CN102056260A - Mobile parameter enquiry and negotiation method and system - Google Patents
Mobile parameter enquiry and negotiation method and system Download PDFInfo
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- CN102056260A CN102056260A CN2009102091485A CN200910209148A CN102056260A CN 102056260 A CN102056260 A CN 102056260A CN 2009102091485 A CN2009102091485 A CN 2009102091485A CN 200910209148 A CN200910209148 A CN 200910209148A CN 102056260 A CN102056260 A CN 102056260A
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Abstract
The invention discloses mobile parameter enquiry and negotiation method and system. The negotiation method comprises the following steps that: a source base station control entity sends a mobile parameter change request to a target base station control entity through a transmission entity, wherein the mobile parameter change request contains mobile parameter change configuration of a source cell attached to the source base station control entity and/ or a target cell attached to the target base station control entity; after the target base station control entity receives the change request, the target base station control entity feeds back a mobile parameter change response message to the source base station control entity through the transmission entity if accepting the change configuration in the change request; and after receiving the mobile parameter change response message, the source base station control entity changes the mobile parameter of the source cell. By using the method disclosed by the invention, the negotiation process can be optimized, and proper mobile parameter configuration can be performed.
Description
Technical field
The present invention relates to the radio honeycomb communication technical field, more specifically, relate to a kind of inquiry and machinery of consultation/system of mobility parameter mobility parameter.
Background technology
LTE (Long Term Evolution, Long Term Evolution) network is formed the network flattening by E-UTRAN (Evolved UTRAN) base station (Evolved NodeB is called for short eNB) and evolution packet switching center (Evolved Packet Core is called for short EPC).As shown in fig. 1, EPC comprises mobile management entity (Mobility Management Entity is called for short MME) and gateway (Serving Gateway is called for short S-GW).E-UTRAN comprises the set of the eNB that is connected by S 1 interface with EPC, can connect by X2 between the eNB.S1, X2 are logic interfacing.An EPC can manage one or more eNB, and an eNB also can be controlled by a plurality of EPC, and an eNB can manage one or more sub-districts (cell).
MANET (Self Organizing Network is called for short 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 applied in and can makes among the LTE 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, save lot of manpower and material resources simultaneously.
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 UTRAN (Universal Terrestrial Radio Access Network, universal terrestrial access network) or GSM (Global System For Mobile Communication, global system for mobile communications) or the switching of CDMA (Code Division Multiple Access, time division multiple access) 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 revising the handoff parameter of this sub-district, need to consider the handoff parameter configuration of relevant adjacent area, the modification 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, be called for short CIO), frequency shift (FS) (frequency specific offset) and sluggish parameter (Hysteresis), can be triggered to UE to specific abutting subdistrict or all of its neighbor sub-district too early and late excessively switching.Under a lot of scenes, the handoff parameter of a sub-district is made amendment, and also will make amendment accordingly in its relevant adjacent area.
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 modification 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 2, 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 modification process of handoff parameter, when Cell a revises Cell a to the handoff parameter of Cell b switching, source base station under the Cell a must be held consultation by X2 mouth message 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 revised reference value and a suitable cause value.Source base station receives that handoff parameter modification response message is then with new handoff parameter configuration take-effective; Receive handoff parameter modification failed message, then do not use new handoff parameter.Again initiate negotiations process next time.
For the parameter modification of sub-district gravity treatment, also be to adopt same negotiation mode.The parameter of sub-district gravity treatment mainly be Serving cell and neighboring interval biasing (Qoffsets, n), same frequency priority frequency offset (Qoffsetfrequency), hysteresis of ranking compositor (Qhyst) etc. during gravity treatment.
There are the following problems in the prior art:
1. the modification negotiations process of mobility parameter (comprising handoff parameter and cell reselection parameters) generally is to finish by X2 interface, when carrying out between system the mobility parameter negotiation, owing to do not have X2 interface between system, then can't carry out the negotiation of mobility parameter by X2 interface; In addition, when not having X2 interface between the eNB, also can't carry out the negotiation of mobility parameter by X2 interface;
2. when under not obtaining the mobility parameter of the other side sub-district situation of (comprising sub-district gravity treatment and handoff parameter), carrying out the negotiation of mobility parameter, can only carry the mobility parameter configuration of this sub-district earlier, in negotiations process, also need carry out the obtaining of mobility parameter configuration of the other side sub-district, increased the signaling process flow process of negotiations process, made that the realization of negotiations process is comparatively complicated.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of inquiry and machinery of consultation/system of mobility parameter, can optimize the process of negotiation, carries out suitable mobility parameter configuration.
In order to address the above problem, the invention provides a kind of machinery of consultation of mobility parameter, comprising:
The source base station controlled entity sends the request of mobility parameter modification by the transmission entity to the target BS controlled entity, and the mobility parameter modification that comprises described source base station controlled entity subordinate's cell-of-origin and/or described target BS controlled entity subordinate's Target cell in this change request disposes;
After described target BS controlled entity is received described change request,, then return mobility parameter modification response message to described source base station controlled entity by the transmission entity if the described change of accepting is wherein disposed;
Described source base station controlled entity carries out this mobility variation of parameter to described cell-of-origin after receiving described mobility parameter modification response message.
Further, described mobility parameter modification configuration comprises described cell-of-origin to the change amount of the handover trigger threshold value of described Target cell and/or the change amount of sub-district gravity treatment activation threshold value, and/or described Target cell is to the change amount of the handover trigger threshold value of described cell-of-origin and/or the change amount of sub-district gravity treatment activation threshold value.
Further, after described target BS controlled entity is received described change request, if do not accept described change configuration wherein, then return mobility parameter modification failed message to described source base station controlled entity, comprise failure cause and/or the acceptable mobility variation of parameter of described Target cell scope in the described mobility parameter modification failed message by the transmission entity;
After described source base station controlled entity is received described mobility parameter modification failed message, readjust the configuration of mobility parameter modification, send the request of mobility parameter modification once more according to wherein described failure cause and/or described change scope.
