CN108243453B - Downlink data transmission method and device - Google Patents
Downlink data transmission method and device Download PDFInfo
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- CN108243453B CN108243453B CN201611201937.0A CN201611201937A CN108243453B CN 108243453 B CN108243453 B CN 108243453B CN 201611201937 A CN201611201937 A CN 201611201937A CN 108243453 B CN108243453 B CN 108243453B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
Abstract
The invention discloses a downlink data transmission method and device, and relates to the field of wireless communication. The method comprises the following steps: receiving a downlink control signaling of a base station, and acquiring a reference modulation mode aiming at a user; detecting an actual modulation mode of a base station for a transmission signal of a user; judging whether the user is scheduled to be an NOMA transmission mode or an OMA transmission mode according to the reference modulation mode and the actual modulation mode; and processing the signal received by the user according to the judgment result. The method and the device provided by the invention realize the dynamic self-adaptive switching of NOMA and OMA, do not need to add new downlink control signaling, and reduce the control signaling overhead.
Description
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a downlink data transmission method and apparatus.
Background
In the 5G era, the demand for user transmission rate is continuously increasing, and the industry is prompted to explore new wireless technologies for further improving spectrum efficiency. Among them, the NOMA (Non-Orthogonal Multiple Access) technology theoretically can reach the capacity bound of the uplink and downlink channels, and is thus highly regarded by the industry at home and abroad; moreover, the increasing processing capabilities of terminals and base stations have also facilitated the widespread use of NOMA in 5G.
The NOMA technique obtains quasi-orthogonality of multi-user data by deleting interference signals at a receiving end. Therefore, to obtain the gain of NOMA, the user must first know whether there is interference from co-scheduled users, then decide whether to demodulate and delete the interfering user, and finally correctly decode the useful signal. However, in the prior art, a dynamic signaling manner is adopted to notify the user of the information, and a new downlink control signaling needs to be frequently added, so that the overhead of the control signaling is very large.
Disclosure of Invention
The inventors of the present invention have found the problems in the prior art described above, and have thus proposed a new technical solution to at least one of the problems.
An object of the present invention is to provide a downlink data transmission technical solution, which can reduce the overhead of control signaling.
According to a first aspect of the present invention, a downlink data transmission method is provided, including: receiving a downlink control signaling of a base station, and acquiring a reference modulation mode aiming at a user; detecting the actual modulation mode of the base station for the transmission signal of the user; determining whether the user is scheduled to be an NOMA (Orthogonal Multiple Access) transmission mode or an OMA (Orthogonal Multiple Access) transmission mode according to the reference modulation mode and the actual modulation mode; and processing the signal received by the user according to the judgment result.
Optionally, the method further comprises: the terminal receives a semi-static RRC (Radio Resource Control) signaling sent by the base station, and acquires an indication that the user enters the NOMA mode.
Optionally, the determining, according to the reference modulation scheme and the actual modulation scheme, whether the user is scheduled to be an NOMA transmission scheme or an OMA transmission scheme includes: if the reference modulation mode is the same as the actual modulation mode, determining that the user is scheduled as an OMA transmission mode in a current subframe and a current resource block; otherwise, the user is judged to be scheduled to be in a NOMA transmission mode in the current subframe and the current resource block.
Optionally, the processing the signal received by the user according to the determination result includes: if the judgment result is that the user is scheduled to be in an OMA transmission mode, directly decoding a signal received by the user; if the judgment result is that the user is scheduled to be in a NOMA transmission mode, firstly demodulating and deleting the signal sent by the base station to a remote user, and then decoding the signal received by the user.
Optionally, the terminal of the remote user processes a signal sent by the base station to the user as interference, and demodulates the signal received by the remote user in a QPSK (Quadrature Phase Shift keying) manner.
Optionally, the reference modulation scheme for the user includes: according to the channel condition, the reference Modulation mode adopts QPSK, 16QAM (Quadrature Amplitude Modulation) or 64QAM Modulation mode.
Optionally, the actual modulation method of the base station for the transmission signal of the user includes: if the user is scheduled as an OMA transmission mode, the actual modulation mode is the same as the reference modulation mode; and if the user is scheduled to be in a NOMA transmission mode, the base station transmits the composite constellation of the user and the remote user.
