Communication channel system of selection and electronic installation thereofTechnical field
The present invention relates to a kind of communication channel system of selection and electronic installation thereof, particularly relate to a kind of communication channel system of selection and electronic installation thereof of avoiding two kinds of communications protocols to interfere with each other.
Background technology
The high frequency range epoch have been marched toward at present; In the idea of mechanics of communication last mile (Last Mile); Often visible with global intercommunication microwave access (Worldwide Interoperability for Microwave Access; Abbreviating WiMAX as) network equipment of communications protocol places and the final stage of network service provider (Internet Service Provider is called for short ISP) connects.The user of various local area network systems can connect the network equipment that is provided with the WiMAX communications protocol, obtains the service of high frequency range by this network equipment.In addition; Focus in the city (Hotspot) communication device has also been used this notion; At the focus communication device WiMAX communications protocol and modal radio area network communications protocol are set simultaneously; WiFi (Wireless Fidelity) communications protocol for example, the user can connect the focus communication device in the city by the electronic installation with WiFi communications protocol module, and this focus communication device is connected to the network service provider by the WiMAX communications protocol again.
Yet two kinds of communications protocol frequency bands are close in the focus communication device, may interfere with each other.For example WiMAX communications protocol and WiFi communications protocol coexist as in the focus communication device, and the WiMAX communications protocol operates in the frequency band of 2.3GHz~2.4GHz or 2.5GHz~2.7GHz, and the WiFi communications protocol operates in the frequency band of 2.4GHz~2.48GHz.When supporting the transceiver module power output of WiMAX communications protocol in the focus communication device, can have influence on the signal quality of the WiFi communications protocol transmitting-receiving in the focus communication device that coexists.Therefore, under such disturbing effect, can reduce whole volume of transmitted data (Throughput).
Be the physical phenomenon of avoiding interfering with each other; At present corresponding solution is that fixedly the WiFi communications protocol uses channel in apart from WiMAX frequency of operation WiFi channel far away, to ask for the stability of transfer of data under the environment that WiMAX communications protocol and WiFi communications protocol coexist.But this solution has limited the channel selection of WiFi communications protocol, and with making volume of transmitted data far below the volume of transmitted data when all WiFi communications protocol channels all can be selected, and the otherness that therefore causes is to be worth thinking improved.
Summary of the invention
The present invention provides a kind of communication channel system of selection and electronic installation thereof, to avoid or to alleviate the problem that interferes with each other between two kinds of communications protocols.
The present invention proposes a kind of electronic installation, and this electronic installation comprises first antenna element, second antenna element, first detecting unit, second detecting unit, memory cell and control unit.First antenna element is supported first communications protocol, and the frequency band of this first communications protocol is divided into a plurality of first channels.Second antenna element is supported second communications protocol, and the frequency band of this second communications protocol is divided into a plurality of second channels.First detecting unit is coupled to first antenna element and second antenna element, and first detecting unit is measured the transmission numerical value of above-mentioned a plurality of second channels when each first channel is used.Second detecting unit is coupled to second antenna element, in order to detect the radio access number of spots on each second channel.Memory cell is coupled to first detecting unit and second detecting unit, and memory cell provides memory space, in order to be stored in the transmission numerical value and the radio access number of spots of each first channel each second channel when being used.Control unit is coupled to memory cell, in order to according to transmission numerical value and radio access number of spots, in above-mentioned a plurality of second channels, selects second channel that uses simultaneously with first channel that is using.
In one embodiment of this invention; Above-mentioned control unit utilizes above-mentioned first antenna element to obtain first channel number of present use; And according to first channel number, in above-mentioned a plurality of second channels, at least one available channel that decision is corresponding; When the annoyance level between the above-mentioned available channel and first channel allows the above-mentioned available channel and first channel to use simultaneously; The transmission numerical value of above-mentioned available channel is more than or equal to stable transfer speed, and then according to the quantity of the radio access point of in each above-mentioned available channel, competing, one of them uses with first channel that uses at present simultaneously to choose above-mentioned available channel.
