CN114745067B - Quick NC-OFDM communication resource allocation method - Google Patents

Quick NC-OFDM communication resource allocation method Download PDF

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CN114745067B
CN114745067B CN202210354344.7A CN202210354344A CN114745067B CN 114745067 B CN114745067 B CN 114745067B CN 202210354344 A CN202210354344 A CN 202210354344A CN 114745067 B CN114745067 B CN 114745067B
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power
bit
distribution
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CN114745067A (en
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叶中付
杨会超
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University of Science and Technology of China USTC
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mobile Radio Communication Systems (AREA)
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Abstract

The invention discloses a rapid NC-OFDM communication resource allocation method, which comprises the following steps: step 1, calculating the power required by each sub-channel for transmitting 1-bit data according to a channel condition result perceived by a frequency spectrum and the transmitted bit error rate requirement; step 2, according to the power required by each sub-channel for transmitting 1 bit of data obtained in the step 1, selecting the sub-channel for actually transmitting the data based on a threshold comparison criterion; step 3, bit power distribution of the sub-channels in the initialization step 2 is carried out based on the water injection idea, the bit number of the sub-channel initialization distribution is rounded down and the power of the sub-channel distribution is recalculated, and the bit power initial distribution result of the actual transmission sub-channels is obtained; and 4, calculating a sub-channel power difference value based on the power corresponding to the sub-channel bit number before and after the downward rounding in the step 3, selecting a sub-channel with the smallest power difference value, and distributing the residual power to the sub-channel at one time to finish the final distribution of the bit power. The method can realize rapid and effective bit power distribution and improve the efficiency of resource distribution.

