CN104735679A - Method for enabling Femto gateway to have access to core network pool, gateway and network framework - Google Patents
Method for enabling Femto gateway to have access to core network pool, gateway and network framework Download PDFInfo
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- CN104735679A CN104735679A CN201310718635.0A CN201310718635A CN104735679A CN 104735679 A CN104735679 A CN 104735679A CN 201310718635 A CN201310718635 A CN 201310718635A CN 104735679 A CN104735679 A CN 104735679A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/18—Network planning tools
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/26—Cell enhancers or enhancement, e.g. for tunnels, building shadow
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/16—Gateway arrangements
Abstract
The invention provides a method for enabling an Femto gateway to have access to a core network pool and a gateway. The method comprises the steps that location update messages are obtained, and decoding is performed on the location update messages; whether the location update messages need to be sent to a core network is judged according to the location update types; LAC switching is performed on the decoded location update messages needing to be sent to the core network; a corresponding MSC/SGSN in the core network is selected to be sent. The invention further provides a network framework. According to the method for enabling the Femto gateway to have access to the core network pool, the gateway and the network framework, a network level automatic real-time redundancy backup mechanism is supplied in network Pool application under an Femto framework.
Description
Technical field
The present invention relates to cordless communication network, particularly relate to the method in Femto gateway accessing core net pond, gateway and network architecture.
Background technology
In traditional network architecture, core net is tree structure, and a BSC/RNC can only be controlled by a core net node, if core net node breaks down, its BSC/RNC managed just cannot normally work.Along with the progress of technology, there is a kind of MSC Pool technology in industry, this technology introduces the concept of " Chi Qu " (Pool Area), and multiple core net node forms a pool area.From the man-to-man control planning of RNC/BSC and MSC was different in the past, each RNC/BSC in MSC Pool can be controlled by MSC nodes all in pond, each MSC node region that all RNC/BSC cover in service pool district comparably, the terminal use being connected to RNC/BSC can be registered to any one the MSC node in pond.By introducing MSC Pool technology, providing and a kind ofly avoiding point-to-multipoint connection restriction, reaching the means of network resources locating simultaneously.
Femto is in recent years according to the subminaturization mobile base station that wireless network development and mobile broadband trend are released, and is a based on IP passback, PnP device, the Novel net element device of integrated most of BSC/RNC function.Its typical network architecture is as Fig. 1.
In this system, gateway is only connected with MSC/MGW and SGSN, and continued the tree structure in the network architecture of traditional base station, gateway can only be controlled by a core net node, if core net node breaks down, its BSC/RNC managed just cannot normally work.
As can be seen from the network architecture of Femto system, Femto gateway as the convergent point of Femto base station, as long as realize that NNSF function just can realize Femto system at Femto gateway enter Pool function.But the base station number that Femto gateway accesses below is far away higher than the quantity of BTS/NodeB below traditional BSC/RNC, base station number below traditional BSC/RNC generally tens, the order of magnitude of hundreds of, but the base station number that in Femto system, Femto gateway accesses below is at least all thousands of, tens thousand of order of magnitude.
Existing Femto system access mode not with existing network MSC/SGSN group Pool.As shown in Figure 2 and Figure 3.
In existing Femto SNA, gateway is only subject to a core net node and controls, and when this one malfunctions, will cause comprehensive service impact to Femto system, network reliability is poor; Owing to belonging to independently Controlling vertex, when roaming to other MSC/SGSN with user, the switching that needs do across MSC/SGSN and location updating, add core network signalling load, reduce power system capacity; The load of the MSC/SGSN of Femto system access is shared voluntarily, and can not carry out load balancing with other MSC/SGSN, resource busy differs.
Femto systematic difference scene is the coverage hole of grand network or weak covering area mainly.Current Femto systematic difference is specific assigned independently LAC, will be introduced in location updating and the handover request of the continuous cell reselection generation in border district like this, if Femto system is not supported into Pool function, greatly will increase the signaling consumption between MSC.Also can make to exhale success rate and paging success rate to reduce simultaneously.
Summary of the invention
In view of this, the invention provides a kind of method of Femto gateway accessing core net pond, gateway and network architecture, can capacity be increased.
The invention provides a kind of method of Femto gateway accessing core net pond, comprise step:
Obtain location updating message, and described location update message is decoded;
Judge whether to need to issue core net according to the type of location updating;
By the conversion needing the decoded location update message issuing core net to carry out LAC; And select MSC/SGSN corresponding in core net to send.
