CN104994546B - Method, mobile terminal based on CDMA transparent transmission voice channel transmitting grouped data - Google Patents
Method, mobile terminal based on CDMA transparent transmission voice channel transmitting grouped data Download PDFInfo
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- CN104994546B CN104994546B CN201510122401.9A CN201510122401A CN104994546B CN 104994546 B CN104994546 B CN 104994546B CN 201510122401 A CN201510122401 A CN 201510122401A CN 104994546 B CN104994546 B CN 104994546B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
Abstract
The invention discloses a kind of methods based on CDMA transparent transmission voice channel transmitting grouped data, and transparent transmission service is established between communicating pair；The packet data for being selected user by mobile terminal is grouped processing by frame as data source, and to packet data；Further, it transmits treated 8.55kbps packet data, and the data of treated 8.55kbps is subjected to the data that rate adaptation is 64kbps in base station；Opposite end base station is transmitted transparently in core net；Data are reverted to the data of 8.55kbps by base station again, and send packet data to callee by transparent transmission channel；Receiving end restores initial data.The present invention can not increase any hardware cost, by the way of software, between any two mobile terminal in CDMA mobile communcations system or between mobile terminal and server, guarantee reliability, real-time and the safety of data transmission, to meet the use demand of user, enhance communication efficiency and user experience.The invention also discloses a kind of mobile terminals.
Description
Technical field
The present invention relates to fields of communication technology, more particularly to the side based on CDMA transparent transmission voice channel transmitting grouped data
Method, mobile terminal.
Background technique
Currently, the remote safety one transmitted and transmitted of data continuously transmits number to being focus concerned by people
According to mode have very much, but by public wireless network provide voice channel realize data continuous communication in the way of there has been no
The method that maturation solves.
In the second generation or 3 G mobile communication network, by voice channel transmission of speech signals, pass through data channel
Transferring non-speech data, the two is independent mutually, usually the non-speech data transmitted by voice channel, referred to as with interior data
(IBD:In Band Data).In the methods of the invention, with various other data letter that interior data include in addition to voice data
Breath, such as image data, video and control signaling packet data.
With the rapid development of science and technology, wireless communication networks area coverages is growing, and provides for people
Communication data transmission reliability and real-time while, safety also increasingly causes to pay close attention to, it is ensured that data in time, effectively,
It correctly transmits significant.
In conventional wireless communication network, circuit domain transmitting voice information, packet domain transmission packet information.Packet domain is used and is deposited
Pass-through mode transmitting grouped data is stored up, there are Forwarding Delays；In view of expense (such as source, destination address of each packet payload
Information) so that the information content of transmission increases by 5% or more；Furthermore grouping transmission be likely to occur it is out-of-sequence, lose the problems such as sequence.And circuit
Domain uses connection-oriented communication mode, guarantees that communicating pair link is dedicated, data are through, and time delay is small；Communicating pair physics chain
After road is established, always exists, can communicate at any time, ensure that real-time；Communicating pair is sent according to transmission sequence, no out-of-sequence to ask
Topic.
At the same time, in wireless communications, the safety of data and privacy are vital, core for a user
Heart net is divided into packet domain core network and circuit domain core net, and packet domain core network is connect with internet, vulnerable to network layer attacks, makes
It must be faced based on the user side and server side packet data that wireless communication system packet domain transmits and the safety such as eavesdrop, distort
Hidden danger；And circuit domain core net is not connect with internet, attacker is difficult to initiate network layer attacks to circuit domain core net, therefore
Information based on the transmission of wireless communication system circuit domain has more safety and privacy compared with the information transmitted by packet domain.
Summary of the invention
In view of the above problems, a kind of based on CDMA transparent transmission voice letter the technical problem to be solved by the present invention is to how to provide
The method of road transmitting grouped data, mobile terminal can not increase any hardware cost, by the way of software, in CDMA
Between any two mobile terminal in mobile communcations system or between mobile terminal and server, guarantee the reliable of data transmission
Property, real-time and safety, to meet the critical issue of the use demand of user.
