CN1585445A - Method for shielding forward frame in mobile communication system - Google Patents
Method for shielding forward frame in mobile communication system Download PDFInfo
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- CN1585445A CN1585445A CN 200410027641 CN200410027641A CN1585445A CN 1585445 A CN1585445 A CN 1585445A CN 200410027641 CN200410027641 CN 200410027641 CN 200410027641 A CN200410027641 A CN 200410027641A CN 1585445 A CN1585445 A CN 1585445A
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Abstract
The method includes following steps: 1) the subscribers information is saved; when service link is built and the selecting distributing multiplex and demultiplex module is enabled, the only UI brought by process module in dedicated signaling channel 3 is saved; 2) the reverse frame is processed, after selecting and distributing multiplex and demultiplex module completes the process of reverse frame , the only UI is added into the header of reverse data frame and sent to the service processor in dispatch client for processing; 3) the forward frame is processed, the selecting and distributing multiplex and demultiplex module compares the only UI, makes relevant process, and then shields data frame in different channels.
Description
Technical field
The present invention relates to field of mobile communication, relate in particular to the implementation method of the own voice of forward direction shielding user (being called for short the forward frame shielding) in the mobile communcations system.
Background technology
Along with mobile communcations system in the increasingly extensive application of every field such as economic and social life, mobile communcations system technology itself is also among fast development, from at present just at widely used second generation mobile communcations system, arrive ripe perfect third generation mobile system, the demand of user for communication system satisfied in technical development day by day.
For any one communication system, echo canceller, mask the user's oneself who is sent back by system's loop when unusual sound, all be an indispensable critical function.The realization point of realizing echo canceller, the own voice of forward direction shielding user at present is in base station side, mobile station side or the combination of the two substantially.Common way is to rely on specialised hardware to realize according to the physical characteristic of sound, such as, variety of way such as specialised hardware realization is realized and used at mobile station side to the special asic chip that relies at the integrated shielding algorithm of base station side vocoder dsp chip, in the mobile switch porch of base station side that generally adopts at present.Obviously, the defective of prior art is: one, need extra hardware, increased system cost; Two, there is a time delay effect in it according to the method that the sound physical characteristic shields, and promptly could judge after collecting certain sound sample needs shielding, thereby causes time lag; Three, the mode that shields at mobile station side has been wasted air resource especially greatly, is unfavorable for saving the base station forward emitting power.
Summary of the invention
Technical problem to be solved by this invention be prior art owing to cost height, the time of adopting hardware to cause delay, air resource waste important disadvantages, in the hope of propose a kind of simple, mask abnormal speech in base station side, avoid the user to hear oneself echo, effectively reduce the method for hardware cost and raising air resource utilance.
For achieving the above object, the present invention proposes forward frame screen method in a kind of mobile communcations system, the mobile communcations system that relates to comprises selects distribution multiplexing and demultiplexing module (SDM, SelectedDistribute Multiplex Demultiplex Module), Dedicated Signaling Channel layer 3 processing module (DSCHP, Dedicated Signaling Channel Layer 3 Signaling Process), dispatching client Service Processing Module (DCTP, Dispatching Client Traffic Process), Dedicated Signaling Channel layer 2 processing module (LAC_DP, Signaling Link Access ControlDedicated Process), Channel Elements subsystem (CES, Channel ElementSubsystem) module such as may further comprise the steps:
The first step is preserved user profile: when service link is set up, select distribution multiplexing and demultiplexing module (SDM, Selected Distribute Multiplex Demultiplex Module) when being activated, preserve Dedicated Signaling Channel layer 3 processing module (DSCHP, Dedicated Signaling ChannelLayer 3 Signaling Process) the unique identification user's who brings information (UI, UserIndicator), as: International Mobile Subscriber Identity (IMSI, International MS Identity), Electronic Serial Number (ESN, Electronic Serial Number) etc.
Second step added the UI that preserves in the frame head of reverse data frame to after handling reverse frames: SDM selection and resolving reverse frames, sent to dispatching client Service Processing Module (DCTP, Dispatching Client Traffic Process) and handled;
The 3rd step was handled forward frame;
This step can comprise the following steps: again
1.SDM compare with the UI of the forward data frame frame head that receives and the UI of preservation,, then need to shield this Frame if identical;
2. for different channels, SDM shields this Frame in different ways:
2.1 for forward fundamental channel (FCH, Fundamental Channel), if do not receive from Dedicated Signaling Channel layer 2 processing module (LAC_DP, Signaling Link AccessControl Dedicated Process), need mail to aerial forward direction signaling, then to Channel Elements subsystem (CES, Channel Element Subsystem) sends 1/8 rate frame, to keep FCH; If receive the forward direction signaling, then send full-rate vocoding, content is signaling entirely;
2.2 for forward complement channel (SCH, Supplemental Channel), and transmission break transfer frame (Discontinuous Transmission, DTX).