The invention provides a kind of Femto gateway, comprising:
Decoder module, for carrying out the decoding of location update message, and judges whether to need to issue core net according to the type of location updating;
NNSF module, communicates to connect with MSC/SGSN each in core net pond, for the conversion that will the decoded location update message issuing core net needed to carry out LAC; And select MSC/SGSN corresponding in core net to send.
The invention provides another kind of Femto gateway, comprising:
Decoder module, for carrying out the decoding of location update message, and judges whether to need to issue core net according to the type of location updating;
Modular converter, for the conversion that will the decoded location update message issuing core net needed to carry out LAC;
NNSF module, communicates to connect with MSC/SGSN each in core net, for selecting MSC/SGSN corresponding in core net to send the location updating message after conversion.
The invention provides a kind of network architecture of Femto system, comprising: Femto gateway and core net pond;
Decoder module, for carrying out the decoding of location update message, and judges whether to need to issue core net according to the type of location updating;
NNSF module, communicates to connect with MSC/SGSN each in core net, for the conversion that will the decoded location update message issuing core net needed to carry out LAC; And select MSC/SGSN corresponding in core net to send.
The invention provides the network architecture of another kind of Femto system, comprising: Femto gateway and core net pond;
Decoder module, for carrying out the decoding of location update message, and judges whether to need to issue core net according to the type of location updating;
Modular converter, for the conversion that will the decoded location update message issuing core net needed to carry out LAC;
NNSF module, communicates to connect with MSC/SGSN each in core net, for selecting MSC/SGSN corresponding in core net to send the location updating message after conversion.
The present invention program achieves NNSF function at Femto gateway first, and optimizes NNSF algorithm and related procedure, enters Pool function for what support Femto system.The group Pool application of the present invention under Femto framework provides network level, and redundancy backup is machine-processed in real time automatically.All mutually redundant between MSC-Server/SGSN all in " Chi Qu ".If wherein any one there occurs fault, the user that it is served is once there be service request, can be taken over by other MSCServer/SGSN in Pool at once, achieve automatic, real-time redundant safety security mechanism truly, improve femto systematic difference and be worth.
Group Pool application under Femto framework can avoid the unbalanced utilization of Internet resources, improves investment utilance.Under traditional networking model, each MSC/SGSN is different due to service area geographical position, the user behavior of service is also different, and peak traffic appears at different time, different location usually.Therefore, often can cause to limit because load is too high at some MSC/SGSN of traffic peak and exhale, and the situation that some MSC/SGSN load is very low.Under Femto framework group Pool application can balanced different regions, the peak traffic of heterogeneous networks period, enhance the impact resistance of network.
Group Pool application under Femto framework is beneficial to and alleviates core network signalling expense, improves core network capacity.Traditional group net mode, for the flourishing city having denser population, the coverage of each MSCServer/SGSN is very little, and the location updating/switching between MSC/SGSN is very frequent.Group Pool under Femto framework applies the coverage into expanding MSCServer/SGSN, reduces the number of times of inter-office switchover, decreases the system signaling expense of MSC/SGSN and HLR, improves power system capacity.
Accompanying drawing explanation
Fig. 1 is prior art Femto system typical network architecture.
Fig. 2 is existing Femto system group network schematic diagram.
Fig. 3 is Femto system group network conceptual scheme in prior art.
Fig. 4 is the method flow diagram in the Femto gateway accessing core net pond in the embodiment of the present invention.
Fig. 5 is the Femto gateway logic diagram in the embodiment of the present invention.
Fig. 6 is the MSC Pool networking plan figure in the embodiment of the present invention.
Fig. 7 is the SGSN Pool networking plan figure in the embodiment of the present invention.
Fig. 8 is the Femto system pages schematic diagram of mechanism in the embodiment of the present invention.
Fig. 9 is NNSF algorithm flow chart in the Femto gateway in the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
In Femto system, a large amount of Femto base stations is converged by Femto gateway, is transferred to core net.The access of Femto base stations being in charge wireless side user.
The method in Femto gateway accessing core net pond in one embodiment of the present of invention, as shown in Figure 4, comprises step:
Obtain location updating message, and described location update message is decoded;
Judge whether to need to issue core net according to the type of location updating;
By the conversion needing the decoded location update message issuing core net to carry out LAC; And select MSC/SGSN corresponding in core net to send.
As an embodiment, in Pool networking, Femto base station, without the need for any change, only need increase NNSF function at Femto gateway and just can realize.Therefore An embodiment provides a kind of Femto gateway, as shown in Figure 5, comprising:
Decoder module, for carrying out the decoding of location update message, and judges whether to need to issue core net according to the type of location updating;
NNSF module, communicates to connect with MSC/SGSN each in core net pond, for the conversion that will the decoded location update message issuing core net needed to carry out LAC; And select MSC/SGSN corresponding in core net to send.
