CN101938851B - Self-adaptive rate adjusting method and system for voice coder - Google Patents

Self-adaptive rate adjusting method and system for voice coder Download PDF

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Publication number
CN101938851B
CN101938851B CN200910088609.8A CN200910088609A CN101938851B CN 101938851 B CN101938851 B CN 101938851B CN 200910088609 A CN200910088609 A CN 200910088609A CN 101938851 B CN101938851 B CN 101938851B
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adjustment
pdcch order
speech coder
amr
bit
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CN200910088609.8A
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CN101938851A (en
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彭佛才
韩翠红
谭源春
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中兴通讯股份有限公司
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Abstract

The invention discloses a self-adaptive rate adjusting method for a voice coder. The method comprises the following steps that: a physical layer of an evolution node B (eNB) generates and emits a physical downlink control channel (PDCCH) command which comprises the rate adjusting information of the voice coder according to the instruction of an upper layer; the physical layer of user equipment (UE) demodulates a PDCCH so as to obtain the PDCCH command; the UE judges whether the current rate of the voice coder reaches an adjusting limit or not; the rate of the voice coder is not adjusted and the current operation flow is finished if the current rate of the voice coder reaches the adjusting limit; and the UE correspondingly adjusts the rate of the voice coder according to the PDCCH command if the current rate of the voice coder does not reach the adjusting limit. The invention also discloses a self-adaptive rate adjusting system for the voice coder. The system comprises the eNB and the UE, wherein the UE comprises a channel demodulating unit, a judging unit and an adaptive multi-rate (AMR) adjusting unit. A long term evolution system can support the self-adaptive adjusting function of the voice coder well.

Description

Speech coder rate adaptation method of adjustment and system

Technical field

The present invention relates to Long Term Evolution (LTE, Long Term Evolution) speech encoder techniques in mobile communication system, relate in particular to speech coder rate adaptation method of adjustment and the system of transmit physical down control channel in LTE system (PDCCH, PhysicalDownlink Control Channel) order (PDCCH Order).

Background technology

According to 3G (Third Generation) Moblie partner program (3GPP, 3rd Generation Partnership Project) motion RP-090660: " Vocoder rate adaptation for LTE " (the speech coder rate adaptation of LTE), LTE is about to increase speech coder rate adaptation function.But 3GPP not yet defines and how speech coder rate adaptation function is joined in new standard and to be gone at present.

According to 3GPP TS26.101V8.0.0, the speech based on Internet Protocol of LTE (VoIP, Voice overInternet Protocol) can be used a kind of in narrowband self-adaption multi-speed (AMR-NB) Multi-encoding device.

Table 1 is AMR-NB speed grade table, as shown in table 1.

AMR grade AMR speed (kbps) Bit number in a speech frame Category-A bit number Category-B bit number C class bit number ?0 ??4.75 ??95 ??42 ??53 ??0 ?1 ??5.15 ??103 ??49 ??54 ??0 ?2 ??5.90 ??118 ??55 ??63 ??0 ?3 ??6.70 ??134 ??58 ??76 ??0 ?4 ??7.40 ??148 ??61 ??87 ??0 ?5 ??7.95 ??159 ??75 ??84 ??0 ?6 ??10.2 ??204 ??65 ??99 ??40 ?7 ??12.2 ??244 ??81 ??103 ??60

Table 1

According to 3GPP TS26.201V8.0.0, the VoIP of LTE can also be used a kind of in the many speed of wideband adaptive (AMR-WB) Multi-encoding device.Table 2 is AMR-WB speed grade table, as shown in table 2.

