Method and system for lossless media stream transmission after switching between ordinary connection and secret connection |
|
IPC classes for russian patent Method and system for lossless media stream transmission after switching between ordinary connection and secret connection (RU 2430474):
  
 Home (e)node-b with new functionality / 2429590
Wireless communication device is configured as an home node-B (H(e)NB). The H(e)NB is configured to perform a locking function to control modification of carrier and user controlled parameters, and is also configured to detect a change in location.
 Method of detecting fraud during roaming connections in mobile communication networks / 2429589
During roaming connections, the roaming connection corresponding to the subscriber identification module (SIM) is checked for possible misuse using at least one criterion. According to the invention, the "busy rate" of the given SIM is checked as an essential criterion for a given period of time.
 Method, system and device for denying video call in favour of voice call / 2429588
Invention discloses a method, system and a network device for denying a video call in favour of a voice call. The network device stores the condition for denying a video call in favour of a voice call set by the calling or called user. The network device determines whether the current state of the calling or called user satisfies the condition for denial of video call in favour of voice call, and sends an instruction to the mobile services switching centre. The mobile services switching centre connects the calling and called users through a voice call if the calling or called user satisfies the condition for denial of video call in favour of voice call.
 Method, system and device for increasing multimedia messaging service system capacity / 2429587
Message distributing device determines a first multimedia messaging service center (MMSC) node for receiving a multimedia message, and forwarding the multimedia message to a relay of the first MMSC node, after having received the multimedia message; the multimedia message is transmitted to a server of the first MMSC node by the relay of the first MMSC node, and stored on the server of the first MMSC node. The server of the first MMSC node uniquely corresponds to the relay of the first MMSC node; the server of the first MMSC node sends the multimedia message to the receiving party via the relay of the first MMSC node and the message distributing device. A system and a device for increasing multimedia messaging service system capacity are also disclosed.
 Method, system and network element for processing service provision after network element data become unavailable, or upon network element denial / 2429576
System and network element for processing service provision after network element data become unavailable or upon network element denial. When a service providing network element receives a message with a request to provide services from the network and is initiated for the called party, and when user data are unavailable, the service providing network element returns a message on unavailability of data for the called party to the network. When the network element which contains user registration data is abnormal, and user registration data are unavailable, the time during which the service is unavailable is cut and user servicing can be quickly restored by using the present invention.
Method, system and network element for processing service provision after network element data become unavailable, or upon network element denial / 2429576
System and network element for processing service provision after network element data become unavailable or upon network element denial. When a service providing network element receives a message with a request to provide services from the network and is initiated for the called party, and when user data are unavailable, the service providing network element returns a message on unavailability of data for the called party to the network. When the network element which contains user registration data is abnormal, and user registration data are unavailable, the time during which the service is unavailable is cut and user servicing can be quickly restored by using the present invention.
 Wireless data exchange / 2429528
Information management system includes a first wireless communication device, a second wireless communication device and an application module. The first wireless communication device has an address directory which contains contact information. The second wireless communication device has an address directory and is configured to interface with the first wireless communication device over a wireless network. The application module detects a communication event between the first and the second device and, as response to detecting the communication event, it offers the user of the first device to send contact information to the second device. The application module also assigns the first device to send contact information over the wireless network to the second device. The address directory may be located on either a UICC card, SIM, USIM, Mega SIM or any other smart card or on an integrated chip in a mobile device or on a remote server.
 Method to transmit and receive system information / 2428819
In process of system information transfer by means of a basic station to at least one mobile terminal, the first unit is sent, which is related to system information along a broadcasting channel, configured with the possibility to carry out broadcasting transfer of system information only. The second unit is transferred, which is related to system information along a jointly used downlink channel configured to transfer system information and other data, after the first unit has been sent. Besides, the second unit contains planning information. Than the third unit is transferred, which is related to system information along a jointly used downlink channel in compliance with the planning information contained in the second unit, after the second unit has been sent.
 Method to increase throughput capacity in system, including link assignments / 2428818
Methods and devices are disclosed, which ensure conditional assignments of downlink resources to access terminals, which are assigned to other terminals. Additionally, the methods and devices are disclosed to process resources in order to determine whether the access terminal shall use resources that were conditionally assigned.
 Method, system and device to disconnect user during transfer of mobile terminal service in heterogenous network / 2428817
Method of user disconnection, when transfer of service takes place, or there is a transition between a 3GPP network and a non-3GPP network, includes the following stages: user equipment is transmitted or switched from the origin network into the target one. A request to delete a channel sent by a service gateway of the origin network is received with the help of the origin network mobility control object. A channel resource or resources are deleted with the help of the origin network mobility control. It is decided whether a user should be disconnected from the origin network, if all channel resources of the user are deleted. Using non-3GPP gateway of the origin network, a message that indicates cancellation of linking and was sent with the help of the data package gateway is received. Channel resources are deleted with the help of the origin network non-3GPP gateway. Using the non-3GPP gateway of the origins network, it is identified, whether a user should be disconnected from the origin network, if it is identified that the user channel resources have been deleted.
