CN102045780A - Method and system for negotiating mobility parameter in LTE mobile communication system - Google Patents
Method and system for negotiating mobility parameter in LTE mobile communication system Download PDFInfo
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- CN102045780A CN102045780A CN2009102060379A CN200910206037A CN102045780A CN 102045780 A CN102045780 A CN 102045780A CN 2009102060379 A CN2009102060379 A CN 2009102060379A CN 200910206037 A CN200910206037 A CN 200910206037A CN 102045780 A CN102045780 A CN 102045780A
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Abstract
The invention discloses a method and a system for negotiating a mobility parameter in a long-term evolution (LTE) mobile communication system, which are used for improving network performance. The method comprises the following steps that: a source base station sends a mobility parameter adjustment negotiation request message to a target base station to initiate mobility parameter adjustment negotiation; and the target base station judges whether to accept the mobility parameter adjustment negotiation or not, if so, the target base station feeds a mobility parameter adjustment negotiation response message to the source base station, and the source base station finishes mobility parameter adjustment according to the mobility parameter adjustment negotiation response message, and otherwise, the target base station returns a mobility parameter adjustment negotiation failure message to the source base station. Through the technical scheme, the specific mobility parameter can be optimized, the waste of network resources is reduced, and the network performance is improved so as to realize the self-optimizing function of a network.
Description
Technical field
The present invention relates to Long Term Evolution (LTE) mobile communication system, relate in particular to mobility parameter consultation method and system in the LTE mobile communication system.
Background technology
Long Term Evolution (Long Term Evolution, LTE) network by the general continental rise wireless access network of evolution (Evolved UTRAN, E-UTRAN) base station (Evolved NodeB, eNB) and evolution packet switching center (Evolved Packet Core, EPC) form the network flattening.Wherein E-UTRAN comprises the set of the eNB that is connected by the S1 interface with EPC, can connect by X2 interface between the eNB.S1, X2 are logic interfacing.An EPC can manage one or more eNB, and an eNB also can be controlled by one or more EPC, and an eNB can manage one or more sub-districts.
MANET (SON) is a kind of technology of carrying out network configuration and optimization automatically.The characteristics of this technology are the self-configuring self-optimizings, this technology is used in LTE and is made that LTE base station (eNB) can be according to the automatic configuration network parameter of certain measurement, and carry out Automatic Optimal according to network change, thus keep the network performance optimum, saved lot of manpower and material resources.
For the self-optimization of switching parameter of LTE system, need according to switching relevant measurement, optimize the sub-district gravity treatment and switch relevant parameter according to certain algorithm, according to the operation conditions of network to improve the performance of network.The switching here is meant the switching of LTE internal system and the switching between system, switching between system refers to general continental rise wireless access network (Universal Terrestrial Radio Access Network, UTRAN) or global system for mobile communications (Global System For Mobile Communication, GSM) or code division multiple access (Code Division Multiple Access, the CDMA) switching of system.Equally, also can be used for the load balancing of minizone for the self-optimizing of handoff parameter, optimization by sub-district gravity treatment and handoff parameter can solve the inhomogeneous of traffic load, and make to realizing switching that load balancing is carried out and redirected number of times minimum, compare the capacity that sub-district gravity treatment static or that do not have self-optimizing and handoff parameter can also improve system.
When adjusting the handoff parameter of this sub-district, need to consider the handoff parameter configuration of relevant adjacent area, the adjustment meeting of some handoff parameter is to the switching behavior generation very big influence of UE to the adjacent area, cell individual offsets (Cell Individual Offset for example, CIO), frequency shift (FS) (frequency specific offset) and sluggish (Hysteresis) parameter, can be triggered to UE to specific abutting subdistrict or all of its neighbor sub-district too early and the switching in evening excessively.Under a lot of scenes, the handoff parameter of a sub-district is adjusted, and its relevant adjacent area also will be adjusted accordingly.
