KR20160051166A - Communication Method And Apparatus By Frequency Hopping - Google Patents
Communication Method And Apparatus By Frequency Hopping Download PDFInfo
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- KR20160051166A KR20160051166A KR1020140150647A KR20140150647A KR20160051166A KR 20160051166 A KR20160051166 A KR 20160051166A KR 1020140150647 A KR1020140150647 A KR 1020140150647A KR 20140150647 A KR20140150647 A KR 20140150647A KR 20160051166 A KR20160051166 A KR 20160051166A
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- H—ELECTRICITY
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- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
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Abstract
Description
BACKGROUND OF THE
A frequency hopping system uses a frequency hopping spread spectrum (FHSS) technique in which a frequency is not fixed but transmitted over time, and uses a wider frequency band than a system using a single frequency. Therefore, in order to efficiently operate a wide frequency band, the frequency hopping system maintains a scheme in which a plurality of networks coexist in the same frequency band with different frequency hopping patterns. That is, each network is classified according to the frequency hopping pattern and coexist in the same frequency band at the same time.
To facilitate understanding with reference to FIG. 1, FIG. 1 shows an example in which each network utilizes a channel in a single channel system and a frequency hopping system. In FIG. 1, an upper case alphabet means a network, and a numeral means a frequency channel. FIG. 1 (a) shows a case of a single channel system, and it can be seen that each network occupies one frequency channel, and FIG. 1 (b) shows a case of a general frequency hopping system. (A to L) share the entire frequency channels (1 to 12).
In addition, the frequency hopping system can be classified into a synchronous frequency hopping system and an asynchronous frequency hopping system, which will be described with reference to FIG. 2 is a diagram showing an example of signal transmission in a synchronous frequency hopping system and an asynchronous frequency hopping system.
2 (a) shows an example of signal transmission in a synchronous frequency hopping system. In a synchronous frequency hopping system, all signals received at a certain receiving end are synchronized with each other. FIG. 2 The collision of the frequency bands between the networks, that is, the Multiple Access Interference (MAI) does not occur when the frequency hopping of each network is performed in synchronization with the time slot. That is, in the synchronous frequency hopping system of FIG. 2 (a), when all the signals are synchronized, when the A network and the B network transmit signals with frequency different from each other, it can be confirmed that the MAI does not occur. Thus, in the synchronous frequency hopping system, the number of coexistence networks can be maintained by the number of maximum frequencies. That is, in a synchronous frequency hopping system composed of 12 frequency channels, 12 networks coexist.
Meanwhile, FIG. 2B shows an example of signal transmission in the asynchronous frequency hopping system, and the asynchronous frequency hopping system is a type in which the received signals are not synchronized with any receiving end. In the asynchronous frequency hopping system, the MAI is inevitably generated due to propagation delay time regardless of the frequency hopping pattern, and the asynchronous frequency hopping system is mainly used for propagation compared to the frequency hopping period This is true when the delay time is long. That is, in the asynchronous frequency hopping system of FIG. 2 (b), the received signals are not synchronized and MAI is generated in some signals although the A network and the B network transmit signals with frequency separation from each other. Unlike synchronous frequency hopping systems, these asynchronous frequency hopping systems have the disadvantage that the coding scheme is additionally used to overcome the MAI and the number of coexisting networks is smaller than that of synchronous frequency hopping systems.
In Korean Patent No. 10-1290902 entitled " An interference signal avoiding apparatus and method for a frequency hopping spreading system ", in an FHSS system, an apparatus for avoiding a coherent or heterogeneous interference signal existing in the same band and transmitting / A detector for detecting presence or absence of an interference signal for frequency hopping candidate channels to be used for a next frequency hopping using an interference signal detector; A transmitter for transmitting a signal through a channel determined to be free of an interference signal from the signal detector; a receiver for receiving a transmitted signal from among the frequency hopping candidate channels to search for a channel to which the signal is transmitted; Transmission power control of the FHSS system using the signal-to-noise ratio Wherein the determining unit determines a frequency hopping channel set of the FHSS system includes an estimator for estimating the number of intra-band interference signals, a frequency hopping unit for determining a frequency hopping channel set based on the estimated number of interference signals, And a channel set determination unit.
