CN101026764A - Multimedia communication method and system - Google Patents
Multimedia communication method and system Download PDFInfo
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- CN101026764A CN101026764A CN 200610058207 CN200610058207A CN101026764A CN 101026764 A CN101026764 A CN 101026764A CN 200610058207 CN200610058207 CN 200610058207 CN 200610058207 A CN200610058207 A CN 200610058207A CN 101026764 A CN101026764 A CN 101026764A
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Abstract
The invention also discloses multimedia communication system (MCS) at transmitting end, and MCS at receiving end. Both of the method and system support following procedures: the transmitting end maps data from different sources to different time slices; multiplexing time slices to form super frame; adding control signaling to data carried by each time slice in formed super frame; transmitting out modulated super frame with control signaling being added. Demodulating super frame from the transmitting end, the receiving end can obtain control signaling contained in time slice directly after parsing process. Both of the method and system can shorten time of identifying own needed information source by multimedia data receiving end effectively. The invention raises users' satisfaction degree.
Description
Technical field
The present invention relates to wireless communication field, be specifically related to a kind of multimedia communication method and system.
Background technology
Along with development of Communication Technique, multimedia communication is popularized just gradually, the user can use subscriber equipment (UE) and multimedia communications system to carry out data communication, with the increasing multimedia service of acceptance from multimedia communications system, as: comprise the mobile video broadcast service of mobile digital TV business etc.
At above-mentioned multimedia services such as mobile digital TV business, when multimedia communications system is communicated by letter with UE, transmitting terminal as multi-medium data, multimedia communications system adds corresponding signaling content respectively at the multi-medium data of various information source, again the multi-medium data that adds the signaling content is carried out processing such as multiplexing, scrambling, coding, framing, modulation, will handle afterwards formed physical frame and launch.At least comprise the information source sign in the described signaling content, with the information source under the pairing multi-medium data of sign signaling content.
As the receiving terminal of multi-medium data, UE receives the physical frame from multimedia communications system.Certainly, in all physical frames of receiving, UE only needs the wherein physical frame of a certain information source usually; Here said a certain information source then depends on user's selection, as: the user is using UE to watch the TV programme of certain television channel, UE determines that then this television channel is its required information source, and the physical frame from this information source is handled, and does not handle the physical frame from other information source.
UE just need obtain the information source sign that is comprised in the physical frame of receiving in order to discern its required information source, and judges whether the information source of obtaining identifies pairing information source is the required information source of UE.Yet, because the signaling content and the multi-medium data that are comprised in the physical frame are to combine in the mode of statistic multiplexing, so UE can't directly parse the information source sign that the signaling content is comprised from the physical frame of receiving, but after needing earlier to carry out handling with modulation, coding, scrambling, corresponding demodulation, decoding, descrambling, demultiplexing etc. such as multiplexing to the physical frame of receiving, could from the data of finishing processing, parse the information source sign that the signaling content is comprised, and then determine according to the information source sign that parses whether this information source is the required information source of UE.
As seen, UE is in order to determine self required physical frame in the physical frame of receiving, need earlier the physical frame of receiving to be carried out physical layer process such as demodulation, decoding, descrambling, demultiplexing, this handles the time that can obviously prolong the required information source of UE identification self, and reduces user satisfaction.Such as: at present, the user uses UE when a television channel switches to another television channel, and UE needs 5 to 10 seconds consuming time usually to discern its required new television channel; In these 5 to 10 seconds, the described television channel that the user can't use UE to watch to switch to.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of multimedia communication method, to shorten the time of the required information source of multi-medium data receiving terminal identification self, improves user satisfaction.
Another object of the present invention is to provide a kind of transmitting terminal multimedia communications system and a kind of receiving terminal multimedia communications system,, improve user satisfaction to shorten the time of the required information source of multi-medium data receiving terminal identification self.
Another purpose of the present invention is to provide a kind of multimedia communications system, to shorten the time of the required information source of multi-medium data receiving terminal identification self, improves user satisfaction.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention discloses a kind of multimedia communication method, this method comprises:
A. transmitting terminal is mapped to the data of various information source respectively on the different timeslices, all timeslices are carried out multiplexing back form superframe, and in the superframe that forms, add the control signaling at each timeslice institute data carried by data, again the superframe that adds the control signaling is carried out launching after the modulation treatment;
B. after receiving terminal carries out demodulation process to the superframe from transmitting terminal, the control signaling that comprises in the timeslice of direct dissection process gained, and according to the definite timeslice that will receive of the control signaling of resolving gained.
Among the step a, comprise information source sign, timeslice temporal information in the described control signaling at least;
And the control signaling takies one group of subcarrier in the employed effective subcarrier of physical frame that described timeslice comprises, or takies at least one signaling symbols in the described physical frame.
Among the step a, the method for described adding control signaling is:
Transmitting terminal adds and the corresponding control signaling of this timeslice institute data carried by data in the timeslice that superframe comprised that forms.
Among the step b, determine that the method for described timeslice comprises:
Receiving terminal parses the control signaling from described timeslice, and read the information source sign that the control signaling that parses is comprised, judge whether this information source identifies identical with the information source sign of self required reception information source, if identical, the pairing timeslice of control signaling that receiving terminal determines to comprise this information source sign is the timeslice that will receive; Otherwise the pairing timeslice of control signaling that receiving terminal determines to comprise this information source sign is not the timeslice that will receive.
