CN1925467A - Method and device for message transmission - Google Patents
Method and device for message transmission Download PDFInfo
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- CN1925467A CN1925467A CNA2006101524989A CN200610152498A CN1925467A CN 1925467 A CN1925467 A CN 1925467A CN A2006101524989 A CNA2006101524989 A CN A2006101524989A CN 200610152498 A CN200610152498 A CN 200610152498A CN 1925467 A CN1925467 A CN 1925467A
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Abstract
This invention discloses one message report method, which comprises the following steps: when the interface linkage is available, establishing two layers of sealing information; when interface sends broadcast message, it sends the said message according to two layers of sealed message. The invention method is through establishing needed two layers of sealing information during sending process and the interface only needs sealed information to the message.
Description
Technical field
The present invention relates to data communication technology, refer to a kind of transmission method of message and device especially.
Background technology
In data communication, because multicast or broadcasting packet are a bit to send to a plurality of points, so the transmitting efficiency of message directly has influence on corresponding agreement implementation situation; For example concerning the route agreement, the transmission speed of multicast or broadcasting packet directly has influence on the constringency performance of Routing Protocol in the Routing Protocol, has determined to a great extent the execution efficient of Routing Protocol.
In the prior art, the network equipment is given the IP layer with multicast or broadcasting packet and is carried out transmission processing.The IP layer then sends according to the link protocol unit that the interface of application program appointment is given message under the interface.
The Linktype that interface is supported comprises three kinds of situations, for point-to-point link, put multipoint link and Ethernet broadcasting link.When the Linktype of supporting when the interface of application program appointment was point-to-point link, then application program was by specifying a plurality of support point point-to-point links to realize multicast or broadcasting.
Three kinds of Linktypes below supporting for interface respectively, the process that the link protocol unit is sent message is briefly introduced.Specific as follows:
The Linktype of supporting when interface is a point-to-point link, for example High-Level Data Link Control (HDLC) or peer-peer protocol (PPP) etc., and link protocol unit elder generation docking port carries out the correlated judgment of judgement of interface validity and Link State.When interface validity and relevant link state all satisfied condition, the link protocol unit was according to network layer protocol information and two layers of packaging information of link layer protocol information acquisition, and according to two layers of packaging information this message carried out two layers of encapsulation, sent the message after the encapsulation.Two layers of packaging information refer to, necessary information in the message encapsulation format of each link protocol regulation.
The Linktype of supporting when interface is point-to-multipoint link, such as frame relay FR (FrameRelay) or asynchronous transfer mode (ATM) etc., and link protocol unit elder generation docking port carries out the correlated judgment of the judgement of interface validity and Link State.In the situation that validity and the relevant link state of interface all satisfies condition, when if the link protocol unit finds that the current message that will send is multicast or broadcasting packet, then travel through all subchannels of this interface, send message at the subchannel with broadcast nature.Just, have on the subchannel of broadcast nature two layers of packaging information at each according to each subchannel of link layer protocol information acquisition of network layer protocol information and this subchannel, and message is carried out two layers of encapsulation according to two layers of packaging information of the subchannel that respectively has broadcast nature, send message after the encapsulation by each subchannel.
When the Linktype of interface support is the Ethernet broadcasting link, Ethernet (ETH) link etc. for example, link protocol unit elder generation docking port carries out interface validity and judges and the Link State correlated judgment.When the validity of interface and relevant link state all satisfy condition, if when finding that the current message that will send is multicast message, then calculate multicast purpose medium Access Controls (MAC) address according to multicast purpose IP, the MAC Address on the acquisition interface is as source MAC; If the current message that will send is broadcasting packet, then directly target MAC (Media Access Control) address is set to broadcast MAC Address, and the MAC Address on the acquisition interface is as source MAC.Obtain two layers of packaging information according to the link layer protocol information of network layer protocol information and this interface and the source/destination MAC Address that obtains, and according to two layers of packaging information this message is carried out two layers of encapsulation, send the message after encapsulating.
