CN101631337B - Method and device of data transmission - Google Patents
Method and device of data transmission Download PDFInfo
- Publication number
- CN101631337B CN101631337B CN2009101656163A CN200910165616A CN101631337B CN 101631337 B CN101631337 B CN 101631337B CN 2009101656163 A CN2009101656163 A CN 2009101656163A CN 200910165616 A CN200910165616 A CN 200910165616A CN 101631337 B CN101631337 B CN 101631337B
- Authority
- CN
- China
- Prior art keywords
- address information
- address list
- current message
- address
- list
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a method and a device of data transmission, which are used for solving the problem that the wireless network bandwidth resource is avoided because of a hidden working station during the data transmission of the prior art. The method comprises the following steps: a current working station receives at least one message, updates a stored first address list including source address information according to source address information of the current message when the received current message is not sent by a center working station, updates a stored second address list including target address information according to target address information of the current message when the received current message is sent by the center working station and the target address information of the current message is not local address information, compares the source address information included in the first address list with the target address information included in the second address list, and determines whether to transmit data by adopting a handshake protocol according to the compared result.
Description
Technical field
The present invention relates to the cordless communication network technical field, particularly a kind of method of transfer of data and device.
Background technology
The media access control layer of WLAN standard IEEE802.11 (Media Access Control, MAC) and the MAC of 802.3 agreements closely similar, all be on a shared medium, to support a plurality of network equipment shared resources, before sending data, carry out the availability inspection of network by the network equipment earlier.
In 802.3 agreements, be by a kind of csma (CarrierSense Multiple Access with Collision Detection that has collision detection that is called, CSMA/CD) agreement is finished adjusting, this agreement has solved each network equipment on Ethernet how in the problem of the enterprising line data transmission of cable, utilizes its to detect and avoid the conflict on the network when two or more network equipments need carry out transfer of data.
In the IEEE802.11 protocol of wireless local area network, the network equipment, work station (Station just, STA) can not be while receiving the data-signal data signal, thereby, there is certain problem in the detection of conflict, therefore, in 802.11, CSMA/CD some adjustment have been carried out, adopted new agreement, having comprised: the Carrier Sense Multiple Access that having conflicts avoids (Carrier Sense Multiple Access withCollision Avoidance, CSMA/CA), or distribution of wireless competition communication mechanism (DistributedCoordination Function, DCF).Wherein, the message dropping that CSMA/CA utilizes ack signal to avoid conflict to bring that is to say, has only and confirms just that after the source work station receives the ack signal that returns on the network data of sending have correctly arrived the target work station.The concrete workflow of utilizing the CSMA/CA agreement to send data comprises:
Step 1: work station is monitored media state before sending data, and waiting does not have other work stations to use medium, keep a period of time after, still do not have other work stations to use after waiting for one period at random again, just carry out step 2.Because the random time difference that each work station adopts is so can reduce the chance of conflict.
Step 2: work station send one section slight request to transmit that (Request to Send, RTS) message is given the target work station, waits for that permission that the target work station is responded sends that (Clear to Send CTS) behind the message, just begins to transmit data earlier.Utilize request transmission/permission to send (RTS/CTS) Handshake Protocol, when guaranteeing to transmit data, can not collided.
Step 3: wait for the ACK that the target work station returns, do not receive or during wait timeout, repeat 1,2 step that number of repetition can manually be set, and successfully sends or is dropped up to data.
