CN101990266B - System and method for transmitting non-access stratum (NAS) information - Google Patents
System and method for transmitting non-access stratum (NAS) information Download PDFInfo
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- CN101990266B CN101990266B CN200910161543.0A CN200910161543A CN101990266B CN 101990266 B CN101990266 B CN 101990266B CN 200910161543 A CN200910161543 A CN 200910161543A CN 101990266 B CN101990266 B CN 101990266B
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Abstract
The invention provides a system and a method for transmitting non-access stratum (NAS) information between wireless access systems. The method comprises the following steps that: a first access network controller sending a message which carries the NAS information to a second access network controller through an Iur-g interface and carrying first NAS information, the first access network controller sending the received first NAS information sent by a core network (CN) to the second access network controller through the Iur-g interface; and the second access network controller sending the received first NAS information to user equipment (UE). By the technical scheme of the invention, the NAS information is transmitted between the wireless access systems, the requirement of flow processing between the CN and the UE is met and user experience is improved.
Description
Technical field
The present invention relates to field of wireless communication, relate in particular to the system and method that transmits Non-Access Stratum information between a kind of wireless access system.
Background technology
2G(second generation mobile communication system) GSM network has developed for many years in China, there is a good national GSM network covering in China Mobile, the construction of current GSM network is quite ripe, there is good spreadability and stability, the voice service of high-quality can be provided, can be still good speech business bearer network future, and this is very valuable resource.On the other hand, along with 3G(3-G (Generation Three mobile communication system)) the continuous maturation of technology, the quickening of commercial process, and in the progressively promotion and application in the whole world, 3G network is with its higher availability of frequency spectrum, and can provide the more business of abundant personality to have been widely recognized.With respect to 2G system, 3G network has greatly improved on to the support of data service, and for mobile Web access, audio stream, video flowing, and the support of IP multimedia call etc. is all more perfect.So 2G and 3G coexistence of systems will be a kind of long-standing situations.
In 3GPP international standard protocol, have a standard interface Iur-g between 2G and 3G wireless access system, this interface is not supported the transmission of user service data information.Under the background of current 2G and 3G coexistence of systems, in particularly being switched to the voice of 2G by 3G, by Iur-g transmission user business datum, improve between handover success rate assurance system load balancing very necessary.
Given this, the method for the business data transmission between a kind of wireless access system has been proposed.As shown in Figure 1, by the wireless access network element RNC(radio network controller of 3G) and the wireless access network element BSC(base station controller of 2G) between interface Iur-g, transmission user business datum, specifically comprise that following content: RNC reports by Iur-g interface notice BSC and switches preparation according to the measurement of terminal, comprising forwarding the port numbers of user face data between BSC and RNC, BSC distributes interface-free resources and determines that port numbers can be ready to complete with returning to switch to RNC afterwards.RNC receives the transparent forwarding of carrying out data after success response message by the port numbers having consulted.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of system and method that transmits Non-Access Stratum information, has realized the transmission of Non-Access Stratum information between wireless access system, has met the flow processing between CN and UE, has improved user's impression.
In order to address the above problem, the invention provides a kind of method of transmitting Non-Access Stratum information, comprise: the first access network controller is sent and to carry described the first Non-Access Stratum information when carrying the message of Non-Access Stratum information to the second access network controller by Iur-g interface, the first Non-Access Stratum information exchange that the first access network controller is sent the core net of reception is crossed Iur-g interface and is sent to the second access network controller, and described the second access network controller is sent to subscriber equipment by the first Non-Access Stratum information receiving.
Further, the second Non-Access Stratum information exchange that the second access network controller is sent the subscriber equipment of reception is crossed Iur-g interface and is sent to the first access network controller, and described the first access network controller is sent to core net by the second Non-Access Stratum information receiving.
Further, described the first access network controller is radio network controller, and the second access network controller is base station controller; Or described the first access network controller is base station controller, the second access network controller is base station controller; Or described the first access network controller is base station controller, the second access network controller is radio network controller;
The second access network controller is sent and to carry described the second Non-Access Stratum information when carrying the message of Non-Access Stratum information to the first access network controller by Iur-g interface.
Further, described the first access network controller is radio network controller, when the second access network controller is base station controller, core net is carried described the first Non-Access Stratum information when radio network controller sends direct message transfer by Iu interface, subscriber equipment carries described the second Non-Access Stratum information when base station controller sends Dm channel link access protocol frame by Um Interface.