In the prior art, in the time will sending multicast or broadcasting packet, the link protocol unit at first needs docking port state and Link State to judge, determines whether to send message; But in definite Interface status and Link State time spent, obtain again two layers of packaging information of message according to network layer type and this Linktype, utilize after two layers of packaging information encapsulate message, multicast or broadcasting packet could be sent smoothly.As from the foregoing, in the prior art, message is after having specified transmission interface by application program, also need through a series of loaded down with trivial details message processing procedures, could send by interface, greatly reduce the transmitting efficiency of multicast or broadcasting packet like this, influenced the execution efficient of related service.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method and device that sends message, uses the transmitting efficiency that the method that the invention provides and device can improve multicast or broadcasting packet.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of method that sends message, carry out following steps:
But when link time spent corresponding to interface, set up two layers of packaging information of interface; When interface sends multicast or broadcasting packet, according to two layers of packaging information encapsulation of interface and send described message.
Preferable, when the Linktype of supporting when interface was point-to-point, the point-to-point link of described interface correspondence was available as:
After the link negotiation of the point-to-point link of successfully finishing the interface correspondence, described point-to-point link is available;
Described encapsulation also sends described message and is: two layers of packaging information according to described interface encapsulate described message, and send described message by point-to-point link corresponding to described interface.
Better, when point-to-point link corresponding to interface is unavailable, then delete two layers of packaging information corresponding to this interface;
Or, when the message encapsulation format of point-to-point link corresponding to interface changes, according to the message encapsulation format after changing described two layers of packaging information are made amendment.
Better, when the Linktype of supporting when interface was point-to-multipoint, described two layers of packaging information setting up interface were:
When a subchannel with broadcast nature of the every increase of point-to-multipoint link corresponding to interface, under this subchannel state is available situation, then set up two a layer packaging information corresponding with this interface for the subchannel of described increase;
Described encapsulation also sends described message and is: according to two layers of packaging information corresponding to each subchannel of described interface encapsulated messages respectively, and send described message by each subchannel.
Better, when subchannel corresponding to two layers of packaging information is unavailable, then delete this two layers of packaging information;
Or, when the message encapsulation format of the corresponding subchannel of two layers of packaging information changes, according to the message encapsulation format after changing described two layers of packaging information are made amendment.
Better, when the Linktype of supporting when interface was the Ethernet broadcasting link, described two layers of packaging information setting up interface were:
Be in the situation of virtual ethernet virtual interface at interface, in virtual ethernet corresponding to virtual interface, during the available two layers of port of one of every increase, then set up two a layer packaging information corresponding with virtual interface for these two layers of ports;
Described encapsulation also sends described message and is: according to two layers of packaging information corresponding to each two layers of port of described interface encapsulated messages respectively, and send described message by each two layers of port;
Or, be in the situation of three layers of Ethernet interface at interface, but when the state of Ethernet broadcasting link corresponding to three layers of Ethernet interface be the time spent, set up three layers of two layers of packaging information that Ethernet interface is corresponding;
Described encapsulation also sends described message and is: two layers of packaging information according to described three layers of Ethernet interface encapsulate described message, and send described message by described three layers of broadcasting link corresponding to Ethernet interface.
Better, before encapsulation and sending described message, further comprise:
When described message is multicast message, obtain the target MAC (Media Access Control) address of multicast message according to purpose IP address computation;
Purpose media access control MAC address and two layers of packaging information according to multicast message encapsulate and send described multicast message;
Or when described message was broadcasting packet, the target MAC (Media Access Control) address of described message was set to the broadcasting MAC Address of broadcasting packet;
Target MAC (Media Access Control) address and two layers of packaging information according to multicast message encapsulate and send described broadcasting packet.
Better, when interface is the virtual ethernet virtual interface, when two layers of port corresponding to two layers of packaging information are unavailable, then delete this two layers of packaging information; Or when the message encapsulation format of two layers of port corresponding to two layers of packaging information changes, according to the message encapsulation format after changing described two layers of packaging information are made amendment;
Perhaps, when interface is three layers of Ethernet interface, when Ethernet broadcasting link corresponding to three layers of Ethernet interface is unavailable, then delete two layers of packaging information corresponding to this interface; Or when the message encapsulation format of Ethernet broadcasting link corresponding to interface changes, according to the message encapsulation format after changing described two layers of packaging information are made amendment.
Better, carry out described operation of setting up two layers of packaging information by the link protocol unit.
