TWI399935B - Portable digital radio group navigation system - Google Patents

Description

Portable digital radio group navigation system

The invention relates to a portable digital radio group navigation system, relating to the field of broadcast communication technologies, in particular to the field of frequency hopping spread spectrum radio communication technology, which has real-time voice broadcast and dialogue functions, and can perform data broadcasting.

In museums and art galleries, it is often the case that a tour guide can guide a group of visitors, and the voice of the guide often interferes with other visitors. In some outdoor places of visit, such as monuments, outdoor art installations, etc., it is often seen that the guides use loudspeakers for commentary; if there are more than two groups of tours at the same time, mutual interference will occur. More serious and troublesome. The group members who are surrounded by the guides often cause the tour to be unsmooth. In the environment of museums and art galleries, this interference to other people's conditions is obviously an uncivilized phenomenon. Therefore, some famous museums require group visitors to use a headset-style navigation system.

In addition, for the guide, it is very boring to repeat the same introduction. If you can transfer some of the fixed reference navigation content to the group by data broadcast, the team members will Play and listen, the guides focus on introducing more interesting navigation content and answering questions that are of particular interest to each team member, the guide's work will be more vivid, and the quality of work and work efficiency can be improved.

In order to improve the above-mentioned interference to others, to protect the rights of each visitor, to maintain the civilized order of museums and art galleries, and to improve the quality and efficiency of the guide's work, it is clear that an appropriate navigation system is needed.

The existing navigation system can be roughly divided into a broadcast navigation system and a portable navigation system. The broadcast navigation system is a centralized navigation for all visitors. The simplest way is to use the sound reinforcement in a local area. The broadcast of the device and the navigation of the navigation content are very rough. In general, it is only suitable for brief introduction, and the visitor cannot refuse to listen. It is often a kind of interference.

In order to avoid interference with visitors who do not need to listen, the broadcast navigation system often uses infrared broadcasting technology. When the visitor needs to listen, the infrared receiving earphone is used to listen to the navigation content, and the navigation content of the infrared broadcast navigation system Basically, it is still a centralized tour.

The portable navigation system is popular for situations where detailed navigation instructions are required for individual items. The portable navigation system is a personalized portable device, and the navigation content is pre-stored in the portable navigation device. When using the portable navigation system, visitors can choose the navigation content that they are interested in according to their needs, according to the code of the live display. The world's more famous museums and art galleries provide portable navigation system services.

Among the various navigation methods, the guides who guide the on-site commentary are still the most vivid way to navigate. Through dialogue, visitors can get the best results. Usually, the guides serve from one person to ten. Several people are more common, and sometimes the number may reach dozens. For example, a class may have more than 30 students.

The existing portable group navigation system is basically a simplified walkie-talkie system, and the portable device of the guide has a speaking function, and the portable device of each group has a receiving function. Due to the limited channel, such group navigation systems are more susceptible to interference. For example, in the effective radius, when another radio intercom system with the same radio channel is encountered, both parties will be disturbed, and such group tours The system does not have digital communication capabilities and cannot transmit data files.

In general, an ideal group navigation system needs to have at least

The following features and effects:

1. The guide and each team member have their own handheld mobile device that can be used to listen to the instructions.

2. When the guide is conducting a tour, the group members do not need to be surrounded by the guides and do not hinder the actions of others.

3. When there are multiple groups of visiting groups to visit, there will be no interference between the visiting group tour systems.

4, the team members can use the navigation system, the guide to ask questions, and can talk to the guide.

5. There is no unreasonable restriction on the number of members.

6. With voice and digital broadcast transmission capabilities, the guides can choose to use the speech method or voice data file transmission method to broadcast to the group members to provide navigation services.

7, low power consumption, the use of batteries, can work for a long time.

8, low price, so that the system's setting, rental, maintenance, all aspects of the price is reasonable.

In the prior art, the IEEE 802.15.1 Personal Area Network (PAN) technology is closest to the requirements of the aforementioned group navigation system, and the IEEE 802.15.1, 2002 specifications are identical to the Bluetooth V1.1. IEEE 802.15.1 Personal Area Network (hereinafter referred to as Bluetooth) is a frequency hopping spread spectrum (FHSS) radio communication technology; frequency hopping spread spectrum (FHSS) technology, originally applied to military communications, such as: torpedo The guide has excellent anti-interference ability.

"Bluetooth" is an application of frequency hopping spread spectrum technology in the field of people's livelihood; today's computer peripheral devices, audio, telephone, and camera have widely adopted Bluetooth technology. In addition to excellent anti-interference ability, Bluetooth technology has low energy. Features such as power consumption and low price are also popular reasons. In addition, Bluetooth technology also has excellent voice and digital transmission capabilities; in general, Bluetooth technology is closest to the above-mentioned group navigation system performance requirements.

Bluetooth uses 2400MHz-2483.5MHZ electromagnetic wave band as the radio transmission medium. The whole frequency band is divided into 79 channels with a bandwidth of 1MHz (23 channels in some countries), using lower RF power (1mW) and fast frequency. Frequency Hopping (FH) to avoid radio frequency collision and interference between different Bluetooth devices. The effective distance of Bluetooth technology is generally 10 meters (the effective distance of the larger power mode can reach 100 meters), and the frequency jumps per second. 1600 times.

Bluetooth technology has low RF power, and its effective distance is generally within 10 meters of the user's circumference. Therefore, the network formed by it is called Wireless Personal Area Network (WPAN), which is called piconet. ).

Each piconet has a master and at least one, up to seven slaves, and more than seven slaves, although still attributable to the piconet, must enter the mooring (PARK) state, the slave unit in the parked state can only maintain frequency synchronization with the piconet, but cannot enter the CONNECT state, and must pass the paging of the main unit (PAGE) or the slave unit that is parked. REQUEST, the slave unit in the PARK state can enter the CONNECT state, but the slave unit in the piconet, if it has reached the full amount, already has 7 slave units, it must first The CONNECT state of at least one of the slave units is suspended, and the new slave unit can join the network, and the connected unit can perform substantial communication. A piconet is an ad-hoc network with a centerless, self-organizing capability.

The process of establishing a piconet is a master unit and a slave unit, which recognize each other and establish a frequency hopping synchronization process. In the process of establishing a network state, a slave unit is used by the master unit ( Master) assigns an active unit address (AM_ADDR/Active Member ADDRess), also known as LT-ADDR/Logical Transport ADDRess, and each slave unit intercepts the packet with its active unit address (AM_ADDR). The slave unit of the state can enter the energy-saving state when there is no action, or enter the parked state (PARK) from the network, and the parking state is the most energy-saving state of the piconet.

