CN1298144C - A method for implementing WLAN piconet networking - Google Patents
A method for implementing WLAN piconet networking Download PDFInfo
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- CN1298144C CN1298144C CNB031425321A CN03142532A CN1298144C CN 1298144 C CN1298144 C CN 1298144C CN B031425321 A CNB031425321 A CN B031425321A CN 03142532 A CN03142532 A CN 03142532A CN 1298144 C CN1298144 C CN 1298144C
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Abstract
The present invention discloses a method for implementing WLAN micronet networking. The method is characterized in that each access point intercommunicates with multiple mobile terminals through external antennae, and the access points intercommunicate with each another through the external antennae. The method also comprises the steps that a built-in antenna is arranged in each access point; according to the capacity requirement of a WLAN micronet, the number of the access points required by the WLAN micronet and the coverage range of each access point are determined; the output power of each access point is set, and the antenna gain of each access point is determined according to the output power and the coverage area of each access point; whether the antenna gain of the access point is larger than or equal to a preset value is judged, and if the antenna gain of the access point is larger than or equal to the preset value, each access point continues to use the external antenna to send and receive signals; otherwise, the antenna of each access point is switched so that each access point uses the built-in antenna to send and receive the signals. The method realizes the networking of the WLAN micronet.
Description
Technical field
The present invention relates to a kind of network-building method of WLAN (wireless local area network), the implementation method of particularly a kind of WLAN (wireless local area network) piconet networking.
Background technology
WLAN (wireless local area network) be a kind ofly follow international Institute of Electrical and Electric Engineers (IEEE) 802.11 agreements, with the local area network (LAN) of electromagnetic wave as transmission medium.The working frequency range of IEEE 802.11a and IEEE 802.11b is respectively 2.4G and 5G, and the highest physical interface speed of support is 11Mbps and 54Mbps, and IEEE802.11a adopts identical media access control protocol (MAC) with IEEE 802.11b.
WLAN (wireless local area network) mainly is made up of the portable terminal and the access point that insert wireless LAN card, and portable terminal and access point are shared same channel under the control of MAC.Infrastructure (Infrastructure) pattern that a plurality of portable terminals can be transmitted with access point organization center point, and interconnected by access point and cable network or other access point.As shown in Figure 1, Fig. 1 is a kind of wireless local area network building figure of Infrastructure pattern, and its specific descriptions are: access point (AP) is continuous with different portable terminals by wireless connections, and AP is connected with cable network by wired connection.
AP usually adopts the external antenna receiving and transmitting signal, because the gain of external antenna is higher, therefore, the coverage of AP is bigger.When portable terminal is sparse, set up WLAN (wireless local area network), owing to there are not a lot of users to land wireless network simultaneously, message capacity is less demanding, at this moment, the characteristics that the AP coverage is bigger are advantages.But, when when portable terminal is intensive, as: when opening large-scale exhibition, set up the WLAN (wireless local area network) piconet, land wireless network owing to have many consumers simultaneously, thus require among a small circle, to use a plurality of AP with the raising traffic rate, and the coverage of requirement control AP prevents the cochannel interference problem between the different AP, at this moment, the characteristics that the AP coverage is bigger are exactly a shortcoming.When owing between the big AP that causes of coverage of AP the cochannel serious interference time, just may not realize setting up the WLAN (wireless local area network) piconet with AP.
By foregoing description as can be seen, how controlling the coverage of AP, make the networking mode of the coverage adaptation different wireless local area network of AP, particularly adapt to the networking of WLAN (wireless local area network) piconet, is a problem demanding prompt solution.
Summary of the invention
By Given this, the invention provides the implementation method of a kind of WLAN (wireless local area network) piconet networking, this method has realized the networking of WLAN (wireless local area network) piconet.
According to above-mentioned purpose, specific embodiments of the present invention is:
The implementation method of a kind of WLAN (wireless local area network) piconet networking, each access point are by external antenna and a plurality of portable terminal mutual communication, and by the external antenna mutual communication, this method also comprises between access point and the access point:
A, built-in aerial is set in access point;
B, according to the capacity requirement of WLAN (wireless local area network) piconet, determine the scope that this number of netting required access point and each access point cover;
C, the power output of access point is set,, determines the antenna gain of access point according to the power output and the coverage of access point;
D, judge access point antenna gain whether more than or equal to preset value, if access point continues use the external antenna receiving and transmitting signal, otherwise the antenna of switching access point makes access point built-in aerial receiving and transmitting signal.