The prior art described above has the advantage of solving the performance degradation of the wireless system due to the coherent / heterogeneous interference signal in the unlicensed band, while avoiding the same / different kind of interference signal in the FHSS system. It takes a long time for signal processing because it detects the interference signal and avoids the coherent interference signal by changing the hopping frequency channel of the FHSS system according to the characteristics of the detected interference signal. There is still a disadvantage that the MAI is generated due to the propagation delay time and the like, and the number of coexisting networks is small.
BACKGROUND OF THE
The present invention aims to increase the number of coexistent networks in the entire band as the frequency of occurrence of MAI is reduced in a frequency hopping system, particularly an asynchronous frequency hopping system.
The present invention seeks to increase the overall frequency spectral efficiency in a frequency hopping system, particularly an asynchronous frequency hopping system.
The present invention aims to maximize the number of coexistence networks while satisfying the requirements of each network (Quality of Service, QoS).
When the anti-jamming capability among the requirements of each network is included, the present invention increases partial band jamming or tone jamming by increasing the number of channels that each network can hop on, And to secure the anti-jamming ability for the user.
The present invention aims at securing a transmission rate by lowering the coding overhead by reducing the frequency of occurrence of MAI in signals transmitted from each network when a transmission rate among the requirements of each network is included.
An object of the present invention is to provide a frequency hopping communication technique capable of improving an anti-jamming capability and a transmission rate.
According to an aspect of the present invention, there is provided a communication channel allocation method including: generating a plurality of channel groups including a part of all available channels; And allocating, for each of the plurality of user networks, one of the plurality of channel groups to a first channel group capable of transmitting a signal by applying a frequency hopping technique to each of the plurality of user networks, Wherein a part of the plurality of channel groups forms an orthogonal channel group in which there is no channel overlapping with each other, and the remaining part of the plurality of channel groups forms at least one or more channels overlapping with the channel group belonging to the orthogonal channel group Channels to form a non-orthogonal channel group.
The generating step may include determining a number of channel groups belonging to the orthogonal channel group and a channel group belonging to the non-orthogonal channel group to satisfy a network requirement for each of the plurality of user networks, The number of channels in the channel group of each of the channel group and the non-orthogonal channel group can be determined.
Also, the allocating may reflect one of a channel group belonging to the orthogonal channel group or a channel group belonging to the non-orthogonal channel group to the first channel group, reflecting the network requirement for each of the plurality of user networks. Determining a number of channels to which the frequency hopping technique is to be applied by reflecting a network requirement for each of the plurality of user networks and determining a number of channels belonging to the orthogonal channel group based on the determined number of channels One of the channel group and the channel group belonging to the non-orthogonal channel group may be determined as the first channel group and allocated.
In addition, in the generating or allocating step, in order to satisfy the network requirement for each of the plurality of user networks including at least one of anti-jamming characteristics and a rate, Wherein the changing step includes changing at least one of a change in a network requirement for each of the plurality of user networks or a change in channel characteristics due to environmental influences, , The number of channels in the channel group of each of the orthogonal channel group and the non-orthogonal channel group can be changed dynamically.
Meanwhile, a communication method using frequency hopping according to an embodiment of the present invention is a communication method executed in a communication device belonging to a first user network of a plurality of user networks, Identifying a channel group assigned to a first user network among a plurality of channel groups including the first user network; And transmitting a signal by applying a frequency hopping technique in the assigned channel group in the communication apparatus, wherein a part of the plurality of channel groups forms an orthogonal channel group in which there is no channel overlapping each other And a remaining part of the plurality of channel groups may form a non-orthogonal channel group having at least one channel overlapping with the channel group belonging to the orthogonal channel group.
In addition, the identifying step may comprise: identifying a channel group assigned to the first user network as a channel group belonging to the orthogonal channel group determined to satisfy the network requirement for each of the plurality of user networks, The number of channel groups belonging to the first user network and the number of channels in the channel group of each of the orthogonal channel group and the non-orthogonal channel group, Group including at least one of a channel group belonging to the orthogonal channel group and a channel group belonging to the non-orthogonal channel group, the channel group being generated by reflecting a network requirement for each of the plurality of user networks, And the first user net The channel group assigned to the size, it is possible to identify from among the plurality of channel groups according to the network requirements are determined based on the frequency hopping scheme is applied, the number of channels reflected for each of a plurality of said network user.
