TW200904036A - Communications system agnostic to the transmission medium - Google Patents

Communications system agnostic to the transmission medium Download PDF

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Publication number
TW200904036A
TW200904036A TW97108795A TW97108795A TW200904036A TW 200904036 A TW200904036 A TW 200904036A TW 97108795 A TW97108795 A TW 97108795A TW 97108795 A TW97108795 A TW 97108795A TW 200904036 A TW200904036 A TW 200904036A
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Taiwan
Prior art keywords
power line
signal
transmission medium
communication system
communication
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TW97108795A
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Chinese (zh)
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TWI461012B (en
Inventor
Claret Jorge Vicente Blasco
Canton Luis Manuel Torres
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Diseno Sistemas Silicio Sa
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B3/00Line transmission systems
    • H04B3/54Systems for transmission via power distribution lines
    • H04B3/542Systems for transmission via power distribution lines the information being in digital form
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B2203/00Indexing scheme relating to line transmission systems
    • H04B2203/54Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5429Applications for powerline communications
    • H04B2203/5441Wireless systems or telephone
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B2203/00Indexing scheme relating to line transmission systems
    • H04B2203/54Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5429Applications for powerline communications
    • H04B2203/5445Local network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B2203/00Indexing scheme relating to line transmission systems
    • H04B2203/54Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5429Applications for powerline communications
    • H04B2203/545Audio/video application, e.g. interphone

Abstract

Which permits communication capacities to be achieved adequate for multimedia applications such as high definition video in a house by means of using hybrid devices for multimedia communication via the power line (4) and aerial medium radiated by that power line (4) without any need to make frequency changes in the signal sent in the different mediums. The energy distribution in the different mediums is done by means of reinforcing the unbalancing effects of the power line, modifying the amount of signal that is going to be conducted by the power line (4) and the amount of signal that is going to be radiated in each case.

Description

200904036 九、發明說明: 【發明所屬之技術領域】 如此份描述性說明書之發明名稱中所提及,本發明係關 於一種通信系統,其利用_配t網 —K諸如家中之電力線)之雙重輕射及傳導性質,以 改良有關僅使用使用-通信媒體之系統的覆蓋範圍及傳輸 能力。 本文提出之系統之主要優點是,不需要任何頻率改變以200904036 IX. Description of the invention: [Technical field to which the invention pertains] As mentioned in the title of the invention of such a descriptive specification, the present invention relates to a communication system which utilizes a double light of a power line such as a power line in a home. Shooting and conducting properties to improve the coverage and transmission capabilities of systems that use only communication-communication media. The main advantage of the system presented in this paper is that no frequency changes are required.