Further, the acceptable mobility variation of parameter of described Target cell scope comprises that described Target cell is acceptable: described cell-of-origin is to the change amount of the handover trigger threshold value of described Target cell and/or the change amount of sub-district gravity treatment activation threshold value, and/or described Target cell is to the change amount of the handover trigger threshold value of described cell-of-origin and/or the change amount of sub-district gravity treatment activation threshold value.
Further, described handover trigger threshold value comprises or combination in any in the following parameter: cell individual offsets (CIO), frequency shift (FS) (frequency specific offset), sluggish parameter (Hysteresis).
Further, described sub-district gravity treatment activation threshold value comprises or combination in any in the following parameter: the biasing of Serving cell and neighboring interval (Qoffsets, n), same frequency priority frequency offset, gravity treatment the time ranking compositor hysteresis.
Further, when described Target cell is universal mobile telecommunications system (UMTS) sub-district and during in multimedia broadcast multi-broadcasting business (MBMS) multicast and multicast frequency layer, described sub-district gravity treatment activation threshold value also comprises the extra biasing of multimedia broadcast multi-broadcasting business (MBMS) multicast and multicast frequency layer sub-district.
Further, when TDD mode was adopted in described target UMTS sub-district, described Qoffsets, n were Qoffset1s, n; When mode of frequency division duplexing was adopted in described target UMTS sub-district, described Qoffsets, n were Qoffset2s, n.
Further, when the configuration of described mobility parameter modification comprises described Target cell to the change amount of the change amount of the handover trigger threshold value of described cell-of-origin and/or sub-district gravity treatment activation threshold value, if described target BS/base station controller is accepted described mobility parameter modification configuration, then handover trigger threshold value and/or the sub-district gravity treatment activation threshold value of described Target cell to described cell-of-origin changed, and in the described mobility parameter modification response message that returns, comprise described Target cell to the change amount of the handover trigger threshold value of described cell-of-origin and/or the change amount of sub-district gravity treatment activation threshold value.
Further, the request of described mobility parameter modification, described mobility parameter modification response message and described mobility parameter modification failed message are independent message, or carry by configuration message transfer or direct-sending message.
Further, described source base station controlled entity sends before the request of described mobility parameter modification, and is further comprising the steps of:
Described source base station controlled entity sends the request of mobility parameter query by the transmission entity to described target BS controlled entity, comprises the cell ID of described cell-of-origin and described Target cell in this mobility parameter query request, and parameter to be checked;
After described target BS controlled entity is received the request of described mobility parameter query, return the response of mobility parameter query by the transmission entity to described source base station controlled entity, in this mobility parameter query response, comprise the parameter described to be checked of described Target cell.
Further, described parameter to be checked comprises handover trigger threshold value and/or cell reselection parameters threshold value.
Further, described base stations control entity comprises base station, base station controller or radio network controller;
Described transmission entity comprises the mobile management unit and/or the core net of described source base station side and described target BS side.
The present invention also provides a kind of querying method of mobility parameter, comprising:
The source base station controlled entity sends the request of mobility parameter query by the transmission entity to the target BS controlled entity, the cell ID that in this mobility parameter query request, comprises described source base station controlled entity subordinate's cell-of-origin and described target BS controlled entity subordinate's Target cell, and parameter to be checked;
After described target BS controlled entity is received the request of described mobility parameter query, return the response of mobility parameter query by the transmission entity to described source base station controlled entity, in this mobility parameter query response, comprise the parameter described to be checked of described Target cell.
The present invention also provides a kind of negotiating system of mobility parameter, comprising: source base station controlled entity, transmission entity and target BS controlled entity,
Described source base station controlled entity is used for, send the request of mobility parameter modification by described transmission entity to described target BS controlled entity, the mobility parameter modification that comprises described source base station controlled entity subordinate's cell-of-origin and/or described target BS controlled entity subordinate's Target cell in this change request disposes; After receiving mobility parameter modification response message, this mobility variation of parameter is carried out in described cell-of-origin; And, receive mobility parameter modification failed message after, readjust the configuration of mobility parameter modification according to wherein described failure cause and/or described change scope, send the request of mobility parameter modification to described mobile management entity once more;
Described transmission entity is used for, receive the request of described mobility parameter modification after, be transmitted to described target BS; And, receive described mobility parameter modification response message or described mobility parameter modification failed message after, be transmitted to described source base station;
Described target BS controlled entity is used for, receive described change request after, if accept wherein described change configuration, then return mobility parameter modification response message to described mobile management entity; Otherwise, return mobility parameter modification failed message to described mobile management entity, comprise failure cause and/or the acceptable mobility variation of parameter of described Target cell scope in the described mobility parameter modification failed message.
Further, described base stations control entity comprises base station, base station controller or radio network controller;
Described transmission entity comprises the mobile management unit and/or the core net of described source base station side and described target BS side.
The present invention proposes and a kind ofly carry out mobility parameter query and change negotiation method and system, can optimize the process of negotiation, thereby obtain suitable mobility parameter configuration by the S1 mouth.Reduce waste of network resources, improve the performance of network, thereby realize the self-optimization function of network.
Description of drawings
Fig. 1 is the networking schematic diagram of LTE system;
Fig. 2 is the UE mobility schematic diagram of rattling between Cell b and Cell a;
Fig. 3 is the mobility parameter query flow process before the intrasystem mobility parameter negotiation;
Fig. 4 is the mobility parameter negotiation mobility parameter query flow process before between system;
Fig. 5 is for transmitting mobility parameter modification information success flow process by configuration transmission information;
Fig. 6 is for transmitting mobility parameter modification information failure procedures by configuration transmission information;
Fig. 7 is for transmitting mobility parameter modification request success flow process by independent flow process;
Fig. 8 is for transmitting mobility parameter modification request failure procedures by independent flow process;
Fig. 9 is the independent flow process mobility parameter modification success flow process between Inter-RAT;
Figure 10 is the independent flow process mobility parameter modification failure procedures between Inter-RAT;
Figure 11 transmits mobility parameter modification flow process for the information that direct transfers between Inter-RAT.
