CN107968703B - Method, device, electronic device and storage medium for transmission processing - Google Patents

Abstract

Embodiments of the present invention provide a transmission processing method, device, electronic equipment, and storage medium. The method includes, for each uplink user, determining a first channel coefficient and a plurality of second channel coefficients, the first channel coefficient is the channel coefficient of the uplink channel, and the second channel coefficient is the difference between the uplink user and the downlink user The channel coefficients of interfering channels; the first channel coefficient and the plurality of second channel coefficients are sorted from small to large, and the position of the first channel coefficient in the sequence is recorded as the sequence number j, and a certain downlink The position of the second channel coefficient corresponding to the user in the sequence is sequence number i; comparing i and j, and initially selecting a user pair according to the comparison result, and sending a channel detection instruction to the initially selected user pair; according to the channel detection As a result, user pairing and selection of a transfer mode are performed. The method reduces the detection of channels between users and saves signaling overhead while improving network capacity.

Description

Method, device, electronic device and storage medium for transmission processing

technical field

Embodiments of the present invention relate to the field of communication technologies, and in particular, to a transmission processing method, device, electronic device, and storage medium.

Background technique

With the continuous increase of communication services, in the foreseeable future, communication systems will have to support data services that are hundreds to thousands of times higher than today, and the demand for high spectrum efficiency technologies will become increasingly urgent. Therefore, as two emerging technologies that help improve the spectrum efficiency of communication systems, full-duplex technology and non-orthogonal multiple access technology have received unanimous attention from academia and industry.

The feature of full-duplex technology is that it supports simultaneous reception and transmission, but it will be strongly affected by self-interference. If self-interference is not dealt with, the received signal from the own transmit antenna will completely overwhelm the rest of the desired signal. Aiming at the above problems, many research groups at home and abroad have put forward different solutions and achieved remarkable results. In general, a self-interference cancellation system consists of an analog domain self-interference cancellation and a digital domain self-interference cancellation. But today's technology cannot completely eliminate self-interference. In addition, in a full-duplex system, there is also interference between uplink users and downlink users, that is, inter-user interference. If the interference between users is too large, it will inevitably affect the performance of the overall system. For a single-antenna system, inter-user interference cancellation has been discussed in the prior art. Among them, one is to perform paired transmission on users that are far apart, and use a larger path loss to reduce inter-user interference; the other is to perform adaptive serial interference cancellation at the receiving end of downlink users to reduce inter-user interference . For multi-antenna systems, a beamforming method is proposed to eliminate inter-user interference by optimizing system frequency efficiency.

The characteristic of non-orthogonal multiple access is that it can correctly demodulate the signal of a specific user from the received multi-user superposition signal.

When the cell radius is small (such as the current microcellular network), and the distance between users is not enough to eliminate inter-user interference, the method of pairing and transmitting users that are far apart is not applicable. For the scheme of adaptive serial interference cancellation at the receiving end of downlink users, the base station needs to know all channel information, including uplink channel, downlink channel and inter-user channel, in order to be able to perform reasonable user pairing and serial interference cancellation. When there are many users in the cell, detecting all user channels will generate a large amount of signaling overhead, and the algorithm complexity is relatively large, so it is uneconomical. However, for the spectrum efficiency optimization problem based on multiple antennas, the algorithm complexity is relatively large, and all channel information needs to be known, and the signaling overhead is relatively large.

At present, there is no corresponding method in the prior art to solve the above problems.

Contents of the invention

Aiming at the defects in the prior art, the embodiments of the present invention provide a transmission processing method, device, electronic equipment, and storage medium.

On the one hand, an embodiment of the present invention provides a transmission processing method, the method including:

For each uplink user, determine a first channel coefficient and a plurality of second channel coefficients, the first channel coefficient is the channel coefficient of the uplink channel, and the second channel coefficient is the interference channel between the uplink user and the downlink user channel coefficient;

Sorting 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 sequence number j, recording the second channel corresponding to a certain downlink user The position of the coefficient in the sequence is number i;

Comparing i and j, initially selecting a user pair according to the comparison result, and sending a channel detection command to the initially selected user pair;

According to the result of channel detection, user pairing and transmission mode selection are performed.