This explicit ACK mechanism in the CSMA/CA agreement is in handling WLAN (wireless local area network), and is very effective during the problem of the conflict when two or more work stations need carry out transfer of data on the network.Wherein, RTS/CTS mechanism is equivalent to a kind of Handshake Protocol, is mainly used to solve " hiding work station " (Hidden stations) problem in the above-mentioned collision problem." hide work station " is meant, when workstation1 sent messages to work station 2, work station 3 and workstation1 be not each other in the other side's signal cover, but all at work station 2, just in the signal cover of central station; Therefore, in the snoop procedure of above-mentioned steps one, work station 3 can not detect workstation1 and send data, at this moment, work station 3 checks that the state of medium is idle, also sends message to work station 2, so workstation1 and work station 3 are sent to message work station 2 simultaneously, cause message collisions, the message that finally causes being sent to work station 2 has all been lost.As seen, for work station 3, workstation1 is exactly " hiding work station ", and to workstation1, work station 3 also is " hiding work station "." hiding work station " mostly occurs in the network configuration mutability, move, or some wireless network signal coverage is planned improperly in the network, its harmfulness shows particularly evident in " large data communication process " and " network of busy state ", this can bring the efficient heavy losses of transfer of data, can not obtain under the situation of fine solution if " hide the work station problem ", even can cause comprehensive paralysis of network.What therefore, stop " hiding work station " phenomenon is the essential condition that guarantees the network normal service.
The problem of above-mentioned for solving " hiding work station " is used RTS/CTS mechanism in the CSMA/CA agreement of IEEE802.11, referring to Fig. 1, comprising:
At first, workstation1 sends the RTS signal to work station 2, show that workstation1 will send plurality of data to work station 2, after work station 2 is received RTS, 802.11 wireless stations to all same channels are sent cts signal, show readyly, and workstation1 is according to receiving cts signal, define authority and carry out the transmission of data, other are desired when 802.11 wireless stations that work station 2 sends the same channel of data receive this CTS then wouldn't competitive channel; Both sides are successfully exchanging the RTS/CTS signal, promptly finish shake hands after, just begin real data passes, guaranteed that a plurality of mutual sightless transmission work stations can not send data to same receiving workstation simultaneously, receiving workstation can normally finish receiving the data that corresponding work station that RTS/CTS shakes hands sends, thereby has avoided conflict to take place.
In above-mentioned IEEE802.11 agreement, use RTS/CTS mechanism to solve and avoided the problem of " hiding work station ", but, adopt RTS/CTS mechanism can take the bandwidth resources of wireless network in the data transmission procedure, especially under the situation that does not have " hiding work station " problem, the wireless network resource expense that adopts RTS/CTS mechanism to bring just there is no need more.
Summary of the invention
The embodiment of the invention provides a kind of method and device of transfer of data, in order to solve in the prior art data transmission procedure, takies the wireless network bandwidth problem of resource because of having avoided " hiding work station ".
The embodiment of the invention provides a kind of method of transfer of data, comprising:
Receive at least one message, when the current message that receives is not that the central station is when sending, source address information according to described current message, upgrade first address list of preserving that comprises source address information, when the current message that receives is that the central station sends, and when the target address information of described current message is not local address information,, upgrade second address list of preserving that comprises target address information according to the target address information of described current message;
The target address information that the source address information that described first address list is comprised and second address list comprise compares, and according to comparative result, determines whether to adopt Handshake Protocol to send data.
The embodiment of the invention provides a kind of work station of transfer of data, comprises
Receiving element is used to receive at least one message;
Updating block, be used for when the current message that receives be not that the central station is when sending, source address information according to described current message, upgrade first address list of preserving that comprises source address information, when the current message that receives is that the central station sends, and when the target address information of described current message is not local address information,, upgrade second address list of preserving that comprises target address information according to the target address information of described current message;
Comparing unit is used for the target address information that the source address information that described first address list is comprised and second address list comprise and compares, and according to comparative result, determines whether to adopt Handshake Protocol to send data.
In the data transmission method that the embodiment of the invention provides, the address information that at first carry according to every the message that receives at the work at present station, upgrade first address list of preserving that comprises source address information, or, second address list of preserving that comprises target address information, the address information that comprises of the address information that described first address list is comprised and second address list compares then, according to comparative result, determine whether to adopt Handshake Protocol to send data, when thereby the target address information that the source address information that comprises when described first address list and second address list comprise is identical, determine not exist " hiding work station ", therefore do not adopt Handshake Protocol to send data, avoid using the waste of the wireless network resource that Handshake Protocol causes like this, increased the throughput of wireless network.