The radio frequency socket switch is set in described access point, and this radio frequency socket switch switches built-in aerial in the access point and external antenna.
Described access point built-in aerial is built-in microstrip antenna.
The built-in microstrip antenna of described access point is for falling L shaped metal antenna.
Described preset value is the least gain of access point external antenna.
Described step B further comprises:
The number of b1, the required access point of WLAN (wireless local area network) piconet is the value that the capacity of WLAN (wireless local area network) piconet obtains divided by the capacity of access point;
The value that the scope that b2, each access point cover obtains divided by the number of access point for this WLAN (wireless local area network) piconet coverage.
At described access point two built-in microstrip antennas and two external antennas are set respectively, are used for space diversity reception.
Built-in aerial configuration impedance matching network to described access point.
This method also comprises: adopt distributed constant matching method, lumped parameter matching method or antenna pattern matching method configuration impedance matching network.
Described definite access point antenna gain further comprises: c1, utilize the access point coverage to calculate the access point covering radius according to area formula of circle; It is to add 92.4 values that obtain behind the logarithm of operating frequency of end access point that c2,20 multiply by with 10, and this value adds 20, and to multiply by with 10 be that the logarithm of end access point covering radius obtains the electric wave free-space loss;
C3, the power output of access point is set, the access point antenna gain is for after the portable terminal receiving sensitivity deducts the antenna gain of access point power output and portable terminal, adds the value that electric wave free-space loss and the fading margin of communicating by letter obtain.
The invention provides the method for a kind of WLAN (wireless local area network) piconet networking, because setting up the visual plant of WLAN (wireless local area network) piconet is AP, and whether AP can provide the required smaller coverage of WLAN (wireless local area network) piconet to become the key that whether can realize the networking of WLAN (wireless local area network) piconet, the method that the present invention adopts built-in microstrip antenna and external antenna to combine on AP, when portable terminal is intensive, a plurality of AP adopt built-in microstrip antenna to carry out short-range signal transmitting and receiving, when improving whole capacity of wireless local area network, prevent the interference of cochannel between the AP, realized the networking of WLAN (wireless local area network) piconet; When portable terminal was sparse, AP adopted external antenna to communicate, and improves the coverage of AP in the WLAN (wireless local area network), has reduced the number of AP in the WLAN (wireless local area network), has saved cost.
Description of drawings
Fig. 1 is a kind of wireless local area network building figure of Infrastructure pattern.
Fig. 2 is the networking diagram of WLAN (wireless local area network) piconet of the present invention.
Fig. 3 is nonoverlapping three the networking channel block diagrams of WLAN (wireless local area network).
Fig. 4 is the networking implementation method flow chart of WLAN (wireless local area network) piconet.
Fig. 5 is the internal frame diagram of AP embodiment in a kind of WLAN (wireless local area network) piconet.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, by the following examples and with reference to accompanying drawing, the present invention is described in more detail.
When a regional portable terminal is intensive, a plurality of users internet logins are simultaneously just arranged, in order to improve message capacity, adopt the networking mode of WLAN (wireless local area network) piconet in this area, its networking mode as shown in Figure 2, its specific descriptions are:
Contain a plurality of AP in this WLAN (wireless local area network) piconet, each AP is continuous with different portable terminals by wireless connections, and the connected mode between AP and the AP can be wired connection mode or wireless connections mode.
The present invention illustrates the composition mode of this net with the WLAN (wireless local area network) piconet that is operated in the 2.4GHz working frequency range: have 14 channels can carry out work at 2.4GHz working frequency range WLAN (wireless local area network) piconet, the centre frequency of 14 channels can working is that 2412MHz is to 2484MHz, preceding 12 channel frequency separations are 5MHz, the frequency of promptly preceding 12 channels be respectively 2412MHz, 2417MHz, 2422MHz ..., 13rd, 14 channels are the channel that Japan adopts, and frequency is 2472MHz, 2484MHz.But; the WLAN (wireless local area network) piconet adopts the modulation system of direct sequence spread spectrum; its signal bandwidth is 22MHz; add the frequency interval protection of 3MHz; avoid the actual networking frequency of co-channel interference that three frequencies are only arranged: 1 channel 2412MHz; 6 channel 2437MHz; 11 channel 2462MHz; therefore; when the WLAN (wireless local area network) piconet carried out networking, for fear of the interference between the shared channel, areal also can only adopt 3 frequencies of 3 AP to carry out networking; as shown in Figure 3, Fig. 3 is nonoverlapping three the networking channel block diagrams of WLAN (wireless local area network).
