CN101193412B - Method for shortening reading time of system frame number in item-reestablishment hard switch - Google Patents
Method for shortening reading time of system frame number in item-reestablishment hard switch Download PDFInfo
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- CN101193412B CN101193412B CN200610114699XA CN200610114699A CN101193412B CN 101193412 B CN101193412 B CN 101193412B CN 200610114699X A CN200610114699X A CN 200610114699XA CN 200610114699 A CN200610114699 A CN 200610114699A CN 101193412 B CN101193412 B CN 101193412B
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- reconfiguration message
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Abstract
The invention proposes a method for shortening the time for reading a system frame number in time re-initialized, which comprises the following steps: Step 1, a radio network controller initiates a time re-initialized and sends a reconfiguration message to a mobile terminal and whether the system frame number timing in a target cell is in accordance with the system frame number timing in a sourcecell is indicated in the reconfiguration message; Step 2, the mobile terminal receives the reconfiguration message and decides whether the system frame number timing in the target cell is same as thesystem frame number timing in the source cell according to the reconfiguration message; if the system frame number timing in the target cell is the same with the system frame number timing in the source cell, then the mobile terminal calculates a connection frame number using the system frame number of the source cell; otherwise, the mobile terminal rereads the system frame number of the target cell; Step 3, the mobile terminal returns a reconfiguration accomplishment response to the radio network controller after accomplishing the reconfiguration. The invention greatly shortens the delay forcarrying out the time re-initialized between same SFN cells and enhances the handoff speed.
Description
Technical field
The present invention relates to field of wireless communication, particularly rebuild the method that shortens SFN (System Frame Number, System Frame Number) time for reading in (time re-initialised) type direct-cut operation relevant for a kind of time.
Background technology
In present TD-SCDMA system, for the direct-cut operation of time reconstruction (time re-initialised) type, the SFN that needs terminal to read Target cell calculates new CFN (Connection Frame Number, Connection Frame Number).But synchronous and SFN transmit mechanism according to TD-SCDMA, need at first read Target cell DwPTS (Downlink Pilot Time Slot, descending pilot frequency time slot) phase-modulated information on, find P-CCPCH (Primary Common Control Physical Channel then, basic Common Control Channel) position, just can read BCH (Broadcast Channel, broadcast channel) goes up the SFN information that sends, this process might be very long, thereby have influence on the performance of switching.
UE can also pass through SFN-SFN OTD type 1, and (just UE measurement target sub-district and cell-of-origin SFN's is poor for SFN-SFN Observed Time Difference, SFN-SFN observed time difference.TYPE1 is to be unit (that is to say what SFN are the result represented to differ) with FRAME, and TYPE2 is unit (what CHIP are the result represented to differ) with chip.) the SFN information that measures Target cell, but in following three kinds of situations, UE (" UE " refers to " portable terminal " among the present invention for User Equipment, subscriber equipment) can't carry out this measurement:
1. network terminal does not require UE that the Target cell that switches is carried out the measurement of SFN-SFN OTD type 1;
2. network terminal requires UE that switching target small area is carried out the measurement of SFN-SFN OTD type 1, but UE is operated on the TS0 of cell-of-origin;
3. network terminal requires UE that switching target small area is carried out the measurement of SFN-SFN OTD type 1, but cell-of-origin of switching and Target cell are the alien frequencies relations, and UE is operated on the TS6 of cell-of-origin, and UE is not free to carry out frequency locking, removes to read the SFN of Target cell.
The situation that the current network side judgement employing time is rebuild (time re-initialised) type direct-cut operation mainly is divided into two kinds:
A. network side is not known the SFN of Target cell when switching;
B. network side need change the CFN (based on the consideration of level and smooth NodeB disposal ability) of UE when switching.DOFF (Default DPCH Offset Value) value can play the effect of level and smooth NodeB workload, is striding the DOFF value that need change UE when NodeB switches, and regenerates the CFN of UE.
The processing such as interweave of each UE channel is to carry out when the TTI of this UE finishes in NodeB, and the use of DOFF value can so that the TTI concluding time of UE stagger as much as possible to realize the work of treatment amount of level and smooth NodeB.When switch the minizone of striding NodeB, the DOFF value of using before UE switches is distributed at NodeB under its cell-of-origin, may be also improper and under Target cell, should be worth the NodeB, RNC can redistribute the DOFF value, when newly assigned DOFF value makes that the CFN of UE changes, the direct-cut operation of RNC decision initiation time reconstruction type (time re-initialised).
In addition, according to present network condition, the SFN of most of sub-district can be consistent, and has only the SFN of seldom a part of sub-district may be inconsistent.
