CN101378528A - Method for notifying system message alteration on MBMS special carriers - Google Patents
Method for notifying system message alteration on MBMS special carriers Download PDFInfo
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- CN101378528A CN101378528A CNA200710120812XA CN200710120812A CN101378528A CN 101378528 A CN101378528 A CN 101378528A CN A200710120812X A CNA200710120812X A CN A200710120812XA CN 200710120812 A CN200710120812 A CN 200710120812A CN 101378528 A CN101378528 A CN 101378528A
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Abstract
The invention discloses a method for notifying the change of system information on a special MBMS carrier wave, which introduces a new structure of an MBMS notification channel (MICH). A system information change bit is arranged on the MBMS notification channel (MICH) of the special MBMS carrier wave; when the MBMS system information changes, a network side sets the system information change bit to be valid; UE determines that the system information changes according to the system information change bit on the MICH, and reads system information on a broadcast control channel (BCCH) of the special MBMS carrier wave again. The application of the method can efficiently notify UE on the information of system information change.
Description
Technical field
The present invention relates to the MBMS service technique, particularly a kind of on the MBMS special carrier method of notifying system message alteration.
Background technology
Multimedia broadcasting and multicast service (MBMS) are the new business that third generation partner plan (3GPP) proposes.In present Rel-7 TDD LCR MBMS system, utilize a special carrier to carry the MBMS business.This special use MBMS carrier wave can be regarded the sub-district of a MBMS single frequency network (MBSFN) pattern as, is the MBMS transmission business, and this sub-district comprises Broadcast Control Channel (BCCH), is used for transmission system message, comprises the configuration information of MCCH in this system message; MBMS notification channel (MICH) is used for MBMS transmission notice (MBMS Notification), thereby there is the modification of MCCH information at present in notice UE on this MBMS special carrier; MBMS control channel (MCCH) is used to transmit other MBMS control informations such as configuration information of MTCH; MBMS channel (MSCH) is used for the MBMS transmission schedule information; And MBMS Traffic Channel (MTCH), be used to transmit concrete MBMS business datum.
Subscriber equipment (UE) will receive the MBMS business datum, needs this UE to find corresponding M BMS special carrier, just adjusts to the sub-district of MBSFN pattern.Particularly, UE is at first resident in common non-MBSFN mode cell, receives the system message on this common sub-district BCCH, comprises the information of MBMS special carrier in this system message, for example frequency point information etc.; The MBMS special carrier that UE can use according to this MBMS special carrier information search, and after searching, carry out with it synchronously, thereby make UE be in the sub-district of MBSFN pattern.
Next, system message on the BCCH of UE reception MBMS special carrier, thereby obtain the relevant informations such as configuration information of MCCH, utilize this information on MCCH, to receive the configuration information of MTCH, like this, UE just can determine MTCH according to the configuration information of MTCH, thus just can be on MTCH receiving subscriber data.UE with the MBMS special carrier synchronously after, can be arranged in the sub-district of common sub-district and MBSFN pattern simultaneously, receive the system message of two sub-districts, and the reception of two type systematic message is separate, not mutual.
In said process, UE with the MBMS special carrier synchronously after, read the information of BCCH on the special carrier, after finishing the system message that receives on the BCCH on the special carrier, UE no longer reads the system message on the BCCH.The system message on the BCCH can have following problem like this: owing to may change on the special carrier, for example, when change has taken place for the configuration of MCCH, because UE no longer reads the system message on the BCCH, therefore can't know the variation of system message, thereby can't obtain the information such as configuration variation of MCCH, and then cause normally to receive the MBMS business datum.
For these reasons, network side need notify the UE system message to change by a kind of mode, so that it reads the system message on the BCCH again, with the synchro system configuration, guarantees the normal reception of MBMS business datum.And in present MBMS special carrier scheme, network side can't notify the UE system message to change, if use under the common sub-district or mode that MBSFN sub-district lower network side notice UE system message changes, then needing is by paging (Paging) process notice UE.Particularly, UE is in the paging cycle of configuration/calculating, at first read Page Indication Channel piece (PICHBlock), read paging channel piece (PCH Block) then, therefrom solve Paging message, determine that according to Paging message system message changes then, UE read system message again on BCCH.The system message alteration notice of utilizing above-mentioned Paging process to carry out, process is complicated and more consuming time, and may require configuration PICH and PCH on the MBMS special carrier, and just extra system resource is supported.
