CN1713614A - Group message header compression in IP telecommunication network system - Google Patents
Group message header compression in IP telecommunication network system Download PDFInfo
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- CN1713614A CN1713614A CNA2004100499459A CN200410049945A CN1713614A CN 1713614 A CN1713614 A CN 1713614A CN A2004100499459 A CNA2004100499459 A CN A2004100499459A CN 200410049945 A CN200410049945 A CN 200410049945A CN 1713614 A CN1713614 A CN 1713614A
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Abstract
First sets head packet marking, packet compression marking and flow marking at head of packet in multi addresses connectionless data network. The source edge gateway gives the IP packet of head packet a deterministic value of flow marking. Then the IP packet containing IP message header is taken as load of packet in multi addresses connectionless data network to entirely put in. In next packet, the IP message header will not be transmitted. For the received head packet in multi addresses connectionless data network packet, the destination edge gateway takes flow marking and IP message header taken out from load as map that is saved in destination edge gateway. The gateway recovers IP message header in next packet according to flow marking, and sends out the recovered IP packet.
Description
Technical field
The present invention relates to a kind of the method for header-compressed be carried out in the grouping that transmits in the IP Telecommunication Network system, belong to communication technical field.
Background technology
The inventor of present patent application considers the development trend of Next Generation Telecommunication Networks, has proposed the technical though of IP Telecommunication Network system, and applied for patent of invention (number of patent application: 200410037641.0, patent application day: on April 28th, 2004).In this IP Telecommunication Network system, has the IP network that does not have connection data network (being designated hereinafter simply as the NCT data network) and conduct " outer net " as the multiple location of " Intranet ".The inner NCT with NCT header that transmits divides into groups at the NCT data network, transmits the IP grouping with IP header in IP network.
This IP Telecommunication Network system adopts the data network of double address structure.The grouping that transmits in the IP network is made up of IP header and IP load, and it carries out addressing with the IP address in IP network; What transmit in the NCT net is the NCT grouping, and it is made up of NCT header and NCT load, and it carries out addressing with the NCT address in the NCT net, and the NCT load of the NCT that transmits in NCT data network grouping is exactly the IP grouping.So, in the NCT grouping, be actually by NCT header+IP header+IP load and form, in IP network, particularly for the IP grouping that transmits real time business, divide into groups as VOIP, its load is often less than 40 bytes, and NCT header+IP header may double loaded length, and this can make the efficient of whole network transmission data reduce obviously, also increase simultaneously the burden of the network equipment, therefore must be improved.
Summary of the invention
The objective of the invention is special construction, propose a kind of method of in the IP Telecommunication Network system, grouping being carried out header-compressed at the IP Telecommunication Network system.
For realizing above-mentioned goal of the invention, the present invention adopts following technical scheme:
A kind of method of the grouping that transmits in the IP Telecommunication Network system being carried out header-compressed, this IP Telecommunication Network system comprises that at least one multiple location do not have the connection data network, a most IP network, and most edge gateway equipments, described multiple location does not have in the data network of connection and has at least one address mapping device, the IP address is adopted in IP grouping in the described IP network, described multiple location does not have the multiple location that connects in the data network and does not have the grouping of the data network of connection and adopt multiple location not have the data of connection net address, be provided with the first packet tag field at its header, packed compressed tag field, the flow label territory is characterized in that comprising the steps:
(1) the IP network user sends the IP grouping;
(2) this IP grouping via end margin gateway device place, source, judge whether it is first packet;
(3) if the first packet of IP grouping, the multiple location of the first packet of this first packet correspondence there is not the grouping of the data network of connection, with the set of first packet mark, the not set of packed compressed mark, and compose with the flow label determined value, end margin gateway device in source will comprise the IP header does not then have complete the putting into of load that connects the data network grouping in interior IP grouping as multiple location; Sending not to have the grouping of the data network of connection in multiple location;
(4) first packet that divides into groups if not IP, for comprising in the header with first packet IP grouping homology, same destination address, with the grouping of professional classification information, determine that it is follow-up IP grouping, the multiple location of its correspondence there is not the not set of first packet mark of the header that connects the data network grouping, packed compressed mark set, and compose with the flow label determined value, the load that this source end margin gateway device only will follow-up IP grouping is put into multiple location does not then have and connects among the load that data network divides into groups;
(5) the destination edge gateway equipment does not have the grouping of the data network of connection to the multiple location that receives, and judges according to first packet mark in its header and header-compressed mark whether it is first packet;
(6) if multiple location does not have the first packet that connects data network, then press the value of flow label, with the flow label value with do not have the load that is connected data network grouping from this multiple location the IP header that takes out make mapping table, leave destination edge gateway equipment place in, the IP grouping that the multiple location of first packet is not had in the load that connects in the data network grouping is taken out then, puts into the transmit queue of destination edge gateway equipment;
(7) there is not the first packet grouping that connects data network if not multiple location, then judge that according to the flow label value of this grouping it is the subsequent packet of which first packet, for this follow-up grouping, from mapping table, get corresponding IP header by the value of flow label, load with this follow-up grouping is assembled into complete IP grouping, puts into the transmit queue of destination edge gateway equipment;
(8) the destination edge gateway equipment sends the IP grouping according to the IP address to IP network.