The slave unit entering the parked state automatically discards its active unit address (AM_ADDR), but is assigned a new docking unit address (PM_ADDR/Park Member ADDRess) by the master unit, and a new access request address (AR_ADDR/Aaccess) Request ADDRess).

The active unit address (AM_ADDR) is composed of 3 bits, the parking unit address (PM_ADDR) and the access request address (AR_ADDR), each consisting of 8 bits.

The active unit address (AM_ADDR), the parking unit address (PM_ADDR), and the access request address (AR_ADDR) are temporary addresses that change automatically with the piconet connection status. In addition, each Bluetooth unit has one. The fixed and unique identification code, called the Bluetooth device address (BD_ADDR/Bluetooth device address), and the Bluetooth device address (BD_ADDR) consist of 48 bits, which play an important functional role. For example, the frequency hopping sequence of each piconet is determined by the Bluetooth device address (BD_ADDR) of the master.

The master unit can use the parking unit address (PM_ADDR) or the Bluetooth device address (BD_ADDR) to issue a UNPARK command to the unit in the parked state and reply to its CONNECT state.

The piconet has two modes to establish a logical link, which is an ACL/Asynchronous Connection Less oriented (hereinafter referred to as an ACL link) for supporting packet switching. (packet switch), and SCO/Synchronous Connection Oriented (hereinafter referred to as SCO link) and eSCO (extended SCO), which support voice switching.

Before establishing an SCO (including eSCO) link, an ACL link must be established; when establishing an ACL link, the slave unit obtains the Bluetooth device address (BD_ADDR) and clock phase data of the master unit (the master). It can be obtained by using FHS/Frequency Hop Synchronization, and the slave unit establishes a frequency hopping sequence consistent with the main unit according to the Bluetooth device address (BD_ADDR) of the master unit and the clock phase.

The frequency hopping sequence is the most important function of the Bluetooth device. The Bluetooth devices whose frequency hopping sequence is completely synchronized can recognize each other and communicate. The frequency hopping sequence is the Bluetooth device address of the piconet master (BD_ADDR). ) and the clock phase is determined.

Therefore, after the slaves obtain the Bluetooth device address (BD_ADDR) and the clock phase of the host, they can establish a synchronization frequency hopping sequence consistent with the host to form a communication network; the Bluetooth device entering the PARKing state is utilized. This feature maintains its relationship with the piconet.

Bluetooth technology is a technology still in development. For example, Bluetooth V1.2 has improved the shortcomings of SCO links in V1.1, and has improved the eSCO architecture. However, Bluetooth technology also has many limitations. For example, the number of slave units is limited. The number of slave units per piconet cannot exceed seven, and the voice transmission is peer-to-peer communication. These restrictions make Bluetooth technology impossible. To meet the needs of the aforementioned group navigation system, new technical solutions must be sought to solve the problem.

U.S. Patent No. 7,336,924, "Broadcast type service system using bluetooth type radio network" and U.S. Patent Publication No. US 20060116075 A1, "Bluetooth broadcast data stream to multiple bluetooth mobile terminals", all of which seek to break through piconet The number of slave units in the medium cannot exceed 7 limits to implement a broadcast function or a broadcast-like function.

US Patent No. 7336924 mainly uses a "RECEPTION INFORMATION PROVIDING DEVICE" as a coordination device, and the "reception information providing device" first obtains the setting data required for receiving the radio information from the Bluetooth device at the transmitting end, and the Bluetooth at the receiving end. When the device wants to receive the radio information of the transmitting end, the setting data of the incoming and receiving state is first acquired from the "reception information providing device", and the Bluetooth device at the receiving end completes the setting of the receiving state, and starts to receive the radio information of the transmitting end. The purpose is to transmit Bluetooth devices at the transmitting end, which can provide information services to more than seven Bluetooth device receiving ends. Such a system is only a broadcast-like system, cannot provide real-time voice broadcasting, and the "receiving information providing device" makes the system Complicated, not suitable as a handheld mobile radio system.

The technical solution disclosed in US Patent Publication No. US 2006/0116075 A1 (PCT/IB03/05461) is basically a fixed system that uses at least one base Bluetooth device to propagate broadcast data in a data streaming manner while utilizing The slave unit in the PARK state can still receive the characteristics of the beacon packet, so that each slave unit in the piconet, including the unit in the park state, continues to receive the data stream, but the base According to the built-in program, the Bluetooth device releases the parking state of the parking unit (PARK) in time to avoid a timer timeout interrupt. Although this system can broadcast more than seven Bluetooth slave units using Bluetooth devices, the fixed base Bluetooth device obviously cannot be used as a handheld mobile radio navigation system, and its purpose is not real-time voice broadcast, slave unit and master unit. There is no dialogue between them.

In view of the limitations of the above Bluetooth technology, the object of the present invention is to disclose a technical solution to overcome the limitations of the Bluetooth technology and to implement various functions required for the aforementioned ideal group navigation system.

First, the technical means of the invention:

The object of the present invention is to provide a portable digital radio group navigation system, which has a real-time voice broadcast and dialogue function, and the technical means thereof comprises: a host and at least one slave machine, and the frequency hopping frequency spread between the host and each slave machine The radio baseband is a physical layer and has the same channel hopping sequence; a synchronous connection oriented (SCO) link is constructed between the host and each sub-machine, and each sub-machine is set with the same logical transmission address, and the synchronization is accessed. a connection oriented (SCO) link; and at least one asynchronous connection oriented (ACL) link, each of the slaves setting the same logical transport address, accessing the at least one asynchronous connection oriented (ACL) link; the synchronous connection The guiding link is composed of a synchronous downlink voice channel and a synchronous upload voice channel, and the synchronous downlink voice channel is in front, and the synchronous uplink voice channel is immediately behind; the synchronous downlink voice channel is a host pair slave. Voice broadcast channel; the synchronous upload voice channel is a handset-to-host voice call channel; and the asynchronous connection guide link is composed of at least one a polling channel for the host to poll the slave and a polling response channel for the polling slave to respond to the host, and the polling channel is in front, and the polling response channel is immediately behind; The polling channel is a channel that the host polls the monitoring substation for speaking. The polling response channel is a channel that the slave responds to the host polling monitoring.