Do not consider the handoff parameter configuration of relevant abutting subdistrict if the handoff parameter configuration of this sub-district is only considered in the adjustment of the handoff parameter of a sub-district, so just may produce inappropriate handoff parameter, thereby can cause table tennis to switch.As shown in Figure 1, UE rattles between the Cell a of the sub-district of eNB B (Cell) b and Enb A and switches shown in the schematic diagram, UE switching because the inappropriate handoff parameter between Cell b and Cell a can be rattled between sub-district Cell b and Cell a.The mechanism that existing a kind of handoff parameter is consulted is used for the adjustment process of handoff parameter, when Cell a adjusts Cell a to the handoff parameter of Cell b switching, source base station under the Cell a must be held consultation with base station under the adjacency Cell b, if the base station, opposite end is agreed, then return and consult to confirm, if base station, opposite end refusal is then taken back a handoff parameter and is adjusted reference value and a suitable cause value.Source base station receives that handoff parameter negotiation acknowledge message is then with new handoff parameter configuration take-effective; Receive handoff parameter negotiation refuse information, then do not use new handoff parameter.Again initiate negotiations process next time.
For the parameter adjustment of sub-district gravity treatment, also be to adopt same negotiation mode.The parameter of sub-district gravity treatment mainly comprises the biasing (Qoffset between Serving cell and the abutting subdistrict
S, n) and the frequency offset (Qoffset of same frequency priority
Frequency), the hysteresis (Q of ranking compositor in the time of can also comprising gravity treatment
Hyst).
In realizing process of the present invention, the inventor finds above-mentioned machinery of consultation, and there are the following problems at least:
The response message that returns when the base station, opposite end can cause entry-into-force time of parameter adjustment of this sub-district and sub-district, opposite end inconsistent too late, and perhaps this sub-district may not need to adjust parameter again and the parameter of sub-district, opposite end has come into force, thereby causes the mobility performance decrease.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of Long Term Evolution mobile communication system mobility parameter consultation method and system, to improve network performance.
In order to solve the problems of the technologies described above, the invention provides a kind of Long Term Evolution mobile communication system mobility parameter consultation method, be used for the negotiation that Serving cell and abutting subdistrict carry out the mobility parameter, comprising:
Source base station sends mobility parameter adjustment negotiation request message to target BS, initiates the mobility parameter adjustment to described target BS and consults;
After described target BS is received described mobility parameter adjustment negotiation request message, judge whether to accept described mobility parameter adjustment and consult;
Described target BS is accepted described mobility parameter adjustment and is consulted, and then to described source base station feedback mobility parameter adjustment negotiate response message, described source base station is finished the mobility parameter adjustment according to described mobility parameter adjustment negotiate response message;
Described target BS is not accepted described mobility parameter adjustment and is consulted, and then returns the mobility parameter adjustment to described source base station and consults failed message, and expression is not accepted described mobility parameter adjustment and consulted.
Preferably, described mobility parameter negotiation comprises handover negotiation optimization or the sub-district gravity treatment negotiation of described Serving cell to described abutting subdistrict;
Wherein, when described mobility parameter negotiation was described handover negotiation optimization, described mobility parameter was a handoff parameter; When described mobility parameter negotiation was the gravity treatment negotiation of described sub-district, described mobility parameter was a cell reselection parameters.
Preferably, described mobility parameter adjustment negotiation request message is carried the moving parameter value request of described Serving cell to described abutting subdistrict; Described mobility parameter adjustment negotiate response message is carried the mobility parameter response value of described abutting subdistrict to described Serving cell.
Preferably, described mobility parameter adjustment negotiation request message is further carried the mobility parameter adjustment entry-into-force time of described Serving cell to described abutting subdistrict.
Preferably, described target BS in the mobility parameter adjustment entry-into-force time of described abutting subdistrict or come into force constantly, is adjusted into the mobility parameter response value that described abutting subdistrict arrives described Serving cell with described abutting subdistrict to the mobility parameter value of described Serving cell at described Serving cell.
Preferably, after described source base station is received described mobility parameter adjustment negotiate response message, indicate described target BS to adopt the mobility parameter response value of described abutting subdistrict to described Serving cell.
Preferably, failed message is consulted in described mobility parameter adjustment, carries described abutting subdistrict and arrives the mobility parameter currency of described Serving cell and/or the mobility parameter adjustment scope that acceptable described abutting subdistrict arrives described Serving cell;
Described source base station is received described mobility parameter adjustment negotiation failed message, arrive the mobility parameter currency of described Serving cell and/or the mobility parameter adjustment scope that acceptable described abutting subdistrict arrives described Serving cell according to described abutting subdistrict, judge whether to initiate again the mobility parameter adjustment and consult.
