CN101610238A - Direct-connected ability discovery method, access point, source station and direct-connected system - Google Patents
Direct-connected ability discovery method, access point, source station and direct-connected system Download PDFInfo
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- CN101610238A CN101610238A CNA2008100288028A CN200810028802A CN101610238A CN 101610238 A CN101610238 A CN 101610238A CN A2008100288028 A CNA2008100288028 A CN A2008100288028A CN 200810028802 A CN200810028802 A CN 200810028802A CN 101610238 A CN101610238 A CN 101610238A
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Abstract
The embodiment of the invention discloses a kind of direct-connected ability discovery method, access point, source station and direct-connected system.Described direct-connected ability discovery method comprises: receive the Frame from the source station; When direct-connected condition is satisfied in described source station and point of destination, send to described point of destination and to carry the Frame that possesses direct-connected ability between described source station of indication and described point of destination, described point of destination is known between described source station and described point of destination possessed direct-connected ability.Adopt the embodiment of the invention, the blindness problem of direct-connected request is initiated in the point of destination that solves Frame, reduces unnecessary direct-connected request message amount, has saved system resource, and simple.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of direct-connected ability discovery method, access point, source station and direct-connected system.
Background technology
(Station, STA), the network system that several STA form by 802.11 agreements is called Basic Service Set (Basic Service Set, BSS) system will to support the equipment of 802.11 agreements to be called the station in 802.11 standards.
A STA can support that (STA of this moment is called as AP to access point for Access Point, AP) function; A STA can not support the AP function, and the STA of this moment is called as the STA (Non-APSTA) of non-AP, for convenient, hereinafter with the abbreviation of STA as Non-AP STA.
In BSS, because AP is the bottleneck of a limiting network throughput, in order to improve network throughput and (the Quality of Service that improves service quality, QoS), there is a kind of direct-connected method between STA in the prior art, this method allows to be associated with between the STA that two of same AP support QoS and can direct-connectedly communicate by letter, main process is, initiate the direct-connected STA that sets up process direct-connected request is sent to AP, medium access control (the MediaAccess Control that comprises opposite end STA in this direct-connected request message, MAC) address, if AP judges that obtaining opposite end STA is not associated with oneself (judging promptly whether direct-connected STA and its opposite end STA that sets up process of initiation satisfies direct-connected condition), then refuse this direct-connected request, otherwise direct-connected request is transmitted to opposite end STA, opposite end STA according to circumstances accepts or refuse direct-connected request afterwards, and is direct-connected if opposite end STA does not support, then can not respond this direct-connected request.
Owing to initiate the STA of direct-connected request and do not know whether opposite end STA is related with own related AP, also and not know whether opposite end STA supports direct-connected, promptly initiate the STA of direct-connected request and do not know whether oneself and opposite end STA satisfy direct-connected condition, therefore, it is blindly that STA initiates direct-connected request, increase unnecessary direct-connected request message amount, increased system loading, taken more system resources.
Summary of the invention
Embodiment of the invention technical problem to be solved is, a kind of direct-connected ability discovery method, a kind of access point, a kind of source station and a kind of direct-connected system have been proposed, can solve the blindness problem that STA initiates direct-connected request, reduce unnecessary direct-connected request message amount, reduce system loading, saved system resource.
In order to solve the problems of the technologies described above, the embodiment of the invention has proposed a kind of direct-connected ability discovery method, comprising:
Reception is from the Frame of source station; Carry the direct-connected capability indication information of this source station in the described Frame;
When direct-connected condition is satisfied in described source station and point of destination, send to the point of destination and to carry the Frame that possesses direct-connected ability between described source station of indication and described point of destination, described point of destination is known between described source station and described point of destination possessed direct-connected ability.
Correspondingly, the embodiment of the invention also provides a kind of access point, comprising:
Receiving element receives the Frame from the source station;
Transmitting element when direct-connected condition is satisfied in described source station and point of destination, sends to the point of destination and to carry the Frame that possesses direct-connected ability between described source station of indication and described point of destination, described point of destination is known between described source station and described point of destination possessed direct-connected ability.
Correspondingly, the embodiment of the invention also provides a kind of source station, comprising:
Frame is provided with the unit, is used in the control field of the Frame that sends to access point the direct-connected direct-connected capability indication information of the described source station support of expression being set;
The Frame transmitting element is used for being sent in control field to access point and is provided with the Frame that direct-connected capability indication information is supported in the described source station of expression.
