CN101238665A - Base station device and mobile platform device - Google Patents
Base station device and mobile platform device Download PDFInfo
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- CN101238665A CN101238665A CNA2005800513124A CN200580051312A CN101238665A CN 101238665 A CN101238665 A CN 101238665A CN A2005800513124 A CNA2005800513124 A CN A2005800513124A CN 200580051312 A CN200580051312 A CN 200580051312A CN 101238665 A CN101238665 A CN 101238665A
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Abstract
There are provided a base station device transmitting a frame capable of performing cell search without being affected by arrangement of a pilot channel and a mobile station device performing cell search by using the frame. In the base station device (100), a frame formation unit (120) forms a frame by arranging a P-SCH sequence used for synchronization of a frame timing on some symbols of multi-carrier symbols at a predetermined position from the frame head in the frequency direction and arranging an S-SCH sequence corresponding to a base station scrambling code so that it is not overlapped on some of the multi-carrier symbols at a predetermined position from the frame head with the same symbol as the frame synchronization sequence. The frame is received by the mobile station device (200) and the S-SCH is demodulated. Thus, it is possible to directly identify the base station scrambling code without using a pilot channel.
Description
Technical field
The present invention relates to base station apparatus and mobile station apparatus, relate in particular to the base station apparatus and the mobile station apparatus that carry out multi-carrier communication.
Background technology
At the 3GPP of standardization body, be purpose with the further improvement of present third generation mobile system, carry out the research of 3GPP RAN LTE (Long Term Evolution).As the descending wireless transmission mode that adopts at it, think that the OFDM mode has advantage.
In addition, in non-patent literature 1 and 2, structure as the pilot channel in the OFDM mode, advised disperseing mapping (Scattered mapping), described scattering is in TTI (Transmission TimeInterval), be configured in Common Pilot Channel and dedicated pilot (channel) on the frequency direction dispersedly and time orientation on technology (referring to Fig. 1).
On the other hand, in non-patent literature 3, as SCH (Synchronization Channel: structure synchronizing channel), advised the configuration (referring to Fig. 2) of multiplexing two different SCH on frequency direction in an OFDM code element.In the document, the ratio that the SCH sequence is configured is OFDM code element of configuration in a frame, as the SCH sequence, prepared to have the Primary SCH (P-SCH) of the shared pattern in all sub-districts and had because of different pattern in sub-district and the Secondary SCH (S-SCH) corresponding with code character (code group).
In addition, in multi-carrier communications systems, in order to discern the sub-district that base station apparatus covers, the scrambled code different (scrambling code) to each cell allocation, mobile station apparatus needs to carry out Cell searching under the situation along with moving and during switching cell (handover) or when carrying out intermittently receiving etc., just carry out determining of scrambled code for the identification sub-district.
As the method for the Cell searching that has used above-mentioned P-SCH and S-SCH, following suggestion is arranged also in non-patent literature 2.
In the phase I of Cell searching, travelling carriage extracts P-SCH from received signal, and ask with P-SCH duplicate (replica) between frequency direction on relevant.Then, travelling carriage asks relevant to all code elements, and detects the timing that can access maximum related value.Based on the relation of the position in the frame of this code element (known), detect frame regularly.
In second stage, S-SCH is carried out demodulation (decoding), and determine code character based on its result.
In the phase III, based on frame regularly, from received signal, extract CPICH, and ask and belong to relevant between the corresponding CPICH duplicate of all scrambled codes of the determined code character of second stage.Then, determine the scrambled code corresponding with maximum correlation value.Finish Cell searching like this.
Non-patent literature 1:3GPP TR 25.913 v2.0.0 " Requirements for Evolved UTRAand UTRAN "
Non-patent literature 2:3GPP R1-050589, NTT DoCoMo " Pilot Channel andScrambling Code in Evolved UTRA Downlink " (June 2005)
Non-patent literature 3:3GPP R1-050590, NTT DoCoMo " Physical Channels andMultiplexing in Evolved UTRA Downlink " (June 2005)
Summary of the invention
The problem that invention will solve
Yet, be correlated with to determine under the situation of scrambled code the definite configuration of handling that could depend on pilot channel (mapping) of scrambled code as described above by using the pilot channel that is disperseed mapping to ask.That is to say that the decline in TTI changes when rapid,, use the possibility of this related operation failure that is disperseed the pilot channel that shines upon higher because of the influence of decay.
The object of the present invention is to provide the base station apparatus and the mobile station apparatus that carry out multi-carrier communication, the influence ground that this base station apparatus sends the configuration that can not be subjected to pilot channel carries out the frame of Cell searching, and this mobile station apparatus carries out Cell searching based on this frame.
The scheme of dealing with problems
Base station apparatus of the present invention is the base station apparatus that carries out multi-carrier communication, the structure that this base station apparatus adopts comprises: frame forms the unit, form frame, in described frame, to be used for frame synchronous frame synchronization sequence regularly, on frequency direction, be configured on a part of code element the multicarrier code element of position of the regulation that begins from the beginning of frame, and, scrambled code identification signal that will be corresponding with the base station scrambled code that is assigned to this base station apparatus, on frequency direction, be configured in the part of described multicarrier code element, so that it is not overlapping on identical code element with described frame synchronization sequence; And transmitting element, send described frame.
Other scheme of base station apparatus of the present invention is the base station apparatus that carries out multi-carrier communication, the structure that this base station apparatus adopts comprises: frame forms the unit, form frame, in described frame, in the subcarrier that is predetermined, to be used for frame synchronous frame synchronization sequence regularly, on time-axis direction, be configured in the position of the regulation that begins from the beginning of frame, and, scrambled code identification signal that will be corresponding with the base station scrambled code that is assigned to this base station apparatus, be configured on the time-axis direction on the subcarrier that has disposed described frame synchronization sequence, so that it is not overlapping on identical code element with described frame synchronization sequence; And transmitting element, send described frame.