Described destination edge gateway equipment does not have the grouping of the data network of connection for the multiple location of the non-first packet that receives, if find that the flow label value does not have corresponding list item in this grouping in the header mapping table, then the destination edge gateway equipment is somebody's turn to do the first packet of grouping to source end margin gateway device request repeat.
The IP grouping with same source, destination address and class of service of carrying out header-compressed for each group in the described destination edge gateway equipment is provided with timer, in case overtime, then edge gateway equipment is removed the list item and the mapping table of the IP header correspondence of this IP grouping automatically.
First packet is represented in the set of described first packet mark, declines bit table and is shown non-first packet.
The set of described header-compressed mark is represented header through overcompression, declines the bit representation header without overcompression.
In addition, described IP grouping can be substituted by ATM grouping or frame relay grouping.
Method of in the IP Telecommunication Network system header-compressed is carried out in grouping of the present invention is the double address structure that adopts at the IP Telecommunication Network system and the technical scheme that proposes.It is different fully with prior art, can effectively reduce the total amount of transmission data in the network.
Description of drawings
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Fig. 1 is the composition structural representation of IP Telecommunication Network system.
Fig. 2 is the exemplary plot of a kind of embodiment of NCT packet format.
Fig. 3 is the flow chart that grouping is carried out the method for header-compressed of the present invention.
Embodiment
Before the method to data packet header compression of the present invention describes, briefly introduce the IP Telecommunication Network system that the present invention relied on that implements earlier.
The IP Telecommunication Network system is the basic trend of the inventor of this patent in conjunction with the telecommunications network technology shifts, the technic relization scheme of a kind of Next Generation Telecommunication Networks that proposes under the prerequisite of pluses and minuses separately at further investigation telecommunications network and Internet.This IP Telecommunication Network system is based on the not connection-oriented system of IP agreement.As shown in Figure 1, this IP Telecommunication Network system comprises at least one NCT data network, most IP networks, and most edge gateway equipment ED.Here said IP network includes but not limited to IP metropolitan area network, Access Network or the local network of users, and it is connected with the NCT data network by edge gateway equipment ED; Also comprise at least one address mapping device ADT in each NCT data network; All devices in the NCT data network and edge gateway equipment all are assigned a NCT data network address, all devices in the IP network and edge gateway equipment ED are assigned the IP address, and the mapping relations between IP address and the NCT data network address are kept among the interior address mapping table of address mapping device ADT; Connect between the authenticated and address mapping device ADT of edge gateway equipment ED.The NCT data network is as " Intranet ", adopt architecture with the similar level type of existing switching network for communication, it is made up of core layer equipment CR, convergence-level equipment MR, access layer equipment AR, network management device and address mapping device ADT, communicates by letter by core layer equipment CR realization separately between each NCT data network.Carry out addressing in the inner address of NCT data network of adopting of NCT data network itself, this data network address is different from the IP address of IP network.This double address structure is to understand the key point of this IP Telecommunication Network system.