Correspondingly, the embodiment of the invention also provides a kind of direct-connected system, comprise the access point that links to each other with the point of destination of source station that sends Frame and receiving data frames, described access point, be used to receive described Frame, when direct-connected condition is satisfied in described source station and point of destination, send to the point of destination and to carry the Frame that possesses direct-connected ability between described source station of indication and described point of destination, described point of destination is known between described source station and described point of destination possessed direct-connected ability.
Implement the embodiment of the invention, send Frame by the source station to the point of destination, after the Frame of transmitting through access point is received in the point of destination, can judge the other side whether with own in same BSS, whether can be direct-connected between source station and the point of destination, and further know the source station whether support direct-connected, thereby the blindness of direct-connected request is initiated in the point of destination that solves Frame, reduce unnecessary direct-connected request message amount and system loading, saved system resource.
Description of drawings
Fig. 1 is the first embodiment schematic flow sheet of direct-connected ability discovery method of the present invention;
Fig. 2 is the second embodiment schematic flow sheet of direct-connected ability discovery method of the present invention;
Fig. 3 is the composition schematic diagram of direct-connected system embodiment of the present invention;
Fig. 4 is the composition schematic diagram of source station embodiment in as shown in Figure 3 the direct-connected system;
Fig. 5 is the composition schematic diagram of access point embodiment in as shown in Figure 3 the direct-connected system.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the invention is elaborated.
Fig. 1 is the first embodiment schematic flow sheet of the direct-connected ability discovery method of the embodiment of the invention;
Need to prove that described source station and point of destination are satisfied direct-connected condition and comprised: described point of destination is associated with this access point; Described Frame from the source station is the quality of service data frame; Described source station is associated with this access point; Perhaps also comprise being provided with in the control field of described Frame from the source station and show that described source station supports direct-connected direct-connected capability indication information.
Sending the described Frame that carries the direct-connected capability indication information that is used to indicate described source station and point of destination to satisfy direct-connected condition to described point of destination described in the step 101 is specially:
In the control field of described Frame from the source station, be provided for indicating described source station and point of destination to satisfy the direct-connected capability indication information of direct-connected condition;
Described Frame after the transmission of described point of destination is provided with.
Implement first embodiment of of the present invention direct-connected ability discovery method as shown in Figure 1, can be under the situation that does not increase new management frames, solve the blindness problem that direct-connected request is initiated in the point of destination, reduce unnecessary direct-connected request message amount and system loading, saved system resource.
Fig. 2 is the second embodiment schematic flow sheet of the direct-connected ability discovery method of the embodiment of the invention;
With reference to this figure, this method flow mainly comprises:
Step 200, access point (representing with AP) receive from the source station Frame of (representing with STA1); Be that STA1 is as the source station that sends this Frame;
Step 201, AP judge the point of destination (representing) of STA1 and Frame with STA2 whether all be associated with this AP, STA1 whether support direct-connected, thereby judge whether STA1 and STA2 satisfy direct-connected condition;
When specific implementation, because AP can write down the information of all STA that are associated with oneself, AP can judge at an easy rate whether STA1, STA2 are associated with oneself so, and this is that present technique field personnel are known, does not repeat them here; Whether whether STA1 supports direct-connected can be that QoS Frame (being whether STA1 is the STA that supports QoS) obtains by the judgment data frame, when described Frame is the QoS Frame, can be judged as STA1 and supports direct-connectedly, does not support direct-connected otherwise be judged as STA1; Support the non-QoS Frame of STA QoS Frame that sends and the STA transmission of not supporting QoS of QoS to come subregion with the different values of an information bit in the control field, this is that present technique field personnel are known, does not repeat them here; Certainly, the embodiment of the invention do not get rid of one of other employing independently the information bit direct representation STA that sends Frame whether support direct-connected;
Step 202, when AP judges that STA1 and STA2 all are associated with this AP and STA1 support service quality, AP is before transmitting described Frame to STA2, in the control field of described Frame, be provided for indicating described source station STA1 and point of destination STA2 to satisfy the direct-connected capability indication information of direct-connected condition, during specific implementation, can use a bit that keeps in the QoS control field of described Frame, bit 7 as shown in table 1 below:
Table 1
| Frame type | Bit 0-3 | Bit 4 | Bit 5-6 | Bit 7 | Bit 8-15 |
| QoS (+) poll frame that AP sends | ?TID | Seeervice cycle finishes | The Frame acknowledgment strategy | Keep | The send opportunity restriction |
| The QoS Frame that AP sends, the empty frame of QoS, QoS acknowledgement frame | ?TID | Seeervice cycle finishes | The Frame acknowledgment strategy | Keep | The AP buffer status that economizes on electricity |