Mobile station apparatus of the present invention is for using the mobile station apparatus that carries out Cell searching from the frame of base station apparatus transmission, the structure that this mobile station apparatus adopts comprises: receiving element, received frame, in described frame, be used for frame synchronous frame synchronization sequence regularly, on frequency direction, be configured on a part of code element the subcarrier symbol of position of the regulation that begins from the beginning of frame, and, the scrambled code identification signal corresponding with the base station scrambled code of described base station apparatus, on frequency direction, be configured in the part of described subcarrier symbol, so that it is not overlapping on identical code element with described frame synchronization sequence; Correlation unit, the pattern that is configured based on described frame synchronization sequence multiplies each other each subcarrier symbol and the frame synchronization sequence duplicate of the described frame that receives, asks relevant; Frame is detecting unit regularly, based on the correlation that obtains by described correlation unit, detects frame regularly; Demodulating unit based on by the regularly detected frame timing of detecting unit of described frame, extracts described scrambled code identification signal and it is carried out demodulation from the described frame that receives; And determining unit, determine the corresponding described base station scrambled code of described scrambled code identification signal with institute's demodulation.
Other scheme of mobile station apparatus of the present invention is for using the mobile station apparatus that carries out Cell searching from the frame of base station apparatus transmission, the structure that this mobile station apparatus adopts comprises: receiving element, received frame, in described frame, in the subcarrier that is predetermined, be used for frame synchronous frame synchronization sequence regularly, on time-axis direction, be configured the position of the regulation that begins from the beginning of frame, and, the scrambled code identification signal corresponding with the base station scrambled code that is assigned to described base station apparatus, be configured on the time-axis direction on the subcarrier that has disposed described frame synchronization sequence, so that it is not overlapping on identical code element with described frame synchronization sequence; Correlation unit, the pattern based on described frame synchronization sequence is configured multiplies each other subcarrier signal and the frame synchronization sequence duplicate that has disposed described frame synchronization sequence, asks relevant; Frame is detecting unit regularly, based on the correlation that obtains by described correlation unit, detects frame regularly; Demodulating unit based on by the regularly detected frame timing of detecting unit of described frame, extracts described scrambled code identification signal and it is carried out demodulation from the described frame that receives; And determining unit, determine the corresponding described base station scrambled code of described scrambled code identification signal with institute's demodulation.
The invention effect
According to the present invention, the base station apparatus and the mobile station apparatus that carry out multi-carrier communication can be provided, the influence ground that this base station apparatus sends the configuration that can not be subjected to pilot channel carries out the frame of Cell searching, and this mobile station apparatus carries out Cell searching based on this frame.
Description of drawings
Fig. 1 is the figure of pilot channel structure that is used for illustrating the frame of ofdm communication mode in the past;
Fig. 2 is the figure of synchronous channel structure that is used for illustrating the frame of ofdm communication mode in the past;
Fig. 3 is the block diagram of structure of the base station apparatus of expression embodiments of the present invention 1;
Fig. 4 is the figure of structure of the formed frame of base station apparatus of presentation graphs 3;
Fig. 5 is the figure of structure that is used for the S-SCH sequence that frame comprised of key diagram 4;
Fig. 6 is the table of combination of the S-SCH sequence pattern of presentation graphs 5;
Fig. 7 is the block diagram of structure of the mobile station apparatus of expression execution mode 1;
Fig. 8 is other the table of form of expression S-SCH sequence pattern;
Fig. 9 is the block diagram of structure of the base station apparatus of expression execution mode 2;
Figure 10 is the figure of structure of the formed frame of base station apparatus of presentation graphs 9;
Figure 11 is the block diagram of structure of the mobile station apparatus of expression execution mode 2; And
Figure 12 is the block diagram of structure of the base station apparatus of expression execution mode 3.
Embodiment
Below, the execution mode that present invention will be described in detail with reference to the accompanying.
In addition, in execution mode, to the additional identical label of identical structure division, so because its explanation repeats omission.
(execution mode 1)
As shown in Figure 3, the base station apparatus 100 of execution mode 1 comprises that error correction coding unit 105, modulating unit 110, CPICH generation unit 115, frame form unit 120, IFFT unit 140, GI insertion unit 145 and RF transmitting element 150.And frame forms unit 120 and comprises that frame constitutes unit 125, scrambling processing unit 130 and SCH and inserts unit 135.
105 inputs of error correction coding unit send data, and the fixed error correction coding of the professional etiquette of going forward side by side is handled.Signal after the modulating unit 110 input error correction codings, the modulation treatment that the professional etiquette of going forward side by side is fixed.CPICH generation unit 115 generates the CPICH code element.
Frame constitutes the signal after unit 125 input CPICH code elements and the modulation, considers to insert the position in the frame that unit 135 is inserted into the SCH sequence and it is configured on the frequency axis and the position that is predetermined on the time shaft at SCH.Constitute the frame that constitutes like this in the unit 125 at frame and be imported into scrambling processing unit 130.
Scrambling processing unit 130 will constitute frame that unit 125 forms at frame and multiply by the base station scrambled code intrinsic to base station apparatus 100.In addition, this base station scrambled code is used to discern the sub-district (or sector) that base station apparatus 100 is covered.
SCH inserts the 135 pairs of frames that multiply each other by scrambling processing unit 130 and base station scrambled code in unit, inserts two different SCH sequences (P-SCH sequence and S-SCH sequence).This P-SCH sequence (main (Primary) SCH sequence) is used to frame synchronization at the receiving terminal of frame.In addition, with regard to S-SCH sequence (secondary (secondary) SCH sequence), the identifying information of this sequence expression base station scrambled code itself.In addition, about the structure of S-SCH sequence, will narrate in the back.
In the present embodiment, to the OFDM code element that is predetermined, the specific symbol timing of promptly all subcarriers carries out two different SCH sequences (P-SCH sequence and S-SCH sequence) time-multiplexed, and the SCH sequence after time-multiplexed is inserted into frame after scrambling is handled.
