CN1466274A - Method for forwarding data and signaling - Google Patents
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- CN1466274A CN1466274A CNA021123586A CN02112358A CN1466274A CN 1466274 A CN1466274 A CN 1466274A CN A021123586 A CNA021123586 A CN A021123586A CN 02112358 A CN02112358 A CN 02112358A CN 1466274 A CN1466274 A CN 1466274A
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Abstract
This invention provides a method for forwarding data and signaling, in which, when fault happens to TuB link between RNC and a target base station, the method can find out a transit link of trasitting other RNC and signalling and data of other base stations connecting with IP network, different RNC are connected by IuB link, RNC is connected with the base station by Jub and different base stations are connected by IuNB, on the said link, signalling and data are transmitted in the way of user data.
Description
Technical field
The present invention relates to the transfer approach of interior data of a kind of wireless communication system and signaling, particularly a kind of method of transmitting data and signaling by radio communication system base station interface (IuNB).
Background technology
Fig. 1 is the schematic diagram of 3GPP network configuration, this network can be divided into the core net (CN) of carrying out professional route and exchange and signaling exchange and mobile management and towards wireless universal land radio access web (UTRAN) two large divisions, in the network configuration between the different entities by interface connection based on variety of protocol.As shown in Figure 2, radio network controller (RNC) and Serving GPRS Support Node/mobile switching centre (SGSN/MSC) link to each other by Iu interface (interface between RNC and the core net), be core net with Access Network between link to each other through the Iu interface, the interface control protocol is called Radio Access Network Application Part (RNAP); Link to each other by the Iur interface between RNC and the RNC, the interface control protocol is called Radio Network Subsystem Application Part (RNSAP); Link to each other by Iub interface between RNC and NodeB or the base station, the interface control protocol is called WCDMA system base-station applying portion (NBAP); Subscriber equipment (UE) is crossed air interface Uu with UTRAN Netcom and is linked to each other.
In whole network system, for the uplink and downlink link, data and signaling are to transmit along the path of core net-SRNC (professional RNC)-CRNC (control RNC)-NodeB-UE basically.NodeB or base station with and only be connected with corresponding C RNC, this connection also is unique path that other entities and core net are carried out signaling and exchanges data in base station and the wireless access network.Therefore when the direct path between CRNC and the NodeB broke down, NodeB will can not work fully.
Summary of the invention
The retransmission method that the purpose of this invention is to provide a kind of data and signaling still can be set up indirect path and can proceed to guarantee data and signaling exchange between RNC and the NodeB when the direct path between above-mentioned RNC and the NodeB breaks down.
According to data in the wireless communication system of the present invention and signaling forwarding method, wireless communication system comprises radio network controller (RNC) and base station (NodeB) that can be connected into Internet Protocol (IP) network, come swap data and signaling by the IuB link between RNC and the base station, connect by the Iur link between the different RNC, connect by the IuNB link between the different base stations, it is characterized in that, when the IuB link between one of them RNC and the target BS broke down, described method comprised following steps:
(1) hunt out one can be through linking to each other with IP network other RNC and path that described one of them RNC and described target BS are linked, other base station;
(2) between described one of them RNC and described target BS, set up a transit link along the path that searches, in this transit link, link to each other by the Iur link between the different RNC, link to each other by the IuB link between RNC and the base station, it is continuous to pass through the IuNB link between the different base stations; And
(3) described one of them RNC and described target BS comprise the user face data of data and signaling by the transit link transmission of setting up in the above-mentioned steps (2).
Therefore, according to method of the present invention, when the IuB link between RNC in the wireless communication system and the base station breaks down, still can guarantee the normal transmission of data and signaling by transit link, thereby the system that guaranteed moves normally.