Optionally, the sending, by the base station, the composite constellation of the user and the remote user includes: if the reference modulation mode is QPSK, the actual modulation mode is corresponding to 16 QAM; if the reference modulation mode is a 16QAM modulation mode, the actual modulation mode is correspondingly 64 QAM; and if the reference modulation mode is a 64QAM modulation mode, the actual modulation mode is 256QAM correspondingly.
According to another aspect of the present invention, there is provided a downlink data transmission apparatus, including: a modulation mode acquisition unit, configured to detect a downlink control signaling of a base station, acquire a reference modulation mode for a user, and detect an actual modulation mode of a transmission signal of the user by the base station; a transmission scheme determining unit, configured to determine whether the user is scheduled to be an NOMA transmission scheme or an OMA transmission scheme according to the reference modulation scheme and the actual modulation scheme acquired by the modulation scheme acquiring unit; and the received signal processing unit is used for processing the signal received by the user according to the judgment result of the transmission mode judging unit.
Optionally, the apparatus further comprises: a semi-static signaling receiving unit, configured to receive a semi-static RRC signaling sent by the base station, and obtain an indication that the user enters the NOMA mode.
Optionally, the transmission method determining unit includes: a modulation mode comparing subunit, configured to compare, according to an acquisition result of the modulation mode acquiring unit, whether the reference modulation mode and the actual modulation mode are the same; a transmission mode determining subunit, configured to determine that the user is scheduled as an OMA transmission mode in the current subframe and the current resource block if the comparison result of the modulation mode comparison subunit is the same; otherwise, determining that the user is scheduled as NOMA transmission mode in the current subframe and the current resource block.
Optionally, the received signal processing unit includes: a NOMA signal processing subunit, configured to, if the determination result of the transmission mode determination unit is that the user is scheduled as a NOMA transmission mode in the current subframe and the current resource block, demodulate and delete the signal sent by the base station to the remote user first, and then decode the signal received by the user; an OMA signal processing subunit, configured to, if the determination result of the transmission scheme determining unit is that the user is scheduled as an OMA transmission scheme in the current subframe and the current resource block, directly decode a signal received by the user.
Optionally, the apparatus further comprises: and the far-end user signal processing unit is used for processing the signal sent by the base station to the user as interference and demodulating the signal received by the far-end user in a Quadrature Phase Shift Keying (QPSK) mode.
According to another aspect of the present invention, there is also provided a downlink data transmission apparatus, including: a memory; and a processor coupled to the memory, the processor configured to perform the downlink data transmission method as described above based on instructions stored in the memory device.
One advantage of the present invention is that the terminal determines which transmission mode the user is scheduled to by acquiring a reference modulation mode for the user and an actual modulation mode of the base station for the transmission signal of the user, thereby implementing dynamic adaptive switching of NOMA and OMA without adding new downlink control signaling, and reducing control signaling overhead.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
The invention will be more clearly understood from the following detailed description, taken with reference to the accompanying drawings, in which:
fig. 1 is a schematic diagram illustrating an application scenario of a downlink data transmission method according to the present invention.
Fig. 2 shows a flowchart of an embodiment of a downlink data transmission method according to the present invention.
Fig. 3 shows a flowchart of another embodiment of a downlink data transmission method according to the present invention.
Fig. 4 shows a flowchart of another embodiment of a downlink data transmission method according to the present invention.
Fig. 5 is a block diagram showing an embodiment of a downstream data transmission apparatus according to the present invention.
Fig. 6 is a block diagram showing another embodiment of a downstream data transmission apparatus according to the present invention.
Fig. 7 is a block diagram showing still another embodiment of a downstream data transmission apparatus according to the present invention.
Fig. 8 is a block diagram showing still another embodiment of a downstream data transmission apparatus according to the present invention.
Fig. 9 is a block diagram showing still another embodiment of a downstream data transmission apparatus according to the present invention.
Fig. 10 is a block diagram showing an embodiment of a downstream data transmission apparatus according to the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a schematic diagram illustrating an application scenario of a downlink data transmission method according to the present invention.
