WO2011007539A1 - コグニティブ無線通信における情報共有方法,コグニティブ無線通信デバイス,及びコグニティブ無線通信システム - Google Patents
コグニティブ無線通信における情報共有方法,コグニティブ無線通信デバイス,及びコグニティブ無線通信システム Download PDFInfo
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- WO2011007539A1 WO2011007539A1 PCT/JP2010/004501 JP2010004501W WO2011007539A1 WO 2011007539 A1 WO2011007539 A1 WO 2011007539A1 JP 2010004501 W JP2010004501 W JP 2010004501W WO 2011007539 A1 WO2011007539 A1 WO 2011007539A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
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- the present invention relates to an information sharing method, a cognitive radio communication device, a cognitive radio communication system, and the like in cognitive radio communication, and more particularly to sensing information and sensing control information between a plurality of cognitive radio communication devices before establishing cognitive radio communication.
- the present invention relates to an information sharing method for sharing, a cognitive radio communication device capable of sharing information by the information sharing method, a cognitive radio communication system, and the like.
- Wireless communication is performed between multiple wireless communication devices.
- a frequency band is assigned to each wireless communication service.
- the wireless communication service is in a saturated state, but there is actually a frequency band that is hardly used. This indicates that the radio spectrum is not efficiently used.
- processing for establishing data communication is performed. Specifically, spectrum sensing is first performed over a special radio frequency range. Subsequently, the spectrum usage is analyzed based on the spectrum sensing results. Information is exchanged between components (nodes) constituting the cognitive radio communication system. Information exchanged includes sensing information and sensing control information. Here, these nodes can perform sensing themselves to generate sensing information, or can acquire sensing information from other nodes. In this way, each node shares sensing information with other nodes. This will increase the quality of sensing. Thereafter, the frequency band used for data communication in the cognitive radio communication system is determined. Thereby, data communication becomes possible.
- each node of the cognitive radio system cannot grasp the channel used for data communication until sensing is performed. Therefore, each node cannot grasp which channel should be used in order to share sensing information and sensing control information.
- the first aspect of the present invention relates to an information sharing method in cognitive radio communication.
- a detection step and an information sharing step are executed.
- the detection step is a step that is executed before a communication link for cognitive radio communication is established (for example, during a sensing period).
- a common channel that can be used among a plurality of wireless communication devices is detected.
- sensing information and sensing control information are shared among a plurality of wireless communication devices using this common channel. By using a shared channel in this way, sensing information and sensing control information can be exchanged efficiently and effectively.
- the wireless communication device may be a part of a device capable of wireless communication, or may be a device capable of wireless communication itself.
- the plurality of wireless communication devices may include a data archive (DA), for example.
- This data archive (DA) stores sensing information and sensing control information.
- the data archive (DA) transmits sensing information to other wireless communication devices (for example, cognitive engine (CE)) or transmits sensing control information to other wireless communication devices (for example, spectrum sensors). It is possible to
- the plurality of wireless communication devices include a spectrum sensor.
- This spectrum sensor is for performing spectrum sensing before a communication link is established.
- the information sharing method further includes a sensing step.
- the spectrum sensor performs spectrum sensing. Thereby, sensing information is obtained.
- the spectrum sensor transmits the sensing information obtained in the sensing step to another wireless communication device using the common channel. As a result, sensing information can be shared among a plurality of wireless communication devices.
- the plurality of wireless communication devices include a cognitive engine or a data archive.
- the cognitive engine is for generating sensing control information for controlling sensing by the spectrum sensor.
- the data archive is for storing or storing sensing control information generated by the cognitive engine and sensing information acquired by the spectrum sensor, and providing the sensing control information and sensing information to other wireless communication devices.
- the spectrum sensor performs spectrum sensing according to the sensing control information acquired via the common channel. By sharing sensing control information in this way, effective processing can be performed.
- the cognitive engine (CE) and the data archive (DA) are configured to store or save sensing information obtained by the spectrum sensor. That is, a cognitive engine (CE) and a data archive (DA) are examples of devices that function as clients of a spectrum sensor.