| Non-AP STA sends | ?TID | ??0 | The Frame acknowledgment strategy | Keep | The send opportunity window of request |
| The QoS Frame | ?TID | ??1 | The Frame acknowledgment strategy | Keep | Queue size |
The QoS control field one of Frame shown in the last table 1 has two bytes, 16 bits, wherein bit 7 does not use and as the bit that keeps, therefore can make bit 7 be used to indicate STA1 and STA2 whether to satisfy direct-connected condition (being that bit 7 is as direct-connected capability indication information) in the specific implementation; According to the prior art regulation, bit 7 is filled with 0, and so this moment, AP can put described bit 71 to indicate STA1 and STA2 to satisfy direct-connected condition, can be direct-connected; The AP that has disposed for compatibility, also can be that be defined as in 0 o'clock can be direct-connected with bit 7, and be that clearly represented in 1 o'clock can not be direct-connected, like this, when supporting the STA of direct-connected ability discovery method of the present invention under the AP of the direct-connected ability discovery method of not supporting the embodiment of the invention, to use, can not miss potential direct-connected chance yet; The value of the bit 7 here can also be judged or the like in conjunction with the protocol version information in the frame head is comprehensive; Therefore always can indicate direct-connected ability with an information;
Step 203, AP carries out other frames to the Frame that carries direct-connected capability indication information described in the step 202 to be handled, for example, AP is before transmitting described Frame, frame head need re-construct, and may need original Frame is deciphered earlier and encrypted again before forwarding, the judgement and the set operation that therefore increase direct-connected ability can not increase a lot of burdens to AP;
In step 204, AP transmits described Frame after step 203 is handled to STA2.
Implement second embodiment of of the present invention direct-connected ability discovery method as shown in Figure 2, can under the situation that does not increase new management frames, solve the blindness problem that direct-connected request is initiated in the point of destination, reduce unnecessary direct-connected request message amount, reduce system loading, saved system resource.
Referring to Fig. 3, be the composition schematic diagram of the direct-connected system embodiment of the embodiment of the invention.
The source station 1 (STA1) and the access point 3 (AP3) that comprise Frame, for the ease of understanding, the direct-connected system in the embodiment of the invention can also comprise point of destination 2 (STA2).
Described source station 1 (STA1) is used for sending Frame to described access point 3 (AP3);
Described access point 3 (AP3) is used for receiving the Frame from described source station 1 (STA1); When described source station 1 (STA1) and point of destination 2 (STA2) when satisfying direct-connected condition, send to carry to described point of destination 2 (STA2) and be used to indicate described source station 1 (STA1) and point of destination 2 (STA2) to satisfy the described Frame of the direct-connected capability indication information of direct-connected condition, described point of destination 2 (STA2) is known between described source station 1 (STA1) and described point of destination 2 (STA2) possessed direct-connected ability;
Described point of destination 2 (STA2) is used for receiving from carrying of access point 3 (AP3) and indicates described source station 1 (STA1) and point of destination 2 (STA2) to satisfy the Frame of the direct-connected capability indication information of direct-connected condition; And according to described direct-connected capability indication information, and set up direct-connected between described source station 1 (STA1).What need supplementary notes is, the direct-connected system that the embodiment of the invention provides do not pay close attention to described point of destination receive Frame after how about handle, only pay close attention to source station and access point and how to find having direct-connected ability between source station and the point of destination.
Implement the embodiment of direct-connected system of the present invention as shown in Figure 3, can under the situation that does not increase new management frames, solve the blindness problem that direct-connected request is initiated in the point of destination, reduce unnecessary direct-connected request message amount, reduce system loading, saved system resource.
Referring to Fig. 4, be the composition schematic diagram of source station embodiment in the direct-connected system as shown in Figure 3;
Described source station 1 (STA1) comprising:
Frame is provided with unit 11, is used in the control field of the Frame that sends to access point the direct-connected direct-connected capability indication information of the described source station support of expression being set;
Need to prove, the direct-connected capability indication information of carrying in the described Frame can be that described Frame is the QoS Frame, with expression STA1 is the STA that supports QoS, promptly support direct-connected STA, rephrase the statement, when described Frame was the QoS Frame, it was direct-connected to represent that STA1 supports, otherwise that STA1 does not support is direct-connected; Support the non-QoS Frame of STA1 QoS Frame that sends and the STA transmission of not supporting QoS of QoS to come subregion with the different values of an information bit in the frame head control field, this is that present technique field personnel are known, does not repeat them here; Certainly, the embodiment of the invention do not get rid of one of other employing independently the information bit direct representation STA that sends Frame whether support direct-connected direct-connected capability indication information;
Frame transmitting element 12 is used for being sent in the Frame that control field is provided with direct-connected capability indication information to access point.
