CN102186244A - Wireless heterogeneous network system and uniform position management method for wireless heterogeneous networks - Google Patents
Wireless heterogeneous network system and uniform position management method for wireless heterogeneous networks Download PDFInfo
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Abstract
The invention provides a wireless heterogeneous network system capable of realizing the uniform position management of wireless heterogeneous networks simply and effectively and a uniform position management method for the wireless heterogeneous networks. The wireless heterogeneous network system comprises respective heterogeneous networks, subscriber terminals, a uniform mobile management database and upper gateways, wherein each upper gateway corresponds to each heterogeneous network and comprises a position updating module and a call processing module; the uniform mobile management database is only used for storing geographical position coordinates of the subscriber terminals, without placing all network position information of the subscriber terminals, so that requirements for a database node are lowered; and any network can be selected to report in the position updating process, without updating positions of all accessed networks, so that the expenditure on resources of wireless links is reduced.
Description
Technical field
The invention belongs to and use wireless isomer network technology, particularly relate to the mobile management of user in the heterogeneous network.
Background technology
In mobile communication from 2G to over more than 10 year of 3G development, produced the different Radio Transmission Technology of many kinds, as GSM (global system for mobile communications, a kind of the 2nd generation radio communication technical standard), CDMA (code division multiple access, a kind of the 2nd generation radio communication technical standard), WCDMA (Wideband Code Division Multiple Access (WCDMA), a kind of the 3rd generation radio communication technical standard), CDMA2000 (CDMA 2000, a kind of the 3rd generation radio communication technical standard), TD-SCDMA (TD SDMA, a kind of the 3rd generation radio communication technical standard), 802.11a/b/g etc., and new B3G (surpassing 3 third-generation mobile communication systems) and the transmission technology of 4G (the 4th third-generation mobile communication system) are being studied by various countries at present.Obviously, following wireless network will be the hybrid network that multiple heterogeneous network is formed.
The location management technology is one of key technology in the wireless network mobile management, is used to realize following the tracks of, store, searching and upgrade the positional information of moving target.Location management comprises location and two processes of paging: location (position renewal) is meant that moving target reports the process that change its position to network system, and paging (position enquiring) then is the process that network system is searched the moving target position.
The existing at present and widely used location management technology overwhelming majority proposes at homogeneous network, also not exclusively is suitable for for the hybrid network of being made up of heterogeneous network.
Feature at the network isomery, existing scholar has also proposed a lot of solutions: have the scholar to propose to add Internet and close and carry out respective handling and adapt to the location management mode of the heterogeneous network that multiple network mixes (referring to document Assouma, A.D., Beaubrun, R., Pierre, S..Mobility management in heterogeneous wireless networks[J] IEEE Journal onSelected Areas in Communications, 2006,24 (3): 638-648), but this mode need be at apparatus for establishing between the network in twos, and too complicated, the autgmentability of network is bad; The proposition that also has a kind of unitized mobile management (UMM) technology, proposition utilizes super database (super HLR) to realize the location management of multi-protocols, the centre management node of UMM end will be deposited the lane place of each mobile subscriber's GSM, the hometown-agent-address of MIP (mobile Internet), the all-network positional informations such as destination router address of WLAN (WLAN (wireless local area network)), when the mobile subscriber being carried out the position renewal, need all carry out the location management operation to all access networks, (referring to document Haase, O., Ming Xiong; Murakami, K.Multi-protocolprofiles to support user mobility across network technologies[C] .Proceedings of the 2004IEEEInternational Conference on Mobile Data Management, 2004:100-105), though the reasonable location management function that realizes heterogeneous network of this method, but need rebulid a centre management node that performance requirement is quite high, the storage of centre management node is on a grand scale, and cost is very high; Bigger to the expense of Radio Link when carrying out the position renewal, do not possess good autgmentability yet.
Summary of the invention
Technical problem to be solved by this invention is, provide a kind of can be simply and realize the wireless isomer network system and the unitized position management method of wireless isomer network of the unitized location management of wireless isomer network effectively.
