WO2006050657A1 - Methode et dispositif pour un codage multidebit adaptatif et pour un transfert de paroles - Google Patents

Methode et dispositif pour un codage multidebit adaptatif et pour un transfert de paroles Download PDF

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Publication number
WO2006050657A1
WO2006050657A1 PCT/CN2005/001803 CN2005001803W WO2006050657A1 WO 2006050657 A1 WO2006050657 A1 WO 2006050657A1 CN 2005001803 W CN2005001803 W CN 2005001803W WO 2006050657 A1 WO2006050657 A1 WO 2006050657A1
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Prior art keywords
frame
rate
amr
voice
adaptive multi
Prior art date
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PCT/CN2005/001803
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English (en)
Chinese (zh)
Inventor
Wei Xiang
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Wei Xiang
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Publication date
Priority claimed from CNB2004100680567A external-priority patent/CN1312946C/zh
Priority claimed from CN2005100241263A external-priority patent/CN1829343B/zh
Application filed by Wei Xiang filed Critical Wei Xiang
Publication of WO2006050657A1 publication Critical patent/WO2006050657A1/fr

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/16—Vocoder architecture
    • G10L19/18—Vocoders using multiple modes
    • G10L19/24—Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding

Definitions

  • the present invention relates to a method for adaptive and multi-rate coding in a Universal Mobile Telecommunications System (UMTS) and for transmitting data generated by said coding, and related mobile stations, and in particular to improved adaptive multi-rate (AMR) coding Method of encoding and associated mobile station equipment, method of processing data output to an adaptive multi-rate (AMR) decoder, and associated mobile station equipment, access and control adaptive multi-rate during radio access ( AMR)
  • AMR adaptive multi-rate during radio access
  • AMR A method of encoding frames and a method of transmitting adaptive multi-rate (AMR) coded bits on a medium core network (CN) and a radio access network (RAN) interface.
  • variable rate speech coder performs the function of adaptive multi-rate (AMR) encoding
  • the central processor running the communication protocol stack software sets the mode of the variable rate speech coder, and is responsible for
  • TFC transport format combination
  • AMR adaptive multi-rate
  • the channel coder reads the adaptive multi-rate (AMR) encoded frame from the storage unit of the adaptive multi-rate (AMR) encoded frame generated by the variable rate speech coder; the channel decoder Complete channel decoding to generate an adaptive multi-rate (AMR) coded frame, and the variable rate voice decoder reads the adaptive multi-rate (AMR) coded frame from the memory unit of the channel adaptive decoder's placed adaptive multi-rate (AMR) coded frame for translation code.
  • AMR adaptive multi-rate
  • AMR adaptive multi-rate
  • TS Technical Specification
  • AMR Adaptive Multi-Rate
  • 3GPP TS 26.071 specifies that an adaptive multi-rate (AMR) encoder takes a 13-bit pulse code modulation (PCM) format voice signal as input, or converts other format voice signals to 13-bit precision.
  • a voice signal in a pulse code modulation (PCM) format is used as an input.
  • the encoder has a sampling rate of 8000 samples/second.
  • the encoder encodes a block of 160 samples of 13-bit precision pulse code modulation (PCM) format, resulting in encoding modes of 12.2, 10.2, 7.95, 7.40.
  • 3GPP TS 26.171 specifies that an adaptive multi-rate (AMR) encoder takes a 14-bit pulse code modulation (PCM) format voice signal as input, or converts other format voice signals into 14-bit precision pulses.
  • a voice signal in a coded modulation (PCM) format is used as an input.
  • the encoder has a sampling rate of 16,000 samples/second.
  • the encoder encodes a block of 320 14-bit pulse code modulation (PCM) format samples, producing encoding modes of 23.85, 23.05, 19.85, 18.25, 15.85. , a voice coded frame of 14.25, 12.65, 8.85, 6.6 kbps or a silence coded frame.
  • 3GPP TS 26.071 and TS 26.171 specify that an adaptive multi-rate (AMR) encoder can change the bit rate of a voice coded frame every 20 milliseconds according to a command to change the coding mode.
  • 3GPP TS 26.101 and TS 26.201 specify that in the content of each frame of the adaptive multi-rate (AMR) encoder output, the coding mode of the frame and the indication of the adaptive multi-rate (AMR) encoder should be indicated.
  • the coding mode and the request coding mode, and the coding mode of the frame, the indication coding mode, and the request coding mode are unique.
  • a core network exchanges signaling messages with the Radio Access Network (RAN) using the RANAP protocol, and transmits the attributes of the Radio Access Bearer (RAB) to the Radio Access Network (RAN), which includes adaptation.
  • AMR Multi-rate
  • a Radio Network Controller schedules a Radio Access Bearer Substream Combination Indicator (RFCI) according to the Radio Access Bearer (RAB) attributes, which correspond to the mode of an Adaptive Multi Rate (AMR) 20 msec voice frame.
  • RFCI Radio Access Bearer Substream Combination Indicator
  • RAB Radio Access Bearer
  • a radio network controller configures a number of dedicated channels (DCHs) that cooperate to work according to the RFCI, and one transport format (TF) in the DCH corresponds to one RFCI, so one RFCI corresponds to one or more transport format combination identifiers ( TFCI), the TFCI also corresponds to the mode of an adaptive multi-rate (AMR) 20 millisecond voice frame.
  • DCHs dedicated channels
  • TF transport format combination identifiers
  • AMR adaptive multi-rate
  • a radio network controller transmits a core network-radio access network interface initialization frame (Iu initialisation frame) to inform the core network of several RFCIs and associated radio access bearers (RABs) that it can provide to the pattern converter.
  • Iu initialisation frame a core network-radio access network interface initialization frame
  • RABs radio access bearers
  • a mobile station (UE) configures several DCHs that work cooperatively, and requires interaction of RRC signaling messages between a radio network controller (RNC) and a mobile station (UE) during configuration, and the mobile station (UE) can be based on a transport format.
  • RRC radio network controller
  • UE mobile station
  • TF informs the voice codec of the radio access bearer (RAB) sub-flow structure of the voice received and to be transmitted, the radio access bearer (RAB) sub-flow structure is Adaptive Multi-Rate (AMR) Class of bits for a 20 millisecond voice frame.
  • AMR Adaptive Multi-Rate
  • a piece of RFCI and its associated radio access bearer (RAB) substream size information obtained from the core network-radio access network (Iu) interface initialization frame (Iu initialisation frame) is sent to the code converter
  • the decoder is for configuration use.
  • the RPCI in the core network-radio access network user plane (Iu UP) frame is set to be the same as the adaptive multi-rate (AMR). a value corresponding to the mode of the 20 millisecond voice frame;
  • the core network-radio access network user plane (Iu UP) frame is decomposed into a plurality of DCHs working in cooperation, and the DCHs have different bit protection levels;
  • the TFCI of the radio frame is selected by the medium access layer MAC;
  • the mobile station (UE) receives the SDUs containing the voice frames from a number of DCHs that work together and restores them to an adaptive multi-rate (AMR) 20 millisecond voice frame, which can be used to indicate the structure of the voice frame to the voice codec.
  • AMR adaptive multi-rate
  • each 20 millisecond voice input is converted into a coded frame of a particular adaptive multi-rate (AMR) mode.
  • AMR adaptive multi-rate
  • the transmission data in the transmission channel is sent to the composite channel, and is subjected to operation steps such as CRC pasting, transport block concatenation/code block splitting, channel coding, etc., and becomes an input bit sequence of the rate matching module.
  • the output bit sequence that matches the number of bits of the radio frame of the physical channel by the rate matching output, when the rate matching puncturing has the maximum puncturing ratio limit, the transmission data that causes the number of puncturing to exceed the ratio limit will be Active discarding.
  • the maximum punch ratio is not limited for rate matching punches, those transmitted data with too large punch ratio cannot be correctly restored at the receiving end.
  • the physical channel rate equivalent to the number of physical frame radio frame bits can determine the validity of the transport channel format combination; the effective transport format combination concentrates those transmissions corresponding to the adaptive multi-rate (AMR) 20 millisecond voice frame mode.
  • the combination of channel formats determines the effective adaptive multi-rate (AMR) voice frame mode.
  • the Universal Mobile Telecommunications System introduces a combination of transport channel and transport format to schedule data from a logical channel to a transport channel during a periodic time interval. This time interval is called the transmission time interval (TTI) and the data is in accordance with the transport format (TF).
  • TTI transmission time interval
  • TF transport format
  • the transmission format is fixed during a given transmission time interval ( ⁇ ) interval, which also fixes the size, number, error correction coding mode, and rate matching parameter of the data block to be transmitted.
  • the transport format list of the transport channels used to construct the composite channel constitutes a Transport Format Combination (TFC).
  • the Radio Resource Control (RRC) unit configures a Transport Format Combination Set (TFCS) for the Media Intervention Control Unit MAC and Physical Layer.
  • RRC Radio Resource Control
  • TFC Transport Format Combination
  • a valid adaptive multi-rate (AMR) coded frame is three or two or one class of bits, each class occupying one transmission channel.
  • the prior art uses a fixed 20 millisecond transmission time interval ( ⁇ ) transport format combination to schedule a class of an adaptive multi-rate (AMR) frame to a transmission of the format using one of the combinations.
  • the method on the channel transmits an adaptive multi-rate (AMR) frame, and one frame outputted by the adaptive multi-rate (AMR) encoder every 20 milliseconds is carried by a transport block within a 20 millisecond transmission time interval (TTI), at each
  • TTI transmission time interval
  • the transmission format of the transmission channel corresponding to each class is selected according to the mode of the encoded frame output by the adaptive multi-rate (AMR) encoder, the format of the transmission channel of the voice data, and the format of the transmission channel of other data.
  • the transport format combination is formed, which of course is a combination of valid transport formats in the transport format combination set.
  • the radio link between the mobile station and the radio access network changes: this change is a temporary interruption of the radio link during hard handover; the soft handover is none Intermittent switching, but there is often a temporary decrease in the physical channel rate of the radio link during handover. It can be seen that this change in physical channel causes a loss of several adaptive multi-rate (AMR) 20 millisecond voice frames during handover.
  • AMR adaptive multi-rate
  • AMR adaptive multi-rate
  • the party transmitting the adaptive multi-rate (AMR) voice frame is sent at a fixed rate of one frame every 20 milliseconds. When a frame cannot be transmitted in a certain 20 milliseconds, the frame is discarded, and a voice frame is scheduled in the next 20 milliseconds.
