O'Reilly logo

LTE, LTE-Advanced and WiMAX: Towards IMT-Advanced Networks by Najah Abu Ali, Hossam S. Hassanein, Abd-Elhamid M. Taha

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Mobility Management in IEEE 802.16j-2009

The IEEE 802.16j amendment describes how the MR-BSs and the RSs should behave during MS mobility between MR-BSs and RSs, and between different RS. The amendment also details the signaling required for RS mobility. In both cases, the MR-BS maintains substantial control of MS handover, even when scheduling ntRSs are involved.

MR-BS and RS Behavior during MS Handover

Depending on the type of the MS's target superordinate station, the MR-BS ensures sufficient resources are provided so that signaling between the MR-BS and the MS can be delivered. If the superordinate is an ntRS with centralized scheduling, MR-BS inserts a Fast Ranging IE in the UL-MAP to be broadcast on the access link and provides sufficient bandwidth on the relay link for forwarding the RNG-REQ. If the superordinate station is a scheduling ntRS, it is instructed by the MR-BS to send the Fast Ranging IE. For tRSs, the MR-BS inserts the Fast Ranging IE in the UL-MAP and provides sufficient bandwidth in the tRS's uplink; the tRS, in turn, would forward the RNG-REQ on the access link.

For topology advertisement, each ntRS may advertise differently from the MR-BS's own MOB_NBR-ADV. Under centralized scheduling, the MR-BS must allocate bandwidth for its advertisement; under distributed scheduling, the RSs are autonomous in their allocation.

MR-BS controls the scanning procedure. Scheduling ntRSs coordinate with MR-BS to schedule scanning, and may terminate scanning procedures if ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required