CN101425914B

CN101425914B - Multimedia multicast service synchronization regulation method and reinforced base station

Info

Publication number: CN101425914B
Application number: CN2007101664067A
Authority: CN
Inventors: 黄曲芳; 王俊伟; 周晓
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2007-10-31
Filing date: 2007-10-31
Publication date: 2011-06-01
Anticipated expiration: 2027-10-31
Also published as: WO2009062436A1; CN101425914A

Abstract

The invention proposes a MBMS synchronous regulation method and enhanced base station (eNB). The method comprises eNB maps the time stamp of MBMS data pack received from MBMS gateway to initial transmission time interval (TTI), judges if the TTI is useful, namely that, initial TTI is allocated to the MBMS and is not occupied by other data pack of MBMS; when judging result is not useful, the eNB selects actual TTI for transmitting the MBMS data pack and adopts the actual TTI for transmitting the MBMS data pack. The inventive method can assure consistency of actual TTI of same MBMS data pack transmitted by eNB so as to implement synchronous regulation for MBMS, and that UE can correctly receives MBMS data pack.

Description

Method and enhanced base station that a kind of multimedia multicast service is adjusted synchronously

Technical field

The present invention relates to multimedia multicast service (MBMS, Multimedia Broadcast Multicast Service) field, method and enhanced base station (eNB, enhanced NodeB) that particularly a kind of MBMS adjusts synchronously.

Background technology

MBMS is one of important content of 3G (Third Generation) Moblie cooperative programme (3GPP, Third Generation Partnership Project) business development, is meant that mainly network side simultaneously sends to a plurality of recipients in the network to same multi-medium data.Than single user's transmission, MBMS has greatly saved interface-free resources.The 57th meeting of RAN3 proposed the framework of MBMS in Long Term Evolution (LTE, Long term Evolution), and as shown in Figure 1, Fig. 1 is the configuration diagram of MBMS in LTE.

In this framework, (GW's MBMS gateway Gateway) links to each other by the M1 interface with eNB, and the M1 interface is a pure interface in the user plane.MBMS GW and many sub-districts/multicast coordination entity (MCE, Multi-cell/Multicast Coordination Entity) link to each other by the M3 interface, and the M3 interface is a chain of command interface.Before MBMS begins, MBMS GW is by the service quality (QoS of M3 interface with MBMS, Quality of Service) parameter notice MCE, MCE determines transmission mode, available transmission mode has two kinds among the LTE: single sub-district (single-cell) pattern and many sub-districts (Multi-cell) pattern.Wherein, in the Multi-cell pattern, MBMS can adopt Single Frequency Network (SFN, Single Frequency Network) pattern; MBMS channel MTCH is mapped to transmission channel Multicast Channel (MCH, Multicast Channel) on, in a plurality of sub-districts, put multicast communication, each sub-district is at the identical identical packet of time transmission, subscriber equipment (UE, User Equipment) can receive the wireless signal of a plurality of sub-districts, and do and eat dishes without rice or wine to merge.

For the Multi-cell pattern, coordinate interface-free resources by MCE, comprise transmission rate, Transmission Time Interval (TTI, Transmission Time Interval) etc., and by M2 interface notice eNB; For each MBMS, MCE can distribute a part of TTI to use for it, when eNB receives the packet of certain MBMS from MBMS GW, can only transmit the packet of this MBMS in the TTI that MCE distributes for this MBMS.

