CN103647578B - Mobile communication system and base station wherein - Google Patents
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- CN103647578B CN103647578B CN201310625566.9A CN201310625566A CN103647578B CN 103647578 B CN103647578 B CN 103647578B CN 201310625566 A CN201310625566 A CN 201310625566A CN 103647578 B CN103647578 B CN 103647578B
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Abstract
The present invention provides a kind of mobile communication system and base station wherein. this mobile communication system comprises base station and carries out the mobile station of radio communication in the community as the wireless-communication-capable area formed by described base station with described base station, and as from described base station to the downlink data at described mobile station, can by unicast data and broadcast/group broadcast data mixing send, it is identical that described base station makes the following two kinds start the difference of phase place, namely, a kind of is the beginning phase place of the intrinsic pilot signal in community sent in the subframe sending described unicast data and the difference of the beginning phase place of the intrinsic pilot signal in community sent in next subframe, another kind is the beginning phase place of the intrinsic pilot signal in community sent in the subframe sending described broadcast/group broadcast data and the difference of the beginning phase place of the intrinsic pilot signal in community sent in next subframe.
Description
The application is the applying date is on March 26th, 2007, and application number is 2007800522334, and denomination of invention is point case application of the application for a patent for invention of " pilot signal transmission method, the base station being suitable for the method, mobile station and cellular system ".
Technical field
The present invention has and relates to mobile communication system and base station wherein.
Background technology
In the cellular system, it is generally the cell search process carrying out searching for the community of connecting radio link by mobile station.
Cell searching uses the synchronizing channel (SynchronizationChannel, SCH) being included in the radio frames of downlink to carry out. Further, except synchronizing channel, also there is the situation (non-patent literature 1) of pilot tone channel and the broadcast channel (BroadcastChannel, BCH) using community intrinsic. One example of cell searching is described with reference to accompanying drawing.
Fig. 1 shows an example of the wireless frame structure sent from base station transmission apparatus.
As shown in Figure 1, this radio frames is configured to the multiplexing on the two-dimensional directional of time and frequency of various channel. In addition, in the example depicted in figure 1, radio frames has 10 subframe SF1-SF10 on time orientation, and each subframe SF is made up of gap when first half and later half two.
In addition, when each in gap, the resource uniquely determined by code element position (time) and sub-carrier positions (frequency) is called element of resource.
Herein, as time gap on the various channels of multiplexing, have the 1st synchronizing channel (P-SCH), the 2nd synchronizing channel (S-SCH) and pilot signal channel (P-CH).
1st synchronizing channel (P-SCH) has common pattern for whole community, and when the first half of the 1st subframe SF1 during the first half of gap #0 and the 6th subframe SF6 gap #10 end code element on carry out time-multiplexed.
2nd synchronizing channel (S-SCH) has fixing pattern for community ID group, and this community ID group divides into groups to obtain to the community ID being assigned to each community in advance. Further, the 2nd synchronizing channel (S-SCH) carries out time-multiplexed in the 2nd code element from the respective end of gap #10 during the first half of gap #0 during the first half of the 1st subframe SF1 and the 6th subframe SF6.
In addition, pilot signal channel (P-CH) has the intrinsic scrambler in the community of the information intrinsic as community, and when each gap (#0, #1, #2 ...) initial code element and the 5th code element on carry out time-multiplexed.
Corresponding one to one owing to being assigned to the intrinsic scrambler of community ID and community of each community, therefore mobile station is by determining the intrinsic scrambler in this community, it is possible to identification is from the community ID of community, device place.
Can adopt with the following method about the intrinsic scrambler in community: use the method that the pseudo-random number sequence that base station is intrinsic is multiplied by the sequence that the phase place rotation sequence orthogonal with between the sector in same base station obtains or the method adopting GeneralizedChirpLike sequence as pseudo-random number sequence.
Fig. 2 shows the cell search process step in mobile station. When receiving wireless format as shown in Figure 1 from base station, as the process in the 1st stage, the degree of correlation between the time signal of the 1st synchronizing channel (P-SCH) as known mode and copy is detected at mobile station, such as, will illustrate that the timing of maximum relevant value is as subframe timing (step S1).
As the 2nd stage, the timing detected out according to above-mentioned 1st stage, carries out high speed Fourier transform (FFT) and is transformed to frequency domain signal, and extracts the 2nd synchronizing channel (S-SCH) from this signal. Further, obtain the degree of correlation between the 2nd synchronizing channel (S-SCH) and candidate the 2nd synchronization channel sequence copy extracted, such as, will illustrate that candidate the 2nd synchronization channel sequence of maximum related value is as detection the 2nd synchronization channel sequence. According to detection the 2nd synchronization channel sequence identification community ID group (step S2).
Then, as the 3rd stage, carry out high speed Fourier transform (FFT) process according to the timing detected in the 1st stage, thus it is transformed to frequency domain signal, and from this signal, extract pilot signal channel (P-CH). And obtain the degree of correlation between the pilot signal channel (P-CH) of extraction and scrambler copy, the scrambler copy that candidate community ID in the community ID group that wherein this scrambler copy is with the 2nd stage that was included in is detected out is corresponding, such as, using the community ID corresponding to illustrating the candidate scrambler of maximum relevant value as detection community ID(step S3). Thus, it is determined that community, place.