Address mapping device ADT equipment is the equipment of realizing map addresses on the network, and it preserves address mapping table.The content-dependent of address mapping table is in the type of the external network that links to each other with edge gateway equipment.Edge gateway equipment ED is the gateway device that IP network is connected with the NCT data network.It has the function of two aspects at least, and the first realizes the conversion of NCT data network address and IP address, makes the NCT data network can carry existing IP grouping; Another function is that the Business Stream to IP network converges.
In the IP Telecommunication Network system, IP network separates with the strictness on topological structure of NCT data network.Each IP network connects with one of them NCT data network separately, and and this NCT data network between the relation of breaking the wall of mistrust, this just means that the grouping of transmitting between the different nodes in the IP network must just can arrive the destination through after the NCT data network.This communication process is such: source end margin gateway device ED receives the IP grouping of IP network, and the IP destination address in the IP grouping is delivered to address mapping device ADT; Address mapping device ADT carries out the IP destination address of IP network and address resolution and the mapping between the NCT address, gives source end margin gateway device with the NCT address loopback of the destination edge gateway equipment that obtains; Source end margin gateway device adds the NCT header according to the NCT address of loopback in the IP grouping, it is become the NCT bag, again this grouping is sent to the destination edge gateway equipment; The destination edge gateway equipment receives the NCT grouping, is converted to the IP grouping equally, and transmits this grouping according to purpose IP address to IP network.
From above-mentioned data communication process as can be seen, a large amount of IP that transmit are grouped in the process of transmitting through the NCT data network in the IP Telecommunication Network system, and in NCT data network inside, the IP header can temporarily become the load of NCT grouping.The inner data volume that transmits of NCT data network can be bigger like this, thereby increase a lot of burdens for NCT data network internal unit and edge gateway equipment.
For this reason, the present invention proposes the method that a kind of header that in the IP Telecommunication Network system IP is divided into groups compresses.Realize that this method at first will be provided with first packet mark, packed compressed mark and flow label at the header portion of NCT grouping.
The NCT packet format that above-mentioned tag field is set as shown in Figure 2.This form is an example, is not unique.Its form is used for reference the packet format of IPv6 agreement regulation, but has significantly different again with this packet format.As shown in Figure 2, in this packet format, be the needs of header-compressed, increased first packet tag field, packed compressed tag field and flow label territory specially, wherein the implication of first packet mark is with the regulation in the IPv6 agreement, and it takies 1bit, first packet is represented in its set, declines bit table and is shown non-first packet; The header-compressed mark takies 1bit, and its set is represented header through overcompression, declines the bit representation header without overcompression; Flow label is the stream sequence number of system for this stream traffic assignments.
For the IP grouping that the IP network user transmits, at end margin gateway device ED place, source, judge at first whether it is first packet IP grouping, if, with the set of first packet mark, the not set of packed compressed mark, and tax with the flow label determined value.ED equipment will comprise header load complete put into of interior this first packet IP grouping as the NCT grouping in the NCT bag that correspondence generates then, and promptly the NCT that generates this moment is grouped into: NCT header+IP header+IP load.
ED equipment judges the header of the follow-up grouping transmitted in the IP network, for comprise homology, same destination address in the header, with the grouping of professional classification information, can be defined as the follow-up grouping of above-mentioned first packet grouping.For this grouping,, packed compressed mark set, and compose with the flow label determined value with its not set of first packet mark.Then, ED equipment is in the NCT grouping that is generated by follow-up grouping, and load (payload) that only will this follow-up grouping is put among the load that NCT divides into groups, and the IP header is no longer put into, and promptly NCT is grouped into: NCT header+IP load.
The NCT of carrying IP load divides into groups according to the NCT address addressing in the NCT data network that comprises in the NCT header, and finally arrives destination ED equipment place.
The NCT packet of destination ED to receiving, according to the first packet mark set in its header, the not set of header-compressed mark is judged to be the first packet grouping of header uncompressed with it.For the grouping of this first packet, the value of press flow label is shone upon flow label value and the IP header that takes out from the load of NCT grouping, leave destination ED place in, is used as the header that follow-up IP divides into groups and resumes work.Then, comprise in the load with the NCT grouping that the IP complete packet of IP header and IP load is taken out, put into the transmit queue of ED.
Destination ED is for the NCT packet that receives, if its not set of first packet mark, packed compressed mark set then according to the flow label value of this packet, judges that it is the subsequent packet of which first packet.For this subsequent packet, press the value of flow label, in the mapping table that flow label value and IP header are done, get corresponding IP header, reassemble into complete IP grouping with the IP load of from this follow-up grouping load, taking out, put into the transmit queue of ED.
Because the IP Telecommunication Network system is not towards the data network that connects, do not adopt complicated fluidics, the first packet grouping might be lost.In this case, at destination ED place, to the not set of first packet mark that receives, the grouping of packed compressed mark set, value by flow label makes to get in the mapping table corresponding IP header in flow label value and IP header, as find that the flow label value does not have corresponding list item in the header mapping table, the first packet grouping that then shows this flow label value is not received, destination ED will send out the Report of Discrepancy grouping of " first packet is not received " to source end ED, source end ED receives after this Report of Discrepancy grouping, retransmits the first packet grouping of this flow label.
In addition, because the follow-up grouping of transmitting in the IP Telecommunication Network system might be lost, take the internal memory of ED for a long time and do not play a role for fear of the flow label of this grouping and mapping table that the IP header is done, can in destination ED, timer be set for each grouping, in case overtime, then ED removes this list item and mapping table automatically.
By above-mentioned technical step, in the IP Telecommunication Network system, for homology, same destination address, for the IP grouping of professional classification, the IP header only need transmit once, and so just reducing needs the data total amount transmitted in the network, has realized the purpose of header-compressed.
It must be noted that first packet mark and packed compressed mark independently work respectively, not all grouping all will be through overcompression.If grouping does not need compression, packed compressed mark is unwanted, but the first packet mark may still need.
Above-mentioned header compression scheme not only divides into groups to transmit via the NCT data network suitable to IP, be suitable for too via the process that IP network transmits for the NCT grouping.Say that further for the atm device or the Frame Relay Device that are connected with the NCT data network, when the ATM of its transmission grouping or frame relay were grouped in through the NCT data network, its header also can adopt above-mentioned scheme to compress.
Above the method that realizes the packet header compression in the IP Telecommunication Network system is had been described in detail, but obvious specific implementation form of the present invention is not limited thereto.For the those skilled in the art in present technique field, the various conspicuous change of under the situation of spirit that does not deviate from the method for the invention and claim scope it being carried out is all within protection scope of the present invention.
Claims (6)
1. method of the grouping that transmits in the IP Telecommunication Network system being carried out header-compressed, this IP Telecommunication Network system comprises that at least one multiple location do not have the connection data network, a most IP network, and most edge gateway equipments, described multiple location does not have in the data network of connection and has at least one address mapping device, the IP address is adopted in IP grouping in the described IP network, described multiple location does not have the multiple location that connects in the data network and does not have the grouping of the data network of connection and adopt multiple location not have the data of connection net address, be provided with the first packet tag field at its header, packed compressed tag field, the flow label territory is characterized in that comprising the steps:
(1) the IP network user sends the IP grouping;
(2) this IP grouping via end margin gateway device place, source, judge whether it is first packet;
(3) if the first packet of IP grouping, the multiple location of the first packet of this first packet correspondence there is not the grouping of the data network of connection, with the set of first packet mark, the not set of packed compressed mark, and compose with the flow label determined value, end margin gateway device in source will comprise the IP header does not then have complete the putting into of load that connects the data network grouping in interior IP grouping as multiple location; Sending not to have the grouping of the data network of connection in multiple location;
(4) first packet that divides into groups if not IP, for comprising in the header with first packet IP grouping homology, same destination address, with the grouping of professional classification information, determine that it is follow-up IP grouping, the multiple location of its correspondence there is not the not set of first packet mark of the header that connects the data network grouping, packed compressed mark set, and compose with the flow label determined value, the load that this source end margin gateway device only will follow-up IP grouping is put into multiple location does not then have and connects among the load that data network divides into groups;
(5) the destination edge gateway equipment does not have the grouping of the data network of connection to the multiple location that receives, and judges according to first packet mark in its header and header-compressed mark whether it is first packet;
(6) if multiple location does not have the first packet that connects data network, then press the value of flow label, with the flow label value with do not have the load that is connected data network grouping from this multiple location the IP header that takes out make mapping table, leave destination edge gateway equipment place in, the IP grouping that the multiple location of first packet is not had in the load that connects in the data network grouping is taken out then, puts into the transmit queue of destination edge gateway equipment;
(7) there is not the first packet grouping that connects data network if not multiple location, then judge that according to the flow label value of this grouping it is the subsequent packet of which first packet, for this follow-up grouping, from mapping table, get corresponding IP header by the value of flow label, load with this follow-up grouping is assembled into complete IP grouping, puts into the transmit queue of destination edge gateway equipment;
(8) the destination edge gateway equipment sends the IP grouping according to the IP address to IP network.
2. as claimed in claim 1 the method for header-compressed is carried out in the grouping that transmits in the IP Telecommunication Network system, it is characterized in that:
Described destination edge gateway equipment does not have the grouping of the data network of connection for the multiple location of the non-first packet that receives, if find that the flow label value does not have corresponding list item in this grouping in the header mapping table, then the destination edge gateway equipment is somebody's turn to do the first packet of grouping to source end margin gateway device request repeat.
3. as claimed in claim 1 the method for header-compressed is carried out in the grouping that transmits in the IP Telecommunication Network system, it is characterized in that:
The IP grouping with same source, destination address and class of service of carrying out header-compressed for each group in the described destination edge gateway equipment is provided with timer, in case overtime, then edge gateway equipment is removed the list item and the mapping table of the IP header correspondence of this IP grouping automatically.
4. as claimed in claim 1 the method for header-compressed is carried out in the grouping that transmits in the IP Telecommunication Network system, it is characterized in that:
First packet is represented in the set of described first packet sign, declines bit table and is shown non-first packet.
5. as claimed in claim 1 the method for header-compressed is carried out in the grouping that transmits in the IP Telecommunication Network system, it is characterized in that:
The set of described header-compressed mark is represented header through overcompression, declines the bit representation header without overcompression.
6. as claimed in claim 1 the method for header-compressed is carried out in the grouping that transmits in the IP Telecommunication Network system, it is characterized in that:
Described IP grouping also can be ATM grouping or frame relay grouping.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100499459A CN100393064C (en) | 2004-06-21 | 2004-06-21 | Group message header compression in IP telecommunication network system |
| EP05752258A EP1748600A4 (en) | 2004-04-28 | 2005-04-28 | A system and communication method of ip telecommunication network and its application |
| US11/587,810 US7894458B2 (en) | 2004-04-28 | 2005-04-28 | System and communication method of IP telecommunication network and its application |
| PCT/CN2005/000594 WO2005107161A1 (en) | 2004-04-28 | 2005-04-28 | A system and communication method of ip telecommunication network and its application |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100499459A CN100393064C (en) | 2004-06-21 | 2004-06-21 | Group message header compression in IP telecommunication network system |
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| CN1713614A true CN1713614A (en) | 2005-12-28 |
| CN100393064C CN100393064C (en) | 2008-06-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100440869C (en) * | 2006-04-11 | 2008-12-03 | 华为技术有限公司 | UDP message header compression activation method |
| WO2013149587A1 (en) * | 2012-04-05 | 2013-10-10 | 中兴通讯股份有限公司 | Ethernet message compression and decompression methods and network element device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000079764A1 (en) * | 1999-06-18 | 2000-12-28 | Telefonaktiebolaget L M Ericsson (Publ) | Robust delta encoding with history information |
| DE50107510D1 (en) * | 2000-07-25 | 2005-10-27 | Siemens Ag | HEADER COMPRESSION PROCESS FOR NETWORK PROTOCOLS |
| FI118244B (en) * | 2001-06-27 | 2007-08-31 | Nokia Corp | Mediation of a header field compression identifier using a data packet connection |
| JP3617967B2 (en) * | 2001-09-28 | 2005-02-09 | 松下電器産業株式会社 | Header compressed packet receiving apparatus and method |
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2004
- 2004-06-21 CN CNB2004100499459A patent/CN100393064C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100440869C (en) * | 2006-04-11 | 2008-12-03 | 华为技术有限公司 | UDP message header compression activation method |
| WO2013149587A1 (en) * | 2012-04-05 | 2013-10-10 | 中兴通讯股份有限公司 | Ethernet message compression and decompression methods and network element device |
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