CN100364255C - Processing method of snchronously transmitting speech service in CDMA network pack data service - Google Patents
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- CN100364255C CN100364255C CNB2004100089168A CN200410008916A CN100364255C CN 100364255 C CN100364255 C CN 100364255C CN B2004100089168 A CNB2004100089168 A CN B2004100089168A CN 200410008916 A CN200410008916 A CN 200410008916A CN 100364255 C CN100364255 C CN 100364255C
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- 238000003672 processing method Methods 0.000 title claims description 19
- 230000004913 activation Effects 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 35
- 230000008569 process Effects 0.000 claims abstract description 24
- 238000012545 processing Methods 0.000 claims abstract description 14
- 230000000284 resting effect Effects 0.000 claims description 29
- 230000008859 change Effects 0.000 claims description 7
- 230000004048 modification Effects 0.000 claims description 7
- 238000012986 modification Methods 0.000 claims description 7
- 230000005059 dormancy Effects 0.000 claims description 4
- 210000003746 feather Anatomy 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 2
- 238000011084 recovery Methods 0.000 claims 1
- 230000003213 activating effect Effects 0.000 abstract 1
- 238000010295 mobile communication Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
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Abstract
The present invention discloses a method for processing concurrent speech services in grouping data services of a CDMA network. The method comprises the steps that a mobile switching center (MSC) receives a termination speech call of a terminal during activating a grouping data call; MSC judges whether the speech service is accessed to the terminal; if the speech service is confirmed to be accessed, the grouping data call enters a dormant state from an activation state, else MSC refuses to access the call to the terminal; MSC triggers the termination speech call establishment process of the terminal to establish the termination speech call of the terminal and enter a conversation state; after the speech call ends, the grouping data call enters the activation state from the dormant state. The method for processing concurrent speech services in grouping data services of a CDMA network, which is proposed by the present invention, realizes the priority of the speech services under specific conditions, solves the problem that the existing CDMA networks can not process concurrent services, and provides convenience for users to use the services of the CDMA mobile network.
Description
Technical field
The present invention relates to a kind of CDMA of being applied to (code division multiple access) mobile network's the concurrent processing method of multi-service, in especially a kind of cdma network, in Packet data service is carried out, the processing method when voice service is simultaneously concurrent asks is arranged.
Background technology
Mobile communication has become an important part of people's daily life in current society, how become the major issue that moving communicating field is paid close attention to for the user provides more, better service.In the cdma mobile communication network, voice service and Packet data service are two basic services that provide for the user, but, present most of cdma mobile communication network, do not consider voice and packet data concurrent service in the design, all can't support the concurrent of two kinds of business, promptly can not handle two kinds of different business simultaneously, if a professional well afoot, mobile communication system will be refused another kind of professional access.
Relatively and data service, voice service has higher real-time, the mobile network should guarantee as far as possible that voice service obtains preferential processing, still, because the data traffic of Packet data service may be bigger, continue very long a period of time, if during carrying out Packet data service, there is important phone to squeeze into, the user then can't answer, therefore, may bring a lot of inconvenience to the user.From the Qos of macroscopic view, the decline of this unreasonable service quality that causes owing to network design, management is that all Virtual network operator and service providers do not wish to take place.
Therefore, how to handle Packet data service and carry out voice service concurrent in the process,, become a difficult problem anxious to be solved in the current C DMA network system for the user facilitates.
Summary of the invention
Technical problem to be solved by this invention is: the processing method that concurrent voice service in a kind of cdma network Packet data service is provided, under certain condition, Packet data service is suspended, voice service is preferentially carried out, then, carry out uncompleted Packet data service more again; Thereby the service that facilitates for the user.
The processing method of concurrent voice service comprises the steps: in the cdma network Packet data service of the present invention
Step 1, between the packet data call active period, moving exchanging center MSC is received the terminating voice call of terminal;
Step 2, MSC judge that whether this calling satisfies the condition that inserts this terminal, if satisfy, then changes current packet data call over to resting state by state of activation; Otherwise the MSC refusal accesses terminal this calling;
Step 3, MSC triggering terminal terminating voice call are set up process;
Step 4, set up the voice call of terminal terminating, enter talking state;
After step 5, voice call finish, packet data call is entered state of activation by resting state;
In the described step 2, MSC judges that whether this calling satisfies the condition that inserts this terminal, specifically comprises:
Step 20, need to judge whether the distribution service channel, if desired, then carry out next step; Otherwise, refuse this calling;
Step 21, judge whether to be in the packet data call state of activation, if desired, then carry out next step; Otherwise the step by generally inserts this calling;
Step 22, judge whether terminal needs to activate Call Waiting, if desired, then carry out next step; Otherwise, handle or refuse this calling by user's setting in advance.
