CN107659575A - A kind of broadband Cluster Multimedia functive and its session method - Google Patents
A kind of broadband Cluster Multimedia functive and its session method Download PDFInfo
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- CN107659575A CN107659575A CN201710949341.7A CN201710949341A CN107659575A CN 107659575 A CN107659575 A CN 107659575A CN 201710949341 A CN201710949341 A CN 201710949341A CN 107659575 A CN107659575 A CN 107659575A
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/65—Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/08—Trunked mobile radio systems
Abstract
The embodiment of the present invention, which discloses a kind of broadband Cluster Multimedia functive and its session method, this method, to be included：Extract source IP, source udp port, purpose IP and the purpose udp port of RTP user face data bags；Using source IP and source udp port as the first key value, using purpose IP and purpose udp port as the second key value, the conversation key of matching is searched in current session management table according to the first key value and the second key value, conversation key is the user plane IP and udp port that session corresponds to terminal called；Session value corresponding with the conversation key found is obtained from session management table, session management table includes the conversation key of each session and corresponding session value；The multimedia messages in RTP user face data bags are extracted, if multimedia messages are consistent with session value, RTP user face data bags are forwarded.This invention simplifies the conversation procedure between TCF and TMF, ensure that the forward efficiency of company-data bag, improves the transmission quality of company-data bag.
Description
Technical field
The present invention relates to broadband trunking communicating technology field, more particularly to a kind of broadband Cluster Multimedia functive and its meeting
Words method.
Background technology
With the fast development of the industries such as global public safety, government affairs, traffic, the energy, industry user is in traditional voice
It is extremely urgent for the demand of broadband wireless data business, multimedia cluster scheduling on the basis of cluster.LTE(Long Term
Evolution, Long Term Evolution) turn into the selection of wireless private network broadband technology with its technology and industrial advantage, based on LTE technologies
Broadband Clustering also turns into global radio private network development common recognition.China takes the lead in having carried out the broadband cluster B- based on LTE technologies
The standardization effort of TrunC (Broadband Trunking Communication, broadband cluster communication) technology, base oneself upon autonomous
Innovation, be closely connected sector application demand, and technology and industry development are rapid.Mono- stages of B-TrunC professional standard is being just at present
Formula is issued, and the head recommended as ITU (International Telecommunication Union, International Telecommunication Union)
The broadband cluster of individual PPDR (Public Protection and Disaster Relief, public protection and the disaster relief) connects in the air
Mouth standard.As Ministry of Industry and Information has issued wideband digital cluster private network frequency planning, B-TrunC obtains 1.4GHz and 1.8GHz frequency ranges
Policy support.B-TrunC systems have begun to be widely used in the industries such as public safety, government affairs, traffic, the energy at present.
In the cluster alliance specifications of B-trunc broadbands, the cluster core net framework scheme based on EPC system is defined, and
With a variety of isolations, refer to《Broadband cluster communication (B-TrunC) systems (of B-TrunC TR 001 based on LTE technologies
One stage) general technical requirement》.According to B-TrunC alliance standards, broadband cluster system core side network element includes TCF
(Trunking Control Function, clustered control functive), TMF (TrunkingMedia Function, cluster matchmaker
Body function body) increase network element newly.B-TrunC network architecture diagrams are as shown in Figure 1.
There is no unified standard, the RTP between existing TCF and TMF to the communication interface between TCF and TMF at present
(Real-time Transport Protocol, RTP) conversational mode, often using simultaneously in session management table
Middle source IP address, source port number, the mode of purpose IP address and destination slogan of searching is realized so that meeting between TCF and TMF
Words realize that logic is more complicated, and it is very low to result in company-data bag search efficiency, so as to cause packet congestion or production
Loss of raw packet etc., can not ensure the forward efficiency of packet transmission, influence transmission quality.
The content of the invention
In view of the above problems, the present invention provides a kind of width for overcoming above mentioned problem or solving the above problems at least in part
Band Cluster Multimedia functive and its session method, to simplify the conversation procedure between TCF and TMF, ensure company-data bag
Forward efficiency, improve the transmission quality of company-data bag.
One aspect of the present invention, there is provided a kind of session method of broadband Cluster Multimedia functive, including：
When receiving RTP user face data bags, the source IP of the RTP user face datas bag, source udp port, mesh are extracted
IP and purpose udp port；
Using the source IP and source udp port as the first key value, using the purpose IP and purpose udp port as second
Key value, and the session of matching is searched according to first key value and second key value in current session management table
Keyword, the conversation key are the user plane IP and udp port that session corresponds to terminal called；
Session value corresponding with the conversation key found, the session pipe are obtained from the session management table
Managing table includes the conversation key of each session and corresponding session value, and the session value is that multimedia corresponding to session is joined
Number；
The multimedia messages in the RTP user face datas bag are extracted, if the multimedia messages and the session value one
Cause, then the RTP user face datas bag is forwarded according to the purpose IP and purpose udp port.
Wherein, if the multimedia messages and the session value are inconsistent, methods described also includes：
The multimedia messages are encoded according to the coded format made an appointment, and according to the purpose IP and purpose
Udp port forwards to the RTP user face data bags after recompiling.
