TWI358940B - Wireless in-band signaling with in-vehicle systems - Google Patents

Description

1358940 September 20th, 100th revised replacement page IX, invention description: L-*-- [Technical field of invention] The present invention relates to data communication from a vehicle using a voice channel in a digital wireless telecommunication network Methods and equipment for obtaining emergency services, concierge services, and other services. RELATED APPLICATIONS This application claims priority to U.S. Provisional Patent Application Serial No. 60/981,487, filed on Jan. 20, 2007. Copyright Notice ©2007-2008 Airbiquity Inc. » A portion of the disclosure of this patent document contains copyrighted material. The copyright owner has no objection to the reproduction of this patent document or the disclosure of this patent in a patent file or record of a patent or trademark office. However, all copyrights in section 37 CFR § 1.7 1(d) will be retained. [Prior Art] Wireless telecommunications coverage has become almost universal in many parts of the world, especially in industrialized countries. However, in the same way, in many developing countries, the entire region lacking the traditional copper wire telecommunications infrastructure will directly skip the technology and switch to deploying wireless technology. Modern wireless network. The road provides a range of voice services and data services. The technical details of these services can be found in many places. For example, the 3Gpp standard group website www.3gpp.org 〇 However, some wireless data services are very slow and the coverage is very high.

Spotty. Conversely, wireless voice services tend to be of good quality and can be used almost everywhere. What we mean by "in-band" communication is the difference between a data channel, a data channel, a control channel, or other non-voice wireless service. The voice channel is characterized by a special "feature", for example, based on normal human speech, with only a very narrow range of sound frequencies being transceived. In fact, sophisticated compression and coding techniques are known to achieve very efficient transmission and/or voice-like purposes on digital wireless networks. However, these voice-programming devices—a(3) are called “vocoders”—they are usually implemented in software, Dsp, and the like—and do not properly emit non-speech sounds. Conversely, it will be carefully designed to filter out voice signals. Relevant information may also be found in U.S. Patent No. 6,144,336, which is incorporated herein by reference. Additional disclosures may be found in U.S. Patent No. 6,69,681, which is also incorporated herein by reference. And finally the 'relatively related disclosures are set forth in U.S. Patent No. M93,338, the disclosure of which is hereby incorporated by reference in its entirety. The previous patents are owned by the assignee of this application. In the detailed description of the preferred embodiments, the additional aspects and advantages of the present invention will be described with reference to the accompanying drawings. [Summary of the Invention] . For example, an automatic car) now has the function of communicating on a wireless network. We call these car systems a telematics service.

S 6 1358940 September 2, 100. The daily revision replaces the telematics client system. The telematics system may include built-in hardware and software designed to operate in an automated automotive environment. The telematics software includes a "consumer application software" which may be any application software, especially application software that uses data transfer. Accordingly, the client system will include a wireless transceiver, such as a wireless transceiver known to portable cellular phones. Here, we mean "data" means application software or user data, not data used to transmit human voice content in the radio (phone code data) or data used to control wireless operation. (Control channel data). The user data transfer can be done on the wireless network. Preferably, the "in-band communication" is used in the remote information service vehicle system for user data transmission. What we mean by "in-band messaging" is in the voice channel, which is different from data channels, control channels, or other non-speech wireless services. In-band messaging must use appropriate facilities at both ends of the call (for example, an in-band modem). A problem with the prior art is to detect when the modem is turned on and off. That is, when a call is connected (establishing a link), when should the receiving system switch from voice mode (usually using a microphone and speaker) to data mode (in this mode, it will operate from audio ( Voice) channel to restore data)? This is a question that controls the transmission. The prior art control communication in the wireless network uses a non-in-band control channel. The court may have a problem because the control channel may be unique to the operator and therefore not available to all customer systems. The type of signal we need to inform the car system to control when to start and shut down 1358940 _____ September 20, 100 rev. Replacement page The way the in-band modem is used, without the need to use a control channel to achieve this. In other words, the in-band modem on the vehicle side (remote information service client) needs a reliable way to detect the server side (for example, a PSAP or a public service answering point, which is located in the call acceptance center or "data center". It may be automatic (unattended) when it is ready to receive data to be transmitted from the vehicle in the voice channel or to detect when the server side requests the data. This job should be done in an automated manner, that is,

