# US 2015/0146554 A1 · Method and apparatus for measuring end-to-end accessibility in voice over long term evolution networks > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2015/0146554 A1 - Document ID: US20150146554A1 - Status: Published application - Kind: A1 - Application number: 14/092,844 - Filed: 2013-11-27 - Published: 2015-05-28 - Earliest claimed: 2013-11-27 - Assignees: AT&T Intellectual Property I, L.P. - Applicants: AT&T Intellectual Property I, L.P. - Inventors: SOSHANT BALI; Guangtian Liu - Web page: https://patentgrep.com/patent/US20150146554A1 ## CPC - H04L 41/5016: {based on statistics of service availability, e.g. in percentage or over a given time} - H04L 41/5009: Determining service level performance parameters or violations of service level contracts, e.g. violations of agreed response time or mean time between failures [MTBF] - H04L 43/0811: by checking connectivity - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract In one embodiment, a method for estimating end-to-end accessibility in a voice over long term evolution network includes aggregating data, by a processor, from a plurality of sources in the network relating to calls originating from and terminating in the network, where the data indicates success rates for a plurality of procedures initiated by placement of the calls, and calculating, by the processor, a metric indicative of the end-to-end accessibility from the data. ## Claims ### Claim 1 A method for estimating end-to-end accessibility in a voice over long term evolution network, the method comprising: aggregating data, by a processor, from a plurality of sources in the network relating to calls originating from and terminating in the network, where the data indicates success rates for a plurality of procedures initiated by placement of the calls; and calculating, by the processor, a metric indicative of the end-to-end accessibility from the data. ### Claim 2 (depends on 1) The method of claim 1, wherein the calculating comprises: computing a percentage of successful mobile originated call setup attempts during a period of time. ### Claim 3 (depends on 2) The method of claim 2, wherein the computing comprises: determining a first quantity representing a percentage of successful mobile originated session initiation protocol bearer activation attempts; determining a second quantity representing a percentage of successful mobile originated voice over internet protocol call setup attempts given that the session initiation protocol bearer has been activated successfully; multiplying the first quantity by the second quantity to obtain a third quantity; and dividing the third quantity by one hundred. ### Claim 4 (depends on 3) The method of claim 3, wherein determining the second quantity comprises: dividing a number of successful mobile originated voice over Internet protocol call setup attempts of a given type by a number of mobile originated voice over internet protocol call setup attempts of the given type. ### Claim 5 (depends on 4) The method of claim 4, wherein the given type is voice over long term evolution to voice over long term evolution. ### Claim 6 (depends on 4) The method of claim 4, wherein the given type is voice over long term evolution to non-voice over long term evolution. ### Claim 7 (depends on 1) The method of claim 1, wherein the calculating comprises: computing a percentage of successful call setup attempts made to voice over long term evolution user endpoint devices that are within coverage of a voice over long term evolution-enabled radio access network. ### Claim 8 (depends on 7) The method of claim 7, wherein the computing comprises: determining a first quantity representing a number of successful mobile terminated voice over internet protocol call setup attempts of a specified type, given that a terminating user endpoint device is within coverage of the voice over long term evolution-enabled radio access network; determining a second quantity representing a number of mobile terminated voice over internet protocol call setup attempts of the specified type; dividing the first quantity by the second quantity to obtain a third quantity; and multiplying the third quantity by one hundred. ### Claim 9 (depends on 8) The method of claim 8, wherein the specified type is voice over long term evolution to voice over long term evolution within coverage of the voice over long term evolution-enabled radio access network. ### Claim 10 (depends on 8) The method of claim 8, wherein the specified type is 3G to voice over long term evolution within coverage of the voice over long term evolution-enabled radio access network. ### Claim 11 (depends on 1) The method of claim 1, wherein the calculating comprises: computing a percentage of successful call setup attempts made to voice over long term evolution user endpoint devices that are outside of coverage of a voice over long term evolution-enabled radio access network. ### Claim 12 (depends on 11) The method of claim 11, wherein the computing comprises: determining a first quantity representing a number of successful mobile terminated circuit switched call setup attempts of a specified type, given that a terminating user endpoint device is outside of coverage of the voice over long term evolution-enabled radio access network; determining a second quantity representing a number of mobile terminated circuit switched call setup attempts of the specified type; dividing the first quantity by the second quantity to obtain a third quantity; and multiplying the third quantity by one hundred. ### Claim 13 (depends on 12) The method of claim 12, wherein the specified type is voice over long term evolution to voice over long term evolution outside of coverage of the voice over long term evolution-enabled radio access network. ### Claim 14 (depends on 12) The method of claim 12, wherein the specified type is 3G to voice over long term evolution outside of coverage of the voice over long term evolution-enabled radio access network. ### Claim 15 A computer-readable storage device storing a plurality of instructions which, when executed by a processor of a server, cause the processor to perform operations for estimating end-to-end accessibility in a voice over long term evolution network, the operations comprising: aggregating data from a plurality of sources in the network relating to calls originating from and terminating in the network, where the data indicates success rates for a plurality of procedures initiated by placement of the calls; and calculating a metric indicative of the end-to-end accessibility from the data. ### Claim 16 (depends on 15) The computer-readable storage device of claim 15, wherein the calculating comprises: computing a percentage of successful mobile originated call setup attempts during a period of time. ### Claim 17 (depends on 16) The computer-readable storage device of claim 16, wherein the computing comprises: determining a first quantity representing a percentage of successful mobile originated session initiation protocol bearer activation attempts; determining a second quantity representing a percentage of successful mobile originated voice over internet protocol call setup attempts given that the session initiation protocol bearer has been activated successfully; multiplying the first quantity by the second quantity to obtain a third quantity; and dividing the third quantity by one hundred. ### Claim 18 (depends on 15) The computer-readable storage device of claim 15, wherein the calculating comprises: computing a percentage of successful call setup attempts made to voice over long term evolution user endpoint devices that are within coverage of a voice over long term evolution-enabled radio access network. ### Claim 19 (depends on 15) The computer-readable storage device of claim 15, wherein the calculating comprises: computing a percentage of successful call setup attempts made to voice over long term evolution user endpoint devices that are outside of coverage of a voice over long term evolution-enabled radio access network. ### Claim 20 An apparatus for estimating end-to-end accessibility in a voice over long term evolution network, comprising: a processor; and a computer-readable storage device storing a plurality of instructions which, when executed by the processor, cause the processor to perform operations, the operations comprising: aggregating data from a plurality of sources in the network relating to calls originating from and terminating in the network, where the data indicates success rates for a plurality of procedures initiated by placement of the calls; and calculating a metric indicative of the end-to-end accessibility from the data.