WO2016165095A1 - 信息传输方法、装置以及通信系统 - Google Patents
信息传输方法、装置以及通信系统 Download PDFInfo
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- WO2016165095A1 WO2016165095A1 PCT/CN2015/076716 CN2015076716W WO2016165095A1 WO 2016165095 A1 WO2016165095 A1 WO 2016165095A1 CN 2015076716 W CN2015076716 W CN 2015076716W WO 2016165095 A1 WO2016165095 A1 WO 2016165095A1
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- noma
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- information transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
Definitions
- the present invention relates to the field of communications technologies, and in particular, to a non-orthogonal multiple access (NOMA) information transmission method, apparatus, and communication system.
- NOMA non-orthogonal multiple access
- NOMA technology is based on the theory of superposition codes.
- the transmitting end sends superimposed symbols, and the receiving end needs to use SIC (Successive Interference Cancel) technology to separate and recover data information.
- SIC Successessive Interference Cancel
- the NOMA technology can theoretically realize the entire capacity domain of the downlink broadcast channel and the uplink multiple access channel.
- the downlink channel of two user equipments is taken as an example to provide the transceiving models of orthogonal and non-orthogonal modes respectively. It is assumed that the base station and the user equipment both use a single antenna, the user equipment 1 is located at the center of the cell, the experienced channel is represented as h 1 , the noise is represented as n 1 , the user equipment 2 is located at the cell edge, the experienced channel is represented as h 2 , and the noise is represented as n 2 .
- the base station transmits the symbol s 1 to the user equipment 1, and transmits the symbol s 2 to the user equipment 2, and the total power of the base station is P.
- the base station transmits the symbols of the user equipment 1 and the user equipment 2 by using different time or frequency resources
- the receiving symbols of the user equipment 1 and the user equipment 2 may be respectively represented as
- the user equipment independently demodulates its own data symbols.
- the base station allocates different powers for different symbols, and uses the same time-frequency resource to transmit superimposed symbols on one power domain.
- the cell edge user equipment 2 independently demodulates its own symbol s 2 , and the cell center user equipment 1 needs to use the serial interference cancellation to demodulate its own symbol s 1 .
- the user equipment 1 since it has better channel conditions than the cell edge user equipment 2, it is also possible to demodulate the symbol s 2 , perform interference cancellation after demodulating s 2 , remove s 2 interference, and obtain interference after deletion. Intermediate results Further, based on the result, the self symbol s 1 is demodulated.
- Embodiments of the present invention provide a NOMA information transmission method, apparatus, and communication system. Use the MCS table that supports NOMA to select the appropriate modulation scheme and code rate.
- an information transmission method is provided, which is applied to a base station of a NOMA system, where the information transmission method includes:
- an information transmission apparatus configured in a base station of a NOMA system, where the information transmission apparatus includes:
- a signal to interference and noise ratio calculation unit that calculates a NOMA signal to interference and noise ratio according to the CQI
- the data modulating unit searches for the MCS table supporting the NOMA according to the NOMA signal to interference and noise ratio, selects an appropriate modulation mode and code rate according to the search result, and modulates the data to be sent;
- a data sending unit that transmits the modulated data to the user equipment.
- an information transmission method is provided, which is applied to a user equipment of a NOMA system, where the information transmission method includes:
- a suitable modulation scheme and code rate are selected from the MCS table supporting NOMA, and the data is demodulated.
- an information transmission apparatus which is configured in a user equipment of a NOMA system, and the information transmission apparatus includes:
- a data receiving unit receiving data sent by the base station
- the data demodulation unit selects an appropriate modulation mode and code rate from the MCS table supporting NOMA, and demodulates the data.
- a communication system using NOMA comprising:
- a user equipment feeding back, to the base station, the CQI generated according to an OFDM signal to interference and noise ratio; receiving the The data transmitted by the base station selects an appropriate modulation mode and code rate from the MCS table supporting the NOMA, and demodulates the data.
- a computer readable program wherein when the program is executed in a base station, the program causes a computer to execute an information transmission method as described above in the base station.
- a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform an information transmission method as described above in a base station.
- a computer readable program wherein when the program is executed in a user device, the program causes a computer to execute an information transmission method as described above in the user device.
- a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform an information transmission method as described above in a user equipment.
- An advantageous effect of the embodiments of the present invention is to use an MCS table supporting NOMA to select an appropriate modulation mode and a code rate; thus, no NOMA signal to interference and noise ratio exceeds the MCS table range, and the low signal dry noise ratio can be reduced.
- the block error rate under conditions improves the throughput of the NOMA system.
- FIG. 1 is a schematic diagram of an information transmission method according to Embodiment 1 of the present invention.
- FIG. 2 is a schematic diagram of an information transmission method according to Embodiment 2 of the present invention.
- FIG. 3 is a schematic diagram of an information transmission apparatus according to Embodiment 3 of the present invention.
- FIG. 4 is a schematic diagram of a base station according to Embodiment 3 of the present invention.
- FIG. 5 is a schematic diagram of an information transmission apparatus according to Embodiment 4 of the present invention.
- FIG. 6 is a schematic diagram of a user equipment according to Embodiment 4 of the present invention.
- Figure 7 is a schematic diagram of a communication system according to Embodiment 5 of the present invention.
- the base station searches the MCS table according to the Channel Quality Indicator (CQI) fed back by the user equipment, so as to select a modulation mode and a code rate suitable for the current channel for data transmission; wherein, the CQI corresponds to the user.
- CQI Channel Quality Indicator
- the SINR of the device and the MCS table match the typical signal to interference and noise ratio distribution in the Orthogonal Frequency Division Multiplexing (OFDM) mode.
- OFDM Orthogonal Frequency Division Multiplexing
- the spectrum efficiency improvement brought by the NOMA technology comes from the fact that the user equipment can continuously use all the time-frequency resources.
- the SINR of the user equipment is compared with the orthogonal situation in each channel use. There is also a decrease.
- the SINR distribution changes, and the NOMA SINR may exceed the range of the MCS table in the existing standard, resulting in a code block transmission error, which ultimately affects the throughput performance of the NOMA.
- the embodiment of the invention provides an information transmission method, which is applied to a base station of a NOMA system.
- FIG. 1 is a schematic diagram of an information transmission method according to an embodiment of the present invention. As shown in FIG. 1, the information transmission method includes:
- Step 101 The base station receives a CQI fed back by the user equipment, where the CQI is generated by the user equipment according to an OFDM signal to interference and noise ratio;
- Step 102 Calculate a NOMA signal to interference and noise ratio according to the CQI;
- Step 103 The base station searches for the MCS table supporting the NOMA according to the NOMA signal to interference and noise ratio, selects an appropriate modulation mode and a code rate according to the search result, and modulates the data to be sent.
