CN104168630A

CN104168630A - Target cell determining method and device

Info

Publication number: CN104168630A
Application number: CN201410400823.3A
Authority: CN
Inventors: 吕婷; 李福昌; 陈国利
Original assignee: China United Network Communications Group Co Ltd
Current assignee: China United Network Communications Group Co Ltd
Priority date: 2014-08-14
Filing date: 2014-08-14
Publication date: 2014-11-26

Abstract

The embodiment of the invention provides a target cell determining method and device, and relates to the technical field of communications. In the switchover process of a main service cell or a relocation process of an auxiliary service cell of a carrier aggregation system, target cells to which UE is to have access are determined on the basis of cell carrier aggregation priorities determined according to transmission performance parameters of the cells, and therefore the success rate that the UE has access to the target cells can be improved, and the data transmission rate of the UE is ensured. The method includes the steps of determining at least one candidate cell according to a measurement report reported by the UE, obtaining the transmission performance parameters of the candidate cells, determining the carrier aggregation priorities of the candidate cells according to the transmission performance parameters of the candidate cells, and determining a target cell to which the UE is to have access from the candidate cells according to the carrier aggregation priorities of the candidate cells.

Description

A kind of method of definite Target cell and device

Technical field

The present invention relates to communication technical field, relate in particular to a kind of method and device of definite Target cell.

Background technology

Carrier aggregation technology is at 3GPP LTE-A (The 3rd Generation Partnership Project Long Term Evolution-Advanced, the senior Long Term Evolution of third generation partner program) key technology of introducing in system, carrier aggregation technology can obtain larger message transmission rate by increasing bandwidth.

At present, in carrier aggregation system, the UE (User Equipment, subscriber equipment) that carries out transfer of data based on carrier aggregation technology can have a plurality of Serving cells, specifically can comprise that main service is little) and auxiliary serving cell.In UE moving process, main Serving cell or auxiliary serving cell may change, when main Serving cell or auxiliary serving cell change, UE need access main Serving cell or the auxiliary serving cell after variation again, this is commonly referred to as the mobile management of carrier aggregation system, the mobile management of this carrier aggregation system can comprise the switching of main Serving cell and reconfiguring of auxiliary serving cell, wherein, reconfiguring of auxiliary serving cell comprises after definite main Serving cell switching, auxiliary serving cell reconfigures, and does not switch main Serving cell, and auxiliary serving cell is added or replaced.Reconfiguring of the switching of main Serving cell or auxiliary serving cell is specially: base station is to UE sending measuring configuration messages, UE measures and generates after measurement report according to measuring configuration messages to the signal quality of each neighbor cell, this measurement report is reported to this base station, in this base station selected this measurement report, the neighbor cell of signal quality optimum is as UE Target cell to be accessed (can for the main Serving cell of target of switching or the target secondary Serving cell reconfiguring), thereby completes the switching of main Serving cell or reconfiguring of auxiliary serving cell.

Yet, reconfiguring in process of the switching of the main Serving cell in carrier aggregation system or auxiliary serving cell, because Target cell is only determined according to the signal quality of each neighbor cell in measurement report in base station, therefore, if other transmission performance parameters of Target cell cannot guarantee handover success or reconfigure successfully, can have a strong impact on the success rate of UE access Target cell, and the message transmission rate of UE.

Summary of the invention

Embodiments of the invention provide a kind of method and device of definite Target cell, reconfiguring in process of the switching of the main Serving cell in carrier aggregation system or auxiliary serving cell, by according to the priority of the definite community of every transmission performance parameter of community, determine the Target cell that UE is to be accessed, thereby can improve the success rate of UE access Target cell, and guarantee the message transmission rate of UE.

For achieving the above object, embodiments of the invention adopt following technical scheme:

Embodiments of the invention provide a kind of method of definite Target cell, comprising:

According to the measurement report of reported by user equipment UE, determine at least one candidate cell;

Obtain the transmission performance parameter of described at least one candidate cell;

According to the transmission performance parameter of described at least one candidate cell, determine respectively the carrier aggregation priority of described at least one candidate cell;

According to the carrier aggregation priority of described at least one candidate cell, from described at least one candidate cell, determine described UE Target cell to be accessed.

Embodiments of the invention provide a kind of base station, comprising:

Determining unit, for determining at least one candidate cell according to the measurement report of reported by user equipment UE;

Acquiring unit, for obtaining the transmission performance parameter of definite described at least one candidate cell of described determining unit;

Described determining unit, also for the transmission performance parameter of described at least one candidate cell of obtaining according to described acquiring unit, determines respectively the carrier aggregation priority of described at least one candidate cell;

Described determining unit also, for according to the carrier aggregation priority of described at least one candidate cell, is determined described UE Target cell to be accessed from described at least one candidate cell.

Embodiments of the invention provide a kind of method and device of definite Target cell, reconfiguring in process of the switching of the main Serving cell in carrier aggregation system or auxiliary serving cell, base station is passed through according to the carrier aggregation priority of the definite community of every transmission performance parameter of community, determine the Target cell that UE is to be accessed, thereby can improve the success rate of UE access Target cell, and guarantee the message transmission rate of UE.

Accompanying drawing explanation

The flow chart of the method for a kind of definite Target cell that Fig. 1 provides for the embodiment of the present invention;

The interaction figure one of the method for a kind of definite Target cell that Fig. 2 provides for the embodiment of the present invention;

The interaction figure two of the method for a kind of definite Target cell that Fig. 3 provides for the embodiment of the present invention;

The interaction figure three of the method for a kind of definite Target cell that Fig. 4 provides for the embodiment of the present invention;

The interaction figure four of the method for a kind of definite Target cell that Fig. 5 provides for the embodiment of the present invention;

The structural representation one of a kind of base station that Fig. 6 provides for the embodiment of the present invention;

The structural representation two of a kind of base station that Fig. 7 provides for the embodiment of the present invention.

Embodiment

Method and the device of a kind of definite Target cell embodiment of the present invention being provided below in conjunction with accompanying drawing are described in detail.

Embodiment mono-

Embodiments of the invention provide a kind of method of definite Target cell, as shown in Figure 1, the base station under the main Serving cell, source that the executive agent base station in the embodiment of the present invention is UE, the method can comprise:

The measurement report that S101, base station report according to UE (User Equipment, subscriber equipment) is determined at least one candidate cell.

At carrier aggregation system, UE is in moving process, and UE can carry out a series of measurement, and the process that concrete UE measures is: base station sends and measures configuration messages to UE, this UE carries out the measurement of signal quality according to measuring configuration messages, and generates measurement report and be sent to base station.

It should be noted that, in measuring configuration messages, carried other association attributeses of measuring sign, measuring object, report configuration and measuring, wherein, measuring object comprises measuring object attribute, as frequency, Neighboring Cell List etc.; Report configuration comprises report triggering type, measuring amount, reports interval and reports the attributes such as number of times, as, report triggering type can report or periodically report for Event triggered.

Further, the different measurement sign of different measuring report configuration of same measuring object, UE identifies measuring object and report configuration association by measurement, form a complete measurement task, generate measurement report, wherein, in every measurement report, carry measurement sign, measure frequency, meet the sign of each adjacent area of report condition, the measuring amount of each adjacent area that meets report condition and the measuring amount of current service cell.In the embodiment of the present invention, base station according to the measuring amount of each adjacent area that meets report condition in measurement report or the measuring amount periodically reporting determine at least one candidate cell, the measurement report that base station reports according to UE is determined at least one candidate cell.

Wherein, for event-triggered reporting type, LTE-A system definition measurement event in system in 6, the trigger condition of each event is respectively:

Event A1: the signal measurement amount of Serving cell is greater than a certain threshold value;

Event A2: the signal measurement amount of Serving cell is less than a certain threshold value;

Event A3: the signal measurement amount of adjacent cell is greater than main Serving cell signal measurement amount and a certain side-play amount sum;

Event A4: the signal measurement amount of adjacent cell is greater than a certain threshold value;

Event A5: the signal measurement amount of main Serving cell is less than a certain threshold value, the signal measurement amount of adjacent cell is greater than another threshold value simultaneously;

Event A6: the signal measurement amount of co-frequency neighbor cell is greater than auxiliary serving cell signal measurement amount and a certain side-play amount sum.

Signal measurement amount when tested community meets above-mentioned a certain event entry condition, and during certain time length, UE reports corresponding event report to base station.

It should be noted that, in the embodiment of the present invention, provide in the method for the community that really sets the goal, it is to utilize periodically to report Report Type to determine candidate's auxiliary serving cell that auxiliary serving cell after switch main Serving cell reconfigures process, concrete, choose each community of measuring signal measurement amount maximum on frequency as candidate's auxiliary serving cell; Switch main Serving cell, auxiliary serving cell is added or replacement process utilizes event-triggered reporting type to determine candidate cell, and concrete, all adjacent areas of carrying in base station selection event report are as candidate cell.

Exemplary, when UE is in moving process, switch the main Serving cell of carrying out based on event A3, suppose that community 1, community 2 and community 3 are adjacent cell, community 4 is main Serving cell, and the adjacent cell that has met event A3 report condition is community 2 and community 3, so, UE is sent to base station by meeting the community 2 of this event A3 report condition and the relevant information of community 3 by measurement report, and this base station, according to this measurement report, determines that community 2 and community 3 are the main Serving cell of candidate.

S102, base station obtain the transmission performance parameter of at least one candidate cell.

