the process that switching or different system are switched between radio network controller (RNC); when source RNC receives the migration order RANAP_RELOC_CMD message of core net CN transmission; the integrity protection parameter of preserving according to described source RNC self makes up radio bearer reconfiguration message RRC_RB_RECFG message, and sends to UE.
2. method according to claim 1 is characterized in that, described integrity protection parameter of preserving according to described source RNC self makes up RRC_RB_RECFG message and comprises:
Described source RNC is to described RANAP_RELOC_CMD message parse and obtain Target RNC to the transparent vessel Target RNC to Source RNC Transparent Container message of source RNC; the RRC MSN with self current preservation is identical to check the radio resource control information sequence number RRC MSN of described Target RNC in the transparent vessel message of source RNC; if it is different; then utilize the described integrity protection parameter of self preserving to make up described RRC_RB_RECFG message; if identical, then according to the described RRC_RB_RECFG message of described RANAP_RELOC_CMD message construction.
3. method according to claim 1 is characterized in that, this method further comprises,
When described source RNC has sent migration request RANAP_RELOC_REQUIRED message to core net after, described source RNC suspends to the user equipment (UE) transmission idle message that carries out described switching, recovers to send idle message to described UE after described source RNC sends described RRC_RB_RECFG message to described UE.
4. control device for switching between radio network controller for one kind, it is characterized in that described device comprises:
The switching controls module; be used for measuring open period at MR; in the process that switching or different system are switched between radio network controller (RNC); when source RNC receives the migration order RANAP_RELOC_CMD message of core net CN transmission; the integrity protection parameter of preserving according to described source RNC self makes up radio bearer reconfiguration message RRC_RB_RECFG message, and sends to UE.
5. device according to claim 4; it is characterized in that; described switching controls module is further used for described source RNC to described RANAP_RELOC_CMD message parse and obtains Target RNC to the transparent vessel Target RNC to Source RNC Transparent Container message of source RNC; the RRC MSN with self current preservation is identical to check the radio resource control information sequence number RRC MSN of described Target RNC in the transparent vessel message of source RNC; if it is different; then utilize the described integrity protection parameter of self preserving to make up described RRC_RB_RECFG message; if identical, then according to the described RRC_RB_RECFG message of described RANAP_RELOC_CMD message construction.
6. device according to claim 4, it is characterized in that, described switching controls module, be further used for when described source RNC has sent migration request RANAP_RELOC_REQUIRED message to core net after, described source RNC suspends to the user equipment (UE) transmission idle message that carries out described switching, recovers to send idle message to described UE after described source RNC sends described RRC_RB_RECFG message to described UE.
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| CN2012100407131A CN103260204A (en) | 2012-02-21 | 2012-02-21 | Method and device for controlling switching of wireless network controllers |
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| CN2012100407131A CN103260204A (en) | 2012-02-21 | 2012-02-21 | Method and device for controlling switching of wireless network controllers |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101111062A (en) * | 2006-07-21 | 2008-01-23 | 普天信息技术研究院 | Method for relocating service wireless network subsystem |
| WO2009070576A2 (en) * | 2007-11-27 | 2009-06-04 | Qualcomm Incorporated | Method and apparatus for handling out-of-order packets during handover in a wireless communication system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101111062A (en) * | 2006-07-21 | 2008-01-23 | 普天信息技术研究院 | Method for relocating service wireless network subsystem |
| WO2009070576A2 (en) * | 2007-11-27 | 2009-06-04 | Qualcomm Incorporated | Method and apparatus for handling out-of-order packets during handover in a wireless communication system |
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Application publication date: 20130821 |