CN102404691A

CN102404691A - Wireless bearer selection method

Info

Publication number: CN102404691A
Application number: CN2011103477644A
Authority: CN
Inventors: 郭亮; 单以文
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2008-10-16
Filing date: 2008-10-16
Publication date: 2012-04-04

Abstract

The invention provides a wireless bearer selection method, comprising sending relevant business information to a terminal when a wireless network controller receives a session start request, and feeding back response information to the wireless network controller by the terminal, wherein the response information carries a wireless bearer way identifier; when the terminal is a user who subscribes the business, the wireless network controller distributes a corresponding bearer way to the terminal according to the bearer way identifier in the response information returned by the terminal. The wireless bearer selection method can select the bearer way according to the wireless bearer identifier of the terminal; and the performance is simple and convenient.

Description

A kind of radio bearer system of selection

The application is to be that October 16, application number in 2008 are dividing an application of 200810170258.0 application for a patent for invention " a kind of multimedia broadcast-multicast service implementation method, system and bearer selection method " applying date.

Technical field

The present invention relates to the communications field, in WCDMA (WCDMA) GSM, the radio bearer system of selection of a kind of multimedia broadcast-multicast service (MBMS, Multimedia Broadcast/Multicast Service).

Background technology

Multimedia broadcast-multicast service (Multimedia Broadcast/Multicast Service is abbreviated as MBMS) is by third generation partner program 3GPP (3 ^RdGeneration Partnership Project) definition transmits the technology of the point of data to multiple spot from a data source to a plurality of targets, can realize that Internet resources are shared, improves utilization rate of network resource, especially interface-free resources.MBMS not only can realize the classes of messages multicast and the broadcasting of plain text low rate; And can also realize multicast and the broadcasting that high-speed multimedia is professional; Multiple rich video, audio frequency and multimedia service are provided; This has complied with following mobile data Development Trend undoubtedly, for the development of 3G provides better professional prospect.

In order to realize MBMS; Need be to (the Serving GPRS Support Node of existing SGSN in the WCDMA network; Serving GPRS Support Node), GGSN (Gateway GPRS Support Node; Gateway GPRS Support Node), RNC (Radio Network Controller; Radio network controller) and the node of UE packet domain such as (User Equipment, subscriber equipmenies) increase the MBMS function, need increase broadcast multicast services center BM-SC (Broadcast Multicast Service Center) simultaneously.

The architecture of MBMS operation system is as shown in Figure 1:

Gmb, Gi reference point are the interface between BM-SC and the GGSN in Fig. 1, and wherein, the Gmb interface provides the chain of command function, and the Gi mouth provides user plane functions.BM-SC is the node that increases newly, and it is the inlet of MBMS service supplier, is used for authorizing and initiation MBMS business, preserves some MBMS business parameters datas, and sends the MBMS business to schedule.

MBMS has broadcasting and two kinds of mode of operations of multicast.Broadcast mode be meant multi-medium data from a service source by unidirectional all UE that send in the broadcast service zone, UE need not registration and can receive broadcast data under this pattern, effective save radio resources, but can't guarantee the integrality of UE reception data; Multicast pattern and broadcast mode are very similar; But the UE that can receive multi-case data is only limited to registered UE; When the UE that receives multi-case data in the sub-district is very few; Can select the radio bearer mode of PTP (Point to Point, point-to-point) to send multi-case data, to reduce interference to other Radio Links.

Existing multicast pattern realization needs UE initiation activation of service and GGSN to the BM-SC register flow path, and flow process is as shown in Figure 2:

Step 201, UE send IGMP (Internet Group Management Protocol to GGSN; IGMP) or MLD (Multicast Listener Discovery; Multicast monitoring discovery) joins request; Message is based upon on PDP (Packet Data Protocol, the packet data protocol) context, is used for representing specifically interested in receiving some multimedia multicast services;

Step 202, GGSN to BM-SC send the AAR authentication request in case make the UE that sends the request of activation can receive the data of interested business;