Description of drawings
By below in conjunction with the detailed description of accompanying drawing to the embodiment of the invention, can further understand target of the present invention, feature and advantage, wherein:
Fig. 1 is the schematic diagram of 3GPP network configuration;
Fig. 2 is the schematic diagram of interface between interior each entity of 3GPP network;
Fig. 3 is the schematic diagram according to a kind of network configuration based on the IP transmission of 3GPP standard R5 definition;
Fig. 4 is the schematic diagram according to user's face and chain of command protocol stack on the IuNB interface of the inventive method;
Fig. 5 is a flow chart of setting up and discharge the IuNB link between the base station;
Fig. 6 is not for there being the HSDPA protocol hierarchy figure under the situation of switching base station;
Fig. 7 is the HSDPA protocol hierarchy figure under the base station situation of transferring according to having of the inventive method; And
Fig. 8 is the flow chart according to data of the present invention and one of them embodiment of signaling forwarding method.
Embodiment
As shown in Figure 3, in network struture system according to 3GPP standard R5 definition, Internet Protocol (IP) is partly expanded into wireless access network (RAN) from core net, particularly, in wireless access network, except transport layer replaces the ATM transmission with IP transmission, the formant RNC in the Access Network and base station (NodeB) etc. can directly link to each other with the edge router of IP network.In this network configuration, NodeB not only directly links to each other to carry out the exchange of data and signaling by the Iub link with a corresponding RNC, but also can insert the IP transmission network by router, thus realize with other RNC and NodeB between communicate by letter.When therefore the Iub link that directly links to each other as NodeB and RNC breaks down, can hunt out other RNC that a warp and IP network link to each other and other base station the Iub link is connected the path that the RNC that breaks down and base station chaining get up, in fact this search is route querying, therefore can be finished by router.Subsequently, can set up transit link along the path that searches and replace out of order Iub link, thereby by this transit link swap data and signaling.In the transit link of being set up, connect by the Iur link between the different RNCs, is connected by the Iub link between RNC and the base station, pass through the connection of IuNB link between the different base station.Data that are forwarded and signaling all are regarded as user face data and handle on transit link of the present invention, and the transmission of user face data specifically can be referring to respective protocol in the 3GPP standard or standard on Iur link and the Iub link, repeat no more herein, describe the method for passing through IuNB link transmission user face data below in conjunction with the accompanying drawing emphasis.
1, the protocol stack of IuNB interface between the base station
The IuNB interface provides transmission data and functions such as control command, management transmission network, transmission channel and IuNB interface resource between the base station.For this reason, reply chain of command transfer of data and user plane data transfer definition corresponding protocol stack, wherein, the former is called IuNB interface control plane protocol stack, and the latter is called IuNB interface user plane protocol stack.
According to one embodiment of the present of invention, as shown in Figure 4, the chain of command protocol stack of IuNB interface comprises 6 layers from the bottom to top, wherein, ground floor is for adopting the L1 layer of layer 1 (L1) agreement, the second layer is for adopting the L2 layer of layer 2 (L2) agreement, the 3rd layer for adopting internet (IP) protocol of I P layer, the 4th layer for adopting the SCTP layer of signaling common transmission protocols (SCTP), layer 5 is the SUA layer of employing signaling user's adapting protocol (SUA), and layer 6 is for adopting the BBAP layer of base station to applying portion agreement (BBAP) between the base station.Above-mentioned chain of command protocol stack layer 5 comprises two sublayers, and wherein, first sublayer is for adopting the M3UA sublayer of M3UA, and second sublayer is for adopting the SCCP sublayer of SCCP agreement (SCCP).The chain of command data are encapsulated as this protocol frame according to this layer protocol during through each layer in the protocol stack,, constitute next layer protocol frame after the control information of additional next layer protocol of last layer protocol frame that is.Particularly, send the chain of command data instance with the source base station that sends the chain of command data to the target BS that receives the chain of command data, source base station is at first selected suitable BBAP signaling according to current operation, and fills parameter wherein.Subsequently, source base station connects to the SCCP of transport layer the BBAP transmitting signaling downwards.On the IuNB interface, each user connects and is assigned with a BBAP and connects, and each BBAP is connected and maps to a SCCP on the transport layer and connect.The SCCP of source base station connects that protocol conversion is the IP packet and sends target BS to by IP network through M3UA/SCTP/IP with data.At the target BS place, the BBAP entity that the IP packet that receives is mapped out the SCCP data and sends target BS according to corresponding mapping relations to by separating.Target BS will be operated accordingly according to the BBAP signaling that receives.
