2022年藍(lán)牙技術(shù)發(fā)展歷程

1、out city created, and care masses life, focus work, in-depth investigation, more out boutique masterpiece, makes we of research results more to into led of decision vision, more to in national some has effect of newspaper shang published, for advance work, and publicity changde play due of role. thi

2、rd, information submitted to be pragmatic. quick and timely. the ancients said: for the time system; statement back for the time being, nothing. therefore, the submission of information to do four, that is, find the probl em faster, editorial writing, send and read faster approval and feedba ck to i

3、mplement quickly. to be true and accurate. true mainly reflect the full picture of events, one is one, two, this is the life of the information. accuracy is primarily qualitative and quantitative questions, quantitative objective of publicqualitative logic. to be reliable and useful. we submit infor

4、mation to have access to decisi on-making, to guide and promote the work and solve practical problems. mixed cum. on the negative information and emergency information, rapid escalation i n strict accordance with the procedures, firm, newspaper, newspapers, never late, fail to report, false claim an

5、d skimming. investee 2. supervision and insist on, around and protecting their interests to touch the truth, sek practical results. adhere to people-oriented, the most important thing is to realize, safeguard and develop the fundamental interests of the overwhelming majority of the people. we carry

6、out inspection, so must go deep among the masses, go dee p into the realities, always pay attention to the peoples livelihood, to grasp the public sentiment, and earnestly safeguard the benefit, addressi ng the masses are most concerned about and reflecting the strongest issues, efforts to solve the

7、 pr obl em of decisions implemented and not implemented. one is to stick to prnci ples. right of inspection is one of the most important powers of the office, should not only dare to use, but also with caution. so-called dared to use, i s to hold a number of important issues, bold supervision over s

8、upervision, track inspection, problems are not solved do not pass, the blame does not hold did not miss, dissatisfaction of the masses did not miss, the real right of supervision authority, with the benefits. call with caution, is supervising departments should strengthe n the consciousness of autho

9、rized strictly according to pr ocedure, preventing the supervision and excessive to prevent adding burden to grass-roots. o this end, the supervision department of the party committee of supervision must be under city and county party committee secretary-general (office). second, we shoul d focus on

10、. is the gov ernor, those related to the globalevent, governor the protracted difficult, strong governor during emergency urgent. not having special departments in charge of the general governor, under the normal procedure can do good things not governor, not a uthorized by county leaders, not the g

11、overnor. third is to solvethe problem. the purpose of supervision, to resolve the problem. to adhere to and further improve thefeelings survey, by looking up public sentiments to find problems. problems will increase its special supervision, set up accounts, hold on to it. we should conscientiously

12、implement the lea ding contracting matters, secured, had an answ er to everything, then settles rate of 100%. have an impact on some of the outstandi ng issues, supervision departments and information components together, play the supervisory role of the news media to promote problem solving. invest

13、ee 3. insist on a daily run, around the practice of truth catching efficiency, focus specification. to give full play to the party office around connecting, coordinating internal and external features, contact, rally at all levels, to motivate every aspe ct, adhere to the truth, strengthening standa

14、rdized ma nagement to achieve coherent, efficient and effective functioning of the daily work of the party committee. is processing messages should strive to streamline, standardize and quality. streamlining is to contr ol the number ofmessages, compress messages, reducing procedures, improve messag

15、e handling efficiency. specifications, is to strictly enforce the ban issued by the communist party authorities in document handli ng regulations and provincial and m unicipal regulations, conscientiously strengthen a nd improve communications management to ensure that party documents orderly. high

16、quality, is to improve the quality of message proce ssi ng, it is necessary to accurately implementing the intention of the party committee, clearance, good communications, poli cy program close d, ensuring that there is no error. second meeting scheduled to ensure thorough, safe and efficient. any

17、arrangements for the meetings and events, carefully arranged, item-by -item interface implemented, sure. to vigorously streamline meetings, activities, number of pressure reduction, scale to ensure that leadership emerged from the general conference and entertainment services, focus on big things, m