Preferably, failed message is consulted in described mobility parameter adjustment, carries stand-by period or the acceptable described Serving cell mobility parameter adjustment scope to described abutting subdistrict;
Described source base station is received described mobility parameter adjustment negotiation failed message, at least initiate described mobility parameter adjustment after waiting for the described stand-by period again and consult, perhaps judge whether to initiate again mobility parameter adjustment negotiation to the mobility parameter adjustment scope of described abutting subdistrict according to described Serving cell.
Preferably, described mobility parameter adjustment negotiation request message is carried the moving parameter value request of described Serving cell to described abutting subdistrict; Described mobility parameter adjustment negotiate response message is carried the mobility parameter adjustment scope of described Serving cell to described abutting subdistrict;
Wherein, after described source base station is received described mobility parameter adjustment negotiate response message, determine the mobility parameter adjustment value of described Serving cell according to described Serving cell to the mobility parameter adjustment scope of described abutting subdistrict, and indicate described target BS to adjust the mobility parameter of described abutting subdistrict to the mobility parameter adjustment value of described abutting subdistrict to described Serving cell according to described Serving cell to described abutting subdistrict.
Preferably, described mobility parameter adjustment negotiation request message and mobility parameter adjustment negotiate response message are finished transmission by X2 interface or S1 interface.
In order to solve the problems of the technologies described above, the present invention also provides a kind of Long Term Evolution mobile communication system mobility parameter negotiation system, is used for the negotiation that Serving cell and abutting subdistrict carry out the mobility parameter, comprises source base station and target BS, wherein:
Described source base station is used for sending mobility parameter adjustment negotiation request message to described target BS and consults to initiate the mobility parameter adjustment; And the mobility parameter adjustment negotiate response message of feedback when receiving described target BS and accepting described mobility parameter adjustment and consult;
Described target BS, after being used to receive described mobility parameter adjustment negotiation request message, judging whether to accept described mobility parameter adjustment consults, accept then to feed back described mobility parameter adjustment negotiate response message, do not accept the mobility parameter adjustment negotiation failed message that described mobility parameter adjustment is consulted otherwise return expression to described source base station to described source base station.
Preferably, between described source base station and the described target BS, transmit described mobility parameter adjustment negotiation request message and mobility parameter adjustment negotiate response message by X2 interface or S1 interface.
Mobility parameter adjustment negotiations process among the present invention, when consulting successfully, can return the mobility parameter of opposite end, when consulting failure, return the mobility parameter and the acceptable adjusting range of opposite end,, simplified the process of consulting as the reference that next negotiations process is initiated.Based on technical solution of the present invention, can concrete mobility parameter be optimized, reduced waste of network resources, improve network performance, thereby realized the self-optimization function of network.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in specification, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is that UE rattles between Cell b and Cell a and switches schematic diagram in the prior art;
Fig. 2 is the schematic flow sheet of mobility parameter consultation method first embodiment of the present invention;
Signalling diagram when Fig. 3 accepts this mobility parameter negotiation for target BS in embodiment illustrated in fig. 2;
Signalling diagram when Fig. 4 does not accept this mobility parameter negotiation for target BS in embodiment illustrated in fig. 2;
Fig. 5 finishes the schematic diagram of mobility parameter adjustment process for the indication that comes into force by adjustment;
Fig. 6 is the schematic flow sheet of mobility parameter consultation method second embodiment of the present invention;
Fig. 7 is signaling process figure embodiment illustrated in fig. 6.
Embodiment
Describe embodiments of the present invention in detail below with reference to drawings and Examples, how the application technology means solve technical problem to the present invention whereby, and the implementation procedure of reaching technique effect can fully understand and implements according to this.
Need to prove that if do not conflict, each feature among the embodiment of the invention and the embodiment can mutually combine, all within protection scope of the present invention.In addition, can in computer system, carry out in the step shown in the flow chart of accompanying drawing such as a set of computer-executable instructions, and, though there is shown logical order in flow process, but in some cases, can carry out step shown or that describe with the order that is different from herein.