Among the step a, further in the timeslice that superframe comprised, add the timeslice temporal information and the information source sign of adjacent previous or next timeslice; Perhaps, the timeslice temporal information and the information source sign that in each timeslice that superframe comprised, add other each timeslice;
Then among the step b, receiving terminal further reads the information source sign of described adjacent timeslice or other each timeslice, and judge whether the information source that reads identifies identical with the information source sign of self required information source, if identical, receiving terminal determines that it is the timeslice that will receive that this information source identifies pairing timeslice; Otherwise receiving terminal determines that it is not the timeslice that will receive that this information source identifies pairing timeslice.
During timeslice that receiving terminal has been determined to receive, further read the timeslice temporal information of this timeslice, and in the indicated time range of the timeslice temporal information that reads, receive timeslice from transmitting terminal.
The invention also discloses a kind of transmitting terminal multimedia communications system, this system comprises message-source adapted device, channel encoder, Multiplexing Unit, Signaling Processing Unit, channel modulator, the transmitting terminal radio-frequency module that links to each other successively;
Wherein, the message-source adapted device is used for the data of each information source are carried out segmentation, encapsulation process and sent to channel encoder;
Channel encoder is used for the data of receiving are carried out encoding process and sent to Multiplexing Unit;
Multiplexing Unit is used for the data of receiving are carried out multiplexing, and the formed superframe in multiplexing back is sent to Signaling Processing Unit;
Signaling Processing Unit is used for sending to channel modulator after the superframe of receiving adds control signaling and pilot signal;
Channel modulator is used for the data of receiving are carried out modulation treatment and sent to the transmitting terminal radio-frequency module;
The transmitting terminal radio-frequency module is used for the superframe of receiving is carried out digital-to-analogue conversion and launches.
Comprise the scrambling unit, the code interleaving unit that link to each other successively in the described channel encoder; Channel encoder links to each other with described message-source adapted device by scrambling unit, links to each other with described Multiplexing Unit by the code interleaving unit;
Comprise in the described channel modulator that the planisphere map unit, inverse discrete fourier transform IFFT unit, the protection interval GI that link to each other successively insert the unit, channel modulator links to each other with described Signaling Processing Unit by the planisphere map unit;
Described transmitting terminal radio-frequency module comprises successively digital-to-analogue conversion D/A unit, the transmitting terminal radio frequency unit that links to each other, and the transmitting terminal radio-frequency module inserts the unit by the D/A unit with GI in the described channel modulator and links to each other.
The invention also discloses a kind of receiving terminal multimedia communications system, this system comprises receiving terminal radio-frequency module, channel demodulator, information source identification and demultiplexing unit, channel decoder, the information source player that links to each other successively;
Wherein, the receiving terminal radio-frequency module is used to receive from the superframe of transmitting terminal and carries out analog-to-digital conversion, and the superframe that also will finish conversion sends to channel demodulator;
Channel demodulator is used for the superframe of receiving is carried out demodulation process and sends to information source identification and demultiplexing unit;
Information source identification and demultiplexing unit, be used for parsing the control signaling that comprises the timeslice from the superframe of receiving, determine according to the control signaling of resolving gained which is the timeslice that needs receive, and the superframe of receiving is carried out demultiplexing handle, will determine that also the timeslice institute data carried by data that will receive and finish the demultiplexing processing sends to channel decoder;
Channel decoder is used for the data of receiving are carried out decoding processing and sent to the information source player;
The information source player is used to play the data of receiving.
Described receiving terminal radio-frequency module comprises successively transmitting terminal radio frequency unit, the analog-digital conversion a/d unit that links to each other, and the receiving terminal radio-frequency module links to each other with GI delete cells in the described channel demodulator by the A/D unit;
Comprise continuous successively GI delete cells, discrete Fourier transform (DFT) FFT unit in the described channel demodulator, separate the planisphere map unit, channel demodulator links to each other with described information source identification and demultiplexing unit by separating the planisphere map unit;
Comprise the descrambling unit, the deinterleaving decoding unit that link to each other successively in the described channel decoder; Channel decoder links to each other with described information source player by the descrambling unit, links to each other with described information source identification and demultiplexing unit by the deinterleaving decoding unit.
Further be connected with the information source buffer between described channel decoder and the information source player, the information source buffer is used for carrying out caching process and send to the information source player from the data of channel decoder.