In addition, the identifying step may include: determining a channel group allocated to the first user network based on a network requirement for each of the plurality of user networks including at least one of an anti-jamming characteristic and a transmission rate According to a change factor including at least one of a change in network characteristics for each of the plurality of user networks or a change in channel characteristics due to environmental influences, A request to change the number of channels in the channel group assigned to the user network can be performed.
According to another aspect of the present invention, there is provided a communication method performed by a communication device belonging to a first user network of a plurality of user networks, An identification unit for identifying a channel group assigned to the first user network among the plurality of channel groups including the first user network; And a transmitter for transmitting a signal by applying a frequency hopping technique within the assigned channel group in the communication apparatus, wherein a part of the plurality of channel groups includes an orthogonal channel group having no channel overlapping with each other And a remaining part of the plurality of channel groups may form a non-orthogonal channel group having at least one channel overlapping with the channel group belonging to the orthogonal channel group.
Also, the identification unit may identify a channel group allocated to the first user network as a channel group belonging to the orthogonal channel group determined to satisfy a network requirement for each of the plurality of user networks, and a channel group belonging to the non- The number of channel groups, and the number of channels in the channel group of each of the orthogonal channel group and the non-orthogonal channel group, the channel group being allocated to the first user network , A plurality of channel groups including at least one of a channel group belonging to the orthogonal channel group and a channel group belonging to the non-orthogonal channel group generated by reflecting the network requirement for each of the plurality of user networks , And the first user network The assigned channel group, it can be identified from among the plurality of channel groups according to the network requirements are determined based on the frequency hopping scheme is applied, the number of channels reflected for each of a plurality of said network user.
In addition, the identification unit identifies the channel group allocated to the first user network as the plurality of the plurality of user networks reflecting the network requirements for each of the plurality of user networks including at least one of an anti-jamming characteristic and a transmission rate According to a change factor including at least one of a change in network characteristics for each of the plurality of user networks or a change in channel characteristics due to environmental influences, Lt; RTI ID = 0.0 > channel group < / RTI >
BACKGROUND OF THE
INDUSTRIAL APPLICABILITY The present invention has the effect of increasing the number of coexisting networks in the entire frequency band by reducing the occurrence frequency of MAI in a frequency hopping system, particularly an asynchronous frequency hopping system.
The present invention has the effect of increasing the overall frequency spectral efficiency in a frequency hopping system, particularly an asynchronous frequency hopping system.
The present invention has the effect of maximizing the number of coexistence networks while satisfying the requirements of each network (Quality of Service, QoS).
The present invention has the effect of improving the anti-jamming ability for partial band jamming or tone jamming by increasing the number of frequency channels in the channel group.
The present invention reduces MAI occurrence frequency of signals transmitted in each network, thereby reducing coding overhead and securing a data rate.
The present invention has the effect of improving the transmission rate by lowering the rate of the frequency channel in which the MAI occurs in the channel group.
The present invention has the effect of dynamically changing the frequency channel configuration in the group according to the change in the network characteristics of each of the plurality of user networks or the change in the channel characteristics due to environmental influences. That is, the number of channels in the channel groups of the orthogonal channel group and the non-orthogonal channel group can be changed dynamically.
1 shows an example in which each network utilizes a channel in a single channel system and a frequency hopping system.
2 is a diagram showing an example of signal transmission in a synchronous frequency hopping system and an asynchronous frequency hopping system.
FIG. 3 is a diagram illustrating a schematic configuration of a communication system to which a group-based frequency hopping technique according to an embodiment of the present invention is applied.
4 is a diagram illustrating an example of a channel group allocated to each user network according to an embodiment of the present invention.
5 is a diagram illustrating an example of a configuration of a channel group according to a change in network requirements according to an embodiment of the present invention.
FIG. 6 is a flowchart illustrating a communication method using a group-based frequency hopping technique according to an exemplary embodiment of the present invention.
FIG. 7 illustrates an example in which a channel group is configured such that an orthogonal channel group and a non-orthogonal channel group coexist according to an embodiment of the present invention.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In the following description of the embodiments of the present invention, specific values are only examples.
