CN101253731A - Method and apparatus for increasing data throughput - Google Patents

Abstract

Methods and apparatus for using primary direction of data flow to increase data throughput are disclosed. A wireless cell and/or client detects noise sources, detects the channels used by the noise sources, determines the primary direction of data flow, and selects a channel for communication between the wireless cell and client that reduces noise source interference with the primary direction of data flow.

Description

Be used to improve the method and apparatus of data throughout

Cross reference to related application

The application is the part of the following application application case that continues, and require its priority and rights and interests thereof: in the U.S. Patent application S/N.10/869 of submission on June 15th, 2004,201 and the U.S. Patent application S/N.10/880 that submits on June 29th, 2004,387, these two patent applications are all quoted by integral body and are herein incorporated.The application also requires the priority and the rights and interests thereof of following application: the U.S. Provisional Patent Application S/N.60/692 that submits on June 21st, 2005,490 and the U.S. Provisional Patent Application S/N.60/743 that submits on March 29th, 2006,897, these two patent applications are all quoted by integral body and are herein incorporated.

Points for attention about material protected by copyright

Some is protected by copyright under the U.S. and other national Copyright Laws for material in the application's document.Everyone of these copyrights does not oppose anyone to patent document or patent disclosure appears at the file that openly can get of United States Patent (USP) trademark office by it or the former state in the record is opened up system, if not in any case but so then all keep all copyrights.

Background of invention

Invention field

The present invention relates generally to radio communication, relate in particular to the apparatus and method of the data throughout that is configured to improve radio honeycomb, wireless client and wireless network.

Description of Related Art

Many systems include communication protocol, least interference channel and directional antenna in to improve communicating by letter between radio honeycomb and the wireless client.In order further to improve data throughout, wireless device can be benefited from detection and utilize the main direction of data flow to select antenna and/or channel.

The invention brief overview

The present invention utilizes the main direction of data flow to select directional antenna and/or channel to overcome the restriction and the problem of prior art with the method and apparatus that improves data throughout by providing.In one embodiment, when data owner will flow on predetermined direction, directional antenna reduced noise jamming.In another embodiment, the wireless device that has an omnidirectional antenna according to the main direction selective channel of data flow to improve data throughout.In another embodiment, the wireless device that has a directional antenna according to the main direction selective channel of data flow to improve data throughout.

Accompanying drawing is briefly described

Can obtain the present invention is understood more completely with reference to detailed description and claims in conjunction with the drawings, Reference numeral identical in the accompanying drawing is indicated similar key element all the time, and:

Fig. 1 is the sketch of the radio honeycomb with an omnidirectional antenna according to one embodiment of the present of invention, the client with an omnidirectional antenna, noise source and the main direction of data flow from the client to the radio honeycomb;

Fig. 2 is the sketch of the radio honeycomb with an omnidirectional antenna according to one embodiment of the present of invention, the client with an omnidirectional antenna, noise source and the main direction of data flow from the radio honeycomb to the client;

Fig. 3 is the radio honeycomb with an omnidirectional antenna according to one embodiment of the present of invention, the sketch with client and two noise sources of an omnidirectional antenna;

Fig. 4 is the sketch of the radio honeycomb with an omnidirectional antenna according to one embodiment of the present of invention, the client with a directional antenna, noise source and the main direction of data flow from the client to the radio honeycomb;

Fig. 5 is the sketch of the radio honeycomb with an omnidirectional antenna according to one embodiment of the present of invention, the client with a directional antenna, noise source and the main direction of data flow from the radio honeycomb to the client;

Fig. 6 is the sketch of the radio honeycomb with an omnidirectional antenna according to one embodiment of the present of invention, the client with a plurality of directional antennas, noise source and the main direction of data flow from the radio honeycomb to the client;

Fig. 7 is the sketch of the radio honeycomb with an omnidirectional antenna according to one embodiment of the present of invention, the client with a directional antenna, two noise sources and the main direction of data flow from the client to the radio honeycomb;

Fig. 8 is the sketch of the radio honeycomb with an omnidirectional antenna according to one embodiment of the present of invention, the client with a directional antenna, two noise sources and the main direction of data flow from the radio honeycomb to the client;

Fig. 9 is the sketch of the radio honeycomb with a directional antenna according to one embodiment of the present of invention, the client with a directional antenna, two noise sources and the main direction of data flow from the client to the radio honeycomb;

Figure 10 is the sketch of the radio honeycomb with a directional antenna according to one embodiment of the present of invention, the client with a directional antenna, two noise sources and the main direction of data flow from the radio honeycomb to the client;

Figure 11 is the sketch of the radio honeycomb with a plurality of directional antennas according to one embodiment of the present of invention, the client with a plurality of directional antennas, two noise sources and the main direction of data flow from the radio honeycomb to the client;

Figure 12 is the sketch of the radio honeycomb with a directional antenna according to one embodiment of the present of invention, the client with a directional antenna, three noise sources and the main direction of data flow from the client to the radio honeycomb;

Figure 13 is the sketch of the radio honeycomb with a directional antenna according to one embodiment of the present of invention, the client with a directional antenna, three noise sources and the main direction of data flow from the radio honeycomb to the client;

Figure 14 is the sketch of the radio honeycomb with an omnidirectional antenna according to one embodiment of the present of invention, the client with an omnidirectional antenna, three noise sources and the main direction of data flow from the client to the radio honeycomb; And

Figure 15 is the sketch of the radio honeycomb with an omnidirectional antenna according to one embodiment of the present of invention, the client with an omnidirectional antenna, three noise sources and the main direction of data flow from the radio honeycomb to the client.

The detailed description of exemplary embodiment

The detailed description of exemplary embodiment of the present is carried out reference to the accompanying drawing that shows exemplary embodiment machine optimal mode by diagram herein.Those skilled in the art can put into practice the present invention although these embodiment are described in sufficient detail, be to be understood that also to realize other embodiment, and can make logic and machinery change and can not break away from the spirit and scope of the present invention.Thus, detailed description herein only provides for the non-limiting purpose of illustration.For example, the step of any one narration in method or process prescription can be carried out by any order and not be subject to given order.