The invention also discloses a kind of multimedia communications system, this system comprises transmitting terminal communicator and receiving terminal communicator, and the transmitting terminal communicator comprises message-source adapted device, channel encoder, Multiplexing Unit, Signaling Processing Unit, channel modulator, the transmitting terminal radio-frequency module that links to each other successively; The receiving terminal communicator comprises receiving terminal radio-frequency module, channel demodulator, information source identification and demultiplexing unit, channel decoder, the information source player that links to each other successively;
Wherein, the message-source adapted device is used for the data of each information source are carried out segmentation, encapsulation process and sent to channel encoder; Channel encoder is used for the data of receiving are carried out encoding process and sent to Multiplexing Unit; Multiplexing Unit is used for the data of receiving are carried out multiplexing, and the formed superframe in multiplexing back is sent to Signaling Processing Unit; Signaling Processing Unit is used for sending to channel modulator after the superframe of receiving adds control signaling and pilot signal; Channel modulator is used for the data of receiving are carried out modulation treatment and sent to the transmitting terminal radio-frequency module; The transmitting terminal radio-frequency module is used for the superframe of receiving is carried out digital-to-analogue conversion and launches;
The receiving terminal radio-frequency module is used to receive from the superframe of transmitting terminal and carries out analog-to-digital conversion, and the superframe that also will finish conversion sends to channel demodulator; Channel demodulator is used for the superframe of receiving is carried out demodulation process and sends to information source identification and demultiplexing unit; Information source identification and demultiplexing unit, be used for parsing the control signaling that comprises the timeslice from the superframe of receiving, determine according to the control signaling of resolving gained which is the timeslice that needs receive, and the superframe of receiving is carried out demultiplexing handle, will determine that also the timeslice institute data carried by data that will receive and finish the demultiplexing processing sends to channel decoder; Channel decoder is used for the data of receiving are carried out decoding processing and sent to the information source player; The information source player is used to play the data of receiving.
Compared with prior art, method and system provided by the present invention, all support transmitting terminal that the data of various information source are mapped to respectively on the different timeslices, all timeslices are carried out multiplexing back form superframe, and in the superframe that forms, add the control signaling at each timeslice institute data carried by data, again the superframe that adds the control signaling is carried out launching after the modulation treatment; And, receiving terminal after the superframe from transmitting terminal is carried out demodulation process, the direct control signaling that comprises in the timeslice of dissection process gained, and determine the timeslice that will receive according to the control signaling of resolving gained.As seen, the inventive method and system all can effectively shorten the time of the required information source of multi-medium data receiving terminal identification self, and can improve user satisfaction.
Description of drawings
Fig. 1 is the multimedia communication method flow chart of a preferred embodiment of the present invention;
Fig. 2 is the structure chart of superframe described in Fig. 1;
Fig. 3 is a kind of structural representation that adds the physical frame of control signaling among Fig. 1;
Fig. 4 is the another kind of structural representation that adds the physical frame of control signaling among Fig. 1;
Fig. 5 is the structure and the principle schematic of multimedia communications system transmitting terminal of the present invention;
Fig. 6 is the structure and the principle schematic of multimedia communications system receiving terminal of the present invention.
Embodiment
Below in conjunction with drawings and the specific embodiments to the detailed description of the invention.
Multimedia communication method provided by the invention comprises: transmitting terminal is mapped to the data of various information source respectively on the different timeslices, all timeslices are carried out multiplexing back form superframe, and in the superframe that forms, add the control signaling at each timeslice institute data carried by data, again the superframe that adds the control signaling is carried out launching after the modulation treatment; After receiving terminal carries out demodulation process to the superframe from transmitting terminal, the control signaling that comprises in the timeslice of direct dissection process gained, and according to the definite timeslice that will receive of the control signaling of resolving gained.
Transmitting terminal multimedia communications system provided by the invention comprises message-source adapted device, channel encoder, Multiplexing Unit, Signaling Processing Unit, channel modulator, the transmitting terminal radio-frequency module that links to each other successively at least.Wherein, the message-source adapted device is used for the data of each information source are carried out segmentation, encapsulation process and sent to channel encoder; Channel encoder is used for the data of receiving are carried out encoding process and sent to Multiplexing Unit; Multiplexing Unit is used for the data of receiving are carried out multiplexing, and the formed superframe in multiplexing back is sent to Signaling Processing Unit; Signaling Processing Unit is used for sending to channel modulator after the superframe of receiving adds control signaling and pilot signal; Channel modulator is used for the data of receiving are carried out modulation treatment and sent to the transmitting terminal radio-frequency module; The transmitting terminal radio-frequency module is used for the superframe of receiving is carried out digital-to-analogue conversion and launches.
Receiving terminal multimedia communications system provided by the invention comprises receiving terminal radio-frequency module, channel demodulator, information source identification and demultiplexing unit, channel decoder, the information source player that links to each other successively at least.Wherein, the receiving terminal radio-frequency module is used to receive from the superframe of transmitting terminal and carries out analog-to-digital conversion, and the superframe that also will finish conversion sends to channel demodulator; Channel demodulator is used for the superframe of receiving is carried out demodulation process and sends to information source identification and demultiplexing unit; Information source identification and demultiplexing unit, be used for parsing the control signaling that comprises the timeslice from the superframe of receiving, determine according to the control signaling of resolving gained which is the timeslice that needs receive, and the superframe of receiving is carried out demultiplexing handle, will determine that also the timeslice institute data carried by data that will receive and finish the demultiplexing processing sends to channel decoder; Channel decoder is used for the data of receiving are carried out decoding processing and sent to the information source player; The information source player is used to play the data of receiving.
Multimedia communications system provided by the invention then includes described transmitting terminal multimedia communications system and receiving terminal multimedia communications system.