Wherein, before RTP user face data bags are received, methods described also includes：
The RTP conversation establishing request messages that clustered control functive TCF is sent are received, wherein, the RTP conversation establishings please
Message is asked to include session id, the user plane IP of terminal called and udp port, session multimedia parameter；
The user plane IP, udp port and session multimedia parameter of the terminal called are extracted, by the use of the terminal called
Family face IP and udp port as conversation key, using the multimedia messages as corresponding to session value, in the session management
Session entry corresponding to the session id is created in table；
Conversation establishing response message is sent to the TCF, session entry is carried in the conversation establishing response message
Create result.
Wherein, after the transmission conversation establishing response message to the TCF, in addition to：
The RTP session updates request messages that TCF is sent are received, the RTP session updates request message includes the meeting
Talk about ID, dispatching desk DC user plane IP and udp port；
The user plane IP and udp port of the DC is extracted, is searched according to the session id in the session management table pair
The session entry answered, the user plane IP and udp port of the DC are added in the session value of the session entry, to update meeting
Talk about list item；
Session updates response message is sent to the TCF, session entry is carried in the session updates response message
Update result.
Wherein, the RTP user face datas bag is carried out forwarding it according to the purpose IP and purpose udp port described
Afterwards, methods described also includes：
Compare the source IP and DC user plane IP；
If the source IP and the DC user plane IP are inconsistent, the purpose IP and the DC user plane are compared
IP；
If the purpose IP and DC user plane IP is inconsistent, according to the user plane IP and udp port of the DC,
The RTP user face datas bag is transmitted to DC.
Wherein, methods described also includes：
If the source IP is consistent with the user plane IP of the DC, or the purpose IP consistent with the user plane IP of the DC,
Then terminate this session data processing procedure.
Wherein, methods described also includes：
When receiving the RTP session deletion request messages that the TCF is sent, extract the RTP sessions and remove request message
The session id of middle carrying；
According to the session id carried in the RTP sessions deletion request message, searched in the session management table corresponding
Session entry and deletion；
Session deletion response message to the TCF, the session is sent to delete in response message and carry session entry
Delete result.
One aspect of the present invention, there is provided a kind of broadband Cluster Multimedia functive, the broadband Cluster Multimedia work(
Energy body includes：
Extraction module, for when receiving RTP user face data bags, extract the RTP user face datas bag source IP,
Source udp port, purpose IP and purpose udp port；
Enquiry module, for using the source IP and source udp port as the first key value, by the purpose IP and purpose
Udp port is as the second key value, and according to first key value and second key value in current session management table
The middle conversation key for searching matching, the conversation key are the user plane IP and udp port that session corresponds to terminal called；
Acquisition module, for obtaining session corresponding with the conversation key found from the session management table
Value, it is session that the session management table, which includes the conversation key of each session and corresponding session value, the session value,
Corresponding multimedia parameter；
Sending module, for extracting the multimedia messages in the RTP user face datas bag, if the multimedia messages with
The session value is consistent, then the RTP user face datas bag is forwarded according to the purpose IP and purpose udp port.
Wherein, the sending module, it is additionally operable to when the multimedia messages and the session value are inconsistent, according to advance
The coded format of agreement encodes to the multimedia messages, and newly organized according to the purpose IP and purpose udp port counterweight
RTP user face data bags after code are forwarded.
Wherein, the broadband Cluster Multimedia functive also includes receiving module and list item creation module：
Receiving module, for before the extraction module receives RTP user face data bags, receiving clustered control function
The RTP conversation establishing request messages that body TCF is sent, wherein, the RTP conversation establishings request message includes session id, is called
User plane IP and udp port, the session multimedia parameter of terminal；
List item creation module, for extracting the user plane IP, udp port and session multimedia parameter of the terminal called,
Using the user plane IP of the terminal called and udp port as conversation key, using multimedia messages meeting as corresponding to
Words value, session entry corresponding to the session id is created in the session management table；
The sending module, it is additionally operable to send conversation establishing response message to the TCF, the conversation establishing response message
In carry the establishment result of session entry.
