CN101159442B - Method and base station of enhancing voice quality - Google Patents
Method and base station of enhancing voice quality Download PDFInfo
- Publication number
- CN101159442B CN101159442B CN2007100477491A CN200710047749A CN101159442B CN 101159442 B CN101159442 B CN 101159442B CN 2007100477491 A CN2007100477491 A CN 2007100477491A CN 200710047749 A CN200710047749 A CN 200710047749A CN 101159442 B CN101159442 B CN 101159442B
- Authority
- CN
- China
- Prior art keywords
- trau
- bts
- error code
- code switch
- transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The embodiment discloses a method for enhancing voice quality, which includes the following steps: expanding the transmission bandwidth between BTS and BSC; adding corrective mechanism to TRAU frame between TRAU and the BTS. A base station for enhancing voice quality is also disclosed, including: transmission bandwidth expanding unit used for expanding the transmission bandwidth between BTS and BSC; TRAU transmission corrective unit used for adding a corrective mechanism between TRAU and BTS. With the embodiment offered by the invention, the bit error rate in transmission is reduced and the voice quality is enhanced through the expansion of data transmission bandwidth and the corrective mechanism added to the data transmission process.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of method and base station that strengthens voice quality.
Background technology
In mobile communication,, mainly be to adopt voice signal is carried out compressed encoding to improve the method for bandwidth availability ratio in the prior art in order effectively to utilize the transmission bandwidth of air interface.With gsm communication system (Global System for Mobile communications, global system for mobile communications) is example, FR (Full Rate speech codec, the full-speed voice encoding and decoding) encoding and decoding speech is PCM (the Pulse Code Modulation with 64Kbps, pulse code modulation) Speech Signal Compression is to 13Kbps, HR (HalfRate speech codec, half-rate speech encoding and decoding) speech business is then arrived 5.6Kbps with the PCM Speech Signal Compression of 64Kbps.Professional down at half rate AMR (Adaptive Muti-Rate speech codec, adaptive multi-rate speech encoding and decoding), then minimum can be with the PCM Speech Signal Compression of 64Kbps to 4.75Kbps.Under the semi-velocity speech coding, because very high to the compression ratio of raw tone, the speech parameter that coding produces all is of great rarity, in case make a mistake because of reasons such as transmission error code cause these parameters, will produce very big damage to voice quality.
As shown in Figure 1, be the structured flowchart of gsm system.Wherein BSS (Base StationSubsystem, base station sub-system) realizes sending and receiving information by wireless mode, and carries out the management of Radio Resource; NSS (Network SubSystem, network subsystem) is responsible for the management of communication service, handles the exchange that external network and mobile subscriber call out.OSS (Operating Support System, subsystem is supported in operation) then provides these actual motions control, maintenance and management partly for operator.BSS is made up of BTS (Base Transceiver Station, base transceiver station) and BSC (Base StationController, base station controller) two parts functional entity.Also comprise TRAU (Transcoding and Rate Adaptation Unit in the BSS side, rate adapted code conversion unit), realize adaptive adaptive to the A interface rate of data service rate, and the low rate voice coding modes is to the conversion of A interface 64Kbps voice coding modes.According to the gsm protocol regulation, TRAU can be placed on the BTS side, also can be placed on the BSC side.In order to save transmission bandwidth between BTS and BSC, generally TRAU is placed on the BSC side.Adopt the synchronization frame of serial to carry out transfer of data between TRAU and the BTS, be called trau frame.
In the gsm system, come transmit traffic data by trau frame between BTS and the TRAU unit, trau frame sends a frame every 20ms, providing 8Kbps (under the semi-velocity speech coding mode between BTS and the TRAU, 160 bits of every frame) or the transmission bandwidth of 16Kbps (under the full-speed voice coded system, 320 bits of every frame).With reference to GSM08.60,08.61 agreement, trau frame is made up of synchronization bit, control bit and data bit three parts.Bit frame be in the trau frame some 0 and 1, shown in grey color part among Fig. 2.The quantity of trau frame 0,1 synchronization bit and position are to be used for the beginning of judgment frame and the important evidence of end position, are called frame alignement pattern.Fig. 2 is the trau frame form under the professional 7.4Kbps speed of half rate AMR, the form difference of the trau frame of different business.Because business data processing must be unit with complete trau frame, so BTS and TRAU receive complete trau frame, is the prerequisite of carrying out Business Processing.Except that business datums such as transmission speech coding parameters, also transmit the control information between base station and the TRAU in the trau frame.Whether available etc. such as the speed of encoding and decoding, present frame.
