Large-Scale Measurement of Broadband Performance
|Document||Charter||Large-Scale Measurement of Broadband Performance WG (lmap)|
|Title||Large-Scale Measurement of Broadband Performance|
|IESG||Responsible AD||Benoît Claise|
|Charter edit AD||Benoît Claise|
|Send notices to||(None)|
The Large-Scale Measurement of Broadband Performance (LMAP) working group standardizes the LMAP measurement system for performance measurements of broadband access devices such as home and enterprise edge routers, personal computers, mobile devices, set top box, whether wired or wireless. Measuring portions of the Internet on a large scale is essential for accurate characterizations of performance over time and geography, for network diagnostic investigations by providers and their users, and for collecting information to support public policy development. The goal is to have the measurements (made using the same metrics and mechanisms) for a large number of points on the Internet, and to have the results collected and stored in the same form. The LMAP working group is chartered to specify an information model, the associated data models, and select/extend one or more protocols for the secure communication: 1. A Control Protocol, from a Controller to instruct Measurement Agents what performance metrics to measure, when to measure them, how/when to report the measurement results to a Collector, 2. A Report Protocol, for a Measurement Agent to report the results to the Collector. The data models should be extensible for new and additional measurements. LMAP will consider re-use of existing data models languages. A key assumption constraining the initial work is that the measurement system is under the control of a single organization (for example, an Internet Service Provider or a regulator). However, the components of an LMAP measurement system can be deployed in administrative domains that are not owned by the measuring organization. Thus, the system of functions deployed by a single organization constitutes a single LMAP domain which may span ownership or other administrative boundaries. The LMAP architecture will allow for measurements that utilize either IPv4 or IPv6, or possibly both. Devices containing Measurement Agents may have several interfaces using different link technologies. Multiple address families and interfaces must be considered in the Control and Report protocols. It is assumed that different organization's LMAP measurement domains can overlap, and that active measurement packets appear along with normal user traffic when crossing another organization's network. There is no requirement to specify a mechanism for coordination between the LMAP measurements in overlapping domains (for instance a home network with MAs on the home gateway, set top box and laptop). In principle, there are no restrictions on the type of device in which the MA function resides. Both active and passive measurements are in scope, although there may be differences in their applicability to specific use cases, or in the security measures needed according to the threats specific to each measurement category. LMAP will not standardize performance metrics. The LMAP WG will consider privacy as a core requirement and will ensure that by default measurement and collection mechanisms and protocols standardized operate in a privacy-sensitive manner, for example, ensuring that measurements are not personally identifying except where permission for such has been granted by identified subjects. Note that this does not mean that all uses of LMAP need to turn on all privacy features but it does mean that privacy features do need to be at least well-defined. Standardizing control of end users Measurement Agents is out of scope. However, end users can obtain an MA to run measurement tasks if desired and report their results to whomever they want, most likely the supplier of the MA. This provides for user-initiated on-demand measurement, which is an important component of the ISP use case. Inter-organization communication of results is out of scope of the LMAP charter. The management protocol to bootstrap the MAs in measurement devices is out of scope of the LMAP charter. Service parameters, such as product category, can be useful to decide which measurements to run and how to interpret the results. These parameters are already gathered and stored by existing operations systems. Discovering the service parameters on the MAs or sharing the service parameters between MAs are out of the scope. However, if the service parameters are available to the MAs, they could be reported with the measurement results in the Report Protocol. Deciding the set of measurements to run is a business decision and is out of scope of the LMAP charter. Protection against the intentional or malicious insertion of inaccuracies into the overall system or measurement process (sometimes known as "gaming the system") is outside the scope of work. The LMAP working group will coordinate with other standards bodies working in this area (e.g., BBF, IEEE 802.16, ETSI) regarding the information model, and with other IETF working groups in the areas of data models, protocols, multiple interface management, and measurement of performance metrics. The LMAP WG will produce the following work items: 1. The LMAP Framework - provides common terminology, basic architecture elements, and justifies the simplifying constraints 2. The LMAP Use Cases - provides the motivating use cases as a basis for the work 3. Information Model, the abstract definition of the information carried from the Controller to the MA and the information carried from the MA to the Collector. It includes * The metric(s) that can be measured and values for its parameters such as the Peer MA participating in the measurement and the desired environmental conditions (for example, only conduct the measurement when there is no user traffic observed) * The schedule: when the measurement should be run and how the results should be reported (when and to which Collector) * The report: the metric(s) measured and when, the actual result, and supporting metadata such as location. Result reports may be organized in batches or may be reported immediately, such as for an on-demand measurement. 4. The Control protocol and the associated data model: The definition of how instructions are delivered from a Controller to a MA; this includes a Data Model consistent with the Information Model plus a transport protocol. This may be a simple instruction - response protocol, and LMAP will specify how it operates over an existing protocol (to be selected, perhaps REST-style HTTP(s) or NETCONF). 5. The Report protocol and the associated data model: The definition of how the Report is delivered from a MA to a Collector; this includes a Data Model consistent with the Information Model plus a transport protocol (to be selected, perhaps REST-style HTTP(s) or IPFIX).