In one embodiment of this invention, the aforementioned stable transmission rate is the lowest data transmission rate of the second communications protocol defined.
In one embodiment of this invention; The transmission numerical value of each second channel when above-mentioned control unit is used according to each first channel number and each first channel is set up a look-up table; When record is used corresponding to first channel of each first channel number in the look-up table, each second channel that can use simultaneously with first channel, the control unit store look-up tables is in memory cell; And control unit utilizes look-up table, in each second channel, obtains above-mentioned available channel from look-up table according to first channel number.
In one embodiment of this invention, the above-mentioned control unit available channel of choosing the minimum number of the radio access point of competition in the above-mentioned available channel uses with first channel that uses at present simultaneously.
In one embodiment of this invention, if above-mentioned signal strength that radio access point is arranged is less than a threshold value, and then this radio access point is not included the quantity Calculation of the radio access point of above-mentioned competition in.
In one embodiment of this invention, above-mentioned first communications protocol is the radio wide area network communications protocol.
In one embodiment of this invention, above-mentioned radio wide area network communications protocol is advanced Long Term Evolution (3GPP LTE-Advanced) standard of global intercommunication microwave access (WiMAX) standard, third generation communication system partner Long Term Evolution (3GPP LTE) standard or third generation communication system partner.
In one embodiment of this invention, above-mentioned second communications protocol is the radio area network communications protocol.
In one embodiment of this invention, above-mentioned radio area network communications protocol is WiFi standard or 802.11 standards.
In one embodiment of this invention, above-mentioned 802.11 standards are 802.11a standard, 802.11b standard, 802.11g standard or 802.11n standard.
The present invention proposes a kind of communication channel system of selection, is carried out by an electronic installation, and this electronic installation is supported first communications protocol and second communications protocol; The frequency band of first communications protocol is divided into a plurality of first channels; The frequency band of second communications protocol is divided into a plurality of second channels, and this communication channel system of selection comprises: when each first channel is used, measure the transmission numerical value of above-mentioned a plurality of second channels; And the radio access number of spots on each second channel of detection; According to transmission numerical value and radio access number of spots, in above-mentioned a plurality of second channels, select second channel that uses simultaneously with first channel that is using.
Based on above-mentioned, communication channel system of selection of the present invention can be measured the disturbance regime between two kinds of communications protocols of same electronic installation, in electronic installation, stores the data of measuring gained.Then select the second available communications protocol channel by above-mentioned data; And according to the radio access number of spots in the above-mentioned available channel; One of them of decision available channel used with first channel that uses at present simultaneously; Avoiding or to alleviate two kinds of interference between the communications protocol, and then improve communication quality.
For making the above-mentioned feature and advantage of the present invention can be more obviously understandable, hereinafter is special lifts embodiment, and is described with reference to the accompanying drawings as follows.
Description of drawings
Fig. 1 is the functional block diagram according to a kind of electronic installation of one embodiment of the invention.
Fig. 2 is the flow chart according to a kind of communication channel system of selection of one embodiment of the invention.
Fig. 3 A and Fig. 3 B are the communication channel interference sketch mapes according to one embodiment of the invention.
Fig. 4 A and Fig. 4 B are the communication channel interference sketch mapes according to another embodiment of the present invention.