The technical scheme provided in the embodiment of the present application, has the following technical effect that or advantage：
Cluster Multimedia functive in broadband provided in an embodiment of the present invention and its session method, by self-defined T3 interfaces and
Session management table carries out the session management between TMF and TCF and the data transfer between terminal and/or dispatching desk, wherein,
The conversation key of TMF session management table only creates a list item with the user plane IP and udp port of terminal called combination,
An other list item need not be created as conversation key using caller IP and udp port, therefore can not only save half table
Item management, and during data transfer, when caller changes, without modification list item, beneficial to user plane high speed forward.This
Session management table in inventive embodiments supports the session initiated by terminal and/or dispatching desk simultaneously, when carrying out list item management
Without doscrimination.This invention simplifies the conversation procedure between TCF and TMF, the forwarding for improving the transmission of company-data bag is imitated
Rate, ensure the transmission quality of company-data bag.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of specification, and in order to allow above and other objects of the present invention, feature and advantage can
Become apparent, below especially exemplified by the embodiment of the present invention.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, it is various other the advantages of and benefit it is common for this area
Technical staff will be clear understanding.Accompanying drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And in whole accompanying drawing, identical part is denoted by the same reference numerals.In the accompanying drawings：
Fig. 1 is the schematic diagram of the B-TrunC network architecture diagrams proposed in background technology；
Fig. 2 is the TMF system context schematic diagrames that the embodiment of the present invention proposes；
Fig. 3 is that a kind of function for broadband Cluster Multimedia functive that the embodiment of the present invention proposes divides schematic diagram；
Fig. 4 is the SGi protocol stack of the interface schematic diagrames for the broadband Cluster Multimedia functive that the embodiment of the present invention proposes；
Fig. 5 is the D-U protocol stack of the interface schematic diagrames for the broadband Cluster Multimedia functive that the embodiment of the present invention proposes；
Fig. 6 is the T3 protocol stack of the interface schematic diagrames for the broadband Cluster Multimedia functive that the embodiment of the present invention proposes；
Fig. 7 is the schematic diagram that the T3 interface messages that the embodiment of the present invention proposes define；
Fig. 8 is the flow chart for the T3 interface messages that the embodiment of the present invention proposes；
Fig. 9 is the schematic diagram for the RTP session management tables that the embodiment of the present invention proposes；
A kind of flow chart of the session method for broadband Cluster Multimedia functive that Figure 10 embodiment of the present invention proposes；
Figure 11 is a kind of flow of the session method for broadband Cluster Multimedia functive that another embodiment of the present invention proposes
Figure；
Figure 12 is a kind of structured flowchart for broadband Cluster Multimedia functive that the embodiment of the present invention proposes.
Embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although the disclosure is shown in accompanying drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
Limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
Completely it is communicated to those skilled in the art.
Fig. 2 diagrammatically illustrates the TMF system context schematic diagrames of proposition of the embodiment of the present invention.As shown in Fig. 2 in this hair
In bright, clustered control functive TCF is communicated by T3 interfaces and TMF, and control TMF carries out the establishment of RTP sessions, changes and delete
Remove；TMF carries out RTP user face data forwardings by SGi interfaces and synthesized gateway xGW；TMF and DC (Dispatching
Client, dispatching desk) between pass through D-U interfaces carry out RTP user face data forwardings.Wherein, the T3 interfaces between TMF and TCF
There is no standard agreement regulation, realized using self-defined T3 interfaces so that the message transmission between TMF and TCF becomes simple height
Effect.
The function division that Fig. 3 diagrammatically illustrates a kind of broadband Cluster Multimedia functive of proposition of the embodiment of the present invention is shown
It is intended to, as shown in figure 3, TMF is divided into 3 major parts by function：RTP user planes hop 101, RTP session management matrix sections
102nd, T3 interface communications administrative section 103.
Wherein, RTP user planes hop, it is main to be responsible for receiving the RTP packets that xGW or DC is sent, Ran Houcha
RTP session management tables are looked for, the routing forwarding of next step is carried out according to list item.
RTP session management matrix sections, mainly realize the management of RTP session contexts in the form of list item, to other two
Funtion part provides list item establishment, modification, inquiry and deletion action.In the present embodiment, can specifically HASH tables be used to realize
RTP session management tables, realize the management of RTP session contexts in the form of HASH list items.
T3 interface communication management, the main message communicating provided between TMF and TCF is realized, using self-defined message form.
When receiving TCF message, establishment that the interface that calls RTP session managements tables to provide according to type of message conversates, modification and
Deletion action.
Fig. 4 is the SGi protocol stack of the interface schematic diagrames for the broadband Cluster Multimedia functive that the embodiment of the present invention proposes, is such as schemed
Shown in 4, SGi Application of Interface layer protocols are RTP, and transport layer protocol is UDP；Fig. 5 is the broadband cluster that the embodiment of the present invention proposes
The D-U protocol stack of the interface schematic diagrames of multimedia functionality, as shown in figure 5, D-U mouth application layer protocols are RTP, transport layer protocol is
UDP；Fig. 6 is the T3 protocol stack of the interface schematic diagrames for the broadband Cluster Multimedia functive that the embodiment of the present invention proposes, such as Fig. 6 institutes
Show, T3 Application of Interface layer protocol uses custom protocol (SDP, Self-define Protocol), and transport layer protocol is TCP.