Further, described for carrying the message of Non-Access Stratum information except comprising Non-Access Stratum information, also comprise one or more in following information: the COS that the temporary identifier of the service radio network of subscriber equipment, the D-RNTI of subscriber equipment, the field type of core net, the sign of core net and indication Non-Access Stratum information provide.
The present invention also provides a kind of method of transmitting Non-Access Stratum information, comprise: the second Non-Access Stratum information exchange that the second access network controller is sent the subscriber equipment of reception is crossed Iur-g interface and is sent to the first access network controller, described the first access network controller is sent to core net by the second Non-Access Stratum information receiving, and described the second access network controller is sent and carries described the second Non-Access Stratum information when carrying the message of Non-Access Stratum information to the first access network controller by Iur-g interface.
The present invention also provides a kind of system of transmitting Non-Access Stratum information, comprises the first access network controller, the second access network controller, core net and subscriber equipment;
The first access network controller is sent and to carry described the first Non-Access Stratum information when carrying the message of Non-Access Stratum information to the second access network controller by Iur-g interface, described the first access network controller is for receiving the first Non-Access Stratum information that core net is sent, and by and the second access network controller between Iur-g interface to the second access network controller, send described the first Non-Access Stratum information;
Described the second access network controller is for being sent to subscriber equipment by the first Non-Access Stratum information receiving.
Further, the second Non-Access Stratum information that described the second access network controller is also sent for receiving subscriber equipment, and by and the first access network controller between the second Non-Access Stratum information of send receiving to the first access network controller of Iur-g interface;
Described the first access network controller is also sent to core net for the second Non-Access Stratum information that the second access network controller is sent.
Further, described the first access network controller is radio network controller, and the second access network controller is base station controller; Or described the first access network controller is base station controller, the second access network controller is base station controller; Or described the first access network controller is base station controller, the second access network controller is radio network controller;
The second access network controller is sent and to carry described the second Non-Access Stratum information when carrying the message of Non-Access Stratum information to the first access network controller by Iur-g interface.
Further, described the first access network controller is radio network controller, when the second access network controller is base station controller, core net is carried the first Non-Access Stratum information when radio network controller sends direct message transfer by Iu interface, subscriber equipment carries the second Non-Access Stratum information when base station controller sends Dm channel link access protocol frame by Um Interface.
Further, described for carrying the message of Non-Access Stratum information except comprising Non-Access Stratum information, also comprise one or more in following information: the COS that the temporary identifier of the service radio network of subscriber equipment, the D-RNTI of subscriber equipment, the field type of core net, the sign of core net and indication Non-Access Stratum information provide.
The present invention also provides a kind of system of transmitting Non-Access Stratum information, comprises the first access network controller, the second access network controller, core net and subscriber equipment;
Described the second access network controller is sent and to carry described the second Non-Access Stratum information when carrying the message of Non-Access Stratum information to the first access network controller by Iur-g interface, described the second access network controller is for receiving the second Non-Access Stratum information that subscriber equipment is sent, and by and the first access network controller between Iur-g interface to the first access network controller, send the second Non-Access Stratum information receiving;
Described the first access network controller is sent to core net for the second Non-Access Stratum information that the second access network controller is sent.
In sum, by technical scheme of the present invention, realize the transmission of Non-Access Stratum information between wireless access system, can meet the flow processing between CN and UE, improved user's impression.
Accompanying drawing explanation
Fig. 1 is the method flow diagram of the business data transmission between a kind of wireless access system;
Fig. 2 is system configuration schematic diagram of the present invention;
Fig. 3 a and Fig. 3 b are the inventive method flow charts;
Fig. 4 is non-access layer information conveying flow figure in application example one of the present invention;
Fig. 5 is non-access layer information conveying flow figure in application example two of the present invention.
Embodiment
The in the situation that of Iur-g interface transmission user business datum, in order to meet the integrality of Business Processing, need to transmit Non-Access Stratum (NAS) information between subscriber equipment (be called User Equipment:UE under 3G, be called Mobile Station:MS in GSM) and core net (Core Network:CN) by Iur-g interface.
