WO2008124964A1

WO2008124964A1 - A wireless communication method and wireless transmitting-receiving device of high throughput wireless personal area networks

Info

Publication number: WO2008124964A1
Application number: PCT/CN2007/001195
Authority: WO
Inventors: Kan Lu; Chongjun Jiang; Michael Chen; Bin Xu; Yiyan Tang; Huiyong Hong; Feng Wu; Shuangli Wu
Original assignee: 3Dsp (Beijing) Limited Corporation
Priority date: 2007-04-12
Filing date: 2007-04-12
Publication date: 2008-10-23
Also published as: CN101352019A

Abstract

A wireless communication method and wireless transmitting-receiving device of high throughput wireless personal area networks. The method uses the link control, the link Management and the upper layer protocol compatible with the bluetooth network, and uses the physical layer channel coding and signal modulating mode compatible with WLAN to implement the data transmission. It comprises the following steps: establishing the enquiring and access process communication link according to the bluetooth radio frequency and baseband protocol; implementing the data transmission according to the modified WLAN physical layer protocol; wherein, the synchronization, channel coding decoding and signal modulating mode of the said modified WLAN physical layer protocol is the same as that of the WLAN physical layer protocol. By the present invention, it can integrate the present resource of the two wireless communication network of WLAN and bluetooth, and it need not add the extra hardware or it need only change a few hardware to implement high throughput wireless personal area networks.

Description

Wireless communication method and wireless transceiver device for high-throughput wireless personal area network

The present invention relates to a wireless communication network, and more particularly to a wireless communication method and a wireless transceiver for a high-throughput wireless personal area network.

Background technique

At present, people are increasingly carrying more and more electronic information devices, such as laptops, mobile phones, and personal digital assistants (PDAs), which are no longer just necessary tools for business people, but also gradually enter daily life. These information devices are becoming more powerful and smaller in size, but people can't just be satisfied with their independent work, but there is an urgent need for easy interaction between devices. Therefore, a network that can connect personal devices in a small range, that is, a wireless personal area network (WPAN: Wireless Personal Area Networks) has emerged.

As a small-scale wireless connection technology, Bluetooth is one of the mainstream technologies for wireless personal area networks. It can realize convenient, flexible, secure, low-cost, low-power data and voice communication between devices. As a short-range wireless communication technology that replaces the wired connection between electronic devices, Bluetooth is characterized by its robustness, low power consumption and low cost. However, the transmission rate and transmission distance of the Bluetooth (usually within 10m radius) are very limited.

With the wide application of Bluetooth technology in the field of wireless personal area networks, people have put forward higher requirements on their transmission rate and transmission distance, and hope to obtain faster and farther data transmission through Bluetooth devices, for example, in digital cameras, Applications in multimedia wireless transmissions such as cameras, projectors, digital TVs, PDAs and other smart terminals.

Wireless Local Area Networks (WLAN) is a local area network technology widely used for wireless connection/wireless access between computers, computer peripherals, storage and network devices, such as IEEE802.11a, IEEE802.11b and IEEE802. 11g and other wireless network standards. Bluetooth and WLAN for different application scenarios are completely different in physical layer and upper layer protocols. Compared to Bluetooth, WLANs have higher transmission rates and longer transmission distances. However, with the widespread use of Bluetooth and wireless LANs, the same device often has both wireless LAN and Bluetooth capabilities, such as computers, mobile phones, and other smart terminals. Therefore, wireless communication devices with both Bluetooth and wireless LAN signal modulation and demodulation functions have been developed to implement Bluetooth radio frequency, baseband processing, link control and link management, as well as physical layer and medium access of wireless local area networks. Control (MAC: Media Access Control) layer. The wireless communication device is externally/built in a host computer, such as a smart terminal such as a computer or a mobile phone, and runs in a host controller such as a central processing unit (CPU: Central Processing Unit) or a microcontroller (MCU: Micro Controller Unit). WLAN high-level protocols, such as the logical link layer, network layer, transport layer, and application layer, implement WLAN functions together with Bluetooth high-level protocols such as L2CAP, RFCOMM/SDP, and application layers running in the host controller. Implement Bluetooth.