AMR grade AMR speed (kbps) Bit number in a speech frame Category-A bit number Category-B bit number C class bit number ?0 ??6.60 ??132 ??54 ??78 ??0 ?1 ??8.85 ??177 ??64 ??113 ??0 ?2 ??12.65 ??253 ??72 ??181 ??0 ?3 ??14.25 ??285 ??72 ??213 ??0 ?4 ??15.85 ??317 ??72 ??245 ??0 ?5 ??18.25 ??365 ??72 ??293 ??0 ?6 ??19.85 ??397 ??72 ??325 ??0 ?7 ??23.05 ??461 ??72 ??389 ??0 ?8 ??23.85 ??477 ??72 ??405 ??0

Table 2

According to the 5.3.3.1.3 joint of 3GPP TS 36.212V8.7.0, the physical layer of evolved base station (eNB, Evolution NodeB) can give subscriber equipment (UE, User Equipment) transmitting PDCCH order to control the behavior of UE.But at present this agreement also do not define eNB or/and UE how to launch PDCCH order just can be so that LTE system energy support voice encoder rate be adjusted function.

According to 9.2 joints of 3GPP TS 36.213V8.7.0, eNB can to UE launch that semi-persistent scheduling (SPS) activates and release command with the behavior of control UE.

According to 10.1 joints of 3GPP TS 36.213 V8.7.0, UE can be take and apply for that eNB is as its service to eNB transmission scheduling request (SR).

According to the 5.4.1 joint of 3GPP TS 36.211V8.7.0, SR is used on-off keying modulation (OOK), and SR can only be set to " 1 ", can not be set to " 0 ", and this information can not make full use of.

According to the motion R1-083346 (R2-084764) of 3GPP: " LS on considerations on transportblock sizes for VoIP " (to co-signing of the consideration of VoIP transmission block size), transmission block size (TB Size) corresponding to speech coder speed that the core net of VoIP is supported is as shown in table 3.

Associative list 1, table 2 and table 3, can find out that table 3 also lacks some speech coder speed of table 1 and table 2.Therefore table 3 also needs further perfect.

In conjunction with the 7.1.7.2.1 joint of 3GPP TS 36.213 V8.7.0, the TB Size of table 3 the inside is that 192 bits and 320 bits do not exist at 3GPP TS 36.213 V8.7.0, should be revised as other numerical value, for example, is revised as respectively 208 bits and 328 bits.

Table 3

For making LTE system energy support voice encoder rate, adjust function and compatible existing system, a kind of speech coder rate adjusting method need to be proposed, can make LTE system well support voice encoder rate adjust function, obtain higher power system capacity, higher service quality is provided, makes full use of dispatch request information completely compatible with existing system.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of speech coder rate adaptation method of adjustment and system, makes LTE system support voice encoder rate self adaptation adjustment function completely compatible with existing system well.

For achieving the above object, technical scheme of the present invention is achieved in that

The invention provides a kind of speech coder rate adaptation method of adjustment, comprising:

The physical layer of evolved base station eNB produces according to the indication on upper strata and launches the physical downlink control channel PDCCH order that comprises speech coder rate adjustment information;

The physical layer demodulation PDCCH of user equipment (UE), obtains this PDCCH order;

UE judges whether current speech encoder rate has reached the adjustment limit, if reach, UE does not carry out the adjustment of speech coder speed, and current operation flow process finishes; If do not reach, UE carries out the corresponding adjustment of speech coder speed according to PDCCH order.

In technique scheme, described upper strata is media access control layer or radio resource control layer.

Described PDCCH order comprises for the PDCCH order of cell-level with for the PDCCH order of single UE.

Described PDCCH order adopts Downlink Control Information DCI form, and this DCI form is DCI 0 form, DCI 1 form, DCI 1A form, DCI 2 forms or DCI 2A form.

In technique scheme, described DCI 1A form comprises:

DCI 0 form and DCI 1A form diacritics, 1 bit, is set to " 1 ";

Centralized and distributed virtual resource block sign, 1 bit, is set to " 1 ";

Resource block assignments indication, altogether Ceil (log 2(N rB dL(N rB dL+ 1)/2)) bit, is all set to " 1 ", and wherein, Ceil () rounds on representing, log 2() represents to get and take 2 be the end logarithm, N rB dLthe number that represents downlink resource piece;

Narrowband self-adaption multi-speed AMR adjusts sign, and 1 bit, if be set to " 0 ", represents not adjust, if be set to " 1 ", represents to need to adjust;

Wideband A MR adjusts sign, and 1 bit represents not adjust if be set to " 0 ", if be set to " 1 ", represents to need to adjust;

The indication of descending AMR speed adjusted value, totally 4 bits, span is 0~15, wherein, descending AMR speed adjusted value indication is corresponding one by one with AMR speed;

The indication of up AMR speed adjusted value, totally 4 bits, span is 0~15, wherein, up AMR speed adjusted value indication is corresponding one by one with AMR speed;

All the other bits are all set to " 0 ".

