ES2226571B2 - BIDIRECTIONAL WIRELESS BAND WIRELESS COMMUNICATIONS SYSTEMS INTEGRATED IN DATAGRAMAS NETWORKS. - Google Patents

Abstract

Two-way broadband wireless communications system integrated in datagram networks. Two-way, wireless, reconfigurable communications system, integrated into a datagram network. The presented system is characterized by the integration of a wireless network and a datagram network. Among its capabilities are the reconfiguration capacity, which means that it is possible to adapt it to various types of modulations, powers, in short, to various communications services. The system also has the ability to be bidirectional, which makes possible the traffic of information of different nature to and from different points of the network. To perform these functions, the system makes use of a network of reconfigurable wireless devices, with transmission and reception capabilities, which are connected to a network of datagrams (for example the Internet) that serves as a transport and control network. This connection between both networks is carried out through the use of interfaces.

Description

Wireless communications system Bidirectional broadband integrated in datagram networks.

Technical sector to which the invention relates

This invention falls within the scope of the Communications, systems and services electronics industry telecommunication, both civil and defense. More in concrete this invention solves technical problems within the multimedia broadcast markets, mobile communications, systems  Smart, government and military transport.

Statement of prior art

Among the main needs of society current is the extension and interconnection of the different and heterogeneous communications services in a way that allows a widespread use and access of the entire population, even in environments rural or difficult to access. When it comes to guaranteeing access to communications services, given the extreme dynamism of this environment, it is necessary to provide for the use of systems capable of adapting both to existing services in today as services that have not yet been implemented or, They simply do not exist.

In order to guarantee access to these services of communications, it is necessary to start from a realistic scenario that minimize the cost of deployment and maintenance of these services and that is able to adapt to the different services implemented and for implementing with the realization of the minimum modifications of so that its exploitation remains viable.

The importance of networks in the development of the Information Society. In fact, the universalization of communications services produced in the 90s has been sustained in a direct way in this concept. Mobile telephony, information services on the Internet, World Wide Web, electronic payment systems, radio and broadcasting on demand, electronic commerce and banking and a long etc., they owe their massive extension to the exploitation of the network concept.

The short and medium term perspective is that this trend continues to boom. However, there is no doubt that today largely wastes much of its potential, simply due to the fact of the lack of joint integration of the same. Despite some integration attempts [1, 2, 3, 4, 5], many of these networks are still operating more or less independent, and more importantly, they have only occurred partial integrations, which lack, fundamentally of the capacity for reconfiguration and, therefore, adaptation to changes in the service needs so frequent in the world of Current communications

The synergistic union of the concepts in which it support is therefore key to achieve universal access to existing communications services and for the provision of new ones maybe unthinkable just a few years ago. He system described seeks to exploit the potential of datagram networks (especially the Internet) and their imminent extension to broadband services, to transport information, communicate with each other and control wireless networks reconfigurable.

From the economic point of view, given the key importance of the network concept for the constitution of any modern communications service, if it is intended that that service is of massive and widespread use, as has already been commented previously, it is necessary that its cost be the most as low as possible

Several facts have boosted the Internet boom In recent years, it should be noted: the recent appearance of new more powerful processors and systems improvement operational, designed for networking and moderate cost. During the past decades network operation, basically was entrusted to machines that used operating systems specially designed for operation in network environments such as UNIX, which ran in complex and bulky machines. However in the 90s, operating systems designed to personal computers, such as Microsoft Windows, since its version third, or Linux, have allowed network communications through The use of personal computers. This fact has simplified notably massive network access through the use of simple machines, such as the personal computer as well as the introduction of new software, in some cases of distribution free, for access to datagram networks since also some computer companies with a strong influence on the market have developed simple tools to facilitate access to Various network applications. Of special relevance to the presented system is the recent development of systems of Internet broadcasting, based on data distribution systems streaming "[5, 6, 7, 8]. These new computer applications allow the diffusion of multimedia, video and sound services by Internet, expecting a tremendous boom in these technologies with the already imminent irruption in the market of access consumption in broadband.

In spite of everything, still at the present time the Internet use is closely related to the simple communication between computers In addition, generally access to the it is done through supports on physical media (cable, fiber optic, etc.), an issue that limits its use in certain applications due to the high cost of implementation of a network of these characteristics in difficult environments such as rural environment, interior of tunnels and buildings, transport collective, etc.