Description of drawings
Fig. 1 is the schematic diagram that available technology adopting RTS/CTS mechanism sends data;
Fig. 2 is the method flow diagram that data send in the embodiment of the invention;
Fig. 3 is a communication system topological diagram in the embodiment of the invention;
Fig. 4 is each flow chart of data processing figure that receives in the embodiment of the invention;
Fig. 5 is the structure chart of work station in the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of method of transfer of data, optimizes the hiding work station way to solve the problem of existing IEEE802.11 protocol definition, reduces the bandwidth cost that RTS/CTS mechanism is brought, and solves the work station problem of hiding with less cost.
The embodiment of the invention is applied to basic Basic Service Set (Infrastructure Basic Service Set, Infrastructure BSS) in the network configuration, the basic structure of Infrastructure BSS is starlike, a central station is arranged, with a plurality of attachment stations, in most cases, the communication between the attachment station all is to transmit by the central station.Under the small part situation, use DLS action frame to set up direct-link between the attachment station and connect direct communication.
Infrastructure BSS is a kind of of Basic Service Set BSS, a BSS can be by basic service set identification (Basic Service Set Identifier, BSSID), and service set (Service Set Identifier, SSID) two attributes are unique definite; The Infrastructure BSS of a plurality of identical SSID can form an extended service set, and (Extended Service Set ESS), also is a wireless network.
In Infrastructure BSS wireless network, the central task standing-meeting uses specific beacon frame Broadcast SSIDs and BSSID to give all interior attachment stations of its signal cover, attachment station uses and to receive to such an extent that the information in the beacon frame connects central station, thereby communicates by central station's joint.
In the embodiment of the invention, work station is arbitrary network equipment in the cordless communication network, comprising: and base station, WAP (wireless access point) (Access Point, AP) or terminal equipment.Work station can the receiving target address be the message of local address not only, can the receiving target address not be the message of local address also.Just message can be shared all working station reception of same medium.
Work at present stands in when carrying out network service, at first acquiescence is enabled RTS/CRS mechanism, detects for the work at present station whether have the problem of hiding work station in the course of the work, if do not exist, then close RTS/CTS mechanism, in communication process subsequently, directly send data to the central station; If have the problem of hiding work station for the work at present station, then adopt RTS/CTS mechanism to send data to the central station.Duplicate detection process then is when the result who detects changes, also according to above-mentioned condition changing operating state.
Referring to Fig. 2, in Infrastructure BSS wireless network, the process of work at present station and central station's transfer of data comprises:
Step 201: the work at present station receives message.
The work at present station can the receiving target address be the message of local address not only, can the receiving target address not be the message of local address also, therefore, works as shared medium, and when on the just same channel message being arranged, the work at present station can receive.The work at present station receives one or more message.
Step 202: the address information that carry according to every the message that receives at the work at present station, upgrade first address list of preserving that comprises source address information, or, second address list that comprises target address information of preservation.
The work at present station receives one or more message, like this, when the current message that receives is not that the central station sends, can upgrade first address list of preserving that comprises source address information according to the source address information of current message; When the current message that receives is that the central station sends, and the target address information of described current message then can upgrade second address list of preserving that comprises target address information according to the target address information of current message when not being local address information.
Therefore, according to one or more message of receiving, may have only first address list or second address list to be updated, also may be that the both has been updated, and also might the both not be updated.
Here, when the target address information of the current message that receives is a local address information, the current message of work at present station normal process then; When the target address information of the current message that receives is not a local address information, then the work at present station abandons current message.
Step 203: the target address information that the source address information that the work at present station comprises first address list and second address list comprise compares, when the address information that comprises when both is identical, and execution in step 204, otherwise, execution in step 205.
