From jmandin@STREETWAVES-NETWORKS.COM Fri Apr 23 10:41:43 2004 Date: Thu, 22 Apr 2004 15:33:00 -0600 From: Jeff Mandin To: l.napoli@ieee.org Subject: Re: [STDS-802-16] Broadcast Ken Stanwood wrote: >We should consider whether a true broadcast well-known connection would be >useful. If so, I recommend putting it in 16e since it's an extra feature. > >Ken > I think that's a good idea (perhaps a necessary one). Another reason to put it into .16e is that an SS that HOs to a new BS will need access to the data broadcast connection.. The SFId for the broadcast service should be "well-known" too. This all assumes an 802.3 CS. - Jeff > _____ > >From: owner-stds-802-16@listserv.ieee.org >[mailto:owner-stds-802-16@listserv.ieee.org] On Behalf Of Pedro Neves >Sent: Wednesday, April 21, 2004 4:42 AM >To: STDS-802-16@listserv.ieee.org >Subject: Re: [STDS-802-16] Broadcast > > > >The draft does not specify one broadcast and one multicast connection for >sending data from the BS to the SS's? > > > >As Vladimir said, multicast polling groups are used, but what about data >transfer from the BS to the SS's? I thought CIDs were allocated for this >type of transmissions. > > > > > >Regards, > >Pedro Neves > > > >-------------------------------------------------------------------- > >Pedro Miguel Naia Neves > >Instituto Telecomunicações - http://www.av.it.pt > >Aveiro - Portugal > >Phone: +351 234 377 900 > >Mobile: +351 96 618 75 82 > >Homepage: >http://daidalos.av.it.pt/~pneves > >MSN contact: etneves@hotmail.com > > > > _____ > >From: owner-stds-802-16@listserv.ieee.org >[mailto:owner-stds-802-16@listserv.ieee.org] On Behalf Of Vladimir Yanover >Sent: quarta-feira, 21 de Abril de 2004 12:06 >To: STDS-802-16@listserv.ieee.org >Subject: Re: [STDS-802-16] Broadcast > > > >Eyal, > >Seems that the standard does not preclude from sending data over broadcast >connection. Another question is whether > >we may establish a service flow associated with broadcast connection. I >think, we cannot, then there is no way > >for data entering CS SAP to be routed to broadcast connection. > >By the way, multicast connections are not related to multicast [polling] >groups. > >Vladimir > >-----Original Message----- >From: Eyal Verbin [mailto:everbin@AIRSPAN.COM] >Sent: Wednesday, April 21, 2004 1:39 PM >To: STDS-802-16@LISTSERV.IEEE.ORG >Subject: [STDS-802-16] Broadcast > >Section 6.1 of the standard states that " In addition to individually >addressed messages, messages may also be sent on multicast connections >(control messages and video distribution are examples of multicast >applications) as well as broadcast to all stations." > > > >Correct me if I'm wrong, but broadcast transmission is limited to MAC >management messages (MAPs, DCD,...) and can't be used to transfer data. >Therefore, the only way to broadcast data is to form a multicast group >containing all SS's > > >Eyal > > > >-----Original Message----- >From: owner-stds-802-16@listserv.ieee.org >[mailto:owner-stds-802-16@listserv.ieee.org]On Behalf Of Don Leimer >Sent: Monday, April 19, 2004 8:26 PM >To: STDS-802-16@listserv.ieee.org >Subject: Re: [STDS-802-16] Clarification regarding SS power level control > >Only one more comment. The final 4dB of error will also be reduced by >subsequent BS commands, and relative error diminishes to +/- 0.5dB for the >final error (relative to the BS's capability to measure power) > >-----Original Message----- >From: Raja Banerjea [mailto:RBanerjea@PROXIM.COM] >Sent: Monday, April 19, 2004 9:14 AM >To: STDS-802-16@LISTSERV.IEEE.ORG >Subject: Re: [STDS-802-16] Clarification regarding SS power level control > >The power control method is a closed loop method where the Base station asks >for further power control corrections if required. If the base station >requests the subscriber station in the RNG-RESP to increase the power level >by 30dB the SS should increase it by 30dB with a relative accuracy of 4dB. > >If the Base station is going to increase the power of the SS in 5 steps and >the BS requests the SS to increase the power by 8dB the SS will increase it >by 8dB with a relative accuracy of 4dB. In the subsequent RNG-RESP message >the BS instead of requesting a power increase of 8dB will request for >8dB+(relative accuracy). Therefore after each increase requested from the BS >the relative accuracy should be 4dB. > >This assumes that the BS can make an accurate measurement of the SS's power >increase. > >Any comments ? > >Regards, > >-Raja > > > >-----Original Message----- >From: Crozier, Eugene [mailto:Eugene_Crozier@SRTELECOM.COM] >Sent: Monday, April 19, 2004 6:26 AM >To: STDS-802-16@listserv.ieee.org >Subject: Re: [STDS-802-16] Clarification regarding SS power level control > >My understanding of this is that the step size should be greater than 1 dB >but less than 8 dB (I'd assumed for the relative accuracy that the 50% of >the step size can be no more than 4 dB), but the number of steps is based on >the step size and the relative accuracy to achieve the minimum control >range, so for 1 dB steps, the number of steps can be between 60 and 20 >(30/0.5 and 30/1.5) for a 30 dB range, and for 8 dB step size the number of >steps between 8 and 3 for the 30 dB range. > > > >Regards > > > >Eugene Crozier > >-----Original Message----- >From: Eyal Verbin [mailto:everbin@AIRSPAN.COM] >Sent: Monday, April 19, 2004 8:22 AM >To: STDS-802-16@listserv.ieee.org >Subject: [STDS-802-16] Clarification regarding SS power level control > >Power level control for the OFDM PHY is defined in section 8.3.9.1: > >" For an SS not supporting subchannelization, the transmitter shall support >a monotonic power level control of 30 dB minimum. For an SS supporting >subchannelization, the transmitter shall support a monotonic power level >control of 50 dB minimum. The minimum step size shall be no more than 1 dB. >The relative accuracy of the power control mechanism is +/-50% of the step >size in dB, but no more than 4 dB. As an example, for a step size of 5 dB >the relative accuracy is 2.5 dB. For a BS, the transmitter shall support a >monotonic power level control of 10 dB minimum." > >Looking at the SS (subchannelization) for example, it is possible to go from >Min power to Max power either in 5 steps of 8 dB or in a single step of >50dB. In the first option the accumulated offset can reach 5*4dB (20dB) >wheras in the second option the tolerance is limited to 4dB. > >Does anyone have a more clear interpretation of this text? > >Eyal Verbin > > > >This mail passed through mail.alvarion.com > >**************************************************************************** >******** >This footnote confirms that this email message has been scanned by >PineApp Mail-SeCure for the presence of malicious code, vandals & computer >viruses. >**************************************************************************** >******** > >This mail was sent via mail.alvarion.com > >**************************************************************************** >******** >This footnote confirms that this email message has been scanned by >PineApp Mail-SeCure for the presence of malicious code, vandals & computer >viruses. >**************************************************************************** >********