CN102547858A - Method and system for heterogeneous wireless network resource management structure - Google Patents
Method and system for heterogeneous wireless network resource management structure Download PDFInfo
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- CN102547858A CN102547858A CN2011104498192A CN201110449819A CN102547858A CN 102547858 A CN102547858 A CN 102547858A CN 2011104498192 A CN2011104498192 A CN 2011104498192A CN 201110449819 A CN201110449819 A CN 201110449819A CN 102547858 A CN102547858 A CN 102547858A
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Abstract
The invention discloses a method and a system for a heterogeneous wireless network resource management structure. The system comprises a load control entity (LCE), a traffic monitoring entity (TME), a policy mapping entity (PME), a joint load control server (JLCS) and a global sublayer binding strategy decision-making entity (GSSDE), wherein the LCE, the TME and the PME are located in an access network and the JLCS and the GSSDE are located in a core network. The LCE adopts the level-two resource management function, obtains and carries out the load control policy generated by the PME so as to determine whether each mobile terminal is allowed to be connected or switched to the access network, and obtains and carries out layered data stream sublayer binding strategy generated by the GSSDE so as to determine the number of data sublayers transmitted by the access network. Therefore, while achieving load control, the system achieves scheduling of layered data stream, achieves unified management of mobile users and optimizes resource management structure.
Description
Technical field
The present invention relates to wireless communication technology field, the resource management framework under heterogeneous wireless network is technological, relates in particular to the resource management architecture system and the method for integrated LTE and WLAN heterogeneous wireless network.
Background technology
Heterogeneous wireless network is meant that the Access Network of different access technologies covers each other and the wireless network architecture of multimodality service is provided for the user.Along with the fast development of wireless access technology and the large scale deployment of Radio Access Network, it is very general that the heterogeneous wireless network structure has become.Telecom operators all can build the leading WLAN with operator energetically when setting up the wide-area wireless Access Network on a large scale, to support mobile subscriber's heterogeneous wireless network transmission service.Typical heterogeneous wireless network comprises the heterogeneous wireless network of integrated 3GPP Long Term Evolution (Long Term Evolution is called for short LTE) and 802.11 WLANs (Wireless Local Area Network is called for short WLAN).The advantage of heterogeneous wireless network is the access service of a plurality of access networks can be provided for the user simultaneously, thereby realizes high transmission rate, supports real-time multimedia data professional, improves quality of services for users (Quality ofService is called for short QoS).
It is user behavior very important in the heterogeneous wireless network that level is switched with vertical switching; The former is meant that portable terminal roams between the Access Network overlay area of access technology of the same race; Request inserts the behavior of the Access Network of new access technology of the same race; The latter is meant in a kind of Access Network overlay area of access technology and roams into the Access Network overlay area of another kind of access technology, and asks the behavior of the Access Network of the new not access technology of the same race of access.It is recurrent that level is switched with vertical switching in the heterogeneous wireless network.Research for switching comprises the switch decision that inserts signal, access control, mobile subscriber's load balancing distribution etc.The important content that is radio resource management techniques for the access control decision-making and the optimal management of new customer call and switch call.In heterogeneous wireless network resource management framework technical scheme, need provide perfect solution with problems such as vertical handover management, load balancing and calling access controls to level.
The important feature of heterogeneous wireless network is to adopt the mode of layered data flows to transmit; Promptly; The information source data form many independently layered data flows through coding; The transmission path that these layered data flows will be passed through different Access Networks sends to portable terminal, and by portable terminal the layered data flows that receives is carried out data recombination.Therefore the user who is positioned at overlapping Access Network coverage can receive the layered data flows from a plurality of Access Networks, reaches the higher data transmission rate, and the user who is positioned at single Access Network coverage can only receive the data flow of single Access Network.This transmission means has proposed new challenge to the traditional resource dispatching technique, needs advanced RRM framework technology badly and solves this technical problem.
The networking mode of heterogeneous wireless network mainly is divided into close coupled system and loose coupling mode.Close coupled system is meant through different access network resources management functions are terminated in the networking mode within the core net; Under this networking mode; The Access Network of certain access technology of needs dependence is network as a reference; The unified core net that inserts grid of reference of subnet that the Access Network of other access technologies is regarded as being coupled, thereby need between the core net of grid of reference and other access technologies, set up new communication interface.The loose coupling mode is meant that the Access Network of each access technology is all direct-connected to IP network, and the access network of each access technology is relatively independent, accomplishes whole resource management functions through the information interaction of IP network fully.In the heterogeneous wireless network of integrated LTE and WLAN, resource management techniques scheme and appropriate networking mode are organically combined, be the important goal of resource management framework technology.