The polling channel and the polling response channel of the asynchronous connection guiding link are symmetrically configured; when the host performs polling monitoring on the slave, the host sends a polling command to all the slaves via the polling channel in a broadcast manner. The inquiry instruction includes a child identification code, and the slave corresponding to the child identification code must respond, and the slave immediately responds via the polling response channel immediately after the polling channel; the host recognizes the child according to the response order. Machine, and will respond to the sub-machines that require the speech to be ordered; the sub-machine that is required to speak in the sorting is synchronized by the host to transmit the voice channel, and after issuing the authorization speech command, it becomes a sub-machine capable of talking, and the sub-machine that can be called is based on The authorized speaking instruction issued by the host changes the logical transmission address setting of the synchronous connection guiding link, and obtains the right to use the synchronously uploaded voice channel.

The host is a broadcast relay device for uploading voice, and the voice uploaded by the callable slave can be broadcasted by the synchronous downlink voice channel through the relay of the host, and the conversation between the slave and the host that can be called. Broadcast to all the sub-machines.

The host is a broadcast relay device for uploading voice, and the host is further provided with a broadcast selection device. After the broadcast selection device is activated, the voice uploaded by the callable slave can be relayed via the host and synchronized. The voice channel is broadcasted, and the conversation between the slave and the host that can be called is broadcast to all the slaves; the broadcast selection device is turned off, and the dialogue between the host and the callable slave is not relayed.

The host is also provided with a data broadcast facility through which the data files can be broadcasted by the host to all the slaves in a data broadcast manner.

The host is provided with a memory socket to accept data file memory.

Portable digital radio group navigation system, using Bluetooth baseband technology, a SCO synchronous voice link is established between the host and each sub-machine, using HV2 mode of transmission every four time slots, SCO synchronous voice link occupies two time slots The remaining two ACL channels form an ACL asynchronous digital link; each of the slaves sets the same synchronous connection guide link logical transport address and the same asynchronous connection guide link logical transport address; the synchronous connection guide chain The even time slot of the path is a synchronous downlink voice channel of the host to the slave; the odd time slot of the synchronous connection guiding link is a synchronous upload voice channel of the slave to the host; the asynchronous connection guiding link is a link that the host polls the child machine; the even time slot of the asynchronous connection guide link is a polling channel that the host polls the child machine; the odd time slot of the asynchronous connection guide link is a child pair The host polls and responds to the polling response channel.

The portable digital radio group navigation system uses a Bluetooth baseband technology to establish a SCO synchronous voice link between the host and each sub-machine, using a mode in which HV3 is transmitted every six time slots, and the SCO synchronous voice link occupies two The time slots, the remaining four ACL channels form two ACL asynchronous digital links; each of the slaves sets the same synchronous connection guide link logical transport address and the same asynchronous connection guide link logical transport address; The even time slot of the synchronous connection guiding link is a synchronous downlink voice channel of the host to the slave; the odd time slot of the synchronous connection guiding link is a synchronous upload voice channel of the slave to the host; the asynchronous connection is oriented The link is a link that the host polls the slave; the even time slot of the asynchronous connection guide link is a polling channel that the host polls the slave; the asynchronous connection guides the odd time slot of the link, It is the polling of the host to the host, and the polling response channel is responded to.

The portable digital radio group navigation system, when the system setting program is started to perform system construction, the system setting program transmits the Bluetooth device address and the clock phase of the host to each slave machine to be connected to the host; the system setting program simultaneously assigns each The same synchronous connection guide link logical connection address and the same asynchronous connection guide link logical connection address of the sub-machine; the system setting program stores the Bluetooth device address of each sub-machine in the host, and the system setting program is also in order, Assigning a group member address to each sub-machine, the group member address is stored in each corresponding sub-machine and the host, and a one-to-one correspondence system relationship list is established in the host with the Bluetooth device address of each sub-machine obtained by the host .

Second, the beneficial effects of the invention:

1. Compared with the traditional group navigation system currently on the market, the present invention uses frequency hopping spread spectrum digital radio technology, has strong anti-interference ability, high voice quality, and can transmit data.

2. The invention can be based on the Bluetooth baseband technology, and innovates and expands on the existing Bluetooth baseband technology. At present, the Bluetooth system is already a mature technology, especially the hardware price of Bluetooth has been quite stable, and the present invention It is possible to share the price advantage of Bluetooth hardware and achieve the goal of low price, so that the invention can be popularized and put into practical use, and is in line with economic principles.

3. Symmetrically configured synchronous connection The channel in the directed link, the pre-synchronized downlink voice channel provides a mechanism for the host to perform voice broadcast on the slave; the immediately subsequent synchronously uploaded voice channel provides a callable pair The mechanism for the host to conduct voice conversations, the control method only involves Medium Access Control (MAC), which does not involve hardware.

4. Symmetrically configured non-synchronous connection The channel in the pilot link provides a mechanism for the host to poll the slave; the mechanism that the slave must respond to the polling command, in addition to continuously monitoring whether the slave requests to speak, It can monitor the communication status of the handset.

5. Compared with digital audio broadcasting DAB (Digital Audio Broadcast), the present invention is not only a mobile digital audio broadcasting system DAB, but also has a real-time two-way dialogue function, and any slave S can talk with the host M to implement a group. The function of the navigation system team member to talk to the guide.

6. The broadcast relay device is set in the host, and the conversation between the callable slave and the host can be relayed and distributed, and shared with all the members to meet the actual needs of the group tour.

7. The host also sets a broadcast selection device, so that the user who uses the group navigation system of the present invention can select to use the broadcast or separate dialogue according to actual needs.

8. Through the asynchronous connection guide link, the host can broadcast data to all the sub-functions, and transmit data files, such as audio compression files. When the data files are transmitted, the host does not affect the voice broadcast or the conversation with the sub-machine that can be called.

9. When implementing the Bluetooth-based implementation, the Bluetooth packet can be directly used as the HV2 type synchronous connection oriented (SCO) link, and a synchronous connection oriented (SCO) link and a non-synchronization are constructed between the host and the slave. Connection oriented (ACL) link. Or directly use the Bluetooth packet for the HV3 type Bluetooth Synchronous Connection Orientation (SCO) link, between the host and the slave, construct a synchronous connection oriented (SCO) link and two asynchronous connection oriented (ACL) links. .

10. When the system setting program is started to perform system setting, the system setting program transmits the Bluetooth device address and clock phase of the host to each slave member to establish a synchronized frequency hopping sequence, and the host gives each slave the same The logical transmission address of the SCO link and the ACL link makes it a host-centric real-time voice broadcast system. All setting work is completed when the system setting program is started, and the electromagnetic wave environment is relatively simple.