Description

Quick NC-OFDM communication resource allocation method
Technical Field
The present invention relates to a method for allocating resources in communications, and in particular, to a fast NC-OFDM communication resource allocation method.
Background
With the rapid development of communication technology, the transmitted information also has explosive growth, and the spectrum resource is particularly important. The time and number of users with spectrum authorization in using the spectrum are random, resulting in lower spectrum utilization. The spectrum sensing technology can sense the spectrum hole and provide the spectrum hole for the unauthorized user, so that the unauthorized user can utilize the spectrum hole to transmit information in a free time period of the authorized user, and the utilization rate of spectrum resources is improved. However, some current resource allocation methods have problems of high computational complexity, etc., which may cause unauthorized users to fail to exit in time when the authorized users use the method, and affect communication of the authorized users. Although a fast NC-OFDM satellite communication bit power allocation method (zl 20201338320. X) improves the problem of high computational complexity of the greedy algorithm and the practical water-filling algorithm by using the steps of overall adjusting the bit number, multiple iterative solutions are still needed in the subsequent adjustment process, and the sub-channels to be transmitted are selected by using a single threshold (average power), which is likely to cause that some sub-channels close to the transmission condition cannot be transmitted, so that the spectrum resources cannot be utilized to the maximum. Therefore, it is necessary to research new and rapid resource allocation algorithms to improve the utilization of frequency resources.
Disclosure of Invention
The technical solution of the invention is as follows: the method solves the problems of complex overall adjustment, single transmission sub-channel selection and the like in the prior art, provides a rapid NC-OFDM communication resource allocation method, maximizes the number of sub-channels to be transmitted by using a broader threshold, maximizes the number of bits transmitted by the sub-channels with the most possible number of transmission bits by one-time overall adjustment, and greatly improves the speed and efficiency of communication resource allocation.
The invention aims at realizing the following technical scheme, and a rapid NC-OFDM communication resource allocation method comprises the following steps:
step 1, calculating the power required by each sub-channel for transmitting 1-bit data according to a channel condition result perceived by a frequency spectrum and the transmitted bit error rate requirement;
step 2, according to the power required by each sub-channel for transmitting 1 bit of data obtained in the step 1, selecting the sub-channel for actually transmitting the data based on a threshold comparison criterion;
step 3, bit power distribution of the sub-channels in the initialization step 2 is carried out based on the water injection idea, the bit number of the sub-channel initialization distribution is rounded down and the power of the sub-channel distribution is recalculated, and the bit power initial distribution result of the actual transmission sub-channels is obtained;
and 4, calculating a sub-channel power difference value based on the power corresponding to the sub-channel bit number before and after the downward rounding in the step 3, selecting a sub-channel with the smallest power difference value, and distributing the residual power to the sub-channel at one time to finish the final distribution of the bit power.
Further, the step of calculating the power required for transmitting 1-bit data per sub-channel according to the result of the spectrum-aware channel condition and the transmitted bit error rate requirement comprises:
based on spectrum perceived channel conditions, including channel gain H i And noise floor N i ，i＝1,2,…,n c ，n c Representing the number of sub-channels scanned, calculating the power required to transmit 1 bit of data per sub-channel:
wherein Γ= -ln (5 BER)/1.5 represents a signal-to-noise ratio gap, BER represents a bit error rate constraint required for transmitting data, and i represents a modulo operation. By pre-calculating the power required by each sub-channel to transmit 1 bit of data and comparing the power with the power threshold in the subsequent step, the iterative solution of the water injection constant can be avoided.
The step of selecting the sub-channel for actually transmitting data based on the threshold comparison criterion according to the power required by each sub-channel for transmitting 1 bit data obtained in the step 1 comprises the following steps:
for channel i, if P i 0 The method meets the following conditions:
P i 0 ＞th
indicating that channel i is too bad for transmitting data, then the subchannel is discarded. The number n of sub-channels of the actual transmission data can be obtained by comparison u . th represents a preset power threshold, which may select the average power of transmission, or other values, such as the median of the power of transmitting 1 bit data of a subchannel, the average of the power of transmitting 1 bit data of an adjacent subchannel, etc. By more widely defining the threshold, the number of the transmitted sub-channels can be flexibly adjusted, so that some sub-channels close to the transmission power limit can be transmitted as much as possible, and the utilization rate of spectrum resources is improved.
The step of initializing the bit power allocation of the sub-channels in the step 2 based on the water injection idea, rounding down the bit number of the sub-channel initialization allocation and re-calculating the power allocated by the sub-channels, and obtaining the bit power initial allocation result of the actual transmission sub-channels comprises the following steps:
since the number of the sub-channels for transmitting data is determined, the step that the water injection constant needs to be solved iteratively by the original water injection algorithm is avoided, namely the water injection constant K can be directly obtained, namely:
wherein P is sum Is the total power transmitted.
According to the idea of water filling, the allocated power of each sub-channel can be obtained as follows:
and the number of bits allocated per subchannel:
the bit allocation result obtained by the calculation is continuous, that is, the bits allocated by each sub-channel are continuous and may not be integers, however, in the actual transmission process, the bits must be transmitted in the form of integers, so that the result of the calculation needs to be rounded down, and the bits transmitted by each sub-channel are ensured to be integers, so that the final initial allocation result of the bits of each sub-channel can be obtained as follows:
wherein,,representing a downward rounding operation; according to the bits initially allocated to each sub-channel, calculating the initial allocation power of each sub-channel as follows:
this step is mainly related to the threshold selection in step 2. Through the selection of the threshold in the step 2, more sub-channels capable of being transmitted can be obtained in the step, so that not only can idle sub-channels be utilized as much as possible, but also residual power can be utilized as much as possible in subsequent one-time adjustment to achieve maximum transmission data.
The step of calculating the power difference of the sub-channels based on the power corresponding to the sub-channel bit number before and after the downward rounding in the step 3, selecting the sub-channel with the smallest power difference, and distributing the residual power to the sub-channel at one time, and the step of completing the distribution of the final bit power comprises the following steps:
calculating the difference value of power before and after rounding down the number of sub-channel bits:
and selecting the sub-channel i' with the smallest power difference, namely delta P i′ The method meets the following conditions:
ΔP i′ ＝minΔP i
if there are a plurality of sub-channels with the smallest power difference, the least sub-channel with the current allocated bit number is selected as the sub-channel i' needing to be adjusted. Calculating the total power remaining before and after water injection:
after selecting the sub-channel i' to be allocated, the remaining total power P left All of which are allocated to the sub-channel and the number of bits allocated thereto is calculated:
and finishing final bit power distribution. According to the adjustment process, the remaining power is distributed by one-time adjustment, so that the complexity of acquiring a final distribution result through multiple times of adjustment in the prior art is avoided, the number of bits to be transmitted can be distributed to the greatest extent, and the quick and effective distribution of communication resources is realized.