In order to promote voice quality, introduce the AMR code encoding/decoding mode in the gsm system.Under half rate AMR business, the voice coding modes of 5 kinds of speed such as support 4.75,5.15,5.9,6.7,7.4Kbps.For different speed, the transmission bandwidth that each user takies between BTS and TRAU all is 8Kbps.Therefore the speech coding trau frame synchronous form of different rates generally also is different, and speed is high more, and then synchronization bit is few more.7.4Kbps the trau frame synchronous head form of speed as shown in Figure 2.As can be seen, 7.4Kbps speed trau frame is made up of 160 bits.0,1 synchronization bit of this trau frame considerably less (what grey color part showed be bit frame, has only 6), the position of 0,1 appearance relatively disperses.
The applicant finds in realizing process of the present invention, owing to adopt trau frame to transmit data between BTS and the TRAU at present, that wherein adopts CRC (Cyclic Redundancy Check, cyclic redundancy check (CRC)) has only error detection function, no error correction.And, when transmission error code causes receiving terminal CRC to calculate not matching, even only wrong 1 bit wherein because of CRC check does not have error correction, also can only abandon this frame.That is to say that the transfer of data between base station and TRAU do not have error correcting coding function.Therefore therefore the error rate of transfer of data, under the situation that the error in data transmission occurs, causes voice quality to reduce than higher.
Summary of the invention
The purpose of the one or more embodiment of the present invention is to provide a kind of method and base station that strengthens voice quality, adopt method of the present invention and base station, can pass through the growth data transmission bandwidth, in data transmission procedure, increase mechanism for correcting errors, to realize reducing transmission error rates, improve voice quality.
For addressing the above problem, the embodiment of the invention provides a kind of method that strengthens voice quality, comprises
Step:
Transmission bandwidth between expansion BTS and the BSC;
Increase mechanism for correcting errors in the trau frame between TRAU and described BTS.
A kind of base station that strengthens voice quality also is provided, has comprised:
The transmission bandwidth expanding element is used for: the transmission bandwidth between expansion BTS and the BSC;
TRAU transmits error correction unit, is used for: the trau frame between TRAU and described BTS increases mechanism for correcting errors.
Compared with prior art, the embodiment of the invention has the following advantages:
Transmission bandwidth by between expansion BTS and the BSC increases mechanism for correcting errors in the trau frame between TRAU and BTS, can reduce transfer of data because bandwidth not enough, do not have mechanism for correcting errors and the error rate of the high probability that causes, promote voice communication quality.
Description of drawings
Shown in Figure 1 is the structured flowchart of gsm system;
Shown in Figure 2 is the professional 7.40Kbps speed of half rate AMR trau frame format structure figure;
Shown in Figure 3 is the flow chart of first embodiment of the method for enhancing voice quality of the present invention;
Shown in Figure 4 is the flow chart of second embodiment of the method for enhancing voice quality of the present invention;
Shown in Figure 5 is the block diagram of first embodiment of the base station of enhancing voice quality of the present invention;
Shown in Figure 6 is that various embodiments of the present invention are to speech parameter error correction coding/decoding process schematic diagram.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the embodiment of the invention is done further and to be elaborated.
As shown in Figure 3, be first embodiment of the method for enhancing voice quality of the present invention, comprise step:
Transmission bandwidth between S301, expansion BTS and the BSC;
Increase mechanism for correcting errors in S302, the trau frame between TRAU and BTS.
By the above embodiment of the present invention, the transmission bandwidth between expansion BTS and the BSC increases mechanism for correcting errors in the trau frame between TRAU and BTS, can reduce the error rate of transfer of data, promotes voice communication quality.
Wherein, in the above-described embodiments, the data between described BTS and the described BSC can be the half rate encoded forms.
Wherein, before carrying out the foregoing description, can comprise step: open default anti-error code switch, described anti-error code switch can be arranged on the BTS, and described anti-error code switch comprises anti-error code switch of website or the anti-error code switch of user.
Wherein, if adopt microwave transmission between described BTS and the described BSC, or there is transmission error code between described BTS and the described BSC, or other need improve data transmission quality between described BTS and the described BSC, then revise described BTS or BSC configuration data, open anti-error code switch of website ABIS interface or the anti-error code switch of user ABIS interface.Wherein, the reason that occurs transmission error code between described BTS and the described BSC may be the transmission equipment failure and other reasons.