11. When the system setting program is executed, the system setting program also assigns a group member address to each sub-machine in sequence, which can be used as the second identification code of the first identification code of each sub-machine except the address of the Bluetooth device, and the group member address is one. Short address, which is good for transmission efficiency when necessary.

For convenience of description, the embodiment of the present invention will perform comparison based on Bluetooth technology. Therefore, the technical specification file of Bluetooth is also a reference file of the specification of the present invention.

On the other hand, although the present invention can be constructed on the basis of Bluetooth, the present invention is not limited to being constructed on the basis of Bluetooth.

In order to specifically present the technical solution of the present invention, the following embodiments will be constructed and illustrated on the basis of Bluetooth, using Bluetooth terminology, for example, for smooth text, time slots and channels often have the same meaning.

The following is a detailed description of the following embodiments in accordance with the embodiments shown in the drawings: FIG. 1 is a system explanatory diagram of the present invention. The figure discloses an application situation of a portable digital radio group navigation system of the present invention. In one exhibition hall Z, two visiting groups simultaneously use the portable digital radio group navigation system of the present invention (hereinafter referred to as a group navigation system). The group navigation system 100 and the group navigation system 200 are respectively provided, and each system has a host M held by a guide and a slave S held by a plurality of members. The host M of the group navigation system 100 is M 100, and the host M of the group navigation system 200 is M 200; the group navigation systems 100 and 200 are based on a frequency hopping spread spectrum (FHSS) radio baseband. Digital radio system; each group navigation system includes a host M and at least one slave S; in Figure 1, the host M 100 has 5 slaves S, which are S101, S102, S103, S104, S105; the host M 200 has 8 sub-machines S, which are S201, S202, S203, S204, S205, S206, S207, S208; the host M and the slave S are all handheld mobile devices; see also FIG. 4, wherein the synchronous connection guide Link, referred to as SCO; non-synchronous connection-oriented link, referred to as ACL.

Between the host M and each of the slaves S, an identical synchronous connection guide link SCO and an identical asynchronous connection guide link ACL are constructed; and the synchronous connection guide link SCO is composed of a synchronous downlink voice channel. A and a synchronous upload voice channel C, and the synchronous downlink voice channel A is in front, and the synchronous uplink voice channel C is immediately behind; the synchronous downlink voice channel A is a voice broadcast channel of the host M to the slave S The synchronous upload voice channel C is a voice call channel of the slave S to the host M; and the asynchronous link guide link ACL is a polling channel B1 and a child that can be used by the host M to poll the slave S. The polling response buffer B2 responds to the polling of the host M, and the polling channel B1 is in the front, and the polling response channel B2 is immediately behind; the host M polls the channel B1 and polls each Whether the slave S requests to speak, the polled slave S transmits the response information to the host M via the polling response channel, and the slave S that responds to the positive information and the slave S that responds to the positive information is After the host M is authorized, it becomes a callable Slave, which can call slave synchronization upload a voice communication channel C of the right to use synchronous upload a voice communication channel C, only the opening of the sub-unit to talk to, and within the same time only a slave S can call.

The channel in the non-synchronous connection-oriented link ACL is symmetrically configured; and when the host M polls the slave S, the host M sends a poll that is transmitted to the slave S via the polling B1. Within the message, there is a slave identification code SC, which is polled and the slave S corresponding to the slave identifier SC must respond, and the slave S sequentially uploads the response information to the host M via the polling response channel B2.

As shown in FIG. 1, each group member using the present invention can move freely without having to surround the guide, and the guide uses the respective hosts (M100, M200) to perform real-time voice on the slave S held by the group member. The broadcast, as shown in the synchronous downlink voice channel A in Fig. 1, can also be heard by the guide when the group member is not at the guide, such as the slave S201; the guide can perform real-time voice broadcast to the group member, It is also possible to use the host M to broadcast data to each of the slaves S held by the group member, as shown in the asynchronous connection guide link B (that is, the ACL in FIG. 4) in FIG. 1; using the data broadcast, the guide can A pre-prepared audio compression file, for example, an audio compression file conforming to the ISO-MPEG-1 Layer III (ISO11172-3) (known as MP3) standard, transmitted to the sub-machine S held by the group member, and each sub-machine S can Listen to the receiving side, or save the received audio compressed file, and then play it back.

The aforementioned ISO-MPEG-1 Layer III (MP3) standard was originally developed for digital audio broadcasting (DAB/Digital Audio Broadcast), and audio compression technology, which was developed in 1987, can compress audio to 12 to 1 while still maintaining CD. The sound quality is very suitable for audio digital broadcasting. If it is only telephone voice (2.5kHz), it can be compressed to 96 to 1.

Although audio navigation is the main way to provide navigation services, images and movies are also very helpful, so the aforementioned data broadcasting is not limited to audio digital broadcasting, but also can transmit image or video data files when the data broadcast contains When transmitting images and movie data files, the host M and the slave S must naturally have appropriate display devices.

Furthermore, the host (M100, M200) has a memory socket (not disclosed) to receive a pre-prepared memory (not disclosed); the members of each group navigation system (100, 200) can be used at any time. The slave S sends a dialogue request to the host (M100, M200) held by the corresponding guide, and holds the members of the slaves S105 and S206 as shown in FIG. 1 to request the dialogue and the guide through the host ( After authorization by M100 and M200), the member holding the slaves S105 and S206 can start the conversation by synchronously uploading the voice call channel C with the guide through the synchronous connection guide link.

If more than one person requests communication conversation at the same time, the host M sorts the sub-machines according to the sequence in which the sub-machine S issues the dialogue request, and the authorized sub-machine starts the conversation after the guides sequentially authorize.

The host M sends the authorization command by synchronously transmitting the voice channel A, and the slave device S that requests the speaker in the data packet to be called, and the authorized slave device becomes the callable slave, and the slave that can be called is issued according to the host M. The authorization command changes the logical access setting of the synchronous connection guide link to obtain the right to use the synchronously uploaded voice channel C.

As shown in FIG. 2, it is a schematic diagram of a Bluetooth packet format. The Bluetooth transmission is a slot 10 as a basic unit, and a slot interval time T is 625 microseconds (μs), and each time slot is a channel; Each time a slot transmits a packet, the Bluetooth packet consists of three parts, namely an access code 1, a packet header 2, and a payload 3.