 Method and wireless system for monitoring technical parameters of industrial objects / 2430399
Wireless system for monitoring technical parameters of industrial objects, having a base radio station fitted with an electrical power supply, connected by a wireless channel to sensor modules, in the housing of which there is a power supply, a physical quantity sensor, a primary data transmitting device, the sensor modules are divided into groups and each group is wirelessly connected to the base radio station through routers, and the base radio station is connected by a wire channel to an automated workstation which comprises apparatus for mathematical processing of the obtained information and apparatus for displaying the information processing results, as well as devices for storing the obtained information, and each sensor module additionally contains a primary data processing device which is electrically connected to the physical quantity sensor and which is also electrically connected to a primary data transmitting device, and each of the routers has a second data processing device, where the routers can be wirelessly connected to each other.
 Stream navigation / 2429570
Stream is accessed; the location of the header of each message in the stream is determined; the styling of each message in the stream is modified at least partly based on the location of the header of each message; a visual image of the stream is formed; and a navigation control element is displayed on the screen for navigation between all messages in the stream within at least one of the message headers in the visually displayed stream.
 Wireless communication system, distribution method of pilot signals (versions) and pilot model (versions) / 2427958
Method is applied for distribution of pilot signals for transmission of multiple pilot flows through system of antenna with multiple inputs-outputs (MIMO) with the use of modulation which is known as multiplexing with orthogonal frequency division (OFDM). In the version of invention implementation the distribution of pilot signals is applicable to structure of adjacent scenes, and two pilot signals are arranged for each pilot flow in structure of scenes, which includes 8 subcarriers and 6 OFDM symbols. The above 8 pilot flows are grouped in two clusters of pilot flows, and pilot signals for each cluster of pilot flows are grouped in two pilot clusters. Four pilot clusters are arranged in structure of the first scene, and arrangement of pilot clusters in structure of the second scene corresponds to arrangement in structure of the first scene. As a result, high transmission speed is reached in such wireless communication system.
 Mobile terminal and method of loading content onto said terminal / 2427104
Invention discloses a mobile terminal and method of loading content onto said terminal. Content intended for loading is selected based on broadcast-associated data which are indicated by the user through a content delivery channel. The content delivery channel includes a broadcast signal delivery channel and a content loading channel, where the content delivery channel is different from the broadcast signal delivery channel. Channel volume division is performed for the content delivery channel by allocating part of the channel volume to the broadcast signal and the other part to content. The broadcast signal and content are delivered through the content delivery channel. Content is loaded from the broadcast network onto the mobile terminal based on selection through the content delivery channel.
 System and method of organising group presentations of content and group communication during said presentations / 2427090
Multiple users synchronously view a content element such as a film while interacting, for example, through an instant messaging system. A viewing event can be organised after users receive invitations, a reply to the invitations and receiving reminders for the viewing event. The viewing event enables to conduct a contest between users. Users can be provided with an account for paying for participating in the viewing event.
 Method to grant license to client device corresponding to coded content and system of conversion to manage digital rights, applying this method / 2421806
Method of a conversion system operation to manage digital rights to grant a license to a client's device corresponding to coded content consists in the following. The first content of the first type of digital rights content and the first license corresponding to the first content are converted to manage digital rights in order to generate the second content of the second type of digital rights content and the second license corresponding to the second content. A license request is received, corresponding to the second content distributed by means of superdistribution to a third party. The second license corresponding to the second content distributed by means of superdistribution is requested from a server corresponding to the second management of digital rights. The second license corresponding to the second content distributed by means of superdistribution is received and sent to a third party.
 Combining multiline protocol accesses / 2419986
Method to build combined events from protocol accesses, received by a system of data processing, comprises stages, at which multiple protocol accesses are received; for each received protocol access: it is identified that the protocol access includes ID (an identifier), common for a combined event, in compliance with the combination properties; if a protocol access is an initial protocol access of a potential combined event in compliance with the combination properties: a new combined event is started; and the protocol access is transformed into a new combined event in compliance with the transformation properties for a combined event; and if a protocol access is an ending protocol access of the existing combined event in compliance with the combination properties: the protocol access is transformed into the existing combined event in compliance with the transformation properties for the existing combined event, and the existing combined event is terminated.
 Systems and methods for channels switching / 2419245
CSF is developed with one or more units of network abstraction level (NAL) as a frame of a random access point (RAP), and adjacent frames are sent, which include CSF and a frame, which is not a RAP frame, besides, each of them has an identical identification number.
 System, method and device to develop templates that propose default settings for typical virtual channels / 2419216
User is offered a set of types of typical virtual channels based on a certain previously determined or to be determined category, for instance, a news channel, which contains previously determined default settings and a procedure of actions. Templates of typical virtual channels considerably simplify setting a virtual channel to a viewer. For instance, for a news channel a procedure of default actions consists in storing only the latest news, for series - a procedure of defaults actions is in storing everything until viewed.
