IEEE C802.16e-04/176 Maximum MAC data per frame Yigal Eliaspur, Yuval Lomnitz, Assaf Mor

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Specifications	IEEE C802.16e-04/176 Maximum MAC data per frame Yigal Eliaspur, Yuval Lomnitz, Assaf Mor
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2004-06-27IEEE C802.16e-04/176 1 Maximum MAC data per frame – a new MSS capability Yigal Eliaspur Yuval Lomnitz 1. Moti

Specifications	IEEE C802.16e-04/176 Maximum MAC data per frame Yigal Eliaspur, Yuval Lomnitz, Assaf Mor
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Content	2004-06-27IEEE C802.16e-04/176 1 Maximum MAC data per frame – a new MSS capability Yigal Eliaspur Yuval Lomnitz 1. Motivation Data traffic characteristic to/from an MSS is defined based on Service Flow parameters. Service Flow (SF) parameters (see service flow encoding parameters 11.13 REVd/D5) are specified and negotiated using DSx transactions. Service flows limitation of rate and burst size is been done using the two parameters below: 11.13.6 Maximum sustained traffic rate This parameter defines the peak information rate of the service. The rate is expressed in bits per second and pertains to the SDUs at the input to the system. Explicitly, this parameter does not include MAC overhead such as MAC headers or CRCs. This parameter does not limit the instantaneous rate of the service since this is governed by the physical attributes of the ingress port. However, at the SS in the uplink direction, the service shall be policed to conform to this parameter, on the average, over time. At the BS in the downlink direction, it may be assumed that the service was already policed at the ingress to the network and the BS is not required to do additional policing. If this parameter is omitted or set to zero, then there is no explicitly mandated maximum rate. This field specifies only a bound, not a guarantee that the rate is available. The algorithm for policing to this parameter is left to vendor differentiation and is outside the scope of the standard. 11.13.7 Maximum traffic burst This parameter defines the maximum burst size that shall be accommodated for the service. Since the physical speed of ingress/egress ports, the air interface, and the backhaul will in general be greater than the maximum sustained traffic rate parameter for a service, this parameter describes the maximum continuous burst the system should accommodate for the service assuming the service is not currently using any of its available resources. These parameters do not give the MSS the ability to make fine estimation and prediction for the maximum amount of data the BS will allocate for it per frame which is based on the DL scheduling algorithm the BS maintains. Theoretically, in any combination of the parameters above the MSS Still need to be able to handle a frame in which the entire DL frame is directed to it. The proposal of this contribution is to add explicit parameter to restrict the amount of MAC level data the SS is capable to receive and process in a single MAC frame. The parameter should be per MSS rather then per SF so that multiple SF can share the same limitation in a best effort manner. The motivation is for the 802.16 standard to support simple MSS devices that do not aimed to provide high data rate services and that have limited resources capability like processing power and memory requirements. 2. Changes summary
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Following Datasheets	C80216e-04_176r2 (3 pages) C80216e-04_177r1 (3 pages) C80216e-04_177r2 (3 pages) C80216e-04_178 (4 pages) C80216e-04_179 (2 pages) C80216e-04_179r1 (3 pages) C80216e-04_18 (11 pages) C80216e-04_180 (4 pages) C80216e-04_181 (2 pages) C80216e-04_181r1 (2 pages)
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