CN100342740C - Data transmission system and data transmission method - Google Patents
Data transmission system and data transmission method Download PDFInfo
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- CN100342740C CN100342740C CNB200510068370XA CN200510068370A CN100342740C CN 100342740 C CN100342740 C CN 100342740C CN B200510068370X A CNB200510068370X A CN B200510068370XA CN 200510068370 A CN200510068370 A CN 200510068370A CN 100342740 C CN100342740 C CN 100342740C
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Abstract
A data transfer system and its method, in which a plurality of U-plane controllers are connected to one C-plane controller and the number of the U-plane controllers is increased or decreased to realize a network structure of a low cost and to meet various conditions and requirements. Each U-plane controller sends at lease one of network traffic conditions, resource using conditions within itself and trouble conditions to the C-plane controller. The C-plane controller selects an optimum U-plane link for providing a user terminal with services and requests a core network to carry out a U-plane link exchange via an optimum U-plane controller. The core network carries out the U-plane link exchange.
Description
Technical field
The present invention relates to the data transmission system data transmission method of unifying, wherein C face plate controller and U face plate controller are separated from one another, and the C face plate controller is selected the optimal transmission circuit.
Background technology
AUTRAN (universal terrestrial radio electricity access network) is positioned at UE (subscriber equipment) or such as the user terminal of mobile phone etc. and such as the node between the CN (core network) of switching network etc., and realizes the interconnection between their interface.RNC (radio network controller) accommodates a plurality of radio base stations via Iub interface, and carry out the multiple processing that relates to control channel (CCH) and traffic channel (TCH), wherein said Iub interface is used for radio base station is connected to RNC, described control channel is used for communicating control information or data, and described traffic channel is used for transmitting user data.In this situation, share common signal channel between the user usually, and distribute independent channel to each user.
In recent years, in 3GPP (third generation partner program) standardization, the all-IP networking (all IP networking) as the RNC of the controller of radio base station there is ardent discussion.Because the utilization rate on expection U plane (user data plane) increases in the future, so must consider wherein C plane (control plane) and U plane RNC separated from one another.New problem has appearred in the RNC that realizes all-IP networking and C plane/U planar separation.That is to say, not only need RNC can guarantee the operation that legacy system is realized, and can control a plurality of U face plate controllers by a C face plate controller, this considers under C plane/U planar separation state.New problem does not provide efficient resource using system clearly in the 3GPP standardization hereto.
As mentioned above, C represents control plane in the plane, promptly is such link, and the control messages data are passed through this link in the equipment room transmission, and U plane representative of consumer datum plane, promptly are such links, and various content-data reality are transmitted between the user by this link.
Usually, in an equipment, realized being used to control the function on C plane and U plane, and the link that flows through data is by identical route.In order to realize satisfying the network configuration of various extensibilities, the controller that will be used for C plane and U plane is separated from one another.This notion is called as planar separation or C plane/U planar separation.
Another kind of technology is disclosed in Japanese Patent Laid Open Publication No.2004-48209.That is, when in Wideband Code Division Multiple Access (WCDMA) communication system, be used for the U face plate controller of user data when busy, the part that this U face plate controller is handled is disposed by another backup U face plate controller, to keep this processing.As a result, when the prospective users data increase, can easily the processing of user data in the network be distributed, to prevent the whole system collapse.
But, in this legacy system, still have problems.Promptly, radio base station must be corresponding one by one with the U face plate controller, if and can be with the processing load distribution in the U face plate controller layer, then can not from a plurality of U face plate controllers, select a U face plate controller that is used to realize the optimal transmission circuit according to the increase or the minimizing of user data traffic in the coverage.
Summary of the invention
Therefore, because the problems referred to above of the prior art, the purpose of this invention is to provide a kind of data transmission system, wherein, the present invention includes a C face plate controller and a plurality of U face plate controllers that are connected to this C face plate controller, therefore the present invention can change the number of U face plate controller, to realize cheaply network configuration and to satisfy various conditions and demand, for example various extensibilities.