The present invention solves the problems of the technologies described above the technical scheme that is adopted to be, wireless isomer network system, comprise the upper strata gateway that each heterogeneous network, user terminal, unitized mobile management database, corresponding each heterogeneous network are provided with, described upper strata gateway comprises position update module, call processing module;
Described user terminal is used for, and periodically independently locatees, and obtains the geographical position coordinates of user terminal, selects wireless network again, and the position update module in selected wireless network sends the position updating record; Described position updating record comprises the geographical position coordinates and the user ID of user terminal; The geographical position coordinates of described user terminal is made up of longitude, the latitude at user terminal place; When user terminal was call subscriber terminal, call subscriber terminal selected wireless network to send call request, comprises calling subscriber identification and CSI called subscriber identification in the described call request; When user terminal is called user terminal, after called user terminal receives call request, return call answering;
Described unitized mobile management database is used for, receive the position updating record after, extract the geographical position coordinates of user terminal, be stored under the user ID of this user terminal correspondence; After receiving the paging request, search corresponding geographical position coordinates, and the geographical position coordinates of called user terminal is back to the pairing call processing module of wireless network that call subscriber terminal is selected according to the user ID of called user terminal;
Described position update module is used for, receive the position updating record that user terminal sends after, to unitized mobile management database transmission position updating record;
Described call processing module is used for, and when call processing module is the calling processing module, after the calling processing module receives the call request that call subscriber terminal sends, sends the paging request to unitized mobile management database; After the calling processing module receives the geographical position of the called user terminal that unitized mobile management database returns, add the called user terminal geographical position in the call request sending to called call processing module; When call processing module is called call processing module, after called call processing module receives the call request of having added the called user terminal geographical position, extract the geographical position coordinates of called user terminal, geographical position coordinates according to called user terminal, calculate the aerial information that covers called user terminal, and send call request to called user terminal.
Among the present invention, each heterogeneous network inter-process keeps existing processing mode constant, only increase the treatment step of new upper strata gateway after the mobile management database processing in each heterogeneous network, the upper wire Central Shanxi Plain of each heterogeneous network stores the geographical position coordinates of interior each lane place management node of Home Network or base station; User terminal both can be that the single mode user terminal also can be a multimode user terminal; The single mode user terminal when selecting wireless network, can select wireless network to have only one, and multimode user's optional network in the optional network specific digit scope carries out the position to be upgraded or paging.
Be applied to the unitized position management method of wireless isomer network of said system, comprise that user position update is handled, subscriber paging is handled, it is characterized in that described user position update is handled and be may further comprise the steps:
A1, user terminal are periodically independently located, and obtain the geographical position coordinates of this user terminal; The geographical position coordinates of described user terminal is made up of longitude, the latitude at user terminal place;
A2, wireless network of user terminal selecting, the position update module in selected wireless network sends the position updating record, and described position updating record comprises the geographical position coordinates and the user ID of user terminal;
After a3, position update module receive the position updating record, transmit this position updating record to unitized mobile management database;
After a4, mobile management database receive the position updating record, extract the geographical position coordinates of user terminal, be stored under the user ID of this user terminal correspondence;
Described subscriber paging is handled and be may further comprise the steps:
B1, call subscriber terminal select wireless network to send call request, comprise calling subscriber identification and CSI called subscriber identification in the described call request;
After b2, calling terminal call processing module receive call request, send the paging request to unitized mobile management database, described paging request comprises the user ID of called user terminal;
After b3, unitized mobile management database receive the paging request, search corresponding geographical position coordinates according to the user ID of called user terminal, and will be back to the calling terminal call processing module;
B4, calling processing module are added called subscriber's geographical position coordinates in sending call request, send to the called end call processing module and added the call request of called subscriber's geographical position coordinates;
After b5, called end call processing module receive the call request of having added called subscriber's geographical position coordinates, extract the geographical position coordinates of called user terminal, calculate the aerial information that covers called user terminal and send call request to it according to the geographical position coordinates of called user terminal;
After b6, called user terminal receive call request, return call answering, call subscriber terminal and called user terminal are set up communication link.
The geographical position coordinates of a unitized mobile management database stored user terminal of the present invention, the all-network positional information that does not need to place user terminal has reduced the requirement to database node; In position renewal processing procedure, only need to select arbitrarily a network to report, handle, greatly reduce the resource overhead of Radio Link and do not need that all access networks are all carried out the position renewal.Carry out distributed treatment in page phase by the call processing module of each heterogeneous network, and do not change existing network interior location management processing flow process, have favorable expansibility, compatibility.
