why 2 steal bits are used in TCH burst ? This topic has 10 replies, 1 voice, and was last updated 16 years, 1 month ago by giri. Viewing 11 posts - 1 through 11 (of 11 total) Author Posts 2nd August 2007 at 09:05 #48505 giriGuest in TCH burst packet: 3 tail Bits 57 data bits 1 steal bit 26 training squence bits 1 steal bit 57 data bits 3 tail Bits 8.25 gaurd band wht do we need 2 steal bits here, we ca do it with one steal bit only to identify a data or a control signal(FACCH) 2nd August 2007 at 10:00 #48506 NarChaiGuest 2 stealing bits in TCH use for FACCH (Fast Associated Control Channel)is used when a handover is requied good lock 2nd August 2007 at 10:21 #48507 giriGuest than u can use only one bit for FACCH and TCH identifying why u need two bits 2nd August 2007 at 10:25 #48508 giriGuest u can identify TCH or FACCH from 1 bit only why 2 bits are used?? 2nd August 2007 at 13:16 #48509 pixGuest i’ve no idea… 3rd August 2007 at 09:34 #48510 naveenGuest Probably the second stealing bit might be used for future use! 🙂 3rd August 2007 at 14:28 #48511 giriGuest for Pix in spec 05.03 it is mention that two stealing bits r for two halfs of the message part in the spec it is mentioned that voice data and FACCH goes at the same burst. 3rd August 2007 at 15:38 #48512 pixGuest so maybe it has something to do with half rate ? 1 FACCH bit per channel… that was my first assumption, but since HR are sent once every 2 TS (and not each time on half of the timeslot), it didn’t seem very logical… but i don’t know, really. 4th August 2007 at 05:40 #48513 giriGuest pix– it nothing to do with half rate FACCH is used when mobile is trying for handover so u may not know when it can try for handover one possiblity is send FACCH in the whole burst and TCH in the next burst but in the spec it is not the case(reason i dont know) 6th August 2007 at 04:07 #48514 BhanuGuest 2 steal bits r used to indiacte if the upper or lower segment have been stolen. 6th August 2007 at 06:21 #48515 giriGuest thks bhanu Author Posts Viewing 11 posts - 1 through 11 (of 11 total) The forum ‘Telecom Design’ is closed to new topics and replies.