CN101026857A - Method for preparing resource in advance for hard switching process - Google Patents
Method for preparing resource in advance for hard switching process Download PDFInfo
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- CN101026857A CN101026857A CNA2006100078355A CN200610007835A CN101026857A CN 101026857 A CN101026857 A CN 101026857A CN A2006100078355 A CNA2006100078355 A CN A2006100078355A CN 200610007835 A CN200610007835 A CN 200610007835A CN 101026857 A CN101026857 A CN 101026857A
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Abstract
The method includes steps: controller of source base station (SBS) informs the relevant context information of terminal needed to switch to candidate target base station (TBS) to be switched to; based on the context information, TBS carries out preparative judgment in advance, and informs successful or unsuccessful message of judgment to SBS; if receiving successful message, controller of SBS marks the candidate TBS to be switched to as 'usable'; otherwise, marking the candidate TBS to be switched to as 'unusable'; controller of TBS monitors self condition momentarily; once condition changes, controller of TBS carries out preparative judgment in advance again; if it is inconsistent between current judged result and judged result for previous time, then controller of TBS informs current judged result to controller of SBS; otherwise, not reporting any message to controller of SBS, and continuing monitoring change of self condition.
Description
Technical field
The present invention relates to the direct-cut operation in the wireless communication system, relate in particular to a kind of method of in direct-cut operation, preparing resource in advance.
Background technology
In the wireless communication system, direct-cut operation can be divided into 4 stages: prepare the resource stage in advance, in the handover decisions stage, handover execution stage is switched and to be finished and discharge the old resource stage.
Prepare the resource stage in advance, be to prepare for follow-up fast handover procedures, the source base station controller will need the related context information of the terminal switched, be transferred on each possible switching candidate target base station controller, the resource that each switching candidate target base station controller switches according to this information is prepared.
In the existing conventional art, prepare the resource stage in advance and be positioned at handover decisions after the stage, after handover decisions, just begin to prepare in advance resource.Switching time is longer so, and do not carry out owing to after handover decisions, have to switch at once, but after the preparation resource has been got well earlier, just do to switch and carry out, middle existence is switched lag time for one section and is used to prepare resource, may occur causing call drop owing to can't in time switching fast.
Summary of the invention
The technical problem to be solved in the present invention provides the method for preparing resource in a kind of direct-cut operation in advance, can be with succinctly, mode makes the safe and reliable and best performance of direct-cut operation efficiently.
In order to solve the problems of the technologies described above, the invention provides the method for preparing resource in a kind of direct-cut operation in advance, may further comprise the steps:
(a) related context information of the terminal that need switch of source base station controller notice switching candidate target base station, this target base station controller is prepared judgement in advance according to this contextual information, and will adjudicate success or failed message is notified this source base station controller;
(b) this source base station controller receive if success message then is labeled as " available " with this switching candidate target base station; Otherwise, this switching candidate target base station is labeled as " unavailable ";
(c) described target base station controller is monitored the variation of s own situation at any time, in case s own situation changes, this target base station controller is prepared judgement in advance once more according to this related context information, obtains judged result;
(d) if current judged result and last court verdict are inconsistent, described target base station controller returns current judged result notification source base station controller to step (b); If current judged result is consistent with last court verdict, then do not report any message to give the source base station controller, return step (c).
Further, said method also can have following characteristics: till the related context information of described flow process terminal in the source base station controller switches decision-making decision switching or this switching candidate target base station was released, described target base station controller was no longer monitored.
Further, said method also can have following characteristics: in the described step (b), when this target BS was labeled as " available ", in follow-up handover decisions, this target BS was as effectively candidate target consideration; When this target BS was labeled as " unavailable ", in follow-up handover decisions, this target BS was rejected it from candidate target, do not consider.
Further, said method also can have following characteristics: in the described step (a), the related context information of described terminal comprises the chain of command contextual information of this terminal, comprises the interlayer mapping relations parameter of mapping relations parameter, radio resource control layer and medium access control preparative layer between chain of command configuration parameter, RAB and the radio bearer of radio resource control layer; User's face contextual information of this terminal comprises user's face configuration parameter of medium access control preparative layer, user's face configuration parameter of packet data convergence protocol; And the disposal ability information of this terminal, comprise the wireless access capability and the wireless disposal ability of this terminal.
