CN102395110B - Method for supporting MBMS service transmission in LTE system - Google Patents

Abstract

A method for supporting MBMS data transmission in an LTE system comprises the following steps: when an MBMS conversation is established, a BM-SC sends an 'MBMS Conversation Establishment Request' to an ECN (ECN (M)) providing an MBMS service; the ECN providing the MBMS service sends an 'MBMS Conversation Establishment Response' to the BM-SC, and sends an 'MBMS Conversation Establishment Request' to the ECN registered by UE; the ECN registered by UE sends an 'MBMS Conversation Establishment Response' to the ECN providing the MBMS service; the ECN registered by UE sends an 'MBMS Conversation Establishment Request' to an ERAN; the ERAN sends an 'MBMS Conversation Establishment Response' to the ECN registered by UE; and the ERAN establishes an essential wireless resource for transmitting MBMS data. The invention provides a new method for providing wireless source management device with MBMS UE context, simplifies a signaling flow and improves the efficiency.

Description

The method of MBMS service transmission is supported in LTE system

The application is the divisional application that the name submitting to Patent Office of the People's Republic of China on January 24th, 2006 is called No. 200610001694.6 application of " method supporting MBMS service transmission in LTE system ".

Technical field

The present invention relates to the method supporting MBMS service transmission in mobile communication system Long Term Evolution (hereinafter referred to as the LTE) system that third generation Partnership Program (hereinafter referred to as 3GPP) proposes.

Background technology

Fig. 1 describes the system configuration of MBMS, and MBMS network configuration based on GPRS (being called for short GPRS) core net, and adds new network element.Here is the description to Fig. 1 MBMS system configuration.

101 broadcast and multicast service center (being called for short BM-SC) are the Service control centers of MBMS system.102 Gateway GPRS Support Nodes (being called for short GGSN) and 103 Serving GPRS Support Nodes (being called for short SGSN) constitute the transmission network of MBMS, for the transmission of data provides route.104UMTS land radio access web (be called for short UTRAN) aloft on interface for MBMS provides Radio Resource.105 subscriber equipmenies (being called for short UE) are used to the terminal equipment receiving data.106 attaching position registers (being called for short HLR) preserve the data relevant with user, can provide the services such as subscription authentication.107Uu is wave point, and 108Iu represents the interface between Access Network and core net.MBMS Iu resource used is not that user is special, but all users of business share thus.

Existing UE adds the process of MBMS as shown in Figure 2.

201UE initiates the process setting up PDP Context.After PDP Context is successfully established, in UE, SGSN and GGSN, all preserve this PDP Context, the signaling simultaneously establishing PS territory between UE and GGSN connects, and the intermediate equipment that this signaling connects is wireless access network (hereinafter referred to as RAN) and SGSN.

202UE sends Internet group management protocol of the multicast group (hereinafter referred to as IGMP) to GGSN and adds message, and this message connects arrival GGSN by the signaling set up in step 201.This message comprises parameter: Internet protocol (hereinafter referred to as IP) multicast address, and this multicast address can identify a certain multicast service in a certain MBMS multicast service or external data network.

203GGSN and BM-SC carries out Signalling exchange to authorize UE.

204GGSN sends MBMS notification request message to SGSN, and this message comprises parameter: UE identifies, IP multicast address.

After 205SGSN receives the message in step 204, send request MBMS context Activation message to UE, this message comprises parameter: UE identifies, IP multicast address.

After 206UE receives the message in step 205, send to SGSN and activate MBMS context request message, this message comprises the MBMS bearing capacity of IP multicast address, access point name (hereinafter referred to as APN), MBMS_NSAPI (Network layer Service Access Point Identifier) and UE.

207SGSN sends " MBMS push-notification-answer " message to GGSN.MBMS push-notification-answer message comprises: cause value.The reason that cause value indicates due to SGSN or UE successfully activates MBMS context or non-successful.Once receive the time-out activating clock in the response message failed operation of instruction or GGSN.GGSN can return IP multicast access (defining in 3GPP TS29.061).

If 208 need, between UE and SGSN, carry out safety encipher process.

209SGSN sends to GGSN and sets up MBMS context request message, and this message comprises IP multicast address and APN.

After 210GGSN receives the message in step 209, carry out Signalling exchange to authorize MBMS and UE with BM-SC.

If 211 GGSN do not set up the bearer context information of this MBMS, GGSN sends " MBMS registration request " message to BM-SC.This message comprises IP multicast address and APN.

BM-SC sends " MBMS registers response " message to GGSN, comprises MBMS bearer context information in message.BM-SC to add the mark of this GGSN in BM-SC bearer context in descendant node list.

If also not for this MBMS distributes Temporary Mobile Group Identity (hereinafter referred to as TMGI), BM-SC distributes a new TMGI.And pass to GGSN, SGSN by " MBMS registers response " message, and pass to UE further by " activating MBMS context to accept " message (215).

If the state of bearer context is for activating, BM-SC initiates the session start process between GGSN.

212GGSN produces MBMS UE context, and sends " producing MBMS context response " to SGSN.

If 213 SGSN do not set up the bearer context information of this MBMS, SGSN sends " MBMS registration request " message to GGSN.This message comprises IP multicast address and APN.

GGSN sends " MBMS registration response is answered ", and message, to SGSN, comprises MBMS bearer context information in message.GGSN to add the mark of this SGSN in GGSNC bearer context in descendant node list.

If 214 at least for this reason UE establish the RAB in a PS territory, SGSN is supplied to RAN MBMS UE contextual information.

Message that 215SGSN sends " activating MBMS context to accept " is to UE.SGSN do not need by the time 212 complete after just send this message.

Existing MBMS session start process as shown in Figure 3.

301BM-SC sends session start request message to the GGSN in MBMS bearer context middle and lower reaches node listing, be used to indicate transmission to be about to start, and provide the session attribute of MBMS (as time of Temporary Mobile Group Identity (hereinafter referred to as TMGI), quality of service (hereinafter referred to as Qos), MBMS region, session identification, estimation session, broadcast or multicast etc.) and 2G (Generation Mobile Telecommunication System) 3G (3G (Third Generation) Moblie) to indicate.BM-SC arranges the state of MBMS bearer context for activating.For the MBMS bearer service of broadcast, GGSN creates MBMS bearer context.GGSN preservation session attribute and downstream node list, in MBMS bearer context, arrange the status attribute of bearer context for activating.GGSN sends session start response message to BM-SC.

