WO2010070459A1 - Système et procédé d'exploitation d'un dispositif de relais - Google Patents

Système et procédé d'exploitation d'un dispositif de relais Download PDF

Info

Publication number
WO2010070459A1
WO2010070459A1 PCT/IB2009/051920 IB2009051920W WO2010070459A1 WO 2010070459 A1 WO2010070459 A1 WO 2010070459A1 IB 2009051920 W IB2009051920 W IB 2009051920W WO 2010070459 A1 WO2010070459 A1 WO 2010070459A1
Authority
WO
WIPO (PCT)
Prior art keywords
relay device
message
radio
certain message
relaying
Prior art date
Application number
PCT/IB2009/051920
Other languages
English (en)
Inventor
Tal Mashraky
Original Assignee
Acceleradio Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Acceleradio Ltd. filed Critical Acceleradio Ltd.
Publication of WO2010070459A1 publication Critical patent/WO2010070459A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations

Definitions

  • the invention is in the field of radio communication networks.
  • the disclosed invention deals with a relay device for relaying messages between radio transceivers having no connection due to distance or an obstacle.
  • Armies use tactical radio voice communication networks to have command and control in the hierarchy structure of the army combat units. Each level in the army hierarchy has its own dedicated radio networks that enable campaign control and communication between mobile troops.
  • the tactical radio communications uses several frequency ranges, VHF(very high frequency) range for the main tactical systems, HF(high frequency) range also used for tactical systems at very long distances, and UHF(ultra high frequency) range to communicate ground troops with airborne means.
  • Radio voice communication systems were modernized and improved along the years, giving users better mobility with smaller and more convenient radio devices for infantry. They also get longer communication ranges due to higher transmission power and better reception sensitivity.
  • Modern tactical radio systems also enable encrypted transmission as well as frequency hopping to prevent hostile listening and jamming. Yet, a limited communication range is the main problem of tactical communication. Hilly topography, heavily built terrain and long distances limit radio communication ranges and make the command and control harder or impossible in a variety of geographical circumstances as radio devices approach their maximum range.
  • the common means to overcome range and screening limitations are a mediation station, an automatic relay stations and a radio keying system.
  • the mediation station is a radio mobile station disposed in a place that controls and covers the desired territory by infantry or a vehicle,.
  • the mediation radio system assists communication between troops having no direct communication, by receiving messages from one side and retransmitting them to the other side using the same frequency channel. That task necessitates an experienced radio operator of high skills.
  • the automatic relay device hereafter F1-F2 auto relay
  • a special frequency is allocated to the automatic relay device, and an auto-relay operation is enabled by locating the relay station in a place that covers the whole desired territory, and by connecting it to two radio transceivers, one transceiver at Fl and the second transceiver at F2.
  • an automatic retransmission of voice information from the Fl to F2 is enabled with no manned mediator involvement.
  • a radio keying system combines tactical radio transceivers with radio-telephone links to get better range of radio control. That system is used mainly in regional headquarters rather than in the field combat units.
  • Mediation and relay stations have many limitations and deficiencies as follows: 1. An experienced radio operator, skilled and trained for becoming a professional authority and efficient in working with senior officers is desired for operating a manned mediation station. As such trained operators may not be available, the operation of a mediation station suffers lots of mistakes and breakdowns in communication out of misunderstandings and wrong/mistaken message transferring.
  • a dedicated frequency channel which is not shared with any other network, should be allocated for the relay trunk.
  • the VHF frequency range is rather limited and several users have to share the same frequency.
  • allocating a dedicated frequency channel to the exclusive use of the F1-F2 radio relay may not be possible, their use remains rather limited.
  • the existing relay devices have no self intelligence, thus in many cases they become a disturbance and obstacle. For example, the allocation of the relay device frequency channel is pre-set and may not be changed at ease. Such limitations are in contrast with a principle of "openness” and “flexibility” of radio systems. Also, the existing technology lacks any remote control capability and any change necessitates the presence of an appropriate operator to execute the desired change. 4.
  • Relay trunks attract hostile electronic warfare (EW) troops, which may use the relay station itself to distribute and broadcast the hostile EW signals or noise. 5.
  • Current relay stations are too big to be carried by a walking infantry, mini remote- piloted vehicle (MRVP), unmanned aerial vehicle (UAV), etc, and need a vehicle or an airplane. 6.
  • the existing relay systems are big and expensive, and thus their use may not be compatible with the needs.