Fig. 2 is the schematic flow sheet of mobility parameter consultation method first embodiment of the present invention, Fig. 3 be embodiment illustrated in fig. 2 in, signalling diagram when target BS is accepted this mobility parameter negotiation, Fig. 4 be embodiment illustrated in fig. 2 in, the signalling diagram when target BS is not accepted this mobility parameter negotiation.In conjunction with Fig. 3 and signalling diagram shown in Figure 4, embodiment shown in Figure 2 mainly comprises the steps:
Step S210, source base station is according to the optimization demand of mobility robustness or the optimization demand of load balancing, the mobility parameter of the abutting subdistrict that Serving cell has jurisdiction over to target BS is adjusted in decision, and generate the mobility parameter request value of Serving cell to abutting subdistrict according to the adjustment demand, perhaps according to the mobility parameter adjustment value of Serving cell to the mobility parameter currency of abutting subdistrict and adjustment demand generation Serving cell to abutting subdistrict;
Wherein, the mobility parameter configuration result of this Serving cell to the desired adjusted Serving cell of the mobility parameter request value representation Serving cell of abutting subdistrict to abutting subdistrict, this Serving cell is that Serving cell is to the current mobility parameter value that is using of abutting subdistrict to the mobility parameter currency of abutting subdistrict; This Serving cell is the variable quantity of this mobility parameter objectives value based on this mobility parameter currency to the mobility parameter adjustment value of abutting subdistrict;
Step S220, source base station sends mobility parameter adjustment negotiation request message to target BS, to initiate mobility parameter adjustment negotiations process to target BS;
Source base station carries the mobility parameter request value of Serving cell to abutting subdistrict in mobility parameter adjustment negotiation request message, carry the mobility parameter adjustment entry-into-force time of Serving cell to abutting subdistrict simultaneously;
Wherein, this mobility parameter request value can be the mobility parameter objectives value of Serving cell to abutting subdistrict, the mobility parameter adjustment value that also can be Serving cell to the mobility parameter currency of abutting subdistrict and Serving cell to abutting subdistrict;
Wherein, this Serving cell mobility parameter value of being desired its of Serving cell desire will be used after the abutting subdistrict adjustment to the mobility parameter objectives value of abutting subdistrict;
Step S230, target BS judges whether to accept this mobility parameter negotiation after receiving this mobility parameter adjustment negotiation request message, that is to say not accept this mobility parameter request value, if can accept then change step S240, if do not accept then change step S290; Present embodiment is that target BS can be accepted this mobility parameter adjustment negotiation request message;
Step S240, target BS is according to the mobility parameter request value of this Serving cell to abutting subdistrict, judge whether to need to adjust the mobility parameter currency of the current abutting subdistrict that is using, adjust if desired and then change step S250, otherwise change step S260 to Serving cell;
Step S250, target BS is to source base station feedback mobility parameter adjustment negotiate response message, and this mobility parameter adjustment negotiate response message is carried the mobility parameter response value of abutting subdistrict to Serving cell; Change step S270 then;
Wherein, this abutting subdistrict comprises the mobility parameter objectives value of abutting subdistrict to Serving cell to the mobility parameter response value of Serving cell, perhaps the mobility parameter adjustment value of abutting subdistrict to the mobility parameter currency of Serving cell and abutting subdistrict to Serving cell;
Wherein, the mobility parameter value that this abutting subdistrict is desired its of abutting subdistrict desire will be used after the Serving cell adjustment to the mobility parameter objectives value of Serving cell, this abutting subdistrict is that abutting subdistrict is to the current mobility parameter value that is using of Serving cell to the mobility parameter currency of Serving cell, this abutting subdistrict is to the mobility parameter adjustment value of Serving cell, is this abutting subdistrict to the mobility parameter objectives value of Serving cell based on the variable quantity of this abutting subdistrict to the mobility parameter currency of Serving cell;
Step S260, target BS is to source base station feedback mobility parameter adjustment negotiate response message, this mobility parameter adjustment negotiate response message is carried the mobility parameter response value of abutting subdistrict to Serving cell, perhaps do not carry the mobility parameter response value of this abutting subdistrict to Serving cell, when not carrying the mobility parameter response value of this abutting subdistrict to Serving cell, the current mobility parameter of using is adopted in expression; Change step S270 then;
Wherein, this abutting subdistrict is the mobility parameter currency of abutting subdistrict to Serving cell to the mobility parameter response value of Serving cell;
Step S270, target BS at this Serving cell in the mobility parameter adjustment entry-into-force time of abutting subdistrict, abutting subdistrict is adjusted into the mobility parameter response value of this abutting subdistrict to Serving cell to the mobility parameter value of Serving cell, wherein comprises any time (comprising coming into force at the last moment of entry-into-force time) in the entry-into-force time opportunity of Tiao Zhenging; Change step S280;
Step S280, after this source base station is received the mobility parameter adjustment negotiate response message of this target BS feedback, at this Serving cell in the mobility parameter adjustment entry-into-force time of abutting subdistrict, Serving cell is adjusted into the mobility parameter-configuring request value of this Serving cell to abutting subdistrict to the mobility parameter value of abutting subdistrict, wherein comprise any time of entry-into-force time the opportunity of Tiao Zhenging, finish.