Compared with the prior art, the invention has the advantages that:
the existing technical schemes mainly have the problems of high computational complexity, singleness of available sub-channel selection, requirement for multiple adjustment to complete resource allocation and the like. The technical scheme provided by the invention can be seen that the invention has the following advantages: by defining the threshold more broadly, the situation that some sub-channels close to the transmission condition cannot be used for transmission in the prior art is avoided, so that the selection of the sub-channels is more flexible, and the utilization rate of spectrum resources is further improved; meanwhile, the selection of the available sub-channels avoids the problem that the water injection constant in the water injection method needs iterative computation, and reduces the computation complexity of the invention; in addition, for the distribution of the subsequent bits and power, the invention adopts the sub-channel with the minimum power change before and after the downward rounding of the bit number of each sub-channel to distribute the power and the bits at one time, thereby avoiding the complexity of the prior art that the distribution is completed by multiple times of adjustment, further accelerating the speed and the efficiency of resource distribution and improving the applicability of the invention in practice.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a fast NC-OFDM communication resource allocation method according to an embodiment of the present invention;
fig. 2 shows the bit error rate ber=10 according to the embodiment of the present invention -2 The relation between the number of bits and the signal to noise ratio is ideal and practical.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is evident that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
As shown in fig. 1, the embodiment of the present invention provides a fast NC-OFDM communication resource allocation method, including the following steps:
step 1, calculating the power required by each sub-channel for transmitting 1-bit data according to the channel condition result perceived by the frequency spectrum and the bit error rate requirement of transmission.
Based on spectrum perceived channel conditions, including channel gain H i And noise floor N i ，i＝1,2,…,n c ，n c Representing the number of sub-channels scanned, calculating the power required to transmit 1 bit of data per sub-channel:
wherein Γ= -ln (5 BER)/1.5 represents a signal-to-noise ratio gap, BER represents a bit error rate constraint required for transmitting data, and i represents a modulo operation. By pre-calculating the power required by each sub-channel to transmit 1 bit of data and comparing the power with the power threshold in the subsequent step, the iterative solution of the water injection constant can be avoided.
And 2, according to the power required by each sub-channel for transmitting 1-bit data obtained in the step 1, selecting the sub-channel for actually transmitting the data based on a threshold comparison criterion.
For channel i, if P i 0 The method meets the following conditions:
P i 0 ＞th
indicating that channel i is too bad for transmitting data, then the subchannel is discarded. The number n of sub-channels of the actual transmission data can be obtained by comparison u . th represents a preset power threshold, which may select the average power of transmission, or other values, such as the median of the power of transmitting 1 bit data of a subchannel, the average of the power of transmitting 1 bit data of an adjacent subchannel, etc. By defining the threshold more broadly, one canThe number of the sub-channels transmitted is flexibly adjusted, so that some sub-channels close to the limit of transmission power are transmitted as much as possible, and the utilization rate of spectrum resources is improved.
And step 3, carrying out bit power allocation of the sub-channels in the initialization step 2 based on the water injection idea, rounding down the bit number of the sub-channel initialization allocation, and re-calculating the power allocated by the sub-channels to obtain the bit power initial allocation result of the actual transmission sub-channels.
Since the number of the sub-channels for transmitting data is determined, the step that the water injection constant needs to be solved iteratively by the original water injection algorithm is avoided, namely the water injection constant K can be directly obtained, namely:
wherein P is sum Is the total power transmitted.
According to the idea of water filling, the allocated power of each sub-channel can be obtained as follows:
and the number of bits allocated per subchannel:
the bit allocation result obtained by the calculation is continuous, that is, the bits allocated by each sub-channel are continuous and may not be integers, however, in the actual transmission process, the bits must be transmitted in the form of integers, so that the result of the calculation needs to be rounded down, and the bits transmitted by each sub-channel are ensured to be integers, so that the final initial allocation result of the bits of each sub-channel can be obtained as follows:
wherein,,representing a downward rounding operation; according to the bits initially allocated to each sub-channel, calculating the initial allocation power of each sub-channel as follows:
this step is mainly related to the threshold selection in step 2. Through the selection of the threshold in the step 2, more sub-channels capable of being transmitted can be obtained in the step, so that not only can idle sub-channels be utilized as much as possible, but also residual power can be utilized as much as possible in subsequent one-time adjustment to achieve maximum transmission data.
And 4, calculating a sub-channel power difference value based on the power corresponding to the sub-channel bit number before and after the downward rounding in the step 3, selecting a sub-channel with the smallest power difference value, and distributing the residual power to the sub-channel at one time to finish the final distribution of the bit power.
Calculating the difference value of power before and after rounding down the number of sub-channel bits:
and selecting the sub-channel i' with the smallest power difference, namely delta P i′ The method meets the following conditions:
ΔP i′ ＝minΔP i
if there are a plurality of sub-channels with the smallest power difference, the least sub-channel with the current allocated bit number is selected as the sub-channel i' needing to be adjusted. Calculating the total power remaining before and after water injection:
after selecting the sub-channel i' to be allocated, the remaining total power P left All of which are allocated to the sub-channel and the number of bits allocated thereto is calculated:
and finishing final bit power distribution. According to the adjustment process, the remaining power is distributed by one-time adjustment, so that the complexity of acquiring a final distribution result through multiple times of adjustment in the prior art is avoided, the number of bits to be transmitted can be distributed to the greatest extent, and the quick and effective distribution of communication resources is realized.
Fig. 2 shows the bit error rate ber=10 -2 The relation between the number of bits and the signal to noise ratio is ideal and practical. It can be seen from the figure that the number of bits in an ideal case can be transmitted continuously, whereas in practice the number of bits can only be transmitted in integers, resulting in a situation where power remains. The invention integrally places the residual power in the sub-channel with the minimum power change, increases the number of bit transmission with the maximum possibility, greatly reduces the calculation complexity in the resource allocation, and further improves the practicability of the invention.
From the description of the above embodiments, it will be apparent to those skilled in the art that the above embodiments may be implemented in software, or may be implemented by means of software plus a necessary general hardware platform. With such understanding, the technical solutions of the foregoing embodiments may be embodied in a software product, where the software product may be stored in a nonvolatile storage medium (may be a CD-ROM, a U-disk, a mobile hard disk, etc.), and include several instructions for causing a computer device (may be a personal computer, a server, or a network device, etc.) to perform the methods of the embodiments of the present invention.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (1)