Adopt the method for the invention; compared with prior art; implement very simple; need not to increase the hardware input; reduced the cost of hardware and system most possibly, and can save air resource as far as possible effectively at forward direction shielding user's oneself voice; reduce the load of mobile station side shielding, energy and other shielding modes of base station side, the shielding mode of mobile station side play the multiple protective effect of this user being heard normal speech together.Be particularly useful for the cluster communication system that a side says, listens in many ways, the situation to forward channel is shared can also effectively reduce forward emitting power.
Description of drawings
Fig. 1 is the CDMA cluster communication system schematic diagram as the method for the invention Application Example.
Fig. 2 is a mobile communcations system forward frame screen method flow chart of the present invention.
Fig. 3 is the method flow diagram as the embodiment of the invention.
Embodiment
To be example, in conjunction with the accompanying drawings technical scheme is described in further detail below at cluster communication system based on the CDMA standard:
Fig. 1 described the forward frame shielding CDMA trunking communication environment.Wherein, the base station side business relevant portion mainly comprises Base Station System Application Part (BSSAP, Base Station SystemApplication Part), DSCHP, SDM, dispatching client comprises dispatching client signaling processing module (DCSP, Dispatching Client Traffic Process), DCTP, with network side dispatch server (PDS, Press-To-Talk Dispatching Server).SDM and DCTP be interaction data on the A8 link, DCTP and PDS interaction data on A10, the corresponding user of A8, the user in one group of conversation of an A10 correspondence.During user of user's correspondence, corresponding two A8 of A10, the aerial preceding/inverted-F CH separately that uses of each user transmits preceding/reverse data and signaling; During the corresponding a plurality of user of user, corresponding many A8 of A10, the aerial preceding/inverted-F CH separately that uses of each user transmits forward direction signaling/reverse data and signaling, shares a forward direction SCH and transmits forward data.In addition, A9 and A11 are used for carrier signaling.
Fig. 2 is the flow chart of the method for the invention, as can be seen from this figure, the mobile communcations system that method proposed by the invention relates to comprises modules such as selecting distribution multiplexing and demultiplexing module, Dedicated Signaling Channel layer 3 processing module, dispatching client Service Processing Module, Dedicated Signaling Channel layer 2 processing module, Channel Elements subsystem, these modules are part indispensable in the existing mobile communications system, the method of the invention does not need to add separately any hardware facility, can not increase under the condition of cost, reach purpose of the present invention.In the method for the invention, at first need to preserve user profile: when service link is set up, when SDM is activated, preserve the UI that DSCHP brings, as: IMSI, ESN etc.
Then reverse frames is handled: after the SDM selection and resolving reverse frames, the UI that preserves is added in the frame head of reverse data frame, send to DCTP and handle.
Forward frame is handled at last, this step is a core content of the present invention again., at first compare with the UI of the forward data frame frame head that receives and the UI of preservation by SDM, if identical, then need to shield this Frame.For different channels, SDM shields this Frame in different ways: for FCH, if do not receive from LAC_DP, need mail to aerial forward direction signaling, then send 1/8 rate frame to CES, to keep FCH; If receive the forward direction signaling, then send full-rate vocoding, content is signaling entirely; For SCH, send the DTX frame.By above step, can effectively realize shielding for forward frame.Following embodiment can more clearly be described the present invention.
Fig. 3 has described in embodiments of the present invention, realizes the handling process of forward frame shielding.