Fig. 7 is the schematic diagram that the T3 interface messages that the embodiment of the present invention proposes define, as shown in fig. 7, T3 interfaces are fixed altogether
Adopted 4 message：RTP conversation establishing message RtpSessionCreatorMsg, RTP session updates message
Message RtpSessionDestroyMsg, RTP conversational response message is deleted in RtpSessionUpdateMsg, RTP session
RtpSessionMsgAck。
Fig. 8 is the flow chart for the T3 interface messages that the embodiment of the present invention proposes, as shown in figure 8, T3 interface messages flow has
Body is as follows：
Create session：TMF receives the RTP conversation establishing request message RtpSessionCreatorMsg that TCF is sent, its
In, the RTP conversation establishings request message includes session id, the user plane IP of terminal called and udp port, session multimedia is joined
Number；
The TMF extracts the user plane IP and udp port of the terminal called in the RTP conversation establishings request message
As hash key, using multimedia parameter as hash value, RTP session management table interfaces are called, are created in hash tables
List item, hash value are stored in list item；
The TMF beams back conversation establishing response message RtpSessionMsgAck to the TCF, the conversation establishing response
Conversation establishing result success or failure is taken in message.
More new session：TMF receives the RTP session updates request messages that TCF is sent, the RTP session updates request message
In include session id, DC user plane IP and udp port；
After TMF receives the RTP session updates request message RtpSessionUpdateMsg, the RTP sessions are extracted more
The user plane IP and udp port of DC in new request message RtpSessionUpdateMsg, disappears according to the request of RTP session updates
The session id in RtpSessionUpdateMsg is ceased, above created hash list items is found, DC information is added to hash
Inside value；
TMF beams back session updates response message RtpSessionUpdateMsg to TCF, and session updates knot is taken in message
Fruit success or failure.
TMF receives the RTP session deletion request messages RtpSessionMsgAck that TCF is sent, and the RTP sessions are except request
Message RtpSessionMsgAck includes session id.
Delete session：After TMF receives the RTP sessions deletion request message RtpSessionDestroyMsg, according to institute
The session id in RTP session deletion request messages RtpSessionDestroyMsg is stated, finds above created hash list items
And delete.
TMF beams back the RTP sessions and deletes response message RtpSessionMsgAck to TCF, and taking session in message deletes
Division result success or failure.
Table 1 is the RTP session management tables that the embodiment of the present invention proposes, RTP session managements table is realized using HASH tables, specifically
It is as follows：
The RTP session management tables of table 1
| Conversation key (hash key) | Session value (hash value) |
| RtpSessionKey1 | RtpSessionltem 1 |
| RtpSessionKey 2 | RtpSessionltem 2 |
| 。。。 | 。。。 |
| RtpSessiOnKey n | RtpSessionltem n |
Fig. 9 diagrammatically illustrates the schematic diagram of the RTP session management tables of the embodiment of the present invention, as shown in figure 9, the present embodiment
In, RTP session managements table is realized using HASH tables, conversation keys of the hash key as session management table
RtpSessionKey, it is made up of the user plane IP and udp port of terminal called, and hash value are as session management table
Session value RtpSessionItem, it is made up of console DC user plane IP, udp port, user plane multimedia parameter.TMF
RTP session managements use HASH table management, list item is searched rapidly and efficiently, beneficial to user plane high speed forward.
Figure 10 diagrammatically illustrates a kind of session method of broadband Cluster Multimedia functive of proposition of the embodiment of the present invention
Flow chart.Reference picture 10, the embodiment of the present invention specifically includes following steps：
S201, when receiving RTP user face data bags, extract source IP, the source UDP ends of the RTP user face datas bag
Mouth, purpose IP and purpose udp port.
S202, using the source IP and source udp port as the first key value, the purpose IP and purpose udp port are made
For the second key value, and matching is searched in current session management table according to first key value and second key value
Conversation key, the conversation key is that session corresponds to the user plane IP and udp port of terminal called.
S203, session value corresponding with the conversation key found is obtained from the session management table, it is described
Session management table includes the conversation key of each session and corresponding session value, and the session value is more corresponding to session
Media parameter.
Multimedia messages in S204, the extraction RTP user face datas bag, if the multimedia messages and the session
Value is consistent, then the RTP user face datas bag is forwarded according to the purpose IP and purpose udp port.
In an alternative embodiment of the invention, if the multimedia messages and the session value are inconsistent, methods described is also
Comprise the following steps：
The multimedia messages are encoded according to the coded format made an appointment, and according to the purpose IP and purpose
Udp port forwards to the RTP user face data bags after recompiling.
In actual applications, before RTP user face data bags are received, it is corresponding to be additionally included in establishment in session management table
Session entry the step of, be implemented as follows：
The RTP conversation establishing request messages that clustered control functive TCF is sent are received, wherein, the RTP conversation establishings please
Message is asked to include session id, the user plane IP of terminal called and udp port, session multimedia parameter；
The user plane IP, udp port and session multimedia parameter of the terminal called are extracted, by the use of the terminal called
Family face IP and udp port as conversation key, using the multimedia messages as corresponding to session value, in the session management
Session entry corresponding to the session id is created in table；
Conversation establishing response message is sent to the TCF, session entry is carried in the conversation establishing response message
Result is created, result is created and specifically includes successfully, unsuccessfully.