In order to solve the technological challenge that heterogeneous wireless network faces, each research institution has all proposed different RRM framework technology with normal structure.Typical RRM framework comprises joint radio resource management (the Joint Radio Resource Management that academia proposed in 2003; Be called for short JRRM) the framework technology; Unite calling access control (Joint Session AdmissionControl through definition; Be called for short JOSAC) entity and federated resource scheduling (Joint Resource Schedule; Abbreviation JOSCH) entity comes uniform dispatching is carried out in user's access behavior and data flow transmission behavior, can realize the dynamic assignment of Radio Resource.In addition; Common radio resource by 3GPP proposed in 2002 is managed (Common Radio Resource Management; Be called for short CRRM) the framework technology, through setting up the CRRM server, and in each access network definition independent radio resources management (Radio ResourceManagement; Abbreviation RRM) entity is realized the uniform dispatching to each access network internal resource so that carry out strategy alternately with the CRRM server.
Owing to be the cell mobile communication systems of representative and be that the WLAN of representative has diverse characteristics at coverage, message transmission rate and resource management scheme etc. aspect many with 802.11 WLAN with the LTE network; Under the situation of LTE network and WLAN fast development in recent years; It is in the heterogeneous wireless network of representative that traditional RRM framework technology can't intactly solve with integrated LTE and WLAN; The whole radio resource management functions that comprise vertical switch call management and access control, load balancing, layered data flows scheduling etc. are needed the RRM framework technical scheme that is applicable to heterogeneous wireless network that proposes the advanced person badly and are intactly solved the problems of the technologies described above.
Summary of the invention
One of technical problem to be solved by this invention is that a kind of heterogeneous wireless network resource management framework method and system need be provided.
In order to solve the problems of the technologies described above; The invention provides a kind of heterogeneous wireless network resource management architecture system; This system comprises: be in load controlled entity LCE, traffic monitoring entity TME and policy mappings entity PME in the Access Network; And be in combined loading Control Server JLCS and the overall sublayer binding strategy decision entity GSSDE in the core net, wherein
Said load controlled entity LCE obtains user mobility information, load state information and the layered data flows sublayer binding information of said Access Network; Said user mobility information and said load state information are sent among the said traffic monitoring entity TME, obtain and carry out the load control strategy that generated from said policy mappings entity PME to determine whether allowing each portable terminal to insert or to switch in the said Access Network and obtain and carry out from said overall sublayer and bind layered data flows sublayer binding strategy that decision entity GSSDE generated to confirm the number of the data sublayer that said Access Network is transmitted;
Said traffic monitoring entity TME; Estimate switch call intensity of flow numerical value based on said user mobility information; Said load state information and the said user mobility information that to from said load controlled entity LCE, obtain are sent to said combined loading server JLCS, and the load mobility information table that will from said combined loading server JLCS, obtain and said switch call intensity of flow numerical value are sent to policy mappings entity PME;
Said policy mappings entity PME generates the load control strategy according to the said load mobility information table and the said switch call intensity of flow numerical value that receive from said traffic monitoring entity TME, and the said load control strategy that will generate is sent to said load controlled entity LCE;
Said load state information that said combined loading Control Server JLCS is obtained based on the said traffic monitoring entity TME in each Access Network and said user mobility information, generate the load mobility information table of the whole network, and the load mobility information table that is generated is sent among the said traffic monitoring entity TME in each Access Network;
Said overall sublayer binding strategy decision entity GSSDE generates the layered data flows sublayer binding strategy in each Access Network based on the layered data flows sublayer binding information that the said load controlled entity LCE in each Access Network is obtained, and said layered data flows sublayer binding strategy is sent to the said load controlled entity LCE in each Access Network.
Heterogeneous wireless network resource management architecture system according to a further aspect of the invention, said traffic monitoring entity TME calculates said call-flow strength values based on the curve fit mode.
Heterogeneous wireless network resource management architecture system according to a further aspect of the invention, said policy mappings entity PME generates said load control strategy based on the policy mappings algorithm,
Wherein, said policy mappings algorithm is the mapping algorithm of simple mapping, Linear Mapping algorithm or semi-Markov decision model.
Heterogeneous wireless network resource management architecture system according to a further aspect of the invention, said layered data flows sublayer binding information comprise that said policy mappings entity place Access Network layered data flows sublayer binding number and said policy mappings entity allow to insert or switch to the layered data flows sublayer number that said policy mappings entity belongs to the portable terminal expectation reception of Access Network.
Heterogeneous wireless network resource management architecture system according to a further aspect of the invention, said load control strategy comprise decision variable, the acceptance of accepting or refusing to insert request or handoff request or refuse to insert and ask or the probability numbers of handoff request or the concrete form of representing with numerical table, curve or analytical expression.
