CN101222759B - Subdistrict re-selection method, system and terminal in mobile communications network - Google Patents
Subdistrict re-selection method, system and terminal in mobile communications network Download PDFInfo
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- CN101222759B CN101222759B CN2007101356193A CN200710135619A CN101222759B CN 101222759 B CN101222759 B CN 101222759B CN 2007101356193 A CN2007101356193 A CN 2007101356193A CN 200710135619 A CN200710135619 A CN 200710135619A CN 101222759 B CN101222759 B CN 101222759B
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Abstract
The invention relates to the mobile communication field and discloses a cell reselection method, a system and a terminal in a mobile communication network for balancing load between cells. In the invention, according to the grades of terminal users with different sorts, different reselected parameter sets are selected for cell reselection in order that terminals with different sorts reselected to the same cell have different probabilities. When the reselected parameter sets are calculated, the factor of cell bandwidth can be added to increase the probability for the terminal to access the cell which matches bandwidth with the terminal bandwidth, thereby making the best of the bandwidth resource of the terminal and the cell. The reselected parameter sets are calculated only according to the load and the cell bandwidth of a servicing cell or the load and the cell bandwidth of the servicing cell and the adjacent cell. The reselected parameter sets can be calculated by the network side; the reselected parameter sets aiming at different terminal user grades are broadcast in the cell; the corresponding reselected parameter set is selected by the terminal according to the own user grade.
Description
Technical field
The present invention relates to moving communicating field, particularly cell reselection technique.
Background technology
In all cellular mobile communication technologies; Switch and district reselecting all is and important part; Specifically; When user terminal leaves sub-district and gets into the another one sub-district, the signal of the original sub-district that this terminal is received inevitable more and more a little less than, and its received signal that gets into the sub-district will be more and more stronger just also.In order to keep the terminal to receive quality of signals, must this terminal be transformed into the stronger base station of signal of new entering by original base station.For the terminal of connected state, the conversion between this base station is called switching, and for the terminal of Idle state, the change of terminal persistent district is accomplished through cell reselection process, need Target cell be detected, and in satisfactory sub-district, carries out district reselecting.
In GSM; The terminal is measured the signal quality of different districts; And the semaphore threshold value in signal quality that measures and the system information compared, if the signal quality that records reaches reselection within a certain period of time continuously, then the terminal gravity treatment is to this sub-district.Meeting triggering cell gravity treatment when moving to another sub-district except the terminal by a sub-district, sometimes, network side also can the triggering cell gravity treatment from the purpose of load balance.
Specifically, when district reselecting is carried out at the terminal, need to measure the signal level or the signal quality of this sub-district and neighbor cell, then measured value is mapped as district reselecting assessed value Rs and Rn, decide preferred sub-district through the size that compares Rs, Rn.The Rs here, Rn can be class values, and mapping method is determined by system, and is broadcast to the terminal through system message.
For fear of the unbalanced situation of cell load occurring; Be some cell load amount bigger (the residual negative carrying capacity is smaller comparatively speaking) but the number of terminals of resident idle condition is many, and other cell load amount smaller (the residual negative carrying capacity is bigger comparatively speaking) but do not have resident or resident less in the terminal of idle condition.Under the unbalanced situation of cell load, in more sub-district, the smaller but resident terminal of residual negative carrying capacity, when these resident terminal originating service, possibly cause quality of service to descend, even cause existing service disconnection; And the wasting of resources is caused in the bigger sub-district of residual negative carrying capacity owing to number of terminals is less.Occur for fear of above-mentioned situation, when carrying out district reselecting at the terminal, network side need carry out macro-control to it; If above-mentioned situation has taken place, can let the terminal reside in the bigger sub-district of residual negative carrying capacity through district reselecting.
Network side to the general process of the distribution control of terminal between neighbor cell of idle condition is: network side carries out load measure to the sub-district; According to load measurement results; Load-factor is considered in the cell reselection parameters; And be handed down to all terminals in the sub-district through system message broadcasting, and district reselecting is carried out according to cell reselection parameters in the terminal, thus the equilibrium of accomplishing potential load distributes.
Specifically load-factor is considered that the mode in the cell reselection parameters is: network side setting " grade of load division Upper threshold " and " grade of load division Lower Threshold ", and three parameters such as " grade of load are divided sluggish ".When adding " grade of load is divided sluggish " when the load of system is higher than " grade of load division Upper threshold "; Think that the system load grade is " height "; When deducting " grade of load is divided sluggish ", think that the grade of load of this sub-district is " gently " when the load of system is lower than " grade of load division Lower Threshold ".Network side is according to the residing grade of load in sub-district; To cell selecting and the reselecting parameters that issues in the system message; Comprise grade of load biasing Qoffset1 and Qoffset2; And the alien-frequency district gravity treatment starts thresholding Sintersearch and carries out correspondence adjustment, adjusted cell selecting and reselecting parameters are handed down to terminals all in the sub-district, thereby control terminal can be selected the less relatively sub-district of load capacity in cell selecting and reuse adoption process.
In the prior art,, therefore in existing cell reselection process, need not to consider similar bandwidth considerations because the bandwidth ability that network and terminal are supported is fixed.But; Continuous development along with communication network; The bandwidth ability at communication system and terminal all has expansion in various degree; Network needs the terminal of compatible existing bandwidth ability simultaneously, and the terminal of expansion back bandwidth ability, so just the situation that same system supports the terminal of various bandwidth ability simultaneously possibly occur.Terminal with different bandwidth capabilities is after getting into connected state; Maybe be different for the loading level that bring the sub-district; Carry out district reselecting according to network load condition simply and can bring the unbalanced situation of minizone load equally, and the gradual network system in incompatible future.
Summary of the invention
The technical problem underlying that each execution mode of the present invention will solve provides residence reselecting, system and terminal in a kind of mobile communications network, makes the minizone load more balanced.
