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1、 TIA STANDARD VoIP Codecs and protocols for cdma2000 Spread Spectrum Systems TIA-1122 August 2007 TELECOMMUNICATIONS INDUSTRY ASSOCIATION Representing the telecommunications industry in association with the Electronic Industries Alliance Copyright Telecommunications Industry Association Provided by
2、IHS under license with EIALicensee=HP Monitoring/1111111164 Not for Resale, 04/07/2009 22:57:24 MDTNo reproduction or networking permitted without license from IHS -,-,- NOTICE TIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings
3、between manufacturers and purchasers, facilitating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for their particular need. The existence of such Standards and Publications shall not in any respect preclud
4、e any member or non-member of TIA from manufacturing or selling products not conforming to such Standards and Publications. Neither shall the existence of such Standards and Publications preclude their voluntary use by Non-TIA members, either domestically or internationally. Standards and Publicatio
5、ns are adopted by TIA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, TIA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the Standard or Publication. This Standard does not purport t
6、o address all safety problems associated with its use or all applicable regulatory requirements. It is the responsibility of the user of this Standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations before its use. (From Project No. 3
7、-0273, formulated under the cognizance of the TIA TR-45 Mobile (b) there is no assurance that the Document will be approved by any Committee of TIA or any other body in its present or any other form; (c) the Document may be amended, modified or changed in the standards development or any editing pro
8、cess. The use or practice of contents of this Document may involve the use of intellectual property rights (“IPR”), including pending or issued patents, or copyrights, owned by one or more parties. TIA makes no search or investigation for IPR. When IPR consisting of patents and published pending pat
9、ent applications are claimed and called to TIAs attention, a statement from the holder thereof is requested, all in accordance with the Manual. TIA takes no position with reference to, and disclaims any obligation to investigate or inquire into, the scope or validity of any claims of IPR. TIA will n
10、either be a party to discussions of any licensing terms or conditions, which are instead left to the parties involved, nor will TIA opine or judge whether proposed licensing terms or conditions are reasonable or non-discriminatory. TIA does not warrant or represent that procedures or practices sugge
11、sted or provided in the Manual have been complied with as respects the Document or its contents. If the Document contains one or more Normative References to a document published by another organization (“other SSO”) engaged in the formulation, development or publication of standards (whether design
12、ated as a standard, specification, recommendation or otherwise), whether such reference consists of mandatory, alternate or optional elements (as defined in the TIA Engineering Manual, 4th edition) then (i) TIA disclaims any duty or obligation to search or investigate the records of any other SSO fo
13、r IPR or letters of assurance relating to any such Normative Reference; (ii) TIAs policy of encouragement of voluntary disclosure (see Engineering Manual Section 6.5.1) of Essential Patent(s) and published pending patent applications shall apply; and (iii) Information as to claims of IPR in the reco
14、rds or publications of the other SSO shall not constitute identification to TIA of a claim of Essential Patent(s) or published pending patent applications. TIA does not enforce or monitor compliance with the contents of the Document. TIA does not certify, inspect, test or otherwise investigate produ
15、cts, designs or services or any claims of compliance with the contents of the Document. ALL WARRANTIES, EXPRESS OR IMPLIED, ARE DISCLAIMED, INCLUDING WITHOUT LIMITATION, ANY AND ALL WARRANTIES CONCERNING THE ACCURACY OF THE CONTENTS, ITS FITNESS OR APPROPRIATENESS FOR A PARTICULAR PURPOSE OR USE, IT
16、S MERCHANTABILITY AND ITS NONINFRINGEMENT OF ANY THIRD PARTYS INTELLECTUAL PROPERTY RIGHTS. TIA EXPRESSLY DISCLAIMS ANY AND ALL RESPONSIBILITIES FOR THE ACCURACY OF THE CONTENTS AND MAKES NO REPRESENTATIONS OR WARRANTIES REGARDING THE CONTENTS COMPLIANCE WITH ANY APPLICABLE STATUTE, RULE OR REGULATI