在不同媒體中傳輪,而县、士工ϋ U 向疋貫仃在故兩種媒體中直接傳輸相 同信號,調節被注入至每一媒體令之能量。 【先前技術】 在大多數電信系統中,最根本之問題用充分之傳輸能力 來達成足夠之覆蓋範圍。一般來說,此藉由增加被引入到 通信媒體之能量予以實現,但是位準受限制於在不同國家 中現有之規;在空中媒體之情況下’這能量被有力地散 佈在一度二間中,所以這些規定僅允許足以保證連接高達 100米(配合一經定義頻寬)的一定發射。在現實中,障礙物 之存在及傢俱之分佈意味著無線連接不保證足夠之頻寬用 於多媒體應用(諸如高清晰度視訊)遍及整個家中,因此在 實踐中需要找到替代之解決方案。 在發展中技術中存在嘗試找到這些解決方案的其他系 統,比如混合式電力線/wiFi網路之使用,如出現在專利 權第US 62434丨3號之專利及公開案第us 2〇〇6〇194575號之 專利中。在k些文件中,在空中媒體中獨佔地實行韓射, 129766.doc 200904036 :達,在正考慮中之系統設備之間的無線通信。雖然這些 、統提供了有效之解決方案,但是必須藉由使用外差以在 某體中實仃對每—媒體之頻率的最終調適,其增加了成本 並且限制了解決方案之功能。另—方自,在本專利中提出 之系統用連接到傳導網路之—系列終端及無線類型之其他 終端連同該兩種終端之間的連接可能性,注人相同之信號 到不同之媒體中而沒有任何頻率變化,從而避免發展中技 術之解決方案之弊端。In different media, the wheels are transmitted, and the county and the sergeant ϋ 疋 疋 传输 传输 传输 直接 直接 直接 直接 直接 直接 直接 直接 直接 直接 直接 直接 直接 直接 直接 直接 直接 直接 直接 直接 直接 直接 直接 直接[Prior Art] In most telecommunication systems, the most fundamental problem is to achieve sufficient coverage with sufficient transmission capacity. In general, this is achieved by increasing the amount of energy introduced into the communication medium, but the level is limited to the existing rules in different countries; in the case of airborne media, this energy is strongly spread in one or two rooms. Therefore, these regulations only allow a certain emission sufficient to ensure a connection of up to 100 meters (with a defined bandwidth). In reality, the presence of obstacles and the distribution of furniture means that wireless connectivity does not guarantee sufficient bandwidth for multimedia applications, such as high-definition video, throughout the home, so alternative solutions are needed in practice. Other systems in the development of technology that attempt to find such solutions, such as the use of hybrid power lines/wiFi networks, such as those appearing in patent No. US 62,434, and the disclosure of the patent number 2 〇〇 6〇 194575 In the patent. In some of these documents, the Korean shot was exclusively implemented in the air media, 129766.doc 200904036: Up, wireless communication between the system devices under consideration. While these systems provide an effective solution, the final adaptation of the frequency of each medium must be achieved by using heterodyne in one body, which adds cost and limits the functionality of the solution. In addition, the system proposed in this patent uses a series of terminals connected to the conductive network and other terminals of the wireless type together with the possibility of connection between the two terminals, and the same signal is injected into different media. There are no frequency changes to avoid the drawbacks of developing technology solutions.

【發明内容】 為了達到這個目標以及避免在【先前技術】中描述之弊 端,本發明由一種不知傳輸媒體之通信系統組成,其包括 至少一接收器及一連接到一單個介面之發射器,該介面用 於注入通信信號到一電力線;其特徵為,用於該信號之該 注入介面配備一個模組,用於經由電力線及經由藉由該電 力線輪射之空中媒體兩者分配該通信信號之能量。 用於電力分配之模組包括加強電力線之不平衡效應之構 件’以增加在共同模式中之信號部分,其產生開始於傳導 之信號之電磁輻射。 此外’加強電力線之不平衡效應之構件繼而提供包含改 變傳導及輻射能量之間之比例之可能性的構件,其實行在 該兩個比例之間的調節。 從接收觀點來看’形成該通信系統之接收器配備用於經 由該電力線之信號的一接收模組、配備用於經由空中媒體 之發射信號的一接收模組,或配備該兩個模組。 129766.doc 200904036 同樣,從傳輪觀點來看,並且歸因於提供改變介於傳導 及輻射能置之間之比例之可能性,本發明提供經由電力 線、左由二中媒體或經由該兩個媒體傳送之信號之可能 性。 〜 月匕 最後,該通信系統可能還包含轉發接收到之信號之裝 置,以擴展該通信系統覆蓋範圍為目的。 下文,為了促進更好地理解此份說明書且形成其整體之 p刀以闡釋而非限制為基礎附加圖式,其中已描繪本 發明之標的。 【實施方式】 立即參考在圖中採用之編號來描述本發明之一實施例會 例。 貝 正如早些所描述之,當今家中通信的主要問題之—者是 達成用於多媒體應用的充足頻寬之連接因為由於家中之 輕射、距離及分佈之限制,WiFi應用不產生該等結果。在 本實化例實例中’冑出之該不知系統被用在家中以改良該 s 不三個不同裝置⑴、⑺及⑺。最前面的兩個使用 ^力線⑷作為傳輸媒體,而⑴僅使用空中媒體作為接收 二體。系統之每一者包括:一配備對應之調變器的發射器 )’-配備對應之解調變器的接收器⑹;一控 (二其控管發射器⑺與接收器⑷;連同搞合單元⑻:: 口早兀⑻加強電力線之不平衡效應, 中之該信號以及修改經由電力線注入之電力及即將= 129766.doc 200904036 之配電網輻射之電力的比例,其作用如同一輻射元件。此 輻射(在圖中被標記為(9))是一由注入至電力線(4)中之信號 所導致之有意輻射且它將能夠由可從空中媒體接收資訊之 «又備予以接收。為了使戎彳s號不干擾使用無線電通信頻率 的先前通信系統,系統以非授權使用之頻率頻段注入該信 號到電力線中。這些頻率是公開者並且不需要事先政府許 可以供發射射頻信號。 起作用之頻率(換句話說,用於以一傳導之方式經由該 電力線傳輸信號之頻率,以及輻射信號之頻率)係相同, 所以不需要用於頻率轉換或類似者之附加元件以准許介於 經連接到或未連接到該電力線的裝置之間之通信。 在圖1中,兩個裝置(1)及(2)注入其信號到電力線,儘管 使用該線具有之輻射屬性,但是兩個裝置(1)及(2)也輻射 該仏號這輪射之仏號可以由未直接連接到電力線但是有 一個射頻拾取系統之一裝置予以拾取,如同裝置(3)之情 况在這種情況下,收到之信號直接傳至解調變器(6),並 且控制模組(7)控管耦合單元(8)以封鎖輸出信號,致使來 自調變器(5)之信號皆未被耦合到輸出。 另一方面,圖2顯示相反之情況。