CN102667925B - Codec rate adaptation for radio channel rate change - Google Patents
Codec rate adaptation for radio channel rate change Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
- H04W28/22—Negotiating communication rate
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- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0014—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the source coding
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- H—ELECTRICITY
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Abstract
Speech signals to be sent between a first node and a second node via a wireless communication system are Adaptive Multi-Rate (AMR) encoded. A need to change the first node's first data transmission rate over a radio interface to a second different data transmission rate is determined. A new AMR source bit rate is then determined for both nodes. Information is sent to the second node, in advance of changing the data transmission rate over the radio interface, requesting the second node to change towards the new AMR source bit rate. After a predetermined time period sufficient for the second node to change from the current AMR source bit rate to the new AMR source bit rate expires or after the second node indicates a change to the new AMR source bit rate, the first node starts transmitting at the second data transmission rate over the radio interface.
Description
Technical field
Technical field relates to mobile radio telecommunications, and relates to particularly the codec rate adaptation when needing wireless channel speed to change.
Background technology
Recently, because flexibility and the widespread deployment of Internet Protocol (IP) technology have been considered to transmit solution for the IP of the third generation (3G) mobile communications network.For example, the 8th edition 3GPP plans to use IP (AoIP) agreement [3GPP TS 48.008] and AoIP user plane transfer mechanism [3GPP TS 48.103] to support the user plane on the A interface between wireless access network and core net.AoIP allows the code Changer Device can only be positioned at for example, situation in core net (, mobile gateway (MGw)), can not obtain the code converter resource in wireless access network in this case.The advantage of AoIP is: to carry out possibility and the high probability of voice call without code converter operator scheme (TrFO).AoIP and adaptive voice coding (as, self-adapting multi-rate narrowband (AMR-NB)) and the ability operated on the audio coder & decoder (codec) bit rate of wide region together, can use whole potentiality of the gsm wireless network with full rate and half rate.
The adaptive voice coding, as adaptive multi-rate (AMR), can change for (as adaptive wireless quality, the load situation in adaptation network, and the width of adaptive local and remote wave point) for various reasons the bit rate of voice codec.Guaranteed that for the protocol enhancement of above-mentioned AoIP end-to-end codec negotiation occurs in the initial call foundation between local mobile wireless node and long distance wireless node, even and when moving due to mobile wireless node, need when switching or the RRM (RRM) in the wireless network codec rate in must adaptive mobile wireless node when adapting to current wireless condition and/or current wireless resource scenarios, still maintain the TrFO pattern.If RRM output needs ongoing TrFO to call out while changing to the codec incompatible with the codec of current use, for example, during from GSM-FR (full rate) to GSM-HR (half rate) or from AMR-NB to GSM-EFR, must insert the code converter resource to change between these two kinds of different codec types.In 3GPP TS 48.008, the process of inserting this code converter resource is called as inside BSS (base station sub-system) switching that MSC (mobile switching centre) supports.If use the AMR codec to be operated but call out, and the Traffic Channel bit rate that the output pointer of RRM is called out AMR-NB (for example changes, from the full rate to the half rate), compatible codec is changed in supposition, this means and do not need the code converter resource, by BSS in the situation that not from this change of MSC support processing.Therefore, this calling can remain on the TrFO pattern.
Because for the codec set of the AMR-NB on traffic channel full rate be compatible (from the viewpoint of decoder) for the codec set of the AMR-NB on half rate, and therefore when occurring that speed/pattern does not need transcoder device for transcoding compressed while changing, so, when the change that occurs from one to another, do not need core net or to the explicit control signal of remote mobile radio node.While all disposing compatible codec set at two ends, both low codec modes are identical.Yet, the source speed with payload that AMR under good radio conditions FR situation generates will not wireless channel on " being applicable to " wave point of configuring for the AMR half-rate channel.In other words, the bit rate corresponding with AMR on the traffic channel full rate with good radio conditions is not suitable for only adapting to 7.40kbps or less half rate wireless channel higher than the AMR codec mode of 7.40kbps.
Therefore, during the calling with the remote mobile radio node, while for the Traffic Channel of local mobile wireless node, for example from full rate (FR), changing into half rate (HR), there will be problem.Local mobile wireless node starts to operate in low codec mode (being called initial codec mode), and the remote mobile radio node only is fitted to new speed after it receives the information in AMP codec mode request (CMR) message embedded in the AMR payload from local mobile wireless node.CMR message is following mechanism: wherein recipient's node informs which codec mode of transmit leg node is that the highest of recipient's final step may encoder modes.Therefore, when local mobile wireless node has been set up new wireless channel (be in the above example when local mobile wireless node when the Traffic Channel for the full rate configuration changes to the Traffic Channel for the half rate configuration), adaptive at least one round-trip delay needed between local mobile wireless node and remote mobile radio node, i.e. about 300-400ms.At this time durations, on wave point, will abandon at wave point by all AMR frames from the remote mobile radio node to local mobile wireless node transmission, until the remote mobile radio node is fitted to from the codec rate higher than transmitting at half rate the codec rate that is applicable to half-rate channel by its codec rate downwards.Therefore, the user at local node place detects and can listen distortion or call drop, and the whole speech quality descended of experience.
