CN101651961B - Method and terminal for reselecting cell - Google Patents
Method and terminal for reselecting cell Download PDFInfo
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- CN101651961B CN101651961B CN2009101339248A CN200910133924A CN101651961B CN 101651961 B CN101651961 B CN 101651961B CN 2009101339248 A CN2009101339248 A CN 2009101339248A CN 200910133924 A CN200910133924 A CN 200910133924A CN 101651961 B CN101651961 B CN 101651961B
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- 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
- H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
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- 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 method and a terminal for reselecting a cell, belonging to the field of mobile communication. The method comprises the following steps: measuring adjacent cells by the terminal in a current macro cell according to a measuring condition; setting cell reselecting parameters of the measured adjacent cells according to the measured signal quality information of the adjacent cells; and selecting the cells with higher immigration levels than the macro cell from the measured adjacent cells according to the set cell reselecting parameters. The terminal comprises a measuring module, a setting module and a selecting module. The invention can realize the immigration of the cells with high immigration levels by the terminal and reduce interferences after the immigration of the terminal. Compared with the prior art, the invention reduces the mutual interferences between the terminal and an HNB cell.
Description
Technical field
The present invention relates to moving communicating field, particularly a kind of method of cell reselection and terminal.
Background technology
Development along with GSM; User's demand is also more and more diversified; For variation also appears in the equipment that adapts to this demand communication system, comprising: the inside coverage base station of covering and enterprise-level in the family room that occurs in recent years, and some other limited networks; For example; HNB (Home NodeB, Home eNodeB) sub-district, Home Cell (home cell), Access Point (access point), Private Network (private network) or Private Cell (private cell), and the limited network of some CF layer etc.
Wherein, HNB is called femto cell (femtocell net base station is called the 3G access point again) again, can with the legacy network equipment seamless link of operator.HNB can make full use of the existing broadband access resource of user, for the user provides FMC (move with fixed network and merge) business.The mobile services a large amount of through HNB are absorbed by indoor household base station, can reduce the quantity of operator's macrocellular greatly, for operator practices thrift equipment investment expense and maintenance cost, are both economical indoor signal soverlay techniques.
In the prior art, HNB is divided into Closed Access (sealing family expenses sub-district) and two kinds of Open Access (opening family expenses sub-district).Wherein, Closed Access is called CSG (Closed Subscriber Group, closed signed user group) again, if the user is signed in in the CSG or is added in the CSG by the owner of CSG, then this user is can be in CSG normal resident and use professional; Do not have the user signatory and that do not added in the CSG then can't be normally resident in CSG, can't use business yet by the owner of CSG.CSG user comprises owner (owner) and guest (guest).In Open Access, can enjoy the service of this sub-district by all users of operator's authentication, Open Access can satisfy macrocell and cover the demand of omitting point.
In realizing process of the present invention, the inventor finds that there is following shortcoming at least in above-mentioned prior art:
The radio wave in CSG when operation can cause the descending interference of HNB to non-CSG (non-CSG) terminal in the macrocell, and the radio wave during the non-CSG terminal works in the macrocell also can be given and the terminal among the HNB caused up/descending interference.
Summary of the invention
In order to reduce terminal and the phase mutual interference between the HNB sub-district in the macrocell, the embodiment of the invention provides a kind of method of cell reselection and terminal.Said technical scheme is following:
On the one hand, the embodiment of the invention provides a kind of method of cell reselection, and said method comprises:
The terminal is measured neighbor cell according to measuring condition in the macrocell at current place;
According to the signal quality information of the neighbor cell of measuring, the cell reselection parameters of the said neighbor cell of measuring is set;
From the said neighbor cell of measuring, select to move into the rank sub-district higher according to said cell reselection parameters than the immigration rank of said macrocell;
Wherein, said terminal is measured neighbor cell according to measuring condition in the macrocell at current place, specifically comprises:
According to the common frequency measurement condition of obtaining, measure and the neighbor cell of said macrocell with frequency;
The type of the homogeneous frequency adjacent area that identification is measured;
When the sub-district of satisfying the district reselecting condition in the said homogeneous frequency adjacent area of measuring is semi-open family expenses sub-district,, measure the alien frequencies neighbor cell of said macrocell according to the different-frequency measure condition of obtaining.
On the other hand, the embodiment of the invention also provides a kind of terminal, and said terminal comprises:
Measurement module is used for neighbor cell being measured according to measuring condition at the macrocell at current place;
Module is set, and the signal quality information of the neighbor cell that is used for measuring according to said measurement module is provided with the cell reselection parameters of the said neighbor cell of measuring;
Select module, be used for the cell reselection parameters that module is provided with being set, from the neighbor cell that said measurement module is measured, select to move into the immigration rank high sub-district of rank than place, said terminal macrocell according to said;
Wherein, said measurement module comprises:
The common frequency measurement unit is used for according to the common frequency measurement condition of obtaining, and measures and the neighbor cell of said macrocell with frequency;
First recognition unit is used to discern the type of the homogeneous frequency adjacent area of measuring said common frequency measurement unit;
The different-frequency measure unit; Be used for when learning, in the homogeneous frequency adjacent area that said common frequency measurement unit is measured, when the sub-district of satisfying the district reselecting condition is semi-open family expenses sub-district according to said first recognition unit; According to the different-frequency measure condition of obtaining, measure the alien frequencies neighbor cell of said macrocell.
Another aspect, the embodiment of the invention also provide a kind of method of cell reselection, and said method comprises:
The terminal is measured neighbor cell according to preset measuring condition in the macrocell at current place;
It is sealing family expenses sub-districts that the sub-district is arranged in the neighbor cell of measuring, and this terminal is when sealing home terminal, according to the signal quality information of the neighbor cell of measuring, in the sealing family expenses sub-district of measuring, to confirm to satisfy pre-conditioned sealing family expenses sub-district;
Judge the sealing family expenses sub-district that whether has terminal unit contractual in the said sealing family expenses sub-district of determining, if, determine whether to move into said signatory sealing family expenses sub-district then according to the signal quality thresholding of said signatory sealing family expenses sub-district.
