CN101925193A

CN101925193A - Frame structure configuration method and system message acquisition method

Info

Publication number: CN101925193A
Application number: CN2009101458425A
Authority: CN
Inventors: 陈中明; 杜忠达
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2009-06-11
Filing date: 2009-06-11
Publication date: 2010-12-22

Abstract

The invention discloses a frame structure configuration method and a system message acquisition method. In the frame structure configuration method, a measuring gap is set in a frame structure, wherein the cycle of the measuring gap is P milliseconds, and P is a positive number which can not be exactly divided by the minimum repeat cycle of a system message to be read in the measuring gap. By setting the measuring gap (i.e. the cycle of the gap), the invention realizes that UE can read the system message to be read in the gap so as to perform subsequent access operation and other operations based on information in the system message.

Description

Frame structure configuration method and system message acquisition method

Technical field

The present invention relates to the communications field, particularly, relate to frame structure configuration method and system message acquisition method.

Background technology

In order to improve indoor covering, improve the indoor access rate in broadband, to reduce time delay etc., drawn Home eNodeB (Home NB or HNB).As a kind of radio reception device, Home eNodeB can provide various wireless access functions, and can reduce the load of (being called macrocell again) of common sub-district, is a kind of indoor preferably coverage optimization method case.

For some Home eNodeB, its permission inserts through the user who authorizes and for the user who gets involved provides service, the sub-district that this Home eNodeB covers is called non-public authorized user group (Closed Subscriber Group is called for short CSG) sub-district.Corresponding, some Home eNodeB had both allowed to insert and provide service for these users through the user who authorizes, allow again through user's access of mandate and for these users provide service, the sub-district that this Home eNodeB covers is called mixing (Hybrid) sub-district.At authorizing and undelegated user, the role that Hybrid serves as the sub-district is different, and for the user through authorizing, it is regarded as the CSG sub-district, and for not through the user of mandate, it is regarded as open sub-district (that is macrocell).

The CSG sub-district is at cell broadcasting system message blocks 1 (System Information Block1, abbreviate SIB1 as) in carry CSG indication, to subscriber equipment (User Equipment, abbreviate UE as) show that this sub-district is a CSG sub-district, simultaneously, there is the non-public authorized user group # of an ownership each CSG sub-district, is called CSG ID (CSG Identity).Also there is the CSG ID of an ownership each Hybrid sub-district.According to whether supporting CSG, the user can be divided into two classes eventually, and a class is to support the UE (CSG UE) of CSG, and another kind of is the UE (non-CSG UE) that does not support CSG.Because there is the advantage on the rate CSG sub-district or Hybrid sub-district, the load that can alleviate macrocell again simultaneously, so CSG UE CSG sub-district or the Hybrid sub-district access network by being authorized to as much as possible.Virtual network operator can keep a part of physical resource when the network planning, for example, and physical layer identifications (Physical Cell identity, abbreviate PCI as), use for the CSG sub-district specially, and can will should configuration give UE by broadcast announcement, the Hybrid sub-district does not take this part PCI resource.UE can judge by the scanning of physical layer whether the sub-district is the CSG sub-district.In addition, in the CSG sub-district or Hybrid sub-district when setting up, can select the optimum frequency of a permission to use voluntarily, and the setting of CSG sub-district or Hybrid sub-district for macrocell less than precognition.