Summary of the invention
For addressing the above problem, the object of the present invention is to provide a kind of time to rebuild the method that shortens the System Frame Number time for reading in the direct-cut operation, make when Target cell is identical with cell-of-origin SFN, save the time that UE reads Target cell SFN, thereby accelerate the speed of switching.
For achieving the above object, the present invention proposes the method that shortens the System Frame Number time for reading in a kind of time reconstruction direct-cut operation, wherein, comprising:
Step 1, the radio network controller initiation time is rebuild direct-cut operation, and sends reconfiguration message to portable terminal, and whether the make eye bright System Frame Number of mark sub-district of described reconfiguration message middle finger is regularly regularly consistent with the System Frame Number of cell-of-origin;
Step 2, described portable terminal is received described reconfiguration message, whether the System Frame Number of judging described Target cell according to described reconfiguration message is regularly regularly identical with the System Frame Number of described cell-of-origin, if it is identical, then described portable terminal uses the System Frame Number of described cell-of-origin to calculate Connection Frame Number, if inequality, then described portable terminal reads the System Frame Number of described Target cell again;
Step 3 after described portable terminal is finished and reshuffled, is returned to reshuffle to described radio network controller and is finished response.
The above-mentioned time is rebuild the method that shortens the System Frame Number time for reading in the direct-cut operation, and wherein, described reconfiguration message further comprises: physical channel reconfiguration message, radio bearer reconfiguration message or transmission channel reconfiguration message.
The above-mentioned time is rebuild the method that shortens the System Frame Number time for reading in the direct-cut operation, and wherein, described step 3 further comprises:
After described portable terminal is finished physical channel and reshuffled, return physical channel to described radio network controller and reshuffle and finish message; Perhaps
After described portable terminal is finished radio bearer and reshuffled, return radio bearer to described radio network controller and reshuffle and finish message; Perhaps
After described portable terminal is finished transmission channel and reshuffled, return transmission channel to described radio network controller and reshuffle and finish message.
The above-mentioned time is rebuild the method that shortens the System Frame Number time for reading in the direct-cut operation, and wherein, described reconfiguration message also comprises the indication information of initiation time reconstruction direct-cut operation.
The above-mentioned time is rebuild the method that shortens the System Frame Number time for reading in the direct-cut operation, wherein, in the described step 2 at the System Frame Number of judging described Target cell regularly with before whether the System Frame Number of described cell-of-origin identical, also comprise: described portable terminal is judged the indication information that whether comprises described initiation time reconstruction direct-cut operation in the described reconfiguration message, if comprise described information, think that then the described network controller time of initiation rebuilds direct-cut operation, if do not comprise described information, then stop the time reconstruction direct-cut operation that described network controller is initiated.
The above-mentioned time is rebuild the method that shortens the System Frame Number time for reading in the direct-cut operation, wherein, described step 1 further comprises: when described Target cell System Frame Number timing and described cell-of-origin System Frame Number are regularly inconsistent, in described reconfiguration message, carry appointed information unit IE, when described Target cell System Frame Number is regularly regularly consistent with described cell-of-origin System Frame Number, in described reconfiguration message, do not carry described appointed information unit IE.
The above-mentioned time is rebuild the method that shortens the System Frame Number time for reading in the direct-cut operation, and wherein, described step 2 further comprises:
Described portable terminal judges whether comprise described IE in the described reconfiguration message, if comprise described IE, then described Target cell System Frame Number is regularly regularly inconsistent with described cell-of-origin System Frame Number, described portable terminal reads the System Frame Number of described Target cell again, System Frame Number according to described Target cell calculates described Connection Frame Number, if do not comprise described IE, then the System Frame Number of described Target cell is regularly regularly consistent with described cell-of-origin System Frame Number, and described portable terminal directly utilizes the System Frame Number of described cell-of-origin to calculate described Connection Frame Number.
The invention provides a kind of time rebuilds the method that shortens the SFN time for reading in the direct-cut operation of (Time re-initialised) type.In the method, whether RNC indicates Target cell SFN identical with cell-of-origin SFN, and under same case, UE no longer reads the SFN of Target cell and directly utilizes cell-of-origin SFN to calculate CFN.Shorten the time delay that the time of carrying out is rebuild (Time re-initialised) direct-cut operation in identical SFN minizone so greatly, improved switch speed.
Description of drawings
Fig. 1 rebuilds a kind of time the workflow schematic diagram that shortens the method for SFN time for reading in the direct-cut operation of (Time re-initialised) type;
Fig. 2 rebuilds a kind of time the embodiment that shortens the method for SFN time for reading in the direct-cut operation of (Time re-initialised) type.
