CN108322240B - Soft frequency division multiplexing method and device, large-scale multi-antenna system and storage medium - Google Patents
Soft frequency division multiplexing method and device, large-scale multi-antenna system and storage medium Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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- H—ELECTRICITY
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- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
- H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
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Abstract
The invention discloses a soft frequency division multiplexing method, which is used for controlling a large-scale multi-antenna system, wherein the large-scale multi-antenna system comprises a plurality of base stations, and the soft frequency division multiplexing method comprises the following steps: dividing the terminal of each cell into a center terminal and an edge terminal according to the distance between each terminal and the corresponding base station; completely different bandwidths are allocated to edge terminals of adjacent cells; and allocating a pilot sequence with a longer length to the edge terminal. The invention also discloses a soft frequency division multiplexing device, a large-scale multi-antenna system and a storage medium. The soft frequency division multiplexing method and device, the large-scale multi-antenna system and the storage medium of the invention multiplex the total bandwidth of the large-scale multi-antenna system and allocate different bandwidths for the edge terminals of the adjacent cells by dividing the edge terminals and the center terminal, and allocate longer pilot frequency sequences for the edge terminals, thereby reducing pilot frequency multiplexing and inhibiting pilot frequency pollution, and fully utilizing frequency spectrum resources to improve the data transmission performance of the edge terminals and the center terminal.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a soft frequency division multiplexing method and apparatus, a large-scale multi-antenna system, and a computer-readable storage medium.
Background
A large-scale multi-antenna system needs to acquire channel information of a terminal before data transmission to fully utilize spatial degrees of freedom to suppress interference. However, in order to guarantee the data transmission time in a single frame, the length of the pilot used for measuring the terminal channel is limited, so that the number of orthogonal pilots is limited (the maximum number of orthogonal pilots is equal to the length of the pilot), resulting in multiplexing of the pilots, and further, when the base station uses the pilots to perform channel estimation, the base station cannot accurately obtain the channel information of the terminal due to interference of the same pilots, and further, the data transmission performance of the terminal is affected, and pilot-pollution (pilot-pollution) occurs.
Therefore, a frequency division multiplexing technology is proposed in the related art, which divides the bandwidth of a large-scale multi-antenna system, and each adjacent cell uses different frequency bands for transmission. Due to the staggering of the frequency bands, the interference outside the cell on the data transmission of each cell terminal is greatly reduced, the problem of pilot frequency pollution is inhibited, and the data transmission performance is correspondingly improved. However, the frequency resources available for a large-scale multi-antenna system are limited, and after different frequency bands are divided into different cells, the frequency resources available for each cell are more limited, so that the frequency spectrum utilization rate is reduced, and the probability of co-channel interference is greatly increased.
Disclosure of Invention
The embodiment of the invention provides a soft frequency division multiplexing method and device, a large-scale multi-antenna system and a computer readable storage medium.
The soft frequency division multiplexing method of the embodiment of the invention is used for controlling a large-scale multi-antenna system, the large-scale multi-antenna system comprises a plurality of base stations, each base station covers a cell for the communication of terminals in the cell through the large-scale multi-antenna system, and the soft frequency division multiplexing method comprises the following steps:
dividing the terminal of each cell into a center terminal and an edge terminal according to the distance between each terminal and the corresponding base station;
allocating a total bandwidth of the massive multi-antenna system to each of the cells and allocating a first partial bandwidth of the total bandwidth to the edge terminal of the cell and a second partial bandwidth of the total bandwidth to the edge terminal of the adjacent cell, wherein the first partial bandwidth and the second partial bandwidth are not overlapped; and
and allocating pilot sequences with different lengths to the edge terminal and the center terminal, wherein the length of the pilot sequence allocated to the edge terminal is greater than that of the pilot sequence allocated to the center terminal.
In some embodiments, the step of dividing the terminals of each cell into a center terminal and an edge terminal according to the distance between each terminal and the corresponding base station comprises the steps of:
judging whether the distance between the terminal and the corresponding base station is greater than or equal to a preset distance;
determining the terminal to be the edge terminal when the distance is greater than or equal to the preset distance; and
and when the distance is smaller than the preset distance, determining the terminal as the center terminal.
In some embodiments, the allocated bandwidth of the center terminal is greater than the allocated bandwidth of the edge terminals.
In some embodiments, the soft frequency division multiplexing method further comprises the steps of:
and determining the bandwidth allocated to the central terminal of the corresponding cell according to the first part of bandwidth and the second part of bandwidth.