On the one hand, the embodiment of the invention also provides a kind of terminal again, and said terminal comprises:
Measurement module is used for the macrocell at current place, said terminal, according to preset measuring condition neighbor cell is measured;
Determination module; It is sealing family expenses sub-districts that the neighbor cell that is used for measuring when said measurement module has the sub-district; And when this terminal is the sealing home terminal; According to the signal quality information of the neighbor cell of measuring, in the sealing family expenses sub-district of measuring, confirm to satisfy pre-conditioned sealing family expenses sub-district;
The gravity treatment module; Be used for judging whether sealing family expenses sub-district that said determination module is determined exists the sealing family expenses sub-district of said terminal unit contractual; If, determine whether to move into said signatory sealing family expenses sub-district then according to the signal quality thresholding of said signatory sealing family expenses sub-district.
The beneficial effect of the technical scheme that the embodiment of the invention provides is:
The embodiment of the invention can realize that the terminal is moved into and move into the high sub-district of rank, the interference that the terminal receives after moving into reduces, and compared with prior art, reduced the mutual interference mutually between terminal and the HNB sub-district.
Description of drawings
Fig. 1 is the method for cell reselection simplified flow chart that the embodiment of the invention one provides;
Fig. 2 is the method for cell reselection simplified flow chart that the embodiment of the invention two provides;
Fig. 3 is the method for cell reselection simplified flow chart that the embodiment of the invention three provides;
Fig. 4 is the terminal simplified structure sketch map that the embodiment of the invention four provides;
Fig. 5 is the simplified structure sketch map at the terminal that provides of the embodiment of the invention five.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that embodiment of the present invention is done to describe in detail further below.
There is polytype sub-district in the embodiment of the invention, comprising: macrocell, open family expenses sub-district, sealing family expenses sub-districts (CSG sub-district) and semi-open family expenses sub-district (Semi-Open Access Cell) etc.Wherein, Open family expenses sub-district allows all terminals to insert; Comprise CSG terminal (promptly this semi-open family expenses sub-district is in the white list at this terminal) and non-CSG terminal (promptly this semi-open family expenses sub-district is not in the white list at this terminal, or this terminal do not have white list, or the family expenses sub-district is not supported at this terminal); Promptly open family expenses sub-district is to the not restriction of type at terminal, and open family expenses sub-district can be inserted in the terminal of any kind.Sealing family expenses sub-district allows the CSG terminal to insert, but not the CSG terminal then can not be inserted.Semi-open family expenses sub-district allows CSG terminal and (passerby terminal, passerby terminal; Claim the passerby terminal again) insert, promptly for semi-open family expenses sub-district, CSG terminal and passerby terminal all are legal users; The CSG terminal is than the semi-open family expenses of preferential access sub-district, passerby terminal; Business can be enjoyed in the CSG terminal in semi-open family expenses sub-district, and for the passerby terminal, it is high that professional priority is enjoyed at the CSG terminal; The behavior of passerby terminal in semi-open family expenses sub-district then is restricted, and includes but not limited to: 1) the passerby terminal is allowed to reside in the semi-open family expenses sub-district and still can not enjoys business; 2) the passerby terminal is allowed to reside in the semi-open family expenses sub-district and can enjoys limited business, and this limited business includes but not limited to: the limited professional and limited business of service number of types of business, COS that service quality is limited.3) when semi-open family expenses local resource is limited, preferentially insert the CSG terminal, promptly; If this semi-open family expenses sub-district is in the white list at certain terminal; The priority ratio other-end priority at general this terminal is high, calculates the result based on terminal information by different weights, according to this result is sorted in the terminal under the HNB; Said terminal information comprises the priority of terminal in the sub-district, in service priority, class of business and the service rate one of at least; Preferably; Sort according to aforementioned calculation result order from high to low, it is higher at the service feature at preceding terminal to sort, ordering after the service feature at terminal lower; Therefore can the minimum UE of ordering be switched to other sub-districts, or reduce the minimum UE service rate of ordering; Or at least a business in the minimum UE voice and packet data concurrent service of deletion ordering.Wherein, preferably, can be provided with the weight of the priority of terminal in the sub-district the highest.If the switching between the different system before selecting to switch UE, should consider whether goal systems supports this to be about to the business of the UE of incision.
For example: semi-open family expenses sub-district can provide the bandwidth of 200MB, but the bandwidth of 100MB only is provided for the passerby terminal; Business such as semi-open family expenses sub-district can provide and make a phone call, online, but business of networking is provided only for the passerby terminal; Semi-open family expenses sub-district can provide 10 kinds of business, but 6 kinds of business or the like only is provided for the passerby terminal.Semi-open family expenses sub-district in the embodiment of the invention all has a CSG sign with sealing family expenses sub-district, like CSG ID.
Embodiment one
Referring to Fig. 1, the embodiment of the invention provides a kind of method of cell reselection, and this method comprises:
Step 101: the terminal is measured neighbor cell according to measuring condition in the macrocell at current place;
Wherein, measuring condition can be preset in this locality, also can obtain from other places, and the embodiment of the invention is not done concrete qualification.
Step 102:, the cell reselection parameters of the neighbor cell of measuring is set according to the signal quality information of the neighbor cell of measuring;
Step 103: from the neighbor cell of measuring, select to move into the rank sub-district higher than the immigration rank of said macrocell according to the cell reselection parameters that is provided with.
In the present embodiment; The terminal is provided with cell reselection parameters according to the cell signal quality information of measuring, and selects to move into the high sub-district of rank according to the cell reselection parameters that is provided with, and the interference that the terminal receives after moving into reduces; Compared with prior art, reduced mutual interference mutually between terminal and the HNB sub-district.
Embodiment two
Referring to Fig. 2, the embodiment of the invention also provides a kind of method of cell reselection, and sub-district, current place, the terminal in the present embodiment is a macrocell, does not have the CSG sub-district at this terminal in the neighbor cell, and this method specifically comprises:
Step 201: the terminal receives the broadcast of this macrocell in the macrocell at current place; Usually can carry multiple parameter in this broadcast; Include but not limited to: the priority of frequency range, the measurement thresholding of this macrocell under the ID of this macrocell, this macrocell; Parameter of adjacent cell information and district reselecting or the like; Wherein, measure the different system thresholding that adopts when thresholding comprises same frequency thresholding, the alien frequencies thresholding that adopts when measuring alien-frequency district that adopts when measuring co-frequency cell and measures different system cell, this co-frequency cell is meant and the identical sub-district of current macrocell frequency; This alien-frequency district is meant and the different sub-district of current macrocell frequency that different system is meant different Radio Network Systems.