17、ON, OR THE SAFETY OR HEALTH EFFECTS OF THE CONTENTS OR ANY PRODUCT OR SERVICE REFERRED TO IN THE DOCUMENT OR PRODUCED OR RENDERED TO COMPLY WITH THE CONTENTS. Copyright Telecommunications Industry Association Provided by IHS under license with EIALicensee=HP Monitoring/1111111164 Not for Resale, 04/
18、07/2009 22:57:24 MDTNo reproduction or networking permitted without license from IHS -,-,- TIA SHALL NOT BE LIABLE FOR ANY AND ALL DAMAGES, DIRECT OR INDIRECT, ARISING FROM OR RELATING TO ANY USE OF THE CONTENTS CONTAINED HEREIN, INCLUDING WITHOUT LIMITATION ANY AND ALL INDIRECT, SPECIAL, INCIDENTAL
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20、TION OF DAMAGES IS A FUNDAMENTAL ELEMENT OF THE USE OF THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. Copyright Telecommunications Industry Association Provided by IHS under license with EIALicensee=HP Monitoring/1111111164 Not for Resale, 04/07/2009
21、22:57:24 MDTNo reproduction or networking permitted without license from IHS -,-,- TIA 1122 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 ii Preface This technical specification rec
22、ommends codecs and protocol configuration for VoIP over HRPD Rev A. Copyright Telecommunications Industry Association Provided by IHS under license with EIALicensee=HP Monitoring/1111111164 Not for Resale, 04/07/2009 22:57:24 MDTNo reproduction or networking permitted without license from IHS -,-,-
23、TIA 1122 1 Contents Contents.1 Foreword .2 1 Introduction.3 2 References.4 3 Definitions, Symbols and Abbreviations 5 3.1 Symbols and Abbreviations.5 4 SDP Offer/Answer6 5 Media.7 5.1 Voice7 5.1.1 Narrowband7 5.1.2 Wideband .7 5.2 VoIP Transport7 5.2.1 RTP Header and Packetization .7 5.2.2 Header Co
24、mpression .7 6 HRPD Rev A System Configuration for VoIP Flow9 6.1 RLP (Radio Link Protocol) Configuration9 6.2 RLMAC (Reverse Link Medium Access Control) Configuration 10 7 HRPD Rev A System Configuration for SIP Flow 13 7.1 RLP (Radio Link Protocol) Configuration13 7.2 RLMAC (Reverse Link Medium Ac
25、cess Control) Configuration 14 8 QoS Configuration/Activation.15 Copyright Telecommunications Industry Association Provided by IHS under license with EIALicensee=HP Monitoring/1111111164 Not for Resale, 04/07/2009 22:57:24 MDTNo reproduction or networking permitted without license from IHS -,-,- TIA
26、 1122 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 2 Foreword This technical specification recommends codecs as well as protocol configuration for efficient support of VoIP over HR
27、PD Rev A. Copyright Telecommunications Industry Association Provided by IHS under license with EIALicensee=HP Monitoring/1111111164 Not for Resale, 04/07/2009 22:57:24 MDTNo reproduction or networking permitted without license from IHS -,-,- TIA 1122 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 2
28、0 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 3 1 Introduction This specification includes recommendations for VoIP codecs as well as protocol configuration to enable efficient support of VoIP over HRPD Rev A. VoIP codecs are chos
29、en from existing 3GPP2 technologies keeping in mind system efficiency as well as quality considerations. Recommendations are provided for transport protocols as well as for 3GPP2-specific system parameter settings for RoHC, RLP and RLMAC. Copyright Telecommunications Industry Association Provided by
30、 IHS under license with EIALicensee=HP Monitoring/1111111164 Not for Resale, 04/07/2009 22:57:24 MDTNo reproduction or networking permitted without license from IHS -,-,- TIA 1122 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
31、44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 4 2 References The following standards are referenced in this text. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based upon this document are encouraged to investigate the
32、possibility of applying the most recent editions of the standards indicated below. ANSI and TIA maintain registers of currently valid national standards published by them. 1 TIA-127-B, “Enhanced Variable Rate Codec, Speech Service Options 3 and 68 for Wideband Spread Spectrum Digital Systems” 2 TIA-
33、127-A, “Enhanced Variable Rate Codec, Speech Service Option 3 for Wideband Spread Spectrum Digital Systems” 3 TIA-127-C, “Enhanced Variable Rate Codec, Speech Service Options 3, 68 and 70 for Wideband Spread Spectrum Digital Systems”, February 2007. 4 IETF RFC 3095, Borman, et al, “RObust Header Com