Concrete, described user ID is a Subscriber Number.
Concrete, user terminal is independently located according to the broadcast message of network.More specifically, user terminal positions according to the broadcast message of some networks, or carries out alignment by union according to the broadcast message of several networks.As, user terminal adopts time-based periodicity algorithm to carry out GPS (global positioning system) localization process.
Radio Link expense when upgrading in order further to dip, after step a1, before the step a2, user terminal also carries out an anticipation that whether sends the position updating record to be handled, whether geographical position coordinates and this geographical position coordinates that obtains when the more last position of user terminal is upgraded meet more new standard of position, in this way, then enter step a2, as not, then return step a1; User terminal is sending the position updating record simultaneously among the step a2, and the geographical position coordinates that obtains with this in this locality is replaced geographical position coordinates and the storage when once the position is upgraded.Like this, when user terminal does not take place in the time under the situation of big variation at one-period, user terminal is not initiated the report that the position is upgraded, and has greatly reduced the Radio Link expense in the hybrid network.
The invention has the beneficial effects as follows, when not changing existing network interior location management approach, can finish the location management of heterogeneous network well, have good compatibility; Following emerging network also can use this method completing place management function, has good opening; There is not too complicated conversion and the limiting network scale has favorable expansibility.Though the positional information of user terminal also is to leave UMM (unitized mobile management) database in, but owing to what deposit is geographical location information, rather than all-network positional information (for example depositing the lane place of GSM, the hometown-agent-address of MIP, the destination router address of WLAN simultaneously), so compare with existing UMM database, the data of database storage size will reduce greatly; And because the position upgrade to be handled and only to be selected only network to carry out once-through operation, rather than all networks that can insert all carry out the location management operation, so the expense on the Radio Link also reduces greatly.
Description of drawings
Fig. 1 is a heterogeneous network system schematic diagram of the present invention;
Fig. 2 is concrete wireless isomer network scene in this enforcement;
Fig. 3 is that treatment step is upgraded in position of the present invention;
Fig. 4 is a call treatment step of the present invention;
Fig. 5 is that the storage size of the embodiment of the invention and existing unitized location management database compares;
Fig. 6 is that the Radio Link expense of the embodiment of the invention and existing unitized location management compares.
Embodiment
As shown in Figure 1, wireless isomer network system, the upper strata gateway that each heterogeneous network (GSM network, UNTS network, WLAN, satellite network and other new network), unitized mobile management database, corresponding each heterogeneous network are provided with, the upper strata gateway comprises position update module, call processing module; Each heterogeneous network internal structure and processing are constant according to its agreement, comprise base station (BS), mobile switching centre (MSC) as existing GSM network, attaching position register (HLR), Visited Location Registor (VLR), existing UNTS (universal mobile telecommunications system) network comprises base station (BS), Node B (B node), RNC (radio network controller), existing WLAN (WLAN) comprises AP (access point), MAP (MAP), and existing satellite network comprises satellite, ground gateway station.The present invention only mobile management in each heterogeneous network handles the treatment step that increases new upper strata gateway afterwards, mobile management is handled and is finished by HLR/VLR in existing GSM network, finish by RNC in the existing UNTS network, finish by MAP among the existing WLAN, finish by the ground gateway station in the existing satellite network.The upper wire Central Shanxi Plain of each heterogeneous network stores the geographical position coordinates of interior each lane place management node of Home Network or base station.
Provide implementation method of the present invention in the concrete wireless isomer network scene below:
As shown in Figure 2, user 1 is airborne user, does not have ground network to cover, and can only insert by marine satellite.User 2 is ground based mobile subscribers, is covered by GSM network, WLAN and satellite network simultaneously, and each network always is provided with its upper strata gateway.Two users carry out remote video communication.The upper strata gateway of satellite network has obtained satellite ephemeris information can calculate the particular location coordinate that satellite is carved at a time, the upper strata gateway of WLAN has obtained the position coordinates of each WAP (wireless access point) (AP) in the Home Network, and the upper strata gateway of GSM network has obtained the position coordinates of interior MSC of Home Network and base station; User 1 and user 2 are multimode terminals, and mode that can software radio inserts certain or a plurality of wireless network, and can vertically switch between heterogeneous networks; Unitized location management database can close with the upper wire of all-network and communicate, and deposits data such as user position information.