Further, after the transmission conversation establishing response message to the TCF, in addition to session entry renewal
Step, it is implemented as follows：
The RTP session updates request messages that TCF is sent are received, the RTP session updates request message includes the meeting
Talk about ID, dispatching desk DC user plane IP and udp port；
The user plane IP and udp port of the DC is extracted, is searched according to the session id in the session management table pair
The session entry answered, the user plane IP and udp port of the DC are added in the session value of the session entry, to update meeting
Talk about list item；
Session updates response message is sent to the TCF, session entry is carried in the session updates response message
Result is updated, renewal result specifically includes successfully, unsuccessfully.
Accordingly, the RTP user face datas bag is forwarded according to the purpose IP and purpose udp port described
Afterwards, methods described is further comprising the steps of：
Compare the source IP and DC user plane IP；
If the source IP is consistent with the user plane IP of the DC, terminate this session data processing procedure；If the source
IP and DC user plane IP is inconsistent, then compares the purpose IP and the DC user plane IP；
If the purpose IP and DC user plane IP is inconsistent, according to the user plane IP and udp port of the DC,
The RTP user face datas bag is transmitted to DC；
If purpose IP is consistent with the user plane IP of the DC, terminate this session data processing procedure.
In embodiments of the present invention, methods described also includes the step of session entry is deleted, and is implemented as follows：
When receiving the RTP session deletion request messages that the TCF is sent, extract the RTP sessions and remove request message
The session id of middle carrying；
According to the session id carried in the RTP sessions deletion request message, searched in the session management table corresponding
Session entry and deletion；
Session deletion response message to the TCF, the session is sent to delete in response message and carry session entry
Result is deleted, result is deleted and specifically includes successfully, unsuccessfully.
Below by session method of the specific embodiment to broadband Cluster Multimedia functive in actual applications
Implementation process is described in detail, and session management table is realized using hash tables in the present embodiment.As shown in figure 11, specifically such as
Under：
Step 1：Session is created, including：RTP conversation establishing request messages, message are sent to TMF according to operation flow TCF
In with session id, the user plane IP of terminal called and udp port, session multimedia relevant parameter；TMF receives RTP sessions wound
After building request message, the user plane IP and udp port of the terminal called in extraction message are as hash key, with more matchmakers in message
Body parameter calls RTP session management tables interface to create hash list items, hash value is stored in list item as hash value
In；TMF beams back conversation establishing response message to TCF, and conversation establishing result success or failure is taken in message.
Wherein, the key value of searching of TMF HASH tables uses the combination of called IP and udp port, and only creates one
Item list item, without creating an other list item as key by the use of caller IP and udp port simultaneously, it first can save half list item
Management, second when caller change, without modification list item.
RTP session managements support the session of the session initiated by terminal and DC initiations simultaneously, and list item management is unanimously without poor
Do not treat.
Step 2：More new session, including：RTP session updates request messages, message are sent to TMF according to operation flow TCF
In with session id, DC user plane IP and udp port；After TMF receives RTP session updates request messages, extract in message
DC user plane IP and udp port, according to the session id in message, above created hash list items are found, DC information
It is added to inside hash value；TMF beams back session updates response message to TCF, and the success of session updates result is taken in message
Or failure.
Step 3：After TMF RTP user plane transport modules receive RTP user's bread, IP layers and UDP are carried out first
Layer decoder, source IP, source udp port and purpose IP, purpose udp port are formed two hash key respectively, because this data
It is surrounded by and may be from caller, it is also possible to from being called, can not be judged according to source and destination IP, and the hash key of hash list items
That when creating is called IP and udp port, so two hash key are organized, if this bag is caller or called hair
Come over, there must be a hash key to find corresponding hash value.Here it is why we need not create two
The reason for hash list items, save a half space and management work.
Step 4：Hash tables are searched respectively with the two hash key, and hash table structures are as shown in Figure 7.If do not find
Corresponding hash value, then it is not the data in any call to show this packet, exits handling process；If it is found,
Then enter step 5.
Step 5：Multimedia messages more than RTP layers are further decoded, and preserved during conversation establishing in hash value
Multimedia messages verify, into step 6.
Step 6：Judge whether multimedia messages are consistent, if it is inconsistent, into step 7；If consistent, enter step
Rapid 8.
Step 7：According to the multimedia parameter transform coding form of session negotiation, into step 8.
Step 8：Because TMF is need not to change IP the and UDP information in raw data packets, so after being handled more than,
The packet is directly transmitted according to TMF routing table, into step 9.
Step 9：According to group service pattern, DC can both be used as both call sides, can also only be received with third party's identity
Session data, if the latter, then need to judge whether the data need forwarding portion to DC.Because TCF can be by session more
New information updates DC user plane information to TMF, if not having DC information in TMF hash value, completes this number
According to processing；If DC information, then it is the participant of the session to illustrate DC, it should into step 10.
Step 10：Judge whether the data come from DC by the source IP of packet and DC IP contrasts, if it is, explanation DC
It is that session is participated in caller or called identity, the data need not copy portion and issue DC, terminate this data processing；If no
It is, then into step 11.
Step 11：Judge whether the data are intended for DC by the purpose IP and DC of packet IP contrasts, if it is,
Because the data have been sent in step 8, so need not retransmit once；If it is not, illustrate the data neither coming from DC,
Nor issuing DC, DC participates in session, it is necessary to a data forwarding be copied to DC, into step 12 as third party's identity.