- the plurality of wireless communication devices include a data archive for storing information and a cognitive engine capable of reading the information stored in the data archive.
- the spectrum sensor transmits the sensing information obtained in the sensing step to the data archive using the common channel, thereby saving the information in the data archive.
- the cognitive engine can monitor the sensing information stored in the data archive.
- the common channel is detected from a frequency slot of the ISM band.
- the ISM band is a frequency band suitable for cognitive radio communication. According to this aspect, the ISM band can be used efficiently because it is used before the communication link is established.
- the second aspect of the present invention relates to a cognitive radio communication device capable of sharing information by the above information sharing method.
- the cognitive radio communication device according to this aspect may share information between other radio communication devices using a channel detected before the communication link for cognitive radio communication is established. It is a possible device.
- a third aspect of the present invention is a cognitive radio communication system including a plurality of cognitive radio communication devices according to the second aspect.
- the second and third side surfaces can also provide the same effects as the first side surface.
- information can be exchanged efficiently and effectively between a plurality of cognitive radio communication devices.
- white space since a non-use spectrum called white space is found and used for data communication, it is particularly effective for exchanging sensing information and sensing control information between different media (for example, a sensor and a sensor client). It is.
- sensing control information is disclosed in, for example, a pamphlet of WO2008-086243.
- FIG. 1 is a diagram schematically showing a configuration of a cognitive radio communication system according to the present invention.
- FIG. 2 is a block diagram showing the structure of the spectrum sensor in FIG.
- FIG. 3 is a diagram for schematically explaining the relationship among a plurality of components constituting the wireless communication system of FIG.
- FIG. 4 is a diagram showing an ISO model of the spectrum sensor and its client.
- FIG. 5 is a flowchart showing a processing procedure of a communication method implemented by the wireless communication system of FIG.
- FIG. 1 is a diagram schematically showing a configuration of a cognitive radio communication system according to the present invention.
- the cognitive radio communication system 100 shown in FIG. 1 includes a plurality of radio communication devices.
- data communication by cognitive radio communication is performed between a plurality of radio communication devices.
- the cognitive radio communication system 100 includes a base station 10 for a primary system, a base station 15 for a secondary system, a radio communication device 20 as a primary user, and a secondary user.
- Wireless communication devices 30 and 31, a spectrum sensor 40, and a data archive 50 are included as components. Note that both the data archive 40 and the spectrum sensor 50 function as wireless communication devices.
- the components of the cognitive radio communication system 100 are configured to be able to communicate with each other, thereby forming the radio network 1.
- the components of the cognitive radio communication system 100 are connected to the radio network 1.
- the cognitive radio communication system 100 includes the Internet backbone 3 so that each component can be connected to the Internet via the radio network 1.
- An example of the Internet backbone 3 is a public switched telephone network (PSTN).
- FIG. 1 also shows a base station 15 'for a secondary system of another wireless communication system.
- the base station 15 ′ is arranged outside the range (communication range) in which the wireless communication system 100 can perform wireless communication via the wireless network 1.
- the base station 15 ′ can also communicate with a wireless communication device (for example, the base station 15) within the communicable range of the wireless communication system 100 and functions as a secondary user. Therefore, such secondary users are also examples of components of the cognitive radio communication device 100.
- the base station 10 for the primary system and the base station 15 for the secondary system are connected to each other via a wired or wireless connection, and can transmit / receive information to / from each other.
- the base station 15 for the secondary system is equipped with a cognitive engine (CE) 15a.
- the cognitive engine (CE) 15a is a control device for performing cognitive radio communication with other radio communication devices, and directly wirelessly communicates with the base station 10 via the radio network 1. Communication is possible.
- the cognitive engine (CE) 15a specifies a frequency band to be used by the wireless communication devices when the pair of wireless communication devices performs cognitive wireless communication, and performs wireless communication using the specified frequency band.
- the control signal is transmitted to both of the pair of wireless communication devices.
