Method and device for transmitting data at different repetition levels, and method and device for receiving data at different repetition levels
地域：
CA
CA Torrance
摘要
A method and device for transmitting data and a method and device for receiving data are provided. The method for transmitting data comprises: processing the data in at least five processes of cyclic redundancy check attachment, channel coding, rate matching, modulation and resource element mapping to generate a signal; and transmitting the signal in a plurality of subframes with a repetition level i, wherein the repetition level i is selected from a repetition level set including at least two different repetition levels, and for repetition level i, the data are transmitted in Ri subframes, and for different repetition levels, values of Ri are different, and wherein the data are processed by the five processes or by the five processes and at least one additional process to generate different signals to be transmitted according to different repetition levels.
說(shuō)明書(shū)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
The present disclosure relates to the field of data transmission with multiple repetition levels in Machine-Type Communication.
MTC (Machine-Type Communication) is an important revenue stream for operators and has a huge potential from the operator perspective. Based on the market and operators' requirements, there are two requirements for MTC operation in LTE (Long Term Evolution). One is low-cost of MTC UEs (User Equipments) and communication; another is improving the coverage of MTC UEs, for example 15 dB coverage enhancement is required for MTC enhancement. To enhance the MTC coverage, almost each of the physical channels need to be enhanced including (E)PDCCH ((Enhanced) Physical downlink Control Channel). For example, coverage enhancement target for (E)PDCCH is 9.6 dB for FDD (Frequency-Division Duplex) and 14.6 dB for TDD (Time-Division Duplex).
For (E)PDCCH, repetition in time domain is the main method to improve the coverage. Based on simulation results presented in 3GPP (The 3rd Generation Partnership Project) meeting, hundreds of repetitions are needed for (E)PDCCH transmission. For example, for (E)PDCCH with the coverage enhancement target 9.6 dB as described above, approximately 100?200 repetitions are required. To satisfy multiple different coverage requirements, multiple repetition levels are supported and different repetition levels correspond to different integral (E)PDCCH repetition numbers. (E)PDCCH repetitions will be transmitted in multiple concentrated subframes. For each repetition level, integral (E)PDCCH repetitions transmit signals carrying one DCI (Downlink control information).
權(quán)利要求
What is claimed is:1. A method for transmitting data, comprising:processing the data in at least five processes of cyclic redundancy check attachment, channel coding, rate matching, modulation and resource element mapping to generate a signal; and transmitting the signal in a plurality of subframes with a repetition level i, wherein the repetition level i is selected from a repetition level set including at least two different repetition levels, and for repetition level i, the data are transmitted in Ri subframes, and for different repetition levels, values of Ri are different, and wherein the data are processed by the five processes or by the five processes and at least one additional process to generate different signals to be transmitted according to different repetition levels. 2. The method according to claim 1 , further comprising a process of bit permutation after the process of cyclic redundancy check attachment and before the process of channel coding, wherein in the process of bit permutation, bit permutation patterns are different for different repetition levels. 3. The method according to claim 1 , wherein in the process of rate matching, coding rates are different for different repetition levels. 4. The method according to claim 1 , further comprising two processes of repetition and bit permutation after the process of rate matching and before the process of modulation,wherein, in the process of repetition, m bits obtained after the process of rate matching are repeated into m*M bits in which M is no more than Ri, and wherein, in the process of bit permutation, bit permutation patterns are different for different repetition levels. 5. The method according to claim 4 , wherein in the process of repetition, values of M are different for different repetition levels. 6. The method according to claim 1 , further comprising a process of symbol permutation after the process of modulation and before the process of resource element mapping, wherein in the process of symbol permutation, symbol permutation patterns are different for different repetition levels. 7. The method according to claim 6 , further comprising a process of repetition after the process of modulation and before the process of symbol permutation, wherein in the process of repetition, n symbols obtained after the process of modulation are repeated into n*N symbols in which N is no more than Ri. 8. The method according to claim 7 , wherein in the process of repetition, values of N are different for different repetition levels. 9. The method according to claim 1 , further comprising a process of repetition after the process of modulation and before the process of resource element mapping,wherein in the process of repetition, n symbols obtained after the process of modulation are repeated into n*N symbols in which N is no more than Ri, and values of N are different for different repetition levels, and wherein in the process of resource element mapping, n*N symbols are mapped onto N subframes in the increasing order of first time domain and then frequency domain. 