On the other hand, an embodiment of the present invention provides a device for transmission processing, and the device includes:

A determining module, configured to determine a first channel coefficient and a plurality of second channel coefficients for each uplink user, the first channel coefficient is the channel coefficient of the uplink channel, and the second channel coefficient is the channel coefficient of the uplink user and the downlink user The channel coefficient of the interfering channel between;

A sorting module, configured to sort the first channel coefficient and the plurality of second channel coefficients from small to large, record the position of the first channel coefficient in the sequence as sequence number j, and record the position corresponding to a certain downlink user The position of the second channel coefficient in the sequence is number i;

The comparison module is used to compare i and j, initially select a user pair according to the comparison result, and send a channel detection instruction to the initially selected user pair;

The selection module is used for performing user pairing and selection of transmission mode according to the result of channel detection.

On the other hand, an embodiment of the present invention also provides an electronic device, including a memory, a processor, a bus, and a computer program stored in the memory and operable on the processor. When the processor executes the program, the above method is implemented. A step of.

On the other hand, an embodiment of the present invention also provides a storage medium on which a computer program is stored, and when the program is executed by a processor, the steps of the above method are implemented.

It can be known from the above technical solution that the transmission processing method, device, electronic device and storage medium provided by the embodiments of the present invention can increase the network capacity while reducing the detection of inter-user channels and saving signaling overhead.

Description of drawings

FIG. 1 is a schematic flowchart of a transmission processing method provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of a model of a full-duplex system provided by an embodiment of the present invention.

FIG. 3 is a comparison diagram of the uplink and downlink rates of the NOMA-FD mode and the Con-FD mode provided by the embodiment of the present invention;

FIG. 4 is a comparison diagram of uplink and downlink rates of another NOMA-FD mode and Con-FD mode provided by an embodiment of the present invention;

FIG. 5 is a comparison diagram of uplink and downlink rates between another NOMA-FD mode and Con-FD mode provided by an embodiment of the present invention;

FIG. 6 is a partial algorithm flow chart of a transmission processing method provided by another embodiment of the present invention;

FIG. 7 is a signaling flowchart of a transmission processing method provided by another embodiment of the present invention;

FIG. 8 is a schematic diagram of a simulation result of a transmission processing method provided by another embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a transmission processing device provided by another embodiment of the present invention;

FIG. 10 is a schematic structural diagram of an electronic device provided by another embodiment of the present invention.

Detailed ways

In order to make the purpose, 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 in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Embodiments of the invention are some embodiments, but not all embodiments.

Fig. 1 shows a schematic flowchart of a transmission processing method provided by an embodiment of the present invention.

As shown in Figure 1, the method provided by the embodiment of the present invention specifically includes the following steps:

Step 11, for each uplink user, determine a first channel coefficient and a plurality of second channel coefficients, the first channel coefficient is the channel coefficient of the uplink channel, and the second channel coefficient is the channel coefficient between the uplink user and the downlink user The channel coefficient of the interfering channel;

Step 12, sort the first channel coefficient and the plurality of second channel coefficients from small to large, record the position of the first channel coefficient in the sequence as sequence number j, and record the corresponding channel number of a certain downlink user The position of the second channel coefficient in the sequence is number i;

Step 13, comparing i and j, and initially selecting a user pair according to the comparison result, and sending a channel detection command to the initially selected user pair;

Step 14, perform user pairing and selection of transmission mode according to the result of channel detection.

The transmission mode includes NOMA-FD mode and Con-FD mode. The NOMA-FD mode regards the interference signal of the uplink user as a useful signal, uses serial interference cancellation at the downlink user end, and performs In a joint demodulation mode, the Con-FD mode is a mode in which only downlink signals are demodulated without processing interference signals.