Because the PCI of CSG sub-district or Hybrid sub-district selects in the scope of reserving voluntarily when CSG sub-district or Hybrid sub-district are set up, therefore, can exist different CSG sub-districts or different Hybrid sub-districts to use the situation of identical PCI, the Hybrid sub-district can not take the PCI resource of CSG sub-district certainly.In order to address this problem, UE can be by (the Cell Global Identifier of the global cell identity among the broadcasting SIB 1 that reads CSG sub-district or Hybrid sub-district, abbreviation CGI) distinguishes CSG sub-district or Hybrid sub-district, this be because, CGI is unique in public land mobile telephone network (Public Land Mobile Network abbreviates PLMN as) scope.In addition, the CSG sub-district only allows to insert and provide service for these users through the user who authorizes, that is to say, the CSG sub-district only allows to have in the CSG ID tabulation (Allowed CSG ID List) that allows the UE of the CSG ID of this CSG sub-district ownership to insert, therefore, at the connection control method based on UE, the CSG ID that UE need read among the CSG Cell Broadcast CB SIB 1 carries out initial access control.For the Hybrid sub-district, the Member Users who belongs to this Hybrid sub-district through the user who authorizes, the non-Member Users who does not belong to this Hybrid sub-district through the user who authorizes, network need be distinguished Member Users and non-Member Users and carry out network optimization action, and whether therefore also need UE to read that CSG ID among the Hybrid Cell Broadcast CB SIB 1 distinguishes is the Member Users.According to Long Term Evolution (Long-Term Evolution, abbreviate LTE as) the system message scheduling mechanism of system, read before the SIB1, must at first read main system message (Main Information Block, abbreviate MIB as, also can be called main message blocks), draw the problem how UE reads MIB and SIB1 thus.

In the LTE system, MIB has the 40 milliseconds fixing transmission cycle, and repeats in the #0 subframe of each radio frames of MIB in the transmission cycle to send.SIB1 has 80 milliseconds fixing dispatching cycle, SIB 1 satisfies System Frame Number (System Frame Number in dispatching cycle, be called for short SFN) repeated to send by the 2 #5 subframes (subframe is numbered since 0) that divide exactly the radio frames of (SFN%2=0), as shown in Figure 1.

Universal mobile telecommunications system (Universal Mobile Telecommunications System, abbreviate UMTS as) in, the CSG indication information is broadcasted in MIB, CGI and CSG ID broadcast in MIB and SIB3, therefore for the UMTS system, this problem becomes how to read MIB and SIB3.

The frame length of UMTS system is 15slots, 10 milliseconds (ms).MIB has the transmission cycle of fixing 8 frames (80ms), and the schedule information of SIB3 can be described in MIB, and adopting following parameter with SIB3 here is that example illustrates, as shown in Figure 2: SEG_COUNT=1, SEG_REP=32, SIB_POS=6.

At present, in the LTE system, for UE can normally carry out alien frequencies, isosystem measurement, network side can also can be called free time for UE allocating and measuring gap (gap).Measurement clearance is that the user is exclusively used in a period of time of carrying out alien frequencies, isosystem measurement, and during this period of time, the user does not send any data, UE be tuned to the frequency at alien frequencies, isosystem measurement object place measure.Gap has two kinds of patterns, pattern 0 and pattern 1.The cycle of gap is 40ms in the pattern 0, and the time started can be any subframe in the one-period, and length is 6ms.The cycle of gap is 80ms in the pattern 1, and the time started can be any subframe in the one-period, and length is 6ms.

UE reads the MIB and the minimum 6ms of needs of SIB1 of adjacent area.Under adjacent area and situation that the Serving cell frame boundaries aligns, accurately dispose MIB and SIB1 that gap might be able to read the adjacent area.But, under adjacent area and Serving cell frame boundaries situation devious, the configuration mode of free time just can not read MIB and SIB1 at present, for adjacent area and Serving cell is the situation of alien frequencies, can not read MIB and SIB1, because UE needs the conversion work frequency, this conversion operations need take the time among the gap, as shown in Figure 3.

In the UMTS system, under compact model, the length of gap has only 14 slot, and less than 10 milliseconds, and all be 20 milliseconds the dispatching cycle of MIB and SIB3, and therefore, UE reads less than MIB and SIB3.

Summary of the invention

Considering that the UE that exists in the correlation technique reads less than the problem of MIB and SIB proposes the present invention, and for this reason, the present invention aims to provide a kind of improved system message and obtains scheme, in order to address the above problem.