Heterogeneous wireless network resource management architecture system according to a further aspect of the invention, said user mobility information comprise the information of rate travel, switching frequency and/or the historical load numerical value of portable terminal.
Heterogeneous wireless network resource management architecture system according to a further aspect of the invention, said load controlled entity LCE is connected with said policy mappings entity PME, said traffic monitoring entity TME and said overall sublayer binding strategy decision entity GSSDE respectively with the connected mode of control plane;
Said traffic monitoring entity TME is connected with said combined loading Control Server JLCS with the connected mode of control plane;
Said load controlled entity LCE is connected with gateway with said portable terminal respectively with the connected mode of datum plane.
According to a further aspect in the invention, a kind of heterogeneous wireless network resource management framework method is provided also, this method comprises:
Load controlled entity LCE in each Access Network obtains the user mobility information of each Access Network and the load state information of each Access Network;
Traffic monitoring entity TME in each Access Network obtains the switch call intensity of flow numerical value of each Access Network based on the said user mobility information from said load controlled entity LCE;
Combined loading Control Server JLCS in the core net generates load mobility information table based on said user mobility information and the said load state information from said traffic monitoring entity TME, and said load mobility information table is sent to said traffic monitoring entity TME;
Each policy mappings entity PME based on the strength values and the said load mobility information table of the stream of the said switch call among the said traffic monitoring entity TME, generate the load control strategy of said policy mappings entity place Access Network; And said load control strategy is sent to said load controlled entity LCE; Said load controlled entity LCE carries out said load control strategy to determine whether allowing each portable terminal to insert or to switch to said policy mappings entity PME place Access Network
When said policy mappings entity PME allows said portable terminal to insert or switch to said policy mappings entity PME place Access Network,
Said load controlled entity LCE obtains layered data flows sublayer binding information;
Overall sublayer binding strategy decision entity GSSDE in the core net is based on layered data flows sublayer binding information, generation layered data flows sublayer binding strategy from said load controlled entity LCE;
Said load controlled entity LCE carries out said layered data flows sublayer binding strategy based on the said layered data flows sublayer binding strategy from said overall sublayer binding strategy decision entity GSSDE, to confirm the number of the data sublayer that Access Network was transmitted, said load controlled entity LCE place.
According to a further aspect in the invention; A kind of heterogeneous wireless network system also is provided; Said heterogeneous wireless network system is the LTE/WLAN heterogeneous wireless network; It adopts, and each described heterogeneous wireless network resource management architecture system carries out wireless network resource management in the claim 1 to 4, wherein
Adopt X2 interface interconnected respectively between the said traffic monitoring entity TME in each LTE sub-district;
Adopt the S1 interface interconnected between the said traffic monitoring entity TME in each LTE sub-district and the physical entity of LTE core net;
Link to each other through the close coupling interface respectively between the said traffic monitoring entity TME in said traffic monitoring entity TME in each WLAN and each LTE sub-district and between the physical entity of LTE core net, wherein,
Be that communication interface based on IP tunneling links to each other through the close coupling interface respectively between the said traffic monitoring entity TME in said traffic monitoring entity TME in each WLAN and each LTE sub-district and between the physical entity of LTE core net;
Combined loading Control Server JLCS and overall sublayer binding strategy decision entity GSSDE are arranged in the physical entity of said LTE core net;
Said traffic monitoring entity TME in each LTE sub-district, said load controlled entity LCE and said policy mappings entity PME are positioned at the base station physical entity, perhaps, are positioned at the physical entity of the RRM server that is independent of the base station;
Said traffic monitoring entity TME, said load controlled entity LCE and said policy mappings entity PME in each WLAN are positioned at the access point physical entity, perhaps, are positioned at the RRM server physical entity that is independent of access point.
Compared with prior art, the present invention can have the following advantages:
The present invention is through adopting load control strategy generative process and layered data flows scheduling process; Dynamically the optimizing resources management process realizes adaptive RRM, especially two order asset management functions of the load controlled entity among the present invention; Can concentrate and realize the multinomial technical goal of RRM efficiently; Make this system when accomplishing load control, accomplish the scheduling of layered data flows, realize mobile subscriber's unified management, optimized resource management architectures.
The invention provides heterogeneous network RRM framework efficiently, compare conventional art and realized heterogeneous network RRM framework preferably.