- the wireless communication device 20 can transmit and receive data to and from the base stations 10 and 15 via the wireless network 1 or the Internet backbone 3.
- Both the wireless communication devices 30 and 31 can transmit and receive data to and from the base stations 10 and 15 via the wireless network 1 or the Internet backbone 3 in the same manner as the wireless communication device 20.
- the wireless communication devices 30 and 31 are both wireless communication devices equipped with a cognitive engine (CE) 30a.
- the cognitive engine (CE) 30a has a function equivalent to that of the cognitive engine (CE) 15a.
- the wireless communication device 20 and the wireless communication devices 30 and 31 can perform direct communication with each other (P2P communication) by operating according to a control signal from the wireless communication device on which the cognitive engine is mounted. Yes.
- the wireless communication device 30 and the wireless communication device 31 include the cognitive engine 30a, it is possible to perform P2P communication with other wireless communication devices using the cognitive engine 30a. .
- the wireless communication device 31 further includes a spectrum sensor 40a.
- the spectrum sensor 40a has a function equivalent to that of the spectrum sensor 40.
- the wireless communication device 30 is not equipped with the spectrum sensor 40a.
- the spectrum sensor 40 is a device for performing spectrum sensing, and is a stand-alone sensor arranged so as to be distributed in the wireless network 1.
- the spectrum sensor 40a is different from the spectrum sensor 40 in that it is not a stand-alone type.
- spectrum sensing refers to sensing performed in order to efficiently promote spectrum use opportunities.
- the data archive 50 is for storing information systematically (for example, with time information), and functions as a recording unit, a data source, or a database in the wireless communication system 100.
- the data archive 50 stores sensing information transferred from a plurality of spatially distributed spectrum sensors.
- the major difference between the data archive 50 and the cognitive engine (CE) is that the data archive 50 does not make decisions regarding spectrum usage.
- sensing information stored in the data archive 50 is read out by another wireless communication device (for example, cognitive engine (CE)) and used for, for example, spectrum monitoring.
- the information stored in the data archive 50 is not limited to sensing information, and may be other information such as sensing control information.
- the data archive 50 since the data archive 50 has memorize
- the data archive 50 is a stand-alone type, but may be incorporated in the base stations 10 and 15 and the wireless communication devices 20, 30 and 31.
- FIG. 2 is a block diagram showing the structure of the spectrum sensor 40 in FIG.
- the spectrum sensor 40a has the same configuration as the spectrum sensor 40.
- the spectrum sensor 40 includes a communication module 41 and a sensing module 45 as shown in FIG.
- the communication module 41 and the sensing module 45 are configured to operate in cooperation with each other.
- the communication module 41 includes a transmission / reception unit 42 and a wireless communication module controller 43.
- the transmission / reception unit 42 transmits sensing information using a sensing auxiliary control channel (ACS), which will be described later, and receives sensing control information using the sensing auxiliary control channel (ACS).
- the sensing auxiliary control channel (ACS) is an example of a common channel between the spectrum sensor 40 and the client.
- the wireless communication module controller 43 is for performing various types of control in the communication module 41. For example, the wireless communication module controller 43 exchanges information with the sensing module 45 and handles information transmitted and received by the transmission / reception unit 42.
- the sensing module 45 includes a detector 46, a sensing information processing unit 47, a memory 48, and a power supply unit 49.
- the detector 46 is for receiving a radio signal.
- the detector 46 includes an RF chain 46a, an analog / digital converter (A / D converter) 46b, and a signal detector 46c.
- the memory 48 stores information related to the spectrum sensor 40. For example, a sensor manufacturing information sheet, a sensor ID, and a sensor data sheet are stored.
- the power supply unit 49 supplies electric power necessary for the sensing module 45 to operate.
- the sensing module 45 when a radio signal is received via the RF chain 46a, the received radio signal is digitized by the A / D converter 46b, and the signal detection unit 46c detects a necessary signal from the digital signal. .
- the detected signal is input to the sensing information processing unit 47 as sensing information.