In some embodiments, no data is exchanged between the plurality of base stations.
The soft frequency division multiplexing device of the embodiment of the invention is used for controlling a large-scale multi-antenna system, the large-scale multi-antenna system comprises a plurality of base stations, the area served by the base stations is a cell, and the soft frequency division multiplexing device comprises:
a dividing module, configured to divide the terminal of each cell into a center terminal and an edge terminal according to a distance between each terminal and the corresponding base station;
a first allocating module, configured to allocate a total bandwidth of the massive multi-antenna system to each of the cells and allocate a first partial bandwidth of the total bandwidth to the edge terminal of the cell and allocate a second partial bandwidth of the total bandwidth to the edge terminal of the neighboring cell, wherein the first partial bandwidth is different from the second partial bandwidth; and
a second allocating module, configured to allocate pilot sequences with different lengths to the edge terminal and the center terminal, where the length of the pilot sequence allocated by the edge terminal is greater than the length of the pilot sequence allocated by the center terminal.
In some embodiments, the partitioning module comprises:
a judging unit, configured to judge whether a distance between the terminal and the corresponding base station is greater than or equal to a predetermined distance;
a first determining unit, configured to determine that the terminal is the edge terminal when the distance is greater than or equal to the predetermined distance; and
a second determining unit, configured to determine that the terminal is the center terminal when the distance is smaller than the predetermined distance.
In some embodiments, the central terminal is allocated a greater bandwidth than the edge terminals.
In some embodiments, the soft frequency division multiplexing device further comprises:
a determining module, configured to determine the bandwidth of the center terminal of the corresponding cell according to the first partial bandwidth and the second partial bandwidth.
In some embodiments, no data is exchanged between the plurality of base stations.
A large-scale multi-antenna system of an embodiment of the present invention includes:
a plurality of base stations;
a plurality of terminals;
one or more processors;
a memory; and
one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the programs comprising instructions for performing the soft frequency division multiplexing method.
The computer readable storage medium of an embodiment of the invention comprises a computer program for use in connection with a massive multi-antenna system, which computer program is executable by a processor to perform the method for soft frequency division multiplexing.
The soft frequency division multiplexing method and apparatus, the large-scale multi-antenna system, and the computer-readable storage medium according to embodiments of the present invention divide a terminal into a center terminal and an edge terminal based on a distance from the terminal to a corresponding base station, then allocate a total bandwidth of the large-scale multi-antenna system to each cell, allocate different portions of the total bandwidth to the center terminal and the edge terminal of each cell, and allocate different portions of the total bandwidth to edge terminals of neighboring cells of the cell according to the position of the cell, and in addition, allocate a longer pilot sequence to the edge terminal. Therefore, the frequency resources of a large-scale multi-antenna system can be fully utilized, the frequency bands between the edge terminals of the adjacent cells are different, the edge terminals have longer pilot sequences, the pilot pollution is further inhibited, the frequency spectrum utilization rate is improved, the probability of same frequency interference is greatly reduced, and the data transmission performance of the cells is improved.
Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic flow chart of a soft frequency division multiplexing method according to an embodiment of the present invention;
fig. 2 is a block diagram of a soft frequency division multiplexing device according to an embodiment of the present invention;
fig. 3 is a schematic view of an application scenario of a soft frequency division multiplexing method according to an embodiment of the present invention;
fig. 4 is a schematic view of an application scenario of a soft frequency division multiplexing method according to another embodiment of the present invention;
fig. 5 is a schematic diagram of the total bandwidth division of a large scale multi-antenna system of an embodiment of the present invention;
FIG. 6 is a frame structure diagram of an embodiment of the present invention;
fig. 7 is a flow chart of a soft frequency division multiplexing method according to another embodiment of the present invention;
FIG. 8 is a block diagram of a partitioning module according to an embodiment of the present invention;
fig. 9 is a schematic view of an application scenario of a soft frequency division multiplexing method according to still another embodiment of the present invention;
fig. 10 is a schematic view of an application scenario of a soft frequency division multiplexing method according to another embodiment of the present invention;
fig. 11 is a flowchart illustrating a soft frequency division multiplexing method according to still another embodiment of the present invention;
fig. 12 is a block diagram of a soft frequency division multiplexing device according to another embodiment of the present invention;
fig. 13 is a block schematic diagram of a large scale multiple antenna system of an embodiment of the present invention;
fig. 14 is a schematic connection diagram of a large-scale multi-antenna system and a computer-readable storage medium according to an embodiment of the present invention;
description of the main elements and symbols:
soft frequency division multiplexing device 10, large scale multi-antenna system 1000, base station 100, terminal 200, processor 300, memory 400, cell 800, computer readable storage medium 8000.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for the purpose of illustrating the embodiments of the present invention and are not to be construed as limiting the embodiments of the present invention.