For switching between BSS, identical problem appears.For example, the low codec mode on the half rate wireless channel is brought into use after can switching between BSS in new local mobile wireless node and new base station, and the remote mobile radio node is still used the high codec mode on the full rate wireless channel, until being apprised of this speed, remote node changes.
Summary of the invention
To between first node and Section Point, send voice signal in wireless communication system.Carry out the coded speech signal from each associated adaptive multi-rate (AMR) encoder in the first and second nodes with a plurality of patterns with different robust degree corresponding with different AMR source bit rates.For the communication of setting up between first node and Section Point, first node transmits on wave point with first data transmission speed, and the AMR encoder associated with the first and second nodes generates the source data for transmission with an AMR source bit rate.Determine and first node need to be changed to the second different message transmission rates at the first data transmission speed on wave point.In response to determined needs, for the first and second nodes, determine new AMR source bit rate.Before the message transmission rate changed on wave point, send information to Section Point, the request Section Point changes to new AMR source bit rate from the AMR source bit rate of its current use.After the predetermined amount of time that changes to new AMR source bit rate from current AMR source bit rate at enough Section Points expires, perhaps, after the Section Point indication changes to new AMR source bit rate, to first node, send and start the indication of being transmitted with the second message transmission rate on wave point.
In a non-limiting example embodiment, waited for the scheduled delay section before carrying out forwarding step, to allow Section Point, there is enough time that its AMR source code speed is adjusted to the 2nd AMR source code speed.The AMR source code speed of the information sent to first node by this way, and the second message transmission rate compatibility on wave point.
A non-limiting aspect of this technology comprises that the in-band signalling in the user plane sends information to Section Point, and this information is codec mode request or order.
The non-limiting aspect of another of this technology can comprise the condition that the indication needs change the first data transmission speed of first node on wave point that detects.
A unrestricted application of example is based on the wireless communication system of GSM.If congestion condition detected, change can be from the full rate wireless channel to the half rate wireless channel.The information sent to Section Point can be codec mode request or order, and current AMR source speed can be corresponding to full rate AMR pattern, and codec mode request or order are corresponding to half rate AMR pattern.In response to determined needs, can start the timer that is provided with the scheduled delay section, and, after timer expiration, can send and start the indication of being transmitted with the half rate message transmission rate on wave point to first node.Waited for the scheduled delay section before the fill order step, allow Section Point enough time to be arranged from full rate AMR mode adjustment to half rate AMR pattern, make the AMR source code speed of the information sent to first node be no more than the half rate message transmission rate on wave point.
Can send information to Section Point, make Section Point change to new AMR source bit rate with a plurality of steps from current AMR source bit rate.In the GSM example application, can send a plurality of codec mode request or order to Section Point, with progressively from full rate AMR mode adjustment to half rate AMR pattern.
This commands steps can comprise switching command, and this switching command makes first node start to be transmitted with the second message transmission rate on the half rate wireless channel.After carrying out switching, the AMR encoder of Section Point generates source data based on new AMR source bit rate.During to the execution switching, the AMR encoder of Section Point generates source data based on new AMR source bit rate.The base station controller of the one or more base stations that relate in controlling switching is coordinated this switching.
In non-limiting GSM example application, this switching can be coordinated by the base station system of controlling two or more base station controllers, and each base station controller is controlled the one or more base stations that relate in switching.
The two-way time that comprises on the other hand the communication association between definite and first node and Section Point of this technology, wherein the scheduled delay segment base is this two-way time.