- the sensing information processing unit 47 reads information on the spectrum sensor 40 from the memory 48 and processes sensing information input from the signal detection unit 46c as necessary.
- the sensing information processing unit 47 exchanges information with the wireless communication module controller 43.
- FIG. 3 is a diagram for schematically explaining the relationship among a plurality of components constituting the wireless communication system 100 of FIG.
- FIG. 3 shows some of the components constituting the cognitive radio communication system 100 of FIG. Specifically, the wireless network 1, the first cognitive engine (CE), the second cognitive engine (CE), the data archive 50, the first spectrum sensor, and the second spectrum sensor are illustrated. 2.
- the first cognitive engine (CE) corresponds to, for example, the cognitive engine (CE) 30 a mounted on the wireless communication device 30.
- the second cognitive engine (CE) corresponds to, for example, a cognitive engine (CE) 15 a mounted on the base station 15.
- the first cognitive engine (CE) and the second cognitive engine (CE) may correspond to the cognitive engine (CE) 30 a mounted on the wireless communication device 31.
- the first spectrum sensor corresponds to, for example, a stand-alone type spectrum sensor 40.
- the second spectrum sensor corresponds to, for example, the spectrum sensor 40a mounted on the wireless communication device 31. Note that the second spectrum sensor may be a spectrum sensor different from the first spectrum sensor.
- the number of channel types is roughly divided into two. Specifically, one is a channel that can also be formed by the conventional technology, and as shown in FIG. 3, the wireless network 1 and the first cognitive engine (CE) or the second cognitive engine (CE). A channel 60 is formed therebetween.
- An example of the channel 60 is a cognitive pilot channel (CPC: cognitive pilot channel).
- the cognitive pilot channel (CPC) is a channel used for, for example, informing spectrum use related information to a primary user located in a predetermined section (cellular area).
- the other is a channel formed between components.
- This channel is formed during the sensing period and is mainly used during the sensing period. For this reason, in this specification, this channel is referred to as an auxiliary control channel for sensing (ACS: auxiliary control channel for sensing).
- ACS auxiliary control channel for sensing
- the sensing auxiliary control channel (ACS) 65a is a channel formed between a pair of spectrum sensors in the sensing period.
- the sensing auxiliary control channel (ACS) 65b is a channel formed between the cognitive engine (CE) and the spectrum sensor in the sensing period.
- the sensing auxiliary control channel (ACS) 65c is a channel formed between the data archive 50 and the spectrum sensor in the sensing period.
- the sensing auxiliary control channel (ACS) 65d is a channel formed between the cognitive engine (CE) and the data archive 50 in the sensing period.
- the sensing auxiliary control channel (ACS) 65e is a channel formed between a pair of cognitive engines (CE) in the sensing period.
- FIG. 4 is a diagram showing an ISO model of the spectrum sensor 40 and its client. The example shown in FIG. 4 is applicable not only to the spectrum sensor 40 but also to the spectrum sensor 40a.
- the spectrum sensor 40 and its client can communicate with each other via a sensing auxiliary control channel (ACS).
- Both the spectrum sensor 40 and the client have a PHY layer and a MAC layer in the ISO model.
- another spectrum sensor, a cognitive engine (CE), or a data archive 50 can be considered as the client.
- the sensing auxiliary control channel (ACS) corresponds to the PHY layer and MAC layer of the ISO model.
- the spectrum sensor 40 and its client use the sensing auxiliary control channel (ACS) as a common channel, so that a network is formed even during the sensing period, and information can be exchanged between the two.
- ACS sensing auxiliary control channel
- This enables P2P communication between the spectrum sensor 40 and its client even during the sensing period.
- the ISO model is shown as shown in FIG.
- a channel is formed between a pair of wireless communication devices that are close to each other, and information exchange can be performed quickly by actually using the channel.
- the pair of wireless communication devices are close to each other, it is possible to reduce energy loss necessary for information exchange. Therefore, information exchange can be performed efficiently and with high robustness. That is, according to this aspect, it is possible to efficiently and effectively exchange sensing information and sensing control information.