 Method and device for processing dvb-h (digital video broadcasting - handheld) compliant transport stream / 2418367
Invention proposes a method for processing a transport stream (TS) received as an input TS in a processing device (SDR), the transport stream comprising a plurality of elementary streams (ES), each ES being a set of TS packets having the same Packet IDentifier (PID), at least one of these ES being time-sliced so as to be sent in bursts, timing information indicating within a burst the time to the beginning of the next burst, applying a filtering operation to the input TS so as to filter out from the input TS part or all of one or more time- sliced ES; modifying the bursts scheduling of the input transport stream so as to generate a DVB-H compliant output TS from the filtered input TS.
 Method for simultaneous transmission of amplitude-modulated signal / 2317644
In accordance to the invention, amplitude-modulated signal of simultaneous broadcasting radio-transmission, which incorporates digital transmission signal and analog transmission signal in one transmission channel, is characterized by the fact that one side band of carrier of signal of simultaneous broadcasting transmission is modulated by digital transmission signal, and another band is modulated by correcting signal, which ensures provision of analog transmission signal of waveform envelope for demodulation. Generator of amplitude-modulated signal is intended to be used for generation and transmission of aforementioned signals.
|
FIELD: information technology. SUBSTANCE: method for lossless transmission of a media stream after switching from an ordinary connection to an encrypted connection used in a system having a base station, a media gateway and a communication terminal, said method comprising the following steps: after a base station receives a message for switching from an ordinary connection to an encrypted connection from a communication terminal, a special media frame is inserted into the media stream which indicates that switching from an ordinary call to an encrypted call has been performed, and the media stream is sent to a media gateway; the media gateway determines whether to detect the special media frame or not according to media stream transmission modes at the input and the output or according to media stream transmission modes at the input and the output and media data encoding-decoding formats, and the media gateway allows the media stream to pass through from the input to the output regardless of whether the special media frame must or must not be detected. EFFECT: reliable transmission of encrypted information owing to lossless transmission of encrypted speech. 16 cl, 1 tbl, 3 dwg
The technical field This invention relates to a technology of transmitting the media stream without loss in the field of mobile communications, in particular to a method and system to transmit the media stream without loss after switching from conventional connection to an encrypted connection. Background of invention In communication systems, the construction cost and maintenance cost private network is very high, the construction period is very long, and the private network has no versatility. So now when building a private network, as a rule, is the mode of the overlay network, i.e. a special device which satisfies the private requirements, "superimposed" on a universal communication network, to perform the functions of a private network. For example, a private network, encrypted communication can be established on the basis of a communication network with multiple access, code division multiple access (Code Division Multiple Access, CDMA), CDMA network only provides the transmission of encrypted speech and does not perform its decoding. In the field of development of mobile communication systems, third generation (3G) network architecture mobile CDMA was divided into two parts: the radio access network and core network. As shown in figure 1, the switching center mobile (Mobile Switching Center, MSC) has developed with the separation of the two parts: emulation 101 switching center mobile (Mobile Switching Center Emulation MSCe) and the media gateway (Media Gateway, MGW) 103, so that the management and transportation were separated, and the technology of switching channels and multiplexing time division (Time Division Multiplex, TDM) was replaced by the technology of the network packet. This emulation MSCe 101 provides a connection management and mobility management, the media gateway 103 provides a function to control the transmission medium provides transmission resources and implements the function of the manipulation of the media stream. Emulation MSCe 101 exchanges stream 105 signaling with the base station 102, the media gateway 103 and the hub station 104 switching and exchange of media stream 106 is performed between the base station 102, the media gateway 103 and the hub station 104 switching. Emulation MSCe 101 and the media gateway 103 - two network element belonging to the core network and the media gateway 103 performs conversion between different formats of encoding-decoding different domains with packet switched (i.e. domains based on the Internet Protocol (Internet Protocol, IP)) or formats domain with packet switched domain and a circuit-switched (TDM domain). Such a transformation format of encoding-decoding is called with a remote transcoder (Remote Transcoder Operation, RTO), and during operation with the remote transcoder compression, encoding, and decoding the media stream Boo is no cause deterioration of the media stream. If the encoding-decoding both ends in the domain with packet-switched networks are the same, the format conversion coding-decoding is not required, what is called beschrankter transfer (Transcoder Free Operation (TrFO), and during operation TrFO compression, encoding, and decoding the media stream will not cause deterioration. An encrypted connection from a private terminal to another, i.e. end-to-end encrypted connection, referred to as an encrypted connection, respectively, through an unencrypted connection hereinafter referred to as a normal connection. The user can initiate a connection as a normal connection, and when the conversation starts, click on the private terminal button to switch from normal connections on an encrypted connection to switch with a common connection to an encrypted connection, and this process is called switching from a conventional connection