The full-duplex (Full-duplex, FD) system is introduced below.

In a cell, there is a base station that supports FD mode (dual antennas, one transmission and one reception), and M uplink users and N downlink users (single antenna) that support HD (Half-duplex) mode. The bandwidth allocated to the cell can be used for transmission by multiple orthogonal carriers.

Optionally, for how to perform interference cancellation and user pairing under a single carrier, multi-carrier is a direct extension of the single-carrier problem.

Fig. 2 shows a schematic diagram of a model of a full-duplex system provided by an embodiment of the present invention.

As shown in Figure 2, in a full-duplex (Full-duplex, FD) system, each time slot needs to select one user from M uplink users and N downlink users to form a pair of uplink and downlink users. data transmission. Assume that a time slot is shared 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:

y _B ＝h _mB x _m +s _B +z

Among them, E(|s _B | ² )=P _B /η, P _B is the transmit power of the base station, η is the self-interference cancellation coefficient of the base station self-interference cancellation system; E(|x _m | ² )=P _m is the uplink User's transmit power; z is additive Gaussian white noise, E(|z| ² )=σ ² . Xm is the signal sent by the base station to the uplink user m, S _B is the self-interference between the transmitting antenna and the receiving antenna,

In addition, uplink users will interfere with downlink users, and the received signal of downlink users is:

y _m ＝h _Bn x _B +h _mn x _m +z

Wherein, E(|x _B | ² )=P _B is the transmit power of the base station, and h _mn x _m is the inter-user interference signal. h _mn is the channel between uplink user m and downlink user n, X _B is the signal transmitted by the base station, and h _Bn is the channel between the base station and downlink user n.

When no inter-user interference is processed, the uplink and downlink rates of the user pair (m, n) can be calculated by the following formula. We call it the general case FD transmission mode, that is, Con-FD (Conventional FD) mode.

in, is the rate of uplink user m, is the rate of downlink user n. It can be seen that due to the interference between users, the rate of the downlink user n is greatly limited.

The method for eliminating interference in a full-duplex system based on non-orthogonal multiple access technology is introduced below.

After calculation, the uplink and downlink rates in NOMA-FD mode are a piecewise function:

in, The sum rate of NOMA-FD mode is also a piecewise function, which can be calculated by the following formula:

FIG. 3 is a comparison diagram of the uplink and downlink rates of the NOMA-FD mode and the Con-FD mode provided by the embodiment of the present invention;

FIG. 4 is a comparison diagram of uplink and downlink rates of another NOMA-FD mode and Con-FD mode provided by an embodiment of the present invention;

Fig. 5 is a comparison diagram of the uplink and downlink rates of another NOMA-FD mode and Con-FD mode provided by an embodiment of the present invention.

As shown in Figure 3-Figure 5, under different channel conditions, the uplink and downlink rates of NOMA-FD mode and Con-FD mode are compared. In Figure 3-5, the black dots represent the NOMA-FD mode, the white dots represent the Con-FD mode, the vertical axis is the downlink rate R _n , and the horizontal axis is the uplink rate R _m .

The implementation method of the black working point:

In Figure 3, the uplink rate is R′ _m , and the downlink user n can completely remove the interference by first demodulating the interference signal, so as to realize the downlink rate

In Fig. 4, the uplink rate is R′ _m , and the downlink user n realizes the downlink rate R _mn −R′ _m by first demodulating part of the interference signal, then demodulating the downlink signal, and finally demodulating the remaining interference signal;

In Figure 5, the downlink user n demodulates the downlink signal first, and then demodulates the signal, so as to realize the downlink rate At this time, the uplink user is restricted by the interference channel and can only achieve the uplink rate Since the NOMA-FD mode requires the downlink user to demodulate the desired signal and the interference signal, the rate of the uplink user is double constrained by the uplink channel and the interference channel.