301: set up the service link flow process and finish other modules that activate except that SDM;
302:SDM receives the activation message from DSCHP, carries out activation manipulation;
303:SDM preserves UI;
304:SDM selects nearest good frame from the reverse frames that receives, and signaling in the reverse frames and data are broken out, gives LAC_DP with signaling;
305:SDM adds UI in will sending to the reverse data frame frame head of DCTP;
306:SDM sends the reverse data frame to DCTP;
Whether the 307:SDM relatively UI of the UI of forward data frame frame head and preservation is identical, identically then need shield forward data frame, changes 308, and then normal multiplexing forward data of difference and signaling also send, and change 313;
Whether 308: judging currently has the forward direction signaling to send;
309: if UI is identical and the current forward direction of receiving has signaling to need to send, then rate sends the forward frame of full signaling bit at full speed, changes 311;
310: if UI is identical and current forward direction does not have signaling to need to send, then send 1/8 rate frame, change 319 to keep FCH;
311: judge whether forward direction SCH exists, have the group call that then is expressed as one-to-many, change 312; Do not exist then to be expressed as man-to-man individual call, change 319;
312: send the DTX frame, change 319;
313: if the UI difference judges then whether forward direction SCH exists; If forward direction SCH exists, then change 314; If forward direction SCH does not exist, then change 317;
314:, then carry out the processing of 308-310 if UI difference and forward direction SCH exist;
Whether check currently has the forward direction signaling to send;
If the current forward direction of receiving has signaling to need to send, then rate sends the forward frame of full signaling bit at full speed, changes 315;
If current forward direction does not have signaling to need to send, then send 1/8 rate frame to keep FCH, forward 317 to;
315 pairs of SCH forward data frame are carried out multiplexing process;
316: send forward frame to forward direction SCH channel, change 319;
317: if UI difference and forward direction SCH do not exist,, forward data frame and signaling are carried out multiplexing, form the FCH forward frame then according to the agreement regulation;
318: send forward frame to forward direction FCH channel;
319: wait for scheduled for executing next time from the data handling procedure of reverse frames processing beginning, every 20ms that crosses returns 304.
The present invention is particularly useful for the cluster communication system that a side says, listens in many ways, and the situation to forward channel is shared can also effectively reduce forward emitting power.
Claims (8)
1, forward frame screen method in a kind of mobile communcations system, the mobile communcations system that relates to comprises modules such as selecting distribution multiplexing and demultiplexing module, Dedicated Signaling Channel layer 3 processing module, dispatching client Service Processing Module, Dedicated Signaling Channel layer 2 processing module, Channel Elements subsystem, it is characterized in that, may further comprise the steps:
The first step is preserved user profile: when service link is set up, when selecting distribution multiplexing and demultiplexing module to be activated, preserve the unique identification user profile UI that Dedicated Signaling Channel layer 3 processing module are brought;
Second step was handled reverse frames: after selecting distribution multiplexing and demultiplexing module and resolving reverse frames, the unique identification user profile UI that preserves is added in the frame head of reverse data frame, send to the dispatching client Service Processing Module and handle;
The 3rd step was handled forward frame; Select relatively unique identification user profile UI of distribution multiplexing and demultiplexing module, confirm whether to shield the Frame of different channels, the Frame that shields for needs shields.
2, forward frame screen method in the mobile communcations system as claimed in claim 1 is characterized in that, described unique identification user profile UI is International Mobile Subscriber Identity IMSI or Electronic Serial Number ESN.
3, forward frame screen method in the mobile communcations system as claimed in claim 1 is characterized in that, in described second step, selects distribution multiplexing and demultiplexing module to select nearest good frame from the reverse frames that receives.
4, forward frame screen method in the mobile communcations system as claimed in claim 1 is characterized in that, described the 3rd step further may further comprise the steps:
(1) selects distribution multiplexing and demultiplexing module to compare,, then need to shield this Frame if identical with the unique identification user profile UI of the forward data frame frame head that receives and the unique identification user profile UI of preservation;
(2), select distribution multiplexing and demultiplexing module to shield this Frame in different ways for different channels.
5, forward frame screen method in the mobile communcations system as claimed in claim 4 is characterized in that, described step (1) shields this Frame and further comprises if unique identification user profile UI is identical:
(1.1) have signaling to need to send if receive forward direction, then rate sends the forward frame of full signaling bit at full speed, judges whether forward complement channel exists; If forward complement channel exists, then send the break transfer frame;
(1.2) if forward direction does not have signaling to need to send, then send 1/8 rate frame to keep forward fundamental channel.
6, forward frame screen method in the mobile communcations system as claimed in claim 4 is characterized in that, described step (2) further comprises:
(2.1),, then send 1/8 rate frame, to keep forward fundamental channel to the Channel Elements subsystem if do not receive from Dedicated Signaling Channel layer 2 processing module, need mail to aerial forward direction signaling for forward fundamental channel; If receive the forward direction signaling, then agreement sends full-rate vocoding to multiplexing regulation when not receiving forward data frame, and content is signaling entirely;
(2.2) for forward complement channel, multiplexing and transmission transmits frame.
7, forward frame screen method in the mobile communcations system as claimed in claim 1 is characterized in that, also comprises for the 4th step: wait for that scheduled for executing handles the data handling procedure of beginning next time from reverse frames, every 20MS that crosses then went back to for second step and handles.