In technique scheme, the described PDCCH order for cell-level adopts DCI 1A form.

The described public area of depositing in control channel Elements C CE for the PDCCH order of cell-level.

The described PDCCH order for cell-level adopts cell load Radio Network Temporary Identifier CL-RNTI to carry out scrambling.

Described CL-RNTI represents with 16 bits, and span is 0~65535.Described CL-RNTI value is 65533.

In technique scheme, the described PDCCH order for single UE adopts DCI 1A form.

Public area or the exclusive district of CCE deposited in the described PDCCH order for single UE.

The described PDCCH order for single UE adopts Cell Radio Network Temporary Identifier/Identity, Cell-RNTI and/or semi-persistent scheduling Cell Radio Network Temporary Identifier/Identity, Cell-RNTI to carry out scrambling.

In technique scheme, the method also comprises: UE raises an AMR grade by dispatch request bit to eNB request, and dispatch request bit d (0) is set to zero.

The present invention also provides a kind of speech coder rate adaptation adjustment System, comprising: eNB and UE; Wherein,

ENB, for producing according to the indication on upper strata and launching the PDCCH order that comprises speech coder rate adjustment information;

UE comprises: channel demodulation unit, judging unit and AMR speed adjustment unit; Concrete:

Channel demodulation unit, for demodulation PDCCH, obtains this PDCCH order;

Judging unit, for judging whether current speech encoder rate has reached the adjustment limit, when not reaching the adjustment limit, sends and adjusts instruction to AMR speed adjustment unit; When reaching the adjustment limit, do not carry out any operation;

AMR speed adjustment unit, the adjustment instruction for sending according to judging unit, adjusts accordingly speech coder speed.

In technique scheme, described upper strata is media access control layer or radio resource control layer.

Described PDCCH order comprises for the PDCCH order of cell-level with for the PDCCH order of single UE.

Speech coder rate adaptation method of adjustment of the present invention and system, can make LTE system support voice encoder rate adaptation function completely compatible with existing system well, thereby make LTE system obtain higher power system capacity, higher service quality is provided, takes full advantage of dispatch request information completely compatible with existing system.

Accompanying drawing explanation

Fig. 1 is the schematic flow sheet of speech coder rate adaptation method of adjustment of the present invention.

Embodiment

Basic thought of the present invention is: eNB produces and launches the PDCCH order of adjusting for speech coder speed, the physical layer demodulation PDCCH of UE, and afterwards, UE carries out the corresponding adjustment of speech coder speed according to this PDCCH order.The inventive method and system, by the PDCCH order between eNB and UE, make LTE system realize support voice encoder rate self adaptation well and adjust function completely compatible with existing system.

Fig. 1 is speech coder rate adaptation method of adjustment of the present invention, and as shown in Figure 1, the inventive method comprises the steps:

The physical layer of step 1, eNB produces according to the indication on upper strata and launches the PDCCH order that comprises speech coder rate adjustment information;

The physical layer demodulation PDCCH of step 2, UE, obtains this PDCCH order;

Step 3, UE judge whether current speech encoder rate has reached the adjustment limit, if reach, UE does not carry out the adjustment of speech coder speed, and current operation flow process finishes; If do not reach, UE carries out the corresponding adjustment of speech coder speed according to PDCCH order;

In this step, lower/raise a grade, and current speech encoder rate has been minimum/maximum if speech coder rate adjustment information is AMR speed, UE no longer carries out the adjustment of speech coder speed; Otherwise UE carries out the corresponding adjustment of speech coder speed according to PDCCH.

The present invention can further comprise: UE raises an AMR speed grade by dispatch request bit to eNB request, and dispatch request bit d (0) is set to zero, i.e. d (0)=0.

