CN101242573A - Method and system for activating multimedia broadcasting and multicast service - Google Patents
Method and system for activating multimedia broadcasting and multicast service Download PDFInfo
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Abstract
The present invention provides a method of activating MBMS, for realizing MBMS of appointed evolution base station. The method includes following steps: determining the object evolution base station; judging whether the object evolution base station transmitting MBMS or not; when the object evolution base station being not transmit MBMS, transmitting the first information for adding object evolution base station in the content distribution tree and transmitting radio resource distribution information to the object evolution base station by the MCE. The invention also provides an user equipment, an evolution base station, a MCE and a communication system.
Description
Technical field
The present invention relates to the communications field, particularly the method and system of activating multimedia broadcast and multicast service.
Background technology
Along with the development of radio network technique, (Universal MobileTelecommunication System UMTS) develops into Long Term Evolution (Long Term Evolution, LTE) system from universal mobile telecommunications system.LTE is the evolution standard based on the UMTS network that 3GPP organizes to set up.LTE has improved the transmittability of physical layer greatly, reduces the complexity of system.
Wherein, (Multimedia Broadcast/Multicast Service MBMS) also is greatly improved for multimedia broadcasting and multicast services technology.MBMS is introduced in the R6 of UMTS version first, utilizes the network of UMTS that MBMS is provided service.MBMS is meant, by sharing a transmission link multimedia data broadcast or be multicasted to portable terminal.MBMS is divided into broadcasting and two kinds of mode of operations of multicast.Wherein, broadcast mode is meant, with multi-medium data from a service source by unidirectional send to all inner subscriber equipmenies of broadcast service zone (User Equipment, UE).UE under this pattern need not registration can receive broadcast data, and this broadcast mode is save radio resources effectively, but can't guarantee the integrality of the data that UE receives.Multicast pattern and broadcast mode are very similar, but the UE that can receive multi-case data in the multicast pattern is only limited to registered UE that should business.When the UE that receives multi-case data in the sub-district is very few, can select further that point-to-point (Point To Point, radio bearer mode PTP) sends multi-case data, to reduce the interference to other Radio Link.
Under existing UMTS system, by core net (Core Network, CN) continuity of control UE MBMS business or when switching in the sub-district gravity treatment.To switch to routine brief description activates the MBMS business in the Target cell under the UMTS system method.See also method flow diagram shown in Figure 1.
Step 101: switch, (Source Radio Access Network SRNC) carries out switch decision and send the handoff request message (Relocation Required) have the MBMS business information to CN to the source radio resource controller.
(Target Radio Access Network TRNC) sends the handoff request message that has Temporary Mobile Group Identity and point-to-point wireless access bearer sign (PTP Radio Access BearerID) to step 102:CN to the Target Wireless resouce controller.
Step 103:TRNC creates MBMS customer equipment context (MBMS UE Context) and creates corresponding M BMS service context (MBMS Service Context) according to the sign of MBMS business, and obtain corresponding multicast ip address and APN from CN, simultaneously UE and MBMS service context are associated.This moment, the state of MBMS service context was armed state (Standby).
Step 104:TRNC sends MBMS login request message (MBMS RegistrationRequest) to CN.
After step 105:CN receives the MBMS login request message, rebulid from broadcast multicast service center (broadcast multicast service center, BM-SC) to the MBMS distribution tree of TRNC, just on each node of distribution tree, set up MBMS transmission context (MBMS Bearer Context), and upgrade the downstream node tabulation (list of downstreamnodes) of each node.The MBMS transmission context state of newly creating on each node this moment also is an armed state.
Step 106:BM-SC initiates MBMS conversation procedure (MBMS Session Start), sets up connection of MBMS Iu signaling and MBMS Iu carrying between CN and TRNC, and set up point-to-point wireless carrying (PTP RB) between TRNC and UE.MBMS transmission context state on each node is state of activation (Active) at this moment, and UE begins to receive the MBMS data from TRNC.
As seen, the MBMS of activation TRNC needs the participation of CN when professional, and CN need trigger the registration process of TRNC by MBMS subscriber equipment link process.MBMSIu carrying between CN and the TRNC and the MBMS radio bearer between TRNC and the UE also need be initiated MBMS Session Start process again by upstream node and just can be set up after TRNC Register.Present communication system is referring to shown in Figure 2.
When radio network technique develops into the LTE system, MBMS also be varied to enhanced multimedia broadcast and multicast services (Enhanced-MBMS, E-MBMS).Very big variation has taken place in the framework of E-MBMS on the basis of MBMS, one of them is to have introduced single frequency network (Single frequency network, SFN) notion, it requires some continuous evolution base stations (Evolved Node B, eNB),, send identical content with identical carrier wave in the identical time, can make UE receive the signal of enhancing like this, improve reception.These continuous zones that eNB constituted are called as single-frequency network area (SFN area).In the LTE system, under many cell transmission pattern, clearly do not activate the method for MBMS business.
Summary of the invention
The embodiment of the invention provides the method and system of activating multimedia broadcast and multicast service, is used to realize activate the MBMS business of the evolution base station of appointment.
The method of a kind of activating multimedia broadcast and multicast service may further comprise the steps:
Determine target evolution base station;
Judge that whether described target evolution base station is just in the MBMS transmission business;
, send first message that is used for target evolution base station is added the content distribution tree, and send information of radio resource allocation to described target evolution base station when MBMS transmission is professional at described target evolution base station by multicast coordination entity MCE.
