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27.3.2017 : 12:32

Workpackage 5 - Mobility and QoS

The leader of WP5 is Stéphanie Léveil of TCF.

QoS provisioning with scattered spectrum portions and their variable availability in time, together with mobility, opens a number of research issues to be addressed.

The spectrum opportunities identified by blocks studied in WP6 are here managed to achieve the desired per-user QoS at the radio access level (layer 1 and layer 2) in relation with the Network layer (layer 3), and considering end-to-end issues. The solution studied in this workpackage will rely on the cross-layer concept, thus allowing deriving optimized (and/or sub-optimal) solutions taking into account the different layers globally and their interaction. This assumes that the radio architecture provides enough flexibility and interfaces between layers to enable cross-layer schemes. In particular, QoS will be provisioned for example using the Type of Service (TOS) field from IP layer onto differentiated processing of the different data flows. WP5 will also address the handoff (HO) mechanisms that will play a key role in the QoS fulfilment. Different solutions to guarantee QoS objectives at layer 1 and 2 (hard handover, seamless handover, lossless handover etc.) will be studied. Studied is WP5 are done in relationship with WP6.



The general objective of WP5 is to study and develop in target reference scenarios solutions for supporting quality of service (QoS) with opportunistic spectrum access in presence of mobility. In more detail, the objectives of WP5 are:


• To develop the mechanisms to support mobility and manage QoS at the radio access level when making opportunistic use of spectrum. This includes identification of QoS class at the MAC from Network layer and corresponding differentiated processing of the data flows.

• Develop policies (classes, scheduling, etc.) for QoS support in QoSMOS opportunistic environment, i.e., with mobility and scattered available spectrum. 

• Study methods for robust and reliable end-to-end communication with intermittently available resources.

• Study methods for reliable transmission with limited and/or erroneous and/or randomly-available feedback (acknowledgement).