- the frequency band allocated to the sensing auxiliary control channel (ACS) is set to be known in advance by a terminal device (for example, a cognitive engine (CE), a spectrum sensor, or a data archive) during communication.
- a terminal device for example, a cognitive engine (CE), a spectrum sensor, or a data archive
- the frequency band for industrial chemical medicine A frequency band of the auxiliary control channel for sensing (ACS) is set in consideration of a predetermined frequency slot (wireless channel) in the band: Industry-Science-Medical band.
- the frequency band of the sensing auxiliary control channel (ACS) is set to a frequency slot selected from the 2.4 GHz band (2.4 to 2.5 GHz) or the 5.8 GHz band (5.725 GHz to 5.875 GHz). Is done.
- the frequency band of the auxiliary control channel for sensing may be set in consideration of the existing wireless technology (wireless communication service).
- a low-rate wireless personal area network LR-WPAN: low rate personal area network
- Zigbee registered trademark
- Bluetooth registered trademark
- IEEE 802.11 or infrared communication
- the frequency band corresponding to the physical layer for ultra-wideband (UWB PHY) in the standard is a candidate for the frequency band of the auxiliary control channel for sensing (ACS).
- UWB PHY ultra-wideband
- one candidate selected by a predetermined method may be assigned to each auxiliary sensing control channel (ACS), or a plurality of candidates may be assigned in an alternative manner.
- existing technologies such as LR-WPAN, Zigbee, and Bluetooth (registered trademark)
- the frequency band of the auxiliary control channel (ACS) for sensing may be set in consideration of both the frequency slot and the existing wireless technology.
- the width of the frequency band assigned to the sensing auxiliary control channel (ACS) is narrow.
- the frequency band width of the auxiliary control channel for sensing (ACS) is set narrower than the frequency band width allocated to the wireless communication service. This is because in the auxiliary control channel for sensing (ACS), limited information such as sensing information and sensing control information only needs to be exchanged between components. In addition, since information to be exchanged is limited, it is possible to set a low data rate (for example, several hundred kb / s) in a communication link that uses the auxiliary sensing control channel (ACS). .
- the sensing auxiliary control channel supports bidirectional data communication (information flow) between the components in order to exchange information between the components.
- a wireless communication device as a client can transmit a control signal for optimizing spectrum sensing activity to the spectrum sensor. It is also possible to control the spectrum sensor so that spectrum sensing is performed in a special frequency band. Furthermore, the spectrum sensor can be controlled so that signal detection is performed at a specific false alarm rate. Further, the spectrum sensor can transmit corresponding information to the wireless communication device in accordance with a control message or control command included in the received control signal.
- FIG. 5 is a flowchart showing a processing procedure of a communication method performed by the wireless communication system 100 of FIG.
- a processing procedure of a communication method performed between the spectrum sensor 40 and its client will be described as an example.
- step S10 spectrum sensing is performed in the sensing period of steps S10 to S40. Specifically, in step S10, the spectrum sensor 40 detects a sensing auxiliary control channel (ACS).
- ACS sensing auxiliary control channel
- steps S20 to S40 information is exchanged between a plurality of wireless communication devices using the auxiliary sensing control channel (ACS).
- the exchanged information includes sensing information obtained by spectrum sensing and sensing control information for controlling sensing.
- the sensing control information is generated by a cognitive engine (CE) and is generated based on the sensing information.
- This sensing control information includes information on the frequency band for sensing.
- the spectrum sensor 40 receives a sensing instruction (sensing control information) from the client via the auxiliary sensing control channel (ACS) (step S20).
- a sensing instruction sensing control information
- ACS auxiliary sensing control channel
- the spectrum sensor 40 executes spectrum sensing according to the received instruction. Then, the spectrum sensor 40 transmits sensing information obtained as a result of spectrum sensing to a client (for example, a cognitive engine (CE)) via a sensing auxiliary control channel (ACS).
- a client for example, a cognitive engine (CE)
- CE cognitive engine
- ACS sensing auxiliary control channel
- the series of processing in steps S10 to S40 is also executed in other spectrum sensors.
