CN101959255B - Method, system and device for regulating rate of voice coder - Google Patents
Method, system and device for regulating rate of voice coder Download PDFInfo
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- CN101959255B CN101959255B CN 200910158583 CN200910158583A CN101959255B CN 101959255 B CN101959255 B CN 101959255B CN 200910158583 CN200910158583 CN 200910158583 CN 200910158583 A CN200910158583 A CN 200910158583A CN 101959255 B CN101959255 B CN 101959255B
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Abstract
The invention discloses a method for regulating the rate of a voice coder, which is used in a long term evolution (LTE) mobile communication system for enabling the LTE system to support the rate self-adapting function of the voice coder and to be compatible with the conventional system. In the method, a base station generates a first control element for regulating the rate of a voice coder, transmits the first control element and allows a terminal to regulate the rate of the voice coder according to the first control element. The invention also discloses a base station and a system for regulating the rate of the voice coder.
Description
Technical field
The present invention relates to Long Term Evolution (Long Term Evolution, LTE) mobile communication system field, particularly a kind of method, system and device of adjusting speech coder speed.
Background technology
According to 3G (Third Generation) Moblie partner program (3rd Generation Partnership Project, motion RP-090660 3GPP) (" Vocoder rate adaptation for LTE "), LTE is about to increase speech coder rate adaptation function, be in the LTE system, the speech coder speed of terminal can according to the operating position of network, be adjusted in the base station.But 3GPP not yet defines how to add speech coder rate adaptation function in new standard at present.
According to 3GPP TS26.101 V8.0.0, (the Voice overInternet Protocol of the speech based on Internet Protocol of present LTE, VoIP) a kind of in narrowband self-adaption multi-speed (AMR-NB) Multi-encoding device can be used, a kind of in the many speed of wideband adaptive (AMR-WB) Multi-encoding device can also be used.Wherein, the AMR-NB speed grade is as shown in table 1, and the AMR-WB speed grade is as shown in table 2.
Table 1
Table 2
For making the LTE system can support voice encoder rate adaptation function, and compatible existing LTE system, need to propose the processing method of speech coder rate adaptation, namely adjust the method for speech coder speed.
Summary of the invention
The embodiment of the present invention provides a kind of method of adjusting speech coder speed, can make LTE system support voice encoder rate adaptation function, and fully compatible with existing system.
The embodiment of the present invention provides a kind of method of adjusting speech coder speed, comprising:
The base station produces the first control element of adjusting speech coder speed;
Launch described the first control element, make the PDCCH of terminal described first control element information of search indication in the public area of CCE or exclusive district, decode the PDSCH that comprises the first control element information according to described PDCCH, and parse described the first control element from described PDSCH, thereby according to described the first control element, adjust the speed of speech coder.
The embodiment of the present invention provides a kind of system that adjusts speech coder speed, comprising:
Described the first control element for generation of the first control element of adjusting speech coder speed, is launched in the base station;
Terminal, be used in the public area of CCE or the PDCCH of described the first control element information of exclusive district search indication, decode the PDSCH that comprises the first control element information according to described PDCCH, and parse described the first control element from described PDSCH, and according to described the first control element, adjust the speed of speech coder.
The embodiment of the present invention provides a kind of base station of adjusting speech coder speed, comprising:
Generation unit is for generation of the first control element of adjusting speech coder speed;
Transmitter unit, be used for launching described the first control element, make the PDCCH of terminal described first control element information of search indication in the public area of CCE or exclusive district, decode the PDSCH that comprises the first control element information according to described PDCCH, and parse described the first control element from described PDSCH, thereby according to described the first control element, adjust the speed of speech coder.
The embodiment of the present invention provides a kind of terminal of adjusting speech coder speed, comprising:
Acquiring unit is used for obtaining the first control element of the adjustment speech coder speed that the base station issues; Wherein, described acquiring unit comprises:
The search subelement is used in the public area of CCE or the PDCCH of described the first control element information of exclusive district search indication;
Resolve subelement, be used for decoding according to described PDCCH the PDSCH that comprises the first control element information, and parse described the first control element from described PDSCH;
Adjustment unit is used for according to described the first control element, adjusts the speed of speech coder.