Step 12：The data copy is a, purpose IP and purpose udp port are changed respectively into DC IP and udp port,
According to routing forwarding to DC, terminate the whole handling process of the packet.
Step 13：Session is deleted, including：RTP session deletion request messages, message are sent to TMF according to operation flow TCF
In carry session id；After TMF receives RTP session deletion request messages, according to the session id in message, find above created
Hash list items are simultaneously deleted；TMF beams back session and deletes response message to TCF, and session is taken in message and deletes result success or failure.
For embodiment of the method, in order to be briefly described, therefore it is all expressed as to a series of combination of actions, but this area
Technical staff should know that the embodiment of the present invention is not limited by described sequence of movement, because implementing according to the present invention
Example, some steps can use other orders or carry out simultaneously.Secondly, those skilled in the art should also know, specification
Described in embodiment belong to preferred embodiment, necessary to the involved action not necessarily embodiment of the present invention.
The session method of Cluster Multimedia functive in broadband provided in an embodiment of the present invention, pass through self-defined T3 interfaces and meeting
Words management table carries out the session management between TMF and TCF and the data transfer between terminal and/or dispatching desk, wherein,
The conversation key of TMF session management table only creates a list item with the user plane IP and udp port of terminal called combination,
An other list item need not be created as conversation key using caller IP and udp port, therefore can not only save half table
Item management, and during data transfer, when caller changes, without modification list item, beneficial to user plane high speed forward.This
Session management table in inventive embodiments supports the session initiated by terminal and/or dispatching desk simultaneously, when carrying out list item management
Without doscrimination.This invention simplifies the conversation procedure between TCF and TMF, the forwarding for improving the transmission of company-data bag is imitated
Rate, ensure the transmission quality of company-data bag.
Figure 12 is a kind of structured flowchart for broadband Cluster Multimedia functive that the embodiment of the present invention proposes, such as Figure 12 institutes
Show, the broadband Cluster Multimedia functive specifically includes extraction module 301, enquiry module 302, acquisition module 303 and hair
Module 304 is sent, wherein：
Extraction module 301：When receiving RTP user face data bags, extract the RTP user face datas bag source IP,
Source udp port, purpose IP and purpose udp port；
Enquiry module 302：Using the source IP and source udp port as the first key value, by the purpose IP and purpose UDP
Port is looked into as the second key value, and according to first key value and second key value in current session management table
The conversation key of matching is looked for, the conversation key is the user plane IP and udp port that session corresponds to terminal called；
Acquisition module 303：Session corresponding with the conversation key found is obtained from the session management table
Value, it is session that the session management table, which includes the conversation key of each session and corresponding session value, the session value,
Corresponding multimedia parameter；
Sending module 304：Extract the multimedia messages in the RTP user face datas bag, if the multimedia messages with
The session value is consistent, then the RTP user face datas bag is forwarded according to the purpose IP and purpose udp port.
In another embodiment of the present invention, the sending module 304, be additionally operable to when the multimedia messages with it is described
When session value is inconsistent, the multimedia messages are encoded according to the coded format made an appointment, and according to the purpose
IP and purpose udp port forward to the RTP user face data bags after recompiling.
Wherein, the broadband Cluster Multimedia functive also includes the receiving module and list item establishment mould not shown in accompanying drawing
Block, wherein：Described receiving module, for before the extraction module receives RTP user face data bags, receiving collection team control
The RTP conversation establishing request messages that functive TCF processed is sent, wherein, the RTP conversation establishings request message includes session
ID, the user plane IP of terminal called and udp port, session multimedia parameter；Described list item creation module, it is described for extracting
User plane IP, udp port and the session multimedia parameter of terminal called, by the user plane IP and udp port of the terminal called
As conversation key, using the multimedia messages as corresponding to session value, create the meeting in the session management table
Talk about session entry corresponding to ID.
Accordingly, the sending module 304, it is additionally operable to send conversation establishing response message to the TCF, the session wound
Build in response message and carry the establishment result of session entry.
In embodiments of the present invention, the broadband Cluster Multimedia functive also includes the session updates not shown in accompanying drawing
Request module and renewal session entry module, wherein：Described session updates request module, in the transmission conversation establishing
Response message disappears to the RTP session updates request messages that TCF is sent, the RTP session updates request after the TCF, is received
Breath includes the session id, dispatching desk DC user plane IP and udp port；Described renewal session entry module, for carrying
Take the user plane IP and udp port of the DC, searched according to the session id in the session management table corresponding to conversational list
, the user plane IP and udp port of the DC are added in the session value of the session entry, to update session entry.Phase
Answer, the sending module 304, be additionally operable to send session updates response message to the TCF, the session updates response message
In carry the renewal result of session entry.