The handling process of position update stage, as shown in Figure 3:
1, the terminal of airborne user 1 and terrestrial user 2 is periodically independently located according to the broadcast message of network by certain algorithm separately, obtain respectively self geographical position coordinates (X1, Y1), (X2, Y2);
Position coordinates and this coordinate that records when 2, the user upgrades according to the last position of self record judge whether to initiate more new technological process of position, initiate if desired the position more new technological process then enter step 3, if do not need, then return step 1;
Whether geographical position coordinates and the distance between this geographical position coordinates that obtains when the more last position of user terminal is upgraded judge whether to meet more new standard of position greater than threshold value, as greater than then meeting more new standard of position, do not meet more new standard of position otherwise be judged as; Geographical position coordinates when last position is upgraded and the distance between this geographical position coordinates that obtains are
Wherein, r is the distance of two coordinates, the latitude when longitude, the Y1 when X1 is the renewal of last position is the renewal of last position, and X2 is this latitude that obtains for this longitude that obtains, Y2.The value of threshold value is
Wherein, R is a threshold value, and v is the speed of user terminal, C
UBe the Radio Link expense of a location update operations, C
PBe the Radio Link expense of a paging operation, λ is the rate of arriving calls of user terminal;
3, airborne user 1 selects satellite network to initiate the position updating record, include own user ID and geographical position coordinates (X1 in the updating record of position, Y1), the position updating record sends to the ground gateway station via satellite, handles through the position in upper wire Central Shanxi Plain update module again; Terrestrial user 2 is selected the good GSM network of spreadability, by initiating the position updating record, with the position coordinates (X2 of oneself, Y2) send to HLR (attaching position register) by base station and MSC (mobile switching centre), handle through the position in upper wire Central Shanxi Plain update module, two users are once record in this coordinate of terminal local record and deletion simultaneously again; The position in the two upper wire Central Shanxi Plain is upgraded mould and is sent the position updating record to the UMM database respectively, with user identification id 1 and respective coordinates (X1, Y1), (X2 Y2) is sent to the UMM database for user identification id 2 and respective coordinates;
4, the upper strata gateway of two users place network receive report back to the UMM database send the user position coordinate data (X1, Y1) and (X2, Y2) and two users' user identification id 1, id2;
5, UMM receives that the position coordinates of recording user after the information is under user ID separately.
The processing in subscriber paging stage, as shown in Figure 4:
1, airborne calling subscriber 1 has only satellite to cover, so select satellite network (network 1) to call out, sends call request to network via satellite, and call request comprises information calling identification id1 and called identification id2;
2, network 1 called gateways is initiated paging request inquiry called subscriber geographical position coordinates to the UMM database after receiving call request, and the paging request comprises called identification id2;
3, the UMM database returns called subscriber 2 position coordinates (X2, Y2) to network 1 calling module;
4, network 1 called gateways selects the bigger WLAN of bandwidth to insert as called network according to type of service (video), send call request to the upper strata of WLAN gateway (network 2 calling modules), also include coordinate (X2, Y2) in the call request herein;
5, network 2 calling modules receive after second call request that (X2 Y2) obtains the IP address of its place access point, and sends call request by AP to the called subscriber according to called subscriber's position coordinates;
6, called subscriber 2 returns call answering after receiving call request, sets up link, carries out transfer of data.