Although the prior art can simultaneously implement the functions of Bluetooth and wireless local area network on the same device, but because they work independently, the existing hardware/software resources of the wireless local area network and Bluetooth cannot be integrated to solve the low transmission rate of the wireless personal area network based on the Bluetooth technology. A defect with a short transmission distance.

Summary of the invention

In order to solve the problem that the device in which the Bluetooth and the wireless LAN function coexist in the above prior art cannot utilize the wireless local area network hardware resources to improve the transmission rate and the transmission distance of the wireless personal area network, the present invention provides a wireless transceiver for a high-throughput wireless personal area network. And wireless communication methods.

A wireless communication method for a high-throughput wireless personal area network, the method adopts link control, link management and upper layer protocol compatible with a Bluetooth network, and uses physical layer channel coding and signal modulation methods compatible with a wireless local area network to perform data transmission.

The method includes the following steps: establishing a query and access procedure of a communication link by using a Bluetooth radio frequency and a baseband protocol; performing data transmission by using a modified WLAN physical layer protocol; wherein, the modified WLAN physical layer protocol is synchronized, The channel codec and signal modulation and demodulation methods are the same as the wireless LAN physical layer protocol. According to a preferred embodiment of the present invention, the step of establishing a query and access procedure of the communication link is implemented by a signal modulation and demodulation method of the Bluetooth protocol.

According to another preferred embodiment of the present invention, the frame structure of the modified WLAN physical layer protocol has an access code and a packet header compatible with the Bluetooth standard for link control; and the step of data transmission includes : The access code and the packet header are transmitted through the signal modulation and demodulation method of the Bluetooth protocol; the data transmission is performed by the signal modulation and demodulation mode of the wireless local area network protocol.

According to still another preferred embodiment of the present invention, the step of data transmission is implemented by a signal modulation and demodulation method of a wireless local area network protocol.

The modified frame structure of the WLAN physical layer protocol has a cyclic redundancy check code for error checking during data transmission.

The frame length of the modified WLAN physical layer protocol is consistent with the slot structure of the existing Bluetooth standard.

In addition, the method adopts the Bluetooth standard frequency hopping mode in the Bluetooth signal modulation phase, and adopts a simplified frequency map in the WLAN signal modulation phase for coexistence and interference control of multiple wireless transceivers.

Among them, in the same wireless personal area network, the same time division multiplexing method as the existing Bluetooth is adopted to avoid interference between multiple nodes.

Among them, frequency division multiplexing and frequency hopping technology are used between different wireless personal area networks to avoid or reduce interference.

A wireless transceiver device for a high-throughput wireless personal area network, comprising an antenna unit, a radio frequency unit, a signal processing unit, a link control unit, and a link management unit, where the signal processing unit includes: a Bluetooth signal processing unit, configured to a Bluetooth radio frequency and baseband protocol establishing a query and access procedure of the communication link; and a modified wireless local area network signal processing unit for transmitting data by using a modified wireless local area network physical layer protocol; wherein the modified wireless local area network signal processing unit The processing includes synchronization, channel codec, and signal modulation and demodulation, and the processing is the same as the corresponding processing of the signal processing unit of the wireless local area network. The modified wireless local area network signal processing unit has an access code and a packet header compatible with the Bluetooth standard for link control.

The modified wireless local area network signal processing unit has a cyclic redundancy check code for error checking during data transmission.

The modified wireless local area network signal processing unit has a load length that is consistent with the time slot structure of the existing Bluetooth standard.

According to a preferred embodiment of the present invention, the antenna unit includes an antenna for receiving a wireless local area network signal or a Bluetooth signal, which is transmitted to a radio frequency unit or radiated into the air; the radio frequency unit and the antenna unit and the signal The processing unit is coupled to receive a wireless local area network signal or a Bluetooth signal of the antenna unit or the signal processing unit, and performs processing such as amplification, down conversion/upconversion, and filtering.

According to another preferred embodiment of the present invention, the antenna unit includes two antennas for respectively receiving a wireless local area network signal and a Bluetooth signal, and transmitting the signal to the radio frequency unit or radiating into the air; the radio frequency unit and the antenna unit and The signal processing unit is coupled to, comprising: a wireless local area network radio unit, configured to receive a wireless local area network signal of an antenna or a signal processing unit connected thereto, and perform amplification, down conversion/upconversion and filtering processing; and a Bluetooth radio frequency unit, A Bluetooth signal for receiving another antenna or signal processing unit connected thereto, and performing processing such as amplification, down conversion/upconversion, and filtering.

