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> http://www.av.it.pt
>
>Aveiro - Portugal
>
>Phone: +351 234 377 900
>
>Mobile: +351 96 618 75 82
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>http://daidalos.av.it.pt/~pneves
>
>MSN contact: <mailto:etneves@hotmail.com> etneves@hotmail.com
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>
>
> _____
>
>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
>
>
>
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>
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