In above-mentioned steps 1, upper strata can be media access control layer (MAC, Media Access Control), can be also radio resource control layer (RRC, Radio Resource Control).

In above-mentioned steps 2, if for the PDCCH order of cell-level, adopt Downlink Control Information (DCI) 1A form, i.e. DCI 1A form, this DCI 1A form bit number is less, and broadcast can be sent to the edge of community, therefore adopts this form; The public area of control channel element (CCE) is deposited in PDCCH order.PDCCH order for cell-level adopts cell load Radio Network Temporary Identifier (CL-RNTI) or other Radio Network Temporary Identifiers to carry out scrambling.CL-RNTI represents with 16 bits, and span is 0~65535, by eNB, is specified.Especially, described CL-RNTI value is 65533, and 16 corresponding hex value are 0xFFFD.

If for the PDCCH order of single UE, adopt DCI 1A form or other DCI forms to launch, public area or the exclusive district of CCE are deposited in corresponding PDCCH order.PDCCH order for single UE adopts Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI) and/or other Radio Network Temporary Identifiers to carry out scrambling, and other Radio Network Temporary Identifiers can be semi-persistent scheduling Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (SPSC-RNTI).

DCI 1A form for cell-level and single UE is as follows:

DCI 0 form and DCI 1A form diacritics, 1 bit, if be set to " 0 ", represents DCI 0 form, is set to " 1 ", represents DCI 1A form;

Centralized and distributed virtual resource block (VRB) sign, 1 bit, is set to " 1 ";

Resource block assignments indication, altogether Ceil (log 2(N rB dL(N rB dL+ 1)/2)) bit, is all set to " 1 ", and wherein, Ceil () rounds on representing, log 2() represents to get and take 2 be the end logarithm, N rB dLthe number that represents downlink resource piece;

Arrowband AMR adjusts sign, and 1 bit, if be set to " 0 ", represents not adjust, if be set to " 1 ", represents to need to adjust;

Wideband A MR adjusts sign, and 1 bit represents not adjust if be set to " 0 ", if be set to " 1 ", represents to need to adjust;

The indication of descending AMR speed adjusted value, totally 4 bits, span is 0~15, table 4, table 5 are two kinds of descending AMR speed adjusted values indications and the corresponding table of AMR speed; As shown in table 4, table 5, descending AMR speed adjusted value indication is corresponding one by one with AMR speed.

Descending AMR speed adjusted value indication (binary system) Descending AMR speed adjusted value indication (decimal system) AMR grade Arrowband AMR speed (kbps) Wideband A MR speed (kbps) ??0000 ??0 ??0 ??4.75 ??6.60 ??0001 ??1 ??1 ??5.15 ??8.85 ??0010 ??2 ??2 ??5.90 ??12.65 ??0011 ??3 ??3 ??6.70 ??14.25 ??0100 ??4 ??4 ??7.40 ??15.85 ??0101 ??5 ??5 ??7.95 ??18.25 ??0110 ??6 ??6 ??10.2 ??19.85 ??0111 ??7 ??7 ??12.2 ??23.05 ??1000 ??8 ??8 Do not adjust ??23.85 ??1001-1111 ??9-15 Reserved Do not adjust Do not adjust

Table 4

Descending AMR speed adjusted value indication (binary system) Descending AMR speed adjusted value indication (decimal system) AMR grade Arrowband AMR speed (kbps) Wideband A MR speed (kbps) ??0000 ??0 Raise a grade Speed promotes a grade Speed promotes a grade ??0001-1110 ??1-14 Do not adjust Do not adjust Do not adjust ??1111 ??15 Lower a grade Grade of rate reduction Grade of rate reduction

Table 5

The indication of up AMR speed adjusted value, totally 4 bits, span is 0~15, and table 6, table 7 are two kinds of up AMR speed adjusted values indications and the corresponding table of AMR speed, and as shown in table 6, table 7, up AMR speed adjusted value is indicated corresponding one by one with AMR speed.