- Step 104 The base station sends the modulated data to the user equipment.
- step 102 reference may be made to the related art as to how to calculate the NOMA SINR based on the CQI.
- the NOMA-enabled MCS table is formed by using reserved locations in an MCS table that supports OFDM.
- an index with an index of 29 and reserved for Quadrature Phase Shift Keying is used, and the index is 29 and reserved for QPSK.
- the item uses a different transport block size index (I TBS ) value than the others.
- the MCS table defined in the existing physical layer standard (that is, the MCS table supporting OFDM) is as shown in Table 1.
- the SINR of the user equipment decreases. If the SINR falls to a lower level, it will exceed the applicable range of the lowest MCS index in Table 1. At this time, even if the modulation mode and code rate indicated by the lowest MCS index are used for transmission. However, it is still not guaranteed that the receiving end can receive reliably with a block error rate of 0.1.
- the MCS and the NOMA SINR can be re-matched by adding a number of MCSs for low SINR usage to Table 1. Among them, the reserved position in Table 1 can be reused.
- Table 2 is an example of an MCS table supporting NOMA.
- the I TBS value increases as well as the transport block size corresponding to the transport block size table; wherein each of the transport block size corresponding to the value of the I TBS I TBS values are smaller than the size of each transport block corresponding to 0:00.
- Table 3 supports the transport block size table of NOMA
- the number of bits used to indicate the MCS in the Physical Downlink Control Channel (PDCCH) signaling is not increased, that is, the number of bits is not increased.
- the overhead of physical layer signaling since the reserved bits in the MCS table supporting the OFDM are reused, the number of bits used to indicate the MCS in the Physical Downlink Control Channel (PDCCH) signaling is not increased, that is, the number of bits is not increased.
- a dedicated MCS table can be defined for NOMA transmissions.
- the NOMA-enabled MCS table may be formed by deleting a part of the high-order term and adding a part of the low-order term in the OFDM-supporting MCS table.
- the number of rows of the MCS table supporting the NOMA is less than or equal to the number of rows of the MCS table supporting the OFDM. That is, the deletion and addition need to meet the criterion that the number of new table rows does not exceed the number of original table rows, so that no additional signaling bit overhead is required when indicating the MCS.
- Table 4 is another example of an MCS table supporting NOMA.
- Table 4 supports the MCS table of NOMA
- the three items of the index 26-28 in Table 1 with the modulation order of 6 can be deleted, and the three items with the modulation order of 2 can be added. And modify the corresponding transport block size table at the same time.
- Table 5 shows another example of a transport block size table supporting NOMA.
- Table 5 supports the transport block size table of NOMA
- each transport block size corresponding to the I TBS value 24-26 in the transport block size table is modified; wherein each transport block size corresponding to the I TBS value 24-26 is smaller than the I TBS value, respectively. 0 corresponds to each transport block size.
- the MCS table (first table) supporting OFDM and the MCS table (second table) supporting NOMA can be stored on the base station side and the user equipment side, respectively.
- the base station can transmit indication information indicating whether the user equipment uses the NOMA method, and instruct whether to use the first table or the second table.
- the base station needs to use PDCCH signaling or Radio Resource Control (RRC) signaling to notify the user equipment whether it is currently in the NOMA transmission mode.
- RRC Radio Resource Control
- both the user equipment and the base station can agree to use the NOM-specific MCS table, and no additional bit overhead for indicating the MCS is generated at this time.
- the MCS table supporting NOMA is used to select an appropriate modulation mode and code rate; thus, the NOMA signal to interference and noise ratio does not exceed the MCS table range, and the low signal dry noise ratio can be reduced.
- the block error rate improves the throughput of the NOMA system.
- the embodiment of the invention provides an information transmission method, which is applied to a user equipment of a NOMA system.
- the same contents as in Embodiment 1 will not be described again.
- FIG. 2 is a schematic diagram of an information transmission method according to an embodiment of the present invention. As shown in FIG. 2, the information transmission method includes:
- Step 201 the user equipment feeds back to the base station the CQI generated according to the OFDM signal to interference and noise ratio;
- Step 202 The user equipment receives data sent by the base station.
- Step 203 The user equipment selects an appropriate modulation mode and code rate from the MCS table supporting the NOMA, and demodulates the data.
- the NOMA-enabled MCS table is formed by using reserved locations in an MCS table that supports OFDM.
- an entry with an index of 29 and reserved for QPSK is used, and the entry reserved for QPSK uses an I TBS value different from other items, such as the I.
- the TBS value is 27.
- the I TBS value and the corresponding transport block size are added to the transport block size table.
- the transport block sizes corresponding to the I TBS values are respectively smaller than the transport block sizes corresponding to the I TBS value of 0.
- a dedicated MCS table can be defined for NOMA transmissions.
- the NOMA-enabled MCS table may be formed by deleting a part of the high order term and adding a part of the low order term in the OFDM-supporting MCS table.
- the number of rows of the MCS table supporting the NOMA is less than or equal to the number of rows of the MCS table supporting the OFDM.
- the MCS table (first table) supporting OFDM and the MCS table (second table) supporting NOMA can be stored on the base station side and the user equipment side, respectively.
- the user equipment may receive the indication information sent by the base station, where the indication information is used to indicate whether the user equipment uses the NOMA mode; and the user equipment uses the CNS supporting the NOMA in the case that the NOMA mode is used.
- Table in the case where the NOMA method is not used, the MCS table supporting OFDM is used.
- the MCS table supporting NOMA is used to select an appropriate modulation mode and code rate; thus, the NOMA signal to interference and noise ratio does not exceed the MCS table range, and the low signal dry noise ratio can be reduced.
- the block error rate improves the throughput of the NOMA system.
- An embodiment of the present invention provides an information transmission apparatus, which is configured in a base station of a NOMA system.
- the embodiment of the present invention corresponds to the information transmission method in Embodiment 1, and the same content is not described herein again.
- FIG. 3 is a schematic diagram of an information transmission apparatus according to an embodiment of the present invention. As shown in FIG. 3, the information transmission apparatus 300 includes:
- the receiving unit 301 receives a CQI fed back by the user equipment, where the CQI is generated by the user equipment according to an OFDM signal to interference and noise ratio;
- the signal to interference and noise ratio calculation unit 302 calculates a NOMA signal to interference and noise ratio according to the CQI;
- the data modulating unit 303 searches for the MCS table supporting the NOMA according to the NOMA signal to interference and noise ratio, selects an appropriate modulation mode and code rate according to the search result, and modulates the data to be sent;
- the data transmitting unit 304 transmits the modulated data to the user equipment.