For solving the problems of the technologies described above, execution mode of the present invention provides residence reselecting in a kind of mobile communications network, comprises following steps:
The terminal obtains corresponding reselecting parameters collection according to the user gradation of self;
District reselecting is carried out according to the reselecting parameters collection in the terminal.
Execution mode of the present invention also provides district reselecting system in a kind of mobile communications network, and end side comprises: the unit that obtains corresponding reselecting parameters collection according to the user gradation at this terminal; With the unit that carries out district reselecting according to this reselecting parameters collection.
Execution mode of the present invention also provides a kind of terminal, comprises:
Obtain the unit of corresponding reselecting parameters collection according to the user gradation at this terminal; With
Carry out the unit of district reselecting according to this reselecting parameters collection.
Execution mode of the present invention also provides residence reselecting in a kind of mobile communications network, comprises following steps:
The terminal obtains corresponding reselecting parameters collection according to the bandwidth ability of self;
District reselecting is carried out according to the reselecting parameters collection in the terminal.
Execution mode of the present invention also provides district reselecting system in a kind of mobile communications network, and end side comprises: the unit that obtains corresponding reselecting parameters collection according to the bandwidth ability at this terminal; With the unit that carries out district reselecting according to this reselecting parameters collection.
Execution mode of the present invention also provides a kind of terminal, comprises:
Obtain the unit of corresponding reselecting parameters collection according to the bandwidth ability at this terminal; With
Carry out the unit of district reselecting according to this reselecting parameters collection.
Each execution mode of the present invention compared with prior art, the main distinction and effect thereof are:
Select different reselecting parameters collection to carry out district reselecting according to the user gradation at different classes of terminal.User gradation can be formulated by user signing contract information, terminal bandwidth and other abilities, operator policy information etc. are comprehensive, also can be by a formulation wherein.Have the ability to initiate to take the business than heavy load such as the bigger terminal of bandwidth ability, say from the statistical significance, it is higher that the business of its initiation takies the desired value of load.Different reselecting parameters collection has been represented different gravity treatment probability in fact.In the bandwidth ability that has a kind of terminal at least during less than the bandwidth ability of sub-district; If when gravity treatment, consider the influence of terminal bandwidth ability; Can be through the setting of reselecting parameters collection; Hour improve the gravity treatment probability at the bigger terminal of bandwidth ability at cell load, when cell load is big, reduce the gravity treatment probability at the bigger terminal of bandwidth ability, thereby make the load in the future of each minizone more balanced.
The factor that can add bandwidth of cell when calculating the reselecting parameters collection increases the probability of terminal gravity treatment to the sub-district of comparatively mating with its bandwidth, thereby makes full use of the bandwidth resources of terminal and sub-district.For the terminal bandwidth ability less than the bandwidth of cell ability; Can take all factors into consideration the relative scale of cell load, terminal bandwidth ability and bandwidth of cell ability; Be the different reselecting parameters collection of terminal generation of different bandwidth capabilities, thereby make the load in the future of each minizone more balanced.
When calculating the reselecting parameters collection, can be only according to the load and the bandwidth of cell of Serving cell, also can be according to the load and the bandwidth of cell of Serving cell and adjacent area thereof.Through relevant information with reference to the adjacent area, can make the calculating of reselecting parameters collection more reasonable, satisfy the needs of minizone load balancing better.
Can carry out the calculating of reselecting parameters collection by network side, and will in the sub-district, broadcast, select corresponding reselecting parameters collection according to the user gradation of self by the terminal to the reselecting parameters collection of different user gradations.The burden at this mode terminal is less, thereby practices thrift the electric energy at terminal.
Also can issue the load and the bandwidth information of sub-district by network side, calculate the reselecting parameters collection voluntarily according to self user gradation by the terminal.The burden of this mode network side is less.
Load information can represent with the grade of load simply, rather than concrete form more, so both can satisfy the requirement of district reselecting, can reduce the amount of information of expression load information again effectively.
Network side can also be according to the user gradation at terminal, and the reselecting parameters collection of the various grades of load of correspondence is kept in this terminal; Perhaps network side is broadcasted various user gradations and the pairing reselecting parameters collection of the various grade of load, and the terminal receives and preserves pairing each the reselecting parameters collection of self user gradation, and preserves the corresponding relation of these reselecting parameters collection and the various grades of load.Concentrate the reselecting parameters collection of selecting this grade of load corresponding according to the grade of load of current area from each reselecting parameters of having preserved by the terminal.Network side only needs the grade of load of periodic broadcast sub-district to get final product like this, has practiced thrift the resource of network side broadcast channel greatly.
Description of drawings
Fig. 1 is according to residence reselecting flow chart in the mobile communications network of first embodiment of the invention;
Fig. 2 is according to residence reselecting flow chart in the mobile communications network of second embodiment of the invention;
Fig. 3 is according to residence reselecting flow chart in the mobile communications network of third embodiment of the invention;
Fig. 4 is the load information sketch map according to each sub-district of example 1 in the residence reselecting in the mobile communications network of third embodiment of the invention;
Fig. 5 is the district reselecting sketch map according to example 1 in the residence reselecting in the mobile communications network of third embodiment of the invention;
Fig. 6 is the load information sketch map according to each sub-district of example 2 in the residence reselecting in the mobile communications network of third embodiment of the invention;
Fig. 7 is the district reselecting sketch map according to example 2 in the residence reselecting in the mobile communications network of third embodiment of the invention;
Fig. 8 is according to residence reselecting flow chart in the mobile communications network of four embodiment of the invention;
Fig. 9 is according to residence reselecting flow chart in the mobile communications network of fifth embodiment of the invention.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that the present invention is done to describe in detail further below.
In each execution mode of the present invention, district reselecting is carried out according to different reselecting parameters collection in the terminal of different user grade.This user gradation can be formulated by user signing contract information, terminal capability (wherein comprising terminal bandwidth ability, security capabilities, access capability etc.), operator policy information etc. are comprehensive, also can be a formulation by wherein.Different reselecting parameters collection has been represented different gravity treatment probability in fact.