  • a relay device for relaying messages between radio transceivers in a radio network, which includes ports and a processor.
  • the ports are configured for receiving input and for providing the received input for further processing.
  • the received input includes an audio signal from the transceivers, an interfering radio input item, and a stream of digital data.
  • the processor is configured for getting a certain message associated with the received input, for obtaining parameters associated with the certain message, and for performing actions on the certain message in accordance with the obtained parameters.
  • the relayed messages are audio messages, data messages and data over audio messages.
  • the device includes a speech recognition module, configured for analyzing the certain message.
  • the ports include an analog to digital conversion unit and/or a digital to analog conversion unit.
  • the device includes a memory adapted for storing a plurality of speech items.
  • the certain message may be compared to the plurality of speech items for matching, and the performed actions on the certain message may be done in accordance with that matching.
  • the device includes a buffer adapted for storing messages.
  • a stored message may be relayed several times to the transceivers.
  • the relay device has two handset ports for linking the relay device to operator handsets.
  • the relay device may provide protection or alarm in case that two operators communicate simultaneously with different radio transceivers at a different security level.
  • the method includes receiving radio input, obtaining parameters associated with a certain message related to the received input, and performing actions of on the certain message in accordance with the obtained parameters.
  • the received radio input may include an audio signal from a radio transceiver, an interfering radio input item, and a stream of digital data.
  • the actions performed on the message arc taken of a plurality of performable actions which includes relaying a message to a radio transceiver.
  • the method includes the steps of recognizing speech items within a message, and relaying the certain message to a radio transceiver in accordance with the recognized speech items.
  • the method includes remote controlling the relay device by submission speech items to it.
  • the plurality of performable actions includes actions to deal with a noisy message which is related to both an interfering radio input and a signal from a radio transceiver.
  • the interfering radio input is reduced to get a relatively clean message, relative to the noisy message.
  • the clean message is relayed to a radio transceiver.
  • the plurality of performable actions includes relaying a message related to an audio signal received at a first radio channel into a second radio channel.
  • the first and second radio channels are different by frequency, direction or tirneslot
  • the interfering radio input is generated by a human generated source or by a natural source.
  • the plurality of performable actions includes filtering of electronic noise.
  • the plurality of performable actions includes postponed relaying of a received audio signal.
  • the postponed relaying may prevent collision, may enable quality of service and may enable service prioritizing.
  • the method includes attaching a digital signature to the certain message.
  • the digital signature may contain parameters associated with the certain message. Also, the digital signature may be encrypted before relaying.
  • the plurality of performable actions includes the step of relaying of a stored message several times.
  • a program storage device readable by a computerized apparatus is used for tangibly embodying a program of instructions executable by the computerized apparatus to perform the above method.
  • a remote control apparatus for controlling a relay device for relaying audio messages between radio transceivers in a radio network.
  • the relay device includes several ports and a processor.
  • the ports are configured for receiving input and for providing the received input for further processing.
  • the processor is configured for getting a certain message related to the provided radio input from the ports, obtaining parameters associated with the certain message, and performing actions on the certain message in accordance with the obtained parameters.
  • the apparatus is configured for remote controlling of the relay device. For example, the remote control apparatus transmits data items to the relay device, wherein reception of the data items by the relay device effects actions performed by the relay device.
  • remote control apparatus Other exemplary actions by the remote control apparatus are: (a) Remote controlling of the radio transceivers connected to the relay device. (b)Issuing remote alarm for events like electronic noise stream, electronic interference, operational fault event and power failure alert.
  • the remote controlling of the relay device includes changing its operational parameters
  • the remote controlling of the relay device includes submitting of digital data or speech items to trigger commands to the relay device.
  • Fig. 1 is a block diagram of a relay device serving a radio network.
  • Fig. 2 is a flow chart of a method for operating a relay device.
  • Fig. 3 is a flow chart of an algorithm for the method for operating a relay device.