A kind of subscriber equipment comprises:
Measuring unit is used for neighbor cell is measured, and the adjacent evolution base station of coincidence measurement condition is defined as target evolution base station;
Receiving element is used for from belonging to the MBMS business information that evolution base station receives described target evolution base station;
Judging unit is used for judging that according to described MBMS business information whether described target evolution base station is just in the MBMS transmission business;
Transmitting element is used for sending second message that is used to activate the MBMS business in judged result for not the time, and this second message comprises the sign of described target evolution base station and is used for the sign of mark MBMS business.
A kind of evolution base station comprises:
Decision unit is used to carry out switch decision, and the evolution base station that will meet judgment condition is defined as target evolution base station;
Receiving element is used for receiving from described target evolution base station or MCE the MBMS business information of described target evolution base station;
Judging unit is used for judging that according to described MBMS business information whether described target evolution base station is just in the MBMS transmission business;
Transmitting element, be used for not sending the handoff request message that comprises the sign that is used for mark MBMS business to described target evolution base station for the time in judged result, perhaps send second message that is used to activate the MBMS business, perhaps further send first message that is used for target evolution base station is added the content distribution tree to MCE; Wherein, described second message comprises the sign of described target evolution base station and is used for the sign of mark MBMS business.
A kind of multicast coordination entity comprises:
Receiving element is used to receive the measurement result that user equipment (UE) sends;
Memory cell, the single-frequency network area location status information and the information of radio resource allocation that are used to store evolution base station;
Judging unit, be used for according to measurement result, coincidence measurement condition and the evolution base station adjacent with the evolution base station of described UE ownership are defined as target evolution base station, and judge according to the single-frequency network area state information of target evolution base station correspondence whether it is in single-frequency network area inside, judge that promptly whether it is just in the MBMS transmission business;
Transmitting element is used for not sending information of radio resource allocation to target evolution base station in judged result for the time, perhaps further sends first message that is used for target evolution base station is added the content distribution tree.
A kind of communication system comprises:
Subscriber equipment is used to receive the MBMS business datum, carries out sub-district gravity treatment or switching; When carrying out the sub-district gravity treatment, neighbor cell is measured and the evolution base station of coincidence measurement condition is defined as target evolution base station, and the MBMS business information of the target evolution base station that obtains according to the evolution base station from ownership judges that whether target evolution base station is just in the MBMS transmission business, and send second message that is used to activate the MBMS business when MBMS transmission is not professional, this second message comprises the sign of described target evolution base station and is used for the sign of mark MBMS business;
Evolution base station is used for transmitting described second message to described user device transmissions MBMS business datum and to multicast coordination entity MCE;
Described MCE is used for sending information of radio resource allocation according to described second message of receiving to described target evolution base station, and sends first message that is used for target evolution base station is added the content distribution tree.
A kind of communication system comprises:
Subscriber equipment is used to receive the MBMS business datum, and switches;
Evolution base station is used for to described user device transmissions MBMS business datum; In handoff procedure, carry out switch decision, and the evolution base station that will meet switching condition is defined as target evolution base station, and judge whether that according to the MBMS business information of the target evolution base station that obtains from target evolution base station or MCE it is just in the MBMS transmission business, and send second message that is used to activate the MBMS business to multicast coordination entity MCE when MBMS transmission is not professional, this second message comprises the sign of described target evolution base station and is used for the sign of mark MBMS business; Perhaps, when MBMS transmission is not professional, send the handoff request message that comprises the sign that is used for mark MBMS business, after receiving described handoff request message by described target evolution base station, send second message that is used to activate the MBMS business to MCE, this second message comprises the sign that is used for mark MBMS business;
Described MCE is used for sending information of radio resource allocation according to second message of receiving to described target evolution base station;
Wherein, described target evolution base station sends first message that is used for target evolution base station is added the content distribution tree after receiving information of radio resource allocation.
A kind of communication system comprises:
Subscriber equipment is used to receive the MBMS business datum, and transmission is measured resulting measurement result to neighbor cell;
Evolution base station is used for to described user device transmissions MBMS business datum, and sends described measurement result to multicast coordination entity MCE;
Described MCE, be used for measurement result according to the subscriber equipment transmission, the evolution base station of coincidence measurement condition is defined as target evolution base station, and judge whether that according to the MBMS business information of the target evolution base station of this locality storage it is just in the MBMS transmission business, and when MBMS transmission is not professional, send information of radio resource allocation, and send first message that is used for target evolution base station is added the content distribution tree to target evolution base station.
Present embodiment has realized that UE had guaranteed with regard to the process of initiating activation MBMS business that UE was in the continuity of carrying out sub-district gravity treatment or switching back MBMS business before finishing sub-district gravity treatment and switching.
Description of drawings
Fig. 1 is the method flow diagram that activates the MBMS business in the prior art;
Fig. 2 is the structure chart of communication system in the prior art;
Fig. 3 is the structure chart of communication system in the embodiment of the invention;
Fig. 4 is the structural representation of communication system in the LTE system in the embodiment of the invention;
Fig. 5 is the structural representation of communication system during the same entity of MCE and eNB in the LTE system in the embodiment of the invention;
Fig. 6 is the structure chart of UE in the embodiment of the invention;
Fig. 7 A is the structure chart of eNB in the embodiment of the invention;
Fig. 7 B is the structure chart of MCE in the embodiment of the invention;
Fig. 8 is the main method flow chart that activates the MBMS business in the embodiment of the invention;
Fig. 9 is the third concrete grammar flow chart that activates the MBMS business in the embodiment of the invention;
Figure 10 is the 4th kind of concrete grammar flow chart that activates the MBMS business in the embodiment of the invention;
Figure 11 is the 5th kind of concrete grammar flow chart that activates the MBMS business in the embodiment of the invention;
Figure 12 is the 6th kind of concrete grammar flow chart that activates the MBMS business in the embodiment of the invention;
Figure 13 is the 7th kind of concrete grammar flow chart that activates the MBMS business in the embodiment of the invention;
Figure 14 is the 8th kind of concrete grammar flow chart that activates the MBMS business in the embodiment of the invention;
Figure 15 is the 9th kind of concrete grammar flow chart that activates the MBMS business in the embodiment of the invention.