Embodiment
The present invention has described the method that shortens the SFN time for reading in the direct-cut operation that a kind of time rebuilds (Time re-initialised) type according to the consensus standard message interaction process.
As shown in Figure 1, workflow of the present invention may further comprise the steps:
Step S101, the RNC judgement initiation time is rebuild direct-cut operation, the value that RNC reshuffles at physical channel, transmission channel is reshuffled or RB such as reshuffles at the cell " Timing indication " that carries in the message is " initialize ", just the expression time of having initiated rebuilds the indication information of direct-cut operation (the DOFF value is exactly Default DPCH Offset Value, be that time reconstruction direct-cut operation is peculiar, be used for recomputating CFN);
Step S102, RNC sends the physical channel reconfiguration message to UE, and simultaneously, whether RNC is identical with cell-of-origin SFN timing at the physical channel reconfiguration message middle finger mark cell SFN that makes eye bright;
After step S103, UE receive the physical channel reconfiguration message, judge that whether comprising the time in the reconfiguration message rebuilds the indication information of direct-cut operation,, then begin to recomputate CFN,, then stop this process if do not comprise if comprise;
Step S104 judges whether the SFN of Target cell is regularly identical with the SFN timing of cell-of-origin, if identical, then enters step S105, if inequality, then enters step S106;
Step S105, UE directly utilize cell-of-origin SFN to calculate CFN;
Step S106, UE read the SFN information of Target cell again, and recomputate CFN according to the SFN information of Target cell;
Step S107, UE finishes physical channel and reshuffles, and reshuffles to RNC answer physical channel and finishes message.
As shown in Figure 2, consensus standard message interaction process involved in the present invention is as follows:
RNC sends physical channel reconfiguration message (Physical Channel Reconfiguration) to UE, also may be RB (Radio Bearer, radio bearer) reconfiguration message or transmission channel reconfiguration message herein.Indicating switching mode in the message is the time to rebuild (Time re-initialised) direct-cut operation.Simultaneously, whether RNC is regularly regularly consistent with the SFN of cell-of-origin at the make eye bright SFN of mark sub-district of this message middle finger.Whether for example can specify an information unit IE (Information Element) to represent regularly in this message consistent, (this IE is discarded by agreement can to adopt optional IE Cfntargetsfnframeoffset at present, that is to say it is an invalid IE, can ignore this value after UE receives.In follow-up protocol version, be renamed as dummy.The present invention has utilized this discarded IE, so can not produce compatible problem.) represent whether Target cell SFN is regularly regularly consistent with cell-of-origin SFN, just represent inconsistently if carry this IE, need UE to obtain Target cell SFN again; Just do not represent that Target cell SFN is regularly consistent with the cell-of-origin if do not carry this IE, UE can continue to use original SFN.
UE receives that the judgement of physical channel reconfiguration message (Physical Channel Reconfiguration) back requires the time of carrying out to rebuild (Time re-initialised) direct-cut operation.This moment, UE judged whether Target cell SFN is regularly regularly consistent with cell-of-origin SFN.If inconsistent, then UE reads the SFN information of Target cell again, and utilizes the value that newly reads to recomputate CFN; If consistent, then UE continues to use original SFN, and directly utilizes original SFN to calculate CFN.After UE finishes physical channel and reshuffles, reshuffle to RNC stimulating food reason channel and to finish message (Physical Channel Reconfiguration Complete) (or after finishing SB and reshuffling, to RNC send SB reshuffle finish message or finish transmission channel reshuffle after, to RNC send transmission channel reshuffle finish message).
RNC receives that physical channel is reshuffled and finishes (Physical Channel Reconfiguration Complete) after the message, thinks that the physical channel reconfiguration course finishes.
By above-mentioned flow process, rebuild in (Time re-initialised) direct-cut operation in the time, if Target cell is regularly consistent with cell-of-origin SFN, then UE has saved the time of the SFN that reads Target cell, effectively reduce handover delay, accelerated switch speed.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; being familiar with those of ordinary skill in the art ought can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (7)
1. a time is rebuild the method that shortens the System Frame Number time for reading in the direct-cut operation, it is characterized in that, comprising:
Step 1, the radio network controller initiation time is rebuild direct-cut operation, and sends reconfiguration message to portable terminal, and whether the make eye bright System Frame Number of mark sub-district of described reconfiguration message middle finger is regularly regularly consistent with the System Frame Number of cell-of-origin;
Step 2, described portable terminal is received described reconfiguration message, whether the System Frame Number of judging described Target cell according to described reconfiguration message is regularly regularly identical with the System Frame Number of described cell-of-origin, if it is identical, then described portable terminal uses the System Frame Number of described cell-of-origin to calculate Connection Frame Number, if inequality, then described portable terminal reads the System Frame Number of described Target cell again;
Step 3 after described portable terminal is finished and reshuffled, is returned to reshuffle to described radio network controller and is finished response.