Further, said method also can have following characteristics: in the described step (a), the described decision rule subitem of preparing judgement in advance comprises following project or its combination in any: operation maintenance center is provided with, load is checked, capacity is checked and admission judgment, all the decision rule subitem passes through, and then thinks and prepares success in advance; Any one decision rule subitem does not pass through, then think prepare in advance unsuccessful.
Further, said method also can have following characteristics: in the described step (c), the variation of the s own situation of described target BS comprises: whether operation maintenance center is provided with and changes, whether current traffic overload state changes, whether current system capacity changes, and whether the uplink interference of current system and descending power are adjusted.
Further, said method also can have following characteristics: in the described step (a), after described admission judgment is meant that the RAB of this terminal that preparation is switched is access in, calculate up total interference, with descending gross power, if up total interference is lower than predetermined interference threshold, and descending gross power is lower than the predetermined power thresholding, thinks that then this decision rule subitem passes through; Otherwise then think and do not pass through.
Further, said method also can have following characteristics: when the decision-making that switches of source base station controller, during the decision switching target, if switching target is this switching candidate target base station controller, then the source base station controller will send the switching notice signaling message to this switching candidate target base station controller, and described target base station controller is no longer monitored; If switching target is other base station controllers of non-this switching candidate target base station controller and non-source base station controller, then the source base station controller will send remove terminal the related context information signaling message to this switching candidate target base station controller, described target base station controller is no longer monitored; If switching target is exactly a source base station controller itself, then keep existing processing, any variation does not take place.
Further, said method also can have following characteristics: any unusual if described flow process takes place, then the related context information signaling message of source base station controller transmission removing terminal is to this switching candidate target base station controller, and described target base station controller is no longer monitored.
In sum, the invention provides the method for preparing resource in a kind of direct-cut operation in advance, by the interacting message between source base station controller and the switching candidate target base station, and the switching candidate target base station according to self admit situation such as load initiatively reporting message to the source base station controller, come optimization process, shorten switching time, the non real-time process errors of avoiding preparing in advance resource stage and handover decisions stage life period difference and causing, i.e. switch cost or switch less than optimum subdistrict.
Description of drawings
Fig. 1 is the schematic flow sheet of application example 1 of the present invention;
Fig. 2 is the schematic flow sheet of application example 2 of the present invention;
Fig. 3 be in the embodiment of the invention switching candidate target base station controller prepare the judgement schematic flow sheet in advance.
Embodiment
Be described in further detail below in conjunction with the enforcement of accompanying drawing technical scheme of the present invention:
The present invention is by the interacting message between source base station controller and the switching candidate target base station, and the switching candidate target base station admits situation such as load initiatively reporting message is to the source base station controller according to self, and this technical scheme may further comprise the steps:
Step 1, the source base station controller sends " transmission of terminal contextual information " message to the switching candidate target base station, carries the related context information of this terminal that needs switching in the message;
The related context information of this terminal specifically comprises: the chain of command contextual information of this terminal comprises the interlayer mapping relations parameter of mapping relations parameter, radio resource control layer and medium access control preparative layer between chain of command configuration parameter, RAB and the radio bearer of radio resource control layer; User's face contextual information of this terminal comprises user's face configuration parameter of medium access control preparative layer, user's face configuration parameter of packet data convergence protocol; The disposal ability information of this terminal comprises the wireless access capability and the wireless disposal ability of this terminal.