Before comparing, can adopt ordering, modes such as hashed are handled first address list and second address list.Then, the target address information that the source address information that the work at present station can regularly comprise first address list and second address list comprise compares, when the target address information that the source address information that comprises when first address list and second address list comprise is identical, execution in step 204, otherwise, execution in step 205.
Here, can also have only the source address information that comprises in first address list, or the target address information that comprises in second address list has been updated, perhaps both's situation about being updated just compares first address list and second address list.
Step 204: close RTS/CTS mechanism, directly send data to the central station.
When the target address information that the source address information that first address list comprises and second address list comprise is identical, all communication parters of central station just can be known in the work at present station, promptly for the work at present station, under present communication construction, there be not " hiding work station ", therefore, when listening to after medium are in idle condition, directly send message to the central station.
Step 205: open RTS/CTS mechanism, adopt RTS/CTS mechanism to send data.
The target address information that the source address information that first address list comprises and second address list comprise is inequality, for the work at present station, under present communication construction, may there be " hiding work station ", therefore, must open RTS/CTS mechanism, adopt RTS/CTS mechanism to send data.Just, the work at present station listens to after medium are in idle condition, sends the RTS message to the central station, after receiving the CTS message that returns the central station, sends data to the central station again.
In embodiments of the present invention, this Handshake Protocol of employing RTS/CTS mechanism solves " hiding work station " problem in the InfrastructureBSS wireless network.Certainly, can also adopt the Handshake Protocol of other similar RTS/CTS mechanism to solve " hiding work station " problem in the Infrastructure BSS wireless network.Therefore, the comparative result of the target address information that the source address information that the work at present station can also comprise according to first address list and second address list comprise determines whether to adopt the Handshake Protocol of other similar RTS/CTS mechanism to send data.
In the embodiment of the invention, first address list and second address list have not only comprised address information, also comprise the temporal information that writes down every address information, and just first address list and second address list are the corresponding tabulations of address information and temporal information.
Therefore, the detailed process of upgrading first address list of preserving that comprises source address information according to the source address information of current message comprises: at first judge in first address list of preserving that comprises source address information, whether the source address information of carrying in the current message is arranged, if do not have, source address information and time information corresponding are added in first address list, if have, then the address information that comprises of first address list is constant, only revises this address information time information corresponding.
Equally, second address list of preserving according to the target address information renewal of current message that comprises target address information also comprises: at first judge in second address list of preserving that comprises target address information, whether the target address information that carries in the current message is arranged, if do not have, target address information and time information corresponding are added in second address list, if have, then the address information that comprises of second address list is constant, only revises this address information time information corresponding.
The topological structure of wireless network can be in time, and the adding of work station, exit network and real-time change, therefore, the embodiment of the invention is in the process of data communication, the work at present station also needs first address list and second address list are carried out the aging update processing, can comprise:
Regularly empty the content in first address list and second address list, for example, after can be at every turn first address list and second address list being compared, all the elements in first address list and second address list are deleted.Perhaps,
In the process of upgrading first address list or second address list, the address information that had occurred occurs in the time of setting again, then this address information and the time information corresponding of first address list or the preservation of second address list is deleted.Here, first address list and second address list are the corresponding tabulations of address information and temporal information.Therefore, every address information all has time information corresponding, if an address information time information corresponding is the very first time, with the very first time is the starting point of timing, if in the setting-up time, for example: in 1 hour, this address information is not occurring, promptly this address information time information corresponding is not updated, and still is the very first time, then with this address information and time information corresponding deletion.
Below in conjunction with Figure of description the embodiment of the invention is described in further detail.
Referring to Fig. 3, Infrastructure BSS wireless network architecture topology comprises: the AP of central station, attachment station STA1 and STA2, wherein, AP, STA1 and STA2 can the receiving target address be the message of local address not only, can the receiving target address not be the message of local address also.STA1 and STA2 set up network linking with AP, generally all are to communicate by AP, and when beginning to communicate by letter, acquiescence adopts RTS/CTS mechanism to carry out data communication.Like this, STA1 need judge whether to exist " hiding work station " before AP sends data, according to the result who judges, adopt different data receiver formulas then.
