# US 2014/0155068 A1 · Adaptive re-establishment of data sessions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0155068 A1 - Document ID: US20140155068A1 - Status: Published application - Kind: A1 - Application number: 14/092,959 - Filed: 2013-11-28 - Published: 2014-06-05 - Earliest claimed: 2012-11-30 - Assignees: Marvell International Ltd. - Applicants: Marvell International Ltd. - Inventors: Tal Porat - Web page: https://patentgrep.com/patent/US20140155068A1 ## CPC - H04W 36/0079: {in case of hand-off failure or rejection} - H04W 76/19: Connection re-establishment - H04W 36/008375: {based on historical data} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A method includes, in a mobile communication terminal, holding a definition of multiple re-establishment modes, each re-establishment mode defining a respective criterion for selecting a base station with which to re-establish a failed data session. Success statistics of one or more of the re-establishment modes in a given geographical region are collected in the terminal. In response to a failure in a data session occurring while the terminal is in the given geographical region, a re-establishment mode is selected from among the multiple re-establishment modes based on the success statistics, and the data session is re-established using the selected re-establishment mode. ## Claims ### Claim 1 A method, comprising: in a mobile communication terminal, holding a definition of multiple re-establishment modes, each re-establishment mode defining a respective criterion for selecting a base station with which to re-establish a failed data session; collecting in the terminal success statistics of one or more of the re-establishment modes in a given geographical region; and in response to a failure in a data session occurring while the terminal is in the given geographical region, selecting a re-establishment mode from among the multiple re-establishment modes based on the success statistics, and re-establishing the data session using the selected re-establishment mode. ### Claim 2 (depends on 1) The method according to claim 1, wherein collecting the success statistics comprises recording success rates of the respective re-establishment modes. ### Claim 3 (depends on 1) The method according to claim 1, comprising initially operating the terminal in a learning phase in which the terminal collects the success statistics but does not select the re-establishment mode based on the success statistics, and subsequently switching to operate the terminal in an adaptive phase in which the terminal selects the re-establishment mode based on the success statistics. ### Claim 4 (depends on 3) The method according to claim 3, comprising continuing to update the success statistics while operating in the adaptive phase. ### Claim 5 (depends on 1) The method according to claim 1, wherein holding the definition comprises defining a given re-establishment mode that re-establishes the failed data session with a same base station with which the failed data session has failed. ### Claim 6 (depends on 1) The method according to claim 1, wherein holding the definition comprises defining a given re-establishment mode that re-establishes the failed data session with a neighbor base station on a same radio frequency on which the failed data session has failed. ### Claim 7 (depends on 1) The method according to claim 1, wherein holding the definition comprises defining a given re-establishment mode that re-establishes the failed data session with a neighbor base station on a radio frequency that differs from the frequency on which the failed data session has failed. ### Claim 8 (depends on 1) The method according to claim 1, wherein holding the definition comprises defining a given re-establishment mode that re-establishes the failed data session with a strongest neighbor base station. ### Claim 9 Apparatus, comprising: a transceiver, which is configured to communicate with base stations so as to hold data sessions; and processing circuitry, which is configured to hold a definition of multiple re-establishment modes, each re-establishment mode defining a respective criterion for selecting a base station with which to re-establish failed data sessions, to collect success statistics of one or more of the re-establishment modes in a given geographical region, and, in response to a failure in a data session occurring while in the given geographical region, to select a re-establishment mode from among the multiple re-establishment modes based on the success statistics and to re-establish the data session using the selected re-establishment mode. ### Claim 10 (depends on 9) The apparatus according to claim 9, wherein the processing circuitry is configured to collect the success statistics by recording success rates of the respective re-establishment modes. ### Claim 11 (depends on 9) The apparatus according to claim 9, wherein the processing circuitry is configured to initially operate in a learning phase in which the processing circuitry collects the success statistics but does not select the re-establishment mode based on the success statistics, and subsequently to switch to operate in an adaptive phase in which the processing circuitry selects the re-establishment mode based on the success statistics. ### Claim 12 (depends on 11) The apparatus according to claim 11, wherein the processing circuitry is configured to continue to update the success statistics while operating in the adaptive phase. ### Claim 13 (depends on 9) The apparatus according to claim 9, wherein the processing circuitry is configured to hold the definition by defining a given re-establishment mode that re-establishes the failed data session with a same base station with which the failed data session has failed. ### Claim 14 (depends on 9) The apparatus according to claim 9, wherein the processing circuitry is configured to hold the definition by defining a given re-establishment mode that re-establishes the failed data session with a neighbor base station on a same radio frequency on which the failed data session has failed. ### Claim 15 (depends on 9) The apparatus according to claim 9, wherein the processing circuitry is configured to hold the definition by defining a given re-establishment mode that re-establishes the failed data session with a neighbor base station on a radio frequency that differs from the frequency on which the failed data session has failed. ### Claim 16 (depends on 9) The method according to claim 9, wherein the processing circuitry is configured to hold the definition by defining a given re-establishment mode that re-establishes the failed data session with a strongest neighbor base station. ### Claim 17 (depends on 9) A mobile communication terminal comprising the apparatus of claim 9. ### Claim 18 (depends on 9) A chipset for processing signals in a mobile communication terminal, comprising the apparatus of claim 9.