The present embodiment provides a kind of system of Non-Access Stratum information, as shown in Figure 2, comprising: CN, UE(MS), the first access network controller and the second access network controller; RNC, BSC;
The first access network controller is used for receiving the first Non-Access Stratum information that CN sends, and by Iur-g interface, the first Non-Access Stratum information receiving is sent to the second access network controller; Also for the second Non-Access Stratum information that the second access network controller receiving is sent, be sent to CN;
The second access network controller is used for receiving the second Non-Access Stratum information that UE sends, and by Iur-g interface, the second Non-Access Stratum information receiving is sent to the first access network controller; Also for the first Non-Access Stratum information that the first access network controller receiving is sent, be sent to UE;
The first access network controller sends for carrying the message of Non-Access Stratum information to the second access network controller by Iur-g interface, and the NAS-PDU unit in this message carries the first Non-Access Stratum information of reception, the second access network controller sends for carrying the message of Non-Access Stratum information to the first access network controller by Iur-g interface, and the NAS-PDU unit in this message carries the second Non-Access Stratum information of reception, for the message of carrying Non-Access Stratum information, can be, but not limited to is the direct message transfer of enhancement mode (Enhanced Direct Transfer), this message structure is as shown in table 1, this message is except comprising NAS information, can also comprise one or more in following information: Message Type(type of message), Transaction ID, the temporary identifier of S-RNTI(service radio network), the temporary identifier of D-RNTI(drifting radio network), CN Domain Indicator(CN field type), the sign of CN ID(CN) and the COS that provides of SAPI(indication NAS message),
Above-mentioned the first access network controller is RNC, and the second access network controller is BSC; Or first access network controller be BSC, the second access network controller is BSC; Or first access network controller be BSC, the second access network controller is RNC; The first Non-Access Stratum information refers to be sent to by CN the Non-Access Stratum information of UE, and the second Non-Access Stratum information refers to be sent to by UE the Non-Access Stratum information of CN;
When the first access network controller is RNC, when the second access network controller is BSC, CN by and RNC between Iu interface to RNC, send the first Non-Access Stratum information, can carry by the protocol Data Unit " NAS-PDU " of direct message transfer above-mentioned the first Non-Access Stratum information;
When the first access network controller is RNC, when the second access network controller is BSC, UE sends the second Non-Access Stratum information by Um Interface to BSC, and can be, but not limited to is at LAPDm(Link Access Protocol on Dm Channel:Dm channel link access protocol) carry above-mentioned the second Non-Access Stratum information in frame.
Non-Access Stratum information comprises the directly calling of peer protocol layer peer to peer interaction control (call control) between UE and CN, layer-management (session management), supplemental services (supplementary services), the message corresponding to process such as Short Message Service (short message service) and mobile management (mobility management).
Table 1: the message structure of the carrying Non-Access Stratum information of Iur-g interface definition according to the present invention;
| IE/Group?Name | Presence | Explanation |
| Message?Type | M | Type of message |
| Transaction?ID | M | Transaction Identifier |
| NAS-PDU | M | Non-Access Stratum information |
| S-RNTI | O | The S-RNTI of UE |
| D-RNTI | O | The D-RNTI of UE |
| CN?Domain?Indicator | O | CN field type (CS or PS) |
| CN?ID | O | The sign of CN |
| SAPI | O | The COS that indication NAS message provides |
The present embodiment provides a kind of method of Non-Access Stratum information, comprises that CN sends NAS information to UE transmission NAS information and UE to CN:
In the present embodiment, the first access network controller is RNC, and the second access network controller is BSC; Or the first access network controller is BSC, the second access network controller is BSC; Or the first access network controller is BSC, the second access network controller is RNC; For convenience of description, the Non-Access Stratum information that in the present embodiment, CN is sent to UE is designated as the first Non-Access Stratum information, and the Non-Access Stratum information that UE is sent to CN is designated as the second Non-Access Stratum information;
(a) CN sends NAS information to UE:
Step 301a:CN is sent to the first access network controller by a NAS information;
Step 302a: the NAS information exchange that the first access network controller reception CN sends is crossed Iur-g interface and is sent to the second access network controller, can be by carrying a NAS information for carrying the message of Non-Access Stratum information, the structure of the message of this carrying Non-Access Stratum information is as shown in table 1, this message is except comprising NAS information, can also comprise one or more in following information: Message Type, Transaction ID, S-RNTI, D-RNTI, CN Domain Indicator, CN ID and SAPI;
Step 303a: the second access network controller is received the message of carrying Non-Access Stratum information, obtains a NAS information wherein, and sends it to UE.