In embodiments of the present invention, the source that the broadband Cluster Multimedia functive is also included not shown in accompanying drawing compares mould
Block, purpose comparing module, wherein：Described source comparing module, for described according to the purpose IP and purpose udp port pair
After the RTP user face datas bag is forwarded, the source IP and DC user plane IP are compared；Described purpose compares mould
Block, for when the user plane IP of the source IP and the DC is inconsistent, comparing the purpose IP and the DC user plane IP；
Described is corresponding, sending module 304, is additionally operable to when the purpose IP and DC user plane IP is inconsistent, according to institute
DC user plane IP and udp port is stated, the RTP user face datas bag is transmitted to DC.
Further, the source comparing module, it is additionally operable to when the source IP is consistent with the user plane IP of the DC, or works as
When the purpose IP is consistent with the user plane IP of the DC, terminate this session data processing procedure.
In an alternate embodiment of the present invention where, the broadband Cluster Multimedia functive is also included not shown in accompanying drawing
Deletion request message receiving module and session entry removing module, wherein：Described deletion request message receiving module, is used for
When receiving the RTP session deletion request messages that the TCF is sent, extract the RTP sessions and remove what is carried in request message
Session id；Described session entry removing module, for according to the session id carried in the RTP sessions deletion request message,
Session entry corresponding to being searched in the session management table is simultaneously deleted.Accordingly, the sending module 304, is additionally operable to send
Session deletes response message to the TCF, the session and deletes the deletion result that session entry is carried in response message.
Cluster Multimedia functive in broadband provided in an embodiment of the present invention and its session method, by self-defined T3 interfaces and
Session management table carries out the session management between TMF and TCF and the data transfer between terminal and/or dispatching desk, wherein,
The conversation key of TMF session management table only creates a list item with the user plane IP and udp port of terminal called combination,
An other list item need not be created as conversation key using caller IP and udp port, therefore can not only save half table
Item management, and during data transfer, when caller changes, without modification list item, beneficial to user plane high speed forward.This
Session management table in inventive embodiments supports the session initiated by terminal and/or dispatching desk simultaneously, when carrying out list item management
Without doscrimination.This invention simplifies the conversation procedure between TCF and TMF, the forwarding for improving the transmission of company-data bag is imitated
Rate, ensure the transmission quality of company-data bag.
In the specification that this place provides, numerous specific details are set forth.It is to be appreciated, however, that the implementation of the present invention
Example can be put into practice in the case of these no details.In some instances, known method, structure is not been shown in detail
And technology, so as not to obscure the understanding of this description.
Similarly, it will be appreciated that in order to simplify the disclosure and help to understand one or more of each inventive aspect,
Above in the description to the exemplary embodiment of the present invention, each feature of the invention is grouped together into single implementation sometimes
In example, figure or descriptions thereof.However, the method for the disclosure should be construed to reflect following intention：I.e. required guarantor
The application claims of shield features more more than the feature being expressly recited in each claim.It is more precisely, such as following
Claims reflect as, inventive aspect is all features less than single embodiment disclosed above.Therefore,
Thus the claims for following embodiment are expressly incorporated in the embodiment, wherein each claim is in itself
Separate embodiments all as the present invention.
Those skilled in the art, which are appreciated that, to be carried out adaptively to the module in the terminal in embodiment
Change and they are arranged in one or more terminals different from the embodiment.Can be the module or list in embodiment
Member or component be combined into a module or unit or component, and can be divided into addition multiple submodule or subelement or
Sub-component.In addition at least some in such feature and/or process or unit exclude each other, it can use any
Combination is disclosed to all features disclosed in this specification (including adjoint claim, summary and accompanying drawing) and so to appoint
Where all processes or unit of method or terminal are combined.Unless expressly stated otherwise, this specification (including adjoint power
Profit requires, summary and accompanying drawing) disclosed in each feature can be by providing the alternative features of identical, equivalent or similar purpose come generation
Replace.
In addition, it will be appreciated by those of skill in the art that although some embodiments in this include institute in other embodiments
Including some features rather than further feature, but the combination of the feature of different embodiments means to be in the scope of the present invention
Within and form different embodiments.For example, in the following claims, embodiment claimed it is any it
One mode can use in any combination.
It should be noted that the present invention will be described rather than limits the invention for above-described embodiment, and ability
Field technique personnel can design alternative embodiment without departing from the scope of the appended claims.In the claims,
Any reference symbol between bracket should not be configured to limitations on claims.Word "comprising" does not exclude the presence of not
Element or step listed in the claims.Word "a" or "an" before element does not exclude the presence of multiple such
Element.The present invention can be by means of including the hardware of some different elements and being come by means of properly programmed computer real
It is existing.In if the unit claim of equipment for drying is listed, several in these devices can be by same hardware branch
To embody.The use of word first, second, and third does not indicate that any order.These words can be explained and run after fame
Claim.
Claims (10)
1. a kind of session method of broadband Cluster Multimedia functive, it is characterised in that methods described includes：
When receiving RTP user face data bags, the source IP of the RTP user face datas bag, source udp port, purpose IP are extracted
With purpose udp port；
It is using the source IP and source udp port as the first key value, the purpose IP and purpose udp port is crucial as second
It is worth, and searches the session key of matching in current session management table according to first key value and second key value
Word, the conversation key are the user plane IP and udp port that session corresponds to terminal called；
Session value corresponding with the conversation key found, the session management table are obtained from the session management table
Conversation key and corresponding session value including each session, the session value are multimedia parameter corresponding to session；
The multimedia messages in the RTP user face datas bag are extracted, if the multimedia messages are consistent with the session value,
The RTP user face datas bag is forwarded according to the purpose IP and purpose udp port.