Moreover, the tremendous expansion experienced by wireless systems and networks during the decade of the 90, expansion that continues its course, has led to great advance in the integration, miniaturization and the reduction of technologies (especially electronic) related to wireless equipment, to the point of making it fully affordable technologies that only a few years ago were considered reserved for applications in the military or space field, so high cost, such as microwave technology and millimeter waves [9, 10]. This makes it possible that, today, it is possible to integrate wireless systems of great versatility, great bandwidth, reconfigurable and therefore able to support different services and forms of access, with a very low cost and a moderate complexity

Explanation of the invention.

The present invention is intended to resolve the technical problem consisting of the integration of a network wireless with reconfiguration capability and therefore adaptation to various services, in a network of datagrams, which serves as a transport and control network, this means that it allows the information to be transmitted is directed to and from the network wireless In this way the problem of the provision is solved of services through a wireless network, of diverse nature, in, to and from various locations.

Regarding the distribution capacity of the information through this system there are several possibilities described below:

- Information received through the wireless network and transmitted again by the same network : Communications signals received by the receiving circuits from the antennas of the wireless network are processed and redirected through the datagram network back to another point (or the same) of the network, where it is transmitted again through the transmitting circuits of the wireless network.

- Information received through the datagram network and transmitted by the wireless network : The communication signals are generated at one point of the datagram network, addressed to another point / points thereof and transmitted at said point / points by the wireless network whose transmission characteristics (frequency, power, radiation pattern, modulation, etc.) are configured.

- Information received through the wireless network and transmitted by the datagram network : Communications signals are obtained at one or several points of the wireless network whose reception characteristics (frequency, radiation pattern, modulation, etc.) are configured . These signals are subsequently addressed to a point / points in the datagram network.

- Information received through the datagram network and transmitted by the datagram network : Communications signals are obtained at one or more points in the datagram network, processed if necessary, and then addressed to a point / points of the datagram. datagram network

The principle of operation of the system is shown in figure 1. In this figure they are identified by numbers circled each of the subsystems that make up. With the number (1) the servers are identified. He number (2) refers to the datagram network itself, that in the preferred embodiment of the invention is the Internet. With the number (3) network clients and interfaces between the Datagram network and wireless broadcast network. The number of these subsystems, connected to the server through the network (2) it can vary from just 1 to a number as high as precise, as shown in the same figure, allowing, by both a multipoint point communication and chain connection of All customers Finally, the number (4) designates radio frequency transceivers. The functions they perform Each of these subsystems are shown below:

(1) Network server

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It serves from the input port to the communications signals to be transmitted through the net. If its nature is analog, it is sampled, quantified and, if necessary, subsequent compression.

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It serves from input port to control signals for transceivers  connected to network clients (frequency, power, etc.).

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Performs network interface functions packet-based through unicast or multicast service through transmit / receive control protocols (TCP) or user datagram protocols (UDP) for the transmission of signals described in the previous sections to the rest of the network elements.

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It serves from the output port to the communications signals received from the net. If its nature is analog, it proceeds to its reconstruction, if It is necessary, after decompression.

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It serves from output port to status signals and alarms (temperature, reflected, PLL release, etc.) received from transceivers connected to network clients.

(2) Datagram network

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Represents the network on which it performs the transmission of packets containing the information processed by the system.

(3) Client / Network Interface

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Performs network interface functions packet-based through unicast or multicast service through transmission control protocols (TCP) or protocols User datagram (UDP) for the transmission / reception of network signals

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It serves from the output port to the communications signals received from the network to transceivers. If its nature is analog, it proceeds to its reconstruction, if necessary, prior decompression.

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It serves from output port to transceiver control signals (power, frequency, etc.) received from servers connected to the datagram network.

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It serves from the input port to the communications signals to be transmitted by the network of datagrams from the transceivers. If your nature is analog, it is sampled, quantified and, if It is necessary, later compression.

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It serves from the input port to the status signals coming from the transceivers (ROE, temperature, etc.).