There is no need for human intervention D. In the embodiment, after establishing a voice channel call, the server at the call center will transmit a preset audio signal (for example, a 2225 Hz tone), the signal has passed. Choose to span the current vocoder technology. In other words, the frequency of this signal is selected from within the voice band, so that it is encoded in the vocoder and successfully transmitted as a voice via the voice channel. At the vehicle or car side, the vehicle system receives signals from the voice channel during the voice call. It detects this specially signaled signal and treats it as a control signal to initiate data transmission during the same voice channel call. In another embodiment, the purpose of the reverse compatibility with the old in-band modem is to transmit a frequency modulated audio signal from the call accepting center to the IVS as a signaling tone. In an embodiment, the vehicle system (IVS) keeps the sound system speaker silent in response to receiving the preset signal, so that the passenger of the vehicle does not see the consumption in the form of a sonar frequency tone. The sound of the data transmitted between the application software and the call receiving center.

S 8 1358940 September 20, pp. Amendment Replacement Page • In some embodiments, the ivs may transmit a response signal in response to receiving and decoding the preset signal from the vocabulary. The "response" tone may have a second selected frequency, that is, 1 778 HZ in the explanatory example. It also has a selected duration length, for example 300 msec in the explanatory example. This is the signal that the IVS is ready to begin the in-band data 乂5 inflammation. If the feeder detects that the signal is maintained for at least a predetermined critical time period, in other words, about 2 〇〇 msec, then the server will stop transmitting the initial tone. In an example 10 of the IVS, it will be configured to perform the above method. The vehicle system (IVS) includes the following requirements: a telematics software that will be stored in a memory and will be adapted to The utility model is configured to send and receive data through a voice channel in a digital communication network, and the remote information service software includes a consumer application software and an in-band communication data machine. The in-band signaling data encodes and decodes data transmitted from and to the consumer application software; a vehicle sound system including a speaker and a microphone; a built-in power module, and The electro-active module will be adapted to communicate with at least the voice channel communication switch through a digital communication, for controlling the vehicle sound system to the built-in telephone module in a controllable manner. Groups to subscribe to voice communications, or to couple the in-band data unit to the built-in phone module: for data communication, all of which are in a single voice channel wireless pass The device is configured to interrupt a voice conversation by coupling the in-band signaling modem to the built-in telephone module to initiate an in-band material conversation and will ring 1358940 during a voice channel call The revised replacement page of September 20, 100 shall be silenced by a preset signal tone received by the built-in telephone module by Fukui to silence the speaker of the vehicle sound system; and wherein the signal tone has a pre-predetermined signal Set the sound frequency. [Embodiment] Figure 1 is a simplified block diagram of a typical call path for a wireless voice call (i.e., a telephone call in a wireless telecommunications network). The analog voice signal from a microphone 11 is digitized by an A/D converter 12 and the receiver is fed to a codec 14 encoding algorithm (with 8 frames per second). The encoder 16 will generate a plurality of compressed data packets (typically one packet will have a 2 ms audio frame) and will feed this data stream to one of the radio transmitters 18 of the radio transceiver 18. On the other side, a radio receiver will pass the packets to decoding algorithm 17, which will then reconstruct the incomplete speech signal (incompletely) into a pCM stream. This pcM stream will eventually be reverse transformed into an analog voltage which is then applied to a speaker 19. Using this type of system, by carefully selecting the frequency, timing, and enabling 2 special techniques to "smart" a vocoder into a way that allows information to appear "human" data, The way to launch a moderate amount of data (here we refer to the user data, and the weight loss call information). This type of data communication (which uses a helmet to twist this ..., 。.. 曰 channel) is sometimes referred to as "in-band messaging." It is called "sending data machine" (using the old machine word of the right child 4* in the traditional "landline" telecommunications (the hardware and / or soft body of the modulator - demodulation transformer) • 万式10 1358940

