CN100466631C - Blank-interface text transmission method, network accessing apparatus and system - Google Patents

Blank-interface text transmission method, network accessing apparatus and system Download PDF

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Publication number
CN100466631C
CN100466631C CNB2006101617485A CN200610161748A CN100466631C CN 100466631 C CN100466631 C CN 100466631C CN B2006101617485 A CNB2006101617485 A CN B2006101617485A CN 200610161748 A CN200610161748 A CN 200610161748A CN 100466631 C CN100466631 C CN 100466631C
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message
network
layers
blank
terminal
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CN1980193A (en
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徐子振
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • Y10S370/907—Synchronous optical network, SONET

Abstract

The invention includes steps: terminal sends aerial port message of using Internet protocol IP in concourse sublayer (CS) to network access facility (NAF); NAF removes media access layer MAC of aerial port in aerial port message received from terminal, and adds two layer capsulation of network protocol so as to form message, which is sent to backbone network, of fixed network; in capsulation of data link layer, two layers information at source end facility fills in two layers information of NAF. Transmission method of aerial port message in an instance disclosed in the invention includes procedures: removing two layer capsulation of fixed network protocol in fixed network message received from backbone network, and adding aerial MAC of using IP CS, NAF sends it to terminal. The invention also discloses network access facility and system. The invention expands service range of terminal.

Description

The transmission method of blank-interface text, network access equipment and system
Technical field
The present invention relates to the message transmissions technology of the communications field, particularly a kind of transmission method of blank-interface text, network access equipment and system.
Background technology
WiMAX based on the IEEE802.16 standard satisfies the wireless metropolitan area network technology that last mile of ＂ ＂ inserts in the communication network, it can either satisfy transmission market, big, medium-sized and small enterprises inserts and the outdoor utility of family's access, also can satisfy family and individual's indoor application, it can either satisfy fixing WiMAX and insert the portable access of low speed in also can satisfying.On technical standard, solved the problem aspect physical layer environment (outdoor radio frequency transmission) and the service quality (QoS) two so that the WiMAX product can outdoor and indoor application, can carry out that data insert and the real-time requirement than higher speech and video traffic.
The IEEE802.16 standard definition physical layer and medium Access Layer (MAC).They are the data transmission formats according to the characteristic definition of eating dishes without rice or wine to transmit data, are different with the physical layer in the fixed network ICP/IP protocol and the definition of MAC layer.Wherein, physical layer mainly is that data are carried out modulation, and multiple modulation systems such as OFDMA are supported in processing such as encoding and decoding.The MAC layer is subdivided into convergence sub-layer (CS layer), common part sublayer (CPS layer) and Security Sublayer again.
In the MAC layer, the CS layer has mainly been described the forming process of several formation MAC service data units (SDU), can be connected with the IP layer that comprises IPV4 and IPV6 with ethernet layer.Because the superstructure difference that CS connects, CS can be divided into two kinds of IP CS and ETH CS.For IP CS, the payload user data of MAC layer (payload) is only inserted the IP message, directly the bearing IP packet data; For ETH CS, the payload of MAC layer inserts the Ethernet message, carrying Ethernet message data.
The CPS layer has mainly been described the forming process of Medium Access Control (MAC) Protocol Data Unit (PDU), and the MAC management function and the service that provide, mainly contain: uplink scheduling service, bandwidth request mechanism, contention scheme, network registry and initialization, search, renewal channel descriptor parameter, SS added processes such as multicast group and QOS.Security Sublayer is that data are carried out encryption and decryption.
Because the CS layer adopts different technology, feasible message according to the IEEE802.16 standard transmission may be the IP message that directly carries by air protocol, also may be the Ethernet message by the air protocol carrying.
When adopting IP CS technology, because the direct bearing IP packet of air protocol, therefore arrive two layers of information that do not have in the message of network access equipment in the fixed network agreement.When this message need transmit by backbone network, and backbone network is when adopting protocol transmission data such as TCP/IP or ATM, prior art does not provide the mode of filling in two layers of information in the corresponding fixed network agreement, so network access equipment can't send to the blank-interface text that receives on the backbone network and transmits.