Referring to Fig. 1, Fig. 1 is the multimedia communication method flow chart of a preferred embodiment of the present invention, and this flow process may further comprise the steps:
Step 101: be mapped to respectively on the different timeslices as the multimedia communications system of transmitting terminal data, and all timeslices carried out multiplexing to be combined into data carried by data piece by superframe institute with various information source.Concrete operations are: multimedia communications system carries out encapsulation operation to the data of finishing segmentation again with the data flow segmentation of each information source, can use encapsulation format such as MPE-FEC form or TS stream format during encapsulation.Afterwards, the encapsulation of data to each information source carry out scrambling, necessary data processing such as encode, interweave.
Described coding, the processing mode that interweaves can have multiple, as: DVB-T or DVB-H be applied outer to encode, interweave outward, interior coding, in the combined processing mode that interweaves, or LDPC processing mode such as encode+interweave.Have again, can adopt different code rates to encode according to the transfer of data characteristics and the requirement of various information source.
After finishing above-mentioned data processing, the data that multimedia communications system will be finished the various information source of processing are mapped to respectively in the physical frame structure of different time sheet; And the timeslice to all information sources of finishing mapping is carried out time division multiplexing, to be combined into the data block that comprises all information source contents of being carried by superframe.
Step 102: multimedia communications system adds the control corresponding signaling at each information source timeslice institute data carried by data in the superframe that forms.Concrete operations are: multimedia communications system adds and the corresponding control signaling of this timeslice institute data carried by data in the timeslice that superframe comprised that forms.Particularly, owing to each timeslice is made up of at least one physical frame, thereby multimedia communications system adds the control signaling in the positions such as header structure of each physical frame that timeslice comprised.Described control signaling comprises Control Parameter such as physical frame coded system, planisphere mapping mode, frame length, timeslice temporal information, can correctly handle the pairing data of this control information according to the Control Parameter that comprises in the control signaling to guarantee receiving terminal.
Have again, also comprise the information source sign in the control signaling, to show which information source is data carried by data be on the pairing timeslice of this control signaling.Described timeslice temporal information is used to show the pairing time range of timeslice, with guarantee receiving terminal can according to this timeslice temporal information determine should in which time range the time of reception sheet, and in which time range, do not need the time of reception sheet.
Certainly, timeslice temporal information and information source sign can all be set in the control signaling of each physical frame that each timeslice comprised, also timeslice temporal information and information source sign can only be set in the physical frame that each timeslice comprised, can determine the pairing information source of data carried by data on the pairing time range of this timeslice and this timeslice according to the timeslice of receiving as long as guarantee receiving terminal.
Have again, the timeslice temporal information and the information source sign that also can be further add adjacent previous or next timeslice in the control signaling of each timeslice can further be known adjacent pairing time range of previous or next timeslice and the pairing information source of data carried by data when making receiving terminal receive sometime sheet; The timeslice temporal information and the information source sign that perhaps further add other all timeslices in the control signaling of each timeslice can further be known pairing time range of other all timeslices and the pairing information source of data carried by data when making receiving terminal receive sometime sheet.
Described control signaling can be to use commonplace transmission parameter control (TPS) signaling etc. at present.
Step 103: multimedia communications system carries out processing such as at present common insertion pilot signal, modulation, digital-to-analogue conversion (D/A) operation to the superframe that adds the control signaling, and the superframe that will finish processing is launched.Particularly, described modulation treatment generally includes: planisphere mapping, inverse discrete fourier transform (IFFT) operation, insertion protection (GI) operation at interval; The operation of emission superframe is then finished by the transmitting terminal radio frequency unit, and the transmitting terminal radio frequency unit sends superframe with pulse mode usually.Described pilot signal is that multimedia communications system is used the prior art generation.Have, can fill content among the GI, this content is one or more in Cyclic Prefix (CP), 0, the PN sign indicating number.
There is not strict time order and function order between described adding control signaling manipulation and the operation of described insertion pilot signal.The processing mode of described planisphere mapping can be QPSK, 16QAM, 64QAM and the APSK etc. that use at present, and can be at the The data of dissimilar information sources different code rate and planisphere mapping mode.
In actual applications, can determine the data block size of encapsulation according to the data playback speed of information source; Can determine to comprise in the timeslice quantity of frame according to data block size, code rate, the planisphere mapping mode of encapsulation; Can also determine the length of described superframe according to the largest buffered data volume of the playback rate and the receiving terminal of each information source.
Step 104: receive superframe from multimedia communications system as the UE of receiving terminal, after the superframe of receiving carried out analog-to-digital conversion (A/D) operation, demodulation process, the control signaling that comprises in the timeslice of direct dissection process gained, and according to the definite timeslice that will receive of the control signaling of resolving gained.As seen, after UE finishes above-mentioned demodulation process, just can directly read the control signaling in the timeslice that superframe comprised of finishing demodulation, and no longer need after finishing demodulation, further carry out operations such as demultiplexing superframe.Therefore, UE directly reads the control signaling in the timeslice that superframe comprised of finishing demodulation, and determines that according to the control signaling that reads which timeslice in the superframe is the required timeslice of UE.
