Context Transfer Indication for Seamless Roaming in IEEE 802.11-24/383r0
Explore the concept of near-static context transfer in seamless roaming for IEEE 802.11 networks. Understand the importance of transferring context between access points efficiently to enhance device connectivity and operational readiness. Discover key aspects and information items critical for successful context transfer signaling, enabling a smooth transition between access points during device roaming.
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December 2024 doc.: IEEE 802.11-24/383r0 Transferred Context Indication for Seamless Roaming Date: 2024-12-01 Authors: Name Peshal Nayak Affiliations Samsung Address Phone email p.nayak@samsung.com Bilal Sadiq Vishnu Ratnam Rubayet Shafin Yue Qi Boon Loong Ng Submission Slide 1 Peshal Nayak, Samsung Research America
December 2024 doc.: IEEE 802.11-24/383r0 Abstract Near-static context transfer is one of the key aspects of seamless roaming procedure: Enables a non-AP MLD to prepare the target AP MLD with necessary setups prior to roam In this contribution we discuss some information items which can benefit the device side if included in context transfer signaling: Context transfer indication: Indication of which near static contexts have been successfully transferred and which ones failed. Submission Slide 2 Peshal Nayak, Samsung Research America
December 2024 doc.: IEEE 802.11-24/383r0 Context Transfer Background A device may have set up more than one feature with the current AP. Setting up each of the features one by one with the target AP can take multiple frame exchanges which is not desired. As the device roams to a target AP, it is important that the features setup by STA with the current AP are also setup on the target AP. Example features that can benefit from context transfer Context Type Seq Number (SN) Dynamic Packet Number (PN) Dynamic BA context Dynamic BA setup Near Static SCS/MSCS Near Static EPCS Near Static TWT and variants (bTWT, rTWT, etc.) Near Static P2P TWT/CoEx session Near Static Two types of context: Near static: setups which do not change on a short time scale. Limit to a few features Dynamic: which can keep changing on a short time scale. Submission Slide 3 Peshal Nayak, Samsung Research America
August 2024 doc.: IEEE 802.11-24/383r0 Near Static Context Transfer Near static context transfer procedure can enable a non-AP MLD to prepare a target AP MLD with necessary setups for its operation upon roam. In this contribution, we discuss some information items whose inclusion in the context transfer signaling is critical or beneficial for the non-AP MLD. Submission Slide 4 Peshal Nayak, Samsung Research America
December 2024 doc.: IEEE 802.11-24/383r0 Transferred/Failed Context Indication The context transfer response frame must contain an indication of either: Transferred context: contexts which were successfully transferred from the current AP MLD to the target AP MLD Failed context: alternatively an indication of which contexts were not transferred from the current AP MLD to the target AP MLD can be provided. This information enables a non-AP MLD to determine which features need to be re-setup upon roam Target AP MLD Current AP MLD Non-AP MLD Context transfer req Near static context transfer Context transfer resp< , transferred/failed context indication, > Submission Slide 5 Peshal Nayak, Samsung Research America
December 2024 doc.: IEEE 802.11-24/383r0 Conclusion In this contribution, we discussed signaling details for near static context transfer. Transferred/failed context indication Submission Slide 6 Peshal Nayak, Samsung Research America