302GGSN sends MBMS session start request message to the SGSN in MBMS bearer context middle and lower reaches node listing.Session attribute (as time of TMGI, Qos, MBMS region, session identification, estimation session, broadcast or multicast etc.) is comprised and 2G 3G indicates in message.For the MBMS bearer service of broadcast, SGSN creates MBMS bearer context.SGSN preserves session attribute and 2G 3G indicates in MBMS bearer context, arranges the status attribute of bearer context for activating.SGSN sends MBMS session start response message to GGSN, and comprise channel end mark (hereinafter referred to as TEID) in message, GGSN sends MBMS data by with the load plane of this passage.For a MBMS bearer service, if SGSN receives multiple MBMS session start request message, SGSN only sets up load plane with a GGSN.

303SGSN sends MBMS session start request message to the BSC (base war controller) and (or) the RNC that are connected to this SGSN, not only SGSN uses 2G 3G instruction to decide MBMS session start request message and only sends to BSCs, RNCs, still sends to BSCs but also send to RNCs.Session attribute is comprised as time of TMGI, Qos, MBMS region, session identification, estimation session, broadcast or multicast etc. in message.For multicast service, SGSN can be included in each Routing Area (hereinafter referred to as RA) and add the number that this MBMS is in grouping mobile management idle pulley (hereinafter referred to as PMM-IDLE) UE.For the MBMS bearer service of broadcast, BSC or RNC creates MBMS bearer context.Preserve session attribute in MBMS context at BSC or RNC of Iu pattern, arranging MBMS context is state of activation, sends MBMS conversational response message to SGSN.The BSC of RNC or Iu pattern comprises TEID in this response message, and TEID is used for the load plane that SGSN sends MBMS data.For a MBMS bearer service, if BSC or RNC receives multiple MBMS session start request message, only set up load plane with a SGSN.

304BSC or RNC is that MBMS transmission data set up necessary Radio Resource to interested UEs.

Existing MBMS UE connection procedure as shown in Figure 4.MBMS UE connection procedure is that the UE that there is the connection of Iu packet domain signaling in order to allow RNC know adds or have left one or several MBMS.Here is the detailed description to this process.

401CN sends MBMS UE connection request message to RNC.Comprise in message UE add also be not connected to UTRAN or UE leave also do not notify UTRAN TMGI list, point-to-point RAB (hereinafter referred to as RAB) mark.402RNC receives MBMS UE connection request message.For representing that the MBMS that adds of UE is not also connected to the TMGI of UTRAN, RNC adds UE in MBMS context, if there is no MBMS context, and RNC creates corresponding MBMS context.If UE is in the community that DRNC controls, perform the UE connection procedure of Iur interface.For representing that the MBMS left of UE does not also remove to be connected to the TMGI of UTRAN, RNC deletes UE from MBMS context.Process all TMGIs, RNC sends MBMS UE connection response message to CN, reports unsuccessful connection or goes to connect and reason.

There is upgradability difference in existing 3GPP system configuration, call set-up time is long, and system configuration complexity waits shortcomings, and therefore 3GPP standardization body is carrying out the standardization effort of LTE.For the demand of LTE, each company is proposed the LTE system structure of hope, and the LTE system structure of wherein a kind of proposition as shown in Figure 5.As the function of original RNC and NodeB synthesized a network entity (referred to herein as ERAN 502), the function of SGSN and GGSN is combined becomes a network entity (referred to herein as ECN 503).Wherein packet data compression protocol (hereinafter referred to as PDCP) is the function of original RNC, can be placed on ECN in LTE, also can be placed on ERAN.Simplifying system by reducing network node like this, reducing the time delay of system.504E-PDN is outside public data network, provides data source.Wherein 101 identical in 501UE and Fig. 1.Some companies proposes ERAN and is divided into two apparatus for network node, a function being similar to original Node B, the function of a similar original RNC, or the function of RNC and Node B has again new segmentation combination.The company also had proposes, according to function, ECN is divided into user plane entity and control plane entity.In LTE, functional entity part relevant with Access Network for correspondence, namely corresponding with original UTRAN funtion part is called EUTRAN (UTRAN of reinforcement).

Based on LTE system structure, how MBMS is transmitted is existing specification open question.In original structure, MBMS data is from BM-SC, to GGSN, to SGSN, to the RNC (referring to Fig. 3 and description thereof) at UE place.Wherein SGSN preserves MBMS UE context and UE context (such as UE state, the RNC at place when UE is in PMM connection mode, the information such as Routing Area (hereinafter referred to as RA) at place when UE is in PMM idle pulley), so SGSN can find the RNC in downstream.If in LTE, for each MBMS, not every ECN provides data route.The ECN so providing ECN and UE of MBMS to register may not be one, and the node providing the ECN of MBMS how to find downstream like this will be a problem.

Summary of the invention

For solving the problem, the invention provides a kind of method supporting MBMS service transmission in LTE, solving MBMS transmission business Problems existing in LTE system.

According to an aspect of of the present present invention, a kind of method supporting MBMS data transmission in LTE system, comprises step:

The ECN of UE registration receives " activating MBMS context request " message come from UE;

Message that ECN sends " creating MBMS UE context request " is to the ECN providing MBMS;

Licensing process between the ECN initiation of MBMS with BM-SC is provided;

The ECN providing the ECN of MBMS to send " create MBMS UE context response " message to register to UE;

The ECN of UE registration sends and activates MBMS context Accept message to UE.

According to another aspect of the present invention, a kind of method supporting MBMS data transmission in LTE system, comprises step:

" UE updating context request information is to the ECN providing MBMS in the ECN transmission of UE registration;

The ECN providing the ECN of MBMS to send " response of UE updating context " message to register to UE.

According to another aspect of the present invention, a kind of method supporting MBMS data transmission in LTE system, comprises step:

" UP sets up request information to ERAN, comprises MBMS UE contextual information in message in the ECN transmission of UE registration;

ERAN sends the ECN that " UP sets up response " message is registered to UE.

According to another aspect of the present invention, a kind of method supporting MBMS data transmission in LTE system, comprises step:

UE sends IGMP to ECN and adds message;

ERAN receives the UE connection request message come from ECN;

If this ERAN does not also register MBMS, ERAN sends " IGMP adds " message to BM-SC;

BM-SC adds this ERAN in the downstream node list of MBMS bearer context.

According to another aspect of the present invention, a kind of method supporting MBMS data transmission in LTE system, comprises step:

UE sends IGMP to ECN and adds message;

ERAN receives the UE connection request message come from ECN;

If this ERAN does not also register MBMS, ERAN sends " MBMS registration request " message to BM-SC;

BM-SC adds this ERAN in the downstream node list of MBMS bearer context;

BM-SC sends " MBMS registers response " message to ERAN.

According to another aspect of the present invention, a kind of method supporting MBMS data transmission in LTE system, comprises step:

When MBMS session start, BM-SC sends " MBMS session start request "

Message is to the ERANs in the list of MBMS bearer context downstream node;

ERAN sends " MBMS session start response " message to BM-SC;

ERAN is that the UE adding MBMS sets up required Radio Resource.