Other features and advantages of the present invention will be set forth in specification subsequently, and, partly from specification, become obvious, perhaps understand through embodiment of the present invention.The object of the invention can be realized through the structure that in specification, claims and accompanying drawing, is particularly pointed out and obtained with other advantages.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used to explain the present invention with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural representation according to the heterogeneous wireless network resource management architecture system of first embodiment of the invention;
Fig. 2 is according to the two order asset management functions structural representations of (Load Control Entity is called for short LCE) of load controlled entity in the heterogeneous wireless network resource management architecture system of first embodiment of the invention;
Fig. 3 is the schematic flow sheet according to the heterogeneous wireless network resource management framework method of second embodiment of the invention;
Fig. 4 is the schematic flow sheet according to user's access of second embodiment of the invention;
Fig. 5 is the schematic flow sheet according to the generation load control strategy of second embodiment of the invention;
Fig. 6 is the schematic flow sheet according to the scheduling layered data flows of second embodiment of the invention;
Fig. 7 is the exemplary plot according to the networking plan of the heterogeneous wireless network system of third embodiment of the invention.
Embodiment
Below will combine accompanying drawing and embodiment to specify execution mode of the present invention, how the application technology means solve technical problem to the present invention whereby, and the implementation procedure of reaching technique effect can make much of and implement according to this.Need to prove that only otherwise constitute conflict, each embodiment among the present invention and each characteristic among each embodiment can mutually combine, formed technical scheme is 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 logical order has been shown in flow chart; But in some cases, can carry out step shown or that describe with the order that is different from here.
First embodiment
Fig. 1 is the structural representation according to the heterogeneous wireless network resource management architecture system of the embodiment of the invention, explains that below in conjunction with Fig. 1 the each several part of present embodiment is formed.
In embodiments of the present invention; Comprise following logical functional entity in the heterogeneous wireless network resource management architecture system (also can be described as the heterogeneous wireless network resource management system): load controlled entity (Load ControlEntity; Abbreviation LCE), traffic monitoring entity (Traffic Monitor Entity; Abbreviation TME), policy mappings entity (Policy Mapping Entity; Abbreviation PME), combined loading Control Server (JointLoad Control Server; Be called for short JLCS) and overall sublayer binding strategy decision entity (GlobalSubstream Subscription Decision Entity is called for short GSSDE), the function of each entity of detailed description below.
Fig. 1 illustrates the RRM framework that comprises a plurality of Access Networks.In the present embodiment; Inner at each Access Network; All comprise following logical functional entity: load controlled entity LCE, traffic monitoring entity TME and policy mappings entity PME, and above-mentioned entity is all according to the connected mode of control plane shown in Figure 1 and the JLCS and the GSSDE interactive information of the overall situation.Be the function that example specifies each logical functional entity with certain Access Network below.
Load controlled entity (Load Control Entity; Be called for short LCE); Its connected mode with control plane is connected with TME, PME and GSSDE; Its connected mode with datum plane is connected with portable terminal with gateway; Load state information, user mobility information and data flow sublayer binding information that it is used to obtain current Access Network obtain and carry out load control strategy that PME generates and allow each portable terminal to insert or switch in the Access Network determining whether, and obtain and carry out data flow sublayer binding strategy that GSSDE generates to confirm the number of the data sublayer that Access Network is transmitted.
LCE has two order asset management functions, and Fig. 2 is two order asset management functions structural representations of load controlled entity in the embodiment of the invention, specifies the two order asset management functions structures that LCE adopts below in conjunction with Fig. 2.
The two order asset management functions structures that LCE adopted have the order asset management functions of access and child level resource management function.
Wherein, insert order asset management functions, it is responsible for the access control of mobile terminal UE (subscriber equipment), realizes load balancing control based on the load control strategy that obtains.This function towards to as if do not insert in the Access Network and request inserts the mobile terminal UE in the Access Network or inserted in other Access Networks and request switches to the mobile terminal UE of this Access Network.
Particularly, the access order asset management functions is the LCE reception and carries out the load control strategy from PME, and load state information of obtaining and user mobility information are sent to a kind of function among the TME.
The child level resource management function, it is responsible for realizing the scheduling to the layered data flows of mobile terminal UE (subscriber equipment), distributes layered data flows to carry out congested control based on data flow sublayer binding strategy.This function towards to as if allowed the mobile terminal UE that inserts or switch.
Particularly; The child level resource management function is that LCE is sent to GSSDE with the layered data flows sublayer binding information that obtains, and the GSSDE of LCE reception and execution heterogeneous network generates layered data flows sublayer binding strategy based on layered data flows sublayer binding information and flows to a kind of function in the mobile terminal UE that allows to insert with the individual-layer data that the forwarding gateway sends.Wherein, layered data flows sublayer binding information comprises the information such as layered data flows sublayer number that layered data flows sublayer number that current Access Network should be transmitted and the expectation of current Access Network mobile terminal UE receive.
Traffic monitoring entity (Traffic Monitor Entity; Be called for short TME); Its connected mode with control plane is connected with PME, LCE and JLCS; The switch call intensity of flow numerical value that estimates based on user mobility information, the load state information and the user mobility information of the current Access Network that will obtain from LCE are sent to the JLCS, and the load mobility information table of the whole network that will from JLCS, obtain and switch call intensity of flow numerical value send to PME as input parameter.