Only considering in the user gradation that the terminal bandwidth ability is an example, it is higher that the business than heavy load owing to have the ability to initiate to take in the bigger terminal of bandwidth ability, the business of its initiation take the desired value of load.Resident for fear of the bigger terminal of bandwidth ability to same sub-district, initiate business in same sub-district, for bringing excessive load in this sub-district, just need to consider of the influence of terminal bandwidth ability when carrying out district reselecting to sub-district load in the future at the terminal.
First embodiment of the invention relates to residence reselecting in a kind of mobile communications network.In this execution mode, the bandwidth ability of different sub-districts can be different, and the bandwidth ability at each terminal also can be different in the network.User gradation in this execution mode is represented that by the terminal bandwidth ability network side provides different reselecting parameters collection according to the different terminal bandwidth ability, and sacrificial vessel uses when having the terminal of corresponding bandwidth ability to carry out district reselecting.As shown in Figure 1.
In step 110; Network side (being generally the affiliated base station of Serving cell) only generates the reselecting parameters collection of each terminal bandwidth ability of correspondence respectively according to the load information and the different terminal bandwidth ability of Serving cell, and the reselecting parameters that is generated is concentrated and comprised the gravity treatment offset parameter.Wherein, The load information of Serving cell mainly comprises the grade of load, the sluggish parameter of load etc., and network side can be confirmed the grade of load of Serving cell according to the parameters such as transmitting power, user's average throughput, throughput of system and/or maximum access customer number of sub-district.Network side specifically is divided into several grades of load and can be according to circumstances set by operator.
Such as according to the difference of bandwidth ability, current terminal mainly is divided into terminal with 20MHz bandwidth and greater than the terminal of 20MHz bandwidth.Be that network side was confirmed the grade of load of sub-district A when the terminal generated the reselecting parameters collection among the A of sub-district according to transmitting power, user's average throughput, throughput of system and the maximum access customer number of sub-district A.And, generating corresponding reselecting parameters collection respectively for the terminal of 20MHz bandwidth with greater than the terminal of 20MHz bandwidth according to the determined grade of load, the parameter that this reselecting parameters is concentrated can comprise offset parameter Qoffset1, Qoffset2 and/or Sintercell etc.Different reselecting parameters collection has been represented different gravity treatment probability in fact; Through different reselecting parameters collection being set for the terminal of different bandwidth capabilities; Make at cell load than hour gravity treatment probability at the terminal that the raising bandwidth ability is bigger; When cell load is big, reduce the gravity treatment probability at the bigger terminal of bandwidth ability, thereby make the load in the future of each minizone more balanced.
Then get into step 120, network equipment, like the base station under the A of this sub-district, the reselecting parameters collection of these corresponding different terminals bandwidth ability of broadcasting in system message.
Then get into step 130, when district reselecting need be carried out in the terminal among the A of sub-district, select corresponding reselecting parameters collection, carry out district reselecting according to the reselecting parameters collection of selecting according to the bandwidth ability of self.Specifically carrying out the mode of district reselecting according to the reselecting parameters collection can be with reference to existing cell reselection technique.Because the restriction of reselecting parameters collection; If the bandwidth ability at this terminal is bigger, promptly might initiate to take business, then when district reselecting than heavy load; Only possibly select the less sub-district of cell load; Even this terminal initiates to take the business than heavy load in the future, can not make the sub-district to bear yet, can not influence the communication quality of sub-district; If the bandwidth ability at this terminal is less; Promptly only possibly initiate to take the business of less load; Then when district reselecting, not necessarily only select the less sub-district of cell load, also possibly select the big slightly sub-district of cell load; Even thereby business is initiated at this terminal in the future, can not bring too big influence to the load of sub-district yet.Thereby make the load in the future of each minizone more balanced, reduce the resident possibility of a large amount of non-occupied terminals to the bigger sub-district of current residual load capacity.
In addition; In this execution mode; If it is resident to the bigger sub-district of current residual load capacity that a large amount of non-occupied terminals take place, and initiate business respectively, cause influencing the situation of cut-in quality; Then, avoid causing the decline even the service disconnection of existing quality of service for this sub-district increases the RACH access-in resource.
Need to prove that mainly with terminal bandwidth ability representative of consumer grade, network side generates different reselecting parameters collection according to the different terminal bandwidth ability in this execution mode, sacrificial vessel uses when having the terminal of corresponding bandwidth ability to carry out district reselecting.And in practical application; This user gradation also can be to be confirmed by one of user signing contract information, terminal bandwidth ability, operator policy information or its combination in any; Network side provides different reselecting parameters collection according to the comprehensive user capability of confirming, the terminal selects corresponding reselecting parameters collection to carry out the sub-district again according to its user gradation.
Second embodiment of the invention relates to residence reselecting in a kind of mobile communications network equally; Be with the difference of first execution mode; In the first embodiment; Generate corresponding multiple reselecting parameters collection by network side according to user gradation (one of cell load information, different terminal bandwidth ability and user signing contract information that is gone out by carrier policy or its combination in any are confirmed), the terminal is directly concentrated from each reselecting parameters that generates according to the user gradation of self and is selected; And in this execution mode, network side is broadcasted the bandwidth and the load information of Serving cell in Serving cell, needs bandwidth and the load information of the terminal of district reselecting according to broadcasting, in conjunction with the user gradation of self, calculates the reselecting parameters collection.Before the burden at a kind of mode terminal less, can practice thrift the electric energy at terminal; A kind of mode network side burden in back is less.
With terminal bandwidth ability representative of consumer grade, specify below.As shown in Figure 2, in step 210, broadcast the bandwidth and the load information of this Serving cell the base station under the Serving cell in Serving cell.In order to reduce the update frequency of load information, this load information is represented through the grade of load equally.The base station can be confirmed the grade of load of Serving cell according to the parameters such as transmitting power, user's average throughput, throughput of system and/or maximum access customer number of sub-district.The concrete definition of the grade of load and division can be defined by operator flexibly.