For simplicity's sake, may not encyclopaedize for the aspect of routine herein.In addition, the module position shown in each accompanying drawing that is comprised herein is intended to represent example functional relationships and/or the physical coupling between these different assemblies.Should be noted that and many replacements or functional relationship that adds or physical connection in real system, may occur.Can understand as those of ordinary skills, the present invention can be embodied as self-defined, addition product, autonomous system and/or the distributed system of existing system.Correspondingly, the present invention can take the embodiment of complete hardware or make up the form of embodiment of the aspect of software and hardware.

In brief, the present invention includes radio honeycomb, wireless client and the method that is used to improve data throughout.About data throughout, comprise the bit number that per second transmits and/or receives at this employed term " throughput ".Throughput can be divided into two classes usually, i.e. total throughout and can use data throughout.Total throughout is included in all bits that each time period transmits and/or receives between two equipment.For example, total throughout comprises the data and the data of the desired expense of communication protocol, re-transmission." can use data throughout " at this used term and comprise the real data that each time period transmits and/or receives.For example, the bit that can use data throughout not comprise to be exclusively used in expense, correction bits and the data that retransmit.Can use data throughout to be also referred to as " data throughout " at this.For example, data throughout also can be described on the meaning of minimum, maximum and average data throughput.The data bit number that comprises transmission and/or reception at this used term " average data throughput " is divided by transmitting and/or time of reception length.Be included at this used term " maximum data throughput " and transmit and/or the maximum data bit number of each time period that reception period is measured.Be included at this used term " minimum data throughput " and transmit and/or the minimum data bit number of each time period that reception period is measured.

Data throughout can be expressed as the bit number of per second.Data throughout may be subjected to following factor affecting, for example, the existence of noise, receives wrong, multipath signal and may cause that communication equipment reduces other factors of its transfer rate and data retransmission.For example, influence, the minimizing re-transmission that receives need, be increased transmission and/or receiving velocity, the available transmission of increase and/or receive bandwidth, channel allocation, directional antenna, Bandwidth Management, bandwidth priorization, client load balance, the main direction of data flow, client first level, application priority, decay input signal and agreement selection by reducing noise, can improve data throughout.

As the method that improves throughput, be included in the direction that the most of data between two equipment transmit about the direction of utilizing data flow at this used term " the main direction of data flow ".For example, referring to Fig. 2, suppose that client 18 moving Video Applications and receiving video data from radio honeycomb 10.The data major part that flows between radio honeycomb 10 and client 18 is to flow to client 18 from radio honeycomb 10.Therefore, the main direction of data flow is from radio honeycomb 10 to client 18.Client 18 can transmit repeat requests or state information, but in typical Video Applications, and the data that client 18 receives from radio honeycomb 10 are more than its data that transmit to radio honeycomb 10.

Especially, in one embodiment of the invention, radio honeycomb and/or client detect noise source, detect the employed channel of each noise source, specified data flows main direction, and select to be used between this radio honeycomb and this client communicate by letter reduce channel to the noise source interference of the main direction of this data flow.In an exemplary embodiment, selected channel makes the noise source interference to the main direction of data flow minimize, even the interference of the non-main direction of data flow may be minimized.

And there are some to comprise distance, key data flow path direction, signal strength signal intensity and channel allocation between omnidirectional antenna, directional antenna, certain orientation antenna direction, noise source and the receiving equipment among the example of the main directional correlation of data flow connection and the embodiment.These examples and embodiment are as explanation and unrestricted providing.Can use any form or have any antenna that needs characteristic that closes.Some illustrative properties comprise gain, coverage angle, active element number and antenna signal attenuation degree dorsad.Antenna can point to by any way.Physical sector can be overlapping or not overlapping.Radio honeycomb or client can be used the antenna of arbitrary number.Each antenna of any wireless device can side by side or individually use.Select the criterion of use which or which antenna can utilize any tolerance, for example, signal to noise ratio, noise source signal strength signal intensity, data throughout, error rate, transmission liveness and retransmission rate.Each radio honeycomb and/or client can have the radio of arbitrary number and/or other electronic components to use these antenna.

The main direction of data flow can be to take office what his wireless device from any wireless device, for example, radio honeycomb arrives a plurality of clients to client, client to a plurality of radio honeycombs and radio honeycomb to radio honeycomb, client to radio honeycomb, radio honeycomb to client, client.The main direction of data flow can be static basically, perhaps can dynamically change.The channel that is used to communicate by letter can change independently, or with the change of duty factor, for example with the change of the main direction of data flow, noise source to changes such as moving of the change of the change of the use of channel, noise source position and client with meeting.The transmit signal strength of various wireless devices and/or noise source can be uniform or change.Can give any wireless device and/or any channel of antenna assignment.For example, can give radio honeycomb and client distribution identical channel with noise source, different least interference channels can be assigned to the different antennae of single wireless device, and channel can be allocated to different with noise source, and channel allocation can be static or can dynamically change.

Can improve data throughout by detecting and utilize the main direction of data flow.In one embodiment, referring to Fig. 1, radio honeycomb 10 and client 18 have the omnidirectional antenna that forms physical sector 12 and 74 respectively.In one embodiment, the major part of communicating by letter between client 18 and the radio honeycomb 10 is by 10 transmission constitutes from client 18 to radio honeycomb.In such operational environment, the main direction of data flow be from client 18 to radio honeycomb 10 (such as arrow 72 description).In another embodiment, noise source 60 is on the channel identical with client 18 and radio honeycomb 10---for example upload carry information at channel C1.The equipment of any kind all may be as noise source work, for example, and the radio honeycomb that in the frequency range of being paid close attention to, transmits, client, cell phone and/or any wireless device.From the transmission of noise source 60 (by arrow 76 expressions) may arrive client 18 and radio honeycomb 10 both, therefore when being received, may disturb transmission from client 18 from the transmission of noise source 60 by radio honeycomb 10.When the main direction of data flow is inverted (referring to the arrow among Fig. 2 72), from the transmission of noise source 60 may still can arrive client 18 and radio honeycomb 10 both, therefore when being received, may disturb transmission from radio honeycomb 10 from the transmission of noise source 60 by client 18.