Wherein, the address information that STA1 can carry according to every the message that receives, to first address list of preserving that comprises source address information, or, second address list of preserving that comprises target address information upgrades, here, the first/the second address list comprise address information and with its time information corresponding.Referring to Fig. 4, the processing procedure that STA1 receives message at every turn comprises:
Step 401:STA1 receives a message.
STA1 obtains a message from shared medium.
Step 402:STA1 judges whether the message that receives is that AP sends, and does not send if this message is not AP, and then execution in step 403, if being AP, this message sends, then, execution in step 405.
Wherein, STA1 can wait according to the To DS and From DS fields in the header that receives and judge whether the message that receives is that AP sends.
Here, when STA2 when AP sends message, it is not that AP sends that this message can be judged out, therefore, execution in step 403.
When AP when STA1 or STA2 send message, execution in step 405.
Step 403:, upgrade the first address list TAB1 that comprises source address information that preserves according to the source address information of carrying in the message that receives.
Can at first judge among the TAB1 that comprises source address information of preservation, whether the source address information of carrying in this message is arranged, if do not have, source address information and time information corresponding are added among the TAB1, if have, then the address information that comprises among the TAB1 is constant, only upgrades this source address information time information corresponding.
Here,, and do not have the STA2 address information among the TAB1 of STA1 preservation, then STA2 address information and time information corresponding are recorded among the TAB1 if STA2 sends message to AP.
Step 404:STA1 judges whether the target address information of the message that receives is local address information, if, execution in step 407, otherwise execution in step 408.
If the target address information of data message is exactly the STA1 address information, then execution in step 407.
If the target address information of message is not the STA1 address information, then execution in step 408.
Step 405:STA1 judges whether the target address information of the message that receives is local address information, if not, execution in step 406 is if then execution in step 407.
If the target address information of message is exactly the STA1 address information, show that then AP sends message to STA1, execution in step 407.
If the target address information of message is not the STA1 address information, show that then AP sends message, execution in step 406 to other STA.
Step 406:STA1 upgrades the second address list TAB2 that comprises target address information that preserves according to the target address information that carries in the message that receives, and changes step 408 over to.
Can at first judge among the TAB2 that comprises target address information of preservation, whether the target address information that carries in this message is arranged, if do not have, target address information and time information corresponding are added among the TAB2, if have, then the address information that comprises of TAB2 is constant, just revises this target address information time information corresponding.
Here,, and do not have the STA2 address information among the TAB2 of STA1 preservation, then STA2 address information and time information corresponding are recorded among the TAB2 if AP sends message to STA2.
Step 407:STA1 handles the message that receives.
The target address information of the message that receives is exactly the STA1 address information, the message that the STA1 normal process receives.
Step 408:STA1 abandons the message that receives.
The target address information of the message that receives is not the STA1 address information, the packet loss of the idol that STA1 directly will receive.
In embodiments of the present invention, message of the every reception of STA1 promptly carries out once above-mentioned processing, may upgrade TAB1 or TAB2, and possibility TAB1 and arbitrary one of TAB2 do not upgrade yet.Like this, at set intervals, after STA1 finds that address information that TAB1 or TAB2 comprise has renewal, TAB1 and TAB2 after upgrading are compared, whether the address information that comparison TAB1 and TAB2 comprise is in full accord, then, according to comparative result, just can determine whether to open RTS/CTS mechanism and send data.
Here, before carrying out transfer of data, if TAB1 and TAB2 that STA1 preserves are empty set, and the message that receives for the first time of STA1, be the message that STA2 sends to AP, then STA2 address information and time information corresponding are recorded among the TAB1; The message that STA1 receives for the second time is the message that AP sends to STA2, then, STA2 address information and time information corresponding is recorded among the TAB2; At this moment, STA1 compares TAB1 and TAB2, the address information unanimity that both comprise, so, STA1 has known that the communication parter of AP also comprises STA2, like this, STA1 is monitoring shared medium during the free time, because of determining there be not " hiding work station ", then directly sends message to AP.