Step 202: the terminal is measured homogeneous frequency adjacent area according to the common frequency measurement condition of obtaining in the macrocell at current place, obtains the signal quality information of homogeneous frequency adjacent area.
Neighbor cell in the present embodiment comprises: at least a in macrocell and the home base station cells, this home base station cells comprises: at least a in open family expenses sub-district, semi-open family expenses sub-district and the sealing family expenses sub-district.
Wherein, the terminal can be when the signal quality variation of current macrocell, initiates the measurement to neighbor cell, when the signal quality that detects current macrocell like the terminal reaches preset common frequency measurement threshold value, then initiates the measurement to neighbor cell.Present embodiment is not got rid of the terminal and when satisfying other condition, is initiated the measurement to neighbor cell.
Step 203: type identification is carried out to the homogeneous frequency adjacent area of measuring in the terminal.
In the embodiment of the invention, the process of type identification is carried out to the homogeneous frequency adjacent area of measuring in the terminal can be specific as follows:
The terminal identifies the type of discerning the homogeneous frequency adjacent area of measuring through the physical label or the cell type of sub-district.Wherein, the physical label of sub-district, the terminal can get access in the pilot tone process.Usually, network side can be reserved the physical label of different sections for dissimilar sub-districts, can identify the type of sub-district through the reservation section of this physical label.Particularly, network side can be with the physical label segmentation, every section sub-district that correspondence is dissimilar; Can comprise a plurality of physical labels in every section, for example, ID1 to ID10 is open family expenses sub-district; ID11 to ID20 is semi-open family expenses sub-districts; ID21 to ID30 is the CSG sub-district, when the sub-district physical label that in the pilot tone process, gets access to when the terminal is ID12, can judge that then this sub-district is semi-open family expenses sub-district or the like.Above-mentioned cell type sign can be carried in the message of broadcast channel, also can be through the transmission of Iur/X2 interface.The Iur interface is UTRA (Universal Telecommunication Radio Access; The general land wireless access) in the system; RNC (Radio Network Controller, radio network controller) is used for carrying out with other RNC the interface of signaling and data interaction; In Eutra (Evolved UTRA, the general land wireless access of evolution) system, eNB (base station) links to each other through adjacent eNB in " X2 interface " and the network, and is similar with the Iur mouth.
Step 204: when learning according to the homogeneous frequency adjacent area type of identification; When the sub-district of the satisfied district reselecting condition of presetting is with the semi-open family expenses of frequency sub-district in the homogeneous frequency adjacent area of measuring; The terminal is measured adjacent different frequency/different system cell according to the different-frequency measure condition of obtaining, and obtains the signal quality information of different frequency/different system cell.
Wherein, preset district reselecting condition is meant existing R criterion, promptly selects the signal quality information ordering at preceding neighbor cell, and this ordering is stronger than the signal quality of other neighbor cell at the signal quality of preceding neighbor cell.In the present embodiment, the neither one sub-district is with the frequency macrocell in the sub-district of the satisfied district reselecting condition of presetting, and all sub-districts of satisfying the district reselecting condition are with the semi-open family expenses of frequency sub-district.
Above-mentioned different-frequency measure condition has multiple, includes but not limited to: measure and be not less than neighbor cell of preset different frequency/different system thresholding or the like.The terminal can get access to this different-frequency measure condition from the broadcast that receives.For example, it is 10dB that the terminal gets access to the alien frequencies thresholding according to the broadcast of current macrocell, and then the alien-frequency district that adjacent and signal quality is not less than 10dB is measured at the terminal.
Step 205: the terminal is according to the signal quality information of the adjacent different frequency/different system cell of measuring; For the adjacent different frequency/different system cell of measuring is provided with cell reselection parameters; In the present embodiment, cell reselection parameters includes but not limited to: the priority of frequency range, the thresholding of the affiliated frequency range in sub-district, side-play amount (Qoffset)/sluggishness (Qhyst) of sub-district or the like under the sub-district.
Wherein, it is specific as follows the process of cell reselection parameters to be set:
Signal quality information according to the neighbor cell of measuring; In the neighbor cell of measuring, confirm to satisfy the sub-district of preset district reselecting condition; And discern the cell type that satisfies this district reselecting condition, the description in the process same 203 of identification cell type is repeated no more here;
If satisfy the sub-district of this district reselecting condition is different frequency/different system macrocell; Then the macrocell reselecting parameters of this different frequency/different system is set to move into the immigration rank that is superior to current place, terminal frequency range/system; In this case, possibly there is different frequency/different system semi-open family expenses sub-district in the neighbor cell of measuring, also possibly do not have different frequency/different system semi-open family expenses sub-district; Even there is different frequency/different system semi-open family expenses sub-district; Because above-mentioned different frequency/different system macrocell satisfies the district reselecting condition, i.e. signal quality ordering is preceding, and the semi-open family expenses sub-district ordering of this different frequency/different system after; Therefore pay the utmost attention to the different frequency/different system macrocell that satisfies the district reselecting condition, the immigration that the macrocell of this different frequency/different system promptly is set is superior to the immigration rank of current place, terminal frequency range/system;
If satisfy the sub-district of this district reselecting condition is different frequency/different system semi-open family expenses sub-district, and then the semi-open family expenses cell reselection parameters of this different frequency/different system is set to move into the immigration rank that rank is not higher than current place, terminal frequency range/system; In this case; There is different frequency/different system macrocell in the sub-district of measuring; But this different frequency/different system macrocell unmet district reselecting condition; Be signal quality a little less than, comparatively speaking, the interference that the interference ratio that the terminal receives in the more weak different frequency/different system macrocell of signal quality receives in the stronger different frequency/different system semi-open family expenses sub-district of signal quality is little; Therefore pay the utmost attention to the semi-open sub-district of current frequency range, so the immigration rank of the macrocell of this different frequency/different system is not higher than the immigration rank of current place, terminal frequency range/system.
The district reselecting condition of describing in the district reselecting condition and 204 in this step is identical.