For this purpose, the invention proposes a kind of methods based on CDMA transparent transmission voice channel transmitting grouped data, including
Specific following steps:
S1: communicating pair establishes transparent transmission service between the communicating pair by triggering voice transparent transmission business module；
S2: trigger module is selected by mobile terminal data, the packet data that user is selected passes through as data source
Data conversion module is grouped processing by frame to the packet data；
S3: by data transmission trigger module, treated 8.55kbps packet data is transmitted, and by treated
The data of 8.55kbps carry out the data that rate adaptation is 64kbps in base station；
S4: opposite end base station is transmitted transparently in core net；
S5: data are reverted to the data of 8.55kbps by the base station again, and send the grouping by transparent transmission channel
Data are to callee；
S6: receiving end restores initial data by data conversion module.
Further, the step S1 is specifically included:
S11: caller calls called party number, after callee answers, into talking state；
S12: when the calling party and/or callee need to carry out transparent transmission service communication, the communicating pair passes through
After triggering the sending service switching order of mobile terminal sound transparent transmission service trigger module and order sending, the communication
Twocouese base station controller initiating business request；
S13: the base station controller sends service connection to terminal and establishes response message；
S14: the terminal sends service connection to the base station controller and completes, and transparent transmission channel is established, and by voice industry
Business is converted into data service.
Further, further includes: after establishing the transparent transmission channel, the base station controller stop vocoder to data packet into
Row coding and/or decoding process, the data packet received is handled according to the data packet in data service.
For this purpose, the invention also provides a kind of mobile terminals, comprising:
Voice transparent transmission business trigger module is sent out for the calling subscriber and/or called subscriber to the base station controller
The request of sending voice transparent transmission service, after the base station controller receives transparent transmission service request message, starts the transparent transmission service pair
The voice data received executes ISLP adaptation processing；
Data select trigger module, select data to be transmitted for user；
Data conversion module, for the data received to be converted to the data of preset encoding and decoding format；
Data transmission trigger module transmits packet data by voice transparent transmission channel for user, wherein the data pass
After sending trigger module to start, transparent transmission channel is sent to after target data is encoded using preset encoding and decoding format；
State display module, for showing mobile terminal current state on interface.
The invention discloses a kind of method based on CDMA transparent transmission voice channel transmitting grouped data, communicating pair passes through touching
Voice transparent transmission business module is sent out, establishes transparent transmission service between communicating pair and local terminal base station；It is selected by mobile terminal data
Trigger module, the packet data that user is selected are carried out packet data by frame as data source, and by data conversion module
Packet transaction；By data transmission trigger module, treated 8.55kbps packet data is transmitted, and by treated
The data of 8.55kbps carry out the data that rate adaptation is 64kbps in base station；Opposite end base station is transmitted transparently in core net；
Data are reverted to the data of 8.55kbps by base station again, and send packet data to callee by transparent transmission channel: receiving end
Initial data is restored by data conversion module.The present invention can not increase any hardware cost, by the way of software,
Between any two mobile terminal in CDMA mobile communcations system or between mobile terminal and server, guarantee data transmission
Reliability, real-time and safety enhance communication efficiency and user experience to meet the use demand of user.The present invention
Also disclose a kind of mobile terminal.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects of the present invention, feature and advantage can
It is clearer and more comprehensible, the followings are specific embodiments of the present invention.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, identical component is indicated with identical pa-rameter symbols.In the accompanying drawings:
Fig. 1 diagrammatically illustrates according to an embodiment of the present invention a kind of based on CDMA transparent transmission voice channel transmitting grouped data
Method step flow chart；
Fig. 2 diagrammatically illustrates a kind of structural schematic diagram of mobile terminal according to an embodiment of the present invention；
Fig. 3 diagrammatically illustrates according to an embodiment of the present invention a kind of based on CDMA transparent transmission voice channel transmitting grouped data
Transparent transmission structural schematic diagram；
Fig. 4 diagrammatically illustrates according to an embodiment of the present invention a kind of based on CDMA transparent transmission voice channel transmitting grouped data
Device in call setup flow chart；
Fig. 5 diagrammatically illustrates according to an embodiment of the present invention a kind of based on CDMA transparent transmission voice channel transmitting grouped data
Device in multi-medium data transmission flow figure；
Fig. 6 diagrammatically illustrates according to an embodiment of the present invention a kind of based on CDMA transparent transmission voice channel transmitting grouped data
Device in user actively discharge transparent transmission service flow chart.