If adopt 3 AP to utilize 3 frequencies to carry out networking, for the intensive WLAN (wireless local area network) piconet of user, the message capacity that it provided can not meet the demands far away; Use same frequency to carry out networking if adopt at a plurality of AP, because AP has certain coverage, the AP that another same frequency is set in the coverage of certain AP will cause occurring in the WLAN (wireless local area network) piconet interference of shared channel.
Reduce the coverage that power can change AP, occur the problem that shared channel disturbs in the WLAN (wireless local area network) piconet thereby solve.But, in order to satisfy IEEE 802.11b agreement and spuious requirement, the power of AP can't unrestrictedly descend, the AP minimum power can be adjusted to 6dBmw at present, use this power can reduce the coverage of AP, but for setting up the WLAN (wireless local area network) piconet, use the AP covering of minimum power still bigger than normal, still can cause between the AP in the WLAN (wireless local area network) piconet co-channel interference to occur.
Therefore, the present invention has adopted the compound mode that built-in microstrip antenna and external antenna combine in AP.When setting up the WLAN (wireless local area network) piconet, capacity requirement according to the WLAN (wireless local area network) piconet, determine the coverage of number and the AP of AP, determine to use little band built-in aerial or the external antenna of AP again according to the coverage of AP: the scope that AP need cover in the WLAN (wireless local area network) piconet hour, adopt the built-in microstrip antenna of AP to carry out receiving and transmitting signal; When the scope that need cover as AP in the WLAN (wireless local area network) piconet is big, adopt the external antenna receiving and transmitting signal of AP.
As shown in Figure 4, Fig. 4 is the networking implementation method flow chart of WLAN (wireless local area network) piconet, and its specific implementation process is:
Step 400 is provided with built-in microstrip antenna and can switches microstrip antenna among the AP and the radio frequency socket switch of external antenna in AP;
Step 401, determine the number of AP according to the requirement of message capacity, message capacity is to add up with every square kilometre bandwidth, suppose that there are two kinds of situations in each area: every square kilometre bandwidth was Vhigh Mbps when message capacity was higher, and every square kilometre bandwidth was Vlow Mbps when message capacity was low;
Step 402 is determined the coverage of each AP according to the number of AP;
Step 403 is provided with the power output of AP, according to power output and the coverage of AP, determines the antenna gain of AP;
Step 404～406 are because the least gain minimum of AP external antenna can only arrive 2dB, so whether the antenna gain of judging AP more than or equal to 2dB, if the antenna gain of AP more than or equal to 2dB, is changed the radio frequency socket switch, makes AP select the external antenna receiving and transmitting signal; If the antenna gain of AP is less than 2dB, conversion radio frequency socket switch makes AP select built-in microstrip antenna receiving and transmitting signal;
Step 407, determine antenna that AP selects after, determine the power output that AP is final, finish the networking of WLAN (wireless local area network) piconet.
Built-in microstrip antenna is set in AP, and this basic structure of microstrip antenna is: lay metal base plate and metal patch respectively in loss and all very little dielectric substrate two sides of thickness, form radiant body.Paster can be for having the surface elemant of regular shape, as: rectangle, circle and annulus etc., this microstrip antenna of being made up of the area chip unit is called micro-strip paster antenna; Paster also can be the thin slice oscillator of long narrow bar shaped, and this antenna is called the micro-strip oscillator antenna.Difform conductor patch forms different radiation directivities.
Microstrip antenna adopts the microstrip transmission line feed usually, also can adopt coaxial feeding.Feeding classification and antenna structure have determined the polarity mode of radiated wave.