Summary of the invention
In view of this, the invention provides the method for notifying system message alteration on a kind of MBMS special carrier, can notify the information of UE system message alteration efficiently.
For achieving the above object, the present invention adopts following technical scheme:
A kind of on the MBMS special carrier method of notifying system message alteration, on the MBMS of MBMS special carrier notification channel MICH, the system message alteration bit is set in advance, this method comprises:
When the MBMS system message changes, described system message alteration bit is changed to effectively;
UE is according to the system message alteration bit on the MICH, determine that system message changes after, read the system message on the BCCH channel of broadcast control of MBMS special carrier again.
Preferably, the described system message alteration bit that is provided with on MICH is:
Employing is based on the structure of time slot of intermediate code, and MICH takies at least two subframes, and is used to carry in the time slot and code channel of MICH in a subframe therein, in the bilateral symmetry of intermediate code the system message alteration bit is set.
Preferably, the described system message alteration bit that is provided with on MICH is:
Employing is based on the structure of time slot of lead code, and MICH takies at least two subframes, and is used to carry in the time slot and code channel of MICH in a subframe therein, and the system message alteration bit is set after lead code.
Preferably, described MICH is positioned at the special time slot or the business time-slot of MBMS special carrier.
Preferably, this method further comprises: according to user in the system and professional demand, determine code channel, the time slot that MICH occupies and take number of sub-frames in advance.
As seen from the above technical solution, in the present invention, the system message alteration bit is set on the MICH of MBMS special carrier in advance, be set to effectively by this system message alteration bit, change has taken place in notice UE system message, UE reads the system message on the MBMS special carrier BCCH after receiving this system message alteration notice again.Thereby UE can in time be changed synchronously with the system configuration of network side, avoided other channel resources of configuration on special carrier on the other hand, the information of UE system message alteration is notified in realization too, has saved system resource.
Description of drawings
Fig. 1 be provided by the invention on the MBMS special carrier method overview flow chart of notifying system message alteration.
The MICH structural representation of Fig. 2 for disposing on the existing MBMS special carrier.
Fig. 3 be in the embodiment of the invention one on the MBMS special carrier method overview flow chart of notifying system message alteration.
Structural representation when Fig. 4 takies two subframes for MICH in the embodiment of the invention one.
Structural representation when Fig. 5 takies four subframes for MICH in the embodiment of the invention one.
Structural representation when Fig. 6 takies two subframes for MICH in the embodiment of the invention two.
Structural representation when Fig. 7 takies four subframes for MICH in the embodiment of the invention two.
Embodiment
For making purpose of the present invention, technological means and advantage clearer,, the present invention is described in further details below in conjunction with accompanying drawing.
Basic thought of the present invention is: utilize the channel resource that disposes on the existing MBMS special carrier
(MICH), the change of notice UE system message.
Fig. 1 be provided by the invention on the MBMS special carrier method overview flow chart of notifying system message alteration.As shown in Figure 1, this method comprises:
So far, notifying system message alteration method flow provided by the invention finishes.Mention in the background technology as described above, MICH is used for MBMS transmission notice (MBMS Notification), and UE can obtain the MBMS notice by monitoring MICH.Among the present invention, utilize UE to monitor the characteristic that MICH goes up message, whether change by the system message alteration bit notice UE system message that on MICH, is provided with, thereby make UE can in time receive the information of system message alteration, and then in time carry out system synchronization, the normal reception of assurance MBMS business datum with network side.