Particularly; When mobile terminal UE is sent new access request or handoff request; Mobile terminal UE is sent request to LCE; The load state information of the current Access Network that LCE will obtain and user mobility information are sent among the TME, and TME is sent to the JLCS according to the load state information and the user mobility information that obtain from LCE, and TME goes out current period call-flow strength values according to the user mobility information calculations that obtains.
Need to prove that the curve fit mode of numerical value that can be through load state information is calculated and obtained the call-flow strength values, wherein, user mobility information comprises the information such as rate travel, switching frequency and/or historical load numerical value of portable terminal.TME reports JLCS as the external interface of each Access Network in the RRM framework in the embodiment of the invention with the load state information and the mobility information of the current Access Network that TME obtained; And; From JLCS, obtain the load mobility information table of the whole network, and the call-flow strength values that the load mobility information table and the calculating of current period, the whole network are obtained sends among the PME as input parameter.
Policy mappings entity (Policy Mapping Entity; Be called for short PME); Its connected mode with control plane is connected with LCE with TME, and it is according to the input parameter that receives from TME, that is load mobility information table and switch call intensity of flow numerical value; Generate the load control strategy of current current Access Network of period through RRM policy mappings algorithm, the load control strategy that generates is sent among the LCE.
Please refer to Fig. 1; PME is according to the load mobility information table and the call-flow strength values of current period, the whole network; Carry out RRM policy mappings algorithm to generate the load control strategy; Wherein, the load control strategy can insert for decision variable, acceptance or the refusal of accepting or refuse to insert request or handoff request and ask or the probability numbers of handoff request or the concrete form of representing with numerical table, curve or analytical expression.Wherein, the policy mappings algorithm can adopt modes such as simple mapping, Linear Mapping or semi-Markov decision model.
Need to prove; The load control strategy of the current period that PME generated, current Access Network has comprised to the calling Access Control Policy of current period, current Access Network and load balancing strategy etc.; More specifically; The load control strategy can be to accept or refusal or accept to insert request or handoff request with certain probability, and carries out or do not carry out or carry out load balancing operation etc. with certain probability.
Core net in the heterogeneous wireless network resource management architecture system (also can be described as the heterogeneous wireless network resource management system) in the present embodiment also comprises following logical functional entity: combined loading Control Server JLCS and overall sublayer binding strategy decision entity GSSDE.
Combined loading Control Server JLCS; Its connected mode with control plane is connected with TME; It is based on the load state information and the user mobility information of the Access Network that TME obtained in each Access Network; Generate the load mobility information table of current period the whole network, and the load mobility information table of the whole network that is generated is sent to each Access Network.
Overall situation sublayer binding strategy decision entity (Global Substream Subscription DecisionEntity; Hereinafter to be referred as GSSDE); Its connected mode with control plane is connected with LCE; It is used for the inner LCE of each Access Network of storage is obtained the layered data flows sublayer binding information generation layered data flows sublayer binding strategy of making a strategic decision, and the LCE that layered data flows sublayer binding strategy sends to each access network is carried out.Need to prove that JLCS and GSSDE are independent of each Access Network, inner with each Access Network respectively RRM framework logic entity interactive information.
Particularly, JLCS is used to receive and store the load state information and the mobility information of each Access Network, and generates the load mobility information table of the whole network, sends to each Access Network.GSSDE receives the layered data flows sublayer binding information from LCE, and generates layered data flows sublayer binding strategy based on this information, and the LCE that this strategy is sent in each Access Network carries out, to realize the child level resource management function of LCE.
Need to prove that layered data flows sublayer binding information comprises the layered data flows sublayer binding number of current Access Network layered data flows sublayer binding number, portable terminal expectation and the layered data flows status transmission of each Access Network.GSSDE determines the layered data flows sublayer binding strategy of each Access Network according to these information, that is confirms the number to the layered data flows sublayer of each Access Network transmission.
The present invention is through adopting said system; Especially two order asset management functions of the load controlled entity among the present invention; Dynamically the optimizing resources management process realizes adaptive RRM, makes this system when accomplishing load control, accomplish the scheduling of layered data flows; Realize mobile subscriber's unified management, optimized resource management architectures.
Second embodiment
Fig. 3 is the schematic flow sheet according to the heterogeneous wireless network resource management framework method (also can be called the heterogeneous wireless method for managing resource) of the embodiment of the invention, specifies each step of present embodiment below in conjunction with Fig. 3.
Wherein, user mobility information comprises the information of rate travel, switching frequency and/or the historical load numerical value of portable terminal.
Traffic monitoring entity in each Access Network calculates said call-flow strength values based on the curve fit mode of load state information.