If also comprise STA3 in the network configuration topology in the present embodiment, and STA1 is before carrying out transfer of data, TAB1 and TAB2 that STA1 preserves are empty set, and the message that STA1 receives for the first time, be the message that STA2 sends to AP, then STA2 address information and time information corresponding recorded among the TAB1; The message that STA1 receives for the second time is the message that AP sends to STA3, then STA3 address information and time information corresponding is recorded among the TAB2; At this moment, STA1 compares TAB1 and TAB2, the address information that both comprise is inconsistent, so, STA1 has not known the communication parter that AP is all, and STA1 is monitoring shared medium during the free time, because of may also there being " hiding work station ", then must send the RTS message to AP earlier, after receiving the CTS message that AP returns, send message to AP again.
In the above-described embodiments, each address information of carrying according to the message that receives, upgrade first address list of preserving that comprises source address information, or, in the process of second address list of preserving that comprises target address information, be to judge that earlier current message is that the central station sends, and then judge that the target address information of current message is a local address information.In the embodiment of the invention, can also judge earlier that the target address information of current message is a local address information, and then judge that current message is that the central station sends, and specifically can comprise:
After the target address information of judging current message is local address information, handle current message, judge that then current message is that the central station sends, if current message is not that the central station sends, then, upgrade first address list of preserving that comprises source address information according to the source address information of current message.
After the target address information of judging current message is not local address information, target address information according to current message, upgrade second address list of preserving that comprises target address information, judge that then current message is that the central station sends, if current message is not that the central station sends, then, upgrade first address list of preserving that comprises source address information, and abandon current message according to the source address information of current message; If current message is that the central station sends, directly abandon current message.
Method according to above-mentioned transfer of data, work station can be arbitrary network equipment in the cordless communication network, its network interface card drives must be set to promiscuous mode, just, work station can the receiving target address be the message of local address not only, can the receiving target address not be the message of local address also.Referring to Fig. 5, in the embodiment of the invention, work station comprises: receiving element 100, updating block 200 and comparing unit 300.
Receiving element 100 is used to receive at least one message.
Updating block 200, be used for when the current message that receives be not that the central station is when sending, source address information according to described current message, upgrade first address list of preserving that comprises source address information, when the current message that receives is that the central station sends, and when the target address information of described current message is not local address information,, upgrade second address list of preserving that comprises target address information according to the target address information of described current message.
Comparing unit 300 is used for described first address list and second address list are compared, and according to comparative result, determines whether to adopt Handshake Protocol to send data.
Wherein, when the target address information of the current message that receives is a local address information, work station also need be handled described current message; When the target address information of the current message that receives is not a local address information, then work station directly abandons current message.Therefore, this work station also comprises: processing unit is used for handling described current message when the target address information of the current message that receives is local address information.And work station also comprises: discarding unit is used for abandoning described current message when the target address information of the current message that receives is not local address information.
After the target address information that the source address information that comparing unit 300 comprises first address list and second address list comprise compares, when the address information that comprises when first address list and second address list is identical, determine not adopt RTS/CTS mechanism or other similar Handshake Protocols to send data, when the address information that comprises when first address list and second address list is inequality, determine to adopt RTS/CTS mechanism or other similar Handshake Protocols to send data.
Certainly, in the embodiment of the invention, work station also comprises: the aging update unit is used for described first address list and/or second address list are carried out the aging update processing.Wherein, the aging update unit can regularly empty the content in described first address list and second address list; Or, in the process of upgrading described first address list or second address list, in the time that the address information of having preserved is being set, occur again, then this address information of first address list or the preservation of second address list is deleted.
