CN109495154A - Relay apparatus, radio relay method - Google Patents

Relay apparatus, radio relay method Download PDF

Info

Publication number
CN109495154A
CN109495154A CN201811468892.2A CN201811468892A CN109495154A CN 109495154 A CN109495154 A CN 109495154A CN 201811468892 A CN201811468892 A CN 201811468892A CN 109495154 A CN109495154 A CN 109495154A
Authority
CN
China
Prior art keywords
radio communication
channel
communication channel
communication
relay apparatus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201811468892.2A
Other languages
Chinese (zh)
Other versions
CN109495154B (en
Inventor
塚本贵士
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yamaha Corp
Original Assignee
Yamaha Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yamaha Corp filed Critical Yamaha Corp
Publication of CN109495154A publication Critical patent/CN109495154A/en
Application granted granted Critical
Publication of CN109495154B publication Critical patent/CN109495154B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Abstract

Can not make the convenience of Wireless LAN reduces, and measures in the operational process of relay apparatus to the behaviour in service of radio communication channel, and effectively utilizes multiple radio communication channels and improve the convenience of Wireless LAN.A kind of relay apparatus is provided, selecting unit is included, selects multiple radio communication channels each touringly；And communication control unit, communication control unit, it is communicated via at least one for the radio communication channel selected by the selecting unit touringly with wireless terminal device, and for each for the radio communication channel selected by the selecting unit touringly, it executes via at least any one party in the communication of the channel and the measurement of the electric wave state of the channel, the selecting unit selects the multiple radio communication channel each in a manner of discontinuously selecting the radio communication channel for the measurement for only carrying out electric wave state among the multiple radio communication channel.

