CN108401272A - A kind of residence reselecting of TD-SCDMA terminals - Google Patents
A kind of residence reselecting of TD-SCDMA terminals Download PDFInfo
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- CN108401272A CN108401272A CN201810348888.6A CN201810348888A CN108401272A CN 108401272 A CN108401272 A CN 108401272A CN 201810348888 A CN201810348888 A CN 201810348888A CN 108401272 A CN108401272 A CN 108401272A
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- cell
- user terminal
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- adjacent
- frequency
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
Abstract
The invention discloses a kind of residence reselectings of TD SCDMA terminals, include the following steps：Step 1, after user terminal UE is successfully resident a serving cell, the serving cell and corresponding adjacent cell are periodically measured, measured value is obtained, specifically triggers which cell measures the parameter S broadcasted by system message1And the reception value S of cell itselfxIt codetermines；Step 2, according to the measured value of acquisition, cell reselection is carried out.
Description
Technical field
The present invention relates to a kind of residence reselectings of TD-SCDMA terminals.
Background technology
In order to ensure under the geographical conditions of various complexity, user terminal (UE, User Equipment) can obtain compared with
For good signal, the mobility functions such as cell reselection, switching, cell update are just very necessary, and cell reselection is and end
The process that end mobility is closely related, specifically, cell reselection process exactly makes successfully to reside in some cell
Terminal can select and be resident another process for being more suitable for cell, still, this, which is found, is more suitable for the gravity treatment of cell
Journey will necessarily be such that UE is in a kind of unsure state, so, while carrying out gravity treatment, it is necessary to use certain means
It avoids frequent gravity treatment from shaking, allows UE is metastable to reside in some cell, it is seen then that searching is more suitable for cell
Gravity treatment and the resident of holding UE stabilizations are a natural contradiction, can only obtain certain opposite balance wherein.
Invention content
For the wireless resource management (RRC, Radio Resource Control) of higher-layer protocols, cell reselection can
Be divided into idle mode under cell reselection and connection mode under cell reselection, either at the idling mode or connecting
Under pattern, cell reselection is required for meeting certain trigger condition and threshold value, and the cell reselection under idle mode is
With (the bibliography of measured value close ties together：The control of the .TD-SCDMA terminal wireless resources such as Yang Liming, Zheng Jianhong
Research on idle mode Post and Telecommunications Institutes Of Chongqing journal, 2005,17 (3)), the present invention is directed to the cell reselection problem under idle mode,
A kind of residence reselecting of TD-SCDMA terminals is provided, is included the following steps：
Step 1, after user terminal UE is successfully resident a serving cell, to the serving cell and corresponding adjacent cell
It carries out periodically measuring (bibliography：3GPP TS25.123V4.1.0radio resource management(TDD)
[EB/OL] (2001-12-11)), measured value is obtained, specifically triggers which cell measures the parameter broadcasted by system message
S1And the reception value S of cell itselfxIt codetermines；
Step 2, according to the measured value of acquisition, cell reselection is carried out.
Step 1 includes the following steps：
Step 1-1 calculates the reception value S of cell itself according to following formulax：
Sx=Q1-Q2-P1,
Wherein, Q1Indicate received signal code power RSCP (the Received Signal measured on P-CCPCH channels
Code Power) measured value, Q2Indicate the minimal detectable power required by cell, P1=max (UEmax-Pmax, 0), UEmaxIt indicates
User terminal allows to use most in multi-upstream access on random access channel RACH (Random Access Channel)
Big transmission power, PmaIndicate that the maximum radio frequency transmission power of user terminal, max () expressions are maximized function；
Step 1-2, according to SxObtain the trigger condition that co-frequency cell and alien-frequency district measure：The triggering that co-frequency cell measures
Condition is：If Sx>S1, user terminal UE is without intra-frequency cells measurement；If Sx≦S1, user terminal UE progress is the same as frequency
Cell measurement；If there is no the parameter S of broadcast service cell in system message1, also carry out the measurement of co-frequency cell；
Alien-frequency district measure trigger condition be：If Sx>S1, cell measurements of the user terminal UE without alien frequencies；If
Sx≦S1, the cell measurement of user terminal UE progress alien frequencies；If there is no the parameter S of broadcast service cell in system message1,
Carry out the measurement of alien-frequency district；
Step 1-3, the measured value finally obtained are denoted as：QM, sIndicate the serving cell received signal code probability RSCP measured
Measured value, QM, nIndicate the adjacent cell received signal code probability RSCP measured values measured.