Step 203, BM-SC are included in the authentication response decision in the AAA message and send to GGSN; AAA message and APN (Access Point Name; APN) is used to create MBMS UE CONTEXT (multimedia broadcasting and multicast customer equipment context) together, if AAA message indication user is not through authentication then the flow process termination;

Step 204, GGSN send MBMS Notification Request to SGSN, wherein comprise IP multicast address, APN, NSAPI (Network Service Access Point Identifier, Network Service Access point sign);

Step 205, SGSN send MBMS Notification Response (cause) response to GGSN, and whether cause is used for indicating the MBMS activation of service successful;

Step 206, SGSN create MBMS UE Context and send Create MBMS Context Request (creating the multimedia broadcasting and multicast context request) to GGSN;

It is the UE authentication that step 207, GGSN send AAR message to BM-SC;

Step 208, BM-SC return authenticating result to GGSN, and authenticating result is included in the AAA message;

If step 209 GGSN does not have bearer context to come for this business carrying to be provided; Such as not registration of GGSN; GGSN needs to send register requirement to BM-SC more so; If be not loaded service distribution T MGI, BM-SC will distribute new TMGI for it so, and send GGSN to by AAA message;

Step 210, BM-SC return AAA message and give GGSN, wherein be included as the professional bearer context information that carrying is provided of MBMS and GGSN is deposited in the downstream node in the BM-SC bearer context;

Step 211, GGSN create MBMS UE Context and return Create MBMS Context Response (creating the multimedia broadcasting and multicast context response) to SGSN.

Shown in Figure 3 is MBMS channel Mapping figure.The radio bearer of point-to-point is two-way carrying, comprises logic channel DTCH (Dedicated Traffic Channel), transmission channel DPCH (dedicated channel) and physical channel DPCH (DPCH) or SCCPCH (auxiliary publish control physical channel).Point is unidirectional carrying to the radio bearer of multiple spot, comprises logic channel MTCH (MBMS Traffic Channel), transmission channel FACH (forward access channel) and physical channel SCCPCH (auxiliary publish control physical channel).Logic channel MTCH be dispose for each MBMS service that provides by a sub-district and be used for the user plane data that MBMS serves is sent to a plurality of UE.Logic channel MCCH (MBMS control channel) is that point is to the multiple spot downlink channel and be used to send the control information that is associated with MBMS.

The professional send mode of existing MBMS is UTRAN (UMTS wireless access network) according to subscribing in the sub-district that the professional UE number of a certain MBMS decides is that to adopt PTP or PTM (putting multiple spot) to carry this MBMS professional.Yet it is not quite reasonable deciding which kind of radio bearer mode of employing based on the number of UE.The interference that the interference that the radio bearer mode of for example setting up PTP for respectively 5 UE near center of housing estate is brought should business brings less than the radio bearer mode multicast of in whole network, using PTM possibly.If but these 5 UE are at the edge of sub-district, then possibly use the radio bearer mode of PTM can bring less interference.

Another factor that will consider is the professional service quality of MBMS, and is professional for the MBMS that uses higher bandwidth, and the thresholding that the radio bearer mode is switched is promptly subscribed to this professional UE number and is less than the professional pairing handoff threshold of the MBMS that uses less Radio Resource.When the radio bearer mode of business changes, receive this professional UE and will rebuild at the entity of RLC (Radio Link control) sublayer and MAC (medium access control) sublayer correspondence.

If what UE received is that the backstage is professional; Then when this professional radio bearer mode when PTP switches to PTM; Corresponding entity will be from the AM mode switch to the UM pattern in the RLC sublayer for UE; The entity corresponding at media access control sublayer switches to MAC-m from MAC-d, and logic channel switches to MTCH from DTCH, and transmission channel switches to FACH from DPCH; Vice versa.If what UE received is streaming media service, then when this professional radio bearer mode when PTP switches to PTM, UE switches to MAC-m at the entity of media access control sublayer correspondence from MAC-d, logic channel switches to MTCH from DTCH, transmission channel switches to FACH from DPCH; Vice versa.