(4) Radio frequency transceiver

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The radio frequency transceivers, are physically located connected to clients / network interfaces. Perform the functions Physical transmission and reception of radio signals of the wireless network. Although they are connected to the client network, are controlled from the server and it is this one who They direct their alarm and status signals.

Description of the figures included

Figure 1 shows a block diagram of the system. This figure shows the main elements members: identified server / client group with the number (1), group of interfaces identified with the number (3) and a group of transmitters / receivers (include systems radiants) identified with the number (4). All these devices are communicated and connected through the datagram network also shown in figure 1 with the number (2). The datagram network serves as a link between the different elements of the system.

Figure 2 shows a block diagram of a of the preferred embodiments for carrying out the invention. In this diagram, by numbers, the blocks are indicated Functional of the realization.

(1) Clients and servers : The servers perform the functions of introducing, compressing, decompressing, extracting and storing the information that circulates through the system. They also perform functions of control and supervision of the equipment and the network itself. Customers perform functions of introduction, compression, decompression, extraction and storage of the information circulating through the system.

(3) Network interfaces: The network interfaces allow the connection between the datagram network and the wireless network, executing the necessary network functions, controlling the information flow between the datagram and wireless network and ensuring the compatibility of the signals Between both networks.

(4) Transmission and reception circuits: The transmission and reception circuits perform the physical functions of adapting the communications signals to the radio frequency channel, sending the signals to be transmitted to the radiating system (5) and processing the signals received from it.

(5) Radiant system: The radiant system is intended to convert electrical signals from the transmission and reception circuits (4) into electromagnetic waves and vice versa.

Figure 3 shows a block diagram of the client / network interface. This subsystem is constituted by the following blocks that in the figure are designated by a number enclosed in a circle:

(5) Information input port . Shows the flow of incoming information to the client / interface from the radio frequency transceiver.

(14) Control and status input and output port . It shows the flow of the control and status signals to and from the radio frequency transceiver.

(15) Information output . Displays the outgoing information flow of the client / interface from the radio frequency transceiver.

(6) Acquisition of information . It represents the client's input port on which the information to be transmitted is entered. If the nature of the information is analog this block performs the functions of sampling and quantification of this.

(7) Coding . Performs the coding and compression operations (if applicable) of the information of the signal routed to or from the network.

(8) Broadcast packets, streaming . The signal encoded in the previous block is processed for sending in the form of packets using appropriate network transmission protocols.

(9) Network interface . It is responsible for performing the functions of adapting the signals to the datagram network, including the functions of physical adaptation to the transmission medium.

(10) Transmission / reception of orders / data / alarms . It is responsible for adapting the data and alarm signals from the transmitters to the servers, as well as receiving the orders and data from the server to the transceiver. All these functions are performed based on a network transmission protocol.

(11) Receipt of packages . This block is responsible for receiving and ordering the packets containing the compressed program signal, coming from the multimedia server through the network.

(12) Decoding . This stage performs dual functions to those performed by stage (7). It is responsible for processing and decompressing (if applicable) the signal received from the server so that it can be broadcast by the transceiver.

(13) Information output . Represents the client's output port / interface. If the nature of the information is analog, this block performs its reconstruction functions.

Figure 4 shows a block diagram of the receiver transmitter It consists of the following blocks that in the figure are designated by a number enclosed in a circle:

(16) Vector modulator : Generates the radio frequency signal to be transmitted from a local oscillator and from the modulating signals delivered by the network interface (4).

(18) Power amplifier : Raises the level of the modulated radio frequency signal to a level suitable for being radiated by the system to be sent to the radiant system (5).

(5) Reconfigurable radiant system . Radiant system that by means of the use of several elements whose feeding phase is controlled by the control signals received by the network client allows to orientate the transmission beam, reception in a certain direction. This device also includes a duplexer to separate the transmitted signal from the received one.

(19) Low noise amplifier : Raises the level of the radio frequency signal captured by the reconfigurable radiant system to a level suitable for further processing by the vector demodulator (17).

(5) Vector demodulator : Extracts the received modulated signal and delivers it to the network interface (4).

Detailed statement of at least one embodiment of the invention

One of the preferred embodiments to perform the system described is the one shown in figure 2. In this Figure shows the basic functional blocks of the system, designated by numbers enclosed in circles, although according to  particular needs may have some more, or those that shows may be distributed in another way more appropriate to Each specific case. Next we proceed to describe the blocks shown in figure 2.