Wherein, described anti-error code switch can be anti-error code switch of website or the anti-error code switch of user, if the anti-error code switch opens of website, then for all adopt the user of half-rate speech conversation under this website, the described BTS of described website and the transmission bandwidth between the described BSC are expanded to 16Kbps by 8Kbps, adopt the frame alignement pattern of similar full rate AMR business to transmit the data of voice under the half rate, and increase mechanism for correcting errors in the trau frame between TRAU and BTS; If the anti-error code switch opens of user, when then adopting the half-rate speech conversation for this user, BTS and TRAU just carry out anti-error code at this user to be handled, with in this user data transmission all described BTS of process and the transmission bandwidth between the described BSC expand to 16Kbps by 8Kbps, adopt the frame alignement pattern of similar full rate AMR business to transmit the data of voice under the half rate, and increase mechanism for correcting errors in the trau frame between TRAU and BTS; If the described anti-error code switch of opening is anti-error code switch of website and the anti-error code switch of user, then all described BTS of user data process described website, described and the transmission bandwidth between the described BSC are expanded to 16Kbps by 8Kbps, in all TRAU of user data process described website, described and the trau frame between the described BTS, increase mechanism for correcting errors.
Wherein, the mechanism for correcting errors of the increase described in the foregoing description is specially:
After the bandwidth between TRAU and the BTS expands to 16Kbps by 8Kbps, because the restriction of bandwidth, can't increase mechanism for correcting errors to all business datums, the more preferred important business datums of this programme such as control bit, CRC check bit and the speech parameter error correction coding/decoding that divides into groups, certainly, also can select in above-mentioned three kinds of business datums a kind of, two kinds or all, to improve the quality of transfer of data.The method of error correction coding/decoding of dividing into groups can adopt relatively more current efficient ways, and this belongs to one of ordinary skill in the art's general knowledge.For the those skilled in the art, also can only carry out error correction coding to important speech parameter, important speech parameter is according to the regulation of relevant standard agreement, according to the significance level of speech parameter, speech parameter is divided into IA, IB, II class.Certainly, relevant with filter speech parameter also is important speech parameter.Wherein certainly in other embodiments,, the bandwidth between TRAU and the BTS can be expanded to wideer degree, thereby all transmission data are increased mechanism for correcting errors, improve the quality of transfer of data comprehensively if think and be necessary.For the those skilled in the art, this variation does not exceed protection scope of the present invention.
As shown in Figure 4, by in BTS, increasing the anti-error code switch configuration of website, selection has the specific base stations of anti-error code beginning to open the anti-error code function of Abis interface, just having obtained is second embodiment of method of enhancing voice quality of the present invention, for half rate 7.4Kbps AMR business, adopt the gloomy sign indicating number of Ai Bulang to carry out error correction coding in the present embodiment, this method embodiment comprises step:
S401, when microwave is adopted in the transmission between certain BTS and the BSC, perhaps because of the transmission equipment fault, when having transmission error code between BTS and the BSC, revise this BSC data configuration, according to amended BSC configuration, BTS opens the anti-error code switch of website Abis interface; Certainly, in other embodiments, also the data configuration among the BSC can be arranged to the anti-error code switch of website Abis interface is normally open, as long as BSS carries out initialization, just opens the anti-error code switch of website Abis interface;
S402, described BTS notify its corresponding TRAU Abis interface anti-error code switch opens by the trau frame in-band signalling; TRAU gives tacit consent to anti-error code switch and closes, whether BTS opens by the anti-error code switch of trau frame in-band signalling notice TRAUAbis interface, if the anti-error code switch opens of website Abis interface is then by the anti-error code switch opens of trau frame in-band signalling notice TRAU Abis interface; Certainly, in other embodiments, TRAU gives tacit consent to anti-error code on off state also can be for opening.Have only anti-error code switch of website Abis interface and the anti-error code switch of TRAU Abis interface all to open, could start follow-up expansion transmission bandwidth and increase the mechanism for correcting errors step.