In the description of the embodiments of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other suitable relationship. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or the first and second features being in contact, not directly, but via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different configurations of embodiments of the invention. In order to simplify the disclosure of embodiments of the invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, embodiments of the invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, embodiments of the present invention provide examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
Referring to fig. 1 and fig. 3, a soft frequency division multiplexing method according to an embodiment of the present invention is used for controlling a large-scale multi-antenna system 1000, where the large-scale multi-antenna system 1000 includes a plurality of base stations 100, each base station 100 covers a cell 800 for terminals 200 in the cell 800 to communicate through the large-scale multi-antenna system 1000, and an area covered by the cell 800 is an effective coverage area of signals of the base stations 100, and the soft frequency division multiplexing method includes the following steps:
s12: dividing the terminal 200 of each cell 800 into a center terminal and an edge terminal according to the distance between each terminal 200 and the corresponding base station 100;
s14: allocating the total bandwidth of the massive multi-antenna system 1000 to each cell 800, allocating a first part of the total bandwidth to edge terminals of the cell 800, and allocating a second part of the total bandwidth to edge terminals of an adjacent cell 800, wherein the first part of the total bandwidth and the second part of the total bandwidth are not overlapped; and
s16: and allocating pilot sequences with different lengths to the edge terminal and the center terminal, wherein the length of the pilot sequence allocated to the edge terminal is greater than that of the pilot sequence allocated to the center terminal.
Referring to fig. 2 and fig. 3, a soft frequency division multiplexing device 10 according to an embodiment of the present invention is configured to control a large-scale multi-antenna system 1000, where the large-scale multi-antenna system 1000 includes a plurality of base stations 100, each base station 100 covers a cell 800 for terminals 200 in the cell 800 to communicate through the large-scale multi-antenna system 1000, an area covered by the cell 800 is an effective coverage area of signals of the base stations 100, and the soft frequency division multiplexing device 10 includes a dividing module 12, a first allocating module 14, and a second allocating module 16. The dividing module 12 is configured to divide the terminals 200 of each cell 800 into a center terminal and an edge terminal according to a distance between each terminal 200 and the corresponding base station 100. The first allocating module 14 is configured to allocate the total bandwidth of the massive multi-antenna system 1000 to each cell 800 and allocate a first part of the total bandwidth to edge terminals of the cell 800 and a second part of the total bandwidth to edge terminals of an adjacent cell 800, where the first part of the total bandwidth is different from the second part of the total bandwidth. The second allocating module 16 allocates pilot sequences with different lengths to the edge terminal and the center terminal, and the length of the pilot sequence allocated to the edge terminal is greater than that of the pilot sequence allocated to the center terminal.
That is, the soft frequency division multiplexing method according to the embodiment of the present invention may be implemented by the soft frequency division multiplexing device 10 according to the embodiment of the present invention, wherein the step S12 may be implemented by the dividing module 12. Step S14 may be implemented by the first distribution module 14. Step S16 may be implemented by the second allocation module 16.
The soft frequency division multiplexing method, the soft frequency division multiplexing device 10 and the large-scale multi-antenna system 1000 according to the embodiments of the present invention divide the terminal 200 into a center terminal and an edge terminal based on the distance from the terminal 200 to the corresponding base station 100, then allocate the total bandwidth of the large-scale multi-antenna system 1000 to each cell 800, allocate different portions of the total bandwidth to the center terminal and the edge terminal of each cell 800 and allocate different portions of the total bandwidth to the edge terminals of the adjacent cells 800 of the cell 800 according to the position of the cell 800, and in addition, allocate a longer pilot sequence to the edge terminal. Therefore, the frequency resources of the large-scale multi-antenna system 1000 can be fully utilized, the frequency bands of the edge terminals of the adjacent cells 800 are different, the edge terminals have longer pilot sequences, the pilot pollution is further inhibited, the frequency spectrum utilization rate is improved, the probability of same frequency interference is greatly reduced, and the data transmission performance of the cells 800 is improved.