The problems referred to above are described for a specific example.DHCP (DHCP) proposes on Bootstrap Protocol (BOOTP) basis, and its effect is to provide configuration information to the Internet main frame in the TCP/IP network.DHCP adopts client (Client)/server (Server) pattern, proposes configuration application (comprising parameters such as IP address allocated, subnet mask, default gateway) by user end to server, and server returns corresponding configuration information according to strategy.The DHCP message adopts UDP to encapsulate as transport layer protocol.
If subscriber station (SS) and base station (BS) adopt IPCS on eating dishes without rice or wine, SS will dynamically obtain the IP address, needs to initiate dhcp process.The DHCP message has only the IP message part when transmitting on eating dishes without rice or wine, do not have two layers of information of TCP/IP; And the BS network side adopts Ethernet, and the message bearing mode is to utilize Ethernet bearing IP message, like this, because the DHCP message that receives does not have two layers of information, therefore according to existing protocol, BS can't fill source MAC, the DHCP message can not be sent on the Ethernet to transmit.
Not only can there be the problems referred to above for the DHCP message, need the message of two layers of information of fixed network agreement for other, as ARP(Address Resolution Protocol), Reverse Address Resolution Protocol (RARP) etc., when these messages are adopting when transmitting between the WiMAX terminal of IP CS and backbone device, all similar problem can appear.Certainly, the fixed network agreement also not only is confined to ICP/IP protocol, during for the above-mentioned message of transmission in other fixed networks such as ATM, also has identical problem.
As seen, when adopting IP CS, the WiMAX terminal sends blank-interface text behind network access equipment, when if this message need transmit in the backbone network of supporting the fixed network agreement, network access equipment this message can't be converted to comprise correct two layers of information the fixed network message transmissions in backbone network, greatly limited the business of WiMAX terminal and carried out.
Summary of the invention
In view of this, the method and system that the embodiment of the invention provides a kind of blank-interface text to be converted to the conversion of fixed network message can be expanded the type of service that the WiMAX terminal is supported.
The embodiment of the invention also provides a kind of fixed network message to be converted to the method and system of blank-interface text, can realize expanding the type of service that the WiMAX terminal is supported.
The embodiment of the invention also provides a kind of network access equipment, can realize the conversion of blank-interface text and fixed network message.
For achieving the above object, the embodiment of the invention adopts following technical scheme:
A kind of transmission method of blank-interface text comprises:
When terminal when backbone network sends message, terminal will adopt the blank-interface text of Internet protocol IP convergence sub-layer CS to send to network access equipment, fill in two layers of information when transmitting this IP message in the fixed network in two layers of information of the IP message in blank-interface text; Network access equipment receives the blank-interface text of self terminal, extract IP message wherein, two layers of encapsulation of stamping the fixed network agreement send to backbone network behind the formation fixed network message, in described two layers of encapsulation, two layers of information of source end equipment are filled in two layers of information of network access equipment;
When backbone network when terminal sends message, network access equipment will receive two layers of encapsulation removing the fixed network agreement from the fixed network message of backbone network, and the IP message is encapsulated in the blank-interface text, send to terminal, eat dishes without rice or wine to adopt IP CS.
A kind of network access equipment comprises: terminal interface unit, uplink conversion unit, network side interface unit and descending converter unit, wherein,
Described terminal interface unit be used for the blank-interface text of the employing IP CS that receiving terminal sends, and the blank-interface text that described descending converter unit is sent sends to terminal;
Described uplink conversion unit, be used for extracting the IP message of the blank-interface text that described terminal interface unit receives, and two layers of encapsulation of stamping the fixed network agreement, send to described network side interface unit after forming the fixed network message, in described two layers of encapsulation, two layers of information of source end equipment are filled in two layers of information of network access equipment self;
Described network side interface unit is used to receive the fixed network message that backbone network sends, and also is used for the fixed network message that described uplink conversion unit sends is sent to backbone network;
Described descending converter unit is used for the fixed network message that described network side interface unit receives is removed two layers of encapsulation of fixed network agreement, and extraction IP message is encapsulated in and sends to described terminal interface unit in the blank-interface text, eats dishes without rice or wine to adopt IP CS.