The accompanying drawing explanation
Fig. 1 is the diagram that is illustrated in the example communication between distance host mobile wireless MS-A and local host mobile wireless MS-B;
Fig. 2 adopts the example communication of Fig. 1, for long-range and local host travelling carriage, all supposes the full rate wireless channel, and initial AMR code rate is provided;
Fig. 3 is based on the non-limiting example functional block diagram of the communication system of GSM, shows the change of the message transmission rate on wave point for the potential switching of mobile communications;
Fig. 4 is the continuation of the example of Fig. 2, shows the problem scenario when the wireless channel transmission rate for MSB reduces;
Fig. 5 A-5C is illustrated in the various message that sends in the example of Fig. 4 and the timeline of information;
Fig. 6 is the flow chart that the non-limiting example process for solving the problem shown in Fig. 4 and Fig. 5 A-C is shown;
Fig. 7 is can be for the non-limiting example functional block diagram of the wireless network node of the process that realizes Fig. 6;
Fig. 8 is the non-limiting example functional block diagram of travelling carriage;
Fig. 9 is based in the communication system of GSM can be for the BSC that realizes the process that Fig. 6 describes or the non-limiting example functional block diagram of BSS node;
Figure 10 is the continuation of Fig. 1,2 and 4 example, but uses the scheme of describing in Fig. 6 to solve problem scenario;
Figure 11 A-11F helps example in explanation Figure 10 at the signaling of each time and the timeline that carries out process of state;
Figure 12 is the non-limiting example signaling diagram for switching within cell in BSC;
Figure 13 is the non-limiting example signaling diagram for the distortion of minizone switching in the BSC shown in Figure 12;
Figure 14 is between BSC or the non-limiting example signaling diagram of intersystem handover.
Embodiment
In the following description, for explaining, unrestricted purpose, set forth specific detail, as specific node, functional entity, technology, agreement, standard etc., in order to the understanding to described technology is provided.In other examples, omitted the detailed description to known method, equipment, technology etc., in order to avoid with fuzzy this description of unnecessary details.Show in the drawings each functional block.Those of ordinary skills should understand, the function of these pieces can be used following manner to realize: use each hardware circuit, use software program and data to combine with microprocessor or the all-purpose computer of appropriate programming, use application-specific integrated circuit (ASIC) (ASIC), programmable logic array, and/or use one or more digital signal processors (DSP).
Following limiting examples is to provide in the context of the communication system based on GSM.Yet, it should be understood by one skilled in the art that technology described herein can be used in use wireless and/or wired connection and use certain digital speech or any digital network of speech information coding in.
The code rate of adaptive source information is called as the codec mode adaptation, and allows the degree of adaptive error protection.With given constant bit-rate, for the amount of bits of transmission sources information and for guard channel be not subject to erroneous transmissions bit impact and the quantity of the redundant bit that adds can be bit change.The voice codec built according to the AMR standard comprises a plurality of codec modes with the different source selected bit rates, wherein the source bit rate as: 4.75,5.15,5.9,6.7,7.4,7.95,10.2 and 12.2kbps.The amount of the speech coding relevant with the amount of chnnel coding can be carried out adaptation according to the requirement of current channel condition setting.Determine current channel condition, and select to provide for detected condition the codec mode of optimum quality with current channel condition.Can comprise for the example of the information of adaptive codec mode: the channel measurement data of indication estimated channel quality or capacity, or the codec mode request (CMR) of codec mode from transmitter side to the transmitter side notice that should select about.It should also be understood that, in the system of GSM type, there are two wireless channels " pattern " (not obscuring with the AMR codec mode), comprise full rate (FR) wireless channel and half rate (HR) wireless channel that there is respectively wireless bit rate 22.8 and 11.4kbps.For the GSM example, defined 16 preferred disposition [referring to 3GPP 28.062] of AMR codec mode, each configuration comprises 4 codec modes of as many as.
With reference now to the exemplary radio communications in the context of nonrestrictive GSM type system shown in Fig. 1.Corresponding to the mobile station MS-A of distance host, set up and the communicating by letter of mobile station MS-B corresponding to local host.Travelling carriage A and B are used full rate (FR) wireless channel to transmit on wave point.In addition, travelling carriage A has and be selected as the AMR encoder operated under the 12.2kbps AMR pattern conformed to full rate (FR) wireless channel with B.Therefore, from the speech of the coding of mobile station MS-A, via base station BTS-A, base station controller BSC-A, one or more network (as core net, internet etc.), BSC-B, BTS-B, then cross over wave point, be sent to local mobile host MS-B.Local mobile host MS-B detects the channel quality of the information received from BTS-B on wave point, and sends it back corresponding suitable CMR to distance host MS-A based on this on reverse path.
Fig. 2 shows the example in Fig. 1, has wherein marked full rate wireless channel and AMR codec mode 12.2.
Existence must change one or more wireless channel transmission rate in travelling carriage A and B and/or the situation of wireless channel in communication period.Fig. 3 is the non-limiting example functional block diagram that helps these the potential changes in explanation GSM type system.Mobile switching centre in core net (MSC) node control is called out, and this node is coupled to and supervises two (or more) base station controllers (BSC) BSC1 and BSC2.Two (or more) base station BSs 1 of BSC1 supervision and BS2, two (or more) base station BSs 3 of BSC2 supervision and BS4.Travelling carriage is communicated by letter with base station BS 1 with message transmission rate 1 on wave point.Detection makes the condition (minizone switching in BSC) that transmission rate must be changed to the second wireless channel transmission rate 2 when still being connected to BS1.Alternatively, travelling carriage can move, and makes it no longer in the scope of base station BS 1, but moves in the scope of BS2 (that is, minizone switching in BSC).In this case, carry out switching, change the wireless channel that travelling carriage is transmitted.In addition, if travelling carriage continues to move to base station BS 3, move to outside the scope of BS2, carry out between the BSC from BS2 to BS3 and switch.Each in these situations all can affect the AMR code rate that the local and remote host mobility platform in Fig. 2 is used in its communication.