UMM database of the present invention is only deposited user's geographical location information (longitude and latitude), closes at each heterogeneous network network diagram and does not also deposit user ID and geographical position coordinates; And existing UMM framework will be deposited to insert in central database and defend asterisk, insert the gateway station number, honeycomb belonging positions district numbering and base station numbering, network location information such as the affiliated router ip address of WLAN; Though and do not have Centroid in the internet gateway framework, each heterogeneous network will independently be deposited corresponding information separately.According to test result, the storage size of the UMM database of present embodiment only needs 0.3 times of existing each the self contained data base summation of UMM framework under central database scale or internet net purchase framework, can finish the normalization location management well, as shown in Figure 5.In the position update stage, what the present invention reported is geographical position coordinates, so only needing to select arbitrarily a suitable network to carry out position renewal processing gets final product, and other two kinds of existing modes need the positional information of each heterogeneous network of upgrading simultaneously, so the all-network that the user can insert all needs to carry out location update operations.In the example as shown in Figure 2, the network that user 2 can select to insert has 3 kinds, adopt existing location updating method need carry out three times and upgrade operation, and utilized location updating method of the present invention only to need once to upgrade operation, the Radio Link expense is 0.3 times of location updating method under existing UMM framework and the internet net purchase framework, as shown in Figure 6.
Claims (10)
1. wireless isomer network system, comprise each heterogeneous network, user terminal, it is characterized in that also comprise the upper strata gateway that unitized mobile management database, corresponding each heterogeneous network are provided with, described upper strata gateway comprises position update module, call processing module;
Described user terminal is used for, and periodically independently locatees, and obtains the geographical position coordinates of user terminal, selects wireless network again, and the position update module in selected wireless network sends the position updating record; Described position updating record comprises the geographical position coordinates and the user ID of user terminal; The geographical position coordinates of described user terminal is made up of longitude, the latitude at user terminal place; When user terminal was call subscriber terminal, call subscriber terminal selected wireless network to send call request, comprises calling subscriber identification and CSI called subscriber identification in the described call request; When user terminal is called user terminal, after called user terminal receives call request, return call answering;
Described unitized mobile management database is used for, receive the position updating record after, extract the geographical position coordinates of user terminal, be stored under the user ID of this user terminal correspondence; After receiving the paging request, search corresponding geographical position coordinates, and the geographical position coordinates of called user terminal is back to the pairing call processing module of wireless network that call subscriber terminal is selected according to the user ID of called user terminal;
Described position update module is used for, receive the position updating record that user terminal sends after, to unitized mobile management database transmission position updating record;
Described call processing module is used for, and when call processing module is the calling processing module, after the calling processing module receives the call request that call subscriber terminal sends, sends the paging request to unitized mobile management database; After the calling processing module receives the geographical position of the called user terminal that unitized mobile management database returns, add the called user terminal geographical position in the call request sending to called call processing module; When call processing module is called call processing module, after called call processing module receives the call request of having added the called user terminal geographical position, extract the geographical position coordinates of called user terminal, geographical position coordinates according to called user terminal, calculate the aerial information that covers called user terminal, and send call request to called user terminal.
2. wireless isomer network system according to claim 1, it is characterized in that user terminal is independently located and is specially: the broadcast message according to some networks positions, or carries out alignment by union according to the broadcast message of several networks.
3. wireless isomer network system according to claim 1, it is characterized in that, described user terminal also is used for, after obtaining the geographical position coordinates of user terminal, position update module in selected wireless network sends before the updating record of position, carrying out an anticipation of whether initiating the position updating record handles: geographical position coordinates and this geographical position coordinates that obtains when last position is upgraded meet more new standard of position, then send the position updating record, as not, do not send the position updating record; User terminal is when sending the position updating record, and the geographical position coordinates that obtains with this in this locality is replaced geographical position coordinates and the storage when once the position is upgraded.
4. as wireless isomer network system as described in the claim 3, it is characterized in that, described user terminal also is used for, whether geographical position coordinates and the distance between this geographical position coordinates that obtains when upgrading by more last position judge whether to meet more new standard of position greater than threshold value, as greater than then meeting more new standard of position, do not meet more new standard of position otherwise be judged as; Geographical position coordinates when last position is upgraded and the distance between this geographical position coordinates that obtains are
Wherein, r is the distance of two coordinates, the latitude when longitude, the Y1 when X1 is the renewal of last position is the renewal of last position, and X2 is this latitude that obtains for this longitude that obtains, Y2.
5. as wireless isomer network system as described in the claim 4, it is characterized in that the value of described threshold value is
Wherein, R is a threshold value, and v is the speed of user terminal, C
UBe the Radio Link expense of a location update operations, C
PBe the Radio Link expense of a paging operation, λ is the rate of arriving calls of user terminal.