Description

Relay apparatus, radio relay method
The application is that the China national application number 201380010041.2 proposed based on 2 28th, 2013 applies for (wireless Relay, radio relay method, control method, control program and recording medium) divisional application, it is referenced below in it Hold.
Technical field
The present invention relates to the wireless relay that Wireless LAN (Local Area Network) is together constituted with wireless terminal device Device and radio relay method.
Background technique
As Wireless LAN communication standard and it has been known that there is IEEE802.11.The communication standard is generally divided into use The standard of the standard (IEEE802.11b etc.) of the communication electric wave of 2.4GHz frequency band and the communication electric wave using 5GHz frequency band (IEEE802.11a etc.).2.4GHz frequency band and 5GHz frequency band are respectively also divided into multiple radio communication channels.For example, in day This, the 2.4GHz frequency band of IEEE802.11b is divided into 14 radio communication channels for being separated by 5MHz.Generally, it is filled with wireless terminal Set together constitute with wireless access point device of Wireless LAN etc. relay apparatus it is corresponding with some in this 2 frequency bands, Gu Surely it is communicated using some in the radio communication channel in the frequency band with wireless terminal device.Therefore, again When relay apparatus is set, for each radio communication channel in frequency band corresponding to the relay apparatus, need to it The behaviour in service being arranged around position is investigated (wireless survey, site survey), and less wireless communication letter is interfered in selection Road.
However, since the behaviour in service moment of communication electric wave is all changing, only it is arranged sometimes in relay apparatus Shi Jinhang wireless survey is not enough.For example, there are following situations: be provided with relay apparatus after, with this it is wireless in It is adjacent to after device and constructs new Wireless LAN etc. and only exist in the interference source for occurring electric wave afterwards or even if having existed The interference source of specific time-bands operating, but the interference source sometimes also can be inoperative once in a while in wireless survey.Therefore, it is proposed to For solving the problems, such as this various technical solutions, as wherein an example, skill disclosed in patent document 1 can be enumerated Art.
In patent document 1, it discloses for the relay apparatus in operation process and records surrounding channel radio Believe the behaviour in service of channel and the technology of presence of interference.Relay apparatus disclosed in patent document 1 is during operation A certain regularly send the special beacon (monitoring beacon) for indicating that measurement starts.Expression is provided in the monitoring beacon constant Period incommunicado CFP parameter.Each wireless terminal device in above-mentioned relay apparatus is contained in receive above-mentioned prison Beacon is regarded as opportunity and new communication is forbidden to start (transmission of communication electric wave) during corresponding to represented by CFP parameter, and is right The electric wave of surrounding BSS is scanned.Also, each wireless terminal device receive above-mentioned monitoring beacon have passed through again it is above-mentioned constant After time (that is, after releasing is forbidden), its scanning result is sent back to above-mentioned relay apparatus.Each wireless terminal device exists Communicating received radio frames of forbidden period is sent from the adjacent relay apparatus of surrounding.By will be from each wireless The information of terminal installation transmitting is recorded in above-mentioned relay apparatus, to realize the use to surrounding radio communication channel The record of situation and presence of interference.
Patent document 1: Japanese Patent 4654507
Patent document 2: Japanese Patent 3821220
Non-patent literature 1: " MultiNet:Connecting to Multiple IEEE802.11Networks Using A Single Wireless Card ", Ranveer Chandar, Paramvir Bahl, PradeepBahl, Proceeding Of IEEE infocom 2004, March 7-11,2004, < http://research.microsoft.com/en-us/ Um/redmond/projects/virtualwifi/multinet_infocom.pdf >
Summary of the invention
However, in technology disclosed in patent document 1, when the electric wave of BSS is scanned to around every time, Dou Yaojin Therefore the communication for all wireless terminal devices being only contained in relay apparatus causes throughput to decline.In addition, special In technology disclosed in sharp document 1, due to by CFP along for monitoring purposes, therefore, it is impossible to be used for CFP as intended use PCF access (access carried out by poll from relay apparatus).In this way, in technology disclosed in patent document 1 There are the following problems: causing the convenience of Wireless LAN (to may have access to due tos utilizing and apply restriction etc. because of the decline of throughput, to CFP Property) reduce.
The present invention proposes that the 1st purpose is that Wireless LAN can not be made just in view of project described above Benefit reduces, and measures in the operational process of relay apparatus to the behaviour in service of radio communication channel, the 2nd purpose It is to improve the convenience of Wireless LAN and effectively utilizing multiple radio communication channels.
In order to solve the above problems, one embodiment of the present invention provides a kind of relay apparatus, the relay apparatus Selecting unit is included, selects multiple radio communication channels each touringly；And communication control unit, for by Each for the radio communication channel that the selecting unit is selected touringly, execute via the radio communication channel and with it is wireless At least one party of the measurement of the electric wave state of the communication of terminal installation and the radio communication channel, the communication control unit Via at least one of the radio communication channel by going out selected by the selecting unit, execute and the wireless terminal device Communication.According to this relay apparatus, as long as example, carried out at least one in multiple radio communication channels with it is wireless The communication of terminal installation carries out the survey of electric wave state in the radio communication channel for including (or removing) radio communication channel Amount, it will be able to the measurement of the behaviour in service of channel is carried out wireless communication in the operational process of relay apparatus.Also, from Multiple radio communication channels select 1 radio communication channel touringly when, electric wave state is only carried out by discontinuously selecting The radio communication channel of measurement, declines to a great extent so as to the amount of avoiding passing through.In addition, passing through the measurement for making only to carry out electric wave state Channel quantity less than communication channel quantity or will be for the radio communication channel for the measurement for only carrying out electric wave state Selection frequency per unit time inhibits lower, also can be avoided throughput and declines to a great extent.As long as in addition, in multiple channel radios Believe the communication carried out in channel with wireless terminal device, it will be able to effectively utilize these multiple radio communication channels and improve nothing The convenience of line LAN.
Herein, above-mentioned multiple radio communication channels may belong to 1 frequency band, in addition, above-mentioned multiple radio communication channels It may belong to multiple frequency bands.Also, each in multiple radio communication channels is belonging respectively in multiple frequency bands different from each other A certain frequency band in the case where, communication control unit can be made for belonging to predetermined frequency band in these radio communication channels Radio communication channel and only carry out the measurement of the electric wave state of the radio communication channel.As mentioned earlier, as current is wireless The communication standard of LAN, exist using 2.4GHz frequency band communication electric wave standard with use 5GHz frequency band communication electric wave mark This 2 kinds quasi- a possibility that (as an example, exist according to communication standard and using other frequency bands).Above-mentioned different from each other multiple In the case that frequency band is respectively above-mentioned 2.4GHz frequency band and 5GHz frequency band, as long as example, by each channel radio of 2.4GHz frequency band Believe that for the communication with wireless terminal device, the measurement of behaviour in service is only carried out for the radio communication channel of 5GHz frequency band for channel (each frequency band can be used alternatively, can also overturn).
Relay apparatus corresponding with the both sides of 2.4GHz frequency band and 5GHz frequency band is disclosed in patent document 2.Specially Relay apparatus disclosed in sharp document 2 has receiving unit corresponding with each communication standard and transmission unit, for receiving unit, It acts receiving unit corresponding with each communication standard always, for transmission unit, as needed and only acts a side. Hereby it is achieved that the reduction of consumption power.In this way, the invention of patent document 2 is different from the present invention, it is disclosed Patent Document 2 The purpose of relay apparatus is, by only making one in transmission unit corresponding with 2.4GHz frequency band and 5GHz frequency band Side is acted as needed and drops low consumpting power, and the purpose of the present application is, realization does not make Wireless LAN just Benefit measures the behaviour in service of radio communication channel in the operational process of relay apparatus in the case where reducing, and has The convenience of Wireless LAN is improved using multiple radio communication channels in effect ground.
In addition, other way is characterized in that, there is channel load rate measuring unit, the multiple wireless communication is believed It is being used to measure with the channel load rate of the radio communication channel of the communication of wireless terminal device in road, the selection Unit be directed to be used for the radio communication channel of the communication of wireless terminal device each, according to by the channel load The channel load rate that rate measuring unit is measured is adjusted during being in selection state to the radio communication channel.For example, During selection by shortening the lighter radio communication channel of channel load rate, on the contrary, lengthening the heavier nothing of channel load rate During the selection of line communication channel, thus, it is possible to more efficiently use each radio communication channel.
In addition, as other way and it is conceivable that such as under type: monitoring result reflection unit is additionally provided with, to described It is being used to carry out with presence of interference in the radio communication channel of the communication of wireless terminal device in multiple radio communication channels Determine, in the case where being determined to have interference, to the radio communication channel, logical for the communication with the wireless terminal device Letter speed and send power at least some change.According to this mode, for logical with wireless terminal device In the radio communication channel of letter in the case where discovery interference, switching, the messaging parameter (communication of communication object channel are automatically carried out Speed sends power) adjustment etc. for improving the movement of communication conditions.
In addition, other way is characterized in that, storage unit is also included；And authentication control unit, via described In multiple radio communication channels some from wireless terminal device receive certification request be opportunity and authenticated, authenticating In successful situation, the terminal identifier for indicating the wireless terminal device and the radio communication channel are written in association to institute Storage unit is stated, the communication control unit is received during non-selected radio communication channel to use the wireless communication to believe In the case that the wireless terminal device in road is the data of destination, by the data and the radio communication channel be written in association to The storage unit by the selecting unit is selected as opportunity with the radio communication channel and by the data to the wireless end again End device is sent.According to this mode, be used to be selected again with the radio communication channel of the communication of wireless terminal device When, the data communication carried out in upper primary selection can be restored.
In addition, other way is characterized in that, the communication control unit is directed to before switching radio communication channel just In the wireless terminal device that the electric wave using the radio communication channel before switching is communicated, it is emitted in until the wireless communication is believed Road forbids new communication to start instruction be selected as only next time during.According to this mode, having been used for and wireless end During the radio communication channel of the communication of end device is unselected, it can be avoided the wireless terminal device and carry out useless data It sends.In addition, disclosing following technology in non-patent literature 1: other wireless switching to linking objective from certain wireless network When network switching, enter battery saving mode to communication object (the relay apparatus or wireless terminal device) notice before the switching, Inhibit the transmission towards the useless frame of the present apparatus.However, the dress for the case where entering battery saving mode can be notified to communication object Only wireless terminal device is set, technology disclosed in Non-Patent Document 1 is and the sheet as the invention for being related to relay apparatus Entirely different technology is invented in application.
Other way of the invention provides a kind of radio relay method, is the wireless relay side in relay apparatus Method selects each of multiple radio communication channels in the method touringly, for the channel radio selected touringly Believe each of channel, executes communication and the radio communication channel via the radio communication channel and with wireless terminal device Electric wave state measurement at least one party, and via at least one of selected radio communication channel, execute with it is described The communication of wireless terminal device.
Other way of the invention provides a kind of control method, is the control method of the processing unit of relay apparatus, In the method, the processing unit is controlled in such a way that alternatively unit and communication control are acted, wherein institute State selecting unit select touringly multiple radio communication channels each, the communication control unit is directed to by the selection singly Member select touringly radio communication channel each, execute via the radio communication channel and with wireless terminal device At least one party of the measurement of the electric wave state of communication and the radio communication channel, the communication control unit are controlled as, and are passed through As at least one of the radio communication channel by going out selected by the selecting unit, execute logical with the wireless terminal device Letter.