Use is from the same example of Fig. 2, the such impact of signal in problem scenario shown in Figure 4.Certain time point during communicating between MS-A and MS-B, BSC-B detects, wireless coverage due to the wireless network at BSC-B place, in the community that the BTS-B transmitted at local host MS-B serves, or congested in the BSC-B Zhong community that must move at MS-B.Also can detect other congestion condition, as the overload of the transmission network between BSC-B and BTS-B.Then, base station controller B sends order via BTS-B, so that mobile station MS-B is moved on to the half rate wireless channel from the full rate wireless channel.In addition, BSC-B also indicates to MS-B: when bringing into use new wireless channel, the AMR pattern of the codec in travelling carriage (MS-B) should be reduced to the AMR pattern conformed to the half rate wireless channel.In this example, select the AMR pattern of 4.75kbps.Therefore, MS-B sends 4.75 CMR message on reverse path to distance host MS-A.
Unfortunately, receive the new CMR of this 4.75kbps at MS-A before, exist significantly and postpone.Simultaneously, MS-A continues to send with the AMR pattern of 12.2kbps the speech of coding, when this speech arrives BTS-B, " is not applicable to " the new half rate wireless channel to MS-B.Therefore, unaccommodated Speech frame is abandoned by BTS-B, causes that the user of MS-B is detectable listens distortion.As indicated as the bottom of Fig. 4, the example of the delay before MS-A reduces its AMR code rate can, the magnitude of 400 milliseconds, mean that BTS-B may need to abandon the speech of 400 milliseconds.
Fig. 5 A-5C is the timeline that the problem scenario identified in the example of Fig. 4 is shown.In Fig. 5 A, BSC-B moves to the half rate wireless channel at the moment order MS-B that equals Tx.At this some place, MS-B changes to half rate (HR) by the transmission in its up link (UP), also sends the CMR of the half rate AMR pattern that equals 4.75kbps.
In Fig. 5 B, the time in past is increased to: Tx adds that time that MSB moves to new half rate wireless channel adds that new half rate (HR) CMR message arrives half of MS-A required two-way time (RTT).Unfortunately, the up link Speech frame from MS-A continues, with full AMR speed arrival, therefore can not be applicable to the half rate wireless channel to MS-B.
Fig. 5 C shows following situation, has wherein passed through time enough, make travelling carriage A be switched to now with half rate AMR pattern and transmitted, and MS-B receives these half rates AMR pattern Speech frame now.As shown in the bottom of Fig. 5 C, the time that speech from MS-A to MS-B interrupts is that T=Tx adds that time that MS-B moves to new half-rate channel adds from MS-B to MS-A and returns to the whole RTT of MS-B.The typical case value of this time T is the magnitude 400 to 500ms.
Below technology avoided the problem of this interruption speech, this technology is not only effectively but also be easy to realize.Use the non-limiting example of Fig. 4, before the wireless channel transmission rate of MS-B changes, to MS-A, send new AMR source code mode request.Through enough making MS-A its AMR source code pattern/bit rate can be changed to after the wireless channel transmission rate of MS-B changes the time of the new AMR source code pattern/bit rate conformed to, perhaps at MS-A, indicate in any suitable manner after it has changed to new AMR source code pattern/bit rate, change to the second message transmission rate on the wireless channel to MS-B.
In conjunction with the flow chart description of Fig. 6, can follow to realize the non-limiting example to the more general process of the solution of the problems referred to above now.These processes can realize in controlling node, control node in wireless network or associated with wireless network.In the GSM example, such control node can be BSC, BTS or BSS.Fig. 6 hypothesis is set up communication between first node and Section Point.In step S1, detect the needs that by the first node transmission rate on wave point changes to the second different transmission rates.Need in response to determined change, for the first and second nodes, determine new coding source bit rate (step S2).Then, before the transmission rate changed on wave point, to Section Point, send information, the request Section Point changes (step S3) from initial code source bit rate to new coding source bit rate.After predetermined amount of time (enough Section Points change to new coding source bit rate from this initial code source bit rate) expires, perhaps, after the Section Point indication changes to new coding source bit rate, to first node, send and start the indication (step S4) of being transmitted with the second message transmission rate on wave point.Advantageously, the first node user can not experience the adverse effect to speech quality, and saves the wireless transmission resources that is wasted in the trial Speech frame that transmission " is not applicable to " on wave point originally.