10. The method according to claim 1 , wherein in the process of resource element mapping, symbols obtained after the process of modulation are mapped onto different resource elements in one subframe for different repetition levels. 11. A device for transmitting data, comprising:a processing unit configured to process the data in at least five processes of cyclic redundancy check attachment, channel coding, rate matching, modulation and resource element mapping to generate a signal; and a transmission unit configured to transmit the signal in a plurality of subframes with a repetition level i, wherein the repetition level i is selected from a repetition level set including at least two different repetition levels, and for repetition level i, the data are transmitted in Ri subframes, and for different repetition levels, values of Ri are different, and wherein the data are processed by the five processes or by the five processes and at least one additional process to generate different signals to be transmitted according to different repetition levels. 12. The device according to claim 11 , wherein the processing unit further comprises a process of bit permutation after the process of cyclic redundancy check attachment and before the process of channel coding, wherein in the process of bit permutation, bit permutation patterns are different for different repetition levels. 13. The device according to claim 11 , wherein in the process of rate matching, coding rates are different for different repetition levels. 14. The device according to claim 11 , wherein the processing unit further comprises two processes of repetition and bit permutation after the process of rate matching and before the process of modulation,wherein, in the process of repetition, m bits obtained after the process of rate matching are repeated into m*M bits in which M is no more than Ri, and wherein, in the process of bit permutation, bit permutation patterns are different for different repetition levels. 15. The device according to claim 11 , wherein the processing unit further comprises a process of symbol permutation after the process of modulation and before the process of resource element mapping, wherein in the process of symbol permutation, symbol permutation patterns are different for different repetition levels. 16. The device according to claim 15 , wherein the processing unit further comprises a process of repetition after the process of modulation and before the process of symbol permutation, wherein in the process of repetition, n symbols obtained after the process of modulation are repeated into n*N symbols in which N is no more than Ri. 17. The device according to claim 11 , wherein the processing unit further comprises a process of repetition after the process of modulation and before the process of resource element mapping,wherein in the process of repetition, n symbols obtained after the process of modulation are repeated into n*N symbols in which N is no more than Ri, and values of N are different for different repetition levels, and wherein in the process of resource element mapping, n*N symbols are mapped onto N subframes in the increasing order of first time domain and then frequency domain. 18. The device according to claim 11 , wherein in the process of resource element mapping, symbols obtained after the process of modulation are mapped onto different resource elements in one subframe for different repetition levels. 19. A method for receiving data, comprising:receiving a signal transmitted in a plurality of subframes with a repetition level i and obtaining the repetition level i based on the received signal, wherein the data are processed in at least five processes of cyclic redundancy check attachment, channel coding, rate matching, modulation and resource element mapping to generate the signal, wherein the repetition level i is selected from a repetition level set including at least two different repetition levels, and for repetition level i, the data are transmitted in Ri subframes, and for different repetition levels, values of Ri are different, and wherein the data are processed by the five processes or by the five processes and at least one additional process to generate different signals to be transmitted according to different repetition levels. 20. A device for receiving data, comprising:a reception unit configured to receive a signal transmitted in a plurality of subframes with a repetition level i and to obtain the repetition level i based on the received signal, and a processor configured to process the signal to obtain the data, wherein the data are processed in at least five processes of cyclic redundancy check attachment, channel coding, rate matching, modulation and resource element mapping to generate the signal, wherein the repetition level i is selected from a repetition level set including at least two different repetition levels, and for repetition level i, the data are transmitted in Ri subframes, and for different repetition levels, values of Ri are different, and wherein the data are processed by the five processes or by the five processes and at least one additional process to generate different signals to be transmitted according to different repetition levels.
意見(jiàn)反饋
使用該功能遇到問(wèn)題
該功能需要專業(yè)版企業(yè)版VIP權(quán)限，您可以：
您也可以聯(lián)系官方QQ: 2157717237 電話: 13264338900