- the information transmission device 300 may further include:
- the storage unit 305 stores the MCS table supporting the NOMA.
- the NOMA-enabled MCS table is formed by using reserved locations in an MCS table that supports OFDM.
- an entry with an index of 29 and reserved for QPSK is used, and the entry reserved for QPSK uses an I TBS value different from other items, such as the I.
- the TBS value is 27.
- the I TBS value and the corresponding transport block size are added to the transport block size table.
- the transport block sizes corresponding to the I TBS values are respectively smaller than the transport block sizes corresponding to the I TBS value of 0.
- the NOMA-enabled MCS table is formed by deleting a portion of the high order term in the MCS table of the OFDM and adding a portion of the low order term.
- the number of rows of the NOMA-enabled MCS table is less than or equal to the number of rows of the MCS table supporting the OFDM.
- the storage unit 403 may further store an MCS table supporting OFDM.
- the information transmission apparatus 300 may further include: an information sending unit, configured to send indication information indicating whether the user equipment uses the NOMA access mode; and the modulating unit 302 is further configured to be used when the NOMA mode is used.
- the NOMA-supporting MCS table is used; in the case where the NOMA method is not used, the OFDM-supporting MCS table is used.
- the embodiment further provides a base station configured with the information transmission device 300 as described above.
- FIG. 4 is a schematic diagram of a structure of a base station according to an embodiment of the present invention.
- base station 400 can include a central processing unit (CPU) 200 and memory 210; and memory 210 is coupled to central processing unit 200.
- the memory 210 can store various data; in addition, a program for information processing is stored, and the program is executed under the control of the central processing unit 200.
- the base station 400 can implement the information transmission method as described in Embodiment 1.
- the central processing unit 200 can be configured to implement the functions of the information transmission device 300; that is, the central processing unit 200 can be configured to perform control of receiving a CQI fed back by the user equipment; wherein the CQI is the user equipment according to OFDM signal dry noise Generating a NOMA signal to interference and noise ratio according to the CQI, and searching for a NOM-enabled MCS table according to the NOMA signal to interference and noise ratio, selecting an appropriate modulation mode and code rate according to the search result, and modulating the data to be transmitted; Transmitting the modulated data to the user equipment.
- the base station 400 may further include: a transceiver 220, an antenna 230, and the like; wherein the functions of the foregoing components are similar to those of the prior art, and details are not described herein again. It is worth noting that the base station 400 is not necessarily It is necessary to include all of the components shown in FIG. 4; in addition, the base station 400 may also include components not shown in FIG. 4, and reference may be made to the prior art.
- the MCS table supporting NOMA is used to select an appropriate modulation mode and code rate; thus, the NOMA signal to interference and noise ratio does not exceed the MCS table range, and the low signal dry noise ratio can be reduced.
- the block error rate improves the throughput of the NOMA system.
- the embodiment of the invention provides an information transmission device, which is configured in a user equipment of the NOMA system.
- the embodiment of the present invention corresponds to the information transmission method in Embodiment 2, and the same content is not described again.
- FIG. 5 is a schematic diagram of an information transmission apparatus according to an embodiment of the present invention. As shown in FIG. 5, the information transmission apparatus 500 includes:
- the data receiving unit 502 receives the data sent by the base station
- the data demodulating unit 503 selects an appropriate modulation scheme and code rate from the MCS table supporting NOMA, and demodulates the data.
- the information transmission device 500 may further include:
- the storage unit 504 stores the MCS table supporting the NOMA.
- the NOMA-enabled MCS table is formed by using reserved locations in an MCS table that supports OFDM.
- an entry with an index of 29 and reserved for QPSK is used, and the entry reserved for QPSK uses an I TBS value different from other items, such as the I.
- the TBS value is 27.
- the I TBS value and the corresponding transport block size are added to the transport block size table.
- the transport block sizes corresponding to the I TBS values are respectively smaller than the transport block sizes corresponding to the I TBS value of 0.
- the NOMA-enabled MCS table is formed by deleting a portion of the high order term and adding a portion of the low order term in the MCS table of the OFDM.
- the number of rows of the NOMA-enabled MCS table is less than or equal to the number of rows of the MCS table supporting the OFDM.
- the storage unit 403 may further store an MCS table supporting OFDM.
- the information transmission device 500 may further include: an information receiving unit, configured to receive the indication information sent by the base station, where the indication information is used to indicate whether the user equipment uses the NOMA mode; and the data demodulation unit 503 is further configured to: In the case where the NOMA mode is used, the NOMA-supporting MCS table is used; in the NOMA In the case where the mode is not used, the MCS table supporting OFDM is used.
- the embodiment of the invention further provides a user equipment, which is provided with the information transmission device 500 as described above.
- FIG. 6 is a schematic diagram of a user equipment according to an embodiment of the present invention.
- the user device 600 can include a central processing unit 100 and a memory 140; the memory 140 is coupled to the central processing unit 100.
- the figure is exemplary; other types of structures may be used in addition to or in place of the structure to implement telecommunications functions or other functions.
- the functionality of the information transfer device 500 can be integrated into the central processor 100.
- the central processing unit 100 may be configured to perform control of: feeding back a CQI generated according to an OFDM signal to interference and noise ratio to the base station; receiving data transmitted by the base station; and selecting an appropriate modulation mode and code from the MCS table supporting the NOMA. Rate, and demodulate the data.
- the information transmission device 500 can be configured separately from the central processing unit 100.
- the information transmission device 500 can be configured as a chip connected to the central processing unit 100, and the information transmission device 500 can be implemented by control of the central processing unit. The function.
- the user equipment 600 may further include: a communication module 110, an input unit 120, an audio processing unit 130, a memory 140, a camera 150, a display 160, and a power source 170.
- a communication module 110 the functions of the above components are similar to those of the prior art, and are not described herein again. It should be noted that the user equipment 600 does not have to include all the components shown in FIG. 6, and the above components are not required; in addition, the user equipment 600 may further include components not shown in FIG. There are technologies.
- the MCS table supporting NOMA is used to select an appropriate modulation mode and code rate; thus, the NOMA signal to interference and noise ratio does not exceed the MCS table range, and the low signal dry noise ratio can be reduced.
- the block error rate improves the throughput of the NOMA system.
- FIG. 7 is a schematic diagram of a communication system according to an embodiment of the present invention.