Specific embodiment
The invention discloses a kind of method and apparatus based on CDMA transparent transmission voice channel transmitting grouped data, a kind of possibility
Scheme is adapted to association including the use of the ISLP (Intersystem Link Protocol, InterSystem Link Protocol) in IS728 agreement
View, realizes transparent transmission service, and the present invention illustrates the establishment process of transparent transmission service by taking IS728 agreement as an example and by transparent transmission transmission
The mode of data.After realizing transparent transmission service in CDMA mobile communcations system, communicating pair establishes transparent transmission channel, transmits data branch
Bandwidth of air-interface 8.55Kbps is held, calling party selects packet data to be sent, and through base station sub-system, calling terminal is sent
8.55k data packet is adapted to 64K using ISLP technology, generates ISLP frame, the above-mentioned ISLP frame of core net transparent transmission, not to data
Any processing is done, the base station sub-system of the other side, which identifies ISLP frame and extracts data, is sent to called terminal or service
Device is assembled automatically using data processing module in called terminal or server, is generated target and is corresponded to packet data file.Further
Ground establishes common voice communication between communicating pair first, is needing to carry out data based in above-mentioned business procession
It when transparent transmission, is operated by two parties, triggers the initiation of transparent transmission service；After service negotiation success, that is, transparent transmission language can be used
Message road.If service negotiation failure or user actively abandon transmitting, mobile terminal is directly entered idle standby mode, cannot
Continue normal speech business；After transparent transmission service is negotiated successfully, calling subscriber selects point to be transmitted by terminal operation
Group data, into transfer mode, after starting data transmission, transparent transmission channel is occupied, and double hairs cannot carry out voice communication again, passes
After sending, this voice transparent transmission business is discharged, communicating pair returns to idle state.
Below in conjunction with attached drawing, embodiments of the present invention is described in detail.
CDMA transparent transmission voice channel transmitting grouped data is based on using one kind proposed by the present invention in order to better understand
Method and apparatus, be described in detail with following attached drawing example.
As shown in Figure 1, the present invention provides a kind of methods based on CDMA transparent transmission voice channel transmitting grouped data, including
Specific following steps:
Step S1: communicating pair establishes transparent transmission service by triggering voice transparent transmission business module between communicating pair.
Specifically, step S1 is specifically included:
Step S11: caller calls called party number, after callee answers, into talking state.
Step S12: when calling party and/or callee need to carry out transparent transmission service communication, communicating pair passes through triggering movement
Terminal speech transparent transmission service trigger module issue service switching order, and order issue after, communicating pair either synchronously or asynchronously to
Base station controller initiating business request.
Step S13: base station controller sends service connection to terminal and establishes response message.
Step S14: terminal sends service connection to base station controller and completes, and transparent transmission channel is established, and voice service is turned
Turn to data service.
Further, a kind of method based on CDMA transparent transmission voice channel transmitting grouped data proposed by the present invention, also
It include: after establishing transparent transmission channel, base station controller stops vocoder and carries out coding and/or decoding process to data packet, will receive
Data packet handled according to the data packet in data service.
Step S2: by mobile terminal data select trigger module, the packet data that user is selected as data source, and
By data conversion module, processing is grouped by frame to packet data.
Step S3: by data transmission trigger module, treated 8.55kbps packet data is transmitted, and will be after processing
8.55kbps data base station carry out rate adaptation be 64kbps data.
Step S4: opposite end base station is transmitted transparently in core net.
Step S5: data are reverted to the data of 8.55kbps by base station again, and send packet data by transparent transmission channel
To callee.
Step S6: receiving end restores initial data by data conversion module.