- a wireless communication device that does not perform spectrum sensing for example, data archive (DA)
- DA data archive
- ACS sensing auxiliary control channel
- sensing information is collected in the cognitive engine (CE). Then, the cognitive engine (CE) determines a pair of wireless communication devices to perform data communication and a frequency band for the pair of wireless communication devices to perform data communication based on the collected sensing information. Specifically, the frequency band is determined by finding an unused spectrum (white space) from the analysis result of the spectrum usage status. Information on the determined frequency band is also transmitted to the corresponding pair of wireless communication devices via the auxiliary sensing control channel (ACS).
- ACS auxiliary sensing control channel
- step S50 the pair of wireless communication devices attempting to perform wireless communication establishes (sets up) a communication link according to the sensing control information, and performs data communication (for example, P2P communication) by cognitive wireless communication.
- the frequency band used in this data communication is determined by a cognitive engine (CE).
- Data communication may be performed using the sensing auxiliary control channel (ACS), but the data communication is preferably performed using a channel dedicated to data communication.
- the spectrum sensors 40 and 40a are configured to be able to perform cooperative sensing / cooperative sensing.
- cooperative sensing is sensing performed between wireless communication devices equipped with the spectrum sensor 40a
- collaborative sensing is performed between the stand-alone type spectrum sensors 40.
- Sensing is performed.
- the spectrum sensor 40 and the spectrum sensor 40a perform spectrum sensing in response to a request (instruction) from the cognitive engine (CE), and transfer the sensing result to the cognitive engine (CE) as sensing information. Thereby, sensing information is collected in the cognitive engine (CE).
- the cognitive engine (CE) identifies a group (set) of spectrum sensors based on the collected sensing information.
- the sensing auxiliary control channel is used for communication between the spectrum sensors and for communication between the spectrum sensor and the cognitive engine (CE).
- the spectrum sensors 40 and 40a are configured to be able to perform cooperative sensing / cooperative sensing.
- the spectrum sensor 40 and the spectrum sensor 40a perform spectrum sensing according to a request (instruction) from the cognitive engine (CE) or periodically, and transfer the sensing result to the data archive 50 as sensing information.
- the sensing information is collected in the data archive 50.
- the data archive 50 stores them.
- the sensing information transferred intermittently is sequentially stored in the data archive 50.
- the sensing information stored in the data archive 50 is used for spectrum monitoring.
- the sensing auxiliary control channel (ACS) is used for communication between spectrum sensors and for communication between the spectrum sensor and the data archive 50.
- each wireless communication device is configured to be able to perform cooperative sensing / cooperative sensing.
- Each wireless communication device identifies a wireless communication device that may collaborate in response to a request from another wireless communication device, and the wireless communication device has a special available to the wireless communication device.
- Specific sensing information related to a specific frequency band (one or a plurality of types of frequency bands).
- This request preferably includes spectrum use related information.
- the spectrum usage related information includes information on frequency band, information on center frequency, information on frequency band occupancy, and information on sensing performance (probability of false alarm, probability of false detection).
- each wireless communication device can collect in advance spectrum use related information necessary for subsequent data communication.
- the sensing auxiliary control channel (ACS) is used for communication between cognitive radio communication devices.
- the common channel that can be used for information exchange is detected in the preparation period before the communication link is established, and the detected channel is used as the auxiliary control channel. Therefore, sharing of sensing information and sensing control information between wireless communication devices is performed promptly. This makes it possible to quickly establish a communication link. That is, according to this aspect, it is possible to provide an information sharing method in cognitive radio communication that can efficiently and effectively exchange sensing information and sensing control information. In addition, existing protocols and specifications can be used to use these shared channels.
- the auxiliary control channel can be used to transfer sensing information from the spectrum sensor.
- other wireless communication devices can also share sensing information.
- the sensing capability is increased.
- ACS sensing auxiliary control channel
- the reliability of sensing can be improved and robust spectrum sensing can be realized.