Embodiment
For evolution base station (the Evolution Node B that realizes activating appointment, eNB) MBMS business, in the present embodiment, at first by subscriber equipment (User Equipment, UE), eNB or multicast coordination entity (Multi-cell/multicast Coordination Entity, MCE) specify eNB based on the measurement result that obtains after measuring, and when finding that according to the MBMS business information of the eNB of appointment its un-activation MBMS is professional, requesting activation MBMS business.ENB with appointment in the present embodiment is called target eNB, and the eNB of UE ownership is called source eNB.Present embodiment is that example describes with the LTE system.
Present embodiment provides multiple activation to specify the method for the MBMS business of eNB, as first method be, the UE that is in holding state carries out cell measurement and finds the target eNB of coincidence measurement condition when MBMS transmission is professional, activates the method for the MBMS business of target eNB.As second method be, the UE that is in holding state carries out the sub-district gravity treatment and finds target eNB when MBMS transmission is professional, activates the method for the MBMS business of target eNB.Be that when the UE that is in state of activation switched, when source eNB found target eNB MBMS transmission is professional, source eNB activated the method for the MBMS business of target eNB as the third method.As the 4th kind of method be, when the UE that is in state of activation switches, when source eNB finds target eNB MBMS transmission is professional, the method for target eNB requesting activation MBMS business.
Referring to Fig. 3, in the present embodiment communication system comprise the MBMS user plane entity (UPE forMBMS, mUPE), MCE, eNB and UE.
MUPE is a logic entity, for example can be in UPE.MUPE is used for the logic entity of data stream management, the head compression of MBMS, and the distribution of MBMS content-data adds the content distribution tree with target eNB, the data surface carrying between foundation and the target eNB, and be the terminal point of synchronous protocol.
MCE is a logic module, it can be an independently node, referring to shown in Figure 4, also can be in existing network entity, existing network entity such as mobile management entity (Mobile ManagementEntiey, MME), user entity (User Plane Entiey, UPE), broadcast multicast service center (broadcast multicast service center, BM-SC), (the Operation ﹠amp of operation maintenance center; Maintenance Center OMC) or eNB etc., is combined into the network structure of an entity referring to MCE shown in Figure 5 and eNB.In the present embodiment, be that an isolated node is that example describes with MCE.MCE is used to control and distribute the Radio Resource of SFN area, send the information of radio resource allocation (comprising subcarrier information and band information) of SFN area to target eNB, perhaps further send the configuration information (comprising coding, modulation system) etc. of eating dishes without rice or wine, it is added SFN area, activate the MBMS business of target eNB.MCE has sign and corresponding SFN area information and the adjacent eNB sign etc. of service identifiers, SFN area sign, information of radio resource allocation, eat dishes without rice or wine configuration information and eNB.
UE receives the MBMS business datum, carries out the sub-district gravity treatment when being in holding state, switches when being in state of activation.When carrying out the sub-district gravity treatment, UE carries out the sub-district gravity treatment and measures, and selecting the pairing eNB of best cell according to measurement result is target eNB; By the information about the MBMS business (comprising service identifiers etc.) of source eNB102 acquisition target eNB, whether judge target eNB just in the MBMS transmission business, if then the sub-district under this target eNB is arrived in gravity treatment, otherwise the MBMS business of requesting activation target eNB.
ENB transmits the message that UE sends to the UE transferring MBMS service data; Undertaken alternately by X2 interface and adjacent eNB, obtain the information about the MBMS business of adjacent eNB, and judge that according to this information whether adjacent eNB is just in the MBMS transmission business; Carry out switch decision, the eNB that will meet switching condition when target eNB has activated the MBMS business, switches under this target eNB UE as target eNB, otherwise directly or indirectly ask MCE to activate the MBMS business of target eNB, UE is switched under this target eNB then; During for target eNB, send extended request message according to service identifiers to MCE, request adds SFN area, activates the MBMS business.
Referring to Fig. 6, UE comprises receiving element 601, measuring unit 602, judging unit 603, memory cell 604 and transmitting element 605 in the present embodiment.
Wherein, 602 pairs of neighbor cells of measuring unit are measured, and the eNB of coincidence measurement condition is defined as target eNB.Receiving element 601 is from the MBMS business information of source eNB receiving target eNB.The MBMS business information of the target eNB that memory cell 604 storages are received and the measurement result that measuring unit 602 obtains etc.Each memory cell in the present embodiment can be floppy disk, hard disk and tape etc.Judging unit 603 judges that according to described MBMS business information whether target eNB is just in the MBMS transmission business.Transmitting element 605 sends measurement results, perhaps sends extended request message (SFN AreaExpand Request) in judged result for not the time, and this extended request message comprises the sign and the service identifiers of target eNB.