The reference numeral explanation
100: electronic installation
110: the first antenna elements
120: the second antenna elements
130: the first detecting units
140: the second detecting units
150: memory cell
160: control unit
210~230: process step
310,360,410,460:WiMAX frequency band
320,330,370,380,420,430,470,480:WiFi frequency band
XCH (0), XCH (1), XCH (2), XCH (3): WiMAX channel
Embodiment
Fig. 1 is the functional block diagram according to a kind of electronic installation of one embodiment of the invention; Fig. 2 is the flow chart according to a kind of communication channel system of selection of one embodiment of the invention; Please be simultaneously with reference to Fig. 1 and Fig. 2, the communication channel system of selection of Fig. 2 is carried out communication channel withelectronic installation 100 and is selected.Electronic installation 100 can be a similarly electronic installation such as mobile phone, personal digital assistant (personal digital assistant is called for short PDA), flat computer, mobile computer, desktop PC.As long as certain electronic installation supports multiple communications protocol, the frequency band of these communications protocols respectively is divided into a plurality of channels, and these communications protocols be because the frequency band that uses is near interfering with each other, and the communication channel system of selection of present embodiment promptly is suitable for.In addition;Electronic installation 100 is the focus communication device in the city also; Support two kinds of communications protocols, for example the user can be connected to the focus communication device through the WiFi communications protocol, and the focus communication device is connected to the network service provider through WiMAX again; Therefore, the communication channel system of selection of Fig. 2 also is applicable to the focus communication device.
Fig. 3 A and Fig. 3 B are that the communication channel of the embodiment of the invention disturbs sketch map.Theelectronic installation 100 of present embodiment is supported WiFi and these two kinds of communications protocols of WiMAX.The frequency band of WiFi is 2.4GHz to 2.48GHz, and the frequency band of WiMAX is 2.5GHz to 2.7GHz.The WiMAX channel that uses at present is by the decision of WiMAX base station, but electronic installation can be selected the employed channel of WiFi.Wherein, each WiFi channel is the different frequency that corresponds on the WiFi frequency band, and each WiMAX channel then corresponds to the different frequency on the WiMAX frequency band.
Shown in Fig. 3 A;WiMAX frequency band 310 is 2.5GHz to 2.7GHz; When the WiMAX channel in using belongs to midband or the high frequency band of this frequency band, be positioned at comparatively near the high frequency band of 2.7GHz like XCH (0) channel, this moment is under the interference that is not receiving WiMAX transmitting-receiving signal; WiFi can have more available channel selective from the paramount frequency band of low-frequency band.On the other hand; Fig. 3 A meta possibly disturbed by the transmitting-receiving signal of WiMAX at the channel ofWiFi frequency band 320; And be positioned at the channel ofWiFi frequency band 330, then for still keeping the channel of transmission numerical value more than or equal to the lowest data transmission rate of WiFi communications protocol defined.
Comparatively speaking; Shown in Fig. 3 B; WiMAX frequency band 360 is 2.5GHz to 2.7GHz, if when the WiMAX channel in using belongs to the low-frequency band in this frequency band, like XCH (1) channel comparatively near 2.5GHz; This moment, available channel that can be selective among the WiFi was then less under the interference that does not receive WiMAX transmitting-receiving signal.And in Fig. 3 B, the channel that is positioned at WiFi frequency band 370 possibly disturbed by the transmitting-receiving signal of WiMAX, and is positioned at the channel of WiFi frequency band 380, then for still keeping the channel of transmission numerical value more than or equal to the lowest data transmission rate of WiFi communications protocol defined.
Fig. 4 A and Fig. 4 B are the communication channel interference sketch mapes according to another embodiment of the present invention.WiMAX frequency band 410 is 2.3GHz to 2.4GHz; When if the WiMAX channel in using belongs to the low-frequency band in this frequency band; Comparatively near 2.3GHz, this moment, available channel that can be selective among the WiFi was then more under the interference that does not receive WiMAX transmitting-receiving signal like XCH (2) channel.And in Fig. 4 A, the channel that is positioned atWiFi frequency band 420 possibly disturbed by the transmitting-receiving signal of WiMAX, and is positioned at the channel ofWiFi frequency band 430, then for still keeping the channel of transmission numerical value more than or equal to the lowest data transmission rate of WiFi communications protocol defined.