As an embodiment, as shown in Figure 6, in MSC Pool networking, the object that MSC Pool reaches redundancy and load sharing can be accessed by the two MGW of access, Femto gateway needs to set up logic with each MSC in MSCPool and connects, and as an embodiment, needs to consult to distribute with MSC each in pool for the circuit resource (TDM mode) of A interface or IP port resource (IP mode), or be responsible for distribution by MSC completely, Femto gateway is responsible for execution.
As an embodiment, as shown in Figure 7, in SGSN Pool networking, be linked in SGSN Pool by two CE of active/standby mode or load sharing mode, Femto gateway needs to set up logic with the SGSN in each SGSN Pool and connects.
Owing to going out need not anyly change in Femto base station, user can in Femto gateway processes with the mapping of the MSC/SGSN of service, after user enters into Femto system first, Femto gateway is according to NNSF algorithm for user selects a MSC for its service, and NNSF algorithm need ensure the load balancing of each Server in POOL.If that Femto gateway obtains from TMSI/P-TMSI is not Null-NRI, the corresponding relation of NRI and the Server that Femto gateway can be preserved according to self finds out the Server of service, and can by the Server of the message distribution of initial Non-Access Stratum to service.If that Femto gateway obtains from TMSI/P-TMSI is Null-NRI, or NRI does not have Server corresponding with it, or corresponding Server logic connection does not exist, or corresponding Server is in " forbidding state " or " unloading state ", Femto gateway can adopt load balancing algorithms, normal condition is in and logic connects normal Server and reselects one in Pool, and can by the message distribution of initial Non-Access Stratum to the new service Server selected.
As shown in Figure 8, in Femto system, circuit domain generally have employed the mechanism of accurate paging.Namely gateway preserves the positional information of user, upgrades the information of user, only issue specific base station like this, thus save broadcast resource when receiving beep-page message when each location updating.The roughly implementation of accurate paging is that core net distributes to gateway LAC based on LAC conversion, and gateway gives the LAC that eats dishes without rice or wine that all base station assigns are different, forces mobile phone launch position to upgrade, judges whether to need to issue core net when gateway receives location updating.If need to issue core net, just need the LAC LAC that eats dishes without rice or wine being changed into core net distribution just can send.Because the coverage of base station is little, when carry out networking on a large scale or carry out whole floor, Zheng Dong building covering time, location update messages much more very can be caused.In NNSF selection algorithm, also be distribute according to the location updating of mobile phone or select MSC node, therefore in NNSF selection algorithm, if every bar location update message all goes to separate NAS layer message, then remove corresponding MSC node according to solution TMSI/IMSI information out, the performance of gateway will be had a strong impact on.In superincumbent algorithm, we can find out, when gateway carries out in LAC transfer process, can go to separate NAS layer message, when NNSF selection function, can carry out a coding-decoding operation again.The signaling time delay of such generation can be larger, if when voice and packet data concurrent service amount is large, may cause timer expiry, then carry out transmission position requests always, occur vicious circle.
In embodiments of the invention, can be optimized NNSF algorithm, specific as follows: the decoding carrying out location update message in NNSF selection algorithm, then judge whether to need to issue core net according to the type of location updating, if need to issue core net, then in NNSF module, carry out the conversion of LAC, then select corresponding MSC to send.If do not need to send to MSC, then directly reply location updating and accept message to Femto base station.As shown in Figure 9.
Except carrying out except above-mentioned optimization to NNSF algorithm itself, the decoding of location update message can be carried out by Femto gateway, then judge whether to need to issue core net according to the type of location updating, if need to issue core net, then carry out the conversion (whether being undertaken by NNSF module) of LAC, then sent by the MSC that NNSF model choice is corresponding.If do not need to send to MSC, then directly reply location updating and accept message to Femto base station.
In order to understand the present invention more clearly, below enumerate several application example:
Embodiment 1
The present embodiment is described the situation that grand net moves to Femto community.
Step 101: mobile phone enters Femto community from grand net, launch position update request;
Step 102:Femto gateway receives position updating request, decodes;
Step 103: by decoding, find that location updating type is that normal position upgrades, Femto gateway judges that Shi Conghongwang community moves to Femto community;
Step 104: issue NNSF module, carries out LAC conversion to location update message, carries out NNSF selection algorithm, selects corresponding MSC to send;
Step 105:Femto gateway preserves base station information and the NRI information of the correspondence of this mobile phone.
Embodiment 2
The present embodiment is described the situation that Femto community moves to Femto community.