A kind of blank-interface text is converted to the system of fixed network message, comprises terminal, network access equipment and backbone network, wherein,
Described terminal is used for adopting the blank-interface text of IP CS to send to described network access equipment, fills in two layers of information when transmitting this message in the fixed network in two layers of information of the IP message in blank-interface text; Also be used to receive the blank-interface text that described network access equipment sends, eat dishes without rice or wine to adopt IP CS;
Described network access equipment, be used for receiving the blank-interface text of self terminal to extract the IP message, two layers of encapsulation of stamping the fixed network agreement send to described backbone network behind the formation fixed network message, in described two layers of encapsulation, two layers of information are filled in two layers of information of network access equipment; The fixed network message that also is used for being received from described backbone network removes two layers of encapsulation of fixed network agreement, extracts the IP message and is encapsulated in and sends to described terminal in the blank-interface text, eats dishes without rice or wine to adopt IP CS.
As seen from the above technical solution, in embodiments of the present invention, when between terminal and backbone network, pass message mutually by network access equipment, and the interface between terminal and network access equipment is when eating dishes without rice or wine, on the up direction of message, terminal is filled in two layers of information when transmitting this message in the fixed network in two layers of information of the IP message of eating dishes without rice or wine, it is packaged into to adopt the air protocol message of IP CS to send to network access equipment then; After network access equipment receives blank-interface text, extract the IP message, two layers of encapsulation of stamping the fixed network agreement are mail to backbone network thereby blank-interface text is converted to the fixed network message.Particularly, two layers of information utilizing network access equipment in two layers of encapsulation are as two layers of information in the data link layer, also promptly by network access equipment as the message that comprises two layers of information between the fixed network agency of terminal and backbone network alternately.On the down direction of message, network access equipment receives the fixed network message that backbone network sends, and removes two layers of encapsulation of fixed network agreement, and extraction IP message is encapsulated in and sends to terminal in the blank-interface text, and eats dishes without rice or wine to adopt IP CS.By the embodiment of the invention, promptly can finish the mutual conversion between fixed network message and blank-interface text, make the WiMAX terminal can carry out fixed network services, greatly expand the scope of business of WiMAX terminal.
Description of drawings
Fig. 1 is the transmission method particular flow sheet of blank-interface text on the up direction in the embodiment of the invention.
Fig. 2 is the transmission method particular flow sheet of blank-interface text on the down direction in the embodiment of the invention.
The transmission system concrete structure figure of the blank-interface text that provides in the embodiment of the invention is provided Fig. 3.
The concrete structure figure of the network access equipment that provides in the embodiment of the invention is provided Fig. 4.
Embodiment
For the purpose, technological means and the advantage that make the embodiment of the invention is clearer, the embodiment of the invention is described in further detail below in conjunction with accompanying drawing.
The basic thought of the embodiment of the invention is: when terminal when network side sends message, terminal is filled in two layers of information when transmitting this message in the fixed network in two layers of information of IP message, and this message is packaged into adopts the blank-interface text of IP CS to send to network access equipment, network access equipment extracts the IP message after receiving uplink message, stamp two layers of encapsulation of fixed network agreement, thereby realize that blank-interface text is converted to the fixed network message; When network side when terminal sends message, on the down direction of message, network access equipment receives downlink message, and removes two layers of encapsulation of fixed network agreement, the IP message is encapsulated in the blank-interface text that adopts IP CS sends to terminal, thereby realize that the fixed network message is converted to blank-interface text.
Therefore on the up direction of the embodiment of the invention, the transmission method overall procedure of blank-interface text may further comprise the steps:
Step 1, terminal will adopt the blank-interface text of Internet protocol IP convergence sub-layer CS to send to network access equipment, fill in two layers of information when transmitting this message in the fixed network in two layers of information of the IP message content of eating dishes without rice or wine.