Preferably with in-band signalling, carry out transmission information in step S3, to avoid sending independent band, control signaling outward.But, also can use the outer signaling of controlling of band.
Fig. 7 shows the non-limiting functional block diagram of the general wireless network node 10 of the process that can describe for the flow chart of realizing Fig. 6.This wireless network node comprises condition detector 12, the wave point of the travelling carriage that the radio communication that being used for definite indication needs change to supervise at wireless network node 10 relates to (for conveniently, being called local travelling carriage) or the condition of the message transmission rate on wireless channel.Condition detector 12 provides the testing conditions on bus 16 to radio resource controller 14, and the condition of radio resource controller 14 based on detected makes a change the message transmission rate on the wave point of local travelling carriage or local travelling carriage be switched to the judgement of the new wireless channel with different pieces of information transmission rate.Utilize delay calculator 20 to coordinate this judgement of radio resource controllers 14, described delay calculator 20 is determined at radio resource controller via communication interface 22 transmissions for the scheduled delay section before the order of the message transmission rate that changes local travelling carriage and use.Wireless network node 10 can also have other communication interfaces to other nodes.Delay calculator 20 can be considered following factor, as the two-way time between local and remote host node (RTT), local travelling carriage node motion to the time of new channel, the processing time in each node, etc.Can use any suitable process of the estimation for determining RTT.Radio resource controller 14 also communicates with codec controller 18, and codec controller 18 generates for changing the AMR codec mode at local and remote host node place or order or the request of speed.
Waited for the scheduled delay section before the order sent for changing the transmission rate that local mobile host node uses, allow the distance host node to have sufficient time to its AMR source code speed is adjusted to new AMR source code speed, make the AMR source code speed of the information sent to the local host mobile node and the new transmission rate-compatible on wave point.
Fig. 8 is the non-limiting example functional block diagram of travelling carriage 30.Travelling carriage 30 comprises: speech/channel encoder 32 can adopt different coding pattern or different encoding schemes with different robust degree.The condition of wireless quality detector 34 sensings and/or analysis downlink radio channel, and the quality indication is provided to base station on up link via transceiver 36, as the CMR signal.Receive the downlink information from base station via transceiver, and provide it to speech/channel decoder 40.The voice signal that the signal that decoder 40 decodings receive makes the user of travelling carriage to listen with generation.In addition, decoder 40 is decoding or detection codec information in received signal also, and described codec information is from the quality of measured uplink channel or condition is that derive and/or quality or condition that indicate/comprise measured uplink channel.This information can be or comprise codec mode request or order, and codec mode request or order offer encoder 32 via controller 28, so that encoder 32 is set to operate in this, ask/order corresponding codec mode.
The non-limiting example of the wireless network node more specifically in non-limiting example GSM type system is described in conjunction with the non-limiting functional block diagram of BSC or BSS node 50 now.Node 50 comprises congestion controller 52, switch controller 54, communication interface 56, delay timer 58, RTT and delay controller 60 and AMR codec controller 62, and these are coupled via bus 64.Congestion controller 52 detects congested situation, change or switching that this congested situation may be ratified just by base station, processed, the finally wireless channel transmission rate of one of travelling carriage in the communication of node 50 supervision.Switch controller 54 determines whether to need wireless channel to change to have the wireless channel of different transmission rates or changes to complete different channels.If determine and need to change, switch controller 54 is notified RTT and delay controller 60 and AMR codec controllers 62.Provide new AMR source bit rate/pattern CMR to send travelling carriage A and B to, preferably use in-band signalling.RTT and delay controller 60 are determined scheduled delay, and it is inputed to delay timer 58.When timer 58 expires, switch controller 54 sends order or other signals that indication should realize wireless transmission rate/channel-changing.
With reference now to the example shown in Figure 10,, wherein apply above-mentioned technology to solve the problem shown in Fig. 4 and Fig. 5 A-5C.As shown in Figure 4, GSM full rate (FR) radio communication channel between initial communication movement-based platform MS-B between mobile station MS-A and MS-B and its base station BTS and between mobile station MS-A and its base station BTS-A, and travelling carriage A and B all at full speed rate AMR pattern 12.2kbps generate coded speech.As putting 1 indication, BSC-B detects congested, describedly congestedly is enough to need mobile station MS-B to move to the half rate wireless channel.But the transfer to the half rate wireless channel does not also occur.On the contrary, MS-B continues to use the full rate wireless channel.