Owing under (SFN, Single Frequency Network) pattern, need the transmission data time of each eNB in the unified single frequency network area (SFA, Single Frequency Network Area), UE can realize eating dishes without rice or wine merging.Therefore,, when eNB sends packet, each packet is all added a timestamp or adds timestamp one time every several packets at MBMS GW; After eNB received packet, for the packet of free stamp, then that timestamp is represented time map to unique Transmission Time Interval (TTI, Transmission Time Interval) sent packet at this TTI.Because the QoS information that MBMS GW only preserves MBMS, also unclear to the interface-free resources that reality is used, therefore can only determine the transmitting time of MBMS packet according to the transmission rate of MBMS, especially Mean Speed, for the MBMS packet is stamped timestamp, eNB corresponds to this timestamp on the concrete TTI again, sends the MBMS packet; Simultaneously, MCE has also determined to supply the TTI of its transmission for the packet of each MBMS.At this moment, the TTI (hereinafter to be referred as initial TTI) that eNB maps out according to the timestamp of certain MBMS packet might not distributed to this MBMS by MCE and use; Though perhaps initial TTI has been assigned to this MBMS and has used, but taken by the packet before this MBMS packet, the initial TTI that eNB maps out for this packet under the both of these case can not be used for sending this packet, must seek other TTI and send this packet.Because each eNB seeks other TTI and sends packet, so may be different for the actual transmission TTI of same each eNB of packet, will cause each eNB in the SFA asynchronous, thereby cause UE can not correctly receive MBMS.

Summary of the invention

The embodiment of the invention proposes the method that two kinds of MBMS adjust synchronously, can make each eNB all identical according to actual the transmissions TTI that the timestamp of MBMS packet draws, thereby assurance UE can correctly receive the MBMS packet.

The embodiment of the invention also proposes the eNB that a kind of MBMS adjusts synchronously, make each eNB all identical according to actual the transmissions TTI that the timestamp of MBMS packet draws, thereby assurance UE can correctly receive the MBMS packet.

Technical scheme of the present invention is achieved in that

The method that a kind of multimedia multicast service MBMS adjusts synchronously comprises:

The timestamp of the MBMS packet that eNB will receive from MBMS GW is mapped to initial TTI, judges whether described initial TTI is available, described being available as: initial TTI is assigned to described MBMS and uses and do not taken by other packets of described MBMS;

When judged result when being unavailable, the actual TTI that sends described MBMS packet is selected, adopt the actual TTI that selects to send described MBMS packet;

Wherein, describedly unavailablely be: when initial TTI is distributed to other MBMS and uses by many sub-districts/multicast coordination entity MCE, perhaps be: initial TTI is distributed to this MBMS by MCE and during by the packet absorb before this MBMS packet, selects after the initial TTI, the initial nearest available TTI of TTI of distance is actual TTI;

Perhaps, describedly unavailablely be: initial TTI is distributed to this MBMS by MCE and when partly being taken by the packet before this MBMS packet, selecting the unappropriated part of initial TTI is actual TTI; Perhaps, select after the initial TTI, the initial nearest available TTI of TTI of distance is actual TTI.

The timestamp of the MBMS packet that eNB will receive from GW is mapped to initial transmission time interval TTI, judge whether described initial TTI is available, described being available as: initial TTI is assigned to described MBMS and uses and do not taken by other packets of described MBMS;

Wherein, describedly unavailablely distributed to this MBMS by MCE and during for initial TTI by some or all of the taking of packet before this MBMS packet, if the packet before described has no time to stab and described MBMS packet belongs to emergence message or priority is higher than preceding packet, then selecting described initial TTI is actual TTI.

A kind of eNB comprises:

Judge module, the timestamp that is used for the MBMS packet that will receive from MBMS GW is mapped to initial TTI, judges whether described initial TTI is available;

Select module, be used for judged result when described judge module and be initial TTI when unavailable, the actual TTI of described MBMS packet is selected; Wherein, when described unavailable when being distributed to other MBMS and use by MCE, select after the initial TTI for initial TTI, the initial nearest available TTI of TTI of distance is actual TTI;

Perhaps, when described unavailable, select after the initial TTI for initial TTI is distributed to this MBMS by MCE and during by the packet absorb before this MBMS packet, the initial nearest available TTI of TTI of distance is actual TTI;

Perhaps, when described unavailable for initial TTI is distributed to this MBMS by MCE and when partly being taken by the packet before this MBMS packet, selecting the unappropriated part of initial TTI is actual TTI or to select after the initial TTI apart from its nearest available TTI be actual TTI;

Sending module is used for selecting the selected actual TTI of module to send described MBMS packet.

Method and eNB that the MBMS that the present invention proposes adjusts synchronously, when the initial TTI that can map out at the timestamp of MBMS packet is unavailable, selecting suitable actual TTI for this MBMS packet sends, and each eNB sends the actual TTI unanimity of same MBMS packet, thereby realize that MBMS adjusts synchronously, guarantee that UE can correctly receive the MBMS packet.