After the measurement report that base station reports according to UE is determined at least one candidate cell, this base station obtains the transmission performance parameter of this at least one candidate cell.

Optionally, transmission performance parameter comprises signal quality, user's face resource redundancy rate and dedicated random access resource redundancy rate, uplink interference value and the candidate cell of community and the main Serving cell parameter of whether standing altogether.

Wherein, the signal quality of community is the measuring amount of carrying in the measurement report that reports of UE; User's face resource redundancy rate and dedicated random access resource are that base station obtains from network side, user's face resource mainly refers to PRB (the Physical Resource Block for up-downgoing business data transmission, Physical Resource Block) resource, the PRB resource of the business data transmission that is useful on of user's face resource redundancy rate=current unappropriated PRB quantity/cell configuration for business data transmission; Dedicated random access resource refers to lead code (preamble) resource that can distribute to UE and carry out non-competing random access, the lead code quantity of the non-competing random access that is useful on of dedicated random access resource redundancy rate=current unappropriated lead code resource quantity/cell configuration for non-competing random access; Uplink interference is that base station obtains by measuring the upward signal of the UE transmitting of other communities, this uplink interference adopts IOT (Interference Over Thermal) to represent, uplink interference value=current area measures the signal power/thermal noise power of the interference signal that the UE of other communities produces; Whether stand altogether candidate cell and main Serving cell, and parameter is used for characterizing candidate cell and whether stand altogether main Serving cell, and base station can judge whether candidate cell and main plot belong to same base station by obtaining the sign of candidate cell and the sign of main Serving cell.Concrete, base station obtains the sign of candidate cell and the sign of main Serving cell, and according to the mapping table of community and base station, determines the base station that candidate cell is affiliated, and the base station under main Serving cell, thereby judge whether altogether station of candidate cell and main Serving cell.For example, the sign of supposing at least one candidate cell is respectively PCI A and PCI C, main Serving cell be designated PCI B, base station is according to the mapping table of community and base station, find PCI A respective base station 1, PCI C and PCI B respective base station 2, therefore, this base station judgement candidate cell PCI A and main Serving cell PCI B do not stand altogether, and candidate cell PCI C and main Serving cell PCI B stand altogether.

Further, candidate cell and main Serving cell station is determined in base station whether altogether, determine according to different scenes.In the handoff procedure of main Serving cell, station, Yu Yuanzhu Serving cell, the main Serving cell of candidate is determined in base station whether altogether; In auxiliary serving cell replacement process, station, the main Serving cell of candidate's auxiliary serving cell and source is determined in base station whether altogether; In auxiliary serving cell adding procedure, station, the main Serving cell of candidate's auxiliary serving cell and source is determined in base station whether altogether; And auxiliary serving cell after switch main Serving cell reconfigures in process, base station determines whether candidate's auxiliary serving cell and the main Serving cell of target stand altogether.

It should be noted that, Yi Ge community comprises 64 available lead codes, and these 64 available lead codes can be divided into two groups, one group of random access being used for based on competition, and another group is for non-competing random access.The packet configuration of lead code sends to UE by base station by system message.Use in the embodiment of the present invention be the lead code in a group of non-competing random access.

The carrier aggregation priority of at least one candidate cell, according to the transmission performance parameter of at least one candidate cell, is determined respectively in S103, base station.

After base station obtains the transmission performance parameter of at least one candidate cell, the carrier aggregation priority of at least one candidate cell can, according to the transmission performance parameter of this at least one candidate cell, be calculated respectively in this base station.

The every transmission performance parametric synthesis of carrier aggregation priority based on candidate cell determined.Concrete, the signal quality of candidate cell is better, user's face resource redundancy rate is larger, dedicated random access resource redundancy rate is larger, uplink interference value is less, stand altogether in candidate cell and main Serving cell, and the carrier aggregation priority of this candidate cell is higher.

Concrete, the computational methods of carrier aggregation priority can have multiple, below only provide a kind of method example.

The signal quality of supposing candidate cell is expressed as ρ, user's face resource redundancy rate is expressed as α, and dedicated random access resource redundancy rate is expressed as β, and uplink interference value representation is γ, candidate cell and the main Serving cell Parametric Representation of whether standing is altogether δ, and carrier aggregation priority list is shown P;

The computing formula of carrier aggregation priority is:

P=A* ρ+B* α+C* β+D* γ+E* δ (formula 1)

Wherein, ρ, α, β, γ and δ are priority factors, and A, B, C, D, E are pre-configured weight coefficient, and its span is 0-1, and meets A+B+C+D+E=1; By weight coefficient is set, can adjust each priority factors proportion, the priority factors of considering for emphasis can arrange larger weight coefficient.

For preferential factor ρ, α, β and γ, can adopt the method for threshold judgement to determine its value.Concrete, suppose that Thresh_ ρ, Thresh_ α, Thresh_ β and Thresh_ γ are the threshold parameter that ρ, α, β and γ are corresponding, these threshold parameters are what when network configuration, set in advance.And threshold parameter corresponding to each priority factors can be set to a plurality of values, concrete, can determine by level threshold a plurality of values of priority factors.

For example, for preferential factor ρ, can set three grades of threshold parameters, this three utmost points threshold parameter is respectively Thresh_ ρ 1, Thresh_ ρ 2 and Thresh_ ρ 3, wherein, the size of this three utmost points threshold parameter is: Thresh_ ρ 1<Thresh_ ρ 2<Thresh_ ρ 3; And the signal quality of supposing candidate cell adopts RSRP (Reference Signal Receiving Power, Reference Signal Received Power):

If RSRP≤Thresh_1, ρ=0;

If Thresh_ ρ 1<RSRP≤Thresh_ ρ 2, ρ=1;

If Thresh_ ρ 2<RSRP≤Thresh_ ρ 3, ρ=2;

If RSRP>Thresh_ ρ 3, ρ=3;

The span that thus, can obtain ρ by three grades of thresholdings is 0-3.

For priority factors δ, based on candidate cell and main Serving cell, whether altogether determine its value in station; Concrete, if candidate cell and main Serving cell stand altogether, δ=1, otherwise, δ=0.

By above method, determine after the value of each priority factors, by the computing formula (formula 1) of the value substitution carrier aggregation priority of this priority factors, the value that can obtain final carrier aggregation priority P, the value of P is larger, represents that this carrier aggregation priority is higher.

Be understandable that, carrier aggregation priority in the embodiment of the present invention is the signal quality, user's face resource redundancy rate and dedicated random access resource redundancy rate, uplink interference value and the candidate cell that have considered community and the main Serving cell parameter of whether standing altogether, calculates.

UE Target cell to be accessed, according to the carrier aggregation priority of at least one candidate cell, is determined in S104, base station from least one candidate cell.

Base station is according to the transmission performance parameter of at least one candidate cell, after calculating respectively the carrier aggregation priority of at least one candidate cell, this base station is according to the carrier aggregation priority of at least one candidate cell, from at least one candidate cell, determine Target cell, this Target cell is UE community to be accessed.

Concrete, base station is according to the carrier aggregation priority of at least one candidate cell, from least one candidate cell, determines that at least one community that carrier aggregation priority is the highest is as Target cell.

Further, base station is when determining the main Serving cell of UE, and base station can, according to the carrier aggregation priority of at least one candidate cell, from least one candidate cell, determine that the highest Yi Ge of carrier aggregation priority community is as the main Serving cell of target; Base station is when determining the auxiliary serving cell of UE, base station can be according to the carrier aggregation priority of at least one candidate cell, from at least one candidate cell, determine that K community that carrier aggregation priority is the highest is as target secondary Serving cell, K >=1, concrete, for the auxiliary serving cell after auxiliary serving cell adding procedure and the switching of main Serving cell, reconfigure process, K >=1; For auxiliary serving cell replacement process, K=1.

Exemplary, suppose that the main Serving cell of at least one candidate that base station is determined is community 1, community 2 and community 3, its carrier aggregation priority is 3 >=community, 2 >=community, community 1.Base station, from community 1, community 2 and community 3, determines that community 2 is for the UE main Serving cell of target to be accessed.

The embodiment of the present invention provides the community method that really sets the goal can be applied to the mobility management process of UE, comprises the switching of main Serving cell, the process that reconfigures of auxiliary serving cell.

Embodiments of the invention provide a kind of method of definite Target cell, in the mobility management process of UE, base station determines that according to carrier aggregation priority candidate cell that carrier aggregation priority is the highest is as Target cell, both according to the signal quality of community, guaranteed again that abundance, the area interference of user's face resource and dedicated random access resource was less, stood altogether with main Serving cell.When UE accesses this Target cell, can avoid because of the congested handoff failure causing of Target cell dedicated random access resource, also can avoid because of Target cell user's face resource congestion, UE can dispatch inadequate resource or Target cell serious interference and switch the main Serving cell that causes or auxiliary serving cell reconfigures rear carrier aggregation transmission rate and declines, also can avoid due between base station, switch or base station between the problem of the complexity that realizes during carrier aggregation, be that base station is according to every transmission performance parameter information of each candidate cell, calculate the carrier aggregation priority of each candidate cell, and this base station is according to the carrier aggregation priority of this each candidate cell, determine the Target cell that UE is to be accessed.By this scheme, reconfiguring in process of the switching of the main Serving cell in carrier aggregation system or auxiliary serving cell, base station is according to the carrier aggregation priority by the definite community of every transmission performance parameter of community, determine the Target cell that UE is to be accessed, thereby can improve the success rate of UE access Target cell, and guarantee the message transmission rate of UE.