As shown in fig. 1, a base station 103 serves users 101 and remote users 102 in a cell simultaneously. Wherein, the blank frequency resource block indicates that in the frequency resource block in the subframe, the user 101 is scheduled as an OMA transmission mode, that is, the base station only schedules the user 101; the frequency resource blocks marked with diagonal lines indicate that in the frequency resource block in the subframe, the user 101 is scheduled in the NOMA transmission mode, i.e. the base station 103 schedules the user 101 and the remote user 102 on the same time-frequency-space resource. If the user 101 is scheduled for NOMA transmission, it is necessary to know whether there is interference from co-scheduled users, and then decide whether to demodulate and cancel the interfering user, so that the user's own useful signal can be correctly decoded.
Fig. 2 shows a flowchart of an embodiment of a downlink data transmission method according to the present invention.
As shown in fig. 2, step 201 receives a downlink control signaling of a base station, and acquires a reference modulation scheme for a user. For example, the reference modulation scheme may employ QPSK, 16QAM, or 64QAM according to the channel condition of the user.
In one embodiment, if the user is scheduled as an OMA transmission mode, the actual modulation mode is the same as the reference modulation mode; if the user is scheduled to be the NOMA transmission mode, the base station sends a composite constellation diagram of the user and the remote user, namely if the reference modulation mode is QPSK, the actual modulation mode is corresponding to 16 QAM; if the reference modulation mode is a 16QAM modulation mode, the actual modulation mode is corresponding to 64 QAM; if the reference modulation scheme is a 64QAM modulation scheme, the actual modulation scheme corresponds to 256 QAM.
And step 204, processing the signal received by the user according to the judgment result.
In one embodiment, before performing step 201, the terminal receives a semi-static RRC signaling sent by the base station, and acquires an indication that the user enters the NOMA mode.
In the above embodiment, the terminal may determine which transmission mode the user is scheduled to by comparing the reference modulation mode with the actual modulation mode, without adding any new downlink control signaling; and the base station adopts semi-static RRC signaling to inform the terminal to enter the NOMA mode without dynamic control signaling of a physical layer, thereby reducing signaling overhead.
Fig. 3 shows a flowchart of another embodiment of a downlink data transmission method according to the present invention.
As shown in fig. 3, in step 301, the terminal receives a semi-static RRC signaling sent by the base station, and acquires an indication that the user enters the NOMA mode.
In one embodiment, no matter whether the user is in the NOMA or OMA transmission mode, the remote user treats the signal sent by the base station to the user as interference for processing, and demodulates the signal received by the remote user in the QPSK mode, that is, for the remote user, the signal processing flow is not changed in which transmission mode, and there is no need to define new signaling and receiver.
In the above embodiment, the method provided by the present invention implements NOMA/OMA adaptive dynamic switching according to the difference between the reference modulation mode and the actual modulation mode, without adding any new downlink control signaling, thereby reducing signaling overhead.
Fig. 4 shows a flowchart of another embodiment of a downlink data transmission method according to the present invention.
As shown in fig. 4, in step 401, the terminal receives a semi-static RRC signaling sent by the base station, and acquires an indication that the user enters the NOMA mode.
In step 404, it is determined whether the reference modulation scheme and the actual modulation scheme are the same. If so, determining that the user is scheduled as OMA transmission mode within the current subframe and the current resource block (step 405); if not, then a determination is made that the user is scheduled for NOMA transmission in the current subframe and current resource block (step 406).
In step 407, if the user is scheduled as an OMA transmission mode, the signal received by the user is directly decoded.
In step 408, if the user is scheduled for NOMA transmission, the signal sent by the base station to the remote user is demodulated and deleted, and then the signal received by the user is decoded.
In one embodiment, since the users are scheduled for NOMA transmission, there is a superposition of the signals transmitted by the base station to the users and the remote users in the power domain. The channel condition of the remote user is poor and therefore the power of the signal transmitted by the base station to the remote user is higher than the power of the signal transmitted to the user. Therefore, the user must first demodulate, decode and reconstruct the signal sent by the base station to the remote user, then delete it, and finally decode the signal sent by the base station to the user under the condition of better signal to interference and noise ratio.