The embodiment of the present invention provides LTE system adjusts in the method for speech coder speed, the base station produces the first control element of adjusting speech coder speed, launch described the first control element, make terminal according to described the first control element, adjust the speed of speech coder, thereby make LTE system support voice encoder rate adaptation function well, and fully compatible with existing system.
Description of drawings
Fig. 1 adjusts the method flow diagram of speech coder speed in the embodiment of the present invention;
Fig. 2 (a) is the schematic diagram of MAC CE the first form in the embodiment of the present invention;
Fig. 2 (b) is the schematic diagram of MAC CE the second form in the embodiment of the present invention;
Fig. 2 (c) is the schematic diagram of MAC CE the second form in the embodiment of the present invention;
Fig. 3 adjusts the method flow diagram of speech coder speed in first embodiment of the invention;
Fig. 4 adjusts the method flow diagram of speech coder speed in second embodiment of the invention;
Fig. 5 is architecture of base station schematic diagram in the embodiment of the present invention;
Fig. 6 is terminal structure schematic diagram in the embodiment of the present invention.
Embodiment
The embodiment of the present invention provides a kind of method of adjusting speech coder speed, can make LTE system support voice encoder rate adaptation function, and fully compatible with existing system.
6.1.3 joint according to 3GPP TS 36.321 V8.6.0, the media access control layer of base station (eNB) (Media Access Control, MAC) can give subscriber equipment, be terminal (User Equipment, UE) emission MAC control element (MAC Control Element,, MAC CE) and to control the behavior of UE.UE also can launch MAC CE to apply for certain Radio Resource to eNB.According to this agreement, make the LTE system can support voice encoder rate adaptation function, the process of namely adjusting speech coder speed is as follows, referring to Fig. 1:
Step 101:eNB produces the first control element of adjusting speech coder speed.
Here, the MAC layer of eNB produces according to high level or the judgment criterion of oneself the first control element of adjusting speech coder speed, namely produces to be used for speech encoding rate adaptation function MAC CE.The form of this MACC E can be as shown in Fig. 2 (a), Fig. 2 (b) and Fig. 2 (c) any one, be to comprise one or more reservation bits " R ", a descending adjustment bit " D ", a up adjustment bit " U " in MAC CE, and AMR broadband or narrow band information bit " B ", " WB ", or " NB ", certainly can also comprise one group of AMR rate information bit " Speed of Voice Codec " in MAC CE, be used to specify the AMR grade that UE should use; Can comprise that perhaps one or more AMR speed adjust bits " A ", be used to specify the lifting that UE should use or reduce an AMR grade.
Step 102:eNB launches the first control element.
The MAC layer of eNB is transferred to this MAC CE the physical layer of eNB, and the physical layer of eNB is launched this this MAC CE.
Here, when MAC CE is MAC CE for cell-level, use Downlink Control Information (DCI) 1A, 1C or other DCI forms remove to indicate Physical Downlink Shared Channel (Physical Downlink SharedChannel, PDSCH) carry this MAC CE, the Physical Downlink Control Channel corresponding with PDSCH (PacketDedicated Control Channel, PDCCH) is placed on the public area of control channel element (CCE).PDCCH and corresponding PDSCH for cell-level use cell load Radio Network Temporary Identifier (CL-RNTI) or other Radio Network Temporary Identifiers to carry out scrambling.Wherein, CL-RNTI represents with 16 bits, and span is 0～65535, is specified by eNB.
When MAC CE is MAC CE for single UE, carry this MAC CE with DCI 1A or other DCI forms indication PDSCH, the PDCCH corresponding with PDSCH is placed on public area or the exclusive district of CCE.PDCCH and corresponding PDSCH for single UE use Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI) or other Radio Network Temporary Identifiers to carry out scrambling.
Step 103:UE obtains the first control element.
At first, the physical layer of UE is indicated the PDCCH of this MAC CE information in public area or the exclusive district search of CCE, and then, UE decodes according to the PDCCH of this MAC CE information of indication that searches the PDSCH that comprises this MACCE information; At last, the MAC layer of UE parses this MAC CE from PDSCH.
