CN100488138C - Method of inquiring scanning in radio broadband access system - Google Patents
Method of inquiring scanning in radio broadband access system Download PDFInfo
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- CN100488138C CN100488138C CNB2005100890220A CN200510089022A CN100488138C CN 100488138 C CN100488138 C CN 100488138C CN B2005100890220 A CNB2005100890220 A CN B2005100890220A CN 200510089022 A CN200510089022 A CN 200510089022A CN 100488138 C CN100488138 C CN 100488138C
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Abstract
This invention discloses a method for requiring scanning in a wireless broadband access system used in the wireless broadband access system containing MSS and BS including: MSS determines adjacent BS information asking for scanning currently and their scanning kinds: A, said MSS transmits a scan request to service BS asking for carrying the adjacent BS information requiring for scan currently and the corresponding scanning kinds, B, said BS gets the information and the related scan kinds based on the received scan request.
Description
Technical field
The present invention relates to the WiMAX access technology, particularly ask method for scanning in the wireless broadband access system.
Background technology
World Interoperability for Microwave Access, WiMax technology (WiMAX, World Interoperability forMicrowave Access) is that a kind of mobile wireless wide-band that ieee standard is organized to set up inserts standard, claims the IEEE802.16 standard again.The WiMAX system is made up of base station (BS, Basic Station) and travelling carriage (MSS, Mobile Subscribe Station) two parts, and the electromagnetic wave that transmits and receives by radio receiving-transmitting unit wirelessly between BS and the MSS communicates.Each BS has its coverage, and BS can communicate with each BS in its coverage.At synchronization, a BS can communicate with a plurality of MSS in its coverage, but MSS can only keep communicating by letter with a BS, and this BS just is called as the serving BS broadcasts of this MSS.But along with moving of MSS, MSS may successively pass the coverage of a plurality of BS, at this moment, the serving BS broadcasts of MSS will change, and MSS will successively proceed communication to the BS that satisfies the communication quality requirement as the serving BS broadcasts of oneself, and this process is exactly usually said switching.
For the continuity that guarantees to communicate by letter, reduce to switch the communication disruption that may bring, MSS also will continue to detect the signal quality of each neighbor bss when keeping proper communication with current serving BS broadcasts, with the target BS of determining to switch, this process that continues to detect scans exactly.Like this, in case need to switch, MSS just can switch to new communication quality BS preferably rapidly.Therefore scanning process is to guarantee to switch the committed step of carrying out smoothly.Wherein, scanning mainly is divided into two classes: one, simple scanning, and the just simple signal quality that detects neighbor bss of MSS is noted the foundation of select target BS when switching in the future with it; Two, related scanning (association), MSS is except the signal quality that detects neighbor bss, also attempting carrying out initial up emission parameter with each neighbor bss proofreaies and correct to obtain correction parameter, this step all must do when MSS and arbitrary BS set up correspondence just and up emission parameter is proofreaied and correct, if when scanning, just fulfiled ahead of schedule this step, when just switching to this BS so surely, just can shorten the process of setting up correspondence with this BS.In addition, related scanning is divided three classes again: the association scanning (association level0) of rank 0, the association scanning (associationlevel1) of rank 1, the association scanning (association level2) of rank 2.When adopting the association scanning of level0, serving BS broadcasts can not done any aid in treatment for the association scanning of MSS; When adopting the association scanning of level1, serving BS broadcasts will assist MSS to hold consultation with neighbor bss in advance, and the notice neighbor bss will carry out association scanning, and asking is MSS distribution ascending resource in advance, thereby make things convenient for MSS transmission upstream data; When adopting the association scanning of level2, further increasing a miscellaneous function: MSS on the association scanning basis of level1 when each neighbor bss transmission data is carried out association scanning, each neighbor bss returns correction parameter and gives current service BS, will be concentrated from the correction parameter of each neighbor bss by this serving BS broadcasts and issue MSS.Therefore, the scan type of WiMAX system has four kinds at present: the association scanning of the association scanning of simple scanning, level0, the association scanning of level1, level2.