The present invention is by the processing method of concurrent voice service in the Packet data service that proposes, realized the preferential of the voice service under the certain condition, solved existing C DMA network and can't handle the difficult problem of voice and packet data concurrent service, provided convenience for the user uses CDMA mobile network's service.
Description of drawings
Fig. 1 is the schematic flow sheet that the present invention handles voice service;
Fig. 2 is that the present invention judges whether schematic flow sheet that calling is accessed terminal;
Fig. 3 is that BS receives the schematic flow sheet of MSC " Paging Request " and MS " OriginationMessage (SO=33) " simultaneously.
Embodiment
The present invention is that aloft interface (Release 0) is not done any message modification; The A interface does not increase new information, uses in the IOS4.0 standard under the existing information unit mechanism; When terminal/mobile station MS is in packet data call, SERVICE OPTION=33, state of activation the time, if the terminating voice call of this terminal is arranged, the method that cdma network is handled this voice call.Whether cdma network promptly allows terminating call according to the voice service authority of terminal, handles this calling; If the user agrees to answer, change packet data call over to resting state by state of activation, carry out the called process of normal speech then, voice service enters state of activation with packet data call by resting state after finishing again.
As shown in Figure 1, technical solutions according to the invention comprise the steps:
Step 1, between the packet data call active period, moving exchanging center MSC is received the terminating voice call of terminal;
Step 2, MSC judge whether this voice service inserts this terminal, if confirm to insert, then change packet data call over to resting state by state of activation; Otherwise the MSC refusal accesses terminal this calling;
Step 3, MSC triggering terminal terminating voice call are set up process;
Step 4, set up the voice call of terminal terminating, enter talking state;
After step 5, voice call finish, packet data call is entered state of activation by resting state.
Above process is finished by the common cooperation of moving exchanging center MSC, group data service node PDSN, base station controller BSC/packet data control device PCF and terminal/mobile station MS.
Respectively each step of technical solution of the present invention is described in detail below.
Shown in Figure 2 is in the step 2 of the present invention, and whether MSC inserts the concrete deterministic process of this calling, specific as follows:
Step 20, need to judge whether the distribution service channel, if desired, then carry out next step; Otherwise, refuse this calling;
Step 21, judge whether to be in the packet data call state of activation, if desired, then carry out next step; Otherwise the step by generally inserts this calling;
Step 22, judge whether terminal activates Call Waiting, if desired, then carry out next step; Otherwise, handle or refuse this calling by user's setting in advance.
MSC judges that the flow process of handling according to normal speech judges whether to divide the wireless channel that is used in this calling to the user, if the user haves no right the voice call that terminates, as since arrearage stopped should business, perhaps the user has activated unconditioned call connection or supplementary service such as call forwarding on busy, and then refusal inserts the user with this speech.
If judging, MSC should distribute radio traffic channel to the user, then continue to judge whether the user still is in the grouped data state of activation, if the user no longer has been in the grouped data state of activation, illustrate that at this moment the user grouping data service is through with, then can insert this voice call by existing course of normal operation in the cdma network.
If MSC judges that the user is in the grouped data state of activation, then continue to judge whether the user has activated call waiting, if user's un-activation should business, then can't continue to insert this calling to the user, at this moment, can handle by user's setting in advance, as be transferred to the service centre of user's setting or refuse this calling.
Handle concurrent customer's terminating speech in the Packet data service and be the service of a kind of newtype that cdma network provides for the user, therefore, in Packet data service, whether concurrent speech inserts should be judged equally whether the user has activated this business.More convenient flexible way is to adopt the existing supplementary service activation mechanism of cdma network, is that concurrent voice service is distributed new business sign indicating number Feature code, and the user is free to select the registration, activation, deexcitation should business like this; But, apply for new service code (Feature code), need the 3GPP2 approval, in order to reduce change to network system, the present invention can also adopt the business of the preferential access of concurrent voice service in the Packet data service and the method for call waiting while activation, remove this step deterministic process, the method for specific implementation is as follows:
The activation of the preferential access service of concurrent voice service in the Packet data service, mode by Feather Code realizes, its Feather Code value is identical with the employed FeatherCode value of Call Waiting, promptly when Call Waiting activates, the function of concurrent speech also activates simultaneously in the Packet data service, in other words, for Call Waiting activated, the preferential business that inserts of concurrent voice service was default opening in the Packet data service.