The present invention proposes the method supporting MBMS data transmission in several LTE system, make BM-SC and ECN to find downstream node, make several MBMS data transmission path become possibility.Also proposed in invention new provides MBMS UE context to the method for RRM equipment, simplifies signaling process, improves efficiency.

Accompanying drawing explanation

Fig. 1 is the logical network device figure of MBMS;

Fig. 2 is the process that existing UE adds MBMS;

Fig. 3 is existing MBMS session start process;

Fig. 4 is existing MBMS UE connection procedure;

Fig. 5 is a kind of LTE system structure of proposition;

Fig. 6 is based on LTE system structure, the logical network device figure of MBMS;

Fig. 7 is in MBMS network configuration, and UE adds the basic process of MBMS;

Fig. 8 is in MBMS network configuration, and UE adds the another kind of method of MBMS;

Fig. 9 is a kind of method of MBMS session start;

Figure 10 is the MBMS data transmission path supporting Fig. 9, and UE adds the process (method one) of MBMS;

Figure 11 is the process (method one) that corresponding UE adds MBMS, the motion flow of ECN;

Figure 12 is the MBMS data transmission path supporting Fig. 9, and UE adds the process (method two) of MBMS;

Figure 13 is the signaling process supporting that UE connecting system selects not have RMA network node;

Figure 14 is the UE adding MBMS changes enable mode into process from LTE idle pulley;

Figure 15 is the motion flow for embodiment Figure 14, ECN;

Figure 16 is the motion flow for embodiment Figure 14, ERAN;

Figure 17 is the second method of MBMS session start;

Figure 18 is the MBMS data transmission path supporting Figure 17, and UE adds the process (method one) of MBMS;

Figure 19 is the process (method one) that corresponding diagram 18UE adds MBMS, the motion flow of ECN;

Figure 20 is the MBMS data transmission path supporting Figure 17, and UE adds the process (method two) of MBMS;

Figure 21 is that UE is in LTE idle pulley, the process that the ECN (R) at UE place changes;

Figure 22 is that the UE adding MBMS changes enable mode into from idle pulley, and ECN sends MBMS UE context to the process of ERAN;

Figure 23 is the motion flow of corresponding embodiment 22, ECN;

Figure 24 is the third method of MBMS session start;

Figure 25 is the MBMS data transmission path supporting Figure 24, and UE adds the method for MBMS;

Figure 26 is that UE transmits MBMS bearing capacity to the process of network when entering connection mode.

Embodiment

The embodiment of first-selection of the present invention will be described below by reference to the accompanying drawings.Description below

In, known function or structure will no longer describe in detail.

Fig. 6 is based on LTE core network, increases the MBMS network configuration of new network element BM-SC.Wherein 601 is identical with the description of Fig. 1, is the Service control center of MBMS system.602 is identical with 503 with the network node 502 in Fig. 5 respectively with 603.The function of ECN be initiate the foundation of carrying and release, route MBMS data to suitable downstream node equipment, indicate the function of MBMS to support to UE.The function of ERAN is the business that effective MBMS transmission data walk abreast to the MBMS district specified, MBMS paging, support and MBMS.

In MBMS network configuration, UE adds the basic process of MBMS as shown in Figure 7.Here is the detailed description to this figure.

701 if there is no send IGMP adds the user plane of message, sets up this user plane.The process setting up user plane is not emphasis of the present invention, ignores detailed technology contents here.

702UE sends IGMP to ECN (R) and adds message, and this message is by user planes arrival ECN (R) that are existing or that set up 701.This message comprises parameter: IP multicast address, and this multicast address can identify a certain multicast service in a certain MBMS multicast service or external data network.

703ECN (R) and BM-SC carry out Signalling exchange to authorize UE.By MBMS authorization response message, BM-SC notifies that ECN (R) provides the ECN of MBMS to identify, i.e. ECN (M) mark.Can represent with the address (as IP address) of access point name (hereinafter referred to as APN) or ECN (M).

704ECN (R) sends request MBMS context Activation message to UE, and this message comprises parameter: the information such as IP multicast address, ECN (M) mark.ECN (R) sends request MBMS context activation has two kinds to the method for UE, and one directly sends NAS message request MBMS context message to UE, through ERAN transparent transmission.Another method sends Iu+ message request MBMS context activation to ERAN.ERAN sends air-interface information request MBMS context activation again to UE.

After 705UE receives the message in step 704, create MBMS UE context.UE sends to ECN (R) and activates MBMS context request message, and this message comprises the MBMS bearing capacity of IP multicast address, ECN (M) mark (can represent with the address of APN or ECN (M) (as IP address)), MBMS_NSAPI (Network layer Service Access Point Identifier) and UE.This message can be NAS message.Also can regardless of NAS, AS.UE first sends this message to ERAN.ERAN sends Iu+ message activation MBMS context request again to ECN (R).

706ECN (R) sends to ECN (M) and sets up MBMS UE context request message, and this message comprises IP multicast address, International Mobile Subscriber mark (hereinafter referred to as IMSI) and ECN (M) mark.

After 707ECN (M) receives the message in step 706, carry out Signalling exchange to authorize MBMS and UE with BM-SC.Authorize and determine to send to ECN (M) by MBMS authorization response message.

708BM-SC creates MBMS UE context.

If 709 ECN (M) do not set up the bearer context information of this MBMS, ECN (M) sends " MBMS registration request " message to BM-SC.

710BM-SC sends " MBMS registers response " message to ECN (M), comprises MBMS bearer context information in message.BM-SC to add the mark of this ECN (M) in BM-SC bearer context in descendant node list.

If the state of bearer context is for activating, BM-SC initiates the session start process between ECN (M).

711ECN (M) produces MBMS UE context, and 712 and send " create MBMS UE context response " to ECN (R).

713ECN (R) sends activation MBMS context and accepts to UE.ECN (R) sends activation MBMS context and accepts there are two kinds to the method for UE, and one directly sends NAS message activation MBMS context to accept to UE, through ERAN transparent transmission.Another method sends Iu+ message activation MBMS context to accept to ERAN.The air-interface information that ERAN sends again activates MBMS context and accepts to UE.A kind of method before corresponding, if UE establishes a user plane at least for this reason, ECN (R) is supplied to ERAN MBMS UE contextual information, and this is same as the prior art, ignores detailed technology contents.A kind of method after corresponding, comprises MBMS UE contextual information in the message activation MBMS context of Iu+ interface accepts.After ERAN receives this message, 714 preserve MBMS UE context.ERAN sends and activates MBMS context Accept message to UE, does not comprise MBMS UE contextual information in this message.

In MBMS network configuration, UE adds the another kind of method of MBMS as Fig. 8 institute

Show.Here is the detailed description to this figure.

801 if there is no send IGMP adds the user plane of message, sets up this user plane.The process setting up user plane is not emphasis of the present invention, ignores detailed technology contents here.