In message, fill two layers of information, can guarantee that this message arrives the destination device (as server) of backbone network after, this destination device can correctly be discerned the different terminals that sends message.
Step 2, network access equipment receive the blank-interface text of self terminal, extract two layers of encapsulation that IP message is wherein stamped the fixed network agreement, send to backbone network after forming the fixed network message, two layers of information that two layers of information in two layers of encapsulation are filled in network access equipment.
Ethernet is the double layer network technology at present most widely used a kind of ICP/IP protocol, and when backbone network adopted Ethernet, the IP message need be stamped the Ethernet encapsulation.Source MAC in the Ethernet encapsulation is filled in the MAC Address relevant with network access equipment, particularly, it can be the MAC Address of this network access equipment self, ethernet address as base station (BS), also can be the MAC Address in the ethernet mac address pond of presetting in this network access equipment, as the ethernet address in the ethernet mac address pond of BS.Difference according to selecting the MAC Address mode can be divided into two kinds with choosing of source MAC, is respectively 1:1 MAC and N:1 MAC.1:1 MAC is meant, for the message of same network access equipment to backbone network forwarding different terminals, selects different ethernet source MAC Address, is specially the different ethernet mac address of selection from the address pool of this network access equipment; N:1 MAC is meant, for the message of same network access equipment to backbone network forwarding different terminals, selects identical ethernet source MAC Address, is specially the ethernet mac address that adopts this network access equipment oneself.
On the down direction of the embodiment of the invention, the overall procedure of transmission blank-interface text comprises:
Network access equipment will receive two layers of encapsulation removing the fixed network agreement from the fixed network message of backbone network, stamp and eat dishes without rice or wine to send to terminal after the encapsulation, eat dishes without rice or wine to adopt IP CS.
When blank-interface text and fixed network message are changed mutually, according to the difference of concrete message, the fill substance of message with and the business field of using also inequality.Between terminal and backbone network, be example alternately with the DHCP message below, the embodiment of conversion method, network access equipment and the network system of blank-interface text of the present invention and fixed network message is described.
Fig. 1 is the transmission method particular flow sheet of blank-interface text on the up direction in the embodiment of the invention.In the present embodiment, terminal is for obtaining configuration information, and the Dynamic Host Configuration Protocol server in backbone network sends the DHCP message, the configuration application is proposed, two layers of transmission of backbone network adopt the Ethernet that meets ICP/IP protocol to carry out, and network access equipment is specially base station (BS), and terminal is specially subscriber station (SS).In ICP/IP protocol, two layers are data link layer.As shown in Figure 1, this method comprises:
Step 101, SS fills in the DHCP message.
According to the regulation of DHCP agreement, DHCP message format territory is described as shown in table 1.Promptly all DHCP messages all will meet the form of this table, fill in the DHCP message content.
Field Length (byte) Describe
Op 1 Message op code/message type (type of message) 1 BOOTREQUEST 2 BOOTREPLY
Htype 1 Hardware address type (hardware address type), 1 expression Ethernet, this and ARP ask or reply in the implication represented of field of the same name identical.
Hlen 1 Hardware address length (hardware address length), 6 bytes.
Hops 1 Jumping figure, Client is set to 0, also can be by an acting server setting
Xid 4 Transaction ID by the random number that Client selects, is used for the coupling of mutual message between Server and the Client.
Secs 2 Seconds (second number) is filled by Client, begins address acquisition or address from Client and renews second number that has used the back.
Flags 2 B: leftmost bit, Broadcast flag; MBZ: remaining bits gives in the future and uses for keeping the position.
Ciaddr 4 Client IPaddress, having only Client is BOUND, RENEW, REBINDING state, and can respond ARP requests the time, just can be filled.
Yiaddr 4 ' your ' be IP address (Client)
Siaddr 4 Among the bootstrap, the IP address of next Server is filled in Offer and ACK message by Server.