Through analysis to Fig. 2, can know that the implementation of existing multimedia broadcast-multicast service relates to a plurality of network elements and flow process more complicated, and the changing method of radio bearer mode inadequately rationally, too loaded down with trivial details.

Summary of the invention

The technical problem that the present invention will solve provides a kind of radio bearer system of selection, and the business realizing process is simple, and radio bearer switches rationally.

The present invention proposes a kind of radio bearer system of selection, comprises:

Radio network controller is received when session begins to ask, and sends service related information to the terminal;

The terminal is to the radio network controller feedback response message, when the terminal is this professional subscribed users, the bearing mode sign in the response message that radio network controller returns according to the terminal be designated as the corresponding bearing mode of terminal distribution.

Further, said method also can have following characteristics, and subscription request is sent to the broadcast multicast services center in the terminal, carries the bearing mode sign in the request; The broadcast multicast services center is returned and is ordered response to the terminal; Order and carry service identification, the possibility factor and bearing mode sign in the response; This service identification, the possibility factor and bearing mode sign are preserved in the terminal, and the broadcast multicast services center sends to radio network controller with this possibility factor.

Further, said method also can have following characteristics, judges through following mode whether the terminal is this professional subscribed users: comprise the possibility factor in the said service related information; Whether said this possibility factor of terminal inspection is consistent with the possibility factor that preserve at the terminal; If consistent, then the terminal is this professional subscribed users, in response message, carries the bearing mode sign; If inconsistent, then the terminal is not this professional subscribed users.

Further, said method also can have following characteristics, judges through following mode whether the terminal is this professional subscribed users; Carry the possibility factor and bearing mode sign in the response message that said terminal is returned; Whether the possibility factor in said this response message of radio network controller inspection is consistent with the possibility factor of radio network controller, if consistent, then the terminal is this professional subscribed users; If inconsistent, then the terminal is not this professional subscribed users.。

Further; Said method also can have following characteristics; When the indication of said bearing mode sign need be carried for the terminal distribution point-to-point wireless; Radio network controller user terminal for this reason distributes the point-to-point radio bearer, need be that the terminal distribution point-to-point wireless carries if bearing mode identifies not indication, and then user terminal distributes P-T-M wireless loading for this reason.

In sum, the invention provides a kind of radio bearer mode, select bearing mode, realize simple and convenient according to the radio bearer sign at terminal.

Description of drawings

Fig. 1 has MBMS operation system structural model now;

Fig. 2 has MBMS activating multicast service flow process now;

Fig. 3 has MBMS channel Mapping figure now;

Realize the BM-SC Module Division figure that MBMS is professional in Fig. 4 embodiment of the invention;

Fig. 5 embodiment of the invention multicast broadcast service implementation method flow chart;

Fig. 6 embodiment of the invention UE active request PTP carries flow chart;

Fig. 7 embodiment of the invention BM-SC sends possibility factor flow chart to the GGSN node;

Fig. 8 embodiment of the invention radio bearer system of selection flow chart.

Embodiment

The present invention provides a kind of MBMS business realization method; The MBMS business is distinguished; Comprise: business is added the type of service sign; Traffic differentiation is business of need ordering and the business that need not order, identifies according to type of service and judge that whether business could receive after the needs user order.To the business that needs the user to order, before sending business datum, send business cipher key MSK (the MBMS Service Key that encrypts with MUK (MBMS User Key, multimedia broadcast-multicast service user key) to ordering this professional user terminal; The multimedia broadcast-multicast service key); Also issue the transmission security key that uses business cipher key to encrypt, and Business Stream is encrypted, the terminal utilizes the business cipher key of user key enabling decryption of encrypted; Obtain business cipher key; Utilize the transmission security key of business cipher key enabling decryption of encrypted, utilize the program stream of transmission security key enabling decryption of encrypted, obtain program stream; To the business that does not need the user to order, do not issue MTK (MBMS Traffic Key, multimedia broadcast-multicast service transmission security key), the Business Stream that issues is not encrypted.In the follow-up explanation, MUK is abbreviated as user key, MSK abbreviates business cipher key as, and MTK abbreviates transmission security key as.