BACKGROUND OF THE
Prior to the description, a frequency hopping system is a system in which all networks share an entire frequency band (channel). Especially in the case of an asynchronous frequency hopping system, when transmission signals transmitted from different networks are received at any receiving end, The signals are not synchronized and a certain part of the transmission signal causes a mutual interference (MAI). This asynchronous frequency hopping system mainly occurs in a system where the maximum transmission distance of the network is large, because propagation delay time is longer than the hopping time, and it is difficult to synchronize all receiving ends. Examples of asynchronous frequency hopping systems are Link-16, which is used in the US military and NATO and its allied forces. In the past, diversity, diversity, and diversity have been proposed to overcome MAI interference in such asynchronous frequency hopping systems. Channel coding techniques have been additionally used, but the improvement level is not sufficient and the number of coexisting networks is small.
Accordingly, in order to increase the number of coexistence networks in the asynchronous frequency hopping system, the present invention divides the entire available frequency channels into a plurality of channel groups, and each of the plurality of user networks performs frequency hopping This paper proposes a technique for transmitting a signal by applying the same. The present invention refers to this proposed method as a group-based frequency hopping (GFH).
The present invention can reduce the occurrence frequency of MAI in the asynchronous frequency hopping system and increase the number of coexistence networks through the proposed group-based frequency hopping technique, thereby improving the overall frequency spectrum efficiency . In addition, the present invention can maximize the number of coexistence networks while satisfying the requirements of each network (Quality of Service, QoS), and can improve the anti-jamming ability and the transmission rate There is an advantage.
FIG. 3 is a diagram illustrating a schematic configuration of a communication system to which a group-based frequency hopping technique according to an embodiment of the present invention is applied.
3, a
The
The generating
In addition, the
The allocating
In addition, the
In addition, the
The generating
More specifically, if the requirement for an anti-jamming capability is high while a particular user network is communicating using a frequency hopping technique, then the user network's need for increased anti-jamming capability For example, the number of channels in a channel group composed of five existing channels can be dynamically changed to 11 in order to satisfy the requirement that the number of channels that can perform frequency hopping in the channel group allocated to the user network is larger. have. In order to meet the dynamically changed requirements of the user network for improving the transmission rate, it is advantageous to lower the frequency channel frequency at which the MAI occurs in the channel group. Therefore, considering the occurrence rate of the MAI, . An example of formation of a more detailed channel group is described in the description with reference to FIG. 5, and reference will be made thereto. In addition, when a detour channel is required as well as requirements of the network for improving the anti-jamming capability and improving the transmission rate, the number of channels in the channel group can be changed dynamically.
The frequency hopping
The
The
In addition, the
In addition, the
In addition, the identifying
4 is a diagram illustrating an example of a channel group allocated to each user network according to an embodiment of the present invention.
Prior to the description, the conventional frequency hopping system is a mode in which all coexisting networks share the entire frequency channels, while the group-based frequency hopping technique according to the present invention divides all available frequency channels into a plurality of channel groups, Each network selects a specific group and follows a method of performing frequency hopping within the selected group.
At this time, the present invention can be divided into an orthogonal channel group and a non-orthogonal channel group according to a method of dividing the entire available frequency channels into a plurality of channel groups, Orthogonal channel groups and non-orthogonal channel groups, and allocates the entire usable frequency channel to the non-orthogonal channel groups by the allocating
In this case, the orthogonal channel group refers to a case where there is no overlapping channel among a plurality of channel groups, that is, a case where there is no overlapping frequency band (channel) between the respective channel groups, When a non-orthogonal channel group has a channel that partially overlaps with a channel group belonging to the orthogonal channel group among a plurality of channel groups, that is, when there are some frequency bands (channels) overlapping among the channel groups .
In the example shown in FIG. 4, it is assumed that the same frequency band as that of FIG. 1 (ie, 1 to 12 frequency channels) is used and that the number of channel groups (that is, frequency channel groups) is four. In this case, A, B, C and D denote a channel group, and the channel groups A, B, C and D denote users (more specifically, a transmission side that can transmit data through a channel) B ', C', and D ', respectively. That is, a plurality of channels may be allocated to the group A, and a group of users who wish to transmit data through the channels of the group A may be referred to as an A 'group (network). In this case, since users who want to transmit data through the channels of the group A can form a single network, the group A 'can be interpreted as corresponding to one user network. Similarly, the B, C, and D channel groups can also be interpreted as corresponding to one user network B ', C', and D ', respectively.