Description of drawings

Fig. 1 is the configuration diagram of MBMS in LTE;

Fig. 2 is the method flow diagram that embodiment of the invention MBMS adjusts synchronously;

Fig. 3 is the processing mode flow chart of embodiment of the invention eNB to the MBMS packet;

Fig. 4 is the sequential schematic that sends the MBMS packet under the channel multiplexing situation;

Fig. 5 is that embodiment one eNB adopts the method for the present invention's adjustment synchronously to send the specific implementation schematic diagram of MBMS packet;

Fig. 6 is that embodiment two eNB adopt the method for the present invention's adjustment synchronously to send the specific implementation schematic diagram of MBMS packet;

Fig. 7 is that embodiment three eNB adopt the method for the present invention's adjustment synchronously to send the specific implementation schematic diagram of MBMS packet;

Fig. 8 is that embodiment four eNB adopt the method for the present invention's adjustment synchronously to send the specific implementation schematic diagram of MBMS packet.

Embodiment

The embodiment of the invention proposes the method that a kind of MBMS adjusts synchronously, and referring to Fig. 2, Fig. 2 is the method flow diagram that embodiment of the invention MBMS adjusts synchronously, comprising:

The timestamp of the MBMS packet that step 201:eNB will receive from MBMS G W is mapped to initial TTI, judge whether described initial TTI is available, described being available as: initial TTI is distributed to described MBMS by MCE and uses and do not taken by other packets of described MBMS;

Step 202: when judged result when being unavailable, the actual TTI that sends described MBMS packet is selected, adopt the actual TTI that selects to send described MBMS packet.

Specifically, when eNB receives the MBMS packet of free stamp from MBMS GW, and after this timestamp is mapped to initial TTI, judge whether following two conditions are set up:

(1) whether initial TTI is distributed to this MBMS use by MCE;

(2) whether initial TTI is taken by the preceding bag of this MBMS.

After the judgement, processing mode is as shown in table 1.

Table 1

" sending immediately following previous packet " described in the last table can refer to begin to send from the available TTI of the next one; The cascade that also can control (RLC, Radio Link Control) layer by Radio Link realizes " closelying follow ".The cascade of rlc layer is described below: if the packet of previous bag is less, not with the TTI absorb, then a preceding part and the last data bag of current data packet can be cascaded into a medium access control (MAC, Medium Access Control bag), send at same TTI.ENB all in same SFA will select identical processing mode, select any mode can be by standard code, also can be by MCE or operation and maintenance equipment (O﹠amp; M, Operation and Maintenance) configuration.

So when judged result when being unavailable, the particular content difference of " unavailable " is then selected actual TTI in different ways.Specifically comprise:

Described unavailable when being distributed to other MBMS and use by MCE for initial TTI, select after the initial TTI, the initial nearest available TTI of TTI of distance is actual TTI.

Described unavailable for initial TTI is distributed to this MBMS by MCE and during by the preceding packet absorb of this MBMS packet, select after the initial TTI, the initial nearest available TTI of TTI of distance is actual TTI.

Describedly unavailablely distributed to this MBMS by MCE and when partly being taken, select the unappropriated part of initial TTI to be sent as actual TTI for initial TTI by the preceding packet of this MBMS packet; Perhaps, select after the initial TTI, the initial nearest available TTI of TTI of distance is actual TTI.

According to the mode of the actual TTI of above-mentioned selection, when receiving a concrete packet, eNB can adopt mode shown in Figure 3 to handle, and Fig. 3 is the processing mode flow chart of embodiment of the invention eNB to the MBMS packet.

Step 301:eNB maps out initial TTI after receiving the MBMS packet that has timestamp, judges whether this initial TTI arrives.If arrive, then execution in step 302; Otherwise, continue execution in step 301.

Whether step 302: judging has the packet that does not send as yet before this packet, if having, wait for that then previous packet sends after, select available TTI to send again; If no, execution in step 303 then.