Embodiment bis-

Embodiments of the invention provide a kind of method of definite Target cell, as shown in Figure 2, specifically be applied in the handoff procedure of main Serving cell, wherein, at least one candidate cell is the main Serving cell of at least one candidate, and Target cell is the main Serving cell of target, when main Serving cell, source and the main Serving cell of at least one candidate belong to same base station, base station under the main Serving cell, source that executive agent base station in the embodiment of the present invention is UE, the method can comprise:

S201, base station send measures configuration messages to UE.

S202, UE are according to measuring configuration messages reporting measurement reports to base station.

Base station sends measures configuration messages to UE, and this UE is according to measuring configuration messages reporting measurement reports to base station.

It should be noted that, the different measurement sign of different measuring report configuration of same measuring object, UE identifies measuring object and report configuration association by measurement, form a complete measurement task, generate measurement report, wherein, in every measurement report, carry measurement sign, measure frequency, meet the sign of each adjacent area of report condition, the measuring amount of each adjacent area that meets report condition and the measuring amount of current service cell.In the embodiment of the present invention, base station according to the measuring amount of each adjacent area that meets report condition in measurement report or the measuring amount periodically reporting determine at least one candidate cell, the measurement report that base station reports according to UE is determined at least one candidate cell.

Event A3: the signal measurement amount of adjacent cell is greater than a certain side-play amount of main Serving cell signal measurement amount;

Signal measurement amount when tested community meets above-mentioned a certain event entry condition, and during certain time length, reports corresponding event report.

The measurement report that S203, base station report according to UE is determined the main Serving cell of at least one candidate.

UE is according to measuring configuration messages reporting measurement reports to base station, and the measurement report that this base station reports according to UE is determined the main Serving cell of at least one candidate.

It should be noted that, in embodiments of the present invention, utilize event-triggered reporting type to determine the main Serving cell of candidate, concrete, choose all adjacent areas of carrying in event report as the main Serving cell of candidate.

S204, base station obtain the transmission performance parameter of at least one main Serving cell of candidate, and the transmission performance parameter of main Serving cell, source, and main Serving cell, this source is currently to provide the main plot of service for UE.

After the measurement report that base station reports according to UE is determined the main Serving cell of at least one candidate, base station obtains the transmission performance parameter of at least one main Serving cell of candidate, and the transmission performance parameter of main Serving cell, source, main Serving cell, this source is currently to provide the main plot of service for UE.

Optionally, transmission performance parameter comprises signal quality, user's face resource redundancy rate and the Yu Yuanzhu Serving cell, the main Serving cell of dedicated random access resource redundancy rate, uplink interference value and candidate of the community parameter of whether standing altogether.

Wherein, the signal quality of community is the measuring amount of carrying in the measurement report that reports of UE; User's face resource redundancy rate and dedicated random access resource are that base station obtains from network side, user's face resource mainly refers to the PRB resource for up-downgoing business data transmission, the PRB resource of the business data transmission that is useful on of user's face resource redundancy rate=current unappropriated PRB quantity/cell configuration for business data transmission; Dedicated random access resource refers to can distribute to the lead code resource that UE carries out non-competing random access, the lead code quantity of the non-competing random access that is useful on of dedicated random access resource redundancy rate=current unappropriated lead code resource quantity/cell configuration for non-competing random access; To be base station obtain by measuring the upward signal of the UE transmitting of other communities uplink interference, and this uplink interference adopts IOT to represent, uplink interference value=current area measures the signal power/thermal noise power of the interference signal that the UE of other communities produces; Yu Yuanzhu Serving cell, the main Serving cell of the candidate parameter of whether standing is altogether used for characterizing Yu Yuanzhu Serving cell, the main Serving cell of candidate and whether belongs to same base station, and whether altogether base station can judge station, Yu Yuanzhu Serving cell, the main Serving cell of candidate by obtaining the sign of the main Serving cell of sign and source of the main Serving cell of candidate.Concrete, base station obtains the sign of the main Serving cell of sign and source of the main Serving cell of candidate, and according to the mapping table of community and base station, determine the base station that the main Serving cell of candidate is affiliated, and the base station under main Serving cell, source, thereby judge whether altogether station, Yu Yuanzhu Serving cell, the main Serving cell of candidate.For example, the sign of supposing at least one main Serving cell of candidate is respectively PCI A and PCI C, main Serving cell, source be designated PCI B, base station is according to the mapping table of community and base station, find PCI A respective base station 1, PCI C and PCI B respective base station 2, therefore, this base station judgement main Serving cell of candidate PCI A and main Serving cell, source PCI B do not stand altogether, and the main Serving cell of candidate PCI C and source main Serving cell PCI B stands altogether.

Especially, while obtaining the transmission characteristic parameter of at least one main Serving cell of candidate in base station, base station can obtain the transmission characteristic parameter of main Serving cell, source.UE in carrying out the handoff procedure of main Serving cell, the Wei Yuanzhu Serving cell, main Serving cell at the current place of UE, the main Serving cell that UE can switch to is the main Serving cell of candidate.

S205, base station are according to the transmission performance parameter of at least one main Serving cell of candidate, determine respectively the carrier aggregation priority of at least one main Serving cell of candidate, and according to the transmission performance parameter of main Serving cell, source, determine the carrier aggregation priority of main Serving cell, source.

Base station obtains the transmission performance parameter of at least one main Serving cell of candidate, and after the transmission performance parameter of main Serving cell, source, this base station is according to the transmission performance parameter of this at least one main Serving cell of candidate, determine respectively the carrier aggregation priority of at least one main Serving cell of candidate, and according to the transmission performance parameter of main Serving cell, source, determine the carrier aggregation priority of main Serving cell, source.

The every transmission performance parametric synthesis of carrier aggregation priority based on the main Serving cell of candidate determined.Concrete, the signal quality of the main Serving cell of candidate is better, user's face resource redundancy rate is larger, dedicated random access resource redundancy rate is larger, uplink interference value is less, stand altogether in Yu Yuanzhu Serving cell, the main Serving cell of candidate, and the carrier aggregation priority of this main Serving cell of candidate is higher.Concrete, the computational methods of carrier aggregation priority can have multiple, below only provide a kind of method example.

The signal quality of supposing the main Serving cell of candidate is expressed as ρ, user's face resource redundancy rate is expressed as α, dedicated random access resource redundancy rate is expressed as β, uplink interference value representation is γ, the main Serving cell of candidate and the main Serving cell of the target Parametric Representation of whether standing is altogether δ, and carrier aggregation priority list is shown P;

The computing formula of carrier aggregation priority is:

P=A* ρ+B* α+C* β+D* γ+E* δ (formula 1)

For example, for preferential factor ρ, can set three grades of threshold parameters, this three utmost points threshold parameter is respectively Thresh_ ρ 1, Thresh_ ρ 2 and Thresh_ ρ 3, wherein, the size of this three utmost points threshold parameter is: Thresh_ ρ 1<Thresh_ ρ 2<Thresh_ ρ 3; And the signal quality of supposing the main Serving cell of candidate adopts RSRP (Reference Signal Receiving Power, Reference Signal Received Power):

If RSRP≤Thresh_1, ρ=0;

If Thresh_ ρ 1<RSRP≤Thresh_ ρ 2, ρ=1;

If Thresh_ ρ 2<RSRP≤Thresh_ ρ 3, ρ=2;

If RSRP>Thresh_ ρ 3, ρ=3;

The span that thus, can obtain ρ by three grades of thresholdings is 0-3.

For priority factors δ, based on Yu Yuanzhu Serving cell, the main Serving cell of candidate, whether altogether determine its value in station; Concrete, if Yu Yuanzhu Serving cell, the main Serving cell of candidate stand altogether, δ=1, otherwise, δ=0.

By above method, determine after the value of each priority factors that substitution carrier aggregation priority computing formula (formula 1) can obtain the value of final carrier aggregation priority P.

Be understandable that, carrier aggregation priority in the embodiment of the present invention is the signal quality, user's face resource redundancy rate and the Yu Yuanzhu Serving cell, the main Serving cell of dedicated random access resource redundancy rate, uplink interference value and candidate that the have considered community parameter of whether standing altogether, calculates.

Further, base station is according to the transmission performance parameter of main Serving cell, source, and the method for carrier aggregation priority that at least one candidate service community is calculated in the method for the carrier aggregation priority of main Serving cell, calculating source and base station is identical.

The every transmission performance parametric synthesis of the carrier aggregation priority of main Serving cell, source based on main Serving cell, source determined.Concrete, the signal quality of main Serving cell, source is better, user's face resource redundancy rate is larger, dedicated random access resource redundancy rate is larger, uplink interference value is less, and the carrier aggregation priority of main Serving cell, source is higher.It should be noted that, while determining the carrier aggregation priority of main Serving cell, source, can be without considering whether to stand altogether this priority factors.

It should be noted that, S204 and S205 are a kind of attainable method of the embodiment of the present invention, concrete implementation the present invention is not restricted, for example, except above-mentioned implementation, base station can first obtain the transmission performance parameter of the main Serving cell of candidate and determine the carrier aggregation priority of this main Serving cell of candidate, then obtains the transmission performance parameter of main Serving cell, source and the carrier aggregation priority of definite this main Serving cell, source; Base station also can first obtain the transmission performance parameter of main Serving cell, source and determine the carrier aggregation priority of this main Serving cell, source, then obtains the transmission performance parameter of the main Serving cell of candidate and the carrier aggregation priority of definite this main Serving cell of candidate.