  • Fig. 4 is a block diagram of a radio network having a relay device and a remote control apparatus for controlling the relay device.
  • each of the verbs "comprise”, “include” and “have”, and conjugates thereof, are used to indicate that the object or objects of the verb are not necessarily a complete listing of members, components, elements or parts of the subject or subjects of the verb.
  • a relay device 10 as disclosed by the current application, is depicted in the block diagram of Fig. 1.
  • Relay device 10 relays messages between radio transceivers 12a and 12b in a radio network 16.
  • the relayed messages are audio messages like those transferred between army tactical devices or between cab drivers, and between a cab driver and a cab call center.
  • the messages may be also data messages or data over audio messages.
  • data over audio message may be a radio over internet protocol message (RoIP) which carries destination address with it.
  • RoIP radio over internet protocol
  • Network 16 may work at a half-duplex communication mode or at a full-duplex mode.
  • the device 10 includes ports 20a, 20b and 22 and a processor 30.
  • the ports 20a, 20b and 22 are configured for receiving input and for providing the received input for further processing.
  • the ports 20a, 20b include analog to digital (ATD) conversion unit 32 to convert an audio message to a digital signal, for example.
  • the ports 20a, 20b also include digital to analog (DTA) conversion unit 34 to convert digital data into an audio message before transmission.
  • ATD analog to digital
  • DTA digital to analog
  • the received input may include an audio signal from transceivers 12a or 12b, interfering radio input from a noise source 36, and/or a stream of digital data from a digital source 39, which communicates with port 22.
  • the noise source 36 may be a human generated source like an engine working nearby or a high voltage cable, or a natural source like an atmospheric disturbance or lightning.
  • Interfering radio input may also be received from electronic interference source 38. For example, in tactical environment, a hostile entity may use electronic warfare sources to block the radio communication of the side having relay device 10.
  • the processor 30 is configured for three main tasks.
  • the first task is getting a certain message related to the received input.
  • the certain message may be the received input directly from port 20a, either in the original form or after ATD conversion by ATD unit 32.
  • the received input is first stored in a message buffer 40 and later on the processor gets it as the certain message from the message buffer 40. As the message is stored in the buffer 40, it may be relayed several times to the transceivers 12a and/or 12b.
  • the second task of the processor 30 is to obtain parameters associated with the certain message.
  • Exemplary parameters are noise level, message priority, message length, and message destination.
  • the third task of the relay device 10 is to perform actions on the certain message in accordance with the obtained parameters. For example, the action may be relaying the certain message to its destination. Another example is applying certain procedure for noise removing of the message according to the found noise level. More details on the parameters and actions appear below.
  • the device 10 may include a speech recognition module 45, configured for analyzing the certain message, and thus facilitates the obtaining of the parameters by the processor. To this aim, the device includes a memory SO adapted for storing a plurality of speech items.
  • the certain message is compared by the speech recognition module 45 to the plurality of speech items for matching, and the performed actions on the certain message may be done in accordance with that matching.
  • the message destination may be found by matching a keyword item in the first part of the message with one of the stored speech items. Consequently, the performed action is to broadcast the message to the matched destination.
  • relay device 10 Rather than the standard single handset port in the prior art relay devices, relay device 10 has two handset ports 52a and 52b for linking the relay device 10 to operator handsets 56a and 56b, respectively. That enables voice communication of two operator's simultaneously two transceivers.
  • the relay device 10 should better provide protection or alarm in case that two operators communicate simultaneously with different radio transceivers 12a and 12b at a different security level.
  • Relay device 10 may have two operational modes, a manned operational mode and a fully automatic operational mode. Intermediate operational modes in between the manned operational mode and the automatic operational mode may also be possible. In a preferred embodiment, relay device 10 may work in parallel on up to eight
  • Fl-Fl message relays and on up to four F1-F2 message relays.
  • a method 100 for operating a relay device 10, according to the present disclosure, is shown in the flow chart of Fig. 2.
  • the relay device 10 is configured for relaying audio messages between radio transceivers 12a, 12b in a radio network 16.
  • the method 100 includes several steps 110-210, wherein the steps of method 100 may be performed in any order or simultaneously, unless It is clear from the context that one step depends on another being performed first.