Even when client 18 and radio honeycomb 10 all used omnidirectional antenna, environmental condition and the distance from the noise source to the receiving equipment combined with the main direction of data flow, also can improve data throughout.For example, referring to Fig. 3, radio honeycomb 10 and client 18 are placed in the room that is surrounded by wall 78.Noise source 60 is placed on the outside in room, and noise source 62 is in the inside in room.For this embodiment, noise source 60 with 62 both all in the channel identical, transmit with radio honeycomb 10 and client 18.In one exemplary embodiment, client 18 and noise source 62 are placed as illustrated in fig. 3 to be left radio honeycomb 10 segment distance 80 is arranged, and noise source 60 is placed as and leaves client 18 segment distance 80 is arranged.When the main direction of data flow is from client 18 during to radio honeycomb 10 (indicated as arrow 72), from the signal of client 18 and noise source 62 segment distance arrival radio honeycomb 10 after 80s of advancing; And arrive radio honeycomb 10 after the distance from signal travel distance 80 twices of noise source 60.

In one embodiment, client 18 and noise source 60 transmit on identical power level and with roughly the same transmission liveness with 62.Estimating respectively provides how utilizing the main direction of data flow to improve seeing clearly of data throughout from the signal of client 18 signal to noise ratio (" SNR ") with respect to the noise of noise source 60 and noise source 62.Following equation is that the simplification of the SNR of the noise source of each independent action is estimated.Calculating needs complicated equation about the SNR of a plurality of noise sources of working simultaneously on same channel.The application's equation does not need signal to simplify calculating with respect to the SNR of the signal of single noise source by not providing additivity to analyze disturbing to close as other noise sources.

Referring to Fig. 3, the main direction of data flow is from client 18 to radio honeycomb 10 the exemplary embodiment therein, can arrive radio honeycomb 10 after distance 80 the segment distance and estimates from the signal of client 18 SNR with respect to the noise of noise source 62 by noticing that the signal that transmits from client 18 and noise source 62 has advanced to have.For the distance of being advanced, when being received by radio honeycomb 10, from the signal of client 18 with respect to SNR (SNR (@wirelesscell10) from the noise of noise source 62) can be estimated as:

$\mathrm{SNR}(@\mathrm{wirelesscell}10)\&ap;10\log \left(\frac{{\mathrm{<figure-callout\; id="80"\; label="D"\; filenames="S2006800270485E00021.png,S2006800270485E00041.png"\; state="\{\{state\}\}">D</figure-callout>}80}^2}{{\mathrm{<figure-callout\; id="80"\; label="D"\; filenames="S2006800270485E00021.png,S2006800270485E00041.png"\; state="\{\{state\}\}">D</figure-callout>}80}^2}\right)\&ap;10\log \left(1\right)\&ap;0\mathrm{dB}$

The SNR of the 0dB that the result obtains mean radio honeycomb 10 comparably perception from the signal of client 18 with from the noise of noise source 62.When estimating from the signal of client 18, arrive radio honeycomb 10 after the segment distance from signal travel distance 80 twices of noise source 60 with respect to the SNR of the noise of noise source 60.The distance of between client 18, noise source 60 and radio honeycomb 10, advancing for signal, when being received by radio honeycomb 10, from the signal of client 18 with respect to SNR (SNR (@wirelesscell10) from the noise of noise source 60) can be estimated as:

$\mathrm{SNR}(@\mathrm{wirelesscell}10)\&ap;10\log \left(\frac{{(2*D80)}^2}{{\mathrm{<figure-callout\; id="80"\; label="D"\; filenames="S2006800270485E00021.png,S2006800270485E00041.png"\; state="\{\{state\}\}">D</figure-callout>}80}^2}\right)\&ap;10\log \left(4\right)\&ap;6\mathrm{dB}$

Item " D80 " is writing a Chinese character in simplified form of distance 80.The SNR of the 6dB that the result obtains means that than the noise from noise source 60 radio honeycomb 10 can be easier to the signal of perception from client 18.Under the situation without any other factors, when the main direction of data flow is from client 18 during to radio honeycomb 10,60 pairs of noise sources are little from the interference ratio noise source 62 of the transmission of client 18.For the given main direction of data flow, environmental factor (such as wall 78) also can work in the interference that is caused by noise source.Be conveyed through the signal strength signal intensity of the about 5dB of signal possible loss of plaster wall.The noise that noise source 60 is transmitted passed wall 78 before arriving radio honeycomb 10.From the signal strength signal intensity of noise source 60 signals reduce cause being approximately 11dB with respect to noise SNR from noise source 60 at the signal from client 18 by radio honeycomb 10 perception and/or when receiving.Because noise source 62 be with radio honeycomb 10 together in the room, so its signal did not pass wall 78 before arriving radio honeycomb 10, the signal of client 18 does not improve because of the existence of wall 78 with respect to the SNR of the noise of noise source 62 like this.

When the main direction of data flow is from client 18 during to radio honeycomb 10, wall 78 can improve data throughout by weakening by noise source 60 caused interference.When the main direction of data flow is from radio honeycomb 10 during to client 18, wall 78 still provides benefit, but the amount of benefit can reduce, and this is because receiving equipment is a client 18 than being from client 18 more close noise source 60 during to radio honeycomb 10 in the main direction of data flow.

Based on the estimation of above equation, at the embodiment shown in Fig. 3, radio honeycomb 10 and/or client 18 can take any action and improve data throughout.For example, radio honeycomb 10, client 18 and noise source 60 are switched to the different channel of channel that uses with noise source 62 can improve data throughout, can be alleviated because the strongest interference source is a noise source 62.In another embodiment, be switched in radio honeycomb 10 and the client 18 with noise source 60 and 62 both channels of using neither with channel.Another embodiment depends on the emission liveness of noise source 62.In noise source 62 indexing transfers and significantly be less than under the situation of noise source 60, can noise source 60 use different channels improve data throughout by radio honeycomb 10, client 18 and noise source 62 are switched to identical channel.Although for the main direction of data flow, stronger from the interference of noise source 62 interference in self noise source 60 recently, do not take place so not frequent from the interference of noise source 62 from the interference of noise source 60.The action of the raising data throughout of being taked is influenced by the emissive porwer of each noise source also may.The SNR estimate equation is supposed the intensity emission of each noise source to equate; Yet the signal strength signal intensity that equates not is a necessary condition.Consider the main direction of data flow, radio honeycomb 10 and client 18 can be used the channel of the more weak interference signal intensity of carrying.