(b) UE sends NAS information to CN:
By two application examples, further illustrate the present invention below
Fig. 4 and Fig. 5 are the non-access layer information transmission method flow charts between the wireless access system of two application examples of the present invention.In these two application examples, suppose UE(or be referred to as MS) under GSM network, set up eat dishes without rice or wine (Um Interface) with BSC and be connected, CN side is by completing alternately the Business Processing about this UE with RNC, completes that corresponding speech forwards and signaling message is processed between RNC and BSC by Iur-g interface.
Application example one, the NAS information that CN sends to UE, the method comprises:
Step S401:CN by and RNC between Iu interface the one NAS information exchange crossed to direct transmission (DIRECT TRANSFER) message be sent to RNC;
The one NAS information can be carried by the protocol Data Unit " NAS-PDU " of direct message transfer;
Step S402:RNC obtains the NAS information in direct message transfer, is encapsulated in the NAS-PDU information unit of (Enhanced Direct Transfer) in the direct message transfer of enhancement mode, and is sent to BSC by Iur-g interface;
In addition, while comprising SAPI information in direct message transfer, RNC can also obtain SAPI from direct message transfer, and is filled up in the SAPI information unit in the direct message transfer of enhancement mode;
The structure of the direct message transfer of enhancement mode is as shown in table 1, this message at least comprises NAS information, can also comprise one or more in following information: Message Type, Transaction ID, S-RNTI, D-RNTI, CN Domain Indicator, CN ID and SAPI;
Step S403:BSC obtains the NAS information in the direct transmission information of enhancement mode;
Step S404:BSC by and UE between Um Interface the one NAS information is sent to UE;
It is to be assembled in LAPDm frame and to be sent to UE a NAS information as data field that BSC can be, but not limited to.
Application example two, UE sends NAS information to CN, and the method comprises the following steps
Step S501:UE by and BSC between Um Interface the 2nd NAS information is sent to BSC;
It is that the 2nd NAS information is placed in LAPDm frame and is sent to BSC that UE can be, but not limited to;
The 2nd NAS Information encapsulation that step S502:BSC sends UE is in the Non-Access Stratum information of the direct message transfer of enhancement mode (Enhanced Direct Transfer), BSC can also fill in the SAPI field in the direct message transfer of enhancement mode according to COS corresponding to NAS information, then by Iur-g interface, the direct message transfer of enhancement mode is sent to RNC;
Step S503:RNC obtains the 2nd NAS information in the direct message transfer of enhancement mode;
While comprising SAPI in the direct message transfer of enhancement mode that RNC receives, RNC also obtains SAPI from the direct message transfer of enhancement mode;
Step S504:RNC is sent to CN by the 2nd NAS information of obtaining, and when RNC has also obtained SAPI from enhancement mode direct message transfer, RNC is also sent to CN by the SAPI obtaining;
Above-mentioned the 2nd NAS information and SAPI are sent to CN by direct message transfer (DIRECT TRANSFER) from Iu interface; The 2nd NAS information can be that the protocol Data Unit " NAS-PDU " by direct message transfer carries, and SAPI can carry by direct message transfer " SAPI information " data cell.
Iur-g interface bearing UE sends to the NAS information of CN and carrying CN to send to the message of the NAS information of UE can be defined as same message name, and the direct message transfer of enhancement mode that for example this example is mentioned, can certainly be defined as other message name.
The non-access layer information of having realized between wireless access system by technical scheme of the present invention transmits, and the complete UE business realizing in mobile communication system meets user's impression.
Claims (12)
1. a method of transmitting Non-Access Stratum information, comprise: the first access network controller is sent and to carry the first Non-Access Stratum information when carrying the message of Non-Access Stratum information to the second access network controller by Iur-g interface, the first Non-Access Stratum information exchange that the first access network controller is sent the core net of reception is crossed Iur-g interface and is sent to the second access network controller, and described the second access network controller is sent to subscriber equipment by the first Non-Access Stratum information receiving.
2. the method for claim 1, is characterized in that:
The second Non-Access Stratum information exchange that the second access network controller is sent the subscriber equipment of reception is crossed Iur-g interface and is sent to the first access network controller, and described the first access network controller is sent to core net by the second Non-Access Stratum information receiving.
3. method as claimed in claim 2, is characterized in that:
Described the first access network controller is radio network controller, and the second access network controller is base station controller; Or described the first access network controller is base station controller, the second access network controller is base station controller; Or described the first access network controller is base station controller, the second access network controller is radio network controller;
The second access network controller is sent and to carry described the second Non-Access Stratum information when carrying the message of Non-Access Stratum information to the first access network controller by Iur-g interface.