The terminal 200 according to the embodiment of the present invention includes, but is not limited to, a smart phone, a Personal Computer (PC), a tablet computer (PAD), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), and the like.
Specifically, the base station 100 (i.e., a public mobile communication base station) is a form of a radio station, and refers to a radio transceiver station that performs information transfer with a mobile phone terminal through a mobile communication switching center in a certain radio signal coverage area. The cell 800 is an area covered by radio signals of the base station 100.
Generally, in order to reduce the frequency interval of the interfering wireless signals between adjacent frequency bands, the frequency interval may be 200KHz, the total bandwidth may be divided into 125 wireless frequency bands from 890MHz, 890.2MHz, 890.4MHz, 890.6MHz, 890.8MHz, 891MHz, … …, 915MHz according to the frequency interval of 200KHz, each frequency band is numbered, and the number of these fixed frequencies is a frequency point from 1, 2, 3, 4, … …, 125. That is, different frequency points may represent different frequencies.
Referring to fig. 3 to 5, in some embodiments, the large scale multi-antenna system 1000 has 7 base stations 100, i.e., 7 cells 800, the base station 100 is located at the center of the cell 800, the radius of the cell 800 is R meters, and each cell 800 has K terminals 200. First, K terminals 200 are divided into edge terminals and center terminals according to the distance between the K terminals 200 and the base station 100, and then as shown in fig. 5, it can be understood that the edge terminals of each cell 800 are generally fewer than the center terminals, the total bandwidth of the large-scale multi-antenna system 1000 can be divided into 4 parts on average, one part is divided into the edge terminals, and 3 parts is divided into the center terminals, then mutually different bandwidths (as shown in fig. 4-5) are allocated to the edge terminals of adjacent cells 800, each bandwidth includes a plurality of frequency bands, different frequency bands are allocated between the edge terminals of adjacent cells 800 and between the edge terminals and the center terminals of each cell 800, each frequency band corresponds to a fixed frequency, and the terminals 200 can communicate with the base station 100 through the fixed frequency of one frequency band in the allocated bandwidths.
Therefore, the edge terminals of the adjacent cell 800 can use different frequency bands for communication, thereby reducing the probability of pilot frequency pollution, and fully utilizing the total bandwidth to reduce the same frequency interference, thereby improving the data transmission performance. And the central terminal can also utilize more bandwidth, thereby improving the data transmission performance of the central terminal.
The frame structure of the edge terminal and the central terminal for data transmission is shown in fig. 6, and it can be seen that one frame of data is composed of pilot and uplink and downlink data, and the edge terminal designs a longer pilot sequence (i.e. more time is allocated in one frame for pilot transmission). Therefore, more orthogonal pilot frequencies can be possessed, pilot frequency multiplexing is reduced, pilot frequency pollution is further inhibited, certain data transmission time can be correspondingly sacrificed under the condition that the total time of one frame is fixed and the transmission occupation time of the pilot frequencies is prolonged, but the edge terminal can be ensured to carry out channel estimation more accurately, although the time for data transmission is reduced, the error of the channel estimation is reduced, so that the interference borne by the data transmission is reduced, the data transmission speed is increased, and the total data transmission quantity in unit time is improved. Simulation verifies that the signal gain of the edge terminal of the cell 800 can reach 8-10Db and the signal gain of the center middle end of the cell 800 can reach 2 Db.
Referring to fig. 7, in some embodiments, step S12 includes the following steps:
s122: judging whether the distance between the terminal and the corresponding base station 100 is greater than or equal to a predetermined distance;
s124: determining the terminal 200 as an edge terminal when the distance is greater than or equal to the predetermined distance; and
s126: the terminal 200 is determined to be the center terminal when the distance is less than the predetermined distance.
Referring to fig. 8, in some embodiments, the dividing module includes a determining unit 122, a first determining unit 124, and a second determining unit 126. The judging unit 122 is configured to judge whether the distance between the terminal 200 and the corresponding base station 100 is greater than a predetermined distance. The first determining unit 124 is configured to determine that the terminal 200 is an edge terminal when the distance is greater than or equal to the predetermined distance. The second determination unit 126 is configured to determine that the terminal 200 is a center terminal when the distance is less than the predetermined distance.
That is, step S122 may be implemented by the dividing unit 122. Step S124 may be implemented by the first determination unit 124. Step S126 may be implemented by the second determination unit 126.
As such, whether the terminal 200 is an edge terminal or a center terminal can be quickly determined by the distance between the terminal 200 and the corresponding base station 100.