Although one user network corresponds to one channel group in the above embodiment, the present invention is not limited to this, and one or a plurality of networks may correspond to one channel group. That is, although not shown, the user network to which the channel group A is allocated may be a plurality of networks such as A1 'and A2'.
4A is an example of dividing an entire frequency channel (i.e., the entire available channel) into orthogonal channel groups according to an embodiment of the present invention. In this case, the A, B, C, Three frequency channels may be secured. That is, the A channel group has (1, 4, 8) channel, the B channel group has (2,5,10) channel, the C channel group has (3,6,12) , 9,11) channels. At this time, since the channel groups A, B, C, and D do not overlap with each other, the channel groups A, B, C, and D are formed as orthogonal channel groups. Then, a network to which a specific group is allocated (for example, a network B 'to which a B-channel group is allocated) performs frequency hopping only on frequency channels belonging to the group. That is, the A 'network allocated with the A channel group performs frequency hopping only on the frequency channels belonging to the group (i.e., 1, 4, and 8 channels). At this time, because there are no channels overlapping each other due to the characteristics of the orthogonal channel group, MAI is not generated. Therefore, in the present invention, when a plurality of channel groups are formed only in the orthogonal channel group as shown in FIG. 4 (a), the number of coexisting networks can be maintained by the number of the minimum orthogonal channel groups. At this time, when each orthogonal channel group has only one channel, frequency hopping is not performed, and this follows the same scheme as the single channel system shown in FIG. 1 (a).
4B is an example in which the entire frequency channel (i.e., the entire available channel) is divided into a non-orthogonal channel group according to an embodiment of the present invention. Have four frequency channels. That is, the channel group A has (1,4,8,12) channels, the channel group B has the channels (2,4,6,10), the channel group C has the channels , And channel group D has (5, 7, 10, 12) channels. At this time, in order for each of the groups to have four frequency channels, a total of sixteen channels are required, but in this example, there are twelve channels, so that each group can not be configured orthogonally. Therefore, the channels in some groups of each group will be MAIs, and some channels will not have MAIs. That is, it can be confirmed that interference occurs in 4, 6, 10, and 12 channels, and interference does not occur in other channels. That is, since interference occurs in 4 channels between channel groups A and B, 6 channels between channel groups B and C, 10 channels between channel groups B and D, and 12 channels between channel groups A and D, Channel groups A, B, C, and D may be considered non-orthogonal channel groups.
4C is an example of dividing an entire frequency channel (i.e., the entire available channel) into a non-orthogonal channel group according to another embodiment of the present invention. 4C is different from FIG. 4B in that channel groups A, B, and C each have five frequency channels, and channel group D has twelve channels that are all frequency channels (1-12). In the case of FIG. 4 (c), MAI occurs in all the channels due to the channel group D having the entire frequency channels. However, as described above, the group-based frequency hopping technique according to the present invention divides all the available frequency channels into a plurality of channel groups, and each network selects a specific group and performs frequency hopping within the selected group Therefore, if frequency hopping is performed by selecting a channel group D having all the frequency channels in FIG. 4 (c), the same method as that of the general frequency hopping system shown in FIG. 1 (b) .
4, the present invention divides the entire frequency channel (or the entire available channel) into a plurality of channel groups, and performs frequency hopping within the selected corresponding channel group. As a result, Unlike the common frequency hopping system shown in FIG. 1 (b), each network makes a jump in only some formed channels without leaping over the entire frequency band, thereby increasing the number of coexistence networks limited by the MAI .
Meanwhile, when generating a frequency channel group (i.e., an orthogonal channel group and a non-orthogonal channel group) in the
More specifically, it is necessary to increase the number of frequency channels in a channel group to improve anti-jamming ability for partial band jamming or tone jamming. In order to increase the transmission rate, it is necessary to lower the rate of the frequency channel in which the MAI occurs in the channel group. That is, the smaller the MAI is, the lower the coding rate can be, and thus the transmission rate can be increased. Hereinafter, a configuration example of a channel group according to a change in network requirements will be described with reference to FIG.
5 is a diagram illustrating an example of a configuration of a channel group according to a change in network requirements according to an embodiment of the present invention.