S403, when the anti-error code switch opens of website, then for all adopt the user of half-rate speech conversation under this website, transmission bandwidth between BTS and the TRAU is expanded to 16Kbps by 8Kbps, adopt the frame alignement pattern of similar full rate AMR business to transmit the data of voice under the half rate;
S404, after the transmission bandwidth between BTS and the TRAU is expanded to 16KBbps simultaneously, increase mechanism for correcting errors in the trau frame between TRAU and BTS.Mechanism for correcting errors between TRAU and the BTS is as follows:
1) after the bandwidth between TRAU and the BTS expands to 16Kbps by 8Kbps,, selects the great data of voice quality impacts are protected because the restriction of bandwidth can't increase error correction to all business datums.Certainly; those skilled in the art's the method according to this invention; if bandwidth is further widened; can select increases error correction to more business datum or all business datums; this variation does not exceed protection scope of the present invention, and carrying out logical derivation under method enlightenment of the present invention must draw.In this programme, it is as shown in the table to carry out error correction coding data that handle, important:
| Type | Half rate AMR 7.4Kbps corresponding bit number | |
| Control bit | ||
| 3 | C1 among Fig. 2, C2, C3 | |
| The CRC |
3 | |
| Important speech parameter | 58 | The filter parameter of speech coding, the adaptive codebook index of each subframe are protected |
| Add up to | 64 |
2) the grouping error correction coding/decoding technology of significant bits
At first, 64 above-mentioned significant bits being arranged, is that unit divides into groups with 3 bits.Can be divided into 22 groups altogether.Last 1 group is had only 1 bit, and the back is mended two bits 0 and formed one group.Secondly, take all factors into consideration Abis interface transmission error code model, transmission bandwidth and algorithm complex select suitable error correction coding that error correction coding is carried out in each grouping.The error correction coding that this programme is selected is the gloomy sign indicating number of [7,3,4] Ai Bulang nurse.Its generator polynomial is:
g(x)＝(x+1`)(x
3+x
2+1)
The gloomy sign indicating number of Ai Bulang nurse error correction coding possesses the single bit error error correcting capability, and can detect all unit mistakes, two dislocations and odd number dislocation, and two bursts of the burst mistake of length≤4 and length≤2 are wrong.Adopt the gloomy sign indicating number of [7,3,4] Ai Bulang nurse that 22 groups of significant bits are encoded, every group coding generates 7 bits, and common property is given birth to 154 bits.
Except that synchronization bit, it is as follows that other significant bits is compiled the frame mode:
1) control bit C1～C5 is provided with
As shown in the table, control bit C1～C5 is the type of service sign of current trau frame, and preceding 11 kinds is the existing trau frame type of present gsm system, the 12nd and the 13rd kind be increase newly the band error correction half rate AMR, the band error correction two kinds of frame types of HR;
| Sequence number | C1 | C2 | C3 | C4 | C5 | |
| 1 | 0 | 0 | 0 | 1 | 0 | FR (up) |
| 2 | 1 | 1 | 1 | 0 | 0 | FR (descending) |
| 3 | 1 | 1 | 0 | 1 | 0 | EFR |
| 4 | 0 | 0 | 1 | 1 | 0 | |
| 5 | 0 | 0 | 1 | 0 | 1 | Operation and Maintenance (up) |
| 6 | 1 | 1 | 0 | 1 | 1 | Operation and Maintenance (descending) |
| 7 | 0 | 1 | 0 | 0 | 0 | Full rate data service (up) |
| 8 | 1 | 0 | 1 | 1 | 0 | Full rate data service (descending) |
| 9 | 1 | 1 | 1 | 1 | 1 | Enhanced data rates for |
| 10 | 1 | 0 | 0 | 0 | 0 | Idle frame (up) |
| 11 | 0 | 1 | 1 | 1 | 0 | Idle frame (descending) |
| 12 | 0 | 0 | 1 | 1 | 1 | The half rate AMR of |
| 13 | 0 | 1 | 1 | 1 | 1 | The HR of band error correction |
2) control bit C6～C25 is provided with
For the half rate AMR trau frame of band error correction, the method to set up of C6～C25 is identical with full rate AMR business.
3) data bit setting
Adopt the gloomy sign indicating number of [7,3,4] Ai Bulang nurse that 22 groups of (64 bits) significant bits coding common properties are given birth to 154 bits.These bits are filled in D1 in the following table～D154 position.
In addition, also have 87 bits (being 151-64) to handle, it is filled in D155～D241 position without above-mentioned error correction coding.
Does not use D242～D256 position, and acquiescence fills out 1.As shown in the table, be exactly spread bandwidth after, handle and without all data to be transmitted structures of mechanism for correcting errors through mechanism for correcting errors.
For the half rate AMR business and the HR business of other speed, also can adopt similar method to fill.These fill methods are applied in the business of different rates, are not exceed protection scope of the present invention.
Certainly, in practice, can also select: other coded system such as cyclic code, Hamming code.For the those skilled in the art, this coded system variation itself does not exceed protection scope of the present invention, and carrying out logical derivation under method enlightenment of the present invention must draw, and has all constituted the replacement that is equal to embodiments of the invention;
The trau frame form of S405, the similar full rate AMR business of employing gsm system transmits above-mentioned half-rate speech data and other the half-rate speech data of handling through mechanism for correcting errors of handling without mechanism for correcting errors.The structure distribution of the trau frame of this moment is shown in the form after the process mechanism for correcting errors in the step 403 is handled, and this trau frame is made up of 320 bits altogether, and every 20ms receives a frame.Grey color part is the synchronization bit of trau frame in the table, has 37 0,1 forms.Because of the synchronization bit number than original increase many, reduced pseudo-synchronous possibility.Even partial data bit wherein (non-grey color part) is because of transmission error code changes, because the synchronization bit data volume is big, the change of partial data bit is difficult to meet synchronous requirement, has avoided the appearance of pseudo-synchronia.Based on same reason, because of transmission error code or switch cause step-out after, according to 37 synchronization bits, also can find correct synchronous head fast, recover synchronously.
