CN109756982B - Method and device for allocating spectrum resources and computer storage medium - Google Patents
Method and device for allocating spectrum resources and computer storage medium Download PDFInfo
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Abstract
The embodiment of the invention discloses a method and a device for allocating spectrum resources and a computer storage medium; the method can comprise the following steps: randomly distributing the sub-bandwidths in the system bandwidth to each communication link from the cell base station to the user equipment; determining initial control parameters corresponding to the sub-bandwidths according to the random distribution state of the sub-bandwidths; detecting the communication link allocated to each sub-bandwidth according to a set system index; and reallocating the communication link allocated by the target sub-bandwidth corresponding to the detection result meeting the set reallocation strategy, and revising the initial control parameters of the target sub-bandwidth until the revised control parameters corresponding to all the sub-bandwidths meet the set judgment conditions.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for allocating spectrum resources, and a computer storage medium.
Background
With the huge increase of high-speed transmission and data traffic in communication systems, future wireless communication networks will be deployed in an increasingly dense manner, and at the same time, the spectrum resources are increasingly strained, which seriously hinders the further development of mobile communication. At present, the spectral band in the microwave range is almost completely occupied, and especially during peak hours of use, data transmission is more congested.
The advent of fifth generation mobile communication technology has brought new developments in wireless communication. Millimeter wave (mmWave) is undoubtedly a key technology, because it can avoid the crowded microwave range spectrum, and has the characteristics of high gain of directivity, low delay and large-scale spectrum availability.
Although millimeter waves have the advantages in communication networks, millimeter wave communication has a limited coverage range and is sensitive to interference and blockage due to the characteristics of short wavelength and large bandwidth. Therefore, if it is desired to utilize millimeter wave communication more efficiently, efficient resource allocation strategies must be proposed to actually improve the spectral efficiency and reliability of the millimeter wave network.
Aiming at the problem of spectrum resource allocation in a millimeter wave network, part of conventional schemes provide a resource allocation scheme which presents low calculation overhead and low sub-band switching rate in a dynamic ultra-dense heterogeneous network. However, this solution does not consider interference management and cancellation in the millimeter wave network, and it can be understood that: the interference present in the network is undoubtedly the most dominant factor causing the overall network performance degradation. In addition, some conventional schemes propose a new scheme that jointly considers resource allocation and interference management to reduce the impact of various kinds of interference in the millimeter wave network. However, this scheme has a high complexity.
Disclosure of Invention
In view of the above, embodiments of the present invention are directed to a method, an apparatus, and a computer storage medium for allocating spectrum resources; the transmission performance of the millimeter wave network can be improved, and the implementation complexity of resource allocation is reduced.
The technical scheme of the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a method for allocating spectrum resources, where the method includes:
randomly distributing the sub-bandwidths in the system bandwidth to each communication link from the cell base station to the user equipment;
determining initial control parameters corresponding to the sub-bandwidths according to the random distribution state of the sub-bandwidths;
detecting the communication link allocated to each sub-bandwidth according to a set system index;
and reallocating the communication link allocated by the target sub-bandwidth corresponding to the detection result meeting the set reallocation strategy, and revising the initial control parameters of the target sub-bandwidth until the revised control parameters corresponding to all the sub-bandwidths meet the set judgment conditions.
In a second aspect, an embodiment of the present invention provides an apparatus for allocating spectrum resources, where the apparatus includes: an initial allocation section, a determination section, a detection section and a re-allocation section; wherein the content of the first and second substances,
the initial allocation part is configured to randomly allocate sub-bandwidths in the system bandwidth to each communication link from the cell base station to the user equipment;
the determining part is configured to determine initial control parameters corresponding to the sub-bandwidths according to the random allocation state of the sub-bandwidths;
the detection part is configured to detect the communication link allocated to each sub-bandwidth according to a set system index; triggering the redistribution part according to the detection result;
the reallocation part is configured to reallocate the communication link allocated by the target sub-bandwidth corresponding to the detection result meeting the set reallocation strategy, and revise the initial control parameters of the target sub-bandwidth until the revised control parameters corresponding to all sub-bandwidths meet the set judgment conditions.
In a third aspect, an embodiment of the present invention provides an apparatus for allocating spectrum resources, where the apparatus includes: a communication interface, a memory and a processor; wherein the content of the first and second substances,
the communication interface is used for receiving and sending signals in the process of receiving and sending information with other external network elements;
the memory for storing a computer program operable on the processor;
the processor is configured to, when executing the computer program, perform the method steps of allocating spectrum resources of the first aspect.
In a fourth aspect, an embodiment of the present invention provides a computer storage medium storing a program for allocating spectrum resources, where the program for allocating spectrum resources implements the method steps for allocating spectrum resources according to the first aspect when executed by at least one processor.
The embodiment of the invention provides a method, a device and a computer storage medium for allocating spectrum resources; the communication link correspondingly allocated to each sub-bandwidth in the system bandwidth is detected, and the random allocation state of each sub-bandwidth is reallocated based on the set system index until the control parameter corresponding to the allocation state of each sub-bandwidth meets the judgment condition, so that the sub-bandwidth is properly matched with the communication link, and the network throughput is greatly improved. The transmission performance of the millimeter wave network can be improved, and the implementation complexity of resource allocation is reduced.