Immigration rank in the present embodiment is meant whether the terminal moves into a sub-district easily, when the terminal moves into the sub-district, pays the utmost attention to the high sub-district of immigration rank and moves into.Particularly, the immigration rank that a sub-district is set is high, can comprise: be provided with that the priority of frequency range under this sub-district is high, that the thresholding of frequency range under this sub-district is set is low or that this sub-district is set is lower or the like than the side-play amount/sluggishness of current terminal persistent district.For example, the immigration that cell reselection parameters is set to the different frequency/different system is superior to the immigration rank of current place, terminal frequency range/system, and specifically comprise: the priority that the different frequency/different system is set is higher than the priority of current place, terminal frequency range/system; The thresholding that different frequency/different system signal quality perhaps is set is lower than the thresholding of current place, terminal frequency range/system signal quality; Sub-district side-play amount/sluggishness that the different frequency/different system perhaps is set is lower than the sub-district side-play amount/sluggishness of current place, terminal frequency range/system.The immigration rank that cell reselection parameters is set to this different frequency/different system is not higher than the immigration rank of current place, terminal frequency range/system, and specifically comprise: the priority that the different frequency/different system is set is not higher than the priority of current place, terminal frequency range/system; The thresholding that different frequency/different system cell signal quality thresholding is not less than current place, terminal frequency range/system signal quality perhaps is set; Sub-district side-play amount/sluggishness that the different frequency/different system perhaps is set is not less than the sub-district side-play amount/sluggishness of current place, terminal frequency range/system.
In embodiments of the present invention, the above-mentioned mode that cell reselection parameters is set by the terminal in this locality can also be replaced by following mode:
The terminal receives the cell reselection parameters that is issued by network side; Perhaps the terminal receives the broadcast of carrying cell reselection parameters that is issued by network side; Perhaps the terminal receives the cell reselection parameters that is issued by dedicated signaling; Wherein, the cell reselection parameters that receives of terminal comprises: at least a in the side-play amount/sluggishness of the thresholding of frequency range and sub-district under the priority of frequency range, the sub-district under the sub-district.When issuing broadcast by system, further, system can also issue the alternative cell reselection parameters of many covers, and every suit cell reselection parameters all comprises; At least a in the side-play amount/sluggishness of the thresholding of frequency range and sub-district under the priority of frequency range, the sub-district under the sub-district.UE selects a corresponding cover cell reselection parameters as the case may be in these many cover cell reselection parameters, for example, when UE need be provided with higher immigration rank with respective cell, then select to move into that higher cover cell reselection parameters of rank, and vice versa.In addition, the above-mentioned dedicated signaling cell reselection parameters that can also issue to the UE present case directly supplies UE to use.
In the present embodiment, when the terminal received the cell reselection parameters that network side issues, the rank sub-district higher than the access rank of said macrocell can be selected to move in the terminal according to the cell reselection parameters of receiving from the neighbor cell of measuring.
Step 206: the grand immigration rank high sub-district of rank than current place, terminal selected to move into according to the cell reselection parameters that is provided with in the terminal in the neighbor cell of measuring.
Particularly, in the above-mentioned neighbor cell of measuring, select the highest frequency range of priority, in this frequency range, select the highest sub-district of signal quality value;
Perhaps select the minimum frequency range of thresholding, in this frequency range, select the highest sub-district of signal quality value;
Perhaps select the minimum sub-district of side-play amount/sluggishness.
Step 207: the terminal determines whether to be moved into selected sub-district according to the thresholding of selected sub-district.
Particularly, the terminal can judge whether the selected cell signal quality information that measures is not less than the thresholding of this selected sub-district, if, then be moved into this selected sub-district, otherwise, do not move into this selected sub-district, promptly the terminal continues to reside in the current macrocell.
After the terminal moves into selected sub-district, can receive the broadcast of this sub-district, carry various parameters in this broadcast, comprise cell reselection parameters, local relevant information of preserving can be upgraded according to the parameter in this broadcast in the terminal.After preventing the local cell reselection parameters of terminal updating, the information of terminal after according to this renewal initiates to be moved into the process of other sub-district again, and causes taking place ping-pong phenomenon (switch between different sub-districts continually at the terminal); Further, in the present embodiment, a delay time can also be preset in the terminal; After the terminal moves into selected sub-district, after this preset delay time arrives, upgrade local cell reselection parameters information of preserving according to this cell broadcast messages that receives again; Particularly; Can set delay time through timer, behind timer expiry, upgrade local information of preserving.
Illustrate the implementation process of embodiment 2 below:
Suppose that the terminal resides on the macrocell 1, macrocell 1 belongs to frequency range f1, and adjacent sub-district, the last terminal of f1 has: semi-open family expenses sub-district 11,12 and 13; Macrocell 2 and 3; Frequency range f2 goes up adjacent sub-district, terminal to be had: semi-open family expenses sub-district 21,22 and 23, macrocell 4 and 5.
When the signal quality variation of frequency range f1 under the macrocell at current place, terminal 1; Starting terminal is to the measurement of neighbor cell; When having measured with neighbor cell frequently (being the neighbor cell that f1 goes up the terminal); When the co-frequency cell of the satisfied district reselecting condition of presetting of discovery all is semi-open family expenses sub-district, continue adjacent different frequency/different system cell is measured (promptly measuring the signal quality that frequency range f2 goes up the sub-district).
If the last macrocell 4 or 5 of f2 is the sub-districts of satisfying above-mentioned district reselecting condition; Priority that then can frequency range f2 is set to higher than the priority of current frequency range f1; Or it is the thresholding of the current frequency range f1 of ratio of the threshold setting of frequency range f2 is low; Or the ratio macrocell 1 that the Qoffset/Qhyst of macrocell 4 or 5 is provided with is low, makes the terminal can switch to the macrocell 4 or 5 on the f2 more easily.
If the last macrocell 4 or 5 of f2 does not satisfy above-mentioned district reselecting condition; Or above-mentioned district reselecting condition is satisfied in semi-open family expenses sub-district 21,22 and 23; This moment is low or identical the priority of the ratio f1 that the priority of f2 is provided with; Or the thresholding of the current frequency range f1 of ratio of the threshold setting of frequency range f2 is high or identical, or, make the terminal can difficultly switch to the macrocell 4 or 5 on the f2 with ratio macrocell 1 height that the Qoffset/Qhyst of semi-open family expenses sub-district 21,22 and 23 is provided with.