在這種情況下,未連 接到電力線之裝置(3)發射—射頻信號(10),歸因於射頻信 號(1〇)被耦合到附近之電力配電網,致使裝置(1)及(2)有能 力拾取到射頻信號(10)。在這種情況下,#收到之信號係 直接取自電力線⑷並且控龍組⑺控f耦合單元(8)以使 其封鎖傳輪分支。 129766.doc 200904036 在圖3中描述另一項實施例,其中形成網路 裝置(11)(即使裝置不县眘触* 刀的一 Μ置⑴)不疋實體連接到電力線 為裝置(11)有能力與其他裝置進行資訊通信,所以:因 置⑴)在邏輯基礎上確實形成網路之部分 於裝 此類型裝置具有-共同解調變器(6)並且能利用=3。 電力分配線有意發射之不規則轄射,並以相同^豕中之 相同資料到達每個頻道然而以不同方式失真利用 甚至以低信號位準來達到正確之接收。 I ’以便 最後,圖4中代表另一實施例實 (12),裝置(12)含有:各 、中棱仏一裝置 土古 > 線,以用來接收以不同方六· /之^號’及—接至電力線(4)之額外連接,1允許此二 體接收到因網路特性而失真的相同信號,其中演算㈠Γ 被用在該解調變器(6)中右 、 °月匕 H 率地組合多個接收而恢復該 =攻種用來改良接收之信號之組合係已知 如同議〇(多輸人多輸出)技術之情況。在這種情況下, 控制模組(7)控管理耦合單 θ 一西“ ()致使未傳輸任何信號,但 :Γ::時’可能提供待選定之-具體耦合以供 其將影響該接收信號(沒有描述在圖中)。 提出之通信信號之所有這些實施例可存在於家中之相同 通#網路中。圖5代表—會 到雷W 、/ 其中裝置〇3)到⑼被連接 θ、 #到空f媒體或連接到該兩個媒體,而(22) 、广以豕中(房間或走廊)不同部分之參考。 雷::例子中,位於房間(23)中之該裝置(13)注入信號到 電力線並且實際配電網在該房間中輕射,其使得介於都位 129766.doc -10- 200904036 於邊房間(23)的裂置(13)與裝置(14)之間之通信可能。 隨著電力配電網經佈線穿過介於相(23)與房間(24)之 f之共同牆’所以配電網也將在該相(24)中輻射,其使 付"於裝置(13)與裝置(15)及(16)之間之通信可能。就其部 分而言,歸因於輻射元件,裝置(15)及⑽能藉由在空中 媒體中之射頻天線之發射及接收互相通信。 電力配電網亦經佈線穿過介於房間(23)與走廊(22)之間 之共同牆,所以配電網亦朝著該走廊輕射。在此,裝置 ⑼能接收由裝置(13)㈣穿過牆發射之通信並且後者能 使用射頻轉發訊息,其能被位於在走廊(22)與房間(Μ)之 間的牆甲之電力配電網所拾取。 藉由電力配電網拾取及輸送之信號由裝置⑽及(2〇)予 以接收並且由裝置(29)經由射頻予以接收。該等裝置(18) =〇)被放在房間(26)中以及該裝置(29)在房間(25)中但 是這兩個房間皆與走廊(22)毗連。 裝置(2 0)有兩個輻射元件以用來藉由通信頻道收集以不 同方式影響之資訊,並且相對於接收中可能之雜訊,藉由 不同之演算法有智慧地組合或處理資訊,以獲得最大信號 速率。如果對於此項技術而增加事實在於,由電力線之佈 線所輻射之信號取決於該線之點而不同,於是裝置(2〇)在 -位置令以使用利用已知頻道(諸如MIM〇(多輸入多輸出)) 的技術,以改良其之接收。在該實例中,通信頻道具有多 個輸入(在電力線之所有點處的輻射不相等)及多個輸出 於安裝在裝置中之天線數目,在這種情況下,兩個天 I29766.doc 200904036 線)〇 -=其Γ分’位於相(27)中之裝置(21)經由電力線及 個=件而利用其雙重連接,收被發送之資訊之兩 固版本並且它允許藉由演算法予 4a „ ,貝异法從兩個來 4取以充分無相關方式未因頻道之雜訊 改變的Λ及衣減而 【圖式簡單說明】 圖1代表具有在電力線上傳輸之 ^ Φ ^ 置及—单獨使用 中媒體作為接收之第三裝置之實施例實例。 圖2顯示與先前圖之相反之例子, 丹甲得輸疋經由空中 媒體且接收是經由電力線。 圖3代表具有多個天線之裝置之例子。 圖4顯示具有各種天線及一 實例。 丧主電力線之連接之裝置之 圖5代表一實子,其中通信系統能被用在家中,組 些被描述之不同裝置。 口 【主要元件符號說明】 1 2 3 4 5 6 7 裝置 裝置 裝置 電力線 發射器 接收器 控制模組 129766.doc 12. 200904036 8 耦合單元 9 輻射 10 射頻信號 11 裝置 12 裝置 13 裝置 14 裝置 15 裝置 16 裝置 17 裝置 18 裝置 20 裝置 21 裝置 22 走廊 23 房間 24 房間 25 房間 26 房間 27 房間 29 裝置 129766.doc -13SUMMARY OF THE INVENTION To achieve this goal and to avoid the disadvantages described in the [Prior Art], the present invention consists of a communication system that does not know a transmission medium, and includes at least one receiver and a transmitter connected to a single interface. The interface is for injecting a communication signal to a power line; wherein the injection interface for the signal is provided with a module for distributing the energy of the communication signal via the power line and via the air medium that is fired by the power line . The module for power distribution includes a component that enhances the unbalance effect of the power line to increase the portion of the signal in the common mode that produces electromagnetic radiation that begins with the transmitted signal. Furthermore, the component that enhances the imbalance effect of the power line, in turn, provides a means for varying the likelihood of changing the ratio between conduction and radiant energy, which performs an adjustment between the two ratios. From the point of view of reception, the receiver forming the communication system is provided with a receiving module for signals passing through the power line, a receiving module equipped for transmitting signals via the air medium, or equipped with the two modules. 