Drawings
Fig. 1 is a block diagram of a wireless communication system according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a method for allocating spectrum resources according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an implementation process of a method for allocating spectrum resources according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating a comparison of simulation results according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating another simulation result comparison according to an embodiment of the present invention;
fig. 6 is a schematic diagram illustrating an apparatus for allocating spectrum resources according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a hardware structure of an apparatus for allocating spectrum resources according to an embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1, which illustrates an example of a wireless communication system and an access network 100 provided by an embodiment of the present invention, the wireless communication system (also referred to as a Wireless Wide Area Network (WWAN)) includes a base station 105, a UE 115, and a core network EPC 130. The base stations 105 may include macro cells (high power cellular base stations) and/or small cells (low power cellular base stations). The macro cell includes a base station. Small cells include femtocells, picocells and microcells.
The communication link 125 between a base station 105 and a UE 115 may include uplink (U L) (also referred to as reverse link) transmissions from the UE 115 to the base station 105 and/or downlink (D L) (also referred to as forward link) transmissions from the base station 105 to the UE 115. the communication link 125 may use Multiple Input Multiple Output (MIMO) antenna techniques including spatial multiplexing, beamforming, and/or transmission.A communication diversity link may be through one or more carriers the base station 105/115 may use aggregated spectrum allocations in each of the carriers 105/115 for transmission in the forward direction of up to 10 MHz, up to a total of up to 10 MHz, up to a contiguous carrier frequency (Yx) for each other, or up to a total of up to 20 MHz, up to a contiguous carrier frequency (Y + y) for each other, or up to a contiguous carrier frequency spectrum allocation of up to 20 MHz, up to a carrier frequency spectrum allocation of up to 100MHz, up to a contiguous carrier frequency (Y + y).
The g node b (gnb)105 may operate in millimeter wave (mmW) frequencies and/or near mmW frequencies to communicate with the UE 115. When gNB 105 operates in mmW or near mmW frequencies, gNB 105 may be referred to as a mmW base station. Extremely High Frequencies (EHF) are part of the RF in the electromagnetic spectrum. The EHF has a range of 30GHz to 300GHz and has a wavelength between 1 millimeter and 10 millimeters. The radio waves in this frequency band may be referred to as millimeter waves. Near mmW can be extended down to frequencies of 3GHz with a wavelength of 100 mm. The ultra-high frequency (SHF) band extends between 3GHz and 30GHz, also known as centimeter waves. Communications using the mmW/near mmW radio frequency band have extremely high path loss and short range. The mmW base station 105 may utilize beamforming with the UE 115 to compensate for extremely high path loss and short range.
In embodiments of the present invention, a base station may also be referred to as a gbb, a node B, an evolved node B (enb), an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a Basic Service Set (BSS), an Extended Service Set (ESS), or some other suitable terminology. Base stations 105 provide access points for UEs 115 to EPC 130. Examples of UEs 115 include a cellular phone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop, a Personal Digital Assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player), a camera, a gaming console, a tablet, a smart device, a wearable device, a vehicle, an electronic meter, a gas pump, a toaster, or any other device with similar functionality. Some of the UEs 115 may be referred to as Internet of Things (IoT) devices (e.g., parking meters, air pumps, toasters, vehicles, etc.). The UE 104 may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology.
Based on the communication system architecture shown in fig. 1, for the millimeter wave ultra-dense network, in the aspect of the usage method, the matching theory has been widely applied to various wireless communication fields, especially to resource allocation in the traditional ultra-high frequency network, because of the advantages of high efficiency and low complexity.
For the matching algorithm, three basic types are mainly included, i.e., one-to-one algorithm, many-to-one algorithm, and one-to-many algorithm. In particular, the one-to-one algorithm can only solve a single mapping problem, such as the selection problem of "sending-receiving" nodes. In view of the problem of spectrum resource management, since spectrum allocation involves a plurality of factors, it is preferable to use a many-to-one matching algorithm that can match the plurality of factors. Furthermore, since there is an external environment in which inter-link mutual interference exists, embodiments of the present invention prioritize the use of many-to-one matching algorithms involving the external environment to solve the complex resource allocation problem involving interference mitigation.
Based on this, referring to fig. 2, a method for allocating spectrum resources according to an embodiment of the present invention is shown, where the method may be applied to a network element device, such as a base station, for allocating resources for a user equipment UE in the architecture shown in fig. 1, and the method may include:
s201: randomly distributing the sub-bandwidths in the system bandwidth to each communication link from the cell base station to the user equipment;
s202: determining initial control parameters corresponding to the sub-bandwidths according to the random distribution state of the sub-bandwidths;
s203: detecting the communication link allocated to each sub-bandwidth according to a set system index;
s204: and reallocating the communication link allocated by the target sub-bandwidth corresponding to the detection result meeting the set reallocation strategy, and revising the initial control parameters of the target sub-bandwidth until the revised control parameters corresponding to all the sub-bandwidths meet the set judgment conditions.
For the technical scheme shown in fig. 2, the communication link correspondingly allocated to each sub-bandwidth in the system bandwidth is detected, and the random allocation state of each sub-bandwidth is reallocated based on the set system index until the control parameter corresponding to the allocation state of each sub-bandwidth meets the determination condition, so that the sub-bandwidth is utilized to be properly matched with the communication link, and the network throughput is greatly improved.