According to an aspect of the present invention, provide a kind of frame structure configuration method.

In this frame structure configuration method, measurement clearance is set in frame structure, wherein, the cycle of measurement clearance is the P millisecond, the positive number of P for not divided exactly by the minimum repetition period of the system message that will read in measurement clearance.

Preferably, system message comprises main message blocks and System information block.Preferably, the positive number of P for not divided exactly by the minimum repetition period of the minimum repetition period of main message blocks and System information block.Preferably, the duration of measurement clearance is the N millisecond, and N is greater than the greater in the transmission time interval of transmission time interval of main message blocks (Transmission Time Interval is called for short TTI) and System information block.

Preferably, the duration of measurement clearance is the N millisecond, and N is greater than the transmission time interval of system message.

Preferably, duration is continuous N millisecond; Perhaps, duration is the time period of a plurality of spaces.

Preferably, system message is main message blocks or System information block.

According to a further aspect in the invention, also provide a kind of system message acquisition method.

In this system message acquisition method, pre-configured measurement interval, and with the configuration information notifying user equipment, wherein, configuration information comprises measures cycle P at interval, the positive number of P for not divided exactly by the minimum repetition period of the system message that will read in measurement clearance; When measurement is activated at interval, in measuring duration at interval, obtain system message.

Preferably, system message comprises main message blocks and System information block, the positive number of P for not divided exactly by the minimum repetition period of the minimum repetition period of main message blocks and System information block.Preferably, configuration information also comprises measures duration N at interval, and N is greater than the greater in the transmission time interval of the transmission time interval of main message blocks and System information block.

Preferably, configuration information also comprises measures duration N at interval, and N is greater than the transmission time interval of system message.

Preferably, configuration information also comprises the activation moments of measurement clearance and/or measures the time started at interval, and wherein, the time started is for measuring the time that the initial moment at interval postpones with respect to the initial border of the frame of Serving cell or subframe.

Preferably, activation moments is one of following: specify constantly, receive the current System Frame Number of configuration information next System Frame Number, satisfy the System Frame Number of predetermined condition; Predetermined condition is: (SFN*10+SubFrame) %N=t, and wherein, SFN is a System Frame Number, and t is for measuring the time started at interval, and SubFrame is subframe index or subframe numbering.

Preferably, measurement clearance has the different time starteds in its different cycles.

By above-mentioned at least one technical scheme provided by the invention, to measure at interval be the cycle of gap by being provided with, can be so that UE read the system message that need read in gap, and then can carry out follow-up access operation etc. according to the information in the system message.

Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.

Description of drawings

Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:

Fig. 1 is according to MIB among the LTE of correlation technique and SIB1 scheduling schematic diagram;

Fig. 2 is according to MIB and SIB3 scheduling schematic diagram among the UMTS of correlation technique

Fig. 3 is that the current gap according to correlation technique can not read MIB among the LTE and the schematic diagram of SIB1;

Fig. 4 is the schematic diagram according to the gap of embodiment of the invention configuration;

Fig. 5 is according to the gap layoutprocedure of the embodiment of the invention and the schematic diagram of system message acquisition process;

Fig. 6 a and Fig. 6 b are the schematic diagrames of example 1 of the present invention;

Fig. 7 is the schematic diagram of example 2 of the present invention;

Fig. 8 is the schematic diagram of example 3 of the present invention;

Fig. 9 is the schematic diagram of example 4 of the present invention;

Figure 10 is the schematic diagram of example 5 of the present invention;

Figure 11 is the schematic diagram of example 6 of the present invention.

Embodiment

Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, if do not conflict, the feature among the embodiment of the invention and the embodiment can make up mutually.

At first, the notion that relates in the embodiment of the invention is introduced:

Measure (gap) cycle at interval: be meant that gap serves as to repeat at interval with the gap cycle;

Gap length: the length that is meant gap;

The time started of gap: the time that the initial moment that is meant gap postpones with respect to the initial border of the frame of Serving cell or subframe, the time started of gap can be the time started in the cycle of gap, also can not be.