Implement the embodiment of source station of the present invention as shown in Figure 4, by in the Frame that sends to access point, carrying the indication information of its direct-connected ability of expression, can be under the situation that does not increase new management frames, make the point of destination of receiving data frames obtain the direct-connected ability information of source station, solve purpose and initiate the blindness problem of direct-connected request, reduce unnecessary direct-connected request message amount, reduce system loading, saved system resource.
Referring to Fig. 5, be the composition schematic diagram of access point embodiment in the direct-connected system as shown in Figure 3;
The access point of present embodiment (AP) 3 comprises: receiving element 31, judging unit 32 and transmitting element 33.
Annexation between each unit and function such as following:
Receiving element 31 receives the Frame from source station 1 (STA1);
Judging unit 32 is used to judge whether described source station 1 (STA1) and point of destination 2 (STA2) satisfy direct-connected condition.
Described judging unit 32 comprises:
First judging unit 321 judges whether described point of destination 2 (STA2) is associated with this access point 3 (AP3); Whether described Frame from source station 1 (STA1) is the quality of service data frame; Whether described source station 1 (STA1) is to be associated with this access point 3 (AP3);
When specific implementation, because AP3 records the information at all stations (STA) that are associated with oneself, first judging unit 321 in the judging unit 32 of AP3 judges that at an easy rate whether STA1, STA2 are associated with oneself, are not described in detail here;
It is direct-connected that described first judging unit 321 needs also to judge whether STA1 supports, whether STA1 supports whether direct-connected can be that QoS Frame (being whether STA1 is the STA that supports QoS) obtains by judging described Frame, when described Frame is the QoS Frame, it is direct-connected to be judged as the STA1 support, does not support direct-connected otherwise be judged as STA1;
Further, described judging unit 32 can also comprise:
Can judge by the judgement of above-mentioned first judging unit 321, second judging unit 322 whether STA1 and STA2 satisfy direct-connected condition;
Transmitting element 33, when described source station 1 (STA1) and point of destination 2 (STA2) when satisfying direct-connected condition, send to carry to described point of destination 2 (STA2) and be used to indicate described source station 1 (STA1) and point of destination 2 (STA2) to satisfy the described Frame of the direct-connected capability indication information of direct-connected condition, described point of destination (STA2) is known between described source station (STA1) and described point of destination (STA2) possessed direct-connected ability.
In the transmitting element 33 subelement 331 is set, when judging unit 32 judges that STA1 and STA2 satisfy direct-connected condition, in the control field of the described STA1 of being received from Frame, be provided for indicating described STA1 and STA2 to satisfy the information of the direct-connected ability indication of direct-connected condition, during specific implementation, can use a bit that keeps in the QoS control field of described Frame, bit 7 as shown in table 1, the QoS control field one of Frame shown in the table 1 has two bytes, 16 bits, wherein bit 7 does not use and as the bit that keeps, therefore can make bit 7 be used to indicate STA1 and STA2 whether to satisfy direct-connected condition (being that bit 7 is as direct-connected capability indication information) in the specific implementation; According to the prior art regulation, bit 7 is filled with 0, so this moment, described bit 7 can be put 1 to indicate STA1 and STA2 to satisfy direct-connected condition, can be direct-connected; The AP that has disposed for compatibility, also can be that be defined as in 0 o'clock can be direct-connected with bit 7, and be that clearly represented in 1 o'clock can not be direct-connected, like this, when the STA of the described direct-connected ability discovery method of the support embodiment of the invention uses, can not miss potential direct-connected chance under the AP of the direct-connected ability discovery method of not supporting the embodiment of the invention yet; The value of the bit 7 here can also be judged or the like in conjunction with the protocol version information in the frame head is comprehensive; Therefore always can indicate direct-connected ability with an information; In addition, this is provided with subelement 331 can also carry out the processing of other framings to the described above-mentioned step gained Frame that is provided with, for example, before sending the described Frame of subelement 332 forwardings, frame head need re-construct, and may need original Frame deciphered earlier and encrypt again before forwarding etc.;
Particularly, through above-mentioned subelement 331 be set handle after, the Frame that AP3 will be to be transmitted sends to STA2.