For the technical solution shown in fig. 2, in a possible implementation manner, the determining an initial control parameter corresponding to each sub-bandwidth according to a random allocation state of each sub-bandwidth includes:
generating an allocation state matrix A according to the random allocation state of each sub-bandwidth; wherein the elements in the allocation state matrix A
Communication link i for characterizing mth cell base station i to jth user equipment km→kjWhether or not the nth sub-bandwidth f is allocatedn，1≤m≤M，1≤j≤J，1≤n≤N；
Correspond to
Representing a communication link i from the mth cell base station i to the jth user equipment km→kjIs allocated with nth sub-bandwidth fn(ii) a Correspond to
Representing a communication link i from the mth cell base station i to the jth user equipment km→kjIs not allocated with nth sub-bandwidth fn；
Based on the distribution state matrix A, acquiring an initial control matrix C for representing initial control parameters corresponding to each sub-bandwidth according to the following formula:
C＝1-A
where 1 represents an all-1 matrix of the same size as a.
Based on the initial control matrix C, preferably, the detecting, according to a set system index, the communication link allocated to each sub-bandwidth includes:
in the initial control matrix C, the following detection is performed for an element corresponding to each sub-bandwidth:
corresponding to the nth sub-bandwidth fnCorresponding element exists 1 element, the nth sub-bandwidth f is detectednThe assigned first communication link i → k;
when the nth sub-bandwidth fnThe system throughput when allocated to the second communication link i → k' is greater than the nth sub-bandwidth fnIf the system throughput distributed to the first communication link i → k meets the set redistribution strategy, determining that the detection result meets the set redistribution strategy;
when the nth sub-bandwidth fnI → k and p sub-bandwidth f allocated to the first communication linkpThe system throughput when allocated to the second communication link i → k' is less than the nth sub-bandwidth fnI → k' to the second communication link and the p sub-bandwidth fpAnd determining that the detection result meets the set reallocation strategy according to the system throughput when the first communication link is allocated to the i → k.
For the above preferred example, in the implementation process, all sub-bandwidths are detected one by one, and when finding out that in the initial control matrix C, a certain sub-bandwidth, for example, the nth sub-bandwidth fnIf 1 element exists, then f is the sub-bandwidthnAll the allocated communication links are detected, if the detection result meets any one of the two conditions, the detection result is determined to meet the set reallocation strategy, and the sub-bandwidth f is subjected to the reallocation strategy at the momentnAnd carrying out redistribution.
Based on this, preferably, the step of reallocating the communication link allocated by the target sub-bandwidth corresponding to the detection result and revising the initial control parameter of the target sub-bandwidth, in which the corresponding detection result satisfies the set reallocation policy, includes:
corresponding to the nth sub-bandwidth fnThe system throughput when allocated to the second communication link i → k' is greater than the nth sub-bandwidth fnThe condition of the system throughput allocated to the first communication link i → k, the nth sub-bandwidth fnI → k' to the second communication link and the n-th sub-bandwidth fnAn assignment relation with the first communication link i → k, and assigning elements in the initial control matrix
And
all are set to zero, and the nth sub-bandwidth f in the initial control matrixnThe elements corresponding to the other communication links except the first communication link i → k and the second communication link i → k' are set to be 1;
corresponding to the nth sub-bandwidth fnI → k and p sub-bandwidth f allocated to the first communication linkpThe system throughput when allocated to the second communication link i → k' is less than the nth sub-bandwidth fnI → k' to the second communication link and the p sub-bandwidth fpThe condition of the system throughput when being allocated to the first communication link i → k is released from the nth sub-bandwidth fnAn allocation relationship with the first communication link i → k and the nth sub-bandwidth fnAssigned to the second communication link i → k' and deallocated the p-th sub-bandwidth fpThe assignment relation with the second communication link i → k' and the p-th sub-bandwidth fpAssigning to the first communication link i → k, and assigning elements in the initial control matrix
All are set to zero, and the nth sub-bandwidth f in the initial control matrixnAnd the p sub-bandwidth fpThe elements corresponding to the other communication links except the first communication link i → k and the second communication link i → k' are set to 1.
For the above preferred example, in the implementation, according to the above two cases:
setting the bandwidth f of the statornAssigned to the first communication link i → k, if the sub-bandwidth f is assignednThe allocation to the second communication link i → k' enables a higher system throughput to be achieved than otherwise, this is done and the sub-bandwidth f is removednAssignment relation with the first communication link i → k, i.e. in the assignment state matrix
And is
At the same time, the corresponding position of the matrix C is controlled
And
set to 0, indicating that the links i → k and i → k' have reached the resource-optimized allocation effect, and then do not consider the exchange action. Since the work is in the same sub-bandwidth fnSince the other communication links except the first communication link i → k and the second communication link i → k' are interfered by the two links, the sub-bandwidth f in the control matrix CnSetting elements corresponding to other communication links to be 1;
setting the nth sub-bandwidth fnI → k and p sub-bandwidth f allocated to the first communication linkpI → k' allocated to the second communication link, and if the communication links allocated to the first and second communication links are exchanged to achieve higher system throughput, the nth sub-bandwidth f is releasednAn allocation relationship with the first communication link i → k and the nth sub-bandwidth fnAssigned to the second communication link i → k' and deallocated the p-th sub-bandwidth fpAnd the secondCommunication link i → k' and allocating the p-th sub-bandwidth fpI → k, i.e. the order, into the first communication link
At the same time, the elements in the control matrix C are combined
And 0 is set, which means that the communication links i → k and i → k' have reached the effect of resource optimization allocation, and then the exchange action is not considered. Due to operation in the same sub-bandwidth fnAnd sub-bandwidth fpThe communication links except the first communication link i → k and the second communication link i → k' under the control matrix C are interfered by the two links, so that the sub-bandwidth f in the control matrix CnAnd sub-bandwidth fpSetting elements corresponding to other communication links to be 1;
for the above preferred example, it should be noted that not only the sub-bandwidth and the communication link are reallocated according to the system throughput, but also the mutual interference between the communication links is considered during the reallocation, so that the problem of transmission interference is solved during the sub-bandwidth reallocation,
for the above preferred example, the step of determining that the revised control parameters corresponding to all sub-bandwidths satisfy the set determination condition includes:
in the modified control matrix, detecting the element corresponding to each sub-bandwidth:
if 1 element exists, detecting a communication link distributed by a sub-bandwidth corresponding to the 1 element;
and correspondingly, if the detection result meets the set reallocation strategy, reallocating the communication link allocated by the sub-bandwidth corresponding to the element 1, and modifying the control parameters of the sub-bandwidth corresponding to the element 1 aiming at the modified control matrix until all elements in the whole control matrix are zero.