Utilize present embodiment, realized providing the website of high-quality speech service for needs, after will expanding transmission bandwidth through the business datum of described website, increase mechanism for correcting errors and handle significant data, reduced pseudo-synchronous possibility, reduced speech damage, improved quality through all voice services of the transmission of website thus.
If when having higher requirements for voice quality at the user who has, in BSC, increase the anti-error code switch configuration of user, selection is opened the anti-error code function of Abis interface to specific user, has just obtained the 3rd embodiment of the method for enhancing voice quality provided by the invention, comprises step:
S501, when certain user has higher requirements to voice quality, revise the BSC data configuration, this user is opened the anti-error code switch of user's Abis interface, and the BTS that notifies described user data to pass through by call signaling;
S502, described BTS receive behind the described call signaling with, notify its corresponding TRAU Abis interface anti-error code switch opens by the trau frame in-band signalling; TRAU gives tacit consent to anti-error code switch and closes, whether BTS opens by the anti-error code switch of trau frame in-band signalling notice TRAU Abis interface, if the anti-error code switch opens of user's Abis interface is then by the anti-error code switch opens of trau frame in-band signalling notice TRAU Abis interface;
S503, when the anti-error code switch opens of user, when then adopting the half-rate speech conversation for this user.BTS and TRAU carry out anti-error code to this user's transmission data to be handled, transmission bandwidth between BTS and the TRAU is expanded to 16Kbps by 8Kbps, adopt the frame alignement pattern of similar full rate AMR business to transmit the data of voice under the half rate, increase mechanism for correcting errors in the trau frame between TRAU and BTS simultaneously; In full accord in the step 403 among a mechanism for correcting errors between TRAU and the BTS and the last embodiment, this does not give unnecessary details;
The trau frame form of S504, the similar full rate AMR business of employing gsm system transmits above-mentioned half-rate speech data and other the half-rate speech data of handling through mechanism for correcting errors of handling without mechanism for correcting errors.The structure distribution of the trau frame of this moment is shown in the form after the process mechanism for correcting errors in the step 403 is handled, and this trau frame is made up of 320 bits altogether, and every 20ms receives a frame.Grey color part is the synchronization bit of trau frame in the table, has 37 0,1 forms.Because of the synchronization bit number than original increase many, reduced pseudo-synchronous possibility.Even partial data bit wherein (non-grey color part) is because of transmission error code changes, because the synchronization bit data volume is big, the change of partial data bit is difficult to meet synchronous requirement, has avoided the appearance of pseudo-synchronia.Based on same reason, because of transmission error code or switch cause step-out after, according to 37 synchronization bits, also can find correct synchronous head fast, recover synchronously.
In practice, the anti-error code switch of website Abis interface among an anti-error code switch of the user's Abis interface in the present embodiment and the last embodiment can be provided with simultaneously, also can select to be provided with.When only be provided with the two one of the time, handle according to preceding two embodiment; When selecting to open simultaneously above-mentioned two switches, these two functions are handled simultaneously, just: on the one hand, for through all related service data of website thus, the expansion transmission bandwidth, and increase mechanism for correcting errors and handle; On the other hand, for the website of all related service data processes of this user, the expansion transmission bandwidth, and increase mechanism for correcting errors and handle.This is the justice that should have of the utilization embodiment of the invention, does not exceed protection scope of the present invention.
Utilize present embodiment, realized providing the user of high-quality speech service for needs, to it behind business datum expansion transmission bandwidth, by increasing the transfer check mechanism between TRAU and the BTS, and adopt similar full rate trau frame synchronous form to transmit half rate speech frame, the frame losing that the factors such as transmission error code, switching that effectively solve cause, wrong frame, pseudo-synchronization frame improve the speech quality of half-rate speech to the damage of voice quality.And, according to the needs of practice and the situation of transmission conditions, by increasing anti-error code switch of website Abis interface and the anti-error code switch of user, perhaps be chosen in the website of Abis interface microwave transmission, the perhaps high-end user that voice quality is had higher requirements, open this function, can effectively realize the equilibrium between power system capacity and the speech quality.