- the communication system 700 includes: a base station 701 and a user equipment 702;
- the base station 701 receives the CQI fed back by the user equipment 702, calculates the NOMA signal to interference and noise ratio according to the CQI, and searches for the MCS table supporting the NOMA according to the NOMA signal to interference and noise ratio, and selects an appropriate modulation mode and code rate according to the search result. And modulating the transmitted data; and transmitting the modulated to the user equipment 702 data;
- the user equipment 702 feeds back the CQI to the base station, where the CQI is generated by the user equipment according to an OFDM signal to interference and noise ratio; receiving data sent by the base station, and selecting an appropriate modulation mode from the MCS table supporting the NOMA And the code rate, and demodulating the data.
- the NOMA-enabled MCS table is formed by using a reserved location in an MCS table supporting OFDM;
- the NOMA-enabled MCS table is formed by deleting a part of the high-order term and adding a part of the low-order term in the OFDM-supporting MCS table.
- An embodiment of the present invention provides a computer readable program, wherein when the program is executed in a base station, the program causes a computer to execute the information transmission method as described in Embodiment 1 in the base station.
- An embodiment of the present invention provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute the information transmission method as described in Embodiment 1 in a base station.
- An embodiment of the present invention provides a computer readable program, wherein when the program is executed in a user equipment, the program causes a computer to execute the information transmission method as described in Embodiment 2 in the user equipment.
- An embodiment of the present invention provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute the information transmission method as described in Embodiment 2 in a user equipment.
- the above apparatus and method of the present invention may be implemented by hardware or by hardware in combination with software.
- the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps.
- the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.
- One or more of the functional blocks described in the figures and/or one or more combinations of functional blocks may be implemented as a general purpose processor, digital signal processor (DSP) for performing the functions described herein.
- DSP digital signal processor
- ASIC application specific integrated circuit
- FPGA field programmable gate array
- One or more of the functional blocks described with respect to the figures and/or one or more combinations of functional blocks may also be implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, multiple microprocessors One or more microprocessors in conjunction with DSP communication or any other such configuration.
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Abstract
一种信息传输方法、装置以及通信系统。所述信息传输方法包括:基站接收用户设备反馈的CQI;其中所述CQI是所述用户设备根据OFDM信干噪比而生成;根据所述CQI计算NOMA信干噪比,并根据所述NOMA信干噪比查找支持NOMA的MCS表,根据查找结果选择合适的调制方式和码率并对待发送数据进行调制;以及向所述用户设备发送调制后的数据。由此,不会出现NOMA信干噪比超出MCS表范围的情况,能够降低低信干噪比条件下的误块率,提高NOMA系统的吞吐量。