The UE main Serving cell of target to be accessed, according to the carrier aggregation priority of at least one main Serving cell of candidate, is determined in S206, base station from the main Serving cell of at least one candidate.

Base station is according to the transmission performance parameter of at least one main Serving cell of candidate, determine respectively the carrier aggregation priority of at least one main Serving cell of candidate, and according to the transmission performance parameter of main Serving cell, source, after determining the carrier aggregation priority of main Serving cell, source, the UE main Serving cell of target to be accessed, according to the carrier aggregation priority of at least one main Serving cell of candidate, is determined in this base station from the main Serving cell of at least one candidate.

If the carrier aggregation priority of the main Serving cell of S207 target is not less than the carrier aggregation priority of main Serving cell, source, the UE access main Serving cell of target is determined in base station.

Base station is according to the carrier aggregation priority of at least one main Serving cell of candidate, from the main Serving cell of at least one candidate, after determining the main Serving cell of UE target to be accessed, if the carrier aggregation priority of the main Serving cell of target that this base station is definite is not less than the carrier aggregation priority of main Serving cell, source, this base station determines that main Serving cell switches to the main Serving cell of this target to UE from source.

If the carrier aggregation priority of the main Serving cell of S208 target is lower than the carrier aggregation priority of main Serving cell, source, base station determines that UE does not access the main Serving cell of this target.

Base station is according to the carrier aggregation priority of at least one main Serving cell of candidate, from the main Serving cell of at least one candidate, after determining the main Serving cell of UE target to be accessed, if the carrier aggregation priority of the main Serving cell of target is lower than the carrier aggregation priority of main Serving cell, source, this base station determines that UE does not switch to the main Serving cell of this target.

Further, base station is according to the carrier aggregation priority of at least one main Serving cell of candidate, determine the main Serving cell of target from the main Serving cell of at least one candidate after, the measurement report that base station reports according to UE judges whether main Serving cell, source meets S criterion.If meet S criterion, carry out S207 or S208; If do not meet S criterion, from source, main Serving cell switches to the main Serving cell of target to base station indication UE.

S criterion is that UE can reside in certain community and guarantee the criterion that proper communication is required to meet.Wherein, S criterion is:

Srxlev>0 and Squal>0;

Srxlev＝Qrxlevmeas–Qrxlevmin–Pcompensation；

Squal＝Qqualmeas–Qqualmin；

Pcompensation＝max(PEMAX–PPowerClass，0)；

Wherein, Qrxlevmeas, Qqualmeas are respectively RSRP, the RSRQ (Reference Signal Receiving Quality, Reference Signal Received Quality) that UE measures Gai community; Qrxlevmin, Qqualmin are respectively the access desired minimum RSRP in this community, minimum RSRQ; The maximum uplink transmission power of UE that PEMAX Shi Gai community allows, PPowerClass is the maximum radio frequency power output that UE supports.

If the signal measurement amount of community meets the requirement of S criterion, UE can normally reside in this community.

Be understandable that, in the situation that meeting S criterion, the carrier aggregation priority of the main Serving cell of carrier aggregation priority and source of the main Serving cell of comparison object is also wanted in base station, in the carrier aggregation priority of the main Serving cell of target during lower than the carrier aggregation priority of main Serving cell, source, base station refusal UE carries out main Serving cell, source to the switching of the main Serving cell of target, like this, avoided in the situations such as Target cell inadequate resource or serious interference, UE when main Serving cell switches to this main Serving cell of target from source, causes the problem of handoff failure or admission reject.

It should be noted that, S207 and S208 are two optional steps after S206,, can carry out S206 and S207 that is, also can carry out S206 and S208, concrete see actual conditions and determine.

Further, after S207, the embodiment of the present invention provides the method for the community that really sets the goal also to comprise: S209-S215, specific as follows:

S209, base station obtain the polymerizing power information that UE reports.

If the carrier aggregation priority of the main Serving cell of target is not less than the carrier aggregation priority of main Serving cell, source, after the UE access main Serving cell of target is determined in base station, this base station obtains the polymerizing power information that UE reports.

It should be noted that, the maximum polymerization carrier number that UE supports is limited, in the mobility management process of UE, need consider the maximum polymerization carrier number that UE supports, be UE in the handoff procedure of main Serving cell, the quantity sum of the quantity of target secondary Serving cell and the main Serving cell of target can not surpass the maximum polymerization carrier number that UE supports.

At least one candidate's auxiliary serving cell, according to measurement report, is determined in S210, base station, and this base station is according to polymerizing power information, determines the maximum polymerization carrier number N that UE supports, wherein, and N >=2.

After base station obtains the polymerizing power information of UE, the measurement report that this base station can report according to UE, determines at least one candidate's auxiliary serving cell, and base station is according to polymerizing power information, determines the maximum polymerization carrier number N that this UE can support, N >=2.

It should be noted that, polymerization carrier number corresponding with service community number, UE supports several polymerization carrier waves, UE just can have several Serving cells.The embodiment of the present invention is applicable to carrier aggregation system, and therefore, the maximum polymerization carrier number that UE supports is at least more than or equal to 2.

The measurement report that base station can report according to UE, determine at least one candidate's auxiliary serving cell: concrete, the measurement report that base station can report according to UE, select the highest Yi Ge of signal quality community on each frequency, generate the list of candidate's auxiliary serving cell, thereby determined at least one candidate's auxiliary serving cell.

S211, base station obtain the transmission performance parameter of at least one candidate's auxiliary serving cell.

After the maximum polymerization carrier number N and at least one candidate's auxiliary serving cell that UE supports determined in base station, this base station obtains the transmission performance parameter of at least one candidate's auxiliary serving cell.

Concrete, when main Serving cell, source and the main Serving cell of target belong to same base station, this base station obtains the transmission performance parameter of at least one candidate's auxiliary serving cell from network side.

The carrier aggregation priority of at least one candidate's auxiliary serving cell, according to the transmission performance parameter of at least one candidate's auxiliary serving cell, is determined respectively in S212, base station.

After base station obtains the transmission performance parameter of at least one candidate's auxiliary serving cell, the carrier aggregation priority of at least one candidate's auxiliary serving cell can, according to the transmission performance parameter of at least one candidate's auxiliary serving cell, be calculated respectively in this base station.

The computational methods of concrete carrier aggregation priority explain in the previous section of the embodiment of the present invention, repeat no more herein.

S213, base station be according to the carrier aggregation priority of at least one candidate's auxiliary serving cell, from least one candidate's auxiliary serving cell, determines that N-1 candidate's auxiliary serving cell that carrier aggregation priority is the highest is as UE target secondary Serving cell to be accessed.

Base station is according to the transmission performance parameter of at least one candidate's auxiliary serving cell, after determining the carrier aggregation priority of at least one candidate's auxiliary serving cell respectively, this base station can be according to the carrier aggregation priority of this at least one candidate's auxiliary serving cell, from at least one candidate's auxiliary serving cell, determine that N-1 candidate's auxiliary serving cell that carrier aggregation priority is the highest is target secondary Serving cell, this target secondary Serving cell is UE community to be accessed.

It should be noted that, the previous section of the embodiment of the present invention, base station has determined that main Serving cell is switched to the main Serving cell of target to UE from source, be that UE has accessed a main Serving cell, at this moment, the auxiliary serving cell number that UE can configure is N-I, and therefore, base station determines that N-1 candidate's auxiliary serving cell that carrier aggregation priority is the highest is as target secondary Serving cell.

S214, base station send the first Indication message to UE, and this first Indication message is used to indicate the UE access main Serving cell of target and target secondary Serving cell.

Base station is according to the carrier aggregation priority of at least one candidate's auxiliary serving cell, from at least one candidate's auxiliary serving cell, determine that N-1 candidate's auxiliary serving cell that carrier aggregation priority is the highest is as after UE target secondary Serving cell to be accessed, this base station sends the first Indication message to UE, and this first Indication message is used to indicate the UE access main Serving cell of target and target secondary Serving cell.

Concrete, specifically for indication UE, from source, main Serving cell switches to the main Serving cell of target to the first Indication message, and reconfigures target secondary Serving cell.

Optionally, base station sends the first Indication message to UE, is that the mode with RRC (Radio Resource Control, radio resource control) signaling sends.

S215, UE switch to the main Serving cell of target by main Serving cell, source, and configuration purpose mark auxiliary serving cell again.

Base station sends the first Indication message to UE, and this UE switches between main Serving cell, source and the main Serving cell of target, and configuration purpose mark auxiliary serving cell again.

It should be noted that, UE is when carrying out the switching of main Serving cell, and the auxiliary serving cell of this UE will reconfigure.

Embodiments of the invention also provide a kind of method of definite Target cell, as shown in Figure 3, specifically be applied in the handoff procedure of main Serving cell, wherein, at least one candidate cell is the main Serving cell of at least one candidate, Target cell is the main Serving cell of target, base station under main Serving cell, source is source base station, base station under the main Serving cell of at least one candidate is target BS, when main Serving cell, source and the main Serving cell of at least one candidate belong to different base station, the method can comprise S301-S319, specific as follows:

S301, source base station send measures configuration messages to UE.