In a kind of distortion of the embodiment of Fig. 3, the main direction of data flow is 18 (not shown Fig. 3) from radio honeycomb 10 to client, ignore any loss of passing wall 78, when being received by client 18, from the signal of radio honeycomb 10 with respect to SNR (SNR (@client18) from the noise of noise source 60) can be estimated as:

$\mathrm{SNR}(@\mathrm{client}18)\&ap;10\log \left(\frac{{\mathrm{<figure-callout\; id="80"\; label="D"\; filenames="S2006800270485E00021.png,S2006800270485E00041.png"\; state="\{\{state\}\}">D</figure-callout>}80}^2}{{\mathrm{<figure-callout\; id="80"\; label="D"\; filenames="S2006800270485E00021.png,S2006800270485E00041.png"\; state="\{\{state\}\}">D</figure-callout>}80}^2}\right)\&ap;10\log \left(1\right)\&ap;0\mathrm{dB}$

The loss of considering to pass wall 78 can improve the SNR about noise source 60.When being perceived by client 18, the signal of radio honeycomb 10 is with respect to the SNR of the noise of noise source 62 (SNR (@client18) only) can be estimated as:

$\mathrm{SNR}(@\mathrm{client}18)\&ap;10\log \left(\frac{{(2*D80)}^2}{{\mathrm{<figure-callout\; id="80"\; label="D"\; filenames="S2006800270485E00021.png,S2006800270485E00041.png"\; state="\{\{state\}\}">D</figure-callout>}80}^2}\right)\&ap;10\log \left(4\right)\&ap;6\mathrm{dB}$

Based on the estimation of above two equations, the main direction of change data flow has changed the possible interference volume from noise source.Radio honeycomb 10 and/or client 18 can improve data throughout by taking to be similar to the above action of taking.For example, radio honeycomb 10, client 18 and noise source 62 are switched to the different channel of channel that uses with noise source 60.In addition, when noise source 60 indexing transfers, radio honeycomb 10, client 18 and noise source 62 are switched to the channel different with noise source 60.

Can be by giving at least one directional antenna of customer premises equipment and placing antenna physical sectors according to the main direction of data flow and improve data throughout.In one exemplary embodiment, referring to Fig. 4, client 18 has a directional antenna that forms physical sector 74.Radio honeycomb 10 has an omnidirectional antenna that forms physical sector 12.In this embodiment, client 18 is placed as and makes its directional antenna oriented towards wireless cell 10 and away from noise source 60.In one embodiment, noise source 60 is uploaded carry information at the channel identical with client 18 and radio honeycomb 10, for example, transmits on channel C1.Also to flow main direction be 10 (indicated as arrow 72) from client 18 to radio honeycomb to tentation data.Even client 18 has directional antenna, but because radio honeycomb 10 has omnidirectional antenna and the main direction of data flow is to enter in the radio honeycomb 10, so may disturb transmission to a certain extent from client 18 from the transmission of noise source 60.

Because the placement of directional antenna makes the main direction counter-rotating of data flow (referring to the arrow among Fig. 5 72) can improve data throughout.Noise source 60 is launched from the directional antenna back side to client 18.Directional antenna decay is from the signal of the direction emission different with this antenna direction pointed.In this embodiment, the directional antenna of client 18 receive transmission from radio honeycomb 10 (such as arrow 72 description); Yet, from the signal of noise source 60 (such as arrow 76 description) be attenuated.Therefore, client 18 perceives that recently the signal of the direction in self noise source 60 is stronger from the signal of the direction of radio honeycomb 10.In this embodiment, referring to Fig. 5, when the main direction of data flow is from radio honeycomb 10 during to client 18, data throughout can be improved, because when being received by client 18, signal (arrow 72) with respect to the signal to noise ratio of noise (arrow 76) than when the main direction of data flow be from client 18 during to radio honeycomb 10 (as shown in Figure 4) higher.As shown in Figure 5, even when noise source 60, client 18 are all used identical channel with radio honeycomb 10, the sensing of the directional antenna of client 18 is with 18 the main direction of data flow (referring to line 72) combines the raising that data throughout also can be provided from radio honeycomb 10 to client.

In another embodiment, client 18 has a plurality of directional antennas that physical sector may be overlapping.For example, referring to Fig. 6, client 18 has six directional antennas that form physical sector 74,78,80,82,84 and 86, and these physical sectors overlap to form virtual sectors.The direction that each antenna direction is different.A plurality of directional antennas make client 18 can be used provides the optimum data throughput to the given main direction of data flow one and/or a plurality of antenna.Can use any criterion to select client 18 employed these one or more antennas by any way, these criterions have for example noise ratio, data throughout, error rate and signal strength signal intensity.In the embodiment shown in Fig. 6, the antenna that forms physical sector 74 can produce the data throughout higher than other antennas, because its more directly oriented towards wireless cell 10 and noise source 60 more dorsad.

In utilizing an embodiment of directional antenna, referring to Fig. 7, client 18 is used the single directional antenna of the physical sector 74 of the direction that forms oriented towards wireless cell 10 and noise source 62.Noise source 60 is placed on outside the room that is formed by wall 78, and noise source 62 is in the room.As top performed, can estimate the SNR of each noise source with respect to the main direction of data flow.For from the signal of client 18 with respect to situation, from a segment distance of signal travel distance 80 before arriving radio honeycomb 10 of client 18 and noise source 62 emissions from the SNR of the noise of noise source 62.The distance of advancing for signal, when being received by radio honeycomb 10, from the signal of client 18 with respect to SNR (SNR (@wirelesscell10) from the noise of noise source 62) can be estimated as:

$\mathrm{SNR}(@\mathrm{wirelesscell}10)\&ap;10\log \left(\frac{{\mathrm{<figure-callout\; id="80"\; label="D"\; filenames="S2006800270485E00021.png,S2006800270485E00041.png"\; state="\{\{state\}\}">D</figure-callout>}80}^2}{{\mathrm{<figure-callout\; id="80"\; label="D"\; filenames="S2006800270485E00021.png,S2006800270485E00041.png"\; state="\{\{state\}\}">D</figure-callout>}80}^2}\right)\&ap;10\log \left(1\right)\&ap;0\mathrm{dB}$