1. A fast NC-OFDM communication resource allocation method, comprising:
step 1, calculating the power required by each sub-channel for transmitting 1-bit data according to a channel condition result perceived by a frequency spectrum and the transmitted bit error rate requirement;
step 2, according to the power required by each sub-channel for transmitting 1 bit of data obtained in the step 1, selecting the sub-channel for actually transmitting the data based on a threshold comparison criterion;
step 3, bit power distribution of the sub-channels in the initialization step 2 is carried out based on the water injection idea, the bit number of the sub-channel initialization distribution is rounded down and the power of the sub-channel distribution is recalculated, and the bit power initial distribution result of the actual transmission sub-channels is obtained;
step 4, calculating a sub-channel power difference value based on the power corresponding to the sub-channel bit number before and after the downward rounding in the step 3, selecting a sub-channel with the smallest power difference value, and distributing the residual power to the sub-channel at one time to finish the final distribution of the bit power;
the step 1 is specifically implemented as follows:
based on spectrum perceived channel conditions, including channel gain H i And noise floor N i ，i＝1,2,…,n c ，n c Representing the number of sub-channels scanned, calculating the power required to transmit 1 bit of data per sub-channel:
wherein Γ= -ln (5 BER)/1.5 represents a signal-to-noise ratio gap, BER represents a bit error rate constraint required for transmitting data, |represents a modulo operation;
the step 2 is specifically implemented as follows:
for channel i, if P i 0 The method meets the following conditions:
P i 0 >th
indicating that the condition of channel i is not suitable for transmitting data, discarding the sub-channel; the number n of sub-channels of the actual transmission data is obtained through comparison u Th represents a preset power threshold;
the step 3 is specifically implemented as follows:
water injection constant K:
wherein P is sum Is the total power of the emission;
according to the idea of water injection, the allocated power of each sub-channel is obtained as follows:
and the number of bits allocated per subchannel:
and rounding down the calculated result to ensure that the transmitted bit of each sub-channel is an integer, and obtaining the final initial allocation result of the bit of each sub-channel is as follows:
wherein,,representing a downward rounding operation; based on initial division per sub-channelThe allocated bits, the initial allocation power of each sub-channel is calculated as:
the step 4 is specifically implemented as follows:
calculating the difference value of power before and after rounding down the number of sub-channel bits:
and selecting the sub-channel i' with the smallest power difference, namely delta P i′ The method meets the following conditions:
ΔP i′ ＝minΔP i
if there are a plurality of sub-channels with the smallest power difference, selecting the least sub-channel with the current allocated bit number as the sub-channel i' needing to be adjusted, and calculating the residual total power before and after water injection:
after selecting the sub-channel i' to be allocated, the remaining total power P left All of which are allocated to the sub-channel and the number of bits allocated thereto is calculated:
and finishing final bit power distribution.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101340224A (en) * 2007-07-04 2009-01-07 华为技术有限公司 Bit distribution method and apparatus
JP2011146757A (en) * 2010-01-12 2011-07-28 National Institute Of Information & Communication Technology Method and device for allocating power in mimo-ofdm system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7020482B2 (en) * 2002-01-23 2006-03-28 Qualcomm Incorporated Reallocation of excess power for full channel-state information (CSI) multiple-input, multiple-output (MIMO) systems
CN1604511A (en) * 2004-11-11 2005-04-06 上海交通大学 Adaptive power distribution method for multi-antenna OFDM communication system
CN102264124B (en) * 2010-05-28 2014-03-05 富士通株式会社 Bit and power distribution method and device as well as communication system
CN112332908B (en) * 2020-11-25 2021-10-22 中国科学技术大学 Rapid NC-OFDM satellite communication bit power distribution method
CN113950155A (en) * 2021-11-19 2022-01-18 西安外事学院 Resource allocation method and system based on joint power

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101340224A (en) * 2007-07-04 2009-01-07 华为技术有限公司 Bit distribution method and apparatus
JP2011146757A (en) * 2010-01-12 2011-07-28 National Institute Of Information & Communication Technology Method and device for allocating power in mimo-ofdm system

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