; at 3GPP(3rdGenerationPartnershipProject) in; towards the stdn of portable phone communication of future generation, carry out the research of the standard of multi-medium broadcast/group broadcast service (MBMS:MultimediaBroadcast/Multicastservice).
Such as, MBMS data carries out time-multiplexed with subframe unit and unicast data. Non-patent literature 1 describes following method: the protection interval of the protection interval length using comparison unicast data to use; identical data are sent from multiple community with identical timing, identical frequency; and the synthesis of Received signal strength is carried out in side, mobile station, it is to increase receiving quality.
This is referred to as single-frequency network (SingleFrequencyNetwork). Now, in order to the identical MBMS data that demodulation sends from multiple community, the common pilot signal in identical community is sent in minizone.
Non-patent literature 2 describes following content: the control signal multiplexing of clean culture is being assigned to the subframe of MBMS data (below, it is called MBMS subframe) on, and in order to the demodulation of control signal and the CQI of this clean culture measures, the intrinsic pilot signal multiplexing in community in the minizone of clean culture with different mode is in MBMS subframe.
About the pilot signal structure of MBMS subframe, non-patent literature 3 also has record. According to this structure, in MBMS subframe, the only intrinsic pilot signal in the community of multiplex unicast in initial code element.
But, when carrying out time-multiplexed to MBMS subframe as described above, the subframe of different protection interval length is time-multiplexed. In the search of initial zone carried out when having connected the power supply at mobile station, owing to not having and receiving the relevant information of the protection interval length of subframe, therefore have problems in above-mentioned cell searching the 3rd stage.
Non-patent document 4 describes this problem in detail. As the way solving this problem, as described in non-patent literature 4, there is the method for the addition method at the protection interval managing to find MBMS subframe. Further, as described in non-patent literature 5, there is the method for the pilot signal in the subframe only using multiplexing synchronizing channel when search of initial zone.
Non-patent literature 1:3GPPTR25.814V7.0.0
Non-patent literature 2:3GPPTSG-RANWG1, R1-060372, " MultiplexingofUnicastPilotandControlChannelsinE-MBMSforE UTRADownlink ", TexasInstruments
Non-patent literature 3:3GPPTSG-RANWG1, R1-070383, " ReferenceSignalsforMixedCarrierMBMS ", Nokia
Non-patent literature 4:3GPPTSG-RANWG1, R1-060563, " ChannelDesignandLongCPSub-frameStructureforInitialCellse arch ", Fujitsu
Non-patent literature 5:3GPPTSG-RANWG1, R1-063304 " Three-StepCellSearchMethodforE-UTRA ", NTTDoCoMo, InstituteforInfocommResearch, MitsubishiElectric, Panasonic, ToshibaCorporation
Herein, in radio frames when multiplexing MBMS subframe, compared with the situation all carrying out with clean culture subframe distributing by radio frames, the element of resource number of the intrinsic pilot signal in the community in 1 radio frames becomes few (about this relation, it is contemplated that contrary situation. ).
Further, the element of resource number of the intrinsic pilot signal in community in 1 radio frames depends on the how many MBMS subframe of multiplexing. Such as, during using the cycle of the scrambler of intrinsic for community pilot signal as 1 radio frames, in each transmission timing of the intrinsic pilot signal in community, the phase place of scrambler changes according to multiplexing MBMS subframe.
Example 1(case1 when the whole subframe illustrated as an example in Fig. 3 in radio frames is assigned with clean culture) and example 2(case2 when subframe #1 and #4 is assigned with MBMS).
In Fig. 3, what " phase place of the intrinsic scrambler in community " hurdle represented is, using intrinsic for community scrambler as community intrinsic pilot signal, element of resource configuration according to the low frequency side being assigned to the intrinsic pilot signal in community, is assigned to the phase place of the cell scrambling of the element of resource of each lowest frequency side sent in timing of the intrinsic pilot signal in community.
Further, the element of resource number code element with the intrinsic pilot signal in community being distributed to community intrinsic pilot signal accordingly is set to Np.
In example 1, owing to whole subframes is assigned with clean culture, so the phase shift of the intrinsic scrambler in community can not be there is.
Relative to this, in example 2, owing to subframe #1 and #4 is assigned with MBMS, so there is the phase shift of the intrinsic scrambler in community.
As shown in above-mentioned non-patent literature 5, when the intrinsic pilot signal in community of the subframe #0 and #5 that use multiplexing synchronizing channel obtains the degree of correlation, if there is the phase shift of the intrinsic scrambler in community, then owing to the phase place of the intrinsic pilot signal in community of subframe #5 is unknown, therefore blind Detecting etc. be can only carry out, the increase for the treatment of capacity, the deterioration of detection probability caused.