8, forward frame screen method in the mobile communcations system as claimed in claim 7 is characterized in that, described four steps of the first step to the specifically may further comprise the steps:
301: set up the service link flow process and finish other modules that activate except that selecting distribution multiplexing and demultiplexing module;
302: select distribution multiplexing and demultiplexing module to receive, carry out activation manipulation from the activation message of Dedicated Signaling Channel layer 3 processing module;
303: select distribution multiplexing and demultiplexing module to preserve unique identification user profile UI;
304: select distribution multiplexing and demultiplexing module from the reverse frames that receives, to select nearest good frame, and signaling in the reverse frames and data are broken out, give the Dedicated Signaling Channel layer 2 processing module signaling;
305: select distribution multiplexing and demultiplexing module in will sending to the reverse data frame frame head of dispatching client Service Processing Module, to add unique identification user profile UI;
306: select distribution multiplexing and demultiplexing module to send the reverse data frame to the dispatching client Service Processing Module;
307: whether the unique identification user profile UI of selection distribution multiplexing and demultiplexing module comparison forward data frame frame head is identical with the unique identification user profile UI of preservation, identically then need shield forward data frame, change 308, then normal multiplexing forward data of difference and signaling also send, and change 313;
Whether 308: judging currently has the forward direction signaling to send;
309: if unique identification user profile UI is identical and the current forward direction of receiving has signaling to need to send, then rate sends the forward frame of full signaling bit at full speed, changes 311;
310: if unique identification user profile UI is identical and current forward direction does not have signaling to need to send, then send 1/8 rate frame, change 319 to keep the dispatching client Service Processing Module;
311: judge whether forward complement channel exists, have the group call that then is expressed as one-to-many, change 312; Do not exist then to be expressed as man-to-man individual call, change 319;
312: send the break transfer frame, change 319;
313: if unique identification user profile UI difference judges then whether forward complement channel exists; If forward complement channel exists, then change 314; If forward complement channel does not exist, then change 317;
314:, then carry out the processing of 308-310 if unique identification user profile UI difference and forward complement channel exist;
Whether check currently has the forward direction signaling to send;
If the current forward direction of receiving has signaling to need to send, then rate sends the forward frame of full signaling bit at full speed, changes 315;
If current forward direction does not have signaling to need to send, then send 1/8 rate frame to keep the dispatching client Service Processing Module, forward 317 to;
315 pairs of forward complement channel forward data frame are carried out multiplexing process;
316: send forward frame to forward direction complement channel channel, change 319;
317: if unique identification user profile UI difference and forward complement channel do not exist,, forward data frame and signaling are carried out multiplexing, form dispatching client Service Processing Module forward frame then according to the agreement regulation;
318: send forward frame to forward direction dispatching client Service Processing Module channel;
319: wait for scheduled for executing next time from the data handling procedure of reverse frames processing beginning, every 20ms that crosses returns 304.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100276412A CN100450133C (en) | 2004-06-12 | 2004-06-12 | Method for shielding forward frame in mobile communication system |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100276412A CN100450133C (en) | 2004-06-12 | 2004-06-12 | Method for shielding forward frame in mobile communication system |
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| CN1585445A true CN1585445A (en) | 2005-02-23 |
| CN100450133C CN100450133C (en) | 2009-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100276412A Expired - Fee Related CN100450133C (en) | 2004-06-12 | 2004-06-12 | Method for shielding forward frame in mobile communication system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101341770B (en) * | 2005-12-22 | 2011-07-06 | 艾利森电话股份有限公司 | Transceiving station of airborne base station for mobile communication |
| CN101341678B (en) * | 2005-12-22 | 2012-09-26 | 艾利森电话股份有限公司 | Interference equipment for mobile communication |
| CN108632476A (en) * | 2018-04-26 | 2018-10-09 | 贵阳朗玛信息技术股份有限公司 | The mobile Internet voice platform system and its communication means of combining PSTN |
-
2004
- 2004-06-12 CN CNB2004100276412A patent/CN100450133C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101341770B (en) * | 2005-12-22 | 2011-07-06 | 艾利森电话股份有限公司 | Transceiving station of airborne base station for mobile communication |
| CN101341678B (en) * | 2005-12-22 | 2012-09-26 | 艾利森电话股份有限公司 | Interference equipment for mobile communication |
| CN108632476A (en) * | 2018-04-26 | 2018-10-09 | 贵阳朗玛信息技术股份有限公司 | The mobile Internet voice platform system and its communication means of combining PSTN |
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| Publication number | Publication date |
|---|---|
| CN100450133C (en) | 2009-01-07 |
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Granted publication date: 20090107 Termination date: 20190612 |