The preferred embodiment of the present invention adopts a physical layer channel coding and signal modulation method compatible with a wireless local area network, and a link control (LC: Link Controller), a link management (LM: Link Manager), and an upper layer protocol compatible with a Bluetooth network. A wireless transceiver device and a wireless communication method for a high-throughput wireless personal area network are proposed. With the device and method, the existing resources of the wireless local area network and the wireless communication network can be integrated, and no additional hardware is needed, or only a small amount of hardware needs to be changed to realize a high-throughput wireless personal area network.

DRAWINGS

1 is a protocol structure diagram of a high-throughput wireless personal area network according to a preferred embodiment of the present invention; 2 is a schematic structural diagram of a radio transceiver according to a preferred embodiment of the present invention; FIG. 3a is a basic frame format defined by the Bluetooth protocol in the prior art;

Figure 3b is another basic frame format stipulated by the Bluetooth protocol in the prior art;

3c is a frame format used by a high-throughput wireless personal area network according to a preferred embodiment of the present invention;

3d is another frame format adopted by a high-throughput wireless personal area network according to a preferred embodiment of the present invention;

4 is a flowchart of a wireless communication method according to a preferred embodiment of the present invention;

5a and 5b are flow diagrams of the wireless transceiver operating in the hybrid mode in the embodiment of FIG. 4;

6a and 6b are flowcharts showing the operation of the radio transceiver in the high throughput mode in the embodiment shown in Fig. 4.

detailed description

The core content of the present invention is: In a wireless communication device having both a wireless local area network and a Bluetooth function, appropriately modifying a link control and link management protocol of the Bluetooth and a corresponding unit for implementing link control and link management, making full use of the wireless local area network Physical layer resources, such as RF and baseband processing units, work with high-throughput, long-range/low-power wireless personal area networks in conjunction with Bluetooth high-level protocols running in host controllers.

A preferred embodiment of the present invention will now be described with reference to the protocol structure shown in FIG. The first thing to note is that Bluetooth and WLAN work mainly in the 2.4GHz industrial, scientific, medical (ISM) frequency band. In order to avoid mutual interference, the physical layer generally works in a time-sharing manner. In this way, Bluetooth can be used in wireless LAN. The physical layer resources of the wireless local area network are utilized during the work period. The present invention utilizes this point. As shown in FIG. 1, it is a protocol structure diagram of a high-throughput wireless personal area network according to a preferred embodiment of the present invention. Compared with the existing Bluetooth standard, the wireless personal area network Protocols above the Link Control Layer (LC) do not need to be modified except for the addition of corresponding features; Link Control Layer (LC) Hereinafter, the wireless personal area network establishes a high rate transmission chain All the processes before the road, including the Inquiry Procedures and Access Procedures, are implemented using the Baseband and Radio sections of the existing Bluetooth standard, such as Bluetooth 1.2. 2.0 or 2.1 protocol specification; and in the high-rate transmission process, the modified wireless local area network frame format and the wireless local area network physical layer are implemented. In this way, high-rate signal modulation and demodulation can be realized, thereby realizing a high-throughput, long-distance wireless personal area network.

On one hand, adding corresponding functions in the protocol above the link control layer (LC) includes: The application layer can add features for high-rate applications, such as digital television broadcasting, video conferencing, etc.; host control interface ( In HCI), a command interface for high-rate transmission applications can be added; a protocol supporting high-rate transmission can be added in the Link Management Protocol (LMP), and a high-speed transmission is added in Supported features. Features (features) parameters. This can be combined with the high-speed transmission function of the wireless transceiver. Of course, the present invention is not limited to the above several modes, and any function added/modified in the protocol above the link control layer for cooperation with high-speed transmission can be included in the protection of the present invention.

On the other hand, the modification of the WLAN physical layer/frame format includes: modifying the frame structure of the WLAN physical layer based on the physical layer of the high-throughput wireless personal area network, including the frame (Frame) The structure adds a packet header compatible with the existing Bluetooth standard for link control; adds a Cyclic Redundancy Check (CRC) code to the payload (Payload) for error in data transmission. Verify; modify the length of the load to match the existing Bluetooth time slot structure; and use a new frequency hopping mode for multiple high-rate wireless personal area network coexistence and interference control. The physical layer of the high-throughput wireless personal area network is basically the same as the WLAN physical layer, including synchronization, channel coding and decoding, and signal modulation/demodulation.