After the completing steps two described deterministic processes, the present invention can also provide a kind of real-time selection controlled function to the user, and the user can select whether to make the Packet data service dormancy and the speech of preferentially answering incoming call.Like this, if the user when to think Packet data service more even more important than the voice call that inserts, can not end Packet data service, refuse this calling.
The present invention adopts " Flash with information " message notifying user whether to connect this calling, promptly when having audio call to enter in the process of using data service, MSC will use this user of " FlashWith Information " message informing, whether receive audio call by user's decision, if decision receives, MS responds by " Flash With Information Ack ", BS removes Traffic Channel makes data service enter the Dormant state, and data call reentered the Active state with activation after the user finished audio call.If this audio call is not answered in user's decision, then adopt " Flash withinformation " message to notify MSC equally by BS, refuse this calling by MSC.
Adopt this mode, the user can determine whether to answer voice call according to actual needs, if select the refusal voice call can not produce any influence to current data service; Certainly, need MSC, BSC and terminal all to support " Flash With Information " message this moment.
If select not use Flash With Information message informing user, when using data service, if there is audio call to enter, Traffic Channel is directly removed by system for the user, change data call over to the Dormant state, initiate normal Voice Paging flow process then.The user is after finishing audio call, and system changes data call over to the Active state.Adopt this mode not need MSC, BSC and terminal all to support Flash With Information message, it is easier to realize.
Step 2 of the present invention is described to change packet data call over to resting state, as shown in Figure 1, comprises the steps:
Step 200, MSC send " Clear Command " message to BSC/PCF, and ' Cause ' IE wherein should be made as ' 10H, Pachet call going dormant ';
Step 201, BSC/PCF receive that ' Cause ' value is for after " Clear Command " message of ' 10H ', control BS sends " Service Option Control " message to MS, the grouped data doze output of MS is set, force travelling carriage to enter resting state, ' DORM_CNTL ' field in the described message is changed to ' 001 ', and ' DORM_TIME ' field can be changed to 3-15 second;
Carry out packet data call enters resting state from state of activation processing between step 202, MS, BSC/PCF and the PDSN;
Step 203, BS send " Clear Complete " message to MSC, and MS enters the resting state of packet data call.
In order to realize said process, realize the preferential access of voice service, need to revise the content of following message, 3GPP2.A.S0001.1 (in June, 2000) 6.1.2.21 is made modification, increase ' Cause ' IE and be made as ' 10H, " Clear Command " message of Pachet call going dormant ', amended text is as follows, (underscore represent increase part)
| Information Element | Section Reference | Element Direction | Type | |
| Message Type | 6.2.2.4 | MSC->BS | M | |
| Cause | 6.2.2.19 | MSC->BS | M a | |
| Cause Layer 3 | 6.2.2.55 | MSC->BS | O b | C |
a.This mandatory element indicates the reason for sending the Clear Commandmessage to the BS.Allowable values：call processing，OAM&P intervention，equipment failure，
Packet call going dormant，handoff successful，protocol errorbetween BS and MSC，reversion to old channel，do not notify MS.
If the Clear Command message is being sent in response to a Clear Requestmessage that contained a cause value of“call processing，”then this elementshall be set to“call processing.”
b.This element is only used when the MSC initiates call clearing.The CauseLayer 3 element shall be present only when the Cause element contains a valueof″Call processing.″Allowable Cause Layer 3 values are：Normal clearing，User busy，User alerting no answer，and Normal unspecified.