18、atters. third, reception serviceshould lay stress on humane, personal, cultural and human. reception and work directly with people, reception services dire ctly affecting the office of party committee the image of the region. at the same time strengthening the construction of library, improve the re

19、 ception conditions, more human-oriented, personal, cultural work into the reception, a little more human needs, a little more human car e more humane atmosphere, and constantly improve the service, improve the quality of service. meanwhile, to further pay special attention to the daily work of the

20、ot her office system. confidential work responsibility system for leadi ng cadres to implement security as a leader, to improve the confidentiality of classified personnel, especially leading cadre s, strengthening party and government focus on vital sectors of security management, to advance privac

21、y management standardization, modernization of security techniques as a means of administration according to law and securityenforcement, ensure the safety of the party and state secrets. confidential work to meet the demands of new technology development藍(lán)牙技術(shù)發(fā)展歷程2007年 09 月 15 日 星期六 08:35 umts “藍(lán)牙”（

22、bluetooth） 技術(shù)是由世界著名的5家大公司愛立信（ericsson） 、諾基亞（nokia、東芝（toshiba）、國際商用機(jī)器公司（ibm）和英特爾（intel），于1998年5月聯(lián)合宣布的一種無線通信新技術(shù)。它是針對： 1藍(lán)牙技術(shù)“藍(lán)牙”（bluetooth）原為歐洲中世紀(jì)的丹麥皇帝hndd的名字，他為統(tǒng)一四分五裂的瑞典、芬蘭、丹麥有著不朽的功勞。瑞典的ericsson公司為這種即將成為全球通用的無線技術(shù)命此名，也許大有一統(tǒng)天下的含義。藍(lán)牙技術(shù)是一種無線數(shù)據(jù)與語音通信的開放性全球規(guī)范，它以低成本的近距離無線連接為基礎(chǔ)， 為固定與移動(dòng)設(shè)備通信環(huán)境建立一個(gè)特別連接的短程無線電技術(shù)。其實(shí)

23、質(zhì)內(nèi)容是要建立通用的無線電空中接口（radio air interface）及其控制軟件的公開標(biāo)準(zhǔn)，使通信和算機(jī)進(jìn)一步結(jié)合，使不同廠家生產(chǎn)的便攜式設(shè)備在沒有電線或電纜相互連接的情況下，能在近距離范圍內(nèi)具有互用、相互操作的性能（interoperability）。其程序?qū)懺谝粋€(gè)9mm 9m m的微芯片中?！八{(lán)牙”技術(shù)的作用是簡化小型網(wǎng)絡(luò)設(shè)備（如移動(dòng)pc、掌上電腦、手機(jī)）之間以及這些設(shè)備與internet之間的通信，免除在無繩電話或移動(dòng)電話、調(diào)制解調(diào)器、頭套式送受話器、pdas、計(jì)算機(jī)、打印機(jī)、幻燈機(jī)、局域網(wǎng)等之間加裝電線、電纜和連接器。而且，這種技術(shù)可以延伸到那些完全不同的新設(shè)備和新應(yīng)用中去。例

24、如，如果把藍(lán)牙技術(shù)引人到移動(dòng)電話和膝上型電腦中，就可以去掉移動(dòng)電話與膝上型電腦之間的令人討厭的連接電纜而通過無線使其建立通信。打印機(jī)、pda、桌上型電腦、傳真機(jī)、鍵盤、游戲操縱桿以及所有其它的數(shù)字設(shè)備都可以成為藍(lán)牙系統(tǒng)的一部分。除此之外， 藍(lán)牙無線技術(shù)還為已存在的數(shù)字網(wǎng)絡(luò)和外設(shè)提供通用接口以組建一個(gè)遠(yuǎn)離固定網(wǎng)絡(luò)的個(gè)人特別連接設(shè)備群。“藍(lán)牙”技術(shù)的無線電收發(fā)器的鏈接距離可達(dá)30英尺， 不限制在直線范圍內(nèi)，甚至設(shè)備不在同一間房內(nèi)也能相互鏈接；并且可以鏈接多個(gè)設(shè)備，最多可達(dá)7個(gè)，這就可以把用戶身邊的設(shè)備都鏈接起來，形成一個(gè)“個(gè)人領(lǐng)域的網(wǎng)絡(luò)”（personal areanetwork） 。 2藍(lán)牙系統(tǒng)