129766.doc 200904036 Similarly, from the perspective of the transmission, and due to the possibility of providing a ratio between conduction and radiant energy, the present invention provides for the passage of power lines, left-to-two media, or via the two The possibility of a signal transmitted by the media. ~ Month 匕 Finally, the communication system may also contain means for forwarding the received signals to extend the coverage of the communication system. In the following, in order to facilitate a better understanding of the specification and the invention in its entirety, the drawings are to be construed as illustrative and not limiting. [Embodiment] An example of an embodiment of the present invention will be described with reference to the numbers used in the drawings. As described earlier, the main problem with communication at home today is to achieve a sufficient bandwidth connection for multimedia applications because WiFi applications do not produce such results due to limitations in light, distance and distribution in the home. In the example of this embodiment, the unknown system is used at home to improve the s without three different devices (1), (7) and (7). The first two use the force line (4) as the transmission medium, and (1) only use the air medium as the receiving two body. Each of the systems includes: a transmitter equipped with a corresponding modulator) '- a receiver (6) equipped with a corresponding demodulator; a control (two control transmitters (7) and a receiver (4); Unit (8):: mouth early (8) to strengthen the imbalance effect of the power line, the signal and modify the proportion of the power injected through the power line and the power of the distribution network radiating = 129766.doc 200904036, the role of the same radiating element. Radiation (labeled (9) in the figure) is an intentional radiation caused by a signal injected into the power line (4) and it will be able to be received by the information that can be received from the airborne media. The 彳s number does not interfere with previous communication systems that use radio communication frequencies, and the system injects the signal into the power line in a frequency band that is not authorized for use. These frequencies are public and do not require prior government approval for transmitting RF signals. (In other words, the frequency used to transmit signals via the power line in a conducting manner, and the frequency of the radiated signal) are the same, so no need for frequency Conversion or similar add-on to permit communication between devices connected to or not connected to the power line. In Figure 1, two devices (1) and (2) inject their signals into the power line, albeit using The line has the radiating properties, but the two devices (1) and (2) also radiate the nickname. The nickname of the round can be picked up by a device that is not directly connected to the power line but has an RF pick-up system, like a device. (3) In this case, the received signal is directly transmitted to the demodulator (6), and the control module (7) controls the coupling unit (8) to block the output signal, resulting in the modulator. (5) The signals are not coupled to the output. On the other hand, Figure 2 shows the opposite case. In this case, the device (3) that is not connected to the power line emits - the RF signal (10), due to the RF The signal (1〇) is coupled to the nearby power distribution network, causing the devices (1) and (2) to pick up the RF signal (10). In this case, the signal received by # is taken directly from the power line (4) And the control group (7) controls the f-coupling unit (8) to Locking the wheel branch. 129766.doc 200904036 Another embodiment is described in Figure 3, in which the network device (11) is formed (even if the device is not sensitive to a device (1)), the physical connection to the power line is The device (11) has the ability to communicate information with other devices, so that the portion of the network that does form a logical basis on the logical basis is that the device of this type has a co-demodulation transformer (6) and can utilize =3. The power distribution line intentionally transmits irregular irregularities and arrives at each channel with the same data in the same channel. However, it is distorted in different ways to achieve correct reception even with low signal levels. In order to finally, in Fig. 4, another embodiment (12) is shown. The device (12) contains: a medium, a central device, and a line for receiving the different squares. 