CN107968703B - Transmission processing method, device, electronic equipment and storage medium - Google Patents
Transmission processing method, device, electronic equipment and storage medium Download PDFInfo
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 79
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
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Abstract
The embodiment of the invention provides a transmission processing method and device, electronic equipment and a storage medium. The method comprises the steps of determining a first channel coefficient and a plurality of second channel coefficients for each uplink user, wherein the first channel coefficient is the channel coefficient of an uplink channel, and the second channel coefficient is the channel coefficient of an interference channel between the uplink user and a downlink user; sequencing the first channel coefficient and the plurality of second channel coefficients from small to large, recording the position of the first channel coefficient in the sequence as a sequence number j, and recording the position of the second channel coefficient corresponding to a certain downlink user in the sequence as a sequence number i; comparing the i and the j, preliminarily selecting a user pair according to a comparison result, and sending a channel detection instruction to the preliminarily selected user pair; and according to the result of the channel detection, carrying out user pairing and selection of a transmission mode. The method improves the network capacity, reduces the detection of channels among users and saves the signaling overhead.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a transmission processing method, a transmission processing device, electronic equipment and a storage medium.
Background
With the ever-increasing traffic, communication systems will have to support hundreds or thousands of times more data traffic services than today in the foreseeable future, and the need for high spectrum efficiency techniques will become more and more acute. Therefore, as two emerging technologies that help improve the spectrum efficiency of the communication system, the full-duplex technology and the non-orthogonal multiple access technology have received a consistent attention from both academic and industrial fields.
Full-duplex technology is characterized by supporting simultaneous reception and transmission, but suffers from strong self-interference. If self-interference is not processed, the received signal from the own transmit antenna completely drowns out the remaining signals needed. Aiming at the problems, various solutions are proposed by various research groups at home and abroad, and remarkable results are obtained. In general, a self-interference cancellation system consists of analog domain self-interference cancellation and digital domain self-interference cancellation. But today's technology is not able to completely eliminate self-interference. In addition, in a full duplex system, there is interference from an uplink user to a downlink user, that is, inter-user interference. If the interference between users is too large, the performance of the whole system is influenced. For single antenna systems, inter-user interference cancellation is discussed in the prior art. One is to perform pairing transmission on users with longer distance, and reduce the interference between users by using larger path loss; the other is to perform adaptive serial interference cancellation at the downlink user receiving end to reduce the inter-user interference. For a multi-antenna system, a beam forming method is provided, and interference among users is eliminated by optimizing the frequency efficiency of the system.
The characteristic of the non-orthogonal multiple access is that the signal of a specific user can be correctly demodulated from the received multi-user superposed signal.
When the cell radius is small (for example, in the current microcellular network), the distance between users is not enough to eliminate the interference between users, and the method of pairing and transmitting users far apart is not suitable. For the scheme of adaptive serial interference cancellation at the receiving end of the downlink user, the base station needs to know all channel information including the uplink channel, the downlink channel and the inter-user channel, and can perform reasonable user pairing and serial interference cancellation. When there are many users in a cell, detecting all user channels generates a large amount of signaling overhead, and the algorithm complexity is large, thus being uneconomical. The multi-antenna-based spectrum efficiency optimization problem is large in algorithm complexity, all channel information also needs to be known, and signaling overhead is large.
At present, the prior art has no corresponding method for solving the problems.
Disclosure of Invention
In order to overcome the defects in the prior art, embodiments of the present invention provide a transmission processing method, apparatus, electronic device, and storage medium.
In one aspect, an embodiment of the present invention provides a method for transmission processing, where the method includes:
for each uplink user, determining a first channel coefficient and a plurality of second channel coefficients, wherein the first channel coefficient is the channel coefficient of an uplink channel, and the second channel coefficient is the channel coefficient of an interference channel between the uplink user and a downlink user;
sequencing the first channel coefficient and the plurality of second channel coefficients from small to large, recording the position of the first channel coefficient in the sequence as a sequence number j, and recording the position of the second channel coefficient corresponding to a certain downlink user in the sequence as a sequence number i;
comparing the i and the j, preliminarily selecting a user pair according to a comparison result, and sending a channel detection instruction to the preliminarily selected user pair;
and according to the result of the channel detection, carrying out user pairing and selection of a transmission mode.
In another aspect, an embodiment of the present invention provides an apparatus for transmission processing, where the apparatus includes:
a determining module, configured to determine, for each uplink user, a first channel coefficient and a plurality of second channel coefficients, where the first channel coefficient is a channel coefficient of an uplink channel, and the second channel coefficient is a channel coefficient of an interference channel between the uplink user and a downlink user;
the sorting module is used for sorting the first channel coefficient and the plurality of second channel coefficients from small to large, and recording the position of the first channel coefficient in the sequence as a sequence number j and recording the position of the second channel coefficient corresponding to a certain downlink user in the sequence as a sequence number i;
the comparison module is used for comparing the i and the j, preliminarily selecting the user pair according to the comparison result, and sending a channel detection instruction to the preliminarily selected user pair;
and the selection module is used for selecting user pairing and a transmission mode according to the result of the channel detection.