According to one embodiment of the present of invention, as shown in Figure 4, the user face protocol stack of IuNB interface comprises 5 layers from the bottom to top, wherein, ground floor is for adopting the L1 layer of layer 1 (L1) agreement, and the second layer is for adopting the L2 layer of layer 2 (L2) agreement, and the 3rd layer for adopting internet (IP) protocol of I P layer, the 4th layer of UDP layer for the employing udp protocol, and layer 5 is for adopting IuNB FP protocol of I uNB FP layer.User face data is encapsulated as this protocol frame according to this layer protocol during through each layer in the protocol stack,, constitutes next layer protocol frame after the control information of additional next layer protocol of last layer protocol frame that is.
In above-mentioned protocol stack structure, L1 agreement, L2 agreement, IP agreement, Stream Control Transmission Protocol, SUA agreement, BBAP agreement and udp protocol all are that those skilled in that art know, and therefore repeat no more.About IuNB FP agreement, its effect is will upper-layer protocol be encapsulated as the frame that meets the IuNB interface after the additional control information of frame of encapsulation, its concrete mode can referring to but be not limited to description in the Chinese invention patent application of submitting in 28 days June in 2002 of awaiting the reply jointly 02112284.9 that is entitled as " communication means in the wireless communication system between the base station ".Above-mentioned protocol stack structure is not unique, in fact can also there be other to meet the protocol stack structure of IuNB interface specification, be that the number of plies of protocol stack and agreement that every layer is selected for use can also have alternate manner, for the one of ordinary skilled in the art, after having read this specification, be not difficult above-mentioned protocol stack structure is made various changes, so the spirit and scope of the present invention should not limited by concrete protocol stack structure.
2, the foundation of IuNB link and release between the base station
Below by Fig. 5 the method that communicates between the base station is described.Suppose that the base station that sends signaling and data is for 1 base station that receives signaling and data is a dominant base 2 from the base station.User face data communication between the base station comprises 3 key steps: user face data transfer step and IuNB link release steps on IuNB link establishment step, the IuNB link, below describe respectively.
As shown in Figure 5, in IuNB link establishment step, at first, 1 dominant base 2 to the reception user face data from the base station that sends user face data sends the request (InterNodeBConnection Request) of setting up logical links.Then, dominant base 2 generates binding ID and puts into to set up according to the wireless network layer ID of dominant base 2 and transport layer ID and send to from the base station 1 behind the link response (InterNodeBConnection Setup) after receiving above-mentioned request.At last, from base station 1 receive set up link response after the distribute links resource, and send link establishments to dominant base 2 and finish message (InterNodeB ConnectionSetup Complete), so far between two base stations, set up the IuNB link.
In the user face data transfer step, 1 according to above-mentioned IuNB user face protocol stack encapsulation user face data and along the IuNB link transmission from the base station, dominant base 2 user face data that then decapsulation receives according to the IuNB user face protocol stack on the IuNB link.
When user plane data transfer finishes, promptly enter IuNB link release steps.In this step, at first, 1 to dominant base 2 transmission requirement release chain circuit messages (InterNodeB ConnectionRelease) from the base station.Then, dominant base 2 discharges the resource relevant with this link according to the message that receives, and to 1 transmission link discharges the message (InterNodeB Connection Release Complete) that finishes from the base station.At last, after receiving that link discharges the message that finishes, discharge the IuNB link circuit resource of self, finish the release of IuNB link between the base station thus from base station 1.
3, processing module (LINKNB module)
When directly connecting between the base station, need to comprise the processing module (LINKNB module) that a signal that other base station is sent receives and transmits in each base station.Particularly, this module is responsible for the foundation of link between the base station and release and the information that passes on the link in time is forwarded to other modules in this base station.