Specifically, in the modified control matrix, detecting an element corresponding to each sub-bandwidth, and if 1 element still exists in the control matrix C corresponding to a certain sub-bandwidth f, continuing to execute the reallocation process; if all elements of the whole control matrix C are 0, the communication link allocation of the whole system bandwidth is already optimal, and the reallocation process is stopped.
For the above technical solutions, the embodiments of the present invention are described in detail by using implementation examples in specific scenarios.
The method comprises the steps of setting a scene as a millimeter wave ultra-dense multi-cell network, wherein the network comprises a macro base station and a plurality of densely distributed cells, and each cell corresponds to a micro base station and a plurality of users. When information is transmitted, the macro base station transmits the information to the micro base stations of all the cells, and then the micro base stations transmit the information to all the users.
In the above scenario, the micro base stations in the set cell use i respectively1,i2,...,iMMeans that the users in each cell use k1,k2,...,kJThat means, for i cell, the downlink transmission link is i → k1,i→k2..., the sub-bandwidth to be allocated is f1,f2,...,fN. The matching between sub-bandwidth and transmission link is represented by a matrix A, e.g. the elements in matrix A
Which characterizes the communication link i from the mth cell base station i to the jth user equipment km→kjWhether or not the nth sub-bandwidth f is allocatednIf, if
Representing a communication link i from the mth cell base station i to the jth user equipment km→kjIs allocated with nth sub-bandwidth fn(ii) a Correspond to
Denotes the m-th cell base station i to the m-thCommunication links i for j user equipments km→kjIs not allocated with nth sub-bandwidth fn. While a control matrix C is introduced to indicate whether a switching action can take place for the allocation between the sub-bandwidths and the transmission link, e.g. the elements of matrix C
Which represents the communication link i from the mth cell base station i to the jth user equipment km→kjAnd nth sub-bandwidth fnWhether the allocation status can be changed, e.g. if
Indicates the communication link im→kjAnd nth sub-bandwidth fnThe distribution state between the two units cannot be changed if
Indicates the communication link im→kjAnd nth sub-bandwidth fnThe allocation status between may change.
Based on the above scenario and parameter settings, the specific implementation process of the technical solution shown in fig. 2 in the above settings is shown in fig. 3:
s1: sub-bandwidth f to be allocated1,f2,...,fNRandomly distributing the data to each transmission link of each cell to obtain a distribution state matrix A;
s2: initializing a control matrix C to C-1-A;
s3: in the control matrix, detecting elements corresponding to all sub-bandwidths: when there is a 1 element in the control matrix, go to S4: detecting the cell corresponding to the element 1 according to the system index, and executing S5 or S6; when all the control matrices are 0 elements, the process goes to S8.
It should be noted that, when the detection result meets one of the following two reallocation policies, the sub-bandwidth f corresponding to the 1 element is reallocated, and the specific reallocation policy is as follows:
s5: if sub-bandwidth f is allocated toThe second communication link i → k 'can realize higher system throughput than the sub-bandwidth f is allocated to the original first communication link i → k, then the sub-bandwidth f is allocated to the second communication link i → k', and the matching relationship between the sub-bandwidth f and the original first communication link i → k is released, that is, the A in the allocation state matrix is orderedi→k,fIs equal to 0 and Ai→k′,f1 is ═ 1; while controlling the corresponding position C in the matrix Ci→k,fAnd Ci→k′,fAnd setting zero to indicate that the links i → k and i → k' have reached the effect of resource optimization allocation and then do not consider the exchange action. Because the communication links in other cells working under the same sub-bandwidth f are interfered by two links, i → k and i → k', the elements corresponding to the communication links in other cells in the control matrix C are set to 1, which indicates that the communication links corresponding to the positions are also considered to possibly perform matching action;
s6: the sub-bandwidth f and the sub-bandwidth f ' are respectively allocated to the first communication link i → k and the second communication link i → k ', and if the communication links correspondingly allocated to the sub-bandwidth f and the sub-bandwidth f ' can realize higher system throughput, the allocation relation between the sub-bandwidth f and the original first communication link i → k is removed and the sub-bandwidth f is allocated to the second communication link i → k ', the allocation relation between the sub-bandwidth f ' and the original second communication link i → k ' is removed and the sub-bandwidth f ' is allocated to the first communication link i → k, i.e. a in the signaling allocation state matrixi→k,f＝0、Ai→k′,f＝1、Ai→k′,f′＝0，Ai→k,f′1 is ═ 1; while controlling the corresponding position C in the matrix Ci→k,f、Ci→k′,f、Ci→k,f′、Ci→k′,f′And setting zero to indicate that the links i → k and i → k' have reached the effect of resource optimization allocation and then do not consider the exchange action. And communication links in other cells operating under the same sub-bandwidth f and sub-bandwidth f 'are interfered by two links, i → k and i → k', so that the element 1 corresponding to the communication links in other cells in the control matrix C is set, which indicates that the communication links corresponding to the positions are also considered to possibly perform matching action.
