CN102457907B - The method and apparatus of identify customer end type in Centralized Wireless LAN - Google Patents
The method and apparatus of identify customer end type in Centralized Wireless LAN Download PDFInfo
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- CN102457907B CN102457907B CN201010520221.3A CN201010520221A CN102457907B CN 102457907 B CN102457907 B CN 102457907B CN 201010520221 A CN201010520221 A CN 201010520221A CN 102457907 B CN102457907 B CN 102457907B
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Abstract
The invention provides a kind of method and apparatus identifying the Machine Type of dhcp client in Centralized Wireless LAN.First, the Machine Type information of this client is filled in DHCP request message by dhcp client, and the DHCP request message of the Machine Type information being filled with this client is sent to Dynamic Host Configuration Protocol server.After Dynamic Host Configuration Protocol server receives the DHCP request message from dhcp client, according to the Machine Type information that this DHCP request message comprises, just can determine the Machine Type of dhcp client.Once Dynamic Host Configuration Protocol server be realised that the Machine Type of dhcp client, each network entity just can know the Machine Type of this dhcp client, thus performs relevant traffic engineering or policy control.
Description
Technical field
The present invention relates to communication network, particularly relate to Centralized Wireless LAN (centralizedWLAN).
Background technology
The appearance of Centralized Wireless LAN structure make operator can dispose controlled, can manage, the WiFi network of renewable electricity, wherein, in this Centralized Wireless LAN network structure, by an access controller (Access Controller, AC) be in charge of and control one or more wireless termination point (Wireless Termination Points, or access point (Access Point, AP) WTPs).In addition, the appearance of the subscriber equipmenies such as such as smart mobile phone occupies the flow of 3G network in a large number, and from a comparatively effective viewpoint, the flow of 3G network being unloaded to WiFi network is a preferably scheme.In fact, increasing smart phone user has also begun through the approach access network business of WiFi network.
Usually, operator, there are the demand of the Machine Type of the client identifying access WiFi network in such as telecom operators, also be that access controller or WLAN IAD (WLANAccess Gateway) need to know the client of which kind of Machine Type (such as, dual-mode handset, personal digital assistant, notebook computer, desktop computer etc.) be connected to this WiFi network, thus make each network entity can perform relevant traffic engineering and policy control.Such as, in the different periods, same usim card may be inserted into dual-mode handset and notebook computer respectively, like this, access controller or WLAN IAD need the client of this usim card of insertion distinguishing current this WiFi network of access to be dual-mode handset or notebook computer, thus determine to carry out transmission medium flow with different bit rates or screen resolution.
At present, operator can carry out identify customer end according to different IP address pool be from which access network (such as GPRS, 3G or WLAN), but but cannot distinguish the client which kind of Machine Type is this client be.
Therefore, provide one to contribute to each network entity, Ye Ji operator identifies that the scheme of the Machine Type of the client of access Centralized Wireless LAN is in the urgent need to being resolved.
Summary of the invention
Consider based on above-mentioned, in one embodiment of the invention, the DHCP request message that dhcp client is sent to Dynamic Host Configuration Protocol server comprises the Machine Type information of this dhcp client, and Dynamic Host Configuration Protocol server can determine the Machine Type of dhcp client according to the Machine Type information in the DHCP request message received.Once Dynamic Host Configuration Protocol server knows the Machine Type of the dhcp client of this Centralized Wireless LAN of access, each network entity just can know the Machine Type of this dhcp client, thus performs relevant traffic engineering or policy control.
Provide in one embodiment of the present of invention a kind of in the dhcp client of Centralized Wireless LAN for sending the method for DHCP request message to Dynamic Host Configuration Protocol server, it is characterized in that, said method comprising the steps of: the Machine Type information of described dhcp client is filled in described DHCP request message by a., wherein, described DHCP request message is used for described Dynamic Host Configuration Protocol server request configuration information; B. the described DHCP request message being filled with described Machine Type information is sent to described Dynamic Host Configuration Protocol server.