Particularly, described demodulation process generally includes: the planisphere map operation is operated, separated to deletion GI, discrete Fourier transform (DFT) (FFT).The method of described definite timeslice that will receive is: UE parses the control signaling from the timeslice of receiving that superframe comprised, and read the information source sign that the control signaling that parses is comprised, judge whether this information source identifies identical with the information source sign of self required reception information source, if it is identical, the pairing timeslice of control signaling that UE determines to comprise this information source sign is the required timeslice of UE, data carried by data is the data of the required information source of UE on this timeslice, further, UE reads the timeslice temporal information of this timeslice, and receives the timeslice from multimedia communications system in the indicated time range of this timeslice temporal information; If inequality, UE determines that then data carried by data on the pairing timeslice of control signaling of this information source sign is not the data of the information source that self needs.
Have again, if have the timeslice temporal information and the information source sign of adjacent timeslice or other all timeslices in the control signaling of timeslice, UE also can read the information source sign of this adjacent timeslice or the information source sign of other each timeslice, and judge whether the information source that reads identifies identical with the information source sign of self required information source, if it is identical, UE determines that it is the required timeslice of UE that this information source identifies pairing timeslice, data carried by data is the data of the required information source of UE on this timeslice, further, UE reads the timeslice temporal information of this timeslice, and receives the timeslice from multimedia communications system in the indicated time range of this timeslice temporal information; If inequality, UE determines that then this information source identifies the data that data carried by data on the pairing timeslice is not the information source that self needs.
Afterwards, UE carries out demultiplexing to the superframe of receiving to be handled, and again the timeslice institute data carried by data that self needs and finished demultiplexing to handle is carried out processing such as deinterleaving, decoding and descrambling, decapsulation, will finish the data of processing again and come out by player plays.And,, also before playing, the data of finishing described processing are carried out caching process usually in order to guarantee smooth played data.
In order to guarantee that UE can determine the timeslice that self is required smoothly, need make the corresponding relation between the information source sign of information source that UE knows that the user selects and this information source in advance, as: with the mode of artificial setting with as described in corresponding relation be disposed among the UE, or comprising the broadcast message of described corresponding relation by transmissions such as base stations, UE preserves after receiving this broadcast message.
Certainly, during the required timeslice of the follow-up reception of UE self, usually need carry out processing such as demodulation, demultiplexing, deinterleaving, decoding and descrambling, decapsulation to the timeslice institute data carried by data of receiving, will finish the data of described processing again and come out by player plays.And,, also before playing, the data of finishing described processing are carried out caching process usually in order to guarantee smooth played data.
As seen, because after multimedia communications system is handled through scrambling, encode, interweave etc. the data that will send, just carry out multiplexing and in finishing multiplexing superframe, add controlling signaling, make UE behind reception and the superframe of demodulation from multimedia communications system, can directly read the control signaling in the timeslice that superframe comprised of finishing demodulation, to determine that according to the control signaling that reads which timeslice in the superframe is the required timeslice of UE.Therefore, the time that UE is used to discern self required information source can obviously be shortened, and user satisfaction also can be improved significantly.
The structure of described superframe as shown in Figure 2.Among Fig. 2, the data of each information source are mapped to respectively on the different timeslices, and the length of superframe is T
Mux
In the step 102, the physical frame structure that has added the control signaling can be as shown in Figure 3.Among Fig. 3, the control signaling takies one group of subcarrier in the employed effective subcarrier of physical frame separately, only needs a physical frame just all the elements that comprise in the control signaling can be transmitted and finishes.Certainly, the physical frame structure that has added the control signaling also can be as shown in Figure 4, among Fig. 4, the control signaling takies one or several signaling symbols in the physical frame separately, and needing to use a plurality of physical frames could finish all the elements transmission that comprises in the control signaling.
Have, in Fig. 3 and Fig. 4, pilot signal, data-signal and control signaling take a part of subcarrier in the employed effective subcarrier of physical frame respectively again.
Can carry out smoothly for the operation that guarantees multimedia communications system among Fig. 1, need in multimedia communications system, carry out setting as shown in Figure 5.Among Fig. 5, multimedia communications system comprises that the message-source adapted device 510, scrambling unit 521, code interleaving unit 522, Multiplexing Unit 530, Signaling Processing Unit 540, planisphere map unit 551, IFFT unit 552, the GI that link to each other successively insert unit 553, D/A unit 560, transmitting terminal radio frequency unit 570.Wherein, scrambling unit 521 and code interleaving unit 522 can be arranged in the same physical entity, are called channel encoder 520; Planisphere map unit 551, IFFT unit 552, GI insert unit 553 and can be arranged in the same physical entity, are called channel modulator 550.
Certainly, Multiplexing Unit 530, Signaling Processing Unit 540, D/A unit 560, transmitting terminal radio frequency unit 570 also can be separately set in the different physical entities respectively; Part or all of device wherein can also be arranged in the independent physical entity jointly, or be arranged at jointly in the physical entities such as channel encoder 520, channel modulator 550.Usually D/A unit 560 and transmitting terminal radio frequency unit 570 are arranged in the same physical entity jointly, are called the transmitting terminal radio-frequency module.