Embodiment
Core concept of the present invention is: the process that mobility parameter query and modification are consulted is to realize by the interacting message of base stations control inter-entity, the wherein inquiry and the negotiation of the mobility parameter in the LTE system and between LTE system and other system, mainly be to come mutual by the interface message of 1 mouthful of S, both can finish, comprise: mobility parameter modification request message, mobility parameter modification response message, mobility parameter modification failed message by the independent message of S1 interface; Also can pass through base station configuration message transfer (eNB CONFIGURATION TRANSFER) and mobile management unit configuration message transfer (MME CONFIGURATION TRANSFER) or pass through the content that direct-sending message (DIRECT INFORMATION TRANSFER) transmits above-mentioned independent message.
Wherein, above-mentioned base stations control entity is meant eNB for the LTE system, for gsm system is target base station controller (Base Station Controller, be called for short BSC), for UMTS (Universal Mobile Telecommunications System, universal mobile telecommunications system) system then is meant radio network controller (Radio Network Controller is called for short RNC).
Particularly, will be example below with the LTE system, in conjunction with some application scenarioss, the method for mobility parameter negotiation provided by the invention is further described.
Application scenarios one: (Intra-LTE) is by the mobility parameter modification of S1 mouth in the LTE system
As shown in Figure 3, the mobility parameter of the query aim sub-district under this application scenarios (comprising handoff parameter and/or cell reselection parameters) process mainly may further comprise the steps:
Step 101, in the LTE system, source eNB initiates mobility parameter query request message to ask for the mobility parameter threshold of Target cell by transmission entity (as MME) to target eNB, the sign (Cell ID) that has comprised cell-of-origin, Target cell in the mobility parameter query request message, and parameter to be checked, being cell mobility parameter to be checked, can be sub-district gravity treatment activation threshold value and/or sub-district handover trigger threshold value.As shown in table 1 below:
Table 1 mobility parameter query request message
Step 102, MME is handed down to target eNB with mobility parameter query request message;
Step 103, after target eNB is received the mobility parameter query request message that MME issues, return mobility parameter query response message, the sign that has comprised cell-of-origin and Target cell in the message, and the sub-district gravity treatment activation threshold value of the handover trigger threshold value of Target cell and/or Target cell, as shown in table 2 below:
Table 2 mobility parameter query response message
Step 104, MME is transmitted to source eNB with the mobility parameter query response message of receiving.
Wherein, the handover trigger threshold value of Target cell is the side-play amount of cell-level, can include but not limited to the combination of the one or more parameters in the following parameter: cell individual offsets (Cell Individual Offset is called for short CIO), frequency shift (FS) (frequency specific offset), sluggish parameter (Hysteresis).
The sub-district gravity treatment activation threshold value of Target cell includes but not limited to the combination of the one or more parameters in the following parameter: the biasing (Qoffsets of Serving cell and neighboring interval, n), same frequency priority frequency offset (Qoffsetffequency), the hysteresis of ranking compositor (Qhyst) during gravity treatment.
Mobility parameter modification process under this application scenarios mainly comprises:
Step 201, source eNB initiates mobility parameter modification request (or eNB CONFIGURATION TRANSFER by transmission entity (as MME) to target eNB, carry mobility parameter modification solicited message) message, the sign that has comprised cell-of-origin and Target cell in this mobility parameter modification request message, and the change amount of change amount of the handover trigger threshold value of cell-of-origin and Target cell (Handover Trigger Change) and/or sub-district gravity treatment activation threshold value (Cell Reselection Trigger Change), as shown in table 3 below:
Table 3 mobility parameter modification request message
Wherein, the handover trigger threshold value of cell-of-origin (Handover Trigger) is the side-play amount of cell-level, the switching threshold when switching preparation process is initially initiated to target adjacent section in corresponding cell-of-origin; Threshold value when sub-district gravity treatment activation threshold value correspondence terminal and from the cell-of-origin target adjacent area carried out the sub-district gravity treatment.
In addition, source eNB can also carry mobility parameter modification information in sending to the eNB CONFIGURATION TRANSFER message of MME, can comprise mobility parameter modification solicited message, mobility parameter modification response message, mobility parameter modification failure information in this mobility parameter modification information.What comprised this moment is mobility parameter modification solicited message, this mobility parameter modification solicited message can comprise the sign of cell-of-origin and/or Target cell, and the change amount (Handover Trigger Change) of the handover trigger threshold value of cell-of-origin to Target cell and/or Target cell to the cell-of-origin and/or the change amount (Cell Reselection Trigger Change) of sub-district gravity treatment activation threshold value.