In another aspect, an embodiment of the present invention further provides an electronic device, which includes a memory, a processor, a bus, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the above method when executing the program.
In another aspect, an embodiment of the present invention further provides a storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the steps of the above method.
It can be seen from the foregoing technical solutions that, in the transmission processing method, apparatus, electronic device, and storage medium provided in the embodiments of the present invention, the method reduces detection of channels between users while increasing network capacity, and saves signaling overhead.
Drawings
Fig. 1 is a flowchart illustrating a method of transmission processing according to an embodiment of the present invention;
fig. 2 is a schematic model diagram of a full-duplex system according to an embodiment of the present invention.
Fig. 3 is a diagram illustrating a comparison of uplink and downlink rates of the NOMA-FD mode and Con-FD mode according to an embodiment of the present invention;
fig. 4 is a diagram illustrating a comparison of uplink and downlink rates of another NOMA-FD mode and Con-FD mode according to an embodiment of the present invention;
fig. 5 is a diagram illustrating a comparison of uplink and downlink rates of a NOMA-FD mode and a Con-FD mode according to another embodiment of the present invention;
FIG. 6 is a partial flow chart of an algorithm for a method of transmission processing according to another embodiment of the present invention;
fig. 7 is a signaling flow diagram of a method of transmission processing according to another embodiment of the present invention;
fig. 8 is a schematic diagram illustrating simulation results of a transmission processing method according to another embodiment of the present invention;
fig. 9 is a schematic structural diagram of a transmission processing apparatus according to yet another embodiment of the present invention;
fig. 10 is a schematic structural diagram of an electronic device according to yet another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.
Fig. 1 is a flowchart illustrating a method for transmission processing according to an embodiment of the present invention.
As shown in fig. 1, the method provided in the embodiment of the present invention specifically includes the following steps:
step 11, for each uplink user, determining a first channel coefficient and a plurality of second channel coefficients, where the first channel coefficient is a channel coefficient of an uplink channel, and the second channel coefficient is a channel coefficient of an interference channel between the uplink user and a downlink user;
step 12, sequencing the first channel coefficient and the plurality of second channel coefficients from small to large, recording the position of the first channel coefficient in the sequence as a sequence number j, and recording the position of the second channel coefficient corresponding to a certain downlink user in the sequence as a sequence number i;
step 13, comparing the i and the j, preliminarily selecting a user pair according to a comparison result, and sending a channel detection instruction to the preliminarily selected user pair;
and step 14, selecting user pairing and a transmission mode according to the result of the channel detection.
The transmission mode comprises a NOMA-FD mode and a Con-FD mode, wherein the NOMA-FD mode is a mode for considering an interference signal of an uplink user as a useful signal, using serial interference cancellation at a downlink user end and jointly demodulating the interference signal and the downlink signal, and the Con-FD mode is a mode for demodulating only the downlink signal without processing the interference signal.
The Full-duplex (FD) system is described below.
In a cell, there is one base station (dual antenna, one transmission and one reception) capable of supporting FD mode, and M uplink users and N downlink users (single antenna) supporting HD (Half-duplex) mode. The bandwidth allocated to the cell may be for transmission by multiple orthogonal carriers.
Alternatively, multi-carrier is a direct extension of the single carrier problem for how to perform interference cancellation and user pairing under single carrier.
Fig. 2 shows a model diagram of a full-duplex system provided by an embodiment of the present invention.
As shown in fig. 2, in a Full-duplex (FD) system, each timeslot needs to select one user from M uplink users and N downlink users, so as to form a pair of uplink and downlink users for data transmission. It is assumed that a certain time slot is occupied by uplink user m and downlink user n. Due to the support of FD communication, the base station has self-interference, and the received signal of the base station is:
yB＝hmBxm+sB+z
wherein, E (| s)B|2)＝PB/η，PBIs the transmitting power of the base station, and eta is the self-interference elimination coefficient of the self-interference elimination system of the base station; e (| x)m|2)＝PmThe transmission power of the uplink user; z is additive white Gaussian noise, E (| z |)2)＝σ2. Xm is the signal sent by the base station to the uplink user m, SBIs the self-interference of the transmit and receive antennas,
in addition, the uplink user may generate interference to the downlink user, and the downlink user receives signals as follows:
ym＝hBnxB+hmnxm+z
wherein, E (| x)B|2)＝PBFor base station transmit power, hmnxmI.e. an inter-user interference signal. h ismnFor channels between uplink users m and downlink users n, XBIs a signal transmitted by a base station, hBnIs the channel between the base station and the downlink user n.
