CN1909397A - Communication modular between mobile terminals based on Blue Tooth technology - Google Patents
Communication modular between mobile terminals based on Blue Tooth technology Download PDFInfo
- Publication number
- CN1909397A CN1909397A CN200610036844.7A CN200610036844A CN1909397A CN 1909397 A CN1909397 A CN 1909397A CN 200610036844 A CN200610036844 A CN 200610036844A CN 1909397 A CN1909397 A CN 1909397A
- Authority
- CN
- China
- Prior art keywords
- data
- bluetooth
- bnep
- ber
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000006854 communication Effects 0.000 title claims abstract description 39
- 238000004891 communication Methods 0.000 title claims abstract description 36
- 238000005516 engineering process Methods 0.000 title claims description 32
- 230000005540 biological transmission Effects 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 22
- 238000013461 design Methods 0.000 claims abstract description 15
- 238000012546 transfer Methods 0.000 claims description 36
- 230000006978 adaptation Effects 0.000 claims description 7
- 230000009467 reduction Effects 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 6
- 238000005538 encapsulation Methods 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000013507 mapping Methods 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 230000006870 function Effects 0.000 description 12
- 230000004927 fusion Effects 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 239000000047 product Substances 0.000 description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- 238000011161 development Methods 0.000 description 6
- 230000006855 networking Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000007799 cork Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000013456 study Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention relates to a mobile terminal communication terminal based on blue-tooth technique, wherein said invention uses the blue-tooth data transmission algorism based on BER mode, the blue-tooth network module design based on BNEP and blue-tooth wireless access method based on BNEP; said transmission algorism is a self-adaptive data transmission algorism based on the data transmission in different bit error rate of blue-tooth network; said blue-tooth module comprises: baseband protocol, chain manage protocol, a logic chain control-adapt protocol, a service discover protocol, RF circuit module describe module, chain control module, signal power match module, noise-reduce technique and blue-tooth application protocol stack. The invention can realize high stability and reliability.
Description
Technical field
The present invention relates to a kind ofly, specifically, related to short-distance wireless communication technology between a kind of portable terminal based on communication module between the portable terminal of Bluetooth technology.
Background technology
1, moves the fusion of using with digital home
Computer has experienced an evolution fast since being born from nineteen forty-six, and the volume of computer is constantly dwindled, and price constantly reduces, and computing capability then improves constantly, and finally causes computer constantly popular, enters family or appears in the pocket.
Current computer just strides forward towards popularizing the direction of calculating.The user can be at any time and is visited Anywhere and operation information, it is omnipresent that computing equipment also becomes, desktop system is not only all arranged everywhere, and non-PC equipment (speech ciphering equipment, long-range input equipment and the intelligent monitoring device of the display device of set-top box, visual telephone, networking, network shooting equipment, networking) also moves towards main flow market just gradually.And popular gradually along with home network and wireless network makes network also become more and more universal.Because the user will become gradually and move, calculating will no longer be confined to desktop system.The user will need dynamically to visit computing equipment and software service in moving process, and will utilize the computational resource that obtains to carry out calculation task, as write document, reading Email, acquisition information and visit information etc.
Portable terminal is an important content of popularizing computing terminal, and the progress of mobile communication technology provides wide space for the development and the application of portable terminal.Raising along with the cordless communication network transmission rate, the new wireless application that comprises multimedia, color animation and Mobile business etc. will propose higher requirement to portable terminal, make portable terminal develop into communication service gradually based on data from communication service based on speech is provided, and to people's work, life with communicate by letter and produce great influence.
