CN102025393B - Data transmission method and device - Google Patents
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Abstract
本发明涉及通信技术领域，公开了数据传输方法及装置，其中，数据传输方法包括：为子帧中第一时隙的数据生成第一本地参考信息，为该子帧中第二时隙的数据生成第二本地参考信息；为第一时隙的数据生成第一附加参考信息，为第二时隙的数据生成第二附加参考信息；在第一时隙内的同一单载波频分多址符号内发送第一本地参考信息和第一附加参考信息；在第二时隙内的同一单载波频分多址符号内发送第二本地参考信息和第二附加参考信息，第一本地参考信息与第二附加参考信息位于第一子带，第一附加参考信息与第二本地参考信息位于第二子带。使用本发明，可以在不增加系统的冗余度的情况下提高跳频传输模式下的信道估计的准确性。
The present invention relates to the field of communication technology, and discloses a data transmission method and device, wherein the data transmission method includes: generating first local reference information for data in the first time slot in a subframe, generating first local reference information for data in the second time slot in the subframe generating second local reference information; generating first additional reference information for the data of the first time slot, and generating second additional reference information for the data of the second time slot; the same single carrier frequency division multiple access symbol in the first time slot Send the first local reference information and the first additional reference information in the second time slot; send the second local reference information and the second additional reference information in the same single carrier frequency division multiple access symbol in the second time slot, the first local reference information and the first The two additional reference information are located in the first subband, and the first additional reference information and the second local reference information are located in the second subband. By using the present invention, the accuracy of channel estimation in the frequency hopping transmission mode can be improved without increasing the redundancy of the system.
Description
Technical field
The present invention relates to communication technical field, be specifically related to data transmission method and device.
Background technology
The wireless communication system information transmitted can roughly be divided into data (data) and reference information (RS:Reference Signal) two classes.Wherein data are exactly the information that transmitting terminal need send receiving terminal to, and these information are unknown at receiving terminal originally, need transfer to know these information by solution; And reference information is the information that transmitting terminal and receiving terminal have all been known, its effect is that receiving terminal carries out operations such as channel estimating for convenience, thereby helps receiving terminal to carry out the demodulation of data.
Because in fact reference signal can not carry useful information, so reference signal has increased redundancy (Overhead), has reduced the efficient of system, so density can not be too high; But because wireless channel all is constantly to change on time-domain and frequency-domain, under certain conditions, the variation of channel is quite violent, so if reference signal density is too low, receiving terminal just can not be definite the current state of learning channel, in other words be exactly that accuracy of channel estimation reduces, thereby reduce the accuracy of data demodulates.
At LTE(Long Term Evolution) in the system, the BTU of upstream data is subframe (subframe), each subframe comprises two time slots (Slot) again, each Slot comprises several single-carrier frequency division multiple access (SC-FDMA:Single-carrier Frequency Division Multiple Access) symbol, a SC-FDMA symbol can be divided into operable frequency band a plurality of subcarriers (sub-carrier), and each subcarrier can transmit an information symbol after the modulation.
For example when a slot comprises 7 SC-FDMA symbols, (the 4th) the SC-FDMA symbol in the middle of each time slot can be used for transmission of reference signals, and other SC-FDMA symbol is used for transmitting data.At receiving terminal, can at first obtain the channel estimating of reference signal position, and the channel estimating of data division can utilize the channel estimating of reference signal position to calculate, can adopt the method for interpolation on time domain (Interpolation) to obtain.Generally speaking, the channel estimating that the reference signal position obtains can compare accurately, and the density of the order of accuarcy of data division channel estimating utilizable reference signal when depending on channel estimating to a great extent.
Have a kind of transmission mode (FH:Frequency Hopping) that is called frequency hopping in the uplink of LTE system, under this transmission mode, system is divided into a plurality of subbands (subband) that wait width with whole frequency.Under frequency-hopping mode, two Slot in a user's the subframe will be placed on the different subbands and transmit.Has only a reference signal in each Slot, just can only utilize a reference signal to carry out when doing the channel estimating of data division this moment, because can't carry out interpolation operation on the time domain this moment, therefore generally can only directly adopt channel estimating on the reference signal as the channel estimating of data division.