According to an aspect of the present invention, a kind of data transmission system is provided, comprise: the user terminal that be connected to radio base station, be connected to a plurality of user data plane controllers of radio base station, be connected to the control plane controller of user data plane controller via network, and the core network that is connected to the user data plane controller via described network, each user data plane controller comprises the status report device, be used to monitor the state of network traffic at special time place, resource user mode in this user data plane controller and at least one state in the malfunction, and the state information that monitors is sent to the control plane controller, the control plane controller comprises: the state information receiver is used for the status report device receiving status information from the user data plane controller; The user data plane link selector is used on the basis of the received state information of state information receiver, selects to be used for providing to user terminal the optimal user plane link of service; With user data plane link exchange command device, the user data plane link that is used to ask core network to be carried out via optimal user datum plane controller exchanges, core network comprises the user data plane Link-Switch, is used to carry out the exchange of user data plane link.
In data transmission system, the status report device of user data plane controller monitors state of network traffic, the resource user mode in this user data plane controller and at least one state in the malfunction at special time place, and on the basis of the report request of control plane controller, the state information that is monitored is sent to the control plane controller.
In data transmission system, user terminal comprises sub-district moving communication device, be used for when the user terminal that is in the CELL_PCH state moves to another radio base station, the sub-district movable information is sent to the control plane controller, and the control plane controller also comprises sub-district movable information receiver, is used to receive the sub-district movable information that sends from the sub-district moving communication device of user terminal.User data plane link exchange command device is on the basis of the received sub-district movable information of sub-district movable information receiver, in the U face plate controller which radio base station of inspection moving target be assigned to, and the request core network is carried out the user data plane link exchange via optimal user datum plane controller.
According to a further aspect in the invention, a kind of data transmission method is provided, comprise the user terminal that will be connected to radio base station, be connected to a plurality of user data plane controllers of radio base station, be connected to the control plane controller of user data plane controller via network, and the core network that is connected to the user data plane controller via described network, described method comprises: step 1, be used for status report device by each user data plane controller, monitor the state of network traffic at special time place, resource user mode in this user data plane controller and at least one state in the malfunction, and the state information that monitors sent to the control plane controller; Step 2 is used for the state information receiver by the control plane controller, from the status report device receiving status information of user data plane controller; Step 3 is used for the user data plane link selector by the control plane controller, on the basis of the received state information of state information receiver, selects to be used for providing to user terminal the optimal user plane link of service; Step 4 is used for the user data plane link exchange command device by the control plane controller, and the request core network is carried out the user data plane link exchange via optimal user datum plane controller; With step 5, be used for user data plane Link-Switch by core network, carry out the exchange of user data plane link.
In data transmission method, in step 1, the status report device of user data plane controller monitors state of network traffic, the resource user mode in this user data plane controller and at least one state in the malfunction at special time place, and on the basis of the report request of control plane controller, the state information that is monitored is sent to the control plane controller.
Data transmission method also comprises: step 6, be used for sub-district moving communication device by user terminal, and when the user terminal that is in the CELL_PCH state moves to another radio base station, the sub-district movable information is sent to the control plane controller; With step 7, be used for sub-district movable information receiver by the control plane controller, reception is from the sub-district movable information of the sub-district moving communication device transmission of user terminal, and in step 4, user data plane link exchange command device is on the basis of the received sub-district movable information of sub-district movable information receiver, in the U face plate controller which radio base station of inspection moving target be assigned to, and the request core network is carried out the user data plane link exchange via optimal user datum plane controller.
In data communication system according to the present invention and method thereof, a plurality of U face plate controllers are connected to a C face plate controller, and the number that increases or reduce the U face plate controller is to realize cheaply network configuration and to satisfy various conditions and demand.
Description of drawings
In conjunction with the accompanying drawings, from following detailed, purpose of the present invention, feature and advantage will become clearer, wherein:
Fig. 1 is the block diagram of data transmission system according to an embodiment of the invention;
Fig. 2 is the block diagram of an embodiment of U face plate controller shown in Figure 1;
Fig. 3 is the block diagram of an embodiment of C face plate controller shown in Figure 1;
Fig. 4 is the block diagram that has exchanged U plane link in the data transmission system shown in Figure 1;
Fig. 5 is the block diagram that has exchanged U plane link in the data transmission system shown in Figure 1 again;
Fig. 6 shows the flow chart of the process that is used for exchanging as shown in Figure 1 and Figure 4 U plane link;
Fig. 7 shows the flow chart of the process that is used for exchanging as shown in Figure 5 U plane link.