  • An adaptive multi-rate (AMR) speech frame every 20 milliseconds from the encoding of an adaptive multi-rate (AMR) speech encoder speech. For each 20 millisecond voice, the air transmission time of its adaptive multi-rate (AMR) voice frame is fixed and unchangeable.
  • AMR adaptive multi-rate
  • UE mobile station
  • AMR adaptive multi-rate
  • UMTS Universal Mobile Telecommunications System
  • the technical problem to be solved by the present invention is to reduce the loss of an adaptive multi-rate (AMR) 20-millisecond speech frame during a voice call, although adaptive multi-rate (AMR) can avoid error frame loss by error concealment techniques. Negative effects, but this avoidance of error concealment techniques only works well for the loss of individual frames, because it uses the adjacent voice frames that have been received to construct the lost frames, so between the constructed lost frames and the actual lost frames. There is an error, and when the interval between lost frames is small or even continuous, the error of the subsequent lost frames becomes large.
  • AMR adaptive multi-rate
  • AMR adaptive multi-rate
  • a sudden drop in the physical channel rate can invalidate the original effective adaptive multi-rate (AMR) voice frame transmission format combination, causing adaptive multi-rate (AMR) voice frame loss.
  • AMR adaptive multi-rate
  • the adaptive multi-rate (AMR) voice coding mode generally requires a waiting time of 40 milliseconds or more, because the mobile station acquires the information of the physical channel rate change from the received radio frame to a time of 20 milliseconds of radio frame.
  • Changing the Adaptive Multi-Rate (AMR) voice coding mode takes at least 20 milliseconds to take effect; the second is to use the new Transport Format Combination (TFC), which is required when it is a Transport Format Combination (TFC) that needs to be configured. Signaling configuration process.
  • TFC Transport Format Combination
  • AMR transport adaptive multi-rate
  • TFC transport format combination
  • AMR transport adaptive multi-rate
  • the voice frame is lost, that is, the frame is stolen.
  • the proportion of non-voice services increases, and the complexity and number of signaling messages are greatly improved. More importantly, the composite channel mapped to the physical channel is used in the UMTS system to carry logical channels of all services.
  • the physical channel of the voice service is separated from the physical channel of the packet service, so that when the scheduling of the packet traffic channel preempts the physical channel, especially when the logical channel of the packet service has a higher priority than the voice logical channel, the voice
  • the number of times a channel is stolen is greatly increased, and a mechanism for reducing the negative impact of stealing frames is required.
  • the adaptive multi-rate (AMR) voice frame will be lost. If it is a soft handover and there is a temporary decrease in the physical link rate of the radio link, it may also cause Adapt to multi-rate (AMR) voice frame loss.
  • AMR adaptive multi-rate
  • the adaptive multi-rate (AMR) coded frame for each transport format combination selection as described in the background comes from an adaptive multi-rate (AMR) encoder, ie, adaptive multi-rate (AMR)
  • AMR adaptive multi-rate
  • the encoder refreshes the storage unit of the adaptive multi-rate (AMR) coded frame once every 20 milliseconds with the generated adaptive multi-rate (AMR) coded frame, and the channel encoder reads the adaptive from the memory unit every 20 milliseconds.
  • Multi-rate (AMR) encodes frames and encodes and multiplexes them.
  • the transport format combination selection is limited by those transport format combinations that are valid in the Transport Format Combination Set (TFCS) when performing the selection, often due to rapid channel changes, bursty signaling messages, and ".
  • TFCS Transport Format Combination Set
  • the present invention provides a technical solution for adaptive multi-rate (AMR) voice transmission control on a coding control, a transmission channel, and transmission and reception on a core network-radio access network (Iu) interface.
  • AMR adaptive multi-rate
  • AMR adaptive multi-rate
  • the scheme of encoding and transmitting in a mobile station of the present invention is a method of generating and transmitting an adaptive multi-rate (AMR) coded frame in a mobile station.
  • AMR adaptive multi-rate
  • an adaptive multi-rate (AMR) encoder passes The input voice signal is sampled to obtain a voice frame of 20 milliseconds in length. Each voice frame contains a sample sample of 20 millisecond voice, and encodes a 20 millisecond voice frame, which is generated in accordance with the Universal Mobile Telecommunications System (UMTS) standard.
  • UMTS Universal Mobile Telecommunications System
  • the wireless interface function unit is required to transmit voice data in the form of an adaptive multi-rate (AMR) coded frame, and the wireless interface function unit transmits the voice data according to the transmission format of each transport channel.
  • AMR adaptive multi-rate
  • An encoding command is issued to an adaptive multi-rate (AMR) encoder, the encoding command specifying a plurality of adaptive multi-rate (AMR) modes, the adaptive multi-rate (AMR) encoder according to the encoding command to a 20 millisecond voice
  • the effective voice frame coding sequence generated by frame coding is either a set of multiple adaptive multi-rate (AMR) voice coded frames or an adaptive multi-rate (AMR) silence coded frame, when the voice frame coding sequence is When multiple adaptive multi-rate (AMR) speech encoded frames, the mode of the adaptive multi-rate (AMR) encoded frame is consistent with the adaptive multi-rate (AMR) mode in the encoded command;
  • the process of transmitting an adaptive multi-rate (AMR) coded frame in a voice frame coding sequence to a transmission channel comprising selecting an adaptive multi-rate (AMR) coded frame in the voice frame coding sequence And selecting a transport format combination, the selected transport format combination, including the transmission format of all the bits of the selected adaptive multi-rate (AMR) coded frame, and using the transport format combination to select the adaptive multi-rate ( AMR)
  • the coded frame is scheduled onto the transport channel.
  • the remaining adaptive multi-rate (AMR) coded frames in the voice frame coding sequence are discarded after transmission of an adaptive multi-rate (AMR) coded frame is selected.
  • the above-mentioned wireless interface functional unit in the scheme of coding control and transmission in the mobile station is a functional unit that provides an air interface for the user data of the mobile station, and its input is user data such as voice, packet and signaling, and the output is a radio frame. It is compliant with communication protocols for Radio Resource Control (RRC), Radio Link Control (RLC), Media Access Control Unit (MAC), and Physical Layer (PHY).
  • RRC Radio Resource Control
  • RLC Radio Link Control
  • MAC Media Access Control Unit
  • PHY Physical Layer
  • TFC transport format combination
  • TFC transport format combination
  • AMR Transport Format Combination
  • TFC Transport Format Combination
  • the first in first out The (FIFO) buffer replaces the voice frame coding sequence that the original memory unit accepts from the adaptive multi-rate (AMR) encoder output.
  • the present invention provides a mobile station in a universal mobile communication system, the mobile station's adaptive multi-rate (AMR)
  • the encoder encodes a 20 millisecond length voice frame encoding to produce an output of the voice frame encoding sequence
  • the mobile station includes a first in first out (FIFO) buffer coupled to the output of the adaptive multi-rate (AMR) encoder, the first in first out The (FIFO) buffer includes - a data input interface for reading a sequence of voice frame codes generated by adaptive multi-rate (AMR) encoder encoding,
  • a data output interface for reading a stored voice frame code sequence from the first in first out (FIFO) buffer, a memory state interface for outputting a voice frame code sequence stored in the first in first out (FIFO) buffer The number and type of voice frame encoding sequence in it.
  • the storage of the first-in-first-out (FIFO) buffer is limited to a voice frame coding sequence
  • the voice frame coding sequence is subsequently written. cover.
  • more than two voice frame coding sequences can be stored in the above-mentioned first-in, first-out (FIFO) buffer, so that it is easy to read after 20 milliseconds of failure to read, gp, using the following A method of generating and transmitting adaptive multi-rate (AMR) coded frames in a discontinuous manner in a mobile station.
  • AMR adaptive multi-rate
  • the mobile station reads the type of the voice frame coding sequence to be processed from the storage state interface of the first in first out (FIFO) buffer, and when the voice frame coding sequence to be processed is a valid voice frame coding sequence to be transmitted, the voice is The frame coding sequence selects a transport format combination, and transmits an adaptive multi-rate (AMR) coded frame in the voice frame coding sequence in combination with the selected transmission format.
  • AMR adaptive multi-rate
  • the transport format (TF) configured according to the radio interface protocol functional unit of the mobile station can determine the class bits of the adaptive multi-rate (AMR) mode encoded frame corresponding thereto, and then determine according to the configured transport format combination (TFC). It corresponds to an adaptive multi-rate (AMR) mode so that an optional range of modes in the encoded command can be obtained from the configured Transport Format Combination Set (TFCS).
  • AMR adaptive multi-rate
  • TFC transport format combination
  • TFCS Transport Format Combination Set
  • a scheme for determining encoding control and transmission of a mode in an encoding command according to a radio interface protocol in a mobile station is: a method of generating and transmitting an adaptive multi-rate (AMR) encoded frame in a mobile station as described above, each of said encoding commands
  • the adaptive multi-rate (AMR) mode corresponds to a voice transmission format combination of the mobile station's transport format combination set, which includes an adaptive multi-rate (AMR) mode coded frame for all types of bit transmissions.
  • the format of the transport format combination is: a method of generating and transmitting an adaptive multi-rate (AMR) encoded frame in a mobile station as described above, each of said encoding commands
  • the adaptive multi-rate (AMR) mode corresponds to a voice transmission format combination of the mobile station's transport format combination set, which includes an adaptive multi-rate (AMR) mode coded frame for all types of bit transmissions.
  • the format of the transport format combination is: a method of generating and transmitting an adaptive multi-
  • the mobile station can match the mode of the frame output by the adaptive multi-rate (AMR) encoder with the changed transport format combination (TFC), and the mobile station wireless interface protocol functional unit can wirelessly The changes on the link are reflected to the adaptive multi-rate (AMR) encoder.
  • the wireless interface protocol function unit can detect such a fast change state and can request The encoder adapts to this fast change in a manner that outputs multi-mode adaptive multi-rate (AMR) encoded frames.
  • AMR Adaptive multi-rate
  • the coding and transmission scheme on the network side of the Universal Mobile Telecommunications System is similar to that in the mobile station, and the present invention provides an adaptive multi-speed generation and transmission on the network side of the Universal Mobile Telecommunications System (UMTS).
  • Rate (AMR) method of encoding frames during a voice call, a pattern converter in the core network converts the input voice encoded signal into an adaptive multi-rate (AMR) encoded frame, said adaptive multi-rate (AMR)
  • the coded frame is placed on the Iu user plane frame and sent to the Radio Network Controller (RNC), and the Radio Network Controller (RC) transmits voice data on the transport channel, characterized by - transmitting an encoding command to the pattern converter,
  • the encoding command specifies a plurality of adaptive multi-rate (AMR) modes, and the pattern converter encodes the input voice encoded signal according to the encoding command, and generates a valid voice frame encoding sequence of 20 milliseconds length voice.