6. the unitized position management method of wireless isomer network comprises and puts user position update processing, subscriber paging processing, it is characterized in that described user position update is handled and be may further comprise the steps:
A1, user terminal are periodically independently located, and obtain the geographical position coordinates of this user terminal; The geographical position coordinates of described user terminal is made up of longitude, the latitude at user terminal place;
A2, user terminal selecting wireless network, the position update module in selected wireless network sends the position updating record, and described position updating record comprises the geographical position coordinates and the user ID of user terminal;
After a3, position update module receive the position updating record, transmit this position updating record to unitized mobile management database;
After a4, mobile management database receive the position updating record, extract the geographical position coordinates of user terminal, be stored under the user ID of this user terminal correspondence;
Described subscriber paging is handled and be may further comprise the steps:
B1, call subscriber terminal select wireless network to send call request, comprise calling subscriber identification and CSI called subscriber identification in the described call request;
After b2, calling processing module receive call request, send the paging request to unitized mobile management database, described paging request comprises the user ID of called user terminal;
After b3, unitized mobile management database receive the paging request, search corresponding geographical position coordinates according to the user ID of called user terminal, and will be back to the calling processing module;
B4, calling processing module are added called subscriber's geographical position coordinates in sending call request, and send to called call processing module and added the call request of called subscriber's geographical position coordinates;
After b5, called call processing module receive the call request of having added called subscriber's geographical position coordinates, extract the geographical position coordinates of called user terminal, calculate the aerial information that covers called user terminal and send call request to it according to the geographical position coordinates of called user terminal;
After b6, called user terminal receive call request, return call answering, call subscriber terminal and called user terminal are set up communication link.
7. as the unitized position management method of wireless isomer network as described in the claim 6, it is characterized in that user terminal is independently located and is specially: the broadcast message according to some networks positions, or carries out alignment by union according to the broadcast message of several networks.
8. as the unitized position management method of wireless isomer network as described in the claim 6, it is characterized in that, after step a1, before the step a2, user terminal also carries out an anticipation that whether sends the position updating record to be handled, and whether geographical position coordinates and this geographical position coordinates that obtains when the more last position of user terminal is upgraded meet more new standard of position, in this way, then enter step a2,, then return step a1 as not; User terminal is after sending the position updating record among the step a2, and the geographical position coordinates that obtains with this in this locality is replaced geographical position coordinates and the storage when once the position is upgraded.
9. as the unitized position management method of wireless isomer network as described in the claim 8, it is characterized in that, whether geographical position coordinates and the distance between this geographical position coordinates that obtains when user terminal upgrades by more last position judge whether to meet more new standard of position greater than threshold value, as greater than, then meet more new standard of position, otherwise, be judged as and do not meet more new standard of position; Geographical position coordinates when last position is upgraded and the distance between this geographical position coordinates that obtains are
Wherein, r is the distance of two coordinates, the latitude when longitude, the Y1 when X1 is the renewal of last position is the renewal of last position, and X2 is this latitude that obtains for this longitude that obtains, Y2.
10. as the unitized position management method of wireless isomer network as described in the claim 9, it is characterized in that the value of described threshold value is
Wherein, R is a threshold value, and v is the speed of user terminal, C
UBe the Radio Link expense of a location update operations, C
PBe the Radio Link expense of a paging operation, λ is the rate of arriving calls of user terminal.
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| CN104469872B (en) * | 2013-09-13 | 2018-05-11 | 中国电信股份有限公司 | Data service bi-directional handover method, system and the dual-mode terminal of cross-system |
| CN112449304A (en) * | 2019-09-05 | 2021-03-05 | 中国电信股份有限公司 | Terminal positioning method, network side system and system |
| CN111147788A (en) * | 2019-10-22 | 2020-05-12 | 广东小天才科技有限公司 | Screen capture sharing method based on video call and wearable device |
| CN112995912A (en) * | 2021-03-08 | 2021-06-18 | 军事科学院***工程研究院网络信息研究所 | Position updating method for multi-beam satellite mobile communication system |
| CN114186703A (en) * | 2021-12-09 | 2022-03-15 | 北京中电普华信息技术有限公司 | Positioning method, device, equipment and computer readable storage medium |
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| CN102186244B (en) | 2013-09-25 |
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