The invention discloses a kind of method based on CDMA transparent transmission voice channel transmitting grouped data, communicating pair passes through touching
Voice transparent transmission business module is sent out, establishes transparent transmission service between communicating pair and local terminal base station；It is selected by mobile terminal data
Trigger module, the packet data that user is selected are carried out packet data by frame as data source, and by data conversion module
Packet transaction；By data transmission trigger module, treated 8.55kbps packet data is transmitted, and by treated
The data of 8.55kbps carry out the data that rate adaptation is 64kbps in base station；Opposite end base station is transmitted transparently in core net；
Data are reverted to the data of 8.55kbps by base station again, and send packet data to callee by transparent transmission channel；Receiving end
Initial data is restored by data conversion module.The present invention can not increase any hardware cost, by the way of software,
Between any two mobile terminal in CDMA mobile communcations system or between mobile terminal and server, guarantee data transmission
Reliability, real-time and safety enhance communication efficiency and user experience to meet the use demand of user.
A kind of method based on CDMA transparent transmission voice channel transmitting grouped data proposed by the present invention mainly utilizes CDMA to move
The voice transparent transmission business that dynamic communication network provides, the business provide a kind of transparent transmission of voice data, i.e. voice for user
The encoding and decoding of data carry out on mobile terminals, and the specific system equipment being related to includes: base station sub-system (BSS), base station control
Device BSC (Base Station Controller, base station controller) processed and mobile switching centre (MSC) do not do any voice coder
Decoded processing to utilize the transparent transmission voice traffic channel transmitting grouped data.
Further, as shown in Fig. 2, the present invention also provides a kind of mobile terminals 10, comprising: the triggering of voice transparent transmission business
Module 101, data selection trigger module 102, data conversion module 103, data transmission trigger module 104 and status display mould
Block 105.
Specifically, voice transparent transmission business trigger module 101 sends voice transparent transmission industry to base station controller for calling subscriber
Business request, after base station controller receives transparent transmission service request message, starting transparent transmission service executes the voice data received
ISLP (Intersystem Link Protocol, InterSystem Link Protocol) adaptation processing；Data select trigger module 102 to use
Data to be transmitted are selected in user；Data conversion module 103 is used to the data received being converted to preset encoding and decoding format
Data；Data transmission trigger module 104 transmits packet data by voice transparent transmission channel for user, wherein data transmission touching
After sending out module starting, transparent transmission channel is sent to after target data is encoded using preset encoding and decoding format；State display module 105
For showing mobile terminal current state on interface.
CDMA transparent transmission voice channel transmitting grouped data is based on using one kind proposed by the present invention in order to better understand
Method and apparatus, the present invention carries out following example, and protection scope of the present invention not only limits to following example.
Specifically, the voice transparent transmission business that the present invention utilizes existing cdma system to provide, in base station sub-system side bypass sound
Code device realizes the transparent transmission of data, and mobile terminal transmits packet data by transparent transmission voice channel, when transparent transmission service is created as
After function, which can be regarded as a fixation route for packet data exchanged, the communicating pair for establishing connection can be with
Data transmission is carried out, under conditions of permanent, this route exists always, and occupies the channel always, believes based on voice
The stability of road transmission, the real-time of block data communication are preferable.
Further, using the structural representation of the method for CDMA transparent transmission voice channel transmitting grouped data, as shown in figure 3,
Specifically: communicating pair establishes transparent transmission service by triggering voice transparent transmission business module between communicating pair, wherein communication is double
Side is mobile terminal, selects trigger module using mobile terminal data, the packet data that user is selected is as data source, then leads to
It crosses data conversion module and processing is grouped by frame to packet data, then transmitted by data transmission trigger module processed
The data of 8.55kbps packet data, treated 8.55kbps do the data that rate adaptation is 64Kbps in base station, in core
Opposite end base station is transmitted transparently in net, data are reverted to the data of 8.55kbps by base station again, are sent and are divided by transparent transmission channel
For group data to callee, receiving end restores initial data by data conversion module.Similarly it is found that the calling party of communicating pair with
Callee can be mobile terminal, can also be using a side of communicating pair as mobile terminal, and another party is the clothes with communication function
Business device, working principle is as above, herein without repeating.