Step 2 includes the following steps：
Step 2-1, it is assumed that cell does not all use layered cell structure HCS (Hierarchical Cell Structure),
Re-selecting cell must satisfy two conditions：First, which meets cell and is resident condition, i.e. Sx>0；Second, the gravity treatment is small
The priority R in areanHighest, and Rn>Rs, subscript behalf serving cell, subscript n represents adjacent cell, RsIndicate serving cell
Priority；
Step 2-2, quality standard, that is, priority R of serving cellsWith quality standard, that is, priority R of adjacent cellnDetermine
Justice is as follows respectively：
Rs=QM, s+QH, s,
Rn=QM, n+Q3-TOn×(1-Ln),
TOn=Temp × W (Pt),
Wherein, if PRI (Primary Rate Interface) Primary Rate Interface of serving cell and adjacent cell
It is identical, then Ln=0, if serving cell is different with the PRI Primary Rate Interface of adjacent cell, Ln=1；Work as Pt<When 0, W
(Pt)=0, works as PtWhen >=0, W (Pt)=1；QH, sIndicate lagged value when cell reselection, Q3Indicate that regulation cell reselection is two small
The offset in area, that is, between serving cell and adjacent cell；Temp is indicated in time PtLasting period, be adjacent cell RnParameter
Add an offset；PtIndicate the Temp effective duration of adjacent cell；
Step 2-3, timer PtEach adjacent cell is acted on, the premise of layered cell structure is not used in cell
Under, when meeting following trigger condition, PtThe timing since starting 0：
QM, n>QM, s+Q3,
As triggering PtEntry condition when no longer meeting, with the relevant P in adjacent celltJust stop timing, TO immediatelynValue
Only in relevant PtDuring operation just effectively, as adjacent cell adds an offset, to avoid frequent cell reselection；
In cell reselection process, and if PtCorresponding cell is no longer the adjacent cell of new demand servicing cell, or presses new demand servicing cell
Parameter calculate PtTrigger condition when no longer meeting, PtAll stop immediately, conversely, PtIt continues to run with, finally according to RnValue weight
Select cell, i.e. Rn>RsWhen, gravity treatment adjacent cell is serving cell.
Advantageous effect：The present invention analyzes cell reselection strategies, provides a kind of cell of TD-SCDMA terminals
Reselecting method has certain reference value to TD-SCDMA commercializations.
Description of the drawings
The present invention is done with reference to the accompanying drawings and detailed description and is further illustrated, it is of the invention above-mentioned or
Otherwise advantage will become apparent.
Fig. 1 is flow chart of the present invention.
Specific implementation mode
The present invention will be further described with reference to the accompanying drawings and embodiments.
As shown, the present invention provides a kind of residence reselecting of TD-SCDMA terminals, include the following steps：
Step 1, after user terminal UE is successfully resident a serving cell, to the serving cell and corresponding adjacent cell
It carries out periodically measuring (bibliography：3GPP TS25.123 V4.1.0 radio resource management(TDD)
[EB/OL] (2001-12-11)), measured value is obtained, specifically triggers which cell measures the parameter broadcasted by system message
S1And the reception value S of cell itselfxIt codetermines；
Step 2, according to the measured value of acquisition, cell reselection is carried out.
