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Proposed Revisions to HT PAR

This document proposes revisions for the High Throughput (HT) PAR, including identification of usage models, evaluation metrics, and the support for higher throughput. It also addresses scope and backwards compatibility/interoperability with existing 802.11 standards.

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Proposed Revisions to HT PAR

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  1. Proposed wording revisions to HT PARWednesday, March 12, 2003. Bruce Kraemer, Intersil; Colin Lanzl, Aware; Sean Coffey, TI

  2. Section 18 - Additional Explanatory Details – Existing Text Item 12. In the process of formulating this PAR, it was found that there are multiple user scenarios. Accordingly, the task group will undertake the following steps: 1. Identify and define usage models, channel models and related MAC and application assumptions. Initial usage models envisioned include hot-spot, enterprise and residential; others may be included. 2. Identifyand defineevaluation metrics that characterize the important aspects of a particular usage model. The evaluation metrics may include but are not limited to the items listed in Table 1, provided as an illustration of the format. Table 1: Evaluation Metrics [table not included in this presentation version] #It is intended that throughput will be a primary comparison metric, and at least 100Mbps is the mandatory minimum throughput for the highest throughput usage models.It is anticipated that the amended standard will contain a family of related modes, with different throughputs. It is anticipated that some of these modes will have throughputs that are substantially below 100Mbps, but that are still substantially higher, given similar operating conditions, than any modes in the existing 802.11 standard. Bruce Kraemer, Intersil; Colin Lanzl, Aware; Sean Coffey, TI

  3. Section 18 - Additional Explanatory Details“Existing” and proposed new text on scope Previous version (r0) of proposed first pargraph in Section 18: Item 12. The scope of the MAC and PHY enhancements assume a baseline of 802.11, 802.11a, 802.11b, 802.11d, 802.11e, 802.11g, 802.11h, 802.11i, and 802.11j. The enhancements shall be to support higher throughput. New version of ad-hoc group proposed first paragraph in Section 18: Item 12. The scope of the MAC and PHY enhancements assume a baseline of 802.11 and its amendments and anticipated amendments a, b, d, e, g, h, i, and j. The enhancements shall be to support higher throughput. The amendment shall not redefine mechanisms in the baseline that do not pertain to higher throughput. Bruce Kraemer, Intersil; Colin Lanzl, Aware; Sean Coffey, TI

  4. Section 18 - Proposed new text on backwards compatibility/interoperation To be inserted as second paragraph in Section 18: Some of the modes of operation defined in the HT amendment shall be backwards compatible with 802.11a and/or 802.11g. Bruce Kraemer, Intersil; Colin Lanzl, Aware; Sean Coffey, TI

  5. Section 18 - Proposed new text on scope and backwards compatibility/interoperability New version of ad-hoc group proposed start to Section 18: Item 12. The scope of the MAC and PHY enhancements assume a baseline of 802.11 and its amendments and anticipated amendments a, b, d, e, g, h, i, and j. The enhancements shall be to support higher throughput. The amendment shall not redefine mechanisms in the baseline that do not pertain to higher throughput. Some of the modes of operation defined in the HT amendment shall be backwards compatible with 802.11a and/or 802.11g. Bruce Kraemer, Intersil; Colin Lanzl, Aware; Sean Coffey, TI

  6. Motion Add the following text at the start of Section 18: Item 12. The scope of the MAC and PHY enhancements assume a baseline specification defined by 802.11 and its amendments and anticipated amendments a, b, d, e, g, h, i, and j. The enhancements shall be to support higher throughput. The amendment shall not redefine mechanisms in the baseline that do not pertain to higher throughput. Some of the modes of operation defined in the HT amendment shall be backwards compatible and interoperable with 802.11a and/or 802.11g. Bruce Kraemer, Intersil; Colin Lanzl, Aware; Sean Coffey, TI

  7. For Consideration Thursday Bruce Kraemer, Intersil; Colin Lanzl, Aware; Sean Coffey, TI

  8. PAR Section 18 - Additional Explanatory DetailsProposed text to insert at beginning of Section 18 of PAR  Previously Presented Existing 802.11 standards are typically designated by their peak physical data rates. For example, 802.11a has a peak data rate of 54Mbps but throughput is typically found to be less than 25Mbps, measured at the MAC data SAP. This amendment seeks to improve the throughput to at least 100Mbps, measured at the MAC data SAP, which represents an improvement of at least 4 times the current throughput. Alternate text 1 Existing 802.11 standards are typically designated by their peak physical data rates. For example, 802.11a has a peak data rate of 54Mbps. This amendment has chosen to use a performance metric of throughput measured at the MAC data SAP. This amendment seeks to improve the throughput to at least 100Mbps, measured at the MAC data SAP. Depending on the scenario, this represents an improvement of at least 4 times the throughput obtainable using existing 802.11 systems. Bruce Kraemer, Intersil; Colin Lanzl, Aware; Sean Coffey, TI

  9. PAR Section 18 - Additional Explanatory DetailsProposed text for addition to end of section 18 of PAR The impact of an HT device on the operation of a legacy network shall be comparable to that of any other legacy device. Bruce Kraemer, Intersil; Colin Lanzl, Aware; Sean Coffey, TI

  10. PAR Section 18 - Additional Explanatory DetailsProposed text to add to first note of Table 1 In order to make efficient use of scarce spectral resources in unlicensed bands, the highest throughput mode defined by the HT amendment shall achieve a spectral efficiency of at least 3 bits per second per Hertz for the PSDU. Bruce Kraemer, Intersil; Colin Lanzl, Aware; Sean Coffey, TI

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