Summary of the invention
Therefore, it is an object of the invention to the degree of correlation detection easily realized in mobile station. Further, its object is to, between (son) frame, the variable quantity making the transmission of pilot signal start phase place becomes specified amount.
And; pilot signal transmission method, the base station being suitable for the method, mobile station and cellular system are provided; so that in radio frames when multiplexing unicast data and MBMS subframe; each timing of intrinsic pilot symbols in community; relevant treatment can be carried out when the phase shift not causing the intrinsic scrambler in community all the time; thus without the need to making the structure large-scale or complicated at mobile station, it is possible to realize suitable cell search process.
In order to realize above-mentioned purpose, it is a feature of the present invention that, it may also be useful to transmission processing method in following mobile communication system and base station. namely, the intrinsic pilot signal transmission method in community in a kind of mobile communication system, this mobile communication system comprises base station and carries out the mobile station of radio communication in the community as the wireless-communication-capable area formed by described base station with described base station, as from described base station to the downlink data at described mobile station, can by unicast data and broadcast/group broadcast data mixing send, described base station makes following two kinds of differences starting phase place identical, namely, a kind of is the difference carrying out the beginning phase place of the intrinsic pilot signal in community and the beginning phase place of the intrinsic pilot signal in community carrying out sending in next subframe sent in the subframe sending described unicast data, another kind is the difference carrying out the beginning phase place of the intrinsic pilot signal in community and the beginning phase place of the intrinsic pilot signal in community carrying out sending in next subframe sent in the subframe sending described broadcast/group broadcast data.
In addition, base station according to the present invention forms wireless-communication-capable area, and can communicate in unicast data and the mobile communication system of broadcast/group broadcast data mixing send with mobile station, described base station comprises phase control division, this phase control division is used for controlling, so that following two kinds of differences starting phase place are identical, namely, a kind of is the difference carrying out the beginning phase place of the intrinsic pilot signal in community and the beginning phase place of the intrinsic pilot signal in community carrying out sending in next subframe sent in the subframe sending described unicast data, another kind is the difference carrying out the beginning phase place of the intrinsic pilot signal in community and the beginning phase place of the intrinsic pilot signal in community carrying out sending in next subframe sent in the subframe sending described broadcast/group broadcast data.
According to the present invention with above-mentioned feature, as downlink data, in the system that unicast data, MBMS data hybrid concurrency are sent, even if at the number according to the MBMS subframe being assigned in radio frames, and the intrinsic pilot signal in the community being assigned in radio frames element of resource number change time, can also each timing of intrinsic pilot symbols in community, carry out relevant treatment when the phase shift not causing the intrinsic scrambler in community all the time.
, it is possible to realize suitable cell search process, therefore the structure large-scale or complicated at mobile station can not be made, it is possible to characteristic when realizing summary and the cell search process at mobile station is improved, therefore very useful in moving communicating field.
Accompanying drawing explanation
Fig. 1 represents an example of the wireless frame structure sent from base station transmission apparatus.
Fig. 2 is the figure of the cell search process step represented in mobile station.
Whole subframes in radio frames are assigned with the situation of clean culture and subframe is assigned with the figure that the situation of MBMS represents as an example by Fig. 3.
Fig. 4 is the block diagram of the major portion structure representing the base station transmission apparatus according to the present invention.
Fig. 5 represents to comprise MSMS subframe, the figure of an example with the wireless frame structure of the two dimension performance of time, frequency.
Fig. 6 represents to be controlled to according to phase control division, in the code element of the intrinsic pilot signal in each community, makes the figure of the example that the phase place of the intrinsic scrambler in community is equal.
Fig. 7 is the block diagram of the major portion structure at the mobile station representing in ofdm communication system.
Fig. 8 is the figure that embodiment 2 is described.
Fig. 9 is the figure of the phase place of the intrinsic pilot signal in community represented in each frequency band of embodiment 2.
Figure 10 is the figure of the configuration example representing the radio frames according to embodiment 3.
Figure 11 is the figure of the configuration example representing other radio frames according to embodiment 3.
Description of symbols:
1: data selecting section
2: intrinsic pilot signal channel sequence storage portion, community
3: common pilot signal channel sequence storage portion, community
4: pilot signal selection portion
5: phase control division
6: the 1 synchronizing channel storage portions
7: the 2 synchronizing channel storage portions
8: channel multiplexing portion
9: serial/parallel conversion process portion
10:IFFT process portion
11: protection insertion section, interval
12: wireless processing section
13: transmitting antenna
20: receiving antenna
21: wireless processing section
22: protection interval removal unit
23:FFT process portion
200: the 1 stage processing portions
210: the 2 stage processing portions
220: the 3 stage processing portions
Embodiment
Hereinafter, with reference to accompanying drawing, embodiments of the present invention are described.
[embodiment 1]
Fig. 4 is the block diagram of the major portion structure representing the base station transmission apparatus according to the present invention.
Base station transmission apparatus shown in this Fig. 4 is configured to have: data selecting section 1, intrinsic pilot signal channel sequence storage portion, community 2, common pilot signal sequence storage portion, community 3, pilot signal selection portion 4, phase control division 5, the 1st synchronizing channel storage portion 7 of synchronizing channel storage portion the 6, the 2nd, channel multiplexing portion 8, serial/parallel conversion process portion 9, IFFT process portion 10, protection interval (GI) insertion section 11, wireless processing section 12, transmitting antenna 13.
Data selecting section 1, according to scheduling, is selected unicast data A or MBMS data B, and is sent the data of 1 subframe part to channel multiplexing portion 8. In data selecting section 1, when have selected MBMS data B, send the instruction that phase control division 5 is carried out phase control.
Pilot signal selection portion 4 is according to the kind of the transmission data of this subframe, and the system of selection of changing cells intrinsic pilot signal signal sequence AA or the common pilot signal channel sequence A B in community, reads pilot signal from each self-corresponding storage portion 2 or 3. When data kind is MBMS, from intrinsic pilot signal channel sequence storage portion, community 2 and common pilot signal channel sequence storage portion, community 3, read the intrinsic pilot signal N in community of 1 MBMS subframe part respectivelys_mAnd the common pilot signal N in community of 1 MBMS subframe partcommon. When data kind is unicast data, read the intrinsic pilot signal N in community of 1 clean culture subframe parts_u��
Now, the phase place amount read-out by current phase advance in the intrinsic pilot signal channel in community sequence storage portion 2 and common pilot signal channel sequence storage portion, community 3.
Phase control division 5, when there being phase control to indicate, makes the current phase advance in intrinsic pilot signal channel sequence storage portion, community 2 (corresponding to Ns_uPhase place amount)-(corresponding to Ns_mPhase place amount).
Namely, carry out the phase control making the difference of following two kind beginning phase place identical, namely, being the difference carrying out the beginning phase place of the intrinsic pilot signal in community and the beginning phase place of the intrinsic pilot signal in community carrying out sending in next subframe sent in the subframe sending unicast data, another kind sends to carry out the beginning phase place of the intrinsic pilot signal in community that sends and the difference of the beginning phase place of the intrinsic pilot signal in community carrying out sending in next one subframe in the subframe of above-mentioned broadcast/group broadcast data.
In other words, in pilot signal (pilot signal that such as community is intrinsic) sending method in the mobile communication system with base station and mobile station, the transmission of above-mentioned pilot signal sent start phase place with send terminate phase place difference can during the 1st unit sends, during (such as sending the subframe of unicast data) and the transmission of the 2nd unit, (such as sending the subframe of MBMS data) is different time, above-mentioned base station above-mentioned 1st unit is sent during in the transmission of above-mentioned pilot signal start phase place and above-mentioned 2nd unit transmission during in the transmission of above-mentioned pilot signal start the difference of phase place, be controlled to start phase place than above-mentioned transmission and the difference of regulation that above-mentioned difference that above-mentioned transmission terminates between phase place is big (in example before, carry out making phase advance (the phase place amount corresponding to Ns_u)-(corresponding to Ns_mPhase place amount) adjustment), wherein, above-mentioned movement stands in the community as the wireless-communication-capable area formed by above-mentioned base station, carries out radio communication with this base station.
Herein, channel multiplexing portion 8 for correspondence to mobile station UE(UserEquipment) each channel signal (modulating data) of various channels (data channel, pilot signal channel, synchronizing channel etc.) of sending carries out multiplexing, serial/parallel conversion process portion below 9(, sometimes referred to as S/P conversion process portion) for carrying out serial/parallel conversion to by the signal (Nc modulating data) of above-mentioned channel multiplexing portion 8 multiplexing and configure (mapping) respectively to each carrier wave.
Fig. 5 shows an example of wireless frame structure that comprise MBMS subframe, that show with the two dimension of time, frequency. As embodiment, 1 radio frames (RF) is made up of 10 subframes (SF), and 1 subframe is made up of gap (SL) when 2.
When clean culture subframe, when 1, gap is made up of 7 code elements (SB), when MBMS subframe 100, owing to portable protective gaps is long, so being made up of 6 code elements.
The initial code element a and the 5th code element b of the intrinsic pilot signal AA in community gap when clean culture subframe each carries out multiplexing with 6 sub-frame interval. Wherein, the frequency direction configuration of the 5th code element b, relative to the frequency allocation of initial code element a, becomes the configuration of 3 subcarrier displacements.
On the other hand, when MBMS subframe 100, the intrinsic pilot signal AA in community only when first half gap initial code element c on carry out multiplexing with 6 sub-frame interval.
The 2nd code element d and the 5th code element e of the common pilot signal AB in community gap when MBMS subframe 100 each configures with 2 subcarrier spacings. Wherein, the frequency direction configuration of the 5th code element configures relative to the frequency direction of the 2nd code element, becomes the configuration of 1 subcarrier displacement.
Wherein, for the intrinsic scrambler in community sent as the intrinsic pilot signal channel AA in community, being controlled to by phase control division 5, the beginning phase differential of the pilot signal that the community between each subframe is intrinsic becomes specified amount. Fig. 6 has illustrated its example.
In Fig. 6, the 1st subframe SF(#1 of radio frames) and the 3rd subframe (#3) be assigned with clean culture, the 2nd subframe (#2) is assigned with below MBMS(, and X subframe is designated as subframe (#X)).
Further, the element of resource number distributing to the intrinsic pilot signal channel in community accordingly with the intrinsic pilot symbols in each community is Np. In the example shown in Fig. 6, owing to the community intrinsic pilot symbols number corresponding with 1 clean culture subframe is 4, therefore Ns_u=4Np, owing to the intrinsic pilot symbols number in the community corresponding with 1MBMS subframe is 1, therefore Ns_u=Np.
For the element of resource being assigned to the intrinsic pilot signal in community, from the intrinsic scrambler in allocating cell, low frequency side, wherein, the intrinsic pilot signal in this community is the intrinsic pilot signal in community of the initial intrinsic pilot symbols in community sent in radio frames.
In the subframe (#2) being assigned to MBMS, only when first half gap initial code element on the intrinsic pilot signal in multiplexing community. Therefore, by phase control division 5, make the phase advance 3Np being assigned to the intrinsic scrambler in community of the lowest frequency side of the intrinsic pilot signal in next community, become P(8Np).
Same below, when MBMS subframe multiplexing, the phase advance of the intrinsic scrambler in community. Thus, unrelated with the presence or absence of the MBMS subframe in radio frames, it is resolved that the phase place of the intrinsic pilot symbols in initial community of each subframe.
Returning to Fig. 4 to be described, the modulating data being configured to each subcarrier is carried out IFFT process and be transformed to time-domain signal by Nc the unit of IFFT process portion 10 corresponding to Nc subcarrier.
Protection insertion section, interval 11 is to this time-domain signal insertion protection interval.
Wireless processing section 12 carries out the wireless process of the necessity of the wireless signal etc. that the signal frequency converting (upwards converting) after being inserted at protection interval is regulation, and this wireless signal is sent to travel path by transmitting antenna 13.
Then, structure and the action at the mobile station corresponding with the base station of above-mentioned explanation are described.
Fig. 7 is the block diagram of the structure of the major portion at the mobile station representing in ofdm communication system. Mobile station shown in this Fig. 7 is configured to such as comprise: receiving antenna portion 20, wireless processing section 21, the 1st stage processing portion 200, the 2nd stage processing portion 210, the 3rd stage processing portion 220, protection interval removal unit 22 and FFT process portion 23.
1st stage processing portion 200 has: the 1st synchronizing channel copy signal storage portion 201, correlation processing unit 202, time average portion 203 and subframe timing detection portion 204. 2nd stage processing portion 210 has: the 2nd synchronizing channel extraction unit 211, correlation processing unit 212, candidate the 2nd synchronous code storage portion 213, time average portion 214, the 2nd synchronous code radio frames timing detection portion 215. Further, the 3rd stage processing portion 230 has: community intrinsic pilot signal channel extraction unit 231, intrinsic scrambler storage portion, candidate community 232, phase control division 233, correlation processing unit 234, time average portion 235, intrinsic scrambler detection portion, community 236.
Hereinafter, the reception process at the mobile station according to said structure is described.
Herein, receiving antenna portion 20 receives the wireless signal from above-mentioned base station BS, and the wireless signal received by receiving antenna portion 20 is implemented the wireless reception process of necessity of downward conversion process etc. by wireless processing section 21.
As the 1st stage processing of the cell searching undertaken by the 1st stage processing portion 200, according to the degree of correlation between the Received signal strength from wireless processing section 21 and the copy signal of the 1st synchronizing channel (P-SCH) as known mode, synchronous detection subframe timing (Fig. 2: step S1).
Therefore, in the 1st stage processing portion 200,1st synchronizing channel copy signal storage portion 201 prestores the copy signal of above-mentioned 1st synchronizing channel, the degree of correlation that correlation processing unit 202 obtains above-mentioned Received signal strength and is stored between the copy signal in the 1st synchronizing channel copy signal storage portion 201.
The associated processing outcomes of this correlation processing unit 202 carries out time average by time average portion 203, and is input to subframe timing detection portion 204. Subframe timing detection portion 204 is according to the subframe timing of the associated processing outcomes detection Received signal strength of correlation processing unit 202. Such as, it is possible to the timing illustrating maximum relation degree is detected out as subframe timing.
2nd stage processing portion 210 carries out carrying out high speed Fourier transform (FFT) process based on the subframe timing detected by the 1st stage processing portion 200 described above, using the process (Fig. 2: step S2) in the 2nd stage as cell searching, thus carry out the extraction of the 2nd synchronizing channel and the detection of the 2nd synchronous code and frame timing.
Therefore, protection interval removal unit 22, based on the subframe timing detected by the subframe timing detection portion 204 in the 1st stage processing portion 200, removes the protection interval being inserted into Received signal strength, and wherein this Received signal strength is the Received signal strength of the wireless process in received process portion 21.