If channel changes slowly in time domain, then directly adopt the channel estimating on the reference signal very little to the accuracy influence of channel estimating as the channel estimating of data division, but (user terminal is with very high speed motion if Quick-Change channel, for example on bullet train), then directly adopt the channel estimating on the reference signal lower as the accuracy of the channel estimating of data division.The inventor discovers, when user's translational speed when 3 kilometer per hours (kmph), the accuracy difference of the channel estimating of frequency hopping transmission mode and non-frequency hopping transmission mode almost can be ignored, after but user's translational speed had arrived 150kmph even 300kmph, the accuracy difference of the channel estimating of frequency hopping transmission mode and non-frequency hopping transmission mode was just quite obvious.
In order to improve the performance under the frequency hopping transmission mode, existing a kind of improved procedure is the density that strengthens reference signal, for example is embedded in two reference signals at a slot.
Though use this mode can improve the accuracy that frequency hopping transmission mode lower channel is estimated, increased the redundancy of system, reduced system effectiveness.
Summary of the invention
The embodiment of the invention provides data transmission method and device, can be in the accuracy that improves the channel estimating under the frequency hopping transmission mode under the situation of the redundancy that does not increase system.
The embodiment of the invention provides a kind of data transmission method, comprising:
For the data of first time slot in the subframe generate the first local reference information, for the data of second time slot in this subframe generate the second local reference information;
For the data of described first time slot generate first additional reference information, be that the data of second time slot generate second additional reference information;
Send the described first local reference information and first additional reference information in the same single-carrier frequency division multiple access symbol in first time slot; Send the described second local reference information and described second additional reference information in the same single-carrier frequency division multiple access symbol in second time slot, the described first local reference information and described second additional reference information are positioned at first subband, and described first additional reference information and the described second local reference information are positioned at second subband.
The embodiment of the invention also provides a kind of data transmission device, comprising:
Local reference information generation unit is used to the data of first time slot in the subframe to generate the first local reference information, and generates the second local reference information for the data of second time slot in this subframe;
The additional reference information generation unit is used to the data of described first time slot to generate first additional reference information, and generates second additional reference information for the data of described second time slot;
Transmitting element is used for sending in the same single-carrier frequency division multiple access symbol in first time slot described first local reference information and first additional reference information; Send the described second local reference information and described second additional reference information in the same single-carrier frequency division multiple access symbol in second time slot, the described first local reference information and described second additional reference information are positioned at first subband, and described first additional reference information and the described second local reference information are positioned at second subband.
The above technical scheme that provides from the embodiment of the invention as can be seen, because the embodiment of the invention can send local reference information and additional reference information simultaneously in different sub-band when the transmission data, need not to increase the reference signal density in the same time slot, therefore do not increase the redundancy of system, can not reduce system effectiveness, can make simultaneously the local reference information of receiving terminal utilization and additional reference information carry out channel estimating, improve the accuracy that frequency hopping transmission mode lower channel is estimated.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the flow chart of data transmission method embodiment one in the embodiment of the invention;
Fig. 2 is the position view of additional reference information and local reference information in the embodiment of the invention;
Fig. 3 is the flow chart of data transmission method embodiment two in the embodiment of the invention;
Fig. 4 is the structure chart of data transmission device embodiment one in the embodiment of the invention;
Fig. 5 is the structure chart of data transmission device embodiment two in the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Introduce the data transmission method that the embodiment of the invention provides earlier, Fig. 1 has described the flow process of data transmission method embodiment one, and what this embodiment described is the transmission course of a time slot in the subframe, comprising:
101, the data for first time slot in the subframe generate the first local reference information, for the data of second time slot in this subframe generate the second local reference information.
The subframe of uplink comprises two time slots in the LTE system, and this first time slot can be any one in these two time slots, and then second time slot is another.Specifically can adopt following flow process to generate the first local reference information:
Obtain the local sequence in the first displacement back according to the first cyclic shift coefficient in root sequence and first subband, the quantity of the subcarrier that the quantity of the numerical value that the root sequence is included and subband are included is identical; Wherein, the root sequence is predefined, and the embodiment of the invention is not done any restriction to the included data type of root sequence, only needs transmitting terminal and receiving terminal can know that the root sequence can not influence the realization of the embodiment of the invention.For example, a subband accounts for 120 subcarriers at frequency domain, and then the length of root sequence is 120.Suppose that the first cyclic shift coefficient is α
1, α
1Span can be α
1∈ (0,2 π).