802UE sends IGMP to ECN (R) and adds message, and this message is by user planes arrival ECN (R) that are existing or that set up 801.This message comprises parameter: IP multicast address, and this multicast address can identify a certain multicast service in a certain MBMS multicast service or external data network.

803ECN (R) and BM-SC carry out Signalling exchange to authorize UE.By MBMS authorization response message, BM-SC notifies that ECN (R) provides the ECN of MBMS to identify, i.e. ECN (M) mark.Can represent with the address (as IP address) of access point name (hereinafter referred to as APN) or ECN (M).

804ECN (R) sends request MBMS context Activation message to UE, and this message comprises parameter: the information such as IP multicast address, ECN (M) mark.ECN (R) sends request MBMS context activation has two kinds to the method for UE, and one directly sends NAS message request MBMS context message to UE, through ERAN transparent transmission.Another method sends Iu+ message request MBMS context activation to ERAN.ERAN sends air-interface information request MBMS context activation again to UE.

After 805UE receives the message in step 804, create MBMS UE context.UE sends to ECN (M) and activates MBMS context request message, and this message comprises the MBMS bearing capacity of IP multicast address, ECN (M) mark (can represent with the address of APN or ECN (M) (as IP address)), MBMS_NSAPI (Network layer Service Access Point Identifier) and UE.This message can be NAS message.Also can regardless of NAS, AS.First send this message to ERAN.ERAN sends Iu+ message activation MBMS context request again to ECN (M).

After 806ECN (M) receives the message in step 805, carry out Signalling exchange to authorize MBMS and UE with BM-SC.Authorize and determine to send to ECN (M) by MBMS authorization response message.

807BM-SC creates MBMS UE context.

If 808 ECN (M) do not set up the bearer context information of this MBMS, ECN (M) sends " MBMS registration request " message to BM-SC.BM-SC sends " MBMS registers response " message to ECN (M), comprises MBMS bearer context information in message.BM-SC to add the mark of this ECN (M) in BM-SC bearer context in descendant node list.

If the state of bearer context is for activating, BM-SC initiates the session start process between ECN (M).

809ECN (M) produces MBMS UE context.

810ECN (M) sends activation MBMS context and accepts to UE.ECN (M) sends activation

MBMS context accepts there are two kinds to the method for UE, and one directly sends NAS message activation MBMS context to accept to UE, through ERAN transparent transmission.Another method sends Iu+ message activation MBMS context to accept to ERAN.The air-interface information that ERAN sends again activates MBMS context and accepts to UE.A kind of method before corresponding, if UE establishes a user plane at least for this reason, ECN (M) is supplied to ERAN MBMS UE contextual information, and this is same as the prior art, ignores detailed technology contents.A kind of method after corresponding, comprises MBMS UE contextual information in the message activation MBMS context of Iu+ interface accepts.After ERAN receives this message, perform 811, preserve MBMS UE context.ERAN sends and activates MBMS context Accept message to UE, does not comprise MBMS UE contextual information in this message.

In MBMS network configuration, a kind of method of MBMS session start as shown in Figure 9.Here is the detailed description to this figure.

901BM-SC sends session start request message to the ECN (M) in MBMS bearer context middle and lower reaches node listing, be used to indicate transmission to be about to start, and provide the session attribute of MBMS as time of MBMS mark, Qos, MBMS region, session identification, estimation session, broadcast still multicast etc.Above-mentioned in the description of Fig. 7 and Fig. 8, BM-SC has saved the downstream node ECN (M) of registration in MBMS bearer context.BM-SC arranges the state of MBMS bearer context for activating.For the MBMS bearer service of broadcast, ECN (M) creates MBMS bearer context.ECN (M) preserves session attribute and downstream node list in MBMS bearer context, arranges the status attribute of bearer context for activating.ECN (M) sends session start response message to BM-SC.

902ECN (M) sends MBMS session start request message to interested ERANs.ECN (M) will preserve UE contextual information, namely add the ERAN that this MBMS is in LTE enable mode UE place, and add the ERANs that tracing area that this MBMS is in LTE idle pulley UE place comprises.Contextual information such as the positional information of UE how obtaining the UE adding MBMS about ECN (M) will be described in conjunction with Figure 10, Figure 11, Figure 12 and Figure 13.Session attribute is comprised as time of MBMS mark, Qos, MBMS region, session identification, estimation session, broadcast or multicast etc. in MBMS session start request message.For the MBMS bearer service of broadcast, ERAN creates MBMS context.ERAN preserves session attribute in MBMS context, arranges the status attribute of business contexts for activating.It is same as the prior art that ERAN creates the contextual situation of MBMS, and such as ERAN receives ECN and notifies that UE activates the information of MBMS, or ERAN receives the next MBMS session start message etc. of ECN, ignores detailed technical descriptioon here.ERAN sends MBMS session start response message to ECN (M), and user plane mark such as TEID, the ECN (M) comprised in message for this MBMS will send MBMS data with this load plane.For a MBMS bearer service, if ERAN receives multiple MBMS session start request message, ERAN only sets up user plane with an ECN (M).

903ERAN is that MBMS transmission data set up necessary Radio Resource to interested UEs.

Figure 10 is the MBMS data transmission path supporting Fig. 9, and UE adds the process (method one) of MBMS.Only the place different from Fig. 7 is described in detail below.

Compared with the basic process that this process and Fig. 7 UE add MBMS, 1001 to 1005,1007 to 1011 and 1013 to 1014 is identical with 701 to 705,707 to 711 and 713 to 714 respectively, ignores detailed description here.Difference is:

After 1006ECN (R) receives and activates MBMS context request message, ECN (R) sends to ECN (M) and sets up MBMS UE context request message, and this message comprises IP multicast address, International Mobile Subscriber mark (hereinafter referred to as IMSI) and ECN (M) mark.This message also comprises UE contextual information in addition.UE contextual information comprises the ERAN mark at UE place.ECN (M) preserves UE contextual information after receiving and activating MBMS context request message.Then 1007 are performed.

1012ECN (M) sends " creating MBMS UE context response " to ECN (R).Preserve ECN (M) (such as APN or IP address) after ECN (R) receives this message and then perform 1013.

Figure 11 is the method that this UE corresponding adds MBMS, the motion flow of ECN.Wherein 1102 to 1108 is that ECN is as motion flow time ECN (R).1109 to 1114 is that ECN is as motion flow time ECN (M).Below this figure is described in detail.

1101ECN receipt message.If 1102 ECN receive the activation MBMS context request message come from UE (or ERAN), if 1103 ECN (M) are not another one ECN, perform existing process, such as ECN sends MBMS authorization requests to the follow-up process such as BM-SC, ignores detailed technical descriptioon here.Send establishment MBMS UE context request to another one ECN (i.e. ECN (M)) if ECN (M) is another one ECN, 1104ECN, in message, comprise UE context.Now UE is in state of activation.Correspondence is in the UE of state of activation, and UE contextual information comprises the ERAN at UE place, 1105 then ECN wait-for-responses.

