CN101414895B - Encapsulation transmission method for voice and signaling transmission in wireless channel - Google Patents
Encapsulation transmission method for voice and signaling transmission in wireless channel Download PDFInfo
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- CN101414895B CN101414895B CN2008100798247A CN200810079824A CN101414895B CN 101414895 B CN101414895 B CN 101414895B CN 2008100798247 A CN2008100798247 A CN 2008100798247A CN 200810079824 A CN200810079824 A CN 200810079824A CN 101414895 B CN101414895 B CN 101414895B
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Abstract
The invention discloses a packaging and transmitting method for transmitting voice and signaling in a wireless channel and relates to the technology of constructing a voice communication network by wireless links in the communication field. The method adopts the antecedent correction technology, turns the voice in an E1 channel into a grouped mode by combining to carry out transmission, adds fixed check bits, maps and packages according to the 2048kb/s frame structure in International Telecommunication Union ITU-T G704 so as to ensure the quality performance of the voice when transmitting by the wireless links and achieves reliable transmission of the signals in the wireless channel. The method has the advantages of standard interface, strong error-correcting capability, rapid networking and convenient use, and the like, and is especially suitable for the application of a voice exchange device in constructing an integrated service communication network by an E1 relay link in the wireless transmission channel.
Description
Technical field
The present invention relates to the encapsulation and transmission method of transporting speech and signaling in a kind of wireless channel in the integrated service network network field, particularly suitable speech switching equipment is through the application of E1 repeated link structure integrated service network network under wireless transmission channel.
Background technology
The ITU-T of International Telecommunications Union does not carry out correction process to the data of No.1 signaling; No.7 number signaling has also just been carried out the error detection processing; Be not that loaded information is carried out error protection to signaling and speech, this technology is applicable to transmission channel preferably such as optical fiber, coaxial cable, but is not suitable for the higher wireless transmission channel of the error rate that decline is arranged; In military communication system, transmission channel quality can't be able to guarantee especially.
Summary of the invention
Technical problem to be solved by this invention is to avoid the weak point in the above-mentioned background technology and a kind of G.704 encapsulation and transmission method of transporting speech and signaling in the wireless channel of frame structure of the ITU-T of International Telecommunications Union that adopts is provided.The present invention also adopts the standard speed interface of the 2048kb/s of the ITU-TG.703 of International Telecommunications Union suggestion, is convenient to utilize existing radio transmission apparatus networking.The product of the inventive method manufacturing has characteristics such as equipment is simple, and networking is rapid, and performance is good, and is easy to use, with low cost.
The objective of the invention is to realize like this, it comprises step:
When 1. the wireless side data are sent according to the G.706 requirement of frame synchronization of the ITU-T of International Telecommunications Union; Wired side data is carried out frame synchronization; Data after the frame synchronization; According to the G.704 requirement of frame structure of the ITU-T of International Telecommunications Union, distinguish unusual frame, even frame, the signaling data and the voice data of preceding 25 tunnel in each frame extracted;
2. the signaling data that extracts and voice data are reassembled into the grouping of one 50 byte; Reed-Solomon RS error correction coding is carried out in the grouping of 50 bytes; The coding back generates the check code of 12 bytes, forms the grouping that 62 bytes contain error correction coding by the grouping of 50 bytes and the check code of 12 bytes;
3. the grouping that 62 bytes is contained error correction coding requires to shine upon encapsulation according to the frame structure of the 2048kb/s interface rate among the ITU-G.704 of International Telecommunications Union and sends;
During 4. for the wireless side Data Receiving, at first according to the ITU-T of International Telecommunications Union G.704 the requirement of frame structure carry out frame structure and delimit, frame structure is distinguished strange frame, even frame after delimiting, and extracts 62 bytes as a grouping according to per 2 frames;
5. after frame structure is delimited successfully, Reed-Solomon RS error correction decoding is carried out in the grouping of 62 bytes, no matter to mistake, 62 byte packet are sent to wired side buffering area handle behind the error correction decoding;
6. 62 byte packet after wired side buffering area being handled; According to the G.704 requirement of frame structure of the ITU-T of International Telecommunications Union, the order when receiving the signaling data in preceding 50 bytes of 62 byte packet and voice data according to wired side data is put back in the time slot of former E1 frame structure and goes;
The encapsulated delivery of transporting speech and signaling in the completion wireless channel.
The present invention compares with background technology, has following advantage:
(1) encapsulation and transmission method that proposes among the present invention compares with the processing of data and signaling not being carried out error protection that the ITU-T of International Telecommunications Union proposes, and guaranteed that signaling carries out the special applications of reliable transmission through the wireless channel of the high bit error that declines.