Come and implement it. Several patents published have revealed in-band signaling techniques for exchanging digital data over the audio channel of a wireless telecommunications network. In one example, the input receives digital data. The encoder converts the digital data into a sound tone that is used to synthesize the frequency of the human call. The digital data is also encoded to prevent the speech encoding circuitry in the telecommunications network from corrupting the synthesized sound tones representing the digital data. Then, the output is combined to output the synthesized sound tones into a two-digit wireless telecommunication network. In some cases, the "tone" data is sent along with the synchronized voice. These tones may be shorter and less noticeable. In other modes of implementation, sometimes referred to as "blank and bum", speech is truncated when data is transmitted via the voice channel. Also, in other modes of operation, a portion of the audio and video spectrum is used for speech, while other portions are reserved for data usage. This helps the decoding on the receiving side. In-band messaging must use appropriate facilities at both ends of the call (for example, in-band modems). The problem is detecting when the modem is turned on and off. That is, 'when the call is connected (establishing a link), when should the receive line switch from voice mode (usually using a microphone and speaker) to data mode (in this mode it will operate from the sound ( Voice) channel to restore data)? . Preferably, this should be done automatically, that is, without human intervention. Prior art control communications in wireless networks utilize a non-in-band control channel. Different from the voice channel, the control channel signaling may be unique to the telecom operator and thus not available to all customer systems. c; Mi, 11 1358940 September 20, 100 Amendment Replacement Page One of the applications of this technology is related to the motor vehicle as an explanation in this document). Today, many handles have the ability to communicate over a wireless network. We refer to these vehicle systems as telematics customer systems. Figure 2 is a simplified block diagram of an illustrative vehicle system (Μ)} showing an example of a relevant part of a typical telematics client system. This client system is designed to be used. In the 汽车2, the telematics software 22 includes a "consumer application software 23", which may be any application software, especially through wireless An application software for data transmission over the Internet. For example, 'the consumer application software may be related to navigation or entertainment. In operation, the consumer application software will pass data (better system, data packet) to the area. The in-band modem 27 will convert the data (and, if appropriate, the packet header and other additional information) into sound frequency tones, which will appear at the "PCM switch 25". One purpose of the customer system (IVS) 21 is to transfer remote funds between a vehicle and a word processor on the same wireless voice call that the passenger uses to communicate with the operator. Information service. Sometimes, the server is located at the "call acceptance center" where the operator can be contacted. It is the same as the 91丨 emergency call acceptance center. Here, the system must have a switch, which will be in one zone. Interrupting the car sound system at the beginning of the data machine conversation 26 » If the switching decision is to be controlled by the server side, then the in-band signaling must be used to indicate when a data machine conversation should begin. Figure 2, in this embodiment, the pc Μ switcher 5 is composed of

S 12 1358940 September 20, 100 revised the replacement page "data machine detection j technology to control. There are two ways to cause errors: error detection (false detection ^ speaker 29 should not be muted when it should not be muted) 'and missing detection (speaker 29 is not kept silent when it is muted). The frequency of occurrence of both errors should be as infrequent as possible, but it is a challenge to prevent them from happening. One of the important advantages is the improved detection performance. The time advancement process of the first in-band modem detection technology shown in Figure 3 is not intended. The given tone frequency shown in the figure is only an example. In operation, the server 41 (which is located in the call acceptance center or "data center", which may be automatic (unmanned)) emits a preset sound frequency tone 42 (: for example, 2225 Hz) ), the frequency tone 42 has been selected to span the current vocoder technology. This is the signal to be sent to the car system to interrupt the sigh and start a conversation with the data machine in the band. After detecting the frequency tone 42 for at least a predetermined threshold time period (in other words, about 3 〇 msec) on the UVS side, it will be deemed that the "initial detection" has been completed and the IVS 21 will be in the vehicle. The speaker 31 (Fig. 2) is kept silent (so that the passenger of the vehicle does not hear the "noise" of the material transmitted in the form of the sound frequency tone 42). If the selected "hairpin" is detected for longer than the preset critical time period, then it will endure that it has been "confirmed" and will be sent from the lvs 2" - "Respond" Give the server 41. Accordingly, the IVS 21 will switch the PCM switch 25 of FIG. 2 for coupling the in-band data unit to the built-in telephone module 'to transmit data to the data center (in the voice channel) . The "response" tone 44 has a second selected frequency, that is, an interpretation of 13 1358940 - September 18, 100, revised l778 Hz in the alternate pageability example. The "response" tone also has a selected duration of the door', for example, in the explanatory example, #3〇〇爪咖. This is the signal that the device starts talking to the in-band modem. If the server 4 detects that the signal has been maintained for at least a predetermined critical time period (in other words, about 200 msec), then the server 41 stops transmitting the starting tone 42. "The aforementioned strategy can be used in many applications, but as the wireless technology changes, there will be problems with the steps. Among them, the ones that are frequently improved are the vocoders described above. When the vocoder is encoding humans When speech becomes more effective, it sometimes becomes more difficult to transmit data via the voice channels used by the vocoders. The in-band control signaling technique described above can be used properly for certain sounds. The code, but it can not be properly used in other, newer styles. By studying the characteristics of the new vocoder and then trying to design a control signal technology that can be solved by a new type of coder The problem, even if it is successful, there are still many old-fashioned "old-fashioned data machines" that are used by vehicles in use. A successful communication system is important for both the old IVS (which has an old-fashioned modem) and the new IVS that uses the new vocoder to operate correctly. It also requires proper interaction with two or more different in-band modems deployed in a wide variety of vehicles (or portable applications, for example, handheld personal communication devices). For example, the 2225 Hz "initial detection" tone described above can be used with the old vocoder, but it will be filtered out in the new style. The best system is that the IVS just can't keep the speaker silent during the time. In the worst case, the in-band data communication system will malfunction.