Particularly; Each policy mappings entity adopts RRM policy mappings algorithm; Generate the load control strategy of said policy mappings entity place Access Network of current period; Wherein, RRM policy mappings algorithm is the mapping algorithm of Linear Mapping algorithm or semi-Markov decision model.
Need to prove that the load control strategy is for acceptance or refusal is newly called out or the decision variable of switch call, or generates the said probability numbers of new calling of acceptance or switch call, or generate the concrete form of said numerical table, curve or analytical expression.
When policy mappings entity PME allows mobile terminal UE to insert or switch to policy mappings entity PME place Access Network, then can further carry out the operation of step 340.
Wherein, layered data flows sublayer binding information comprises the layered data flows sublayer number of policy mappings entity PME place Access Network layered data flows sublayer binding number, portable terminal expectation, and the transmission status of each Access Network.Said binding strategy is the layered data flows sublayer number that Access Network should transmit, and the said load controlled entity LCE that sends to this Access Network connects and carries out layered data flows sublayer binding strategy.Load controlled entity LCE is that portable terminal provides data transmission interface, and carries out congested control operation.
For example; Send new the calling or switch call as mobile terminal UE to network; With integrated LTE/WLAN heterogeneous wireless network is example, specifies the RRM framework below and is in the detailed step that the user in the integrated LTE/WLAN heterogeneous wireless network inserts.
Fig. 4 is the schematic flow sheet that inserts according to the user in the heterogeneous wireless network resource management framework method (also can be called the heterogeneous wireless network method for managing resource) of second embodiment of the invention, explains that below in conjunction with Fig. 4 RRM framework of the present invention is in the detailed step that the user in the integrated LTE/WLAN heterogeneous wireless network inserts.
Step 41; When mobile terminal UE when the LCE of current Access Network sends the request of access or handoff request; Whether current Access Network is carried out load control strategy generative process, determine to allow this mobile terminal UE to insert or switch in the network of being asked according to the load control strategy that generates.
More specifically, the access request in the step 41 can be new access request of calling out, and also can be that the calling of horizontal or vertical switching inserts request, and the load control strategy generative process described in the step 41 is repeated by each Access Network equally asynchronously.
Particularly, the detailed process of load control strategy generative process is as shown in Figure 5.Fig. 5 is the schematic flow sheet according to the load control strategy generative process of the heterogeneous wireless network resource management framework method (also can be described as the heterogeneous wireless network method for managing resource) of second embodiment of the invention, specifies each step below.
Particularly, present embodiment is an example with integrated LTE/WLAN heterogeneous wireless network, specifies each step.
Step 51, LCE sends to TME with load state information of obtaining and mobility information, and TME estimates switch call intensity of flow numerical value based on mobility information.
Step 52, TME reports JLCS with load state information and mobility information, counts the load state information and the user mobility information of the whole network by JLCS, and generates the load mobility information table of the whole network.
Step 53, TME dynamically obtains the load mobility information table of the whole network from JLCS.
Step 54, TME is sent to PME with load mobility information table, the call-flow strength values of the whole network, and PME generates the load control strategy based on the load mobility information table and the call-flow strength values of the whole network.
Step 55, PME sends to LCE with the load control strategy and carries out.
More specifically, for integrated LTE/WLAN heterogeneous wireless network, JLCS is positioned at Evolved Packet Core EPC (Mobility Management Entity/gateway, inside MME/S-GW).
Need to prove that step 51 to step 52 and step 53 can repeat to 55 asynchronously.
Step 42, LCE carries out the load control strategy, if this mobile terminal UE is rejected access, then this mobile terminal UE attempts inserting the Access Network of being asked once more or selecting other Access Networks to insert request or handoff request.
Step 43, if this mobile terminal UE is allowed to access, then current Access Network is carried out the layered data flows scheduling process, for the user provides data transport service.
Particularly; The detailed process of layered data flows scheduling process is as shown in Figure 6; Fig. 6 is according to the schematic flow sheet of the layered data flows scheduling of the heterogeneous wireless network resource management framework method (also can be described as the heterogeneous wireless network method for managing resource) of second embodiment of the invention, specifies each step below.
Step 61, LCE collects the layered data flows sublayer information of mobile terminal UE;
Step 62, LCE gives GSSDE with the layered data flows sublayer information reporting of mobile terminal UE, and makes the layered data flows sublayer binding strategy of the overall situation by GSSDE;
Step 63; GSSDE sends to LCE with layered data flows sublayer binding strategy; LCE carries out the forwarding of the layered data flows come from GW (gateway) according to layered data flows sublayer binding strategy, for mobile terminal UE provides data transmission interface, and carries out congested control operation;
Step 64, GW is transmitted to mobile terminal UE with layered data flows via LCE.