In sum, in the embodiment of the invention, the address information that at first carry according at least one message that receives at the work at present station, upgrade first address list of preserving that comprises source address information, or, second address list of preserving that comprises target address information, promptly when the current message that receives be not that the central station is when sending, the work at present station is according to the source address information of described current message, upgrade first address list of preserving that comprises source address information, when the current message that receives is that the central station sends, and when the target address information of described current message is not local address information, the work at present station is according to the target address information of described current message, upgrade second address list of preserving that comprises target address information, the target address information that comprises of the source address information that described first address list is comprised and second address list compares then, when the target address information that the source address information that comprises when first address list and second address list comprise is identical, can determine not have " hiding work station ", then the work at present station can not adopt RTS/CTS mechanism to send data, thereby process in data communication, reduce the RTS/CTS mechanism of using, can avoid using the waste of the wireless network resource that RTS/CTS mechanism causes, increase the throughput of wireless network, and accelerated message response speed.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. the method for a transfer of data is characterized in that, comprising:
Receive at least one message, when the current message that receives is not that the central station is when sending, source address information according to described current message, upgrade first address list of preserving that comprises source address information, when the current message that receives is that the central station sends, and when the target address information of described current message is not local address information,, upgrade second address list of preserving that comprises target address information according to the target address information of described current message;
The target address information that the source address information that described first address list is comprised and second address list comprise compares, when the target address information that the source address information that comprises when described first address list and second address list comprise is identical, determine not adopt Handshake Protocol to send data;
When the target address information that the source address information that comprises when described first address list and second address list comprise is inequality, determine to adopt Handshake Protocol to send data.
2. the method for claim 1 is characterized in that, also comprises:
When the target address information of the current message that receives is local address information, handle described current message; Otherwise, abandon described current message.
3. the method for claim 1 is characterized in that, described Handshake Protocol sends RTS/CTS mechanism for request transmission/permission.
4. the method for claim 1 is characterized in that, described method also comprises: described first address list and/or second address list are carried out the aging update processing.
5. method as claimed in claim 4 is characterized in that, described first address list and/or second address list is carried out aging update handle and comprise:
Regularly empty the content in described first address list and second address list; Or,
In the process of upgrading described first address list or second address list, when not occurring again in the time that the address information of having preserved is being set, with this address information deletion of preserving in first address list or second address list.
6. the work station of a transfer of data is characterized in that, comprising:
Receiving element is used to receive at least one message;
Updating block, be used for when the current message that receives be not that the central station is when sending, source address information according to described current message, upgrade first address list of preserving that comprises source address information, when the current message that receives is that the central station sends, and when the target address information of described current message is not local address information,, upgrade second address list of preserving that comprises target address information according to the target address information of described current message;
Comparing unit, being used for the target address information that the source address information that described first address list is comprised and second address list comprise compares, when the target address information that the source address information that comprises when described first address list and second address list comprise is identical, determine not adopt Handshake Protocol to send data;
When the target address information that the source address information that comprises when described first address list and second address list comprise is inequality, determine to adopt Handshake Protocol to send data.
7. work station as claimed in claim 6 is characterized in that, also comprises:
Processing unit is used for handling described current message when the target address information of the current message that receives is local address information;
Discarding unit is used for abandoning described current message when the target address information of the current message that receives is not local address information.
8. work station as claimed in claim 6 is characterized in that, described comparing unit comprises:
First determines subelement, is used for target address information that the source address information that comprises when described first address list and second address list comprise when identical, determines not adopt the machine-processed transmission of RTS/CTS data;
Second determines subelement, is used for the target address information that comprises when described first address list and the source address information that comprises and second address list when inequality, determines to adopt the machine-processed transmission of RTS/CTS data.
9. work station as claimed in claim 6 is characterized in that, also comprises:
The aging update unit is used for described first address list and/or second address list are carried out the aging update processing.