  • AMR adaptive multi-rate
  • AMR adaptive multi-rate
  • AMR adaptive multi-rate
  • a Radio Network Controller the process of scheduling an adaptive multi-rate (AMR) coded frame in a voice frame coding sequence to a transmission channel, including selecting an adaptive multi-rate (AMR) in the sequence of voice frame codes Encoding the frame and selecting a combination of transmission formats, and selecting the combination of the transmission formats, including the transmission format of all the bits of the selected adaptive multi-rate (AMR) coded frame, and using the combination of the transmission formats to select the adaptive Multi-rate (AMR) coded frames are scheduled onto the transport channel.
  • the remaining adaptive multi-rate (AMR) coded frames in the voice frame coding sequence are discarded after transmission of an adaptive multi-rate (AMR) coded frame is selected.
  • the scheme for determining the encoding generation and transmission of the mode in the encoding command by the radio network controller (RNC) on the network side of the Universal Mobile Telecommunications System (UMTS) is generated and transmitted in the network side of the Universal Mobile Telecommunications System (UMTS) as described above.
  • a method for adapting a multi-rate (AMR) coded frame the radio network controller (RC) transmits a core network-radio access network interface (Iu) user plane rate control frame to the core network, and a core network-radio access network interface (Iu)
  • the radio frequency identification indicator (RFCI n indicator) field of the plurality of radio access bearer substream combination indications in the user plane rate control frame is corresponding to a plurality of radio access bearer substream combination indications (RFCI), and the radio access bearers are
  • the stream combination indication (RPCI) corresponds to an adaptive multi-rate (AMR) mode, and after the core network receives the core network-radio access network interface (Iu) user plane rate control frame, sends the signal to the pattern converter.
  • Encoding command, the multiple adaptive multi-rate (AMR) modes specified in the coding command are the multiple adaptations corresponding to the radio access bearer substream combination indication (RFCI) Rate (AMR) voice mode.
  • the present invention proposes a method for delay transmission of adaptive multi-rate (AMR) coded frames during transmission of voice channels or physical channels to stop transmitting voice data, and corresponding mobile station adaptive multi-rate (AMR) delay translation.
  • AMR adaptive multi-rate
  • the method of the code Delayed transmission is combined with the above-mentioned method of generating and transmitting a voice frame coding sequence, because the channel when transmitting again after delay may be different from the channel originally intended to be transmitted, and the original adaptive multi-speed cannot be used.
  • the rate (AMR) voice mode must look for a suitable adaptive multi-rate (AMR) mode.
  • the characteristics of real-time voice are:
  • the end-to-end delay is small, and the maximum allowable end-to-end delay is determined according to the person's perception of the audio session.
  • the subjective evaluation of the end-to-end delay is acceptable between 200-300 milliseconds. Therefore, as long as the method of the present invention controls the end-to-end delay to less than 200 milliseconds, it does not cause significant degradation in service quality in terms of delay.
  • AMR mobile station delay adaptive multi-rate
  • the mobile station adaptive multi-rate (AMR) decoder delay decoding scheme proposed by the present invention is: a method for a mobile station to process an adaptive multi-rate (AMR) coded frame, the mobile station transmitting voice An adaptive multi-rate (AMR) coded frame is received on the transport channel, and the adaptive multi-rate (AMR) decoder performs the adaptive multi-rate (AMR) coded frame received by the mobile station in a first to last order every 20 milliseconds.
  • a decoded output of an adaptive multi-rate (AMR) coded frame characterized by - setting up a buffer area for placing an adaptive multi-rate (AMR) coded frame for a voice call and a lower limit value of the buffer area, from the mobile station.
  • AMR adaptive multi-rate
  • AMR adaptive multi-rate
  • the received adaptive multi-rate (AMR) voice coded frame is stored in the buffer area, and the adaptive multi-rate is in the buffer area ( AMR)
  • the adaptive multi-rate (AMR) decoder begins decoding the adaptive multi-rate (AMR) coded frame received by the mobile station.
  • SPEECH voice
  • AMR adaptive multi-rate
  • AMR cache adaptive multi-rate
  • the subsequent transmission involves selecting a mode of frame transmission from a plurality of mode adaptive multi-rate (AMR) voice coded frames in the sequence, and transmitting the adaptive multi-rate (AMR) voice coded frame
  • AMR adaptive multi-rate
  • the Radio Network Controller (RNC) can also be a mobile station.
  • the adaptive multi-rate (AMR) coded frame uses the transparent mode RLC layer mode, and does not add a sequence number to the protocol data unit carrying the adaptive multi-rate (AMR) coded frame, and the receiver follows the received adaptive multi-rate (AMR) coded frame.
  • the chronological ordering if there is no adaptive multi-rate (AMR) coded frame available for the receiver in two radio frames every 20 milliseconds, the receiver inserts a received lost frame, and the type of the received lost frame is 3GPP TS26.
  • the reception type (RX_TYPE) in the 101 table of Table 101 (Table lc) is of the type of no data (NO-DATA).
  • the adaptive multi-rate (AMR) voice coded frame transmission is performed every 20 milliseconds in an uneven manner in the method of the present invention, it is necessary to add the received loss frames added by the error caused by the uneven transmission from the buffer area. Deleting, eliminating the negative effects caused by unevenly transmitting voice frames, such a method of utilizing the buffer storage space to accommodate temporary pauses in voice transmission such that the time of the adaptive multi-rate (AMR) voice coded frames at the time of encoding completion The distance is kept to the maximum extent.
  • the mobile station has two modes of operation-one-speech (SPEECH) mode and comfort noise (COMFORT-NOISE) mode.
  • SPEECH comfort noise
  • COMFORT-NOISE comfort noise
  • the sender intermittently transmits a silence frame
  • the receiver receives the lost frame that is actively added. Effective.
  • SPEECH voice
  • AMR multi-rate
  • AMR peer multi-rate
  • Received lost frames that do not have a corresponding multi-rate (AMR) voice-coded frame are redundant and do not compensate for the loss of multi-rate (AMR) voice-coded frames. If they cannot be deleted by the delete operation of the uneven transmission mode, the voice will be caused. The delay and quality are degraded, so there is a certain limit on the number of actively added received lost frames:
  • a buffer adaptive multi-rate (AMR) coded frame of the mobile station and a receiving method for adding and deleting a received lost frame, setting a limit number of the received lost frame actively added in the voice (SPEECH) mode of the buffer area, When the number of received lost frames actively added in the voice zone (SPEECH) mode reaches the limit number, the received loss frame is no longer added in the voice (SPEECH) mode.
  • AMR buffer adaptive multi-rate
  • the above limitation is imposed on the number of actively added received lost frames because: the number of delayed multi-rate (AMR) coded frames that can be accommodated on the path from the transmitting mobile station to the receiving mobile station's RNC is limited, Therefore, the number of received loss frames actively added in the SPEECH mode corresponding thereto is also limited, and the number limit value should be included to reflect this limitation.
  • AMR delayed multi-rate
  • the mobile station proposed by the present invention that is, a mobile station in a universal mobile communication system, the mobile station including a first in first out connection connected to an input of an adaptive multi-rate (AMR) decoder (FIFO) cache, this first in first out (FIFO) cache includes:
  • AMR adaptive multi-rate
  • a data output interface for reading the stored adaptive multi-rate (AMR) encoded frame from the first in first out (FIFO) buffer
  • a storage status interface for outputting the length of the adaptive multi-rate (AMR) encoded frame queue stored in the first in first out (FIFO) buffer and the type of the encoded frame
  • control unit configured to delete the adaptive multi-speed stored in the first in first out (FIFO) buffer according to the delete instruction Rate-of-Availability (AMR) encoded non-data (NO-DATA) type of adaptive multi-rate (AMR) coded frames in a frame queue.
  • AMR Rate-of-Availability
  • NO-DATA non-data
  • AMR adaptive multi-rate
  • Radio Network Controller For a Radio Network Controller (RNC) that transmits an Adaptive Multi-Rate (AMR) coded frame, it can use the receiver's mobile station's receive buffer lower-limit value to control its adaptation in the transmit buffer when switching.
  • the number of multi-rate (AMR) coding sequences therefore, a mechanism is needed to transmit the receiving buffer lower limit value of the receiving mobile station, and the present invention proposes that the mobile station sends a message containing the buffer lower limit value to the network side.
  • the lower limit value is transmitted to the core network and the radio network controller (RNC), and the network side delay mode is sent to control the delay, and the mobile station can also limit the buffer area of the scheme in the intermittent manner. This is used as a reference when setting the value.
  • AMR adaptive multi-rate
  • the technical solution for the intermittent transmission of the mobile station is: according to the above-mentioned method for generating and transmitting an adaptive multi-rate (AMR) coded frame in the mobile station, during the time when the mobile station pauses to transmit the radio frame carrying the voice data from the adaptive multi-rate (AMR) encoder's voice frame coding sequence is buffered, and after the pause is completed, more than one every 20 milliseconds is scheduled during the transmission of the adaptive multi-rate (AMR) coded frame in the voice frame coding sequence to the transmission channel.
  • Adaptive Multi-Rate (AMR) A method of encoding a frame to a transmission channel, processing some or all of the voice frame coding sequences that are buffered.
  • the prior art uses a fixed 20 millisecond transmission time interval (TTI) transport format combination to schedule a class of adaptive multi-rate (AMR) frames to a transmission of the format using one of the combinations.
  • TTI transmission time interval
  • the method on the channel transmits an adaptive multi-rate (AMR) frame, and the present invention will no longer adopt a fixed transmission time interval (TTI), but instead selects a transmission sequence of the to-be-processed voice frame to be transmitted.
  • a time interval ( ⁇ ) variable transport format combination such as a transport format combination with a transmission time interval (TTI) of 10 milliseconds to transmit an adaptive multi-rate (AMR) frame of one of the voice frame coding sequences.
  • the value of the transmission time interval (TTI) can be determined according to the number of voice frame coding sequences stored in the first in first out (FIFO), one method is
  • a transmission format combination having a transmission time interval (TTI) of 10 milliseconds is preferred, and the present invention suggests that the specified number is one.
  • a mobile station pauses to transmit a radio frame, which belongs to the category of a radio frame that suspends transmission of voice data.