Compare the uplink and downlink rates of NOMA-FD mode and Con-FD mode. Intuitively, in the case of Figure 3 and Figure 4, the NOMA-FD mode can support a larger downlink rate than the Con-FD mode under the premise of ensuring the same uplink rate; and in the case of Figure 5, the NOMA- Although the FD mode can guarantee the same downlink rate, the uplink rate is lower than that of 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, and the rate of the uplink user is limited by the interference channel. It can be seen that the NOMA-FD mode is not always better than the Con-FD mode, especially in the case of Fig. 5. At this time, the Con-FD mode can be used for uplink and downlink rate transmission, so as to maximize the uplink and downlink rate.

The user pairing and mode selection algorithms are described in detail below.

In each time slot, the uplink and downlink users with the highest rate are selected for paired transmission to maximize system throughput. It can be found that the maximum sum rate may be realized through NOMA-FD mode or Con-FD mode, depending on conditions such as uplink and downlink channels and interference channels. Therefore, while the user is pairing, the selection of the two modes should also be performed.

An intuitive user selection method is: calculate the sum rate of all possible user pairs (a total of MN pairs) in the two modes, select the user pair with the largest sum rate, and transmit in the corresponding mode. This method requires correct channel information in each time slot, and requires a large number of rate calculations, and the complexity is too high.

Therefore, the performance of NOMA-FD and Con-FD is analyzed to simplify the mode selection process.

Based on the above analysis of uplink and downlink rates, when when there is That is, the uplink and downlink sum rate of NOMA-FD is lower than that of Con-FD; otherwise, the uplink and downlink sum rate of NOMA-FD is higher than that of Con-FD.

If all channels are measured, the base station will have accurate channel information for mode selection. However, this method undoubtedly requires a large channel detection signaling overhead.

It is assumed that the base station only has the magnitude relationship of different channel coefficients, but does not have accurate channel information. Then, after the uplink user m is selected, the uplink channel h _mB and N interference channels h _mn , 1≤n≤N can be sorted from small to large.

Assume that the position of the uplink channel h _mB in the sorted sequence is j, and the position of the interference channel h _mn corresponding to the selected downlink user is i (i≠j).

It can be known that: 1. When i>j, Constantly established, that is, the uplink and downlink sum rate of NOMA-FD is higher than that of Con-FD. The channel coefficient of the interference channel is |h _mn | ² , the channel coefficient of the uplink channel is |h _mB | ² , when i<j, there is a certain probability that is established, and the probability becomes smaller as i becomes smaller.

That is, if it is judged that i>j, the uplink user and the downlink user corresponding to the interference channel whose channel coefficient rank is i form a user pair, and the NOMA-FD mode is used for transmission.

That is to say, for a selected uplink user m, the higher the ranking of the interference channel h _mn corresponding to the selected downlink user n (that is, the larger the value of h _mn ), the uplink and downlink sum rate of NOMA-FD is greater than that of Con-FD The greater the probability. When the ranking of the interference channel is higher than that of the uplink channel, the sum rate of the NOMA-FD mode must be greater than that of the FD mode.

The design of the user pairing algorithm is introduced in detail below.

A low-complexity user selection algorithm is proposed.

If it is judged that after knowing i<j, before the user adopts the Con-FD mode, the method also includes:

Adjust the preset adjustment factor to adjust the number of user pairs using Con-FD mode.

For each uplink user m, its uplink channel and N interference channels can be sorted. For the user pair corresponding to the interference channel that is better than the uplink channel (ranking higher than the uplink channel), the NOMA-FD mode must be used. For the user pair corresponding to the interference channel inferior to the uplink channel (ranking lower than the uplink channel), through the analysis in the previous section, it can be found that the higher the sequence number of the interference channel, the probability that the sum rate of the NOMA-FD mode is lower than that of the FD mode lower. Therefore, we adjust the number of selected Con-FD modes in this part of user pairs by adjusting the factor α, that is, let the smaller Use Con-FD mode for user pairs, where the symbol For rounding up, Q is the number of user pairs whose serial numbers are lower than the uplink channel, α∈[0,1].