Step 104:UE adjusts the speed of speech coder according to this first control element.
Here, in adjustment process, if increasing amount adjustment and arrived maximum or minimum value need not be adjusted.
Certainly, in the embodiment of the present invention, UE can also send the second control element that speech coder speed is adjusted in request to eNB, and namely the MAC layer of UE changes the speed of speech coder to eNB emission MAC CE request.The form of this MAC CE also can be as shown in Fig. 2 (a), Fig. 2 (b) and Fig. 2 (c) any.Wherein, before or after UE process from the second control element to eNB that send can occur in above-mentioned steps 101,102,103,104.
Below in conjunction with Figure of description, the embodiment of the present invention is described in further detail.
In embodiment one, the present embodiment, that the VoIP of LTE uses is AMR-NB, existing AMR speed grade of descending downward that needs for whole residential quarter, and the AMR speed of UE not yet reaches minimum value, wherein, uses CL-RNTI to PDCCH and PDSCH scrambling.Referring to Fig. 3, the process of lowering speech coder speed comprises:
The MAC layer of step 301:eNB produces for speech coder rate adaptation function MAC CE according to high level or the judgment criterion of oneself.The form of this MAC CE is as shown in Fig. 2 (b).
In this MAC CE, the bit that " R " expression is continued to employ in advance, acquiescence is got " 0 "." D " expression operates descending AMR speed grade, if get " 1 ", expression eNB has operation to descending AMR, otherwise without operation." U " expression operates up AMR speed grade, if get " 1 ", expression eNB has operation to up AMR, otherwise without operation." WB " represents whether this MAC CE has operation for AMR-WB, if get " 1 ", expression eNB has operation to AMR-WB, otherwise without operation." NB " represents whether this MAC CE has operation for AMR-NB, if get " 1 ", expression eNB has operation to AMR-NB, otherwise without operation.The adjustment of " A " expression speed is applied to AMR-NB and AMR-WB simultaneously, if get " 1 ", expression is lowered a grade to AMR speed, for example: reduce to AMR10.2 from AMR12.2; If get " 0 ", expression is raised a grade to AMR speed, for example: be upgraded to AMR8.85 from AMR6.6.
Here can suppose that eNB has produced MAC CE " 00010111 " (binary value).
The MAC layer of step 302:eNB is transferred to this MAC CE the physical layer of eNB.
The physical layer of step 303:eNB is launched this MAC CE.
MAC CE is the MAC CE for cell-level, therefore, can use DCI 1A, 1C, or other DCI forms go to indicate PDSCH to carry this MAC CE, suppose here with DCI1C and go indication.
The PDCCH corresponding with PDSCH is placed on the public area of CCE, uses CL-RNTI to carry out scrambling to this PDCCH and corresponding PDSCH.It is 65533 that eNB specifies CL-RNTI, and 16 hex value of its correspondence are 0x FFFD.
The physical layer of step 304:UE is indicated the PDCC H of this MAC CE information in public area or the exclusive district search of CCE, and the PDCCH that uses CL-RNTI to go descrambling to search out.
Step 305:UE decodes according to the PDCCH of this MAC CE information of indication that searches the PDSCH that comprises this MACCE information.Equally, use CL-RNTI to remove descrambling in decode procedure.
The MAC layer of step 306:UE parses this MAC CE " 00010111 ".
Step 307:UE adjusts the speed of speech coder according to this MAC CE.
Here, due to eNB set on " D " bit, pretend and use descending AMR.And, eNB set on " A " bit, as seen, the AMR grade is increasing amount adjustment, in the present embodiment, the AMR speed of UE not yet reaches minimum value, therefore UE lowers grade of speed of speech coder.
Certainly, in the present embodiment, the MAC layer of UE can also be launched the speed that MAC CE request changes speech coder to eNB.The form of this MAC CE can be as shown in Fig. 2 (a).This emission process is independent of step 301～step 307, before or after can occurring in wherein any one.