Seeing also Fig. 4, is embodiment of the invention BM-SC network element nodal function Module Division figure:

Service announcement module 401 is used for to user terminal business guide information being provided, and comprises medium and conversation description in the business guide information, such as the type of coding of video and audio frequency, and multimedia service sign, address and delivery time or the like.

Business cipher key module 402 is used for generating and the management service key, under the triggering of message control module; Use user key secure service key; Send the secure service key to the user, and can be to other module synchronous service keys, for example with stream secrete key administration module synchronous service key.

Message control module 403; GMB is provided interface function; Can send session to next network element node GGSN begins and the conversation end signaling; And can trigger the business cipher key that the business cipher key module issues encryption, trigger service announcement module issuing service guide information and trigger transmission security key and the secure service stream that the stream secrete key administration module issues encryption;

Service order management module 404 is used for the subscription request of process user and the order relations of leading subscriber.

Stream secrete key administration module 405; With generating and manage transmission security key; Under the triggering of message control module; MTK obtains encrypted transmission key EncryptedMTK with business cipher key MSK encrypted transmission key, uses transmission security key secure service stream, issues Encrypted MTK, secure service flows to user terminal.

User terminal uses and the mutual user key deciphering Encrypted MSK that generates of BM-SC generates MSK, obtains MTK with MSK deciphering Encrypt MTK again, obtains Business Stream with MTK enabling decryption of encrypted Business Stream.

Content supplier 406 is used to provide multimedia broadcast-multicast service, and the program that broadcasting and TV issue or the flow media advertisement TV of oneself making or the like are provided.Wherein, content supplier also can be independent of the multimedia broadcasting and multicast center, is a standalone module.

Seeing also Fig. 5, is embodiment of the invention multimedia multicast broadcasting service implementation method flow chart:

When administrator configurations is professional business is classified; Be divided into and need the business that the user orders and need not order (such as the flow media advertisement) business that just can play-over; Distinguish through business being added the type of service sign, set type of service and be designated SubscribeFlag.Perhaps set up a database, preservation business and type of service thereof using Query Database should business the time, are known type of service.

Step 501, message control module are before the transmission program; The type of service sign SubscribeFlag of the business that inquiry be about to be sent makes judgement according to the type of service sign, confirms that business needs business that the user orders or the business that need not order; SubscribeFlag is 1 and is indicated as the business that needs order; SubscribeFlag is 0 and is the business that need not order, also can use other numerals or symbolic representation type of service, such as being that 0 expression is to need the business ordered; Be 1 to be expressed as the business that need not order, the present invention does not limit this.If the business that needs the user to order is changeed step 502, otherwise, step 503 changeed;

If step 502 type of service is designated the business that needs the user to order, be 1 o'clock such as SubscribeFlag, message control module sends session through the Gmb interface to GGSN and begins request, and informing network is that transfer of data is set up carrying; Message control module informing business key module is handed down to user terminal after using user key to encrypt professional corresponding service key; Also the notification streams key management module generates transmission security key MTK, uses MSK to encrypt MTK, uses MTK secure service stream; The Business Stream that issues MTK after the encryption, encryption is given and has been ordered this professional user terminal; Thereby guarantee to have only the subscriber can receive the Business Stream of encryption, play the program that is about to issue, change step 504;

Need not order the business that just can play if step 503 type of service is designated, be 0 o'clock like SubscribeFlag, and the stream secrete key control module is not encrypted Business Stream, user terminal do not issued MTK simultaneously, reduced network resource consumption, changes step 505;

Step 504, the terminal receives the MSK that encrypts, and the MTK of encryption and secure service stream use user key to decipher the MSK of the encryption that receives, and obtain MSK, use the MTK of MSK enabling decryption of encrypted, obtain MTK, use MTK enabling decryption of encrypted Business Stream, and play service stream finishes.

Step 505, terminal receive and play service stream, finish.

Wherein, before step 501, also comprise step; The service announcement module is sent business guide information to the terminal, and the terminal is selected professional according to this business guide information, send subscription request to the service order management module; Order business, this subscription request of service order management module responds.