More specifically, for integrated LTE/WLAN heterogeneous wireless network, GSSDE is positioned at Evolved Packet Core EPC (Mobility Management Entity/gateway, MME/S-GW) inside.
More specifically, step 61 can repeat with step 62 to step 64 asynchronously.
The inventive method; Through adopting load control strategy generative process and layered data flows scheduling process; Dynamically the optimizing resources management process realizes adaptive RRM, makes the inventive method when accomplishing load control, accomplish the scheduling of layered data flows; Realize mobile subscriber's unified management, optimized resource management architectures.
The 3rd embodiment
Fig. 7 is the schematic flow sheet according to the networking plan of the heterogeneous wireless network system of third embodiment of the invention, and the networking plan of RRM framework technology is described below in conjunction with Fig. 7.
In the present embodiment, the heterogeneous wireless network system is the LTE/WLAN heterogeneous wireless network, and it adopts the heterogeneous wireless network resource management system among first embodiment to carry out wireless network resource management.
According to the standard of existing Long Term Evolution (Long Term Evolution is called for short LTE) system, interconnected between the LTE sub-district through X2 interface, interconnected between LTE sub-district and the LTE core net through the S1 interface.As shown in the figure; Intercouple with 2 LTE sub-districts and 1 WLAN and to be example; In the integrated LTE/WLAN heterogeneous wireless network that adopts RRM architecture system of the present invention; Adopt X2 interface interconnected between the TME in the LTE sub-district, and adopt the S1 interface interconnected between the physical entity of TME in each LTE sub-district and LTE core net.JLCS and GSSDE all are positioned at the physical entity of LTE core net.
Between TME in WLAN and the TME in the LTE sub-district, and, link to each other through certain close coupling interface between the physical entity of the TME in WLAN and LTE core net, for example, can be based on the communication interface of IP tunneling.
The TME, LCE and the PME that are positioned at the LTE sub-district can be positioned at the base station physical entity, also can be positioned at the RRM server physical entity that is independent of the base station; The TME, LCE and the PME that are positioned at WLAN can be positioned at access point (AP) physical entity, also can be positioned at the RRM server physical entity that is independent of AP.
Situation for a plurality of LTE sub-district and a plurality of WLAN intercouples, and networking plan is followed principle of identity.
Present embodiment combines based on system of the present invention and heterogeneous network, has solved the resource management framework problem of integrated LTE and wlan network, is applicable to the scheduling process of real network, is easy in network, realize.
Those skilled in the art should be understood that; Above-mentioned each module of the present invention or each step can realize that they can concentrate on the single calculation element with the general calculation device, perhaps are distributed on the network that a plurality of calculation element forms; Alternatively; They can realize with the executable program code of calculation element, thereby, can they 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 execution mode that the present invention disclosed 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 under any the present invention in the technical field; Under the prerequisite of spirit that does not break away from the present invention and disclosed and scope; Can do any modification 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 (9)
1. heterogeneous wireless network resource management architecture system; It is characterized in that; Comprise: be in load controlled entity LCE, traffic monitoring entity TME and policy mappings entity PME in the Access Network; And be in combined loading Control Server JLCS and the overall sublayer binding strategy decision entity GSSDE in the core net, wherein
Said load controlled entity LCE obtains user mobility information, load state information and the layered data flows sublayer binding information of said Access Network; Said user mobility information and said load state information are sent among the said traffic monitoring entity TME, obtain and carry out the load control strategy that generated from said policy mappings entity PME to determine whether allowing each portable terminal to insert or to switch in the said Access Network and obtain and carry out from said overall sublayer and bind layered data flows sublayer binding strategy that decision entity GSSDE generated to confirm the number of the data sublayer that said Access Network is transmitted;
Said traffic monitoring entity TME; Estimate switch call intensity of flow numerical value based on said user mobility information; Said load state information and the said user mobility information that to from said load controlled entity LCE, obtain are sent to said combined loading server JLCS, and the load mobility information table that will from said combined loading server JLCS, obtain and said switch call intensity of flow numerical value are sent to policy mappings entity PME;
Said policy mappings entity PME generates the load control strategy according to the said load mobility information table and the said switch call intensity of flow numerical value that receive from said traffic monitoring entity TME, and the said load control strategy that will generate is sent to said load controlled entity LCE;
Said load state information that said combined loading Control Server JLCS is obtained based on the said traffic monitoring entity TME in each Access Network and said user mobility information, generate the load mobility information table of the whole network, and the load mobility information table that is generated is sent among the said traffic monitoring entity TME in each Access Network;
Said overall sublayer binding strategy decision entity GSSDE generates the layered data flows sublayer binding strategy in each Access Network based on the layered data flows sublayer binding information that the said load controlled entity LCE in each Access Network is obtained, and said layered data flows sublayer binding strategy is sent to the said load controlled entity LCE in each Access Network.