The structure that forms the frame that unit 120 as above forms by frame as shown in Figure 4.That is to say that to the OFDM code element that is predetermined in the frame, two different SCH sequences (P-SCH sequence and S-SCH sequence) are configured on the frequency axis direction.Especially in Fig. 4, " the configuration pattern " in the OFDM code element of P-SCH sequence and S-SCH sequence is configured in the pattern of the subcarrier of OFDM code element alternately with each other for P-SCH sequence and S-SCH sequence.
Turn back to Fig. 3,140 pairs of IFFT unit insert by SCH that the frame (transmission signal) that has inserted the SCH sequence in unit 135 carries out fast fourier inverse transformation (IFFT) and after from the frequency domain transform to the time domain, output to GI and insert unit 145.
GI inserts the output signal of 145 pairs of IFFT unit 140, unit and inserts protection (GI) at interval.Each OFDM code element is inserted this protection at interval.
The signal that inserts after protecting is at interval handled at the RF that RF transmitting element 150 carries out up-conversion and A/D conversion etc., and is sent out by antenna.
The structure of S-SCH sequence is described here.As shown in Figure 5, the S-SCH sequence is divided into two pieces, and each piece has been configured S-SCH pattern 1 and S-SCH pattern 2 respectively.And a piece is that S-SCH pattern 1 is corresponding with the code character that the base station scrambled code is divided into groups, and S-SCH pattern 2 is corresponding with the base station scrambled code.That is to say, in the S-SCH sequence, as the identifying information itself that has all still comprised the base station scrambled code.
For example, as shown in Figure 6, employed scrambled code has 512 in whole system, and it is divided under 16 code characters situation of (each code character has been distributed 16 scrambled codes), for S-SCH pattern 1 needs 4 bits at least, and be that S-SCH pattern 2 needs 5 bits at least.
As shown in Figure 7, the mobile station apparatus 200 of execution mode 1 has RF receiving element 205, symbol timing detecting unit 210, fft processing unit 215, P-SCH correlation value calculation unit 220, frame regularly detecting unit 225, S-SCH demodulating unit 230, scrambled code determining unit 235, scramble process unit 240, demodulating unit 245 and error correction decoding unit 250.
Symbol timing detecting unit 210 is based on the protection that is comprised in received signal correlation properties at interval, and detected symbol is (phase I of Cell searching) regularly.
Received signal after P-SCH correlation value calculation unit 220 input FFT handle, for all OFDM code elements that are equivalent to a frame, carry out the related operation on the frequency direction between the duplicate of received signal and P-SCH sequence about the subcarrier of multiplexing P-SCH sequence.In addition, in the structure of above-mentioned frame, just be configured in the structure of a part of OFDM code element in the P-SCH sequence, related operation on the frequency direction also only gets final product the subcarrier of a part, therefore compare with to all OFDM code element configuration P-SCH sequence the time, can reduce operand.
In addition, behind frame timing detecting unit 225 received frame timing informations, P-SCH correlation value calculation unit 220 is based on this frame timing information, be configured the code element of P-SCH sequence and the related operation on the frequency direction between the P-SCH sequence duplicate, and correlated results has been outputed to S-SCH demodulating unit 230.
Frame is detecting unit 225 correlation that will calculate by P-SCH correlation value calculation unit 220 regularly, each OFDM code element is carried out power add operation (power addition), and regularly detect the timing that can obtain maximum addition correlation (maximum addition correlation) as frame.Then, frame timing detecting unit 225 outputs to P-SCH computing unit 220 and S-SCH demodulating unit 230 with frame timing information.
Received signal after S-SCH demodulating unit 230 input FFT handle is extracted the code element that is configured the S-SCH sequence based on the frame timing information from frame timing detecting unit 225, and it is carried out demodulation.By in the stage of having extracted the code element that is configured the S-SCH sequence, the complex conjugate of this code element that extracts with the above-mentioned correlated results that obtains from P-SCH correlation value calculation unit 220 multiplied each other, carry out this demodulation process.If it is represent this processing, as follows with formula.
C
S＝X
P×r
S *
Wherein, X
PBe the correlated results between received signal and the P-SCH duplicate, r
SBe the S-SCH that extracts the received signal after FFT handles, C
SDemodulation result (S-SCH pattern) (r for S-SCH
S *Expression r
SComplex conjugate).
Thus, can use the above-mentioned correlated results of relevant P-SCH sequence to carry out the transmission path compensation of relevant S-SCH sequence, thereby can be reduced in the probability that produces mistake in the demodulation of S-SCH sequence, described P-SCH sequence is subjected to the influence (phase place rotation that is caused by decline and amplitude change etc.) in the propagation path between base station apparatus 100 and mobile station apparatus 200, and described S-SCH sequence is subjected to the influence in propagation path too.
Then, S-SCH demodulating unit 230 for example outputs to scrambled code determining unit 235 with the S-SCH pattern after the demodulation as shown in Figure 6.
Scrambled code determining unit 235 references table as shown in Figure 6, and, determine corresponding scrambled code based on S-SCH pattern from S-SCH demodulating unit 230.
Signal behind the demodulating unit 245 input descramblings carries out suitable demodulation process and the signal after the demodulation is outputed to error correction decoding unit 250.
Signal after the 250 input demodulation of error correction decoding unit carries out suitable error correction decoding and handles also as the signal behind the reception data output error correction decoding.