The Received signal strength of time domain, for the effective code element after the removal of protection interval, with specific time interval (being at least effective Baud Length time), i.e. FFT window to implement FFT process, thus is transformed to the signal of frequency domain by FFT process portion 23.
2nd synchronizing channel extraction unit 210 process from FFT according to above-mentioned FFT process portion 23 after the frequency domain signal extraction multiplexing element of resource of the 2nd synchronizing channel. On the other hand, be previously stored with in the relevant treatment of correlation processing unit 212 in the 2nd synchronous code storage portion 213 use candidate the 2nd synchronous code. Correlation processing unit 212 obtains the degree of correlation between the 2nd synchronizing channel extracted by above-mentioned 2nd synchronizing channel extraction unit 211 and candidate the 2nd synchronous code being stored in above-mentioned candidate the 2nd synchronous code storage portion 213.
The output of correlation processing unit 212 is averaged by time average portion 214, and the 2nd synchronous code and radio frames timing detect based on the associated processing outcomes of above-mentioned correlation processing unit 212 in the 2nd synchronous code radio frames timing detection portion 215. Such as, it is possible to will illustrate that candidate the 2nd synchronous code of maximum relation degree is as detection the 2nd synchronous code. Thus identification cell set.
3rd stage processing portion 220 is for carrying out intrinsic pilot signal detection process (Fig. 2: step S3) in community, and the Received signal strength after FFT process is transfused to the intrinsic pilot signal channel extraction unit 221 in community. Community intrinsic pilot signal channel extraction unit 221 carries out the element of resource of the intrinsic pilot signal in community of the frequency domain signal extraction multiplexing after FFT process from by above-mentioned FFT process portion 23.
The copy of the intrinsic scrambler in candidate community that intrinsic scrambler storage portion, candidate community 223 is stored in advance in the relevant treatment of correlation processing unit 224 to use.
The degree of correlation that correlation processing unit 224 obtains the intrinsic pilot signal in community extracted by above-mentioned community intrinsic pilot signal channel extraction unit 221 and is stored between the intrinsic scrambler copy in candidate community in intrinsic scrambler storage portion, above-mentioned candidate community 222.
The output of correlation processing unit 224 carries out time average by time average portion 225, in intrinsic scrambler detection portion, community 226, according to the intrinsic scrambler in associated processing outcomes detection community in correlation processing unit 224. Such as, it is possible to will illustrate that the intrinsic scrambler in candidate community of maximum relation degree is as the intrinsic scrambler in detection community. Thus, the community at place, mobile station is determined as cell search results.
[embodiment 2]
Embodiment 2 is example embodiment 1 being adapted in any one system sending downgoing signal that can use multiple frequency band. The configuration example of base station is substantially identical with the structure shown in Fig. 4 and Fig. 7 illustrated before respectively with the structure at mobile station.
Fig. 8 is the figure that embodiment 2 is described, example V when example IV when example III when example II when example I when being have 1200 subcarriers as frequency band, have 600 subcarrier, have 300 subcarrier, have 144 subcarrier, have 72 subcarrier.
When there is any one in the frequency band I��V of these multiple subcarriers as feature, at center, send synchronous channel SCH with the bandwidth W equal with the minimum frequency band of 72 subcarriers.
Fig. 9 illustrates the phase place of the intrinsic pilot signal in community in each frequency band of embodiment 2. Even if in multiplexing when MBMS subframe, the phase place that community intrinsic pilot signal each sends timing also as shown in Figure 9 by phase control division 5(with reference to Fig. 4) adjust.
Further, being which is unrelated with frequency band, on the band domain W of 72 carrier waves in center, the phase place of the intrinsic pilot signal in community is identical all the time.
Herein, in search of initial zone, owing to not knowing which the frequency band of Received signal strength is, the signal therefore only receiving the bandwidth W equal with minimum frequency band carries out cell searching. In wireless processing section 21, it may also be useful to analog filter etc. receive the signal with minimum frequency band equal bandwidth. This can also use digital filter to carry out after wireless processing section 21. Or, it is also possible to carry out both.
The cell searching described in detail in embodiment 1 the 1st stage S1 and the 2nd stage S2, detection subframe timing, community ID group and radio frames timing. As mentioned above, no matter which frequency band is synchronous channel SCH be, at the center of frequency band, owing to sending with the bandwidth W equal with minimum frequency band, even if therefore not knowing which frequency band is, it is possible to use synchronous channel SCH performs cell searching the 1st stage S1 and the 2nd stage S2.
Then, cell searching the 3rd stage S3 described in detail is carried out in embodiment 1, the intrinsic scrambler in detection community. Now, each phase place sent in timing of the intrinsic pilot signal in community does not rely on which frequency band is, and do not rely on whether MBMS subframe is re-used, even if therefore moving station not know which frequency band is, it is also possible to the detection intrinsic scrambler in community and the phase shift of the intrinsic pilot signal in community produced by MBMS subframe multiplexing can not be caused.