And, by above-mentioned two embodiment, overcome the pseudo-synchronous very high technical problem of probability of appearance under half-rate speech encoding and decoding situation.This is owing to synchronization bit in the half-rate speech encoding and decoding is considerably less, and under transmission error code or switch instances, it is very high pseudo-synchronous probability to occur.And half-rate speech encoding and decoding compression ratio height, if wrong frame, frame losing, pseudo-synchronization frame are very high to the destructiveness of voice quality.The anti-transmission error code ability of half-rate TRAU frame of the prior art, when causing having error code or switching generation, voice quality descends obviously.According to measuring and calculating, a pseudo-synchronization frame will be to 0.05～0.3 minute influence of voice quality MOS branch (MeanOpinion Score, mean opinion score) generation.(full marks that MOS divides are 5 minutes, and score is high more, and voice quality is made an appointment).And in above-mentioned two embodiment, because the synchronization bit data volume is big, pseudo-synchronous probability occurring reduces greatly, has ensured voice quality well.
As shown in Figure 5, be first embodiment of the base station of enhancing voice quality of the present invention, comprising:
Transmission bandwidth expanding element 501 is used for: the transmission bandwidth between expansion BTS and the BSC;
TRAU transmits error correction unit 502, is used for: the trau frame between TRAU and described BTS increases mechanism for correcting errors.
By the above embodiment of the present invention, the transmission bandwidth by between expansion BTS and the BSC increases mechanism for correcting errors in the trau frame between TRAU and BTS, can reduce the error rate of transfer of data, promotes voice communication quality.
Wherein, in the above-described embodiments, the data between described BTS and the described BSC can be the half rate encoded forms.
Wherein, in the above-described embodiments,, can also comprise in order to indicate transmission bandwidth expanding element and the work of mechanism for correcting errors coding unit by switch:
Anti-error code switch, described anti-error code switch is anti-error code switch of website or the anti-error code switch of user, be used for: open or close default anti-error code switch and send opening signal, described opening signal is used to indicate described transmission bandwidth expanding element and the work of described TRAU transmission error correction unit.
Wherein, in the above-described embodiments, when the transmission error rates that adopts microwave transmission or other reasons to cause between BTS and BSC is higher,, can also comprise in order to improve transmission quality:
The transmission error code inspection unit, be used for: if adopt microwave transmission between described BTS and the described BSC, or have transmission error code between described BTS and the described BSC, and then generating enabled instruction, described enabled instruction is used to indicate described transmission bandwidth expanding element and the work of described TRAU transmission error correction unit.
Wherein, in the above-described embodiments, if the described anti-error code switch of opening is the anti-error code switch of described website, then
Described transmission bandwidth expanding element expands to 16Kbps with the described BTS of described website and the transmission bandwidth between the described BSC by 8Kbps;
Increase mechanism for correcting errors in the trau frame of described TRAU transmission error correction unit between described TRAU and described BTS.
Wherein, in the above-described embodiments, if the described anti-error code switch of opening is the anti-error code switch of described user, then
Described transmission bandwidth expanding element expands to 16Kbps with the described BTS of all websites of described user data process and the transmission bandwidth between the described BSC by 8Kbps;
Described TRAU transmission error correction unit increases mechanism for correcting errors in the described TRAU of all websites of described user data process and the trau frame between the described BTS.
At existing half rate transmission means, when the anti-error code switch opens of the anti-error code switch of website or user, transmission bandwidth is expanded to 16Kbps, and corresponding increase mechanism for correcting errors, reduced the speech damage that causes because of transmission error code effectively.
Wherein, in the above-described embodiments, described TRAU transmission error correction unit is specially:
The error correction coding/decoding subelement is used for: to the business datum error correction coding/decoding that divides into groups.
Wherein, in the above-described embodiments, described business datum is specially:
Control bit, CRC check bit or speech parameter.
Wherein, in the above-described embodiments, what described grouping error correction coding/decoding adopted is:
The gloomy sign indicating number of Ai Bulang, cyclic code or Hamming code.
Utilize the gloomy sign indicating number of Ai Bulang or other decoding methods to important business datum, carry out transmitting after the error correction coding as control bit, CRC check bit or important speech parameter, can reduce pseudo-synchronous probability, reduce the speech damage that transmission error code causes, promote voice quality.
As shown in Figure 6, be to utilize BTS602 and TRAU601 among the present invention to speech parameter error correction coding/decoding process schematic diagram.Said process is applicable to that also control bit, CRC check bit and other need carry out the business datum of error correction coding/decoding.Anti-error code switch of website and the anti-error code switch of user be in the BTS side, certainly in the embodiment that has, can comprise and state a kind of in two kinds of anti-error code switches.