Referring to Fig. 7 A, eNB comprises receiving element 701, decision unit 702, judging unit 703, memory cell 704 and transmitting element 705 in the present embodiment.
Wherein, decision unit 702 carries out switch decision, and the eNB that will meet judgment condition is defined as target evolution base station.Receiving element 701 is from the MBMS business information of target eNB or MCE receiving target eNB.The MBMS business information of the target eNB that memory cell 704 storages are received.Judging unit 703 judges that according to described MBMS business information whether target eNB is just in the MBMS transmission business.Transmitting element 705 does not send the handoff request message that comprises service identifiers and SFN area sign to target eNB in judged result for the time, perhaps send extended request message to MCE, perhaps further send the message that joins request to mUPE, wherein this extended request message comprises the sign and the service identifiers of target eNB.
Referring to Fig. 7 B, MCE comprises receiving element 710, judging unit 711, memory cell 712 and transmitting element 713 in the present embodiment.
Receiving element 710 receives the measurement result of UE transmission and the extended request message of source eNB or target eNB transmission etc.
The SFN area location status information of memory cell 712 storage eNB, service identifiers, SFN area sign, eat dishes without rice or wine configuration information and information of radio resource allocation etc.
Judging unit 711 is according to measurement result, the evolution base station of coincidence measurement condition is defined as target evolution base station, and judges according to the single-frequency network area state information of target evolution base station correspondence whether it is in single-frequency network area inside.
Transmitting element 713 does not send information of radio resource allocation to target evolution base station in judged result for the time, and it is disposed accordingly, perhaps further sends the message that joins request to mUPE.
Referring to Fig. 8, the main method flow process that activates the MBMS business in the present embodiment is as follows:
Step 801: determine target eNB.The UE that is in holding state determines target eNB according to measurement result.When switching, determine target eNB according to the result of switch decision by source eNB.MCE receives that the measurement result that the UE that is in holding state sends determines target eNB.
Step 802: the MBMS business information that obtains target eNB.
Step 803: judge that according to the MBMS business information of target eNB whether target eNB is just in the MBMS transmission business, and when MBMS transmission is not professional, send the message that joins request to mUPE, request adds content distribution tree (or claiming multicast group) with target eNB, sends information of radio resource allocation by MCE to target eNB.
Referring to Fig. 9, the UE that is in holding state in the present embodiment carries out cell measurement and finds the target eNB of coincidence measurement condition when MBMS transmission is professional, and the concrete grammar flow process of MBMS business that activates target eNB is as follows:
Step 901:UE is receiving the MBMS business, and neighbor cell is measured, and measurement result is sent to MCE by source eNB.
Step 902:MCE according to measurement result with the eNB of coincidence measurement condition as target eNB, wherein this eNB is the adjacent eNB of the attributive eNB of UE.
For example, measuring condition is the CPICH transmitting power of the CPICH transmitting power of neighbor cell greater than this sub-district, perhaps be the CPICH transmitting power of neighbor cell greater than the CPICH transmitting power of this sub-district and its difference greater than default threshold value, the CPICH transmitting power that perhaps be neighbor cell is greater than the threshold value of presetting.
Can adjust threshold value in the present embodiment, judge whether to exist the eNB that meets adjusted measuring condition, the eNB of coincidence measurement condition as target eNB, and is activated the MBMS business of target eNB.Before making UE that the sub-district gravity treatment take place, activate the MBMS business of the target eNB of UE possibility gravity treatment.
Step 903:MCE knows according to the SFN area location status information of the eNB of this locality storage whether target eNB is in SFN area inside, knows promptly whether target eNB has activated the MBMS business, if, then only send response message to UE, otherwise, step 904 continued.
Step 904:MCE sends the expansion Indication message to target eNB, this message comprises information of radio resource allocation, and ask mUPE that it is added the content distribution tree, activate the MBMS business of target eNB, and make the one or more sub-districts in the target eNB coverage add SFN area.
Step 905: target eNB disposes accordingly according to information of radio resource allocation, and returns expansion indication response message to MCE.
In step 902, MCE can judge further whether the eNB of coincidence measurement condition meets judgment condition, and the eNB that will meet judgment condition is as target eNB.Judgment condition comprises: whether the sub-district of its covering exceeds maximum SFN area, whether its load is less than default threshold value, whether belong to the eNB that allows to add SFN area in the local configuration information, whether do not belong to the eNB that forbids adding SFN area in the local configuration information.
In step 904, MCE can only send the expansion Indication message to target eNB, sends join request message to mUPE by target eNB in step 905, and request adds the content distribution tree.
This method activates the MBMS business of adjacent eNB when having realized dtr signal that UE receives, make the UE receive the signal of enhancing, improves the quality of reception of MBMS business.
Referring to Figure 10, the UE that is in holding state in the present embodiment carries out the sub-district gravity treatment and finds target eNB when MBMS transmission is professional, and the concrete grammar flow process of MBMS business that activates target eNB is as follows:
Step 1001: the UE that is in holding state carries out the sub-district gravity treatment, judges whether there is the eNB that meets sub-district gravity treatment measuring condition in the adjacent eNB, selects the best eNB of measurement result as target eNB from the eNB that meets sub-district gravity treatment measuring condition.For example, the transmission power level of the common pilot signal of neighbor cell is compared, the sub-district that value is the highest is a best cell.
Whether step 1002:UE judges target eNB just in the MBMS transmission business according to this MBMS business information, if then continue step 1009, otherwise continue step 1003 from the MBMS business information that source eNB obtains target eNB.