Description
本发明涉及通信技术领域,特别涉及一种非正交多址接入(NOMA,Non-Orthogonal Multiple Access)的信息传输方法、装置以及通信系统。
业务需求持续推动着历代移动通信系统的发展与更替。目前第四代(4G)移动通信系统的标准化工作尚未完成,而第五代(5G)移动通信技术的理论研究工作已经逐渐展开。5G通信系统的需求之一是支持比4G更高的系统容量(例如1000倍)以及比4G更多的终端连接数目(例如100倍)。
之前历代移动通信均采用正交多址技术,研究表明,非正交多址技术能够实现比正交多址技术更大的容量域,这一理论指导使得非正交多址技术成为5G研究的关键技术之一。实现非正交的方式之一是功率域非正交,其代表性技术NOMA目前已经被纳入LTE-A Release 13的讨论范围。
NOMA技术基于叠加码理论,发送端发送叠加符号,接收端需要使用串行干扰删除(SIC,Successive Interference Cancel)技术分离并恢复数据信息。对于发送端使用单天线的情形,NOMA技术理论上能够实现下行广播信道和上行多址信道的全部容量域。
下面以两用户设备下行信道为例,分别给出正交方式与非正交方式的收发模型。假设基站、用户设备均使用单天线,用户设备1位于小区中心,所经历信道表示为h1,噪声表示为n1;用户设备2位于小区边缘,所经历信道表示为h2,噪声表示为n2。基站发送符号s1给用户设备1,发送符号s2给用户设备2,基站总功率为P。
对于正交方式,例如基站使用不同的时间或频率资源发送用户设备1和用户设备2的符号,则用户设备1、用户设备2的接收符号可分别表示为
对于正交方式,用户设备独立解调自身数据符号。
对于非正交方式,基站为不同的符号分配不同的功率,使用相同的时频资源发送一个功率域上的叠加符号。
对于非正交方式,小区边缘用户设备2独立解调自身符号s2,小区中心用户设备1需要使用串行干扰删除解调自身符号s1。对于用户设备1,由于其具有比小区边缘用户设备2更好的信道条件,因此也能够解调符号s2,在解调出s2后进行干扰删除,去除s2的干扰,干扰删除后得到中间结果进而基于该结果解调自身符号s1。
应该注意,上面对技术背景的介绍只是为了方便对本发明的技术方案进行清楚、完整的说明,并方便本领域技术人员的理解而阐述的。不能仅仅因为这些方案在本发明的背景技术部分进行了阐述而认为上述技术方案为本领域技术人员所公知。
发明内容
但是,发明人发现,由于NOMA技术对功率进行了拆分,信干噪比(SINR,Signal to Interference plus Noise Ratio)分布发生改变,并可能出现NOMA信干噪比超出现有标准中调制编码方案(MCS,Modulation and Coding Scheme)表范围的情况,造成码块传输错误,最终对NOMA吞吐量性能产生影响。
本发明实施例提供一种NOMA的信息传输方法、装置以及通信系统。使用支持NOMA的MCS表来选择合适的调制方式和码率。
根据本发明实施例的第一个方面,提供一种信息传输方法,应用于NOMA系统的基站中,所述信息传输方法包括:
接收用户设备反馈的CQI;其中所述CQI是所述用户设备根据OFDM信干噪比而生成;
根据所述CQI计算NOMA信干噪比;
根据所述NOMA信干噪比查找支持NOMA的MCS表,根据查找结果选择合适的调制方式和码率并对待发送数据进行调制;
向所述用户设备发送调制后的数据。
根据本发明实施例的第二个方面,提供一种信息传输装置,配置于NOMA系统的基站中,所述信息传输装置包括:
指示接收单元,接收用户设备反馈的CQI;其中所述CQI是所述用户设备根据OFDM信干噪比而生成;
信干噪比计算单元,根据所述CQI计算NOMA信干噪比;
数据调制单元,根据所述NOMA信干噪比查找支持NOMA的MCS表,根据查找结果选择合适的调制方式和码率并对待发送数据进行调制;
数据发送单元,向所述用户设备发送调制后的数据。
根据本发明实施例的第三个方面,提供一种信息传输方法,应用于NOMA系统的用户设备中,所述信息传输方法包括:
向基站反馈根据OFDM信干噪比而生成的CQI;
接收所述基站发送的数据;
从支持NOMA的MCS表中选择合适的调制方式和码率,并对所述数据进行解调。
根据本发明实施例的第四个方面,提供一种信息传输装置,配置于NOMA系统的用户设备中,所述信息传输装置包括:
指示发送单元,向基站反馈根据OFDM信干噪比而生成的CQI;
数据接收单元,接收所述基站发送的数据;
数据解调单元,从支持NOMA的MCS表中选择合适的调制方式和码率,以及对所述数据进行解调。
根据本发明实施例的第五个方面,提供一种通信系统,使用NOMA,所述通信系统包括:
基站,接收用户设备反馈的CQI;根据所述CQI计算NOMA信干噪比;根据所述NOMA信干噪比查找支持NOMA的MCS表,根据查找结果选择合适的调制方式和码率并对待发送数据进行调制;以及向所述用户设备发送调制后的数据;
用户设备,向所述基站反馈根据OFDM信干噪比而生成的所述CQI;接收所述
基站发送的数据,从支持NOMA的MCS表中选择合适的调制方式和码率,以及对所述数据进行解调。
根据本发明实施例的又一个方面,提供一种计算机可读程序,其中当在基站中执行所述程序时,所述程序使得计算机在所述基站中执行如上所述的信息传输方法。
根据本发明实施例的又一个方面,提供一种存储有计算机可读程序的存储介质,其中所述计算机可读程序使得计算机在基站中执行如上所述信息传输方法。
根据本发明实施例的又一个方面,提供一种计算机可读程序,其中当在用户设备中执行所述程序时,所述程序使得计算机在所述用户设备中执行如上所述的信息传输方法。
根据本发明实施例的又一个方面,提供一种存储有计算机可读程序的存储介质,其中所述计算机可读程序使得计算机在用户设备中执行如上所述信息传输方法。
本发明实施例的有益效果在于,使用支持NOMA的MCS表来选择合适的调制方式和码率;由此,不会出现NOMA信干噪比超出MCS表范围的情况,能够降低低信干噪比条件下的误块率,提高NOMA系统的吞吐量。
参照后文的说明和附图,详细公开了本发明的特定实施方式,指明了本发明的原理可以被采用的方式。应该理解,本发明的实施方式在范围上并不因而受到限制。在所附权利要求的精神和条款的范围内,本发明的实施方式包括许多改变、修改和等同。
针对一种实施方式描述和/或示出的特征可以以相同或类似的方式在一个或更多个其它实施方式中使用,与其它实施方式中的特征相组合,或替代其它实施方式中的特征。
应该强调,术语“包括/包含”在本文使用时指特征、整件、步骤或组件的存在,但并不排除一个或更多个其它特征、整件、步骤或组件的存在或附加。
参照以下的附图可以更好地理解本发明的很多方面。附图中的部件不是成比例绘制的,而只是为了示出本发明的原理。为了便于示出和描述本发明的一些部分,附图中对应部分可能被放大或缩小。
在本发明的一个附图或一种实施方式中描述的元素和特征可以与一个或更多个其它附图或实施方式中示出的元素和特征相结合。此外,在附图中,类似的标号表示
几个附图中对应的部件,并可用于指示多于一种实施方式中使用的对应部件。
图1是本发明实施例1的信息传输方法的一示意图;
图2是本发明实施例2的信息传输方法的一示意图;
图3是本发明实施例3的信息传输装置的一示意图;
图4是本发明实施例3的基站的一示意图;