Compare with the external antenna of AP, the built-in microstrip antenna of AP has the following advantages: size is little, and is in light weight, and price is low and mobility is good; Feeding network, matching network can be made with antenna structure, are fit to produce in enormous quantities; Realize circular polarization easily, two-band, dual polarizations etc. are multi-functional.But microstrip antenna also has shortcoming, and cause can't using in certain occasion: radiating element has the resonance characteristics, and frequency bandwidth is very narrow; There is the loss of conductor and medium; Power capacity is little, can only be used for the small-power occasion, and performance is influenced greatly by substrate material.
AP is operated in 2.4GHz or 5.7GHz in the WLAN (wireless local area network) piconet, and frequency bandwidth is 22GHz, belongs to narrow band communication, and AP can select built-in microstrip antenna.As: AP selects the microstrip antenna or the L shaped metal antenna that falls.
AP has had built-in microstrip antenna, and the impedance matching network of this built-in microstrip antenna must be set, and this impedance matching network not only can not have influence on the radiation efficiency of built-in microstrip antenna, and can influence the work of transmitter unit, reduces receiving sensitivity.
The impedance matching that built-in microstrip antenna is set has several different methods:
First method, the distributed constant matching method: the transmission line of a fixed structure has impedance transformation characteristic, adopt the printed board microstrip line or the microstrip line network of certain width can obtain matching effect between feeder line and the antenna, the printed board area shared owing to microstrip line is big, and common mobile device is inapplicable.
Second method, the lumped-parameter element matching method: Smith impedance chart shows, the lumped-parameter element of the in parallel or certain numerical value of connecting between feeder line and antenna, can reach the impedance matching between antenna and feeder line, this method has reduced the area of printed board greatly, and the AP among the present invention usually adopts this method.
The third method, the antenna pattern matching method, built-in microstrip antennas impedance is relevant with width, the shape of built-in microstrip antenna, changes the position of width, shape or the feed of built-in microstrip antenna, also can obtain impedance matching.
In order to switch built-in microstrip antenna and the external antenna of AP, the invention provides the radio frequency socket switch, this radio frequency socket switch is for the continuity of radio frequency transmission, generally be installed in impedance matching network after, on the terminal of radio-frequency transmission line.The voltage standing wave ratio of this radio frequency socket switch is less than 1.8, and for the low property of the loss that guarantees the radio frequency socket switch, loss value is less than 0.5dB.
The interface of common AP external antenna is 50 ohm of standard interfaces, when therefore selecting external antenna according to the coverage of AP, and the certain omnidirectional antenna that gains of employing, as: adopting usually gains to the whip antenna of 3dB or adopt to gain is the whip antenna of 8dB.
In order to reach the effect of AP space diversity reception, overcome the multipath fading of radio wave propagation, can adopt transmitting-receiving two built-in microstrip antennas and two external antennas separately, wherein, distance between two built-in microstrip antennas is chosen as four/three-wavelength, is preferably 5/4ths wavelength.As shown in Figure 5, Fig. 5 is the internal frame diagram of AP embodiment in a kind of WLAN (wireless local area network) piconet, and its specific descriptions are:
When transmitting, the signal that AP need launch is transferred to the radio frequency socket switch by RJ45 interface, ethernet transceiver, protocol converter, baseband signal processor, signal modem, transmit/receive switch and power amplifier, power output size according to these WLAN (wireless local area network) piconet needs, select built-in microstrip antenna or external antenna, the radio frequency socket switch is switched to corresponding position, this signal is transmitted in the WLAN (wireless local area network) piconet by built-in microstrip antenna or external antenna.
When received signal, power output size according to these WLAN (wireless local area network) piconet needs, select built-in microstrip antenna or external antenna, the radio frequency socket switch is switched to corresponding position, receive the signal of WLAN (wireless local area network) piconet by built-in microstrip antenna or external antenna, the signal of this reception is linked into AP by receiving link-diversity switching, transmit/receive switch, signal modem, baseband signal processor, protocol converter, ethernet transceiver and RJ45 interface, and AP receives this signal.
Radio wave propagation is subjected to the influence of electromagnetic environment, terrain environment and ground substance environment etc., when setting up the WLAN (wireless local area network) piconet, usually at first carry out the electromagnetism test of environment and understand terrain and its features, select suitable radio waves propagation model, the coverage of access point base station is calculated and estimate, carry out actual test at last, determine the networking of WLAN (wireless local area network).
