Feedback to support restrictive reuse

Details Feedback to support restrictive reuse Feedback to support restrictive reuse

2004-12-22

2009-06-16

Nguyen, David Q (Department: 2617)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S450000, C370S468000, C370S208000, C370S229000, C370S241000, C370S329000, C370S338000, C370S341000

Reexamination Certificate

active

07548752

ABSTRACT:
The scheduler in a base station needs CQI information from a terminal for all reuse sets every 5 ms. to decide on which re-use set to schedule a given terminal. For MIMO users, the problem is that the CQI cannot be reconstructed for all re-use sets, using the current design. Solution: (1) For Multiple Code Word MIMO users, a MIMO VCQI connection layer message enables the base station to reconstruct the MIMO-CQI for all reuse sets on a packet-by-packet basis. This will enable dynamic scheduling (RESTRICTIVE REUSE) gains. (2) For Single Code Word users, dynamic RESTRICTIVE REUSE can be obtained by changing the CQI reporting format, and also sending a MIMO-VCQI connection layer message. (3) For Single Code Word design, quasi-static scheduling gains can be obtained by sending a MIMO-VCQI connection layer message.

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Zhang et al, “Enhanced Feedback Method for Enhanced Fast-Feedback Channels”, IEEE 802.16 Broadband Wireless Access Working Group, [Online] (Nov. 15, 2004), pp. 0-9.
Zhang et al., “Enhanced feedback method for enhanced fast-feedback channels”, IEEE 802.16 Broadband Wireless Access Working Group, (Online) pgs. 1-9 (Nov. 15, 2004).
International Search Report-PCT/US05/046746, International Search Authority-European Patent Office, Apr. 25, 2006.

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