(1) Clients and servers : The clients and servers of the network are preferably constituted by computers, managed by an operating system and with the capacity to connect in a network through a type of communications protocol, preferably TCP / IP, although it could be other different.

The main functions of the servers They are:

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Entering various information nature (analog, digital) from outside the network, performing, if necessary, sampling, compression functions, level adaptation, etc.

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Various information extraction nature (analog, digital) from inside the network, performing if necessary, digital conversion functions to analog, decompression, level adaptation, etc.

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Information storage coming from inside or outside the network.

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Control functions over others devices connected to the network.

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Supervisory functions of operation of the network itself.

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Perform any other function of service to the rest of the members of the network.

Among the main functions of customers Network are:

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Entering various information nature (analog, digital) from outside the network, performing if necessary sampling functions and compression.

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Extracting information to the network of diverse nature (analog, digital) coming from inside the network, performing decompression functions if necessary and digital to analog conversion.

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Information storage coming from inside or outside the network.

(3) Network interfaces: The network interfaces allow the connection between the datagram network and the wireless network. The functions to be performed by the interfaces are the following:

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Execute all network functions necessary for its operation within the datagram network (for example, execution of TCP / IP protocols)

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Extract the information coming from the datagram network with address to the wireless network, performing, if necessary decompression and conversion functions digital / analog This information also includes signs of Communications, control signals.

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Adapt and process the signals from the datagram network (information and control) to that are compatible with those required by the network circuits wireless (4) and radiant system (5).

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Receive the signals coming from the wireless network (information and control) through circuits thereof (4) and radiant system (5).

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Make your transmission through the datagram network, performing if necessary sampling functions and compression.

(4) Transmission and reception circuits: The transmission and reception circuits are intended to:

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Prepare the signals coming from the datagram network (2) conveniently processed and adapted by the network interfaces (3) for transmission through a channel radio frequency by using the radiant system (5).

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Extract the information coming from the wireless network captured by the radiant system (5) and transfer it to the network interfaces (3) for processing and subsequent transmission through the datagram network (2).

Within the preferred embodiment of the invention these circuits would be essentially constituted by the following elements:

Transmitter : I / Q vector modulator that allows the implementation of various modulations in a reconfigurable way, up-converter to transfer the modulated signal to the desired radio transmission channel, power amplifiers to obtain the desired level of signal in said channel, the filters necessary for signal processing.

Receiver : Low noise amplifiers to raise the level of the received signal, down converters to transfer the received signal from its original reception channel to the working frequency of the demodulator, I / Q vector demodulator to extract the Modulated communications signal.

(5) Radiant system . The radiant system is intended to convert electrical signals into electromagnetic waves and vice versa.

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In the preferred embodiment of the invention this radiating system is constituted by a set of radiant elements whose phase and / or amplitude can be controlled so that its radiation diagram be controllable by the system.

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It also includes a duplexer to separate the transmission and reception subsystems within the block of circuits (4).

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Bibliography

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Telecommunications Conference, 2001 . GLOBECOM '01. IEEE, Volume: 3, 2001 pp: 1759-1765 vol. 3.

[3] P. Asenstofer , JB Scholz , "Long Fish, a HF Radio Network Testbed", Seventh International Conference on, HF Radio Systems and Techniques (Conf. Publ. No. 441), 7-10 Jul 1997 pp: 198- 200.

[4] United States Patent US2002159476, Moon et to the. October 10, 2002 . Method and system for providing data communication with a mobile station.

[5] United States Patent 6,418,138 Cerf, et al . July 9, 2002 . Internet radio communication system.

[6] O. Hodson , S. Varakliotis , V. Hardman , "A Software Platform for Multiway Audio Distribution over the Internet", Audio and Music Technology: The Challenge of Creative DSP (Ref. No. 1998/470), IEE Colloquium on, 18 Nov 1998 , pp: 4 / 1-4 / 6.

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superpose for an electronic infrastructure.