Other way of the invention provides a kind of control program, makes the processing unit of relay apparatus alternatively unit And communication control unit is acted, wherein the selecting unit selects each of multiple radio communication channels touringly, The communication control unit is directed to each for the radio communication channel selected touringly by the selecting unit, execute via The radio communication channel and the measurement of the electric wave state of communication and the radio communication channel with wireless terminal device are at least One side, the communication control unit are controlled as via the radio communication channel by going out selected by the selecting unit at least 1, execute the communication with the wireless terminal device.
Other way of the invention provides a kind of for storing non-volatile recording medium of above-mentioned control program.
Detailed description of the invention
Fig. 1 is the figure for indicating the structural example of relay apparatus 1A of the 1st embodiment of the invention.
Fig. 2 is the figure for illustrating the effect of the 1st embodiment.
Fig. 3 is the figure for indicating the structural example of relay apparatus 1B of the 2nd embodiment of the invention.
Fig. 4 is the figure for indicating an example of variation of the 2nd embodiment.
Fig. 5 is the figure for indicating an example of variation of the 2nd embodiment.
Fig. 6 is the figure for indicating the structural example of relay apparatus 1C of the 3rd embodiment of the invention.
Fig. 7 is the flow chart for indicating an example of movement of the 3rd embodiment.
Fig. 8 is the figure for illustrating the effect of the 3rd embodiment.
Fig. 9 is the figure for indicating the structural example of relay apparatus 1D of the 4th embodiment of the invention.
Figure 10 is the flow chart for indicating an example of movement of the 4th embodiment.
Figure 11 is the block diagram for indicating the outline structure of relay apparatus involved in the embodiments of the present invention.
Figure 12 is to indicate communication control performed in the relay apparatus involved in the embodiments of the present invention An example flow chart.
Specific embodiment
(outline structure)
Figure 11 is the block diagram for indicating the Sketch of relay apparatus involved in the embodiments of the present invention.
Relay apparatus in bus 27 include processing unit, operation portion 21, the 1st radio section 23, the 2nd radio section 25 and Antenna 24,26, the processing unit include CPU (Central Processing Unit) 11, ROM (Read Only Memory) 12, RAM(Random Access Memory)13。
It is set with CPU 11 in RAM 13 and executes used working region when communication control program.It is deposited in ROM 12 Contain the basic program of the application program for executing the wireless terminal device.ROM 12 is, for example, flash memory, in addition to basic program In addition, additionally it is possible to store the application program etc. of downloading.
Operation portion 21 indicates that the operation for being sent to relay apparatus detects to from user by various.Operation portion 21 Structure is not required in that relay apparatus also can be set to the structure that instruction is received from other equipment.According to 11 institute of CPU The communication control program of execution, via the portion 1RF 23 and antenna 24 or the portion 2RF 25 and antenna 26 with other nothings Line equipment is communicated.
Figure 12 is to indicate communication control performed in the relay apparatus involved in the embodiments of the present invention An example flow chart.
In step sl, CPU 21 selects 1 radio communication channel from multiple radio communication channels.21 pairs of CPU selections Radio communication channel out whether be channel for being communicated via the channel with wireless terminal device or for pair The channel that the electric wave state for the channel selected measures is determined (step S2).It is in the radio communication channel selected In the case where channel for being communicated via the channel with wireless terminal device, CPU21 via with select it is wireless The corresponding radio section of communication channel (portion 1RF 23 and antenna 24 or the portion 2RF and antenna 26) and execute with it is wireless eventually The communication (step S3) of end device.It on the other hand, is for the electricity to the channel selected in the radio communication channel selected In the case where the channel that wavy state measures, CPU 21 measures (step S4) to the electric wave state for the channel selected. Then, channel switching determination (step S5) is carried out then to return again to step S1 if it is the timing switched over, select it Its radio communication channel and carry out same communication control.Each of multiple radio communication channels is selected as a result, touringly, it is right At least one party of the measurement of communication or electric wave state is carried out in each radio communication channel.In addition, using touringly selecting At least one radio communication channel in radio communication channel carries out the communication with wireless terminal device.
Each structural portion, structural unit for the wireless terminal device illustrated in following embodiment, mainly as The functional module of processing unit including CPU 21 and realize, but can also pass through and other places other than CPU 21 are set Reason portion (being not limited to any hardware, software) or the dedicated hardware of setting and realize.
Hereinafter, the embodiments of the present invention will be described with reference to the drawings.
(the A: the 1 embodiment)
Fig. 1 is the relay apparatus 1A for indicating the 1st embodiment as relay apparatus according to the present invention Hardware configuration example figure.Relay apparatus 1A is corresponding with the both sides of 2.4GHz frequency band and 5GHz frequency band so-called double The corresponding relay of frequency band (switch hub).Relay apparatus 1A is configured to, and selects 2.4GHz frequency band touringly 1 radio communication channel (hereinafter referred to as CH (A)) and 5GHz frequency band 1 radio communication channel (hereinafter referred to as CH (B)), And it is communicated via the radio communication channel in selection with the wireless terminal device for corresponding to each frequency band.In addition, hereinafter, such as Like that, what is actually used during being communicated with wireless terminal device is wireless by CH (A) and CH (B) in present embodiment Communication channel is referred to as " communication object channel ".
Antenna 101 and the portion RF 103 constitute wireless communication part corresponding with 2.4GHz frequency band, and antenna 102 and the portion RF 104 are constituted Wireless communication part corresponding with 5GHz frequency band.Antenna 101 carries out reception/transmission of the communication electric wave of 2.4GHz frequency band, antenna 102 Carry out reception/transmission of the communication electric wave of 5GHz frequency band.The portion RF 103 carry out by 101 receptions of antenna/transmission communication electric wave with it is interior The transformation of portion's signal, the portion RF 104 are carried out by the transformation of 102 receptions of antenna/transmission communication electric wave and internal signal.
RF selector 105 is indicated according to the selection sent from channel selection control unit 123, selects the portion RF 103 and the portion RF In 104 some and dock and transmit/receive the frequency band (channel) of the number of delivering letters and switch over.RF selector 105 will be from modulation symbol The internal signal that change portion 126 is sent is sent to one for indicating and selecting according to above-mentioned selection in the portion RF 103 and the portion RF 104 Side.In addition, RF selector 105 is by the internal signal exported respectively from the portion RF 103 and the portion RF 104 (that is, indicating via each frequency band Wireless section and the signal of data that receives) in from being indicated according to above-mentioned selection and inside that the side that selects exports Signal is sent to carrier signal test section 130.
Carrier signal test section 130 to the frequency content of the signal (i.e. reception signal) sent from RF selector 105 into Row parsing, and take out the carrier signal of the radio communication channel indicated by channel selection control unit 123.In the carrier signal of taking-up Signal strength be greater than or equal to steady state value in the case where, which is sent to demodulation by carrier signal test section 130 Decodingization portion 106.Demodulating and decoding portion 106 to the carrier signal sent from carrier signal test section 130 demodulated with And decodingization, and take out the frame (being more accurately, mac frame) being superimposed upon in the carrier signal.Also, demodulating and decoding portion The mac frame taken out from carrier signal is sent to frame dispenser 107 by 106.
Frame dispenser 107 is directed to the mac frame (hereinafter referred to as reception mac frame) sent from demodulating and decoding portion 106 Each and differentiate its for control frame with it is any in data frame, control frame is sent to radio control section 108, by data frame It is sent to bridging functionality portion 116.Herein, control frame refers to the relevant frame of the control of the communication between object apparatus, data frame Refer to for the frame that reception/transmission data are transmitted between object apparatus.To then control frame or data frame Differentiation, as long as being carried out referring to the head frame information that is included for receiving mac frame.
Radio control section 108 is the wireless communication control for the communication control for carrying out wireless mac layer (that is, data link layer) Device.As shown in Figure 1, although the relay apparatus 1A of present embodiment is with right respectively with 2.4GHz frequency band and 5GHz frequency band The 2 kinds of wireless communication parts answered, still, the wireless communication controller of the communication control for carrying out wireless mac layer is but only wireless Control unit 108 this 1.The corresponding relay apparatus of existing double frequency-band (for example, it is disclosed in Patent Document 2 it is wireless in After device) in, generally directed to each wireless communication part corresponding with each communication standard, dedicated wireless communication controller is set. Relay apparatus 1A according to the present embodiment, can cut down the quantity of wireless controller, nothing corresponding with existing double frequency-band Line relay is compared, and correspondingly can inhibit lower by manufacturing cost.
Radio control section 108 parses the control frame sent from frame dispenser 107, and extracts and be used for wireless MAC The contextual information of the communication control of layer.The contextual information extracted in this way correspond to each communication object channel and It is stored in the control information holding unit such as RAM.If be described in more detail, the contextual information of CH (A) is controlled by CH (A) Information holding unit 109 saves, and the contextual information of CH (B) is saved by CH (B) control information holding unit 110.In addition, In the communication control of MAC layer, in order to carry out the periodic hair for the beacon being notified to of the BSS to relay apparatus 1A It send, according to the timing controlled of CSMA/CA, needs to generate the unit of various control timings.CSMA/CA is for avoiding Wireless LAN In communication electric wave conflict mechanism, specified in more detail has been carried out to it in IEEE 802.11.About the detailed of the CSMA/CA Feelings can refer to IEEE802.11.In the present embodiment, the unit for generating various control timings is also believed with each communication object Road is correspondingly arranged.CH (A) timing generation unit 111 generates related control timing, CH (B) timing generation unit with CH (A) 112 generate the related control timing with CH (B).
Radio control section 108 generates control frame related with the communication control of beacon frame, MAC layer, and is sent to control frame Queue 120.The generation of control frame is carried out only for the communication object channel selected at the moment.Therefore, frame queue is controlled 120 are not arranged for each communication object channel.It is from wireless terminal in the control frame sent from frame dispenser 107 In the case where the authentication request frames that device is sent, can radio control section 108 receive the wireless end to the certification inquiry of control unit 113 End device.When carrying out the inquiry, radio control section 108 is obtained from selection channel storage unit 125 indicates that having received certification asks The channel information of the communication object channel of frame is sought, and the channel information is sent to certification control unit 113.In addition, certification request Frame is written with for requesting license to relay apparatus 1A using (that is, it is logical to carry out data via relay apparatus 1A Letter) communication message frame.
Can certification control unit 113 be authenticated as follows: accommodate in the radio communication channel for receiving authentication request frames The wireless terminal device of transmission source as the authentication request frames.For example, in the radio communication channel for receiving authentication request frames In the case where not being communication object channel, above-mentioned certification is unsuccessful, in addition, even if being communication object letter in the radio communication channel In the case where road, the case where the wireless terminal device of the transmission source as authentication request frames is not the device pre-registered Under, above-mentioned certification is also unsuccessful.Also, if above-mentioned certification success, authenticating control unit 113 will indicate to authenticate successfully to reply It is sent to radio control section 108, and the information for indicating the wireless terminal device (being in the present embodiment MAC Address) is chased after Add to authentication list.As shown in Figure 1, authentication list is arranged for each communication object channel, 113 basis of control unit is authenticated The channel information sent when being inquired will indicate the terminal identifier for authenticating successful wireless terminal device (for example, the nothing The MAC Address etc. of line terminal installation) be appended to CH (A) authentication list 114 or CH (B) authentication list 115 some.By This, will be licensed using CH (A) and the terminal iidentification of the wireless terminal device via relay apparatus 1A progress data communication Symbol is stored in CH (A) authentication list 114, will be licensed using CH (B) and carries out data communication via relay apparatus 1A The terminal identifier of wireless terminal device is stored in CH (B) authentication list 115.CH (A) authentication list 114 and CH (B) certification List 115 and aftermentioned CH (A) data frame queue 118, CH (B) data frame queue 119 and control frame queue 120 are deposited together It is stored in the storage unit (illustration omitted in Fig. 1) being made of RAM etc..If also, radio control section 108 from certification control unit 113 receive the answer (that is, certification could) for above-mentioned inquiry, then generating control frame corresponding with the answer result, (certification is answered Answer frame), and it is sent to control frame queue 120.