Particularly, the data of 510 pairs of each information sources of message-source adapted device are carried out segmentation and encapsulation process, and the data that will finish processing send to the scrambling unit 521 in the channel encoder 520; 521 pairs of data of receiving of scrambling unit carry out sending to code interleaving unit 522 after scrambling is handled; The 522 pairs of data of receiving in code interleaving unit carry out sending to Multiplexing Unit 530 after code interleaving is handled; 530 pairs of data of receiving of Multiplexing Unit are carried out multiplexing, and the superframe that forms is sent to Signaling Processing Unit 540; Signaling Processing Unit 540 adds the planisphere map unit 551 that sends to after control signaling and the pilot signal in the channel modulator 550 in the superframe of receiving; 551 pairs of planisphere map unit receive superframe carry out sending to IFFT unit 552 after the planisphere mapping; The data that comprise in the 552 pairs of superframes of receiving in IFFT unit carry out sending to GI insertion unit 553 after the IFFT operation; GI inserts and sends to D/A unit 560 after the 553 pairs of superframes of receiving in unit insert the GI operation; The 560 pairs of superframes of receiving in D/A unit carry out sending to transmitting terminal radio frequency unit 570 after the digital-to-analogue conversion, and transmitting terminal radio frequency unit 570 is launched the superframe of receiving by antenna.
Can carry out smoothly for the operation that guarantees UE among Fig. 1, need in UE, carry out setting as shown in Figure 6.Among Fig. 6, UE comprises successively the receiving terminal radio frequency unit 610, A/D unit 620, GI delete cells 631, the FFT unit 632 that link to each other, separates planisphere map unit 633, information source identification and demultiplexing unit 640, deinterleaving decoding unit 652, descrambling unit 651, information source buffer 660, information source player 670.
Wherein, GI delete cells 631, FFT unit 632 are conciliate planisphere map unit 633 and can be arranged in the same physical entity, are called channel demodulator 630; Descrambling unit 651 is conciliate trellis decoded unit 652 and can be arranged in the same physical entity, is called channel decoder 650.Certainly, receiving terminal radio frequency unit 610, A/D unit 620, information source identification and demultiplexing unit 640 also can be separately set in the different physical entities respectively; Part or all of device wherein can also be arranged in the independent physical entity jointly, or be arranged at jointly in the physical entities such as channel demodulator 630, channel decoder 650.Usually A/D unit 620 and receiving terminal radio frequency unit 610 are arranged in the same physical entity jointly, are called the receiving terminal radio-frequency module.
Particularly, receiving terminal radio frequency unit 610 receives from the superframe of multimedia communications system by antenna and sends to A/D unit 620; The 620 pairs of superframes of receiving in A/D unit carry out sending to after the analog-to-digital conversion GI delete cells 631 in the channel demodulator 630; The data that comprise in 631 pairs of superframes of receiving of GI delete cells are deleted the GI operation, and the superframe of having deleted GI is sent to FFT unit 632; The data that comprise in the 632 pairs of superframes of receiving in FFT unit are carried out sending to after the FFT operation and are separated planisphere map unit 633; Separate and send to information source identification and demultiplexing unit 640 after 633 pairs of superframes of receiving of planisphere map unit are separated planisphere mapping processing; Information source identification and demultiplexing unit 640 parse the control signaling that comprises in the timeslice from the superframe of receiving, determine according to the control signaling of resolving gained which is the timeslice that needs receive, and the superframe of receiving is carried out demultiplexing handle, will determine will to receive and finish timeslice institute data carried by data that demultiplexing handles again and send to deinterleaving decoding unit 652 in the channel decoder 650; 652 pairs of data of receiving of deinterleaving decoding unit carry out sending to descrambling unit 651 after deinterleaving and the decoding processing; The 651 pairs of data of receiving in descrambling unit carry out sending to information source buffer 660 after the scramble process; 660 pairs of data of receiving of information source buffer are carried out caching process, and send to information source player 670, play the data of receiving by information source player 670.
The purpose that 660 pairs of described data of information source buffer are carried out buffer memory is in order to reduce data rate, with the data rate of spontaneous emission in future end be reduced to can normal play degree.In actual applications,, then can remove information source buffer 660, descrambling unit 651 is directly linked to each other with information source player 670 if be not very high from the data rate of transmitting terminal.
In actual applications, channel demodulator 630 also has the lock unit of present widespread usage, channel estimation and equalization unit to link to each other.Wherein, lock unit is used for the signal of wanting demodulation is carried out operations such as time synchronized, frequency offset estimating, to guarantee that channel demodulator 630 can be to the correct demodulation of the signal of receiving; The channel estimation and equalization unit is used for the data of finishing FFT operation are carried out channel estimating and channel equalization operation, the harmful effect that may be subjected to when as far as possible eliminating data by Channel Transmission.
As seen, after as the multimedia communications system of transmitting terminal the data that will send being handled through scrambling, encode, interweave etc., just using 530 pairs of data of Multiplexing Unit carries out follow-up multiplexing operation, and adds in finishing multiplexing superframe and control signaling; Make as the UE of receiving terminal receive and the superframe of demodulation from multimedia communications system after, can use information source identification and demultiplexing unit 640 and directly read control signaling in the timeslice that superframe comprised of finishing demodulation, to determine that according to the control signaling that reads which timeslice in the superframe is the required timeslice of UE.Therefore, the time that UE is used to discern self required information source can obviously be shortened, and user satisfaction also can be improved significantly.