Further, the specific steps of packet data are transmitted by CDMA transparent transmission voice channel are as follows: calling procedure is established,
As shown in figure 4, establishment process of conversing: caller calls called party number, after callee answers, into talking state；Transparent transmission
Service negotiation process: when calling and called both sides need to carry out transparent transmission service communication, both sides pass through triggering mobile terminal sound transparent transmission industry
Business trigger module issues service switching order, and after order issues, communicating pair is simultaneously to BSC initiating business request；Transparent transmission response
Process: BSC sends service connection to terminal and establishes response message, indicates that BSC has received the request of terminal；Transparent transmission, which is established, to be completed
Process: terminal sends service connection to BSC and completes, and shows to have reached an agreement between MS and BSS, and transparent transmission channel is established, by voice
Business is converted into real-time data service；Transparent transmission is current: after establishing transparent transmission channel, BSC stops vocoder to the coding/decoding of data packet
Processing, the data packet received is handled according to the data packet in real-time data service, only transparent data packet.
Further, data are transmitted, as shown in figure 5, communicating pair can pass i.e. after the foundation of transparent transmission voice channel
Transporting packet data, call will be suspended at this time, the starting of data transmission trigger module, by packet data timing in the form of data packet
Give out a contract for a project to BSS.
Further, user actively discharges transparent transmission service process, as shown in fig. 6, i.e. communicating pair is in data penetration transmission
Traffic state, after packet data transmission, communicating pair mobile terminal shows that data pass in state display module
Defeated end prompt presses hanging up terminal key when either party thinks to need to terminate this data penetration transmission business, and terminal is to BSC
Initiating, which terminates transparent transmission request (MS Release Order), discharges this data penetration transmission business；After business is released, BSC is returned
(BS Release Order) response, identifies the service ending.
Various component embodiments of the invention can be implemented in hardware, or to run on one or more processors
Software module realize, or be implemented in a combination thereof.It will be understood by those of skill in the art that can be used in practice
Microprocessor or digital signal processor (DSP) realize some or all components in equipment according to embodiments of the present invention
Some or all functions.The present invention is also implemented as executing some or all of method as described herein
Equipment or system program (for example, computer program and computer program product).It is such to realize that program of the invention
May be stored on the computer-readable medium, or may be in the form of one or more signals.Such signal can be from
Downloading obtains on internet website, is perhaps provided on the carrier signal or is provided in any other form.
" one embodiment ", " embodiment " or " one or more embodiment " referred to herein it is meant that in conjunction with
Special characteristic, structure or the characteristic of embodiment description are included at least one embodiment of the present invention.Further, it is noted that
Here word example " in one embodiment " is not necessarily all referring to the same embodiment.
In the instructions provided here, numerous specific details are set forth.It is to be appreciated, however, that implementation of the invention
Example can be practiced without these specific details.In some instances, well known method, knot is not been shown in detail
Structure and technology, so as not to obscure the understanding of this specification.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and ability
Field technique personnel can be designed alternative embodiment without departing from the scope of the appended claims.In the claims,
Any reference symbol between parentheses 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" located in front of the element does not exclude the presence of multiple such
Element.The present invention can be by means of including the hardware of several different elements and being come by means of properly programmed computer real
It is existing.If several in these systems can be through the same hardware branch in the unit claim for listing dry systems
To embody.The use of word first, second, and third does not indicate any sequence.These words can be explained and be run after fame
Claim.
Furthermore, it should also be noted that language used in this specification primarily to readable and introduction purpose and select
Select, rather than in order to explain or defining the subject matter of the present invention and select.Therefore, without departing from the appended claims
In the case where scope and spirit, many modifications and changes are all apparent for those skilled in the art
's.For the scope of the present invention, the disclosure that the present invention is done be it is illustrative and not restrictive, the scope of the present invention by
The appended claims limit.
Although the embodiments of the invention are described in conjunction with the attached drawings, but those skilled in the art can not depart from this hair
Various modifications and variations are made in the case where bright spirit and scope, such modifications and variations are each fallen within by appended claims
Within limited range.