Step 303: judge whether this initial TTI is distributed to this MBMS by MCE, if then on this initial TTI, send this MBMS packet; Otherwise, wait for the next TTI that distributes to MBMS, send this MBMS packet.

Two judgements of above-mentioned steps 302 and step 303 also can exchange sequence, judges at first promptly whether initial TTI is distributed to this MBMS by MCE, judges afterwards whether initial TTI is taken by the preceding bag of this MBMS again.Executive mode after judging repeats no more as described in the above-mentioned table 1.

Two adjacent MBMS packets, stab if previous packet is not free, the band in back stabs if having time, and the eNB transmitting time that to be previous packet calculate is that the transmitting time that a back bag is stipulated is conflicted mutually with MBMS GW, then can adopt above-mentioned mode, the transmitting time that is a back packet postpones, and waits previous packet to send afterwards and sends.But at some in particular cases, can abandon previous packet, send a back packet at MBMS GW official hour; Or send a back packet at MBMS GW official hour, send previous packet then.

This situation includes but not limited to:

---two packets are from different MBMS, and the MBMS priority under the back packet is higher, and MCE has stipulated and must send on time.

---a back bag belongs to emergence message, as earthquake warning, fire etc.

That is: when judged result when being unavailable, the step that the actual TTI that sends described MBMS packet is selected can comprise:

Describedly unavailablely distributed to this MBMS by MCE and during for initial TTI by some or all of the taking of preceding packet of this MBMS packet, if described preceding packet has no time to stab and described MBMS packet belongs to emergence message or priority is higher than preceding packet, then selecting described initial TTI is actual TTI.

If MBMS GW only is equipped with timestamp to a part of MBMS packet, the then not free packet that stabs sends immediately following preceding bag.That is: said method may further include:

ENB receives the not free MBMS packet that stabs from MBMS GW, selects available TTI to send described MBMS packet.

Because the time and the timestamp official hour of the actual transmission of eNB MBMS packet have difference, eNB can measure this difference, and asks MCE to change the interface-free resources distribution condition of this MBMS under suitable condition, makes that the distribution of interface-free resources is more reasonable.Concrete measure and request mode can for:

Mode one:

Measure the difference of represented time of actual TTI and timestamp, when described difference surpassed predefined time difference thresholding, eNB increased interface-free resources to the MCE request; After MCE received described request, all eNB in single frequency network area SFA sent the instruction of the interface-free resources that increases described MBMS use.

Above-mentioned difference can be the difference of single measurement, also can be mean value or other statisticss of repeatedly measuring.

Described time difference thresholding can be by standard code, also can be by MCE or O﹠amp; The M configuration.

Mode two:

Measure vacant TTI quantity in the predefined time period, when described quantity surpassed predefined vacant thresholding, eNB reduced interface-free resources to the MCE request; After MCE received described request, all eNB in SFA sent the instruction of the interface-free resources that reduces described MBMS use.

Above-mentioned Measuring Time section and vacant thresholding can be by standard codes, also can be by MCE or O﹠amp; The M configuration.

ENB will pass through certain hour after receiving the instruction of the increase and decrease interface-free resources that MCE sends at least, can send the request of adjusting interface-free resources to MCE once more.Concrete blanking time can be by the MCE configuration or by standard code.That is: above-mentioned MCE may further include after eNB sends instruction: through after the predefined time period, and the step that continues to carry out described measurement and increase or reduce interface-free resources to the MCE request.

On the other hand, after MCE receives the request of change MBMS interface-free resources of eNB, also can after MBMS GW report is received, can dynamically revise by the M3 interface to MBMS GW report to definite algorithm of timestamp.That is, after above-mentioned MCE receives described request, may further include: MCE notifying MBMS GW dynamically revises definite algorithm of timestamp.

Said method does not consider that eNB adds the scene of SFA in sending process data packet.Because eNB may have deviation with MBMS GW official hour in the time of the actual transmission packet of eating dishes without rice or wine, the eNB that then newly adds SFA need at first be known and the actual transmitting time of interior other eNB of SFA begins to send the MBMS packet again.

That is, said method may further include: when eNB adds SFA, obtain the real time of other eNB transmissions MBMS packet in the described SFA, with described other eNB synchronized transmissions MBMS packet.