Gap activation moments: be meant the position or the moment of activating gap.

Embodiment one

Because the configuration of present gap can not be satisfied the demand of receiving system message, for this reason, according to the embodiment of the invention, at first provides a kind of frame structure configuration method.In the method, measurement clearance (gap also can be called free time) is set in frame structure, wherein, the cycle of this measurement clearance is the P millisecond, the positive number of P for not divided exactly by the minimum repetition period of the system message that will read in measurement clearance, preferably, be natural number.Specifically as shown in Figure 4.

For the system message that UE will read in measurement clearance, can be main message blocks (MIB), also can be SIB (System information block), can also be MIB and SIB.The SIB here in the LTE system, can be SIB1, in the UMTS system, can be SIB3.Based on this, if system message is MIB, the positive number of P then for not divided exactly by the minimum repetition period of MIB; If system message is SIB, the positive number of P then for not divided exactly by the minimum repetition period of SIB; If system message is SIB and MIB, the positive number of P then for not divided exactly by the minimum repetition period of the minimum repetition period of SIB and MIB.

By setting to P, make gap in the cycle of the MIB of adjacent area and/or SIB, move, like this, through the gap cycle of some, UE can get access to MIB, the SIB that broadcasts at any time the adjacent area in the duration of gap.

The effect that gap moves also can realize by the different time started in each gap cycle is set, such as, the gap cycle is 20ms, and the time started in first cycle is 1ms, and the time started of second period is 2ms.

Preferably, in the frame structure configuration method that the embodiment of the invention provides, the duration of measurement clearance, that is, the length of gap as shown in Figure 4 is the N millisecond, N is greater than the transmission time interval of system message, particularly, if system message is MIB, then N is greater than the transmission time interval of MIB, if system message is SIB, then N is greater than the transmission time interval of SIB, if system message is MIB and SIB, then N is greater than the transmission time interval of MIB and the transmission time interval of SIB.Like this, in the N millisecond, can comprise at least one MIB and/or SIB, that is to say that in the N millisecond, UE can read the MIB or the SIB of an adjacent area at least.Obtain MIB and/or SIB according to reading the information that (comprise and read one or many) arrives here, can being correctly decoded, the number of times of the read operation that need carry out is by being correctly decoded out MIB and/or SIB decides.Preferably, can decide the value of N further according to time restriction to read operation.

Preferably, the present invention for example, can be continuous to the form of expression of the N millisecond here without limits, that is, the duration of gap is continuous N millisecond; Also can disperse, that is, N is the time period of a plurality of spaces.

Embodiment two

Described above is the frame structure layoutprocedure of system side.Carrying out the frame structure configuration, particularly, carrying out after the configuration of gap, preferably, with relevant configuration information notice UE, so that UE carries out the reception of system message or obtains operation according to the configuration information of gap.Particularly, for the acquisition process of system message, in general, can realize by following operation:

Pre-configured gap, and with the configuration information of gap notice UE, for example, can notify by sending configuration order.The layoutprocedure here can be carried out with reference to the method that embodiment one describes, and the configuration information here comprises above-mentioned cycle P, preferably, can also comprise the duration N of gap, the activation moments of gap etc.Like this, terminal after receiving configuration information, after gap is activated, can be in the duration of gap receiving system message.

For the activation moments of gap, can indicate in different ways, for example, a concrete appointment can be informed UE constantly, UE specifies at this and constantly gap is activated; Perhaps, also UE can be received current System Frame Number (the System Frame Number of configuration information or configuration order, abbreviate SFN as) next SFN as the activation moments of gap, intricately more, can also the activation moments of the SFN of certain condition as gap will be satisfied, for example, the activation moments of the SFN of following formula as gap will be satisfied: (SFN*10+SubFrame) %N=t, wherein, SFN is a System Frame Number, is the parameter of a circulation, for example, since 0, add 1 at every turn, revert to 0 after reaching maximum; T is the time started of gap.Need to prove, in various embodiments of the present invention and example, for time started of gap without limits, specifically can be, and as mentioned above, in the different cycles, the time started of gap can be different with reference to Fig. 4.