- it is preferable that a plurality of spectrum sensors are spatially distributed in the wireless communication system 100. As a result, fading due to multipath is reduced, and reliability can be further improved.
- the auxiliary control channel can also be used to receive sensing control information from other wireless communication devices and sensing information from a spectrum sensor.
- sensing information from other wireless communication devices and sensing information from spectrum sensors can be collected. This is particularly effective when the wireless communication device is a spectrum sensor client.
- the wireless communication device when the wireless communication device is a data archive, a plurality of information (sensing information and sensing control information) from other wireless communication devices are stored in the data archive together with information about time. Therefore, by reading a series of information stored in the data archive, for example, the series of information can be monitored. In addition, it is possible to quickly acquire rich information from the data archive.
- the frequency band of the auxiliary control channel is a frequency slot selected from the ISM band.
- the frequency band of the auxiliary control channel is preferably a frequency slot selected from the 2.4 GHz band (2.4 to 2.5 GHz). Since the 2.4 GHz band is used for wireless LAN, wireless PAN, and short-range communication, it is possible to easily detect the auxiliary control channel.
- the wireless communication device may be a part of a device capable of wireless communication, or may be a device capable of wireless communication.
- the plurality of wireless communication devices may include a data archive, for example.
- the present invention can be suitably used in fields such as wireless communication, particularly cognitive wireless communication.
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Abstract
Description
Control Channel For Spectrum Sensing in Cognitive Radio Systems”として公表される予定である。
3 インターネットバックボーン
10,15,15’ 基地局
20,30,31 無線通信デバイス
30a コグニティブエンジン(CE)
40,40a スペクトラムセンサー
41 通信モジュール
42 送受信部
43 無線通信モジュールコントローラー
45 センシングモジュール
46 検出器
46a RFチェーン
46b アナログ/ディジタル変換器(A/D変換器)
47 センシング情報処理ユニット
48 メモリ
49 電源ユニット
50 データアーカイブ
60 チャネル
65,65a~65e センシング用補助制御チャネル(ACS)
100 コグニティブ無線通信システム
Claims (7)
- コグニティブ無線通信における情報共有方法であって,
コグニティブ無線通信用の通信リンクが確立する前に,複数の無線通信デバイスの間で利用可能な共通チャネルを検出する検出ステップと,
前記検出ステップで検出された共通チャネルを利用して,前記複数の無線通信デバイスの間で,センシング情報及びセンシング制御情報を共有する情報共有ステップと
を含む,
情報共有方法。 - 前記複数の無線通信デバイスは,
前記通信リンクが確立する前にスペクトラムセンシングを行うスペクトラムセンサーを含み,
前記情報共有方法は,さらに,
前記スペクトラムセンサーが前記スペクトラムセンシングを行うことで,センシング情報を得るセンシングステップを含み,
前記情報共有ステップでは,
前記スペクトラムセンサーが,前記センシングステップで得られたセンシング情報を,前記共通チャネルを利用して,他の無線通信デバイスに送信することで,前記複数の無線通信デバイスの間でセンシング情報を共有する,
請求項1に記載の情報共有方法。 - 前記複数の無線通信デバイスは,
前記スペクトラムセンサーによるセンシングを制御するためのセンシング制御情報を生成するコグニティブエンジン,又は生成されたセンシング制御情報及びセンシング情報を記憶し,かつ他の無線通信デバイスにセンシング制御情報及びセンシング情報を提供するためのデータアーカイブを含み,
前記センシングステップでは,
前記スペクトラムセンサーが,前記共通チャネルを介して取得した前記センシング制御情報に応じて,前記スペクトラムセンシングを行う,
請求項2に記載の情報共有方法。 - 前記複数の無線通信デバイスは,
情報を保存するためのデータアーカイブと,
前記データアーカイブに保存された情報を読み出し可能なコグニティブエンジンと
を含み,