[embodiment 3]
Embodiment 3 is also the example being suitable for premised on embodiment 1, and base station transmission apparatus is also identical with the structure illustrated in embodiment 1 with the structure at mobile station.
Embodiment 3 is the situation that the intrinsic pilot signal in the community in MBMS subframe only carries out sending in a part of band domain limited.
This is the structure of the situation etc. that the control signal going for clean culture in MBMS subframe only sends in a part of band domain limited.
Figure 10 illustrates the structure example of the radio frames according to embodiment 3. That is, in the example shown in Figure 10, illustrating subframe #0, #2 is clean culture subframe, and subframe #1 is the example of MBMS subframe. The only multiplexing intrinsic pilot signal in community on 4 subcarriers at the initial center of subframe in MBMS subframe.
By phase control division 5, in the subframe #1 of the 19th phase advance 4 of subframe #0, using the phase place of intrinsic for initial community pilot signal as 23. And then, in the subframe #2 of the 26th phase advance 14 of subframe #1, the phase place of intrinsic for initial community pilot signal is set to 40. Thus, it is possible in subframe #0, #1, #2, the Phase Continuation of the intrinsic pilot signal in community is made.
Further, Figure 11 is the example of other the radio frames according to embodiment 3. The phase place of the intrinsic pilot signal in initial community of subframe #1 is 20, with the Phase Continuation of the intrinsic pilot signal in the community of subframe #0. Now, due to from subframe #1 continuously to #2, therefore phase control becomes the phase advance 17 of the intrinsic pilot signal in community.
(attached note 1)
The intrinsic pilot signal transmission method in community in a kind of mobile communication system, this mobile communication system comprises base station and carries out the mobile station of radio communication in the community as the wireless-communication-capable area formed by described base station with described base station, as the downlink data being sent to described mobile station from described base station, unicast data and broadcast/group broadcast data can be sent by hybrid concurrency
The intrinsic pilot signal transmission method in this community is characterised in that,
Described base station makes following two kinds of differences starting phase place identical, namely, being the difference carrying out the beginning phase place of the intrinsic pilot signal in community and the beginning phase place of the intrinsic pilot signal in community carrying out sending in next subframe sent in the subframe sending described unicast data, another kind carries out the beginning phase place of the intrinsic pilot signal in community that sends and the difference of the beginning phase place of the intrinsic pilot signal in community carrying out sending in next subframe in the subframe sending described broadcast/group broadcast data.
(attached note 2)
The intrinsic pilot signal transmission method in community according to attached note 1, it is characterised in that,
Make following two kinds of transmission starting positions identical, namely, be send in the next subframe of the subframe of described unicast data the intrinsic pilot signal in community that carries out sending, a transmission starting position in this next one subframe, another kind be the intrinsic pilot signal in community that carries out sending in the next subframe of the subframe of the described broadcast/group broadcast data of transmission, transmission starting position in this next one subframe.
(attached note 3)
The intrinsic pilot signal transmission method in community in mobile communication system, this mobile communication system comprises base station and carries out the mobile station of radio communication in the community as the wireless-communication-capable area formed by described base station with described base station,
The intrinsic pilot signal transmission method in this community is characterised in that,
When transmission in the described pilot signal sent starts different during phase place likely sends with the 2nd unit from the difference sending end phase place during the 1st unit sends,
Described base station described 1st unit is sent during in the transmission of the described pilot signal transmission that starts the described pilot signal in during phase place sends with the described 2nd unit difference that starts phase place be controlled to, send beginning phase place and described transmission terminates the difference of the big regulation of the described difference between phase place than described.
(attached note 4)
A base station in mobile communication system, this base station forms wireless-communication-capable area, and can send in unicast data and the mobile communication system of broadcast/group broadcast data and communicate with mobile station by hybrid concurrency,
This base station is characterised in that, described base station comprises phase control division, this phase control division is used for controlling, so that following two kinds of differences starting phase place are identical, namely, a kind of is the difference carrying out the beginning phase place of the intrinsic pilot signal in community and the beginning phase place of the intrinsic pilot signal in community carrying out sending in next subframe sent in the subframe sending described unicast data, another kind is the difference carrying out the beginning phase place of the intrinsic pilot signal in community and the beginning phase place of the intrinsic pilot signal in community carrying out sending in next subframe sent in the subframe sending described broadcast/group broadcast data.
(attached note 5)
Mobile station in a kind of mobile communication system, this moves and stands in and unicast data can be sent to communicate with the base station forming wireless-communication-capable area with in the mobile communication system of broadcast/group broadcast data by hybrid concurrency,
This moves station and is characterised in that, this moves station and comprises:
Reception portion, it receives the intrinsic pilot signal in community that the difference starting phase place in a base station by following two kinds is controlled to identical specified amount, namely, being the difference carrying out the beginning phase place of the intrinsic pilot signal in community and the beginning phase place of the intrinsic pilot signal in community carrying out sending in next subframe sent in the subframe sending described unicast data, another kind carries out the beginning phase place of the intrinsic pilot signal in community that sends and the difference of the beginning phase place of the intrinsic pilot signal in community carrying out sending in next subframe in the subframe sending described broadcast/group broadcast data; And
Phase control division, its phase place calculated accordingly according to the position with the reception subframe in radio frames, the phase place of the intrinsic pilot signal in community used in the calculation of correlation between the intrinsic pilot signal of control and reception community.