If 1106 ECN receive the establishment MBMS UE context response information come from another ECN, 1107ECN preserves the mark of another one ECN (i.e. ECN (M)), and ECN (M) mark can be APN or IP address.1108ECN sends and activates MBMS context Accept message to ERAN.

If 1109 ECN receive the establishment MBMS UE context request message come from another one ECN, 1110ECN sends MBMS authorization request message to BM-SC, and wait-for-response.

If 1111 ECN receive the MBMS authorization response message from BM-SC, according to the Authorization result in authorization response message, if UE is not authorized receive this MBMS, this procedure ends, this does not draw in the drawings.If 1112 UE are authorized to, ECN creates MBMS UE context.If this UE is the UE (ECN (M) does not also create MBMS bearer context) that in this ECN (M), first adds this MBMS, ECN (M) also will perform the process to BM-SC registration, this is same as the prior art, do not draw in the drawings, ignore detailed technology contents here.1113ECN sends and creates MBMS UE context response information to ECN (R).

Figure 12 is the MBMS data transmission path supporting Fig. 9, and UE adds the mistake of MBMS

Journey (method two).Only the place different from Fig. 8 is described in detail below.

Compared with the basic process that this process and Fig. 8 UE add MBMS, 1201 to 1204,1206 to 1208 and 1211 to 1214 is identical with 801 to 804,806 to 808 and 811 to 814 of Fig. 8 respectively, ignores detailed description here.Difference is:

The ECN (i.e. ECN (R)) notice ECN (M) that 1205UE or ERAN registers UE by activating MBMS context request message.Sending to the NAS message of ECN if this message is UE, is then that UE notifies ECN (M).If regardless of NAS, AS in LTE.UE first sends this message to ERAN.ERAN sends Iu+ message activation MBMS context request again to ECN (M).Then that ERAN notifies ECN (M) UE place ECN (R).Then 1206 are performed.

1209ECN (M) creates MBMS UE context, and the ERAN preserving UE place is in MBMS UE context.Then ECN (M) sends UE and activates success indicating to ECN (R), comprises UE mark as IMSI in message.ECN (R) preserves ECN (M) in UE context after receiving the UE activation success indicating of 1209.Perform 1210.

When the positional information change at UE place time, ECN (R) will notify ECN (M).Such as, time the ERAN at UE place changes, or UE is changed to idle condition (positional information of UE to change into the multiple ERANs a certain tracing area (hereinafter referred to as TA) from a certain ERAN) from LTE state of activation, or UE is changed to state of activation from LTE idle pulley, all need notice ECN (M).This process as shown in figure 13, is described in detail to this process below.

1301ECN (R) sends UE updating context request message to ECN (M), comprises UE mark as IMSI, UE contextual information in message.UE contextual information is as UE place ERAN, or the ERAN list that UE place TA and TA comprises.After ENC (M) receives this message, upgrade UE contextual information.1302ECN (M) sends a UE updating context response message ECN (R).

Figure 14 is the UE adding MBMS changes enable mode into process from LTE idle pulley.Here is the detailed description to this process.

1401UE sends initial connection request message to ERAN, comprises UE mark as parameters such as the wireless access capabilities of IMSI, UE in message.After ERAN receives this message, 1402 send business request information to ECN (R), comprise the parameters such as UE mark, type of service in message.

Because the change of UE state, UE changes into ERAN, a 1403ECN (R) in the positional information of ECN from the multiple ERANs a TA and sends UE updating context request message to ECN (M).UE mark is comprised as IMSI, UE context in message.In this case UE contextual information is UE place ERAN.After ECN (M) receives UE updating context request message, upgrade UE contextual information.1404ECN (M) sends UE updating context response message to ECN (R), comprises MBMS UE contextual information in message.MBMS contextual information refers to the MBMS identification list that UE adds.

1405ECN (R) sends user plane (hereinafter referred to as UP) and sets up request message to ERAN, comprises user plane and set up desired parameters as user plane mark, Qos etc. in message, and MBMSUE context.Wherein ECN sends UP foundation request and performs 403,1404 does not have absolute sequencing.

ERAN receives after UP sets up request message, preserves MBMS UE context.1406ERAN sends UP and sets up request message to UE.

1407UE sets up request message resource allocation according to UP, then sends UP and sets up response message to ERAN.1408ERAN sends UP and sets up response message to ECN (R).

Wherein the process 1405 of Iu+ interface is not only suitable for when supporting the MBMS data transmission path of Fig. 9, is also suitable for when other data transfer path, has nothing to do with data transfer path.The UP process of establishing of Iu+ interface can be used for sending MBMS UE contextual information to ERAN.

Between corresponding ECN (R) and ECN (M), UE updating context process and ECN send MBMS UE context to embodiment Figure 14 of the process of ERAN by the user plane request of setting up, and wherein the motion flow of ECN as shown in figure 15.Here is the detailed description to this process.

1501ECN receipt message, 1502ECN receives the business request information come from ERAN, sends renewal UE context request to ECN (M) if 1503 ECN (M) are another one ECN, 1504ECN, and wait-for-response.The situation being same ECN for ECN (M) and ECN (R) ignores detailed description here.In fact as the description to Figure 13, when the positional information change at UE place time, ECN (R) needs to send UE updating context request message to ECN (M), such as, time the ERAN at UE place changes, or UE is changed to idle condition (positional information of UE to change into the multiple ERAN a certain tracing area (hereinafter referred to as TA) from a certain ERAN) from LTE state of activation, or UE is changed to state of activation from LTE idle pulley, all need notice ECN (M).Here be when LTE idle pulley converts enable mode to, describe the action of ECN for UE.

If 1505 ECN receive the UE updating context response message come from another one ECN, 1506ECN sends UP and sets up request message to ERAN, if UE adds MBMS, MBMS UE context (comprising the MBMS identification list that UE adds) is comprised in message, and wait-for-response.Described above, between ECN (R) and ECN (M), UE updating context process occurs under numerous conditions, and ECN not necessarily can perform the step of 1506 after receiving the response of UE updating context in other cases.Situation when being just converted to enable mode for UE from LTE idle pulley here.

If 1507 ECN receive the UP come from ERAN and set up response message, 1508ECN preserves information, as the user plane mark that ERAN distributes.

If 1509 ECN receive the UE updating context request come from another ECN, 1510ECN upgrades UE contextual information, the such as ERAN at UE place.1511ECN sends UE updating context and responds to the ECN sending message, i.e. ECN (R).