2. according to the method for claim 1, it is characterised in that if the multimedia messages and the session value are inconsistent,
Methods described also includes：
The multimedia messages are encoded according to the coded format made an appointment, and according to the purpose IP and purpose UDP
Port forwards to the RTP user face data bags after recompiling.
3. according to the method for claim 1, it is characterised in that before RTP user face data bags are received, methods described
Also include：
The RTP conversation establishing request messages that clustered control functive TCF is sent are received, wherein, the RTP conversation establishings request disappears
Breath includes session id, the user plane IP of terminal called and udp port, session multimedia parameter；
The user plane IP, udp port and session multimedia parameter of the terminal called are extracted, by the user plane of the terminal called
IP and udp port as conversation key, using the multimedia messages as corresponding to session value, in the session management table
Create session entry corresponding to the session id；
Conversation establishing response message is sent to the TCF, the establishment of session entry is carried in the conversation establishing response message
As a result.
4. according to the method for claim 3, it is characterised in that in the transmission conversation establishing response message to the TCF
Afterwards, in addition to：
Receive TCF send RTP session updates request messages, the RTP session updates request message include the session id,
Dispatching desk DC user plane IP and udp port；
Extract the user plane IP and udp port of the DC, searched according to the session id in the session management table corresponding to
Session entry, the user plane IP and udp port of the DC are added in the session value of the session entry, to update conversational list
；
Session updates response message is sent to the TCF, the renewal of session entry is carried in the session updates response message
As a result.
5. according to the method for claim 4, it is characterised in that described according to the purpose IP and purpose udp port pair
After the RTP user face datas bag is forwarded, methods described also includes：
Compare the source IP and DC user plane IP；
If the source IP and the DC user plane IP are inconsistent, the purpose IP and the DC user plane IP are compared；
If the purpose IP and DC user plane IP is inconsistent, according to the user plane IP and udp port of the DC, by institute
State RTP user face data bags and be transmitted to DC.
6. according to the method for claim 5, it is characterised in that methods described also includes：
If the source IP is consistent with the user plane IP of the DC, or the purpose IP consistent with the user plane IP of the DC, then tie
This session data processing procedure of beam.
7. according to the method described in claim any one of 3-6, it is characterised in that methods described also includes：
When receiving the RTP session deletion request messages that the TCF is sent, the RTP sessions are extracted except being taken in request message
The session id of band；
According to the session id carried in the RTP sessions deletion request message, corresponding meeting is searched in the session management table
Words list item is simultaneously deleted；
Send session deletion response message to the TCF, the session and delete the deletion that session entry is carried in response message
As a result.
8. a kind of broadband Cluster Multimedia functive, it is characterised in that the broadband Cluster Multimedia functive includes：
Extraction module, for when receiving RTP user face data bags, extracting source IP, the source of the RTP user face datas bag
Udp port, purpose IP and purpose udp port；
Enquiry module, for using the source IP and source udp port as the first key value, by the purpose IP and purpose UDP ends
Mouth is used as the second key value, and is searched according to first key value and second key value in current session management table
The conversation key of matching, the conversation key are the user plane IP and udp port that session corresponds to terminal called；
Acquisition module, for obtaining session value corresponding with the conversation key found from the session management table,
The session management table includes the conversation key of each session and corresponding session value, and the session value is corresponding for session
Multimedia parameter；
Sending module, for extracting the multimedia messages in the RTP user face datas bag, if the multimedia messages with it is described
Session value is consistent, then the RTP user face datas bag is forwarded according to the purpose IP and purpose udp port.
9. Cluster Multimedia functive in broadband according to claim 8, it is characterised in that the sending module, be additionally operable to
When the multimedia messages and the session value are inconsistent, the multimedia messages are entered according to the coded format made an appointment
Row coding, and the RTP user face data bags after recompiling are forwarded according to the purpose IP and purpose udp port.
10. Cluster Multimedia functive in broadband according to claim 8, it is characterised in that the broadband Cluster Multimedia
Functive also includes receiving module and list item creation module：
Receiving module, for before the extraction module receives RTP user face data bags, receiving clustered control functive
The RTP conversation establishing request messages that TCF is sent, wherein, the RTP conversation establishings request message includes session id, is called eventually
User plane IP and udp port, the session multimedia parameter at end；
List item creation module, for extracting the user plane IP, udp port and session multimedia parameter of the terminal called, by institute
State terminal called user plane IP and udp port as conversation key, using the multimedia messages as corresponding to session value,
Session entry corresponding to the session id is created in the session management table；
The sending module, it is additionally operable to send conversation establishing response message to the TCF, is taken in the conversation establishing response message
Establishment result with session entry.
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