  • Cell handover is the most common, and other: dynamic channel adjustment, that is, the mobile station switches from one physical channel to Another physical channel.
  • the mobile station does not suspend the transmission of the radio frame during the stealing of the frame, it belongs to the category of the radio frame in which the transmission of the voice data is suspended.
  • the voice frame coding is performed.
  • Adaptive Multi-Rate (AMR) in the sequence to encode a frame to the transmission channel, scheduling one every 20 milliseconds More than one (excluding one) adaptive multi-rate (AMR) coded frame to transport channel, processing part or all of the voice frame coding sequence being buffered.
  • An adaptive multi-rate (AMR) coded frame that cannot be transmitted during a cell handover.
  • the buffered adaptive multi-rate (AMR) coded frame is transmitted at a rate of more than one every 20 milliseconds. There is no pause in voice delivery during this period. This is the advantage of this method, which overcomes the discomfort that the voice frame loss caused by the handover brings to the listener.
  • the technical solution for interrupting the transmission of the buffered voice data is: according to the above method of generating and transmitting an adaptive multi-rate (AMR) coded frame in the mobile station, prioritizing the scheduling of other logical channels higher than the priority of the voice logical channel to During the pause of voice data transmission on the transport channel, the voice frame coding sequence from the adaptive multi-rate (AMR) encoder is buffered, and the adaptive multi-rate (AMR) in the transmitted voice frame coding sequence is recovered after the voice data transmission is restored.
  • AMR adaptive multi-rate
  • one or more (excluding one) adaptive multi-rate (AMR) coded frames are transmitted to the transmission channel every 20 milliseconds, and part or all of the voice frame coding sequences that are buffered are processed.
  • AMR adaptive multi-rate
  • the buffer is interrupted by the scheduled high-priority logical channel to intercept the adaptive multi-rate (AMR) encoded frame on the voice logical channel.
  • AMR adaptive multi-rate
  • the cache is adaptive. Rate (AMR) coded frames are transmitted at more than one rate every 20 milliseconds, which solves the problem of such framed data being stolen by the logical channel priority. This is the benefit of this method.
  • AMR adaptive multi-rate
  • AMR adaptive multi-rate
  • the radio network controller (RNC) on the network side detects whether the received adaptive multi-rate (AMR) coded frame is a delayed frame.
  • One method of detection is to check the adaptive multi-rate (AMR) received every 20 milliseconds.
  • the coded frame once it is found that more than one frame is received within 20 milliseconds or a frame is received within 10 milliseconds, indicating that the delayed frame is received; another method of detecting is to send signaling to the radio access network.
  • a message indicating the starting frame number and the number of frames of the transmitted radio frame of a number of delayed frames.
  • a method for a Radio Network Controller (RNC) to transmit an adaptive multi-rate (AMR) coded frame with a delay flag to the core network is: placing a delay flag on the bearer Should be multi-rate (AMR) encoded frame core network - radio access network interface (lu) user plane frame extension field (spare extension).
  • RNC Radio Network Controller
  • AMR adaptive multi-rate
  • a discontinuous transmission scheme on the network side of the Universal Mobile Telecommunications System is: a method of generating and transmitting an adaptive multi-rate (AMR) coded frame on the network side of the Universal Mobile Telecommunications System (UMTS) as described above.
  • AMR adaptive multi-rate
  • the received voice frame coding sequence carried by the lu user plane frame sent by the core network is buffered in the buffer area, and after the pause is finished, the adaptive multi-rate (AMR) coding in the buffered voice frame coding sequence is scheduled.
  • AMR adaptive multi-rate
  • one or more (excluding one) adaptive multi-rate (AMR) coded frames are transmitted to the transmission channel every 20 milliseconds.
  • the technical solution for transmitting on the network side of the Universal Mobile Telecommunications System (UMTS) at the time of cell handover is: according to the discontinuous transmission method on the network side of the Universal Mobile Telecommunications System (UMTS), the paused radio frame transmission period is determined by the radio network controller Inter-cell handover period within (RNC).
  • RNC Radio Network Controller
  • the technical solution of the Universal Mobile Telecommunications System (UMTS) network side transmission when switching between Radio Network Controllers (RNCs) is: According to the discontinuous transmission method on the network side of the Universal Mobile Telecommunications System (UMTS), the suspended radio frame transmission The period is during the switching between radio network controllers (RNCs).
  • RNCs Radio Network Controllers
  • the technical solution for transmitting on the universal mobile communication system (UMTS) network side when the voice data is interrupted by the high priority logical channel is: according to the intermittent transmission method on the network side of the Universal Mobile Telecommunications System (UMTS), the pause wireless
  • the frame transmission period is caused by the failure to transmit those core network-radio access network interface (lu) user plane frames caused by the suspension of voice data transmission when the other logical channels are preferentially scheduled to be higher than the voice logical channel priority to the transmission channel.
  • the period of the adaptive multi-rate (AMR) encoded frame in the voice frame coding sequence is caused by the failure to transmit those core network-radio access network interface (lu) user plane frames caused by the suspension of voice data transmission when the other logical channels are preferentially scheduled to be higher than the voice logical channel priority to the transmission channel.
  • AMR delayed adaptive multi-rate
  • a delayed adaptive multi-rate (AMR) coded frame is generated, causing the radio network controller (RNC) transmitting the mobile station to exceed one voice frame coding sequence every 20 milliseconds.
  • the rate of transmission of voice data to the core network the core network will also transmit to the radio network controller (RNC) of the receiving mobile station at a rate of more than one voice frame coding sequence every 20 milliseconds, a universal mobile communication system that processes such frames
  • the transmission scheme of the UMTS) network side is: a method for generating and transmitting an adaptive multi-rate (AMR) coded frame on the network side of the Universal Mobile Telecommunications System (UMTS) as described above, and in a universal mobile communication system (UMTS) a method for determining, by a radio network controller (RNC), a code generation and transmission of a mode in an encoding command, the lu user plane frame transmitted by the core network to a radio network controller (RNC) carrying a voice frame coding sequence,
  • RNC radio network controller
  • AMR adaptive multi-rate
  • AMR adaptive multi-rate
  • TTI transmission time interval
  • AMR adaptive multi-rate
  • the voice data is interrupted by the high priority logical channel.
  • RNC Radio Network Controller
  • the delay of the voice is required to be controlled, so the buffer is stored in the radio network controller (RNC).
  • the number of voice frame coding sequences in the buffer area is limited. When the number of buffered voice frame coding sequences exceeds the lower limit of the buffer area of the destination mobile station, the buffered voice frame coding sequence is discarded.
  • the present invention enables an adaptive multi-rate (AMR) mode selection mechanism in the TFC selection phase, which reduces the loss of voice frames caused by the single adaptive multi-rate (AMR) mode and the TF mismatch in the TFC selection phase in the prior art.
  • the output of the adaptive multi-rate (AMR) encoder is multi-mode, and this multi-mode has a combination of transport channel formats to match.
  • the output of the multi-mode adaptive multi-rate (AMR) encoder in the method of the present invention can be used for abrupt changes in the effective transport channel format combination (TFC) caused by a sudden drop in the physical channel rate or scheduling of burst high priority logical channels.
  • TFC effective transport channel format combination
  • TFC effective transmission channel format combination
  • the adaptive multi-rate (AMR) encoder outputs a multi-mode adaptive multi-rate (AMR) coded frame in a first-in, first-out (FIFO) buffer, and the multi-mode has a transport channel format combination thereof.
  • Match Abrupt changes in the effective transport channel format combination (TFC) caused by a sudden drop in the physical channel rate, handover, or scheduling of bursty high priority logical channels, ie, the transport channel format combination that can be used in the Transport Channel Format Combination Set (TFCS) This includes the Transport Channel Format Combination (TFC) used by the mobile station before this.
  • TFC Transport Channel Format Combination
  • the output of the multi-mode adaptive multi-rate (AMR) encoder in the method of the present invention can be used to match the abrupt changes in the effective transport channel format combination (TFC), ie, using a new available transport channel format combination (TFC) ) to schedule the adaptive multi-rate (AMR) transmitted by the previous mobile station in the sequence of voice frames to be processed in the first-in, first-out (FIFO) buffer Adaptive multi-rate (AMR) coded frames of different modes of mode, thereby reducing frame loss of voice frames caused by sudden drops in physical channel rates, handover or scheduling of bursty high priority logical channels, compared to the prior art
  • the present invention enables the selection of the best transport channel format combination (TFC) for the adaptive multi-rate (AMR) mode of all Universal Mobile Telecommunications System (UMTS) and the radio resources of the mobile station in a shorter time.
  • the buffering mechanism of the present invention overcomes the limitation that an adaptive multi-rate (AMR) voice frame transmission or discarding must be completed every 20 milliseconds in the prior art, because delayed transmission can be achieved using the method of the present invention, thus making handover
  • the coded frames output by the adaptive multi-rate (AMR) encoder during the scheduling of the burst high-priority logical channel preemption can still be transmitted, and the prior art will discard these switched and scheduled burst high-priority logical channel preemptions.
  • An adaptive multi-rate (AMR) coded frame of a radio resource that is, an adaptive multi-rate (AMR) that occurs in a storage unit during handover and scheduling of burst high-priority logical channels to preempt wireless resources in the prior art.
  • the phenomenon that the encoded frame is refreshed without being read.
  • the voice frames affected by the scheduled burst high priority logical channels in the method of the present invention may be transmitted in a different mode than the voice frames adjacent thereto before being delayed, or delayed after a certain time. Sending does not cause discarding of voice frames. This is reflected in the fact that it can adjust the timing of the first-in, first-out (FIFO) cache read adaptive multi-rate (AMR) coded frame.
  • FIFO first-in, first-out
  • AMR adaptive multi-rate
  • 10 can be used.
  • the transmission format of the millisecond transmission time interval (TTI) combines the adaptive multi-rate (AMR) encoded frames transmitted in the first in first out (FIFO) buffer to reduce the time interval between the writing and reading.
  • the method for generating and transmitting adaptive multi-rate (AMR) coding maximizes the use of the bit rate provided by the physical channel to transmit voice data. This utilization is reflected in the 20 millisecond voice input. Select within a certain mode range and within a certain time range, and the adaptation of this choice to the physical channel.
  • AMR adaptive multi-rate
  • Figure 2 is a process diagram of an encoding module having an adaptive multi-rate (AMR) mode number of 2 in the encoding command of Figure 1. .
  • AMR adaptive multi-rate
  • Figure 3 is a process diagram of an encoding module having an adaptive multi-rate (AMR) mode number of 3 in the encoding command of Figure 1.