Up AMR speed adjusted value indication (binary system) Up AMR speed adjusted value indication (decimal system) AMR grade Arrowband AMR speed (kbps) Wideband A MR speed (kbps) ??0000 ??0 ??0 ??4.75 ??6.60 ??0001 ??1 ??1 ??5.15 ??8.85 ??0010 ??2 ??2 ??5.90 ??12.65 ??0011 ??3 ??3 ??6.70 ??14.25 ??0100 ??4 ??4 ??7.40 ??15.85 ??0101 ??5 ??5 ??7.95 ??18.25 ??0110 ??6 ??6 ??10.2 ??19.85 ??0111 ??7 ??7 ??12.2 ??23.05 ??1000 ??8 ??8 Do not adjust ??23.85 ??1001-1111 ??9-15 Reserved Do not adjust Do not adjust

Table 6

Up AMR speed adjusted value indication (binary system) Up AMR speed adjusted value indication (decimal system) AMR grade Arrowband AMR speed (kbps) Wideband A MR speed (kbps) ??0000 ??0 Raise a grade Speed promotes a grade Speed promotes a grade ??0001-1110 ??1-14 Do not adjust Do not adjust Do not adjust

??1111 ??15 Lower a grade Grade of rate reduction Grade of rate reduction

Table 7

All the other bits are all set to " 0 ".

The bit number of total bit number of this DCI 1A form DCI 1A during with conventional descending scheduling is identical.

DCI for single UE also can be used following form:

The highest order (MSB) of indicating for " modulation system encoding scheme and the redundancy versions " of DCI 0 form is set to " 1 ", represents that PDCCH order is speed adjustment order;

For DCI 1,1A, 2 and the highest order (MSB) of " modulation system encoding scheme " indication of 2A form be set to " 1 ", represent that PDCCH order is speed adjustment order;

Ceil (the log being indicated with low 4 bits (that is, the bit except MSB) and the resource block assignments of " modulation system encoding scheme " indication of 2A form by " modulation system encoding scheme and redundancy versions " indication of above-mentioned DCI 0 form and DCI 1,1A, 2 2(N rB dL(N rB dL+ 1)/2)) the indicated TB Size of bit maps out AMR speed grade.Table 8 is the TB Size of DCI 0/1/1A/2/2A form mandate and the corresponding table of arrowband AMR grade/speed, and table 9 is the TB Size of DCI 0/1/1A/2/2A form mandate and the corresponding table of wideband A MR grade/speed; As shown in table 8, table 9, TB Size and AMR grade, AMR speed are corresponding one by one.

Table 8

DCI 0,1,1A, 2 and the TB Size (bit) of 2A form mandate AMR grade Wideband A MR speed (kbps) ??208 ??0 ??6.60

??256 ??1 ??8.85 ??328 ??2 ??12.65 ??392 ??4 ??14.25 ??440 ??5 ??15.85 ??472 ??6 ??18.25 ??536 ??7 ??19.85 ??552 ??8 ??23.05 ??144 ??SID ??SID

Table 9

Here, wideband A MR can not be converted to arrowband AMR, and arrowband AMR can not be converted to wideband A MR, can only be in similar AMR interior change.

Form when all the other bits activate with semi-persistent scheduling is identical.

Below in conjunction with specific embodiment, further illustrate speech coder rate adaptation method of adjustment of the present invention

Embodiment 1:

The present embodiment take descending AMR-NB, for whole community, lower an AMR speed grade, use CL-RNTI not yet to reach minimum value as example to the AMR speed of PDCCH scrambling, UE.

Speech coder rate adaptation method of adjustment of the present invention comprises:

The physical layer of step 11, eNB produces according to the speech coder speed adjustment indication of MAC and launches PDCCH order;

The physical layer demodulation PDCCH of step 12, UE, obtains this PDCCH order;

Step 13, UE according to PDCCH order know that network requirement lowers an AMR speed grade, and the AMR speed of this UE not yet reaches minimum value, this UE lowers an AMR speed grade.