In embodiment two, the present embodiment, what the VoIP of LTE used is to specify a descending AMR speed grade with AMR-WB, the existing need for single UE, wherein, uses C-RNTI to PDCCH and PDSCH scrambling.Referring to Fig. 4, the process of adjusting speech coder speed comprises:
The MAC layer of step 401:eNB produces for speech coder rate adaptation function MAC CE according to high level or the judgment criterion of oneself.The form of this MAC CE is as shown in Fig. 2 (a).
In this MAC CE, the bit that " R " expression is continued to employ in advance, acquiescence is got " 0 "." D " expression operates descending AMR speed grade, if get " 1 ", expression eNB has operation to descending AMR, otherwise without operation." U " expression operates up AMR speed grade, if get " 1 ", expression eNB has operation to up AMR, otherwise without operation." B " represents that this MAC CE is for AMR-WB or AMR-NB, if get " 1 ", expression eNB has operation to AMR-WB, otherwise eNB has operation to AMR-NB.The speed grade of AMR rate information " Speed of Voice Codec " expression AMR, concrete form can be as shown in table 3:
Table 3
Here, suppose that the AMR grade that eNB will arrange this UE is arrowband AMR7.95, produce a MAC CE and be " 00010101 ".
The MAC layer of step 402:eNB is transferred to this MAC CE the physical layer of eNB.
The physical layer of step 403:eNB is launched this MAC CE.
Because this MAC CE is MAC CE for single UE, so go to indicate PDSCH to carry this MAC CE with DCI 1A or other DCI forms, supposition here removes to indicate PDSCH with DCI 1A.Corresponding PDCCH is placed on the exclusive district of CCE.Use C-RNTI to carry out scrambling to this PDCCH and corresponding PDSCH.
The physical layer of step 404:UE is indicated the PDCCH of this MAC CE information in public area or the exclusive district search of CCE.And the PDCCH that uses C-RNTI to go descrambling to go descrambling to search out.
Step 405:UE decodes according to the PDCCH of this MAC CE information of indication that searches the PDSCH that comprises this MAC CE information.Equally, use C-RNTI to remove descrambling in decode procedure.
The MAC layer of step 406:UE parses this MAC CE " 00010101 ".
Step 407:UE adjusts the speed of speech coder according to this MAC CE.
Due to eNB set on " D " bit, pretend and use descending AMR; Due to eNB reset on " B " bit, representing has operation to AMR-WB, and using absolute value adjustment and AMR grade is " 0101 ", and its corresponding decimal value is 5, and according to table 3, the speed that UE arranges speech coder is arrowband AMR7.95.
The MAC layer of step H:UE changes the speed of speech coder to eNB emission MAC CE request.The form of this MAC CE as shown in Figure 1.
Certainly, in the present embodiment, the MAC layer of UE can also be launched the speed that MAC CE request changes speech coder to eNB.The form of this MAC CE can be as shown in Fig. 2 (a).This emission process is independent of step 401～step 407, before or after can occurring in wherein any one.
In the LTE system of above-mentioned support voice encoder rate adaptation function, comprise base station and terminal, wherein,
Described the first control element for generation of the first control element of adjusting speech coder speed, is launched in the base station.
Terminal is used for according to described the first control element, adjusts the speed of speech coder.
When described the first control element is control element for cell-level, this base station also is used for going to indicate PDSCH to carry described the first control element with DCI1A or 1C or other DCI forms, and the PDCCH that described PDSCH is corresponding is placed on the public area of CCE, use CL-RNTI or other Radio Network Temporary Identifiers, described PDCCH and corresponding PDSCH are carried out scrambling.
When described the first control element is control element for single terminal, this base station also is used for going to indicate PDSCH to carry described the first control element with DCI1A or other DCI forms, and the PDCCH that described PDSCH is corresponding is placed on public area or the exclusive district of CCE, uses C-RNTI or other Radio Network Temporary Identifiers to carry out scrambling to PDCCH and corresponding PDSCH.
This terminal also is used in the public area of CCE or the PDCCH of described the first control element information of exclusive district search indication, decodes the PDSCH that comprises the first control element information according to described PDCCH, and parse described the first control element from described PDSCH.