Embodiment
Description has illustrated data transmission system according to an embodiment of the invention among Fig. 1.
In Fig. 1, data transmission system comprises two radio base stations 1 and 2, two U face plate controllers 11 and 12, C face plate controller 20, core network 30 and wireless UE (subscriber equipment or terminal) 40, wherein U face plate controller 11 is connected to radio base station 1, and U face plate controller 12 is connected to radio base station 1 and 2.
C face plate controller 20 and core network 30 each all via network 100 and two U face plate controllers 11 and 12 couplings.
U face plate controller 11 and 12 is assigned to C face plate controller 20.Radio base station 1 belongs to U face plate controller 11, and radio base station 2 belongs to U face plate controller 12.
As shown in Figure 1, UE 40 is in PS (packet service) the call communication state that uses radio base station 1 and U face plate controller 11 now, and U plane link is carried out and the communicating by letter of UE 40 via U face plate controller 11 and radio base station 1, for example sends and receives.
In Fig. 2, show an embodiment of U face plate controller 11 shown in Figure 1 or 12, it comprises and is used for stored program, the memory 202 of data etc., status report device 204, the controller 201 that is used for control storage 202 and status report device 204, and controller 201, the bus 203 that memory 202 and status report device 204 are placed thereon, wherein status report device 204 is used for the monitoring network flow status, resource user mode in the U face plate controller, in the states such as malfunction at least one, and the C face plate controller 20 of being assigned to this U face plate controller the status report that monitors.
In Fig. 3, show an embodiment of C face plate controller 20 shown in Figure 1, it comprises and is used for stored program, the memory 302 of data etc., be used for from the state information receiver 304 of each U face plate controller 11 or 12 receiving state reports, be used to select the U plane link selector 305 of optimum U plane link, be used for receiving the movable information receiver 306 of sub-district movable information from UE 40, be used to ask the U plane link exchange command device 307 of the U plane link exchange of U face plate controller 11 or 12, be used for control storage 302, state information receiver 304, U plane link selector 305, the controller 301 of sub-district movable information receiver 306 and U plane link exchange command device 307, and controller 301, memory 302, state information receiver 304, U plane link selector 305, the bus 303 that sub-district movable information receiver 306 and U plane link exchange command device 307 are placed thereon.
Describe the operation of the U plane link exchange in the data transmission system according to an embodiment of the invention in detail referring now to Fig. 1 and Fig. 4 to Fig. 7.
At first, as Fig. 1 and shown in Figure 6, according to the standardized regulation of 3RPP, when in the PS of certain period call communication, not having grouped data to be transmitted, allow user terminal to change into the CELL_PCH state from the CELL_DCH state, so that carry out effective use, and save the transmitted power of user terminal to radio resource.In the CELL_PCH state, discharge from UE 40 to radio base station 1 and from the U plane link (step S601) of radio base station 1 to U face plate controller 11.U plane link is a channel resource independent in the radio communication.
In this embodiment, the state that CELL_DCH state representative of consumer terminal is being communicated by letter, and in this state, U plane link is extended (stretch) or is connected.CELL_PCH state representative of consumer terminal is only waited for the state of radio paging (paging), and in this state, U plane link does not extend or disconnect connection.
By this way, in the CELL_PCH state, seem that user terminal is forbidden temporarily, saving useless resource from damage, and save radio resource from network side.
As mentioned above, when the connection on U plane is not carried out in certain period in the back that begins the user to communicate by letter, allow user terminal to change into the CELL_PCH state, to reach the purpose of effective use resource from the CELL_DCH state.
For from U face plate controller 11 via the U plane link of network 100 to core network 30, because can not learning, the RNC side when downlink grouped data can be sent to the RNC side, so in step S602, be maintained in UE 40 employed U plane link when the CELL_DCH state is changed into the CELL_PCH state for U face plate controller 11.
In Fig. 4, show between radio base station 1 and the core network 30 a embodiment via the U plane link exchange of U face plate controller 11 or 12, promptly, although after UE40 shown in Figure 1 becomes the CELL_PCH state from the CELL_DCH state, the UE 40 that is in the CELL_PCH state still belongs to radio base station 1, still exchanges to U face plate controller 12 in the mode of network side guiding (network-side-leading) from as shown in Figure 1 U face plate controller 11.