2. system according to claim 1 is characterized in that,
Said traffic monitoring entity TME calculates said call-flow strength values based on the curve fit mode.
3. system according to claim 1 is characterized in that,
Said policy mappings entity PME generates said load control strategy based on the policy mappings algorithm,
Wherein, said policy mappings algorithm is the mapping algorithm of simple mapping, Linear Mapping algorithm or semi-Markov decision model.
4. system according to claim 1 is characterized in that,
Said layered data flows sublayer binding information comprises that said policy mappings entity place Access Network layered data flows sublayer binding number and said policy mappings entity allow to insert or switch to the layered data flows sublayer number that said policy mappings entity belongs to the portable terminal expectation reception of Access Network.
5. according to each described system of claim 1 to 3, it is characterized in that,
Said load control strategy comprises decision variable, the acceptance of accepting or refusing to insert request or handoff request or refuses to insert and ask or the probability numbers of handoff request or the concrete form of representing with numerical table, curve or analytical expression.
6. according to each described system of claim 1 to 3, it is characterized in that,
Said user mobility information comprises the information of rate travel, switching frequency and/or the historical load numerical value of portable terminal.
7. system according to claim 1 is characterized in that,
Said load controlled entity LCE is connected with said policy mappings entity PME, said traffic monitoring entity TME and said overall sublayer binding strategy decision entity GSSDE respectively with the connected mode of control plane;
Said traffic monitoring entity TME is connected with said combined loading Control Server JLCS with the connected mode of control plane;
Said load controlled entity LCE is connected with gateway with said portable terminal respectively with the connected mode of datum plane.
8. a heterogeneous wireless network resource management framework method is characterized in that, comprising:
Load controlled entity LCE in each Access Network obtains the user mobility information of each Access Network and the load state information of each Access Network;
Traffic monitoring entity TME in each Access Network obtains the switch call intensity of flow numerical value of each Access Network based on the said user mobility information from said load controlled entity LCE;
Combined loading Control Server JLCS in the core net generates load mobility information table based on said user mobility information and the said load state information from said traffic monitoring entity TME, and said load mobility information table is sent to said traffic monitoring entity TME;
Each policy mappings entity PME based on the strength values and the said load mobility information table of the stream of the said switch call among the said traffic monitoring entity TME, generate the load control strategy of said policy mappings entity place Access Network; And said load control strategy is sent to said load controlled entity LCE; Said load controlled entity LCE carries out said load control strategy to determine whether allowing each portable terminal to insert or to switch to said policy mappings entity PME place Access Network
When said policy mappings entity PME allows said portable terminal to insert or switch to said policy mappings entity PME place Access Network,
Said load controlled entity LCE obtains layered data flows sublayer binding information;
Overall sublayer binding strategy decision entity GSSDE in the core net is based on layered data flows sublayer binding information, generation layered data flows sublayer binding strategy from said load controlled entity LCE;
Said load controlled entity LCE carries out said layered data flows sublayer binding strategy based on the said layered data flows sublayer binding strategy from said overall sublayer binding strategy decision entity GSSDE, to confirm the number of the data sublayer that Access Network was transmitted, said load controlled entity LCE place.
9. heterogeneous wireless network system; It is characterized in that said heterogeneous wireless network system is the LTE/WLAN heterogeneous wireless network, it adopts, and each described heterogeneous wireless network resource management architecture system carries out wireless network resource management in the claim 1 to 4; Wherein
Adopt X2 interface interconnected respectively between the said traffic monitoring entity TME in each LTE sub-district;
Adopt the S1 interface interconnected between the said traffic monitoring entity TME in each LTE sub-district and the physical entity of LTE core net;
Link to each other through the close coupling interface respectively between the said traffic monitoring entity TME in said traffic monitoring entity TME in each WLAN and each LTE sub-district and between the physical entity of LTE core net, wherein,
Be that communication interface based on IP tunneling links to each other through the close coupling interface respectively between the said traffic monitoring entity TME in said traffic monitoring entity TME in each WLAN and each LTE sub-district and between the physical entity of LTE core net;
Combined loading Control Server JLCS and overall sublayer binding strategy decision entity GSSDE are arranged in the physical entity of said LTE core net;
Said traffic monitoring entity TME in each LTE sub-district, said load controlled entity LCE and said policy mappings entity PME are positioned at the base station physical entity, perhaps, are positioned at the physical entity of the RRM server that is independent of the base station;
Said traffic monitoring entity TME, said load controlled entity LCE and said policy mappings entity PME in each WLAN are positioned at the access point physical entity, perhaps, are positioned at the RRM server physical entity that is independent of access point.
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