  • a first step is receiving 110 radio input which may Include an audio signal from radio transceivers 12a and 12b, interfering radio input from noise source 36 or electronic interference source 38, and a stream of digital data from a digital source 39.
  • the digital source 39 may be a radio transceiver, or a remote controller.
  • a second step is storing 120 the received radio Input in a message buffer 40. Later on, the stored radio input may be used as a message to be relayed. Alternatively, the stored radio input may be processed by actions like noise filtering to get a certain message for relaying, which may also be stored. Once the message is stored it may be relayed later for several times.
  • the step of obtaining 130 parameters associated with the certain message may be conducted substantially simultaneously with storing 120, or a little bit later.
  • Exemplary parameters are signal strength, noise level, message priority, message length, encryption level, and message destination. Measurement of signal strength is a common feature of radio transceivers and relay devices.
  • ATD unit 32 may provide the message length.
  • the processor may build noise histogram and deduce the noise level or the signal to noise ratio from analysis of the noise histogram.
  • a message priority may appear in the message as part of its header, especially if it contains a digital signature as detailed below.
  • Encryption level may be obtained from type or style of the audio signal, or from an Indication of encryption level which arrives from the transceiver with the message.
  • Message destination channel may be the same as the message source channel in Fl-Fl mode. Generally, mode of operation and/or routing table which gives a destination per a source transceiver may determine the message destination. Also, in RoIP message the message destination parameter is simply been read from the message header, The obtained 130 parameters are used in the step of performing 140 actions on the certain message, effecting the undertaken actions and their operating details. The actions performed on the message are taken of a plurality of performable actions which includes relaying a message to a radio transceiver.
  • the action is relaying the message immediately. Also, some actions need certain obtained parameters to be executed correctly.
  • the obtained 130 parameters may be used also for feeding into a management database data on the network transceivers for tracking and analysis, whereas the database may reside either in the relay device or elsewhere,
  • the method may include the step of recognizing 150 speech items within a message. Also, the method may include the step of attaching 160 a digital signature to the certain message.
  • the digital signature may contain parameters associated with the certain message, and it may be encrypted.
  • the digital signature is disposed either on the message header or on the message tail. In an audio message the digital signature may be too short or at too high acoustic frequency to be heard or noticed by a human user.
  • the certain message is relayed 170 to a radio transceiver in accordance with the recognized speech items.
  • the destined radio transceiver 12b may be determined by recognizing 150 the name of the destined transceiver operator in the header of the received radio input.
  • certain message priority may be determined by matching a speech item to a word in the message, and consequently the message is relayed in a priority appropriate to the message.
  • the speech recognition module 45 may be able to identify a vocal signature.
  • module 45 may store a previous message and give its source a user code, and later it may identify that a new incoming message has the same source and may act in accordance with that identification. For example, that identification may facilitate the decision on message destination.
  • the method 100 may include remote controlling 180 relay device 10 by submission of speech items to relay device 10. Such a remote controlling may be done by a dedicated remote control apparatus as disclosed below, or by transceiver 12a having appropriate authorization.
  • the plurality of performable actions may include actions to deal with a noisy message which is related to both interfering radio input and a signal from a radio transceiver 12a or 12b.
  • the interfering radio input is reduced 190 to get a relatively clean message, relative to the noisy message.
  • the clean message is relayed to a radio transceiver.
  • the plurality of performable actions includes relaying a message related to an audio signal received at a first radio channel into a second radio channel.
  • the first and second radio channels are different by an operating frequency, antenna direction or timeslot in a time division multiplexing network.
  • the plurality of performable actions may include postponed relaying 200 of a received audio signal.
  • the feature of postponed relaying may prevent collision, at least simple ones. For example, suppose that a message should be relayed to transceiver 12a, while transceiver 12a has started to receive a message. Then, the relay device 10 waits until transceiver 12a has stopped to receive, and only then the relay device 10 broadcasts the postponed message to transceiver 12a.