In the above embodiment, the method provided by the present invention realizes the adaptive dynamic switching of NOMA/OMA by obtaining the reference modulation mode and the actual modulation mode of the base station for the user, and processes the received signal according to the transmission mode without adding any new downlink control signaling, thereby reducing the signaling overhead.
Fig. 5 is a block diagram showing an embodiment of a downstream data transmission apparatus according to the present invention.
As shown in fig. 5, the apparatus includes: a modulation scheme acquisition unit 51, a transmission scheme determination unit 52, and a received signal processing unit 53.
The modulation scheme obtaining unit 51 detects a downlink control signaling of the base station to obtain a reference modulation scheme for the user, for example, the base station may use QPSK, 16QAM, or 64QAM as the reference modulation scheme according to the channel condition of the user; detecting an actual modulation mode of the base station for a transmission signal of a user, for example, when the base station adopts a single-user orthogonal scheduling user, the actual modulation mode is a reference modulation mode, and when a multi-user non-orthogonal scheduling user is adopted, the base station sends a multi-user synthetic constellation diagram; the transmission scheme determining unit 52 determines whether the user is scheduled as the NOMA transmission scheme or the OMA transmission scheme in the current subframe and the current resource block according to the reference modulation scheme and the actual modulation scheme acquired by the modulation scheme acquiring unit 51; the received signal processing unit 53 processes the signal received by the user according to the judgment result of the transmission scheme judging unit.
In one embodiment, the apparatus further comprises: a semi-static signaling receiving unit 60.
As shown in fig. 6, the semi-static signaling receiving unit 60 receives the semi-static RRC signaling sent by the base station, and obtains an indication that the user enters the NOMA mode.
In the above embodiment, the apparatus provided in the present invention determines, by comparing the reference modulation scheme with the actual modulation scheme, which transmission scheme the user is scheduled in, without adding any new downlink control signaling; and the semi-static signaling receiving unit receives the semi-static RRC signaling to know that the terminal enters the NOMA mode, and the dynamic control signaling of a physical layer is not needed, so that the signaling overhead is reduced.
Fig. 7 is a block diagram showing still another embodiment of a downstream data transmission apparatus according to the present invention.
As shown in fig. 7, the apparatus includes: semi-static signaling receiving section 60, modulation scheme acquiring section 51, transmission scheme determining section 72, and received signal processing section 53. The transmission scheme determining unit 72 includes: a modulation scheme comparison subunit 721 and a transmission scheme determination subunit 722. The functions of the semi-static signaling receiving unit 60, the modulation scheme obtaining unit 51 and the received signal processing unit 53 may refer to the corresponding descriptions of the above embodiments, and are not described herein again for the sake of brevity.
The modulation scheme comparing subunit 721 compares, according to the acquisition result of the modulation scheme acquiring unit 51, whether the reference modulation scheme and the actual modulation scheme are the same; if the comparison result of the modulation scheme comparison subunit 721 is the same, the transmission scheme determining subunit 722 determines that the user is scheduled as an OMA transmission scheme within the current subframe and the current resource block; otherwise, determining that the user is scheduled as NOMA transmission mode in the current subframe and the current resource block.
In the above embodiment, the apparatus provided in the present invention implements NOMA/OMA adaptive dynamic switching according to the difference between the reference modulation scheme and the actual modulation scheme, without adding any new downlink control signaling, thereby reducing signaling overhead.
Fig. 8 is a block diagram showing still another embodiment of a downstream data transmission apparatus according to the present invention.
As shown in fig. 8, the apparatus includes: semi-static signaling receiving section 60, modulation scheme acquiring section 51, transmission scheme determining section 72, and received signal processing section 83. The transmission scheme determining unit 72 includes: a modulation scheme comparison subunit 721 and a transmission scheme determination subunit 722; the received signal processing unit 83 includes: NOMA signal processing subunit 831, OMA signal processing subunit 832. The functions of the semi-static signaling receiving unit 60, the modulation scheme obtaining unit 51, the modulation scheme comparing subunit 721 and the transmission scheme determining subunit 722 may refer to the corresponding descriptions of the above embodiments, and are not described herein again for the sake of brevity.