S 14

September 2G Day Correction Replacement Page 1358940 The problem of reverse compatibility and forward compatibility between the data server and various mobile units is not limited to control signaling. Actual data transfer via some vocoders may require the use of frequencies that are compatible with older vocoders = very different frequencies. For example, with some older vocoders, 2 i 00 Hz (downlink) and 25 Hz Hz (uplink) are the practical frequencies used to encode the data. For other vocoders, lower frequencies (eg 1200 Hz and 1600 Hz) may be preferred. Therefore, it is very important for the server system to "discover" or detect the type of remote vocoder in use during a special call. It can be used not only to control the transmission but also to properly encode the data. It is not affected by the far-end tone code fit. Furthermore, the important system is that the server has to find the type of the far-end vocoder in use very quickly, for example, less than two seconds, so that it can be heard before another distracting data tone is heard. Sending - a suitable control signal to indicate that the IVS ' is used to silence the speakers in the vehicle (generally, the external telephone number used to contact the call center cannot be used to distinguish the remote data unit in use, 纟Because the same phone number is preferred for all IVS systems of a given vehicle manufacturer. Referring to the figure, for the sake of explanation, we assume that a tone of 2225 Hz is used as the control signal K on the old vocoder channel. This tone is not reliable on the new vocoder. According to another aspect of the invention, the servo 61 emits a frequency modulated (FM) tone 62 to cause a response tone 64' to oscillate between 500 and 6 inches. For example, the frequency may be switched every 20 or 40 msec; this indicates the magnitude of the strength of the system, the actual value is not important. ^ The frequency modulation is in the standard language 15 1358940 ___ K) 0 September 20 S Fixed a key point to prevent error detection during page-to-speech conversations. Reference is next made to Figure 5. If the server 61 must be backward compatible with the old IVS modem, then between the two types of response signals 64 and 44, between the new start 62 signal and the old start signal 42 (Fig. 2). alternately. It will be apparent to those skilled in the art that many changes in the details of the embodiments described above may be made without departing from the basic principles of the invention. Therefore, the scope of the invention should be determined only by the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a simplified block diagram of a typical call path for a wireless voice call (i.e., a telephone call in a wireless telecommunications network). Figure 2 is a simplified block diagram of an illustrative vehicle system (IVS). Figure 3 is a schematic diagram showing the time advancement process of the in-band data processor detection technology. 4 is a timing diagram of a time advance process for applying an in-band data machine detection technique in accordance with an embodiment of the present invention. Figure 5 shows a time progression diagram of a reverse compatible server where the reverse compatible feeder emits two types of start cans and listens to both types of response signals. In this way, the type of the machine can be identified. [Main component symbol description] 11, 3 1 : microphone

S 16 1358940 - September 20, 100 Correction Replacement Page 12: A/D Converter 14, 24: vocoder 16 · Ma Ma 17: Decoder / Algorithm 18: Radio Transceiver 19, 29 Speaker 21, 5 1 : Vehicle System (IVS) 22 : Telematics Software 23 : Consumer Application Software 25 : PCM Switch 26 : Vehicle Sound System 27 : In-Band Data Machine 41 , 61 Feeder 42 : ( Sound ) Frequency Tone 44 ' 64 Response Tone 62 : Frequency Modulation (FM) Tone 17

Claims (1)