For from the signal of client 18 situation with respect to the SNR of the noise of noise source 60, from a segment distance of signal travel distance 80 before arriving radio honeycomb 10 of client 18 emission, and from a segment distance of signal travel distance 80 twices before arriving radio honeycomb 10 of noise source 60.For the distance of being advanced, when being received by radio honeycomb 10, from the signal of client 18 with respect to only from the SNR (SNR (@wirelesscell10) of the noise of noise source 60) can be estimated as:

$\mathrm{SNR}(@\mathrm{wirelesscell}10)\&ap;10\log \left(\frac{{(2*D80)}^2}{{\mathrm{<figure-callout\; id="80"\; label="D"\; filenames="S2006800270485E00021.png,S2006800270485E00041.png"\; state="\{\{state\}\}">D</figure-callout>}80}^2}\right)\&ap;10\log \left(4\right)\&ap;6\mathrm{dB}$

Wall 78 also can improve the SNR of noise source 60, but can not improve the SNR of noise source 60.For the resulting SNR value of result, can improve data throughout by the interference that takes action at first reduce from noise source 62.Then, can improve data throughout extraly by the interference that reduces from noise source 60.This type of action can comprise, for example, radio honeycomb 10, client 18 and noise source 60 switched to the channel different with noise source 62; Radio honeycomb 10 and client 18 are switched to and noise source 60 and 62 both all different channels; And radio honeycomb 10 and client 18 switched to by the minimum employed channel of noise source of emission liveness.

The main direction counter-rotating of data flow can be changed realize the method for the data throughout that improves.In one exemplary embodiment, referring to Fig. 8, the main direction of data flow (arrow 72) is from radio honeycomb 10 to client 18.Because the direction of the directed noise source 62 of directional antenna that client 18 is used, so the signal (arrow 82) of noise source 62 emissions is received by client 18.Noise source 60 transmits (arrow 76) to the direction of client 18, but they are directed antenna and decay.Wall 78 not only can deamplification but also can reflected signal, and for example, the signal of being launched 76 can pass wall 78, advancing passes across room, reflection and leave the inner surface of wall 78 and advance towards client 18 to the direction that client 18 can received signal 76.As top performed, can estimate the SNR of each noise source.For from the signal of radio honeycomb 10 with respect to situation from the SNR of the noise of noise source 62, from the distance of signal travel distance 80 before arriving client 18 of radio honeycomb 10 emission, and from the distance of signal travel distance 80 twices before arriving client 18 of noise source 62.The distance of advancing for signal, when being received by client 18, from the signal of radio honeycomb 10 with respect to only from the SNR (SNR (@client18) of the noise of noise source 62) can be estimated as:

$\mathrm{SNR}(@\mathrm{client}18)\&ap;10\log \left(\frac{{(2*D80)}^2}{{\mathrm{<figure-callout\; id="80"\; label="D"\; filenames="S2006800270485E00021.png,S2006800270485E00041.png"\; state="\{\{state\}\}">D</figure-callout>}80}^2}\right)\&ap;10\log \left(4\right)\&ap;6\mathrm{dB}$

For from the signal of radio honeycomb 10 situation, from a segment distance of signal travel distance 80 before arriving client 18 of radio honeycomb 10 emissions with respect to the SNR of the noise signal of noise source 60.Ignore from signal noise source 60, that be attenuated in the behind of the directional antenna of client 18, from the distance of the signal of noise source 60 80 5 times of travel distances before arriving client 18.For the distance of being advanced, when being received by client 18, from the signal of radio honeycomb 10 with respect to only from the SNR (SNR (@client18) of the noise of noise source 60) can be estimated as:

$\mathrm{SNR}(@\mathrm{client}18)\&ap;10\log \left(\frac{{(5*D80)}^2}{{\mathrm{<figure-callout\; id="80"\; label="D"\; filenames="S2006800270485E00021.png,S2006800270485E00041.png"\; state="\{\{state\}\}">D</figure-callout>}80}^2}\right)\&ap;10\log \left(25\right)\&ap;14\mathrm{dB}$

Can be by considering that wall 78 improves the SNR ratio of radio honeycomb 10 with respect to noise source 60.For the embodiment of Fig. 8, directional antenna is with the main direction combination of 18 data flow need not further that action just can improve SNR with respect to the embodiment of Fig. 7 from radio honeycomb 10 to client.Yet, as described previously, at first reduce interference from noise source 62 by taking action and reduce interference then from noise source 60, can further improve SNR.

Radio honeycomb 10 is equipped with at least one directional antenna and client 18 is equipped with the analysis classes of effect of the embodiment of an omnidirectional antenna is similar to radio honeycomb 10 is had an omnidirectional antenna and client 18 has the analysis of at least one directional antenna for the main direction of data flow, as top analyze.Usually, make directional antenna point to away from noise source and point to the main direction of data flow and tend to improve SNR and data throughout.When considering the main direction of data flow, can further improve data throughout for radio honeycomb 10 and client 18 channel allocation different with the channel of nearest noise source use.

Give client 18 and radio honeycomb 10 both all equip the data throughout that at least one directional antenna can improve each key data direction of the traffic.In one embodiment, referring to Fig. 9, radio honeycomb 10 has a directional antenna that forms physical sector 66.The directional antenna oriented towards client 18 of radio honeycomb 10 and away from noise source 62.Client 18 has a directional antenna of the physical sector 74 that forms oriented towards wireless cell 10 and away from noise source 60.Arrow 72 designation datas flow main direction, and are represented by arrow 76 and 82 respectively from the emission of noise source 60 and 62.Enter the directional antenna of radio honeycomb 10 from the emission of noise source 60, and disturb to a certain extent from the transmission of client 18 to radio honeycomb 10.From the emission of noise source 62 from behind convergence radio honeycomb 10 directional antenna and be attenuated.Client 18 and radio honeycomb 10 switched to work on the different channel of the channel that uses with noise source 60 can reduce emission from noise source 60, improved throughput thus the interference that radio honeycomb 10 receives from the data of client 18.

Make the counter-rotating of key data flow path direction,, just change the reception which noise source may be disturbed client 18 places referring to Figure 10.May disturb the data of client 18 receptions from the emission of noise source 62 from radio honeycomb 10.From the emission of noise source 60 from behind convergence client 18 directional antenna and be attenuated.Is the channel-changing of radio honeycomb 10 and client 18 uses that the channel that is different from noise source 62 uses can reduce the interference that 62 pairs of clients of noise source 18 receive from the data of radio honeycomb 10, thereby improves data throughout.Radio honeycomb 10 and/or client 18 can have a plurality of directional antennas, shown in the embodiment of Fig. 6 and 11.Radio honeycomb 10 and/or client 18 can use any method to select and/or a plurality of antenna that is used to communicate by letter.