Step 201: mobile phone moves to new Femto community from old Femto community, launch position update request;
Step 202:Femto gateway receives position updating request, decodes;
Step 203: by decoding, find that location updating type is that normal position upgrades, it is move to new Femto community from old Femto community that Femto gateway judges;
Step 204: send location updating and accept message to mobile phone, and the Femto base station information that more new cell-phone is corresponding, upgrade the core network nodes information that its NRI is corresponding;
Step 205: the position update flow of this mobile phone that terminates.
Embodiment 3:
The present embodiment is described other location updating situations
Step 301: mobile phone launch position updating message;
Step 302:Femto gateway receives position updating request, decodes;
Step 303: by decoding, finds that location updating type is not that normal position upgrades, but the one in periodic location update or mobile phone power-on or mobile phone shutdown;
Step 304: send to NNSF module to carry out LAC conversion;
Location update request message after LAC conversion is carried out encoding and is sent to the core net of corresponding NRI by step 305:Femto gateway.
Embodiment 4:
The process of the present embodiment to beep-page message is described.
Step 401:Femto gateway receives the beep-page message that core net sends;
Step 402:Femto gateway is by searching the Femto base station table of called IMS I and correspondence;
Step 403: if found, then send beep-page message to this Femto base station, if do not found, then abandon this beep-page message.
The present invention achieves NNSF function at Femto gateway, and optimizes NNSF algorithm and related procedure, enters Pool function for what support Femto system.
The present invention realizes the group Pool application under Femto system architecture, is the application mode not available for existing Femto system.Group Pool application under Femto framework is the emphasis that the application's scheme needs to carry out patent protection, and standard includes but not limited to GSM/TD-SCDMA/WCDMA/CDMA/LTE.
It is noted that above embodiment is only in order to illustrate the present invention and unrestricted, the present invention is also not limited in above-mentioned citing, and all do not depart from technical scheme and the improvement thereof of the spirit and scope of the present invention, and it all should be encompassed in right of the present invention.
Claims (19)
1. the method in Femto gateway accessing core net pond, is characterized in that, comprise step:
Obtain location updating message, and described location update message is decoded;
Judge whether to need to issue core net according to the type of location updating;
By the conversion needing the decoded location update message issuing core net to carry out LAC; And select MSC/SGSN corresponding in core net to send.
2. method according to claim 1, is characterized in that, also comprises step:
Judge not need to send to core net according to the type of location updating, then directly reply location updating and accept message to Femto base station.
3. method according to claim 1, is characterized in that, also comprises step:
When mobile terminal enters first, be that described mobile terminal selects a MSC/SGSN according to NNSF algorithm;
If that obtain from TMSI/P-TMSI is not Null-NRI, then find out the Server of service according to the corresponding relation of preserved NRI and Server, and by the Server of the message distribution of initial Non-Access Stratum to described service; If that obtain from TMSI/P-TMSI is Null-NRI, or NRI does not have Server corresponding with it, or corresponding Server logic connection does not exist, or corresponding Server is in " forbidding state " or " unloading state ", then adopt load balancing algorithms, normal condition is in and logic connects normal Server and reselects one in described core net pond, and by the message distribution of initial Non-Access Stratum to the new service Server selected.
4. a Femto gateway, is characterized in that, comprising:
Decoder module, for carrying out the decoding of location update message, and judges whether to need to issue core net according to the type of location updating;
NNSF module, communicates to connect with MSC/SGSN each in core net, for the conversion that will the decoded location update message issuing core net needed to carry out LAC; And select MSC/SGSN corresponding in core net to send.
5. Femto gateway according to claim 4, is characterized in that,
When judging not need to send to core net according to the type of location updating, described NNSF module is directly replied location updating and is accepted message to Femto base station.
6. Femto gateway according to claim 4, is characterized in that, described NNSF module also for:
When mobile terminal enters first, be that described mobile terminal selects a MSC/SGSN according to NNSF algorithm;
If that obtain from TMSI/P-TMSI is not Null-NRI, then find out the Server of service according to the corresponding relation of preserved NRI and Server, and by the Server of the message distribution of initial Non-Access Stratum to described service; If that obtain from TMSI/P-TMSI is Null-NRI, or NRI does not have Server corresponding with it, or corresponding Server logic connection does not exist, or corresponding Server is in " forbidding state " or " unloading state ", then adopt load balancing algorithms, normal condition is in and logic connects normal Server and reselects one in described core net pond, and by the message distribution of initial Non-Access Stratum to the new service Server selected.