In above-mentioned steps 11, for the physical downlink control channel commands of cell-level, adopt DCI 1A form, use CL-RNTI to carry out scrambling simultaneously.CL-RNTI represents with 16 bits, and span is 0~65535, by eNB, is specified, and the value of getting CL-RNTI is here 65533, and 16 corresponding hex value are 0x FFFD.

DCI 1A form is as follows:

DCI 0 form and DCI 1A form diacritics, 1 bit, is set to " 1 ";

Centralized and distributed virtual resource block (VRB) sign, 1 bit, is set to " 1 ";

Resource block assignments indication, altogether Ceil (log 2(N rB dL(N rB dL+ 1)/2)) bit, is all set to " 1 ";

Arrowband AMR adjusts sign, and 1 bit, because need to lower a grade, is set to " 1 ";

Wideband A MR adjusts sign, and 1 bit, because not needing to adjust, therefore be set to " 0 ";

The indication of descending AMR speed adjusted value, totally 4 bits, because need to lower a grade, according to table 5, this 4 bit is set to " 1111 ";

The indication of up AMR speed adjusted value, totally 4 bits, because not needing adjustment, according to table 7, this 4 bit is set to " 0001 ";

All the other bits are all set to " 0 ".

The bit number of total bit number of this DCI 1A form DCI 1A during with conventional descending scheduling is identical.

Embodiment 2:

The present embodiment take descending AMR-WB, for single UE specify a 18.25kbps AMR speed grade, to adopt DCI 1 form, use SPS C-RNTI be example to PDCCH scrambling.

Speech coder rate adaptation method of adjustment of the present invention comprises:

The physical layer of step 21, eNB produces according to the speech coder speed adjustment indication of MAC and launches PDCCH order;

The physical layer demodulation PDCCH of step 22, UE, obtains this PDCCH order;

The speed that step 23, UE adjust speech coder according to this Physical Downlink Control Channel is 18.25kbps;

In this step, because wireless resource block (RB) number is 4, modulation coding mode (MCS) is 23, and TB Size is 472 bits, and AMR grade is 6, and the speed of corresponding speech coder is 18.25kbps.

In above-mentioned steps 21, adopt DCI 1 form transmitting PDCCH order, corresponding PDCCH order is placed on the exclusive district of CCE.PDCCH for single UE is used SPS C-RNTI to carry out scrambling.

DCI 1 form is as follows:

The highest order (MSB) of indicating for " the modulation system encoding scheme " of DCI 1 form is set to " 1 ".

According to table 9, TB Size corresponding to AMR that speed is 18.25kbps is 472 bits, the Ceil (log of low 4 bits of being indicated by " the modulation system encoding scheme " of above-mentioned DCI 1 form and resource block assignments indication 2(N rB dL(N rB dL+ 1)/2)) the indicated TB Size of bit is 472 bits (RB number is 4, and the decimal value of MCS is 23 (corresponding binary value is " 10111 ")).

DCI 1 form when all the other bits activate with semi-persistent scheduling is identical.

Embodiment 3

The present embodiment take descending AMR-NB, for single UE specify a 5.15kbps AMR speed grade, to use C-RNTI be example to PDCCH scrambling, referring to table 4.

Speech coder rate adaptation method of adjustment of the present invention comprises:

The physical layer of step 31, eNB produces according to the indication of MAC and launches the PDCCH order that comprises speech coder rate adjustment information;

The physical layer demodulation PDCCH of step 32, UE, obtains this PDCCH order;

Step 33, UE carry out the corresponding adjustment of speech coder speed according to this PDCCH order.

In above-mentioned steps 31, for the physical downlink control channel commands of single UE, adopt DCI 1A form, physical downlink control channel commands is placed on the exclusive district of CCE.This PDCCH is used Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI) to carry out scrambling.

In the present embodiment, DCI 1A form is as follows:

DCI 0 form and DCI 1A form diacritics, 1 bit, is set to " 1 ";

Centralized and distributed virtual resource block (VRB) sign, 1 bit, is set to " 1 ";

Resource block assignments indication, altogether Ceil (log 2(N rB dL(N rB dL+ 1)/2)) bit, is all set to " 1 ", and wherein, Ceil () rounds on representing, log 2() represents to get and take 2 be the end logarithm, N rB dLthe number that represents downlink resource piece;

Arrowband AMR adjusts sign, and 1 bit, because need to specify a grade, represents to need to adjust therefore be set to " 1 ";

Wideband A MR adjusts sign, and 1 bit, because not needing to adjust, therefore be set to " 0 ".