Below, will be that example further describes embodiments of the invention with the system message acquisition process in LTE and the UMTS system.

As shown in Figure 5, for the UE that is in connected state in the EUTRAN/UTRAN system, network side is given UE sending measuring task (A); UE carries out measurement, and the reporting measurement result, comprises the PCI (B) of adjacent area in this measurement result; Network side receives the measurement result that UE reports, finding has the CSG/Hybrid sub-district in the adjacent area, need read system message, so that obtain more information, such as CSG Ind, CSG ID, CGI etc., therefore need dispose gap (C) to UE, the concrete configuration process can be understood with reference to the above embodiments one and embodiment two, for example, network side disposes gap to UE, can pass through radio resource control signaling (Radio Resource Control is called for short RRC) notice UE, also can pass through media access signaling (Medium Access Control is called for short MAC) notice UE.

After UE receives the gap configuration order, can in gap, read the system message of these CSG/Hybrid adjacent areas,, then will read the result and report network side (D) if read.Network side receives that UE reports read the result after, the gap configuration (E) that notice UE cancellation is previous.

For UE, its get access to MIB and/these system messages of SIB after, can further therefrom get access to the sub-district relevant information, for example, can from MIB, obtain the CSG indication information, can obtain CGI and CSG ID from SIB, according to above-mentioned information, UE can select proper cell to insert.

Need to prove that flow gauge shown in Figure 5 only is exemplary, in the specific implementation, can adjust operation wherein neatly that for example, network side also can be according to the information of the UE of previous preservation, configuration gap gives UE in steps A; Again for example, alternatively,, also can be after step D for the configuration of cancellation gap in the step e, for network side, after its measurement result in receiving step D, be defaulted as the gap that UE has cancelled previous configuration automatically.

Based on the described scene of Fig. 5 and the above embodiments one and embodiment two, several examples have below been provided, so that the more thorough understanding to the present invention to be provided.In the following description, SFN is meant the SFN of Serving cell.

Example 1: in the LTE system, UE does not know the adjacent area temporal information, and reads once and just can correctly get access to MIB and SIB1.

In the LTE system, the minimum repetition period of MIB is 10ms, and the minimum repetition period of SIB1 is 20ms, like this, read MIB and SIB1 if desired in gap, cycle that then can gap is set to do not divided exactly by 10ms and 20ms, for example, the cycle P of gap can get 21ms.

Network side is as follows to the gap of UE configuration, that is, and and in configuration information that sends to UE or configuration order, carry following information: the cycle is 21ms, and the time started is 1ms, promptly, gap postpones 1ms from the frame boundaries of SFN20, and length is 3ms, and gap begins to activate from SFN=20.

Shown in Fig. 6 a, owing to reasons such as time delays, cause UE just to receive the gap configuration order at SFN=20, like this, gap just can not begin to activate according to being configured in SFN=20, therefore, the 1st gap cycle might have only part gap to come into force, perhaps invalid fully, that is, UE may just have free time to read the system message of adjacent area the 2nd gap cycle.

Pei Zhi gap is every through one-period in this example, and gap just moves 1ms relative to forward in 20ms.Find out that by Fig. 6 a each gap is moving with respect to the frame boundaries of adjacent area.

Because the cycle of MIB and a SIB1 is all less than 20ms, therefore, in 20ms, certainly have a MIB and a SIB1, and a fixed-site, a plurality of gap are done according to 20ms cut apart, shown in Fig. 6 b, as can be seen, the position of gap in each 20ms changing promptly mobile 1ms forward, the 2nd gap cycle, UE can obtain MIB, and the 7th gap cycle, UE can obtain SIB1.