Bridging functionality portion 116 is bridged to the data frame sent from frame dispenser 107 and (transfers and control).With following Situation: the data frame that will for example receive via CH (A) is sent (or carrying out on the contrary) via CH (B).In addition, In the case where relay apparatus 1A has wired LANI/F and also connect with wired lan, bridging functionality portion 116 is also carried out Bridge joint between wired lan and Wireless LAN.
The frame exported from bridging functionality portion 116 is (that is, the data frame sent out to wireless section: hereinafter referred to as transmission data Frame) it is sent to data frame queue selector 117.In the present embodiment, the queue for being put aside to transmission data frame, Each communication object channel is provided with this 2 kinds of CH (A) data frame queue 118 and CH (B) data frame queue 119.Number Each communication object is believed as keyword using the transmission destination-mac address for sending the head of data frame according to frame queue selector 117 The authentication list in road is retrieved, and determines which authentication list be registered in, and the transmission data frame is sent to and is arranged with the certification The data frame queue of the corresponding communication object channel of table.In addition, in the case where sending data frame is broadcast frame, as long as being sent out It send to the transmission data queue of both sides.In addition, in the transmission destination-mac address and any authentication list for sending data frame In the case that MAC Address is all inconsistent, data frame queue selector 117 is discarded without passing to any queue by the transmission data frame It send.
Frame selector 121 is sent from CH (A) data frame queue 118, CH (B) data frame queue 119 and control frame queue 120 take out frame respectively and are sent to modulation symbol portion 126.Herein, it is indicated to take out frame from individual queue by radio control section 108 Timing.In addition, determining which queue to take out frame from based on following main points.Firstly, with CH (A) data frame queue is stored in The frame of 118 and CH (B) data frame queue 119 is compared, and preferentially takes out the frame for being stored in control frame queue 120.That is, only by In the case that the lower control frame queue 120 of the taking-up timing that radio control section 108 indicates is empty, it will just be stored respectively in CH (A) number It is taken out according to the frame of frame queue 118 and CH (B) data frame queue 119.As described above, preferentially take out control frame the reason of be for Obstacle will not be generated in the communication control of MAC layer.
When taking out frame from some in CH (A) data frame queue 118 or CH (B) data frame queue 119, frame is sent Selector 121 is believed according to the information saved in selection channel storage unit 125 from in the moment selected communication object The corresponding data frame queue in road takes out frame.It is selected in the mode including encryptionization from transmission frame in modulation symbol portion 126 It selects the frame that portion 121 is sent to carry out symbolism and make radio frames, and by the radio frames and by channel selection control unit 123 The carrier wave of specified communication object channel is superimposed.Also, modulation symbol portion 126 will internal letter corresponding with the stack result Number it is sent to RF selector 105.
Channel switching timing generation unit 122 in Fig. 1 is, for example, the interval timer etc. for being 10ms (millisecond) in the period, raw At interval it is the periodic timing of 50ms or 100ms, 150ms etc. and will indicates that the timing signal of the timing exports.Channel Timing represented by the timing signal that control unit 123 is selected to export from channel switching timing generation unit 122 is as substantially fixed When and determine the timing switched over to communication object channel, and will selection instruction be sent to RF selector 105.Such as in beacon In the case that period is 150ms, as long as the period (hereinafter referred to as channel switching cycle) that channel switches is set as 50ms etc. i.e. It can.When receiving the timing signal every time, channel selection control unit 123 is such with CH (A) → CH (B) → CH (A) Mode touringly switches over communication object channel.That is, in the relay apparatus 1A of present embodiment, RF selector 105, channel switching timing generation unit 122 and channel selection control unit 123 are realized CH (A) and CH (B) difference touringly It is selected as the effect of the selecting unit of communication object channel.
If be described in more detail, the channel selection control unit 123 of above-mentioned timing signal is received first by the hair of CTS frame Instruction is sent to be sent to CTS (Clear To Send) frame transmission control unit 124.Herein, CTS frame refers in order to avoid in Wireless LAN Hidden terminal problem and be used to transmit the frame of the CTS message of defined in IEEE802.11.CTS message is by the transmission of data Permit 1 in the wireless communication device being sent in BSS, and indicates to forbid to start to communicate with other wireless communication devices logical Believe message.It is provided with address field and Duration field in the CTS message, is set in address field and assigns data transmission The mailing address of the wireless communication device of license is set with expression in Duration field and forbids opening with other wireless communication devices The data of length during beginning to communicate.Concealed terminal is avoided about the details of CTS message and as using CTS message The details of RTS (Request to Send)/CTS of the mechanism of problem, please refer to IEEE802.11.
CTS frame transmission control unit 124 is with generating the MAC for being set with relay apparatus 1A in address field respectively Location and the CTS frame that the time corresponding with channel switching cycle is set in Duration field, and by the CTS frame to control Frame queue 120 transmits.If taken out the CTS frame using frame selector 121 is sent, controlling frame queue 120 will be at the moment It is all discarded to line up the other control frames waited.This is because, then being cut with via this in case of the switching of communication object channel The related control frame of control of the communication of communication object channel before alternatively is invalid earliest.For channel selection control unit 123, such as Fruit from CTS frame transmission control unit 124 be notified of CTS frame be sent this case, then setting constant guard time After, new communication object letter is indicated to RF selector 105, demodulating and decoding portion 106 and modulation symbol portion 126 Road.Herein, for guard time, if the time according to needed for the switching of communication object channel and select value appropriate i.e. Can, such as can be 10ms etc..In this way, if the switching of communication object channel finishes, select channel storage unit 125 to working as The channel number of preceding selected communication object channel is saved.
The above are the structures of relay apparatus 1A.
Then, it is illustrated referring to effect of the Fig. 2 to present embodiment.
Fig. 2 (A) is figure the case where indicating Wireless LAN in the case where having selected CH (A) in relay apparatus 1A, Fig. 2 (B) is figure the case where indicating Wireless LAN in the case where having selected CH (B) in relay apparatus 1A.At Fig. 2 (A) And in each figure of Fig. 2 (B), wireless terminal device a and wireless terminal device c are the device corresponding to 2.4GHz frequency band, and are passed through Reception/transmission of frame is carried out with relay apparatus 1A by CH (A).On the other hand, wireless terminal device b and wireless terminal Device d is the device corresponding to 5GHz frequency band, and carries out reception/transmission of frame with relay apparatus 1A via CH (B).Separately Outside, hereinafter, being directed to CH (A) and CH (B) the two radio communication channels, beacon period is set as 100ms, and channel is cut Changing the period is set as 50ms.
As shown in Fig. 2 (A), in the case where having selected CH (A), wireless terminal device a and wireless terminal device c difference Request certification, if it is authenticated successfully, wireless terminal device a and the respective MAC Address of wireless terminal device c are stepped on respectively Remember CH (A) authentication list 114 in relay apparatus 1A.In this way, if the certification success carried out by relay apparatus 1A, Then wireless terminal device a and wireless terminal device c is able to that frame is sent to relay apparatus 1A via CH (A). For example, the data frame sent from wireless terminal device a towards wireless terminal device c, is bridged using relay apparatus 1A, Via CH (A) data frame queue 118, court is sent to it the wireless terminal device of target (that is, wireless terminal device c) transfers.
If selecting to have passed through channel switching cycle (in this action example after CH (A) as communication object channel In, it is 50ms), then relay apparatus 1A sends CTS frame and forbids wireless terminal device via the communication of CH (A).Such as Fig. 2 (C) shown in, this is added with guard time (10ms) for the time (50ms) until next time selects CH (A) during forbidding and is obtained During arriving (that is, 60ms).During this is forbidden, even to the frame that wireless section is sent, wireless terminal device a and nothing Line terminal installation c also makes the frame line up to wait respectively, retains the transmission of the frame until forbidding period to terminate.
After sending CTS frame, communication object channel is switched to CH (B) by relay apparatus 1A.As shown in Fig. 2 (B), In the case where having selected CH (B), wireless terminal device b and wireless terminal device d request to authenticate respectively, if its certification at Wireless terminal device b and the respective MAC Address of wireless terminal device d are then registered in relay apparatus 1A's by function respectively In CH (B) authentication list 115.In this way, if the certification success carried out by relay apparatus 1A, wireless terminal device b with And wireless terminal device d is able to that frame is sent to relay apparatus 1A using CH (B).For example, being filled from wireless terminal It sets b to be bridged towards the data frame that wireless terminal device d is sent using relay apparatus 1A, via CH (B) data frame Queue 119 and be sent to it target wireless terminal device (that is, wireless terminal device d) transfer.In addition, having selected CH (B) During, for example, by frame from wired lan towards wireless terminal device a or wireless terminal device c (that is, using unselected Communication object channel terminal) send in the case where, these frames be based on CH (A) authentication list 114 and in CH (A) data frame team Line up to wait in column 118 and retains transmission.
If passing through channel switching cycle again after selection CH (B), relay apparatus 1A sends CTS frame and forbids Wireless terminal device switches communication object channel to CH (A) after sending CTS frame via the communication of CH (B).If CH (A) terminate during forbid, then relay apparatus 1A is deposited during having selected CH (B) in CH (A) data frame queue 118 In the case where the frame for lining up to wait, the frame is sent first.It is similarly, for wireless terminal device a and wirelessly whole For end device c, in the case where there is the frame for retaining and sending during the forbidding of communication, successively sent respectively.In addition, Although retaining the frame sent to be possible to just swarm forward after just terminating during forbidding, as long as according to CSMA/CA's Mechanism and transmission control is carried out to these frames.
In this way, relay apparatus 1A according to the present embodiment corresponds to 2.4GHz in a relay apparatus The wireless terminal device of frequency band can be communicated concurrently respectively with the wireless terminal device for corresponding to 5GHz frequency band, so as to Multiple radio communication channels are enough effectively utilized, the convenience of Wireless LAN is improved.
(the B: the 2 embodiment)
Then, the relay apparatus 1B of the 2nd embodiment of the invention is illustrated.Relay apparatus 1B is patrolled Return and seriatim selection belong to 2.4GHz frequency band multiple radio communication channels (in the present embodiment, for CH (A), CH (C) with And CH (D)), and execute the communication with wireless terminal device using the radio communication channel selected or detect this wirelessly At least one party of the electric field strength (that is, wireless survey) of communication channel.If be described in more detail, in the present embodiment, For CH (A), progress only carries out CH (C) and CH (D) via the communication of the channel and the monitoring of electric field strength respectively The monitoring of electric field strength.It is to detect here, carrying out the measurement of electric field strength for the CH (A) as communication object channel Presence of interference in the channel.In addition, can be respectively the wireless communication letter of 5GHz frequency band for CH (C) and CH (D) Road.If CH (C) and CH (D) are respectively the radio communication channel of 5GHz frequency band, electric-field strength is carried out only for 5GHz frequency band The monitoring of degree.
Selecting sequence as the radio communication channel in present embodiment, it may be considered that according to CH (A), CH (C) and The sequence of CH (D) is selected respectively.However, selected only carry out electric field strength monitoring radio communication channel (hereinafter, Referred to as supervision object channel) during, the communication via communication object channel is prohibited, it is therefore preferable that discontinuously selection prison Depending on object channel, forbid period to shorten this as far as possible.For example, in present embodiment, if with CH (A) → CH (C) → CH (A) → CH (D) → CH (A) → such mode carries out channel selection to CH (C) ....In the state of having selected CH (A), firstly, into Then the communication passed through by the radio communication channel monitors the channel.
Fig. 3 is the figure for indicating the structural example of relay apparatus 1B of the 2nd embodiment of the invention.In Fig. 3, for Structural element identical with Fig. 1 marks identical label.It is clear that by being compared to Fig. 3 with Fig. 1, with electric-field strength On this point of spending determination unit 127, electric field strength measurement control unit 128 and measurement result storage unit 129, wireless relay dress The structure for setting 1B is different from the structure of relay apparatus 1A.In addition, in the present embodiment, since CH (C) and CH (D) is equal For the radio communication channel for belonging to 2.4GHz, therefore, as long as CH (A) timing generation unit 111 is used to be directed to CH (C) and CH (D) generation of various control timings.