Referring to FIG. 5, FIG. 5 illustrates a configuration of a channel group according to a change in network requirements. A total of 12 frequency channels are divided into three channel groups A, B, and C. FIG. It is assumed that the A, B, and C channel groups are allocated to the A ', B', and C 'user networks, respectively.
FIG. 5A shows a configuration of an initial channel group, and it is assumed that the requirements (QoS) of each network are the same. In this case, each of the user networks A ', B', and C 'requires six frequency channels for anti-jamming and requires two channels that do not generate MAI I suppose. 5 (a), the channel group A is composed of (1, 3, 4, 8, 10, 12) Channel, and the channel group C is composed of (2,5,6,7,10,12) channels, and each channel group is formed of six frequency channels.
FIG. 5 (b) shows a configuration of a channel group when the improvement of the anti-jamming ability among the requirements of the network is required. C 'user network requires 12 jamming channels requiring higher jamming capability than A', B 'user networks, and A' and B 'user networks are relatively low compared to C' user network. Lt; / RTI > channels. In this case, the configuration of the channel group of FIG. 5B is different from the configuration of the channel group of FIG. 5A in that the number of frequency channels in the channel group allocated to each of the entire user networks A ', B', and C ' Can be increased. 5 (b) shows that the number of frequency channels allocated to each user network is A 'and B' user networks is 6 to 7, and that of C 'user network is 6 To 12, it can be confirmed that the anti-jamming ability of each user network is improved.
FIG. 5 (c) shows a channel group configuration when a transmission rate improvement is required among network requirements. 5 (c), the number of frequency channels of the channel groups A, B, and C is five, and the number of frequency channels of the channel groups A, B, and C is six And the number of channels in which MAI does not occur is increased from 3 to 6 in the initial 6 to 9, so that the number of channels in which MAI is generated is reduced from 6 to 3 in the initial stage. That is, in the channel group configuration of FIG. 5C, the number of channels in which no MAI is generated among the five channels per channel group increases to three as compared with the initial channel group configuration of FIG. 5A, The number of channels is reduced to two. 5 (c), it can be seen that the signal transmitted from each user network undergoes less MAI compared to FIG. 5 (a) and FIG. 5 (b), thereby lowering the coding overhead and ensuring the transmission rate. can confirm.
Accordingly, according to the group-based frequency hopping technique proposed in the present invention, it is possible to maximize the number of coexistence networks while satisfying the requirements (Quality of Service, QoS) of each network.
FIG. 7 illustrates an example in which a channel group is configured such that an orthogonal channel group and a non-orthogonal channel group coexist according to an embodiment of the present invention.
7, the A channel group is composed of (1,4,7) channels, the B channel group is composed of (2,4,9) channels, the C channel group is composed of (3,6,9,11 ) Channel, and the D channel group may be composed of (5, 8, 10, 12) channels. In this case, (4) channels are overlapped between the A channel group and the B channel group, (9) channels are overlapped between the B channel group and the C channel group, and thus MAI interference occurs in the (4, 9) channel .
In the present invention, the A, B, and C channel groups that overlap at least one channel with another channel group are referred to as non-orthogonal channel groups, The D channel group in which no channel exists may be referred to as an orthogonal channel group. That is, when the channel group is formed as shown in FIG. 7, the orthogonal channel group and the non-orthogonal channel group can coexist. Although FIG. 7 shows an embodiment in which only one D channel group belongs to an orthogonal channel group, it will be understood by those skilled in the art that a plurality of channel groups may be included in an orthogonal channel group according to another embodiment of the present invention.
In another embodiment of the present invention, if the channel groups A, B, C form mutually excluded orthogonal channel groups, the channel groups D, E include channels overlapping each other, , E each form a non-orthogonal channel group that includes one or more channels that overlap with at least one of the channel groups A, B, In this case, since the MAI channel generated by the channel groups D and E belongs to only one of the channel groups A, B, and C, in the server managing the entire network, the channel groups A, B, and C ', B', C ', respectively) to adjust the MAI channel generated by channel groups D and E, respectively.
FIG. 6 is a flowchart illustrating a communication method using a group-based frequency hopping technique according to an exemplary embodiment of the present invention. Hereinafter, the operation flow chart will be briefly described based on the contents described above in detail.