Then get into step 220; The Idle state terminal that need carry out district reselecting is according to Serving cell bandwidth in the broadcast message and load information (can comprise the grade of load, residue load etc.); In conjunction with the bandwidth ability at terminal itself, calculate suitable reselecting parameters collection.Because the reselecting parameters collection is calculated by the terminal voluntarily, has reduced the burden of network side.And owing to add the factor of bandwidth of cell when calculating the reselecting parameters collection, increased the probability of terminal gravity treatment, thereby made full use of the bandwidth resources of terminal and sub-district to the sub-district of comparatively mating with its bandwidth.
Then get into step 230, district reselecting is carried out according to this reselecting parameters collection in the terminal.
Equally; In this execution mode; If it is resident to the bigger sub-district of current residual load capacity that a large amount of non-occupied terminals take place, and initiate business respectively, cause influencing the situation of cut-in quality; Then, avoid causing the decline even the service disconnection of existing quality of service for this sub-district increases the RACH access-in resource.
Need to prove, be to use terminal bandwidth ability representative of consumer grade in this execution mode, the terminal in conjunction with the bandwidth of cell and the load information of broadcasting, calculates corresponding reselecting parameters directly according to its bandwidth ability.And in practical application; This user gradation also can be come comprehensive definite by one of user signing contract information, terminal bandwidth ability, operator policy information or its combination in any; The terminal is according to the comprehensive user gradation of confirming; In conjunction with the bandwidth of cell and the load information of broadcasting, calculate corresponding reselecting parameters, carry out district reselecting according to this reselecting parameters.
Third embodiment of the invention relates to residence reselecting in a kind of mobile communications network equally; Roughly the same with second execution mode; Its difference is that in second execution mode, network side is only broadcasted the bandwidth and the load information of Serving cell in Serving cell; And in this execution mode, network side is broadcasted the bandwidth and the load information of Serving cell and adjacent area thereof together in Serving cell.Equally, represent user capability through the terminal bandwidth ability in this execution mode.
As shown in Figure 3, in step 310, under this Serving cell the base station obtain Serving cell with and the bandwidth and the load information of neighbor cell.For the neighbor cell that belongs to same base station, this base station can obtain the bandwidth and the load information of neighbor cell through measuring the signal of neighbor cell; For the neighbor cell that belongs to different base station, this base station can through with the information interaction of adjacent base station, obtain the bandwidth and the load information (as obtaining) of neighbor cell through X2 interface between the evolution base station or inter-cell RRM.Load information wherein mainly comprises the grade of load, the sluggish parameter of load etc., and the base station can be confirmed the grade of load of Serving cell and neighbor cell according to the parameters such as transmitting power, user's average throughput, throughput of system and/or maximum access customer number of sub-district.The concrete definition of the grade of load and division can be defined by operator flexibly.
Then get into step 320, broadcast the bandwidth and the load information of Serving cell and adjacent area thereof together this base station in Serving cell.
Then get into step 330; Need carry out the Idle state terminal of district reselecting according to load information of Serving cell in the broadcast message and neighbor cell (comprising the grade of load, residue load etc.) and bandwidth ability, calculate suitable reselecting parameters collection in conjunction with the bandwidth ability at terminal itself.Because the reselecting parameters collection is calculated by the terminal voluntarily, has reduced the burden of network side.And since when calculating the reselecting parameters collection also with reference to the load and the bandwidth of cell of Serving cell and adjacent area thereof, through relevant information, can make the calculating of reselecting parameters collection more reasonable with reference to the adjacent area, satisfy the needs of minizone load balancing better.
Then get into step 340, district reselecting is carried out according to this reselecting parameters collection in the terminal.
For example; Existing bandwidth ability is that the UE1 of 20MHz resides among the sub-district A of evolution base station 1; The bandwidth ability of sub-district A is 20MHz, and its neighbor cell has sub-district B and the sub-district C that belongs to another evolution base station 2, and the bandwidth ability of neighbor cell B is 10MHz; The bandwidth ability of neighbor cell C is 5MHz, and the load information of each sub-district is seen Fig. 4.Serving cell A obtains load information, the bandwidth of cell of neighbor cell B and sub-district C through the X2 interface between evolution base station 1 and the evolution base station 2, and (sub-district B bandwidth is 10MHz; Sub-district C bandwidth is 5MHz) etc.; And according to the definite grade of load separately of the load information of Serving cell and neighbor cell; Ratio such as according to sub-district residue load and bandwidth of cell ability is divided into the grade of load 1 to the grade of load 10 (corresponding ratio 0.1-1); Can think the grade of load less than 3 o'clock cell-overload, concrete grade of load setting and use can be provided with by operator flexibly.The bandwidth and the load information (can comprise the grade of load, residue load etc.) of Serving cell and neighbor cell are broadcasted in this Serving cell.UE1 is according to load information (comprising the grade of load, residue load etc.) and the bandwidth ability of sub-district A, B, C in the broadcast message; Bandwidth ability in conjunction with terminal itself calculates suitable reselecting parameters collection; Carry out district reselecting according to this reselecting parameters collection; When sub-district B and sub-district C signal strength signal intensity all during the according with reselection criterion; The sub-district and residue load big sub-district of bandwidth ability smaller or equal to the bandwidth ability of UE1 paid the utmost attention in the bandwidth ability of comprehensive judgement sub-district B and sub-district C and both residue loads.Because the bandwidth ability of sub-district B and sub-district C is all less than the bandwidth ability of UE1, thereby continue to judge both residue load, because the residue load of sub-district B is greater than sub-district C, so the UE1 gravity treatment arrives sub-district B, and is as shown in Figure 5.