The NOMA-FD mode is used for transmission, and after the Con-FD mode is used for transmission, the method also includes:

For downlink users among the predetermined plurality of user pairs using the Con-FD mode, determine a third channel coefficient, where the third channel coefficient is the channel coefficient of the downlink channel of the user pair using the Con-FD mode;

sorting the third channel coefficients, acquiring the corresponding downlink users when the third channel coefficients are ranked the highest, and using the downlink users and uplink users as a first user pair;

For downlink users in a plurality of predetermined user pairs using the NOMA-FD mode, determine a fourth channel coefficient, where the fourth channel coefficient is the channel coefficient of the downlink channel of the user pair using the NOMA-FD mode;

Sorting the fourth channel coefficients, acquiring the downlink users corresponding to the highest ranked fourth channel coefficients, and using the downlink users and uplink users as a second user pair;

The first user pair and the second user pair are used as the initially selected user pair.

According to the result of channel detection, the steps of performing user pairing and selection of transmission mode are as follows:

Calculate the first maximum uplink and downlink sum rate of the uplink and downlink users of the first user pair in NOMA-FD mode, and calculate the second maximum uplink and downlink rate of the second user pair in Con-FD mode and rate;

If the first maximum uplink and downlink sum rate is greater than the second maximum uplink and downlink sum rate, then select the user pair corresponding to the first maximum uplink and downlink sum rate, and select the Con-FD mode for data transmission;

If the second maximum uplink and downlink sum rate is greater than or equal to the first maximum uplink and downlink sum rate, select the user pair corresponding to the second maximum uplink and downlink sum rate, and select the NOMA-FD mode for data transmission.

FIG. 6 is a partial algorithm flow chart of the transmission processing method provided by this embodiment.

As shown in the sum rate formulas of the above two modes, for the sum rate of NOMA-FD mode and Con-FD mode, when the base station transmits a large power, the term that plays a major role in the sum rate is |h _Bn | ² P _B /σ ² . That is to say, the size of the downlink channel |h _Bn | ² will have a major impact on the sum rate in the two modes.

For use of Con-FD mode For user pairs, sort the downlink channel |h _Bn | ² , select the user pair with the largest downlink channel |h _Bn | ² , obtain accurate channel information, and calculate the sum rate of this user pair.

For the use of NOMA-FD mode For user pairs, sort the downlink channel |h _Bn | ² , select the user pair with the largest downlink channel |h _Bn | ² , obtain accurate channel information, and calculate the sum rate of this user pair.

Then, traverse all uplink users, repeat the above steps, and select 2M or M pairs of users.

Finally, compare the sum rates of the selected 2M or M pairs of user pairs, and select the user pair with the largest sum rate for transmission.

It can be considered that the downlink users are divided into two parts, one part uses the NOMA-FD mode, and the other part uses the Con-FD mode. A downlink user is selected from the NOMA-FD mode, and a downlink user is selected from the Con-FD mode. That is, each uplink user has a NOMA-FD downlink user and a Con-FD downlink user, and 2M pairs are selected at this time. If α is 0, there are only user pairs in the NOMA-FD mode, which means there are only M pairs.

The above algorithm only needs to calculate the sum rate and channel detection for M pairs of users. Compared with the sum rate calculation and channel detection of MN pairs of users required by the exhaustive algorithm, the complexity and signaling overhead are greatly reduced.

FIG. 7 is a signaling flowchart of the transmission processing method provided by this embodiment.

As shown in Figure 7, the signaling process is described by taking 3 users as an example, where user 2 and user 3 are downlink users, and user 1 is an uplink user. It is assumed that the uplink and downlink channels are known, but the inter-user interference channel is unknown.

Step 1: The base station obtains the location information of the three users, and the base station roughly calculates the interference channel based on the location information, obtains the channel estimation result of the interference channel, and obtains the channel coefficient of the interference channel, that is, the second channel coefficient, and calculates the interference channel Channels and uplink channels are sorted.