By the above as can be seen, method and system provided by the present invention all can effectively shorten the time of the required information source of multi-medium data receiving terminal identification self, and can improve user satisfaction.
Claims (12)
1, a kind of multimedia communication method is characterized in that, this method comprises:
A. transmitting terminal is mapped to the data of various information source respectively on the different timeslices, all timeslices are carried out multiplexing back form superframe, and in the superframe that forms, add the control signaling at each timeslice institute data carried by data, again the superframe that adds the control signaling is carried out launching after the modulation treatment;
B. after receiving terminal carries out demodulation process to the superframe from transmitting terminal, the control signaling that comprises in the timeslice of direct dissection process gained, and according to the definite timeslice that will receive of the control signaling of resolving gained.
2, the method for claim 1 is characterized in that, among the step a, comprises information source sign, timeslice temporal information in the described control signaling at least;
And the control signaling takies one group of subcarrier in the employed effective subcarrier of physical frame that described timeslice comprises, or takies at least one signaling symbols in the described physical frame.
3, method as claimed in claim 1 or 2 is characterized in that, among the step a, the method for described adding control signaling is:
Transmitting terminal adds and the corresponding control signaling of this timeslice institute data carried by data in the timeslice that superframe comprised that forms.
4, method as claimed in claim 2 is characterized in that, among the step b, determines that the method for described timeslice comprises:
Receiving terminal parses the control signaling from described timeslice, and read the information source sign that the control signaling that parses is comprised, judge whether this information source identifies identical with the information source sign of self required reception information source, if identical, the pairing timeslice of control signaling that receiving terminal determines to comprise this information source sign is the timeslice that will receive; Otherwise the pairing timeslice of control signaling that receiving terminal determines to comprise this information source sign is not the timeslice that will receive.
5, method as claimed in claim 4 is characterized in that, among the step a, further adds the timeslice temporal information and the information source sign of adjacent previous or next timeslice in the timeslice that superframe comprised; Perhaps, the timeslice temporal information and the information source sign that in each timeslice that superframe comprised, add other each timeslice;
Then among the step b, receiving terminal further reads the information source sign of described adjacent timeslice or other each timeslice, and judge whether the information source that reads identifies identical with the information source sign of self required information source, if identical, receiving terminal determines that it is the timeslice that will receive that this information source identifies pairing timeslice; Otherwise receiving terminal determines that it is not the timeslice that will receive that this information source identifies pairing timeslice.
6, as claim 4 or 5 described methods, it is characterized in that, during timeslice that receiving terminal has been determined to receive, further read the timeslice temporal information of this timeslice, and in the indicated time range of the timeslice temporal information that reads, receive timeslice from transmitting terminal.
7, a kind of transmitting terminal multimedia communications system is characterized in that, this system comprises message-source adapted device, channel encoder, Multiplexing Unit, Signaling Processing Unit, channel modulator, the transmitting terminal radio-frequency module that links to each other successively;
Wherein, the message-source adapted device is used for the data of each information source are carried out segmentation, encapsulation process and sent to channel encoder;
Channel encoder is used for the data of receiving are carried out encoding process and sent to Multiplexing Unit;
Multiplexing Unit is used for the data of receiving are carried out multiplexing, and the formed superframe in multiplexing back is sent to Signaling Processing Unit;
Signaling Processing Unit is used for sending to channel modulator after the superframe of receiving adds control signaling and pilot signal;
Channel modulator is used for the data of receiving are carried out modulation treatment and sent to the transmitting terminal radio-frequency module;
The transmitting terminal radio-frequency module is used for the superframe of receiving is carried out digital-to-analogue conversion and launches.
8, system as claimed in claim 7 is characterized in that,
Comprise the scrambling unit, the code interleaving unit that link to each other successively in the described channel encoder; Channel encoder links to each other with described message-source adapted device by scrambling unit, links to each other with described Multiplexing Unit by the code interleaving unit;
Comprise in the described channel modulator that the planisphere map unit, inverse discrete fourier transform IFFT unit, the protection interval GI that link to each other successively insert the unit, channel modulator links to each other with described Signaling Processing Unit by the planisphere map unit;
Described transmitting terminal radio-frequency module comprises successively digital-to-analogue conversion D/A unit, the transmitting terminal radio frequency unit that links to each other, and the transmitting terminal radio-frequency module inserts the unit by the D/A unit with GI in the described channel modulator and links to each other.
9, a kind of receiving terminal multimedia communications system is characterized in that, this system comprises receiving terminal radio-frequency module, channel demodulator, information source identification and demultiplexing unit, channel decoder, the information source player that links to each other successively;
Wherein, the receiving terminal radio-frequency module is used to receive from the superframe of transmitting terminal and carries out analog-to-digital conversion, and the superframe that also will finish conversion sends to channel demodulator;
Channel demodulator is used for the superframe of receiving is carried out demodulation process and sends to information source identification and demultiplexing unit;
Information source identification and demultiplexing unit, be used for parsing the control signaling that comprises the timeslice from the superframe of receiving, determine according to the control signaling of resolving gained which is the timeslice that needs receive, and the superframe of receiving is carried out demultiplexing handle, will determine that also the timeslice institute data carried by data that will receive and finish the demultiplexing processing sends to channel decoder;
Channel decoder is used for the data of receiving are carried out decoding processing and sent to the information source player;
The information source player is used to play the data of receiving.