When no processing is performed on the inter-user interference, the uplink and downlink rates of the user pair (m, n) can be calculated by the following formula. We refer to the general case FD transmission mode, namely Con-FD (concentional FD) mode.
Wherein,for the rate of the uplink user m,the rate of the downlink user n. It can be seen that the rate of the downlink user n is greatly limited due to the presence of inter-user interference.
The following describes a method for eliminating interference of a full-duplex system based on a non-orthogonal multiple access technology.
The uplink and downlink rates in the NOMA-FD mode are calculated as piecewise functions:
wherein, the sum rate of the NOMA-FD modes is also a piecewise function, which can be calculated by:
fig. 3 is a diagram illustrating a comparison of uplink and downlink rates of the NOMA-FD mode and Con-FD mode according to an embodiment of the present invention;
fig. 4 is a diagram illustrating a comparison of uplink and downlink rates of another NOMA-FD mode and Con-FD mode according to an embodiment of the present invention;
fig. 5 is a diagram illustrating a comparison of uplink and downlink rates of another NOMA-FD mode and Con-FD mode according to an embodiment of the present invention.
As shown in FIGS. 3-5, the uplink and downlink rates of NOMA-FD mode and Con-FD mode under different channel conditionsAnd (6) comparing. In FIGS. 3-5, black dots represent NOMA-FD mode, white dots represent Con-FD mode, and vertical axis represents downlink rate RnThe horizontal axis is the uplink rate Rm。
The black working point realization method comprises the following steps:
in FIG. 3, the uplink rate is R'mInterference can be completely removed at the downlink user n by firstly demodulating the interference signal, thereby realizing the downlink rate
In FIG. 4, the uplink rate is R'mThe downlink user n realizes the downlink rate R by demodulating part of the interference signals, then demodulating the downlink signals and finally demodulating the rest of the interference signalsmn-R′m；
In fig. 5, downlink user n demodulates downlink signal first, and then demodulates signal, thereby implementing downlink rateAt this time, the uplink user receives the constraint of the interference channel and can only realize the uplink rateSince the NOMA-FD mode requires the downlink user to demodulate the desired signal and the interfering signal, the rate of the uplink user is doubly constrained by the uplink channel and the interfering channel.
The uplink and downlink rates of the NOMA-FD mode and the Con-FD mode are compared. Intuitively, in the cases of fig. 3 and 4, the NOMA-FD mode can support a downlink rate greater than that of the Con-FD mode while ensuring the same uplink rate; in the case of fig. 5, the NOMA-FD mode can ensure the same downstream rate, but the upstream rate is lower than the Con-FD mode. This is because the NOMA-FD mode needs to ensure that the downlink user can decode the information of the uplink user whose rate is limited by the interfering channel. It follows that the NOMA-FD mode is not always better than the Con-FD mode, especially in the case of fig. 5. Uplink and downlink rate transmission can be performed in the Con-FD mode at this time, thereby maximizing uplink and downlink rates.
The user pairing and pattern selection algorithms are described in detail below.
And in each time slot, selecting the uplink and downlink users with the maximum rate for paired transmission so as to maximize the system throughput. It is found that the maximum sum rate may be achieved by the NOMA-FD mode or by the Con-FD mode, depending on the conditions of the uplink and downlink channels, the interference channel, etc. Therefore, the selection of the two modes should be performed at the same time as the user pairing.
An intuitive user selection method is: the sum rates of all possible user pairs (co-MN pairs) in both modes are calculated, the user pair with the largest sum rate is selected, and the corresponding mode is transmitted. This method requires that the correct channel information be available in each time slot, and requires a large number of rate calculations, which is too complex.
Therefore, the mode selection process was simplified by analyzing the performance of NOMA-FD and Con-FD.
Based on the above analysis of the uplink and downlink rates, whenWhen there isThat is, the up-down sum and rate of NOMA-FD is lower than that of Con-FD; otherwise, the NOMA-FD ascending and descending row and rate are higher than the Con-FD.
If all channels are measured, the base station end has accurate channel information and performs mode selection. But this approach clearly requires a large channel detection signaling overhead.
It is assumed that the base station only has the magnitude relation of different channel coefficients and does not have accurate channel information. Then, after selecting the uplink user m, the uplink channel h can be setmBAnd N interference channels hmnN is more than or equal to 1 and less than or equal to N, and the N is sorted from small to large.
Suppose an uplink channel hmBThe position in the sequenced sequence is j, and the interference channel h corresponding to the selected downlink usermnAt a position i (i ≠ I)j)。
It can be known that: 1.i>At the time of j, the number of the first,it is always true that the upward and downward rows and rate of NOMA-FD are higher than that of Con-FD. The channel coefficient of the interference channel is | hmn|2The channel coefficient of the uplink channel is | hmB|2，i<j, there is a certain probability thatIt holds true that the probability becomes smaller as i becomes smaller.
That is, if it is determined that i is greater than j, the uplink user and the downlink user corresponding to the interference channel with the channel coefficient ordered as i form a user pair, and the transmission is performed in the NOMA-FD mode.