That is to say, for each uplink user in the above step 11, the step of determining a plurality of second channel coefficients is specifically:

The base station performs preliminary estimation of the interference channel according to the position information of the uplink user and the predetermined downlink user, and obtains the estimation result of the interference channel;

According to the estimation result, the second channel coefficient is obtained.

Step 2: The base station performs preliminary selection of user pairs based on the above user pairing and mode selection algorithms, and sends channel detection instructions to the selected users.

Step 3: The selected user performs interference channel measurement and feeds back the channel information to the base station.

Step 4: The base station performs user pairing and mode selection based on the fed back channel information, and sends corresponding pairing information to corresponding users. The paired users perform uplink and downlink data transmission.

The transmission processing method provided by the embodiment of the present invention aims at a full-duplex system in the case of multiple users, and proposes a method for eliminating interference between users based on non-orthogonal multiple access, which is used to reduce interference between users; and proposes a A user pairing and mode selection algorithm improves network capacity while reducing channel detection between users and saving signaling overhead.

In order to fully understand the technical content of the present invention, on the basis of the foregoing embodiments, the transmission processing method provided in this embodiment is described in detail through experimental parameters.

Base station signal-to-noise ratio P _B /σ ² =-5:5:20dB; uplink user signal-to-noise ratio P _m /σ ² =0dB; number of uplink users M=2; number of downlink users N=4; self-interference coefficient η=1 . |h _mB | ² , |h _Bn | ² , |h _mn | ² obey the negative exponential distribution of λ=1. The number of experiments is 10000 time slots.

FIG. 8 is a schematic diagram of a simulation result of the transmission processing method provided in this embodiment.

As shown in Figure 8, the optimal selection curve represents the result obtained by the exhaustive method, and the user selection and mode selection results are optimal; the random selection curve represents a pair of uplink and downlink users randomly selected, respectively Calculate the sum rate in NOMA-FD mode and Con-FD mode, and select the mode corresponding to the maximum sum rate for transmission. Optimal selection and random selection can be used as standard algorithms for performance comparison.

The algorithm of the invention is better than random selection and close 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 when the SNR is low, the Con-FD sum rate is greater than that of NOMA-FD The probability is relatively high, and the use of the NOMA-FD mode (that is, the case of α=0) cannot be considered only. When the SNR is high, the throughput of α=0 is greater than α=1 and is very close to the optimal selection result, because at high SNR, the sum rate of NOMA-FD mode is greater than Con- For FD mode, it is more reasonable to only consider the use of NOMA-FD mode.

FIG. 9 shows a schematic structural diagram of a device for transmission processing provided by another embodiment of the present invention.

Referring to FIG. 9 , on the basis of the above embodiments, this embodiment provides a device for transmission processing, the device includes a determination module 71 and a sorting module 72 . Comparison module 73 and selection module 74, wherein:

The determination module 71 is used to determine a first channel coefficient and a plurality of second channel coefficients for each uplink user, the first channel coefficient is the channel coefficient of the uplink channel, and the second channel coefficient is the channel coefficient of the uplink user and the downlink user The channel coefficients of the interfering channels; the sorting module 72 is used to sort the first channel coefficients and the plurality of second channel coefficients from small to large, and record the position of the first channel coefficients in the sequence as the sequence number j, record the position of the second channel coefficient corresponding to a certain downlink user in the sequence as sequence number i; the comparison module 73 is used to compare i and j, and initially select a user pair according to the comparison result, and send a channel detection instruction To the initially selected user pair; the selection module 74 is used to perform user pairing and selection of transmission mode according to the result of channel detection.

The transmission processing device provided in this embodiment can be used to execute the method in the foregoing method embodiment, and details will not be described in this embodiment.

The device for transmission processing provided in this embodiment reduces the detection of channels between users and saves signaling overhead while improving network capacity.

Fig. 10 shows a schematic structural diagram of an electronic device provided by another embodiment of the present invention.

Referring to FIG. 10 , an electronic device provided by an 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 operable on the processor. Wherein, the memory 81 and the processor 82 communicate with each other through the bus 83 .