Concrete source base station transmission measurement configuration messages to process and the associated description of UE can, with reference to step and the description thereof of the S201 in the embodiment of the present invention, repeat no more herein.

S302, UE are according to measuring configuration messages reporting measurement reports to source base station.

Concrete UE can, with reference to step and the description thereof of the S202 in the embodiment of the present invention, repeat no more according to measuring process and the associated description of configuration messages reporting measurement reports to source base station herein.

The measurement report that S303, source base station report according to UE is determined the main Serving cell of at least one candidate.

The measurement report that concrete source base station reports according to UE determines that the process of at least one main Serving cell of candidate and associated description can, with reference to step and the description thereof of the S203 in the embodiment of the present invention, repeat no more herein.

S304, source base station send resource status request message to target BS, and this resource status request message provides respectively the transmission performance parameter of at least one main Serving cell of candidate for request target base station.

After the measurement report that source base station reports according to UE is determined the main Serving cell of at least one candidate, source base station sends resource status request message to target BS, and this resource status request message provides respectively the transmission performance parameter of at least one main Serving cell of candidate for request target base station.

It should be noted that, base station under this main Serving cell of at least one candidate is the base station different from source base station, while being target BS, source base station need send resource status request message to target BS, obtains the transmission performance parameter of this at least one candidate cell with request target base station.

S305, target BS send resource status response message to source base station, carry the transmission performance parameter of at least one main Serving cell of candidate in this resource status response message.

Source base station sends resource status request message to target BS, and target BS sends resource status response message to source base station, carries the transmission performance parameter of at least one main Serving cell of candidate in this resource status response message.

Optionally, source base station sends resource status request to target BS, and target BS to send resource status response message to source base station be all that method with RRC signaling sends.

It should be noted that, because the base station under the Yu Yuanzhu Serving cell, base station under the main Serving cell of at least one candidate in the embodiment of the present invention is different, therefore,, when source base station obtains the transmission performance parameter of this at least one main Serving cell of candidate, obtain by request target base station.

It will be appreciated by persons skilled in the art that when Jian community, base station communicates, is all to be undertaken by the main Serving cell of the base station under this community.

S306, source base station obtain the transmission performance parameter of main Serving cell, source, and main Serving cell, this source is currently to provide the main plot of service for UE.

Target BS sends resource status response message to source base station, and this source base station obtains the transmission performance parameter of main Serving cell, source, and main Serving cell, this source is currently to provide the main plot of service for UE.

Optionally, resource status request message and source status response message can be the message (such as RESOURCE STATUS REQUEST, RESOURCE STATUS RESPONSE, RESOURCE STATUS RESPONSE) defining in existing X2 interface agreement, can be newly-increased message, the present invention be restricted yet.

It should be noted that, the embodiment of the present invention does not limit the execution sequence of S304-S305 and S306, that is, after S303, can first carry out S304-S305, then carry out S306; Also can first carry out S306, then carry out S304-S305.

S307, source base station are according to the transmission performance parameter of at least one main Serving cell of candidate, determine respectively the carrier aggregation priority of at least one main Serving cell of candidate, and according to the transmission performance parameter of main Serving cell, source, determine the carrier aggregation priority of main Serving cell, source.

Concrete source base station is according to the transmission performance parameter of at least one main Serving cell of candidate, determine respectively the carrier aggregation priority of at least one main Serving cell of candidate, and according to the transmission performance parameter of main Serving cell, source, process and the associated description of determining the carrier aggregation priority of main Serving cell, source can, with reference to step and the description thereof of the S205 in the embodiment of the present invention, repeat no more herein.

S308, source base station, according to the carrier aggregation priority of at least one main Serving cell of candidate, are determined the UE main Serving cell of target to be accessed from the main Serving cell of at least one candidate.

Concrete source base station is according to the carrier aggregation priority of at least one main Serving cell of candidate, process and the associated description of from the main Serving cell of at least one candidate, determining the main Serving cell of target that UE is to be accessed can, with reference to step and the description thereof of the S206 in the embodiment of the present invention, repeat no more herein.

If the carrier aggregation priority of the main Serving cell of S309 target is not less than the carrier aggregation priority of main Serving cell, source, source base station is determined the UE access main Serving cell of target.

If the carrier aggregation priority of the concrete main Serving cell of target is not less than the carrier aggregation priority of main Serving cell, source, source base station determines that process and the associated description of the UE access main Serving cell of target can, with reference to step and the description thereof of the S207 in the embodiment of the present invention, repeat no more herein.

If the carrier aggregation priority of the main Serving cell of S310 target is lower than the carrier aggregation priority of main Serving cell, source, source base station determines that UE does not access the main Serving cell of this target.

If the carrier aggregation priority of the concrete main Serving cell of target is lower than the carrier aggregation priority of main Serving cell, source, source base station process and associated description that definite UE does not access this main Serving cell of target can, with reference to step and the description thereof of the S208 in the embodiment of the present invention, repeat no more herein.

Further, after S309, the embodiment of the present invention also provides the method for the community that really sets the goal also to comprise: S311-S319, specific as follows:

S311, source base station obtain the polymerizing power information that UE reports.

Process and associated description that concrete source base station obtains the polymerizing power information that UE reports can, with reference to step and the description thereof of the S209 in the embodiment of the present invention, repeat no more herein.

S312, source base station, according to measurement report, are determined at least one candidate's auxiliary serving cell, and this source base station is according to polymerizing power information, determines the maximum polymerization carrier number N that UE supports, wherein, and N >=2.

Concrete source base station is according to measurement report, determine at least one candidate's auxiliary serving cell, and this source base station is according to polymerizing power information, determines that process and the associated description of the maximum polymerization carrier number N that UE supports can, with reference to step and the description thereof of the S210 in the embodiment of the present invention, repeat no more herein.

S313, source base station send handover request message to target BS, and this handover request message is determined target secondary Serving cell for request target base station.

Source base station is according to measurement report, determine at least one candidate's auxiliary serving cell, and this source base station is according to polymerizing power information, after determining the maximum polymerization carrier number N of UE support, this source base station sends handover request message to target BS, and this handover request message is determined target secondary Serving cell for request target base station.

Optionally, handover request message is carried sign, at least one candidate's auxiliary serving cell list of the main Serving cell of target.

S314, target BS, according to handover request message, obtain the transmission performance parameter of at least one candidate's auxiliary serving cell.

Source base station sends handover request message to target BS, target BS is according to handover request message, the transmission performance parameter of obtaining at least one candidate's auxiliary serving cell, concrete, target BS obtains the transmission performance parameter of at least one candidate's auxiliary serving cell from network side or other base stations.

S315, target BS, according to the transmission performance parameter of at least one candidate's auxiliary serving cell, are determined respectively the carrier aggregation priority of at least one candidate's auxiliary serving cell.

Concrete, target BS is according to the transmission performance parameter of at least one candidate's auxiliary serving cell, process and the associated description of determining respectively the carrier aggregation priority of at least one candidate's auxiliary serving cell can, with reference to step and the description thereof of the S212 in the embodiment of the present invention, repeat no more herein.

Different, the executive agent in this step is target BS.In the computational methods of carrier aggregation priority, candidate cell and the main Serving cell parameter of whether standing altogether, specifically refers to the main Serving cell of candidate's auxiliary serving cell and the target parameter of whether standing altogether.

S316, target BS be according to the carrier aggregation priority of at least one candidate's auxiliary serving cell, from least one candidate's auxiliary serving cell, determines that N-1 candidate's auxiliary serving cell that carrier aggregation priority is the highest is as UE target secondary Serving cell to be accessed.

Concrete, target BS is according to the carrier aggregation priority of at least one candidate's auxiliary serving cell, from at least one candidate's auxiliary serving cell, determine that N-1 candidate's auxiliary serving cell that carrier aggregation priority is the highest can, with reference to step and the description thereof of the S213 in the embodiment of the present invention, repeat no more as process and the associated description of UE target secondary Serving cell to be accessed herein.

Different, the executive agent in this step is target BS.

S317, target BS send switching request acknowledgement message to source base station, and this switching request acknowledgement message is carried the sign of target secondary Serving cell.

Target BS is according to the carrier aggregation priority of at least one candidate's auxiliary serving cell, from at least one candidate's auxiliary serving cell, determine that N-1 candidate's auxiliary serving cell that carrier aggregation priority is the highest is as after UE target secondary Serving cell to be accessed, target BS sends switching request acknowledgement message to source base station, and this switching request acknowledgement message is carried the sign of target secondary Serving cell.

S318, source base station send the first Indication message to UE, and this first Indication message is used to indicate the UE access main Serving cell of target and target secondary Serving cell.

Target BS sends switching request acknowledgement message to source base station, source base station has got the sign of target secondary Serving cell, so source base station sends the first Indication message to UE, this first Indication message is used to indicate the UE access main Serving cell of target and target secondary Serving cell.

Concrete, source base station sends the first Indication message to UE, process and associated description that this first Indication message is used to indicate the UE access main Serving cell of target and target secondary Serving cell can, with reference to step and the description thereof of the S214 in the embodiment of the present invention, repeat no more herein.

S319, UE switch to the main Serving cell of target by main Serving cell, source, and configuration purpose mark auxiliary serving cell again.

Concrete, UE switches to the main Serving cell of target by main Serving cell, source, and process and the associated description of configuration purpose mark auxiliary serving cell can, with reference to step and the description thereof of the S215 in the embodiment of the present invention, repeat no more herein again.