Step S290, target BS returns the mobility parameter adjustment to source base station and consults failed message, represents not accept the mobility parameter adjustment negotiations process that source base station is initiated to source base station; Finish.
Wherein, target BS can consult to carry in failed message the mobility parameter adjustment scope of abutting subdistrict to the mobility parameter currency of Serving cell and/or acceptable abutting subdistrict to Serving cell in this mobility parameter adjustment, also can carry the mobility parameter adjustment scope of abutting subdistrict to the mobility parameter currency of Serving cell and/or acceptable Serving cell to abutting subdistrict; The mobility parameter adjustment scope of this acceptable abutting subdistrict wherein to the mobility parameter adjustment scope of Serving cell and acceptable Serving cell to abutting subdistrict, can and safeguard according to operational management (Operations Administration And Maintenance, OAM) configuration or other optimization scene provide; Source base station is after receiving that failed message is consulted in this mobility parameter adjustment, according to wherein abutting subdistrict to the mobility parameter currency of Serving cell and/or acceptable abutting subdistrict to the mobility parameter adjustment scope of Serving cell, judge whether to return step S210 and initiate mobility parameter adjustment negotiations process again.
Wherein, step S280 and step S270 do not have strict sequencing on the time of implementation.
In other embodiments, also can not carry the mobility parameter adjustment entry-into-force time of this Serving cell in this mobility parameter adjustment negotiation request message to abutting subdistrict.Fig. 5 is the embodiment schematic diagram that carries out the mobility parameter adjustment by Indication message.As shown in Figure 5, in this case, source base station sends mobility parameter adjustment negotiation request message (step S510) to target BS, and the mobility parameter adjustment negotiate response message (step S520) of receiving target BS feedback afterwards, send the mobility parameter adjustment Indication message (step S530) that comes into force to target BS, indicate this target BS to adopt the mobility parameter response value of abutting subdistrict to Serving cell; Target BS adopts the mobility parameter response value of abutting subdistrict to Serving cell receiving that this mobility parameter adjustment comes into force behind the Indication message.
In other embodiments, when target BS returned mobility parameter adjustment negotiation failed message to source base station, this mobility parameter adjustment was consulted can carry the stand-by period in failed message; Source base station after waiting for waiting time at least, can return step S210 and continue to carry out after receiving that failed message is consulted in this mobility parameter adjustment.
In other another embodiment, when target BS returned mobility parameter adjustment negotiation failed message to source base station, this mobility parameter adjustment was consulted can carry the mobility parameter currency of abutting subdistrict to Serving cell in failed message; After source base station receives that failed message is consulted in this mobility parameter adjustment, judge whether to initiate again mobility parameter adjustment negotiations process to the mobility parameter currency of Serving cell according to wherein abutting subdistrict.