Wherein 1502 to 1508 is ECN motion flows as ECN (R).1509 to 1511 is ECN motion flows as ECN (M).

Between corresponding ECN (R) and ECN (M), UE updating context process and ECN send MBMS UE context to embodiment Figure 14 of the process of ERAN by the user plane request of setting up, and wherein the motion flow of ERAN as shown in figure 16.Here is the detailed description to this process.

1601ERAN receipt message, 1602ERAN receives the UP come from ECN and sets up request message, if 1603 UP set up in request message comprise MBMS UE contextual information, 1604ERAN preserves MBMS UE contextual information.Then perform other process, such as ERAN sends UP and sets up request message to UE, and this is not main contents of the present invention, ignores detailed technical descriptioon here.If do not comprise MBMS UE contextual information in message, RAN also performs the irrelevant process of other and MBMS.

In MBMS network configuration, the second method of MBMS session start as shown in figure 17.Here is the detailed description to this figure.

1701BM-SC sends session start request message to the ECN (M) in MBMS bearer context middle and lower reaches node listing, be used to indicate transmission to be about to start, and provide the session attribute of MBMS as time of MBMS mark, Qos, MBMS region, session identification, estimation session, broadcast still multicast etc.Above-mentioned in the description of Fig. 7 and Fig. 8, BM-SC has saved the downstream node ECN (M) of registration in MBMS bearer context.BM-SC arranges the state of MBMS bearer context for activating.For the MBMS bearer service of broadcast, ECN (M) creates MBMS bearer context.ECN (M) preserves session attribute and downstream node list in MBMS bearer context, arranges the status attribute of bearer context for activating.ECN (M) sends session start response message to BM-SC.

1702ECN (M) sends MBMS session start request message to the ECN (R) in MBMS bearer context middle and lower reaches node listing.The ECN (R) how obtaining the UE place adding MBMS about ECN (M) will be described in conjunction with Figure 18, Figure 19, Figure 20 and Figure 21.Session attribute is comprised as time of MBMS mark, Qos, MBMS region, session identification, estimation session, broadcast or multicast etc. in message.For the MBMS bearer service of broadcast, ECN (R) creates MBMS bearer context.ECN (R) preserves session attribute in MBMS bearer context, arranges the status attribute of bearer context for activating.ECN (R) sends MBMS session start response message to ECN (M), and comprising user plane mark such as TEID, ECN (M) in message will send MBMS data to ECN (R) with this load plane.For a MBMS bearer service, if ECN (R) receives multiple MBMS session start request message, ECN (R) only sets up load plane with an ECN (M).

1703ECN (R) sends MBMS session start request message to interested ERAN.ECN (R) can find interested ERAN by two kinds of methods.One method is that ECN (R) preserves MBMS UE context when UE adds MBMS.Illustrate the description referred to Figure 18.UE identifies, UE adds MBMS identification list and ECN (M) list is comprised in MBMS UE context.The ERANs node that the ERAN adding the UE place of MBMS or the UE place TA adding MBMS comprises is interested ERAN.Second method is that ECN (M) sends in the MBMS session start request message of ECN (R) and comprises UE identification list.ECN (R) finds interested ERANs according to adding MBMS UE.Session attribute is comprised as time of MBMS mark, Qos, MBMS region, session identification, estimation session, broadcast or multicast etc. in MBMS session start request message.For the MBMS bearer service of broadcast, ERAN creates MBMS context.ERAN preserves session attribute in MBMS context, arranges the status attribute of business contexts for activating.ERAN sends MBMS session start response message to ECN (R), and user plane mark such as TEID, the ECN (R) comprised in message for this MBMS will send MBMS data to ERAN with this load plane.For a MBMS bearer service, if ERAN receives multiple MBMS session start request message, ERAN only sets up user plane with an ECN (R).

1704ERAN is that MBMS transmission data set up necessary Radio Resource to interested UEs.

Figure 18 is the MBMS data transmission path supporting Figure 17, and UE adds the process (method one) of MBMS.Only the place different from Fig. 7 is described in detail below.

Compared with the basic process that this process and Fig. 7 UE add MBMS, 1801 to 1810 and 1813 to 1814 is identical with 701 to 710 and 713 to 714 of Fig. 7 respectively, ignores detailed description here.Difference is:

1811ECN (M) creates MBMS UE context, comprises the ECN (R) at UE place in contextual information.

1812ECN (M) sends and creates MBMS UE context response information to ECN (R).Corresponding 1703ECN (R) preserves the contextual method of MBMS UE.First MBMS that if this MBMS is UE to add, ECN (R) creates MBMS UE context, preserves UE mark, MBMS mark and ECN (M) mark (can be APN or IP address).If not first MBMS that this UE adds, ECN (R) upgrades MBMS UE context, and preservation MBMS mark and ECN (M) mark point are clipped in MBMS identification list and ECN (M) identification list.Corresponding 1703ECN (M) sends to the method comprising UE identification list in the MBMS session start request message of ECN (R), and ECN (R) only needs to preserve ECN (M) mark.

This UE corresponding adds the method for MBMS, the motion flow of ECN as shown in figure 19, below only describe in detail and the distinguishing step 1904 of Figure 11,1907 and 1912.Other step is identical with Figure 11, ignores detailed description here.

1904ECN sends and creates MBMS UE context request to another one ECN (i.e. ECN (M)).Then 1905ECN wait-for-response is performed.

1907 corresponding 1703ECN (R) preserve the contextual method of MBMS UE.If first MBMS that UE adds, ECN (R) creates MBMS UE context, preserves UE mark, MBMS mark and ECN (M) mark (can be APN or IP address).If not first MBMS that this UE adds, ECN (R) upgrades MBMS UE context, and preservation MBMS mark and ECN (M) mark point are clipped in MBMS identification list and ECN (M) identification list.Corresponding 1703ECN (M) sends to the method comprising UE identification list in the MBMS session start request message of ECN (R), and ECN (R) only needs to preserve ECN (M) mark.

If 1912 UE are authorized to, ECN creates MBMS UE context, comprises the ECN (i.e. ECN (R)) that UE registers in UE context.If this UE is the process that the UE that in this ECN (M), first adds this MBMS, ECN (M) also will perform to BM-SC registration, this is same as the prior art, does not draw in the drawings, ignores detailed technology contents here.

Figure 20 is the MBMS data transmission path supporting Figure 17, and UE adds the process (method two) of MBMS.Only the place different from Fig. 8 is described in detail below.

Compared with the basic process that this process and Fig. 8 UE add MBMS, 2001 to 2004,2006 to 2008 and 2011 to 2014 is identical with 801 to 804,806 to 808 and 811 to 814 of Fig. 8 respectively, ignores detailed description here.Difference is:

The ECN (i.e. ECN (R)) notice ECN (M) that 2005UE or ERAN registers UE by activating MBMS context request message.Sending to the NAS message of ECN if this message is UE, is then that UE notifies ECN (M).If regardless of NAS, AS in LTE.UE first sends this message to ERAN.ERAN sends Iu+ message activation MBMS context request again to ECN (M).Then that ERAN notifies ECN (M) UE place ECN (R).Then 2006 are performed.