Comparatively speaking; When the WiMAX channel in using belongs to midband or the high frequency band of this frequency band; Be positioned at comparatively near 2.4GHz like XCH (3) channel; The channel that is positioned atWiFi frequency band 470 this moment possibly disturbed by the transmitting-receiving signal of WiMAX, and is positioned at the channel ofWiFi frequency band 480, then for still keeping the channel of transmission numerical value more than or equal to the lowest data transmission rate of WiFi communications protocol defined.
And based on above in same electronic installation, the communication channel interference phenomenon of two kinds of communications protocols (WiMAX and WiFi) is described, below explanation communication channel system of selection and electronic installation thereof proposed by the invention.
Please be simultaneously with reference to Fig. 1 and Fig. 2.Electronic installation 100 comprisesfirst antenna element 110,second antenna element 120,first detecting unit 130,second detecting unit 140,memory cell 150 and control unit 160.Wherein,first antenna element 110 is supported first communications protocol, and the frequency band of this first communications protocol is divided into a plurality of first channels.Second antenna element 120 is supported second communications protocol, and the frequency band of this second communications protocol is divided into a plurality of second channels.
First detectingunit 130 is coupled tofirst antenna element 110 and second antenna element, 120, thefirst detecting units 110 when each first channel is used, and measures the transmission numerical value (Throughput) (step 210) of above-mentioned a plurality of second channels.Second detectingunit 140 is coupled tosecond antenna element 120, in order to detect radio access point (Access point) quantity (step 220) on each second channel.
Memory cell 150 is coupled to first detectingunit 130 and second detectingunit 140, andmemory cell 150 provides memory space, in order to be stored in the transmission numerical value and the radio access number of spots of each first channel each second channel when being used.Memory cell 150 in theelectronic installation 100 can be the storage device of any patterns such as floppy disk, storage card and hard disk, but is not limited to above-mentioned.
Control unit 160 is coupled tomemory cell 150, in order to according to transmission numerical value and radio access number of spots, in above-mentioned a plurality of second channels, selects second channel (step 230) that uses simultaneously with first channel that is using.The detailed execution mode ofcontrol unit 160 is thatcontrol unit 160 utilizesfirst antenna element 110 to obtain first channel number of present use, and according to first channel number, in above-mentioned a plurality of second channels, at least one available channel that decision is corresponding.
And available channel be defined as and first channel between annoyance level; In the time of can allowing the available channel and first channel to use simultaneously; The transmission numerical value of available channel is more than or equal to stable transfer speed, and wherein stable transfer speed is the lowest data transmission rate of the second communications protocol defined.For example in the present embodiment; The WiFi available channel is defined as and can uses simultaneously with the WiMAX channel that is using and not disturbed by WiMAX transmitting-receiving signal power or only receive slight interference, still can keep the channel of transmission numerical value more than or equal to the lowest data transmission rate of WiFi communications protocol defined.The lowest data transmission rate of above-mentioned WiFi communications protocol defined can be referred to as stable transfer speed.
In addition, a look-up table also capable of using is obtained above-mentioned available channel.The transmission numerical value of each second channel whencontrol unit 160 is used according to each first channel number and each first channel is set up look-up table; When record is used corresponding to first channel of each first channel number in this look-up table; Each second channel of using simultaneously of first channel therewith; And these look-up tables ofcontrol unit 160 storage are inmemory cell 150, andcontrol unit 160 utilizes this look-up table, according to first channel number since then look-up table in each second channel, obtain above-mentioned available channel.
Then, according to the quantity of the radio access point of in each available channel, competing, the available channel thatcontrol unit 160 is chosen the minimum number of the radio access point of competition in the available channel uses with first channel that uses at present simultaneously.Wherein, less than a threshold value, then this radio access point is not included the quantity Calculation of the radio access point of above-mentioned competition in as if the signal strength that radio access point is arranged.