The access identification code 1 has 68 or 72 bits, the packet header 2 has 54 bits, and the payload 3 has 0 to 2745 bits.

The access identification code 1 is composed of a preamble of 4 bits, a sync word 12 of 64 bits, and a trailer 13 of 4 bits, and access identification. Code 1 enables the Bluetooth device to recognize its own piconet; the packet header 2 enables the Bluetooth device to intercept its own packet, and the packet header 2 has an active cell address of 3 bits (AM_ADDR). 21 is also a logical transport address, a 4-bit packet type code 22, a 3-bit flag 23, 24, 25, respectively flow 23, ARQN 24, SEQN 25, and 8 The packet header error detection code HEC 26 is composed of one bit, and the packet header has 1/3 Forward Error Correction (FEC) function, so the total length is 54 bits; the payload 3 is the information content. .

The SCO link and the ACL link each have a dedicated packet type. There are four types of control packets that are commonly used for SCO links and ACL links. They are: ID, NULL, POLL, FHS packets.

The ID packet only uses the access code 1 as a signal transmission.

The NULL packet only has an access code 1 and a packet header 2 for transmitting control related information in the packet header.

The POLL packet also has only an access code 1 and a packet header 2 for the master unit to force the slave unit to respond.

The FHS is a FH-Synchronization packet used to exchange the Bluetooth device address (BD_ADDR) and clock phase.

The packet includes at least an access code 1, each packet occupies a slot 10, and the time interval T of each time slot is 625 microseconds (μs), and the time slot 10 displays the channel, Bluetooth. The frequency hopping is 1600 times per second, that is, there are 1600 time slots per second. The master unit can only transmit in even time slots, and the slave unit can only transmit the next odd time slot in its even time slot. Transmission is a time division duplex (TDD) communication.

The voice communication of the Bluetooth SCO link has telephone voice quality (64Kbps), and there are four types of voice-specific packets, namely HV1, HV2, HV3, and DV.

The four types are symmetric transmissions, each transmission is a time slot. In addition, the single-slot DM1 data packet is a data packet type that can be used in both the SCO link and the ACL link, and the DM1 type data packet Take up one time slot.

The HV1 voice-specific packet is transmitted once every two time slots, the HV2 voice-specific packet is transmitted once every four time slots, and the HV3 voice-specific packet is transmitted once every six time slots. The DV is a voice and data packet. Simultaneously transmit voice and data.

The SCO link will reserve the used time slots, so the SCO link is considered a circuit switch link. After the SCO link is established, it can communicate directly at any time without polling. Each master unit can establish three SCO links simultaneously for the same slave unit or different three slave units.

Before establishing a SCO link, an ACL link must be established. After the SCO link is established, if there is a redundant ACL link, it can be used to perform ACL digital communication for any slave unit, including the slave unit that has established the SCO link. The master unit can only have one ACL link to the same slave unit.

When establishing an ACL link, the master unit (host) assigns an active unit address (AM_ADDR) to the slave unit (slave), the master unit (host) itself has no active unit address (AM_ADDR), and the active unit address (AM_ADDR) is composed of three. The bit is composed, in which b000 is reserved for broadcast, so Bluetooth can only have at most seven slave units (slave), and the slave unit (slave) is prohibited from returning during broadcast.

The Bluetooth SCO link can only provide peer-to-peer connections, so the Bluetooth SCO link has no broadcast capability and can only have up to three SCO links. The ACL link can only have up to seven slave units at a time. Therefore, Bluetooth technology cannot provide more than seven units of broadcast services using the ACL link.

The technical solution disclosed in the aforementioned patent document is to break through the limitation that the Bluetooth technology can only have up to seven slave units to realize the broadcast function, but the technical solution is as described above, and obviously cannot meet the requirements of the portable navigation real-time voice broadcast of the group navigation system. .

As mentioned above, the process of establishing a piconet by Bluetooth is a process in which a master and a slave recognize each other and establish a frequency hop synchronization. During the process of establishing a network, each slave unit is The master unit is assigned an active unit address (AM_ADDR) and the active unit address (AM_ADDR) is a logical address.

Figure 3 is an illustration of a system address list of the present invention. The figure shows that when the system setting program is started, the host M transmits its own Bluetooth device address (BD_ADDR) and clock phase to each member of the slave S that is to be connected to the host M to establish a synchronized frequency hopping sequence. And the host M simultaneously assigns the same active unit address (AM_ADDR) to each slave S for constructing an identical synchronous connection guide link and at least one identical asynchronous connection between the host M and each of the slaves S. Guided link; when the system setting program is executed, the host M will also sequentially assign each sub-machine S to a unique group member address (GM_ADDR) in the system, and the host M also obtains the Bluetooth of each sub-machine S at the same time. The device address, the host M stores the Bluetooth device address (BD_ADDR) and the group member address (GM_ADDR) of each child device S in a one-to-one correspondence, and the group member address (GM_ADDR) is an 8-bit address. In addition to being stored in the host, it is also stored in the slave. When the host polls the slave, it polls one by one according to the group member address (GM_ADDR).

The group member address (GM_ADDR) corresponds to the Bluetooth parking unit address (PM_ADDR) and is an 8-bit address, so when using the present invention, each group can have a maximum of 255 group members. For a group of visiting groups, obviously this It is too big a number, so the number of team members is virtually unlimited.

The group member address (GM_ADDR) is a short address, which is beneficial to improve communication efficiency. Therefore, the slave device also stores its own group member address (GM_ADDR), and the group member address (GM_ADDR) becomes the first child identifier Bluetooth device address ( The second slave identification code other than BD_ADDR), when the host M issues an instruction to each slave S, can distinguish the slaves using the Bluetooth device address (BD_ADDR) or the group member address (GM_ADDR) of the slave.

In summary, when the host and the slaves complete the system setting procedure, the host M assigns a short address of each slave S, that is, the group member address (GM_ADDR), which is mainly stored in the host M, in the host. When M sends a polling command to the slave S, it is convenient to sort; as shown in FIG. 3, the Bluetooth device address (BD_ADDR) of the host M and the group member address (GM_ADDR) of the slave are stored in each slave S; in fact, the host M According to the group member address (GM_ADDR), it is enough to complete the work, because the host M is polled according to the group member address (GM_ADDR), and each slave can store its own group member address (GM_ADDR) to identify its own instruction. The host M does not have to store the Bluetooth device address (BD_ADDR) of each slave S.