Being of wide application of method and apparatus of the present invention, for fields such as landline telephone and other relevant data transmission, also can adopt selectable expansion transmission bandwidth, increase the method for mechanism for correcting errors then, ensure correct transmission, promote the quality of data transmission service for important information.Also can be applied to the full-speed voice coding and wait other modes, concrete technique effect depends on the concrete environment of applications of technical scheme institute.For the those skilled in the art, these variations do not exceed protection scope of the present invention.
Through the above description of the embodiments, the those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium, comprise that some instructions are with so that a computer equipment (can be a personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
Above-described embodiment of the present invention does not constitute the qualification to protection range of the present invention.Any modification of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1. a method that strengthens voice quality is characterized in that, comprises step:
Open default anti-error code switch, described anti-error code switch is the anti-error code switch of website;
For all adopt the user of half-rate speech conversation under this website, expand the base transceiver station BTS of described website and the transmission bandwidth between the base station controller BSC, adopt the frame alignement pattern of similar full rate adaptive multi-rate speech encoding and decoding AMR business to transmit the data of voice under the half rate, and in the rate adapted code conversion unit TRAU of described website and the trau frame between the BTS, increase mechanism for correcting errors.
2. the method for enhancing voice quality as claimed in claim 1 is characterized in that, if adopt microwave transmission between described BTS and the described BSC, or has transmission error code between described BTS and the described BSC, then opens the anti-error code switch of predetermined described website;
Described BTS notifies its corresponding TRAU Abis interface anti-error code switch opens by the trau frame in-band signalling.
3. the method for enhancing voice quality as claimed in claim 1 is characterized in that, described mechanism for correcting errors is specially:
To the business datum error correction coding/decoding that divides into groups.
4. the method for enhancing voice quality as claimed in claim 3 is characterized in that, describedly to the divide into groups described business datum of error correction coding/decoding of business datum is:
Control bit, CRC check bit or speech parameter.
5. as the method for claim 3 or 4 described enhancing voice qualities, it is characterized in that described grouping error correction coding/decoding is specially:
Use the gloomy sign indicating number of Ai Bulang, cyclic code or the Hamming code error correction coding/decoding that divides into groups.
6. a method that strengthens voice quality is characterized in that, comprises step:
Open default anti-error code switch, described anti-error code switch is the anti-error code switch of user;
When adopting the half-rate speech conversation for the user, expand in this user data transmission all base transceiver station BTS of process and the transmission bandwidth between the base station controller BSC, adopt the frame alignement pattern of similar full rate adaptive multi-rate speech encoding and decoding AMR business to transmit the data of voice under the half rate, and in the rate adapted code conversion unit TRAU of all websites of described user data process and the trau frame between the BTS, increase mechanism for correcting errors.
7. the method for enhancing voice quality as claimed in claim 6 is characterized in that,
The BTS that notifies described user data to pass through by call signaling;
Described BTS notifies its corresponding TRAU Abis interface anti-error code switch opens by the trau frame in-band signalling.
8. the method for enhancing voice quality as claimed in claim 6 is characterized in that, described mechanism for correcting errors is specially:
To the business datum error correction coding/decoding that divides into groups.
9. the method for enhancing voice quality as claimed in claim 8 is characterized in that, describedly to the divide into groups described business datum of error correction coding/decoding of business datum is:
Control bit, CRC check bit or speech parameter.
10. strengthen the method for voice quality as claimed in claim 8 or 9, it is characterized in that, described grouping error correction coding/decoding is specially:
Use the gloomy sign indicating number of Ai Bulang, cyclic code or the Hamming code error correction coding/decoding that divides into groups.
11. a base station that strengthens voice quality is characterized in that, comprising:
Anti-error code switch, described anti-error code switch is anti-error code switch of website or the anti-error code switch of user, be used for: open or close default anti-error code switch and send opening signal, described opening signal is used to indicate transmission bandwidth expanding element and the work of rate adapted code conversion unit TRAU transmission error correction unit;
The transmission bandwidth expanding element, be used for: if the anti-error code switch opens of website, then for all adopt the user of half-rate speech conversation under this website, expand the base transceiver station BTS of described website and the transmission bandwidth between the base station controller BSC, adopt the frame alignement pattern of similar full rate adaptive multi-rate speech encoding and decoding AMR business to transmit the data of voice under the half rate; Perhaps, if the anti-error code switch opens of user, when then adopting the half-rate speech conversation for this user, expand in this user data transmission all described BTS of process and the transmission bandwidth between the described BSC, adopt the frame alignement pattern of similar full rate AMR business to transmit the data of voice under the half rate;
TRAU transmits error correction unit, is used for: if the described anti-error code switch of opening is the anti-error code switch of described website, then increase mechanism for correcting errors in the TRAU of described website and the trau frame between the described BTS; If the described anti-error code switch of opening is the anti-error code switch of described user, then in the TRAU of all websites of described user data process and the trau frame between the BTS, increase mechanism for correcting errors.