Fig. 6 shows the HSDPA protocol hierarchy figure when not comprising the IuNB link under the prior art and Fig. 7 shows according to HSDPA protocol hierarchy figure on the transit link of the IuNB of comprising link of the present invention.As seen from the figure, prior art and the difference of method of the present invention on the HSDPA agreement are owing to comprised the IuNB link, so the latter has increased an IuNB interface, therefore correspondingly in the base station increased the user face data that the LINKNB module handles between the base station and sent.Particularly, be that example is described with the downlink transfer of RNC to UE, as shown in Figure 7, the data encapsulation that the wireless network layer of source RNC produces RLC and MAC-d becomes the HS-DSCH FP frame of Iur interface and sends to the transport layer of source RNC downwards.Source RNC transport layer is sent to Target RNC by the UDP/IP host-host protocol with Frame.The Target RNC transport layer will be sent to source base station after the FP protocol encapsulation of Frame with Iub interface from source RNC.The Target RNC wireless network layer also produces the MAC-c/sh data, it is encapsulated as the FP frame of Iub interface and the transport layer by Target RNC sends source base station to.Transmit data by the IuNB interface to target BS if desired, then source base station will convert by the LINKNB interface that the transport layer by the IuNB interface sends target BS to behind the FP frame of IuNB interface from the FP frame of Iub interface to, wherein, the transport layer of IuNB interface adopts the UDP/IP agreement.The LINKNB module of target BS receives in the future that frame is untied and data wherein is encapsulated in the MACHS-DSCH frame of Uu interface again, by coded modulation after air interface sends UE to.If source base station needs directly to send data to UE, then as shown in Figure 6, source base station is encapsulated as the MACHS-DSCH radio frames with the HS-DSCHFP frame after air interface sends.UE receives after the radio frames behind the demodulating and decoding, therefrom takes out MAC-c/sh data, MAC-d data and RLC data successively.For UE to RNC uplink, its process repeats no more with above-mentioned opposite herein.
Below by Fig. 8 a embodiment according to data of the present invention and signaling forwarding method is described.In this embodiment, suppose and pass through Iub link transmission signaling and data between base station NB2 and the RNC that NB1 links to each other by the IuNB link with NB2 and links to each other by the Iub link with RNC.
As shown in Figure 8, when system detects Iub link occurs fault between Nb2 and the RNC, can produce the link failure indication.Subsequently, by route querying, system discovery base station NB1 can link to each other with NB2 with RNC, so RNC sends to NB1 and sets up the link-attached request of Iub with it.NB1 will send the link-attached request of IuNB of setting up to NB2 after the request of connecting that receives RNC.NB2 will send the response that connects to NB1 after receiving the request of connecting that NB1 sends.Then, NB1 is according to the response that connects from NB2 that receives, finishes the foundation of Iub link between the IuNB link and NB1 and RNC between NB1 and the NB2, forms a transit link of transferring RNC and NB2 are linked to each other indirectly through NB1 thus.Thereafter, signaling and data by this transit link transmission was originally transmitted on Iub link between RNC and the NB2 it is worthy of note that signaling and data are all as user plane data transfer on transit link.
When detect between NB2 and the RNC the Iub link-recovery just often, RNC sends the request of removing transit link to NB2.NB2 will send the request that discharges the IuNB link to NB1 after receiving the request of removing transit link.NB1 will discharge this IuNB link after receiving the request that discharges the IuNB link, the while is also removed the Iub link with RNC, finishes the dismounting of transit link thus.Thereafter, the transmission of signaling and data reverts to again on the Iub link between them and carries out between RNC and the NB2.
Claims (11)
1. data and the signaling forwarding method in the wireless communication system, wireless communication system comprises radio network controller (RNC) and base station (NodeB) that can be connected into Internet Protocol (IP) network, come swap data and signaling by the IuB link between RNC and the base station, connect by the Iur link between the different RNC, connect by the IuNB link between the different base stations, it is characterized in that, when the IuB link between one of them RNC and the target BS broke down, described wireless communication system was carried out following steps:
(1) hunt out one can be through linking to each other with IP network other RNC and path that described one of them RNC and described target BS are linked, other base station;
(2) between described one of them RNC and described target BS, set up a transit link along the path that searches, in this transit link, link to each other by the Iur link between the different RNC, link to each other by the IuB link between RNC and the base station, it is continuous to pass through the IuNB link between the different base stations; And
(3) described one of them RNC and described target BS comprise the user face data of data and signaling by the transit link transmission of setting up in the above-mentioned steps (2).