  • AMR adaptive multi-rate
  • FIG. 4 is a block diagram of an embodiment of a mobile station generating and transmitting adaptive multi-rate (AMR) coded frames in a buffered manner.
  • AMR adaptive multi-rate
  • Figure 5 is an interface block diagram of a first-in, first-out (FIFO) buffer for an adaptive multi-rate (AMR) encoder.
  • Figure 6 to Figure 10 are diagrams showing the processing of the voice frame coding sequence in the first in first out (FIFO) buffer during the period from 0 to 80 milliseconds shown in Table 1 by the mobile station;
  • FIFO first in first out
  • FIG. 6 is a schematic diagram of a zero millisecond first in first out (FIFO) buffer output adaptive multi-rate (AMR) coded frame
  • FIG. 7 is a schematic diagram of outputting an adaptive multi-rate (AMR) encoded frame in a 0 millisecond first in first out (FIFO) buffer
  • Figure 8 is a diagram showing an adaptive multi-rate (AMR) encoder outputting a sequence of voice frame codes to a first in first out (FIFO) buffer at 35 milliseconds;
  • AMR adaptive multi-rate
  • Figure 9 is an illustration of a 40 millisecond first-in, first-out (FIFO) buffer output adaptive multi-rate (AMR) coded frame;
  • Figure 10 is a schematic illustration of a 40 millisecond first-in, first-out (FIFO) buffer output adaptive multi-rate (AMR) coded frame.
  • FIFO first-in, first-out
  • AMR adaptive multi-rate
  • 11 is a block diagram of an embodiment of delay decoding by a mobile station.
  • FIG. 12 is an interface block diagram of a first-in, first-out (FIFO) buffer of an adaptive multi-rate (AMR) decoder.
  • 13 to FIG. 16 are schematic diagrams of a mobile station processing five consecutive adaptive multi-rate (AMR) coded frames;
  • FIG. 13 is a schematic diagram of transmitting a no-data (NO-DATA) frame to a first-in-first-out (FIFO) buffer;
  • 14 is a schematic diagram of a first-in-first-out (FIFO) buffer transmission adaptive multi-rate (AMR) frame to variable rate decoder after receiving a no-data (NO_DATA) frame;
  • Figure 15 is a schematic diagram of the first in first out (FIFO) buffer after receiving two 10 millisecond transmission time intervals ( ⁇ ) of adaptive multi-rate (AMR) frames;
  • Figure 16 is a diagram of a first-in, first-out (FIFO) buffer that deletes a no-data (NO-DATA) frame after receiving two 10 ms transmission time interval (TTI) adaptive multi-rate (AMR) frames.
  • FIFO first-in, first-out
  • FIG. 17 is a block diagram of an embodiment of a network side generating and transmitting an adaptive multi-rate (AMR) coded frame.
  • AMR adaptive multi-rate
  • Figure 18 is a block diagram of an embodiment of a network side transmitting an adaptive multi-rate (AMR) coded frame in an intermittent manner and a network side transmitting delayed adaptive multi-rate (AMR) coded frame.
  • AMR adaptive multi-rate
  • AMR delayed adaptive multi-rate
  • FIG 19 is a basic functional block diagram of a Universal Mobile Telecommunications System (UMTS) handset. detailed description
  • UMTS Universal Mobile Telecommunications System
  • Embodiment 1 Mobile Station Generation and Transmission of Adaptive Multi-Rate (AMR) Coded Frames
  • an adaptive multi-rate (AMR) encoder converts voice from sound to an electrical signal, and after filtering, is sampled to convert from an analog voice signal to a digital voice signal 1.
  • the encoding module encodes the digital voice signal 1 in a manner of 20 milliseconds one frame.
  • the encoding module generates one voice frame coding sequence 2 every 20 milliseconds.
  • Each voice frame coding sequence includes: mode indication, several adaptive multi-rates (AMR) A voice coded frame or an adaptive multi-rate (AMR) silence frame.
  • the mode indication gives the case of the voice frame coding sequence and its adaptive multi-rate (AMR) coded frame, SP, whether it is a valid voice frame coding sequence, and the adaptive multi-rate (AMR) coded frame in the voice frame coding sequence. Number and encoding mode for each frame.
  • the transport format combination selection module in the wireless interface functional unit uses the voice frame coding sequence 2 of the adaptive multi-rate (AMR) voice coder and The packet service data 4 and the signaling data 5 are inputs, a transport format combination is selected, and the transport format of the transport voice and the voice data transport block 6 corresponding to the format are determined according to the transport format combination.
  • the voice data transmission block 6 is an adaptive multi-rate (AMR) coded frame, and the adaptive multi-rate (AMR) coded frame is included in the voice frame coding sequence 2.
  • AMR adaptive multi-rate
  • the transport blocks of the corresponding packet service data 4 and the signaling data 5 output by the transport format combination selection module are the packet data transport block 8 and the signaling data transport block 7, respectively.
  • the other modules of the wireless interface function unit map the voice data transmission block 6, the packet data transmission block 8, and the signaling data transmission block 7 onto the physical channel for transmission.
  • the wireless interface function unit has a voice frame mode control module for outputting the mode selection signal 9 to the adaptive multi-rate (AMR) encoder, the mode selection signal 9 is output to the encoding module, and the mode selection signal 9 includes a plurality of adaptive multi-rates.
  • the mode selection signal 9 as an encoding command indicates that the encoding module should include a plurality of adaptive multi-rate (AMR) speech encoded frames when outputting non-silent frames, and indicate the mode of these frames.
  • Table 1 is an example of the composition of a voice frame coding sequence 2 and its bit number allocation.
  • the digital voice signal 1 is simultaneously output to the voice encoding function module 100 and the voice encoding module 101 with voice activation detection.
  • the voice encoding function module 100 of the voice activation detection has substantially the same structure as the corresponding portion of the Overview of audio processing fimctions of the Universal Mobile Telecommunications System (UMTS) standard TS26.071 (or TS 26.171). The difference is that the coding mode indication signal 17 output to the speech coding sub-module of the speech coding function module 100 with voice activation detection is shown in FIG.
  • UMTS Universal Mobile Telecommunications System
  • the voice activation detection module outputs the voice A voice activity detection Detector flag 10, a voice coding module of the voice coding function module 100 with voice activation detection outputs a voice coding frame 12, and the voice coding module 101 outputs a voice coding frame 19, and voice coding frames 12 and 19
  • the number of bits per frame depends on the coding mode indication signals 17 and 18, respectively, and the coding mode control signals 17 and 18 are two outputs of one mode one way in which the coding mode control module decomposes the two modes of the mode selection signal 9.
  • the discontinuous transmission and operation module outputs an adaptive multi-rate (AMR) frame type signal 11 to a multi-channel speech coding multiplexing module and a speech coding module, and an adaptive multi-rate (AMR) frame type signal 11 indicates: whether the information bit 14 is valid Adaptive multi-rate encoded frame, mode of adaptive multi-rate encoded frame, mode of the adaptive multi-rate encoded frame is a mode of a non-silent speech frame or a mode of a silent frame, when the mode of the adaptive multi-rate encoded frame is When the frame is silenced, the information bit 14 is the silence detection frame 13 output by the comfort noise transmitting module.
  • AMR adaptive multi-rate
  • the speech encoding module 101 outputs an adaptive multi-rate speech encoded frame 19 and its adaptive multi-rate (AMR) frame type signal 16, which represents the mode of the adaptive multi-rate speech encoded frame 19.
  • the multiplexed speech coding multiplexing module combines the information bits 14 from the discontinuous transmission and operation module and the adaptive multi-rate speech coding frame 19 into a speech frame coding sequence 2, the method of combining is: when adaptive multi-rate (AMR) frames When the type signal 11 indicates that the information bit 14 is invalid, the mode of the voice frame coding sequence 2 is set to be an invalid voice frame coding sequence; when the adaptive multi-rate (AMR) frame type signal 11 indicates that the information bit 14 is a silent frame, the voice is set.
  • AMR adaptive multi-rate
  • the mode of the frame coding sequence 2 is indicated as a silence frame, and the information bit 14 is placed in the voice frame coding sequence of the voice frame coding sequence 2; when the adaptive multi-rate (AMR) frame type signal 11 indicates that the information bit 14 is a non-silent frame, The information bits 14 and 19 are placed together in the voice frame coding sequence of the i-tonal frame coding sequence 2, while the mode indication of the voice frame coding sequence 2 is set to be indicated by the adaptive multi-rate (AMR) frame type signals 11 and 16. mode.
  • AMR adaptive multi-rate
  • Table 2 shows the composition of information bits 14 and adaptive multi-rate speech encoded non-silent frames 19 generated by the encoding module when the number of adaptive multi-rate (AMR) modes in an encoding command is 2, packet service data 4 and signaling data 5
  • AMR adaptive multi-rate
  • Transport channel 1 2 3 1 2 3 5 4 Logical channel carrying user data
  • Table 3 shows the attributes and parameters of each transport channel in Table 2, in particular the configured transport format (TF).
  • the configured transport format supports adaptive multi-rate (AMR) voice coder modes of 12.2 kbps, 7.4 kbps and 4.75 kbps.
  • the voice frame mode control part of the wireless interface function unit sends out to the AMR voice coder.
  • the mode selection signal 9 may include any two of the above three modes, for example, (12.2 kbps, 4.75 bps).
  • Table 4 gives the meaning of all combinations of transport formats, that is, the user data that the transport format combination is used to transmit.
  • Table 4 Transport Channel TrChl TrCh2 TrCh3 TrCh4 TrCh5 crown,
  • TFI 0 0 0 0 0 0 does not send data
  • the radio interface functional unit is to process voice data of 12.2 kbps and 4.75 bps in the voice frame coding sequence 2, if There is no valid data in the output of the transport channel signaling data 5 and the packet data 6 to be scheduled, and the transport format combination (2, 1, 1 , 0, 0) is a valid combination, and the wireless interface functional unit can transmit the mode at 12.2 kbps.
  • Voice frame if there is valid data to be transmitted in the transmission channel signaling data 5, there is no data in the packet data, and the transmission format combination (2, 1, 1, 0, 1) is limited due to the limitation of the physical channel bandwidth. It is an invalid combination, and the transport format combination (4, 3, 0, 0, 1) is not effectively limited by the bandwidth limitation of the physical channel.
  • the wireless interface functional unit can simultaneously transmit the voice frame and signaling with the mode of 4.75 kbps. .