Certainly, the embodiment of the present invention is adjusted in the system of speech coder speed, and terminal can also send the second control element that speech coder speed is adjusted in request to described base station.
Referring to Fig. 5, the base station of using in the LTE system comprises: generation unit 510 and transmitter unit 520.Wherein,
Generation unit 510 is for generation of the first control element of adjusting speech coder speed.
Transmitter unit 520 is used for launching described the first control element.
When described the first control element is control element for cell-level, transmitter unit 520 use DCI form 1A or 1C or other DCI forms go to indicate Physical Downlink Shared Channel PDSCH to carry described the first control element, the PDCCH that described PDSCH is corresponding is placed on the public area of CCE, and uses CL-RNTI or other Radio Network Temporary Identifiers to carry out scrambling to described PDCCH and corresponding PDSCH.
When described the first control element is control element for single terminal, transmitter unit 520 use DCI1A or other DCI forms go to indicate PDSCH to carry described the first control element, the PDCCH that described PDSCH is corresponding is placed on public area or the exclusive district of CCE, and uses C-RNTI or other Radio Network Temporary Identifiers to carry out scrambling to described PDCCH and corresponding PDSCH.
Referring to Fig. 6, the terminal of using in the LTE system comprises: acquiring unit 610 and adjustment unit 620.Wherein,
Acquiring unit 610 is used for obtaining the first control element of the adjustment speech coder speed that the base station issues.
Acquiring unit 610 is the PDCCH of described the first control element information of search indication in the public area of CCE or exclusive district at first, then, decode the PDSCH that comprises the first control element information according to described PDCCH, and parse described the first control element from described PDSCH.
Certainly, in the embodiment of the present invention, terminal also comprises: transmitting element is used for sending to described base station the second control element that speech coder speed is adjusted in request.
In sum, embodiment of the present invention LTE system adjusts in the process of speech coder speed, the base station produces the first control element of adjusting speech coder speed, launch described the first control element, make terminal according to described the first control element, adjust the speed of speech coder, like this, the LTE system can obtain higher power system capacity, improve higher service order, thereby makes LTE system support voice encoder rate adaptation function well, and fully compatible with existing system.
Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if of the present invention these are revised and within modification belongs to the scope of claim of the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.
Claims (14)
1. a method of adjusting speech coder speed, is characterized in that, comprising:
The base station produces the first control element of adjusting speech coder speed;
Launch described the first control element, make the PDCCH of terminal described first control element information of search indication in the public area of CCE or exclusive district, decode the PDSCH that comprises the first control element information according to described PDCCH, and parse described the first control element from described PDSCH, thereby according to described the first control element, adjust the speed of speech coder.
2. the method for claim 1, it is characterized in that, described the first control element comprises: descending adjustment bit, up adjustment bit, adaptive multi-rate AMR broadband or narrow band information bit, AMR rate information bit, AMR speed are adjusted one or more in bit and reserved bit.
3. the method for claim 1, is characterized in that, when described the first control element was control element for cell-level, described the first control element of described emission comprised:
Go to indicate Physical Downlink Shared Channel PDSCH to carry described the first control element with Downlink Control Information DCI 1A, 1C or other DCI forms except DCI 1A, 1C, and the physical downlink control channel PDCCH that described PDSCH is corresponding is placed on the public area of control channel Elements C CE;
Use cell load Radio Network Temporary Identifier CL-RNTI or other Radio Network Temporary Identifiers, described PDCCH and corresponding PDSCH are carried out scrambling.
4. the method for claim 1, is characterized in that, when described the first control element was control element for single terminal, described the first control element of described emission comprised:
Go to indicate PDSCH to carry described the first control element with DCI 1A or other DCI forms except DCI 1A, and the PDCCH that described PDSCH is corresponding is placed on public area or the exclusive district of CCE;
Use Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI or other Radio Network Temporary Identifiers, described PDCCH and corresponding PDSCH are carried out scrambling.
5. the method for claim 1, is characterized in that, also comprises:
Terminal sends to described base station the second control element that speech coder speed is adjusted in request.