FIG. 4 is a schematic diagram showing the sequence of SCO and ACL packets according to the first embodiment of the present invention. The figure shows that the same SCO link and the same ACL link are constructed between the host M and each slave S by using the Bluetooth baseband technology.

The SCO link shown in Figure 4 has a packet type of HV2 type, which is transmitted every four time slots. The first two time slots form one SCO link, and the remaining two time slots form an ACL link.

Each slave S sets the same SCO link and the same ACL link logical access address; and the even slot of the SCO link is the synchronous downlink voice channel A of the host M to the slave S; and the SCO The odd time slot of the link is the synchronous upload voice channel C of the slave S to the host M.

The ACL link is a link that the host polls the child machine; and the even time slot of the ACL link is the polling channel B1 that the host polls the child machine; and the odd time slot of the ACL link, It is the polling of the host to the host, and the polling response is to respond to channel B2.

In the first embodiment, there is only one SCO link, which uses a mode in which HV2 is transmitted every four time slots. The HV2 packet has a 2/3 Forward Error Correction (FEC) function and is highly resistant to interference.

The odd time slot of the SCO link is the synchronous upload voice channel of the slave machine that is designated to be uttered. It is usually muted and can only be used after the designated slave has obtained the right to send the call.

The ACL link consisting of the remaining two time slots is used for the host to send a polling packet, to monitor whether each sub-machine requests to speak, or for the purpose of digital broadcast downlink voice compression files (such as MP3).

When the host M sends the SCO voice broadcast packet, each slave S can listen to the voice broadcast, as shown by the slash triangle in FIG. 4, but each slave S is in the set state of prohibiting the response at this time, that is, the host M voice broadcast. At the time, each slave S prohibits the use of odd time slot backhaul of the SCO link, and the SCO link is odd time slots and remains muted.

The host M uses the ACL link to issue a polling packet to each slave S in the order of the group member address (GM_ADDR), and performs a point-by-point polling to monitor whether each slave S requests to speak. In FIG. 4, there are five slaves ( S1, S2, S3, S4, S5), the named sub-machine S, as shown by the hollow triangle in Figure 4, will immediately respond in the next time slot, for example: return an ID packet, if the host M does not Immediately receiving the response packet, the host M can assume that the slave S is too far away from the team, and enhances the transmit power when the slave S is polled next time. If there is a slave S requesting to speak, for example, the slave S3 is in time in FIG. At point X, when the required speaking device is pressed (not shown), the slave S3 will return the requested message when it is polled by the name, for example, returning a NULL packet.

After the host M receives the request message from the slave S3, when the guide allows the slave S3 to speak at the time point Y, the host M uses the even time slot of the SCO link to the designated slave S3. The instruction is issued, and the instruction is sent by broadcast, and the DM1 type packet is sent to all the slaves S, and the command carries the group member address (GM_ADDR) or the Bluetooth device address (BD_ADDR) of the designated slave S3, as shown in the figure. As shown by the backslash triangle in 4, the slave S3 of the designated group member address (GM_ADDR) or the Bluetooth device address (BD_ADDR), after receiving the permission permission command, cancels the setting of prohibiting the use of the SCO link odd time slot, and responds Confirm, for example: return a DM1 type packet, the slave S3 of the designated address, and set a new active unit address (AM_ADDR) according to the received command, for example, b111, after receiving the confirmation response, the host M will The active unit address (AM_ADDR) in the packet header of the SCO packet is also set to b111, and the logical connection between the slave S3 and the host M that can be called is completed in the SCO link.

The designated talkable slave S3 and the host M perform a separate dialogue by using the newly set active unit address (AM_ADDR). The network cable part in the SCO link in FIG. 4 displays the callable slave S3. A situation in which a separate conversation is made with the host M.

At the same time, the host M continues to use the ACL link to monitor whether the remaining sub-machines S are required to speak, and the identity codes of the sub-machines S that are required to speak are sorted and wait for authorization according to their order.

Further, the host M used by the guide can terminate the dialog setting of the designated slave S3 at any time, and reply to the original active unit address (AM_ADDR) setting of the designated slave S3 to terminate the session.

The host M is provided with a broadcast relay device (not shown), and the voice uploaded by the callable slave S3 can be broadcasted via the synchronous downlink voice channel A via the relay of the host M, and the callable slave S3 The dialogue with the host M is broadcast to all the slaves S.

The host M is further provided with a broadcast selection device (not shown). If the guide activates the broadcast selection device, the conversation between the guide and the callable slave S3 can be broadcasted through the host M.

If the guide closes the broadcast selection device, the guide and the talkable handset can talk individually via the SCO link.

In the case of a separate conversation, the other slaves S are still in the state of accessing the SCO link, but the information cannot be filtered. Therefore, the voice packets sent by the host M can only be intercepted by the slave S that can be called. Machine S cannot listen.

The situation in which the broadcast selection device is turned off is shown in Fig. 4. At the time point Y, after the guide authorizes the slave S3 to become a callable slave, only the host M and the slave S3 can talk.

When the Navigator starts the broadcast device of the host M, because the slave S3 that can talk can only use the odd time slot of the SCO link to upload the voice to the host, the callable slave S3 can only speak in the odd time slot. The host M (ie, the guide) also receives the voice uploaded by the slave S3 that can be called in this time slot. If the slave S3 that can be called and the voice uploaded by the caller are to be broadcasted, the host M must be available. The slave S3 of the call, the voice it uploads to the host M, delays the time slot, and broadcasts in the even time slot of the next SCO link. At this time, the function of the host M is similar to the repeater.

In order to avoid mutual interference, an automatic switching device (not disclosed) is provided in the host M. After the broadcast device is activated, the voice of the host M is preferentially broadcasted, and when the host M does not speak, the voice of the received callable slave S3 is automatically rebroadcasted. .

When the broadcast device is activated, the flow bit in the packet header of the voice packet (the eighth bit of the packet header) can be used to distinguish the voice packet, which is the voice of the host M voice or the relay slave S3. For example, when the host M sends a voice, the flow bit is set to b1, the slave S3 voice is relayed, the flow bit is set to b0, and the callable slave S3 distinguishes the received voice according to the state of the flow bit. Packet, when the received voice packet is the voice of the host M, the slave S3 automatically cuts off the headphone output to avoid the problem of echo.

When the broadcast function is selected, the broadcast content is determined by the sound control development in the host M (not shown), the voice of the host M is preferentially broadcasted, and the host M listens to the odd-numbered time slot of the slave S3, and listens to the callable slave S3. The voice, but the slave S3 that can talk, can only listen to the voice of the guide by broadcasting, and can not hear the voice of himself.