图5是本发明实施例4的信息传输装置的一示意图;
图6是本发明实施例4的用户设备的一示意图;
图7是本发明实施例5的通信系统的一示意图。
参照附图,通过下面的说明书,本发明的前述以及其它特征将变得明显。在说明书和附图中,具体公开了本发明的特定实施方式,其表明了其中可以采用本发明的原则的部分实施方式,应了解的是,本发明不限于所描述的实施方式,相反,本发明包括落入所附权利要求的范围内的全部修改、变型以及等同物。
对于4G LTE、LTE-A系统,基站根据用户设备反馈的信道质量指示(CQI,Channel Quality Indicator)查找MCS表,从而选择适合当前信道的调制方式和码率进行数据传输;其中,CQI对应于用户设备的SINR,MCS表匹配于正交频分复用(OFDM,Orthogonal Frequency Division Multiplexing)方式下的典型信干噪比分布。
相比OFDM方式,NOMA技术带来的频谱效率提升来源于用户设备可以持续使用全部时频资源,然而由于NOMA技术对功率进行了拆分,每次信道使用中用户设备的SINR相比正交情况也有所下降,此时SINR分布发生改变,并可能出现NOMA SINR超出现有标准中MCS表范围的情况,造成码块传输错误,最终对NOMA吞吐量性能产生影响。
以下对本发明实施例进行说明。
实施例1
本发明实施例提供一种信息传输方法,应用于NOMA系统的基站中。
图1是本发明实施例的信息传输方法的一示意图,如图1所示,所述信息传输方法包括:
步骤101,基站接收用户设备反馈的CQI;其中所述CQI是所述用户设备根据OFDM信干噪比而生成;
步骤102,根据所述CQI计算NOMA信干噪比;
步骤103,基站根据所述NOMA信干噪比查找支持NOMA的MCS表,根据查找结果选择合适的调制方式和码率并对待发送数据进行调制;
步骤104,基站向所述用户设备发送调制后的数据。
在步骤102中,关于如何根据CQI计算NOMA SINR的方法可以参考相关技术。
在一个实施方式中,所述支持NOMA的MCS表通过使用支持OFDM的MCS表中的预留位置而形成。
例如,所述支持NOMA的MCS表中,索引(index)为29并且为正交相移键控(QPSK,Quadrature Phase Shift Keying)预留的项被使用,所述索引为29且为QPSK预留的项使用与其他各项不同的传输块尺寸索引(ITBS)值。
现有物理层标准中定义的MCS表(即支持OFDM的MCS表)如表1所示。
表1 支持OFDM的MCS表
在使用NOMA后,用户设备的SINR发生下降,如果SINR降至更低水平,将会超出表1中最低的MCS索引的适用范围,此时即使使用最低MCS索引指示的调制方式及码率进行传输,仍然不能够保证接收端以0.1的误块率进行可靠接收。
在本实施方式中,可以通过为表1增加若干供低SINR使用的MCS,来使MCS与NOMA SINR重新得到匹配。其中,可以重用表1中的预留位置。
例如可以重用“MCS index 29”所在的行,由于该行原本为QPSK调制方式预留,只需为其指定与表1中各行不同的ITBS值,例如ITBS=27;同时在决定传输块尺寸的查找表中增设一行由ITBS=27索引的传输块尺寸。
表2是支持NOMA的MCS表的一个示例。
表2 支持NOMA的MCS表
此外,在传输块尺寸表中增加所述ITBS值以及对应的各传输块尺寸;其中,所述ITBS值对应的各传输块尺寸分别小于ITBS值为0时对应的各传输块尺寸。表3示出了支持NOMA的传输块尺寸表的一个示例。如表3所示,表3仅截取至NPRB=10作为示意,对于NPRB取值从1到100,均需要增加一栏对应于ITBS=27的传输块尺寸取值,该传输块尺寸的确定旨在获得更低的码率,因此将小于同列中ITBS=0对应的传输块尺寸。
表3支持NOMA的传输块尺寸表
在本实施方式中,由于重用支持OFDM的MCS表中的预留位,因此不会增加物理下行控制信道(PDCCH,Physical Downlink Control Channel)信令中用于指示MCS的比特数,即不会增加物理层信令的开销。
在另一个实施方式中,可以为NOMA传输定义专用的MCS表。其中,可以通过在所述支持OFDM的MCS表中删除部分高阶项并增加部分低阶项,而形成所述支持NOMA的MCS表。
在本实施方式中,由于NOMA SINR在原有基础上降低,在向NOMA用户设备传输数据时,表1中的一些高调制阶数的MCS将不会被使用,因此可以在表1中删除一些高阶的MCS,同时添加进一些新的低阶的MCS,得到新的支持NOMA的MCS表。
其中,所述支持NOMA的MCS表的行数小于或等于所述支持OFDM的MCS表的行数。即删除和添加需要满足“新表行数不超过原表行数”这一准则,从而在指示MCS时无需额外的信令比特开销。
表4是支持NOMA的MCS表的另一示例。
表4支持NOMA的MCS表
如表4所示,可以将表1中索引26-28的调制阶数为6的三项删除,增加调制阶数为2的三项。并且同时修改对应的传输块尺寸表。
表5示出了支持NOMA的传输块尺寸表的另一示例。
表5支持NOMA的传输块尺寸表
如表5所示,在传输块尺寸表中ITBS值24-26所对应的各传输块尺寸被修改;其中,所述ITBS值24-26对应的各传输块尺寸分别小于ITBS值为0时对应的各传输块尺寸。
在本实施例中,可以在基站侧和用户设备侧分别存储支持OFDM的MCS表(第1表)以及支持NOMA的MCS表(第2表)。由此,基站可以发送用于指示所述用户设备是否使用NOMA方式的指示信息,指示使用该第1表还是使用第2表。
在具体实施时,基站需要事先使用PDCCH信令或无线资源控制(RRC,Radio Resource Control)信令通知用户设备当前是否处于NOMA传输模式。当被配置为NOMA传输模式后,用户设备和基站双方即可以约定使用NOMA专用的MCS表,此时不会产生额外的用于指示MCS的比特开销。
由上述实施例可知,使用支持NOMA的MCS表来选择合适的调制方式和码率;由此,不会出现NOMA信干噪比超出MCS表范围的情况,能够降低低信干噪比条件下的误块率,提高NOMA系统的吞吐量。
实施例2
本发明实施例提供一种信息传输方法,应用于NOMA系统的用户设备中。与实施例1中相同的内容不再赘述。
图2是本发明实施例的信息传输方法的一示意图,如图2所示,所述信息传输方法包括:
步骤201,用户设备向基站反馈根据OFDM信干噪比而生成的CQI;
步骤202,用户设备接收所述基站发送的数据;
步骤203,用户设备从支持NOMA的MCS表中选择合适的调制方式和码率,以及对所述数据进行解调。
在一个实施方式中,所述支持NOMA的MCS表通过使用支持OFDM的MCS表中的预留位置而形成。
例如,所述支持NOMA的MCS表中,索引为29且为QPSK预留的项被使用,所述索引为29且为QPSK预留的项使用与其他各项不同的ITBS值,例如该ITBS值为27。其中,在传输块尺寸表中增加所述ITBS值以及对应的各传输块尺寸;所述ITBS值对应的各传输块尺寸分别小于ITBS值为0时对应的各传输块尺寸。
在另一个实施方式中,可以为NOMA传输定义专用的MCS表。可以通过在所述支持OFDM的MCS表中删除部分高阶项并增加部分低阶项,而形成所述支持NOMA的MCS表。其中,所述支持NOMA的MCS表的行数小于或等于所述支持OFDM的MCS表的行数。