That is, for a selected uplink user m, the interference channel h corresponding to the selected downlink user nmnThe higher the ranking (i.e., h)mnThe larger the value of) the greater the probability that the sum-rate of NOMA-FD is greater than Con-FD. When the ordering of the interfering channels is higher than the ordering of the uplink channels, the sum rate of the NOMA-FD mode is certain to be greater than the FD mode.
The following describes the user pairing algorithm design in detail.
A low complexity user selection algorithm is proposed.
If the user determines that i is less than j and before the user adopts the Con-FD mode, the method further comprises the following steps:
and adjusting a preset adjusting factor to adjust the number of the user pairs adopting the Con-FD mode.
For each uplink user m, the uplink channel and N interference channels can be sorted, and for the user pair corresponding to the interference channel superior to the uplink channel (the sort is higher than the uplink channel), the NOMA-FD mode is inevitably used. For the user pairs corresponding to the interference channels (ranked lower than the uplink channels) inferior to the uplink channels, through the analysis of the previous section, it can be found that the higher the sequence number of the interference channel is, the lower the probability that the sum rate of the NOMA-FD mode is lower than that of the FD mode is. Therefore, we regulate factor αTo adjust the number of Con-FD modes selected in the user pair, i.e. to make the rank smallerUsing Con-FD mode for user pairs, where symbols areFor rounding up, Q is the number of user pairs with sequence numbers lower than the uplink channel, and alpha belongs to [0,1 ]]。
The NOMA-FD mode is adopted for transmission, and after the Con-FD mode is adopted for transmission, the method further comprises the following steps:
determining a third channel coefficient for a downlink user in a plurality of predetermined user pairs adopting the Con-FD mode, wherein the third channel coefficient is the channel coefficient of the downlink channel of the user pairs adopting the Con-FD mode;
sequencing the third channel coefficients to obtain a downlink user corresponding to the highest sequencing third channel coefficient, and taking the downlink user and an uplink user as a first user pair;
determining a fourth channel coefficient for a downlink user in a plurality of predetermined user pairs adopting the NOMA-FD mode, wherein the fourth channel coefficient is the channel coefficient of the downlink channel of the user pair adopting the NOMA-FD mode;
sequencing the fourth channel coefficients to obtain a downlink user corresponding to the highest sequencing fourth channel coefficient, and taking the downlink user and the uplink user as a second user pair;
and taking the first user pair and the second user pair as a preliminary selection user pair.
The step of performing user pairing and transmission mode selection according to the result of channel detection specifically comprises:
calculating a first maximum uplink and downlink speed of an uplink user and a downlink user of a first user pair adopting a NOMA-FD mode, and calculating a second maximum uplink and downlink speed of an uplink user and a downlink user of a second user pair adopting a Con-FD mode;
if the first maximum uplink and downlink speed is greater than the second maximum uplink and downlink speed, selecting a user pair corresponding to the first maximum uplink and downlink speed, and selecting a Con-FD mode for data transmission;
and if the second maximum uplink and downlink speed is greater than or equal to the first maximum uplink and downlink speed, selecting a user pair corresponding to the second maximum uplink and downlink speed, and selecting the NOMA-FD mode for data transmission.
Fig. 6 is a partial algorithm flowchart of the transmission processing method provided in this embodiment.
As shown in the sum rate formula of the two modes, for the sum rate of NOMA-FD mode and Con-FD mode, the term playing the main role in the sum rate is | h under the condition that the transmission power of the base station is largerBn|2PB/σ2. That is, the downlink channel | hBn|2Will have a major impact on the sum rate in both modes.
For using Con-FD modeFor user pair, for downlink channel | hBn|2Sorting and selecting a downlink channel | hBn|2And obtaining accurate channel information for the largest user pair, and calculating the sum rate of the user pairs.
For using NOMA-FD modeFor user pair, for downlink channel | hBn|2Sorting and selecting a downlink channel | hBn|2And obtaining accurate channel information for the largest user pair, and calculating the sum rate of the user pairs.
Then, traversing all uplink users, repeating the steps, and selecting 2M or M pairs of users.
And finally, comparing the sum rate of the selected 2M or M pairs of users, and selecting the user pair with the maximum sum rate for transmission.
It can be considered that the downlink users are divided into two parts, one part is in the NOMA-FD mode, the other part is in the Con-FD mode, one downlink user is selected from the NOMA-FD mode, one downlink user is selected from the Con-FD mode, i.e. each uplink user has one downlink user of the NOMA-FD and one downlink user of the Con-FD, and then 2M pairs are selected. If α is 0, then only the user pairs in NOMA-FD mode are present, which means that only M pairs are present.
The algorithm only needs to perform sum rate calculation and channel detection on M pairs of users, and compared with the sum rate calculation and channel detection on users by MN required by an exhaustive algorithm, the complexity and signaling overhead are greatly reduced.