The present invention also provides the method for the simple and effective selection radio bearer mode of ability in a kind of MBMS business realizing mode process; Comprise: the number that is not directed against the UE of order business in the sub-district is selected the radio bearer mode; User terminal can initiatively be with the bearing mode sign in subscription request; When RNC sent the MBMS service related information to UE, UE carried the bearing mode sign in the return messages of RNC, and PTM carries RNC for UE selects PTP to carry still according to the decision of bearing mode sign.

, be that embodiment of the invention UE active request PTP carries flow chart please with reference to Fig. 6:

The business guide that step 601, UE issue according to the service announcement module 401 of BM-SC selects to want the business ordered; Send subscription request to BM-SC; Carried bearing mode sign PTPFLAG in the request; Indicate which kind of bearing mode UE selects, whether such as selecting PTP to carry, whether needing network is that it distributes DCCH DCCH;

Step 602, BM-SC return to UE and order success response message, comprise service identification, PTPFLAG and the possibility factor in the message;

The possibility factor is professional relevant parameter, is used for confirming whether this business is the business that order at the terminal.Comprise possibility factor 1 234 such as professional 1, certainly with the sex factor that expresses possibility of complicated parameter more.Behind the user terminal order business; Network side returns this professional possibility factor and gives this user terminal; The possibility factor of the business of carrying 1 when message control module transmission session begins to ask; When terminal and RNC are mutual the possibility factor is conducted a survey, if through would be order business, pass through then to be order business not.

After step 603, UE receive response message, preserve service identification, PTPFLAG and the possibility factor in the response message.

The effect of above-mentioned flow process is to confirm whether the terminal can have the ability of selecting PTPFLAG to certain concrete business; Only after the subscription request success; Network side returns response, and PTPFLAG just can be preserved in the terminal, thereby in the RNC return messages, could be with PTPFALG at follow-up UE.

UE preserves the possibility factor and is used for the possibility factor of sending at RNC in the MBMS access relevant information is made a decision, and the possibility factor of RNC is sended over through core net by BM-SC, specifically please with reference to Fig. 7:

Step 701, BM-SC send Session Start Request (session begins request) message and give GGSN, and this request message is included in the RAR message, in this message, adds new AVP packet, comprises the possibility factor in the new AVP packet;

Step 702, GGSN return the RAA response message to BM-SC after receiving that the session of BM-SC transmission begins request message.

Step 703, GGSN SGSN to downstream node send Session Start Request (session begins request) message, have comprised the possibility factor in the message;

Step 704, SGSN continue the Session of RNC transmission to downstream node Start Request message, guarantee in network carrying resource allocation, the possibility factor to be sent to RNC.

, be the flow chart of radio bearer system of selection in a kind of MBMS business realizing of embodiment of the invention process please with reference to Fig. 8.

Step 801, after RNC receives that session that SGSN sends begins request message (Session Start Request), on MCCH, send service related information and give UE, service related information comprises access information, service identification and the possibility factor;

Step 802, UE receive service related information and confirm to be specially which business according to service identification, again the possibility factor are done the possibility inspection, if through the possibility inspection, then execution in step 803, otherwise, execution in step 804;

Said inspection is meant that the possibility factor that this locality is preserved and the possibility factor that receives compare, if the two unanimity, then through the possibility inspection, if the two is inconsistent, then not through the possibility inspection.

Step 803, represent then that through possibility inspection user terminal is subscribed users; UE returns response message and is with service identification and the bearing mode sign to RNC; The bearing mode sign indicates whether that user terminal distributes the point-to-point radio bearer for this reason, if desired, changes step 806; Otherwise, change step 805;

Step 804, do not represent then that through possibility inspection user terminal is subscribed users not, UE returns response and tape identification shows this business of not ordering to RNC, and RNC does not distribute radio bearer for user terminal, end.

If step 805 UE in the response message that RNC returns not sign need for this reason user terminal distribute point-to-point radio bearer or sign needs for this reason the user distribute P-T-M wireless loading; Then select P-T-M wireless loading; Send the information that is provided with of carrying with MCCH to user terminal; Transmit broadcast data with SCCPCH, finish.