6. a system that adjusts speech coder speed, is characterized in that, comprising:
Described the first control element for generation of the first control element of adjusting speech coder speed, is launched in the base station;
Terminal, be used in the public area of CCE or the PDCCH of described the first control element information of exclusive district search indication, decode the PDSCH that comprises the first control element information according to described PDCCH, and parse described the first control element from described PDSCH, and according to described the first control element, adjust the speed of speech coder.
7. system as claimed in claim 6, is characterized in that, comprising:
Described base station, also be used for when described the first control element is control element for cell-level, go to indicate PDSCH to carry described the first control element with DCI 1A, 1C or other DCI forms except DCI 1A, 1C, and the PDCCH that described PDSCH is corresponding is placed on the public area of CCE, use CL-RNTI or other Radio Network Temporary Identifiers, described PDCCH and corresponding PDSCH are carried out scrambling.
8. system as claimed in claim 6, is characterized in that, comprising:
Described base station, also be used for when described the first control element is control element for single terminal, go to indicate PDSCH to carry described the first control element with DCI 1A or other DCI forms except DCI 1A, and PDCCH corresponding to described PDS CH is placed on public area or the exclusive district of CCE, use C-RNTI or other Radio Network Temporary Identifiers to carry out scrambling to PDCCH and corresponding PDSCH.
9. system as claimed in claim 6, is characterized in that, comprising:
Described terminal also is used for sending to described base station the second control element that speech coder speed is adjusted in request.
10. a base station of adjusting speech coder speed, is characterized in that, comprising:
Generation unit is for generation of the first control element of adjusting speech coder speed;
Transmitter unit, be used for launching described the first control element, make the PDCCH of terminal described first control element information of search indication in the public area of CCE or exclusive district, decode the PDSCH that comprises the first control element information according to described PDCCH, and parse described the first control element from described PDSCH, thereby according to described the first control element, adjust the speed of speech coder.
11. base station as claimed in claim 10 is characterized in that, when described the first control element was control element for cell-level, described transmitter unit comprised:
The first indication subelement is used for going to indicate PDSCH to carry described the first control element with DCI 1A, 1C or other DCI forms except DCI 1A, 1C;
First deposits subelement, is used for the public area that the PDCCH that described PDSCH is corresponding is placed on CCE;
The first scrambling subelement is used for using CL-RNTI or other Radio Network Temporary Identifiers to carry out scrambling to described PDCCH and corresponding PDSCH.
12. base station as claimed in claim 10 is characterized in that, when described the first control element was control element for single terminal, described transmitter unit comprised:
The second indication subelement is used for going to indicate PDSCH to carry described the first control element with DCI 1A or other DCI forms except DCI 1A;
Second deposits subelement, is used for public area or exclusive district that the PDCCH that described PDSCH is corresponding is placed on CCE;
The second scrambling subelement is used for using C-RNTI or other Radio Network Temporary Identifiers to carry out scrambling to described PDCCH and corresponding PDSCH.
13. a terminal of adjusting speech coder speed is characterized in that, comprising:
Acquiring unit is used for obtaining the first control element of the adjustment speech coder speed that the base station issues; Wherein, described acquiring unit comprises:
The search subelement is used in the public area of CCE or the PDCCH of described the first control element information of exclusive district search indication;
Resolve subelement, be used for decoding according to described PDCCH the PDSCH that comprises the first control element information, and parse described the first control element from described PDSCH;
Adjustment unit is used for according to described the first control element, adjusts the speed of speech coder.
14. terminal as claimed in claim 13 is characterized in that, also comprises:
Transmitting element is used for sending to described base station the second control element that speech coder speed is adjusted in request.
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| JP4263412B2 (en) * | 2002-01-29 | 2009-05-13 | 富士通株式会社 | Speech code conversion method |
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| CN1991977A (en) * | 2005-12-29 | 2007-07-04 | Ut斯达康通讯有限公司 | Voice coding rate confirming method for radio communication |
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| CN101212459A (en) * | 2006-12-28 | 2008-07-02 | 华为技术有限公司 | Method, system, and device for controlling media code rate |
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