to an encrypted connection. In the traditional domain switched all streams of media information carried in the domain switched without encoding or decoding, so there is no operation that will degrade the media streams. However, between different domains with the packet switching or 3G network with the organization of the hybrid network domain with packet switching and domain with commutate the th channel, if working with a remote transcoder buffer parameters is performed after the transition to the stage of encrypted connection, compression, encoding, and decoding the media stream will cause its deterioration, and thus the reliability of the transmission will be impaired. For example, if the transparent transmission without loss of encrypted voice information is implemented in a CDMA network, encrypting the voice information is not decrypted in order to achieve reliable transmission of encrypted messages. After private terminal switches from the normal connection on an encrypted connection, if necessary work with the remote transcoder buffer parameters, compression, encoding, and decoding the media stream will cause deterioration of the media stream, and thereby degrade the reliability of the transmission. From the foregoing it is clear that the existing technology of transmission of the media stream after switching from conventional connection to an encrypted connection has drawbacks, and has inconvenience and drawbacks in actual use, and therefore should be improved. The invention With respect to the aforementioned drawbacks, the purpose of this invention is to provide a method and system to transmit the media stream without loss after switching from conventional connection to an encrypted connection to transfer the media stream without p the casualty, if the normal connection was switched to an encrypted connection in the wireless communications system. To achieve this goal, the invention provides a method of transferring the media stream without loss after switching from conventional connection to an encrypted connection is used in a system that includes a base station, a media gateway and a communication terminal. This method includes the following steps: A. After the base station receives from the communication terminal message switch with a common connection to an encrypted connection to switch with a common connection to an encrypted connection, is inserted in the media stream special MediaCoder indicating that it has been switching from a conventional connection to an encrypted connection, and then the media stream is transmitted to the media gateway. C. Determining a media gateway, discover or no special mediacat, in accordance with the modes of transmission of the media stream at the inlet and outlet or in accordance with the modes of transmission of the media stream at the inlet and outlet and the encoding-decoding media data, and the transmission of the media gateway the media stream from input to output, regardless of the detected mediacat or he should not be detected. In addition, the stage includes the following step: if special mediacat detected by the media gateway, you is adaptation within each group of packages code buffer parameters to the code stream of pulse code modulation (PCM) with speed 64/56 kbit/s and then transfer the code stream PCM output. In addition, once on the stage And the base station receives the message switch with a common connection to an encrypted connection, at least one frame signal is a dual tone multi-frequency signaling (Double Tone Multi-Frequency, DTMF) is inserted in the transmitted media stream, and frame alarm DTMF made in the form of any frame event signaling DTMF. In addition, the stage includes the following steps: B1. If the media stream as input, and the output is passed to the mode switched on stage encrypted connection to the media gateway directly transmits the media stream from input to output without detection special MediaCoder. In addition, the stage includes the following steps: B2. If the media stream as input, and the output is transmitted in the packet switching formats and encoding-decoding media data are the same, at the stage of encrypted connection the media gateway sends the media stream directly from input to output without detection special MediaCoder. In addition, the stage includes the following steps: B3. If the media stream as input, and the output is transmitted in the packet switching formats and encoding-decoding media data in them are different, at the stage of the call, the media gateway detects special mediacat, and when special mediacat Baruun, first disables improve speech for the media stream, and if the format of the encoding-decoding one end of the connection is found the same as the format of the encoding-decoding of the communication terminal, and the format of the encoding-decoding other end of the connection is an audio format according to recommendation G.711 International telecommunication Union, then adapts the package code in the format of the encoding-decoding one end of the connection to the code stream PCM format G.711 in accordance with the agreed format encrypted communication. In addition, if in step B3, the media gateway finds that the format of the encoding-decoding other end of the connection is not a format G.711, converts the format of the encoding-decoding format G.711, and then performs an operation that is performed in step B3 in the case where the format of the encoding-decoding other end of the connection is the format G.711. In addition, the stage includes the following steps: B4. If one of the media stream at the inlet and the media stream at the output is transmitted in packet switching, and the other mode is switched, at the stage of the conversation, the media gateway detects special mediacat, and when special mediacat detected, first disables improve speech for the media stream; and if the format of the encoding-decoding one is about the end of the connection is found the same, the format of the encoding-decoding of the communication terminal, and the format of the encoding-decoding other end of the connection is the audio standard G.711, then adapts the package code in the format of the encoding-decoding one end of the connection to the code stream PCM format G.711 in accordance with the agreed format encrypted communication. In addition, if in step B4, the media gateway finds that the format of the encoding-decoding other end of the connection is not a format