  • relay device 10 sends a relayed message to transceiver 12a, after "listening" to the line before starting transmission to ensure it is not busy. Right after transmission ends, a message is received that seems to be a continuation of a message broadcasted before the relay device 10 slopped transmitting. Consequently, the relay device issues an alarm to the operator that a collision of two messages has happened. In response, the operator or the relay device 10 itself initiate retransmission of the relayed message.
  • postponed relaying 200 enables quality of service (QOS), and service prioritizing.
  • QOS quality of service
  • the plurality of performable actions includes the step of repeated relaying 210 of a stored message for several times.
  • the broadcasting may be to a single transceiver 12a, multicasting to all transceivers in network 16, or multicasting to a sub group of the transceivers of network 16.
  • a program storage device readable by a computerized apparatus is used for tangibly embodying a program of instructions executable by the computerized apparatus to perform method 100.
  • the program storage device may be part of the processor, a separate component of the relay device, a compact disk carrying the program or a flash memory unit used to feed the relay device with the program.
  • the storage device may also be an FPGA (field programmable gate array) component or an ASIC (application specific integrated circuit) element.
  • the flowchart of Fig. 3 illustrates an algorithm 300 for implementing some of the steps of method 100.
  • the relay device Once the relay device is started, it goes into an idle stale 310 waiting for a message, and checking that status frequently with a lest 315 for a new message trigger arriving from ATD unit 32.
  • relay device 10 samples it 320, and perform on the sampled message two actions, simultaneously or with a minor time delay.
  • the first action is to store 325 the message in a message buffer 40.
  • the second action is to analyze the message by a variety of means. For example, applying a speech recognition module to identify keywords and determine parameters associated with the message. In a second example, the message is examined for a decision regarding its destination, relay priority, etc.
  • the message is checked 340 and 345 for transmission readiness. If the message should be returned to the source transceiver arrival of the message end is checked 340. Also, an operator approval for relaying or transmitting may be desired sometimes. If ready 350, a digital signature is attached 355 to the message, and the channel is checked 360 for availability. Once available, the message is relayed 365 to its destination, and the relay device 10 goes back to idle state 310.
  • a remote control apparatus 400 for controlling a relay device 10 is shown in the block diagram of Fig. 4.
  • Apparatus 400 is configured for remote controlling of the relay device 10.
  • the apparatus 400 may remote control relay device 10 to change its operational parameters.
  • Remote control apparatus 400 may transmit data items to the relay device 10, wherein actions of relay device 10 are effected in accordance with the content of the data items.
  • radio network 16 may have two frequency channels and three ports 20a, 20b and 22, wherein ports 20a and 20b are allocated for the first channel Fl while port 22 is allocated for the second frequency channel F2.
  • the remote control apparatus 400 may send to the relay device 10 a message containing a data item with a coded order "Fl - 20a, F2- 20b t 22" . Consequently, port 20b is reallocated to F2, leaving only port 20a allocated for Fl .
  • remote control apparatus 400 is remote controlling of radio transceivers 12a and 12b via their connection to the relay device.
  • transceiver 12a at Fl is ordered to change operating frequency to F2.
  • apparatus 400 may issue remote alarm for events like electronic noise stream, electronic interference, operational fault event and power failure alert.
  • Additional remote control action is positioning the relay device 10.
  • the positioning data may be used for the operator of the remote control apparatus 400 to design best deployment and allocation of relay devices 10 for optimal coverage of a geographical territory.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention porte sur un dispositif pour relayer des messages entre des émetteurs-récepteurs radio dans un réseau radio, qui comprend des ports et un processeur. Les ports sont configurés pour recevoir une entrée en vue d'un traitement supplémentaire. L'entrée reçue comprend un signal audio, une entrée radio brouilleuse et un flux de données numériques. Le processeur est configuré pour obtenir un certain message associé à l'entrée reçue, pour obtenir de paramètres associés au certain message, et pour effectuer des actions sur le certain message en fonction des paramètres obtenus. Le dispositif comprend un module de reconnaissance vocale, configuré pour analyser le certain message, et une mémoire conçue pour stocker une pluralité d'éléments vocaux. Le message peut être comparé à la pluralité d'éléments vocaux pour détecter une concordance, et les actions effectuées sur le certain message peuvent être effectuées en fonction de cette concordance. Le dispositif de relais peut également être commandé par un appareil de télécommande.
PCT/IB2009/051920 2008-12-16 2009-05-10 Système et procédé d'exploitation d'un dispositif de relais WO2010070459A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12275108P 2008-12-16 2008-12-16
US61/122,751 2008-12-16