Implement the embodiment of access point of the present invention as shown in Figure 5, access point receives the Frame that the source station sends, can be under the situation that does not increase new management frames, make the point of destination of receiving data frames obtain the direct-connected ability information of source station, solve the blindness problem that direct-connected request is initiated in the point of destination, reduce unnecessary direct-connected request message amount, reduce system loading, saved system resource.
In addition, one of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method, be to instruct relevant hardware to finish by program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
The above is the specific embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also are considered as protection scope of the present invention.
Claims (11)
1, a kind of direct-connected ability discovery method is characterized in that, comprising:
Reception is from the Frame of source station;
When direct-connected condition is satisfied in described source station and point of destination, send to described point of destination and to carry the Frame that possesses direct-connected ability between described source station of indication and described point of destination, described point of destination is known between described source station and described point of destination possessed direct-connected ability.
2, direct-connected ability discovery method as claimed in claim 1 is characterized in that, described source station and point of destination are satisfied direct-connected condition and comprised:
Described point of destination is associated with this access point;
Described Frame from the source station is the quality of service data frame;
Described source station is associated with this access point.
3, direct-connected ability discovery method as claimed in claim 2 is characterized in that, described source station and point of destination are satisfied direct-connected condition and also comprised:
Be provided with in the control field of described Frame from the source station and show that described source station supports direct-connected direct-connected capability indication information.
4, as claim 2 or 3 described direct-connected ability discovery methods, describedly send the described Frame that carries the direct-connected capability indication information that is used to indicate described source station and point of destination to satisfy direct-connected condition to described point of destination, comprising:
In the control field of described Frame from the source station, be provided for indicating described source station and point of destination to satisfy the direct-connected capability indication information of direct-connected condition;
Described Frame after the transmission of described point of destination is provided with.
5, a kind of access point is characterized in that, comprising:
Receiving element receives the Frame from the source station;
Transmitting element when direct-connected condition is satisfied in described source station and point of destination, sends to the point of destination and to carry the Frame that possesses direct-connected ability between described source station of indication and described point of destination, described point of destination is known between described source station and described point of destination possessed direct-connected ability.
6, access point as claimed in claim 5 is characterized in that, described access point also comprises:
Judging unit links to each other with described transmitting element, is used to judge whether described source station and point of destination satisfy direct-connected condition.
7, access point as claimed in claim 6 is characterized in that, described judging unit comprises:
First judging unit is used to judge whether described point of destination is associated with this access point; Whether described Frame from the source station is the quality of service data frame; Whether described source station is associated with this access point.
8, access point as claimed in claim 7 is characterized in that, described judging unit also comprises:
Whether second judging unit, the control field that is used for judging described Frame from the source station are provided with shows that described source station supports direct-connected direct-connected capability indication information.
9, as claim 7 or 8 described access points, it is characterized in that, comprise in the described transmitting element:
Subelement is set, is used for being provided for indicating described source station and point of destination to satisfy the direct-connected capability indication information of direct-connected condition in the control field of described Frame from the source station;
Send subelement, be used for the described Frame after the transmission of described point of destination is provided with.
10, a kind of source station is characterized in that, comprising:
Frame is provided with the unit, is used in the control field of the Frame that sends to access point the direct-connected direct-connected capability indication information of the described source station support of expression being set;
The Frame transmitting element is used for being sent in control field to access point and is provided with the Frame that direct-connected capability indication information is supported in the described source station of expression.
11, a kind of direct-connected system comprises the access point that links to each other with the point of destination of source station that sends Frame and receiving data frames, it is characterized in that:
Described access point, be used to receive described Frame, when direct-connected condition is satisfied in described source station and point of destination, transmission carries the Frame that possesses direct-connected ability between described source station of indication and described point of destination to the point of destination, described point of destination is known between described source station and described point of destination possessed direct-connected ability.
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| WO2016176801A1 (en) * | 2015-05-04 | 2016-11-10 | 华为技术有限公司 | Method and apparatus for direct connection communication |
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| WO2016176801A1 (en) * | 2015-05-04 | 2016-11-10 | 华为技术有限公司 | Method and apparatus for direct connection communication |
| CN106716965A (en) * | 2015-05-04 | 2017-05-24 | 华为技术有限公司 | Method and apparatus for direct connection communication |
| CN106716965B (en) * | 2015-05-04 | 2020-01-10 | 华为技术有限公司 | Method and apparatus for direct communication |
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