At present; with 1.28mcps TDD is example; on each channel of MBMS special carrier, be the unit beared information with the subframe; a subframe comprises 10 time slots; 7 business time-slot TS0, TS1, TS2, TS3, TS4, TS5 and TS6 are wherein arranged; and three special time slots, i.e. uplink pilot time slot (UpPTS), descending pilot frequency time slot (DwPTS) and protection time slot (GP).The MICH structure that disposes on the existing MBMS special carrier as shown in Figure 2; this MICH takies the code channel of two SF=16 of any one downlink business time slot in two subframes; wherein; with first subframe is example; in time slot i (i=0,1,2; 3; when 4,5,6) carrying MICH; middle bit is used to transmit intermediate code; carrying out channel estimating, last bit is used for transmission protection (GP) at interval, to prevent overlapping between different time-gap; all the other bits are used for the MBMS transmission notice; UE can receive the MBMS business datum with notice, and particularly, the bit number that is used for the MBMS transmission notice in two code channels of two subframes is 352 bits; because following two bits of QPSK modulation system are 1 symbol, therefore being scaled symbolic number is 176 symbols.
(MBMS notification indicator in the time of NI), is used to transmit the symbolic number L of a MBMS notice to MBMS transmission notice on MICH
NIMay be different, so the number N of the MBMS notice that once can transmit of MICH
NIAlso different.Concrete mapping relations are as shown in table 1.
| L NI＝2 | L NI＝4 | L NI＝8 | |
| N nper?radio?frame | 88 | 44 | 22 |
Table 1
Work as L
NIDuring=2 symbols, the MBMS number of notifications of a TTI transmission is 88, works as L
NIDuring=4 symbols, the MBMS number of notifications of a TTI transmission is 44, works as L
NIDuring=8 symbols, the MBMS number of notifications of a TTI transmission is 22.
After using the present invention, the bit with MICH goes up original part MBMS transmission notice is used for transmission system message alteration bit.Below by specific embodiment explanation the specific embodiment of the present invention.
Embodiment one:
Fig. 3 be in the embodiment of the invention one on the MBMS special carrier method overview flow chart of notifying system message alteration.As shown in Figure 3, this method comprises:
In the present embodiment, utilize the mode of a kind of new carrying MICH provided by the invention, particularly, MICH is set to be positioned on the special time slot.On this basis, MICH takies two subframes, and determines the code channel number that MICH takies according to demand.
Change the structure of MICH, add the system message alteration bit therein.Concrete MICH structure as shown in Figure 4.It is example that this structure takies a code channel with MICH, and other MICH place time slot adopts mode provided by the invention with described in setting that takies subframe such as the step 301.
As seen from Figure 4, MICH takies two subframes, wherein, preferably, the time slot i that MICH is arranged in second subframe, its concrete structure is identical with existing MICH structure, comprises intermediate code, GP and is used for the bit of MBMS transmission; The time slot i that MICH is arranged in first subframe, the position of intermediate code and GP is identical in intermediate code and GP and the existing MICH structure, and the system message alteration bit is set in the bilateral symmetry of intermediate code, the symbolic number of the concrete system message alteration bit stealing that is provided with is determined as required, be 4 symbols in the present embodiment, the bit among this time slot i except that intermediate code, GP and system message alteration bit is used for the MBMS transmission notice.Certainly, also can in two subframes that MICH takies, utilize second subframe that the system message alteration bit is set, make the structure of first subframe time slot i identical with existing MICH structure.Wherein, time slot i can be any one special time slot.
After finishing according to above-mentioned setting, promptly can utilize the information of system message alteration bit transfer system message alteration on the MICH, but simultaneously, the bit number that is used for the MBMS transmission notice can corresponding minimizing.Particularly, in the present embodiment, because MICH takies two subframes, so Transmission Time Interval (TTI) is 10ms, and in this TTI, the bit number that is used for MBMS transmission becomes 176-4=172 symbol by 176 original symbols.Therefore, when carrying out being provided with of system message alteration bit, the MICH structure after changing as previously mentioned, need the shared symbolic number of system message alteration bit reasonably be set, so that can satisfy the demand of MBMS transmission notice and system message alteration bit according to current system status.