When MSS prepares scanning neighbor BS, at first send scan request to current service BS, this scan request is carried information such as the scan type of current request, the neighbor bss of asking scanning, scanning number of repetition; Serving BS broadcasts is returned the scanning response again and is given MSS, and the scan type of the definite current scanning of serving BS broadcasts, the neighbor bss of determining scanning, scanning time started, number of repetition, the information such as ascending resource that neighbor bss is reserved to MSS are carried in this scanning response.Described scan request can be carried by motion scan request (MOB_SCN-REQ) message, and described scanning response can be replied (MOB_SCN-RSP) message by motion scan and carried.
In existing protocol, MOB_SCN-REQ message or MOB_SCN-RSP message use related scan type (association type) territory of self to carry the scan type of current request or current scanning, this association type territory comprises three bits, once can only indicate a kind of scan type, and can not indicate multiple scan type simultaneously, the value and the corresponding relation between the scan type in this association type territory are as shown in table 1.
| Related scan type (association type) territory | Scan type |
| 000 | Simple scanning |
| 001 | The association scanning of level0 |
| 010 | The association scanning of level1 |
| 011 | The association scanning of level2 |
Table 1
In actual applications, MSS often needs the more neighbor bss of number of scans, and also is not quite similar at the scan type of each neighbor bss.Such as: need carry out the association scanning of level1 or level2 to those better quality of signal BS, bad BS then only need carry out the association scanning of simple scanning or level0 to those signal qualitys.
But, a scan request once can only be indicated a kind of scan type, if the corresponding more than one scan type of current each neighbor bss that will scan, MSS will send more than one scan request, and each scan request is carried the neighbor bss information of a kind of scan type and this scan type correspondence.These scan request will have a large amount of identical contents, as: type of message, sweep time, sweep spacing or the like, and in order to guarantee fail safe, each scan request all will be added the cryptographic digest that a segment length reaches 168 bits; Accordingly, serving BS broadcasts also will be returned more than one scanning and respond to MSS, and these scanning responses also will have a large amount of identical contents, and each scanning responds the also additional described cryptographic digest that has.Between these scan request or between the scanning response a large amount of identical contents repeat send and the additional cryptographic digest of each scan request or scanning response back all will take a large amount of interface-free resources.
As seen, existing request scan method and the interface-free resources of utilizing not yet in effect are handled, and will cause the serious waste of valuable interface-free resources under some situation, thereby influence eats dishes without rice or wine to go up the normal transmission of business datum.
Summary of the invention
In view of this, main purpose of the present invention is to provide in a kind of wireless broadband access system asks method for scanning, the utilization rate of air interface resource in the time of can improving request scanning.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention discloses in a kind of wireless broadband access system and ask method for scanning, be used to comprise the wireless broadband access system of MSS and BS, this method comprises: MSS determines each neighbor bss and each self-corresponding scan type thereof of current request scanning; This method also comprises:
A. described MSS sends scan request to serving BS broadcasts, and this scan request is carried each neighbor bss information and each self-corresponding scan type thereof of current request scanning;
B. described serving BS broadcasts is obtained each neighbor bss information of current request and each self-corresponding scan type thereof according to the scan request that receives.
In the steps A, entrained each neighbor bss information and each self-corresponding scan type thereof are: the neighbor bss information of each scan type and each scan type correspondence.
Wherein, the method that the described scan request of steps A is carried each scan type is: the more than one bit that preestablishes the various scan types that are used to write down current request, the corresponding a kind of scan type of each bit, with the bit position of the various scan type correspondences of current request is effectively, and other bit position is invalid.
Wherein, described scan request is by motion scan request (MOB_SCN-REQ) message bearing; The described more than one bit that is used for writing down various scan types is four bits of MOB_SCN-REQ message reserved field.
In the steps A, entrained each neighbor bss information and each self-corresponding scan type thereof are: the scan type of each neighbor bss information and each neighbor bss information correspondence.
Wherein, the described scan request of steps A is carried the method for the scan type of each neighbor bss information correspondence and is: the scan type that writes down this neighbor bss correspondence at each neighbor bss with more than one bit; The described method of obtaining the scan type of each neighbor bss information correspondence of step B is: the bit that is used for the writing scan type that reads each neighbor bss information correspondence successively.
Wherein, described scan request is by the MOB_SCN-REQ message bearing; Described more than one bit two or three bits in MOB_SCN-REQ message, being provided with.