2009ECN (M) creates MBMS UE context, and the ECN (R) preserving UE place is in MBMS UE context.Then ECN (M) sends UE and activates success indicating to ECN (R), comprises UE mark as IMSI in message.ECN (R) receives the UE activation success indicating of 2009, and corresponding 1703ECN (R) preserves the contextual method of MBMS UE.If first MBMS that UE adds, ECN (R) creates MBMS UE context, preserves UE mark, MBMS mark and ECN (M) mark (can be APN or IP address).If not first MBMS that this UE adds, ECN (R) upgrades MBMS UE context, and preservation MBMS mark and ECN (M) mark point are clipped in MBMS identification list and ECN (M) identification list.Corresponding 1703ECN (M) sends to the method comprising UE identification list in the MBMS session start request message of ECN (R), and ECN (R) only needs to preserve ECN (M) mark.Perform 2010.

Support the data transfer path of Figure 17, when UE is in LTE idle pulley, and time the ECN at UE place (R) changes, need notice ECN (M).Figure 21 describes this process.

2101UE is in LTE idle pulley, and UE moves to another one tracing area from a tracing area, and UE sends tracking area update request message to new ECN, comprises old tracing area mark and new tracing area mark in message.After ECN receives this message, according to old tracing area mark, find that UE is originally at another one ECN.2102ECN sends ECN updating context request message to old ECN, comprises old tracing area mark and new tracing area mark in message.After 2103 old ECN receive ECN context request message, send ECN context response information to new ECN, by this message, the contextual information of UE is sent to new ECN, such as authentication information, UE ability etc.ECN (M) list that this UE adds MBMS is also comprised in this message.

2104 steps are processes that notice ECN (M) UE institute login EC N (R) changes.Here two kinds of methods notice ECN (M) are had.(1) new ECN (R) sends and upgrades location request message to ECN (M), comprises UE and identify such as IMSI in message.After ECN (M) receives this message, upgrade the ECN (R) at UE place, send and upgrade position response message to new ECN (R), comprise UE mark in message as IMSI.(2) old ECN (R) sends and upgrades location request message to ECN (M), comprises new ECN mark, UE mark as IMSI in message.After ECN (M) receives this message, upgrade the ECN (R) at UE place, send and upgrade position response message to old ECN (R), comprise UE mark in message as IMSI.For second method, upgrading position request process can before ECN context request between new and old ECN and response process.For these two kinds of methods, upgrading position process can not have response message.

If 2105 need, perform the security process between UE and network.

2106 new ECN send and upgrade location message to home subscriber servers (hereinafter referred to as HSS), and request HSS upgrades the positional information of UE.After 2107HSS receives this message, send cancel location message and require that old ECN deletes the relevant information of UE to old ECN.Old ECN deletes the relevant information of UE, sends canceling position acknowledge message to HSS.After HSS receives the canceling position acknowledge message of old ECN, 2108HSS sends and upgrades location confirmation to new ECN.

After new ECN receives and upgrades position acknowledge message, 2109 new ECN send tracking area update and complete message to UE.2110UE lastest imformation, sends tracking area update and completes message to new ECN.

Wherein the message of 2101,2109 and 2110 can be NAS message, through ERAN transparent transmission, also can not distinguish NAS and AS, is two message of air interface and Iu+ interface respectively.

Here be want to stress that UE is in the tracking area update process of idle pulley between different ECN, when shifting UE information between two ECN, old ECN needs to send UE institute by context transfer response message and adds relevant ECN (M) list of MBMS to new ECN (in figure 2103), and how to notify the process (in figure 2104) of ECN (M).It not the TA renewal process itself stressed between different ECN.If the TA renewal process in the future between different ECN changes to some extent, such as, process between ECN and HSS, will not affect main contents of the present invention.

When UE changes enable mode into from LTE idle pulley, ECN sends to ERAN by the user plane process of establishing between ECN and ERAN MBMS UE contextual information, as shown in figure 22.

2201UE sends initial connection request message to ERAN, comprises UE mark as parameters such as the wireless access capabilities of IMSI, UE in message.After ERAN receives this message, 2202 send business request information to ECN (i.e. ECN (R)), comprise the parameters such as UE mark, type of service in message.

2203ECN sends UP and sets up request message to ERAN, comprises user plane and set up desired parameters, as user plane mark, Qos etc., if UE adds MBMS, also comprise MBMS UE context in message in message.MBMS UE context refers to the MBMS identification list that UE adds.

ERAN receives after UP sets up request message, if comprise MBMS UE context in message, ERAN preserves MBMS UE context.2204ERAN sends UP and sets up request message to UE.

2205UE sets up request message resource allocation according to UP, then sends UP and sets up response message to ERAN.2206ERAN sends UP and sets up response message to ECN (R).

Wherein the process of 2203 is not only suitable for when supporting the MBMS data transmission path of Figure 17, is also suitable for when other data transfer path, has nothing to do with data transfer path.Here be converted to enable mode to illustrate that ECN sets up request message by UP and sends MBMSUE contextual information to the process of ERAN for UE from LTE idle pulley.If the process itself that UE is converted to enable mode from LTE idle pulley in the future changes to some extent, the such as change of message number, will not affect main contents of the present invention.

The motion flow of the process that this UE corresponding changes enable mode into from idle pulley wherein ERAN is with Figure 16 and describe identical, no longer describes in detail here.Wherein the motion flow of ECN as shown in figure 23.

2301ECN receipt message, 2302ECN receives the business request information come from ERAN, if 2303 need the business for request to set up user plane, 2304ECN sends UP and sets up request message to ERAN, comprises user plane configuration information in message.If this UE adds one or more MBMS, in message, also comprise MBMS UE context.MBMS UE context refers to the MBMS identification list that UE adds.ECN wait-for-response.Here detailed technology contents is ignored for not needing the situation setting up user plane for the business of request.

If 2305 ECN receive the UP come from ERAN and set up response message, 2306ECN preserves information, as the user plane mark that ERAN distributes.

In MBMS network configuration, the third method of MBMS session start as shown in figure 24.Here is the detailed description to this figure.