4. the method for claim 1, is characterized in that:
Described the first access network controller is radio network controller, when the second access network controller is base station controller, core net is carried described the first Non-Access Stratum information when radio network controller sends direct message transfer by Iu interface, subscriber equipment carries described the second Non-Access Stratum information when base station controller sends Dm channel link access protocol frame by Um Interface.
5. method as claimed in claim 3, is characterized in that:
Described for carrying the message of Non-Access Stratum information except comprising Non-Access Stratum information, also comprise one or more in following information: the COS that the temporary identifier of the service radio network of subscriber equipment, the temporary identifier of the drifting radio network of subscriber equipment, the sign of the field type of core net, core net and indication Non-Access Stratum information provide.
6. a method of transmitting Non-Access Stratum information, comprise: the second Non-Access Stratum information exchange that the second access network controller is sent the subscriber equipment of reception is crossed Iur-g interface and is sent to the first access network controller, described the first access network controller is sent to core net by the second Non-Access Stratum information receiving, and it is characterized in that: the second access network controller is sent and carries described the second Non-Access Stratum information when carrying the message of Non-Access Stratum information to the first access network controller by Iur-g interface.
7. transmit a system for Non-Access Stratum information, comprise the first access network controller, the second access network controller, core net and subscriber equipment; It is characterized in that:
The first access network controller is sent and to carry described the first Non-Access Stratum information when carrying the message of Non-Access Stratum information to the second access network controller by Iur-g interface, described the first access network controller is for receiving the first Non-Access Stratum information that core net is sent, and by and the second access network controller between Iur-g interface to the second access network controller, send described the first Non-Access Stratum information;
Described the second access network controller is for being sent to subscriber equipment by the first Non-Access Stratum information receiving.
8. system as claimed in claim 7, is characterized in that:
The second Non-Access Stratum information that described the second access network controller is also sent for receiving subscriber equipment, and by and the first access network controller between the second Non-Access Stratum information of send receiving to the first access network controller of Iur-g interface;
Described the first access network controller is also sent to core net for the second Non-Access Stratum information that the second access network controller is sent.
9. system as claimed in claim 8, is characterized in that:
Described the first access network controller is radio network controller, and the second access network controller is base station controller; Or described the first access network controller is base station controller, the second access network controller is base station controller; Or described the first access network controller is base station controller, the second access network controller is radio network controller;
The second access network controller is sent and to carry described the second Non-Access Stratum information when carrying the message of Non-Access Stratum information to the first access network controller by Iur-g interface.
10. system as claimed in claim 7, is characterized in that:
Described the first access network controller is radio network controller, when the second access network controller is base station controller, core net is carried the first Non-Access Stratum information when radio network controller sends direct message transfer by Iu interface, subscriber equipment carries the second Non-Access Stratum information when base station controller sends Dm channel link access protocol frame by Um Interface.
11. systems as claimed in claim 9, is characterized in that:
Described for carrying the message of Non-Access Stratum information except comprising Non-Access Stratum information, also comprise one or more in following information: the COS that the temporary identifier of the service radio network of subscriber equipment, the D-RNTI of subscriber equipment, the field type of core net, the sign of core net and indication Non-Access Stratum information provide.
12. 1 kinds of systems of transmitting Non-Access Stratum information, comprise the first access network controller, the second access network controller, core net and subscriber equipment; It is characterized in that:
Described the second access network controller is sent and to carry described the second Non-Access Stratum information when carrying the message of Non-Access Stratum information to the first access network controller by Iur-g interface, described the second access network controller is for receiving the second Non-Access Stratum information that subscriber equipment is sent, and by and the first access network controller between Iur-g interface to the first access network controller, send the second Non-Access Stratum information receiving;
Described the first access network controller is sent to core net for the second Non-Access Stratum information that the second access network controller is sent.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1705401A (en) * | 2004-06-01 | 2005-12-07 | 华为技术有限公司 | A switching method between systems |
| CN101069441A (en) * | 2004-11-29 | 2007-11-07 | 捷讯研究有限公司 | Network selection involving GANC redirection |
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| CN1705401A (en) * | 2004-06-01 | 2005-12-07 | 华为技术有限公司 | A switching method between systems |
| CN101069441A (en) * | 2004-11-29 | 2007-11-07 | 捷讯研究有限公司 | Network selection involving GANC redirection |
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