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | Octet |
| _BSMAP Header：Message Discrimination＝[00H] | 1 | |||||||
| Length Indicator(LI)＝[04H，08H] | 2 | |||||||
| _Message Type＝[20H] | 1 | |||||||
| _Cause：A1 Element Identifier＝[04H] | 1 | |||||||
| Length＝[01H] | 2 | |||||||
| Ext＝ [0] | Cause Value＝ [07H(OAM&P intervention)， 09H(call processing)， 0AH(reversion to old channel)， 10H(Packet call going dormant) 0BH(handoff successful)， 20H(equipment failure)， 60H(protocol error between BS and MSC)， 78H(Do not notify MS)] | 3 | ||
| _Cause Layer 3：A1 Element Identifier＝[08H] | 1 | |||
| Length＝[02H] | 2 | |||
| Ext＝ [1] | Coding Standard ＝[00](Q.931) | Reserved ＝[0] | Location＝[0100] (Public network serving the remote user) | 3 |
| Ext＝ [1] | Cause Value＝ [10H(normal clearing)， 11H(user busy)， 13H(user alerting-no answer)， 1FH(normal unspecified)] | 4 | ||
By above modification, the present invention has realized above-mentionedly carrying out in the process when Packet data service, during concurrent voice service, changes data service over to resting state; After grouped data entered resting state, air interface resource was released, but the PPP of grouped data (point-to-point) connection still is in hold mode.
In the above-mentioned step 201, timer is set, forces travelling carriage to enter resting state, prevent that travelling carriage from constantly initiating data page before by voice call paging success; Have only behind timer expiry, MS just allows grouped data to enter state of activation.Be 3-15 second the time optimal of timer setting, if the time that is provided with is too short, not paging success of voice call may occur, and timer then; If it is not overtime yet that the overlong time that is provided with, voice service finish the possibility timer, be not easy to restart Packet data service.
In the above-mentioned step 202, carry out packet data call (seeing that above-mentioned 3GPP revises text) when state of activation enters the processing of resting state and existing BSC/PCF and receives ' Cause ' value for other values between MS, BSC/PCF and the PDSN, make packet data call identical from the processing that state of activation enters resting state.
After Packet data service enters resting state, press the normal process of cdma network A interface specification definition, MSC triggers Mobile Terminated voice call and sets up process, and MSC sends " PagingRequest " message to BS, after BS receives this message, send " Paging Message " message to MS; BS, MS and MSC carry out Mobile Terminated voice call and set up process by step under the normal situation, and after the called MS ring, user's call establishment enters talking state.
After voice service is finished, carry out described step 5, recover Packet data service, comprise the steps:
Step 50, BS, MS and MSC carry out the reset procedure of voice call by step under the normal condition;
Step 51, MS recover the user interface that the data service before the Packet data service dormancy is used, and keep the resting state of packet data call;
Step 52, when MS and cdma network have transfer of data, will carry out packet data call enters state of activation from resting state processing procedure.
Like this, after voice call was finished, the user can proceed uncompleted Packet data service.
After the above-mentioned step 50, comprise the steps:
If the non-activationary time of PPP surpasses the time that timer is provided with, then PDSN rebulids the PPP connection of standard; If do not have overtimely, then directly recover original PPP and connect, execution in step 51 then.After the non-activationary time of PPP surpassed the non-Active Timer of PPP of PDSN, the PDSN side can connect the PPP of this MS removed and is released to the MS IP address allocated.Because this moment, MS was in the voice call state, therefore, can't receive that PDSN discharges the message of PPP.At this moment when the MS side from resting state when state of activation shifts, PDSN will initiate the process that rebulids of the PPP of standard.
In the above-described step 2, after the data packet services dormancy, if the user does not wish to stop Packet data service, may file a request again, send the grouped data request of " Origination Message (SO=33) ", at this moment should continue to carry out Packet data service, the refusal calling.
Two kinds of situations that may occur are, after BS receives that simultaneously MSC's " Paging Request " and MS " Origination Message (SO=33) " or BS issue " Paging Message ", receive " Origination Message (SO=33) " of MS.For both of these case, can adopt same flow process to handle, as shown in Figure 3:
When Packet data service enters resting state, after BS receives that simultaneously MSC's " Paging Request " and MS " Origination Message (SO=33) " or BS issue " Paging Message ", after receiving " Origination Message (SO=33) " of MS, specific as follows:
Step 60, BS send " Base Station Ack Order " to MS, acknowledge receipt of the request of " Origination Message (SO=33) " that MS sends;
Step 61, BS send " CM (Connect Management) service request " message of SO=33 to MSC;
Step 62, packet data call is entered state of activation from resting state;
Step 63, MSC refuse this calling.