First, in a communication in which a group-based frequency hopping technique according to an embodiment of the present invention is applied, a
At this time, the
Next, the allocating
At this time, the
The generating
Next, the
At this time, the identifying
In addition, the
In addition, the identifying
Next, in step S640, the
Thus, unlike the conventional frequency hopping system shown in FIG. 1 (b), the present invention can increase the number of coexistence networks limited by the MAI by allowing each network to hop only on some formed channels without leaping over the entire frequency band In addition, it is possible to secure the maximum number of coexistence networks while satisfying the requirements of each network (Quality of Service, QoS). A more detailed example will be described with reference to FIG. 5 above.
The communication channel allocation method or the frequency hopping communication method according to an embodiment of the present invention may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.
As described above, the present invention has been described with reference to particular embodiments, such as specific elements, and specific embodiments and drawings. However, it should be understood that the present invention is not limited to the above- And various modifications and changes may be made thereto by those skilled in the art to which the present invention pertains.
Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention .
300: Communication system to which group-based frequency hopping technique is applied
10: server 20: communication device by frequency hopping
310: Generation unit 320: Assignment unit
330: Identification unit 340:
Claims (19)
Allocating one of the plurality of channel groups to each of a plurality of user networks as a first channel group capable of transmitting a signal by applying a frequency hopping technique to each of the plurality of user networks;
Lt; / RTI >
Wherein the plurality of channel groups form an orthogonal channel group in which there is no channel overlapping with each other, and the remaining part of the plurality of channel groups forms a non-orthogonal channel group having at least one channel overlapping the channel group belonging to the orthogonal channel group. And forming a channel group.
The generating step
Determining a number of channel groups belonging to the orthogonal channel group and channel groups belonging to the non-orthogonal channel group to satisfy a network requirement for each of the plurality of user networks, And determining the number of channels in each channel group of the group.
The allocating step
One of the channel groups belonging to the orthogonal channel group or the channel group belonging to the non-orthogonal channel group is determined to be the first channel group and is allocated in accordance with the network requirement for each of the plurality of user networks. / RTI >
The allocating step
Determining a number of channels to which the frequency hopping technique is applied by reflecting a network requirement for each of the plurality of user networks, determining a channel group belonging to the orthogonal channel group or the non- Wherein one of the channel groups belonging to the group is determined to be the first channel group and allocated.
In the generating step or the allocating step
Wherein the number of channels in the channel group is determined to satisfy a network requirement for each of the plurality of user networks including at least one of an anti-jamming characteristic and a transmission rate .
In the generating step or the allocating step
Wherein the number of channels in each of the orthogonal channel groups and the non-orthogonal channel groups is set to be greater than a number of channels in each of the orthogonal channel groups and the non-orthogonal channel groups, according to a change factor including at least one of a change in network requirements or a change in channel characteristics for each of the plurality of user networks Wherein the communication channel is dynamically changeable.
Identifying a channel group assigned to a first user network among a plurality of channel groups including a channel among the entire available channels; And
Transmitting, at the communication apparatus, a signal by applying a frequency hopping technique within the assigned channel group;
Lt; / RTI >
Wherein the plurality of channel groups form an orthogonal channel group in which there is no channel overlapping with each other, and the remaining part of the plurality of channel groups forms a non-orthogonal channel group having at least one channel overlapping the channel group belonging to the orthogonal channel group. And a channel group is formed.
The step of identifying
A channel group allocated to the first user network is divided into a channel group belonging to the orthogonal channel group determined to satisfy the network requirement for each of the plurality of user networks and a channel group belonging to the non- And identifying among the plurality of channel groups based on the number of channels in the channel group of each of the orthogonal channel group and the non-orthogonal channel group.
The step of identifying
At least one of a channel group belonging to the orthogonal channel group and a channel group belonging to the non-orthogonal channel group generated by reflecting the network requirement for each of the plurality of user networks, And identifying the channel group among the plurality of channel groups.
The step of identifying
Characterized in that the channel group allocated to the first user network is identified from the plurality of channel groups based on the number of channels to which the frequency hopping technique determined by reflecting the network requirement for each of the plurality of user networks is applied A communication method by frequency hopping.