G.711, then it converts the format of the encoding-decoding format G.711, and then performs step, which is performed in step B4 in the case when the format of the encoding-decoding other end of the connection is the format G.711. In order to achieve the above objectives, the invention proposes a system to transmit the media stream lossless containing the communication terminal, base station and the media gateway, and the terminal is connected to the base station wirelessly and is used for transmission to the base station message switching from conventional connection to an encrypted connection to switch a normal connection to an encrypted connection; the base station is connected to the media gateway and configured so that upon receipt of a message switching with regular connections to cipher the TES connection to insert a special mediacat in the media stream and then send the media stream to the media gateway; the media gateway is configured to determine whether to detect or no special mediacat, in accordance with the modes of transmission of the media stream at the inlet and outlet or in accordance with the modes of transmission of the media stream at the inlet and outlet and the encoding-decoding media data and the media gateway transmits the media stream from the input to the output regardless of whether to find special mediacat or not. In addition, if special mediacat detected by the media gateway, the packets of the code of the adapted media stream to the code stream of pulse code modulation speed 64/56 kbit/s and then passed on to the output. In addition, after the base station receives a message switching from conventional connection to an encrypted connection, at least one frame dual tone multi-frequency signaling (DTMF) is inserted in the transmitted media stream, and frame alarm DTMF made in the form of any frame event signaling DTMF. In addition, if the media stream as input, and the output is passed to the mode switched on stage call, the media gateway does not detect special mediacat, and directly transmits the media stream from input to output. In addition, if the media stream as input, and the output is transmitted in a packet-switched format and the encoding-decoding media data are the same, at the stage of the conversation, the media gateway does not detect special mediacat, and directly transmits the media stream from input to output. In addition, if the media stream as input, and the output is transmitted in the packet switching formats and encoding-decoding media data in them are different, at the stage of the call, the media gateway detects special mediacat, and when special mediacat detected, first disables improve speech for the media stream, and if the format of the encoding-decoding one end of the connection is found the same as the format of the encoding-decoding of the communication terminal, and the format of the encoding-decoding other end of the connection is the audio standard G.711, then adapts the package code in the format of the encoding-decoding one end connection to the code stream PCM format G.711 in accordance with the agreed format encrypted communication; if the format of the encoding-decoding other end of the connection is found which is not a format G.711, then converts the format of the encoding-decoding format G.711, and then performs the adaptation. In addition, if one of the media stream at the inlet and the media stream at the output is transmitted in packet switching, and the other mode is switched, at the stage of talking about the media gateway is Uruguay special mediacat, and when the special mediacat detected, first disables improve speech for the media stream; and if the format of the encoding-decoding one end of the connection is found the same as the format of the encoding-decoding of the communication terminal, and the format of the encoding-decoding other end of the connection is an audio file format standard G.711, then adapts the package code in the format of the encoding-decoding one end of the connection to the code stream PCM format G.711 in accordance with the agreed format encrypted communication; if the format of the encoding-decoding other end of the connection is found which is not a format G.711, then converts the format of the encoding-decoding format G.711 and then performs the adaptation. Using the above-mentioned technical schemes of the present invention can be implemented not only transfer without loss encrypting speech on the existing switching station, but also other elements behind it stations switching in the transmission path are informed about the need for loss-free transmission, thus ensuring the normal encrypted communication, and additionally ensuring reliability of the transmission of encrypted information. Brief description of drawings 1 is a diagram illustrating communication between devices in the domain with the batch commutative modern CDMA network. 2 is a diagram illustrating the structure of the system, carrying the media stream without loss after switching from conventional connection to an encrypted connection in accordance with this invention. Figure 3 - block diagram of the method of performing the transmission of the media stream without loss after switching from conventional connection to an encrypted connection in accordance with this invention. The invention In order to clarify the objectives, technical scheme and advantages of the present invention, hereinafter described in detail with accompanying drawings and forms of embodiment of the invention. It should be clear that the form of the invention, described herein, are considered in all respects as illustrative of this invention but without limiting it. The basic idea of this invention is as follows: during the transmission of media streams, the media gateway sends the media stream, which does not require conversion of the encoding format-decode directly to the output, and for the media stream, which is needed to convert the format of the encoding-decoding, the media gateway tries to detect special mediacat in the media stream, and after special mediacat detected, determines whether to adapt, instead of encode and decode the voice signal. If baptazia needed the media stream is adapted to pulse-code modulation (PCM) 64/56 kbit/s and is then passed to the output; thus, the media stream will not deteriorate during the transfer. 