1358940 X. Patent application scope: September 20, 100 revised replacement page CLAIMS 1. A method of wireless in-band signaling, comprising the steps of: providing a vehicle system (IVS) comprising in-vehicle signaling data for use in an incoming-action wireless voice and data communication Both g-communication and data communication are carried out on a single voice call through an I voice channel in a digital communication network; the vehicle further includes a car sound system for entertainment and communication purposes. The vehicle sound system includes a speaker and a microphone; a consumer application software is deployed in the IVS, and the consumer application software is coupled to the in-band transceiver data machine for use in the The ancient world transmits data through the in-band transmission data; in the IVS, the voice call is sent to a remote call receiving center through the digital wireless communication network; and the voice sent from the IVS is received at the call receiving center Calling; sending a preset calling tone to the Ivs from the call receiving center through the voice call; and in the IVS towel Responding to receiving the preset signaling tone to silence the sound system speaker, so that the passenger of the vehicle does not hear transmission in the form of sound frequency tones between the consumer application software and the communication center: the response center The sound of the information. 2. The method of claiming patent _1, and the method further comprises: measuring a duration of the tone of the signal; only if the duration of the tone of the signal exceeds a first predetermined threshold S 18 Leave the speaker silent after the day. 3. The method of claim 2, and further comprising: when the length of the tone duration exceeds a second predetermined threshold time period longer than the first-second time period A preset response signal is transmitted to the call acceptance center to confirm receipt of the transmission tone. 4. The method of claim 2, and the method includes: a response to receiving the signaling tone and starting to subscribe to a data conversation during the same voice call for transmitting the digital wireless The voice channel of the communication network sends data from the IVS to the call acceptance center. 5. The method of claim 4, and the further steps include: (4) transmitting a frequency-modulated tone to the call center to the IVS as the tone to be used with the old in-band modem Reverse compatible. 6. The method of claim 5, wherein the frequency-modulated tone alternates among a plurality of selected sound frequencies, the sound frequencies being selected to be compatible with known vocoders,俾Making these signaling tones pass through the vocoders. 7. The method of claim 6, wherein the frequency modulated tone alternates between two selected sound frequencies. 8. The method of claim 5, wherein the frequency-modulated tone is exchanged in the selected frequency during the selected period, the selected period having a size rating of about 2 〇 咖To 4 〇 c. 9. The method of claim 5, wherein the ivs includes transmitting the response signal' in response to identifying any of the selected sound frequencies for the signaling tone. Sept. 20, pp. 20, pp. 1358940. 10. The method of claim 4 includes automatically starting the band after a preset set period starting from the detection of the response signal at the remote center. Internal information conversation. 11. The method of claim 4, wherein the call acceptance center is left unattended. 12. The method of claim 3, wherein the response signal is a tone of sound having a predetermined duration. 13. The method of claim 12, wherein the response signal is preset to have a duration of the order of 300 m s e c. 14. The method of claim 4, wherein the consumer application software transmits location information to the data conversation through the in-band data center of the call receiving center for issuing emergency services. 15_—A vehicle system (IVS), comprising: a machine readable memory for storing a remote information service software; a processor for reading the machine readable memory and executing the storage therein Remote telematics software; the telematics software is configured to execute on the processor to transmit and receive data over a voice channel in a digital wireless communication network; the telematics software includes a consumer The application software and the in-band transmitter data machine, the in-band transceiver data device is used for encoding and decoding data sent from and sent to the consumer application software; a vehicle sound system comprising a speaker and a microphone; The built-in telephone module 'is configured to transmit the digital wireless communication S 20 The network is used for at least voice channel communication; a switch is used to couple the vehicle sound system with a controllable ^ 5 ^ ^ work spur. To the built-in telephone module for accessing ^^^^, 疋 仃 吾 吾 吾 吾 吾, or coupling the in-band transmitter data machine to the built-in-.OD ^ ^ live module for data communication, It is all performed during the early (10) tone channel wireless call; and 5: the switch is configured to interrupt the voice by coupling the inband signal modem to the built-in phone module Talk to start an in-band data conversation, and together - taste, " in response to the detection of the built-in phone module during a voice channel call and the 4 Λ ϊΛ 2;, ! iL· ^ received The preset signal tone is used to silence the speaker of the car's sound system; the predetermined signal tone of the clock has substantially the preset sound frequency. Time: 6. The vehicle system of claim 15 wherein the signal tone has at least a first predetermined threshold duration before the switch allows the sound system to remain muted. ^ I7. The vehicle system of claim 16, wherein the predetermined sound frequency is about 2225 Hz. 18_ The vehicle system of claim 16, wherein the first predetermined critical duration is on the order of 30 msec. 19. The vehicle system of claim 5, wherein the in-band data is provided if and if the received signal tone exceeds a second critical duration length that is longer than the first predetermined critical duration length The opportunity to send a preset response signal through the built-in telephone module during the same voice channel call. 20. The vehicle system of claim 19, wherein the second temporary 21 £: 1358940 has a duration of 300 msec. XI. Schema: If the next page, September 20, 100, revised replacement page S 22