Step 202, after MME receives mobility parameter modification request (or the eNB CONFIGURATION TRANSFER) message of source eNB, sign according to Target cell in the mobility parameter modification request wherein, send mobility parameter modification request (or MME CONFIGURATION TRANSFER, also carrying mobility parameter modification solicited message in the message) message by the S1 interface to target eNB;
Step 203, after target BS is received the configuration information that MME issues, can be according to default rule, coupling system performance for example, the parameter configuration of Target cell, and the scope of the determined target side mobility of Consideration parameter changes such as the stability of handoff scenario and success rate, judge whether that the mobility parameter information of accepting in the request of issuing changes request:
If target BS can be accepted its mobility parameter modification of asking, then send mobility parameter modification response (or eNB CONFIGURATION TRANSFER to MME, carry mobility parameter modification response message) message, expression can be accepted change, and is as shown in table 4 below:
Table 4 mobility parameter modification response message
| The cell title | IE type and reference information |
| -＞type of message |
| -＞error diagnosis |
If target BS can not be accepted the mobility parameter modification of being asked, then reply mobility parameter modification failure (eNB CONFIGURATION TRANSFER to MME, carry mobility parameter modification failure information) message, in mobility parameter modification failed message, comprise failure cause and/or the acceptable mobility parameter modification of Target cell scope, the acceptable mobility parameter modification scope here comprise the acceptable Target cell of Target cell to the cell-of-origin and/or the cell-of-origin to the change amount of the handover trigger threshold value of Target cell and/or the change amount of sub-district gravity treatment activation threshold value.As shown in table 5 below:
Table 5 mobility parameter modification failed message
Step 204, MME receives mobility parameter modification response (or eNB CONFIGURATION TRANSFER, carry mobility parameter modification response message) after the message, the mobility parameter modification can be carried out in the notification source base station, and then the cell-of-origin promptly changes current mobility switching or sub-district gravity treatment activation threshold value; MME receives mobility parameter modification failure (or eNB CONFIGURATION TRANSFER, carry mobility parameter modification failure information) after the message, send mobility parameter modification failed message to source base station, perhaps by MME CONFIGURATION TRANSFER message informing source base station mobility parameter modification request this time failure, source base station receives mobility parameter modification failure (or MMECONFIGURATION TRANSFER, carry mobility parameter modification failure information) after the message, at failure cause and mobility parameter modification scope thereof, can readjust the mobility parameter of Target cell, initiate mobility parameter modification request (or eNB CONFIGURATION TRANSFER, carry mobility parameter modification solicited message) process once more.
In addition, in this Intra-LTE application scenarios, except transmitting the mobility parameter modification information, can also transmit mobility parameter modification information by eNB DIRECT INFORMATION TRANSFER and MME DIRECT INFORMATION TRANSFER by configuration transmission information.
Application scenarios two: Inter-RAT between system (Radio Access Technique, wireless access technology) is by the mobility parameter modification process of S1 mouth
As shown in Figure 4, the mobility parameter query process of query aim sub-district may further comprise the steps:
Step 301, source base station to target base station controller or radio network controller, send mobility parameter query request message to ask for the mobility parameter threshold of Target cell by the transmission entity;
As shown in table 1, comprised the sign of cell-of-origin and Target cell in the mobility parameter query request message, and the cell mobility parameter of inquiry, the cell mobility parameter of inquiry can be sub-district gravity treatment activation threshold value and/or sub-district handover trigger threshold value.
Should comprise MME and target side CN (Core Nerwork, core net) with the transmission entity in the scene.
Step 302, MME is forwarded to target side CN with mobility parameter query request message;
Step 303, target side CN is sent to target base station controller/target radio network controller with the request of mobility parameter query;
Step 304, after target base station controller/target radio network controller is received mobility parameter query request message, respond mobility parameter query response message to CN, comprise the sign of cell-of-origin and Target cell in the message, and Target cell is to the handover trigger threshold value of cell-of-origin; And/or Target cell is as shown in table 6 below to the sub-district gravity treatment activation threshold value of cell-of-origin:
Table 6 mobility parameter query response message
Wherein, Target cell is the side-play amount of cell-level to the handover trigger threshold value of cell-of-origin, can include but not limited to the combination of the one or more parameters in the following parameter: cell individual offsets (Cell Individual Offset is called for short CIO), frequency shift (FS) (frequency specific offset), sluggish parameter (Hysteresis).
Target cell includes but not limited to the combination of the one or more parameters in the following parameter to the sub-district gravity treatment activation threshold value of cell-of-origin: the biasing (Qoffsets of Serving cell and neighboring interval, n), same frequency priority frequency offset (Qoffsetfrequency), the hysteresis of ranking compositor (Qhyst) during gravity treatment.Wherein, Qoffsets, n comprise the Qoffset1 that is used for UMTS TDD (Time Division Duplexing, time division duplex)
S, nWith the Qoffset2 that is used for UMTS FDD (Frequency Division Duplexing, Frequency Division Duplexing (FDD)) system
S, n.Further, gravity treatment activation threshold value in sub-district can also contain the extra biasing (Qoffmbms) of MBMS (Multimedia Broadcast Multicast Service, multimedia broadcast multi-broadcasting business) multicast and multicast frequency layer sub-district.
Step 305～306, target side CN is transmitted to source eNB by MME with mobility parameter query response message.
Mobility parameter-negotiation procedure under this application scenarios comprises the steps:
Step 401, source eNB initiates mobility parameter modification request message to MME, the sign that has comprised cell-of-origin and Target cell in the mobility parameter modification request message, and the change amount (Handover Trigger Change) of the handover trigger threshold value of cell-of-origin and/or the change amount (Cell Reselection Trigger Change) of sub-district gravity treatment activation threshold value to Target cell and/or Target cell to the cell-of-origin;
Perhaps, source base station carries mobility parameter modification solicited message in DIRECT INFORMATION TRANSFER message, the sign that comprises cell-of-origin and/or Target cell in the mobility parameter modification solicited message, and the change amount (Handover Trigger Change) of the handover trigger threshold value of cell-of-origin and/or the change amount (Cell Reselection Trigger Change) of sub-district gravity treatment activation threshold value to Target cell and/or Target cell to the cell-of-origin;
Step 402, after MME receives the mobility parameter modification request (or DIRECT INFORMATION TRANSFER) of cell-of-origin, according to the sign of the Target cell of its request, discovery is different system, can send mobility parameter modification request (or direct-sending message) to target side CN;
Step 403, target side CN sends mobility parameter modification request (or DIRECT INFORMATION TRANSFER) by interface to the Target cell of target BS again;
Step 404, after target base station controller/target radio network controller is received the mobility parameter modification request (or DIRECT INFORMATION TRANSFER) that target side CN issues, can be according to default rule at Target cell, judge whether to accept the mobility parameter modification in the request of issuing:
If accept the parameter modification that it is asked, then target base station controller/target radio network controller sends mobility parameter modification response (or DIRECT INFORMATION TRANSFER, carry mobility parameter modification response message) to target side CN;
If can not accept the mobility parameter modification of the request of issuing, target base station controller/target radio network controller is just replied mobility parameter modification failure (or DIRECT INFORMATION TRANSFER, carry mobility parameter modification request failure information) message, mobility parameter modification failure information comprises the acceptable mobility parameter modification scope of failure cause and/or its target side.The acceptable Target cell that the acceptable mobility parameter modification scope here comprises Target cell to the cell-of-origin and/or the cell-of-origin to the change amount of the handover trigger threshold value of Target cell and/or the change amount of sub-district gravity treatment activation threshold value.