When radio honeycomb 10 and client 18 used directional antennas, environmental condition and noise source combine with the main direction of data flow from the distance of receiving equipment can improve data throughout.In one embodiment, referring to Figure 12, radio honeycomb 10 and client 18 are placed in the room that is formed by wall 78.Client 18 is used the single directional antenna of the physical sector 74 of the direction that forms oriented towards wireless cell 10, noise source 62 and noise source 64.Radio honeycomb 10 uses the single directional antenna of the physical sector 66 of the direction that forms oriented towards client 18 and noise source 60.Noise source 60 and 64 is placed on outside the room and noise source 62 is in the room.Client 18 and noise source 62 are placed as leaves radio honeycomb 10 distance 80, and noise source 60 is placed as leaves client 18 distances 80, and noise source 64 is placed as and leaves noise source 62 distances 80.The main direction of data flow (by arrow 72 indication) is from client 18 to radio honeycomb 10.Signal travel distance 80 before being received from client 18 by the directional antenna of radio honeycomb 10.From the signal of noise source 62,60 and 64 before being received, advanced respectively three times of distance 80, twice and four times (line 82,76 and 90) by the directional antenna of radio honeycomb 10.For from the signal of client 18 with respect to situation, from a segment distance of signal travel distance 80 before arriving radio honeycomb 10 of client 18 emissions from the SNR of the noise of noise source 60.Yet, from a segment distance (referring to line 76) of the signal 60 of noise source travel distance 80 twices before arriving radio honeycomb 10.For the distance of being advanced, when being received by radio honeycomb 10, from the signal of client 18 with respect to SNR (SNR (@wirelesscell10) from the noise of noise source 60) can be estimated as:

$\mathrm{SNR}(@\mathrm{wirelesscell}10)\&ap;10\log \left(\frac{{(2*D80)}^2}{{\mathrm{<figure-callout\; id="80"\; label="D"\; filenames="S2006800270485E00021.png,S2006800270485E00041.png"\; state="\{\{state\}\}">D</figure-callout>}80}^2}\right)\&ap;10\log \left(4\right)\&ap;6\mathrm{dB}$

Can improve the SNR ratio of client 18 by considering the decay of passing wall 78 with respect to noise source 60.For from the signal of client 18 situation with respect to the SNR of the noise of noise source 62, from the signal (referring to line 82) of noise source 62 emissions across the room, from the inside part reflection of wall 78 and enter the directional antenna of radio honeycomb 10.Distance from the signal of noise source 62 80 3 times of travel distances before arriving radio honeycomb 10.In one embodiment, the reflection from the surface, inside of wall 78 is harmless or basic harmless.For the distance of being advanced, when being received by radio honeycomb 10, from the signal of client 18 with respect to SNR (SNR (@wirelesscell10) from the noise of noise source 62) can be estimated as:

$\mathrm{SNR}(@\mathrm{wirelesscell}10)\&ap;10\log \left(\frac{{(3*D80)}^2}{{\mathrm{<figure-callout\; id="80"\; label="D"\; filenames="S2006800270485E00021.png,S2006800270485E00041.png"\; state="\{\{state\}\}">D</figure-callout>}80}^2}\right)\&ap;10\log \left(9\right)\&ap;9.5\mathrm{dB}$

Client 18 than not passing wall 78, and is benefited from the decay of noise source with respect to the SNR of noise source 62 when passing wall.For from the signal of client 18 situation, from the distance of the signal (referring to line 90) of noise source 64 emissions 80 4 times of travel distances before arriving radio honeycomb 10 with respect to the SNR of the noise of noise source 64.For these distances, when being received by radio honeycomb 10, from the signal of client 18 with respect to SNR (SNR (@wirelesscell10) from the noise of noise source 64) can be estimated as:

$\mathrm{SNR}(@\mathrm{wirelesscell}10)\&ap;10\log \left(\frac{{(4*D80)}^2}{{\mathrm{<figure-callout\; id="80"\; label="D"\; filenames="S2006800270485E00021.png,S2006800270485E00041.png"\; state="\{\{state\}\}">D</figure-callout>}80}^2}\right)\&ap;10\log \left(16\right)\&ap;12\mathrm{dB}$

Can improve the SNR ratio of client 18 by considering the decay of passing wall 78 with respect to noise source 64.Estimation based on three above-mentioned equations, for at the embodiment shown in Figure 12, by taking at first to reduce interference from noise source 60, then reducing any action that reduces the interference of noise source 64 from the interference of noise source 62, then, radio honeycomb 10 and/or client 18 can improve data throughout.For example, consider the main direction of data flow, by switching to and noise source 60 and the 62 different channels of channel that use, even this channel may be the same channel that noise source 64 is used, radio honeycomb 10 and client 18 also can reduce the interference from these two nearest noise sources.

Make the method for flow main direction counter-rotating can the change data throughout of realizing raising of data.In another embodiment, referring to Figure 13, the main direction of data flow (arrow 72) is from radio honeycomb 10 to client 18.According to the above analytical method that provides, only provide the equation of estimating SNR.When being received, from the signal of radio honeycomb 10 SNR (SNR (@client18) with respect to the noise of noise source 62 by client 18) can be estimated as:

$\mathrm{SNR}(@\mathrm{client}18)\&ap;10\log \left(\frac{{(2*D80)}^2}{{\mathrm{<figure-callout\; id="80"\; label="D"\; filenames="S2006800270485E00021.png,S2006800270485E00041.png"\; state="\{\{state\}\}">D</figure-callout>}80}^2}\right)\&ap;10\log \left(4\right)\&ap;6\mathrm{dB}$

When being received, from the signal of radio honeycomb 10 SNR (SNR (@client18) with respect to the noise of noise source 64 by client 18) can be estimated as:

$\mathrm{SNR}(@\mathrm{client}18)\&ap;10\log \left(\frac{{(3*D80)}^2}{{\mathrm{<figure-callout\; id="80"\; label="D"\; filenames="S2006800270485E00021.png,S2006800270485E00041.png"\; state="\{\{state\}\}">D</figure-callout>}80}^2}\right)\&ap;10\log \left(9\right)\&ap;9.5\mathrm{dB}$

