This Document Contains the Proposed Resolution for Comment 456-457

July 2010doc.: IEEE 802.22-09/0100r2

IEEE P802.22
Wireless RANs

Proposed resolution for comments 456-457
Date: 2010-07-07
Author(s):
Name / Company / Address / Phone / email
Jianfeng Wang / Philips / 345 Scarborough Road, Briarcliff Manor, NY 10510 / 1-914 945 6247 /

Abstract

This document contains the proposed resolution for comment 456-457.

[Figures 118 and 119 are updated as below]

Modify the paragraph before Figure 118 as follows:

Figure 118 and Figure 119 show in detail how this two-stage mechanism on the operating channel N and two adjacent channels N+/-1 shall be implemented at the BS and the CPEs, respectively. Note that the BLM-REQ MAC message can also be used to request sensing of channels other than N and N+/-1. In such case, the CPE will need to acquire the scheduling of the quiet periods on these channels from their CBP bursts and carry out sensing at the appropriate times.

Note that in-band sensing is also done automatically by all CPEs during quiet periods scheduled by the implicit QP scheduling mechanism using the SCH, see section 9.3.2. In this case, CPEs only signal the presence of incumbents, when detected, by setting the UCS flag in the generic MAC header sent back to the BS in the granted upstream packet or, if not available, through the UCS opportunistic burst.

Figure 118The two-stage sensing procedure at the BS

Figure 119The two-stage sensing procedure at the CPE

[Describe Timer T31 in Table 287 ]

Table 287 — General parameter setting

Entity / Name / Time reference / Min value / Default value / Max value
.. / .. / … / .. / .. / ..
CPE / T29 / Wait for BLM-ACK timeout / 10 ms / 300 ms
BS / T30 / Timeout after which the BS will terminate connection with the CPE / 30 s
BS / T31 / Wait for BLM-REP timeout / 1 MAC frame
.. / .. / .. / .. / .. / ..

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Submissionpage 1Jianfeng Wang, Philips