ANSI ATIS 1000677-2001 BICC Bearer Control Tunneling Protocol.pdf

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1、 AMERICAN NATIONAL STANDARD FOR TELECOMMUNICATIONS ATIS-1000677.2001(R2011) BICC Bearer Control Tunneling Protocol ATIS is the leading technical planning and standards development organization committed to the rapid development of global, market-driven standards for the information, entertainment an

2、d communications industry. More than 250 companies actively formulate standards in ATIS 18 Committees, covering issues including: IPTV, Service Oriented Networks, Energy Efficiency, IP-Based and Wireless Technologies, Quality of Service, and Billing and Operational Support. In addition, numerous Inc

3、ubators, Focus and Exploratory Groups address emerging industry priorities including “Green”, IP Downloadable Security, Next Generation Carrier Interconnect, IPv6 and Convergence. ATIS is the North American Organizational Partner for the 3rd Generation Partnership Project (3GPP), a member and major

4、U.S. contributor to the International Telecommunication Union (ITU) Radio and Telecommunications Sectors, and a member of the Inter-American Telecommunication Commission (CITEL). For more information, please visit . AMERICAN NATIONAL STANDARD Approval of an American National Standard requires review

5、 by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by the standards developer. Consensus is established when, in the judgment of the ANSI Board of Standards Review, substantial agreement has been reached by directly and materially affected intere

6、sts. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a concerted effort be made towards their resolution. The use of American National Standards is completely voluntary; their existe

7、nce does not in any respect preclude anyone, whether he has approved the standards or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standards. The American National Standards Institute does not develop standards and will in no circu

8、mstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Standard in the name of the American National Standards Institute. Requests for interpretations should be addressed to the secre

9、tariat or sponsor whose name appears on the title page of this standard. CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures of the American National Standards Institute require that action be taken periodically to reaffirm, revise, or withdraw thi

10、s standard. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute. Notice of Disclaimer all users of this standard are therefore encouraged to investigate the possibility of applying the most recent

11、edition of the standards and other references listed below. ITU-T Recommendation Q.1990, Bearer Independent Call Control Protocol.2T1.673-2002 - Bearer Independent Call Control (BICC) CS 1+.3T1.676-2002 - BICC IP Bearer Control Protocol (IPBCP).3_ 1A “|” indicates a change from ITU-T Recommendation

12、Q.1990. Strictly editorial changes are not shown. 2This document is available from the International Telecommunications Union. 3This document is available from the Alliance for Telecommunications Industry Solutions, 1200 G Street N.W., Suite 500, Washington, DC 20005. ATIS-1000677.2001 2 3 Terms and

13、 Definitions For the purpose of this Standard, the following definitions apply: 3.1 Tunneling PDU Generating Entity: The entity that populates and transmits the tunneled PDUs. 3.2 Tunneling PDU Receiving Entity: The entity that receives and interprets the tunneled PDUs. 4 Abbreviations This Standard

14、 uses the following abbreviations: APM Application Transport Mechanism BCP Bearer Control Protocol BCTP Bearer Control Tunneling Protocol BCU Bearer Control Unit BICC Bearer Independent Call Control BIWF Bearer Interworking Function BVEI BCTP Version Error Indicator CCU Call Control Unit CSF Call Se

15、rving Function TPEI Tunneled Protocol Error Indicator IPBCP IP Bearer Control Protocol MMSF Media Mapping/Switching Function PCI Protocol Control Information PDU Protocol Data Unit 5 Overview This Standard assumes a reliable, sequenced, point-to-point signaling transport service between peer Tunneli

16、ng PDU Generating and Receiving Entities. This Standard supports the tunneling of BCP over the following protocol. BICC protocol - BICC tunneling makes use of the BICC APM Mechanism and BICC call control, as defined in T1.673-2002.3The operation of the tunneling mechanism is illustrated in Figure 1.

17、 ATIS-1000677.2001 3 BIWFCCUCSFBCFMMSFBCUDistr.Tunneling PDUGenerating It sends this PDU back to the Tunneling PDU Generating Entity that sent it; and It informs the control logic in the BIWF (see Note). If the Tunneling PDU Receiving Entity receives a tunneled PDU with a known value of the BCTP Ver

18、sion Indicator, but an unknown value of the Tunneled Protocol Indicator: It generates a two-octet PDU back into the tunnel only containing the BCTP Indicator field. The Tunneled Protocol Error Indicator is set at the “Protocol Error Indication, bearer control protocol not supported“ value. The Tunne

19、led Protocol Indicator is set to the same value as the Tunneled Protocol Indicator value received; It sends this PDU back to the Tunneling PDU Generating Entity that sent it; and It informs the control logic in the BIWF (note). If the Tunneling PDU Receiving Entity receives a tunneled PDU with the T

20、unneled Protocol Error Indicator value “Protocol Error Indication, Bearer Control Protocol not supported,“ and/or if the Tunneling PDU Receiving Entity receives a tunneled PDU with the BCTP Version Error Indicator value “Version Error Indication, BCTP version not supported“: It informs the control l

21、ogic in the BIWF (Note). NOTE - It is the responsibility of the control logic in the BIWF to take appropriate release actions. However, the control logic in the BIWF is out of the scope of this Standard. Procedures for version negotiation and protocol negotiation are for further study. ATIS-1000677.

22、2001 6 7.3 Policing of Maximum Length Tunneled PDUs The tunneling PDU generating entity shall police the maximum length of the tunneled PDUs in order to ensure that the maximum data transfer capabilities of the tunneling mechanisms in BICC are not exceeded. These maximum transfer capabilities depend on the capabilities of the underlying signaling transport network supporting the BICC interface.

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