Step 1003:UE sends extended request message to source eNB, and this message comprises sign, SFN area sign and the service identifiers of target eNB.
Step 1004: source eNB is transmitted to MCE with extended request message.
Step 1005:MCE sends the expansion Indication message according to the sign and the service identifiers of target eNB to target eNB, this message comprises information of radio resource allocation, and request mUPE adds the content distribution tree with it, activate the MBMS business of target eNB, and make one or more sub-districts of target eNB correspondence add SFNarea.
Step 1006: target eNB disposes accordingly according to information of radio resource allocation, and returns expansion indication response message to MCE.
Step 1007:MCE sends extended response message to source eNB.
Step 1008: source eNB transmits extended response message to UE.
Step 1009:UE gravity treatment is to the sub-district of target eNB.
In step 1005, MCE can indicate source eNB request mUPE that target eNB is added the content distribution tree, sends the message that joins request to mUPE after perhaps receiving the expansion Indication message by target eNB in step 1006, and request adds the content distribution tree.
Referring to Figure 11, when the UE that is in state of activation switched, when source eNB found target eNB MBMS transmission is professional, the concrete grammar flow process of MBMS business that activates target eNB was as follows in the present embodiment:
Step 1101: the UE that is in state of activation switches.
Step 1102: source eNB carries out switch decision, selects to meet the adjacent eNB of switching condition as target eNB.
Step 1103: source eNB obtains the MBMS business information of target eNB by X2 interface, perhaps obtain the MBMS business information of target eNB from MCE, and judge according to this information whether target eNB is transmitting the MBMS business of UE needs, if target eNB has activated the MBMS business, then continue step 1109, otherwise continue step 1104.
Step 1104: source eNB sends extended request message to MCE, and this message comprises sign, service identifiers and the SFN area sign of target eNB.
Step 1105:MCE sends the expansion Indication message to target eNB, and this message comprises information of radio resource allocation, and asks mUPE that it is added the content distribution tree, makes target eNB add SFN area, promptly activates the MBMS business of target eNB.
Step 1106: target eNB disposes accordingly according to information of radio resource allocation, and returns expansion indication response message to MCE.
Step 1107:MCE sends extended response message to source eNB.
Step 1108: source eNB sends handoff request message to target eNB, and continues switching flow.
Step 1109:UE switches to the sub-district of target eNB.
In step 1105, MCE can be further sends the expansion Indication message to the adjacent of target eNB and the eNB that is in SFN area outside, and it is added SFN area.
Wherein, step 1104 and step 1108 can be carried out simultaneously.
Referring to Figure 12, when the UE that is in state of activation switched, when source eNB found target eNB MBMS transmission is professional, the concrete grammar flow process of target eNB requesting activation MBMS business was as follows in the present embodiment:
Step 1201: the UE that is in state of activation switches.
Step 1202: source eNB carries out switch decision, selects to meet the adjacent eNB of switching condition as target eNB.
Step 1203: source eNB obtains the MBMS business information of target eNB by X2 interface, and judge according to this information whether target eNB is transmitting the MBMS business of UE needs, if target eNB has activated the MBMS business, then continue step 1211, otherwise continue step 1204.
Step 1204: source eNB sends handoff request message to target eNB, and this message comprises the sign and the SFN area sign of the MBMS business of UE needs.
Step 1205: target eNB sends extended request message to MCE, and request adds SFN area, and this extended request message comprises service identifiers and SFN area sign.
Step 1206:MCE sends the expansion Indication message to target eNB, and this message comprises information of radio resource allocation.
Step 1207: target eNB disposes accordingly according to information of radio resource allocation, and returns expansion indication response message to MCE.
Step 1208: target eNB sends the message that joins request to mUPE, and request adds the content distribution tree.Perhaps, by sending the message that joins request to mUPE, request adds the content distribution tree with target eNB.Target eNB has added SFN area, has promptly activated the MBMS business.
Step 1209: target eNB sends switching response message to source eNB.
Step 1210: source eNB sends switching command to UE.
Step 1211:UE switches to the sub-district of target eNB.
Referring to Figure 13, the target eNB that UE carries out cell measurement and finds the coincidence measurement condition in the present embodiment is when MBMS transmission is professional, and not limiting UE in the present embodiment is state of activation or holding state.The concrete grammar flow process of the MBMS business of activation target eNB is as follows:
Step 1301:UE is receiving the MBMS business, and neighbor cell is measured, and measurement result is sent to source eNB.
Step 1302: source eNB sends to MCE with measurement result; Perhaps source eNB judges whether tentatively that according to the measurement result of UE needs carry out the MBMS expansion, and preliminary judged result is sent to MCE; Perhaps source eNB together sends to MCE with the measurement result self the done measurement result together with UE.
As target eNB, wherein this eNB is the adjacent eNB of the attributive eNB of UE to step 1303:MCE with the eNB of coincidence measurement condition.Wherein MCE can be according to the measurement result of this UE, and perhaps according to the preliminary judged result of source eNB, perhaps the measurement result of self being done according to source eNB is together with the measurement result of UE, with the eNB of coincidence measurement condition as target eNB.
For example, measuring condition is the CPICH transmitting power of the CPICH transmitting power of neighbor cell greater than this sub-district, perhaps be the CPICH transmitting power of neighbor cell greater than the CPICH transmitting power of this sub-district and its difference greater than default threshold value, the CPICH transmitting power that perhaps be neighbor cell is greater than the threshold value of presetting.