In addition, for satisfying the demand of system transmissions MBMS notice and system message alteration bit, can also be for being provided with of MICH structure by taking code channel number and number of sub frames is adjusted, wherein, usually MICH takies at least two subframes.For example, the number of sub frames that MICH can be taken is adjusted into four subframes, as shown in Figure 5, in the subframe therein (among Fig. 5 be example with first subframe) in the time slot i at MICH place, the system message alteration bit is set (for example in the intermediate code bilateral symmetry, setting takies 4 symbols), the bit except that intermediate code, GP and system message alteration bit is used for the MBMS transmission notice, and the time slot i of its excess-three sub-frame keeps identical with existing MICH structure.Like this, because MICH takies four subframes, thereby make Transmission Time Interval (TTI) become 20ms, in the TTI of 20ms, the symbolic number that is used for the MBMS transmission notice is 352-4=348.The situation that takies two subframes with MICH is compared, and the number of MBMS transmission notice is improved.
The operation of above-mentioned steps 301～302 is operations of being carried out when in system the MICH structure being provided with.After this setting comes into force, just can use this MICH structure to carry out transfer of data always.When the generation systems message alteration, the notice of system message alteration is carried out in the operation of carrying out following step 303～306:
In this step, when system message changed, the system message alteration bit that MICH go up is provided with was changed to effectively, for example, was to represent effectively at 1 o'clock if set in advance this bit value, then this system message alteration bit was changed to 1.
In this step, UE monitors MICH according to existing implementation and goes up information transmitted, specifically can adopt the mode of regularly monitoring or continuing to monitor.Here just repeat no more.
In this step, UE extracts the system message alteration bit on the MICH, when this bit is changed to when effective, determine that change has taken place system message, and execution in step 306 is obtained the system message after the change, when this system message alteration bit is changed to when invalid, determine that system message does not change, return step 304 and continue to monitor MICH and go up information transmitted.
In this step, UE reads the system message after the change, determines the variation of system configuration, to guarantee normally to receive the MBMS business datum.For example,, on the MCCH of new configuration, receive data then, and obtain information such as MTCH configuration, and then on MTCH, obtain the MBMS business datum if determine that according to the system message after changing the configuration of MCCH changes.Then, return step 304 and continue to monitor upward information transmitted of MICH.
So far, the method flow in the present embodiment finishes.In the step 301 of present embodiment, MICH is set to be positioned on the special time slot of special carrier, in fact, also can still keep MICH and be set to be positioned on the business time-slot of special carrier, remaining subframe, code channel and concrete structure are formed setting and are still carried out according to the setting in the above-mentioned present embodiment.
Utilize aforesaid way, can realize utilizing the information of existing configuration notification UE system message alteration, can make on the one hand the UE can be in time synchronous with the variation of the system configuration of network side, other channel resources of configuration on special carrier have been avoided on the other hand, realize the information of efficient notification system message alteration, saved system resource.
Embodiment two:
At present, for improving the efficiency of transmission of business datum, propose a kind of new structure of time slot based on lead code (Preamble), in this structure of time slot, some bits of beginning are the lead code that is used to carry out channel estimating, substitute the intermediate code in original structure of time slot.Under the new structure of time slot of this class, use when of the present invention, for slightly different among the setting of system message alteration bit and the embodiment one.
Particularly, take the mode that subframe, the time slot that is arranged in and code channel all can adopt abovementioned steps 301 for MICH; When carrying out being provided with of system message alteration bit, after the lead code of a subframe, the subsequent bits position adjacent with lead code be set to the system message alteration bit.Particularly, take two subframes and four subframes are example with MICH, the structure of MICH as shown in Figure 6 and Figure 7.Wherein, structure when Fig. 6 takies two subframes for MICH, therein in the subframe (being first subframe among Fig. 6), four symbols of Preamble back are set to the system message alteration bit, the system message bit is not set in other subframe, the bit of transmission information all be can be used for MBMS transmission notice.Structure when Fig. 7 takies four subframes for MICH, equally therein in the subframe (being first subframe among Fig. 7), four symbols of Preamble back are set to the system message alteration bit, the system message bit is not set in other subframe, the bit of transmission information all be can be used for MBMS transmission notice.Just the system message alteration bit can be introduced MICH by the way, the MICH structural transmission data after system's utilization changes.When system message changes, can notify the change of UE system message according to the flow process of step 303～306.