The transmission instruction of CTS frame is being sent to CTS frame transmission control unit 124 by the channel selection control unit 123 in Fig. 3 When, it is supervision object channel (alternatively, being both supervision object and the channel of communication object) in the channel as switching target In the case of, the channel number of the channel is notified to electric field strength measurement control unit 128, and issues the instruction for starting to be monitored. Be instructed to the electric field strength for starting to be monitored measurement control unit 128 using electric field strength determination unit 127 to electric field strength into Row measurement, and the measurement result is stored in measurement result storage unit 129.The operational management person of relay apparatus 1B passes through Referring to savings in the measurement result of measurement result storage unit 129, so as to grasp, whether there is or not the better channel radios of wave condition Believe channel, or to whether capable of becoming communication object channel in the case where radio communication channel better there are wave condition More the radio communication channel etc. is studied.
The above are the structures of relay apparatus 1B.
As described above, in the relay apparatus 1B of present embodiment, communication object channel is selected touringly With supervision object channel, also, during having selected communication object channel, executed using the communication object channel with wirelessly The communication of terminal installation carries out the survey of electric field strength for the supervision object channel during having selected supervision object channel It is fixed.During having selected supervision object channel, the communication of the wireless terminal device in relay apparatus 1B will be contained in All forbid, but if discontinuously selecting supervision object channel or the selection with communication object channel per unit time Frequency, then can be in the operational process of relay apparatus 1B compared to inhibiting lower the selection frequency of supervision object channel The behaviour in service of supervision object channel is measured, and the convenience of Wireless LAN will not be made to be greatly reduced.
In addition, in the present embodiment, the CH (A) for belonging to 2.4GHz frequency band is set as communication object channel, and will belong to Supervision object channel is set as in the CH (C) and CH (D) of 2.4GHz frequency band.However, it is possible to be identically formed with the 1st embodiment The CH (A) for belonging to 2.4GHz frequency band to be set as communication object channel with the CH (B) for belonging to 5GHz frequency band, for a channel The both sides with the monitoring of the data communication and electric field strength of wireless terminal device are carried out, are only carried out for one other channel and nothing The data communication of line terminal installation.For example, carrying out data communication and electric field strength with wireless terminal device for CH (A) Monitoring both sides and in the case where only being carried out with the data communication of wireless terminal device for CH (B), as long as shown in figure 4, With via the data communication of CH (A) → via CH (B) data communication → CH (A) electric field strength monitoring → via CH (A) Data communication as mode carry out channel switching.Alternatively, it is also possible to both carried out for CH (A) and CH (B) with The both sides of the monitoring of the data communication and electric field strength of wireless terminal device, in this case, as long as with via the number of CH (A) According to the electric field strength of communication → CH (A) monitoring → via CH (B) data communication → CH (B) electric field strength monitoring → warp The mode as the data communication of CH (A) carries out channel switching.Also, it can also will belong to the CH of 2.4GHz frequency band (A) and belong to the CH (B) of 5GHz frequency band and be only used for data communication respectively as communication object channel, 2.4GHz frequency will be belonged to The CH (C) of band only carries out the monitoring of electric field strength as supervision object channel.In this case, as long as shown in figure 5, with warp By CH (A) data communication → via CH (B) data communication → CH (C) electric field strength monitoring → via the number of CH (A) Channel switching is carried out according to such mode is communicated.As long as it is critical that being formed as such as under type touringly, that is, select Each for selecting multiple radio communication channels, via at least one for the radio communication channel selected and wireless terminal device It is communicated, also, each for the radio communication channel selected, is executed via the communication of the channel and the channel Electric wave state measurement at least one party.
Furthermore it is possible to for each frequency band and predefine be for data communication or carry out electric field strength measurement. For example, there are following situations: the channel for belonging to 2.4GHz frequency band (for example, CH (A)) is used to count as communication object channel According to communication, the measurement of electric field strength is only carried out to the channel (for example, CH (B)) for belonging to 5GHz frequency band.According to this mode, example Such as, although using 2.4GHz frequency band in current Wireless LAN, in the case where considering to shift to 5GHz frequency band in the future, energy Enough operate the Wireless LAN and grasp the wave condition of 5GHz frequency band, determine whether transfer, to as diverting the aim When channel used in 5GHz frequency band is selected, reference can be used as.
(the C: the 3 embodiment)
Then, the 3rd embodiment of the invention is carried out.
Fig. 6 is the figure for indicating the structural example of relay apparatus 1C of present embodiment.In Fig. 6, to identical with Fig. 1 Structural element marks identical label.It is clear that by being compared to Fig. 6 with Fig. 1, is being provided with the measurement of channel load rate On this point of portion 131, the structure of relay apparatus 1C are different from the structure of relay apparatus 1A.Select touringly it is multiple Radio communication channel (in the present embodiment, carries out the number with wireless terminal device for one in CH (A) and CH (B)) On this point according to communication, the relay apparatus 1C of Fig. 6 is identical as the relay apparatus 1A of the 1st embodiment.However, wireless Relay 1C is different from relay apparatus 1A at following aspect: (hereinafter referred to as selection phase during having selected each channel Between), the rate of load condensate of the radio communication channel is measured using channel load rate determination part 131, in each of channel switching Channel load rate of the timing based on each radio communication channel and (in other words, be during dynamically changing the selection for the channel Channel switching cycle) length.
If be described in more detail, when every time by indicating that the internal signal for sending frame is sent to RF selector 105, this Modulation symbol portion 126 in the relay apparatus 1C of embodiment notifies the situation to channel load rate determination part 131. Similarly, when the carrier signal that reception signal is parsed and taken out is sent to demodulating and decoding portion 106, carrier wave letter Number test section 130 indicates the case where detected the carrier signal to the notice of channel load rate determination part 131.Channel load rate is surveyed Portion 131 is determined to be measured from modulation symbol portion 126 is notified for opportunity to the time after communication frame is sent out.Separately Outside, channel load rate determination part 131 with from carrier signal test section 130 it is notified for opportunity and to detect receive carrier wave letter Time after number measures.Also, channel load rate determination part 131 will send out the time after communication frame and detect to receive The summation of time after carrier signal during the selection of the channel in shared ratio, as selected wireless at the moment The channel load rate of communication channel and to channel selection control unit 123 notify.Channel selection control unit 123 will be from channel load rate The channel load rate that determination part 131 notifies is written to the buffer circle being arranged for each channel (for example, to nearest 5 The buffer circle that channel load rate during a selection is stored: the illustration omitted in Fig. 6).
The channel selection control unit 123 of relay apparatus 1A switches CH (A) and CH (B) with 50ms with alternating (that is, the length during CH (A) and CH (B) respective selection is fixed, the length is 50ms).Corresponding thereto, relay apparatus Although the channel selection control unit 123 of 1C substantially switches CH (A) and CH (B) with 50ms with alternating, it is based on Channel load rate that each of channel switching is periodically notified from channel load rate determination part 131 and for each channel and It is stored in the channel load rate of buffer circle, and determines during the selection for whether needing to change each channel, determining In the case where needing to change, dynamically to changing during this period.If be described in more detail, the letter of relay apparatus 1C The road selection flow chart according to figure 7 of control unit 123 and determine each channel selection during.
As shown in fig. 7, the channel selection control unit 123 of relay apparatus 1C is obtained first from channel load rate determination part The channel load rates (step SA100) of 131 notices, to during the channel load rate of CH (A) and selection nearest before this (that is, closing During the selection nearest before this of CH (B)) the channel load rate of CH (B) be compared, determine whether the former is greater than or waits In 2 times (step SA110) of the latter.In the case where the judgement result of step SA110 is "Yes", channel selection control unit 123 It further determines in during 5 nearest selections for CH (A), channel load rate is both greater than or is equal to the channel of CH (B) Whether 2 times of state of rate of load condensate is able to continue (step SA120).In the case where the judgement result of step SA120 is "Yes", Channel selection control unit 123 will be set as 1.2 times for during the selection of CH (A), will be set as 0.8 for during the selection of CH (B) Again (step SA130).On the contrary, channel selection control unit 123 makes in the case where the judgement result of step SA120 is "No" Initial value (for example, 50ms) is reverted to during the selection of each channel and terminates the processing.
In contrast, in the case where the judgement result of step SA110 is "No", the channel selection of relay apparatus 1C Control unit 123 determine CH (B) channel load rate whether be channel load rate more than or equal to CH (A) 2 times of (steps SA140).In the case where the judgement result of step SA140 is "Yes", channel selection control unit 123 further directed to CH (B) and In determining 2 times of state that its channel load rate is channel load rate more than or equal to CH (A) during 5 nearest selections Whether all it is able to continue (step SA150), in the case where the judgement result is "Yes", 1.2 will be set as during the selection of CH (B) Times, 0.8 times (step SA160) will be set as during the selection of CH (A).On the contrary, the judgement result in step SA150 is "No" In the case of, initial value (50ms) is reverted to during the selection that channel selection control unit 123 makes each channel and terminates the processing.
That is, in the present embodiment, it is greater than or equal to 2 times in the ratio of the rate of load condensate of interchannel, heavier for load one For the channel of side the state during nearest 5 selections in the case where all continued, the side's that keeps load lighter It cuts down during the selection of channel to 80%, is increased to during the selection for instead making the channel of the heavier side of load 120%, be repeatedly carried out the processing until make the ratio of rate of load condensate less than 2 times until.For example, being 50ms's in channel switching cycle In the case of, if state of rate of load condensate of the rate of load condensate of CH (A) more than or equal to 20% and CH (B) less than 10% is being directed to CH (A) all continued in during nearest 5 selections, then handling up to two channels during executing the selection for changing each channel Until the ratio of rate of load condensate is less than 2 times.That is, by 50ms × 1.2=60ms is set as during the selection of CH (A), by the selection phase of CH (B) Between be set as 50ms × 0.8=40ms.As a result, as shown in figure 8, the communication of CTS becomes CH during forbidding for CH (A) (B) 50ms obtained from 40ms is added with the guard time of 10ms during selection, in the same manner, for CH (B), CTS's Communication becomes 70ms during forbidding.
As described above, relay apparatus 1C according to the present embodiment, in effect identical with the 1st embodiment On the basis of fruit, additionally it is possible to obtain following effect: shortening the lighter radio communication channel of channel load rate (that is, utilization rate is lower Radio communication channel) selection during, on the contrary, lengthen the heavier radio communication channel of channel load rate (that is, utilization rate compared with High radio communication channel) selection during, thus, it is possible to more efficiently use each radio communication channel.
(the D: the 4 embodiment)
Fig. 9 is the figure for indicating the structural example of relay apparatus 1D of the 4th embodiment of the invention.In Fig. 9, to Identical structural element marks identical label in Fig. 3.It is clear that by being compared to Fig. 9 with Fig. 3, with CH (A) Frame error ratio storage unit 132, CH (B) frame error ratio storage unit 133, monitoring result reflection portion 134, monitoring result reflection are fixed When generation unit 135 and on this point of communication speed switch mode storage unit 136, the structure of relay apparatus 1D with The structure of relay apparatus 1B is different.
In relay apparatus 1D, demodulating and decoding portion 106 is when taking out mac frame from reception signal, to mac frame Correctness checked.If be described in more detail, demodulating and decoding portion 106 referring to receiving frame Payload portion and Crc value is calculated, and determines whether the crc value is consistent with the crc value of the crc field on the head for being stored in the receiving frame.Also, In the case that two crc values are inconsistent, which is considered as the frame comprising wrong data and is discarded by demodulating and decoding portion 106. Demodulating and decoding portion 106 calculates for each radio communication channel and detects crc error (that is, above-mentioned crc value is different Cause) frame number and the ratio between received frame number, and exported as the frame error ratio of each radio communication channel.The frame of CH (A) Error rate is stored in CH (A) frame error ratio storage unit 132, and the frame error ratio of CH (B) is stored in CH (B) frame error ratio guarantor Memory cell 133.
Monitoring result reflect timing generation unit 135 generate for will regularly electric field strength monitoring result to messaging parameter The basic timing of (radio communication channel, the switch mode of communication speed, transmission power) reflection is (for example, 1 hour 1 time determines When).In the basic start by set date monitoring result reflection portion 134, reflection of the above-mentioned monitoring result to above-mentioned messaging parameter is realized.Prison The adjustment for further improving communication conditions is carried out according to regularly electric field strength monitoring result depending on result reflection portion 134. Hereinafter, identically as above-mentioned 2nd embodiment, the CH (A) of 2.4GHz frequency band will be belonged to as communication object channel, by CH (C) and CH (D) is as in case where supervision object channel, carries out to the case where improving the communication conditions of 2.4GHz frequency band is attempted Explanation.