When being received, from the signal of radio honeycomb 10 SNR (SNR (@client18) with respect to the noise of noise source 60 by client 18) can be estimated as:

$\mathrm{SNR}(@\mathrm{client}18)\&ap;10\log \left(\frac{{(5*D80)}^2}{{\mathrm{<figure-callout\; id="80"\; label="D"\; filenames="S2006800270485E00021.png,S2006800270485E00041.png"\; state="\{\{state\}\}">D</figure-callout>}80}^2}\right)\&ap;10\log \left(25\right)\&ap;14\mathrm{dB}$

Estimation based on above-mentioned three equations, for the embodiment shown in Figure 13, by take at first to reduce interference from noise source 62, then reduce interference from noise source 64, succeeded by any action that reduces from the interference of noise source 60, radio honeycomb 10 and/or client 18 can improve data throughout.

In another embodiment, referring to Figure 14, radio honeycomb 10 and client 18 have omnidirectional antenna.An exemplary wireless cell 10 is the compatible access points of I.E.E.E.802.11a/b/g.An exemplary client 18 is the compatible clients of I.E.E.E.802.11a/b/g, for example, and mobile computer. Exemplary noise sources 60,62 and 64 is used different 802.11a/b/g least interference channels separately, for example, uses channel 1, channel 6 and channel 11 respectively.Because radio honeycomb 10 and client 18 have omnidirectional antenna, both all receive the noise signal from each noise source 60-64.Use when radio honeycomb 10 and client 18 the main direction of data flow is had minimum interference and/or when the channel of the highest SNR communicates, can realize high-throughput.In this embodiment, the main direction of data flow is from client 18 to radio honeycomb 10.Noise source 60 is positioned at than noise source 62 and 64 positions farther apart from radio honeycomb 10, and therefore when radio honeycomb 10 and client 18 use channels 1 but not channel 6 or 11 when communicating, data throughout can be enhanced.The direction that changes data flow has changed the channel that the maximum data throughput can be provided.

Referring to Figure 15, radio honeycomb 10 communicates with client 18, and wherein key data stream is from radio honeycomb 10 to client 18. Noise source 60,62 and 64 has been assigned with channel 1, channel 6 and channel 11 respectively.Noise source 62 and 64 is left the distance that client 18 equates, and both are all big to the distance of client 18 than noise source 60 to the distance of client 18, therefore for the main direction of data flow, when radio honeycomb 10 and client 18 or when using channel 6 or using 11, data throughout can be enhanced.The embodiment that directional antenna is used for Figure 14 and 15 can also improve SNR and data throughout, but can comprise different channel allocation.Which noise source directional antenna can change and provide maximum interference to the main direction of given data flow.Using directional antenna to reduce in the system of nearest noise source to the interference of the main direction of data flow, also can carry out channel allocation.

And the main direction that does not require channel allocation and/or data flow is static.When the main direction of data flow changed, channel allocation also can change over the configuration that the main direction of this new data flow is provided the SNR and/or the data throughout of raising.Can realize testing environment influence and system operation in any way, for example, channel, data throughout and the signal strength signal intensity of the main direction of data flow, interference, SNR, noise source from noise source.

Although above description comprises many details, these should not be interpreted as limiting scope of the present invention, but provide purely some illustration in all exemplary embodiments of the present invention.Therefore, can understand scope of the present invention and contain conspicuous other embodiment of possibility to those skilled in the art fully, and scope correspondingly of the present invention is not subjected to other anything the qualification except that appended claims, in appended claims, the citation to key element of singulative is not to be intended to expression " having and only have " unless dominance ground multiplier like this but should be represented " one or more ".Those of ordinary skills known to all structures of the key element of above-mentioned exemplary embodiment, equivalence chemistry and function is quoted clearly includes in this, and be intended to be contained by claims of the present invention.In addition, necessary each problem of seeking by the present invention's solution that solves of equipment or method could be contained by claims of the present invention.In addition, be intended to open to the public no matter whether dominance ground statement in claims of these key elements, assembly or method step during the present invention is open without any key element, assembly or method step.Should under the regulation of the 6th section of 35 U.S.C.112, explain without any the claim key element herein, unless use phrase " be used for ... device " state this key element clearly.As using in this article, term " comprises ", " comprising " or its any other distortion are intended to contain nonexcludability and comprise, thereby comprise that the process, method, article of a row key element or device not only comprise those elements, but can comprise clearly do not list or this class process, method, article or install other intrinsic key elements.In addition, which does not have is that to put into practice the present invention necessary to the key element of Miao Shuing herein, unless be explicitly described as " necessary " or " conclusive ".

Claims (22)

1. method of being convenient to realize the raising of data throughout, described method comprises:

Determine the most main direction of the data flow between radio honeycomb equipment and client device, wherein said radio honeycomb equipment is configured to use first channel in a plurality of channels wirelessly to communicate by letter with described client device, and in wherein said radio honeycomb equipment and the described client device at least one is named as among most receiving equipment that receives described data flow and the most transmitter of the launching described data flow at least one;

From the viewpoint of described receiving equipment measure in each signal to noise ratio, transmitter signal strength signal intensity, data throughout, error rate and the retransmission rate of noise source signal strength signal intensity, noise source emission liveness, transmitter signal and noise source described a plurality of channels at least one of them; And,

Based on described measuring process, distribute in described a plurality of channel one for described transmitter and described receiving equipment.

2. the method for claim 1 is characterized in that, described allocation step comprise distribute described channel with make it with have highest ranking and greater than predetermined grade the two one of any channel of noise source signal strength signal intensity different.

3. the method for claim 1 is characterized in that, described allocation step comprise utilize transmitter signal and noise source be highest ranking and greater than predetermined grade in the two at least the noise of one of them recently distribute.

4. the method for claim 1 is characterized in that, described allocation step comprise distribute to utilize be highest ranking and greater than predetermined grade in the two at least the transmitter signal strength signal intensity of one of them distribute.

5. the method for claim 1 is characterized in that, described allocation step comprise utilize be highest ranking and greater than predetermined grade in the two at least the data throughout of one of them distribute.