In the present embodiment; The home base station cells of network side can pass through the Iu/S1 signaling; Iu/S1 is the interface of wireless access network and core net, obtains the type that the signatory attribute information at terminal comes distinguishing terminal, the type that also can come distinguishing terminal according to the terminal type information that prestores.Usually, the terminal type information that home base station cells prestores comprises two kinds of owner and guests, and for the terminal that does not appear in this terminal type information that prestores, home base station cells is identified as the passerby terminal with it.
Present embodiment is when measuring the different frequency/different system macrocell that satisfies the district reselecting condition; Non-CSG terminal can be moved into this different frequency/different system macrocell according to the cell reselection parameters that is provided with, thereby can reduce the descending interference of HNB sub-district to the non-CSG terminal in the macrocell; Disturb the downlink or uplink at HNB terminal at the non-CSG terminal that also can reduce in the macrocell, convenience is provided for operator's on-premise network.
Embodiment three
Referring to Fig. 3, the embodiment of the invention also provides a kind of method of cell reselection, and in the present embodiment, the terminal is the CSG terminal, and sub-district, current place is macrocell, and this method specifically comprises:
Step 301: the terminal receives the broadcast of this macrocell in the macrocell at current place, and according to preset measuring condition neighbor cell is measured, and obtains the signal quality information of neighbor cell.
Wherein, the process that neighbor cell is measured at the terminal is identical with the description among the embodiment 2, repeats no more here.
Step 302: when having the sub-district to be the CSG sub-district in the neighbor cell that measures,, in the CSG sub-district of measuring, confirm to satisfy pre-conditioned CSG sub-district according to the signal quality information of the neighbor cell of measuring.
Wherein, pre-conditionedly be: the signal quality information of sub-district is not less than preset signal quality thresholding, and this value is used as the foundation of screening CSG sub-district, is generally the network side setting.If the CSG cell signal quality information that measures is not less than this preset signal quality thresholding, show that the CSG cell signal quality that measures is stronger, the CSG sub-district that then can select this to measure; If the CSG cell signal quality information that measures is lower than this preset signal quality thresholding, show that the CSG cell signal that measures is second-rate, the CGS sub-district of then not selecting this to measure.According to this preset signal quality thresholding, one or more CGS sub-district can be selected in the terminal.The terminal obtains this preset signal quality thresholding; Multiple mode can be arranged; Include but not limited in the following several kinds of modes any: from the broadcast of sub-district, current place, terminal, read; The dedicated signaling that sends from network side, like the RRC release message, in read and from the information of SIM (client identity identification) the card preservation at terminal self, read.
Step 303: judge the CSG sub-district that whether has terminal unit contractual in the CSG sub-district of determining; Be specially in the present embodiment, obtain the sign of the CSG sub-district of determining, the sign with the signatory CSG sub-district of terminal self storage is identical to judge the sign obtain; If then carry out 304; Otherwise, carry out 306.
In the present embodiment, the sign of CSG sub-district is specially CSG ID.Particularly, the CSG ID of this sub-district can be read in the terminal from the broadcast of the CSG sub-district determined.
In the CSG terminal, all preserve the CSG ID (like white list) of signatory with it CSG sub-district usually, the terminal compares the CSG ID of the CSG ID that reads and self preservation, if consistent, representes that then this terminal is the contracting terminal of this CSG sub-district; Otherwise this terminal is not the contracting terminal of this CSG sub-district.
Step 304: whether the signal quality information of this signatory CSG sub-district of terminal judges is not less than the signal quality thresholding of this CGS sub-district, if then carry out 305; Otherwise, carry out 306.
All there is the signal quality thresholding of oneself each CSG sub-district; When this CSG cell signal quality information that measures when the terminal is not less than the signal quality thresholding of this CSG sub-district; The signal quality that shows this CSG sub-district is stronger; Then the terminal can move to this CSG sub-district, thereby alleviates in the stronger situation of the suffered interference of current macrocell; If this CSG cell signal quality information that the terminal measures is lower than the signal quality thresholding of this CSG sub-district, show that the signal quality of this CSG sub-district is relatively poor, then the terminal does not move to this CSG sub-district.The signal quality thresholding that the terminal obtains the CSG sub-district has multiple mode; Include but not limited in the following several kinds of modes any: read from the broadcast of this CSG sub-district at the terminal; Read from the broadcast of current persistent district at the terminal, and read from the path recorded information of preserving at the terminal.Wherein, Said path recorded information is meant the relevant information of the former sub-district of visiting of terminal records; Like sub-district ID, signal quality thresholding, cell reselection parameters or the like; When certain CSG sub-district was visited at the terminal in the past, can preserve the information of this CSG sub-district in this path recorded information, the terminal then can read the ID of this CSG sub-district from this path recorded information.If this CSG sub-district was not visited at the terminal in the past, broadcast that the broadcast that then terminal can be through reading current area maybe should signatory CSG sub-district is obtained the signal quality thresholding of this signatory CSG sub-district.
Step 305: the terminal moves into should signatory CSG sub-district.
Step 306: current macrocell is continued to reside in the terminal.
Further; After the terminal is confirmed and is moved into signatory CSG sub-district, receive the broadcast of this signatory sealing family expenses sub-district, can also be behind preset delay time; Upgrade local cell reselection parameters of preserving according to this broadcast, thereby avoid taking place ping-pong phenomenon.
The CSG sub-district of satisfying preset signal quality thresholding is measured at the CSG terminal earlier in this enforcement; Find the CSG sub-district of this CSG terminal unit contractual then therein, judge again whether the signal quality of its signatory CSG sub-district is not less than the signal quality thresholding of this sub-district, if; Then the terminal is moved in the signatory CSG sub-district; Thereby it is professional that the terminal can be enjoyed in signatory CSG sub-district, continues to reside in macrocell with the terminal and compare, and reduced the interference that the terminal receives.
Embodiment four
Referring to Fig. 4, the embodiment of the invention provides a kind of terminal, and this terminal comprises:
Wherein, measuring condition can be preset in this locality, also can obtain from other places, and the embodiment of the invention is not done concrete qualification.