S7: continuing to detect elements corresponding to other sub-bandwidths in the control matrix, and returning to S4 if 1 element still exists corresponding to other sub-bandwidths; if all elements in the control matrix are found to be zero, the means S8: the flow ends.
The simulation is performed for the above scenario and the specific implementation process shown in fig. 3, and the simulation conditions are as follows: the millimeter wave ultra-dense cell network comprises 1 macro base station and 7 cells, wherein a micro base station is arranged in the center of each cell, and each micro base station serves all users in the cell where the micro base station is located. The total number of sub-bandwidths is 6, the line-of-sight transmission loss is 3, the non-line-of-sight transmission loss is 2, the time slot length is 1ms, the maximum transmission power of the macro base station is 30dBm, and the noise power is-174 dBm/Hz. The following simulations were performed under the above simulation conditions.
Simulation content one
Under the condition of different distances among cells, the method for allocating spectrum resources provided by the embodiment of the invention is adopted for the millimeter wave ultra-dense cell network to perform simulation comparison with other conventional spectrum resource allocation methods respectively, and the comparison result is shown in fig. 4. In fig. 4, the ordinate is "system and rate", indicating the total rate of the entire network; the abscissa is the "inter-cell distance coefficient"; the "+" type broken line represents a simulation result of the method for allocating spectrum resources provided by the embodiment of the invention, the triangular broken line represents a simulation result of a greedy allocation algorithm, and the lattice type broken line represents a simulation result of a random allocation algorithm.
As can be seen from the simulation result of fig. 4, under the condition that the distances between the cells are different, the system and the rate of the millimeter wave ultra-dense cell network using the method for allocating spectrum resources provided by the embodiment of the present invention are significantly higher than those using other conventional spectrum resource allocation methods; therefore, the method for allocating the spectrum resources provided by the embodiment of the invention is applicable to different distances between cells, and the effect is obviously better than that of other conventional spectrum resource allocation methods.
Simulation content two
Under the condition of different numbers of users in the cells, the method for allocating spectrum resources provided by the embodiment of the invention is adopted for the millimeter wave ultra-dense cell network to perform simulation comparison with other conventional spectrum resource allocation methods respectively, and the comparison result is shown in fig. 5. In fig. 5, the ordinate is "system and rate", indicating the total rate of the entire network; the abscissa is "the number of users in a cell"; the dotted line indicates the simulation result of the method for allocating spectrum resources according to the embodiment of the present invention, the triangular dotted line indicates the simulation result of the greedy allocation algorithm, and the dotted line indicates the simulation result of the random allocation algorithm.
As can be seen from the simulation result of fig. 5, under the condition that the number of users in a cell is different, the system and the rate of the millimeter wave ultra-dense cell network using the method for allocating spectrum resources provided by the embodiment of the present invention are significantly higher than those using other conventional spectrum resource allocation methods; therefore, the method for allocating the spectrum resources provided by the embodiment of the invention is applicable to different numbers of users in the cell, and the effect is obviously better than that of the conventional spectrum resource allocation method.
Based on the same inventive concept of the foregoing embodiment, referring to fig. 6, an apparatus 60 for allocating spectrum resources according to an embodiment of the present invention is shown, where the apparatus 60 includes: an initial allocation section 601, a determination section 602, a detection section 603, and a reallocation section 604; wherein the content of the first and second substances,
the initial allocation portion 601 is configured to randomly allocate a sub-bandwidth in a system bandwidth to each communication link from a cell base station to a user equipment;
the determining part 602 is configured to determine an initial control parameter corresponding to each sub-bandwidth according to a random allocation state of each sub-bandwidth;
the detecting part 603 is configured to detect the communication link allocated to each sub-bandwidth according to a set system index; and triggers the redistribution part 604 according to the detection result;
the reallocation portion 604 is configured to reallocate the communication link allocated by the target sub-bandwidth corresponding to the detection result, and revise the initial control parameter of the target sub-bandwidth until the revised control parameter corresponding to all sub-bandwidths meets the set determination condition, in response to the detection result meeting the set reallocation policy.
In the above scheme, the determining part 602 is configured to:
generating an allocation state matrix A according to the random allocation state of each sub-bandwidth; wherein the elements in the allocation state matrix A
Communication link i for characterizing mth cell base station i to jth user equipment km→kjWhether or not the nth sub-bandwidth f is allocatedn，1≤m≤M，1≤j≤J，1≤n≤N；
Correspond to
Representing a communication link i from the mth cell base station i to the jth user equipment km→kjIs allocated with nth sub-bandwidth fn(ii) a Correspond to
Representing a communication link i from the mth cell base station i to the jth user equipment km→kjIs not allocated with nth sub-bandwidth fn；
Based on the distribution state matrix A, acquiring an initial control matrix C for representing initial control parameters corresponding to each sub-bandwidth according to the following formula:
C＝1-A
where 1 represents an all-1 matrix of the same size as a.