If the identified in response messages that step 806 UE returns to RNC need distribute the point-to-point radio bearer for the user; Then user terminal distributes the point-to-point radio bearer for this reason; Send carrying with DCCH to user terminal information is set, transmit broadcast data, finish with DPCH.

In another embodiment of the present invention, in the step 801, can not carry the possibility factor in the service related information that RNC sends, the terminal is returned and is carried service identification, bearing mode sign and the possibility factor when response message is given RNC.RNC checks the possibility factor in this response message; If through the inspection of the possibility factor; Further the sign of the bearing mode in this response message is judged that again if the indication of bearing mode sign need distribute the point-to-point radio bearer for user terminal, then user terminal distributes the point-to-point radio bearer for this reason; If bearing mode sign not indication need be distributed the point-to-point radio bearer for user terminal, then user terminal distributes P-T-M wireless loading for this reason.

The system of selection of above-mentioned radio bearer mode can be applied in the multimedia broadcast-multicast service implementation method of the present invention; In step 502; Message control module sends session through the Gmb interface to GGSN and begins request; Informing network is that transfer of data is set up when carrying, and uses this radio bearer system of selection to set up as the terminal and carries.

The method of the selection radio bearer mode that the present invention proposes, UE initiatively selects the bearing mode sign when order business, indicate that UE needs RNC is that which kind of radio bearer mode it distributes.The MBMS business information that UE sends RNC is done the possibility inspection; If inspection through prove that UE is subscribed users; Reply the bearing mode sign to RNC further; If showing needs PTP to carry then carries for UE distributes point-to-point, send carrying with DCCH to portable terminal information is set, use the DPCH service data transmission; If showing does not need the PTP carrying then for the UE distributing point carries to multiple spot, send carrying with MCCH to portable terminal information is set, use the SCCPCH service data transmission.

In sum; The technical scheme of the embodiment of the invention has obviously been simplified the implementation of multimedia broadcast multi-broadcasting business; In the present technique scheme directly through business is distinguished; To needs order the business could play when business is about to begin or beginning preceding by BM-SC to this professional UE issuing service key of order, the Business Stream that need not order is not encrypted, thereby has been reduced the resource consumption that Web broadcast MTK brings.

The above implementation can have multiple variation in the Business Processing field, and is all within spirit of the present invention and principle, any modification of being made, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. a radio bearer system of selection is characterized in that, comprises:

2. the method for claim 1 is characterized in that, said method also comprises, and subscription request is sent to the broadcast multicast services center in the terminal, carries the bearing mode sign in the request; The broadcast multicast services center is returned and is ordered response to the terminal; Order and carry service identification, the possibility factor and bearing mode sign in the response; This service identification, the possibility factor and bearing mode sign are preserved in the terminal, and the broadcast multicast services center sends to radio network controller with this possibility factor.

3. method as claimed in claim 2 is characterized in that, judges through following mode whether the terminal is this professional subscribed users: comprise the possibility factor in the said service related information; Whether said this possibility factor of terminal inspection is consistent with the possibility factor that preserve at the terminal; If consistent, then the terminal is this professional subscribed users, in response message, carries the bearing mode sign; If inconsistent, then the terminal is not this professional subscribed users.

4. method as claimed in claim 2 is characterized in that, judges through following mode whether the terminal is this professional subscribed users; Carry the possibility factor and bearing mode sign in the response message that said terminal is returned; Whether the possibility factor in said this response message of radio network controller inspection is consistent with the possibility factor of radio network controller, if consistent, then the terminal is this professional subscribed users; If inconsistent, then the terminal is not this professional subscribed users.

5. like the arbitrary described method of claim 1～4; It is characterized in that; When the indication of said bearing mode sign need be carried for the terminal distribution point-to-point wireless; Radio network controller user terminal for this reason distributes the point-to-point radio bearer, need be that the terminal distribution point-to-point wireless carries if bearing mode identifies not indication, and then user terminal distributes P-T-M wireless loading for this reason.