Step 405, target side CN sends to MME with the response of mobility parameter modification or failure (or DIRECTINFORMATION TRANSFER) message;
Step 406, MME receives mobility parameter modification response (or DIRECT INFORMATION TRANSFER, carry mobility parameter modification response message) after, the mobility parameter modification can be carried out in the notification source base station, then the cell-of-origin changes current mobility activation threshold value, MME receives mobility parameter modification failure response (or DIRECT INFORMATION TRANSFER, carry mobility parameter modification request failure information) after, then notification source base station mobility parameter modification request this time failure, after the cell-of-origin receives the failure of mobility parameter modification, at failure cause and mobility parameter modification scope, readjust the mobility parameter of Target cell, can send mobility parameter modification request message (or DIRECT INFORMATION TRANSFER, carry mobility parameter modification solicited message) once more.
In addition, under the Inter-RAT scene,, also can transmit mobility parameter modification information by the configuration message transfer except transmitting by DIRECT INFORMATION TRANSFER message the mobility parameter modification information.
Be described in further detail below with reference to the enforcement of the drawings and specific embodiments technical solution of the present invention.
Embodiment one
In conjunction with Fig. 3, Fig. 5 and Fig. 6, the flow process by configuration information transmission mobility parameter modification in the Intra-RAT scene of present embodiment is described below:
1) source base station is according to the optimization demand of mobility robustness or the optimization demand of load balancing, the mobility parameter of cell-of-origin to the Target cell of having jurisdiction over of target BS revised in decision, source base station by MME after target BS is initiated mobility parameter query process and is obtained the mobility parameter configuration of target side, can generate the new cell-of-origin of a cover and the mobility parameter configuration of Target cell according to the needs of load balancing, and the new cell-of-origin that is just generated with Target cell and the mobility parameter configuration of Target cell are held consultation.
2) source base station sends eNB CONFIGURATION TRANSFER message by the S1 mouth to MME, initiate the negotiations process of mobility parameter modification, carry mobility parameter modification solicited message in the eNB CONFIGURATION TRANSFER message, the sign that wherein comprises cell-of-origin and Target cell, and mobility parameter modification configuration, the configuration of this mobility parameter modification can comprise the change amount of cell-of-origin to the change amount of the mobility activation threshold value of Target cell and/or Target cell to cell-of-origin mobility activation threshold value, and the change amount of mobility activation threshold value herein comprises: the change amount of change amount of handover trigger threshold value (Handover Trigger Change) and/or sub-district gravity treatment activation threshold value (Cell Reselection Trigger Change).
3) after MME receives the eNB CONFIGURATION TRANSFER message of source base station, can be according to the sign of the Target cell in the mobility parameter modification information among the entrained IE, send MME CONFIGURATION TRANSFER message to target BS, also include the mobility parameter modification solicited message that the cell-of-origin sends among this MME CONFIGURATION TRANSFER.
4) target BS receives the MME CONFIGURATION TRANSFER that MME sends, and the rule according to default judges whether to accept the mobility parameter modification.
If the modification of the cell-of-origin that target BS is accepted the source base station request to the modification of the mobility activation threshold value of Target cell and/or Target cell to cell-of-origin mobility activation threshold value, then reply eNB CONFIGURATION TRANSFER to MME, carry mobility parameter modification response message, and when the mobility parameter configuration of Target cell need be revised, in mobility parameter modification response message, carry the change amount (when the mobility parameter configuration of Target cell need not be revised, the change amount of carrying the handover trigger threshold value of Target cell was 0) of the handover trigger threshold value of Target cell.MME can carry out the mobility parameter modification by MME CONFIGURATION TRANSFER (carrying mobility parameter modification response message) message informing cell-of-origin.
If target BS is judged the modification to the modification of the mobility activation threshold value of Target cell and/or Target cell to cell-of-origin mobility activation threshold value of the cell-of-origin can not accept the source base station request, then reply MME CONFIGURATION TRANSFER (carrying mobility parameter modification failure information) to MME, mobility parameter modification failure information comprises the acceptable mobility parameter modification scope of failure cause and/or its target side.The acceptable mobility parameter modification scope here comprise the acceptable Target cell of Target cell to the cell-of-origin and/or the cell-of-origin to the change amount of the handover trigger threshold value of Target cell and/or the change amount of sub-district gravity treatment activation threshold value.
MME sends MME CONFIGURATION TRANSFER (carrying mobility parameter modification failure information) to source base station, notice mobility parameter modification request failure.
Embodiment two
In conjunction with Fig. 3, Fig. 7 and Fig. 8, the flow process by independent message transmission mobility parameter modification information under the Intra-RAT scene of present embodiment is described below:
1) source base station is according to the optimization demand of mobility robustness or the optimization demand of load balancing, the mobility parameter of cell-of-origin to the Target cell of having jurisdiction over of target BS revised in decision, initiate the mobility parameter configuration that mobility parameter query process is obtained target side to target BS, thereby the cell-of-origin generates the new cell-of-origin of a cover and the mobility parameter configuration of Target cell, and carries out the negotiation of mobility parameter with Target cell.
2) source base station sends mobility parameter modification request message by the S1 mouth to MME and initiates the negotiations process of mobility parameter modification, mobility parameter modification request message comprises the sign of cell-of-origin and/or Target cell, and the cell-of-origin is to the change amount (Handover Trigger Change) of the handover trigger threshold value of Target cell and/or the change amount (Cell Reselection Trigger Change) of sub-district gravity treatment activation threshold value, and/or Target cell is to the change amount (Handover Trigger Change) of the handover trigger threshold value of cell-of-origin and/or the change amount (Cell Reselection Trigger Change) of sub-district gravity treatment activation threshold value.