(2) the present invention adopts the standard speed interface of the 2048kb/s that G.703 ITU-T of International Telecommunications Union advise, is convenient to utilize existing radio transmission apparatus networking.The product that the inventive method is made, characteristics such as it is simple to have equipment, and networking is rapid, and performance is good, and is easy to use, with low cost.
Description of drawings
Fig. 1 is the electric functional-block diagram of the wired side signal of the present invention to wireless side inter-process embodiment.
Fig. 2 is the electric functional-block diagram of wireless side signal of the present invention to wired side inter-process embodiment.
Fig. 3 is the mapping relations figure of wireless side signal of the present invention and wired side signal map relation.
Among Fig. 1,1 is anti-fading frame synchronization module, and 2 is the data processing buffer module, and 3 is RS (62,50) coding module, and 4 is the data processing buffer module, and 5 is E1 frame generation module.
Among Fig. 2,6 is anti-fading frame synchronization module, and 7 is the data processing buffer module, and 8 is RS (62,50) decoder module, and 9 is the data processing buffer module, and 10 is E1 frame generation module.
Embodiment
Referring to figs. 1 through Fig. 3.Fig. 1 is the electric functional-block diagram of the wired side signal of the present invention to wireless side inter-process embodiment, and it comprises anti-fading frame synchronization module 1, data processing buffer module 2, RS (62,50) coding module 3, data processing buffer module 4, E1 frame generation module 5.At first anti-fading frame synchronization module 1 is according to the G.706 requirement of frame synchronization of the ITU-T of International Telecommunications Union; Wired side data is carried out frame synchronization, and the data after synchronously are according to the structural requirement of ITU-TG.704 frame; Distinguish parity frame; Preceding 25 tunnel data (comprising signaling and speech) in each frame are extracted, deposit data processing buffer module 2 in, with the grouping that is reassembled into one 50 byte through RS (62; 50) coding module 3 carries out RS (62; 50) error correction coding, the data after the error correction coding are again through data processing buffer module 4 bufferings, and the data after the buffering are shone upon encapsulation through E1 frame generation module 5 according to the frame structure requirement of the 2048kb/s interface rate of the ITU-G.704 of International Telecommunications Union suggestion regulation and sent;
Fig. 2 is the electric functional-block diagram of wireless side signal of the present invention to wired side inter-process embodiment.It comprises anti-fading frame synchronization module 6, data processing buffer module 7, RS (62,50) decoder module 8, data processing buffer module 9, E1 frame generation module 10.During for the wireless side Data Receiving; At first anti-fading frame synchronization module 6 is carried out frame synchronization according to the requirement of the ITU-TG.706 of International Telecommunications Union frame synchronization to the wireless side data, and according to G.704 frame structure requirement carrying out frame structure demarcation of the ITU-T of International Telecommunications Union; After frame structure is delimited; Distinguish parity frame, handle through data processing buffer module 7, the data after data processing buffer module 7 is handled are extracted 62 bytes according to per 2 frames and are passed through RS (62 as a grouping; 50) decoder module 8 carries out RS (62; 50) error correction decoding, decoded data are handled through data processing buffer module 9 again, and the order the when signaling data in preceding 50 bytes of 62 byte packet and voice data are received according to wired side data is put back in the time slot of former E1 frame structure and goes.
The present invention includes step:
1. according to the G.706 requirement of frame synchronization of the ITU-T of International Telecommunications Union; Wired side data is carried out frame synchronization; Data after the frame synchronization according to the G.704 requirement of frame structure of the ITU-T of International Telecommunications Union, are distinguished unusual frame, even frame; Preceding 25 tunnel signaling data and voice data in the strange frame of distinguishing, the even frame are extracted, and embodiment is accomplished by the anti-fading frame synchronization module among Fig. 11; Wired side data frame structure is shown in the wired side E1 frame structure among Fig. 3.
2. the signaling data that extracts and voice data are reassembled into the grouping of one 50 byte, embodiment is accomplished by the data processing buffer module among Fig. 12.
Reed-Suo Luo is carried out in the grouping of 50 bytes cover the RS error correction coding, embodiment is accomplished by the R-S among Fig. 1 (62,50) coding module 3.
The coding back generates the check code of 12 bytes, forms the grouping that 62 bytes contain error correction coding by the grouping of 50 bytes and the check code of 12 bytes, and embodiment is accomplished by the data processing buffer module among Fig. 14.
3. the grouping that 62 bytes is contained error correction coding requires to shine upon encapsulation according to the frame structure of the 2048kb/s interface rate among the ITU-G.704 of International Telecommunications Union and sends, and embodiment is accomplished by the E1 frame generation module among Fig. 15; The wireless side data frame structure is shown in the wireless side E1 frame structure among Fig. 3.