Obtain other eNB send the MBMS packet real time mode can for:

---send apply for information by X2 interface to other eNB, obtain the real time that other eNB send the MBMS packet;

---perhaps, receive other eNB, measure the real time that sends this MBMS packet at the MBMS packet of eating dishes without rice or wine to send.

Perhaps, also can realize synchronized transmission by receiving (Reset) message of resetting from MCE with other eNB.MBMS GW has the packet of timestamp to some, simultaneously issue Reset message to eNB, this message can send to eNB together with packet, also can send to eNB by other channels, is used to notify eNB to send this packet at the nearest available TTI of distance timestamp.

Therefore, said method may further include: when reception comprises the MBMS packet of timestamp, receive the Reset message that MBMS GW sends, the nearest available TTI of chosen distance timestamp sends described MBMS packet.

Perhaps, other eNB that eNB is also available and SFA is interior consult replacement time point and replacement MBMS packets, and the nearest available TTI of the described replacement time point of chosen distance sends described replacement MBMS packet.

Such as: through consulting, it is that 11:10:20, replacement MBMS packet are that timestamp is the packet of 11:10:20 that eNB selects the replacement time point, then when the time arrives 11:10:20, select this moment nearest available TTI afterwards, transmitting time is stabbed and is the packet of 11:10:20.

The timestamp of replacement MBMS packet also can be early than the replacement time point, selecting the replacement time point as eNB is that 11:10:20, replacement MBMS packet are that timestamp is the packet of 11:10:10, then when the time arrives 11:10:20, select this moment nearest available TTI afterwards, transmitting time is stabbed and is the packet of 11:10:10.

Each eNB among the SFA at the synchronization same packet of resetting, then can realize eNB synchronized transmission packet.Certainly, above-mentioned replacement all only at a kind of MBMS packet, just can not have influence on the transmission of other data for the replacement of every kind of MBMS packet.

If broadcast a plurality of MBMS in the same SFA simultaneously, and partly or entirely MTCH is mapped to same MCH, and the MBMS GW in the existing framework does not also know that the channel multiplexing of MBMS concerns, the timestamp that each MBMS packet is beaten may be identical.In this case, eNB can be according to the priority or the TMGI ordering of business, and order sends the packet of each MBMS.

That is: said method may further include: eNB receives the packet of different MBMS from MBMS GW, when the initial TTI that maps out when described packet timestamp is identical, priority or interim mobile group character (TMGI according to MBMS, Temporary Mobile Group Identifier) to the data packet sequencing of different MBMS, order sends the packet of each MBMS.

Referring to Fig. 4, Fig. 4 is the sequential schematic that sends the MBMS packet under the channel multiplexing situation.When the timestamp of packet A1 and B1 was 11:35:55, the initial TTI that two packets map out was identical.At this moment, because the priority of professional B is higher than professional A, select to send packet A1 in TTI1 (time corresponding is 11:35:55) transmission packet B1, back earlier.

Below lift specific embodiment, introduce the specific implementation flow process that eNB adopts the method transmission MBMS packet of the present invention's adjustment synchronously in detail.

Embodiment one:

Referring to Fig. 5, Fig. 5 is that embodiment one eNB adopts the method for the present invention's adjustment synchronously to send the specific implementation schematic diagram of MBMS packet.

In the present embodiment, when MBMS began, MBMS GW sent packet A1, A2, A3 and A4 to eNB, wherein has only A1 and A4 to have timestamp.Long data packet just in time with the equal in length of cutting apart of RLC, need not through segmentation at RLC.

After eNB received packet, for A1, the transmitting time of eating dishes without rice or wine of MBMS GW regulation was 11:35:50, and eNB is from 11:35:50, and seeking MCE is the TTI of this traffic assignments, the TTI that first that finds is available, and its time corresponding is 11:35:55.So eNB sends A1 constantly at TTI1.

Because A2, A3 are not with timestamp, and then eNB sends A2 at available TTI3, sends A3 at TTI5.