Then, BSC-B starts the CMR sent from the B side is progressively descended, and at first from 12.2 to 7.4kbps, then further arrives 5.90kbps, preferably with in-band signalling, realizes.At about 200 milliseconds (corresponding to the scheduled delays of non-limiting example) afterwards, BTS-B order MS-B moves to the half rate wireless channel.After receiving this order, MS-B moves to the half rate wireless channel, and, when mobile station MS-A carries out the AMR coding with 7.4kbps or lower speed (but not 12.2kbps) now, starts to be transmitted with half transmission rate.Therefore, the AMR coded speech from the 7.4kbps of MS-A (or more low rate) can " be applicable to " the half rate wireless channel between base station BTS-B and mobile station MS-B.By this way, do not have Speech frame to lose, and do not have the voice distortion from MS-A to MS-B of situation as shown in Figure 4.Advantageously eliminated the adverse effect to speech quality that the user of the MS-B in Fig. 4 experiences.
With reference now to the timeline in Figure 11 A-11F,, emphasized the advantage of just having compared with above-described timeline Fig. 5 A-5C for the technology of Figure 10 description.Figure 11 A shows the situation of the time before moment T1, and wherein mobile station MS-A and MS-B transmit in up link on full rate (FR) wireless channel, and the transmission CMR corresponding with full rate AMR pattern.In Figure 11 B, the time has arrived T1, and wherein user plane handles device B (for example, in BSC-B) determines the wireless transmission rate that needs to change MSB.User plane handles device B inserts the CMR corresponding with half rate AMR pattern in being addressed to the user plane Speech frame of MS-A.Note, at moment T1, from the up link full speed channel on the wireless channel of mobile station MS-B, transmission does not change.
In Figure 11 C, the time advances to T1 from T1 and adds half RTT.At this constantly, AMR half-rate mode CMR message has arrived MS-A.Again, MS-B continues rate at full speed and is transmitted on wireless channel.Figure 11 D shows T1 constantly and adds that half RTT adds that the MS-A place is fitted to the required reaction time of half rate AMR pattern on user plane for MS-A.The UP generated referring to the MS-A place equals the bold box of HR.
Figure 11 E shows T1 constantly and adds that whole RTT adds the reaction time at MS-B place.AMR half rate information from MS-A has arrived MS-B, as shown in the bold box of UP=HR.Figure 11 F shows T1 constantly and adds that RTT adds that the reaction time at MS-B place adds uncertain time surplus T
margin.At this some place, BSC order MS-B is transmitted with half rate on wave point, as shown in the bold box of UP=HR.In addition, MS-B also transmits the CMR corresponding with half rate AMR pattern.There are not speech loss or distortion as the MS-B place in Fig. 5.
Figure 12 shows the signaling of the example for switching within cell in the BSC diagram of realizing in a kind of non-limiting example mode in BSC.Functional entity in BSC is designated as vertical line, as each vertical line top institute mark, wherein except BTS-B, MS-B and MS-A.At first, make switching controls and service resources processor know and need compatible switching in the BSCNei community.Then, switch controller provides new wireless channel for MS-B, and this new wireless channel is sent to base station BTS-B.Yet, the pending switching to new channel such as BTS-B.Switch controller is the start delay timer also, and this timer uses the predetermined value of the calculating of being described/illustrating as the example in Figure 11 A-11F above.Switch controller also starts or initiates to change to the codec mode speed of initial codec mode (ICM), in example above, this is from AMR codec mode 12.2 to 7.40 and further via 5.90 switchings that drop to 4.75kbps, because CMR only allows progressively to change a codec mode every a radio frames.Transmission processor transmits the ICM that activates codec set and new definition to the user plane handles device.Then, the user plane handles device starts (preferably step by step) and is originally sent and the CMR that used by MS-A is fitted to calculated ICM (for example, from 12.2, progressively dropping to 4.75kbps) by MS-B current.After delay timer expires, switch controller sends wireless distribution order (Abis be in BSC with the communication interface of BTS) to the Abis interface processor, then, the Abis interface processor sends wireless distribution change (changing to new wireless channel) order via BTS-B to travelling carriage B.In the example shown in Figure 10, then, mobile station MS-B will be switched to the half rate wireless transmission from full rate.
Figure 13 be with the similar BSC of the switching shown in Figure 12 in the non-limiting example signaling diagram of minizone switching, difference is that the switch controller under the switch instances of minizone generates switching command but not the wireless distribution order.
Figure 14 shows the non-limiting example signaling diagram for switching or intersystem handover between BSC.Herein, switching is between two base stations by two different BSC or two different system controls.Although show delay timer, following situation is possible: the time due to the new BSS signaling cost of MSC-, may not need extra delay.