In addition, in the above description, OFDM code element that is configured the P-SCH sequence and the mutually the same situation of code element that is configured the S-SCH sequence are illustrated, but are not limited to this, the OFDM code element that is disposed of two sequences also can be different.In a word, so long as the P-SCH sequence is configured in the part of OFDM code element of the position of the regulation that begins from the beginning of frame on frequency direction, thereby can determine that frame regularly based on the correlation on the frequency direction between this P-SCH sequence and the P-SCH sequence duplicate at receiving terminal, and then with the S-SCH sequence on a subcarrier part, that be not configured P-SCH of the OFDM code element of the position that is configured in the regulation that begins from the beginning of frame on the frequency direction or symbol timing, thereby can determine that by this S-SCH sequence is carried out demodulation scrambled code gets final product.But, under the OFDM code element that is configured the P-SCH sequence situation mutually the same with being configured the OFDM code element of S-SCH sequence, when carrying out above-mentioned propagation path compensation, use is carried out the propagation path compensation of S-SCH sequence about the correlated results of the P-SCH sequence that comprises in identical OFDM code element.Owing to thinking the influence that is subjected to identical substantially propagation path in identical timing, so, can carry out the propagation path compensation of S-SCH sequence more expeditiously by using correlated results about the P-SCH sequence that in identical OFDM code element, comprises.
In addition, for the structure of as shown in Figure 6 S-SCH sequence, can consider various structures.For example, also can be as shown in Figure 8, do not introduce the notion of code character and directly make S-SCH sequence pattern and scrambled code identifying information (for example, identifier) corresponding.In a word, so long as S-SCH sequence pattern itself comprises the scrambled code identifying information gets final product.
In addition, in the above description the situation of carrying out ofdm communication between base station apparatus 100 and mobile station apparatus 200 is illustrated, but is not limited to this, so long as multi-carrier communication gets final product.At this moment, above-mentioned " OFDM code element " read to be " multicarrier code element ".
As mentioned above, according to execution mode 1, in the base station apparatus 100 that carries out multi-carrier communication, be provided with: frame forms unit 120, form frame, in described frame, to be used for frame synchronous frame synchronization sequence (P-SCH sequence) regularly, on frequency direction, be configured on a part of code element the multicarrier code element of position of the regulation that begins from the beginning of frame, and, scrambled code identification signal that will be corresponding with the base station scrambled code that is assigned to this base station apparatus (S-SCH sequence) is configured in the part of multicarrier code element of the position of the regulation that begins from the beginning of frame, so that it is not overlapping on identical code element with described frame synchronization sequence on frequency direction; And RF transmitting element 150, send described frame.
Thus, because in the receiving terminal (mobile station apparatus 200) of frame,, can not use pilot channel and directly determine the base station scrambled code, so can realize not being subjected to the Cell searching of influence of the configuration of pilot channel by the scrambled code identification signal is carried out demodulation.
In addition, in base station apparatus 100, be provided with: frame forms unit 120, form frame, in described frame, to be used for frame synchronous frame synchronization sequence (P-SCH sequence) regularly, on frequency direction, be configured on a part of code element the multicarrier code element of position of the regulation that begins from the beginning of frame, and, scrambled code identification signal that will be corresponding (S-SCH sequence) with the base station scrambled code that is assigned to this base station apparatus, on frequency direction, be configured in the part of described multicarrier code element, so that it is not overlapping on identical code element with described frame synchronization sequence; And RF transmitting element 150, send described frame.That is to say, frame form unit 120 with described frame synchronization sequence with in described scrambled code identification signal is configured in identical multicarrier code element.
Thus, because in the receiving terminal (mobile station apparatus 200) of frame,, can not use pilot channel and directly determine the base station scrambled code, so can realize not being subjected to the Cell searching of influence of the configuration of pilot channel by the scrambled code identification signal is carried out demodulation.
And above-mentioned scrambled code identification signal comprises: the corresponding code group identification signal of code character that forms with the base station scrambled code is divided into groups, and the scrambled code identification signal that comprises in each code character.
Thus, because in the receiving terminal (mobile station apparatus 200) of frame, by the scrambled code identification signal is carried out demodulation, can not use pilot channel and directly determine the base station scrambled code, so can realize not being subjected to the Cell searching of influence of the configuration of pilot channel, and can carry out predetermined process that each code character is carried out.
In addition, according to execution mode 1, using the frame that sends from base station apparatus 100 to carry out the mobile station apparatus 200 of Cell searching, be provided with: RF receiving element 205, received frame, in described frame, be used for frame synchronous frame synchronization sequence (P-SCH sequence) regularly, on frequency direction, be configured on a part of code element the multicarrier code element of position of the regulation that begins from the beginning of frame, and, the scrambled code identification signal corresponding (S-SCH sequence) with the base station scrambled code of described base station apparatus, on frequency direction, be configured in the part of multicarrier code element of the position of the regulation that begins from the beginning of frame, so that it is not overlapping on identical code element with described frame synchronization sequence; P-SCH correlation value calculation unit 220, the pattern that is configured based on described frame synchronization sequence multiplies each other each multicarrier code element and the frame synchronization sequence duplicate of the described frame that receives, asks relevant; Frame is detecting unit 225 regularly, based on the correlation that obtains by P-SCH correlation value calculation unit 220, detects frame regularly; S-SCH demodulating unit 230 based on by regularly detecting unit 225 detected frames timings of frame, extracts described scrambled code identification signal and it is carried out demodulation from the described frame that receives; And scrambled code determining unit 235, determine the corresponding described base station scrambled code of described scrambled code identification signal with institute's demodulation.
Thus, because by the scrambled code identification signal is carried out demodulation, can not use pilot channel and directly determine the base station scrambled code, so can realize not being subjected to the Cell searching of influence of the configuration of pilot channel.