在本实施例中,可以在基站侧和用户设备侧分别存储支持OFDM的MCS表(第1表)以及支持NOMA的MCS表(第2表)。用户设备可以接收所述基站发送的指示信息,所述指示信息用于指示所述用户设备是否使用NOMA方式;所述用户设备在所述NOMA方式被使用的情况下,使用所述支持NOMA的MCS表;在所述NOMA方式不被使用的情况下,使用所述支持OFDM的MCS表。
由上述实施例可知,使用支持NOMA的MCS表来选择合适的调制方式和码率;由此,不会出现NOMA信干噪比超出MCS表范围的情况,能够降低低信干噪比条件下的误块率,提高NOMA系统的吞吐量。
实施例3
本发明实施例提供一种信息传输装置,配置于NOMA系统的基站中。本发明实施例对应于实施例1中的信息传输方法,相同的内容不再赘述。
图3是本发明实施例的信息传输装置的一示意图,如图3所示,所述信息传输装置300包括:
指示接收单元301,接收用户设备反馈的CQI;其中所述CQI是所述用户设备根据OFDM信干噪比而生成;
信干噪比计算单元302,根据所述CQI计算NOMA信干噪比;
数据调制单元303,根据所述NOMA信干噪比查找支持NOMA的MCS表,根据查找结果选择合适的调制方式和码率并对待发送数据进行调制;
数据发送单元304,向所述用户设备发送调制后的数据。
如图3所示,所述信息传输装置300还可以包括:
存储单元305,存储所述支持NOMA的MCS表。
在一个实施方式中,所述支持NOMA的MCS表通过使用支持OFDM的MCS表中的预留位置而形成。
例如,所述支持NOMA的MCS表中,索引为29且为QPSK预留的项被使用,所述索引为29且为QPSK预留的项使用与其他各项不同的ITBS值,例如该ITBS值为27。其中,在传输块尺寸表中增加所述ITBS值以及对应的各传输块尺寸;其中,所述ITBS值对应的各传输块尺寸分别小于ITBS值为0时对应的各传输块尺寸。
在另一个实施方式中,其中,通过在所述OFDM的MCS表中删除部分高阶项并增加部分低阶项,而形成所述支持NOMA的MCS表。所述支持NOMA的MCS表的行数小于或等于所述支持OFDM的MCS表的行数。
在本实施例中,所述存储单元403还可以存储有支持OFDM的MCS表。所述信息传输装置300还可以包括:信息发送单元,发送用于指示所述用户设备是否使用NOMA接入方式的指示信息;所述调制单元302还用于在所述NOMA方式被使用的情况下,使用所述支持NOMA的MCS表;在所述NOMA方式不被使用的情况下,使用所述支持OFDM的MCS表。
本实施例还提供一种基站,配置有如上所述的信息传输装置300。
图4是本发明实施例的基站的一构成示意图。如图4所示,基站400可以包括:中央处理器(CPU)200和存储器210;存储器210耦合到中央处理器200。其中该存储器210可存储各种数据;此外还存储信息处理的程序,并且在中央处理器200的控制下执行该程序。
其中,基站400可以实现如实施例1所述的信息传输方法。中央处理器200可以被配置为实现信息传输装置300的功能;即中央处理器200可以被配置为进行如下控制:接收用户设备反馈的CQI;其中所述CQI是所述用户设备根据OFDM信干噪比而生成;根据所述CQI计算NOMA信干噪比,并根据所述NOMA信干噪比查找支持NOMA的MCS表,根据查找结果选择合适的调制方式和码率并对待发送数据进行调制;以及向所述用户设备发送调制后的数据。
此外,如图4所示,基站400还可以包括:收发机220和天线230等;其中,上述部件的功能与现有技术类似,此处不再赘述。值得注意的是,基站400也并不是必
须要包括图4中所示的所有部件;此外,基站400还可以包括图4中没有示出的部件,可以参考现有技术。
由上述实施例可知,使用支持NOMA的MCS表来选择合适的调制方式和码率;由此,不会出现NOMA信干噪比超出MCS表范围的情况,能够降低低信干噪比条件下的误块率,提高NOMA系统的吞吐量。
实施例4
本发明实施例提供一种信息传输装置,配置于NOMA系统的用户设备中。本发明实施例对应于实施例2中的信息传输方法,相同的内容不再赘述。
图5是本发明实施例的信息传输装置的一示意图,如图5所示,所述信息传输装置500包括:
指示发送单元501,向基站反馈根据OFDM信干噪比而生成的CQI;
数据接收单元502,接收所述基站发送的数据;
数据解调单元503,从支持NOMA的MCS表中选择合适的调制方式和码率,以及对所述数据进行解调。
如图5所示,所述信息传输装置500还可以包括:
存储单元504,存储所述支持NOMA的MCS表。
在一个实施方式中,所述支持NOMA的MCS表通过使用支持OFDM的MCS表中的预留位置而形成。
例如,所述支持NOMA的MCS表中,索引为29且为QPSK预留的项被使用,所述索引为29且为QPSK预留的项使用与其他各项不同的ITBS值,例如该ITBS值为27。其中,在传输块尺寸表中增加所述ITBS值以及对应的各传输块尺寸;其中,所述ITBS值对应的各传输块尺寸分别小于ITBS值为0时对应的各传输块尺寸。
在另一个实施方式中,通过在所述OFDM的MCS表中删除部分高阶项并增加部分低阶项,而形成所述支持NOMA的MCS表。所述支持NOMA的MCS表的行数小于或等于所述支持OFDM的MCS表的行数。
在本实施例中,所述存储单元403还可以存储有支持OFDM的MCS表。所述信息传输装置500还可以包括:信息接收单元,接收所述基站发送的指示信息,所述指示信息用于指示所述用户设备是否使用NOMA方式;所述数据解调单元503还用于:在所述NOMA方式被使用的情况下,使用所述支持NOMA的MCS表;在所述NOMA
方式不被使用的情况下,使用所述支持OFDM的MCS表。
本发明实施例还提供一种用户设备,配置有如上所述的信息传输装置500。
图6是本发明实施例的用户设备的一示意图。如图6所示,该用户设备600可以包括中央处理器100和存储器140;存储器140耦合到中央处理器100。值得注意的是,该图是示例性的;还可以使用其他类型的结构,来补充或代替该结构,以实现电信功能或其他功能。
在一个实施方式中,信息传输装置500的功能可以被集成到中央处理器100中。其中,中央处理器100可以被配置为进行如下控制:向基站反馈根据OFDM信干噪比而生成的CQI;接收所述基站发送的数据;从支持NOMA的MCS表中选择合适的调制方式和码率,以及对所述数据进行解调。
在另一个实施方式中,信息传输装置500可以与中央处理器100分开配置,例如可以将信息传输装置500配置为与中央处理器100连接的芯片,通过中央处理器的控制来实现信息传输装置500的功能。
如图6所示,该用户设备600还可以包括:通信模块110、输入单元120、音频处理单元130、存储器140、照相机150、显示器160、电源170。其中,上述部件的功能与现有技术类似,此处不再赘述。值得注意的是,用户设备600也并不是必须要包括图6中所示的所有部件,上述部件并不是必需的;此外,用户设备600还可以包括图6中没有示出的部件,可以参考现有技术。
由上述实施例可知,使用支持NOMA的MCS表来选择合适的调制方式和码率;由此,不会出现NOMA信干噪比超出MCS表范围的情况,能够降低低信干噪比条件下的误块率,提高NOMA系统的吞吐量。
实施例5
本发明实施例还提供一种使用NOMA的通信系统,与实施例1至4相同的内容不再赘述。图7是本发明实施例的通信系统的一示意图,如图7所示,所述通信系统700包括:基站701和用户设备702;
其中,基站701接收用户设备702反馈的CQI;根据所述CQI计算NOMA信干噪比,并根据所述NOMA信干噪比查找支持NOMA的MCS表,根据查找结果选择合适的调制方式和码率并对待发送数据进行调制;以及向用户设备702发送调制后的