Although be shown specifically and described various embodiment, claim is not limited to any specific embodiment or example.Top description not should be understood to imply that any concrete unit, step, scope or function are necessary, makes it to be included within the scope of the claims.The scope of patented subject matter only is defined by the claims.The word that the scope of statutory protection is put down in writing in allowed claim and institute of equal value thereof limit.All 26S Proteasome Structure and Function equivalences of the element of above preferred embodiment known to persons of ordinary skill in the art are included in this by reference clearly, and are intended to be comprised by these claims.In addition, each and all problems that equipment or method must not solve that the present invention will solve so that its be included in these claims.Be intended to cause the 6th section of 35USC § 112 without any claim, unless used " for ... device " or " for ... step ".And no matter whether this embodiment, feature, parts or step are put down in writing in the claims, it is that contribution is to the public that any embodiment, feature, assembly or the step in this specification is not intended to.
Claims (14)
1. the equipment for the adaptive multi-rate AMR coding of controlling the voice signal that wireless communication system will send between first node (MS A) and Section Point (MS B), wherein from each the associated AMR encoder (32) in first node and Section Point, with a plurality of patterns with different robust degree corresponding with different AMR source bit rates, carry out the coded speech signal, wherein for the communication of setting up between first node and Section Point, first node transmits on wave point with first data transmission speed, the AMR encoder associated with first node and Section Point generates the source data for transmission with an AMR source bit rate, described equipment is characterised in that the electronic circuit that is configured to carry out following operation:
Determine and first node need to be changed to different the second message transmission rates (12) at the first data transmission speed on wave point;
In response to determined needs, for the first and second nodes, determine new AMR source bit rate (18);
Before the message transmission rate changed on wave point, the information sent to Section Point is provided, the request Section Point changes (22) from current AMR source bit rate to new AMR source bit rate; And
After the predetermined amount of time that changes to new AMR source bit rate from current AMR source bit rate at enough Section Points expires, perhaps after the Section Point indication changes to new AMR source bit rate, provide to first node, send start for first node the indication (18,20) of being transmitted with the second message transmission rate on wave point.
2. equipment according to claim 1, wherein wait for that the scheduled delay section allows Section Point to have enough time that its AMR source code speed is adjusted to the 2nd AMR source code speed, makes the AMR source code speed of the information sent to first node and the second message transmission rate compatibility on wave point.
3. according to the described equipment of any one in the claims, wherein said electronic circuit arrangement sends information for the in-band signalling in the user plane to Section Point.
4. equipment according to claim 3, the information wherein sent to Section Point is codec mode request or order.
5. according to the described equipment of any one in claim 1 to 2, wherein said wireless communication system is based on the wireless communication system of GSM, described electronic circuit arrangement needs to change the condition of the first data transmission speed of first node on wave point for detecting indication, and second message transmission rate corresponding with the half rate wireless channel, and first data transmission speed is corresponding with the full rate wireless channel.
6. equipment according to claim 5, the information wherein sent to Section Point is codec mode request or order, and current AMR source speed is corresponding with full rate AMR pattern, and codec mode request or order are corresponding with half rate AMR pattern.
7. equipment according to claim 6, wherein said electronic circuit arrangement is:
In response to determined needs, start the timer that is provided with the scheduled delay section,
After timer expiration, provide to first node, send start for first node the indication of being transmitted with the half rate message transmission rate on wave point,
Wherein, wait for that the scheduled delay section allows Section Point enough time to be arranged from full rate AMR mode adjustment to half rate AMR pattern, makes the AMR source code speed of the information sent to first node be no more than the half rate message transmission rate on wave point.
8. equipment according to claim 5, wherein first node is used the first full rate wireless channel to communicate by letter on wave point, described electronic circuit arrangement is: provide switching command so that first node starts to be transmitted with the second message transmission rate on the half rate wireless channel, thereby, after carrying out described switching, the AMR encoder of Section Point generates source data based on new AMR source bit rate.
9. equipment according to claim 8, wherein, when carrying out switching, the AMR encoder of Section Point generates source data based on new AMR source bit rate.
10. equipment according to claim 9, realize in the base station controller of controlling the related one or more base stations of switching.
11. equipment according to claim 9 realizes that in the control node of controlling two or more base station controllers wherein each base station controller is controlled the related one or more base stations of switching.
12., according to the described equipment of any one in claim 1 to 2, wherein said electronic circuit arrangement is:
Determine and first node and Section Point between two-way time of communication association;
Based on determining described scheduled delay section described two-way time.
13., according to the described equipment of any one in claim 1 to 2, wherein said electronic circuit arrangement is: send information to Section Point, make Section Point change to new AMR source bit rate with a plurality of steps from current AMR source bit rate.