In the above scheme, the detecting section 603 is configured to:
in the initial control matrix C, the following detection is performed for an element corresponding to each sub-bandwidth:
corresponding to the nth sub-bandwidth fnCorresponding element exists 1 element, the nth sub-bandwidth f is detectednThe assigned first communication link i → k;
when the nth sub-bandwidth fnThe system throughput when allocated to the second communication link i → k' is greater than the nth sub-bandwidth fnIf the system throughput distributed to the first communication link i → k meets the set redistribution strategy, determining that the detection result meets the set redistribution strategy;
when the nth sub-bandwidth fnI → k and p sub-bandwidth f allocated to the first communication linkpThe system throughput when allocated to the second communication link i → k' is less than the nth sub-bandwidth fnI → k' to the second communication link and the p sub-bandwidth fpIf the system throughput is distributed to the first communication link i → k, determining that the detection result meets the set redistribution strategy;
accordingly, the redistribution portion 604 is configured to:
corresponding to the nth sub-bandwidth fnThe system throughput when allocated to the second communication link i → k' is greater than the nth sub-bandwidth fnThe condition of the system throughput allocated to the first communication link i → k, the nth sub-bandwidth fnI → k' to the second communication link and the n-th sub-bandwidth fnAn assignment relation with the first communication link i → k, and assigning elements in the initial control matrix
And
all are set to zero, and the nth sub-bandwidth f in the initial control matrixnThe elements corresponding to the other communication links except the first communication link i → k and the second communication link i → k' are set to be 1;
corresponding to the nth sub-bandwidth fnI → k and p sub-bandwidth f allocated to the first communication linkpThe system throughput when allocated to the second communication link i → k' is less than the nth sub-bandwidth fnI → k' to the second communication link and the p sub-bandwidth fpThe condition of the system throughput when being allocated to the first communication link i → k is released from the nth sub-bandwidth fnI → k with the first communication linkAllocating the relation and dividing the nth sub-bandwidth fnAssigned to the second communication link i → k' and deallocated the p-th sub-bandwidth fpThe assignment relation with the second communication link i → k' and the p-th sub-bandwidth fpAssigning to the first communication link i → k, and assigning elements in the initial control matrix
All are set to zero, and the nth sub-bandwidth f in the initial control matrixnAnd the p sub-bandwidth fpThe elements corresponding to the other communication links except the first communication link i → k and the second communication link i → k' are set to 1.
In the above scheme, the redistribution portion 604 is configured to:
in the modified control matrix, detecting the element corresponding to each sub-bandwidth:
if 1 element exists, detecting a communication link distributed by a sub-bandwidth corresponding to the 1 element;
and correspondingly, if the detection result meets the set reallocation strategy, reallocating the communication link allocated by the sub-bandwidth corresponding to the element 1, and modifying the control parameters of the sub-bandwidth corresponding to the element 1 aiming at the modified control matrix until all elements in the whole control matrix are zero.
It is understood that in this embodiment, "part" may be part of a circuit, part of a processor, part of a program or software, etc., and may also be a unit, and may also be a module or a non-modular.
In addition, each component in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit. The integrated unit can be realized in a form of hardware or a form of a software functional module.
Based on the understanding that the technical solution of the present embodiment essentially or a part contributing to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, and include several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the method of the present embodiment. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Therefore, the present embodiment provides a computer storage medium, which stores a program for allocating spectrum resources, and when the program for allocating spectrum resources is executed by at least one processor, the steps of the method for allocating spectrum resources in the above technical solution are implemented.
Based on the apparatus 60 for allocating spectrum resources and the computer storage medium, referring to fig. 7, a specific hardware structure of the apparatus 60 for allocating spectrum resources according to an embodiment of the present invention is shown, which includes: a communication interface 701, a memory 702, and a processor 703; the various components are coupled together by a bus system 704. It is understood that the bus system 704 is used to enable communications among the components. The bus system 704 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled in fig. 7 as the bus system 704. Wherein the content of the first and second substances,
the communication interface 701 is configured to receive and transmit signals in a process of receiving and transmitting information with other external network elements;
the memory 702 is used for storing a computer program capable of running on the processor 703;
the processor 703 is configured to, when running the computer program, perform the following steps:
randomly distributing the sub-bandwidths in the system bandwidth to each communication link from the cell base station to the user equipment;
determining initial control parameters corresponding to the sub-bandwidths according to the random distribution state of the sub-bandwidths;
detecting the communication link allocated to each sub-bandwidth according to a set system index;
and reallocating the communication link allocated by the target sub-bandwidth corresponding to the detection result meeting the set reallocation strategy, and revising the initial control parameters of the target sub-bandwidth until the revised control parameters corresponding to all the sub-bandwidths meet the set judgment conditions.