2. data and signaling forwarding method in the wireless communication system as claimed in claim 1, it is characterized in that, in step (1) by router hunt out one can be through linking to each other with IP network other RNC and path that described one of them RNC and described target BS are linked, other base station.
3. data and signaling forwarding method in the wireless communication system as claimed in claim 1 or 2 is characterized in that, set up the IuNB link with following steps between different base stations in the described step (2):
(2a) request of setting up the IuNB link is sent in one of them base station to another base station;
(2b) described another base station is after the request that receives the above-mentioned IuNB of foundation link, generates binding ID and put into according to its wireless network layer ID and transport layer ID to send to described one of them base station after setting up link response; And
(2c) described one of them base station receive above-mentioned set up link response after the distribute links resource, and send link establishment to described another one base station and finish message and can on the IuNB link, transmit user face data with indication.
4. data and signaling forwarding method in the wireless communication system as claimed in claim 1 or 2, it is characterized in that, further comprise following steps: the Iub link-recovery between described one of them RNC and described target BS just often, discharge described transit link and in these Iub link transmitting signaling and data, wherein, finish the release of IuNB link between the different base station in the described transit link with following steps:
(4a) one of them base station receives the base station to another one and sends requirement release IuNB chain circuit message;
(4b) described another one base station is receiving after above-mentioned requirements discharges the message of IuNB link, discharges with relevant link circuit resource and to described one of them base station to send IuNB link release message that finishes; And
(4c) described one of them base station discharges its relevant IuNB link receiving after above-mentioned IuNB link discharges the message that finishes.
5. data and signaling forwarding method in the wireless communication system as claimed in claim 1 between the base station, it is characterized in that, in described step (3), the user face data that transmits on the IuNB link in described transit link is handled through InUB Frame Protocol, User Datagram Protoco (UDP), Internet Protocol, layer 2 protocol and layer 1 protocol encapsulation successively.
6. data and signaling forwarding method in the wireless communication system as claimed in claim 1 between the base station, it is characterized in that, in described step (3), be used for controlling the chain of command data that user face data transmits on the described transit link IuNB link and handle to applying portion agreement, signaling user's adapting protocol, signaling common transmission protocols, Internet Protocol, layer 2 protocol and layer 1 protocol encapsulation between the base station through the base station successively.
7. data and signaling forwarding method in the wireless communication system as claimed in claim 6 between the base station, it is characterized in that described chain of command data comprise successively encapsulation process through M3UA and SCCP agreement through the encapsulation process of signaling user adapting protocol.
8. data and signaling forwarding method in the wireless communication system as claimed in claim 1 between the base station, it is characterized in that, described base station comprises the processing module that a signal that other base station is sent receives and transmits, and is used for being responsible for the foundation of IuNB link between the base station and release and the user face data that sends on the IuNB link is forwarded to other modules in the described base station.
As claim 1,2 and 5-8 in data and signaling forwarding method in any described wireless communication system, it is characterized in that described wireless communication system is followed the network struture system of 3GPP standard R5 definition.
10. data and signaling forwarding method in the wireless communication system as claimed in claim 3 is characterized in that, described wireless communication system is followed the network struture system of 3GPP standard R5 definition.
11. data and signaling forwarding method in the wireless communication system as claimed in claim 4 is characterized in that, described wireless communication system is followed the network struture system of 3GPP standard R5 definition.
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| CN 02112358 CN1213583C (en) | 2002-07-03 | 2002-07-03 | Method for forwarding data and signaling |
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| CN100362823C (en) * | 2004-07-20 | 2008-01-16 | 华为技术有限公司 | Radio link procedure management method in Iub interface |
| CN100452898C (en) * | 2004-03-04 | 2009-01-14 | Ut斯达康通讯有限公司 | Method and system for load share in wireless base station |
| WO2009152782A1 (en) * | 2008-06-20 | 2009-12-23 | 华为技术有限公司 | Method, system and device for data transmission between base station and radio network controller |
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