The indication of descending AMR speed adjusted value, totally 4 bits, because need to be appointed as this AMR speed grade of 5.15kbps, according to table 4, this 4 bit is set to " 0001 ".

The indication of up AMR speed adjusted value, totally 4 bits, because not needing adjustment, according to table 4, this 4 bit can be set to " 1111 ".

All the other bits are all set to " 0 ".

The bit number of total bit number of this DCI 1A form DCI 1A during with conventional descending scheduling is identical.

According to table 4, because arrowband AMR adjusts sign, be that " 1 " and the indication of descending AMR speed adjusted value are " 0001 ", the descending AMR speed of this UE is set to 5.15kbps.

The present invention also provides a kind of speech coder rate adaptation adjustment System, and for realizing above-mentioned speech coder rate adaptation method of adjustment, this system comprises: eNB and UE; Wherein,

ENB, for producing according to the indication on upper strata and launching the PDCCH order that comprises speech coder rate adjustment information;

UE comprises: channel demodulation unit, judging unit and AMR speed adjustment unit; Concrete:

Channel demodulation unit, for demodulation PDCCH, obtains this PDCCH order;

Judging unit, for judging whether current speech encoder rate has reached the adjustment limit, when not reaching the adjustment limit, sends and adjusts instruction to AMR speed adjustment unit; When reaching the adjustment limit, do not carry out any operation;

AMR speed adjustment unit, the adjustment instruction for sending according to judging unit, adjusts accordingly speech coder speed.

Visible, the inventive method and system can make LTE system support voice encoder rate adaptation function completely compatible with existing system well, thereby make LTE system obtain higher power system capacity, higher service quality is provided, takes full advantage of dispatch request information completely compatible with existing system.

The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.

Claims (14)