When the Navigator starts the broadcast device, the active unit address (AM_ADDR) in the packet header of the packet transmitted by the host M is set to b000, and all the slaves (S) can intercept the information to listen. When the broadcast device is turned off, the active unit address (AM_ADDR) in the packet header of the packet is set to the same value as the new active unit address (AM_ADDR) of the slave S3 designated to be talkable, and only the slave capable of talking can be made. S3 can intercept information.

FIG. 5 is a schematic diagram showing timings of SCO and ACL packets according to a second embodiment of the present invention. The figure shows that between the host M and the slave S, the same SCO link and two identical ACL links are constructed by using the Bluetooth baseband technology; the SCO link uses HV3 type packets, and each interval is six. In the mode of time slot transmission, the first two time slots form one SCO link, and the remaining four time slots form two ACL links.

Each slave S sets the same SCO link and the logical access address of the same ACL link; and the even time slot of the SCO link is the synchronous downlink voice channel A of the host M to the slave S; The odd time slot of the SCO is the synchronous upload voice channel C of the slave S to the host M.

The two ACL links are the links that the host M polls the slave S; and the even time slots of the two ACLs are the polling channels that the host M polls the slaves S; The odd time slots of the two ACL links are the polling response channels of each slave S to the host M for polling.

In the second embodiment, both ACL links can be used for polling and data broadcasting, and polling and data broadcasting can be performed alternately in turn, or simultaneously.

The difference between the second embodiment and the first embodiment is that the HV3 type packet of the SCO link of the second embodiment has no forward error correction (FEC) function, and the anti-interference ability is weak, but the two ACL links are compared. Multiple ACL links use resiliency.

Similar to the first embodiment, the host M is provided with a broadcast selection device (not shown). If the guide closes the broadcast selection device, the guide and the callable sub-group S3 are separated by the SCO link. dialogue.

The mechanism of the individual conversation is the same as that of the first embodiment, and the activity unit address (AM_ADDR) of the slave S3 to be designated to be called is set to b111, and the activity in the packet header is sent when the host M transmits the SCO link packet. The unit address (AM_ADDR) is also set to b111, which completes the logical connection mechanism of the individual conversation between the slave S3 and the host M.

The difference is that after the broadcast device is activated, the host M temporarily stores the received voice information of the callable slave, and after delaying five time slots, broadcasts in the even time slot of the next SCO link. The black part of the SCO link in FIG. 5 shows the situation in which the sub-machine S3 voice information that can be called after the broadcast device is activated is broadcasted after delaying five time slots.

Figure 5 shows five sub-machines (S1, S2, S3, S4, S5), the sub-machine S named, as shown in the hollow triangle in Figure 5, immediately responds in the next time slot, for example: return an ID Packet. If there is a slave S requesting to speak, for example, in the sub-machine S3 in FIG. 5, at the time point X, pressing the request to speak button (not shown), the slave S3 will return a request to speak when polled by the name. Information, for example: return a NULL packet.

After the host M receives the request to speak information, when the guide allows the slave S3 to speak at the time point Y, the host M uses the even time slot of the SCO link to issue the DM1 type to the designated slave S3. The packet speak permission instruction is shown by the backslash in Figure 5.

The host M in FIG. 5 starts the broadcast selection device (not shown) at the time point R, so at the time point Y, after the slave S3 is designated to allow the speech, the voice of the slave S3 is received by the host M. The relay broadcasts out, and the voice of the slave S3 in FIG. 5 is broadcasted after being delayed by 5 slots, but the mechanism is the same as that of the first embodiment, and the slave S3 cannot hear its own voice.

The foregoing embodiments can all utilize the frequency hopping spread spectrum baseband technology of the Bluetooth personal area network. The host M and each slave S include an SCO link for transmitting voice and at least one ACL link for transmitting data.

The link for transmitting voice and the link for transmitting data are set as the broadcast link of the host M to each slave S at the time of startup, and the host M uses the SCO link to perform real-time on each slave. Voice broadcast, while using the ACL link to perform point-by-point polling monitoring for each sub-machine, polling to monitor whether each sub-machine requires to speak.

For the slave that requests to speak, the host uses the SCO link to issue a DM1 type packet permission to speak, and the slave that is allowed to speak, obtains the active unit address (AM_ADDR) of the new SCO link according to the instruction, and completes the callable. The logical connection mechanism between the machine and the host.

Using the ACL link data broadcast function, the guide can also broadcast the pre-prepared voice compression file (such as MP3) to the handsets held by all the members through the ACL link, so that the group members can play and listen to themselves, using ACL. The voice channel is not affected when the link performs data broadcast. However, when the ACL link is used for data broadcast, the host stops sending the polling packet. After the data broadcast is completed, the host will automatically reply to continue to send the polling packet.

Data broadcasting and polling can also be designed to be interactive; in the second embodiment, since there are two ACL links, data broadcasting and polling can be performed simultaneously.

On the other hand, voice compressed files broadcasted by ACL link data are not limited to MP3 files, and a wide variety of similar compressed files are available. A file for data broadcasting can also be a data file for an image or a movie.

In summary, the technical solution of the present invention specifically implements the performance required by an ideal group navigation system described in the foregoing, and the present invention is more practical and effective than the conventional group navigation system. And industrial utilization.

The structure, features and effects of the present invention are described in detail above based on the embodiments shown in the drawings. Since the novel and progressive requirements are met, the invention patent application is filed according to the law; however, the above description is only a preferred embodiment of the present invention. For example, the scope of the invention is not limited by the scope of the invention, and the modifications of the invention are intended to be within the scope of the present invention.

1. . . Access identification code

11. . . Preamble

12. . . Synchronization code

13. . . Tail sync code

2. . . Packet header

twenty one. . . Active unit address (logical transport address)

twenty two. . . Packet type code

23, 24, 25. . . Flag

26. . . Packet header error detection code

3. . . Payload

10. . . Time slot

SCO. . . Synchronous connection guide link

A. . . Synchronous downlink voice channel

C. . . Synchronous upload voice channel

ACL, B. . . Asynchronous connection guide link

B1. . . Polling channel

B2. . . Polling response channel

SC. . . Child identification code

GM_ADDR. . . Group member address

BD_ADDR. . . Bluetooth device address

T. . . Time slot interval

M, M (100, 200). . . Host

S. . . Child machine

S (101 ~ 105). . . Child machine

S (201 ~ 208). . . Child machine

Z. . . Exhibition hall

X. . . Time point

Y. . . Time point

R. . . Time point

100, 200. . . Group tour system

Figure 1: System diagram of the present invention.