According to the position of subcarrier in first subband of the data of transmitting first time slot, the short sequence of intercepting is as the first local reference information from the local sequence in the first displacement back.For example, the subcarrier that transmits the data of first time slot is the 12nd to 36 subcarrier in first subband, then intercepts the 12nd to 36 of the local sequence in displacement back as the first local reference information.
Can adopt following flow process to generate the second local reference information:
Obtain the local sequence in the second displacement back according to the second cyclic shift coefficient in root sequence and second subband, the quantity of the subcarrier that the quantity of the numerical value that the root sequence is included and subband are included is identical, and the second cyclic shift coefficient is not equal to the first cyclic shift coefficient.Suppose that the first cyclic shift coefficient is α
2, α
2Span can be α
2∈ (0,2 π).
According to the position of subcarrier in second subband of the data of transmitting second time slot, the short sequence of intercepting is as the second local reference information from the local sequence in the second displacement back.For example, the subcarrier that transmits the data of second time slot is the 72nd to 96 subcarrier in second subband, then intercepts the 72nd to 96 of the local sequence in displacement back as the first local reference information.
102, being that the data of first time slot generate first additional reference information, is that the data of second time slot generate second additional reference information.
Specifically can adopt following flow process to generate first additional reference information:
Obtain the first displacement back appended sequence according to the second cyclic shift coefficient in root sequence and second subband, the second cyclic shift coefficient is not equal to the first cyclic shift coefficient.Suppose that the second cyclic shift coefficient is α
2, α
2Span can be α
2∈ (0,2 π) can carry out channel estimating better in order to make receiving terminal, can make the first cyclic shift coefficient and the described second cyclic shift coefficient anti-phase, namely | and α
1-α
2|=π.
According to the position of subcarrier in second subband of the data of second time slot in the transmission subframe, the short sequence of intercepting is as first additional reference information from the first displacement back appended sequence.For example, the subcarrier that transmits the data of second time slot is the 72nd to 96 subcarrier in second subband, then intercepts the 72nd to 96 of the root sequence as first additional reference information.
Specifically can adopt following flow process to generate second additional reference information:
Obtain the second displacement back appended sequence according to the first cyclic shift coefficient in root sequence and first subband.The second cyclic shift coefficient is α
2, α
2Span can be α
2∈ (0,2 π) can carry out channel estimating better in order to make receiving terminal, can make the first cyclic shift coefficient and the described second cyclic shift coefficient anti-phase, namely | and α
1-α
2|=π.
According to the position of subcarrier in first subband of the data of first time slot in the transmission subframe, the short sequence of intercepting is as second additional reference information from the second displacement back appended sequence.For example, the subcarrier that transmits the data of first time slot is the 12nd to 36 subcarrier in first subband, then intercepts the 12nd to 36 of the root sequence as second additional reference information.
103, send the first local reference information and first additional reference information in the same SC-FDMA symbol in first time slot; Send the second local reference information and second additional reference information in the same SC-FDMA symbol in second time slot, the first local reference information and second additional reference information are positioned at first subband, and first additional reference information and the second local reference information are positioned at second subband.
In one embodiment of the invention, can in the residing frequency range of subcarrier of the data of transmitting first time slot, send the first local reference information; In the residing frequency range of subcarrier of the data of transmitting second time slot, send first additional reference information simultaneously.Correspondingly, can in the residing frequency range of subcarrier of the data of transmitting second time slot, send the second local reference information; In the residing frequency range of subcarrier of the data of transmitting first time slot, send second additional reference information simultaneously.
The step that sends the described first local reference information and first additional reference information in the described same single-carrier frequency division multiple access symbol in first time slot can comprise: send the described first local reference information and first additional reference information in the middle single-carrier frequency division multiple access symbol in first time slot;
The step that sends the described second local reference information and described second additional reference information in the described same single-carrier frequency division multiple access symbol in second time slot comprises: send the described second local reference information and described second additional reference information in the middle single-carrier frequency division multiple access symbol in second time slot.
This method also can comprise: transmit data in other single-carrier frequency division multiple access symbol in first time slot and second time slot except middle single-carrier frequency division multiple access symbol.