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Claims (7)

1. A broadband communications system, bidirectional, wireless, reconfigurable, adaptable, integrated into datagram networks, which allows using wireless transmitters Reconfigurable, the transmission and reception of form signals wireless, with origin or destination in one or more elements of a network of datagrams, or in one or more of said transmitters reconfigurable wireless, comprising:

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A set of transceivers (transmitters and receivers) reconfigurable wireless, in which it is possible to modify Different operating parameters: modulation, demodulation, transmission and reception frequency, power and diagrams of radiation of their radiating systems,

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a set of network servers on which the information to be transmitted by the transmitting stages of the Wireless reconfigurable transceivers and control signals for them and who also receive information and signals from state that wireless transceivers direct to them reconfigurable, through a network of datagrams and that they find physically connected to the transceivers reconfigurable wireless,

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a set of network clients that are physically connected to the reconfigurable wireless transceivers from those receiving the information sent by the network servers to said transceivers, serving as an interface, and that also send the information captured by the receptor stages of the transceivers reconfigurable wireless to other clients or servers of the system through a datagram network, and

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a datagram network that connects the servers and clients mentioned previously.

2. The communication system according to claim one characterized in that its wireless reconfigurable transceivers have the following stages, which give them their reconfiguration capacity:

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a vector modulator (I / Q) to configure your system modulation,

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a vector demodulator (I / Q) to configure your system demodulation and

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a set of radiant elements controlled in amplitude and phase for Configure the radiation pattern of your radiant system.

3. The communication system according to the preceding claims characterized in that the signals that are injected into the vector modulators of their wireless reconfigurable transceivers to be transmitted and the control signals for the configuration of the modulation operation and transmission frequency of their transmitting stages and the demodulation operation and reception frequency of its receiving stages, are obtained from a network client, which in turn receives said data and orders, from another network client or a network server to which it is connected through of a datagram network. 4. The communication system according to the preceding claims characterized in that the signals received and demodulated by the vector demodulators of their wireless reconfigurable transceivers and their alarm signals are channeled to a client of a datagram network, to which they are physically connected, which in turn it sends them to another client of said network or a server to which it is connected through a network of
datagrams 5. The communication system according to the preceding claims characterized in that the radiant system (antenna) by which the wireless reconfigurable transceivers transmit and receive radio signals is also reconfigurable, and for this it is composed of a set of radiating elements from which it can control its phase and amplitude, the necessary signals coming from the control of said parameters of a client of a datagram network, which in turn obtains said data from a server of said network. 6. The communication system according to the preceding claims characterized in that its network servers have the following steps:

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port of communications signal input whereby the signals of communications can be introduced to the system,

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sampling and quantified with compression (if applicable) of the communications signals introduced to your entry,

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port of input of control signals directed to the control of the stages transmitters and receivers and the radiant system of wireless reconfigurable transceivers that make up the system of communications,

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port output of data signals from transmitters reconfigurable wireless, which proceeds to rebuild the same if its nature is analog, by which the communications signals circulating in the system,

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port of output of status and alarm signals from the reconfigurable wireless transmitters and

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packet network interface via Unicast or multicast service over TCP and / or protocols UDP.

7. The communication system according to the preceding claims characterized in that its network clients have the following steps:

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port input for communications signals obtained via radio by the receiving stages of wireless transceivers reconfigurable and intended for network servers or others system reconfigurable wireless transceivers,

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port of input of status signals and alarms from the stages Corresponding wireless transceivers reconfigurable,

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a data acquisition subsystem that performs sampling and quantification of the input signal if this is analog,

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a coding stage that performs the coding functions and compression (if applicable) of signals already acquired in mode digital,

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a packet broadcasting subsystem (streaming) that processes the signal encoded in the encoder subsystem for shipment in the form of packets over a datagram network through service unicast or multicast,

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a stage of transmission and reception of data orders and alarms that is  connected to the reconfigurable wireless transmitter to which it sends the data and control signals that you need, from the network server, and from which it receives the data and alarm signals to your shipment to the network server,

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a network interface for the physical adaptation of the client to the medium of transmission on which the network is implemented datagrams,

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a packet receiving stage that receives and orders the packages received from the network server,

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a decoding stage that decompresses (if applicable) and processes the data streams from a network server or other client of the net,

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port output of the communications signals coming from the network servers or other wireless transceivers reconfigurable for the transmitting stages of a reconfigurable wireless transceiver,

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port output of control signals from servers network to wireless transceivers reconfigurable.