2. the time according to claim 1 is rebuild the method that shortens the System Frame Number time for reading in the direct-cut operation, it is characterized in that described reconfiguration message further comprises: physical channel reconfiguration message, radio bearer reconfiguration message or transmission channel reconfiguration message.
3. the time according to claim 2 is rebuild the method that shortens the System Frame Number time for reading in the direct-cut operation, it is characterized in that described step 3 further comprises:
After described portable terminal is finished physical channel and reshuffled, return physical channel to described radio network controller and reshuffle and finish message; Perhaps
After described portable terminal is finished radio bearer and reshuffled, return radio bearer to described radio network controller and reshuffle and finish message; Perhaps
After described portable terminal is finished transmission channel and reshuffled, return transmission channel to described radio network controller and reshuffle and finish message.
4. the time according to claim 1 is rebuild the method that shortens the System Frame Number time for reading in the direct-cut operation, it is characterized in that, described reconfiguration message also comprises the indication information of initiation time reconstruction direct-cut operation.
5. the time according to claim 4 is rebuild the method that shortens the System Frame Number time for reading in the direct-cut operation, it is characterized in that, in the described step 2 at the System Frame Number of judging described Target cell regularly with before whether the System Frame Number of described cell-of-origin regularly identical, also comprise:
Described portable terminal is judged the indication information that whether comprises described initiation time reconstruction direct-cut operation in the described reconfiguration message, if comprise described information, think that then the described radio network controller time of initiation rebuilds direct-cut operation, if do not comprise described information, then stop the time reconstruction direct-cut operation that described radio network controller is initiated.
6. the time according to claim 1 and 2 is rebuild the method that shortens the System Frame Number time for reading in the direct-cut operation, it is characterized in that described step 1 further comprises:
When described Target cell System Frame Number timing and described cell-of-origin System Frame Number are regularly inconsistent, in described reconfiguration message, carry appointed information unit IE, when described Target cell System Frame Number is regularly regularly consistent with described cell-of-origin System Frame Number, in described reconfiguration message, do not carry described appointed information unit IE.
7. the time according to claim 6 is rebuild the method that shortens the System Frame Number time for reading in the direct-cut operation, it is characterized in that described step 2 further comprises:
Described portable terminal judges whether comprise described IE in the described reconfiguration message, if comprise described IE, then described Target cell System Frame Number is regularly regularly inconsistent with described cell-of-origin System Frame Number, described portable terminal reads the System Frame Number of described Target cell again, System Frame Number according to described Target cell calculates described Connection Frame Number, if do not comprise described IE, then the System Frame Number of described Target cell is regularly regularly consistent with described cell-of-origin System Frame Number, and described portable terminal directly utilizes the System Frame Number of described cell-of-origin to calculate described Connection Frame Number.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200610114699XA CN101193412B (en) | 2006-11-21 | 2006-11-21 | Method for shortening reading time of system frame number in item-reestablishment hard switch |
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| CN200610114699XA CN101193412B (en) | 2006-11-21 | 2006-11-21 | Method for shortening reading time of system frame number in item-reestablishment hard switch |
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| CN101193412A CN101193412A (en) | 2008-06-04 |
| CN101193412B true CN101193412B (en) | 2010-12-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9408122B2 (en) * | 2011-01-11 | 2016-08-02 | Mediatek, Inc. | Obtaining system frame number of target cell during handover |
| US9088919B2 (en) * | 2012-04-13 | 2015-07-21 | Qualcomm Incorporated | Method and apparatus for expedited wireless device handover |
| CN105578535A (en) * | 2014-10-08 | 2016-05-11 | 展讯通信（上海）有限公司 | Cell hard handover processing system, cell hard handover processing method and mobile terminal |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1466294A (en) * | 2002-06-06 | 2004-01-07 | 华为技术有限公司 | Method for obtaining initial connection frame number in broadband CDMA mobile communication system |
| CN1735271A (en) * | 2005-06-30 | 2006-02-15 | 凯明信息科技股份有限公司 | Hard handoff method and device and TD-SCDMA system using same method and device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1466294A (en) * | 2002-06-06 | 2004-01-07 | 华为技术有限公司 | Method for obtaining initial connection frame number in broadband CDMA mobile communication system |
| CN1735271A (en) * | 2005-06-30 | 2006-02-15 | 凯明信息科技股份有限公司 | Hard handoff method and device and TD-SCDMA system using same method and device |
Non-Patent Citations (1)
| Title |
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| CN 1466294 A,全文. |
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