In Fig. 4 and Fig. 6, U face plate controller 11 or 12 status report device 24 monitor current state of network traffic, the resource user mode in the U face plate controller, malfunction etc., and the result (step S603) who periodically monitors to 204 assigned C face plate controllers 20 reports of status report device.
In C face plate controller 20, U plane link selector 305 selects to be used for providing to UE 40 the optimum U plane link (step S604) of service on the basis of the status report that state information receiver 304 receives from each U face plate controller.
When C face plate controller 20 is judged between radio base stations 1 and the core network 30 via the current U plane link of U face plate controller 11 when optimum, wherein just used this U plane link at UE 40 before the CELL_DCH state is changed into the CELL_PCH state, C face plate controller 20 can not send any request to core network 30.On the other hand, when C face plate controller 20 is judged between radio base stations 1 and the core network 30 via the current U plane link of U face plate controller 12 when optimum, U plane link exchange command device 307 sends the link exchange request of U plane to core network 30, to carry out the U plane link exchange (step S605) from U face plate controller 11 to U face plate controllers 12 by the message of using redetermination.
In this situation, the such new information of " message of redetermination " expression, it is used for asking the flow status while of core network 30 in C face plate controller 20 control U face plate controllers 11 and 12, based on the flow status of U face plate controller 11 and 12, transfer of data is arrived different U face plate controllers.Because in legacy system, do not consider C plane/U planar separation, so this message redetermination in native system.
When receiving the link exchange request of U plane from C face plate controller 20, core network 30 exchanges U plane link (catching S606) by changing to U face plate controller 12 from U face plate controller 11.In addition, in this embodiment, when U plane link is exchanged, because the calling link information in core network side (being the RNC side) consults to finish, so do not need from U face plate controller 12 to core network 30 new C plane to be provided with, and only carry out the U plane link change in the sending direction of grouped data.
When having produced the upstream or downstream grouped data,, reset the radio link resource (step S607) of each individual channel via U face plate controller 12.
In Fig. 5, show radio base station 1 or 2 and core network 30 between via another mutual embodiment of the U plane link of U face plate controller 11 or 12, promptly after UE shown in Figure 1 40 changes into the CELL_PCH state from the CELL_DCH state, a regional movement that is subordinated to radio base station 1 as the UE 40 that is in the CELL_PCH state is when belonging to another zone of radio base station 2, by using message " cell update " as triggering, be exchanged for the link of radio base station 2 and U face plate controller 12 from the link of as shown in Figure 1 radio base station 1 and U face plate controller 11, wherein message " cell update " is to send to as the C face plate controller 20 of RNC side from UE 40.
In Fig. 5 and Fig. 7, the regional movement that is subordinated to radio base station 1 as the UE 40 that is in the CELL_PCH state is when belonging to another zone of radio base station 2, in step S701, UE 40 is according to the standardized agreement of 3GPP, and 20 notice UE 40 have moved to another sub-district to the C face plate controller.
In C face plate controller 20, when sub-district movable information receiver 306 when UE 40 receives the sub-district movable information, U plane link exchange command device 307 is on the basis of the sub-district movable information that sub-district movable information receiver 306 receives, in U face plate controller 11 or 12 which radio base station 2 of inspection moving target be assigned to, and judge whether the U face plate controller that is checked through is the U face plate controller 11 that UF 40 is connected when the CELL_DCH state is changed into the CELL_PCH state.When judging that the U face plate controller of being checked is different from previous U face plate controller 11, U plane link exchange command device 307 sends the link exchange request of U plane to core network, to carry out the U plane link exchange (step S702) from U face plate controller 11 to U face plate controllers 12.
When receiving the link exchange request of U plane from C face plate controller 20, core network 30 exchanges U plane link (step S703) by changing to U face plate controller 12 from U face plate controller 11.
When producing the upstream or downstream grouped data,, reset the radio link resource (step S704) of each individual channel via U face plate controller 12.
In the above-described embodiments, by redetermination from C face plate controller 20 to core network 30 interface, use the location information communication function of the UE 40 of preexist, only via optimum U face plate controller exchange U plane link, and do not need to add any change, thereby simplified UE 40 from the transmission route of U panel data to preexist and each radio base station.In addition, in the network configuration of using C plane/U planar separation, on the basis of the status report of U face plate controller, can carry out the control of flow control and route.