Figure 10 is the flow chart for indicating the process of the reflection processing of monitoring result performed by monitoring result reflection portion 134.Such as Shown in Figure 10, monitoring result reflection portion 134 determine first communication object channel (in the present embodiment in CH (A)) whether It detected from the electric wave (step SB100) other than itself BSS.If the judgement result of step SB100 is "No", supervise Monitoring result reflection processing is immediately finished depending on result reflection portion 134.Its reason is if not detected from addition to itself Electric wave (that is, there is no interference) other than BSS is then not necessarily to carry out the improvement of communication conditions.On the contrary, sentencing in step SB100 In the case where determining result for "Yes", monitoring result reflection portion 134 determines whether CH (C) is idle channel (step SB110).If It is described in more detail, then if monitoring result reflection portion 134 is in the monitoring result for CH (C), in past 24 hours Other electric waves are not all detected, then are determined as that the CH (C) is idle channel.
If the judgement result of step SB110 is "Yes", communication object channel is changed to by monitoring result reflection portion 134 CH (C) (step SB120), and monitoring result is made to reflect that processing terminate.When carrying out the change of communication object channel, monitoring result Reflection portion 134 will be all that the authentication list of CH (A) of 2.4GHz frequency band empties, also, issues and believe to channel selection control unit 123 The instruction of road change.In the case where the judgement result of step SB110 is "No", monitoring result reflection portion 134 determines that CH (D) is No is idle channel (step SB130).Also, if the judgement result of step SB130 is "Yes", monitoring result reflection portion 134 Communication object channel is changed to CH (D) (step SB140), and monitoring result is made to reflect that processing terminate.In sentencing for step SB130 In the case where determining result for "No", monitoring result reflection portion 134 executes step SB150 and its later processing.
In the case where the judgement result of step SB130 is "No" (that is, CH (C) and CH (D) non-empty idle channel the case where Under) performed by step SB150 in, monitoring result reflection portion 134 is from 132 getting frame mistake of CH (A) frame error ratio storage unit Rate, and determine whether the frame error ratio is greater than or equal to defined threshold value.Herein, determine whether frame error ratio is greater than or equal to rule The reasons why fixed threshold value, is as follows.It is all IEEE802.11 Wireless LAN in interference source, the electric wave of other side side is reached with enough intensity In the case where, it is acted each other according to CSMA/CA, therefore, although communication speed reduces, frame error ratio is also reduced.It is another Aspect, even in the case where interference source is not IEEE802.11 Wireless LAN or IEEE802.11 Wireless LAN but other side side Electric wave not with enough intensity reach in the case where, the conflict of electric wave can be caused on the communication media and destroy frame, frame Error rate increases.That is, in order to be reached to interference source for the electric wave of IEEE802.11 Wireless LAN and other side side with enough intensity, Or interference source is not IEEE802.11 Wireless LAN (although alternatively, being IEEE802.11 Wireless LAN but the electric wave of the Wireless LAN Not with the arrival of enough intensity) differentiated, the size for carrying out frame error ratio and defined threshold value compares.
In the case where the judgement result of step SB150 is "No", monitoring result reflection portion 134 is generated to indicating interference source The mail that this case is notified is reached with enough intensity for the electric wave of IEEE802.11 Wireless LAN and other side, and is utilized Mailing List member 137 sends the mail (step SB160) to system operator.This is because relying on its own in this case It can not be improved.As long as the system operator for receiving the mail takes reconfiguration etc. to the channel including the system of surrounding Improving Measurements.
On the contrary, monitoring result reflection portion 134 determines currently in the case where the judgement result of step SB150 is "Yes" Whether selected communication speed is minimum communication speed (step SB170), right in the case where the judgement result is "No" Modulation symbol portion 126 issues the instruction (step SB180) that communication speed is switched to lower communication speed.Ordinary circumstance Under, the communication speed (link speed) on communication media correspondingly changes at any time with communication conditions, in the good shape of wave condition Under state, higher communication speed is selected.In the present embodiment, multiple communication speed modes have been prepared in advance, and by these moulds Formula is stored in communication speed switch mode storage unit 136 respectively.It is cut according to communication speed is stored in modulation symbol portion 126 The communication speed mode of mold changing formula storage unit 136 and communication speed when determining modulation.It is in the judgement result of step SB150 In the case where "Yes", communication speed is further decreased, the reason for this is that in general, frame can be made the obstruction by electric wave A possibility that regeneration, improves.
In the case where the judgement result of step SB170 is "Yes" (that is, even if communication speed is reduced to extremely under The case where limit, wave condition is not also enhanced), monitoring result reflection portion 134 determines whether current transmission power reaches thereon Limit value (step SB190) improves in the case where the judgement result is "No" and sends power (step SB200).Its reason exists In, if interference source be IEEE802.11 Wireless LAN, can expect by improve send power be allowed to reply interference source CSMA/CA contention control.In addition, in the case where the judgement result of step SB190 is "Yes", due to that can not expect monitoring knot Fruit reflection portion 134 is improved itself, therefore, is sent to system operator for requesting to improve using Mailing List member 137 Mail (step SB210).
In this way, relay apparatus 1D according to the present embodiment, monitors according to the electric field strength of communication object channel As a result and in the case where having found interference, automatically carry out the switching of communication object channel, adjustment of messaging parameter etc. for into The movement of one step improvement communication conditions.In addition, in the present embodiment, in the case where frame error ratio is more than defined threshold value (in the case that the judgement result of step SB150 is "Yes"), firstly, the judgement (step of communication speed can switch SB170), in the case where that can not switch communication speed (in the case that the judgement result of step SB170 is "Yes"), can progress Improve the judgement (step SB190) for sending power.However, it is also possible in the case where frame error ratio is more than defined threshold value, it is first It first carries out that the judgement for sending power can be improved, carries out that communication speed can be switched in the case where that can not improve and send power Determine (that is, can exchange to step SB170 and step SB190 in Figure 10).
In addition, in the present embodiment, can be handled as follows: have found interference in the case where (step SB100's In the case where determining result for "Yes"), firstly, the processing for being attempted to change to idle channel is (from step SB110 to step The processing of SB140), but can also will be omitted from step SB110 to the processing of step SB140, in the case where having found interference, It is immediately performed the processing of step SB150.Alternatively, it is also possible to will not be omitted from step SB110 to the processing of step SB140, but It will attempt to reduce the processing (processing of step SB170 and SB180) of communication speed and attempt to improve the processing (step for sending power The processing of rapid SB190 and SB200) in either or both sides omit.In addition, at the place that will attempt reduction communication speed In the case that the both sides of reason and the processing for attempting to improve transmission power omit, additionally it is possible to by the processing of step SB150 and SB160 It omits.In this case, in the case where idle channel is not present, it is immediately performed the processing (step that mail is sent to manager SB210)。
(E: deformation)
Although the embodiments of the present invention are illustrated above, under can of course implementing to these embodiments The deformation stated.
(1) in the respective embodiments described above, to the both sides applied the present invention to 2.4GHz frequency band and 5GHz frequency band The example of relay apparatus corresponding to corresponding double frequency-band is illustrated, but can of course apply the present invention to as follows Relay apparatus: each of multiple radio communication channels in certain 1 frequency band are selected touringly, for the nothing selected Line communication channel executes the measurement of electric wave state respectively and fills with the wireless terminal for the electric wave for having used the radio communication channel At least one party for the communication set.Furthermore it is possible to apply the present invention to wireless relay corresponding with the frequency band more than or equal to 3 Device.This is because although the frequency band of the communication electric wave of Wireless LAN is there is currently this 2 kinds of 2.4GHz frequency band and 5GHz frequency band, It is to be possible in the future also using other frequency bands.In addition, in the respective embodiments described above, to applying the present invention to contain nothing The example of line terminal installation and the relay apparatus to work as switch hub is illustrated.However, it is possible to Apply the present invention to the relay apparatus for accommodating wireless terminal device and working as router, in this case, As long as replacing MAC Address and using IP address as the terminal identifier identified to wireless terminal device.
(2) in the respective embodiments described above, to the transmission CTS message when carrying out channel switching, and the nothing before switching is used Line communication channel and the wireless terminal device communicated be emitted in it is constant during (that is, until selecting the channel radio next time During believing until channel) incommunicado instruction, but it is also possible to define the new message for playing phase same-action with CTS message (for example, message of application layer), makes relay apparatus 1A, 1B, 1C and 1D execute the broadcast of the new message respectively and replace CTS The transmission of message.In addition, having played following effect: by carry out it is as described above communication forbid, thus it is non-selected for During the radio communication channel that wireless terminal device is communicated, the wireless terminal device is avoided to carry out useless data hair Send, still, it is no lead to the problem of useless data and send in the case where, can also forbid without communication as described above (that is, transmission of CTS message).
(3) following situation is illustrated in the respective embodiments described above: is selecting other radio communication channels Period send using the radio communication channel and using wireless terminal device as the frame of destination in the case where, by the frame savings in Queue is sent at the time of having selected the radio communication channel again to the wireless terminal device.However, if each wireless Communication performed by terminal installation is the communication for being not necessarily to save state as browsing Web page, then without carrying out Line up to wait as stating.
(4) in the respective embodiments described above, selecting unit is made of hardware respectively with communication control unit, wherein selection Unit selects each (RF selector 105, channel switching timing in each embodiment of multiple radio communication channels touringly Generation unit 122 and channel selection control unit 123), communication control unit is via wireless by what is gone out selected by selecting unit At least one of communication channel and communicated with wireless terminal device, and for the wireless communication selected by selecting unit Channel each and execute at least one party of the measurement of electric wave state via the communication of the channel and the channel (the 1st And the 3rd be to send frame selector 121 and CTS frame transmission control unit 124 (in addition, if for without CTS frame in embodiment Transmission mode, then be not necessarily to CTS frame transmission control unit 124), further include electric field strength measurement in the 2nd and the 4th embodiment Unit 127, electric field strength measurement control unit 128 and measurement result storage unit 129), these hardware combinations are realized The relay apparatus of the respective embodiments described above.It is however also possible to provide executing following communication control method in a computer Program simultaneously acts the control unit of relay apparatus according to the program, which includes: to select touringly The step of selecting each of multiple radio communication channels；And via the radio communication channel selected at least one and with nothing Line terminal installation is communicated, and is directed to each for the radio communication channel selected and is executed the communication via the channel And the measurement of the electric wave state of the channel at least one party the step of.In addition, as the presentation mode of this program, energy is provided Enough expect in a manner of being written and be issued to CD-ROM etc. computer-readable recording medium, by via internet etc. Electrical communication line be downloaded and the mode issued.
The explanation of label:
1A, 1B, 1C, 1D ... relay apparatus
101,102 ... antennas
103 ... the portions 2.4G frequency band RF
104 ... the portions 5GHz frequency band RF
105 ... RF selectors
106 ... demodulating and decoding portions
107 ... frame dispensers
108 ... radio control sections
109 ... CH (A) control information holding unit
110 ... CH (B) control information holding unit
111 ... CH (A) timing generation unit
112 ... CH (B) timing generation unit
113 ... authentication departments
114 ... CH (A) authentication list
115 ... CH (B) authentication list
116 ... bridging functionality portions
117 ... data frame queue selectors
118 ... CH (A) data frame queue
119 ... CH (B) data frame queue
120 ... control frame queues
121 ... send frame selector
122 ... channel switching timing generation units
123 ... channel selection control units
124 ... CTS frame transmission control units
125 ... selection channel storage units
126 ... modulation symbol portions
127 ... electric field strength determination units
128 ... electric field strengths measure control unit
129 ... measurement result storage units
130 ... carrier signal test sections
131 ... channel load rate determination parts
132 ... CH (A) frame error ratio storage unit
133 ... CH (B) frame error ratio storage unit
134 ... monitoring result reflection portions
135 ... monitoring results reflect timing generation unit
136 ... communication speed switch mode storage units
137 ... Mailing Lists member

