# US 2013/0155925 A1 · Mobile Node Group Formation And Management > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0155925 A1 - Document ID: US20130155925A1 - Status: Published application - Kind: A1 - Application number: 13/327,449 - Filed: 2011-12-15 - Published: 2013-06-20 - Earliest claimed: 2011-12-15 - Assignees: Microsoft Corporation - Inventors: Nissanka Arachchige Bodhi Priyantha; Jie Liu; Aveek Ravishekhar Purohit - Web page: https://patentgrep.com/patent/US20130155925A1 ## CPC - H04W 52/0245: {according to signal strength} - H04W 24/02: Arrangements for optimising operational condition - H04W 52/0261: {managing power supply demand, e.g. depending on battery level} - H04W 48/08: Access restriction or access information delivery, e.g. discovery data delivery (signalling during connection H04W76/00) - Y02D 30/70: in wireless communication networks - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract The subject disclosure is directed towards mobile network management by reducing energy consumption and increasing a lifetime of one or more nodes. By determining a beacon listening duration and a beacon listening period in response to an energy budget, each node may minimize or reduce latencies associated with node discovery and/or node group maintenance. The beacon listening duration and the beacon listening period is used to compute a beacon broadcasting duration and a beacon broadcasting period such that advertising beacon transmissions and advertising beacon receptions occur at substantially concurrent time slots between low power states. These advertising beacons are used to propagate and maintain group membership information amongst the one or more nodes. ## Claims ### Claim 1 In a computing environment, a method comprising, managing energy consumption of a node during discovery and group maintenance over wireless links, including, determining a beacon listening duration and a beacon listening period in response to an energy budget, determining a beacon broadcasting duration and a beacon broadcasting period based on the beacon listening period and the beacon listening duration, and between low power states, connecting to one or more other nodes within a mobile network at one or more time slots corresponding to at least one of the beacon listening duration and the beacon broadcasting duration. ### Claim 2 (depends on 1) The method of claim 1, wherein connecting to the one or more other nodes further comprises communicating a plurality of frames within an advertising beacon transmission, wherein each frame comprises a copy of the membership information. ### Claim 3 (depends on 1) The method of claim 1, wherein connecting to the one or more other nodes further comprises establishing the beacon listening duration based on a Receive Signal Strength Indicator (RSSI) response time. ### Claim 4 (depends on 1) The method of claim 1, wherein connecting to the one or more other nodes further comprises determining a beacon reception time slot for the beacon listening period based on frame offset associated with a received advertising beacon. ### Claim 5 (depends on 1) The method of claim 1, wherein connecting to the one or more other nodes further comprises modifying at least one of the beacon broadcasting period and the beacon broadcasting duration. ### Claim 6 (depends on 1) The method of claim 1, wherein connecting to the one or more other nodes further comprises determining a beacon transmission time slot based on the beacon listening period and a node identifier. ### Claim 7 (depends on 1) The method of claim 1, wherein connecting to the one or more other nodes further comprises selectively turning off one or more advertising beacon receptions. ### Claim 8 (depends on 1) The method of claim 1, wherein connecting to the one or more other nodes further comprises updating local membership information using advertising beacons from the one or more other nodes. ### Claim 9 (depends on 1) The method of claim 1, wherein connecting to the one or more other nodes further comprises aligning the beacon broadcasting period and the beacon listening period. ### Claim 10 (depends on 1) The method of claim 1, wherein connecting to the one or more other nodes further comprises partitioning a total duty cycle allocation into substantially equal shares for the beacon listening duration and the beacon broadcasting duration. ### Claim 11 In a computing environment, a system, comprising, a plurality of nodes for a mobile network configured to coordinate advertising beacon transmissions and advertising beacon receptions at time slots between low power states, wherein each node is configured to partition an energy budget for the advertising beacon transmissions and the advertising beacon receptions, to propagate membership information during the advertising beacon transmissions, and to update the membership information during the advertising beacon receptions. ### Claim 12 (depends on 11) The system of claim 11, wherein each of the plurality of nodes comprises a management mechanism configured to add a node identifier associated with a new node to the membership information. ### Claim 13 (depends on 11) The system of claim 11, wherein each of the plurality of nodes comprises a management mechanism configured to remove a node identifier associated with a departed node to the membership information. ### Claim 14 (depends on 11) The system of claim 11, wherein a first portion of the plurality of nodes is configured to transmit an advertising beacon based on a start time of a beacon listening period and a second portion of the plurality of nodes is configured to transmit an advertising beacon based on an intermediate time of the beacon listening period. ### Claim 15 (depends on 11) The system of claim 11, wherein at least a portion of the plurality of nodes is further configured to establish a schedule for at least one of advertising beacon transmissions and the advertising beacon receptions. ### Claim 16 (depends on 11) The system of claim 11, wherein at least a portion of the plurality of nodes is further configured to synchronize a beacon listening period and to alternate beacon transmission time slots. ### Claim 17 One or more computer-readable media having computer-executable instructions, which when executed perform steps, comprising: determining a beacon listening duration based on a Receive Signal Strength Indicator (RSSI) response time; computing a beacon listening period in response to on the beacon listening duration and an energy budget; computing a beacon broadcasting duration to be a portion of the beacon listening duration; computing a beacon broadcasting period using the beacon listening period and the beacon listening duration; switching out of a low power state and into a receive state at one or more time slots corresponding to the beacon listening duration within the beacon listening period; and switching out of the receive state and into a transmit state at one or more time slots corresponding to the beacon broadcasting duration within the beacon broadcasting period. ### Claim 18 (depends on 17) The one or more computer-readable media of claim 17 having further computer-executable instructions comprising: switching out of the low power state to perform an advertising beacon reception at the one or more time slots corresponding to the beacon listening duration within the beacon listening period and perform an advertising beacon transmission at the one or more time slots corresponding to the beacon broadcasting duration within the beacon broadcasting period; and switching back to the low power state after the advertising beacon transmission and the advertising beacon reception. ### Claim 19 (depends on 17) The one or more computer-readable media of claim 17 having further computer-executable instructions comprising: receiving an advertising beacon within each beacon listening period; and transmitting an advertising beacon within each beacon broadcasting period. ### Claim 20 (depends on 17) The one or more computer-readable media of claim 17 having further computer-executable instructions comprising: aligning the beacon broadcasting period and the beacon listening period; and synchronizing the beacon listening duration and the beacon broadcasting duration at a start time slot of each beacon broadcasting period.