Again such as; Existing bandwidth ability is that the UE1 of 20MHz resides in the sub-district C under evolution base station 1 linchpin; The bandwidth ability of sub-district C is 5MHz, and its neighbor cell has sub-district A and the sub-district B that belongs to another evolution base station 2, and the bandwidth ability of neighbor cell A is 25MHz; The bandwidth ability of neighbor cell B is 15MHz, and the load information of each sub-district is seen Fig. 6.Serving cell C obtains load information, bandwidth of cell (sub-district A bandwidth is 25MHz, and sub-district B bandwidth is 15MHz) of neighbor cell A and sub-district B etc. through the X2 interface between evolution base station 1 and the evolution base station 2; And, the bandwidth and the load information (can comprise the grade of load, residue load etc.) of Serving cell and neighbor cell are broadcasted in this Serving cell according to the definite grade of load separately of the load information of Serving cell and neighbor cell.UE1 is according to the load information of sub-district A, B, C in the broadcast message (comprising the grade of load, residue load etc.) and bandwidth ability, calculates suitable reselecting parameters collection in conjunction with the bandwidth ability at terminal itself, carries out district reselecting.When sub-district A and sub-district B signal strength signal intensity all during the according with reselection criterion, comprehensively judge the bandwidth ability of sub-district A and sub-district B and both residue loads, pay the utmost attention to the sub-district and residue load big sub-district of bandwidth ability smaller or equal to the bandwidth ability of UE1.Because the bandwidth ability of sub-district A is greater than the bandwidth ability of UE1, the bandwidth ability of sub-district B equals the UE1 bandwidth ability, and the load of sub-district A residue is 3, and the load of sub-district B residue is 2.5, takes all factors into consideration, and gravity treatment is to sub-district B.As shown in Figure 7.
In addition; In this execution mode; If it is resident to the bigger sub-district of current residual load capacity that a large amount of non-occupied terminals take place, and initiate business respectively, cause influencing the situation of cut-in quality; Then, avoid causing the decline even the service disconnection of existing quality of service for this sub-district increases the RACH access-in resource.
Equally, be to use terminal bandwidth ability representative of consumer grade in this execution mode, the terminal in conjunction with this sub-district and the neighbor cell bandwidth and the load information of broadcasting, calculates corresponding reselecting parameters directly according to its bandwidth ability.And in practical application; This user gradation also can be come comprehensive definite by one of user signing contract information, terminal bandwidth ability, operator policy information or its combination in any; The terminal is according to the comprehensive user gradation of confirming; In conjunction with this sub-district of broadcasting and the bandwidth and the load information of neighbor cell, calculate corresponding reselecting parameters, carry out district reselecting according to this reselecting parameters.
Four embodiment of the invention relates to residence reselecting in a kind of mobile communications network equally; Roughly the same with first execution mode; Its difference is; In the first embodiment, network side only generates corresponding multiple reselecting parameters collection according to the load information and the different terminal bandwidth ability of Serving cell; And in this execution mode, except that the load information and different terminal bandwidth ability of service sub-district, network side also generates and the corresponding reselecting parameters collection of terminal bandwidth ability according to the load information of neighbor cell.
As shown in Figure 8, in step 810, the base station under the Serving cell obtain Serving cell with and the bandwidth and the load information of neighbor cell.For the neighbor cell that belongs to same base station, this base station can obtain the bandwidth and the load information of neighbor cell through measuring the signal of neighbor cell; For the neighbor cell that belongs to different base station, this base station can through with the information interaction of adjacent base station, obtain the bandwidth and the load information of neighbor cell.Load information wherein comprises the grade of load, the sluggish parameter of load etc., and the base station can be confirmed the grade of load of sub-district according to the parameters such as transmitting power, user's average throughput, throughput of system and/or maximum access customer number of sub-district.The sub-district specifically is divided into several grades of load and can be set according to actual conditions by operator.
Then get into step 820; This base station generates the reselecting parameters collection of each terminal bandwidth ability of correspondence respectively according to the load information and the different terminal bandwidth ability of this Serving cell and neighbor cell thereof; The corresponding concentrated parameter type that comprises of reselecting parameters of different terminals bandwidth ability can be different with number; Reselecting parameters is concentrated can comprise gravity treatment offset parameter Qoffset1, Qoffset2 and/or Sintercell etc.; Also can directly comprise the load information, bandwidth of cell ability of Serving cell and neighbor cell etc., can also comprise biasing parameter such as Qoffset1, Qoffset2 and/or Sintercell and load information, bandwidth of cell ability etc. simultaneously.Each reselecting parameters set pair should a kind of terminal bandwidth ability.The reselecting parameters collection corresponding like 20MHz terminal bandwidth ability comprises the gravity treatment offset parameter, comprises the load information, bandwidth of cell ability of Serving cell and neighbor cell etc. greater than the corresponding reselecting parameters collection of the terminal bandwidth ability of 20MHz.Owing to when calculating the reselecting parameters collection, not only,, make that the calculating of reselecting parameters collection is more reasonable, satisfy the needs of minizone load balancing better also according to the load and the bandwidth of cell of Serving cell and adjacent area thereof according to the load and the bandwidth of cell of Serving cell.
Then get into step 830, the base station issues the reselecting parameters collection of corresponding different terminals bandwidth ability through system broadcast information.
Then get into step 840, when district reselecting need be carried out in the terminal in this Serving cell, select corresponding reselecting parameters collection, carry out district reselecting according to the reselecting parameters collection of selecting according to the bandwidth ability of self.Specifically carrying out the mode of district reselecting according to the reselecting parameters collection can be with reference to existing cell reselection technique.
Equally; In this execution mode; If it is resident to the bigger sub-district of current residual load capacity that a large amount of non-occupied terminals take place, and initiate business respectively, cause influencing the situation of cut-in quality; Then, avoid causing the decline even the service disconnection of existing quality of service for this sub-district increases the RACH access-in resource.
Need to prove; In this execution mode mainly with terminal bandwidth ability representative of consumer grade; Network side generates corresponding multiple reselecting parameters collection according to the load information and the different terminal bandwidth ability of this sub-district and neighbor cell, and sacrificial vessel uses when having the terminal of corresponding bandwidth ability to carry out district reselecting.And in practical application; This user gradation also can be comprehensively to be confirmed by one of user signing contract information, terminal bandwidth ability, operator policy information or its combination in any; Network side is according to these integrated informations; And the load information of this sub-district and neighbor cell provides different reselecting parameters collection, and the terminal selects corresponding reselecting parameters collection to carry out the sub-district again according to its user gradation.