The processor 82 is configured to call the program instructions in the memory 81, so as to realize the method as shown in FIG. 1 when executing the program.

In another implementation manner, the processor implements the following method when executing the program:

The transmission mode includes NOMA-FD mode and Con-FD mode. The NOMA-FD mode regards the interference signal of the uplink user as a useful signal, uses serial interference cancellation at the downlink user end, and performs In a joint demodulation mode, the Con-FD mode is a mode in which only downlink signals are demodulated without processing interference signals.

In another implementation manner, the processor implements the following method when executing the program:

The step of comparing i and j, and according to the comparison result, initially selecting the user pair is specifically as follows:

If it is judged that i>j is known, the uplink user and the downlink user corresponding to the interference channel whose channel coefficient rank is i form a user pair, and the NOMA-FD mode is used for transmission; if it is judged that i<j, the uplink user and the channel coefficient The downlink users corresponding to the interference channels sorted by i form a user pair, and the Con-FD mode is used for transmission.

In another implementation manner, the processor implements the following method when executing the program:

If it is judged that after knowing i<j, before the user adopts the Con-FD mode, the method also includes:

Adjust the preset adjustment factor to adjust the number of user pairs using Con-FD mode.

In another implementation manner, the processor implements the following method when executing the program:

The NOMA-FD mode is used for transmission, and after the Con-FD mode is used for transmission, the method also includes:

For downlink users among the predetermined plurality of user pairs using the Con-FD mode, determine a third channel coefficient, where the third channel coefficient is the channel coefficient of the downlink channel of the user pair using the Con-FD mode;

sorting the third channel coefficients, acquiring the corresponding downlink users when the third channel coefficients are ranked the highest, and using the downlink users and uplink users as a first user pair;

For downlink users in a plurality of predetermined user pairs using the NOMA-FD mode, determine a fourth channel coefficient, where the fourth channel coefficient is the channel coefficient of the downlink channel of the user pair using the NOMA-FD mode;

Sorting the fourth channel coefficients, acquiring the downlink users corresponding to the highest ranked fourth channel coefficients, and using the downlink users and uplink users as a second user pair;

The first user pair and the second user pair are used as the initially selected user pair.

In another implementation manner, the processor implements the following method when executing the program:

According to the result of channel detection, the steps of performing user pairing and selection of transmission mode are as follows:

Calculate the first maximum uplink and downlink sum rate of the uplink and downlink users of the first user pair in NOMA-FD mode, and calculate the second maximum uplink and downlink rate of the second user pair in Con-FD mode and rate;

If the first maximum uplink and downlink sum rate is greater than the second maximum uplink and downlink sum rate, then select the user pair corresponding to the first maximum uplink and downlink sum rate, and select the Con-FD mode for data transmission;

If the second maximum uplink and downlink sum rate is greater than or equal to the first maximum uplink and downlink sum rate, select the user pair corresponding to the second maximum uplink and downlink sum rate, and select the NOMA-FD mode for data transmission.

In another implementation manner, the processor implements the following method when executing the program:

For each uplink user, the steps of determining multiple second channel coefficients are specifically:

The base station performs preliminary estimation of the interference channel according to the position information of the uplink user and the predetermined downlink user, and obtains the estimation result of the interference channel;

According to the estimation result, the second channel coefficient is obtained.

The electronic device provided in this embodiment can be used to execute the program corresponding to the method in the above method embodiment, and details will not be described in this embodiment.

In the electronic device provided in this embodiment, when the processor executes the program, the network capacity is increased, while the detection of channels between users is reduced, and signaling overhead is saved.

Another embodiment of the present invention provides a storage medium, where a computer program is stored on the storage medium, and when the program is executed by a processor, the steps shown in FIG. 1 are implemented.

In another implementation manner, when the program is executed by the processor, the following methods are implemented:

The transmission mode includes NOMA-FD mode and Con-FD mode. The NOMA-FD mode regards the interference signal of the uplink user as a useful signal, uses serial interference cancellation at the downlink user end, and performs In a joint demodulation mode, the Con-FD mode is a mode in which only downlink signals are demodulated without processing interference signals.