Below lift instantiation explanation the present invention:
For the ease of analysis and calculating, suppose that radio waves propagation model is that free space is propagated, suppose that it is-90dBm (1Mbps) that then the coverage radius R of AP is calculated as follows that the mobile terminal receives sensitivity:
Ls＝92.4+201gf(GHz)+201gR(Km)； (1)
Rssenstivity＝Papout+Gap+Gstation-Ls-Lr； (2)
Wherein, Ls is the electric wave free-space loss, and Lr is made as 15dB herein for the communication fading margin, and f (GHz) is an operating frequency, calculates according to 2.45GHz herein, and R (Km) is the coverage radius of AP; Rssenstivity is that the mobile terminal receives sensitivity, and Papout is the access point power output, and Gap is the access point antenna gain; Gstation is the antenna gain of mobile terminal, and the mobile terminal antenna gain is 0dB.
According to formula (1) and formula (2), the coverage radius R of known AP can calculate Ls, further can calculate the antenna gain of AP; The antenna gain of known AP can calculate Ls, further can calculate the coverage radius of AP.
The minimum 30Mbps of being of message capacity of the every square kilometre of requirement in an area is set, is up to 300Mbps, analyze at both of these case.
When the message capacity of the every square kilometre of requirement in this area is 30Mbps, because the heap(ed) capacity that AP provides is 11Mbps, so this area need be provided with 3 AP.Each AP coverage is 0.333 square kilometre, and the radius that can calculate each AP coverage according to area formula of circle is 316m.The power output that each AP is set is 12.5dBm, and utilizing formula (1) and formula (2) to calculate antenna gain is 2.5dB, promptly adopts the external antenna among the AP to get final product, as: adopt pigtail shape antenna.
When the message capacity of the every square kilometre of requirement in this area is 300Mbps, because the heap(ed) capacity that AP provides is 11Mbps, so this area need be provided with 28 AP.Each AP coverage is 0.0357 square kilometre, and the radius that can calculate each AP coverage according to area formula of circle is 107m.Reduce the coverage of AP by the power that reduces AP, because the influence of factors such as spuious and emission spectrum, the I of the power of AP is set to 6dBm, suppose still to adopt gain to be the external antenna of 2.5dB, the coverage that can calculate AP according to formula (1) and formula (2) is 150m, this coverage than actual needs is big 1.5 times, can not satisfy the networking needs of actual wireless local area network (LAN) piconet, therefore must reduce antenna gain, adopt built-in microstrip antenna to carry out the transmitting-receiving work of signal, common built-in microstrip antenna gain is 0dB, calculating the AP power output according to formula (1) and formula (2) is 5.69dBmW, substantially equate with the minimum power output of AP, satisfy the networking needs of WLAN (wireless local area network) piconet substantially.
The power of regulating AP is a kind of method of adjusting coverage, and the power difference of AP is set, and the coverage of AP is also different, and the power of AP can be set to 5 grades usually, and therefore in external antenna gain one timing of AP, AP has 5 kinds of coverages optional.Be provided with built-in microstrip antenna in AP, AP has increased by 5 kinds of coverages again and can select.Hence one can see that, and the present invention is provided with the flexibility that built-in aerial has improved the AP networking in AP.
The AP that the invention provides in the WLAN (wireless local area network) piconet has external antenna and built-in microstrip antenna simultaneously, and when portable terminal was intensive, AP adopted built-in microstrip antenna to carry out receiving and transmitting signal, has avoided the interference problem of shared channel between the AP; When portable terminal was sparse, AP adopted external antenna to carry out receiving and transmitting signal, had reduced the quantity of AP in fixing area, had saved cost.Further, built-in microstrip antenna is set in AP, thereby can prevents owing to do not power up the AP unloaded operation that causes to AP under the situation of external antenna and burn the AP problem connecing.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1, the implementation method of a kind of WLAN (wireless local area network) piconet networking, each access point by the external antenna mutual communication, is characterized in that this method also comprises by external antenna and a plurality of portable terminal mutual communication between access point and the access point:
A, built-in aerial is set in access point;
B, according to the capacity requirement of WLAN (wireless local area network) piconet, determine the scope that this number of netting required access point and each access point cover;
C, the power output of access point is set,, determines the antenna gain of access point according to the power output and the coverage of access point;
D, judge access point antenna gain whether more than or equal to preset value, if access point continues use the external antenna receiving and transmitting signal, otherwise the antenna of switching access point makes access point built-in aerial receiving and transmitting signal.