34、pression (ROHC): Framework and four profiles: RTP, UDP, ESP, and uncompressed”, July 2001. 5 TIA-924, “Packet Switched Video Telephony Services (PSVT/MCS)”, March 2007. 6 TIA-856-A, “cdma2000 High Rate Packet Data Air Interface Specification”, August 2005. 7 IETF RFC 3264, Rosenberg and Schulzrinne,
35、 “An Offer/Answer Model with the Session Description Protocol (SDP)”, June 2002. 8 TIA-873.004-A, “All-IP Core Network Multimedia Domain: IP Multimedia Call Control Protocol Based on SIP and SDP Stage 3”, November 2005. 9 TIA 1095, “Discontinuous Transmission (DTX) of Speech in cdma2000 Systems” Cop
36、yright Telecommunications Industry Association Provided by IHS under license with EIALicensee=HP Monitoring/1111111164 Not for Resale, 04/07/2009 22:57:24 MDTNo reproduction or networking permitted without license from IHS -,-,- TIA 1122 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
37、 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 5 3 Definitions, Symbols and Abbreviations This section contains definitions, symbols and abbreviations that are used throughout the document. 3.1 Symbols and Abbreviations 3GPP2 3rd Generation Par
38、tnership Project 2 E-MFPA Enhanced Multi Flow Packet Application EVRC Enhanced Variable Rate Codec EVRC-B Enhanced Variable Rate Codec-B EVRC-WB Enhanced Variable Rate Codec- Wideband HRPD High Rate Packet Data IP Internet Protocol IP-ID Internet Protocol Identifier MAC Medium Access Control QoS Qua
39、lity of Service RFC Request for Comments RLMAC Reverse Link Medium Access Control RLP Radio Link Protocol RoHC Robust Header Compression RS-1 Rate Set-1 RTP Real Time Protocol SIP Session Initiation Protocol UDP User Datagram Protocol VoIP Voice over Internet Protocol Copyright Telecommunications In
40、dustry Association Provided by IHS under license with EIALicensee=HP Monitoring/1111111164 Not for Resale, 04/07/2009 22:57:24 MDTNo reproduction or networking permitted without license from IHS -,-,- TIA 1122 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
41、34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 6 4 SDP Offer/Answer The SDP offer typically contains at least one audio media line (m=) offering one or more RTP payload formats. For each media line, the codecs are listed in order of decreasing preference with the most pre
42、ferred codec listed first. The SDP answer for each audio media line (m=) typically contains only one codec format, i.e., the first codec format in the offer that can be used by the answering VoIP Terminal for the VoIP session. The selection of the voice codec and any parameters (for example 9) assoc
43、iated with the codec used in a VoIP call shall follow 7 for non-IMS call control scenarios and 8 for IMS call control scenarios. Copyright Telecommunications Industry Association Provided by IHS under license with EIALicensee=HP Monitoring/1111111164 Not for Resale, 04/07/2009 22:57:24 MDTNo reprodu
44、ction or networking permitted without license from IHS -,-,- TIA 1122 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 7 5 Media 5.1 Voice 5.1.1 Narrowband Narrowband-only VoIP termina
45、ls shall support EVRC-B 1 and EVRC 2 codecs. EVRC-B is the default and most preferred voice codec for these VoIP terminals. The audio m-lines of the SDP offer shall contain EVRC-B as one of the offered codecs. 5.1.2 Wideband Wideband-capable VoIP terminals shall support EVRC-WB 3 in addition to EVRC
46、-B and EVRC codecs. EVRC-WB is the default and most preferred codec for wideband-capable VoIP terminals. The audio m-lines of the SDP offer shall contain EVRC-WB as one of the offered codecs. 5.2 VoIP Transport 5.2.1 RTP Header and Packetization Maintaining low end-to-end delays is important for VoI
47、P. Thus, a VoIP terminal shall send VoIP frames without any bundling, i.e., each speech frame in a separate RTP packet. 5.2.2 Header Compression To reduce RTP/UDP/IP overhead, a VoIP terminal shall use Robust Header Compression (RoHC) 4 to compress IP/UDP/RTP headers for VoIP flows. The recommended
48、configuration for RoHC is described below: The recommended profile to use is the RTP profile. The recommended mode of operation is the Optimistic O mode (Even this in case, RoHC starts in the Unidirectional U mode, as defined in RFC 3095, and then transitions to the O mode). Timer-based compression is recommended to compress the RTP timestamp. To ensure robust operation, it is recommended to set t