In addition, using the frame that sends from base station apparatus 100 to carry out the mobile station apparatus 200 of Cell searching, be provided with: RF receiving element 205, received frame, in described frame, be used for frame synchronous frame synchronization sequence (P-SCH sequence) regularly, on frequency direction, be configured on a part of code element the multicarrier code element of position of the regulation that begins from the beginning of frame, and, the scrambled code identification signal corresponding (S-SCH sequence) with the base station scrambled code of described base station apparatus, on frequency direction, be configured in the part of described multicarrier code element of the position of the regulation that begins from the beginning of frame, so that it is not overlapping on identical code element with described frame synchronization sequence; P-SCH correlation value calculation unit 220, the pattern that is configured based on described frame synchronization sequence multiplies each other each multicarrier code element and the frame synchronization sequence duplicate of the described frame that receives, asks relevant; Frame is detecting unit 225 regularly, based on the correlation that obtains by P-SCH correlation value calculation unit 220, detects frame regularly; S-SCH demodulating unit 230 based on by regularly detecting unit 225 detected frames timings of frame, extracts described scrambled code identification signal and it is carried out demodulation from the described frame that receives; And scrambled code determining unit 235, determine the corresponding described base station scrambled code of described scrambled code identification signal with institute's demodulation.That is to say that RF receiving element 205 is received in the frame that has disposed described frame synchronization sequence and described scrambled code identification signal in the identical multicarrier code element.
Thus, because by the scrambled code identification signal is carried out demodulation, can not use pilot channel and directly determine the base station scrambled code, so can realize not being subjected to the Cell searching of influence of the configuration of pilot channel.
In addition, above-mentioned P-SCH correlation value calculation unit 220 is based on passing through regularly detecting unit 225 detected frames timings of frame, the frame synchronization sequence and the output of the correlated results between the described frame synchronization sequence duplicate of the described frame that receives will be configured in, and S-SCH demodulating unit 230 carries out propagation path compensation and it is carried out demodulation the described scrambled code identification signal that extracts based on the correlated results of 220 outputs from P-SCH correlation value calculation unit.
Thus, can use the above-mentioned correlated results of relevant frame synchronization sequence (P-SCH sequence) to carry out the transmission path compensation of relevant scrambled code identification signal (S-SCH sequence), thereby can be reduced in the probability that produces mistake in the demodulation of scrambled code identification signal (S-SCH sequence), described frame synchronization sequence (P-SCH sequence) is subjected to the influence (phase place rotation that is caused by decline and amplitude change etc.) in the propagation path between base station apparatus 100 and mobile station apparatus 200, and described scrambled code identification signal (S-SCH sequence) is subjected to the influence in propagation path too.And then, in the subcarrier symbol that is configured frame synchronization sequence (P-SCH sequence) be configured under the mutually the same situation of the subcarrier symbol of scrambled code identification signal (S-SCH sequence), when carrying out above-mentioned propagation path compensation, use is carried out the propagation path compensation of scrambled code identification signal (S-SCH sequence) about the correlated results of the frame synchronization sequence (P-SCH sequence) that comprises in identical subcarrier symbol.Owing to thinking the influence that is subjected to identical substantially propagation path in identical timing, so, can carry out the propagation path compensation of scrambled code identification signal (S-SCH sequence) more expeditiously by using correlated results about the frame synchronization sequence (P-SCH sequence) that in identical OFDM code element, comprises.
And, in the communication system that constitutes by above-mentioned base station apparatus 100 and mobile station apparatus 200, also can access and above-mentioned same effect.
(execution mode 2)
In execution mode 1, used the OFDM code element is disposed P-SCH sequence and S-SCH sequence on the frequency axis direction frame.Relative therewith, in execution mode 2, use just P-SCH sequence and S-SCH sequence at the frame that is configured on the time-axis direction on the subcarrier that is predetermined.
As shown in Figure 9, the base station apparatus 300 of execution mode 2 has frame formation unit 310.This frame forms unit 310 and has frame formation unit 320 and SCH insertion unit 330.
The signal after CPICH code elements and the modulation is imported in frame formation unit 320, considers to be configured on the frequency axis and the position that is predetermined on the time shaft by the position in the frame of SCH insertion unit 330 insertion SCH sequences and with it.Constitute unit 320 such frames that constitute by frame and be imported into scrambling processing unit 130.
SCH inserts the 330 pairs of frames that multiply each other by scrambling processing unit 130 and base station scrambled code in unit and inserts two different SCH sequences (P-SCH sequence and S-SCH sequence).
In the present embodiment,, on the frequency axis direction that promptly is predetermined, the SCH sequence is carried out channeling, and the SCH sequence behind the channeling is inserted into frame after scrambling is handled a plurality of subcarriers that are predetermined.
The structure that forms the frame that unit 310 as above forms by frame as shown in figure 10.That is to say, adopted following structure: two different P-SCH sequences and S-SCH sequence are configured on a plurality of subcarriers that are predetermined, so that they are not overlapping on identical code element.Especially in Figure 10, " configuration pattern " in the subcarrier of P-SCH sequence and S-SCH sequence is the pattern that two sequences are configured in the code element on each subcarrier alternately with each other.
As shown in figure 11, the mobile station apparatus 400 of execution mode 2 has P-SCH correlation value calculation unit 410, frame regularly detecting unit 420 and S-SCH demodulating unit 430.
Received signal after P-SCH correlation value calculation unit 410 input FFT handle is carried out the related operation on the time orientation between the duplicate of received signal and P-SCH sequence for the multiplexing subcarrier of P-SCH sequence (below, be sometimes referred to as " SCH subcarrier ").Especially in the present embodiment, because the P-SCH sequence is configured on the code element of identical subcarrier alternately with each other with the S-SCH sequence, so when asking relevant between received signal and the P-SCH sequence duplicate, relevant on a code element seeking time direction of principal axis of 410 pairs of P-SCH correlation value calculation unit.That is to say that P-SCH correlation value calculation unit 410 is based on the configuration pattern on the subcarrier of P-SCH sequence, ask relevant on the time-axis direction between received signal and the P-SCH sequence.
In addition, behind frame timing detecting unit 420 received frame timing informations, P-SCH correlation value calculation unit 410 is based on this frame timing information, carry out in each P-SCH subcarrier, being configured the code element of P-SCH sequence and the related operation on the time-axis direction between the P-SCH sequence duplicate, and will output to S-SCH demodulating unit 430 at the correlated results in each P-SCH subcarrier.