Claims (4)
1. a kind of method based on CDMA transparent transmission voice channel transmitting grouped data, which is characterized in that including specific following steps:
S1: communicating pair establishes transparent transmission service between the communicating pair by triggering voice transparent transmission business module；Business association
After quotient's success, that is, transparent transmission voice channel can be used；If service negotiation failure or user actively abandon transmitting, mobile terminal is straight
It taps into idle standby mode, normal speech business cannot be continued；
S2: trigger module is selected by mobile terminal data, the packet data that user is selected passes through data as data source
Conversion module is grouped processing by frame to the packet data；
S3: by data transmission trigger module, treated 8.55kbps packet data is transmitted, and by treated
The data of 8.55kbps carry out the data that rate adaptation is 64kbps in base station；
S4: opposite end base station is transmitted transparently in core net；
S5: data are reverted to the data of 8.55kbps by the base station again, and send the packet data by transparent transmission channel
To callee；
S6: receiving end restores initial data by data conversion module；
If receiving the trigger action of hanging up terminal key, terminal is initiated to terminate transparent transmission request to BSC, to discharge this data penetration transmission
Business；After business is released, BSC returning response identifies the service ending.
2. the method as described in claim 1, which is characterized in that the step S1 is specifically included:
S11: caller calls called party number, after callee answers, into talking state；
S12: when the calling party and/or callee need to carry out transparent transmission service communication, the communicating pair passes through triggering
After mobile terminal sound transparent transmission service trigger module issues service switching order and order sending, the communicating pair
To base station controller initiating business request；
S13: the base station controller sends service connection to terminal and establishes response message；
S14: the terminal sends service connection to the base station controller and completes, and transparent transmission channel is established, and voice service is turned
Turn to data service.
3. method according to claim 1 or 2, which is characterized in that further include: after establishing the transparent transmission channel, the base station
Controller stops vocoder and carries out coding and/or decoding process to data packet, by the data packet received according in data service
Data packet is handled.
4. a kind of mobile terminal characterized by comprising
Voice transparent transmission business trigger module sends voice transparent transmission industry to base station controller for calling subscriber and/or called subscriber
Business request, after the base station controller receives transparent transmission service request message, starts the transparent transmission service to the voice received
Data execute ISLP adaptation processing；
Voice transparent transmission business module, for after service negotiation success, that is, transparent transmission voice channel can be used；If service negotiation fails
Or user actively abandons transmitting, then mobile terminal is directly entered idle standby mode, cannot continue normal speech business；
Data select trigger module, select data to be transmitted for user；
Data conversion module, for the data received to be converted to the data of preset encoding and decoding format；
Data transmission trigger module transmits packet data by voice transparent transmission channel for user, wherein the data transmission touching
After sending out module starting, transparent transmission channel is sent to after target data is encoded using preset encoding and decoding format；
State display module, for showing mobile terminal current state on interface；
If receiving the trigger action of hanging up terminal key, terminal is initiated to terminate transparent transmission request to BSC, to discharge this data penetration transmission
Business；After business is released, BSC returning response identifies the service ending.
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| CN201510122401.9A CN104994546B (en) | 2015-03-19 | 2015-03-19 | Method, mobile terminal based on CDMA transparent transmission voice channel transmitting grouped data |
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| CN112165434B (en) * | 2020-06-30 | 2021-12-07 | 中兴通讯股份有限公司 | Method and system for transparent transmission of CBR signal in packet switching system |
| CN114624883B (en) * | 2022-03-08 | 2022-10-04 | 常山县亿思达电子有限公司 | Mixed reality glasses system based on flexible curved surface transparent micro display screen |
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|---|---|---|---|---|
| CN1761334A (en) * | 2005-11-11 | 2006-04-19 | 中国联合通信有限公司 | Implementation system for passing through speech, and implementation method for passing through speech |
| CN102685062A (en) * | 2000-06-22 | 2012-09-19 | 爱尔比奎特公司 | System used for data communications over digital wireless telecommunications networks |
| CN103871415A (en) * | 2012-12-14 | 2014-06-18 | 中国电信股份有限公司 | Method for realizing inter-system voice communication, system and TFO conversion device |
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2015
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102685062A (en) * | 2000-06-22 | 2012-09-19 | 爱尔比奎特公司 | System used for data communications over digital wireless telecommunications networks |
| CN1761334A (en) * | 2005-11-11 | 2006-04-19 | 中国联合通信有限公司 | Implementation system for passing through speech, and implementation method for passing through speech |
| CN103871415A (en) * | 2012-12-14 | 2014-06-18 | 中国电信股份有限公司 | Method for realizing inter-system voice communication, system and TFO conversion device |
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