25、在了解藍(lán)牙系統(tǒng)結(jié)構(gòu)之前，先熟悉藍(lán)牙系統(tǒng)幾個(gè)常用的專有名詞。 *piconet： 通過藍(lán)牙技術(shù)連接在一起的所有設(shè)備被認(rèn)為是一個(gè)piconet。 一個(gè)piconet可以只是兩臺(tái)相連的設(shè)備，比如一臺(tái)便攜式電腦和一部移動(dòng)電話，也可以是8臺(tái)連在一起的設(shè)備。一個(gè)piconet中， 所有設(shè)備都是級別相同的單元，具有相同的權(quán)限。 但是在piconet網(wǎng)絡(luò)初時(shí)，其中一個(gè)單元被定義為master，其它單元被定義為slave。 *master unit：主單元，即在一個(gè)piconet中，其時(shí)鐘和跳頻順序被用來同步其它單元的設(shè)備。精品學(xué)習(xí)資料 可選擇p d f - - - - - - - - - - - - - -

26、第 1 頁，共 5 頁 - - - - - - - - -精品學(xué)習(xí)資料 可選擇p d f - - - - - - - - - - - - - - 第 1 頁，共 5 頁 - - - - - - - - -out city created, and care masses life, focus work, in-depth investigation, more out boutique masterpiece, makes we of research results more to into led of decision vision, more to in national some

27、has effect of newspaper shang published, for advance work, and publicity changde play due of role. third, information submitted to be pragmatic. quick and timely. the ancients said: for the time system; statement back for the time being, nothing. therefore, the submission of information to do four,

28、that is, find the probl em faster, editorial writing, send and read faster approval and feedba ck to implement quickly. to be true and accurate. true mainly reflect the full picture of events, one is one, two, this is the life of the information. accuracy is primarily qualitative and quantitative qu

29、estions, quantitative objective of publicqualitative logic. to be reliable and useful. we submit information to have access to decisi on-making, to guide and promote the work and solve practical problems. mixed cum. on the negative information and emergency information, rapid escalation i n strict a

30、ccordance with the procedures, firm, newspaper, newspapers, never late, fail to report, false claim and skimming. investee 2. supervision and insist on, around and protecting their interests to touch the truth, sek practical results. adhere to people-oriented, the most important thing is to realize,

31、 safeguard and develop the fundamental interests of the overwhelming majority of the people. we carry out inspection, so must go deep among the masses, go dee p into the realities, always pay attention to the peoples livelihood, to grasp the public sentiment, and earnestly safeguard the benefit, add

32、ressi ng the masses are most concerned about and reflecting the strongest issues, efforts to solve the pr obl em of decisions implemented and not implemented. one is to stick to princi ples. right of inspection is one of the most important powers of the office, should not only dare to use, but also

33、with caution. so-called dared to use, i s to hold a number of important issues, bold supervision over supervision, track inspection, problems are not solved do not pass, the blame does not hold did not miss, dissatisfaction of the masses did not miss, the real right of supervision authority, with th

34、e benefits. call with caution, is supervising depart ments should strengthe n the consciousness of authorized strictly according to pr ocedure, preventing the supervision and excessive to prevent adding burden to grass-roots. o this end, the supervision department of the party committee of supervisi

35、on must be under city and county party committee secretary-general (office). second, we shoul d focus on. is the gov ernor, those related to the globalevent, governor the protracted diff icult, strong governor during emergency urgent. not having special departments in charge of the general governor,

36、 under the normal procedure can do good things not governor, not a uthorized by county leaders, not the governor. third is to solvethe problem. the purpose of supervision, to resolve the problem. to adhere to and further improve thefeelings survey, by looking up public sentiments to find problems. p

37、roblems will increase its special supervision, set up accounts, hold on to it. we should conscientiously implement the lea ding contracting matters, secured, ha d an answ er to everything, then settles rate of 100%. have an impact on some of the outstandi ng issues, supervision departments and infor