Go back among the embodiment at other, when target BS returns mobility parameter adjustment negotiation failed message to source base station, this mobility parameter adjustment is consulted can carry the mobility parameter adjustment scope of the acceptable Serving cell of acceptable target BS to abutting subdistrict in the failed message, and this acceptable Serving cell can be to provide with safeguarding (OAM) configuration or other algorithm according to operational management to the mobility parameter adjustment scope of abutting subdistrict; Source base station judges whether to return step S210 and initiates mobility parameter adjustment negotiations process again according to the mobility parameter adjustment scope of this acceptable Serving cell to abutting subdistrict.
Fig. 6 is the schematic flow sheet of mobility parameter consultation method second embodiment of the present invention, and Fig. 7 is signaling process figure embodiment illustrated in fig. 6.In conjunction with signaling process figure shown in Figure 7, shown in Figure 6 this second embodiment mainly comprises the steps:
Step S610, source base station is according to the optimization demand of mobility robustness or the optimization demand of load balancing, the mobility parameter of the abutting subdistrict that Serving cell has jurisdiction over to target BS is adjusted in decision, and generate the mobility parameter request value of Serving cell to abutting subdistrict according to the adjustment demand, perhaps according to the mobility parameter adjustment value of Serving cell to the mobility parameter currency of abutting subdistrict and adjustment demand generation Serving cell to abutting subdistrict;
Wherein, the desired adjusted Serving cell of this mobility parameter request value representation Serving cell is to the mobility parameter configuration result of abutting subdistrict, and this Serving cell is that Serving cell is to the current mobility parameter value that is using of abutting subdistrict to the mobility parameter currency of abutting subdistrict; This Serving cell is the variable quantity of this mobility parameter objectives value based on this mobility parameter currency to the mobility parameter adjustment value of abutting subdistrict;
Step S620, source base station sends mobility parameter adjustment negotiation request message to target BS, to initiate mobility parameter adjustment negotiations process to target BS;
Source base station carries the mobility parameter request value of Serving cell to abutting subdistrict in mobility parameter adjustment negotiation request message;
Wherein, this mobility parameter request value can be the mobility parameter objectives value of Serving cell to abutting subdistrict, the mobility parameter adjustment value that also can be Serving cell to the mobility parameter currency of abutting subdistrict and Serving cell to abutting subdistrict;
After step S630, target BS receive this mobility parameter adjustment negotiation request message, obtain the mobility parameter adjustment scope of acceptable Serving cell to the mobility parameter request value of abutting subdistrict to abutting subdistrict according to this Serving cell;
Step S640, target BS carries the mobility parameter adjustment scope of this acceptable Serving cell to abutting subdistrict to this source base station feedback mobility parameter adjustment negotiate response message in this mobility parameter adjustment negotiate response message;
Step S650, source base station receive this mobility parameter adjustment negotiate response message, according to wherein this acceptable Serving cell mobility parameter adjustment scope to abutting subdistrict, judge and can carry out the mobility parameter adjustment, then change step S660; Do not carry out adjusting then keep current mobility parameter constant if judge;
Step S660, source base station is determined the mobility parameter adjustment value of Serving cell to abutting subdistrict according to this acceptable Serving cell to the mobility parameter area of abutting subdistrict;
Step S670, source base station sends mobility parameter adjustment Indication message to this target BS, indicates this target BS to finish the mobility parameter adjustment; Wherein carry the mobility parameter adjustment value of Serving cell in this mobility parameter adjustment Indication message to abutting subdistrict;
After step S680, target BS receive this mobility parameter adjustment Indication message, adjust the mobility parameter of abutting subdistrict to the mobility parameter adjustment value correspondence of abutting subdistrict to Serving cell according to Serving cell wherein.
Need to prove that source base station may have been initiated negotiations process to a plurality of target BS, has received a plurality of negotiate response, source base station may be only can be consulted once more to several objects base station wherein, and sends mobility parameter adjustment Indication message.