Step 1 includes the following steps：
Step 1-1 calculates the reception value S of cell itself according to following formulax：
Sx=Q1-Q2-P1,
Wherein, Q1Indicate received signal code power RSCP (the Received Signal measured on P-CCPCH channels
Code Power) measured value, Q2Indicate the minimal detectable power required by cell, P1=max (UEmax-Pmax, 0), UEmaxIt indicates
User terminal allows to use most in multi-upstream access on random access channel RACH (Random Access Channel)
Big transmission power, PmaIndicate that the maximum radio frequency transmission power of user terminal, max () expressions are maximized function；
Step 1-2, according to SxObtain the trigger condition that co-frequency cell and alien-frequency district measure：The triggering that co-frequency cell measures
Condition is：If Sx>S1, user terminal UE is without intra-frequency cells measurement；If Sx≦S1, user terminal UE progress is the same as frequency
Cell measurement；If there is no the parameter S of broadcast service cell in system message1, also carry out the measurement of co-frequency cell；
Alien-frequency district measure trigger condition be：If Sx>S1, cell measurements of the user terminal UE without alien frequencies；If
Sx≦S1, the cell measurement of user terminal UE progress alien frequencies；If there is no the parameter S of broadcast service cell in system message1,
Carry out the measurement of alien-frequency district；
Step 1-3, the measured value finally obtained are denoted as：QM, sIndicate the serving cell received signal code probability RSCP measured
Measured value, QM, nIndicate the adjacent cell received signal code probability RSCP measured values measured.
Step 2 includes the following steps：
Step 2-1, it is assumed that cell does not all use layered cell structure HCS (Hierarchical Cell Structure),
Re-selecting cell must satisfy two conditions：First, which meets cell and is resident condition, i.e. Sx>0；Second, the gravity treatment is small
The priority R in areanHighest, and Rn>Rs, subscript behalf serving cell, subscript n represents adjacent cell, RsIndicate serving cell
Priority；
Step 2-2, quality standard, that is, priority R of serving cellsWith quality standard, that is, priority R of adjacent cellnDetermine
Justice is as follows respectively：
Rs=QM, s+QH, s,
Rn=QM, n+Q3-TOn×(1-Ln),
TOn=Temp × W (Pt),
Wherein, if PRI (Primary Rate Interface) Primary Rate Interface of serving cell and adjacent cell
It is identical, then Ln=0, if serving cell is different with the PRI Primary Rate Interface of adjacent cell, Ln=1；Work as Pt<When 0, W
(Pt)=0, works as PtWhen >=0, W (Pt)=1；QH, sIndicate lagged value when cell reselection, Q3Indicate that regulation cell reselection is two small
The offset in area, that is, between serving cell and adjacent cell；Temp is indicated in time PtLasting period, be adjacent cell RnParameter
Add an offset；PtIndicate the Temp effective duration of adjacent cell；
Step 2-3, timer PtEach adjacent cell is acted on, the premise of layered cell structure is not used in cell
Under, when meeting following trigger condition, PtThe timing since starting 0：
QM, n>QM, s+Q3,
As triggering PtEntry condition when no longer meeting, with the relevant P in adjacent celltJust stop timing, TO immediatelynValue
Only in relevant PtDuring operation just effectively, as adjacent cell adds an offset, to avoid frequent cell reselection；
In cell reselection process, and if PtCorresponding cell is no longer the adjacent cell of new demand servicing cell, or presses new demand servicing cell
Parameter calculate PtTrigger condition when no longer meeting, PtAll stop immediately, conversely, PtIt continues to run with, finally according to RnValue weight
Select cell, i.e. Rn>RsWhen, gravity treatment adjacent cell is serving cell.
In step 1 of the present invention, to avoid gravity treatment from shaking, when user terminal UE is successfully resident a serving cell 1s or more
When, then the serving cell and corresponding adjacent cell are periodically measured.
The present invention provides a kind of residence reselecting of TD-SCDMA terminals, implement the technical solution method and
There are many approach, the above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.All undefined components in this embodiment can be implemented in the prior art.
Claims (3)
1. a kind of residence reselecting of TD-SCDMA terminals, which is characterized in that include the following steps：
Step 1, after user terminal UE is successfully resident a serving cell, the serving cell and corresponding adjacent cell are carried out
It periodically measures, obtains measured value, specifically trigger which cell measures the parameter S broadcasted by system message1And it is small
The reception value S in area itselfxIt codetermines；
Step 2, according to the measured value of acquisition, cell reselection is carried out.