38、mation components together, play the supervisory role of the news media to promote problem solving. investee 3. insist on a daily run, around the practi ce of truth catching efficiency, focus specification. to give full play to the party office around connecting, coor dinating internal and external

39、features, contact, rally at all levels, to motivate every aspe ct, adhere to the truth, strengthening standardized ma nagement to achieve coherent, efficient and effective functioning of the daily work of the party committee. is processing messages should strive to streamline, standardize and qualit

40、y. streamlining is to contr ol the number ofmessages, compress messages, reducing procedures, improve message handling efficiency. specifications, is to strictly enforce the ban issued by the communist party authorities in document handli ng regulations and provincial and municipal regulations, cons

41、cientiously strengthen a nd improve communications management to ensure that party documents orderly. high quality, is to improve the quality of message proce ssi ng, it is necessary to accurately implementing the intention of the party committee, clearance, good communications, poli cy program clos

42、e d, ensuring that there is no error. second meeting scheduled to ensure thorough, safe and efficient. any arrangements for the meetings and events, carefully arranged, item-by -item interface implemented, sure. to vigorously streamline meetings, activities, number of pressure reduction, scale to en

43、sure that leadership emerged from the general conference and entertainment services, focus on big things, matters. third, reception serviceshould lay stress on humane, personal, cultural and human. reception and work directly with people, reception services dire ctly affecting the office of party co

44、mmittee the image of the region. at the same time strengthening the construction of library, improve the re ception conditions, more human-ori ented, personal, cultural work into the reception, a little more human needs, a little more human car e more humane atmosphere, and constantly improve the se

45、rvice, improve the quality of service. meanwhile, to further pay special attention to the daily work of the ot her office system. confidential work responsibility system for leadi ng cadres to implement security as a leader, to improve the confidentiality of classified personnel, especially leading

46、cadre s, strengthening party and government focus on vital sectors of security management, to advance privacy management standardization, modernization of security techniques as a means of administration according to law and securityenforcement, ensure the safety of the party and state secrets. conf

47、idential work to meet the demands of new technology development *slave units：從單元，即piconet中不是master的所有設(shè)備。 * scatternet：幾個(gè)獨(dú)立且不同步的piconet組成一個(gè)scatternet。 * mac address：用來區(qū)分piconet中各單元的長度為3比特的地址。 parked units：暫停單元，即piconet中與網(wǎng)絡(luò)保持同步但沒有mac address的設(shè)備。 *sniff and hold mode：呼吸與保持模式，與網(wǎng)絡(luò)同步但進(jìn)入睡眠狀態(tài)以節(jié)省能源的一種工作模式。藍(lán)牙

48、系統(tǒng)一般由以下4個(gè)功能單元組成： * 天線單元 *鏈路控制（固件）單元 *鏈路管理（軟件）單元 *藍(lán)牙軟件（協(xié)議）單元 2.1天線單元藍(lán)牙要求其天線部分體積十分小巧、重量輕，因此，藍(lán)牙天線屬于微帶天線。藍(lán)牙空中接口是建立在天線電平為0 dbm的基礎(chǔ)上的。空中接口遵循federal communication commission（簡稱fcc，即美國聯(lián)邦通信委員會(huì)）有關(guān)電平為 0 dbm的ism頻段的標(biāo)準(zhǔn)。如果全球電平達(dá) 100 mw以上，可以使用擴(kuò)展頻譜功能來增加一些補(bǔ)充業(yè)務(wù)。頻譜擴(kuò)展功能是通過起始頻率為2.402ghz，終止頻率為2.480ghz，間隔為1mhz的79個(gè)跳頻頻點(diǎn)來實(shí)現(xiàn)的。 出