Above-mentioned measurement module 401 specifically comprises:
The common frequency measurement unit is used for according to the common frequency measurement condition of obtaining, and measures and the neighbor cell of macrocell with frequency;
First recognition unit is used to discern the type of the homogeneous frequency adjacent area of measuring the common frequency measurement unit;
The different-frequency measure unit; Be used for when learning, in the homogeneous frequency adjacent area that the common frequency measurement unit is measured, when the sub-district of satisfying the district reselecting condition is semi-open family expenses sub-district according to first recognition unit; According to the different-frequency measure condition of obtaining, measure the alien frequencies neighbor cell of macrocell.
Wherein, the district reselecting condition can be preset in this locality, also can obtain from other places, and the embodiment of the invention is not done concrete qualification.
The above-mentioned module 402 that is provided with can specifically comprise:
Second recognition unit, the signal quality information of the neighbor cell that is used for measuring according to measurement module 401, the sub-district of in the neighbor cell of measuring, confirming to satisfy the district reselecting condition, and the cell type of district reselecting condition is satisfied in identification;
First is provided with the unit; Be used for when second recognition unit identifies the sub-district of satisfying the district reselecting condition and is different frequency/different system macrocell, the immigration that said cell reselection parameters is set to the different frequency/different system is superior to the immigration rank of current place, said terminal frequency range/system;
Second is provided with the unit; Be used for when second recognition unit identifies the sub-district of satisfying the district reselecting condition and is different frequency/different system semi-open family expenses sub-district, the immigration rank that said cell reselection parameters is set to the different frequency/different system is not higher than the immigration rank of current place, said terminal frequency range/system.
Further, above-mentioned first the combination that the unit can specifically comprise following norator unit or norator unit is set:
First priority is provided with subelement, and the priority that is used to be provided with said different frequency/different system is higher than the priority of current place, said terminal frequency range/system;
The first threshold setting subelement, the thresholding that is used to be provided with said different frequency/different system signal quality is lower than the thresholding of place, said terminal frequency range/system signal quality;
First side-play amount/sluggishness is provided with subelement, and the sub-district side-play amount/sluggishness that is used to be provided with said different frequency/different system is lower than the sub-district side-play amount/sluggishness of said terminal place frequency range/system.
Above-mentioned second is provided with the combination that the unit can specifically comprise following norator unit or norator unit:
Second priority is provided with subelement, and the priority that is used to be provided with said different frequency/different system is not higher than the priority of current place, said terminal frequency range/system;
The second threshold setting subelement, the thresholding that is used to be provided with said different frequency/different system signal quality is not less than the thresholding of place, said terminal frequency range/system signal quality;
Second side-play amount/sluggishness is provided with subelement, and the sub-district side-play amount/sluggishness that is used to be provided with said different frequency/different system is not less than the sub-district side-play amount/sluggishness of said terminal place frequency range/system.
Above-mentioned selection module 403 can specifically comprise following any unit or the combination of unit arbitrarily:
The priority selected cell is used in the neighbor cell that measurement module 401 is measured, selecting the highest frequency range of priority according to the cell reselection parameters that module 402 is provided with is set, and in this frequency range, selects the highest sub-district of signal quality value;
The thresholding selected cell is used in the sub-district that measurement module 401 is measured, selecting the minimum frequency range of thresholding according to the cell reselection parameters that module 402 is provided with is set, and in this frequency range, selects the highest sub-district of signal quality value;
Side-play amount/sluggish selected cell is used in the sub-district that measurement module 401 is measured, selecting the minimum sub-district of side-play amount/sluggishness according to the cell reselection parameters that module 402 is provided with is set.
Further, above-mentioned terminal can also comprise:
Determination module is used to determine whether to move into the sub-district of selecting module 403 to select;
Update module is used for after determination module confirms that immigration and terminal are moved into the sub-district of selection, receiving the broadcast of the sub-district of selecting, and behind preset delay time, upgrades the cell reselection parameters that preserve this locality according to broadcast.
Present embodiment is when measuring the different frequency/different system macrocell that satisfies the district reselecting condition; Non-CSG terminal can be moved into this different frequency/different system macrocell according to the cell reselection parameters that is provided with, thereby can reduce the descending interference of HNB sub-district to the non-CSG terminal in the macrocell; Disturb the downlink or uplink at HNB terminal at the non-CSG terminal that also can reduce in the macrocell, convenience is provided for operator's on-premise network.
Embodiment five
Referring to Fig. 5, corresponding with the method for cell reselection of the foregoing description three, present embodiment provides a kind of terminal, and this terminal comprises:
Measurement module 501 is used for the macrocell at current place, terminal, according to measuring condition neighbor cell is measured;
Determination module 502; It is sealing family expenses sub-districts that the neighbor cell that is used for measuring when measurement module 501 has the sub-district; And when above-mentioned terminal is the sealing home terminal; According to the signal quality information of the neighbor cell of measuring, in the sealing family expenses sub-district of measuring, confirm to satisfy pre-conditioned sealing family expenses sub-district;
Gravity treatment module 503 is used for judging whether sealing family expenses sub-district that determination module 502 is determined exists the sealing family expenses sub-district of terminal unit contractual, if then according to the signal quality thresholding of signatory sealing family expenses sub-district, determine whether to move into signatory sealing family expenses sub-district.
Wherein, measuring condition can be preset in this locality, also can obtain from other places, and the embodiment of the invention is not done concrete qualification.
Further, above-mentioned gravity treatment module 503 specifically comprises:
Judging unit is used to obtain the sign of the sealing family expenses sub-district of determining, and the sign with the signatory sealing family expenses sub-district of terminal storage is identical to judge the sign obtain;
The gravity treatment unit, be used for when the result of judgment unit judges when being, according to the signal quality thresholding of signatory sealing family expenses sub-district, determine whether to move into signatory sealing family expenses sub-district.
Further, above-mentioned terminal can also comprise:
Update module is used for after the terminal is confirmed and is moved into signatory sealing family expenses sub-district, receiving the broadcast of signatory sealing family expenses sub-district, behind preset delay time, upgrades local cell reselection parameters of preserving according to broadcast.