During 4. for the wireless side Data Receiving, at first according to the ITU-T of International Telecommunications Union G.704 the requirement of frame structure carry out frame structure and delimit, frame structure is distinguished strange frame, even frame after delimiting, embodiment is accomplished by the anti-fading frame synchronization module among Fig. 26; The wireless side data frame structure is shown in the wireless side E1 frame structure among Fig. 3.
Strange frame, even frame are extracted 62 bytes as a grouping, and embodiment is accomplished by the data processing buffer module among Fig. 27
5. after frame structure is delimited successfully, Reed-Suo Luo is carried out in the grouping of 62 bytes cover the RS error correction decoding, embodiment is accomplished by the R-S among Fig. 2 (62,50) decoder module 8.
No matter to mistake, 62 byte packet are sent to wired side buffering area handle behind the error correction decoding, embodiment is accomplished by the data processing buffer module among Fig. 29.
6. 62 byte packet after wired side buffering area being handled; According to the G.704 requirement of frame structure of the ITU-T of International Telecommunications Union; Order when receiving the signaling data in preceding 50 bytes of 62 byte packet and voice data according to wired side data is put back in the time slot of former E1 frame structure and goes, and embodiment is accomplished by the E1 frame generation module among Fig. 2 10; Wired side data frame structure is shown in the wired side E1 frame structure among Fig. 3.
Fig. 3 is the mapping relations figure of wireless side signal of the present invention and wired side signal map relation.
Claims (1)
1. the encapsulation and transmission method of transporting speech and signaling in the wireless channel is characterized in that comprising step:
When 1. the wireless side data are sent according to the G.706 requirement of frame synchronization of the ITU-T of International Telecommunications Union; Wired side data is carried out frame synchronization; Data after the frame synchronization; According to the G.704 requirement of frame structure of the ITU-T of International Telecommunications Union, distinguish unusual frame, even frame, the signaling data and the voice data of preceding 25 tunnel in each frame extracted;
2. the signaling data that extracts and voice data are reassembled into the grouping of one 50 byte; Reed-Solomon RS error correction coding is carried out in the grouping of 50 bytes; The coding back generates the check code of 12 bytes, forms the grouping that 62 bytes contain error correction coding by the grouping of 50 bytes and the check code of 12 bytes;
3. the grouping that 62 bytes is contained error correction coding requires to shine upon encapsulation according to the frame structure of the 2048kb/s interface rate among the ITU-G.704 of International Telecommunications Union and sends;
During 4. for the wireless side Data Receiving, at first according to the ITU-T of International Telecommunications Union G.704 the requirement of frame structure carry out frame structure and delimit, frame structure is distinguished strange frame, even frame after delimiting, and extracts 62 bytes as a grouping according to per 2 frames;
5. after frame structure is delimited successfully, Reed-Solomon RS error correction decoding is carried out in the grouping of 62 bytes, no matter to mistake, 62 byte packet are sent to wired side buffering area handle behind the error correction decoding;
6. 62 byte packet after wired side buffering area being handled; According to the G.704 requirement of frame structure of the ITU-T of International Telecommunications Union, the order when receiving the signaling data in preceding 50 bytes of 62 byte packet and voice data according to wired side data is put back in the time slot of former E1 frame structure and goes;
The encapsulated delivery of transporting speech and signaling in the completion wireless channel.
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| WO2003040920A1 (en) * | 2001-11-05 | 2003-05-15 | Nokia Corporation | Partially filling block interleaver for a communication system |
| CN101180895A (en) * | 2005-08-22 | 2008-05-14 | 中兴通讯股份有限公司 | Method for transmitting group dedicated signaling using data interface in group communication |
| EP1928116A2 (en) * | 2006-11-28 | 2008-06-04 | Raysat, Inc. | Broadcasting of digital video to mobile terminals |
| CN101299832A (en) * | 2008-06-20 | 2008-11-05 | 华为技术有限公司 | Method, system and equipment for interface data transmission between base station and controller |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003040920A1 (en) * | 2001-11-05 | 2003-05-15 | Nokia Corporation | Partially filling block interleaver for a communication system |
| CN101180895A (en) * | 2005-08-22 | 2008-05-14 | 中兴通讯股份有限公司 | Method for transmitting group dedicated signaling using data interface in group communication |
| EP1928116A2 (en) * | 2006-11-28 | 2008-06-04 | Raysat, Inc. | Broadcasting of digital video to mobile terminals |
| CN101299832A (en) * | 2008-06-20 | 2008-11-05 | 华为技术有限公司 | Method, system and equipment for interface data transmission between base station and controller |
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