前記情報共有ステップでは,
前記スペクトラムセンサーが,前記センシングステップで得られたセンシング情報を,前記共通チャネルを利用して,前記データアーカイブに送信することで,当該データアーカイブに保存させ,これにより,前記コグニティブエンジンが前記データアーカイブに保存されたセンシング情報をモニタリングすることを可能にする,
請求項2に記載の情報共有方法。 - 前記検出ステップでは,
前記共通チャネルが,ISMバンドの周波数スロットから検出される,
請求項1~4のいずれか1項に記載の情報共有方法。 - コグニティブ無線通信用の通信リンクが確立する前に検出されたチャネルを利用して,他の無線通信デバイスの間で情報を共有するための手段を有する,
コグニティブ無線通信デバイス。 - 複数の無線通信デバイスを含むコグニティブ無線通信システムであって,
コグニティブ無線通信用の通信リンクが確立する前に検出されたチャネルを利用して,前記複数の無線通信デバイスの間で情報を共有するための手段を有する,
コグニティブ無線通信システム。
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US13/383,982 US8831520B2 (en) | 2009-07-13 | 2010-07-12 | Information sharing method in cognitive radio communication, cognitive radio communication device, and cognitive radio communication system |
EP10799603.5A EP2456250A4 (en) | 2009-07-13 | 2010-07-12 | METHOD FOR SHARING INFORMATION IN COGNITIVE RADIOCOMMUNICATION, COGNITIVE RADIO COMMUNICATION DEVICE AND COGNITIVE RADIO COMMUNICATION SYSTEM |
CN201080031612.7A CN102484795B (zh) | 2009-07-13 | 2010-07-12 | 认知无线通信中的信息共享方法、认知无线通信装置以及认知无线通信系统 |
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JP2009165167A JP5610333B2 (ja) | 2009-07-13 | 2009-07-13 | コグニティブ無線通信における情報共有方法 |
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EP (1) | EP2456250A4 (ja) |
JP (1) | JP5610333B2 (ja) |
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CN102355738B (zh) * | 2011-06-29 | 2014-05-07 | 中国人民解放军理工大学 | 基于协同中继的认知simo网络接入方法 |
KR101826361B1 (ko) * | 2011-12-15 | 2018-03-23 | 한국전자통신연구원 | 접속 인지 신호를 이용하는 유휴 대역 활용 시스템 |
CN104320441B (zh) * | 2014-10-09 | 2017-10-27 | 中国电子科技集团公司第二十研究所 | 无线通信系统间信息共享方法 |
US9699663B1 (en) * | 2015-02-20 | 2017-07-04 | Kathryn Jovancevic | Spectrum sharing system |
US20180091981A1 (en) * | 2016-09-23 | 2018-03-29 | Board Of Trustees Of The University Of Arkansas | Smart vehicular hybrid network systems and applications of same |
US10506555B2 (en) * | 2016-10-14 | 2019-12-10 | Rurisond, Inc. | System and method for identifying and using an optimum shared spectrum segment as a delay tolerant, low duty-cycle, cooperative communication medium for terrain independent connection |
US10268779B2 (en) | 2017-08-09 | 2019-04-23 | International Business Machines Corporation | Sharing server conversational context between multiple cognitive engines |
EP4154629A1 (en) * | 2020-05-22 | 2023-03-29 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Cooperative sensing for sidelink communication |
US11665564B2 (en) | 2021-02-08 | 2023-05-30 | Rurisond, Inc. | System and method for generation of shared signal frequency map for frequency sharing choice |
CN114281916B (zh) * | 2021-12-23 | 2022-07-12 | 中国城市规划设计研究院深圳分院 | 一种基于要素流动大数据的边界效应测度方法 |
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Also Published As
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EP2456250A4 (en) | 2016-11-16 |
EP2456250A1 (en) | 2012-05-23 |
US8831520B2 (en) | 2014-09-09 |
US20120135772A1 (en) | 2012-05-31 |
CN102484795B (zh) | 2015-01-07 |
JP5610333B2 (ja) | 2014-10-22 |
KR20120039626A (ko) | 2012-04-25 |
CN102484795A (zh) | 2012-05-30 |
JP2011023840A (ja) | 2011-02-03 |
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