'And - an additional connection to the power line (4), 1 allows the two to receive the same signal that is distorted by the characteristics of the network, where the calculation (1) is used in the demodulation (6) right, ° 匕Combining multiple receptions with H rate and recovering the combination of signals used to improve reception is known as the negotiation (multiple input and multiple output) technology. In this case, the control module (7) controls the coupling of a single θ-West "() so that no signal is transmitted, but: Γ:: may provide a specific coupling to be selected for it to affect the reception Signals (not depicted in the figure). All of these embodiments of the proposed communication signal may exist in the same network in the home. Figure 5 represents - will go to Ray W, / where devices 〇 3) to (9) are connected θ , # to empty f media or connect to the two media, and (22), wide reference to different parts of the room (room or corridor). Ray:: In the example, the device located in the room (23) (13 Injecting a signal into the power line and the actual distribution network is lightly ignited in the room, which causes communication between the split (13) of the side room (23) and the device (14) between the 129766.doc -10- 200904036 Possible. As the power distribution network is routed through the common wall between the phase (23) and the room (24), the distribution network will also radiate in the phase (24), which will pay for the device ( 13) communication with devices (15) and (16), in part, due to radiating elements, The (15) and (10) can communicate with each other by transmitting and receiving the RF antennas in the air medium. The power distribution network is also routed through a common wall between the room (23) and the corridor (22), so the power distribution The net is also lightly directed towards the corridor. Here, the device (9) can receive the communication transmitted by the device (13) (4) through the wall and the latter can use the radio frequency to forward the message, which can be located in the corridor (22) and the room (Μ) The power distribution network between the wall armor is picked up. The signals picked up and transported by the power distribution network are received by the devices (10) and (2) and received by the device (29) via the radio frequency. (18) =装置) is placed in the room (26) and the device (29) is in the room (25) but both rooms are adjacent to the corridor (22). The device (20) has two radiating elements for The communication channel collects information that is affected in different ways, and intelligently combines or processes the information by different algorithms to obtain the maximum signal rate relative to the possible noise in the reception. If the technology is added, the fact is that Power line wiring The signal of the shot differs depending on the point of the line, so the device (2〇) is in-position to use a technique that utilizes a known channel, such as MIM〇 (Multiple Input Multiple Output), to improve its reception. In the example, the communication channel has multiple inputs (irradiation at all points of the power line are not equal) and multiple outputs to the number of antennas installed in the device, in this case two days I29766.doc 200904036 