The present invention is by the modification of 3GPP2 agreement, and aloft interface (Release 0) is not done any message modification; The A interface does not increase new information, under the existing information unit mechanism, realized in the Packet data service the preferential access of voice service in the use IOS4.0 standard, solved existing C DMA network and can't handle the difficult problem of voice and packet data concurrent service, provided convenience for the user uses CDMA mobile network's service.
It should be noted last that: above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, although the present invention is had been described in detail with reference to the foregoing description, those of ordinary skill in the art is to be understood that: still can make amendment or be equal to replacement the present invention, and not breaking away from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (12)
1. the processing method of concurrent voice service in the cdma network Packet data service is characterized in that: comprise the steps:
Step 1, between the packet data call active period, moving exchanging center MSC is received the terminating voice call of terminal;
Step 2, MSC judge that whether this calling satisfies the condition that inserts this terminal, if satisfy, then changes current packet data call over to resting state by state of activation; Otherwise the MSC refusal accesses terminal this calling;
Step 3, MSC triggering terminal terminating voice call are set up process;
Step 4, set up the voice call of terminal terminating, enter talking state;
After step 5, voice call finish, change the current resting state packet data call that is in over to state of activation again;
In the described step 2, MSC judges that whether this calling satisfies the condition that inserts this terminal, specifically comprises:
Step 20, need to judge whether the distribution service channel, if desired, then carry out next step; Otherwise, refuse this calling;
Step 21, judge whether to be in the packet data call state of activation, if desired, then carry out next step; Otherwise the step by generally inserts this calling;
Step 22, judge whether terminal needs to activate Call Waiting, if desired, then carry out next step; Otherwise, handle or refuse this calling by user's setting in advance.
2. the processing method of concurrent voice service in the cdma network Packet data service according to claim 1 is characterized in that: the business that concurrent speech preferentially inserts in the business of Call Waiting and the Packet data service in the described step 22 is in the activation state simultaneously.
3. the processing method of concurrent voice service in the cdma network Packet data service according to claim 2, it is characterized in that: preferential business and the call waiting that inserts of concurrent speech is in the activation state simultaneously in the described Packet data service, realizes in the following way:
The preferential business that inserts of concurrent voice service adopts the mode of condition code Feather Code to realize activation in the described Packet data service, and its Feather Code value is identical with the employed value of Call Waiting.
4. the processing method of concurrent voice service in the cdma network Packet data service according to claim 1 is characterized in that: after the described step 22, also comprise:
MSC adopts " flash with information " message notifying user whether to connect this calling, if the user agrees to connect, then execution in step three; Otherwise, refuse the access of this calling.
5. the processing method of concurrent voice service in the cdma network Packet data service according to claim 1 is characterized in that: in the described step 2, change packet data call over to resting state by state of activation, comprise the steps:
Step 200, MSC send " Clear Command " message to BSC/PCF, and ' Cause ' IE wherein should be made as ' 10H, Pachet call going dormant ';
Step 201, BSC/PCF receive that ' Cause ' value is for after " Clear Command " message of ' 10H ', control BS sends " Service Option Control " message to MS, the grouped data doze output of MS is set, ' DORM_CNTL ' field in the message is changed to ' 001 ', and ' DORM_TIME ' field can be changed to 3-15 second;
Normal process by the definition of cdma network A interface specification between step 202, MS, BSC/PCF and the PDSN carries out packet data call enters resting state from state of activation processing;
Step 203, BS send " Clear Complete " message to MSC, and MS enters the resting state of packet data call.
6. the processing method of concurrent voice service in the cdma network Packet data service according to claim 5 is characterized in that: described step 200, adopt following method to realize:
3GPP2.A.S0001.1.6.1.2.21 is made modification, increase ' Cause ' IE and be made as ' 10H, " Clear Command " message of Pachet call going dormant '.
7. the processing method of concurrent voice service in the cdma network Packet data service according to claim 1, it is characterized in that: in the step 3, described MSC triggers Mobile Terminated voice call and sets up process and be specially: MSC sends " Paging Request " message to BS, after BS receives this message, send " Paging Message " message to MS.
8. the processing method of concurrent voice service in the cdma network Packet data service according to claim 1, it is characterized in that: described step 4, be specially: after MS receives " Paging Message " message, carry out Mobile Terminated voice call by BS, MS and MSC and set up process, after the called MS ring, user's call establishment enters talking state.