The step of identifying
Wherein the channel group assigned to the first user network is identified among the plurality of channel groups reflecting network requirements for each of the plurality of user networks including at least one of an anti- The frequency hopping method comprising:
The step of identifying
A request to change the number of channels in the channel group allocated to the first user network is performed according to a change factor including at least one of a change in network requirements or a change in channel characteristics for each of the plurality of user networks Wherein the communication channel allocation method comprises the steps of:
An identification unit for identifying a channel group assigned to a first user network among a plurality of channel groups including a part of all available channels; And
A transmission unit for transmitting a signal in a frequency hopping scheme within the allocated channel group;
Lt; / RTI >
Wherein the plurality of channel groups form an orthogonal channel group in which there is no channel overlapping with each other, and the remaining part of the plurality of channel groups forms a non-orthogonal channel group having at least one channel overlapping the channel group belonging to the orthogonal channel group. And a channel group is formed in the frequency hopping.
The identification unit
A channel group allocated to the first user network is divided into a channel group belonging to the orthogonal channel group determined to satisfy the network requirement for each of the plurality of user networks and a channel group belonging to the non- And identifying among the plurality of channel groups based on the number of channels in the channel group of each of the orthogonal channel group and the non-orthogonal channel group.
The identification unit
At least one of a channel group belonging to the orthogonal channel group and a channel group belonging to the non-orthogonal channel group generated by reflecting the network requirement for each of the plurality of user networks, Of the plurality of channel groups including at least one of the plurality of channel groups.
The identification unit
Characterized in that the channel group allocated to the first user network is identified from the plurality of channel groups based on the number of channels to which the frequency hopping technique determined by reflecting the network requirement for each of the plurality of user networks is applied A communication device by frequency hopping.
The identification unit
Wherein the channel group assigned to the first user network is identified among the plurality of channel groups reflecting network requirements for each of the plurality of user networks including at least one of an anti- The frequency hopping communication apparatus comprising:
The identification unit
A request to change the number of channels in the channel group allocated to the first user network is performed according to a change factor including at least one of a change in network requirements or a change in channel characteristics for each of the plurality of user networks The communication channel allocation apparatus comprising:
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| KR1020140150647A KR101669043B1 (en) | 2014-10-31 | 2014-10-31 | Communication Method And Apparatus By Frequency Hopping |
| PCT/KR2015/003147 WO2016068411A1 (en) | 2014-10-31 | 2015-03-31 | Communication method using frequency hopping and apparatus therefor |
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| KR101976719B1 (en) * | 2018-09-14 | 2019-05-09 | 엘아이지넥스원 주식회사 | Apparatus for Frequency Hopping Communication for Network Interference Avoidance |
| KR101986496B1 (en) * | 2018-09-14 | 2019-09-30 | 엘아이지넥스원 주식회사 | Method for Network Interference Avoidance Based on Frequency Hopping Communication |
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| KR101928934B1 (en) * | 2016-02-23 | 2018-12-13 | 주식회사 엘지화학 | Hetero-cyclic compound and organic light emitting device comprising the same |
| KR101908241B1 (en) | 2017-11-07 | 2018-10-15 | 국방과학연구소 | Apparatus for processing orthogonal frequency hopping communications and method for operating the same |
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| KR101068103B1 (en) * | 2009-06-24 | 2011-09-27 | 국방과학연구소 | Active repeater for anti-jamming and method thereof |
| KR101087280B1 (en) * | 2009-12-29 | 2011-11-29 | 아주대학교산학협력단 | The Wireless Communication Method For Based Orthogonal Frequency Division Multiple Access and The Apparatus Thereof |
| KR101181754B1 (en) | 2011-04-20 | 2012-09-11 | 국방과학연구소 | Anti-jamming performance improvement method and apparatus for SFH systems using diversity combining and adaptive transmission |
| KR101182214B1 (en) | 2011-04-20 | 2012-09-12 | 국방과학연구소 | Apprartus and method for operating hopping groups |
| KR101408080B1 (en) * | 2014-03-26 | 2014-06-18 | 국방과학연구소 | Multi-channel orthogonal digital signal processing transponder system and method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101976719B1 (en) * | 2018-09-14 | 2019-05-09 | 엘아이지넥스원 주식회사 | Apparatus for Frequency Hopping Communication for Network Interference Avoidance |
| KR101986496B1 (en) * | 2018-09-14 | 2019-09-30 | 엘아이지넥스원 주식회사 | Method for Network Interference Avoidance Based on Frequency Hopping Communication |
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| KR101669043B1 (en) | 2016-10-25 |
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