For A4, the transmitting time of MBMS GW regulation is 11:35:59, and the next available pairing time of TTI7 is 11:35:58, so TTI7 is vacant, does not send any data.By the time next available TTI9, its time corresponding just in time equals the transmitting time that MBMS GW is the A4 regulation, so send A4 at TTI9.

Embodiment two:

Referring to Fig. 6, Fig. 6 is that embodiment two eNB adopt the method for the present invention's adjustment synchronously to send the specific implementation schematic diagram of MBMS packet.The difference of present embodiment and embodiment one only is: MBMS GW is that the transmitting time of A4 regulation is 11:35:57.

ENB is that the transmitting time that A4 calculates is TTI5, and is that the transmitting time that A3 calculates also is TTI5, and the two clashes, and then sends A3 at TTI5, and A4 is postponed to TTI7 and sent.

Embodiment three:

Referring to Fig. 7, Fig. 7 is that embodiment three eNB adopt the method for the present invention's adjustment synchronously to send the specific implementation schematic diagram of MBMS packet.

In the present embodiment, when MBMS began, MBMS GW sent packet A1, A2, A3, A4 to eNB, and MBMS GW beats timestamp to the data inter-packet gap, had only A1, A4 to have timestamp.Packet length differs, and A1 and A4 are bigger than the section length of RLC, and the bag length of A2 equals the section length of RLC, and the bag length of A3 is less than the section length of RLC.

After eNB received packet, for A1, the transmitting time of eating dishes without rice or wine of MBMS GW regulation was 11:35:50, and eNB is from 11:35:50, and seeking MCE is the TTI of this traffic assignments, the TTI that first that finds is available, and its time corresponding is 11:35:55.So eNB sends the first of A1 constantly at TTI1.Send the second portion of A1 at the available TTI3 of the next one.

Stab because A2 is not free, eNB seeks next available TTI5 from TTI3, sends A2.

A3 is also not free to be stabbed, and eNB seeks next available TTI7 from TTI5, and the absolute time of TTI7 correspondence is 11:35:58, more late than the transmitting time of A4 bag regulation, so send the preceding part of A3 bag and A4 bag at TTI7.

ENB seeks next available TTI9 from TTI7, sends the back part of A4.

Embodiment four:

Referring to Fig. 8, Fig. 8 is that embodiment four eNB adopt the method for the present invention's adjustment synchronously to send the specific implementation schematic diagram of MBMS packet.The difference of present embodiment and embodiment three only is: MBMS GW is that the transmitting time of A4 regulation is 11:35:59.

Because for the transmitting time of A4 regulation is 11:35:59, then eNB only sends the A3 bag at TTI7, because the A3 bag is smaller, can inserts the filling field in the vacant part of TTI7, or not send any data.The transmitting time of next available TTI9 correspondence is 11:35:59, and is identical with the transmitting time of aGW regulation, so begin to send the A4 bag from TTI9.

Under the both of these case of present embodiment and embodiment three, all the A4 bag is cut apart, but the cut-point difference.

The embodiment of the invention also proposes a kind of eNB, comprising:

Select module, be used for judged result when described judge module and be initial TTI when unavailable, the actual TTI of described MBMS packet is selected;

Among the above-mentioned eNB, select module to be used for:

When described unavailable when being distributed to other MBMS and use by MCE, select after the initial TTI, the initial nearest available TTI of TTI of distance is actual TTI for initial TTI;

Perhaps, when described unavailable, select after the initial TTI for initial TTI is distributed to this MBMS by MCE and during by the preceding packet absorb of this MBMS packet, the initial nearest available TTI of TTI of distance is actual TTI;

Perhaps, when described unavailable for initial TTI is distributed to this MBMS by MCE and when partly being taken by the preceding packet of this MBMS packet, selecting the unappropriated part of initial TTI is actual TTI or to select after the initial TTI apart from its nearest TTI that can week be actual TTI.

To sum up, method and eNB that the MBMS that the embodiment of the invention proposes adjusts synchronously, when the initial TTI that can map out at the timestamp of MBMS packet is unavailable, adopting different selection modes to select suitable actual TTI for this MBMS packet sends, and each eNB sends the actual TTI unanimity of same MBMS packet, thereby realize that MBMS adjusts synchronously, guarantee that UE can correctly receive the MBMS packet.And when the time that reality sends the MBMS packet surpassed certain thresholding with timestamp official hour difference, the embodiment of the invention can also be changed the interface-free resources distribution condition of this MBMS to the MCE request by eNB, make that the distribution of interface-free resources is more reasonable.