Publications (1)

Publication Number Publication Date
WO2010070459A1 true WO2010070459A1 (fr) 2010-06-24

Family

ID=42268371

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2009/051920 WO2010070459A1 (fr) 2008-12-16 2009-05-10 Système et procédé d'exploitation d'un dispositif de relais

Country Status (1)

Country Link
WO (1) WO2010070459A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2965692A1 (fr) * 2010-10-01 2012-04-06 Euro Media France Traitement de signaux video issus de cameras de surveillance urbaine
CN106374992A (zh) * 2016-08-11 2017-02-01 上海交通大学 无人机最优中继位置定位方法及系统
WO2018186846A1 (fr) * 2017-04-05 2018-10-11 Nokia Technologies Oy Facilitation d'établissement de connexion à un réseau sans fil
WO2021113818A1 (fr) * 2019-12-05 2021-06-10 Cubic Corporation Notification de défaillance de transmission de passerelle radio

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5983072A (en) * 1994-10-06 1999-11-09 Nokia Telecommunications Oy Establishing a telecommunications connection in a mobile communication system
US6341146B1 (en) * 1998-10-29 2002-01-22 Lucnet Technologies Inc. Phase-shift-keying demodulator and demodulation method using a period-width windowing technique
US6606280B1 (en) * 1999-02-22 2003-08-12 Hewlett-Packard Development Company Voice-operated remote control
US20050105527A1 (en) * 2001-12-21 2005-05-19 Thales Communications Belgium S.A. Secure communication system, comprising a local network such as ethernet, in particular on board an aircraft
US20080013606A1 (en) * 2006-06-30 2008-01-17 Nokia Corporation Relay

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5983072A (en) * 1994-10-06 1999-11-09 Nokia Telecommunications Oy Establishing a telecommunications connection in a mobile communication system
US6341146B1 (en) * 1998-10-29 2002-01-22 Lucnet Technologies Inc. Phase-shift-keying demodulator and demodulation method using a period-width windowing technique
US6606280B1 (en) * 1999-02-22 2003-08-12 Hewlett-Packard Development Company Voice-operated remote control
US20050105527A1 (en) * 2001-12-21 2005-05-19 Thales Communications Belgium S.A. Secure communication system, comprising a local network such as ethernet, in particular on board an aircraft
US20080013606A1 (en) * 2006-06-30 2008-01-17 Nokia Corporation Relay

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2965692A1 (fr) * 2010-10-01 2012-04-06 Euro Media France Traitement de signaux video issus de cameras de surveillance urbaine
CN106374992A (zh) * 2016-08-11 2017-02-01 上海交通大学 无人机最优中继位置定位方法及系统
CN106374992B (zh) * 2016-08-11 2019-01-18 上海交通大学 无人机最优中继位置定位方法及系统
WO2018186846A1 (fr) * 2017-04-05 2018-10-11 Nokia Technologies Oy Facilitation d'établissement de connexion à un réseau sans fil
WO2021113818A1 (fr) * 2019-12-05 2021-06-10 Cubic Corporation Notification de défaillance de transmission de passerelle radio
GB2604566A (en) * 2019-12-05 2022-09-07 Cubic Corp Radio gateway transmission failure notification
US11601827B2 (en) 2019-12-05 2023-03-07 Cubic Corporation Radio gateway tranmission failure notification
GB2604566B (en) * 2019-12-05 2024-09-18 Cubic Corp Radio gateway transmission failure notification

Similar Documents

Publication Publication Date Title
US7801133B2 (en) Secure network-routed voice multicast dissemination
US8280423B2 (en) Voice hub processing
US10027805B2 (en) Connection management for a vehicle telematics unit
US7221290B2 (en) Packetized voice communication method and system
US6721537B1 (en) Method for disseminating a message
RU2414056C2 (ru) Способ, базовая станция и мобильный терминал для режима передачи с малой мощностью
US7660579B2 (en) Communication network acceleration system and method
CN101385373B (zh) 基于位置的通信控制系统
US8446883B2 (en) Method and apparatus for enabling networked operations in voice radio systems
US20070133491A1 (en) Mobile communication apparatus and channel switching method of ad-hoc communication
EP1560453A2 (fr) Procédé,système et programme de radiocommunication semi-duplex.
CN103051648B (zh) 车辆间的通信方法和系统、用于车辆间通信的服务器
RU2387080C1 (ru) Система видеомониторинга и связи
WO2010070459A1 (fr) Système et procédé d'exploitation d'un dispositif de relais
WO2014119196A1 (fr) Appareil de communication mobile, station de base, appareil serveur, système de communication mobile, procédé et programme de communication mobile
EP1152554B1 (fr) Délivrance d'informations multimédia par des satellites à des véhicules
RU77738U1 (ru) Система радиосвязи с подвижными объектами
RU44907U1 (ru) Система радиосвязи с подвижными объектами
US10116382B1 (en) Ad hoc high frequency network
US11595141B2 (en) Unified communications link status analyzer apparatus for agile control in contested environments
US9985900B2 (en) Method and system for determining a number of vehicle-to-X messages to be discarded
US9084145B2 (en) Communication apparatus
RU52290U1 (ru) Система радиосвязи с подвижными объектами
US20160142173A1 (en) System architecture for managing resources in a communication network
RU82971U1 (ru) Система радиосвязи с подвижными объектами

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09833011

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 09833011

Country of ref document: EP

Kind code of ref document: A1