Among aforementioned first and second embodiment, mobility parameter adjustment negotiations process can be used for consulting handoff parameter and cell reselection parameters.When mobility parameter adjustment negotiations process only was used for consulting handoff parameter, mobility parameter wherein was exactly a handoff parameter; When mobility parameter adjustment negotiations process only was used for consulting cell reselection parameters, mobility parameter wherein was exactly a cell reselection parameters.Wherein Serving cell is to the handoff parameter of abutting subdistrict, be meant the decision parameter of Serving cell to the handover event of abutting subdistrict, contain the cell individual offsets (CIO) and the frequency shift (FS) (frequency specific offset) of abutting subdistrict, further also can contain sluggishness (Hysteresis) parameter of mobility event etc.In like manner, abutting subdistrict is corresponding to the handoff parameter of Serving cell.A3 incident for example:
The parametric description of A3 incident is as follows:
Mn+Ofn+Ocn-Hys＞Ms+Ofs+Ocs+Off
Wherein:
Mn is the measurement result of abutting subdistrict;
Ofn is the frequency shift (FS) of abutting subdistrict;
Ocn is the cell individual offsets of abutting subdistrict;
Hys is the sluggish parameter of A3 incident;
Ms is the measurement result of Serving cell;
Ofs is the Serving cell frequency shift (FS);
Ocs is the cell individual offsets of Serving cell;
Off is the offset parameter of A3 incident.
Cell reselection parameters mainly comprises the biasing (Qoffset of Serving cell and neighboring interval
S, n) and the frequency offset (Qoffset of same frequency priority
Frequency), further, the hysteresis (Q of ranking compositor in the time of can also comprising gravity treatment
Hyst).In like manner, abutting subdistrict is corresponding to the cell reselection parameters of Serving cell.Mobility parameter adjustment value is meant the change value of the total biasing in the handover event judgement of Serving cell and adjacent area, perhaps is meant the change value of total biasing of Serving cell in the gravity treatment judgement of sub-district and adjacent area.
Message in the technical solution of the present invention mobility parameter adjustment negotiations process, it can be the independent message of X2 interface, it also can be the independent message of S1 interface, can also be existing message in other prior aries, also promptly by waiting the interactive information of transmitting in the mobility parameter-negotiation procedure such as base station configuration message transfer (eNB CONFIGURATION TRANSFER) and mobile management unit configuration message transfer (MME CONFIGURATION TRANSFER).
Further, the Serving cell that source base station is had jurisdiction over can be by certain incident, such as carrying out the incidents such as mobility parameter adjustment that load balancing optimization or mobility optimization cause to the mobility parameter adjustment negotiations process of the abutting subdistrict of having jurisdiction over of target BS.
Mobility parameter adjustment in the technical solution of the present invention is consulted, and realizes by the interacting message between the base station.Exist between the base station under the situation of X2 interface, can come mutual by the interface message of X2 interface; Do not exist between the base station under the situation of X2 interface, can come mutual by the interface message of S1 interface.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
Though the disclosed execution mode of the present invention as above, the execution mode that described content just adopts for the ease of understanding the present invention is not in order to limit the present invention.Technical staff in any the technical field of the invention; under the prerequisite that does not break away from the disclosed spirit and scope of the present invention; can do any adjustment and variation what implement in form and on the details; but scope of patent protection of the present invention still must be as the criterion with the scope that appending claims was defined.
Claims (12)
1. a Long Term Evolution mobile communication system mobility parameter consultation method is used for the negotiation that Serving cell and abutting subdistrict carry out the mobility parameter, it is characterized in that this method comprises:
Source base station sends mobility parameter adjustment negotiation request message to target BS, initiates the mobility parameter adjustment to described target BS and consults;
After described target BS is received described mobility parameter adjustment negotiation request message, judge whether to accept described mobility parameter adjustment and consult;
Described target BS is accepted described mobility parameter adjustment and is consulted, and then to described source base station feedback mobility parameter adjustment negotiate response message, described source base station is finished the mobility parameter adjustment according to described mobility parameter adjustment negotiate response message;
Described target BS is not accepted described mobility parameter adjustment and is consulted, and then returns the mobility parameter adjustment to described source base station and consults failed message, and expression is not accepted described mobility parameter adjustment and consulted.
2. the method for claim 1 is characterized in that:
Described mobility parameter negotiation comprises handover negotiation optimization or the sub-district gravity treatment negotiation of described Serving cell to described abutting subdistrict;
Wherein, when described mobility parameter negotiation was described handover negotiation optimization, described mobility parameter was a handoff parameter; When described mobility parameter negotiation was the gravity treatment negotiation of described sub-district, described mobility parameter was a cell reselection parameters.