Step 2, the switching candidate target base station controller is preserved the related context information of this terminal;
Step 3, the switching candidate target base station controller is prepared judgement in advance according to the related context information of this terminal of preserving, and court verdict has two kinds: " preparing success in advance ", and " preparing in advance unsuccessful ";
This is prepared judgement in advance and comprises following decision rule subitem:
OMC (operation maintenance center) is provided with: if OMC is not provided with hard obstruction, think that then this decision rule subitem passes through; Otherwise then think and do not pass through;
Load is checked: whether this candidate target base station controller is in the traffic overload state at present, if be not in the traffic overload state, thinks that then this decision rule subitem passes through; Otherwise then think and do not pass through;
Capacity is checked: whether this candidate target base station controller arrives the peak capacity of predetermined process at present, if no show thinks that then this decision rule subitem passes through; Otherwise then think and do not pass through;
Admission judgment: after the RAB of this terminal that preparation is switched is access in, calculate up total interference and descending gross power.If up total interference is lower than predetermined interference threshold, and descending gross power is lower than the predetermined power thresholding, thinks that then this decision rule subitem passes through; Otherwise then think and do not pass through.Specifically,
Uplink interference is judged as I
Total_old+ Δ I＞I
Threshold, I
Total_oldBe new RAB admit before the received total interference power of base station controller, relevant with background and receiver noise, this base station controller inter-user interference with adjacent base station controller inter-user interference, by the base station controller measurement and get.I
ThresholdFor admitting the threshold value of control, preestablish by wireless network planning.Δ I admits the total predicted value of disturbing of back system, Δ I=I to the RAB of this terminal of switching
Total_old* the load estimation factor of the uplink load factor+this RAB, the uplink load factor and the load estimation factor are consensus standardization, directly get final product with reference to using.
Descending power is judged as P
Total_old+ Δ P＞=P
Threshold, P
Total_oldBe the total transmitting power of measuring in real time of base station controller, Δ P admits the increment of the estimated total transmitting power of base station controller in back, P for the RAB of this terminal of switching
ThresholdThreshold value for the total transmitting power of base station controller is preestablished by wireless network planning.
A, B, C all are path loss matrixes of consensus standardization, and j is the sub-class-mark of the RAB of consensus standardization, directly get final product with reference to using.
More than all the decision rule subitems pass through, then think " preparing success in advance "; Any one decision rule subitem does not pass through, and then thinks " preparing in advance unsuccessful ".
Step 4, if the court verdict of switching candidate target base station controller is " preparing success in advance ", the switching candidate target base station replies to the source base station controller with " acceptance of terminal contextual information " message so; If the court verdict of switching candidate target base station controller is " preparing in advance unsuccessful ", the switching candidate target base station replies to the source base station controller with " terminal contextual information refusal " message so;
The message that step 5, source base station controller receive is if " acceptances of terminal contextual information ", and the source base station controller then is labeled as " available " with this switching candidate target base station so, and in follow-up handover decisions as effectively candidate target consideration; The message that the source base station controller receives is if " terminal contextual information refusal ", and the source base station controller then is labeled as " unavailable " with this switching candidate target base station so, and in follow-up handover decisions it is rejected from candidate target, does not consider;
Step 6, the switching candidate target base station controller is monitored the variation of s own situation at any time, in case s own situation changes, the switching candidate target base station controller is according to the related context information of this terminal of preserving, prepare judgement once more in advance, obtain judged result;
The variation of the s own situation of above-mentioned target BS comprises: whether OMC is provided with and changes, and whether current traffic overload state changes, and whether current system capacity changes, and whether the uplink interference of current system and descending power are adjusted.
Step 7, if current judged result and last court verdict are inconsistent, from " preparing success in advance " to " preparing in advance unsuccessful " or the upset from " preparing in advance unsuccessful " to " preparing success in advance " just take place, then give the source base station controller with information reporting, return step 5 current judged result; If current judged result is consistent with last court verdict, then do not report any message to give the source base station controller, return step 6.
Till the related context information of said process terminal in the source base station controller switches decision-making decision switching or this switching candidate target base station is released.If generation is any unusual in the above process, then the related context information signaling message of source base station controller transmission removing terminal stops above process to this switching candidate target base station controller.
When the decision-making that switches of source base station controller, during the decision handover-target base station, comprise following several situation:
If 1 handover-target base station is this switching candidate target base station controller, the source base station controller will send the switching notice signaling message to this switching candidate target base station controller so, stop above process;
If 2 handover-target base station are other base station controllers of non-this switching candidate target base station controller and non-source base station controller, so the source base station controller will send remove terminal the related context information signaling message to this switching candidate target base station controller, stop above process;
If 3 switching targets are exactly source base station controller itself, keep existing processing so, any variation does not take place.