Frame regularly detecting unit 420 carries out the power add operation of the correlation corresponding with a plurality of P-SCH subcarriers, and regularly detects the timing that can obtain maximum addition correlation (maximum addition correlation) as frame.Then, frame timing detecting unit 420 outputs to P-SCH computing unit 410 and S-SCH demodulating unit 430 with frame timing information.
Received signal after S-SCH demodulating unit 430 input FFT handle is extracted in the code element that is configured the S-SCH sequence in the S-SCH subcarrier based on the frame timing information from frame timing detecting unit 420, and it is carried out demodulation.By extracting the stage that in the S-SCH subcarrier, is configured the code element of S-SCH sequence, the code element of this each S-SCH subcarrier that extracts and complex conjugate 410 that obtain from P-SCH correlation value calculation unit, above-mentioned correlated results corresponding each S-SCH subcarrier are multiplied each other, carry out this demodulation process.The demodulation result of each S-SCH subcarrier that so obtains is carried out on average, and for example the S-SCH pattern after the demodulation as shown in Figure 6 is output to scrambled code determining unit 235.
In addition, in the above description, subcarrier that is configured the P-SCH sequence and the mutually the same situation of subcarrier that is configured the S-SCH sequence are illustrated, but the present invention is not limited to this, the subcarrier that is disposed of two sequences also can be different.In a word, so long as in the subcarrier that is predetermined, the P-SCH sequence is configured in the position of the regulation that begins from the beginning of frame on time-axis direction, thereby can be based on the correlation on the time-axis direction between this P-SCH sequence and the P-SCH sequence duplicate at receiving terminal, determine that frame regularly, and then the S-SCH sequence is configured on the code element that is not configured the P-SCH sequence on the subcarrier that is not configured the P-SCH sequence or in the identical subcarrier, thereby, this S-SCH sequence transfers to determine that scrambled code gets final product by being separated on time-axis direction.But, under the subcarrier that is configured the P-SCH sequence situation mutually the same with being configured the subcarrier of S-SCH sequence, when carrying out above-mentioned propagation path compensation, use is carried out the propagation path compensation of S-SCH sequence about being configured in the correlated results of the P-SCH sequence on the identical subcarrier.Owing to thinking the influence that on identical subcarrier, is subjected to identical substantially propagation path, so, can carry out the propagation path compensation of S-SCH sequence more expeditiously by using about being configured in the correlated results of the P-SCH sequence on the identical subcarrier.
In addition, with execution mode 1 similarly, the structure that also can be used as the S-SCH sequence adopts structure as shown in Figure 8, in a word, gets final product so long as S-SCH sequence pattern itself comprises the scrambled code identifying information.
In addition, in the above description, with execution mode 1 similarly, the situation of carrying out ofdm communication between base station apparatus 300 and mobile station apparatus 400 is illustrated, but be not limited to this, so long as multi-carrier communication gets final product.At this moment, above-mentioned " OFDM code element " read to be " multicarrier code element ".
As mentioned above, according to execution mode 2, in the base station apparatus 300 that carries out multi-carrier communication, be provided with: frame forms unit 310, form frame, in described frame, in the subcarrier that is predetermined, to be used for frame synchronous frame synchronization sequence (P-SCH sequence) regularly, on time-axis direction, be configured in the position of the regulation that begins from the beginning of frame, and, scrambled code identification signal that will be corresponding with the base station scrambled code that is assigned to this base station apparatus, on time-axis direction, be configured in the position of the regulation that begins from the beginning of frame, so that it is not overlapping on identical code element with described frame synchronization sequence; And RF transmitting element 150, send described frame.
Thus, because in the receiving terminal (mobile station apparatus 400) of frame,, can not use pilot channel and directly determine the base station scrambled code, so can realize not being subjected to the Cell searching of influence of the configuration of pilot channel by the scrambled code identification signal is carried out demodulation.
In addition, in the base station apparatus 300 that carries out multi-carrier communication, be provided with: frame forms unit 310, form frame, in described frame, in the subcarrier that is predetermined, to be used for frame synchronous frame synchronization sequence (P-SCH sequence) regularly, on time-axis direction, be configured in the position of the regulation that begins from the beginning of frame, and, scrambled code identification signal that will be corresponding with the base station scrambled code that is assigned to this base station apparatus, be configured on the time-axis direction disposed shown on the subcarrier of frame synchronization sequence, so that it is not overlapping on identical code element with described frame synchronization sequence; And RF transmitting element 150, send described frame.That is to say that frame forms unit 310 described frame synchronization sequence is configured on the identical subcarrier with described scrambled code identification signal.
Thus, because in the receiving terminal (mobile station apparatus 400) of frame,, can not use pilot channel and directly determine the base station scrambled code, so can realize not being subjected to the Cell searching of influence of the configuration of pilot channel by the scrambled code identification signal is carried out demodulation.
And above-mentioned scrambled code identification signal comprises: the corresponding code group identification signal of code character that forms with described base station scrambled code is divided into groups, and the scrambled code identification signal that comprises in each code character.
Thus, because in the receiving terminal (mobile station apparatus 400) of frame, by the scrambled code identification signal is carried out demodulation, can not use pilot channel and directly determine the base station scrambled code, so can realize not being subjected to the Cell searching of influence of the configuration of pilot channel, and can carry out predetermined process that each code character is carried out.
In addition, according to execution mode 2, using the frame that sends from base station apparatus 300 to carry out the mobile station apparatus 400 of Cell searching, be provided with: RF receiving element 205, received frame, in described frame, in the subcarrier that is predetermined, be used for frame synchronous frame synchronization sequence (P-SCH sequence) regularly, on time-axis direction, be configured in the position of the regulation that begins from the beginning of frame, and, the scrambled code identification signal corresponding (S-SCH sequence) with the base station scrambled code of distributing to base station apparatus 300, on time-axis direction, be configured in the position of the regulation that begins from the beginning of frame, so that it is not overlapping on identical code element with described frame synchronization sequence; P-SCH correlation value calculation unit 410, the pattern based on described frame synchronization sequence is configured multiplies each other subcarrier signal and the frame synchronization sequence duplicate that is configured described frame synchronization sequence, asks relevant; Frame is detecting unit 420 regularly, based on the correlation that obtains by P-SCH correlation value calculation unit 410, detects frame regularly; S-SCH demodulating unit 430 based on by regularly detecting unit 420 detected frames timings of frame, extracts described scrambled code identification signal and it is carried out demodulation from the described frame that receives; And scrambled code determining unit 235, determine the corresponding described base station scrambled code of described scrambled code identification signal with institute's demodulation.
