| Thread Links | Date Links | ||||
|---|---|---|---|---|---|
| Thread Prev | Thread Next | Thread Index | Date Prev | Date Next | Date Index |
|
Dear HO ad hoc group: First of all, sorry
about the late submission of the scenarios and proposal of Inter-FA and Inter
PHY mode HO. I just uploaded a contribution on it and its file
name is Inter-FA-HO-Inter-PHY-HO.doc. Here are the Introduction and Scenario parts
of the contribution. So check them out. And I hope this contribution may help enhance
and synchronize the understandings on those HO. Additionally, I proposed some
text changes for them in the contribution, too. So, check the contribution out. Thank you and see you tomorrow CC. Regards, I.
Introduction Although the current
standard drafts (16d/D5 and 16e/D3) define various types of PHY layers:
different PHY modes (SCa, OFDM, and OFDMA) and different
operating modes (sampling frequencies, channel bandwidth, FFT sizes, etc.), the
seamless HO between these different modes is not allowed due to the lack of the
MAC layer support. In this contribution, the examples of inter-FA and inter-PHY
HO’s are given to promote the common
understandings of the HO ad hoc groups, and the appropriate text changes are
proposed to support these kinds of HO. II.
Scenarios of Inter-FA and Inter-PHY Handovers A. Inter-FA-Intra-BS Handovers The typical scenario of inter-FA-intra-BS handovers occurs
within a macro cell or a cell carrying heavy traffic. Such a BS should serve a
large number of MSS and carry their heavy traffic. As per the 16e/D3 draft, a
BS may cover only one FA. In addition, although such a BS having multiple FA,
there is no way to indicate to which FA the MSS should perform a HO. More
specifically, in case of a network deployment with frequency reuse of one, an
MSS usually makes a HO to a BS without changing an FA. Hence, although the
loading at each FA at the time of the initial entry is well balanced, some ‘hot’ FA of a BS may come into being. If the BS
had multiple FA, it would be highly desired for a BS to balance loadings among
multiple FA’s. B. Inter-PHY Handovers Obviously, the most typical scenario would be for an MSS to
roam to another service provider or the network is built in multiple phases
while mixing the PHY layer. Another typical scenario would be Micro/Macro Cell
operation, which is often utilized to balance the network loading. For example,
since a macro cell may require a huge throughput, a network designer may want
to deploy a BS with a high BW and FFT size requirement (e.g. 20 MHz and 2k FFT
size). But, micro cells which are overlayed under a
macro cell would serve only stationary or pedestrian speed MSS. In addition,
since they would be densely deployed over an area, their complexity should be
low and require small BW and FFT size (e.g. 5 MHz and 512 FFT size). --------------------------------------------------------- Senior Engineer NTP SystemLab. 1 Telecommunication
Systems Division Telecommunication
Network Samsung Electronics Co., Ltd. Office: +82-31-279-3356 Mobile:
+82-10-9530-3356 Email: jungwon74.kim@samsung.com --------------------------------------------------------- |