Therefore, in traditional system, when UE 40 when the CELL_DCH state is changed into the CELL_PCH state, do not change from RNC to the core network 30 U plane link.When UE40 moves to another sub-district that belongs to different RNCs, do not carry out the link exchange of U plane yet.Therefore, in traditional system, when the UE 40 that is in the CELL_PCH state moves to different districts, when after turning back to the CELL_DCH position, communicating then, the U panel data once had been sent to previous RNC, and UE 40 has changed this RNC in the CELL_PCH state, and these U panel datas must be transferred to the affiliated now new RNC of UE 40.Therefore, according to the present invention, can improve the problem that occurs in interior time that reconnects of network and the route control.In addition, in traditional system, when in the standardized standard of 3GPP, carrying out from the RNC that adjusted by the 3GPP standardization via interface to the U plane link exchange of core network 30, only there is the link exchange of U plane not consider, therefore must resume operations be set from the C plane.According to the present invention, can improve this problem in the legacy system.
Though described the present invention with reference to concrete exemplary embodiment, the present invention is not subjected to the restriction of these embodiment, but is defined by the claims.Be also to be understood that those skilled in the art can change and revise these embodiment, and do not depart from the scope of the present invention and spirit.For example, the partial function of a U face plate controller comprises the function of C face plate controller.In addition, the program that is used for allowing messaging device to carry out all or part of processing operation in the above preferred embodiment is also included among the present invention.
Claims (8)
1. data transmission system comprises:
User terminal will be connected to radio base station;
A plurality of user data plane controllers are connected to described radio base station;
The control plane controller is connected to described user data plane controller via network; With
Core network is connected to described user data plane controller via described network,
Each user data plane controller comprises the status report device, be used for monitoring state of network traffic, the resource user mode in this user data plane controller and at least one state of malfunction at special time place, and the state information that monitors is sent to described control plane controller
Described control plane controller comprises:
The state information receiver is used for receiving described state information from the described status report device of described user data plane controller;
The user data plane link selector is used on the basis of the received described state information of described state information receiver, selects to be used for providing to described user terminal the optimal user plane link of service; With
User data plane link exchange command device, the user data plane link that is used to ask described core network to be carried out via optimal user datum plane controller exchanges,
Described core network comprises the user data plane Link-Switch, is used to carry out described user data plane link exchange.
2. data transmission system as claimed in claim 1, the described status report device of wherein said user data plane controller monitors state of network traffic, the resource user mode in this user data plane controller and at least one state in the malfunction at special time place, and on the basis of the report request of described control plane controller, the state information that is monitored is sent to described control plane controller.
3. data transmission system as claimed in claim 1, wherein said user terminal comprises sub-district moving communication device, be used for when the described user terminal that is in the CELL_PCH state moves to another radio base station, the sub-district movable information is sent to described control plane controller, and described control plane controller also comprises sub-district movable information receiver, be used to receive the described sub-district movable information that sends from the described sub-district moving communication device of described user terminal, and wherein said user data plane link exchange command device is on the basis of the received described sub-district movable information of described sub-district movable information receiver, in the described user data plane controller which inspection be assigned to as the described radio base station of the motion destination of described user terminal, and ask described core network to carry out user data plane link exchange via described optimal user datum plane controller.
4. data transmission system as claimed in claim 2, wherein said user terminal comprises sub-district moving communication device, be used for when the described user terminal that is in the CELL_PCH state moves to another radio base station, the sub-district movable information is sent to described control plane controller, and described control plane controller also comprises sub-district movable information receiver, be used to receive the described sub-district movable information that sends from the described sub-district moving communication device of described user terminal, and wherein said user data plane link exchange command device is on the basis of the received described sub-district movable information of described sub-district movable information receiver, in the described user data plane controller which inspection be assigned to as the described radio base station of the motion destination of described user terminal, and ask described core network to carry out user data plane link exchange via described optimal user datum plane controller.