Fifth embodiment of the invention relates to residence reselecting in a kind of mobile communications network equally.In this execution mode; Network side is according to the user gradation (representing with bandwidth ability) at terminal; The reselecting parameters collection of the various load informations of correspondence is preset in the terminal; Network side is only broadcasted present load information, and the reselecting parameters collection of selecting this load information corresponding is concentrated from each reselecting parameters that presets in the terminal.Network side only needs the grade of load of periodic broadcast sub-district to get final product like this, has practiced thrift the resource of network side broadcast channel greatly.
Specifically as shown in Figure 9, in step 910, network side is according to user's average throughput of sub-district; Transmitting power; Parameters such as maximum access customer number are come the loading condition of evaluates cell, and definite grade of load parameter, like grade of load parameter value, the sluggish parameter value of load etc.For each grade of load, network side defines the reselecting parameters collection of corresponding different terminals bandwidth ability respectively, and this reselecting parameters collection can comprise offset parameter Qoffset1, Qoffset2 and/or Sintercell etc.
In step 920, network side is according to the bandwidth ability at terminal, and the reselecting parameters collection of all grades of load that this bandwidth ability is corresponding is preset in this terminal.Network side can through with the bandwidth ability of knowing the terminal alternately at terminal; Select again to issue this terminal with the reselecting parameters collection of corresponding all grades of load of bandwidth ability at this terminal, by this terminal preserve these reselecting parameters collection and with the corresponding relation of the grade of load.The mode that issues the reselecting parameters collection can be broadcasting, like beep-page message, also can use dedicated channel.
In step 930, network side periodic broadcast present load information.
In step 940, when district reselecting need be carried out in this terminal, concentrate the selection reselecting parameters collection corresponding with the load information of current broadcast from each reselecting parameters that presets.
In step 950, district reselecting is carried out according to selected reselecting parameters collection in the terminal.
In addition, in this execution mode, it is less the grade of load all to be regarded as load less than certain other situation of level, and in the case, the adjustment of load to district reselecting can not considered at the terminal.
Equally; In this execution mode; If it is resident to the bigger sub-district of current residual load capacity that a large amount of non-occupied terminals take place, and initiate business respectively, cause influencing the situation of cut-in quality; Then, avoid causing the decline even the service disconnection of existing quality of service for this sub-district increases the RACH access-in resource.
Need to prove that mainly with terminal bandwidth ability representative of consumer grade, network side is according to the bandwidth ability at terminal in this execution mode, the reselecting parameters collection of the various load informations of correspondence is preset in the terminal of corresponding bandwidth ability.And in practical application; This user gradation also can be comprehensively to be confirmed by one of user signing contract information, terminal bandwidth ability, operator policy information or its combination in any; Network side can be confirmed the reselecting parameters collection according to the user gradation of comprehensive affirmation; The reselecting parameters collection of the various load informations of correspondence is preset in the terminal with respective user grade, by the terminal reselecting parameters collection corresponding according to the present load Information Selection.
Sixth embodiment of the invention relates to residence reselecting in a kind of mobile communications network equally, is that with the difference of the 5th execution mode in this execution mode, network side is broadcasted various user gradations and the pairing reselecting parameters collection of various load information; The terminal receives and preserves each reselecting parameters collection of the pairing various load informations of self user gradation, and preserves the corresponding relation of these reselecting parameters collection and various load informations.Network side is with less periodic broadcasting present load information, and the reselecting parameters collection of selecting this load information corresponding is concentrated from each reselecting parameters of having preserved in the terminal.Network side can or be broadcasted each user gradation and the pairing reselecting parameters collection of various load information with the long cycle when the reselecting parameters collection changes; Thereby the reselecting parameters energy collecting that makes the terminal preserve enough in time obtains upgrading, and guarantees the accuracy of terminal district reselecting.And, can reach the effect of practicing thrift network side broadcast channel resource equally because the cycle of network side broadcasting reselecting parameters collection is very long.
Seventh embodiment of the invention relates to district reselecting system in a kind of mobile communications network, and end side comprises: the unit that obtains corresponding reselecting parameters collection according to the user gradation at this terminal; With the unit that carries out district reselecting according to this reselecting parameters collection.Network side comprises: the generation unit that generates at least two kinds of reselecting parameters collection according to cell load information and different user gradations; The unit of these reselecting parameters collection of broadcasting in this sub-district; The unit that end side is used to obtain the reselecting parameters collection is concentrated from each reselecting parameters of network side broadcasting according to the user gradation of self and is selected a reselecting parameters collection.Different reselecting parameters collection has been represented different gravity treatment probability in fact; Through different reselecting parameters collection being set for the terminal of different user grade; Make at cell load than hour gravity treatment probability at the terminal that the raising user gradation is bigger; When cell load is big, reduce the gravity treatment probability at the bigger terminal of user gradation, thereby make the load in the future of each minizone more balanced.Wherein, this reselecting parameters is concentrated and to be comprised the gravity treatment offset parameter, and this load information can represent with the grade of load simply, rather than concrete form more, so both can satisfy the requirement of district reselecting, can reduce the amount of information of representing load information again effectively.This generation unit can be only according to the load information of Serving cell and different at least two kinds of reselecting parameters collection of user gradation generation; Perhaps, the load information according to Serving cell and neighbor cell thereof generates at least two kinds of reselecting parameters collection with different user gradations.Through relevant information with reference to the adjacent area, can make the calculating of reselecting parameters collection more reasonable, satisfy the needs of minizone load balancing better.Wherein, user gradation is confirmed by one of user signing contract information, terminal bandwidth ability, operator policy information or its combination in any.
Network side can also comprise: through with the information interaction of adjacent base station, obtain not belong to bandwidth and the unit of load information of the neighbor cell of this base station; Perhaps, through measuring the signal of neighbor cell, obtain not belong to bandwidth and the unit of load information of the neighbor cell of this base station.