Example 2: in the LTE system, UE knows the adjacent area parity frame, and reads once and just can correctly get access to MIB and SIB1.

Similar with example 1, in the LTE system, the minimum repetition period of MIB is 10ms, and the minimum repetition period of SIB1 is 20ms, and therefore, the cycle of gap is set to 21ms.

When the present frame of Serving cell was even frame, the present frame of adjacent area was an odd-numbered frame.Network side is as follows to the gap of UE configuration: the cycle is 21ms, and the time started is 10ms, and length is 3ms, and gap receives that from UE the next SFN of gap configuration order begins to activate.

As shown in Figure 7, UE receives the gap configuration order in the place of SFN=17, and UE begins to activate gap at SFN=18 so.As can be seen, the 1st gap cycle, UE can obtain MIB, and the 6th gap cycle, UE can obtain SIB1.

Example 3: UE knows the adjacent area temporal information in the LTE system, and reads once and just can correctly get access to MIB and SIB1.

Similar with example 1, in the LTE system, the minimum repetition period of MIB is 10ms, and the minimum repetition period of SIB1 is 20ms, and therefore, the cycle of gap is set to 22ms.

The time difference of UE reporting neighboring cell 1 (for example, can the step B in Fig. 5 report) is 8ms, and the time difference here is meant, is benchmark (being assumed to be X) with certain frame boundaries of Serving cell, thereafter the time difference of initial border of the frame of first adjacent area of Chu Xianing and X.

Network side is as follows according to the gap of above-mentioned time difference configuration: the cycle is 22ms, time started is 7ms, length is 4ms, the activationary time in each gap cycle is: the SFN that UE receives the gap configuration order backward, from meeting the subframe of following condition: (the %22=7 of SFN * 10+SubFrame), wherein, SFN is the SFN of the frame at the subframe place of beginning, and SubFrame is subframe index or subframe numbering.As shown in Figure 8, in this example, three of the fronts of qualified activation moments are as follows: (1) SFN=0, Subframe=7, (2) SFN=2, Subframe=9, (3) SFN=5, Subframe=1.Every through one-period, gap mobile 2ms forward just in 20ms, as seen from Figure 8, the 1st gap cycle, UE can get access to MIB, and the 3rd gap cycle, UE can get access to SIB1.

Example 4: in the UMTS system, UE does not know the adjacent area temporal information, and reads once and just can correctly get access to MIB and SIB3.

In the UMTS system, the minimum repetition period of MIB is 8 frames, and the minimum repetition period of SIB3 is 32 frames, and the cycle of gap is set to and can not be divided exactly by 8 frames and 32 frames, for example, can get 36 frames.

In this example, network side is as follows to the gap of UE configuration: the cycle is 36 frames, and the time started is 0, and length be (6 frames+1slot), and gap begins activation from SFN=33, as shown in Figure 9.As above Pei Zhi gap is every through one-period, and gap just moves 4 frames forward in 32 frames.As seen from Figure 9, the 1st gap cycle, UE can get access to MIB, and the 4th gap cycle, UE can get access to SIB3.

Example 5: in the LTE system, UE does not know the adjacent area temporal information, and need read twice and just can correctly get access to MIB and SIB1.

In the LTE system, the minimum repetition period of MIB is 10ms, and the minimum repetition period of SIB1 is 20ms, and in this example, the cycle of gap can be got 24ms.

Network side is as follows to the gap of UE configuration: the cycle is 24ms, time started is 10ms, length is 6ms, gap begins to activate from SFN=20, as shown in figure 10, as can be seen, the 1st gap cycle, UE can read MIB for the first time, the 4th gap cycle, UE can read identical MIB for the second time, the 5th gap cycle, UE can read SIB1 for the first time, the 10th gap cycle, UE can read identical SIB1 for the second time, like this, after above-mentioned read for four times, UE correctly gets access to MIB and SIB1.