Claims (14)

1. a kind of relay apparatus is the relay apparatus of the Wireless LAN of IEEE802.11 standard, which is characterized in that It includes
Selecting unit selects multiple radio communication channels each touringly；And
Communication control unit, via at least one and wireless terminal of the radio communication channel selected by the selecting unit Device is communicated, and each for the radio communication channel selected by the selecting unit, is executed via the letter At least one party in the measurement of the electric wave state of the communication in road and the channel,
The selecting unit among the multiple radio communication channel discontinuously to select the measurement for only carrying out electric wave state The mode of radio communication channel each of the multiple radio communication channel is selected.
2. a kind of relay apparatus is the relay apparatus of the Wireless LAN of IEEE802.11 standard, which is characterized in that It includes
Selecting unit selects multiple radio communication channels each touringly；And
Communication control unit, via at least one and wireless terminal of the radio communication channel selected by the selecting unit Device is communicated, and each for the radio communication channel selected by the selecting unit, is executed via the letter At least one party in the measurement of the electric wave state of the communication in road and the channel,
The selecting unit by the multiple radio communication channel only carry out electric wave state measurement radio communication channel The selection time per unit time inhibit low.
3. relay apparatus according to claim 1 or 2, which is characterized in that
In the multiple radio communication channel, with only carry out electric wave state measurement radio communication channel compared with, for The radio communication channel of the communication of the wireless terminal device includes more.
4. relay apparatus according to any one of claim 1 to 3, which is characterized in that
The communication control unit in the multiple radio communication channels of a certain frequency band for belonging to multiple frequency bands different from each other, into The communication of row and the wireless terminal device for corresponding to each frequency band.
5. relay apparatus according to any one of claim 1 to 4, which is characterized in that
Each of the multiple radio communication channel is belonging respectively to a certain frequency band of multiple frequency bands different from each other, the communication Control unit is only somebody's turn to do for the radio communication channel for belonging to predetermined frequency band in the multiple radio communication channel The measurement of the electric wave state of radio communication channel.
6. relay apparatus according to any one of claim 1 to 5, which is characterized in that
Also have monitoring result reflect unit, in the multiple radio communication channel be used for and wireless terminal device Communication radio communication channel in presence of interference determined, in the case where being determined to have interference, to for it is described It the radio communication channel of the communication of wireless terminal device, communication speed and sends some of power and changes.
7. relay apparatus according to any one of claim 1 to 6, which is characterized in that
The communication control unit is directed to the radio communication channel before utilizing switching before switching radio communication channel The wireless terminal device that electric wave is communicated is emitted in until the radio communication channel is forbidden be selected as only next time during The instruction that new communication starts.
8. a kind of radio relay method is the wireless relay side of the relay apparatus of the Wireless LAN of IEEE802.11 standard Method, which is characterized in that
Each of multiple radio communication channels is selected touringly,
It is communicated with wireless terminal device via the radio communication channel selected at least one touringly, and needle To each of the radio communication channel selected touringly, the electric wave shape via the communication of the channel and the channel is executed At least one party in the measurement of state,
Discontinuously to select only to carry out the wireless communication letter of the measurement of electric wave state among the multiple radio communication channel The mode in road selects each of the multiple radio communication channel.
9. a kind of radio relay method is the wireless relay side of the relay apparatus of the Wireless LAN of IEEE802.11 standard Method, which is characterized in that
Each of multiple radio communication channels is selected touringly,
It is communicated with wireless terminal device via the radio communication channel selected at least one touringly, and needle To each of the radio communication channel selected touringly, the electric wave shape via the communication of the channel and the channel is executed At least one party in the measurement of state,
Per unit time by the radio communication channel of the measurement for only carrying out electric wave state in the multiple radio communication channel The selection time inhibit low.
10. radio relay method according to claim 8 or claim 9, which is characterized in that
In the multiple radio communication channel, with only carry out electric wave state measurement radio communication channel compared with, for The radio communication channel of the communication of the wireless terminal device includes more.
11. the radio relay method according to any one of claim 8 to 10, which is characterized in that
In the multiple radio communication channels of a certain frequency band for belonging to multiple frequency bands different from each other, carries out and correspond to each frequency band Wireless terminal device communication.
12. the radio relay method according to any one of claim 8 to 11, which is characterized in that
Each of the multiple radio communication channel is belonging respectively to a certain frequency band of multiple frequency bands different from each other, for described The radio communication channel for belonging to predetermined frequency band in multiple radio communication channels, only carries out the electricity of the radio communication channel The measurement of wavy state.
13. the radio relay method according to any one of claim 8 to 12, which is characterized in that
It is being used to have with the radio communication channel of the communication of wireless terminal device in the multiple radio communication channel No interference is determined, in the case where being determined to have interference, to for the wireless of the communication with the wireless terminal device Some of communication channel, communication speed and transmission power change.
14. the radio relay method according to any one of claim 8 to 13, which is characterized in that
For the nothing communicated using the electric wave of the radio communication channel before switching before switching radio communication channel Line terminal installation is emitted in until the radio communication channel forbids new communication to start finger be selected as only next time during Show.
CN201811468892.2A 2012-03-08 2013-02-28 Wireless relay device and wireless relay method Active CN109495154B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2012-051632 2012-03-08
JP2012051632A JP5966455B2 (en) 2012-03-08 2012-03-08 Wireless relay device
CN201380010041.2A CN104145499B (en) 2012-03-08 2013-02-28 Relay apparatus, radio relay method, control method, control program and recording medium