Move the fusion of using two big technological trends are arranged with digital home: the firstth, the fusion of service application is merged and logic fusion dual mode comprising physics.The former refers to that more and more different products application all can merge, as the fusion with mobile phone such as camera, MP3, Nokia thinks that next step of digital convergence will be integrated together portable terminal, the Internet, static state and video capture, music, Email even more contents; Logic merges and to be meant that PC, portable terminal, game station etc. combine and to become " a logical terminal (LTERM) equipment " that its difference in functionality has different usages with mode according to different occasions and place.Second trend is the fusion of network interconnection technology, comprises fixing and the fusion of moving, wired and wireless fusion and fusion of circuit and grouping or the like.Portable terminal has adapted to the needs that calculate development, and its application will be along with the communication technology and other development of technologies and huge business opportunity is being bred in the different social sectors that deepen continuously, and has vast potential for future development.
2, the multiport family device promotes the development in portable terminal of future generation market
The three port family device fields of integrating speech, multimedia and data processing are in the flourish stage at present, and increasing company pays close attention to and sets foot in this class and uses.New family device provides desirable solution for design, production high-end wireless phone of future generation, and its principal character is to support non-cellular radio data to connect, and comprises Wi-Fi, DMB (DMB) standard.In the Asian-Pacific area, the satellite dmb technology is the focal issue of mobile broadcast form of future generation, and this service can obtain everywhere by the automobile or the receiver of handheld terminal, and there are the tremendous growth potentiality in this field in Chinese market.
Can be simultaneously from three port access references to storage of device, three port devices can be to be provided between application program or three intelligent devices such as baseband processor, DMB processor or 802.11 processors at a high speed, bidirectional interface, the packing of the renewal that this device series adopts, with and low-power consumption and high performance feature make it can better adapt to the application that space and power are restricted.Can realize pin compatibility between the device that the different voltages of this series are selected,,, finally shorten the design cycle as far as possible and reduce the time that comes into the market, thereby realize the maximization of rate of return on investment to support high module device for the designer provides necessary function.Pin compatibility helps the development of high module device, and the different voltages that also can help the designer to use three port devices to insert in before future wider scope are used and baseband processor, and does not need the conversion of voltage.
3, Related product and patent
In recent years, personal digital assistant device products such as smart mobile phone, MP3 and MP4 player become more and more popular, can either can weave digital living rich and varied by other device talks in interconnection technique and the home network again for the consumer provides high-quality seeing and hearing enjoyment.
Along with mobile communications network and end product to 2.5G and 3G evolution, core business turns to the multi-medium data business from voice service gradually, market will increase year by year to the demand of intelligent multimedia mobile phone, and will enter one and grow continuously and fast the phase.Main both at home and abroad portable terminal manufacturer such as TCL, waveguide, Sony-Ericson, Nokia and Motorola etc. have all strengthened the input in smart mobile phone market, have developed refreshing allusion quotation E767, P908,6600 and product such as A760.Motorola is making great efforts to allow mobile phone become the center of family, and many products of being used of release and mobile phone.Comprising allowing mobile phone answer the mobile phone dedicated support of the phone of calling in from family's fixed line circuit, the software of the Long-distance Control constant temperature automatic regulator that can handle by mobile phone also is provided in addition, the PTT technology of Motorola can help the user to pass through by a key at GPRS, realize freely switching on CDMA2000 and the Wi-Fi network, Motorola has also developed MPX220 and the MPX mobile phone that can realize like a cork with PC intelligent link, resource-sharing and collaborative work.
The MP4 player has appearred in the market, also be PMP (Portable Media Player, portable electronic device) or PVP (Personal Video Player, personal video player), it has used the more audio/video encoding/decoding technology of high compression ratio, can play-over high-quality video, audio frequency, also can browsing pictures and use as portable hard drive.Microsoft proposes the PMC standard on the MP4 basis, Intel is that its high-end PXA270 solution is released video speed-up chip 2700G, solved the decoding capability defective of PXA270 on the large scale video format, AMD also releases the core processor AU1200 that customizes for the MP4 product at the beginning of 2005.Along with popularizing of MP4 player, it will replace the dominant position of present MP3.But at present domestic research in this field seldom, and to the elaboration of this technology and few, our research can well replenish the patent blank in patent retrieval.
Summary of the invention
The present invention has overcome the deficiencies in the prior art part, has proposed a kind ofly based on communication module between the portable terminal of Bluetooth technology, making between portable terminal communication have more high-performance, more high stability, high reliability more.
The present invention is main adopts bluetooth network transfer of data algorithm based on the BER pattern, based on the blueteeth network modular design of BNEP with based on the blue teeth wireless access way of BNEP.
Described bluetooth network transfer of data algorithm based on the BER pattern is to analyze bluetooth network at different bit error rate (BER, Bit Error Rate) on the transfer of data situation basis under the mode condition, a kind of self-adapting data transmission algorithm of the blueteeth network based on physical link layer BER pattern is proposed, part has solved link utilization problem on the low side in the actual data transfer process, is used for improving the efficient of actual data transfer.
Described Bluetooth ACL packet data package is divided into middle data rate type (DM, Data Medium) and high data rate type (DH, Data High).
Described self-adapting data transmission algorithm key step comprises:
1) adopt Get_Link_Quality () function to obtain BER current state value;
2) add up interior average BER situation of this section period;
3) carry out the analysis of statistics, and adjust transmission means;
If BER＜0.0001529 then selects for use the DH5 mode to carry out transfer of data;
If 0.0001529＜-BER＜0.0060795, then select for use the DH3 mode to carry out transfer of data;
If 0.0060795-＜BER＜0.0157813 then selects for use the DH1 mode to carry out transfer of data;
If 0.0157813＜-BER, then select for use the DM1 mode to carry out transfer of data;
4) return 1) continue the statistics of timing next time and adjust transmission mode.
Need not insert PPP and RFCOMM layer again between network layer and the L2CAP in the described blueteeth network module wireless access way, and finish mapping from the IP layer to the L2CAP layer by BNEP.
The mm of described bluetooth network encapsulation protocol BNEP payload section is decided to be 1691 bytes, and the BNEP head length is at least 1 byte, the concrete form of BNEP packet (BNEP type field, extension flag position E, extended head content, BNEP payload).
Described bluetooth module comprises base band (Baseband) agreement, link management layer protocol (LMP), logical link control and adaptation protocol (L2CAP) and service discovery protocol (SDP), the description of RF circuit module, controlling links and signal power matching module, noise reduction technology and bluetooth applications protocol stack.
Described RF circuit module adopts the pcb board wiring technique of high frequency characteristics, coordinates in conjunction with the circuit high frequency performance of master-plan layout and device, reduces between each RF device and the interference of the electromagnetic signal between the circuit.
Described noise reduction technology adopts the high-frequency signal that reduces between the inside modules wiring route to disturb, and introduces the noise adaptation mechanism is in time adjusted noise according to external environment filtration matching factor.
Description of drawings
Fig. 1 is the blue teeth wireless access way structure chart based on BNEP;
Fig. 2 is a BNEP data packet format structure chart;
Fig. 3 is a blueteeth network module basic block diagram;
Fig. 4 is the protocol communication structure chart.
Embodiment
The present invention is main adopts bluetooth network transfer of data algorithm based on the BER pattern, based on the blueteeth network modular design of BNEP with based on the blue teeth wireless access way of BNEP.
1, based on the bluetooth network transfer of data algorithm of BER pattern
In numerous strategy studys in the past, all be based under the assumed condition that makes full use of link and carry out raising bluetooth actual data transfer rate, but on the low side because of link utilization in the actual data transfer, be difficult in actual environment, simulate.A kind of several propagation algorithms have been adopted in this modular design process based on the BER pattern, part has solved link utilization problem on the low side in the actual data transfer process, this bluetooth module in design is a pith, is used for improving the efficient of actual data transfer.
This algorithm is to analyze bluetooth network on the transfer of data situation basis under different bit error rates (BER, the Bit Error Rate) mode condition, proposes a kind of self-adapting data transmission algorithm of the blueteeth network based on physical link layer BER pattern.According to the ACL grouping of bluetooth network packet, carried out the transfer of data experiment in different B ER mode condition, interpretation shows that algorithm can significantly improve the bluetooth network data transmission efficiency.
Adopt bit error rate (BER.Bit Error Rate) to be described the quality of transmission in the transfer of data of bluetooth applications, the error rate is high more in the big more expression communication process of BER value.The transfer of data algorithm that adopts in the current bluetooth applications for simplifying the connection management of bluetooth network, is not considered the variation of BER in the concrete communication link, all adopts single isl frame mode in whole transmission course, causes efficiency of transmission not high.
In actual communication process because the noise effect of surrounding enviroment, make adopting single slotted mode carry out the effect that data communication obtains not is optimum, if adopt the BER parametric description when the external environment variation, and dynamically select the data of different types bag for use according to the BER parameter, can improve the situation that when environmental change is violent, causes transfer of data to decline to a great extent.
In the Bluetooth protocol standard, point out to obtain current link communication quality information by calling the Get_Link_Quality function, its value scope is between 0-255, it is good more to be worth big more expression channel quality, and the standard that allows self-defined measurement link-quality is mapped to it on the numerical value between the 0-255.
Based on CSR chip data analog result, the BER mode division can be become four and distinguish section, in carrying out data transmission procedure,, select for use preferably frame pattern to carry out transfer of data according to the link communication quality situation of accumulative total in a period of time by detecting real-time to the link communication quality.
The Bluetooth ACL packet data package is divided into middle data rate type (DM, Data Medium) and high data rate type (DH, Data High).The DH bag uses less error correcting to obtain the higher data transfer rate.
In a single time slot bag, need to transmit 72bit piconet access code and 54bit packet header, and the guard band that needs a 220Ws between bag and the bag, therefore, the data transmission rate that is obtained on the wave point of actual transmissions is much smaller than the original data transmissions rate 1Mbps of maximum.
A kind of self-adapting data transmission algorithm that the present invention proposes based on the BER pattern, its step is as follows:
1) adopt Get_Link_Quality () function to obtain BER current state value.
2) add up interior average BER situation of this section period.
3) carry out the analysis of statistics, and adjust transmission means:
If BER＜0.0001529 then selects for use the DH5 mode to carry out transfer of data;
If 0.0001529＜-BER＜0.0060795, then select for use the DH3 mode to carry out transfer of data;
If 0.0060795-＜BER＜0.0157813 then selects for use the DH1 mode to carry out transfer of data;
If 0.0157813＜-BER, then select for use the DM1 mode to carry out transfer of data.
4) return 1) continue the statistics of timing next time and adjust transmission mode.
When worst case occurring, then adopt the packet of crack the most in short-term of DMI mode band FEC error correction to carry out transfer of data in algorithm, all the other adopt the DHI that does not have the FEC error correction at a high speed, DH3, and the DH5 mode is carried out transfer of data.
2, based on the blueteeth network modular design of BNEP
Blueteeth network module basic structure as shown in Figure 3, the key technology of bluetooth module is a multinomial Bluetooth function expansion technique (BlueFaex), and the present invention mainly comprises the innovation of four aspects: the bluetooth applications protocol stack of high-frequency circuit designing technique, controlling links and power match technology, noise reduction technology, innovation.
Be described below with regard to each several part below:
(1) the RF circuit module is described
Adopt the pcb board wiring technique of high frequency characteristics, circuit high frequency performance in conjunction with master-plan layout and device is coordinated, reduce between each RF device and the interference of the electromagnetic signal between the circuit, in the big small size of identical design module, by RF circuit optimization technology, improve the high-frequency electromagnetic performance of circuit.Because the high-frequency RF circuit requires height to designing technique and design experiences, improve RF circuit performance one to being the difficult problem that a communication products manufacturer is faced, this bluetooth module is the bluetooth module that a design objective reaches 96dB.
(2) controlling links and signal power matching module are described
Bluetooth module is in the data radio communication process, the signal of communicating pair is by special control function module controlling links, according to the signal power, the outside noise situation that change at any time, by adjusting and improve signal transmitting and receiving both sides power match, improve the signal controlling coordination ability of data link management layer (Link Manager), be upper layer application protocol, reliable high-performance expansion interface ability is provided, make the intercommunication signal in time be adjusted into the best communications status, the communication capacity that improves module is played an important role.
(3) noise reduction technology is described
In the design of IC chip periphery circuit, the high-frequency signal that as far as possible reduces between the inside modules wiring route disturbs, introduce the noise adaptation mechanism and in time adjust the filtration matching factor of noise, reach the reduction signal noise, improve the effect of communication quality according to external environment.
(4) the bluetooth applications protocol stack is described
According to the requirement of conceptual design, bluetooth protocol repertory has been done application corresponding design and setting, satisfy the requirement of remote, big data on flows communication, the range of application that makes bluetooth is by closely expanding bigger moving range to.
(5) base band (Baseband) protocol description
Baseband layer determines and has showed the air interface of bluetooth.It has defined process that equipment room searches mutually and the mode that connects, baseband layer has been device definition principal and subordinate role.Base band has also defined the pertinent regulations that how to form employed frequency hop sequences of communication equipment and the shared air interface of several equipment, these regulations are based on time division duplex, adopted packet-based polling mode, simultaneously, it has also further defined mode synchronous and the shared air interface of asynchronous service.
(6) link management layer protocol (LMP) is described
The performance that link manager in each equipment can access by link manager protocol and bluetooth air interface negotiation, these performances are included as the bandwidth of supporting the needed grade of service of data service and distributing, and the periodicity bandwidth reserved for supporting that audio service obtains, LMP is responsible for establishment of connection between the bluetooth equipment.Bluetooth equipment is in transmission during data, and LMP will hold consultation and controls the size of packet, and LMP is the consumption of managing power and the state of control bluetooth equipment also.Last function of LMP is to produce authentication and encrypt required key.
(7) logical link control and adaptation protocol (L2CAP) is described
The business of using from data at first will be passed to the logical link control and adaptation protocol layer, the L2CAP layer is for using the details that has shielded lower floor's host-host protocol with more high-rise agreement, high-rise so just needn't understand occur in wireless and frequency hopping baseband layer, do not need to know the particular packet form that on bluetooth air interface, transmits yet.L2CAP supported protocol multiplexed, allow various protocols and use shared air interface, the little grouping that it can also become base band to transmit the big packet fragmentation that high level uses, and in accepting device, finish respective sets process of assembling to these groupings, in addition, the L2CAP layer is also supported group management function, also will exchange the information aspect the QoS in the L2CAP layer.
(8) service discovery protocol (SDP) is described
Service is played crucial effects in the Bluetooth technology framework, it is the basis of all user models.In changing frequent Bluetooth wireless communication network, any two or a plurality of equipment may begin suddenly to communicate by letter on the link of bluetooth, if utilize these equipment that service is provided each other, need one more flexibly method search the position of these services, in case set up an one communication channel, next step of certain devices communicating should be to find out the operable service of this equipment.SDP has defined a kind of method of standard, so that the service that miscellaneous equipment provides can be found and learn to some bluetooth equipment.The bluetooth service discovery protocol specialized designs is used for the environment of Bluetooth wireless communication, can realize its function in efficient and optimum mode.
3, the blue teeth wireless access way of BNEP
This network struction model as shown in Figure 1, bluetooth network encapsulation protocol BNEP is the brand-new application protocol that bluetooth SIG tissue proposes, it provides the another kind of application model that makes up the blue teeth wireless local area network (LAN), in this solution, need not insert PPP and RFCOMM layer again between network layer and the L2CAP, and finish mapping from the IP layer to the L2CAP layer by BNEP.
The mm of BNEP payload section is decided to be 1691 bytes, can guarantee the disposable transmission of the ether layer data bag that network layer sends so downwards, the parcel that uses B.FCOMM then upper strata PPP information bag must be divided into 127 bytes sends to the L2CAP layer again, and this transfer capability to the HCI layer causes waste.Use BNEP can reduce the complexity of protocol encapsulation, this network struction scheme can improve the communication usefulness of wireless network effectively.
BNEP not only is the data channel between IP layer and the L2CAP, and it can directly send control command to the L2CAP layer, realizes the networking function of bluetooth equipment in this way.Aspect data passes, BNEP directly receives the Ethernet data bag that sends under the IP course, and the Ethernet payload district is directly copied to the BNEP payload section, adds that the BNEP head sends to the L2CAP layer afterwards.The BNEP head length is at least 1 byte, and the concrete form of BNEP packet as shown in Figure 2.
Wherein the BNEP type field is one 7 a binary number, if the scope of numerical value puts 1 from 0x00 to Ox7FE extension flag position E, then be illustrated between BNEP head and the BNEP payload and also have BNEP extended head field,, represent that then payload closelys follow after the BNEP head if extension flag position E puts.
Below in conjunction with the structure of this bluetooth module, one of them embodiment of description of drawings.
Network access point NAP (Networking Access Point) provides the Ethernet data bag to transmit service and external network access service for all users in the net of individual territory, therefore NAP can be counted as bridge or the gateway with Bluetooth function, powerful NAP even can be the router of supporting bluetooth equipment, the function of being supported of NAP should meet the 802.1d standard.
Group network GN (Group Ad-hoc Networking) the access service of being responsible for transmitting PAN user's data bag and external network not being provided, therefore on protocol architecture, GN is identical with PAN user.
GN is designed to allow one or more bluetooth equipments to form a LAN, and NAP provides bluetooth equipment to enter the ability of Internet network.Be that NAP or GN must provide the seamless realization with TCP/IP and other procotol.
The protocol communication structure is as shown in Figure 4:
(1) initialization NAP/GN service
In the initialization procedure of NAP, must at first in service discovery database SDD, register the various services that NAP supported, after this, the packet filtering database PFD of the necessary initialization oneself of NAP, if necessary, NAP also answers the network security database of initialization oneself, deposits authentication pattern, encryption mode and each user's of PAN of NAP information such as access rights, access key in this database.
(2) set up the NAP/GN service
PAN user sends to whole radio frequency coverage by IiCI instruction and connects Inquiry, generates NAP according to the response PAN user of each NAP and supports agent list.Management entity ME is responsible for controlling the initialization that NAP/GN connects, the detailed process of authentication and encryption should be returned between the IMPSETUP complete signaling and carry out creating link KEY value and NAP, according to the service that the user selectes, PAN user begins to N from the top of table " send L2CAP ConnectReq request.
If the link setup failure, then the next NAP in table sends request, and the opposite end differentiates whether have a BNEP link each other, if answer certainly, is then refused the link setup request, send L2CAP ConnectRspNeg, otherwise send L2CAP ConnectRsp, the beginning link configuration.In the process of L2CAP link establishment, both sides consult the MTU value of BNEP link, and this value must not be less than 1691.
If NAP is operated in the authentication pattern, then differentiate opposite end PAN user's authority; If be operated in authentication/licensing mode, then when differentiating the PAN user right, revise user's associated rights as required, service connects to set up to be finished.
(3) grouping between NAP/GN and PAN user transmits
The grouping of each ether is packed advances the BNEP packet, and the lotus of earning as L2CAP transmits between bluetooth equipment then, if NAP/GN is operated in PAN encryption mode 2, then each packet is encrypted at the BNEP layer or at baseband layer.
(4) pathfinding and the forwarding of NAP/GN grouping
This part of module is responsible for realizing filtration, pathfinding and the forwarding of BNEP packet.In concrete realization, this module can be realized by iptables, iptables is that the packet filtering/forwarding instrument BNEP that is operated in network layer peels off the BNEP head of packet, whether what be submitted to iptables is the ether formatted data bag of standard, transmitted according to the purpose IP address decision of packet by iptables.
(5) NAP/GN's tears chain open
Normally tear the either party that chain process should be link open and notify the BNEP layer to tear chain open, send L2CAPDisconnectReq simultaneously, but the failure of BNEP link setup, NAP/GN service support make mistakes, authentication/abnormal conditions such as Authorized operation failure all can cause the chain rupture of link.
(6) management information bank of NAP
On network management problem, bluetooth NAP uses SNMP to realize the management of a bluetooth territory net device node that oneself is considered as on the Internet, and NAP or GN can select whether to support the MIB of oneself, if select to support the MIB function, then mark according to bluetooth.
Claims (8)
1, a kind of based on communication module between the portable terminal of Bluetooth technology, it is characterized in that its adopt bluetooth network transfer of data algorithm based on the BER pattern, based on the blueteeth network modular design of BNEP with based on the blue teeth wireless access way of BNEP:
The transfer of data algorithm steps comprises:
1) adopt Get_Link_Quality () function to obtain BER current state value;
2) add up interior average BER situation of this section period;
3) carry out the analysis of statistics, and adjust transmission means;
If BER＜0.0001529 then selects for use the DH5 mode to carry out transfer of data;
If 0.0001529＜-BER＜0.0060795, then select for use the DH3 mode to carry out transfer of data;
If 0.0060795-＜BER＜0.0157813 then selects for use the DH1 mode to carry out transfer of data;
If 0.0157813＜-BER, then select for use the DM1 mode to carry out transfer of data;
4) return 1) continue the statistics of timing next time and adjust transmission mode;
Bluetooth module comprises base band (Baseband) agreement, link management layer protocol (LMP), logical link control and adaptation protocol (L2CAP) and service discovery protocol (SDP), the description of RF circuit module, controlling links and signal power matching module, noise reduction technology and bluetooth applications protocol stack.
2, described according to claim 1 based on communication module between the portable terminal of Bluetooth technology, it is characterized in that described transmission algorithm is to analyze bluetooth network at different bit error rate (BER, Bit ErrorRate) on the transfer of data situation basis under the mode condition, a kind of self-adapting data transmission algorithm of the blueteeth network based on physical link layer BER pattern is proposed.
3, described according to claim 1 based on communication module between the portable terminal of Bluetooth technology, it is characterized in that in the described algorithm Bluetooth ACL packet data package be divided in the data rate type (DM, DataMedium) and high data rate type (DH, Data High).
4, described according to claim 1 based on communication module between the portable terminal of Bluetooth technology, it is characterized in that to insert PPP and RFCOMM layer again between the network layer and L2CAP in the described blueteeth network module wireless access way, and finish mapping from the IP layer to the L2CAP layer by BNEP.
5, described according to claim 1 based on communication module between the portable terminal of Bluetooth technology, it is characterized in that the concrete form of described BNEP packet is (BNEP type field, extension flag position E, extended head content, BNEP payload).
6, according to claim 1 or 5 described, it is characterized in that the mm of described bluetooth network encapsulation protocol BNEP payload section is decided to be 1691 bytes based on communication module between the portable terminal of Bluetooth technology.
7, described according to claim 1 based on communication module between the portable terminal of Bluetooth technology, it is characterized in that described RF circuit module adopts the pcb board wiring technique of high frequency characteristics, circuit high frequency performance in conjunction with master-plan layout and device is coordinated, and reduces between each RF device and the interference of the electromagnetic signal between the circuit.
8, described according to claim 1 based on communication module between the portable terminal of Bluetooth technology, it is characterized in that described noise reduction technology adopts the high-frequency signal that reduces between the inside modules wiring route to disturb, and introduces the noise adaptation mechanism is in time adjusted noise according to external environment filtration matching factor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610036844.7A CN1909397A (en) | 2006-08-01 | 2006-08-01 | Communication modular between mobile terminals based on Blue Tooth technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610036844.7A CN1909397A (en) | 2006-08-01 | 2006-08-01 | Communication modular between mobile terminals based on Blue Tooth technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1909397A true CN1909397A (en) | 2007-02-07 |
Family
ID=37700400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610036844.7A Pending CN1909397A (en) | 2006-08-01 | 2006-08-01 | Communication modular between mobile terminals based on Blue Tooth technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1909397A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101127538B (en) * | 2007-09-19 | 2011-11-23 | 中兴通讯股份有限公司 | Self-adapted match method between different Bluetooth devices |
| CN103260255A (en) * | 2013-05-15 | 2013-08-21 | 江苏奇异点网络有限公司 | Method for mobile terminal to share network resources |
| CN103532936A (en) * | 2013-09-28 | 2014-01-22 | 福州瑞芯微电子有限公司 | Bluetooth audio self-adaption transmission method |
| CN103825905A (en) * | 2014-03-10 | 2014-05-28 | 云中致用（广州）信息科技有限公司 | Method and device for multimedia data exchange |
-
2006
- 2006-08-01 CN CN200610036844.7A patent/CN1909397A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101127538B (en) * | 2007-09-19 | 2011-11-23 | 中兴通讯股份有限公司 | Self-adapted match method between different Bluetooth devices |
| CN103260255A (en) * | 2013-05-15 | 2013-08-21 | 江苏奇异点网络有限公司 | Method for mobile terminal to share network resources |
| CN103532936A (en) * | 2013-09-28 | 2014-01-22 | 福州瑞芯微电子有限公司 | Bluetooth audio self-adaption transmission method |
| CN103825905A (en) * | 2014-03-10 | 2014-05-28 | 云中致用（广州）信息科技有限公司 | Method and device for multimedia data exchange |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI398146B (en) | Method and system for low rate mac/phy for 60 ghz transmission | |
| Zhang et al. | Cost-effective cache deployment in mobile heterogeneous networks | |
| US8340068B2 (en) | Method and system for enabling rendering of electronic media content via a secure ad hoc network configuration utilizing a handheld wireless communication device | |
| TWI393389B (en) | Method and system for a handheld wireless communication device for configuring connection to and use of local and remote resources | |
| CN100341351C (en) | Mobile mesh AD-HOC networking | |
| HK1203735A1 (en) | Scheduling data transmission by medium access control (mac) layer in a mobile network (mac) | |
| CN104717603B (en) | A kind of Bluetooth Low Energy networking simultaneously supports the method and system of convenient interconnection | |
| CN1832442A (en) | Method and system of automatic access bluetooth device into network | |
| US20090055516A1 (en) | Method and system for managing bluetooth communication using software or firmware filtering | |
| WO2004017548A3 (en) | System for mobil broadband networking using dynamic quality of service provisioning | |
| CN1449629A (en) | Method and system for providing wireless multimedia services using bluetooth | |
| EP1708417A4 (en) | An interactive method of a wireless local area network user terminal rechoosing a management network | |
| CN1642271A (en) | Method for processing VOD data in mobile station | |
| CN1909397A (en) | Communication modular between mobile terminals based on Blue Tooth technology | |
| CN103687065A (en) | Method for pairing and connecting intelligent terminal and wireless network sound equipment | |
| CN204104110U (en) | A kind of audio amplifier network | |
| CN101651473B (en) | Communication apparatuses, methods for manufacturing chips and method for providing wireless communication profile | |
| Sankaran et al. | Importance of fifth generation wireless systems | |
| Ajmal et al. | Survey on cache schemes in heterogeneous networks using 5g internet of things | |
| Frattasi et al. | Cooperative services for 4G | |
| Bhat et al. | 5G evolution and need: A study | |
| CN106488308A (en) | A kind of multimedia share system based on wifi network and method | |
| CN100340086C (en) | Intelligent method for building up network of wireless devices | |
| CN105636242A (en) | Home office network based on Bluetooth technology | |
| Rong et al. | Study on application of bluetooth tecnologies in CNC system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20070207 |