Embodiments of the invention also provide a kind of method of definite Target cell, as shown in Figure 4, specifically be applied in the replacement process of the constant auxiliary serving cell in main Serving cell, base station under Wei Gaizhu Serving cell, base station in the embodiment of the present invention, wherein, at least one candidate cell is at least one auxiliary serving cell, and Target cell is target secondary Serving cell, the method can comprise: S401-S410, specific as follows:

S401, base station send measures configuration messages to UE.

Concrete base station transmission measurement configuration messages to process and the associated description of UE can, with reference to step and the description thereof of the S201 in the embodiment of the present invention, repeat no more herein.

S402, UE are according to measuring configuration messages reporting measurement reports to base station.

Concrete UE can, with reference to step and the description thereof of the S202 in the embodiment of the present invention, repeat no more according to measuring process and the associated description of configuration messages reporting measurement reports to base station herein.

The measurement report that S403, base station report according to UE is determined at least one candidate's auxiliary serving cell.

The measurement report that concrete base station reports according to UE determines that at least one candidate's auxiliary serving cell process and associated description can, with reference to step and the description thereof of the S203 in the embodiment of the present invention, repeat no more herein.

It should be noted that, the candidate cell in this step is auxiliary serving cell.

S404, base station obtain the transmission performance parameter of at least one candidate's auxiliary serving cell, and the transmission performance parameter of source auxiliary serving cell.

Concrete base station obtains the transmission performance parameter of at least one candidate's auxiliary serving cell, and the process of the transmission performance parameter of source auxiliary serving cell and associated description can, with reference to step and the description thereof of the S204 in the embodiment of the present invention, repeat no more herein.

Concrete, when main Serving cell and at least one candidate's auxiliary serving cell belong to same base station, base station obtains the transmission performance parameter of at least one candidate's auxiliary serving cell from network side, when main Serving cell and at least one candidate's auxiliary serving cell belong to different base station, base station obtains the transmission performance parameter of this at least one auxiliary serving cell from the base station under at least one candidate's auxiliary serving cell, be that X2 interface is passed through in base station, send resource status request message to the base station under this at least one auxiliary serving cell, ask the affiliated base station of this at least one auxiliary serving cell to determine the transmission performance parameter of this at least one auxiliary serving cell, and receive the resource status response message that the base station under this at least one auxiliary serving cell sends, in this resource status response message, carry the transmission performance parameter of this at least one auxiliary serving cell.

S405, base station are according to the transmission performance parameter of at least one candidate's auxiliary serving cell, determine respectively the carrier aggregation priority of at least one candidate's auxiliary serving cell, and according to the transmission performance parameter of source auxiliary serving cell, determine the carrier aggregation priority of source auxiliary serving cell.

Concrete base station is according to the transmission performance parameter of at least one candidate's auxiliary serving cell, determine respectively the carrier aggregation priority of at least one candidate's auxiliary serving cell, and according to the transmission performance parameter of source auxiliary serving cell, process and the associated description of determining the carrier aggregation priority of source auxiliary serving cell can, with reference to step and the description thereof of the S205 in the embodiment of the present invention, repeat no more herein.

Candidate cell in this step is auxiliary serving cell, and cell-of-origin is source auxiliary serving cell.

It should be noted that, S404 and S405 are a kind of attainable method of the embodiment of the present invention, concrete implementation the present invention is not restricted, for example, except above-mentioned implementation, base station can first obtain the transmission performance parameter of candidate's auxiliary serving cell and determine the carrier aggregation priority of this candidate's auxiliary serving cell, then obtains the transmission performance parameter of source auxiliary serving cell and the carrier aggregation priority of definite this source auxiliary serving cell; Base station also can first obtain the transmission performance parameter of source auxiliary serving cell and determine the carrier aggregation priority of this source auxiliary serving cell, then obtains the transmission performance parameter of candidate's auxiliary serving cell and the carrier aggregation priority of definite this candidate's auxiliary serving cell.

UE target secondary Serving cell to be accessed, according to the carrier aggregation priority of at least one candidate's auxiliary serving cell, is determined in S406, base station from least one candidate's auxiliary serving cell.

Concrete base station is according to the carrier aggregation priority of at least one candidate's auxiliary serving cell, process and the associated description of from least one candidate's auxiliary serving cell, determining the target secondary Serving cell that UE is to be accessed can, with reference to step and the description thereof of the S206 in the embodiment of the present invention, repeat no more herein.

It should be noted that, the candidate cell in this step is auxiliary serving cell, and Target cell is target secondary Serving cell.

If the carrier aggregation priority of S407 target secondary Serving cell is not less than the carrier aggregation priority of source auxiliary serving cell, base station determines that UE accesses this target secondary Serving cell.

If the carrier aggregation priority of concrete target secondary Serving cell is not less than the carrier aggregation priority of source auxiliary serving cell, base station process and associated description that definite UE accesses this target secondary Serving cell can, with reference to step and the description thereof of the S207 in the embodiment of the present invention, repeat no more herein.

It should be noted that, the cell-of-origin in this step is source auxiliary serving cell, and Target cell is target secondary Serving cell.

If the carrier aggregation priority of S408 target secondary Serving cell is lower than the carrier aggregation priority of source auxiliary serving cell, base station determines that UE does not access this target secondary Serving cell.

If the carrier aggregation priority of concrete target secondary Serving cell is lower than the carrier aggregation priority of source auxiliary serving cell, base station process and associated description that definite UE does not access this target secondary Serving cell can, with reference to step and the description thereof of the S208 in the embodiment of the present invention, repeat no more herein.

It should be noted that, S407 and S408 are after S406, and two optional steps, can be carried out S406 and S407 that is, also can carry out S406 and S408, and concrete sees actual conditions and determine.

S409, base station send the second Indication message to UE, and this second Indication message is used to indicate this UE source auxiliary serving cell is deleted, and adds target secondary and serve to the auxiliary serving cell set of UE.

S410, UE, according to the second Indication message, delete source auxiliary serving cell, and add target secondary Serving cell to the auxiliary serving cell set of UE.

Further, as shown in Figure 5, be specifically applied in the adding procedure of auxiliary serving cell, after S403, said method can also comprise: S411-S416, specific as follows:

S411, base station obtain the polymerizing power information that UE reports.

Process and associated description that concrete base station obtains the polymerizing power information that UE reports can, with reference to step and the description thereof of the S209 in the embodiment of the present invention, repeat no more herein.

The maximum polymerization carrier number N that this UE supports, according to polymerizing power information, is determined in S412, base station, and the current polymerization carrier number M of definite UE, wherein, and M >=1, N >=2.

After base station obtains the polymerizing power information that UE reports, the polymerization carrier number M that UE is current is determined in this base station, and the polymerization carrier number N of this UE maximum, wherein, and M >=1, N >=2.

Exemplary, base station, according to polymerizing power information, determines that the maximum polymerization carrier number N that UE supports is 5, and UE is current, for UE provides the community of service, has 3, current polymerization carrier number is 3.

If S413 M < is N, base station obtains the transmission performance parameter of at least one candidate's auxiliary serving cell, and according to the transmission performance parameter of this at least one candidate's auxiliary serving cell, determine respectively the carrier aggregation priority of at least one candidate's auxiliary serving cell.

Base station is according to polymerizing power information, determine the maximum polymerization carrier number N that this UE supports, and after the current polymerization carrier number M of definite UE, if M < is N, this base station obtains the transmission performance parameter of at least one candidate's auxiliary serving cell, and according to the transmission performance parameter of this at least one candidate's auxiliary serving cell, determine respectively the carrier aggregation priority of at least one candidate's auxiliary serving cell.

It should be noted that, when main Serving cell and at least one candidate's auxiliary serving cell belong to same base station, base station obtains the transmission performance parameter of at least one candidate's auxiliary serving cell from network side, when main Serving cell and at least one candidate's auxiliary serving cell belong to different base station, base station obtains the transmission performance parameter of this at least one auxiliary serving cell from the base station under at least one candidate's auxiliary serving cell, concrete, X2 interface is passed through in base station, send resource status request message to the base station under this at least one auxiliary serving cell, ask the affiliated base station of this at least one auxiliary serving cell to determine the transmission performance parameter of this at least one auxiliary serving cell, and receive the resource status response message that the base station under this at least one auxiliary serving cell sends, in this resource status response message, carry the transmission performance parameter of this at least one auxiliary serving cell.

Be understandable that, only, when M < N, UE just has unnecessary ability to carry out the interpolation of auxiliary serving cell, if M=N, being characterized by UE provides the community number of service to reach the maximum polymerization carrier number of UE support, can not add auxiliary serving cell again.

S414, base station be according to the carrier aggregation priority of at least one candidate's auxiliary serving cell, from this at least one candidate's auxiliary serving cell, determines that N-M candidate's assistant service community that carrier aggregation priority is the highest is as UE target secondary Serving cell to be accessed.

If M < is N, base station is according to the transmission performance parameter of at least one candidate's auxiliary serving cell, after determining the carrier aggregation priority of at least one candidate's auxiliary serving cell respectively, this base station is according to the carrier aggregation priority of at least one candidate's auxiliary serving cell, from this at least one candidate's auxiliary serving cell, determine that N-M candidate's assistant service community that carrier aggregation priority is the highest is target secondary Serving cell.