Network side can also comprise: the radio unit that bandwidth of cell and load information are broadcasted in Serving cell; End side is used to obtain bandwidth and the load information of the unit of reselecting parameters collection according to network side broadcasting, in conjunction with the user gradation at this terminal, calculates the reselecting parameters collection.This radio unit is only broadcasted the bandwidth and the load information of Serving cell in Serving cell; Perhaps, the bandwidth and the load information of Serving cell and adjacent area thereof are broadcasted in Serving cell together.Through issuing the load and the bandwidth information of sub-district by network side, calculate the reselecting parameters collection by the terminal voluntarily according to self user gradation, make the burden that reduces network side relatively.
Network side can also comprise: according to the user gradation at terminal, the reselecting parameters collection of the various grades of load of correspondence is sent to the unit at this terminal; Unit with broadcasting present load grade; End side also comprises the unit of the reselecting parameters collection of the corresponding various grades of load that receive and preserve the network side transmission; The unit that end side is used to obtain the reselecting parameters collection is from the concentrated corresponding reselecting parameters collection of this grade of load of selecting of each reselecting parameters of being preserved.
Perhaps, network side can also comprise: broadcast the unit of various user gradations and the pairing reselecting parameters collection of the various grade of load and the unit of broadcasting present load grade; The end side correspondence comprises the unit that receives and preserve pairing each the reselecting parameters collection of self user gradation, and the corresponding relation of these reselecting parameters collection and the various grades of load is also preserved in this unit; The unit that end side is used to obtain the reselecting parameters collection is from the concentrated corresponding reselecting parameters collection of this grade of load of selecting of each reselecting parameters of having preserved.Because network side only needs the grade of load of periodic broadcast sub-district to get final product, and has practiced thrift the resource of network side broadcast channel greatly.
Network side can also comprise: resident when the bigger sub-district of current residual load capacity causes influencing cut-in quality at a large amount of non-occupied terminals, and be the unit of this sub-district increase RACH access-in resource.
Said mobile communications network can be the network of the sub-district of any terminal that can support the different user grade simultaneously and different user grade in each execution mode of the present invention, like long-term evolving network.
In sum, in each execution mode of the present invention, select different reselecting parameters collection to carry out district reselecting according to the user gradation at different classes of terminal.User gradation can be formulated by user signing contract information, terminal bandwidth and other abilities, operator policy information etc. are comprehensive, also can be by a formulation wherein.Have the ability to initiate to take the business than heavy load such as the bigger terminal of bandwidth ability, say from the statistical significance, it is higher that the business of its initiation takies the desired value of load.Different reselecting parameters collection has been represented different gravity treatment probability in fact.In the bandwidth ability that has a kind of terminal at least during less than the bandwidth ability of sub-district; If when gravity treatment, consider the influence of terminal bandwidth ability; Can be through the setting of reselecting parameters collection; Hour improve the gravity treatment probability at the bigger terminal of bandwidth ability at cell load, when cell load is big, reduce the gravity treatment probability at the bigger terminal of bandwidth ability, thereby make the load in the future of each minizone more balanced.
The factor that can add bandwidth of cell when calculating the reselecting parameters collection increases the probability of terminal gravity treatment to the sub-district of comparatively mating with its bandwidth, thereby makes full use of the bandwidth resources of terminal and sub-district.For the terminal bandwidth ability less than the bandwidth of cell ability; Can take all factors into consideration the relative scale of cell load, terminal bandwidth ability and bandwidth of cell ability; Be the different reselecting parameters collection of terminal generation of different bandwidth capabilities, thereby make the load in the future of each minizone more balanced.
When calculating the reselecting parameters collection, can be only according to the load and the bandwidth of cell of Serving cell, also can be according to the load and the bandwidth of cell of Serving cell and adjacent area thereof.Through relevant information with reference to the adjacent area, can make the calculating of reselecting parameters collection more reasonable, satisfy the needs of minizone load balancing better.
Can carry out the calculating of reselecting parameters collection by network side, and will in the sub-district, broadcast, select corresponding reselecting parameters collection according to the user gradation of self by the terminal to the reselecting parameters collection of different user gradations.The burden at this mode terminal is less, thereby practices thrift the electric energy at terminal.
Also can issue the load and the bandwidth information of sub-district by network side, calculate the reselecting parameters collection voluntarily according to self user gradation by the terminal.The burden of this mode network side is less.
Load information can represent with the grade of load simply, rather than concrete form more, so both can satisfy the requirement of district reselecting, can reduce the amount of information of expression load information again effectively.
Network side can also be according to the user gradation at terminal, and the reselecting parameters collection of the various grades of load of correspondence is kept in this terminal; Perhaps network side is broadcasted various user gradations and the pairing reselecting parameters collection of the various grade of load, and the terminal receives and preserves pairing each the reselecting parameters collection of self user gradation, and preserves the corresponding relation of these reselecting parameters collection and the various grades of load.Concentrate the reselecting parameters collection of selecting this grade of load corresponding according to the grade of load of current area from each reselecting parameters of having preserved by the terminal.Network side only needs the grade of load of periodic broadcast sub-district to get final product like this, has practiced thrift the resource of network side broadcast channel greatly.
In above-mentioned each execution mode; Relate to the sub-district aspect; What mainly consider is the load and the bandwidth attribute of sub-district, but the present invention does not get rid of other attribute of considering the sub-district, and perhaps the class parameter according to a kind of sub-district of the comprehensive one-tenth of the various association attributeses of sub-district takes in again.
Though through reference some preferred implementation of the present invention; The present invention is illustrated and describes; But those of ordinary skill in the art should be understood that and can do various changes to it in form with on the details, and without departing from the spirit and scope of the present invention.
Claims (18)
1. residence reselecting in the mobile communications network is characterized in that, comprises following steps:
The terminal obtains corresponding reselecting parameters collection according to the user gradation of self;
District reselecting is carried out according to said reselecting parameters collection in said terminal;
Wherein, causing influencing cut-in quality if non-occupied terminal is resident in a large number to the bigger sub-district of current residual load capacity, then is that this sub-district increases the RACH access-in resource.