数据;
用户设备702向所述基站反馈所述CQI,其中所述CQI是所述用户设备根据OFDM信干噪比而生成;接收所述基站发送的数据,从支持NOMA的MCS表中选择合适的调制方式和码率,以及对所述数据进行解调。
在一个实施方式中,所述支持NOMA的MCS表通过使用支持OFDM的MCS表中的预留位置而形成;
在另一个实施方式中,所述支持NOMA的MCS表通过在所述支持OFDM的MCS表中删除部分高阶项并增加部分低阶项而形成。
本发明实施例提供一种计算机可读程序,其中当在基站中执行所述程序时,所述程序使得计算机在所述基站中执行如实施例1所述的信息传输方法。
本发明实施例提供一种存储有计算机可读程序的存储介质,其中所述计算机可读程序使得计算机在基站中执行如实施例1所述的信息传输方法。
本发明实施例提供一种计算机可读程序,其中当在用户设备中执行所述程序时,所述程序使得计算机在所述用户设备中执行如实施例2所述的信息传输方法。
本发明实施例提供一种存储有计算机可读程序的存储介质,其中所述计算机可读程序使得计算机在用户设备中执行如实施例2所述的信息传输方法。
本发明以上的装置和方法可以由硬件实现,也可以由硬件结合软件实现。本发明涉及这样的计算机可读程序,当该程序被逻辑部件所执行时,能够使该逻辑部件实现上文所述的装置或构成部件,或使该逻辑部件实现上文所述的各种方法或步骤。本发明还涉及用于存储以上程序的存储介质,如硬盘、磁盘、光盘、DVD、flash存储器等。
针对附图中描述的功能方框中的一个或多个和/或功能方框的一个或多个组合,可以实现为用于执行本申请所描述功能的通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其它可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件或者其任意适当组合。针对附图描述的功能方框中的一个或多个和/或功能方框的一个或多个组合,还可以实现为计算设备的组合,例如,DSP和微处理器的组合、多个微处理器、与DSP通信结合的一个或多个微处理器或者任何其它这种配置。
以上结合具体的实施方式对本发明进行了描述,但本领域技术人员应该清楚,这些描述都是示例性的,并不是对本发明保护范围的限制。本领域技术人员可以根据本
发明的精神和原理对本发明做出各种变型和修改,这些变型和修改也在本发明的范围内。
Claims (20)
- 一种信息传输装置,配置于非正交多址接入即NOMA系统的基站中,所述信息传输装置包括:指示接收单元,接收用户设备反馈的信道质量指示即CQI;其中所述CQI是所述用户设备根据正交频分复用即OFDM信干噪比而生成;信干噪比计算单元,根据所述CQI计算NOMA信干噪比;数据调制单元,根据所述NOMA信干噪比查找支持NOMA的调制编码方案即MCS表,根据查找结果选择合适的调制方式和码率并对待发送数据进行调制;数据发送单元,向所述用户设备发送调制后的数据。
- 根据权利要求1所述的信息传输装置,其中,所述信息传输装置还包括:存储单元,存储所述支持NOMA的MCS表。
- 根据权利要求2所述的信息传输装置,其中,所述支持NOMA的MCS表通过使用支持OFDM的MCS表中的预留位置而形成。
- 根据权利要求3所述的信息传输装置,其中,在所述支持NOMA的MCS表中,索引为29且为正交相移键控预留的项被使用,所述索引为29且为正交相移键控预留的项使用与其他各项不同的传输块尺寸索引值。
- 根据权利要求4所述的信息传输装置,其中,在传输块尺寸表中增加所述传输块尺寸索引值以及对应的各传输块尺寸;其中,所述传输块尺寸索引值对应的各传输块尺寸分别小于传输块尺寸索引值为0时对应的各传输块尺寸。
- 根据权利要求4所述的信息传输装置,其中,所述索引为29且为正交相移键控预留的项所对应的传输块尺寸索引值为27。
- 根据权利要求2所述的信息传输装置,其中,所述支持NOMA的MCS表通过在所述支持OFDM的MCS表中删除部分高阶项并增加部分低阶项而形成;所述支持NOMA的MCS表的行数小于或等于所述支持OFDM的MCS表的行数。
- 根据权利要求2所述的信息传输装置,其中,所述存储单元还存储有支持OFDM的MCS表。
- 根据权利要求8所述的信息传输装置,其中,所述信息传输装置还包括:信息发送单元,发送用于指示所述用户设备是否使用NOMA方式的指示信息;所述数据调制单元在所述NOMA方式被使用的情况下,使用所述支持NOMA的MCS表;在所述NOMA方式不被使用的情况下,使用所述支持OFDM的MCS表。
- 一种信息传输装置,配置于非正交多址接入即NOMA系统的用户设备中,所述信息传输装置包括:指示发送单元,向基站反馈根据OFDM信干噪比而生成的CQI;数据接收单元,接收所述基站发送的数据;数据解调单元,从支持NOMA的MCS表中选择合适的调制方式和码率,以及对所述数据进行解调。
- 根据权利要求10所述的信息传输装置,其中,所述信息传输装置还包括:存储单元,存储所述支持NOMA的MCS表。
- 根据权利要求11所述的信息传输装置,其中,所述支持NOMA的MCS表通过使用支持OFDM的MCS表中的预留位置而形成。
- 根据权利要求12所述的信息传输装置,其中,所述支持NOMA的MCS表中,索引为29且为正交相移键控键控预留的项被使用,所述索引为29且为正交相移键控键控预留的项使用与其他各项不同的传输块尺寸索引值。
- 根据权利要求13所述的信息传输装置,其中,在传输块尺寸表中增加所述传输块尺寸索引值以及对应的各传输块尺寸;其中,所述传输块尺寸索引值对应的各传输块尺寸分别小于传输块尺寸索引值为0时对应的各传输块尺寸。
- 根据权利要求13所述的信息传输装置,其中,所述索引为29且为正交相移键控预留的项所对应的传输块尺寸索引值为27。
- 根据权利要求11所述的信息传输装置,其中,所述支持NOMA的MCS表通过在所述支持OFDM的MCS表中删除部分高阶项并增加部分低阶项而形成;所述支持NOMA的MCS表的行数小于或等于所述支持OFDM的MCS表的行数。
- 根据权利要求11所述的信息传输装置,所述存储单元还存储有所述支持OFDM的MCS表。
- 根据权利要求17所述的信息传输装置,其中,所述信息传输装置还包括:信息接收单元,接收所述基站发送的指示信息,所述指示信息用于指示所述用户设备是否使用NOMA方式;所述数据解调单元在所述NOMA方式被使用的情况下,使用所述支持NOMA的 MCS表;在所述NOMA方式不被使用的情况下,使用所述OFDM的MCS表。
- 一种通信系统,使用非正交多址接入即NOMA,所述通信系统包括:基站,接收用户设备反馈的CQI;根据所述CQI计算NOMA信干噪比,并根据所述NOMA信干噪比查找支持NOMA的MCS表,根据查找结果选择合适的调制方式和码率并对待发送数据进行调制;以及向所述用户设备发送调制后的数据;用户设备,向所述基站反馈根据OFDM信干噪比而生成的所述CQI;接收所述基站发送的数据,从支持NOMA的MCS中选择合适的调制方式和码率,以及对所述数据进行解调。
- 根据权利要求19所述的通信系统,其中,所述支持NOMA的MCS表通过使用支持OFDM的MCS表中的预留位置而形成;或者,所述支持NOMA的MCS表通过在所述OFDM的MCS表中删除部分高阶项并增加部分低阶项而形成。
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