line) -=The device (21) in the phase (27) is double-connected via the power line and the device, and the two versions of the transmitted information are received and allowed to be 4a by the algorithm. The different method is taken from two to four in a sufficiently uncorrelated manner, and the noise of the channel is not changed. [Figure is a simple description] Figure 1 represents the transmission of the power line and the use of Φ ^ The medium media is an example of an embodiment of the third device received. Figure 2 shows an example of the opposite of the previous figure, where Daniel is transmitted via the air and received via the power line. Figure 3 represents an example of a device having multiple antennas. Figure 4 shows a variety of antennas and an example. Figure 5 is a diagram of a device in which the main power line is connected, wherein the communication system can be used at home to assemble different devices as described. Port [Main component symbol description] 1 2 3 4 5 6 7 Device device device Power line transmitter receiver control module 129766.doc 12. 200904036 8 Coupling unit 9 Radiation 10 RF signal 11 Device 12 Device 13 Device 14 Device 15 Device 16 Device 17 Device 18 Device 20 Device 21 Device 22 Corridor 23 Room 24 Room 25 Room 26 Room 27 Room 29 Device 129766.doc -13

Claims (1)

200904036 十、申請專利範面: 】.一種包括若干通信裝置之不知傳輸媒體之通信系統,其 包1 2 .至少一發射器,其具有一單一介面以用於注入^ 6 “號到電力線;及至少一接收器; 其特徵為,用於該信號之該注入介面包含—模組,用 於經由該電力線及經由藉由該電力線輻射之空拔 . 「郑體兩 者分配該通信信號之能量。 2·根據請求項丨之不知傳輸媒體之通信系統,其特徵為 以分配能量之該模組包含:加強該電力線之各不平衡2 應之構件,以增加在一共同模式中的該信號之部分,其 產生開始於由該電力線傳導之信號之電磁輻射,並且實 =在注人點中之傳導能量之比例及輻射能量之比例之二 129766.doc 1 根據請求項〗之不知傳輸媒體之通信系統,其特徵為該 至/接收15包括選自一用以經由該電力線傳導信規之 接收器、一用以經由該空中媒體輻射信號之接收器、及 該二者的組合之一接收器。 2 根據5月求項2之不知傳輸媒體之通信系統,其特徵為改 變該傳導及輻射能量之間的比例之該加強構件經由選自 4電力線、該空中媒體及該二者的組合之一媒體來傳輸 云亥"ί吕號。 才據叫求項1之不知傳輸媒體之通信系統,其特徵為其 匕括對接收化號之若干轉發器裝置,以擴展該通信系統 之覆蓋範圍。 ^、、’200904036 X. Patent application: 】 A communication system comprising a plurality of communication devices without a transmission medium, comprising: 12. At least one transmitter having a single interface for injecting a signal into the power line; At least one receiver; wherein the injection interface for the signal comprises a module for transmitting air through the power line and via the power line radiation. "The two bodies distribute the energy of the communication signal. 2. A communication system unaware of a transmission medium according to the request, characterized in that the module for allocating energy comprises: means for enhancing each imbalance of the power line to increase a portion of the signal in a common mode , which generates electromagnetic radiation starting from the signal transmitted by the power line, and the ratio of the conduction energy in the injection point and the ratio of the radiant energy. 129766.doc 1 Communication system of the transmission medium unknown according to the request item , characterized in that the to/receive 15 comprises a receiver selected from a source for transmitting a signal via the power line, and a signal for radiating a signal via the air medium. Receiver, and a receiver of the combination of the two. 2 According to the communication system of the transmission medium of May 2, characterized in that the reinforcing member that changes the ratio between the conduction and the radiant energy is selected from 4 The power line, the air medium, and a combination of the two media are used to transmit Yunhai"ί吕. It is said that the communication system of the transmission medium is not known as the transmission number of the transmission medium. A repeater device to extend the coverage of the communication system. ^,, '
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