2 is a diagram illustrating the structure of a system that transmits the media stream without loss after switching from conventional connection to an encrypted connection in accordance with this invention. This system preferably is a CDMA network, which contains at least the terminal 201 communication base station 202 and the media gateway 203, and: Terminal 201 communication, which are connected to the base station 202 wirelessly, is used for transmission to the base station 202 message switching from conventional connection to an encrypted connection to switch with a common connection to an encrypted connection. The base station 202 that is connected to the media gateway 203, configured so that upon receipt of a message switching from conventional connection to an encrypted connection to insert a special mediacat in the media stream and then send the media stream to the media gateway 203; preferably, special mediacat is used to indicate that switching from a conventional connection to an encrypted connection has been made, and may be one or more DTMF frames. The media gateway 203 is configured to set the th it should be detected or not special mediacat, in accordance with the modes of transmission of the media stream at the inlet and outlet, or in accordance with the modes of transmission of the media stream at the inlet and outlet and the encoding-decoding media data and the media gateway 203 transmits the media stream from input to output, regardless of whether detected or not special mediacat; in other words, if the special mediacat is not found, the media stream is directly transmitted to the next station 204 switching (as shown by the dashed line and the unit represented by the dashed line, figure 2), and if special mediacat is found, the media stream is transmitted to the neighboring patch station after adaptation to PCM 64/56 kbit/s according to the encoding-decoding both ends of the connection. As the difference between the modes of transmission of the media stream at the input and output or encoding-decoding data buffer parameters directly affect whether or not caused deterioration of the transmission of the media stream, the present invention determines whether to detect special mediacat inserted into the media stream, in accordance with the difference between the modes of transmission of the media stream at the input and output or encoding-decoding data buffer parameters. Modes of transmission media include transfer mode MediaInfo the emission in the domain with packet switched (i.e. a domain IP) and the transmission mode of media information in the domain to the circuit switched (i.e. in the domain TDM), and determining, detecting, or no special mediacat, in the media gateway 203 includes, in particular, the following four situations: 1) If the media gateway 203 is under common connection and the media stream as input, and the output is passed to the mode switched, then no processing is performed after the media stream is transferred to the stage of encrypted connection, the media gateway 203 should not find any special mediacat, and information of the media stream is skipped before and after switching from conventional connection to an encrypted connection. 2) If the media gateway 203 is under common connection and the media stream as input, and the output is transmitted in packet switching, and the encoding-decoding both ends are the same, i.e. the input and output both work with the connection without the transcoder (Transcoder Free Operation (TrFO) in the domain with packet switching, a transformation format of encoding-decoding is not required, no processing is performed after the transition to the stage of encrypted connection, the media gateway 203 should not find any special mediacat, and information of the media stream is skipped before and after switching from normal connections on an encrypted connection. 3) If the media gateway 203 is under common connection and the media stream as input, and in the course transferred in the packet switching, formats and encoding-decoding both ends are different, that is, the input and output both work with the connection with the RTO (Remote Transcoder Operation) domain with packet switching, the media gateway 203 is required to detect special mediacat, and after going encrypted connection when special mediacat detected by the media gateway 203 disables the function of improving speech for the media stream, and is only adapted to PCM 64/56 kbit/s, without processing, encoding and decoding, to ensure packet transmission code without losses. 4) If the media gateway 203 is at the stage of a common connection, and, as regards the modes of transmission of the media stream, the mode input is the mode of transmission of media information in a domain with packet-switched, and mode on the output mode is the transmission of media information in a domain circuit-switched or mode input mode is transmission of media information in a domain circuit-switched, and mode on the output mode is the transmission of media information in a domain with packet switching, then the media gateway 203 is required to detect special mediacat, and after going encrypted connection when special mediacat detected by the media gateway 203, the function improvement of speech for the media stream is turned off and is only adaptation/selection of PCM 64/56 kbit/s, without treatment the encoding and decoding, to ensure packet transmission code without losses. Figure 3 - block diagram of the method of performing the transmission of the media stream without loss after switching from conventional connection to an encrypted connection in accordance with this invention; the method is used in the system shown in figure 2, containing the base station 202, the media gateway 203 and the terminal 201 of communication, and, in particular, the method comprises the following steps: Spider S301 demonstration: When the base station 202 receives from the terminal 201 communication message switching from conventional connection to an encrypted connection to switch with a common connection to an encrypted connection, the base station 202 inserts a special mediacat in the media stream and sends the media stream to the media gateway 203. In the above embodiment of the invention, when the base station 202 receives a message switching from conventional connection to an encrypted connection from terminal 201 communication, the base station 202 inserts one or more frames DTMF (dual tone multi-frequency signaling) in the transmitted media stream; a DTMF frame can be any frame DTMF events, shown in table 1.