2401BM-SC sends session start request message to the ERANs in MBMS bearer context middle and lower reaches node listing, be used to indicate transmission to be about to start, and provide the session attribute of MBMS as time of MBMS mark, Qos, MBMS region, session identification, estimation session, broadcast still multicast etc.How to find the process of downstream node ERANs will be described in conjunction with Figure 25 about BM-SC.BM-SC arranges the state of MBMS bearer context for activating.For the MBMS bearer service of broadcast, ERAN creates MBMS context.ERAN preserves session attribute in MBMS context, arranges the status attribute of business contexts for activating.ERAN sends session start response message to BM-SC.ERAN creates MBMS context in the following cases: ERAN receives the notice that ECN UE adds MBMS; ERAN receives the session start request of BM-SC.If ERAN does not also have MBMS context in these cases, ERAN will create MBMS context.

2404ERAN is that MBMS transmission data set up necessary Radio Resource to interested UEs.

Support the MBMS data transmission path of Figure 24, UE adds the method for MBMS as shown in figure 25.Here is the detailed description to this figure.

2501 if there is no send IGMP adds the user plane of message, sets up this user plane.The process setting up user plane is not emphasis of the present invention, ignores detailed technology contents here.

2502UE sends IGMP to ECN and adds message, and this message is by user planes arrival ECN that is existing or that set up 2501.This message comprises parameter: IP multicast address, and this multicast address can identify a certain multicast service in a certain MBMS multicast service or external data network.

2503ECN and BM-SC carries out Signalling exchange to authorize UE.APN is comprised in MBMS authorization response message.

If 2504 ECN do not preserve the MBMS ability of UE, ECN sends UE MBMS bearing capacity request message to UE, for asking the MBMS bearing capacity of UE.This message can be NAS message, also can not distinguish NAS and AS, and ECN sends the request of Iu+ message UE MBMS bearing capacity to ERAN.ERAN sends the request of air-interface information UE MBMS bearing capacity to UE after receiving this message.UE sends the response of UE MBMS bearing capacity after receiving this message, comprise the MBMS bearing capacity of UE in message.The same with request message, response message can be NAS message, also can not distinguish NAS and AS, is two message of air interface and Iu+ interface respectively.After ECN receives response message, preserve the MBMS bearing capacity of UE.According to the MBMS bearing capacity of UE, if UE ability does not possess, ECN can refuse adding of UE, stops the process that UE adds MBMS.

2505ECN sends UE connection request message to ERAN, comprises MBMS mark, IP multicast address and APN that UE adds in message.

If 2506 UE are UE that in this ERAN, first adds this MBMS, ERAN registers to BM-SC.Here have two kinds of methods, one is that ERAN transmission IGMP adds message to BM-SC.Another kind is that ERAN sends MBMS login request message to BM-SC, comprises IP multicast address and APN in message.BM-SC receives IGMP and adds or after MBMS login request message, preserve in the downstream node list in ERAN to MBMS bearer context.Corresponding ECN sends MBMS login request message to the method for BM-SC, and BM-SC sends MBMS registration reply message to ERAN.

Add in the process of MBMS at this UE, if ECN does not have the MBMS bearing capacity of UE, ECN is by the MBMS bearing capacity of request UE.Another method that ECN obtains UE MBMS bearing capacity is, when UE enters connection mode, UE sends MBMS bearing capacity to network, as passed through initial connection request message, as shown in figure 26.

2601UE sends initial connection request message to ERAN, comprises UE mark as parameters such as the wireless access capabilities of IMSI, UE in message.If UE supports MBMS, in message, also comprise the MBMS bearing capacity of UE.ERAN receives this message, 2602ERAN sends business request information to ECN, UE mark, type of service is comprised in message, if comprise the MBMS bearing capacity of UE in the message initial connection request of air interface, then ERAN sends to the MBMS bearing capacity also comprising UE in the business request information of ECN.ECN preserves the MBMS bearing capacity of UE.

2603ECN sends UP and sets up request message to ERAN, comprises user plane and set up desired parameters as user plane mark, Qos etc. in message.

ERAN receives after UP sets up request message, and 2604ERAN sends UP and sets up request message to UE.

2605UE sets up request message resource allocation according to UP, then sends UP and sets up response message to ERAN.2606ERAN sends UP and sets up response message to ECN.

Use this UE to send the MBMS bearing capacity of UE to the method for network, when UE adds MBMS (shown in Figure 25), ECN will not need the MBMS bearing capacity (step 2504) of asking UE.

When the UE adding certain MBMS moves to another one ERAN, this UE is in new ERAN first when adding the UE of certain MBMS, and ERAN needs, to BM-SC registration, the process of 2506 to occur.

When the UE adding certain MBMS moves to a new TA, this UE is in this TA first when adding the UE of certain MBMS, and all ERANs that ECN comprises in this TA send UE connection request message.If do not have other to add the UE of certain MBMS in the ERANs that this TA comprises, ERANs needs, to BM-SC registration, the process of 2506 to occur.

When the UE adding MBMS moves to idle pulley, ECN will send UE connection request to all ERANs in TA.For also all not needing, to BM-SC registration, the process of 2506 to occur to the ERANs of BM-SC registration, ERANs.

In a word, when ERAN receives the UE connection request message of ECN, if ERAN does not also have certain MBMS in registered UE connection request message, ERAN sends the message of 2506 to BM-SC.

When the UE that in ERANs, last adds certain MBMS leaves or moves away time, ERANs needs to separate registration to BM-SC.Detailed process is: first method, after ERAN transmission igmp leave message receives message to BM-SC, BM-SC, ERAN is deleted from the downstream node of MBMS bearer context.Second method, after ERAN transmission MBMS solution registration message receives message to BM-SC, BM-SC, deletes ERAN from the downstream node of MBMS bearer context.BM-SC sends MBMS and separates registration reply message to ERAN.

Claims (5)

1. support a method for MBMS data transmission in LTE system, comprise step:

When MBMS session start, " MBMS session start request information is to the Evolved Core Network ECN providing MBMS in BM-SC transmission;

The ECN of MBMS is provided to send " MBMS session start response " message to BM-SC;

The ECN of MBMS is provided to send " the ECN that MBMS session start request information is registered to UE;

The ECN of UE registration sends " MBMS session start response " message to the ECN providing MBMS;

" MBMS session start request information is to evolved wireless Access Network ERAN in the ECN transmission of UE registration;

ERAN sends the ECN that " MBMS session start response " message is registered to UE; And

ERAN is that MBMS transmission data set up necessary Radio Resource.

2. method according to claim 1, wherein, what BM-SC, the ECN providing ECN and UE of MBMS to register sent separately " all comprises MBMS mark in MBMS session start request information.

3. method according to claim 1, wherein, what BM-SC, the ECN providing ECN and UE of MBMS to register sent separately " all comprises the Qos information of MBMS in MBMS session start request information.

4. method according to claim 1, wherein, BM-SC, the ECN providing ECN and UE of MBMS to register send separately " all comprise in MBMS session start request information MBMS be broadcast or the information of multicast.

5. method according to claim 1, wherein, all comprises user plane mark in " MBMS session start response " message that ECN and ERAN that UE registers sends separately.