3) after MME receives the mobility parameter modification request message of source base station, can be according to the sign of the Target cell in the mobility parameter modification information among the entrained IE, send mobility parameter modification request message to Target cell, include the mobility parameter modification information of sending the cell-of-origin in this mobility parameter modification request message.
4) after target BS received the mobility parameter modification request that MME sends, the rule according to default judged whether to accept the mobility parameter modification:
If the modification of the cell-of-origin that target BS is accepted the source base station request to the modification of the mobility activation threshold value of Target cell and/or Target cell to cell-of-origin mobility activation threshold value, then reply mobility parameter modification response message to MME, and when the mobility parameter configuration of Target cell need be revised, in mobility parameter modification response message, carry the change amount (when the mobility parameter configuration of Target cell need not be revised, the change amount of carrying the handover trigger threshold value of Target cell was 0) of the handover trigger threshold value of Target cell.The mobility parameter modification can be carried out in MME notification source sub-district.
If target BS is judged the modification to the modification of the mobility activation threshold value of Target cell and/or Target cell to cell-of-origin mobility activation threshold value of the cell-of-origin can not accept the source base station request, then to MME answer mobility parameter modification failed message.Mobility parameter modification failed message can comprise the acceptable mobility parameter modification scope of failure cause and/or its target side.The acceptable mobility parameter modification scope here comprise the acceptable Target cell of Target cell to the cell-of-origin and/or the cell-of-origin to the change amount of the handover trigger threshold value of Target cell and/or the change amount of sub-district gravity treatment activation threshold value.MME sends mobility parameter modification failed message to source base station, notice mobility parameter modification request failure.
In addition, at the Intra-LTE application scenarios, the configuration message transfer and independent message in the foregoing description, in the other embodiments of the invention, can also transmit mobility parameter modification information by eNB DIRECT INFORMATION TRANSFER/MME DIRECT INFORMATION TRANSFER.
Embodiment three
In conjunction with Fig. 4, Fig. 9 and Figure 10, the flow process by independent message transmission mobility parameter modification information in the Inter-RAT scene of present embodiment is described below:
1) source base station is according to the optimization demand of mobility robustness or the optimization demand of load balancing, the mobility parameter of cell-of-origin to the Target cell of having jurisdiction over of target BS revised in decision, initiate the mobility parameter configuration that mobility parameter query process is obtained target side to target base station controller/target radio network controller, thereby the cell-of-origin generates the new cell-of-origin of a cover and the mobility parameter configuration of Target cell.
2) source base station sends mobility parameter modification request message by the S1 mouth to MME then and initiates the negotiations process of mobility parameter modification, mobility parameter modification solicited message can comprise the sign of cell-of-origin and/or Target cell, and the cell-of-origin is to the change amount (Handover Trigger Change) of the handover trigger threshold value of Target cell and/or the change amount (Cell Reselection Trigger Change) of sub-district gravity treatment activation threshold value, and/or Target cell is to the change amount (Handover Trigger Change) of the handover trigger threshold value of cell-of-origin and/or the change amount (Cell Reselection Trigger Change) of sub-district gravity treatment activation threshold value.
3) after MME receives the mobility parameter modification request message of source base station, can be according to the sign of the Target cell in the mobility parameter modification information among the entrained IE, discovery is different system, can send mobility parameter modification request message to target base station controller/target radio network controller of target side CN, include the mobility parameter modification information of sending the cell-of-origin in this mobility parameter modification request message.
4) after target base station controller/target radio network controller received the mobility parameter modification request that target side CN sends, the rule according to default judged whether to accept the mobility parameter modification:
If the modification of the cell-of-origin that target base station controller/target radio network controller is accepted the source base station request to the modification of the mobility activation threshold value of Target cell and/or Target cell to cell-of-origin mobility activation threshold value, reply mobility parameter modification response message then for target side CN, and when the mobility parameter configuration of Target cell need be revised, in mobility parameter modification response message, carry the change amount (when the mobility parameter configuration of Target cell need not be revised, the change amount of carrying the handover trigger threshold value of Target cell was 0) of the handover trigger threshold value of Target cell.Target side CN sends mobility parameter modification response message to MME again, and MME sends mobility parameter modification response message notification source sub-district again can carry out the mobility parameter modification.
If the modification of the cell-of-origin that target base station controller/target radio network controller can not be accepted the source base station request to the modification of the mobility activation threshold value of Target cell and/or Target cell to cell-of-origin mobility activation threshold value is then finally to MME answer mobility parameter modification failed message.Mobility parameter modification failed message can comprise the acceptable mobility parameter modification scope of failure cause and/or its target side.The acceptable mobility parameter modification scope here comprise the acceptable Target cell of Target cell to the cell-of-origin and/or the cell-of-origin to the change amount of the handover trigger threshold value of Target cell and/or the change amount of sub-district gravity treatment activation threshold value.MME sends mobility parameter modification failed message to source base station, notice mobility parameter modification request failure.
Embodiment four
In conjunction with Fig. 4 and Figure 11, the flow process by direct-sending message transmission mobility parameter modification information in the Inter-RAT scene of present embodiment is described below:
1) source base station is according to the optimization demand of mobility robustness or the optimization demand of load balancing, the mobility parameter of cell-of-origin to the Target cell of having jurisdiction over of target BS revised in decision, initiate the mobility parameter configuration that mobility parameter query process is obtained target side to target base station controller/target radio network controller, thereby the cell-of-origin generates the new cell-of-origin of a cover and the mobility parameter configuration of Target cell.
2) source base station sends eNB DIRECT INFORMATION TRANSFER message by the S1 mouth to MME then and initiates the negotiations process of mobility parameter modification, carrying mobility parameter modification solicited message in this eNB DIRECT INFORMATION TRANSFER, mobility parameter modification solicited message can comprise the sign of cell-of-origin and/or Target cell, and the cell-of-origin is to the change amount (Handover Trigger Change) of the handover trigger threshold value of Target cell and/or the change amount (Cell Reselection Trigger Change) of sub-district gravity treatment activation threshold value, and/or Target cell is to the change amount (Handover Trigger Change) of the handover trigger threshold value of cell-of-origin and/or the change amount (Cell Reselection Trigger Change) of sub-district gravity treatment activation threshold value.
3) after MME receives the eNB DIRECT INFORMATION TRANSFER message of source base station, can be according to the sign of the Target cell in the mobility parameter modification information among the entrained IE, discovery is different system, can transmit to target side CN, target side CN is again by sending DIRECT INFORMATIONTRANSFER to target BS, send mobility parameter modification request message, also include the mobility parameter modification information that the cell-of-origin sends in this DIRECTINFORMATION TRANSFER message.
4) after target BS received the mobility parameter modification request that target side CN sends, the rule according to default judged whether to accept the mobility parameter modification:
If the modification of the cell-of-origin that target base station controller/target radio network controller is accepted the source base station request to the modification of the mobility activation threshold value of Target cell and/or Target cell to cell-of-origin mobility activation threshold value, then give target side CN by DIRECT INFORMATION TRANSFER (carrying mobility parameter modification response message), and when the mobility parameter configuration of Target cell need be revised, in mobility parameter modification response message, carry the change amount (when the mobility parameter configuration of Target cell need not be revised, the change amount of carrying the handover trigger threshold value of Target cell was 0) of the handover trigger threshold value of Target cell.Target side CN sends the information that direct transfers to MME again, and MME sends MME DIRECT INFORMATION TRANSFER (carrying mobility parameter modification response message) notification source sub-district again can carry out the mobility parameter modification.
If the modification of the cell-of-origin that target base station controller/target radio network controller is not accepted the source base station request to the modification of the mobility activation threshold value of Target cell and/or Target cell to cell-of-origin mobility activation threshold value, then finally to the DIRECT INFORMATION TRANSFER (carrying mobility parameter modification failure information) of MME answer, mobility parameter modification failure information can comprise the acceptable mobility parameter modification scope of failure cause and/or its target side.The acceptable mobility parameter modification scope here comprise the acceptable Target cell of Target cell to the cell-of-origin and/or the cell-of-origin to the change amount of the handover trigger threshold value of Target cell and/or the change amount of sub-district gravity treatment activation threshold value.MME sends DIRECT INFORMATION TRANSFER (carrying mobility parameter modification failure information) and gives source base station, notice mobility parameter modification request failure.
In addition, among the embodiment under the above-mentioned Inter-RAT scene, except that independent message or direct-sending message, can also transmit mobility parameter modification information by the configuration message transfer.
Further, among the embodiment under above-mentioned Inter-RAT scene, be to be that the situation of the intrasystem eNB of LTE is that example is illustrated with the source base station, as for the situation of cell-of-origin in other system, the inquiry of its mobility parameter and the handling process of negotiation are very similar to the foregoing description, only be flow process in contrast with the previous embodiment, and its inquiry and consult signaling message and also can adopt independent message or direct-sending message.Therefore, can not impact, no longer be repeated in this description at this to setting forth the present invention.
In addition, also provide a kind of negotiating system of mobility parameter in the embodiment of the invention, having comprised: source base station controlled entity, transmission entity and target BS controlled entity, wherein,
The source base station controlled entity is used for, send the request of mobility parameter modification by the transmission entity to the target BS controlled entity, the mobility parameter modification that comprises source base station controlled entity subordinate's cell-of-origin and/or target BS controlled entity subordinate's Target cell in this change request disposes; After receiving mobility parameter modification response message, this mobility variation of parameter is carried out in the cell-of-origin; And, receive mobility parameter modification failed message after, readjust the configuration of mobility parameter modification according to wherein failure cause and/or change scope, send the request of mobility parameter modification to mobile management entity once more;
The transmission entity be used for, receive the request of mobility parameter modification after, be transmitted to target BS; And, receive mobility parameter modification response message or mobility parameter modification failed message after, be transmitted to source base station;
The target BS controlled entity is used for, receive change request after, if accept wherein change configuration, then return mobility parameter modification response message to mobile management entity; Otherwise, return mobility parameter modification failed message to mobile management entity, comprise failure cause and/or the acceptable mobility variation of parameter of Target cell scope in the mobility parameter modification failed message.
Wherein, the base stations control entity comprises base station, base station controller or radio network controller;
The transmission entity comprises the mobile management unit and/or the core net of source base station side and target BS side.
In sum, the invention provides and a kind ofly carry out mobility parameter modification negotiation method and system, solve existing deficiency of consulting flow process, reduce waste of network resources, improve the performance of network, thereby realize the self-optimization function of network by the S1 interface.
Should be appreciated that the above only is the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. the machinery of consultation of a mobility parameter is characterized in that, comprising:
The source base station controlled entity sends the request of mobility parameter modification by the transmission entity to the target BS controlled entity, and the mobility parameter modification that comprises described source base station controlled entity subordinate's cell-of-origin and/or described target BS controlled entity subordinate's Target cell in this change request disposes;
After described target BS controlled entity is received described change request,, then return mobility parameter modification response message to described source base station controlled entity by the transmission entity if the described change of accepting is wherein disposed;
Described source base station controlled entity carries out this mobility variation of parameter to described cell-of-origin after receiving described mobility parameter modification response message.
2. the method for claim 1 is characterized in that,
Described mobility parameter modification configuration comprises described cell-of-origin to the change amount of the handover trigger threshold value of described Target cell and/or the change amount of sub-district gravity treatment activation threshold value, and/or described Target cell is to the change amount of the handover trigger threshold value of described cell-of-origin and/or the change amount of sub-district gravity treatment activation threshold value.