It is understood that the Memory 702 in embodiments of the present invention may be either volatile Memory or non-volatile Memory, or may include both volatile and non-volatile Memory, wherein non-volatile Memory may be Read-Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), or flash Memory volatile Memory may be Random Access Memory (RAM), which serves as external cache Memory, by way of example and not limitation, many forms of RAM are available, such as Static Random Access Memory (Static RAM, SRAM), Dynamic Random Access Memory (Dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (Synchronous DRAM, SDRAM), Double Data rate Synchronous Dynamic Random Access Memory (Double Data, ddrsted DRAM), Enhanced Synchronous DRAM (Enhanced DRAM), or SDRAM L, and any other types of RAM suitable for accessing a system including, but not limited to SDRAM, and SDRAM, and other suitable for use of the system Access methods described herein.
The processor 703 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the method may be implemented by hardware integrated logic circuits in the processor 703 or by instructions in the form of software. The Processor 703 may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 702, and the processor 703 reads the information in the memory 702 and performs the steps of the above method in combination with the hardware thereof.
For a hardware implementation, the Processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable logic devices (P L D), Field-Programmable Gate arrays (FPGAs), general purpose processors, controllers, microcontrollers, microprocessors, other electronic units configured to perform the functions described herein, or a combination thereof.
For a software implementation, the techniques described herein may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.
Specifically, when the processor 703 is further configured to run the computer program, the method step for allocating spectrum resources in the foregoing technical solution is executed, which is not described herein again.
It should be noted that: the technical schemes described in the embodiments of the present invention can be combined arbitrarily without conflict.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (7)
1. A method for allocating spectrum resources, the method comprising:
randomly distributing the sub-bandwidths in the system bandwidth to each communication link from the cell base station to the user equipment;
determining initial control parameters corresponding to the sub-bandwidths according to the random distribution state of the sub-bandwidths;
detecting the communication link allocated to each sub-bandwidth according to a set system index;
corresponding to the detection result meeting the set redistribution strategy, redistributing the communication link distributed by the target sub-bandwidth corresponding to the detection result, revising the initial control parameters of the target sub-bandwidth until the revised control parameters corresponding to all sub-bandwidths meet the set judgment condition,
wherein, the determining the initial control parameter corresponding to each sub-bandwidth according to the random allocation state of each sub-bandwidth includes:
generating an allocation state matrix A according to the random allocation state of each sub-bandwidth; wherein the elements in the allocation state matrix A
Communication link i for characterizing mth cell base station i to jth user equipment km→kjWhether or not the nth sub-bandwidth f is allocatedn，1≤m≤M，1≤j≤J，1≤n≤N；
Correspond to
Representing a communication link i from the mth cell base station i to the jth user equipment km→kjIs allocated with nth sub-bandwidth fn(ii) a Correspond to
Representing a communication link i from the mth cell base station i to the jth user equipment km→kjIs not allocated with nth sub-bandwidth fn；
Based on the distribution state matrix A, acquiring an initial control matrix C for representing initial control parameters corresponding to each sub-bandwidth according to the following formula:
C＝1-A
wherein 1 represents an all-1 matrix of the same size as A,
and wherein the detecting the communication link allocated to each sub-bandwidth according to the set system index comprises:
in the initial control matrix C, the following detection is performed for an element corresponding to each sub-bandwidth:
corresponding to the nth sub-bandwidth fnCorresponding element exists 1 element, the nth sub-bandwidth f is detectednThe assigned first communication link i → k;
when the nth sub-bandwidth fnThe system throughput when allocated to the second communication link i → k' is greater than the nth sub-bandwidth fnIf the system throughput distributed to the first communication link i → k meets the set redistribution strategy, determining that the detection result meets the set redistribution strategy;
when the nth sub-bandwidth fnIs allocated to the first communication linki → k and p sub-bandwidth fpThe system throughput when allocated to the second communication link i → k' is less than the nth sub-bandwidth fnI → k' to the second communication link and the p sub-bandwidth fpAnd determining that the detection result meets the set reallocation strategy according to the system throughput when the first communication link is allocated to the i → k.
2. The method of claim 1, wherein the step of reallocating the communication link allocated by the target sub-bandwidth corresponding to the detection result and revising the initial control parameter of the target sub-bandwidth in response to the detection result satisfying the set reallocation policy comprises:
corresponding to the nth sub-bandwidth fnThe system throughput when allocated to the second communication link i → k' is greater than the nth sub-bandwidth fnThe condition of the system throughput allocated to the first communication link i → k, the nth sub-bandwidth fnI → k' to the second communication link and the n-th sub-bandwidth fnAn assignment relation with the first communication link i → k, and assigning elements in the initial control matrix
And
all are set to zero, and the nth sub-bandwidth f in the initial control matrixnThe elements corresponding to the other communication links except the first communication link i → k and the second communication link i → k' are set to be 1;
corresponding to the nth sub-bandwidth fnI → k and p sub-bandwidth f allocated to the first communication linkpThe system throughput when allocated to the second communication link i → k' is less than the nth sub-bandwidth fnI → k' to the second communication link and the p sub-bandwidth fpShape of system throughput when assigned to the first communication link i → kIn case of releasing the nth sub-bandwidth fnAn allocation relationship with the first communication link i → k and the nth sub-bandwidth fnAssigned to the second communication link i → k' and deallocated the p-th sub-bandwidth fpThe assignment relation with the second communication link i → k' and the p-th sub-bandwidth fpAssigning to the first communication link i → k, and assigning elements in the initial control matrix
All are set to zero, and the nth sub-bandwidth f in the initial control matrixnAnd the p sub-bandwidth fpThe elements corresponding to the other communication links except the first communication link i → k and the second communication link i → k' are set to 1.