Specifically, referring to fig. 9, when the base station 100 communicates with the terminal 200, first, it is determined whether the distance between the terminal 200 and itself is greater than or equal to a predetermined distance (for example, the predetermined distance is 0.8 times of the radius R of the cell 800), and when the distance is greater than or equal to the predetermined distance (for example, 0.8R), the terminal 200 is determined to be an edge terminal. The terminal 200 is determined to be the center terminal when the distance is less than a predetermined distance (e.g., 0.8R).
Thus, the division of the terminal 200 can be performed quickly, and the corresponding frequency band can be allocated to the corresponding terminal 200 quickly.
In some embodiments, in addition to dividing the terminal 200 into an edge terminal and a center terminal according to the distance, the terminal 200 may be divided into the edge terminal and the center terminal according to at least one of the distance between the terminal 200 and the corresponding base station 100, the difference between the received power of the terminal 200 and the transmission power of the base station 100, and the signal-to-noise ratio of the terminal 200.
For example, the terminal 200 is divided into an edge terminal and a center terminal according to a difference (i.e., path loss) between the reception power of the terminal 200 and the transmission power of the base station 100. When the base station 100 communicates with the terminal 200, first, it determines whether a difference between the received power and the downlink transmission power is greater than or equal to a predetermined difference through RSRP (reference signal received power) reported by the terminal 200, determines that the terminal 200 is an edge terminal when the difference is greater than or equal to the predetermined difference, and determines that the terminal 200 is a center terminal when the difference is less than the predetermined difference. In this manner, the category of the terminal 200 can be determined quickly and more accurately.
Also for example, the categories of the terminals 200 are divided by the signal-to-noise ratios of the terminals 200. The signal-to-noise ratio can be obtained through CQI (channel quality indication) information reported by the terminal 200, or can be obtained through a ratio of strength of Sounding signal (Sounding reference signal) received by the base station 100 to noise power. The base station 100 determines whether the signal-to-noise ratio is greater than a predetermined threshold, determines that the terminal 200 is an edge terminal when the signal-to-noise ratio is less than the predetermined threshold, and determines that the terminal 200 is a center terminal when the signal-to-noise ratio is greater than or equal to the predetermined threshold.
Further, the terminal 200 may be divided into an edge terminal and a center terminal by a combination of distance and path loss, for example, by comprehensively determining weights different in distance and path loss; or the terminal 200 is divided into an edge terminal and a center terminal by a combination of distance and signal-to-noise ratio, for example, by comprehensively deciding weights for different distances and signal-to-noise ratios; or the terminal 200 is divided into an edge terminal and a center terminal by giving a combination of the path loss and the signal-to-noise ratio, for example, giving comprehensive judgment to weights of different path loss and signal-to-noise ratios; preferably, the terminal 200 can be divided into an edge terminal and a center terminal by a combination of distance, path loss and signal-to-noise ratio, for example, by comprehensively deciding the weights of the distance, path loss and signal-to-noise ratio.
In this way, the terminal 200 can be accurately divided into an edge terminal and a center terminal.
In some embodiments, the central terminal is allocated a greater bandwidth than the edge terminals.
Referring to fig. 5 and 10, in general, the edge terminals only occupy a small portion of all terminals 200 in the cell 800, and the center terminal occupies a large portion of all terminals 200 in the cell 800, so the bandwidth allocated to the center terminal may be larger than the bandwidth allocated to the edge terminals, for example, the bandwidth allocated to the center terminal may be three times of the bandwidth allocated to the edge terminals, that is, the total bandwidth is divided into 4 portions, one portion is allocated to the edge terminals, and three portions are allocated to the center terminals. Therefore, the central terminal and the edge terminal can have enough bandwidth, the total bandwidth is fully utilized to reduce the same frequency interference, and the data transmission performance of the central terminal and the edge terminal is improved.
In some embodiments, the ratio of the bandwidths allocated to the edge terminal and the center terminal to the total bandwidth of the corresponding cell 800 may be determined in an auxiliary manner according to the ratio of the numbers of the edge terminal and the center terminal. For example, generally, when the number of edge terminals is less than 20% of all the terminals 200, the ratio of the bandwidth allocated to the edge terminals and the bandwidth allocated to the center terminals is 1:3, and when the number of edge terminals of the cell 800 is 500 and the number of center terminals is 1000, the ratio of the bandwidth allocated to the edge terminals is one third of all the terminals 200, which may be adjusted to a higher ratio, for example, the ratio of the total bandwidth is divided into 5 parts, the edge terminals occupy 2 parts, and the center terminals occupy 3 parts, respectively, and the ratio becomes 2: 3. In this way, when there are more edge terminals and fewer center terminals in the cell 800, more bandwidth can be allocated to the edge terminals to ensure the data transmission performance of the edge terminals.