In another embodiment, when the program is executed by the processor, the following method is implemented: the step of comparing i and j, and initially selecting the user pair according to the comparison result is specifically as follows:

If it is judged that i>j is known, the uplink user and the downlink user corresponding to the interference channel whose channel coefficient rank is i form a user pair, and the NOMA-FD mode is used for transmission; if it is judged that i<j, the uplink user and the channel coefficient The downlink users corresponding to the interference channels sorted by i form a user pair, and the Con-FD mode is used for transmission.

In another embodiment, when the program is executed by the processor, the following method is implemented: if it is determined that i<j and before the user adopts the Con-FD mode, the method further includes:

Adjust the preset adjustment factor to adjust the number of user pairs using Con-FD mode.

In another embodiment, when the program is executed by the processor, the following method is implemented: after the transmission is performed in the NOMA-FD mode, and after the transmission is performed in the Con-FD mode, the method further includes:

For downlink users among the predetermined plurality of user pairs using the Con-FD mode, determine a third channel coefficient, where the third channel coefficient is the channel coefficient of the downlink channel of the user pair using the Con-FD mode;

sorting the third channel coefficients, acquiring the corresponding downlink users when the third channel coefficients are ranked the highest, and using the downlink users and uplink users as a first user pair;

For downlink users in a plurality of predetermined user pairs using the NOMA-FD mode, determine a fourth channel coefficient, where the fourth channel coefficient is the channel coefficient of the downlink channel of the user pair using the NOMA-FD mode;

Sorting the fourth channel coefficients, acquiring the downlink users corresponding to the highest ranked fourth channel coefficients, and using the downlink users and uplink users as a second user pair;

The first user pair and the second user pair are used as the initially selected user pair.

In another embodiment, when the program is executed by the processor, the following method is implemented: the step of performing user pairing and selection of the transmission mode according to the result of channel detection is specifically:

Calculate the first maximum uplink and downlink sum rate of the uplink and downlink users of the first user pair in NOMA-FD mode, and calculate the second maximum uplink and downlink rate of the second user pair in Con-FD mode and rate;

If the first maximum uplink and downlink sum rate is greater than the second maximum uplink and downlink sum rate, then select the user pair corresponding to the first maximum uplink and downlink sum rate, and select the Con-FD mode for data transmission;

If the second maximum uplink and downlink sum rate is greater than or equal to the first maximum uplink and downlink sum rate, select the user pair corresponding to the second maximum uplink and downlink sum rate, and select the NOMA-FD mode for data transmission.

In another embodiment, when the program is executed by the processor, the following method is implemented: for each uplink user, the step of determining multiple second channel coefficients is specifically:

The base station performs preliminary estimation of the interference channel according to the position information of the uplink user and the predetermined downlink user, and obtains the estimation result of the interference channel;

According to the estimation result, the second channel coefficient is obtained.

The storage medium provided in this embodiment implements the method in the foregoing method embodiment when the program is executed by a processor, which will not be repeated in this embodiment.

The storage medium provided by this embodiment reduces the detection of inter-user channels and saves signaling overhead while improving the network capacity

Those skilled in the art will appreciate that although some of the embodiments described herein include some features and not others that are included in other embodiments, combinations of features from different embodiments are meant to be within the scope of the invention. And form different embodiments.

Those skilled in the art can understand that each step in the embodiment can be realized by hardware, or by a software module running on one or more processors, or by a combination thereof. Those skilled in the art should understand that a microprocessor or a digital signal processor (DSP) may be used in practice to implement some or all functions of some or all components according to the embodiments of the present invention. The present invention can also be implemented as an apparatus or an apparatus program (for example, a computer program and a computer program product) for performing a part 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 can make various modifications and variations without departing from the spirit and scope of the present invention. within the bounds of the requirements.

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.