Giaddr 4 Use when carrying out message interaction by Relay Relay agency's IP address.
Chaddr 16 Client hardware address, client must be provided with its " client's hardware address " field.
Sname 64 " server host name " field is that a null value stops string, is filled in by server.
File 128 Boot file name is that a null value stops string.Among the DHCPDISCOVER " generic " name or null character (NUL); DHCPOFFER provides effective directory path full name.
Options Var The optional parameters territory, the option list of definition.Introduced the definition of whole option among the RFC2132.
Table 1
Because the DHCP message utilizes ICP/IP protocol to carry out when backbone network transmits, so in the DHCP message shown in the table 1, the data link layer information that ＂ chaddr ＂, ＂ htype ＂ and three fields of ＂ hlen ＂ need be filled in the terminal ICP/IP protocol stack that sends to the DHCP message.Particularly, stipulate in the present embodiment that ＂ chaddr ＂ field is filled in the MAC Address (SSID) of this terminal when dispatching from the factory, ＂ htype ＂ field is filled out one writing and is represented Ethernet, and ＂ hlen ＂ field is filled in the MAC Address byte length of SS, i.e. " 6 ".After filling in the DHCP message content according to aforesaid way, Dynamic Host Configuration Protocol server just can be according to the different terminal of data link layer information Recognition in the message.
Step 102 is stamped encapsulation with the DHCP original message, forms the IP message.
The DHCP message filled in of mode shown in 101 adopts UDP to encapsulate as transport layer protocol set by step.When breaking into the UDP bag, the UDP source port number that SS mails to the DHCP message of Dynamic Host Configuration Protocol server is 67, and the UDP source port number that Dynamic Host Configuration Protocol server mails to the DHCP message of SS is 68.Then, again the UDP bag is stamped the IP encapsulation, form the IP message.
Step 103, terminal is stamped the MAC encapsulation formation blank-interface text of eating dishes without rice or wine with the IP message of DHCP message and is sent to BS, wherein, eats dishes without rice or wine to adopt IP CS.
In the present embodiment, the MAC layer of eating dishes without rice or wine adopts IP CS, therefore can directly carry the IP bag of DHCP message, sends to BS by eating dishes without rice or wine.
Step 104, BS receives the DHCP message by eating dishes without rice or wine, and extracts IP message wherein, stamps the data link layer encapsulation, sends to the Dynamic Host Configuration Protocol server in the backbone network behind the formation fixed network message.
In the present embodiment, backbone network adopts Ethernet to transmit, so the data link layer encapsulation is specially the Ethernet encapsulation.In this step, BS extracts IP bag wherein after eating dishes without rice or wine to receive the DHCP message, add the Ethernet encapsulation.
Wherein, the selection of ethernet address can be adopted the mode of 1:1 MAC or N:1 MAC.If adopt the mode of 1:1 MAC, then from the ethernet mac address pond that BS sets in advance, select ethernet mac address as the source MAC in the DHCP message Ethernet frame head, in this case, the DHCP message of transmitting different SS by same BS is assigned with different ethernet address.If adopt the mode of N:1 MAC, then with the ethernet address of BS as the source MAC in the Ethernet frame head of DHCP message, in this case, the DHCP message of being transmitted different SS by same BS is assigned with identical ethernet address.No matter adopt the mode of 1:1 MAC or N:1 MAC, BS is all as the ARP proxy of SS, and the fixed network message of DHCP is sent to Dynamic Host Configuration Protocol server in the backbone network.
The DHCP message that Dynamic Host Configuration Protocol server receives the BS transmission is identical with message of the prior art, according to its message content, returns the DHCP message that carries configuration information to SS, and this message will at first send to BS.
Fig. 2 is the transmission method particular flow sheet of blank-interface text on the down direction in the embodiment of the invention.The above-mentioned DHCP message that sends to SS by Dynamic Host Configuration Protocol server need be used this method and finish the message conversion.As shown in Figure 2, this method comprises:
Step 201, BS receives the DHCP message that Dynamic Host Configuration Protocol server sends, and the data link layer encapsulation of this message is removed, and takes out the IP bag.
In this step, the DHCP message is encapsulated in the ethernet frame and is sent by Dynamic Host Configuration Protocol server, because in the present embodiment, BS need send to SS with the DHCP message by eating dishes without rice or wine, eat dishes without rice or wine to transmit IP message (IP CS), therefore BS will at first remove the Ethernet encapsulation of DHCP message, takes out the IP message.
Step 202 is stamped the MAC encapsulation of eating dishes without rice or wine with the IP message and is formed blank-interface text, sends to SS, wherein, eats dishes without rice or wine to adopt IP CS.
In this step because the MAC layer of eating dishes without rice or wine adopts IP CS, therefore with the IP bag directly as the MAC layer payload of eating dishes without rice or wine, after stamping the MAC that eats dishes without rice or wine and encapsulating, mail to SS by eating dishes without rice or wine.
The above-mentioned method embodiment of conversion mutually that is between the blank-interface text that provides in the embodiment of the invention and fixed network message.By the way, promptly can finish the blank-interface text of DHCP and the mutual conversion between the fixed network message.Like this, the WiMAX terminal just can be utilized DHCP message application configuration, has expanded the type of service that the WiMAX terminal is supported.The embodiment of network access equipment and network system also is provided in the present embodiment, can be used to implement said method.
The concrete structure figure of the blank-interface text transmission system that provides in the embodiment of the invention is provided Fig. 3.As shown in Figure 3, this network system comprises: terminal 310, network access equipment 320 and backbone network 330.
With reference to the concrete condition in the present embodiment, terminal 310 can be embodied as SS in this network system, and network access equipment 320 can be embodied as BS, and backbone network 330 can be embodied as Ethernet, and also comprises Dynamic Host Configuration Protocol server 331 in backbone network 330.
Particularly, in this system, terminal 310, be used for and adopt the DHCP blank-interface text of IP CS to send to network access equipment 320, in this DHCP message, two layers of information when two layers of information extends this as this message of transmission in the Ethernet, particularly, ＂ chaddr ＂ field is filled in the MAC Address (SSID) of this terminal that is provided with when dispatching from the factory, ＂ htype ＂ field is filled out one writing and is represented Ethernet, ＂ hlen ＂ field is filled in the byte length that the terminal MAC Address takies, i.e. and " 6 ", expression terminal MAC Address length is 6 bytes.Terminal 310 also is used to receive the DHCP blank-interface text of the employing IP CS that network access equipment 320 sends, carries the configuration information that Dynamic Host Configuration Protocol server returns in this DHCP blank-interface text.
Network access equipment 320 is used for receiving the DHCP blank-interface text of self terminal 310 to remove the MAC encapsulation of eating dishes without rice or wine, and extracts the IP message, stamps and sends to backbone network 330 after Ethernet encapsulates, and specifically sends in the Dynamic Host Configuration Protocol server 331.In the encapsulation of the Ethernet of this DHCP message, the source ethernet mac address is filled in the ethernet mac address relevant with network access equipment 331, and choosing of this relevant MAC Address can be adopted 1:1 MAC or N:1 MAC mode.This network access equipment 320 also is used for removing the Ethernet encapsulation and extracting the IP message receiving DHCP fixed network message from backbone network 330 Dynamic Host Configuration Protocol server 331, stamps and eats dishes without rice or wine to send to terminal 310 after the MAC encapsulation, eats dishes without rice or wine to adopt IPCS.
In said system, the concrete structure of network access equipment 320 comprises as shown in Figure 4: terminal interface unit 321, uplink conversion unit 322, network side interface unit 323 and descending converter unit 324.
In this network access equipment 320, terminal interface unit 321 be used for the DHCP blank-interface text of the employing IP CS that receiving terminal 310 sends, and the blank-interface text that descending converter unit 324 is sent sends to terminal 310.
Uplink conversion unit 322, be used for extracting the IP message of the blank-interface text that terminal interface unit 321 receives, and stamp Ethernet encapsulation, send to network side interface unit 323 after forming the fixed network message, in the Ethernet encapsulation, the source ethernet mac address is filled in the MAC Address relevant with network access equipment, and the mode of choosing of this ethernet mac address can adopt 1:1 MAC or N:1 MAC mode.
Network side interface unit 323 is used for receiving the DHCP fixed network message that backbone network 330 Dynamic Host Configuration Protocol server 331 send, and the DHCP fixed network message that is used for that also uplink conversion unit 322 is sent sends to the Dynamic Host Configuration Protocol server 331 of backbone network 330.
Descending converter unit 324 is used for the DHCP fixed network message that network side interface unit 323 receives is removed the Ethernet encapsulation, stamps the MAC encapsulation of eating dishes without rice or wine, and forms blank-interface text and sends to terminal interface unit 321, wherein, eats dishes without rice or wine to adopt IP CS.
In above-mentioned network access equipment 320, can further include ethernet mac address pond memory cell, be used to store ethernet mac address; Uplink conversion unit 322 is further used for extracting ethernet mac address as the source MAC in the Ethernet encapsulation from the memory cell of ethernet mac address pond.
The above-mentioned system that the embodiment of the invention provides and the embodiment of network access equipment of being.In the present embodiment, SS can adopt various forms, as portable terminal (MS) etc.
In an embodiment of the present invention, realized normal transmission between the Dynamic Host Configuration Protocol server of DHCP message in WiMAX terminal and Ethernet, make and eat dishes without rice or wine to adopt IP CS, utilize IEEE802.16e carrying DHCP message, data link layer information in the DHCP message still can be filled, and Dynamic Host Configuration Protocol server still can be according to the different terminal of data link layer information Recognition in the DHCP message.Simultaneously, eat dishes without rice or wine to adopt IP CS, the BS network side adopts Ethernet, can realize the intercommunication of IEEE802.16e carrying DHCP message and Ethernet bearing DHCP message.Based on above-mentioned change, allow the BS network side to adopt Ethernet, eat dishes without rice or wine to adopt under the situation of IP CS, carry out the business relevant with Ethernet.
In the above-described embodiments, all, the specific embodiment of the present invention is described with the example that is transmitted as of DHCP message at ethernet device and WiMAX terminal room.In actual applications, need the message of two layers of information in the fixed network protocol stack for other, as ARP(Address Resolution Protocol), Reverse Address Resolution Protocol (RARP) etc., when these messages are adopting when transmitting between the WiMAX terminal of IP CS and backbone device, the mode described in the embodiment of the invention of can using is equally transmitted, thereby makes the WiMAX terminal can support the business of utilizing these messages to carry out; In addition, backbone network also not only is confined to meet the Ethernet of TCP/IP, can be the double layer network of supporting arbitrarily, as token-ring network, atm network etc., thereby realizes between the network of WiMAX terminal and different fixed network types the purpose of biography message mutually.When specifically carrying out the message conversion, similar with the mode of the embodiment of the invention, concrete message content difference to some extent when just transmitting, network access equipment is when two layers of encapsulation carrying out the fixed network agreement, at different double layer networks, encapsulate accordingly, other operating procedure is all identical, just repeats no more here.
In a word,, promptly can realize the transmission of blank-interface text, make the WiMAX terminal can carry out fixed network services, greatly expand the scope of business of WiMAX terminal by the embodiment of the invention.
Being preferred embodiment of the present invention only below, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1, a kind of transmission method of blank-interface text is characterized in that, this method comprises:
When terminal when backbone network sends message, terminal will adopt the blank-interface text of Internet protocol IP convergence sub-layer CS to send to network access equipment, fill in two layers of information when transmitting this IP message in the fixed network in two layers of information of the IP message in blank-interface text; Network access equipment receives the blank-interface text of self terminal, extract IP message wherein, two layers of encapsulation of stamping the fixed network agreement send to backbone network behind the formation fixed network message, in described two layers of encapsulation, two layers of information of source end equipment are filled in two layers of information of network access equipment;
When backbone network when terminal sends message, the fixed network message that network access equipment will be received from backbone network removes two layers of encapsulation of fixed network agreement, and the IP message is encapsulated in the blank-interface text, sends to terminal, eats dishes without rice or wine to adopt IP CS.
2, method according to claim 1 is characterized in that, when described backbone network was Ethernet, in the encapsulation of described Ethernet, the source ethernet mac address was filled in the ethernet mac address relevant with network access equipment;
The described ethernet mac address relevant with network access equipment is: the ethernet mac address of described network access equipment, perhaps, the MAC Address in the ethernet mac address pond that described network access equipment is preset.
3, method according to claim 1 and 2 is characterized in that, the message of described empty port load-supporting is dynamic host configuration protocol DHCP message, address analysis protocol message or RARP message.
4, method according to claim 1 is characterized in that, described backbone network is Ethernet, token-ring network or other double layer network.
5, method according to claim 1 and 2 is characterized in that, when described blank-interface text is the DHCP message, when described backbone network is Ethernet, fills in as follows in two layers of information that relate in described DHCP message:
In hardware address chaddr field, fill in the MAC Address of described terminal oneself,
In hardware address type htype field, fill in the code name of expression Ethernet,
In hardware address length hlen field, fill in described MAC Address byte length.
6, method according to claim 1 is characterized in that, described fixed network message is dynamic host configuration protocol DHCP message, address analysis protocol message or RARP message.
7, a kind of network access equipment is characterized in that, this network access equipment comprises: terminal interface unit, uplink conversion unit, network side interface unit and descending converter unit, wherein,
Described terminal interface unit be used for the blank-interface text of the employing IPCS that receiving terminal sends, and the blank-interface text that described descending converter unit is sent sends to terminal;
Described uplink conversion unit, be used for extracting the IP message of the blank-interface text that described terminal interface unit receives, and two layers of encapsulation of stamping the fixed network agreement, send to described network side interface unit after forming the fixed network message, in described two layers of encapsulation, two layers of information of source end equipment are filled in two layers of information of network access equipment self;
Described network side interface unit is used to receive the fixed network message that backbone network sends, and also is used for the fixed network message that described uplink conversion unit sends is sent to backbone network;
Described descending converter unit is used for the fixed network message that described network side interface unit receives is removed two layers of encapsulation of fixed network agreement, and extraction IP message is encapsulated in and sends to described terminal interface unit in the blank-interface text, eats dishes without rice or wine to adopt IP CS.
8, network access equipment according to claim 7 is characterized in that, when backbone network was Ethernet, described uplink conversion unit was used for the ethernet mac address of the network access equipment source MAC as the Ethernet encapsulation.
9, network access equipment according to claim 7 is characterized in that, when backbone network was Ethernet, this network access equipment further comprised ethernet mac address pond memory cell, is used to store ethernet mac address;
Described uplink conversion unit is further used for extracting ethernet mac address as the source MAC in the Ethernet encapsulation from the memory cell of described ethernet mac address pond.
10, a kind of blank-interface text is converted to the system of fixed network message, comprises backbone network, it is characterized in that, this system further comprises terminal and network access equipment, wherein,
Described terminal is used for adopting the blank-interface text of IP CS to send to described network access equipment, fills in two layers of information when transmitting this IP message in the fixed network in two layers of information of the IP message in blank-interface text; Also be used to receive the blank-interface text that described network access equipment sends, eat dishes without rice or wine to adopt IP CS;
Described network access equipment, be used for receiving the blank-interface text of self terminal to extract the IP message, two layers of encapsulation of stamping the fixed network agreement send to described backbone network behind the formation fixed network message, in described two layers of encapsulation, two layers of information are filled in two layers of information of network access equipment; The fixed network message that also is used for being received from described backbone network removes two layers of encapsulation of fixed network agreement, extracts the IP message and is encapsulated in and sends to described terminal in the blank-interface text, eats dishes without rice or wine to adopt IP CS.
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