Thread Links Date Links
Thread Prev Thread Next Thread Index Date Prev Date Next Date Index

Re: [STDS-802-16] UL parameter acquisition

Title:
Hi Feder,
 
Thanks for your reply......
 
According to my understanding
 
for e.g. if I select a MAC frame  duration of 10ms, the BS station will send DL-MAP & UL MAP in every  DL subframe (provided the if the MAP messages changes)if I went wrong plz note me...
 
UL_MAP:
But,when the BS is initialized and if there are no SS to receive the MAP messages, in DL subframe period(i.e for every 10 ms completes) the BS has to transmit UL map b'coz the BS has to provide initial ranging period in UL MAP message so that If any SS receives the MAP messages will contend & send the RNG-REQ frame & also the BS will not know when new SS will enter the NW.
DL-MAP:
And let's assume the DL MAP messages are never changed so the BS will never send the DL-MAP and if any new SS station wants to enter the NW then it cant be synchronized with the DL channel unless it receives DLMAP msg???
 
Sorry for a long mail....If I went wrong plz correct me
 
Vasanth
----- Original Message -----
Sent: Wednesday, September 13, 2006 1:10 AM
Subject: Re: [STDS-802-16] UL parameter acquisition

Actually DL-MAP, UL-MAP shall be sent whenever the maps are changed.(See 8.3.5.1)

On 9/12/2006 1:43 PM, Peretz Feder wrote:


On 9/12/2006 2:50 AM, Vasanth.Rajan wrote:

Hi all,

I have some doubt in Scanning & UL parameter acquisition

When the BS is initialized it will send first DL-MAP frame; my question is following the DL-MAP should the BS send UL-MAP frame before transmitting DCD & UCD frames????

DL/UL-MAP goes in every frame to inform and schedule SS(s).
DCD & UCD are sent every (configurable) amount of frames.

In STD 802.16-2004,6.3.9.4 Table 114,Message flow during scanning & UL parameter acquisition process,

Its given that once the SS achives DL syncronization & obtains the UL channel information and then the BS transmits UL-MAP message...How come the BS know that a particular SS has Syncronized with DL & obtained UL channel parameters????so that it could transmit UL-MAP frame.

REG-REQ MAC message

Thanks & reg

Vasanth