Fig. 7 is a signaling flowchart of the transmission processing method provided in this embodiment.
As shown in fig. 7, a signaling flow is described by taking 3 users as an example, where users 2 and 3 are downlink users, user 1 is an uplink user, and it is assumed that uplink and downlink channels are known and an inter-user interference channel is unknown.
Step 1: the base station end obtains respective position information of 3 users, the base station carries out rough calculation on interference channels based on the position information to obtain channel estimation results of the interference channels, correspondingly obtains channel coefficients of the interference channels, namely second channel coefficients, and sequences the interference channels and uplink channels.
That is, for each uplink user in step 11, the step of determining the plurality of second channel coefficients specifically includes:
the base station carries out preliminary estimation of an interference channel according to the position information of an uplink user and the predetermined downlink user to obtain an estimation result of the interference channel;
and obtaining a second channel coefficient according to the estimation result.
Step 2: and the base station performs initial selection of the user pairs based on the user pairing and mode selection algorithm and issues a channel detection instruction to the selected users.
And step 3: and the selected user carries out interference channel measurement and feeds back channel information to the base station.
And 4, step 4: and the base station performs user pairing and mode selection based on the fed back channel information, and sends corresponding pairing information to corresponding users. And the paired users carry out uplink and downlink transmission of data.
The transmission processing method provided by the embodiment of the invention provides a method for eliminating inter-user interference based on non-orthogonal multiple access aiming at a full duplex system under the condition of multiple users, which is used for reducing the inter-user interference; and a user pairing and mode selection algorithm is provided, so that the detection of channels among users is reduced while the network capacity is improved, and the signaling overhead is saved.
In order to more fully understand the technical content of the present invention, on the basis of the above embodiments, the method of the transmission processing provided in the present embodiment is explained in detail through experimental parameters.
Base station signal-to-noise ratio PB/σ2-5:5:20 dB; uplink user signal-to-noise ratio Pm/σ20 dB; the number M of uplink users is 2; the number N of downlink users is 4; the self-interference coefficient η is 1. | hmB|2，|hBn|2，|hmn|2A negative exponential distribution with λ ═ 1 is obeyed. The number of experiments was 10000 timeslots.
Fig. 8 is a schematic diagram of a simulation result of the transmission processing method provided in this embodiment.
FIG. 8 illustrates an optimal selection curve showing the results of an exhaustive method, with user selection and mode selection results being optimal; the random selection curve shows that a pair of uplink and downlink users are randomly selected, the sum rate in the NOMA-FD mode and the Con-FD mode is respectively calculated, and the mode corresponding to the maximum sum rate is selected for transmission. The optimal selection and the random selection can be used as standard algorithms for performance comparison.
The algorithm of the invention is superior to random selection and approaches to optimal selection. When the signal-to-noise ratio of the base station is low, the system throughput in the case of α ═ 1 is greater than that in the case of α ═ 0, because the probability that Con-FD and rate are greater than NOMA-FD is greater when the signal-to-noise ratio is low, and only the use of NOMA-FD mode cannot be considered (i.e., the case of α ═ 0). When the signal-to-noise ratio is high, the throughput of α -0 is greater than α -1 and is very close to the optimal selection result, because at high signal-to-noise ratio the sum rate of NOMA-FD mode is greater than Con-FD mode with a great probability, it is reasonable to consider only the use of NOMA-FD mode.
Fig. 9 is a schematic structural diagram of a transmission processing apparatus according to yet another embodiment of the present invention.
Referring to fig. 9, on the basis of the above embodiment, the apparatus for transmission processing provided by this embodiment includes a determining module 71 and a sorting module 72. A comparison module 73 and a selection module 74, wherein:
the determining module 71 is configured to determine, for each uplink user, a first channel coefficient and a plurality of second channel coefficients, where the first channel coefficient is a channel coefficient of an uplink channel, and the second channel coefficient is a channel coefficient of an interference channel between the uplink user and a downlink user; the sorting module 72 is configured to sort the first channel coefficients and the plurality of second channel coefficients from small to large, note that the position of the first channel coefficient in the sequence is a sequence number j, and note that the position of the second channel coefficient corresponding to a certain downlink user in the sequence is a sequence number i; the comparison module 73 is used for comparing the i and the j, preliminarily selecting a user pair according to a comparison result, and sending a channel detection instruction to the preliminarily selected user pair; the selecting module 74 is configured to select the user pairing and the transmission mode according to the result of the channel detection.
The apparatus for transmission processing provided in this embodiment may be configured to execute the method in the foregoing method embodiment, and details of this implementation are not described again.
The transmission processing device provided by the embodiment improves the network capacity, reduces the detection of channels between users, and saves signaling overhead.
Fig. 10 is a schematic structural diagram of an electronic device according to yet another embodiment of the present invention.