3. the method for claim 1 is characterized in that:
Described mobility parameter adjustment negotiation request message is carried the moving parameter value request of described Serving cell to described abutting subdistrict;
Described mobility parameter adjustment negotiate response message is carried the mobility parameter response value of described abutting subdistrict to described Serving cell.
4. method as claimed in claim 3 is characterized in that:
Described mobility parameter adjustment negotiation request message is further carried the mobility parameter adjustment entry-into-force time of described Serving cell to described abutting subdistrict.
5. method as claimed in claim 4 is characterized in that:
Described target BS in the mobility parameter adjustment entry-into-force time of described abutting subdistrict or come into force constantly, is adjusted into the mobility parameter response value that described abutting subdistrict arrives described Serving cell with described abutting subdistrict to the mobility parameter value of described Serving cell at described Serving cell.
6. method as claimed in claim 3 is characterized in that:
After described source base station is received described mobility parameter adjustment negotiate response message, indicate described target BS to adopt the mobility parameter response value of described abutting subdistrict to described Serving cell.
7. method as claimed in claim 3 is characterized in that:
Failed message is consulted in described mobility parameter adjustment, carries described abutting subdistrict and arrives the mobility parameter currency of described Serving cell and/or the mobility parameter adjustment scope that acceptable described abutting subdistrict arrives described Serving cell;
Described source base station is received described mobility parameter adjustment negotiation failed message, arrive the mobility parameter currency of described Serving cell and/or the mobility parameter adjustment scope that acceptable described abutting subdistrict arrives described Serving cell according to described abutting subdistrict, judge whether to initiate again the mobility parameter adjustment and consult.
8. method as claimed in claim 3 is characterized in that:
Failed message is consulted in described mobility parameter adjustment, carries stand-by period or the acceptable described Serving cell mobility parameter adjustment scope to described abutting subdistrict;
Described source base station is received described mobility parameter adjustment negotiation failed message, at least initiate described mobility parameter adjustment after waiting for the described stand-by period again and consult, perhaps judge whether to initiate again mobility parameter adjustment negotiation to the mobility parameter adjustment scope of described abutting subdistrict according to described Serving cell.
9. the method for claim 1 is characterized in that:
Described mobility parameter adjustment negotiation request message is carried the moving parameter value request of described Serving cell to described abutting subdistrict;
Described mobility parameter adjustment negotiate response message is carried the mobility parameter adjustment scope of described Serving cell to described abutting subdistrict;
Wherein, after described source base station is received described mobility parameter adjustment negotiate response message, determine the mobility parameter adjustment value of described Serving cell according to described Serving cell to the mobility parameter adjustment scope of described abutting subdistrict, and indicate described target BS to adjust the mobility parameter of described abutting subdistrict to the mobility parameter adjustment value of described abutting subdistrict to described Serving cell according to described Serving cell to described abutting subdistrict.
10. the method for claim 1 is characterized in that:
Described mobility parameter adjustment negotiation request message and mobility parameter adjustment negotiate response message are finished transmission by X2 interface or S1 interface.
11. a Long Term Evolution mobile communication system mobility parameter negotiation system is used for the negotiation that Serving cell and abutting subdistrict carry out the mobility parameter, comprises source base station and target BS, it is characterized in that:
Described source base station is used for sending mobility parameter adjustment negotiation request message to described target BS and consults to initiate the mobility parameter adjustment; And the mobility parameter adjustment negotiate response message of feedback when receiving described target BS and accepting described mobility parameter adjustment and consult;
Described target BS, after being used to receive described mobility parameter adjustment negotiation request message, judging whether to accept described mobility parameter adjustment consults, accept then to feed back described mobility parameter adjustment negotiate response message, do not accept the mobility parameter adjustment negotiation failed message that described mobility parameter adjustment is consulted otherwise return expression to described source base station to described source base station.
12. system as claimed in claim 11 is characterized in that:
Between described source base station and the described target BS, transmit described mobility parameter adjustment negotiation request message and mobility parameter adjustment negotiate response message by X2 interface or S1 interface.
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