14. the method for the adaptive multi-rate AMR coding of the voice signal that will send between first node and Section Point in wireless communication system is controlled in a use according to the defined equipment of any one in claim 1 to 13.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/607,404 | 2009-10-28 | ||
| US12/607,404 US8200215B2 (en) | 2005-09-20 | 2009-10-28 | Codec rate adaptation for radio channel rate change |
| PCT/SE2010/051065 WO2011053222A1 (en) | 2009-10-28 | 2010-10-04 | Codec rate adaptation for radio channel rate change |
Publications (2)
| Publication Number | Publication Date |
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| CN102667925A CN102667925A (en) | 2012-09-12 |
| CN102667925B true CN102667925B (en) | 2014-01-08 |
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| CN201080048503.6A Expired - Fee Related CN102667925B (en) | 2009-10-28 | 2010-10-04 | Codec rate adaptation for radio channel rate change |
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| EP (1) | EP2494549A1 (en) |
| CN (1) | CN102667925B (en) |
| WO (1) | WO2011053222A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8929342B1 (en) | 2012-12-21 | 2015-01-06 | Sprint Spectrum L.P. | Selection of wireless coverage areas and operating points of media codecs |
| US9088972B1 (en) | 2012-12-21 | 2015-07-21 | Sprint Spectrum L.P. | Selection of wireless coverage areas and media codecs |
| US9351278B1 (en) | 2014-01-21 | 2016-05-24 | Sprint Spectrum L.P. | Controlling wireless paging parameters based on device type prevalence |
| US9763141B1 (en) | 2014-01-21 | 2017-09-12 | Sprint Spectrum L.P. | Controlling handoff and channel assignment parameters based on device type |
| US10136360B2 (en) | 2014-06-30 | 2018-11-20 | Telefonaktiebolaget Lm Ericsson (Publ) | Direct rate adaptation for an end-to-end communication path by a cellular network node |
| CN106576271B (en) * | 2015-05-30 | 2020-01-10 | 华为技术有限公司 | Method and apparatus for speech coding rate adjustment |
| CN106301679B (en) * | 2015-06-10 | 2020-10-23 | 华为技术有限公司 | Method and device for adjusting service rate |
| WO2017193368A1 (en) * | 2016-05-13 | 2017-11-16 | 华为技术有限公司 | Method and device for adjusting coding rate |
| CN112291037B (en) * | 2016-10-07 | 2022-06-03 | 宏达国际电子股份有限公司 | Apparatus and method for performing codec rate adaptation in wireless communication system |
| US10666383B2 (en) | 2016-10-07 | 2020-05-26 | Htc Corporation | Device and method of performing codec rate adaptation in a wireless communication system |
| RU2744037C1 (en) * | 2020-07-28 | 2021-03-02 | Акционерное общество "Научно-исследовательский институт телевидения" | Transmission rate in radio links selecting method |
| CN112199216A (en) * | 2020-10-21 | 2021-01-08 | 哲库科技(北京)有限公司 | Interface configuration method and device, modulation-demodulation chip and storage medium |
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| CN1618250A (en) * | 2001-12-28 | 2005-05-18 | 北方电信网络有限公司 | Adaptive data rate control for mobile data transfer |
| CN101213802A (en) * | 2005-07-01 | 2008-07-02 | 三星电子株式会社 | Method and apparatus for controlling rate of voice service in a mobile communication system supporting voice service via packet network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101218774B (en) * | 2005-06-15 | 2012-10-10 | 艾利森电话股份有限公司 | Adaptive mobile telephony voice transport via an Internet protocol network |
| CN101422061B (en) * | 2006-04-12 | 2011-08-10 | 交互数字技术公司 | Method for radio resource control requested codec rate control for voip |
| US8209187B2 (en) * | 2006-12-05 | 2012-06-26 | Nokia Corporation | Speech coding arrangement for communication networks |
| KR101167523B1 (en) * | 2008-01-17 | 2012-07-20 | 노키아 코포레이션 | Adaptive multi-rate codec bit rate control in a wireless system |
-
2010
- 2010-10-04 EP EP10827232A patent/EP2494549A1/en not_active Withdrawn
- 2010-10-04 CN CN201080048503.6A patent/CN102667925B/en not_active Expired - Fee Related
- 2010-10-04 WO PCT/SE2010/051065 patent/WO2011053222A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1618250A (en) * | 2001-12-28 | 2005-05-18 | 北方电信网络有限公司 | Adaptive data rate control for mobile data transfer |
| CN101213802A (en) * | 2005-07-01 | 2008-07-02 | 三星电子株式会社 | Method and apparatus for controlling rate of voice service in a mobile communication system supporting voice service via packet network |
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|---|---|
| WO2011053222A1 (en) | 2011-05-05 |
| CN102667925A (en) | 2012-09-12 |
| EP2494549A1 (en) | 2012-09-05 |
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