Below be two application examples of the present invention:
Example 1 set scene: base station controller 1 is the source base station controller, and base station controller 2 is the switching candidate target controller.Fig. 1 shows the whole flow process of example 1, may further comprise the steps:
Step 220, the source base station controller carries out handover decisions, and decision is switched.Above process stops.
Example 2 set scenes: base station controller 1 is the source base station controller, and base station controller 2 is the switching candidate target controller.Fig. 2 shows the whole flow process of example 2, may further comprise the steps:
Step 310, the source base station controller sends " transmission of terminal contextual information " message to the switching candidate target base station, carries the related context information of this terminal that needs switching in the message;
Step 320, the related context information of this terminal is preserved in the switching candidate target base station;
Step 330, the switching candidate target base station is prepared judgement in advance according to the related context information of this terminal of preserving, and supposes that this court verdict is " preparing success in advance ";
Step 340 is because the court verdict of switching candidate target base station controller is " preparing success in advance ", so the switching candidate target base station replies to the source base station controller with " acceptance of terminal contextual information " message;
Step 350, source base station controller are labeled as " available " with this switching candidate target base station after receiving " acceptance of terminal contextual information " message, put into effective switching candidate target, and consider as effective candidate target in follow-up handover decisions;
Step 360, the switching candidate target base station controller is monitored the variation of s own situation at any time, comprises whether the OMC setting changes, and whether current traffic overload state changes, and whether current system capacity changes, and whether the uplink interference of current system and descending power are adjusted.In case s own situation changes, then trigger and prepare judgement in advance, obtain judged result, suppose that this court verdict is " preparing success in advance ";
Step 370, because the court verdict of switching candidate target base station controller be " preparing success in advance ", and last court verdict also is " preparing success in advance ", so maintain the statusquo, reporting message is to the source base station controller;
Step 380, the switching candidate target base station controller is monitored the variation of s own situation at any time, comprises whether the OMC setting changes, and whether current traffic overload state changes, and whether current system capacity changes, and whether the uplink interference of current system and descending power are adjusted.In case s own situation changes, then trigger and prepare judgement in advance, obtain judged result, suppose that this court verdict is " preparing in advance unsuccessful ";
Step 390, because the court verdict of switching candidate target base station controller be " preparing in advance unsuccessful ", and last court verdict is " preparing success in advance ", upset occurs, so the decision reporting message is to the source base station controller;
Step 400, switching candidate target base station controller report " terminal contextual information refusal " message to give the source base station controller;
Step 410, source base station controller receive " terminal contextual information refusal " message, then this switching candidate target base station are labeled as " unavailable ", and in follow-up handover decisions it are rejected from candidate target, do not consider;
Step 420, the source base station controller carries out handover decisions, and decision is switched.Above process stops.
Fig. 3 shows the detailed process of preparing judgement in the example in advance, and concrete judgment condition and method are described as follows:
Step 610 is carried out OMC judgement is set.If OMC is provided with hard obstruction, then change step 670 over to; If be not provided with, then change step 620 over to;
Step 630 is carried out the capacity inspection, judges whether this candidate target base station controller arrives the peak capacity of predetermined process at present, if arrive, then changes step 670 over to; If do not reach, then change step 640 over to;
Step 640 is calculated up total interference (I
Total_old+ Δ I) and descending gross power (P
Total_old+ Δ P);
Step 650 is carried out admission judgment, compares by up total interference of calculating and descending total power value and predefined thresholding, if I
Total_old+ Δ I＞I
Threshold, perhaps P
Total_old+ Δ P＞=P
Threshold, then think and can't admit, change step 670 over to; Otherwise, then can admit, change step 660 over to;
Wherein, I
ThresholdFor admitting the threshold value of control, preestablish by wireless network planning; P
ThresholdThreshold value for the total transmitting power of base station controller is preestablished by wireless network planning.
Step 660 is judged to be " preparing success in advance ", finishes.
Step 670 is judged to be " preparing in advance unsuccessful ", finishes.