Thus, because by the scrambled code identification signal is carried out demodulation, can not use pilot channel and directly determine the base station scrambled code, so can realize not being subjected to the Cell searching of influence of the configuration of pilot channel.
In addition, using the frame that sends from base station apparatus 300 to carry out the mobile station apparatus 400 of Cell searching, be provided with: RF receiving element 205, received frame, in described frame, in the subcarrier that is predetermined, be used for frame synchronous frame synchronization sequence (P-SCH sequence) regularly, on time-axis direction, be configured in the position of the regulation that begins from the beginning of frame, and, the scrambled code identification signal corresponding with the base station scrambled code of distributing to base station apparatus 300 (S-SCH sequence) is being configured on the time-axis direction on the subcarrier that has disposed described frame synchronization sequence, so that it is not overlapping on identical code element with described frame synchronization sequence; P-SCH correlation value calculation unit 410, the pattern based on described frame synchronization sequence is configured multiplies each other subcarrier signal and the frame synchronization sequence duplicate that is configured described frame synchronization sequence, asks relevant; Frame is detecting unit 420 regularly, based on the correlation that obtains by P-SCH correlation value calculation unit 410, detects frame regularly; S-SCH demodulating unit 430 based on by regularly detecting unit 420 detected frames timings of frame, extracts described scrambled code identification signal and it is carried out demodulation from the described frame that receives; And scrambled code determining unit 235, determine the corresponding described base station scrambled code of described scrambled code identification signal with institute's demodulation.
Thus, because by the scrambled code identification signal is carried out demodulation, can not use pilot channel and directly determine the base station scrambled code, so can realize not being subjected to the Cell searching of influence of the configuration of pilot channel.
Above-mentioned P-SCH correlation value calculation unit 410 is based on passing through regularly detecting unit 420 detected frames timings of frame, the frame synchronization sequence and the output of the correlated results between the described frame synchronization sequence duplicate of the described frame that receives will be configured in, and S-SCH demodulating unit 430 carries out propagation path compensation and it is carried out demodulation the described scrambled code identification signal that extracts based on the correlated results of 410 outputs from P-SCH correlation value calculation unit.
Thus, can use the above-mentioned correlated results of relevant frame synchronization sequence (P-SCH sequence) to carry out the transmission path compensation of relevant scrambled code identification signal (S-SCH sequence), thereby can be reduced in the probability that produces mistake in the demodulation of scrambled code identification signal (S-SCH sequence), described frame synchronization sequence (P-SCH sequence) is subjected to the influence (phase place rotation that is caused by decline and amplitude change etc.) in the propagation path between base station apparatus 300 and mobile station apparatus 400, and described scrambled code identification signal (S-SCH sequence) is subjected to the influence in propagation path too.And then, at the subcarrier that is configured frame synchronization sequence (P-SCH sequence) be configured under the mutually the same situation of the subcarrier of scrambled code identification signal (S-SCH sequence), when carrying out above-mentioned propagation path compensation, use is carried out the propagation path compensation of scrambled code identification signal (S-SCH sequence) about being configured in the correlated results of the frame synchronization sequence (P-SCH sequence) on the identical subcarrier.Owing to thinking the influence that on identical subcarrier, is subjected to identical substantially propagation path, so, can carry out the propagation path compensation of scrambled code identification signal (S-SCH sequence) more expeditiously by using about being configured in the correlated results of the frame synchronization sequence (P-SCH sequence) on the identical subcarrier.
And, in the communication system that constitutes by above-mentioned base station apparatus 300 and mobile station apparatus 400, also can access and above-mentioned same effect.
(execution mode 3)
In execution mode 1 and execution mode 2, P-SCH sequence and S-SCH sequence are directly inputted to SCH insert the unit and it is configured on the frame.Relative therewith, in execution mode 3,, carry out error correction coding in the prime that the S-SCH sequence is input to SCH insertion unit.
The situation that is applicable to execution mode 1 is described, the base station apparatus 500 of execution mode 3 has coding processing unit 155 as illustrated in fig. 12.
155 pairs of S-SCH sequences of this coding processing unit are carried out specific coding, and the S-SCH sequence after will encoding outputs to S-SCH insertion unit 135.As the code that can be used for this specific coding, the Reed-Muller sign indicating number is for example arranged.
By like this S-SCH sequence being encoded, the receiving terminal that can be reduced in the frame that sends from base station apparatus 500 is the possibility that the demodulation mistake takes place the mobile station apparatus 200, and its result can improve the possibility of correctly determining scrambled code.Its result can realize the shortening of the time of the raising of performance of Cell searching and Cell searching.
Industrial applicibility
Base station apparatus of the present invention and mobile station apparatus are base station apparatus and the travelling carriage that carries out multi-carrier communication The impact ground that device, this base station apparatus are suitable for sending the configuration that can not be subjected to the level channel carries out the residential quarter and searches The base station apparatus of the frame of rope, and this mobile station apparatus is suitable for carrying out based on this frame the travelling carriage of Cell searching Device.