Referring to fig. 10, an electronic device provided by the embodiment of the present invention includes a memory (memory)81, a processor (processor)82, a bus 83, and a computer program stored in the memory 81 and running on the processor. The memory 81 and the processor 82 complete communication with each other through the bus 83.
The processor 82 is used to call the program instructions in the memory 81 to implement the method of fig. 1 when executing the program.
In another embodiment, the processor, when executing the program, implements the method of:
the transmission mode comprises a NOMA-FD mode and a Con-FD mode, wherein the NOMA-FD mode is a mode for considering an interference signal of an uplink user as a useful signal, using serial interference cancellation at a downlink user end and jointly demodulating the interference signal and the downlink signal, and the Con-FD mode is a mode for demodulating only the downlink signal without processing the interference signal.
In another embodiment, the processor, when executing the program, implements the method of:
the step of comparing i and j and preliminarily selecting the user pairs according to the comparison result is specifically
If the fact that i is larger than j is obtained through judgment, an uplink user and a downlink user corresponding to an interference channel with a channel coefficient sequence of i form a user pair, and transmission is carried out in a NOMA-FD mode; and if the judgment result shows that i is less than j, the uplink user and the downlink user corresponding to the interference channel with the channel coefficient sequence of i form a user pair, and the transmission is carried out by adopting a Con-FD mode.
In another embodiment, the processor, when executing the program, implements the method of:
if the user determines that i is less than j and before the user adopts the Con-FD mode, the method further comprises the following steps:
and adjusting a preset adjusting factor to adjust the number of the user pairs adopting the Con-FD mode.
In another embodiment, the processor, when executing the program, implements the method of:
the NOMA-FD mode is adopted for transmission, and after the Con-FD mode is adopted for transmission, the method further comprises the following steps:
determining a third channel coefficient for a downlink user in a plurality of predetermined user pairs adopting the Con-FD mode, wherein the third channel coefficient is the channel coefficient of the downlink channel of the user pairs adopting the Con-FD mode;
sequencing the third channel coefficients to obtain a downlink user corresponding to the highest sequencing third channel coefficient, and taking the downlink user and an uplink user as a first user pair;
determining a fourth channel coefficient for a downlink user in a plurality of predetermined user pairs adopting the NOMA-FD mode, wherein the fourth channel coefficient is the channel coefficient of the downlink channel of the user pair adopting the NOMA-FD mode;
sequencing the fourth channel coefficients to obtain a downlink user corresponding to the highest sequencing fourth channel coefficient, and taking the downlink user and the uplink user as a second user pair;
and taking the first user pair and the second user pair as a preliminary selection user pair.
In another embodiment, the processor, when executing the program, implements the method of:
the step of performing user pairing and transmission mode selection according to the result of channel detection specifically comprises:
calculating a first maximum uplink and downlink speed of an uplink user and a downlink user of a first user pair adopting a NOMA-FD mode, and calculating a second maximum uplink and downlink speed of an uplink user and a downlink user of a second user pair adopting a Con-FD mode;
if the first maximum uplink and downlink speed is greater than the second maximum uplink and downlink speed, selecting a user pair corresponding to the first maximum uplink and downlink speed, and selecting a Con-FD mode for data transmission;
and if the second maximum uplink and downlink speed is greater than or equal to the first maximum uplink and downlink speed, selecting a user pair corresponding to the second maximum uplink and downlink speed, and selecting the NOMA-FD mode for data transmission.
In another embodiment, the processor, when executing the program, implements the method of:
for each uplink user, the step of determining the plurality of second channel coefficients specifically includes:
the base station carries out preliminary estimation of an interference channel according to the position information of an uplink user and the predetermined downlink user to obtain an estimation result of the interference channel;
and obtaining a second channel coefficient according to the estimation result.
The electronic device provided in this embodiment may be configured to execute the program corresponding to the method in the foregoing method embodiment, and this implementation is not described again.
In the electronic device provided in this embodiment, when the processor executes the program, the detection of channels between users is reduced while the network capacity is increased, and signaling overhead is saved
A further embodiment of the invention provides a storage medium having a computer program stored thereon, which when executed by a processor performs the steps of fig. 1.
In another embodiment, the program when executed by a processor implements a method comprising:
the transmission mode comprises a NOMA-FD mode and a Con-FD mode, wherein the NOMA-FD mode is a mode for considering an interference signal of an uplink user as a useful signal, using serial interference cancellation at a downlink user end and jointly demodulating the interference signal and the downlink signal, and the Con-FD mode is a mode for demodulating only the downlink signal without processing the interference signal.
In another embodiment, the program when executed by a processor implements a method comprising: the step of comparing i and j and preliminarily selecting the user pairs according to the comparison result is specifically
If the fact that i is larger than j is obtained through judgment, an uplink user and a downlink user corresponding to an interference channel with a channel coefficient sequence of i form a user pair, and transmission is carried out in a NOMA-FD mode; and if the judgment result shows that i is less than j, the uplink user and the downlink user corresponding to the interference channel with the channel coefficient sequence of i form a user pair, and the transmission is carried out by adopting a Con-FD mode.