3. The method according to claim 2, wherein the step of determining that the revised control parameters corresponding to all sub-bandwidths satisfy the set determination condition comprises:
in the modified control matrix, detecting the element corresponding to each sub-bandwidth:
if 1 element exists, detecting a communication link distributed by a sub-bandwidth corresponding to the 1 element;
and correspondingly, if the detection result meets the set reallocation strategy, reallocating the communication link allocated by the sub-bandwidth corresponding to the element 1, and modifying the control parameters of the sub-bandwidth corresponding to the element 1 aiming at the modified control matrix until all elements in the whole control matrix are zero.
4. An apparatus for allocating spectrum resources, the apparatus comprising: an initial allocation section, a determination section, a detection section and a re-allocation section; wherein the content of the first and second substances,
the initial allocation part is configured to randomly allocate sub-bandwidths in the system bandwidth to each communication link from the cell base station to the user equipment;
the determining part is configured to determine initial control parameters corresponding to the sub-bandwidths according to the random allocation state of the sub-bandwidths;
the detection part is configured to detect the communication link allocated to each sub-bandwidth according to a set system index; triggering the redistribution part according to the detection result;
the reallocation part is configured to reallocate the communication link allocated by the target sub-bandwidth corresponding to the detection result meeting the set reallocation strategy, revise the initial control parameters of the target sub-bandwidth until the revised control parameters corresponding to all sub-bandwidths meet the set judgment conditions,
wherein the determination section is configured to:
generating an allocation state matrix A according to the random allocation state of each sub-bandwidth; wherein the elements in the allocation state matrix A
Communication link i for characterizing mth cell base station i to jth user equipment km→kjWhether or not the nth sub-bandwidth f is allocatedn，1≤m≤M，1≤j≤J，1≤n≤N；
Correspond to
Representing a communication link i from the mth cell base station i to the jth user equipment km→kjIs allocated with nth sub-bandwidth fn(ii) a Correspond to
Representing a communication link i from the mth cell base station i to the jth user equipment km→kjIs not allocated with nth sub-bandwidth fn；
Based on the distribution state matrix A, acquiring an initial control matrix C for representing initial control parameters corresponding to each sub-bandwidth according to the following formula:
C＝1-A
wherein 1 represents an all-1 matrix of the same size as A,
and wherein the detection section is configured to:
in the initial control matrix C, the following detection is performed for an element corresponding to each sub-bandwidth:
corresponding to the nth sub-bandwidth fnCorresponding element exists 1 element, the nth sub-bandwidth f is detectednThe assigned first communication link i → k;
when the nth sub-bandwidth fnThe system throughput when allocated to the second communication link i → k' is greater than the nth sub-bandwidth fnIf the system throughput distributed to the first communication link i → k meets the set redistribution strategy, determining that the detection result meets the set redistribution strategy;
when the nth sub-bandwidth fnI → k and p sub-bandwidth f allocated to the first communication linkpThe system throughput when allocated to the second communication link i → k' is less than the nth sub-bandwidth fnI → k' to the second communication link and the p sub-bandwidth fpAnd determining that the detection result meets the set reallocation strategy according to the system throughput when the first communication link is allocated to the i → k.
5. The apparatus of claim 4, wherein the redistribution portion is configured to:
corresponding to the nth sub-bandwidth fnThe system throughput when allocated to the second communication link i → k' is greater than the nth sub-bandwidth fnThe condition of the system throughput allocated to the first communication link i → k, the nth sub-bandwidth fnI → k' to the second communication link and the n-th sub-bandwidth fnAn assignment relation with the first communication link i → k, and assigning elements in the initial control matrix
And
all are set to zero, and the nth sub-bandwidth f in the initial control matrixnThe elements corresponding to the other communication links except the first communication link i → k and the second communication link i → k' are set to be 1;
corresponding to the nth sub-bandwidth fnI → k and p sub-bandwidth f allocated to the first communication linkpThe system throughput when allocated to the second communication link i → k' is less than the nth sub-bandwidth fnI → k' to the second communication link and the p sub-bandwidth fpThe condition of the system throughput when being allocated to the first communication link i → k is released from the nth sub-bandwidth fnAn allocation relationship with the first communication link i → k and the nth sub-bandwidth fnAssigned to the second communication link i → k' and deallocated the p-th sub-bandwidth fpThe assignment relation with the second communication link i → k' and the p-th sub-bandwidth fpAssigning to the first communication link i → k, and assigning elements in the initial control matrix
All are set to zero, and the nth sub-bandwidth f in the initial control matrixnAnd the p sub-bandwidth fpThe elements corresponding to the other communication links except the first communication link i → k and the second communication link i → k' are set to 1.
6. An apparatus for allocating spectrum resources, the apparatus comprising: a communication interface, a memory and a processor; wherein the content of the first and second substances,
the communication interface is used for receiving and sending signals in the process of receiving and sending information with other external network elements;
the memory for storing a computer program operable on the processor;
the processor, when executing the computer program, is configured to perform the method steps of allocating spectrum resources of any of claims 1 to 3.
7. A computer storage medium, characterized in that the computer storage medium stores a program for allocating spectrum resources, which when executed by at least one processor implements the method steps for allocating spectrum resources of any one of claims 1 to 3.
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