  • the radio interface functional unit is to process voice data of 12.2 kbps and 4.75 bps in the voice frame coding sequence 2, and the configuration of the physical channel changes if J3 ⁇ 4 , causing the bandwidth of the channel to decrease such that the transport format combination (2, 1, 1, 0, 0) becomes an invalid combination, and the transport format combination (3, 2, 0, 0, 0) and (4, 3, 0, 0, 0) The bandwidth limit without the physical channel is a valid combination.
  • the wireless interface function unit transmits a voice frame of 4-75 kbps mode when only voice data is available, and transmits the content to the AMR voice coder (7.4 kbps).
  • Mode selection signal 9 of 4.75 bps after changing to 7.4 kbps and 4.75 bps of voice data in the voice frame coding sequence 2, the wireless interface function only when voice data is available The unit can transmit a voice frame of mode 7.4 kbps.
  • FIG. 3 is a schematic diagram of processing of an encoding module having a number of adaptive multi-rate (AMR) modes of 3 included in the mode selection signal 9.
  • the digital voice signal 1 simultaneously transmits a voice encoding function module 100 with a voice activation detection, and a voice encoding module 101.
  • the speech encoding module 102 outputs, the voice encoding function module 100 with voice activation detection is in the Overview of audio processing functions of the Universal Mobile Telecommunications System (UMTS) standard TS26.071 (or TS 26.171).
  • UMTS Universal Mobile Telecommunications System
  • TS26.071 or TS 26.171
  • the structure of the corresponding part is basically the same, the difference is that the coding mode indication signal 17 outputted to the speech coding module is shown in FIG.
  • the detected speech encoding function module 100 has a speech encoding sub-module that outputs a speech encoding frame 12, and the speech encoding module 101 and the speech encoding module 102 output a separate LI that is a speech encoding frame 19 and 21, and each of the speech encoding frames 12, 19, and 21
  • the number of bits depends on the coding mode indication signals 17, 18 and 15, respectively.
  • a signal indicative of formula 17, 18 and 15 are the encoding mode selected in the mode control module 9 3 3 mode signal into an output channel pattern 1.
  • the discontinuous transmission and operation module outputs an adaptive multi-rate (AMR) frame type signal 11 to a multi-channel speech coding multiplexing module and a speech coding module, and an adaptive multi-rate (AMR) frame type signal 11 indicates: whether the information bit 14 is valid Adaptive multi-rate coded frame, mode of adaptive multi-rate coded frame, mode of the adaptive multi-rate coded frame is a mode of a voice frame or a mode of a silence frame; when the mode of the adaptive multi-rate coded frame is silent At the time of frame, the information bit 14 is the silence detection frame 13 output by the comfort noise transmitting module.
  • AMR adaptive multi-rate
  • the speech encoding module 101 and the speech encoding module 102 output adaptive multirate speech encodings 19 and 21 and respective adaptive multirate (AMR) frame type signals 16 and 20, respectively, which represent adaptive multirate speech encoding frames 19 and 21, respectively.
  • the multiplexed speech coding multiplexing module combines the information bits 14 from the discontinuous transmission and operation modules with the adaptive multi-rate speech coding frames 19 and 21 into a speech frame coding sequence 2, the combining method being: when adaptive multi-rate (AMR) When the frame type signal 11 indicates that the information bit 14 is invalid, the mode of the voice ⁇ code sequence 2 is set to be an invalid voice frame code sequence; when the adaptive multi-rate (AMR) frame type signal 11 indicates that the information bit 14 is a silence frame, The mode of the voice frame coding sequence 2 is indicated as a silence frame, and the information fc is placed in the voice frame coding sequence of the voice frame coding sequence 2; when the adaptive multi-rate (AMR) frame type signal 11 indicates that the information bit 14 is
  • Embodiment 2 - The mobile station transmits an adaptive multi-rate (AMR) coded frame in an intermittent manner
  • AMR adaptive multi-rate
  • FIG. 4 An embodiment of a method for generating and transmitting an adaptive multi-rate (AMR) voice frame with a buffered mobile station is shown in FIG. 4.
  • the difference between FIG. 4 and FIG. 1 is that the first-in first-out memory (FIFO) is combined with the transport format.
  • the ED first-in memory read-out control component replaces the transport format combination selection component of FIG.
  • the output voice frame coding sequence 2 of the encoding module is to the first in first out memory (FIFO), the first in first out memory (FIFO) buffers the voice frame code sequence, and outputs the storage status flag 25, and the storage status flag 25 indicates: whether there is any unread The voice frame coding sequence, and the number of these unread voice frame coding sequences.
  • Transport format combination selects first-in-first-out storage read control
  • the component outputs a read command 26, and the read command 26 causes the first in first out memory (FIFO) to output a live frame of the sequence 3 .
  • the transport format combination selects the first in first out memory read control component to check the number of voice fe3 ⁇ 4 code sequences stored in the first in first out memory (FIFO) given by the storage status flag 25. Whether the limit value is exceeded, when it is exceeded, the voice frame coding sequence with timeout storage is determined, and then the time-out voice frame coding sequence is taken out from the first-in first-out memory (FIFO) by the read command 26, and can be discarded by delay control.
  • the above limit value is determined to the extent.
  • Table 5 shows the configuration of an exemplary transport channel in the course of operation, giving the attributes and parameters of each transport channel, in particular the transport format (TF) D transmission corresponding to the transport format identifier (TFI) of each transport channel.
  • TTI Time interval
  • the voice frame coding sequence stored in the first-in-first-out memory (FIFO) of the radio interface function fetcher contains voices of 12.2 kbps and 4.75 bps modes.
  • Data if there is valid data to be transmitted in the transmission channel signaling data 5, there is no valid data in the dividend data, and the transmission format combination (2, 1, 1, 0, 1) is none due to the limitation of the physical channel bandwidth.
  • the wireless interface function unit can use the transmission interface format (0, 0, 0, 0, 1) after transmitting the signaling data in a 20 millisecond transmission day interval, the wireless interface function unit can use (4, 3 , 0, 0, 0)
  • the buffered voice coded frame with the mode of 4.75 kbps is transmitted in two consecutive 10 millisecond transmission time intervals. The previous one of the two is delayed due to preemption, and the latter is undelayed. In this way, the voice data temporarily suspended by the signaling data is delayed to be transmitted without affecting the subsequent transmission of the voice frame. If the above preemption is a silent start frame, the method of transmitting the silenced start frame can be sent (5, 0, 0, 0, 0) to delay transmission.
  • the time limit of the first-in first-out memory is set to 10 mobile stations with a length of 20 milliseconds.
  • the wireless interface function unit cannot send the wireless frame.
  • the switch completes the wireless interface function unit,
  • eight voice frame coding sequences are stored in the first in first out memory (FIFO) during the switching. These voice frame coding sequences are the same as the previous example.
  • the mode selection signal 9 contains the mode (12.2 kbps, 4.75 bps).
  • the wireless interface function unit can transmit (4, 3, 0, 0, 1) an adaptive voice coded frame of mode 4.75 kbps and transmit 16 (8+4+2+1+1) from the current frame.
  • the delayed voice frame coding sequence stored in the FIFO for more than 20 milliseconds can be recovered after 20 milliseconds of the voice coded frame of mode 12.2 kbps.
  • the combination of the voice frame mode control portion and the transport format combination in FIG. 4 selects the transport format combination in the FIFO read control portion to be implemented on the central processing unit, and selects the transport format combination to select the FIFO memory read control portion.
  • the FIFO read control is placed in the channel encoder to implement an embodiment of the interface buffered in the mobile station shown in FIG.
  • the first in first out (FIFO) buffer is between the adaptive multi-rate (AMR) encoder and the channel encoder, and the adaptive multi-rate (AMR) encoder outputs one to the first in first out (FIFO) buffer every 20 milliseconds.
  • the voice frame coding sequence, the first in first out (FIFO) buffer in the figure is used to store the voice frame coding sequence, and the central processor reads out the type of the voice frame coding sequence to be processed through the interface 29 shown in the figure, the central processor
  • An encoding command comprising a plurality of adaptive multi-rate (AMR) modes can be transmitted to the adaptive multi-rate (AMR) encoder via the interface 28 shown in the figure.
  • Table 6 gives an example of a combination of transport channel formats based on the sequence of voice frame codes written in the first-in, first-out (FIFO) buffer during the period from 0 to 80 milliseconds in Table 6.
  • TFC Transport Channel Format Combination
  • FIFO milliseconds buffer code sequence and its type.
  • AMR Multi-rate
  • TTI frame code sequence
  • mode 1+ mode 7 (81,103,60), 20 ms mode 7
  • mode 1+ mode 2 (55, 63), 10 ms mode 2
  • FIG. 8 shows the 0 millisecond time in the first in first out (FIFO) buffer stored in the voice frame coding sequence 305, as shown in Table 6, this
  • the sequence of the speech frame to be processed read by the central processing unit through the interface 29 shown in the figure is a valid voice frame coding sequence 305 of the type 1 + mode 7, the combination of the transmission channel format on the central processing unit.
  • the result of the (TFC) selection is a combination of a transmission time interval (TTI) of 20 milliseconds, which contains three formats for the voice transmission channel, one format being 1 X 89 bits and the other being 1 X 103 bits. There is also a 1 X 60 bit.
  • TTI transmission time interval
  • the adaptive multi-rate (AMR) frame of mode 7 in the voice frame coding sequence 305 is to be placed on the transmission channel, 501 in Figure 7 is the adaptive multi-rate (AMR) frame of mode 7.
  • the specific operation is such that the central processor issues an instruction to the channel coder via the interface 27 to encode according to a combination of transmission formats including 3 X 89 bits, 1 X 103 bits and 1 X 60 bits. It will be operative to read the adaptive multi-rate (AMR) encoded frame 501 of mode 7 in the first in first out (FIFO) buffered speech frame encoding sequence 305, which shifts the speech frame encoding sequence 305 out of the first in first out (FIFO) Cache.
  • FIFO first in first out
  • Table 20 shows that at 20 milliseconds, the central processor reads out the voice frame coding sequence to be processed by the interface 29 shown in the figure as a valid voice frame coding sequence 304 of the type 1 + mode 7, transmission channel format.
  • the result of the combination (TFC) selection is that there is no transport format combination that can transmit voice. There are many reasons for this (physical channel change, high priority logical channel, and handover), so this is not the first in first out (FIFO).
  • the cache reads the voice frame encoding sequence 304.