12. the base station of enhancing voice quality as claimed in claim 11 is characterized in that, also comprises:
The transmission error code inspection unit, be used for: if adopt microwave transmission between described BTS and the described BSC, or have transmission error code between described BTS and the described BSC, and then generating enabled instruction, described enabled instruction is used to indicate described transmission bandwidth expanding element and the work of described TRAU transmission error correction unit.
13. the base station of enhancing voice quality as claimed in claim 11 is characterized in that, described TRAU transmission error correction unit is specially:
The error correction coding/decoding subelement is used for: to the business datum error correction coding/decoding that divides into groups.
14. the base station of enhancing voice quality as claimed in claim 13 is characterized in that, described business datum is specially:
Control bit, CRC check bit or speech parameter.
15. the base station as claim 13 or 14 described enhancing voice qualities is characterized in that, what described grouping error correction coding/decoding adopted is:
The gloomy sign indicating number of Ai Bulang, cyclic code or Hamming code.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100477491A CN101159442B (en) | 2007-10-30 | 2007-10-30 | Method and base station of enhancing voice quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100477491A CN101159442B (en) | 2007-10-30 | 2007-10-30 | Method and base station of enhancing voice quality |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101159442A CN101159442A (en) | 2008-04-09 |
| CN101159442B true CN101159442B (en) | 2011-11-16 |
Family
ID=39307396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100477491A Expired - Fee Related CN101159442B (en) | 2007-10-30 | 2007-10-30 | Method and base station of enhancing voice quality |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101159442B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101729950B (en) * | 2008-10-16 | 2012-10-03 | 中兴通讯股份有限公司 | Implementation method for improving circuit quality of Integrated Services Digital Network (ISDN) |
| CN102624712B (en) * | 2012-02-28 | 2015-03-25 | 大唐移动通信设备有限公司 | Method for optimizing quality of service of wireless streaming media and device |
| CN106027541A (en) * | 2016-06-17 | 2016-10-12 | 北京世纪东方通讯设备有限公司 | Voice coding and decoding device and method used for GSM-R communication system |
-
2007
- 2007-10-30 CN CN2007100477491A patent/CN101159442B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101159442A (en) | 2008-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101422061B (en) | Method for radio resource control requested codec rate control for voip | |
| CN100583691C (en) | Synchronization method and system for transmitting voice data in a mobile communication system | |
| US20050286536A1 (en) | Reducing backhaul bandwidth | |
| CN101213802A (en) | Method and apparatus for controlling rate of voice service in a mobile communication system supporting voice service via packet network | |
| CN1276134A (en) | Mobile communications system and transcoder unit | |
| CN1991977B (en) | Voice coding rate confirming method for radio communication | |
| CN101001403A (en) | Expansing codeless conversion operation in system of personal mobile phone | |
| CN101335764B (en) | Multi-frame synthesizing and parsing method and apparatus, multi-frame processing system | |
| CN101159442B (en) | Method and base station of enhancing voice quality | |
| CN1258890C (en) | Testing loops for channel coder-decorder | |
| CN101572910B (en) | Method for adjusting speech frame phase, base transceiver station and base station sub-system | |
| WO2006111792A2 (en) | System and method for decoding signalling messages on flo hr channels | |
| CN101622711A (en) | Methods, systems, and computer program products for silence insertion descriptor (sid) conversion | |
| JP6320421B2 (en) | Decoding early stop feedback method, apparatus and system | |
| CN1894934B (en) | A method and a device for reporting the number of correctly decoded transport blocks in a wireless system | |
| CN1992559B (en) | Method for dynamic regulating uplink voice rate of terminal | |
| JP4394645B2 (en) | Method and apparatus for reconfiguration in a wireless system | |
| NO323666B1 (en) | Data transfer method | |
| CN1886970A (en) | A method and a device for reallocating transport format combination identifiers in a wireless system | |
| CN102790997B (en) | Method and device for transmission of adaptive multi-rate (AMR) voice data | |
| CN101309487B (en) | Voice frame processing method, system and base station | |
| CN103650627B (en) | Voice communication method, apparatus and system | |
| CN101594692B (en) | Method and system for quick calling establishment in IP ABIS | |
| CN101237296B (en) | Coding method and device based on compression transmission interval | |
| CN113691350B (en) | Combined scheduling method and system of eMBB and URLLC |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111116 Termination date: 20131030 |