Can adjust threshold value in the present embodiment, judge whether to exist the eNB that meets adjusted measuring condition, the eNB of coincidence measurement condition as target eNB, and is activated the MBMS business of target eNB.Before making UE that the sub-district gravity treatment take place, activate the MBMS business of the target eNB of UE possibility gravity treatment.
Step 1304:MCE knows according to the SFN area location status information of the eNB of this locality storage whether target eNB is in SFN area inside, know promptly whether target eNB has activated the MBMS business, if then only send response message to UE, otherwise, continue step 1305.
Step 1305:MCE sends the expansion Indication message to target eNB, this message comprises information of radio resource allocation, and ask mUPE that it is added the content distribution tree, activate the MBMS business of target eNB, and make the one or more sub-districts in the target eNB coverage add SFN area.
Step 1306: target eNB disposes accordingly according to information of radio resource allocation, and returns expansion indication response message to MCE.
In step 1303, MCE can judge further whether the eNB of coincidence measurement condition meets judgment condition, and the eNB that will meet judgment condition is as target eNB.Judgment condition comprises: whether the sub-district of its covering exceeds maximum SFN area, whether its load is less than default threshold value, whether belong to the eNB that allows to add SFN area in the local configuration information, whether do not belong to the eNB that forbids adding SFN area in the local configuration information.
In step 1305, MCE can only send the expansion Indication message to target eNB, sends join request message to mUPE by target eNB in step 1306, and request adds the content distribution tree.
This method activates the MBMS business of adjacent eNB when having realized dtr signal that UE receives, make the UE receive the signal of enhancing, improves the quality of reception of MBMS business.
Referring to Figure 14, the UE that is in holding state in the present embodiment carries out the sub-district gravity treatment and determines target eNB, but UE can not determine this target eNB when MBMS transmission is professional, and the concrete grammar flow process of MBMS business that activates target eNB is as follows:
Step 1401: the UE that is in holding state carries out the sub-district gravity treatment, judges whether there is the eNB that meets sub-district gravity treatment measuring condition in the adjacent eNB, selects the best eNB of measurement result as target eNB from the eNB that meets sub-district gravity treatment measuring condition.For example, the transmission power level of the common pilot signal of neighbor cell is compared, the sub-district that value is the highest is a best cell.
Step 1402:UE sends Indication message to source eNB, this Indication message comprises the relevant information of MBMS that UE is receiving, one or more such as but not limited to service identifiers, single-frequency network area sign, interim multicast identifier TMGI, session identification Session ID, Target Cell Identifier, target evolution base station sign, this Indication message can also comprise the selected Target Cell Identifier of UE reselection algorithm.
Step 1403: source eNB is transmitted to MCE after receiving this Indication message.
Whether step 1404:MCE judges target eNB just in the MBMS transmission business according to the relevant information of MBMS that UE in this Indication message is receiving, if then continue step 1409, otherwise continue step 1405.
Step 1405:MCE sends the expansion Indication message according to the sign and the service identifiers of target eNB to target eNB, this message comprises information of radio resource allocation, and request mUPE adds the content distribution tree with it, activate the MBMS business of target eNB, and make one or more sub-districts of target eNB correspondence add SFNarea.
Step 1406: target eNB disposes accordingly according to information of radio resource allocation, and returns expansion indication response message to MCE.
Step 1407:MCE sends extended response message to source eNB.
Step 1408: source eNB transmits extended response message to UE.
Step 1409:UE gravity treatment is to the sub-district of target eNB.
In the present embodiment, UE is in cell reselection process and do not know whether Target cell has the MBMS business, it just sends relevant MBMS indication information toward network side in the gravity treatment of sub-district, MCE determines the MBMS business whether needs are expanded Target cell according to indication information.
Referring to Figure 15, switch gravity treatment and determine target eNB as the UE that is in state of activation in the present embodiment, but UE can not determine this target eNB when whether MBMS transmission is professional that the concrete grammar flow process of MBMS business that activates target eNB is as follows:
Step 1501: the UE that is in state of activation switches.
Step 1502: UE in handoff procedure, measure according to the measurement control messages of source eNB or MCE transmission, measurement result is reported source eNB.This measurement result includes but not limited to: the information that the MBMS that this UE is receiving is relevant, one or more such as but not limited to service identifiers, single-frequency network area sign, interim multicast identifier TMGI, session identification Session ID, Target Cell Identifier, target evolution base station sign, this Indication message can also comprise the selected Target Cell Identifier of UE reselection algorithm.
Step 1503: the measurement result that source eNB reports according to UE or carry out switch decision in conjunction with other information such as loads, select to meet the sub-district of switching condition as Target cell.
Step 1504: source eNB sends the MBMS Indication message to MCE, and this Indication message comprises relevant information and the Target Cell Identifier of MBMS that UE is receiving.
Whether step 1505:MCE judges target eNB just in the MBMS transmission business according to the relevant information of MBMS that UE in this Indication message is receiving, if then continue step 1509, otherwise continue step 1506.
Step 1506:MCE sends the expansion Indication message to target eNB, and this message comprises information of radio resource allocation.
Step 1507: target eNB disposes accordingly according to information of radio resource allocation, and returns expansion indication response message to MCE.
Step 1508: target eNB sends the message that joins request to mUPE, and request adds the content distribution tree.Perhaps, by sending the message that joins request to mUPE, request adds the content distribution tree with target eNB.Target eNB has added SFN area, has promptly activated the MBMS business.
Step 1509: target eNB sends switching response message to source eNB.
Step 1510: source eNB sends switching command to UE.