In another embodiment, the program when executed by a processor implements a method comprising: if the user determines that i is less than j and before the user adopts the Con-FD mode, the method further comprises the following steps:
and adjusting a preset adjusting factor to adjust the number of the user pairs adopting the Con-FD mode.
In another embodiment, the program when executed by a processor implements a method comprising: the NOMA-FD mode is adopted for transmission, and after the Con-FD mode is adopted for transmission, the method further comprises the following steps:
determining a third channel coefficient for a downlink user in a plurality of predetermined user pairs adopting the Con-FD mode, wherein the third channel coefficient is the channel coefficient of the downlink channel of the user pairs adopting the Con-FD mode;
sequencing the third channel coefficients to obtain a downlink user corresponding to the highest sequencing third channel coefficient, and taking the downlink user and an uplink user as a first user pair;
determining a fourth channel coefficient for a downlink user in a plurality of predetermined user pairs adopting the NOMA-FD mode, wherein the fourth channel coefficient is the channel coefficient of the downlink channel of the user pair adopting the NOMA-FD mode;
sequencing the fourth channel coefficients to obtain a downlink user corresponding to the highest sequencing fourth channel coefficient, and taking the downlink user and the uplink user as a second user pair;
and taking the first user pair and the second user pair as a preliminary selection user pair.
In another embodiment, the program when executed by a processor implements a method comprising: the step of performing user pairing and transmission mode selection according to the result of channel detection specifically comprises:
calculating a first maximum uplink and downlink speed of an uplink user and a downlink user of a first user pair adopting a NOMA-FD mode, and calculating a second maximum uplink and downlink speed of an uplink user and a downlink user of a second user pair adopting a Con-FD mode;
if the first maximum uplink and downlink speed is greater than the second maximum uplink and downlink speed, selecting a user pair corresponding to the first maximum uplink and downlink speed, and selecting a Con-FD mode for data transmission;
and if the second maximum uplink and downlink speed is greater than or equal to the first maximum uplink and downlink speed, selecting a user pair corresponding to the second maximum uplink and downlink speed, and selecting the NOMA-FD mode for data transmission.
In another embodiment, the program when executed by a processor implements a method comprising: for each uplink user, the step of determining the plurality of second channel coefficients specifically includes:
the base station carries out preliminary estimation of an interference channel according to the position information of an uplink user and the predetermined downlink user to obtain an estimation result of the interference channel;
and obtaining a second channel coefficient according to the estimation result.
In the storage medium provided in this embodiment, when the program is executed by the processor, the method in the foregoing method embodiment is implemented, and details of this implementation are not described again.
The storage medium provided by the embodiment improves the network capacity, reduces the detection of channels among users, and saves the signaling overhead
Those skilled in the art will appreciate that although some embodiments described herein include some features included in other embodiments instead of others, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments.
Those skilled in the art will appreciate that the steps of the embodiments may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functionality of some or all of the components according to embodiments of the present invention. The present invention may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (7)
1. A method of transmission processing, the method comprising:
for each uplink user, determining a first channel coefficient and a plurality of second channel coefficients, wherein the first channel coefficient is the channel coefficient of an uplink channel, and the second channel coefficient is the channel coefficient of an interference channel between the uplink user and a downlink user;
sequencing the first channel coefficient and the plurality of second channel coefficients from small to large, recording the position of the first channel coefficient in the sequence as a sequence number j, and recording the position of the second channel coefficient corresponding to a certain downlink user in the sequence as a sequence number i;
comparing the i and the j, preliminarily selecting a user pair according to a comparison result, and sending a channel detection instruction to the preliminarily selected user pair;
according to the result of the channel detection, user pairing and transmission mode selection are carried out;
the step of comparing i and j, and according to the comparison result, primarily selecting the user pairs specifically comprises the following steps:
if the fact that i is larger than j is obtained through judgment, an uplink user and a downlink user corresponding to an interference channel with a channel coefficient sequence of i form a user pair, and transmission is carried out in a NOMA-FD mode; if the judgment result shows that i is less than j, the uplink user and the downlink user corresponding to the interference channel with the channel coefficient sequence of i form a user pair, and the transmission is carried out by adopting a Con-FD mode;
if the user determines that i is less than j and before the user adopts the Con-FD mode, the method further comprises the following steps:
adjusting a preset adjusting factor, and adjusting the number of user pairs adopting a Con-FD mode;
the NOMA-FD mode is adopted for transmission, and after the Con-FD mode is adopted for transmission, the method further comprises the following steps:
determining a third channel coefficient for a downlink user in a plurality of predetermined user pairs adopting the Con-FD mode, wherein the third channel coefficient is the channel coefficient of the downlink channel of the user pairs adopting the Con-FD mode;
sequencing the third channel coefficients to obtain a downlink user corresponding to the highest sequencing third channel coefficient, and taking the downlink user and an uplink user as a first user pair;
determining a fourth channel coefficient for a downlink user in a plurality of predetermined user pairs adopting the NOMA-FD mode, wherein the fourth channel coefficient is the channel coefficient of the downlink channel of the user pair adopting the NOMA-FD mode;
sequencing the fourth channel coefficients to obtain a downlink user corresponding to the highest sequencing fourth channel coefficient, and taking the downlink user and the uplink user as a second user pair;
and taking the first user pair and the second user pair as a preliminary selection user pair.
