# US 7,613,206 B2 · Determination of characteristics during the transition between an AAL2 signalling and another signalling > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,613,206 B2 - Document ID: US7613206B2 - Status: Granted - Kind: B2 - Application number: 10/548,107 - Filed: 2004-02-02 - Published: 2006-09-28 - Granted: 2009-11-03 - Earliest claimed: 2003-03-03 - Assignees: Nokia Siemens Networks Oy - Inventors: Herbert Heiss; Bernhard Pfeil - Web page: https://patentgrep.com/patent/US7613206B2 ## CPC - H04L 12/5601: {Transfer mode dependent, e.g. ATM} - H04L 47/2491: Mapping quality of service [QoS] requirements between different networks - H04L 2012/563: {Signalling, e.g. protocols, reference model} - H04L 2012/5656: {using the AAL2} - H04L 2012/5667: {IP over ATM} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract The invention relates to a method and device for simple and efficient determining characteristics during a transition between an AAL2 signalling protocol and at least one another signalling protocol of at least one communication network. The inventive method and device are characterised in that at least one characteristic is determined on the basis of parametric values assigned to the AA2 signalling protocol and in that the determined characteristics are used for reproducing the parametric values of the AA2 signalling protocol in the parametric values of another signalling protocol. ## Claims ### Claim 1 A method for transitioning an AAL2 signaling protocol into at least one further signaling protocol of at least one communication network, comprising: in processing unit, determining at least one characteristic from the parameter values specified for the AAL2 signaling protocol; and in the processing unit, using the determined characteristics for mapping parameter values of the AAL2 signaling protocol into parameter values of the further signaling protocol, wherein a transition is performed to convert the Link Characteristics parameter values of the AAL2 signaling protocol to the Transfer Capabilities parameter values of the AAL2 signaling protocol; wherein a transition is performed to convert the Link Characteristics parameter values of the AAL2 signaling protocol to the IP Transfer Capability parameter values of a signaling protocol for IP connections; and wherein in order to determine the bit rate for the transition of the Link Characteristics parameter values of the AAL2 signaling protocol to the IP Transfer Capability parameter values of a signaling protocol for IP connections, a minimum header bit rate on the IP side is determined from a number of data packets per time unit of the peak rate at maximum packet size and the bit rate is determined in conjunction with the peak byte rate. ### Claim 2 (depends on 1) The method as claimed in claim 1, wherein a transition is performed to convert the Preferred Link Characteristics parameter values of the AAL2 signaling protocol to the Preferred Transfer Capabilities parameter values of the AAL2 signaling protocol. ### Claim 3 (depends on 1) The method as claimed in claim 1, wherein a transition is performed to convert the Preferred Link Characteristics parameter values of the AAL2 signaling protocol to the Preferred IP Transfer Capability parameter values of a signaling protocol for IP connections. ### Claim 4 (depends on 1) The method as claimed in claim 1 wherein the transition of parameter values of the AAL2 signaling protocol to a further signaling protocol is performed on the basis of an Establish Request or Modify Request. ### Claim 5 (depends on 1) The method as claimed in claim 1 wherein the bit rates, the maximum permitted packet size, the maximum CPS-SDU size, the average CPS-SDU size, the SSISU parameter or the IP Transfer Capability class are determined as characteristics of parameter values. ### Claim 6 (depends on 1) The method as claimed in claim 1, wherein in order to determine the bit rate for the transition of the Link Characteristics parameter values of the AAL2 signaling protocol to the Transfer Capabilities parameter values of the AAL2 signaling protocol, the number of peak rate data packets per time unit relative to the average CPS-SDU size is established and the bit rate determined in conjunction with the length of a packet header. ### Claim 7 (depends on 1) The method as claimed in claim 1, wherein the maximum permitted packet size is determined from the maximum CPS-SDU size, the maximum length of the SSSAR-SDU and the length of the IP packet header. ### Claim 8 (depends on 1) The method as claimed in claim 1, wherein during the determination of the characteristics a normalization to an integral multiple of 64 bits per second is performed. ### Claim 9 (depends on 1) The method as claimed in claim 1, wherein at least one of the maximum CPS-SDU size and average CPS-SDU size are/is determined from the minimum of the maximum permitted packet size minus the length of the header of the IP packet of the IP Transfer Capability or Preferred IP Transfer Capability and the maximum permissible CPS-SDU size. ### Claim 10 (depends on 1) The method as claimed in claim 1, wherein the SSISU parameter is determined from the maximum of the maximum permitted packet size minus the length of the header of the IP packet of the IP Transfer Capability, the maximum permitted packet size minus the length of the header of the IP packet of the Preferred IP Transfer Capability and the maximum permissible CPS-SDU size. ### Claim 11 (depends on 10) The method as claimed in claim 10, wherein the Desired Bandwidth Transfer Capability is chosen on the basis of previously defined conditions in relation to at least one of the link characteristics and MS link characteristics of an Establish Request from an AAL2 network and that if at least one of said conditions is not met, the Statistical Bandwidth Transfer Capability will be used as the IP Transfer Capability class. ### Claim 12 (depends on 11) The method as claimed in claim 11, wherein the IP Transfer Capability class is determined upon reception of an Establish Request from an interworking unit. ### Claim 13 (depends on 1) The method as claimed claim 1, wherein the IP packet header, the UDP header and, for connections that use RTP, the RTP header are used for determining the length of the IP packet header. ### Claim 14 (depends on 1) The method as claimed in claim 1, herein the characteristics for the transition of the AAL2 signaling protocol to a signaling protocol for IP connections are determined in an interworking unit. ### Claim 15 (depends on 1) The method as claimed in claim 1, wherein the characteristics for the transition of the AAL2 signaling protocol to a further AAL2 signaling protocol are determined in an AAL2 switching device. ### Claim 16 A device for transitioning an AAL2 signaling protocol into at least one further signaling protocol of at least one communication network, comprising: a receive unit for receiving parameter values of an AAL2 signaling protocol; a processing unit for determining at least one characteristic from parameter values specified for the AAL2 signaling protocol and for mapping parameter values of the AAL2 signaling protocol into Transfer Capability parameter values of the further signaling protocol; and a transmit unit for transmitting the mapped parameter values of the further signaling protocol, wherein a transition is performed to convert the Link Characteristics parameter values of the AAL2 signaling protocol to the Transfer Capabilities parameter values of the AAL2 signaling protocol; wherein a transition is performed to convert the Link Characteristics parameter values of the AAL2 signaling protocol to the IP Transfer Capability parameter values of a signaling protocol for IP connections; and wherein in order to determine the bit rate for the transition of the Link Characteristics parameter values of the AAL2 signaling protocol to the IP Transfer Capability parameter values of a signaling protocol for IP connections, a minimum header bit rate on the IP side is determined from a number of data packets per time unit of a peak rate at maximum packet size and the bit rate is determined in conjunction with the peak byte rate. ### Claim 17 (depends on 16) The device as claimed in claim 16, wherein an AAL2 switching unit is provided as the device. ### Claim 18 (depends on 16) The device as claimed in claim 16, wherein an interworking unit is provided as the device.