Wherein, this method further comprises:
C. described serving BS broadcasts is determined each neighbor bss information and each self-corresponding scan type thereof of current scanning according to each neighbor bss information and each self-corresponding scan type and the scanning tenability of self that step B gets access to;
D. described serving BS broadcasts is returned the scanning response and is given described MSS, and each neighbor bss information and each self-corresponding scan type thereof of the definite current scanning of step C carried in this scanning response;
E. described MSS obtains each neighbor bss information and each self-corresponding scan type thereof of current scanning according to the scanning response that receives.
Among the step D, entrained each neighbor bss information and each self-corresponding scan type thereof are: the neighbor bss information of each scan type and each scan type correspondence.
Wherein, the method that various scan types are carried in the described scanning of step D response is: the more than one bit that preestablishes the various scan types that are used to write down current scanning, the corresponding a kind of scan type of each bit, with the bit position of the various scan type correspondences of current scanning is effectively, and other bit position is invalid.
Wherein, described scanning response is replied (MOB_SCN-RSP) message bearing by motion scan; The described more than one bit that is used for writing down various scan types is four bits of MOB_SCN-RSP message reserved field.
Among the step D, entrained each neighbor bss information and each self-corresponding scan type thereof are: the scan type of each neighbor bss information and each neighbor bss information correspondence.
Wherein, the described scanning of step D response is carried the method for the scan type of each neighbor bss information correspondence and is: the corresponding more than one bit of each neighbor bss information writes down the scan type of this neighbor bss correspondence; The described method of obtaining the scan type of each neighbor bss information correspondence of step e is: the bit that is used for the writing scan type that reads each neighbor bss information correspondence successively.
Wherein, described scanning response is by the MOB_SCN-RSP message bearing; Described more than one bit two or three bits that are used for the writing scan type for being provided with in MOB_SCN-REQ message.
Wherein, the method that the neighbor bss information of each scan type correspondence is carried in described scan request or described scanning response is: the neighbor bss information of pressing predefined procedure record different scanning type correspondence, and the neighbor bss information of the same scan type correspondence of recording occurring continuously, write down the quantity of the neighbor bss of each scan type correspondence simultaneously; The described method of obtaining the neighbor bss information of each scan type correspondence in described scan request or the described scanning response is: by the quantity of the neighbor bss of described predefined procedure and each scan type correspondence of being write down, read the neighbor bss information of each scan type correspondence successively.
Wherein, entrained various scan types are: the related combination in any that scans this of the association scanning of simple scanning, rank 0, the association scanning of rank 1 and rank 2.
Wherein, the described neighbor bss information sign that is neighbor bss.
Wherein, described wireless broadband access system is the WiMAX system.
By such scheme as can be seen, key of the present invention is: MSS carries neighbor bss information and each self-corresponding scan type thereof of current request scanning simultaneously in a scan request, and serving BS broadcasts is obtained neighbor bss information and each self-corresponding scan type thereof of current request scanning from the scan request that receives.
Therefore, ask method for scanning in the wireless broadband access system provided by the present invention, can reduce the quantity forwarded of scan request or scanning response in a large number, avoid identical content between scan request or the scanning response repeat send, reduce the traffic volume that is attached to scan request or scanning response cryptographic digest afterwards, the interface-free resources that the request scanning process is taken significantly reduces, and improves the resource utilization of request scanning, effectively improves the performance of wireless broadband access systems such as WiMAX.
Description of drawings
Fig. 1 is the inventive method one preferred embodiment handling process schematic diagram;
Fig. 2 is scan request one example schematic in the inventive method;
Fig. 3 is another preferred embodiment handling process schematic diagram of the inventive method.
Embodiment
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
The invention provides in a kind of wireless broadband access system and ask method for scanning, its main design philosophy is: after MSS determines the neighbor bss and corresponding scan type thereof of current request scanning, scan request of unified transmission is to serving BS broadcasts, and this scan request is carried each neighbor bss information and each self-corresponding scan type thereof of current request scanning.Here, described wireless broadband access system mainly refers to the WiMAX system.
Each neighbor bss information and each self-corresponding scan type thereof of wherein, carrying in the scan request have two kinds of expression modes: one, the neighbor bss information of each scan type and each scan type correspondence; Two, the scan type of each neighbor bss information and each neighbor bss information correspondence.When adopting this dual mode to represent each neighbor bss information and each self-corresponding scan type thereof, the processing of the inventive method is different, therefore, below the embodiment that adopts this dual mode is illustrated respectively.