By the foregoing description as seen, for structure of time slot based on intermediate code and lead code, all can be by making rational planning for, the system message alteration bit is set in MICH, the information that is used for the transmission system message alteration, thereby change has taken place in notice UE system message, and then the normal reception of assurance MBMS business datum is carried out synchronously in the variation that makes UE can be in time dispose with network side system.
Being preferred embodiment of the present invention only below, is not to 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 (5)
1, a kind of on the MBMS special carrier method of notifying system message alteration, it is characterized in that on the MBMS of MBMS special carrier notification channel MICH the system message alteration bit is set in advance, this method comprises:
When the MBMS system message changes, described system message alteration bit is changed to effectively;
UE is according to the system message alteration bit on the MICH, determine that system message changes after, read the system message on the BCCH channel of broadcast control of MBMS special carrier again.
2, method according to claim 1 is characterized in that, the described system message alteration bit that is provided with on MICH is:
Employing is based on the structure of time slot of intermediate code, and MICH takies at least two subframes, and is used to carry in the time slot and code channel of MICH in a subframe therein, in the bilateral symmetry of intermediate code the system message alteration bit is set.
3, method according to claim 2 is characterized in that, the described system message alteration bit that is provided with on MICH is:
Employing is based on the structure of time slot of lead code, and MICH takies at least two subframes, and is used to carry in the time slot and code channel of MICH in a subframe therein, and the system message alteration bit is set after lead code.
4, method according to claim 1 is characterized in that, described MICH is positioned at the special time slot or the business time-slot of MBMS special carrier.
5, method according to claim 1 is characterized in that, this method further comprises: according to user in the system and professional demand, determine code channel, the time slot that MICH occupies and take number of sub-frames in advance.
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| WO2010091608A1 (en) * | 2009-02-12 | 2010-08-19 | 中兴通讯股份有限公司 | Method, system and apparatus for transmitting a scheduling information of mbms control signaling |
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| WO2011160586A1 (en) * | 2010-06-22 | 2011-12-29 | 中兴通讯股份有限公司 | Statistical method and user equipment for multimedia broadcast multicast service |
| CN101902800B (en) * | 2009-05-26 | 2013-02-20 | 电信科学技术研究院 | Method and device for transmitting and receiving system information |
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| CN102088731A (en) * | 2009-12-03 | 2011-06-08 | 中国移动通信集团公司 | Method, system and equipment for indicating service data scheduling |
| CN102088661A (en) * | 2009-12-03 | 2011-06-08 | 中国移动通信集团公司 | Change indication method and acquisition method, system and equipment of MCCH (multipoint control channel) content |
| CN102123121A (en) * | 2010-01-07 | 2011-07-13 | 中兴通讯股份有限公司 | Multi-carrier communication system and system message updating method thereof |
| CN102123121B (en) * | 2010-01-07 | 2015-08-12 | 中兴通讯股份有限公司 | A kind of method of multi-carrier communications systems and system message update thereof |
| CN102143434A (en) * | 2010-01-29 | 2011-08-03 | 电信科学技术研究院 | Methods, system and device for transmitting system information and receiving MBMS |
| CN102143434B (en) * | 2010-01-29 | 2015-04-29 | 电信科学技术研究院 | Methods, system and device for transmitting system information and receiving MBMS |
| WO2011160586A1 (en) * | 2010-06-22 | 2011-12-29 | 中兴通讯股份有限公司 | Statistical method and user equipment for multimedia broadcast multicast service |
| WO2019061200A1 (en) * | 2017-09-28 | 2019-04-04 | 华为技术有限公司 | System message acquisition method and device, system message instruction method and device, and user equipment |
| CN111183676A (en) * | 2017-09-28 | 2020-05-19 | 华为技术有限公司 | System message acquisition and indication method, device and equipment |
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