The CSG terminal is at first measured adjacent sub-district according to measuring condition through measurement module when carrying out district reselecting in this enforcement, then after finding the signatory sub-district at this CSG terminal; Judge again whether the signal quality of its signatory sub-district is not less than the signal quality thresholding of this sub-district; If then the terminal is moved in the signatory CSG sub-district, thereby it is professional that the terminal can be enjoyed in signatory CSG sub-district; Continue to reside in macrocell with the terminal and compare, reduced the interference that the terminal receives.
The embodiment of the invention can realize that corresponding software can store in the storage medium that can read through software, for example, and in the hard disk of computer, floppy disk or the CD.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (19)
1. a method of cell reselection is characterized in that, said method comprises:
The terminal is measured neighbor cell according to measuring condition in the macrocell at current place;
According to the signal quality information of the neighbor cell of measuring, the cell reselection parameters of the said neighbor cell of measuring is set;
From the said neighbor cell of measuring, select to move into the rank sub-district higher according to said cell reselection parameters than the immigration rank of said macrocell;
Wherein, said terminal is measured neighbor cell according to measuring condition in the macrocell at current place, specifically comprises:
According to the common frequency measurement condition of obtaining, measure and the neighbor cell of said macrocell with frequency;
The type of the homogeneous frequency adjacent area that identification is measured;
When the sub-district of satisfying the district reselecting condition in the said homogeneous frequency adjacent area of measuring is semi-open family expenses sub-district,, measure the alien frequencies neighbor cell of said macrocell according to the different-frequency measure condition of obtaining.
2. method of cell reselection according to claim 1; It is characterized in that; Said neighbor cell comprises: at least a in macrocell and the home base station cells, and said home base station cells comprises: at least a in open family expenses sub-district, semi-open family expenses sub-district and the sealing family expenses sub-district;
Said open family expenses sub-district allows all terminals to insert;
Said semi-open family expenses sub-district allows sealing home terminal and passerby terminal to insert; Said sealing home terminal is enjoyed professional priority and is higher than said passerby terminal in said semi-open family expenses sub-district, said sealing home terminal is than the said semi-open family expenses of preferential access sub-district, said passerby terminal.
3. method of cell reselection according to claim 2 is characterized in that, said passerby terminal can not be enjoyed professional in said semi-open family expenses sub-district or enjoyed limited business.
4. method of cell reselection according to claim 2; It is characterized in that, when said semi-open family expenses local resource is limited, preferential access into closed home terminal; And calculate by different weights based on terminal information; According to result calculated order from high to low sorted in the terminal, select the minimum terminal of ordering, the terminal that said ordering is minimum switches to other sub-districts; Or reduce the service rate at the minimum terminal of said ordering, or delete at least a business in the minimum terminal concurrence business of said ordering.
5. method of cell reselection according to claim 4; It is characterized in that; Said terminal information comprises: at least a in priority, service priority, class of business and the service rate of terminal in the sub-district, wherein the shared weight of the priority of terminal in the sub-district is the highest.
6. method of cell reselection according to claim 1 is characterized in that, the neighbor cell signal quality information that said basis is measured is provided with the cell reselection parameters of the said neighbor cell of measuring, and specifically comprises:
According to the signal quality information of the neighbor cell of measuring, in the neighbor cell of measuring, confirm to satisfy the sub-district of district reselecting condition, and the cell type of district reselecting condition is satisfied in identification;
If satisfy the neighbor cell of said district reselecting condition is different frequency/different system macrocell, and the immigration that then said cell reselection parameters is set to the different frequency/different system is superior to the immigration rank of current place, said terminal frequency range/system;
If satisfy the neighbor cell of said district reselecting condition is different frequency/different system semi-open family expenses sub-district, and the immigration rank that then said cell reselection parameters is set to the different frequency/different system is not higher than the immigration rank of current place, said terminal frequency range/system.
7. method of cell reselection according to claim 6 is characterized in that, the immigration that said cell reselection parameters is set to the different frequency/different system is superior to the immigration rank of current place, said terminal frequency range/system, specifically comprises:
The priority that said different frequency/different system is set is higher than the priority of current place, said terminal frequency range/system;
The thresholding that said different frequency/different system signal quality perhaps is set is lower than the thresholding of place, said terminal frequency range/system signal quality;
Sub-district side-play amount/sluggishness that said different frequency/different system perhaps is set is lower than the sub-district side-play amount/sluggishness of said terminal place frequency range/system.
8. method of cell reselection according to claim 6 is characterized in that, the immigration rank that said cell reselection parameters is set to the different frequency/different system is not higher than the immigration rank of current place, said terminal frequency range/system, specifically comprises:
The priority that said different frequency/different system is set is not higher than the priority of current place, said terminal frequency range/system;
The thresholding that said different frequency/different system signal quality perhaps is set is not less than the thresholding of place, said terminal frequency range/system signal quality;
Sub-district side-play amount/sluggishness that said different frequency/different system perhaps is set is not less than the sub-district side-play amount/sluggishness of said terminal place frequency range/system.
9. method of cell reselection according to claim 1 is characterized in that, the type of the homogeneous frequency adjacent area that said identification is measured specifically comprises:
Obtain homogeneous frequency adjacent area physical label or the type identification measured;
Through said homogeneous frequency adjacent area physical label or type identification, the homogeneous frequency adjacent area type that identification is measured.
10. method of cell reselection according to claim 9 is characterized in that, said through said homogeneous frequency adjacent area physical label or type identification, the homogeneous frequency adjacent area type that identification is measured is specially:
Reserve section and the sub-district physical label that obtains, the homogeneous frequency adjacent area type that identification is measured according to the homogeneous frequency adjacent area physical label.
11. method of cell reselection according to claim 9 is characterized in that, the said type identification that obtains the homogeneous frequency adjacent area of measuring is specially:
From broadcast channel message, obtain, perhaps obtain through the Iur/X2 interface.
12. method of cell reselection according to claim 9; It is characterized in that; When the homogeneous frequency adjacent area type that identifies is semi-open family expenses sub-district, read the sign of the closed signed user group of carrying in the message from broadcast channel, the sign of the sign of the closed signed user group that reads and the signatory closed signed user group of self preserving is compared; If consistent, then confirm it self is the contracting terminal of the said sub-district of identifying; Otherwise, confirm it self is not the contracting terminal of the said sub-district of identifying.