5. data transmission method, comprise the user terminal that will be connected to radio base station, a plurality of user data plane controllers that are connected to described radio base station, be connected to the control plane controller of described user data plane controller and be connected to the core network of described user data plane controller that described method comprises via described network via network:
Step 1, be used for status report device by each user data plane controller, monitor state of network traffic, the resource user mode in this user data plane controller and at least one state in the diffusing barrier state at special time place, and the state information that monitors is sent to described control plane controller;
Step 2 is used for the state information receiver by described control plane controller, receives described state information from the described status report device of described user data plane controller;
Step 3 is used for the user data plane link selector by described control plane controller, on the basis of the received described state information of described state information receiver, selects to be used for providing to described user terminal the optimal user plane link of service;
Step 4 is used for the user data plane link exchange command device by described control plane controller, and the user data plane link of asking described core network to be carried out via optimal user datum plane controller exchanges; With
Step 5 is used for the user data plane Link-Switch by described core network, carries out described user data plane link exchange.
6. data transmission method as claimed in claim 5, wherein in step 1, the described status report device of described user data plane controller monitors state of network traffic, the resource user mode in this user data plane controller and at least one state in the malfunction at special time place, and on the basis of the report request of described control plane controller, the state information that is monitored is sent to described control plane controller.
7. data transmission method as claimed in claim 5 also comprises:
Step 6 is used for the sub-district moving communication device by described user terminal, when the described user terminal that is in the CELL_PCH state moves to another radio base station, the sub-district movable information is sent to described control plane controller; With
Step 7, be used for sub-district movable information receiver by described control plane controller, reception is from the described sub-district movable information of the described sub-district moving communication device transmission of described user terminal, wherein in step 4, described user data plane link exchange command device is on the basis of the received described sub-district movable information of described sub-district movable information receiver, in the described user data plane controller which inspection be assigned to as the described radio base station of the motion destination of described user terminal, and ask described core network to carry out user data plane link exchange via described optimal user datum plane controller.
8. data transmission method as claimed in claim 6 also comprises:
Step 6 is used for the sub-district moving communication device by described user terminal, when the described user terminal that is in the CELL_PCH state moves to another radio base station, the sub-district movable information is sent to described control plane controller; With
Step 7, be used for sub-district movable information receiver by described control plane controller, reception is from the described sub-district movable information of the described sub-district moving communication device transmission of described user terminal, wherein in step 4, described user data plane link exchange command device is on the basis of the received described sub-district movable information of described sub-district movable information receiver, in the described user data plane controller which inspection be assigned to as the described radio base station of the motion destination of described user terminal, and ask described core network to carry out user data plane link exchange via described optimal user datum plane controller.
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| JP2004137409 | 2004-05-06 | ||
| JP137409/2004 | 2004-05-06 | ||
| JP074507/2005 | 2005-03-16 |
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| CN100342740C true CN100342740C (en) | 2007-10-10 |
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| JP5051302B2 (en) | 2008-11-07 | 2012-10-17 | 日本電気株式会社 | Wireless communication system, gateway device, terminal allocation method, program |
| CN104080132B (en) * | 2013-03-25 | 2018-06-19 | 中国移动通信集团公司 | A kind of data processing method and equipment |
| CN107969017B (en) * | 2016-10-20 | 2020-08-21 | 中国电信股份有限公司 | Method and system for realizing network slicing |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000035154A2 (en) * | 1998-12-08 | 2000-06-15 | Tellabs Operations, Inc. | Signal processing system and hybrid switching |
| WO2002015619A1 (en) * | 2000-08-16 | 2002-02-21 | Telefonaktiebolaget Lm Ericsson (Publ) | Coordinating allocations of core network node identifiers in a cellular radio system |
| CN1466340A (en) * | 2002-06-24 | 2004-01-07 | �人��������������ι�˾ | Method for forwarding data by strategic stream mode and data forwarding equipment |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000035154A2 (en) * | 1998-12-08 | 2000-06-15 | Tellabs Operations, Inc. | Signal processing system and hybrid switching |
| WO2002015619A1 (en) * | 2000-08-16 | 2002-02-21 | Telefonaktiebolaget Lm Ericsson (Publ) | Coordinating allocations of core network node identifiers in a cellular radio system |
| CN1466340A (en) * | 2002-06-24 | 2004-01-07 | �人��������������ι�˾ | Method for forwarding data by strategic stream mode and data forwarding equipment |
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