Further, when target secondary Serving cell is Zhong community, other base station, base station sends resource request message by X2 interface to the base station under this auxiliary serving cell, with request target auxiliary serving cell configure dedicated Radio Resource, in this message, carried sign, the UE context of target secondary Serving cell; Target secondary Serving cell configures after Radio Resource, by X2 interface, to base station, replys resource response message, carries the special-purpose parameters such as radio-resource-configuration in this resource response message, to allow UE to access this target secondary Serving cell.

It should be noted that, resource request message and resource response message can be the message (such as HANDOVER REQUEST and HANDOVER REQUEST ACKNOWLEDGE message) defining in existing X2 interface agreement, can be newly-increased message, the present invention be restricted yet.

S415, base station send the 3rd Indication message to UE, and the 3rd Indication message is used to indicate this UE target secondary Serving cell is added in the auxiliary serving cell set of this UE.

Base station is according to the carrier aggregation priority of at least one candidate's auxiliary serving cell, from this at least one candidate's auxiliary serving cell, determine that N-M candidate's assistant service community that carrier aggregation priority is the highest is as after UE target secondary Serving cell to be accessed, this base station sends the 3rd Indication message to UE, and the 3rd Indication message is used to indicate this UE target secondary Serving cell is added in the auxiliary serving cell set of this UE.

Optionally, the 3rd Indication message can reconfigure message for RRC connects.

S416, UE are added into target secondary Serving cell in the auxiliary serving cell set of this UE according to the 3rd Indication message.

Base station sends the 3rd Indication message to UE, and this UE is added into target secondary Serving cell in the auxiliary serving cell set of this UE according to the 3rd Indication message, so UE can carry out carrier aggregation transmission in target secondary Serving cell.

It should be noted that, the process of reshuffling of the switching of the main Serving cell in the embodiment of the present invention and auxiliary serving cell is the realization that can cooperatively interact, and can not be an independent process.

For example, after switch main Serving cell, base station indication UE will carry out reconfiguring of auxiliary serving cell, at UE, carry out after reconfiguring of auxiliary serving cell, base station can be according to the process of the interpolation of the replacement of above-mentioned auxiliary serving cell and auxiliary serving cell, indication UE carries out replacement or the interpolation of auxiliary serving cell, or not only replaces but also add.Identical with above-described embodiment of the replacement of concrete auxiliary serving cell or the process of interpolation.

Embodiments of the invention provide a kind of method of definite Target cell, in the mobility management process of UE, base station is according to every transmission performance parameter information of each candidate cell, calculate the carrier aggregation priority of each candidate cell, and the Target cell that UE is to be accessed, according to the carrier aggregation priority of this each candidate cell, is determined in this base station.By this scheme, reconfiguring in process of the switching of the main Serving cell in carrier aggregation system or auxiliary serving cell, base station basis is by the definite cell carrier polymerization priority of every transmission performance parameter of community, determine the Target cell that UE is to be accessed, thereby can improve the success rate of UE access Target cell, and guarantee the message transmission rate of UE.

Embodiment tri-

As shown in Figure 6, embodiments of the invention provide a kind of base station 1, and this base station 1 comprises:

Determining unit 10, the measurement report reporting for UE is determined at least one candidate cell.

Acquiring unit 11, for obtaining the transmission performance parameter of definite described at least one candidate cell of described determining unit 10.

Described determining unit 10, also for the transmission performance parameter of described at least one candidate cell of obtaining according to described acquiring unit 11, determines respectively the carrier aggregation priority of described at least one candidate cell.

Described determining unit 10 also, for according to the carrier aggregation priority of described at least one candidate cell, is determined described UE Target cell to be accessed from described at least one candidate cell.

Optionally, described acquiring unit 11, also for obtaining the transmission performance parameter of cell-of-origin, described cell-of-origin is currently to provide the community of service for described UE.

Described determining unit 10, also for the transmission performance parameter of the described cell-of-origin that obtains according to described acquiring unit 11, determines the carrier aggregation priority of described cell-of-origin.

Wherein, described determining unit 10, also for the carrier aggregation priority of at least one candidate cell described in described basis, determine UE Target cell to be accessed from described at least one candidate cell after, if the carrier aggregation priority of described Target cell is not less than the carrier aggregation priority of described cell-of-origin, determine that described UE accesses described Target cell; And if the carrier aggregation priority of described Target cell is lower than the carrier aggregation priority of described cell-of-origin, determines that described UE does not access described Target cell.

Optionally, described at least one candidate cell that described determining unit 10 is determined is the main Serving cell of at least one candidate, and the described Target cell that described determining unit 10 is determined is the main Serving cell of target.

Described acquiring unit 11, if the carrier aggregation priority of the described Target cell of also determining for described determining unit 10 is not less than the carrier aggregation priority of described cell-of-origin, after determining that described UE accesses described Target cell, obtain the polymerizing power information that described UE reports.

Described determining unit 10, also the described measurement report for obtaining according to described acquiring unit 11, determines at least one candidate's auxiliary serving cell, and the described polymerizing power information of obtaining according to described acquiring unit 11, determine the maximum polymerization carrier number N that described UE supports, wherein, N >=2.

Described acquiring unit 11, also for obtaining the transmission performance parameter of definite described at least one the candidate's auxiliary serving cell of described determining unit 10.

Described determining unit 10, also for the transmission performance parameter of described at least one candidate's auxiliary serving cell of obtaining according to described acquiring unit 11, determines respectively the carrier aggregation priority of described at least one candidate's auxiliary serving cell.

Described determining unit 10, also for according to the carrier aggregation priority of described at least one candidate's auxiliary serving cell, from described at least one candidate's auxiliary serving cell, determine that N-1 candidate's auxiliary serving cell that carrier aggregation priority is the highest is as described UE target secondary Serving cell to be accessed.

Optionally, described at least one candidate cell that described determining unit 10 is determined are at least one candidate's auxiliary serving cell.

Described acquiring unit 11, after also determining at least one candidate cell for the described measurement report reporting according to UE, described in obtain the transmission performance parameter of described at least one candidate cell before, obtain the polymerizing power information that described UE reports.

Described determining unit 10, also the described polymerizing power information for obtaining according to described acquiring unit 11, determines the maximum polymerization carrier number N that described UE supports, and determines the current polymerization carrier number M of described UE, wherein, M >=1, N >=2.

Described determining unit 10, if also for M < N, according to the carrier aggregation priority of described at least one candidate's auxiliary serving cell, from described at least one candidate's auxiliary serving cell, determine that N-M candidate's auxiliary serving cell that carrier aggregation priority is the highest is as described UE target secondary Serving cell to be accessed.

Optionally, the described transmission performance parameter that described acquiring unit 11 obtains comprises signal quality, user's face resource redundancy rate and dedicated random access resource redundancy rate, uplink interference value and the candidate cell of community and the main Serving cell parameter of whether standing altogether.

Embodiments of the invention provide a kind of base station, in the mobility management process of UE, base station is according to the parameter information of the every transmission performance of each candidate cell, calculate the carrier aggregation priority of each candidate cell, and the Target cell that UE is to be accessed, according to the carrier aggregation priority of this each candidate cell, is determined in this base station.By this scheme, reconfiguring in process of the switching of the main Serving cell in carrier aggregation system or auxiliary serving cell, base station is according to the carrier aggregation priority by the definite community of every transmission performance parameter of community, determine the Target cell that UE is to be accessed, thereby can improve the success rate of UE access Target cell, and guarantee the message transmission rate of UE.

Embodiment tetra-

As shown in Figure 7, embodiments of the invention provide a kind of base station, comprise: transmitter 12, receiver 13, processor 14 and memory 15, wherein, transmitter 12, receiver 13 and memory 15 are all connected with processor 14, for example, transmitter 12, receiver 13 and memory 15 can all be connected by bus with processor 14.

Receiver 13 and transmitter 12 can integrate, and form transceiver.

Memory 15 is for stores executable programs code, and this program code comprises computer-managed instruction.Memory 15 may comprise high-speed RAM memory, also may also comprise nonvolatile memory (non-volatile memory), for example at least one magnetic disc store.

Processor 14 can be a central processing unit, or specific integrated circuit, or is configured to implement one or more integrated circuits of the embodiment of the present invention.

Concrete, the measurement report that described processor 14 can be used for reporting according to UE is determined at least one candidate cell, and the transmission performance parameter of obtaining described at least one candidate cell, and according to the transmission performance parameter of described at least one candidate cell, determine respectively the carrier aggregation priority of described at least one candidate cell, and according to the carrier aggregation priority of described at least one candidate cell, from described at least one candidate cell, determine described UE Target cell to be accessed; Described transmitter 12 can be used for sending data; Described receiver 13 can be used for receiving data; Described memory 15 can be used for storing the software code of transmission performance parameter of at least one candidate cell and the software code of the carrier aggregation priority of at least one candidate cell and controls the software program that described base station completes said process, thereby make described processor 14 by carrying out above-mentioned software program and calling above-mentioned software code, complete said process.

Optionally, described processor 14, also for obtaining the transmission performance parameter of cell-of-origin, described cell-of-origin is current for described UE provides the community of service, and according to the transmission performance parameter of described cell-of-origin, determines the carrier aggregation priority of described cell-of-origin.

Wherein, described processor 14, also for the carrier aggregation priority of at least one candidate cell described in described basis, determine UE Target cell to be accessed from described at least one candidate cell after, if the carrier aggregation priority of described Target cell is not less than the carrier aggregation priority of described cell-of-origin, determine that described UE accesses described Target cell; And if the carrier aggregation priority of described Target cell is lower than the carrier aggregation priority of described cell-of-origin, determines that described UE does not access described Target cell.