2, the method for claim 1 is characterized in that, the radio frequency socket switch is set in described access point, and this radio frequency socket switch switches built-in aerial in the access point and external antenna.
3, the method for claim 1 is characterized in that, described access point built-in aerial is built-in microstrip antenna.
4, method as claimed in claim 3 is characterized in that, the built-in microstrip antenna of described access point is for falling L shaped metal antenna.
5, the method for claim 1 is characterized in that, described preset value is the least gain of access point external antenna.
6, the method for claim 1 is characterized in that, described step B further comprises:
The number of b1, the required access point of WLAN (wireless local area network) piconet is the value that the capacity of WLAN (wireless local area network) piconet obtains divided by the capacity of access point;
The value that the scope that b2, each access point cover obtains divided by the number of access point for this WLAN (wireless local area network) piconet coverage.
7, the method for claim 1 is characterized in that, at described access point two built-in microstrip antennas and two external antennas is set respectively, is used for space diversity reception.
8, the method for claim 1 is characterized in that, to the built-in aerial configuration impedance matching network of described access point.
9, method as claimed in claim 8 is characterized in that, this method also comprises: adopt distributed constant matching method, lumped parameter matching method or antenna pattern matching method configuration impedance matching network.
10, the method for claim 1 is characterized in that, described definite access point antenna gain further comprises:
C1, utilize the access point coverage to calculate the access point covering radius according to area formula of circle;
It is to add 92.4 values that obtain behind the logarithm of operating frequency of end access point that c2,20 multiply by with 10, and this value adds 20, and to multiply by with 10 be that the logarithm of end access point covering radius obtains the electric wave free-space loss;
C3, the power output of access point is set, the access point antenna gain is for after the portable terminal receiving sensitivity deducts the antenna gain of access point power output and portable terminal, adds the value that electric wave free-space loss and the fading margin of communicating by letter obtain.
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| CNB031425321A CN1298144C (en) | 2003-06-17 | 2003-06-17 | A method for implementing WLAN piconet networking |
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| CNB031425321A CN1298144C (en) | 2003-06-17 | 2003-06-17 | A method for implementing WLAN piconet networking |
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| JP4932187B2 (en) * | 2005-07-14 | 2012-05-16 | 古野電気株式会社 | Network and its management method |
| CN102215496B (en) * | 2011-06-13 | 2018-01-30 | 中兴通讯股份有限公司 | Outside antenna automatic switching method, apparatus and system in a kind of femto base station |
| CN103259548B (en) * | 2012-02-15 | 2015-06-24 | 联想(北京)有限公司 | Method and system of signal processing and mobile terminal |
| CN102882547A (en) * | 2012-10-15 | 2013-01-16 | 上海移远通信技术有限公司 | Antenna connecting circuit and communication device |
| CN106898878A (en) * | 2017-03-22 | 2017-06-27 | 奇酷互联网络科技（深圳）有限公司 | Antenna debugging method and mobile terminal |
| CN114285682A (en) * | 2020-09-17 | 2022-04-05 | 华为技术有限公司 | Control method and device for household equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1340932A (en) * | 2000-08-28 | 2002-03-20 | Lg电子株式会社 | Mail receiver/transmitter device for integrated wireless local loop and wireless domain net |
| CN1363150A (en) * | 2000-02-23 | 2002-08-07 | 皇家菲利浦电子有限公司 | Dual code communication system with receive antenna versity |
| WO2003021995A1 (en) * | 2001-09-04 | 2003-03-13 | Telefonaktiebolaget Lm Ericsson (Publ) | Integration of wireless lan and cellular distributed antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1363150A (en) * | 2000-02-23 | 2002-08-07 | 皇家菲利浦电子有限公司 | Dual code communication system with receive antenna versity |
| CN1340932A (en) * | 2000-08-28 | 2002-03-20 | Lg电子株式会社 | Mail receiver/transmitter device for integrated wireless local loop and wireless domain net |
| WO2003021995A1 (en) * | 2001-09-04 | 2003-03-13 | Telefonaktiebolaget Lm Ericsson (Publ) | Integration of wireless lan and cellular distributed antenna |
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