Figure 2: Schematic diagram of the packet format of the present invention.

Figure 3 is an illustration of a system address list of the present invention.

Figure 4 is a schematic illustration of a first embodiment of the SCO and ACL packet timing of the present invention.

Figure 5 is a schematic illustration of a second embodiment of the SCO and ACL packet timing of the present invention.

A. . . Synchronous downlink voice channel

B. . . Asynchronous connection guide link

C. . . Synchronous upload voice channel

M, M (100, 200). . . Host

S. . . Child machine

S (101 ~ 105). . . Child machine

S (201 ~ 208). . . Child machine

Z. . . Exhibition hall

100, 200. . . Group tour system

Claims (9)

A portable digital radio group navigation system, comprising real-time voice broadcast and dialogue functions, comprising: a host and at least one slave machine, wherein the frequency hopping spread spectrum radio baseband is used as a physical layer between the host and each slave Having the same channel hopping sequence; constructing a synchronous connection oriented (SCO) link between the host and each slave, each slave sets the same logical transport address, and accesses the synchronous connection guide (SCO) a link; and at least one asynchronous connection-oriented (ACL) link, each of the slaves setting the same logical transport address, accessing the at least one asynchronous connection-oriented (ACL) link; the synchronous connection-oriented link is a synchronous downlink voice channel and a synchronous upload voice channel, and the synchronous downlink voice channel is preceded, and the synchronous uplink voice channel is immediately followed; the synchronous downlink voice channel is a host-to-slave voice broadcast channel; The synchronous upload voice channel is a voice call channel of the slave to the host; and the asynchronous connection guide link is performed by at least one host to the slave The polling channel and the polling response channel that can be used by the polling slave to respond to the host, and the polling channel is in front, and the polling response channel is immediately behind; the polling channel is host polling monitoring Whether the slave requires a channel to speak; the polling response channel is a channel that the slave responds to the host polling monitoring. The portable digital radio group navigation system according to claim 1, wherein the polling channel and the polling response channel of the asynchronous connection guide link are symmetrically configured; when the host performs polling monitoring on the slave device, The host sends a polling command to all the sub-machines via the polling channel in a broadcast manner. The polling command includes a sub-machine identification code, and the sub-machine corresponding to the sub-machine identification code must respond, and the sub-machine is immediately connected. The polling response channel after the polling channel immediately responds; the host recognizes the sub-machine according to the response order, and sorts the sub-machines that request the speech; the sub-machine that requests the speech in the sorting is synchronously downlinked by the host, After the authorization command is issued, it becomes a slave that can be called. The slave that can talk can change the logical transmission address setting of the synchronous connection guide link according to the authorization statement issued by the host, and obtain the right to use the synchronously uploaded voice channel. The portable digital radio group navigation system according to claim 1, wherein the host is a broadcast relay device for uploading voice, and the voice uploaded by the callable slave can be relayed by the host. The synchronous downlink voice channel is broadcasted out, and the conversation between the slave handset and the host can be broadcast to all the slaves. The portable digital radio group navigation system according to claim 1, wherein the host is a broadcast relay device for uploading voice, and the host is further provided with a broadcast selection device, and after the broadcast selection device is activated, The voice uploaded by the callable sub-machine is relayed by the host, broadcasted by the synchronous downlink voice channel, and the conversation between the slave machine and the host can be broadcast to all the sub-machines; the broadcast selection device is turned off, the host and the call can be closed. The dialogue between the child machines is not relayed. The portable digital radio group navigation system according to claim 1, wherein the host is further provided with a data broadcasting facility, and the data file can be broadcasted by the host through the asynchronous connection guiding link. Broadcast transmission to all slaves. The portable digital radio group navigation system of claim 1, wherein the host is provided with a memory socket to receive a data file memory. The portable digital radio group navigation system according to claim 1, characterized in that: the portable digital radio group navigation system uses a Bluetooth baseband technology, and a SCO synchronous voice link is established between the host and each sub-machine. The mode in which HV2 is transmitted every four time slots, the SCO synchronous voice link occupies two time slots, and the remaining two ACL channels form an ACL asynchronous digital link; each of the slaves sets the same synchronous connection guide link. a logical transport address and a logical connection address of the same asynchronous connection guide link; the even time slot of the synchronous connection guide link is a synchronous downlink voice channel of the host to the slave; the synchronous connection links the odd time slot of the link, Is a synchronous upload voice channel of the slave to the host; the asynchronous connection guide link is a link that the host polls the slave; the even time slot of the asynchronous connection guide link is a host to the slave. The polling channel of the inquiry; the odd time slot of the asynchronous connection guiding link is the polling of the host to the host, and the polling response channel is responded to. The portable digital radio group navigation system according to claim 1, characterized in that: the portable digital radio group navigation system uses a Bluetooth baseband technology to establish a SCO synchronous voice link between the host and each sub-machine, using HV3 transmits mode every six time slots, SCO synchronous voice link occupies two time slots, and the remaining four ACL channels form two ACL asynchronous digital links; each of the slaves sets the same synchronous connection steering chain The logical transmission address of the path and the logical transmission address of the same asynchronous connection guiding link; the even time slot of the synchronous connection guiding link is a synchronous downlink voice channel of the host to the slave; the synchronous connection is connected to the odd time slot of the guiding link Is a synchronous upload voice channel of the slave to the host; the asynchronous connection guide link is a link that the host polls the slave; the even time slot of the asynchronous connection guide link is performed by the host to the slave Polled polling channel; the odd time slot of the asynchronous connection guiding link is the polling of the host to the host, and the polling response channel is responded to. The portable digital radio group navigation system according to claim 1, characterized in that: in the portable digital radio group navigation system, when the system setting program is started to perform system construction, the system setting program sets the Bluetooth device address and clock phase of the host. , is transmitted to each slave connected to the host; the system setting program simultaneously gives the same synchronous connection guide link logical connection address and the same asynchronous connection guide link logical connection address of each slave; the system setting program will The Bluetooth device address of each sub-machine is stored in the host, and the system setting program also assigns a group member address to each sub-machine in sequence, and the group member address is stored in each corresponding sub-machine and host, in the host The Bluetooth device address of each slave obtained by the host establishes a one-to-one correspondence system relationship list.