Preferable, the interface link admin table is set, be used for the corresponding relation between record interface and the corresponding two layers of packaging information.
In addition, the present invention also provides a kind of device that sends message, and this device comprises at least, link protocol unit and link information unit; Wherein,
The link protocol unit is used for setting up two layers of packaging information of interface, and is recorded in the link information unit; When sending multicast or broadcasting packet, according to two layers of packaging information encapsulation of the interface of record and send described message;
The link information unit is used to write down two layers of packaging information of the interface that link protocol element sets up.
A kind of method that sends message provided by the present invention, two layers of packaging information required and that before message sends, just can determine in process of transmitting by record multicast or broadcasting packet; And then when reality sends message, interface only need to encapsulate and send described message according to two layers of packaging information of record, and then reduced each multicast or broadcasting packet in process of transmitting the judgement link and two layers of packaging information the link such as obtain, thereby reached the purpose of quick transmission multicast or broadcasting packet.Simultaneously, the present invention also provides a kind of device that sends message.By using method provided by the present invention and device, the transmitting efficiency of multicast or broadcasting packet can be provided to a great extent, and then also improve the execution efficient of related service.
Description of drawings
Fig. 1 is the flow chart of the embodiment of the invention one method;
Fig. 2 is the flow chart of the embodiment of the invention two methods;
Fig. 3 is the flow chart of the embodiment of the invention three methods;
Fig. 4 is the structure chart of apparatus of the present invention;
Fig. 5 is the interface link management list item structure chart during a plurality of two layers of packaging information for the present invention exists.
Embodiment
Core concept of the present invention is: but when the interface link corresponding time spent, required and two layers of packaging information that before message sends, just can determine in process of transmitting at available link record multicast or broadcasting packet; When reality sends message, two layers of packaging information according to record encapsulate and send described message, and then reduced each multicast or broadcasting packet in process of transmitting the judgement link and two layers of packaging information link such as obtain, reached the purpose of quick transmission multicast or broadcasting packet.
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.
In the present invention, be primarily aimed at three kinds of Linktypes and enumerate embodiment respectively, these three kinds of Linktypes are respectively: point-to-point link, put multipoint link and Ethernet broadcasting link.
Embodiment one
When the Linktype of interface support was point-to-point, then the flow process of present embodiment transmission message method may further comprise the steps as shown in Figure 1:
Step 101: the link protocol unit that interface is corresponding, but be the time spent when point-to-point link state corresponding to front port, set up two layers of packaging information working as front port according to the point-to-point link that interface is corresponding.
Here determine that the interface link state is that available method can be: the link protocol unit is completing successfully after the link protocol of the point-to-point link of front port correspondence is consulted, and the state of determining current point-to-point link is available.
Here, the link protocol unit is after link protocol is consulted successfully, according to the network layer protocol information of point-to-point link and two layers of packaging information of link layer protocol information building of correspondence.
Step 102: receive multicast or the broadcasting packet that needs interface to send when interface link corresponding protocol element, the link protocol unit then encapsulates message according to two layers of packaging information when the front port correspondence, and by multicast or broadcasting packet after the point-to-point link transmission encapsulation of front port correspondence.
The method of present embodiment further comprises, becomes when unavailable at the state when the point-to-point link of front port correspondence, leaves out two layers of packaging information of this interface correspondence.After this, when front port can not send multicast or broadcasting packet again, until Link State is available.Perhaps, when the message encapsulation format of point-to-point link corresponding to this interface changes, then upgrade when two layers of packaging information corresponding to front port according to the message encapsulation format after changing.
Embodiment two
When the Linktype of interface support when being point-to-multipoint, such as FR or ATM, the flow process that then sends message at interface may further comprise the steps as shown in Figure 2:
Step 201: the link protocol unit will increase a subchannel with broadcast nature at the interface of self managing, but and be the time spent at the state of this subchannel, the two layer packaging information corresponding with this interface are set up at the subchannel of current increase in the link protocol unit.
Here, two layers of packaging information of subchannel are set up in the link protocol unit according to the link layer protocol information of network layer protocol information and this subchannel.
Wherein, the subchannel of indication is data link connection identifier (DLCI, Data LinkConnection Identifier) for FR, is that permanent virtual connects (PVC, Permanent VirtualChannel) for ATM.The subchannel state of indication can be with being meant: subchannel is physically available.Whether subchannel is physically available, can be used to according to the bottom link at subchannel place determine.