In other words, in the high-throughput wireless personal area network of a preferred embodiment of the present invention, in order to improve the transmission rate and be fully compatible with Bluetooth, three modes of signal modulation/demodulation and related frame structures can be adopted. Work, ie Bluetooth mode, mixed mode and high throughput (HT: High Throughput) mode. The Bluetooth mode completely adopts the signal modulation/demodulation method in the Bluetooth protocol. This mode can be used when establishing a link/hold link, because in actual use, the link/hold link is not too high for the rate; the hybrid mode is in the Access code and Packet header sections. Adopting the same signal modulation/demodulation method as the Bluetooth protocol, the data transmission part uses the same signal modulation/demodulation method as the wireless local area network, which improves the transmission rate to some extent; the high-throughput mode uses the wireless local area network completely. Signal modulation/demodulation mode for high-speed transmission of large data volumes.

Based on the above protocol structure and working mode, the high-throughput wireless personal area network uses the same bandwidth as the wireless local area network signal during high-rate transmission, such as 20MHz bandwidth in IEEE802.11g, but utilizes frequency hopping technology. All available ISM bands. In the same wireless personal area network, the same time division multiplexing method as the existing Bluetooth is used to avoid interference between multiple nodes; between different wireless personal area networks, frequency division multiplexing/frequency hopping technology is adopted to avoid/ Reduce interference. The high-throughput wireless personal area network can use the 2.4 GHz ISM band. If the WLAN physical layer used supports the 5 GHz band, it can also use the 5 GHz ISM band. That is, the high-throughput wireless personal area network can hop between four non-overlapping 20 MHz sub-bands in the 2.4 GHz ISM band, or 12 non-overlapping 20 MHz in the 5 GHz band. Frequency hopping between sub-bands improves the performance of multi-high-throughput wireless personal area network interference.

The wireless communication method and the wireless transceiver device of the high-throughput wireless personal area network of the present invention are further described by taking the WLAN physical layer of OFDM (Orthogonal Frequency Division Multiplex) modulation as an example with reference to the accompanying drawings. . Of course, the scope of protection of the present invention is not limited to this embodiment.

Referring to FIG. 1, a protocol structure of a high-throughput wireless personal area network according to a preferred embodiment of the present invention includes a physical layer, a link control layer (LC), a link management layer (LM), and a host controller interface layer ( HCI), Logical Link Control and Adaptation Layer (L2CAP), Serial Communication Protocol/Service Discovery Protocol Layer (RFCOMM/SDP), and Applications (Applications). As mentioned above, the protocol above the link control layer (LC) is the same as the Bluetooth protocol, and only needs to be modified. The physical layer has two protocols, namely, a radio frequency (Radio) and a baseband (Baseband) protocol. And modified WLAN physical layer protocol. * Please refer to FIG. 2, which is a schematic structural diagram of a wireless transceiver device according to a preferred embodiment of the present invention. As shown, the radio transceiver 20 includes an antenna unit 21 for receiving Bluetooth and wireless local area network signals from the air and sending them to the radio unit 22 for processing, receiving Bluetooth and wireless local area network signals from the radio unit 22, and radiating into the air; The radio frequency unit 22 is configured to receive the Bluetooth and wireless local area network radio frequency signals from the antenna unit 21, and perform amplification, down conversion, filtering, etc. processing on the signal, and then send the signal to the signal processing unit 23 to receive the signal from the signal processing unit 23. After filtering, amplification and up-conversion, etc., the modulation is applied to the carrier and sent to the antenna unit 21; the signal processing unit 23 is configured to process the intermediate frequency/baseband signal from the radio unit 22 to obtain link control information and data, according to the link control. The control information of the unit 24 processes the data to be transmitted into a baseband signal and sends it to the radio frequency unit; the link control (LC) unit 24 is configured to receive the management information and data of the link management unit 25, and control the signal processing according to the management information. The unit 23 processes the data, and receives the control information and data obtained by the signal processing unit 23, The signal processing unit 23 is further operated according to the control information, and sends the received data to the link management unit 25; and a link management (LM) unit 25 for receiving control commands and data of the host, and processing the data according to the host command. Then, it is sent to the link control unit 24, and receives the data of the link control unit 24 and processes it according to the link management protocol and then sends it to the host.