Claims (8)
1, a kind of base station apparatus, this base station apparatus carries out multi-carrier communication, comprising:
Frame forms the unit, form frame, in described frame, to be used for frame synchronous frame synchronization sequence regularly, on frequency direction, be configured on a part of code element the multicarrier code element of position of the regulation that begins from the beginning of frame, and, scrambled code identification signal that will be corresponding with the base station scrambled code that is assigned to this base station apparatus, on frequency direction, be configured in the part of described multicarrier code element, so that it is not overlapping on identical code element with described frame synchronization sequence; And
Transmitting element sends described frame.
2, base station apparatus as claimed in claim 1, wherein, described scrambled code identification signal comprises:
The corresponding code group identification signal of code character that forms with described base station scrambled code is divided into groups, and the scrambled code identification signal that in each code character, comprises.
3, a kind of base station apparatus, this base station apparatus carries out multi-carrier communication, comprising:
Frame forms the unit, form frame, in described frame, in the subcarrier that is predetermined, will be used for frame synchronous frame synchronization sequence regularly, on time-axis direction, be configured in the position of the regulation that begins from the beginning of frame, and, scrambled code identification signal that will be corresponding with the base station scrambled code that is assigned to this base station apparatus is being configured on the time-axis direction on the subcarrier that has disposed described frame synchronization sequence, so that it is not overlapping on identical code element with described frame synchronization sequence; And
Transmitting element sends described frame.
4, base station apparatus as claimed in claim 3, wherein, described scrambled code identification signal comprises:
The corresponding code group identification signal of code character that forms with described base station scrambled code is divided into groups, and the scrambled code identification signal that in each code character, comprises.
5, a kind of mobile station apparatus, this mobile station apparatus use the frame that sends from base station apparatus to carry out Cell searching, comprising:
Receiving element, received frame, in described frame, be used for frame synchronous frame synchronization sequence regularly, on frequency direction, be configured on a part of code element the subcarrier symbol of position of the regulation that begins from the beginning of frame, and, the scrambled code identification signal corresponding with the base station scrambled code of described base station apparatus, on frequency direction, be configured in the part of described subcarrier symbol, so that it is not overlapping on identical code element with described frame synchronization sequence;
Correlation unit, the pattern that is configured based on described frame synchronization sequence multiplies each other each subcarrier symbol and the frame synchronization sequence duplicate of the described frame that receives, asks relevant;
Frame is detecting unit regularly, based on the correlation that obtains by described correlation unit, detects frame regularly;
Demodulating unit based on by the regularly detected frame timing of detecting unit of described frame, extracts described scrambled code identification signal and it is carried out demodulation from the described frame that receives; And
Determining unit is determined the corresponding described base station scrambled code of described scrambled code identification signal with institute's demodulation.
6, mobile station apparatus as claimed in claim 5, wherein,
Described correlation unit is based on passing through the regularly detected frame timing of detecting unit of described frame, the frame synchronization sequence and the output of the correlated results between the described frame synchronization sequence duplicate of the described frame that receives will be configured in, described demodulating unit carries out propagation path compensation and it is carried out demodulation the described scrambled code identification signal that extracts based on the correlated results from described correlation unit output.
7, a kind of mobile station apparatus, this mobile station apparatus use the frame that sends from base station apparatus to carry out Cell searching, comprising:
Receiving element, received frame, in described frame, in the subcarrier that is predetermined, be used for frame synchronous frame synchronization sequence regularly, on time-axis direction, be configured in the position of the regulation that begins from the beginning of frame, and, the scrambled code identification signal corresponding with the base station scrambled code that is assigned to described base station apparatus is being configured on the time-axis direction on the subcarrier that described frame synchronization sequence is configured, so that it is not overlapping on identical code element with described frame synchronization sequence;
Correlation unit, the pattern based on described frame synchronization sequence is configured multiplies each other subcarrier signal and the frame synchronization sequence duplicate that has disposed described frame synchronization sequence, asks relevant;
Frame is detecting unit regularly, based on the correlation that obtains by described correlation unit, detects frame regularly;
Demodulating unit based on by the regularly detected frame timing of detecting unit of described frame, extracts described scrambled code identification signal and it is carried out demodulation from the described frame that receives; And
Determining unit is determined the corresponding described base station scrambled code of described scrambled code identification signal with institute's demodulation.
8, mobile station apparatus as claimed in claim 7, wherein,
Described correlation unit is based on passing through the regularly detected frame timing of detecting unit of described frame, the frame synchronization sequence and the output of the correlated results between the described frame synchronization sequence duplicate of the described frame that receives will be configured in, described demodulating unit carries out propagation path compensation and it is carried out demodulation the described scrambled code identification signal that extracts based on the correlated results from described correlation unit output.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005800513124A CN101238665A (en) | 2005-08-19 | 2005-08-19 | Base station device and mobile platform device |
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| CNA2005800513124A CN101238665A (en) | 2005-08-19 | 2005-08-19 | Base station device and mobile platform device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101843017A (en) * | 2007-11-06 | 2010-09-22 | 夏普株式会社 | Base station apparatus, mobile station apparatus, communication system, and cell search method |
| CN102823181A (en) * | 2009-09-25 | 2012-12-12 | 捷讯研究有限公司 | System and method for multi-carrier network operation |
| US10631324B2 (en) | 2009-09-25 | 2020-04-21 | Blackberry Limited | System and method for multi-carrier network operation |
-
2005
- 2005-08-19 CN CNA2005800513124A patent/CN101238665A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101843017A (en) * | 2007-11-06 | 2010-09-22 | 夏普株式会社 | Base station apparatus, mobile station apparatus, communication system, and cell search method |
| CN102823181A (en) * | 2009-09-25 | 2012-12-12 | 捷讯研究有限公司 | System and method for multi-carrier network operation |
| US10631324B2 (en) | 2009-09-25 | 2020-04-21 | Blackberry Limited | System and method for multi-carrier network operation |
| US10826658B2 (en) | 2009-09-25 | 2020-11-03 | Blackberry Limited | System and method for multi-carrier network operation |
| US11937221B2 (en) | 2009-09-25 | 2024-03-19 | Blackberry Limited | System and method for multi-carrier network operation |
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