When subchannel with broadcast nature of the every increase of interface, but and be the time spent at the state of this subchannel, two layers of packaging information of interface all can according to this newly-increased subchannel, be set up in the link protocol unit for this newly-increased subchannel.That is to say that when subchannel of the every increase of interface, two layers of packaging information will be set up for this subchannel for interface in the link protocol unit.Therefore when there was a plurality of subchannel in interface, will there be two layers of respectively corresponding with these a plurality of subchannels packaging information in interface.
Because in actual application, the included subchannel of interface might be dynamically to increase, therefore, the step 201 of present embodiment is not limited to carry out before step 202, as long as interface has increased a subchannel newly, interface link corresponding protocol element is then set up two layers of packaging information at this subchannel.
Step 202: when link protocol unit corresponding to interface received when needing when the multicast of front port transmission or broadcasting packet, the link protocol unit is then according to when each two layers of packaging information corresponding to front port, encapsulates respectively described message and the subchannel by correspondence sends described multicast or broadcasting packet.
The present embodiment method further comprises, when the Link State of certain subchannel of interface correspondence becomes when unavailable, two layers of packaging information setting up at this subchannel are then left out in the link protocol unit.Perhaps, when the message encapsulation format of certain subchannel changed, the message encapsulation format after then changing according to this subchannel upgraded two layers of packaging information corresponding to this subchannel.
Embodiment three
When the Linktype of interface support was the Ethernet broadcasting link, such as ETH, the flow process that then sends message at interface as shown in Figure 3.In the present embodiment, be that virtual ethernet (VLAN) virtual interface is that example describes at first with described interface, the method for present embodiment may further comprise the steps:
Step 301: in the VLAN at VLAN virtual interface place, increase by two layers of port, but and the state of these two layers of ports be the time spent, two layers of packaging information of this VLAN virtual interface are then set up in the link protocol unit for these two layers of ports that increase newly.Here, two of indication layers of port are: ethernet port.
When two layers of port of the every increase of the VLAN at VLAN virtual interface place, but and should two layers of newly-increased port status be the time spent, two layer packaging information corresponding with current VLAN virtual interface all can according to these two layers of newly-increased ports, be set up in the link protocol unit.That is to say that when two layers of port of the every increase of VLAN virtual interface, two layers of packaging information all can be set up for two layers of port for the VLAN virtual interface in the link protocol unit.Therefore when there be a plurality of two layers of port in the VLAN virtual interface, will there be two layers of respectively corresponding with these a plurality of two layers of ports packaging information in interface.
Because in actual application, two layers of port of VLAN may be dynamically to increase, therefore, the step 301 of present embodiment was not limited to before step 302, as long as increased two layers of port newly in the VLAN, VLAN virtual interface link corresponding protocol element is then set up two layers of packaging information at these two layers of ports.
Here, the two layer packaging information corresponding with these two layers of ports are set up according to network layer protocol information and the link layer protocol information of current newly-increased two layers of port in the link protocol unit.
Wherein, two layers of port of indication are available as: available on two layers of ports physical, be communicated with such as plug wire and with opposite equip..
Step 302: receive when link protocol unit corresponding to VLAN virtual interface to obtain this message target MAC (Media Access Control) address when needing when the multicast of front port transmission or broadcasting packet.
Wherein, when needs send be multicast message the time, then obtain the target MAC (Media Access Control) address of multicast message according to the purpose IP address of this multicast message; When needs send be broadcasting packet the time, with the target MAC (Media Access Control) address that carries in the message target MAC (Media Access Control) address as broadcasting packet.
Here, the source MAC of multicast or broadcasting packet is the MAC Address of current VLAN virtual interface self, and this mac address information is after the VLAN virtual interface is determined, promptly can predetermined information, and be the content of link protocol unit record in two layers of packaging information therefore.
Step 303: the link protocol unit is according to the acquisition target MAC (Media Access Control) address, and two layers of packaging information of corresponding each the two layers of port of this VLAN virtual interface, encapsulates respectively described message, and by the message after the encapsulation of each two layers of ports transmission self correspondence.
The method of present embodiment further comprises, when certain two layers of port status corresponding to VLAN virtual interface become when unavailable, then leave out for the two layer packaging information corresponding with these two layers of ports the link protocol unit.Perhaps, when the message encapsulation format of certain two layers of port changed, the message encapsulation format after then changing according to these two layers of ports upgraded two layers of packaging information corresponding to these two layers of ports.
In addition, in the present embodiment, when the interface of supporting the Ethernet broadcasting link is three layers of Ethernet interface, two layers of packaging information then setting up these three layers of Ethernet interfaces are: but when the Ethernet broadcasting link of three layers of Ethernet interface correspondence be the time spent, then set up two layers of packaging information of these three layers of Ethernet interfaces according to this Ethernet broadcasting link.Because three layers of Ethernet interface are unlike the VLAN virtual interface, therefore only can there be one in the two layer packaging information corresponding with three layers of Ethernet interface.When sending multicast or broadcasting packet, then two layers of packaging information according to these three layers of Ethernet interface correspondences encapsulate and send message.Here, two layers of corresponding packaging information are set up according to the network layer protocol information and the link layer protocol information of Ethernet broadcasting link in the link protocol unit.
When Ethernet broadcasting link corresponding to three layers of Ethernet interface is unavailable, deletion two layer packaging information corresponding with these three layers of Ethernet interfaces then.Perhaps, when the message encapsulation format of Ethernet broadcasting link corresponding to these three layers of Ethernet interfaces changes, then upgrade three layers of two layers of packaging information that Ethernet interface is corresponding according to the message encapsulation format after changing.
Here whether the Ethernet broadcasting link of indication can with can be used to according to the bottom link of Ethernet broadcasting link determine, but when the bottom link time spent, thinks that then the Ethernet broadcasting link can use; When the bottom link is unavailable, think that then the Ethernet broadcasting link is unavailable.
The device corresponding with the inventive method comprises link protocol unit 41 and link information unit 42 as shown in Figure 4.
Wherein, link protocol unit 41 be used for setting up two layers of packaging information of interface, and two layers of packaging information will setting up is recorded in link information unit 42; When sending multicast or broadcasting packet, according to two layers of packaging information encapsulation of the interface of link information unit 42 records and send described message.
Here, two layers of packaging information of interface are set up in link protocol unit 41, and the method for encapsulation and transmission multicast or broadcasting packet, can be referring to embodiment one, two and three, and concrete grammar is not described in detail in this.
Wherein, the method for two layers of packaging information of link information unit 42 record interface correspondences can be, sets up an interface link admin table, wherein writing down the corresponding relation between interface and the two layers of packaging information of himself.In the interface link admin table, interface can come unique identification with the interface index of self.When there be a plurality of two layer packaging information corresponding with self in interface, can adopt the mode of chained list to record a plurality of two layer packaging information corresponding with self, specifically can be referring to Fig. 5.Fig. 5 is for when there be a plurality of two layers of packaging information in certain interface, and corresponding interface link is managed the list item structure chart.When the link protocol unit need to send multicast or broadcasting packet according to two layers of packaging information corresponding to interface, only need to search the interface link admin table according to the interface index of interface, can find the corresponding list item that records two layers of packaging information.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (11)
1, a kind of transmission method of message is characterized in that, carries out following steps:
But when link time spent corresponding to interface, set up two layers of packaging information of interface; When interface sends multicast or broadcasting packet, according to two layers of packaging information encapsulation of interface and send described message.
2, method according to claim 1 is characterized in that, when the Linktype of supporting when interface was point-to-point, the point-to-point link of described interface correspondence was available as:
After the link negotiation of the point-to-point link of successfully finishing the interface correspondence, described point-to-point link is available;
Described encapsulation also sends described message and is: two layers of packaging information according to described interface encapsulate described message, and send described message by point-to-point link corresponding to described interface.
3, method according to claim 2 is characterized in that, when point-to-point link corresponding to interface is unavailable, then deletes two layers of packaging information corresponding to this interface;
Or, when the message encapsulation format of point-to-point link corresponding to interface changes, according to the message encapsulation format after changing described two layers of packaging information are made amendment.
4, method according to claim 1 is characterized in that, the Linktype of supporting when interface is that described two layers of packaging information setting up interface are when putting multiple spot:
When a subchannel with broadcast nature of the every increase of point-to-multipoint link corresponding to interface, under this subchannel state is available situation, then set up two a layer packaging information corresponding with this interface for the subchannel of described increase;
Described encapsulation also sends described message and is: according to two layers of packaging information corresponding to each subchannel of described interface encapsulated messages respectively, and send described message by each subchannel.
5, method according to claim 4 is characterized in that, when subchannel corresponding to two layers of packaging information is unavailable, then deletes this two layers of packaging information;
Or, when the message encapsulation format of the corresponding subchannel of two layers of packaging information changes, according to the message encapsulation format after changing described two layers of packaging information are made amendment.
6, method according to claim 1 is characterized in that, when the Linktype of supporting when interface was the Ethernet broadcasting link, described two layers of packaging information setting up interface were:
Be in the situation of virtual ethernet virtual interface at interface, in virtual ethernet corresponding to virtual interface, during the available two layers of port of one of every increase, then set up two a layer packaging information corresponding with virtual interface for these two layers of ports;
Described encapsulation also sends described message and is: according to two layers of packaging information corresponding to each two layers of port of described interface encapsulated messages respectively, and send described message by each two layers of port;
Or, be in the situation of three layers of Ethernet interface at interface, but when the state of Ethernet broadcasting link corresponding to three layers of Ethernet interface be the time spent, set up three layers of two layers of packaging information that Ethernet interface is corresponding;
Described encapsulation also sends described message and is: two layers of packaging information according to described three layers of Ethernet interface encapsulate described message, and send described message by described three layers of broadcasting link corresponding to Ethernet interface.
7, method according to claim 4 is characterized in that, before encapsulation and sending described message, further comprises:
When described message is multicast message, obtain the target MAC (Media Access Control) address of multicast message according to purpose IP address computation;
Purpose media access control MAC address and two layers of packaging information according to multicast message encapsulate and send described multicast message;
Or when described message was broadcasting packet, the target MAC (Media Access Control) address of described message was set to the broadcasting MAC Address of broadcasting packet;
Target MAC (Media Access Control) address and two layers of packaging information according to multicast message encapsulate and send described broadcasting packet.
8, according to claim 6 or 7 described methods, it is characterized in that, when interface is the virtual ethernet virtual interface, when two layers of port corresponding to two layers of packaging information are unavailable, then delete this two layers of packaging information; Or when the message encapsulation format of two layers of port corresponding to two layers of packaging information changes, according to the message encapsulation format after changing described two layers of packaging information are made amendment;
Perhaps, when interface is three layers of Ethernet interface, when Ethernet broadcasting link corresponding to three layers of Ethernet interface is unavailable, then delete two layers of packaging information corresponding to this interface; Or when the message encapsulation format of Ethernet broadcasting link corresponding to interface changes, according to the message encapsulation format after changing described two layers of packaging information are made amendment.
9, according to the described method of arbitrary claim in the claim 1 to 7, it is characterized in that, carry out described operation of setting up two layers of packaging information by the link protocol unit.
10, according to the described method of arbitrary claim in the claim 1 to 7, it is characterized in that, the interface link admin table is set, be used for the corresponding relation between record interface and the corresponding two layers of packaging information.
11, a kind of device that sends message is characterized in that, this device comprises at least, link protocol unit and link information unit; Wherein,
The link protocol unit is used for setting up two layers of packaging information of interface, and is recorded in the link information unit; When sending multicast or broadcasting packet, according to two layers of packaging information encapsulation of the interface of record and send described message;
The link information unit is used to write down two layers of packaging information of the interface that link protocol element sets up.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101524989A CN1925467A (en) | 2006-10-09 | 2006-10-09 | Method and device for message transmission |
| CN2007101515927A CN101132374B (en) | 2006-10-09 | 2007-09-28 | Method and device for transmitting message |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101524989A CN1925467A (en) | 2006-10-09 | 2006-10-09 | Method and device for message transmission |
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| CN1925467A true CN1925467A (en) | 2007-03-07 |
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| CNA2006101524989A Pending CN1925467A (en) | 2006-10-09 | 2006-10-09 | Method and device for message transmission |
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