9. the processing method of concurrent voice service in the cdma network Packet data service according to claim 1, it is characterized in that: described step 5 comprises the steps:
Step 50, BS, MS and MSC carry out the reset procedure of voice call;
Step 51, MS recover the user interface that the data service before the Packet data service dormancy is used, and keep the resting state of packet data call;
Step 52, when MS and cdma network have transfer of data, will carry out packet data call enters state of activation from resting state processing procedure.
10. the processing method of concurrent voice service in the cdma network Packet data service according to claim 9 is characterized in that: before the described step 51, comprise that also recovering point-to-point PPP connects:
If the non-activationary time of PPP surpasses the time that timer is provided with, then PDSN rebulids the PPP connection of standard; If do not have overtimely, then directly recover original PPP and connect, execution in step 51 then.
11. the processing method of concurrent voice service in the cdma network Packet data service according to claim 1 is characterized in that: after the described step 2, also comprise:
If BS receives the SO=33 that MSC's " Paging Request " and MS sends " Origination Message " simultaneously, after perhaps BS issues " Paging Message ", receive the SO=33 that MS sends " Origination Message ", then recover current Packet data service, the refusal calling.
12. the processing method of concurrent voice service in the cdma network Packet data service according to claim 11 is characterized in that: described recovery Packet data service, refuse this calling, specifically comprise the steps:
Step 60, BS send " Base Station Ack Order " to MS, acknowledge receipt of the request of the SO=33 that MS sends " Origination Message ";
Step 61, BS send " CM service request " message of SO=33 to MSC;
Step 62, packet data call is entered state of activation from resting state;
Step 63, MSC refuse this calling.
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| US7649842B2 (en) * | 2005-09-29 | 2010-01-19 | Motorola, Inc. | Method of selective dormant data session reactivation |
| CN104540110B (en) * | 2008-07-30 | 2019-02-01 | 中兴通讯股份有限公司 | The treating method and apparatus of multimedia message notification message, multimedia message receive system |
| CN101764645B (en) * | 2010-01-21 | 2014-04-09 | 中兴通讯股份有限公司 | Method and device for realizing speech concurrent data |
| CN102300183A (en) * | 2011-06-03 | 2011-12-28 | 中兴通讯股份有限公司 | Method and device for protecting data service |
| CN113133104B (en) * | 2019-12-31 | 2023-02-28 | 中国移动通信集团北京有限公司 | Service concurrent processing method, device, equipment and medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6192237B1 (en) * | 1996-12-04 | 2001-02-20 | British Telecommunications Public Limited Company | Call set-up process |
| US6285667B1 (en) * | 1998-12-02 | 2001-09-04 | Telefonaktiebolaget Lm Ericsson | Page response on existing radio signaling channel |
| WO2002039768A1 (en) * | 2000-11-13 | 2002-05-16 | Telefonaktiebolaget Lm Ericsson | Method and arrangement for improved interwoven transfer of voice traffic and data traffic in a cellular telephony network |
| CN1423442A (en) * | 2001-11-23 | 2003-06-11 | 深圳市中兴通讯股份有限公司 | Method and apparatus for parallel realizing CDMA circuit data and voice business |
| CN1512696A (en) * | 2002-12-31 | 2004-07-14 | 华为技术有限公司 | Method for realizing voice prority service in data and voice interaction |
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2004
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6192237B1 (en) * | 1996-12-04 | 2001-02-20 | British Telecommunications Public Limited Company | Call set-up process |
| US6285667B1 (en) * | 1998-12-02 | 2001-09-04 | Telefonaktiebolaget Lm Ericsson | Page response on existing radio signaling channel |
| WO2002039768A1 (en) * | 2000-11-13 | 2002-05-16 | Telefonaktiebolaget Lm Ericsson | Method and arrangement for improved interwoven transfer of voice traffic and data traffic in a cellular telephony network |
| CN1423442A (en) * | 2001-11-23 | 2003-06-11 | 深圳市中兴通讯股份有限公司 | Method and apparatus for parallel realizing CDMA circuit data and voice business |
| CN1512696A (en) * | 2002-12-31 | 2004-07-14 | 华为技术有限公司 | Method for realizing voice prority service in data and voice interaction |
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