If the determination result of the transmission mode determining unit 72 is that the user is scheduled as the NOMA transmission mode in the current subframe and the current resource block, the NOMA signal processing subunit 831 first demodulates and deletes the signal sent by the base station to the remote user, and then decodes the signal received by the user, for example, the base station uses the near-far effect among the users to superpose the signals of the users in the power domain at the transmitting end, and the power of the user is lower than that of the remote user, so that the receiving end can distinguish the signals of different users through serial interference deletion, that is, the signals of the remote user are first demodulated, decoded and reconstructed, and then deleted, and then the signals of the user are decoded under the condition of better signal-to-interference-noise ratio; the OMA signal processing sub-unit 832 directly decodes a signal received by the user if the determination result of the transmission scheme determining unit 72 is that the user is scheduled as an OMA transmission scheme within the current subframe and the current resource block.
In one embodiment, the apparatus further comprises a remote user signal processing unit 94.
As shown in fig. 9, although the received signal of the far-end user has signal interference transmitted to the near-end user by the base station, the power of the signal transmitted to the near-end user by the base station is lower than the power of the signal transmitted to the far-end user by the base station, and there is no significant performance impact on the far-end user processing the received signal, therefore, the far-end user signal processing unit 94 processes the signal sent by the base station to the near-end user as interference, and demodulates the signal received by the far-end user in the quadrature phase shift keying QPSK manner.
In the above embodiment, the apparatus provided in the present invention implements adaptive dynamic switching of NOMA/OMA by obtaining a reference modulation scheme and an actual modulation scheme of a base station for a user, and processes a received signal according to a transmission scheme without adding any new downlink control signaling, thereby reducing signaling overhead.
Fig. 10 is a block diagram showing an embodiment of a downstream data transmission apparatus according to the present invention.
As shown in fig. 10, the apparatus 100 of this embodiment includes: a memory 110 and a processor 120 coupled to the memory 110, wherein the processor 120 is configured to execute a downlink data transmission method according to any embodiment of the present invention based on instructions stored in the memory 110.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
So far, the downlink data transmission method and apparatus according to the present invention have been described in detail. Some details well known in the art have not been described in order to avoid obscuring the concepts of the present invention. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
The method and system of the present invention may be implemented in a number of ways. For example, the methods and systems of the present invention may be implemented in software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order for the steps of the method is for illustrative purposes only, and the steps of the method of the present invention are not limited to the order specifically described above unless specifically indicated otherwise. Furthermore, in some embodiments, the present invention may also be embodied as a program recorded in a recording medium, the program including machine-readable instructions for implementing a method according to the present invention. Thus, the present invention also covers a recording medium storing a program for executing the method according to the present invention.
Although some specific embodiments of the present invention have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for the purpose of illustration and is not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A downlink data transmission method is characterized by comprising the following steps:
receiving a downlink control signaling of a base station, and acquiring a reference modulation mode aiming at a user;
detecting the actual modulation mode of the base station for the transmission signal of the user;
determining whether the user is scheduled to be a non-orthogonal multiple access (NOMA) transmission scheme or an Orthogonal Multiple Access (OMA) transmission scheme according to the reference modulation scheme and the actual modulation scheme;
processing the signal received by the user according to the judgment result;
wherein the determining whether the user is scheduled as a NOMA transmission scheme or an Orthogonal Multiple Access (OMA) transmission scheme according to the reference modulation scheme and the actual modulation scheme comprises:
if the reference modulation mode is the same as the actual modulation mode, determining that the user is scheduled as an OMA transmission mode in a current subframe and a current resource block;
otherwise, judging that the user is scheduled to be in a NOMA transmission mode in the current subframe and the current resource block;
the processing the signal received by the user according to the judgment result comprises:
if the judgment result is that the user is scheduled to be in an OMA transmission mode, directly decoding a signal received by the user;
if the judgment result is that the user is scheduled to be in a NOMA transmission mode, firstly demodulating and deleting the signal sent by the base station to a remote user, and then decoding the signal received by the user.
2. The method of claim 1, further comprising: and the terminal receives the semi-static Radio Resource Control (RRC) signaling sent by the base station and acquires the indication that the user enters the NOMA mode.