  • Figure 8 shows a voice frame encoding sequence 304 stored in a first in first out (FIFO) buffer at 35 milliseconds, while an adaptive multi-rate (AMR) encoder outputs a voice frame encoding sequence 303, a voice frame to a first in first out (FIFO) buffer.
  • the type of the coding sequence 303 is mode 1 + mode 2, which is changed compared to the previous speech frame coding sequence 304, i.e., the mode change in the coding command of the central processor is reflected in the speech frame coding sequence 303.
  • Figure 9 shows the voice frame encoding sequences 304 and 303 stored in the first in first out (FIFO) buffer at 40 milliseconds, as shown in Table 6, at this time because of the number of voice frame encoding sequences stored in the first in first out (FIFO) buffer.
  • a transmission format combination exceeding '1, preferably 10 milliseconds, of transmission time interval (TTI), at which point the result of the Transport Channel Format Combination (TFC) selection is a combination of a transmission time interval ( ⁇ ) of 10 milliseconds, which is included for
  • TTI transmission time interval
  • TFC Transport Channel Format Combination
  • 401 in FIG. 10 is the adaptive multi-rate (AMR) frame of the mode 1, and the specific operation is such that the central processor sends the channel encoder through the interface 27 according to the two of the X X49 bits and the 1 X 54 bits.
  • Voice transmission format transmission The format combines the encoded instructions, which will cause it to issue an operation of reading the adaptive multi-rate (AMR) encoded frame 401 of mode 1 in the first in first out (FIFO) buffered speech frame encoding sequence 304, which will sequence the speech frame encoding 304, remove the first in first out (FIFO) cache.
  • AMR adaptive multi-rate
  • the voice frame coding sequence 302 written at 55 milliseconds as shown in Table 6 is not read until 70 milliseconds, the write and read time intervals exceed 10 milliseconds, since the Transport Channel Format Combination (TFC) selection can be used to shorten the The write and read time intervals are described, so the result of the Transmission Channel Format Combination (TFC) selection at 70 milliseconds is the 10 ms transmission time interval (the combination of the transport format of the TTD, ie the table shown in the table "(55, 63), 10 milliseconds", this will result in a significant reduction in the time interval between the read operation at 80 milliseconds and the write operation at 75 milliseconds compared to the last pair of operations.
  • TFC Transmission Channel Format Combination
  • Embodiment 3 Mobile Station Delay Adaptive Multi-Rate (AMR) Decoding
  • the mobile station's receive source control rate processor (Rx SCR handler) is associated with the radio interface functional unit through a first in first out memory (FIFO), 32, 33 and 34 are first in first out memory (FIFO) directions, respectively.
  • the receiving bit of the mobile station controls the information bits, mode indication and reception type of each received frame output by the Rx SCR handler, 37, 38 and 39 are respectively the wireless interface function unit to the first in first out memory (FIFO)
  • the information bits, mode indication and reception type of each received frame are output.
  • the mode indication gives the adaptive multi-rate of the received frame (AMR mode, the reception type is shown in Table 7.
  • the first in first out memory (FIFO) will be the wireless interface function.
  • Each adaptive multi-rate (AMR) receive frame sent by the unit is sequentially cached, and the above information bits, mode indication and reception type are saved together during buffering.
  • the cache status flag 30 indicates: whether there is an unread adaptive Multi-rate (AMR) received frames, and the number of these unread adaptive multi-rate (AMR) received frames.
  • AMR adaptive Multi-rate
  • the R SCR handler does not immediately read and decode the received unread received frame, but is not read in the first in first out memory (FIFO).
  • FIFO first in first out memory
  • the mobile station's receive source control rate processor SCRhandler begins to read an adaptive from every 20 milliseconds.
  • the multi-rate encoded frame is read by issuing a read command 31 to the first in first out memory (FIFO).
  • the first in first out memory (FIFO) output receives the lost status flag 35, which gives the mobile station in speech (SPEECH) mode.
  • the number of actively added receive lost frames (of type NO_DATA_SPEECH).
  • the value given by Receive Loss Status Flag 35 indicates that the value added in voice (SPEECH) mode stored in the First In First Out Memory (FIFO) is actively added.
  • the wireless interface function unit no longer adds the received loss to the first-in-first-out memory (FIFO) output voice (SPEECH) mode. Frame loss.
  • the wireless interface function unit If the wireless interface function unit outputs a receive frame to the first in first out memory (FIFO) at a rate of more than 1 frame every 20 milliseconds, the wireless interface function unit sends a delete command 36 to the first in first out memory (FIFO) to be first in, first out. Receive lost frames deleted in voice (SPEECH) mode stored in the memory (FIFO).
  • SPEECH Receive lost frames deleted in voice
  • Table 8 shows a series of operations on the received frame delayed by the mobile station.
  • the first-in-first-out memory (FIFO) buffer has a lower limit of 4, and its speech (SPEECH) mode. Add and receive The specified limit value for the number of lost frames is 2.
  • the processing of the received frames in the first 20 milliseconds to the eighth 20 millisecond time period of each unit in FIG. 11 is listed in the table.
  • SPEECH GOOD Empty SPEECH mode
  • wireless interface The empty function unit writes the first frame to the first-in first-out memory, and the Rx SCR handler does not read the frame.
  • the wireless interface function unit writes the empty second frame to the FIFO memory, and the Rx SCR handler still does not read the frame.
  • the wireless interface function unit writes the third frame of the third frame to the FIFO storage. Empty, Rx SCR handler still does not read frames
  • Fourth frame second frame first frame mobile station is still in SPEECH mode
  • the wireless interface function unit writes the fourth frame of H fourth frame, the number of the first-in first-out memory is up to 4, and the Rx empty SCR handler starts reading every 20 milliseconds.
  • the wireless interface function unit writes the sixth frame, the sixth frame, the fifth and sixth frames, deletes
  • SPEECH GOOD Empty Fourth Empty Frame in FIFO Memory Receive Lost Frame Added in SPEECH Mode
  • Seventh frame, fifth frame, third frame, mobile station is still in SPEECH mode
  • the wireless interface function unit writes the seventh frame of H seventh frame
  • the eighth frame, the sixth frame, the fifth frame, the mobile station is still in the SPEECH mode.
  • NO-DATA-SPEEC The eighth frame type, the first-in first-out memory has been empty. There are two received loss frames added in the SPEECH mode, and the ninth frame of the ninth frame added in the SPEECH mode is no longer written.
  • the eleventh frame tenth frame wireless interface function unit puts the tenth
  • SPEECH GOOD
  • the eighth and eleventh frames are written to the eleventh frame in the empty SPEECH mode.
  • SPEECH GOOD receives the lost frame in front of the frame, deletes the seventh frame in the FIFO memory, adds the received loss frame in SPEECH mode, and the R SCR handler reads the tenth frame.
  • SPEECH-GOOD writes the thirteenth frame two and thirteenth frames, deletes the eighth SPEECH-GOOD frame in the thirteenth frame empty first-in first-out memory, the received lost frame added in the SPEECH mode, and the Rx SCR handler reads the first ⁇ —frame
  • SPEECH—GOOD is written in the fourteenth frame and the fifteenth frame. Because the fifteenth frame is not preceded by the SPEECH GOOD empty received loss frame in SPEECH mode, there is no delete operation, and the Rx SCR handler reads the first. Twelve Frames Figure 12 shows a block diagram of the above-described delay decoding method.
  • the radio interface function in Figure 11 is implemented in the channel decoder and the central processor.
  • the mobile station receives the source control rate processor and puts it on.
  • the variable rate decoder and the central processor are implemented.
  • the first in first out (FIFO) buffer is between the variable rate decoder and the channel decoder, the channel decoder performs decoding operations at 10 millisecond frame timing, and the central processor receives the adaptive multi-rate generated by the channel decoder via interface 54 ( AMR) frame message, the central processor can send an instruction to the channel decoder to output an adaptive multi-rate (AMR) frame to the first in first out (FIFO) buffer via interface 54; the central processor can read the first in first out through interface 53 (FIFO) The length of the adaptive multi-rate (AMR) encoded frame queue stored in the buffer and the type of these encoded frames. Every 20 milliseconds, the central processor issues a delete to the first in first out (FIFO) buffer through interface 53. The central processor may issue an instruction to read the adaptive multi-rate (AMR) frame to the variable rate decoder via interface 58.
  • AMR adaptive multi-rate
  • the radio frame of the (AMR) frame transmits an unadaptive multi-rate (AMR) frame indication to the central processor via interface 54, and the central processor sends an output no data (N0JMTA) frame 52 to the channel decoder via interface 54 to first in first out.
  • AMR unadaptive multi-rate
  • N0JMTA output no data
  • FIFO cached instructions
  • AMR adaptive multi-rate
  • AMR adaptive multi-rate
  • the first in first out (FIFO) buffer reads the instructions to the adaptive multi-rate (AMR) decoder, as shown in Figure 14, after receiving the instruction, the adaptive multi-rate (AMR) decoder is from the first in first out (FIFO)
  • An adaptive multi-rate (AMR) encoded frame 56 read out of the buffer.
  • the next two 10 millisecond frame timing channel decoders decode two adaptive multi-rate (AMR) frames 51 and 50 and pass through interface 54 to the central processor after each adaptive multi-rate (AMR) frame decoding is completed.
  • the transmit generates an adaptive multi-rate (AMR) frame message, and each time the message is received, the central processor sends an adaptive multi-rate (AMR) frame to the first in first out (FIFO) buffer via the interface 54 to the channel decoder.
  • Figure 15 shows the situation of frames stored in a first in first out (FIFO) buffer after receiving these two adaptive multi-rate (AMR) frames.
  • the central processing unit acquires a first in first out (FIFO) buffer through the interface 53 to store information of the no data (NO-DATA) frame 52, issues an instruction to delete the no data (NO-DATA) frame, and executes the first in first out after the instruction.
  • FIFO first in first out
  • the situation of the frames stored in the buffer is as shown in FIG. 16.
  • Embodiment 4 Network Side Generation and Transmission of Adaptive Multi-Rate (AMR) Coded Frames
  • a transcoder (TC) speech encoded signal 41 is transcoded to produce a speech frame encoding sequence 42, each speech frame encoding sequence comprising a number of adaptive multi-rate (AMR) speech encodings.
  • a frame or an adaptive multi-rate (AMR) silence frame or a no-data (NO-DATA) type frame, each frame in the voice frame coding sequence 42 includes not only information bits of an adaptive multi-rate (AMR) core frame.
  • encoder cyclic redundancy check (CRC:) frame type, quality indication, and mode indication.