13. method of cell reselection according to claim 1 is characterized in that, said method further comprises:
After confirming and being moved into the sub-district of said selection, receive the broadcast of the sub-district of said selection;
Behind preset delay time, upgrade local cell reselection parameters of preserving according to said broadcast.
14. method of cell reselection according to claim 1 is characterized in that, said method also comprises:
Receive the cell reselection parameters that network side issues through broadcast, perhaps, receive the cell reselection parameters that network side issues through dedicated signaling;
From the said neighbor cell of measuring, select to move into the rank sub-district higher according to the cell reselection parameters of receiving than the immigration rank of said macrocell.
15. a terminal is characterized in that, said terminal comprises:
Measurement module is used for neighbor cell being measured according to measuring condition at the macrocell at current place;
Module is set, and the signal quality information of the neighbor cell that is used for measuring according to said measurement module is provided with the cell reselection parameters of the said neighbor cell of measuring;
Select module, be used for the cell reselection parameters that module is provided with being set, from the neighbor cell that said measurement module is measured, select to move into the immigration rank high sub-district of rank than place, said terminal macrocell according to said;
Wherein, said measurement module comprises:
The common frequency measurement unit is used for according to the common frequency measurement condition of obtaining, and measures and the neighbor cell of said macrocell with frequency;
First recognition unit is used to discern the type of the homogeneous frequency adjacent area of measuring said common frequency measurement unit;
The different-frequency measure unit; Be used for when learning, in the homogeneous frequency adjacent area that said common frequency measurement unit is measured, when the sub-district of satisfying the district reselecting condition is semi-open family expenses sub-district according to said first recognition unit; According to the different-frequency measure condition of obtaining, measure the alien frequencies neighbor cell of said macrocell.
16. terminal according to claim 15 is characterized in that, the said module that is provided with specifically comprises:
Second recognition unit is used for the neighbor cell signal quality information measured according to said measurement module, the sub-district of in the neighbor cell of measuring, confirming to satisfy the district reselecting condition, and the cell type of said district reselecting condition is satisfied in identification;
First is provided with the unit; Be used for when said second recognition unit identifies the sub-district of satisfying said district reselecting condition and is different frequency/different system macrocell, the immigration that said cell reselection parameters is set to the different frequency/different system is superior to the immigration rank of current place, said terminal frequency range/system;
Second is provided with the unit; Be used for when said second recognition unit identifies the sub-district of satisfying said district reselecting condition and is different frequency/different system semi-open family expenses sub-district, the immigration that said cell reselection parameters is set to the different frequency/different system is superior to the immigration rank of current place, said terminal frequency range/system.
17. terminal according to claim 16 is characterized in that, said first is provided with the combination that the unit specifically comprises following norator unit or norator unit:
First priority is provided with subelement, and the priority that is used to be provided with said different frequency/different system is higher than the priority of current place, said terminal frequency range/system;
The first threshold setting subelement, the thresholding that is used to be provided with said different frequency/different system signal quality is lower than the thresholding of place, said terminal frequency range/system signal quality;
First side-play amount/sluggishness is provided with subelement, and the sub-district side-play amount/sluggishness that is used to be provided with said different frequency/different system is lower than the sub-district side-play amount/sluggishness of said terminal place frequency range/system.
18. terminal according to claim 16 is characterized in that, said second is provided with the combination that the unit specifically comprises following norator unit or norator unit:
Second priority is provided with subelement, and the priority that is used to be provided with said different frequency/different system is not higher than the priority of current place, said terminal frequency range/system;
The second threshold setting subelement, the thresholding that is used to be provided with said different frequency/different system signal quality is not less than the thresholding of place, said terminal frequency range/system signal quality;
Second side-play amount/sluggishness is provided with subelement, and the sub-district side-play amount/sluggishness that is used to be provided with said different frequency/different system is not less than the sub-district side-play amount/sluggishness of said terminal place frequency range/system.
19. terminal according to claim 15 is characterized in that, said terminal also comprises:
Determination module is used to determine whether to move into the sub-district that said selection module is selected;
Update module; Be used for after said determination module confirms that immigration and said terminal are moved into the sub-district of said selection; Receive the broadcast of the sub-district of said selection, behind preset delay time, upgrade local cell reselection parameters of preserving according to said broadcast.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101339248A CN101651961B (en) | 2008-08-11 | 2009-04-10 | Method and terminal for reselecting cell |
| PCT/CN2009/073187 WO2010017761A1 (en) | 2008-08-11 | 2009-08-11 | Method and terminal for cell reselection |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810210236.2 | 2008-08-11 | ||
| CN200810210236 | 2008-08-11 | ||
| CN2009101339248A CN101651961B (en) | 2008-08-11 | 2009-04-10 | Method and terminal for reselecting cell |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210181388.0A Division CN102711195B (en) | 2008-08-11 | 2009-04-10 | Cell reselection method and terminal |
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| CN101651961A CN101651961A (en) | 2010-02-17 |
| CN101651961B true CN101651961B (en) | 2012-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101339248A Active CN101651961B (en) | 2008-08-11 | 2009-04-10 | Method and terminal for reselecting cell |
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| CN (1) | CN101651961B (en) |
| WO (1) | WO2010017761A1 (en) |
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| WO1999003290A1 (en) * | 1997-07-11 | 1999-01-21 | Nortel Networks Corporation | Method and apparatus for switching between public macrocellular telephone system and private microcellular telephone system |
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| CN100486354C (en) * | 2005-10-08 | 2009-05-06 | 华为技术有限公司 | Method for service allocation in layered network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO1999003290A1 (en) * | 1997-07-11 | 1999-01-21 | Nortel Networks Corporation | Method and apparatus for switching between public macrocellular telephone system and private microcellular telephone system |
| WO2001026405A1 (en) * | 1999-10-04 | 2001-04-12 | Motorola Inc. | Method to reduce handovers in mobile radio systems |
| CN1426184A (en) * | 2001-12-11 | 2003-06-25 | 深圳市中兴通讯股份有限公司上海第二研究所 | Decision method for periodic report and channel interval hard switching |
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