3. The method of claim 1, further comprising: and the terminal of the far-end user takes the signal sent to the user by the base station as interference for processing, and demodulates the signal received by the far-end user in a Quadrature Phase Shift Keying (QPSK) mode.
4. The method according to any of claims 1-3, wherein the reference modulation scheme for the user comprises:
according to the channel condition, the reference modulation mode adopts QPSK, 16 Quadrature Amplitude Modulation (QAM) or 64 QAM.
5. The method of claim 4, wherein the actual modulation scheme of the base station for the user's transmitted signal comprises:
if the user is scheduled as an OMA transmission mode, the actual modulation mode is the same as the reference modulation mode;
and if the user is scheduled to be in a NOMA transmission mode, the base station transmits the composite constellation of the user and the remote user.
6. The method of claim 5, wherein the base station transmitting the composite constellation of the user and the remote user comprises:
if the reference modulation mode is QPSK, the actual modulation mode is corresponding to 16 QAM;
if the reference modulation mode is a 16QAM modulation mode, the actual modulation mode is correspondingly 64 QAM;
and if the reference modulation mode is a 64QAM modulation mode, the actual modulation mode is 256QAM correspondingly.
7. A downlink data transmission apparatus, comprising:
a modulation mode acquisition unit, configured to detect a downlink control signaling of a base station, acquire a reference modulation mode for a user, and detect an actual modulation mode of a transmission signal of the user by the base station;
a transmission scheme determining unit, configured to determine whether the user is scheduled to be an NOMA transmission scheme or an OMA transmission scheme according to the reference modulation scheme and the actual modulation scheme acquired by the modulation scheme acquiring unit;
a received signal processing unit, configured to process the signal received by the user according to the determination result of the transmission mode determination unit;
the transmission method determination unit includes:
a modulation mode comparing subunit, configured to compare, according to an acquisition result of the modulation mode acquiring unit, whether the reference modulation mode and the actual modulation mode are the same;
a transmission mode determining subunit, configured to determine that the user is scheduled as an OMA transmission mode in the current subframe and the current resource block if the comparison result of the modulation mode comparison subunit is the same; otherwise, determining that the user is scheduled to be in a NOMA transmission mode in the current subframe and the current resource block;
the received signal processing unit includes:
a NOMA signal processing subunit, configured to, if the determination result of the transmission mode determination unit is that the user is scheduled as a NOMA transmission mode in the current subframe and the current resource block, demodulate and delete the signal sent by the base station to the remote user first, and then decode the signal received by the user;
an OMA signal processing subunit, configured to, if the determination result of the transmission scheme determining unit is that the user is scheduled as an OMA transmission scheme in the current subframe and the current resource block, directly decode a signal received by the user.
8. The apparatus of claim 7, further comprising: and the semi-static signaling receiving unit is used for receiving the semi-static RRC signaling sent by the base station and acquiring the indication that the user enters the NOMA mode.
9. The apparatus of claim 7 or 8, further comprising:
and the far-end user signal processing unit is used for processing the signal sent by the base station to the user as interference and demodulating the signal received by the far-end user in a Quadrature Phase Shift Keying (QPSK) mode.
10. A downlink data transmission apparatus, comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the method of downstream data transmission according to any of claims 1 to 6 based on instructions stored in the memory device.
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| CN111417203B (en) * | 2019-01-07 | 2023-05-09 | 中国移动通信有限公司研究院 | Method, terminal and network equipment for determining uplink data transmission |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| US10149318B2 (en) * | 2014-09-02 | 2018-12-04 | Qualcomm Incorporated | Techniques for transmitting and receiving downlink control information for a set of NOMA downlink transmissions |
| CN105991225A (en) * | 2015-02-13 | 2016-10-05 | 富士通株式会社 | Information transmission method and device, and communication system |
| CN105991235B (en) * | 2015-03-04 | 2020-10-30 | 株式会社Ntt都科摩 | Method for adjusting code modulation scheme, user equipment and base station |
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Non-Patent Citations (1)
| Title |
|---|
| Blind Detection Evaluation on Interference Existence for Case 1;MediaTek Inc.;《3GPP TSG-RAN WG1 Meeting #85 R1-164979》;20160527;全文 * |
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