Referring to fig. 11, in some embodiments, the soft frequency division multiplexing method further includes the following steps:
s18: and determining the bandwidth allocated to the central terminal of the corresponding cell 800 according to the first part of bandwidth and the second part of bandwidth.
Referring to fig. 12, in some embodiments, the soft frequency division multiplexing device 10 includes a determining module 18. The determining module 18 is configured to determine the bandwidth of the center terminal of the corresponding cell 800 according to the first part of bandwidth or the second part of bandwidth.
That is, step S18 may be implemented by determination module 18.
Therefore, the bandwidths allocated to the center terminal of the cell 800 corresponding to the first partial bandwidth and the second partial bandwidth are determined through the first partial bandwidth and the second partial bandwidth, so that the co-channel interference of the center terminal and the edge terminal is reduced while the frequency resources of the large-scale multi-antenna system are fully utilized, and the data transmission performance of the cell 800 is improved.
Specifically, as shown in fig. 4, the bandwidth of the edge terminal of one cell 800 is regarded as the first partial bandwidth, the bandwidth of the adjacent cell 800 of the cell 800 may be regarded as the second partial bandwidth, for example, the bandwidth of the edge terminal of the cell 1 is regarded as the first partial bandwidth, the bandwidth of the edge terminal of the cell 2 is regarded as the second partial bandwidth, and for example, the bandwidth of the edge terminal of the cell 2 is regarded as the first partial bandwidth, and the bandwidth of the edge terminal of the adjacent cell 3 is regarded as the second partial bandwidth, that is, the bandwidths of the edge terminals of the two adjacent cells are regarded as the first partial bandwidth and the second partial bandwidth, respectively, so that the bandwidths of the edge terminals of the two adjacent cells are ensured to be different. Determining the bandwidth occupied by the center terminal of the corresponding cell 800 according to the bandwidth allocated to the edge terminals of the cells 1 to 7, if the bandwidth allocated to the edge terminal of the cell 1 is bandwidth 1, the bandwidth allocated to the center terminal of the cell 1 is bandwidth 2-4, and the bandwidth allocated to the edge terminal of the cell 2 is bandwidth 3, the bandwidth allocated to the center terminal of the cell 2 is bandwidths 1, 2 and 4, and the bandwidths allocated to the center terminals of the other cells 800 can be obtained by the same method. Thus, it can be ensured that the edge terminals of the adjacent cells 800 can be allocated to different frequency bands, thereby suppressing pilot pollution between different cells 800 and improving the data transmission speed of the edge terminals.
In some embodiments, no data is exchanged between the plurality of base stations 100.
In this way, after the bandwidths are allocated to the plurality of base stations 100, the base stations 100 do not need to perform data exchange and cooperation to adjust the bandwidth of the edge terminal, but need to determine whether the terminal 200 is the center terminal or the edge terminal, so as to fixedly provide the allocated bandwidths for the edge terminal and the center terminal, thereby reducing the data processing burden of the base stations 100.
Referring to fig. 13, a large-scale multi-antenna system 1000 according to an embodiment of the present invention includes a plurality of base stations 100, a plurality of terminals 200, one or more processors 300, a memory 400, and one or more programs. Wherein one or more programs are stored in the memory 400 and configured to be executed by the one or more processors 300, the programs including instructions for performing the soft frequency division multiplexing method of any of the embodiments described above.
For example, the program includes instructions for performing the following soft frequency division multiplexing method:
s12: dividing the terminal 200 of each cell 800 into a center terminal and an edge terminal according to the distance between each terminal 200 and the corresponding base station 100;
s14: allocating the total bandwidth of the large-scale multi-antenna system to each cell 800, allocating a first part of the total bandwidth to the edge terminal of the cell 800 and allocating a second part of the total bandwidth to the edge terminal of the adjacent cell 800, wherein the first part of the bandwidth and the second part of the bandwidth are not overlapped; and
s16: and allocating pilot sequences with different lengths to the edge terminal and the center terminal, wherein the length of the pilot sequence allocated to the edge terminal is greater than that of the pilot sequence allocated to the center terminal.