The present invention provide in another embodiment a kind of in the Dynamic Host Configuration Protocol server of Centralized Wireless LAN for receiving the method for the DHCP request message from dhcp client, it is characterized in that, said method comprising the steps of: i. receives the DHCP request message from described dhcp client, and wherein said DHCP request message comprises the Machine Type information of described dhcp client; Ii. according to described DHCP request message, the Machine Type of described dhcp client is determined.
By applying technical scheme of the present invention, Dynamic Host Configuration Protocol server can determine the Machine Type of dhcp client according to the Machine Type information in the DHCP request message received, like this, each network entity just can know the Machine Type of this dhcp client, thus performs relevant traffic engineering or policy control.
The present invention provide in one embodiment a kind of in the dhcp client of Centralized Wireless LAN for sending the sending module of DHCP request message to Dynamic Host Configuration Protocol server, it is characterized in that, described sending module comprises: filling device, for the Machine Type information of described dhcp client is filled in described DHCP request message, wherein, described DHCP request message is used for described Dynamic Host Configuration Protocol server request configuration information; Dispensing device, for being sent to described Dynamic Host Configuration Protocol server by the described DHCP request message being filled with described Machine Type information.
The present invention provide in another embodiment a kind of in the Dynamic Host Configuration Protocol server of Centralized Wireless LAN for receiving the receiver module of the DHCP request message from dhcp client, it is characterized in that, described receiver module comprises: receiving system, for receiving the DHCP request message from described dhcp client, wherein said DHCP request message comprises the Machine Type information of described dhcp client; First determining device, for according to described DHCP request message, determines the Machine Type of described dhcp client.
Various aspects of the present invention are more clear by the explanation by specific embodiment hereinafter.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, above-mentioned and other feature of the present invention will become more apparent:
Fig. 1 shows the form according to customer ID (Client Identifier) option in the DHCP request message of prior art;
It is the form that link layer address adds the DUID-LLT of time that Fig. 2 shows according to the type in the customer ID option of the DHCP request message of prior art;
Fig. 3 shows the form comprising the DUID-LLT of the new type field being used to indicate dhcp client Machine Type according to an embodiment of the invention; And
Fig. 4 show according to an embodiment of the invention in Centralized Wireless LAN for identifying the method flow diagram of the Machine Type of dhcp client.
In accompanying drawing, same or analogous mark is for representing same or analogous step or device.
Embodiment
In DHCPv6 agreement, dhcp client sends DHCP request message and is used for IP address requesting and other configuration parameters, such as subnet mask to Dynamic Host Configuration Protocol server, default gateway etc.Need to comprise a customer ID (Client Identifier) option in this DHCP request message, the DUID carried in this customer ID option (DHCP Unique Identifier) for this dhcp client of Dynamic Host Configuration Protocol server identification identity thus select corresponding configuration parameter for it.
Fig. 1 shows the form according to the customer ID option in the DHCP request message of prior art.In figure, " OPTION_CLIENT ID ", for representing that this option is customer ID option, length is 16 bits, is also 2 bytes." OPTION_LEN ", for representing the length of this customer ID option, length is 16 bits, is also 2 bytes." DUID " is DHCP unique identifier, and for identifying the identity of this dhcp client uniquely, the length of being somebody's turn to do " DUID " is variable.
Usually, " DUID " comprises the type codes that length is 2 bytes, for identifying the type of this DUID, and for the byte of the variable-length that forms real identifier content.Outside the type codes of removing 2 bytes, the length of whole " DUID " is generally no more than 128 bytes.
Hereinafter, be that link layer address adds the time (DUID-LLT) and is described for the type of " DUID " in customer ID option, one of ordinary skill in the art will appreciate that, technical scheme of the present invention " DUID " be applicable to equally in customer ID option is the situation of other types.
It is the form that link layer address adds the DUID-LLT of time that Fig. 2 shows according to the type in the customer ID option of the DHCP request message of prior art.
In figure, " type code " is type codes, and for representing the type of this DUID, length is 16 bits, is also 2 bytes.For the DUID adding time type based on link layer address, the type code is 1.
" hardware code ", for representing the kind of the network hardware, such as, Ethernet (Ethernet), length is 16 bits, is also 2 bytes.
" time ", for the Time interval that represents this DUID and produce from the time span of 0 on January 1st, 2000, unit is second, and length is 32 bits, also i.e. 4 bytes.
" link-layer address ", for representing when this DUID produces, be connected to the link layer address of any one network interface of this dhcp client, its length is variable.
For realizing technical scheme of the present invention, according to one embodiment of present invention, as shown in Figure 3, what be sent to Dynamic Host Configuration Protocol server at dhcp client defines a new type field for asking in the DUID in the customer ID option in the DHCP request message of configuration information, this new type field is used to indicate the Machine Type of dhcp client, such as dual-mode handset, personal digital assistant, notebook computer or desktop computer etc.
DUID shown in Fig. 3 is except comprising each territory of describing in Fig. 2, also comprise a new type field " machine type ", fill the Machine Type information of dhcp client in the type territory, be used to indicate the Machine Type of this dhcp client, length is 16 bits, is also 2 bytes.
It should be noted that, the length of this new type field " machine type " is not limited to 16 bits, also be 2 bytes, it can be other any byte lengths, such as, as long as enough identify various Machine Type and be no more than with the length sum in other each territories the maximum byte length that DUID allows, 128 bytes.
Hereinafter with reference to Fig. 4 and composition graphs 3 be described for the method for the Machine Type identifying dhcp client in Centralized Wireless LAN according to an embodiment of the invention.
As shown in Figure 4, first, in step S41, the Machine Type information of this client is filled in DHCP request message by dhcp client 10.
Preferably, the Machine Type information of this client is filled in customer ID (Client Identifier) option in DHCP request message by dhcp client 10.Such as, as shown in Figure 3, the Machine Type information of this client is filled in the new type field " machine type " in the DUID of customer ID option by dhcp client 10.
Preferably, the length of this Machine Type information is 16 bits, is also 2 bytes.
Then, in step S42, the DHCP request message of the Machine Type information being filled with this client is sent to Dynamic Host Configuration Protocol server 20 by dhcp client 10.
Concrete, the DHCP request message of the Machine Type information being filled with this client is sent to Dynamic Host Configuration Protocol server 20 by DHCPv6 agreement by dhcp client 10.
Then, in step S43, Dynamic Host Configuration Protocol server 20 receives the DHCP request message from dhcp client 10, and according to the Machine Type information that this DHCP request message comprises, determine the Machine Type of dhcp client 10, be such as dual-mode handset, personal digital assistant, notebook computer or desktop computer etc.
Concrete, after Dynamic Host Configuration Protocol server 20 receives the DHCP request message from dhcp client 10, from the DUID in the customer ID option this DHCP request message, extract machine type information, and according to extracted Machine Type information, determine the Machine Type of dhcp client 10.Once after Dynamic Host Configuration Protocol server 20 be realised that the Machine Type of dhcp client 10, each network entity just can know the Machine Type of this dhcp client 10, thus perform relevant traffic engineering or policy control.
Be more than description technical scheme of the present invention carried out from the angle of method step, below the angle from apparatus module be described further to technical scheme of the present invention.
First, the Machine Type information of this client is filled in DHCP request message by the filling device in the sending module in dhcp client 10.
Preferably, the Machine Type information of this client is filled in customer ID (Client Identifier) option in DHCP request message by filling device.Such as, as shown in Figure 3, the Machine Type information of this client is filled in the new type field " machine type " in the DUID of customer ID option by filling device.
Preferably, the length of this Machine Type information is 16 bits, is also 2 bytes.
Then, the DHCP request message of the Machine Type information being filled with this client is sent to Dynamic Host Configuration Protocol server 20 by the dispensing device in the sending module in dhcp client 10.
Concrete, the DHCP request message of the Machine Type information being filled with this client is sent to Dynamic Host Configuration Protocol server 20 by DHCPv6 agreement by dispensing device.
Then, receiving system in receiver module in Dynamic Host Configuration Protocol server 20 receives the DHCP request message from dhcp client 10, the Machine Type information that the first determining device in receiver module comprises according to this DHCP request message, determine the Machine Type of dhcp client 10, it is such as dual-mode handset, personal digital assistant, notebook computer or desktop computer etc.
Concrete, after receiving system receives the DHCP request message from dhcp client 10, extraction element in first determining device extracts machine type information from the DUID in the customer ID option this DHCP request message, then the second determining device in the first determining device, according to extracted Machine Type information, determines the Machine Type of dhcp client 10.
Once after Dynamic Host Configuration Protocol server 20 be realised that the Machine Type of dhcp client 10, each network entity just can know the Machine Type of this dhcp client 10, thus perform relevant traffic engineering or policy control.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the present invention.Any Reference numeral in claim should be considered as the claim involved by limiting.In addition, obviously " comprising " one word do not get rid of other unit or step, odd number does not get rid of plural number.Multiple unit of stating in system claims or device also can be realized by software or hardware by a unit or device.First, second word such as grade is used for representing title, and does not represent any specific order.
Claims (12)
1. in the dhcp client of Centralized Wireless LAN for sending a method for DHCP request message to Dynamic Host Configuration Protocol server, it is characterized in that, said method comprising the steps of:
A. be filled in described DHCP request message by the Machine Type information of described dhcp client, wherein, described DHCP request message is used for described Dynamic Host Configuration Protocol server request configuration information, and described Machine Type information is used for traffic engineering or policy control;
B. the described DHCP request message being filled with described Machine Type information is sent to described Dynamic Host Configuration Protocol server.
2. method according to claim 1, is characterized in that, described step a also comprises: described Machine Type information be filled in the customer ID option in described DHCP request message.
3. method according to claim 1 and 2, is characterized in that, the length of described Machine Type information is 16 bits.
4. in the Dynamic Host Configuration Protocol server of Centralized Wireless LAN for receiving a method for the DHCP request message from dhcp client, it is characterized in that, said method comprising the steps of:
I. receive the DHCP request message from described dhcp client, wherein said DHCP request message comprises the Machine Type information of described dhcp client;
Ii. according to described DHCP request message, determine the Machine Type of described dhcp client, described Machine Type information is used for traffic engineering or policy control.
5. method according to claim 4, is characterized in that, described step I i comprises the following steps:
I1. from the customer ID option described DHCP request message, described Machine Type information is extracted;
I2. according to extracted described Machine Type information, the Machine Type of described dhcp client is determined.
6. method according to claim 5, is characterized in that, described step I 1 also comprises: from the customer ID option described DHCP request message, extract described Machine Type information.
7. in the dhcp client of Centralized Wireless LAN for sending a sending module for DHCP request message to Dynamic Host Configuration Protocol server, it is characterized in that, described sending module comprises:
Filling device, for the Machine Type information of described dhcp client is filled in described DHCP request message, wherein, described DHCP request message is used for described Dynamic Host Configuration Protocol server request configuration information, and described Machine Type information is used for traffic engineering or policy control;
Dispensing device, for being sent to described Dynamic Host Configuration Protocol server by the described DHCP request message being filled with described Machine Type information.
8. sending module according to claim 7, is characterized in that, described filling device is also for being filled in described Machine Type information in the customer ID option in described DHCP request message.
9. the sending module according to claim 7 or 8, is characterized in that, the length of described Machine Type information is 16 bits.
10. in the Dynamic Host Configuration Protocol server of Centralized Wireless LAN for receiving a receiver module for the DHCP request message from dhcp client, it is characterized in that, described receiver module comprises:
Receiving system, for receiving the DHCP request message from described dhcp client, wherein said DHCP request message comprises the Machine Type information of described dhcp client;
First determining device, for according to described DHCP request message, determines the Machine Type of described dhcp client, and described Machine Type information is used for traffic engineering or policy control.
11. receiver modules according to claim 10, is characterized in that, described first determining device also comprises:
Extraction element, for extracting described Machine Type information from the customer ID option in described DHCP request message;
Second determining device, for according to extracted described Machine Type information, determines the Machine Type of described dhcp client.
12. receiver modules according to claim 11, is characterized in that, described extraction element also for extracting described Machine Type information from the customer ID option in described DHCP request message.
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