7. a Femto gateway, is characterized in that, comprising:
Decoder module, for carrying out the decoding of location update message, and judges whether to need to issue core net according to the type of location updating;
Modular converter, for the conversion that will the decoded location update message issuing core net needed to carry out LAC;
NNSF module, communicates to connect with MSC/SGSN each in core net, for selecting MSC/SGSN corresponding in core net to send the location updating message after conversion.
8. Femto gateway according to claim 7, is characterized in that,
When judging not need to send to core net according to the type of location updating, described NNSF module is directly replied location updating and is accepted message to Femto base station.
9. Femto gateway according to claim 7, is characterized in that, described NNSF module also for:
When mobile terminal enters first, be that described mobile terminal selects a MSC/SGSN according to NNSF algorithm;
If that obtain from TMSI/P-TMSI is not Null-NRI, then find out the Server of service according to the corresponding relation of preserved NRI and Server, and by the Server of the message distribution of initial Non-Access Stratum to described service; If that obtain from TMSI/P-TMSI is Null-NRI, or NRI does not have Server corresponding with it, or corresponding Server logic connection does not exist, or corresponding Server is in " forbidding state " or " unloading state ", then adopt load balancing algorithms, normal condition is in and logic connects normal Server and reselects one in described core net pond, and by the message distribution of initial Non-Access Stratum to the new service Server selected.
10. a network architecture for Femto system, is characterized in that, comprising: Femto gateway and core net pond;
Decoder module, for carrying out the decoding of location update message, and judges whether to need to issue core net according to the type of location updating;
NNSF module, communicates to connect with MSC/SGSN each in core net, for the conversion that will the decoded location update message issuing core net needed to carry out LAC; And select MSC/SGSN corresponding in core net to send.
11. network architectures according to claim 10, is characterized in that, described core net pond comprises:
With two MGW of described NNSF model calling; And
The MSC be connected with each described MGW.
12. network architectures according to claim 10, is characterized in that, described core net pond comprises:
With two CE of described NNSF model calling; And
The SGSN be connected with each described CE.
13. network architectures according to claim 10, is characterized in that,
When judging not need to send to core net according to the type of location updating, described NNSF module is directly replied location updating and is accepted message to Femto base station.
14. network architectures according to claim 10, is characterized in that, described NNSF module also for:
When mobile terminal enters first, be that described mobile terminal selects a MSC/SGSN according to NNSF algorithm;
If that obtain from TMSI/P-TMSI is not Null-NRI, then find out the Server of service according to the corresponding relation of preserved NRI and Server, and by the Server of the message distribution of initial Non-Access Stratum to described service; If that obtain from TMSI/P-TMSI is Null-NRI, or NRI does not have Server corresponding with it, or corresponding Server logic connection does not exist, or corresponding Server is in " forbidding state " or " unloading state ", then adopt load balancing algorithms, normal condition is in and logic connects normal Server and reselects one in described core net pond, and by the message distribution of initial Non-Access Stratum to the new service Server selected.
The network architecture of 15. 1 kinds of Femto systems, is characterized in that, comprising: Femto gateway and core net pond;
Decoder module, for carrying out the decoding of location update message, and judges whether to need to issue core net according to the type of location updating;
Modular converter, for the conversion that will the decoded location update message issuing core net needed to carry out LAC;
NNSF module, communicates to connect with MSC/SGSN each in core net, for selecting MSC/SGSN corresponding in core net to send the location updating message after conversion.
16. network architectures according to claim 15, is characterized in that, described core net pond comprises:
With two MGW of described NNSF model calling; And
The MSC be connected with each described MGW.
17. network architectures according to claim 15, is characterized in that, described core net pond comprises:
With two CE of described NNSF model calling; And
The SGSN be connected with each described CE.
18. network architectures according to claim 15, is characterized in that,
When judging not need to send to core net according to the type of location updating, described NNSF module is directly replied location updating and is accepted message to Femto base station.
19. network architectures according to claim 15, is characterized in that, described NNSF module also for:
When mobile terminal enters first, be that described mobile terminal selects a MSC/SGSN according to NNSF algorithm;
If that obtain from TMSI/P-TMSI is not Null-NRI, then find out the Server of service according to the corresponding relation of preserved NRI and Server, and by the Server of the message distribution of initial Non-Access Stratum to described service; If that obtain from TMSI/P-TMSI is Null-NRI, or NRI does not have Server corresponding with it, or corresponding Server logic connection does not exist, or corresponding Server is in " forbidding state " or " unloading state ", then adopt load balancing algorithms, normal condition is in and logic connects normal Server and reselects one in described core net pond, and by the message distribution of initial Non-Access Stratum to the new service Server selected.
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