The transceiver 20 is coupled to the host via a Host Controller Interface (HCI) and implements a high throughput wireless personal area network function in conjunction with a higher layer protocol running on the host.

It should be noted that the signal processing unit 23 is composed of two units, one is a modified wireless local area network signal processing unit 231, and the other is a Bluetooth signal processing unit 232 for processing baseband/intermediate frequency signals of the wireless local area network and Bluetooth, respectively. In this embodiment of the present invention, the Bluetooth signal processing unit 232 is mainly used to establish a query and access process of the communication link, which can be implemented by a Bluetooth radio frequency and a baseband protocol; and the modified wireless local area network signal processing unit 231 adopts The same synchronization, channel codec, and signal modulation and demodulation processes of the WLAN are used for high-speed data transmission. In addition, due to the modified wireless local area network signal processing unit 231 Having a frame structure compatible with the Bluetooth standard packet header, the link can be easily controlled with a single ^'q capacity, so as to link control. In addition, the modified wireless local area network signal processing unit is also available

The cyclic redundancy check code is added to the load of the frame structure of 231, and is used for error check during data transmission. It can also be consistent with the existing Bluetooth time slot structure by modifying the length of the load.

The radio unit 22 is composed of a Bluetooth radio unit 221 and a radio local area network radio unit 222, which respectively process radio frequency signals of Bluetooth and wireless local area networks. The antenna unit 21 includes two antennas, which are respectively connected to the Bluetooth radio unit 221 and the wireless local area network radio unit 222, so as to respectively send the Bluetooth radio frequency signal and the wireless local area network radio signal received from the air to the Bluetooth radio unit and the wireless local area network radio unit for processing. Receive Bluetooth RF signals and wireless LAN RF signals from the Bluetooth RF unit and the wireless LAN RF unit and radiate into the air. The present invention is not limited to the above embodiment. In another possible embodiment, the wireless transceiver device can also use only one antenna and one radio frequency unit, that is, the modified wireless local area network signal processing unit and the Bluetooth signal processing unit share the same radio frequency unit. And connected to an antenna. Because wireless LAN and Bluetooth generally operate in the same 2.4 GHz ISM band, the same antenna and RF unit can be used to receive and process wireless LAN and Bluetooth signals. When the modified wireless local area network signal processing unit is working, the antenna receives the wireless local area network signal from the air and sends it to the radio frequency unit for down conversion, amplification, filtering, etc., and then sends it to the modified wireless local area network signal processing unit for processing, or the radio frequency unit receives the modification. The baseband signal of the WLAN signal processing unit is filtered, amplified and upconverted and sent to the antenna for radiation; when the Bluetooth signal processing unit is working, the antenna receives the Bluetooth signal from the air and sends it to the RF unit for down conversion. After processing, amplification and filtering are sent to the Bluetooth signal processing unit for processing, or the RF unit receives the baseband signal of the Bluetooth signal processing unit, and performs filtering, amplification, and up-conversion processing, and then sends the antenna to the air for radiation.

Next, the frame structure of the radio transceiver of this embodiment in different operating modes will be described. This embodiment still takes Orthogonal Frequency Division Multiplexing (WLAN) modulation as an example.

For the frame structure in Bluetooth mode, as shown in Figures 3a and 3b, it still uses the two basic formats specified by the Bluetooth protocol. But only Gaussian frequency shift keying (GFSK: Gaussian Frequency) Shift Keying) When the signal modulation mode is used, as shown in FIG. 3a, the frame structure mainly includes an access code (Access Code), a packet header (Packet Header), and a load (Payload) portion. When using DPSK (Differential Phase Shift Keying) modulation to transmit data, the frame structure includes Guard Time and the addition of the access code and the header portion of the Gaussian frequency shift keying modulation. Synchronous sequence, load and tailer sections of differential phase shift keying modulation.