1. a speech coder rate adaptation method of adjustment, is characterized in that, the method comprises:
The physical layer of evolved base station eNB produces according to the indication on upper strata and launches the physical downlink control channel PDCCH order that comprises speech coder rate adjustment information;
The physical layer demodulation PDCCH of user equipment (UE), obtains described PDCCH order;
UE judges whether current speech encoder rate has reached the adjustment limit, if reach, UE does not carry out the adjustment of speech coder speed, and current operation flow process finishes; If do not reach, UE carries out the corresponding adjustment of speech coder speed according to described PDCCH order;
Described PDCCH order comprises the PDCCH order for cell-level, and the described PDCCH order for cell-level adopts Downlink Control Information DCI 1A form, and described DCI 1A form comprises:
DCI 0 form and DCI 1A form diacritics, 1 bit, is set to " 1 ";
Centralized and distributed virtual resource block sign, 1 bit, is set to " 1 ";
Resource block assignments indication, altogether Ceil (log 2( ( + 1)/2)) bit, is all set to " 1 ", and wherein, Ceil () rounds on representing, log 2() represents to get and take 2 logarithms that are the end, the number that represents downlink resource piece;
Narrowband self-adaption multi-speed AMR adjusts sign, and 1 bit, if be set to " 0 ", represents not adjust, if be set to " 1 ", represents to need to adjust;
Wideband A MR adjusts sign, and 1 bit represents not adjust if be set to " 0 ", if be set to " 1 ", represents to need to adjust;
The indication of descending AMR speed adjusted value, totally 4 bits, span is 0~15, wherein, descending AMR speed adjusted value indication is corresponding one by one with AMR speed;
The indication of up AMR speed adjusted value, totally 4 bits, span is 0~15, wherein, up AMR speed adjusted value indication is corresponding one by one with AMR speed;
All the other bits are all set to " 0 ".
2. speech coder rate adaptation method of adjustment according to claim 1, is characterized in that, described upper strata is media access control layer or radio resource control layer.
3. speech coder rate adaptation method of adjustment according to claim 2, is characterized in that, described PDCCH order also comprises the PDCCH order for single UE.
4. speech coder rate adaptation method of adjustment according to claim 3, is characterized in that, the described PDCCH order for single UE adopts DCI0 form, DCI1 form, DCI1A form, DCI2 form or DCI2A form.
5. speech coder rate adaptation method of adjustment according to claim 4, is characterized in that, the described public area of depositing in control channel Elements C CE for the PDCCH order of cell-level.
6. speech coder rate adaptation method of adjustment according to claim 5, is characterized in that, the described PDCCH order for cell-level adopts cell load Radio Network Temporary Identifier CL-RNTI to carry out scrambling.
7. speech coder rate adaptation method of adjustment according to claim 6, is characterized in that, described CL-RNTI represents with 16 bits, and span is 0~65535.
8. speech coder rate adaptation method of adjustment according to claim 7, is characterized in that, described CL-RNTI value is 65533.
9. speech coder rate adaptation method of adjustment according to claim 8, is characterized in that, public area or the exclusive district of CCE deposited in the described PDCCH order for single UE.
10. speech coder rate adaptation method of adjustment according to claim 9, is characterized in that, the described PDCCH order for single UE adopts Cell Radio Network Temporary Identifier/Identity, Cell-RNTI and/or semi-persistent scheduling Cell Radio Network Temporary Identifier/Identity, Cell-RNTI to carry out scrambling.
11. speech coder rate adaptation methods of adjustment according to claim 1, is characterized in that, the method also comprises: UE raises an AMR grade by dispatch request bit to eNB request, and dispatch request bit d (0) is set to zero.
12. 1 kinds of speech coder rate adaptation adjustment System, comprising: eNB and UE; It is characterized in that,
ENB, for producing according to the indication on upper strata and launching the PDCCH order that comprises speech coder rate adjustment information;
UE comprises: channel demodulation unit, judging unit and AMR speed adjustment unit; Concrete:
Channel demodulation unit, for demodulation PDCCH, obtains described PDCCH order;
Judging unit, for judging whether current speech encoder rate has reached the adjustment limit, when not reaching the adjustment limit, sends and adjusts instruction to AMR speed adjustment unit; When reaching the adjustment limit, do not carry out any operation;
AMR speed adjustment unit, the adjustment instruction for sending according to judging unit, adjusts accordingly speech coder speed;
Described PDCCH order comprises the PDCCH order for cell-level, and the described PDCCH order for cell-level adopts Downlink Control Information DCI1A form, and described DCI1A form comprises:
DCI0 form and DCI1A form diacritics, 1 bit, is set to " 1 ";
Centralized and distributed virtual resource block sign, 1 bit, is set to " 1 ";
Resource block assignments indication, altogether Ceil (log 2( ( + 1)/2)) bit, is all set to " 1 ", and wherein, Ceil () rounds on representing, log 2() represents to get and take 2 logarithms that are the end, the number that represents downlink resource piece;
Narrowband self-adaption multi-speed AMR adjusts sign, and 1 bit, if be set to " 0 ", represents not adjust, if be set to " 1 ", represents to need to adjust;
Wideband A MR adjusts sign, and 1 bit represents not adjust if be set to " 0 ", if be set to " 1 ", represents to need to adjust;
The indication of descending AMR speed adjusted value, totally 4 bits, span is 0~15, wherein, descending AMR speed adjusted value indication is corresponding one by one with AMR speed;
The indication of up AMR speed adjusted value, totally 4 bits, span is 0~15, wherein, up AMR speed adjusted value indication is corresponding one by one with AMR speed;
All the other bits are all set to " 0 ".
13. speech coder rate adaptation adjustment System according to claim 12, is characterized in that, described upper strata is media access control layer or radio resource control layer.
14. according to the speech coder rate adaptation adjustment System described in claim 12 or 13, it is characterized in that, described PDCCH order also comprises the PDCCH order for single UE.
CN200910088609.8A 2009-06-30 2009-06-30 Self-adaptive rate adjusting method and system for voice coder CN101938851B (en)

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