Claims (9)
1, prepare the method for resource in a kind of direct-cut operation in advance, may further comprise the steps:
(a) related context information of the terminal that need switch of source base station controller notice switching candidate target base station, this target base station controller is prepared judgement in advance according to this contextual information, and will adjudicate success or failed message is notified this source base station controller;
(b) this source base station controller receive if success message then is labeled as " available " with this switching candidate target base station; Otherwise, this switching candidate target base station is labeled as " unavailable ";
(c) described target base station controller is monitored the variation of s own situation at any time, in case s own situation changes, this target base station controller is prepared judgement in advance once more according to this related context information, obtains judged result;
(d) if current judged result and last court verdict are inconsistent, described target base station controller returns current judged result notification source base station controller to step (b); If current judged result is consistent with last court verdict, then do not report any message to give the source base station controller, return step (c).
2, the method for claim 1, it is characterized in that, till the related context information of described flow process terminal in the source base station controller switches decision-making decision switching or this switching candidate target base station was released, described target base station controller was no longer monitored.
3, the method for claim 1 is characterized in that, in the described step (b), when this target BS was labeled as " available ", in follow-up handover decisions, this target BS was as effectively candidate target consideration; When this target BS was labeled as " unavailable ", in follow-up handover decisions, this target BS was rejected it from candidate target, do not consider.
4, the method for claim 1, it is characterized in that, in the described step (a), the related context information of described terminal comprises the chain of command contextual information of this terminal, comprises the interlayer mapping relations parameter of mapping relations parameter, radio resource control layer and medium access control preparative layer between chain of command configuration parameter, RAB and the radio bearer of radio resource control layer; User's face contextual information of this terminal comprises user's face configuration parameter of medium access control preparative layer, user's face configuration parameter of packet data convergence protocol; And the disposal ability information of this terminal, comprise the wireless access capability and the wireless disposal ability of this terminal.
5, the method for claim 1, it is characterized in that, in the described step (a), the described decision rule subitem of preparing judgement in advance comprises following project or its combination in any: operation maintenance center is provided with, load is checked, capacity checks and admission judgment that all the decision rule subitem passes through, and then thinks and prepares success in advance; Any one decision rule subitem does not pass through, then think prepare in advance unsuccessful.
6, as claim 1 or 5 described methods, it is characterized in that, in the described step (c), the variation of the s own situation of described target BS comprises: whether operation maintenance center is provided with and changes, whether current traffic overload state changes, whether current system capacity changes, and whether the uplink interference of current system and descending power are adjusted.
7, method as claimed in claim 5, it is characterized in that, in the described step (a), after described admission judgment is meant that the RAB of this terminal that preparation is switched is access in, calculate up total interference and descending gross power, if up total interference is lower than predetermined interference threshold, and descending gross power is lower than the predetermined power thresholding, thinks that then this decision rule subitem passes through; Otherwise then think and do not pass through.
8, method as claimed in claim 2, it is characterized in that, when the decision-making that switches of source base station controller, during the decision switching target, if switching target is this switching candidate target base station controller, then the source base station controller will send the switching notice signaling message to this switching candidate target base station controller, and described target base station controller is no longer monitored; If switching target is other base station controllers of non-this switching candidate target base station controller and non-source base station controller, then the source base station controller will send remove terminal the related context information signaling message to this switching candidate target base station controller, described target base station controller is no longer monitored; If switching target is exactly a source base station controller itself, then keep existing processing, any variation does not take place.
9, the method for claim 1, it is characterized in that, if described flow process takes place any unusual, then the related context information signaling message of source base station controller transmission removing terminal is to this switching candidate target base station controller, and described target base station controller is no longer monitored.
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| US11665601B2 (en) | 2018-09-27 | 2023-05-30 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method for handover report and terminal device |
| CN110996355A (en) * | 2019-12-03 | 2020-04-10 | 西安电子科技大学 | High-speed rail LTE switching method based on double-antenna linkage |
| CN110996355B (en) * | 2019-12-03 | 2021-06-08 | 西安电子科技大学 | High-speed rail LTE switching method based on double-antenna linkage |
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