Step 1511:UE switches to the sub-district of target eNB.
These two steps of step 1509 and step 1510 might not can be carried out with the step of single frequency network expansion simultaneously by the order in the present embodiment.
Source eNB sends handoff request message to target eNB in the present embodiment, can also can in this enforcement, not limit the opportunity that this handoff request sends after step 1509 in step 1504 before the MBMS Indication message.
In the present embodiment, UE is moved, and UE measures according to measuring control messages in moving process, and in certain critical point measurement result is reported source eNB, in measurement report, comprises the relevant information of MBMS that this UE is receiving.Source eNB carries out switch decision and select target sub-district according to the measurement result of UE and other load information etc., before initiating handoff request toward the target eNB at Target cell place, source eNB sends the MBMS Indication message toward MCE, comprises relevant information and the Target Cell Identifier of MBMS that UE is receiving in this Indication message.MCE judges whether Target cell has the transmission of these MBMS business, if do not have, then initiates the message of expansion MBMS toward the target eNB at Target cell place.
Present embodiment provides under the several scenes method that activates the MBMS business, has realized in the gravity treatment of UE sub-district or activates MBMS business in the Target cell before switching to Target cell, has guaranteed the gravity treatment of UE sub-district or has switched to MBMS business continuance after the Target cell.Present embodiment also provides the method for selectable expansion SFN area, has promptly guaranteed the continuity of UE MBMS business in moving process, has effectively utilized Internet resources again, can make UE receive the signal of enhancing simultaneously, improves reception.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (23)
1. the method for activating multimedia broadcast and multicast service is characterized in that, may further comprise the steps:
Determine target evolution base station;
Judge that whether described target evolution base station is just in the MBMS transmission business;
, send first message that is used for target evolution base station is added the content distribution tree, and send information of radio resource allocation to described target evolution base station when MBMS transmission is professional at described target evolution base station by multicast coordination entity MCE.
2. the method for claim 1 is characterized in that, described definite target evolution base station is meant: the user equipment (UE) that is in holding state is measured neighbor cell, and the adjacent evolution base station of coincidence measurement condition is defined as target evolution base station.
3. method as claimed in claim 2 is characterized in that, described target BS is the target evolution base station that described UE determines when carrying out the sub-district gravity treatment.
4. method as claimed in claim 2, it is characterized in that, described UE obtains the information of described target evolution base station about the MBMS business by the evolution base station of ownership, and judges that according to described information about the MBMS business whether described target evolution base station is just in the MBMS transmission business.
5. method as claimed in claim 2, it is characterized in that, described UE sends second message that is used to activate the MBMS business by the evolution base station of ownership to MCE, and described second message comprises the sign of described target evolution base station and is used for the sign of mark MBMS business.
6. method as claimed in claim 5 is characterized in that, MCE sends described first message after receiving described second message; Perhaps
Described target evolution base station sends described first message after receiving information of radio resource allocation.
7. the method for claim 1, it is characterized in that, described definite target evolution base station is meant: when the UE that is in state of activation switched, its ownership evolution base station carried out switch decision, and the evolution base station that will meet switching condition is defined as target evolution base station.
8. method as claimed in claim 7, it is characterized in that, described ownership evolution base station obtains the information of described target evolution base station about the MBMS business by described target evolution base station or MCE, and judges that according to described information about the MBMS business whether described target evolution base station is just in the MBMS transmission business.
9. method as claimed in claim 7 is characterized in that, described ownership evolution base station sends the handoff request message that comprises the sign that is used for mark MBMS business to described target evolution base station; After described target evolution base station is received described handoff request message, send second message that is used to activate the MBMS business to MCE, described second message comprises the sign that is used for mark MBMS business; Perhaps
Described ownership evolution base station sends second message that is used to activate the MBMS business to MCE, and described second message comprises the sign that is used for mark MBMS business.
10. method as claimed in claim 9 is characterized in that, MCE sends described first message after receiving described second message; Perhaps
Described target evolution base station sends described first message after receiving information of radio resource allocation.
11. the method for claim 1, it is characterized in that, described definite target evolution base station is meant: MCE measures resulting measurement result according to the UE that is in holding state to neighbor cell, and coincidence measurement condition and the evolution base station adjacent with the evolution base station of UE ownership are defined as described target evolution base station.
12. method as claimed in claim 11 is characterized in that, described MCE judges that about the information of MBMS business whether described target evolution base station is just in the MBMS transmission business according to the described target evolution base station of storage.
13. method as claimed in claim 11 is characterized in that, sends described first message by MCE; Perhaps, receive by described target evolution base station and send described first message after the information of radio resource allocation.
14. the method for claim 1, it is characterized in that, described definite target evolution base station is meant: MCE measures resulting measurement result according to UE to neighbor cell, and coincidence measurement condition and the evolution base station adjacent with the evolution base station of UE ownership are defined as described target evolution base station.
15. method as claimed in claim 2, it is characterized in that, the evolution base station of described UE by ownership sends the indication information of the MBMS business that described UE receiving to MCE, and described MCE judges that according to described indication information whether described target evolution base station is just in the MBMS transmission business.
16. method as claimed in claim 7, it is characterized in that, described ownership evolution base station sends the indication information of the MBMS business that described UE receiving to MCE, and described MCE judges that according to described indication information whether described target evolution base station is just in the MBMS transmission business.
17. as claim 15 or 16 described methods, it is characterized in that the indication information of the MBMS business that described UE is receiving comprises: it is one or more that service identifiers, single-frequency network area sign, interim multicast identifier TMGI, session identification Session ID, Target Cell Identifier, target evolution base station identify.