In the embodiment of the invention position view of additional reference information and local reference information as shown in Figure 2, the information of user A in first time slot 201 is positioned at frequency band f
1～f
2, f wherein
1～f
2The frequency range of representing the frequency range that this frequency band takies is from f
1To f
2And second time slot 202 interior information is positioned at frequency band f
3～f
4, f wherein
3～f
4The frequency range of representing the frequency range that this frequency band takies is from f
3To f
4The f of user A the 4th SC-FDMA symbol (supposing that a time slot comprises seven SC-FDMA symbols) in first time slot 201
1～f
2Send the first local reference information 2011 on the frequency range, simultaneously the f of the 4th SC-FDMA symbol 2011 in first time slot 201
3～f
4Send first additional reference information 2012 on the frequency range.Correspondingly, the f of user A the 4th SC-FDMA symbol (supposing that a time slot comprises seven SC-FDMA symbols) in second time slot 202
3～f
4Send the second local reference information 2021 on the frequency range, simultaneously the f of the 4th SC-FDMA symbol 2021 in second time slot 202
1～f
2Send second additional reference information 2022 on the frequency range.Thereby the first local reference information and second additional reference information are positioned on the similar frequency bands of same sub-band, but are positioned at different time-gap; The second local reference information and first additional reference information are positioned on the similar frequency bands of same sub-band, but are positioned at different time-gap.
From the above, because the embodiment of the invention can send local reference information and additional reference information simultaneously in different sub-band when the transmission data, need not to increase the reference signal density in the same time slot, therefore do not increase the redundancy of system, can not reduce system effectiveness, can make simultaneously the local reference information of receiving terminal utilization and additional reference information carry out channel estimating, improve the accuracy that frequency hopping transmission mode lower channel is estimated.
Introduce the data transmission method embodiment two that the embodiment of the invention provides again, idiographic flow as shown in Figure 3, this embodiment has described the generative process of the reference information of two time slots in the subframe, the local reference signal that among this embodiment the user should be sent originally is called Local RS, and the additional reference signal that additionally sends is called Ghost RS.
301, definition root sequence.
Be root sequence of each subband definition
Wherein
The length of root sequence is
Equate with the number of the shared subcarrier of subband, suppose that subband accounts for 130 subcarriers at frequency domain, then define a length and be 130 root sequence
The embodiment of the invention does not limit how defining the root sequence, as long as can obtain the realization that the root sequence can not influence the embodiment of the invention.For example can generate the Zadoff-Chu sequence as the root sequence.
302, generate Local RS.
The generation of the Local RS of the one Slot: at first the root sequence be multiply by cyclically shifted sequences, the local sequence in back that obtains being shifted, this local sequence in displacement back is
α wherein
1Be the first cyclic shift coefficient, the first cyclic shift coefficient satisfies α
1∈ (0,2 π).Then according to the transmission the one slot the position of subcarrier in first subband, from
The corresponding short sequence of middle intercepting is as the Local RS of a Slot.For example 12nd to 36 subcarrier of data in subband in user A the one Slot transmits, then from
In the intercepting the 12nd to the 36th as Local RS.Wherein, after the displacement of the time slot in first subband local sequence all according to α
1Obtain.
The generation of the Local RS of the 2nd Slot: at first the root sequence be multiply by cyclically shifted sequences, the local sequence in back that obtains being shifted, this local sequence in displacement back is
α wherein
2Be the second cyclic shift coefficient, and α
2≠ α
1Then according to the transmission the 2nd slot the position of subcarrier in second subband, from
The corresponding short sequence of middle intercepting is as the Local RS of the 2nd Slot.Wherein, after the displacement of the time slot in second subband local sequence all according to α
2Obtain.
303, generate Ghost RS.
The generation of the Ghost RS of the one Slot: at first the root sequence be multiply by cyclically shifted sequences, the back appended sequence that obtains being shifted, this displacement back appended sequence is
α wherein
2Be the second cyclic shift coefficient, i.e. the cyclic shift coefficient that adopts of the Local RS of the 2nd Slot.Then according to the transmission the 2nd slot the position of subcarrier in second subband, from
The corresponding short sequence of middle intercepting is as the Ghost RS sequence of a Slot.For example the data of user A the 2nd Slot are transmitted at the 72nd to 96 subcarrier of second subband, then from
The 72nd to the 96th Ghost RS as a Slot of middle intercepting.Wherein, after the displacement of the slot in first subband appended sequence all according to α
2Obtain.