10. work station as claimed in claim 9 is characterized in that, described aging update unit comprises:
Empty subelement, be used for regularly emptying the content of described first address list and second address list;
The deletion subelement is used in the process of upgrading described first address list or second address list, when not occurring in the time that the address information of having preserved is being set, with this address information deletion of first address list or the preservation of second address list again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101656163A CN101631337B (en) | 2009-08-06 | 2009-08-06 | Method and device of data transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101656163A CN101631337B (en) | 2009-08-06 | 2009-08-06 | Method and device of data transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101631337A CN101631337A (en) | 2010-01-20 |
| CN101631337B true CN101631337B (en) | 2011-11-09 |
Family
ID=41576228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101656163A Expired - Fee Related CN101631337B (en) | 2009-08-06 | 2009-08-06 | Method and device of data transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101631337B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9433016B2 (en) | 2013-06-25 | 2016-08-30 | Futurewei Technologies, Inc. | System and method for detecting and resolving conflicts |
| CN113438688B (en) * | 2021-06-24 | 2023-06-06 | 普联技术有限公司 | Hidden node detection method and detection device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101022457A (en) * | 2007-03-12 | 2007-08-22 | 北京交通大学 | Radio multi-hopping network audio frequency, data transmission nodal equipment |
| CN101217498A (en) * | 2008-01-18 | 2008-07-09 | 北京科技大学 | A self-organizing network routing method based on data message point-to-point decision making |
-
2009
- 2009-08-06 CN CN2009101656163A patent/CN101631337B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101022457A (en) * | 2007-03-12 | 2007-08-22 | 北京交通大学 | Radio multi-hopping network audio frequency, data transmission nodal equipment |
| CN101217498A (en) * | 2008-01-18 | 2008-07-09 | 北京科技大学 | A self-organizing network routing method based on data message point-to-point decision making |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101631337A (en) | 2010-01-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8446907B2 (en) | Medium access control method and apparatus in wireless distributed network | |
| US7602759B2 (en) | Wireless LAN system making quality of communication improve and a communication method therefor | |
| JP5415533B2 (en) | Communication method and communication station | |
| US20020093929A1 (en) | System and method for sharing bandwidth between co-located 802.11a/e and HIPERLAN/2 systems | |
| CN101394626B (en) | Distributed service differentiating method and device based on WLAN | |
| EP2736299A1 (en) | System and method for multi-mode radio operation | |
| EP1931086A2 (en) | A method and system for coexistence between 20 MHZ and 40 MHZ overlapping basic service sets (OBSS) in wireless local area networks | |
| EP2572524A1 (en) | Methods and apparatuses for discovery of the capabilities of wlan stations for direct link setup | |
| US20160081120A1 (en) | Communications method and device for single-frequency wireless local area network | |
| KR20050091774A (en) | Method and apparatus for bandwidth provisioning in a wlan | |
| CN101582818A (en) | Method and device for reducing spending of control signal in mixed wireless network | |
| US20070223412A1 (en) | Method for Signal Transmission in a Radio Communication System | |
| WO2008005770A2 (en) | System and method for optimized wireless client communication | |
| US20060120334A1 (en) | Enhanced direct link transmission method and system for wireless local area networks | |
| Chen et al. | Performance analysis and enhancement for IEEE 802.11 MAC protocol | |
| CN101631337B (en) | Method and device of data transmission | |
| US7356335B2 (en) | Wireless communication apparatus | |
| US7508802B2 (en) | Method of controlling wireless local network medium access using pseudo-time division multiplexing | |
| CN112512082A (en) | Transmission method, device, communication node and storage medium of wireless network | |
| US7822422B2 (en) | Wireless communication system for improved transmission priority control | |
| WO2006068710A1 (en) | Methods of wireless backhaul in a multi-tier wlan | |
| US20070133431A1 (en) | Media access control method in wireless local area network | |
| US20040203818A1 (en) | Wireless LAN (local area network) connection approach based on bandwidth | |
| US20040196817A1 (en) | Method and device for prefetching frames | |
| CN102547785A (en) | Detection method and system for enhanced virtual carrier waves |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111109 Termination date: 20150806 |
|
| EXPY | Termination of patent right or utility model |