49、于某些本地規(guī)定的考慮，日本、法國和西班牙都縮減了帶寬。最大的跳頻速率為1660跳s。理想的連接范圍為100mm10m，但是通過增大發(fā)送電平可以將距離延長至100m。藍(lán)牙工作在全球通用的2.4ghzism（即工業(yè)、科學(xué)、醫(yī)學(xué)）頻段。藍(lán)牙的數(shù)據(jù)速率為1mbs。 ism頻帶是對所有無線電系統(tǒng)都開放的頻帶，因此使用其中的某個(gè)頻段都會(huì)遇到不可預(yù)測的干擾源。例如某些家電、無繩電話、汽車房開門器、微波爐等等，都可能是干擾。 為此， 藍(lán)牙特別設(shè)計(jì)了快速確認(rèn)和跳頻方案以確保鍵路穩(wěn)定。跳頻技術(shù)是把頻帶分成若干個(gè)跳頻信道（hop channel），在一次連接中，無線電收發(fā)器按一定的碼序列（即一定的規(guī)律，技術(shù)上叫做“

50、偽隨機(jī)碼”，就是“假”的隨機(jī)碼）不斷地從一個(gè)信道“跳”到另一個(gè)信道， 只有收發(fā)雙方是按這個(gè)規(guī)律進(jìn)行通信的，而其它的干擾不可能按同樣的規(guī)律進(jìn)行干擾； 跳額的瞬時(shí)帶寬是很窄的，但通過擴(kuò)展頻譜技術(shù)使這個(gè)窄帶成百倍地?cái)U(kuò)展成寬頻帶，使干擾可能造成的影響變得很小。時(shí)分雙工（time division duplex，簡稱tdd）方案被用來實(shí)現(xiàn)全雙工傳輸。與其它工作在相同頻段的系統(tǒng)相比，藍(lán)牙跳頻更快，數(shù)據(jù)包更短，這使藍(lán)牙比其它系統(tǒng)精品學(xué)習(xí)資料 可選擇p d f - - - - - - - - - - - - - - 第 2 頁，共 5 頁 - - - - - - - - -精品學(xué)習(xí)資料 可選擇p d f -

51、- - - - - - - - - - - - - 第 2 頁，共 5 頁 - - - - - - - - -out city created, and care masses life, focus work, in-depth investigation, more out boutique masterpiece, makes we of research results more to into led of decision vision, more to in national some has effect of newspaper shang published, for ad

52、vance work, and publicity changde play due of role. third, information submitted to be pragmatic. quick a nd timely. the ancients said: for the time system; statement back for the time being, nothing. therefore, the submission of information to do four, that is, find the probl em faster, editorial w

53、riting, send and read faster approval and feedba ck to implement quickly. to be true and accurate. true mainly reflect the full picture of events, one is one, two, this is the life of the information. accuracy is primarily qualitative and quantitative questions, quantitative objective of publicquali

54、tative logic. to be reliable and useful. we submit information to have access to decisi on-making, to guide and promote the work and solve practical problems. mixed cum. on the negative information and emergency information, rapid escalation i n strict accordance with the procedures, firm, newspaper

55、, newspapers, never late, fail to report, false claim and skimming. investee 2. supervision and insist on, around and protecting their interests to touch the truth, sek practical results. adhere to people-oriented, the most important thing is to realize, safeguard and develop the fundamental interes

56、ts of the overwhelming majority of the people. we carry out inspection, so must go deep among the masses, go dee p into the realities, always pay attention to the peoples livelihood, to grasp the public sentiment, and earnestly safeguard the benefit, addressi ng the masses are most concerned about a

57、nd reflecting the strongest issues, efforts to solve the pr obl em of decisions implemented and not implemented. one is to stick to princi ples. right of inspection is one of the most important powers of the office, should not only dare to use, but also with caution. so-called dared to use, i s to h

58、old a number of important issues, bold supervision over supervision, track inspection, problems are not solved do not pass, the blame does not hold did not miss, dissatisfaction of the masses did not miss, the real right of supervision authority, with the benefits. call with caution, is supervising

59、departments should strengthe n the consciousness of authorized strictly according to pr ocedure, preventing the supervision and excessive to prevent adding burden to grass-roots. o this end, the supervision department of the party committee of supervision must be under city and county party committe

60、e secretary-general (office). second, we shoul d focus on. is the gov ernor, those related to the globalevent, governor the protracted diff icult, strong governor during emergency urgent. not having special departments in charge of the general governor, under the normal procedure can do good things