Referring to fig. 14, a computer readable storage medium 8000 according to an embodiment of the present invention includes a computer program for use with the massive multi-antenna system 1000. The computer program may be executed by the processor 300 to perform the soft frequency division multiplexing method of any of the above embodiments.
For example, the computer program may be executed by the processor 300 to perform the following soft frequency division multiplexing method:
s12: dividing the terminal 200 of each cell 800 into a center terminal and an edge terminal according to the distance between each terminal 200 and the corresponding base station 100;
s14: allocating the total bandwidth of the large-scale multi-antenna system to each cell 800, allocating a first part of the total bandwidth to the edge terminal of the cell 800 and allocating a second part of the total bandwidth to the edge terminal of the adjacent cell 800, wherein the first part of the bandwidth and the second part of the bandwidth are not overlapped; and
s16: and allocating pilot sequences with different lengths to the edge terminal and the center terminal, wherein the length of the pilot sequence allocated to the edge terminal is greater than that of the pilot sequence allocated to the center terminal.
The soft frequency division multiplexing method, the soft frequency division multiplexing device 10, the large-scale multi-antenna system 1000, and the computer-readable storage medium 8000 according to the embodiments of the present invention divide the terminal 200 into a center terminal and an edge terminal based on the distance from the terminal 200 to the corresponding base station 100, then allocate the total bandwidth of the large-scale multi-antenna system 1000 to each cell 800, allocate different portions of the total bandwidth to the center terminal and the edge terminal of each cell 800 and allocate different portions of the total bandwidth to the edge terminals of the neighboring cells 800 of the cell 800 according to the position of the cell 800, and in addition, allocate a longer pilot sequence to the edge terminals. Therefore, the frequency resources of the large-scale multi-antenna system 1000 can be fully utilized, the frequency bands of the edge terminals of the adjacent cells 800 are different, the edge terminals have longer pilot sequences, the pilot pollution is further inhibited, the frequency spectrum utilization rate is improved, the probability of same frequency interference is greatly reduced, and the data transmission performance of the cells 800 is improved.
In the description herein, references to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example" or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processing module-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (IPM overcurrent protection circuit) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of embodiments of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A soft frequency division multiplexing method for controlling a large-scale multi-antenna system, the large-scale multi-antenna system including a plurality of base stations, each of the base stations covering a cell for terminals in the cell to communicate via the large-scale multi-antenna system, the soft frequency division multiplexing method comprising the steps of:
dividing the terminal of each cell into a center terminal and an edge terminal according to the distance between each terminal and the corresponding base station;
allocating a total bandwidth of the massive multi-antenna system to each of the cells and allocating a first partial bandwidth of the total bandwidth to the edge terminal of the cell and a second partial bandwidth of the total bandwidth to the edge terminal of the adjacent cell, wherein the first partial bandwidth and the second partial bandwidth are not overlapped; the bandwidth allocated to the central terminal is greater than the bandwidth allocated to the edge terminal, the sum of the bandwidth allocated to the central terminal and the bandwidth allocated to the edge terminal is the total bandwidth, the bandwidth allocated to the central terminal does not overlap with the bandwidth allocated to the edge terminal, and the proportion of the bandwidth allocated to the edge terminal and the central terminal in the total bandwidth is determined according to the quantity proportion of the edge terminal and the central terminal; and
and allocating pilot sequences with different lengths to the edge terminal and the center terminal, wherein the length of the pilot sequence allocated to the edge terminal is greater than that of the pilot sequence allocated to the center terminal.
2. The soft frequency division multiplexing method of claim 1, wherein the step of dividing the terminals of each of the cells into center terminals and edge terminals according to a distance between each of the terminals and the corresponding base station comprises the steps of:
judging whether the distance between the terminal and the corresponding base station is greater than or equal to a preset distance;
determining the terminal to be the edge terminal when the distance is greater than or equal to the preset distance; and
and when the distance is smaller than the preset distance, determining the terminal as the center terminal.
3. The soft frequency division multiplexing method of claim 1 wherein the soft frequency division multiplexing method further comprises the steps of:
and determining the bandwidth allocated to the central terminal of the corresponding cell according to the first part of bandwidth and the second part of bandwidth.
4. The soft frequency division multiplexing method of claim 1 wherein no data is exchanged between the plurality of base stations.