Table 1 presents the frequencies corresponding frames dual tone multi-frequency signaling in this invention, the first row represents a high-frequency frame is in DTMF, the first column is the low frequency and the other frames DTMF events, including all 16 DTMF frames, which are 0~9, *, #, A~D. Alarm DTMF was gradually applied throughout the world in telephone apparatus with tonal button set, and as DTMF provides higher speed dialing, DTMF quickly replaced alarm system with pulse dialing, used in traditional phones with rotary dialer. In recent years, the DTMF signaling has also been applied in interactive management, such as menu language, voice mail, Telephone Bank, terminals, ATMs (Automatic Teller Machine (ATM), etc. Generation and detection of DTMF signaling through software is a valuable technical application. During encoding and decoding codec converts DTMF key presses or digital information in a two-tone signals and sends them, and during decoding detects keystrokes or digital information in the received DTMF signals. Each key on the telephone keypad is uniquely defined by the frequency of the string and the frequency of the column shown in table 1. The encoding and decoding DTMF does not require a large amount of computation, and can be easily implemented in computation speed of the modern computer. At the current step, after the terminal 201 connection is shall set the normal connection, when the user clicks a button to switch from normal connections on an encrypted connection, the terminal 201 communication sends a message to switch from conventional connection to an encrypted connection to the base station 202; when the base station 202 receives a message switching from conventional connection to an encrypted connection is sent from the terminal 201 communication, the base station 202 inserts one frame DTMF in the transmitted media stream. Insert DTMF frame in the media stream is implemented by the control center, the base station 202. For example, the control center, the base station inserts a DTMF frame duration of 20 MS in the media stream; as the terminal 201 communication usually has buttons 0~9, *, #but has no buttons, A~D, in order to avoid the situation, when the user unintentionally incorrectly dials the number of the key and initiate the transmission without loss encrypting speech, for initiating transmission of encrypted speech without losses, it is preferable to set the frames DTMF A~D, for example the frame DTMF C. W302: the media gateway 203 decide to discover or no special mediacat, in accordance with the modes of transmission of the media stream at the inlet and outlet or in accordance with the modes of transmission of the media stream at the inlet and outlet and formats encode-decode the media stream, and regardless of whether it is necessary or not to detect special mediacat,the media gateway 203 transmits the media stream from input to output. If the modes of transmission of the media stream at the inlet and outlet are both the mode of transmission of media information in the domain-switched channels, or input and output media streams are both compounds TrFO domain with packet switching, the media gateway 203 should not find any special mediacat, and he immediately skips the entire media stream; if the input and output both represent the connection with the RTO domain with packet switching, the media gateway 203 performs only adaptation PCM 64/56 kbit/s and does not perform the encoding and decoding to ensure packet transmission code without losses. In the above first embodiment of the present invention, if the media streams at the input and output are both in domain mode switched on stage encrypted connection to the media gateway 203 does not detect special mediacat and transmits the media stream directly from input to output. In the second embodiment of the present invention, if the input and output of the media stream are both in domain mode with packet switching, and the encoding-decoding media data at the input and output are the same, i.e. they represent the TrFO connection domain with packet switching, at the stage of encrypted connection the media gateway 203 does not detect special mediacat and transport the AET, the media stream directly from input to output. In the third embodiment of the present invention, the media streams at the input and output are both in domain mode with packet switching, and the encoding-decoding media data at the input and output are different, that is both at the entrance and at the exit there is a connection with the RTO domain with packet switching. The type of encoding-decoding one end of the connection RTO is the same as the type of encoding-decoding terminal 201 communication, designated as CODEC1; the type of encoding-decoding other end of the connection RTO, identified as CODEC2, consistent with the neighboring station 204 switching. At the stage of talking to the media gateway 203 to detect special mediacat, and when special mediacat detected by the media gateway 203, the function of improving speech for the media stream, such as noise reduction, echo compensation, compensation of losses of personnel and so on, is turned off; if the format of the encoding-decoding connection RTO found as converted from CODEC1 in CODEC2 and CODEC2 is a standard G.711 audio format, the conversion of the encoding format-decoding of CODEC1 in G.711 as the connection is no longer running, and packages code CODEC1 adapted to the code stream PCM 64/56 kbps format G.711 in accordance with the agreed format encrypted communication, to prevent deterioration of the encrypted code packages due to format conversion coding-decoding; if CODEC2 is not a format G.711, then you just need to convert the format of the encoding-decoding CODEC2 format G.711 and then execute the above processing. The media gateway 203 transmits the media stream to the output, such as a neighboring station 204 switching through the domain with packet switching. In the reverse direction, the media gateway 203 extracts the package code in the format CODEC1 from the code stream G.711 64/56 kbps received from a neighboring station 204 switching, and then sends packets of code to the base station 202. In the fourth embodiment of the present invention one of the media streams at the input and output is in domain mode with packet switching, and the other is in domain mode-switched channels, the type of encoding-decoding one end of the connection RTO is the same as the type of encoding-decoding terminal 201 communication, designated as CODEC1; the other end is a TDM equipment and the type of encoding-decoding - G.711. At the stage of talking to the media gateway 203 to detect special mediacat, and when special mediacat detected by the media gateway 203, special mediacat converted in tone DTMF format G.711 and function improvement of speech for the media stream, such as noise reduction, echo compensation, compensation of losses of personnel and so on, is turned off. If it is found that the encoding format-decode the simulation connection RTO converted from CODEC1 in G.711, the format conversion coding-decoding of CODEC1 in G.711 as the connection is no longer running, and packages code CODEC1 adapted to the code stream PCM 64/56 kbps format G.711 in accordance with the agreed format encrypted communication, to prevent deterioration of encrypted packets of code for format conversions coding-decoding. If CODEC2 is not a format G.711, then you just need to convert the format of the encoding-decoding CODEC2 format G.711 and then execute the above processing. The media gateway 203 transmits the media stream to the output, such as a neighboring