2. residence reselecting in the mobile communications network according to claim 1 is characterized in that, said terminal obtains the reselecting parameters collection through following steps:
Network side generates at least two kinds of reselecting parameters collection according to cell load information with different user gradations, these reselecting parameters collection of broadcasting in this sub-district;
Said terminal is concentrated from each reselecting parameters of said network side broadcasting according to the user gradation of self and is selected a reselecting parameters collection.
3. residence reselecting in the mobile communications network according to claim 2 is characterized in that, said network side only generates at least two kinds of reselecting parameters collection according to the load information of Serving cell with different user gradations; Perhaps,
Said network side generates at least two kinds of reselecting parameters collection according to the load information of Serving cell and neighbor cell thereof with different user gradations.
4. residence reselecting in the mobile communications network according to claim 1 is characterized in that, said terminal obtains the reselecting parameters collection through following steps:
Network side is broadcasted bandwidth of cell and load information in Serving cell;
Said terminal in conjunction with the user gradation at this terminal, calculates said reselecting parameters collection according to the bandwidth and the load information of said network side broadcasting.
5. residence reselecting in the mobile communications network according to claim 4 is characterized in that, said network side is only broadcasted the bandwidth and the load information of Serving cell in Serving cell; Perhaps,
Said network side is broadcasted the bandwidth and the load information of Serving cell and adjacent area thereof together in Serving cell.
6. residence reselecting in the mobile communications network according to claim 1 is characterized in that, said terminal obtains the reselecting parameters collection through following steps:
Network side is according to the user gradation at said terminal, and the reselecting parameters collection of the various load informations of correspondence is preset in this terminal;
Said network side broadcasting present load information, the reselecting parameters collection of selecting this load information corresponding is concentrated from each reselecting parameters that presets in said terminal.
7. residence reselecting in the mobile communications network according to claim 1 is characterized in that, said terminal obtains the reselecting parameters collection through following steps:
Network side is broadcasted various user gradations and the pairing reselecting parameters collection of various load information;
Said terminal receives and preserves pairing each the reselecting parameters collection of self user gradation, and preserves the corresponding relation of these reselecting parameters collection and various load informations;
Said network side broadcasting present load information, the reselecting parameters collection of selecting this load information corresponding is concentrated from each reselecting parameters of having preserved in said terminal.
8. according to residence reselecting in each described mobile communications network in the claim 2 to 7, it is characterized in that said load information is the grade of load.
9. according to residence reselecting in each described mobile communications network in the claim 1 to 8, it is characterized in that said user gradation is confirmed by one of following or its combination in any: user signing contract information, terminal capability, operator policy information.
10. according to residence reselecting in claim 3 or the 5 described mobile communications networks, it is characterized in that, the base station in the said network side through with the information interaction of adjacent base station, obtain not belong to the bandwidth and the load information of the neighbor cell of this base station; Perhaps,
Base station in the said network side is through measuring the signal of neighbor cell, and acquisition does not belong to the bandwidth and the load information of the neighbor cell of this base station.
11., it is characterized in that said reselecting parameters is concentrated and comprised the gravity treatment offset parameter according to residence reselecting in each described mobile communications network in the claim 1 to 8.
12. district reselecting system in the mobile communications network comprises end side and network side, it is characterized in that end side comprises: the unit that obtains corresponding reselecting parameters collection according to the user gradation at this terminal; With the unit that carries out district reselecting according to this reselecting parameters collection;
Said network side is resident when the bigger sub-district of current residual load capacity causes influencing cut-in quality at a large amount of non-occupied terminals, is this sub-district increase RACH access-in resource.
13. the district reselecting system is characterized in that in the mobile communications network according to claim 12, network side comprises: the unit that generates at least two kinds of reselecting parameters collection according to cell load information and different user gradations; The unit of these reselecting parameters collection of broadcasting in this sub-district;
The unit that said end side is used to obtain the reselecting parameters collection is concentrated from each reselecting parameters of said network side broadcasting according to the user gradation of self and is selected a reselecting parameters collection.
14. the district reselecting system is characterized in that in the mobile communications network according to claim 12, said network side comprises the unit that bandwidth of cell and load information are broadcasted in Serving cell;
Said end side is used to obtain bandwidth and the load information of the unit of reselecting parameters collection according to said network side broadcasting, in conjunction with the user gradation at this terminal, calculates said reselecting parameters collection.
15. the district reselecting system is characterized in that in the mobile communications network according to claim 12, said network side comprises: according to said user gradation, the reselecting parameters collection of the various grades of load of correspondence is sent to the unit at this terminal; Unit with broadcasting present load grade;
Said end side also comprises the unit of the reselecting parameters collection of the corresponding various grades of load that receive and preserve said network side transmission;
The unit that said end side is used to obtain the reselecting parameters collection is from the concentrated corresponding reselecting parameters collection of this grade of load of selecting of each reselecting parameters of being preserved.
16. the district reselecting system is characterized in that in the mobile communications network according to claim 12, said network side comprises: broadcast the unit of various user gradations and the pairing reselecting parameters collection of the various grade of load and the unit of broadcasting present load grade;
Said end side comprises the unit that receives and preserve pairing each the reselecting parameters collection of self user gradation, and the corresponding relation of these reselecting parameters collection and the various grades of load is also preserved in this unit;
The unit that said end side is used to obtain the reselecting parameters collection is from the concentrated corresponding reselecting parameters collection of this grade of load of selecting of each reselecting parameters of having preserved.
17., it is characterized in that said user gradation is confirmed by one of following or its combination in any: user signing contract information, terminal capability, operator policy information according to district reselecting system in each described mobile communications network in the claim 12 to 16.
18., it is characterized in that said mobile communications network is a long-term evolving network according to district reselecting system in each described mobile communications network in the claim 12 to 16.
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