2. The method of claim 1, wherein: the transmission mode comprises a NOMA-FD mode and a Con-FD mode, wherein the NOMA-FD mode is a mode for considering an interference signal of an uplink user as a useful signal, using serial interference cancellation at a downlink user end and jointly demodulating the interference signal and the downlink signal, and the Con-FD mode is a mode for demodulating only the downlink signal without processing the interference signal.
3. The method of claim 2, wherein: the step of performing user pairing and transmission mode selection according to the channel detection result specifically comprises:
calculating a first maximum uplink and downlink speed of an uplink user and a downlink user of a first user pair adopting a NOMA-FD mode, and calculating a second maximum uplink and downlink speed of an uplink user and a downlink user of a second user pair adopting a Con-FD mode;
if the first maximum uplink and downlink speed is greater than the second maximum uplink and downlink speed, selecting a user pair corresponding to the first maximum uplink and downlink speed, and selecting a Con-FD mode for data transmission;
and if the second maximum uplink and downlink speed is greater than or equal to the first maximum uplink and downlink speed, selecting a user pair corresponding to the second maximum uplink and downlink speed, and selecting the NOMA-FD mode for data transmission.
4. The method of claim 1, wherein: for each uplink user, the step of determining the plurality of second channel coefficients specifically includes:
the base station carries out preliminary estimation of an interference channel according to the position information of an uplink user and the predetermined downlink user to obtain an estimation result of the interference channel;
and obtaining a second channel coefficient according to the estimation result.
5. An apparatus for transmission processing, the apparatus comprising:
a determining module, configured to determine, for each uplink user, a first channel coefficient and a plurality of second channel coefficients, where the first channel coefficient is a channel coefficient of an uplink channel, and the second channel coefficient is a channel coefficient of an interference channel between the uplink user and a downlink user;
the sorting module is used for sorting the first channel coefficient and the plurality of second channel coefficients from small to large, and recording the position of the first channel coefficient in the sequence as a sequence number j and recording the position of the second channel coefficient corresponding to a certain downlink user in the sequence as a sequence number i;
the comparison module is used for comparing the i and the j, preliminarily selecting the user pair according to the comparison result, and sending a channel detection instruction to the preliminarily selected user pair;
the selection module is used for selecting user pairing and a transmission mode according to the result of the channel detection;
comparing the i and the j, and according to the comparison result, primarily selecting the user pairs specifically comprises the following steps:
if the fact that i is larger than j is obtained through judgment, an uplink user and a downlink user corresponding to an interference channel with a channel coefficient sequence of i form a user pair, and transmission is carried out in a NOMA-FD mode; if the judgment result shows that i is less than j, the uplink user and the downlink user corresponding to the interference channel with the channel coefficient sequence of i form a user pair, and the transmission is carried out by adopting a Con-FD mode;
if the user determines that i is less than j, before the user adopts the Con-FD mode, the method further comprises the following steps:
adjusting a preset adjusting factor, and adjusting the number of user pairs adopting a Con-FD mode;
the transmitting in the NOMA-FD mode and after the transmitting in the Con-FD mode further includes:
determining a third channel coefficient for a downlink user in a plurality of predetermined user pairs adopting the Con-FD mode, wherein the third channel coefficient is the channel coefficient of the downlink channel of the user pairs adopting the Con-FD mode;
sequencing the third channel coefficients to obtain a downlink user corresponding to the highest sequencing third channel coefficient, and taking the downlink user and an uplink user as a first user pair;
determining a fourth channel coefficient for a downlink user in a plurality of predetermined user pairs adopting the NOMA-FD mode, wherein the fourth channel coefficient is the channel coefficient of the downlink channel of the user pair adopting the NOMA-FD mode;
sequencing the fourth channel coefficients to obtain a downlink user corresponding to the highest sequencing fourth channel coefficient, and taking the downlink user and the uplink user as a second user pair;
and taking the first user pair and the second user pair as a preliminary selection user pair.
6. An electronic device comprising a memory, a processor, a bus and a computer program stored on the memory and executable on the processor, characterized in that the steps of any of claims 1-4 are implemented when the processor executes the program.
7. A storage medium having a computer program stored thereon, characterized in that: the program when executed by a processor implementing the steps of any of claims 1-4.
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