Fig. 1 is the inventive method one preferred embodiment handling process schematic diagram.In the present embodiment, described each neighbor bss information and each self-corresponding scan type thereof are expressed as: the neighbor bss information of each scan type and each scan type correspondence.As shown in Figure 1, the concrete processing comprises:
When step 101:MSS prepares scanning, at first determine each neighbor bss information and each self-corresponding scan type thereof of current request scanning.
In the prior art, MSS also will carry out this step process when preparing scanning, therefore how to determine the method for scan type and neighbor bss about MSS, belongs to known technology, and this paper is not further described this.
Step 102:MSS is scan request of the unified structure of the various scan types of current request scanning, and this scan request is carried the various scan types of current request and the neighbor bss information of each scan type correspondence.
Wherein, can set the various scan types that some bits write down current request in scan request, the corresponding a kind of scan type of each bit be effective with each bit position of each scan type correspondence of current request, and is invalid with other bit position.Here, can set 1 and be the effective value of bit, and 0 is the invalid value of bit.According to background technology, there are four kinds at the scan type of serving BS broadcasts: the association scanning of simple scanning, level0, the association scanning of level1 and the related scanning of level2.So can set each scan type that four bits write down current request.The present invention does not limit scan type and specifically comprises which kind and specifically come the beacon scanning type with several bits.
Therefore scan request of the present invention can be carried by MOB_SCN-REQ message, can utilize four bits in the MOB_SCN-REQ message reserved field to write down each scan type of current request.Present embodiment is set: be used for four bits of writing scan type, the association scanning of the association scanning of corresponding successively from low to high simple scanning, level0, the association scanning of level1, level2.Therefore, shown in the mapping table 2 between each scan type of the value of this four bit and current request.Here, the present invention does not limit respectively corresponding which kind of scan type of each bit in this four bit.
| Four bits that are used for the writing scan type | Scan type |
| 0001 | Simple scanning |
| 0010 | The association scanning of level0 |
| 0011 | The related scanning of simple scanning and level0 |
| 0100 | The association scanning of level1 |
| 0101 | The related scanning of simple scanning and level1 |
| 0110 | The association scanning of level1 and the related scanning of level2 |
| 0111 | The association scanning of simple scanning, level1 and the related scanning of level2 |
| 1000 | The association scanning of level2 |
| 1001 | The related scanning of simple scanning and level2 |
| 1010 | The association scanning of level0 and the related scanning of level2 |
| 1011 | The association scanning of simple scanning, level0 and the related scanning of level2 |
| 1100 | The association scanning of level1 and the related scanning of level2 |
| 1101 | The association scanning of simple scanning, level1 and the related scanning of level2 |
| 1110 | The association scanning of level0, the association scanning of level1 and the related scanning of level2 |
| 1111 | The association scanning of the association scanning of simple scanning, level0, the association scanning of level1, level2 |
Table 2
The scan request of step 103:MSS forwarding step 102 structures is to serving BS broadcasts.Serving BS broadcasts is obtained the various scan types of current request and the neighbor bss information of each scan type correspondence according to the scan request that receives.Here, the information of described neighbor bss is often referred to the sign of neighbor bss.
Wherein, the described scan request of step 102 carry each scan type correspondence neighbor bss information method can for: by the sign of the neighbor bss of predetermined scan type journal different scanning type correspondence, and the sign of the neighbor bss of the same scan type correspondence of recording occurring continuously writes down the quantity of the neighbor bss of each scan type correspondence simultaneously.Like this, in the step 103, serving BS broadcasts obtain each scan type correspondence neighbor bss information method just can for: by the quantity of the neighbor bss of described predetermined scan type order and each scan type correspondence, read the sign of the neighbor bss of each scan type correspondence successively.For ease of understanding the described processing of this section, be that example is carried out simple declaration below with Fig. 2.
Fig. 2 is scan request one example schematic among the present invention.Fig. 2 only illustrates the field of the neighbor bss sign of the neighbor bss quantity of carrying various scan types, each scan type correspondence in the scan request related to the present invention and each scan type correspondence, and other field is also not shown and represent with ellipsis.
Wherein, the bit value that is used for four bits of writing scan type is 1101, illustrates that the scan type of current request comprises: the association scanning of simple scanning, level1, the association scanning of level2.The quantity of the neighbor bss of each scan type correspondence is respectively: the quantity of simple scanning correspondence is 2, and the corresponding quantity of the association of level1 scanning is 3, the corresponding quantity of association scanning of level2 is 1.If preestablish the order that scan type from left to right arranges be: the association scanning of simple scanning, level1, the association scanning of level2, then the record result of the neighbor bss of each scan type correspondence sign as shown in Figure 2.Among Fig. 2, the neighbor bss of simple scanning correspondence sign has two, is expressed as: BS1l and BS12, and recording occurring continuously is at Far Left; The corresponding neighbor bss sign of the association scanning of level1 has three, is expressed as: BS21, BS22 and BS23, and recording occurring continuously is in the back of BS11 and BS12; The only corresponding neighbor bss sign of the association scanning of level2 is expressed as BS31, and this BS31 is recorded in rightmost.
After serving BS broadcasts receives scan request shown in Figure 2, according to described four bits that are used for the writing scan type of epimere indication as can be known the scan type of current request comprise: the association scanning of simple scanning, levell and the related scanning of level2; And, can learn the quantity of the neighbor bss of each scan type correspondence: corresponding three neighbor bss of association scanning of corresponding two neighbor bss of simple scanning, level1, corresponding neighbor bss of association scanning of level2.Then, serving BS broadcasts puts in order and the quantity of the neighbor bss of each scan type correspondence by described scan type, and at first reading two neighbor bss signs from Far Left is BS11 and BS12, with BS11 and the BS12 neighbor bss sign as the simple scanning correspondence; Then reading three neighbor bss signs then is BS21, BS22 and BS23, and BS21, BS22 are identified as the corresponding neighbor bss of the related scanning of level1 with BS23; Read rightmost neighbor bss sign BS31 at last, BS31 is identified as the corresponding neighbor bss of the association scanning of level2.
Here, the present invention only limits the neighbor bss sign of same scan type correspondence and wants recording occurring continuously, and putting in order between the neighbor bss sign of same scan type correspondence do not limit.In addition, described scan type order is pre-configured among BS and the MSS by the regulation of unified standard usually, like this, could guarantee the interoperability of each BS and MSS.
Get access to the neighbor bss sign of the various scan types of MSS current request and each scan type correspondence when serving BS broadcasts after, just can determine whether provides miscellaneous function and which kind of other miscellaneous function of level is provided for current scanning, thereby finish the scan request process, begin to prepare scanning.
But, consider that the scan type that MSS asks may serving BS broadcasts not support, perhaps serving BS broadcasts is not supported the scan type of MSS request at indivedual neighbor bss, then can also further carry out following processing after above-mentioned steps 103:
Step 104: the various scan types of the current request that serving BS broadcasts is obtained according to step 103 and the neighbor bss information of each scan type correspondence and the scanning tenability of self, determine the various scan types of current scanning and the neighbor bss information of each scan type correspondence.
Owing to also there is a kind of like this mechanism in the prior art: serving BS broadcasts is determined the scan type and the corresponding neighbor bss information thereof of current scanning according to the scan type of MSS request and corresponding neighbor bss information and self scanning tenability thereof.Therefore, the described serving BS broadcasts of this step is determined the neighbor bss information processing of various scan types and each scan type correspondence of current scanning, can adopt prior art to realize that this paper is not described in further detail this.
Step 105: serving BS broadcasts is given MSS for a scanning of the unified structure of the various scan types response concurrent of self definite current scanning, and the various scan types of current scanning and the neighbor bss information of each scan type correspondence are carried in this scanning response.MSS is according to the scanning response that receives, obtain the various scan types of current scanning and the neighbor bss information of each scan type correspondence, prepare to begin scanning by the various scan types of the current scanning that gets access to and the neighbor bss information of each scan type correspondence.
Described scanning response can be carried by MOB_SCN-RSP message, therefore can utilize four bits in the MOB_SCN-RSP message reserved field to write down each scan type of current request.With the described MOB_SCN-REQ classes of messages of step 102 seemingly, present embodiment is set: be used for four bits of writing scan type, the association scanning of the association scanning of corresponding successively from high to low simple scanning, level0, the association scanning of level1, level2.
In addition, carry the method that method and the described scan request of step 102 of the neighbor bss information of each scan type correspondence carry the corresponding neighbor bss information of each scan type about scanning response identical, be similarly: the sign of pressing the neighbor bss of predetermined scan type journal different scanning type correspondence, and the neighbor bss of the same scan type correspondence of recording occurring continuously identifies, and writes down the quantity of the neighbor bss of each scan type correspondence simultaneously.Like this, MSS obtains the method for neighbor bss information of each scan type correspondence of current request, and also to obtain the method for the corresponding neighbor bss information of each scan type of current scanning identical with the described serving BS broadcasts of step 103, be similarly:, read the neighbor bss information of each scan type correspondence successively by the quantity of the neighbor bss of described predetermined scan type order and each scan type correspondence.Because the processing of step 105 and the processing of step 102 and step 103 are similar, so this paper just no longer further illustrates the processing of step 105.
Fig. 3 is another preferred embodiment handling process schematic diagram of the inventive method.In the present embodiment, described each neighbor bss information and each self-corresponding scan type thereof are expressed as: the scan type of each neighbor bss information and each neighbor bss information correspondence.As shown in Figure 3, the concrete processing comprises:
When step 301:MSS prepares scanning, at first determine each neighbor bss information and each self-corresponding scan type thereof of current request scanning.
Step 302:MSS is scan request of the unified structure of each neighbor bss of current request scanning, and this scan request is carried each neighbor bss information of current request scanning and the scan type of each neighbor bss information correspondence.
Wherein, can in scan request, write down each neighbor bss information, and the scan type that some bits write down this neighbor bss correspondence is set for each neighbor bss.Should can be three bits for bit that is used for the writing scan type of each neighbor bss setting, and the method for expressing that can continue to use three bits of existing associationtype is represented various scan types.In view of the current scanline type has only four kinds,, should also can be two bits for the bit that is used for the writing scan type of each neighbor bss setting in order to save the resource that scan request takies.The present invention does not limit and is specially each neighbor bss and comes the writing scan type with several bits are set.Here, described scan request can be carried by MOB_SCN-REQ message.
The scan request of step 303:MSS forwarding step 302 structures is to serving BS broadcasts.Serving BS broadcasts is obtained each neighbor bss information of current request scanning and the scan type of each neighbor bss information correspondence according to the scan request that receives.Here, the information of described neighbor bss is often referred to the sign of neighbor bss, and serving BS broadcasts is by reading each neighbor bss sign and the corresponding bit that is used for the writing scan type thereof in the scan request, each neighbor bss and corresponding scan type thereof as can be known.
Get access to the scan type of each neighbor bss information of MSS current request scanning and each neighbor bss information correspondence when serving BS broadcasts after, just can determine whether provides miscellaneous function and which kind of other miscellaneous function of level is provided for current scanning, thereby finish the scan request process, begin to prepare scanning.
But, consider that the scan type that MSS asks may serving BS broadcasts not support, perhaps serving BS broadcasts is not supported the scan type of MSS request at indivedual neighbor bss, then can also further carry out following processing after above-mentioned steps 303:
Step 304: each neighbor bss information and the scan type of each neighbor bss information correspondence and the scanning tenability of self that the current request that serving BS broadcasts is obtained according to step 303 scans, determine each neighbor bss information of current scanning and the scan type of each neighbor bss information correspondence.
Owing to also there is a kind of like this mechanism in the prior art: serving BS broadcasts is determined the scan type and the neighbor bss information of current scanning according to scan type, neighbor bss information and self scanning tenability of MSS request.Therefore, the described serving BS broadcasts of this step is determined the processing of the scan type of each neighbor bss information of current scanning and each neighbor bss information correspondence, can adopt prior art to realize that this paper is not described in further detail this.
Step 305: serving BS broadcasts is given MSS for a scanning of the unified structure of each neighbor bss response concurrent of self definite current scanning, and each neighbor bss information of current scanning and the scan type of each neighbor bss information correspondence are carried in this scanning response.MSS is according to the scanning response that receives, obtain each neighbor bss information of current scanning and the scan type of each neighbor bss information correspondence, prepare to begin scanning by each neighbor bss information of the current scanning that gets access to and the scan type of each neighbor bss information correspondence.
Wherein, can be in scanning response each neighbor bss information of record, and the scan type that some bits write down this neighbor bss correspondence is set for each neighbor bss.Should can be three bits for bit that is used for the writing scan type of each neighbor bss setting, and the method for expressing that can continue to use three bits of existing associationtype is represented various scan types.In view of the current scanline type has only four kinds,, should also can be two bits for the bit that is used for the writing scan type of each neighbor bss setting in order to save the resource that the scanning response takies.The present invention does not limit and is specially each neighbor bss and comes the writing scan type with several bits are set.Here, described scanning response can be carried by MOB_SCN-RSP message.
In sum, after employing the inventive method, MSS can be all neighbor bss and scan request of the unified transmission of each self-corresponding scan type thereof of current request scanning.And prior art MSS sends a scan request for each scan type, a large amount of identical contents will be arranged in each scan request, and each scan request all will be added a cryptographic digest.Like this, with respect to prior art, the inventive method can avoid identical content between the scan request of each scan type repeat send, and MSS only needs that additional cryptographic digest get final product in the unified scan request that sends.In addition, the present invention is similar with above-mentioned processing to scan request for the processing of scanning response, can reduce equally respectively scan respond between the transmission that repeats to send, reduce cryptographic digest of identical content.
As seen, use the present invention and can significantly reduce scan request and scan the interface-free resources that response takies, thereby, effectively utilize valuable interface-free resources to finish the request scanning process, improve the WiMAX systematic function on the whole.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.All any modifications of being done within the spirit and principles in the present invention, be equal to replacement, improvement etc., all be included in protection scope of the present invention.
Claims (19)
1, ask method for scanning in a kind of wireless broadband access system, be used to comprise the wireless broadband access system of mobile station MS S and base station BS, this method comprises: MSS determines each neighbor bss and each self-corresponding scan type thereof of current request scanning; It is characterized in that this method also comprises:
A. described MSS sends scan request to serving BS broadcasts, and this scan request is carried each neighbor bss information and each self-corresponding scan type thereof of current request scanning;
B. described serving BS broadcasts is obtained each neighbor bss information of current request and each self-corresponding scan type thereof according to the scan request that receives.
2, method according to claim 1 is characterized in that, in the steps A, entrained each neighbor bss information and each self-corresponding scan type thereof are: the neighbor bss information of each scan type and each scan type correspondence.
3, method according to claim 2, it is characterized in that, the method that the described scan request of steps A is carried each scan type is: the more than one bit that preestablishes the various scan types that are used to write down current request, the corresponding a kind of scan type of each bit, with the bit position of the various scan type correspondences of current request is effectively, and other bit position is invalid.
4, method according to claim 3 is characterized in that, described scan request is by motion scan request MOB_SCN-REQ message bearing; The described more than one bit that is used for writing down various scan types is four bits of MOB_SCN-REQ message reserved field.
5, method according to claim 1 is characterized in that, in the steps A, entrained each neighbor bss information and each self-corresponding scan type thereof are: the scan type of each neighbor bss information and each neighbor bss information correspondence.
6, method according to claim 5 is characterized in that, the method that the described scan request of steps A is carried the scan type of each neighbor bss information correspondence is: the scan type that writes down this neighbor bss correspondence at each neighbor bss with more than one bit;
The described method of obtaining the scan type of each neighbor bss information correspondence of step B is: the bit that is used for the writing scan type that reads each neighbor bss information correspondence successively.
7, method according to claim 6 is characterized in that, described scan request is by the MOB_SCN-REQ message bearing; Described more than one bit two or three bits in MOB_SCN-REQ message, being provided with.
8, method according to claim 1 is characterized in that, this method further comprises:
C. described serving BS broadcasts is determined each neighbor bss information and each self-corresponding scan type thereof of current scanning according to each neighbor bss information and each self-corresponding scan type and the scanning tenability of self that step B gets access to;
D. described serving BS broadcasts is returned the scanning response and is given described MSS, and each neighbor bss information and each self-corresponding scan type thereof of the definite current scanning of step C carried in this scanning response;
E. described MSS obtains each neighbor bss information and each self-corresponding scan type thereof of current scanning according to the scanning response that receives.
9, method according to claim 8 is characterized in that, among the step D, entrained each neighbor bss information and each self-corresponding scan type thereof are: the neighbor bss information of each scan type and each scan type correspondence.
10, method according to claim 9, it is characterized in that, the method that various scan types are carried in the described scanning of step D response is: the more than one bit that preestablishes the various scan types that are used to write down current scanning, the corresponding a kind of scan type of each bit, with the bit position of the various scan type correspondences of current scanning is effectively, and other bit position is invalid.
11, method according to claim 10 is characterized in that, described scanning response is replied the MOB_SCN-RSP message bearing by motion scan; The described more than one bit that is used for writing down various scan types is four bits of MOB_SCN-RSP message reserved field.
12, method according to claim 8 is characterized in that, among the step D, entrained each neighbor bss information and each self-corresponding scan type thereof are: the scan type of each neighbor bss information and each neighbor bss information correspondence.
13, method according to claim 12, it is characterized in that the method that the scan type of each neighbor bss information correspondence is carried in the described scanning response of step D is: the corresponding more than one bit of each neighbor bss information writes down the scan type of this neighbor bss correspondence;
The described method of obtaining the scan type of each neighbor bss information correspondence of step e is: the bit that is used for the writing scan type that reads each neighbor bss information correspondence successively.
14, method according to claim 13 is characterized in that, described scanning response is by the MOB_SCN-RSP message bearing; Described more than one bit two or three bits that are used for the writing scan type for being provided with in MOB_SCN-REQ message.
15, according to claim 2,3,4,9,10 or 11 described methods, it is characterized in that, the method that described scan request is carried the neighbor bss information of each scan type correspondence is: the neighbor bss information of pressing predefined procedure record different scanning type correspondence, and the neighbor bss information of the same scan type correspondence of recording occurring continuously, write down the quantity of the neighbor bss of each scan type correspondence simultaneously;
The described method of obtaining the neighbor bss information of each scan type correspondence in the described scan request is: by the quantity of the neighbor bss of described predefined procedure and each scan type correspondence of being write down, read the neighbor bss information of each scan type correspondence successively.
16, according to claim 9,10 or 11 described methods, it is characterized in that, the method that the neighbor bss information of each scan type correspondence is carried in described scanning response is: the neighbor bss information of pressing predefined procedure record different scanning type correspondence, and the neighbor bss information of the same scan type correspondence of recording occurring continuously, write down the quantity of the neighbor bss of each scan type correspondence simultaneously;
The described method of obtaining the neighbor bss information of each scan type correspondence in the described scanning response is: by the quantity of the neighbor bss of described predefined procedure and each scan type correspondence of being write down, read the neighbor bss information of each scan type correspondence successively.
According to each described method of claim 1 to 14, it is characterized in that 17, entrained various scan types are: the related combination in any that scans this of the association scanning of simple scanning, rank 0, the association scanning of rank 1 and rank 2.
According to each described method of claim 1 to 14, it is characterized in that 18, described neighbor bss information is the sign of neighbor bss.
According to each described method of claim 1 to 14, it is characterized in that 19, described wireless broadband access system is a World Interoperability for Microwave Access, WiMax technology WiMAX system.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100890220A CN100488138C (en) | 2005-06-27 | 2005-08-03 | Method of inquiring scanning in radio broadband access system |
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| CN200510079977 | 2005-06-27 | ||
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| CNB2005100890220A CN100488138C (en) | 2005-06-27 | 2005-08-03 | Method of inquiring scanning in radio broadband access system |
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| CNA2007101814863A Division CN101222762A (en) | 2005-08-03 | 2005-08-03 | Base station, mobile station and scanning requesting method of wireless broadband access system |
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| CN100488138C true CN100488138C (en) | 2009-05-13 |
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| CN101442783B (en) * | 2007-11-23 | 2011-11-23 | 华为技术有限公司 | Method, apparatus and system for reporting scanning result |
| CN101790197B (en) * | 2009-01-22 | 2015-09-16 | 中兴通讯股份有限公司 | Based on the scan request sending method of multicarrier system |
| CN101790198A (en) * | 2009-01-22 | 2010-07-28 | 中兴通讯股份有限公司 | Scan response sending method based on multi-carrier system and base station |
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