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CN201380010041.2A Division CN104145499B (en) 2012-03-08 2013-02-28 Relay apparatus, radio relay method, control method, control program and recording medium

Publications (2)

Publication Number Publication Date
CN109495154A true CN109495154A (en) 2019-03-19
CN109495154B CN109495154B (en) 2021-08-24

Family

ID=49116608

Family Applications (2)

Application Number Title Priority Date Filing Date
CN201380010041.2A Active CN104145499B (en) 2012-03-08 2013-02-28 Relay apparatus, radio relay method, control method, control program and recording medium
CN201811468892.2A Active CN109495154B (en) 2012-03-08 2013-02-28 Wireless relay device and wireless relay method

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CN201380010041.2A Active CN104145499B (en) 2012-03-08 2013-02-28 Relay apparatus, radio relay method, control method, control program and recording medium

Country Status (3)

Country Link
JP (1) JP5966455B2 (en)
CN (2) CN104145499B (en)
WO (1) WO2013133126A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021240746A1 (en) * 2020-05-28 2021-12-02 日本電信電話株式会社 Wireless communication device and wireless communication method

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1280431A (en) * 1999-07-07 2001-01-17 索尼公司 Radio network controller and radio network control method
CN1462523A (en) * 2001-05-11 2003-12-17 皇家菲利浦电子有限公司 Dynamic frequency selection scheme for IEEE 802.11. WLANS
US20040264425A1 (en) * 2003-05-16 2004-12-30 Sony Corporation Communication system, communication method, communication apparatus, communication control method, and computer program
CN1647423A (en) * 2002-04-23 2005-07-27 索尼株式会社 Radio communication method and radio communication device
CN1707986A (en) * 2004-06-11 2005-12-14 株式会社Ntt都科摩 A radio frequency selection device, a radio communication system and radio control channel establishing method
JP2007043447A (en) * 2005-08-03 2007-02-15 Matsushita Electric Ind Co Ltd Wireless lan terminal, wireless lan access point, wireless lan system, and method for maintaining wireless lan
CN101060389A (en) * 2006-04-20 2007-10-24 大唐移动通信设备有限公司 A TD-CDMA system performance optimization method
CN101356834A (en) * 2005-09-01 2009-01-28 赛普拉斯半导体公司 Method for channel agility in wireless access points
CN101473684A (en) * 2006-06-20 2009-07-01 诺基亚公司 Method and system for providing interim discontinuous reception/transmission
CN101626605A (en) * 2008-07-10 2010-01-13 华为技术有限公司 Method, system and device for switching wireless system
CN101902768A (en) * 2009-05-29 2010-12-01 巴比禄股份有限公司 Radio communication device, wireless communication system and wireless communications method
CN101925938A (en) * 2008-11-26 2010-12-22 株式会社村田制作所 System and method for adaptive power conservation based on traffic profiles
CN101931475A (en) * 2009-06-17 2010-12-29 卡西欧计算机株式会社 Detect radio communication device, wireless communications method and the program recorded medium of the electric field strength of wireless channel
CN101998478A (en) * 2009-08-25 2011-03-30 马维尔国际贸易有限公司 Grouping of users onto traffic channels in multiple-users-per-channel transmission schemes
CN102264155A (en) * 2010-05-26 2011-11-30 英特尔公司 Device, system and method of wireless communication over non-contiguous channels

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000022712A (en) * 1998-07-06 2000-01-21 Nec Corp Channel selection method
CA2625094A1 (en) * 2005-11-02 2007-05-10 Telefonaktiebolaget L M Ericsson (Publ) Wireless telecommunications systems
JP4318050B2 (en) * 2006-01-24 2009-08-19 ソニー株式会社 Wireless channel determination and selection method and access point device
JPWO2007125702A1 (en) * 2006-04-27 2009-09-10 三菱電機株式会社 Channel quality reporting method, scheduling method, communication system, terminal, and base station
WO2009057481A1 (en) * 2007-10-30 2009-05-07 Ntt Docomo, Inc. User device and signal electric power measurement method
CN102474871B (en) * 2010-06-03 2016-06-29 松下知识产权经营株式会社 Communication terminal
US8509833B2 (en) * 2010-06-24 2013-08-13 Qualcomm Incorporated Method and apparatus for using and/or implementing control channels in white space

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1280431A (en) * 1999-07-07 2001-01-17 索尼公司 Radio network controller and radio network control method
CN1462523A (en) * 2001-05-11 2003-12-17 皇家菲利浦电子有限公司 Dynamic frequency selection scheme for IEEE 802.11. WLANS
JP2004520766A (en) * 2001-05-11 2004-07-08 コーニンクレッカ　フィリップス　エレクトロニクス　エヌ　ヴィ Dynamic frequency selection scheme for IEEE 802.11 compliant WLANs
CN1647423A (en) * 2002-04-23 2005-07-27 索尼株式会社 Radio communication method and radio communication device
US20040264425A1 (en) * 2003-05-16 2004-12-30 Sony Corporation Communication system, communication method, communication apparatus, communication control method, and computer program
CN1707986A (en) * 2004-06-11 2005-12-14 株式会社Ntt都科摩 A radio frequency selection device, a radio communication system and radio control channel establishing method
JP2007043447A (en) * 2005-08-03 2007-02-15 Matsushita Electric Ind Co Ltd Wireless lan terminal, wireless lan access point, wireless lan system, and method for maintaining wireless lan
CN101356834A (en) * 2005-09-01 2009-01-28 赛普拉斯半导体公司 Method for channel agility in wireless access points
CN101060389A (en) * 2006-04-20 2007-10-24 大唐移动通信设备有限公司 A TD-CDMA system performance optimization method
CN101473684A (en) * 2006-06-20 2009-07-01 诺基亚公司 Method and system for providing interim discontinuous reception/transmission
CN101626605A (en) * 2008-07-10 2010-01-13 华为技术有限公司 Method, system and device for switching wireless system
CN101925938A (en) * 2008-11-26 2010-12-22 株式会社村田制作所 System and method for adaptive power conservation based on traffic profiles
CN101902768A (en) * 2009-05-29 2010-12-01 巴比禄股份有限公司 Radio communication device, wireless communication system and wireless communications method
CN101931475A (en) * 2009-06-17 2010-12-29 卡西欧计算机株式会社 Detect radio communication device, wireless communications method and the program recorded medium of the electric field strength of wireless channel
CN101998478A (en) * 2009-08-25 2011-03-30 马维尔国际贸易有限公司 Grouping of users onto traffic channels in multiple-users-per-channel transmission schemes
CN102264155A (en) * 2010-05-26 2011-11-30 英特尔公司 Device, system and method of wireless communication over non-contiguous channels

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
NORTEL: "Further Discussion on the Differential Feedback of PMI for LTE Downlink Closed-Loop MIMO", 《TSGR1_50：R1-073292》 *
侯远政: "移动通信协议中无线资源管理的研究与实现", 《中国优秀硕士学位论文全文库》 *

Also Published As

Publication number Publication date
CN109495154B (en) 2021-08-24
WO2013133126A1 (en) 2013-09-12
CN104145499A (en) 2014-11-12
JP2013187748A (en) 2013-09-19
CN104145499B (en) 2018-12-25
JP5966455B2 (en) 2016-08-10

Similar Documents

Publication Publication Date Title
CN105636233B (en) The LBT methods of uplink downlink are considered in a kind of LAA systems simultaneously
US8085785B2 (en) Mobile station, a base station, a mobile communication system and a communication control method
JP5139788B2 (en) Wireless device, wireless communication system, control method, and control program
JP4598006B2 (en) Method and apparatus for performing idle handoff in a multiple access communication system
JP4113160B2 (en) Wireless communication system and wireless communication method
CN102957455B (en) Wireless communication apparatus and interference avoidance method
US8351457B2 (en) Method and system for providing a priority-based, low-collision distributed coordination function using a super-frame structure
TWI498023B (en) Communications apparatus and method for reducing power consumption of a communications apparatus in wlan system
CN105830506B (en) The power in the Wireless LAN system for the channel of downlink is being supported to reduce mode operation method and its device
EP2632209A2 (en) Method, apparatus, and computer program product for coexistence-aware communication mechanism for multi-radios
JP6498769B2 (en) Wireless environment information collection system and method
EP3160189B1 (en) Methods, access points and stations for basic service set association
CN103155638A (en) Method and apparatus for enabling scheduled transmission
WO2014087042A1 (en) Packet measurements and reporting in wireless network
Sathya et al. Association fairness in Wi-Fi and LTE-U coexistence
JP2007201622A (en) Wireless channel determination/selection method and access point device
US7197315B1 (en) Method and apparatus to select a channel using performance metrics
US8457009B2 (en) Wireless communication apparatus and wireless communication method for detecting electric field intensity of wireless channel, and program storing medium
JP5493087B2 (en) Base station apparatus, radio communication system, and radio communication method
CN104145499B (en) Relay apparatus, radio relay method, control method, control program and recording medium
EP3915310B1 (en) Cooperative inter-network channel selection
KR20100007691A (en) Apparatus and method for transceiving data using relay device in wireless communication system of centralized mac
Hosseinabadi et al. Concurrent-MAC: Increasing concurrent transmissions in dense wireless LANs
CN101019443A (en) Seamless channel change in a wireless local area network
JP2016187215A (en) Wireless repeater and program

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant