Method and system for notifying cell type based on lte
Based on long evolving system
Cell type informing method and system
Technical field is the present invention relates to the communications field, in particular it relates to which a kind of be based on Long Term Evolution（Long Term Evolution, referred to as LTE) system cell type informing method and system.Background technology Long Term Evolution（Long Term Evolution, referred to as LTE) network is by E-UTRAN (Evolved Universal Terrestrial Radio Access Network, the Universal Terrestrial Radio Access Network of evolution), evolution base station（Evolved NodeB, referred to as eNB) and evolution packet switching center（Evolved Packet Core, referred to as EPC) composition.Fig. 1 shows LTE network structural representation, as shown in figure 1, wherein, above-mentioned E-UTRAN is included can be connected between the eNB connected with EPC by S1 interfaces set, eNB by X2.Wherein, Sl, X2 are It volumes of interfaces.One EPC can manage one or more eNB, and-individual Node B can also be controlled by multiple EPC, and an eNB can manage one or more cells.On the one hand, setting up and run a network needs much work, for example, planning, configuration, optimization, calculating, adjustment, test, prevention mistake, reduction failure, self-recovery etc., operator needs to reduce operation cost and maintenance cost.On the other hand, user needs simplification to use flow, for example, Home Node B (Home Node B) equipment, user wishes that the product of purchase is that electricity can obtain configuration operation automatically on a PnP device, one.Next ^ ^ mobile networks (The Nest Generation Network, referred to as NGN) trend be self-configuring, it is self-optimizing, adaptive, influence of the human factor to network is less and less, therefore, self-organizing network concept is proposed in the industry, and self-organizing network includes self-configuring and the aspect of self-optimizing two.Influence due to Neighboring Cell List to switching is very big, thus Neighboring Cell List generation as a content of self-configuring, purpose is exactly to improve quality of handoff so that network performance is consistent with network change in time.At present, provided in the agreements of 3GPP 36.423, between base station after transport layer link establishment, base station can send X2 to adjacent base station and set up request message, if the base station for receiving message is handled successfully, it will reply X2 and set up response message, otherwise, reply X2 and set up failure response.Set up in request message include the base station under all serving cells information, specifically include cell physical token symbol, global flag symbol,
TAI, broadcast PLMN (Public Land Mobile Network, PLMN）, the information such as frequency.In LTE, cell type is more extensive, in broad terms including macrocell（Macro-cell), Microcell（Micro-cell), PICO honeycombs）Cell, LTE base station from home cell, FEMITO cells etc., and cell characteristic can also be described in more detail in existing protocol, for example, cell coverage area, the mobility index of LTE requirements will be fully guaranteed in the cell that 5 kilometer radius are covered, when radius of society increases to 30 kilometers, slight reduction is only brought to above index, while needing to support mobile subscriber business of the MPS process more than 100 kilometers；For another example native region priority, prioritizing selection priority high cell when user's switching/cell reselection, such as cell sector, one website of macrocell includes three sectors defined in agreement（3 sectors per site), and one website of cell includes a sector（ 1 sectors per site );All cell attributes for being capable of distinguishing cell type may serve to represent different cell types.Terminal is when switching over decision-making, different switchover policy is used for the switching of different types of cell, therefore, it is necessary that cell type is safeguarded in the neighbor list, meanwhile, the cell information report during X2 is set up has large effect to Neighboring Cell List.Set up process to carry out the technology of cell type maintenance by X2 however, not yet realizing at present.The content of the invention considers to propose the present invention the problem of need a kind of cell type maintaining method present in correlation technique, therefore, the present invention is intended to provide a kind of cell type informing method and system based on LTE system, to solve the above problems.To achieve these goals, according to an aspect of the present invention, there is provided a kind of cell type informing method based on LTE systems, this method is used for after adjacent or neighbouring first base station and the second base station set up transport layer link the notice for carrying out cell type, wherein, first base station and the second base station can connect cr connections by X2.Following processing is included according to the cell type informing method based on LTE systems of the present invention：First base station sends X2 to the second base station and sets up request message, wherein, X2 sets up in request message the service cell information for the one or more serving cells for carrying first base station, and cell type information is included in service cell information；Second base station receives X2 and sets up request message, preserves X2 and sets up the service cell information carried in request message.Preferably, the second base station is preserved after service cell information, and the above method further comprises：Second base station is set up and/or maintenance neighborlist according to service cell information, and records each service in the neighbor list
The cell type information of cell.Received in the second base station after X2 sets up request message, the above method further comprises：Second base station is set up request message to X2 and handled, and in the case where handling successfully, return to X2 and set up response message, wherein, X2 sets up in response message the service cell information for the one or more serving cells for carrying the second base station, and cell type information can be included in service cell information；In the case of processing failure, return to X2 and set up failed message.Based on the above, this method can further include：First base station receives X2 and sets up response message, preserves X2 and sets up the service cell information carried in response message.Also, first base station is set up and/or maintenance neighborlist according to service cell information, and records the cell type information of each serving cell in the neighbor list.To achieve these goals, just blunt to notify system there is provided a kind of cell type based on LTE according to another aspect of the present invention, the system includes first base station and the second base station that can be connected by X2 interface.In the cell type notice system based on LTE according to the present invention, first base station is used to after transport layer link is set up set up request message to the second base station transmission X2, wherein, X2 sets up in request message the service cell information for the one or more serving cells for carrying first base station, and cell type information is included in service cell information；Second base station, which is used to receiving the X2 of first base station, sets up request message, and preserves X2 and set up the service cell information carried in request message.Preferably, second base station, which is further used for setting up request message to X2, to be handled, and in the case where handling successfully, X2, which is returned, to first base station sets up response message, wherein, X2 sets up in response message the service cell information for the one or more serving cells for carrying the second base station, and can be included in service cell information ' ■!, area's type information.It is further preferred that first base station/second base station be further used for being set up and/or maintenance neighborlist according to service cell information, and record each service d, the cell type information in area in the neighbor list.At least one the above-mentioned technical scheme provided by the present invention, by being set up in X2/response message in increase cell type information, interaction during being set up using X2 between adjacent base station to service cell information, increase the notice to cell type so that Neighboring Cell List safeguards information more fully（Add cell type）, so as to contribute to handover decisions, handover success rate is improved, operator's O＆M cost is reduced.
Other features and advantages of the present invention will be illustrated in the following description, also, is partly become apparent from specification, or is understood by implementing the present invention.The purpose of the present invention and other advantages can be realized and obtained by specifically noted structure in the specification, claims and accompanying drawing write.Appended drawings are used for providing a further understanding of the present invention, and constitute a part for specification, together with embodiments of the present invention for explaining the present invention, are not construed as limiting the invention.In the accompanying drawings：Fig. 1 is the schematic diagram of the LTE network structure according to correlation technique；Fig. 2 is the flow chart of the cell type informing method based on LTE according to the inventive method embodiment；Fig. 3 is the Signalling exchange flow chart of the cell type informing method based on LTE according to the inventive method embodiment；Fig. 4 is the detailed process figure of the example of the cell type informing method based on LTE according to the inventive method embodiment；Fig. 5 is that the cell type based on LTE of system according to the invention embodiment notifies the structural representation of system.Embodiment is as described above, because cell type is very more in LTE system, comprising macrocell, Kai cells, PICO cells, FEMITO cells etc., the switching principle of different type minizone is different, even in the switching of same type minizone, due to authorizing（CSG (Closed Subscriber Group, closed user group between such as Home eNodeB）Authorize）It is different, cause handoff decision result also different, therefore, it is necessary that cell type is safeguarded in the neighbor list, and also the service cell information during the foundation of Χ 2 notifies to influence whether the foundation of Neighboring Cell List.In view of this, the embodiments of the invention provide the method and system that a kind of cell type based on LTE systems is notified, it passes through the notifying cell type during the foundation of Χ 2, allow to safeguard cell type in the neighbor list, compared to prior art, technical scheme provided in an embodiment of the present invention causes Neighboring Cell List to safeguard information more fully, so as to contribute to handover decisions, handover success rate can be improved, is subtracted
Few operator O＆M cost.The preferred embodiments of the present invention are illustrated below in conjunction with accompanying drawing, it will be appreciated that preferred embodiment described herein is merely to illustrate and explain the present invention, and is not intended to limit the present invention.If it should be noted that not conflicting, the feature in embodiment and embodiment in the application can be mutually combined.Embodiment of the method is according to embodiments of the present invention, there is provided a kind of cell type informing method based on LTE systems, this method is used for after adjacent or neighbouring first base station and the second base station set up transport layer link the notice for carrying out cell type, wherein, first base station and the second base station can be connected by X2 interface.Fig. 2 is the flow chart of the cell type informing method based on LTE according to the inventive method embodiment, as shown in Fig. 2 just the blunt cell type informing method based on LTE system according to the embodiment of the present invention includes following processing (step S202- step S204):Step S202, first base station sends X2 to the second base station and sets up request（X2 Setup Request) message（Corresponding in Fig. 3 301), wherein, X2 sets up in request message the service cell information for the one or more serving cells for carrying first base station, and cell type information is included in service cell information；Step S204, the second base station receives X2 and sets up request message, preserves X2 and sets up the service cell information carried in request message, so that switching is used.Wherein, table 1 below illustrates the service cell information structure according to correlation technique；Table 2 below shows service cell information structure according to embodiments of the present invention.
There is situation range cell physical address M 0-510 cell ID M in cell title
Macrocell, Microcell, PICO cells, cell type M FEMITO cells etc.
TAI
M
PLMN ID lists M 1 is broadcasted to can be seen that by table 1 above and table 2 to maximum broadcast PLMN number frequency M, the cell of table 1 includes the information such as cell physical token symbol, global flag symbol, TAI, broadcast PLMN, frequency, compared to table 1, the cell of cell type is further increased in the service cell information of the embodiment of the present invention, and its span is macrocell, Microcell, PICO cells, FEMITO cells etc..Preferably, in step S204, the second base station is preserved after service cell information（Or while preservation）It can be set up according to service cell information and/or maintenance neighborlist, and record the cell type information of each serving cell in the neighbor list, so, in terminal switching process afterwards, it is that terminal selects suitable Target cell that can combine the information.In addition, being received in the second base station after X2 sets up request message, request message will be set up to X2 and handled.On the one hand, in the case where handling successfully, the second base station returns to X2 and sets up response（X2 Setup Response) message（Corresponding in Fig. 3 302), wherein, X2 sets up in response message the service cell information for the one or more serving cells that can carry the second base station, and cell type information can be included in service cell information.Similarly, first base station receives X2 and set up after response message, X2 can be preserved and set up the service cell information carried in response message, and set up and/or maintenance neighborlist according to service cell information, and record the cell type information of each serving cell in the neighbor list.Wherein, referred to herein as the service cell informations set up in response message of X2 also use structure as shown in table 2.On the other hand, in the case of processing failure, the second base station returns to X2 and sets up failure（X2 Setup Failure) message（Corresponding in Fig. 3 303).
By the way that the present invention may be better understood with reference to following example.Assuming that there is the (first base stations of eNB 1）With eNB2 (the second base stations）The two have been set up the base station of transport layer link, Fig. 4 is the detailed process figure of the example of the cell type informing method based on LTE according to the inventive method embodiment, as shown in figure 4, the blunt cell type informing method according to the embodiment of the present invention can be described as follows：Step S402:ENBl initiates X2 Setup after transport layer foundation to adjacent eNB2
Included in Request message, the request message in the information of all serving cells under eNBl, service cell information again including cell type information；Step S404:ENB2 receives X2 Setup Request message, carry out X2 interface foundation processing, and the service cell information for the eNBl for carrying X2 Setup Request message is stored in locally, for the generation and maintenance of Neighboring Cell List, wherein each cell has corresponding cell type information in the neighbor list；If handling successfully, proceed to step S406, otherwise, proceed to step S408;Step S406:ENB2 is sent in X2 Setup Response message, the information of the X2 Setup Response message packages containing all serving cells under eNB2, service cell information again including cell type information to eNBl；Step S408:ENB2 sends X2 Setup Failure message to eNBl.By above embodiment it can be seen that, notifying cell type information during by being set up in X2, and cell type information is safeguarded in the neighbor list, it is possible to use cell type information is that UE selects suitable switching target small area, realize that switch decision optimizes, improve handover success rate.System embodiment is just blunt according to the embodiment of the present invention, system is notified there is provided a kind of cell type based on LTE, Fig. 5 is that the cell type based on LTE of system according to the invention embodiment notifies the structural representation of system, as described in Figure 5, the system includes the base station 504 of first base station 502 and second that can be connected by X2 interface.In the cell type notice system according to embodiments of the present invention based on LTE, first base station 502 is used to after transport layer link is set up set up request message to the second base station 504 transmission X2, wherein, X2 sets up in request message the service cell information for the one or more serving cells for carrying first base station 502, and cell type information is included in service cell information；Second base station 504, which is used to receiving the X2 of first base station 502, sets up request message, and preserves X2 and set up the service cell information carried in request message.
Preferably, second base station 504, which is further used for setting up request message to Χ 2, to be handled, and in the case where handling successfully, Χ 2, which is returned, to first base station 502 sets up response message, wherein, Χ 2 sets up in response message the service cell information for the one or more serving cells for carrying the second base station 504, and service ' j, cell type information can be included in area's information.It is further preferred that the base station 504 of first base station 502/ second is further used for setting up and/or maintenance neighborlist according to service cell information, and the cell type information of each serving cell is recorded in the neighbor list.It should be noted that multiple details described in above method embodiment are equally applicable to the system embodiment, therefore, the present invention must be obscured in order to unnecessary, eliminate the repeated description to same or similar part.As described above, by means of the present invention, notifying cell type information during by being set up in X2, and cell type information is safeguarded in the neighbor list, so that Neighboring Cell List safeguards information more fully, so as to be that UE selects suitable switching target small area using cell type information, realize that switch decision optimizes, handover success rate is improved, operator's O＆M cost is reduced.Obviously, those skilled in the art should be understood that, above-mentioned each module of the invention or each step can be realized with general computing device, they can be concentrated on single computing device, or be distributed on the network that multiple computing devices are constituted, alternatively, they can be realized with the executable program code of computing device, so as to, it can be stored in storage device and be performed by computing device, or they are fabricated to each integrated circuit modules respectively, or be fabricated to single integrated circuit module to realize by the multiple modules or step in them.So, the present invention is not restricted to any specific hardware and software combination.The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for those skilled in the art, the present invention there can be various modifications and variations.Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection.