CN104066148A - Service discovery method, access point and station point - Google Patents

Service discovery method, access point and station point Download PDF

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Publication number
CN104066148A
CN104066148A CN201310088350.3A CN201310088350A CN104066148A CN 104066148 A CN104066148 A CN 104066148A CN 201310088350 A CN201310088350 A CN 201310088350A CN 104066148 A CN104066148 A CN 104066148A
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China
Prior art keywords
information
services
broadcast frame
group
airtime
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Granted
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CN201310088350.3A
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Chinese (zh)
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CN104066148B (en
Inventor
陶源
杨浔
姜艳平
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Ruide Yinfang (Nantong) Information Technology Co., Ltd
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Huawei Technologies Co Ltd
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Priority to CN201310088350.3A priority Critical patent/CN104066148B/en
Priority to PCT/CN2013/087219 priority patent/WO2014146440A1/en
Publication of CN104066148A publication Critical patent/CN104066148A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/189—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast in combination with wireless systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/51—Discovery or management thereof, e.g. service location protocol [SLP] or web services
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention relates to a service discovery method, an access point and a station point. The method comprises that all service information is classified according to contents of all the service information so that different service information groups are obtained; broadcasting time of each service information group is confirmed, and a service catalog is established according to broadcasting time and information identification of the service information groups; the service information groups and the service catalog are added to broadcasting frames; a broadcast period of the broadcasting frames is confirmed, and the broadcasting frames are periodically sent to the station point so that broadcasting time of the service information groups, in which the service information required by the station point is positioned, is discovered from the service information groups of the broadcasting frames by the station point or is acquired from the service catalog of the broadcasting frames by the station point. Therefore, the AP is utilized to classify all the service information which is then sent to the STA, and the STA receives the required service information at the informed time without receiving all the service information so that power consumption of the STA is reduced, and passive service discovery of large data volume can be supported.

Description

Service discovery method, access point and website
Technical field
The present invention relates to communication technical field, relate in particular to a kind of service discovery method, access point and website.
Background technology
Development along with the communication technology, WLAN (wireless local area network) (Wireless Local Area Network, what WLAN) conventionally adopt is based on access point (Access Point, AP) service discovery, be website (station, STA) after need to first associatedly with AP setting up communication link, just know which service AP can provide.
At present, the mode of service discovery can be divided into two kinds: active service discovery and passive service are found.Initiatively the mode of lookup service refers to that STA initiatively sends service request to service equipment, if service equipment can provide STA required service, replys service response to STA.The mode of passively discover service refers to that STA waits for and receive service equipment broadcast service information, therefrom finds own required information on services.
Wherein, the flow process that passive service is found is: AP is put into information on services in broadcast frame and broadcasts, such as, by beacon (Beacon), broadcasting, STA, by receiving broadcast frame, therefrom finds the information on services of wanting.
But in some scene, COS is a lot, data volume is very large.If AP is included in broadcast in a beacon (Beacon) by all information on services, will cause channel seizure ratio very high in some time periods, suppose that a more than AP is in broadcast message simultaneously, probably cause the collision of information, once collision occurs, all information on services will be lost, next beacon (Beacon) can only be waited for.For STA, need always in listening state, receive the details of all types service in broadcast frame, and in fact wherein major part not that it is needed, and cause the power consumption of STA side very high.
Summary of the invention
The invention provides a kind of service discovery method, access point and website, to solve in prior art in the very large scene of a lot of data volumes of COS, AP is put into all information on services in a beacon and broadcasts, and STA needs always in listening state, and receive a large amount of unwanted information, thereby the very high problem of power consumption that causes STA side, utilize AP after all information on services classification, to send to STA, and STA receives the information on services needing in the moment of knowing, and do not need to receive all information on services, reduced the power consumption of STA, can support the passive service of big data quantity to find.
In first aspect, the invention provides a kind of service discovery method, described method comprises: access point is classified and obtained different information on services groups according to the content of each information on services, each information on services group has a message identification, and the content of the information on services in each information on services group belongs to the COS corresponding with described message identification; Described access point is determined the airtime of described each information on services group, and sets up service catalogue according to the airtime of described information on services group and message identification, and described service catalogue comprises airtime and the message identification of all information on services groups; Described access point adds described information on services group and described service catalogue in broadcast frame to; Described access point is determined the broadcast cycle of described broadcast frame, and periodically to website, send described broadcast frame according to described broadcast cycle, in order to described website, from the information on services group of described broadcast frame, find the information on services that self is required or from the service catalogue of described broadcast frame, know airtime of the information on services group at described self required information on services place.
In the possible implementation of the first, described service catalogue also comprises the summary info of the information on services in described each information on services group, described described information on services group and described service catalogue are added in broadcast frame, comprise: described information on services group is added to respectively in each broadcast frame, and described service catalogue is added to respectively in described each broadcast frame, the information on services group that described each broadcast frame is carried is neither same, and the described service catalogue that described each broadcast frame carries is all identical, wherein, each broadcast frame carries the information on services group of service catalogue and a type.
In the possible implementation of the second, the described airtime of determining described each information on services group, and set up service catalogue according to the airtime of described information on services group and message identification, also comprise: the airtime of determining described service catalogue according to the airtime of described each information on services group.
In conjunction with the possible implementation of the second of first aspect, in the third possible implementation, described broadcast frame comprises: the first broadcast frame and the second broadcast frame; Described described information on services group and described service catalogue are added in broadcast frame, comprise: described service catalogue is added in the first broadcast frame, and the airtime of described service catalogue and described information on services group are added in the second different broadcast frames, and the information on services group that each second broadcast frame is carried is neither identical.
In second aspect, the invention provides a kind of service discovery method, described method comprises: website receives the broadcast frame that carries service catalogue and information on services group that access point sends, and described service catalogue comprises the message identification of information on services and the airtime of information on services group; From the information on services group of described broadcast frame, find the information on services that self is required or from the service catalogue of described broadcast frame, know airtime of the information on services group at described self required information on services place.
In the possible implementation of the first, the described airtime of finding the information on services that self is required or know the information on services group at described self required information on services place from the information on services group of described broadcast frame from the service catalogue of described broadcast frame, comprise: while comprising described self required information on services in the described information on services group of the described broadcast frame receiving, described website stops receiving described access point sends other broadcast frame; While not comprising described self required information on services in the described information on services group of the described broadcast frame receiving, described website was known after airtime of information on services group at described self required information on services place from described service catalogue, enter resting state, airtime in the information on services group at described self required information on services place enters accepting state, finds described self required information on services from the broadcast frame receiving.
In the possible implementation of the second, the described airtime of finding the information on services that self is required or know the information on services group at described self required information on services place from the information on services group of described broadcast frame from the service catalogue of described broadcast frame, comprise: while comprising described self required information on services in the described information on services group of the described broadcast frame receiving, other the information on services that described website no longer receives that described access point sends, other broadcast frames that send for described access point are made discard processing; In the described information on services group of the described broadcast frame receiving, do not comprise described self required information on services, and in described service catalogue, there is the message identification of described information on services and the airtime of information on services group corresponding with described self required information on services, in the airtime of described information on services group, receive broadcast frame, and from the described broadcast frame receiving, find described self required information on services, other broadcast frames that send for described access point are made discard processing; In the described information on services group of the described broadcast frame receiving, do not comprise described self required information on services, and in described service catalogue, there is not the message identification of described information on services and the airtime of information on services group corresponding with described self required information on services, described website no longer receives the information on services that described access point sends, and other broadcast frames that send for described access point are made discard processing.
In the third possible implementation, described broadcast frame comprises the first broadcast frame and the second broadcast frame, described website receives the broadcast frame that carries information on services group and service catalogue that access point sends, comprise: the first broadcast frame that carries service catalogue and the reception that receive described access point transmission carry the airtime of described service catalogue and the second broadcast frame of described information on services group, wherein, the information on services group that each second broadcast frame carries is neither identical.
In the third aspect, the invention provides a kind of access point, described access point comprises: taxon, for classifying according to the content of each information on services, obtain different information on services groups, each information on services group has the summary info of each information on services of message identification, and the content of the information on services in each information on services group belongs to the COS corresponding with described message identification, and described information on services group is transferred to processing unit; Processing unit, for receiving described information on services group from described taxon, determine the airtime of described each information on services group, and set up service catalogue according to the airtime of described information on services group and message identification, described service catalogue comprises airtime and the message identification of all information on services groups, and described information on services group and described service catalogue are transferred to adding device; Adding device, for receive described information on services group and described service catalogue from described processing unit, adds described information on services group and described service catalogue in broadcast frame to, and described broadcast frame is transferred to transmitting element; Transmitting element, for receiving described broadcast frame from adding device, determine the broadcast cycle of described broadcast frame, and periodically to website, send described broadcast frame according to described broadcast cycle, in order to described website, from the information on services group of described broadcast frame, find the information on services that self is required or from the service catalogue of described broadcast frame, know airtime of the information on services group at described self required information on services place.
In the possible implementation of the first, described service catalogue also comprises the summary info of the information on services in described each information on services group, described adding device is for adding respectively described information on services group to each broadcast frame, and described service catalogue is added to respectively in described each broadcast frame, the information on services group that described each broadcast frame is carried is neither same, and the described service catalogue that described each broadcast frame carries is all identical, wherein, each broadcast frame carries the information on services group of service catalogue and a type.
In the possible implementation of the second, described service catalogue also comprises the summary info of the information on services in described each information on services group, and described processing unit is also for determining the airtime of described service catalogue according to the airtime of described each information on services group.
In conjunction with the possible implementation of the second of the third aspect, in the third possible implementation, described broadcast frame comprises: the first broadcast frame and the second broadcast frame; Described adding device is for adding described service catalogue to first broadcast frame, and the airtime of described service catalogue and described information on services group are added in the second different broadcast frames, and the information on services group that each second broadcast frame is carried is neither identical.
In fourth aspect, the invention provides a kind of website, described website comprises: receiving element, the broadcast frame that carries service catalogue and information on services group sending for receiving access point, described service catalogue comprises the message identification of information on services and the airtime of information on services group, and described broadcast frame is transferred to discovery unit; Find unit, for receiving described broadcast frame from described receiving element, from the information on services group of described broadcast frame, find the information on services that self is required or from the service catalogue of described broadcast frame, know airtime of the information on services group at described self required information on services place.
In the possible implementation of the first, described discovery unit is when comprising described self required information on services when the described information on services group of the described broadcast frame receiving, and described website stops receiving other broadcast frame of described access point transmission; While not comprising described self required information on services in the described information on services group of the described broadcast frame receiving, described website was known after airtime of information on services group at described self required information on services place from described service catalogue, enter resting state, airtime in the information on services group at described self required information on services place enters accepting state, finds described self required information on services from the broadcast frame receiving.
In the possible implementation of the second, described discovery unit is for when described in the described information on services group of the described broadcast frame receiving comprises during self required information on services, other the information on services that described website no longer receives that described access point sends, other broadcast frames that send for described access point are made discard processing; In the described information on services group of the described broadcast frame receiving, do not comprise described self required information on services, and in described service catalogue, there is the message identification of described information on services and the airtime of information on services group corresponding with described self required information on services, in the airtime of described information on services group, receive broadcast frame, and from the described broadcast frame receiving, find described self required information on services, other broadcast frames that send for described access point are made discard processing; In the described information on services group of the described broadcast frame receiving, do not comprise described self required information on services, and in described service catalogue, there is not the message identification of described information on services and the airtime of information on services group corresponding with described self required information on services, described website no longer receives the information on services that described access point sends, and other broadcast frames that send for described access point are made discard processing.
In the third possible implementation, described broadcast frame comprises the first broadcast frame and the second broadcast frame, described receiving element carries the airtime of described service catalogue and the second broadcast frame of described information on services group for receiving first broadcast frame that carries service catalogue of described access point transmission and receiving, wherein, the information on services group that each second broadcast frame carries is neither identical.
By applying service discovery method disclosed by the invention, access point and website, access point according to the summary info of each information on services by information on services according to different information on services group categories, information on services in each information on services group belongs to same COS, determine the airtime of each information on services group, and set up service catalogue according to the airtime of information on services group and message identification, this service catalogue comprises airtime and the message identification of all information on services groups, described information on services group and described service catalogue are added in broadcast frame, to website, send described broadcast frame, after website receives the broadcast frame that carries service catalogue and information on services group of access point transmission, the described service catalogue carrying according to described broadcast frame and information on services group, find the information on services that self is required, realized and utilized AP after all information on services classification, to send to STA, and STA receives the information on services needing in the moment of knowing, and do not need to receive all information on services, reduced the power consumption of STA, can support the passive service of big data quantity to find.
Accompanying drawing explanation
The flow chart of the service discovery method that Fig. 1 provides for the embodiment of the present invention one;
The access point that Fig. 2 provides for the embodiment of the present invention two sends the schematic diagram of broadcast frame to website;
The flow chart of the service discovery method that Fig. 3 provides for the embodiment of the present invention three;
The flow chart of the service discovery method that Fig. 4 provides for the embodiment of the present invention four;
The access point that Fig. 5 provides for the embodiment of the present invention five sends the schematic diagram of broadcast frame to website;
The access point that Fig. 6 provides for the embodiment of the present invention six sends the schematic diagram of broadcast frame to website;
The flow chart of the service discovery method that Fig. 7 provides for the embodiment of the present invention seven;
The schematic diagram of the access point that Fig. 8 provides for the embodiment of the present invention eight;
The schematic diagram of the website that Fig. 9 provides for the embodiment of the present invention nine;
The schematic diagram of the access point that Figure 10 provides for the embodiment of the present invention ten;
The schematic diagram of the website that Figure 11 provides for the embodiment of the present invention 11.
Embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The service discovery method that the embodiment of the present invention provides, access point and website, access point is found the information on services that self is required or from the service catalogue of described broadcast frame, is known the airtime of the information on services group at described self required information on services place from the information on services group of described broadcast frame in order to described website, determine the airtime of each information on services group, and the airtime of the summary info of described each information on services and described each information on services group is formed to service catalogue, described information on services group and described service catalogue are added in broadcast frame, to website, send described broadcast frame, after website receives the broadcast frame that carries service catalogue and information on services group of access point transmission, the described service catalogue carrying according to described broadcast frame and information on services group, find the information on services that self is required, realized and utilized AP after all information on services classification, to send to STA, and STA receives the information on services needing in the moment of knowing, and do not need to receive all information on services, reduced the power consumption of STA, can support the passive service of big data quantity to find.
Wherein, the mode of the passively discover service relating in all embodiment of the present invention refers to: access point AP sends broadcast frame to site STA, such as, this broadcast frame is beacon Beacon, site STA is waited for and is received the broadcast frame that access point AP sends, therefrom finds the information on services that self is required.Wherein, beacon (Beacon) is a kind of management frames of 802.11 standard regulations, by AP periodic broadcast, is sent.
The flow chart of the service discovery method that Fig. 1 provides for the embodiment of the present invention one.As shown in the figure, the embodiment of the present invention specifically comprises the following steps:
Step 110, access point is classified and is obtained different information on services groups according to the content of each information on services, each information on services group has a message identification, and the information on services in the content of each information on services group belongs to the COS corresponding with message identification.Wherein, the content of information on services refers to the detailed content of information on services, and the summary info of information on services refers to the simple content of information on services.
Particularly, the information on services of access point is provided by one or more STA, and this STA is AP website and non-AP website, and the one or more AP website of service and non-AP websites of providing report information on services to AP.Access point is classified according to the summary info of each information on services collecting all information on services.Such as, by cafe, all kinds of restaurants, Food Supermarkets etc. are grouped into food and drink class.Wherein, the summary info of each information on services refers to the simple information of this information on services, according to this simple information, can identify the COS that this information on services belongs to, and also can know a part for the detailed content of this information on services according to this simple information simultaneously.Such as, access point will obtain three information on services groups after all information on services classification: the information on services group of the information on services group of food and drink class, the information on services group of amusement class and traffic class.The message identification of the information on services group of wherein, food and drink class is food and drink; The message identification of the information on services group of amusement class is amusement; The message identification of the information on services group of traffic class is traffic.
In addition, each information on services group comprises the detailed content of all information on services of the COS corresponding with its message identification, such as, the information on services group of carrying food and drink class comprises the detailed content of all information on services that belong to the corresponding COS of this message identification of food and drink.
Step 120, access point is determined the airtime of each information on services group, and sets up service catalogue according to the airtime of information on services group and message identification, this service catalogue comprises airtime and the message identification of all information on services groups.
Particularly, the airtime of each information on services group, such as, three information on services groups: the information on services group of the information on services group of food and drink class, the information on services group of amusement class and traffic class, determine airtime of these three information on services groups.The message identification of the information on services group of food and drink class is food and drink; The message identification of the information on services group of amusement class is amusement; The message identification of the information on services group of traffic class is traffic.Set up service catalogue according to the airtime of these three information on services groups and message identification.
In addition, service catalogue can also comprise the summary info of the information on services in each information on services group.Therefore service catalogue not only comprises the message identification of all information on services groups, the simple information that also comprises all information on services that this access point AP provides is the summary info of the information on services in each information on services group, and the exact time that the detailed content of corresponding information on services group airtime each information on services that this information on services group comprises is broadcasted with it, such as, the information on services group of food and drink class sends after the 1st beacon period.
Step 130, access point adds information on services group and service catalogue in broadcast frame to.
Step 140, access point is determined the broadcast cycle of broadcast frame, and periodically to website, send broadcast frame according to broadcast cycle, in order to website, from the information on services group of broadcast frame, find the information on services that self is required or from the service catalogue of broadcast frame, know airtime of the information on services group at the information on services place that self is required.
In one embodiment, in step 130, service catalogue also comprises the summary info of the information on services in described each information on services group, access point adds information on services group respectively in each broadcast frame, and service catalogue is added to respectively in each broadcast frame, the information on services group that each broadcast frame is carried is neither same, and the service catalogue that each broadcast frame carries is all identical.
Particularly, each broadcast frame carries the information on services group of service catalogue and a type.Wherein, the type of the information on services group that each broadcast frame carries is different, such as, as first broadcast frame carries a service catalogue and an information on services group relevant to food and drink, second broadcast frame comprises an information on services group that service catalogue is relevant to amusement, and the 3rd broadcast frame comprises an information on services group that service catalogue is relevant to mode of transportation.Wherein, the service catalogue that all broadcast frames comprise is all identical.
In one embodiment, step 140, each broadcast frame carries the information on services group of service catalogue and a type.
Particularly, the information unit of this broadcast frame (Information Element, IE) formal definition is as shown in table 1.Information unit IE is the part of 802.11 management frames, and this management frames is comprised of frame head and frame entity (frame body) two parts.Wherein frame entity comprises fixed field and a series of information unit two parts.Information unit IE is comprised of three parts: the Element ID territory of 1 byte, the Length territory of 1 byte, and elongated Information territory.
Table 1
Element ID Length ServiceContent ServiceInfo
In above-mentioned broadcast frame, carry service catalogue and and the i.e. information on services group of a type of the detailed information on services of certain class service.Wherein, Element ID is for uniquely tagged IE; The length of Length mark IE; ServiceContent is service catalogue; ServiceInfo is that the detailed information on services of certain class service is the information on services group of a type.
In addition, when access point sends broadcast frame to website in step 140, can there is the transmission broadcast frame of scheduling.Such as, three information on services groups: the information on services group of the information on services group of food and drink class, the information on services group of amusement class and traffic class.The send mode that access point sends to website the broadcast frame that carries above-mentioned three information on services groups has multiple, such as, as shown in Figure 2, the broadcast frame 21 that carries the information on services group of the food and drink class transmission that makes number one, carry the broadcast frame 22 of information on services group of amusement class after the 1st beacon period, carry the broadcast frame 23 of information on services group of traffic class after the 2nd beacon period.Wherein, carry the broadcast frame of the information on services group of food and drink class, the broadcast frame of information on services group that carries amusement class and the broadcast frame that carries the information on services group of traffic class and form a broadcast cycle, this broadcast cycle is 3 beacon periods.In addition, this broadcast cycle circulation can circulate and repeatedly send according to actual conditions, and the length of this broadcast cycle can change according to the increase of COS and minimizing.
It should be noted that beacon period is defined as in all embodiment of the present invention: first broadcast frame starts until to send before second broadcast frame be a beacon period during this period of time from sending.
Therefore, the service discovery method that the embodiment of the present invention provides, access point according to the summary info of each information on services by described information on services according to different information on services group categories, determine the airtime of each information on services group, and set up service catalogue according to the airtime of information on services group and message identification, this service catalogue comprises airtime and the message identification of all information on services groups, described information on services group and described service catalogue are added in broadcast frame, to website, send described broadcast frame, realized in the situation that service catalogue is very little, can put it in the broadcast frame of each detailed information on services that comprises different COS, like this no matter receive which broadcast frame, can know the airtime of the broadcast frame that comprises other information on services, thereby can reduce the number of times that receives broadcast frame under certain situation, lookup service faster.
The flow chart of the service discovery method that Fig. 3 provides for the embodiment of the present invention three.The service discovery method that website side that this embodiment provides is carried out is that the service discovery method carried out of the access point side that provides with embodiment mono-is corresponding.As shown in the figure, the embodiment of the present invention specifically comprises the following steps:
Step 310, website receives the broadcast frame that carries service catalogue and information on services group that access point sends.Wherein, service catalogue comprises the message identification of information on services and the airtime of information on services group.
Step 320, website is found the information on services that self is required or from the service catalogue of broadcast frame, is known the airtime of the information on services group at the information on services place that self is required from the information on services group of broadcast frame.
In one embodiment, each broadcast frame in step 310 carries the information on services group of service catalogue and a type, the information on services group that each broadcast frame carries neither with, and the service catalogue that each broadcast frame carries is all identical.Service catalogue and information on services group are in a broadcast frame in this embodiment, but service catalogue and information on services group also can be in broadcast frames, and this situation is elaborated at other embodiment.In step 320, after website receives the broadcast frame of access point transmission, to this broadcast frame, adopt two kinds of different processing modes to carry out a series of processing, the processing procedure of each processing mode is as follows:
(1) to obtain a detailed information on services that comprises its service of wanting be that self required information on services group just stops scanning to STA, and under this mode, STA can not need the moment receiving to enter resting state.Its detailed process is:
While comprising self required information on services in the information on services group of the broadcast frame receiving, website stops receiving other broadcast frame.
While not comprising self required information on services in the information on services group of the broadcast frame receiving, after website knows that from service catalogue the airtime of the information on services group at the information on services place that self is required is definite airtime of broadcast frame of self needed detailed information on services, enter resting state, only in the airtime of the information on services group at self required information on services place, enter accepting state, thereby find the information on services that self is required the broadcast frame constantly receiving from this.
(2) STA need to scan always until obtain all comprise its want service detailed information on services be self required information on services group, the STA under this mode must be always in listening state.Its detailed process is:
While comprising self required information on services in the information on services group of the broadcast frame receiving, website just no longer receives other information on services that this access point sends, and carries out discard processing, still can receive the broadcast frame that other access points send.Here, the discard processing relating in the embodiment of the present invention, can directly throw away for not understanding bag, also can be for only separating medium access control (Medium Access Control, MAC) frame head, throw away after being confirmed to be the broadcast frame that this AP sends.Wherein, mac frame is divided into Frame, control frame, management frames.Here said Beacon be a kind of management frames.Identical with it as for the discard processing relating in other embodiments of the invention, no longer repeat to describe in detail.
In the information on services group of the broadcast frame receiving, do not comprise self required information on services, and in service catalogue, there is the information on services corresponding message identification of information on services and the airtime of information on services group required with self, website receives broadcast frame in the airtime of this information on services group, and the broadcast frame constantly receiving from this, find the information on services that self is required, and no longer receive other information on services of this access point, and other broadcast frames of this access point are done to discard processing.Because may there are a plurality of access point broadcast messages, website still can receive the information of other access points
But, in the information on services group of the broadcast frame receiving, do not comprise self required information on services, and in service catalogue, there is not the message identification of the corresponding information on services of the information on services required with self and the airtime of information on services group, website no longer receives the information on services that this access point sends, and for other broadcast frames of this access point, makes discard processing.
Therefore, the service discovery method that the embodiment of the present invention provides, after website receives the broadcast frame that carries service catalogue and information on services group of access point transmission, from the information on services group of described broadcast frame, find the information on services that self is required or from the service catalogue of described broadcast frame, know airtime of the information on services group at described self required information on services place, realized in the situation that service catalogue is very little, can put it in the broadcast frame of each detailed information on services that comprises different COS, which broadcast frame website no matter receive like this, can know the airtime of the broadcast frame that comprises other information on services, thereby can reduce the number of times that receives broadcast frame under certain situation, lookup service faster.
The flow chart of the service discovery method that Fig. 4 provides for the embodiment of the present invention four.As shown in the figure, the embodiment of the present invention specifically comprises the following steps:
Step 410, access point is classified and is obtained different information on services groups according to the content of each information on services, each information on services group has a message identification, the information on services in the content of each information on services group belong to the COS corresponding from message identification according to the summary info of each information on services by all information on services of access point according to different information on services group categories.Wherein, the information on services in information on services group belongs to same COS, and information on services group comprises the content information of all information on services that belong to same COS.But the type of the information on services in different information on services groups is different.This step is identical with step 110, here repeats no more.
Step 420, access point is determined the airtime of each information on services group, and set up service catalogue according to the airtime of information on services group and message identification, this service catalogue comprises airtime and the message identification of all information on services groups, and the airtime of definite service catalogue.This step is identical with step 120, here repeats no more.Wherein, service catalogue also comprises the summary info of the information on services in each information on services group.
Step 430, access point adds service catalogue in the first broadcast frame to, and the airtime of service catalogue and information on services group are added in the second different broadcast frames, and the information on services group that each second broadcast frame is carried is neither identical.
Particularly, service catalogue and information on services group are in different broadcast frames in embodiments of the present invention, and the broadcast frame at service catalogue place is defined as: the first broadcast frame, is defined as the broadcast frame at information on services group place: the second broadcast frame.Because information on services group may be for a plurality of, all the second broadcast frames also may be for a plurality of.Such as, carry the second broadcast frame of the information on services group of food and drink class, the second broadcast frame of information on services group that carries amusement class and the second broadcast frame that carries the information on services group of traffic class.
Wherein, carry the information unit IE formal definition of the first broadcast frame of service catalogue as shown in table 2.Element ID is for uniquely tagged IE; The length of Length mark IE; ServiceContent is service catalogue information.
Table 2
Element ID Length ServiceContent
The information unit IE formal definition of the second broadcast frame of carrying information on services group is as shown in table 3.Element ID is for uniquely tagged IE; The length of Length mark IE; ServiceInfo is that the detailed information on services of certain class service is the content of information on services group; Time is the exact time that carries the Beacon broadcast of service catalogue.
Table 3
Element ID Length ServiceInfo Time
Step 440, access point is determined the broadcast cycle of the first broadcast frame and the second broadcast frame, and periodically to website, send the first broadcast frame and the second broadcast frame according to this broadcast cycle, in order to website, from the service catalogue of the first broadcast frame, know the airtime of the information on services group of stating self required information on services place, and from the information on services group of the second broadcast frame, find information on services that self is required or the airtime of service catalogue.Wherein, the mode that access point sends the first broadcast frame and the second broadcast frame to website has a variety of, can have transmission the first broadcast frame and second broadcast frame of scheduling.
In one embodiment, in broadcast cycle, the first broadcast frame only sends once, and each second broadcast frame that carries different information on services groups sends once respectively.Such as, access point sends after described the first broadcast frame, then sends described the second broadcast frame, until all the second broadcast frames are sent, is a broadcast cycle, and then carries out next broadcast cycle.In addition, access point also can first send the second broadcast frame, then sends the first broadcast frame.Wherein, no matter the first broadcast frame or the second broadcast frame, the beacon period between every two broadcast frames is identical.
Particularly, access point sends the mode of the first broadcast frame and the second broadcast frame to website, such as, for carry service catalogue the first broadcast frame, carry the information on services group of food and drink class the second broadcast frame, carry amusement class information on services group the second broadcast frame and to carry the send mode of the second broadcast frame of information on services group of traffic class a lot.As shown in Figure 5, the first broadcast frame 51 that the carries service catalogue transmission that makes number one, after the second broadcast frame 52 that carries the information on services group of food and drink class comes the 1st beacon period, carry second broadcast frame 53 of information on services group of amusement class after the 2nd beacon period, carry second broadcast frame 54 of information on services group of traffic class after the 3rd beacon period.Wherein, carry the first broadcast frame 51 of service catalogue, the second broadcast frame 52 that carries the information on services group of food and drink class, the second broadcast frame 53 of information on services group that carries amusement class and the second broadcast frame 54 that carries the information on services group of traffic class and form a broadcast cycle, this broadcast cycle is 4 beacon periods.In addition, this broadcast cycle can circulate and repeatedly send according to actual conditions.The transmission cycle of wherein, carrying the first broadcast frame 51 of service catalogue is 4 beacon periods.
Again in another embodiment, in broadcast cycle, the first broadcast frame sends repeatedly, each second broadcast frame that carries different information on services groups sends respectively once, before or after sending, each second broadcast frame sends one and a plurality of the first broadcast frames, wherein, the byte number that the first broadcast frame takies is less than the byte number that described the second broadcast frame takies.Such as, its IE frame format of the first broadcast frame and the second broadcast frame is as shown in table 3.Access point can send the second broadcast frame successively, and sends the first broadcast frame between each second broadcast frame, until all the second broadcast frames are sent, is a broadcast cycle, and then carries out next broadcast cycle.Wherein, between two the second broadcast frames, send one or more the first broadcast frames, in the present embodiment, adopt the first broadcast frame that transmission frequency is higher to carry service catalogue, object is in order to improve website, to receive the probability of service catalogue, makes website lookup service faster.
Particularly, in embodiments of the present invention, by taking the first fewer broadcast frame of byte number, be customized for short beacon; By taking the second many broadcast frame of byte number, be customized for long letter mark.When access point sends the second broadcast frame successively, such as, according to first sending the second broadcast frame of the information on services group carry food and drink class, send the second broadcast frame of the information on services group of carrying amusement class again, the order that finally sends the second broadcast frame of the information on services group of carrying traffic class sends.But, at two the second broadcast frames, be that between long letter mark, also will to send one or more the first broadcast frames be short beacon.As shown in Figure 6, after second broadcast frame 61 of information on services group of food and drink class is carried in transmission, send continuously 5 the first broadcast frames 60 that carry service catalogue, then, after second broadcast frame 62 of information on services group of amusement class is carried in transmission, send continuously again 5 the first broadcast frames 60 that carry service catalogue, finally, after second broadcast frame 63 of information on services group of traffic class is carried in transmission, send continuously again 5 the first broadcast frames 60 that carry service catalogue, so far form a complete broadcast cycle, this broadcast cycle can circulate and repeatedly send according to actual conditions.Wherein, no matter the first broadcast frame or the second broadcast frame, the beacon period between every two broadcast frames is the short beacon cycle, but the beacon period between every two the second broadcast frames is long beacon period.
Therefore, the service discovery method that the embodiment of the present invention provides, access point according to the summary info of each information on services by described information on services according to different information on services group categories, determine the airtime of each information on services group, and the airtime of the summary info of described each information on services and described each information on services group is formed to service catalogue, service catalogue is added in the first broadcast frame, and the airtime of service catalogue and information on services group are added in the second different broadcast frames, the information on services group that each second broadcast frame is carried is neither identical, to website, send the first broadcast frame and the second broadcast frame, when website receives the first broadcast frame or the second broadcast frame that access point sends, realized and utilized AP that all information on services are classified, and service catalogue is added in the first broadcast frame, and the airtime of service catalogue and information on services group are added in the second different broadcast frames, and send the first broadcast frame and the second broadcast frame to website, make website in the moment of knowing, receive according to the first broadcast frame and the second broadcast frame the information on services needing, and do not need to receive all information on services, reduced the power consumption of STA, can support the passive service of big data quantity to find.
The flow chart of the service discovery method that Fig. 7 provides for the embodiment of the present invention seven.The service discovery method that website side that this embodiment provides is carried out is that the service discovery method carried out of the access point side that provides with embodiment tetra-is corresponding.As shown in the figure, the embodiment of the present invention specifically comprises the following steps:
Step 710, website receives the broadcast frame that carries service catalogue and information on services group that access point sends, wherein, service catalogue comprises the message identification of information on services and the airtime of information on services group, and the broadcast frame receiving comprises the first broadcast frame and the second broadcast frame.
Particularly, website receives first broadcast frame that carries service catalogue of access point transmission or carries the airtime of service catalogue and the second broadcast frame of information on services group, and wherein, the information on services group that each second broadcast frame carries is neither identical.
Step 720, website is found the airtime of information on services that self is required or service catalogue or from the service catalogue of broadcast frame, is known the airtime of the information on services group at described self required information on services place from the information on services group of broadcast frame.Wherein, the broadcast frame receiving comprises the first broadcast frame and the second broadcast frame.The first broadcast frame carries service catalogue, and the second broadcast frame carries the information on services group of a type and the airtime of service catalogue.
Particularly, after website receives the broadcast frame of access point transmission, to this first broadcast frame or the second broadcast frame, adopt two kinds of different processing modes to carry out a series of processing, the processing procedure of each processing mode is as follows:
(1) to obtain a detailed information on services that comprises its service of wanting be that self required information on services group just stops scanning to STA, and under this mode, STA can not need the moment receiving to enter resting state.Its detailed process is:
When what receive, it is the first broadcast frame, the service catalogue carrying from the first broadcast frame, know after airtime of information on services group at the information on services place that self is required, enter resting state, only in the airtime of the information on services group at self required information on services place, enter accepting state, thereby find the information on services that self is required from the broadcast frame receiving.
When what receive, be the second broadcast frame, and while comprising self required information on services in the second broadcast frame information on services group of carrying, website stops receiving this access point sends other broadcast frame;
When what receive, it is the second broadcast frame, and while not comprising self required information on services in the information on services group that the second broadcast frame carries, according to the second broadcast frame, know after the airtime of service catalogue, enter resting state, only in the airtime of service catalogue, enter accepting state, and from the first broadcast frame that carries service catalogue receiving, know after airtime of information on services group at the information on services place that self is required, and then enter resting state, only in the airtime of the information on services group at self required information on services place, enter accepting state, thereby find the information on services that self is required from the second broadcast frame that carries information on services group receiving.
(2) STA need to scan always until obtain all comprise its want service detailed information on services be self required information on services group, the STA under this mode must be always in listening state.Its detailed process is:
When what receive, it is the first broadcast frame that carries service catalogue, and in service catalogue, there is the information on services corresponding message identification of information on services and the airtime of information on services group required with self, in the airtime of information on services group, receive the second broadcast frame, and find the information on services that self is required from the second broadcast frame receiving, other broadcast frames for this access point, such as, the first broadcast frame or the second broadcast frame, make discard processing;
When what receive, it is the first broadcast frame that carries service catalogue, and in service catalogue, there is not the message identification of the corresponding information on services of the information on services required with self and the airtime of information on services group, website no longer receives the information on services that access point sends, other broadcast frames for this access point, such as, the first broadcast frame or the second broadcast frame, make discard processing.
When what receive, be the second broadcast frame, and while comprising self required information on services in the second broadcast frame information on services group of carrying, website no longer receive other information on services, other broadcast frames for this access point, such as, the first broadcast frame or the second broadcast frame, make discard processing.
When what receive, it is the second broadcast frame, and while not comprising self required information on services in the information on services group that the second broadcast frame carries, according to the second broadcast frame, know the airtime of service catalogue, in order to website, in the airtime of service catalogue, receive the first broadcast frame.
In addition, when the first broadcast frame is beacon, the second broadcast frame is also beacon, but when the byte number that takies of the first broadcast frame is less than the byte number that described the second broadcast frame takies, website is same as described above to the processing procedure of the first broadcast frame or the second broadcast frame, here repeats no more.
Therefore, the service discovery method that the embodiment of the present invention provides, website receives the broadcast frame that carries service catalogue and information on services group that access point sends, wherein, service catalogue comprises the message identification of information on services and the airtime of information on services group, the broadcast frame receiving comprises the first broadcast frame and the second broadcast frame, the service catalogue carrying according to the broadcast frame receiving and information on services group, find the information on services that self is required, realized website and in the moment of knowing, received according to the first broadcast frame and the second broadcast frame the information on services needing, and do not need to receive all information on services, reduced the power consumption of STA, can support the passive service of big data quantity to find.
The schematic diagram of the access point that Fig. 8 provides for the embodiment of the present invention eight.This access point is for carrying out the service discovery method that the embodiment of the present invention one to seven provides.As shown in the figure, the embodiment of the present invention specifically comprises: taxon 81, processing unit 82, adding device 83 and transmitting element 84.
Taxon 81 is classified for the content of each information on services, obtain different information on services groups, each information on services group has the summary info of each information on services of message identification, the content of the information on services in each information on services group belongs to the COS corresponding with message identification, and information on services group is transferred to processing unit 82; Processing unit 82 is for receiving information on services group from taxon 81, determine the airtime of each information on services group, and set up service catalogue according to the airtime of information on services group and message identification, this service catalogue comprises airtime and the message identification of all information on services groups, and information on services group and service catalogue are transferred to adding device 83; Adding device 83, for receiving information on services group and service catalogue from processing unit 82, adds information on services group and service catalogue in broadcast frame to, and broadcast frame is transferred to transmitting element 84; Transmitting element 84 is for receiving broadcast frame from adding device 83, determine the broadcast cycle of broadcast frame, and periodically to website, send broadcast frame according to broadcast cycle, in order to described website, from the information on services group of described broadcast frame, find the information on services that self is required or from the service catalogue of described broadcast frame, know airtime of the information on services group at described self required information on services place.
In one embodiment, service catalogue also comprises the summary info of the information on services in each information on services group, adding device 83 is for adding respectively information on services group to each broadcast frame, and service catalogue is added to respectively in each broadcast frame, the information on services group that each broadcast frame is carried is neither same, and the service catalogue that each broadcast frame carries is all identical, wherein, each broadcast frame carries the information on services group of service catalogue and a type.
In another embodiment, service catalogue also comprises the summary info of the information on services in each information on services group, and processing unit 82 is also for determining the airtime of service catalogue.The broadcast frame relating in this embodiment comprises: the first broadcast frame and the second broadcast frame.Adding device 83 is for service catalogue being added to the first broadcast frame, and the airtime of service catalogue and information on services group are added in the second different broadcast frames, and the information on services group that each second broadcast frame is carried is neither identical.Transmitting element 84 is for sending the first broadcast frame to website, in order to website, from the first broadcast frame, know the airtime of the required information on services of access point transmission self, and to website the second broadcast frame, in order to website, from the second broadcast frame, find the information on services that self is required.
Wherein, in the broadcast cycle of transmitting element 84, the first broadcast frame only sends once, and each second broadcast frame that carries different information on services groups sends respectively once; Or the first broadcast frame sends repeatedly, each second broadcast frame that carries different information on services groups sends respectively once, before sending, each second broadcast frame sends one and a plurality of the first broadcast frames, wherein, the byte number that described the first broadcast frame takies is less than the byte number that described the second broadcast frame takies.Therefore, access point has the form of multiple transmission the first broadcast frame and the second broadcast frame, such as: send after the first broadcast frame, then send the second broadcast frame, until all the second broadcast frames are sent, be a broadcast cycle, and then carry out next broadcast cycle; Or sending successively the second broadcast frame, and send one or more the first broadcast frames between each second broadcast frame, is a broadcast cycle until all the second broadcast frames are sent, and then carries out next broadcast cycle.
Therefore, the access point that the embodiment of the present invention provides, according to the summary info of each information on services by described information on services according to different information on services group categories, determine the airtime of each information on services group, and the airtime of the summary info of described each information on services and described each information on services group is formed to service catalogue, described information on services group and described service catalogue are added in broadcast frame, to website, send described broadcast frame, realized and utilized AP after all information on services classification, to send to STA, and STA receives the information on services needing in the moment of knowing, and do not need to receive all information on services, reduced the power consumption of STA, can support the passive service of big data quantity to find.
The schematic diagram of the website that Fig. 9 provides for the embodiment of the present invention nine.This website is for carrying out the service discovery method that the embodiment of the present invention one to seven provides.As shown in the figure, the embodiment of the present invention specifically comprises: receiving element 91 and discovery unit 92.
The broadcast frame that carries service catalogue and information on services group that receiving element 91 sends for receiving access point, service catalogue comprises the message identification of information on services and the airtime of information on services group, and broadcast frame is transferred to and finds unit 92; Find that unit 92 is for receiving broadcast frame from receiving element, from the information on services group of broadcast frame, find the information on services that self is required or from the service catalogue of broadcast frame, know airtime of the information on services group at the information on services place that self is required.
When in broadcast frame, existing service catalogue has again information on services group, in one embodiment, while finding that unit 92 comprises self required information on services for the information on services group of the broadcast frame when receiving, website stops receiving other broadcast frame of access point transmission; While not comprising self required information on services in the information on services group of the broadcast frame receiving, website was known after airtime of information on services group at the information on services place that self is required from service catalogue, enter resting state, only in the airtime of the information on services group at self required information on services place, enter accepting state, thereby find the information on services that self is required from the broadcast frame receiving.
In another embodiment, while finding that unit 92 comprises self required information on services for the information on services group of the broadcast frame when receiving, other the information on services that website no longer receives that access point sends, other broadcast frames that send for access point are made discard processing; In the information on services group of the broadcast frame receiving, do not comprise self required information on services, and in service catalogue, there is the information on services corresponding message identification of information on services and the airtime of information on services group required with self, in the airtime of information on services group, receive broadcast frame, and from the broadcast frame receiving, find the information on services that self is required, other broadcast frames that send for this access point are made discard processing.In addition, find that unit 92 does not also comprise self required information on services for the information on services group of the broadcast frame when receiving, and in service catalogue, there is not the message identification of the corresponding information on services of the information on services required with self and the airtime of information on services group, website no longer receives the information on services that access point sends, and other broadcast frames that send for access point are made discard processing.
When broadcast frame comprises the first broadcast frame and the second broadcast frame, receiving element 91 is for receiving first broadcast frame that carries service catalogue of access point transmission or carrying the airtime of service catalogue and the second broadcast frame of information on services group, wherein, the information on services group that each second broadcast frame carries is neither identical.
In one embodiment, find that unit 92 is the first broadcast frame for what ought receive, the service catalogue carrying from the first broadcast frame, know after airtime of information on services group at the information on services place that self is required, enter resting state, only in the airtime of the information on services group at self required information on services place, enter accepting state, thereby find the information on services that self is required from the broadcast frame receiving; When what receive, be the second broadcast frame, and while comprising self required information on services in the second broadcast frame information on services group of carrying, website stop receiving other broadcast frame.In addition, find that unit 92 is also the second broadcast frame for what ought receive, and while not comprising self required information on services in the information on services group that the second broadcast frame carries, according to the second broadcast frame, know after the airtime of service catalogue, enter resting state, only in the airtime of service catalogue, enter accepting state, and from the first broadcast frame that carries service catalogue receiving, know after airtime of information on services group at the information on services place that self is required, and then enter resting state, only in the airtime of the information on services group at self required information on services place, enter accepting state, thereby find the information on services that self is required from the second broadcast frame that carries information on services group receiving.
In another embodiment, find that unit 92 is the first broadcast frame that carries service catalogue for what ought receive, and in service catalogue, there is the information on services corresponding message identification of information on services and the airtime of information on services group required with self, in the airtime of information on services group, receive the second broadcast frame, and from the second broadcast frame receiving, find the information on services that self is required, for this access point, send other first broadcast frames or the second broadcast frame make discard processing; When what receive, it is the first broadcast frame that carries service catalogue, and in service catalogue, there is not the message identification of the corresponding information on services of the information on services required with self and the airtime of information on services group, website no longer receives the information on services that access point sends, for this access point, send other broadcast frames, the first broadcast frame or the second broadcast frame are made discard processing.In addition, find that unit 92 is the second broadcast frame for what ought receive, and while comprising self required information on services in the information on services group that the second broadcast frame carries, website no longer receives other information on services, for this access point, send other broadcast frames, such as, the second broadcast frame or the first broadcast frame are made discard processing; When what receive, it is the second broadcast frame, and while not comprising self required information on services in the information on services group that the second broadcast frame carries, according to the second broadcast frame, know the airtime of service catalogue, in order to website, in the airtime of service catalogue, receive the first broadcast frame.
Therefore, the website that the embodiment of the present invention provides, after website receives the broadcast frame that carries service catalogue and information on services group of access point transmission, from the information on services group of broadcast frame, find the information on services that self is required or from the service catalogue of broadcast frame, know airtime of the information on services group at the information on services place that self is required, realized and utilized AP after all information on services classification, to send to STA, and STA receives the information on services needing in the moment of knowing, and do not need to receive all information on services, reduced the power consumption of STA, can support the passive service of big data quantity to find.
The schematic diagram of the access point that Figure 10 provides for the embodiment of the present invention ten.This access point is for carrying out the passive service discover method that the embodiment of the present invention one to seven provides.As shown in the figure, the embodiment of the present invention specifically comprises: as shown in the figure, this access point 100 comprises: radiating circuit 102, receiving circuit 103, power controller 104, decoding processor 105, processing unit 106, memory 107 and antenna 101.Processing unit 106 is controlled the operation of access point 100, and processing unit 106 can also be called CPU.Memory 107 can comprise read-only memory and random access memory, and provides instruction and data to processing unit 106.A part for memory 107 can also comprise non-volatile row random access memory (NVRAM).In concrete application, access point 100 can embed or itself can be exactly the Wireless Telecom Equipment of mobile phone and so on for example, can also comprise the carrier that holds radiating circuit 102 and receiving circuit 103, to allow carrying out data transmission and reception between access point 100 and remote location.Radiating circuit 102 and receiving circuit 103 can be coupled to antenna 101.Each assembly of access point 100 is coupled by bus system 1000, and wherein, bus system 1000, except comprising data/address bus, also comprises power bus, control bus and status signal bus in addition.But for clear, see from tomorrow, in the drawings various buses are all designated as to bus system 1000.Access point 100 can also comprise processing unit 106 for the treatment of signal, comprise power controller 104, decoding processor 105 in addition.In concrete different product, decoder 105 may become one with processing unit 106.
Disclosed each step and the logic diagram in the inventive method embodiment can be realized or carry out to processor.General processor can be that microprocessor or this processor can be also the processors of any routine, decoder etc.Step in conjunction with the disclosed method of the embodiment of the present invention can directly be presented as that hardware processor is complete, or complete with the hardware in decoding processor and software module combination.Software module can be positioned at random asccess memory, and flash memory, read-only memory, in the storage medium of this area maturations such as programmable read only memory or electrically erasable programmable memory, register.This storage medium is positioned at memory 107, and the information in decoding unit or processing unit read memory 107 completes the step of the passive service discover method that the embodiment of the present invention one to seven provides in conjunction with its hardware.
The schematic diagram of the website that Figure 11 provides for the embodiment of the present invention 11.This website is for carrying out the passive service discover method that the embodiment of the present invention one to seven provides.As shown in the figure, this website 110 comprises: radiating circuit 112, receiving circuit 113, power controller 114, decoding processor 115, processing unit 116, memory 117 and antenna 111.Processing unit 116 is controlled the operation of website 110, and processing unit 116 can also be called CPU.Memory 117 can comprise read-only memory and random access memory, and provides instruction and data to processing unit 116.A part for memory 117 can also comprise non-volatile row random access memory (NVRAM).In concrete application, website 110 can embed or itself can be exactly the Wireless Telecom Equipment of mobile phone and so on for example, can also comprise the carrier that holds radiating circuit 112 and receiving circuit 113, to allow carrying out data transmission and reception between website 110 and remote location.Radiating circuit 112 and receiving circuit 113 can be coupled to antenna 111.Each assembly of website 110 is coupled by bus system 1100, and wherein, bus system 1100, except comprising data/address bus, also comprises power bus, control bus and status signal bus in addition.But for clear, see from tomorrow, in the drawings various buses are all designated as to bus system 1100.Website 110 can also comprise processing unit 116 for the treatment of signal, comprise power controller 114, decoding processor 115 in addition.In concrete different product, decoder 115 may become one with processing unit 116.
Disclosed each step and the logic diagram in the inventive method embodiment can be realized or carry out to processor.General processor can be that microprocessor or this processor can be also the processors of any routine, decoder etc.Step in conjunction with the disclosed method of the embodiment of the present invention can directly be presented as that hardware processor is complete, or complete with the hardware in decoding processor and software module combination.Software module can be positioned at random asccess memory, and flash memory, read-only memory, in the storage medium of this area maturations such as programmable read only memory or electrically erasable programmable memory, register.This storage medium is positioned at memory 117, and the information in decoding unit or processing unit read memory 117 completes the step of the passive service discover method that the embodiment of the present invention one to seven provides in conjunction with its hardware.
Professional should further recognize, unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with electronic hardware, computer software or the combination of the two, for the interchangeability of hardware and software is clearly described, composition and the step of each example described according to function in the above description in general manner.These functions are carried out with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can specifically should be used for realizing described function with distinct methods to each, but this realization should not thought and exceeds scope of the present invention.
The software module that the method for describing in conjunction with embodiment disclosed herein or the step of algorithm can use hardware, processor to carry out, or the combination of the two is implemented.Software module can be placed in the storage medium of any other form known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
Above-described embodiment; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only the specific embodiment of the present invention; the protection range being not intended to limit the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (30)

1. a service discovery method, is characterized in that, described method comprises:
Access point is classified and is obtained different information on services groups according to the content of each information on services, and each information on services group has a message identification, and the content of the information on services in each information on services group belongs to the COS corresponding with described message identification;
Described access point is determined the airtime of described each information on services group, and sets up service catalogue according to the airtime of described information on services group and message identification, and described service catalogue comprises airtime and the message identification of all information on services groups;
Described access point adds described information on services group and described service catalogue in broadcast frame to;
Described access point is determined the broadcast cycle of described broadcast frame, and periodically to website, send described broadcast frame according to described broadcast cycle, in order to described website, from the information on services group of described broadcast frame, find the information on services that self is required or from the service catalogue of described broadcast frame, know airtime of the information on services group at described self required information on services place.
2. service discovery method according to claim 1, is characterized in that, described service catalogue also comprises the summary info of the information on services in described each information on services group, described described information on services group and described service catalogue is added in broadcast frame, comprising:
Described information on services group is added to respectively in each broadcast frame, and described service catalogue is added to respectively in described each broadcast frame, the information on services group that described each broadcast frame is carried is neither same, and the described service catalogue that described each broadcast frame carries is all identical, wherein, each broadcast frame carries the information on services group of service catalogue and a type.
3. service discovery method according to claim 1, it is characterized in that, described in the summary info of the information on services described in described service catalogue also comprises in each information on services group, determine the airtime of described each information on services group, and set up service catalogue according to the airtime of described information on services group and message identification, also comprise:
According to the airtime of described each information on services group, determine the airtime of described service catalogue.
4. service discovery method according to claim 3, is characterized in that, described broadcast frame comprises: the first broadcast frame and the second broadcast frame; Described described information on services group and described service catalogue are added in broadcast frame, comprising:
Described service catalogue is added in the first broadcast frame, and the airtime of described service catalogue and described information on services group are added in the second different broadcast frames, the information on services group that each second broadcast frame is carried is neither identical.
5. service discovery method according to claim 4, is characterized in that, describedly according to described broadcast cycle, periodically to website, sends described broadcast frame, comprising:
According to described broadcast cycle, periodically to described website, send described the first broadcast frame and the second broadcast frame, in order to described website, from the service catalogue of described the first broadcast frame, know the airtime of the information on services group at described self required information on services place, and from the information on services group of described the second broadcast frame, find information on services that self is required and the airtime of described service catalogue.
6. service discovery method according to claim 5, is characterized in that, according to described broadcast cycle, periodically to described website, sends described the first broadcast frame and the second broadcast frame comprises:
In described broadcast cycle, described the first broadcast frame only sends once, and described the second broadcast frame that each carries different information on services groups sends once respectively.
7. service discovery method according to claim 5, is characterized in that, according to described broadcast cycle, periodically to described website, sends described the first broadcast frame and the second broadcast frame, comprising:
In described broadcast cycle, described the first broadcast frame sends repeatedly, each described second broadcast frame that carries different information on services groups sends respectively once, before or after sending, each second broadcast frame sends one and a plurality of the first broadcast frames, wherein, the byte number that described the first broadcast frame takies is less than the byte number that described the second broadcast frame takies.
8. a service discovery method, is characterized in that, described method comprises:
Website receives the broadcast frame that carries service catalogue and information on services group that access point sends, and described service catalogue comprises the message identification of information on services and the airtime of information on services group;
Described website is found the information on services that self is required or from the service catalogue of described broadcast frame, is known the airtime of the information on services group at described self required information on services place from the information on services group of described broadcast frame.
9. service discovery method according to claim 8, it is characterized in that, the described airtime of finding the information on services that self is required or know the information on services group at described self required information on services place from the information on services group of described broadcast frame from the service catalogue of described broadcast frame, comprising:
While comprising described self required information on services in the described information on services group of the described broadcast frame receiving, described website stops receiving described access point sends other broadcast frame;
While not comprising described self required information on services in the described information on services group of the described broadcast frame receiving, described website was known after airtime of information on services group at described self required information on services place from described service catalogue, enter resting state, airtime in the information on services group at described self required information on services place enters accepting state, finds described self required information on services from the broadcast frame receiving.
10. service discovery method according to claim 8, it is characterized in that, the described airtime of finding the information on services that self is required or know the information on services group at described self required information on services place from the information on services group of described broadcast frame from the service catalogue of described broadcast frame, comprising:
While comprising described self required information on services in the described information on services group of the described broadcast frame receiving, other the information on services that described website no longer receives that described access point sends, other broadcast frames that send for described access point are made discard processing;
In the described information on services group of the described broadcast frame receiving, do not comprise described self required information on services, and in described service catalogue, there is the message identification of described information on services and the airtime of information on services group corresponding with described self required information on services, in the airtime of described information on services group, receive broadcast frame, and from the described broadcast frame receiving, find described self required information on services, other broadcast frames that send for described access point are made discard processing;
In the described information on services group of the described broadcast frame receiving, do not comprise described self required information on services, and in described service catalogue, there is not the message identification of described information on services and the airtime of information on services group corresponding with described self required information on services, described website no longer receives the information on services that described access point sends, and other broadcast frames that send for described access point are made discard processing.
11. service discovery methods according to claim 8, is characterized in that, described broadcast frame comprises the first broadcast frame and the second broadcast frame, and described website receives the broadcast frame that carries information on services group and service catalogue that access point sends, and comprising:
The first broadcast frame that carries service catalogue and the reception that receive described access point transmission carry the airtime of described service catalogue and the second broadcast frame of described information on services group, and wherein, the information on services group that each second broadcast frame carries is neither identical.
12. service discovery methods according to claim 11, it is characterized in that, the described airtime of finding the information on services that self is required or know the information on services group at described self required information on services place from the information on services group of described broadcast frame from the service catalogue of described broadcast frame, comprising:
When what receive, it is described the first broadcast frame, the service catalogue carrying from described the first broadcast frame, know after airtime of information on services group at described self required information on services place, enter resting state, airtime in the information on services group at described self required information on services place enters accepting state, finds described self required information on services from the broadcast frame receiving;
When what receive, be described the second broadcast frame, and while comprising described self required information on services in described the second broadcast frame described information on services group of carrying, described website stops receiving described access point sends other broadcast frame.
13. according to the service discovery method described in claim 11 or 12, it is characterized in that, the described airtime of finding the information on services that self is required or know the information on services group at described self required information on services place from the information on services group of described broadcast frame from the service catalogue of described broadcast frame, comprising:
When what receive, it is described the second broadcast frame, and while not comprising described self required information on services in the described information on services group that described the second broadcast frame carries, according to described the second broadcast frame, know after the airtime of described service catalogue, enter resting state, in the airtime of described service catalogue, enter accepting state;
From described the first broadcast frame that carries described service catalogue receiving, know after airtime of information on services group at described self required information on services place, and then enter resting state, airtime in the information on services group at described self required information on services place enters accepting state, finds described self required information on services from described the second broadcast frame that carries described information on services group receiving.
14. service discovery methods according to claim 11, it is characterized in that, the described airtime of finding the information on services that self is required or know the information on services group at described self required information on services place from the information on services group of described broadcast frame from the service catalogue of described broadcast frame, comprising:
When what receive, it is described the first broadcast frame that carries described service catalogue, and in described service catalogue, there is the message identification of described information on services and the airtime of information on services group corresponding with described self required information on services, in the airtime of described information on services group, receive described the second broadcast frame, and from described the second broadcast frame receiving, find described self required information on services, other first broadcast frames or the second broadcast frame that for described access point, send are made discard processing;
When what receive, it is described the first broadcast frame that carries described service catalogue, and in described service catalogue, there is not the message identification of described information on services and the airtime of information on services group corresponding with described self required information on services, described website no longer receives the information on services that described access point sends, and other first broadcast frames or the second broadcast frame that for described access point, send are made discard processing.
15. according to the service discovery method described in claim 11 or 14, it is characterized in that, the described airtime of finding the information on services that self is required or know the information on services group at described self required information on services place from the information on services group of described broadcast frame from the service catalogue of described broadcast frame, comprising:
When what receive, it is described the second broadcast frame, and while comprising described self required information on services in the described information on services group that described the second broadcast frame carries, described website no longer receives the information on services that described access point sends, and other second broadcast frames or the first broadcast frame that for described access point, send are made discard processing;
When what receive, it is described the second broadcast frame, and while not comprising described self required information on services in the described information on services group that described the second broadcast frame carries, according to described the second broadcast frame, know the airtime of described service catalogue, in order to described website, in the airtime of described service catalogue, receive described the first broadcast frame.
16. 1 kinds of access points, is characterized in that, described access point comprises:
Taxon, for classifying according to the content of each information on services, obtain different information on services groups, each information on services group has the summary info of each information on services of message identification, the content of the information on services in each information on services group belongs to the COS corresponding with described message identification, and described information on services group is transferred to processing unit;
Processing unit, for receiving described information on services group from described taxon, determine the airtime of described each information on services group, and set up service catalogue according to the airtime of described information on services group and message identification, described service catalogue comprises airtime and the message identification of all information on services groups, and described information on services group and described service catalogue are transferred to adding device;
Adding device, for receive described information on services group and described service catalogue from described processing unit, adds described information on services group and described service catalogue in broadcast frame to, and described broadcast frame is transferred to transmitting element;
Transmitting element, for receiving described broadcast frame from adding device, determine the broadcast cycle of described broadcast frame, and periodically to website, send described broadcast frame according to described broadcast cycle, in order to described website, from the information on services group of described broadcast frame, find the information on services that self is required or from the service catalogue of described broadcast frame, know airtime of the information on services group at described self required information on services place.
17. access points according to claim 17, it is characterized in that, described service catalogue also comprises the summary info of the information on services in described each information on services group, described adding device is for adding respectively described information on services group to each broadcast frame, and described service catalogue is added to respectively in described each broadcast frame, the information on services group that described each broadcast frame is carried is neither same, and the described service catalogue that described each broadcast frame carries is all identical, wherein, each broadcast frame carries the information on services group of service catalogue and a type.
18. access points according to claim 17, it is characterized in that, described service catalogue also comprises the summary info of the information on services in described each information on services group, and described processing unit is also for determining the airtime of described service catalogue according to the airtime of described each information on services group.
19. access points according to claim 19, is characterized in that, described broadcast frame comprises: the first broadcast frame and the second broadcast frame; Described adding device is for adding described service catalogue to first broadcast frame, and the airtime of described service catalogue and described information on services group are added in the second different broadcast frames, and the information on services group that each second broadcast frame is carried is neither identical.
20. access points according to claim 20, it is characterized in that, described transmitting element is for periodically sending described the first broadcast frame and the second broadcast frame to described website according to described broadcast cycle, in order to described website, from the service catalogue of described the first broadcast frame, know the airtime of the information on services group at described self required information on services place, and from the information on services group of described the second broadcast frame, find information on services that self is required and the airtime of described service catalogue.
21. access points according to claim 21, is characterized in that, described transmitting element is also in described broadcast cycle, and described the first broadcast frame only sends once, and described the second broadcast frame that each carries different information on services groups sends once respectively.
22. access points according to claim 21, it is characterized in that, described transmitting element is also in described broadcast cycle, described the first broadcast frame sends repeatedly, each described second broadcast frame that carries different information on services groups sends respectively once, before or after each second broadcast frame sends, send one and a plurality of the first broadcast frames, wherein, the byte number that described the first broadcast frame takies is less than the byte number that described the second broadcast frame takies.
23. 1 kinds of websites, is characterized in that, described website comprises:
Receiving element, the broadcast frame that carries service catalogue and information on services group sending for receiving access point, described service catalogue comprises the message identification of information on services and the airtime of information on services group, and described broadcast frame is transferred to discovery unit;
Find unit, for receiving described broadcast frame from described receiving element, from the information on services group of described broadcast frame, find the information on services that self is required or from the service catalogue of described broadcast frame, know airtime of the information on services group at described self required information on services place.
24. websites according to claim 23, it is characterized in that, described discovery unit is when comprising described self required information on services when the described information on services group of the described broadcast frame receiving, described website stops receiving other broadcast frame of described access point transmission; While not comprising described self required information on services in the described information on services group of the described broadcast frame receiving, described website was known after airtime of information on services group at described self required information on services place from described service catalogue, enter resting state, airtime in the information on services group at described self required information on services place enters accepting state, finds described self required information on services from the broadcast frame receiving.
25. websites according to claim 23, it is characterized in that, described discovery unit is for when described in the described information on services group of the described broadcast frame receiving comprises during self required information on services, other the information on services that described website no longer receives that described access point sends, other broadcast frames that send for described access point are made discard processing; In the described information on services group of the described broadcast frame receiving, do not comprise described self required information on services, and in described service catalogue, there is the message identification of described information on services and the airtime of information on services group corresponding with described self required information on services, in the airtime of described information on services group, receive broadcast frame, and from the described broadcast frame receiving, find described self required information on services, other broadcast frames that send for described access point are made discard processing; In the described information on services group of the described broadcast frame receiving, do not comprise described self required information on services, and in described service catalogue, there is not the message identification of described information on services and the airtime of information on services group corresponding with described self required information on services, described website no longer receives the information on services that described access point sends, and other broadcast frames that send for described access point are made discard processing.
26. websites according to claim 23, it is characterized in that, described broadcast frame comprises the first broadcast frame and the second broadcast frame, described receiving element carries the airtime of described service catalogue and the second broadcast frame of described information on services group for receiving first broadcast frame that carries service catalogue of described access point transmission and receiving, wherein, the information on services group that each second broadcast frame carries is neither identical.
27. websites according to claim 26, it is characterized in that, it is described the first broadcast frame that described discovery unit is used for when what receive, the service catalogue carrying from described the first broadcast frame, know after airtime of information on services group at described self required information on services place, enter resting state, airtime in the information on services group at described self required information on services place enters accepting state, finds described self required information on services from the broadcast frame receiving; When what receive, be described the second broadcast frame, and while comprising described self required information on services in described the second broadcast frame described information on services group of carrying, described website stops receiving described access point sends other broadcast frame.
28. according to the website described in claim 26 or 27, it is characterized in that, described discovery unit is also described the second broadcast frame for what ought receive, and while not comprising described self required information on services in the described information on services group that described the second broadcast frame carries, according to described the second broadcast frame, know after the airtime of described service catalogue, enter resting state, in the airtime of described service catalogue, enter accepting state; From described the first broadcast frame that carries described service catalogue receiving, know after airtime of information on services group at described self required information on services place, and then enter resting state, airtime in the information on services group at described self required information on services place enters accepting state, finds described self required information on services from described the second broadcast frame that carries described information on services group receiving.
29. websites according to claim 26, it is characterized in that, it is described the first broadcast frame that carries described service catalogue that described discovery unit is used for when what receive, and in described service catalogue, there is the message identification of described information on services and the airtime of information on services group corresponding with described self required information on services, in the airtime of described information on services group, receive described the second broadcast frame, and from described the second broadcast frame receiving, find described self required information on services, other first broadcast frames or the second broadcast frame that for described access point, send are made discard processing, when what receive, it is described the first broadcast frame that carries described service catalogue, and in described service catalogue, there is not the message identification of described information on services and the airtime of information on services group corresponding with described self required information on services, described website no longer receives the information on services that described access point sends, other first broadcast frames or the second broadcast frame that for described access point, send are made discard processing.
30. according to the website described in claim 26 or 29, it is characterized in that, it is described the second broadcast frame that described discovery unit is used for when what receive, and while comprising described self required information on services in the described information on services group that described the second broadcast frame carries, described website no longer receives other information on services, and other second broadcast frames or the first broadcast frame that for described access point, send are made discard processing; When what receive, it is described the second broadcast frame, and while not comprising described self required information on services in the described information on services group that described the second broadcast frame carries, according to described the second broadcast frame, know the airtime of described service catalogue, in order to described website, in the airtime of described service catalogue, receive described the first broadcast frame.
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