6. the method for claim 1 is characterized in that, described allocation step comprise utilize be the lowest class and less than predetermined grade in the two at least the error rate of one of them distribute.

7. the method for claim 1 is characterized in that, described allocation step comprise utilize be the lowest class and less than predetermined grade in the two at least the retransmission rate of one of them distribute.

8. the method for claim 1 is characterized in that, described allocation step comprise utilize be the lowest class and less than predetermined grade in the two at least the noise source emission activity of one of them distribute.

9. method of being convenient to realize the raising of data throughout, described method comprises:

Set up radio communication between radio honeycomb equipment and client device, wherein said radio honeycomb equipment is configured to use first channel in a plurality of channels wirelessly to communicate by letter with described client device;

For in described a plurality of channels each, measure the data throughout of the data that data that described radio honeycomb equipment receives and described client device receive, wherein

At least one that receives the maximum data throughput in described radio honeycomb equipment and the described client device is named as receiving equipment, and is named as transmitter except that described at least one another in described radio honeycomb equipment and the described client device;

A called after receive channel that receives the maximum data throughput in described a plurality of channels;

Distribute data flows main direction, wherein the major part of the data of between described radio honeycomb and described client, communicating by letter be to use described receive channel from described transmitter to described receiving equipment emission.

10. method as claimed in claim 9, it is characterized in that, also comprise by described receiving equipment monitoring data throughput, in the time of wherein under described data throughout is reduced to predetermined threshold value, described radio honeycomb equipment and described client device are carried out described measuring process, described name step and described allocation step.

11. method as claimed in claim 9, it is characterized in that, also comprise by described transmitter monitoring data throughput, in the time of wherein under described data throughout is reduced to predetermined threshold value, described radio honeycomb and the described measuring process of described client executing, described name step and described allocation step.

12. a method of being convenient to realize the raising of data throughout, described method comprises:

Set up radio communication between radio honeycomb equipment and client device, wherein said radio honeycomb equipment is configured to use first channel in a plurality of channels wirelessly to communicate by letter with described client device;

Determine the most main direction of the data flow between described radio honeycomb equipment and described client device, receive in wherein said radio honeycomb equipment and the described client device described data flow most at least one be named as receiving equipment, and in wherein said radio honeycomb equipment and the described client device the described data flow of emission most at least one be named as transmitter;

From the angle of described receiving equipment, measure in each signal to noise ratio, transmitter signal strength signal intensity, data throughout, error rate and the retransmission rate of the emission of noise source signal strength signal intensity, noise source liveness, transmitter signal and noise source in described a plurality of channel at least one of them;

Based on described measuring process, distribute in described a plurality of channel one for described transmitter and described receiving equipment;

By described receiving equipment and described transmitter monitor in the main direction of data flow, noise source signal strength signal intensity, noise source emission liveness, data throughout, error rate and the retransmission rate at least one of them, greater than the change of predetermined threshold value; And

When described monitoring step detects described change, repeat described measuring process and described allocation step.

13. a method of being convenient to realize the raising of data throughout, described method comprises:

Determine the main direction of data flow between radio honeycomb equipment and client device, wherein said radio honeycomb equipment is configured to use two channels wirelessly to communicate by letter with described client device, and wherein said radio honeycomb equipment has at least two directional antennas, described client device has an omnidirectional antenna, and at least one that receives described data flow in wherein said radio honeycomb equipment and the described client device is named as receiving equipment, and launch described data flow at least one be named as transmitter;

Measure the data throughout that described receiving equipment receives;

Repeat described measuring process in each and the described channel in the described directional antenna each; And

Distribute of the maximum data throughput directional antenna and a channel are provided in described directional antenna and the described channel.

14. method as claimed in claim 13, also comprise by described receiving equipment monitoring data throughput, in the time of wherein under described data throughout is reduced to predetermined threshold value, described radio honeycomb equipment and described client device are carried out described determining step, described measuring process, described repeating step and described allocation step.

15. method as claimed in claim 13, also comprise by described transmitter monitoring data throughput, in the time of wherein under described data throughout is reduced to predetermined threshold value, described radio honeycomb equipment and described client device are carried out described determining step, described measuring process, described repeating step and described allocation step.

16. method as claimed in claim 13, comprise that also described radio honeycomb equipment and described client device place with respect to noise source in environment, arrive described receiving equipment again after wherein passing the object of the described signal that is adapted in the described environment to decay from the signal of described noise source.

17. method as claimed in claim 13, comprise that also described radio honeycomb equipment and described client device place with respect to noise source in environment, arrive described receiving equipment again after wherein passing the wall that is arranged in described environment from the signal of described noise source.

18. a method of being convenient to realize the raising of data throughout, described method comprises:

Determine the main direction of data flow between radio honeycomb equipment and client device, wherein said radio honeycomb equipment is configured to use two channels wirelessly to communicate by letter with described client device, and wherein said radio honeycomb equipment has an omnidirectional antenna, described client device has at least two directional antennas, and at least one that receives described data flow in wherein said radio honeycomb equipment and the described client device is named as receiving equipment, and launch described data flow at least one be named as transmitter;

Measure the data throughout that described receiving equipment receives;

In each and the described channel in the described directional antenna each repeated described measuring process; And

Distribute of the maximum data throughput directional antenna and a channel are provided in the described directional antenna and in the described channel.

19. method as claimed in claim 18, also comprise by described receiving equipment monitoring data throughput, in the time of wherein under described data throughout is reduced to predetermined threshold value, described radio honeycomb equipment and described client device are carried out described determining step, described measuring process, described repeating step and described allocation step.

20. method as claimed in claim 18, also comprise by described transmitter monitoring data throughput, in the time of wherein under described data throughout is reduced to predetermined threshold value, described radio honeycomb equipment and described client device are carried out described determining step, described measuring process, described repeating step and described allocation step.

21. method as claimed in claim 18, comprise that also described radio honeycomb equipment and described client device place with respect to noise source in environment, just arrive described receiving equipment after wherein passing the object of the described signal that is adapted in the described environment to decay from the signal of described noise source.

22. method as claimed in claim 18, comprise that also described radio honeycomb equipment and described client device place with respect to noise source in environment, just arrive described receiving equipment after wherein passing the wall that is positioned in the described environment from the signal of described noise source.

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