2. according to the method described in claim 1, it is characterized in that, step 1 includes the following steps：
Step 1-1 calculates the reception value S of cell itself according to following formulax：
Sx=Q1-Q2-P1,
Wherein, Q1Indicate the received signal code power RSCP measured values measured on P-CCPCH channels, Q2It indicates required by cell
Minimal detectable power, P1=max (UEmax-Pmax, 0), UEmaxUser terminal is indicated in multi-upstream access, is believed in random access
Allow the maximum transmission power used, P on road RACHmaIndicate that the maximum radio frequency transmission power of user terminal, max () expressions take
Max function；
Step 1-2, according to SxObtain the trigger condition that co-frequency cell and alien-frequency district measure：The trigger condition that co-frequency cell measures
For：If Sx>S1, user terminal UE is without intra-frequency cells measurement；If Sx≦S1, user terminal UE progress is the same as the small of frequency
Region measurement；If there is no the parameter S of broadcast service cell in system message1, also carry out the measurement of co-frequency cell；
Alien-frequency district measure trigger condition be：If Sx>S1, cell measurements of the user terminal UE without alien frequencies；If Sx≦
S1, the cell measurement of user terminal UE progress alien frequencies；If there is no the parameter S of broadcast service cell in system message1, also carry out
The measurement of alien-frequency district；
Step 1-3, the measured value finally obtained are denoted as：QM, sIndicate that the serving cell received signal code probability RSCP measured is measured
Value, QM, nIndicate the adjacent cell received signal code probability RSCP measured values measured.
3. according to the method described in claim 2, it is characterized in that, step 2 includes the following steps：
Step 2-1, it is assumed that cell does not all use layered cell structure HCS, and re-selecting cell must satisfy two conditions：First, it should
Re-selecting cell meets cell and is resident condition, i.e. Sx>0；Second, the priority R of the re-selecting cellnHighest, and Rn>Rs, subscript s generations
Table serving cell, subscript n represent adjacent cell, RsIndicate the priority of serving cell；
Step 2-2, quality standard, that is, priority R of serving cellsWith quality standard, that is, priority R of adjacent cellnDefinition point
It is not as follows：
Rs=QM, s+QH, s,
Rn=QM, n+Q3-TOn×(1-Ln),
TOn=Temp × W (Pt),
Wherein, if serving cell is identical with the PRI Primary Rate Interface of adjacent cell, Ln=0, if serving cell and neighbour
The PRI Primary Rate Interface of nearly cell is different, then Ln=1；Work as Pt<When 0, W (Pt)=0, works as PtWhen >=0, W (Pt)=1；QH, sTable
Show lagged value when cell reselection, Q3Indicate the offset of regulation cell reselection two cells, that is, between serving cell and adjacent cell
Amount；Temp is indicated in time PtLasting period, be adjacent cell RnParameter adds an offset；PtIndicate adjacent cell
The Temp effective duration；
Step 2-3, timer PtEach adjacent cell is acted on, under the premise of cell does not use layered cell structure, when full
When being enough lower trigger condition, PtThe timing since starting 0：
QM, n>QM, s+Q3,
As triggering PtEntry condition when no longer meeting, with the relevant P in adjacent celltJust stop timing, TO immediatelynValue only have
In relevant PtDuring operation just effectively, as adjacent cell adds an offset, to avoid frequent cell reselection；Small
In area's reuse adoption process, and if PtCorresponding cell is no longer the adjacent cell of new demand servicing cell, or the ginseng by new demand servicing cell
Number calculates PtTrigger condition when no longer meeting, PtAll stop immediately, conversely, PtIt continues to run with, finally according to RnValue gravity treatment it is small
Area, i.e. Rn>RsWhen, gravity treatment adjacent cell is serving cell.
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| CN201810348888.6A CN108401272A (en) | 2018-04-18 | 2018-04-18 | A kind of residence reselecting of TD-SCDMA terminals |
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| CN201810348888.6A CN108401272A (en) | 2018-04-18 | 2018-04-18 | A kind of residence reselecting of TD-SCDMA terminals |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11792712B2 (en) | 2021-12-23 | 2023-10-17 | T-Mobile Usa, Inc. | Cell reselection priority assignment based on performance triggers |
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2018
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