CN1859292A - Household gateway and method for ensuring household network service terminal QoS - Google Patents
Household gateway and method for ensuring household network service terminal QoS Download PDFInfo
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Abstract
The present invention relates to digital communication technology, especially referring to a home gateway and ensuring home network service terminal QoS method. Said home gateway HGW includes service type recognizer used for identifying message service type; network address convert NAT used for according to service type converting message source address to relevant public network IP address; at least two connecting passages connected to network side equipment, said connecting passage capable of obtaining at least one public network IP address. The present invention can effectively prevent unauthorized PC accessing network user access network using service terminal uplink channel, to make PC user capable of freely selecting pay charges mode, at the same time saving IP resource, each terminal capable of realizing intercommunication, effectively ensuring speech-sounds, video data service obtaining good QoS ensuring.
Description
[technical field]
The present invention relates to digital communication technology, the method for particularly a kind of home gateway and guarantee in-home network service terminal QoS.
[background technology]
The development of mechanics of communication at present, digital home begins to go deep into actual life, the network equipment in the family is more and more, the network-based service kind is also more and more, data service as PC (PC) online, digital telephone (IP Phone) provide VoIP business, the BTV/VoD business that top box of digital machine (IP STB) provides, the visual telephone business that visual telephone (Video Phone) provides.And home gateway (HGW) is in the core position of home network, and all business all are carried on the IP network, sends to SP (Service Provider, service provider) network through HGW by identical data feedback channel.These data feedback channels are based on IP's, may be various transmission technologys such as ADSL/ADSL2+, VDSL/VDSL2, EPON/GPON/GEPON, WiMAX it
Shown in Figure 1 is networking and Access Network networking diagram in the existing family.In order to make PC and miscellaneous service terminal provide good business for the user, HGW must consider following problem:
1. generally speaking, the transmission bandwidth of household internal can reach 10M, even 100M, but at the upstream Interface place, bandwidth often converges has only 2M or 4M, is far smaller than the bandwidth of household internal.Caused a problem like this: the QoS that how to ensure miscellaneous service terminal in the family? at the DSLAM place, a large amount of Business Streams converges and has a bandwidth bottleneck, do you how guarantee QoS herein? if all data all adopt the PPPoE encapsulation, the PPPoE because DSLAM does not terminate, can't discern the data type in the PPPoE encapsulation, nature can't carry out the QoS scheduling.
2. there are PC, various terminals such as IP Phone, IPSTB in the family, must realize direct intercommunication between each terminal.Can play the program source of storing on the PC as IPSTB, and IP Phone can obtain the last telephone book stored of PC etc.Realize the direct intercommunication of equipment, then require various terminals all to use the IP agreement, and have the IP address of phase same network segment.
3. the terminal quantity in the family is huge, and the address space that present IPv4 can provide is limited, particularly in China, and IP address resource famine.If each terminal in the family all takies a public network IP address, then can cause serious IP address waste.Any one SP can't accept this situation.
4. present most of PC Internet user adopts the PPP over Ethernet online, and SP such as telecommunications then provide different charging policy, and constant expense monthly payment, calendar scheduling are arranged.But the miscellaneous service terminal except that PC but needs one day 24 hours on lines.If offering the network of service terminal is UNICOM, PC is passage access network from then on just, escapes the charging of SP.How stoping unwarranted user to use the data feedback channel access network of service terminal also is the problem that HGW need solve.
A kind of solution of prior art is: it is PPPoE that maximum modes is used in the access of terminal equipment, and PPPoE has greater advantage for the data access of PC class.If there are a plurality of terminals, then insert the network of SP by PPP over Ethernet by home gateway (HGW), simultaneously provide network address translation (nat) and DynamicHost configuration service (DHCP server) function on HGW, the various device in the family obtains the IP address by DHCP from HGW.The data of PC in the family and miscellaneous service terminal are all undertaken transmitting after the address transition by HGW, as shown in Figure 2.The shortcoming of this method is: 1. need the data feedback channel of QoS business that ensures and the data business of networking that needs QoS to ensure to combine, if provide the business (chargeing according to the request program number by call duration charging, VoD) of chargeing just to necessarily require the user to open the data access service by traffic carrying capacity as voip phone, and select way of paying in unlimited time, serious like this limited the professional potential user group of carrying out.2. all uplink data messages all must be encapsulated in the message of PPPoE, and after the DSLAM place converged, the PPPoE because DSLAM does not terminate can't discern the type of message in the PPPoE encapsulation, and nature can't provide the effective QoS guarantee.
The another kind of solution of prior art is to transform on the basis of scheme one: HGW no longer carries out the NAT conversion to message, and all up-downgoing messages are all directly forwarded.The PC that connects under the HGW directly carries out the PPPoE dialing, and service terminal directly obtains the network that SP is inserted in the IP address from network side by DHCP, as shown in Figure 3.The data flow that Business Stream that this scheme is sent service terminal and data terminal are sent is isolated fully, makes DSLAM can carry out the QoS scheduling of Different Strategies to various traffic streams, has satisfied the qos requirement of service terminal.Shortcoming is: 1. the equipment in the family has obtained the IP address from different approach, is in the different network segments, even part is in public network address, part is a private net address, directly intercommunication of various device is wanted the words of intercommunication must arrive on the router of SP and is carried out intercommunication, implements very complicated.2. each equipment in the family all directly links to each other with the Internet, is exposed to public's face circle, is difficult to guarantee fail safe.3. each service terminal all needs to distribute independent public network IP address, serious waste the IP resource.This NAT when 4. having a plurality of data terminals (as PC) in the family, need equipment that nat feature is provided, though can be provided inconvenience after all by the PC that carries out the PPPoE dialing.
[summary of the invention]
The object of the present invention is to provide a kind of method that solves the home gateway of defective in the prior art and ensure in-home network service terminal QoS.
The technical solution adopted for the present invention to solve the technical problems is: a kind of home gateway, described home gateway HGW comprises the type of service identifier that is used to discern type of service under the message, be used for according to type of service is that the network address translater NAT of corresponding public network IP address and at least two are connected to interface channel network equipment, that be used for bearer service with the message source address transition, and described each interface channel can obtain at least one public network IP address.
Further, described wherein interface channel is used to transmit the message that needs the business that QoS ensures, it is joined location server DHCP server in the DHCP mode from DynamicHost and obtains public network IP address IP1 or public network IP address IP1 is set; Another interface channel is used to carry the PPPoE message that other do not need QoS to ensure, it obtains public network IP address IP2 with PPP over Ethernet from BAS.
Further, described NAT be used for will need the source address of message of the business that ensures of QoS upwards transmit after being converted to described public network address IP1, after not needing the source address of the message of the business that QoS ensures to be converted to described public network address IP2 other, being encapsulated in the PPPoE message format and upwards transmitting.
An improvement as a kind of home gateway of the present invention also comprises the priority flag device, and being used for public network address is that the message of IP1 is upwards transmitted after with different 802.1P priority according to its type of service mark again.
The invention provides the method for a kind of guarantee in-home network service terminal QoS based on above-mentioned home gateway, comprise step:
501, HGW and network equipment are set up at least two interface channels;
502, the request message that the HGW receiving terminal sends is a private network IP of this terminal distribution address;
503, HGW identifies type of service, and according to the QoS rule that sets in advance, and the source address of the message of the business that needs QoS to ensure and the data service that do not need the QoS guarantee is converted to corresponding public network IP address, sends from corresponding interface channel.
In the said method, described HGW is by checking the specific fields identification services type of message, or the source MAC identification services type by the matched termination, or the source/purpose IP Address Recognition type of service by the matched termination.
Further, in the step 501, HGW obtains public network address IP1 or a fixed ip address IP1 is set from DHCP server in the DHCP mode by interface channel one, obtains public network address IP2 with PPP over Ethernet from broadband access system BAS by interface channel two.
As an improvement of the present invention, in the step 503, for the business that needs QoS to ensure, after HGW is converted to address ip 1 with the source address of message, with the VLAN ID of 802.1Q, the perhaps priority of 802.1P, the perhaps priority of ToS, perhaps DSCP priority in addition mark send from interface channel one then with the differentiated service type.。
Further, in the step 503, for the business that does not need QoS to ensure, HGW encapsulates with PPPoE after the source address of message is converted to address ip 2, sends from interface channel two then.
As an improvement, the inventive method further comprises: the message that the described interface channel one of described DSLAM priority treatment sends.
Improve as another of the inventive method, described DALAM dispatches according to the VLAN ID of 802.1Q or 802.1P priority or ToS priority or DSCP priority the message of described interface channel one carrying.
The invention has the beneficial effects as follows: 1. home gateway (HGW) but identification terminal type/type of service, and support two or many interface channels, be public network IP address of every passage application, PPPoE is carried on different interface channels respectively with IPoA, prevent that unwarranted PC Internet user from using the data feedback channel access network of service terminal, make the PC Internet user can freely select way of paying, saved the IP resource simultaneously.2. HGW network enabled address translation feature (NAT) can be the private network IP that each terminal equipment distributes the same network segment, makes terminal can realize intercommunication easily.3. digital subscriber access server (DSLAM) priority treatment IPoA message, to the priority flag P1 of IPoA message according to 802.1P, P2 dispatches simultaneously, thereby has ensured that voice, video, data service can both obtain good QoS and guarantee.
[description of drawings]
Fig. 1 is networking and an Access Network networking diagram in the existing family.
Fig. 2 is the schematic diagram of prior art one.
Fig. 3 is the schematic diagram of prior art two.
Fig. 4 is a system and method schematic flow sheet of the present invention.
[embodiment]
With specific embodiment the present invention is further elaborated with reference to the accompanying drawings below.
The same in system of the present invention and the prior art, comprising: terminal, home gateway (HGW), digital subscriber access server (DSLAM), broadband access system (BAS, Broad Access System) and DynamicHost are joined location server (DHCP server).Wherein, terminal mainly comprises set-top box (STB), Digital Television (IPTV), video telephone (Video Phone), digital telephone (IP Phone) and PC (PC).Type of service mainly comprises data service (PC) that does not need the QoS guarantee and the business (as VoIP business, IPTV and Video Phone business) that needs QoS to ensure.In this preferred embodiment, mainly data service and the VoIP business with PC is that the present invention will be described for example.
As shown in Figure 4, in the system of the present invention, HGW comprises: be used to discern type of service under the message the type of service identifier, to be used for according to type of service be that the network address translater NAT of corresponding public network IP address and at least two are connected to interface channel network equipment, that be used for bearer service with the message source address transition.It has following characteristics:
(1) HGW supports DynamicHost to join location service function (DHCP server), and can the identification services type.Such as can be according to the specific fields in the DHCP message (as DHCP Option 60) identification terminal type, thereby identification services type: if be not with Option 60 options in the DHCP that the sends request, then think the service terminal of this non-operator of equipment, it is data terminal, if the message that terminal is sent has the Option60 field, then can be according to the data identification terminal type of this field.Can according to information such as device type, MAC Address, IP address, TCP/UDP port numbers, application layer protocol to business discern (such as, if addresses such as MAC Address, IP address, TCP/UDP port numbers, application layer protocol and appointment consistent of the IP that passes bag, but identification services type then is to start predetermined QoS rule).
(2) support at least two interface channels (the present invention is an example with two), described interface channel can be that permanent virtual connects PVC or VLAM, interface channel one is used to carry the service message that needs QoS to ensure, it is joined location server DHCP server in the DHCP mode from DynamicHost and obtains a public network IP address IP1, or public network IP address IP1 is set; Interface channel two is used to carry the data service that does not need QoS to ensure, i.e. PPPoE message, and it obtains public network IP address IP2 with PPP over Ethernet from BAS.
(3) support and network address translation function (NAT), HGW will need the source address of the message of the business that QoS ensures to be converted to a public network address and according to traffic flow types packet labeling upwards be transmitted after with different 802.1P priority, do not need the source address of the data message that QoS ensures to be converted to another public network address other and carry out the encapsulation of PPPoE after upwards transmit.
DSLAM has following characteristics in the system of the present invention: can be according to VLAN ID or 802.1P priority or ToS priority or the DSCP priority identification terminal type/type of service that message carries of PVC, 802.1Q, and carry out QoS according to pre-defined rule and ensure, as priority treatment VoIP business, voice, video traffic are dispatched etc.
The inventive method mainly comprises step: 501, and HGW and network equipment are set up at least two interface channels; 502, the request message that the HGW receiving terminal sends belongs to the private network IP address of the same network segment for one of this terminal distribution; 503, HGW identifies type of service, and according to the QoS rule that sets in advance, and the source address of the message of the business that needs QoS to ensure and the data service that do not need the QoS guarantee is converted to corresponding public network IP address, sends from corresponding interface channel.
Be example to set up the PVC passage between HGW and the network equipment DSLAM below, introduce the specific implementation flow process of preferred embodiment of the present invention, comprise step:
S1, HGW set up two permanent virtual with DSLAM and are connected PVC1 and PVC2, and wherein, PVC1 is used to carry the message that needs QoS to ensure, PVC2 is used to carry the PPPoE message that does not need QoS to ensure;
S2, HGW obtains public network address IP1 (or use fixed ip address IP1 directly be set) in the DHCP mode from DHCP server by PVC1, obtains public network address IP2 with PPP over Ethernet from BAS by PVC2.
S31, STB send the DHCP request message, and DHCP Option 60 fields comprise optional data A in the message;
S32, IP Phone sends the DHCP request message, and DHCP Option 60 fields comprise optional data B in the message;
S33, PC send the DHCP request message, and DHCP Option 60 fields do not have optional data in the message;
S4, HGW obtains the type of terminal equipment according to Option 60 fields, for STB distributes address IP-a, distributes address IP-b, is PC distribution address IP-c for IP Phone; Because IP-a, IP-b, IP-c are the private network IP of the same network segment, and these three terminals can realize intercommunication easily;
S5, HGW judges this IP bag loaded service stream according to source address IP-a and is the VoIP business, this message is converted to IP1 through NAT1 with its source address, and adds priority (can also be VLAN ID or ToS priority or the DSCP priority of 802.1Q) the mark P1 of 802.1P; Judge this IP bag loaded service stream for the VoIP business according to source address IP-b, this message is converted to IP1 through NAT1 with its source address, and adds the priority flag P2 of 802.1P; Judge this IP bag loaded service stream for data service according to source address IP-c, this message is converted to IP2 through NAT2 with source address, and carries out the PPPoE encapsulation; HGW is carried on PPPoE with data service like this, and other service bearers are at IPoA;
Message after S6, HGW handle NAT1 sends from PVC1, and the message after NAT2 is handled sends from PVC2;
S7, after DSLAM receives message from HGW, the message that priority treatment PVC1 passage sends, handle the message that the PVC2 passage sends again, simultaneously to the IP message of PVC1 carrying priority flag P1 according to 802.1P, P2 dispatches, thereby has ensured that voice, video, data service can both obtain good QoS and guarantee.
Above message is all must carry out the processing of Buffer buffer scheduling in HGW in the HGW processing procedure, to ensure its QoS.
If the third Business Stream is arranged, then HGW can set up PVC3 with DSLAM and is connected, and applies for the 3rd public network IP address, and from then on passage sends Business Stream.
Claims (11)
1, a kind of home gateway, it is characterized in that: described home gateway HGW comprises the type of service identifier that is used to discern type of service under the message, be used for according to type of service is that the network address translater NAT of corresponding public network IP address and at least two are connected to interface channel network equipment, that be used for bearer service with the message source address transition, and described each interface channel can obtain at least one public network IP address.
2, home gateway according to claim 1, it is characterized in that: described wherein interface channel is used to transmit the message that needs the business that QoS ensures, it is joined location server DHCP server in the DHCP mode from DynamicHost and obtains public network IP address IP1 or public network IP address IP1 is set; Another interface channel is used to carry the PPPoE message that other do not need QoS to ensure, it obtains public network IP address IP2 with PPP over Ethernet from BAS.
3, home gateway according to claim 1 and 2, it is characterized in that: described NAT be used for will need the source IP address of message of the business that ensures of QoS upwards transmit after being converted to described public network address IP1, after not needing the source IP address of the message of the business that QoS ensures to be converted to described public network address IP2 other, being encapsulated in the PPPoE message format and upwards transmitting.
4, home gateway according to claim 3, it is characterized in that: also comprise the priority flag device, being used for public network address is that the message of IP1 is according to the VLAN ID of its type of service mark with different 802.1Q, perhaps 802.1P priority, perhaps ToS priority is perhaps upwards transmitted after the DSCP priority again.
5, the method for a kind of guarantee in-home network service terminal QoS based on the described home gateway of claim 1 is characterized in that comprising step:
501, HGW and network equipment are set up at least two interface channels;
502, the request message that the HGW receiving terminal sends is a private network IP of this terminal distribution address;
503, HGW identifies type of service, and according to the QoS rule that sets in advance, and the source IP address of the message of the business that needs QoS to ensure and the data service that do not need the QoS guarantee is converted to corresponding public network IP address, sends from corresponding interface channel.
6, method according to claim 5, it is characterized in that: described HGW is by checking the specific fields identification services type of message, or the source MAC identification services type by the matched termination, or the source/purpose IP Address Recognition type of service by the matched termination.
7, method according to claim 5, it is characterized in that: in the step 501, HGW obtains public network address IP1 or a fixed ip address IP1 is set from DHCP server in the DHCP mode by interface channel one, obtains public network address IP2 with PPP over Ethernet from broadband access system BAS by interface channel two.
8, the method for guarantee in-home network service terminal QoS according to claim 7, it is characterized in that: in the step 503, for the business that needs QoS to ensure, after HGW is converted to address ip 1 with the source address of message, with the VLAN ID of 802.1Q, the perhaps priority of 802.1P, the perhaps priority of ToS, perhaps DSCP priority in addition mark send from interface channel one then with the differentiated service type.
9, the method for guarantee in-home network service terminal QoS according to claim 7, it is characterized in that: in the step 503, for the data service that does not need QoS to ensure, after HGW is converted to address ip 2 with the source IP address of message, encapsulate with PPPoE, send from interface channel two then.
10, the method for guarantee in-home network service terminal QoS according to claim 7 is characterized in that further comprising: the message that the described interface channel one of described DSLAM priority treatment sends.
11, the method for guarantee in-home network service terminal QoS according to claim 8 is characterized in that: described DALAM dispatches according to the VLAN ID of 802.1Q or 802.1P priority or ToS priority or DSCP priority the message of described interface channel one carrying.
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