latency-critical properties over lower-latency paths while other traffic may be directed over other paths (more hops, poorer links), or to provide a means to allow higher-priority messages to be transmitted before lower-priority messages over the same link. Changes to the MAC and PHY The proposal shall not require modifications to the 802.15.4 PHY or MAC layers with the exception of additional Information Elements to facilitate the exchange of PHY and MAC information Multiple Entry and Exit points The proposal should support the use of multiple ingress and egress points for data within the network if required by the application(s). For the proposal: Devices shall implement a method to select the most appropriate entry/exit point for their communications with entities outside the network If a device becomes unable to communicate with an entity outside the network at the required quality of service using its preferred entry/exit point, it shall be possible for the device to find an alternative entry/exit point (if one exists) and begin to use that It be possible for devices to use different entry/exit points to communicate with different external entities It may be possible for the protocol to use connections external to the network between ingress and egress points as part of the route between devices within the network (backbone routing). Performance requirements Scenario for performance requirements comparison The following simplified scenario has been defined for the purposes of the Call for Preliminary Proposals (CfPP). As such, the scenario has locked down several aspects, some which may be in conflict with the requirements in the TGD. Proposers are reminded that proposals shall support all aspects of the TGD, even though the scenario to be used for comparison during the CfPP phase has tied some of those down. For the Call for Final Proposals (CfFP) a more extensive scenario(s) will be defined. CfPP Scenario Network Size & Formation PAN coordinator is at the center of the grid During CfPP use 11x11 and 33x33 node networks (99x99 will be added during CfFP)
latency-critical properties over lower-latency paths while other traffic may be directed over other paths (more hops, poorer links), or to provide a means to allow higher-priority messages to be transmitted before lower-priority messages over the same link. Changes to the MAC and PHY The proposal shall not require modifications to the 802.15.4 PHY or MAC layers with the exception of additional Information Elements to facilitate the exchange of PHY and MAC information Multiple Entry and Exit points The proposal should support the use of multiple ingress and egress points for data within the network if required by the application(s). For the proposal: Devices shall implement a method to select the most appropriate entry/exit point for their communications with entities outside the network If a device becomes unable to communicate with an entity outside the network at the required quality of service using its preferred entry/exit point, it shall be possible for the device to find an alternative entry/exit point (if one exists) and begin to use that It be possible for devices to use different entry/exit points to communicate with different external entities It may be possible for the protocol to use connections external to the network between ingress and egress points as part of the route between devices within the network (backbone routing). Performance requirements Scenario for performance requirements comparison The following simplified scenario has been defined for the purposes of the Call for Preliminary Proposals (CfPP). As such, the scenario has locked down several aspects, some which may be in conflict with the requirements in the TGD. Proposers are reminded that proposals shall support all aspects of the TGD, even though the scenario to be used for comparison during the CfPP phase has tied some of those down. For the Call for Final Proposals (CfFP) a more extensive scenario(s) will be defined. CfPP Scenario Network Size & Formation PAN coordinator is at the center of the grid During CfPP use 11x11 and 33x33 node networks (99x99 will be added during CfFP)