The generation of Ghost RS in the 2nd Slot: at first the root sequence be multiply by cyclically shifted sequences, the back appended sequence that obtains being shifted, this displacement back appended sequence is
α wherein
1Be the second cyclic shift coefficient, i.e. the cyclic shift coefficient that adopts of the Local RS of a Slot.Then according to the transmission the one slot the position of subcarrier in first subband, from
The corresponding short sequence of middle intercepting is as the Ghost RS sequence of the 2nd Slot.Wherein, after the displacement of the slot in second subband appended sequence all according to α
1Obtain.
304, send Local RS and Ghost RS.
This step specifically can be carried out with reference to 103.
From the above, present embodiment can send local reference information and additional reference information simultaneously when the transmission data, therefore do not increase the redundancy of system, can not reduce system effectiveness, can make simultaneously the local reference information of receiving terminal utilization and additional reference information carry out channel estimating, improve the accuracy that frequency hopping transmission mode lower channel is estimated.
Because being the local reference information with another user, a user's additional reference information transmits at same running time-frequency resource, therefore receiving terminal need be distinguished these two users' additional reference information and local reference information, thereby obtains these two users' channel estimating respectively.A kind of possible differentiation mode is as follows: receiving terminal can carry out fast Fourier transform (FFT) to the received signal, because the cyclic shift coefficient difference of these two users' signal, make these two users' signal that different cyclic shifts be arranged, and because the multidiameter delay characteristic of wireless channel, through after the FFT, these two users' signal will be positioned at different positions, therefore can both be taken out respectively with window function, do quick inversefouriertransform (IFFT) more respectively, obtain these two users' channel estimating.
Introduce the data transmission device that the embodiment of the invention provides again, Fig. 4 has described the structure of data transmission device embodiment one, comprising:
Local reference information generation unit 401 is used to the data of first time slot in the subframe to generate the first local reference information, and generates the second local reference information for the data of second time slot in this subframe.
Additional reference information generation unit 402 is used to the data of first time slot to generate first additional reference information, and is that the data of second time slot generate second additional reference information.
Transmitting element 403 is used for sending in the same SC-FDMA symbol in first time slot first local reference information of local reference information generation unit 401 generations and first additional reference information that additional reference information generation unit 402 generates; Send the second local reference information of local reference information generation unit 401 generations and second additional reference information that additional reference information generation unit 402 generates in the same SC-FDMA symbol in second time slot, wherein, the first local reference information and second additional reference information are positioned at first subband, and first additional reference information and the second local reference information are positioned at second subband.
From the above, data transmission device can send local reference information and additional reference information simultaneously in the present embodiment when the transmission data, therefore do not increase the redundancy of system, can not reduce system effectiveness, can make simultaneously the local reference information of receiving terminal utilization and additional reference information carry out channel estimating, improve the accuracy that frequency hopping transmission mode lower channel is estimated.
Fig. 5 has described the structure of data transmission device embodiment two, comprising:
Local reference information generation unit 501 is used to the data of first time slot in the subframe to generate the first local reference information; For the data of second time slot in this subframe generate the second local reference information.
As shown in Figure 5, in one embodiment of the present of invention, local reference information generation unit 501 can comprise: the local sequence in displacement back obtains unit 5011, be used for obtaining the local sequence in the first displacement back according to the first cyclic shift coefficient in root sequence and first subband, obtain the local sequence in the second displacement back according to the second cyclic shift coefficient in root sequence and second subband, the quantity of the subcarrier that the quantity of the numerical value that the root sequence is included and subband are included is identical, and the second cyclic shift coefficient is not equal to the first cyclic shift coefficient; Local reference information interception unit 5012, be used for subcarrier according to the data of transmission first time slot in the position of first subband, obtain the local sequence in the first displacement back that unit 5011 obtains the short sequence of intercepting as the first local reference information from the local sequence in back that is shifted; According to the position of subcarrier in second subband of the data of transmitting second time slot, intercept the weak point sequence as the second local reference information the local sequence after second displacement that local sequence acquisition unit 5011 obtains after being shifted.