18. a subscriber equipment is characterized in that, comprising:
Measuring unit is used for neighbor cell is measured, and the adjacent evolution base station of coincidence measurement condition is defined as target evolution base station;
Receiving element is used for from belonging to the MBMS business information that evolution base station receives described target evolution base station;
Judging unit is used for judging that according to described MBMS business information whether described target evolution base station is just in the MBMS transmission business;
Transmitting element is used for sending second message that is used to activate the MBMS business in judged result for not the time, and described second message comprises the sign of described target evolution base station and is used for the sign of mark MBMS business.
19. an evolution base station is characterized in that, comprising:
Decision unit is used to carry out switch decision, and the evolution base station that will meet judgment condition is defined as target evolution base station;
Receiving element is used for receiving from described target evolution base station or MCE the MBMS business information of described target evolution base station;
Judging unit is used for judging that according to described MBMS business information whether described target evolution base station is just in the MBMS transmission business;
Transmitting element, be used for not sending the handoff request message that comprises the sign that is used for mark MBMS business to described target evolution base station for the time in judged result, perhaps send second message that is used to activate the MBMS business, perhaps further send first message that is used for target evolution base station is added the content distribution tree to MCE; Wherein, described second message comprises the sign of described target evolution base station and is used for the sign of mark MBMS business.
20. a multicast coordination entity is characterized in that, comprising:
Receiving element is used to receive the measurement result that user equipment (UE) sends;
Memory cell, the single-frequency network area location status information and the information of radio resource allocation that are used to store evolution base station;
Judging unit, be used for according to measurement result, coincidence measurement condition and the evolution base station adjacent with the evolution base station of described UE ownership are defined as target evolution base station, and judge according to the single-frequency network area state information of target evolution base station correspondence whether it is in single-frequency network area inside, judge that promptly whether it is just in the MBMS transmission business;
Transmitting element is used for not sending information of radio resource allocation to target evolution base station in judged result for the time, perhaps further sends first message that is used for target evolution base station is added the content distribution tree.
21. a communication system is characterized in that, comprising:
Subscriber equipment is used to receive the MBMS business datum, carries out sub-district gravity treatment or switching; When carrying out the sub-district gravity treatment, neighbor cell is measured and the evolution base station of coincidence measurement condition is defined as target evolution base station, and the MBMS business information of the target evolution base station that obtains according to the evolution base station from ownership judges that whether target evolution base station is just in the MBMS transmission business, and send second message that is used to activate the MBMS business when MBMS transmission is not professional, described second message comprises the sign of described target evolution base station and is used for the sign of mark MBMS business;
Evolution base station is used for transmitting described second message to described user device transmissions MBMS business datum and to multicast coordination entity MCE;
Described MCE is used for sending information of radio resource allocation according to described second message of receiving to described target evolution base station, and sends first message that is used for target evolution base station is added the content distribution tree.
22. a communication system is characterized in that, comprising:
Subscriber equipment is used to receive the MBMS business datum, and switches;
Evolution base station is used for to described user device transmissions MBMS business datum; In handoff procedure, carry out switch decision, and the evolution base station that will meet switching condition is defined as target evolution base station, and judge whether that according to the MBMS business information of the target evolution base station that obtains from target evolution base station or MCE it is just in the MBMS transmission business, and send second message that is used to activate the MBMS business to multicast coordination entity MCE when MBMS transmission is not professional, described second message comprises the sign of described target evolution base station and is used for the sign of mark MBMS business; Perhaps, when MBMS transmission is not professional, send the handoff request message that comprises the sign that is used for mark MBMS business, after receiving described handoff request message by described target evolution base station, send second message that is used to activate the MBMS business to MCE, described second message comprises the sign that is used for mark MBMS business;
Described MCE is used for sending information of radio resource allocation according to second message of receiving to described target evolution base station;
Wherein, described target evolution base station sends first message that is used for target evolution base station is added the content distribution tree after receiving information of radio resource allocation.
23. a communication system is characterized in that, comprising:
Subscriber equipment is used to receive the MBMS business datum, and transmission is measured resulting measurement result to neighbor cell;
Evolution base station is used for to described user device transmissions MBMS business datum, and sends described measurement result to multicast coordination entity MCE;
Described MCE, be used for measurement result according to the subscriber equipment transmission, the evolution base station of coincidence measurement condition is defined as target evolution base station, and judge whether that according to the MBMS business information of the target evolution base station of this locality storage it is just in the MBMS transmission business, and when MBMS transmission is not professional, send information of radio resource allocation, and send first message that is used for target evolution base station is added the content distribution tree to target evolution base station.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101356723A CN101242573B (en) | 2007-02-06 | 2007-03-12 | Method and system for activating multimedia broadcasting and multicast service |
| PCT/CN2008/070271 WO2008098508A1 (en) | 2007-02-06 | 2008-02-03 | Method and system for activating multimedia broadcast and multicast service |
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| CN200710004811 | 2007-02-06 | ||
| CN200710004811.9 | 2007-02-06 | ||
| CN2007101356723A CN101242573B (en) | 2007-02-06 | 2007-03-12 | Method and system for activating multimedia broadcasting and multicast service |
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| CN101242573B CN101242573B (en) | 2010-10-27 |
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| CN2007101356723A Active CN101242573B (en) | 2007-02-06 | 2007-03-12 | Method and system for activating multimedia broadcasting and multicast service |
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