And in the present embodiment, this communication channel system of selection is used in the situation that Wimax and two kinds of communications protocols of WiFi use simultaneously, execution mode such as following.At first, obtain the channel number of the WiMAX of present use,, obtain at present corresponding WiFi available channel then according to the WiMAX channel number from first antenna element 110.In look-up table; The WiFi available channel of corresponding each WiMAX channel maybe be not only one; This moment is according to the radio access number of spots of competing in each WiFi available channel;Control unit 160 is chosen one of them WiFi available channel and is used simultaneously with the WiMAX channel that is using, and in the present embodiment,control unit 160 is chosen at the WiFi available channel of the radio access point minimum number of competition in the above-mentioned available channel.
After look-up table is obtained at present corresponding WiFi available channel; Electronic installation is obtained the radio access number of spots of competing in each WiFi available channel; And the signal strength of each above-mentioned radio access point (Received Signal Strength Indicator, RSSI) information.Radio access point in above-mentioned WiFi available channel; If the signal strength that has radio access point is less than threshold value (this threshold value is by the systemic presupposition of electronic installation); Then this radio access point is not included the radio access point quantity Calculation of above-mentioned competition in; A plurality of radio access point are for example arranged in the competition channel right to use in a certain available channel of WiFi, but the signal strength that 1 radio access point is wherein arranged is less than threshold value, at this moment this radio access point is not then included counting in.For example shown in the form 1, this moment, WiFi had 5 available channels available, and each available channel has corresponding radio access number of spots, and then deduction falls the radio access number of spots of signal strength less than threshold value, the radio access number of spots after obtaining filtering.Filter out after the more weak radio access point of signal strength according to above-mentioned steps; Electronic installation is chosen the WiFi available channel of present radio access point minimum number; Use simultaneously with the WiMAX channel that is using; Like the WiFi channel of the numbering in the form 14, the radio access number of spots after the filtration is minimum, and thencontrol unit 160 selects this channel and the WiMAX channel that is using to use simultaneously.
Form 1
In sum, the present invention finds out corresponding WiFi available channel according to the transmitting-receiving signal power of WiMAX at each channel, and stores these corresponding measurement results in this electronic installation.Electronic installation can be according to measurement result afterwards, the radio access number of spots of competing in each available channel according to WiFi, decision this moment the WiFi channel that will use.The communication channel system of selection that the present invention proposes; No longer just as in the past solution; Avoid interference with the fixing channel of WiFi, and provide a plurality of WiFi available channels and utilize above-mentioned system of selection to come dynamically adjustment, in the hope of enlarging the message transmission rate of WiFi.Thus, electronic installation just can use WiFi and WiMAX communications protocol simultaneously, and the problem that can avoid both to interfere with each other.In addition, must explanation be that the WiMAX and the WiFi frequency band of various countries' defined is not quite similar, but the application of present embodiment is not limited to above-mentioned WiMAX and WiFi frequency band range.
In addition; The electronic installation of present embodiment is supported WiFi and these two kinds of communications protocols of WiMAX; But scope of the present invention is not limited to this; More than two kinds of communications protocols can be replaced into connatural other communications protocols, wherein the WiMAX communications protocol can replace with the radio wide area network communications protocol of other form, for example third generation communication system partner Long Term Evolution (3RdGeneration Partnership Project Long Term Evolution, 3GPP LTE) standard, or advanced Long Term Evolution (3GPP LTE-Advanced) standard of third generation communication system partner.And the WiFi communications protocol can replace with the radio area network communications protocol of other form; The additional version of 802.11 standards of IEEE (IEEE) or 802.11 standards for example is like 802.11a standard, 802.11b standard, 802.11g standard or 802.11n standard.
Though the present invention discloses as above with embodiment; Right its is not in order to qualification the present invention, those skilled in the art, under the premise without departing from the spirit and scope of the present invention; Can do some changes and retouching, so protection scope of the present invention is to be as the criterion with claim of the present invention.