Additional reference information generation unit 502 is used to the data of first time slot to generate first additional reference information;
As shown in Figure 5, in one embodiment of the present of invention, additional reference information generation unit 502 can comprise: displacement back appended sequence obtains unit 5021, be used for obtaining the first displacement back appended sequence according to the second cyclic shift coefficient in root sequence and second subband, obtain the second displacement back appended sequence according to the first cyclic shift coefficient in root sequence and first subband; The quantity of the subcarrier that the quantity of the numerical value that the root sequence is included and subband are included is identical; The second cyclic shift coefficient is not equal to the first cyclic shift coefficient; Additional reference information interception unit 5022, be used for the position of subcarrier in second subband according to the data of transmission subframe second time slot, intercepting weak point sequence is as first additional reference information from the first displacement back appended sequence that the appended sequence acquisition unit, back 5021 that is shifted obtains; According to the position of subcarrier in first subband of the data of first time slot in the transmission subframe, intercepting weak point sequence is as second additional reference information from the second displacement back appended sequence that the appended sequence acquisition unit, back 5021 that is shifted obtains.
Transmitting element 503, be used for sending in the same SC-FDMA symbol in first time slot first local reference information of local reference information generation unit 501 generations and first additional reference information that additional reference information generation unit 502 generates, wherein, the first local reference information is positioned at different subbands with first additional reference information at frequency domain; Send the second local reference information of local reference information generation unit 501 generations and second additional reference information that additional reference information generation unit 502 generates in the same SC-FDMA symbol in second time slot, wherein, the second local reference information and second additional reference information are positioned at different sub-band at frequency domain.
As shown in Figure 5, in one embodiment of the present of invention, transmitting element 503 can comprise: first transmitting element 5031 is used for sending in the single-carrier frequency division multiple access symbol middle in first time slot first local reference information of local reference information generation unit 501 generations and first additional reference information that additional reference information generation unit 502 generates; Second transmitting element 5032 is used for sending in the single-carrier frequency division multiple access symbol middle in second time slot local reference information generation unit 501 second local reference informations and additional reference information generation unit 502 second additional reference information.
From the above, data transmission device can send local reference information and additional reference information simultaneously in the present embodiment when the transmission data, therefore do not increase the redundancy of system, can not reduce system effectiveness, can make simultaneously the local reference information of receiving terminal utilization and additional reference information carry out channel estimating, improve the accuracy that frequency hopping transmission mode lower channel is estimated.
The embodiment of the invention also provides communication system, and this communication system comprises data transmission device and the receiving system that the embodiment of the invention provides.Because data transmission device can send local reference information and additional reference information simultaneously among the communication system embodiment when the transmission data, therefore do not increase the redundancy of system, can not reduce system effectiveness, can make simultaneously the local reference information of receiving terminal utilization and additional reference information carry out channel estimating, improve the accuracy that frequency hopping transmission mode lower channel is estimated.The information that this data transmission device sends is received by described receiving system, and described data transmission device and receiving system can include but not limited to base station or terminal.
Contents such as the information interaction between said apparatus and intrasystem each module, implementation and since with the inventive method embodiment based on same design, particular content can repeat no more referring to the narration among the inventive method embodiment herein.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in above-described embodiment method, be to instruct relevant hardware to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
More than data transmission method and device that the embodiment of the invention is provided be described in detail, the explanation of above embodiment just is used for helping to understand method of the present invention and thought thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
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| EP1115220A2 (en) * | 2000-01-05 | 2001-07-11 | Robert Bosch Gmbh | Method and device for data exchange between at least two subscribers connected by a bus system |
| CN101253806A (en) * | 2005-08-30 | 2008-08-27 | Lg电子株式会社 | Method and apparatus for encoding and decoding an audio signal |
| CN1956432A (en) * | 2005-10-28 | 2007-05-02 | 华为技术有限公司 | A method for allocating time-frequency resources in a scheduling and frequency-hopping multiplexing system |
| CN101399601A (en) * | 2007-09-26 | 2009-04-01 | 展讯通信（上海）有限公司 | Time division system frame construction, setting method, processing method and device thereof |
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