Example 6: in the LTE system, UE does not know the adjacent area temporal information, and reads once and just can correctly get access to MIB and SIB1.

Similar with example 1, in the LTE system, the minimum repetition period of MIB is 10ms, and the minimum repetition period of SIB1 is 20ms, and therefore, the cycle of gap is set to 19ms.

Network side is as follows to the gap of UE configuration: the cycle is 19ms, and the time started is 14ms, and length is 3ms, and gap begins to activate from SFN=20.

So Pei Zhi gap is every through one-period, and gap just moves 1ms relative to backward in 20ms.As shown in figure 11, as can be seen, the 3rd gap cycle, UE can obtain MIB, and the 7th gap cycle, UE can obtain SIB1.From figure, MIB seemingly in the SIB1 back, launches according to time sequencing in fact, and MIB reads in the SIB1 front.

As mentioned above, by above-mentioned at least one technical scheme provided by the invention, the gap that is disposed is enough to allow the UE under the connected state can get access to the system message of the adjacent area of random time difference, and with respect to the UE method of read system message voluntarily, less to the influence of system business.

The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.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. a frame structure configuration method is characterized in that, comprising:

Measurement clearance is set in frame structure, and wherein, the cycle of described measurement clearance is the P millisecond, the positive number of P for not divided exactly by the minimum repetition period of the system message that will read in described measurement clearance.

2. method according to claim 1 is characterized in that described system message comprises main message blocks and System information block.

3. method according to claim 2 is characterized in that, the positive number of P for not divided exactly by the minimum repetition period of the minimum repetition period of described main message blocks and described System information block.

4. method according to claim 2 is characterized in that, the duration of described measurement clearance is the N millisecond, and N is greater than the greater in the transmission time interval of the transmission time interval of described main message blocks and described System information block.

5. method according to claim 1 is characterized in that, the duration of described measurement clearance is the N millisecond, and N is greater than the transmission time interval of described system message.

6. according to claim 4 or 5 described methods, it is characterized in that described duration is continuous N millisecond; Perhaps, described duration is the time period of a plurality of spaces.

7. method according to claim 1 is characterized in that, described system message is main message blocks or System information block.

8. a system message acquisition method is characterized in that, comprising:

Pre-configured measurement at interval, and with the configuration information notifying user equipment, wherein, described configuration information comprises the described cycle P at interval that measures, the positive number of P for not divided exactly by the minimum repetition period of the system message that will read in described measurement clearance;

When described measurement is activated at interval, measure in the duration at interval described, obtain described system message.

9. method according to claim 8 is characterized in that described system message comprises main message blocks and System information block, the positive number of P for not divided exactly by the minimum repetition period of the minimum repetition period of described main message blocks and described System information block.

10. method according to claim 9 is characterized in that, described configuration information also comprises the described duration N at interval that measures, and N is greater than the greater in the transmission time interval of the transmission time interval of described main message blocks and described System information block.

11. method according to claim 8 is characterized in that, described configuration information also comprises the described duration N at interval that measures, and N is greater than the transmission time interval of described system message.

12., it is characterized in that described duration is continuous N millisecond according to claim 10 or 11 described methods; Perhaps, described duration is the time period of a plurality of spaces.

13. each described method in 11 according to Claim 8, it is characterized in that, described configuration information also comprises the activation moments and/or the described measurement time started at interval of described measurement clearance, wherein, the described time started is described the measurement time that the initial moment at interval postpones with respect to the initial border of the frame of Serving cell or subframe.

14. method according to claim 13 is characterized in that, described activation moments is one of following: specify constantly, receive the current System Frame Number of described configuration information next System Frame Number, satisfy the System Frame Number of predetermined condition; Described predetermined condition is: (SFN*10+SubFrame) %N=t, and wherein, SFN is a System Frame Number, and t is described the measurement time started at interval, and SubFrame is subframe index or subframe numbering.

15. method according to claim 13 is characterized in that, described measurement clearance has the different time starteds in its different cycles.