5. A soft frequency division multiplexing device for controlling a massive multi-antenna system, the massive multi-antenna system comprising a plurality of base stations, each of the base stations covering a cell for terminals in the cell to communicate through the massive multi-antenna system, the soft frequency division multiplexing device comprising:
a dividing module, configured to divide the terminal of each cell into a center terminal and an edge terminal according to a distance between each terminal and the corresponding base station;
a first allocating module, configured to allocate a total bandwidth of the massive multi-antenna system to each of the cells and allocate a first partial bandwidth of the total bandwidth to the edge terminal of the cell and allocate a second partial bandwidth of the total bandwidth to the edge terminal of the neighboring cell, wherein the first partial bandwidth is different from the second partial bandwidth; the bandwidth allocated to the central terminal is greater than the bandwidth allocated to the edge terminal, the sum of the bandwidth allocated to the central terminal and the bandwidth allocated to the edge terminal is the total bandwidth, the bandwidth allocated to the central terminal does not overlap with the bandwidth allocated to the edge terminal, and the proportion of the bandwidth allocated to the edge terminal and the central terminal in the total bandwidth is determined according to the quantity proportion of the edge terminal and the central terminal; and
and the second distribution module distributes pilot sequences with different lengths to the edge terminal and the center terminal, wherein the length of the pilot sequence distributed by the edge terminal is greater than that of the pilot sequence distributed by the center terminal.
6. The soft frequency division multiplexing device of claim 5, wherein the partitioning module comprises:
a judging unit, configured to judge whether a distance between the terminal and the corresponding base station is greater than or equal to a predetermined distance;
a first determining unit, configured to determine that the terminal is the edge terminal when the distance is greater than or equal to the predetermined distance; and
a second determining unit, configured to determine that the terminal is the center terminal when the distance is smaller than the predetermined distance.
7. The soft frequency division multiplexing device of claim 5, wherein the soft frequency division multiplexing device further comprises:
a determining module, configured to determine the bandwidth of the center terminal of the corresponding cell according to the first partial bandwidth and the second partial bandwidth.
8. The soft frequency division multiplexing device of claim 5 wherein no data is exchanged between the plurality of base stations.
9. A massive multi-antenna system, comprising:
a plurality of base stations;
a plurality of terminals;
one or more processors;
a memory; and
one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the programs comprising instructions for performing the soft frequency division multiplexing method of any of claims 1-4.
10. A computer-readable storage medium, comprising a computer program for use in conjunction with a massive multi-antenna system, the computer program being executable by a processor to perform the soft frequency division multiplexing method of any of claims 1-4.
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| PCT/CN2019/070280 WO2019134666A1 (en) | 2018-01-04 | 2019-01-03 | Soft frequency division multiplexing method and device, large-scale multi-antenna system, and storage medium |
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| CN109150259B (en) * | 2018-09-06 | 2021-04-27 | 华北电力大学（保定） | Dynamic migration pilot frequency distribution method based on Massive MIMO system |
| CN111246573B (en) * | 2018-11-28 | 2023-04-25 | ***通信集团浙江有限公司 | Method and device for reducing inter-cell interference of large-scale array antenna base station |
| CN113630888A (en) * | 2021-09-18 | 2021-11-09 | 江苏亨鑫众联通信技术有限公司 | BWP switching method and related equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102790969A (en) * | 2011-05-16 | 2012-11-21 | 普天信息技术研究院有限公司 | Method for allocating border frequency bands in upstream interference |
| CN106549884A (en) * | 2015-12-31 | 2017-03-29 | 南方科技大学 | Channel estimation methods and system |
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| CN101801091B (en) * | 2010-01-28 | 2012-11-14 | 北京邮电大学 | Method and device for allocating resources in OFDM/MIMO system |
| US9197358B2 (en) * | 2012-05-18 | 2015-11-24 | Dali Systems Co., Ltd. | Method and system for soft frequency reuse in a distributed antenna system |
| CN105472745B (en) * | 2014-09-04 | 2020-09-08 | 北京三星通信技术研究有限公司 | Method and equipment for allocating sounding pilot signal resources |
| CN105049098B (en) * | 2015-06-15 | 2018-07-17 | 西安交通大学 | The portion of pilot multiplexing method of pilot pollution is overcome in extensive mimo system |
| CN105049166B (en) * | 2015-08-17 | 2017-11-28 | 清华大学 | Pilot distribution method based on user's geographical location information in extensive antenna cells |
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| CN102790969A (en) * | 2011-05-16 | 2012-11-21 | 普天信息技术研究院有限公司 | Method for allocating border frequency bands in upstream interference |
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