3. the method for claim 1 is characterized in that,
After described target BS controlled entity is received described change request, if do not accept described change configuration wherein, then return mobility parameter modification failed message to described source base station controlled entity, comprise failure cause and/or the acceptable mobility variation of parameter of described Target cell scope in the described mobility parameter modification failed message by the transmission entity;
After described source base station controlled entity is received described mobility parameter modification failed message, readjust the configuration of mobility parameter modification, send the request of mobility parameter modification once more according to wherein described failure cause and/or described change scope.
4. method as claimed in claim 3 is characterized in that,
The acceptable mobility variation of parameter of described Target cell scope comprises that described Target cell is acceptable: described cell-of-origin is to the change amount of the handover trigger threshold value of described Target cell and/or the change amount of sub-district gravity treatment activation threshold value, and/or described Target cell is to the change amount of the handover trigger threshold value of described cell-of-origin and/or the change amount of sub-district gravity treatment activation threshold value.
5. method as claimed in claim 2 is characterized in that,
Described handover trigger threshold value comprises or combination in any in the following parameter: cell individual offsets (CIO), frequency shift (FS) (frequency specific offset), sluggish parameter (Hysteresis).
6. method as claimed in claim 2 is characterized in that,
Described sub-district gravity treatment activation threshold value comprises or combination in any in the following parameter: the biasing of Serving cell and neighboring interval (Qoffsets, n), same frequency priority frequency offset, gravity treatment the time ranking compositor hysteresis.
7. method as claimed in claim 6 is characterized in that,
When described Target cell is universal mobile telecommunications system (UMTS) sub-district and during in multimedia broadcast multi-broadcasting business (MBMS) multicast and multicast frequency layer, described sub-district gravity treatment activation threshold value also comprises the extra biasing of multimedia broadcast multi-broadcasting business (MBMS) multicast and multicast frequency layer sub-district.
8. method as claimed in claim 6 is characterized in that,
When TDD mode was adopted in described target UMTS sub-district, described Qoffsets, n were Qoffset1
S, nWhen mode of frequency division duplexing was adopted in described target UMTS sub-district, described Qoffsets, n were Qoffset2
S, n
9. method as claimed in claim 2 is characterized in that,
When the configuration of described mobility parameter modification comprises described Target cell to the change amount of the change amount of the handover trigger threshold value of described cell-of-origin and/or sub-district gravity treatment activation threshold value, if described target BS/base station controller is accepted described mobility parameter modification configuration, then handover trigger threshold value and/or the sub-district gravity treatment activation threshold value of described Target cell to described cell-of-origin changed, and in the described mobility parameter modification response message that returns, comprise described Target cell to the change amount of the handover trigger threshold value of described cell-of-origin and/or the change amount of sub-district gravity treatment activation threshold value.
10. as each described method of claim 1 to 9, it is characterized in that,
The request of described mobility parameter modification, described mobility parameter modification response message and described mobility parameter modification failed message are independent message, or carry by configuration message transfer or direct-sending message.
11. method as claimed in claim 10 is characterized in that, described source base station controlled entity sends before the request of described mobility parameter modification, and is further comprising the steps of:
Described source base station controlled entity sends the request of mobility parameter query by the transmission entity to described target BS controlled entity, comprises the cell ID of described cell-of-origin and described Target cell in this mobility parameter query request, and parameter to be checked;
After described target BS controlled entity is received the request of described mobility parameter query, return the response of mobility parameter query by the transmission entity to described source base station controlled entity, in this mobility parameter query response, comprise the parameter described to be checked of described Target cell.
12. method as claimed in claim 11 is characterized in that,
Described parameter to be checked comprises handover trigger threshold value and/or cell reselection parameters threshold value.
13. as claim 1 or 11 described methods, it is characterized in that,
Described base stations control entity comprises base station, base station controller or radio network controller;
Described transmission entity comprises the mobile management unit and/or the core net of described source base station side and described target BS side.
14. the querying method of a mobility parameter is characterized in that, comprising:
The source base station controlled entity sends the request of mobility parameter query by the transmission entity to the target BS controlled entity, the cell ID that in this mobility parameter query request, comprises described source base station controlled entity subordinate's cell-of-origin and described target BS controlled entity subordinate's Target cell, and parameter to be checked;
After described target BS controlled entity is received the request of described mobility parameter query, return the response of mobility parameter query by the transmission entity to described source base station controlled entity, in this mobility parameter query response, comprise the parameter described to be checked of described Target cell.
15. the negotiating system of a mobility parameter is characterized in that, comprising: source base station controlled entity, transmission entity and target BS controlled entity,
Described source base station controlled entity is used for, send the request of mobility parameter modification by described transmission entity to described target BS controlled entity, the mobility parameter modification that comprises described source base station controlled entity subordinate's cell-of-origin and/or described target BS controlled entity subordinate's Target cell in this change request disposes; After receiving mobility parameter modification response message, this mobility variation of parameter is carried out in described cell-of-origin; And, receive mobility parameter modification failed message after, readjust the configuration of mobility parameter modification according to wherein described failure cause and/or described change scope, send the request of mobility parameter modification to described mobile management entity once more;
Described transmission entity is used for, receive the request of described mobility parameter modification after, be transmitted to described target BS; And, receive described mobility parameter modification response message or described mobility parameter modification failed message after, be transmitted to described source base station;
Described target BS controlled entity is used for, receive described change request after, if accept wherein described change configuration, then return mobility parameter modification response message to described mobile management entity; Otherwise, return mobility parameter modification failed message to described mobile management entity, comprise failure cause and/or the acceptable mobility variation of parameter of described Target cell scope in the described mobility parameter modification failed message.
16. system as claimed in claim 15 is characterized in that,
Described base stations control entity comprises base station, base station controller or radio network controller;
Described transmission entity comprises the mobile management unit and/or the core net of described source base station side and described target BS side.
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