For the frame structure in the mixed mode, as shown in Figure 3c, the front part is the access code and the packet header, which is the same as the Bluetooth protocol, using Gaussian frequency shift keying modulation; the latter part is high rate transmission. The segment includes a preamble (Preamble), a signal domain (SIGNAL), and a data field (DATA), and the definition is the same as the WLAN protocol using orthogonal frequency division multiplexing modulation, where the load (Payload) and the Bluetooth in the data domain The load definition in the protocol is the same, generally includes the payload body, the payload header, and the CRC. Here, please note that some types of packets may not contain a payload header or a CRC. The only difference from the Bluetooth protocol is that the payload header is only 8 bits, where the length is reserved and not defined, and the payload length in the Bluetooth protocol is determined by the LENGTH field in the signal domain. In addition, an appropriate length of guard interval (Guard Time) can be inserted between the orthogonal frequency division multiplexed signal segment and the Gaussian frequency shift keying signal segment for frequency switching and the like.

For the frame structure in high throughput mode, as shown in Figure 3d, the definitions of the preamble, signal domain and data domain are the same as those of the WLAN protocol using orthogonal frequency division multiplexing modulation. The payload and graph in the data domain. The definition in 3c is the same; the definition of the header is shown in Figure 3d, including 3-bit logical transport address (LT-ADDR: Logical Transport Address), 4-bit packet type (Type), 1-bit stream control (Flow), The 1-bit transmission acknowledgement flag (ARQN), the 1-bit sequence number (SEQN), the 8-bit header error check bit (HEC: header error check), and the 6-bit suffix are encoded and modulated in the same manner as the signal domain.

In addition, in the embodiment, regarding the frequency hopping mode, the frequency hopping mode in the Bluetooth standard is adopted in the modulation phase of the Gaussian frequency shift keying or the differential phase shift keying signal, including the adaptive frequency hopping mode; The segment uses a simplified frequency hopping method, which selects the frequency method and Bluetooth. The agreement is the same, except that the WLAN signal segment uses a simplified frequency map. For example, only the center frequency of four 20MHz subbands in the 2.4GHz ISM band, /=2412 + k ' 20J Z (k= , ..., 3 ); and if the WLAN RF module and antenna support the 5GHz band, It can also contain the center frequencies of 12 20MHz subbands in the 5GHz band, /=5180 +k - 20MHZ = 0, ..., 7 ) and /= 5745 + ' 20^^ (k=0, 3 ).

The operation of the transceiver device according to a preferred embodiment of the present invention, that is, the wireless communication method of the present invention will be described below with reference to the flow shown in FIG.

Step 400: Establish a link between two wireless transceivers;

Since the establishment of the link does not require an excessively high rate, the process can be established in the same manner as the Bluetooth protocol, that is, the first Bluetooth mode described above is adopted, and the link mainly includes two types, that is, synchronous connection-oriented (SCO: Synchronous Connection). -Oriented) and Asynchronous Connection-Less. Of course, the present invention is not limited thereto. The establishment of the link does not have to adopt the same method as the Bluetooth protocol, and the link is not limited to the above two types, but depends on actual needs.

Step 402: When a large amount of data needs to be transmitted, the data is transmitted by using a hybrid mode or a high throughput mode through link management protocol negotiation;

Step 404: Enter mixed mode or high throughput mode to transmit data.

Step 406: When a large amount of data transmission ends, only a small amount of data transmission or only need to maintain the link, the hybrid mode or the high throughput mode is exited through the link management protocol negotiation;

Step 408: Enter the Bluetooth mode, keep the link, transmit a small amount of data or listen mode, which is convenient to save power.

Wherein, in step 404, if the data is transmitted in the mixed mode, that is, in the mixed mode (please refer to FIG. 3c at the same time), then - in the transmitting process, please refer to FIG. 5a, the transmitter first transmits according to the Bluetooth protocol. a code and a packet header (step 500); transmitting a preamble and a signal domain according to a WLAN based on orthogonal frequency division multiplexing modulation (step 502), wherein a LENGTH field in the signal domain specifies the load The data length; according to the Bluetooth protocol, the data to be transmitted (including the 8 bits of the payload header, wherein the length is an undefined reserved field) is followed by a CRC check code, encryption and whitening, thereby producing a Bluetooth protocol consistent with Load (step 504), wherein the CRC check code and the encryption process are optional; then, the WLAN according to the orthogonal frequency division multiplexing modulation is used to load the 16-bit service domain before the load, and sequentially after the load 6 bits of Tail and appropriate Pad bits, thereby generating a data field consistent with the WLAN protocol (step 506); finally, encoding the data field according to the WLAN protocol, orthogonal frequency division multiplexing modulation and transmission (step 508) . In the Gaussian frequency shift keying signal segment, frequency hopping consistent with the Bluetooth protocol is used, and in the orthogonal frequency division multiplexing modulation section, switching to the frequency used for the frequency division multiplexing or simplifying the frequency mapped by the frequency hopping mode; The time slot allocation and timing are implemented according to the Bluetooth protocol, that is, only l-slot with a length of 625 microseconds (us), a 3-slot of 1875us or a 5-slot time slot allocation method of 3125 us.

In the receiving process, referring to FIG. 5b, the receiver first performs synchronization and unpacking according to the Bluetooth protocol, and passes the synchronization and packet header information to the link control unit for processing (step 510); and then invokes the WLAN physical layer processing unit according to the WLAN protocol. Receiving signals, including down-conversion, amplification, filtering, AGC, sampling, synchronization, channel estimation, orthogonal frequency division multiplexing demodulation and decoding, and obtaining load data (step 512); then, solving according to the Bluetooth protocol Processing such as whitening, decryption, and CRC check (step 514); Finally, the obtained data is transmitted to the Bluetooth upper layer protocol for further processing (step 516).

Wherein, in step 404, if it is working in the high throughput mode, please refer to FIG. 3d at the same time. In the process of transmitting, referring to FIG. 6a, the transmitter first transmits a preamble according to the WLAN protocol (step 600); generates a packet header according to the Bluetooth protocol, adds 6 bits Tail, and encodes and encodes the packet header according to the same method of the wireless local area network protocol SIGNAL. The frequency division multiplexing modulation is performed (step 602); and the signal domain (SIGNAL Field) and the data field (DATA Field) are sequentially transmitted (step 604), wherein the signal domain and the data domain are generated in the same manner as in the hybrid mode, and frequency hopping is performed. The mode, the time slot allocation, and the timing method are also the same as those in the hybrid mode, and are not described here.

In the receiving process, please refer to Figure 6b. According to the Bluetooth time slot and timing, the receiver call is based on The WLAN physical layer unit of the orthogonal frequency division multiplexing modulation first performs processing such as down-conversion, amplification, filtering, AGC, sampling, synchronization, and channel estimation on the received signal (step 610); demodulation by the same method as the SIGNAL method The information in the out packet header is processed by the link control unit (step 612); the signal domain and the data domain data are respectively decoded according to the wireless local area network protocol, and the load data is obtained (step 614); then, the whitening is performed according to the Bluetooth protocol. Processing such as decryption and CRC check (step 616); finally, the obtained data is transmitted to the Bluetooth upper layer protocol for further processing (step 618).

It should be noted that the foregoing is merely illustrative, and is not intended to limit the present invention. With the development of wireless network technologies, a wider bandwidth or multiple antennas may be considered in the future, for example, using 802.11 η, using 40 MHz bandwidth or more. Multiple input multiple output (MIMO) is used to achieve higher data rates.

In summary, the high-throughput wireless personal area network is a wireless network technology that uses the upper layer protocol shared with Bluetooth and shares the physical layer resources with the wireless local area network to achieve high throughput. The following benefits have been achieved:

1. Through the wireless transceiver device, even if the host only installs the Bluetooth high-level protocol without the high-level protocol of the wireless local area network, high-speed, long-distance/low-power data can be realized with other devices on which the device is installed. Transmission

2. The existing wireless LAN device can implement a high-speed, long-distance wireless personal area network together with the host with the Bluetooth high-level protocol after a few modifications;

3. In the process of establishing and maintaining the wireless personal area network connection, the Bluetooth physical layer and the MAC layer are used, which can greatly reduce the power consumption compared with the wireless local area network; when transmitting data, the physical layer of the wireless local area network is used, as opposed to The existing Bluetooth physical layer can greatly increase the transmission rate.

In summary, the present invention can take advantage of proven Bluetooth and wireless LAN technologies, as well as existing hardware/software resources to provide higher speed wireless personal area network services while significantly reducing power consumption while establishing and maintaining links. It also speeds development of related devices and equipment while reducing development, production and testing costs.

Claims

Claim

A wireless communication method for a high-throughput wireless personal area network, characterized in that: the method uses link control, link management, and upper layer protocol compatible with a Bluetooth network, and uses a physical layer channel compatible with a wireless local area network. Encoding and signal modulation for data transmission.

2. The method according to claim 1, characterized in that the method comprises the steps of: establishing a query and access procedure of a communication link by using a Bluetooth radio frequency and a baseband protocol;

Data transmission by modified WLAN physical layer protocol;

The modified WLAN physical layer protocol synchronization, channel codec, and signal modulation and demodulation modes are the same as the WLAN physical layer protocol.

3. The method according to claim 2, wherein the step of establishing a query and access procedure of the communication link is implemented by a signal modulation and demodulation method of the Bluetooth protocol.

The method according to claim 2, wherein the frame structure of the modified WLAN physical layer protocol has an access code and a packet header compatible with the Bluetooth standard, and is used for link control; The steps of transmission include:

Sending an access code and a packet header through a signal modulation and demodulation method of the Bluetooth protocol;

Data transmission is performed by a signal modulation and demodulation method of a wireless local area network protocol.

5. The method according to claim 2, wherein the step of data transmission is implemented by a signal modulation and demodulation method of a wireless local area network protocol.

The method according to claim 4 or 5, wherein the modified frame structure of the WLAN physical layer protocol has a cyclic redundancy check code for error checking during data transmission.

The method according to claim 4 or 5, characterized in that the payload length of the frame structure of the modified WLAN physical layer protocol is consistent with the slot structure of the existing Bluetooth standard.

8. Method according to claim 2, characterized in that the method is modulated in Bluetooth signal The phase adopts the Bluetooth standard frequency hopping mode, and uses a simplified frequency map in the wireless LAN signal modulation phase for coexistence and interference control of multiple wireless transceivers.

9. The method according to claim 8, wherein in the same wireless personal area network, the same time division multiplexing mode as the existing Bluetooth is used to avoid interference between multiple nodes.

10. The method according to claim 8, wherein the frequency division multiplexing mode and the frequency hopping technology are used to work between different wireless personal area networks to avoid or reduce interference.

A radio transceiver device for a high-throughput wireless personal area network, comprising an antenna unit, a radio frequency unit, a signal processing unit, a link control unit, and a link management unit, wherein: the signal processing unit comprises: a Bluetooth signal a processing unit, configured to establish a communication link query and access procedure by using a Bluetooth radio frequency and a baseband protocol; and a modified wireless local area network signal processing unit, configured to perform data transmission by using a modified wireless local area network physical layer protocol;

The modified WLAN signal processing unit includes synchronization, channel coding and decoding, and signal modulation and demodulation processing, and the processing procedure is the same as that of the signal processing unit of the WLAN.

12. The apparatus according to claim 11, wherein the modified wireless local area network signal processing unit has an access code and a packet header compatible with the Bluetooth standard for link control.

13. The apparatus according to claim 11, wherein the modified wireless local area network signal processing unit has a cyclic redundancy check code for error checking during data transmission.

14. The apparatus according to claim 11, wherein the modified wireless local area network signal processing unit has a load length that is consistent with a slot structure of an existing Bluetooth standard.

The device according to claim 11, wherein the antenna unit comprises an antenna for receiving a wireless local area network signal or a Bluetooth signal, and transmitting the signal to a radio frequency unit or radiating into the air; the radio frequency unit and the antenna The unit and the signal processing unit are coupled to receive a wireless local area network signal or a Bluetooth signal of the antenna unit or the signal processing unit, and perform amplification, down conversion/upconversion, and filtering processing.

16. Apparatus according to claim 11 wherein - The antenna unit includes two antennas for respectively receiving a wireless local area network signal and a Bluetooth signal, transmitting to the radio frequency unit or radiating into the air;

The radio frequency unit is coupled to the antenna unit and the signal processing unit, and includes: a wireless local area network radio unit, configured to receive a wireless local area network signal of an antenna or a signal processing unit connected thereto, and perform amplification, down conversion/on Frequency conversion and filtering processing; and a Bluetooth radio unit for receiving a Bluetooth signal of another antenna or signal processing unit connected thereto, and performing amplification, down conversion/upconversion, and filtering processing.