station 204 switching, by multiplexing time division (TDM). In the reverse direction, the media gateway 203 extracts the package code in the format CODEC1 of 64/56 kbit/s G.711 encoded stream received from a neighboring station 204 switching, and then sends packets of code to the base station 202. After receiving the media stream adjacent station 204 switching determines it is necessary or not detection of special MediaCoder. If discovery is necessary and special mediacat With DTMF is detected, the function of improving speech for the media stream, such as noise reduction, echo compensation, compensation of losses of personnel and so on, is turned off and performs other processing according to the types of encoding-decoding both ends is soedineniya. If the type of encoding-decoding one end is CODEC1, it performs the same operation as in the media gateway 203, otherwise the format of the transfer station switching is automatically converted into a format G.711 and receive the media stream is transmitted to output a fully transparent manner without loss. Such processing is performed on the entire route of the connection, in order to guarantee the transmission without loss of encrypted packets code terminal 201 communication gateway switching station, which handles the encryption (called for brevity encryption gateway station switching) on the other end of the connection, and encrypts the gateway switching station performs the processing from a common connection to a secure connection, and thus ensures a normal conversation. Summarizing, in this invention, when a normal connection is switched to an encrypted connection, the base station inserts a special mediacat in the media stream and sends it to the media gateway, the media gateway decides whether to detect or no special mediacat in accordance with the modes of transmission of the media stream at the inlet and outlet of the media or formats encoding-decoding media data of the media stream, and regardless of whether or not to find special mediacat, the media gateway transmits the media stream from the input to the output if the special mediacat detected by the media gateway, is adapting to the PCM 64/56 kbit/s, without processing, encoding and decoding, in order to ensure transparent and lossless transmission of encrypted packets code terminal 201 links on the route of the connection. With this technical scheme can be implemented not only transfer without loss encrypting speech on the current switching station, but, in addition, other elements of the network switching stations located further along the transmission path, it is reported that this requires the transmission of lossless, which ensures the reliability of the transmission of encrypted information. Of course, this invention may have many other embodiments, and within the framework of this invention, a specialist in the art can make various corresponding changes and transformations that are in the scope of the attached claims. Industrial applicability This invention can be applied in a system that includes a base station, a media gateway and a communication terminal to transmit the media stream without loss after the user of the wireless terminal is switched from a normal connection on an encrypted connection, to guarantee secure transmission of encrypted information and to provide additional funds to improve the quality of service user the wireless terminal. 1. The mode of transmission of the media stream without loss after switching from conventional connection to an encrypted connection is used in a system containing a base station, a media gateway and a communication terminal, and this method includes the following steps: 2. The method according to claim 1, wherein, if the special mediacat detected by the media gateway, the stage further includes adapting code packages the media stream to the code stream of pulse code modulation (PCM) with speed 64/56 kbit/s and then transfer the code stream PCM output. 3. The method according to claim 1, additionally kiuchumi: 4. The method according to claim 1, wherein the stage further includes the following step: 5. The method according to claim 1, wherein the stage further includes the following step: 6. The method according to claim 2, in which the stage further includes the following step: 7. The method according to claim 6, further including: 8. The method according to claim 2, in which the stage further includes: 9. The method of claim 8, further including: 10. The system for implementing the method according to any one of claims 1 to 9, containing: 11. The system of claim 10, in which, when a special mediacat detected by the media gateway, the packet code adapted media stream to the code stream of pulse code modulation (PCM) with speed 64/56 kbit/s and then passed on to the output. 12. The system of claim 10, in which, after the base station receives a message switching from conventional connection to an encrypted connection, the transmitted media stream is inserted at least one frame dual tone multi-frequency signaling (DTMF), and frame alarm DTMF is any frame event signaling DTMF. 13. The system of claim 10, in which, if the media stream as input, and the output is passed to the mode switched on stage call, the media gateway does not detect special mediacat, and directly transmits the media stream from input to output. 14. The system of claim 10, in which, if the media stream as input is, and the output is transmitted in packet switching, and the encoding-decoding media data are the same, then at the stage of the call, the media gateway does not detect special mediacat, and directly transmits the media stream from input to output. 15. The system according to claim 11, in which, if the media stream as input, and the output is transmitted in packet switching, and the encoding-decoding media data in them are different, at the stage of the call, the media gateway detects special mediacat, and when special mediacat detected, first disables improve speech for the media stream; and if it is determined that the format of the encoding-decoding one end of the connection is the same as the format of the encoding-decoding of the communication terminal, and the format of the encoding-decoding other end of the connection is the audio standard G.711, then adapts the packet code the format of the encoding-decoding one end of the connection to the code stream PCM format G.711 in accordance with the agreed format encrypted communication; and if the format of the encoding-decoding other end of the connection is not a format G.711, then converts the format of the encoding-decoding format G.711, and then performs the adaptation. 16. The system according to claim 11, in which, if one of the media is Otok at the entrance and the media stream at the output is transmitted in packet switching, and the other mode is switched, at the stage of the conversation, the media gateway detects special mediacat, and when special mediacat detected, first disables improve speech for the media stream; and if it is determined that the format of the encoding-decoding one end of the connection is the same as the format of the encoding-decoding of the communication terminal, and the format of the encoding-decoding other end of the connection is the audio standard G.711, then adapts the package code in the format of the encoding-decoding one end of the connection to the code stream PCM format G.711 in accordance with the agreed format encrypted communication; if the format encoding-decoding other end of the connection is not a format G.711, then converts the format of the encoding-decoding format G.711 and then performs the adaptation.
|