Optionally, described at least one candidate cell that described processor 14 is determined is the main Serving cell of at least one candidate, and described Target cell is the main Serving cell of target.

Described receiver 13, if the carrier aggregation priority of the described Target cell of also determining for described processor 14 is not less than the carrier aggregation priority of described cell-of-origin, after determining that described UE accesses described Target cell, obtain the polymerizing power information that described UE reports.

Described processor 14, also, for according to described measurement report, determines at least one candidate's auxiliary serving cell, and the described polymerizing power information of obtaining according to described receiver 13, determines the maximum polymerization carrier number N that described UE supports, wherein, and N >=2.

Described processor 14, also for obtaining the transmission performance parameter of described at least one candidate's auxiliary serving cell; And according to the transmission performance parameter of described at least one candidate's auxiliary serving cell, determine respectively the carrier aggregation priority of described at least one candidate's auxiliary serving cell; And according to the carrier aggregation priority of described at least one candidate's auxiliary serving cell, from described at least one candidate's auxiliary serving cell, determine that N-1 candidate's auxiliary serving cell that carrier aggregation priority is the highest is as described UE target secondary Serving cell to be accessed.

Optionally, described at least one candidate cell that described processor 14 is determined are at least one candidate's auxiliary serving cell.

Described receiver 13, after the measurement report also reporting according to UE for described processor 14 is determined at least one candidate cell, described in obtain the transmission performance parameter of described at least one candidate cell before, obtain the polymerizing power information that described UE reports.

Described processor 14, also for and the described polymerizing power information obtained according to described receiver 13, determine the maximum polymerization carrier number N that described UE supports, and determine the current polymerization carrier number M of described UE, wherein, M >=1, N >=2; And, if M < is N, according to the carrier aggregation priority of described at least one candidate's auxiliary serving cell, from described at least one candidate's auxiliary serving cell, determine that N-M candidate's auxiliary serving cell that carrier aggregation priority is the highest is as described UE target secondary Serving cell to be accessed.

Optionally, the described transmission performance parameter that described processor 14 obtains comprises signal quality, user's face resource redundancy rate and dedicated random access resource redundancy rate, uplink interference value and the candidate cell of community and the main Serving cell parameter of whether standing altogether.

Embodiments of the invention provide a kind of base station, in the mobility management process of UE, base station is according to every transmission performance parameter information of each candidate cell, calculate the carrier aggregation priority of each candidate cell, and the Target cell that UE is to be accessed, according to the carrier aggregation priority of this each candidate cell, is determined in this base station.By this scheme, reconfiguring in process of the switching of the main Serving cell in carrier aggregation system or auxiliary serving cell, base station is according to the carrier aggregation priority by the definite community of every transmission performance parameter of community, determine the Target cell that UE is to be accessed, thereby can improve the success rate of UE access Target cell, and guarantee the message transmission rate of UE.

The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by the described protection range with claim.

Claims

1. a method for definite Target cell, is characterized in that, comprising:

2. the method for definite Target cell according to claim 1, is characterized in that, described method also comprises:

Obtain the transmission performance parameter of cell-of-origin, described cell-of-origin is currently to provide the community of service for described UE;

According to the transmission performance parameter of described cell-of-origin, determine the carrier aggregation priority of described cell-of-origin;

Wherein, the carrier aggregation priority of at least one candidate cell described in described basis, determine UE Target cell to be accessed from described at least one candidate cell after, described method also comprises:

If the carrier aggregation priority of described Target cell is not less than the carrier aggregation priority of described cell-of-origin, determine that described UE accesses described Target cell;

If the carrier aggregation priority of described Target cell lower than the carrier aggregation priority of described cell-of-origin, determines that described UE does not access described Target cell.

3. the method for definite Target cell according to claim 2, is characterized in that, described at least one candidate cell is the main Serving cell of at least one candidate, and described Target cell is the main Serving cell of target,

If the carrier aggregation priority of described Target cell is not less than the carrier aggregation priority of described cell-of-origin, after determining that described UE accesses described Target cell, described method also comprises:

Obtain the polymerizing power information that described UE reports;

According to described measurement report, determine at least one candidate's auxiliary serving cell, and according to described polymerizing power information, determine the maximum polymerization carrier number N that described UE supports, wherein, N >=2;

Obtain the transmission performance parameter of described at least one candidate's auxiliary serving cell;

According to the transmission performance parameter of described at least one candidate's auxiliary serving cell, determine respectively the carrier aggregation priority of described at least one candidate's auxiliary serving cell;

According to the carrier aggregation priority of described at least one candidate's auxiliary serving cell, from described at least one candidate's auxiliary serving cell, determine that N-1 candidate's auxiliary serving cell that carrier aggregation priority is the highest is as described UE target secondary Serving cell to be accessed.

4. the method for definite Target cell according to claim 1, is characterized in that, described at least one candidate cell is at least one candidate's auxiliary serving cell,

After the described measurement report reporting according to UE is determined at least one candidate cell, described in obtain the transmission performance parameter of described at least one candidate cell before, described method also comprises:

Obtain the polymerizing power information that described UE reports;

According to described polymerizing power information, determine the maximum polymerization carrier number N that described UE supports, and determine the current polymerization carrier number M of described UE, wherein, M >=1, N >=2;

If M < is N, the carrier aggregation priority of at least one candidate cell described in described basis is determined UE Target cell to be accessed from described at least one candidate cell, comprising:

According to the carrier aggregation priority of described at least one candidate's auxiliary serving cell, from described at least one candidate's auxiliary serving cell, determine that N-M candidate's auxiliary serving cell that carrier aggregation priority is the highest is as described UE target secondary Serving cell to be accessed.

5. according to the method for the community that really sets the goal described in claim 1-4 any one, it is characterized in that,

Described transmission performance parameter comprises signal quality, user's face resource redundancy rate and dedicated random access resource redundancy rate, uplink interference value and the candidate cell of community and the main Serving cell parameter of whether standing altogether.

6. a base station, is characterized in that, comprising:

7. base station according to claim 6, is characterized in that,

Described acquiring unit, also for obtaining the transmission performance parameter of cell-of-origin, described cell-of-origin is currently to provide the community of service for described UE;

Described determining unit, also for the transmission performance parameter of the described cell-of-origin that obtains according to described acquiring unit, determines the carrier aggregation priority of described cell-of-origin;

Wherein, described determining unit, also for the carrier aggregation priority of at least one candidate cell described in described basis, determine UE Target cell to be accessed from described at least one candidate cell after, if the carrier aggregation priority of described Target cell is not less than the carrier aggregation priority of described cell-of-origin, determine that described UE accesses described Target cell; And if the carrier aggregation priority of described Target cell is lower than the carrier aggregation priority of described cell-of-origin, determines that described UE does not access described Target cell.

8. base station according to claim 7, is characterized in that, described at least one candidate cell that described determining unit is determined is the main Serving cell of at least one candidate, and the described Target cell that described determining unit is determined is the main Serving cell of target,

Described acquiring unit, if the carrier aggregation priority of the described Target cell of also determining for described determining unit is not less than the carrier aggregation priority of described cell-of-origin, after determining that described UE accesses described Target cell, obtain the polymerizing power information that described UE reports;

Described determining unit, also the described measurement report for obtaining according to described acquiring unit, determines at least one candidate's auxiliary serving cell, and the described polymerizing power information of obtaining according to described acquiring unit, determine the maximum polymerization carrier number N that described UE supports, wherein, N >=2;

Described acquiring unit, also for obtaining the transmission performance parameter of definite described at least one the candidate's auxiliary serving cell of described determining unit;

Described determining unit, also for the transmission performance parameter of described at least one candidate's auxiliary serving cell of obtaining according to described acquiring unit, determines respectively the carrier aggregation priority of described at least one candidate's auxiliary serving cell;

Described determining unit, also for according to the carrier aggregation priority of described at least one candidate's auxiliary serving cell, from described at least one candidate's auxiliary serving cell, determine that N-1 candidate's auxiliary serving cell that carrier aggregation priority is the highest is as described UE target secondary Serving cell to be accessed.

9. base station according to claim 6, is characterized in that, described at least one candidate cell that described determining unit is determined is at least one candidate's auxiliary serving cell,

Described acquiring unit, after also determining at least one candidate cell for the described measurement report reporting according to UE, described in obtain the transmission performance parameter of described at least one candidate cell before, obtain the polymerizing power information that described UE reports;

Described determining unit, also the described polymerizing power information for obtaining according to described acquiring unit, determines the maximum polymerization carrier number N that described UE supports, and determines the current polymerization carrier number M of described UE, wherein, M >=1, N >=2;

Described determining unit, if also for M < N, according to the carrier aggregation priority of described at least one candidate's auxiliary serving cell, from described at least one candidate's auxiliary serving cell, determine that N-M candidate's auxiliary serving cell that carrier aggregation priority is the highest is as described UE target secondary Serving cell to be accessed.

10. according to the base station described in claim 6-9, it is characterized in that,

The described transmission performance parameter that described acquiring unit obtains comprises signal quality, user's face resource redundancy rate and dedicated random access resource redundancy rate, uplink interference value and the candidate cell of community and the main Serving cell parameter of whether standing altogether.