10, system as claimed in claim 9 is characterized in that,
Described receiving terminal radio-frequency module comprises successively transmitting terminal radio frequency unit, the analog-digital conversion a/d unit that links to each other, and the receiving terminal radio-frequency module links to each other with GI delete cells in the described channel demodulator by the A/D unit;
Comprise continuous successively GI delete cells, discrete Fourier transform (DFT) FFT unit in the described channel demodulator, separate the planisphere map unit, channel demodulator links to each other with described information source identification and demultiplexing unit by separating the planisphere map unit;
Comprise the descrambling unit, the deinterleaving decoding unit that link to each other successively in the described channel decoder; Channel decoder links to each other with described information source player by the descrambling unit, links to each other with described information source identification and demultiplexing unit by the deinterleaving decoding unit.
11, system as claimed in claim 9 is characterized in that, further is connected with the information source buffer between described channel decoder and the information source player, and the information source buffer is used for carrying out caching process and send to the information source player from the data of channel decoder.
12, a kind of multimedia communications system, it is characterized in that, this system comprises transmitting terminal communicator and receiving terminal communicator, and the transmitting terminal communicator comprises message-source adapted device, channel encoder, Multiplexing Unit, Signaling Processing Unit, channel modulator, the transmitting terminal radio-frequency module that links to each other successively; The receiving terminal communicator comprises receiving terminal radio-frequency module, channel demodulator, information source identification and demultiplexing unit, channel decoder, the information source player that links to each other successively;
Wherein, the message-source adapted device is used for the data of each information source are carried out segmentation, encapsulation process and sent to channel encoder; Channel encoder is used for the data of receiving are carried out encoding process and sent to Multiplexing Unit; Multiplexing Unit is used for the data of receiving are carried out multiplexing, and the formed superframe in multiplexing back is sent to Signaling Processing Unit; Signaling Processing Unit is used for sending to channel modulator after the superframe of receiving adds control signaling and pilot signal; Channel modulator is used for the data of receiving are carried out modulation treatment and sent to the transmitting terminal radio-frequency module; The transmitting terminal radio-frequency module is used for the superframe of receiving is carried out digital-to-analogue conversion and launches;
The receiving terminal radio-frequency module is used to receive from the superframe of transmitting terminal and carries out analog-to-digital conversion, and the superframe that also will finish conversion sends to channel demodulator; Channel demodulator is used for the superframe of receiving is carried out demodulation process and sends to information source identification and demultiplexing unit; Information source identification and demultiplexing unit, be used for parsing the control signaling that comprises the timeslice from the superframe of receiving, determine according to the control signaling of resolving gained which is the timeslice that needs receive, and the superframe of receiving is carried out demultiplexing handle, will determine that also the timeslice institute data carried by data that will receive and finish the demultiplexing processing sends to channel decoder; Channel decoder is used for the data of receiving are carried out decoding processing and sent to the information source player; The information source player is used to play the data of receiving.
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| CNB200610058207XA CN100499822C (en) | 2006-02-24 | 2006-02-24 | Multimedia communication method and system |
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| CNB200610058207XA CN100499822C (en) | 2006-02-24 | 2006-02-24 | Multimedia communication method and system |
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| CN100499822C CN100499822C (en) | 2009-06-10 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9813211B2 (en) | 2006-11-13 | 2017-11-07 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and arrangement for pilot pattern based control signaling in MIMO systems |
| CN103873201B (en) * | 2008-11-13 | 2018-02-02 | Lg电子株式会社 | Method for sending and receiving signal |
| CN109982381A (en) * | 2019-04-30 | 2019-07-05 | 河南工学院 | Traceless education method and system based on mobile terminal |
| CN110392450A (en) * | 2018-04-19 | 2019-10-29 | 武汉芯泰科技有限公司 | A kind of wireless self-networking communication means and device based on the time-division |
-
2006
- 2006-02-24 CN CNB200610058207XA patent/CN100499822C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9813211B2 (en) | 2006-11-13 | 2017-11-07 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and arrangement for pilot pattern based control signaling in MIMO systems |
| US10298373B2 (en) | 2006-11-13 | 2019-05-21 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and arrangement for pilot pattern based control signaling in MIMO systems |
| CN103873201B (en) * | 2008-11-13 | 2018-02-02 | Lg电子株式会社 | Method for sending and receiving signal |
| CN110392450A (en) * | 2018-04-19 | 2019-10-29 | 武汉芯泰科技有限公司 | A kind of wireless self-networking communication means and device based on the time-division |
| CN110392450B (en) * | 2018-04-19 | 2022-06-21 | 武汉芯泰科技有限公司 | Time division based wireless ad hoc network communication method and device |
| CN109982381A (en) * | 2019-04-30 | 2019-07-05 | 河南工学院 | Traceless education method and system based on mobile terminal |
| CN109982381B (en) * | 2019-04-30 | 2022-05-13 | 河南工学院 | Traceless education method and system based on mobile terminal |
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| Publication number | Publication date |
|---|---|
| CN100499822C (en) | 2009-06-10 |
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