(attached note 6)
A kind of mobile communication system, this mobile communication system comprises base station and carries out the mobile station of radio communication in the community as the wireless-communication-capable area formed by described base station with described base station, as the downlink data being sent to described mobile station from described base station, unicast data and broadcast/group broadcast data can be sent by hybrid concurrency
This mobile communication system is characterised in that,
Described base station comprises phase control division, this phase control division is used for controlling, so that following two kinds of differences starting phase place are identical, namely, a kind of is the difference carrying out the beginning phase place of the intrinsic pilot signal in community and the beginning phase place of the intrinsic pilot signal in community carrying out sending in next subframe sent in the subframe sending described unicast data, another kind is the difference carrying out the beginning phase place of the intrinsic pilot signal in community and the beginning phase place of the intrinsic pilot signal in community carrying out sending in next subframe sent in the subframe sending described broadcast/group broadcast data
Described mobile station comprises phase control division, the phase place that this phase control division calculates accordingly according to the position with the reception subframe in radio frames, the phase place of the intrinsic pilot signal in community used in the calculation of correlation between the intrinsic pilot signal of control and reception community.
(attached note 7)
Mobile communication system according to attached note 6, it is characterised in that,
Described subframe uses the different sub-carrier number of any one the frequency band multiplexing in multiple frequency band, described phase place adjustment part in described base station carries out phase control, so that corresponding to the frequency band of the synchronizing channel in frequency band the narrowest in described multiple frequency band, consistent with described multiple frequency band center separately.
(attached note 8)
Mobile communication system according to attached note 6, it is characterised in that,
The intrinsic pilot signal in community being assigned with in the subframe of described broadcast/group broadcast data only sends in a part of frequency band limited, and described phase place adjustment part makes the phase advance of the intrinsic pilot signal in community in next subframe from the amount of a part of frequency band phase shift of described restriction.
Claims (2)
1. the base station in mobile communication system, this base station forms wireless-communication-capable area, and this wireless-communication-capable area can send the region carrying out in unicast data and the mobile communication system of broadcast/group broadcast data communicating with mobile station by hybrid concurrency,
This base station is characterised in that, described base station comprises phase control division, this phase control division controls, make the difference of following two kind beginning phase place identical, namely, a kind of is the difference in the beginning phase place with the beginning phase place of the intrinsic pilot signal in community carrying out sending in next subframe that have sent in the subframe of described unicast data the intrinsic pilot signal in the community sent, another kind is the difference in the beginning phase place with the beginning phase place of the intrinsic pilot signal in community carrying out sending in next subframe that have sent in the subframe of described broadcast/group broadcast data the intrinsic pilot signal in community sent.
2. a mobile communication system, it mobile station comprising base station and carrying out radio communication in the community as the wireless-communication-capable area formed by described base station with described base station, as the downlink data being sent to described mobile station from described base station, it is possible to send unicast data and broadcast/group broadcast data
This mobile communication system is characterised in that,
Described base station comprises phase control division, this phase control division controls, make the difference of following two kind beginning phase place identical, namely, a kind of is the difference in the beginning phase place with the beginning phase place of the intrinsic pilot signal in community carrying out sending in next subframe that have sent in the subframe of described unicast data the intrinsic pilot signal in the community sent, another kind is the difference in the beginning phase place with the beginning phase place of the intrinsic pilot signal in community carrying out sending in next subframe that have sent in the subframe of described broadcast/group broadcast data the intrinsic pilot signal in community sent
Described mobile station comprises reception portion, and this reception portion receives the intrinsic pilot signal in described community of the control that the described phase control division being subject to described base station carries out.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1337069A2 (en) * | 2002-02-14 | 2003-08-20 | NTT DoCoMo, Inc. | Synchronisation in a spread-spectrum multicarrier system |
| WO2006102744A1 (en) * | 2005-03-30 | 2006-10-05 | Nortel Networks Limited | Systems and methods for ofdm channelization |
| CN1879321A (en) * | 2003-10-24 | 2006-12-13 | 韩国电子通信研究院 | Downlink signal configuring method and device in mobile communication system, and synchronization and cell searching method and device using the same |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1337069A2 (en) * | 2002-02-14 | 2003-08-20 | NTT DoCoMo, Inc. | Synchronisation in a spread-spectrum multicarrier system |
| CN1879321A (en) * | 2003-10-24 | 2006-12-13 | 韩国电子通信研究院 | Downlink signal configuring method and device in mobile communication system, and synchronization and cell searching method and device using the same |
| WO2006102744A1 (en) * | 2005-03-30 | 2006-10-05 | Nortel Networks Limited | Systems and methods for ofdm channelization |
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