  • the voice frame coding sequence 42 generated by the pattern converter (TC) is processed by the Iu interface function unit to form an Iu user plane frame 43 and input to the radio network controller (RNC), and then restored to a voice frame by the Iu interface function unit.
  • the code sequence 42 is then output to the transport format combination selection unit, and the frame type of each frame in the voice frame coding sequence 42 indicates whether the frame is a voice frame or a silence frame or no data.
  • the mode indication of each frame in the voice frame coding sequence 42 gives the coding mode of the frame.
  • the transport format combination selection module in the radio network controller (RNC) takes as input a voice frame coding sequence 42, packet service data 44, and signaling data 45, and the transport format combination selection module selects a transport format combination, and combines according to the transport format. Determine the transport format of the transmitted voice and the corresponding output transport block.
  • the frame in the voice frame coding sequence 42 is a voice frame or a silence frame instead of a no-data (NO-DATA) type frame
  • the corresponding transport block is an adaptive multi-rate.
  • AMR adaptive multi-rate
  • AMR adaptive multi-rate
  • AMR adaptive multi-rate
  • the corresponding transport blocks of the packet service data 44 and the signaling data 45 are a packet data transport block 48 and a signaling data transport block 47, respectively.
  • the other units of the Radio Network Controller (RNC) map the voice data transport block 46, the packet data transport block 48, and the signaling data transport block 47 onto the physical channel for transmission.
  • Radio Network Controller (RNC) Media Gateway to the Core Network
  • the rate control unit of the media gateway (MGW) generates a mode selection signal 40 indicating a plurality of adaptive multi-rate (AMR) voice coding modes according to the RFCI-RAB sub-Flow Combination Indicator (RFCI-RAB sub-Flow Combination Indicator).
  • the mode select signal 40 is output to a pattern converter (TC) specifying a pattern of a plurality of adaptive multi-rate (AMR) coded frames that should be included in the sequence of speech encoded frames 42 output by the pattern converter (TC).
  • Radio access bearer substream combination indication (RFCI)
  • RFCI Radio Access Bearer Substream Combination
  • Table 9 is an example of a Radio Access Bearer Substream Combination (RFC) used by a Radio Network Controller (RNC) to transmit a voice frame coding sequence to a core network and its Radio Access Bearer Subflow Group Indicator (RFCI) values, which are also The part of the core network-radio access network interface user plane (Iu UP) initialization process that needs to be sent during Iu UP initialization.
  • RRC Radio Access Bearer Substream Combination
  • RNC Radio Network Controller
  • RFCI Radio Access Bearer Subflow Group Indicator
  • the numbering identifier (RFCI n indicator) of the radio access bearer substream combination indication using the core network-line access network interface (Iu) user plane rate control frame 49 is given to the core network.
  • the media gateway (MGW) issues an indication corresponding to the RFC, and the rate control portion determines a plurality of adaptive multi-rate (AMR) coding modes according to the indication, and outputs a mode selection including the plurality of adaptive multi-rate (AMR) coding modes.
  • AMR adaptive multi-rate
  • the Access Bearer Substream Combination Indicator carries the frames in the voice frame encoding sequence 42.
  • Embodiment 5 The network side transmits an adaptive multi-rate (AMR) coded frame in an intermittent manner
  • AMR adaptive multi-rate
  • the scheme of FIG. 18 is a modification of FIG. 17, which differs from FIG. 17 in that a FIFO is added and a FIFO read control component is selected in combination with a transport format instead of FIG.
  • the transport format combination selects the components.
  • the voice frame coding sequence 42 outputted by the pattern converter is processed as shown in FIG. 17, and is processed by the Iu interface function unit to form an Iu user plane frame 43 and input to the radio network controller (RNC), and then processed by the Iu interface function unit.
  • RNC radio network controller
  • the transport format combination selects the first in first out memory read control unit output read command 422, and the read command 422 makes the advanced The first-out memory (FIFO) outputs a voice frame coding sequence 420.
  • the first in first out memory read control component can read and discard the voice frame encoding sequence from the first in first out memory (FIFO) using the read command 422.
  • Table 11 shows the configuration of an exemplary transport channel in the working process of the embodiment, giving the attributes and parameters of each transport channel, in particular the transport format (TF) corresponding to the transport format identifier (TFI) of each transport channel. And transmission time interval ( ⁇ ).
  • Table 9 is used as an example of a Radio Access Bearer Substream Combination (RFC) and its Radio Access Bearer Substream Combination Indicator (RFCI) value, when the Core Network-Radio Access Network Interface (Iu) User Plane Rate Control Frame 49
  • the sequence identifier (RFCI n indicator) indicated by the radio access bearer substream combination is (0, 1, 2, 4, 6), so that the mode selection signal 40 output by the rate control unit includes a mode (12.2 kbps, 4.75 bps).
  • the core network transmits the voice frame coding sequence 42 using the RFCI with a value of 6 in the core network-radio access network interface (Iu) user plane frame, and the radio network controller (RNC) is stored in the first in first out memory (FIFO).
  • the voice frame coding sequence contains voice data in the 12.2 kbps and 4.75 bps modes. If there is valid data to be transmitted in the transmission channel signaling data 5, there is no valid data in the packet data, and due to the limitation of the physical channel bandwidth.
  • the transport format combination (2, 1, 1, 0, 1) is an invalid combination, so that the radio interface function unit sends the message with a transport format combination (0, 0, 0, 0, 1) within a 20 ms transmission time interval.
  • the wireless interface function unit can use (4, 3, 0, 0, 0) to transmit a voice frame of 4.75 kbps in consecutive 2 10 millisecond transmission time intervals, so that the voice is suspended due to the preemption of the signaling data.
  • the data is delayed in transmission without affecting the subsequent transmission of voice frames.
  • the radio network controller cannot transmit the radio frame when the handover occurs, and the radio network controller receives a total of 8 voice frame coding sequences from the core network during the handover, the wireless network The controller determines 5 (4+1) as the timeout parameter, and discards the timeout sequence when the stored status flag 421 gives the number of stored voice frame coding sequences greater than 5, and these voice frame coding sequences are the same as the previous example, ( 12.2 Kbps, 4.75bps) mode, after the switch is completed, the wireless interface function unit can use (4, 3, 0, 0, 0) to transmit the pattern in the sequence of voice coded frames during the switching interval of 5 consecutive 10 milliseconds.
  • Embodiment 6 Network side transmission delayed adaptive multi-rate (AMR) coded frame
  • the embodiment 5 indicated in FIG. 18 can also be used for processing the core network to transmit a sequence of voice coded frames with delay flags to the radio network controller (RC), and the delay flag can be placed on the core network-radio access network interface (Iu) user.
  • the sequence of voice coded frames with delay flags is caused by the delayed adaptive multi-rate voice coded frame transmitted by the mobile station at the transmitting end.
  • the mobile station at the transmitting end is transmitting due to handover.
  • a plurality of voice frame coding sequences are accumulated in the buffer area, so that the adaptive multi-rate voice coded frames in the delayed voice frame coding sequences are transmitted after the handover is completed.
  • a sequence of voice coded frames with a delay flag always arrives at the Radio Network Controller (RNC) with other coded frame sequences within 20 milliseconds, so the Radio Network Controller (RC) does not send a single delay flag within 20 milliseconds.
  • the AMR encoded frame schedules the speech encoded frames with delay flags on the transport channel in a manner that multiple frames are transmitted at a transmission time of 20 milliseconds each.
  • Table 12 shows the configuration of an exemplary transport channel in the working process of the embodiment, giving the attributes and parameters of each transport channel, in particular the transport format (TF) corresponding to the transport format identifier (TFI) of each transport channel. And transmission time interval ( ⁇ ).
  • Table 13 is an example of scheduling a voice coded frame to a transmission channel made by an embodiment during operation.

Abstract

L'invention concerne une méthode pour un codage multidébit adaptatif (AMR) et pour un transfert de paroles dans un système universel de télécommunication mobile (UMTS). L'invention concerne également une station mobile associée permettant un réglage AMR homogène. Une trame codée AMR d'un certain mode est sélectionnée à partir d'une trame codée AMR multimode, puis est transmise, que ce soit du côté de la station mobile ou du réseau, en fonction de la trame codée AMR multimode générée à partir des paroles codées par des modes multiples dans un ordre de codage, et lors du déploiement d'une trame de paroles sur un canal de transfert. Le côté réseau peut mettre en oeuvre l'ordre de codage à l'aide de la règle de l'interface de réseau d'accès radio/réseau central contrôlant le mode de codage multidébit de l'invention. Selon la méthode de l'invention, la mise en tampon de la trame codée AMR pendant la transmission, c'est-à-dire, dans le tampon premier arrivé/premier sorti (FIFO) de configuration de station mobile relié à la sortie du codeur de paroles adaptatif, peut permettre de ne pas détruire les trames codées AMR retardées, qui n'ont pas été temporairement transmises par un canal radio, et ces trames retardées sont transmises plus rapidement, après la récupération du canal radio.
PCT/CN2005/001803 2004-11-11 2005-10-31 Methode et dispositif pour un codage multidebit adaptatif et pour un transfert de paroles WO2006050657A1 (fr)

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CNB2004100680567A CN1312946C (zh) 2004-11-11 2004-11-11 话音的自适应多速率编码和传输方法
CN200410068056.7 2004-11-11
CN200510024126.3 2005-03-01
CN2005100241263A CN1829343B (zh) 2005-03-01 2005-03-01 带有自适应多速率编码帧缓存的移动台

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WO2010145301A1 (fr) * 2009-09-16 2010-12-23 中兴通讯股份有限公司 Procédé et appareil de réglage adaptatif multidébit

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WO2001052467A1 (fr) * 2000-01-10 2001-07-19 Qualcomm Incorporated Procede et appareil de prise en charge de donnees adaptatives a debits multiples (amr) dans un systeme de communications amcr
CN1545778A (zh) * 2001-08-27 2004-11-10 ��˹��ŵ�� 在半速率信道上传递自适应多速率信令帧的方法和系统

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WO2001052467A1 (fr) * 2000-01-10 2001-07-19 Qualcomm Incorporated Procede et appareil de prise en charge de donnees adaptatives a debits multiples (amr) dans un systeme de communications amcr
CN1545778A (zh) * 2001-08-27 2004-11-10 ��˹��ŵ�� 在半速率信道上传递自适应多速率信令帧的方法和系统

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WO2010145301A1 (fr) * 2009-09-16 2010-12-23 中兴通讯股份有限公司 Procédé et appareil de réglage adaptatif multidébit

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