In sum, more than only be displaying to spirit of the present invention, but not be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. the method adjusted synchronously of a multimedia multicast service MBMS is characterized in that described method comprises:

The timestamp of the MBMS packet that enhanced base station eNB will receive from MBMS gateway GW is mapped to initial transmission time interval TTI, judge whether described initial TTI is available, described being available as: initial TTI is assigned to described MBMS and uses and do not taken by other packets of described MBMS;

2. method according to claim 1 is characterized in that, described method further comprises:

3. method according to claim 1 is characterized in that, described method further comprises:

4. method according to claim 3 is characterized in that, described MCE further comprises after eNB sends instruction: through after the predefined time period, and the step that continues to carry out described measurement and increase interface-free resources to the MCE request;

And/or, after described MCE receives described request, further comprise:

MCE notifying MBMS GW dynamically revises definite algorithm of timestamp.

5. method according to claim 1 is characterized in that, described method further comprises:

6. method according to claim 5 is characterized in that, described MCE further comprises after eNB sends instruction: through after the predefined time period, and the step that continues to carry out described measurement and reduce interface-free resources to the MCE request;

And/or, after described MCE receives described request, further comprise:

MCE notifying MBMS GW dynamically revises definite algorithm of timestamp.

7. method according to claim 1 is characterized in that, described method further comprises:

When eNB adds SFA, obtain the real time of other eNB transmissions MBMS packet in the described SFA, with described other eNB synchronized transmissions MBMS packet.

8. method according to claim 7 is characterized in that, the described mode of obtaining the real time of other eNB transmissions MBMS packet is:

Send apply for information by X2 interface to other eNB, obtain the real time that other eNB send the MBMS packet;

Perhaps, receive other eNB, measure the real time that sends this MBMS packet at the MBMS packet of eating dishes without rice or wine to send.

9. method according to claim 1 is characterized in that, described method further comprises:

After eNB adds SFA, when reception comprises the MBMS packet of timestamp, receive the replacement Reset message that MCE sends, the nearest available TTI of chosen distance timestamp sends described MBMS packet;

Perhaps, with other eNB negotiation replacement time point and replacement MBMS packets in the described SFA, the nearest available TTI of the described replacement time point of chosen distance sends described replacement MBMS packet.

10. method according to claim 1 is characterized in that, described method further comprises:

ENB receives the packet of different MBMS from MBMS GW, when the initial TTI that maps out when described packet timestamp is identical, according to the priority of MBMS or the interim mobile group character TMGI data packet sequencing to different MBMS, order sends the packet of each MBMS.

11. the method that multimedia multicast service MBMS adjusts synchronously is characterized in that described method comprises:

12. method according to claim 11 is characterized in that, described method further comprises:

13. method according to claim 11 is characterized in that, described method further comprises:

14. method according to claim 13 is characterized in that, described MCE further comprises after eNB sends instruction: through after the predefined time period, and the step that continues to carry out described measurement and increase interface-free resources to the MCE request;

And/or, after described MCE receives described request, further comprise:

MCE notifying MBMS GW dynamically revises definite algorithm of timestamp.

15. method according to claim 11 is characterized in that, described method further comprises:

16. method according to claim 15 is characterized in that, described MCE further comprises after eNB sends instruction: through after the predefined time period, and the step that continues to carry out described measurement and reduce interface-free resources to the MCE request;

And/or, after described MCE receives described request, further comprise:

MCE notifying MBMS GW dynamically revises definite algorithm of timestamp.

17. method according to claim 11 is characterized in that, described method further comprises:

18. method according to claim 17 is characterized in that, the described mode of obtaining the real time of other eNB transmissions MBMS packet is:

19. method according to claim 11 is characterized in that, described method further comprises:

20. method according to claim 11 is characterized in that, described method further comprises:

21. an enhanced base station is characterized in that, described enhanced base station comprises: