CN101188582B - System and method for H.323 terminal communication cross the isomerous network - Google Patents
System and method for H.323 terminal communication cross the isomerous network Download PDFInfo
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Abstract
The invention discloses a terminal device based on H.323 in an IPv6 network, and a system and a method among the terminal devices based on the H.323 and positioned in an IPv4 network and outside the device. The invention relates to the network communication field, and is proposed to solve the multimedia communication among the H.323 based terminal devices in a heterogeneous network. In the condition of not changing the original IPv4 device and network deployment, the problem of H.323 terminal communication in the heterogeneous network can be well solved only by adding an NAT-PT proxy device and an H.323 proxy device in the IPv6 network. In the invention, the H.323 proxy plays the function of communication transfer, and simultaneously, a static mapping of the H.323 proxy device is required to be provided on the NAT-PT, in order to map the v6 address to be a global unique v4 address. The invention is suitable for the media communication of the heterogeneous network.
Description
Technical field
The present invention relates to network communication field, relate in particular to and carry out the method that terminal is H.323 carried out multimedia communication between a kind of IPv6 network and the IPv4 network.
Background technology
In recent years, VoIP has caused the interest that people are increasing, many tissues are devoted to study and define the standard of calling out in real time on the IP network, wherein, H.323 standard is that ITU-T organizes and set up on basis H.320/H.324 in 1996, its application target is in the IP-based network environment, to realize reliable real-time application towards audio frequency and video and data.Present constantly perfect through for many years technical development and standard, H.323 become by the vast ripeness standard family that ITU member and client accepted, based on not only can realizing reliable intercommunication between the product H.323, and with based on H.320, also realized reliable interconnection between H.324 the multimedia communication network.Along with progressively maturation H.323, More and more factories competitively drops into the H.323 exploitation of new product, increasing user adopts themselves video conferencing system of H.323 technology and product configurations, and especially in China, most multi-media communication business all adopts is agreement H.323.
Yet along with the fast development of internet, IPv4 (Internet Protocol version 4) address space is more and more deficienter, presses for a kind of new Internet Protocol and replaces, and IPv6 (Internet Protocol version 6) arises at the historic moment.Compare with the IPv4 agreement, a series of advanced features that IPv6 possesses as the address space of abundance, configuration, improved mobility and fail safe automatically, make its attention that more and more causes people, and IPv6 has entered a substantial construction period.But no matter from operation cost, or the urgent degree of people's demand considers, the deployment of IPv6 network can be a progressive process only all, will inevitably be network coexisted with existing IPv4 in very long one section, and finally replace IPv4.
H.323 agreement itself is irrelevant with the IP layer, be applicable to IPv4 network and IPv6 network, but when connecting, connecting address and the port numbers set up need specify in payload, simple NAT-PT (network address translation and protocol conversion) though can to IPv4 and IPv6 address port change, but for H.323 data are then powerless, H.323 what rely on NAT-PT equipment to make to pass through heterogeneous network merely carries out proper communication between the terminal.
Equally, in IPv6 networking process, some individuals or enterprise are in security consideration, fire compartment wall is disposed in the capital in the local area network (LAN) that adopts IPv6, simultaneously, and when needs communicate with external IP v4 public network, adopt NAT-PT equipment to carry out address and port translation, at this moment, IPv6 network internal terminal is carried out multi-media communication can not run into any problem, but when with the IPv4 public network in H.323 terminal called the time just can't carry out operate as normal.
Make and H.323 carry out proper communication by fire compartment wall between the terminal by heterogeneous network, usual way can use the H.323 method of ALG ALG (Application Layer Gatway), and the change firewall box makes it support ALG, but this method is owing to will analyze the packet load, increased the weight of the Processing tasks of fire compartment wall, influence the operation of network, become the potential network bottleneck; If simultaneously multi-layer fireproofing wall and NAT-PT are arranged, then the fire compartment wall of each on call path all must be upgraded and support the ALG function to change to conventional network equipment.
Summary of the invention
Technical problem to be solved by this invention is to propose a kind of heterogeneous network that passes through to carry out the H.323 system and method for terminal called, can make H.323 to carry out multimedia communication between the terminal in H.323 terminal in the IPv6 network and the IPv4 network.
For solving the problems of the technologies described above, the technical solution used in the present invention is passed through heterogeneous network and is carried out the H.323 method of terminal called, comprises step:
(1) in the IPv6 network, increases the intermediate conversion agent equipment; Be specially:
(11) in the IPv6 network, increase network address translation and protocol conversion device and agent equipment;
(12) act as agent the IPv6 address of equipment and the static mappings between the IPv4 address of network address translation and protocol conversion device;
(2) H.323 terminal in the IPv6 network and the H.323 terminal in the IPv4 network interconnect by described intermediate conversion agent equipment and carry out multi-media communication, particularly, described agent equipment receives from the message of terminal H.323, IPv4 address with described agent equipment static mappings in described network address translation and protocol conversion device is revised as in the IPv6 address of the H.323 terminal in this message sends this message to the IPv4 network; Described agent equipment receives the message from the IPv4 network, and the IPv6 address that described agent equipment is revised as in the IPv4 address in this message sends this message to terminal H.323.Wherein,
Described step (2) is specially:
(21) the H.323 endpoint registration in the IPv6 network is to described agent equipment;
(22) the H.323 endpoint registration in the described agent equipment replacement IPv6 network is to the gatekeeper of IPv4 network;
(23) H.323 terminal in the IPv6 network and the H.323 terminal in the IPv4 network, by described intermediate conversion agent equipment, connect mutually and carry out multimedia communication, particularly, described agent equipment receives from the message of terminal H.323, IPv4 address with described agent equipment static mappings in described network address translation and protocol conversion device is revised as in the IPv6 address of the H.323 terminal in this message sends this message to the IPv4 network; Described agent equipment receives the message from the IPv4 network, and the IPv6 address that described agent equipment is revised as in the IPv4 address in this message sends this message to terminal H.323.Wherein,
Described step (21) is specially:
(211) the H.323 terminal in the IPv6 network, the setting that changes described agent equipment is registered on this agent equipment.
Described step (22) is specially:
(221) after agent equipment was changed the source address in the gatekeeper's request message that receives the H.323 terminal transmission in the IPv6 network, by network address translation and protocol conversion device, the gatekeeper in the IPv4 network transmitted this message;
(222) agent equipment receives the gatekeeper after gatekeeper's acknowledge message of its transmission by network address translation and protocol conversion device, and after the conversion of the source address in this message, the H.323 terminal in the IPv6 network is transmitted;
(223) agent equipment receives the login request message that the H.323 terminal in the IPv6 network sends, and after the conversion of the source address in this message, by network address translation and protocol conversion device, the gatekeeper in the IPv4 network transmits this message;
(224) after agent equipment is received the registration confirmation message of the gatekeeper's response in the IPv4 network, after the conversion of the source address in this message, be transmitted to the H.323 terminal in the IPv6 network; If the gatekeeper responds registration reject message, agent equipment is directly transmitted this message.
Described step (23) is specially:
(2301A) the admittance solicited message of the H.323 terminal in the H.323 terminal call IPv4 network in the agent equipment reception IPv6 network, behind the source address modification in this information, the gatekeeper in the IPv4 network transmits;
(2302A) the H.323 terminal in the IPv6 network, after receiving the admission confirmation message of gatekeeper in the IPv4 network by the agent equipment forwarding, send the message that connects to agent equipment, after agent equipment is received this message that connects, the H.323 terminal of back in the IPv4 network revised in the address in this message make a call;
(2303A) the H.323 terminal responding call in the IPv4 network, agent equipment are received the H.323 terminal forwarding of back in the IPv6 network;
After (2304A) the H.323 terminal in the IPv4 network was received the calling that agent equipment sends, the gatekeeper in this network sent the admittance request message, the H.323 terminal loopback admission confirmation message of this gatekeeper in the IPv4 network;
(2305A) the H.323 terminal in the IPv4 network sends connection message to agent equipment, after agent equipment is received, the H.323 terminal of back in the IPv6 network is revised in the address in this message pass on;
(2306A) the H.323 terminal in the IPv6 network connects to agent equipment, and H.245 the H.323 terminal of agent equipment in the IPv4 network set up and connected, and carries out H.245 principal and subordinate's decision and capability negotiation;
(2307A) the H.323 terminal in the IPv6 network sends open logical channel message to agent equipment, after agent equipment is received, made amendment in address in this message, the H.323 terminal in the IPv4 network is passed on by network address translation and protocol conversion device;
(2308A) the H.323 terminal in the IPv4 network is responded open logical channel and is replied, and after agent equipment is received, made amendment in the address in this message, and the H.323 terminal in the IPv6 network is passed on;
(2309A) H.323 terminal repeating step (2307A), (2308A) in the IPv6 network equally of the H.323 terminal in the IPv4 network;
(2310A) between the H.323 terminal and agent equipment in the IPv6 network, H.323 set up media channel between the terminal in agent equipment and the IPv4 network, carry out media flow transmission.
Described step (23) also is specially:
(2301B) gatekeeper of H.323 terminal in this network in the IPv4 network initiates to admit request, calls out the H.323 terminal in the IPv6 network, and the gatekeeper replys;
(2302B) the H.323 terminal in the IPv4 network sends the message that connects to agent equipment, and after agent equipment was revised the address in this message, the H.323 terminal in the IPv6 network made a call;
After (2303B) agent equipment received that H.323 terminal call in the IPv6 network is responded, the H.323 terminal in the IPv4 network was transmitted;
(2304B) the H.323 terminal in the IPv6 network send to be admitted request to agent equipment, and agent equipment receives that the gatekeeper of back in the IPv4 network transmits, and this gatekeeper responds admission confirmation message and is transmitted to H.323 terminal in the IPv6 network by agent equipment;
(2305B) the H.323 terminal in the IPv6 network sends connection message to agent equipment, and agent equipment is forwarded to the H.323 terminal in the IPv4 network after the address in this message is revised;
(2306B) H.323 set up H.245 passage between the terminal respectively in H.323 terminal in the IPv4 network and agent equipment, agent equipment and the IPv6 network, H.323 carry out principal and subordinate's decision and capability negotiation by agent equipment between the terminal in H.323 terminal in the IPv6 network and the IPv4 network;
(2307B) the H.323 terminal in the IPv6 network sends open logical channel message to agent equipment, and after agent equipment was revised the address in this message, the H.323 terminal in the IPv4 network was passed on by network address translation and protocol conversion device;
(2308B) the H.323 terminal in the IPv4 network is responded open logical channel and is replied, and after agent equipment was received, after the address in this message revised, the H.323 terminal in the IPv6 network was passed on;
(2309B) H.323 terminal repeating step (2307B), (2308B) in the IPv6 network equally of the H.323 terminal in the IPv4 network;
(2310B) between the H.323 terminal and agent equipment in the IPv6 network, H.323 set up media channel between the terminal in agent equipment and the IPv4 network, carry out media flow transmission.
With the H.323 terminal substitution in the IPv4 network in the above-mentioned steps (23) is the multimedia conferencing unit of receiving the notice of meeting of operation system and obtaining the conference terminal tabulation, can realize adopting the multimedia conferencing unit to carry out point-to-multipoint and call out H.323 terminal in the IPv6 network.
A kind of heterogeneous network that passes through carries out the H.323 system of terminal called, comprises based on H.323 the IPv6 network and the IPv4 network of terminal, wherein,
In the IPv6 network, be provided with the intermediate conversion agent equipment;
H.323 terminal in the IPv6 network is by this intermediate conversion agent equipment, is connected with H.323 terminal in the IPv4 network;
Wherein, described intermediate conversion agent equipment comprises network address translation and protocol conversion device and agent equipment;
Described agent equipment be arranged in described network address translation and protocol conversion device and the described IPv6 network H.323 between the terminal equipment; Described IPv6 network and IPv4 network are by this network address translation and protocol conversion device interconnection;
Pass through agent equipment, conversion of H.323 terminal based traversal network address and protocol conversion device in the IPv6 network, connect with H.323 terminal in the IPv4 network and carry out media flow transmission, particularly, described agent equipment receives the message from the H.323 terminal in the IPv6 network, IPv4 address with described agent equipment static mappings in described network address translation and protocol conversion device is revised as in the IPv6 address of the H.323 terminal in this message sends this message to the IPv4 network; Described agent equipment receives the message from the IPv4 network, and the IPv6 address that described agent equipment is revised as in the IPv4 address in this message sends this message to terminal H.323.
Compared with prior art, the present invention is by adopting the mode of agency+network address translation and protocol conversion device, can be under the situation that does not change former IPv4 equipment and network design, only need in the IPv6 network, to increase network address translation and protocol conversion device and agent equipment, with regard to the terminal problem of directly carrying out multi-media communication H.323 in can fine solution heterogeneous network.
Description of drawings
Fig. 1 is H.323 terminal and an external IP v4H.323 terminal called sketch plan in the IPv6 network.
Fig. 2 is the H.323 terminal called sketch plan in IPv6H.323 terminal equipment and the opposite end IPv6 network.
Fig. 3 is IPv6H.323 terminal equipment RAS register flow path figure.
Fig. 4 is a terminal flow chart H.323 in the H.323 terminal call v4 network in the IPv6 network.
Fig. 5 is a terminal flow chart H.323 in the H.323 terminal call v6 network in the IPv4 network.
Fig. 6 is that the MCU mode point-to-multipoint in the IPv4 network is called out in the IPv6 network H.323 terminal flow chart.
Embodiment
Be described in further detail below in conjunction with the enforcement of accompanying drawing technical scheme.
Core concept of the present invention is: increase a H.323 agency in the IPv6 network, H.323 the agency adopts Xin Lingdaili and Media proxy mode to realize multimedia services such as voice and video are passed through the functional entity technology of v4/v6 network, H.323 there is overall unique IPv4 address of a NAT-PT device map in acting server, H.323 H.323 the agency will flow and all be forwarded to NAT-PT and handle, angle from the user, H.323 acting server is to the user, equipment and network are transparent, and concrete job step mainly comprises:
H.323 the first step does agency's v6 address and the static mappings between the v4 address at NAT-PT equipment.
Second step, for the terminal in the IPv6 network, can regard agency H.323 as a gatekeeper, H.323 the setting that terminal only need change the gatekeeper is registered on the acting server just passable.
The 3rd step, H.323 acting server replaces on the gatekeeper of endpoint registration in the IPv4 network, because it has solved the conversion of IPv6 address to the v4 address intelligently, the log-on message that demonstrates on the gatekeeper is the IPv4 address and the port of H.323 acting server mapping.
In the 4th step, by acting server H.323, the terminal in the IPv6 network has been passed through the firewall box between NAT-PT or v4/v6 fully, with miscellaneous equipment in the IPv4 network (as the gatekeeper, the agency, terminal or multipoint control unit etc.) connect, guarantee that voice and video communication is unblocked.
What need here to propose is, for the H.323 terminal in the IPv4 public network, does not need to increase H.323 agent equipment in the IPv4 network, and their registration process remains directly the gatekeeper's equipment in the IPv4 network and registers.
1.IPv6 the H.323 terminal RAS register flow path in the network
H.323 terminal RAS (registration in the IPv6 network, admission, status) register flow path has wherein comprised the address transition flow process of all signaling messages that may use as shown in Figure 3 in terminal RAS registration process H.323, rather than a concrete complete registration process.All addresses described in this figure are the address in the message load in the RAS registration process, rather than the IP layer address.Each step process description is as follows:
The first step, the gatekeeper that the agency receives the H.323 terminal equipment T1 transmission in the IPv6 network asks GRQ (gatekeeperrequest) message, T1IPv6 address in the message is revised as the IPv4 address of agent equipment static mappings in NAT-PT, by NAT-PT equipment, the gatekeeper in the IPv4 network transmits this message afterwards.
Second step, the gatekeeper sends gatekeeper acknowledge message GCF (gatekeeper confirmation) to H.323 acting on behalf of mapping v4 address, undertaken arriving H.323 agency after the address transition by NAT-PT, after agent equipment receives this message, with the source address in the message load is the IPv6 address of gatekeeper IPv4 address transition for agency itself, transmit to T1, if that the gatekeeper responds is gatekeeper's refuse information GRJ (gatekeeper reject), do not need the modified address form, directly be transmitted to the T1 terminal equipment.
The 3rd step, the agency receives the login request message RRQ (registration request) that T1 sends, is the IPv4 address of the static mappings of agency own with source address in the message by the T1IPv6 address transition, and by NAT-PT equipment, the gatekeeper in the IPv4 network transmits this message afterwards.
In the 4th step, the gatekeeper responds accreditation verification RCF (registration confirmation) message and gives H.323 agent equipment, after the agency receives this message, is agency's IPv6 address itself with source address by gatekeeper IPv4 address transition, is transmitted to H.323 terminal T1; If the gatekeeper responds RRJ (registration reject) message, the agency does not change, and directly transmits.
In the 5th step, the agency receives ARQ (admission request) message of T1, with the IPv4 address that agency's mapping is revised as in the T1IPv6 address in the message, transmits to the gatekeeper.
In the 6th step, the gatekeeper responds ACF (admission confirmation) message, and the agency is revised as Agent IP v6 address with the terminal called address in the message, transmits to T1; If the gatekeeper responds ARJ (admission reject) message, the agency directly transmits.
In the 7th step, the agency receives gatekeeper's IRQ (information request) message, and agency's IPv6 address itself is revised as in the IPv4 address of the gatekeeper in the message, transmits to T1.
In the 8th step, the agency receives IRR (the information request response) message of terminal T1, and the corresponding IPv4 mapping address of agency is revised as in the T1IPv6 address in the message, transmits to the gatekeeper.
In the 9th step, the agency receives BRQ (the bandwidth change request) message of T1, transmits to the gatekeeper.
In the tenth step, the agency receives BCF/BRJ (the bandwidth change confirmation/bandwidth changereject) message that the gatekeeper responds, and directly transmits to T1.
In the 11 step, the agency receives DRQ (disengage request) message of T1, directly transmits to the gatekeeper by NAT-PT.
In the 12 step, the agency receives gatekeeper's DCF/DRJ (disengage confirmation/disengage request reject) message, directly transmits to T1.
In the 13 step, the agency receives gatekeeper's DRQ message, transmits to T1
In the 14 step, the agency receives the DCF message of T1, transmits to the gatekeeper.
In the 15 step, the agency receives URQ (unregister request) message of T1, and the source address in the message is revised as agency's mapping IPv4 address by the IPv6 address of T1, transmits to the gatekeeper by NAT-PT.
In the 16 step, the agency receives gatekeeper's UCF/URJ (unregister confirmation/unregister reject) message, transmits to T1.
In the 17 step, the agency receives gatekeeper's URQ message, and the source address in the message is revised as agency's IPv6 address itself by gatekeeper's IPv4 address, transmits to T1.
In the 18 step, the agency receives the UCF message of T1, transmits to the gatekeeper by NAT-PT equipment.
2.IPv6 the terminal of H.323 terminal in the IPv4 network in the network makes a call
With reference to shown in Figure 1, the terminal of H.323 terminal in the IPv4 network in the IPv6 network makes a call.The flow process of H.323 terminal T2 in the H.323 terminal T1 calling IPv4 network in the IPv6 network as shown in Figure 4, terminal T1 carries out the RAS registration by the gatekeeper who H.323 acts on behalf of in the IPv4 network, make a call afterwards, solid line among the figure is the message that makes a call, dotted line is represented response message, and it is as described below specifically to call out implementing procedure:
The first step, the calling terminal T1 at first terminal T2 in the IPv4 network makes a call, send and admit request ARQ to H.323 acting on behalf of, source address in the message is the IPv6 address of T1, after the agency receives ARQ, with the source address modification in the message load is agency's mapping IPv4 address itself, and transmits to the gatekeeper.
In second step, the gatekeeper responds admission confirmation ACF message to the agency, carries terminal called T2 address in the message load, and the agency is revised as Agent IP v6 address to the destination address domain in the ACF message load of receiving by the IPv4 address of T2, and is transmitted to T1.
In the 3rd step, T1 and agency connect, and send the setup message that connects to the agency, source address is the T1IPv6 address, after the agency receives setup message, the source address modification in the message load for agency's mapping IPv4 address, is made a call to T2 according to ticket call information.
In the 4th step, T2 responding call process call proceeding transmits to T1 after the agency receives.
In the 5th step, T2 sends ARQ message after receiving and acting on behalf of the calling of sending to the gatekeeper.
In the 6th step, the gatekeeper is to T2 loopback ACF message, and the T1 destination address domain in the message is Agent IP v4 address.
In the 7th step, after T2 receives gatekeeper ACF message, connect connect message to H.323 acting on behalf of to send, H.245 address in the message is Agent IP v4 address, after the agency receives the connect message of T2, Agent IP v6 address is revised as in the H.245 address in the message, passes on to T1 then.
In the 8th step, T1 connects to the agency, and H.245 the agency sets up to T2 and connect, and carries out H.245 principal and subordinate's decision and capability negotiation.
The 9th step, T1 sends open logical channel OLC (H.245 openLogicalChannel message) message to the agency, oppositely the control channel address is the T1IPv6 address, after the agency receives this message, agency's mapping IPv4 address is revised as in reverse control channel address, passes on to T2 by NAT-PT.
In the tenth step, T2 responds open logical channel and replys OLCACK, and channel address is the T2IPv4 address, after the agency receives, channel address is revised as Agent IP v6 address, passes on to T1.
In the 11 step, T2 is equally to T1 repeating step nine, ten.
The 12 step, between T1 and the agency, set up media channel between agency and the T2, carry out media flow transmission.
3.IPv4 the terminal of H.323 terminal in the IPv6 network in the network makes a call
With reference to shown in Figure 1, the terminal of H.323 terminal in the IPv6 network in the IPv4 network makes a call.The flow process of H.323 terminal T1 in the H.323 terminal T2 calling IPv6 network in the IPv4 network as shown in Figure 5, terminal T1 carries out the RAS registration by the gatekeeper who H.323 acts on behalf of in the IPv4 network, solid line among the figure is the message that makes a call, dotted line is represented response message, and it is as described below specifically to call out implementing procedure:
The first step, T2 initiates ARQ, calls out T1.
In second step, the gatekeeper replys H.323 agency's mapping IPv4 address.
In the 3rd step, T2 and agency connect, and send setup message, and source address is agency IPv6 address own by the T2IPv4 address and transmits to T1 in the agents modify message load.
In the 4th step, T1 responds callproceeding to the agency, and the agency transmits to T2.
In the 5th step, T1 sends to the agency and replys ARQ, and the agency transmits to the gatekeeper.
In the 6th step, the agency transmits to T1 after receiving the ACF that the gatekeeper responds.
In the 7th step, T1 sends connect message to the agency, in the message H.245 the address be the IPv6 address of T1, the agency is revised as the IPv4 address of acting on behalf of the NAT mapping with this address, and is forwarded to T2.
In the 8th step, T2 and agency set up H.245 passage respectively between agency and the T1, carry out principal and subordinate's decision and capability negotiation by the agency between T1 and the T2.
In the 9th step, T1 sends OLC message to the agency, and oppositely the control channel address is the T1IPv6 address, after the agency receives this message, agency's mapping IPv4 address is revised as in reverse control channel address, passes on to T2 by NAT-PT.
In the tenth step, T2 responds OLCACK, and channel address is the T2IPv4 address, after the agency receives, channel address is revised as Agent IP v6 address, passes on to T1.
In the 11 step, T2 is equally to T1 repeating step nine, ten.
The 12 step, between T1 and the agency, set up media channel between agency and the T2, carry out media flow transmission.
4.MCU the mode point-to-multipoint is called out the H.323 terminal in the IPv6 network
The flow process of H.323 terminal T1 in MCU in the IPv4 network (multimedia conferencing unit) the calling IPv6 network as shown in Figure 6, terminal T1 carries out the RAS registration by the gatekeeper who H.323 acts on behalf of in the IPv4 network, at first MCU receives the notice of meeting of operation system, obtain the terminal list of meeting, terminal in the difference call-conference, this process concerning H.323 agency and the IPv6 network in the T1 terminal, identical with terminal flow process in the terminal call v6 network in the v4 network.
The present invention has used the mode of NAT-PT+H.323 agent equipment, make in the isolated IPv6 site network H.323 equipment can with the H.323 entity in the IPv4 backbone network, H.323 equipment in the isolated IPv6 site of opposite end carries out multi-media communication, this method makes full use of existing multi-media communication equipment, do not change IPv4 network topology and existing equipment function, only needing increases new H.323 agent functionality, and extensibility is good, and efficient is than higher simultaneously.
Here it is to be noted, several specific embodiments among the present invention have just been enumerated a few example of the present invention, in all the other for example same IPv6 networks H.323 between the terminal, the H.323 multi-media communication of (see figure 2)s such as (middle span IPv4 backbone networks) between the terminal between IPv6 network and another IPv6 network, can adopt inventive concept, use the NAT-PT+H.323 agent equipment to implement, idiographic flow is similar, just gives unnecessary details no longer one by one here.In a word, use design philosophy of the present invention and any equivalent transformation thereof to carry out the H.323 multi-media communication between the terminal, all should belong to protection scope of the present invention.
Claims (8)
1. one kind is passed through heterogeneous network and carries out the H.323 method of terminal called, it is characterized in that, comprises step:
(1) in the IPv6 network, increases the intermediate conversion agent equipment; Be specially:
(11) in the IPv6 network, increase network address translation and protocol conversion device and agent equipment;
(12) act as agent the IPv6 address of equipment and the static mappings between the IPv4 address of network address translation and protocol conversion device;
(2) H.323 terminal in the IPv6 network and the H.323 terminal in the IPv4 network interconnect by described intermediate conversion agent equipment and carry out multi-media communication, particularly, described agent equipment receives from the message of terminal H.323, IPv4 address with described agent equipment static mappings in described network address translation and protocol conversion device is revised as in the IPv6 address of the H.323 terminal in this message sends this message to the IPv4 network; Described agent equipment receives the message from the IPv4 network, and the IPv6 address that described agent equipment is revised as in the IPv4 address in this message sends this message to terminal H.323.
2. a kind of heterogeneous network that passes through according to claim 1 carries out the H.323 method of terminal called, it is characterized in that described step (2) is specially:
(21) the H.323 endpoint registration in the IPv6 network is to described agent equipment;
(22) the H.323 endpoint registration in the described agent equipment replacement IPv6 network is to the gatekeeper of IPv4 network;
(23) H.323 terminal in the IPv6 network and the H.323 terminal in the IPv4 network, by described intermediate conversion agent equipment, connect mutually and carry out multimedia communication, particularly, described agent equipment receives from the message of terminal H.323, IPv4 address with described agent equipment static mappings in described network address translation and protocol conversion device is revised as in the IPv6 address of the H.323 terminal in this message sends this message to the IPv4 network; Described agent equipment receives the message from the IPv4 network, and the IPv6 address that described agent equipment is revised as in the IPv4 address in this message sends this message to terminal H.323.
3. a kind of heterogeneous network that passes through according to claim 2 carries out the H.323 method of terminal called, it is characterized in that described step (21) is specially:
(211) the H.323 terminal in the IPv6 network, the setting that changes described agent equipment is registered on this agent equipment.
4. a kind of heterogeneous network that passes through according to claim 2 carries out the H.323 method of terminal called, it is characterized in that described step (22) is specially:
(221) after agent equipment was changed the source address in the gatekeeper's request message that receives the H.323 terminal transmission in the IPv6 network, by network address translation and protocol conversion device, the gatekeeper in the IPv4 network transmitted this message;
(222) agent equipment receives the gatekeeper after gatekeeper's acknowledge message of its transmission by network address translation and protocol conversion device, and after the conversion of the source address in this message, the H.323 terminal in the IPv6 network is transmitted;
(223) agent equipment receives the login request message that the H.323 terminal in the IPv6 network sends, and after the conversion of the source address in this message, by network address translation and protocol conversion device, the gatekeeper in the IPv4 network transmits this message;
(224) after agent equipment is received the registration confirmation message of the gatekeeper's response in the IPv4 network, after the conversion of the source address in this message, be transmitted to the H.323 terminal in the IPv6 network; If the gatekeeper responds registration reject message, agent equipment is directly transmitted this message.
5. H.323 a kind of heterogeneous network that passes through according to claim 2 carries out that the method for terminal called is characterized in that, described step (23) is specially:
(2301A) the admittance solicited message of the H.323 terminal in the H.323 terminal call IPv4 network in the agent equipment reception IPv6 network, behind the source address modification in this information, the gatekeeper in the IPv4 network transmits;
(2302A) the H.323 terminal in the IPv6 network, after receiving the admission confirmation message of gatekeeper in the IPv4 network by the agent equipment forwarding, send the message that connects to agent equipment, after agent equipment is received this message that connects, the H.323 terminal of back in the IPv4 network revised in the address in this message make a call;
(2303A) the H.323 terminal responding call in the IPv4 network, agent equipment are received the H.323 terminal forwarding of back in the IPv6 network;
After (2304A) the H.323 terminal in the IPv4 network was received the calling that agent equipment sends, the gatekeeper in this network sent the admittance request message, the H.323 terminal loopback admission confirmation message of this gatekeeper in the IPv4 network;
(2305A) the H.323 terminal in the IPv4 network sends connection message to agent equipment, after agent equipment is received, the H.323 terminal of back in the IPv6 network is revised in the address in this message pass on;
(2306A) the H.323 terminal in the IPv6 network connects to agent equipment, and H.245 the H.323 terminal of agent equipment in the IPv4 network set up and connected, and carries out H.245 principal and subordinate's decision and capability negotiation;
(2307A) the H.323 terminal in the IPv6 network sends open logical channel message to agent equipment, after agent equipment is received, made amendment in address in this message, the H.323 terminal in the IPv4 network is passed on by network address translation and protocol conversion device;
(2308A) the H.323 terminal in the IPv4 network is responded open logical channel and is replied, and after agent equipment is received, made amendment in the address in this message, and the H.323 terminal in the IPv6 network is passed on;
(2309A) H.323 terminal repeating step (2307A), (2308A) in the IPv6 network equally of the H.323 terminal in the IPv4 network;
(2310A) between the H.323 terminal and agent equipment in the IPv6 network, H.323 set up media channel between the terminal in agent equipment and the IPv4 network, carry out media flow transmission.
6. H.323 a kind of heterogeneous network that passes through according to claim 2 carries out that the method for terminal called is characterized in that, described step (23) is specially:
(2301B) gatekeeper of H.323 terminal in this network in the IPv4 network initiates to admit request, calls out the H.323 terminal in the IPv6 network, and the gatekeeper replys;
(2302B) the H.323 terminal in the IPv4 network sends the message that connects to agent equipment, and after agent equipment was revised the address in this message, the H.323 terminal in the IPv6 network made a call;
After (2303B) agent equipment received that H.323 terminal call in the IPv6 network is responded, the H.323 terminal in the IPv4 network was transmitted;
(2304B) the H.323 terminal in the IPv6 network send to be admitted request to agent equipment, and agent equipment receives that the gatekeeper of back in the IPv4 network transmits, and this gatekeeper responds admission confirmation message and is transmitted to H.323 terminal in the IPv6 network by agent equipment;
(2305B) the H.323 terminal in the IPv6 network sends connection message to agent equipment, and agent equipment is forwarded to the H.323 terminal in the IPv4 network after the address in this message is revised;
(2306B) H.323 set up H.245 passage between the terminal respectively in H.323 terminal in the IPv4 network and agent equipment, agent equipment and the IPv6 network, H.323 carry out principal and subordinate's decision and capability negotiation by agent equipment between the terminal in H.323 terminal in the IPv6 network and the IPv4 network;
(2307B) the H.323 terminal in the IPv6 network sends open logical channel message to agent equipment, and after agent equipment was revised the address in this message, the H.323 terminal in the IPv4 network was passed on by network address translation and protocol conversion device;
(2308B) the H.323 terminal in the IPv4 network is responded open logical channel and is replied, and after agent equipment was received, after the address in this message revised, the H.323 terminal in the IPv6 network was passed on;
(2309B) H.323 terminal repeating step (2307B), (2308B) in the IPv6 network equally of the H.323 terminal in the IPv4 network;
(2310B) between the H.323 terminal and agent equipment in the IPv6 network, H.323 set up media channel between the terminal in agent equipment and the IPv4 network, carry out media flow transmission.
7. H.323 a kind of heterogeneous network that passes through according to claim 6 carries out that the method for terminal called is characterized in that: is the multimedia conferencing unit of receiving the notice of meeting of operation system and obtaining the conference terminal tabulation with the H.323 terminal substitution in the IPv4 network.
8. one kind is passed through heterogeneous network and carries out the H.323 system of terminal called, comprises based on H.323 the IPv6 network and the IPv4 network of terminal, it is characterized in that:
In the IPv6 network, be provided with the intermediate conversion agent equipment;
H.323 terminal in the IPv6 network is by this intermediate conversion agent equipment, is connected with H.323 terminal in the IPv4 network;
Described intermediate conversion agent equipment comprises network address translation and protocol conversion device and agent equipment;
Described agent equipment be arranged in described network address translation and protocol conversion device and the described IPv6 network H.323 between the terminal; Described IPv6 network and IPv4 network are by this network address translation and protocol conversion device interconnection;
Pass through agent equipment, conversion of H.323 terminal based traversal network address and protocol conversion device in the IPv6 network, connect with H.323 terminal in the IPv4 network and carry out media flow transmission, particularly, described agent equipment receives the message from the H.323 terminal in the IPv6 network, IPv4 address with described agent equipment static mappings in described network address translation and protocol conversion device is revised as in the IPv6 address of the H.323 terminal in this message sends this message to the IPv4 network; Described agent equipment receives the message from the IPv4 network, and the IPv6 address that described agent equipment is revised as in the IPv4 address in this message sends this message to terminal H.323.
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| CN101710960A (en) * | 2009-08-06 | 2010-05-19 | 中兴通讯股份有限公司 | Method and system for realizing video conference |
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| CN104768076B (en) * | 2014-01-06 | 2019-05-03 | 腾讯科技（北京）有限公司 | Video broadcasting method and device |
| CN104660952B (en) * | 2015-03-04 | 2018-06-08 | 苏州科达科技股份有限公司 | Video conference communication method and system |
| CN111756782B (en) * | 2019-03-28 | 2023-03-14 | 比亚迪股份有限公司 | Message transmission system and method based on heterogeneous operating system and vehicle |
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